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git01.mediatek.com / haproxy / ceae85ba4a6032d30a8736d97acb76201f6b4715 / . / src / flt_spoe.c
blob: 42e9c0c16bf01ce43e4831931c32becdd3657eaf [file] [log] [blame]
/*
* Stream processing offload engine management.
*
* Copyright 2016 HAProxy Technologies, Christopher Faulet <cfaulet@haproxy.com>
*
* 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.
*
*/
#include <ctype.h>
#include <errno.h>
#include <common/cfgparse.h>
#include <common/compat.h>
#include <common/config.h>
#include <common/debug.h>
#include <common/memory.h>
#include <common/time.h>
#include <types/arg.h>
#include <types/global.h>
#include <types/spoe.h>
#include <proto/arg.h>
#include <proto/backend.h>
#include <proto/filters.h>
#include <proto/freq_ctr.h>
#include <proto/frontend.h>
#include <proto/log.h>
#include <proto/proto_http.h>
#include <proto/proxy.h>
#include <proto/sample.h>
#include <proto/session.h>
#include <proto/signal.h>
#include <proto/spoe.h>
#include <proto/stream.h>
#include <proto/stream_interface.h>
#include <proto/task.h>
#include <proto/vars.h>
#if defined(DEBUG_SPOE) || defined(DEBUG_FULL)
#define SPOE_PRINTF(x...) fprintf(x)
#else
#define SPOE_PRINTF(x...)
#endif
/* Reserved 4 bytes to the frame size. So a frame and its size can be written
* together in a buffer */
#define MAX_FRAME_SIZE global.tune.bufsize - 4
/* The minimum size for a frame */
#define MIN_FRAME_SIZE 256
/* Reserved for the metadata and the frame type.
* So <MAX_FRAME_SIZE> - <FRAME_HDR_SIZE> is the maximum payload size */
#define FRAME_HDR_SIZE 32
/* Helper to get SPOE ctx inside an appctx */
#define SPOE_APPCTX(appctx) ((struct spoe_appctx *)((appctx)->ctx.spoe.ptr))
/* SPOE filter id. Used to identify SPOE filters */
const char *spoe_filter_id = "SPOE filter";
/* Set if the handle on SIGUSR1 is registered */
static int sighandler_registered = 0;
/* proxy used during the parsing */
struct proxy *curproxy = NULL;
/* The name of the SPOE engine, used during the parsing */
char *curengine = NULL;
/* SPOE agent used during the parsing */
struct spoe_agent *curagent = NULL;
/* SPOE message used during the parsing */
struct spoe_message *curmsg = NULL;
/* list of SPOE messages and placeholders used during the parsing */
struct list curmsgs;
struct list curmps;
/* Pools used to allocate SPOE structs */
static struct pool_head *pool2_spoe_ctx = NULL;
static struct pool_head *pool2_spoe_appctx = NULL;
struct flt_ops spoe_ops;
static int spoe_queue_context(struct spoe_context *ctx);
static int spoe_acquire_buffer(struct buffer **buf, struct buffer_wait *buffer_wait);
static void spoe_release_buffer(struct buffer **buf, struct buffer_wait *buffer_wait);
/********************************************************************
* helper functions/globals
********************************************************************/
static void
spoe_release_msg_placeholder(struct spoe_msg_placeholder *mp)
{
if (!mp)
return;
free(mp->id);
free(mp);
}
static void
spoe_release_message(struct spoe_message *msg)
{
struct spoe_arg *arg, *back;
if (!msg)
return;
free(msg->id);
free(msg->conf.file);
list_for_each_entry_safe(arg, back, &msg->args, list) {
release_sample_expr(arg->expr);
free(arg->name);
LIST_DEL(&arg->list);
free(arg);
}
free(msg);
}
static void
spoe_release_agent(struct spoe_agent *agent)
{
struct spoe_message *msg, *back;
int i;
if (!agent)
return;
free(agent->id);
free(agent->conf.file);
free(agent->var_pfx);
free(agent->engine_id);
free(agent->var_on_error);
for (i = 0; i < SPOE_EV_EVENTS; ++i) {
list_for_each_entry_safe(msg, back, &agent->messages[i], list) {
LIST_DEL(&msg->list);
spoe_release_message(msg);
}
}
free(agent);
}
static const char *spoe_frm_err_reasons[SPOE_FRM_ERRS] = {
[SPOE_FRM_ERR_NONE] = "normal",
[SPOE_FRM_ERR_IO] = "I/O error",
[SPOE_FRM_ERR_TOUT] = "a timeout occurred",
[SPOE_FRM_ERR_TOO_BIG] = "frame is too big",
[SPOE_FRM_ERR_INVALID] = "invalid frame received",
[SPOE_FRM_ERR_NO_VSN] = "version value not found",
[SPOE_FRM_ERR_NO_FRAME_SIZE] = "max-frame-size value not found",
[SPOE_FRM_ERR_NO_CAP] = "capabilities value not found",
[SPOE_FRM_ERR_BAD_VSN] = "unsupported version",
[SPOE_FRM_ERR_BAD_FRAME_SIZE] = "max-frame-size too big or too small",
[SPOE_FRM_ERR_FRAG_NOT_SUPPORTED] = "fragmentation not supported",
[SPOE_FRM_ERR_INTERLACED_FRAMES] = "invalid interlaced frames",
[SPOE_FRM_ERR_FRAMEID_NOTFOUND] = "frame-id not found",
[SPOE_FRM_ERR_RES] = "resource allocation error",
[SPOE_FRM_ERR_UNKNOWN] = "an unknown error occurred",
};
static const char *spoe_event_str[SPOE_EV_EVENTS] = {
[SPOE_EV_ON_CLIENT_SESS] = "on-client-session",
[SPOE_EV_ON_TCP_REQ_FE] = "on-frontend-tcp-request",
[SPOE_EV_ON_TCP_REQ_BE] = "on-backend-tcp-request",
[SPOE_EV_ON_HTTP_REQ_FE] = "on-frontend-http-request",
[SPOE_EV_ON_HTTP_REQ_BE] = "on-backend-http-request",
[SPOE_EV_ON_SERVER_SESS] = "on-server-session",
[SPOE_EV_ON_TCP_RSP] = "on-tcp-response",
[SPOE_EV_ON_HTTP_RSP] = "on-http-response",
};
#if defined(DEBUG_SPOE) || defined(DEBUG_FULL)
static const char *spoe_ctx_state_str[SPOE_CTX_ST_ERROR+1] = {
[SPOE_CTX_ST_NONE] = "NONE",
[SPOE_CTX_ST_READY] = "READY",
[SPOE_CTX_ST_ENCODING_MSGS] = "ENCODING_MSGS",
[SPOE_CTX_ST_SENDING_MSGS] = "SENDING_MSGS",
[SPOE_CTX_ST_WAITING_ACK] = "WAITING_ACK",
[SPOE_CTX_ST_DONE] = "DONE",
[SPOE_CTX_ST_ERROR] = "ERROR",
};
static const char *spoe_appctx_state_str[SPOE_APPCTX_ST_END+1] = {
[SPOE_APPCTX_ST_CONNECT] = "CONNECT",
[SPOE_APPCTX_ST_CONNECTING] = "CONNECTING",
[SPOE_APPCTX_ST_IDLE] = "IDLE",
[SPOE_APPCTX_ST_PROCESSING] = "PROCESSING",
[SPOE_APPCTX_ST_SENDING_FRAG_NOTIFY] = "SENDING_FRAG_NOTIFY",
[SPOE_APPCTX_ST_WAITING_SYNC_ACK] = "WAITING_SYNC_ACK",
[SPOE_APPCTX_ST_DISCONNECT] = "DISCONNECT",
[SPOE_APPCTX_ST_DISCONNECTING] = "DISCONNECTING",
[SPOE_APPCTX_ST_EXIT] = "EXIT",
[SPOE_APPCTX_ST_END] = "END",
};
#endif
/* Used to generates a unique id for an engine. On success, it returns a
* allocated string. So it is the caller's reponsibility to release it. If the
* allocation failed, it returns NULL. */
static char *
generate_pseudo_uuid()
{
static int init = 0;
const char uuid_fmt[] = "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx";
const char uuid_chr[] = "0123456789ABCDEF-";
char *uuid;
int i;
if ((uuid = calloc(1, sizeof(uuid_fmt))) == NULL)
return NULL;
if (!init) {
srand(now_ms);
init = 1;
}
for (i = 0; i < sizeof(uuid_fmt)-1; i++) {
int r = rand () % 16;
switch (uuid_fmt[i]) {
case 'x' : uuid[i] = uuid_chr[r]; break;
case 'y' : uuid[i] = uuid_chr[(r & 0x03) | 0x08]; break;
default : uuid[i] = uuid_fmt[i]; break;
}
}
return uuid;
}
/* Returns the minimum number of appets alive at a time. This function is used
* to know if more applets should be created for an engine. */
static inline unsigned int
min_applets_act(struct spoe_agent *agent)
{
unsigned int nbsrv;
/* TODO: Add a config parameter to customize this value. Always 0 for
* now */
if (agent->min_applets)
return agent->min_applets;
/* Get the number of active servers for the backend */
nbsrv = (agent->b.be->srv_act
? agent->b.be->srv_act
: agent->b.be->srv_bck);
return 2*nbsrv;
}
/********************************************************************
* Functions that encode/decode SPOE frames
********************************************************************/
/* Helper to get static string length, excluding the terminating null byte */
#define SLEN(str) (sizeof(str)-1)
/* Predefined key used in HELLO/DISCONNECT frames */
#define SUPPORTED_VERSIONS_KEY "supported-versions"
#define VERSION_KEY "version"
#define MAX_FRAME_SIZE_KEY "max-frame-size"
#define CAPABILITIES_KEY "capabilities"
#define ENGINE_ID_KEY "engine-id"
#define HEALTHCHECK_KEY "healthcheck"
#define STATUS_CODE_KEY "status-code"
#define MSG_KEY "message"
struct spoe_version {
char *str;
int min;
int max;
};
/* All supported versions */
static struct spoe_version supported_versions[] = {
{"1.0", 1000, 1000},
{NULL, 0, 0}
};
/* Comma-separated list of supported versions */
#define SUPPORTED_VERSIONS_VAL "1.0"
/* Convert a string to a SPOE version value. The string must follow the format
* "MAJOR.MINOR". It will be concerted into the integer (1000 * MAJOR + MINOR).
* If an error occurred, -1 is returned. */
static int
spoe_str_to_vsn(const char *str, size_t len)
{
const char *p, *end;
int maj, min, vsn;
p = str;
end = str+len;
maj = min = 0;
vsn = -1;
/* skip leading spaces */
while (p < end && isspace(*p))
p++;
/* parse Major number, until the '.' */
while (*p != '.') {
if (p >= end || *p < '0' || *p > '9')
goto out;
maj *= 10;
maj += (*p - '0');
p++;
}
/* check Major version */
if (!maj)
goto out;
p++; /* skip the '.' */
if (p >= end || *p < '0' || *p > '9') /* Minor number is missing */
goto out;
/* Parse Minor number */
while (p < end) {
if (*p < '0' || *p > '9')
break;
min *= 10;
min += (*p - '0');
p++;
}
/* check Minor number */
if (min > 999)
goto out;
/* skip trailing spaces */
while (p < end && isspace(*p))
p++;
if (p != end)
goto out;
vsn = maj * 1000 + min;
out:
return vsn;
}
/* Encode the HELLO frame sent by HAProxy to an agent. It returns the number of
* encoded bytes in the frame on success, 0 if an encoding error occured and -1
* if a fatal error occurred. */
static int
spoe_prepare_hahello_frame(struct appctx *appctx, char *frame, size_t size)
{
struct chunk *chk;
struct spoe_agent *agent = SPOE_APPCTX(appctx)->agent;
char *p, *end;
unsigned int flags = SPOE_FRM_FL_FIN;
size_t sz;
p = frame;
end = frame+size;
/* Set Frame type */
*p++ = SPOE_FRM_T_HAPROXY_HELLO;
/* Set flags */
memcpy(p, (char *)&flags, 4);
p += 4;
/* No stream-id and frame-id for HELLO frames */
*p++ = 0; *p++ = 0;
/* There are 3 mandatory items: "supported-versions", "max-frame-size"
* and "capabilities" */
/* "supported-versions" K/V item */
sz = SLEN(SUPPORTED_VERSIONS_KEY);
if (spoe_encode_buffer(SUPPORTED_VERSIONS_KEY, sz, &p, end) == -1)
goto too_big;
*p++ = SPOE_DATA_T_STR;
sz = SLEN(SUPPORTED_VERSIONS_VAL);
if (spoe_encode_buffer(SUPPORTED_VERSIONS_VAL, sz, &p, end) == -1)
goto too_big;
/* "max-fram-size" K/V item */
sz = SLEN(MAX_FRAME_SIZE_KEY);
if (spoe_encode_buffer(MAX_FRAME_SIZE_KEY, sz, &p, end) == -1)
goto too_big;
*p++ = SPOE_DATA_T_UINT32;
if (spoe_encode_varint(SPOE_APPCTX(appctx)->max_frame_size, &p, end) == -1)
goto too_big;
/* "capabilities" K/V item */
sz = SLEN(CAPABILITIES_KEY);
if (spoe_encode_buffer(CAPABILITIES_KEY, sz, &p, end) == -1)
goto too_big;
*p++ = SPOE_DATA_T_STR;
chk = get_trash_chunk();
if (agent != NULL && (agent->flags & SPOE_FL_PIPELINING)) {
memcpy(chk->str, "pipelining", 10);
chk->len += 10;
}
if (agent != NULL && (agent->flags & SPOE_FL_ASYNC)) {
if (chk->len) chk->str[chk->len++] = ',';
memcpy(chk->str+chk->len, "async", 5);
chk->len += 5;
}
if (agent != NULL && (agent->flags & SPOE_FL_RCV_FRAGMENTATION)) {
if (chk->len) chk->str[chk->len++] = ',';
memcpy(chk->str+chk->len, "fragmentation", 13);
chk->len += 5;
}
if (spoe_encode_buffer(chk->str, chk->len, &p, end) == -1)
goto too_big;
/* (optionnal) "engine-id" K/V item, if present */
if (agent != NULL && agent->engine_id != NULL) {
sz = SLEN(ENGINE_ID_KEY);
if (spoe_encode_buffer(ENGINE_ID_KEY, sz, &p, end) == -1)
goto too_big;
*p++ = SPOE_DATA_T_STR;
sz = strlen(agent->engine_id);
if (spoe_encode_buffer(agent->engine_id, sz, &p, end) == -1)
goto too_big;
}
return (p - frame);
too_big:
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOO_BIG;
return 0;
}
/* Encode DISCONNECT frame sent by HAProxy to an agent. It returns the number of
* encoded bytes in the frame on success, 0 if an encoding error occurred and -1
* if a fatal error occurred. */
static int
spoe_prepare_hadiscon_frame(struct appctx *appctx, char *frame, size_t size)
{
const char *reason;
char *p, *end;
unsigned int flags = SPOE_FRM_FL_FIN;
size_t sz;
p = frame;
end = frame+size;
/* Set Frame type */
*p++ = SPOE_FRM_T_HAPROXY_DISCON;
/* Set flags */
memcpy(p, (char *)&flags, 4);
p += 4;
/* No stream-id and frame-id for DISCONNECT frames */
*p++ = 0; *p++ = 0;
if (SPOE_APPCTX(appctx)->status_code >= SPOE_FRM_ERRS)
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_UNKNOWN;
/* There are 2 mandatory items: "status-code" and "message" */
/* "status-code" K/V item */
sz = SLEN(STATUS_CODE_KEY);
if (spoe_encode_buffer(STATUS_CODE_KEY, sz, &p, end) == -1)
goto too_big;
*p++ = SPOE_DATA_T_UINT32;
if (spoe_encode_varint(SPOE_APPCTX(appctx)->status_code, &p, end) == -1)
goto too_big;
/* "message" K/V item */
sz = SLEN(MSG_KEY);
if (spoe_encode_buffer(MSG_KEY, sz, &p, end) == -1)
goto too_big;
/*Get the message corresponding to the status code */
reason = spoe_frm_err_reasons[SPOE_APPCTX(appctx)->status_code];
*p++ = SPOE_DATA_T_STR;
sz = strlen(reason);
if (spoe_encode_buffer(reason, sz, &p, end) == -1)
goto too_big;
return (p - frame);
too_big:
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOO_BIG;
return 0;
}
/* Encode the NOTIFY frame sent by HAProxy to an agent. It returns the number of
* encoded bytes in the frame on success, 0 if an encoding error occurred and -1
* if a fatal error occurred. */
static int
spoe_prepare_hanotify_frame(struct appctx *appctx, struct spoe_context *ctx,
char *frame, size_t size)
{
char *p, *end;
unsigned int stream_id, frame_id;
unsigned int flags = SPOE_FRM_FL_FIN;
size_t sz;
p = frame;
end = frame+size;
stream_id = ctx->stream_id;
frame_id = ctx->frame_id;
if (ctx->flags & SPOE_CTX_FL_FRAGMENTED) {
/* The fragmentation is not supported by the applet */
if (!(SPOE_APPCTX(appctx)->flags & SPOE_APPCTX_FL_FRAGMENTATION)) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_FRAG_NOT_SUPPORTED;
return -1;
}
flags = ctx->frag_ctx.flags;
}
/* Set Frame type */
*p++ = SPOE_FRM_T_HAPROXY_NOTIFY;
/* Set flags */
memcpy(p, (char *)&flags, 4);
p += 4;
/* Set stream-id and frame-id */
if (spoe_encode_varint(stream_id, &p, end) == -1)
goto too_big;
if (spoe_encode_varint(frame_id, &p, end) == -1)
goto too_big;
/* Copy encoded messages, if possible */
sz = ctx->buffer->i;
if (p + sz >= end)
goto too_big;
memcpy(p, ctx->buffer->p, sz);
p += sz;
return (p - frame);
too_big:
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOO_BIG;
return 0;
}
/* Encode next part of a fragmented frame sent by HAProxy to an agent. It
* returns the number of encoded bytes in the frame on success, 0 if an encoding
* error occurred and -1 if a fatal error occurred. */
static int
spoe_prepare_hafrag_frame(struct appctx *appctx, struct spoe_context *ctx,
char *frame, size_t size)
{
char *p, *end;
unsigned int stream_id, frame_id;
unsigned int flags;
size_t sz;
p = frame;
end = frame+size;
/* <ctx> is null when the stream has aborted the processing of a
* fragmented frame. In this case, we must notify the corresponding
* agent using ids stored in <frag_ctx>. */
if (ctx == NULL) {
flags = (SPOE_FRM_FL_FIN|SPOE_FRM_FL_ABRT);
stream_id = SPOE_APPCTX(appctx)->frag_ctx.cursid;
frame_id = SPOE_APPCTX(appctx)->frag_ctx.curfid;
}
else {
flags = ctx->frag_ctx.flags;
stream_id = ctx->stream_id;
frame_id = ctx->frame_id;
}
/* Set Frame type */
*p++ = SPOE_FRM_T_UNSET;
/* Set flags */
memcpy(p, (char *)&flags, 4);
p += 4;
/* Set stream-id and frame-id */
if (spoe_encode_varint(stream_id, &p, end) == -1)
goto too_big;
if (spoe_encode_varint(frame_id, &p, end) == -1)
goto too_big;
if (ctx == NULL)
goto end;
/* Copy encoded messages, if possible */
sz = ctx->buffer->i;
if (p + sz >= end)
goto too_big;
memcpy(p, ctx->buffer->p, sz);
p += sz;
end:
return (p - frame);
too_big:
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOO_BIG;
return 0;
}
/* Decode and process the HELLO frame sent by an agent. It returns the number of
* read bytes on success, 0 if a decoding error occurred, and -1 if a fatal
* error occurred. */
static int
spoe_handle_agenthello_frame(struct appctx *appctx, char *frame, size_t size)
{
struct spoe_agent *agent = SPOE_APPCTX(appctx)->agent;
char *p, *end;
int vsn, max_frame_size;
unsigned int flags;
p = frame;
end = frame + size;
/* Check frame type */
if (*p++ != SPOE_FRM_T_AGENT_HELLO) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
if (size < 7 /* TYPE + METADATA */) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
/* Retrieve flags */
memcpy((char *)&flags, p, 4);
p += 4;
/* Fragmentation is not supported for HELLO frame */
if (!(flags & SPOE_FRM_FL_FIN)) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_FRAG_NOT_SUPPORTED;
return -1;
}
/* stream-id and frame-id must be cleared */
if (*p != 0 || *(p+1) != 0) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
p += 2;
/* There are 3 mandatory items: "version", "max-frame-size" and
* "capabilities" */
/* Loop on K/V items */
vsn = max_frame_size = flags = 0;
while (p < end) {
char *str;
size_t sz;
int ret;
/* Decode the item key */
ret = spoe_decode_buffer(&p, end, &str, &sz);
if (ret == -1 || !sz) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
/* Check "version" K/V item */
if (!memcmp(str, VERSION_KEY, sz)) {
int i, type = *p++;
/* The value must be a string */
if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_STR) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
if (spoe_decode_buffer(&p, end, &str, &sz) == -1) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
vsn = spoe_str_to_vsn(str, sz);
if (vsn == -1) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_BAD_VSN;
return -1;
}
for (i = 0; supported_versions[i].str != NULL; ++i) {
if (vsn >= supported_versions[i].min &&
vsn <= supported_versions[i].max)
break;
}
if (supported_versions[i].str == NULL) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_BAD_VSN;
return -1;
}
}
/* Check "max-frame-size" K/V item */
else if (!memcmp(str, MAX_FRAME_SIZE_KEY, sz)) {
int type = *p++;
/* The value must be integer */
if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT32 &&
(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT64 &&
(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT32 &&
(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT64) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
if (spoe_decode_varint(&p, end, &sz) == -1) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
if (sz < MIN_FRAME_SIZE ||
sz > SPOE_APPCTX(appctx)->max_frame_size) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_BAD_FRAME_SIZE;
return -1;
}
max_frame_size = sz;
}
/* Check "capabilities" K/V item */
else if (!memcmp(str, CAPABILITIES_KEY, sz)) {
int type = *p++;
/* The value must be a string */
if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_STR) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
if (spoe_decode_buffer(&p, end, &str, &sz) == -1) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
while (sz) {
char *delim;
/* Skip leading spaces */
for (; isspace(*str) && sz; str++, sz--);
if (sz >= 10 && !strncmp(str, "pipelining", 10)) {
str += 10; sz -= 10;
if (!sz || isspace(*str) || *str == ',')
flags |= SPOE_APPCTX_FL_PIPELINING;
}
else if (sz >= 5 && !strncmp(str, "async", 5)) {
str += 5; sz -= 5;
if (!sz || isspace(*str) || *str == ',')
flags |= SPOE_APPCTX_FL_ASYNC;
}
else if (sz >= 13 && !strncmp(str, "fragmentation", 13)) {
str += 13; sz -= 13;
if (!sz || isspace(*str) || *str == ',')
flags |= SPOE_APPCTX_FL_FRAGMENTATION;
}
/* Get the next comma or break */
if (!sz || (delim = memchr(str, ',', sz)) == NULL)
break;
delim++;
sz -= (delim - str);
str = delim;
}
}
else {
/* Silently ignore unknown item */
if (spoe_skip_data(&p, end) == -1) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
}
}
/* Final checks */
if (!vsn) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_NO_VSN;
return -1;
}
if (!max_frame_size) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_NO_FRAME_SIZE;
return -1;
}
if ((flags & SPOE_APPCTX_FL_PIPELINING) && !(agent->flags & SPOE_FL_PIPELINING))
flags &= ~SPOE_APPCTX_FL_PIPELINING;
if ((flags & SPOE_APPCTX_FL_ASYNC) && !(agent->flags & SPOE_FL_ASYNC))
flags &= ~SPOE_APPCTX_FL_ASYNC;
SPOE_APPCTX(appctx)->version = (unsigned int)vsn;
SPOE_APPCTX(appctx)->max_frame_size = (unsigned int)max_frame_size;
SPOE_APPCTX(appctx)->flags |= flags;
return (p - frame);
}
/* Decode DISCONNECT frame sent by an agent. It returns the number of by read
* bytes on success, 0 if the frame can be ignored and -1 if an error
* occurred. */
static int
spoe_handle_agentdiscon_frame(struct appctx *appctx, char *frame, size_t size)
{
char *p, *end;
unsigned int flags;
p = frame;
end = frame + size;
/* Check frame type */
if (*p++ != SPOE_FRM_T_AGENT_DISCON) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
if (size < 7 /* TYPE + METADATA */) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
/* Retrieve flags */
memcpy((char *)&flags, p, 4);
p += 4;
/* Fragmentation is not supported for DISCONNECT frame */
if (!(flags & SPOE_FRM_FL_FIN)) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_FRAG_NOT_SUPPORTED;
return -1;
}
/* stream-id and frame-id must be cleared */
if (*p != 0 || *(p+1) != 0) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
p += 2;
/* There are 2 mandatory items: "status-code" and "message" */
/* Loop on K/V items */
while (p < end) {
char *str;
size_t sz;
int ret;
/* Decode the item key */
ret = spoe_decode_buffer(&p, end, &str, &sz);
if (ret == -1 || !sz) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
/* Check "status-code" K/V item */
if (!memcmp(str, STATUS_CODE_KEY, sz)) {
int type = *p++;
/* The value must be an integer */
if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT32 &&
(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT64 &&
(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT32 &&
(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT64) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
if (spoe_decode_varint(&p, end, &sz) == -1) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
SPOE_APPCTX(appctx)->status_code = sz;
}
/* Check "message" K/V item */
else if (!memcmp(str, MSG_KEY, sz)) {
int type = *p++;
/* The value must be a string */
if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_STR) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
ret = spoe_decode_buffer(&p, end, &str, &sz);
if (ret == -1 || sz > 255) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
#if defined(DEBUG_SPOE) || defined(DEBUG_FULL)
SPOE_APPCTX(appctx)->reason = str;
SPOE_APPCTX(appctx)->rlen = sz;
#endif
}
else {
/* Silently ignore unknown item */
if (spoe_skip_data(&p, end) == -1) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
}
}
return (p - frame);
}
/* Decode ACK frame sent by an agent. It returns the number of read bytes on
* success, 0 if the frame can be ignored and -1 if an error occurred. */
static int
spoe_handle_agentack_frame(struct appctx *appctx, struct spoe_context **ctx,
char *frame, size_t size)
{
struct spoe_agent *agent = SPOE_APPCTX(appctx)->agent;
char *p, *end;
uint64_t stream_id, frame_id;
int len;
unsigned int flags;
p = frame;
end = frame + size;
*ctx = NULL;
/* Check frame type */
if (*p++ != SPOE_FRM_T_AGENT_ACK) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
if (size < 7 /* TYPE + METADATA */) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
/* Retrieve flags */
memcpy((char *)&flags, p, 4);
p += 4;
/* Fragmentation is not supported for now */
if (!(flags & SPOE_FRM_FL_FIN)) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_FRAG_NOT_SUPPORTED;
return -1;
}
/* Get the stream-id and the frame-id */
if (spoe_decode_varint(&p, end, &stream_id) == -1) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
if (spoe_decode_varint(&p, end, &frame_id) == -1) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
/* Try to find the corresponding SPOE context */
if (SPOE_APPCTX(appctx)->flags & SPOE_APPCTX_FL_ASYNC) {
list_for_each_entry((*ctx), &agent->waiting_queue, list) {
if ((*ctx)->stream_id == (unsigned int)stream_id &&
(*ctx)->frame_id == (unsigned int)frame_id)
goto found;
}
}
else {
list_for_each_entry((*ctx), &SPOE_APPCTX(appctx)->waiting_queue, list) {
if ((*ctx)->stream_id == (unsigned int)stream_id &&
(*ctx)->frame_id == (unsigned int)frame_id)
goto found;
}
}
if (SPOE_APPCTX(appctx)->frag_ctx.ctx &&
SPOE_APPCTX(appctx)->frag_ctx.cursid == (unsigned int)stream_id &&
SPOE_APPCTX(appctx)->frag_ctx.curfid == (unsigned int)frame_id) {
/* ABRT bit is set for an unfinished fragmented frame */
if (flags & SPOE_FRM_FL_ABRT) {
*ctx = SPOE_APPCTX(appctx)->frag_ctx.ctx;
(*ctx)->frag_ctx.spoe_appctx = NULL;
(*ctx)->state = SPOE_CTX_ST_ERROR;
(*ctx)->status_code = SPOE_CTX_ERR_FRAG_FRAME_ABRT;
/* Ignore the payload */
goto end;
}
/* TODO: Handle more flags for fragmented frames: RESUME, FINISH... */
/* For now, we ignore the ack */
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_INVALID;
return 0;
}
/* No Stream found, ignore the frame */
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
" - Ignore ACK frame"
" - stream-id=%u - frame-id=%u\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, appctx,
(unsigned int)stream_id, (unsigned int)frame_id);
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_FRAMEID_NOTFOUND;
return 0;
found:
if (!spoe_acquire_buffer(&SPOE_APPCTX(appctx)->buffer,
&SPOE_APPCTX(appctx)->buffer_wait)) {
*ctx = NULL;
return 1; /* Retry later */
}
/* Copy encoded actions */
len = (end - p);
memcpy(SPOE_APPCTX(appctx)->buffer->p, p, len);
SPOE_APPCTX(appctx)->buffer->i = len;
p += len;
/* Transfer the buffer ownership to the SPOE context */
(*ctx)->buffer = SPOE_APPCTX(appctx)->buffer;
SPOE_APPCTX(appctx)->buffer = &buf_empty;
(*ctx)->state = SPOE_CTX_ST_DONE;
end:
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
" - ACK frame received"
" - ctx=%p - stream-id=%u - frame-id=%u - flags=0x%08x\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, appctx, *ctx, (*ctx)->stream_id,
(*ctx)->frame_id, flags);
return (p - frame);
}
/* This function is used in cfgparse.c and declared in proto/checks.h. It
* prepare the request to send to agents during a healthcheck. It returns 0 on
* success and -1 if an error occurred. */
int
spoe_prepare_healthcheck_request(char **req, int *len)
{
struct appctx appctx;
struct spoe_appctx spoe_appctx;
char *frame, *end, buf[MAX_FRAME_SIZE+4];
size_t sz;
int ret;
memset(&appctx, 0, sizeof(appctx));
memset(&spoe_appctx, 0, sizeof(spoe_appctx));
memset(buf, 0, sizeof(buf));
appctx.ctx.spoe.ptr = &spoe_appctx;
SPOE_APPCTX(&appctx)->max_frame_size = MAX_FRAME_SIZE;
frame = buf+4; /* Reserved the 4 first bytes for the frame size */
end = frame + MAX_FRAME_SIZE;
ret = spoe_prepare_hahello_frame(&appctx, frame, MAX_FRAME_SIZE);
if (ret <= 0)
return -1;
frame += ret;
/* Add "healthcheck" K/V item */
sz = SLEN(HEALTHCHECK_KEY);
if (spoe_encode_buffer(HEALTHCHECK_KEY, sz, &frame, end) == -1)
return -1;
*frame++ = (SPOE_DATA_T_BOOL | SPOE_DATA_FL_TRUE);
*len = frame - buf;
sz = htonl(*len - 4);
memcpy(buf, (char *)&sz, 4);
if ((*req = malloc(*len)) == NULL)
return -1;
memcpy(*req, buf, *len);
return 0;
}
/* This function is used in checks.c and declared in proto/checks.h. It decode
* the response received from an agent during a healthcheck. It returns 0 on
* success and -1 if an error occurred. */
int
spoe_handle_healthcheck_response(char *frame, size_t size, char *err, int errlen)
{
struct appctx appctx;
struct spoe_appctx spoe_appctx;
memset(&appctx, 0, sizeof(appctx));
memset(&spoe_appctx, 0, sizeof(spoe_appctx));
appctx.ctx.spoe.ptr = &spoe_appctx;
SPOE_APPCTX(&appctx)->max_frame_size = MAX_FRAME_SIZE;
if (*frame == SPOE_FRM_T_AGENT_DISCON) {
spoe_handle_agentdiscon_frame(&appctx, frame, size);
goto error;
}
if (spoe_handle_agenthello_frame(&appctx, frame, size) <= 0)
goto error;
return 0;
error:
if (SPOE_APPCTX(&appctx)->status_code >= SPOE_FRM_ERRS)
SPOE_APPCTX(&appctx)->status_code = SPOE_FRM_ERR_UNKNOWN;
strncpy(err, spoe_frm_err_reasons[SPOE_APPCTX(&appctx)->status_code], errlen);
return -1;
}
/* Send a SPOE frame to an agent. It returns -1 when an error occurred, 0 when
* the frame can be ignored, 1 to retry later, and the frame legnth on
* success. */
static int
spoe_send_frame(struct appctx *appctx, char *buf, size_t framesz)
{
struct stream_interface *si = appctx->owner;
int ret;
uint32_t netint;
if (si_ic(si)->buf == &buf_empty)
goto retry;
/* 4 bytes are reserved at the beginning of <buf> to store the frame
* length. */
netint = htonl(framesz);
memcpy(buf, (char *)&netint, 4);
ret = bi_putblk(si_ic(si), buf, framesz+4);
if (ret <= 0) {
if (ret == -1) {
retry:
si_applet_cant_put(si);
return 1; /* retry */
}
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
return -1; /* error */
}
return framesz;
}
/* Receive a SPOE frame from an agent. It return -1 when an error occurred, 0
* when the frame can be ignored, 1 to retry later and the frame length on
* success. */
static int
spoe_recv_frame(struct appctx *appctx, char *buf, size_t framesz)
{
struct stream_interface *si = appctx->owner;
int ret;
uint32_t netint;
if (si_oc(si)->buf == &buf_empty)
goto retry;
ret = bo_getblk(si_oc(si), (char *)&netint, 4, 0);
if (ret > 0) {
framesz = ntohl(netint);
if (framesz > SPOE_APPCTX(appctx)->max_frame_size) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOO_BIG;
return -1;
}
ret = bo_getblk(si_oc(si), buf, framesz, 4);
}
if (ret <= 0) {
if (ret == 0) {
retry:
return 1; /* retry */
}
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
return -1; /* error */
}
return framesz;
}
/********************************************************************
* Functions that manage the SPOE applet
********************************************************************/
static int
spoe_wakeup_appctx(struct appctx *appctx)
{
si_applet_want_get(appctx->owner);
si_applet_want_put(appctx->owner);
appctx_wakeup(appctx);
return 1;
}
/* Callback function that catches applet timeouts. If a timeout occurred, we set
* <appctx->st1> flag and the SPOE applet is woken up. */
static struct task *
spoe_process_appctx(struct task * task)
{
struct appctx *appctx = task->context;
appctx->st1 = SPOE_APPCTX_ERR_NONE;
if (tick_is_expired(task->expire, now_ms)) {
task->expire = TICK_ETERNITY;
appctx->st1 = SPOE_APPCTX_ERR_TOUT;
}
spoe_wakeup_appctx(appctx);
return task;
}
/* Callback function that releases a SPOE applet. This happens when the
* connection with the agent is closed. */
static void
spoe_release_appctx(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct spoe_appctx *spoe_appctx = SPOE_APPCTX(appctx);
struct spoe_agent *agent;
struct spoe_context *ctx, *back;
if (spoe_appctx == NULL)
return;
appctx->ctx.spoe.ptr = NULL;
agent = spoe_appctx->agent;
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, appctx);
/* Remove applet from the list of running applets */
agent->applets_act--;
if (!LIST_ISEMPTY(&spoe_appctx->list)) {
LIST_DEL(&spoe_appctx->list);
LIST_INIT(&spoe_appctx->list);
}
/* Shutdown the server connection, if needed */
if (appctx->st0 != SPOE_APPCTX_ST_END) {
if (appctx->st0 == SPOE_APPCTX_ST_IDLE)
agent->applets_idle--;
appctx->st0 = SPOE_APPCTX_ST_END;
if (spoe_appctx->status_code == SPOE_FRM_ERR_NONE)
spoe_appctx->status_code = SPOE_FRM_ERR_IO;
si_shutw(si);
si_shutr(si);
si_ic(si)->flags |= CF_READ_NULL;
}
/* Destroy the task attached to this applet */
if (spoe_appctx->task) {
task_delete(spoe_appctx->task);
task_free(spoe_appctx->task);
}
/* Notify all waiting streams */
list_for_each_entry_safe(ctx, back, &spoe_appctx->waiting_queue, list) {
LIST_DEL(&ctx->list);
LIST_INIT(&ctx->list);
ctx->state = SPOE_CTX_ST_ERROR;
ctx->status_code = (spoe_appctx->status_code + 0x100);
task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
}
/* If the applet was processing a fragmented frame, notify the
* corresponding stream. */
if (spoe_appctx->frag_ctx.ctx) {
ctx = spoe_appctx->frag_ctx.ctx;
ctx->frag_ctx.spoe_appctx = NULL;
ctx->state = SPOE_CTX_ST_ERROR;
ctx->status_code = (spoe_appctx->status_code + 0x100);
task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
}
/* Release allocated memory */
spoe_release_buffer(&spoe_appctx->buffer,
&spoe_appctx->buffer_wait);
pool_free2(pool2_spoe_appctx, spoe_appctx);
if (!LIST_ISEMPTY(&agent->applets))
goto end;
/* If this was the last running applet, notify all waiting streams */
list_for_each_entry_safe(ctx, back, &agent->sending_queue, list) {
LIST_DEL(&ctx->list);
LIST_INIT(&ctx->list);
ctx->state = SPOE_CTX_ST_ERROR;
ctx->status_code = (spoe_appctx->status_code + 0x100);
task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
}
list_for_each_entry_safe(ctx, back, &agent->waiting_queue, list) {
LIST_DEL(&ctx->list);
LIST_INIT(&ctx->list);
ctx->state = SPOE_CTX_ST_ERROR;
ctx->status_code = (spoe_appctx->status_code + 0x100);
task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
}
end:
/* Update runtinme agent info */
agent->frame_size = agent->max_frame_size;
list_for_each_entry(spoe_appctx, &agent->applets, list)
agent->frame_size = MIN(spoe_appctx->max_frame_size,
agent->frame_size);
}
static int
spoe_handle_connect_appctx(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct spoe_agent *agent = SPOE_APPCTX(appctx)->agent;
char *frame, *buf;
int ret;
if (si->state <= SI_ST_CON) {
si_applet_want_put(si);
task_wakeup(si_strm(si)->task, TASK_WOKEN_MSG);
goto stop;
}
if (si->state != SI_ST_EST) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
goto exit;
}
if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) {
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
" - Connection timed out\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, appctx);
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOUT;
goto exit;
}
if (SPOE_APPCTX(appctx)->task->expire == TICK_ETERNITY)
SPOE_APPCTX(appctx)->task->expire =
tick_add_ifset(now_ms, agent->timeout.hello);
/* 4 bytes are reserved at the beginning of <buf> to store the frame
* length. */
buf = trash.str; frame = buf+4;
ret = spoe_prepare_hahello_frame(appctx, frame,
SPOE_APPCTX(appctx)->max_frame_size);
if (ret > 1)
ret = spoe_send_frame(appctx, buf, ret);
switch (ret) {
case -1: /* error */
case 0: /* ignore => an error, cannot be ignored */
goto exit;
case 1: /* retry later */
goto stop;
default:
/* HELLO frame successfully sent, now wait for the
* reply. */
appctx->st0 = SPOE_APPCTX_ST_CONNECTING;
goto next;
}
next:
return 0;
stop:
return 1;
exit:
appctx->st0 = SPOE_APPCTX_ST_EXIT;
return 0;
}
static int
spoe_handle_connecting_appctx(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct spoe_agent *agent = SPOE_APPCTX(appctx)->agent;
char *frame;
int ret;
if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
goto exit;
}
if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) {
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
" - Connection timed out\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, appctx);
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOUT;
goto exit;
}
frame = trash.str; trash.len = 0;
ret = spoe_recv_frame(appctx, frame,
SPOE_APPCTX(appctx)->max_frame_size);
if (ret > 1) {
if (*frame == SPOE_FRM_T_AGENT_DISCON) {
appctx->st0 = SPOE_APPCTX_ST_DISCONNECTING;
goto next;
}
trash.len = ret + 4;
ret = spoe_handle_agenthello_frame(appctx, frame, ret);
}
switch (ret) {
case -1: /* error */
case 0: /* ignore => an error, cannot be ignored */
appctx->st0 = SPOE_APPCTX_ST_DISCONNECT;
goto next;
case 1: /* retry later */
goto stop;
default:
/* HELLO handshake is finished, set the idle timeout and
* add the applet in the list of running applets. */
agent->applets_idle++;
appctx->st0 = SPOE_APPCTX_ST_IDLE;
LIST_DEL(&SPOE_APPCTX(appctx)->list);
LIST_ADD(&agent->applets, &SPOE_APPCTX(appctx)->list);
/* Update runtinme agent info */
agent->frame_size = MIN(SPOE_APPCTX(appctx)->max_frame_size,
agent->frame_size);
goto next;
}
next:
/* Do not forget to remove processed frame from the output buffer */
if (trash.len)
bo_skip(si_oc(si), trash.len);
SPOE_APPCTX(appctx)->task->expire =
tick_add_ifset(now_ms, agent->timeout.idle);
return 0;
stop:
return 1;
exit:
appctx->st0 = SPOE_APPCTX_ST_EXIT;
return 0;
}
static int
spoe_handle_sending_frame_appctx(struct appctx *appctx, int *skip)
{
struct spoe_agent *agent = SPOE_APPCTX(appctx)->agent;
struct spoe_context *ctx = NULL;
char *frame, *buf;
int ret;
/* 4 bytes are reserved at the beginning of <buf> to store the frame
* length. */
buf = trash.str; frame = buf+4;
if (appctx->st0 == SPOE_APPCTX_ST_SENDING_FRAG_NOTIFY) {
ctx = SPOE_APPCTX(appctx)->frag_ctx.ctx;
ret = spoe_prepare_hafrag_frame(appctx, ctx, frame,
SPOE_APPCTX(appctx)->max_frame_size);
}
else if (LIST_ISEMPTY(&agent->sending_queue)) {
*skip = 1;
ret = 1;
goto end;
}
else {
ctx = LIST_NEXT(&agent->sending_queue, typeof(ctx), list);
ret = spoe_prepare_hanotify_frame(appctx, ctx, frame,
SPOE_APPCTX(appctx)->max_frame_size);
}
if (ret > 1)
ret = spoe_send_frame(appctx, buf, ret);
switch (ret) {
case -1: /* error */
appctx->st0 = SPOE_APPCTX_ST_DISCONNECT;
goto end;
case 0: /* ignore */
if (ctx == NULL)
goto abort_frag_frame;
spoe_release_buffer(&ctx->buffer, &ctx->buffer_wait);
LIST_DEL(&ctx->list);
LIST_INIT(&ctx->list);
ctx->state = SPOE_CTX_ST_ERROR;
ctx->status_code = (SPOE_APPCTX(appctx)->status_code + 0x100);
task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
break;
case 1: /* retry */
*skip = 1;
break;
default:
if (ctx == NULL)
goto abort_frag_frame;
spoe_release_buffer(&ctx->buffer, &ctx->buffer_wait);
LIST_DEL(&ctx->list);
LIST_INIT(&ctx->list);
if (!(ctx->flags & SPOE_CTX_FL_FRAGMENTED) ||
(ctx->frag_ctx.flags & SPOE_FRM_FL_FIN))
goto no_frag_frame_sent;
else {
*skip = 1;
goto frag_frame_sent;
}
}
goto end;
frag_frame_sent:
appctx->st0 = SPOE_APPCTX_ST_SENDING_FRAG_NOTIFY;
SPOE_APPCTX(appctx)->frag_ctx.ctx = ctx;
SPOE_APPCTX(appctx)->frag_ctx.cursid = ctx->stream_id;
SPOE_APPCTX(appctx)->frag_ctx.curfid = ctx->frame_id;
ctx->frag_ctx.spoe_appctx = SPOE_APPCTX(appctx);
ctx->state = SPOE_CTX_ST_ENCODING_MSGS;
task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
goto end;
no_frag_frame_sent:
if (SPOE_APPCTX(appctx)->flags & SPOE_APPCTX_FL_ASYNC) {
appctx->st0 = SPOE_APPCTX_ST_PROCESSING;
LIST_ADDQ(&agent->waiting_queue, &ctx->list);
}
else if (SPOE_APPCTX(appctx)->flags & SPOE_APPCTX_FL_PIPELINING) {
appctx->st0 = SPOE_APPCTX_ST_PROCESSING;
LIST_ADDQ(&SPOE_APPCTX(appctx)->waiting_queue, &ctx->list);
}
else {
appctx->st0 = SPOE_APPCTX_ST_WAITING_SYNC_ACK;
LIST_ADDQ(&SPOE_APPCTX(appctx)->waiting_queue, &ctx->list);
}
SPOE_APPCTX(appctx)->frag_ctx.ctx = NULL;
SPOE_APPCTX(appctx)->frag_ctx.cursid = 0;
SPOE_APPCTX(appctx)->frag_ctx.curfid = 0;
ctx->frag_ctx.spoe_appctx = NULL;
ctx->state = SPOE_CTX_ST_WAITING_ACK;
goto end;
abort_frag_frame:
appctx->st0 = SPOE_APPCTX_ST_PROCESSING;
SPOE_APPCTX(appctx)->frag_ctx.ctx = NULL;
SPOE_APPCTX(appctx)->frag_ctx.cursid = 0;
SPOE_APPCTX(appctx)->frag_ctx.curfid = 0;
goto end;
end:
return ret;
}
static int
spoe_handle_receiving_frame_appctx(struct appctx *appctx, int *skip)
{
struct spoe_context *ctx = NULL;
char *frame;
int ret;
frame = trash.str; trash.len = 0;
ret = spoe_recv_frame(appctx, frame,
SPOE_APPCTX(appctx)->max_frame_size);
if (ret > 1) {
if (*frame == SPOE_FRM_T_AGENT_DISCON) {
appctx->st0 = SPOE_APPCTX_ST_DISCONNECTING;
goto end;
}
trash.len = ret + 4;
ret = spoe_handle_agentack_frame(appctx, &ctx, frame, ret);
}
switch (ret) {
case -1: /* error */
appctx->st0 = SPOE_APPCTX_ST_DISCONNECT;
break;
case 0: /* ignore */
break;
case 1: /* retry */
*skip = 1;
break;
default:
LIST_DEL(&ctx->list);
LIST_INIT(&ctx->list);
if (appctx->st0 == SPOE_APPCTX_ST_SENDING_FRAG_NOTIFY &&
ctx == SPOE_APPCTX(appctx)->frag_ctx.ctx) {
appctx->st0 = SPOE_APPCTX_ST_PROCESSING;
SPOE_APPCTX(appctx)->frag_ctx.ctx = NULL;
SPOE_APPCTX(appctx)->frag_ctx.cursid = 0;
SPOE_APPCTX(appctx)->frag_ctx.curfid = 0;
}
else if (appctx->st0 == SPOE_APPCTX_ST_WAITING_SYNC_ACK)
appctx->st0 = SPOE_APPCTX_ST_PROCESSING;
task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
break;
}
/* Do not forget to remove processed frame from the output buffer */
if (trash.len)
bo_skip(si_oc(appctx->owner), trash.len);
end:
return ret;
}
static int
spoe_handle_processing_appctx(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct spoe_agent *agent = SPOE_APPCTX(appctx)->agent;
unsigned int fpa = 0;
int ret, skip_sending = 0, skip_receiving = 0;
if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
goto exit;
}
if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOUT;
appctx->st0 = SPOE_APPCTX_ST_DISCONNECT;
appctx->st1 = SPOE_APPCTX_ERR_NONE;
goto next;
}
process:
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
" - process: fpa=%u/%u - skip_sending=%d - skip_receiving=%d"
" - appctx-state=%s\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, appctx, fpa, agent->max_fpa,
skip_sending, skip_receiving,
spoe_appctx_state_str[appctx->st0]);
if (fpa > agent->max_fpa)
goto stop;
else if (skip_sending || appctx->st0 == SPOE_APPCTX_ST_WAITING_SYNC_ACK) {
if (skip_receiving)
goto stop;
goto recv_frame;
}
/* send_frame */
ret = spoe_handle_sending_frame_appctx(appctx, &skip_sending);
switch (ret) {
case -1: /* error */
goto next;
case 0: /* ignore */
agent->sending_rate++;
fpa++;
break;
case 1: /* retry */
break;
default:
agent->sending_rate++;
fpa++;
break;
}
if (fpa > agent->max_fpa)
goto stop;
recv_frame:
if (skip_receiving)
goto process;
ret = spoe_handle_receiving_frame_appctx(appctx, &skip_receiving);
switch (ret) {
case -1: /* error */
goto next;
case 0: /* ignore */
fpa++;
break;
case 1: /* retry */
break;
default:
fpa++;
break;
}
goto process;
next:
SPOE_APPCTX(appctx)->task->expire =
tick_add_ifset(now_ms, agent->timeout.idle);
return 0;
stop:
if (appctx->st0 == SPOE_APPCTX_ST_PROCESSING) {
appctx->st0 = SPOE_APPCTX_ST_IDLE;
agent->applets_idle++;
}
if (fpa || (SPOE_APPCTX(appctx)->flags & SPOE_APPCTX_FL_PERSIST)) {
LIST_DEL(&SPOE_APPCTX(appctx)->list);
LIST_ADD(&agent->applets, &SPOE_APPCTX(appctx)->list);
if (fpa)
SPOE_APPCTX(appctx)->task->expire =
tick_add_ifset(now_ms, agent->timeout.idle);
}
return 1;
exit:
appctx->st0 = SPOE_APPCTX_ST_EXIT;
return 0;
}
static int
spoe_handle_disconnect_appctx(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct spoe_agent *agent = SPOE_APPCTX(appctx)->agent;
char *frame, *buf;
int ret;
if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO)
goto exit;
if (appctx->st1 == SPOE_APPCTX_ERR_TOUT)
goto exit;
/* 4 bytes are reserved at the beginning of <buf> to store the frame
* length. */
buf = trash.str; frame = buf+4;
ret = spoe_prepare_hadiscon_frame(appctx, frame,
SPOE_APPCTX(appctx)->max_frame_size);
if (ret > 1)
ret = spoe_send_frame(appctx, buf, ret);
switch (ret) {
case -1: /* error */
case 0: /* ignore => an error, cannot be ignored */
goto exit;
case 1: /* retry */
goto stop;
default:
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
" - disconnected by HAProxy (%d): %s\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, appctx,
SPOE_APPCTX(appctx)->status_code,
spoe_frm_err_reasons[SPOE_APPCTX(appctx)->status_code]);
appctx->st0 = SPOE_APPCTX_ST_DISCONNECTING;
goto next;
}
next:
SPOE_APPCTX(appctx)->task->expire =
tick_add_ifset(now_ms, agent->timeout.idle);
return 0;
stop:
return 1;
exit:
appctx->st0 = SPOE_APPCTX_ST_EXIT;
return 0;
}
static int
spoe_handle_disconnecting_appctx(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
char *frame;
int ret;
if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
goto exit;
}
if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) {
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_TOUT;
goto exit;
}
frame = trash.str; trash.len = 0;
ret = spoe_recv_frame(appctx, frame,
SPOE_APPCTX(appctx)->max_frame_size);
if (ret > 1) {
trash.len = ret + 4;
ret = spoe_handle_agentdiscon_frame(appctx, frame, ret);
}
switch (ret) {
case -1: /* error */
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
" - error on frame (%s)\n",
(int)now.tv_sec, (int)now.tv_usec,
((struct spoe_agent *)SPOE_APPCTX(appctx)->agent)->id,
__FUNCTION__, appctx,
spoe_frm_err_reasons[SPOE_APPCTX(appctx)->status_code]);
goto exit;
case 0: /* ignore */
goto next;
case 1: /* retry */
goto stop;
default:
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
" - disconnected by peer (%d): %.*s\n",
(int)now.tv_sec, (int)now.tv_usec,
((struct spoe_agent *)SPOE_APPCTX(appctx)->agent)->id,
__FUNCTION__, appctx, SPOE_APPCTX(appctx)->status_code,
SPOE_APPCTX(appctx)->rlen, SPOE_APPCTX(appctx)->reason);
goto exit;
}
next:
/* Do not forget to remove processed frame from the output buffer */
if (trash.len)
bo_skip(si_oc(appctx->owner), trash.len);
return 0;
stop:
return 1;
exit:
appctx->st0 = SPOE_APPCTX_ST_EXIT;
return 0;
}
/* I/O Handler processing messages exchanged with the agent */
static void
spoe_handle_appctx(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct spoe_agent *agent;
if (SPOE_APPCTX(appctx) == NULL)
return;
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_NONE;
agent = SPOE_APPCTX(appctx)->agent;
switchstate:
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
" - appctx-state=%s\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, appctx, spoe_appctx_state_str[appctx->st0]);
switch (appctx->st0) {
case SPOE_APPCTX_ST_CONNECT:
if (spoe_handle_connect_appctx(appctx))
goto out;
goto switchstate;
case SPOE_APPCTX_ST_CONNECTING:
if (spoe_handle_connecting_appctx(appctx))
goto out;
goto switchstate;
case SPOE_APPCTX_ST_IDLE:
if (stopping &&
LIST_ISEMPTY(&agent->sending_queue) &&
LIST_ISEMPTY(&SPOE_APPCTX(appctx)->waiting_queue)) {
SPOE_APPCTX(appctx)->task->expire =
tick_add_ifset(now_ms, agent->timeout.idle);
appctx->st0 = SPOE_APPCTX_ST_DISCONNECT;
goto switchstate;
}
agent->applets_idle--;
appctx->st0 = SPOE_APPCTX_ST_PROCESSING;
/* fall through */
case SPOE_APPCTX_ST_PROCESSING:
case SPOE_APPCTX_ST_SENDING_FRAG_NOTIFY:
case SPOE_APPCTX_ST_WAITING_SYNC_ACK:
if (spoe_handle_processing_appctx(appctx))
goto out;
goto switchstate;
case SPOE_APPCTX_ST_DISCONNECT:
if (spoe_handle_disconnect_appctx(appctx))
goto out;
goto switchstate;
case SPOE_APPCTX_ST_DISCONNECTING:
if (spoe_handle_disconnecting_appctx(appctx))
goto out;
goto switchstate;
case SPOE_APPCTX_ST_EXIT:
appctx->st0 = SPOE_APPCTX_ST_END;
SPOE_APPCTX(appctx)->task->expire = TICK_ETERNITY;
si_shutw(si);
si_shutr(si);
si_ic(si)->flags |= CF_READ_NULL;
/* fall through */
case SPOE_APPCTX_ST_END:
return;
}
out:
if (SPOE_APPCTX(appctx)->task->expire != TICK_ETERNITY)
task_queue(SPOE_APPCTX(appctx)->task);
si_oc(si)->flags |= CF_READ_DONTWAIT;
task_wakeup(si_strm(si)->task, TASK_WOKEN_IO);
}
struct applet spoe_applet = {
.obj_type = OBJ_TYPE_APPLET,
.name = "<SPOE>", /* used for logging */
.fct = spoe_handle_appctx,
.release = spoe_release_appctx,
};
/* Create a SPOE applet. On success, the created applet is returned, else
* NULL. */
static struct appctx *
spoe_create_appctx(struct spoe_config *conf)
{
struct appctx *appctx;
struct session *sess;
struct task *task;
struct stream *strm;
if ((appctx = appctx_new(&spoe_applet)) == NULL)
goto out_error;
appctx->ctx.spoe.ptr = pool_alloc_dirty(pool2_spoe_appctx);
if (SPOE_APPCTX(appctx) == NULL)
goto out_free_appctx;
memset(appctx->ctx.spoe.ptr, 0, pool2_spoe_appctx->size);
appctx->st0 = SPOE_APPCTX_ST_CONNECT;
if ((SPOE_APPCTX(appctx)->task = task_new()) == NULL)
goto out_free_spoe_appctx;
SPOE_APPCTX(appctx)->owner = appctx;
SPOE_APPCTX(appctx)->task->process = spoe_process_appctx;
SPOE_APPCTX(appctx)->task->expire = TICK_ETERNITY;
SPOE_APPCTX(appctx)->task->context = appctx;
SPOE_APPCTX(appctx)->agent = conf->agent;
SPOE_APPCTX(appctx)->version = 0;
SPOE_APPCTX(appctx)->max_frame_size = conf->agent->max_frame_size;
SPOE_APPCTX(appctx)->flags = 0;
SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_NONE;
SPOE_APPCTX(appctx)->buffer = &buf_empty;
LIST_INIT(&SPOE_APPCTX(appctx)->buffer_wait.list);
SPOE_APPCTX(appctx)->buffer_wait.target = appctx;
SPOE_APPCTX(appctx)->buffer_wait.wakeup_cb = (int (*)(void *))spoe_wakeup_appctx;
LIST_INIT(&SPOE_APPCTX(appctx)->list);
LIST_INIT(&SPOE_APPCTX(appctx)->waiting_queue);
sess = session_new(&conf->agent_fe, NULL, &appctx->obj_type);
if (!sess)
goto out_free_spoe;
if ((task = task_new()) == NULL)
goto out_free_sess;
if ((strm = stream_new(sess, task, &appctx->obj_type)) == NULL)
goto out_free_task;
stream_set_backend(strm, conf->agent->b.be);
/* applet is waiting for data */
si_applet_cant_get(&strm->si[0]);
appctx_wakeup(appctx);
strm->do_log = NULL;
strm->res.flags |= CF_READ_DONTWAIT;
conf->agent_fe.feconn++;
jobs++;
totalconn++;
task_wakeup(SPOE_APPCTX(appctx)->task, TASK_WOKEN_INIT);
LIST_ADDQ(&conf->agent->applets, &SPOE_APPCTX(appctx)->list);
conf->agent->applets_act++;
return appctx;
/* Error unrolling */
out_free_task:
task_free(task);
out_free_sess:
session_free(sess);
out_free_spoe:
task_free(SPOE_APPCTX(appctx)->task);
out_free_spoe_appctx:
pool_free2(pool2_spoe_appctx, SPOE_APPCTX(appctx));
out_free_appctx:
appctx_free(appctx);
out_error:
return NULL;
}
static int
spoe_queue_context(struct spoe_context *ctx)
{
struct spoe_config *conf = FLT_CONF(ctx->filter);
struct spoe_agent *agent = conf->agent;
struct appctx *appctx;
struct spoe_appctx *spoe_appctx;
unsigned int min_applets;
min_applets = min_applets_act(agent);
/* Check if we need to create a new SPOE applet or not. */
if (agent->applets_act >= min_applets &&
agent->applets_idle &&
agent->sending_rate)
goto end;
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - try to create new SPOE appctx\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id, __FUNCTION__,
ctx->strm);
/* Do not try to create a new applet if there is no server up for the
* agent's backend. */
if (!agent->b.be->srv_act && !agent->b.be->srv_bck) {
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - cannot create SPOE appctx: no server up\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, ctx->strm);
goto end;
}
/* Do not try to create a new applet if we have reached the maximum of
* connection per seconds */
if (agent->cps_max > 0) {
if (!freq_ctr_remain(&agent->conn_per_sec, agent->cps_max, 0)) {
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - cannot create SPOE appctx: max CPS reached\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, ctx->strm);
goto end;
}
}
appctx = spoe_create_appctx(conf);
if (appctx == NULL) {
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - failed to create SPOE appctx\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, ctx->strm);
send_log(ctx->strm->be, LOG_EMERG,
"SPOE: [%s] failed to create SPOE applet\n",
agent->id);
goto end;
}
if (agent->applets_act <= min_applets)
SPOE_APPCTX(appctx)->flags |= SPOE_APPCTX_FL_PERSIST;
/* Increase the per-process number of cumulated connections */
if (agent->cps_max > 0)
update_freq_ctr(&agent->conn_per_sec, 1);
end:
/* The only reason to return an error is when there is no applet */
if (LIST_ISEMPTY(&agent->applets)) {
ctx->status_code = SPOE_CTX_ERR_RES;
return -1;
}
/* Add the SPOE context in the sending queue and update all running
* info */
LIST_ADDQ(&agent->sending_queue, &ctx->list);
if (agent->sending_rate)
agent->sending_rate--;
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - Add stream in sending queue"
" - applets_act=%u - applets_idle=%u - sending_rate=%u\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id, __FUNCTION__,
ctx->strm, agent->applets_act, agent->applets_idle,
agent->sending_rate);
/* Finally try to wakeup the first IDLE applet found and move it at the
* end of the list. */
list_for_each_entry(spoe_appctx, &agent->applets, list) {
appctx = spoe_appctx->owner;
if (appctx->st0 == SPOE_APPCTX_ST_IDLE) {
spoe_wakeup_appctx(appctx);
LIST_DEL(&spoe_appctx->list);
LIST_ADDQ(&agent->applets, &spoe_appctx->list);
break;
}
}
return 1;
}
/***************************************************************************
* Functions that encode SPOE messages
**************************************************************************/
/* Encode SPOE messages for a specific event. Info in <ctx->frag_ctx>, if any,
* are used to handle fragmented content. On success it returns 1. If an error
* occurred, -1 is returned. */
static int
spoe_encode_messages(struct stream *s, struct spoe_context *ctx,
struct list *messages, int dir)
{
struct spoe_config *conf = FLT_CONF(ctx->filter);
struct spoe_agent *agent = conf->agent;
struct spoe_message *msg;
struct sample *smp;
struct spoe_arg *arg;
char *p, *end;
int ret;
p = ctx->buffer->p;
end = p + agent->frame_size - FRAME_HDR_SIZE;
/* Resume encoding of a SPOE message */
if (ctx->frag_ctx.curmsg != NULL) {
msg = ctx->frag_ctx.curmsg;
goto encode_message;
}
/* Loop on messages */
list_for_each_entry(msg, messages, list) {
ctx->frag_ctx.curmsg = msg;
ctx->frag_ctx.curarg = NULL;
ctx->frag_ctx.curoff = UINT_MAX;
encode_message:
/* Resume encoding of a SPOE argument */
if (ctx->frag_ctx.curarg != NULL) {
arg = ctx->frag_ctx.curarg;
goto encode_argument;
}
if (ctx->frag_ctx.curoff != UINT_MAX)
goto encode_msg_payload;
/* Check if there is enough space for the message name and the
* number of arguments. It implies <msg->id_len> is encoded on 2
* bytes, at most (< 2288). */
if (p + 2 + msg->id_len + 1 > end)
goto too_big;
/* Encode the message name */
if (spoe_encode_buffer(msg->id, msg->id_len, &p, end) == -1)
goto too_big;
/* Set the number of arguments for this message */
*p++ = msg->nargs;
ctx->frag_ctx.curoff = 0;
encode_msg_payload:
/* Loop on arguments */
list_for_each_entry(arg, &msg->args, list) {
ctx->frag_ctx.curarg = arg;
ctx->frag_ctx.curoff = UINT_MAX;
encode_argument:
if (ctx->frag_ctx.curoff != UINT_MAX)
goto encode_arg_value;
/* Encode the arguement name as a string. It can by NULL */
if (spoe_encode_buffer(arg->name, arg->name_len, &p, end) == -1)
goto too_big;
ctx->frag_ctx.curoff = 0;
encode_arg_value:
/* Fetch the arguement value */
smp = sample_process(s->be, s->sess, s,
dir|SMP_OPT_FINAL, arg->expr, NULL);
ret = spoe_encode_data(smp, &ctx->frag_ctx.curoff, &p, end);
if (ret == -1 || ctx->frag_ctx.curoff)
goto too_big;
}
}
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - encode %s messages - spoe_appctx=%p"
"- max_size=%u - encoded=%ld\n",
(int)now.tv_sec, (int)now.tv_usec,
agent->id, __FUNCTION__, s,
((ctx->flags & SPOE_CTX_FL_FRAGMENTED) ? "last fragment of" : "unfragmented"),
ctx->frag_ctx.spoe_appctx, (agent->frame_size - FRAME_HDR_SIZE),
p - ctx->buffer->p);
ctx->buffer->i = p - ctx->buffer->p;
ctx->frag_ctx.curmsg = NULL;
ctx->frag_ctx.curarg = NULL;
ctx->frag_ctx.curoff = 0;
ctx->frag_ctx.flags = SPOE_FRM_FL_FIN;
return 1;
too_big:
if (!(agent->flags & SPOE_FL_SND_FRAGMENTATION)) {
ctx->status_code = SPOE_CTX_ERR_TOO_BIG;
return -1;
}
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - encode fragmented messages - spoe_appctx=%p"
" - curmsg=%p - curarg=%p - curoff=%u"
" - max_size=%u - encoded=%ld\n",
(int)now.tv_sec, (int)now.tv_usec,
agent->id, __FUNCTION__, s, ctx->frag_ctx.spoe_appctx,
ctx->frag_ctx.curmsg, ctx->frag_ctx.curarg, ctx->frag_ctx.curoff,
(agent->frame_size - FRAME_HDR_SIZE), p - ctx->buffer->p);
ctx->buffer->i = p - ctx->buffer->p;
ctx->flags |= SPOE_CTX_FL_FRAGMENTED;
ctx->frag_ctx.flags &= ~SPOE_FRM_FL_FIN;
return 1;
}
/***************************************************************************
* Functions that handle SPOE actions
**************************************************************************/
/* Helper function to set a variable */
static void
spoe_set_var(struct spoe_context *ctx, char *scope, char *name, int len,
struct sample *smp)
{
struct spoe_config *conf = FLT_CONF(ctx->filter);
struct spoe_agent *agent = conf->agent;
char varname[64];
memset(varname, 0, sizeof(varname));
len = snprintf(varname, sizeof(varname), "%s.%s.%.*s",
scope, agent->var_pfx, len, name);
vars_set_by_name_ifexist(varname, len, smp);
}
/* Helper function to unset a variable */
static void
spoe_unset_var(struct spoe_context *ctx, char *scope, char *name, int len,
struct sample *smp)
{
struct spoe_config *conf = FLT_CONF(ctx->filter);
struct spoe_agent *agent = conf->agent;
char varname[64];
memset(varname, 0, sizeof(varname));
len = snprintf(varname, sizeof(varname), "%s.%s.%.*s",
scope, agent->var_pfx, len, name);
vars_unset_by_name_ifexist(varname, len, smp);
}
static inline int
spoe_decode_action_set_var(struct stream *s, struct spoe_context *ctx,
char **buf, char *end, int dir)
{
char *str, *scope, *p = *buf;
struct sample smp;
uint64_t sz;
int ret;
if (p + 2 >= end)
goto skip;
/* SET-VAR requires 3 arguments */
if (*p++ != 3)
goto skip;
switch (*p++) {
case SPOE_SCOPE_PROC: scope = "proc"; break;
case SPOE_SCOPE_SESS: scope = "sess"; break;
case SPOE_SCOPE_TXN : scope = "txn"; break;
case SPOE_SCOPE_REQ : scope = "req"; break;
case SPOE_SCOPE_RES : scope = "res"; break;
default: goto skip;
}
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
goto skip;
memset(&smp, 0, sizeof(smp));
smp_set_owner(&smp, s->be, s->sess, s, dir|SMP_OPT_FINAL);
if (spoe_decode_data(&p, end, &smp) == -1)
goto skip;
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - set-var '%s.%s.%.*s'\n",
(int)now.tv_sec, (int)now.tv_usec,
((struct spoe_config *)FLT_CONF(ctx->filter))->agent->id,
__FUNCTION__, s, scope,
((struct spoe_config *)FLT_CONF(ctx->filter))->agent->var_pfx,
(int)sz, str);
spoe_set_var(ctx, scope, str, sz, &smp);
ret = (p - *buf);
*buf = p;
return ret;
skip:
return 0;
}
static inline int
spoe_decode_action_unset_var(struct stream *s, struct spoe_context *ctx,
char **buf, char *end, int dir)
{
char *str, *scope, *p = *buf;
struct sample smp;
uint64_t sz;
int ret;
if (p + 2 >= end)
goto skip;
/* UNSET-VAR requires 2 arguments */
if (*p++ != 2)
goto skip;
switch (*p++) {
case SPOE_SCOPE_PROC: scope = "proc"; break;
case SPOE_SCOPE_SESS: scope = "sess"; break;
case SPOE_SCOPE_TXN : scope = "txn"; break;
case SPOE_SCOPE_REQ : scope = "req"; break;
case SPOE_SCOPE_RES : scope = "res"; break;
default: goto skip;
}
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
goto skip;
memset(&smp, 0, sizeof(smp));
smp_set_owner(&smp, s->be, s->sess, s, dir|SMP_OPT_FINAL);
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - unset-var '%s.%s.%.*s'\n",
(int)now.tv_sec, (int)now.tv_usec,
((struct spoe_config *)FLT_CONF(ctx->filter))->agent->id,
__FUNCTION__, s, scope,
((struct spoe_config *)FLT_CONF(ctx->filter))->agent->var_pfx,
(int)sz, str);
spoe_unset_var(ctx, scope, str, sz, &smp);
ret = (p - *buf);
*buf = p;
return ret;
skip:
return 0;
}
/* Process SPOE actions for a specific event. It returns 1 on success. If an
* error occurred, 0 is returned. */
static int
spoe_process_actions(struct stream *s, struct spoe_context *ctx,
enum spoe_event ev, int dir)
{
char *p, *end;
int ret;
p = ctx->buffer->p;
end = p + ctx->buffer->i;
while (p < end) {
enum spoe_action_type type;
type = *p++;
switch (type) {
case SPOE_ACT_T_SET_VAR:
ret = spoe_decode_action_set_var(s, ctx, &p, end, dir);
if (!ret)
goto skip;
break;
case SPOE_ACT_T_UNSET_VAR:
ret = spoe_decode_action_unset_var(s, ctx, &p, end, dir);
if (!ret)
goto skip;
break;
default:
goto skip;
}
}
return 1;
skip:
return 0;
}
/***************************************************************************
* Functions that process SPOE events
**************************************************************************/
static inline int
spoe_start_event_processing(struct spoe_context *ctx, int dir)
{
/* If a process is already started for this SPOE context, retry
* later. */
if (ctx->flags & SPOE_CTX_FL_PROCESS)
return 0;
/* Set the right flag to prevent request and response processing
* in same time. */
ctx->flags |= ((dir == SMP_OPT_DIR_REQ)
? SPOE_CTX_FL_REQ_PROCESS
: SPOE_CTX_FL_RSP_PROCESS);
return 1;
}
static inline void
spoe_stop_event_processing(struct spoe_context *ctx)
{
struct spoe_appctx *sa = ctx->frag_ctx.spoe_appctx;
if (sa) {
sa->frag_ctx.ctx = NULL;
spoe_wakeup_appctx(sa->owner);
}
/* Reset the flag to allow next processing */
ctx->flags &= ~(SPOE_CTX_FL_PROCESS|SPOE_CTX_FL_FRAGMENTED);
ctx->status_code = 0;
/* Reset processing timer */
ctx->process_exp = TICK_ETERNITY;
spoe_release_buffer(&ctx->buffer, &ctx->buffer_wait);
ctx->frag_ctx.spoe_appctx = NULL;
ctx->frag_ctx.curmsg = NULL;
ctx->frag_ctx.curarg = NULL;
ctx->frag_ctx.curoff = 0;
ctx->frag_ctx.flags = 0;
if (!LIST_ISEMPTY(&ctx->list)) {
LIST_DEL(&ctx->list);
LIST_INIT(&ctx->list);
}
}
/* Process a SPOE event. First, this functions will process messages attached to
* this event and send them to an agent in a NOTIFY frame. Then, it will wait a
* ACK frame to process corresponding actions. During all the processing, it
* returns 0 and it returns 1 when the processing is finished. If an error
* occurred, -1 is returned. */
static int
spoe_process_event(struct stream *s, struct spoe_context *ctx,
enum spoe_event ev)
{
struct spoe_config *conf = FLT_CONF(ctx->filter);
struct spoe_agent *agent = conf->agent;
int dir, ret = 1;
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - ctx-state=%s - event=%s\n",
(int)now.tv_sec, (int)now.tv_usec,
agent->id, __FUNCTION__, s, spoe_ctx_state_str[ctx->state],
spoe_event_str[ev]);
dir = ((ev < SPOE_EV_ON_SERVER_SESS) ? SMP_OPT_DIR_REQ : SMP_OPT_DIR_RES);
if (LIST_ISEMPTY(&(ctx->messages[ev])))
goto out;
if (ctx->state == SPOE_CTX_ST_ERROR)
goto error;
if (tick_is_expired(ctx->process_exp, now_ms) && ctx->state != SPOE_CTX_ST_DONE) {
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - failed to process event '%s': timeout\n",
(int)now.tv_sec, (int)now.tv_usec,
agent->id, __FUNCTION__, s, spoe_event_str[ev]);
ctx->status_code = SPOE_CTX_ERR_TOUT;
goto error;
}
if (ctx->state == SPOE_CTX_ST_READY) {
if (agent->eps_max > 0) {
if (!freq_ctr_remain(&agent->err_per_sec, agent->eps_max, 0)) {
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - skip event '%s': max EPS reached\n",
(int)now.tv_sec, (int)now.tv_usec,
agent->id, __FUNCTION__, s, spoe_event_str[ev]);
goto skip;
}
}
if (!tick_isset(ctx->process_exp)) {
ctx->process_exp = tick_add_ifset(now_ms, agent->timeout.processing);
s->task->expire = tick_first((tick_is_expired(s->task->expire, now_ms) ? 0 : s->task->expire),
ctx->process_exp);
}
ret = spoe_start_event_processing(ctx, dir);
if (!ret)
goto out;
if (spoe_queue_context(ctx) < 0)
goto error;
ctx->state = SPOE_CTX_ST_ENCODING_MSGS;
/* fall through */
}
if (ctx->state == SPOE_CTX_ST_ENCODING_MSGS) {
if (!spoe_acquire_buffer(&ctx->buffer, &ctx->buffer_wait))
goto out;
ret = spoe_encode_messages(s, ctx, &(ctx->messages[ev]), dir);
if (ret < 0)
goto error;
ctx->state = SPOE_CTX_ST_SENDING_MSGS;
}
if (ctx->state == SPOE_CTX_ST_SENDING_MSGS) {
if (ctx->frag_ctx.spoe_appctx)
spoe_wakeup_appctx(ctx->frag_ctx.spoe_appctx->owner);
ret = 0;
goto out;
}
if (ctx->state == SPOE_CTX_ST_WAITING_ACK) {
ret = 0;
goto out;
}
if (ctx->state == SPOE_CTX_ST_DONE) {
spoe_process_actions(s, ctx, ev, dir);
ret = 1;
ctx->frame_id++;
ctx->state = SPOE_CTX_ST_READY;
goto end;
}
out:
return ret;
error:
if (agent->eps_max > 0)
update_freq_ctr(&agent->err_per_sec, 1);
if (agent->var_on_error) {
struct sample smp;
memset(&smp, 0, sizeof(smp));
smp_set_owner(&smp, s->be, s->sess, s, dir|SMP_OPT_FINAL);
smp.data.u.sint = ctx->status_code;
smp.data.type = SMP_T_BOOL;
spoe_set_var(ctx, "txn", agent->var_on_error,
strlen(agent->var_on_error), &smp);
}
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - failed to create process event '%s': code=%u\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, ctx->strm, spoe_event_str[ev],
ctx->status_code);
send_log(ctx->strm->be, LOG_WARNING,
"SPOE: [%s] failed to process event '%s': code=%u\n",
agent->id, spoe_event_str[ev], ctx->status_code);
ctx->state = ((agent->flags & SPOE_FL_CONT_ON_ERR)
? SPOE_CTX_ST_READY
: SPOE_CTX_ST_NONE);
ret = 1;
goto end;
skip:
ctx->state = SPOE_CTX_ST_READY;
ret = 1;
end:
spoe_stop_event_processing(ctx);
return ret;
}
/***************************************************************************
* Functions that create/destroy SPOE contexts
**************************************************************************/
static int
spoe_acquire_buffer(struct buffer **buf, struct buffer_wait *buffer_wait)
{
if (*buf != &buf_empty)
return 1;
if (!LIST_ISEMPTY(&buffer_wait->list)) {
LIST_DEL(&buffer_wait->list);
LIST_INIT(&buffer_wait->list);
}
if (b_alloc_margin(buf, global.tune.reserved_bufs))
return 1;
LIST_ADDQ(&buffer_wq, &buffer_wait->list);
return 0;
}
static void
spoe_release_buffer(struct buffer **buf, struct buffer_wait *buffer_wait)
{
if (!LIST_ISEMPTY(&buffer_wait->list)) {
LIST_DEL(&buffer_wait->list);
LIST_INIT(&buffer_wait->list);
}
/* Release the buffer if needed */
if (*buf != &buf_empty) {
b_free(buf);
offer_buffers(buffer_wait->target,
tasks_run_queue + applets_active_queue);
}
}
static int
spoe_wakeup_context(struct spoe_context *ctx)
{
task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
return 1;
}
static struct spoe_context *
spoe_create_context(struct filter *filter)
{
struct spoe_config *conf = FLT_CONF(filter);
struct spoe_context *ctx;
ctx = pool_alloc_dirty(pool2_spoe_ctx);
if (ctx == NULL) {
return NULL;
}
memset(ctx, 0, sizeof(*ctx));
ctx->filter = filter;
ctx->state = SPOE_CTX_ST_NONE;
ctx->status_code = SPOE_CTX_ERR_NONE;
ctx->flags = 0;
ctx->messages = conf->agent->messages;
ctx->buffer = &buf_empty;
LIST_INIT(&ctx->buffer_wait.list);
ctx->buffer_wait.target = ctx;
ctx->buffer_wait.wakeup_cb = (int (*)(void *))spoe_wakeup_context;
LIST_INIT(&ctx->list);
ctx->stream_id = 0;
ctx->frame_id = 1;
ctx->process_exp = TICK_ETERNITY;
return ctx;
}
static void
spoe_destroy_context(struct spoe_context *ctx)
{
if (!ctx)
return;
spoe_stop_event_processing(ctx);
pool_free2(pool2_spoe_ctx, ctx);
}
static void
spoe_reset_context(struct spoe_context *ctx)
{
ctx->state = SPOE_CTX_ST_READY;
ctx->flags &= ~(SPOE_CTX_FL_PROCESS|SPOE_CTX_FL_FRAGMENTED);
}
/***************************************************************************
* Hooks that manage the filter lifecycle (init/check/deinit)
**************************************************************************/
/* Signal handler: Do a soft stop, wakeup SPOE applet */
static void
spoe_sig_stop(struct sig_handler *sh)
{
struct proxy *p;
p = proxy;
while (p) {
struct flt_conf *fconf;
list_for_each_entry(fconf, &p->filter_configs, list) {
struct spoe_config *conf;
struct spoe_agent *agent;
struct spoe_appctx *spoe_appctx;
if (fconf->id != spoe_filter_id)
continue;
conf = fconf->conf;
agent = conf->agent;
list_for_each_entry(spoe_appctx, &agent->applets, list) {
spoe_wakeup_appctx(spoe_appctx->owner);
}
}
p = p->next;
}
}
/* Initialize the SPOE filter. Returns -1 on error, else 0. */
static int
spoe_init(struct proxy *px, struct flt_conf *fconf)
{
struct spoe_config *conf = fconf->conf;
memset(&conf->agent_fe, 0, sizeof(conf->agent_fe));
init_new_proxy(&conf->agent_fe);
conf->agent_fe.parent = conf->agent;
conf->agent_fe.last_change = now.tv_sec;
conf->agent_fe.id = conf->agent->id;
conf->agent_fe.cap = PR_CAP_FE;
conf->agent_fe.mode = PR_MODE_TCP;
conf->agent_fe.maxconn = 0;
conf->agent_fe.options2 |= PR_O2_INDEPSTR;
conf->agent_fe.conn_retries = CONN_RETRIES;
conf->agent_fe.accept = frontend_accept;
conf->agent_fe.srv = NULL;
conf->agent_fe.timeout.client = TICK_ETERNITY;
conf->agent_fe.default_target = &spoe_applet.obj_type;
conf->agent_fe.fe_req_ana = AN_REQ_SWITCHING_RULES;
if (!sighandler_registered) {
signal_register_fct(0, spoe_sig_stop, 0);
sighandler_registered = 1;
}
return 0;
}
/* Free ressources allocated by the SPOE filter. */
static void
spoe_deinit(struct proxy *px, struct flt_conf *fconf)
{
struct spoe_config *conf = fconf->conf;
if (conf) {
struct spoe_agent *agent = conf->agent;
spoe_release_agent(agent);
free(conf);
}
fconf->conf = NULL;
}
/* Check configuration of a SPOE filter for a specified proxy.
* Return 1 on error, else 0. */
static int
spoe_check(struct proxy *px, struct flt_conf *fconf)
{
struct spoe_config *conf = fconf->conf;
struct proxy *target;
target = proxy_be_by_name(conf->agent->b.name);
if (target == NULL) {
Alert("Proxy %s : unknown backend '%s' used by SPOE agent '%s'"
" declared at %s:%d.\n",
px->id, conf->agent->b.name, conf->agent->id,
conf->agent->conf.file, conf->agent->conf.line);
return 1;
}
if (target->mode != PR_MODE_TCP) {
Alert("Proxy %s : backend '%s' used by SPOE agent '%s' declared"
" at %s:%d does not support HTTP mode.\n",
px->id, target->id, conf->agent->id,
conf->agent->conf.file, conf->agent->conf.line);
return 1;
}
free(conf->agent->b.name);
conf->agent->b.name = NULL;
conf->agent->b.be = target;
return 0;
}
/**************************************************************************
* Hooks attached to a stream
*************************************************************************/
/* Called when a filter instance is created and attach to a stream. It creates
* the context that will be used to process this stream. */
static int
spoe_start(struct stream *s, struct filter *filter)
{
struct spoe_config *conf = FLT_CONF(filter);
struct spoe_agent *agent = conf->agent;
struct spoe_context *ctx;
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, s);
ctx = spoe_create_context(filter);
if (ctx == NULL) {
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p"
" - failed to create SPOE context\n",
(int)now.tv_sec, (int)now.tv_usec, agent->id,
__FUNCTION__, ctx->strm);
send_log(s->be, LOG_EMERG,
"SPOE: [%s] failed to create SPOE context\n",
agent->id);
return 0;
}
ctx->strm = s;
ctx->state = SPOE_CTX_ST_READY;
filter->ctx = ctx;
if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_TCP_REQ_FE]))
filter->pre_analyzers |= AN_REQ_INSPECT_FE;
if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_TCP_REQ_BE]))
filter->pre_analyzers |= AN_REQ_INSPECT_BE;
if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_TCP_RSP]))
filter->pre_analyzers |= AN_RES_INSPECT;
if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_HTTP_REQ_FE]))
filter->pre_analyzers |= AN_REQ_HTTP_PROCESS_FE;
if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_HTTP_REQ_BE]))
filter->pre_analyzers |= AN_REQ_HTTP_PROCESS_BE;
if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_HTTP_RSP]))
filter->pre_analyzers |= AN_RES_HTTP_PROCESS_FE;
return 1;
}
/* Called when a filter instance is detached from a stream. It release the
* attached SPOE context. */
static void
spoe_stop(struct stream *s, struct filter *filter)
{
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p\n",
(int)now.tv_sec, (int)now.tv_usec,
((struct spoe_config *)FLT_CONF(filter))->agent->id,
__FUNCTION__, s);
spoe_destroy_context(filter->ctx);
}
/*
* Called when the stream is woken up because of expired timer.
*/
static void
spoe_check_timeouts(struct stream *s, struct filter *filter)
{
struct spoe_context *ctx = filter->ctx;
if (tick_is_expired(ctx->process_exp, now_ms)) {
s->pending_events |= TASK_WOKEN_MSG;
spoe_release_buffer(&ctx->buffer, &ctx->buffer_wait);
}
}
/* Called when we are ready to filter data on a channel */
static int
spoe_start_analyze(struct stream *s, struct filter *filter, struct channel *chn)
{
struct spoe_context *ctx = filter->ctx;
int ret = 1;
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p - ctx-state=%s"
" - ctx-flags=0x%08x\n",
(int)now.tv_sec, (int)now.tv_usec,
((struct spoe_config *)FLT_CONF(filter))->agent->id,
__FUNCTION__, s, spoe_ctx_state_str[ctx->state], ctx->flags);
if (ctx->state == SPOE_CTX_ST_NONE)
goto out;
if (!(chn->flags & CF_ISRESP)) {
if (filter->pre_analyzers & AN_REQ_INSPECT_FE)
chn->analysers |= AN_REQ_INSPECT_FE;
if (filter->pre_analyzers & AN_REQ_INSPECT_BE)
chn->analysers |= AN_REQ_INSPECT_BE;
if (ctx->flags & SPOE_CTX_FL_CLI_CONNECTED)
goto out;
ctx->stream_id = s->uniq_id;
ret = spoe_process_event(s, ctx, SPOE_EV_ON_CLIENT_SESS);
if (!ret)
goto out;
ctx->flags |= SPOE_CTX_FL_CLI_CONNECTED;
}
else {
if (filter->pre_analyzers & SPOE_EV_ON_TCP_RSP)
chn->analysers |= AN_RES_INSPECT;
if (ctx->flags & SPOE_CTX_FL_SRV_CONNECTED)
goto out;
ret = spoe_process_event(s, ctx, SPOE_EV_ON_SERVER_SESS);
if (!ret) {
channel_dont_read(chn);
channel_dont_close(chn);
goto out;
}
ctx->flags |= SPOE_CTX_FL_SRV_CONNECTED;
}
out:
return ret;
}
/* Called before a processing happens on a given channel */
static int
spoe_chn_pre_analyze(struct stream *s, struct filter *filter,
struct channel *chn, unsigned an_bit)
{
struct spoe_context *ctx = filter->ctx;
int ret = 1;
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p - ctx-state=%s"
" - ctx-flags=0x%08x - ana=0x%08x\n",
(int)now.tv_sec, (int)now.tv_usec,
((struct spoe_config *)FLT_CONF(filter))->agent->id,
__FUNCTION__, s, spoe_ctx_state_str[ctx->state],
ctx->flags, an_bit);
if (ctx->state == SPOE_CTX_ST_NONE)
goto out;
switch (an_bit) {
case AN_REQ_INSPECT_FE:
ret = spoe_process_event(s, ctx, SPOE_EV_ON_TCP_REQ_FE);
break;
case AN_REQ_INSPECT_BE:
ret = spoe_process_event(s, ctx, SPOE_EV_ON_TCP_REQ_BE);
break;
case AN_RES_INSPECT:
ret = spoe_process_event(s, ctx, SPOE_EV_ON_TCP_RSP);
break;
case AN_REQ_HTTP_PROCESS_FE:
ret = spoe_process_event(s, ctx, SPOE_EV_ON_HTTP_REQ_FE);
break;
case AN_REQ_HTTP_PROCESS_BE:
ret = spoe_process_event(s, ctx, SPOE_EV_ON_HTTP_REQ_BE);
break;
case AN_RES_HTTP_PROCESS_FE:
ret = spoe_process_event(s, ctx, SPOE_EV_ON_HTTP_RSP);
break;
}
out:
if (!ret) {
channel_dont_read(chn);
channel_dont_close(chn);
}
return ret;
}
/* Called when the filtering on the channel ends. */
static int
spoe_end_analyze(struct stream *s, struct filter *filter, struct channel *chn)
{
struct spoe_context *ctx = filter->ctx;
SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p - ctx-state=%s"
" - ctx-flags=0x%08x\n",
(int)now.tv_sec, (int)now.tv_usec,
((struct spoe_config *)FLT_CONF(filter))->agent->id,
__FUNCTION__, s, spoe_ctx_state_str[ctx->state], ctx->flags);
if (!(ctx->flags & SPOE_CTX_FL_PROCESS)) {
spoe_reset_context(ctx);
}
return 1;
}
/********************************************************************
* Functions that manage the filter initialization
********************************************************************/
struct flt_ops spoe_ops = {
/* Manage SPOE filter, called for each filter declaration */
.init = spoe_init,
.deinit = spoe_deinit,
.check = spoe_check,
/* Handle start/stop of SPOE */
.attach = spoe_start,
.detach = spoe_stop,
.check_timeouts = spoe_check_timeouts,
/* Handle channels activity */
.channel_start_analyze = spoe_start_analyze,
.channel_pre_analyze = spoe_chn_pre_analyze,
.channel_end_analyze = spoe_end_analyze,
};
static int
cfg_parse_spoe_agent(const char *file, int linenum, char **args, int kwm)
{
const char *err;
int i, err_code = 0;
if ((cfg_scope == NULL && curengine != NULL) ||
(cfg_scope != NULL && curengine == NULL) ||
strcmp(curengine, cfg_scope))
goto out;
if (!strcmp(args[0], "spoe-agent")) { /* new spoe-agent section */
if (!*args[1]) {
Alert("parsing [%s:%d] : missing name for spoe-agent section.\n",
file, linenum);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code)) {
err_code |= ERR_ABORT;
goto out;
}
err = invalid_char(args[1]);
if (err) {
Alert("parsing [%s:%d] : character '%c' is not permitted in '%s' name '%s'.\n",
file, linenum, *err, args[0], args[1]);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
if (curagent != NULL) {
Alert("parsing [%s:%d] : another spoe-agent section previously defined.\n",
file, linenum);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
if ((curagent = calloc(1, sizeof(*curagent))) == NULL) {
Alert("parsing [%s:%d] : out of memory.\n", file, linenum);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
curagent->id = strdup(args[1]);
curagent->conf.file = strdup(file);
curagent->conf.line = linenum;
curagent->timeout.hello = TICK_ETERNITY;
curagent->timeout.idle = TICK_ETERNITY;
curagent->timeout.processing = TICK_ETERNITY;
curagent->engine_id = NULL;
curagent->var_pfx = NULL;
curagent->var_on_error = NULL;
curagent->flags = (SPOE_FL_PIPELINING | SPOE_FL_ASYNC | SPOE_FL_SND_FRAGMENTATION);
curagent->cps_max = 0;
curagent->eps_max = 0;
curagent->max_frame_size = MAX_FRAME_SIZE;
curagent->min_applets = 0;
curagent->max_fpa = 100;
for (i = 0; i < SPOE_EV_EVENTS; ++i)
LIST_INIT(&curagent->messages[i]);
curagent->frame_size = curagent->max_frame_size;
curagent->applets_act = 0;
curagent->applets_idle = 0;
curagent->sending_rate = 0;
LIST_INIT(&curagent->applets);
LIST_INIT(&curagent->sending_queue);
LIST_INIT(&curagent->waiting_queue);
}
else if (!strcmp(args[0], "use-backend")) {
if (!*args[1]) {
Alert("parsing [%s:%d] : '%s' expects a backend name.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
free(curagent->b.name);
curagent->b.name = strdup(args[1]);
}
else if (!strcmp(args[0], "messages")) {
int cur_arg = 1;
while (*args[cur_arg]) {
struct spoe_msg_placeholder *mp = NULL;
list_for_each_entry(mp, &curmps, list) {
if (!strcmp(mp->id, args[cur_arg])) {
Alert("parsing [%s:%d]: spoe-message message '%s' already declared.\n",
file, linenum, args[cur_arg]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
if ((mp = calloc(1, sizeof(*mp))) == NULL) {
Alert("parsing [%s:%d] : out of memory.\n", file, linenum);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
mp->id = strdup(args[cur_arg]);
LIST_ADDQ(&curmps, &mp->list);
cur_arg++;
}
}
else if (!strcmp(args[0], "timeout")) {
unsigned int *tv = NULL;
const char *res;
unsigned timeout;
if (!*args[1]) {
Alert("parsing [%s:%d] : 'timeout' expects 'hello', 'idle' and 'processing'.\n",
file, linenum);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(2, file, linenum, args, &err_code))
goto out;
if (!strcmp(args[1], "hello"))
tv = &curagent->timeout.hello;
else if (!strcmp(args[1], "idle"))
tv = &curagent->timeout.idle;
else if (!strcmp(args[1], "processing"))
tv = &curagent->timeout.processing;
else {
Alert("parsing [%s:%d] : 'timeout' supports 'hello', 'idle' or 'processing' (got %s).\n",
file, linenum, args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (!*args[2]) {
Alert("parsing [%s:%d] : 'timeout %s' expects an integer value (in milliseconds).\n",
file, linenum, args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
res = parse_time_err(args[2], &timeout, TIME_UNIT_MS);
if (res) {
Alert("parsing [%s:%d] : unexpected character '%c' in 'timeout %s'.\n",
file, linenum, *res, args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
*tv = MS_TO_TICKS(timeout);
}
else if (!strcmp(args[0], "option")) {
if (!*args[1]) {
Alert("parsing [%s:%d]: '%s' expects an option name.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (!strcmp(args[1], "pipelining")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (kwm == 1)
curagent->flags &= ~SPOE_FL_PIPELINING;
else
curagent->flags |= SPOE_FL_PIPELINING;
goto out;
}
else if (!strcmp(args[1], "async")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (kwm == 1)
curagent->flags &= ~SPOE_FL_ASYNC;
else
curagent->flags |= SPOE_FL_ASYNC;
goto out;
}
else if (!strcmp(args[1], "send-frag-payload")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (kwm == 1)
curagent->flags &= ~SPOE_FL_SND_FRAGMENTATION;
else
curagent->flags |= SPOE_FL_SND_FRAGMENTATION;
goto out;
}
/* Following options does not support negation */
if (kwm == 1) {
Alert("parsing [%s:%d]: negation is not supported for option '%s'.\n",
file, linenum, args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (!strcmp(args[1], "var-prefix")) {
char *tmp;
if (!*args[2]) {
Alert("parsing [%s:%d]: '%s %s' expects a value.\n",
file, linenum, args[0],
args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(2, file, linenum, args, &err_code))
goto out;
tmp = args[2];
while (*tmp) {
if (!isalnum(*tmp) && *tmp != '_' && *tmp != '.') {
Alert("parsing [%s:%d]: '%s %s' only supports [a-zA-Z_-.] chars.\n",
file, linenum, args[0], args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
tmp++;
}
curagent->var_pfx = strdup(args[2]);
}
else if (!strcmp(args[1], "continue-on-error")) {
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
curagent->flags |= SPOE_FL_CONT_ON_ERR;
}
else if (!strcmp(args[1], "set-on-error")) {
char *tmp;
if (!*args[2]) {
Alert("parsing [%s:%d]: '%s %s' expects a value.\n",
file, linenum, args[0],
args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(2, file, linenum, args, &err_code))
goto out;
tmp = args[2];
while (*tmp) {
if (!isalnum(*tmp) && *tmp != '_' && *tmp != '.') {
Alert("parsing [%s:%d]: '%s %s' only supports [a-zA-Z_-.] chars.\n",
file, linenum, args[0], args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
tmp++;
}
curagent->var_on_error = strdup(args[2]);
}
else {
Alert("parsing [%s:%d]: option '%s' is not supported.\n",
file, linenum, args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!strcmp(args[0], "maxconnrate")) {
if (!*args[1]) {
Alert("parsing [%s:%d] : '%s' expects an integer argument.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
curagent->cps_max = atol(args[1]);
}
else if (!strcmp(args[0], "maxerrrate")) {
if (!*args[1]) {
Alert("parsing [%s:%d] : '%s' expects an integer argument.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
curagent->eps_max = atol(args[1]);
}
else if (!strcmp(args[0], "max-frame-size")) {
if (!*args[1]) {
Alert("parsing [%s:%d] : '%s' expects an integer argument.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
curagent->max_frame_size = atol(args[1]);
if (curagent->max_frame_size < MIN_FRAME_SIZE ||
curagent->max_frame_size > MAX_FRAME_SIZE) {
Alert("parsing [%s:%d] : '%s' expects a positive integer argument in the range [%d, %d].\n",
file, linenum, args[0], MIN_FRAME_SIZE, MAX_FRAME_SIZE);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (*args[0]) {
Alert("parsing [%s:%d] : unknown keyword '%s' in spoe-agent section.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
out:
return err_code;
}
static int
cfg_parse_spoe_message(const char *file, int linenum, char **args, int kwm)
{
struct spoe_message *msg;
struct spoe_arg *arg;
const char *err;
char *errmsg = NULL;
int err_code = 0;
if ((cfg_scope == NULL && curengine != NULL) ||
(cfg_scope != NULL && curengine == NULL) ||
strcmp(curengine, cfg_scope))
goto out;
if (!strcmp(args[0], "spoe-message")) { /* new spoe-message section */
if (!*args[1]) {
Alert("parsing [%s:%d] : missing name for spoe-message section.\n",
file, linenum);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code)) {
err_code |= ERR_ABORT;
goto out;
}
err = invalid_char(args[1]);
if (err) {
Alert("parsing [%s:%d] : character '%c' is not permitted in '%s' name '%s'.\n",
file, linenum, *err, args[0], args[1]);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
list_for_each_entry(msg, &curmsgs, list) {
if (!strcmp(msg->id, args[1])) {
Alert("parsing [%s:%d]: spoe-message section '%s' has the same"
" name as another one declared at %s:%d.\n",
file, linenum, args[1], msg->conf.file, msg->conf.line);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
if ((curmsg = calloc(1, sizeof(*curmsg))) == NULL) {
Alert("parsing [%s:%d] : out of memory.\n", file, linenum);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
curmsg->id = strdup(args[1]);
curmsg->id_len = strlen(curmsg->id);
curmsg->event = SPOE_EV_NONE;
curmsg->conf.file = strdup(file);
curmsg->conf.line = linenum;
curmsg->nargs = 0;
LIST_INIT(&curmsg->args);
LIST_ADDQ(&curmsgs, &curmsg->list);
}
else if (!strcmp(args[0], "args")) {
int cur_arg = 1;
curproxy->conf.args.ctx = ARGC_SPOE;
curproxy->conf.args.file = file;
curproxy->conf.args.line = linenum;
while (*args[cur_arg]) {
char *delim = strchr(args[cur_arg], '=');
int idx = 0;
if ((arg = calloc(1, sizeof(*arg))) == NULL) {
Alert("parsing [%s:%d] : out of memory.\n", file, linenum);
err_code |= ERR_ALERT | ERR_ABORT;
goto out;
}
if (!delim) {
arg->name = NULL;
arg->name_len = 0;
delim = args[cur_arg];
}
else {
arg->name = my_strndup(args[cur_arg], delim - args[cur_arg]);
arg->name_len = delim - args[cur_arg];
delim++;
}
arg->expr = sample_parse_expr((char*[]){delim, NULL},
&idx, file, linenum, &errmsg,
&curproxy->conf.args);
if (arg->expr == NULL) {
Alert("parsing [%s:%d] : '%s': %s.\n", file, linenum, args[0], errmsg);
err_code |= ERR_ALERT | ERR_FATAL;
free(arg->name);
free(arg);
goto out;
}
curmsg->nargs++;
LIST_ADDQ(&curmsg->args, &arg->list);
cur_arg++;
}
curproxy->conf.args.file = NULL;
curproxy->conf.args.line = 0;
}
else if (!strcmp(args[0], "event")) {
if (!*args[1]) {
Alert("parsing [%s:%d] : missing event name.\n", file, linenum);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;
if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_CLIENT_SESS]))
curmsg->event = SPOE_EV_ON_CLIENT_SESS;
else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_SERVER_SESS]))
curmsg->event = SPOE_EV_ON_SERVER_SESS;
else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_TCP_REQ_FE]))
curmsg->event = SPOE_EV_ON_TCP_REQ_FE;
else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_TCP_REQ_BE]))
curmsg->event = SPOE_EV_ON_TCP_REQ_BE;
else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_TCP_RSP]))
curmsg->event = SPOE_EV_ON_TCP_RSP;
else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_HTTP_REQ_FE]))
curmsg->event = SPOE_EV_ON_HTTP_REQ_FE;
else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_HTTP_REQ_BE]))
curmsg->event = SPOE_EV_ON_HTTP_REQ_BE;
else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_HTTP_RSP]))
curmsg->event = SPOE_EV_ON_HTTP_RSP;
else {
Alert("parsing [%s:%d] : unkown event '%s'.\n",
file, linenum, args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
}
else if (!*args[0]) {
Alert("parsing [%s:%d] : unknown keyword '%s' in spoe-message section.\n",
file, linenum, args[0]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;
}
out:
free(errmsg);
return err_code;
}
/* Return -1 on error, else 0 */
static int
parse_spoe_flt(char **args, int *cur_arg, struct proxy *px,
struct flt_conf *fconf, char **err, void *private)
{
struct list backup_sections;
struct spoe_config *conf;
struct spoe_message *msg, *msgback;
struct spoe_msg_placeholder *mp, *mpback;
char *file = NULL, *engine = NULL;
int ret, pos = *cur_arg + 1;
conf = calloc(1, sizeof(*conf));
if (conf == NULL) {
memprintf(err, "%s: out of memory", args[*cur_arg]);
goto error;
}
conf->proxy = px;
while (*args[pos]) {
if (!strcmp(args[pos], "config")) {
if (!*args[pos+1]) {
memprintf(err, "'%s' : '%s' option without value",
args[*cur_arg], args[pos]);
goto error;
}
file = args[pos+1];
pos += 2;
}
else if (!strcmp(args[pos], "engine")) {
if (!*args[pos+1]) {
memprintf(err, "'%s' : '%s' option without value",
args[*cur_arg], args[pos]);
goto error;
}
engine = args[pos+1];
pos += 2;
}
else {
memprintf(err, "unknown keyword '%s'", args[pos]);
goto error;
}
}
if (file == NULL) {
memprintf(err, "'%s' : missing config file", args[*cur_arg]);
goto error;
}
/* backup sections and register SPOE sections */
LIST_INIT(&backup_sections);
cfg_backup_sections(&backup_sections);
cfg_register_section("spoe-agent", cfg_parse_spoe_agent);
cfg_register_section("spoe-message", cfg_parse_spoe_message);
/* Parse SPOE filter configuration file */
curengine = engine;
curproxy = px;
curagent = NULL;
curmsg = NULL;
ret = readcfgfile(file);
curproxy = NULL;
/* unregister SPOE sections and restore previous sections */
cfg_unregister_sections();
cfg_restore_sections(&backup_sections);
if (ret == -1) {
memprintf(err, "Could not open configuration file %s : %s",
file, strerror(errno));
goto error;
}
if (ret & (ERR_ABORT|ERR_FATAL)) {
memprintf(err, "Error(s) found in configuration file %s", file);
goto error;
}
/* Check SPOE agent */
if (curagent == NULL) {
memprintf(err, "No SPOE agent found in file %s", file);
goto error;
}
if (curagent->b.name == NULL) {
memprintf(err, "No backend declared for SPOE agent '%s' declared at %s:%d",
curagent->id, curagent->conf.file, curagent->conf.line);
goto error;
}
if (curagent->timeout.hello == TICK_ETERNITY ||
curagent->timeout.idle == TICK_ETERNITY ||
curagent->timeout.processing == TICK_ETERNITY) {
Warning("Proxy '%s': missing timeouts for SPOE agent '%s' declare at %s:%d.\n"
" | While not properly invalid, you will certainly encounter various problems\n"
" | with such a configuration. To fix this, please ensure that all following\n"
" | timeouts are set to a non-zero value: 'hello', 'idle', 'processing'.\n",
px->id, curagent->id, curagent->conf.file, curagent->conf.line);
}
if (curagent->var_pfx == NULL) {
char *tmp = curagent->id;
while (*tmp) {
if (!isalnum(*tmp) && *tmp != '_' && *tmp != '.') {
memprintf(err, "Invalid variable prefix '%s' for SPOE agent '%s' declared at %s:%d. "
"Use 'option var-prefix' to set it. Only [a-zA-Z0-9_.] chars are supported.\n",
curagent->id, curagent->id, curagent->conf.file, curagent->conf.line);
goto error;
}
tmp++;
}
curagent->var_pfx = strdup(curagent->id);
}
if (curagent->engine_id == NULL)
curagent->engine_id = generate_pseudo_uuid();
if (LIST_ISEMPTY(&curmps)) {
Warning("Proxy '%s': No message used by SPOE agent '%s' declared at %s:%d.\n",
px->id, curagent->id, curagent->conf.file, curagent->conf.line);
goto finish;
}
list_for_each_entry_safe(mp, mpback, &curmps, list) {
list_for_each_entry_safe(msg, msgback, &curmsgs, list) {
struct spoe_arg *arg;
unsigned int where;
if (!strcmp(msg->id, mp->id)) {
if ((px->cap & (PR_CAP_FE|PR_CAP_BE)) == (PR_CAP_FE|PR_CAP_BE)) {
if (msg->event == SPOE_EV_ON_TCP_REQ_BE)
msg->event = SPOE_EV_ON_TCP_REQ_FE;
if (msg->event == SPOE_EV_ON_HTTP_REQ_BE)
msg->event = SPOE_EV_ON_HTTP_REQ_FE;
}
if (!(px->cap & PR_CAP_FE) && (msg->event == SPOE_EV_ON_CLIENT_SESS ||
msg->event == SPOE_EV_ON_TCP_REQ_FE ||
msg->event == SPOE_EV_ON_HTTP_REQ_FE)) {
Warning("Proxy '%s': frontend event used on a backend proxy at %s:%d.\n",
px->id, msg->conf.file, msg->conf.line);
goto next;
}
if (msg->event == SPOE_EV_NONE) {
Warning("Proxy '%s': Ignore SPOE message without event at %s:%d.\n",
px->id, msg->conf.file, msg->conf.line);
goto next;
}
where = 0;
switch (msg->event) {
case SPOE_EV_ON_CLIENT_SESS:
where |= SMP_VAL_FE_CON_ACC;
break;
case SPOE_EV_ON_TCP_REQ_FE:
where |= SMP_VAL_FE_REQ_CNT;
break;
case SPOE_EV_ON_HTTP_REQ_FE:
where |= SMP_VAL_FE_HRQ_HDR;
break;
case SPOE_EV_ON_TCP_REQ_BE:
if (px->cap & PR_CAP_FE)
where |= SMP_VAL_FE_REQ_CNT;
if (px->cap & PR_CAP_BE)
where |= SMP_VAL_BE_REQ_CNT;
break;
case SPOE_EV_ON_HTTP_REQ_BE:
if (px->cap & PR_CAP_FE)
where |= SMP_VAL_FE_HRQ_HDR;
if (px->cap & PR_CAP_BE)
where |= SMP_VAL_BE_HRQ_HDR;
break;
case SPOE_EV_ON_SERVER_SESS:
where |= SMP_VAL_BE_SRV_CON;
break;
case SPOE_EV_ON_TCP_RSP:
if (px->cap & PR_CAP_FE)
where |= SMP_VAL_FE_RES_CNT;
if (px->cap & PR_CAP_BE)
where |= SMP_VAL_BE_RES_CNT;
break;
case SPOE_EV_ON_HTTP_RSP:
if (px->cap & PR_CAP_FE)
where |= SMP_VAL_FE_HRS_HDR;
if (px->cap & PR_CAP_BE)
where |= SMP_VAL_BE_HRS_HDR;
break;
default:
break;
}
list_for_each_entry(arg, &msg->args, list) {
if (!(arg->expr->fetch->val & where)) {
Warning("Proxy '%s': Ignore SPOE message at %s:%d: "
"some args extract information from '%s', "
"none of which is available here ('%s').\n",
px->id, msg->conf.file, msg->conf.line,
sample_ckp_names(arg->expr->fetch->use),
sample_ckp_names(where));
goto next;
}
}
msg->agent = curagent;
LIST_DEL(&msg->list);
LIST_ADDQ(&curagent->messages[msg->event], &msg->list);
goto next;
}
}
memprintf(err, "SPOE agent '%s' try to use undefined SPOE message '%s' at %s:%d",
curagent->id, mp->id, curagent->conf.file, curagent->conf.line);
goto error;
next:
continue;
}
finish:
conf->agent = curagent;
list_for_each_entry_safe(mp, mpback, &curmps, list) {
LIST_DEL(&mp->list);
spoe_release_msg_placeholder(mp);
}
list_for_each_entry_safe(msg, msgback, &curmsgs, list) {
Warning("Proxy '%s': Ignore unused SPOE messages '%s' declared at %s:%d.\n",
px->id, msg->id, msg->conf.file, msg->conf.line);
LIST_DEL(&msg->list);
spoe_release_message(msg);
}
*cur_arg = pos;
fconf->id = spoe_filter_id;
fconf->ops = &spoe_ops;
fconf->conf = conf;
return 0;
error:
spoe_release_agent(curagent);
list_for_each_entry_safe(mp, mpback, &curmps, list) {
LIST_DEL(&mp->list);
spoe_release_msg_placeholder(mp);
}
list_for_each_entry_safe(msg, msgback, &curmsgs, list) {
LIST_DEL(&msg->list);
spoe_release_message(msg);
}
free(conf);
return -1;
}
/* Declare the filter parser for "spoe" keyword */
static struct flt_kw_list flt_kws = { "SPOE", { }, {
{ "spoe", parse_spoe_flt, NULL },
{ NULL, NULL, NULL },
}
};
__attribute__((constructor))
static void __spoe_init(void)
{
flt_register_keywords(&flt_kws);
LIST_INIT(&curmsgs);
LIST_INIT(&curmps);
pool2_spoe_ctx = create_pool("spoe_ctx", sizeof(struct spoe_context), MEM_F_SHARED);
pool2_spoe_appctx = create_pool("spoe_appctx", sizeof(struct spoe_appctx), MEM_F_SHARED);
}
__attribute__((destructor))
static void
__spoe_deinit(void)
{
pool_destroy2(pool2_spoe_ctx);
pool_destroy2(pool2_spoe_appctx);
}