diff options
Diffstat (limited to 'src/tcpcheck.c')
| -rw-r--r-- | src/tcpcheck.c | 5209 |
1 files changed, 5209 insertions, 0 deletions
diff --git a/src/tcpcheck.c b/src/tcpcheck.c new file mode 100644 index 0000000..6441d34 --- /dev/null +++ b/src/tcpcheck.c @@ -0,0 +1,5209 @@ +/* + * 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> + * Crown Copyright 2022 Defence Science and Technology Laboratory <dstlipgroup@dstl.gov.uk> + * + * 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 <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/net_helper.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/stconn.h> +#include <haproxy/task.h> +#include <haproxy/tcpcheck.h> +#include <haproxy/ticks.h> +#include <haproxy/tools.h> +#include <haproxy/trace.h> +#include <haproxy/vars.h> + + +#define TRACE_SOURCE &trace_check + +/* 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_DELETE(&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_DELETE(&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_DELETE(&var->list); + free_tcpcheck_var(var); + } +} + +/* Duplicate a list of preset tcp-check variables */ +int dup_tcpcheck_vars(struct list *dst, const struct list *src) +{ + const struct tcpcheck_var *var; + struct tcpcheck_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_APPEND(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_DELETE(&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(const struct check *check, const 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(const 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_istcat(msg, 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_istcat(msg, 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; + + + TRACE_ENTER(CHK_EV_TCPCHK_EXP, check); + + /* 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); + TRACE_LEAVE(CHK_EV_TCPCHK_EXP, check, 0, 0, (size_t[]){ret}); + 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: + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + 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; + char *ptr; + unsigned short nbytes = 0; + size_t msglen = 0; + + TRACE_ENTER(CHK_EV_TCPCHK_EXP, check); + + /* Check if the server speaks LDAP (ASN.1/BER) + * http://en.wikipedia.org/wiki/Basic_Encoding_Rules + * http://tools.ietf.org/html/rfc4511 + */ + ptr = b_head(&check->bi) + 1; + + /* size of LDAPMessage */ + if (*ptr & 0x80) { + /* For message size encoded on several bytes, we only handle + * size encoded on 2 or 4 bytes. There is no reason to make this + * part to complex because only Active Directory is known to + * encode BindReponse length on 4 bytes. + */ + nbytes = (*ptr & 0x7f); + if (b_data(&check->bi) < 1 + nbytes) + goto too_short; + switch (nbytes) { + case 4: msglen = read_n32(ptr+1); break; + case 2: msglen = read_n16(ptr+1); break; + default: + status = HCHK_STATUS_L7RSP; + desc = ist("Not LDAPv3 protocol"); + goto error; + } + } + else + msglen = *ptr; + ptr += 1 + nbytes; + + if (b_data(&check->bi) < 2 + nbytes + msglen) + goto too_short; + + /* http://tools.ietf.org/html/rfc4511#section-4.2.2 + * messageID: 0x02 0x01 0x01: INTEGER 1 + * protocolOp: 0x61: bindResponse + */ + if (memcmp(ptr, "\x02\x01\x01\x61", 4) != 0) { + status = HCHK_STATUS_L7RSP; + desc = ist("Not LDAPv3 protocol"); + goto error; + } + ptr += 4; + + /* skip size of bindResponse */ + nbytes = 0; + if (*ptr & 0x80) + nbytes = (*ptr & 0x7f); + ptr += 1 + nbytes; + + /* http://tools.ietf.org/html/rfc4511#section-4.1.9 + * ldapResult: 0x0a 0x01: ENUMERATION + */ + if (memcmp(ptr, "\x0a\x01", 2) != 0) { + status = HCHK_STATUS_L7RSP; + desc = ist("Not LDAPv3 protocol"); + goto error; + } + ptr += 2; + + /* http://tools.ietf.org/html/rfc4511#section-4.1.9 + * resultCode + */ + check->code = *ptr; + 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); + TRACE_LEAVE(CHK_EV_TCPCHK_EXP, check, 0, 0, (size_t[]){ret}); + 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; + + too_short: + if (!last_read) + goto wait_more_data; + /* invalid length or truncated response */ + status = HCHK_STATUS_L7RSP; + goto error; + + wait_more_data: + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + ret = TCPCHK_EVAL_WAIT; + 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; + + TRACE_ENTER(CHK_EV_TCPCHK_EXP, check); + + 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); + TRACE_LEAVE(CHK_EV_TCPCHK_EXP, check, 0, 0, (size_t[]){ret}); + 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: + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + 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 *sc = NULL; /* maxconn */ + const char *err = NULL; /* first error to report */ + const char *wrn = NULL; /* first warning to report */ + char *cmd, *p; + + TRACE_ENTER(CHK_EV_TCPCHK_EXP, check); + + /* 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->health = check->rise + check->fall - 1; + status = HCHK_STATUS_L7OKD; + hs = cmd; + } + else if (strcasecmp(cmd, "down") == 0) { + check->health = 0; + status = HCHK_STATUS_L7STS; + hs = cmd; + } + else if (strcasecmp(cmd, "stopped") == 0) { + check->health = 0; + status = HCHK_STATUS_L7STS; + hs = cmd; + } + else if (strcasecmp(cmd, "fail") == 0) { + 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) { + sc = 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) { + TRACE_DEVEL("set server into DRAIN mode", CHK_EV_TCPCHK_EXP, check); + srv_adm_set_drain(check->server); + } + else if (strcasecmp(as, "maint") == 0) { + TRACE_DEVEL("set server into MAINT mode", CHK_EV_TCPCHK_EXP, check); + srv_adm_set_maint(check->server); + } + else { + TRACE_DEVEL("set server into READY mode", CHK_EV_TCPCHK_EXP, check); + srv_adm_set_ready(check->server); + } + } + + /* now change weights */ + if (ps) { + const char *msg; + + TRACE_DEVEL("change server weight", CHK_EV_TCPCHK_EXP, check); + msg = server_parse_weight_change_request(check->server, ps); + if (!wrn || !*wrn) + wrn = msg; + } + + if (sc) { + const char *msg; + + sc += strlen("maxconn:"); + + TRACE_DEVEL("change server maxconn", CHK_EV_TCPCHK_EXP, check); + /* This is safe to call server_parse_maxconn_change_request + * because the server lock is held during the check. + */ + msg = server_parse_maxconn_change_request(check->server, sc); + 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 ? ")" : ""); + TRACE_DEVEL("update server health status", CHK_EV_TCPCHK_EXP, check); + 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. + */ + TRACE_DEVEL("agent reports an error", CHK_EV_TCPCHK_EXP, check); + 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. + */ + TRACE_DEVEL("agent reports a warning", CHK_EV_TCPCHK_EXP, check); + chunk_printf(&trash, "agent warns : %s", wrn); + set_server_check_status(check, status/*check->status*/, trash.area); + } + else { + TRACE_DEVEL("update server health status", CHK_EV_TCPCHK_EXP, check); + set_server_check_status(check, status, NULL); + } + + out: + TRACE_LEAVE(CHK_EV_TCPCHK_EXP, check, 0, 0, (size_t[]){ret}); + return ret; + + wait_more_data: + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + 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 connection *conn = sc_conn(check->sc); + struct protocol *proto; + struct xprt_ops *xprt; + struct tcpcheck_rule *next; + int status, port; + + TRACE_ENTER(CHK_EV_TCPCHK_CONN, check); + + next = get_next_tcpcheck_rule(check->tcpcheck_rules, rule); + + /* current connection already created, check if it is established or not */ + if (conn) { + if (conn->flags & CO_FL_WAIT_XPRT) { + /* We are still waiting for the connection establishment */ + if (next && next->action == TCPCHK_ACT_SEND) { + if (!(check->sc->wait_event.events & SUB_RETRY_SEND)) + conn->mux->subscribe(check->sc, SUB_RETRY_SEND, &check->sc->wait_event); + ret = TCPCHK_EVAL_WAIT; + TRACE_DEVEL("not connected yet", CHK_EV_TCPCHK_CONN, check); + } + else + ret = tcpcheck_eval_recv(check, rule); + } + goto out; + } + + /* Note: here check->sc = sc = conn = NULL */ + + /* Always release input and output buffer when a new connect is evaluated */ + check_release_buf(check, &check->bi); + check_release_buf(check, &check->bo); + + /* No connection, prepare a new one */ + conn = conn_new((s ? &s->obj_type : &proxy->obj_type)); + if (!conn) { + 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; + TRACE_ERROR("stconn allocation error", CHK_EV_TCPCHK_CONN|CHK_EV_TCPCHK_ERR, check); + goto out; + } + if (sc_attach_mux(check->sc, NULL, conn) < 0) { + TRACE_ERROR("mux attach error", CHK_EV_TCPCHK_CONN|CHK_EV_TCPCHK_ERR, check); + conn_free(conn); + conn = NULL; + status = SF_ERR_RESOURCE; + goto fail_check; + } + conn->ctx = check->sc; + conn_set_owner(conn, check->sess, NULL); + + /* no client address */ + if (!sockaddr_alloc(&conn->dst, NULL, 0)) { + TRACE_ERROR("sockaddr allocation error", CHK_EV_TCPCHK_CONN|CHK_EV_TCPCHK_ERR, check); + 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_lookup(conn->dst->ss_family, PROTO_TYPE_STREAM, 0); + + port = 0; + if (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); + TRACE_DEVEL("set port", CHK_EV_TCPCHK_CONN, check, 0, 0, (size_t[]){port}); + + xprt = ((connect->options & TCPCHK_OPT_SSL) + ? xprt_get(XPRT_SSL) + : ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) ? check->xprt : xprt_get(XPRT_RAW))); + + if (conn_prepare(conn, proto, xprt) < 0) { + TRACE_ERROR("xprt allocation error", CHK_EV_TCPCHK_CONN|CHK_EV_TCPCHK_ERR, check); + status = SF_ERR_RESOURCE; + goto fail_check; + } + + if ((connect->options & TCPCHK_OPT_SOCKS4) && s && (s->flags & SRV_F_SOCKS4_PROXY)) { + conn->send_proxy_ofs = 1; + conn->flags |= CO_FL_SOCKS4; + TRACE_DEVEL("configure SOCKS4 proxy", CHK_EV_TCPCHK_CONN); + } + 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; + TRACE_DEVEL("configure SOCKS4 proxy", CHK_EV_TCPCHK_CONN); + } + + if (connect->options & TCPCHK_OPT_SEND_PROXY) { + conn->send_proxy_ofs = 1; + conn->flags |= CO_FL_SEND_PROXY; + TRACE_DEVEL("configure PROXY protocol", CHK_EV_TCPCHK_CONN, check); + } + 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; + TRACE_DEVEL("configure PROXY protocol", CHK_EV_TCPCHK_CONN, check); + } + + status = SF_ERR_INTERNAL; + if (proto && proto->connect) { + int flags = 0; + + if (!next) + flags |= CONNECT_DELACK_ALWAYS; + if (connect->options & TCPCHK_OPT_HAS_DATA) + flags |= (CONNECT_HAS_DATA|CONNECT_DELACK_ALWAYS); + status = proto->connect(conn, flags); + } + + if (status != SF_ERR_NONE) + goto fail_check; + + conn_set_private(conn); + conn->ctx = check->sc; + +#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) && !(conn->flags & CO_FL_FDLESS)) { + /* Some servers don't like reset on close */ + HA_ATOMIC_AND(&fdtab[conn->handle.fd].state, ~FD_LINGER_RISK); + } + + if (conn_ctrl_ready(conn) && (conn->flags & (CO_FL_SEND_PROXY | CO_FL_SOCKS4))) { + if (xprt_add_hs(conn) < 0) + status = SF_ERR_RESOURCE; + } + + if (conn_xprt_start(conn) < 0) { + status = SF_ERR_RESOURCE; + goto fail_check; + } + + /* 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; + + TRACE_DEVEL("try to install mux now", CHK_EV_TCPCHK_CONN, check); + 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, check->sc, proxy, check->sess) < 0) { + TRACE_ERROR("failed to install mux", CHK_EV_TCPCHK_CONN|CHK_EV_TCPCHK_ERR, check); + 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: + TRACE_ERROR("report connection error", CHK_EV_TCPCHK_CONN|CHK_EV_TCPCHK_ERR, check, 0, 0, (size_t[]){status}); + 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(check->sc, SUB_RETRY_SEND, &check->sc->wait_event); + else + conn->mux->subscribe(check->sc, SUB_RETRY_RECV, &check->sc->wait_event); + } + ret = TCPCHK_EVAL_WAIT; + TRACE_DEVEL("not connected yet", CHK_EV_TCPCHK_CONN, check); + goto out; + } + + out: + if (conn && check->result == CHK_RES_FAILED) { + conn->flags |= CO_FL_ERROR; + TRACE_ERROR("connect failed, report connection error", CHK_EV_TCPCHK_CONN|CHK_EV_TCPCHK_ERR, check); + } + + if (ret == TCPCHK_EVAL_CONTINUE && check->proxy->timeout.check) + check->task->expire = tick_add_ifset(now_ms, check->proxy->timeout.check); + + TRACE_LEAVE(CHK_EV_TCPCHK_CONN, check, 0, 0, (size_t[]){ret}); + 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 stconn *sc = check->sc; + struct connection *conn = __sc_conn(sc); + struct buffer *tmp = NULL; + struct htx *htx = NULL; + int connection_hdr = 0; + + TRACE_ENTER(CHK_EV_TCPCHK_SND|CHK_EV_TX_DATA, check); + + if (check->state & CHK_ST_OUT_ALLOC) { + ret = TCPCHK_EVAL_WAIT; + TRACE_STATE("waiting for output buffer allocation", CHK_EV_TCPCHK_SND|CHK_EV_TX_DATA|CHK_EV_TX_BLK, check); + goto out; + } + + if (!check_get_buf(check, &check->bo)) { + check->state |= CHK_ST_OUT_ALLOC; + ret = TCPCHK_EVAL_WAIT; + TRACE_STATE("waiting for output buffer allocation", CHK_EV_TCPCHK_SND|CHK_EV_TX_DATA|CHK_EV_TX_BLK, check); + goto out; + } + + /* Data already pending in the output buffer, send them now */ + if ((IS_HTX_CONN(conn) && !htx_is_empty(htxbuf(&check->bo))) || (!IS_HTX_CONN(conn) && b_data(&check->bo))) { + TRACE_DEVEL("Data still pending, try to send it now", CHK_EV_TCPCHK_SND|CHK_EV_TX_DATA, check); + goto do_send; + } + + /* Always release input buffer when a new send is evaluated */ + check_release_buf(check, &check->bi); + + 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 (!(send->http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) && !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 (isteqi(hdr->name, ist("connection"))) + connection_hdr = 1; + } + + } + 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; + + if (!connection_hdr && !htx_add_header(htx, ist("Connection"), ist("close"))) + goto error_htx; + + if ((send->http.meth.meth != HTTP_METH_OPTIONS && + send->http.meth.meth != HTTP_METH_GET && + send->http.meth.meth != HTTP_METH_HEAD && + send->http.meth.meth != HTTP_METH_DELETE) || istlen(body)) { + clen = ist((!istlen(body) ? "0" : ultoa(istlen(body)))); + if (!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; + + /* no more data are expected */ + htx->flags |= HTX_FL_EOM; + htx_to_buf(htx, &check->bo); + break; + } + case TCPCHK_SEND_UNDEF: + /* Should never happen. */ + ret = TCPCHK_EVAL_STOP; + goto out; + }; + + do_send: + TRACE_DATA("send data", CHK_EV_TCPCHK_SND|CHK_EV_TX_DATA, check); + if (conn->mux->snd_buf(sc, &check->bo, + (IS_HTX_CONN(conn) ? (htxbuf(&check->bo))->data: b_data(&check->bo)), 0) <= 0) { + if ((conn->flags & CO_FL_ERROR) || sc_ep_test(sc, SE_FL_ERROR)) { + ret = TCPCHK_EVAL_STOP; + TRACE_DEVEL("connection error during send", CHK_EV_TCPCHK_SND|CHK_EV_TX_DATA|CHK_EV_TX_ERR, check); + goto out; + } + } + if ((IS_HTX_CONN(conn) && !htx_is_empty(htxbuf(&check->bo))) || (!IS_HTX_CONN(conn) && b_data(&check->bo))) { + conn->mux->subscribe(sc, SUB_RETRY_SEND, &sc->wait_event); + ret = TCPCHK_EVAL_WAIT; + TRACE_DEVEL("data not fully sent, wait", CHK_EV_TCPCHK_SND|CHK_EV_TX_DATA, check); + goto out; + } + + out: + free_trash_chunk(tmp); + if (!b_data(&check->bo) || ret == TCPCHK_EVAL_STOP) + check_release_buf(check, &check->bo); + + TRACE_LEAVE(CHK_EV_TCPCHK_SND, check, 0, 0, (size_t[]){ret}); + 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)); + TRACE_ERROR("failed to build HTTP request", CHK_EV_TCPCHK_SND|CHK_EV_TX_DATA|CHK_EV_TCPCHK_ERR, check); + 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)); + TRACE_ERROR("failed to build log-format string", CHK_EV_TCPCHK_SND|CHK_EV_TX_DATA|CHK_EV_TCPCHK_ERR, check); + 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 stconn *sc = check->sc; + struct connection *conn = __sc_conn(sc); + 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; + + TRACE_ENTER(CHK_EV_RX_DATA, check); + + if (sc->wait_event.events & SUB_RETRY_RECV) { + TRACE_DEVEL("waiting for response", CHK_EV_RX_DATA, check); + goto wait_more_data; + } + + if (sc_ep_test(sc, SE_FL_EOS)) + goto end_recv; + + if (check->state & CHK_ST_IN_ALLOC) { + TRACE_STATE("waiting for input buffer allocation", CHK_EV_RX_DATA|CHK_EV_RX_BLK, check); + goto wait_more_data; + } + + if (!check_get_buf(check, &check->bi)) { + check->state |= CHK_ST_IN_ALLOC; + TRACE_STATE("waiting for input buffer allocation", CHK_EV_RX_DATA|CHK_EV_RX_BLK, check); + goto wait_more_data; + } + + /* errors on the connection and the stream connector were already checked */ + + /* prepare to detect if the mux needs more room */ + sc_ep_clr(sc, SE_FL_WANT_ROOM); + + while (sc_ep_test(sc, SE_FL_RCV_MORE) || + (!(conn->flags & CO_FL_ERROR) && !sc_ep_test(sc, SE_FL_ERROR | SE_FL_EOS))) { + max = (IS_HTX_SC(sc) ? htx_free_space(htxbuf(&check->bi)) : b_room(&check->bi)); + read = conn->mux->rcv_buf(sc, &check->bi, max, 0); + cur_read += read; + if (!read || + sc_ep_test(sc, SE_FL_WANT_ROOM) || + (--read_poll <= 0) || + (read < max && read >= global.tune.recv_enough)) + break; + } + + end_recv: + is_empty = (IS_HTX_SC(sc) ? htx_is_empty(htxbuf(&check->bi)) : !b_data(&check->bi)); + if (is_empty && ((conn->flags & CO_FL_ERROR) || sc_ep_test(sc, SE_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. + */ + TRACE_ERROR("connection error during recv", CHK_EV_RX_DATA|CHK_EV_RX_ERR, check); + goto stop; + } + if (!cur_read) { + if (sc_ep_test(sc, SE_FL_EOI)) { + /* If EOI is set, it means there is a response or an error */ + goto out; + } + + if (!sc_ep_test(sc, SE_FL_WANT_ROOM | SE_FL_ERROR | SE_FL_EOS)) { + conn->mux->subscribe(sc, SUB_RETRY_RECV, &sc->wait_event); + TRACE_DEVEL("waiting for response", CHK_EV_RX_DATA, check); + 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); + + TRACE_ERROR("empty response", CHK_EV_RX_DATA|CHK_EV_RX_ERR, check); + 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; + } + } + TRACE_DATA("data received", CHK_EV_RX_DATA, check, 0, 0, (size_t[]){cur_read}); + + out: + if (!b_data(&check->bi) || ret == TCPCHK_EVAL_STOP) + check_release_buf(check, &check->bi); + + TRACE_LEAVE(CHK_EV_RX_DATA, check, 0, 0, (size_t[]){ret}); + 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; + + TRACE_ENTER(CHK_EV_TCPCHK_EXP, check); + + last_read |= (!htx_free_data_space(htx) || (htx->flags & HTX_FL_EOM)); + + if (htx->flags & HTX_FL_PARSING_ERROR) { + TRACE_ERROR("invalid response", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + status = HCHK_STATUS_L7RSP; + goto error; + } + + if (htx_is_empty(htx)) { + if (last_read) { + TRACE_ERROR("empty response received", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + status = HCHK_STATUS_L7RSP; + goto error; + } + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + 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 */ + TRACE_STATE("404 response & disable-404", CHK_EV_TCPCHK_EXP, check); + 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"); + TRACE_ERROR("buffer allocation failure", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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"); + TRACE_ERROR("invalid log-format string (hdr name)", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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"); + TRACE_ERROR("buffer allocation failure", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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"); + TRACE_ERROR("invalid log-format string (hdr value)", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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(istend(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_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) { + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + 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"); + TRACE_ERROR("no response boduy found while expected", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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"); + TRACE_ERROR("buffer allocation failure", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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"); + TRACE_ERROR("invalid log-format string", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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)); + + /* 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; + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + goto out; + } + + /* 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; + } + + if (!(match ^ inverse)) { + TRACE_STATE("expect rule failed", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + goto error; + } + + TRACE_STATE("expect rule succeeded", CHK_EV_TCPCHK_EXP, check); + + out: + free_trash_chunk(tmp); + free_trash_chunk(nbuf); + free_trash_chunk(vbuf); + free_trash_chunk(msg); + TRACE_LEAVE(CHK_EV_TCPCHK_EXP, check, 0, 0, (size_t[]){ret}); + return ret; + + error: + TRACE_STATE("expect rule failed", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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; + + TRACE_ENTER(CHK_EV_TCPCHK_EXP, check); + + 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; + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + goto out; + } + if (expect->min_recv > 0 && (b_data(&check->bi) < expect->min_recv)) { + ret = TCPCHK_EVAL_WAIT; + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + 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"); + TRACE_ERROR("buffer allocation failure", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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"); + TRACE_ERROR("invalid log-format string", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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"); + TRACE_ERROR("invalid binary log-format string", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + goto error; + } + tmp->data = len; + } + if (b_data(&check->bi) < tmp->data) { + if (!last_read) { + ret = TCPCHK_EVAL_WAIT; + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + 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; + TRACE_DEVEL("waiting for more data", CHK_EV_TCPCHK_EXP, check); + goto out; + } + + /* Result as expected, next rule. */ + if (match ^ inverse) { + TRACE_STATE("expect rule succeeded", CHK_EV_TCPCHK_EXP, check); + goto out; + } + + error: + /* From this point on, we matched something we did not want, this is an error state. */ + TRACE_STATE("expect rule failed", CHK_EV_TCPCHK_EXP|CHK_EV_TCPCHK_ERR, check); + 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); + TRACE_LEAVE(CHK_EV_TCPCHK_EXP, check, 0, 0, (size_t[]){ret}); + 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 stconn *sc = check->sc; + struct connection *conn = sc_conn(sc); + int must_read = 1, last_read = 0; + int 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; + + TRACE_ENTER(CHK_EV_TCPCHK_EVAL, check); + + /* Note: the stream connector and the connection may only be undefined before + * the first rule evaluation (it is always a connect rule) or when the + * stream connector allocation failed on a connect rule, during sc allocation. + */ + + /* 1- check for connection error, if any */ + if ((conn && conn->flags & CO_FL_ERROR) || sc_ep_test(sc, SE_FL_ERROR)) + goto out_end_tcpcheck; + + /* 2- check if a rule must be resume. It happens if check->current_step + * is defined. */ + else if (check->current_step) { + rule = check->current_step; + TRACE_PROTO("resume rule evaluation", CHK_EV_TCPCHK_EVAL, check, 0, 0, (size_t[]){ tcpcheck_get_step_id(check, rule)}); + } + + /* 3- 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"); + TRACE_ERROR("session allocation failure", CHK_EV_TCPCHK_EVAL|CHK_EV_TCPCHK_ERR, check); + set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area); + goto out_end_tcpcheck; + } + vars_init_head(&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); + } + TRACE_PROTO("start rules evaluation", CHK_EV_TCPCHK_EVAL, check); + } + + /* 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: + /* Not the first connection, release it first */ + if (sc_conn(sc) && check->current_step != rule) { + check->state |= CHK_ST_CLOSE_CONN; + retcode = -1; + } + + check->current_step = rule; + + /* We are still waiting the connection gets closed */ + if (check->state & CHK_ST_CLOSE_CONN) { + TRACE_DEVEL("wait previous connection closure", CHK_EV_TCPCHK_EVAL|CHK_EV_TCPCHK_CONN, check); + eval_ret = TCPCHK_EVAL_WAIT; + break; + } + + TRACE_PROTO("eval connect rule", CHK_EV_TCPCHK_EVAL|CHK_EV_TCPCHK_CONN, check); + eval_ret = tcpcheck_eval_connect(check, rule); + + /* Refresh connection */ + conn = sc_conn(sc); + last_read = 0; + must_read = (IS_HTX_SC(sc) ? htx_is_empty(htxbuf(&check->bi)) : !b_data(&check->bi)); + break; + case TCPCHK_ACT_SEND: + check->current_step = rule; + TRACE_PROTO("eval send rule", CHK_EV_TCPCHK_EVAL|CHK_EV_TCPCHK_SND, check); + eval_ret = tcpcheck_eval_send(check, rule); + must_read = 1; + break; + case TCPCHK_ACT_EXPECT: + check->current_step = rule; + TRACE_PROTO("eval expect rule", CHK_EV_TCPCHK_EVAL|CHK_EV_TCPCHK_EXP, check); + if (must_read) { + 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) || sc_ep_test(sc, SE_FL_ERROR | SE_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 (!(sc->wait_event.events & SUB_RETRY_RECV)) + conn->mux->subscribe(sc, SUB_RETRY_RECV, &sc->wait_event); + } + break; + case TCPCHK_ACT_ACTION_KW: + /* Don't update the current step */ + TRACE_PROTO("eval action kw rule", CHK_EV_TCPCHK_EVAL|CHK_EV_TCPCHK_ACT, check); + 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; + + TRACE_DEVEL("eval tcp-check result", CHK_EV_TCPCHK_EVAL, check); + + 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); + TRACE_PROTO("tcp-check conditionally passed (disable-404)", CHK_EV_TCPCHK_EVAL, check); + 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 (conn_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)"); + } + else { + set_server_check_status(check, HCHK_STATUS_L7OKD, "(tcp-check)"); + } + TRACE_PROTO("tcp-check passed", CHK_EV_TCPCHK_EVAL, check); + + out_end_tcpcheck: + if ((conn && conn->flags & CO_FL_ERROR) || sc_ep_test(sc, SE_FL_ERROR)) { + TRACE_ERROR("report connection error", CHK_EV_TCPCHK_EVAL|CHK_EV_TCPCHK_ERR, check); + chk_report_conn_err(check, errno, 0); + } + + /* the tcpcheck is finished, release in/out buffer now */ + check_release_buf(check, &check->bi); + check_release_buf(check, &check->bo); + + out: + TRACE_LEAVE(CHK_EV_HCHK_RUN, check); + return retcode; +} + +void tcp_check_keywords_register(struct action_kw_list *kw_list) +{ + LIST_APPEND(&tcp_check_keywords.list, &kw_list->list); +} + +/**************************************************************************/ +/******************* 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 = new_act_rule(ACT_F_TCP_CHK, file, line); + if (!actrule) { + memprintf(errmsg, "out of memory"); + goto error; + } + actrule->kw = kw; + + 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(ist(args[cur_arg + 1])); + if (!mux_proto) { + memprintf(errmsg, "'%s' : unknown MUX protocol '%s'.", args[cur_arg], args[cur_arg+1]); + goto error; + } + + if (strcmp(args[0], "tcp-check") == 0 && mux_proto->mode != PROTO_MODE_TCP) { + memprintf(errmsg, "'%s' : invalid MUX protocol '%s' for tcp-check", args[cur_arg], args[cur_arg+1]); + goto error; + } + else if (strcmp(args[0], "http-check") == 0 && mux_proto->mode != PROTO_MODE_HTTP) { + memprintf(errmsg, "'%s' : invalid MUX protocol '%s' for http-check", 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 = ist(strdup(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], "content-length") == 0 || + strcasecmp(args[cur_arg+1], "transfer-encoding") == 0) + goto skip_hdr; + + hdrs[i].n = ist(args[cur_arg + 1]); + hdrs[i].v = ist(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 = ist(strdup(uri)); + if (!isttest(chk->send.http.uri)) { + memprintf(errmsg, "out of memory"); + goto error; + } + } + } + if (vsn) { + chk->send.http.vsn = ist(strdup(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_APPEND(&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 = ist(strdup(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 bufsize */ + 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], "L7OKC") == 0) + err_st = HCHK_STATUS_L7OKCD; + 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 = ist(strdup(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 = ist(strdup(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 = ist(strdup(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_DELETE(&lf->list); + LIST_APPEND(&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; + } + + if (!LIST_ISEMPTY(&new->send.http.hdrs)) { + free_tcpcheck_http_hdrs(&old->send.http.hdrs); + list_for_each_entry_safe(hdr, bhdr, &new->send.http.hdrs, list) { + LIST_DELETE(&hdr->list); + LIST_APPEND(&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_DELETE(&lf->list); + LIST_APPEND(&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_INSERT(rules->list, &chk->list); + else if (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT) { + LIST_DELETE(&r->list); + free_tcpcheck(r, 0); + LIST_INSERT(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_DELETE(&r->list); + r->send.http.flags &= ~TCPCHK_SND_HTTP_FROM_OPT; + chk = r; + } + } + LIST_APPEND(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 = ERR_NONE; + + if (!(px->cap & PR_CAP_BE) || (px->options2 & PR_O2_CHK_ANY) != PR_O2_TCPCHK_CHK) { + deinit_proxy_tcpcheck(px); + goto out; + } + + ha_free(&px->check_command); + ha_free(&px->check_path); + + if (!px->tcpcheck_rules.list) { + ha_alert("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_DELETE(&chk->list); + LIST_INSERT(&next->list, &chk->list); + chk->index = next->index + 1; + } + } + + /* 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("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_APPEND(px->tcpcheck_rules.list, &next->list); + next->index = chk->index + 1; + } + } + + /* 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("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_INSERT(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) { + struct tcpcheck_rule *next; + + if (chk->action != prev_action && prev_action != TCPCHK_ACT_COMMENT) + ha_free(&comment); + + prev_action = chk->action; + switch (chk->action) { + case TCPCHK_ACT_COMMENT: + free(comment); + comment = chk->comment; + LIST_DELETE(&chk->list); + free(chk); + break; + case TCPCHK_ACT_CONNECT: + if (!chk->comment && comment) + chk->comment = strdup(comment); + next = get_next_tcpcheck_rule(&px->tcpcheck_rules, chk); + if (next && next->action == TCPCHK_ACT_SEND) + chk->connect.options |= TCPCHK_OPT_HAS_DATA; + /* fall through */ + case TCPCHK_ACT_ACTION_KW: + ha_free(&comment); + break; + case TCPCHK_ACT_SEND: + case TCPCHK_ACT_EXPECT: + if (!chk->comment && comment) + chk->comment = strdup(comment); + break; + } + } + ha_free(&comment); + + 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_DELETE(&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_zalloc(pool_head_tcpcheck_rule)) == NULL) + return 0; + 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 = ist(strdup(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_APPEND(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_zalloc(pool_head_tcpcheck_rule)) == NULL) + return 0; + 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_APPEND(rules->list, &tcpcheck->list); + return 1; +} + +/* Parses the "tcp-check" proxy keyword */ +static int proxy_parse_tcpcheck(char **args, int section, struct proxy *curpx, + const 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; + chk = NULL; + } + + 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_APPEND(&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; +} + +/* Parses the "http-check" proxy keyword */ +static int proxy_parse_httpcheck(char **args, int section, struct proxy *curpx, + const 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; + + cur_arg = 1; + if (strcmp(args[cur_arg], "disable-on-404") == 0) { + /* enable a graceful server shutdown on an HTTP 404 response */ + curpx->options |= PR_O_DISABLE404; + if (too_many_args(1, args, errmsg, NULL)) + goto error; + goto out; + } + else if (strcmp(args[cur_arg], "send-state") == 0) { + /* enable emission of the apparent state of a server in HTTP checks */ + curpx->options2 |= PR_O2_CHK_SNDST; + if (too_many_args(1, args, errmsg, NULL)) + goto error; + goto out; + } + + /* Deduce the ruleset name from the proxy info */ + chunk_printf(&trash, "*http-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); + if (chk->action != TCPCHK_ACT_SEND || !(chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) + index = chk->index + 1; + chk = NULL; + } + + 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) + chk = parse_tcpcheck_send_http(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, TCPCHK_RULES_HTTP_CHK, + 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 'disable-on-404', 'send-state', 'comment', 'connect'," + " 'send', '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 = (*errmsg != NULL); /* Handle warning */ + + chk->index = index; + if ((curpx->options2 & PR_O2_CHK_ANY) == PR_O2_TCPCHK_CHK && + (curpx->tcpcheck_rules.flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK) { + /* Use this ruleset if the proxy already has http-check enabled */ + curpx->tcpcheck_rules.list = &rs->rules; + curpx->tcpcheck_rules.flags &= ~TCPCHK_RULES_UNUSED_HTTP_RS; + if (!tcpcheck_add_http_rule(chk, &curpx->tcpcheck_rules, errmsg)) { + memprintf(errmsg, "'%s %s' : %s.", args[0], args[1], *errmsg); + curpx->tcpcheck_rules.list = NULL; + goto error; + } + } + else { + /* mark this ruleset as unused for now */ + curpx->tcpcheck_rules.flags |= TCPCHK_RULES_UNUSED_HTTP_RS; + LIST_APPEND(&rs->rules, &chk->list); + } + + out: + return ret; + + error: + free_tcpcheck(chk, 0); + free_tcpcheck_ruleset(rs); + return -1; +} + +/* Parses the "option redis-check" proxy keyword */ +int proxy_parse_redis_check_opt(char **args, int cur_arg, struct proxy *curpx, const struct proxy *defpx, + const char *file, int line) +{ + static char *redis_req = "*1\r\n$4\r\nPING\r\n"; + static char *redis_res = "+PONG\r\n"; + + struct tcpcheck_ruleset *rs = NULL; + struct tcpcheck_rules *rules = &curpx->tcpcheck_rules; + struct tcpcheck_rule *chk; + char *errmsg = NULL; + int err_code = 0; + + if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[cur_arg+1], NULL)) + err_code |= ERR_WARN; + + if (alertif_too_many_args_idx(0, 1, file, line, args, &err_code)) + goto out; + + curpx->options2 &= ~PR_O2_CHK_ANY; + curpx->options2 |= PR_O2_TCPCHK_CHK; + + free_tcpcheck_vars(&rules->preset_vars); + rules->list = NULL; + rules->flags = 0; + + rs = find_tcpcheck_ruleset("*redis-check"); + if (rs) + goto ruleset_found; + + rs = create_tcpcheck_ruleset("*redis-check"); + if (rs == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + + chk = parse_tcpcheck_send((char *[]){"tcp-check", "send", redis_req, ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 0; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "string", redis_res, + "error-status", "L7STS", + "on-error", "%[res.payload(0,0),cut_crlf]", + "on-success", "Redis server is ok", + ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_REDIS_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 1; + LIST_APPEND(&rs->rules, &chk->list); + + ruleset_found: + rules->list = &rs->rules; + rules->flags &= ~(TCPCHK_RULES_PROTO_CHK|TCPCHK_RULES_UNUSED_RS); + rules->flags |= TCPCHK_RULES_REDIS_CHK; + + out: + free(errmsg); + return err_code; + + error: + free_tcpcheck_ruleset(rs); + err_code |= ERR_ALERT | ERR_FATAL; + goto out; +} + + +/* Parses the "option ssl-hello-chk" proxy keyword */ +int proxy_parse_ssl_hello_chk_opt(char **args, int cur_arg, struct proxy *curpx, const struct proxy *defpx, + const char *file, int line) +{ + /* This is the SSLv3 CLIENT HELLO packet used in conjunction with the + * ssl-hello-chk option to ensure that the remote server speaks SSL. + * + * Check RFC 2246 (TLSv1.0) sections A.3 and A.4 for details. + */ + static char sslv3_client_hello[] = { + "16" /* ContentType : 0x16 = Handshake */ + "0300" /* ProtocolVersion : 0x0300 = SSLv3 */ + "0079" /* ContentLength : 0x79 bytes after this one */ + "01" /* HanshakeType : 0x01 = CLIENT HELLO */ + "000075" /* HandshakeLength : 0x75 bytes after this one */ + "0300" /* Hello Version : 0x0300 = v3 */ + "%[date(),htonl,hex]" /* Unix GMT Time (s) : filled with <now> (@0x0B) */ + "%[str(HAPROXYSSLCHK\nHAPROXYSSLCHK\n),hex]" /* Random : must be exactly 28 bytes */ + "00" /* Session ID length : empty (no session ID) */ + "004E" /* Cipher Suite Length : 78 bytes after this one */ + "0001" "0002" "0003" "0004" /* 39 most common ciphers : */ + "0005" "0006" "0007" "0008" /* 0x01...0x1B, 0x2F...0x3A */ + "0009" "000A" "000B" "000C" /* This covers RSA/DH, */ + "000D" "000E" "000F" "0010" /* various bit lengths, */ + "0011" "0012" "0013" "0014" /* SHA1/MD5, DES/3DES/AES... */ + "0015" "0016" "0017" "0018" + "0019" "001A" "001B" "002F" + "0030" "0031" "0032" "0033" + "0034" "0035" "0036" "0037" + "0038" "0039" "003A" + "01" /* Compression Length : 0x01 = 1 byte for types */ + "00" /* Compression Type : 0x00 = NULL compression */ + }; + + struct tcpcheck_ruleset *rs = NULL; + struct tcpcheck_rules *rules = &curpx->tcpcheck_rules; + struct tcpcheck_rule *chk; + char *errmsg = NULL; + int err_code = 0; + + if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[cur_arg+1], NULL)) + err_code |= ERR_WARN; + + if (alertif_too_many_args_idx(0, 1, file, line, args, &err_code)) + goto out; + + curpx->options2 &= ~PR_O2_CHK_ANY; + curpx->options2 |= PR_O2_TCPCHK_CHK; + + free_tcpcheck_vars(&rules->preset_vars); + rules->list = NULL; + rules->flags = 0; + + rs = find_tcpcheck_ruleset("*ssl-hello-check"); + if (rs) + goto ruleset_found; + + rs = create_tcpcheck_ruleset("*ssl-hello-check"); + if (rs == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + + chk = parse_tcpcheck_send((char *[]){"tcp-check", "send-binary-lf", sslv3_client_hello, ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 0; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "rbinary", "^1[56]", + "min-recv", "5", "ok-status", "L6OK", + "error-status", "L6RSP", "tout-status", "L6TOUT", + ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_SSL3_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 1; + LIST_APPEND(&rs->rules, &chk->list); + + ruleset_found: + rules->list = &rs->rules; + rules->flags &= ~(TCPCHK_RULES_PROTO_CHK|TCPCHK_RULES_UNUSED_RS); + rules->flags |= TCPCHK_RULES_SSL3_CHK; + + out: + free(errmsg); + return err_code; + + error: + free_tcpcheck_ruleset(rs); + err_code |= ERR_ALERT | ERR_FATAL; + goto out; +} + +/* Parses the "option smtpchk" proxy keyword */ +int proxy_parse_smtpchk_opt(char **args, int cur_arg, struct proxy *curpx, const struct proxy *defpx, + const char *file, int line) +{ + static char *smtp_req = "%[var(check.smtp_cmd)]\r\n"; + + struct tcpcheck_ruleset *rs = NULL; + struct tcpcheck_rules *rules = &curpx->tcpcheck_rules; + struct tcpcheck_rule *chk; + struct tcpcheck_var *var = NULL; + char *cmd = NULL, *errmsg = NULL; + int err_code = 0; + + if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[cur_arg+1], NULL)) + err_code |= ERR_WARN; + + if (alertif_too_many_args_idx(2, 1, file, line, args, &err_code)) + goto out; + + curpx->options2 &= ~PR_O2_CHK_ANY; + curpx->options2 |= PR_O2_TCPCHK_CHK; + + free_tcpcheck_vars(&rules->preset_vars); + rules->list = NULL; + rules->flags = 0; + + cur_arg += 2; + if (*args[cur_arg] && *args[cur_arg+1] && + (strcmp(args[cur_arg], "EHLO") == 0 || strcmp(args[cur_arg], "HELO") == 0)) { + /* <EHLO|HELO> + space (1) + <host> + null byte (1) */ + cmd = calloc(strlen(args[cur_arg]) + 1 + strlen(args[cur_arg+1]) + 1, sizeof(*cmd)); + if (cmd) + sprintf(cmd, "%s %s", args[cur_arg], args[cur_arg+1]); + } + else { + /* this just hits the default for now, but you could potentially expand it to allow for other stuff + though, it's unlikely you'd want to send anything other than an EHLO or HELO */ + cmd = strdup("HELO localhost"); + } + + var = create_tcpcheck_var(ist("check.smtp_cmd")); + if (cmd == NULL || var == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + var->data.type = SMP_T_STR; + var->data.u.str.area = cmd; + var->data.u.str.data = strlen(cmd); + LIST_INIT(&var->list); + LIST_APPEND(&rules->preset_vars, &var->list); + cmd = NULL; + var = NULL; + + rs = find_tcpcheck_ruleset("*smtp-check"); + if (rs) + goto ruleset_found; + + rs = create_tcpcheck_ruleset("*smtp-check"); + if (rs == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + + chk = parse_tcpcheck_connect((char *[]){"tcp-check", "connect", "default", "linger", ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 0; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "rstring", "^[0-9]{3}[ \r]", + "min-recv", "4", + "error-status", "L7RSP", + "on-error", "%[res.payload(0,0),cut_crlf]", + ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_SMTP_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 1; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "rstring", "^2[0-9]{2}[ \r]", + "min-recv", "4", + "error-status", "L7STS", + "on-error", "%[res.payload(4,0),ltrim(' '),cut_crlf]", + "status-code", "res.payload(0,3)", + ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_SMTP_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 2; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_send((char *[]){"tcp-check", "send-lf", smtp_req, ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 3; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "rstring", "^(2[0-9]{2}-[^\r]*\r\n)*2[0-9]{2}[ \r]", + "error-status", "L7STS", + "on-error", "%[res.payload(4,0),ltrim(' '),cut_crlf]", + "on-success", "%[res.payload(4,0),ltrim(' '),cut_crlf]", + "status-code", "res.payload(0,3)", + ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_SMTP_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 4; + LIST_APPEND(&rs->rules, &chk->list); + + /* Send an SMTP QUIT to ensure clean disconnect (issue 1812), and expect a 2xx response code */ + + chk = parse_tcpcheck_send((char *[]){"tcp-check", "send", "QUIT\r\n", ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 5; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "rstring", "^2[0-9]{2}[- \r]", + "min-recv", "4", + "error-status", "L7STS", + "on-error", "%[res.payload(4,0),ltrim(' '),cut_crlf]", + "on-success", "%[res.payload(4,0),ltrim(' '),cut_crlf]", + "status-code", "res.payload(0,3)", + ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_SMTP_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 6; + LIST_APPEND(&rs->rules, &chk->list); + + ruleset_found: + rules->list = &rs->rules; + rules->flags &= ~(TCPCHK_RULES_PROTO_CHK|TCPCHK_RULES_UNUSED_RS); + rules->flags |= TCPCHK_RULES_SMTP_CHK; + + out: + free(errmsg); + return err_code; + + error: + free(cmd); + free(var); + free_tcpcheck_vars(&rules->preset_vars); + free_tcpcheck_ruleset(rs); + err_code |= ERR_ALERT | ERR_FATAL; + goto out; +} + +/* Parses the "option pgsql-check" proxy keyword */ +int proxy_parse_pgsql_check_opt(char **args, int cur_arg, struct proxy *curpx, const struct proxy *defpx, + const char *file, int line) +{ + static char pgsql_req[] = { + "%[var(check.plen),htonl,hex]" /* The packet length*/ + "00030000" /* the version 3.0 */ + "7573657200" /* "user" key */ + "%[var(check.username),hex]00" /* the username */ + "00" + }; + + struct tcpcheck_ruleset *rs = NULL; + struct tcpcheck_rules *rules = &curpx->tcpcheck_rules; + struct tcpcheck_rule *chk; + struct tcpcheck_var *var = NULL; + char *user = NULL, *errmsg = NULL; + size_t packetlen = 0; + int err_code = 0; + + if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[cur_arg+1], NULL)) + err_code |= ERR_WARN; + + if (alertif_too_many_args_idx(2, 1, file, line, args, &err_code)) + goto out; + + curpx->options2 &= ~PR_O2_CHK_ANY; + curpx->options2 |= PR_O2_TCPCHK_CHK; + + free_tcpcheck_vars(&rules->preset_vars); + rules->list = NULL; + rules->flags = 0; + + cur_arg += 2; + if (!*args[cur_arg] || !*args[cur_arg+1]) { + ha_alert("parsing [%s:%d] : '%s %s' expects 'user <username>' as argument.\n", + file, line, args[0], args[1]); + goto error; + } + if (strcmp(args[cur_arg], "user") == 0) { + packetlen = 15 + strlen(args[cur_arg+1]); + user = strdup(args[cur_arg+1]); + + var = create_tcpcheck_var(ist("check.username")); + if (user == NULL || var == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + var->data.type = SMP_T_STR; + var->data.u.str.area = user; + var->data.u.str.data = strlen(user); + LIST_INIT(&var->list); + LIST_APPEND(&rules->preset_vars, &var->list); + user = NULL; + var = NULL; + + var = create_tcpcheck_var(ist("check.plen")); + if (var == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + var->data.type = SMP_T_SINT; + var->data.u.sint = packetlen; + LIST_INIT(&var->list); + LIST_APPEND(&rules->preset_vars, &var->list); + var = NULL; + } + else { + ha_alert("parsing [%s:%d] : '%s %s' only supports optional values: 'user'.\n", + file, line, args[0], args[1]); + goto error; + } + + rs = find_tcpcheck_ruleset("*pgsql-check"); + if (rs) + goto ruleset_found; + + rs = create_tcpcheck_ruleset("*pgsql-check"); + if (rs == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + + chk = parse_tcpcheck_connect((char *[]){"tcp-check", "connect", "default", "linger", ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 0; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_send((char *[]){"tcp-check", "send-binary-lf", pgsql_req, ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 1; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "!rstring", "^E", + "min-recv", "5", + "error-status", "L7RSP", + "on-error", "%[res.payload(6,0)]", + ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_PGSQL_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 2; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "rbinary", "^52000000[A-Z0-9]{2}000000(00|02|03|04|05|06|07|09|0A)", + "min-recv", "9", + "error-status", "L7STS", + "on-success", "PostgreSQL server is ok", + "on-error", "PostgreSQL unknown error", + ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_PGSQL_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 3; + LIST_APPEND(&rs->rules, &chk->list); + + ruleset_found: + rules->list = &rs->rules; + rules->flags &= ~(TCPCHK_RULES_PROTO_CHK|TCPCHK_RULES_UNUSED_RS); + rules->flags |= TCPCHK_RULES_PGSQL_CHK; + + out: + free(errmsg); + return err_code; + + error: + free(user); + free(var); + free_tcpcheck_vars(&rules->preset_vars); + free_tcpcheck_ruleset(rs); + err_code |= ERR_ALERT | ERR_FATAL; + goto out; +} + + +/* Parses the "option mysql-check" proxy keyword */ +int proxy_parse_mysql_check_opt(char **args, int cur_arg, struct proxy *curpx, const struct proxy *defpx, + const char *file, int line) +{ + /* This is an example of a MySQL >=4.0 client Authentication packet kindly provided by Cyril Bonte. + * const char mysql40_client_auth_pkt[] = { + * "\x0e\x00\x00" // packet length + * "\x01" // packet number + * "\x00\x00" // client capabilities + * "\x00\x00\x01" // max packet + * "haproxy\x00" // username (null terminated string) + * "\x00" // filler (always 0x00) + * "\x01\x00\x00" // packet length + * "\x00" // packet number + * "\x01" // COM_QUIT command + * }; + */ + static char mysql40_rsname[] = "*mysql40-check"; + static char mysql40_req[] = { + "%[var(check.header),hex]" /* 3 bytes for the packet length and 1 byte for the sequence ID */ + "0080" /* client capabilities */ + "000001" /* max packet */ + "%[var(check.username),hex]00" /* the username */ + "00" /* filler (always 0x00) */ + "010000" /* packet length*/ + "00" /* sequence ID */ + "01" /* COM_QUIT command */ + }; + + /* This is an example of a MySQL >=4.1 client Authentication packet provided by Nenad Merdanovic. + * const char mysql41_client_auth_pkt[] = { + * "\x0e\x00\x00\" // packet length + * "\x01" // packet number + * "\x00\x00\x00\x00" // client capabilities + * "\x00\x00\x00\x01" // max packet + * "\x21" // character set (UTF-8) + * char[23] // All zeroes + * "haproxy\x00" // username (null terminated string) + * "\x00" // filler (always 0x00) + * "\x01\x00\x00" // packet length + * "\x00" // packet number + * "\x01" // COM_QUIT command + * }; + */ + static char mysql41_rsname[] = "*mysql41-check"; + static char mysql41_req[] = { + "%[var(check.header),hex]" /* 3 bytes for the packet length and 1 byte for the sequence ID */ + "00820000" /* client capabilities */ + "00800001" /* max packet */ + "21" /* character set (UTF-8) */ + "000000000000000000000000" /* 23 bytes, al zeroes */ + "0000000000000000000000" + "%[var(check.username),hex]00" /* the username */ + "00" /* filler (always 0x00) */ + "010000" /* packet length*/ + "00" /* sequence ID */ + "01" /* COM_QUIT command */ + }; + + struct tcpcheck_ruleset *rs = NULL; + struct tcpcheck_rules *rules = &curpx->tcpcheck_rules; + struct tcpcheck_rule *chk; + struct tcpcheck_var *var = NULL; + char *mysql_rsname = "*mysql-check"; + char *mysql_req = NULL, *hdr = NULL, *user = NULL, *errmsg = NULL; + int index = 0, err_code = 0; + + if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[cur_arg+1], NULL)) + err_code |= ERR_WARN; + + if (alertif_too_many_args_idx(3, 1, file, line, args, &err_code)) + goto out; + + curpx->options2 &= ~PR_O2_CHK_ANY; + curpx->options2 |= PR_O2_TCPCHK_CHK; + + free_tcpcheck_vars(&rules->preset_vars); + rules->list = NULL; + rules->flags = 0; + + cur_arg += 2; + if (*args[cur_arg]) { + int packetlen, userlen; + + if (strcmp(args[cur_arg], "user") != 0) { + ha_alert("parsing [%s:%d] : '%s %s' only supports optional values: 'user' (got '%s').\n", + file, line, args[0], args[1], args[cur_arg]); + goto error; + } + + if (*(args[cur_arg+1]) == 0) { + ha_alert("parsing [%s:%d] : '%s %s %s' expects <username> as argument.\n", + file, line, args[0], args[1], args[cur_arg]); + goto error; + } + + hdr = calloc(4, sizeof(*hdr)); + user = strdup(args[cur_arg+1]); + userlen = strlen(args[cur_arg+1]); + + if (hdr == NULL || user == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + + if (!*args[cur_arg+2] || strcmp(args[cur_arg+2], "post-41") == 0) { + packetlen = userlen + 7 + 27; + mysql_req = mysql41_req; + mysql_rsname = mysql41_rsname; + } + else if (strcmp(args[cur_arg+2], "pre-41") == 0) { + packetlen = userlen + 7; + mysql_req = mysql40_req; + mysql_rsname = mysql40_rsname; + } + else { + ha_alert("parsing [%s:%d] : keyword '%s' only supports 'post-41' and 'pre-41' (got '%s').\n", + file, line, args[cur_arg], args[cur_arg+2]); + goto error; + } + + hdr[0] = (unsigned char)(packetlen & 0xff); + hdr[1] = (unsigned char)((packetlen >> 8) & 0xff); + hdr[2] = (unsigned char)((packetlen >> 16) & 0xff); + hdr[3] = 1; + + var = create_tcpcheck_var(ist("check.header")); + if (var == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + var->data.type = SMP_T_STR; + var->data.u.str.area = hdr; + var->data.u.str.data = 4; + LIST_INIT(&var->list); + LIST_APPEND(&rules->preset_vars, &var->list); + hdr = NULL; + var = NULL; + + var = create_tcpcheck_var(ist("check.username")); + if (var == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + var->data.type = SMP_T_STR; + var->data.u.str.area = user; + var->data.u.str.data = strlen(user); + LIST_INIT(&var->list); + LIST_APPEND(&rules->preset_vars, &var->list); + user = NULL; + var = NULL; + } + + rs = find_tcpcheck_ruleset(mysql_rsname); + if (rs) + goto ruleset_found; + + rs = create_tcpcheck_ruleset(mysql_rsname); + if (rs == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + + chk = parse_tcpcheck_connect((char *[]){"tcp-check", "connect", "default", "linger", ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = index++; + LIST_APPEND(&rs->rules, &chk->list); + + if (mysql_req) { + chk = parse_tcpcheck_send((char *[]){"tcp-check", "send-binary-lf", mysql_req, ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = index++; + LIST_APPEND(&rs->rules, &chk->list); + } + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "custom", ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_MYSQL_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->expect.custom = tcpcheck_mysql_expect_iniths; + chk->index = index++; + LIST_APPEND(&rs->rules, &chk->list); + + if (mysql_req) { + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "custom", ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_MYSQL_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->expect.custom = tcpcheck_mysql_expect_ok; + chk->index = index++; + LIST_APPEND(&rs->rules, &chk->list); + } + + ruleset_found: + rules->list = &rs->rules; + rules->flags &= ~(TCPCHK_RULES_PROTO_CHK|TCPCHK_RULES_UNUSED_RS); + rules->flags |= TCPCHK_RULES_MYSQL_CHK; + + out: + free(errmsg); + return err_code; + + error: + free(hdr); + free(user); + free(var); + free_tcpcheck_vars(&rules->preset_vars); + free_tcpcheck_ruleset(rs); + err_code |= ERR_ALERT | ERR_FATAL; + goto out; +} + +int proxy_parse_ldap_check_opt(char **args, int cur_arg, struct proxy *curpx, const struct proxy *defpx, + const char *file, int line) +{ + static char *ldap_req = "300C020101600702010304008000"; + + struct tcpcheck_ruleset *rs = NULL; + struct tcpcheck_rules *rules = &curpx->tcpcheck_rules; + struct tcpcheck_rule *chk; + char *errmsg = NULL; + int err_code = 0; + + if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[cur_arg+1], NULL)) + err_code |= ERR_WARN; + + if (alertif_too_many_args_idx(0, 1, file, line, args, &err_code)) + goto out; + + curpx->options2 &= ~PR_O2_CHK_ANY; + curpx->options2 |= PR_O2_TCPCHK_CHK; + + free_tcpcheck_vars(&rules->preset_vars); + rules->list = NULL; + rules->flags = 0; + + rs = find_tcpcheck_ruleset("*ldap-check"); + if (rs) + goto ruleset_found; + + rs = create_tcpcheck_ruleset("*ldap-check"); + if (rs == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + + chk = parse_tcpcheck_send((char *[]){"tcp-check", "send-binary", ldap_req, ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 0; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "rbinary", "^30", + "min-recv", "14", + "on-error", "Not LDAPv3 protocol", + ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_LDAP_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 1; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "custom", ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_LDAP_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->expect.custom = tcpcheck_ldap_expect_bindrsp; + chk->index = 2; + LIST_APPEND(&rs->rules, &chk->list); + + ruleset_found: + rules->list = &rs->rules; + rules->flags &= ~(TCPCHK_RULES_PROTO_CHK|TCPCHK_RULES_UNUSED_RS); + rules->flags |= TCPCHK_RULES_LDAP_CHK; + + out: + free(errmsg); + return err_code; + + error: + free_tcpcheck_ruleset(rs); + err_code |= ERR_ALERT | ERR_FATAL; + goto out; +} + +int proxy_parse_spop_check_opt(char **args, int cur_arg, struct proxy *curpx, const struct proxy *defpx, + const char *file, int line) +{ + struct tcpcheck_ruleset *rs = NULL; + struct tcpcheck_rules *rules = &curpx->tcpcheck_rules; + struct tcpcheck_rule *chk; + char *spop_req = NULL; + char *errmsg = NULL; + int spop_len = 0, err_code = 0; + + if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[cur_arg+1], NULL)) + err_code |= ERR_WARN; + + if (alertif_too_many_args_idx(0, 1, file, line, args, &err_code)) + goto out; + + curpx->options2 &= ~PR_O2_CHK_ANY; + curpx->options2 |= PR_O2_TCPCHK_CHK; + + free_tcpcheck_vars(&rules->preset_vars); + rules->list = NULL; + rules->flags = 0; + + + rs = find_tcpcheck_ruleset("*spop-check"); + if (rs) + goto ruleset_found; + + rs = create_tcpcheck_ruleset("*spop-check"); + if (rs == NULL) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + + if (spoe_prepare_healthcheck_request(&spop_req, &spop_len) == -1) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + chunk_reset(&trash); + dump_binary(&trash, spop_req, spop_len); + trash.area[trash.data] = '\0'; + + chk = parse_tcpcheck_send((char *[]){"tcp-check", "send-binary", b_head(&trash), ""}, + 1, curpx, &rs->rules, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->index = 0; + LIST_APPEND(&rs->rules, &chk->list); + + chk = parse_tcpcheck_expect((char *[]){"tcp-check", "expect", "custom", "min-recv", "4", ""}, + 1, curpx, &rs->rules, TCPCHK_RULES_SPOP_CHK, file, line, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : %s\n", file, line, errmsg); + goto error; + } + chk->expect.custom = tcpcheck_spop_expect_agenthello; + chk->index = 1; + LIST_APPEND(&rs->rules, &chk->list); + + ruleset_found: + rules->list = &rs->rules; + rules->flags &= ~(TCPCHK_RULES_PROTO_CHK|TCPCHK_RULES_UNUSED_RS); + rules->flags |= TCPCHK_RULES_SPOP_CHK; + + out: + free(spop_req); + free(errmsg); + return err_code; + + error: + free_tcpcheck_ruleset(rs); + err_code |= ERR_ALERT | ERR_FATAL; + goto out; +} + + +static struct tcpcheck_rule *proxy_parse_httpchk_req(char **args, int cur_arg, struct proxy *px, char **errmsg) +{ + struct tcpcheck_rule *chk = NULL; + struct tcpcheck_http_hdr *hdr = NULL; + char *meth = NULL, *uri = NULL, *vsn = NULL; + char *hdrs, *body; + + hdrs = (*args[cur_arg+2] ? strstr(args[cur_arg+2], "\r\n") : NULL); + body = (*args[cur_arg+2] ? strstr(args[cur_arg+2], "\r\n\r\n") : NULL); + if (hdrs == body) + hdrs = NULL; + if (hdrs) { + *hdrs = '\0'; + hdrs +=2; + } + if (body) { + *body = '\0'; + body += 4; + } + if (hdrs || body) { + memprintf(errmsg, "hiding headers or body at the end of the version string is deprecated." + " Please, consider to use 'http-check send' directive instead."); + } + + chk = calloc(1, sizeof(*chk)); + if (!chk) { + memprintf(errmsg, "out of memory"); + goto error; + } + chk->action = TCPCHK_ACT_SEND; + chk->send.type = TCPCHK_SEND_HTTP; + chk->send.http.flags |= TCPCHK_SND_HTTP_FROM_OPT; + chk->send.http.meth.meth = HTTP_METH_OPTIONS; + LIST_INIT(&chk->send.http.hdrs); + + /* Copy the method, uri and version */ + if (*args[cur_arg]) { + if (!*args[cur_arg+1]) + uri = args[cur_arg]; + else + meth = args[cur_arg]; + } + if (*args[cur_arg+1]) + uri = args[cur_arg+1]; + if (*args[cur_arg+2]) + vsn = args[cur_arg+2]; + + 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) { + chk->send.http.uri = ist(strdup(uri)); + if (!isttest(chk->send.http.uri)) { + memprintf(errmsg, "out of memory"); + goto error; + } + } + if (vsn) { + chk->send.http.vsn = ist(strdup(vsn)); + if (!isttest(chk->send.http.vsn)) { + memprintf(errmsg, "out of memory"); + goto error; + } + } + + /* Copy the header */ + if (hdrs) { + struct http_hdr tmp_hdrs[global.tune.max_http_hdr]; + struct h1m h1m; + int i, ret; + + /* Build and parse the request */ + chunk_printf(&trash, "%s\r\n\r\n", hdrs); + + h1m.flags = H1_MF_HDRS_ONLY; + ret = h1_headers_to_hdr_list(b_orig(&trash), b_tail(&trash), + tmp_hdrs, sizeof(tmp_hdrs)/sizeof(tmp_hdrs[0]), + &h1m, NULL); + if (ret <= 0) { + memprintf(errmsg, "unable to parse the request '%s'.", b_orig(&trash)); + goto error; + } + + for (i = 0; istlen(tmp_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(tmp_hdrs[i].n); + if (!isttest(hdr->name)) { + memprintf(errmsg, "out of memory"); + goto error; + } + + ist0(tmp_hdrs[i].v); + if (!parse_logformat_string(istptr(tmp_hdrs[i].v), px, &hdr->value, 0, SMP_VAL_BE_CHK_RUL, errmsg)) + goto error; + LIST_APPEND(&chk->send.http.hdrs, &hdr->list); + } + } + + /* Copy the body */ + if (body) { + chk->send.http.body = ist(strdup(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); + return NULL; +} + +/* Parses the "option httpchck" proxy keyword */ +int proxy_parse_httpchk_opt(char **args, int cur_arg, struct proxy *curpx, const struct proxy *defpx, + const char *file, int line) +{ + struct tcpcheck_ruleset *rs = NULL; + struct tcpcheck_rules *rules = &curpx->tcpcheck_rules; + struct tcpcheck_rule *chk; + char *errmsg = NULL; + int err_code = 0; + + if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[cur_arg+1], NULL)) + err_code |= ERR_WARN; + + if (alertif_too_many_args_idx(3, 1, file, line, args, &err_code)) + goto out; + + chk = proxy_parse_httpchk_req(args, cur_arg+2, curpx, &errmsg); + if (!chk) { + ha_alert("parsing [%s:%d] : '%s %s' : %s.\n", file, line, args[0], args[1], errmsg); + goto error; + } + if (errmsg) { + ha_warning("parsing [%s:%d]: '%s %s' : %s\n", file, line, args[0], args[1], errmsg); + err_code |= ERR_WARN; + ha_free(&errmsg); + } + + no_request: + curpx->options2 &= ~PR_O2_CHK_ANY; + curpx->options2 |= PR_O2_TCPCHK_CHK; + + free_tcpcheck_vars(&rules->preset_vars); + rules->list = NULL; + rules->flags |= TCPCHK_SND_HTTP_FROM_OPT; + + /* Deduce the ruleset name from the proxy info */ + chunk_printf(&trash, "*http-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) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + } + + rules->list = &rs->rules; + rules->flags &= ~(TCPCHK_RULES_PROTO_CHK|TCPCHK_RULES_UNUSED_RS); + rules->flags |= TCPCHK_RULES_HTTP_CHK; + if (!tcpcheck_add_http_rule(chk, rules, &errmsg)) { + ha_alert("parsing [%s:%d] : '%s %s' : %s.\n", file, line, args[0], args[1], errmsg); + rules->list = NULL; + goto error; + } + + out: + free(errmsg); + return err_code; + + error: + free_tcpcheck_ruleset(rs); + free_tcpcheck(chk, 0); + err_code |= ERR_ALERT | ERR_FATAL; + goto out; +} + +/* Parses the "option tcp-check" proxy keyword */ +int proxy_parse_tcp_check_opt(char **args, int cur_arg, struct proxy *curpx, const struct proxy *defpx, + const char *file, int line) +{ + struct tcpcheck_ruleset *rs = NULL; + struct tcpcheck_rules *rules = &curpx->tcpcheck_rules; + int err_code = 0; + + if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[cur_arg+1], NULL)) + err_code |= ERR_WARN; + + if (alertif_too_many_args_idx(0, 1, file, line, args, &err_code)) + goto out; + + curpx->options2 &= ~PR_O2_CHK_ANY; + curpx->options2 |= PR_O2_TCPCHK_CHK; + + if ((rules->flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_TCP_CHK) { + /* If a tcp-check rulesset is already set, do nothing */ + if (rules->list) + goto out; + + /* If a tcp-check ruleset is waiting to be used for the current proxy, + * get it. + */ + if (rules->flags & TCPCHK_RULES_UNUSED_TCP_RS) + goto curpx_ruleset; + + /* Otherwise, try to get the tcp-check ruleset of the default proxy */ + chunk_printf(&trash, "*tcp-check-defaults_%s-%d", defpx->conf.file, defpx->conf.line); + rs = find_tcpcheck_ruleset(b_orig(&trash)); + if (rs) + goto ruleset_found; + } + + curpx_ruleset: + /* 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) { + ha_alert("parsing [%s:%d] : out of memory.\n", file, line); + goto error; + } + } + + ruleset_found: + free_tcpcheck_vars(&rules->preset_vars); + rules->list = &rs->rules; + rules->flags &= ~(TCPCHK_RULES_PROTO_CHK|TCPCHK_RULES_UNUSED_RS); + rules->flags |= TCPCHK_RULES_TCP_CHK; + + out: + return err_code; + + error: + err_code |= ERR_ALERT | ERR_FATAL; + goto out; +} + +static struct cfg_kw_list cfg_kws = {ILH, { + { CFG_LISTEN, "http-check", proxy_parse_httpcheck }, + { 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); |