2 * IRC - Internet Relay Chat, ircd/s_conf.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 1, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * @brief ircd configuration file driver
31 #include "ircd_features.h"
36 #include "ircd_alloc.h"
37 #include "ircd_auth.h"
38 #include "ircd_chattr.h"
40 #include "ircd_reply.h"
41 #include "ircd_snprintf.h"
42 #include "ircd_string.h"
59 /* #include <assert.h> -- Now using assert in ircd_log.h */
60 #include <arpa/inet.h>
70 /** Global list of all ConfItem structures. */
71 struct ConfItem *GlobalConfList;
72 /** Count of items in #GlobalConfList. */
74 /** Global list of service mappings. */
75 struct s_map *GlobalServiceMapList;
76 /** Global list of channel quarantines. */
77 struct qline *GlobalQuarantineList;
79 /** Current line number in scanner input. */
82 /** Configuration information for #me. */
83 struct LocalConf localConf;
84 /** Global list of connection rules. */
85 struct CRuleConf* cruleConfList;
86 /** Global list of K-lines. */
87 struct DenyConf* denyConfList;
89 /** Tell a user that they are banned, dumping the message from a file.
90 * @param sptr Client being rejected
91 * @param filename Send this file's contents to \a sptr
93 static void killcomment(struct Client* sptr, const char* filename)
100 if (NULL == (file = fbopen(filename, "r"))) {
101 send_reply(sptr, ERR_NOMOTD);
102 send_reply(sptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
103 ":Connection from your host is refused on this server.");
107 tm = localtime((time_t*) &sb.st_mtime); /* NetBSD needs cast */
108 while (fbgets(line, sizeof(line) - 1, file)) {
109 char* end = line + strlen(line);
112 if ('\n' == *end || '\r' == *end)
117 send_reply(sptr, RPL_MOTD, line);
119 send_reply(sptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
120 ":Connection from your host is refused on this server.");
124 /** Allocate a new struct ConfItem and link it to #GlobalConfList.
125 * @return Newly allocated structure.
127 struct ConfItem* make_conf(int type)
129 struct ConfItem* aconf;
131 aconf = (struct ConfItem*) MyMalloc(sizeof(struct ConfItem));
136 memset(aconf, 0, sizeof(struct ConfItem));
137 aconf->status = type;
138 aconf->next = GlobalConfList;
139 GlobalConfList = aconf;
143 /** Free a struct ConfItem and any resources it owns.
144 * @param aconf Item to free.
146 void free_conf(struct ConfItem *aconf)
148 Debug((DEBUG_DEBUG, "free_conf: %s %s %d",
149 aconf->host ? aconf->host : "*",
150 aconf->name ? aconf->name : "*",
151 aconf->address.port));
152 if (aconf->dns_pending)
153 delete_resolver_queries(aconf);
156 memset(aconf->passwd, 0, strlen(aconf->passwd));
157 MyFree(aconf->passwd);
165 /** Disassociate configuration from the client.
166 * @param cptr Client to operate on.
167 * @param aconf ConfItem to detach.
169 static void detach_conf(struct Client* cptr, struct ConfItem* aconf)
176 assert(0 < aconf->clients);
178 lp = &(cli_confs(cptr));
181 if ((*lp)->value.aconf == aconf) {
182 if (aconf->conn_class && (aconf->status & CONF_CLIENT_MASK) && ConfLinks(aconf) > 0)
185 assert(0 < aconf->clients);
186 if (0 == --aconf->clients && IsIllegal(aconf))
197 /** Parse a user\@host mask into username and host or IP parts.
198 * If \a host contains no username part, set \a aconf->username to
199 * NULL. If the host part of \a host looks like an IP mask, set \a
200 * aconf->addrbits and \a aconf->address to match. Otherwise, set
201 * \a aconf->host, and set \a aconf->addrbits to -1.
202 * @param[in,out] aconf Configuration item to set.
203 * @param[in] host user\@host mask to parse.
205 void conf_parse_userhost(struct ConfItem *aconf, char *host)
208 unsigned char addrbits;
210 MyFree(aconf->username);
212 host_part = strchr(host, '@');
215 DupString(aconf->username, host);
218 aconf->username = NULL;
221 DupString(aconf->host, host_part);
222 if (ipmask_parse(aconf->host, &aconf->address.addr, &addrbits))
223 aconf->addrbits = addrbits;
225 aconf->addrbits = -1;
229 /** Copies a completed DNS query into its ConfItem.
230 * @param vptr Pointer to struct ConfItem for the block.
231 * @param hp DNS reply, or NULL if the lookup failed.
233 static void conf_dns_callback(void* vptr, struct DNSReply* hp)
235 struct ConfItem* aconf = (struct ConfItem*) vptr;
237 aconf->dns_pending = 0;
239 memcpy(&aconf->address.addr, &hp->addr, sizeof(aconf->address.addr));
244 /** Start a nameserver lookup of the conf host. If the conf entry is
245 * currently doing a lookup, do nothing.
246 * @param aconf ConfItem for which to start a request.
248 static void conf_dns_lookup(struct ConfItem* aconf)
250 if (!aconf->dns_pending) {
251 char buf[HOSTLEN + 1];
252 struct DNSQuery query;
254 query.callback = conf_dns_callback;
255 host_from_uh(buf, aconf->host, HOSTLEN);
258 gethost_byname(buf, &query);
259 aconf->dns_pending = 1;
264 /** Start lookups of all addresses in the conf line. The origin must
265 * be a numeric IP address. If the remote host field is not an IP
266 * address, start a DNS lookup for it.
267 * @param aconf Connection to do lookups for.
270 lookup_confhost(struct ConfItem *aconf)
272 if (EmptyString(aconf->host) || EmptyString(aconf->name)) {
273 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
274 aconf->host, aconf->name));
277 if (aconf->origin_name
278 && !ircd_aton(&aconf->origin.addr, aconf->origin_name)) {
279 Debug((DEBUG_ERROR, "Origin name error: (%s) (%s)",
280 aconf->origin_name, aconf->name));
283 * Do name lookup now on hostnames given and store the
284 * ip numbers in conf structure.
286 if (IsIP6Char(*aconf->host)) {
287 if (!ircd_aton(&aconf->address.addr, aconf->host)) {
288 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
289 aconf->host, aconf->name));
293 conf_dns_lookup(aconf);
296 /** Find a server by name or hostname.
297 * @param name Server name to find.
298 * @return Pointer to the corresponding ConfItem, or NULL if none exists.
300 struct ConfItem* conf_find_server(const char* name)
302 struct ConfItem* conf;
305 for (conf = GlobalConfList; conf; conf = conf->next) {
306 if (CONF_SERVER == conf->status) {
308 * Check first servernames, then try hostnames.
309 * XXX - match returns 0 if there _is_ a match... guess they
310 * haven't decided what true is yet
312 if (0 == match(name, conf->name))
319 /** Evaluate connection rules.
320 * @param name Name of server to check
321 * @param mask Filter for CRule types (only consider if type & \a mask != 0).
322 * @return Name of rule that forbids the connection; NULL if no prohibitions.
324 const char* conf_eval_crule(const char* name, int mask)
326 struct CRuleConf* p = cruleConfList;
329 for ( ; p; p = p->next) {
330 if (0 != (p->type & mask) && 0 == match(p->hostmask, name)) {
331 if (crule_eval(p->node))
338 /** Remove all conf entries from the client except those which match
339 * the status field mask.
340 * @param cptr Client to operate on.
341 * @param mask ConfItem types to keep.
343 void det_confs_butmask(struct Client* cptr, int mask)
349 for (link = cli_confs(cptr); link; link = next) {
351 if ((link->value.aconf->status & mask) == 0)
352 detach_conf(cptr, link->value.aconf);
356 /** Check client limits and attach Client block.
357 * If there are more connections from the IP than \a aconf->maximum
358 * allows, return ACR_TOO_MANY_FROM_IP. Otherwise, attach \a aconf to
360 * @param cptr Client getting \a aconf.
361 * @param aconf Configuration item to attach.
362 * @return Authorization check result.
364 static enum AuthorizationCheckResult
365 check_limit_and_attach(struct Client* cptr, struct ConfItem* aconf)
367 if (IPcheck_nr(cptr) > aconf->maximum)
368 return ACR_TOO_MANY_FROM_IP;
369 return attach_conf(cptr, aconf);
372 /** Find the first (best) Client block to attach.
373 * @param cptr Client for whom to check rules.
374 * @return Authorization check result.
376 enum AuthorizationCheckResult attach_iline(struct Client* cptr)
378 struct ConfItem* aconf;
383 hp = cli_dns_reply(cptr);
384 for (aconf = GlobalConfList; aconf; aconf = aconf->next) {
385 if (aconf->status != CONF_CLIENT)
387 if (aconf->address.port && aconf->address.port != cli_listener(cptr)->addr.port)
389 if (aconf->username) {
390 SetFlag(cptr, FLAG_DOID);
391 if (match(aconf->username, cli_username(cptr)))
394 if (aconf->host && (!hp || match(aconf->host, hp->h_name)))
396 if ((aconf->addrbits >= 0)
397 && !ipmask_check(&cli_ip(cptr), &aconf->address.addr, aconf->addrbits))
399 return check_limit_and_attach(cptr, aconf);
401 return ACR_NO_AUTHORIZATION;
404 /** Check whether a particular ConfItem is already attached to a
406 * @param aconf ConfItem to search for
407 * @param cptr Client to check
408 * @return Non-zero if \a aconf is attached to \a cptr, zero if not.
410 static int is_attached(struct ConfItem *aconf, struct Client *cptr)
414 for (lp = cli_confs(cptr); lp; lp = lp->next) {
415 if (lp->value.aconf == aconf)
421 /** Associate a specific configuration entry to a *local* client (this
422 * is the one which used in accepting the connection). Note, that this
423 * automaticly changes the attachment if there was an old one...
424 * @param cptr Client to attach \a aconf to
425 * @param aconf ConfItem to attach
426 * @return Authorization check result.
428 enum AuthorizationCheckResult attach_conf(struct Client *cptr, struct ConfItem *aconf)
432 if (is_attached(aconf, cptr))
433 return ACR_ALREADY_AUTHORIZED;
434 if (IsIllegal(aconf))
435 return ACR_NO_AUTHORIZATION;
436 if ((aconf->status & (CONF_OPERATOR | CONF_CLIENT)) &&
437 ConfLinks(aconf) >= ConfMaxLinks(aconf) && ConfMaxLinks(aconf) > 0)
438 return ACR_TOO_MANY_IN_CLASS; /* Use this for printing error message */
440 lp->next = cli_confs(cptr);
441 lp->value.aconf = aconf;
442 cli_confs(cptr) = lp;
444 if (aconf->status & CONF_CLIENT_MASK)
449 /** Return our LocalConf configuration structure.
450 * @return A pointer to #localConf.
452 const struct LocalConf* conf_get_local(void)
457 /** Attach ConfItems to a client if the name passed matches that for
458 * the ConfItems or is an exact match for them.
459 * @param cptr Client getting the ConfItem attachments.
460 * @param name Filter to match ConfItem::name.
461 * @param statmask Filter to limit ConfItem::status.
462 * @return First ConfItem attached to \a cptr.
464 struct ConfItem* attach_confs_byname(struct Client* cptr, const char* name,
467 struct ConfItem* tmp;
468 struct ConfItem* first = NULL;
472 if (HOSTLEN < strlen(name))
475 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
476 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
477 assert(0 != tmp->name);
478 if (0 == match(tmp->name, name) || 0 == ircd_strcmp(tmp->name, name)) {
479 if (ACR_OK == attach_conf(cptr, tmp) && !first)
487 /** Attach ConfItems to a client if the host passed matches that for
488 * the ConfItems or is an exact match for them.
489 * @param cptr Client getting the ConfItem attachments.
490 * @param host Filter to match ConfItem::host.
491 * @param statmask Filter to limit ConfItem::status.
492 * @return First ConfItem attached to \a cptr.
494 struct ConfItem* attach_confs_byhost(struct Client* cptr, const char* host,
497 struct ConfItem* tmp;
498 struct ConfItem* first = 0;
501 if (HOSTLEN < strlen(host))
504 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
505 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
506 assert(0 != tmp->host);
507 if (0 == match(tmp->host, host) || 0 == ircd_strcmp(tmp->host, host)) {
508 if (ACR_OK == attach_conf(cptr, tmp) && !first)
516 /** Find a ConfItem that has the same name and user+host fields as
517 * specified. Requires an exact match for \a name.
518 * @param name Name to match
519 * @param cptr Client to match against
520 * @param statmask Filter for ConfItem::status
521 * @return First found matching ConfItem.
523 struct ConfItem* find_conf_exact(const char* name, struct Client *cptr, int statmask)
525 struct ConfItem *tmp;
527 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
528 if (!(tmp->status & statmask) || !tmp->name || !tmp->host ||
529 0 != ircd_strcmp(tmp->name, name))
532 && (EmptyString(cli_username(cptr))
533 || match(tmp->username, cli_username(cptr))))
535 if (tmp->addrbits < 0)
537 if (match(tmp->host, cli_sockhost(cptr)))
540 else if (!ipmask_check(&cli_ip(cptr), &tmp->address.addr, tmp->addrbits))
542 if ((tmp->status & CONF_OPERATOR)
543 && (tmp->clients >= MaxLinks(tmp->conn_class)))
550 /** Find a ConfItem from a list that has a name that matches \a name.
551 * @param lp List to search in.
552 * @param name Filter for ConfItem::name field; matches either exactly
554 * @param statmask Filter for ConfItem::status.
555 * @return First matching ConfItem from \a lp.
557 struct ConfItem* find_conf_byname(struct SLink* lp, const char* name,
560 struct ConfItem* tmp;
563 if (HOSTLEN < strlen(name))
566 for (; lp; lp = lp->next) {
567 tmp = lp->value.aconf;
568 if (0 != (tmp->status & statmask)) {
569 assert(0 != tmp->name);
570 if (0 == ircd_strcmp(tmp->name, name) || 0 == match(tmp->name, name))
577 /** Find a ConfItem from a list that has a host that matches \a host.
578 * @param lp List to search in.
579 * @param host Filter for ConfItem::host field; matches as a glob.
580 * @param statmask Filter for ConfItem::status.
581 * @return First matching ConfItem from \a lp.
583 struct ConfItem* find_conf_byhost(struct SLink* lp, const char* host,
586 struct ConfItem* tmp = NULL;
589 if (HOSTLEN < strlen(host))
592 for (; lp; lp = lp->next) {
593 tmp = lp->value.aconf;
594 if (0 != (tmp->status & statmask)) {
595 assert(0 != tmp->host);
596 if (0 == match(tmp->host, host))
603 /** Find a ConfItem from a list that has an address equal to \a ip.
604 * @param lp List to search in.
605 * @param ip Filter for ConfItem::address field; matches exactly.
606 * @param statmask Filter for ConfItem::status.
607 * @return First matching ConfItem from \a lp.
609 struct ConfItem* find_conf_byip(struct SLink* lp, const struct irc_in_addr* ip,
612 struct ConfItem* tmp;
614 for (; lp; lp = lp->next) {
615 tmp = lp->value.aconf;
616 if (0 != (tmp->status & statmask)
617 && !irc_in_addr_cmp(&tmp->address.addr, ip))
623 /** Free all CRules from #cruleConfList. */
624 void conf_erase_crule_list(void)
626 struct CRuleConf* next;
627 struct CRuleConf* p = cruleConfList;
629 for ( ; p; p = next) {
631 crule_free(&p->node);
639 /** Return #cruleConfList.
640 * @return #cruleConfList
642 const struct CRuleConf* conf_get_crule_list(void)
644 return cruleConfList;
647 /** Free all deny rules from #denyConfList. */
648 void conf_erase_deny_list(void)
650 struct DenyConf* next;
651 struct DenyConf* p = denyConfList;
652 for ( ; p; p = next) {
662 /** Return #denyConfList.
663 * @return #denyConfList
665 const struct DenyConf* conf_get_deny_list(void)
670 /** Find any existing quarantine for the named channel.
671 * @param chname Channel name to search for.
672 * @return Reason for channel's quarantine, or NULL if none exists.
675 find_quarantine(const char *chname)
679 for (qline = GlobalQuarantineList; qline; qline = qline->next)
680 if (!ircd_strcmp(qline->chname, chname))
681 return qline->reason;
685 /** Free all qline structs from #GlobalQuarantineList. */
686 void clear_quarantines(void)
689 while ((qline = GlobalQuarantineList))
691 GlobalQuarantineList = qline->next;
692 MyFree(qline->reason);
693 MyFree(qline->chname);
698 /** When non-zero, indicates that a configuration error has been seen in this pass. */
699 static int conf_error;
700 /** When non-zero, indicates that the configuration file was loaded at least once. */
701 static int conf_already_read;
703 extern void yyparse(void);
704 extern void init_lexer(void);
706 /** Read configuration file.
707 * @return Zero on failure, non-zero on success. */
708 int read_configuration_file(void)
711 feature_unmark(); /* unmark all features for resetting later */
712 /* Now just open an fd. The buffering isn't really needed... */
717 feature_mark(); /* reset unmarked features */
718 conf_already_read = 1;
722 /** Report an error message about the configuration file.
723 * @param msg The error to report.
726 yyerror(const char *msg)
728 sendto_opmask_butone(0, SNO_ALL, "Config file parse error line %d: %s",
730 log_write(LS_CONFIG, L_ERROR, 0, "Config file parse error line %d: %s",
732 if (!conf_already_read)
733 fprintf(stderr, "Config file parse error line %d: %s\n", lineno, msg);
737 /** Attach CONF_UWORLD items to a server and everything attached to it. */
739 attach_conf_uworld(struct Client *cptr)
743 attach_confs_byhost(cptr, cli_name(cptr), CONF_UWORLD);
744 for (lp = cli_serv(cptr)->down; lp; lp = lp->next)
745 attach_conf_uworld(lp->value.cptr);
748 /** Reload the configuration file.
749 * @param cptr Client that requested rehash (if a signal, &me).
750 * @param sig Type of rehash (0 = oper-requested, 1 = signal, 2 =
751 * oper-requested but do not restart resolver)
752 * @return CPTR_KILLED if any client was K/G-lined because of the
753 * rehash; otherwise 0.
755 int rehash(struct Client *cptr, int sig)
757 struct ConfItem** tmp = &GlobalConfList;
758 struct ConfItem* tmp2;
759 struct Client* acptr;
765 sendto_opmask_butone(0, SNO_OLDSNO,
766 "Got signal SIGHUP, reloading ircd conf. file");
768 while ((tmp2 = *tmp)) {
771 * Configuration entry is still in use by some
772 * local clients, cannot delete it--mark it so
773 * that it will be deleted when the last client
776 if (CONF_CLIENT == (tmp2->status & CONF_CLIENT))
782 tmp2->status |= CONF_ILLEGAL;
789 conf_erase_crule_list();
790 conf_erase_deny_list();
794 * delete the juped nicks list
804 mark_listeners_closing();
805 iauth_mark_closing();
807 read_configuration_file();
809 log_reopen(); /* reopen log files */
811 iauth_close_unused();
813 class_delete_marked(); /* unless it fails */
816 * Flush out deleted I and P lines although still in use.
818 for (tmp = &GlobalConfList; (tmp2 = *tmp);) {
819 if (CONF_ILLEGAL == (tmp2->status & CONF_ILLEGAL)) {
829 for (i = 0; i <= HighestFd; i++) {
830 if ((acptr = LocalClientArray[i])) {
831 assert(!IsMe(acptr));
833 det_confs_butmask(acptr, ~(CONF_UWORLD | CONF_ILLEGAL));
834 /* Because admin's are getting so uppity about people managing to
835 * get past K/G's etc, we'll "fix" the bug by actually explaining
838 if ((found_g = find_kill(acptr))) {
839 sendto_opmask_butone(0, found_g == -2 ? SNO_GLINE : SNO_OPERKILL,
840 found_g == -2 ? "G-line active for %s%s" :
841 "K-line active for %s%s",
842 IsUnknown(acptr) ? "Unregistered Client ":"",
843 get_client_name(acptr, SHOW_IP));
844 if (exit_client(cptr, acptr, &me, found_g == -2 ? "G-lined" :
845 "K-lined") == CPTR_KILLED)
851 attach_conf_uworld(&me);
856 /** Read configuration file for the very first time.
857 * @return Non-zero on success, zero on failure.
862 if (read_configuration_file()) {
864 * make sure we're sane to start if the config
865 * file read didn't get everything we need.
866 * XXX - should any of these abort the server?
867 * TODO: add warning messages
869 if (0 == localConf.name || 0 == localConf.numeric)
874 if (0 == localConf.location1)
875 DupString(localConf.location1, "");
876 if (0 == localConf.location2)
877 DupString(localConf.location2, "");
878 if (0 == localConf.contact)
879 DupString(localConf.contact, "");
886 /** Searches for a K/G-line for a client. If one is found, notify the
887 * user and disconnect them.
888 * @param cptr Client to search for.
889 * @return 0 if client is accepted; -1 if client was locally denied
890 * (K-line); -2 if client was globally denied (G-line).
892 int find_kill(struct Client *cptr)
896 const char* realname;
897 struct DenyConf* deny;
898 struct Gline* agline = NULL;
905 host = cli_sockhost(cptr);
906 name = cli_user(cptr)->username;
907 realname = cli_info(cptr);
909 assert(strlen(host) <= HOSTLEN);
910 assert((name ? strlen(name) : 0) <= HOSTLEN);
911 assert((realname ? strlen(realname) : 0) <= REALLEN);
913 /* 2000-07-14: Rewrote this loop for massive speed increases.
916 for (deny = denyConfList; deny; deny = deny->next) {
917 if (0 != match(deny->usermask, name))
920 if (EmptyString(deny->hostmask))
923 if (deny->flags & DENY_FLAGS_REALNAME) { /* K: by real name */
924 if (0 == match(deny->hostmask + 2, realname))
926 } else if (deny->flags & DENY_FLAGS_IP) { /* k: by IP */
928 char tbuf1[SOCKIPLEN], tbuf2[SOCKIPLEN];
929 Debug((DEBUG_DEBUG, "ip: %s network: %s/%u",
930 ircd_ntoa_r(tbuf1, &cli_ip(cptr)), ircd_ntoa_r(tbuf2, &deny->address), deny->bits));
932 if (ipmask_check(&cli_ip(cptr), &deny->address, deny->bits))
935 else if (0 == match(deny->hostmask, host))
939 if (EmptyString(deny->message))
940 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
941 ":Connection from your host is refused on this server.");
943 if (deny->flags & DENY_FLAGS_FILE)
944 killcomment(cptr, deny->message);
946 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", deny->message);
949 else if ((agline = gline_lookup(cptr, 0))) {
952 * added a check against the user's IP address to find_gline() -Kev
954 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", GlineReason(agline));
965 /** Attempt to attach Client blocks to \a cptr. If attach_iline()
966 * fails for the client, emit a debugging message.
967 * @param cptr Client to check for access.
968 * @return Access check result.
970 enum AuthorizationCheckResult conf_check_client(struct Client *cptr)
972 enum AuthorizationCheckResult acr = ACR_OK;
974 if ((acr = attach_iline(cptr))) {
975 Debug((DEBUG_DNS, "ch_cl: access denied: %s[%s]",
976 cli_name(cptr), cli_sockhost(cptr)));
982 /** Check access for a server given its name (passed in cptr struct).
983 * Must check for all C/N lines which have a name which matches the
984 * name given and a host which matches. A host alias which is the
985 * same as the server name is also acceptable in the host field of a
987 * @param cptr Peer server to check.
988 * @return 0 if accepted, -1 if access denied.
990 int conf_check_server(struct Client *cptr)
992 struct ConfItem* c_conf = NULL;
995 Debug((DEBUG_DNS, "sv_cl: check access for %s[%s]",
996 cli_name(cptr), cli_sockhost(cptr)));
998 if (IsUnknown(cptr) && !attach_confs_byname(cptr, cli_name(cptr), CONF_SERVER)) {
999 Debug((DEBUG_DNS, "No C/N lines for %s", cli_sockhost(cptr)));
1002 lp = cli_confs(cptr);
1004 * We initiated this connection so the client should have a C and N
1005 * line already attached after passing through the connect_server()
1008 if (IsConnecting(cptr) || IsHandshake(cptr)) {
1009 c_conf = find_conf_byname(lp, cli_name(cptr), CONF_SERVER);
1011 sendto_opmask_butone(0, SNO_OLDSNO, "Connect Error: lost C:line for %s",
1013 det_confs_butmask(cptr, 0);
1019 if (cli_dns_reply(cptr)) {
1020 struct DNSReply* hp = cli_dns_reply(cptr);
1021 const char* name = hp->h_name;
1023 * If we are missing a C or N line from above, search for
1024 * it under all known hostnames we have for this ip#.
1026 if ((c_conf = find_conf_byhost(lp, hp->h_name, CONF_SERVER)))
1027 ircd_strncpy(cli_sockhost(cptr), name, HOSTLEN);
1029 c_conf = find_conf_byip(lp, &hp->addr, CONF_SERVER);
1033 * Check for C lines with the hostname portion the ip number
1034 * of the host the server runs on. This also checks the case where
1035 * there is a server connecting from 'localhost'.
1037 c_conf = find_conf_byhost(lp, cli_sockhost(cptr), CONF_SERVER);
1041 * Attach by IP# only if all other checks have failed.
1042 * It is quite possible to get here with the strange things that can
1043 * happen when using DNS in the way the irc server does. -avalon
1046 c_conf = find_conf_byip(lp, &cli_ip(cptr), CONF_SERVER);
1048 * detach all conf lines that got attached by attach_confs()
1050 det_confs_butmask(cptr, 0);
1052 * if no Connect block, then deny access
1055 Debug((DEBUG_DNS, "sv_cl: access denied: %s[%s@%s]",
1056 cli_name(cptr), cli_username(cptr), cli_sockhost(cptr)));
1060 * attach the Connect block to the client structure for later use.
1062 attach_conf(cptr, c_conf);
1064 if (!irc_in_addr_valid(&c_conf->address.addr))
1065 memcpy(&c_conf->address.addr, &cli_ip(cptr), sizeof(c_conf->address.addr));
1067 Debug((DEBUG_DNS, "sv_cl: access ok: %s[%s]",
1068 cli_name(cptr), cli_sockhost(cptr)));