blob: accc699ff15c6e37ebd046d3b0047556f69bb305 [file] [log] [blame]
Willy Tarreau51cd5952020-06-05 12:25:38 +02001/*
2 * Health-checks functions.
3 *
4 * Copyright 2000-2009,2020 Willy Tarreau <w@1wt.eu>
5 * Copyright 2007-2010 Krzysztof Piotr Oledzki <ole@ans.pl>
6 * Copyright 2013 Baptiste Assmann <bedis9@gmail.com>
7 * Copyright 2020 Gaetan Rivet <grive@u256.net>
8 * Copyright 2020 Christopher Faulet <cfaulet@haproxy.com>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 */
16
17#include <sys/resource.h>
18#include <sys/socket.h>
19#include <sys/types.h>
20#include <sys/wait.h>
21#include <netinet/in.h>
22#include <netinet/tcp.h>
23#include <arpa/inet.h>
24
25#include <ctype.h>
26#include <errno.h>
27#include <fcntl.h>
28#include <signal.h>
29#include <stdarg.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33#include <time.h>
34#include <unistd.h>
35
36#include <haproxy/action.h>
37#include <haproxy/api.h>
38#include <haproxy/cfgparse.h>
39#include <haproxy/check.h>
40#include <haproxy/chunk.h>
41#include <haproxy/connection.h>
Willy Tarreau36979d92020-06-05 17:27:29 +020042#include <haproxy/errors.h>
Willy Tarreau51cd5952020-06-05 12:25:38 +020043#include <haproxy/global.h>
44#include <haproxy/h1.h>
45#include <haproxy/http.h>
46#include <haproxy/http_htx.h>
47#include <haproxy/htx.h>
48#include <haproxy/istbuf.h>
49#include <haproxy/list.h>
50#include <haproxy/log.h>
Willy Tarreau51cd5952020-06-05 12:25:38 +020051#include <haproxy/protocol.h>
52#include <haproxy/proxy-t.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020053#include <haproxy/regex.h>
54#include <haproxy/sample.h>
Willy Tarreau51cd5952020-06-05 12:25:38 +020055#include <haproxy/server.h>
56#include <haproxy/ssl_sock.h>
Willy Tarreau51cd5952020-06-05 12:25:38 +020057#include <haproxy/task.h>
58#include <haproxy/tcpcheck.h>
Willy Tarreaub2551052020-06-09 09:07:15 +020059#include <haproxy/time.h>
60#include <haproxy/tools.h>
Willy Tarreau51cd5952020-06-05 12:25:38 +020061#include <haproxy/vars.h>
62
63
64/* Global tree to share all tcp-checks */
65struct eb_root shared_tcpchecks = EB_ROOT;
66
67
68DECLARE_POOL(pool_head_tcpcheck_rule, "tcpcheck_rule", sizeof(struct tcpcheck_rule));
69
70/**************************************************************************/
71/*************** Init/deinit tcp-check rules and ruleset ******************/
72/**************************************************************************/
73/* Releases memory allocated for a log-format string */
74static void free_tcpcheck_fmt(struct list *fmt)
75{
76 struct logformat_node *lf, *lfb;
77
78 list_for_each_entry_safe(lf, lfb, fmt, list) {
79 LIST_DEL(&lf->list);
80 release_sample_expr(lf->expr);
81 free(lf->arg);
82 free(lf);
83 }
84}
85
86/* Releases memory allocated for an HTTP header used in a tcp-check send rule */
87void free_tcpcheck_http_hdr(struct tcpcheck_http_hdr *hdr)
88{
89 if (!hdr)
90 return;
91
92 free_tcpcheck_fmt(&hdr->value);
93 istfree(&hdr->name);
94 free(hdr);
95}
96
97/* Releases memory allocated for an HTTP header list used in a tcp-check send
98 * rule
99 */
100static void free_tcpcheck_http_hdrs(struct list *hdrs)
101{
102 struct tcpcheck_http_hdr *hdr, *bhdr;
103
104 list_for_each_entry_safe(hdr, bhdr, hdrs, list) {
105 LIST_DEL(&hdr->list);
106 free_tcpcheck_http_hdr(hdr);
107 }
108}
109
110/* Releases memory allocated for a tcp-check. If in_pool is set, it means the
111 * tcp-check was allocated using a memory pool (it is used to instantiate email
112 * alerts).
113 */
114void free_tcpcheck(struct tcpcheck_rule *rule, int in_pool)
115{
116 if (!rule)
117 return;
118
119 free(rule->comment);
120 switch (rule->action) {
121 case TCPCHK_ACT_SEND:
122 switch (rule->send.type) {
123 case TCPCHK_SEND_STRING:
124 case TCPCHK_SEND_BINARY:
125 istfree(&rule->send.data);
126 break;
127 case TCPCHK_SEND_STRING_LF:
128 case TCPCHK_SEND_BINARY_LF:
129 free_tcpcheck_fmt(&rule->send.fmt);
130 break;
131 case TCPCHK_SEND_HTTP:
132 free(rule->send.http.meth.str.area);
133 if (!(rule->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT))
134 istfree(&rule->send.http.uri);
135 else
136 free_tcpcheck_fmt(&rule->send.http.uri_fmt);
137 istfree(&rule->send.http.vsn);
138 free_tcpcheck_http_hdrs(&rule->send.http.hdrs);
139 if (!(rule->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT))
140 istfree(&rule->send.http.body);
141 else
142 free_tcpcheck_fmt(&rule->send.http.body_fmt);
143 break;
144 case TCPCHK_SEND_UNDEF:
145 break;
146 }
147 break;
148 case TCPCHK_ACT_EXPECT:
149 free_tcpcheck_fmt(&rule->expect.onerror_fmt);
150 free_tcpcheck_fmt(&rule->expect.onsuccess_fmt);
151 release_sample_expr(rule->expect.status_expr);
152 switch (rule->expect.type) {
153 case TCPCHK_EXPECT_HTTP_STATUS:
154 free(rule->expect.codes.codes);
155 break;
156 case TCPCHK_EXPECT_STRING:
157 case TCPCHK_EXPECT_BINARY:
158 case TCPCHK_EXPECT_HTTP_BODY:
159 istfree(&rule->expect.data);
160 break;
161 case TCPCHK_EXPECT_STRING_REGEX:
162 case TCPCHK_EXPECT_BINARY_REGEX:
163 case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
164 case TCPCHK_EXPECT_HTTP_BODY_REGEX:
165 regex_free(rule->expect.regex);
166 break;
167 case TCPCHK_EXPECT_STRING_LF:
168 case TCPCHK_EXPECT_BINARY_LF:
169 case TCPCHK_EXPECT_HTTP_BODY_LF:
170 free_tcpcheck_fmt(&rule->expect.fmt);
171 break;
172 case TCPCHK_EXPECT_HTTP_HEADER:
173 if (rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_REG)
174 regex_free(rule->expect.hdr.name_re);
175 else if (rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT)
176 free_tcpcheck_fmt(&rule->expect.hdr.name_fmt);
177 else
178 istfree(&rule->expect.hdr.name);
179
180 if (rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_REG)
181 regex_free(rule->expect.hdr.value_re);
182 else if (rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT)
183 free_tcpcheck_fmt(&rule->expect.hdr.value_fmt);
184 else if (!(rule->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_NONE))
185 istfree(&rule->expect.hdr.value);
186 break;
187 case TCPCHK_EXPECT_CUSTOM:
188 case TCPCHK_EXPECT_UNDEF:
189 break;
190 }
191 break;
192 case TCPCHK_ACT_CONNECT:
193 free(rule->connect.sni);
194 free(rule->connect.alpn);
195 release_sample_expr(rule->connect.port_expr);
196 break;
197 case TCPCHK_ACT_COMMENT:
198 break;
199 case TCPCHK_ACT_ACTION_KW:
200 free(rule->action_kw.rule);
201 break;
202 }
203
204 if (in_pool)
205 pool_free(pool_head_tcpcheck_rule, rule);
206 else
207 free(rule);
208}
209
210/* Creates a tcp-check variable used in preset variables before executing a
211 * tcp-check ruleset.
212 */
213struct tcpcheck_var *create_tcpcheck_var(const struct ist name)
214{
215 struct tcpcheck_var *var = NULL;
216
217 var = calloc(1, sizeof(*var));
218 if (var == NULL)
219 return NULL;
220
221 var->name = istdup(name);
222 if (!isttest(var->name)) {
223 free(var);
224 return NULL;
225 }
226
227 LIST_INIT(&var->list);
228 return var;
229}
230
231/* Releases memory allocated for a preset tcp-check variable */
232void free_tcpcheck_var(struct tcpcheck_var *var)
233{
234 if (!var)
235 return;
236
237 istfree(&var->name);
238 if (var->data.type == SMP_T_STR || var->data.type == SMP_T_BIN)
239 free(var->data.u.str.area);
240 else if (var->data.type == SMP_T_METH && var->data.u.meth.meth == HTTP_METH_OTHER)
241 free(var->data.u.meth.str.area);
242 free(var);
243}
244
245/* Releases a list of preset tcp-check variables */
246void free_tcpcheck_vars(struct list *vars)
247{
248 struct tcpcheck_var *var, *back;
249
250 list_for_each_entry_safe(var, back, vars, list) {
251 LIST_DEL(&var->list);
252 free_tcpcheck_var(var);
253 }
254}
255
256/* Duplicate a list of preset tcp-check variables */
257int dup_tcpcheck_vars(struct list *dst, struct list *src)
258{
259 struct tcpcheck_var *var, *new = NULL;
260
261 list_for_each_entry(var, src, list) {
262 new = create_tcpcheck_var(var->name);
263 if (!new)
264 goto error;
265 new->data.type = var->data.type;
266 if (var->data.type == SMP_T_STR || var->data.type == SMP_T_BIN) {
267 if (chunk_dup(&new->data.u.str, &var->data.u.str) == NULL)
268 goto error;
269 if (var->data.type == SMP_T_STR)
270 new->data.u.str.area[new->data.u.str.data] = 0;
271 }
272 else if (var->data.type == SMP_T_METH && var->data.u.meth.meth == HTTP_METH_OTHER) {
273 if (chunk_dup(&new->data.u.str, &var->data.u.str) == NULL)
274 goto error;
275 new->data.u.str.area[new->data.u.str.data] = 0;
276 new->data.u.meth.meth = var->data.u.meth.meth;
277 }
278 else
279 new->data.u = var->data.u;
280 LIST_ADDQ(dst, &new->list);
281 }
282 return 1;
283
284 error:
285 free(new);
286 return 0;
287}
288
289/* Looks for a shared tcp-check ruleset given its name. */
290struct tcpcheck_ruleset *find_tcpcheck_ruleset(const char *name)
291{
292 struct tcpcheck_ruleset *rs;
293 struct ebpt_node *node;
294
295 node = ebis_lookup_len(&shared_tcpchecks, name, strlen(name));
296 if (node) {
297 rs = container_of(node, typeof(*rs), node);
298 return rs;
299 }
300 return NULL;
301}
302
303/* Creates a new shared tcp-check ruleset and insert it in shared_tcpchecks
304 * tree.
305 */
306struct tcpcheck_ruleset *create_tcpcheck_ruleset(const char *name)
307{
308 struct tcpcheck_ruleset *rs;
309
310 rs = calloc(1, sizeof(*rs));
311 if (rs == NULL)
312 return NULL;
313
314 rs->node.key = strdup(name);
315 if (rs->node.key == NULL) {
316 free(rs);
317 return NULL;
318 }
319
320 LIST_INIT(&rs->rules);
321 ebis_insert(&shared_tcpchecks, &rs->node);
322 return rs;
323}
324
325/* Releases memory allocated by a tcp-check ruleset. */
326void free_tcpcheck_ruleset(struct tcpcheck_ruleset *rs)
327{
328 struct tcpcheck_rule *r, *rb;
329
330 if (!rs)
331 return;
332
333 ebpt_delete(&rs->node);
334 free(rs->node.key);
335 list_for_each_entry_safe(r, rb, &rs->rules, list) {
336 LIST_DEL(&r->list);
337 free_tcpcheck(r, 0);
338 }
339 free(rs);
340}
341
342
343/**************************************************************************/
344/**************** Everything about tcp-checks execution *******************/
345/**************************************************************************/
346/* Returns the id of a step in a tcp-check ruleset */
347int tcpcheck_get_step_id(struct check *check, struct tcpcheck_rule *rule)
348{
349 if (!rule)
350 rule = check->current_step;
351
352 /* no last started step => first step */
353 if (!rule)
354 return 1;
355
356 /* last step is the first implicit connect */
357 if (rule->index == 0 &&
358 rule->action == TCPCHK_ACT_CONNECT &&
359 (rule->connect.options & TCPCHK_OPT_IMPLICIT))
360 return 0;
361
362 return rule->index + 1;
363}
364
365/* Returns the first non COMMENT/ACTION_KW tcp-check rule from list <list> or
366 * NULL if none was found.
367 */
368struct tcpcheck_rule *get_first_tcpcheck_rule(struct tcpcheck_rules *rules)
369{
370 struct tcpcheck_rule *r;
371
372 list_for_each_entry(r, rules->list, list) {
373 if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW)
374 return r;
375 }
376 return NULL;
377}
378
379/* Returns the last non COMMENT/ACTION_KW tcp-check rule from list <list> or
380 * NULL if none was found.
381 */
382static struct tcpcheck_rule *get_last_tcpcheck_rule(struct tcpcheck_rules *rules)
383{
384 struct tcpcheck_rule *r;
385
386 list_for_each_entry_rev(r, rules->list, list) {
387 if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW)
388 return r;
389 }
390 return NULL;
391}
392
393/* Returns the non COMMENT/ACTION_KW tcp-check rule from list <list> following
394 * <start> or NULL if non was found. If <start> is NULL, it relies on
395 * get_first_tcpcheck_rule().
396 */
397static struct tcpcheck_rule *get_next_tcpcheck_rule(struct tcpcheck_rules *rules, struct tcpcheck_rule *start)
398{
399 struct tcpcheck_rule *r;
400
401 if (!start)
402 return get_first_tcpcheck_rule(rules);
403
404 r = LIST_NEXT(&start->list, typeof(r), list);
405 list_for_each_entry_from(r, rules->list, list) {
406 if (r->action != TCPCHK_ACT_COMMENT && r->action != TCPCHK_ACT_ACTION_KW)
407 return r;
408 }
409 return NULL;
410}
411
412
413/* Creates info message when a tcp-check healthcheck fails on an expect rule */
414static void tcpcheck_expect_onerror_message(struct buffer *msg, struct check *check, struct tcpcheck_rule *rule,
415 int match, struct ist info)
416{
417 struct sample *smp;
418
419 /* Follows these step to produce the info message:
420 * 1. if info field is already provided, copy it
421 * 2. if the expect rule provides an onerror log-format string,
422 * use it to produce the message
423 * 3. the expect rule is part of a protocol check (http, redis, mysql...), do nothing
424 * 4. Otherwise produce the generic tcp-check info message
425 */
426 if (istlen(info)) {
427 chunk_strncat(msg, istptr(info), istlen(info));
428 goto comment;
429 }
430 else if (!LIST_ISEMPTY(&rule->expect.onerror_fmt)) {
431 msg->data += sess_build_logline(check->sess, NULL, b_tail(msg), b_room(msg), &rule->expect.onerror_fmt);
432 goto comment;
433 }
434
435 if (check->type == PR_O2_TCPCHK_CHK &&
436 (check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) != TCPCHK_RULES_TCP_CHK)
437 goto comment;
438
439 chunk_strcat(msg, (match ? "TCPCHK matched unwanted content" : "TCPCHK did not match content"));
440 switch (rule->expect.type) {
441 case TCPCHK_EXPECT_HTTP_STATUS:
442 chunk_appendf(msg, "(status codes) at step %d", tcpcheck_get_step_id(check, rule));
443 break;
444 case TCPCHK_EXPECT_STRING:
445 case TCPCHK_EXPECT_HTTP_BODY:
446 chunk_appendf(msg, " '%.*s' at step %d", (unsigned int)istlen(rule->expect.data), istptr(rule->expect.data),
447 tcpcheck_get_step_id(check, rule));
448 break;
449 case TCPCHK_EXPECT_BINARY:
450 chunk_appendf(msg, " (binary) at step %d", tcpcheck_get_step_id(check, rule));
451 break;
452 case TCPCHK_EXPECT_STRING_REGEX:
453 case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
454 case TCPCHK_EXPECT_HTTP_BODY_REGEX:
455 chunk_appendf(msg, " (regex) at step %d", tcpcheck_get_step_id(check, rule));
456 break;
457 case TCPCHK_EXPECT_BINARY_REGEX:
458 chunk_appendf(msg, " (binary regex) at step %d", tcpcheck_get_step_id(check, rule));
459 break;
460 case TCPCHK_EXPECT_STRING_LF:
461 case TCPCHK_EXPECT_HTTP_BODY_LF:
462 chunk_appendf(msg, " (log-format string) at step %d", tcpcheck_get_step_id(check, rule));
463 break;
464 case TCPCHK_EXPECT_BINARY_LF:
465 chunk_appendf(msg, " (log-format binary) at step %d", tcpcheck_get_step_id(check, rule));
466 break;
467 case TCPCHK_EXPECT_CUSTOM:
468 chunk_appendf(msg, " (custom function) at step %d", tcpcheck_get_step_id(check, rule));
469 break;
470 case TCPCHK_EXPECT_HTTP_HEADER:
471 chunk_appendf(msg, " (header pattern) at step %d", tcpcheck_get_step_id(check, rule));
472 case TCPCHK_EXPECT_UNDEF:
473 /* Should never happen. */
474 return;
475 }
476
477 comment:
478 /* If the failing expect rule provides a comment, it is concatenated to
479 * the info message.
480 */
481 if (rule->comment) {
482 chunk_strcat(msg, " comment: ");
483 chunk_strcat(msg, rule->comment);
484 }
485
486 /* Finally, the check status code is set if the failing expect rule
487 * defines a status expression.
488 */
489 if (rule->expect.status_expr) {
490 smp = sample_fetch_as_type(check->proxy, check->sess, NULL, SMP_OPT_DIR_RES | SMP_OPT_FINAL,
491 rule->expect.status_expr, SMP_T_STR);
492
493 if (smp && sample_casts[smp->data.type][SMP_T_SINT] &&
494 sample_casts[smp->data.type][SMP_T_SINT](smp))
495 check->code = smp->data.u.sint;
496 }
497
498 *(b_tail(msg)) = '\0';
499}
500
501/* Creates info message when a tcp-check healthcheck succeeds on an expect rule */
502static void tcpcheck_expect_onsuccess_message(struct buffer *msg, struct check *check, struct tcpcheck_rule *rule,
503 struct ist info)
504{
505 struct sample *smp;
506
507 /* Follows these step to produce the info message:
508 * 1. if info field is already provided, copy it
509 * 2. if the expect rule provides an onsucces log-format string,
510 * use it to produce the message
511 * 3. the expect rule is part of a protocol check (http, redis, mysql...), do nothing
512 * 4. Otherwise produce the generic tcp-check info message
513 */
514 if (istlen(info))
515 chunk_strncat(msg, istptr(info), istlen(info));
516 if (!LIST_ISEMPTY(&rule->expect.onsuccess_fmt))
517 msg->data += sess_build_logline(check->sess, NULL, b_tail(msg), b_room(msg),
518 &rule->expect.onsuccess_fmt);
519 else if (check->type == PR_O2_TCPCHK_CHK &&
520 (check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_TCP_CHK)
521 chunk_strcat(msg, "(tcp-check)");
522
523 /* Finally, the check status code is set if the expect rule defines a
524 * status expression.
525 */
526 if (rule->expect.status_expr) {
527 smp = sample_fetch_as_type(check->proxy, check->sess, NULL, SMP_OPT_DIR_RES | SMP_OPT_FINAL,
528 rule->expect.status_expr, SMP_T_STR);
529
530 if (smp && sample_casts[smp->data.type][SMP_T_SINT] &&
531 sample_casts[smp->data.type][SMP_T_SINT](smp))
532 check->code = smp->data.u.sint;
533 }
534
535 *(b_tail(msg)) = '\0';
536}
537
538/* Internal functions to parse and validate a MySQL packet in the context of an
539 * expect rule. It start to parse the input buffer at the offset <offset>. If
540 * <last_read> is set, no more data are expected.
541 */
542static enum tcpcheck_eval_ret tcpcheck_mysql_expect_packet(struct check *check, struct tcpcheck_rule *rule,
543 unsigned int offset, int last_read)
544{
545 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
546 enum healthcheck_status status;
547 struct buffer *msg = NULL;
548 struct ist desc = IST_NULL;
549 unsigned int err = 0, plen = 0;
550
551
552 /* 3 Bytes for the packet length and 1 byte for the sequence id */
553 if (b_data(&check->bi) < offset+4) {
554 if (!last_read)
555 goto wait_more_data;
556
557 /* invalid length or truncated response */
558 status = HCHK_STATUS_L7RSP;
559 goto error;
560 }
561
562 plen = ((unsigned char) *b_peek(&check->bi, offset)) +
563 (((unsigned char) *(b_peek(&check->bi, offset+1))) << 8) +
564 (((unsigned char) *(b_peek(&check->bi, offset+2))) << 16);
565
566 if (b_data(&check->bi) < offset+plen+4) {
567 if (!last_read)
568 goto wait_more_data;
569
570 /* invalid length or truncated response */
571 status = HCHK_STATUS_L7RSP;
572 goto error;
573 }
574
575 if (*b_peek(&check->bi, offset+4) == '\xff') {
576 /* MySQL Error packet always begin with field_count = 0xff */
577 status = HCHK_STATUS_L7STS;
578 err = ((unsigned char) *b_peek(&check->bi, offset+5)) +
579 (((unsigned char) *(b_peek(&check->bi, offset+6))) << 8);
580 desc = ist2(b_peek(&check->bi, offset+7), b_data(&check->bi) - offset - 7);
581 goto error;
582 }
583
584 if (get_next_tcpcheck_rule(check->tcpcheck_rules, rule) != NULL) {
585 /* Not the last rule, continue */
586 goto out;
587 }
588
589 /* We set the MySQL Version in description for information purpose
590 * FIXME : it can be cool to use MySQL Version for other purpose,
591 * like mark as down old MySQL server.
592 */
593 status = ((rule->expect.ok_status != HCHK_STATUS_UNKNOWN) ? rule->expect.ok_status : HCHK_STATUS_L7OKD);
594 set_server_check_status(check, status, b_peek(&check->bi, 5));
595
596 out:
597 free_trash_chunk(msg);
598 return ret;
599
600 error:
601 ret = TCPCHK_EVAL_STOP;
602 check->code = err;
603 msg = alloc_trash_chunk();
604 if (msg)
605 tcpcheck_expect_onerror_message(msg, check, rule, 0, desc);
606 set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
607 goto out;
608
609 wait_more_data:
610 ret = TCPCHK_EVAL_WAIT;
611 goto out;
612}
613
614/* Custom tcp-check expect function to parse and validate the MySQL initial
615 * handshake packet. Returns TCPCHK_EVAL_WAIT to wait for more data,
616 * TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP if an
617 * error occurred.
618 */
619enum tcpcheck_eval_ret tcpcheck_mysql_expect_iniths(struct check *check, struct tcpcheck_rule *rule, int last_read)
620{
621 return tcpcheck_mysql_expect_packet(check, rule, 0, last_read);
622}
623
624/* Custom tcp-check expect function to parse and validate the MySQL OK packet
625 * following the initial handshake. Returns TCPCHK_EVAL_WAIT to wait for more
626 * data, TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP if
627 * an error occurred.
628 */
629enum tcpcheck_eval_ret tcpcheck_mysql_expect_ok(struct check *check, struct tcpcheck_rule *rule, int last_read)
630{
631 unsigned int hslen = 0;
632
633 hslen = 4 + ((unsigned char) *b_head(&check->bi)) +
634 (((unsigned char) *(b_peek(&check->bi, 1))) << 8) +
635 (((unsigned char) *(b_peek(&check->bi, 2))) << 16);
636
637 return tcpcheck_mysql_expect_packet(check, rule, hslen, last_read);
638}
639
640/* Custom tcp-check expect function to parse and validate the LDAP bind response
641 * package packet. Returns TCPCHK_EVAL_WAIT to wait for more data,
642 * TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP if an
643 * error occurred.
644 */
645enum tcpcheck_eval_ret tcpcheck_ldap_expect_bindrsp(struct check *check, struct tcpcheck_rule *rule, int last_read)
646{
647 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
648 enum healthcheck_status status;
649 struct buffer *msg = NULL;
650 struct ist desc = IST_NULL;
651 unsigned short msglen = 0;
652
653 /* Check if the server speaks LDAP (ASN.1/BER)
654 * http://en.wikipedia.org/wiki/Basic_Encoding_Rules
655 * http://tools.ietf.org/html/rfc4511
656 */
657 /* size of LDAPMessage */
658 msglen = (*(b_head(&check->bi) + 1) & 0x80) ? (*(b_head(&check->bi) + 1) & 0x7f) : 0;
659
660 /* http://tools.ietf.org/html/rfc4511#section-4.2.2
661 * messageID: 0x02 0x01 0x01: INTEGER 1
662 * protocolOp: 0x61: bindResponse
663 */
664 if ((msglen > 2) || (memcmp(b_head(&check->bi) + 2 + msglen, "\x02\x01\x01\x61", 4) != 0)) {
665 status = HCHK_STATUS_L7RSP;
666 desc = ist("Not LDAPv3 protocol");
667 goto error;
668 }
669
670 /* size of bindResponse */
671 msglen += (*(b_head(&check->bi) + msglen + 6) & 0x80) ? (*(b_head(&check->bi) + msglen + 6) & 0x7f) : 0;
672
673 /* http://tools.ietf.org/html/rfc4511#section-4.1.9
674 * ldapResult: 0x0a 0x01: ENUMERATION
675 */
676 if ((msglen > 4) || (memcmp(b_head(&check->bi) + 7 + msglen, "\x0a\x01", 2) != 0)) {
677 status = HCHK_STATUS_L7RSP;
678 desc = ist("Not LDAPv3 protocol");
679 goto error;
680 }
681
682 /* http://tools.ietf.org/html/rfc4511#section-4.1.9
683 * resultCode
684 */
685 check->code = *(b_head(&check->bi) + msglen + 9);
686 if (check->code) {
687 status = HCHK_STATUS_L7STS;
688 desc = ist("See RFC: http://tools.ietf.org/html/rfc4511#section-4.1.9");
689 goto error;
690 }
691
692 status = ((rule->expect.ok_status != HCHK_STATUS_UNKNOWN) ? rule->expect.ok_status : HCHK_STATUS_L7OKD);
693 set_server_check_status(check, status, "Success");
694
695 out:
696 free_trash_chunk(msg);
697 return ret;
698
699 error:
700 ret = TCPCHK_EVAL_STOP;
701 msg = alloc_trash_chunk();
702 if (msg)
703 tcpcheck_expect_onerror_message(msg, check, rule, 0, desc);
704 set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
705 goto out;
706}
707
708/* Custom tcp-check expect function to parse and validate the SPOP hello agent
709 * frame. Returns TCPCHK_EVAL_WAIT to wait for more data, TCPCHK_EVAL_CONTINUE
710 * to evaluate the next rule or TCPCHK_EVAL_STOP if an error occurred.
711 */
712enum tcpcheck_eval_ret tcpcheck_spop_expect_agenthello(struct check *check, struct tcpcheck_rule *rule, int last_read)
713{
714 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
715 enum healthcheck_status status;
716 struct buffer *msg = NULL;
717 struct ist desc = IST_NULL;
718 unsigned int framesz;
719
720
721 memcpy(&framesz, b_head(&check->bi), 4);
722 framesz = ntohl(framesz);
723
724 if (!last_read && b_data(&check->bi) < (4+framesz))
725 goto wait_more_data;
726
727 memset(b_orig(&trash), 0, b_size(&trash));
728 if (spoe_handle_healthcheck_response(b_peek(&check->bi, 4), framesz, b_orig(&trash), HCHK_DESC_LEN) == -1) {
729 status = HCHK_STATUS_L7RSP;
730 desc = ist2(b_orig(&trash), strlen(b_orig(&trash)));
731 goto error;
732 }
733
734 status = ((rule->expect.ok_status != HCHK_STATUS_UNKNOWN) ? rule->expect.ok_status : HCHK_STATUS_L7OKD);
735 set_server_check_status(check, status, "SPOA server is ok");
736
737 out:
738 free_trash_chunk(msg);
739 return ret;
740
741 error:
742 ret = TCPCHK_EVAL_STOP;
743 msg = alloc_trash_chunk();
744 if (msg)
745 tcpcheck_expect_onerror_message(msg, check, rule, 0, desc);
746 set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
747 goto out;
748
749 wait_more_data:
750 ret = TCPCHK_EVAL_WAIT;
751 goto out;
752}
753
754/* Custom tcp-check expect function to parse and validate the agent-check
755 * reply. Returns TCPCHK_EVAL_WAIT to wait for more data, TCPCHK_EVAL_CONTINUE
756 * to evaluate the next rule or TCPCHK_EVAL_STOP if an error occurred.
757 */
758enum tcpcheck_eval_ret tcpcheck_agent_expect_reply(struct check *check, struct tcpcheck_rule *rule, int last_read)
759{
760 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_STOP;
761 enum healthcheck_status status = HCHK_STATUS_CHECKED;
762 const char *hs = NULL; /* health status */
763 const char *as = NULL; /* admin status */
764 const char *ps = NULL; /* performance status */
765 const char *cs = NULL; /* maxconn */
766 const char *err = NULL; /* first error to report */
767 const char *wrn = NULL; /* first warning to report */
768 char *cmd, *p;
769
770 /* We're getting an agent check response. The agent could
771 * have been disabled in the mean time with a long check
772 * still pending. It is important that we ignore the whole
773 * response.
774 */
775 if (!(check->state & CHK_ST_ENABLED))
776 goto out;
777
778 /* The agent supports strings made of a single line ended by the
779 * first CR ('\r') or LF ('\n'). This line is composed of words
780 * delimited by spaces (' '), tabs ('\t'), or commas (','). The
781 * line may optionally contained a description of a state change
782 * after a sharp ('#'), which is only considered if a health state
783 * is announced.
784 *
785 * Words may be composed of :
786 * - a numeric weight suffixed by the percent character ('%').
787 * - a health status among "up", "down", "stopped", and "fail".
788 * - an admin status among "ready", "drain", "maint".
789 *
790 * These words may appear in any order. If multiple words of the
791 * same category appear, the last one wins.
792 */
793
794 p = b_head(&check->bi);
795 while (*p && *p != '\n' && *p != '\r')
796 p++;
797
798 if (!*p) {
799 if (!last_read)
800 goto wait_more_data;
801
802 /* at least inform the admin that the agent is mis-behaving */
803 set_server_check_status(check, check->status, "Ignoring incomplete line from agent");
804 goto out;
805 }
806
807 *p = 0;
808 cmd = b_head(&check->bi);
809
810 while (*cmd) {
811 /* look for next word */
812 if (*cmd == ' ' || *cmd == '\t' || *cmd == ',') {
813 cmd++;
814 continue;
815 }
816
817 if (*cmd == '#') {
818 /* this is the beginning of a health status description,
819 * skip the sharp and blanks.
820 */
821 cmd++;
822 while (*cmd == '\t' || *cmd == ' ')
823 cmd++;
824 break;
825 }
826
827 /* find the end of the word so that we have a null-terminated
828 * word between <cmd> and <p>.
829 */
830 p = cmd + 1;
831 while (*p && *p != '\t' && *p != ' ' && *p != '\n' && *p != ',')
832 p++;
833 if (*p)
834 *p++ = 0;
835
836 /* first, health statuses */
837 if (strcasecmp(cmd, "up") == 0) {
838 check->server->check.health = check->server->check.rise + check->server->check.fall - 1;
839 status = HCHK_STATUS_L7OKD;
840 hs = cmd;
841 }
842 else if (strcasecmp(cmd, "down") == 0) {
843 check->server->check.health = 0;
844 status = HCHK_STATUS_L7STS;
845 hs = cmd;
846 }
847 else if (strcasecmp(cmd, "stopped") == 0) {
848 check->server->check.health = 0;
849 status = HCHK_STATUS_L7STS;
850 hs = cmd;
851 }
852 else if (strcasecmp(cmd, "fail") == 0) {
853 check->server->check.health = 0;
854 status = HCHK_STATUS_L7STS;
855 hs = cmd;
856 }
857 /* admin statuses */
858 else if (strcasecmp(cmd, "ready") == 0) {
859 as = cmd;
860 }
861 else if (strcasecmp(cmd, "drain") == 0) {
862 as = cmd;
863 }
864 else if (strcasecmp(cmd, "maint") == 0) {
865 as = cmd;
866 }
867 /* try to parse a weight here and keep the last one */
868 else if (isdigit((unsigned char)*cmd) && strchr(cmd, '%') != NULL) {
869 ps = cmd;
870 }
871 /* try to parse a maxconn here */
872 else if (strncasecmp(cmd, "maxconn:", strlen("maxconn:")) == 0) {
873 cs = cmd;
874 }
875 else {
876 /* keep a copy of the first error */
877 if (!err)
878 err = cmd;
879 }
880 /* skip to next word */
881 cmd = p;
882 }
883 /* here, cmd points either to \0 or to the beginning of a
884 * description. Skip possible leading spaces.
885 */
886 while (*cmd == ' ' || *cmd == '\n')
887 cmd++;
888
889 /* First, update the admin status so that we avoid sending other
890 * possibly useless warnings and can also update the health if
891 * present after going back up.
892 */
893 if (as) {
894 if (strcasecmp(as, "drain") == 0)
895 srv_adm_set_drain(check->server);
896 else if (strcasecmp(as, "maint") == 0)
897 srv_adm_set_maint(check->server);
898 else
899 srv_adm_set_ready(check->server);
900 }
901
902 /* now change weights */
903 if (ps) {
904 const char *msg;
905
906 msg = server_parse_weight_change_request(check->server, ps);
907 if (!wrn || !*wrn)
908 wrn = msg;
909 }
910
911 if (cs) {
912 const char *msg;
913
914 cs += strlen("maxconn:");
915
916 msg = server_parse_maxconn_change_request(check->server, cs);
917 if (!wrn || !*wrn)
918 wrn = msg;
919 }
920
921 /* and finally health status */
922 if (hs) {
923 /* We'll report some of the warnings and errors we have
924 * here. Down reports are critical, we leave them untouched.
925 * Lack of report, or report of 'UP' leaves the room for
926 * ERR first, then WARN.
927 */
928 const char *msg = cmd;
929 struct buffer *t;
930
931 if (!*msg || status == HCHK_STATUS_L7OKD) {
932 if (err && *err)
933 msg = err;
934 else if (wrn && *wrn)
935 msg = wrn;
936 }
937
938 t = get_trash_chunk();
939 chunk_printf(t, "via agent : %s%s%s%s",
940 hs, *msg ? " (" : "",
941 msg, *msg ? ")" : "");
942 set_server_check_status(check, status, t->area);
943 }
944 else if (err && *err) {
945 /* No status change but we'd like to report something odd.
946 * Just report the current state and copy the message.
947 */
948 chunk_printf(&trash, "agent reports an error : %s", err);
949 set_server_check_status(check, status/*check->status*/, trash.area);
950 }
951 else if (wrn && *wrn) {
952 /* No status change but we'd like to report something odd.
953 * Just report the current state and copy the message.
954 */
955 chunk_printf(&trash, "agent warns : %s", wrn);
956 set_server_check_status(check, status/*check->status*/, trash.area);
957 }
958 else
959 set_server_check_status(check, status, NULL);
960
961 out:
962 return ret;
963
964 wait_more_data:
965 ret = TCPCHK_EVAL_WAIT;
966 goto out;
967}
968
969/* Evaluates a TCPCHK_ACT_CONNECT rule. Returns TCPCHK_EVAL_WAIT to wait the
970 * connection establishment, TCPCHK_EVAL_CONTINUE to evaluate the next rule or
971 * TCPCHK_EVAL_STOP if an error occurred.
972 */
973enum tcpcheck_eval_ret tcpcheck_eval_connect(struct check *check, struct tcpcheck_rule *rule)
974{
975 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
976 struct tcpcheck_connect *connect = &rule->connect;
977 struct proxy *proxy = check->proxy;
978 struct server *s = check->server;
979 struct task *t = check->task;
980 struct conn_stream *cs;
981 struct connection *conn = NULL;
982 struct protocol *proto;
983 struct xprt_ops *xprt;
984 struct tcpcheck_rule *next;
985 int status, port;
986
987 /* For a connect action we'll create a new connection. We may also have
988 * to kill a previous one. But we don't want to leave *without* a
989 * connection if we came here from the connection layer, hence with a
990 * connection. Thus we'll proceed in the following order :
991 * 1: close but not release previous connection (handled by the caller)
992 * 2: try to get a new connection
993 * 3: release and replace the old one on success
994 */
995
Christopher Fauletb51e0372020-11-25 13:47:00 +0100996 /* Always release input and output buffer when a new connect is evaluated */
997 check_release_buf(check, &check->bi);
998 check_release_buf(check, &check->bo);
999
Willy Tarreau51cd5952020-06-05 12:25:38 +02001000 /* 2- prepare new connection */
Christopher Faulet236c93b2020-07-02 09:19:54 +02001001 cs = cs_new(NULL, (s ? &s->obj_type : &proxy->obj_type));
Willy Tarreau51cd5952020-06-05 12:25:38 +02001002 if (!cs) {
1003 chunk_printf(&trash, "TCPCHK error allocating connection at step %d",
1004 tcpcheck_get_step_id(check, rule));
1005 if (rule->comment)
1006 chunk_appendf(&trash, " comment: '%s'", rule->comment);
1007 set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area);
1008 ret = TCPCHK_EVAL_STOP;
1009 goto out;
1010 }
1011
1012 /* 3- release and replace the old one on success */
1013 if (check->cs) {
1014 if (check->wait_list.events)
1015 check->cs->conn->mux->unsubscribe(check->cs, check->wait_list.events,
1016 &check->wait_list);
1017
1018 /* We may have been scheduled to run, and the I/O handler
1019 * expects to have a cs, so remove the tasklet
1020 */
1021 tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
1022 cs_destroy(check->cs);
1023 }
1024
1025 tasklet_set_tid(check->wait_list.tasklet, tid);
1026
1027 check->cs = cs;
1028 conn = cs->conn;
1029 conn_set_owner(conn, check->sess, NULL);
1030
1031 /* Maybe there were an older connection we were waiting on */
1032 check->wait_list.events = 0;
Willy Tarreau51cd5952020-06-05 12:25:38 +02001033
1034 /* no client address */
Willy Tarreau9b7587a2020-10-15 07:32:10 +02001035 if (!sockaddr_alloc(&conn->dst, NULL, 0)) {
Willy Tarreau51cd5952020-06-05 12:25:38 +02001036 status = SF_ERR_RESOURCE;
1037 goto fail_check;
1038 }
1039
1040 /* connect to the connect rule addr if specified, otherwise the check
1041 * addr if specified on the server. otherwise, use the server addr (it
1042 * MUST exist at this step).
1043 */
1044 *conn->dst = (is_addr(&connect->addr)
1045 ? connect->addr
1046 : (is_addr(&check->addr) ? check->addr : s->addr));
1047 proto = protocol_by_family(conn->dst->ss_family);
1048
1049 port = 0;
1050 if (!port && connect->port)
1051 port = connect->port;
1052 if (!port && connect->port_expr) {
1053 struct sample *smp;
1054
1055 smp = sample_fetch_as_type(check->proxy, check->sess, NULL,
1056 SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1057 connect->port_expr, SMP_T_SINT);
1058 if (smp)
1059 port = smp->data.u.sint;
1060 }
1061 if (!port && is_inet_addr(&connect->addr))
1062 port = get_host_port(&connect->addr);
1063 if (!port && check->port)
1064 port = check->port;
1065 if (!port && is_inet_addr(&check->addr))
1066 port = get_host_port(&check->addr);
1067 if (!port) {
1068 /* The server MUST exist here */
1069 port = s->svc_port;
1070 }
1071 set_host_port(conn->dst, port);
1072
1073 xprt = ((connect->options & TCPCHK_OPT_SSL)
1074 ? xprt_get(XPRT_SSL)
1075 : ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) ? check->xprt : xprt_get(XPRT_RAW)));
1076
1077 conn_prepare(conn, proto, xprt);
1078 cs_attach(cs, check, &check_conn_cb);
1079
Christopher Fauletf7177272020-10-02 13:41:55 +02001080 if ((connect->options & TCPCHK_OPT_SOCKS4) && s && (s->flags & SRV_F_SOCKS4_PROXY)) {
1081 conn->send_proxy_ofs = 1;
1082 conn->flags |= CO_FL_SOCKS4;
1083 }
1084 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.via_socks4 && (s->flags & SRV_F_SOCKS4_PROXY)) {
1085 conn->send_proxy_ofs = 1;
1086 conn->flags |= CO_FL_SOCKS4;
1087 }
1088
1089 if (connect->options & TCPCHK_OPT_SEND_PROXY) {
1090 conn->send_proxy_ofs = 1;
1091 conn->flags |= CO_FL_SEND_PROXY;
1092 }
1093 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.send_proxy && !(check->state & CHK_ST_AGENT)) {
1094 conn->send_proxy_ofs = 1;
1095 conn->flags |= CO_FL_SEND_PROXY;
1096 }
1097
Willy Tarreau51cd5952020-06-05 12:25:38 +02001098 status = SF_ERR_INTERNAL;
1099 next = get_next_tcpcheck_rule(check->tcpcheck_rules, rule);
1100 if (proto && proto->connect) {
1101 int flags = 0;
1102
1103 if (check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK)
1104 flags |= CONNECT_HAS_DATA;
1105 if (!next || next->action != TCPCHK_ACT_EXPECT)
1106 flags |= CONNECT_DELACK_ALWAYS;
1107 status = proto->connect(conn, flags);
1108 }
1109
1110 if (status != SF_ERR_NONE)
1111 goto fail_check;
1112
Christopher Faulet21ddc742020-07-01 15:26:14 +02001113 conn_set_private(conn);
Willy Tarreau51cd5952020-06-05 12:25:38 +02001114 conn->ctx = cs;
1115
Willy Tarreau51cd5952020-06-05 12:25:38 +02001116#ifdef USE_OPENSSL
1117 if (connect->sni)
1118 ssl_sock_set_servername(conn, connect->sni);
1119 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.sni)
1120 ssl_sock_set_servername(conn, s->check.sni);
1121
1122 if (connect->alpn)
1123 ssl_sock_set_alpn(conn, (unsigned char *)connect->alpn, connect->alpn_len);
1124 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.alpn_str)
1125 ssl_sock_set_alpn(conn, (unsigned char *)s->check.alpn_str, s->check.alpn_len);
1126#endif
Willy Tarreau51cd5952020-06-05 12:25:38 +02001127
1128 if (conn_ctrl_ready(conn) && (connect->options & TCPCHK_OPT_LINGER)) {
1129 /* Some servers don't like reset on close */
1130 fdtab[cs->conn->handle.fd].linger_risk = 0;
1131 }
1132
1133 if (conn_ctrl_ready(conn) && (conn->flags & (CO_FL_SEND_PROXY | CO_FL_SOCKS4))) {
1134 if (xprt_add_hs(conn) < 0)
1135 status = SF_ERR_RESOURCE;
1136 }
1137
Willy Tarreau8e979fa2020-07-31 08:49:31 +02001138 /* The mux may be initialized now if there isn't server attached to the
1139 * check (email alerts) or if there is a mux proto specified or if there
1140 * is no alpn.
1141 */
1142 if (!s || ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && check->mux_proto) ||
1143 connect->mux_proto || (!connect->alpn && !check->alpn_str)) {
1144 const struct mux_ops *mux_ops;
1145
1146 if (connect->mux_proto)
1147 mux_ops = connect->mux_proto->mux;
1148 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && check->mux_proto)
1149 mux_ops = check->mux_proto->mux;
1150 else {
1151 int mode = ((check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK
1152 ? PROTO_MODE_HTTP
1153 : PROTO_MODE_TCP);
1154
1155 mux_ops = conn_get_best_mux(conn, IST_NULL, PROTO_SIDE_BE, mode);
1156 }
1157 if (mux_ops && conn_install_mux(conn, mux_ops, cs, proxy, check->sess) < 0) {
1158 status = SF_ERR_INTERNAL;
1159 goto fail_check;
1160 }
1161 }
1162
Willy Tarreau51cd5952020-06-05 12:25:38 +02001163 fail_check:
1164 /* It can return one of :
1165 * - SF_ERR_NONE if everything's OK
1166 * - SF_ERR_SRVTO if there are no more servers
1167 * - SF_ERR_SRVCL if the connection was refused by the server
1168 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1169 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1170 * - SF_ERR_INTERNAL for any other purely internal errors
1171 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
1172 * Note that we try to prevent the network stack from sending the ACK during the
1173 * connect() when a pure TCP check is used (without PROXY protocol).
1174 */
1175 switch (status) {
1176 case SF_ERR_NONE:
1177 /* we allow up to min(inter, timeout.connect) for a connection
1178 * to establish but only when timeout.check is set as it may be
1179 * to short for a full check otherwise
1180 */
1181 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
1182
1183 if (proxy->timeout.check && proxy->timeout.connect) {
1184 int t_con = tick_add(now_ms, proxy->timeout.connect);
1185 t->expire = tick_first(t->expire, t_con);
1186 }
1187 break;
1188 case SF_ERR_SRVTO: /* ETIMEDOUT */
1189 case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */
1190 case SF_ERR_PRXCOND:
1191 case SF_ERR_RESOURCE:
1192 case SF_ERR_INTERNAL:
1193 chk_report_conn_err(check, errno, 0);
1194 ret = TCPCHK_EVAL_STOP;
1195 goto out;
1196 }
1197
1198 /* don't do anything until the connection is established */
1199 if (conn->flags & CO_FL_WAIT_XPRT) {
1200 if (conn->mux) {
1201 if (next && next->action == TCPCHK_ACT_SEND)
1202 conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
1203 else
1204 conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
1205 }
1206 ret = TCPCHK_EVAL_WAIT;
1207 goto out;
1208 }
1209
1210 out:
1211 if (conn && check->result == CHK_RES_FAILED)
1212 conn->flags |= CO_FL_ERROR;
1213 return ret;
1214}
1215
1216/* Evaluates a TCPCHK_ACT_SEND rule. Returns TCPCHK_EVAL_WAIT if outgoing data
1217 * were not fully sent, TCPCHK_EVAL_CONTINUE to evaluate the next rule or
1218 * TCPCHK_EVAL_STOP if an error occurred.
1219 */
1220enum tcpcheck_eval_ret tcpcheck_eval_send(struct check *check, struct tcpcheck_rule *rule)
1221{
1222 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1223 struct tcpcheck_send *send = &rule->send;
1224 struct conn_stream *cs = check->cs;
1225 struct connection *conn = cs_conn(cs);
1226 struct buffer *tmp = NULL;
1227 struct htx *htx = NULL;
1228
Christopher Fauletb51e0372020-11-25 13:47:00 +01001229 if (check->state & CHK_ST_OUT_ALLOC) {
1230 ret = TCPCHK_EVAL_WAIT;
1231 goto out;
1232 }
1233
1234 if (!check_get_buf(check, &check->bo)) {
1235 check->state |= CHK_ST_OUT_ALLOC;
1236 ret = TCPCHK_EVAL_WAIT;
1237 goto out;
1238 }
1239
Christopher Faulet6f45f032020-11-25 13:34:51 +01001240 /* Data already pending in the output buffer, send them now */
1241 if (b_data(&check->bo))
1242 goto do_send;
1243
Christopher Fauletb51e0372020-11-25 13:47:00 +01001244 /* Always release input buffer when a new send is evaluated */
1245 check_release_buf(check, &check->bi);
Willy Tarreau51cd5952020-06-05 12:25:38 +02001246
1247 switch (send->type) {
1248 case TCPCHK_SEND_STRING:
1249 case TCPCHK_SEND_BINARY:
1250 if (istlen(send->data) >= b_size(&check->bo)) {
1251 chunk_printf(&trash, "tcp-check send : string too large (%u) for buffer size (%u) at step %d",
1252 (unsigned int)istlen(send->data), (unsigned int)b_size(&check->bo),
1253 tcpcheck_get_step_id(check, rule));
1254 set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
1255 ret = TCPCHK_EVAL_STOP;
1256 goto out;
1257 }
1258 b_putist(&check->bo, send->data);
1259 break;
1260 case TCPCHK_SEND_STRING_LF:
1261 check->bo.data = sess_build_logline(check->sess, NULL, b_orig(&check->bo), b_size(&check->bo), &rule->send.fmt);
1262 if (!b_data(&check->bo))
1263 goto out;
1264 break;
1265 case TCPCHK_SEND_BINARY_LF: {
1266 int len = b_size(&check->bo);
1267
1268 tmp = alloc_trash_chunk();
1269 if (!tmp)
1270 goto error_lf;
1271 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &rule->send.fmt);
1272 if (!b_data(tmp))
1273 goto out;
1274 tmp->area[tmp->data] = '\0';
1275 if (parse_binary(b_orig(tmp), &check->bo.area, &len, NULL) == 0)
1276 goto error_lf;
1277 check->bo.data = len;
1278 break;
1279 }
1280 case TCPCHK_SEND_HTTP: {
1281 struct htx_sl *sl;
1282 struct ist meth, uri, vsn, clen, body;
1283 unsigned int slflags = 0;
1284
1285 tmp = alloc_trash_chunk();
1286 if (!tmp)
1287 goto error_htx;
1288
1289 meth = ((send->http.meth.meth == HTTP_METH_OTHER)
1290 ? ist2(send->http.meth.str.area, send->http.meth.str.data)
1291 : http_known_methods[send->http.meth.meth]);
1292 if (send->http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) {
1293 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &send->http.uri_fmt);
1294 uri = (b_data(tmp) ? ist2(b_orig(tmp), b_data(tmp)) : ist("/"));
1295 }
1296 else
1297 uri = (isttest(send->http.uri) ? send->http.uri : ist("/"));
1298 vsn = (isttest(send->http.vsn) ? send->http.vsn : ist("HTTP/1.0"));
1299
1300 if ((istlen(vsn) == 6 && *(vsn.ptr+5) == '2') ||
1301 (istlen(vsn) == 8 && (*(vsn.ptr+5) > '1' || (*(vsn.ptr+5) == '1' && *(vsn.ptr+7) >= '1'))))
1302 slflags |= HTX_SL_F_VER_11;
1303 slflags |= (HTX_SL_F_XFER_LEN|HTX_SL_F_CLEN);
1304 if (!isttest(send->http.body))
1305 slflags |= HTX_SL_F_BODYLESS;
1306
1307 htx = htx_from_buf(&check->bo);
1308 sl = htx_add_stline(htx, HTX_BLK_REQ_SL, slflags, meth, uri, vsn);
1309 if (!sl)
1310 goto error_htx;
1311 sl->info.req.meth = send->http.meth.meth;
1312 if (!http_update_host(htx, sl, uri))
1313 goto error_htx;
1314
1315 if (!LIST_ISEMPTY(&send->http.hdrs)) {
1316 struct tcpcheck_http_hdr *hdr;
1317 struct ist hdr_value;
1318
1319 list_for_each_entry(hdr, &send->http.hdrs, list) {
1320 chunk_reset(tmp);
1321 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &hdr->value);
1322 if (!b_data(tmp))
1323 continue;
1324 hdr_value = ist2(b_orig(tmp), b_data(tmp));
1325 if (!htx_add_header(htx, hdr->name, hdr_value))
1326 goto error_htx;
1327 if ((sl->flags & HTX_SL_F_HAS_AUTHORITY) && isteqi(hdr->name, ist("host"))) {
1328 if (!http_update_authority(htx, sl, hdr_value))
1329 goto error_htx;
1330 }
1331 }
1332
1333 }
1334 if (check->proxy->options2 & PR_O2_CHK_SNDST) {
1335 chunk_reset(tmp);
1336 httpchk_build_status_header(check->server, tmp);
1337 if (!htx_add_header(htx, ist("X-Haproxy-Server-State"), ist2(b_orig(tmp), b_data(tmp))))
1338 goto error_htx;
1339 }
1340
1341
1342 if (send->http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) {
1343 chunk_reset(tmp);
1344 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &send->http.body_fmt);
1345 body = ist2(b_orig(tmp), b_data(tmp));
1346 }
1347 else
1348 body = send->http.body;
1349 clen = ist((!istlen(body) ? "0" : ultoa(istlen(body))));
1350
1351 if (!htx_add_header(htx, ist("Connection"), ist("close")) ||
1352 !htx_add_header(htx, ist("Content-length"), clen))
1353 goto error_htx;
1354
1355
1356 if (!htx_add_endof(htx, HTX_BLK_EOH) ||
Christopher Faulet810df062020-07-22 16:20:34 +02001357 (istlen(body) && !htx_add_data_atonce(htx, body)))
1358 goto error_htx;
1359
1360 htx->flags |= HTX_FL_EOI; /* no more data are expected. Only EOM remains to add now */
1361 if (!htx_add_endof(htx, HTX_BLK_EOM))
Willy Tarreau51cd5952020-06-05 12:25:38 +02001362 goto error_htx;
1363
1364 htx_to_buf(htx, &check->bo);
1365 break;
1366 }
1367 case TCPCHK_SEND_UNDEF:
1368 /* Should never happen. */
1369 ret = TCPCHK_EVAL_STOP;
1370 goto out;
1371 };
1372
Christopher Faulet6f45f032020-11-25 13:34:51 +01001373 do_send:
Willy Tarreau51cd5952020-06-05 12:25:38 +02001374 if (conn->mux->snd_buf(cs, &check->bo,
1375 (IS_HTX_CONN(conn) ? (htxbuf(&check->bo))->data: b_data(&check->bo)), 0) <= 0) {
1376 if ((conn->flags & CO_FL_ERROR) || (cs->flags & CS_FL_ERROR)) {
1377 ret = TCPCHK_EVAL_STOP;
1378 goto out;
1379 }
1380 }
1381 if ((IS_HTX_CONN(conn) && !htx_is_empty(htxbuf(&check->bo))) || b_data(&check->bo)) {
1382 cs->conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
1383 ret = TCPCHK_EVAL_WAIT;
1384 goto out;
1385 }
1386
1387 out:
1388 free_trash_chunk(tmp);
Christopher Fauletb51e0372020-11-25 13:47:00 +01001389 if (!b_data(&check->bo) || ret == TCPCHK_EVAL_STOP)
1390 check_release_buf(check, &check->bo);
Willy Tarreau51cd5952020-06-05 12:25:38 +02001391 return ret;
1392
1393 error_htx:
1394 if (htx) {
1395 htx_reset(htx);
1396 htx_to_buf(htx, &check->bo);
1397 }
1398 chunk_printf(&trash, "tcp-check send : failed to build HTTP request at step %d",
1399 tcpcheck_get_step_id(check, rule));
1400 set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
1401 ret = TCPCHK_EVAL_STOP;
1402 goto out;
1403
1404 error_lf:
1405 chunk_printf(&trash, "tcp-check send : failed to build log-format string at step %d",
1406 tcpcheck_get_step_id(check, rule));
1407 set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
1408 ret = TCPCHK_EVAL_STOP;
1409 goto out;
1410
1411}
1412
1413/* Try to receive data before evaluating a tcp-check expect rule. Returns
1414 * TCPCHK_EVAL_WAIT if it is already subscribed on receive events or if nothing
1415 * was received, TCPCHK_EVAL_CONTINUE to evaluate the expect rule or
1416 * TCPCHK_EVAL_STOP if an error occurred.
1417 */
1418enum tcpcheck_eval_ret tcpcheck_eval_recv(struct check *check, struct tcpcheck_rule *rule)
1419{
1420 struct conn_stream *cs = check->cs;
1421 struct connection *conn = cs_conn(cs);
1422 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1423 size_t max, read, cur_read = 0;
1424 int is_empty;
1425 int read_poll = MAX_READ_POLL_LOOPS;
1426
1427 if (check->wait_list.events & SUB_RETRY_RECV)
1428 goto wait_more_data;
1429
1430 if (cs->flags & CS_FL_EOS)
1431 goto end_recv;
1432
Christopher Fauletb51e0372020-11-25 13:47:00 +01001433 if (check->state & CHK_ST_IN_ALLOC)
1434 goto wait_more_data;
1435
1436 if (!check_get_buf(check, &check->bi)) {
1437 check->state |= CHK_ST_IN_ALLOC;
1438 goto wait_more_data;
1439 }
1440
Willy Tarreau51cd5952020-06-05 12:25:38 +02001441 /* errors on the connection and the conn-stream were already checked */
1442
1443 /* prepare to detect if the mux needs more room */
1444 cs->flags &= ~CS_FL_WANT_ROOM;
1445
1446 while ((cs->flags & CS_FL_RCV_MORE) ||
1447 (!(conn->flags & CO_FL_ERROR) && !(cs->flags & (CS_FL_ERROR|CS_FL_EOS)))) {
1448 max = (IS_HTX_CS(cs) ? htx_free_space(htxbuf(&check->bi)) : b_room(&check->bi));
1449 read = conn->mux->rcv_buf(cs, &check->bi, max, 0);
1450 cur_read += read;
1451 if (!read ||
1452 (cs->flags & CS_FL_WANT_ROOM) ||
1453 (--read_poll <= 0) ||
1454 (read < max && read >= global.tune.recv_enough))
1455 break;
1456 }
1457
1458 end_recv:
1459 is_empty = (IS_HTX_CS(cs) ? htx_is_empty(htxbuf(&check->bi)) : !b_data(&check->bi));
1460 if (is_empty && ((conn->flags & CO_FL_ERROR) || (cs->flags & CS_FL_ERROR))) {
1461 /* Report network errors only if we got no other data. Otherwise
1462 * we'll let the upper layers decide whether the response is OK
1463 * or not. It is very common that an RST sent by the server is
1464 * reported as an error just after the last data chunk.
1465 */
1466 goto stop;
1467 }
1468 if (!cur_read) {
1469 if (!(cs->flags & (CS_FL_WANT_ROOM|CS_FL_ERROR|CS_FL_EOS))) {
1470 conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
1471 goto wait_more_data;
1472 }
1473 if (is_empty) {
1474 int status;
1475
1476 chunk_printf(&trash, "TCPCHK got an empty response at step %d",
1477 tcpcheck_get_step_id(check, rule));
1478 if (rule->comment)
1479 chunk_appendf(&trash, " comment: '%s'", rule->comment);
1480
1481 status = ((rule->expect.err_status != HCHK_STATUS_UNKNOWN) ? rule->expect.err_status : HCHK_STATUS_L7RSP);
1482 set_server_check_status(check, status, trash.area);
1483 goto stop;
1484 }
1485 }
1486
1487 out:
Christopher Fauletb51e0372020-11-25 13:47:00 +01001488 if (!b_data(&check->bi) || ret == TCPCHK_EVAL_STOP)
1489 check_release_buf(check, &check->bi);
Willy Tarreau51cd5952020-06-05 12:25:38 +02001490 return ret;
1491
1492 stop:
1493 ret = TCPCHK_EVAL_STOP;
1494 goto out;
1495
1496 wait_more_data:
1497 ret = TCPCHK_EVAL_WAIT;
1498 goto out;
1499}
1500
1501/* Evaluates an HTTP TCPCHK_ACT_EXPECT rule. If <last_read> is set , no more data
1502 * are expected. Returns TCPCHK_EVAL_WAIT to wait for more data,
1503 * TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP if an
1504 * error occurred.
1505 */
1506enum tcpcheck_eval_ret tcpcheck_eval_expect_http(struct check *check, struct tcpcheck_rule *rule, int last_read)
1507{
1508 struct htx *htx = htxbuf(&check->bi);
1509 struct htx_sl *sl;
1510 struct htx_blk *blk;
1511 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1512 struct tcpcheck_expect *expect = &rule->expect;
1513 struct buffer *msg = NULL, *tmp = NULL, *nbuf = NULL, *vbuf = NULL;
1514 enum healthcheck_status status = HCHK_STATUS_L7RSP;
1515 struct ist desc = IST_NULL;
1516 int i, match, inverse;
1517
1518 last_read |= (!htx_free_space(htx) || (htx_get_tail_type(htx) == HTX_BLK_EOM));
1519
1520 if (htx->flags & HTX_FL_PARSING_ERROR) {
1521 status = HCHK_STATUS_L7RSP;
1522 goto error;
1523 }
1524
1525 if (htx_is_empty(htx)) {
1526 if (last_read) {
1527 status = HCHK_STATUS_L7RSP;
1528 goto error;
1529 }
1530 goto wait_more_data;
1531 }
1532
1533 sl = http_get_stline(htx);
1534 check->code = sl->info.res.status;
1535
1536 if (check->server &&
1537 (check->server->proxy->options & PR_O_DISABLE404) &&
1538 (check->server->next_state != SRV_ST_STOPPED) &&
1539 (check->code == 404)) {
1540 /* 404 may be accepted as "stopping" only if the server was up */
1541 goto out;
1542 }
1543
1544 inverse = !!(expect->flags & TCPCHK_EXPT_FL_INV);
1545 /* Make GCC happy ; initialize match to a failure state. */
1546 match = inverse;
1547 status = expect->err_status;
1548
1549 switch (expect->type) {
1550 case TCPCHK_EXPECT_HTTP_STATUS:
1551 match = 0;
1552 for (i = 0; i < expect->codes.num; i++) {
1553 if (sl->info.res.status >= expect->codes.codes[i][0] &&
1554 sl->info.res.status <= expect->codes.codes[i][1]) {
1555 match = 1;
1556 break;
1557 }
1558 }
1559
1560 /* Set status and description in case of error */
1561 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7STS);
1562 if (LIST_ISEMPTY(&expect->onerror_fmt))
1563 desc = htx_sl_res_reason(sl);
1564 break;
1565 case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
1566 match = regex_exec2(expect->regex, HTX_SL_RES_CPTR(sl), HTX_SL_RES_CLEN(sl));
1567
1568 /* Set status and description in case of error */
1569 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7STS);
1570 if (LIST_ISEMPTY(&expect->onerror_fmt))
1571 desc = htx_sl_res_reason(sl);
1572 break;
1573
1574 case TCPCHK_EXPECT_HTTP_HEADER: {
1575 struct http_hdr_ctx ctx;
1576 struct ist npat, vpat, value;
1577 int full = (expect->flags & (TCPCHK_EXPT_FL_HTTP_HVAL_NONE|TCPCHK_EXPT_FL_HTTP_HVAL_FULL));
1578
1579 if (expect->flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT) {
1580 nbuf = alloc_trash_chunk();
1581 if (!nbuf) {
1582 status = HCHK_STATUS_L7RSP;
1583 desc = ist("Failed to allocate buffer to eval log-format string");
1584 goto error;
1585 }
1586 nbuf->data = sess_build_logline(check->sess, NULL, b_orig(nbuf), b_size(nbuf), &expect->hdr.name_fmt);
1587 if (!b_data(nbuf)) {
1588 status = HCHK_STATUS_L7RSP;
1589 desc = ist("log-format string evaluated to an empty string");
1590 goto error;
1591 }
1592 npat = ist2(b_orig(nbuf), b_data(nbuf));
1593 }
1594 else if (!(expect->flags & TCPCHK_EXPT_FL_HTTP_HNAME_REG))
1595 npat = expect->hdr.name;
1596
1597 if (expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT) {
1598 vbuf = alloc_trash_chunk();
1599 if (!vbuf) {
1600 status = HCHK_STATUS_L7RSP;
1601 desc = ist("Failed to allocate buffer to eval log-format string");
1602 goto error;
1603 }
1604 vbuf->data = sess_build_logline(check->sess, NULL, b_orig(vbuf), b_size(vbuf), &expect->hdr.value_fmt);
1605 if (!b_data(vbuf)) {
1606 status = HCHK_STATUS_L7RSP;
1607 desc = ist("log-format string evaluated to an empty string");
1608 goto error;
1609 }
1610 vpat = ist2(b_orig(vbuf), b_data(vbuf));
1611 }
1612 else if (!(expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_REG))
1613 vpat = expect->hdr.value;
1614
1615 match = 0;
1616 ctx.blk = NULL;
1617 while (1) {
1618 switch (expect->flags & TCPCHK_EXPT_FL_HTTP_HNAME_TYPE) {
1619 case TCPCHK_EXPT_FL_HTTP_HNAME_STR:
1620 if (!http_find_str_header(htx, npat, &ctx, full))
1621 goto end_of_match;
1622 break;
1623 case TCPCHK_EXPT_FL_HTTP_HNAME_BEG:
1624 if (!http_find_pfx_header(htx, npat, &ctx, full))
1625 goto end_of_match;
1626 break;
1627 case TCPCHK_EXPT_FL_HTTP_HNAME_END:
1628 if (!http_find_sfx_header(htx, npat, &ctx, full))
1629 goto end_of_match;
1630 break;
1631 case TCPCHK_EXPT_FL_HTTP_HNAME_SUB:
1632 if (!http_find_sub_header(htx, npat, &ctx, full))
1633 goto end_of_match;
1634 break;
1635 case TCPCHK_EXPT_FL_HTTP_HNAME_REG:
1636 if (!http_match_header(htx, expect->hdr.name_re, &ctx, full))
1637 goto end_of_match;
1638 break;
1639 default:
1640 /* should never happen */
1641 goto end_of_match;
1642 }
1643
1644 /* A header has matched the name pattern, let's test its
1645 * value now (always defined from there). If there is no
1646 * value pattern, it is a good match.
1647 */
1648
1649 if (expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_NONE) {
1650 match = 1;
1651 goto end_of_match;
1652 }
1653
1654 value = ctx.value;
1655 switch (expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_TYPE) {
1656 case TCPCHK_EXPT_FL_HTTP_HVAL_STR:
1657 if (isteq(value, vpat)) {
1658 match = 1;
1659 goto end_of_match;
1660 }
1661 break;
1662 case TCPCHK_EXPT_FL_HTTP_HVAL_BEG:
1663 if (istlen(value) < istlen(vpat))
1664 break;
1665 value = ist2(istptr(value), istlen(vpat));
1666 if (isteq(value, vpat)) {
1667 match = 1;
1668 goto end_of_match;
1669 }
1670 break;
1671 case TCPCHK_EXPT_FL_HTTP_HVAL_END:
1672 if (istlen(value) < istlen(vpat))
1673 break;
1674 value = ist2(istptr(value) + istlen(value) - istlen(vpat), istlen(vpat));
1675 if (isteq(value, vpat)) {
1676 match = 1;
1677 goto end_of_match;
1678 }
1679 break;
1680 case TCPCHK_EXPT_FL_HTTP_HVAL_SUB:
1681 if (isttest(istist(value, vpat))) {
1682 match = 1;
1683 goto end_of_match;
1684 }
1685 break;
1686 case TCPCHK_EXPT_FL_HTTP_HVAL_REG:
1687 if (regex_exec2(expect->hdr.value_re, istptr(value), istlen(value))) {
1688 match = 1;
1689 goto end_of_match;
1690 }
1691 break;
1692 }
1693 }
1694
1695 end_of_match:
1696 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7STS);
1697 if (LIST_ISEMPTY(&expect->onerror_fmt))
1698 desc = htx_sl_res_reason(sl);
1699 break;
1700 }
1701
1702 case TCPCHK_EXPECT_HTTP_BODY:
1703 case TCPCHK_EXPECT_HTTP_BODY_REGEX:
1704 case TCPCHK_EXPECT_HTTP_BODY_LF:
1705 match = 0;
1706 chunk_reset(&trash);
1707 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
1708 enum htx_blk_type type = htx_get_blk_type(blk);
1709
1710 if (type == HTX_BLK_EOM || type == HTX_BLK_TLR || type == HTX_BLK_EOT)
1711 break;
1712 if (type == HTX_BLK_DATA) {
1713 if (!chunk_istcat(&trash, htx_get_blk_value(htx, blk)))
1714 break;
1715 }
1716 }
1717
1718 if (!b_data(&trash)) {
1719 if (!last_read)
1720 goto wait_more_data;
1721 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7RSP);
1722 if (LIST_ISEMPTY(&expect->onerror_fmt))
1723 desc = ist("HTTP content check could not find a response body");
1724 goto error;
1725 }
1726
1727 if (expect->type == TCPCHK_EXPECT_HTTP_BODY_LF) {
1728 tmp = alloc_trash_chunk();
1729 if (!tmp) {
1730 status = HCHK_STATUS_L7RSP;
1731 desc = ist("Failed to allocate buffer to eval log-format string");
1732 goto error;
1733 }
1734 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &expect->fmt);
1735 if (!b_data(tmp)) {
1736 status = HCHK_STATUS_L7RSP;
1737 desc = ist("log-format string evaluated to an empty string");
1738 goto error;
1739 }
1740 }
1741
1742 if (!last_read &&
1743 ((expect->type == TCPCHK_EXPECT_HTTP_BODY && b_data(&trash) < istlen(expect->data)) ||
1744 ((expect->type == TCPCHK_EXPECT_HTTP_BODY_LF && b_data(&trash) < b_data(tmp))) ||
1745 (expect->min_recv > 0 && b_data(&trash) < expect->min_recv))) {
1746 ret = TCPCHK_EVAL_WAIT;
1747 goto out;
1748 }
1749
1750 if (expect->type ==TCPCHK_EXPECT_HTTP_BODY)
1751 match = my_memmem(b_orig(&trash), b_data(&trash), istptr(expect->data), istlen(expect->data)) != NULL;
1752 else if (expect->type ==TCPCHK_EXPECT_HTTP_BODY_LF)
1753 match = my_memmem(b_orig(&trash), b_data(&trash), b_orig(tmp), b_data(tmp)) != NULL;
1754 else
1755 match = regex_exec2(expect->regex, b_orig(&trash), b_data(&trash));
1756
1757 /* Set status and description in case of error */
1758 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7RSP);
1759 if (LIST_ISEMPTY(&expect->onerror_fmt))
1760 desc = (inverse
1761 ? ist("HTTP check matched unwanted content")
1762 : ist("HTTP content check did not match"));
1763 break;
1764
1765
1766 default:
1767 /* should never happen */
1768 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7RSP);
1769 goto error;
1770 }
1771
1772 /* Wait for more data on mismatch only if no minimum is defined (-1),
1773 * otherwise the absence of match is already conclusive.
1774 */
1775 if (!match && !last_read && (expect->min_recv == -1)) {
1776 ret = TCPCHK_EVAL_WAIT;
1777 goto out;
1778 }
1779
1780 if (!(match ^ inverse))
1781 goto error;
1782
1783 out:
1784 free_trash_chunk(tmp);
1785 free_trash_chunk(nbuf);
1786 free_trash_chunk(vbuf);
1787 free_trash_chunk(msg);
1788 return ret;
1789
1790 error:
1791 ret = TCPCHK_EVAL_STOP;
1792 msg = alloc_trash_chunk();
1793 if (msg)
1794 tcpcheck_expect_onerror_message(msg, check, rule, 0, desc);
1795 set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
1796 goto out;
1797
1798 wait_more_data:
1799 ret = TCPCHK_EVAL_WAIT;
1800 goto out;
1801}
1802
1803/* Evaluates a TCP TCPCHK_ACT_EXPECT rule. Returns TCPCHK_EVAL_WAIT to wait for
1804 * more data, TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP
1805 * if an error occurred.
1806 */
1807enum tcpcheck_eval_ret tcpcheck_eval_expect(struct check *check, struct tcpcheck_rule *rule, int last_read)
1808{
1809 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1810 struct tcpcheck_expect *expect = &rule->expect;
1811 struct buffer *msg = NULL, *tmp = NULL;
1812 struct ist desc = IST_NULL;
1813 enum healthcheck_status status;
1814 int match, inverse;
1815
1816 last_read |= b_full(&check->bi);
1817
1818 /* The current expect might need more data than the previous one, check again
1819 * that the minimum amount data required to match is respected.
1820 */
1821 if (!last_read) {
1822 if ((expect->type == TCPCHK_EXPECT_STRING || expect->type == TCPCHK_EXPECT_BINARY) &&
1823 (b_data(&check->bi) < istlen(expect->data))) {
1824 ret = TCPCHK_EVAL_WAIT;
1825 goto out;
1826 }
1827 if (expect->min_recv > 0 && (b_data(&check->bi) < expect->min_recv)) {
1828 ret = TCPCHK_EVAL_WAIT;
1829 goto out;
1830 }
1831 }
1832
1833 inverse = !!(expect->flags & TCPCHK_EXPT_FL_INV);
1834 /* Make GCC happy ; initialize match to a failure state. */
1835 match = inverse;
1836 status = ((expect->err_status != HCHK_STATUS_UNKNOWN) ? expect->err_status : HCHK_STATUS_L7RSP);
1837
1838 switch (expect->type) {
1839 case TCPCHK_EXPECT_STRING:
1840 case TCPCHK_EXPECT_BINARY:
1841 match = my_memmem(b_head(&check->bi), b_data(&check->bi), istptr(expect->data), istlen(expect->data)) != NULL;
1842 break;
1843 case TCPCHK_EXPECT_STRING_REGEX:
1844 match = regex_exec2(expect->regex, b_head(&check->bi), MIN(b_data(&check->bi), b_size(&check->bi)-1));
1845 break;
1846
1847 case TCPCHK_EXPECT_BINARY_REGEX:
1848 chunk_reset(&trash);
1849 dump_binary(&trash, b_head(&check->bi), b_data(&check->bi));
1850 match = regex_exec2(expect->regex, b_head(&trash), MIN(b_data(&trash), b_size(&trash)-1));
1851 break;
1852
1853 case TCPCHK_EXPECT_STRING_LF:
1854 case TCPCHK_EXPECT_BINARY_LF:
1855 match = 0;
1856 tmp = alloc_trash_chunk();
1857 if (!tmp) {
1858 status = HCHK_STATUS_L7RSP;
1859 desc = ist("Failed to allocate buffer to eval format string");
1860 goto error;
1861 }
1862 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &expect->fmt);
1863 if (!b_data(tmp)) {
1864 status = HCHK_STATUS_L7RSP;
1865 desc = ist("log-format string evaluated to an empty string");
1866 goto error;
1867 }
1868 if (expect->type == TCPCHK_EXPECT_BINARY_LF) {
1869 int len = tmp->data;
1870 if (parse_binary(b_orig(tmp), &tmp->area, &len, NULL) == 0) {
1871 status = HCHK_STATUS_L7RSP;
1872 desc = ist("Failed to parse hexastring resulting of eval of a log-format string");
1873 goto error;
1874 }
1875 tmp->data = len;
1876 }
1877 if (b_data(&check->bi) < tmp->data) {
1878 if (!last_read) {
1879 ret = TCPCHK_EVAL_WAIT;
1880 goto out;
1881 }
1882 break;
1883 }
1884 match = my_memmem(b_head(&check->bi), b_data(&check->bi), b_orig(tmp), b_data(tmp)) != NULL;
1885 break;
1886
1887 case TCPCHK_EXPECT_CUSTOM:
1888 if (expect->custom)
1889 ret = expect->custom(check, rule, last_read);
1890 goto out;
1891 default:
1892 /* Should never happen. */
1893 ret = TCPCHK_EVAL_STOP;
1894 goto out;
1895 }
1896
1897
1898 /* Wait for more data on mismatch only if no minimum is defined (-1),
1899 * otherwise the absence of match is already conclusive.
1900 */
1901 if (!match && !last_read && (expect->min_recv == -1)) {
1902 ret = TCPCHK_EVAL_WAIT;
1903 goto out;
1904 }
1905
1906 /* Result as expected, next rule. */
1907 if (match ^ inverse)
1908 goto out;
1909
1910 error:
1911 /* From this point on, we matched something we did not want, this is an error state. */
1912 ret = TCPCHK_EVAL_STOP;
1913 msg = alloc_trash_chunk();
1914 if (msg)
1915 tcpcheck_expect_onerror_message(msg, check, rule, match, desc);
1916 set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
1917 free_trash_chunk(msg);
1918
1919 out:
1920 free_trash_chunk(tmp);
1921 return ret;
1922}
1923
1924/* Evaluates a TCPCHK_ACT_ACTION_KW rule. Returns TCPCHK_EVAL_CONTINUE to
1925 * evaluate the next rule or TCPCHK_EVAL_STOP if an error occurred. It never
1926 * waits.
1927 */
1928enum tcpcheck_eval_ret tcpcheck_eval_action_kw(struct check *check, struct tcpcheck_rule *rule)
1929{
1930 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1931 struct act_rule *act_rule;
1932 enum act_return act_ret;
1933
1934 act_rule =rule->action_kw.rule;
1935 act_ret = act_rule->action_ptr(act_rule, check->proxy, check->sess, NULL, 0);
1936 if (act_ret != ACT_RET_CONT) {
1937 chunk_printf(&trash, "TCPCHK ACTION unexpected result at step %d\n",
1938 tcpcheck_get_step_id(check, rule));
1939 set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
1940 ret = TCPCHK_EVAL_STOP;
1941 }
1942
1943 return ret;
1944}
1945
1946/* Executes a tcp-check ruleset. Note that this is called both from the
1947 * connection's wake() callback and from the check scheduling task. It returns
1948 * 0 on normal cases, or <0 if a close() has happened on an existing connection,
1949 * presenting the risk of an fd replacement.
1950 *
1951 * Please do NOT place any return statement in this function and only leave
1952 * via the out_end_tcpcheck label after setting retcode.
1953 */
1954int tcpcheck_main(struct check *check)
1955{
1956 struct tcpcheck_rule *rule;
1957 struct conn_stream *cs = check->cs;
1958 struct connection *conn = cs_conn(cs);
1959 int must_read = 1, last_read = 0;
Christopher Faulet6f45f032020-11-25 13:34:51 +01001960 int retcode = 0;
Willy Tarreau51cd5952020-06-05 12:25:38 +02001961 enum tcpcheck_eval_ret eval_ret;
1962
1963 /* here, we know that the check is complete or that it failed */
1964 if (check->result != CHK_RES_UNKNOWN)
1965 goto out;
1966
1967 /* Note: the conn-stream and the connection may only be undefined before
1968 * the first rule evaluation (it is always a connect rule) or when the
1969 * conn-stream allocation failed on the first connect.
1970 */
1971
1972 /* 1- check for connection error, if any */
1973 if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR))
1974 goto out_end_tcpcheck;
1975
1976 /* 2- check if we are waiting for the connection establishment. It only
1977 * happens during TCPCHK_ACT_CONNECT. */
1978 if (check->current_step && check->current_step->action == TCPCHK_ACT_CONNECT) {
1979 if (conn->flags & CO_FL_WAIT_XPRT) {
1980 struct tcpcheck_rule *next;
1981
1982 next = get_next_tcpcheck_rule(check->tcpcheck_rules, check->current_step);
1983 if (next && next->action == TCPCHK_ACT_SEND) {
1984 if (!(check->wait_list.events & SUB_RETRY_SEND))
1985 conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
1986 goto out;
1987 }
1988 else {
1989 eval_ret = tcpcheck_eval_recv(check, check->current_step);
1990 if (eval_ret == TCPCHK_EVAL_STOP)
1991 goto out_end_tcpcheck;
1992 else if (eval_ret == TCPCHK_EVAL_WAIT)
1993 goto out;
1994 last_read = ((conn->flags & CO_FL_ERROR) || (cs->flags & (CS_FL_ERROR|CS_FL_EOS)));
1995 must_read = 0;
1996 }
1997 }
1998 rule = LIST_NEXT(&check->current_step->list, typeof(rule), list);
1999 }
2000
Christopher Faulet6f45f032020-11-25 13:34:51 +01002001 /* 3- check if a rule must be resume. It happens if check->current_step
Willy Tarreau51cd5952020-06-05 12:25:38 +02002002 * is defined. */
2003 else if (check->current_step)
2004 rule = check->current_step;
2005
Christopher Faulet6f45f032020-11-25 13:34:51 +01002006 /* 4- It is the first evaluation. We must create a session and preset
Willy Tarreau51cd5952020-06-05 12:25:38 +02002007 * tcp-check variables */
2008 else {
2009 struct tcpcheck_var *var;
2010
2011 /* First evaluation, create a session */
2012 check->sess = session_new(&checks_fe, NULL, &check->obj_type);
2013 if (!check->sess) {
2014 chunk_printf(&trash, "TCPCHK error allocating check session");
2015 set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area);
2016 goto out_end_tcpcheck;
2017 }
2018 vars_init(&check->vars, SCOPE_CHECK);
2019 rule = LIST_NEXT(check->tcpcheck_rules->list, typeof(rule), list);
2020
2021 /* Preset tcp-check variables */
2022 list_for_each_entry(var, &check->tcpcheck_rules->preset_vars, list) {
2023 struct sample smp;
2024
2025 memset(&smp, 0, sizeof(smp));
2026 smp_set_owner(&smp, check->proxy, check->sess, NULL, SMP_OPT_FINAL);
2027 smp.data = var->data;
2028 vars_set_by_name_ifexist(istptr(var->name), istlen(var->name), &smp);
2029 }
2030 }
2031
2032 /* Now evaluate the tcp-check rules */
2033
2034 list_for_each_entry_from(rule, check->tcpcheck_rules->list, list) {
2035 check->code = 0;
2036 switch (rule->action) {
2037 case TCPCHK_ACT_CONNECT:
2038 check->current_step = rule;
2039
2040 /* close but not release yet previous connection */
2041 if (check->cs) {
2042 cs_close(check->cs);
2043 retcode = -1; /* do not reuse the fd in the caller! */
2044 }
2045 eval_ret = tcpcheck_eval_connect(check, rule);
2046
2047 /* Refresh conn-stream and connection */
2048 cs = check->cs;
2049 conn = cs_conn(cs);
2050 must_read = 1; last_read = 0;
2051 break;
2052 case TCPCHK_ACT_SEND:
2053 check->current_step = rule;
2054 eval_ret = tcpcheck_eval_send(check, rule);
2055 must_read = 1;
2056 break;
2057 case TCPCHK_ACT_EXPECT:
2058 check->current_step = rule;
2059 if (must_read) {
2060 if (check->proxy->timeout.check)
2061 check->task->expire = tick_add_ifset(now_ms, check->proxy->timeout.check);
2062
2063 eval_ret = tcpcheck_eval_recv(check, rule);
2064 if (eval_ret == TCPCHK_EVAL_STOP)
2065 goto out_end_tcpcheck;
2066 else if (eval_ret == TCPCHK_EVAL_WAIT)
2067 goto out;
2068 last_read = ((conn->flags & CO_FL_ERROR) || (cs->flags & (CS_FL_ERROR|CS_FL_EOS)));
2069 must_read = 0;
2070 }
2071
2072 eval_ret = ((check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK
2073 ? tcpcheck_eval_expect_http(check, rule, last_read)
2074 : tcpcheck_eval_expect(check, rule, last_read));
2075
2076 if (eval_ret == TCPCHK_EVAL_WAIT) {
2077 check->current_step = rule->expect.head;
2078 if (!(check->wait_list.events & SUB_RETRY_RECV))
2079 conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
2080 }
2081 break;
2082 case TCPCHK_ACT_ACTION_KW:
2083 /* Don't update the current step */
2084 eval_ret = tcpcheck_eval_action_kw(check, rule);
2085 break;
2086 default:
2087 /* Otherwise, just go to the next one and don't update
2088 * the current step
2089 */
2090 eval_ret = TCPCHK_EVAL_CONTINUE;
2091 break;
2092 }
2093
2094 switch (eval_ret) {
2095 case TCPCHK_EVAL_CONTINUE:
2096 break;
2097 case TCPCHK_EVAL_WAIT:
2098 goto out;
2099 case TCPCHK_EVAL_STOP:
2100 goto out_end_tcpcheck;
2101 }
2102 }
2103
2104 /* All rules was evaluated */
2105 if (check->current_step) {
2106 rule = check->current_step;
2107
2108 if (rule->action == TCPCHK_ACT_EXPECT) {
2109 struct buffer *msg;
2110 enum healthcheck_status status;
2111
2112 if (check->server &&
2113 (check->server->proxy->options & PR_O_DISABLE404) &&
2114 (check->server->next_state != SRV_ST_STOPPED) &&
2115 (check->code == 404)) {
2116 set_server_check_status(check, HCHK_STATUS_L7OKCD, NULL);
2117 goto out_end_tcpcheck;
2118 }
2119
2120 msg = alloc_trash_chunk();
2121 if (msg)
2122 tcpcheck_expect_onsuccess_message(msg, check, rule, IST_NULL);
2123 status = ((rule->expect.ok_status != HCHK_STATUS_UNKNOWN) ? rule->expect.ok_status : HCHK_STATUS_L7OKD);
2124 set_server_check_status(check, status, (msg ? b_head(msg) : "(tcp-check)"));
2125 free_trash_chunk(msg);
2126 }
2127 else if (rule->action == TCPCHK_ACT_CONNECT) {
2128 const char *msg = ((rule->connect.options & TCPCHK_OPT_IMPLICIT) ? NULL : "(tcp-check)");
2129 enum healthcheck_status status = HCHK_STATUS_L4OK;
2130#ifdef USE_OPENSSL
2131 if (ssl_sock_is_ssl(conn))
2132 status = HCHK_STATUS_L6OK;
2133#endif
2134 set_server_check_status(check, status, msg);
2135 }
2136 }
2137 else
2138 set_server_check_status(check, HCHK_STATUS_L7OKD, "(tcp-check)");
2139
2140 out_end_tcpcheck:
2141 if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR))
2142 chk_report_conn_err(check, errno, 0);
2143
Christopher Fauletb51e0372020-11-25 13:47:00 +01002144 /* the tcpcheck is finished, release in/out buffer now */
2145 check_release_buf(check, &check->bi);
2146 check_release_buf(check, &check->bo);
2147
Willy Tarreau51cd5952020-06-05 12:25:38 +02002148 out:
2149 return retcode;
2150}
2151
2152
2153/**************************************************************************/
2154/******************* Internals to parse tcp-check rules *******************/
2155/**************************************************************************/
2156struct action_kw_list tcp_check_keywords = {
2157 .list = LIST_HEAD_INIT(tcp_check_keywords.list),
2158};
2159
2160/* Creates a tcp-check rule resulting from parsing a custom keyword. NULL is
2161 * returned on error.
2162 */
2163struct tcpcheck_rule *parse_tcpcheck_action(char **args, int cur_arg, struct proxy *px,
2164 struct list *rules, struct action_kw *kw,
2165 const char *file, int line, char **errmsg)
2166{
2167 struct tcpcheck_rule *chk = NULL;
2168 struct act_rule *actrule = NULL;
2169
2170 actrule = calloc(1, sizeof(*actrule));
2171 if (!actrule) {
2172 memprintf(errmsg, "out of memory");
2173 goto error;
2174 }
2175 actrule->kw = kw;
2176 actrule->from = ACT_F_TCP_CHK;
2177
2178 cur_arg++;
2179 if (kw->parse((const char **)args, &cur_arg, px, actrule, errmsg) == ACT_RET_PRS_ERR) {
2180 memprintf(errmsg, "'%s' : %s", kw->kw, *errmsg);
2181 goto error;
2182 }
2183
2184 chk = calloc(1, sizeof(*chk));
2185 if (!chk) {
2186 memprintf(errmsg, "out of memory");
2187 goto error;
2188 }
2189 chk->action = TCPCHK_ACT_ACTION_KW;
2190 chk->action_kw.rule = actrule;
2191 return chk;
2192
2193 error:
2194 free(actrule);
2195 return NULL;
2196}
2197
2198/* Parses and creates a tcp-check connect or an http-check connect rule. NULL is
2199 * returned on error.
2200 */
2201struct tcpcheck_rule *parse_tcpcheck_connect(char **args, int cur_arg, struct proxy *px, struct list *rules,
2202 const char *file, int line, char **errmsg)
2203{
2204 struct tcpcheck_rule *chk = NULL;
2205 struct sockaddr_storage *sk = NULL;
2206 char *comment = NULL, *sni = NULL, *alpn = NULL;
2207 struct sample_expr *port_expr = NULL;
2208 const struct mux_proto_list *mux_proto = NULL;
2209 unsigned short conn_opts = 0;
2210 long port = 0;
2211 int alpn_len = 0;
2212
2213 list_for_each_entry(chk, rules, list) {
2214 if (chk->action == TCPCHK_ACT_CONNECT)
2215 break;
2216 if (chk->action == TCPCHK_ACT_COMMENT ||
2217 chk->action == TCPCHK_ACT_ACTION_KW ||
2218 (chk->action == TCPCHK_ACT_SEND && (chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)))
2219 continue;
2220
2221 memprintf(errmsg, "first step MUST also be a 'connect', "
2222 "optionally preceded by a 'set-var', an 'unset-var' or a 'comment', "
2223 "when there is a 'connect' step in the tcp-check ruleset");
2224 goto error;
2225 }
2226
2227 cur_arg++;
2228 while (*(args[cur_arg])) {
2229 if (strcmp(args[cur_arg], "default") == 0)
2230 conn_opts |= TCPCHK_OPT_DEFAULT_CONNECT;
2231 else if (strcmp(args[cur_arg], "addr") == 0) {
2232 int port1, port2;
Willy Tarreau51cd5952020-06-05 12:25:38 +02002233
2234 if (!*(args[cur_arg+1])) {
2235 memprintf(errmsg, "'%s' expects <ipv4|ipv6> as argument.", args[cur_arg]);
2236 goto error;
2237 }
2238
Willy Tarreau65ec4e32020-09-16 19:17:08 +02002239 sk = str2sa_range(args[cur_arg+1], NULL, &port1, &port2, NULL, NULL,
2240 errmsg, NULL, NULL, PA_O_RESOLVE | PA_O_PORT_OK | PA_O_STREAM | PA_O_CONNECT);
Willy Tarreau51cd5952020-06-05 12:25:38 +02002241 if (!sk) {
2242 memprintf(errmsg, "'%s' : %s.", args[cur_arg], *errmsg);
2243 goto error;
2244 }
2245
Willy Tarreau51cd5952020-06-05 12:25:38 +02002246 cur_arg++;
2247 }
2248 else if (strcmp(args[cur_arg], "port") == 0) {
2249 const char *p, *end;
2250
2251 if (!*(args[cur_arg+1])) {
2252 memprintf(errmsg, "'%s' expects a port number or a sample expression as argument.", args[cur_arg]);
2253 goto error;
2254 }
2255 cur_arg++;
2256
2257 port = 0;
2258 release_sample_expr(port_expr);
2259 p = args[cur_arg]; end = p + strlen(p);
2260 port = read_uint(&p, end);
2261 if (p != end) {
2262 int idx = 0;
2263
2264 px->conf.args.ctx = ARGC_SRV;
2265 port_expr = sample_parse_expr((char *[]){args[cur_arg], NULL}, &idx,
2266 file, line, errmsg, &px->conf.args, NULL);
2267
2268 if (!port_expr) {
2269 memprintf(errmsg, "error detected while parsing port expression : %s", *errmsg);
2270 goto error;
2271 }
2272 if (!(port_expr->fetch->val & SMP_VAL_BE_CHK_RUL)) {
2273 memprintf(errmsg, "error detected while parsing port expression : "
2274 " fetch method '%s' extracts information from '%s', "
2275 "none of which is available here.\n",
2276 args[cur_arg], sample_src_names(port_expr->fetch->use));
2277 goto error;
2278 }
2279 px->http_needed |= !!(port_expr->fetch->use & SMP_USE_HTTP_ANY);
2280 }
2281 else if (port > 65535 || port < 1) {
2282 memprintf(errmsg, "expects a valid TCP port (from range 1 to 65535) or a sample expression, got %s.",
2283 args[cur_arg]);
2284 goto error;
2285 }
2286 }
2287 else if (strcmp(args[cur_arg], "proto") == 0) {
2288 if (!*(args[cur_arg+1])) {
2289 memprintf(errmsg, "'%s' expects a MUX protocol as argument.", args[cur_arg]);
2290 goto error;
2291 }
2292 mux_proto = get_mux_proto(ist2(args[cur_arg+1], strlen(args[cur_arg+1])));
2293 if (!mux_proto) {
2294 memprintf(errmsg, "'%s' : unknown MUX protocol '%s'.", args[cur_arg], args[cur_arg+1]);
2295 goto error;
2296 }
Amaury Denoyelle34ff9ac2020-11-13 12:34:58 +01002297
2298 if (strcmp(args[0], "tcp-check") == 0 && mux_proto->mode != PROTO_MODE_TCP) {
2299 memprintf(errmsg, "'%s' : invalid MUX protocol '%s' for tcp-check", args[cur_arg], args[cur_arg+1]);
2300 goto error;
2301 }
2302 else if (strcmp(args[0], "http-check") == 0 && mux_proto->mode != PROTO_MODE_HTTP) {
2303 memprintf(errmsg, "'%s' : invalid MUX protocol '%s' for http-check", args[cur_arg], args[cur_arg+1]);
2304 goto error;
2305 }
2306
Willy Tarreau51cd5952020-06-05 12:25:38 +02002307 cur_arg++;
2308 }
2309 else if (strcmp(args[cur_arg], "comment") == 0) {
2310 if (!*(args[cur_arg+1])) {
2311 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2312 goto error;
2313 }
2314 cur_arg++;
2315 free(comment);
2316 comment = strdup(args[cur_arg]);
2317 if (!comment) {
2318 memprintf(errmsg, "out of memory");
2319 goto error;
2320 }
2321 }
2322 else if (strcmp(args[cur_arg], "send-proxy") == 0)
2323 conn_opts |= TCPCHK_OPT_SEND_PROXY;
2324 else if (strcmp(args[cur_arg], "via-socks4") == 0)
2325 conn_opts |= TCPCHK_OPT_SOCKS4;
2326 else if (strcmp(args[cur_arg], "linger") == 0)
2327 conn_opts |= TCPCHK_OPT_LINGER;
2328#ifdef USE_OPENSSL
2329 else if (strcmp(args[cur_arg], "ssl") == 0) {
2330 px->options |= PR_O_TCPCHK_SSL;
2331 conn_opts |= TCPCHK_OPT_SSL;
2332 }
2333 else if (strcmp(args[cur_arg], "sni") == 0) {
2334 if (!*(args[cur_arg+1])) {
2335 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2336 goto error;
2337 }
2338 cur_arg++;
2339 free(sni);
2340 sni = strdup(args[cur_arg]);
2341 if (!sni) {
2342 memprintf(errmsg, "out of memory");
2343 goto error;
2344 }
2345 }
2346 else if (strcmp(args[cur_arg], "alpn") == 0) {
2347#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
2348 free(alpn);
2349 if (ssl_sock_parse_alpn(args[cur_arg + 1], &alpn, &alpn_len, errmsg)) {
2350 memprintf(errmsg, "'%s' : %s", args[cur_arg], *errmsg);
2351 goto error;
2352 }
2353 cur_arg++;
2354#else
2355 memprintf(errmsg, "'%s' : library does not support TLS ALPN extension.", args[cur_arg]);
2356 goto error;
2357#endif
2358 }
2359#endif /* USE_OPENSSL */
2360
2361 else {
2362 memprintf(errmsg, "expects 'comment', 'port', 'addr', 'send-proxy'"
2363#ifdef USE_OPENSSL
2364 ", 'ssl', 'sni', 'alpn'"
2365#endif /* USE_OPENSSL */
2366 " or 'via-socks4', 'linger', 'default' but got '%s' as argument.",
2367 args[cur_arg]);
2368 goto error;
2369 }
2370 cur_arg++;
2371 }
2372
2373 chk = calloc(1, sizeof(*chk));
2374 if (!chk) {
2375 memprintf(errmsg, "out of memory");
2376 goto error;
2377 }
2378 chk->action = TCPCHK_ACT_CONNECT;
2379 chk->comment = comment;
2380 chk->connect.port = port;
2381 chk->connect.options = conn_opts;
2382 chk->connect.sni = sni;
2383 chk->connect.alpn = alpn;
2384 chk->connect.alpn_len= alpn_len;
2385 chk->connect.port_expr= port_expr;
2386 chk->connect.mux_proto= mux_proto;
2387 if (sk)
2388 chk->connect.addr = *sk;
2389 return chk;
2390
2391 error:
2392 free(alpn);
2393 free(sni);
2394 free(comment);
2395 release_sample_expr(port_expr);
2396 return NULL;
2397}
2398
2399/* Parses and creates a tcp-check send rule. NULL is returned on error */
2400struct tcpcheck_rule *parse_tcpcheck_send(char **args, int cur_arg, struct proxy *px, struct list *rules,
2401 const char *file, int line, char **errmsg)
2402{
2403 struct tcpcheck_rule *chk = NULL;
2404 char *comment = NULL, *data = NULL;
2405 enum tcpcheck_send_type type = TCPCHK_SEND_UNDEF;
2406
2407 if (strcmp(args[cur_arg], "send-binary-lf") == 0)
2408 type = TCPCHK_SEND_BINARY_LF;
2409 else if (strcmp(args[cur_arg], "send-binary") == 0)
2410 type = TCPCHK_SEND_BINARY;
2411 else if (strcmp(args[cur_arg], "send-lf") == 0)
2412 type = TCPCHK_SEND_STRING_LF;
2413 else if (strcmp(args[cur_arg], "send") == 0)
2414 type = TCPCHK_SEND_STRING;
2415
2416 if (!*(args[cur_arg+1])) {
2417 memprintf(errmsg, "'%s' expects a %s as argument",
2418 (type == TCPCHK_SEND_BINARY ? "binary string": "string"), args[cur_arg]);
2419 goto error;
2420 }
2421
2422 data = args[cur_arg+1];
2423
2424 cur_arg += 2;
2425 while (*(args[cur_arg])) {
2426 if (strcmp(args[cur_arg], "comment") == 0) {
2427 if (!*(args[cur_arg+1])) {
2428 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2429 goto error;
2430 }
2431 cur_arg++;
2432 free(comment);
2433 comment = strdup(args[cur_arg]);
2434 if (!comment) {
2435 memprintf(errmsg, "out of memory");
2436 goto error;
2437 }
2438 }
2439 else {
2440 memprintf(errmsg, "expects 'comment' but got '%s' as argument.",
2441 args[cur_arg]);
2442 goto error;
2443 }
2444 cur_arg++;
2445 }
2446
2447 chk = calloc(1, sizeof(*chk));
2448 if (!chk) {
2449 memprintf(errmsg, "out of memory");
2450 goto error;
2451 }
2452 chk->action = TCPCHK_ACT_SEND;
2453 chk->comment = comment;
2454 chk->send.type = type;
2455
2456 switch (chk->send.type) {
2457 case TCPCHK_SEND_STRING:
2458 chk->send.data = ist2(strdup(data), strlen(data));
2459 if (!isttest(chk->send.data)) {
2460 memprintf(errmsg, "out of memory");
2461 goto error;
2462 }
2463 break;
2464 case TCPCHK_SEND_BINARY: {
2465 int len = chk->send.data.len;
2466 if (parse_binary(data, &chk->send.data.ptr, &len, errmsg) == 0) {
2467 memprintf(errmsg, "'%s' invalid binary string (%s).\n", data, *errmsg);
2468 goto error;
2469 }
2470 chk->send.data.len = len;
2471 break;
2472 }
2473 case TCPCHK_SEND_STRING_LF:
2474 case TCPCHK_SEND_BINARY_LF:
2475 LIST_INIT(&chk->send.fmt);
2476 px->conf.args.ctx = ARGC_SRV;
2477 if (!parse_logformat_string(data, px, &chk->send.fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
2478 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", data, *errmsg);
2479 goto error;
2480 }
2481 break;
2482 case TCPCHK_SEND_HTTP:
2483 case TCPCHK_SEND_UNDEF:
2484 goto error;
2485 }
2486
2487 return chk;
2488
2489 error:
2490 free(chk);
2491 free(comment);
2492 return NULL;
2493}
2494
2495/* Parses and creates a http-check send rule. NULL is returned on error */
2496struct tcpcheck_rule *parse_tcpcheck_send_http(char **args, int cur_arg, struct proxy *px, struct list *rules,
2497 const char *file, int line, char **errmsg)
2498{
2499 struct tcpcheck_rule *chk = NULL;
2500 struct tcpcheck_http_hdr *hdr = NULL;
2501 struct http_hdr hdrs[global.tune.max_http_hdr];
2502 char *meth = NULL, *uri = NULL, *vsn = NULL;
2503 char *body = NULL, *comment = NULL;
2504 unsigned int flags = 0;
2505 int i = 0, host_hdr = -1;
2506
2507 cur_arg++;
2508 while (*(args[cur_arg])) {
2509 if (strcmp(args[cur_arg], "meth") == 0) {
2510 if (!*(args[cur_arg+1])) {
2511 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2512 goto error;
2513 }
2514 cur_arg++;
2515 meth = args[cur_arg];
2516 }
2517 else if (strcmp(args[cur_arg], "uri") == 0 || strcmp(args[cur_arg], "uri-lf") == 0) {
2518 if (!*(args[cur_arg+1])) {
2519 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2520 goto error;
2521 }
2522 flags &= ~TCPCHK_SND_HTTP_FL_URI_FMT;
2523 if (strcmp(args[cur_arg], "uri-lf") == 0)
2524 flags |= TCPCHK_SND_HTTP_FL_URI_FMT;
2525 cur_arg++;
2526 uri = args[cur_arg];
2527 }
2528 else if (strcmp(args[cur_arg], "ver") == 0) {
2529 if (!*(args[cur_arg+1])) {
2530 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2531 goto error;
2532 }
2533 cur_arg++;
2534 vsn = args[cur_arg];
2535 }
2536 else if (strcmp(args[cur_arg], "hdr") == 0) {
2537 if (!*args[cur_arg+1] || !*args[cur_arg+2]) {
2538 memprintf(errmsg, "'%s' expects <name> and <value> as arguments", args[cur_arg]);
2539 goto error;
2540 }
2541
2542 if (strcasecmp(args[cur_arg+1], "host") == 0) {
2543 if (host_hdr >= 0) {
2544 memprintf(errmsg, "'%s' header already defined (previous value is '%s')",
2545 args[cur_arg+1], istptr(hdrs[host_hdr].v));
2546 goto error;
2547 }
2548 host_hdr = i;
2549 }
2550 else if (strcasecmp(args[cur_arg+1], "connection") == 0 ||
2551 strcasecmp(args[cur_arg+1], "content-length") == 0 ||
2552 strcasecmp(args[cur_arg+1], "transfer-encoding") == 0)
2553 goto skip_hdr;
2554
2555 hdrs[i].n = ist2(args[cur_arg+1], strlen(args[cur_arg+1]));
2556 hdrs[i].v = ist2(args[cur_arg+2], strlen(args[cur_arg+2]));
2557 i++;
2558 skip_hdr:
2559 cur_arg += 2;
2560 }
2561 else if (strcmp(args[cur_arg], "body") == 0 || strcmp(args[cur_arg], "body-lf") == 0) {
2562 if (!*(args[cur_arg+1])) {
2563 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2564 goto error;
2565 }
2566 flags &= ~TCPCHK_SND_HTTP_FL_BODY_FMT;
2567 if (strcmp(args[cur_arg], "body-lf") == 0)
2568 flags |= TCPCHK_SND_HTTP_FL_BODY_FMT;
2569 cur_arg++;
2570 body = args[cur_arg];
2571 }
2572 else if (strcmp(args[cur_arg], "comment") == 0) {
2573 if (!*(args[cur_arg+1])) {
2574 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2575 goto error;
2576 }
2577 cur_arg++;
2578 free(comment);
2579 comment = strdup(args[cur_arg]);
2580 if (!comment) {
2581 memprintf(errmsg, "out of memory");
2582 goto error;
2583 }
2584 }
2585 else {
2586 memprintf(errmsg, "expects 'comment', 'meth', 'uri', 'uri-lf', 'ver', 'hdr', 'body' or 'body-lf'"
2587 " but got '%s' as argument.", args[cur_arg]);
2588 goto error;
2589 }
2590 cur_arg++;
2591 }
2592
2593 hdrs[i].n = hdrs[i].v = IST_NULL;
2594
2595 chk = calloc(1, sizeof(*chk));
2596 if (!chk) {
2597 memprintf(errmsg, "out of memory");
2598 goto error;
2599 }
2600 chk->action = TCPCHK_ACT_SEND;
2601 chk->comment = comment; comment = NULL;
2602 chk->send.type = TCPCHK_SEND_HTTP;
2603 chk->send.http.flags = flags;
2604 LIST_INIT(&chk->send.http.hdrs);
2605
2606 if (meth) {
2607 chk->send.http.meth.meth = find_http_meth(meth, strlen(meth));
2608 chk->send.http.meth.str.area = strdup(meth);
2609 chk->send.http.meth.str.data = strlen(meth);
2610 if (!chk->send.http.meth.str.area) {
2611 memprintf(errmsg, "out of memory");
2612 goto error;
2613 }
2614 }
2615 if (uri) {
2616 if (chk->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) {
2617 LIST_INIT(&chk->send.http.uri_fmt);
2618 px->conf.args.ctx = ARGC_SRV;
2619 if (!parse_logformat_string(uri, px, &chk->send.http.uri_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
2620 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", uri, *errmsg);
2621 goto error;
2622 }
2623 }
2624 else {
2625 chk->send.http.uri = ist2(strdup(uri), strlen(uri));
2626 if (!isttest(chk->send.http.uri)) {
2627 memprintf(errmsg, "out of memory");
2628 goto error;
2629 }
2630 }
2631 }
2632 if (vsn) {
2633 chk->send.http.vsn = ist2(strdup(vsn), strlen(vsn));
2634 if (!isttest(chk->send.http.vsn)) {
2635 memprintf(errmsg, "out of memory");
2636 goto error;
2637 }
2638 }
2639 for (i = 0; istlen(hdrs[i].n); i++) {
2640 hdr = calloc(1, sizeof(*hdr));
2641 if (!hdr) {
2642 memprintf(errmsg, "out of memory");
2643 goto error;
2644 }
2645 LIST_INIT(&hdr->value);
2646 hdr->name = istdup(hdrs[i].n);
2647 if (!isttest(hdr->name)) {
2648 memprintf(errmsg, "out of memory");
2649 goto error;
2650 }
2651
2652 ist0(hdrs[i].v);
2653 if (!parse_logformat_string(istptr(hdrs[i].v), px, &hdr->value, 0, SMP_VAL_BE_CHK_RUL, errmsg))
2654 goto error;
2655 LIST_ADDQ(&chk->send.http.hdrs, &hdr->list);
2656 hdr = NULL;
2657 }
2658
2659 if (body) {
2660 if (chk->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) {
2661 LIST_INIT(&chk->send.http.body_fmt);
2662 px->conf.args.ctx = ARGC_SRV;
2663 if (!parse_logformat_string(body, px, &chk->send.http.body_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
2664 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", body, *errmsg);
2665 goto error;
2666 }
2667 }
2668 else {
2669 chk->send.http.body = ist2(strdup(body), strlen(body));
2670 if (!isttest(chk->send.http.body)) {
2671 memprintf(errmsg, "out of memory");
2672 goto error;
2673 }
2674 }
2675 }
2676
2677 return chk;
2678
2679 error:
2680 free_tcpcheck_http_hdr(hdr);
2681 free_tcpcheck(chk, 0);
2682 free(comment);
2683 return NULL;
2684}
2685
2686/* Parses and creates a http-check comment rule. NULL is returned on error */
2687struct tcpcheck_rule *parse_tcpcheck_comment(char **args, int cur_arg, struct proxy *px, struct list *rules,
2688 const char *file, int line, char **errmsg)
2689{
2690 struct tcpcheck_rule *chk = NULL;
2691 char *comment = NULL;
2692
2693 if (!*(args[cur_arg+1])) {
2694 memprintf(errmsg, "expects a string as argument");
2695 goto error;
2696 }
2697 cur_arg++;
2698 comment = strdup(args[cur_arg]);
2699 if (!comment) {
2700 memprintf(errmsg, "out of memory");
2701 goto error;
2702 }
2703
2704 chk = calloc(1, sizeof(*chk));
2705 if (!chk) {
2706 memprintf(errmsg, "out of memory");
2707 goto error;
2708 }
2709 chk->action = TCPCHK_ACT_COMMENT;
2710 chk->comment = comment;
2711 return chk;
2712
2713 error:
2714 free(comment);
2715 return NULL;
2716}
2717
2718/* Parses and creates a tcp-check or an http-check expect rule. NULL is returned
2719 * on error. <proto> is set to the right protocol flags (covered by the
2720 * TCPCHK_RULES_PROTO_CHK mask).
2721 */
2722struct tcpcheck_rule *parse_tcpcheck_expect(char **args, int cur_arg, struct proxy *px,
2723 struct list *rules, unsigned int proto,
2724 const char *file, int line, char **errmsg)
2725{
2726 struct tcpcheck_rule *prev_check, *chk = NULL;
2727 struct sample_expr *status_expr = NULL;
2728 char *on_success_msg, *on_error_msg, *comment, *pattern, *npat, *vpat;
2729 enum tcpcheck_expect_type type = TCPCHK_EXPECT_UNDEF;
2730 enum healthcheck_status ok_st = HCHK_STATUS_UNKNOWN;
2731 enum healthcheck_status err_st = HCHK_STATUS_UNKNOWN;
2732 enum healthcheck_status tout_st = HCHK_STATUS_UNKNOWN;
2733 unsigned int flags = 0;
2734 long min_recv = -1;
2735 int inverse = 0;
2736
2737 on_success_msg = on_error_msg = comment = pattern = npat = vpat = NULL;
2738 if (!*(args[cur_arg+1])) {
2739 memprintf(errmsg, "expects at least a matching pattern as arguments");
2740 goto error;
2741 }
2742
2743 cur_arg++;
2744 while (*(args[cur_arg])) {
2745 int in_pattern = 0;
2746
2747 rescan:
2748 if (strcmp(args[cur_arg], "min-recv") == 0) {
2749 if (in_pattern) {
2750 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2751 goto error;
2752 }
2753 if (!*(args[cur_arg+1])) {
2754 memprintf(errmsg, "'%s' expects a integer as argument", args[cur_arg]);
2755 goto error;
2756 }
2757 /* Use an signed integer here because of chksize */
2758 cur_arg++;
2759 min_recv = atol(args[cur_arg]);
2760 if (min_recv < -1 || min_recv > INT_MAX) {
2761 memprintf(errmsg, "'%s' expects -1 or an integer from 0 to INT_MAX" , args[cur_arg-1]);
2762 goto error;
2763 }
2764 }
2765 else if (*(args[cur_arg]) == '!') {
2766 in_pattern = 1;
2767 while (*(args[cur_arg]) == '!') {
2768 inverse = !inverse;
2769 args[cur_arg]++;
2770 }
2771 if (!*(args[cur_arg]))
2772 cur_arg++;
2773 goto rescan;
2774 }
2775 else if (strcmp(args[cur_arg], "string") == 0 || strcmp(args[cur_arg], "rstring") == 0) {
2776 if (type != TCPCHK_EXPECT_UNDEF) {
2777 memprintf(errmsg, "only on pattern expected");
2778 goto error;
2779 }
2780 if (proto != TCPCHK_RULES_HTTP_CHK)
2781 type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_STRING : TCPCHK_EXPECT_STRING_REGEX);
2782 else
2783 type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_HTTP_BODY : TCPCHK_EXPECT_HTTP_BODY_REGEX);
2784
2785 if (!*(args[cur_arg+1])) {
2786 memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
2787 goto error;
2788 }
2789 cur_arg++;
2790 pattern = args[cur_arg];
2791 }
2792 else if (strcmp(args[cur_arg], "binary") == 0 || strcmp(args[cur_arg], "rbinary") == 0) {
2793 if (proto == TCPCHK_RULES_HTTP_CHK)
2794 goto bad_http_kw;
2795 if (type != TCPCHK_EXPECT_UNDEF) {
2796 memprintf(errmsg, "only on pattern expected");
2797 goto error;
2798 }
2799 type = ((*(args[cur_arg]) == 'b') ? TCPCHK_EXPECT_BINARY : TCPCHK_EXPECT_BINARY_REGEX);
2800
2801 if (!*(args[cur_arg+1])) {
2802 memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
2803 goto error;
2804 }
2805 cur_arg++;
2806 pattern = args[cur_arg];
2807 }
2808 else if (strcmp(args[cur_arg], "string-lf") == 0 || strcmp(args[cur_arg], "binary-lf") == 0) {
2809 if (type != TCPCHK_EXPECT_UNDEF) {
2810 memprintf(errmsg, "only on pattern expected");
2811 goto error;
2812 }
2813 if (proto != TCPCHK_RULES_HTTP_CHK)
2814 type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_STRING_LF : TCPCHK_EXPECT_BINARY_LF);
2815 else {
2816 if (*(args[cur_arg]) != 's')
2817 goto bad_http_kw;
2818 type = TCPCHK_EXPECT_HTTP_BODY_LF;
2819 }
2820
2821 if (!*(args[cur_arg+1])) {
2822 memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
2823 goto error;
2824 }
2825 cur_arg++;
2826 pattern = args[cur_arg];
2827 }
2828 else if (strcmp(args[cur_arg], "status") == 0 || strcmp(args[cur_arg], "rstatus") == 0) {
2829 if (proto != TCPCHK_RULES_HTTP_CHK)
2830 goto bad_tcp_kw;
2831 if (type != TCPCHK_EXPECT_UNDEF) {
2832 memprintf(errmsg, "only on pattern expected");
2833 goto error;
2834 }
2835 type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_HTTP_STATUS : TCPCHK_EXPECT_HTTP_STATUS_REGEX);
2836
2837 if (!*(args[cur_arg+1])) {
2838 memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
2839 goto error;
2840 }
2841 cur_arg++;
2842 pattern = args[cur_arg];
2843 }
2844 else if (strcmp(args[cur_arg], "custom") == 0) {
2845 if (in_pattern) {
2846 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2847 goto error;
2848 }
2849 if (type != TCPCHK_EXPECT_UNDEF) {
2850 memprintf(errmsg, "only on pattern expected");
2851 goto error;
2852 }
2853 type = TCPCHK_EXPECT_CUSTOM;
2854 }
2855 else if (strcmp(args[cur_arg], "hdr") == 0 || strcmp(args[cur_arg], "fhdr") == 0) {
2856 int orig_arg = cur_arg;
2857
2858 if (proto != TCPCHK_RULES_HTTP_CHK)
2859 goto bad_tcp_kw;
2860 if (type != TCPCHK_EXPECT_UNDEF) {
2861 memprintf(errmsg, "only on pattern expected");
2862 goto error;
2863 }
2864 type = TCPCHK_EXPECT_HTTP_HEADER;
2865
2866 if (strcmp(args[cur_arg], "fhdr") == 0)
2867 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_FULL;
2868
2869 /* Parse the name pattern, mandatory */
2870 if (!*(args[cur_arg+1]) || !*(args[cur_arg+2]) ||
2871 (strcmp(args[cur_arg+1], "name") != 0 && strcmp(args[cur_arg+1], "name-lf") != 0)) {
2872 memprintf(errmsg, "'%s' expects at the name keyword as first argument followed by a pattern",
2873 args[orig_arg]);
2874 goto error;
2875 }
2876
2877 if (strcmp(args[cur_arg+1], "name-lf") == 0)
2878 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_FMT;
2879
2880 cur_arg += 2;
2881 if (strcmp(args[cur_arg], "-m") == 0) {
2882 if (!*(args[cur_arg+1])) {
2883 memprintf(errmsg, "'%s' : '%s' expects at a matching pattern ('str', 'beg', 'end', 'sub' or 'reg')",
2884 args[orig_arg], args[cur_arg]);
2885 goto error;
2886 }
2887 if (strcmp(args[cur_arg+1], "str") == 0)
2888 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_STR;
2889 else if (strcmp(args[cur_arg+1], "beg") == 0)
2890 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_BEG;
2891 else if (strcmp(args[cur_arg+1], "end") == 0)
2892 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_END;
2893 else if (strcmp(args[cur_arg+1], "sub") == 0)
2894 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_SUB;
2895 else if (strcmp(args[cur_arg+1], "reg") == 0) {
2896 if (flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT) {
2897 memprintf(errmsg, "'%s': log-format string is not supported with a regex matching method",
2898 args[orig_arg]);
2899 goto error;
2900 }
2901 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_REG;
2902 }
2903 else {
2904 memprintf(errmsg, "'%s' : '%s' only supports 'str', 'beg', 'end', 'sub' or 'reg' (got '%s')",
2905 args[orig_arg], args[cur_arg], args[cur_arg+1]);
2906 goto error;
2907 }
2908 cur_arg += 2;
2909 }
2910 else
2911 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_STR;
2912 npat = args[cur_arg];
2913
2914 if (!*(args[cur_arg+1]) ||
2915 (strcmp(args[cur_arg+1], "value") != 0 && strcmp(args[cur_arg+1], "value-lf") != 0)) {
2916 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_NONE;
2917 goto next;
2918 }
2919 if (strcmp(args[cur_arg+1], "value-lf") == 0)
2920 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_FMT;
2921
2922 /* Parse the value pattern, optional */
2923 if (strcmp(args[cur_arg+2], "-m") == 0) {
2924 cur_arg += 2;
2925 if (!*(args[cur_arg+1])) {
2926 memprintf(errmsg, "'%s' : '%s' expects at a matching pattern ('str', 'beg', 'end', 'sub' or 'reg')",
2927 args[orig_arg], args[cur_arg]);
2928 goto error;
2929 }
2930 if (strcmp(args[cur_arg+1], "str") == 0)
2931 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_STR;
2932 else if (strcmp(args[cur_arg+1], "beg") == 0)
2933 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_BEG;
2934 else if (strcmp(args[cur_arg+1], "end") == 0)
2935 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_END;
2936 else if (strcmp(args[cur_arg+1], "sub") == 0)
2937 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_SUB;
2938 else if (strcmp(args[cur_arg+1], "reg") == 0) {
2939 if (flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT) {
2940 memprintf(errmsg, "'%s': log-format string is not supported with a regex matching method",
2941 args[orig_arg]);
2942 goto error;
2943 }
2944 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_REG;
2945 }
2946 else {
2947 memprintf(errmsg, "'%s' : '%s' only supports 'str', 'beg', 'end', 'sub' or 'reg' (got '%s')",
2948 args[orig_arg], args[cur_arg], args[cur_arg+1]);
2949 goto error;
2950 }
2951 }
2952 else
2953 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_STR;
2954
2955 if (!*(args[cur_arg+2])) {
2956 memprintf(errmsg, "'%s' expect a pattern with the value keyword", args[orig_arg]);
2957 goto error;
2958 }
2959 vpat = args[cur_arg+2];
2960 cur_arg += 2;
2961 }
2962 else if (strcmp(args[cur_arg], "comment") == 0) {
2963 if (in_pattern) {
2964 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2965 goto error;
2966 }
2967 if (!*(args[cur_arg+1])) {
2968 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
2969 goto error;
2970 }
2971 cur_arg++;
2972 free(comment);
2973 comment = strdup(args[cur_arg]);
2974 if (!comment) {
2975 memprintf(errmsg, "out of memory");
2976 goto error;
2977 }
2978 }
2979 else if (strcmp(args[cur_arg], "on-success") == 0) {
2980 if (in_pattern) {
2981 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2982 goto error;
2983 }
2984 if (!*(args[cur_arg+1])) {
2985 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
2986 goto error;
2987 }
2988 cur_arg++;
2989 on_success_msg = args[cur_arg];
2990 }
2991 else if (strcmp(args[cur_arg], "on-error") == 0) {
2992 if (in_pattern) {
2993 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2994 goto error;
2995 }
2996 if (!*(args[cur_arg+1])) {
2997 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
2998 goto error;
2999 }
3000 cur_arg++;
3001 on_error_msg = args[cur_arg];
3002 }
3003 else if (strcmp(args[cur_arg], "ok-status") == 0) {
3004 if (in_pattern) {
3005 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
3006 goto error;
3007 }
3008 if (!*(args[cur_arg+1])) {
3009 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
3010 goto error;
3011 }
3012 if (strcasecmp(args[cur_arg+1], "L7OK") == 0)
3013 ok_st = HCHK_STATUS_L7OKD;
3014 else if (strcasecmp(args[cur_arg+1], "L7OKC") == 0)
3015 ok_st = HCHK_STATUS_L7OKCD;
3016 else if (strcasecmp(args[cur_arg+1], "L6OK") == 0)
3017 ok_st = HCHK_STATUS_L6OK;
3018 else if (strcasecmp(args[cur_arg+1], "L4OK") == 0)
3019 ok_st = HCHK_STATUS_L4OK;
3020 else {
3021 memprintf(errmsg, "'%s' only supports 'L4OK', 'L6OK', 'L7OK' or 'L7OKC' status (got '%s').",
3022 args[cur_arg], args[cur_arg+1]);
3023 goto error;
3024 }
3025 cur_arg++;
3026 }
3027 else if (strcmp(args[cur_arg], "error-status") == 0) {
3028 if (in_pattern) {
3029 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
3030 goto error;
3031 }
3032 if (!*(args[cur_arg+1])) {
3033 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
3034 goto error;
3035 }
3036 if (strcasecmp(args[cur_arg+1], "L7RSP") == 0)
3037 err_st = HCHK_STATUS_L7RSP;
3038 else if (strcasecmp(args[cur_arg+1], "L7STS") == 0)
3039 err_st = HCHK_STATUS_L7STS;
3040 else if (strcasecmp(args[cur_arg+1], "L6RSP") == 0)
3041 err_st = HCHK_STATUS_L6RSP;
3042 else if (strcasecmp(args[cur_arg+1], "L4CON") == 0)
3043 err_st = HCHK_STATUS_L4CON;
3044 else {
3045 memprintf(errmsg, "'%s' only supports 'L4CON', 'L6RSP', 'L7RSP' or 'L7STS' status (got '%s').",
3046 args[cur_arg], args[cur_arg+1]);
3047 goto error;
3048 }
3049 cur_arg++;
3050 }
3051 else if (strcmp(args[cur_arg], "status-code") == 0) {
3052 int idx = 0;
3053
3054 if (in_pattern) {
3055 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
3056 goto error;
3057 }
3058 if (!*(args[cur_arg+1])) {
3059 memprintf(errmsg, "'%s' expects an expression as argument", args[cur_arg]);
3060 goto error;
3061 }
3062
3063 cur_arg++;
3064 release_sample_expr(status_expr);
3065 px->conf.args.ctx = ARGC_SRV;
3066 status_expr = sample_parse_expr((char *[]){args[cur_arg], NULL}, &idx,
3067 file, line, errmsg, &px->conf.args, NULL);
3068 if (!status_expr) {
3069 memprintf(errmsg, "error detected while parsing status-code expression : %s", *errmsg);
3070 goto error;
3071 }
3072 if (!(status_expr->fetch->val & SMP_VAL_BE_CHK_RUL)) {
3073 memprintf(errmsg, "error detected while parsing status-code expression : "
3074 " fetch method '%s' extracts information from '%s', "
3075 "none of which is available here.\n",
3076 args[cur_arg], sample_src_names(status_expr->fetch->use));
3077 goto error;
3078 }
3079 px->http_needed |= !!(status_expr->fetch->use & SMP_USE_HTTP_ANY);
3080 }
3081 else if (strcmp(args[cur_arg], "tout-status") == 0) {
3082 if (in_pattern) {
3083 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
3084 goto error;
3085 }
3086 if (!*(args[cur_arg+1])) {
3087 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
3088 goto error;
3089 }
3090 if (strcasecmp(args[cur_arg+1], "L7TOUT") == 0)
3091 tout_st = HCHK_STATUS_L7TOUT;
3092 else if (strcasecmp(args[cur_arg+1], "L6TOUT") == 0)
3093 tout_st = HCHK_STATUS_L6TOUT;
3094 else if (strcasecmp(args[cur_arg+1], "L4TOUT") == 0)
3095 tout_st = HCHK_STATUS_L4TOUT;
3096 else {
3097 memprintf(errmsg, "'%s' only supports 'L4TOUT', 'L6TOUT' or 'L7TOUT' status (got '%s').",
3098 args[cur_arg], args[cur_arg+1]);
3099 goto error;
3100 }
3101 cur_arg++;
3102 }
3103 else {
3104 if (proto == TCPCHK_RULES_HTTP_CHK) {
3105 bad_http_kw:
3106 memprintf(errmsg, "'only supports min-recv, [!]string', '[!]rstring', '[!]string-lf', '[!]status', "
3107 "'[!]rstatus', [!]hdr, [!]fhdr or comment but got '%s' as argument.", args[cur_arg]);
3108 }
3109 else {
3110 bad_tcp_kw:
3111 memprintf(errmsg, "'only supports min-recv, '[!]binary', '[!]string', '[!]rstring', '[!]string-lf'"
3112 "'[!]rbinary', '[!]binary-lf' or comment but got '%s' as argument.", args[cur_arg]);
3113 }
3114 goto error;
3115 }
3116 next:
3117 cur_arg++;
3118 }
3119
3120 chk = calloc(1, sizeof(*chk));
3121 if (!chk) {
3122 memprintf(errmsg, "out of memory");
3123 goto error;
3124 }
3125 chk->action = TCPCHK_ACT_EXPECT;
3126 LIST_INIT(&chk->expect.onerror_fmt);
3127 LIST_INIT(&chk->expect.onsuccess_fmt);
3128 chk->comment = comment; comment = NULL;
3129 chk->expect.type = type;
3130 chk->expect.min_recv = min_recv;
3131 chk->expect.flags = flags | (inverse ? TCPCHK_EXPT_FL_INV : 0);
3132 chk->expect.ok_status = ok_st;
3133 chk->expect.err_status = err_st;
3134 chk->expect.tout_status = tout_st;
3135 chk->expect.status_expr = status_expr; status_expr = NULL;
3136
3137 if (on_success_msg) {
3138 px->conf.args.ctx = ARGC_SRV;
3139 if (!parse_logformat_string(on_success_msg, px, &chk->expect.onsuccess_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3140 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", on_success_msg, *errmsg);
3141 goto error;
3142 }
3143 }
3144 if (on_error_msg) {
3145 px->conf.args.ctx = ARGC_SRV;
3146 if (!parse_logformat_string(on_error_msg, px, &chk->expect.onerror_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3147 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", on_error_msg, *errmsg);
3148 goto error;
3149 }
3150 }
3151
3152 switch (chk->expect.type) {
3153 case TCPCHK_EXPECT_HTTP_STATUS: {
3154 const char *p = pattern;
3155 unsigned int c1,c2;
3156
3157 chk->expect.codes.codes = NULL;
3158 chk->expect.codes.num = 0;
3159 while (1) {
3160 c1 = c2 = read_uint(&p, pattern + strlen(pattern));
3161 if (*p == '-') {
3162 p++;
3163 c2 = read_uint(&p, pattern + strlen(pattern));
3164 }
3165 if (c1 > c2) {
3166 memprintf(errmsg, "invalid range of status codes '%s'", pattern);
3167 goto error;
3168 }
3169
3170 chk->expect.codes.num++;
3171 chk->expect.codes.codes = my_realloc2(chk->expect.codes.codes,
3172 chk->expect.codes.num * sizeof(*chk->expect.codes.codes));
3173 if (!chk->expect.codes.codes) {
3174 memprintf(errmsg, "out of memory");
3175 goto error;
3176 }
3177 chk->expect.codes.codes[chk->expect.codes.num-1][0] = c1;
3178 chk->expect.codes.codes[chk->expect.codes.num-1][1] = c2;
3179
3180 if (*p == '\0')
3181 break;
3182 if (*p != ',') {
3183 memprintf(errmsg, "invalid character '%c' in the list of status codes", *p);
3184 goto error;
3185 }
3186 p++;
3187 }
3188 break;
3189 }
3190 case TCPCHK_EXPECT_STRING:
3191 case TCPCHK_EXPECT_HTTP_BODY:
3192 chk->expect.data = ist2(strdup(pattern), strlen(pattern));
3193 if (!isttest(chk->expect.data)) {
3194 memprintf(errmsg, "out of memory");
3195 goto error;
3196 }
3197 break;
3198 case TCPCHK_EXPECT_BINARY: {
3199 int len = chk->expect.data.len;
3200
3201 if (parse_binary(pattern, &chk->expect.data.ptr, &len, errmsg) == 0) {
3202 memprintf(errmsg, "invalid binary string (%s)", *errmsg);
3203 goto error;
3204 }
3205 chk->expect.data.len = len;
3206 break;
3207 }
3208 case TCPCHK_EXPECT_STRING_REGEX:
3209 case TCPCHK_EXPECT_BINARY_REGEX:
3210 case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
3211 case TCPCHK_EXPECT_HTTP_BODY_REGEX:
3212 chk->expect.regex = regex_comp(pattern, 1, 0, errmsg);
3213 if (!chk->expect.regex)
3214 goto error;
3215 break;
3216
3217 case TCPCHK_EXPECT_STRING_LF:
3218 case TCPCHK_EXPECT_BINARY_LF:
3219 case TCPCHK_EXPECT_HTTP_BODY_LF:
3220 LIST_INIT(&chk->expect.fmt);
3221 px->conf.args.ctx = ARGC_SRV;
3222 if (!parse_logformat_string(pattern, px, &chk->expect.fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3223 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", pattern, *errmsg);
3224 goto error;
3225 }
3226 break;
3227
3228 case TCPCHK_EXPECT_HTTP_HEADER:
3229 if (!npat) {
3230 memprintf(errmsg, "unexpected error, undefined header name pattern");
3231 goto error;
3232 }
3233 if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_REG) {
3234 chk->expect.hdr.name_re = regex_comp(npat, 0, 0, errmsg);
3235 if (!chk->expect.hdr.name_re)
3236 goto error;
3237 }
3238 else if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT) {
3239 px->conf.args.ctx = ARGC_SRV;
3240 LIST_INIT(&chk->expect.hdr.name_fmt);
3241 if (!parse_logformat_string(npat, px, &chk->expect.hdr.name_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3242 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", npat, *errmsg);
3243 goto error;
3244 }
3245 }
3246 else {
3247 chk->expect.hdr.name = ist2(strdup(npat), strlen(npat));
3248 if (!isttest(chk->expect.hdr.name)) {
3249 memprintf(errmsg, "out of memory");
3250 goto error;
3251 }
3252 }
3253
3254 if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_NONE) {
3255 chk->expect.hdr.value = IST_NULL;
3256 break;
3257 }
3258
3259 if (!vpat) {
3260 memprintf(errmsg, "unexpected error, undefined header value pattern");
3261 goto error;
3262 }
3263 else if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_REG) {
3264 chk->expect.hdr.value_re = regex_comp(vpat, 1, 0, errmsg);
3265 if (!chk->expect.hdr.value_re)
3266 goto error;
3267 }
3268 else if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT) {
3269 px->conf.args.ctx = ARGC_SRV;
3270 LIST_INIT(&chk->expect.hdr.value_fmt);
3271 if (!parse_logformat_string(vpat, px, &chk->expect.hdr.value_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3272 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", npat, *errmsg);
3273 goto error;
3274 }
3275 }
3276 else {
3277 chk->expect.hdr.value = ist2(strdup(vpat), strlen(vpat));
3278 if (!isttest(chk->expect.hdr.value)) {
3279 memprintf(errmsg, "out of memory");
3280 goto error;
3281 }
3282 }
3283
3284 break;
3285 case TCPCHK_EXPECT_CUSTOM:
3286 chk->expect.custom = NULL; /* Must be defined by the caller ! */
3287 break;
3288 case TCPCHK_EXPECT_UNDEF:
3289 memprintf(errmsg, "pattern not found");
3290 goto error;
3291 }
3292
3293 /* All tcp-check expect points back to the first inverse expect rule in
3294 * a chain of one or more expect rule, potentially itself.
3295 */
3296 chk->expect.head = chk;
3297 list_for_each_entry_rev(prev_check, rules, list) {
3298 if (prev_check->action == TCPCHK_ACT_EXPECT) {
3299 if (prev_check->expect.flags & TCPCHK_EXPT_FL_INV)
3300 chk->expect.head = prev_check;
3301 continue;
3302 }
3303 if (prev_check->action != TCPCHK_ACT_COMMENT && prev_check->action != TCPCHK_ACT_ACTION_KW)
3304 break;
3305 }
3306 return chk;
3307
3308 error:
3309 free_tcpcheck(chk, 0);
3310 free(comment);
3311 release_sample_expr(status_expr);
3312 return NULL;
3313}
3314
3315/* Overwrites fields of the old http send rule with those of the new one. When
3316 * replaced, old values are freed and replaced by the new ones. New values are
3317 * not copied but transferred. At the end <new> should be empty and can be
3318 * safely released. This function never fails.
3319 */
3320void tcpcheck_overwrite_send_http_rule(struct tcpcheck_rule *old, struct tcpcheck_rule *new)
3321{
3322 struct logformat_node *lf, *lfb;
3323 struct tcpcheck_http_hdr *hdr, *bhdr;
3324
3325
3326 if (new->send.http.meth.str.area) {
3327 free(old->send.http.meth.str.area);
3328 old->send.http.meth.meth = new->send.http.meth.meth;
3329 old->send.http.meth.str.area = new->send.http.meth.str.area;
3330 old->send.http.meth.str.data = new->send.http.meth.str.data;
3331 new->send.http.meth.str = BUF_NULL;
3332 }
3333
3334 if (!(new->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) && isttest(new->send.http.uri)) {
3335 if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT))
3336 istfree(&old->send.http.uri);
3337 else
3338 free_tcpcheck_fmt(&old->send.http.uri_fmt);
3339 old->send.http.flags &= ~TCPCHK_SND_HTTP_FL_URI_FMT;
3340 old->send.http.uri = new->send.http.uri;
3341 new->send.http.uri = IST_NULL;
3342 }
3343 else if ((new->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) && !LIST_ISEMPTY(&new->send.http.uri_fmt)) {
3344 if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT))
3345 istfree(&old->send.http.uri);
3346 else
3347 free_tcpcheck_fmt(&old->send.http.uri_fmt);
3348 old->send.http.flags |= TCPCHK_SND_HTTP_FL_URI_FMT;
3349 LIST_INIT(&old->send.http.uri_fmt);
3350 list_for_each_entry_safe(lf, lfb, &new->send.http.uri_fmt, list) {
3351 LIST_DEL(&lf->list);
3352 LIST_ADDQ(&old->send.http.uri_fmt, &lf->list);
3353 }
3354 }
3355
3356 if (isttest(new->send.http.vsn)) {
3357 istfree(&old->send.http.vsn);
3358 old->send.http.vsn = new->send.http.vsn;
3359 new->send.http.vsn = IST_NULL;
3360 }
3361
3362 free_tcpcheck_http_hdrs(&old->send.http.hdrs);
3363 list_for_each_entry_safe(hdr, bhdr, &new->send.http.hdrs, list) {
3364 LIST_DEL(&hdr->list);
3365 LIST_ADDQ(&old->send.http.hdrs, &hdr->list);
3366 }
3367
3368 if (!(new->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) && isttest(new->send.http.body)) {
3369 if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT))
3370 istfree(&old->send.http.body);
3371 else
3372 free_tcpcheck_fmt(&old->send.http.body_fmt);
3373 old->send.http.flags &= ~TCPCHK_SND_HTTP_FL_BODY_FMT;
3374 old->send.http.body = new->send.http.body;
3375 new->send.http.body = IST_NULL;
3376 }
3377 else if ((new->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) && !LIST_ISEMPTY(&new->send.http.body_fmt)) {
3378 if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT))
3379 istfree(&old->send.http.body);
3380 else
3381 free_tcpcheck_fmt(&old->send.http.body_fmt);
3382 old->send.http.flags |= TCPCHK_SND_HTTP_FL_BODY_FMT;
3383 LIST_INIT(&old->send.http.body_fmt);
3384 list_for_each_entry_safe(lf, lfb, &new->send.http.body_fmt, list) {
3385 LIST_DEL(&lf->list);
3386 LIST_ADDQ(&old->send.http.body_fmt, &lf->list);
3387 }
3388 }
3389}
3390
3391/* Internal function used to add an http-check rule in a list during the config
3392 * parsing step. Depending on its type, and the previously inserted rules, a
3393 * specific action may be performed or an error may be reported. This functions
3394 * returns 1 on success and 0 on error and <errmsg> is filled with the error
3395 * message.
3396 */
3397int tcpcheck_add_http_rule(struct tcpcheck_rule *chk, struct tcpcheck_rules *rules, char **errmsg)
3398{
3399 struct tcpcheck_rule *r;
3400
3401 /* the implicit send rule coming from an "option httpchk" line must be
3402 * merged with the first explici http-check send rule, if
Ilya Shipitsin47d17182020-06-21 21:42:57 +05003403 * any. Depending on the declaration order some tests are required.
Willy Tarreau51cd5952020-06-05 12:25:38 +02003404 *
Ilya Shipitsin47d17182020-06-21 21:42:57 +05003405 * Some tests are also required for other kinds of http-check rules to be
Willy Tarreau51cd5952020-06-05 12:25:38 +02003406 * sure the ruleset remains valid.
3407 */
3408
3409 if (chk->action == TCPCHK_ACT_SEND && (chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) {
3410 /* Tries to add an implicit http-check send rule from an "option httpchk" line.
3411 * First, the first rule is retrieved, skipping the first CONNECT, if any, and
3412 * following tests are performed :
3413 *
3414 * 1- If there is no such rule or if it is not a send rule, the implicit send
3415 * rule is pushed in front of the ruleset
3416 *
3417 * 2- If it is another implicit send rule, it is replaced with the new one.
3418 *
3419 * 3- Otherwise, it means it is an explicit send rule. In this case we merge
3420 * both, overwriting the old send rule (the explicit one) with info of the
3421 * new send rule (the implicit one).
3422 */
3423 r = get_first_tcpcheck_rule(rules);
3424 if (r && r->action == TCPCHK_ACT_CONNECT)
3425 r = get_next_tcpcheck_rule(rules, r);
3426 if (!r || r->action != TCPCHK_ACT_SEND)
3427 LIST_ADD(rules->list, &chk->list);
3428 else if (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT) {
3429 LIST_DEL(&r->list);
3430 free_tcpcheck(r, 0);
3431 LIST_ADD(rules->list, &chk->list);
3432 }
3433 else {
3434 tcpcheck_overwrite_send_http_rule(r, chk);
3435 free_tcpcheck(chk, 0);
3436 }
3437 }
3438 else {
3439 /* Tries to add an explicit http-check rule. First of all we check the typefo the
3440 * last inserted rule to be sure it is valid. Then for send rule, we try to merge it
3441 * with an existing implicit send rule, if any. At the end, if there is no error,
3442 * the rule is appended to the list.
3443 */
3444
3445 r = get_last_tcpcheck_rule(rules);
3446 if (!r || (r->action == TCPCHK_ACT_SEND && (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)))
3447 /* no error */;
3448 else if (r->action != TCPCHK_ACT_CONNECT && chk->action == TCPCHK_ACT_SEND) {
3449 memprintf(errmsg, "unable to add http-check send rule at step %d (missing connect rule).",
3450 chk->index+1);
3451 return 0;
3452 }
3453 else if (r->action != TCPCHK_ACT_SEND && r->action != TCPCHK_ACT_EXPECT && chk->action == TCPCHK_ACT_EXPECT) {
3454 memprintf(errmsg, "unable to add http-check expect rule at step %d (missing send rule).",
3455 chk->index+1);
3456 return 0;
3457 }
3458 else if (r->action != TCPCHK_ACT_EXPECT && chk->action == TCPCHK_ACT_CONNECT) {
3459 memprintf(errmsg, "unable to add http-check connect rule at step %d (missing expect rule).",
3460 chk->index+1);
3461 return 0;
3462 }
3463
3464 if (chk->action == TCPCHK_ACT_SEND) {
3465 r = get_first_tcpcheck_rule(rules);
3466 if (r && r->action == TCPCHK_ACT_SEND && (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) {
3467 tcpcheck_overwrite_send_http_rule(r, chk);
3468 free_tcpcheck(chk, 0);
3469 LIST_DEL(&r->list);
3470 r->send.http.flags &= ~TCPCHK_SND_HTTP_FROM_OPT;
3471 chk = r;
3472 }
3473 }
3474 LIST_ADDQ(rules->list, &chk->list);
3475 }
3476 return 1;
3477}
3478
3479/* Check tcp-check health-check configuration for the proxy <px>. */
3480static int check_proxy_tcpcheck(struct proxy *px)
3481{
3482 struct tcpcheck_rule *chk, *back;
3483 char *comment = NULL, *errmsg = NULL;
3484 enum tcpcheck_rule_type prev_action = TCPCHK_ACT_COMMENT;
3485 int ret = 0;
3486
3487 if (!(px->cap & PR_CAP_BE) || (px->options2 & PR_O2_CHK_ANY) != PR_O2_TCPCHK_CHK) {
3488 deinit_proxy_tcpcheck(px);
3489 goto out;
3490 }
3491
3492 free(px->check_command);
3493 free(px->check_path);
3494 px->check_command = px->check_path = NULL;
3495
3496 if (!px->tcpcheck_rules.list) {
3497 ha_alert("config : proxy '%s' : tcp-check configured but no ruleset defined.\n", px->id);
3498 ret |= ERR_ALERT | ERR_FATAL;
3499 goto out;
3500 }
3501
3502 /* HTTP ruleset only : */
3503 if ((px->tcpcheck_rules.flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK) {
3504 struct tcpcheck_rule *next;
3505
3506 /* move remaining implicit send rule from "option httpchk" line to the right place.
3507 * If such rule exists, it must be the first one. In this case, the rule is moved
3508 * after the first connect rule, if any. Otherwise, nothing is done.
3509 */
3510 chk = get_first_tcpcheck_rule(&px->tcpcheck_rules);
3511 if (chk && chk->action == TCPCHK_ACT_SEND && (chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) {
3512 next = get_next_tcpcheck_rule(&px->tcpcheck_rules, chk);
3513 if (next && next->action == TCPCHK_ACT_CONNECT) {
3514 LIST_DEL(&chk->list);
3515 LIST_ADD(&next->list, &chk->list);
3516 chk->index = next->index;
3517 }
3518 }
3519
3520 /* add implicit expect rule if the last one is a send. It is inherited from previous
3521 * versions where the http expect rule was optional. Now it is possible to chained
3522 * send/expect rules but the last expect may still be implicit.
3523 */
3524 chk = get_last_tcpcheck_rule(&px->tcpcheck_rules);
3525 if (chk && chk->action == TCPCHK_ACT_SEND) {
3526 next = parse_tcpcheck_expect((char *[]){"http-check", "expect", "status", "200-399", ""},
3527 1, px, px->tcpcheck_rules.list, TCPCHK_RULES_HTTP_CHK,
3528 px->conf.file, px->conf.line, &errmsg);
3529 if (!next) {
3530 ha_alert("config : proxy '%s': unable to add implicit http-check expect rule "
3531 "(%s).\n", px->id, errmsg);
3532 free(errmsg);
3533 ret |= ERR_ALERT | ERR_FATAL;
3534 goto out;
3535 }
3536 LIST_ADDQ(px->tcpcheck_rules.list, &next->list);
3537 next->index = chk->index;
3538 }
3539 }
3540
3541 /* For all ruleset: */
3542
3543 /* If there is no connect rule preceding all send / expect rules, an
3544 * implicit one is inserted before all others.
3545 */
3546 chk = get_first_tcpcheck_rule(&px->tcpcheck_rules);
3547 if (!chk || chk->action != TCPCHK_ACT_CONNECT) {
3548 chk = calloc(1, sizeof(*chk));
3549 if (!chk) {
3550 ha_alert("config : proxy '%s': unable to add implicit tcp-check connect rule "
3551 "(out of memory).\n", px->id);
3552 ret |= ERR_ALERT | ERR_FATAL;
3553 goto out;
3554 }
3555 chk->action = TCPCHK_ACT_CONNECT;
3556 chk->connect.options = (TCPCHK_OPT_DEFAULT_CONNECT|TCPCHK_OPT_IMPLICIT);
3557 LIST_ADD(px->tcpcheck_rules.list, &chk->list);
3558 }
3559
3560 /* Remove all comment rules. To do so, when a such rule is found, the
3561 * comment is assigned to the following rule(s).
3562 */
3563 list_for_each_entry_safe(chk, back, px->tcpcheck_rules.list, list) {
3564 if (chk->action != prev_action && prev_action != TCPCHK_ACT_COMMENT) {
3565 free(comment);
3566 comment = NULL;
3567 }
3568
3569 prev_action = chk->action;
3570 switch (chk->action) {
3571 case TCPCHK_ACT_COMMENT:
3572 free(comment);
3573 comment = chk->comment;
3574 LIST_DEL(&chk->list);
3575 free(chk);
3576 break;
3577 case TCPCHK_ACT_CONNECT:
3578 if (!chk->comment && comment)
3579 chk->comment = strdup(comment);
Tim Duesterhus588b3142020-05-29 14:35:51 +02003580 /* fall through */
Willy Tarreau51cd5952020-06-05 12:25:38 +02003581 case TCPCHK_ACT_ACTION_KW:
3582 free(comment);
3583 comment = NULL;
3584 break;
3585 case TCPCHK_ACT_SEND:
3586 case TCPCHK_ACT_EXPECT:
3587 if (!chk->comment && comment)
3588 chk->comment = strdup(comment);
3589 break;
3590 }
3591 }
3592 free(comment);
3593 comment = NULL;
3594
3595 out:
3596 return ret;
3597}
3598
3599void deinit_proxy_tcpcheck(struct proxy *px)
3600{
3601 free_tcpcheck_vars(&px->tcpcheck_rules.preset_vars);
3602 px->tcpcheck_rules.flags = 0;
3603 px->tcpcheck_rules.list = NULL;
3604}
3605
3606static void deinit_tcpchecks()
3607{
3608 struct tcpcheck_ruleset *rs;
3609 struct tcpcheck_rule *r, *rb;
3610 struct ebpt_node *node, *next;
3611
3612 node = ebpt_first(&shared_tcpchecks);
3613 while (node) {
3614 next = ebpt_next(node);
3615 ebpt_delete(node);
3616 free(node->key);
3617 rs = container_of(node, typeof(*rs), node);
3618 list_for_each_entry_safe(r, rb, &rs->rules, list) {
3619 LIST_DEL(&r->list);
3620 free_tcpcheck(r, 0);
3621 }
3622 free(rs);
3623 node = next;
3624 }
3625}
3626
3627int add_tcpcheck_expect_str(struct tcpcheck_rules *rules, const char *str)
3628{
3629 struct tcpcheck_rule *tcpcheck, *prev_check;
3630 struct tcpcheck_expect *expect;
3631
3632 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
3633 return 0;
3634 memset(tcpcheck, 0, sizeof(*tcpcheck));
3635 tcpcheck->action = TCPCHK_ACT_EXPECT;
3636
3637 expect = &tcpcheck->expect;
3638 expect->type = TCPCHK_EXPECT_STRING;
3639 LIST_INIT(&expect->onerror_fmt);
3640 LIST_INIT(&expect->onsuccess_fmt);
3641 expect->ok_status = HCHK_STATUS_L7OKD;
3642 expect->err_status = HCHK_STATUS_L7RSP;
3643 expect->tout_status = HCHK_STATUS_L7TOUT;
3644 expect->data = ist2(strdup(str), strlen(str));
3645 if (!isttest(expect->data)) {
3646 pool_free(pool_head_tcpcheck_rule, tcpcheck);
3647 return 0;
3648 }
3649
3650 /* All tcp-check expect points back to the first inverse expect rule
3651 * in a chain of one or more expect rule, potentially itself.
3652 */
3653 tcpcheck->expect.head = tcpcheck;
3654 list_for_each_entry_rev(prev_check, rules->list, list) {
3655 if (prev_check->action == TCPCHK_ACT_EXPECT) {
3656 if (prev_check->expect.flags & TCPCHK_EXPT_FL_INV)
3657 tcpcheck->expect.head = prev_check;
3658 continue;
3659 }
3660 if (prev_check->action != TCPCHK_ACT_COMMENT && prev_check->action != TCPCHK_ACT_ACTION_KW)
3661 break;
3662 }
3663 LIST_ADDQ(rules->list, &tcpcheck->list);
3664 return 1;
3665}
3666
3667int add_tcpcheck_send_strs(struct tcpcheck_rules *rules, const char * const *strs)
3668{
3669 struct tcpcheck_rule *tcpcheck;
3670 struct tcpcheck_send *send;
3671 const char *in;
3672 char *dst;
3673 int i;
3674
3675 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
3676 return 0;
3677 memset(tcpcheck, 0, sizeof(*tcpcheck));
3678 tcpcheck->action = TCPCHK_ACT_SEND;
3679
3680 send = &tcpcheck->send;
3681 send->type = TCPCHK_SEND_STRING;
3682
3683 for (i = 0; strs[i]; i++)
3684 send->data.len += strlen(strs[i]);
3685
3686 send->data.ptr = malloc(istlen(send->data) + 1);
3687 if (!isttest(send->data)) {
3688 pool_free(pool_head_tcpcheck_rule, tcpcheck);
3689 return 0;
3690 }
3691
3692 dst = istptr(send->data);
3693 for (i = 0; strs[i]; i++)
3694 for (in = strs[i]; (*dst = *in++); dst++);
3695 *dst = 0;
3696
3697 LIST_ADDQ(rules->list, &tcpcheck->list);
3698 return 1;
3699}
3700
3701/* Parses the "tcp-check" proxy keyword */
3702static int proxy_parse_tcpcheck(char **args, int section, struct proxy *curpx,
3703 struct proxy *defpx, const char *file, int line,
3704 char **errmsg)
3705{
3706 struct tcpcheck_ruleset *rs = NULL;
3707 struct tcpcheck_rule *chk = NULL;
3708 int index, cur_arg, ret = 0;
3709
3710 if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[0], NULL))
3711 ret = 1;
3712
3713 /* Deduce the ruleset name from the proxy info */
3714 chunk_printf(&trash, "*tcp-check-%s_%s-%d",
3715 ((curpx == defpx) ? "defaults" : curpx->id),
3716 curpx->conf.file, curpx->conf.line);
3717
3718 rs = find_tcpcheck_ruleset(b_orig(&trash));
3719 if (rs == NULL) {
3720 rs = create_tcpcheck_ruleset(b_orig(&trash));
3721 if (rs == NULL) {
3722 memprintf(errmsg, "out of memory.\n");
3723 goto error;
3724 }
3725 }
3726
3727 index = 0;
3728 if (!LIST_ISEMPTY(&rs->rules)) {
3729 chk = LIST_PREV(&rs->rules, typeof(chk), list);
3730 index = chk->index + 1;
3731 }
3732
3733 cur_arg = 1;
3734 if (strcmp(args[cur_arg], "connect") == 0)
3735 chk = parse_tcpcheck_connect(args, cur_arg, curpx, &rs->rules, file, line, errmsg);
3736 else if (strcmp(args[cur_arg], "send") == 0 || strcmp(args[cur_arg], "send-binary") == 0 ||
3737 strcmp(args[cur_arg], "send-lf") == 0 || strcmp(args[cur_arg], "send-binary-lf") == 0)
3738 chk = parse_tcpcheck_send(args, cur_arg, curpx, &rs->rules, file, line, errmsg);
3739 else if (strcmp(args[cur_arg], "expect") == 0)
3740 chk = parse_tcpcheck_expect(args, cur_arg, curpx, &rs->rules, 0, file, line, errmsg);
3741 else if (strcmp(args[cur_arg], "comment") == 0)
3742 chk = parse_tcpcheck_comment(args, cur_arg, curpx, &rs->rules, file, line, errmsg);
3743 else {
3744 struct action_kw *kw = action_kw_tcp_check_lookup(args[cur_arg]);
3745
3746 if (!kw) {
3747 action_kw_tcp_check_build_list(&trash);
3748 memprintf(errmsg, "'%s' only supports 'comment', 'connect', 'send', 'send-binary', 'expect'"
3749 "%s%s. but got '%s'",
3750 args[0], (*trash.area ? ", " : ""), trash.area, args[1]);
3751 goto error;
3752 }
3753 chk = parse_tcpcheck_action(args, cur_arg, curpx, &rs->rules, kw, file, line, errmsg);
3754 }
3755
3756 if (!chk) {
3757 memprintf(errmsg, "'%s %s' : %s.", args[0], args[1], *errmsg);
3758 goto error;
3759 }
3760 ret = (ret || (*errmsg != NULL)); /* Handle warning */
3761
3762 /* No error: add the tcp-check rule in the list */
3763 chk->index = index;
3764 LIST_ADDQ(&rs->rules, &chk->list);
3765
3766 if ((curpx->options2 & PR_O2_CHK_ANY) == PR_O2_TCPCHK_CHK &&
3767 (curpx->tcpcheck_rules.flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_TCP_CHK) {
3768 /* Use this ruleset if the proxy already has tcp-check enabled */
3769 curpx->tcpcheck_rules.list = &rs->rules;
3770 curpx->tcpcheck_rules.flags &= ~TCPCHK_RULES_UNUSED_TCP_RS;
3771 }
3772 else {
3773 /* mark this ruleset as unused for now */
3774 curpx->tcpcheck_rules.flags |= TCPCHK_RULES_UNUSED_TCP_RS;
3775 }
3776
3777 return ret;
3778
3779 error:
3780 free_tcpcheck(chk, 0);
3781 free_tcpcheck_ruleset(rs);
3782 return -1;
3783}
3784
3785static struct cfg_kw_list cfg_kws = {ILH, {
3786 { CFG_LISTEN, "tcp-check", proxy_parse_tcpcheck },
3787 { 0, NULL, NULL },
3788}};
3789
3790REGISTER_POST_PROXY_CHECK(check_proxy_tcpcheck);
3791REGISTER_PROXY_DEINIT(deinit_proxy_tcpcheck);
3792REGISTER_POST_DEINIT(deinit_tcpchecks);
3793INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);