1 /* Copyright 1999-2004 The Apache Software Foundation
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 /* Utility routines for Apache proxy */
17 #include "mod_proxy.h"
19 #include "apr_version.h"
22 #include <unistd.h> /* for getpid() */
25 #if (APR_MAJOR_VERSION < 1)
26 #undef apr_socket_create
27 #define apr_socket_create apr_socket_create_ex
30 /* Global balancer counter */
31 static int lb_workers = 0;
32 static int lb_workers_limit = 0;
34 static int proxy_match_ipaddr(struct dirconn_entry *This, request_rec *r);
35 static int proxy_match_domainname(struct dirconn_entry *This, request_rec *r);
36 static int proxy_match_hostname(struct dirconn_entry *This, request_rec *r);
37 static int proxy_match_word(struct dirconn_entry *This, request_rec *r);
39 APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, create_req,
40 (request_rec *r, request_rec *pr), (r, pr),
43 /* already called in the knowledge that the characters are hex digits */
44 PROXY_DECLARE(int) ap_proxy_hex2c(const char *x)
48 #if !APR_CHARSET_EBCDIC
52 else if (apr_isupper(ch))
61 else if (apr_isupper(ch))
66 #else /*APR_CHARSET_EBCDIC*/
67 /* we assume that the hex value refers to an ASCII character
68 * so convert to EBCDIC so that it makes sense locally;
72 * client specifies %20 in URL to refer to a space char;
73 * at this point we're called with EBCDIC "20"; after turning
74 * EBCDIC "20" into binary 0x20, we then need to assume that 0x20
75 * represents an ASCII char and convert 0x20 to EBCDIC, yielding
80 if (1 == sscanf(x, "%2x", &i)) {
82 ap_xlate_proto_from_ascii(buf, 1);
88 #endif /*APR_CHARSET_EBCDIC*/
91 PROXY_DECLARE(void) ap_proxy_c2hex(int ch, char *x)
93 #if !APR_CHARSET_EBCDIC
99 x[1] = ('A' - 10) + i;
105 x[2] = ('A' - 10) + i;
108 #else /*APR_CHARSET_EBCDIC*/
109 static const char ntoa[] = { "0123456789ABCDEF" };
115 ap_xlate_proto_to_ascii(buf, 1);
118 x[1] = ntoa[(buf[0] >> 4) & 0x0F];
119 x[2] = ntoa[buf[0] & 0x0F];
121 #endif /*APR_CHARSET_EBCDIC*/
125 * canonicalise a URL-encoded string
129 * Convert a URL-encoded string to canonical form.
130 * It decodes characters which need not be encoded,
131 * and encodes those which must be encoded, and does not touch
132 * those which must not be touched.
134 PROXY_DECLARE(char *)ap_proxy_canonenc(apr_pool_t *p, const char *x, int len, enum enctype t,
139 char *allowed; /* characters which should not be encoded */
140 char *reserved; /* characters which much not be en/de-coded */
142 /* N.B. in addition to :@&=, this allows ';' in an http path
143 * and '?' in an ftp path -- this may be revised
145 * Also, it makes a '+' character in a search string reserved, as
146 * it may be form-encoded. (Although RFC 1738 doesn't allow this -
147 * it only permits ; / ? : @ = & as reserved chars.)
150 allowed = "$-_.+!*'(),;:@&=";
151 else if (t == enc_search)
152 allowed = "$-_.!*'(),;:@&=";
153 else if (t == enc_user)
154 allowed = "$-_.+!*'(),;@&=";
155 else if (t == enc_fpath)
156 allowed = "$-_.+!*'(),?:@&=";
157 else /* if (t == enc_parm) */
158 allowed = "$-_.+!*'(),?/:@&=";
162 else if (t == enc_search)
167 y = apr_palloc(p, 3 * len + 1);
169 for (i = 0, j = 0; i < len; i++, j++) {
170 /* always handle '/' first */
172 if (strchr(reserved, ch)) {
176 /* decode it if not already done */
177 if (isenc && ch == '%') {
178 if (!apr_isxdigit(x[i + 1]) || !apr_isxdigit(x[i + 2]))
180 ch = ap_proxy_hex2c(&x[i + 1]);
182 if (ch != 0 && strchr(reserved, ch)) { /* keep it encoded */
183 ap_proxy_c2hex(ch, &y[j]);
188 /* recode it, if necessary */
189 if (!apr_isalnum(ch) && !strchr(allowed, ch)) {
190 ap_proxy_c2hex(ch, &y[j]);
201 * Parses network-location.
202 * urlp on input the URL; on output the path, after the leading /
203 * user NULL if no user/password permitted
204 * password holder for password
205 * host holder for host
206 * port port number; only set if one is supplied.
208 * Returns an error string.
210 PROXY_DECLARE(char *)
211 ap_proxy_canon_netloc(apr_pool_t *p, char **const urlp, char **userp,
212 char **passwordp, char **hostp, apr_port_t *port)
214 char *addr, *scope_id, *strp, *host, *url = *urlp;
215 char *user = NULL, *password = NULL;
219 if (url[0] != '/' || url[1] != '/')
220 return "Malformed URL";
222 url = strchr(host, '/');
226 *(url++) = '\0'; /* skip seperating '/' */
228 /* find _last_ '@' since it might occur in user/password part */
229 strp = strrchr(host, '@');
237 strp = strchr(user, ':');
240 password = ap_proxy_canonenc(p, strp + 1, strlen(strp + 1), enc_user, 1);
241 if (password == NULL)
242 return "Bad %-escape in URL (password)";
245 user = ap_proxy_canonenc(p, user, strlen(user), enc_user, 1);
247 return "Bad %-escape in URL (username)";
252 if (passwordp != NULL) {
253 *passwordp = password;
256 /* Parse the host string to separate host portion from optional port.
257 * Perform range checking on port.
259 rv = apr_parse_addr_port(&addr, &scope_id, &tmp_port, host, p);
260 if (rv != APR_SUCCESS || addr == NULL || scope_id != NULL) {
261 return "Invalid host/port";
263 if (tmp_port != 0) { /* only update caller's port if port was specified */
267 ap_str_tolower(addr); /* DNS names are case-insensitive */
275 static const char * const lwday[7] =
276 {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
279 * If the date is a valid RFC 850 date or asctime() date, then it
280 * is converted to the RFC 1123 format, otherwise it is not modified.
281 * This routine is not very fast at doing conversions, as it uses
282 * sscanf and sprintf. However, if the date is already correctly
283 * formatted, then it exits very quickly.
285 PROXY_DECLARE(const char *)
286 ap_proxy_date_canon(apr_pool_t *p, const char *x1)
288 char *x = apr_pstrdup(p, x1);
289 int wk, mday, year, hour, min, sec, mon;
290 char *q, month[4], zone[4], week[4];
293 /* check for RFC 850 date */
294 if (q != NULL && q - x > 3 && q[1] == ' ') {
296 for (wk = 0; wk < 7; wk++)
297 if (strcmp(x, lwday[wk]) == 0)
301 return x; /* not a valid date */
302 if (q[4] != '-' || q[8] != '-' || q[11] != ' ' || q[14] != ':' ||
303 q[17] != ':' || strcmp(&q[20], " GMT") != 0)
305 if (sscanf(q + 2, "%u-%3s-%u %u:%u:%u %3s", &mday, month, &year,
306 &hour, &min, &sec, zone) != 7)
314 /* check for acstime() date */
315 if (x[3] != ' ' || x[7] != ' ' || x[10] != ' ' || x[13] != ':' ||
316 x[16] != ':' || x[19] != ' ' || x[24] != '\0')
318 if (sscanf(x, "%3s %3s %u %u:%u:%u %u", week, month, &mday, &hour,
319 &min, &sec, &year) != 7)
321 for (wk = 0; wk < 7; wk++)
322 if (strcmp(week, apr_day_snames[wk]) == 0)
329 for (mon = 0; mon < 12; mon++)
330 if (strcmp(month, apr_month_snames[mon]) == 0)
335 q = apr_palloc(p, 30);
336 apr_snprintf(q, 30, "%s, %.2d %s %d %.2d:%.2d:%.2d GMT", apr_day_snames[wk],
337 mday, apr_month_snames[mon], year, hour, min, sec);
341 PROXY_DECLARE(request_rec *)ap_proxy_make_fake_req(conn_rec *c, request_rec *r)
343 request_rec *rp = apr_pcalloc(c->pool, sizeof(*r));
346 rp->status = HTTP_OK;
348 rp->headers_in = apr_table_make(c->pool, 50);
349 rp->subprocess_env = apr_table_make(c->pool, 50);
350 rp->headers_out = apr_table_make(c->pool, 12);
351 rp->err_headers_out = apr_table_make(c->pool, 5);
352 rp->notes = apr_table_make(c->pool, 5);
354 rp->server = r->server;
355 rp->proxyreq = r->proxyreq;
356 rp->request_time = r->request_time;
358 rp->output_filters = c->output_filters;
359 rp->input_filters = c->input_filters;
360 rp->proto_output_filters = c->output_filters;
361 rp->proto_input_filters = c->input_filters;
363 rp->request_config = ap_create_request_config(c->pool);
364 proxy_run_create_req(r, rp);
371 * list is a comma-separated list of case-insensitive tokens, with
372 * optional whitespace around the tokens.
373 * The return returns 1 if the token val is found in the list, or 0
376 PROXY_DECLARE(int) ap_proxy_liststr(const char *list, const char *val)
383 while (list != NULL) {
384 p = ap_strchr_c(list, ',');
389 while (apr_isspace(*p));
394 while (i > 0 && apr_isspace(list[i - 1]))
396 if (i == len && strncasecmp(list, val, len) == 0)
404 * list is a comma-separated list of case-insensitive tokens, with
405 * optional whitespace around the tokens.
406 * if val appears on the list of tokens, it is removed from the list,
407 * and the new list is returned.
409 PROXY_DECLARE(char *)ap_proxy_removestr(apr_pool_t *pool, const char *list, const char *val)
417 while (list != NULL) {
418 p = ap_strchr_c(list, ',');
423 while (apr_isspace(*p));
428 while (i > 0 && apr_isspace(list[i - 1]))
430 if (i == len && strncasecmp(list, val, len) == 0) {
435 new = apr_pstrcat(pool, new, ",", apr_pstrndup(pool, list, i), NULL);
437 new = apr_pstrndup(pool, list, i);
445 * Converts 8 hex digits to a time integer
447 PROXY_DECLARE(int) ap_proxy_hex2sec(const char *x)
452 for (i = 0, j = 0; i < 8; i++) {
457 else if (apr_isupper(ch))
458 j |= ch - ('A' - 10);
460 j |= ch - ('a' - 10);
463 return -1; /* so that it works with 8-byte ints */
469 * Converts a time integer to 8 hex digits
471 PROXY_DECLARE(void) ap_proxy_sec2hex(int t, char *y)
476 for (i = 7; i >= 0; i--) {
480 y[i] = ch + ('A' - 10);
487 PROXY_DECLARE(int) ap_proxyerror(request_rec *r, int statuscode, const char *message)
489 apr_table_setn(r->notes, "error-notes",
491 "The proxy server could not handle the request "
492 "<em><a href=\"", ap_escape_uri(r->pool, r->uri),
493 "\">", ap_escape_html(r->pool, r->method),
495 ap_escape_html(r->pool, r->uri), "</a></em>.<p>\n"
497 ap_escape_html(r->pool, message),
498 "</strong></p>", NULL));
500 /* Allow "error-notes" string to be printed by ap_send_error_response() */
501 apr_table_setn(r->notes, "verbose-error-to", apr_pstrdup(r->pool, "*"));
503 r->status_line = apr_psprintf(r->pool, "%3.3u Proxy Error", statuscode);
504 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
505 "proxy: %s returned by %s", message, r->uri);
510 proxy_get_host_of_request(request_rec *r)
512 char *url, *user = NULL, *password = NULL, *err, *host;
515 if (r->hostname != NULL)
518 /* Set url to the first char after "scheme://" */
519 if ((url = strchr(r->uri, ':')) == NULL
520 || url[1] != '/' || url[2] != '/')
523 url = apr_pstrdup(r->pool, &url[1]); /* make it point to "//", which is what proxy_canon_netloc expects */
525 err = ap_proxy_canon_netloc(r->pool, &url, &user, &password, &host, &port);
528 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
533 return host; /* ought to return the port, too */
536 /* Return TRUE if addr represents an IP address (or an IP network address) */
537 PROXY_DECLARE(int) ap_proxy_is_ipaddr(struct dirconn_entry *This, apr_pool_t *p)
539 const char *addr = This->name;
544 /* if the address is given with an explicit netmask, use that */
545 /* Due to a deficiency in apr_inet_addr(), it is impossible to parse */
546 /* "partial" addresses (with less than 4 quads) correctly, i.e. */
547 /* 192.168.123 is parsed as 192.168.0.123, which is not what I want. */
548 /* I therefore have to parse the IP address manually: */
549 /*if (proxy_readmask(This->name, &This->addr.s_addr, &This->mask.s_addr) == 0) */
550 /* addr and mask were set by proxy_readmask() */
553 /* Parse IP addr manually, optionally allowing */
554 /* abbreviated net addresses like 192.168. */
556 /* Iterate over up to 4 (dotted) quads. */
557 for (quads = 0; quads < 4 && *addr != '\0'; ++quads) {
560 if (*addr == '/' && quads > 0) /* netmask starts here. */
563 if (!apr_isdigit(*addr))
564 return 0; /* no digit at start of quad */
566 ip_addr[quads] = strtol(addr, &tmp, 0);
568 if (tmp == addr) /* expected a digit, found something else */
571 if (ip_addr[quads] < 0 || ip_addr[quads] > 255) {
578 if (*addr == '.' && quads != 3)
579 ++addr; /* after the 4th quad, a dot would be illegal */
582 for (This->addr.s_addr = 0, i = 0; i < quads; ++i)
583 This->addr.s_addr |= htonl(ip_addr[i] << (24 - 8 * i));
585 if (addr[0] == '/' && apr_isdigit(addr[1])) { /* net mask follows: */
590 bits = strtol(addr, &tmp, 0);
592 if (tmp == addr) /* expected a digit, found something else */
597 if (bits < 0 || bits > 32) /* netmask must be between 0 and 32 */
602 /* Determine (i.e., "guess") netmask by counting the */
603 /* number of trailing .0's; reduce #quads appropriately */
604 /* (so that 192.168.0.0 is equivalent to 192.168.) */
605 while (quads > 0 && ip_addr[quads - 1] == 0)
608 /* "IP Address should be given in dotted-quad form, optionally followed by a netmask (e.g., 192.168.111.0/24)"; */
612 /* every zero-byte counts as 8 zero-bits */
615 if (bits != 32) /* no warning for fully qualified IP address */
616 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
617 "Warning: NetMask not supplied with IP-Addr; guessing: %s/%ld\n",
618 inet_ntoa(This->addr), bits);
621 This->mask.s_addr = htonl(APR_INADDR_NONE << (32 - bits));
623 if (*addr == '\0' && (This->addr.s_addr & ~This->mask.s_addr) != 0) {
624 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
625 "Warning: NetMask and IP-Addr disagree in %s/%ld\n",
626 inet_ntoa(This->addr), bits);
627 This->addr.s_addr &= This->mask.s_addr;
628 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
630 inet_ntoa(This->addr), bits);
634 This->matcher = proxy_match_ipaddr;
638 return (*addr == '\0'); /* okay iff we've parsed the whole string */
641 /* Return TRUE if addr represents an IP address (or an IP network address) */
642 static int proxy_match_ipaddr(struct dirconn_entry *This, request_rec *r)
645 struct in_addr addr, *ip;
646 const char *host = proxy_get_host_of_request(r);
648 if (host == NULL) /* oops! */
651 memset(&addr, '\0', sizeof addr);
652 memset(ip_addr, '\0', sizeof ip_addr);
654 if (4 == sscanf(host, "%d.%d.%d.%d", &ip_addr[0], &ip_addr[1], &ip_addr[2], &ip_addr[3])) {
655 for (addr.s_addr = 0, i = 0; i < 4; ++i)
656 addr.s_addr |= htonl(ip_addr[i] << (24 - 8 * i));
658 if (This->addr.s_addr == (addr.s_addr & This->mask.s_addr)) {
660 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
661 "1)IP-Match: %s[%s] <-> ", host, inet_ntoa(addr));
662 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
663 "%s/", inet_ntoa(This->addr));
664 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
665 "%s", inet_ntoa(This->mask));
671 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
672 "1)IP-NoMatch: %s[%s] <-> ", host, inet_ntoa(addr));
673 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
674 "%s/", inet_ntoa(This->addr));
675 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
676 "%s", inet_ntoa(This->mask));
681 struct apr_sockaddr_t *reqaddr;
683 if (apr_sockaddr_info_get(&reqaddr, host, APR_UNSPEC, 0, 0, r->pool)
686 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
687 "2)IP-NoMatch: hostname=%s msg=Host not found",
693 /* Try to deal with multiple IP addr's for a host */
694 /* FIXME: This needs to be able to deal with IPv6 */
696 ip = (struct in_addr *) reqaddr->ipaddr_ptr;
697 if (This->addr.s_addr == (ip->s_addr & This->mask.s_addr)) {
699 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
700 "3)IP-Match: %s[%s] <-> ", host,
702 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
703 "%s/", inet_ntoa(This->addr));
704 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
705 "%s", inet_ntoa(This->mask));
711 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
712 "3)IP-NoMatch: %s[%s] <-> ", host,
714 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
715 "%s/", inet_ntoa(This->addr));
716 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
717 "%s", inet_ntoa(This->mask));
720 reqaddr = reqaddr->next;
727 /* Return TRUE if addr represents a domain name */
728 PROXY_DECLARE(int) ap_proxy_is_domainname(struct dirconn_entry *This, apr_pool_t *p)
730 char *addr = This->name;
733 /* Domain name must start with a '.' */
737 /* rfc1035 says DNS names must consist of "[-a-zA-Z0-9]" and '.' */
738 for (i = 0; apr_isalnum(addr[i]) || addr[i] == '-' || addr[i] == '.'; ++i)
742 if (addr[i] == ':') {
743 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
744 "@@@@ handle optional port in proxy_is_domainname()");
745 /* @@@@ handle optional port */
752 /* Strip trailing dots */
753 for (i = strlen(addr) - 1; i > 0 && addr[i] == '.'; --i)
756 This->matcher = proxy_match_domainname;
760 /* Return TRUE if host "host" is in domain "domain" */
761 static int proxy_match_domainname(struct dirconn_entry *This, request_rec *r)
763 const char *host = proxy_get_host_of_request(r);
764 int d_len = strlen(This->name), h_len;
766 if (host == NULL) /* some error was logged already */
769 h_len = strlen(host);
771 /* @@@ do this within the setup? */
772 /* Ignore trailing dots in domain comparison: */
773 while (d_len > 0 && This->name[d_len - 1] == '.')
775 while (h_len > 0 && host[h_len - 1] == '.')
778 && strncasecmp(&host[h_len - d_len], This->name, d_len) == 0;
781 /* Return TRUE if host represents a host name */
782 PROXY_DECLARE(int) ap_proxy_is_hostname(struct dirconn_entry *This, apr_pool_t *p)
784 struct apr_sockaddr_t *addr;
785 char *host = This->name;
788 /* Host names must not start with a '.' */
792 /* rfc1035 says DNS names must consist of "[-a-zA-Z0-9]" and '.' */
793 for (i = 0; apr_isalnum(host[i]) || host[i] == '-' || host[i] == '.'; ++i);
795 if (host[i] != '\0' || apr_sockaddr_info_get(&addr, host, APR_UNSPEC, 0, 0, p) != APR_SUCCESS)
798 This->hostaddr = addr;
800 /* Strip trailing dots */
801 for (i = strlen(host) - 1; i > 0 && host[i] == '.'; --i)
804 This->matcher = proxy_match_hostname;
808 /* Return TRUE if host "host" is equal to host2 "host2" */
809 static int proxy_match_hostname(struct dirconn_entry *This, request_rec *r)
811 char *host = This->name;
812 const char *host2 = proxy_get_host_of_request(r);
816 if (host == NULL || host2 == NULL)
817 return 0; /* oops! */
819 h2_len = strlen(host2);
820 h1_len = strlen(host);
823 struct apr_sockaddr_t *addr = *This->hostaddr;
825 /* Try to deal with multiple IP addr's for a host */
827 if (addr->ipaddr_ptr == ? ? ? ? ? ? ? ? ? ? ? ? ?)
833 /* Ignore trailing dots in host2 comparison: */
834 while (h2_len > 0 && host2[h2_len - 1] == '.')
836 while (h1_len > 0 && host[h1_len - 1] == '.')
838 return h1_len == h2_len
839 && strncasecmp(host, host2, h1_len) == 0;
842 /* Return TRUE if addr is to be matched as a word */
843 PROXY_DECLARE(int) ap_proxy_is_word(struct dirconn_entry *This, apr_pool_t *p)
845 This->matcher = proxy_match_word;
849 /* Return TRUE if string "str2" occurs literally in "str1" */
850 static int proxy_match_word(struct dirconn_entry *This, request_rec *r)
852 const char *host = proxy_get_host_of_request(r);
853 return host != NULL && ap_strstr_c(host, This->name) != NULL;
856 /* checks whether a host in uri_addr matches proxyblock */
857 PROXY_DECLARE(int) ap_proxy_checkproxyblock(request_rec *r, proxy_server_conf *conf,
858 apr_sockaddr_t *uri_addr)
861 apr_sockaddr_t * src_uri_addr = uri_addr;
862 /* XXX FIXME: conf->noproxies->elts is part of an opaque structure */
863 for (j = 0; j < conf->noproxies->nelts; j++) {
864 struct noproxy_entry *npent = (struct noproxy_entry *) conf->noproxies->elts;
865 struct apr_sockaddr_t *conf_addr = npent[j].addr;
866 uri_addr = src_uri_addr;
867 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
868 "proxy: checking remote machine [%s] against [%s]", uri_addr->hostname, npent[j].name);
869 if ((npent[j].name && ap_strstr_c(uri_addr->hostname, npent[j].name))
870 || npent[j].name[0] == '*') {
871 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server,
872 "proxy: connect to remote machine %s blocked: name %s matched", uri_addr->hostname, npent[j].name);
873 return HTTP_FORBIDDEN;
879 apr_sockaddr_ip_get(&conf_ip, conf_addr);
880 apr_sockaddr_ip_get(&uri_ip, uri_addr);
881 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
882 "proxy: ProxyBlock comparing %s and %s", conf_ip, uri_ip);
883 if (!apr_strnatcasecmp(conf_ip, uri_ip)) {
884 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server,
885 "proxy: connect to remote machine %s blocked: IP %s matched", uri_addr->hostname, conf_ip);
886 return HTTP_FORBIDDEN;
888 uri_addr = uri_addr->next;
890 conf_addr = conf_addr->next;
896 /* set up the minimal filter set */
897 PROXY_DECLARE(int) ap_proxy_pre_http_request(conn_rec *c, request_rec *r)
899 ap_add_input_filter("HTTP_IN", NULL, r, c);
903 /* converts a series of buckets into a string
904 * XXX: BillS says this function performs essentially the same function as
905 * ap_rgetline() in protocol.c. Deprecate this function and use ap_rgetline()
906 * instead? I think ap_proxy_string_read() will not work properly on non ASCII
907 * (EBCDIC) machines either.
909 PROXY_DECLARE(apr_status_t) ap_proxy_string_read(conn_rec *c, apr_bucket_brigade *bb,
910 char *buff, apr_size_t bufflen, int *eos)
919 /* start with an empty string */
923 /* loop through each brigade */
925 /* get brigade from network one line at a time */
926 if (APR_SUCCESS != (rv = ap_get_brigade(c->input_filters, bb,
932 /* loop through each bucket */
934 if (*eos || APR_BRIGADE_EMPTY(bb)) {
935 /* The connection aborted or timed out */
936 return APR_ECONNABORTED;
938 e = APR_BRIGADE_FIRST(bb);
939 if (APR_BUCKET_IS_EOS(e)) {
943 if (APR_SUCCESS != apr_bucket_read(e, (const char **)&response, &len, APR_BLOCK_READ)) {
946 /* is string LF terminated?
947 * XXX: This check can be made more efficient by simply checking
948 * if the last character in the 'response' buffer is an ASCII_LF.
949 * See ap_rgetline() for an example.
951 if (memchr(response, APR_ASCII_LF, len)) {
954 /* concat strings until buff is full - then throw the data away */
955 if (len > ((bufflen-1)-(pos-buff))) {
956 len = (bufflen-1)-(pos-buff);
959 pos = apr_cpystrn(pos, response, len);
962 APR_BUCKET_REMOVE(e);
963 apr_bucket_destroy(e);
970 /* unmerge an element in the table */
971 PROXY_DECLARE(void) ap_proxy_table_unmerge(apr_pool_t *p, apr_table_t *t, char *key)
973 apr_off_t offset = 0;
977 /* get the value to unmerge */
978 const char *initial = apr_table_get(t, key);
982 value = apr_pstrdup(p, initial);
984 /* remove the value from the headers */
985 apr_table_unset(t, key);
987 /* find each comma */
988 while (value[count]) {
989 if (value[count] == ',') {
991 apr_table_add(t, key, value + offset);
996 apr_table_add(t, key, value + offset);
999 PROXY_DECLARE(proxy_balancer *) ap_proxy_get_balancer(apr_pool_t *p,
1000 proxy_server_conf *conf,
1003 proxy_balancer *balancer;
1004 char *c, *uri = apr_pstrdup(p, url);
1007 c = strchr(uri, ':');
1008 if (c == NULL || c[1] != '/' || c[2] != '/' || c[3] == '\0')
1010 /* remove path from uri */
1011 if ((c = strchr(c + 3, '/')))
1013 balancer = (proxy_balancer *)conf->balancers->elts;
1014 for (i = 0; i < conf->balancers->nelts; i++) {
1015 if (strcasecmp(balancer->name, uri) == 0)
1022 PROXY_DECLARE(const char *) ap_proxy_add_balancer(proxy_balancer **balancer,
1024 proxy_server_conf *conf,
1027 char *c, *q, *uri = apr_pstrdup(p, url);
1029 c = strchr(uri, ':');
1030 if (c == NULL || c[1] != '/' || c[2] != '/' || c[3] == '\0')
1031 return "Bad syntax for a balancer name";
1032 /* remove path from uri */
1033 if ((q = strchr(c + 3, '/')))
1036 ap_str_tolower(uri);
1037 *balancer = apr_array_push(conf->balancers);
1038 memset(*balancer, 0, sizeof(proxy_balancer));
1040 (*balancer)->name = uri;
1041 (*balancer)->workers = apr_array_make(p, 5, sizeof(proxy_runtime_worker));
1042 /* XXX Is this a right place to create mutex */
1044 if (apr_thread_mutex_create(&((*balancer)->mutex),
1045 APR_THREAD_MUTEX_DEFAULT, p) != APR_SUCCESS) {
1046 /* XXX: Do we need to log something here */
1047 return "can not create thread mutex";
1054 PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker(apr_pool_t *p,
1055 proxy_server_conf *conf,
1058 proxy_worker *worker;
1059 char *c, *uri = apr_pstrdup(p, url);
1062 c = strchr(uri, ':');
1063 if (c == NULL || c[1] != '/' || c[2] != '/' || c[3] == '\0')
1065 /* remove path from uri */
1066 if ((c = strchr(c + 3, '/')))
1069 worker = (proxy_worker *)conf->workers->elts;
1070 for (i = 0; i < conf->workers->nelts; i++) {
1071 if (strcasecmp(worker->name, uri) == 0) {
1080 static apr_status_t conn_pool_cleanup(void *theworker)
1082 proxy_worker *worker = (proxy_worker *)theworker;
1083 if (worker->cp->res) {
1084 worker->cp->pool = NULL;
1085 apr_reslist_destroy(worker->cp->res);
1091 static void init_conn_pool(apr_pool_t *p, proxy_worker *worker)
1094 proxy_conn_pool *cp;
1096 /* Create a connection pool's subpool.
1097 * This pool is used for connection recycling.
1098 * Once the worker is added it is never removed but
1099 * it can be disabled.
1101 apr_pool_create(&pool, p);
1102 /* Alloc from the same pool as worker.
1103 * proxy_conn_pool is permanently attached to the worker.
1105 cp = (proxy_conn_pool *)apr_pcalloc(p, sizeof(proxy_conn_pool));
1110 PROXY_DECLARE(const char *) ap_proxy_add_worker(proxy_worker **worker,
1112 proxy_server_conf *conf,
1115 char *c, *q, *uri = apr_pstrdup(p, url);
1118 c = strchr(uri, ':');
1119 if (c == NULL || c[1] != '/' || c[2] != '/' || c[3] == '\0')
1120 return "Bad syntax for a remote proxy server";
1121 /* remove path from uri */
1122 if ((q = strchr(c + 3, '/')))
1125 q = strchr(c + 3, ':');
1127 if (sscanf(q + 1, "%u", &port) != 1 || port > 65535) {
1128 return "Bad syntax for a remote proxy server (bad port number)";
1133 ap_str_tolower(uri);
1134 *worker = apr_array_push(conf->workers);
1135 memset(*worker, 0, sizeof(proxy_worker));
1136 (*worker)->name = apr_pstrdup(p, uri);
1138 (*worker)->scheme = uri;
1139 (*worker)->hostname = c + 3;
1142 port = apr_uri_port_of_scheme((*worker)->scheme);
1143 (*worker)->port = port;
1145 init_conn_pool(p, *worker);
1150 PROXY_DECLARE(proxy_worker *) ap_proxy_create_worker(apr_pool_t *p)
1153 proxy_worker *worker;
1154 worker = (proxy_worker *)apr_pcalloc(p, sizeof(proxy_worker));
1155 init_conn_pool(p, worker);
1161 ap_proxy_add_worker_to_balancer(apr_pool_t *pool, proxy_balancer *balancer, proxy_worker *worker)
1163 proxy_runtime_worker *runtime;
1165 #if PROXY_HAS_SCOREBOARD
1168 ap_mpm_query(AP_MPMQ_HARD_LIMIT_DAEMONS, &mpm_daemons);
1169 /* Check if we are prefork or single child */
1170 if (worker->hmax && mpm_daemons > 1) {
1171 /* Check only if workers_limit is set */
1172 if (lb_workers_limit && (lb_workers + 1) > lb_workers_limit) {
1173 ap_log_perror(APLOG_MARK, APLOG_ERR, 0, pool,
1174 "proxy: Can not add worker (%s) to balancer (%s)."
1175 " Dynamic limit reached.",
1176 worker->name, balancer->name);
1181 runtime = apr_array_push(balancer->workers);
1182 runtime->w = worker;
1183 runtime->b = balancer;
1184 runtime->id = lb_workers;
1186 /* Increase the total runtime count */
1191 PROXY_DECLARE(int) ap_proxy_pre_request(proxy_worker **worker,
1192 proxy_balancer **balancer,
1194 proxy_server_conf *conf, char **url)
1198 access_status = proxy_run_pre_request(worker, balancer, r, conf, url);
1199 if (access_status == DECLINED && *balancer == NULL) {
1200 *worker = ap_proxy_get_worker(r->pool, conf, *url);
1205 else if (r->proxyreq == PROXYREQ_PROXY) {
1206 if (conf->forward) {
1208 *worker = conf->forward;
1213 else if (access_status == DECLINED && balancer != NULL) {
1214 /* All the workers are busy */
1215 access_status = HTTP_SERVICE_UNAVAILABLE;
1217 return access_status;
1220 PROXY_DECLARE(int) ap_proxy_post_request(proxy_worker *worker,
1221 proxy_balancer *balancer,
1223 proxy_server_conf *conf)
1227 access_status = proxy_run_post_request(worker, balancer, r, conf);
1234 return access_status;
1238 PROXY_DECLARE(int) ap_proxy_connect_to_backend(apr_socket_t **newsock,
1239 const char *proxy_function,
1240 apr_sockaddr_t *backend_addr,
1241 const char *backend_name,
1242 proxy_server_conf *conf,
1250 while (backend_addr && !connected) {
1251 if ((rv = apr_socket_create(newsock, backend_addr->family,
1252 SOCK_STREAM, 0, p)) != APR_SUCCESS) {
1253 loglevel = backend_addr->next ? APLOG_DEBUG : APLOG_ERR;
1254 ap_log_error(APLOG_MARK, loglevel, rv, s,
1255 "proxy: %s: error creating fam %d socket for target %s",
1257 backend_addr->family,
1259 /* this could be an IPv6 address from the DNS but the
1260 * local machine won't give us an IPv6 socket; hopefully the
1261 * DNS returned an additional address to try
1263 backend_addr = backend_addr->next;
1267 #if !defined(TPF) && !defined(BEOS)
1268 if (conf->recv_buffer_size > 0 &&
1269 (rv = apr_socket_opt_set(*newsock, APR_SO_RCVBUF,
1270 conf->recv_buffer_size))) {
1271 ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
1272 "apr_socket_opt_set(SO_RCVBUF): Failed to set "
1273 "ProxyReceiveBufferSize, using default");
1277 /* Set a timeout on the socket */
1278 if (conf->timeout_set == 1) {
1279 apr_socket_timeout_set(*newsock, conf->timeout);
1282 apr_socket_timeout_set(*newsock, s->timeout);
1285 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
1286 "proxy: %s: fam %d socket created to connect to %s",
1287 proxy_function, backend_addr->family, backend_name);
1289 /* make the connection out of the socket */
1290 rv = apr_socket_connect(*newsock, backend_addr);
1292 /* if an error occurred, loop round and try again */
1293 if (rv != APR_SUCCESS) {
1294 apr_socket_close(*newsock);
1295 loglevel = backend_addr->next ? APLOG_DEBUG : APLOG_ERR;
1296 ap_log_error(APLOG_MARK, loglevel, rv, s,
1297 "proxy: %s: attempt to connect to %pI (%s) failed",
1301 backend_addr = backend_addr->next;
1306 return connected ? 0 : 1;
1309 static apr_status_t connection_cleanup(void *theconn)
1311 proxy_conn_rec *conn = (proxy_conn_rec *)theconn;
1312 proxy_worker *worker = conn->worker;
1314 /* If the connection pool is NULL the worker
1315 * cleanup has been run. Just return.
1320 /* deterimine if the connection need to be closed */
1321 if (conn->close_on_recycle || conn->close) {
1322 apr_pool_t *p = conn->pool;
1323 apr_pool_clear(conn->pool);
1324 memset(conn, 0, sizeof(proxy_conn_rec));
1326 conn->worker = worker;
1329 if (worker->hmax && worker->cp->res) {
1330 apr_reslist_release(worker->cp->res, (void *)conn);
1335 worker->cp->conn = conn;
1338 /* Allways return the SUCCESS */
1342 /* reslist constructor */
1343 static apr_status_t connection_constructor(void **resource, void *params,
1347 proxy_conn_rec *conn;
1348 proxy_worker *worker = (proxy_worker *)params;
1350 /* Create the subpool for each connection
1351 * This keeps the memory consumption constant
1352 * when disconnecting from backend.
1354 apr_pool_create(&ctx, pool);
1355 conn = apr_pcalloc(pool, sizeof(proxy_conn_rec));
1358 conn->worker = worker;
1364 /* reslist destructor */
1365 static apr_status_t connection_destructor(void *resource, void *params,
1368 proxy_conn_rec *conn = (proxy_conn_rec *)resource;
1370 /* Destroy the pool only if not called from reslist_destroy */
1371 if (conn->worker->cp->pool)
1372 apr_pool_destroy(conn->pool);
1377 PROXY_DECLARE(apr_status_t) ap_proxy_initialize_worker(proxy_worker *worker, server_rec *s)
1384 ap_mpm_query(AP_MPMQ_MAX_THREADS, &mpm_threads);
1385 if (mpm_threads > 1) {
1386 /* Set hard max to no more then mpm_threads */
1387 if (worker->hmax == 0 || worker->hmax > mpm_threads)
1388 worker->hmax = mpm_threads;
1389 if (worker->smax == 0 || worker->smax > worker->hmax)
1390 worker->smax = worker->hmax;
1391 /* Set min to be lower then smax */
1392 if (worker->min > worker->smax)
1393 worker->min = worker->smax;
1394 worker->cp->nfree = worker->hmax;
1397 /* This will supress the apr_reslist creation */
1398 worker->min = worker->smax = worker->hmax = 0;
1401 rv = apr_reslist_create(&(worker->cp->res),
1402 worker->min, worker->smax,
1403 worker->hmax, worker->ttl,
1404 connection_constructor, connection_destructor,
1405 worker, worker->cp->pool);
1407 apr_pool_cleanup_register(worker->cp->pool, (void *)worker,
1409 apr_pool_cleanup_null);
1411 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
1412 "proxy: initialized worker for (%s) min=%d max=%d smax=%d",
1413 worker->hostname, worker->min, worker->hmax, worker->smax);
1415 #if (APR_MAJOR_VERSION > 0)
1416 /* Set the acquire timeout */
1417 if (rv == APR_SUCCESS && worker->acquire_set)
1418 apr_reslist_timeout_set(worker->cp->res, worker->acquire);
1425 rv = connection_constructor((void **)&(worker->cp->conn), worker, worker->cp->pool);
1426 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
1427 "proxy: initialized single connection worker for (%s)",
1430 if (rv == APR_SUCCESS)
1431 worker->status |= PROXY_WORKER_INITIALIZED;
1435 PROXY_DECLARE(int) ap_proxy_retry_worker(const char *proxy_function,
1436 proxy_worker *worker,
1439 if (worker->status & PROXY_WORKER_IN_ERROR) {
1440 apr_interval_time_t diff;
1441 apr_time_t now = apr_time_now();
1442 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
1443 "proxy: %s: retrying the worker for (%s)",
1444 proxy_function, worker->hostname);
1446 diff = worker->retry;
1448 /* Increase the time by 1 minute on each retry */
1449 diff = apr_time_from_sec((60 + 60 * worker->retries));
1450 /* Use 10 minutes as maximum value for retry */
1451 if (worker->retries < 8)
1454 if (now > worker->error_time + diff) {
1455 worker->status &= ~PROXY_WORKER_IN_ERROR;
1456 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
1457 "proxy: %s: worker for (%s) has been marked for retry",
1458 proxy_function, worker->hostname);
1468 PROXY_DECLARE(int) ap_proxy_acquire_connection(const char *proxy_function,
1469 proxy_conn_rec **conn,
1470 proxy_worker *worker,
1475 if (!PROXY_WORKER_IS_USABLE(worker)) {
1476 /* Retry the worker */
1477 ap_proxy_retry_worker(proxy_function, worker, s);
1479 if (!PROXY_WORKER_IS_USABLE(worker)) {
1480 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
1481 "proxy: %s: disabled connection for (%s)",
1482 proxy_function, worker->hostname);
1483 return HTTP_SERVICE_UNAVAILABLE;
1488 rv = apr_reslist_acquire(worker->cp->res, (void **)conn);
1493 /* create the new connection if the previous was destroyed */
1494 if (!worker->cp->conn)
1495 connection_constructor((void **)conn, worker, worker->cp->pool);
1497 *conn = worker->cp->conn;
1498 worker->cp->conn = NULL;
1503 if (rv != APR_SUCCESS) {
1504 ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
1505 "proxy: %s: failed to acquire connection for (%s)",
1506 proxy_function, worker->hostname);
1507 return HTTP_SERVICE_UNAVAILABLE;
1509 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
1510 "proxy: %s: has acquired connection for (%s)",
1511 proxy_function, worker->hostname);
1513 (*conn)->worker = worker;
1515 (*conn)->close_on_recycle = 0;
1520 PROXY_DECLARE(int) ap_proxy_release_connection(const char *proxy_function,
1521 proxy_conn_rec *conn,
1524 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
1525 "proxy: %s: has released connection for (%s)",
1526 proxy_function, conn->worker->hostname);
1527 /* If there is a connection kill it's cleanup */
1528 if (conn->connection) {
1529 apr_pool_cleanup_kill(conn->connection->pool, conn, connection_cleanup);
1530 conn->connection = NULL;
1532 connection_cleanup(conn);
1538 ap_proxy_determine_connection(apr_pool_t *p, request_rec *r,
1539 proxy_server_conf *conf,
1540 proxy_worker *worker,
1541 proxy_conn_rec *conn,
1544 const char *proxyname,
1545 apr_port_t proxyport,
1546 char *server_portstr,
1547 int server_portstr_size)
1550 apr_status_t err = APR_SUCCESS;
1552 * Break up the URL to determine the host to connect to
1555 /* we break the URL into host, port, uri */
1556 if (APR_SUCCESS != apr_uri_parse(p, *url, uri)) {
1557 return ap_proxyerror(r, HTTP_BAD_REQUEST,
1558 apr_pstrcat(p,"URI cannot be parsed: ", *url,
1562 uri->port = apr_uri_port_of_scheme(uri->scheme);
1565 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
1566 "proxy: connecting %s to %s:%d", *url, uri->hostname,
1569 /* allocate these out of the specified connection pool
1570 * The scheme handler decides if this is permanent or
1571 * short living pool.
1573 /* are we connecting directly, or via a proxy? */
1575 *url = apr_pstrcat(p, uri->path, uri->query ? "?" : "",
1576 uri->query ? uri->query : "",
1577 uri->fragment ? "#" : "",
1578 uri->fragment ? uri->fragment : "", NULL);
1580 if (!conn->hostname) {
1582 conn->hostname = apr_pstrdup(conn->pool, proxyname);
1583 conn->port = proxyport;
1585 conn->hostname = apr_pstrdup(conn->pool, uri->hostname);
1586 conn->port = uri->port;
1589 /* TODO: add address cache for forward proxies */
1590 conn->addr = worker->cp->addr;
1591 if (r->proxyreq == PROXYREQ_PROXY) {
1592 err = apr_sockaddr_info_get(&(conn->addr),
1593 conn->hostname, APR_UNSPEC,
1597 else if (!worker->cp->addr) {
1598 /* Worker can have the single constant backend adress.
1599 * The single DNS lookup is used once per worker.
1600 * If dynamic change is needed then set the addr to NULL
1601 * inside dynamic config to force the lookup.
1603 err = apr_sockaddr_info_get(&(worker->cp->addr),
1604 conn->hostname, APR_UNSPEC,
1607 conn->addr = worker->cp->addr;
1609 if (err != APR_SUCCESS) {
1610 return ap_proxyerror(r, HTTP_BAD_GATEWAY,
1611 apr_pstrcat(p, "DNS lookup failure for: ",
1612 conn->hostname, NULL));
1615 /* Get the server port for the Via headers */
1617 server_port = ap_get_server_port(r);
1618 if (ap_is_default_port(server_port, r)) {
1619 strcpy(server_portstr,"");
1621 apr_snprintf(server_portstr, server_portstr_size, ":%d",
1626 /* check if ProxyBlock directive on this host */
1627 if (OK != ap_proxy_checkproxyblock(r, conf, conn->addr)) {
1628 return ap_proxyerror(r, HTTP_FORBIDDEN,
1629 "Connect to remote machine blocked");
1634 static int is_socket_connected(apr_socket_t *sock)
1637 apr_size_t buffer_len = 1;
1638 char test_buffer[1];
1639 apr_status_t socket_status;
1640 apr_interval_time_t current_timeout;
1643 apr_socket_timeout_get(sock, ¤t_timeout);
1644 /* set no timeout */
1645 apr_socket_timeout_set(sock, 0);
1646 socket_status = apr_socket_recv(sock, test_buffer, &buffer_len);
1647 /* put back old timeout */
1648 apr_socket_timeout_set(sock, current_timeout);
1649 if (APR_STATUS_IS_EOF(socket_status))
1655 PROXY_DECLARE(int) ap_proxy_connect_backend(const char *proxy_function,
1656 proxy_conn_rec *conn,
1657 proxy_worker *worker,
1663 apr_sockaddr_t *backend_addr = conn->addr;
1664 apr_socket_t *newsock;
1667 /* This increases the connection pool size
1668 * but the number of dropped connections is
1669 * relatively small compared to connection lifetime
1671 if (!(connected = is_socket_connected(conn->sock))) {
1672 apr_socket_close(conn->sock);
1676 while (backend_addr && !connected) {
1677 if ((rv = apr_socket_create(&newsock, backend_addr->family,
1678 SOCK_STREAM, APR_PROTO_TCP,
1679 conn->pool)) != APR_SUCCESS) {
1680 loglevel = backend_addr->next ? APLOG_DEBUG : APLOG_ERR;
1681 ap_log_error(APLOG_MARK, loglevel, rv, s,
1682 "proxy: %s: error creating fam %d socket for target %s",
1684 backend_addr->family,
1686 /* this could be an IPv6 address from the DNS but the
1687 * local machine won't give us an IPv6 socket; hopefully the
1688 * DNS returned an additional address to try
1690 backend_addr = backend_addr->next;
1694 #if !defined(TPF) && !defined(BEOS)
1695 if (worker->recv_buffer_size > 0 &&
1696 (rv = apr_socket_opt_set(newsock, APR_SO_RCVBUF,
1697 worker->recv_buffer_size))) {
1698 ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
1699 "apr_socket_opt_set(SO_RCVBUF): Failed to set "
1700 "ProxyReceiveBufferSize, using default");
1704 /* Set a timeout on the socket */
1705 if (worker->timeout_set == 1) {
1706 apr_socket_timeout_set(newsock, worker->timeout);
1709 apr_socket_timeout_set(newsock, s->timeout);
1711 /* Set a keepalive option */
1712 if (worker->keepalive) {
1713 if ((rv = apr_socket_opt_set(newsock,
1714 APR_SO_KEEPALIVE, 1)) != APR_SUCCESS) {
1715 ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
1716 "apr_socket_opt_set(SO_KEEPALIVE): Failed to set"
1720 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
1721 "proxy: %s: fam %d socket created to connect to %s",
1722 proxy_function, backend_addr->family, worker->hostname);
1724 /* make the connection out of the socket */
1725 rv = apr_socket_connect(newsock, backend_addr);
1727 /* if an error occurred, loop round and try again */
1728 if (rv != APR_SUCCESS) {
1729 apr_socket_close(newsock);
1730 loglevel = backend_addr->next ? APLOG_DEBUG : APLOG_ERR;
1731 ap_log_error(APLOG_MARK, loglevel, rv, s,
1732 "proxy: %s: attempt to connect to %pI (%s) failed",
1736 backend_addr = backend_addr->next;
1740 conn->sock = newsock;
1743 /* Put the entire worker to error state if
1744 * the PROXY_WORKER_IGNORE_ERRORS flag is not set.
1745 * Altrough some connections may be alive
1746 * no further connections to the worker could be made
1748 if (!connected && PROXY_WORKER_IS_USABLE(worker) &&
1749 !(worker->status & PROXY_WORKER_IGNORE_ERRORS)) {
1750 worker->status |= PROXY_WORKER_IN_ERROR;
1751 worker->error_time = apr_time_now();
1752 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
1753 "ap_proxy_connect_backend disabling worker for (%s)",
1757 worker->error_time = 0;
1758 worker->retries = 0;
1760 return connected ? OK : DECLINED;
1763 PROXY_DECLARE(int) ap_proxy_connection_create(const char *proxy_function,
1764 proxy_conn_rec *conn,
1768 apr_sockaddr_t *backend_addr = conn->addr;
1770 /* The socket is now open, create a new backend server connection
1773 conn->connection = ap_run_create_connection(c->pool, s, conn->sock,
1777 if (!conn->connection) {
1778 /* the peer reset the connection already; ap_run_create_connection()
1781 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0,
1782 s, "proxy: %s: an error occurred creating a "
1783 "new connection to %pI (%s)", proxy_function,
1784 backend_addr, conn->hostname);
1785 /* XXX: Will be closed when proxy_conn is closed */
1786 apr_socket_close(conn->sock);
1788 return HTTP_INTERNAL_SERVER_ERROR;
1790 /* register the connection cleanup to client connection
1791 * so that the connection can be closed or reused
1793 apr_pool_cleanup_register(c->pool, (void *)conn,
1795 apr_pool_cleanup_null);
1797 /* For ssl connection to backend */
1799 if (!ap_proxy_ssl_enable(conn->connection)) {
1800 ap_log_error(APLOG_MARK, APLOG_ERR, 0,
1801 s, "proxy: %s: failed to enable ssl support "
1802 "for %pI (%s)", proxy_function,
1803 backend_addr, conn->hostname);
1804 return HTTP_INTERNAL_SERVER_ERROR;
1808 /* TODO: See if this will break FTP */
1809 ap_proxy_ssl_disable(conn->connection);
1812 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
1813 "proxy: %s: connection complete to %pI (%s)",
1814 proxy_function, backend_addr, conn->hostname);
1816 /* set up the connection filters */
1817 ap_run_pre_connection(conn->connection, conn->sock);
1822 int ap_proxy_lb_workers(void)
1824 /* Set the dynamic #workers limit */
1825 lb_workers_limit = lb_workers + PROXY_DYNAMIC_BALANCER_LIMIT;
1826 return lb_workers_limit;