1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 * @brief functions pertaining to virtual host addresses
20 * (configuration and run-time)
24 #include "apr_strings.h"
27 #define APR_WANT_STRFUNC
30 #include "ap_config.h"
32 #include "http_config.h"
34 #include "http_vhost.h"
35 #include "http_protocol.h"
36 #include "http_core.h"
38 #if APR_HAVE_ARPA_INET_H
39 #include <arpa/inet.h>
43 * After all the definitions there's an explanation of how it's all put
47 /* meta-list of name-vhosts. Each server_rec can be in possibly multiple
48 * lists of name-vhosts.
50 typedef struct name_chain name_chain;
53 server_addr_rec *sar; /* the record causing it to be in
54 * this chain (needed for port comparisons) */
55 server_rec *server; /* the server to use on a match */
58 /* meta-list of ip addresses. Each server_rec can be in possibly multiple
59 * hash chains since it can have multiple ips.
61 typedef struct ipaddr_chain ipaddr_chain;
64 server_addr_rec *sar; /* the record causing it to be in
65 * this chain (need for both ip addr and port
67 server_rec *server; /* the server to use if this matches */
68 name_chain *names; /* if non-NULL then a list of name-vhosts
69 * sharing this address */
72 /* This defines the size of the hash table used for hashing ip addresses
73 * of virtual hosts. It must be a power of two.
75 #ifndef IPHASH_TABLE_SIZE
76 #define IPHASH_TABLE_SIZE 256
79 /* A (n) bucket hash table, each entry has a pointer to a server rec and
80 * a pointer to the other entries in that bucket. Each individual address,
81 * even for virtualhosts with multiple addresses, has an entry in this hash
82 * table. There are extra buckets for _default_, and name-vhost entries.
84 * Note that after config time this is constant, so it is thread-safe.
86 static ipaddr_chain *iphash_table[IPHASH_TABLE_SIZE];
88 /* dump out statistics about the hash function */
89 /* #define IPHASH_STATISTICS */
91 /* list of the _default_ servers */
92 static ipaddr_chain *default_list;
94 /* list of the NameVirtualHost addresses */
95 static server_addr_rec *name_vhost_list;
96 static server_addr_rec **name_vhost_list_tail;
101 * The ip address determines which chain in iphash_table is interesting, then
102 * a comparison is done down that chain to find the first ipaddr_chain whose
103 * sar matches the address:port pair.
105 * If that ipaddr_chain has names == NULL then you're done, it's an ip-vhost.
107 * Otherwise it's a name-vhost list, and the default is the server in the
108 * ipaddr_chain record. We tuck away the ipaddr_chain record in the
109 * conn_rec field vhost_lookup_data. Later on after the headers we get a
110 * second chance, and we use the name_chain to figure out what name-vhost
111 * matches the headers.
113 * If there was no ip address match in the iphash_table then do a lookup
114 * in the default_list.
116 * How it's put together ... well you should be able to figure that out
117 * from how it's used. Or something like that.
121 /* called at the beginning of the config */
122 AP_DECLARE(void) ap_init_vhost_config(apr_pool_t *p)
124 memset(iphash_table, 0, sizeof(iphash_table));
126 name_vhost_list = NULL;
127 name_vhost_list_tail = &name_vhost_list;
132 * Parses a host of the form <address>[:port]
133 * paddr is used to create a list in the order of input
134 * **paddr is the ->next pointer of the last entry (or s->addrs)
135 * *paddr is the variable used to keep track of **paddr between calls
136 * port is the default port to assume
138 static const char *get_addresses(apr_pool_t *p, const char *w_,
139 server_addr_rec ***paddr,
140 apr_port_t default_port)
142 apr_sockaddr_t *my_addr;
143 server_addr_rec *sar;
144 char *w, *host, *scope_id;
153 w = apr_pstrdup(p, w_);
154 /* apr_parse_addr_port() doesn't understand ":*" so handle that first. */
155 wlen = strlen(w); /* wlen must be > 0 at this point */
157 if (w[wlen - 1] == '*') {
161 else if (w[wlen - 2] == ':') {
166 rv = apr_parse_addr_port(&host, &scope_id, &port, w, p);
167 /* If the string is "80", apr_parse_addr_port() will be happy and set
168 * host to NULL and port to 80, so watch out for that.
170 if (rv != APR_SUCCESS) {
171 return "The address or port is invalid";
174 return "Missing address for VirtualHost";
177 return "Scope ids are not supported";
179 if (!port && !wild_port) {
183 if (strcmp(host, "*") == 0) {
184 rv = apr_sockaddr_info_get(&my_addr, "0.0.0.0", APR_INET, port, 0, p);
186 return "Could not resolve address '0.0.0.0' -- "
187 "check resolver configuration.";
190 else if (strcasecmp(host, "_default_") == 0
191 || strcmp(host, "255.255.255.255") == 0) {
192 rv = apr_sockaddr_info_get(&my_addr, "255.255.255.255", APR_INET, port, 0, p);
194 return "Could not resolve address '255.255.255.255' -- "
195 "check resolver configuration.";
199 rv = apr_sockaddr_info_get(&my_addr, host, APR_UNSPEC, port, 0, p);
200 if (rv != APR_SUCCESS) {
201 ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL,
202 "Could not resolve host name %s -- ignoring!", host);
207 /* Remember all addresses for the host */
210 sar = apr_pcalloc(p, sizeof(server_addr_rec));
213 sar->host_addr = my_addr;
214 sar->host_port = port;
215 sar->virthost = host;
216 my_addr = my_addr->next;
223 /* parse the <VirtualHost> addresses */
224 const char *ap_parse_vhost_addrs(apr_pool_t *p,
225 const char *hostname,
228 server_addr_rec **addrs;
231 /* start the list of addreses */
233 while (hostname[0]) {
234 err = get_addresses(p, ap_getword_conf(p, &hostname), &addrs, s->port);
240 /* terminate the list */
243 if (s->addrs->host_port) {
244 /* override the default port which is inherited from main_server */
245 s->port = s->addrs->host_port;
252 AP_DECLARE_NONSTD(const char *)ap_set_name_virtual_host(cmd_parms *cmd,
256 /* use whatever port the main server has at this point */
257 return get_addresses(cmd->pool, arg, &name_vhost_list_tail,
262 /* hash table statistics, keep this in here for the beta period so
263 * we can find out if the hash function is ok
265 #ifdef IPHASH_STATISTICS
266 static int iphash_compare(const void *a, const void *b)
268 return (*(const int *) b - *(const int *) a);
272 static void dump_iphash_statistics(server_rec *main_s)
274 unsigned count[IPHASH_TABLE_SIZE];
278 char buf[HUGE_STRING_LEN];
282 for (i = 0; i < IPHASH_TABLE_SIZE; ++i) {
284 for (src = iphash_table[i]; src; src = src->next) {
286 if (i < IPHASH_TABLE_SIZE) {
287 /* don't count the slop buckets in the total */
292 qsort(count, IPHASH_TABLE_SIZE, sizeof(count[0]), iphash_compare);
293 p = buf + apr_snprintf(buf, sizeof(buf),
294 "iphash: total hashed = %u, avg chain = %u, "
295 "chain lengths (count x len):",
296 total, total / IPHASH_TABLE_SIZE);
298 for (i = 1; i < IPHASH_TABLE_SIZE; ++i) {
299 if (count[i - 1] != count[i]) {
300 p += apr_snprintf(p, sizeof(buf) - (p - buf), " %ux%u",
301 total, count[i - 1]);
308 p += apr_snprintf(p, sizeof(buf) - (p - buf), " %ux%u",
309 total, count[IPHASH_TABLE_SIZE - 1]);
310 ap_log_error(APLOG_MARK, APLOG_DEBUG, main_s, buf);
315 /* This hashing function is designed to get good distribution in the cases
316 * where the server is handling entire "networks" of servers. i.e. a
317 * whack of /24s. This is probably the most common configuration for
318 * ISPs with large virtual servers.
320 * NOTE: This function is symmetric (i.e. collapses all 4 octets
321 * into one), so machine byte order (big/little endianness) does not matter.
323 * Hash function provided by David Hankins.
325 static APR_INLINE unsigned hash_inaddr(unsigned key)
328 return ((key >> 8) ^ key) % IPHASH_TABLE_SIZE;
331 static APR_INLINE unsigned hash_addr(struct apr_sockaddr_t *sa)
335 /* The key is the last four bytes of the IP address.
336 * For IPv4, this is the entire address, as always.
337 * For IPv6, this is usually part of the MAC address.
339 key = *(unsigned *)((char *)sa->ipaddr_ptr + sa->ipaddr_len - 4);
340 return hash_inaddr(key);
343 static ipaddr_chain *new_ipaddr_chain(apr_pool_t *p,
344 server_rec *s, server_addr_rec *sar)
348 new = apr_palloc(p, sizeof(*new));
357 static name_chain *new_name_chain(apr_pool_t *p,
358 server_rec *s, server_addr_rec *sar)
362 new = apr_palloc(p, sizeof(*new));
370 static APR_INLINE ipaddr_chain *find_ipaddr(apr_sockaddr_t *sa)
375 /* scan the hash table for an exact match first */
376 bucket = hash_addr(sa);
377 for (trav = iphash_table[bucket]; trav; trav = trav->next) {
378 server_addr_rec *sar = trav->sar;
379 apr_sockaddr_t *cur = sar->host_addr;
381 if (cur->port == 0 || sa->port == 0 || cur->port == sa->port) {
382 if (apr_sockaddr_equal(cur, sa)) {
390 static ipaddr_chain *find_default_server(apr_port_t port)
392 server_addr_rec *sar;
395 for (trav = default_list; trav; trav = trav->next) {
397 if (sar->host_port == 0 || sar->host_port == port) {
405 static void dump_a_vhost(apr_file_t *f, ipaddr_chain *ic)
409 char buf[MAX_STRING_LEN];
410 apr_sockaddr_t *ha = ic->sar->host_addr;
412 if (ha->family == APR_INET &&
413 ha->sa.sin.sin_addr.s_addr == DEFAULT_VHOST_ADDR) {
414 len = apr_snprintf(buf, sizeof(buf), "_default_:%u",
417 else if (ha->family == APR_INET &&
418 ha->sa.sin.sin_addr.s_addr == INADDR_ANY) {
419 len = apr_snprintf(buf, sizeof(buf), "*:%u",
423 len = apr_snprintf(buf, sizeof(buf), "%pI", ha);
425 if (ic->sar->host_port == 0) {
428 if (ic->names == NULL) {
429 apr_file_printf(f, "%-22s %s (%s:%u)\n", buf,
430 ic->server->server_hostname,
431 ic->server->defn_name, ic->server->defn_line_number);
434 apr_file_printf(f, "%-22s is a NameVirtualHost\n"
435 "%8s default server %s (%s:%u)\n",
436 buf, "", ic->server->server_hostname,
437 ic->server->defn_name, ic->server->defn_line_number);
438 for (nc = ic->names; nc; nc = nc->next) {
439 if (nc->sar->host_port) {
440 apr_file_printf(f, "%8s port %u ", "", nc->sar->host_port);
443 apr_file_printf(f, "%8s port * ", "");
445 apr_file_printf(f, "namevhost %s (%s:%u)\n",
446 nc->server->server_hostname,
447 nc->server->defn_name, nc->server->defn_line_number);
451 static void dump_vhost_config(apr_file_t *f)
456 apr_file_printf(f, "VirtualHost configuration:\n");
457 for (i = 0; i < IPHASH_TABLE_SIZE; ++i) {
458 for (ic = iphash_table[i]; ic; ic = ic->next) {
463 apr_file_printf(f, "wildcard NameVirtualHosts and _default_ servers:\n");
464 for (ic = default_list; ic; ic = ic->next) {
471 * Two helper functions for ap_fini_vhost_config()
473 static int add_name_vhost_config(apr_pool_t *p, server_rec *main_s,
474 server_rec *s, server_addr_rec *sar,
477 /* the first time we encounter a NameVirtualHost address
478 * ic->server will be NULL, on subsequent encounters
479 * ic->names will be non-NULL.
481 if (ic->names || ic->server == NULL) {
482 name_chain *nc = new_name_chain(p, s, sar);
483 nc->next = ic->names;
486 if (sar->host_port != ic->sar->host_port) {
487 /* one of the two is a * port, the other isn't */
488 ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_s,
489 "VirtualHost %s:%u -- mixing * "
490 "ports and non-* ports with "
491 "a NameVirtualHost address is not supported,"
492 " proceeding with undefined results",
493 sar->virthost, sar->host_port);
498 /* IP-based vhosts are handled by the caller */
503 static void remove_unused_name_vhosts(server_rec *main_s, ipaddr_chain **pic)
506 ipaddr_chain *ic = *pic;
508 if (ic->server == NULL) {
509 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, main_s,
510 "NameVirtualHost %s:%u has no VirtualHosts",
511 ic->sar->virthost, ic->sar->host_port);
520 /* compile the tables and such we need to do the run-time vhost lookups */
521 AP_DECLARE(void) ap_fini_vhost_config(apr_pool_t *p, server_rec *main_s)
523 server_addr_rec *sar;
524 int has_default_vhost_addr;
527 ipaddr_chain **iphash_table_tail[IPHASH_TABLE_SIZE];
529 /* terminate the name_vhost list */
530 *name_vhost_list_tail = NULL;
532 /* Main host first */
535 if (!s->server_hostname) {
536 s->server_hostname = ap_get_local_host(p);
539 /* initialize the tails */
540 for (i = 0; i < IPHASH_TABLE_SIZE; ++i) {
541 iphash_table_tail[i] = &iphash_table[i];
544 /* The first things to go into the hash table are the NameVirtualHosts
545 * Since name_vhost_list is in the same order that the directives
546 * occured in the config file, we'll copy it in that order.
548 for (sar = name_vhost_list; sar; sar = sar->next) {
549 char inaddr_any[16] = {0}; /* big enough to handle IPv4 or IPv6 */
550 unsigned bucket = hash_addr(sar->host_addr);
551 ipaddr_chain *ic = new_ipaddr_chain(p, NULL, sar);
553 if (memcmp(sar->host_addr->ipaddr_ptr, inaddr_any,
554 sar->host_addr->ipaddr_len)) { /* not IN[6]ADDR_ANY */
555 *iphash_table_tail[bucket] = ic;
556 iphash_table_tail[bucket] = &ic->next;
559 /* A wildcard NameVirtualHost goes on the default_list so
560 * that it can catch incoming requests on any address.
562 ic->next = default_list;
565 /* Notice that what we've done is insert an ipaddr_chain with
566 * both server and names NULL. This fact is used to spot name-
567 * based vhosts in add_name_vhost_config().
571 /* The next things to go into the hash table are the virtual hosts
572 * themselves. They're listed off of main_s->next in the reverse
573 * order they occured in the config file, so we insert them at
574 * the iphash_table_tail but don't advance the tail.
577 for (s = main_s->next; s; s = s->next) {
578 has_default_vhost_addr = 0;
579 for (sar = s->addrs; sar; sar = sar->next) {
581 char inaddr_any[16] = {0}; /* big enough to handle IPv4 or IPv6 */
583 if ((sar->host_addr->family == AF_INET &&
584 sar->host_addr->sa.sin.sin_addr.s_addr == DEFAULT_VHOST_ADDR)
585 || !memcmp(sar->host_addr->ipaddr_ptr, inaddr_any, sar->host_addr->ipaddr_len)) {
586 ic = find_default_server(sar->host_port);
587 if (!ic || !add_name_vhost_config(p, main_s, s, sar, ic)) {
588 if (ic && ic->sar->host_port != 0) {
589 ap_log_error(APLOG_MARK, APLOG_WARNING,
590 0, main_s, "_default_ VirtualHost "
591 "overlap on port %u, the first has "
592 "precedence", sar->host_port);
594 ic = new_ipaddr_chain(p, s, sar);
595 ic->next = default_list;
598 has_default_vhost_addr = 1;
601 /* see if it matches something we've already got */
602 ic = find_ipaddr(sar->host_addr);
605 unsigned bucket = hash_addr(sar->host_addr);
607 ic = new_ipaddr_chain(p, s, sar);
608 ic->next = *iphash_table_tail[bucket];
609 *iphash_table_tail[bucket] = ic;
611 else if (!add_name_vhost_config(p, main_s, s, sar, ic)) {
612 ap_log_error(APLOG_MARK, APLOG_WARNING,
613 0, main_s, "VirtualHost %s:%u overlaps "
614 "with VirtualHost %s:%u, the first has "
615 "precedence, perhaps you need a "
616 "NameVirtualHost directive",
617 sar->virthost, sar->host_port,
618 ic->sar->virthost, ic->sar->host_port);
625 /* Ok now we want to set up a server_hostname if the user was
626 * silly enough to forget one.
627 * XXX: This is silly we should just crash and burn.
629 if (!s->server_hostname) {
630 if (has_default_vhost_addr) {
631 s->server_hostname = main_s->server_hostname;
633 else if (!s->addrs) {
634 /* what else can we do? at this point this vhost has
635 no configured name, probably because they used
636 DNS in the VirtualHost statement. It's disabled
637 anyhow by the host matching code. -djg */
639 apr_pstrdup(p, "bogus_host_without_forward_dns");
645 rv = apr_getnameinfo(&hostname, s->addrs->host_addr, 0);
646 if (rv == APR_SUCCESS) {
647 s->server_hostname = apr_pstrdup(p, hostname);
650 /* again, what can we do? They didn't specify a
651 ServerName, and their DNS isn't working. -djg */
654 apr_sockaddr_ip_get(&ipaddr_str, s->addrs->host_addr);
655 ap_log_error(APLOG_MARK, APLOG_ERR, rv, main_s,
656 "Failed to resolve server name "
657 "for %s (check DNS) -- or specify an explicit "
661 apr_pstrdup(p, "bogus_host_without_reverse_dns");
667 /* now go through and delete any NameVirtualHosts that didn't have any
668 * hosts associated with them. Lamers.
670 for (i = 0; i < IPHASH_TABLE_SIZE; ++i) {
671 remove_unused_name_vhosts(main_s, &iphash_table[i]);
673 remove_unused_name_vhosts(main_s, &default_list);
675 #ifdef IPHASH_STATISTICS
676 dump_iphash_statistics(main_s);
678 if (ap_exists_config_define("DUMP_VHOSTS")) {
679 apr_file_t *thefile = NULL;
680 apr_file_open_stdout(&thefile, p);
681 dump_vhost_config(thefile);
686 /*****************************************************************************
687 * run-time vhost matching functions
690 /* Lowercase and remove any trailing dot and/or :port from the hostname,
691 * and check that it is sane.
693 * In most configurations the exact syntax of the hostname isn't
694 * important so strict sanity checking isn't necessary. However, in
695 * mass hosting setups (using mod_vhost_alias or mod_rewrite) where
696 * the hostname is interpolated into the filename, we need to be sure
697 * that the interpolation doesn't expose parts of the filesystem.
698 * We don't do strict RFC 952 / RFC 1123 syntax checking in order
699 * to support iDNS and people who erroneously use underscores.
700 * Instead we just check for filesystem metacharacters: directory
701 * separators / and \ and sequences of more than one dot.
703 static void fix_hostname(request_rec *r)
705 char *host, *scope_id;
711 /* According to RFC 2616, Host header field CAN be blank. */
716 /* apr_parse_addr_port will interpret a bare integer as a port
717 * which is incorrect in this context. So treat it separately.
719 for (c = r->hostname; apr_isdigit(*c); ++c);
720 if (!*c) { /* pure integer */
724 rv = apr_parse_addr_port(&host, &scope_id, &port, r->hostname, r->pool);
725 if (rv != APR_SUCCESS || scope_id) {
730 /* Don't throw the Host: header's port number away:
731 save it in parsed_uri -- ap_get_server_port() needs it! */
732 /* @@@ XXX there should be a better way to pass the port.
733 * Like r->hostname, there should be a r->portno
735 r->parsed_uri.port = port;
736 r->parsed_uri.port_str = apr_itoa(r->pool, (int)port);
739 /* if the hostname is an IPv6 numeric address string, it was validated
740 * already; otherwise, further validation is needed
742 if (r->hostname[0] != '[') {
743 for (dst = host; *dst; dst++) {
744 if (apr_islower(*dst)) {
745 /* leave char unchanged */
747 else if (*dst == '.') {
748 if (*(dst + 1) == '.') {
752 else if (apr_isupper(*dst)) {
753 *dst = apr_tolower(*dst);
755 else if (*dst == '/' || *dst == '\\') {
759 /* strip trailing gubbins */
760 if (dst > host && dst[-1] == '.') {
768 r->status = HTTP_BAD_REQUEST;
769 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
770 "Client sent malformed Host header");
775 /* return 1 if host matches ServerName or ServerAliases */
776 static int matches_aliases(server_rec *s, const char *host)
779 apr_array_header_t *names;
781 /* match ServerName */
782 if (!strcasecmp(host, s->server_hostname)) {
786 /* search all the aliases from ServerAlias directive */
789 char **name = (char **) names->elts;
790 for (i = 0; i < names->nelts; ++i) {
791 if(!name[i]) continue;
792 if (!strcasecmp(host, name[i]))
796 names = s->wild_names;
798 char **name = (char **) names->elts;
799 for (i = 0; i < names->nelts; ++i) {
800 if(!name[i]) continue;
801 if (!ap_strcasecmp_match(host, name[i]))
809 /* Suppose a request came in on the same socket as this r, and included
810 * a header "Host: host:port", would it map to r->server? It's more
811 * than just that though. When we do the normal matches for each request
812 * we don't even bother considering Host: etc on non-namevirtualhosts,
813 * we just call it a match. But here we require the host:port to match
814 * the ServerName and/or ServerAliases.
816 AP_DECLARE(int) ap_matches_request_vhost(request_rec *r, const char *host,
820 server_addr_rec *sar;
824 /* search all the <VirtualHost> values */
825 /* XXX: If this is a NameVirtualHost then we may not be doing the Right Thing
828 * NameVirtualHost 10.1.1.1
829 * <VirtualHost 10.1.1.1>
832 * <VirtualHost 10.1.1.1>
836 * Suppose r->server is v2, and we're asked to match "10.1.1.1". We'll say
837 * "yup it's v2", when really it isn't... if a request came in for 10.1.1.1
838 * it would really go to v1.
840 for (sar = s->addrs; sar; sar = sar->next) {
841 if ((sar->host_port == 0 || port == sar->host_port)
842 && !strcasecmp(host, sar->virthost)) {
847 /* the Port has to match now, because the rest don't have ports associated
849 if (port != s->port) {
853 return matches_aliases(s, host);
857 static void check_hostalias(request_rec *r)
860 * Even if the request has a Host: header containing a port we ignore
861 * that port. We always use the physical port of the socket. There
862 * are a few reasons for this:
864 * - the default of 80 or 443 for SSL is easier to handle this way
865 * - there is less of a possibility of a security problem
866 * - it simplifies the data structure
867 * - the client may have no idea that a proxy somewhere along the way
868 * translated the request to another ip:port
869 * - except for the addresses from the VirtualHost line, none of the other
870 * names we'll match have ports associated with them
872 const char *host = r->hostname;
880 port = r->connection->local_addr->port;
882 /* Recall that the name_chain is a list of server_addr_recs, some of
883 * whose ports may not match. Also each server may appear more than
884 * once in the chain -- specifically, it will appear once for each
885 * address from its VirtualHost line which matched. We only want to
886 * do the full ServerName/ServerAlias comparisons once for each
887 * server, fortunately we know that all the VirtualHost addresses for
888 * a single server are adjacent to each other.
891 for (src = r->connection->vhost_lookup_data; src; src = src->next) {
892 server_addr_rec *sar;
894 /* We only consider addresses on the name_chain which have a matching
898 if (sar->host_port != 0 && port != sar->host_port) {
904 /* does it match the virthost from the sar? */
905 if (!strcasecmp(host, sar->virthost)) {
910 /* we've already done ServerName and ServerAlias checks for this
917 if (matches_aliases(s, host)) {
924 /* s is the first matching server, we're done */
929 static void check_serverpath(request_rec *r)
936 port = r->connection->local_addr->port;
939 * This is in conjunction with the ServerPath code in http_core, so we
940 * get the right host attached to a non- Host-sending request.
942 * See the comment in check_hostalias about how each vhost can be
943 * listed multiple times.
947 for (src = r->connection->vhost_lookup_data; src; src = src->next) {
948 /* We only consider addresses on the name_chain which have a matching
951 if (src->sar->host_port != 0 && port != src->sar->host_port) {
961 if (s->path && !strncmp(r->uri, s->path, s->pathlen) &&
962 (s->path[s->pathlen - 1] == '/' ||
963 r->uri[s->pathlen] == '/' ||
964 r->uri[s->pathlen] == '\0')) {
972 AP_DECLARE(void) ap_update_vhost_from_headers(request_rec *r)
974 /* must set this for HTTP/1.1 support */
975 if (r->hostname || (r->hostname = apr_table_get(r->headers_in, "Host"))) {
977 if (r->status != HTTP_OK)
980 /* check if we tucked away a name_chain */
981 if (r->connection->vhost_lookup_data) {
990 * For every virtual host on this connection, call func_cb.
992 AP_DECLARE(int) ap_vhost_iterate_given_conn(conn_rec *conn,
993 ap_vhost_iterate_conn_cb func_cb,
1002 if (conn->vhost_lookup_data) {
1004 port = conn->local_addr->port;
1006 for (src = conn->vhost_lookup_data; src; src = src->next) {
1007 server_addr_rec *sar;
1009 /* We only consider addresses on the name_chain which have a
1013 if (sar->host_port != 0 && port != sar->host_port) {
1020 /* we've already done a callback for this vhost. */
1026 rv = func_cb(baton, conn, s);
1034 rv = func_cb(baton, conn, conn->base_server);
1040 /* Called for a new connection which has a known local_addr. Note that the
1041 * new connection is assumed to have conn->server == main server.
1043 AP_DECLARE(void) ap_update_vhost_given_ip(conn_rec *conn)
1048 /* scan the hash table for an exact match first */
1049 trav = find_ipaddr(conn->local_addr);
1052 /* save the name_chain for later in case this is a name-vhost */
1053 conn->vhost_lookup_data = trav->names;
1054 conn->base_server = trav->server;
1058 /* maybe there's a default server or wildcard name-based vhost
1059 * matching this port
1061 port = conn->local_addr->port;
1063 trav = find_default_server(port);
1065 conn->vhost_lookup_data = trav->names;
1066 conn->base_server = trav->server;
1070 /* otherwise we're stuck with just the main server
1071 * and no name-based vhosts
1073 conn->vhost_lookup_data = NULL;