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git01.mediatek.com / haproxy / 1065e7edb7bd1b536bd3de6531463d16000d4956 / . / src / hlua.c
blob: 0c0895e536d7fe30f90bdbdabfa95b33f558bafe [file] [log] [blame]
/*
* Lua unsafe core engine
*
* Copyright 2015-2016 Thierry Fournier <tfournier@arpalert.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#define _GNU_SOURCE
#include <ctype.h>
#include <setjmp.h>
#include <lauxlib.h>
#include <lua.h>
#include <lualib.h>
#if !defined(LUA_VERSION_NUM) || LUA_VERSION_NUM < 503
#error "Requires Lua 5.3 or later."
#endif
#include <import/ebpttree.h>
#include <haproxy/api.h>
#include <haproxy/applet.h>
#include <haproxy/arg.h>
#include <haproxy/auth.h>
#include <haproxy/cfgparse.h>
#include <haproxy/channel.h>
#include <haproxy/cli.h>
#include <haproxy/connection.h>
#include <haproxy/h1.h>
#include <haproxy/hlua.h>
#include <haproxy/hlua_fcn.h>
#include <haproxy/http_ana.h>
#include <haproxy/http_fetch.h>
#include <haproxy/http_htx.h>
#include <haproxy/http_rules.h>
#include <haproxy/log.h>
#include <haproxy/map.h>
#include <haproxy/obj_type.h>
#include <haproxy/pattern.h>
#include <haproxy/payload.h>
#include <haproxy/proxy.h>
#include <haproxy/regex.h>
#include <haproxy/sample.h>
#include <haproxy/server.h>
#include <haproxy/session.h>
#include <haproxy/stats-t.h>
#include <haproxy/stream.h>
#include <haproxy/stream_interface.h>
#include <haproxy/task.h>
#include <haproxy/tcp_rules.h>
#include <haproxy/thread.h>
#include <haproxy/tools.h>
#include <haproxy/vars.h>
#include <haproxy/xref.h>
/* Lua uses longjmp to perform yield or throwing errors. This
* macro is used only for identifying the function that can
* not return because a longjmp is executed.
* __LJMP marks a prototype of hlua file that can use longjmp.
* WILL_LJMP() marks an lua function that will use longjmp.
* MAY_LJMP() marks an lua function that may use longjmp.
*/
#define __LJMP
#define WILL_LJMP(func) do { func; my_unreachable(); } while(0)
#define MAY_LJMP(func) func
/* This couple of function executes securely some Lua calls outside of
* the lua runtime environment. Each Lua call can return a longjmp
* if it encounter a memory error.
*
* Lua documentation extract:
*
* If an error happens outside any protected environment, Lua calls
* a panic function (see lua_atpanic) and then calls abort, thus
* exiting the host application. Your panic function can avoid this
* exit by never returning (e.g., doing a long jump to your own
* recovery point outside Lua).
*
* The panic function runs as if it were a message handler (see
* §2.3); in particular, the error message is at the top of the
* stack. However, there is no guarantee about stack space. To push
* anything on the stack, the panic function must first check the
* available space (see §4.2).
*
* We must check all the Lua entry point. This includes:
* - The include/proto/hlua.h exported functions
* - the task wrapper function
* - The action wrapper function
* - The converters wrapper function
* - The sample-fetch wrapper functions
*
* It is tolerated that the initialisation function returns an abort.
* Before each Lua abort, an error message is written on stderr.
*
* The macro SET_SAFE_LJMP initialise the longjmp. The Macro
* RESET_SAFE_LJMP reset the longjmp. These function must be macro
* because they must be exists in the program stack when the longjmp
* is called.
*
* Note that the Lua processing is not really thread safe. It provides
* heavy system which consists to add our own lock function in the Lua
* code and recompile the library. This system will probably not accepted
* by maintainers of various distribs.
*
* Our main execution point of the Lua is the function lua_resume(). A
* quick looking on the Lua sources displays a lua_lock() a the start
* of function and a lua_unlock() at the end of the function. So I
* conclude that the Lua thread safe mode just perform a mutex around
* all execution. So I prefer to do this in the HAProxy code, it will be
* easier for distro maintainers.
*
* Note that the HAProxy lua functions rounded by the macro SET_SAFE_LJMP
* and RESET_SAFE_LJMP manipulates the Lua stack, so it will be careful
* to set mutex around these functions.
*/
__decl_spinlock(hlua_global_lock);
THREAD_LOCAL jmp_buf safe_ljmp_env;
static int hlua_panic_safe(lua_State *L) { return 0; }
static int hlua_panic_ljmp(lua_State *L) { WILL_LJMP(longjmp(safe_ljmp_env, 1)); }
/* This is the chained list of struct hlua_function referenced
* for haproxy action, sample-fetches, converters, cli and
* applet bindings. It is used for a post-initialisation control.
*/
static struct list referenced_functions = LIST_HEAD_INIT(referenced_functions);
/* This variable is used only during initialization to identify the Lua state
* currently being initialized. 0 is the common lua state, 1 to n are the Lua
* states dedicated to each thread (in this case hlua_state_id==tid+1).
*/
static int hlua_state_id;
/* This is a NULL-terminated list of lua file which are referenced to load per thread */
static char **per_thread_load = NULL;
lua_State *hlua_init_state(int thread_id);
#define SET_SAFE_LJMP_L(__L, __HLUA) \
({ \
int ret; \
if ((__HLUA)->state_id == 0) \
HA_SPIN_LOCK(LUA_LOCK, &hlua_global_lock); \
if (setjmp(safe_ljmp_env) != 0) { \
lua_atpanic(__L, hlua_panic_safe); \
ret = 0; \
if ((__HLUA)->state_id == 0) \
HA_SPIN_UNLOCK(LUA_LOCK, &hlua_global_lock); \
} else { \
lua_atpanic(__L, hlua_panic_ljmp); \
ret = 1; \
} \
ret; \
})
/* If we are the last function catching Lua errors, we
* must reset the panic function.
*/
#define RESET_SAFE_LJMP_L(__L, __HLUA) \
do { \
lua_atpanic(__L, hlua_panic_safe); \
if ((__HLUA)->state_id == 0) \
HA_SPIN_UNLOCK(LUA_LOCK, &hlua_global_lock); \
} while(0)
#define SET_SAFE_LJMP(__HLUA) \
SET_SAFE_LJMP_L((__HLUA)->T, __HLUA)
#define RESET_SAFE_LJMP(__HLUA) \
RESET_SAFE_LJMP_L((__HLUA)->T, __HLUA)
#define SET_SAFE_LJMP_PARENT(__HLUA) \
SET_SAFE_LJMP_L(hlua_states[(__HLUA)->state_id], __HLUA)
#define RESET_SAFE_LJMP_PARENT(__HLUA) \
RESET_SAFE_LJMP_L(hlua_states[(__HLUA)->state_id], __HLUA)
/* Applet status flags */
#define APPLET_DONE 0x01 /* applet processing is done. */
/* unused: 0x02 */
#define APPLET_HDR_SENT 0x04 /* Response header sent. */
/* unused: 0x08, 0x10 */
#define APPLET_HTTP11 0x20 /* Last chunk sent. */
#define APPLET_RSP_SENT 0x40 /* The response was fully sent */
/* The main Lua execution context. The 0 index is the
* common state shared by all threads.
*/
static lua_State *hlua_states[MAX_THREADS + 1];
/* This is the memory pool containing struct lua for applets
* (including cli).
*/
DECLARE_STATIC_POOL(pool_head_hlua, "hlua", sizeof(struct hlua));
/* Used for Socket connection. */
static struct proxy *socket_proxy;
static struct server *socket_tcp;
#ifdef USE_OPENSSL
static struct server *socket_ssl;
#endif
/* List head of the function called at the initialisation time. */
struct list hlua_init_functions[MAX_THREADS + 1];
/* The following variables contains the reference of the different
* Lua classes. These references are useful for identify metadata
* associated with an object.
*/
static int class_txn_ref;
static int class_socket_ref;
static int class_channel_ref;
static int class_fetches_ref;
static int class_converters_ref;
static int class_http_ref;
static int class_map_ref;
static int class_applet_tcp_ref;
static int class_applet_http_ref;
static int class_txn_reply_ref;
/* Global Lua execution timeout. By default Lua, execution linked
* with stream (actions, sample-fetches and converters) have a
* short timeout. Lua linked with tasks doesn't have a timeout
* because a task may remain alive during all the haproxy execution.
*/
static unsigned int hlua_timeout_session = 4000; /* session timeout. */
static unsigned int hlua_timeout_task = TICK_ETERNITY; /* task timeout. */
static unsigned int hlua_timeout_applet = 4000; /* applet timeout. */
/* Interrupts the Lua processing each "hlua_nb_instruction" instructions.
* it is used for preventing infinite loops.
*
* I test the scheer with an infinite loop containing one incrementation
* and one test. I run this loop between 10 seconds, I raise a ceil of
* 710M loops from one interrupt each 9000 instructions, so I fix the value
* to one interrupt each 10 000 instructions.
*
* configured | Number of
* instructions | loops executed
* between two | in milions
* forced yields |
* ---------------+---------------
* 10 | 160
* 500 | 670
* 1000 | 680
* 5000 | 700
* 7000 | 700
* 8000 | 700
* 9000 | 710 <- ceil
* 10000 | 710
* 100000 | 710
* 1000000 | 710
*
*/
static unsigned int hlua_nb_instruction = 10000;
/* Descriptor for the memory allocation state. The limit is pre-initialised to
* 0 until it is replaced by "tune.lua.maxmem" during the config parsing, or it
* is replaced with ~0 during post_init after everything was loaded. This way
* it is guaranteed that if limit is ~0 the boot is complete and that if it's
* zero it's not yet limited and proper accounting is required.
*/
struct hlua_mem_allocator {
size_t allocated;
size_t limit;
};
static struct hlua_mem_allocator hlua_global_allocator THREAD_ALIGNED(64);
/* These functions converts types between HAProxy internal args or
* sample and LUA types. Another function permits to check if the
* LUA stack contains arguments according with an required ARG_T
* format.
*/
static int hlua_arg2lua(lua_State *L, const struct arg *arg);
static int hlua_lua2arg(lua_State *L, int ud, struct arg *arg);
__LJMP static int hlua_lua2arg_check(lua_State *L, int first, struct arg *argp,
uint64_t mask, struct proxy *p);
static int hlua_smp2lua(lua_State *L, struct sample *smp);
static int hlua_smp2lua_str(lua_State *L, struct sample *smp);
static int hlua_lua2smp(lua_State *L, int ud, struct sample *smp);
__LJMP static int hlua_http_get_headers(lua_State *L, struct http_msg *msg);
struct prepend_path {
struct list l;
char *type;
char *path;
};
static struct list prepend_path_list = LIST_HEAD_INIT(prepend_path_list);
#define SEND_ERR(__be, __fmt, __args...) \
do { \
send_log(__be, LOG_ERR, __fmt, ## __args); \
if (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) \
ha_alert(__fmt, ## __args); \
} while (0)
static inline struct hlua_function *new_hlua_function()
{
struct hlua_function *fcn;
int i;
fcn = calloc(1, sizeof(*fcn));
if (!fcn)
return NULL;
LIST_APPEND(&referenced_functions, &fcn->l);
for (i = 0; i < MAX_THREADS + 1; i++)
fcn->function_ref[i] = -1;
return fcn;
}
static inline void release_hlua_function(struct hlua_function *fcn)
{
if (!fcn)
return;
if (fcn->name)
ha_free(&fcn->name);
LIST_DELETE(&fcn->l);
ha_free(&fcn);
}
/* If the common state is set, the stack id is 0, otherwise it is the tid + 1 */
static inline int fcn_ref_to_stack_id(struct hlua_function *fcn)
{
if (fcn->function_ref[0] == -1)
return tid + 1;
return 0;
}
/* Used to check an Lua function type in the stack. It creates and
* returns a reference of the function. This function throws an
* error if the rgument is not a "function".
*/
__LJMP unsigned int hlua_checkfunction(lua_State *L, int argno)
{
if (!lua_isfunction(L, argno)) {
const char *msg = lua_pushfstring(L, "function expected, got %s", luaL_typename(L, argno));
WILL_LJMP(luaL_argerror(L, argno, msg));
}
lua_pushvalue(L, argno);
return luaL_ref(L, LUA_REGISTRYINDEX);
}
/* Return the string that is of the top of the stack. */
const char *hlua_get_top_error_string(lua_State *L)
{
if (lua_gettop(L) < 1)
return "unknown error";
if (lua_type(L, -1) != LUA_TSTRING)
return "unknown error";
return lua_tostring(L, -1);
}
__LJMP const char *hlua_traceback(lua_State *L, const char* sep)
{
lua_Debug ar;
int level = 0;
struct buffer *msg = get_trash_chunk();
while (lua_getstack(L, level++, &ar)) {
/* Add separator */
if (b_data(msg))
chunk_appendf(msg, "%s", sep);
/* Fill fields:
* 'S': fills in the fields source, short_src, linedefined, lastlinedefined, and what;
* 'l': fills in the field currentline;
* 'n': fills in the field name and namewhat;
* 't': fills in the field istailcall;
*/
lua_getinfo(L, "Slnt", &ar);
/* Append code localisation */
if (ar.currentline > 0)
chunk_appendf(msg, "%s:%d: ", ar.short_src, ar.currentline);
else
chunk_appendf(msg, "%s: ", ar.short_src);
/*
* Get function name
*
* if namewhat is no empty, name is defined.
* what contains "Lua" for Lua function, "C" for C function,
* or "main" for main code.
*/
if (*ar.namewhat != '\0' && ar.name != NULL) /* is there a name from code? */
chunk_appendf(msg, "in %s '%s'", ar.namewhat, ar.name); /* use it */
else if (*ar.what == 'm') /* "main", the code is not executed in a function */
chunk_appendf(msg, "in main chunk");
else if (*ar.what != 'C') /* for Lua functions, use <file:line> */
chunk_appendf(msg, "in function line %d", ar.linedefined);
else /* nothing left... */
chunk_appendf(msg, "?");
/* Display tailed call */
if (ar.istailcall)
chunk_appendf(msg, " ...");
}
return msg->area;
}
/* This function check the number of arguments available in the
* stack. If the number of arguments available is not the same
* then <nb> an error is thrown.
*/
__LJMP static inline void check_args(lua_State *L, int nb, char *fcn)
{
if (lua_gettop(L) == nb)
return;
WILL_LJMP(luaL_error(L, "'%s' needs %d arguments", fcn, nb));
}
/* This function pushes an error string prefixed by the file name
* and the line number where the error is encountered.
*/
static int hlua_pusherror(lua_State *L, const char *fmt, ...)
{
va_list argp;
va_start(argp, fmt);
luaL_where(L, 1);
lua_pushvfstring(L, fmt, argp);
va_end(argp);
lua_concat(L, 2);
return 1;
}
/* This functions is used with sample fetch and converters. It
* converts the HAProxy configuration argument in a lua stack
* values.
*
* It takes an array of "arg", and each entry of the array is
* converted and pushed in the LUA stack.
*/
static int hlua_arg2lua(lua_State *L, const struct arg *arg)
{
switch (arg->type) {
case ARGT_SINT:
case ARGT_TIME:
case ARGT_SIZE:
lua_pushinteger(L, arg->data.sint);
break;
case ARGT_STR:
lua_pushlstring(L, arg->data.str.area, arg->data.str.data);
break;
case ARGT_IPV4:
case ARGT_IPV6:
case ARGT_MSK4:
case ARGT_MSK6:
case ARGT_FE:
case ARGT_BE:
case ARGT_TAB:
case ARGT_SRV:
case ARGT_USR:
case ARGT_MAP:
default:
lua_pushnil(L);
break;
}
return 1;
}
/* This function take one entry in an LUA stack at the index "ud",
* and try to convert it in an HAProxy argument entry. This is useful
* with sample fetch wrappers. The input arguments are given to the
* lua wrapper and converted as arg list by the function.
*/
static int hlua_lua2arg(lua_State *L, int ud, struct arg *arg)
{
switch (lua_type(L, ud)) {
case LUA_TNUMBER:
case LUA_TBOOLEAN:
arg->type = ARGT_SINT;
arg->data.sint = lua_tointeger(L, ud);
break;
case LUA_TSTRING:
arg->type = ARGT_STR;
arg->data.str.area = (char *)lua_tolstring(L, ud, &arg->data.str.data);
/* We don't know the actual size of the underlying allocation, so be conservative. */
arg->data.str.size = arg->data.str.data+1; /* count the terminating null byte */
arg->data.str.head = 0;
break;
case LUA_TUSERDATA:
case LUA_TNIL:
case LUA_TTABLE:
case LUA_TFUNCTION:
case LUA_TTHREAD:
case LUA_TLIGHTUSERDATA:
arg->type = ARGT_SINT;
arg->data.sint = 0;
break;
}
return 1;
}
/* the following functions are used to convert a struct sample
* in Lua type. This useful to convert the return of the
* fetches or converters.
*/
static int hlua_smp2lua(lua_State *L, struct sample *smp)
{
switch (smp->data.type) {
case SMP_T_SINT:
case SMP_T_BOOL:
lua_pushinteger(L, smp->data.u.sint);
break;
case SMP_T_BIN:
case SMP_T_STR:
lua_pushlstring(L, smp->data.u.str.area, smp->data.u.str.data);
break;
case SMP_T_METH:
switch (smp->data.u.meth.meth) {
case HTTP_METH_OPTIONS: lua_pushstring(L, "OPTIONS"); break;
case HTTP_METH_GET: lua_pushstring(L, "GET"); break;
case HTTP_METH_HEAD: lua_pushstring(L, "HEAD"); break;
case HTTP_METH_POST: lua_pushstring(L, "POST"); break;
case HTTP_METH_PUT: lua_pushstring(L, "PUT"); break;
case HTTP_METH_DELETE: lua_pushstring(L, "DELETE"); break;
case HTTP_METH_TRACE: lua_pushstring(L, "TRACE"); break;
case HTTP_METH_CONNECT: lua_pushstring(L, "CONNECT"); break;
case HTTP_METH_OTHER:
lua_pushlstring(L, smp->data.u.meth.str.area, smp->data.u.meth.str.data);
break;
default:
lua_pushnil(L);
break;
}
break;
case SMP_T_IPV4:
case SMP_T_IPV6:
case SMP_T_ADDR: /* This type is never used to qualify a sample. */
if (sample_casts[smp->data.type][SMP_T_STR] &&
sample_casts[smp->data.type][SMP_T_STR](smp))
lua_pushlstring(L, smp->data.u.str.area, smp->data.u.str.data);
else
lua_pushnil(L);
break;
default:
lua_pushnil(L);
break;
}
return 1;
}
/* the following functions are used to convert a struct sample
* in Lua strings. This is useful to convert the return of the
* fetches or converters.
*/
static int hlua_smp2lua_str(lua_State *L, struct sample *smp)
{
switch (smp->data.type) {
case SMP_T_BIN:
case SMP_T_STR:
lua_pushlstring(L, smp->data.u.str.area, smp->data.u.str.data);
break;
case SMP_T_METH:
switch (smp->data.u.meth.meth) {
case HTTP_METH_OPTIONS: lua_pushstring(L, "OPTIONS"); break;
case HTTP_METH_GET: lua_pushstring(L, "GET"); break;
case HTTP_METH_HEAD: lua_pushstring(L, "HEAD"); break;
case HTTP_METH_POST: lua_pushstring(L, "POST"); break;
case HTTP_METH_PUT: lua_pushstring(L, "PUT"); break;
case HTTP_METH_DELETE: lua_pushstring(L, "DELETE"); break;
case HTTP_METH_TRACE: lua_pushstring(L, "TRACE"); break;
case HTTP_METH_CONNECT: lua_pushstring(L, "CONNECT"); break;
case HTTP_METH_OTHER:
lua_pushlstring(L, smp->data.u.meth.str.area, smp->data.u.meth.str.data);
break;
default:
lua_pushstring(L, "");
break;
}
break;
case SMP_T_SINT:
case SMP_T_BOOL:
case SMP_T_IPV4:
case SMP_T_IPV6:
case SMP_T_ADDR: /* This type is never used to qualify a sample. */
if (sample_casts[smp->data.type][SMP_T_STR] &&
sample_casts[smp->data.type][SMP_T_STR](smp))
lua_pushlstring(L, smp->data.u.str.area, smp->data.u.str.data);
else
lua_pushstring(L, "");
break;
default:
lua_pushstring(L, "");
break;
}
return 1;
}
/* the following functions are used to convert an Lua type in a
* struct sample. This is useful to provide data from a converter
* to the LUA code.
*/
static int hlua_lua2smp(lua_State *L, int ud, struct sample *smp)
{
switch (lua_type(L, ud)) {
case LUA_TNUMBER:
smp->data.type = SMP_T_SINT;
smp->data.u.sint = lua_tointeger(L, ud);
break;
case LUA_TBOOLEAN:
smp->data.type = SMP_T_BOOL;
smp->data.u.sint = lua_toboolean(L, ud);
break;
case LUA_TSTRING:
smp->data.type = SMP_T_STR;
smp->flags |= SMP_F_CONST;
smp->data.u.str.area = (char *)lua_tolstring(L, ud, &smp->data.u.str.data);
/* We don't know the actual size of the underlying allocation, so be conservative. */
smp->data.u.str.size = smp->data.u.str.data+1; /* count the terminating null byte */
smp->data.u.str.head = 0;
break;
case LUA_TUSERDATA:
case LUA_TNIL:
case LUA_TTABLE:
case LUA_TFUNCTION:
case LUA_TTHREAD:
case LUA_TLIGHTUSERDATA:
case LUA_TNONE:
default:
smp->data.type = SMP_T_BOOL;
smp->data.u.sint = 0;
break;
}
return 1;
}
/* This function check the "argp" built by another conversion function
* is in accord with the expected argp defined by the "mask". The function
* returns true or false. It can be adjust the types if there compatibles.
*
* This function assumes that the argp argument contains ARGM_NBARGS + 1
* entries.
*/
__LJMP int hlua_lua2arg_check(lua_State *L, int first, struct arg *argp,
uint64_t mask, struct proxy *p)
{
int min_arg;
int i, idx;
struct proxy *px;
struct userlist *ul;
struct my_regex *reg;
const char *msg = NULL;
char *sname, *pname, *err = NULL;
idx = 0;
min_arg = ARGM(mask);
mask >>= ARGM_BITS;
while (1) {
struct buffer tmp = BUF_NULL;
/* Check oversize. */
if (idx >= ARGM_NBARGS && argp[idx].type != ARGT_STOP) {
msg = "Malformed argument mask";
goto error;
}
/* Check for mandatory arguments. */
if (argp[idx].type == ARGT_STOP) {
if (idx < min_arg) {
/* If miss other argument than the first one, we return an error. */
if (idx > 0) {
msg = "Mandatory argument expected";
goto error;
}
/* If first argument have a certain type, some default values
* may be used. See the function smp_resolve_args().
*/
switch (mask & ARGT_MASK) {
case ARGT_FE:
if (!(p->cap & PR_CAP_FE)) {
msg = "Mandatory argument expected";
goto error;
}
argp[idx].data.prx = p;
argp[idx].type = ARGT_FE;
argp[idx+1].type = ARGT_STOP;
break;
case ARGT_BE:
if (!(p->cap & PR_CAP_BE)) {
msg = "Mandatory argument expected";
goto error;
}
argp[idx].data.prx = p;
argp[idx].type = ARGT_BE;
argp[idx+1].type = ARGT_STOP;
break;
case ARGT_TAB:
argp[idx].data.prx = p;
argp[idx].type = ARGT_TAB;
argp[idx+1].type = ARGT_STOP;
break;
default:
msg = "Mandatory argument expected";
goto error;
break;
}
}
break;
}
/* Check for exceed the number of required argument. */
if ((mask & ARGT_MASK) == ARGT_STOP &&
argp[idx].type != ARGT_STOP) {
msg = "Last argument expected";
goto error;
}
if ((mask & ARGT_MASK) == ARGT_STOP &&
argp[idx].type == ARGT_STOP) {
break;
}
/* Convert some argument types. All string in argp[] are for not
* duplicated yet.
*/
switch (mask & ARGT_MASK) {
case ARGT_SINT:
if (argp[idx].type != ARGT_SINT) {
msg = "integer expected";
goto error;
}
argp[idx].type = ARGT_SINT;
break;
case ARGT_TIME:
if (argp[idx].type != ARGT_SINT) {
msg = "integer expected";
goto error;
}
argp[idx].type = ARGT_TIME;
break;
case ARGT_SIZE:
if (argp[idx].type != ARGT_SINT) {
msg = "integer expected";
goto error;
}
argp[idx].type = ARGT_SIZE;
break;
case ARGT_FE:
if (argp[idx].type != ARGT_STR) {
msg = "string expected";
goto error;
}
argp[idx].data.prx = proxy_fe_by_name(argp[idx].data.str.area);
if (!argp[idx].data.prx) {
msg = "frontend doesn't exist";
goto error;
}
argp[idx].type = ARGT_FE;
break;
case ARGT_BE:
if (argp[idx].type != ARGT_STR) {
msg = "string expected";
goto error;
}
argp[idx].data.prx = proxy_be_by_name(argp[idx].data.str.area);
if (!argp[idx].data.prx) {
msg = "backend doesn't exist";
goto error;
}
argp[idx].type = ARGT_BE;
break;
case ARGT_TAB:
if (argp[idx].type != ARGT_STR) {
msg = "string expected";
goto error;
}
argp[idx].data.t = stktable_find_by_name(argp[idx].data.str.area);
if (!argp[idx].data.t) {
msg = "table doesn't exist";
goto error;
}
argp[idx].type = ARGT_TAB;
break;
case ARGT_SRV:
if (argp[idx].type != ARGT_STR) {
msg = "string expected";
goto error;
}
sname = strrchr(argp[idx].data.str.area, '/');
if (sname) {
*sname++ = '\0';
pname = argp[idx].data.str.area;
px = proxy_be_by_name(pname);
if (!px) {
msg = "backend doesn't exist";
goto error;
}
}
else {
sname = argp[idx].data.str.area;
px = p;
}
argp[idx].data.srv = findserver(px, sname);
if (!argp[idx].data.srv) {
msg = "server doesn't exist";
goto error;
}
argp[idx].type = ARGT_SRV;
break;
case ARGT_IPV4:
if (argp[idx].type != ARGT_STR) {
msg = "string expected";
goto error;
}
if (inet_pton(AF_INET, argp[idx].data.str.area, &argp[idx].data.ipv4)) {
msg = "invalid IPv4 address";
goto error;
}
argp[idx].type = ARGT_IPV4;
break;
case ARGT_MSK4:
if (argp[idx].type == ARGT_SINT)
len2mask4(argp[idx].data.sint, &argp[idx].data.ipv4);
else if (argp[idx].type == ARGT_STR) {
if (!str2mask(argp[idx].data.str.area, &argp[idx].data.ipv4)) {
msg = "invalid IPv4 mask";
goto error;
}
}
else {
msg = "integer or string expected";
goto error;
}
argp[idx].type = ARGT_MSK4;
break;
case ARGT_IPV6:
if (argp[idx].type != ARGT_STR) {
msg = "string expected";
goto error;
}
if (inet_pton(AF_INET6, argp[idx].data.str.area, &argp[idx].data.ipv6)) {
msg = "invalid IPv6 address";
goto error;
}
argp[idx].type = ARGT_IPV6;
break;
case ARGT_MSK6:
if (argp[idx].type == ARGT_SINT)
len2mask6(argp[idx].data.sint, &argp[idx].data.ipv6);
else if (argp[idx].type == ARGT_STR) {
if (!str2mask6(argp[idx].data.str.area, &argp[idx].data.ipv6)) {
msg = "invalid IPv6 mask";
goto error;
}
}
else {
msg = "integer or string expected";
goto error;
}
argp[idx].type = ARGT_MSK6;
break;
case ARGT_REG:
if (argp[idx].type != ARGT_STR) {
msg = "string expected";
goto error;
}
reg = regex_comp(argp[idx].data.str.area, !(argp[idx].type_flags & ARGF_REG_ICASE), 1, &err);
if (!reg) {
msg = lua_pushfstring(L, "error compiling regex '%s' : '%s'",
argp[idx].data.str.area, err);
free(err);
goto error;
}
argp[idx].type = ARGT_REG;
argp[idx].data.reg = reg;
break;
case ARGT_USR:
if (argp[idx].type != ARGT_STR) {
msg = "string expected";
goto error;
}
if (p->uri_auth && p->uri_auth->userlist &&
strcmp(p->uri_auth->userlist->name, argp[idx].data.str.area) == 0)
ul = p->uri_auth->userlist;
else
ul = auth_find_userlist(argp[idx].data.str.area);
if (!ul) {
msg = lua_pushfstring(L, "unable to find userlist '%s'", argp[idx].data.str.area);
goto error;
}
argp[idx].type = ARGT_USR;
argp[idx].data.usr = ul;
break;
case ARGT_STR:
if (!chunk_dup(&tmp, &argp[idx].data.str)) {
msg = "unable to duplicate string arg";
goto error;
}
argp[idx].data.str = tmp;
break;
case ARGT_MAP:
msg = "type not yet supported";
goto error;
break;
}
/* Check for type of argument. */
if ((mask & ARGT_MASK) != argp[idx].type) {
msg = lua_pushfstring(L, "'%s' expected, got '%s'",
arg_type_names[(mask & ARGT_MASK)],
arg_type_names[argp[idx].type & ARGT_MASK]);
goto error;
}
/* Next argument. */
mask >>= ARGT_BITS;
idx++;
}
return 0;
error:
for (i = 0; i < idx; i++) {
if (argp[i].type == ARGT_STR)
chunk_destroy(&argp[i].data.str);
else if (argp[i].type == ARGT_REG)
regex_free(argp[i].data.reg);
}
WILL_LJMP(luaL_argerror(L, first + idx, msg));
return 0; /* Never reached */
}
/*
* The following functions are used to make correspondence between the the
* executed lua pointer and the "struct hlua *" that contain the context.
*
* - hlua_gethlua : return the hlua context associated with an lua_State.
* - hlua_sethlua : create the association between hlua context and lua_state.
*/
static inline struct hlua *hlua_gethlua(lua_State *L)
{
struct hlua **hlua = lua_getextraspace(L);
return *hlua;
}
static inline void hlua_sethlua(struct hlua *hlua)
{
struct hlua **hlua_store = lua_getextraspace(hlua->T);
*hlua_store = hlua;
}
/* This function is used to send logs. It try to send on screen (stderr)
* and on the default syslog server.
*/
static inline void hlua_sendlog(struct proxy *px, int level, const char *msg)
{
struct tm tm;
char *p;
/* Cleanup the log message. */
p = trash.area;
for (; *msg != '\0'; msg++, p++) {
if (p >= trash.area + trash.size - 1) {
/* Break the message if exceed the buffer size. */
*(p-4) = ' ';
*(p-3) = '.';
*(p-2) = '.';
*(p-1) = '.';
break;
}
if (isprint((unsigned char)*msg))
*p = *msg;
else
*p = '.';
}
*p = '\0';
send_log(px, level, "%s\n", trash.area);
if (!(global.mode & MODE_QUIET) || (global.mode & (MODE_VERBOSE | MODE_STARTING))) {
if (level == LOG_DEBUG && !(global.mode & MODE_DEBUG))
return;
get_localtime(date.tv_sec, &tm);
fprintf(stderr, "[%s] %03d/%02d%02d%02d (%d) : %s\n",
log_levels[level], tm.tm_yday, tm.tm_hour, tm.tm_min, tm.tm_sec,
(int)getpid(), trash.area);
fflush(stderr);
}
}
/* This function just ensure that the yield will be always
* returned with a timeout and permit to set some flags
*/
__LJMP void hlua_yieldk(lua_State *L, int nresults, int ctx,
lua_KFunction k, int timeout, unsigned int flags)
{
struct hlua *hlua;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua) {
return;
}
/* Set the wake timeout. If timeout is required, we set
* the expiration time.
*/
hlua->wake_time = timeout;
hlua->flags |= flags;
/* Process the yield. */
MAY_LJMP(lua_yieldk(L, nresults, ctx, k));
}
/* This function initialises the Lua environment stored in the stream.
* It must be called at the start of the stream. This function creates
* an LUA coroutine. It can not be use to crete the main LUA context.
*
* This function is particular. it initialises a new Lua thread. If the
* initialisation fails (example: out of memory error), the lua function
* throws an error (longjmp).
*
* In some case (at least one), this function can be called from safe
* environment, so we must not initialise it. While the support of
* threads appear, the safe environment set a lock to ensure only one
* Lua execution at a time. If we initialize safe environment in another
* safe environment, we have a dead lock.
*
* set "already_safe" true if the context is initialized form safe
* Lua function.
*
* This function manipulates two Lua stacks: the main and the thread. Only
* the main stack can fail. The thread is not manipulated. This function
* MUST NOT manipulate the created thread stack state, because it is not
* protected against errors thrown by the thread stack.
*/
int hlua_ctx_init(struct hlua *lua, int state_id, struct task *task, int already_safe)
{
lua->Mref = LUA_REFNIL;
lua->flags = 0;
lua->gc_count = 0;
lua->wake_time = TICK_ETERNITY;
lua->state_id = state_id;
LIST_INIT(&lua->com);
if (!already_safe) {
if (!SET_SAFE_LJMP_PARENT(lua)) {
lua->Tref = LUA_REFNIL;
return 0;
}
}
lua->T = lua_newthread(hlua_states[state_id]);
if (!lua->T) {
lua->Tref = LUA_REFNIL;
if (!already_safe)
RESET_SAFE_LJMP_PARENT(lua);
return 0;
}
hlua_sethlua(lua);
lua->Tref = luaL_ref(hlua_states[state_id], LUA_REGISTRYINDEX);
lua->task = task;
if (!already_safe)
RESET_SAFE_LJMP_PARENT(lua);
return 1;
}
/* Used to destroy the Lua coroutine when the attached stream or task
* is destroyed. The destroy also the memory context. The struct "lua"
* is not freed.
*/
void hlua_ctx_destroy(struct hlua *lua)
{
if (!lua)
return;
if (!lua->T)
goto end;
/* Purge all the pending signals. */
notification_purge(&lua->com);
if (!SET_SAFE_LJMP(lua))
return;
luaL_unref(lua->T, LUA_REGISTRYINDEX, lua->Mref);
RESET_SAFE_LJMP(lua);
if (!SET_SAFE_LJMP_PARENT(lua))
return;
luaL_unref(hlua_states[lua->state_id], LUA_REGISTRYINDEX, lua->Tref);
RESET_SAFE_LJMP_PARENT(lua);
/* Forces a garbage collecting process. If the Lua program is finished
* without error, we run the GC on the thread pointer. Its freed all
* the unused memory.
* If the thread is finnish with an error or is currently yielded,
* it seems that the GC applied on the thread doesn't clean anything,
* so e run the GC on the main thread.
* NOTE: maybe this action locks all the Lua threads untiml the en of
* the garbage collection.
*/
if (lua->gc_count) {
if (!SET_SAFE_LJMP_PARENT(lua))
return;
lua_gc(hlua_states[lua->state_id], LUA_GCCOLLECT, 0);
RESET_SAFE_LJMP_PARENT(lua);
}
lua->T = NULL;
end:
pool_free(pool_head_hlua, lua);
}
/* This function is used to restore the Lua context when a coroutine
* fails. This function copy the common memory between old coroutine
* and the new coroutine. The old coroutine is destroyed, and its
* replaced by the new coroutine.
* If the flag "keep_msg" is set, the last entry of the old is assumed
* as string error message and it is copied in the new stack.
*/
static int hlua_ctx_renew(struct hlua *lua, int keep_msg)
{
lua_State *T;
int new_ref;
/* New Lua coroutine. */
T = lua_newthread(hlua_states[lua->state_id]);
if (!T)
return 0;
/* Copy last error message. */
if (keep_msg)
lua_xmove(lua->T, T, 1);
/* Copy data between the coroutines. */
lua_rawgeti(lua->T, LUA_REGISTRYINDEX, lua->Mref);
lua_xmove(lua->T, T, 1);
new_ref = luaL_ref(T, LUA_REGISTRYINDEX); /* Value popped. */
/* Destroy old data. */
luaL_unref(lua->T, LUA_REGISTRYINDEX, lua->Mref);
/* The thread is garbage collected by Lua. */
luaL_unref(hlua_states[lua->state_id], LUA_REGISTRYINDEX, lua->Tref);
/* Fill the struct with the new coroutine values. */
lua->Mref = new_ref;
lua->T = T;
lua->Tref = luaL_ref(hlua_states[lua->state_id], LUA_REGISTRYINDEX);
/* Set context. */
hlua_sethlua(lua);
return 1;
}
void hlua_hook(lua_State *L, lua_Debug *ar)
{
struct hlua *hlua;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua)
return;
/* Lua cannot yield when its returning from a function,
* so, we can fix the interrupt hook to 1 instruction,
* expecting that the function is finished.
*/
if (lua_gethookmask(L) & LUA_MASKRET) {
lua_sethook(hlua->T, hlua_hook, LUA_MASKCOUNT, 1);
return;
}
/* restore the interrupt condition. */
lua_sethook(hlua->T, hlua_hook, LUA_MASKCOUNT, hlua_nb_instruction);
/* If we interrupt the Lua processing in yieldable state, we yield.
* If the state is not yieldable, trying yield causes an error.
*/
if (lua_isyieldable(L))
MAY_LJMP(hlua_yieldk(L, 0, 0, NULL, TICK_ETERNITY, HLUA_CTRLYIELD));
/* If we cannot yield, update the clock and check the timeout. */
tv_update_date(0, 1);
hlua->run_time += now_ms - hlua->start_time;
if (hlua->max_time && hlua->run_time >= hlua->max_time) {
lua_pushfstring(L, "execution timeout");
WILL_LJMP(lua_error(L));
}
/* Update the start time. */
hlua->start_time = now_ms;
/* Try to interrupt the process at the end of the current
* unyieldable function.
*/
lua_sethook(hlua->T, hlua_hook, LUA_MASKRET|LUA_MASKCOUNT, hlua_nb_instruction);
}
/* This function start or resumes the Lua stack execution. If the flag
* "yield_allowed" if no set and the LUA stack execution returns a yield
* The function return an error.
*
* The function can returns 4 values:
* - HLUA_E_OK : The execution is terminated without any errors.
* - HLUA_E_AGAIN : The execution must continue at the next associated
* task wakeup.
* - HLUA_E_ERRMSG : An error has occurred, an error message is set in
* the top of the stack.
* - HLUA_E_ERR : An error has occurred without error message.
*
* If an error occurred, the stack is renewed and it is ready to run new
* LUA code.
*/
static enum hlua_exec hlua_ctx_resume(struct hlua *lua, int yield_allowed)
{
#if defined(LUA_VERSION_NUM) && LUA_VERSION_NUM >= 504
int nres;
#endif
int ret;
const char *msg;
const char *trace;
/* Initialise run time counter. */
if (!HLUA_IS_RUNNING(lua))
lua->run_time = 0;
/* Lock the whole Lua execution. This lock must be before the
* label "resume_execution".
*/
if (lua->state_id == 0)
HA_SPIN_LOCK(LUA_LOCK, &hlua_global_lock);
resume_execution:
/* This hook interrupts the Lua processing each 'hlua_nb_instruction'
* instructions. it is used for preventing infinite loops.
*/
lua_sethook(lua->T, hlua_hook, LUA_MASKCOUNT, hlua_nb_instruction);
/* Remove all flags except the running flags. */
HLUA_SET_RUN(lua);
HLUA_CLR_CTRLYIELD(lua);
HLUA_CLR_WAKERESWR(lua);
HLUA_CLR_WAKEREQWR(lua);
/* Update the start time and reset wake_time. */
lua->start_time = now_ms;
lua->wake_time = TICK_ETERNITY;
/* Call the function. */
#if defined(LUA_VERSION_NUM) && LUA_VERSION_NUM >= 504
ret = lua_resume(lua->T, hlua_states[lua->state_id], lua->nargs, &nres);
#else
ret = lua_resume(lua->T, hlua_states[lua->state_id], lua->nargs);
#endif
switch (ret) {
case LUA_OK:
ret = HLUA_E_OK;
break;
case LUA_YIELD:
/* Check if the execution timeout is expired. It it is the case, we
* break the Lua execution.
*/
tv_update_date(0, 1);
lua->run_time += now_ms - lua->start_time;
if (lua->max_time && lua->run_time > lua->max_time) {
lua_settop(lua->T, 0); /* Empty the stack. */
ret = HLUA_E_ETMOUT;
break;
}
/* Process the forced yield. if the general yield is not allowed or
* if no task were associated this the current Lua execution
* coroutine, we resume the execution. Else we want to return in the
* scheduler and we want to be waked up again, to continue the
* current Lua execution. So we schedule our own task.
*/
if (HLUA_IS_CTRLYIELDING(lua)) {
if (!yield_allowed || !lua->task)
goto resume_execution;
task_wakeup(lua->task, TASK_WOKEN_MSG);
}
if (!yield_allowed) {
lua_settop(lua->T, 0); /* Empty the stack. */
ret = HLUA_E_YIELD;
break;
}
ret = HLUA_E_AGAIN;
break;
case LUA_ERRRUN:
/* Special exit case. The traditional exit is returned as an error
* because the errors ares the only one mean to return immediately
* from and lua execution.
*/
if (lua->flags & HLUA_EXIT) {
ret = HLUA_E_OK;
hlua_ctx_renew(lua, 1);
break;
}
lua->wake_time = TICK_ETERNITY;
if (!lua_checkstack(lua->T, 1)) {
ret = HLUA_E_ERR;
break;
}
msg = lua_tostring(lua->T, -1);
lua_settop(lua->T, 0); /* Empty the stack. */
lua_pop(lua->T, 1);
trace = hlua_traceback(lua->T, ", ");
if (msg)
lua_pushfstring(lua->T, "[state-id %d] runtime error: %s from %s", lua->state_id, msg, trace);
else
lua_pushfstring(lua->T, "[state-id %d] unknown runtime error from %s", lua->state_id, trace);
ret = HLUA_E_ERRMSG;
break;
case LUA_ERRMEM:
lua->wake_time = TICK_ETERNITY;
lua_settop(lua->T, 0); /* Empty the stack. */
ret = HLUA_E_NOMEM;
break;
case LUA_ERRERR:
lua->wake_time = TICK_ETERNITY;
if (!lua_checkstack(lua->T, 1)) {
ret = HLUA_E_ERR;
break;
}
msg = lua_tostring(lua->T, -1);
lua_settop(lua->T, 0); /* Empty the stack. */
lua_pop(lua->T, 1);
if (msg)
lua_pushfstring(lua->T, "[state-id %d] message handler error: %s", lua->state_id, msg);
else
lua_pushfstring(lua->T, "[state-id %d] message handler error", lua->state_id);
ret = HLUA_E_ERRMSG;
break;
default:
lua->wake_time = TICK_ETERNITY;
lua_settop(lua->T, 0); /* Empty the stack. */
ret = HLUA_E_ERR;
break;
}
switch (ret) {
case HLUA_E_AGAIN:
break;
case HLUA_E_ERRMSG:
notification_purge(&lua->com);
hlua_ctx_renew(lua, 1);
HLUA_CLR_RUN(lua);
break;
case HLUA_E_ETMOUT:
case HLUA_E_NOMEM:
case HLUA_E_YIELD:
case HLUA_E_ERR:
HLUA_CLR_RUN(lua);
notification_purge(&lua->com);
hlua_ctx_renew(lua, 0);
break;
case HLUA_E_OK:
HLUA_CLR_RUN(lua);
notification_purge(&lua->com);
break;
}
/* This is the main exit point, remove the Lua lock. */
if (lua->state_id == 0)
HA_SPIN_UNLOCK(LUA_LOCK, &hlua_global_lock);
return ret;
}
/* This function exit the current code. */
__LJMP static int hlua_done(lua_State *L)
{
struct hlua *hlua;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua)
return 0;
hlua->flags |= HLUA_EXIT;
WILL_LJMP(lua_error(L));
return 0;
}
/* This function is an LUA binding. It provides a function
* for deleting ACL from a referenced ACL file.
*/
__LJMP static int hlua_del_acl(lua_State *L)
{
const char *name;
const char *key;
struct pat_ref *ref;
MAY_LJMP(check_args(L, 2, "del_acl"));
name = MAY_LJMP(luaL_checkstring(L, 1));
key = MAY_LJMP(luaL_checkstring(L, 2));
ref = pat_ref_lookup(name);
if (!ref)
WILL_LJMP(luaL_error(L, "'del_acl': unknown acl file '%s'", name));
HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
pat_ref_delete(ref, key);
HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
return 0;
}
/* This function is an LUA binding. It provides a function
* for deleting map entry from a referenced map file.
*/
static int hlua_del_map(lua_State *L)
{
const char *name;
const char *key;
struct pat_ref *ref;
MAY_LJMP(check_args(L, 2, "del_map"));
name = MAY_LJMP(luaL_checkstring(L, 1));
key = MAY_LJMP(luaL_checkstring(L, 2));
ref = pat_ref_lookup(name);
if (!ref)
WILL_LJMP(luaL_error(L, "'del_map': unknown acl file '%s'", name));
HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
pat_ref_delete(ref, key);
HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
return 0;
}
/* This function is an LUA binding. It provides a function
* for adding ACL pattern from a referenced ACL file.
*/
static int hlua_add_acl(lua_State *L)
{
const char *name;
const char *key;
struct pat_ref *ref;
MAY_LJMP(check_args(L, 2, "add_acl"));
name = MAY_LJMP(luaL_checkstring(L, 1));
key = MAY_LJMP(luaL_checkstring(L, 2));
ref = pat_ref_lookup(name);
if (!ref)
WILL_LJMP(luaL_error(L, "'add_acl': unknown acl file '%s'", name));
HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
if (pat_ref_find_elt(ref, key) == NULL)
pat_ref_add(ref, key, NULL, NULL);
HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
return 0;
}
/* This function is an LUA binding. It provides a function
* for setting map pattern and sample from a referenced map
* file.
*/
static int hlua_set_map(lua_State *L)
{
const char *name;
const char *key;
const char *value;
struct pat_ref *ref;
MAY_LJMP(check_args(L, 3, "set_map"));
name = MAY_LJMP(luaL_checkstring(L, 1));
key = MAY_LJMP(luaL_checkstring(L, 2));
value = MAY_LJMP(luaL_checkstring(L, 3));
ref = pat_ref_lookup(name);
if (!ref)
WILL_LJMP(luaL_error(L, "'set_map': unknown map file '%s'", name));
HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
if (pat_ref_find_elt(ref, key) != NULL)
pat_ref_set(ref, key, value, NULL);
else
pat_ref_add(ref, key, value, NULL);
HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
return 0;
}
/* A class is a lot of memory that contain data. This data can be a table,
* an integer or user data. This data is associated with a metatable. This
* metatable have an original version registered in the global context with
* the name of the object (_G[<name>] = <metable> ).
*
* A metable is a table that modify the standard behavior of a standard
* access to the associated data. The entries of this new metatable are
* defined as is:
*
* http://lua-users.org/wiki/MetatableEvents
*
* __index
*
* we access an absent field in a table, the result is nil. This is
* true, but it is not the whole truth. Actually, such access triggers
* the interpreter to look for an __index metamethod: If there is no
* such method, as usually happens, then the access results in nil;
* otherwise, the metamethod will provide the result.
*
* Control 'prototype' inheritance. When accessing "myTable[key]" and
* the key does not appear in the table, but the metatable has an __index
* property:
*
* - if the value is a function, the function is called, passing in the
* table and the key; the return value of that function is returned as
* the result.
*
* - if the value is another table, the value of the key in that table is
* asked for and returned (and if it doesn't exist in that table, but that
* table's metatable has an __index property, then it continues on up)
*
* - Use "rawget(myTable,key)" to skip this metamethod.
*
* http://www.lua.org/pil/13.4.1.html
*
* __newindex
*
* Like __index, but control property assignment.
*
* __mode - Control weak references. A string value with one or both
* of the characters 'k' and 'v' which specifies that the the
* keys and/or values in the table are weak references.
*
* __call - Treat a table like a function. When a table is followed by
* parenthesis such as "myTable( 'foo' )" and the metatable has
* a __call key pointing to a function, that function is invoked
* (passing any specified arguments) and the return value is
* returned.
*
* __metatable - Hide the metatable. When "getmetatable( myTable )" is
* called, if the metatable for myTable has a __metatable
* key, the value of that key is returned instead of the
* actual metatable.
*
* __tostring - Control string representation. When the builtin
* "tostring( myTable )" function is called, if the metatable
* for myTable has a __tostring property set to a function,
* that function is invoked (passing myTable to it) and the
* return value is used as the string representation.
*
* __len - Control table length. When the table length is requested using
* the length operator ( '#' ), if the metatable for myTable has
* a __len key pointing to a function, that function is invoked
* (passing myTable to it) and the return value used as the value
* of "#myTable".
*
* __gc - Userdata finalizer code. When userdata is set to be garbage
* collected, if the metatable has a __gc field pointing to a
* function, that function is first invoked, passing the userdata
* to it. The __gc metamethod is not called for tables.
* (See http://lua-users.org/lists/lua-l/2006-11/msg00508.html)
*
* Special metamethods for redefining standard operators:
* http://www.lua.org/pil/13.1.html
*
* __add "+"
* __sub "-"
* __mul "*"
* __div "/"
* __unm "!"
* __pow "^"
* __concat ".."
*
* Special methods for redefining standard relations
* http://www.lua.org/pil/13.2.html
*
* __eq "=="
* __lt "<"
* __le "<="
*/
/*
*
*
* Class Map
*
*
*/
/* Returns a struct hlua_map if the stack entry "ud" is
* a class session, otherwise it throws an error.
*/
__LJMP static struct map_descriptor *hlua_checkmap(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_map_ref));
}
/* This function is the map constructor. It don't need
* the class Map object. It creates and return a new Map
* object. It must be called only during "body" or "init"
* context because it process some filesystem accesses.
*/
__LJMP static int hlua_map_new(struct lua_State *L)
{
const char *fn;
int match = PAT_MATCH_STR;
struct sample_conv conv;
const char *file = "";
int line = 0;
lua_Debug ar;
char *err = NULL;
struct arg args[2];
if (lua_gettop(L) < 1 || lua_gettop(L) > 2)
WILL_LJMP(luaL_error(L, "'new' needs at least 1 argument."));
fn = MAY_LJMP(luaL_checkstring(L, 1));
if (lua_gettop(L) >= 2) {
match = MAY_LJMP(luaL_checkinteger(L, 2));
if (match < 0 || match >= PAT_MATCH_NUM)
WILL_LJMP(luaL_error(L, "'new' needs a valid match method."));
}
/* Get Lua filename and line number. */
if (lua_getstack(L, 1, &ar)) { /* check function at level */
lua_getinfo(L, "Sl", &ar); /* get info about it */
if (ar.currentline > 0) { /* is there info? */
file = ar.short_src;
line = ar.currentline;
}
}
/* fill fake sample_conv struct. */
conv.kw = ""; /* unused. */
conv.process = NULL; /* unused. */
conv.arg_mask = 0; /* unused. */
conv.val_args = NULL; /* unused. */
conv.out_type = SMP_T_STR;
conv.private = (void *)(long)match;
switch (match) {
case PAT_MATCH_STR: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_BEG: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_SUB: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_DIR: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_DOM: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_END: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_REG: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_INT: conv.in_type = SMP_T_SINT; break;
case PAT_MATCH_IP: conv.in_type = SMP_T_ADDR; break;
default:
WILL_LJMP(luaL_error(L, "'new' doesn't support this match mode."));
}
/* fill fake args. */
args[0].type = ARGT_STR;
args[0].data.str.area = strdup(fn);
args[0].data.str.data = strlen(fn);
args[0].data.str.size = args[0].data.str.data+1;
args[1].type = ARGT_STOP;
/* load the map. */
if (!sample_load_map(args, &conv, file, line, &err)) {
/* error case: we can't use luaL_error because we must
* free the err variable.
*/
luaL_where(L, 1);
lua_pushfstring(L, "'new': %s.", err);
lua_concat(L, 2);
free(err);
chunk_destroy(&args[0].data.str);
WILL_LJMP(lua_error(L));
}
/* create the lua object. */
lua_newtable(L);
lua_pushlightuserdata(L, args[0].data.map);
lua_rawseti(L, -2, 0);
/* Pop a class Map metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_map_ref);
lua_setmetatable(L, -2);
return 1;
}
__LJMP static inline int _hlua_map_lookup(struct lua_State *L, int str)
{
struct map_descriptor *desc;
struct pattern *pat;
struct sample smp;
MAY_LJMP(check_args(L, 2, "lookup"));
desc = MAY_LJMP(hlua_checkmap(L, 1));
if (desc->pat.expect_type == SMP_T_SINT) {
smp.data.type = SMP_T_SINT;
smp.data.u.sint = MAY_LJMP(luaL_checkinteger(L, 2));
}
else {
smp.data.type = SMP_T_STR;
smp.flags = SMP_F_CONST;
smp.data.u.str.area = (char *)MAY_LJMP(luaL_checklstring(L, 2, (size_t *)&smp.data.u.str.data));
smp.data.u.str.size = smp.data.u.str.data + 1;
}
pat = pattern_exec_match(&desc->pat, &smp, 1);
if (!pat || !pat->data) {
if (str)
lua_pushstring(L, "");
else
lua_pushnil(L);
return 1;
}
/* The Lua pattern must return a string, so we can't check the returned type */
lua_pushlstring(L, pat->data->u.str.area, pat->data->u.str.data);
return 1;
}
__LJMP static int hlua_map_lookup(struct lua_State *L)
{
return _hlua_map_lookup(L, 0);
}
__LJMP static int hlua_map_slookup(struct lua_State *L)
{
return _hlua_map_lookup(L, 1);
}
/*
*
*
* Class Socket
*
*
*/
__LJMP static struct hlua_socket *hlua_checksocket(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_socket_ref));
}
/* This function is the handler called for each I/O on the established
* connection. It is used for notify space available to send or data
* received.
*/
static void hlua_socket_handler(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
if (appctx->ctx.hlua_cosocket.die) {
si_shutw(si);
si_shutr(si);
si_ic(si)->flags |= CF_READ_NULL;
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_read);
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_write);
stream_shutdown(si_strm(si), SF_ERR_KILLED);
}
/* If we can't write, wakeup the pending write signals. */
if (channel_output_closed(si_ic(si)))
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_write);
/* If we can't read, wakeup the pending read signals. */
if (channel_input_closed(si_oc(si)))
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_read);
/* if the connection is not established, inform the stream that we want
* to be notified whenever the connection completes.
*/
if (si_opposite(si)->state < SI_ST_EST) {
si_cant_get(si);
si_rx_conn_blk(si);
si_rx_endp_more(si);
return;
}
/* This function is called after the connect. */
appctx->ctx.hlua_cosocket.connected = 1;
/* Wake the tasks which wants to write if the buffer have available space. */
if (channel_may_recv(si_ic(si)))
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_write);
/* Wake the tasks which wants to read if the buffer contains data. */
if (!channel_is_empty(si_oc(si)))
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_read);
/* Some data were injected in the buffer, notify the stream
* interface.
*/
if (!channel_is_empty(si_ic(si)))
si_update(si);
/* If write notifications are registered, we considers we want
* to write, so we clear the blocking flag.
*/
if (notification_registered(&appctx->ctx.hlua_cosocket.wake_on_write))
si_rx_endp_more(si);
}
/* This function is called when the "struct stream" is destroyed.
* Remove the link from the object to this stream.
* Wake all the pending signals.
*/
static void hlua_socket_release(struct appctx *appctx)
{
struct xref *peer;
/* Remove my link in the original object. */
peer = xref_get_peer_and_lock(&appctx->ctx.hlua_cosocket.xref);
if (peer)
xref_disconnect(&appctx->ctx.hlua_cosocket.xref, peer);
/* Wake all the task waiting for me. */
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_read);
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_write);
}
/* If the garbage collectio of the object is launch, nobody
* uses this object. If the stream does not exists, just quit.
* Send the shutdown signal to the stream. In some cases,
* pending signal can rest in the read and write lists. destroy
* it.
*/
__LJMP static int hlua_socket_gc(lua_State *L)
{
struct hlua_socket *socket;
struct appctx *appctx;
struct xref *peer;
MAY_LJMP(check_args(L, 1, "__gc"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer)
return 0;
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
/* Set the flag which destroy the session. */
appctx->ctx.hlua_cosocket.die = 1;
appctx_wakeup(appctx);
/* Remove all reference between the Lua stack and the coroutine stream. */
xref_disconnect(&socket->xref, peer);
return 0;
}
/* The close function send shutdown signal and break the
* links between the stream and the object.
*/
__LJMP static int hlua_socket_close_helper(lua_State *L)
{
struct hlua_socket *socket;
struct appctx *appctx;
struct xref *peer;
struct hlua *hlua;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua)
return 0;
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer)
return 0;
hlua->gc_count--;
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
/* Set the flag which destroy the session. */
appctx->ctx.hlua_cosocket.die = 1;
appctx_wakeup(appctx);
/* Remove all reference between the Lua stack and the coroutine stream. */
xref_disconnect(&socket->xref, peer);
return 0;
}
/* The close function calls close_helper.
*/
__LJMP static int hlua_socket_close(lua_State *L)
{
MAY_LJMP(check_args(L, 1, "close"));
return hlua_socket_close_helper(L);
}
/* This Lua function assumes that the stack contain three parameters.
* 1 - USERDATA containing a struct socket
* 2 - INTEGER with values of the macro defined below
* If the integer is -1, we must read at most one line.
* If the integer is -2, we ust read all the data until the
* end of the stream.
* If the integer is positive value, we must read a number of
* bytes corresponding to this value.
*/
#define HLSR_READ_LINE (-1)
#define HLSR_READ_ALL (-2)
__LJMP static int hlua_socket_receive_yield(struct lua_State *L, int status, lua_KContext ctx)
{
struct hlua_socket *socket = MAY_LJMP(hlua_checksocket(L, 1));
int wanted = lua_tointeger(L, 2);
struct hlua *hlua;
struct appctx *appctx;
size_t len;
int nblk;
const char *blk1;
size_t len1;
const char *blk2;
size_t len2;
int skip_at_end = 0;
struct channel *oc;
struct stream_interface *si;
struct stream *s;
struct xref *peer;
int missing_bytes;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
/* Check if this lua stack is schedulable. */
if (!hlua || !hlua->task)
WILL_LJMP(luaL_error(L, "The 'receive' function is only allowed in "
"'frontend', 'backend' or 'task'"));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer)
goto no_peer;
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
oc = &s->res;
if (wanted == HLSR_READ_LINE) {
/* Read line. */
nblk = co_getline_nc(oc, &blk1, &len1, &blk2, &len2);
if (nblk < 0) /* Connection close. */
goto connection_closed;
if (nblk == 0) /* No data available. */
goto connection_empty;
/* remove final \r\n. */
if (nblk == 1) {
if (blk1[len1-1] == '\n') {
len1--;
skip_at_end++;
if (blk1[len1-1] == '\r') {
len1--;
skip_at_end++;
}
}
}
else {
if (blk2[len2-1] == '\n') {
len2--;
skip_at_end++;
if (blk2[len2-1] == '\r') {
len2--;
skip_at_end++;
}
}
}
}
else if (wanted == HLSR_READ_ALL) {
/* Read all the available data. */
nblk = co_getblk_nc(oc, &blk1, &len1, &blk2, &len2);
if (nblk < 0) /* Connection close. */
goto connection_closed;
if (nblk == 0) /* No data available. */
goto connection_empty;
}
else {
/* Read a block of data. */
nblk = co_getblk_nc(oc, &blk1, &len1, &blk2, &len2);
if (nblk < 0) /* Connection close. */
goto connection_closed;
if (nblk == 0) /* No data available. */
goto connection_empty;
missing_bytes = wanted - socket->b.n;
if (len1 > missing_bytes) {
nblk = 1;
len1 = missing_bytes;
} if (nblk == 2 && len1 + len2 > missing_bytes)
len2 = missing_bytes - len1;
}
len = len1;
luaL_addlstring(&socket->b, blk1, len1);
if (nblk == 2) {
len += len2;
luaL_addlstring(&socket->b, blk2, len2);
}
/* Consume data. */
co_skip(oc, len + skip_at_end);
/* Don't wait anything. */
appctx_wakeup(appctx);
/* If the pattern reclaim to read all the data
* in the connection, got out.
*/
if (wanted == HLSR_READ_ALL)
goto connection_empty;
else if (wanted >= 0 && socket->b.n < wanted)
goto connection_empty;
/* Return result. */
luaL_pushresult(&socket->b);
xref_unlock(&socket->xref, peer);
return 1;
connection_closed:
xref_unlock(&socket->xref, peer);
no_peer:
/* If the buffer containds data. */
if (socket->b.n > 0) {
luaL_pushresult(&socket->b);
return 1;
}
lua_pushnil(L);
lua_pushstring(L, "connection closed.");
return 2;
connection_empty:
if (!notification_new(&hlua->com, &appctx->ctx.hlua_cosocket.wake_on_read, hlua->task)) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "out of memory"));
}
xref_unlock(&socket->xref, peer);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_socket_receive_yield, TICK_ETERNITY, 0));
return 0;
}
/* This Lua function gets two parameters. The first one can be string
* or a number. If the string is "*l", the user requires one line. If
* the string is "*a", the user requires all the contents of the stream.
* If the value is a number, the user require a number of bytes equal
* to the value. The default value is "*l" (a line).
*
* This parameter with a variable type is converted in integer. This
* integer takes this values:
* -1 : read a line
* -2 : read all the stream
* >0 : amount of bytes.
*
* The second parameter is optional. It contains a string that must be
* concatenated with the read data.
*/
__LJMP static int hlua_socket_receive(struct lua_State *L)
{
int wanted = HLSR_READ_LINE;
const char *pattern;
int lastarg, type;
char *error;
size_t len;
struct hlua_socket *socket;
if (lua_gettop(L) < 1 || lua_gettop(L) > 3)
WILL_LJMP(luaL_error(L, "The 'receive' function requires between 1 and 3 arguments."));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for pattern. */
if (lua_gettop(L) >= 2) {
type = lua_type(L, 2);
if (type == LUA_TSTRING) {
pattern = lua_tostring(L, 2);
if (strcmp(pattern, "*a") == 0)
wanted = HLSR_READ_ALL;
else if (strcmp(pattern, "*l") == 0)
wanted = HLSR_READ_LINE;
else {
wanted = strtoll(pattern, &error, 10);
if (*error != '\0')
WILL_LJMP(luaL_error(L, "Unsupported pattern."));
}
}
else if (type == LUA_TNUMBER) {
wanted = lua_tointeger(L, 2);
if (wanted < 0)
WILL_LJMP(luaL_error(L, "Unsupported size."));
}
}
/* Set pattern. */
lua_pushinteger(L, wanted);
/* Check if we would replace the top by itself. */
if (lua_gettop(L) != 2)
lua_replace(L, 2);
/* Save index of the top of the stack because since buffers are used, it
* may change
*/
lastarg = lua_gettop(L);
/* init buffer, and fill it with prefix. */
luaL_buffinit(L, &socket->b);
/* Check prefix. */
if (lastarg >= 3) {
if (lua_type(L, 3) != LUA_TSTRING)
WILL_LJMP(luaL_error(L, "Expect a 'string' for the prefix"));
pattern = lua_tolstring(L, 3, &len);
luaL_addlstring(&socket->b, pattern, len);
}
return __LJMP(hlua_socket_receive_yield(L, 0, 0));
}
/* Write the Lua input string in the output buffer.
* This function returns a yield if no space is available.
*/
static int hlua_socket_write_yield(struct lua_State *L,int status, lua_KContext ctx)
{
struct hlua_socket *socket;
struct hlua *hlua;
struct appctx *appctx;
size_t buf_len;
const char *buf;
int len;
int send_len;
int sent;
struct xref *peer;
struct stream_interface *si;
struct stream *s;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
/* Check if this lua stack is schedulable. */
if (!hlua || !hlua->task)
WILL_LJMP(luaL_error(L, "The 'write' function is only allowed in "
"'frontend', 'backend' or 'task'"));
/* Get object */
socket = MAY_LJMP(hlua_checksocket(L, 1));
buf = MAY_LJMP(luaL_checklstring(L, 2, &buf_len));
sent = MAY_LJMP(luaL_checkinteger(L, 3));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushinteger(L, -1);
return 1;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
/* Check for connection close. */
if (channel_output_closed(&s->req)) {
xref_unlock(&socket->xref, peer);
lua_pushinteger(L, -1);
return 1;
}
/* Update the input buffer data. */
buf += sent;
send_len = buf_len - sent;
/* All the data are sent. */
if (sent >= buf_len) {
xref_unlock(&socket->xref, peer);
return 1; /* Implicitly return the length sent. */
}
/* Check if the buffer is available because HAProxy doesn't allocate
* the request buffer if its not required.
*/
if (s->req.buf.size == 0) {
if (!si_alloc_ibuf(si, &appctx->buffer_wait))
goto hlua_socket_write_yield_return;
}
/* Check for available space. */
len = b_room(&s->req.buf);
if (len <= 0) {
goto hlua_socket_write_yield_return;
}
/* send data */
if (len < send_len)
send_len = len;
len = ci_putblk(&s->req, buf, send_len);
/* "Not enough space" (-1), "Buffer too little to contain
* the data" (-2) are not expected because the available length
* is tested.
* Other unknown error are also not expected.
*/
if (len <= 0) {
if (len == -1)
s->req.flags |= CF_WAKE_WRITE;
MAY_LJMP(hlua_socket_close_helper(L));
lua_pop(L, 1);
lua_pushinteger(L, -1);
xref_unlock(&socket->xref, peer);
return 1;
}
/* update buffers. */
appctx_wakeup(appctx);
s->req.rex = TICK_ETERNITY;
s->res.wex = TICK_ETERNITY;
/* Update length sent. */
lua_pop(L, 1);
lua_pushinteger(L, sent + len);
/* All the data buffer is sent ? */
if (sent + len >= buf_len) {
xref_unlock(&socket->xref, peer);
return 1;
}
hlua_socket_write_yield_return:
if (!notification_new(&hlua->com, &appctx->ctx.hlua_cosocket.wake_on_write, hlua->task)) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "out of memory"));
}
xref_unlock(&socket->xref, peer);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_socket_write_yield, TICK_ETERNITY, 0));
return 0;
}
/* This function initiate the send of data. It just check the input
* parameters and push an integer in the Lua stack that contain the
* amount of data written to the buffer. This is used by the function
* "hlua_socket_write_yield" that can yield.
*
* The Lua function gets between 3 and 4 parameters. The first one is
* the associated object. The second is a string buffer. The third is
* a facultative integer that represents where is the buffer position
* of the start of the data that can send. The first byte is the
* position "1". The default value is "1". The fourth argument is a
* facultative integer that represents where is the buffer position
* of the end of the data that can send. The default is the last byte.
*/
static int hlua_socket_send(struct lua_State *L)
{
int i;
int j;
const char *buf;
size_t buf_len;
/* Check number of arguments. */
if (lua_gettop(L) < 2 || lua_gettop(L) > 4)
WILL_LJMP(luaL_error(L, "'send' needs between 2 and 4 arguments"));
/* Get the string. */
buf = MAY_LJMP(luaL_checklstring(L, 2, &buf_len));
/* Get and check j. */
if (lua_gettop(L) == 4) {
j = MAY_LJMP(luaL_checkinteger(L, 4));
if (j < 0)
j = buf_len + j + 1;
if (j > buf_len)
j = buf_len + 1;
lua_pop(L, 1);
}
else
j = buf_len;
/* Get and check i. */
if (lua_gettop(L) == 3) {
i = MAY_LJMP(luaL_checkinteger(L, 3));
if (i < 0)
i = buf_len + i + 1;
if (i > buf_len)
i = buf_len + 1;
lua_pop(L, 1);
} else
i = 1;
/* Check bth i and j. */
if (i > j) {
lua_pushinteger(L, 0);
return 1;
}
if (i == 0 && j == 0) {
lua_pushinteger(L, 0);
return 1;
}
if (i == 0)
i = 1;
if (j == 0)
j = 1;
/* Pop the string. */
lua_pop(L, 1);
/* Update the buffer length. */
buf += i - 1;
buf_len = j - i + 1;
lua_pushlstring(L, buf, buf_len);
/* This unsigned is used to remember the amount of sent data. */
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_socket_write_yield(L, 0, 0));
}
#define SOCKET_INFO_MAX_LEN sizeof("[0000:0000:0000:0000:0000:0000:0000:0000]:12345")
__LJMP static inline int hlua_socket_info(struct lua_State *L, struct sockaddr_storage *addr)
{
static char buffer[SOCKET_INFO_MAX_LEN];
int ret;
int len;
char *p;
ret = addr_to_str(addr, buffer+1, SOCKET_INFO_MAX_LEN-1);
if (ret <= 0) {
lua_pushnil(L);
return 1;
}
if (ret == AF_UNIX) {
lua_pushstring(L, buffer+1);
return 1;
}
else if (ret == AF_INET6) {
buffer[0] = '[';
len = strlen(buffer);
buffer[len] = ']';
len++;
buffer[len] = ':';
len++;
p = buffer;
}
else if (ret == AF_INET) {
p = buffer + 1;
len = strlen(p);
p[len] = ':';
len++;
}
else {
lua_pushnil(L);
return 1;
}
if (port_to_str(addr, p + len, SOCKET_INFO_MAX_LEN-1 - len) <= 0) {
lua_pushnil(L);
return 1;
}
lua_pushstring(L, p);
return 1;
}
/* Returns information about the peer of the connection. */
__LJMP static int hlua_socket_getpeername(struct lua_State *L)
{
struct hlua_socket *socket;
struct xref *peer;
struct appctx *appctx;
struct stream_interface *si;
struct stream *s;
int ret;
MAY_LJMP(check_args(L, 1, "getpeername"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
return 1;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
if (!s->target_addr) {
xref_unlock(&socket->xref, peer);
lua_pushnil(L);
return 1;
}
ret = MAY_LJMP(hlua_socket_info(L, s->target_addr));
xref_unlock(&socket->xref, peer);
return ret;
}
/* Returns information about my connection side. */
static int hlua_socket_getsockname(struct lua_State *L)
{
struct hlua_socket *socket;
struct connection *conn;
struct appctx *appctx;
struct xref *peer;
struct stream_interface *si;
struct stream *s;
int ret;
MAY_LJMP(check_args(L, 1, "getsockname"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
return 1;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
conn = cs_conn(objt_cs(s->si[1].end));
if (!conn || !conn_get_src(conn)) {
xref_unlock(&socket->xref, peer);
lua_pushnil(L);
return 1;
}
ret = hlua_socket_info(L, conn->src);
xref_unlock(&socket->xref, peer);
return ret;
}
/* This struct define the applet. */
static struct applet update_applet = {
.obj_type = OBJ_TYPE_APPLET,
.name = "<LUA_TCP>",
.fct = hlua_socket_handler,
.release = hlua_socket_release,
};
__LJMP static int hlua_socket_connect_yield(struct lua_State *L, int status, lua_KContext ctx)
{
struct hlua_socket *socket = MAY_LJMP(hlua_checksocket(L, 1));
struct hlua *hlua;
struct xref *peer;
struct appctx *appctx;
struct stream_interface *si;
struct stream *s;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua)
return 0;
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
lua_pushstring(L, "Can't connect");
return 2;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
}
/* Check for connection close. */
if (!hlua || channel_output_closed(&s->req)) {
xref_unlock(&socket->xref, peer);
lua_pushnil(L);
lua_pushstring(L, "Can't connect");
return 2;
}
appctx = __objt_appctx(s->si[0].end);
/* Check for connection established. */
if (appctx->ctx.hlua_cosocket.connected) {
xref_unlock(&socket->xref, peer);
lua_pushinteger(L, 1);
return 1;
}
if (!notification_new(&hlua->com, &appctx->ctx.hlua_cosocket.wake_on_write, hlua->task)) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "out of memory error"));
}
xref_unlock(&socket->xref, peer);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_socket_connect_yield, TICK_ETERNITY, 0));
return 0;
}
/* This function fail or initite the connection. */
__LJMP static int hlua_socket_connect(struct lua_State *L)
{
struct hlua_socket *socket;
int port = -1;
const char *ip;
struct hlua *hlua;
struct appctx *appctx;
int low, high;
struct sockaddr_storage *addr;
struct xref *peer;
struct stream_interface *si;
struct stream *s;
if (lua_gettop(L) < 2)
WILL_LJMP(luaL_error(L, "connect: need at least 2 arguments"));
/* Get args. */
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
ip = MAY_LJMP(luaL_checkstring(L, 2));
if (lua_gettop(L) >= 3) {
luaL_Buffer b;
port = MAY_LJMP(luaL_checkinteger(L, 3));
/* Force the ip to end with a colon, to support IPv6 addresses
* that are not enclosed within square brackets.
*/
if (port > 0) {
luaL_buffinit(L, &b);
luaL_addstring(&b, ip);
luaL_addchar(&b, ':');
luaL_pushresult(&b);
ip = lua_tolstring(L, lua_gettop(L), NULL);
}
}
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
return 1;
}
/* Parse ip address. */
addr = str2sa_range(ip, NULL, &low, &high, NULL, NULL, NULL, NULL, NULL, PA_O_PORT_OK | PA_O_STREAM);
if (!addr) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: cannot parse destination address '%s'", ip));
}
/* Set port. */
if (low == 0) {
if (addr->ss_family == AF_INET) {
if (port == -1) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: port missing"));
}
((struct sockaddr_in *)addr)->sin_port = htons(port);
} else if (addr->ss_family == AF_INET6) {
if (port == -1) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: port missing"));
}
((struct sockaddr_in6 *)addr)->sin6_port = htons(port);
}
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
if (!sockaddr_alloc(&s->target_addr, addr, sizeof(*addr))) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: internal error"));
}
s->flags |= SF_ADDR_SET;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua)
return 0;
/* inform the stream that we want to be notified whenever the
* connection completes.
*/
si_cant_get(&s->si[0]);
si_rx_endp_more(&s->si[0]);
appctx_wakeup(appctx);
hlua->gc_count++;
if (!notification_new(&hlua->com, &appctx->ctx.hlua_cosocket.wake_on_write, hlua->task)) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "out of memory"));
}
xref_unlock(&socket->xref, peer);
task_wakeup(s->task, TASK_WOKEN_INIT);
/* Return yield waiting for connection. */
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_socket_connect_yield, TICK_ETERNITY, 0));
return 0;
}
#ifdef USE_OPENSSL
__LJMP static int hlua_socket_connect_ssl(struct lua_State *L)
{
struct hlua_socket *socket;
struct xref *peer;
struct appctx *appctx;
struct stream_interface *si;
struct stream *s;
MAY_LJMP(check_args(L, 3, "connect_ssl"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
return 1;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
s->target = &socket_ssl->obj_type;
xref_unlock(&socket->xref, peer);
return MAY_LJMP(hlua_socket_connect(L));
}
#endif
__LJMP static int hlua_socket_setoption(struct lua_State *L)
{
return 0;
}
__LJMP static int hlua_socket_settimeout(struct lua_State *L)
{
struct hlua_socket *socket;
int tmout;
double dtmout;
struct xref *peer;
struct appctx *appctx;
struct stream_interface *si;
struct stream *s;
MAY_LJMP(check_args(L, 2, "settimeout"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* convert the timeout to millis */
dtmout = MAY_LJMP(luaL_checknumber(L, 2)) * 1000;
/* Check for negative values */
if (dtmout < 0)
WILL_LJMP(luaL_error(L, "settimeout: cannot set negatives values"));
if (dtmout > INT_MAX) /* overflow check */
WILL_LJMP(luaL_error(L, "settimeout: cannot set values larger than %d ms", INT_MAX));
tmout = MS_TO_TICKS((int)dtmout);
if (tmout == 0)
tmout++; /* very small timeouts are adjusted to a minimum of 1ms */
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data were read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
hlua_pusherror(L, "socket: not yet initialised, you can't set timeouts.");
WILL_LJMP(lua_error(L));
return 0;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
s->sess->fe->timeout.connect = tmout;
s->req.rto = tmout;
s->req.wto = tmout;
s->res.rto = tmout;
s->res.wto = tmout;
s->req.rex = tick_add_ifset(now_ms, tmout);
s->req.wex = tick_add_ifset(now_ms, tmout);
s->res.rex = tick_add_ifset(now_ms, tmout);
s->res.wex = tick_add_ifset(now_ms, tmout);
s->task->expire = tick_add_ifset(now_ms, tmout);
task_queue(s->task);
xref_unlock(&socket->xref, peer);
lua_pushinteger(L, 1);
return 1;
}
__LJMP static int hlua_socket_new(lua_State *L)
{
struct hlua_socket *socket;
struct appctx *appctx;
struct session *sess;
struct stream *strm;
/* Check stack size. */
if (!lua_checkstack(L, 3)) {
hlua_pusherror(L, "socket: full stack");
goto out_fail_conf;
}
/* Create the object: obj[0] = userdata. */
lua_newtable(L);
socket = MAY_LJMP(lua_newuserdata(L, sizeof(*socket)));
lua_rawseti(L, -2, 0);
memset(socket, 0, sizeof(*socket));
socket->tid = tid;
/* Check if the various memory pools are initialized. */
if (!pool_head_stream || !pool_head_buffer) {
hlua_pusherror(L, "socket: uninitialized pools.");
goto out_fail_conf;
}
/* Pop a class stream metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_socket_ref);
lua_setmetatable(L, -2);
/* Create the applet context */
appctx = appctx_new(&update_applet, tid_bit);
if (!appctx) {
hlua_pusherror(L, "socket: out of memory");
goto out_fail_conf;
}
appctx->ctx.hlua_cosocket.connected = 0;
appctx->ctx.hlua_cosocket.die = 0;
LIST_INIT(&appctx->ctx.hlua_cosocket.wake_on_write);
LIST_INIT(&appctx->ctx.hlua_cosocket.wake_on_read);
/* Now create a session, task and stream for this applet */
sess = session_new(socket_proxy, NULL, &appctx->obj_type);
if (!sess) {
hlua_pusherror(L, "socket: out of memory");
goto out_fail_sess;
}
strm = stream_new(sess, &appctx->obj_type, &BUF_NULL);
if (!strm) {
hlua_pusherror(L, "socket: out of memory");
goto out_fail_stream;
}
/* Initialise cross reference between stream and Lua socket object. */
xref_create(&socket->xref, &appctx->ctx.hlua_cosocket.xref);
/* Configure "right" stream interface. this "si" is used to connect
* and retrieve data from the server. The connection is initialized
* with the "struct server".
*/
si_set_state(&strm->si[1], SI_ST_ASS);
/* Force destination server. */
strm->flags |= SF_DIRECT | SF_ASSIGNED | SF_BE_ASSIGNED;
strm->target = &socket_tcp->obj_type;
return 1;
out_fail_stream:
session_free(sess);
out_fail_sess:
appctx_free(appctx);
out_fail_conf:
WILL_LJMP(lua_error(L));
return 0;
}
/*
*
*
* Class Channel
*
*
*/
/* Returns the struct hlua_channel join to the class channel in the
* stack entry "ud" or throws an argument error.
*/
__LJMP static struct channel *hlua_checkchannel(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_channel_ref));
}
/* Pushes the channel onto the top of the stack. If the stask does not have a
* free slots, the function fails and returns 0;
*/
static int hlua_channel_new(lua_State *L, struct channel *channel)
{
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
lua_newtable(L);
lua_pushlightuserdata(L, channel);
lua_rawseti(L, -2, 0);
/* Pop a class sesison metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_channel_ref);
lua_setmetatable(L, -2);
return 1;
}
/* Duplicate all the data present in the input channel and put it
* in a string LUA variables. Returns -1 and push a nil value in
* the stack if the channel is closed and all the data are consumed,
* returns 0 if no data are available, otherwise it returns the length
* of the built string.
*/
static inline int _hlua_channel_dup(struct channel *chn, lua_State *L)
{
char *blk1;
char *blk2;
size_t len1;
size_t len2;
int ret;
luaL_Buffer b;
ret = ci_getblk_nc(chn, &blk1, &len1, &blk2, &len2);
if (unlikely(ret == 0))
return 0;
if (unlikely(ret < 0)) {
lua_pushnil(L);
return -1;
}
luaL_buffinit(L, &b);
luaL_addlstring(&b, blk1, len1);
if (unlikely(ret == 2))
luaL_addlstring(&b, blk2, len2);
luaL_pushresult(&b);
if (unlikely(ret == 2))
return len1 + len2;
return len1;
}
/* "_hlua_channel_dup" wrapper. If no data are available, it returns
* a yield. This function keep the data in the buffer.
*/
__LJMP static int hlua_channel_dup_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn;
chn = MAY_LJMP(hlua_checkchannel(L, 1));
if (IS_HTX_STRM(chn_strm(chn))) {
lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
WILL_LJMP(lua_error(L));
}
if (_hlua_channel_dup(chn, L) == 0)
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_dup_yield, TICK_ETERNITY, 0));
return 1;
}
/* Check arguments for the function "hlua_channel_dup_yield". */
__LJMP static int hlua_channel_dup(lua_State *L)
{
MAY_LJMP(check_args(L, 1, "dup"));
MAY_LJMP(hlua_checkchannel(L, 1));
return MAY_LJMP(hlua_channel_dup_yield(L, 0, 0));
}
/* "_hlua_channel_dup" wrapper. If no data are available, it returns
* a yield. This function consumes the data in the buffer. It returns
* a string containing the data or a nil pointer if no data are available
* and the channel is closed.
*/
__LJMP static int hlua_channel_get_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn;
int ret;
chn = MAY_LJMP(hlua_checkchannel(L, 1));
if (IS_HTX_STRM(chn_strm(chn))) {
lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
WILL_LJMP(lua_error(L));
}
ret = _hlua_channel_dup(chn, L);
if (unlikely(ret == 0))
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_get_yield, TICK_ETERNITY, 0));
if (unlikely(ret == -1))
return 1;
b_sub(&chn->buf, ret);
return 1;
}
/* Check arguments for the function "hlua_channel_get_yield". */
__LJMP static int hlua_channel_get(lua_State *L)
{
MAY_LJMP(check_args(L, 1, "get"));
MAY_LJMP(hlua_checkchannel(L, 1));
return MAY_LJMP(hlua_channel_get_yield(L, 0, 0));
}
/* This functions consumes and returns one line. If the channel is closed,
* and the last data does not contains a final '\n', the data are returned
* without the final '\n'. When no more data are available, it returns nil
* value.
*/
__LJMP static int hlua_channel_getline_yield(lua_State *L, int status, lua_KContext ctx)
{
char *blk1;
char *blk2;
size_t len1;
size_t len2;
size_t len;
struct channel *chn;
int ret;
luaL_Buffer b;
chn = MAY_LJMP(hlua_checkchannel(L, 1));
if (IS_HTX_STRM(chn_strm(chn))) {
lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
WILL_LJMP(lua_error(L));
}
ret = ci_getline_nc(chn, &blk1, &len1, &blk2, &len2);
if (ret == 0)
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_getline_yield, TICK_ETERNITY, 0));
if (ret == -1) {
lua_pushnil(L);
return 1;
}
luaL_buffinit(L, &b);
luaL_addlstring(&b, blk1, len1);
len = len1;
if (unlikely(ret == 2)) {
luaL_addlstring(&b, blk2, len2);
len += len2;
}
luaL_pushresult(&b);
b_rep_blk(&chn->buf, ci_head(chn), ci_head(chn) + len, NULL, 0);
return 1;
}
/* Check arguments for the function "hlua_channel_getline_yield". */
__LJMP static int hlua_channel_getline(lua_State *L)
{
MAY_LJMP(check_args(L, 1, "getline"));
MAY_LJMP(hlua_checkchannel(L, 1));
return MAY_LJMP(hlua_channel_getline_yield(L, 0, 0));
}
/* This function takes a string as input, and append it at the
* input side of channel. If the data is too big, but a space
* is probably available after sending some data, the function
* yields. If the data is bigger than the buffer, or if the
* channel is closed, it returns -1. Otherwise, it returns the
* amount of data written.
*/
__LJMP static int hlua_channel_append_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn = MAY_LJMP(hlua_checkchannel(L, 1));
size_t len;
const char *str = MAY_LJMP(luaL_checklstring(L, 2, &len));
int l = MAY_LJMP(luaL_checkinteger(L, 3));
int ret;
int max;
if (IS_HTX_STRM(chn_strm(chn))) {
lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
WILL_LJMP(lua_error(L));
}
/* Check if the buffer is available because HAProxy doesn't allocate
* the request buffer if its not required.
*/
if (chn->buf.size == 0) {
si_rx_buff_blk(chn_prod(chn));
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_append_yield, TICK_ETERNITY, 0));
}
max = channel_recv_limit(chn) - b_data(&chn->buf);
if (max > len - l)
max = len - l;
ret = ci_putblk(chn, str + l, max);
if (ret == -2 || ret == -3) {
lua_pushinteger(L, -1);
return 1;
}
if (ret == -1) {
chn->flags |= CF_WAKE_WRITE;
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_append_yield, TICK_ETERNITY, 0));
}
l += ret;
lua_pop(L, 1);
lua_pushinteger(L, l);
max = channel_recv_limit(chn) - b_data(&chn->buf);
if (max == 0 && co_data(chn) == 0) {
/* There are no space available, and the output buffer is empty.
* in this case, we cannot add more data, so we cannot yield,
* we return the amount of copied data.
*/
return 1;
}
if (l < len)
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_append_yield, TICK_ETERNITY, 0));
return 1;
}
/* Just a wrapper of "hlua_channel_append_yield". It returns the length
* of the written string, or -1 if the channel is closed or if the
* buffer size is too little for the data.
*/
__LJMP static int hlua_channel_append(lua_State *L)
{
size_t len;
MAY_LJMP(check_args(L, 2, "append"));
MAY_LJMP(hlua_checkchannel(L, 1));
MAY_LJMP(luaL_checklstring(L, 2, &len));
MAY_LJMP(luaL_checkinteger(L, 3));
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_channel_append_yield(L, 0, 0));
}
/* Just a wrapper of "hlua_channel_append_yield". This wrapper starts
* his process by cleaning the buffer. The result is a replacement
* of the current data. It returns the length of the written string,
* or -1 if the channel is closed or if the buffer size is too
* little for the data.
*/
__LJMP static int hlua_channel_set(lua_State *L)
{
struct channel *chn;
MAY_LJMP(check_args(L, 2, "set"));
chn = MAY_LJMP(hlua_checkchannel(L, 1));
lua_pushinteger(L, 0);
if (IS_HTX_STRM(chn_strm(chn))) {
lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
WILL_LJMP(lua_error(L));
}
b_set_data(&chn->buf, co_data(chn));
return MAY_LJMP(hlua_channel_append_yield(L, 0, 0));
}
/* Append data in the output side of the buffer. This data is immediately
* sent. The function returns the amount of data written. If the buffer
* cannot contain the data, the function yields. The function returns -1
* if the channel is closed.
*/
__LJMP static int hlua_channel_send_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn = MAY_LJMP(hlua_checkchannel(L, 1));
size_t len;
const char *str = MAY_LJMP(luaL_checklstring(L, 2, &len));
int l = MAY_LJMP(luaL_checkinteger(L, 3));
int max;
struct hlua *hlua;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua) {
lua_pushnil(L);
return 1;
}
if (IS_HTX_STRM(chn_strm(chn))) {
lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
WILL_LJMP(lua_error(L));
}
if (unlikely(channel_output_closed(chn))) {
lua_pushinteger(L, -1);
return 1;
}
/* Check if the buffer is available because HAProxy doesn't allocate
* the request buffer if its not required.
*/
if (chn->buf.size == 0) {
si_rx_buff_blk(chn_prod(chn));
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_send_yield, TICK_ETERNITY, 0));
}
/* The written data will be immediately sent, so we can check
* the available space without taking in account the reserve.
* The reserve is guaranteed for the processing of incoming
* data, because the buffer will be flushed.
*/
max = b_room(&chn->buf);
/* If there is no space available, and the output buffer is empty.
* in this case, we cannot add more data, so we cannot yield,
* we return the amount of copied data.
*/
if (max == 0 && co_data(chn) == 0)
return 1;
/* Adjust the real required length. */
if (max > len - l)
max = len - l;
/* The buffer available size may be not contiguous. This test
* detects a non contiguous buffer and realign it.
*/
if (ci_space_for_replace(chn) < max)
channel_slow_realign(chn, trash.area);
/* Copy input data in the buffer. */
max = b_rep_blk(&chn->buf, ci_head(chn), ci_head(chn), str + l, max);
/* buffer replace considers that the input part is filled.
* so, I must forward these new data in the output part.
*/
c_adv(chn, max);
l += max;
lua_pop(L, 1);
lua_pushinteger(L, l);
/* If there is no space available, and the output buffer is empty.
* in this case, we cannot add more data, so we cannot yield,
* we return the amount of copied data.
*/
max = b_room(&chn->buf);
if (max == 0 && co_data(chn) == 0)
return 1;
if (l < len) {
/* If we are waiting for space in the response buffer, we
* must set the flag WAKERESWR. This flag required the task
* wake up if any activity is detected on the response buffer.
*/
if (chn->flags & CF_ISRESP)
HLUA_SET_WAKERESWR(hlua);
else
HLUA_SET_WAKEREQWR(hlua);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_send_yield, TICK_ETERNITY, 0));
}
return 1;
}
/* Just a wrapper of "_hlua_channel_send". This wrapper permits
* yield the LUA process, and resume it without checking the
* input arguments.
*/
__LJMP static int hlua_channel_send(lua_State *L)
{
MAY_LJMP(check_args(L, 2, "send"));
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_channel_send_yield(L, 0, 0));
}
/* This function forward and amount of butes. The data pass from
* the input side of the buffer to the output side, and can be
* forwarded. This function never fails.
*
* The Lua function takes an amount of bytes to be forwarded in
* input. It returns the number of bytes forwarded.
*/
__LJMP static int hlua_channel_forward_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn;
int len;
int l;
int max;
struct hlua *hlua;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua)
return 1;
chn = MAY_LJMP(hlua_checkchannel(L, 1));
if (IS_HTX_STRM(chn_strm(chn))) {
lua_pushfstring(L, "Cannot manipulate HAProxy channels in HTTP mode.");
WILL_LJMP(lua_error(L));
}
len = MAY_LJMP(luaL_checkinteger(L, 2));
l = MAY_LJMP(luaL_checkinteger(L, -1));
max = len - l;
if (max > ci_data(chn))
max = ci_data(chn);
channel_forward(chn, max);
l += max;
lua_pop(L, 1);
lua_pushinteger(L, l);
/* Check if it miss bytes to forward. */
if (l < len) {
/* The the input channel or the output channel are closed, we
* must return the amount of data forwarded.
*/
if (channel_input_closed(chn) || channel_output_closed(chn))
return 1;
/* If we are waiting for space data in the response buffer, we
* must set the flag WAKERESWR. This flag required the task
* wake up if any activity is detected on the response buffer.
*/
if (chn->flags & CF_ISRESP)
HLUA_SET_WAKERESWR(hlua);
else
HLUA_SET_WAKEREQWR(hlua);
/* Otherwise, we can yield waiting for new data in the inpout side. */
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_forward_yield, TICK_ETERNITY, 0));
}
return 1;
}
/* Just check the input and prepare the stack for the previous
* function "hlua_channel_forward_yield"
*/
__LJMP static int hlua_channel_forward(lua_State *L)
{
MAY_LJMP(check_args(L, 2, "forward"));
MAY_LJMP(hlua_checkchannel(L, 1));
MAY_LJMP(luaL_checkinteger(L, 2));
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_channel_forward_yield(L, 0, 0));
}
/* Just returns the number of bytes available in the input
* side of the buffer. This function never fails.
*/
__LJMP static int hlua_channel_get_in_len(lua_State *L)
{
struct channel *chn;
MAY_LJMP(check_args(L, 1, "get_in_len"));
chn = MAY_LJMP(hlua_checkchannel(L, 1));
if (IS_HTX_STRM(chn_strm(chn))) {
struct htx *htx = htxbuf(&chn->buf);
lua_pushinteger(L, htx->data - co_data(chn));
}
else
lua_pushinteger(L, ci_data(chn));
return 1;
}
/* Returns true if the channel is full. */
__LJMP static int hlua_channel_is_full(lua_State *L)
{
struct channel *chn;
MAY_LJMP(check_args(L, 1, "is_full"));
chn = MAY_LJMP(hlua_checkchannel(L, 1));
/* ignore the reserve, we are not on a producer side (ie in an
* applet).
*/
lua_pushboolean(L, channel_full(chn, 0));
return 1;
}
/* Returns true if the channel is the response channel. */
__LJMP static int hlua_channel_is_resp(lua_State *L)
{
struct channel *chn;
MAY_LJMP(check_args(L, 1, "is_resp"));
chn = MAY_LJMP(hlua_checkchannel(L, 1));
lua_pushboolean(L, !!(chn->flags & CF_ISRESP));
return 1;
}
/* Just returns the number of bytes available in the output
* side of the buffer. This function never fails.
*/
__LJMP static int hlua_channel_get_out_len(lua_State *L)
{
struct channel *chn;
MAY_LJMP(check_args(L, 1, "get_out_len"));
chn = MAY_LJMP(hlua_checkchannel(L, 1));
lua_pushinteger(L, co_data(chn));
return 1;
}
/*
*
*
* Class Fetches
*
*
*/
/* Returns a struct hlua_session if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_smp *hlua_checkfetches(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_fetches_ref));
}
/* This function creates and push in the stack a fetch object according
* with a current TXN.
*/
static int hlua_fetches_new(lua_State *L, struct hlua_txn *txn, unsigned int flags)
{
struct hlua_smp *hsmp;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Fetches object is the
* transaction object.
*/
lua_newtable(L);
hsmp = lua_newuserdata(L, sizeof(*hsmp));
lua_rawseti(L, -2, 0);
hsmp->s = txn->s;
hsmp->p = txn->p;
hsmp->dir = txn->dir;
hsmp->flags = flags;
/* Pop a class sesison metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_fetches_ref);
lua_setmetatable(L, -2);
return 1;
}
/* This function is an LUA binding. It is called with each sample-fetch.
* It uses closure argument to store the associated sample-fetch. It
* returns only one argument or throws an error. An error is thrown
* only if an error is encountered during the argument parsing. If
* the "sample-fetch" function fails, nil is returned.
*/
__LJMP static int hlua_run_sample_fetch(lua_State *L)
{
struct hlua_smp *hsmp;
struct sample_fetch *f;
struct arg args[ARGM_NBARGS + 1] = {{0}};
int i;
struct sample smp;
/* Get closure arguments. */
f = lua_touserdata(L, lua_upvalueindex(1));
/* Get traditional arguments. */
hsmp = MAY_LJMP(hlua_checkfetches(L, 1));
/* Check execution authorization. */
if (f->use & SMP_USE_HTTP_ANY &&
!(hsmp->flags & HLUA_F_MAY_USE_HTTP)) {
lua_pushfstring(L, "the sample-fetch '%s' needs an HTTP parser which "
"is not available in Lua services", f->kw);
WILL_LJMP(lua_error(L));
}
/* Get extra arguments. */
for (i = 0; i < lua_gettop(L) - 1; i++) {
if (i >= ARGM_NBARGS)
break;
hlua_lua2arg(L, i + 2, &args[i]);
}
args[i].type = ARGT_STOP;
args[i].data.str.area = NULL;
/* Check arguments. */
MAY_LJMP(hlua_lua2arg_check(L, 2, args, f->arg_mask, hsmp->p));
/* Run the special args checker. */
if (f->val_args && !f->val_args(args, NULL)) {
lua_pushfstring(L, "error in arguments");
goto error;
}
/* Initialise the sample. */
memset(&smp, 0, sizeof(smp));
/* Run the sample fetch process. */
smp_set_owner(&smp, hsmp->p, hsmp->s->sess, hsmp->s, hsmp->dir & SMP_OPT_DIR);
if (!f->process(args, &smp, f->kw, f->private)) {
if (hsmp->flags & HLUA_F_AS_STRING)
lua_pushstring(L, "");
else
lua_pushnil(L);
goto end;
}
/* Convert the returned sample in lua value. */
if (hsmp->flags & HLUA_F_AS_STRING)
hlua_smp2lua_str(L, &smp);
else
hlua_smp2lua(L, &smp);
end:
for (i = 0; args[i].type != ARGT_STOP; i++) {
if (args[i].type == ARGT_STR)
chunk_destroy(&args[i].data.str);
else if (args[i].type == ARGT_REG)
regex_free(args[i].data.reg);
}
return 1;
error:
for (i = 0; args[i].type != ARGT_STOP; i++) {
if (args[i].type == ARGT_STR)
chunk_destroy(&args[i].data.str);
else if (args[i].type == ARGT_REG)
regex_free(args[i].data.reg);
}
WILL_LJMP(lua_error(L));
return 0; /* Never reached */
}
/*
*
*
* Class Converters
*
*
*/
/* Returns a struct hlua_session if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_smp *hlua_checkconverters(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_converters_ref));
}
/* This function creates and push in the stack a Converters object
* according with a current TXN.
*/
static int hlua_converters_new(lua_State *L, struct hlua_txn *txn, unsigned int flags)
{
struct hlua_smp *hsmp;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Converters object is the
* same than the TXN object.
*/
lua_newtable(L);
hsmp = lua_newuserdata(L, sizeof(*hsmp));
lua_rawseti(L, -2, 0);
hsmp->s = txn->s;
hsmp->p = txn->p;
hsmp->dir = txn->dir;
hsmp->flags = flags;
/* Pop a class stream metatable and affect it to the table. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_converters_ref);
lua_setmetatable(L, -2);
return 1;
}
/* This function is an LUA binding. It is called with each converter.
* It uses closure argument to store the associated converter. It
* returns only one argument or throws an error. An error is thrown
* only if an error is encountered during the argument parsing. If
* the converter function function fails, nil is returned.
*/
__LJMP static int hlua_run_sample_conv(lua_State *L)
{
struct hlua_smp *hsmp;
struct sample_conv *conv;
struct arg args[ARGM_NBARGS + 1] = {{0}};
int i;
struct sample smp;
/* Get closure arguments. */
conv = lua_touserdata(L, lua_upvalueindex(1));
/* Get traditional arguments. */
hsmp = MAY_LJMP(hlua_checkconverters(L, 1));
/* Get extra arguments. */
for (i = 0; i < lua_gettop(L) - 2; i++) {
if (i >= ARGM_NBARGS)
break;
hlua_lua2arg(L, i + 3, &args[i]);
}
args[i].type = ARGT_STOP;
args[i].data.str.area = NULL;
/* Check arguments. */
MAY_LJMP(hlua_lua2arg_check(L, 3, args, conv->arg_mask, hsmp->p));
/* Run the special args checker. */
if (conv->val_args && !conv->val_args(args, conv, "", 0, NULL)) {
hlua_pusherror(L, "error in arguments");
goto error;
}
/* Initialise the sample. */
memset(&smp, 0, sizeof(smp));
if (!hlua_lua2smp(L, 2, &smp)) {
hlua_pusherror(L, "error in the input argument");
goto error;
}
smp_set_owner(&smp, hsmp->p, hsmp->s->sess, hsmp->s, hsmp->dir & SMP_OPT_DIR);
/* Apply expected cast. */
if (!sample_casts[smp.data.type][conv->in_type]) {
hlua_pusherror(L, "invalid input argument: cannot cast '%s' to '%s'",
smp_to_type[smp.data.type], smp_to_type[conv->in_type]);
goto error;
}
if (sample_casts[smp.data.type][conv->in_type] != c_none &&
!sample_casts[smp.data.type][conv->in_type](&smp)) {
hlua_pusherror(L, "error during the input argument casting");
goto error;
}
/* Run the sample conversion process. */
if (!conv->process(args, &smp, conv->private)) {
if (hsmp->flags & HLUA_F_AS_STRING)
lua_pushstring(L, "");
else
lua_pushnil(L);
goto end;
}
/* Convert the returned sample in lua value. */
if (hsmp->flags & HLUA_F_AS_STRING)
hlua_smp2lua_str(L, &smp);
else
hlua_smp2lua(L, &smp);
end:
for (i = 0; args[i].type != ARGT_STOP; i++) {
if (args[i].type == ARGT_STR)
chunk_destroy(&args[i].data.str);
else if (args[i].type == ARGT_REG)
regex_free(args[i].data.reg);
}
return 1;
error:
for (i = 0; args[i].type != ARGT_STOP; i++) {
if (args[i].type == ARGT_STR)
chunk_destroy(&args[i].data.str);
else if (args[i].type == ARGT_REG)
regex_free(args[i].data.reg);
}
WILL_LJMP(lua_error(L));
return 0; /* Never reached */
}
/*
*
*
* Class AppletTCP
*
*
*/
/* Returns a struct hlua_txn if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_appctx *hlua_checkapplet_tcp(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_applet_tcp_ref));
}
/* This function creates and push in the stack an Applet object
* according with a current TXN.
*/
static int hlua_applet_tcp_new(lua_State *L, struct appctx *ctx)
{
struct hlua_appctx *luactx;
struct stream_interface *si = ctx->owner;
struct stream *s = si_strm(si);
struct proxy *p = s->be;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Converters object is the
* same than the TXN object.
*/
lua_newtable(L);
luactx = lua_newuserdata(L, sizeof(*luactx));
lua_rawseti(L, -2, 0);
luactx->appctx = ctx;
luactx->htxn.s = s;
luactx->htxn.p = p;
/* Create the "f" field that contains a list of fetches. */
lua_pushstring(L, "f");
if (!hlua_fetches_new(L, &luactx->htxn, 0))
return 0;
lua_settable(L, -3);
/* Create the "sf" field that contains a list of stringsafe fetches. */
lua_pushstring(L, "sf");
if (!hlua_fetches_new(L, &luactx->htxn, HLUA_F_AS_STRING))
return 0;
lua_settable(L, -3);
/* Create the "c" field that contains a list of converters. */
lua_pushstring(L, "c");
if (!hlua_converters_new(L, &luactx->htxn, 0))
return 0;
lua_settable(L, -3);
/* Create the "sc" field that contains a list of stringsafe converters. */
lua_pushstring(L, "sc");
if (!hlua_converters_new(L, &luactx->htxn, HLUA_F_AS_STRING))
return 0;
lua_settable(L, -3);
/* Pop a class stream metatable and affect it to the table. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_applet_tcp_ref);
lua_setmetatable(L, -2);
return 1;
}
__LJMP static int hlua_applet_tcp_set_var(lua_State *L)
{
struct hlua_appctx *luactx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
if (lua_gettop(L) < 3 || lua_gettop(L) > 4)
WILL_LJMP(luaL_error(L, "'set_var' needs between 3 and 4 arguments"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = luactx->htxn.s;
/* Converts the third argument in a sample. */
memset(&smp, 0, sizeof(smp));
hlua_lua2smp(L, 3, &smp);
/* Store the sample in a variable. */
smp_set_owner(&smp, s->be, s->sess, s, 0);
if (lua_gettop(L) == 4 && lua_toboolean(L, 4))
lua_pushboolean(L, vars_set_by_name_ifexist(name, len, &smp) != 0);
else
lua_pushboolean(L, vars_set_by_name(name, len, &smp) != 0);
return 1;
}
__LJMP static int hlua_applet_tcp_unset_var(lua_State *L)
{
struct hlua_appctx *luactx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "unset_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = luactx->htxn.s;
/* Unset the variable. */
smp_set_owner(&smp, s->be, s->sess, s, 0);
lua_pushboolean(L, vars_unset_by_name_ifexist(name, len, &smp) != 0);
return 1;
}
__LJMP static int hlua_applet_tcp_get_var(lua_State *L)
{
struct hlua_appctx *luactx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "get_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = luactx->htxn.s;
smp_set_owner(&smp, s->be, s->sess, s, 0);
if (!vars_get_by_name(name, len, &smp)) {
lua_pushnil(L);
return 1;
}
return hlua_smp2lua(L, &smp);
}
__LJMP static int hlua_applet_tcp_set_priv(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
struct stream *s = luactx->htxn.s;
struct hlua *hlua;
/* Note that this hlua struct is from the session and not from the applet. */
if (!s->hlua)
return 0;
hlua = s->hlua;
MAY_LJMP(check_args(L, 2, "set_priv"));
/* Remove previous value. */
luaL_unref(L, LUA_REGISTRYINDEX, hlua->Mref);
/* Get and store new value. */
lua_pushvalue(L, 2); /* Copy the element 2 at the top of the stack. */
hlua->Mref = luaL_ref(L, LUA_REGISTRYINDEX); /* pop the previously pushed value. */
return 0;
}
__LJMP static int hlua_applet_tcp_get_priv(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
struct stream *s = luactx->htxn.s;
struct hlua *hlua;
/* Note that this hlua struct is from the session and not from the applet. */
if (!s->hlua) {
lua_pushnil(L);
return 1;
}
hlua = s->hlua;
/* Push configuration index in the stack. */
lua_rawgeti(L, LUA_REGISTRYINDEX, hlua->Mref);
return 1;
}
/* If expected data not yet available, it returns a yield. This function
* consumes the data in the buffer. It returns a string containing the
* data. This string can be empty.
*/
__LJMP static int hlua_applet_tcp_getline_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
struct stream_interface *si = luactx->appctx->owner;
int ret;
const char *blk1;
size_t len1;
const char *blk2;
size_t len2;
/* Read the maximum amount of data available. */
ret = co_getline_nc(si_oc(si), &blk1, &len1, &blk2, &len2);
/* Data not yet available. return yield. */
if (ret == 0) {
si_cant_get(si);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_getline_yield, TICK_ETERNITY, 0));
}
/* End of data: commit the total strings and return. */
if (ret < 0) {
luaL_pushresult(&luactx->b);
return 1;
}
/* Ensure that the block 2 length is usable. */
if (ret == 1)
len2 = 0;
/* don't check the max length read and don't check. */
luaL_addlstring(&luactx->b, blk1, len1);
luaL_addlstring(&luactx->b, blk2, len2);
/* Consume input channel output buffer data. */
co_skip(si_oc(si), len1 + len2);
luaL_pushresult(&luactx->b);
return 1;
}
/* Check arguments for the function "hlua_channel_get_yield". */
__LJMP static int hlua_applet_tcp_getline(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
/* Initialise the string catenation. */
luaL_buffinit(L, &luactx->b);
return MAY_LJMP(hlua_applet_tcp_getline_yield(L, 0, 0));
}
/* If expected data not yet available, it returns a yield. This function
* consumes the data in the buffer. It returns a string containing the
* data. This string can be empty.
*/
__LJMP static int hlua_applet_tcp_recv_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
struct stream_interface *si = luactx->appctx->owner;
size_t len = MAY_LJMP(luaL_checkinteger(L, 2));
int ret;
const char *blk1;
size_t len1;
const char *blk2;
size_t len2;
/* Read the maximum amount of data available. */
ret = co_getblk_nc(si_oc(si), &blk1, &len1, &blk2, &len2);
/* Data not yet available. return yield. */
if (ret == 0) {
si_cant_get(si);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_recv_yield, TICK_ETERNITY, 0));
}
/* End of data: commit the total strings and return. */
if (ret < 0) {
luaL_pushresult(&luactx->b);
return 1;
}
/* Ensure that the block 2 length is usable. */
if (ret == 1)
len2 = 0;
if (len == -1) {
/* If len == -1, catenate all the data avalaile and
* yield because we want to get all the data until
* the end of data stream.
*/
luaL_addlstring(&luactx->b, blk1, len1);
luaL_addlstring(&luactx->b, blk2, len2);
co_skip(si_oc(si), len1 + len2);
si_cant_get(si);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_recv_yield, TICK_ETERNITY, 0));
} else {
/* Copy the first block caping to the length required. */
if (len1 > len)
len1 = len;
luaL_addlstring(&luactx->b, blk1, len1);
len -= len1;
/* Copy the second block. */
if (len2 > len)
len2 = len;
luaL_addlstring(&luactx->b, blk2, len2);
len -= len2;
/* Consume input channel output buffer data. */
co_skip(si_oc(si), len1 + len2);
/* If there is no other data available, yield waiting for new data. */
if (len > 0) {
lua_pushinteger(L, len);
lua_replace(L, 2);
si_cant_get(si);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_recv_yield, TICK_ETERNITY, 0));
}
/* return the result. */
luaL_pushresult(&luactx->b);
return 1;
}
/* we never execute this */
hlua_pusherror(L, "Lua: internal error");
WILL_LJMP(lua_error(L));
return 0;
}
/* Check arguments for the function "hlua_channel_get_yield". */
__LJMP static int hlua_applet_tcp_recv(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
int len = -1;
if (lua_gettop(L) > 2)
WILL_LJMP(luaL_error(L, "The 'recv' function requires between 1 and 2 arguments."));
if (lua_gettop(L) >= 2) {
len = MAY_LJMP(luaL_checkinteger(L, 2));
lua_pop(L, 1);
}
/* Confirm or set the required length */
lua_pushinteger(L, len);
/* Initialise the string catenation. */
luaL_buffinit(L, &luactx->b);
return MAY_LJMP(hlua_applet_tcp_recv_yield(L, 0, 0));
}
/* Append data in the output side of the buffer. This data is immediately
* sent. The function returns the amount of data written. If the buffer
* cannot contain the data, the function yields. The function returns -1
* if the channel is closed.
*/
__LJMP static int hlua_applet_tcp_send_yield(lua_State *L, int status, lua_KContext ctx)
{
size_t len;
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
const char *str = MAY_LJMP(luaL_checklstring(L, 2, &len));
int l = MAY_LJMP(luaL_checkinteger(L, 3));
struct stream_interface *si = luactx->appctx->owner;
struct channel *chn = si_ic(si);
int max;
/* Get the max amount of data which can write as input in the channel. */
max = channel_recv_max(chn);
if (max > (len - l))
max = len - l;
/* Copy data. */
ci_putblk(chn, str + l, max);
/* update counters. */
l += max;
lua_pop(L, 1);
lua_pushinteger(L, l);
/* If some data is not send, declares the situation to the
* applet, and returns a yield.
*/
if (l < len) {
si_rx_room_blk(si);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_send_yield, TICK_ETERNITY, 0));
}
return 1;
}
/* Just a wrapper of "hlua_applet_tcp_send_yield". This wrapper permits
* yield the LUA process, and resume it without checking the
* input arguments.
*/
__LJMP static int hlua_applet_tcp_send(lua_State *L)
{
MAY_LJMP(check_args(L, 2, "send"));
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_applet_tcp_send_yield(L, 0, 0));
}
/*
*
*
* Class AppletHTTP
*
*
*/
/* Returns a struct hlua_txn if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_appctx *hlua_checkapplet_http(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_applet_http_ref));
}
/* This function creates and push in the stack an Applet object
* according with a current TXN.
*/
static int hlua_applet_http_new(lua_State *L, struct appctx *ctx)
{
struct hlua_appctx *luactx;
struct hlua_txn htxn;
struct stream_interface *si = ctx->owner;
struct stream *s = si_strm(si);
struct proxy *px = s->be;
struct htx *htx;
struct htx_blk *blk;
struct htx_sl *sl;
struct ist path;
unsigned long long len = 0;
int32_t pos;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Converters object is the
* same than the TXN object.
*/
lua_newtable(L);
luactx = lua_newuserdata(L, sizeof(*luactx));
lua_rawseti(L, -2, 0);
luactx->appctx = ctx;
luactx->appctx->ctx.hlua_apphttp.status = 200; /* Default status code returned. */
luactx->appctx->ctx.hlua_apphttp.reason = NULL; /* Use default reason based on status */
luactx->htxn.s = s;
luactx->htxn.p = px;
/* Create the "f" field that contains a list of fetches. */
lua_pushstring(L, "f");
if (!hlua_fetches_new(L, &luactx->htxn, 0))
return 0;
lua_settable(L, -3);
/* Create the "sf" field that contains a list of stringsafe fetches. */
lua_pushstring(L, "sf");
if (!hlua_fetches_new(L, &luactx->htxn, HLUA_F_AS_STRING))
return 0;
lua_settable(L, -3);
/* Create the "c" field that contains a list of converters. */
lua_pushstring(L, "c");
if (!hlua_converters_new(L, &luactx->htxn, 0))
return 0;
lua_settable(L, -3);
/* Create the "sc" field that contains a list of stringsafe converters. */
lua_pushstring(L, "sc");
if (!hlua_converters_new(L, &luactx->htxn, HLUA_F_AS_STRING))
return 0;
lua_settable(L, -3);
htx = htxbuf(&s->req.buf);
blk = htx_get_first_blk(htx);
BUG_ON(!blk || htx_get_blk_type(blk) != HTX_BLK_REQ_SL);
sl = htx_get_blk_ptr(htx, blk);
/* Stores the request method. */
lua_pushstring(L, "method");
lua_pushlstring(L, HTX_SL_REQ_MPTR(sl), HTX_SL_REQ_MLEN(sl));
lua_settable(L, -3);
/* Stores the http version. */
lua_pushstring(L, "version");
lua_pushlstring(L, HTX_SL_REQ_VPTR(sl), HTX_SL_REQ_VLEN(sl));
lua_settable(L, -3);
/* creates an array of headers. hlua_http_get_headers() crates and push
* the array on the top of the stack.
*/
lua_pushstring(L, "headers");
htxn.s = s;
htxn.p = px;
htxn.dir = SMP_OPT_DIR_REQ;
if (!hlua_http_get_headers(L, &htxn.s->txn->req))
return 0;
lua_settable(L, -3);
path = http_get_path(htx_sl_req_uri(sl));
if (isttest(path)) {
char *p, *q, *end;
p = path.ptr;
end = path.ptr + path.len;
q = p;
while (q < end && *q != '?')
q++;
/* Stores the request path. */
lua_pushstring(L, "path");
lua_pushlstring(L, p, q - p);
lua_settable(L, -3);
/* Stores the query string. */
lua_pushstring(L, "qs");
if (*q == '?')
q++;
lua_pushlstring(L, q, end - q);
lua_settable(L, -3);
}
for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
struct htx_blk *blk = htx_get_blk(htx, pos);
enum htx_blk_type type = htx_get_blk_type(blk);
if (type == HTX_BLK_TLR || type == HTX_BLK_EOT)
break;
if (type == HTX_BLK_DATA)
len += htx_get_blksz(blk);
}
if (htx->extra != ULLONG_MAX)
len += htx->extra;
/* Stores the request path. */
lua_pushstring(L, "length");
lua_pushinteger(L, len);
lua_settable(L, -3);
/* Create an empty array of HTTP request headers. */
lua_pushstring(L, "response");
lua_newtable(L);
lua_settable(L, -3);
/* Pop a class stream metatable and affect it to the table. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_applet_http_ref);
lua_setmetatable(L, -2);
return 1;
}
__LJMP static int hlua_applet_http_set_var(lua_State *L)
{
struct hlua_appctx *luactx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
if (lua_gettop(L) < 3 || lua_gettop(L) > 4)
WILL_LJMP(luaL_error(L, "'set_var' needs between 3 and 4 arguments"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = luactx->htxn.s;
/* Converts the third argument in a sample. */
memset(&smp, 0, sizeof(smp));
hlua_lua2smp(L, 3, &smp);
/* Store the sample in a variable. */
smp_set_owner(&smp, s->be, s->sess, s, 0);
if (lua_gettop(L) == 4 && lua_toboolean(L, 4))
lua_pushboolean(L, vars_set_by_name_ifexist(name, len, &smp) != 0);
else
lua_pushboolean(L, vars_set_by_name(name, len, &smp) != 0);
return 1;
}
__LJMP static int hlua_applet_http_unset_var(lua_State *L)
{
struct hlua_appctx *luactx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "unset_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = luactx->htxn.s;
/* Unset the variable. */
smp_set_owner(&smp, s->be, s->sess, s, 0);
lua_pushboolean(L, vars_unset_by_name_ifexist(name, len, &smp) != 0);
return 1;
}
__LJMP static int hlua_applet_http_get_var(lua_State *L)
{
struct hlua_appctx *luactx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "get_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = luactx->htxn.s;
smp_set_owner(&smp, s->be, s->sess, s, 0);
if (!vars_get_by_name(name, len, &smp)) {
lua_pushnil(L);
return 1;
}
return hlua_smp2lua(L, &smp);
}
__LJMP static int hlua_applet_http_set_priv(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream *s = luactx->htxn.s;
struct hlua *hlua;
/* Note that this hlua struct is from the session and not from the applet. */
if (!s->hlua)
return 0;
hlua = s->hlua;
MAY_LJMP(check_args(L, 2, "set_priv"));
/* Remove previous value. */
luaL_unref(L, LUA_REGISTRYINDEX, hlua->Mref);
/* Get and store new value. */
lua_pushvalue(L, 2); /* Copy the element 2 at the top of the stack. */
hlua->Mref = luaL_ref(L, LUA_REGISTRYINDEX); /* pop the previously pushed value. */
return 0;
}
__LJMP static int hlua_applet_http_get_priv(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream *s = luactx->htxn.s;
struct hlua *hlua;
/* Note that this hlua struct is from the session and not from the applet. */
if (!s->hlua) {
lua_pushnil(L);
return 1;
}
hlua = s->hlua;
/* Push configuration index in the stack. */
lua_rawgeti(L, LUA_REGISTRYINDEX, hlua->Mref);
return 1;
}
/* If expected data not yet available, it returns a yield. This function
* consumes the data in the buffer. It returns a string containing the
* data. This string can be empty.
*/
__LJMP static int hlua_applet_http_getline_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream_interface *si = luactx->appctx->owner;
struct channel *req = si_oc(si);
struct htx *htx;
struct htx_blk *blk;
size_t count;
int stop = 0;
htx = htx_from_buf(&req->buf);
count = co_data(req);
blk = htx_get_first_blk(htx);
while (count && !stop && blk) {
enum htx_blk_type type = htx_get_blk_type(blk);
uint32_t sz = htx_get_blksz(blk);
struct ist v;
uint32_t vlen;
char *nl;
vlen = sz;
if (vlen > count) {
if (type != HTX_BLK_DATA)
break;
vlen = count;
}
switch (type) {
case HTX_BLK_UNUSED:
break;
case HTX_BLK_DATA:
v = htx_get_blk_value(htx, blk);
v.len = vlen;
nl = istchr(v, '\n');
if (nl != NULL) {
stop = 1;
vlen = nl - v.ptr + 1;
}
luaL_addlstring(&luactx->b, v.ptr, vlen);
break;
case HTX_BLK_TLR:
case HTX_BLK_EOT:
stop = 1;
break;
default:
break;
}
co_set_data(req, co_data(req) - vlen);
count -= vlen;
if (sz == vlen)
blk = htx_remove_blk(htx, blk);
else {
htx_cut_data_blk(htx, blk, vlen);
break;
}
}
/* The message was fully consumed and no more data are expected
* (EOM flag set).
*/
if (htx_is_empty(htx) && (htx->flags & HTX_FL_EOM))
stop = 1;
htx_to_buf(htx, &req->buf);
if (!stop) {
si_cant_get(si);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_getline_yield, TICK_ETERNITY, 0));
}
/* return the result. */
luaL_pushresult(&luactx->b);
return 1;
}
/* Check arguments for the function "hlua_channel_get_yield". */
__LJMP static int hlua_applet_http_getline(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
/* Initialise the string catenation. */
luaL_buffinit(L, &luactx->b);
return MAY_LJMP(hlua_applet_http_getline_yield(L, 0, 0));
}
/* If expected data not yet available, it returns a yield. This function
* consumes the data in the buffer. It returns a string containing the
* data. This string can be empty.
*/
__LJMP static int hlua_applet_http_recv_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream_interface *si = luactx->appctx->owner;
struct channel *req = si_oc(si);
struct htx *htx;
struct htx_blk *blk;
size_t count;
int len;
htx = htx_from_buf(&req->buf);
len = MAY_LJMP(luaL_checkinteger(L, 2));
count = co_data(req);
blk = htx_get_head_blk(htx);
while (count && len && blk) {
enum htx_blk_type type = htx_get_blk_type(blk);
uint32_t sz = htx_get_blksz(blk);
struct ist v;
uint32_t vlen;
vlen = sz;
if (len > 0 && vlen > len)
vlen = len;
if (vlen > count) {
if (type != HTX_BLK_DATA)
break;
vlen = count;
}
switch (type) {
case HTX_BLK_UNUSED:
break;
case HTX_BLK_DATA:
v = htx_get_blk_value(htx, blk);
luaL_addlstring(&luactx->b, v.ptr, vlen);
break;
case HTX_BLK_TLR:
case HTX_BLK_EOT:
len = 0;
break;
default:
break;
}
co_set_data(req, co_data(req) - vlen);
count -= vlen;
if (len > 0)
len -= vlen;
if (sz == vlen)
blk = htx_remove_blk(htx, blk);
else {
htx_cut_data_blk(htx, blk, vlen);
break;
}
}
/* The message was fully consumed and no more data are expected
* (EOM flag set).
*/
if (htx_is_empty(htx) && (htx->flags & HTX_FL_EOM))
len = 0;
htx_to_buf(htx, &req->buf);
/* If we are no other data available, yield waiting for new data. */
if (len) {
if (len > 0) {
lua_pushinteger(L, len);
lua_replace(L, 2);
}
si_cant_get(si);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_recv_yield, TICK_ETERNITY, 0));
}
/* return the result. */
luaL_pushresult(&luactx->b);
return 1;
}
/* Check arguments for the function "hlua_channel_get_yield". */
__LJMP static int hlua_applet_http_recv(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
int len = -1;
/* Check arguments. */
if (lua_gettop(L) > 2)
WILL_LJMP(luaL_error(L, "The 'recv' function requires between 1 and 2 arguments."));
if (lua_gettop(L) >= 2) {
len = MAY_LJMP(luaL_checkinteger(L, 2));
lua_pop(L, 1);
}
lua_pushinteger(L, len);
/* Initialise the string catenation. */
luaL_buffinit(L, &luactx->b);
return MAY_LJMP(hlua_applet_http_recv_yield(L, 0, 0));
}
/* Append data in the output side of the buffer. This data is immediately
* sent. The function returns the amount of data written. If the buffer
* cannot contain the data, the function yields. The function returns -1
* if the channel is closed.
*/
__LJMP static int hlua_applet_http_send_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream_interface *si = luactx->appctx->owner;
struct channel *res = si_ic(si);
struct htx *htx = htx_from_buf(&res->buf);
const char *data;
size_t len;
int l = MAY_LJMP(luaL_checkinteger(L, 3));
int max;
max = htx_get_max_blksz(htx, channel_htx_recv_max(res, htx));
if (!max)
goto snd_yield;
data = MAY_LJMP(luaL_checklstring(L, 2, &len));
/* Get the max amount of data which can write as input in the channel. */
if (max > (len - l))
max = len - l;
/* Copy data. */
max = htx_add_data(htx, ist2(data + l, max));
channel_add_input(res, max);
/* update counters. */
l += max;
lua_pop(L, 1);
lua_pushinteger(L, l);
/* If some data is not send, declares the situation to the
* applet, and returns a yield.
*/
if (l < len) {
snd_yield:
htx_to_buf(htx, &res->buf);
si_rx_room_blk(si);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_send_yield, TICK_ETERNITY, 0));
}
htx_to_buf(htx, &res->buf);
return 1;
}
/* Just a wrapper of "hlua_applet_send_yield". This wrapper permits
* yield the LUA process, and resume it without checking the
* input arguments.
*/
__LJMP static int hlua_applet_http_send(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
/* We want to send some data. Headers must be sent. */
if (!(luactx->appctx->ctx.hlua_apphttp.flags & APPLET_HDR_SENT)) {
hlua_pusherror(L, "Lua: 'send' you must call start_response() before sending data.");
WILL_LJMP(lua_error(L));
}
/* This integer is used for followinf the amount of data sent. */
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_applet_http_send_yield(L, 0, 0));
}
__LJMP static int hlua_applet_http_addheader(lua_State *L)
{
const char *name;
int ret;
MAY_LJMP(hlua_checkapplet_http(L, 1));
name = MAY_LJMP(luaL_checkstring(L, 2));
MAY_LJMP(luaL_checkstring(L, 3));
/* Push in the stack the "response" entry. */
ret = lua_getfield(L, 1, "response");
if (ret != LUA_TTABLE) {
hlua_pusherror(L, "Lua: 'add_header' internal error: AppletHTTP['response'] "
"is expected as an array. %s found", lua_typename(L, ret));
WILL_LJMP(lua_error(L));
}
/* check if the header is already registered if it is not
* the case, register it.
*/
ret = lua_getfield(L, -1, name);
if (ret == LUA_TNIL) {
/* Entry not found. */
lua_pop(L, 1); /* remove the nil. The "response" table is the top of the stack. */
/* Insert the new header name in the array in the top of the stack.
* It left the new array in the top of the stack.
*/
lua_newtable(L);
lua_pushvalue(L, 2);
lua_pushvalue(L, -2);
lua_settable(L, -4);
} else if (ret != LUA_TTABLE) {
/* corruption error. */
hlua_pusherror(L, "Lua: 'add_header' internal error: AppletHTTP['response']['%s'] "
"is expected as an array. %s found", name, lua_typename(L, ret));
WILL_LJMP(lua_error(L));
}
/* Now the top of thestack is an array of values. We push
* the header value as new entry.
*/
lua_pushvalue(L, 3);
ret = lua_rawlen(L, -2);
lua_rawseti(L, -2, ret + 1);
lua_pushboolean(L, 1);
return 1;
}
__LJMP static int hlua_applet_http_status(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
int status = MAY_LJMP(luaL_checkinteger(L, 2));
const char *reason = MAY_LJMP(luaL_optlstring(L, 3, NULL, NULL));
if (status < 100 || status > 599) {
lua_pushboolean(L, 0);
return 1;
}
luactx->appctx->ctx.hlua_apphttp.status = status;
luactx->appctx->ctx.hlua_apphttp.reason = reason;
lua_pushboolean(L, 1);
return 1;
}
__LJMP static int hlua_applet_http_send_response(lua_State *L)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream_interface *si = luactx->appctx->owner;
struct channel *res = si_ic(si);
struct htx *htx;
struct htx_sl *sl;
struct h1m h1m;
const char *status, *reason;
const char *name, *value;
size_t nlen, vlen;
unsigned int flags;
/* Send the message at once. */
htx = htx_from_buf(&res->buf);
h1m_init_res(&h1m);
/* Use the same http version than the request. */
status = ultoa_r(luactx->appctx->ctx.hlua_apphttp.status, trash.area, trash.size);
reason = luactx->appctx->ctx.hlua_apphttp.reason;
if (reason == NULL)
reason = http_get_reason(luactx->appctx->ctx.hlua_apphttp.status);
if (luactx->appctx->ctx.hlua_apphttp.flags & APPLET_HTTP11) {
flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11);
sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), ist(status), ist(reason));
}
else {
flags = HTX_SL_F_IS_RESP;
sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.0"), ist(status), ist(reason));
}
if (!sl) {
hlua_pusherror(L, "Lua applet http '%s': Failed to create response.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name);
WILL_LJMP(lua_error(L));
}
sl->info.res.status = luactx->appctx->ctx.hlua_apphttp.status;
/* Get the array associated to the field "response" in the object AppletHTTP. */
lua_pushvalue(L, 0);
if (lua_getfield(L, 1, "response") != LUA_TTABLE) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response'] missing.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name);
WILL_LJMP(lua_error(L));
}
/* Browse the list of headers. */
lua_pushnil(L);
while(lua_next(L, -2) != 0) {
/* We expect a string as -2. */
if (lua_type(L, -2) != LUA_TSTRING) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response'][] element must be a string. got %s.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name,
lua_typename(L, lua_type(L, -2)));
WILL_LJMP(lua_error(L));
}
name = lua_tolstring(L, -2, &nlen);
/* We expect an array as -1. */
if (lua_type(L, -1) != LUA_TTABLE) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response']['%s'] element must be an table. got %s.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name,
name,
lua_typename(L, lua_type(L, -1)));
WILL_LJMP(lua_error(L));
}
/* Browse the table who is on the top of the stack. */
lua_pushnil(L);
while(lua_next(L, -2) != 0) {
int id;
/* We expect a number as -2. */
if (lua_type(L, -2) != LUA_TNUMBER) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response']['%s'][] element must be a number. got %s.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name,
name,
lua_typename(L, lua_type(L, -2)));
WILL_LJMP(lua_error(L));
}
id = lua_tointeger(L, -2);
/* We expect a string as -2. */
if (lua_type(L, -1) != LUA_TSTRING) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response']['%s'][%d] element must be a string. got %s.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name,
name, id,
lua_typename(L, lua_type(L, -1)));
WILL_LJMP(lua_error(L));
}
value = lua_tolstring(L, -1, &vlen);
/* Simple Protocol checks. */
if (isteqi(ist2(name, nlen), ist("transfer-encoding")))
h1_parse_xfer_enc_header(&h1m, ist2(value, vlen));
else if (isteqi(ist2(name, nlen), ist("content-length"))) {
struct ist v = ist2(value, vlen);
int ret;
ret = h1_parse_cont_len_header(&h1m, &v);
if (ret < 0) {
hlua_pusherror(L, "Lua applet http '%s': Invalid '%s' header.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name,
name);
WILL_LJMP(lua_error(L));
}
else if (ret == 0)
goto next; /* Skip it */
}
/* Add a new header */
if (!htx_add_header(htx, ist2(name, nlen), ist2(value, vlen))) {
hlua_pusherror(L, "Lua applet http '%s': Failed to add header '%s' in the response.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name,
name);
WILL_LJMP(lua_error(L));
}
next:
/* Remove the array from the stack, and get next element with a remaining string. */
lua_pop(L, 1);
}
/* Remove the array from the stack, and get next element with a remaining string. */
lua_pop(L, 1);
}
if (h1m.flags & H1_MF_CHNK)
h1m.flags &= ~H1_MF_CLEN;
if (h1m.flags & (H1_MF_CLEN|H1_MF_CHNK))
h1m.flags |= H1_MF_XFER_LEN;
/* Uset HTX start-line flags */
if (h1m.flags & H1_MF_XFER_ENC)
flags |= HTX_SL_F_XFER_ENC;
if (h1m.flags & H1_MF_XFER_LEN) {
flags |= HTX_SL_F_XFER_LEN;
if (h1m.flags & H1_MF_CHNK)
flags |= HTX_SL_F_CHNK;
else if (h1m.flags & H1_MF_CLEN)
flags |= HTX_SL_F_CLEN;
if (h1m.body_len == 0)
flags |= HTX_SL_F_BODYLESS;
}
sl->flags |= flags;
/* If we don't have a content-length set, and the HTTP version is 1.1
* and the status code implies the presence of a message body, we must
* announce a transfer encoding chunked. This is required by haproxy
* for the keepalive compliance. If the applet announces a transfer-encoding
* chunked itself, don't do anything.
*/
if ((flags & (HTX_SL_F_VER_11|HTX_SL_F_XFER_LEN)) == HTX_SL_F_VER_11 &&
luactx->appctx->ctx.hlua_apphttp.status >= 200 &&
luactx->appctx->ctx.hlua_apphttp.status != 204 &&
luactx->appctx->ctx.hlua_apphttp.status != 304) {
/* Add a new header */
sl->flags |= (HTX_SL_F_XFER_ENC|H1_MF_CHNK|H1_MF_XFER_LEN);
if (!htx_add_header(htx, ist("transfer-encoding"), ist("chunked"))) {
hlua_pusherror(L, "Lua applet http '%s': Failed to add header 'transfer-encoding' in the response.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name);
WILL_LJMP(lua_error(L));
}
}
/* Finalize headers. */
if (!htx_add_endof(htx, HTX_BLK_EOH)) {
hlua_pusherror(L, "Lua applet http '%s': Failed create the response.\n",
luactx->appctx->rule->arg.hlua_rule->fcn->name);
WILL_LJMP(lua_error(L));
}
if (htx_used_space(htx) > b_size(&res->buf) - global.tune.maxrewrite) {
b_reset(&res->buf);
hlua_pusherror(L, "Lua: 'start_response': response header block too big");
WILL_LJMP(lua_error(L));
}
htx_to_buf(htx, &res->buf);
channel_add_input(res, htx->data);
/* Headers sent, set the flag. */
luactx->appctx->ctx.hlua_apphttp.flags |= APPLET_HDR_SENT;
return 0;
}
/* We will build the status line and the headers of the HTTP response.
* We will try send at once if its not possible, we give back the hand
* waiting for more room.
*/
__LJMP static int hlua_applet_http_start_response_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *luactx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream_interface *si = luactx->appctx->owner;
struct channel *res = si_ic(si);
if (co_data(res)) {
si_rx_room_blk(si);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_start_response_yield, TICK_ETERNITY, 0));
}
return MAY_LJMP(hlua_applet_http_send_response(L));
}
__LJMP static int hlua_applet_http_start_response(lua_State *L)
{
return MAY_LJMP(hlua_applet_http_start_response_yield(L, 0, 0));
}
/*
*
*
* Class HTTP
*
*
*/
/* Returns a struct hlua_txn if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_txn *hlua_checkhttp(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_http_ref));
}
/* This function creates and push in the stack a HTTP object
* according with a current TXN.
*/
static int hlua_http_new(lua_State *L, struct hlua_txn *txn)
{
struct hlua_txn *htxn;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Converters object is the
* same than the TXN object.
*/
lua_newtable(L);
htxn = lua_newuserdata(L, sizeof(*htxn));
lua_rawseti(L, -2, 0);
htxn->s = txn->s;
htxn->p = txn->p;
htxn->dir = txn->dir;
htxn->flags = txn->flags;
/* Pop a class stream metatable and affect it to the table. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_http_ref);
lua_setmetatable(L, -2);
return 1;
}
/* This function creates ans returns an array of HTTP headers.
* This function does not fails. It is used as wrapper with the
* 2 following functions.
*/
__LJMP static int hlua_http_get_headers(lua_State *L, struct http_msg *msg)
{
struct htx *htx;
int32_t pos;
/* Create the table. */
lua_newtable(L);
htx = htxbuf(&msg->chn->buf);
for (pos = htx_get_first(htx); pos != -1; pos = htx_get_next(htx, pos)) {
struct htx_blk *blk = htx_get_blk(htx, pos);
enum htx_blk_type type = htx_get_blk_type(blk);
struct ist n, v;
int len;
if (type == HTX_BLK_HDR) {
n = htx_get_blk_name(htx,blk);
v = htx_get_blk_value(htx, blk);
}
else if (type == HTX_BLK_EOH)
break;
else
continue;
/* Check for existing entry:
* assume that the table is on the top of the stack, and
* push the key in the stack, the function lua_gettable()
* perform the lookup.
*/
lua_pushlstring(L, n.ptr, n.len);
lua_gettable(L, -2);
switch (lua_type(L, -1)) {
case LUA_TNIL:
/* Table not found, create it. */
lua_pop(L, 1); /* remove the nil value. */
lua_pushlstring(L, n.ptr, n.len); /* push the header name as key. */
lua_newtable(L); /* create and push empty table. */
lua_pushlstring(L, v.ptr, v.len); /* push header value. */
lua_rawseti(L, -2, 0); /* index header value (pop it). */
lua_rawset(L, -3); /* index new table with header name (pop the values). */
break;
case LUA_TTABLE:
/* Entry found: push the value in the table. */
len = lua_rawlen(L, -1);
lua_pushlstring(L, v.ptr, v.len); /* push header value. */
lua_rawseti(L, -2, len+1); /* index header value (pop it). */
lua_pop(L, 1); /* remove the table (it is stored in the main table). */
break;
default:
/* Other cases are errors. */
hlua_pusherror(L, "internal error during the parsing of headers.");
WILL_LJMP(lua_error(L));
}
}
return 1;
}
__LJMP static int hlua_http_req_get_headers(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 1, "req_get_headers"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return hlua_http_get_headers(L, &htxn->s->txn->req);
}
__LJMP static int hlua_http_res_get_headers(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 1, "res_get_headers"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_RES || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return hlua_http_get_headers(L, &htxn->s->txn->rsp);
}
/* This function replace full header, or just a value in
* the request or in the response. It is a wrapper fir the
* 4 following functions.
*/
__LJMP static inline int hlua_http_rep_hdr(lua_State *L, struct http_msg *msg, int full)
{
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
const char *reg = MAY_LJMP(luaL_checkstring(L, 3));
const char *value = MAY_LJMP(luaL_checkstring(L, 4));
struct htx *htx;
struct my_regex *re;
if (!(re = regex_comp(reg, 1, 1, NULL)))
WILL_LJMP(luaL_argerror(L, 3, "invalid regex"));
htx = htxbuf(&msg->chn->buf);
http_replace_hdrs(chn_strm(msg->chn), htx, ist2(name, name_len), value, re, full);
regex_free(re);
return 0;
}
__LJMP static int hlua_http_req_rep_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 4, "req_rep_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return MAY_LJMP(hlua_http_rep_hdr(L, &htxn->s->txn->req, 1));
}
__LJMP static int hlua_http_res_rep_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 4, "res_rep_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_RES || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return MAY_LJMP(hlua_http_rep_hdr(L, &htxn->s->txn->rsp, 1));
}
__LJMP static int hlua_http_req_rep_val(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 4, "req_rep_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return MAY_LJMP(hlua_http_rep_hdr(L, &htxn->s->txn->req, 0));
}
__LJMP static int hlua_http_res_rep_val(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 4, "res_rep_val"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_RES || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return MAY_LJMP(hlua_http_rep_hdr(L, &htxn->s->txn->rsp, 0));
}
/* This function deletes all the occurrences of an header.
* It is a wrapper for the 2 following functions.
*/
__LJMP static inline int hlua_http_del_hdr(lua_State *L, struct http_msg *msg)
{
size_t len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &len));
struct htx *htx = htxbuf(&msg->chn->buf);
struct http_hdr_ctx ctx;
ctx.blk = NULL;
while (http_find_header(htx, ist2(name, len), &ctx, 1))
http_remove_header(htx, &ctx);
return 0;
}
__LJMP static int hlua_http_req_del_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "req_del_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return hlua_http_del_hdr(L, &htxn->s->txn->req);
}
__LJMP static int hlua_http_res_del_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "res_del_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_RES || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return hlua_http_del_hdr(L, &htxn->s->txn->rsp);
}
/* This function adds an header. It is a wrapper used by
* the 2 following functions.
*/
__LJMP static inline int hlua_http_add_hdr(lua_State *L, struct http_msg *msg)
{
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
size_t value_len;
const char *value = MAY_LJMP(luaL_checklstring(L, 3, &value_len));
struct htx *htx = htxbuf(&msg->chn->buf);
lua_pushboolean(L, http_add_header(htx, ist2(name, name_len),
ist2(value, value_len)));
return 0;
}
__LJMP static int hlua_http_req_add_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "req_add_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return hlua_http_add_hdr(L, &htxn->s->txn->req);
}
__LJMP static int hlua_http_res_add_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "res_add_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_RES || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
return hlua_http_add_hdr(L, &htxn->s->txn->rsp);
}
static int hlua_http_req_set_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "req_set_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
hlua_http_del_hdr(L, &htxn->s->txn->req);
return hlua_http_add_hdr(L, &htxn->s->txn->req);
}
static int hlua_http_res_set_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "res_set_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
if (htxn->dir != SMP_OPT_DIR_RES || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
hlua_http_del_hdr(L, &htxn->s->txn->rsp);
return hlua_http_add_hdr(L, &htxn->s->txn->rsp);
}
/* This function set the method. */
static int hlua_http_req_set_meth(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
lua_pushboolean(L, http_req_replace_stline(0, name, name_len, htxn->p, htxn->s) != -1);
return 1;
}
/* This function set the method. */
static int hlua_http_req_set_path(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
lua_pushboolean(L, http_req_replace_stline(1, name, name_len, htxn->p, htxn->s) != -1);
return 1;
}
/* This function set the query-string. */
static int hlua_http_req_set_query(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
/* Check length. */
if (name_len > trash.size - 1) {
lua_pushboolean(L, 0);
return 1;
}
/* Add the mark question as prefix. */
chunk_reset(&trash);
trash.area[trash.data++] = '?';
memcpy(trash.area + trash.data, name, name_len);
trash.data += name_len;
lua_pushboolean(L,
http_req_replace_stline(2, trash.area, trash.data, htxn->p, htxn->s) != -1);
return 1;
}
/* This function set the uri. */
static int hlua_http_req_set_uri(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
if (htxn->dir != SMP_OPT_DIR_REQ || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
lua_pushboolean(L, http_req_replace_stline(3, name, name_len, htxn->p, htxn->s) != -1);
return 1;
}
/* This function set the response code & optionally reason. */
static int hlua_http_res_set_status(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
unsigned int code = MAY_LJMP(luaL_checkinteger(L, 2));
const char *str = MAY_LJMP(luaL_optlstring(L, 3, NULL, NULL));
const struct ist reason = ist2(str, (str ? strlen(str) : 0));
if (htxn->dir != SMP_OPT_DIR_RES || !IS_HTX_STRM(htxn->s))
WILL_LJMP(lua_error(L));
http_res_set_status(code, reason, htxn->s);
return 0;
}
/*
*
*
* Class TXN
*
*
*/
/* Returns a struct hlua_session if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_txn *hlua_checktxn(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_txn_ref));
}
__LJMP static int hlua_set_var(lua_State *L)
{
struct hlua_txn *htxn;
const char *name;
size_t len;
struct sample smp;
if (lua_gettop(L) < 3 || lua_gettop(L) > 4)
WILL_LJMP(luaL_error(L, "'set_var' needs between 3 and 4 arguments"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
htxn = MAY_LJMP(hlua_checktxn(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
/* Converts the third argument in a sample. */
memset(&smp, 0, sizeof(smp));
hlua_lua2smp(L, 3, &smp);
/* Store the sample in a variable. */
smp_set_owner(&smp, htxn->p, htxn->s->sess, htxn->s, htxn->dir & SMP_OPT_DIR);
if (lua_gettop(L) == 4 && lua_toboolean(L, 4))
lua_pushboolean(L, vars_set_by_name_ifexist(name, len, &smp) != 0);
else
lua_pushboolean(L, vars_set_by_name(name, len, &smp) != 0);
return 1;
}
__LJMP static int hlua_unset_var(lua_State *L)
{
struct hlua_txn *htxn;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "unset_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
htxn = MAY_LJMP(hlua_checktxn(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
/* Unset the variable. */
smp_set_owner(&smp, htxn->p, htxn->s->sess, htxn->s, htxn->dir & SMP_OPT_DIR);
lua_pushboolean(L, vars_unset_by_name_ifexist(name, len, &smp) != 0);
return 1;
}
__LJMP static int hlua_get_var(lua_State *L)
{
struct hlua_txn *htxn;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "get_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
htxn = MAY_LJMP(hlua_checktxn(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
smp_set_owner(&smp, htxn->p, htxn->s->sess, htxn->s, htxn->dir & SMP_OPT_DIR);
if (!vars_get_by_name(name, len, &smp)) {
lua_pushnil(L);
return 1;
}
return hlua_smp2lua(L, &smp);
}
__LJMP static int hlua_set_priv(lua_State *L)
{
struct hlua *hlua;
MAY_LJMP(check_args(L, 2, "set_priv"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
MAY_LJMP(hlua_checktxn(L, 1));
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua)
return 0;
/* Remove previous value. */
luaL_unref(L, LUA_REGISTRYINDEX, hlua->Mref);
/* Get and store new value. */
lua_pushvalue(L, 2); /* Copy the element 2 at the top of the stack. */
hlua->Mref = luaL_ref(L, LUA_REGISTRYINDEX); /* pop the previously pushed value. */
return 0;
}
__LJMP static int hlua_get_priv(lua_State *L)
{
struct hlua *hlua;
MAY_LJMP(check_args(L, 1, "get_priv"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
MAY_LJMP(hlua_checktxn(L, 1));
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua) {
lua_pushnil(L);
return 1;
}
/* Push configuration index in the stack. */
lua_rawgeti(L, LUA_REGISTRYINDEX, hlua->Mref);
return 1;
}
/* Create stack entry containing a class TXN. This function
* return 0 if the stack does not contains free slots,
* otherwise it returns 1.
*/
static int hlua_txn_new(lua_State *L, struct stream *s, struct proxy *p, int dir, int flags)
{
struct hlua_txn *htxn;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* NOTE: The allocation never fails. The failure
* throw an error, and the function never returns.
* if the throw is not available, the process is aborted.
*/
/* Create the object: obj[0] = userdata. */
lua_newtable(L);
htxn = lua_newuserdata(L, sizeof(*htxn));
lua_rawseti(L, -2, 0);
htxn->s = s;
htxn->p = p;
htxn->dir = dir;
htxn->flags = flags;
/* Create the "f" field that contains a list of fetches. */
lua_pushstring(L, "f");
if (!hlua_fetches_new(L, htxn, HLUA_F_MAY_USE_HTTP))
return 0;
lua_rawset(L, -3);
/* Create the "sf" field that contains a list of stringsafe fetches. */
lua_pushstring(L, "sf");
if (!hlua_fetches_new(L, htxn, HLUA_F_MAY_USE_HTTP | HLUA_F_AS_STRING))
return 0;
lua_rawset(L, -3);
/* Create the "c" field that contains a list of converters. */
lua_pushstring(L, "c");
if (!hlua_converters_new(L, htxn, 0))
return 0;
lua_rawset(L, -3);
/* Create the "sc" field that contains a list of stringsafe converters. */
lua_pushstring(L, "sc");
if (!hlua_converters_new(L, htxn, HLUA_F_AS_STRING))
return 0;
lua_rawset(L, -3);
/* Create the "req" field that contains the request channel object. */
lua_pushstring(L, "req");
if (!hlua_channel_new(L, &s->req))
return 0;
lua_rawset(L, -3);
/* Create the "res" field that contains the response channel object. */
lua_pushstring(L, "res");
if (!hlua_channel_new(L, &s->res))
return 0;
lua_rawset(L, -3);
/* Creates the HTTP object is the current proxy allows http. */
lua_pushstring(L, "http");
if (IS_HTX_STRM(s)) {
if (!hlua_http_new(L, htxn))
return 0;
}
else
lua_pushnil(L);
lua_rawset(L, -3);
/* Pop a class sesison metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_txn_ref);
lua_setmetatable(L, -2);
return 1;
}
__LJMP static int hlua_txn_deflog(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "deflog"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, htxn->s->logs.level, msg);
return 0;
}
__LJMP static int hlua_txn_log(lua_State *L)
{
int level;
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "log"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
level = MAY_LJMP(luaL_checkinteger(L, 2));
msg = MAY_LJMP(luaL_checkstring(L, 3));
if (level < 0 || level >= NB_LOG_LEVELS)
WILL_LJMP(luaL_argerror(L, 1, "Invalid loglevel."));
hlua_sendlog(htxn->s->be, level, msg);
return 0;
}
__LJMP static int hlua_txn_log_debug(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "Debug"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, LOG_DEBUG, msg);
return 0;
}
__LJMP static int hlua_txn_log_info(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "Info"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, LOG_INFO, msg);
return 0;
}
__LJMP static int hlua_txn_log_warning(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "Warning"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, LOG_WARNING, msg);
return 0;
}
__LJMP static int hlua_txn_log_alert(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "Alert"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, LOG_ALERT, msg);
return 0;
}
__LJMP static int hlua_txn_set_loglevel(lua_State *L)
{
struct hlua_txn *htxn;
int ll;
MAY_LJMP(check_args(L, 2, "set_loglevel"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
ll = MAY_LJMP(luaL_checkinteger(L, 2));
if (ll < 0 || ll > 7)
WILL_LJMP(luaL_argerror(L, 2, "Bad log level. It must be between 0 and 7"));
htxn->s->logs.level = ll;
return 0;
}
__LJMP static int hlua_txn_set_tos(lua_State *L)
{
struct hlua_txn *htxn;
int tos;
MAY_LJMP(check_args(L, 2, "set_tos"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
tos = MAY_LJMP(luaL_checkinteger(L, 2));
conn_set_tos(objt_conn(htxn->s->sess->origin), tos);
return 0;
}
__LJMP static int hlua_txn_set_mark(lua_State *L)
{
struct hlua_txn *htxn;
int mark;
MAY_LJMP(check_args(L, 2, "set_mark"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
mark = MAY_LJMP(luaL_checkinteger(L, 2));
conn_set_mark(objt_conn(htxn->s->sess->origin), mark);
return 0;
}
__LJMP static int hlua_txn_set_priority_class(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "set_priority_class"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
htxn->s->priority_class = queue_limit_class(MAY_LJMP(luaL_checkinteger(L, 2)));
return 0;
}
__LJMP static int hlua_txn_set_priority_offset(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "set_priority_offset"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
htxn->s->priority_offset = queue_limit_offset(MAY_LJMP(luaL_checkinteger(L, 2)));
return 0;
}
/* Forward the Reply object to the client. This function converts the reply in
* HTX an push it to into the response channel. It is response to forward the
* message and terminate the transaction. It returns 1 on success and 0 on
* error. The Reply must be on top of the stack.
*/
__LJMP static int hlua_txn_forward_reply(lua_State *L, struct stream *s)
{
struct htx *htx;
struct htx_sl *sl;
struct h1m h1m;
const char *status, *reason, *body;
size_t status_len, reason_len, body_len;
int ret, code, flags;
code = 200;
status = "200";
status_len = 3;
ret = lua_getfield(L, -1, "status");
if (ret == LUA_TNUMBER) {
code = lua_tointeger(L, -1);
status = lua_tolstring(L, -1, &status_len);
}
lua_pop(L, 1);
reason = http_get_reason(code);
reason_len = strlen(reason);
ret = lua_getfield(L, -1, "reason");
if (ret == LUA_TSTRING)
reason = lua_tolstring(L, -1, &reason_len);
lua_pop(L, 1);
body = NULL;
body_len = 0;
ret = lua_getfield(L, -1, "body");
if (ret == LUA_TSTRING)
body = lua_tolstring(L, -1, &body_len);
lua_pop(L, 1);
/* Prepare the response before inserting the headers */
h1m_init_res(&h1m);
htx = htx_from_buf(&s->res.buf);
channel_htx_truncate(&s->res, htx);
if (s->txn->req.flags & HTTP_MSGF_VER_11) {
flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11);
sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"),
ist2(status, status_len), ist2(reason, reason_len));
}
else {
flags = HTX_SL_F_IS_RESP;
sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.0"),
ist2(status, status_len), ist2(reason, reason_len));
}
if (!sl)
goto fail;
sl->info.res.status = code;
/* Push in the stack the "headers" entry. */
ret = lua_getfield(L, -1, "headers");
if (ret != LUA_TTABLE)
goto skip_headers;
lua_pushnil(L);
while (lua_next(L, -2) != 0) {
struct ist name, value;
const char *n, *v;
size_t nlen, vlen;
if (!lua_isstring(L, -2) || !lua_istable(L, -1)) {
/* Skip element if the key is not a string or if the value is not a table */
goto next_hdr;
}
n = lua_tolstring(L, -2, &nlen);
name = ist2(n, nlen);
if (isteqi(name, ist("content-length"))) {
/* Always skip content-length header. It will be added
* later with the correct len
*/
goto next_hdr;
}
/* Loop on header's values */
lua_pushnil(L);
while (lua_next(L, -2)) {
if (!lua_isstring(L, -1)) {
/* Skip the value if it is not a string */
goto next_value;
}
v = lua_tolstring(L, -1, &vlen);
value = ist2(v, vlen);
if (isteqi(name, ist("transfer-encoding")))
h1_parse_xfer_enc_header(&h1m, value);
if (!htx_add_header(htx, ist2(n, nlen), ist2(v, vlen)))
goto fail;
next_value:
lua_pop(L, 1);
}
next_hdr:
lua_pop(L, 1);
}
skip_headers:
lua_pop(L, 1);
/* Update h1m flags: CLEN is set if CHNK is not present */
if (!(h1m.flags & H1_MF_CHNK)) {
const char *clen = ultoa(body_len);
h1m.flags |= H1_MF_CLEN;
if (!htx_add_header(htx, ist("content-length"), ist(clen)))
goto fail;
}
if (h1m.flags & (H1_MF_CLEN|H1_MF_CHNK))
h1m.flags |= H1_MF_XFER_LEN;
/* Update HTX start-line flags */
if (h1m.flags & H1_MF_XFER_ENC)
flags |= HTX_SL_F_XFER_ENC;
if (h1m.flags & H1_MF_XFER_LEN) {
flags |= HTX_SL_F_XFER_LEN;
if (h1m.flags & H1_MF_CHNK)
flags |= HTX_SL_F_CHNK;
else if (h1m.flags & H1_MF_CLEN)
flags |= HTX_SL_F_CLEN;
if (h1m.body_len == 0)
flags |= HTX_SL_F_BODYLESS;
}
sl->flags |= flags;
if (!htx_add_endof(htx, HTX_BLK_EOH) ||
(body_len && !htx_add_data_atonce(htx, ist2(body, body_len))))
goto fail;
htx->flags |= HTX_FL_EOM;
/* Now, forward the response and terminate the transaction */
s->txn->status = code;
htx_to_buf(htx, &s->res.buf);
if (!http_forward_proxy_resp(s, 1))
goto fail;
return 1;
fail:
channel_htx_truncate(&s->res, htx);
return 0;
}
/* Terminate a transaction if called from a lua action. For TCP streams,
* processing is just aborted. Nothing is returned to the client and all
* arguments are ignored. For HTTP streams, if a reply is passed as argument, it
* is forwarded to the client before terminating the transaction. On success,
* the function exits with ACT_RET_DONE code. If an error occurred, it exits
* with ACT_RET_ERR code. If this function is not called from a lua action, it
* just exits without any processing.
*/
__LJMP static int hlua_txn_done(lua_State *L)
{
struct hlua_txn *htxn;
struct stream *s;
int finst;
htxn = MAY_LJMP(hlua_checktxn(L, 1));
/* If the flags NOTERM is set, we cannot terminate the session, so we
* just end the execution of the current lua code. */
if (htxn->flags & HLUA_TXN_NOTERM)
WILL_LJMP(hlua_done(L));
s = htxn->s;
if (!IS_HTX_STRM(htxn->s)) {
struct channel *req = &s->req;
struct channel *res = &s->res;
channel_auto_read(req);
channel_abort(req);
channel_auto_close(req);
channel_erase(req);
res->wex = tick_add_ifset(now_ms, res->wto);
channel_auto_read(res);
channel_auto_close(res);
channel_shutr_now(res);
finst = ((htxn->dir == SMP_OPT_DIR_REQ) ? SF_FINST_R : SF_FINST_D);
goto done;
}
if (lua_gettop(L) == 1 || !lua_istable(L, 2)) {
/* No reply or invalid reply */
s->txn->status = 0;
http_reply_and_close(s, 0, NULL);
}
else {
/* Remove extra args to have the reply on top of the stack */
if (lua_gettop(L) > 2)
lua_pop(L, lua_gettop(L) - 2);
if (!hlua_txn_forward_reply(L, s)) {
if (!(s->flags & SF_ERR_MASK))
s->flags |= SF_ERR_PRXCOND;
lua_pushinteger(L, ACT_RET_ERR);
WILL_LJMP(hlua_done(L));
return 0; /* Never reached */
}
}
finst = ((htxn->dir == SMP_OPT_DIR_REQ) ? SF_FINST_R : SF_FINST_H);
if (htxn->dir == SMP_OPT_DIR_REQ) {
/* let's log the request time */
s->logs.tv_request = now;
if (s->sess->fe == s->be) /* report it if the request was intercepted by the frontend */
_HA_ATOMIC_INC(&s->sess->fe->fe_counters.intercepted_req);
}
done:
if (!(s->flags & SF_ERR_MASK))
s->flags |= SF_ERR_LOCAL;
if (!(s->flags & SF_FINST_MASK))
s->flags |= finst;
lua_pushinteger(L, ACT_RET_ABRT);
WILL_LJMP(hlua_done(L));
return 0;
}
/*
*
*
* Class REPLY
*
*
*/
/* Pushes the TXN reply onto the top of the stack. If the stask does not have a
* free slots, the function fails and returns 0;
*/
static int hlua_txn_reply_new(lua_State *L)
{
struct hlua_txn *htxn;
const char *reason, *body = NULL;
int ret, status;
htxn = MAY_LJMP(hlua_checktxn(L, 1));
if (!IS_HTX_STRM(htxn->s)) {
hlua_pusherror(L, "txn object is not an HTTP transaction.");
WILL_LJMP(lua_error(L));
}
/* Default value */
status = 200;
reason = http_get_reason(status);
if (lua_istable(L, 2)) {
/* load status and reason from the table argument at index 2 */
ret = lua_getfield(L, 2, "status");
if (ret == LUA_TNIL)
goto reason;
else if (ret != LUA_TNUMBER) {
/* invalid status: ignore the reason */
goto body;
}
status = lua_tointeger(L, -1);
reason:
lua_pop(L, 1); /* restore the stack: remove status */
ret = lua_getfield(L, 2, "reason");
if (ret == LUA_TSTRING)
reason = lua_tostring(L, -1);
body:
lua_pop(L, 1); /* restore the stack: remove invalid status or reason */
ret = lua_getfield(L, 2, "body");
if (ret == LUA_TSTRING)
body = lua_tostring(L, -1);
lua_pop(L, 1); /* restore the stack: remove body */
}
/* Create the Reply table */
lua_newtable(L);
/* Add status element */
lua_pushstring(L, "status");
lua_pushinteger(L, status);
lua_settable(L, -3);
/* Add reason element */
reason = http_get_reason(status);
lua_pushstring(L, "reason");
lua_pushstring(L, reason);
lua_settable(L, -3);
/* Add body element, nil if undefined */
lua_pushstring(L, "body");
if (body)
lua_pushstring(L, body);
else
lua_pushnil(L);
lua_settable(L, -3);
/* Add headers element */
lua_pushstring(L, "headers");
lua_newtable(L);
/* stack: [ txn, <Arg:table>, <Reply:table>, "headers", <headers:table> ] */
if (lua_istable(L, 2)) {
/* load headers from the table argument at index 2. If it is a table, copy it. */
ret = lua_getfield(L, 2, "headers");
if (ret == LUA_TTABLE) {
/* stack: [ ... <headers:table>, <table> ] */
lua_pushnil(L);
while (lua_next(L, -2) != 0) {
/* stack: [ ... <headers:table>, <table>, k, v] */
if (!lua_isstring(L, -1) && !lua_istable(L, -1)) {
/* invalid value type, skip it */
lua_pop(L, 1);
continue;
}
/* Duplicate the key and swap it with the value. */
lua_pushvalue(L, -2);
lua_insert(L, -2);
/* stack: [ ... <headers:table>, <table>, k, k, v ] */
lua_newtable(L);
lua_insert(L, -2);
/* stack: [ ... <headers:table>, <table>, k, k, <inner:table>, v ] */
if (lua_isstring(L, -1)) {
/* push the value in the inner table */
lua_rawseti(L, -2, 1);
}
else { /* table */
lua_pushnil(L);
while (lua_next(L, -2) != 0) {
/* stack: [ ... <headers:table>, <table>, k, k, <inner:table>, <v:table>, k2, v2 ] */
if (!lua_isstring(L, -1)) {
/* invalid value type, skip it*/
lua_pop(L, 1);
continue;
}
/* push the value in the inner table */
lua_rawseti(L, -4, lua_rawlen(L, -4) + 1);
/* stack: [ ... <headers:table>, <table>, k, k, <inner:table>, <v:table>, k2 ] */
}
lua_pop(L, 1);
/* stack: [ ... <headers:table>, <table>, k, k, <inner:table> ] */
}
/* push (k,v) on the stack in the headers table:
* stack: [ ... <headers:table>, <table>, k, k, v ]
*/
lua_settable(L, -5);
/* stack: [ ... <headers:table>, <table>, k ] */
}
}
lua_pop(L, 1);
}
/* stack: [ txn, <Arg:table>, <Reply:table>, "headers", <headers:table> ] */
lua_settable(L, -3);
/* stack: [ txn, <Arg:table>, <Reply:table> ] */
/* Pop a class sesison metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_txn_reply_ref);
lua_setmetatable(L, -2);
return 1;
}
/* Set the reply status code, and optionally the reason. If no reason is
* provided, the default one corresponding to the status code is used.
*/
__LJMP static int hlua_txn_reply_set_status(lua_State *L)
{
int status = MAY_LJMP(luaL_checkinteger(L, 2));
const char *reason = MAY_LJMP(luaL_optlstring(L, 3, NULL, NULL));
/* First argument (self) must be a table */
luaL_checktype(L, 1, LUA_TTABLE);
if (status < 100 || status > 599) {
lua_pushboolean(L, 0);
return 1;
}
if (!reason)
reason = http_get_reason(status);
lua_pushinteger(L, status);
lua_setfield(L, 1, "status");
lua_pushstring(L, reason);
lua_setfield(L, 1, "reason");
lua_pushboolean(L, 1);
return 1;
}
/* Add a header into the reply object. Each header name is associated to an
* array of values in the "headers" table. If the header name is not found, a
* new entry is created.
*/
__LJMP static int hlua_txn_reply_add_header(lua_State *L)
{
const char *name = MAY_LJMP(luaL_checkstring(L, 2));
const char *value = MAY_LJMP(luaL_checkstring(L, 3));
int ret;
/* First argument (self) must be a table */
luaL_checktype(L, 1, LUA_TTABLE);
/* Push in the stack the "headers" entry. */
ret = lua_getfield(L, 1, "headers");
if (ret != LUA_TTABLE) {
hlua_pusherror(L, "Reply['headers'] is expected to a an array. %s found", lua_typename(L, ret));
WILL_LJMP(lua_error(L));
}
/* check if the header is already registered. If not, register it. */
ret = lua_getfield(L, -1, name);
if (ret == LUA_TNIL) {
/* Entry not found. */
lua_pop(L, 1); /* remove the nil. The "headers" table is the top of the stack. */
/* Insert the new header name in the array in the top of the stack.
* It left the new array in the top of the stack.
*/
lua_newtable(L);
lua_pushstring(L, name);
lua_pushvalue(L, -2);
lua_settable(L, -4);
}
else if (ret != LUA_TTABLE) {
hlua_pusherror(L, "Reply['headers']['%s'] is expected to be an array. %s found", name, lua_typename(L, ret));
WILL_LJMP(lua_error(L));
}
/* Now the top of thestack is an array of values. We push
* the header value as new entry.
*/
lua_pushstring(L, value);
ret = lua_rawlen(L, -2);
lua_rawseti(L, -2, ret + 1);
lua_pushboolean(L, 1);
return 1;
}
/* Remove all occurrences of a given header name. */
__LJMP static int hlua_txn_reply_del_header(lua_State *L)
{
const char *name = MAY_LJMP(luaL_checkstring(L, 2));
int ret;
/* First argument (self) must be a table */
luaL_checktype(L, 1, LUA_TTABLE);
/* Push in the stack the "headers" entry. */
ret = lua_getfield(L, 1, "headers");
if (ret != LUA_TTABLE) {
hlua_pusherror(L, "Reply['headers'] is expected to be an array. %s found", lua_typename(L, ret));
WILL_LJMP(lua_error(L));
}
lua_pushstring(L, name);
lua_pushnil(L);
lua_settable(L, -3);
lua_pushboolean(L, 1);
return 1;
}
/* Set the reply's body. Overwrite any existing entry. */
__LJMP static int hlua_txn_reply_set_body(lua_State *L)
{
const char *payload = MAY_LJMP(luaL_checkstring(L, 2));
/* First argument (self) must be a table */
luaL_checktype(L, 1, LUA_TTABLE);
lua_pushstring(L, payload);
lua_setfield(L, 1, "body");
lua_pushboolean(L, 1);
return 1;
}
__LJMP static int hlua_log(lua_State *L)
{
int level;
const char *msg;
MAY_LJMP(check_args(L, 2, "log"));
level = MAY_LJMP(luaL_checkinteger(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
if (level < 0 || level >= NB_LOG_LEVELS)
WILL_LJMP(luaL_argerror(L, 1, "Invalid loglevel."));
hlua_sendlog(NULL, level, msg);
return 0;
}
__LJMP static int hlua_log_debug(lua_State *L)
{
const char *msg;
MAY_LJMP(check_args(L, 1, "debug"));
msg = MAY_LJMP(luaL_checkstring(L, 1));
hlua_sendlog(NULL, LOG_DEBUG, msg);
return 0;
}
__LJMP static int hlua_log_info(lua_State *L)
{
const char *msg;
MAY_LJMP(check_args(L, 1, "info"));
msg = MAY_LJMP(luaL_checkstring(L, 1));
hlua_sendlog(NULL, LOG_INFO, msg);
return 0;
}
__LJMP static int hlua_log_warning(lua_State *L)
{
const char *msg;
MAY_LJMP(check_args(L, 1, "warning"));
msg = MAY_LJMP(luaL_checkstring(L, 1));
hlua_sendlog(NULL, LOG_WARNING, msg);
return 0;
}
__LJMP static int hlua_log_alert(lua_State *L)
{
const char *msg;
MAY_LJMP(check_args(L, 1, "alert"));
msg = MAY_LJMP(luaL_checkstring(L, 1));
hlua_sendlog(NULL, LOG_ALERT, msg);
return 0;
}
__LJMP static int hlua_sleep_yield(lua_State *L, int status, lua_KContext ctx)
{
int wakeup_ms = lua_tointeger(L, -1);
if (now_ms < wakeup_ms)
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_sleep_yield, wakeup_ms, 0));
return 0;
}
__LJMP static int hlua_sleep(lua_State *L)
{
unsigned int delay;
unsigned int wakeup_ms;
MAY_LJMP(check_args(L, 1, "sleep"));
delay = MAY_LJMP(luaL_checkinteger(L, 1)) * 1000;
wakeup_ms = tick_add(now_ms, delay);
lua_pushinteger(L, wakeup_ms);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_sleep_yield, wakeup_ms, 0));
return 0;
}
__LJMP static int hlua_msleep(lua_State *L)
{
unsigned int delay;
unsigned int wakeup_ms;
MAY_LJMP(check_args(L, 1, "msleep"));
delay = MAY_LJMP(luaL_checkinteger(L, 1));
wakeup_ms = tick_add(now_ms, delay);
lua_pushinteger(L, wakeup_ms);
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_sleep_yield, wakeup_ms, 0));
return 0;
}
/* This functionis an LUA binding. it permits to give back
* the hand at the HAProxy scheduler. It is used when the
* LUA processing consumes a lot of time.
*/
__LJMP static int hlua_yield_yield(lua_State *L, int status, lua_KContext ctx)
{
return 0;
}
__LJMP static int hlua_yield(lua_State *L)
{
MAY_LJMP(hlua_yieldk(L, 0, 0, hlua_yield_yield, TICK_ETERNITY, HLUA_CTRLYIELD));
return 0;
}
/* This function change the nice of the currently executed
* task. It is used set low or high priority at the current
* task.
*/
__LJMP static int hlua_set_nice(lua_State *L)
{
struct hlua *hlua;
int nice;
MAY_LJMP(check_args(L, 1, "set_nice"));
nice = MAY_LJMP(luaL_checkinteger(L, 1));
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
/* If the task is not set, I'm in a start mode. */
if (!hlua || !hlua->task)
return 0;
if (nice < -1024)
nice = -1024;
else if (nice > 1024)
nice = 1024;
hlua->task->nice = nice;
return 0;
}
/* This function is used as a callback of a task. It is called by the
* HAProxy task subsystem when the task is awaked. The LUA runtime can
* return an E_AGAIN signal, the emmiter of this signal must set a
* signal to wake the task.
*
* Task wrapper are longjmp safe because the only one Lua code
* executed is the safe hlua_ctx_resume();
*/
struct task *hlua_process_task(struct task *task, void *context, unsigned int state)
{
struct hlua *hlua = context;
enum hlua_exec status;
if (task->thread_mask == MAX_THREADS_MASK)
task_set_affinity(task, tid_bit);
/* If it is the first call to the task, we must initialize the
* execution timeouts.
*/
if (!HLUA_IS_RUNNING(hlua))
hlua->max_time = hlua_timeout_task;
/* Execute the Lua code. */
status = hlua_ctx_resume(hlua, 1);
switch (status) {
/* finished or yield */
case HLUA_E_OK:
hlua_ctx_destroy(hlua);
task_destroy(task);
task = NULL;
break;
case HLUA_E_AGAIN: /* co process or timeout wake me later. */
notification_gc(&hlua->com);
task->expire = hlua->wake_time;
break;
/* finished with error. */
case HLUA_E_ERRMSG:
SEND_ERR(NULL, "Lua task: %s.\n", lua_tostring(hlua->T, -1));
hlua_ctx_destroy(hlua);
task_destroy(task);
task = NULL;
break;
case HLUA_E_ERR:
default:
SEND_ERR(NULL, "Lua task: unknown error.\n");
hlua_ctx_destroy(hlua);
task_destroy(task);
task = NULL;
break;
}
return task;
}
/* This function is an LUA binding that register LUA function to be
* executed after the HAProxy configuration parsing and before the
* HAProxy scheduler starts. This function expect only one LUA
* argument that is a function. This function returns nothing, but
* throws if an error is encountered.
*/
__LJMP static int hlua_register_init(lua_State *L)
{
struct hlua_init_function *init;
int ref;
MAY_LJMP(check_args(L, 1, "register_init"));
ref = MAY_LJMP(hlua_checkfunction(L, 1));
init = calloc(1, sizeof(*init));
if (!init)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
init->function_ref = ref;
LIST_APPEND(&hlua_init_functions[hlua_state_id], &init->l);
return 0;
}
/* This functio is an LUA binding. It permits to register a task
* executed in parallel of the main HAroxy activity. The task is
* created and it is set in the HAProxy scheduler. It can be called
* from the "init" section, "post init" or during the runtime.
*
* Lua prototype:
*
* <none> core.register_task(<function>)
*/
static int hlua_register_task(lua_State *L)
{
struct hlua *hlua = NULL;
struct task *task = NULL;
int ref;
int state_id;
MAY_LJMP(check_args(L, 1, "register_task"));
ref = MAY_LJMP(hlua_checkfunction(L, 1));
/* Get the reference state. If the reference is NULL, L is the master
* state, otherwise hlua->T is.
*/
hlua = hlua_gethlua(L);
if (hlua)
/* we are in runtime processing */
state_id = hlua->state_id;
else
/* we are in initialization mode */
state_id = hlua_state_id;
hlua = pool_alloc(pool_head_hlua);
if (!hlua)
goto alloc_error;
HLUA_INIT(hlua);
/* We are in the common lua state, execute the task anywhere,
* otherwise, inherit the current thread identifier
*/
if (state_id == 0)
task = task_new(MAX_THREADS_MASK);
else
task = task_new(tid_bit);
if (!task)
goto alloc_error;
task->context = hlua;
task->process = hlua_process_task;
if (!hlua_ctx_init(hlua, state_id, task, 1))
goto alloc_error;
/* Restore the function in the stack. */
lua_rawgeti(hlua->T, LUA_REGISTRYINDEX, ref);
hlua->nargs = 0;
/* Schedule task. */
task_schedule(task, now_ms);
return 0;
alloc_error:
task_destroy(task);
hlua_ctx_destroy(hlua);
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
return 0; /* Never reached */
}
/* Wrapper called by HAProxy to execute an LUA converter. This wrapper
* doesn't allow "yield" functions because the HAProxy engine cannot
* resume converters.
*/
static int hlua_sample_conv_wrapper(const struct arg *arg_p, struct sample *smp, void *private)
{
struct hlua_function *fcn = private;
struct stream *stream = smp->strm;
const char *error;
if (!stream)
return 0;
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!stream->hlua) {
struct hlua *hlua;
hlua = pool_alloc(pool_head_hlua);
if (!hlua) {
SEND_ERR(stream->be, "Lua converter '%s': can't initialize Lua context.\n", fcn->name);
return 0;
}
HLUA_INIT(hlua);
stream->hlua = hlua;
if (!hlua_ctx_init(stream->hlua, fcn_ref_to_stack_id(fcn), stream->task, 0)) {
SEND_ERR(stream->be, "Lua converter '%s': can't initialize Lua context.\n", fcn->name);
return 0;
}
}
/* If it is the first run, initialize the data for the call. */
if (!HLUA_IS_RUNNING(stream->hlua)) {
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(stream->hlua)) {
if (lua_type(stream->hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(stream->hlua->T, -1);
else
error = "critical error";
SEND_ERR(stream->be, "Lua converter '%s': %s.\n", fcn->name, error);
return 0;
}
/* Check stack available size. */
if (!lua_checkstack(stream->hlua->T, 1)) {
SEND_ERR(stream->be, "Lua converter '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua);
return 0;
}
/* Restore the function in the stack. */
lua_rawgeti(stream->hlua->T, LUA_REGISTRYINDEX, fcn->function_ref[stream->hlua->state_id]);
/* convert input sample and pust-it in the stack. */
if (!lua_checkstack(stream->hlua->T, 1)) {
SEND_ERR(stream->be, "Lua converter '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua);
return 0;
}
hlua_smp2lua(stream->hlua->T, smp);
stream->hlua->nargs = 1;
/* push keywords in the stack. */
if (arg_p) {
for (; arg_p->type != ARGT_STOP; arg_p++) {
if (!lua_checkstack(stream->hlua->T, 1)) {
SEND_ERR(stream->be, "Lua converter '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua);
return 0;
}
hlua_arg2lua(stream->hlua->T, arg_p);
stream->hlua->nargs++;
}
}
/* We must initialize the execution timeouts. */
stream->hlua->max_time = hlua_timeout_session;
/* At this point the execution is safe. */
RESET_SAFE_LJMP(stream->hlua);
}
/* Execute the function. */
switch (hlua_ctx_resume(stream->hlua, 0)) {
/* finished. */
case HLUA_E_OK:
/* If the stack is empty, the function fails. */
if (lua_gettop(stream->hlua->T) <= 0)
return 0;
/* Convert the returned value in sample. */
hlua_lua2smp(stream->hlua->T, -1, smp);
lua_pop(stream->hlua->T, 1);
return 1;
/* yield. */
case HLUA_E_AGAIN:
SEND_ERR(stream->be, "Lua converter '%s': cannot use yielded functions.\n", fcn->name);
return 0;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(stream->be, "Lua converter '%s': %s.\n",
fcn->name, lua_tostring(stream->hlua->T, -1));
lua_pop(stream->hlua->T, 1);
return 0;
case HLUA_E_ETMOUT:
SEND_ERR(stream->be, "Lua converter '%s': execution timeout.\n", fcn->name);
return 0;
case HLUA_E_NOMEM:
SEND_ERR(stream->be, "Lua converter '%s': out of memory error.\n", fcn->name);
return 0;
case HLUA_E_YIELD:
SEND_ERR(stream->be, "Lua converter '%s': yield functions like core.tcp() or core.sleep() are not allowed.\n", fcn->name);
return 0;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(stream->be, "Lua converter '%s' returns an unknown error.\n", fcn->name);
/* fall through */
default:
return 0;
}
}
/* Wrapper called by HAProxy to execute a sample-fetch. this wrapper
* doesn't allow "yield" functions because the HAProxy engine cannot
* resume sample-fetches. This function will be called by the sample
* fetch engine to call lua-based fetch operations.
*/
static int hlua_sample_fetch_wrapper(const struct arg *arg_p, struct sample *smp,
const char *kw, void *private)
{
struct hlua_function *fcn = private;
struct stream *stream = smp->strm;
const char *error;
unsigned int hflags = HLUA_TXN_NOTERM;
if (!stream)
return 0;
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!stream->hlua) {
struct hlua *hlua;
hlua = pool_alloc(pool_head_hlua);
if (!hlua) {
SEND_ERR(stream->be, "Lua sample-fetch '%s': can't initialize Lua context.\n", fcn->name);
return 0;
}
hlua->T = NULL;
stream->hlua = hlua;
if (!hlua_ctx_init(stream->hlua, fcn_ref_to_stack_id(fcn), stream->task, 0)) {
SEND_ERR(stream->be, "Lua sample-fetch '%s': can't initialize Lua context.\n", fcn->name);
return 0;
}
}
/* If it is the first run, initialize the data for the call. */
if (!HLUA_IS_RUNNING(stream->hlua)) {
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(stream->hlua)) {
if (lua_type(stream->hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(stream->hlua->T, -1);
else
error = "critical error";
SEND_ERR(smp->px, "Lua sample-fetch '%s': %s.\n", fcn->name, error);
return 0;
}
/* Check stack available size. */
if (!lua_checkstack(stream->hlua->T, 2)) {
SEND_ERR(smp->px, "Lua sample-fetch '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua);
return 0;
}
/* Restore the function in the stack. */
lua_rawgeti(stream->hlua->T, LUA_REGISTRYINDEX, fcn->function_ref[stream->hlua->state_id]);
/* push arguments in the stack. */
if (!hlua_txn_new(stream->hlua->T, stream, smp->px, smp->opt & SMP_OPT_DIR, hflags)) {
SEND_ERR(smp->px, "Lua sample-fetch '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua);
return 0;
}
stream->hlua->nargs = 1;
/* push keywords in the stack. */
for (; arg_p && arg_p->type != ARGT_STOP; arg_p++) {
/* Check stack available size. */
if (!lua_checkstack(stream->hlua->T, 1)) {
SEND_ERR(smp->px, "Lua sample-fetch '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua);
return 0;
}
hlua_arg2lua(stream->hlua->T, arg_p);
stream->hlua->nargs++;
}
/* We must initialize the execution timeouts. */
stream->hlua->max_time = hlua_timeout_session;
/* At this point the execution is safe. */
RESET_SAFE_LJMP(stream->hlua);
}
/* Execute the function. */
switch (hlua_ctx_resume(stream->hlua, 0)) {
/* finished. */
case HLUA_E_OK:
/* If the stack is empty, the function fails. */
if (lua_gettop(stream->hlua->T) <= 0)
return 0;
/* Convert the returned value in sample. */
hlua_lua2smp(stream->hlua->T, -1, smp);
lua_pop(stream->hlua->T, 1);
/* Set the end of execution flag. */
smp->flags &= ~SMP_F_MAY_CHANGE;
return 1;
/* yield. */
case HLUA_E_AGAIN:
SEND_ERR(smp->px, "Lua sample-fetch '%s': cannot use yielded functions.\n", fcn->name);
return 0;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(smp->px, "Lua sample-fetch '%s': %s.\n",
fcn->name, lua_tostring(stream->hlua->T, -1));
lua_pop(stream->hlua->T, 1);
return 0;
case HLUA_E_ETMOUT:
SEND_ERR(smp->px, "Lua sample-fetch '%s': execution timeout.\n", fcn->name);
return 0;
case HLUA_E_NOMEM:
SEND_ERR(smp->px, "Lua sample-fetch '%s': out of memory error.\n", fcn->name);
return 0;
case HLUA_E_YIELD:
SEND_ERR(smp->px, "Lua sample-fetch '%s': yield not allowed.\n", fcn->name);
return 0;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(smp->px, "Lua sample-fetch '%s' returns an unknown error.\n", fcn->name);
/* fall through */
default:
return 0;
}
}
/* This function is an LUA binding used for registering
* "sample-conv" functions. It expects a converter name used
* in the haproxy configuration file, and an LUA function.
*/
__LJMP static int hlua_register_converters(lua_State *L)
{
struct sample_conv_kw_list *sck;
const char *name;
int ref;
int len;
struct hlua_function *fcn = NULL;
struct sample_conv *sc;
struct buffer *trash;
MAY_LJMP(check_args(L, 2, "register_converters"));
/* First argument : converter name. */
name = MAY_LJMP(luaL_checkstring(L, 1));
/* Second argument : lua function. */
ref = MAY_LJMP(hlua_checkfunction(L, 2));
/* Check if the converter is already registered */
trash = get_trash_chunk();
chunk_printf(trash, "lua.%s", name);
sc = find_sample_conv(trash->area, trash->data);
if (sc != NULL) {
fcn = sc->private;
if (fcn->function_ref[hlua_state_id] != -1) {
ha_warning("Trying to register converter 'lua.%s' more than once. "
"This will become a hard error in version 2.5.\n", name);
}
fcn->function_ref[hlua_state_id] = ref;
return 0;
}
/* Allocate and fill the sample fetch keyword struct. */
sck = calloc(1, sizeof(*sck) + sizeof(struct sample_conv) * 2);
if (!sck)
goto alloc_error;
fcn = new_hlua_function();
if (!fcn)
goto alloc_error;
/* Fill fcn. */
fcn->name = strdup(name);
if (!fcn->name)
goto alloc_error;
fcn->function_ref[hlua_state_id] = ref;
/* List head */
sck->list.n = sck->list.p = NULL;
/* converter keyword. */
len = strlen("lua.") + strlen(name) + 1;
sck->kw[0].kw = calloc(1, len);
if (!sck->kw[0].kw)
goto alloc_error;
snprintf((char *)sck->kw[0].kw, len, "lua.%s", name);
sck->kw[0].process = hlua_sample_conv_wrapper;
sck->kw[0].arg_mask = ARG12(0,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR);
sck->kw[0].val_args = NULL;
sck->kw[0].in_type = SMP_T_STR;
sck->kw[0].out_type = SMP_T_STR;
sck->kw[0].private = fcn;
/* Register this new converter */
sample_register_convs(sck);
return 0;
alloc_error:
release_hlua_function(fcn);
ha_free(&sck);
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
return 0; /* Never reached */
}
/* This function is an LUA binding used for registering
* "sample-fetch" functions. It expects a converter name used
* in the haproxy configuration file, and an LUA function.
*/
__LJMP static int hlua_register_fetches(lua_State *L)
{
const char *name;
int ref;
int len;
struct sample_fetch_kw_list *sfk;
struct hlua_function *fcn = NULL;
struct sample_fetch *sf;
struct buffer *trash;
MAY_LJMP(check_args(L, 2, "register_fetches"));
/* First argument : sample-fetch name. */
name = MAY_LJMP(luaL_checkstring(L, 1));
/* Second argument : lua function. */
ref = MAY_LJMP(hlua_checkfunction(L, 2));
/* Check if the sample-fetch is already registered */
trash = get_trash_chunk();
chunk_printf(trash, "lua.%s", name);
sf = find_sample_fetch(trash->area, trash->data);
if (sf != NULL) {
fcn = sf->private;
if (fcn->function_ref[hlua_state_id] != -1) {
ha_warning("Trying to register sample-fetch 'lua.%s' more than once. "
"This will become a hard error in version 2.5.\n", name);
}
fcn->function_ref[hlua_state_id] = ref;
return 0;
}
/* Allocate and fill the sample fetch keyword struct. */
sfk = calloc(1, sizeof(*sfk) + sizeof(struct sample_fetch) * 2);
if (!sfk)
goto alloc_error;
fcn = new_hlua_function();
if (!fcn)
goto alloc_error;
/* Fill fcn. */
fcn->name = strdup(name);
if (!fcn->name)
goto alloc_error;
fcn->function_ref[hlua_state_id] = ref;
/* List head */
sfk->list.n = sfk->list.p = NULL;
/* sample-fetch keyword. */
len = strlen("lua.") + strlen(name) + 1;
sfk->kw[0].kw = calloc(1, len);
if (!sfk->kw[0].kw)
goto alloc_error;
snprintf((char *)sfk->kw[0].kw, len, "lua.%s", name);
sfk->kw[0].process = hlua_sample_fetch_wrapper;
sfk->kw[0].arg_mask = ARG12(0,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR);
sfk->kw[0].val_args = NULL;
sfk->kw[0].out_type = SMP_T_STR;
sfk->kw[0].use = SMP_USE_HTTP_ANY;
sfk->kw[0].val = 0;
sfk->kw[0].private = fcn;
/* Register this new fetch. */
sample_register_fetches(sfk);
return 0;
alloc_error:
release_hlua_function(fcn);
ha_free(&sfk);
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
return 0; /* Never reached */
}
/* This function is a lua binding to set the wake_time.
*/
__LJMP static int hlua_set_wake_time(lua_State *L)
{
struct hlua *hlua;
unsigned int delay;
unsigned int wakeup_ms;
/* Get hlua struct, or NULL if we execute from main lua state */
hlua = hlua_gethlua(L);
if (!hlua) {
return 0;
}
MAY_LJMP(check_args(L, 1, "wake_time"));
delay = MAY_LJMP(luaL_checkinteger(L, 1));
wakeup_ms = tick_add(now_ms, delay);
hlua->wake_time = wakeup_ms;
return 0;
}
/* This function is a wrapper to execute each LUA function declared as an action
* wrapper during the initialisation period. This function may return any
* ACT_RET_* value. On error ACT_RET_CONT is returned and the action is
* ignored. If the lua action yields, ACT_RET_YIELD is returned. On success, the
* return value is the first element on the stack.
*/
static enum act_return hlua_action(struct act_rule *rule, struct proxy *px,
struct session *sess, struct stream *s, int flags)
{
char **arg;
unsigned int hflags = 0;
int dir, act_ret = ACT_RET_CONT;
const char *error;
switch (rule->from) {
case ACT_F_TCP_REQ_CNT: dir = SMP_OPT_DIR_REQ; break;
case ACT_F_TCP_RES_CNT: dir = SMP_OPT_DIR_RES; break;
case ACT_F_HTTP_REQ: dir = SMP_OPT_DIR_REQ; break;
case ACT_F_HTTP_RES: dir = SMP_OPT_DIR_RES; break;
default:
SEND_ERR(px, "Lua: internal error while execute action.\n");
goto end;
}
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!s->hlua) {
struct hlua *hlua;
hlua = pool_alloc(pool_head_hlua);
if (!hlua) {
SEND_ERR(px, "Lua action '%s': can't initialize Lua context.\n",
rule->arg.hlua_rule->fcn->name);
goto end;
}
HLUA_INIT(hlua);
s->hlua = hlua;
if (!hlua_ctx_init(s->hlua, fcn_ref_to_stack_id(rule->arg.hlua_rule->fcn), s->task, 0)) {
SEND_ERR(px, "Lua action '%s': can't initialize Lua context.\n",
rule->arg.hlua_rule->fcn->name);
goto end;
}
}
/* If it is the first run, initialize the data for the call. */
if (!HLUA_IS_RUNNING(s->hlua)) {
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(s->hlua)) {
if (lua_type(s->hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(s->hlua->T, -1);
else
error = "critical error";
SEND_ERR(px, "Lua function '%s': %s.\n",
rule->arg.hlua_rule->fcn->name, error);
goto end;
}
/* Check stack available size. */
if (!lua_checkstack(s->hlua->T, 1)) {
SEND_ERR(px, "Lua function '%s': full stack.\n",
rule->arg.hlua_rule->fcn->name);
RESET_SAFE_LJMP(s->hlua);
goto end;
}
/* Restore the function in the stack. */
lua_rawgeti(s->hlua->T, LUA_REGISTRYINDEX, rule->arg.hlua_rule->fcn->function_ref[s->hlua->state_id]);
/* Create and and push object stream in the stack. */
if (!hlua_txn_new(s->hlua->T, s, px, dir, hflags)) {
SEND_ERR(px, "Lua function '%s': full stack.\n",
rule->arg.hlua_rule->fcn->name);
RESET_SAFE_LJMP(s->hlua);
goto end;
}
s->hlua->nargs = 1;
/* push keywords in the stack. */
for (arg = rule->arg.hlua_rule->args; arg && *arg; arg++) {
if (!lua_checkstack(s->hlua->T, 1)) {
SEND_ERR(px, "Lua function '%s': full stack.\n",
rule->arg.hlua_rule->fcn->name);
RESET_SAFE_LJMP(s->hlua);
goto end;
}
lua_pushstring(s->hlua->T, *arg);
s->hlua->nargs++;
}
/* Now the execution is safe. */
RESET_SAFE_LJMP(s->hlua);
/* We must initialize the execution timeouts. */
s->hlua->max_time = hlua_timeout_session;
}
/* Execute the function. */
switch (hlua_ctx_resume(s->hlua, !(flags & ACT_OPT_FINAL))) {
/* finished. */
case HLUA_E_OK:
/* Catch the return value */
if (lua_gettop(s->hlua->T) > 0)
act_ret = lua_tointeger(s->hlua->T, -1);
/* Set timeout in the required channel. */
if (act_ret == ACT_RET_YIELD) {
if (flags & ACT_OPT_FINAL)
goto err_yield;
if (dir == SMP_OPT_DIR_REQ)
s->req.analyse_exp = tick_first((tick_is_expired(s->req.analyse_exp, now_ms) ? 0 : s->req.analyse_exp),
s->hlua->wake_time);
else
s->res.analyse_exp = tick_first((tick_is_expired(s->res.analyse_exp, now_ms) ? 0 : s->res.analyse_exp),
s->hlua->wake_time);
}
goto end;
/* yield. */
case HLUA_E_AGAIN:
/* Set timeout in the required channel. */
if (dir == SMP_OPT_DIR_REQ)
s->req.analyse_exp = tick_first((tick_is_expired(s->req.analyse_exp, now_ms) ? 0 : s->req.analyse_exp),
s->hlua->wake_time);
else
s->res.analyse_exp = tick_first((tick_is_expired(s->res.analyse_exp, now_ms) ? 0 : s->res.analyse_exp),
s->hlua->wake_time);
/* Some actions can be wake up when a "write" event
* is detected on a response channel. This is useful
* only for actions targeted on the requests.
*/
if (HLUA_IS_WAKERESWR(s->hlua))
s->res.flags |= CF_WAKE_WRITE;
if (HLUA_IS_WAKEREQWR(s->hlua))
s->req.flags |= CF_WAKE_WRITE;
act_ret = ACT_RET_YIELD;
goto end;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(px, "Lua function '%s': %s.\n",
rule->arg.hlua_rule->fcn->name, lua_tostring(s->hlua->T, -1));
lua_pop(s->hlua->T, 1);
goto end;
case HLUA_E_ETMOUT:
SEND_ERR(px, "Lua function '%s': execution timeout.\n", rule->arg.hlua_rule->fcn->name);
goto end;
case HLUA_E_NOMEM:
SEND_ERR(px, "Lua function '%s': out of memory error.\n", rule->arg.hlua_rule->fcn->name);
goto end;
case HLUA_E_YIELD:
err_yield:
act_ret = ACT_RET_CONT;
SEND_ERR(px, "Lua function '%s': aborting Lua processing on expired timeout.\n",
rule->arg.hlua_rule->fcn->name);
goto end;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(px, "Lua function '%s' return an unknown error.\n",
rule->arg.hlua_rule->fcn->name);
default:
goto end;
}
end:
if (act_ret != ACT_RET_YIELD && s->hlua)
s->hlua->wake_time = TICK_ETERNITY;
return act_ret;
}
struct task *hlua_applet_wakeup(struct task *t, void *context, unsigned int state)
{
struct appctx *ctx = context;
appctx_wakeup(ctx);
t->expire = TICK_ETERNITY;
return t;
}
static int hlua_applet_tcp_init(struct appctx *ctx, struct proxy *px, struct stream *strm)
{
struct stream_interface *si = ctx->owner;
struct hlua *hlua;
struct task *task;
char **arg;
const char *error;
hlua = pool_alloc(pool_head_hlua);
if (!hlua) {
SEND_ERR(px, "Lua applet tcp '%s': out of memory.\n",
ctx->rule->arg.hlua_rule->fcn->name);
return 0;
}
HLUA_INIT(hlua);
ctx->ctx.hlua_apptcp.hlua = hlua;
ctx->ctx.hlua_apptcp.flags = 0;
/* Create task used by signal to wakeup applets. */
task = task_new(tid_bit);
if (!task) {
SEND_ERR(px, "Lua applet tcp '%s': out of memory.\n",
ctx->rule->arg.hlua_rule->fcn->name);
return 0;
}
task->nice = 0;
task->context = ctx;
task->process = hlua_applet_wakeup;
ctx->ctx.hlua_apptcp.task = task;
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!hlua_ctx_init(hlua, fcn_ref_to_stack_id(ctx->rule->arg.hlua_rule->fcn), task, 0)) {
SEND_ERR(px, "Lua applet tcp '%s': can't initialize Lua context.\n",
ctx->rule->arg.hlua_rule->fcn->name);
return 0;
}
/* Set timeout according with the applet configuration. */
hlua->max_time = ctx->applet->timeout;
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(hlua)) {
if (lua_type(hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(hlua->T, -1);
else
error = "critical error";
SEND_ERR(px, "Lua applet tcp '%s': %s.\n",
ctx->rule->arg.hlua_rule->fcn->name, error);
return 0;
}
/* Check stack available size. */
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(px, "Lua applet tcp '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn->name);
RESET_SAFE_LJMP(hlua);
return 0;
}
/* Restore the function in the stack. */
lua_rawgeti(hlua->T, LUA_REGISTRYINDEX, ctx->rule->arg.hlua_rule->fcn->function_ref[hlua->state_id]);
/* Create and and push object stream in the stack. */
if (!hlua_applet_tcp_new(hlua->T, ctx)) {
SEND_ERR(px, "Lua applet tcp '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn->name);
RESET_SAFE_LJMP(hlua);
return 0;
}
hlua->nargs = 1;
/* push keywords in the stack. */
for (arg = ctx->rule->arg.hlua_rule->args; arg && *arg; arg++) {
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(px, "Lua applet tcp '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn->name);
RESET_SAFE_LJMP(hlua);
return 0;
}
lua_pushstring(hlua->T, *arg);
hlua->nargs++;
}
RESET_SAFE_LJMP(hlua);
/* Wakeup the applet ASAP. */
si_cant_get(si);
si_rx_endp_more(si);
return 1;
}
void hlua_applet_tcp_fct(struct appctx *ctx)
{
struct stream_interface *si = ctx->owner;
struct stream *strm = si_strm(si);
struct channel *res = si_ic(si);
struct act_rule *rule = ctx->rule;
struct proxy *px = strm->be;
struct hlua *hlua = ctx->ctx.hlua_apptcp.hlua;
/* The applet execution is already done. */
if (ctx->ctx.hlua_apptcp.flags & APPLET_DONE) {
/* eat the whole request */
co_skip(si_oc(si), co_data(si_oc(si)));
return;
}
/* If the stream is disconnect or closed, ldo nothing. */
if (unlikely(si->state == SI_ST_DIS || si->state == SI_ST_CLO))
return;
/* Execute the function. */
switch (hlua_ctx_resume(hlua, 1)) {
/* finished. */
case HLUA_E_OK:
ctx->ctx.hlua_apptcp.flags |= APPLET_DONE;
/* eat the whole request */
co_skip(si_oc(si), co_data(si_oc(si)));
res->flags |= CF_READ_NULL;
si_shutr(si);
return;
/* yield. */
case HLUA_E_AGAIN:
if (hlua->wake_time != TICK_ETERNITY)
task_schedule(ctx->ctx.hlua_apptcp.task, hlua->wake_time);
return;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(px, "Lua applet tcp '%s': %s.\n",
rule->arg.hlua_rule->fcn->name, lua_tostring(hlua->T, -1));
lua_pop(hlua->T, 1);
goto error;
case HLUA_E_ETMOUT:
SEND_ERR(px, "Lua applet tcp '%s': execution timeout.\n",
rule->arg.hlua_rule->fcn->name);
goto error;
case HLUA_E_NOMEM:
SEND_ERR(px, "Lua applet tcp '%s': out of memory error.\n",
rule->arg.hlua_rule->fcn->name);
goto error;
case HLUA_E_YIELD: /* unexpected */
SEND_ERR(px, "Lua applet tcp '%s': yield not allowed.\n",
rule->arg.hlua_rule->fcn->name);
goto error;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(px, "Lua applet tcp '%s' return an unknown error.\n",
rule->arg.hlua_rule->fcn->name);
goto error;
default:
goto error;
}
error:
/* For all other cases, just close the stream. */
si_shutw(si);
si_shutr(si);
ctx->ctx.hlua_apptcp.flags |= APPLET_DONE;
}
static void hlua_applet_tcp_release(struct appctx *ctx)
{
task_destroy(ctx->ctx.hlua_apptcp.task);
ctx->ctx.hlua_apptcp.task = NULL;
hlua_ctx_destroy(ctx->ctx.hlua_apptcp.hlua);
ctx->ctx.hlua_apptcp.hlua = NULL;
}
/* The function returns 1 if the initialisation is complete, 0 if
* an errors occurs and -1 if more data are required for initializing
* the applet.
*/
static int hlua_applet_http_init(struct appctx *ctx, struct proxy *px, struct stream *strm)
{
struct stream_interface *si = ctx->owner;
struct http_txn *txn;
struct hlua *hlua;
char **arg;
struct task *task;
const char *error;
txn = strm->txn;
hlua = pool_alloc(pool_head_hlua);
if (!hlua) {
SEND_ERR(px, "Lua applet http '%s': out of memory.\n",
ctx->rule->arg.hlua_rule->fcn->name);
return 0;
}
HLUA_INIT(hlua);
ctx->ctx.hlua_apphttp.hlua = hlua;
ctx->ctx.hlua_apphttp.left_bytes = -1;
ctx->ctx.hlua_apphttp.flags = 0;
if (txn->req.flags & HTTP_MSGF_VER_11)
ctx->ctx.hlua_apphttp.flags |= APPLET_HTTP11;
/* Create task used by signal to wakeup applets. */
task = task_new(tid_bit);
if (!task) {
SEND_ERR(px, "Lua applet http '%s': out of memory.\n",
ctx->rule->arg.hlua_rule->fcn->name);
return 0;
}
task->nice = 0;
task->context = ctx;
task->process = hlua_applet_wakeup;
ctx->ctx.hlua_apphttp.task = task;
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!hlua_ctx_init(hlua, fcn_ref_to_stack_id(ctx->rule->arg.hlua_rule->fcn), task, 0)) {
SEND_ERR(px, "Lua applet http '%s': can't initialize Lua context.\n",
ctx->rule->arg.hlua_rule->fcn->name);
return 0;
}
/* Set timeout according with the applet configuration. */
hlua->max_time = ctx->applet->timeout;
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(hlua)) {
if (lua_type(hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(hlua->T, -1);
else
error = "critical error";
SEND_ERR(px, "Lua applet http '%s': %s.\n",
ctx->rule->arg.hlua_rule->fcn->name, error);
return 0;
}
/* Check stack available size. */
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(px, "Lua applet http '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn->name);
RESET_SAFE_LJMP(hlua);
return 0;
}
/* Restore the function in the stack. */
lua_rawgeti(hlua->T, LUA_REGISTRYINDEX, ctx->rule->arg.hlua_rule->fcn->function_ref[hlua->state_id]);
/* Create and and push object stream in the stack. */
if (!hlua_applet_http_new(hlua->T, ctx)) {
SEND_ERR(px, "Lua applet http '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn->name);
RESET_SAFE_LJMP(hlua);
return 0;
}
hlua->nargs = 1;
/* push keywords in the stack. */
for (arg = ctx->rule->arg.hlua_rule->args; arg && *arg; arg++) {
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(px, "Lua applet http '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn->name);
RESET_SAFE_LJMP(hlua);
return 0;
}
lua_pushstring(hlua->T, *arg);
hlua->nargs++;
}
RESET_SAFE_LJMP(hlua);
/* Wakeup the applet when data is ready for read. */
si_cant_get(si);
return 1;
}
void hlua_applet_http_fct(struct appctx *ctx)
{
struct stream_interface *si = ctx->owner;
struct stream *strm = si_strm(si);
struct channel *req = si_oc(si);
struct channel *res = si_ic(si);
struct act_rule *rule = ctx->rule;
struct proxy *px = strm->be;
struct hlua *hlua = ctx->ctx.hlua_apphttp.hlua;
struct htx *req_htx, *res_htx;
res_htx = htx_from_buf(&res->buf);
/* If the stream is disconnect or closed, ldo nothing. */
if (unlikely(si->state == SI_ST_DIS || si->state == SI_ST_CLO))
goto out;
/* Check if the input buffer is available. */
if (!b_size(&res->buf)) {
si_rx_room_blk(si);
goto out;
}
/* check that the output is not closed */
if (res->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_SHUTR))
ctx->ctx.hlua_apphttp.flags |= APPLET_DONE;
/* Set the currently running flag. */
if (!HLUA_IS_RUNNING(hlua) &&
!(ctx->ctx.hlua_apphttp.flags & APPLET_DONE)) {
if (!co_data(req)) {
si_cant_get(si);
goto out;
}
}
/* Executes The applet if it is not done. */
if (!(ctx->ctx.hlua_apphttp.flags & APPLET_DONE)) {
/* Execute the function. */
switch (hlua_ctx_resume(hlua, 1)) {
/* finished. */
case HLUA_E_OK:
ctx->ctx.hlua_apphttp.flags |= APPLET_DONE;
break;
/* yield. */
case HLUA_E_AGAIN:
if (hlua->wake_time != TICK_ETERNITY)
task_schedule(ctx->ctx.hlua_apphttp.task, hlua->wake_time);
goto out;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(px, "Lua applet http '%s': %s.\n",
rule->arg.hlua_rule->fcn->name, lua_tostring(hlua->T, -1));
lua_pop(hlua->T, 1);
goto error;
case HLUA_E_ETMOUT:
SEND_ERR(px, "Lua applet http '%s': execution timeout.\n",
rule->arg.hlua_rule->fcn->name);
goto error;
case HLUA_E_NOMEM:
SEND_ERR(px, "Lua applet http '%s': out of memory error.\n",
rule->arg.hlua_rule->fcn->name);
goto error;
case HLUA_E_YIELD: /* unexpected */
SEND_ERR(px, "Lua applet http '%s': yield not allowed.\n",
rule->arg.hlua_rule->fcn->name);
goto error;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(px, "Lua applet http '%s' return an unknown error.\n",
rule->arg.hlua_rule->fcn->name);
goto error;
default:
goto error;
}
}
if (ctx->ctx.hlua_apphttp.flags & APPLET_DONE) {
if (ctx->ctx.hlua_apphttp.flags & APPLET_RSP_SENT)
goto done;
if (!(ctx->ctx.hlua_apphttp.flags & APPLET_HDR_SENT))
goto error;
/* no more data are expected. Don't add TLR because mux-h1 will take care of it */
res_htx->flags |= HTX_FL_EOM;
strm->txn->status = ctx->ctx.hlua_apphttp.status;
ctx->ctx.hlua_apphttp.flags |= APPLET_RSP_SENT;
}
done:
if (ctx->ctx.hlua_apphttp.flags & APPLET_DONE) {
if (!(res->flags & CF_SHUTR)) {
res->flags |= CF_READ_NULL;
si_shutr(si);
}
/* eat the whole request */
if (co_data(req)) {
req_htx = htx_from_buf(&req->buf);
co_htx_skip(req, req_htx, co_data(req));
htx_to_buf(req_htx, &req->buf);
}
}
out:
htx_to_buf(res_htx, &res->buf);
return;
error:
/* If we are in HTTP mode, and we are not send any
* data, return a 500 server error in best effort:
* if there is no room available in the buffer,
* just close the connection.
*/
if (!(ctx->ctx.hlua_apphttp.flags & APPLET_HDR_SENT)) {
struct buffer *err = &http_err_chunks[HTTP_ERR_500];
channel_erase(res);
res->buf.data = b_data(err);
memcpy(res->buf.area, b_head(err), b_data(err));
res_htx = htx_from_buf(&res->buf);
channel_add_input(res, res_htx->data);
}
if (!(strm->flags & SF_ERR_MASK))
strm->flags |= SF_ERR_RESOURCE;
ctx->ctx.hlua_apphttp.flags |= APPLET_DONE;
goto done;
}
static void hlua_applet_http_release(struct appctx *ctx)
{
task_destroy(ctx->ctx.hlua_apphttp.task);
ctx->ctx.hlua_apphttp.task = NULL;
hlua_ctx_destroy(ctx->ctx.hlua_apphttp.hlua);
ctx->ctx.hlua_apphttp.hlua = NULL;
}
/* global {tcp|http}-request parser. Return ACT_RET_PRS_OK in
* success case, else return ACT_RET_PRS_ERR.
*
* This function can fail with an abort() due to an Lua critical error.
* We are in the configuration parsing process of HAProxy, this abort() is
* tolerated.
*/
static enum act_parse_ret action_register_lua(const char **args, int *cur_arg, struct proxy *px,
struct act_rule *rule, char **err)
{
struct hlua_function *fcn = rule->kw->private;
int i;
/* Memory for the rule. */
rule->arg.hlua_rule = calloc(1, sizeof(*rule->arg.hlua_rule));
if (!rule->arg.hlua_rule) {
memprintf(err, "out of memory error");
goto error;
}
/* Memory for arguments. */
rule->arg.hlua_rule->args = calloc(fcn->nargs + 1,
sizeof(*rule->arg.hlua_rule->args));
if (!rule->arg.hlua_rule->args) {
memprintf(err, "out of memory error");
goto error;
}
/* Reference the Lua function and store the reference. */
rule->arg.hlua_rule->fcn = fcn;
/* Expect some arguments */
for (i = 0; i < fcn->nargs; i++) {
if (*args[*cur_arg] == '\0') {
memprintf(err, "expect %d arguments", fcn->nargs);
goto error;
}
rule->arg.hlua_rule->args[i] = strdup(args[*cur_arg]);
if (!rule->arg.hlua_rule->args[i]) {
memprintf(err, "out of memory error");
goto error;
}
(*cur_arg)++;
}
rule->arg.hlua_rule->args[i] = NULL;
rule->action = ACT_CUSTOM;
rule->action_ptr = hlua_action;
return ACT_RET_PRS_OK;
error:
if (rule->arg.hlua_rule) {
if (rule->arg.hlua_rule->args) {
for (i = 0; i < fcn->nargs; i++)
ha_free(&rule->arg.hlua_rule->args[i]);
ha_free(&rule->arg.hlua_rule->args);
}
ha_free(&rule->arg.hlua_rule);
}
return ACT_RET_PRS_ERR;
}
static enum act_parse_ret action_register_service_http(const char **args, int *cur_arg, struct proxy *px,
struct act_rule *rule, char **err)
{
struct hlua_function *fcn = rule->kw->private;
/* HTTP applets are forbidden in tcp-request rules.
* HTTP applet request requires everything initialized by
* "http_process_request" (analyzer flag AN_REQ_HTTP_INNER).
* The applet will be immediately initialized, but its before
* the call of this analyzer.
*/
if (rule->from != ACT_F_HTTP_REQ) {
memprintf(err, "HTTP applets are forbidden from 'tcp-request' rulesets");
return ACT_RET_PRS_ERR;
}
/* Memory for the rule. */
rule->arg.hlua_rule = calloc(1, sizeof(*rule->arg.hlua_rule));
if (!rule->arg.hlua_rule) {
memprintf(err, "out of memory error");
return ACT_RET_PRS_ERR;
}
/* Reference the Lua function and store the reference. */
rule->arg.hlua_rule->fcn = fcn;
/* TODO: later accept arguments. */
rule->arg.hlua_rule->args = NULL;
/* Add applet pointer in the rule. */
rule->applet.obj_type = OBJ_TYPE_APPLET;
rule->applet.name = fcn->name;
rule->applet.init = hlua_applet_http_init;
rule->applet.fct = hlua_applet_http_fct;
rule->applet.release = hlua_applet_http_release;
rule->applet.timeout = hlua_timeout_applet;
return ACT_RET_PRS_OK;
}
/* This function is an LUA binding used for registering
* "sample-conv" functions. It expects a converter name used
* in the haproxy configuration file, and an LUA function.
*/
__LJMP static int hlua_register_action(lua_State *L)
{
struct action_kw_list *akl = NULL;
const char *name;
int ref;
int len;
struct hlua_function *fcn = NULL;
int nargs;
struct buffer *trash;
struct action_kw *akw;
/* Initialise the number of expected arguments at 0. */
nargs = 0;
if (lua_gettop(L) < 3 || lua_gettop(L) > 4)
WILL_LJMP(luaL_error(L, "'register_action' needs between 3 and 4 arguments"));
/* First argument : converter name. */
name = MAY_LJMP(luaL_checkstring(L, 1));
/* Second argument : environment. */
if (lua_type(L, 2) != LUA_TTABLE)
WILL_LJMP(luaL_error(L, "register_action: second argument must be a table of strings"));
/* Third argument : lua function. */
ref = MAY_LJMP(hlua_checkfunction(L, 3));
/* Fourth argument : number of mandatory arguments expected on the configuration line. */
if (lua_gettop(L) >= 4)
nargs = MAY_LJMP(luaL_checkinteger(L, 4));
/* browse the second argument as an array. */
lua_pushnil(L);
while (lua_next(L, 2) != 0) {
if (lua_type(L, -1) != LUA_TSTRING)
WILL_LJMP(luaL_error(L, "register_action: second argument must be a table of strings"));
/* Check if action exists */
trash = get_trash_chunk();
chunk_printf(trash, "lua.%s", name);
if (strcmp(lua_tostring(L, -1), "tcp-req") == 0) {
akw = tcp_req_cont_action(trash->area);
} else if (strcmp(lua_tostring(L, -1), "tcp-res") == 0) {
akw = tcp_res_cont_action(trash->area);
} else if (strcmp(lua_tostring(L, -1), "http-req") == 0) {
akw = action_http_req_custom(trash->area);
} else if (strcmp(lua_tostring(L, -1), "http-res") == 0) {
akw = action_http_res_custom(trash->area);
} else {
akw = NULL;
}
if (akw != NULL) {
fcn = akw->private;
if (fcn->function_ref[hlua_state_id] != -1) {
ha_warning("Trying to register action 'lua.%s' more than once. "
"This will become a hard error in version 2.5.\n", name);
}
fcn->function_ref[hlua_state_id] = ref;
/* pop the environment string. */
lua_pop(L, 1);
continue;
}
/* Check required environment. Only accepted "http" or "tcp". */
/* Allocate and fill the sample fetch keyword struct. */
akl = calloc(1, sizeof(*akl) + sizeof(struct action_kw) * 2);
if (!akl)
goto alloc_error;;
fcn = new_hlua_function();
if (!fcn)
goto alloc_error;
/* Fill fcn. */
fcn->name = strdup(name);
if (!fcn->name)
goto alloc_error;
fcn->function_ref[hlua_state_id] = ref;
/* Set the expected number of arguments. */
fcn->nargs = nargs;
/* List head */
akl->list.n = akl->list.p = NULL;
/* action keyword. */
len = strlen("lua.") + strlen(name) + 1;
akl->kw[0].kw = calloc(1, len);
if (!akl->kw[0].kw)
goto alloc_error;
snprintf((char *)akl->kw[0].kw, len, "lua.%s", name);
akl->kw[0].flags = 0;
akl->kw[0].private = fcn;
akl->kw[0].parse = action_register_lua;
/* select the action registering point. */
if (strcmp(lua_tostring(L, -1), "tcp-req") == 0)
tcp_req_cont_keywords_register(akl);
else if (strcmp(lua_tostring(L, -1), "tcp-res") == 0)
tcp_res_cont_keywords_register(akl);
else if (strcmp(lua_tostring(L, -1), "http-req") == 0)
http_req_keywords_register(akl);
else if (strcmp(lua_tostring(L, -1), "http-res") == 0)
http_res_keywords_register(akl);
else {
release_hlua_function(fcn);
if (akl)
ha_free((char **)&(akl->kw[0].kw));
ha_free(&akl);
WILL_LJMP(luaL_error(L, "Lua action environment '%s' is unknown. "
"'tcp-req', 'tcp-res', 'http-req' or 'http-res' "
"are expected.", lua_tostring(L, -1)));
}
/* pop the environment string. */
lua_pop(L, 1);
/* reset for next loop */
akl = NULL;
fcn = NULL;
}
return ACT_RET_PRS_OK;
alloc_error:
release_hlua_function(fcn);
ha_free(&akl);
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
return 0; /* Never reached */
}
static enum act_parse_ret action_register_service_tcp(const char **args, int *cur_arg, struct proxy *px,
struct act_rule *rule, char **err)
{
struct hlua_function *fcn = rule->kw->private;
if (px->mode == PR_MODE_HTTP) {
memprintf(err, "Lua TCP services cannot be used on HTTP proxies");
return ACT_RET_PRS_ERR;
}
/* Memory for the rule. */
rule->arg.hlua_rule = calloc(1, sizeof(*rule->arg.hlua_rule));
if (!rule->arg.hlua_rule) {
memprintf(err, "out of memory error");
return ACT_RET_PRS_ERR;
}
/* Reference the Lua function and store the reference. */
rule->arg.hlua_rule->fcn = fcn;
/* TODO: later accept arguments. */
rule->arg.hlua_rule->args = NULL;
/* Add applet pointer in the rule. */
rule->applet.obj_type = OBJ_TYPE_APPLET;
rule->applet.name = fcn->name;
rule->applet.init = hlua_applet_tcp_init;
rule->applet.fct = hlua_applet_tcp_fct;
rule->applet.release = hlua_applet_tcp_release;
rule->applet.timeout = hlua_timeout_applet;
return 0;
}
/* This function is an LUA binding used for registering
* "sample-conv" functions. It expects a converter name used
* in the haproxy configuration file, and an LUA function.
*/
__LJMP static int hlua_register_service(lua_State *L)
{
struct action_kw_list *akl;
const char *name;
const char *env;
int ref;
int len;
struct hlua_function *fcn = NULL;
struct buffer *trash;
struct action_kw *akw;
MAY_LJMP(check_args(L, 3, "register_service"));
/* First argument : converter name. */
name = MAY_LJMP(luaL_checkstring(L, 1));
/* Second argument : environment. */
env = MAY_LJMP(luaL_checkstring(L, 2));
/* Third argument : lua function. */
ref = MAY_LJMP(hlua_checkfunction(L, 3));
/* Check for service already registered */
trash = get_trash_chunk();
chunk_printf(trash, "lua.%s", name);
akw = service_find(trash->area);
if (akw != NULL) {
fcn = akw->private;
if (fcn->function_ref[hlua_state_id] != -1) {
ha_warning("Trying to register service 'lua.%s' more than once. "
"This will become a hard error in version 2.5.\n", name);
}
fcn->function_ref[hlua_state_id] = ref;
return 0;
}
/* Allocate and fill the sample fetch keyword struct. */
akl = calloc(1, sizeof(*akl) + sizeof(struct action_kw) * 2);
if (!akl)
goto alloc_error;
fcn = new_hlua_function();
if (!fcn)
goto alloc_error;
/* Fill fcn. */
len = strlen("<lua.>") + strlen(name) + 1;
fcn->name = calloc(1, len);
if (!fcn->name)
goto alloc_error;
snprintf((char *)fcn->name, len, "<lua.%s>", name);
fcn->function_ref[hlua_state_id] = ref;
/* List head */
akl->list.n = akl->list.p = NULL;
/* converter keyword. */
len = strlen("lua.") + strlen(name) + 1;
akl->kw[0].kw = calloc(1, len);
if (!akl->kw[0].kw)
goto alloc_error;
snprintf((char *)akl->kw[0].kw, len, "lua.%s", name);
/* Check required environment. Only accepted "http" or "tcp". */
if (strcmp(env, "tcp") == 0)
akl->kw[0].parse = action_register_service_tcp;
else if (strcmp(env, "http") == 0)
akl->kw[0].parse = action_register_service_http;
else {
release_hlua_function(fcn);
if (akl)
ha_free((char **)&(akl->kw[0].kw));
ha_free(&akl);
WILL_LJMP(luaL_error(L, "Lua service environment '%s' is unknown. "
"'tcp' or 'http' are expected.", env));
}
akl->kw[0].flags = 0;
akl->kw[0].private = fcn;
/* End of array. */
memset(&akl->kw[1], 0, sizeof(*akl->kw));
/* Register this new converter */
service_keywords_register(akl);
return 0;
alloc_error:
release_hlua_function(fcn);
ha_free(&akl);
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
return 0; /* Never reached */
}
/* This function initialises Lua cli handler. It copies the
* arguments in the Lua stack and create channel IO objects.
*/
static int hlua_cli_parse_fct(char **args, char *payload, struct appctx *appctx, void *private)
{
struct hlua *hlua;
struct hlua_function *fcn;
int i;
const char *error;
fcn = private;
appctx->ctx.hlua_cli.fcn = private;
hlua = pool_alloc(pool_head_hlua);
if (!hlua) {
SEND_ERR(NULL, "Lua cli '%s': out of memory.\n", fcn->name);
return 1;
}
HLUA_INIT(hlua);
appctx->ctx.hlua_cli.hlua = hlua;
/* Create task used by signal to wakeup applets.
* We use the same wakeup function than the Lua applet_tcp and
* applet_http. It is absolutely compatible.
*/
appctx->ctx.hlua_cli.task = task_new(tid_bit);
if (!appctx->ctx.hlua_cli.task) {
SEND_ERR(NULL, "Lua cli '%s': out of memory.\n", fcn->name);
goto error;
}
appctx->ctx.hlua_cli.task->nice = 0;
appctx->ctx.hlua_cli.task->context = appctx;
appctx->ctx.hlua_cli.task->process = hlua_applet_wakeup;
/* Initialises the Lua context */
if (!hlua_ctx_init(hlua, fcn_ref_to_stack_id(fcn), appctx->ctx.hlua_cli.task, 0)) {
SEND_ERR(NULL, "Lua cli '%s': can't initialize Lua context.\n", fcn->name);
goto error;
}
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(hlua)) {
if (lua_type(hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(hlua->T, -1);
else
error = "critical error";
SEND_ERR(NULL, "Lua cli '%s': %s.\n", fcn->name, error);
goto error;
}
/* Check stack available size. */
if (!lua_checkstack(hlua->T, 2)) {
SEND_ERR(NULL, "Lua cli '%s': full stack.\n", fcn->name);
goto error;
}
/* Restore the function in the stack. */
lua_rawgeti(hlua->T, LUA_REGISTRYINDEX, fcn->function_ref[hlua->state_id]);
/* Once the arguments parsed, the CLI is like an AppletTCP,
* so push AppletTCP in the stack.
*/
if (!hlua_applet_tcp_new(hlua->T, appctx)) {
SEND_ERR(NULL, "Lua cli '%s': full stack.\n", fcn->name);
goto error;
}
hlua->nargs = 1;
/* push keywords in the stack. */
for (i = 0; *args[i]; i++) {
/* Check stack available size. */
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(NULL, "Lua cli '%s': full stack.\n", fcn->name);
goto error;
}
lua_pushstring(hlua->T, args[i]);
hlua->nargs++;
}
/* We must initialize the execution timeouts. */
hlua->max_time = hlua_timeout_session;
/* At this point the execution is safe. */
RESET_SAFE_LJMP(hlua);
/* It's ok */
return 0;
/* It's not ok. */
error:
RESET_SAFE_LJMP(hlua);
hlua_ctx_destroy(hlua);
appctx->ctx.hlua_cli.hlua = NULL;
return 1;
}
static int hlua_cli_io_handler_fct(struct appctx *appctx)
{
struct hlua *hlua;
struct stream_interface *si;
struct hlua_function *fcn;
hlua = appctx->ctx.hlua_cli.hlua;
si = appctx->owner;
fcn = appctx->ctx.hlua_cli.fcn;
/* If the stream is disconnect or closed, ldo nothing. */
if (unlikely(si->state == SI_ST_DIS || si->state == SI_ST_CLO))
return 1;
/* Execute the function. */
switch (hlua_ctx_resume(hlua, 1)) {
/* finished. */
case HLUA_E_OK:
return 1;
/* yield. */
case HLUA_E_AGAIN:
/* We want write. */
if (HLUA_IS_WAKERESWR(hlua))
si_rx_room_blk(si);
/* Set the timeout. */
if (hlua->wake_time != TICK_ETERNITY)
task_schedule(hlua->task, hlua->wake_time);
return 0;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(NULL, "Lua cli '%s': %s.\n",
fcn->name, lua_tostring(hlua->T, -1));
lua_pop(hlua->T, 1);
return 1;
case HLUA_E_ETMOUT:
SEND_ERR(NULL, "Lua converter '%s': execution timeout.\n",
fcn->name);
return 1;
case HLUA_E_NOMEM:
SEND_ERR(NULL, "Lua converter '%s': out of memory error.\n",
fcn->name);
return 1;
case HLUA_E_YIELD: /* unexpected */
SEND_ERR(NULL, "Lua converter '%s': yield not allowed.\n",
fcn->name);
return 1;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(NULL, "Lua cli '%s' return an unknown error.\n",
fcn->name);
return 1;
default:
return 1;
}
return 1;
}
static void hlua_cli_io_release_fct(struct appctx *appctx)
{
hlua_ctx_destroy(appctx->ctx.hlua_cli.hlua);
appctx->ctx.hlua_cli.hlua = NULL;
}
/* This function is an LUA binding used for registering
* new keywords in the cli. It expects a list of keywords
* which are the "path". It is limited to 5 keywords. A
* description of the command, a function to be executed
* for the parsing and a function for io handlers.
*/
__LJMP static int hlua_register_cli(lua_State *L)
{
struct cli_kw_list *cli_kws;
const char *message;
int ref_io;
int len;
struct hlua_function *fcn = NULL;
int index;
int i;
struct buffer *trash;
const char *kw[5];
struct cli_kw *cli_kw;
const char *errmsg;
MAY_LJMP(check_args(L, 3, "register_cli"));
/* First argument : an array of maximum 5 keywords. */
if (!lua_istable(L, 1))
WILL_LJMP(luaL_argerror(L, 1, "1st argument must be a table"));
/* Second argument : string with contextual message. */
message = MAY_LJMP(luaL_checkstring(L, 2));
/* Third and fourth argument : lua function. */
ref_io = MAY_LJMP(hlua_checkfunction(L, 3));
/* Check for CLI service already registered */
trash = get_trash_chunk();
index = 0;
lua_pushnil(L);
memset(kw, 0, sizeof(kw));
while (lua_next(L, 1) != 0) {
if (index >= CLI_PREFIX_KW_NB)
WILL_LJMP(luaL_argerror(L, 1, "1st argument must be a table with a maximum of 5 entries"));
if (lua_type(L, -1) != LUA_TSTRING)
WILL_LJMP(luaL_argerror(L, 1, "1st argument must be a table filled with strings"));
kw[index] = lua_tostring(L, -1);
if (index == 0)
chunk_printf(trash, "%s", kw[index]);
else
chunk_appendf(trash, " %s", kw[index]);
index++;
lua_pop(L, 1);
}
cli_kw = cli_find_kw_exact((char **)kw);
if (cli_kw != NULL) {
fcn = cli_kw->private;
if (fcn->function_ref[hlua_state_id] != -1) {
ha_warning("Trying to register CLI keyword 'lua.%s' more than once. "
"This will become a hard error in version 2.5.\n", trash->area);
}
fcn->function_ref[hlua_state_id] = ref_io;
return 0;
}
/* Allocate and fill the sample fetch keyword struct. */
cli_kws = calloc(1, sizeof(*cli_kws) + sizeof(struct cli_kw) * 2);
if (!cli_kws) {
errmsg = "Lua out of memory error.";
goto error;
}
fcn = new_hlua_function();
if (!fcn) {
errmsg = "Lua out of memory error.";
goto error;
}
/* Fill path. */
index = 0;
lua_pushnil(L);
while(lua_next(L, 1) != 0) {
if (index >= 5) {
errmsg = "1st argument must be a table with a maximum of 5 entries";
goto error;
}
if (lua_type(L, -1) != LUA_TSTRING) {
errmsg = "1st argument must be a table filled with strings";
goto error;
}
cli_kws->kw[0].str_kw[index] = strdup(lua_tostring(L, -1));
if (!cli_kws->kw[0].str_kw[index]) {
errmsg = "Lua out of memory error.";
goto error;
}
index++;
lua_pop(L, 1);
}
/* Copy help message. */
cli_kws->kw[0].usage = strdup(message);
if (!cli_kws->kw[0].usage) {
errmsg = "Lua out of memory error.";
goto error;
}
/* Fill fcn io handler. */
len = strlen("<lua.cli>") + 1;
for (i = 0; i < index; i++)
len += strlen(cli_kws->kw[0].str_kw[i]) + 1;
fcn->name = calloc(1, len);
if (!fcn->name) {
errmsg = "Lua out of memory error.";
goto error;
}
strncat((char *)fcn->name, "<lua.cli", len);
for (i = 0; i < index; i++) {
strncat((char *)fcn->name, ".", len);
strncat((char *)fcn->name, cli_kws->kw[0].str_kw[i], len);
}
strncat((char *)fcn->name, ">", len);
fcn->function_ref[hlua_state_id] = ref_io;
/* Fill last entries. */
cli_kws->kw[0].private = fcn;
cli_kws->kw[0].parse = hlua_cli_parse_fct;
cli_kws->kw[0].io_handler = hlua_cli_io_handler_fct;
cli_kws->kw[0].io_release = hlua_cli_io_release_fct;
/* Register this new converter */
cli_register_kw(cli_kws);
return 0;
error:
release_hlua_function(fcn);
if (cli_kws) {
for (i = 0; i < index; i++)
ha_free((char **)&(cli_kws->kw[0].str_kw[i]));
ha_free((char **)&(cli_kws->kw[0].usage));
}
ha_free(&cli_kws);
WILL_LJMP(luaL_error(L, errmsg));
return 0; /* Never reached */
}
static int hlua_read_timeout(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err, unsigned int *timeout)
{
const char *error;
error = parse_time_err(args[1], timeout, TIME_UNIT_MS);
if (error == PARSE_TIME_OVER) {
memprintf(err, "timer overflow in argument <%s> to <%s> (maximum value is 2147483647 ms or ~24.8 days)",
args[1], args[0]);
return -1;
}
else if (error == PARSE_TIME_UNDER) {
memprintf(err, "timer underflow in argument <%s> to <%s> (minimum non-null value is 1 ms)",
args[1], args[0]);
return -1;
}
else if (error) {
memprintf(err, "%s: invalid timeout", args[0]);
return -1;
}
return 0;
}
static int hlua_session_timeout(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
return hlua_read_timeout(args, section_type, curpx, defpx,
file, line, err, &hlua_timeout_session);
}
static int hlua_task_timeout(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
return hlua_read_timeout(args, section_type, curpx, defpx,
file, line, err, &hlua_timeout_task);
}
static int hlua_applet_timeout(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
return hlua_read_timeout(args, section_type, curpx, defpx,
file, line, err, &hlua_timeout_applet);
}
static int hlua_forced_yield(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
char *error;
hlua_nb_instruction = strtoll(args[1], &error, 10);
if (*error != '\0') {
memprintf(err, "%s: invalid number", args[0]);
return -1;
}
return 0;
}
static int hlua_parse_maxmem(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
char *error;
if (*(args[1]) == 0) {
memprintf(err, "'%s' expects an integer argument (Lua memory size in MB).\n", args[0]);
return -1;
}
hlua_global_allocator.limit = strtoll(args[1], &error, 10) * 1024L * 1024L;
if (*error != '\0') {
memprintf(err, "%s: invalid number %s (error at '%c')", args[0], args[1], *error);
return -1;
}
return 0;
}
/* This function is called by the main configuration key "lua-load". It loads and
* execute an lua file during the parsing of the HAProxy configuration file. It is
* the main lua entry point.
*
* This function runs with the HAProxy keywords API. It returns -1 if an error
* occurs, otherwise it returns 0.
*
* In some error case, LUA set an error message in top of the stack. This function
* returns this error message in the HAProxy logs and pop it from the stack.
*
* This function can fail with an abort() due to an Lua critical error.
* We are in the configuration parsing process of HAProxy, this abort() is
* tolerated.
*/
static int hlua_load_state(char *filename, lua_State *L, char **err)
{
int error;
/* Just load and compile the file. */
error = luaL_loadfile(L, filename);
if (error) {
memprintf(err, "error in Lua file '%s': %s", filename, lua_tostring(L, -1));
lua_pop(L, 1);
return -1;
}
/* If no syntax error where detected, execute the code. */
error = lua_pcall(L, 0, LUA_MULTRET, 0);
switch (error) {
case LUA_OK:
break;
case LUA_ERRRUN:
memprintf(err, "Lua runtime error: %s\n", lua_tostring(L, -1));
lua_pop(L, 1);
return -1;
case LUA_ERRMEM:
memprintf(err, "Lua out of memory error\n");
return -1;
case LUA_ERRERR:
memprintf(err, "Lua message handler error: %s\n", lua_tostring(L, -1));
lua_pop(L, 1);
return -1;
#if defined(LUA_VERSION_NUM) && LUA_VERSION_NUM <= 503
case LUA_ERRGCMM:
memprintf(err, "Lua garbage collector error: %s\n", lua_tostring(L, -1));
lua_pop(L, 1);
return -1;
#endif
default:
memprintf(err, "Lua unknown error: %s\n", lua_tostring(L, -1));
lua_pop(L, 1);
return -1;
}
return 0;
}
static int hlua_load(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
if (*(args[1]) == 0) {
memprintf(err, "'%s' expects a file name as parameter.\n", args[0]);
return -1;
}
/* loading for global state */
hlua_state_id = 0;
ha_set_tid(0);
return hlua_load_state(args[1], hlua_states[0], err);
}
static int hlua_load_per_thread(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
int len;
if (*(args[1]) == 0) {
memprintf(err, "'%s' expects a file as parameter.\n", args[0]);
return -1;
}
if (per_thread_load == NULL) {
/* allocate the first entry large enough to store the final NULL */
per_thread_load = calloc(1, sizeof(*per_thread_load));
if (per_thread_load == NULL) {
memprintf(err, "out of memory error");
return -1;
}
}
/* count used entries */
for (len = 0; per_thread_load[len] != NULL; len++)
;
per_thread_load = realloc(per_thread_load, (len + 2) * sizeof(*per_thread_load));
if (per_thread_load == NULL) {
memprintf(err, "out of memory error");
return -1;
}
per_thread_load[len] = strdup(args[1]);
per_thread_load[len + 1] = NULL;
if (per_thread_load[len] == NULL) {
memprintf(err, "out of memory error");
return -1;
}
/* loading for thread 1 only */
hlua_state_id = 1;
ha_set_tid(0);
return hlua_load_state(args[1], hlua_states[1], err);
}
/* Prepend the given <path> followed by a semicolon to the `package.<type>` variable
* in the given <ctx>.
*/
static int hlua_prepend_path(lua_State *L, char *type, char *path)
{
lua_getglobal(L, "package"); /* push package variable */
lua_pushstring(L, path); /* push given path */
lua_pushstring(L, ";"); /* push semicolon */
lua_getfield(L, -3, type); /* push old path */
lua_concat(L, 3); /* concatenate to new path */
lua_setfield(L, -2, type); /* store new path */
lua_pop(L, 1); /* pop package variable */
return 0;
}
static int hlua_config_prepend_path(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
char *path;
char *type = "path";
struct prepend_path *p = NULL;
if (too_many_args(2, args, err, NULL)) {
goto err;
}
if (!(*args[1])) {
memprintf(err, "'%s' expects to receive a <path> as argument", args[0]);
goto err;
}
path = args[1];
if (*args[2]) {
if (strcmp(args[2], "path") != 0 && strcmp(args[2], "cpath") != 0) {
memprintf(err, "'%s' expects <type> to either be 'path' or 'cpath'", args[0]);
goto err;
}
type = args[2];
}
p = calloc(1, sizeof(*p));
if (p == NULL) {
memprintf(err, "memory allocation failed");
goto err;
}
p->path = strdup(path);
if (p->path == NULL) {
memprintf(err, "memory allocation failed");
goto err2;
}
p->type = strdup(type);
if (p->type == NULL) {
memprintf(err, "memory allocation failed");
goto err2;
}
LIST_APPEND(&prepend_path_list, &p->l);
hlua_prepend_path(hlua_states[0], type, path);
hlua_prepend_path(hlua_states[1], type, path);
return 0;
err2:
free(p->type);
free(p->path);
err:
free(p);
return -1;
}
/* configuration keywords declaration */
static struct cfg_kw_list cfg_kws = {{ },{
{ CFG_GLOBAL, "lua-prepend-path", hlua_config_prepend_path },
{ CFG_GLOBAL, "lua-load", hlua_load },
{ CFG_GLOBAL, "lua-load-per-thread", hlua_load_per_thread },
{ CFG_GLOBAL, "tune.lua.session-timeout", hlua_session_timeout },
{ CFG_GLOBAL, "tune.lua.task-timeout", hlua_task_timeout },
{ CFG_GLOBAL, "tune.lua.service-timeout", hlua_applet_timeout },
{ CFG_GLOBAL, "tune.lua.forced-yield", hlua_forced_yield },
{ CFG_GLOBAL, "tune.lua.maxmem", hlua_parse_maxmem },
{ 0, NULL, NULL },
}};
INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
/* This function can fail with an abort() due to an Lua critical error.
* We are in the initialisation process of HAProxy, this abort() is
* tolerated.
*/
int hlua_post_init_state(lua_State *L)
{
struct hlua_init_function *init;
const char *msg;
enum hlua_exec ret;
const char *error;
const char *kind;
const char *trace;
int return_status = 1;
#if defined(LUA_VERSION_NUM) && LUA_VERSION_NUM >= 504
int nres;
#endif
/* disable memory limit checks if limit is not set */
if (!hlua_global_allocator.limit)
hlua_global_allocator.limit = ~hlua_global_allocator.limit;
/* Call post initialisation function in safe environment. */
if (setjmp(safe_ljmp_env) != 0) {
lua_atpanic(L, hlua_panic_safe);
if (lua_type(L, -1) == LUA_TSTRING)
error = lua_tostring(L, -1);
else
error = "critical error";
fprintf(stderr, "Lua post-init: %s.\n", error);
exit(1);
} else {
lua_atpanic(L, hlua_panic_ljmp);
}
hlua_fcn_post_init(L);
list_for_each_entry(init, &hlua_init_functions[hlua_state_id], l) {
lua_rawgeti(L, LUA_REGISTRYINDEX, init->function_ref);
#if defined(LUA_VERSION_NUM) && LUA_VERSION_NUM >= 504
ret = lua_resume(L, L, 0, &nres);
#else
ret = lua_resume(L, L, 0);
#endif
kind = NULL;
switch (ret) {
case LUA_OK:
lua_pop(L, -1);
break;
case LUA_ERRERR:
kind = "message handler error";
/* Fall through */
case LUA_ERRRUN:
if (!kind)
kind = "runtime error";
msg = lua_tostring(L, -1);
lua_settop(L, 0); /* Empty the stack. */
lua_pop(L, 1);
trace = hlua_traceback(L, ", ");
if (msg)
ha_alert("Lua init: %s: '%s' from %s\n", kind, msg, trace);
else
ha_alert("Lua init: unknown %s from %s\n", kind, trace);
return_status = 0;
break;
default:
/* Unknown error */
kind = "Unknown error";
/* Fall through */
case LUA_YIELD:
/* yield is not configured at this step, this state doesn't happen */
if (!kind)
kind = "yield not allowed";
/* Fall through */
case LUA_ERRMEM:
if (!kind)
kind = "out of memory error";
lua_settop(L, 0);
lua_pop(L, 1);
trace = hlua_traceback(L, ", ");
ha_alert("Lua init: %s: %s\n", kind, trace);
return_status = 0;
break;
}
if (!return_status)
break;
}
lua_atpanic(L, hlua_panic_safe);
return return_status;
}
int hlua_post_init()
{
int ret;
int i;
int errors;
char *err = NULL;
struct hlua_function *fcn;
#if USE_OPENSSL
/* Initialize SSL server. */
if (socket_ssl->xprt->prepare_srv) {
int saved_used_backed = global.ssl_used_backend;
// don't affect maxconn automatic computation
socket_ssl->xprt->prepare_srv(socket_ssl);
global.ssl_used_backend = saved_used_backed;
}
#endif
/* Perform post init of common thread */
hlua_state_id = 0;
ha_set_tid(0);
ret = hlua_post_init_state(hlua_states[hlua_state_id]);
if (ret == 0)
return 0;
/* init remaining lua states and load files */
for (hlua_state_id = 2; hlua_state_id < global.nbthread + 1; hlua_state_id++) {
/* set thread context */
ha_set_tid(hlua_state_id - 1);
/* Init lua state */
hlua_states[hlua_state_id] = hlua_init_state(hlua_state_id);
/* Load lua files */
for (i = 0; per_thread_load && per_thread_load[i]; i++) {
ret = hlua_load_state(per_thread_load[i], hlua_states[hlua_state_id], &err);
if (ret != 0) {
ha_alert("Lua init: %s\n", err);
return 0;
}
}
}
/* Reset thread context */
ha_set_tid(0);
/* Execute post init for all states */
for (hlua_state_id = 1; hlua_state_id < global.nbthread + 1; hlua_state_id++) {
/* set thread context */
ha_set_tid(hlua_state_id - 1);
/* run post init */
ret = hlua_post_init_state(hlua_states[hlua_state_id]);
if (ret == 0)
return 0;
}
/* Reset thread context */
ha_set_tid(0);
/* control functions registering. Each function must have:
* - only the function_ref[0] set positive and all other to -1
* - only the function_ref[0] set to -1 and all other positive
* This ensure a same reference is not used both in shared
* lua state and thread dedicated lua state. Note: is the case
* reach, the shared state is priority, but the bug will be
* complicated to found for the end user.
*/
errors = 0;
list_for_each_entry(fcn, &referenced_functions, l) {
ret = 0;
for (i = 1; i < global.nbthread + 1; i++) {
if (fcn->function_ref[i] == -1)
ret--;
else
ret++;
}
if (abs(ret) != global.nbthread) {
ha_alert("Lua function '%s' is not referenced in all thread. "
"Expect function in all thread or in none thread.\n", fcn->name);
errors++;
continue;
}
if ((fcn->function_ref[0] == -1) == (ret < 0)) {
ha_alert("Lua function '%s' is referenced both ins shared Lua context (through lua-load) "
"and per-thread Lua context (through lua-load-per-thread). these two context "
"exclusive.\n", fcn->name);
errors++;
}
}
if (errors > 0)
return 0;
/* after this point, this global will no longer be used, so set to
* -1 in order to have probably a segfault if someone use it
*/
hlua_state_id = -1;
return 1;
}
/* The memory allocator used by the Lua stack. <ud> is a pointer to the
* allocator's context. <ptr> is the pointer to alloc/free/realloc. <osize>
* is the previously allocated size or the kind of object in case of a new
* allocation. <nsize> is the requested new size. A new allocation is
* indicated by <ptr> being NULL. A free is indicated by <nsize> being
* zero. This one verifies that the limits are respected but is optimized
* for the fast case where limits are not used, hence stats are not updated.
*/
static void *hlua_alloc(void *ud, void *ptr, size_t osize, size_t nsize)
{
struct hlua_mem_allocator *zone = ud;
size_t limit, old, new;
if (unlikely(!ptr && !nsize))
return NULL;
/* a limit of ~0 means unlimited and boot complete, so there's no need
* for accounting anymore.
*/
if (likely(~zone->limit == 0))
return realloc(ptr, nsize);
if (!ptr)
osize = 0;
/* enforce strict limits across all threads */
limit = zone->limit;
old = _HA_ATOMIC_LOAD(&zone->allocated);
do {
new = old + nsize - osize;
if (unlikely(nsize && limit && new > limit))
return NULL;
} while (!_HA_ATOMIC_CAS(&zone->allocated, &old, new));
ptr = realloc(ptr, nsize);
if (unlikely(!ptr && nsize)) // failed
_HA_ATOMIC_SUB(&zone->allocated, nsize - osize);
__ha_barrier_atomic_store();
return ptr;
}
/* This function can fail with an abort() due to a Lua critical error.
* We are in the initialisation process of HAProxy, this abort() is
* tolerated.
*/
lua_State *hlua_init_state(int thread_num)
{
int i;
int idx;
struct sample_fetch *sf;
struct sample_conv *sc;
char *p;
const char *error_msg;
void **context;
lua_State *L;
struct prepend_path *pp;
/* Init main lua stack. */
L = lua_newstate(hlua_alloc, &hlua_global_allocator);
/* Initialise Lua context to NULL */
context = lua_getextraspace(L);
*context = NULL;
/* From this point, until the end of the initialisation function,
* the Lua function can fail with an abort. We are in the initialisation
* process of HAProxy, this abort() is tolerated.
*/
/* Call post initialisation function in safe environment. */
if (setjmp(safe_ljmp_env) != 0) {
lua_atpanic(L, hlua_panic_safe);
if (lua_type(L, -1) == LUA_TSTRING)
error_msg = lua_tostring(L, -1);
else
error_msg = "critical error";
fprintf(stderr, "Lua init: %s.\n", error_msg);
exit(1);
} else {
lua_atpanic(L, hlua_panic_ljmp);
}
/* Initialise lua. */
luaL_openlibs(L);
#define HLUA_PREPEND_PATH_TOSTRING1(x) #x
#define HLUA_PREPEND_PATH_TOSTRING(x) HLUA_PREPEND_PATH_TOSTRING1(x)
#ifdef HLUA_PREPEND_PATH
hlua_prepend_path(L, "path", HLUA_PREPEND_PATH_TOSTRING(HLUA_PREPEND_PATH));
#endif
#ifdef HLUA_PREPEND_CPATH
hlua_prepend_path(L, "cpath", HLUA_PREPEND_PATH_TOSTRING(HLUA_PREPEND_CPATH));
#endif
#undef HLUA_PREPEND_PATH_TOSTRING
#undef HLUA_PREPEND_PATH_TOSTRING1
/* Apply configured prepend path */
list_for_each_entry(pp, &prepend_path_list, l)
hlua_prepend_path(L, pp->type, pp->path);
/*
*
* Create "core" object.
*
*/
/* This table entry is the object "core" base. */
lua_newtable(L);
/* set the thread id */
hlua_class_const_int(L, "thread", thread_num);
/* Push the loglevel constants. */
for (i = 0; i < NB_LOG_LEVELS; i++)
hlua_class_const_int(L, log_levels[i], i);
/* Register special functions. */
hlua_class_function(L, "register_init", hlua_register_init);
hlua_class_function(L, "register_task", hlua_register_task);
hlua_class_function(L, "register_fetches", hlua_register_fetches);
hlua_class_function(L, "register_converters", hlua_register_converters);
hlua_class_function(L, "register_action", hlua_register_action);
hlua_class_function(L, "register_service", hlua_register_service);
hlua_class_function(L, "register_cli", hlua_register_cli);
hlua_class_function(L, "yield", hlua_yield);
hlua_class_function(L, "set_nice", hlua_set_nice);
hlua_class_function(L, "sleep", hlua_sleep);
hlua_class_function(L, "msleep", hlua_msleep);
hlua_class_function(L, "add_acl", hlua_add_acl);
hlua_class_function(L, "del_acl", hlua_del_acl);
hlua_class_function(L, "set_map", hlua_set_map);
hlua_class_function(L, "del_map", hlua_del_map);
hlua_class_function(L, "tcp", hlua_socket_new);
hlua_class_function(L, "log", hlua_log);
hlua_class_function(L, "Debug", hlua_log_debug);
hlua_class_function(L, "Info", hlua_log_info);
hlua_class_function(L, "Warning", hlua_log_warning);
hlua_class_function(L, "Alert", hlua_log_alert);
hlua_class_function(L, "done", hlua_done);
hlua_fcn_reg_core_fcn(L);
lua_setglobal(L, "core");
/*
*
* Create "act" object.
*
*/
/* This table entry is the object "act" base. */
lua_newtable(L);
/* push action return constants */
hlua_class_const_int(L, "CONTINUE", ACT_RET_CONT);
hlua_class_const_int(L, "STOP", ACT_RET_STOP);
hlua_class_const_int(L, "YIELD", ACT_RET_YIELD);
hlua_class_const_int(L, "ERROR", ACT_RET_ERR);
hlua_class_const_int(L, "DONE", ACT_RET_DONE);
hlua_class_const_int(L, "DENY", ACT_RET_DENY);
hlua_class_const_int(L, "ABORT", ACT_RET_ABRT);
hlua_class_const_int(L, "INVALID", ACT_RET_INV);
hlua_class_function(L, "wake_time", hlua_set_wake_time);
lua_setglobal(L, "act");
/*
*
* Register class Map
*
*/
/* This table entry is the object "Map" base. */
lua_newtable(L);
/* register pattern types. */
for (i=0; i<PAT_MATCH_NUM; i++)
hlua_class_const_int(L, pat_match_names[i], i);
for (i=0; i<PAT_MATCH_NUM; i++) {
snprintf(trash.area, trash.size, "_%s", pat_match_names[i]);
hlua_class_const_int(L, trash.area, i);
}
/* register constructor. */
hlua_class_function(L, "new", hlua_map_new);
/* Create and fill the metatable. */
lua_newtable(L);
/* Create and fill the __index entry. */
lua_pushstring(L, "__index");
lua_newtable(L);
/* Register . */
hlua_class_function(L, "lookup", hlua_map_lookup);
hlua_class_function(L, "slookup", hlua_map_slookup);
lua_rawset(L, -3);
/* Register previous table in the registry with reference and named entry.
* The function hlua_register_metatable() pops the stack, so we
* previously create a copy of the table.
*/
lua_pushvalue(L, -1); /* Copy the -1 entry and push it on the stack. */
class_map_ref = hlua_register_metatable(L, CLASS_MAP);
/* Assign the metatable to the mai Map object. */
lua_setmetatable(L, -2);
/* Set a name to the table. */
lua_setglobal(L, "Map");
/*
*
* Register class Channel
*
*/
/* Create and fill the metatable. */
lua_newtable(L);
/* Create and fill the __index entry. */
lua_pushstring(L, "__index");
lua_newtable(L);
/* Register . */
hlua_class_function(L, "get", hlua_channel_get);
hlua_class_function(L, "dup", hlua_channel_dup);
hlua_class_function(L, "getline", hlua_channel_getline);
hlua_class_function(L, "set", hlua_channel_set);
hlua_class_function(L, "append", hlua_channel_append);
hlua_class_function(L, "send", hlua_channel_send);
hlua_class_function(L, "forward", hlua_channel_forward);
hlua_class_function(L, "get_in_len", hlua_channel_get_in_len);
hlua_class_function(L, "get_out_len", hlua_channel_get_out_len);
hlua_class_function(L, "is_full", hlua_channel_is_full);
hlua_class_function(L, "is_resp", hlua_channel_is_resp);
lua_rawset(L, -3);
/* Register previous table in the registry with reference and named entry. */
class_channel_ref = hlua_register_metatable(L, CLASS_CHANNEL);
/*
*
* Register class Fetches
*
*/
/* Create and fill the metatable. */
lua_newtable(L);
/* Create and fill the __index entry. */
lua_pushstring(L, "__index");
lua_newtable(L);
/* Browse existing fetches and create the associated
* object method.
*/
sf = NULL;
while ((sf = sample_fetch_getnext(sf, &idx)) != NULL) {
/* gL.Tua doesn't support '.' and '-' in the function names, replace it
* by an underscore.
*/
strncpy(trash.area, sf->kw, trash.size);
trash.area[trash.size - 1] = '\0';
for (p = trash.area; *p; p++)
if (*p == '.' || *p == '-' || *p == '+')
*p = '_';
/* Register the function. */
lua_pushstring(L, trash.area);
lua_pushlightuserdata(L, sf);
lua_pushcclosure(L, hlua_run_sample_fetch, 1);
lua_rawset(L, -3);
}
lua_rawset(L, -3);
/* Register previous table in the registry with reference and named entry. */
class_fetches_ref = hlua_register_metatable(L, CLASS_FETCHES);
/*
*
* Register class Converters
*
*/
/* Create and fill the metatable. */
lua_newtable(L);
/* Create and fill the __index entry. */
lua_pushstring(L, "__index");
lua_newtable(L);
/* Browse existing converters and create the associated
* object method.
*/
sc = NULL;
while ((sc = sample_conv_getnext(sc, &idx)) != NULL) {
/* gL.Tua doesn't support '.' and '-' in the function names, replace it
* by an underscore.
*/
strncpy(trash.area, sc->kw, trash.size);
trash.area[trash.size - 1] = '\0';
for (p = trash.area; *p; p++)
if (*p == '.' || *p == '-' || *p == '+')
*p = '_';
/* Register the function. */
lua_pushstring(L, trash.area);
lua_pushlightuserdata(L, sc);
lua_pushcclosure(L, hlua_run_sample_conv, 1);
lua_rawset(L, -3);
}
lua_rawset(L, -3);
/* Register previous table in the registry with reference and named entry. */
class_converters_ref = hlua_register_metatable(L, CLASS_CONVERTERS);
/*
*
* Register class HTTP
*
*/
/* Create and fill the metatable. */
lua_newtable(L);
/* Create and fill the __index entry. */
lua_pushstring(L, "__index");
lua_newtable(L);
/* Register Lua functions. */
hlua_class_function(L, "req_get_headers",hlua_http_req_get_headers);
hlua_class_function(L, "req_del_header", hlua_http_req_del_hdr);
hlua_class_function(L, "req_rep_header", hlua_http_req_rep_hdr);
hlua_class_function(L, "req_rep_value", hlua_http_req_rep_val);
hlua_class_function(L, "req_add_header", hlua_http_req_add_hdr);
hlua_class_function(L, "req_set_header", hlua_http_req_set_hdr);
hlua_class_function(L, "req_set_method", hlua_http_req_set_meth);
hlua_class_function(L, "req_set_path", hlua_http_req_set_path);
hlua_class_function(L, "req_set_query", hlua_http_req_set_query);
hlua_class_function(L, "req_set_uri", hlua_http_req_set_uri);
hlua_class_function(L, "res_get_headers",hlua_http_res_get_headers);
hlua_class_function(L, "res_del_header", hlua_http_res_del_hdr);
hlua_class_function(L, "res_rep_header", hlua_http_res_rep_hdr);
hlua_class_function(L, "res_rep_value", hlua_http_res_rep_val);
hlua_class_function(L, "res_add_header", hlua_http_res_add_hdr);
hlua_class_function(L, "res_set_header", hlua_http_res_set_hdr);
hlua_class_function(L, "res_set_status", hlua_http_res_set_status);
lua_rawset(L, -3);
/* Register previous table in the registry with reference and named entry. */
class_http_ref = hlua_register_metatable(L, CLASS_HTTP);
/*
*
* Register class AppletTCP
*
*/
/* Create and fill the metatable. */
lua_newtable(L);
/* Create and fill the __index entry. */
lua_pushstring(L, "__index");
lua_newtable(L);
/* Register Lua functions. */
hlua_class_function(L, "getline", hlua_applet_tcp_getline);
hlua_class_function(L, "receive", hlua_applet_tcp_recv);
hlua_class_function(L, "send", hlua_applet_tcp_send);
hlua_class_function(L, "set_priv", hlua_applet_tcp_set_priv);
hlua_class_function(L, "get_priv", hlua_applet_tcp_get_priv);
hlua_class_function(L, "set_var", hlua_applet_tcp_set_var);
hlua_class_function(L, "unset_var", hlua_applet_tcp_unset_var);
hlua_class_function(L, "get_var", hlua_applet_tcp_get_var);
lua_settable(L, -3);
/* Register previous table in the registry with reference and named entry. */
class_applet_tcp_ref = hlua_register_metatable(L, CLASS_APPLET_TCP);
/*
*
* Register class AppletHTTP
*
*/
/* Create and fill the metatable. */
lua_newtable(L);
/* Create and fill the __index entry. */
lua_pushstring(L, "__index");
lua_newtable(L);
/* Register Lua functions. */
hlua_class_function(L, "set_priv", hlua_applet_http_set_priv);
hlua_class_function(L, "get_priv", hlua_applet_http_get_priv);
hlua_class_function(L, "set_var", hlua_applet_http_set_var);
hlua_class_function(L, "unset_var", hlua_applet_http_unset_var);
hlua_class_function(L, "get_var", hlua_applet_http_get_var);
hlua_class_function(L, "getline", hlua_applet_http_getline);
hlua_class_function(L, "receive", hlua_applet_http_recv);
hlua_class_function(L, "send", hlua_applet_http_send);
hlua_class_function(L, "add_header", hlua_applet_http_addheader);
hlua_class_function(L, "set_status", hlua_applet_http_status);
hlua_class_function(L, "start_response", hlua_applet_http_start_response);
lua_settable(L, -3);
/* Register previous table in the registry with reference and named entry. */
class_applet_http_ref = hlua_register_metatable(L, CLASS_APPLET_HTTP);
/*
*
* Register class TXN
*
*/
/* Create and fill the metatable. */
lua_newtable(L);
/* Create and fill the __index entry. */
lua_pushstring(L, "__index");
lua_newtable(L);
/* Register Lua functions. */
hlua_class_function(L, "set_priv", hlua_set_priv);
hlua_class_function(L, "get_priv", hlua_get_priv);
hlua_class_function(L, "set_var", hlua_set_var);
hlua_class_function(L, "unset_var", hlua_unset_var);
hlua_class_function(L, "get_var", hlua_get_var);
hlua_class_function(L, "done", hlua_txn_done);
hlua_class_function(L, "reply", hlua_txn_reply_new);
hlua_class_function(L, "set_loglevel", hlua_txn_set_loglevel);
hlua_class_function(L, "set_tos", hlua_txn_set_tos);
hlua_class_function(L, "set_mark", hlua_txn_set_mark);
hlua_class_function(L, "set_priority_class", hlua_txn_set_priority_class);
hlua_class_function(L, "set_priority_offset", hlua_txn_set_priority_offset);
hlua_class_function(L, "deflog", hlua_txn_deflog);
hlua_class_function(L, "log", hlua_txn_log);
hlua_class_function(L, "Debug", hlua_txn_log_debug);
hlua_class_function(L, "Info", hlua_txn_log_info);
hlua_class_function(L, "Warning", hlua_txn_log_warning);
hlua_class_function(L, "Alert", hlua_txn_log_alert);
lua_rawset(L, -3);
/* Register previous table in the registry with reference and named entry. */
class_txn_ref = hlua_register_metatable(L, CLASS_TXN);
/*
*
* Register class reply
*
*/
lua_newtable(L);
lua_pushstring(L, "__index");
lua_newtable(L);
hlua_class_function(L, "set_status", hlua_txn_reply_set_status);
hlua_class_function(L, "add_header", hlua_txn_reply_add_header);
hlua_class_function(L, "del_header", hlua_txn_reply_del_header);
hlua_class_function(L, "set_body", hlua_txn_reply_set_body);
lua_settable(L, -3); /* Sets the __index entry. */
class_txn_reply_ref = luaL_ref(L, LUA_REGISTRYINDEX);
/*
*
* Register class Socket
*
*/
/* Create and fill the metatable. */
lua_newtable(L);
/* Create and fill the __index entry. */
lua_pushstring(L, "__index");
lua_newtable(L);
#ifdef USE_OPENSSL
hlua_class_function(L, "connect_ssl", hlua_socket_connect_ssl);
#endif
hlua_class_function(L, "connect", hlua_socket_connect);
hlua_class_function(L, "send", hlua_socket_send);
hlua_class_function(L, "receive", hlua_socket_receive);
hlua_class_function(L, "close", hlua_socket_close);
hlua_class_function(L, "getpeername", hlua_socket_getpeername);
hlua_class_function(L, "getsockname", hlua_socket_getsockname);
hlua_class_function(L, "setoption", hlua_socket_setoption);
hlua_class_function(L, "settimeout", hlua_socket_settimeout);
lua_rawset(L, -3); /* Push the last 2 entries in the table at index -3 */
/* Register the garbage collector entry. */
lua_pushstring(L, "__gc");
lua_pushcclosure(L, hlua_socket_gc, 0);
lua_rawset(L, -3); /* Push the last 2 entries in the table at index -3 */
/* Register previous table in the registry with reference and named entry. */
class_socket_ref = hlua_register_metatable(L, CLASS_SOCKET);
lua_atpanic(L, hlua_panic_safe);
return L;
}
void hlua_init(void) {
int i;
char *errmsg;
#ifdef USE_OPENSSL
struct srv_kw *kw;
int tmp_error;
char *error;
char *args[] = { /* SSL client configuration. */
"ssl",
"verify",
"none",
NULL
};
#endif
/* Init post init function list head */
for (i = 0; i < MAX_THREADS + 1; i++)
LIST_INIT(&hlua_init_functions[i]);
/* Init state for common/shared lua parts */
hlua_state_id = 0;
ha_set_tid(0);
hlua_states[0] = hlua_init_state(0);
/* Init state 1 for thread 0. We have at least one thread. */
hlua_state_id = 1;
ha_set_tid(0);
hlua_states[1] = hlua_init_state(1);
/* Proxy and server configuration initialisation. */
socket_proxy = alloc_new_proxy("LUA-SOCKET", PR_CAP_FE|PR_CAP_BE|PR_CAP_LUA, &errmsg);
if (!socket_proxy) {
fprintf(stderr, "Lua init: %s\n", errmsg);
exit(1);
}
proxy_preset_defaults(socket_proxy);
/* Init TCP server: unchanged parameters */
socket_tcp = new_server(socket_proxy);
if (!socket_tcp) {
fprintf(stderr, "Lua init: failed to allocate tcp server socket\n");
exit(1);
}
#ifdef USE_OPENSSL
/* Init TCP server: unchanged parameters */
socket_ssl = new_server(socket_proxy);
if (!socket_ssl) {
fprintf(stderr, "Lua init: failed to allocate ssl server socket\n");
exit(1);
}
socket_ssl->use_ssl = 1;
socket_ssl->xprt = xprt_get(XPRT_SSL);
for (i = 0; args[i] != NULL; i++) {
if ((kw = srv_find_kw(args[i])) != NULL) { /* Maybe it's registered server keyword */
/*
*
* If the keyword is not known, we can search in the registered
* server keywords. This is useful to configure special SSL
* features like client certificates and ssl_verify.
*
*/
tmp_error = kw->parse(args, &i, socket_proxy, socket_ssl, &error);
if (tmp_error != 0) {
fprintf(stderr, "INTERNAL ERROR: %s\n", error);
abort(); /* This must be never arrives because the command line
not editable by the user. */
}
i += kw->skip;
}
}
#endif
}
static void hlua_deinit()
{
int thr;
for (thr = 0; thr < MAX_THREADS+1; thr++) {
if (hlua_states[thr])
lua_close(hlua_states[thr]);
}
free_server(socket_tcp);
#ifdef USE_OPENSSL
free_server(socket_ssl);
#endif
free_proxy(socket_proxy);
}
REGISTER_POST_DEINIT(hlua_deinit);
static void hlua_register_build_options(void)
{
char *ptr = NULL;
memprintf(&ptr, "Built with Lua version : %s", LUA_RELEASE);
hap_register_build_opts(ptr, 1);
}
INITCALL0(STG_REGISTER, hlua_register_build_options);