blob: b9ef3802bd0ac441d5765be4411a6d7b9d18e525 [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
996 /* 2- prepare new connection */
Christopher Faulet236c93b2020-07-02 09:19:54 +0200997 cs = cs_new(NULL, (s ? &s->obj_type : &proxy->obj_type));
Willy Tarreau51cd5952020-06-05 12:25:38 +0200998 if (!cs) {
999 chunk_printf(&trash, "TCPCHK error allocating connection at step %d",
1000 tcpcheck_get_step_id(check, rule));
1001 if (rule->comment)
1002 chunk_appendf(&trash, " comment: '%s'", rule->comment);
1003 set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area);
1004 ret = TCPCHK_EVAL_STOP;
1005 goto out;
1006 }
1007
1008 /* 3- release and replace the old one on success */
1009 if (check->cs) {
1010 if (check->wait_list.events)
1011 check->cs->conn->mux->unsubscribe(check->cs, check->wait_list.events,
1012 &check->wait_list);
1013
1014 /* We may have been scheduled to run, and the I/O handler
1015 * expects to have a cs, so remove the tasklet
1016 */
1017 tasklet_remove_from_tasklet_list(check->wait_list.tasklet);
1018 cs_destroy(check->cs);
1019 }
1020
1021 tasklet_set_tid(check->wait_list.tasklet, tid);
1022
1023 check->cs = cs;
1024 conn = cs->conn;
1025 conn_set_owner(conn, check->sess, NULL);
1026
1027 /* Maybe there were an older connection we were waiting on */
1028 check->wait_list.events = 0;
Willy Tarreau51cd5952020-06-05 12:25:38 +02001029
1030 /* no client address */
1031 if (!sockaddr_alloc(&conn->dst)) {
1032 status = SF_ERR_RESOURCE;
1033 goto fail_check;
1034 }
1035
1036 /* connect to the connect rule addr if specified, otherwise the check
1037 * addr if specified on the server. otherwise, use the server addr (it
1038 * MUST exist at this step).
1039 */
1040 *conn->dst = (is_addr(&connect->addr)
1041 ? connect->addr
1042 : (is_addr(&check->addr) ? check->addr : s->addr));
1043 proto = protocol_by_family(conn->dst->ss_family);
1044
1045 port = 0;
1046 if (!port && connect->port)
1047 port = connect->port;
1048 if (!port && connect->port_expr) {
1049 struct sample *smp;
1050
1051 smp = sample_fetch_as_type(check->proxy, check->sess, NULL,
1052 SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
1053 connect->port_expr, SMP_T_SINT);
1054 if (smp)
1055 port = smp->data.u.sint;
1056 }
1057 if (!port && is_inet_addr(&connect->addr))
1058 port = get_host_port(&connect->addr);
1059 if (!port && check->port)
1060 port = check->port;
1061 if (!port && is_inet_addr(&check->addr))
1062 port = get_host_port(&check->addr);
1063 if (!port) {
1064 /* The server MUST exist here */
1065 port = s->svc_port;
1066 }
1067 set_host_port(conn->dst, port);
1068
1069 xprt = ((connect->options & TCPCHK_OPT_SSL)
1070 ? xprt_get(XPRT_SSL)
1071 : ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) ? check->xprt : xprt_get(XPRT_RAW)));
1072
1073 conn_prepare(conn, proto, xprt);
1074 cs_attach(cs, check, &check_conn_cb);
1075
Christopher Fauletf7177272020-10-02 13:41:55 +02001076 if ((connect->options & TCPCHK_OPT_SOCKS4) && s && (s->flags & SRV_F_SOCKS4_PROXY)) {
1077 conn->send_proxy_ofs = 1;
1078 conn->flags |= CO_FL_SOCKS4;
1079 }
1080 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.via_socks4 && (s->flags & SRV_F_SOCKS4_PROXY)) {
1081 conn->send_proxy_ofs = 1;
1082 conn->flags |= CO_FL_SOCKS4;
1083 }
1084
1085 if (connect->options & TCPCHK_OPT_SEND_PROXY) {
1086 conn->send_proxy_ofs = 1;
1087 conn->flags |= CO_FL_SEND_PROXY;
1088 }
1089 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.send_proxy && !(check->state & CHK_ST_AGENT)) {
1090 conn->send_proxy_ofs = 1;
1091 conn->flags |= CO_FL_SEND_PROXY;
1092 }
1093
Willy Tarreau51cd5952020-06-05 12:25:38 +02001094 status = SF_ERR_INTERNAL;
1095 next = get_next_tcpcheck_rule(check->tcpcheck_rules, rule);
1096 if (proto && proto->connect) {
1097 int flags = 0;
1098
1099 if (check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK)
1100 flags |= CONNECT_HAS_DATA;
1101 if (!next || next->action != TCPCHK_ACT_EXPECT)
1102 flags |= CONNECT_DELACK_ALWAYS;
1103 status = proto->connect(conn, flags);
1104 }
1105
1106 if (status != SF_ERR_NONE)
1107 goto fail_check;
1108
Christopher Faulet21ddc742020-07-01 15:26:14 +02001109 conn_set_private(conn);
Willy Tarreau51cd5952020-06-05 12:25:38 +02001110 conn->ctx = cs;
1111
Willy Tarreau51cd5952020-06-05 12:25:38 +02001112#ifdef USE_OPENSSL
1113 if (connect->sni)
1114 ssl_sock_set_servername(conn, connect->sni);
1115 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.sni)
1116 ssl_sock_set_servername(conn, s->check.sni);
1117
1118 if (connect->alpn)
1119 ssl_sock_set_alpn(conn, (unsigned char *)connect->alpn, connect->alpn_len);
1120 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && s && s->check.alpn_str)
1121 ssl_sock_set_alpn(conn, (unsigned char *)s->check.alpn_str, s->check.alpn_len);
1122#endif
Willy Tarreau51cd5952020-06-05 12:25:38 +02001123
1124 if (conn_ctrl_ready(conn) && (connect->options & TCPCHK_OPT_LINGER)) {
1125 /* Some servers don't like reset on close */
1126 fdtab[cs->conn->handle.fd].linger_risk = 0;
1127 }
1128
1129 if (conn_ctrl_ready(conn) && (conn->flags & (CO_FL_SEND_PROXY | CO_FL_SOCKS4))) {
1130 if (xprt_add_hs(conn) < 0)
1131 status = SF_ERR_RESOURCE;
1132 }
1133
Willy Tarreau8e979fa2020-07-31 08:49:31 +02001134 /* The mux may be initialized now if there isn't server attached to the
1135 * check (email alerts) or if there is a mux proto specified or if there
1136 * is no alpn.
1137 */
1138 if (!s || ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && check->mux_proto) ||
1139 connect->mux_proto || (!connect->alpn && !check->alpn_str)) {
1140 const struct mux_ops *mux_ops;
1141
1142 if (connect->mux_proto)
1143 mux_ops = connect->mux_proto->mux;
1144 else if ((connect->options & TCPCHK_OPT_DEFAULT_CONNECT) && check->mux_proto)
1145 mux_ops = check->mux_proto->mux;
1146 else {
1147 int mode = ((check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK
1148 ? PROTO_MODE_HTTP
1149 : PROTO_MODE_TCP);
1150
1151 mux_ops = conn_get_best_mux(conn, IST_NULL, PROTO_SIDE_BE, mode);
1152 }
1153 if (mux_ops && conn_install_mux(conn, mux_ops, cs, proxy, check->sess) < 0) {
1154 status = SF_ERR_INTERNAL;
1155 goto fail_check;
1156 }
1157 }
1158
Willy Tarreau51cd5952020-06-05 12:25:38 +02001159 fail_check:
1160 /* It can return one of :
1161 * - SF_ERR_NONE if everything's OK
1162 * - SF_ERR_SRVTO if there are no more servers
1163 * - SF_ERR_SRVCL if the connection was refused by the server
1164 * - SF_ERR_PRXCOND if the connection has been limited by the proxy (maxconn)
1165 * - SF_ERR_RESOURCE if a system resource is lacking (eg: fd limits, ports, ...)
1166 * - SF_ERR_INTERNAL for any other purely internal errors
1167 * Additionally, in the case of SF_ERR_RESOURCE, an emergency log will be emitted.
1168 * Note that we try to prevent the network stack from sending the ACK during the
1169 * connect() when a pure TCP check is used (without PROXY protocol).
1170 */
1171 switch (status) {
1172 case SF_ERR_NONE:
1173 /* we allow up to min(inter, timeout.connect) for a connection
1174 * to establish but only when timeout.check is set as it may be
1175 * to short for a full check otherwise
1176 */
1177 t->expire = tick_add(now_ms, MS_TO_TICKS(check->inter));
1178
1179 if (proxy->timeout.check && proxy->timeout.connect) {
1180 int t_con = tick_add(now_ms, proxy->timeout.connect);
1181 t->expire = tick_first(t->expire, t_con);
1182 }
1183 break;
1184 case SF_ERR_SRVTO: /* ETIMEDOUT */
1185 case SF_ERR_SRVCL: /* ECONNREFUSED, ENETUNREACH, ... */
1186 case SF_ERR_PRXCOND:
1187 case SF_ERR_RESOURCE:
1188 case SF_ERR_INTERNAL:
1189 chk_report_conn_err(check, errno, 0);
1190 ret = TCPCHK_EVAL_STOP;
1191 goto out;
1192 }
1193
1194 /* don't do anything until the connection is established */
1195 if (conn->flags & CO_FL_WAIT_XPRT) {
1196 if (conn->mux) {
1197 if (next && next->action == TCPCHK_ACT_SEND)
1198 conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
1199 else
1200 conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
1201 }
1202 ret = TCPCHK_EVAL_WAIT;
1203 goto out;
1204 }
1205
1206 out:
1207 if (conn && check->result == CHK_RES_FAILED)
1208 conn->flags |= CO_FL_ERROR;
1209 return ret;
1210}
1211
1212/* Evaluates a TCPCHK_ACT_SEND rule. Returns TCPCHK_EVAL_WAIT if outgoing data
1213 * were not fully sent, TCPCHK_EVAL_CONTINUE to evaluate the next rule or
1214 * TCPCHK_EVAL_STOP if an error occurred.
1215 */
1216enum tcpcheck_eval_ret tcpcheck_eval_send(struct check *check, struct tcpcheck_rule *rule)
1217{
1218 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1219 struct tcpcheck_send *send = &rule->send;
1220 struct conn_stream *cs = check->cs;
1221 struct connection *conn = cs_conn(cs);
1222 struct buffer *tmp = NULL;
1223 struct htx *htx = NULL;
1224
1225 /* reset the read & write buffer */
1226 b_reset(&check->bi);
1227 b_reset(&check->bo);
1228
1229 switch (send->type) {
1230 case TCPCHK_SEND_STRING:
1231 case TCPCHK_SEND_BINARY:
1232 if (istlen(send->data) >= b_size(&check->bo)) {
1233 chunk_printf(&trash, "tcp-check send : string too large (%u) for buffer size (%u) at step %d",
1234 (unsigned int)istlen(send->data), (unsigned int)b_size(&check->bo),
1235 tcpcheck_get_step_id(check, rule));
1236 set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
1237 ret = TCPCHK_EVAL_STOP;
1238 goto out;
1239 }
1240 b_putist(&check->bo, send->data);
1241 break;
1242 case TCPCHK_SEND_STRING_LF:
1243 check->bo.data = sess_build_logline(check->sess, NULL, b_orig(&check->bo), b_size(&check->bo), &rule->send.fmt);
1244 if (!b_data(&check->bo))
1245 goto out;
1246 break;
1247 case TCPCHK_SEND_BINARY_LF: {
1248 int len = b_size(&check->bo);
1249
1250 tmp = alloc_trash_chunk();
1251 if (!tmp)
1252 goto error_lf;
1253 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &rule->send.fmt);
1254 if (!b_data(tmp))
1255 goto out;
1256 tmp->area[tmp->data] = '\0';
1257 if (parse_binary(b_orig(tmp), &check->bo.area, &len, NULL) == 0)
1258 goto error_lf;
1259 check->bo.data = len;
1260 break;
1261 }
1262 case TCPCHK_SEND_HTTP: {
1263 struct htx_sl *sl;
1264 struct ist meth, uri, vsn, clen, body;
1265 unsigned int slflags = 0;
1266
1267 tmp = alloc_trash_chunk();
1268 if (!tmp)
1269 goto error_htx;
1270
1271 meth = ((send->http.meth.meth == HTTP_METH_OTHER)
1272 ? ist2(send->http.meth.str.area, send->http.meth.str.data)
1273 : http_known_methods[send->http.meth.meth]);
1274 if (send->http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) {
1275 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &send->http.uri_fmt);
1276 uri = (b_data(tmp) ? ist2(b_orig(tmp), b_data(tmp)) : ist("/"));
1277 }
1278 else
1279 uri = (isttest(send->http.uri) ? send->http.uri : ist("/"));
1280 vsn = (isttest(send->http.vsn) ? send->http.vsn : ist("HTTP/1.0"));
1281
1282 if ((istlen(vsn) == 6 && *(vsn.ptr+5) == '2') ||
1283 (istlen(vsn) == 8 && (*(vsn.ptr+5) > '1' || (*(vsn.ptr+5) == '1' && *(vsn.ptr+7) >= '1'))))
1284 slflags |= HTX_SL_F_VER_11;
1285 slflags |= (HTX_SL_F_XFER_LEN|HTX_SL_F_CLEN);
1286 if (!isttest(send->http.body))
1287 slflags |= HTX_SL_F_BODYLESS;
1288
1289 htx = htx_from_buf(&check->bo);
1290 sl = htx_add_stline(htx, HTX_BLK_REQ_SL, slflags, meth, uri, vsn);
1291 if (!sl)
1292 goto error_htx;
1293 sl->info.req.meth = send->http.meth.meth;
1294 if (!http_update_host(htx, sl, uri))
1295 goto error_htx;
1296
1297 if (!LIST_ISEMPTY(&send->http.hdrs)) {
1298 struct tcpcheck_http_hdr *hdr;
1299 struct ist hdr_value;
1300
1301 list_for_each_entry(hdr, &send->http.hdrs, list) {
1302 chunk_reset(tmp);
1303 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &hdr->value);
1304 if (!b_data(tmp))
1305 continue;
1306 hdr_value = ist2(b_orig(tmp), b_data(tmp));
1307 if (!htx_add_header(htx, hdr->name, hdr_value))
1308 goto error_htx;
1309 if ((sl->flags & HTX_SL_F_HAS_AUTHORITY) && isteqi(hdr->name, ist("host"))) {
1310 if (!http_update_authority(htx, sl, hdr_value))
1311 goto error_htx;
1312 }
1313 }
1314
1315 }
1316 if (check->proxy->options2 & PR_O2_CHK_SNDST) {
1317 chunk_reset(tmp);
1318 httpchk_build_status_header(check->server, tmp);
1319 if (!htx_add_header(htx, ist("X-Haproxy-Server-State"), ist2(b_orig(tmp), b_data(tmp))))
1320 goto error_htx;
1321 }
1322
1323
1324 if (send->http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) {
1325 chunk_reset(tmp);
1326 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &send->http.body_fmt);
1327 body = ist2(b_orig(tmp), b_data(tmp));
1328 }
1329 else
1330 body = send->http.body;
1331 clen = ist((!istlen(body) ? "0" : ultoa(istlen(body))));
1332
1333 if (!htx_add_header(htx, ist("Connection"), ist("close")) ||
1334 !htx_add_header(htx, ist("Content-length"), clen))
1335 goto error_htx;
1336
1337
1338 if (!htx_add_endof(htx, HTX_BLK_EOH) ||
Christopher Faulet810df062020-07-22 16:20:34 +02001339 (istlen(body) && !htx_add_data_atonce(htx, body)))
1340 goto error_htx;
1341
1342 htx->flags |= HTX_FL_EOI; /* no more data are expected. Only EOM remains to add now */
1343 if (!htx_add_endof(htx, HTX_BLK_EOM))
Willy Tarreau51cd5952020-06-05 12:25:38 +02001344 goto error_htx;
1345
1346 htx_to_buf(htx, &check->bo);
1347 break;
1348 }
1349 case TCPCHK_SEND_UNDEF:
1350 /* Should never happen. */
1351 ret = TCPCHK_EVAL_STOP;
1352 goto out;
1353 };
1354
1355
1356 if (conn->mux->snd_buf(cs, &check->bo,
1357 (IS_HTX_CONN(conn) ? (htxbuf(&check->bo))->data: b_data(&check->bo)), 0) <= 0) {
1358 if ((conn->flags & CO_FL_ERROR) || (cs->flags & CS_FL_ERROR)) {
1359 ret = TCPCHK_EVAL_STOP;
1360 goto out;
1361 }
1362 }
1363 if ((IS_HTX_CONN(conn) && !htx_is_empty(htxbuf(&check->bo))) || b_data(&check->bo)) {
1364 cs->conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
1365 ret = TCPCHK_EVAL_WAIT;
1366 goto out;
1367 }
1368
1369 out:
1370 free_trash_chunk(tmp);
1371 return ret;
1372
1373 error_htx:
1374 if (htx) {
1375 htx_reset(htx);
1376 htx_to_buf(htx, &check->bo);
1377 }
1378 chunk_printf(&trash, "tcp-check send : failed to build HTTP request at step %d",
1379 tcpcheck_get_step_id(check, rule));
1380 set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
1381 ret = TCPCHK_EVAL_STOP;
1382 goto out;
1383
1384 error_lf:
1385 chunk_printf(&trash, "tcp-check send : failed to build log-format string at step %d",
1386 tcpcheck_get_step_id(check, rule));
1387 set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
1388 ret = TCPCHK_EVAL_STOP;
1389 goto out;
1390
1391}
1392
1393/* Try to receive data before evaluating a tcp-check expect rule. Returns
1394 * TCPCHK_EVAL_WAIT if it is already subscribed on receive events or if nothing
1395 * was received, TCPCHK_EVAL_CONTINUE to evaluate the expect rule or
1396 * TCPCHK_EVAL_STOP if an error occurred.
1397 */
1398enum tcpcheck_eval_ret tcpcheck_eval_recv(struct check *check, struct tcpcheck_rule *rule)
1399{
1400 struct conn_stream *cs = check->cs;
1401 struct connection *conn = cs_conn(cs);
1402 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1403 size_t max, read, cur_read = 0;
1404 int is_empty;
1405 int read_poll = MAX_READ_POLL_LOOPS;
1406
1407 if (check->wait_list.events & SUB_RETRY_RECV)
1408 goto wait_more_data;
1409
1410 if (cs->flags & CS_FL_EOS)
1411 goto end_recv;
1412
1413 /* errors on the connection and the conn-stream were already checked */
1414
1415 /* prepare to detect if the mux needs more room */
1416 cs->flags &= ~CS_FL_WANT_ROOM;
1417
1418 while ((cs->flags & CS_FL_RCV_MORE) ||
1419 (!(conn->flags & CO_FL_ERROR) && !(cs->flags & (CS_FL_ERROR|CS_FL_EOS)))) {
1420 max = (IS_HTX_CS(cs) ? htx_free_space(htxbuf(&check->bi)) : b_room(&check->bi));
1421 read = conn->mux->rcv_buf(cs, &check->bi, max, 0);
1422 cur_read += read;
1423 if (!read ||
1424 (cs->flags & CS_FL_WANT_ROOM) ||
1425 (--read_poll <= 0) ||
1426 (read < max && read >= global.tune.recv_enough))
1427 break;
1428 }
1429
1430 end_recv:
1431 is_empty = (IS_HTX_CS(cs) ? htx_is_empty(htxbuf(&check->bi)) : !b_data(&check->bi));
1432 if (is_empty && ((conn->flags & CO_FL_ERROR) || (cs->flags & CS_FL_ERROR))) {
1433 /* Report network errors only if we got no other data. Otherwise
1434 * we'll let the upper layers decide whether the response is OK
1435 * or not. It is very common that an RST sent by the server is
1436 * reported as an error just after the last data chunk.
1437 */
1438 goto stop;
1439 }
1440 if (!cur_read) {
1441 if (!(cs->flags & (CS_FL_WANT_ROOM|CS_FL_ERROR|CS_FL_EOS))) {
1442 conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
1443 goto wait_more_data;
1444 }
1445 if (is_empty) {
1446 int status;
1447
1448 chunk_printf(&trash, "TCPCHK got an empty response at step %d",
1449 tcpcheck_get_step_id(check, rule));
1450 if (rule->comment)
1451 chunk_appendf(&trash, " comment: '%s'", rule->comment);
1452
1453 status = ((rule->expect.err_status != HCHK_STATUS_UNKNOWN) ? rule->expect.err_status : HCHK_STATUS_L7RSP);
1454 set_server_check_status(check, status, trash.area);
1455 goto stop;
1456 }
1457 }
1458
1459 out:
1460 return ret;
1461
1462 stop:
1463 ret = TCPCHK_EVAL_STOP;
1464 goto out;
1465
1466 wait_more_data:
1467 ret = TCPCHK_EVAL_WAIT;
1468 goto out;
1469}
1470
1471/* Evaluates an HTTP TCPCHK_ACT_EXPECT rule. If <last_read> is set , no more data
1472 * are expected. Returns TCPCHK_EVAL_WAIT to wait for more data,
1473 * TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP if an
1474 * error occurred.
1475 */
1476enum tcpcheck_eval_ret tcpcheck_eval_expect_http(struct check *check, struct tcpcheck_rule *rule, int last_read)
1477{
1478 struct htx *htx = htxbuf(&check->bi);
1479 struct htx_sl *sl;
1480 struct htx_blk *blk;
1481 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1482 struct tcpcheck_expect *expect = &rule->expect;
1483 struct buffer *msg = NULL, *tmp = NULL, *nbuf = NULL, *vbuf = NULL;
1484 enum healthcheck_status status = HCHK_STATUS_L7RSP;
1485 struct ist desc = IST_NULL;
1486 int i, match, inverse;
1487
1488 last_read |= (!htx_free_space(htx) || (htx_get_tail_type(htx) == HTX_BLK_EOM));
1489
1490 if (htx->flags & HTX_FL_PARSING_ERROR) {
1491 status = HCHK_STATUS_L7RSP;
1492 goto error;
1493 }
1494
1495 if (htx_is_empty(htx)) {
1496 if (last_read) {
1497 status = HCHK_STATUS_L7RSP;
1498 goto error;
1499 }
1500 goto wait_more_data;
1501 }
1502
1503 sl = http_get_stline(htx);
1504 check->code = sl->info.res.status;
1505
1506 if (check->server &&
1507 (check->server->proxy->options & PR_O_DISABLE404) &&
1508 (check->server->next_state != SRV_ST_STOPPED) &&
1509 (check->code == 404)) {
1510 /* 404 may be accepted as "stopping" only if the server was up */
1511 goto out;
1512 }
1513
1514 inverse = !!(expect->flags & TCPCHK_EXPT_FL_INV);
1515 /* Make GCC happy ; initialize match to a failure state. */
1516 match = inverse;
1517 status = expect->err_status;
1518
1519 switch (expect->type) {
1520 case TCPCHK_EXPECT_HTTP_STATUS:
1521 match = 0;
1522 for (i = 0; i < expect->codes.num; i++) {
1523 if (sl->info.res.status >= expect->codes.codes[i][0] &&
1524 sl->info.res.status <= expect->codes.codes[i][1]) {
1525 match = 1;
1526 break;
1527 }
1528 }
1529
1530 /* Set status and description in case of error */
1531 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7STS);
1532 if (LIST_ISEMPTY(&expect->onerror_fmt))
1533 desc = htx_sl_res_reason(sl);
1534 break;
1535 case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
1536 match = regex_exec2(expect->regex, HTX_SL_RES_CPTR(sl), HTX_SL_RES_CLEN(sl));
1537
1538 /* Set status and description in case of error */
1539 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7STS);
1540 if (LIST_ISEMPTY(&expect->onerror_fmt))
1541 desc = htx_sl_res_reason(sl);
1542 break;
1543
1544 case TCPCHK_EXPECT_HTTP_HEADER: {
1545 struct http_hdr_ctx ctx;
1546 struct ist npat, vpat, value;
1547 int full = (expect->flags & (TCPCHK_EXPT_FL_HTTP_HVAL_NONE|TCPCHK_EXPT_FL_HTTP_HVAL_FULL));
1548
1549 if (expect->flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT) {
1550 nbuf = alloc_trash_chunk();
1551 if (!nbuf) {
1552 status = HCHK_STATUS_L7RSP;
1553 desc = ist("Failed to allocate buffer to eval log-format string");
1554 goto error;
1555 }
1556 nbuf->data = sess_build_logline(check->sess, NULL, b_orig(nbuf), b_size(nbuf), &expect->hdr.name_fmt);
1557 if (!b_data(nbuf)) {
1558 status = HCHK_STATUS_L7RSP;
1559 desc = ist("log-format string evaluated to an empty string");
1560 goto error;
1561 }
1562 npat = ist2(b_orig(nbuf), b_data(nbuf));
1563 }
1564 else if (!(expect->flags & TCPCHK_EXPT_FL_HTTP_HNAME_REG))
1565 npat = expect->hdr.name;
1566
1567 if (expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT) {
1568 vbuf = alloc_trash_chunk();
1569 if (!vbuf) {
1570 status = HCHK_STATUS_L7RSP;
1571 desc = ist("Failed to allocate buffer to eval log-format string");
1572 goto error;
1573 }
1574 vbuf->data = sess_build_logline(check->sess, NULL, b_orig(vbuf), b_size(vbuf), &expect->hdr.value_fmt);
1575 if (!b_data(vbuf)) {
1576 status = HCHK_STATUS_L7RSP;
1577 desc = ist("log-format string evaluated to an empty string");
1578 goto error;
1579 }
1580 vpat = ist2(b_orig(vbuf), b_data(vbuf));
1581 }
1582 else if (!(expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_REG))
1583 vpat = expect->hdr.value;
1584
1585 match = 0;
1586 ctx.blk = NULL;
1587 while (1) {
1588 switch (expect->flags & TCPCHK_EXPT_FL_HTTP_HNAME_TYPE) {
1589 case TCPCHK_EXPT_FL_HTTP_HNAME_STR:
1590 if (!http_find_str_header(htx, npat, &ctx, full))
1591 goto end_of_match;
1592 break;
1593 case TCPCHK_EXPT_FL_HTTP_HNAME_BEG:
1594 if (!http_find_pfx_header(htx, npat, &ctx, full))
1595 goto end_of_match;
1596 break;
1597 case TCPCHK_EXPT_FL_HTTP_HNAME_END:
1598 if (!http_find_sfx_header(htx, npat, &ctx, full))
1599 goto end_of_match;
1600 break;
1601 case TCPCHK_EXPT_FL_HTTP_HNAME_SUB:
1602 if (!http_find_sub_header(htx, npat, &ctx, full))
1603 goto end_of_match;
1604 break;
1605 case TCPCHK_EXPT_FL_HTTP_HNAME_REG:
1606 if (!http_match_header(htx, expect->hdr.name_re, &ctx, full))
1607 goto end_of_match;
1608 break;
1609 default:
1610 /* should never happen */
1611 goto end_of_match;
1612 }
1613
1614 /* A header has matched the name pattern, let's test its
1615 * value now (always defined from there). If there is no
1616 * value pattern, it is a good match.
1617 */
1618
1619 if (expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_NONE) {
1620 match = 1;
1621 goto end_of_match;
1622 }
1623
1624 value = ctx.value;
1625 switch (expect->flags & TCPCHK_EXPT_FL_HTTP_HVAL_TYPE) {
1626 case TCPCHK_EXPT_FL_HTTP_HVAL_STR:
1627 if (isteq(value, vpat)) {
1628 match = 1;
1629 goto end_of_match;
1630 }
1631 break;
1632 case TCPCHK_EXPT_FL_HTTP_HVAL_BEG:
1633 if (istlen(value) < istlen(vpat))
1634 break;
1635 value = ist2(istptr(value), istlen(vpat));
1636 if (isteq(value, vpat)) {
1637 match = 1;
1638 goto end_of_match;
1639 }
1640 break;
1641 case TCPCHK_EXPT_FL_HTTP_HVAL_END:
1642 if (istlen(value) < istlen(vpat))
1643 break;
1644 value = ist2(istptr(value) + istlen(value) - istlen(vpat), istlen(vpat));
1645 if (isteq(value, vpat)) {
1646 match = 1;
1647 goto end_of_match;
1648 }
1649 break;
1650 case TCPCHK_EXPT_FL_HTTP_HVAL_SUB:
1651 if (isttest(istist(value, vpat))) {
1652 match = 1;
1653 goto end_of_match;
1654 }
1655 break;
1656 case TCPCHK_EXPT_FL_HTTP_HVAL_REG:
1657 if (regex_exec2(expect->hdr.value_re, istptr(value), istlen(value))) {
1658 match = 1;
1659 goto end_of_match;
1660 }
1661 break;
1662 }
1663 }
1664
1665 end_of_match:
1666 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7STS);
1667 if (LIST_ISEMPTY(&expect->onerror_fmt))
1668 desc = htx_sl_res_reason(sl);
1669 break;
1670 }
1671
1672 case TCPCHK_EXPECT_HTTP_BODY:
1673 case TCPCHK_EXPECT_HTTP_BODY_REGEX:
1674 case TCPCHK_EXPECT_HTTP_BODY_LF:
1675 match = 0;
1676 chunk_reset(&trash);
1677 for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
1678 enum htx_blk_type type = htx_get_blk_type(blk);
1679
1680 if (type == HTX_BLK_EOM || type == HTX_BLK_TLR || type == HTX_BLK_EOT)
1681 break;
1682 if (type == HTX_BLK_DATA) {
1683 if (!chunk_istcat(&trash, htx_get_blk_value(htx, blk)))
1684 break;
1685 }
1686 }
1687
1688 if (!b_data(&trash)) {
1689 if (!last_read)
1690 goto wait_more_data;
1691 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7RSP);
1692 if (LIST_ISEMPTY(&expect->onerror_fmt))
1693 desc = ist("HTTP content check could not find a response body");
1694 goto error;
1695 }
1696
1697 if (expect->type == TCPCHK_EXPECT_HTTP_BODY_LF) {
1698 tmp = alloc_trash_chunk();
1699 if (!tmp) {
1700 status = HCHK_STATUS_L7RSP;
1701 desc = ist("Failed to allocate buffer to eval log-format string");
1702 goto error;
1703 }
1704 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &expect->fmt);
1705 if (!b_data(tmp)) {
1706 status = HCHK_STATUS_L7RSP;
1707 desc = ist("log-format string evaluated to an empty string");
1708 goto error;
1709 }
1710 }
1711
1712 if (!last_read &&
1713 ((expect->type == TCPCHK_EXPECT_HTTP_BODY && b_data(&trash) < istlen(expect->data)) ||
1714 ((expect->type == TCPCHK_EXPECT_HTTP_BODY_LF && b_data(&trash) < b_data(tmp))) ||
1715 (expect->min_recv > 0 && b_data(&trash) < expect->min_recv))) {
1716 ret = TCPCHK_EVAL_WAIT;
1717 goto out;
1718 }
1719
1720 if (expect->type ==TCPCHK_EXPECT_HTTP_BODY)
1721 match = my_memmem(b_orig(&trash), b_data(&trash), istptr(expect->data), istlen(expect->data)) != NULL;
1722 else if (expect->type ==TCPCHK_EXPECT_HTTP_BODY_LF)
1723 match = my_memmem(b_orig(&trash), b_data(&trash), b_orig(tmp), b_data(tmp)) != NULL;
1724 else
1725 match = regex_exec2(expect->regex, b_orig(&trash), b_data(&trash));
1726
1727 /* Set status and description in case of error */
1728 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7RSP);
1729 if (LIST_ISEMPTY(&expect->onerror_fmt))
1730 desc = (inverse
1731 ? ist("HTTP check matched unwanted content")
1732 : ist("HTTP content check did not match"));
1733 break;
1734
1735
1736 default:
1737 /* should never happen */
1738 status = ((status != HCHK_STATUS_UNKNOWN) ? status : HCHK_STATUS_L7RSP);
1739 goto error;
1740 }
1741
1742 /* Wait for more data on mismatch only if no minimum is defined (-1),
1743 * otherwise the absence of match is already conclusive.
1744 */
1745 if (!match && !last_read && (expect->min_recv == -1)) {
1746 ret = TCPCHK_EVAL_WAIT;
1747 goto out;
1748 }
1749
1750 if (!(match ^ inverse))
1751 goto error;
1752
1753 out:
1754 free_trash_chunk(tmp);
1755 free_trash_chunk(nbuf);
1756 free_trash_chunk(vbuf);
1757 free_trash_chunk(msg);
1758 return ret;
1759
1760 error:
1761 ret = TCPCHK_EVAL_STOP;
1762 msg = alloc_trash_chunk();
1763 if (msg)
1764 tcpcheck_expect_onerror_message(msg, check, rule, 0, desc);
1765 set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
1766 goto out;
1767
1768 wait_more_data:
1769 ret = TCPCHK_EVAL_WAIT;
1770 goto out;
1771}
1772
1773/* Evaluates a TCP TCPCHK_ACT_EXPECT rule. Returns TCPCHK_EVAL_WAIT to wait for
1774 * more data, TCPCHK_EVAL_CONTINUE to evaluate the next rule or TCPCHK_EVAL_STOP
1775 * if an error occurred.
1776 */
1777enum tcpcheck_eval_ret tcpcheck_eval_expect(struct check *check, struct tcpcheck_rule *rule, int last_read)
1778{
1779 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1780 struct tcpcheck_expect *expect = &rule->expect;
1781 struct buffer *msg = NULL, *tmp = NULL;
1782 struct ist desc = IST_NULL;
1783 enum healthcheck_status status;
1784 int match, inverse;
1785
1786 last_read |= b_full(&check->bi);
1787
1788 /* The current expect might need more data than the previous one, check again
1789 * that the minimum amount data required to match is respected.
1790 */
1791 if (!last_read) {
1792 if ((expect->type == TCPCHK_EXPECT_STRING || expect->type == TCPCHK_EXPECT_BINARY) &&
1793 (b_data(&check->bi) < istlen(expect->data))) {
1794 ret = TCPCHK_EVAL_WAIT;
1795 goto out;
1796 }
1797 if (expect->min_recv > 0 && (b_data(&check->bi) < expect->min_recv)) {
1798 ret = TCPCHK_EVAL_WAIT;
1799 goto out;
1800 }
1801 }
1802
1803 inverse = !!(expect->flags & TCPCHK_EXPT_FL_INV);
1804 /* Make GCC happy ; initialize match to a failure state. */
1805 match = inverse;
1806 status = ((expect->err_status != HCHK_STATUS_UNKNOWN) ? expect->err_status : HCHK_STATUS_L7RSP);
1807
1808 switch (expect->type) {
1809 case TCPCHK_EXPECT_STRING:
1810 case TCPCHK_EXPECT_BINARY:
1811 match = my_memmem(b_head(&check->bi), b_data(&check->bi), istptr(expect->data), istlen(expect->data)) != NULL;
1812 break;
1813 case TCPCHK_EXPECT_STRING_REGEX:
1814 match = regex_exec2(expect->regex, b_head(&check->bi), MIN(b_data(&check->bi), b_size(&check->bi)-1));
1815 break;
1816
1817 case TCPCHK_EXPECT_BINARY_REGEX:
1818 chunk_reset(&trash);
1819 dump_binary(&trash, b_head(&check->bi), b_data(&check->bi));
1820 match = regex_exec2(expect->regex, b_head(&trash), MIN(b_data(&trash), b_size(&trash)-1));
1821 break;
1822
1823 case TCPCHK_EXPECT_STRING_LF:
1824 case TCPCHK_EXPECT_BINARY_LF:
1825 match = 0;
1826 tmp = alloc_trash_chunk();
1827 if (!tmp) {
1828 status = HCHK_STATUS_L7RSP;
1829 desc = ist("Failed to allocate buffer to eval format string");
1830 goto error;
1831 }
1832 tmp->data = sess_build_logline(check->sess, NULL, b_orig(tmp), b_size(tmp), &expect->fmt);
1833 if (!b_data(tmp)) {
1834 status = HCHK_STATUS_L7RSP;
1835 desc = ist("log-format string evaluated to an empty string");
1836 goto error;
1837 }
1838 if (expect->type == TCPCHK_EXPECT_BINARY_LF) {
1839 int len = tmp->data;
1840 if (parse_binary(b_orig(tmp), &tmp->area, &len, NULL) == 0) {
1841 status = HCHK_STATUS_L7RSP;
1842 desc = ist("Failed to parse hexastring resulting of eval of a log-format string");
1843 goto error;
1844 }
1845 tmp->data = len;
1846 }
1847 if (b_data(&check->bi) < tmp->data) {
1848 if (!last_read) {
1849 ret = TCPCHK_EVAL_WAIT;
1850 goto out;
1851 }
1852 break;
1853 }
1854 match = my_memmem(b_head(&check->bi), b_data(&check->bi), b_orig(tmp), b_data(tmp)) != NULL;
1855 break;
1856
1857 case TCPCHK_EXPECT_CUSTOM:
1858 if (expect->custom)
1859 ret = expect->custom(check, rule, last_read);
1860 goto out;
1861 default:
1862 /* Should never happen. */
1863 ret = TCPCHK_EVAL_STOP;
1864 goto out;
1865 }
1866
1867
1868 /* Wait for more data on mismatch only if no minimum is defined (-1),
1869 * otherwise the absence of match is already conclusive.
1870 */
1871 if (!match && !last_read && (expect->min_recv == -1)) {
1872 ret = TCPCHK_EVAL_WAIT;
1873 goto out;
1874 }
1875
1876 /* Result as expected, next rule. */
1877 if (match ^ inverse)
1878 goto out;
1879
1880 error:
1881 /* From this point on, we matched something we did not want, this is an error state. */
1882 ret = TCPCHK_EVAL_STOP;
1883 msg = alloc_trash_chunk();
1884 if (msg)
1885 tcpcheck_expect_onerror_message(msg, check, rule, match, desc);
1886 set_server_check_status(check, status, (msg ? b_head(msg) : NULL));
1887 free_trash_chunk(msg);
1888
1889 out:
1890 free_trash_chunk(tmp);
1891 return ret;
1892}
1893
1894/* Evaluates a TCPCHK_ACT_ACTION_KW rule. Returns TCPCHK_EVAL_CONTINUE to
1895 * evaluate the next rule or TCPCHK_EVAL_STOP if an error occurred. It never
1896 * waits.
1897 */
1898enum tcpcheck_eval_ret tcpcheck_eval_action_kw(struct check *check, struct tcpcheck_rule *rule)
1899{
1900 enum tcpcheck_eval_ret ret = TCPCHK_EVAL_CONTINUE;
1901 struct act_rule *act_rule;
1902 enum act_return act_ret;
1903
1904 act_rule =rule->action_kw.rule;
1905 act_ret = act_rule->action_ptr(act_rule, check->proxy, check->sess, NULL, 0);
1906 if (act_ret != ACT_RET_CONT) {
1907 chunk_printf(&trash, "TCPCHK ACTION unexpected result at step %d\n",
1908 tcpcheck_get_step_id(check, rule));
1909 set_server_check_status(check, HCHK_STATUS_L7RSP, trash.area);
1910 ret = TCPCHK_EVAL_STOP;
1911 }
1912
1913 return ret;
1914}
1915
1916/* Executes a tcp-check ruleset. Note that this is called both from the
1917 * connection's wake() callback and from the check scheduling task. It returns
1918 * 0 on normal cases, or <0 if a close() has happened on an existing connection,
1919 * presenting the risk of an fd replacement.
1920 *
1921 * Please do NOT place any return statement in this function and only leave
1922 * via the out_end_tcpcheck label after setting retcode.
1923 */
1924int tcpcheck_main(struct check *check)
1925{
1926 struct tcpcheck_rule *rule;
1927 struct conn_stream *cs = check->cs;
1928 struct connection *conn = cs_conn(cs);
1929 int must_read = 1, last_read = 0;
1930 int ret, retcode = 0;
1931 enum tcpcheck_eval_ret eval_ret;
1932
1933 /* here, we know that the check is complete or that it failed */
1934 if (check->result != CHK_RES_UNKNOWN)
1935 goto out;
1936
1937 /* Note: the conn-stream and the connection may only be undefined before
1938 * the first rule evaluation (it is always a connect rule) or when the
1939 * conn-stream allocation failed on the first connect.
1940 */
1941
1942 /* 1- check for connection error, if any */
1943 if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR))
1944 goto out_end_tcpcheck;
1945
1946 /* 2- check if we are waiting for the connection establishment. It only
1947 * happens during TCPCHK_ACT_CONNECT. */
1948 if (check->current_step && check->current_step->action == TCPCHK_ACT_CONNECT) {
1949 if (conn->flags & CO_FL_WAIT_XPRT) {
1950 struct tcpcheck_rule *next;
1951
1952 next = get_next_tcpcheck_rule(check->tcpcheck_rules, check->current_step);
1953 if (next && next->action == TCPCHK_ACT_SEND) {
1954 if (!(check->wait_list.events & SUB_RETRY_SEND))
1955 conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
1956 goto out;
1957 }
1958 else {
1959 eval_ret = tcpcheck_eval_recv(check, check->current_step);
1960 if (eval_ret == TCPCHK_EVAL_STOP)
1961 goto out_end_tcpcheck;
1962 else if (eval_ret == TCPCHK_EVAL_WAIT)
1963 goto out;
1964 last_read = ((conn->flags & CO_FL_ERROR) || (cs->flags & (CS_FL_ERROR|CS_FL_EOS)));
1965 must_read = 0;
1966 }
1967 }
1968 rule = LIST_NEXT(&check->current_step->list, typeof(rule), list);
1969 }
1970
1971 /* 3- check for pending outgoing data. It only happens during
1972 * TCPCHK_ACT_SEND. */
1973 else if (check->current_step && check->current_step->action == TCPCHK_ACT_SEND) {
1974 if (b_data(&check->bo)) {
1975 /* We're already waiting to be able to send, give up */
1976 if (check->wait_list.events & SUB_RETRY_SEND)
1977 goto out;
1978
1979 ret = conn->mux->snd_buf(cs, &check->bo,
1980 (IS_HTX_CONN(conn) ? (htxbuf(&check->bo))->data: b_data(&check->bo)), 0);
1981 if (ret <= 0) {
1982 if ((conn->flags & CO_FL_ERROR) || (cs->flags & CS_FL_ERROR))
1983 goto out_end_tcpcheck;
1984 }
1985 if ((IS_HTX_CONN(conn) && !htx_is_empty(htxbuf(&check->bo))) || b_data(&check->bo)) {
1986 conn->mux->subscribe(cs, SUB_RETRY_SEND, &check->wait_list);
1987 goto out;
1988 }
1989 }
1990 rule = LIST_NEXT(&check->current_step->list, typeof(rule), list);
1991 }
1992
1993 /* 4- check if a rule must be resume. It happens if check->current_step
1994 * is defined. */
1995 else if (check->current_step)
1996 rule = check->current_step;
1997
1998 /* 5- It is the first evaluation. We must create a session and preset
1999 * tcp-check variables */
2000 else {
2001 struct tcpcheck_var *var;
2002
2003 /* First evaluation, create a session */
2004 check->sess = session_new(&checks_fe, NULL, &check->obj_type);
2005 if (!check->sess) {
2006 chunk_printf(&trash, "TCPCHK error allocating check session");
2007 set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area);
2008 goto out_end_tcpcheck;
2009 }
2010 vars_init(&check->vars, SCOPE_CHECK);
2011 rule = LIST_NEXT(check->tcpcheck_rules->list, typeof(rule), list);
2012
2013 /* Preset tcp-check variables */
2014 list_for_each_entry(var, &check->tcpcheck_rules->preset_vars, list) {
2015 struct sample smp;
2016
2017 memset(&smp, 0, sizeof(smp));
2018 smp_set_owner(&smp, check->proxy, check->sess, NULL, SMP_OPT_FINAL);
2019 smp.data = var->data;
2020 vars_set_by_name_ifexist(istptr(var->name), istlen(var->name), &smp);
2021 }
2022 }
2023
2024 /* Now evaluate the tcp-check rules */
2025
2026 list_for_each_entry_from(rule, check->tcpcheck_rules->list, list) {
2027 check->code = 0;
2028 switch (rule->action) {
2029 case TCPCHK_ACT_CONNECT:
2030 check->current_step = rule;
2031
2032 /* close but not release yet previous connection */
2033 if (check->cs) {
2034 cs_close(check->cs);
2035 retcode = -1; /* do not reuse the fd in the caller! */
2036 }
2037 eval_ret = tcpcheck_eval_connect(check, rule);
2038
2039 /* Refresh conn-stream and connection */
2040 cs = check->cs;
2041 conn = cs_conn(cs);
2042 must_read = 1; last_read = 0;
2043 break;
2044 case TCPCHK_ACT_SEND:
2045 check->current_step = rule;
2046 eval_ret = tcpcheck_eval_send(check, rule);
2047 must_read = 1;
2048 break;
2049 case TCPCHK_ACT_EXPECT:
2050 check->current_step = rule;
2051 if (must_read) {
2052 if (check->proxy->timeout.check)
2053 check->task->expire = tick_add_ifset(now_ms, check->proxy->timeout.check);
2054
2055 eval_ret = tcpcheck_eval_recv(check, rule);
2056 if (eval_ret == TCPCHK_EVAL_STOP)
2057 goto out_end_tcpcheck;
2058 else if (eval_ret == TCPCHK_EVAL_WAIT)
2059 goto out;
2060 last_read = ((conn->flags & CO_FL_ERROR) || (cs->flags & (CS_FL_ERROR|CS_FL_EOS)));
2061 must_read = 0;
2062 }
2063
2064 eval_ret = ((check->tcpcheck_rules->flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK
2065 ? tcpcheck_eval_expect_http(check, rule, last_read)
2066 : tcpcheck_eval_expect(check, rule, last_read));
2067
2068 if (eval_ret == TCPCHK_EVAL_WAIT) {
2069 check->current_step = rule->expect.head;
2070 if (!(check->wait_list.events & SUB_RETRY_RECV))
2071 conn->mux->subscribe(cs, SUB_RETRY_RECV, &check->wait_list);
2072 }
2073 break;
2074 case TCPCHK_ACT_ACTION_KW:
2075 /* Don't update the current step */
2076 eval_ret = tcpcheck_eval_action_kw(check, rule);
2077 break;
2078 default:
2079 /* Otherwise, just go to the next one and don't update
2080 * the current step
2081 */
2082 eval_ret = TCPCHK_EVAL_CONTINUE;
2083 break;
2084 }
2085
2086 switch (eval_ret) {
2087 case TCPCHK_EVAL_CONTINUE:
2088 break;
2089 case TCPCHK_EVAL_WAIT:
2090 goto out;
2091 case TCPCHK_EVAL_STOP:
2092 goto out_end_tcpcheck;
2093 }
2094 }
2095
2096 /* All rules was evaluated */
2097 if (check->current_step) {
2098 rule = check->current_step;
2099
2100 if (rule->action == TCPCHK_ACT_EXPECT) {
2101 struct buffer *msg;
2102 enum healthcheck_status status;
2103
2104 if (check->server &&
2105 (check->server->proxy->options & PR_O_DISABLE404) &&
2106 (check->server->next_state != SRV_ST_STOPPED) &&
2107 (check->code == 404)) {
2108 set_server_check_status(check, HCHK_STATUS_L7OKCD, NULL);
2109 goto out_end_tcpcheck;
2110 }
2111
2112 msg = alloc_trash_chunk();
2113 if (msg)
2114 tcpcheck_expect_onsuccess_message(msg, check, rule, IST_NULL);
2115 status = ((rule->expect.ok_status != HCHK_STATUS_UNKNOWN) ? rule->expect.ok_status : HCHK_STATUS_L7OKD);
2116 set_server_check_status(check, status, (msg ? b_head(msg) : "(tcp-check)"));
2117 free_trash_chunk(msg);
2118 }
2119 else if (rule->action == TCPCHK_ACT_CONNECT) {
2120 const char *msg = ((rule->connect.options & TCPCHK_OPT_IMPLICIT) ? NULL : "(tcp-check)");
2121 enum healthcheck_status status = HCHK_STATUS_L4OK;
2122#ifdef USE_OPENSSL
2123 if (ssl_sock_is_ssl(conn))
2124 status = HCHK_STATUS_L6OK;
2125#endif
2126 set_server_check_status(check, status, msg);
2127 }
2128 }
2129 else
2130 set_server_check_status(check, HCHK_STATUS_L7OKD, "(tcp-check)");
2131
2132 out_end_tcpcheck:
2133 if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR))
2134 chk_report_conn_err(check, errno, 0);
2135
2136 out:
2137 return retcode;
2138}
2139
2140
2141/**************************************************************************/
2142/******************* Internals to parse tcp-check rules *******************/
2143/**************************************************************************/
2144struct action_kw_list tcp_check_keywords = {
2145 .list = LIST_HEAD_INIT(tcp_check_keywords.list),
2146};
2147
2148/* Creates a tcp-check rule resulting from parsing a custom keyword. NULL is
2149 * returned on error.
2150 */
2151struct tcpcheck_rule *parse_tcpcheck_action(char **args, int cur_arg, struct proxy *px,
2152 struct list *rules, struct action_kw *kw,
2153 const char *file, int line, char **errmsg)
2154{
2155 struct tcpcheck_rule *chk = NULL;
2156 struct act_rule *actrule = NULL;
2157
2158 actrule = calloc(1, sizeof(*actrule));
2159 if (!actrule) {
2160 memprintf(errmsg, "out of memory");
2161 goto error;
2162 }
2163 actrule->kw = kw;
2164 actrule->from = ACT_F_TCP_CHK;
2165
2166 cur_arg++;
2167 if (kw->parse((const char **)args, &cur_arg, px, actrule, errmsg) == ACT_RET_PRS_ERR) {
2168 memprintf(errmsg, "'%s' : %s", kw->kw, *errmsg);
2169 goto error;
2170 }
2171
2172 chk = calloc(1, sizeof(*chk));
2173 if (!chk) {
2174 memprintf(errmsg, "out of memory");
2175 goto error;
2176 }
2177 chk->action = TCPCHK_ACT_ACTION_KW;
2178 chk->action_kw.rule = actrule;
2179 return chk;
2180
2181 error:
2182 free(actrule);
2183 return NULL;
2184}
2185
2186/* Parses and creates a tcp-check connect or an http-check connect rule. NULL is
2187 * returned on error.
2188 */
2189struct tcpcheck_rule *parse_tcpcheck_connect(char **args, int cur_arg, struct proxy *px, struct list *rules,
2190 const char *file, int line, char **errmsg)
2191{
2192 struct tcpcheck_rule *chk = NULL;
2193 struct sockaddr_storage *sk = NULL;
2194 char *comment = NULL, *sni = NULL, *alpn = NULL;
2195 struct sample_expr *port_expr = NULL;
2196 const struct mux_proto_list *mux_proto = NULL;
2197 unsigned short conn_opts = 0;
2198 long port = 0;
2199 int alpn_len = 0;
2200
2201 list_for_each_entry(chk, rules, list) {
2202 if (chk->action == TCPCHK_ACT_CONNECT)
2203 break;
2204 if (chk->action == TCPCHK_ACT_COMMENT ||
2205 chk->action == TCPCHK_ACT_ACTION_KW ||
2206 (chk->action == TCPCHK_ACT_SEND && (chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)))
2207 continue;
2208
2209 memprintf(errmsg, "first step MUST also be a 'connect', "
2210 "optionally preceded by a 'set-var', an 'unset-var' or a 'comment', "
2211 "when there is a 'connect' step in the tcp-check ruleset");
2212 goto error;
2213 }
2214
2215 cur_arg++;
2216 while (*(args[cur_arg])) {
2217 if (strcmp(args[cur_arg], "default") == 0)
2218 conn_opts |= TCPCHK_OPT_DEFAULT_CONNECT;
2219 else if (strcmp(args[cur_arg], "addr") == 0) {
2220 int port1, port2;
Willy Tarreau51cd5952020-06-05 12:25:38 +02002221
2222 if (!*(args[cur_arg+1])) {
2223 memprintf(errmsg, "'%s' expects <ipv4|ipv6> as argument.", args[cur_arg]);
2224 goto error;
2225 }
2226
Willy Tarreau65ec4e32020-09-16 19:17:08 +02002227 sk = str2sa_range(args[cur_arg+1], NULL, &port1, &port2, NULL, NULL,
2228 errmsg, NULL, NULL, PA_O_RESOLVE | PA_O_PORT_OK | PA_O_STREAM | PA_O_CONNECT);
Willy Tarreau51cd5952020-06-05 12:25:38 +02002229 if (!sk) {
2230 memprintf(errmsg, "'%s' : %s.", args[cur_arg], *errmsg);
2231 goto error;
2232 }
2233
Willy Tarreau51cd5952020-06-05 12:25:38 +02002234 cur_arg++;
2235 }
2236 else if (strcmp(args[cur_arg], "port") == 0) {
2237 const char *p, *end;
2238
2239 if (!*(args[cur_arg+1])) {
2240 memprintf(errmsg, "'%s' expects a port number or a sample expression as argument.", args[cur_arg]);
2241 goto error;
2242 }
2243 cur_arg++;
2244
2245 port = 0;
2246 release_sample_expr(port_expr);
2247 p = args[cur_arg]; end = p + strlen(p);
2248 port = read_uint(&p, end);
2249 if (p != end) {
2250 int idx = 0;
2251
2252 px->conf.args.ctx = ARGC_SRV;
2253 port_expr = sample_parse_expr((char *[]){args[cur_arg], NULL}, &idx,
2254 file, line, errmsg, &px->conf.args, NULL);
2255
2256 if (!port_expr) {
2257 memprintf(errmsg, "error detected while parsing port expression : %s", *errmsg);
2258 goto error;
2259 }
2260 if (!(port_expr->fetch->val & SMP_VAL_BE_CHK_RUL)) {
2261 memprintf(errmsg, "error detected while parsing port expression : "
2262 " fetch method '%s' extracts information from '%s', "
2263 "none of which is available here.\n",
2264 args[cur_arg], sample_src_names(port_expr->fetch->use));
2265 goto error;
2266 }
2267 px->http_needed |= !!(port_expr->fetch->use & SMP_USE_HTTP_ANY);
2268 }
2269 else if (port > 65535 || port < 1) {
2270 memprintf(errmsg, "expects a valid TCP port (from range 1 to 65535) or a sample expression, got %s.",
2271 args[cur_arg]);
2272 goto error;
2273 }
2274 }
2275 else if (strcmp(args[cur_arg], "proto") == 0) {
2276 if (!*(args[cur_arg+1])) {
2277 memprintf(errmsg, "'%s' expects a MUX protocol as argument.", args[cur_arg]);
2278 goto error;
2279 }
2280 mux_proto = get_mux_proto(ist2(args[cur_arg+1], strlen(args[cur_arg+1])));
2281 if (!mux_proto) {
2282 memprintf(errmsg, "'%s' : unknown MUX protocol '%s'.", args[cur_arg], args[cur_arg+1]);
2283 goto error;
2284 }
2285 cur_arg++;
2286 }
2287 else if (strcmp(args[cur_arg], "comment") == 0) {
2288 if (!*(args[cur_arg+1])) {
2289 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2290 goto error;
2291 }
2292 cur_arg++;
2293 free(comment);
2294 comment = strdup(args[cur_arg]);
2295 if (!comment) {
2296 memprintf(errmsg, "out of memory");
2297 goto error;
2298 }
2299 }
2300 else if (strcmp(args[cur_arg], "send-proxy") == 0)
2301 conn_opts |= TCPCHK_OPT_SEND_PROXY;
2302 else if (strcmp(args[cur_arg], "via-socks4") == 0)
2303 conn_opts |= TCPCHK_OPT_SOCKS4;
2304 else if (strcmp(args[cur_arg], "linger") == 0)
2305 conn_opts |= TCPCHK_OPT_LINGER;
2306#ifdef USE_OPENSSL
2307 else if (strcmp(args[cur_arg], "ssl") == 0) {
2308 px->options |= PR_O_TCPCHK_SSL;
2309 conn_opts |= TCPCHK_OPT_SSL;
2310 }
2311 else if (strcmp(args[cur_arg], "sni") == 0) {
2312 if (!*(args[cur_arg+1])) {
2313 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2314 goto error;
2315 }
2316 cur_arg++;
2317 free(sni);
2318 sni = strdup(args[cur_arg]);
2319 if (!sni) {
2320 memprintf(errmsg, "out of memory");
2321 goto error;
2322 }
2323 }
2324 else if (strcmp(args[cur_arg], "alpn") == 0) {
2325#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
2326 free(alpn);
2327 if (ssl_sock_parse_alpn(args[cur_arg + 1], &alpn, &alpn_len, errmsg)) {
2328 memprintf(errmsg, "'%s' : %s", args[cur_arg], *errmsg);
2329 goto error;
2330 }
2331 cur_arg++;
2332#else
2333 memprintf(errmsg, "'%s' : library does not support TLS ALPN extension.", args[cur_arg]);
2334 goto error;
2335#endif
2336 }
2337#endif /* USE_OPENSSL */
2338
2339 else {
2340 memprintf(errmsg, "expects 'comment', 'port', 'addr', 'send-proxy'"
2341#ifdef USE_OPENSSL
2342 ", 'ssl', 'sni', 'alpn'"
2343#endif /* USE_OPENSSL */
2344 " or 'via-socks4', 'linger', 'default' but got '%s' as argument.",
2345 args[cur_arg]);
2346 goto error;
2347 }
2348 cur_arg++;
2349 }
2350
2351 chk = calloc(1, sizeof(*chk));
2352 if (!chk) {
2353 memprintf(errmsg, "out of memory");
2354 goto error;
2355 }
2356 chk->action = TCPCHK_ACT_CONNECT;
2357 chk->comment = comment;
2358 chk->connect.port = port;
2359 chk->connect.options = conn_opts;
2360 chk->connect.sni = sni;
2361 chk->connect.alpn = alpn;
2362 chk->connect.alpn_len= alpn_len;
2363 chk->connect.port_expr= port_expr;
2364 chk->connect.mux_proto= mux_proto;
2365 if (sk)
2366 chk->connect.addr = *sk;
2367 return chk;
2368
2369 error:
2370 free(alpn);
2371 free(sni);
2372 free(comment);
2373 release_sample_expr(port_expr);
2374 return NULL;
2375}
2376
2377/* Parses and creates a tcp-check send rule. NULL is returned on error */
2378struct tcpcheck_rule *parse_tcpcheck_send(char **args, int cur_arg, struct proxy *px, struct list *rules,
2379 const char *file, int line, char **errmsg)
2380{
2381 struct tcpcheck_rule *chk = NULL;
2382 char *comment = NULL, *data = NULL;
2383 enum tcpcheck_send_type type = TCPCHK_SEND_UNDEF;
2384
2385 if (strcmp(args[cur_arg], "send-binary-lf") == 0)
2386 type = TCPCHK_SEND_BINARY_LF;
2387 else if (strcmp(args[cur_arg], "send-binary") == 0)
2388 type = TCPCHK_SEND_BINARY;
2389 else if (strcmp(args[cur_arg], "send-lf") == 0)
2390 type = TCPCHK_SEND_STRING_LF;
2391 else if (strcmp(args[cur_arg], "send") == 0)
2392 type = TCPCHK_SEND_STRING;
2393
2394 if (!*(args[cur_arg+1])) {
2395 memprintf(errmsg, "'%s' expects a %s as argument",
2396 (type == TCPCHK_SEND_BINARY ? "binary string": "string"), args[cur_arg]);
2397 goto error;
2398 }
2399
2400 data = args[cur_arg+1];
2401
2402 cur_arg += 2;
2403 while (*(args[cur_arg])) {
2404 if (strcmp(args[cur_arg], "comment") == 0) {
2405 if (!*(args[cur_arg+1])) {
2406 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2407 goto error;
2408 }
2409 cur_arg++;
2410 free(comment);
2411 comment = strdup(args[cur_arg]);
2412 if (!comment) {
2413 memprintf(errmsg, "out of memory");
2414 goto error;
2415 }
2416 }
2417 else {
2418 memprintf(errmsg, "expects 'comment' but got '%s' as argument.",
2419 args[cur_arg]);
2420 goto error;
2421 }
2422 cur_arg++;
2423 }
2424
2425 chk = calloc(1, sizeof(*chk));
2426 if (!chk) {
2427 memprintf(errmsg, "out of memory");
2428 goto error;
2429 }
2430 chk->action = TCPCHK_ACT_SEND;
2431 chk->comment = comment;
2432 chk->send.type = type;
2433
2434 switch (chk->send.type) {
2435 case TCPCHK_SEND_STRING:
2436 chk->send.data = ist2(strdup(data), strlen(data));
2437 if (!isttest(chk->send.data)) {
2438 memprintf(errmsg, "out of memory");
2439 goto error;
2440 }
2441 break;
2442 case TCPCHK_SEND_BINARY: {
2443 int len = chk->send.data.len;
2444 if (parse_binary(data, &chk->send.data.ptr, &len, errmsg) == 0) {
2445 memprintf(errmsg, "'%s' invalid binary string (%s).\n", data, *errmsg);
2446 goto error;
2447 }
2448 chk->send.data.len = len;
2449 break;
2450 }
2451 case TCPCHK_SEND_STRING_LF:
2452 case TCPCHK_SEND_BINARY_LF:
2453 LIST_INIT(&chk->send.fmt);
2454 px->conf.args.ctx = ARGC_SRV;
2455 if (!parse_logformat_string(data, px, &chk->send.fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
2456 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", data, *errmsg);
2457 goto error;
2458 }
2459 break;
2460 case TCPCHK_SEND_HTTP:
2461 case TCPCHK_SEND_UNDEF:
2462 goto error;
2463 }
2464
2465 return chk;
2466
2467 error:
2468 free(chk);
2469 free(comment);
2470 return NULL;
2471}
2472
2473/* Parses and creates a http-check send rule. NULL is returned on error */
2474struct tcpcheck_rule *parse_tcpcheck_send_http(char **args, int cur_arg, struct proxy *px, struct list *rules,
2475 const char *file, int line, char **errmsg)
2476{
2477 struct tcpcheck_rule *chk = NULL;
2478 struct tcpcheck_http_hdr *hdr = NULL;
2479 struct http_hdr hdrs[global.tune.max_http_hdr];
2480 char *meth = NULL, *uri = NULL, *vsn = NULL;
2481 char *body = NULL, *comment = NULL;
2482 unsigned int flags = 0;
2483 int i = 0, host_hdr = -1;
2484
2485 cur_arg++;
2486 while (*(args[cur_arg])) {
2487 if (strcmp(args[cur_arg], "meth") == 0) {
2488 if (!*(args[cur_arg+1])) {
2489 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2490 goto error;
2491 }
2492 cur_arg++;
2493 meth = args[cur_arg];
2494 }
2495 else if (strcmp(args[cur_arg], "uri") == 0 || strcmp(args[cur_arg], "uri-lf") == 0) {
2496 if (!*(args[cur_arg+1])) {
2497 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2498 goto error;
2499 }
2500 flags &= ~TCPCHK_SND_HTTP_FL_URI_FMT;
2501 if (strcmp(args[cur_arg], "uri-lf") == 0)
2502 flags |= TCPCHK_SND_HTTP_FL_URI_FMT;
2503 cur_arg++;
2504 uri = args[cur_arg];
2505 }
2506 else if (strcmp(args[cur_arg], "ver") == 0) {
2507 if (!*(args[cur_arg+1])) {
2508 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2509 goto error;
2510 }
2511 cur_arg++;
2512 vsn = args[cur_arg];
2513 }
2514 else if (strcmp(args[cur_arg], "hdr") == 0) {
2515 if (!*args[cur_arg+1] || !*args[cur_arg+2]) {
2516 memprintf(errmsg, "'%s' expects <name> and <value> as arguments", args[cur_arg]);
2517 goto error;
2518 }
2519
2520 if (strcasecmp(args[cur_arg+1], "host") == 0) {
2521 if (host_hdr >= 0) {
2522 memprintf(errmsg, "'%s' header already defined (previous value is '%s')",
2523 args[cur_arg+1], istptr(hdrs[host_hdr].v));
2524 goto error;
2525 }
2526 host_hdr = i;
2527 }
2528 else if (strcasecmp(args[cur_arg+1], "connection") == 0 ||
2529 strcasecmp(args[cur_arg+1], "content-length") == 0 ||
2530 strcasecmp(args[cur_arg+1], "transfer-encoding") == 0)
2531 goto skip_hdr;
2532
2533 hdrs[i].n = ist2(args[cur_arg+1], strlen(args[cur_arg+1]));
2534 hdrs[i].v = ist2(args[cur_arg+2], strlen(args[cur_arg+2]));
2535 i++;
2536 skip_hdr:
2537 cur_arg += 2;
2538 }
2539 else if (strcmp(args[cur_arg], "body") == 0 || strcmp(args[cur_arg], "body-lf") == 0) {
2540 if (!*(args[cur_arg+1])) {
2541 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2542 goto error;
2543 }
2544 flags &= ~TCPCHK_SND_HTTP_FL_BODY_FMT;
2545 if (strcmp(args[cur_arg], "body-lf") == 0)
2546 flags |= TCPCHK_SND_HTTP_FL_BODY_FMT;
2547 cur_arg++;
2548 body = args[cur_arg];
2549 }
2550 else if (strcmp(args[cur_arg], "comment") == 0) {
2551 if (!*(args[cur_arg+1])) {
2552 memprintf(errmsg, "'%s' expects a string as argument.", args[cur_arg]);
2553 goto error;
2554 }
2555 cur_arg++;
2556 free(comment);
2557 comment = strdup(args[cur_arg]);
2558 if (!comment) {
2559 memprintf(errmsg, "out of memory");
2560 goto error;
2561 }
2562 }
2563 else {
2564 memprintf(errmsg, "expects 'comment', 'meth', 'uri', 'uri-lf', 'ver', 'hdr', 'body' or 'body-lf'"
2565 " but got '%s' as argument.", args[cur_arg]);
2566 goto error;
2567 }
2568 cur_arg++;
2569 }
2570
2571 hdrs[i].n = hdrs[i].v = IST_NULL;
2572
2573 chk = calloc(1, sizeof(*chk));
2574 if (!chk) {
2575 memprintf(errmsg, "out of memory");
2576 goto error;
2577 }
2578 chk->action = TCPCHK_ACT_SEND;
2579 chk->comment = comment; comment = NULL;
2580 chk->send.type = TCPCHK_SEND_HTTP;
2581 chk->send.http.flags = flags;
2582 LIST_INIT(&chk->send.http.hdrs);
2583
2584 if (meth) {
2585 chk->send.http.meth.meth = find_http_meth(meth, strlen(meth));
2586 chk->send.http.meth.str.area = strdup(meth);
2587 chk->send.http.meth.str.data = strlen(meth);
2588 if (!chk->send.http.meth.str.area) {
2589 memprintf(errmsg, "out of memory");
2590 goto error;
2591 }
2592 }
2593 if (uri) {
2594 if (chk->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) {
2595 LIST_INIT(&chk->send.http.uri_fmt);
2596 px->conf.args.ctx = ARGC_SRV;
2597 if (!parse_logformat_string(uri, px, &chk->send.http.uri_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
2598 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", uri, *errmsg);
2599 goto error;
2600 }
2601 }
2602 else {
2603 chk->send.http.uri = ist2(strdup(uri), strlen(uri));
2604 if (!isttest(chk->send.http.uri)) {
2605 memprintf(errmsg, "out of memory");
2606 goto error;
2607 }
2608 }
2609 }
2610 if (vsn) {
2611 chk->send.http.vsn = ist2(strdup(vsn), strlen(vsn));
2612 if (!isttest(chk->send.http.vsn)) {
2613 memprintf(errmsg, "out of memory");
2614 goto error;
2615 }
2616 }
2617 for (i = 0; istlen(hdrs[i].n); i++) {
2618 hdr = calloc(1, sizeof(*hdr));
2619 if (!hdr) {
2620 memprintf(errmsg, "out of memory");
2621 goto error;
2622 }
2623 LIST_INIT(&hdr->value);
2624 hdr->name = istdup(hdrs[i].n);
2625 if (!isttest(hdr->name)) {
2626 memprintf(errmsg, "out of memory");
2627 goto error;
2628 }
2629
2630 ist0(hdrs[i].v);
2631 if (!parse_logformat_string(istptr(hdrs[i].v), px, &hdr->value, 0, SMP_VAL_BE_CHK_RUL, errmsg))
2632 goto error;
2633 LIST_ADDQ(&chk->send.http.hdrs, &hdr->list);
2634 hdr = NULL;
2635 }
2636
2637 if (body) {
2638 if (chk->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) {
2639 LIST_INIT(&chk->send.http.body_fmt);
2640 px->conf.args.ctx = ARGC_SRV;
2641 if (!parse_logformat_string(body, px, &chk->send.http.body_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
2642 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", body, *errmsg);
2643 goto error;
2644 }
2645 }
2646 else {
2647 chk->send.http.body = ist2(strdup(body), strlen(body));
2648 if (!isttest(chk->send.http.body)) {
2649 memprintf(errmsg, "out of memory");
2650 goto error;
2651 }
2652 }
2653 }
2654
2655 return chk;
2656
2657 error:
2658 free_tcpcheck_http_hdr(hdr);
2659 free_tcpcheck(chk, 0);
2660 free(comment);
2661 return NULL;
2662}
2663
2664/* Parses and creates a http-check comment rule. NULL is returned on error */
2665struct tcpcheck_rule *parse_tcpcheck_comment(char **args, int cur_arg, struct proxy *px, struct list *rules,
2666 const char *file, int line, char **errmsg)
2667{
2668 struct tcpcheck_rule *chk = NULL;
2669 char *comment = NULL;
2670
2671 if (!*(args[cur_arg+1])) {
2672 memprintf(errmsg, "expects a string as argument");
2673 goto error;
2674 }
2675 cur_arg++;
2676 comment = strdup(args[cur_arg]);
2677 if (!comment) {
2678 memprintf(errmsg, "out of memory");
2679 goto error;
2680 }
2681
2682 chk = calloc(1, sizeof(*chk));
2683 if (!chk) {
2684 memprintf(errmsg, "out of memory");
2685 goto error;
2686 }
2687 chk->action = TCPCHK_ACT_COMMENT;
2688 chk->comment = comment;
2689 return chk;
2690
2691 error:
2692 free(comment);
2693 return NULL;
2694}
2695
2696/* Parses and creates a tcp-check or an http-check expect rule. NULL is returned
2697 * on error. <proto> is set to the right protocol flags (covered by the
2698 * TCPCHK_RULES_PROTO_CHK mask).
2699 */
2700struct tcpcheck_rule *parse_tcpcheck_expect(char **args, int cur_arg, struct proxy *px,
2701 struct list *rules, unsigned int proto,
2702 const char *file, int line, char **errmsg)
2703{
2704 struct tcpcheck_rule *prev_check, *chk = NULL;
2705 struct sample_expr *status_expr = NULL;
2706 char *on_success_msg, *on_error_msg, *comment, *pattern, *npat, *vpat;
2707 enum tcpcheck_expect_type type = TCPCHK_EXPECT_UNDEF;
2708 enum healthcheck_status ok_st = HCHK_STATUS_UNKNOWN;
2709 enum healthcheck_status err_st = HCHK_STATUS_UNKNOWN;
2710 enum healthcheck_status tout_st = HCHK_STATUS_UNKNOWN;
2711 unsigned int flags = 0;
2712 long min_recv = -1;
2713 int inverse = 0;
2714
2715 on_success_msg = on_error_msg = comment = pattern = npat = vpat = NULL;
2716 if (!*(args[cur_arg+1])) {
2717 memprintf(errmsg, "expects at least a matching pattern as arguments");
2718 goto error;
2719 }
2720
2721 cur_arg++;
2722 while (*(args[cur_arg])) {
2723 int in_pattern = 0;
2724
2725 rescan:
2726 if (strcmp(args[cur_arg], "min-recv") == 0) {
2727 if (in_pattern) {
2728 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2729 goto error;
2730 }
2731 if (!*(args[cur_arg+1])) {
2732 memprintf(errmsg, "'%s' expects a integer as argument", args[cur_arg]);
2733 goto error;
2734 }
2735 /* Use an signed integer here because of chksize */
2736 cur_arg++;
2737 min_recv = atol(args[cur_arg]);
2738 if (min_recv < -1 || min_recv > INT_MAX) {
2739 memprintf(errmsg, "'%s' expects -1 or an integer from 0 to INT_MAX" , args[cur_arg-1]);
2740 goto error;
2741 }
2742 }
2743 else if (*(args[cur_arg]) == '!') {
2744 in_pattern = 1;
2745 while (*(args[cur_arg]) == '!') {
2746 inverse = !inverse;
2747 args[cur_arg]++;
2748 }
2749 if (!*(args[cur_arg]))
2750 cur_arg++;
2751 goto rescan;
2752 }
2753 else if (strcmp(args[cur_arg], "string") == 0 || strcmp(args[cur_arg], "rstring") == 0) {
2754 if (type != TCPCHK_EXPECT_UNDEF) {
2755 memprintf(errmsg, "only on pattern expected");
2756 goto error;
2757 }
2758 if (proto != TCPCHK_RULES_HTTP_CHK)
2759 type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_STRING : TCPCHK_EXPECT_STRING_REGEX);
2760 else
2761 type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_HTTP_BODY : TCPCHK_EXPECT_HTTP_BODY_REGEX);
2762
2763 if (!*(args[cur_arg+1])) {
2764 memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
2765 goto error;
2766 }
2767 cur_arg++;
2768 pattern = args[cur_arg];
2769 }
2770 else if (strcmp(args[cur_arg], "binary") == 0 || strcmp(args[cur_arg], "rbinary") == 0) {
2771 if (proto == TCPCHK_RULES_HTTP_CHK)
2772 goto bad_http_kw;
2773 if (type != TCPCHK_EXPECT_UNDEF) {
2774 memprintf(errmsg, "only on pattern expected");
2775 goto error;
2776 }
2777 type = ((*(args[cur_arg]) == 'b') ? TCPCHK_EXPECT_BINARY : TCPCHK_EXPECT_BINARY_REGEX);
2778
2779 if (!*(args[cur_arg+1])) {
2780 memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
2781 goto error;
2782 }
2783 cur_arg++;
2784 pattern = args[cur_arg];
2785 }
2786 else if (strcmp(args[cur_arg], "string-lf") == 0 || strcmp(args[cur_arg], "binary-lf") == 0) {
2787 if (type != TCPCHK_EXPECT_UNDEF) {
2788 memprintf(errmsg, "only on pattern expected");
2789 goto error;
2790 }
2791 if (proto != TCPCHK_RULES_HTTP_CHK)
2792 type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_STRING_LF : TCPCHK_EXPECT_BINARY_LF);
2793 else {
2794 if (*(args[cur_arg]) != 's')
2795 goto bad_http_kw;
2796 type = TCPCHK_EXPECT_HTTP_BODY_LF;
2797 }
2798
2799 if (!*(args[cur_arg+1])) {
2800 memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
2801 goto error;
2802 }
2803 cur_arg++;
2804 pattern = args[cur_arg];
2805 }
2806 else if (strcmp(args[cur_arg], "status") == 0 || strcmp(args[cur_arg], "rstatus") == 0) {
2807 if (proto != TCPCHK_RULES_HTTP_CHK)
2808 goto bad_tcp_kw;
2809 if (type != TCPCHK_EXPECT_UNDEF) {
2810 memprintf(errmsg, "only on pattern expected");
2811 goto error;
2812 }
2813 type = ((*(args[cur_arg]) == 's') ? TCPCHK_EXPECT_HTTP_STATUS : TCPCHK_EXPECT_HTTP_STATUS_REGEX);
2814
2815 if (!*(args[cur_arg+1])) {
2816 memprintf(errmsg, "'%s' expects a <pattern> as argument", args[cur_arg]);
2817 goto error;
2818 }
2819 cur_arg++;
2820 pattern = args[cur_arg];
2821 }
2822 else if (strcmp(args[cur_arg], "custom") == 0) {
2823 if (in_pattern) {
2824 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2825 goto error;
2826 }
2827 if (type != TCPCHK_EXPECT_UNDEF) {
2828 memprintf(errmsg, "only on pattern expected");
2829 goto error;
2830 }
2831 type = TCPCHK_EXPECT_CUSTOM;
2832 }
2833 else if (strcmp(args[cur_arg], "hdr") == 0 || strcmp(args[cur_arg], "fhdr") == 0) {
2834 int orig_arg = cur_arg;
2835
2836 if (proto != TCPCHK_RULES_HTTP_CHK)
2837 goto bad_tcp_kw;
2838 if (type != TCPCHK_EXPECT_UNDEF) {
2839 memprintf(errmsg, "only on pattern expected");
2840 goto error;
2841 }
2842 type = TCPCHK_EXPECT_HTTP_HEADER;
2843
2844 if (strcmp(args[cur_arg], "fhdr") == 0)
2845 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_FULL;
2846
2847 /* Parse the name pattern, mandatory */
2848 if (!*(args[cur_arg+1]) || !*(args[cur_arg+2]) ||
2849 (strcmp(args[cur_arg+1], "name") != 0 && strcmp(args[cur_arg+1], "name-lf") != 0)) {
2850 memprintf(errmsg, "'%s' expects at the name keyword as first argument followed by a pattern",
2851 args[orig_arg]);
2852 goto error;
2853 }
2854
2855 if (strcmp(args[cur_arg+1], "name-lf") == 0)
2856 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_FMT;
2857
2858 cur_arg += 2;
2859 if (strcmp(args[cur_arg], "-m") == 0) {
2860 if (!*(args[cur_arg+1])) {
2861 memprintf(errmsg, "'%s' : '%s' expects at a matching pattern ('str', 'beg', 'end', 'sub' or 'reg')",
2862 args[orig_arg], args[cur_arg]);
2863 goto error;
2864 }
2865 if (strcmp(args[cur_arg+1], "str") == 0)
2866 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_STR;
2867 else if (strcmp(args[cur_arg+1], "beg") == 0)
2868 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_BEG;
2869 else if (strcmp(args[cur_arg+1], "end") == 0)
2870 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_END;
2871 else if (strcmp(args[cur_arg+1], "sub") == 0)
2872 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_SUB;
2873 else if (strcmp(args[cur_arg+1], "reg") == 0) {
2874 if (flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT) {
2875 memprintf(errmsg, "'%s': log-format string is not supported with a regex matching method",
2876 args[orig_arg]);
2877 goto error;
2878 }
2879 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_REG;
2880 }
2881 else {
2882 memprintf(errmsg, "'%s' : '%s' only supports 'str', 'beg', 'end', 'sub' or 'reg' (got '%s')",
2883 args[orig_arg], args[cur_arg], args[cur_arg+1]);
2884 goto error;
2885 }
2886 cur_arg += 2;
2887 }
2888 else
2889 flags |= TCPCHK_EXPT_FL_HTTP_HNAME_STR;
2890 npat = args[cur_arg];
2891
2892 if (!*(args[cur_arg+1]) ||
2893 (strcmp(args[cur_arg+1], "value") != 0 && strcmp(args[cur_arg+1], "value-lf") != 0)) {
2894 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_NONE;
2895 goto next;
2896 }
2897 if (strcmp(args[cur_arg+1], "value-lf") == 0)
2898 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_FMT;
2899
2900 /* Parse the value pattern, optional */
2901 if (strcmp(args[cur_arg+2], "-m") == 0) {
2902 cur_arg += 2;
2903 if (!*(args[cur_arg+1])) {
2904 memprintf(errmsg, "'%s' : '%s' expects at a matching pattern ('str', 'beg', 'end', 'sub' or 'reg')",
2905 args[orig_arg], args[cur_arg]);
2906 goto error;
2907 }
2908 if (strcmp(args[cur_arg+1], "str") == 0)
2909 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_STR;
2910 else if (strcmp(args[cur_arg+1], "beg") == 0)
2911 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_BEG;
2912 else if (strcmp(args[cur_arg+1], "end") == 0)
2913 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_END;
2914 else if (strcmp(args[cur_arg+1], "sub") == 0)
2915 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_SUB;
2916 else if (strcmp(args[cur_arg+1], "reg") == 0) {
2917 if (flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT) {
2918 memprintf(errmsg, "'%s': log-format string is not supported with a regex matching method",
2919 args[orig_arg]);
2920 goto error;
2921 }
2922 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_REG;
2923 }
2924 else {
2925 memprintf(errmsg, "'%s' : '%s' only supports 'str', 'beg', 'end', 'sub' or 'reg' (got '%s')",
2926 args[orig_arg], args[cur_arg], args[cur_arg+1]);
2927 goto error;
2928 }
2929 }
2930 else
2931 flags |= TCPCHK_EXPT_FL_HTTP_HVAL_STR;
2932
2933 if (!*(args[cur_arg+2])) {
2934 memprintf(errmsg, "'%s' expect a pattern with the value keyword", args[orig_arg]);
2935 goto error;
2936 }
2937 vpat = args[cur_arg+2];
2938 cur_arg += 2;
2939 }
2940 else if (strcmp(args[cur_arg], "comment") == 0) {
2941 if (in_pattern) {
2942 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2943 goto error;
2944 }
2945 if (!*(args[cur_arg+1])) {
2946 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
2947 goto error;
2948 }
2949 cur_arg++;
2950 free(comment);
2951 comment = strdup(args[cur_arg]);
2952 if (!comment) {
2953 memprintf(errmsg, "out of memory");
2954 goto error;
2955 }
2956 }
2957 else if (strcmp(args[cur_arg], "on-success") == 0) {
2958 if (in_pattern) {
2959 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2960 goto error;
2961 }
2962 if (!*(args[cur_arg+1])) {
2963 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
2964 goto error;
2965 }
2966 cur_arg++;
2967 on_success_msg = args[cur_arg];
2968 }
2969 else if (strcmp(args[cur_arg], "on-error") == 0) {
2970 if (in_pattern) {
2971 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2972 goto error;
2973 }
2974 if (!*(args[cur_arg+1])) {
2975 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
2976 goto error;
2977 }
2978 cur_arg++;
2979 on_error_msg = args[cur_arg];
2980 }
2981 else if (strcmp(args[cur_arg], "ok-status") == 0) {
2982 if (in_pattern) {
2983 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
2984 goto error;
2985 }
2986 if (!*(args[cur_arg+1])) {
2987 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
2988 goto error;
2989 }
2990 if (strcasecmp(args[cur_arg+1], "L7OK") == 0)
2991 ok_st = HCHK_STATUS_L7OKD;
2992 else if (strcasecmp(args[cur_arg+1], "L7OKC") == 0)
2993 ok_st = HCHK_STATUS_L7OKCD;
2994 else if (strcasecmp(args[cur_arg+1], "L6OK") == 0)
2995 ok_st = HCHK_STATUS_L6OK;
2996 else if (strcasecmp(args[cur_arg+1], "L4OK") == 0)
2997 ok_st = HCHK_STATUS_L4OK;
2998 else {
2999 memprintf(errmsg, "'%s' only supports 'L4OK', 'L6OK', 'L7OK' or 'L7OKC' status (got '%s').",
3000 args[cur_arg], args[cur_arg+1]);
3001 goto error;
3002 }
3003 cur_arg++;
3004 }
3005 else if (strcmp(args[cur_arg], "error-status") == 0) {
3006 if (in_pattern) {
3007 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
3008 goto error;
3009 }
3010 if (!*(args[cur_arg+1])) {
3011 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
3012 goto error;
3013 }
3014 if (strcasecmp(args[cur_arg+1], "L7RSP") == 0)
3015 err_st = HCHK_STATUS_L7RSP;
3016 else if (strcasecmp(args[cur_arg+1], "L7STS") == 0)
3017 err_st = HCHK_STATUS_L7STS;
3018 else if (strcasecmp(args[cur_arg+1], "L6RSP") == 0)
3019 err_st = HCHK_STATUS_L6RSP;
3020 else if (strcasecmp(args[cur_arg+1], "L4CON") == 0)
3021 err_st = HCHK_STATUS_L4CON;
3022 else {
3023 memprintf(errmsg, "'%s' only supports 'L4CON', 'L6RSP', 'L7RSP' or 'L7STS' status (got '%s').",
3024 args[cur_arg], args[cur_arg+1]);
3025 goto error;
3026 }
3027 cur_arg++;
3028 }
3029 else if (strcmp(args[cur_arg], "status-code") == 0) {
3030 int idx = 0;
3031
3032 if (in_pattern) {
3033 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
3034 goto error;
3035 }
3036 if (!*(args[cur_arg+1])) {
3037 memprintf(errmsg, "'%s' expects an expression as argument", args[cur_arg]);
3038 goto error;
3039 }
3040
3041 cur_arg++;
3042 release_sample_expr(status_expr);
3043 px->conf.args.ctx = ARGC_SRV;
3044 status_expr = sample_parse_expr((char *[]){args[cur_arg], NULL}, &idx,
3045 file, line, errmsg, &px->conf.args, NULL);
3046 if (!status_expr) {
3047 memprintf(errmsg, "error detected while parsing status-code expression : %s", *errmsg);
3048 goto error;
3049 }
3050 if (!(status_expr->fetch->val & SMP_VAL_BE_CHK_RUL)) {
3051 memprintf(errmsg, "error detected while parsing status-code expression : "
3052 " fetch method '%s' extracts information from '%s', "
3053 "none of which is available here.\n",
3054 args[cur_arg], sample_src_names(status_expr->fetch->use));
3055 goto error;
3056 }
3057 px->http_needed |= !!(status_expr->fetch->use & SMP_USE_HTTP_ANY);
3058 }
3059 else if (strcmp(args[cur_arg], "tout-status") == 0) {
3060 if (in_pattern) {
3061 memprintf(errmsg, "[!] not supported with '%s'", args[cur_arg]);
3062 goto error;
3063 }
3064 if (!*(args[cur_arg+1])) {
3065 memprintf(errmsg, "'%s' expects a string as argument", args[cur_arg]);
3066 goto error;
3067 }
3068 if (strcasecmp(args[cur_arg+1], "L7TOUT") == 0)
3069 tout_st = HCHK_STATUS_L7TOUT;
3070 else if (strcasecmp(args[cur_arg+1], "L6TOUT") == 0)
3071 tout_st = HCHK_STATUS_L6TOUT;
3072 else if (strcasecmp(args[cur_arg+1], "L4TOUT") == 0)
3073 tout_st = HCHK_STATUS_L4TOUT;
3074 else {
3075 memprintf(errmsg, "'%s' only supports 'L4TOUT', 'L6TOUT' or 'L7TOUT' status (got '%s').",
3076 args[cur_arg], args[cur_arg+1]);
3077 goto error;
3078 }
3079 cur_arg++;
3080 }
3081 else {
3082 if (proto == TCPCHK_RULES_HTTP_CHK) {
3083 bad_http_kw:
3084 memprintf(errmsg, "'only supports min-recv, [!]string', '[!]rstring', '[!]string-lf', '[!]status', "
3085 "'[!]rstatus', [!]hdr, [!]fhdr or comment but got '%s' as argument.", args[cur_arg]);
3086 }
3087 else {
3088 bad_tcp_kw:
3089 memprintf(errmsg, "'only supports min-recv, '[!]binary', '[!]string', '[!]rstring', '[!]string-lf'"
3090 "'[!]rbinary', '[!]binary-lf' or comment but got '%s' as argument.", args[cur_arg]);
3091 }
3092 goto error;
3093 }
3094 next:
3095 cur_arg++;
3096 }
3097
3098 chk = calloc(1, sizeof(*chk));
3099 if (!chk) {
3100 memprintf(errmsg, "out of memory");
3101 goto error;
3102 }
3103 chk->action = TCPCHK_ACT_EXPECT;
3104 LIST_INIT(&chk->expect.onerror_fmt);
3105 LIST_INIT(&chk->expect.onsuccess_fmt);
3106 chk->comment = comment; comment = NULL;
3107 chk->expect.type = type;
3108 chk->expect.min_recv = min_recv;
3109 chk->expect.flags = flags | (inverse ? TCPCHK_EXPT_FL_INV : 0);
3110 chk->expect.ok_status = ok_st;
3111 chk->expect.err_status = err_st;
3112 chk->expect.tout_status = tout_st;
3113 chk->expect.status_expr = status_expr; status_expr = NULL;
3114
3115 if (on_success_msg) {
3116 px->conf.args.ctx = ARGC_SRV;
3117 if (!parse_logformat_string(on_success_msg, px, &chk->expect.onsuccess_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3118 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", on_success_msg, *errmsg);
3119 goto error;
3120 }
3121 }
3122 if (on_error_msg) {
3123 px->conf.args.ctx = ARGC_SRV;
3124 if (!parse_logformat_string(on_error_msg, px, &chk->expect.onerror_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3125 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", on_error_msg, *errmsg);
3126 goto error;
3127 }
3128 }
3129
3130 switch (chk->expect.type) {
3131 case TCPCHK_EXPECT_HTTP_STATUS: {
3132 const char *p = pattern;
3133 unsigned int c1,c2;
3134
3135 chk->expect.codes.codes = NULL;
3136 chk->expect.codes.num = 0;
3137 while (1) {
3138 c1 = c2 = read_uint(&p, pattern + strlen(pattern));
3139 if (*p == '-') {
3140 p++;
3141 c2 = read_uint(&p, pattern + strlen(pattern));
3142 }
3143 if (c1 > c2) {
3144 memprintf(errmsg, "invalid range of status codes '%s'", pattern);
3145 goto error;
3146 }
3147
3148 chk->expect.codes.num++;
3149 chk->expect.codes.codes = my_realloc2(chk->expect.codes.codes,
3150 chk->expect.codes.num * sizeof(*chk->expect.codes.codes));
3151 if (!chk->expect.codes.codes) {
3152 memprintf(errmsg, "out of memory");
3153 goto error;
3154 }
3155 chk->expect.codes.codes[chk->expect.codes.num-1][0] = c1;
3156 chk->expect.codes.codes[chk->expect.codes.num-1][1] = c2;
3157
3158 if (*p == '\0')
3159 break;
3160 if (*p != ',') {
3161 memprintf(errmsg, "invalid character '%c' in the list of status codes", *p);
3162 goto error;
3163 }
3164 p++;
3165 }
3166 break;
3167 }
3168 case TCPCHK_EXPECT_STRING:
3169 case TCPCHK_EXPECT_HTTP_BODY:
3170 chk->expect.data = ist2(strdup(pattern), strlen(pattern));
3171 if (!isttest(chk->expect.data)) {
3172 memprintf(errmsg, "out of memory");
3173 goto error;
3174 }
3175 break;
3176 case TCPCHK_EXPECT_BINARY: {
3177 int len = chk->expect.data.len;
3178
3179 if (parse_binary(pattern, &chk->expect.data.ptr, &len, errmsg) == 0) {
3180 memprintf(errmsg, "invalid binary string (%s)", *errmsg);
3181 goto error;
3182 }
3183 chk->expect.data.len = len;
3184 break;
3185 }
3186 case TCPCHK_EXPECT_STRING_REGEX:
3187 case TCPCHK_EXPECT_BINARY_REGEX:
3188 case TCPCHK_EXPECT_HTTP_STATUS_REGEX:
3189 case TCPCHK_EXPECT_HTTP_BODY_REGEX:
3190 chk->expect.regex = regex_comp(pattern, 1, 0, errmsg);
3191 if (!chk->expect.regex)
3192 goto error;
3193 break;
3194
3195 case TCPCHK_EXPECT_STRING_LF:
3196 case TCPCHK_EXPECT_BINARY_LF:
3197 case TCPCHK_EXPECT_HTTP_BODY_LF:
3198 LIST_INIT(&chk->expect.fmt);
3199 px->conf.args.ctx = ARGC_SRV;
3200 if (!parse_logformat_string(pattern, px, &chk->expect.fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3201 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", pattern, *errmsg);
3202 goto error;
3203 }
3204 break;
3205
3206 case TCPCHK_EXPECT_HTTP_HEADER:
3207 if (!npat) {
3208 memprintf(errmsg, "unexpected error, undefined header name pattern");
3209 goto error;
3210 }
3211 if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_REG) {
3212 chk->expect.hdr.name_re = regex_comp(npat, 0, 0, errmsg);
3213 if (!chk->expect.hdr.name_re)
3214 goto error;
3215 }
3216 else if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HNAME_FMT) {
3217 px->conf.args.ctx = ARGC_SRV;
3218 LIST_INIT(&chk->expect.hdr.name_fmt);
3219 if (!parse_logformat_string(npat, px, &chk->expect.hdr.name_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3220 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", npat, *errmsg);
3221 goto error;
3222 }
3223 }
3224 else {
3225 chk->expect.hdr.name = ist2(strdup(npat), strlen(npat));
3226 if (!isttest(chk->expect.hdr.name)) {
3227 memprintf(errmsg, "out of memory");
3228 goto error;
3229 }
3230 }
3231
3232 if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_NONE) {
3233 chk->expect.hdr.value = IST_NULL;
3234 break;
3235 }
3236
3237 if (!vpat) {
3238 memprintf(errmsg, "unexpected error, undefined header value pattern");
3239 goto error;
3240 }
3241 else if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_REG) {
3242 chk->expect.hdr.value_re = regex_comp(vpat, 1, 0, errmsg);
3243 if (!chk->expect.hdr.value_re)
3244 goto error;
3245 }
3246 else if (chk->expect.flags & TCPCHK_EXPT_FL_HTTP_HVAL_FMT) {
3247 px->conf.args.ctx = ARGC_SRV;
3248 LIST_INIT(&chk->expect.hdr.value_fmt);
3249 if (!parse_logformat_string(vpat, px, &chk->expect.hdr.value_fmt, 0, SMP_VAL_BE_CHK_RUL, errmsg)) {
3250 memprintf(errmsg, "'%s' invalid log-format string (%s).\n", npat, *errmsg);
3251 goto error;
3252 }
3253 }
3254 else {
3255 chk->expect.hdr.value = ist2(strdup(vpat), strlen(vpat));
3256 if (!isttest(chk->expect.hdr.value)) {
3257 memprintf(errmsg, "out of memory");
3258 goto error;
3259 }
3260 }
3261
3262 break;
3263 case TCPCHK_EXPECT_CUSTOM:
3264 chk->expect.custom = NULL; /* Must be defined by the caller ! */
3265 break;
3266 case TCPCHK_EXPECT_UNDEF:
3267 memprintf(errmsg, "pattern not found");
3268 goto error;
3269 }
3270
3271 /* All tcp-check expect points back to the first inverse expect rule in
3272 * a chain of one or more expect rule, potentially itself.
3273 */
3274 chk->expect.head = chk;
3275 list_for_each_entry_rev(prev_check, rules, list) {
3276 if (prev_check->action == TCPCHK_ACT_EXPECT) {
3277 if (prev_check->expect.flags & TCPCHK_EXPT_FL_INV)
3278 chk->expect.head = prev_check;
3279 continue;
3280 }
3281 if (prev_check->action != TCPCHK_ACT_COMMENT && prev_check->action != TCPCHK_ACT_ACTION_KW)
3282 break;
3283 }
3284 return chk;
3285
3286 error:
3287 free_tcpcheck(chk, 0);
3288 free(comment);
3289 release_sample_expr(status_expr);
3290 return NULL;
3291}
3292
3293/* Overwrites fields of the old http send rule with those of the new one. When
3294 * replaced, old values are freed and replaced by the new ones. New values are
3295 * not copied but transferred. At the end <new> should be empty and can be
3296 * safely released. This function never fails.
3297 */
3298void tcpcheck_overwrite_send_http_rule(struct tcpcheck_rule *old, struct tcpcheck_rule *new)
3299{
3300 struct logformat_node *lf, *lfb;
3301 struct tcpcheck_http_hdr *hdr, *bhdr;
3302
3303
3304 if (new->send.http.meth.str.area) {
3305 free(old->send.http.meth.str.area);
3306 old->send.http.meth.meth = new->send.http.meth.meth;
3307 old->send.http.meth.str.area = new->send.http.meth.str.area;
3308 old->send.http.meth.str.data = new->send.http.meth.str.data;
3309 new->send.http.meth.str = BUF_NULL;
3310 }
3311
3312 if (!(new->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) && isttest(new->send.http.uri)) {
3313 if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT))
3314 istfree(&old->send.http.uri);
3315 else
3316 free_tcpcheck_fmt(&old->send.http.uri_fmt);
3317 old->send.http.flags &= ~TCPCHK_SND_HTTP_FL_URI_FMT;
3318 old->send.http.uri = new->send.http.uri;
3319 new->send.http.uri = IST_NULL;
3320 }
3321 else if ((new->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT) && !LIST_ISEMPTY(&new->send.http.uri_fmt)) {
3322 if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_URI_FMT))
3323 istfree(&old->send.http.uri);
3324 else
3325 free_tcpcheck_fmt(&old->send.http.uri_fmt);
3326 old->send.http.flags |= TCPCHK_SND_HTTP_FL_URI_FMT;
3327 LIST_INIT(&old->send.http.uri_fmt);
3328 list_for_each_entry_safe(lf, lfb, &new->send.http.uri_fmt, list) {
3329 LIST_DEL(&lf->list);
3330 LIST_ADDQ(&old->send.http.uri_fmt, &lf->list);
3331 }
3332 }
3333
3334 if (isttest(new->send.http.vsn)) {
3335 istfree(&old->send.http.vsn);
3336 old->send.http.vsn = new->send.http.vsn;
3337 new->send.http.vsn = IST_NULL;
3338 }
3339
3340 free_tcpcheck_http_hdrs(&old->send.http.hdrs);
3341 list_for_each_entry_safe(hdr, bhdr, &new->send.http.hdrs, list) {
3342 LIST_DEL(&hdr->list);
3343 LIST_ADDQ(&old->send.http.hdrs, &hdr->list);
3344 }
3345
3346 if (!(new->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) && isttest(new->send.http.body)) {
3347 if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT))
3348 istfree(&old->send.http.body);
3349 else
3350 free_tcpcheck_fmt(&old->send.http.body_fmt);
3351 old->send.http.flags &= ~TCPCHK_SND_HTTP_FL_BODY_FMT;
3352 old->send.http.body = new->send.http.body;
3353 new->send.http.body = IST_NULL;
3354 }
3355 else if ((new->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT) && !LIST_ISEMPTY(&new->send.http.body_fmt)) {
3356 if (!(old->send.http.flags & TCPCHK_SND_HTTP_FL_BODY_FMT))
3357 istfree(&old->send.http.body);
3358 else
3359 free_tcpcheck_fmt(&old->send.http.body_fmt);
3360 old->send.http.flags |= TCPCHK_SND_HTTP_FL_BODY_FMT;
3361 LIST_INIT(&old->send.http.body_fmt);
3362 list_for_each_entry_safe(lf, lfb, &new->send.http.body_fmt, list) {
3363 LIST_DEL(&lf->list);
3364 LIST_ADDQ(&old->send.http.body_fmt, &lf->list);
3365 }
3366 }
3367}
3368
3369/* Internal function used to add an http-check rule in a list during the config
3370 * parsing step. Depending on its type, and the previously inserted rules, a
3371 * specific action may be performed or an error may be reported. This functions
3372 * returns 1 on success and 0 on error and <errmsg> is filled with the error
3373 * message.
3374 */
3375int tcpcheck_add_http_rule(struct tcpcheck_rule *chk, struct tcpcheck_rules *rules, char **errmsg)
3376{
3377 struct tcpcheck_rule *r;
3378
3379 /* the implicit send rule coming from an "option httpchk" line must be
3380 * merged with the first explici http-check send rule, if
Ilya Shipitsin47d17182020-06-21 21:42:57 +05003381 * any. Depending on the declaration order some tests are required.
Willy Tarreau51cd5952020-06-05 12:25:38 +02003382 *
Ilya Shipitsin47d17182020-06-21 21:42:57 +05003383 * Some tests are also required for other kinds of http-check rules to be
Willy Tarreau51cd5952020-06-05 12:25:38 +02003384 * sure the ruleset remains valid.
3385 */
3386
3387 if (chk->action == TCPCHK_ACT_SEND && (chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) {
3388 /* Tries to add an implicit http-check send rule from an "option httpchk" line.
3389 * First, the first rule is retrieved, skipping the first CONNECT, if any, and
3390 * following tests are performed :
3391 *
3392 * 1- If there is no such rule or if it is not a send rule, the implicit send
3393 * rule is pushed in front of the ruleset
3394 *
3395 * 2- If it is another implicit send rule, it is replaced with the new one.
3396 *
3397 * 3- Otherwise, it means it is an explicit send rule. In this case we merge
3398 * both, overwriting the old send rule (the explicit one) with info of the
3399 * new send rule (the implicit one).
3400 */
3401 r = get_first_tcpcheck_rule(rules);
3402 if (r && r->action == TCPCHK_ACT_CONNECT)
3403 r = get_next_tcpcheck_rule(rules, r);
3404 if (!r || r->action != TCPCHK_ACT_SEND)
3405 LIST_ADD(rules->list, &chk->list);
3406 else if (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT) {
3407 LIST_DEL(&r->list);
3408 free_tcpcheck(r, 0);
3409 LIST_ADD(rules->list, &chk->list);
3410 }
3411 else {
3412 tcpcheck_overwrite_send_http_rule(r, chk);
3413 free_tcpcheck(chk, 0);
3414 }
3415 }
3416 else {
3417 /* Tries to add an explicit http-check rule. First of all we check the typefo the
3418 * last inserted rule to be sure it is valid. Then for send rule, we try to merge it
3419 * with an existing implicit send rule, if any. At the end, if there is no error,
3420 * the rule is appended to the list.
3421 */
3422
3423 r = get_last_tcpcheck_rule(rules);
3424 if (!r || (r->action == TCPCHK_ACT_SEND && (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)))
3425 /* no error */;
3426 else if (r->action != TCPCHK_ACT_CONNECT && chk->action == TCPCHK_ACT_SEND) {
3427 memprintf(errmsg, "unable to add http-check send rule at step %d (missing connect rule).",
3428 chk->index+1);
3429 return 0;
3430 }
3431 else if (r->action != TCPCHK_ACT_SEND && r->action != TCPCHK_ACT_EXPECT && chk->action == TCPCHK_ACT_EXPECT) {
3432 memprintf(errmsg, "unable to add http-check expect rule at step %d (missing send rule).",
3433 chk->index+1);
3434 return 0;
3435 }
3436 else if (r->action != TCPCHK_ACT_EXPECT && chk->action == TCPCHK_ACT_CONNECT) {
3437 memprintf(errmsg, "unable to add http-check connect rule at step %d (missing expect rule).",
3438 chk->index+1);
3439 return 0;
3440 }
3441
3442 if (chk->action == TCPCHK_ACT_SEND) {
3443 r = get_first_tcpcheck_rule(rules);
3444 if (r && r->action == TCPCHK_ACT_SEND && (r->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) {
3445 tcpcheck_overwrite_send_http_rule(r, chk);
3446 free_tcpcheck(chk, 0);
3447 LIST_DEL(&r->list);
3448 r->send.http.flags &= ~TCPCHK_SND_HTTP_FROM_OPT;
3449 chk = r;
3450 }
3451 }
3452 LIST_ADDQ(rules->list, &chk->list);
3453 }
3454 return 1;
3455}
3456
3457/* Check tcp-check health-check configuration for the proxy <px>. */
3458static int check_proxy_tcpcheck(struct proxy *px)
3459{
3460 struct tcpcheck_rule *chk, *back;
3461 char *comment = NULL, *errmsg = NULL;
3462 enum tcpcheck_rule_type prev_action = TCPCHK_ACT_COMMENT;
3463 int ret = 0;
3464
3465 if (!(px->cap & PR_CAP_BE) || (px->options2 & PR_O2_CHK_ANY) != PR_O2_TCPCHK_CHK) {
3466 deinit_proxy_tcpcheck(px);
3467 goto out;
3468 }
3469
3470 free(px->check_command);
3471 free(px->check_path);
3472 px->check_command = px->check_path = NULL;
3473
3474 if (!px->tcpcheck_rules.list) {
3475 ha_alert("config : proxy '%s' : tcp-check configured but no ruleset defined.\n", px->id);
3476 ret |= ERR_ALERT | ERR_FATAL;
3477 goto out;
3478 }
3479
3480 /* HTTP ruleset only : */
3481 if ((px->tcpcheck_rules.flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_HTTP_CHK) {
3482 struct tcpcheck_rule *next;
3483
3484 /* move remaining implicit send rule from "option httpchk" line to the right place.
3485 * If such rule exists, it must be the first one. In this case, the rule is moved
3486 * after the first connect rule, if any. Otherwise, nothing is done.
3487 */
3488 chk = get_first_tcpcheck_rule(&px->tcpcheck_rules);
3489 if (chk && chk->action == TCPCHK_ACT_SEND && (chk->send.http.flags & TCPCHK_SND_HTTP_FROM_OPT)) {
3490 next = get_next_tcpcheck_rule(&px->tcpcheck_rules, chk);
3491 if (next && next->action == TCPCHK_ACT_CONNECT) {
3492 LIST_DEL(&chk->list);
3493 LIST_ADD(&next->list, &chk->list);
3494 chk->index = next->index;
3495 }
3496 }
3497
3498 /* add implicit expect rule if the last one is a send. It is inherited from previous
3499 * versions where the http expect rule was optional. Now it is possible to chained
3500 * send/expect rules but the last expect may still be implicit.
3501 */
3502 chk = get_last_tcpcheck_rule(&px->tcpcheck_rules);
3503 if (chk && chk->action == TCPCHK_ACT_SEND) {
3504 next = parse_tcpcheck_expect((char *[]){"http-check", "expect", "status", "200-399", ""},
3505 1, px, px->tcpcheck_rules.list, TCPCHK_RULES_HTTP_CHK,
3506 px->conf.file, px->conf.line, &errmsg);
3507 if (!next) {
3508 ha_alert("config : proxy '%s': unable to add implicit http-check expect rule "
3509 "(%s).\n", px->id, errmsg);
3510 free(errmsg);
3511 ret |= ERR_ALERT | ERR_FATAL;
3512 goto out;
3513 }
3514 LIST_ADDQ(px->tcpcheck_rules.list, &next->list);
3515 next->index = chk->index;
3516 }
3517 }
3518
3519 /* For all ruleset: */
3520
3521 /* If there is no connect rule preceding all send / expect rules, an
3522 * implicit one is inserted before all others.
3523 */
3524 chk = get_first_tcpcheck_rule(&px->tcpcheck_rules);
3525 if (!chk || chk->action != TCPCHK_ACT_CONNECT) {
3526 chk = calloc(1, sizeof(*chk));
3527 if (!chk) {
3528 ha_alert("config : proxy '%s': unable to add implicit tcp-check connect rule "
3529 "(out of memory).\n", px->id);
3530 ret |= ERR_ALERT | ERR_FATAL;
3531 goto out;
3532 }
3533 chk->action = TCPCHK_ACT_CONNECT;
3534 chk->connect.options = (TCPCHK_OPT_DEFAULT_CONNECT|TCPCHK_OPT_IMPLICIT);
3535 LIST_ADD(px->tcpcheck_rules.list, &chk->list);
3536 }
3537
3538 /* Remove all comment rules. To do so, when a such rule is found, the
3539 * comment is assigned to the following rule(s).
3540 */
3541 list_for_each_entry_safe(chk, back, px->tcpcheck_rules.list, list) {
3542 if (chk->action != prev_action && prev_action != TCPCHK_ACT_COMMENT) {
3543 free(comment);
3544 comment = NULL;
3545 }
3546
3547 prev_action = chk->action;
3548 switch (chk->action) {
3549 case TCPCHK_ACT_COMMENT:
3550 free(comment);
3551 comment = chk->comment;
3552 LIST_DEL(&chk->list);
3553 free(chk);
3554 break;
3555 case TCPCHK_ACT_CONNECT:
3556 if (!chk->comment && comment)
3557 chk->comment = strdup(comment);
Tim Duesterhus588b3142020-05-29 14:35:51 +02003558 /* fall through */
Willy Tarreau51cd5952020-06-05 12:25:38 +02003559 case TCPCHK_ACT_ACTION_KW:
3560 free(comment);
3561 comment = NULL;
3562 break;
3563 case TCPCHK_ACT_SEND:
3564 case TCPCHK_ACT_EXPECT:
3565 if (!chk->comment && comment)
3566 chk->comment = strdup(comment);
3567 break;
3568 }
3569 }
3570 free(comment);
3571 comment = NULL;
3572
3573 out:
3574 return ret;
3575}
3576
3577void deinit_proxy_tcpcheck(struct proxy *px)
3578{
3579 free_tcpcheck_vars(&px->tcpcheck_rules.preset_vars);
3580 px->tcpcheck_rules.flags = 0;
3581 px->tcpcheck_rules.list = NULL;
3582}
3583
3584static void deinit_tcpchecks()
3585{
3586 struct tcpcheck_ruleset *rs;
3587 struct tcpcheck_rule *r, *rb;
3588 struct ebpt_node *node, *next;
3589
3590 node = ebpt_first(&shared_tcpchecks);
3591 while (node) {
3592 next = ebpt_next(node);
3593 ebpt_delete(node);
3594 free(node->key);
3595 rs = container_of(node, typeof(*rs), node);
3596 list_for_each_entry_safe(r, rb, &rs->rules, list) {
3597 LIST_DEL(&r->list);
3598 free_tcpcheck(r, 0);
3599 }
3600 free(rs);
3601 node = next;
3602 }
3603}
3604
3605int add_tcpcheck_expect_str(struct tcpcheck_rules *rules, const char *str)
3606{
3607 struct tcpcheck_rule *tcpcheck, *prev_check;
3608 struct tcpcheck_expect *expect;
3609
3610 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
3611 return 0;
3612 memset(tcpcheck, 0, sizeof(*tcpcheck));
3613 tcpcheck->action = TCPCHK_ACT_EXPECT;
3614
3615 expect = &tcpcheck->expect;
3616 expect->type = TCPCHK_EXPECT_STRING;
3617 LIST_INIT(&expect->onerror_fmt);
3618 LIST_INIT(&expect->onsuccess_fmt);
3619 expect->ok_status = HCHK_STATUS_L7OKD;
3620 expect->err_status = HCHK_STATUS_L7RSP;
3621 expect->tout_status = HCHK_STATUS_L7TOUT;
3622 expect->data = ist2(strdup(str), strlen(str));
3623 if (!isttest(expect->data)) {
3624 pool_free(pool_head_tcpcheck_rule, tcpcheck);
3625 return 0;
3626 }
3627
3628 /* All tcp-check expect points back to the first inverse expect rule
3629 * in a chain of one or more expect rule, potentially itself.
3630 */
3631 tcpcheck->expect.head = tcpcheck;
3632 list_for_each_entry_rev(prev_check, rules->list, list) {
3633 if (prev_check->action == TCPCHK_ACT_EXPECT) {
3634 if (prev_check->expect.flags & TCPCHK_EXPT_FL_INV)
3635 tcpcheck->expect.head = prev_check;
3636 continue;
3637 }
3638 if (prev_check->action != TCPCHK_ACT_COMMENT && prev_check->action != TCPCHK_ACT_ACTION_KW)
3639 break;
3640 }
3641 LIST_ADDQ(rules->list, &tcpcheck->list);
3642 return 1;
3643}
3644
3645int add_tcpcheck_send_strs(struct tcpcheck_rules *rules, const char * const *strs)
3646{
3647 struct tcpcheck_rule *tcpcheck;
3648 struct tcpcheck_send *send;
3649 const char *in;
3650 char *dst;
3651 int i;
3652
3653 if ((tcpcheck = pool_alloc(pool_head_tcpcheck_rule)) == NULL)
3654 return 0;
3655 memset(tcpcheck, 0, sizeof(*tcpcheck));
3656 tcpcheck->action = TCPCHK_ACT_SEND;
3657
3658 send = &tcpcheck->send;
3659 send->type = TCPCHK_SEND_STRING;
3660
3661 for (i = 0; strs[i]; i++)
3662 send->data.len += strlen(strs[i]);
3663
3664 send->data.ptr = malloc(istlen(send->data) + 1);
3665 if (!isttest(send->data)) {
3666 pool_free(pool_head_tcpcheck_rule, tcpcheck);
3667 return 0;
3668 }
3669
3670 dst = istptr(send->data);
3671 for (i = 0; strs[i]; i++)
3672 for (in = strs[i]; (*dst = *in++); dst++);
3673 *dst = 0;
3674
3675 LIST_ADDQ(rules->list, &tcpcheck->list);
3676 return 1;
3677}
3678
3679/* Parses the "tcp-check" proxy keyword */
3680static int proxy_parse_tcpcheck(char **args, int section, struct proxy *curpx,
3681 struct proxy *defpx, const char *file, int line,
3682 char **errmsg)
3683{
3684 struct tcpcheck_ruleset *rs = NULL;
3685 struct tcpcheck_rule *chk = NULL;
3686 int index, cur_arg, ret = 0;
3687
3688 if (warnifnotcap(curpx, PR_CAP_BE, file, line, args[0], NULL))
3689 ret = 1;
3690
3691 /* Deduce the ruleset name from the proxy info */
3692 chunk_printf(&trash, "*tcp-check-%s_%s-%d",
3693 ((curpx == defpx) ? "defaults" : curpx->id),
3694 curpx->conf.file, curpx->conf.line);
3695
3696 rs = find_tcpcheck_ruleset(b_orig(&trash));
3697 if (rs == NULL) {
3698 rs = create_tcpcheck_ruleset(b_orig(&trash));
3699 if (rs == NULL) {
3700 memprintf(errmsg, "out of memory.\n");
3701 goto error;
3702 }
3703 }
3704
3705 index = 0;
3706 if (!LIST_ISEMPTY(&rs->rules)) {
3707 chk = LIST_PREV(&rs->rules, typeof(chk), list);
3708 index = chk->index + 1;
3709 }
3710
3711 cur_arg = 1;
3712 if (strcmp(args[cur_arg], "connect") == 0)
3713 chk = parse_tcpcheck_connect(args, cur_arg, curpx, &rs->rules, file, line, errmsg);
3714 else if (strcmp(args[cur_arg], "send") == 0 || strcmp(args[cur_arg], "send-binary") == 0 ||
3715 strcmp(args[cur_arg], "send-lf") == 0 || strcmp(args[cur_arg], "send-binary-lf") == 0)
3716 chk = parse_tcpcheck_send(args, cur_arg, curpx, &rs->rules, file, line, errmsg);
3717 else if (strcmp(args[cur_arg], "expect") == 0)
3718 chk = parse_tcpcheck_expect(args, cur_arg, curpx, &rs->rules, 0, file, line, errmsg);
3719 else if (strcmp(args[cur_arg], "comment") == 0)
3720 chk = parse_tcpcheck_comment(args, cur_arg, curpx, &rs->rules, file, line, errmsg);
3721 else {
3722 struct action_kw *kw = action_kw_tcp_check_lookup(args[cur_arg]);
3723
3724 if (!kw) {
3725 action_kw_tcp_check_build_list(&trash);
3726 memprintf(errmsg, "'%s' only supports 'comment', 'connect', 'send', 'send-binary', 'expect'"
3727 "%s%s. but got '%s'",
3728 args[0], (*trash.area ? ", " : ""), trash.area, args[1]);
3729 goto error;
3730 }
3731 chk = parse_tcpcheck_action(args, cur_arg, curpx, &rs->rules, kw, file, line, errmsg);
3732 }
3733
3734 if (!chk) {
3735 memprintf(errmsg, "'%s %s' : %s.", args[0], args[1], *errmsg);
3736 goto error;
3737 }
3738 ret = (ret || (*errmsg != NULL)); /* Handle warning */
3739
3740 /* No error: add the tcp-check rule in the list */
3741 chk->index = index;
3742 LIST_ADDQ(&rs->rules, &chk->list);
3743
3744 if ((curpx->options2 & PR_O2_CHK_ANY) == PR_O2_TCPCHK_CHK &&
3745 (curpx->tcpcheck_rules.flags & TCPCHK_RULES_PROTO_CHK) == TCPCHK_RULES_TCP_CHK) {
3746 /* Use this ruleset if the proxy already has tcp-check enabled */
3747 curpx->tcpcheck_rules.list = &rs->rules;
3748 curpx->tcpcheck_rules.flags &= ~TCPCHK_RULES_UNUSED_TCP_RS;
3749 }
3750 else {
3751 /* mark this ruleset as unused for now */
3752 curpx->tcpcheck_rules.flags |= TCPCHK_RULES_UNUSED_TCP_RS;
3753 }
3754
3755 return ret;
3756
3757 error:
3758 free_tcpcheck(chk, 0);
3759 free_tcpcheck_ruleset(rs);
3760 return -1;
3761}
3762
3763static struct cfg_kw_list cfg_kws = {ILH, {
3764 { CFG_LISTEN, "tcp-check", proxy_parse_tcpcheck },
3765 { 0, NULL, NULL },
3766}};
3767
3768REGISTER_POST_PROXY_CHECK(check_proxy_tcpcheck);
3769REGISTER_PROXY_DEINIT(deinit_proxy_tcpcheck);
3770REGISTER_POST_DEINIT(deinit_tcpchecks);
3771INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);