blob: 3142e78680a942bd5a5fc04c2b572af0c587cd39 [file] [log] [blame]
/*
* Health-checks functions.
*
* Copyright 2000-2009,2020 Willy Tarreau <w@1wt.eu>
* Copyright 2007-2010 Krzysztof Piotr Oledzki <ole@ans.pl>
* Copyright 2013 Baptiste Assmann <bedis9@gmail.com>
* Copyright 2020 Gaetan Rivet <grive@u256.net>
* Copyright 2020 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 <sys/resource.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <haproxy/action.h>
#include <haproxy/api.h>
#include <haproxy/cfgparse.h>
#include <haproxy/check.h>
#include <haproxy/chunk.h>
#include <haproxy/connection.h>
#include <haproxy/errors.h>
#include <haproxy/global.h>
#include <haproxy/h1.h>
#include <haproxy/http.h>
#include <haproxy/http_htx.h>
#include <haproxy/htx.h>
#include <haproxy/istbuf.h>
#include <haproxy/list.h>
#include <haproxy/log.h>
#include <haproxy/protocol.h>
#include <haproxy/proxy-t.h>
#include <haproxy/regex.h>
#include <haproxy/sample.h>
#include <haproxy/server.h>
#include <haproxy/ssl_sock.h>
#include <haproxy/task.h>
#include <haproxy/tcpcheck.h>
#include <haproxy/time.h>
#include <haproxy/tools.h>
#include <haproxy/vars.h>
/* Global tree to share all tcp-checks */
struct eb_root shared_tcpchecks = EB_ROOT;
DECLARE_POOL(pool_head_tcpcheck_rule, "tcpcheck_rule", sizeof(struct tcpcheck_rule));
/**************************************************************************/
/*************** Init/deinit tcp-check rules and ruleset ******************/
/**************************************************************************/
/* Releases memory allocated for a log-format string */
static void free_tcpcheck_fmt(struct list *fmt)
{
struct logformat_node *lf, *lfb;
list_for_each_entry_safe(lf, lfb, fmt, list) {
LIST_DEL(&lf->list);
release_sample_expr(lf->expr);
free(lf->arg);
free(lf);
}
}
/* Releases memory allocated for an HTTP header used in a tcp-check send rule */
void free_tcpcheck_http_hdr(struct tcpcheck_http_hdr *hdr)
{
if (!hdr)
return;
free_tcpcheck_fmt(&hdr->value);
istfree(&hdr->name);
free(hdr);
}
/* Releases memory allocated for an HTTP header list used in a tcp-check send
* rule
*/
static void free_tcpcheck_http_hdrs(struct list *hdrs)
{
struct tcpcheck_http_hdr *hdr, *bhdr;
list_for_each_entry_safe(hdr, bhdr, hdrs, list) {
LIST_DEL(&hdr->list);
free_tcpcheck_http_hdr(hdr);
}
}
/* Releases memory allocated for a tcp-check. If in_pool is set, it means the
* tcp-check was allocated using a memory pool (it is used to instantiate email
* alerts).
*/
void free_tcpcheck(struct tcpcheck_rule *rule, int in_pool)
{
if (!rule)
return;
free(rule->comment);
switch (rule->action) {
case TCPCHK_ACT_SEND:
switch (rule->send.type) {
case TCPCHK_SEND_STRING:
case TCPCHK_SEND_BINARY:
istfree(&rule->send.data);
break;
case TCPCHK_SEND_STRING_LF:
case TCPCHK_SEND_BINARY_LF:
free_tcpcheck_fmt(&rule->send.fmt);
break;
case TCPCHK_SEND_HTTP:
free(rule->send.http.meth.str.area);
if (!(rule->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT))
istfree(&rule->send.http.uri);
else
free_tcpcheck_fmt(&rule->send.http.uri_fmt);
istfree(&rule->send.http.vsn);
free_tcpcheck_http_hdrs(&rule->send.http.hdrs);
if (!(rule->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT))
istfree(&rule->send.http.body);
else
free_tcpcheck_fmt(&rule->send.http.body_fmt);
break;
case TCPCHK_SEND_UNDEF:
break;
}
break;
case TCPCHK_ACT_EXPECT:
free_tcpcheck_fmt(&rule->expect.onerror_fmt);
free_tcpcheck_fmt(&rule->expect.onsuccess_fmt);
release_sample_expr(rule->expect.status_expr);
switch (rule->expect.type) {
case TCPCHK_EXPECT_HTTP_STATUS:
free(rule->expect.codes.codes);
break;
case TCPCHK_EXPECT_STRING:
case TCPCHK_EXPECT_BINARY:
case TCPCHK_EXPECT_HTTP_BODY:
istfree(&rule->expect.data);
break;
case TCPCHK_EXPECT_STRING_REGEX:
case TCPCHK_EXPECT_BINARY_REGEX:
case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
case TCPCHK_EXPECT_HTTP_BODY_REGEX:
regex_free(rule->expect.regex);
break;
case TCPCHK_EXPECT_STRING_LF:
case TCPCHK_EXPECT_BINARY_LF:
case TCPCHK_EXPECT_HTTP_BODY_LF:
free_tcpcheck_fmt(&rule->expect.fmt);
break;
case TCPCHK_EXPECT_HTTP_HEADER:
if (rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_REG)
regex_free(rule->expect.hdr.name_re);
else if (rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT)
free_tcpcheck_fmt(&rule->expect.hdr.name_fmt);
else
istfree(&rule->expect.hdr.name);
if (rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_REG)
regex_free(rule->expect.hdr.value_re);
else if (rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT)
free_tcpcheck_fmt(&rule->expect.hdr.value_fmt);
else if (!(rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_NONE))
istfree(&rule->expect.hdr.value);
break;
case TCPCHK_EXPECT_CUSTOM:
case TCPCHK_EXPECT_UNDEF:
break;
}
break;
case TCPCHK_ACT_CONNECT:
free(rule->connect.sni);
free(rule->connect.alpn);
release_sample_expr(rule->connect.port_expr);
break;
case TCPCHK_ACT_COMMENT:
break;
case TCPCHK_ACT_ACTION_KW:
free(rule->action_kw.rule);
break;
}
if (in_pool)
pool_free(pool_head_tcpcheck_rule, rule);
else
free(rule);
}
/* Creates a tcp-check variable used in preset variables before executing a
* tcp-check ruleset.
*/
struct tcpcheck_var *create_tcpcheck_var(const struct ist name)
{
struct tcpcheck_var *var = NULL;
var = calloc(1, sizeof(*var));
if (var == NULL)
return NULL;
var->name = istdup(name);
if (!isttest(var->name)) {
free(var);
return NULL;
}
LIST_INIT(&var->list);
return var;
}
/* Releases memory allocated for a preset tcp-check variable */
void free_tcpcheck_var(struct tcpcheck_var *var)
{
if (!var)
return;
istfree(&var->name);
if (var->data.type == SMP_T_STR || var->data.type == SMP_T_BIN)
free(var->data.u.str.area);
else if (var->data.type == SMP_T_METH && var->data.u.meth.meth == HTTP_METH_OTHER)
free(var->data.u.meth.str.area);
free(var);
}
/* Releases a list of preset tcp-check variables */
void free_tcpcheck_vars(struct list *vars)
{
struct tcpcheck_var *var, *back;
list_for_each_entry_safe(var, back, vars, list) {
LIST_DEL(&var->list);
free_tcpcheck_var(var);
}
}
/* Duplicate a list of preset tcp-check variables */
int dup_tcpcheck_vars(struct list *dst, struct list *src)
{
struct tcpcheck_var *var, *new = NULL;
list_for_each_entry(var, src, list) {
new = create_tcpcheck_var(var->name);
if (!new)
goto error;
new->data.type = var->data.type;
if (var->data.type == SMP_T_STR || var->data.type == SMP_T_BIN) {
if (chunk_dup(&new->data.u.str, &var->data.u.str) == NULL)
goto error;
if (var->data.type == SMP_T_STR)
new->data.u.str.area[new->data.u.str.data] = 0;
}
else if (var->data.type == SMP_T_METH && var->data.u.meth.meth == HTTP_METH_OTHER) {
if (chunk_dup(&new->data.u.str, &var->data.u.str) == NULL)
goto error;
new->data.u.str.area[new->data.u.str.data] = 0;
new->data.u.meth.meth = var->data.u.meth.meth;
}
else
new->data.u = var->data.u;
LIST_ADDQ(dst, &new->list);
}
return 1;
error:
free(new);
return 0;
}
/* Looks for a shared tcp-check ruleset given its name. */
struct tcpcheck_ruleset *find_tcpcheck_ruleset(const char *name)
{
struct tcpcheck_ruleset *rs;
struct ebpt_node *node;
node = ebis_lookup_len(&shared_tcpchecks, name, strlen(name));
if (node) {
rs = container_of(node, typeof(*rs), node);
return rs;
}
return NULL;
}
/* Creates a new shared tcp-check ruleset and insert it in shared_tcpchecks
* tree.
*/
struct tcpcheck_ruleset *create_tcpcheck_ruleset(const char *name)
{
struct tcpcheck_ruleset *rs;
rs = calloc(1, sizeof(*rs));
if (rs == NULL)
return NULL;
rs->node.key = strdup(name);
if (rs->node.key == NULL) {
free(rs);
return NULL;
}
LIST_INIT(&rs->rules);
ebis_insert(&shared_tcpchecks, &rs->node);
return rs;
}
/* Releases memory allocated by a tcp-check ruleset. */
void free_tcpcheck_ruleset(struct tcpcheck_ruleset *rs)
{
struct tcpcheck_rule *r, *rb;
if (!rs)
return;
ebpt_delete(&rs->node);
free(rs->node.key);
list_for_each_entry_safe(r, rb, &rs->rules, list) {
LIST_DEL(&r->list);
free_tcpcheck(r, 0);
}
free(rs);
}
/**************************************************************************/
/**************** Everything about tcp-checks execution *******************/
/**************************************************************************/
/* Returns the id of a step in a tcp-check ruleset */
int tcpcheck_get_step_id(struct check *check, struct tcpcheck_rule *rule)
{
if (!rule)
rule = check->current_step;
/* no last started step => first step */
if (!rule)
return 1;
/* last step is the first implicit connect */
if (rule->index == 0 &&
rule->action == TCPCHK_ACT_CONNECT &&
(rule->connect.options & TCPCHK_OPT_IMPLICIT))
return 0;
return rule->index + 1;
}
/* Returns the first non COMMENT/ACTION_KW tcp-check rule from list <list> or
* NULL if none was found.
*/
struct tcpcheck_rule *get_first_tcpcheck_rule(struct tcpcheck_rules *rules)
{
struct tcpcheck_rule *r;
list_for_each_entry(r, rules->list, list) {
if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW)
return r;
}
return NULL;
}
/* Returns the last non COMMENT/ACTION_KW tcp-check rule from list <list> or
* NULL if none was found.
*/
static struct tcpcheck_rule *get_last_tcpcheck_rule(struct tcpcheck_rules *rules)
{
struct tcpcheck_rule *r;
list_for_each_entry_rev(r, rules->list, list) {
if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW)
return r;
}
return NULL;
}
/* Returns the non COMMENT/ACTION_KW tcp-check rule from list <list> following
* <start> or NULL if non was found. If <start> is NULL, it relies on
* get_first_tcpcheck_rule().
*/
static struct tcpcheck_rule *get_next_tcpcheck_rule(struct tcpcheck_rules *rules, struct tcpcheck_rule *start)
{
struct tcpcheck_rule *r;
if (!start)
return get_first_tcpcheck_rule(rules);
r = LIST_NEXT(&start->list, typeof(r), list);
list_for_each_entry_from(r, rules->list, list) {
if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW)
return r;
}
return NULL;
}
/* Creates info message when a tcp-check healthcheck fails on an expect rule */
static void tcpcheck_expect_onerror_message(struct buffer *msg, struct check *check, struct tcpcheck_rule *rule,
int match, struct ist info)
{
struct sample *smp;
/* Follows these step to produce the info message:
* 1. if info field is already provided, copy it
* 2. if the expect rule provides an onerror log-format string,
* use it to produce the message
* 3. the expect rule is part of a protocol check (http, redis, mysql...), do nothing
* 4. Otherwise produce the generic tcp-check info message
*/
if (istlen(info)) {
chunk_strncat(msg, istptr(info), istlen(info));
goto comment;
}
else if (!LIST_ISEMPTY(&rule->expect.onerror_fmt)) {
msg->data += sess_build_logline(check->sess, NULL, b_tail(msg), b_room(msg), &rule->expect.onerror_fmt);
goto comment;
}
if (check->type == PR_O2_TCPCHK_CHK &&
(check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) != TCPCHK_RULES_TCP_CHK)
goto comment;
chunk_strcat(msg, (match ? "TCPCHK matched unwanted content" : "TCPCHK did not match content"));
switch (rule->expect.type) {
case TCPCHK_EXPECT_HTTP_STATUS:
chunk_appendf(msg, "(status codes) at step %d", tcpcheck_get_step_id(check, rule));
break;
case TCPCHK_EXPECT_STRING:
case TCPCHK_EXPECT_HTTP_BODY:
chunk_appendf(msg, " '%.*s' at step %d", (unsigned int)istlen(rule->expect.data), istptr(rule->expect.data),
tcpcheck_get_step_id(check, rule));
break;
case TCPCHK_EXPECT_BINARY:
chunk_appendf(msg, " (binary) at step %d", tcpcheck_get_step_id(check, rule));
break;
case TCPCHK_EXPECT_STRING_REGEX:
case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
case TCPCHK_EXPECT_HTTP_BODY_REGEX:
chunk_appendf(msg, " (regex) at step %d", tcpcheck_get_step_id(check, rule));
break;
case TCPCHK_EXPECT_BINARY_REGEX:
chunk_appendf(msg, " (binary regex) at step %d", tcpcheck_get_step_id(check, rule));
break;
case TCPCHK_EXPECT_STRING_LF:
case TCPCHK_EXPECT_HTTP_BODY_LF:
chunk_appendf(msg, " (log-format string) at step %d", tcpcheck_get_step_id(check, rule));
break;
case TCPCHK_EXPECT_BINARY_LF:
chunk_appendf(msg, " (log-format binary) at step %d", tcpcheck_get_step_id(check, rule));
break;
case TCPCHK_EXPECT_CUSTOM:
chunk_appendf(msg, " (custom function) at step %d", tcpcheck_get_step_id(check, rule));
break;
case TCPCHK_EXPECT_HTTP_HEADER:
chunk_appendf(msg, " (header pattern) at step %d", tcpcheck_get_step_id(check, rule));
case TCPCHK_EXPECT_UNDEF:
/* Should never happen. */
return;
}
comment:
/* If the failing expect rule provides a comment, it is concatenated to
* the info message.
*/
if (rule->comment) {
chunk_strcat(msg, " comment: ");
chunk_strcat(msg, rule->comment);
}
/* Finally, the check status code is set if the failing expect rule
* defines a status expression.
*/
if (rule->expect.status_expr) {
smp = sample_fetch_as_type(check->proxy, check->sess, NULL, SMP_OPT_DIR_RES | SMP_OPT_FINAL,
rule->expect.status_expr, SMP_T_STR);
if (smp && sample_casts[smp->data.type][SMP_T_SINT] &&
sample_casts[smp->data.type][SMP_T_SINT](smp))
check->code = smp->data.u.sint;
}
*(b_tail(msg)) = '\0';
}
/* Creates info message when a tcp-check healthcheck succeeds on an expect rule */
static void tcpcheck_expect_onsuccess_message(struct buffer *msg, struct check *check, struct tcpcheck_rule *rule,
struct ist info)
{
struct sample *smp;
/* Follows these step to produce the info message:
* 1. if info field is already provided, copy it
* 2. if the expect rule provides an onsucces log-format string,
* use it to produce the message
* 3. the expect rule is part of a protocol check (http, redis, mysql...), do nothing
* 4. Otherwise produce the generic tcp-check info message
*/
if (istlen(info))
chunk_strncat(msg, istptr(info), istlen(info));
if (!LIST_ISEMPTY(&rule->expect.onsuccess_fmt))
msg->data += sess_build_logline(check->sess, NULL, b_tail(msg), b_room(msg),
&rule->expect.onsuccess_fmt);
else if (check->type == PR_O2_TCPCHK_CHK &&
(check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_TCP_CHK)
chunk_strcat(msg, "(tcp-check)");
/* Finally, the check status code is set if the expect rule defines a
* status expression.
*/
if (rule->expect.status_expr) {
smp = sample_fetch_as_type(check->proxy, check->sess, NULL, SMP_OPT_DIR_RES | SMP_OPT_FINAL,
rule->expect.status_expr, SMP_T_STR);
if (smp && sample_casts[smp->data.type][SMP_T_SINT] &&
sample_casts[smp->data.type][SMP_T_SINT](smp))
check->code = smp->data.u.sint;
}
*(b_tail(msg)) = '\0';
}
/* Internal functions to parse and validate a MySQL packet in the context of an
* expect rule. It start to parse the input buffer at the offset <offset>. If
* <last_read> is set, no more data are expected.
*/
static enum tcpcheck_eval_ret tcpcheck_mysql_expect_packet(struct check *check, struct tcpcheck_rule *rule,
unsigned int offset, int last_read)
{
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
enum healthcheck_status status;
struct buffer *msg = NULL;
struct ist desc = IST_NULL;
unsigned int err = 0, plen = 0;
/* 3 Bytes for the packet length and 1 byte for the sequence id */
if (b_data(&check->bi) < offset+4) {
if (!last_read)
goto wait_more_data;
/* invalid length or truncated response */
status = HCHK_STATUS_L7RSP;
goto error;
}
plen = ((unsigned char) *b_peek(&check->bi, offset)) +
(((unsigned char) *(b_peek(&check->bi, offset+1))) << 8) +
(((unsigned char) *(b_peek(&check->bi, offset+2))) << 16);
if (b_data(&check->bi) < offset+plen+4) {
if (!last_read)
goto wait_more_data;
/* invalid length or truncated response */
status = HCHK_STATUS_L7RSP;
goto error;
}
if (*b_peek(&check->bi, offset+4) == '\xff') {
/* MySQL Error packet always begin with field_count = 0xff */
status = HCHK_STATUS_L7STS;
err = ((unsigned char) *b_peek(&check->bi, offset+5)) +
(((unsigned char) *(b_peek(&check->bi, offset+6))) << 8);
desc = ist2(b_peek(&check->bi, offset+7), b_data(&check->bi) - offset - 7);
goto error;
}
if (get_next_tcpcheck_rule(check->tcpcheck_rules, rule) != NULL) {
/* Not the last rule, continue */
goto out;
}
/* We set the MySQL Version in description for information purpose
* FIXME : it can be cool to use MySQL Version for other purpose,
* like mark as down old MySQL server.
*/
status = ((rule->expect.ok_status != HCHK_STATUS_UNKNOWN) ? rule->expect.ok_status : HCHK_STATUS_L7OKD);
set_server_check_status(check, status, b_peek(&check->bi, 5));
out:
free_trash_chunk(msg);
return ret;
error:
ret = TCPCHK_EVAL_STOP;
check->code = err;
msg = alloc_trash_chunk();
if (msg)
tcpcheck_expect_onerror_message(msg, check, rule, 0, desc);
set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
goto out;
wait_more_data:
ret = TCPCHK_EVAL_WAIT;
goto out;
}
/* Custom tcp-check expect function to parse and validate the MySQL initial
* handshake packet. Returns TCPCHK_EVAL_WAIT to wait for more data,
* TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP if an
* error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_mysql_expect_iniths(struct check *check, struct tcpcheck_rule *rule, int last_read)
{
return tcpcheck_mysql_expect_packet(check, rule, 0, last_read);
}
/* Custom tcp-check expect function to parse and validate the MySQL OK packet
* following the initial handshake. Returns TCPCHK_EVAL_WAIT to wait for more
* data, TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP if
* an error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_mysql_expect_ok(struct check *check, struct tcpcheck_rule *rule, int last_read)
{
unsigned int hslen = 0;
hslen = 4 + ((unsigned char) *b_head(&check->bi)) +
(((unsigned char) *(b_peek(&check->bi, 1))) << 8) +
(((unsigned char) *(b_peek(&check->bi, 2))) << 16);
return tcpcheck_mysql_expect_packet(check, rule, hslen, last_read);
}
/* Custom tcp-check expect function to parse and validate the LDAP bind response
* package packet. Returns TCPCHK_EVAL_WAIT to wait for more data,
* TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP if an
* error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_ldap_expect_bindrsp(struct check *check, struct tcpcheck_rule *rule, int last_read)
{
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
enum healthcheck_status status;
struct buffer *msg = NULL;
struct ist desc = IST_NULL;
unsigned short msglen = 0;
/* Check if the server speaks LDAP (ASN.1/BER)
* http://en.wikipedia.org/wiki/Basic_Encoding_Rules
* http://tools.ietf.org/html/rfc4511
*/
/* size of LDAPMessage */
msglen = (*(b_head(&check->bi) + 1) & 0x80) ? (*(b_head(&check->bi) + 1) & 0x7f) : 0;
/* http://tools.ietf.org/html/rfc4511#section-4.2.2
* messageID: 0x02 0x01 0x01: INTEGER 1
* protocolOp: 0x61: bindResponse
*/
if ((msglen > 2) || (memcmp(b_head(&check->bi) + 2 + msglen, "\x02\x01\x01\x61", 4) != 0)) {
status = HCHK_STATUS_L7RSP;
desc = ist("Not LDAPv3 protocol");
goto error;
}
/* size of bindResponse */
msglen += (*(b_head(&check->bi) + msglen + 6) & 0x80) ? (*(b_head(&check->bi) + msglen + 6) & 0x7f) : 0;
/* http://tools.ietf.org/html/rfc4511#section-4.1.9
* ldapResult: 0x0a 0x01: ENUMERATION
*/
if ((msglen > 4) || (memcmp(b_head(&check->bi) + 7 + msglen, "\x0a\x01", 2) != 0)) {
status = HCHK_STATUS_L7RSP;
desc = ist("Not LDAPv3 protocol");
goto error;
}
/* http://tools.ietf.org/html/rfc4511#section-4.1.9
* resultCode
*/
check->code = *(b_head(&check->bi) + msglen + 9);
if (check->code) {
status = HCHK_STATUS_L7STS;
desc = ist("See RFC: http://tools.ietf.org/html/rfc4511#section-4.1.9");
goto error;
}
status = ((rule->expect.ok_status != HCHK_STATUS_UNKNOWN) ? rule->expect.ok_status : HCHK_STATUS_L7OKD);
set_server_check_status(check, status, "Success");
out:
free_trash_chunk(msg);
return ret;
error:
ret = TCPCHK_EVAL_STOP;
msg = alloc_trash_chunk();
if (msg)
tcpcheck_expect_onerror_message(msg, check, rule, 0, desc);
set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
goto out;
}
/* Custom tcp-check expect function to parse and validate the SPOP hello agent
* frame. Returns TCPCHK_EVAL_WAIT to wait for more data, TCPCHK_EVAL_CONTINUE
* to evaluate the next rule or TCPCHK_EVAL_STOP if an error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_spop_expect_agenthello(struct check *check, struct tcpcheck_rule *rule, int last_read)
{
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
enum healthcheck_status status;
struct buffer *msg = NULL;
struct ist desc = IST_NULL;
unsigned int framesz;
memcpy(&framesz, b_head(&check->bi), 4);
framesz = ntohl(framesz);
if (!last_read && b_data(&check->bi) < (4+framesz))
goto wait_more_data;
memset(b_orig(&trash), 0, b_size(&trash));
if (spoe_handle_healthcheck_response(b_peek(&check->bi, 4), framesz, b_orig(&trash), HCHK_DESC_LEN) == -1) {
status = HCHK_STATUS_L7RSP;
desc = ist2(b_orig(&trash), strlen(b_orig(&trash)));
goto error;
}
status = ((rule->expect.ok_status != HCHK_STATUS_UNKNOWN) ? rule->expect.ok_status : HCHK_STATUS_L7OKD);
set_server_check_status(check, status, "SPOA server is ok");
out:
free_trash_chunk(msg);
return ret;
error:
ret = TCPCHK_EVAL_STOP;
msg = alloc_trash_chunk();
if (msg)
tcpcheck_expect_onerror_message(msg, check, rule, 0, desc);
set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
goto out;
wait_more_data:
ret = TCPCHK_EVAL_WAIT;
goto out;
}
/* Custom tcp-check expect function to parse and validate the agent-check
* reply. Returns TCPCHK_EVAL_WAIT to wait for more data, TCPCHK_EVAL_CONTINUE
* to evaluate the next rule or TCPCHK_EVAL_STOP if an error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_agent_expect_reply(struct check *check, struct tcpcheck_rule *rule, int last_read)
{
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_STOP;
enum healthcheck_status status = HCHK_STATUS_CHECKED;
const char *hs = NULL; /* health status */
const char *as = NULL; /* admin status */
const char *ps = NULL; /* performance status */
const char *cs = NULL; /* maxconn */
const char *err = NULL; /* first error to report */
const char *wrn = NULL; /* first warning to report */
char *cmd, *p;
/* We're getting an agent check response. The agent could
* have been disabled in the mean time with a long check
* still pending. It is important that we ignore the whole
* response.
*/
if (!(check->state & CHK_ST_ENABLED))
goto out;
/* The agent supports strings made of a single line ended by the
* first CR ('\r') or LF ('\n'). This line is composed of words
* delimited by spaces (' '), tabs ('\t'), or commas (','). The
* line may optionally contained a description of a state change
* after a sharp ('#'), which is only considered if a health state
* is announced.
*
* Words may be composed of :
* - a numeric weight suffixed by the percent character ('%').
* - a health status among "up", "down", "stopped", and "fail".
* - an admin status among "ready", "drain", "maint".
*
* These words may appear in any order. If multiple words of the
* same category appear, the last one wins.
*/
p = b_head(&check->bi);
while (*p && *p != '\n' && *p != '\r')
p++;
if (!*p) {
if (!last_read)
goto wait_more_data;
/* at least inform the admin that the agent is mis-behaving */
set_server_check_status(check, check->status, "Ignoring incomplete line from agent");
goto out;
}
*p = 0;
cmd = b_head(&check->bi);
while (*cmd) {
/* look for next word */
if (*cmd == ' ' || *cmd == '\t' || *cmd == ',') {
cmd++;
continue;
}
if (*cmd == '#') {
/* this is the beginning of a health status description,
* skip the sharp and blanks.
*/
cmd++;
while (*cmd == '\t' || *cmd == ' ')
cmd++;
break;
}
/* find the end of the word so that we have a null-terminated
* word between <cmd> and <p>.
*/
p = cmd + 1;
while (*p && *p != '\t' && *p != ' ' && *p != '\n' && *p != ',')
p++;
if (*p)
*p++ = 0;
/* first, health statuses */
if (strcasecmp(cmd, "up") == 0) {
check->server->check.health = check->server->check.rise + check->server->check.fall - 1;
status = HCHK_STATUS_L7OKD;
hs = cmd;
}
else if (strcasecmp(cmd, "down") == 0) {
check->server->check.health = 0;
status = HCHK_STATUS_L7STS;
hs = cmd;
}
else if (strcasecmp(cmd, "stopped") == 0) {
check->server->check.health = 0;
status = HCHK_STATUS_L7STS;
hs = cmd;
}
else if (strcasecmp(cmd, "fail") == 0) {
check->server->check.health = 0;
status = HCHK_STATUS_L7STS;
hs = cmd;
}
/* admin statuses */
else if (strcasecmp(cmd, "ready") == 0) {
as = cmd;
}
else if (strcasecmp(cmd, "drain") == 0) {
as = cmd;
}
else if (strcasecmp(cmd, "maint") == 0) {
as = cmd;
}
/* try to parse a weight here and keep the last one */
else if (isdigit((unsigned char)*cmd) && strchr(cmd, '%') != NULL) {
ps = cmd;
}
/* try to parse a maxconn here */
else if (strncasecmp(cmd, "maxconn:", strlen("maxconn:")) == 0) {
cs = cmd;
}
else {
/* keep a copy of the first error */
if (!err)
err = cmd;
}
/* skip to next word */
cmd = p;
}
/* here, cmd points either to \0 or to the beginning of a
* description. Skip possible leading spaces.
*/
while (*cmd == ' ' || *cmd == '\n')
cmd++;
/* First, update the admin status so that we avoid sending other
* possibly useless warnings and can also update the health if
* present after going back up.
*/
if (as) {
if (strcasecmp(as, "drain") == 0)
srv_adm_set_drain(check->server);
else if (strcasecmp(as, "maint") == 0)
srv_adm_set_maint(check->server);
else
srv_adm_set_ready(check->server);
}
/* now change weights */
if (ps) {
const char *msg;
msg = server_parse_weight_change_request(check->server, ps);
if (!wrn || !*wrn)
wrn = msg;
}
if (cs) {
const char *msg;
cs += strlen("maxconn:");
msg = server_parse_maxconn_change_request(check->server, cs);
if (!wrn || !*wrn)
wrn = msg;
}
/* and finally health status */
if (hs) {
/* We'll report some of the warnings and errors we have
* here. Down reports are critical, we leave them untouched.
* Lack of report, or report of 'UP' leaves the room for
* ERR first, then WARN.
*/
const char *msg = cmd;
struct buffer *t;
if (!*msg || status == HCHK_STATUS_L7OKD) {
if (err && *err)
msg = err;
else if (wrn && *wrn)
msg = wrn;
}
t = get_trash_chunk();
chunk_printf(t, "via agent : %s%s%s%s",
hs, *msg ? " (" : "",
msg, *msg ? ")" : "");
set_server_check_status(check, status, t->area);
}
else if (err && *err) {
/* No status change but we'd like to report something odd.
* Just report the current state and copy the message.
*/
chunk_printf(&trash, "agent reports an error : %s", err);
set_server_check_status(check, status/*check->status*/, trash.area);
}
else if (wrn && *wrn) {
/* No status change but we'd like to report something odd.
* Just report the current state and copy the message.
*/
chunk_printf(&trash, "agent warns : %s", wrn);
set_server_check_status(check, status/*check->status*/, trash.area);
}
else
set_server_check_status(check, status, NULL);
out:
return ret;
wait_more_data:
ret = TCPCHK_EVAL_WAIT;
goto out;
}
/* Evaluates a TCPCHK_ACT_CONNECT rule. Returns TCPCHK_EVAL_WAIT to wait the
* connection establishment, TCPCHK_EVAL_CONTINUE to evaluate the next rule or
* TCPCHK_EVAL_STOP if an error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_eval_connect(struct check *check, struct tcpcheck_rule *rule)
{
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
struct tcpcheck_connect *connect = &rule->connect;
struct proxy *proxy = check->proxy;
struct server *s = check->server;
struct task *t = check->task;
struct conn_stream *cs;
struct connection *conn = NULL;
struct protocol *proto;
struct xprt_ops *xprt;
struct tcpcheck_rule *next;
int status, port;
/* For a connect action we'll create a new connection. We may also have
* to kill a previous one. But we don't want to leave *without* a
* connection if we came here from the connection layer, hence with a
* connection. Thus we'll proceed in the following order :
* 1: close but not release previous connection (handled by the caller)
* 2: try to get a new connection
* 3: release and replace the old one on success
*/
/* 2- prepare new connection */
cs = cs_new(NULL, (s ? &s->obj_type : &proxy->obj_type));
if (!cs) {
chunk_printf(&trash, "TCPCHK error allocating connection at step %d",
tcpcheck_get_step_id(check, rule));
if (rule->comment)
chunk_appendf(&trash, " comment: '%s'", rule->comment);
set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area);
ret = TCPCHK_EVAL_STOP;
goto out;
}
/* 3- release and replace the old one on success */
if (check->cs) {
if (check->wait_list.events)
check->cs->conn->mux->unsubscribe(check->cs, check->wait_list.events,
&check->wait_list);
/* We may have been scheduled to run, and the I/O handler
* expects to have a cs, so remove the tasklet
*/
tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
cs_destroy(check->cs);
}
tasklet_set_tid(check->wait_list.tasklet, tid);
check->cs = cs;
conn = cs->conn;
conn_set_owner(conn, check->sess, NULL);
/* Maybe there were an older connection we were waiting on */
check->wait_list.events = 0;
/* no client address */
if (!sockaddr_alloc(&conn->dst, NULL, 0)) {
status = SF_ERR_RESOURCE;
goto fail_check;
}
/* connect to the connect rule addr if specified, otherwise the check
* addr if specified on the server. otherwise, use the server addr (it
* MUST exist at this step).
*/
*conn->dst = (is_addr(&connect->addr)
? connect->addr
: (is_addr(&check->addr) ? check->addr : s->addr));
proto = protocol_by_family(conn->dst->ss_family);
port = 0;
if (!port && connect->port)
port = connect->port;
if (!port && connect->port_expr) {
struct sample *smp;
smp = sample_fetch_as_type(check->proxy, check->sess, NULL,
SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
connect->port_expr, SMP_T_SINT);
if (smp)
port = smp->data.u.sint;
}
if (!port && is_inet_addr(&connect->addr))
port = get_host_port(&connect->addr);
if (!port && check->port)
port = check->port;
if (!port && is_inet_addr(&check->addr))
port = get_host_port(&check->addr);
if (!port) {
/* The server MUST exist here */
port = s->svc_port;
}
set_host_port(conn->dst, port);
xprt = ((connect->options & TCPCHK_OPT_SSL)
? xprt_get(XPRT_SSL)
: ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) ? check->xprt : xprt_get(XPRT_RAW)));
conn_prepare(conn, proto, xprt);
cs_attach(cs, check, &check_conn_cb);
if ((connect->options & TCPCHK_OPT_SOCKS4) && s && (s->flags & SRV_F_SOCKS4_PROXY)) {
conn->send_proxy_ofs = 1;
conn->flags |= CO_FL_SOCKS4;
}
else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.via_socks4 && (s->flags & SRV_F_SOCKS4_PROXY)) {
conn->send_proxy_ofs = 1;
conn->flags |= CO_FL_SOCKS4;
}
if (connect->options & TCPCHK_OPT_SEND_PROXY) {
conn->send_proxy_ofs = 1;
conn->flags |= CO_FL_SEND_PROXY;
}
else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.send_proxy && !(check->state & CHK_ST_AGENT)) {
conn->send_proxy_ofs = 1;
conn->flags |= CO_FL_SEND_PROXY;
}
status = SF_ERR_INTERNAL;
next = get_next_tcpcheck_rule(check->tcpcheck_rules, rule);
if (proto && proto->connect) {
int flags = 0;
if (check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK)
flags |= CONNECT_HAS_DATA;
if (!next || next->action != TCPCHK_ACT_EXPECT)
flags |= CONNECT_DELACK_ALWAYS;
status = proto->connect(conn, flags);
}
if (status != SF_ERR_NONE)
goto fail_check;
conn_set_private(conn);
conn->ctx = cs;
#ifdef USE_OPENSSL
if (connect->sni)
ssl_sock_set_servername(conn, connect->sni);
else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.sni)
ssl_sock_set_servername(conn, s->check.sni);
if (connect->alpn)
ssl_sock_set_alpn(conn, (unsigned char *)connect->alpn, connect->alpn_len);
else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.alpn_str)
ssl_sock_set_alpn(conn, (unsigned char *)s->check.alpn_str, s->check.alpn_len);
#endif
if (conn_ctrl_ready(conn) && (connect->options & TCPCHK_OPT_LINGER)) {
/* Some servers don't like reset on close */
fdtab[cs->conn->handle.fd].linger_risk = 0;
}
if (conn_ctrl_ready(conn) && (conn->flags & (CO_FL_SEND_PROXY | CO_FL_SOCKS4))) {
if (xprt_add_hs(conn) < 0)
status = SF_ERR_RESOURCE;
}
/* The mux may be initialized now if there isn't server attached to the
* check (email alerts) or if there is a mux proto specified or if there
* is no alpn.
*/
if (!s || ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && check->mux_proto) ||
connect->mux_proto || (!connect->alpn && !check->alpn_str)) {
const struct mux_ops *mux_ops;
if (connect->mux_proto)
mux_ops = connect->mux_proto->mux;
else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && check->mux_proto)
mux_ops = check->mux_proto->mux;
else {
int mode = ((check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK
? PROTO_MODE_HTTP
: PROTO_MODE_TCP);
mux_ops = conn_get_best_mux(conn, IST_NULL, PROTO_SIDE_BE, mode);
}
if (mux_ops && conn_install_mux(conn, mux_ops, cs, proxy, check->sess) < 0) {
status = SF_ERR_INTERNAL;
goto fail_check;
}
}
fail_check:
/* It can return one of :
* - SF_ERR_NONE if everything's OK
* - SF_ERR_SRVTO if there are no more servers
* - SF_ERR_SRVCL if the connection was refused by the server
* - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
* - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
* - SF_ERR_INTERNAL for any other purely internal errors
* Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
* Note that we try to prevent the network stack from sending the ACK during the
* connect() when a pure TCP check is used (without PROXY protocol).
*/
switch (status) {
case SF_ERR_NONE:
/* we allow up to min(inter, timeout.connect) for a connection
* to establish but only when timeout.check is set as it may be
* to short for a full check otherwise
*/
t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
if (proxy->timeout.check && proxy->timeout.connect) {
int t_con = tick_add(now_ms, proxy->timeout.connect);
t->expire = tick_first(t->expire, t_con);
}
break;
case SF_ERR_SRVTO: /* ETIMEDOUT */
case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */
case SF_ERR_PRXCOND:
case SF_ERR_RESOURCE:
case SF_ERR_INTERNAL:
chk_report_conn_err(check, errno, 0);
ret = TCPCHK_EVAL_STOP;
goto out;
}
/* don't do anything until the connection is established */
if (conn->flags & CO_FL_WAIT_XPRT) {
if (conn->mux) {
if (next && next->action == TCPCHK_ACT_SEND)
conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
else
conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
}
ret = TCPCHK_EVAL_WAIT;
goto out;
}
out:
if (conn && check->result == CHK_RES_FAILED)
conn->flags |= CO_FL_ERROR;
return ret;
}
/* Evaluates a TCPCHK_ACT_SEND rule. Returns TCPCHK_EVAL_WAIT if outgoing data
* were not fully sent, TCPCHK_EVAL_CONTINUE to evaluate the next rule or
* TCPCHK_EVAL_STOP if an error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_eval_send(struct check *check, struct tcpcheck_rule *rule)
{
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
struct tcpcheck_send *send = &rule->send;
struct conn_stream *cs = check->cs;
struct connection *conn = cs_conn(cs);
struct buffer *tmp = NULL;
struct htx *htx = NULL;
/* reset the read & write buffer */
b_reset(&check->bi);
b_reset(&check->bo);
switch (send->type) {
case TCPCHK_SEND_STRING:
case TCPCHK_SEND_BINARY:
if (istlen(send->data) >= b_size(&check->bo)) {
chunk_printf(&trash, "tcp-check send : string too large (%u) for buffer size (%u) at step %d",
(unsigned int)istlen(send->data), (unsigned int)b_size(&check->bo),
tcpcheck_get_step_id(check, rule));
set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
ret = TCPCHK_EVAL_STOP;
goto out;
}
b_putist(&check->bo, send->data);
break;
case TCPCHK_SEND_STRING_LF:
check->bo.data = sess_build_logline(check->sess, NULL, b_orig(&check->bo), b_size(&check->bo), &rule->send.fmt);
if (!b_data(&check->bo))
goto out;
break;
case TCPCHK_SEND_BINARY_LF: {
int len = b_size(&check->bo);
tmp = alloc_trash_chunk();
if (!tmp)
goto error_lf;
tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &rule->send.fmt);
if (!b_data(tmp))
goto out;
tmp->area[tmp->data] = '\0';
if (parse_binary(b_orig(tmp), &check->bo.area, &len, NULL) == 0)
goto error_lf;
check->bo.data = len;
break;
}
case TCPCHK_SEND_HTTP: {
struct htx_sl *sl;
struct ist meth, uri, vsn, clen, body;
unsigned int slflags = 0;
tmp = alloc_trash_chunk();
if (!tmp)
goto error_htx;
meth = ((send->http.meth.meth == HTTP_METH_OTHER)
? ist2(send->http.meth.str.area, send->http.meth.str.data)
: http_known_methods[send->http.meth.meth]);
if (send->http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) {
tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &send->http.uri_fmt);
uri = (b_data(tmp) ? ist2(b_orig(tmp), b_data(tmp)) : ist("/"));
}
else
uri = (isttest(send->http.uri) ? send->http.uri : ist("/"));
vsn = (isttest(send->http.vsn) ? send->http.vsn : ist("HTTP/1.0"));
if ((istlen(vsn) == 6 && *(vsn.ptr+5) == '2') ||
(istlen(vsn) == 8 && (*(vsn.ptr+5) > '1' || (*(vsn.ptr+5) == '1' && *(vsn.ptr+7) >= '1'))))
slflags |= HTX_SL_F_VER_11;
slflags |= (HTX_SL_F_XFER_LEN|HTX_SL_F_CLEN);
if (!isttest(send->http.body))
slflags |= HTX_SL_F_BODYLESS;
htx = htx_from_buf(&check->bo);
sl = htx_add_stline(htx, HTX_BLK_REQ_SL, slflags, meth, uri, vsn);
if (!sl)
goto error_htx;
sl->info.req.meth = send->http.meth.meth;
if (!http_update_host(htx, sl, uri))
goto error_htx;
if (!LIST_ISEMPTY(&send->http.hdrs)) {
struct tcpcheck_http_hdr *hdr;
struct ist hdr_value;
list_for_each_entry(hdr, &send->http.hdrs, list) {
chunk_reset(tmp);
tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &hdr->value);
if (!b_data(tmp))
continue;
hdr_value = ist2(b_orig(tmp), b_data(tmp));
if (!htx_add_header(htx, hdr->name, hdr_value))
goto error_htx;
if ((sl->flags & HTX_SL_F_HAS_AUTHORITY) && isteqi(hdr->name, ist("host"))) {
if (!http_update_authority(htx, sl, hdr_value))
goto error_htx;
}
}
}
if (check->proxy->options2 & PR_O2_CHK_SNDST) {
chunk_reset(tmp);
httpchk_build_status_header(check->server, tmp);
if (!htx_add_header(htx, ist("X-Haproxy-Server-State"), ist2(b_orig(tmp), b_data(tmp))))
goto error_htx;
}
if (send->http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) {
chunk_reset(tmp);
tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &send->http.body_fmt);
body = ist2(b_orig(tmp), b_data(tmp));
}
else
body = send->http.body;
clen = ist((!istlen(body) ? "0" : ultoa(istlen(body))));
if (!htx_add_header(htx, ist("Connection"), ist("close")) ||
!htx_add_header(htx, ist("Content-length"), clen))
goto error_htx;
if (!htx_add_endof(htx, HTX_BLK_EOH) ||
(istlen(body) && !htx_add_data_atonce(htx, body)))
goto error_htx;
htx->flags |= HTX_FL_EOI; /* no more data are expected. Only EOM remains to add now */
if (!htx_add_endof(htx, HTX_BLK_EOM))
goto error_htx;
htx_to_buf(htx, &check->bo);
break;
}
case TCPCHK_SEND_UNDEF:
/* Should never happen. */
ret = TCPCHK_EVAL_STOP;
goto out;
};
if (conn->mux->snd_buf(cs, &check->bo,
(IS_HTX_CONN(conn) ? (htxbuf(&check->bo))->data: b_data(&check->bo)), 0) <= 0) {
if ((conn->flags & CO_FL_ERROR) || (cs->flags & CS_FL_ERROR)) {
ret = TCPCHK_EVAL_STOP;
goto out;
}
}
if ((IS_HTX_CONN(conn) && !htx_is_empty(htxbuf(&check->bo))) || b_data(&check->bo)) {
cs->conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
ret = TCPCHK_EVAL_WAIT;
goto out;
}
out:
free_trash_chunk(tmp);
return ret;
error_htx:
if (htx) {
htx_reset(htx);
htx_to_buf(htx, &check->bo);
}
chunk_printf(&trash, "tcp-check send : failed to build HTTP request at step %d",
tcpcheck_get_step_id(check, rule));
set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
ret = TCPCHK_EVAL_STOP;
goto out;
error_lf:
chunk_printf(&trash, "tcp-check send : failed to build log-format string at step %d",
tcpcheck_get_step_id(check, rule));
set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
ret = TCPCHK_EVAL_STOP;
goto out;
}
/* Try to receive data before evaluating a tcp-check expect rule. Returns
* TCPCHK_EVAL_WAIT if it is already subscribed on receive events or if nothing
* was received, TCPCHK_EVAL_CONTINUE to evaluate the expect rule or
* TCPCHK_EVAL_STOP if an error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_eval_recv(struct check *check, struct tcpcheck_rule *rule)
{
struct conn_stream *cs = check->cs;
struct connection *conn = cs_conn(cs);
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
size_t max, read, cur_read = 0;
int is_empty;
int read_poll = MAX_READ_POLL_LOOPS;
if (check->wait_list.events & SUB_RETRY_RECV)
goto wait_more_data;
if (cs->flags & CS_FL_EOS)
goto end_recv;
/* errors on the connection and the conn-stream were already checked */
/* prepare to detect if the mux needs more room */
cs->flags &= ~CS_FL_WANT_ROOM;
while ((cs->flags & CS_FL_RCV_MORE) ||
(!(conn->flags & CO_FL_ERROR) && !(cs->flags & (CS_FL_ERROR|CS_FL_EOS)))) {
max = (IS_HTX_CS(cs) ? htx_free_space(htxbuf(&check->bi)) : b_room(&check->bi));
read = conn->mux->rcv_buf(cs, &check->bi, max, 0);
cur_read += read;
if (!read ||
(cs->flags & CS_FL_WANT_ROOM) ||
(--read_poll <= 0) ||
(read < max && read >= global.tune.recv_enough))
break;
}
end_recv:
is_empty = (IS_HTX_CS(cs) ? htx_is_empty(htxbuf(&check->bi)) : !b_data(&check->bi));
if (is_empty && ((conn->flags & CO_FL_ERROR) || (cs->flags & CS_FL_ERROR))) {
/* Report network errors only if we got no other data. Otherwise
* we'll let the upper layers decide whether the response is OK
* or not. It is very common that an RST sent by the server is
* reported as an error just after the last data chunk.
*/
goto stop;
}
if (!cur_read) {
if (!(cs->flags & (CS_FL_WANT_ROOM|CS_FL_ERROR|CS_FL_EOS))) {
conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
goto wait_more_data;
}
if (is_empty) {
int status;
chunk_printf(&trash, "TCPCHK got an empty response at step %d",
tcpcheck_get_step_id(check, rule));
if (rule->comment)
chunk_appendf(&trash, " comment: '%s'", rule->comment);
status = ((rule->expect.err_status != HCHK_STATUS_UNKNOWN) ? rule->expect.err_status : HCHK_STATUS_L7RSP);
set_server_check_status(check, status, trash.area);
goto stop;
}
}
out:
return ret;
stop:
ret = TCPCHK_EVAL_STOP;
goto out;
wait_more_data:
ret = TCPCHK_EVAL_WAIT;
goto out;
}
/* Evaluates an HTTP TCPCHK_ACT_EXPECT rule. If <last_read> is set , no more data
* are expected. Returns TCPCHK_EVAL_WAIT to wait for more data,
* TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP if an
* error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_eval_expect_http(struct check *check, struct tcpcheck_rule *rule, int last_read)
{
struct htx *htx = htxbuf(&check->bi);
struct htx_sl *sl;
struct htx_blk *blk;
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
struct tcpcheck_expect *expect = &rule->expect;
struct buffer *msg = NULL, *tmp = NULL, *nbuf = NULL, *vbuf = NULL;
enum healthcheck_status status = HCHK_STATUS_L7RSP;
struct ist desc = IST_NULL;
int i, match, inverse;
last_read |= (!htx_free_space(htx) || (htx_get_tail_type(htx) == HTX_BLK_EOM));
if (htx->flags & HTX_FL_PARSING_ERROR) {
status = HCHK_STATUS_L7RSP;
goto error;
}
if (htx_is_empty(htx)) {
if (last_read) {
status = HCHK_STATUS_L7RSP;
goto error;
}
goto wait_more_data;
}
sl = http_get_stline(htx);
check->code = sl->info.res.status;
if (check->server &&
(check->server->proxy->options & PR_O_DISABLE404) &&
(check->server->next_state != SRV_ST_STOPPED) &&
(check->code == 404)) {
/* 404 may be accepted as "stopping" only if the server was up */
goto out;
}
inverse = !!(expect->flags & TCPCHK_EXPT_FL_INV);
/* Make GCC happy ; initialize match to a failure state. */
match = inverse;
status = expect->err_status;
switch (expect->type) {
case TCPCHK_EXPECT_HTTP_STATUS:
match = 0;
for (i = 0; i < expect->codes.num; i++) {
if (sl->info.res.status >= expect->codes.codes[i][0] &&
sl->info.res.status <= expect->codes.codes[i][1]) {
match = 1;
break;
}
}
/* Set status and description in case of error */
status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7STS);
if (LIST_ISEMPTY(&expect->onerror_fmt))
desc = htx_sl_res_reason(sl);
break;
case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
match = regex_exec2(expect->regex, HTX_SL_RES_CPTR(sl), HTX_SL_RES_CLEN(sl));
/* Set status and description in case of error */
status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7STS);
if (LIST_ISEMPTY(&expect->onerror_fmt))
desc = htx_sl_res_reason(sl);
break;
case TCPCHK_EXPECT_HTTP_HEADER: {
struct http_hdr_ctx ctx;
struct ist npat, vpat, value;
int full = (expect->flags & (TCPCHK_EXPT_FL_HTTP_HVAL_NONE|TCPCHK_EXPT_FL_HTTP_HVAL_FULL));
if (expect->flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT) {
nbuf = alloc_trash_chunk();
if (!nbuf) {
status = HCHK_STATUS_L7RSP;
desc = ist("Failed to allocate buffer to eval log-format string");
goto error;
}
nbuf->data = sess_build_logline(check->sess, NULL, b_orig(nbuf), b_size(nbuf), &expect->hdr.name_fmt);
if (!b_data(nbuf)) {
status = HCHK_STATUS_L7RSP;
desc = ist("log-format string evaluated to an empty string");
goto error;
}
npat = ist2(b_orig(nbuf), b_data(nbuf));
}
else if (!(expect->flags & TCPCHK_EXPT_FL_HTTP_HNAME_REG))
npat = expect->hdr.name;
if (expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT) {
vbuf = alloc_trash_chunk();
if (!vbuf) {
status = HCHK_STATUS_L7RSP;
desc = ist("Failed to allocate buffer to eval log-format string");
goto error;
}
vbuf->data = sess_build_logline(check->sess, NULL, b_orig(vbuf), b_size(vbuf), &expect->hdr.value_fmt);
if (!b_data(vbuf)) {
status = HCHK_STATUS_L7RSP;
desc = ist("log-format string evaluated to an empty string");
goto error;
}
vpat = ist2(b_orig(vbuf), b_data(vbuf));
}
else if (!(expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_REG))
vpat = expect->hdr.value;
match = 0;
ctx.blk = NULL;
while (1) {
switch (expect->flags & TCPCHK_EXPT_FL_HTTP_HNAME_TYPE) {
case TCPCHK_EXPT_FL_HTTP_HNAME_STR:
if (!http_find_str_header(htx, npat, &ctx, full))
goto end_of_match;
break;
case TCPCHK_EXPT_FL_HTTP_HNAME_BEG:
if (!http_find_pfx_header(htx, npat, &ctx, full))
goto end_of_match;
break;
case TCPCHK_EXPT_FL_HTTP_HNAME_END:
if (!http_find_sfx_header(htx, npat, &ctx, full))
goto end_of_match;
break;
case TCPCHK_EXPT_FL_HTTP_HNAME_SUB:
if (!http_find_sub_header(htx, npat, &ctx, full))
goto end_of_match;
break;
case TCPCHK_EXPT_FL_HTTP_HNAME_REG:
if (!http_match_header(htx, expect->hdr.name_re, &ctx, full))
goto end_of_match;
break;
default:
/* should never happen */
goto end_of_match;
}
/* A header has matched the name pattern, let's test its
* value now (always defined from there). If there is no
* value pattern, it is a good match.
*/
if (expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_NONE) {
match = 1;
goto end_of_match;
}
value = ctx.value;
switch (expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_TYPE) {
case TCPCHK_EXPT_FL_HTTP_HVAL_STR:
if (isteq(value, vpat)) {
match = 1;
goto end_of_match;
}
break;
case TCPCHK_EXPT_FL_HTTP_HVAL_BEG:
if (istlen(value) < istlen(vpat))
break;
value = ist2(istptr(value), istlen(vpat));
if (isteq(value, vpat)) {
match = 1;
goto end_of_match;
}
break;
case TCPCHK_EXPT_FL_HTTP_HVAL_END:
if (istlen(value) < istlen(vpat))
break;
value = ist2(istptr(value) + istlen(value) - istlen(vpat), istlen(vpat));
if (isteq(value, vpat)) {
match = 1;
goto end_of_match;
}
break;
case TCPCHK_EXPT_FL_HTTP_HVAL_SUB:
if (isttest(istist(value, vpat))) {
match = 1;
goto end_of_match;
}
break;
case TCPCHK_EXPT_FL_HTTP_HVAL_REG:
if (regex_exec2(expect->hdr.value_re, istptr(value), istlen(value))) {
match = 1;
goto end_of_match;
}
break;
}
}
end_of_match:
status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7STS);
if (LIST_ISEMPTY(&expect->onerror_fmt))
desc = htx_sl_res_reason(sl);
break;
}
case TCPCHK_EXPECT_HTTP_BODY:
case TCPCHK_EXPECT_HTTP_BODY_REGEX:
case TCPCHK_EXPECT_HTTP_BODY_LF:
match = 0;
chunk_reset(&trash);
for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
enum htx_blk_type type = htx_get_blk_type(blk);
if (type == HTX_BLK_EOM || type == HTX_BLK_TLR || type == HTX_BLK_EOT)
break;
if (type == HTX_BLK_DATA) {
if (!chunk_istcat(&trash, htx_get_blk_value(htx, blk)))
break;
}
}
if (!b_data(&trash)) {
if (!last_read)
goto wait_more_data;
status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7RSP);
if (LIST_ISEMPTY(&expect->onerror_fmt))
desc = ist("HTTP content check could not find a response body");
goto error;
}
if (expect->type == TCPCHK_EXPECT_HTTP_BODY_LF) {
tmp = alloc_trash_chunk();
if (!tmp) {
status = HCHK_STATUS_L7RSP;
desc = ist("Failed to allocate buffer to eval log-format string");
goto error;
}
tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &expect->fmt);
if (!b_data(tmp)) {
status = HCHK_STATUS_L7RSP;
desc = ist("log-format string evaluated to an empty string");
goto error;
}
}
if (!last_read &&
((expect->type == TCPCHK_EXPECT_HTTP_BODY && b_data(&trash) < istlen(expect->data)) ||
((expect->type == TCPCHK_EXPECT_HTTP_BODY_LF && b_data(&trash) < b_data(tmp))) ||
(expect->min_recv > 0 && b_data(&trash) < expect->min_recv))) {
ret = TCPCHK_EVAL_WAIT;
goto out;
}
if (expect->type ==TCPCHK_EXPECT_HTTP_BODY)
match = my_memmem(b_orig(&trash), b_data(&trash), istptr(expect->data), istlen(expect->data)) != NULL;
else if (expect->type ==TCPCHK_EXPECT_HTTP_BODY_LF)
match = my_memmem(b_orig(&trash), b_data(&trash), b_orig(tmp), b_data(tmp)) != NULL;
else
match = regex_exec2(expect->regex, b_orig(&trash), b_data(&trash));
/* Set status and description in case of error */
status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7RSP);
if (LIST_ISEMPTY(&expect->onerror_fmt))
desc = (inverse
? ist("HTTP check matched unwanted content")
: ist("HTTP content check did not match"));
break;
default:
/* should never happen */
status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7RSP);
goto error;
}
/* Wait for more data on mismatch only if no minimum is defined (-1),
* otherwise the absence of match is already conclusive.
*/
if (!match && !last_read && (expect->min_recv == -1)) {
ret = TCPCHK_EVAL_WAIT;
goto out;
}
if (!(match ^ inverse))
goto error;
out:
free_trash_chunk(tmp);
free_trash_chunk(nbuf);
free_trash_chunk(vbuf);
free_trash_chunk(msg);
return ret;
error:
ret = TCPCHK_EVAL_STOP;
msg = alloc_trash_chunk();
if (msg)
tcpcheck_expect_onerror_message(msg, check, rule, 0, desc);
set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
goto out;
wait_more_data:
ret = TCPCHK_EVAL_WAIT;
goto out;
}
/* Evaluates a TCP TCPCHK_ACT_EXPECT rule. Returns TCPCHK_EVAL_WAIT to wait for
* more data, TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP
* if an error occurred.
*/
enum tcpcheck_eval_ret tcpcheck_eval_expect(struct check *check, struct tcpcheck_rule *rule, int last_read)
{
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
struct tcpcheck_expect *expect = &rule->expect;
struct buffer *msg = NULL, *tmp = NULL;
struct ist desc = IST_NULL;
enum healthcheck_status status;
int match, inverse;
last_read |= b_full(&check->bi);
/* The current expect might need more data than the previous one, check again
* that the minimum amount data required to match is respected.
*/
if (!last_read) {
if ((expect->type == TCPCHK_EXPECT_STRING || expect->type == TCPCHK_EXPECT_BINARY) &&
(b_data(&check->bi) < istlen(expect->data))) {
ret = TCPCHK_EVAL_WAIT;
goto out;
}
if (expect->min_recv > 0 && (b_data(&check->bi) < expect->min_recv)) {
ret = TCPCHK_EVAL_WAIT;
goto out;
}
}
inverse = !!(expect->flags & TCPCHK_EXPT_FL_INV);
/* Make GCC happy ; initialize match to a failure state. */
match = inverse;
status = ((expect->err_status != HCHK_STATUS_UNKNOWN) ? expect->err_status : HCHK_STATUS_L7RSP);
switch (expect->type) {
case TCPCHK_EXPECT_STRING:
case TCPCHK_EXPECT_BINARY:
match = my_memmem(b_head(&check->bi), b_data(&check->bi), istptr(expect->data), istlen(expect->data)) != NULL;
break;
case TCPCHK_EXPECT_STRING_REGEX:
match = regex_exec2(expect->regex, b_head(&check->bi), MIN(b_data(&check->bi), b_size(&check->bi)-1));
break;
case TCPCHK_EXPECT_BINARY_REGEX:
chunk_reset(&trash);
dump_binary(&trash, b_head(&check->bi), b_data(&check->bi));
match = regex_exec2(expect->regex, b_head(&trash), MIN(b_data(&trash), b_size(&trash)-1));
break;
case TCPCHK_EXPECT_STRING_LF:
case TCPCHK_EXPECT_BINARY_LF:
match = 0;
tmp = alloc_trash_chunk();
if (!tmp) {
status = HCHK_STATUS_L7RSP;
desc = ist("Failed to allocate buffer to eval format string");
goto error;
}
tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &expect->fmt);
if (!b_data(tmp)) {
status = HCHK_STATUS_L7RSP;
desc = ist("log-format string evaluated to an empty string");
goto error;
}
if (expect->type == TCPCHK_EXPECT_BINARY_LF) {
int len = tmp->data;
if (parse_binary(b_orig(tmp), &tmp->area, &len, NULL) == 0) {
status = HCHK_STATUS_L7RSP;
desc = ist("Failed to parse hexastring resulting of eval of a log-format string");
goto error;
}
tmp->data = len;
}
if (b_data(&check->bi) < tmp->data) {
if (!last_read) {
ret = TCPCHK_EVAL_WAIT;
goto out;
}
break;
}
match = my_memmem(b_head(&check->bi), b_data(&check->bi), b_orig(tmp), b_data(tmp)) != NULL;
break;
case TCPCHK_EXPECT_CUSTOM:
if (expect->custom)
ret = expect->custom(check, rule, last_read);
goto out;
default:
/* Should never happen. */
ret = TCPCHK_EVAL_STOP;
goto out;
}
/* Wait for more data on mismatch only if no minimum is defined (-1),
* otherwise the absence of match is already conclusive.
*/
if (!match && !last_read && (expect->min_recv == -1)) {
ret = TCPCHK_EVAL_WAIT;
goto out;
}
/* Result as expected, next rule. */
if (match ^ inverse)
goto out;
error:
/* From this point on, we matched something we did not want, this is an error state. */
ret = TCPCHK_EVAL_STOP;
msg = alloc_trash_chunk();
if (msg)
tcpcheck_expect_onerror_message(msg, check, rule, match, desc);
set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
free_trash_chunk(msg);
out:
free_trash_chunk(tmp);
return ret;
}
/* Evaluates a TCPCHK_ACT_ACTION_KW rule. Returns TCPCHK_EVAL_CONTINUE to
* evaluate the next rule or TCPCHK_EVAL_STOP if an error occurred. It never
* waits.
*/
enum tcpcheck_eval_ret tcpcheck_eval_action_kw(struct check *check, struct tcpcheck_rule *rule)
{
enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
struct act_rule *act_rule;
enum act_return act_ret;
act_rule =rule->action_kw.rule;
act_ret = act_rule->action_ptr(act_rule, check->proxy, check->sess, NULL, 0);
if (act_ret != ACT_RET_CONT) {
chunk_printf(&trash, "TCPCHK ACTION unexpected result at step %d\n",
tcpcheck_get_step_id(check, rule));
set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
ret = TCPCHK_EVAL_STOP;
}
return ret;
}
/* Executes a tcp-check ruleset. Note that this is called both from the
* connection's wake() callback and from the check scheduling task. It returns
* 0 on normal cases, or <0 if a close() has happened on an existing connection,
* presenting the risk of an fd replacement.
*
* Please do NOT place any return statement in this function and only leave
* via the out_end_tcpcheck label after setting retcode.
*/
int tcpcheck_main(struct check *check)
{
struct tcpcheck_rule *rule;
struct conn_stream *cs = check->cs;
struct connection *conn = cs_conn(cs);
int must_read = 1, last_read = 0;
int ret, retcode = 0;
enum tcpcheck_eval_ret eval_ret;
/* here, we know that the check is complete or that it failed */
if (check->result != CHK_RES_UNKNOWN)
goto out;
/* Note: the conn-stream and the connection may only be undefined before
* the first rule evaluation (it is always a connect rule) or when the
* conn-stream allocation failed on the first connect.
*/
/* 1- check for connection error, if any */
if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR))
goto out_end_tcpcheck;
/* 2- check if we are waiting for the connection establishment. It only
* happens during TCPCHK_ACT_CONNECT. */
if (check->current_step && check->current_step->action == TCPCHK_ACT_CONNECT) {
if (conn->flags & CO_FL_WAIT_XPRT) {
struct tcpcheck_rule *next;
next = get_next_tcpcheck_rule(check->tcpcheck_rules, check->current_step);
if (next && next->action == TCPCHK_ACT_SEND) {
if (!(check->wait_list.events & SUB_RETRY_SEND))
conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
goto out;
}
else {
eval_ret = tcpcheck_eval_recv(check, check->current_step);
if (eval_ret == TCPCHK_EVAL_STOP)
goto out_end_tcpcheck;
else if (eval_ret == TCPCHK_EVAL_WAIT)
goto out;
last_read = ((conn->flags & CO_FL_ERROR) || (cs->flags & (CS_FL_ERROR|CS_FL_EOS)));
must_read = 0;
}
}
rule = LIST_NEXT(&check->current_step->list, typeof(rule), list);
}
/* 3- check for pending outgoing data. It only happens during
* TCPCHK_ACT_SEND. */
else if (check->current_step && check->current_step->action == TCPCHK_ACT_SEND) {
if (b_data(&check->bo)) {
/* We're already waiting to be able to send, give up */
if (check->wait_list.events & SUB_RETRY_SEND)
goto out;
ret = conn->mux->snd_buf(cs, &check->bo,
(IS_HTX_CONN(conn) ? (htxbuf(&check->bo))->data: b_data(&check->bo)), 0);
if (ret <= 0) {
if ((conn->flags & CO_FL_ERROR) || (cs->flags & CS_FL_ERROR))
goto out_end_tcpcheck;
}
if ((IS_HTX_CONN(conn) && !htx_is_empty(htxbuf(&check->bo))) || b_data(&check->bo)) {
conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
goto out;
}
}
rule = LIST_NEXT(&check->current_step->list, typeof(rule), list);
}
/* 4- check if a rule must be resume. It happens if check->current_step
* is defined. */
else if (check->current_step)
rule = check->current_step;
/* 5- It is the first evaluation. We must create a session and preset
* tcp-check variables */
else {
struct tcpcheck_var *var;
/* First evaluation, create a session */
check->sess = session_new(&checks_fe, NULL, &check->obj_type);
if (!check->sess) {
chunk_printf(&trash, "TCPCHK error allocating check session");
set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area);
goto out_end_tcpcheck;
}
vars_init(&check->vars, SCOPE_CHECK);
rule = LIST_NEXT(check->tcpcheck_rules->list, typeof(rule), list);
/* Preset tcp-check variables */
list_for_each_entry(var, &check->tcpcheck_rules->preset_vars, list) {
struct sample smp;
memset(&smp, 0, sizeof(smp));
smp_set_owner(&smp, check->proxy, check->sess, NULL, SMP_OPT_FINAL);
smp.data = var->data;
vars_set_by_name_ifexist(istptr(var->name), istlen(var->name), &smp);
}
}
/* Now evaluate the tcp-check rules */
list_for_each_entry_from(rule, check->tcpcheck_rules->list, list) {
check->code = 0;
switch (rule->action) {
case TCPCHK_ACT_CONNECT:
check->current_step = rule;
/* close but not release yet previous connection */
if (check->cs) {
cs_close(check->cs);
retcode = -1; /* do not reuse the fd in the caller! */
}
eval_ret = tcpcheck_eval_connect(check, rule);
/* Refresh conn-stream and connection */
cs = check->cs;
conn = cs_conn(cs);
must_read = 1; last_read = 0;
break;
case TCPCHK_ACT_SEND:
check->current_step = rule;
eval_ret = tcpcheck_eval_send(check, rule);
must_read = 1;
break;
case TCPCHK_ACT_EXPECT:
check->current_step = rule;
if (must_read) {
if (check->proxy->timeout.check)
check->task->expire = tick_add_ifset(now_ms, check->proxy->timeout.check);
eval_ret = tcpcheck_eval_recv(check, rule);
if (eval_ret == TCPCHK_EVAL_STOP)
goto out_end_tcpcheck;
else if (eval_ret == TCPCHK_EVAL_WAIT)
goto out;
last_read = ((conn->flags & CO_FL_ERROR) || (cs->flags & (CS_FL_ERROR|CS_FL_EOS)));
must_read = 0;
}
eval_ret = ((check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK
? tcpcheck_eval_expect_http(check, rule, last_read)
: tcpcheck_eval_expect(check, rule, last_read));
if (eval_ret == TCPCHK_EVAL_WAIT) {
check->current_step = rule->expect.head;
if (!(check->wait_list.events & SUB_RETRY_RECV))
conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
}
break;
case TCPCHK_ACT_ACTION_KW:
/* Don't update the current step */
eval_ret = tcpcheck_eval_action_kw(check, rule);
break;
default:
/* Otherwise, just go to the next one and don't update
* the current step
*/
eval_ret = TCPCHK_EVAL_CONTINUE;
break;
}
switch (eval_ret) {
case TCPCHK_EVAL_CONTINUE:
break;
case TCPCHK_EVAL_WAIT:
goto out;
case TCPCHK_EVAL_STOP:
goto out_end_tcpcheck;
}
}
/* All rules was evaluated */
if (check->current_step) {
rule = check->current_step;
if (rule->action == TCPCHK_ACT_EXPECT) {
struct buffer *msg;
enum healthcheck_status status;
if (check->server &&
(check->server->proxy->options & PR_O_DISABLE404) &&
(check->server->next_state != SRV_ST_STOPPED) &&
(check->code == 404)) {
set_server_check_status(check, HCHK_STATUS_L7OKCD, NULL);
goto out_end_tcpcheck;
}
msg = alloc_trash_chunk();
if (msg)
tcpcheck_expect_onsuccess_message(msg, check, rule, IST_NULL);
status = ((rule->expect.ok_status != HCHK_STATUS_UNKNOWN) ? rule->expect.ok_status : HCHK_STATUS_L7OKD);
set_server_check_status(check, status, (msg ? b_head(msg) : "(tcp-check)"));
free_trash_chunk(msg);
}
else if (rule->action == TCPCHK_ACT_CONNECT) {
const char *msg = ((rule->connect.options & TCPCHK_OPT_IMPLICIT) ? NULL : "(tcp-check)");
enum healthcheck_status status = HCHK_STATUS_L4OK;
#ifdef USE_OPENSSL
if (ssl_sock_is_ssl(conn))
status = HCHK_STATUS_L6OK;
#endif
set_server_check_status(check, status, msg);
}
}
else
set_server_check_status(check, HCHK_STATUS_L7OKD, "(tcp-check)");
out_end_tcpcheck:
if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR))
chk_report_conn_err(check, errno, 0);
out:
return retcode;
}
/**************************************************************************/
/******************* Internals to parse tcp-check rules *******************/
/**************************************************************************/
struct action_kw_list tcp_check_keywords = {
.list = LIST_HEAD_INIT(tcp_check_keywords.list),
};
/* Creates a tcp-check rule resulting from parsing a custom keyword. NULL is
* returned on error.
*/
struct tcpcheck_rule *parse_tcpcheck_action(char **args, int cur_arg, struct proxy *px,
struct list *rules, struct action_kw *kw,
const char *file, int line, char **errmsg)
{
struct tcpcheck_rule *chk = NULL;
struct act_rule *actrule = NULL;
actrule = calloc(1, sizeof(*actrule));
if (!actrule) {
memprintf(errmsg, "out of memory");
goto error;
}
actrule->kw = kw;
actrule->from = ACT_F_TCP_CHK;
cur_arg++;
if (kw->parse((const char **)args, &cur_arg, px, actrule, errmsg) == ACT_RET_PRS_ERR) {
memprintf(errmsg, "'%s' : %s", kw->kw, *errmsg);
goto error;
}
chk = calloc(1, sizeof(*chk));
if (!chk) {
memprintf(errmsg, "out of memory");
goto error;
}
chk->action = TCPCHK_ACT_ACTION_KW;
chk->action_kw.rule = actrule;
return chk;
error:
free(actrule);
return NULL;
}
/* Parses and creates a tcp-check connect or an http-check connect rule. NULL is
* returned on error.
*/
struct tcpcheck_rule *parse_tcpcheck_connect(char **args, int cur_arg, struct proxy *px, struct list *rules,
const char *file, int line, char **errmsg)
{
struct tcpcheck_rule *chk = NULL;
struct sockaddr_storage *sk = NULL;
char *comment = NULL, *sni = NULL, *alpn = NULL;
struct sample_expr *port_expr = NULL;
const struct mux_proto_list *mux_proto = NULL;
unsigned short conn_opts = 0;
long port = 0;
int alpn_len = 0;
list_for_each_entry(chk, rules, list) {
if (chk->action == TCPCHK_ACT_CONNECT)
break;
if (chk->action == TCPCHK_ACT_COMMENT ||
chk->action == TCPCHK_ACT_ACTION_KW ||
(chk->action == TCPCHK_ACT_SEND && (chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)))
continue;
memprintf(errmsg, "first step MUST also be a 'connect', "
"optionally preceded by a 'set-var', an 'unset-var' or a 'comment', "
"when there is a 'connect' step in the tcp-check ruleset");
goto error;
}
cur_arg++;
while (*(args[cur_arg])) {
if (strcmp(args[cur_arg], "default") == 0)
conn_opts |= TCPCHK_OPT_DEFAULT_CONNECT;
else if (strcmp(args[cur_arg], "addr") == 0) {
int port1, port2;
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects <ipv4|ipv6> as argument.", args[cur_arg]);
goto error;
}
sk = str2sa_range(args[cur_arg+1], NULL, &port1, &port2, NULL, NULL,
errmsg, NULL, NULL, PA_O_RESOLVE | PA_O_PORT_OK | PA_O_STREAM | PA_O_CONNECT);
if (!sk) {
memprintf(errmsg, "'%s' : %s.", args[cur_arg], *errmsg);
goto error;
}
cur_arg++;
}
else if (strcmp(args[cur_arg], "port") == 0) {
const char *p, *end;
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a port number or a sample expression as argument.", args[cur_arg]);
goto error;
}
cur_arg++;
port = 0;
release_sample_expr(port_expr);
p = args[cur_arg]; end = p + strlen(p);
port = read_uint(&p, end);
if (p != end) {
int idx = 0;
px->conf.args.ctx = ARGC_SRV;
port_expr = sample_parse_expr((char *[]){args[cur_arg], NULL}, &idx,
file, line, errmsg, &px->conf.args, NULL);
if (!port_expr) {
memprintf(errmsg, "error detected while parsing port expression : %s", *errmsg);
goto error;
}
if (!(port_expr->fetch->val & SMP_VAL_BE_CHK_RUL)) {
memprintf(errmsg, "error detected while parsing port expression : "
" fetch method '%s' extracts information from '%s', "
"none of which is available here.\n",
args[cur_arg], sample_src_names(port_expr->fetch->use));
goto error;
}
px->http_needed |= !!(port_expr->fetch->use & SMP_USE_HTTP_ANY);
}
else if (port > 65535 || port < 1) {
memprintf(errmsg, "expects a valid TCP port (from range 1 to 65535) or a sample expression, got %s.",
args[cur_arg]);
goto error;
}
}
else if (strcmp(args[cur_arg], "proto") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a MUX protocol as argument.", args[cur_arg]);
goto error;
}
mux_proto = get_mux_proto(ist2(args[cur_arg+1], strlen(args[cur_arg+1])));
if (!mux_proto) {
memprintf(errmsg, "'%s' : unknown MUX protocol '%s'.", args[cur_arg], args[cur_arg+1]);
goto error;
}
cur_arg++;
}
else if (strcmp(args[cur_arg], "comment") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
goto error;
}
cur_arg++;
free(comment);
comment = strdup(args[cur_arg]);
if (!comment) {
memprintf(errmsg, "out of memory");
goto error;
}
}
else if (strcmp(args[cur_arg], "send-proxy") == 0)
conn_opts |= TCPCHK_OPT_SEND_PROXY;
else if (strcmp(args[cur_arg], "via-socks4") == 0)
conn_opts |= TCPCHK_OPT_SOCKS4;
else if (strcmp(args[cur_arg], "linger") == 0)
conn_opts |= TCPCHK_OPT_LINGER;
#ifdef USE_OPENSSL
else if (strcmp(args[cur_arg], "ssl") == 0) {
px->options |= PR_O_TCPCHK_SSL;
conn_opts |= TCPCHK_OPT_SSL;
}
else if (strcmp(args[cur_arg], "sni") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
goto error;
}
cur_arg++;
free(sni);
sni = strdup(args[cur_arg]);
if (!sni) {
memprintf(errmsg, "out of memory");
goto error;
}
}
else if (strcmp(args[cur_arg], "alpn") == 0) {
#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
free(alpn);
if (ssl_sock_parse_alpn(args[cur_arg + 1], &alpn, &alpn_len, errmsg)) {
memprintf(errmsg, "'%s' : %s", args[cur_arg], *errmsg);
goto error;
}
cur_arg++;
#else
memprintf(errmsg, "'%s' : library does not support TLS ALPN extension.", args[cur_arg]);
goto error;
#endif
}
#endif /* USE_OPENSSL */
else {
memprintf(errmsg, "expects 'comment', 'port', 'addr', 'send-proxy'"
#ifdef USE_OPENSSL
", 'ssl', 'sni', 'alpn'"
#endif /* USE_OPENSSL */
" or 'via-socks4', 'linger', 'default' but got '%s' as argument.",
args[cur_arg]);
goto error;
}
cur_arg++;
}
chk = calloc(1, sizeof(*chk));
if (!chk) {
memprintf(errmsg, "out of memory");
goto error;
}
chk->action = TCPCHK_ACT_CONNECT;
chk->comment = comment;
chk->connect.port = port;
chk->connect.options = conn_opts;
chk->connect.sni = sni;
chk->connect.alpn = alpn;
chk->connect.alpn_len= alpn_len;
chk->connect.port_expr= port_expr;
chk->connect.mux_proto= mux_proto;
if (sk)
chk->connect.addr = *sk;
return chk;
error:
free(alpn);
free(sni);
free(comment);
release_sample_expr(port_expr);
return NULL;
}
/* Parses and creates a tcp-check send rule. NULL is returned on error */
struct tcpcheck_rule *parse_tcpcheck_send(char **args, int cur_arg, struct proxy *px, struct list *rules,
const char *file, int line, char **errmsg)
{
struct tcpcheck_rule *chk = NULL;
char *comment = NULL, *data = NULL;
enum tcpcheck_send_type type = TCPCHK_SEND_UNDEF;
if (strcmp(args[cur_arg], "send-binary-lf") == 0)
type = TCPCHK_SEND_BINARY_LF;
else if (strcmp(args[cur_arg], "send-binary") == 0)
type = TCPCHK_SEND_BINARY;
else if (strcmp(args[cur_arg], "send-lf") == 0)
type = TCPCHK_SEND_STRING_LF;
else if (strcmp(args[cur_arg], "send") == 0)
type = TCPCHK_SEND_STRING;
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a %s as argument",
(type == TCPCHK_SEND_BINARY ? "binary string": "string"), args[cur_arg]);
goto error;
}
data = args[cur_arg+1];
cur_arg += 2;
while (*(args[cur_arg])) {
if (strcmp(args[cur_arg], "comment") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
goto error;
}
cur_arg++;
free(comment);
comment = strdup(args[cur_arg]);
if (!comment) {
memprintf(errmsg, "out of memory");
goto error;
}
}
else {
memprintf(errmsg, "expects 'comment' but got '%s' as argument.",
args[cur_arg]);
goto error;
}
cur_arg++;
}
chk = calloc(1, sizeof(*chk));
if (!chk) {
memprintf(errmsg, "out of memory");
goto error;
}
chk->action = TCPCHK_ACT_SEND;
chk->comment = comment;
chk->send.type = type;
switch (chk->send.type) {
case TCPCHK_SEND_STRING:
chk->send.data = ist2(strdup(data), strlen(data));
if (!isttest(chk->send.data)) {
memprintf(errmsg, "out of memory");
goto error;
}
break;
case TCPCHK_SEND_BINARY: {
int len = chk->send.data.len;
if (parse_binary(data, &chk->send.data.ptr, &len, errmsg) == 0) {
memprintf(errmsg, "'%s' invalid binary string (%s).\n", data, *errmsg);
goto error;
}
chk->send.data.len = len;
break;
}
case TCPCHK_SEND_STRING_LF:
case TCPCHK_SEND_BINARY_LF:
LIST_INIT(&chk->send.fmt);
px->conf.args.ctx = ARGC_SRV;
if (!parse_logformat_string(data, px, &chk->send.fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
memprintf(errmsg, "'%s' invalid log-format string (%s).\n", data, *errmsg);
goto error;
}
break;
case TCPCHK_SEND_HTTP:
case TCPCHK_SEND_UNDEF:
goto error;
}
return chk;
error:
free(chk);
free(comment);
return NULL;
}
/* Parses and creates a http-check send rule. NULL is returned on error */
struct tcpcheck_rule *parse_tcpcheck_send_http(char **args, int cur_arg, struct proxy *px, struct list *rules,
const char *file, int line, char **errmsg)
{
struct tcpcheck_rule *chk = NULL;
struct tcpcheck_http_hdr *hdr = NULL;
struct http_hdr hdrs[global.tune.max_http_hdr];
char *meth = NULL, *uri = NULL, *vsn = NULL;
char *body = NULL, *comment = NULL;
unsigned int flags = 0;
int i = 0, host_hdr = -1;
cur_arg++;
while (*(args[cur_arg])) {
if (strcmp(args[cur_arg], "meth") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
goto error;
}
cur_arg++;
meth = args[cur_arg];
}
else if (strcmp(args[cur_arg], "uri") == 0 || strcmp(args[cur_arg], "uri-lf") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
goto error;
}
flags &= ~TCPCHK_SND_HTTP_FL_URI_FMT;
if (strcmp(args[cur_arg], "uri-lf") == 0)
flags |= TCPCHK_SND_HTTP_FL_URI_FMT;
cur_arg++;
uri = args[cur_arg];
}
else if (strcmp(args[cur_arg], "ver") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
goto error;
}
cur_arg++;
vsn = args[cur_arg];
}
else if (strcmp(args[cur_arg], "hdr") == 0) {
if (!*args[cur_arg+1] || !*args[cur_arg+2]) {
memprintf(errmsg, "'%s' expects <name> and <value> as arguments", args[cur_arg]);
goto error;
}
if (strcasecmp(args[cur_arg+1], "host") == 0) {
if (host_hdr >= 0) {
memprintf(errmsg, "'%s' header already defined (previous value is '%s')",
args[cur_arg+1], istptr(hdrs[host_hdr].v));
goto error;
}
host_hdr = i;
}
else if (strcasecmp(args[cur_arg+1], "connection") == 0 ||
strcasecmp(args[cur_arg+1], "content-length") == 0 ||
strcasecmp(args[cur_arg+1], "transfer-encoding") == 0)
goto skip_hdr;
hdrs[i].n = ist2(args[cur_arg+1], strlen(args[cur_arg+1]));
hdrs[i].v = ist2(args[cur_arg+2], strlen(args[cur_arg+2]));
i++;
skip_hdr:
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "body") == 0 || strcmp(args[cur_arg], "body-lf") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
goto error;
}
flags &= ~TCPCHK_SND_HTTP_FL_BODY_FMT;
if (strcmp(args[cur_arg], "body-lf") == 0)
flags |= TCPCHK_SND_HTTP_FL_BODY_FMT;
cur_arg++;
body = args[cur_arg];
}
else if (strcmp(args[cur_arg], "comment") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
goto error;
}
cur_arg++;
free(comment);
comment = strdup(args[cur_arg]);
if (!comment) {
memprintf(errmsg, "out of memory");
goto error;
}
}
else {
memprintf(errmsg, "expects 'comment', 'meth', 'uri', 'uri-lf', 'ver', 'hdr', 'body' or 'body-lf'"
" but got '%s' as argument.", args[cur_arg]);
goto error;
}
cur_arg++;
}
hdrs[i].n = hdrs[i].v = IST_NULL;
chk = calloc(1, sizeof(*chk));
if (!chk) {
memprintf(errmsg, "out of memory");
goto error;
}
chk->action = TCPCHK_ACT_SEND;
chk->comment = comment; comment = NULL;
chk->send.type = TCPCHK_SEND_HTTP;
chk->send.http.flags = flags;
LIST_INIT(&chk->send.http.hdrs);
if (meth) {
chk->send.http.meth.meth = find_http_meth(meth, strlen(meth));
chk->send.http.meth.str.area = strdup(meth);
chk->send.http.meth.str.data = strlen(meth);
if (!chk->send.http.meth.str.area) {
memprintf(errmsg, "out of memory");
goto error;
}
}
if (uri) {
if (chk->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) {
LIST_INIT(&chk->send.http.uri_fmt);
px->conf.args.ctx = ARGC_SRV;
if (!parse_logformat_string(uri, px, &chk->send.http.uri_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
memprintf(errmsg, "'%s' invalid log-format string (%s).\n", uri, *errmsg);
goto error;
}
}
else {
chk->send.http.uri = ist2(strdup(uri), strlen(uri));
if (!isttest(chk->send.http.uri)) {
memprintf(errmsg, "out of memory");
goto error;
}
}
}
if (vsn) {
chk->send.http.vsn = ist2(strdup(vsn), strlen(vsn));
if (!isttest(chk->send.http.vsn)) {
memprintf(errmsg, "out of memory");
goto error;
}
}
for (i = 0; istlen(hdrs[i].n); i++) {
hdr = calloc(1, sizeof(*hdr));
if (!hdr) {
memprintf(errmsg, "out of memory");
goto error;
}
LIST_INIT(&hdr->value);
hdr->name = istdup(hdrs[i].n);
if (!isttest(hdr->name)) {
memprintf(errmsg, "out of memory");
goto error;
}
ist0(hdrs[i].v);
if (!parse_logformat_string(istptr(hdrs[i].v), px, &hdr->value, 0, SMP_VAL_BE_CHK_RUL, errmsg))
goto error;
LIST_ADDQ(&chk->send.http.hdrs, &hdr->list);
hdr = NULL;
}
if (body) {
if (chk->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) {
LIST_INIT(&chk->send.http.body_fmt);
px->conf.args.ctx = ARGC_SRV;
if (!parse_logformat_string(body, px, &chk->send.http.body_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
memprintf(errmsg, "'%s' invalid log-format string (%s).\n", body, *errmsg);
goto error;
}
}
else {
chk->send.http.body = ist2(strdup(body), strlen(body));
if (!isttest(chk->send.http.body)) {
memprintf(errmsg, "out of memory");
goto error;
}
}
}
return chk;
error:
free_tcpcheck_http_hdr(hdr);
free_tcpcheck(chk, 0);
free(comment);
return NULL;
}
/* Parses and creates a http-check comment rule. NULL is returned on error */
struct tcpcheck_rule *parse_tcpcheck_comment(char **args, int cur_arg, struct proxy *px, struct list *rules,
const char *file, int line, char **errmsg)
{
struct tcpcheck_rule *chk = NULL;
char *comment = NULL;
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "expects a string as argument");
goto error;
}
cur_arg++;
comment = strdup(args[cur_arg]);
if (!comment) {
memprintf(errmsg, "out of memory");
goto error;
}
chk = calloc(1, sizeof(*chk));
if (!chk) {
memprintf(errmsg, "out of memory");
goto error;
}
chk->action = TCPCHK_ACT_COMMENT;
chk->comment = comment;
return chk;
error:
free(comment);
return NULL;
}
/* Parses and creates a tcp-check or an http-check expect rule. NULL is returned
* on error. <proto> is set to the right protocol flags (covered by the
* TCPCHK_RULES_PROTO_CHK mask).
*/
struct tcpcheck_rule *parse_tcpcheck_expect(char **args, int cur_arg, struct proxy *px,
struct list *rules, unsigned int proto,
const char *file, int line, char **errmsg)
{
struct tcpcheck_rule *prev_check, *chk = NULL;
struct sample_expr *status_expr = NULL;
char *on_success_msg, *on_error_msg, *comment, *pattern, *npat, *vpat;
enum tcpcheck_expect_type type = TCPCHK_EXPECT_UNDEF;
enum healthcheck_status ok_st = HCHK_STATUS_UNKNOWN;
enum healthcheck_status err_st = HCHK_STATUS_UNKNOWN;
enum healthcheck_status tout_st = HCHK_STATUS_UNKNOWN;
unsigned int flags = 0;
long min_recv = -1;
int inverse = 0;
on_success_msg = on_error_msg = comment = pattern = npat = vpat = NULL;
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "expects at least a matching pattern as arguments");
goto error;
}
cur_arg++;
while (*(args[cur_arg])) {
int in_pattern = 0;
rescan:
if (strcmp(args[cur_arg], "min-recv") == 0) {
if (in_pattern) {
memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
goto error;
}
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a integer as argument", args[cur_arg]);
goto error;
}
/* Use an signed integer here because of chksize */
cur_arg++;
min_recv = atol(args[cur_arg]);
if (min_recv < -1 || min_recv > INT_MAX) {
memprintf(errmsg, "'%s' expects -1 or an integer from 0 to INT_MAX" , args[cur_arg-1]);
goto error;
}
}
else if (*(args[cur_arg]) == '!') {
in_pattern = 1;
while (*(args[cur_arg]) == '!') {
inverse = !inverse;
args[cur_arg]++;
}
if (!*(args[cur_arg]))
cur_arg++;
goto rescan;
}
else if (strcmp(args[cur_arg], "string") == 0 || strcmp(args[cur_arg], "rstring") == 0) {
if (type != TCPCHK_EXPECT_UNDEF) {
memprintf(errmsg, "only on pattern expected");
goto error;
}
if (proto != TCPCHK_RULES_HTTP_CHK)
type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_STRING : TCPCHK_EXPECT_STRING_REGEX);
else
type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_HTTP_BODY : TCPCHK_EXPECT_HTTP_BODY_REGEX);
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
goto error;
}
cur_arg++;
pattern = args[cur_arg];
}
else if (strcmp(args[cur_arg], "binary") == 0 || strcmp(args[cur_arg], "rbinary") == 0) {
if (proto == TCPCHK_RULES_HTTP_CHK)
goto bad_http_kw;
if (type != TCPCHK_EXPECT_UNDEF) {
memprintf(errmsg, "only on pattern expected");
goto error;
}
type = ((*(args[cur_arg]) == 'b') ? TCPCHK_EXPECT_BINARY : TCPCHK_EXPECT_BINARY_REGEX);
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
goto error;
}
cur_arg++;
pattern = args[cur_arg];
}
else if (strcmp(args[cur_arg], "string-lf") == 0 || strcmp(args[cur_arg], "binary-lf") == 0) {
if (type != TCPCHK_EXPECT_UNDEF) {
memprintf(errmsg, "only on pattern expected");
goto error;
}
if (proto != TCPCHK_RULES_HTTP_CHK)
type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_STRING_LF : TCPCHK_EXPECT_BINARY_LF);
else {
if (*(args[cur_arg]) != 's')
goto bad_http_kw;
type = TCPCHK_EXPECT_HTTP_BODY_LF;
}
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
goto error;
}
cur_arg++;
pattern = args[cur_arg];
}
else if (strcmp(args[cur_arg], "status") == 0 || strcmp(args[cur_arg], "rstatus") == 0) {
if (proto != TCPCHK_RULES_HTTP_CHK)
goto bad_tcp_kw;
if (type != TCPCHK_EXPECT_UNDEF) {
memprintf(errmsg, "only on pattern expected");
goto error;
}
type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_HTTP_STATUS : TCPCHK_EXPECT_HTTP_STATUS_REGEX);
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
goto error;
}
cur_arg++;
pattern = args[cur_arg];
}
else if (strcmp(args[cur_arg], "custom") == 0) {
if (in_pattern) {
memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
goto error;
}
if (type != TCPCHK_EXPECT_UNDEF) {
memprintf(errmsg, "only on pattern expected");
goto error;
}
type = TCPCHK_EXPECT_CUSTOM;
}
else if (strcmp(args[cur_arg], "hdr") == 0 || strcmp(args[cur_arg], "fhdr") == 0) {
int orig_arg = cur_arg;
if (proto != TCPCHK_RULES_HTTP_CHK)
goto bad_tcp_kw;
if (type != TCPCHK_EXPECT_UNDEF) {
memprintf(errmsg, "only on pattern expected");
goto error;
}
type = TCPCHK_EXPECT_HTTP_HEADER;
if (strcmp(args[cur_arg], "fhdr") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HVAL_FULL;
/* Parse the name pattern, mandatory */
if (!*(args[cur_arg+1]) || !*(args[cur_arg+2]) ||
(strcmp(args[cur_arg+1], "name") != 0 && strcmp(args[cur_arg+1], "name-lf") != 0)) {
memprintf(errmsg, "'%s' expects at the name keyword as first argument followed by a pattern",
args[orig_arg]);
goto error;
}
if (strcmp(args[cur_arg+1], "name-lf") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HNAME_FMT;
cur_arg += 2;
if (strcmp(args[cur_arg], "-m") == 0) {
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' : '%s' expects at a matching pattern ('str', 'beg', 'end', 'sub' or 'reg')",
args[orig_arg], args[cur_arg]);
goto error;
}
if (strcmp(args[cur_arg+1], "str") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HNAME_STR;
else if (strcmp(args[cur_arg+1], "beg") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HNAME_BEG;
else if (strcmp(args[cur_arg+1], "end") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HNAME_END;
else if (strcmp(args[cur_arg+1], "sub") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HNAME_SUB;
else if (strcmp(args[cur_arg+1], "reg") == 0) {
if (flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT) {
memprintf(errmsg, "'%s': log-format string is not supported with a regex matching method",
args[orig_arg]);
goto error;
}
flags |= TCPCHK_EXPT_FL_HTTP_HNAME_REG;
}
else {
memprintf(errmsg, "'%s' : '%s' only supports 'str', 'beg', 'end', 'sub' or 'reg' (got '%s')",
args[orig_arg], args[cur_arg], args[cur_arg+1]);
goto error;
}
cur_arg += 2;
}
else
flags |= TCPCHK_EXPT_FL_HTTP_HNAME_STR;
npat = args[cur_arg];
if (!*(args[cur_arg+1]) ||
(strcmp(args[cur_arg+1], "value") != 0 && strcmp(args[cur_arg+1], "value-lf") != 0)) {
flags |= TCPCHK_EXPT_FL_HTTP_HVAL_NONE;
goto next;
}
if (strcmp(args[cur_arg+1], "value-lf") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HVAL_FMT;
/* Parse the value pattern, optional */
if (strcmp(args[cur_arg+2], "-m") == 0) {
cur_arg += 2;
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' : '%s' expects at a matching pattern ('str', 'beg', 'end', 'sub' or 'reg')",
args[orig_arg], args[cur_arg]);
goto error;
}
if (strcmp(args[cur_arg+1], "str") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HVAL_STR;
else if (strcmp(args[cur_arg+1], "beg") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HVAL_BEG;
else if (strcmp(args[cur_arg+1], "end") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HVAL_END;
else if (strcmp(args[cur_arg+1], "sub") == 0)
flags |= TCPCHK_EXPT_FL_HTTP_HVAL_SUB;
else if (strcmp(args[cur_arg+1], "reg") == 0) {
if (flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT) {
memprintf(errmsg, "'%s': log-format string is not supported with a regex matching method",
args[orig_arg]);
goto error;
}
flags |= TCPCHK_EXPT_FL_HTTP_HVAL_REG;
}
else {
memprintf(errmsg, "'%s' : '%s' only supports 'str', 'beg', 'end', 'sub' or 'reg' (got '%s')",
args[orig_arg], args[cur_arg], args[cur_arg+1]);
goto error;
}
}
else
flags |= TCPCHK_EXPT_FL_HTTP_HVAL_STR;
if (!*(args[cur_arg+2])) {
memprintf(errmsg, "'%s' expect a pattern with the value keyword", args[orig_arg]);
goto error;
}
vpat = args[cur_arg+2];
cur_arg += 2;
}
else if (strcmp(args[cur_arg], "comment") == 0) {
if (in_pattern) {
memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
goto error;
}
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
goto error;
}
cur_arg++;
free(comment);
comment = strdup(args[cur_arg]);
if (!comment) {
memprintf(errmsg, "out of memory");
goto error;
}
}
else if (strcmp(args[cur_arg], "on-success") == 0) {
if (in_pattern) {
memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
goto error;
}
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
goto error;
}
cur_arg++;
on_success_msg = args[cur_arg];
}
else if (strcmp(args[cur_arg], "on-error") == 0) {
if (in_pattern) {
memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
goto error;
}
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
goto error;
}
cur_arg++;
on_error_msg = args[cur_arg];
}
else if (strcmp(args[cur_arg], "ok-status") == 0) {
if (in_pattern) {
memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
goto error;
}
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
goto error;
}
if (strcasecmp(args[cur_arg+1], "L7OK") == 0)
ok_st = HCHK_STATUS_L7OKD;
else if (strcasecmp(args[cur_arg+1], "L7OKC") == 0)
ok_st = HCHK_STATUS_L7OKCD;
else if (strcasecmp(args[cur_arg+1], "L6OK") == 0)
ok_st = HCHK_STATUS_L6OK;
else if (strcasecmp(args[cur_arg+1], "L4OK") == 0)
ok_st = HCHK_STATUS_L4OK;
else {
memprintf(errmsg, "'%s' only supports 'L4OK', 'L6OK', 'L7OK' or 'L7OKC' status (got '%s').",
args[cur_arg], args[cur_arg+1]);
goto error;
}
cur_arg++;
}
else if (strcmp(args[cur_arg], "error-status") == 0) {
if (in_pattern) {
memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
goto error;
}
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
goto error;
}
if (strcasecmp(args[cur_arg+1], "L7RSP") == 0)
err_st = HCHK_STATUS_L7RSP;
else if (strcasecmp(args[cur_arg+1], "L7STS") == 0)
err_st = HCHK_STATUS_L7STS;
else if (strcasecmp(args[cur_arg+1], "L6RSP") == 0)
err_st = HCHK_STATUS_L6RSP;
else if (strcasecmp(args[cur_arg+1], "L4CON") == 0)
err_st = HCHK_STATUS_L4CON;
else {
memprintf(errmsg, "'%s' only supports 'L4CON', 'L6RSP', 'L7RSP' or 'L7STS' status (got '%s').",
args[cur_arg], args[cur_arg+1]);
goto error;
}
cur_arg++;
}
else if (strcmp(args[cur_arg], "status-code") == 0) {
int idx = 0;
if (in_pattern) {
memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
goto error;
}
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects an expression as argument", args[cur_arg]);
goto error;
}
cur_arg++;
release_sample_expr(status_expr);
px->conf.args.ctx = ARGC_SRV;
status_expr = sample_parse_expr((char *[]){args[cur_arg], NULL}, &idx,
file, line, errmsg, &px->conf.args, NULL);
if (!status_expr) {
memprintf(errmsg, "error detected while parsing status-code expression : %s", *errmsg);
goto error;
}
if (!(status_expr->fetch->val & SMP_VAL_BE_CHK_RUL)) {
memprintf(errmsg, "error detected while parsing status-code expression : "
" fetch method '%s' extracts information from '%s', "
"none of which is available here.\n",
args[cur_arg], sample_src_names(status_expr->fetch->use));
goto error;
}
px->http_needed |= !!(status_expr->fetch->use & SMP_USE_HTTP_ANY);
}
else if (strcmp(args[cur_arg], "tout-status") == 0) {
if (in_pattern) {
memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
goto error;
}
if (!*(args[cur_arg+1])) {
memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
goto error;
}
if (strcasecmp(args[cur_arg+1], "L7TOUT") == 0)
tout_st = HCHK_STATUS_L7TOUT;
else if (strcasecmp(args[cur_arg+1], "L6TOUT") == 0)
tout_st = HCHK_STATUS_L6TOUT;
else if (strcasecmp(args[cur_arg+1], "L4TOUT") == 0)
tout_st = HCHK_STATUS_L4TOUT;
else {
memprintf(errmsg, "'%s' only supports 'L4TOUT', 'L6TOUT' or 'L7TOUT' status (got '%s').",
args[cur_arg], args[cur_arg+1]);
goto error;
}
cur_arg++;
}
else {
if (proto == TCPCHK_RULES_HTTP_CHK) {
bad_http_kw:
memprintf(errmsg, "'only supports min-recv, [!]string', '[!]rstring', '[!]string-lf', '[!]status', "
"'[!]rstatus', [!]hdr, [!]fhdr or comment but got '%s' as argument.", args[cur_arg]);
}
else {
bad_tcp_kw:
memprintf(errmsg, "'only supports min-recv, '[!]binary', '[!]string', '[!]rstring', '[!]string-lf'"
"'[!]rbinary', '[!]binary-lf' or comment but got '%s' as argument.", args[cur_arg]);
}
goto error;
}
next:
cur_arg++;
}
chk = calloc(1, sizeof(*chk));
if (!chk) {
memprintf(errmsg, "out of memory");
goto error;
}
chk->action = TCPCHK_ACT_EXPECT;
LIST_INIT(&chk->expect.onerror_fmt);
LIST_INIT(&chk->expect.onsuccess_fmt);
chk->comment = comment; comment = NULL;
chk->expect.type = type;
chk->expect.min_recv = min_recv;
chk->expect.flags = flags | (inverse ? TCPCHK_EXPT_FL_INV : 0);
chk->expect.ok_status = ok_st;
chk->expect.err_status = err_st;
chk->expect.tout_status = tout_st;
chk->expect.status_expr = status_expr; status_expr = NULL;
if (on_success_msg) {
px->conf.args.ctx = ARGC_SRV;
if (!parse_logformat_string(on_success_msg, px, &chk->expect.onsuccess_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
memprintf(errmsg, "'%s' invalid log-format string (%s).\n", on_success_msg, *errmsg);
goto error;
}
}
if (on_error_msg) {
px->conf.args.ctx = ARGC_SRV;
if (!parse_logformat_string(on_error_msg, px, &chk->expect.onerror_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
memprintf(errmsg, "'%s' invalid log-format string (%s).\n", on_error_msg, *errmsg);
goto error;
}
}
switch (chk->expect.type) {
case TCPCHK_EXPECT_HTTP_STATUS: {
const char *p = pattern;
unsigned int c1,c2;
chk->expect.codes.codes = NULL;
chk->expect.codes.num = 0;
while (1) {
c1 = c2 = read_uint(&p, pattern + strlen(pattern));
if (*p == '-') {
p++;
c2 = read_uint(&p, pattern + strlen(pattern));
}
if (c1 > c2) {
memprintf(errmsg, "invalid range of status codes '%s'", pattern);
goto error;
}
chk->expect.codes.num++;
chk->expect.codes.codes = my_realloc2(chk->expect.codes.codes,
chk->expect.codes.num * sizeof(*chk->expect.codes.codes));
if (!chk->expect.codes.codes) {
memprintf(errmsg, "out of memory");
goto error;
}
chk->expect.codes.codes[chk->expect.codes.num-1][0] = c1;
chk->expect.codes.codes[chk->expect.codes.num-1][1] = c2;
if (*p == '\0')
break;
if (*p != ',') {
memprintf(errmsg, "invalid character '%c' in the list of status codes", *p);
goto error;
}
p++;
}
break;
}
case TCPCHK_EXPECT_STRING:
case TCPCHK_EXPECT_HTTP_BODY:
chk->expect.data = ist2(strdup(pattern), strlen(pattern));
if (!isttest(chk->expect.data)) {
memprintf(errmsg, "out of memory");
goto error;
}
break;
case TCPCHK_EXPECT_BINARY: {
int len = chk->expect.data.len;
if (parse_binary(pattern, &chk->expect.data.ptr, &len, errmsg) == 0) {
memprintf(errmsg, "invalid binary string (%s)", *errmsg);
goto error;
}
chk->expect.data.len = len;
break;
}
case TCPCHK_EXPECT_STRING_REGEX:
case TCPCHK_EXPECT_BINARY_REGEX:
case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
case TCPCHK_EXPECT_HTTP_BODY_REGEX:
chk->expect.regex = regex_comp(pattern, 1, 0, errmsg);
if (!chk->expect.regex)
goto error;
break;
case TCPCHK_EXPECT_STRING_LF:
case TCPCHK_EXPECT_BINARY_LF:
case TCPCHK_EXPECT_HTTP_BODY_LF:
LIST_INIT(&chk->expect.fmt);
px->conf.args.ctx = ARGC_SRV;
if (!parse_logformat_string(pattern, px, &chk->expect.fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
memprintf(errmsg, "'%s' invalid log-format string (%s).\n", pattern, *errmsg);
goto error;
}
break;
case TCPCHK_EXPECT_HTTP_HEADER:
if (!npat) {
memprintf(errmsg, "unexpected error, undefined header name pattern");
goto error;
}
if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_REG) {
chk->expect.hdr.name_re = regex_comp(npat, 0, 0, errmsg);
if (!chk->expect.hdr.name_re)
goto error;
}
else if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT) {
px->conf.args.ctx = ARGC_SRV;
LIST_INIT(&chk->expect.hdr.name_fmt);
if (!parse_logformat_string(npat, px, &chk->expect.hdr.name_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
memprintf(errmsg, "'%s' invalid log-format string (%s).\n", npat, *errmsg);
goto error;
}
}
else {
chk->expect.hdr.name = ist2(strdup(npat), strlen(npat));
if (!isttest(chk->expect.hdr.name)) {
memprintf(errmsg, "out of memory");
goto error;
}
}
if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_NONE) {
chk->expect.hdr.value = IST_NULL;
break;
}
if (!vpat) {
memprintf(errmsg, "unexpected error, undefined header value pattern");
goto error;
}
else if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_REG) {
chk->expect.hdr.value_re = regex_comp(vpat, 1, 0, errmsg);
if (!chk->expect.hdr.value_re)
goto error;
}
else if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT) {
px->conf.args.ctx = ARGC_SRV;
LIST_INIT(&chk->expect.hdr.value_fmt);
if (!parse_logformat_string(vpat, px, &chk->expect.hdr.value_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
memprintf(errmsg, "'%s' invalid log-format string (%s).\n", npat, *errmsg);
goto error;
}
}
else {
chk->expect.hdr.value = ist2(strdup(vpat), strlen(vpat));
if (!isttest(chk->expect.hdr.value)) {
memprintf(errmsg, "out of memory");
goto error;
}
}
break;
case TCPCHK_EXPECT_CUSTOM:
chk->expect.custom = NULL; /* Must be defined by the caller ! */
break;
case TCPCHK_EXPECT_UNDEF:
memprintf(errmsg, "pattern not found");
goto error;
}
/* All tcp-check expect points back to the first inverse expect rule in
* a chain of one or more expect rule, potentially itself.
*/
chk->expect.head = chk;
list_for_each_entry_rev(prev_check, rules, list) {
if (prev_check->action == TCPCHK_ACT_EXPECT) {
if (prev_check->expect.flags & TCPCHK_EXPT_FL_INV)
chk->expect.head = prev_check;
continue;
}
if (prev_check->action != TCPCHK_ACT_COMMENT && prev_check->action != TCPCHK_ACT_ACTION_KW)
break;
}
return chk;
error:
free_tcpcheck(chk, 0);
free(comment);
release_sample_expr(status_expr);
return NULL;
}
/* Overwrites fields of the old http send rule with those of the new one. When
* replaced, old values are freed and replaced by the new ones. New values are
* not copied but transferred. At the end <new> should be empty and can be
* safely released. This function never fails.
*/
void tcpcheck_overwrite_send_http_rule(struct tcpcheck_rule *old, struct tcpcheck_rule *new)
{
struct logformat_node *lf, *lfb;
struct tcpcheck_http_hdr *hdr, *bhdr;
if (new->send.http.meth.str.area) {
free(old->send.http.meth.str.area);
old->send.http.meth.meth = new->send.http.meth.meth;
old->send.http.meth.str.area = new->send.http.meth.str.area;
old->send.http.meth.str.data = new->send.http.meth.str.data;
new->send.http.meth.str = BUF_NULL;
}
if (!(new->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) && isttest(new->send.http.uri)) {
if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT))
istfree(&old->send.http.uri);
else
free_tcpcheck_fmt(&old->send.http.uri_fmt);
old->send.http.flags &= ~TCPCHK_SND_HTTP_FL_URI_FMT;
old->send.http.uri = new->send.http.uri;
new->send.http.uri = IST_NULL;
}
else if ((new->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) && !LIST_ISEMPTY(&new->send.http.uri_fmt)) {
if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT))
istfree(&old->send.http.uri);
else
free_tcpcheck_fmt(&old->send.http.uri_fmt);
old->send.http.flags |= TCPCHK_SND_HTTP_FL_URI_FMT;
LIST_INIT(&old->send.http.uri_fmt);
list_for_each_entry_safe(lf, lfb, &new->send.http.uri_fmt, list) {
LIST_DEL(&lf->list);
LIST_ADDQ(&old->send.http.uri_fmt, &lf->list);
}
}
if (isttest(new->send.http.vsn)) {
istfree(&old->send.http.vsn);
old->send.http.vsn = new->send.http.vsn;
new->send.http.vsn = IST_NULL;
}
free_tcpcheck_http_hdrs(&old->send.http.hdrs);
list_for_each_entry_safe(hdr, bhdr, &new->send.http.hdrs, list) {
LIST_DEL(&hdr->list);
LIST_ADDQ(&old->send.http.hdrs, &hdr->list);
}
if (!(new->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) && isttest(new->send.http.body)) {
if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT))
istfree(&old->send.http.body);
else
free_tcpcheck_fmt(&old->send.http.body_fmt);
old->send.http.flags &= ~TCPCHK_SND_HTTP_FL_BODY_FMT;
old->send.http.body = new->send.http.body;
new->send.http.body = IST_NULL;
}
else if ((new->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) && !LIST_ISEMPTY(&new->send.http.body_fmt)) {
if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT))
istfree(&old->send.http.body);
else
free_tcpcheck_fmt(&old->send.http.body_fmt);
old->send.http.flags |= TCPCHK_SND_HTTP_FL_BODY_FMT;
LIST_INIT(&old->send.http.body_fmt);
list_for_each_entry_safe(lf, lfb, &new->send.http.body_fmt, list) {
LIST_DEL(&lf->list);
LIST_ADDQ(&old->send.http.body_fmt, &lf->list);
}
}
}
/* Internal function used to add an http-check rule in a list during the config
* parsing step. Depending on its type, and the previously inserted rules, a
* specific action may be performed or an error may be reported. This functions
* returns 1 on success and 0 on error and <errmsg> is filled with the error
* message.
*/
int tcpcheck_add_http_rule(struct tcpcheck_rule *chk, struct tcpcheck_rules *rules, char **errmsg)
{
struct tcpcheck_rule *r;
/* the implicit send rule coming from an "option httpchk" line must be
* merged with the first explici http-check send rule, if
* any. Depending on the declaration order some tests are required.
*
* Some tests are also required for other kinds of http-check rules to be
* sure the ruleset remains valid.
*/
if (chk->action == TCPCHK_ACT_SEND && (chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) {
/* Tries to add an implicit http-check send rule from an "option httpchk" line.
* First, the first rule is retrieved, skipping the first CONNECT, if any, and
* following tests are performed :
*
* 1- If there is no such rule or if it is not a send rule, the implicit send
* rule is pushed in front of the ruleset
*
* 2- If it is another implicit send rule, it is replaced with the new one.
*
* 3- Otherwise, it means it is an explicit send rule. In this case we merge
* both, overwriting the old send rule (the explicit one) with info of the
* new send rule (the implicit one).
*/
r = get_first_tcpcheck_rule(rules);
if (r && r->action == TCPCHK_ACT_CONNECT)
r = get_next_tcpcheck_rule(rules, r);
if (!r || r->action != TCPCHK_ACT_SEND)
LIST_ADD(rules->list, &chk->list);
else if (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT) {
LIST_DEL(&r->list);
free_tcpcheck(r, 0);
LIST_ADD(rules->list, &chk->list);
}
else {
tcpcheck_overwrite_send_http_rule(r, chk);
free_tcpcheck(chk, 0);
}
}
else {
/* Tries to add an explicit http-check rule. First of all we check the typefo the
* last inserted rule to be sure it is valid. Then for send rule, we try to merge it
* with an existing implicit send rule, if any. At the end, if there is no error,
* the rule is appended to the list.
*/
r = get_last_tcpcheck_rule(rules);
if (!r || (r->action == TCPCHK_ACT_SEND && (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)))
/* no error */;
else if (r->action != TCPCHK_ACT_CONNECT && chk->action == TCPCHK_ACT_SEND) {
memprintf(errmsg, "unable to add http-check send rule at step %d (missing connect rule).",
chk->index+1);
return 0;
}
else if (r->action != TCPCHK_ACT_SEND && r->action != TCPCHK_ACT_EXPECT && chk->action == TCPCHK_ACT_EXPECT) {
memprintf(errmsg, "unable to add http-check expect rule at step %d (missing send rule).",
chk->index+1);
return 0;
}
else if (r->action != TCPCHK_ACT_EXPECT && chk->action == TCPCHK_ACT_CONNECT) {
memprintf(errmsg, "unable to add http-check connect rule at step %d (missing expect rule).",
chk->index+1);
return 0;
}
if (chk->action == TCPCHK_ACT_SEND) {
r = get_first_tcpcheck_rule(rules);
if (r && r->action == TCPCHK_ACT_SEND && (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) {
tcpcheck_overwrite_send_http_rule(r, chk);
free_tcpcheck(chk, 0);
LIST_DEL(&r->list);
r->send.http.flags &= ~TCPCHK_SND_HTTP_FROM_OPT;
chk = r;
}
}
LIST_ADDQ(rules->list, &chk->list);
}
return 1;
}
/* Check tcp-check health-check configuration for the proxy <px>. */
static int check_proxy_tcpcheck(struct proxy *px)
{
struct tcpcheck_rule *chk, *back;
char *comment = NULL, *errmsg = NULL;
enum tcpcheck_rule_type prev_action = TCPCHK_ACT_COMMENT;
int ret = 0;
if (!(px->cap & PR_CAP_BE) || (px->options2 & PR_O2_CHK_ANY) != PR_O2_TCPCHK_CHK) {
deinit_proxy_tcpcheck(px);
goto out;
}
free(px->check_command);
free(px->check_path);
px->check_command = px->check_path = NULL;
if (!px->tcpcheck_rules.list) {
ha_alert("config : proxy '%s' : tcp-check configured but no ruleset defined.\n", px->id);
ret |= ERR_ALERT | ERR_FATAL;
goto out;
}
/* HTTP ruleset only : */
if ((px->tcpcheck_rules.flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK) {
struct tcpcheck_rule *next;
/* move remaining implicit send rule from "option httpchk" line to the right place.
* If such rule exists, it must be the first one. In this case, the rule is moved
* after the first connect rule, if any. Otherwise, nothing is done.
*/
chk = get_first_tcpcheck_rule(&px->tcpcheck_rules);
if (chk && chk->action == TCPCHK_ACT_SEND && (chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) {
next = get_next_tcpcheck_rule(&px->tcpcheck_rules, chk);
if (next && next->action == TCPCHK_ACT_CONNECT) {
LIST_DEL(&chk->list);
LIST_ADD(&next->list, &chk->list);
chk->index = next->index;
}
}
/* add implicit expect rule if the last one is a send. It is inherited from previous
* versions where the http expect rule was optional. Now it is possible to chained
* send/expect rules but the last expect may still be implicit.
*/
chk = get_last_tcpcheck_rule(&px->tcpcheck_rules);
if (chk && chk->action == TCPCHK_ACT_SEND) {
next = parse_tcpcheck_expect((char *[]){"http-check", "expect", "status", "200-399", ""},
1, px, px->tcpcheck_rules.list, TCPCHK_RULES_HTTP_CHK,
px->conf.file, px->conf.line, &errmsg);
if (!next) {
ha_alert("config : proxy '%s': unable to add implicit http-check expect rule "
"(%s).\n", px->id, errmsg);
free(errmsg);
ret |= ERR_ALERT | ERR_FATAL;
goto out;
}
LIST_ADDQ(px->tcpcheck_rules.list, &next->list);
next->index = chk->index;
}
}
/* For all ruleset: */
/* If there is no connect rule preceding all send / expect rules, an
* implicit one is inserted before all others.
*/
chk = get_first_tcpcheck_rule(&px->tcpcheck_rules);
if (!chk || chk->action != TCPCHK_ACT_CONNECT) {
chk = calloc(1, sizeof(*chk));
if (!chk) {
ha_alert("config : proxy '%s': unable to add implicit tcp-check connect rule "
"(out of memory).\n", px->id);
ret |= ERR_ALERT | ERR_FATAL;
goto out;
}
chk->action = TCPCHK_ACT_CONNECT;
chk->connect.options = (TCPCHK_OPT_DEFAULT_CONNECT|TCPCHK_OPT_IMPLICIT);
LIST_ADD(px->tcpcheck_rules.list, &chk->list);
}
/* Remove all comment rules. To do so, when a such rule is found, the
* comment is assigned to the following rule(s).
*/
list_for_each_entry_safe(chk, back, px->tcpcheck_rules.list, list) {
if (chk->action != prev_action && prev_action != TCPCHK_ACT_COMMENT) {
free(comment);
comment = NULL;
}
prev_action = chk->action;
switch (chk->action) {
case TCPCHK_ACT_COMMENT:
free(comment);
comment = chk->comment;
LIST_DEL(&chk->list);
free(chk);
break;
case TCPCHK_ACT_CONNECT:
if (!chk->comment && comment)
chk->comment = strdup(comment);
/* fall through */
case TCPCHK_ACT_ACTION_KW:
free(comment);
comment = NULL;
break;
case TCPCHK_ACT_SEND:
case TCPCHK_ACT_EXPECT:
if (!chk->comment && comment)
chk->comment = strdup(comment);
break;
}
}
free(comment);
comment = NULL;
out:
return ret;
}
void deinit_proxy_tcpcheck(struct proxy *px)
{
free_tcpcheck_vars(&px->tcpcheck_rules.preset_vars);
px->tcpcheck_rules.flags = 0;
px->tcpcheck_rules.list = NULL;
}
static void deinit_tcpchecks()
{
struct tcpcheck_ruleset *rs;
struct tcpcheck_rule *r, *rb;
struct ebpt_node *node, *next;
node = ebpt_first(&shared_tcpchecks);
while (node) {
next = ebpt_next(node);
ebpt_delete(node);
free(node->key);
rs = container_of(node, typeof(*rs), node);
list_for_each_entry_safe(r, rb, &rs->rules, list) {
LIST_DEL(&r->list);
free_tcpcheck(r, 0);
}
free(rs);
node = next;
}
}
int add_tcpcheck_expect_str(struct tcpcheck_rules *rules, const char *str)
{
struct tcpcheck_rule *tcpcheck, *prev_check;
struct tcpcheck_expect *expect;
if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
return 0;
memset(tcpcheck, 0, sizeof(*tcpcheck));
tcpcheck->action = TCPCHK_ACT_EXPECT;
expect = &tcpcheck->expect;
expect->type = TCPCHK_EXPECT_STRING;
LIST_INIT(&expect->onerror_fmt);
LIST_INIT(&expect->onsuccess_fmt);
expect->ok_status = HCHK_STATUS_L7OKD;
expect->err_status = HCHK_STATUS_L7RSP;
expect->tout_status = HCHK_STATUS_L7TOUT;
expect->data = ist2(strdup(str), strlen(str));
if (!isttest(expect->data)) {
pool_free(pool_head_tcpcheck_rule, tcpcheck);
return 0;
}
/* All tcp-check expect points back to the first inverse expect rule
* in a chain of one or more expect rule, potentially itself.
*/
tcpcheck->expect.head = tcpcheck;
list_for_each_entry_rev(prev_check, rules->list, list) {
if (prev_check->action == TCPCHK_ACT_EXPECT) {
if (prev_check->expect.flags & TCPCHK_EXPT_FL_INV)
tcpcheck->expect.head = prev_check;
continue;
}
if (prev_check->action != TCPCHK_ACT_COMMENT && prev_check->action != TCPCHK_ACT_ACTION_KW)
break;
}
LIST_ADDQ(rules->list, &tcpcheck->list);
return 1;
}
int add_tcpcheck_send_strs(struct tcpcheck_rules *rules, const char * const *strs)
{
struct tcpcheck_rule *tcpcheck;
struct tcpcheck_send *send;
const char *in;
char *dst;
int i;
if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
return 0;
memset(tcpcheck, 0, sizeof(*tcpcheck));
tcpcheck->action = TCPCHK_ACT_SEND;
send = &tcpcheck->send;
send->type = TCPCHK_SEND_STRING;
for (i = 0; strs[i]; i++)
send->data.len += strlen(strs[i]);
send->data.ptr = malloc(istlen(send->data) + 1);
if (!isttest(send->data)) {
pool_free(pool_head_tcpcheck_rule, tcpcheck);
return 0;
}
dst = istptr(send->data);
for (i = 0; strs[i]; i++)
for (in = strs[i]; (*dst = *in++); dst++);
*dst = 0;
LIST_ADDQ(rules->list, &tcpcheck->list);
return 1;
}
/* Parses the "tcp-check" proxy keyword */
static int proxy_parse_tcpcheck(char **args, int section, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **errmsg)
{
struct tcpcheck_ruleset *rs = NULL;
struct tcpcheck_rule *chk = NULL;
int index, cur_arg, ret = 0;
if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[0], NULL))
ret = 1;
/* Deduce the ruleset name from the proxy info */
chunk_printf(&trash, "*tcp-check-%s_%s-%d",
((curpx == defpx) ? "defaults" : curpx->id),
curpx->conf.file, curpx->conf.line);
rs = find_tcpcheck_ruleset(b_orig(&trash));
if (rs == NULL) {
rs = create_tcpcheck_ruleset(b_orig(&trash));
if (rs == NULL) {
memprintf(errmsg, "out of memory.\n");
goto error;
}
}
index = 0;
if (!LIST_ISEMPTY(&rs->rules)) {
chk = LIST_PREV(&rs->rules, typeof(chk), list);
index = chk->index + 1;
}
cur_arg = 1;
if (strcmp(args[cur_arg], "connect") == 0)
chk = parse_tcpcheck_connect(args, cur_arg, curpx, &rs->rules, file, line, errmsg);
else if (strcmp(args[cur_arg], "send") == 0 || strcmp(args[cur_arg], "send-binary") == 0 ||
strcmp(args[cur_arg], "send-lf") == 0 || strcmp(args[cur_arg], "send-binary-lf") == 0)
chk = parse_tcpcheck_send(args, cur_arg, curpx, &rs->rules, file, line, errmsg);
else if (strcmp(args[cur_arg], "expect") == 0)
chk = parse_tcpcheck_expect(args, cur_arg, curpx, &rs->rules, 0, file, line, errmsg);
else if (strcmp(args[cur_arg], "comment") == 0)
chk = parse_tcpcheck_comment(args, cur_arg, curpx, &rs->rules, file, line, errmsg);
else {
struct action_kw *kw = action_kw_tcp_check_lookup(args[cur_arg]);
if (!kw) {
action_kw_tcp_check_build_list(&trash);
memprintf(errmsg, "'%s' only supports 'comment', 'connect', 'send', 'send-binary', 'expect'"
"%s%s. but got '%s'",
args[0], (*trash.area ? ", " : ""), trash.area, args[1]);
goto error;
}
chk = parse_tcpcheck_action(args, cur_arg, curpx, &rs->rules, kw, file, line, errmsg);
}
if (!chk) {
memprintf(errmsg, "'%s %s' : %s.", args[0], args[1], *errmsg);
goto error;
}
ret = (ret || (*errmsg != NULL)); /* Handle warning */
/* No error: add the tcp-check rule in the list */
chk->index = index;
LIST_ADDQ(&rs->rules, &chk->list);
if ((curpx->options2 & PR_O2_CHK_ANY) == PR_O2_TCPCHK_CHK &&
(curpx->tcpcheck_rules.flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_TCP_CHK) {
/* Use this ruleset if the proxy already has tcp-check enabled */
curpx->tcpcheck_rules.list = &rs->rules;
curpx->tcpcheck_rules.flags &= ~TCPCHK_RULES_UNUSED_TCP_RS;
}
else {
/* mark this ruleset as unused for now */
curpx->tcpcheck_rules.flags |= TCPCHK_RULES_UNUSED_TCP_RS;
}
return ret;
error:
free_tcpcheck(chk, 0);
free_tcpcheck_ruleset(rs);
return -1;
}
static struct cfg_kw_list cfg_kws = {ILH, {
{ CFG_LISTEN, "tcp-check", proxy_parse_tcpcheck },
{ 0, NULL, NULL },
}};
REGISTER_POST_PROXY_CHECK(check_proxy_tcpcheck);
REGISTER_PROXY_DEINIT(deinit_proxy_tcpcheck);
REGISTER_POST_DEINIT(deinit_tcpchecks);
INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);