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"
61 #include <arpa/inet.h>
71 /** Global list of all ConfItem structures. */
72 struct ConfItem *GlobalConfList;
73 /** Count of items in #GlobalConfLis. */
75 /** Global list of service mappings. */
76 struct s_map *GlobalServiceMapList;
77 /** Global list of channel quarantines. */
78 struct qline *GlobalQuarantineList;
80 /** Current line number in scanner input. */
83 /** Configuration information for #me. */
84 struct LocalConf localConf;
85 /** Global list of connection rules. */
86 struct CRuleConf* cruleConfList;
87 /** Global list of K-lines. */
88 struct DenyConf* denyConfList;
90 /** Tell a user that they are banned, dumping the message from a file.
91 * @param sptr Client being rejected
92 * @param filename Send this file's contents to \a sptr
94 static void killcomment(struct Client* sptr, const char* filename)
101 if (NULL == (file = fbopen(filename, "r"))) {
102 send_reply(sptr, ERR_NOMOTD);
103 send_reply(sptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
104 ":Connection from your host is refused on this server.");
108 tm = localtime((time_t*) &sb.st_mtime); /* NetBSD needs cast */
109 while (fbgets(line, sizeof(line) - 1, file)) {
110 char* end = line + strlen(line);
113 if ('\n' == *end || '\r' == *end)
118 send_reply(sptr, RPL_MOTD, line);
120 send_reply(sptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
121 ":Connection from your host is refused on this server.");
125 /** Allocate a new struct ConfItem.
126 * @return Newly allocated structure.
128 struct ConfItem* make_conf(void)
130 struct ConfItem* aconf;
132 aconf = (struct ConfItem*) MyMalloc(sizeof(struct ConfItem));
137 memset(aconf, 0, sizeof(struct ConfItem));
138 aconf->status = CONF_ILLEGAL;
142 /** Free a struct ConfItem and any resources it owns.
143 * @param aconf Item to free.
145 void free_conf(struct ConfItem *aconf)
147 Debug((DEBUG_DEBUG, "free_conf: %s %s %d",
148 aconf->host ? aconf->host : "*",
149 aconf->name ? aconf->name : "*",
150 aconf->address.port));
151 if (aconf->dns_pending)
152 delete_resolver_queries(aconf);
155 memset(aconf->passwd, 0, strlen(aconf->passwd));
156 MyFree(aconf->passwd);
164 /** Disassociate configuration from the client.
165 * @param cptr Client to operate on.
166 * @param aconf ConfItem to detach.
168 static void detach_conf(struct Client* cptr, struct ConfItem* aconf)
175 assert(0 < aconf->clients);
177 lp = &(cli_confs(cptr));
180 if ((*lp)->value.aconf == aconf) {
181 if (aconf->conn_class && (aconf->status & CONF_CLIENT_MASK) && ConfLinks(aconf) > 0)
184 assert(0 < aconf->clients);
185 if (0 == --aconf->clients && IsIllegal(aconf))
196 /** Copies a completed DNS query into its ConfItem.
197 * @param vptr Pointer to struct ConfItem for the block.
198 * @param hp DNS reply, or NULL if the lookup failed.
200 static void conf_dns_callback(void* vptr, struct DNSReply* hp)
202 struct ConfItem* aconf = (struct ConfItem*) vptr;
204 aconf->dns_pending = 0;
206 memcpy(&aconf->address.addr, &hp->addr, sizeof(aconf->address.addr));
211 /** Start a nameserver lookup of the conf host. If the conf entry is
212 * currently doing a lookup, do nothing.
213 * @param aconf ConfItem for which to start a request.
215 static void conf_dns_lookup(struct ConfItem* aconf)
217 if (!aconf->dns_pending) {
218 char buf[HOSTLEN + 1];
219 struct DNSQuery query;
221 query.callback = conf_dns_callback;
222 host_from_uh(buf, aconf->host, HOSTLEN);
225 gethost_byname(buf, &query);
226 aconf->dns_pending = 1;
231 /** Start lookups of all addresses in the conf line. The origin must
232 * be a numeric IP address. If the remote host field is not an IP
233 * address, start a DNS lookup for it.
234 * @param aconf Connection to do lookups for.
237 lookup_confhost(struct ConfItem *aconf)
239 if (EmptyString(aconf->host) || EmptyString(aconf->name)) {
240 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
241 aconf->host, aconf->name));
244 if (aconf->origin_name
245 && !ircd_aton(&aconf->origin.addr, aconf->origin_name)) {
246 Debug((DEBUG_ERROR, "Origin name error: (%s) (%s)",
247 aconf->origin_name, aconf->name));
250 * Do name lookup now on hostnames given and store the
251 * ip numbers in conf structure.
253 if (IsIP6Char(*aconf->host)) {
254 if (!ircd_aton(&aconf->address.addr, aconf->host)) {
255 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
256 aconf->host, aconf->name));
260 conf_dns_lookup(aconf);
263 /** Find a server by name or hostname.
264 * @param name Server name to find.
265 * @return Pointer to the corresponding ConfItem, or NULL if none exists.
267 struct ConfItem* conf_find_server(const char* name)
269 struct ConfItem* conf;
272 for (conf = GlobalConfList; conf; conf = conf->next) {
273 if (CONF_SERVER == conf->status) {
275 * Check first servernames, then try hostnames.
276 * XXX - match returns 0 if there _is_ a match... guess they
277 * haven't decided what true is yet
279 if (0 == match(name, conf->name))
286 /** Evaluate connection rules.
287 * @param name Name of server to check
288 * @param mask Filter for CRule types (only consider if type & \a mask != 0).
289 * @return Name of rule that forbids the connection; NULL if no prohibitions.
291 const char* conf_eval_crule(const char* name, int mask)
293 struct CRuleConf* p = cruleConfList;
296 for ( ; p; p = p->next) {
297 if (0 != (p->type & mask) && 0 == match(p->hostmask, name)) {
298 if (crule_eval(p->node))
305 /** Remove all conf entries from the client except those which match
306 * the status field mask.
307 * @param cptr Client to operate on.
308 * @param mask ConfItem types to keep.
310 void det_confs_butmask(struct Client* cptr, int mask)
316 for (link = cli_confs(cptr); link; link = next) {
318 if ((link->value.aconf->status & mask) == 0)
319 detach_conf(cptr, link->value.aconf);
323 /** Check client limits and attach Client block.
324 * If the password field consists of one or two digits, use that
325 * as the per-IP connection limit; otherwise use 255.
326 * @param cptr Client getting \a aconf.
327 * @param aconf Configuration item to attach.
328 * @return Authorization check result.
330 static enum AuthorizationCheckResult
331 check_limit_and_attach(struct Client* cptr, struct ConfItem* aconf)
336 if (IsDigit(*aconf->passwd) && !aconf->passwd[1])
337 number = *aconf->passwd-'0';
338 else if (IsDigit(*aconf->passwd) && IsDigit(aconf->passwd[1]) &&
340 number = (*aconf->passwd-'0')*10+(aconf->passwd[1]-'0');
342 if (IPcheck_nr(cptr) > number)
343 return ACR_TOO_MANY_FROM_IP;
344 return attach_conf(cptr, aconf);
347 /** Find the first (best) Client block to attach.
348 * @param cptr Client for whom to check rules.
349 * @return Authorization check result.
351 enum AuthorizationCheckResult attach_iline(struct Client* cptr)
353 struct ConfItem* aconf;
354 static char uhost[HOSTLEN + USERLEN + 3];
355 static char fullname[HOSTLEN + 1];
360 hp = cli_dns_reply(cptr);
361 for (aconf = GlobalConfList; aconf; aconf = aconf->next) {
362 if (aconf->status != CONF_CLIENT)
364 if (aconf->address.port && aconf->address.port != cli_listener(cptr)->addr.port)
366 if (!aconf->host || !aconf->name)
369 ircd_strncpy(fullname, hp->h_name, HOSTLEN);
370 fullname[HOSTLEN] = '\0';
372 Debug((DEBUG_DNS, "a_il: %s->%s", cli_sockhost(cptr), fullname));
374 if (strchr(aconf->name, '@')) {
375 strcpy(uhost, cli_username(cptr));
380 strncat(uhost, fullname, sizeof(uhost) - 1 - strlen(uhost));
381 uhost[sizeof(uhost) - 1] = 0;
382 if (0 == match(aconf->name, uhost)) {
383 if (strchr(uhost, '@'))
384 SetFlag(cptr, FLAG_DOID);
385 return check_limit_and_attach(cptr, aconf);
388 if (strchr(aconf->host, '@')) {
389 ircd_strncpy(uhost, cli_username(cptr), sizeof(uhost) - 2);
390 uhost[sizeof(uhost) - 2] = 0;
395 strncat(uhost, cli_sock_ip(cptr), sizeof(uhost) - 1 - strlen(uhost));
396 uhost[sizeof(uhost) - 1] = 0;
397 if (match(aconf->host, uhost))
399 if (strchr(uhost, '@'))
400 SetFlag(cptr, FLAG_DOID);
402 return check_limit_and_attach(cptr, aconf);
404 return ACR_NO_AUTHORIZATION;
407 /** Check whether a particular ConfItem is already attached to a
409 * @param aconf ConfItem to search for
410 * @param cptr Client to check
411 * @return Non-zero if \a aconf is attached to \a cptr, zero if not.
413 static int is_attached(struct ConfItem *aconf, struct Client *cptr)
417 for (lp = cli_confs(cptr); lp; lp = lp->next) {
418 if (lp->value.aconf == aconf)
424 /** Associate a specific configuration entry to a *local* client (this
425 * is the one which used in accepting the connection). Note, that this
426 * automaticly changes the attachment if there was an old one...
427 * @param cptr Client to attach \a aconf to
428 * @param aconf ConfItem to attach
429 * @return Authorization check result.
431 enum AuthorizationCheckResult attach_conf(struct Client *cptr, struct ConfItem *aconf)
435 if (is_attached(aconf, cptr))
436 return ACR_ALREADY_AUTHORIZED;
437 if (IsIllegal(aconf))
438 return ACR_NO_AUTHORIZATION;
439 if ((aconf->status & (CONF_OPERATOR | CONF_CLIENT)) &&
440 ConfLinks(aconf) >= ConfMaxLinks(aconf) && ConfMaxLinks(aconf) > 0)
441 return ACR_TOO_MANY_IN_CLASS; /* Use this for printing error message */
443 lp->next = cli_confs(cptr);
444 lp->value.aconf = aconf;
445 cli_confs(cptr) = lp;
447 if (aconf->status & CONF_CLIENT_MASK)
452 /** Return our LocalConf configuration structure.
453 * @return A pointer to #localConf.
455 const struct LocalConf* conf_get_local(void)
460 /** Attach ConfItems to a client if the name passed matches that for
461 * the ConfItems or is an exact match for them.
462 * @param cptr Client getting the ConfItem attachments.
463 * @param name Filter to match ConfItem::name.
464 * @param statmask Filter to limit ConfItem::status.
465 * @return First ConfItem attached to \a cptr.
467 struct ConfItem* attach_confs_byname(struct Client* cptr, const char* name,
470 struct ConfItem* tmp;
471 struct ConfItem* first = NULL;
475 if (HOSTLEN < strlen(name))
478 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
479 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
480 assert(0 != tmp->name);
481 if (0 == match(tmp->name, name) || 0 == ircd_strcmp(tmp->name, name)) {
482 if (ACR_OK == attach_conf(cptr, tmp) && !first)
490 /** Attach ConfItems to a client if the host passed matches that for
491 * the ConfItems or is an exact match for them.
492 * @param cptr Client getting the ConfItem attachments.
493 * @param host Filter to match ConfItem::host.
494 * @param statmask Filter to limit ConfItem::status.
495 * @return First ConfItem attached to \a cptr.
497 struct ConfItem* attach_confs_byhost(struct Client* cptr, const char* host,
500 struct ConfItem* tmp;
501 struct ConfItem* first = 0;
504 if (HOSTLEN < strlen(host))
507 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
508 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
509 assert(0 != tmp->host);
510 if (0 == match(tmp->host, host) || 0 == ircd_strcmp(tmp->host, host)) {
511 if (ACR_OK == attach_conf(cptr, tmp) && !first)
519 /** Find a ConfItem that has the same name and user+host fields as
520 * specified. Requires an exact match for \a name.
521 * @param name Name to match
522 * @param user User part of match (or NULL)
523 * @param host Hostname part of match
524 * @param statmask Filter for ConfItem::status
525 * @return First found matching ConfItem.
527 struct ConfItem* find_conf_exact(const char* name, const char* user,
528 const char* host, int statmask)
530 struct ConfItem *tmp;
531 char userhost[USERLEN + HOSTLEN + 3];
534 ircd_snprintf(0, userhost, sizeof(userhost), "%s@%s", user, host);
536 ircd_strncpy(userhost, host, sizeof(userhost) - 1);
538 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
539 if (!(tmp->status & statmask) || !tmp->name || !tmp->host ||
540 0 != ircd_strcmp(tmp->name, name))
543 * Accept if the *real* hostname (usually sockecthost)
544 * socket host) matches *either* host or name field
545 * of the configuration.
547 if (match(tmp->host, userhost))
549 if (tmp->status & CONF_OPERATOR) {
550 if (tmp->clients < MaxLinks(tmp->conn_class))
561 /** Find a ConfItem from a list that has a name that matches \a name.
562 * @param lp List to search in.
563 * @param name Filter for ConfItem::name field; matches either exactly
565 * @param statmask Filter for ConfItem::status.
566 * @return First matching ConfItem from \a lp.
568 struct ConfItem* find_conf_byname(struct SLink* lp, const char* name,
571 struct ConfItem* tmp;
574 if (HOSTLEN < strlen(name))
577 for (; lp; lp = lp->next) {
578 tmp = lp->value.aconf;
579 if (0 != (tmp->status & statmask)) {
580 assert(0 != tmp->name);
581 if (0 == ircd_strcmp(tmp->name, name) || 0 == match(tmp->name, name))
588 /** Find a ConfItem from a list that has a host that matches \a host.
589 * @param lp List to search in.
590 * @param host Filter for ConfItem::host field; matches as a glob.
591 * @param statmask Filter for ConfItem::status.
592 * @return First matching ConfItem from \a lp.
594 struct ConfItem* find_conf_byhost(struct SLink* lp, const char* host,
597 struct ConfItem* tmp = NULL;
600 if (HOSTLEN < strlen(host))
603 for (; lp; lp = lp->next) {
604 tmp = lp->value.aconf;
605 if (0 != (tmp->status & statmask)) {
606 assert(0 != tmp->host);
607 if (0 == match(tmp->host, host))
614 /** Find a ConfItem from a list that has an address equal to \a ip.
615 * @param lp List to search in.
616 * @param ip Filter for ConfItem::address field; matches exactly.
617 * @param statmask Filter for ConfItem::status.
618 * @return First matching ConfItem from \a lp.
620 struct ConfItem* find_conf_byip(struct SLink* lp, const struct irc_in_addr* ip,
623 struct ConfItem* tmp;
625 for (; lp; lp = lp->next) {
626 tmp = lp->value.aconf;
627 if (0 != (tmp->status & statmask)
628 && !irc_in_addr_cmp(&tmp->address.addr, ip))
634 /** Free all CRules from #cruleConfList. */
635 void conf_erase_crule_list(void)
637 struct CRuleConf* next;
638 struct CRuleConf* p = cruleConfList;
640 for ( ; p; p = next) {
642 crule_free(&p->node);
650 /** Return #cruleConfList.
651 * @return #cruleConfList
653 const struct CRuleConf* conf_get_crule_list(void)
655 return cruleConfList;
658 /** Free all deny rules from #denyConfList. */
659 void conf_erase_deny_list(void)
661 struct DenyConf* next;
662 struct DenyConf* p = denyConfList;
663 for ( ; p; p = next) {
673 /** Return #denyConfList.
674 * @return #denyConfList
676 const struct DenyConf* conf_get_deny_list(void)
681 /** Find any existing quarantine for the named channel.
682 * @param chname Channel name to search for.
683 * @return Reason for channel's quarantine, or NULL if none exists.
686 find_quarantine(const char *chname)
690 for (qline = GlobalQuarantineList; qline; qline = qline->next)
691 if (!ircd_strcmp(qline->chname, chname))
692 return qline->reason;
696 /** Free all qline structs from #GlobalQuarantineList. */
697 void clear_quarantines(void)
700 while ((qline = GlobalQuarantineList))
702 GlobalQuarantineList = qline->next;
703 MyFree(qline->reason);
704 MyFree(qline->chname);
709 /** When non-zero, indicates that a configuration error has been seen in this pass. */
710 static int conf_error;
711 /** When non-zero, indicates that the configuration file was loaded at least once. */
712 static int conf_already_read;
714 extern void yyparse(void);
715 extern void init_lexer(void);
717 /** Read configuration file.
718 * @return Zero on failure, non-zero on success. */
719 int read_configuration_file(void)
722 feature_unmark(); /* unmark all features for resetting later */
723 /* Now just open an fd. The buffering isn't really needed... */
728 feature_mark(); /* reset unmarked features */
729 conf_already_read = 1;
733 /** Report an error message about the configuration file.
734 * @param msg The error to report.
737 yyerror(const char *msg)
739 sendto_opmask_butone(0, SNO_ALL, "Config file parse error line %d: %s",
741 log_write(LS_CONFIG, L_ERROR, 0, "Config file parse error line %d: %s",
743 if (!conf_already_read)
744 fprintf(stderr, "Config file parse error line %d: %s\n", lineno, msg);
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));
832 if (IsServer(acptr)) {
833 det_confs_butmask(acptr,
834 ~(CONF_HUB | CONF_LEAF | CONF_UWORLD | CONF_ILLEGAL));
835 attach_confs_byname(acptr, cli_name(acptr),
836 CONF_HUB | CONF_LEAF | CONF_UWORLD);
838 /* Because admin's are getting so uppity about people managing to
839 * get past K/G's etc, we'll "fix" the bug by actually explaining
842 if ((found_g = find_kill(acptr))) {
843 sendto_opmask_butone(0, found_g == -2 ? SNO_GLINE : SNO_OPERKILL,
844 found_g == -2 ? "G-line active for %s%s" :
845 "K-line active for %s%s",
846 IsUnknown(acptr) ? "Unregistered Client ":"",
847 get_client_name(acptr, SHOW_IP));
848 if (exit_client(cptr, acptr, &me, found_g == -2 ? "G-lined" :
849 "K-lined") == CPTR_KILLED)
858 /** Read configuration file for the very first time.
859 * @return Non-zero on success, zero on failure.
864 if (read_configuration_file()) {
866 * make sure we're sane to start if the config
867 * file read didn't get everything we need.
868 * XXX - should any of these abort the server?
869 * TODO: add warning messages
871 if (0 == localConf.name || 0 == localConf.numeric)
876 if (0 == localConf.location1)
877 DupString(localConf.location1, "");
878 if (0 == localConf.location2)
879 DupString(localConf.location2, "");
880 if (0 == localConf.contact)
881 DupString(localConf.contact, "");
888 /** Searches for a K/G-line for a client. If one is found, notify the
889 * user and disconnect them.
890 * @param cptr Client to search for.
891 * @return 0 if client is accepted; -1 if client was locally denied
892 * (K-line); -2 if client was globally denied (G-line).
894 int find_kill(struct Client *cptr)
898 const char* realname;
899 struct DenyConf* deny;
900 struct Gline* agline = NULL;
907 host = cli_sockhost(cptr);
908 name = cli_user(cptr)->username;
909 realname = cli_info(cptr);
911 assert(strlen(host) <= HOSTLEN);
912 assert((name ? strlen(name) : 0) <= HOSTLEN);
913 assert((realname ? strlen(realname) : 0) <= REALLEN);
915 /* 2000-07-14: Rewrote this loop for massive speed increases.
918 for (deny = denyConfList; deny; deny = deny->next) {
919 if (0 != match(deny->usermask, name))
922 if (EmptyString(deny->hostmask))
925 if (deny->flags & DENY_FLAGS_REALNAME) { /* K: by real name */
926 if (0 == match(deny->hostmask + 2, realname))
928 } else if (deny->flags & DENY_FLAGS_IP) { /* k: by IP */
930 char tbuf1[SOCKIPLEN], tbuf2[SOCKIPLEN];
931 Debug((DEBUG_DEBUG, "ip: %s network: %s/%u",
932 ircd_ntoa_r(tbuf1, &cli_ip(cptr)), ircd_ntoa_r(tbuf2, &deny->address), deny->bits));
934 if (ipmask_check(&cli_ip(cptr), &deny->address, deny->bits))
937 else if (0 == match(deny->hostmask, host))
941 if (EmptyString(deny->message))
942 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
943 ":Connection from your host is refused on this server.");
945 if (deny->flags & DENY_FLAGS_FILE)
946 killcomment(cptr, deny->message);
948 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", deny->message);
951 else if ((agline = gline_lookup(cptr, 0))) {
954 * added a check against the user's IP address to find_gline() -Kev
956 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", GlineReason(agline));
967 /** Attempt to attach Client blocks to \a cptr. If attach_iline()
968 * fails for the client, emit a debugging message.
969 * @param cptr Client to check for access.
970 * @return Access check result.
972 enum AuthorizationCheckResult conf_check_client(struct Client *cptr)
974 enum AuthorizationCheckResult acr = ACR_OK;
978 if ((acr = attach_iline(cptr))) {
979 Debug((DEBUG_DNS, "ch_cl: access denied: %s[%s]",
980 cli_name(cptr), cli_sockhost(cptr)));
986 /** Check access for a server given its name (passed in cptr struct).
987 * Must check for all C/N lines which have a name which matches the
988 * name given and a host which matches. A host alias which is the
989 * same as the server name is also acceptable in the host field of a
991 * @param cptr Peer server to check.
992 * @return 0 if accepted, -1 if access denied.
994 int conf_check_server(struct Client *cptr)
996 struct ConfItem* c_conf = NULL;
999 Debug((DEBUG_DNS, "sv_cl: check access for %s[%s]",
1000 cli_name(cptr), cli_sockhost(cptr)));
1002 if (IsUnknown(cptr) && !attach_confs_byname(cptr, cli_name(cptr), CONF_SERVER)) {
1003 Debug((DEBUG_DNS, "No C/N lines for %s", cli_sockhost(cptr)));
1006 lp = cli_confs(cptr);
1008 * We initiated this connection so the client should have a C and N
1009 * line already attached after passing through the connect_server()
1012 if (IsConnecting(cptr) || IsHandshake(cptr)) {
1013 c_conf = find_conf_byname(lp, cli_name(cptr), CONF_SERVER);
1015 sendto_opmask_butone(0, SNO_OLDSNO, "Connect Error: lost C:line for %s",
1017 det_confs_butmask(cptr, 0);
1025 if (cli_dns_reply(cptr)) {
1026 struct DNSReply* hp = cli_dns_reply(cptr);
1027 const char* name = hp->h_name;
1029 * If we are missing a C or N line from above, search for
1030 * it under all known hostnames we have for this ip#.
1032 if ((c_conf = find_conf_byhost(lp, hp->h_name, CONF_SERVER)))
1033 ircd_strncpy(cli_sockhost(cptr), name, HOSTLEN);
1035 c_conf = find_conf_byip(lp, &hp->addr, CONF_SERVER);
1039 * Check for C lines with the hostname portion the ip number
1040 * of the host the server runs on. This also checks the case where
1041 * there is a server connecting from 'localhost'.
1043 c_conf = find_conf_byhost(lp, cli_sockhost(cptr), CONF_SERVER);
1047 * Attach by IP# only if all other checks have failed.
1048 * It is quite possible to get here with the strange things that can
1049 * happen when using DNS in the way the irc server does. -avalon
1052 c_conf = find_conf_byip(lp, &cli_ip(cptr), CONF_SERVER);
1054 * detach all conf lines that got attached by attach_confs()
1056 det_confs_butmask(cptr, 0);
1058 * if no C or no N lines, then deny access
1061 Debug((DEBUG_DNS, "sv_cl: access denied: %s[%s@%s]",
1062 cli_name(cptr), cli_username(cptr), cli_sockhost(cptr)));
1065 ircd_strncpy(cli_name(cptr), c_conf->name, HOSTLEN);
1067 * attach the C and N lines to the client structure for later use.
1069 attach_conf(cptr, c_conf);
1070 attach_confs_byname(cptr, cli_name(cptr), CONF_HUB | CONF_LEAF | CONF_UWORLD);
1072 if (!irc_in_addr_valid(&c_conf->address.addr))
1073 memcpy(&c_conf->address.addr, &cli_ip(cptr), sizeof(c_conf->address.addr));
1075 Debug((DEBUG_DNS, "sv_cl: access ok: %s[%s]",
1076 cli_name(cptr), cli_sockhost(cptr)));