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.
29 #include "ircd_features.h"
34 #include "ircd_alloc.h"
35 #include "ircd_chattr.h"
37 #include "ircd_reply.h"
38 #include "ircd_snprintf.h"
39 #include "ircd_string.h"
58 #include <arpa/inet.h>
69 #define INADDR_NONE 0xffffffff
72 struct ConfItem *GlobalConfList = 0;
73 int GlobalConfCount = 0;
74 struct qline *GlobalQuarantineList = 0;
79 struct LocalConf localConf;
80 struct CRuleConf* cruleConfList;
81 /* struct ServerConf* serverConfList; */
82 struct DenyConf* denyConfList;
85 * output the reason for being k lined from a file - Mmmm
86 * sptr is client being dumped
87 * filename is the file that is to be output to the K lined client
89 static void killcomment(struct Client* sptr, const char* filename)
96 if (NULL == (file = fbopen(filename, "r"))) {
97 send_reply(sptr, ERR_NOMOTD);
98 send_reply(sptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
99 ":Connection from your host is refused on this server.");
103 tm = localtime((time_t*) &sb.st_mtime); /* NetBSD needs cast */
104 while (fbgets(line, sizeof(line) - 1, file)) {
105 char* end = line + strlen(line);
108 if ('\n' == *end || '\r' == *end)
113 send_reply(sptr, RPL_MOTD, line);
115 send_reply(sptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
116 ":Connection from your host is refused on this server.");
120 struct ConfItem* make_conf(void)
122 struct ConfItem* aconf;
124 aconf = (struct ConfItem*) MyMalloc(sizeof(struct ConfItem));
129 memset(aconf, 0, sizeof(struct ConfItem));
130 aconf->status = CONF_ILLEGAL;
131 aconf->ipnum.s_addr = INADDR_NONE;
135 void delist_conf(struct ConfItem *aconf)
137 if (aconf == GlobalConfList)
138 GlobalConfList = GlobalConfList->next;
140 struct ConfItem *bconf;
142 for (bconf = GlobalConfList; aconf != bconf->next; bconf = bconf->next)
144 bconf->next = aconf->next;
149 void free_conf(struct ConfItem *aconf)
151 Debug((DEBUG_DEBUG, "free_conf: %s %s %d",
152 aconf->host ? aconf->host : "*",
153 aconf->name ? aconf->name : "*",
155 if (aconf->dns_pending)
156 delete_resolver_queries(aconf);
159 memset(aconf->passwd, 0, strlen(aconf->passwd));
160 MyFree(aconf->passwd);
169 * detach_conf - Disassociate configuration from the client.
171 static void detach_conf(struct Client* cptr, struct ConfItem* aconf)
178 assert(0 < aconf->clients);
180 lp = &(cli_confs(cptr));
183 if ((*lp)->value.aconf == aconf) {
184 if (aconf->conn_class && (aconf->status & CONF_CLIENT_MASK) && ConfLinks(aconf) > 0)
187 assert(0 < aconf->clients);
188 if (0 == --aconf->clients && IsIllegal(aconf))
200 * conf_dns_callback - called when resolver query finishes
201 * if the query resulted in a successful search, hp will contain
202 * a non-null pointer, otherwise hp will be null.
203 * if successful save hp in the conf item it was called with
205 static void conf_dns_callback(void* vptr, struct DNSReply* reply)
207 struct ConfItem* aconf = (struct ConfItem*) vptr;
208 aconf->dns_pending = 0;
210 memcpy(&aconf->ipnum, reply->hp->h_addr, sizeof(struct in_addr));
214 * conf_dns_lookup - do a nameserver lookup of the conf host
215 * if the conf entry is currently doing a ns lookup do nothing, otherwise
216 * if the lookup returns a null pointer, set the conf dns_pending flag
218 static struct DNSReply* conf_dns_lookup(struct ConfItem* aconf)
220 struct DNSReply* dns_reply = 0;
221 if (!aconf->dns_pending) {
222 char buf[HOSTLEN + 1];
223 struct DNSQuery query;
225 query.callback = conf_dns_callback;
226 host_from_uh(buf, aconf->host, HOSTLEN);
229 if (0 == (dns_reply = gethost_byname(buf, &query)))
230 aconf->dns_pending = 1;
239 * Do (start) DNS lookups of all hostnames in the conf line and convert
240 * an IP addresses in a.b.c.d number for to IP#s.
243 lookup_confhost(struct ConfItem *aconf)
245 struct DNSReply* reply;
247 if (EmptyString(aconf->host) || EmptyString(aconf->name)) {
248 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
249 aconf->host, aconf->name));
253 * Do name lookup now on hostnames given and store the
254 * ip numbers in conf structure.
256 if (IsDigit(*aconf->host)) {
258 * rfc 1035 sez host names may not start with a digit
259 * XXX - this has changed code needs to be updated
261 aconf->ipnum.s_addr = inet_addr(aconf->host);
262 if (INADDR_NONE == aconf->ipnum.s_addr) {
263 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
264 aconf->host, aconf->name));
267 else if ((reply = conf_dns_lookup(aconf)))
268 memcpy(&aconf->ipnum, reply->hp->h_addr, sizeof(struct in_addr));
272 * conf_find_server - find a server by name or hostname
273 * returns a server conf item pointer if found, 0 otherwise
275 * NOTE: at some point when we don't have to scan the entire
276 * list it may be cheaper to look for server names and host
277 * names in separate loops (original code did it that way)
279 struct ConfItem* conf_find_server(const char* name)
281 struct ConfItem* conf;
284 for (conf = GlobalConfList; conf; conf = conf->next) {
285 if (CONF_SERVER == conf->status) {
287 * Check first servernames, then try hostnames.
288 * XXX - match returns 0 if there _is_ a match... guess they
289 * haven't decided what true is yet
291 if (0 == match(name, conf->name))
299 * conf_eval_crule - evaluate connection rules
300 * returns the name of the rule triggered if found, 0 otherwise
302 * Evaluate connection rules... If no rules found, allow the
303 * connect. Otherwise stop with the first true rule (ie: rules
304 * are ored together. Oper connects are effected only by D
305 * lines (CRULE_ALL) not d lines (CRULE_AUTO).
307 const char* conf_eval_crule(const char* name, int mask)
309 struct CRuleConf* p = cruleConfList;
312 for ( ; p; p = p->next) {
313 if (0 != (p->type & mask) && 0 == match(p->hostmask, name)) {
314 if (crule_eval(p->node))
322 * Remove all conf entries from the client except those which match
323 * the status field mask.
325 void det_confs_butmask(struct Client* cptr, int mask)
331 for (link = cli_confs(cptr); link; link = next) {
333 if ((link->value.aconf->status & mask) == 0)
334 detach_conf(cptr, link->value.aconf);
339 * check_limit_and_attach - check client limits and attach I:line
341 * Made it accept 1 charactor, and 2 charactor limits (0->99 now),
342 * and dislallow more than 255 people here as well as in ipcheck.
343 * removed the old "ONE" scheme too.
344 * -- Isomer 2000-06-22
346 static enum AuthorizationCheckResult
347 check_limit_and_attach(struct Client* cptr, struct ConfItem* aconf)
352 if (IsDigit(*aconf->passwd) && !aconf->passwd[1])
353 number = *aconf->passwd-'0';
354 else if (IsDigit(*aconf->passwd) && IsDigit(aconf->passwd[1]) &&
356 number = (*aconf->passwd-'0')*10+(aconf->passwd[1]-'0');
358 if (IPcheck_nr(cptr) > number)
359 return ACR_TOO_MANY_FROM_IP;
360 return attach_conf(cptr, aconf);
364 * Find the first (best) I line to attach.
366 enum AuthorizationCheckResult attach_iline(struct Client* cptr)
368 struct ConfItem* aconf;
371 static char uhost[HOSTLEN + USERLEN + 3];
372 static char fullname[HOSTLEN + 1];
373 struct hostent* hp = 0;
377 if (cli_dns_reply(cptr))
378 hp = cli_dns_reply(cptr)->hp;
380 for (aconf = GlobalConfList; aconf; aconf = aconf->next) {
381 if (aconf->status != CONF_CLIENT)
383 if (aconf->port && aconf->port != cli_listener(cptr)->port)
385 if (!aconf->host || !aconf->name)
388 for (i = 0, hname = hp->h_name; hname; hname = hp->h_aliases[i++]) {
389 ircd_strncpy(fullname, hname, HOSTLEN);
390 fullname[HOSTLEN] = '\0';
392 Debug((DEBUG_DNS, "a_il: %s->%s", cli_sockhost(cptr), fullname));
394 if (strchr(aconf->name, '@')) {
395 strcpy(uhost, cli_username(cptr));
400 strncat(uhost, fullname, sizeof(uhost) - 1 - strlen(uhost));
401 uhost[sizeof(uhost) - 1] = 0;
402 if (0 == match(aconf->name, uhost)) {
403 if (strchr(uhost, '@'))
404 SetFlag(cptr, FLAG_DOID);
405 return check_limit_and_attach(cptr, aconf);
409 if (strchr(aconf->host, '@')) {
410 ircd_strncpy(uhost, cli_username(cptr), sizeof(uhost) - 2);
411 uhost[sizeof(uhost) - 2] = 0;
416 strncat(uhost, cli_sock_ip(cptr), sizeof(uhost) - 1 - strlen(uhost));
417 uhost[sizeof(uhost) - 1] = 0;
418 if (match(aconf->host, uhost))
420 if (strchr(uhost, '@'))
421 SetFlag(cptr, FLAG_DOID);
423 return check_limit_and_attach(cptr, aconf);
425 return ACR_NO_AUTHORIZATION;
428 static int is_attached(struct ConfItem *aconf, struct Client *cptr)
432 for (lp = cli_confs(cptr); lp; lp = lp->next) {
433 if (lp->value.aconf == aconf)
442 * Associate a specific configuration entry to a *local*
443 * client (this is the one which used in accepting the
444 * connection). Note, that this automaticly changes the
445 * attachment if there was an old one...
447 enum AuthorizationCheckResult attach_conf(struct Client *cptr, struct ConfItem *aconf)
451 if (is_attached(aconf, cptr))
452 return ACR_ALREADY_AUTHORIZED;
453 if (IsIllegal(aconf))
454 return ACR_NO_AUTHORIZATION;
455 if ((aconf->status & (CONF_LOCOP | CONF_OPERATOR | CONF_CLIENT)) &&
456 ConfLinks(aconf) >= ConfMaxLinks(aconf) && ConfMaxLinks(aconf) > 0)
457 return ACR_TOO_MANY_IN_CLASS; /* Use this for printing error message */
459 lp->next = cli_confs(cptr);
460 lp->value.aconf = aconf;
461 cli_confs(cptr) = lp;
463 if (aconf->status & CONF_CLIENT_MASK)
468 const struct LocalConf* conf_get_local(void)
474 * attach_confs_byname
476 * Attach a CONF line to a client if the name passed matches that for
477 * the conf file (for non-C/N lines) or is an exact match (C/N lines
478 * only). The difference in behaviour is to stop C:*::* and N:*::*.
480 struct ConfItem* attach_confs_byname(struct Client* cptr, const char* name,
483 struct ConfItem* tmp;
484 struct ConfItem* first = NULL;
488 if (HOSTLEN < strlen(name))
491 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
492 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
493 assert(0 != tmp->name);
494 if (0 == match(tmp->name, name) || 0 == ircd_strcmp(tmp->name, name)) {
495 if (ACR_OK == attach_conf(cptr, tmp) && !first)
504 * Added for new access check meLazy
506 struct ConfItem* attach_confs_byhost(struct Client* cptr, const char* host,
509 struct ConfItem* tmp;
510 struct ConfItem* first = 0;
513 if (HOSTLEN < strlen(host))
516 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
517 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
518 assert(0 != tmp->host);
519 if (0 == match(tmp->host, host) || 0 == ircd_strcmp(tmp->host, host)) {
520 if (ACR_OK == attach_conf(cptr, tmp) && !first)
529 * find a conf entry which matches the hostname and has the same name.
531 struct ConfItem* find_conf_exact(const char* name, const char* user,
532 const char* host, int statmask)
534 struct ConfItem *tmp;
535 char userhost[USERLEN + HOSTLEN + 3];
538 ircd_snprintf(0, userhost, sizeof(userhost), "%s@%s", user, host);
540 ircd_strncpy(userhost, host, sizeof(userhost) - 1);
542 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
543 if (!(tmp->status & statmask) || !tmp->name || !tmp->host ||
544 0 != ircd_strcmp(tmp->name, name))
547 * Accept if the *real* hostname (usually sockecthost)
548 * socket host) matches *either* host or name field
549 * of the configuration.
551 if (match(tmp->host, userhost))
553 if (tmp->status & (CONF_OPERATOR | CONF_LOCOP)) {
554 if (tmp->clients < MaxLinks(tmp->conn_class))
565 struct ConfItem* find_conf_byname(struct SLink* lp, const char* name,
568 struct ConfItem* tmp;
571 if (HOSTLEN < strlen(name))
574 for (; lp; lp = lp->next) {
575 tmp = lp->value.aconf;
576 if (0 != (tmp->status & statmask)) {
577 assert(0 != tmp->name);
578 if (0 == ircd_strcmp(tmp->name, name) || 0 == match(tmp->name, name))
586 * Added for new access check meLazy
588 struct ConfItem* find_conf_byhost(struct SLink* lp, const char* host,
591 struct ConfItem* tmp = NULL;
594 if (HOSTLEN < strlen(host))
597 for (; lp; lp = lp->next) {
598 tmp = lp->value.aconf;
599 if (0 != (tmp->status & statmask)) {
600 assert(0 != tmp->host);
601 if (0 == match(tmp->host, host))
611 * Find a conf line using the IP# stored in it to search upon.
612 * Added 1/8/92 by Avalon.
614 struct ConfItem* find_conf_byip(struct SLink* lp, const char* ip,
617 struct ConfItem* tmp;
619 for (; lp; lp = lp->next) {
620 tmp = lp->value.aconf;
621 if (0 != (tmp->status & statmask)) {
622 if (0 == memcmp(&tmp->ipnum, ip, sizeof(struct in_addr)))
632 * - looks for a match on all given fields.
635 static struct ConfItem *find_conf_entry(struct ConfItem *aconf,
638 struct ConfItem *bconf;
641 mask &= ~CONF_ILLEGAL;
643 for (bconf = GlobalConfList; bconf; bconf = bconf->next) {
644 if (!(bconf->status & mask) || (bconf->port != aconf->port))
647 if ((EmptyString(bconf->host) && !EmptyString(aconf->host)) ||
648 (EmptyString(aconf->host) && !EmptyString(bconf->host)))
650 if (!EmptyString(bconf->host) && 0 != ircd_strcmp(bconf->host, aconf->host))
653 if ((EmptyString(bconf->passwd) && !EmptyString(aconf->passwd)) ||
654 (EmptyString(aconf->passwd) && !EmptyString(bconf->passwd)))
656 if (!EmptyString(bconf->passwd) && (!IsDigit(*bconf->passwd) || bconf->passwd[1])
657 && 0 != ircd_strcmp(bconf->passwd, aconf->passwd))
660 if ((EmptyString(bconf->name) && !EmptyString(aconf->name)) ||
661 (EmptyString(aconf->name) && !EmptyString(bconf->name)))
663 if (!EmptyString(bconf->name) && 0 != ircd_strcmp(bconf->name, aconf->name))
671 * If conf line is a class definition, create a class entry
672 * for it and make the conf_line illegal and delete it.
674 void conf_add_class(const char* const* fields, int count)
678 add_class(atoi(fields[1]), atoi(fields[2]), atoi(fields[3]),
679 atoi(fields[4]), atoi(fields[5]));
682 void conf_add_listener(const char* const* fields, int count)
690 if (count < 5 || EmptyString(fields[4]))
693 if (!EmptyString(fields[3])) {
694 const char* x = fields[3];
695 if ('S' == ToUpper(*x))
698 if ('H' == ToUpper(*x))
701 /* port vhost mask */
702 add_listener(atoi(fields[4]), fields[2], fields[1], is_server, is_hidden);
705 void conf_add_local(const char* const* fields, int count)
707 if (count < 6 || EmptyString(fields[1]) || EmptyString(fields[5])) {
708 log_write(LS_CONFIG, L_CRIT, 0, "Your M: line must have 6 fields!");
712 * these two can only be set the first time
714 if (0 == localConf.name) {
715 if (string_is_hostname(fields[1]))
716 DupString(localConf.name, fields[1]);
718 if (0 == localConf.numeric) {
719 localConf.numeric = atoi(fields[5]);
720 if (0 == localConf.numeric)
721 log_write(LS_CONFIG, L_WARNING, 0,
722 "Your M: line must have a Numeric value greater than 0");
725 * these two can be changed while the server is running
727 if (string_is_address(fields[2])) {
728 if (INADDR_NONE == (localConf.vhost_address.s_addr = inet_addr(fields[2])))
729 localConf.vhost_address.s_addr = INADDR_ANY;
731 MyFree(localConf.description);
732 DupString(localConf.description, fields[3]);
734 * XXX - shouldn't be setting these directly here
736 ircd_strncpy(cli_info(&me), fields[3], REALLEN);
737 set_virtual_host(localConf.vhost_address);
740 void conf_add_admin(const char* const* fields, int count)
743 * if you have one, it MUST have 3 lines
746 log_write(LS_CONFIG, L_CRIT, 0, "Your A: line must have 4 fields!");
749 MyFree(localConf.location1);
750 DupString(localConf.location1, fields[1]);
752 MyFree(localConf.location2);
753 DupString(localConf.location2, fields[2]);
755 MyFree(localConf.contact);
756 DupString(localConf.contact, fields[3]);
760 * conf_add_crule - Create expression tree from connect rule and add it
763 void conf_add_crule(const char* const* fields, int count, int type)
765 struct CRuleNode* node;
768 if (count < 4 || EmptyString(fields[1]) || EmptyString(fields[3]))
771 if ((node = crule_parse(fields[3]))) {
772 struct CRuleConf* p = (struct CRuleConf*) MyMalloc(sizeof(struct CRuleConf));
775 DupString(p->hostmask, fields[1]);
776 collapse(p->hostmask);
778 DupString(p->rule, fields[3]);
782 p->next = cruleConfList;
788 void conf_erase_crule_list(void)
790 struct CRuleConf* next;
791 struct CRuleConf* p = cruleConfList;
793 for ( ; p; p = next) {
795 crule_free(&p->node);
803 const struct CRuleConf* conf_get_crule_list(void)
805 return cruleConfList;
809 void conf_add_server(const char* const* fields, int count)
811 struct ServerConf* server;
815 * missing host, password, or alias?
817 if (count < 6 || EmptyString(fields[1]) || EmptyString(fields[2]) || EmptyString(fields[3]))
822 if (string_is_hostname(fields[1]))
823 addr.s_addr = INADDR_NONE;
824 else if (INADDR_NONE == (addr.s_addr = inet_addr(fields[1])))
827 server = (struct ServerConf*) MyMalloc(sizeof(struct ServerConf));
829 DupString(server->hostname, fields[1]);
830 DupString(server->passwd, fields[2]);
831 DupString(server->alias, fields[3]);
832 server->address.s_addr = addr.s_addr;
833 server->port = atoi(fields[4]);
834 server->dns_pending = 0;
835 server->connected = 0;
837 server->conn_class = find_class(atoi(fields[5]));
839 server->next = serverConfList;
840 serverConfList = server;
842 /* if (INADDR_NONE == server->address.s_addr) */
843 /* lookup_confhost(server); */
846 void conf_add_deny(const char* const* fields, int count, int ip_kill)
848 struct DenyConf* conf;
850 if (count < 4 || EmptyString(fields[1]) || EmptyString(fields[3]))
853 conf = (struct DenyConf*) MyMalloc(sizeof(struct DenyConf));
855 memset(conf, 0, sizeof(struct DenyConf));
857 if (fields[1][0] == '$' && fields[1][1] == 'R')
858 conf->flags |= DENY_FLAGS_REALNAME;
860 DupString(conf->hostmask, fields[1]);
861 collapse(conf->hostmask);
863 if (!EmptyString(fields[2])) {
864 const char* p = fields[2];
866 conf->flags |= DENY_FLAGS_FILE;
869 DupString(conf->message, p);
871 DupString(conf->usermask, fields[3]);
872 collapse(conf->usermask);
876 * Here we use the same kludge as in listener.c to parse
877 * a.b.c.d, or a.b.c.*, or a.b.c.d/e.
883 c_class = sscanf(conf->hostmask, "%d.%d.%d.%d/%d",
884 &ad[0], &ad[1], &ad[2], &ad[3], &bits2);
886 conf->bits = c_class * 8;
891 ircd_snprintf(0, ipname, sizeof(ipname), "%d.%d.%d.%d", ad[0], ad[1],
895 * This ensures endian correctness
897 conf->address = inet_addr(ipname);
898 Debug((DEBUG_DEBUG, "IPkill: %s = %08x/%i (%08x)", ipname,
899 conf->address, conf->bits, NETMASK(conf->bits)));
900 conf->flags |= DENY_FLAGS_IP;
902 conf->next = denyConfList;
908 void conf_erase_deny_list(void)
910 struct DenyConf* next;
911 struct DenyConf* p = denyConfList;
912 for ( ; p; p = next) {
922 const struct DenyConf* conf_get_deny_list(void)
928 void conf_add_quarantine(const char *chname, const char *reason)
932 qline = (struct qline *) MyMalloc(sizeof(struct qline));
933 DupString(qline->chname, chname);
934 DupString(qline->reason, reason);
935 qline->next = GlobalQuarantineList;
936 GlobalQuarantineList = qline;
941 find_quarantine(const char *chname)
945 for (qline = GlobalQuarantineList; qline; qline = qline->next)
946 if (!ircd_strcmp(qline->chname, chname))
947 return qline->reason;
951 void clear_quarantines(void)
954 while ((qline = GlobalQuarantineList))
956 GlobalQuarantineList = qline->next;
957 MyFree(qline->reason);
958 MyFree(qline->chname);
965 * read_configuration_file
967 * Read configuration file.
969 * returns 0, if file cannot be opened
973 #define MAXCONFLINKS 150
976 void init_lexer(void);
978 int read_configuration_file(void)
980 feature_unmark(); /* unmark all features for resetting later */
981 /* Now just open an fd. The buffering isn't really needed... */
986 feature_mark(); /* reset unmarked features */
991 yyerror(const char *msg)
993 sendto_opmask_butone(0, SNO_ALL, "Config file parse error line %d: %s",
995 log_write(LS_CONFIG, L_ERROR, 0, "Config file parse error line %d: %s",
1002 * Actual REHASH service routine. Called with sig == 0 if it has been called
1003 * as a result of an operator issuing this command, else assume it has been
1004 * called as a result of the server receiving a HUP signal.
1006 int rehash(struct Client *cptr, int sig)
1008 struct ConfItem** tmp = &GlobalConfList;
1009 struct ConfItem* tmp2;
1010 struct Client* acptr;
1016 sendto_opmask_butone(0, SNO_OLDSNO,
1017 "Got signal SIGHUP, reloading ircd conf. file");
1019 while ((tmp2 = *tmp)) {
1020 if (tmp2->clients) {
1022 * Configuration entry is still in use by some
1023 * local clients, cannot delete it--mark it so
1024 * that it will be deleted when the last client
1027 if (CONF_CLIENT == (tmp2->status & CONF_CLIENT))
1033 tmp2->status |= CONF_ILLEGAL;
1040 conf_erase_crule_list();
1041 conf_erase_deny_list();
1045 * delete the juped nicks list
1050 flush_resolver_cache();
1052 class_mark_delete();
1053 mark_listeners_closing();
1055 read_configuration_file();
1057 log_reopen(); /* reopen log files */
1060 class_delete_marked(); /* unless it fails */
1063 * Flush out deleted I and P lines although still in use.
1065 for (tmp = &GlobalConfList; (tmp2 = *tmp);) {
1066 if (CONF_ILLEGAL == (tmp2->status & CONF_ILLEGAL)) {
1076 for (i = 0; i <= HighestFd; i++) {
1077 if ((acptr = LocalClientArray[i])) {
1078 assert(!IsMe(acptr));
1079 if (IsServer(acptr)) {
1080 det_confs_butmask(acptr,
1081 ~(CONF_HUB | CONF_LEAF | CONF_UWORLD | CONF_ILLEGAL));
1082 attach_confs_byname(acptr, cli_name(acptr),
1083 CONF_HUB | CONF_LEAF | CONF_UWORLD);
1085 /* Because admin's are getting so uppity about people managing to
1086 * get past K/G's etc, we'll "fix" the bug by actually explaining
1089 if ((found_g = find_kill(acptr))) {
1090 sendto_opmask_butone(0, found_g == -2 ? SNO_GLINE : SNO_OPERKILL,
1091 found_g == -2 ? "G-line active for %s%s" :
1092 "K-line active for %s%s",
1093 IsUnknown(acptr) ? "Unregistered Client ":"",
1094 get_client_name(acptr, HIDE_IP));
1095 if (exit_client(cptr, acptr, &me, found_g == -2 ? "G-lined" :
1096 "K-lined") == CPTR_KILLED)
1108 * Read configuration file.
1110 * returns 0, if file cannot be opened
1116 if (read_configuration_file()) {
1118 * make sure we're sane to start if the config
1119 * file read didn't get everything we need.
1120 * XXX - should any of these abort the server?
1121 * TODO: add warning messages
1123 if (0 == localConf.name || 0 == localConf.numeric)
1126 if (0 == localConf.location1)
1127 DupString(localConf.location1, "");
1128 if (0 == localConf.location2)
1129 DupString(localConf.location2, "");
1130 if (0 == localConf.contact)
1131 DupString(localConf.contact, "");
1143 * 0: Client may continue to try and connect
1144 * -1: Client was K/k:'d - sideeffect: reason was sent.
1145 * -2: Client was G/g:'d - sideeffect: reason was sent.
1147 * Client may have been sent a reason why they are denied, as above.
1149 int find_kill(struct Client *cptr)
1153 const char* realname;
1154 struct DenyConf* deny;
1155 struct Gline* agline = NULL;
1159 if (!cli_user(cptr))
1162 host = cli_sockhost(cptr);
1163 name = cli_user(cptr)->username;
1164 realname = cli_info(cptr);
1166 assert(strlen(host) <= HOSTLEN);
1167 assert((name ? strlen(name) : 0) <= HOSTLEN);
1168 assert((realname ? strlen(realname) : 0) <= REALLEN);
1170 /* 2000-07-14: Rewrote this loop for massive speed increases.
1173 for (deny = denyConfList; deny; deny = deny->next) {
1174 if (0 != match(deny->usermask, name))
1177 if (EmptyString(deny->hostmask))
1180 if (deny->flags & DENY_FLAGS_REALNAME) { /* K: by real name */
1181 if (0 == match(deny->hostmask, realname))
1183 } else if (deny->flags & DENY_FLAGS_IP) { /* k: by IP */
1184 Debug((DEBUG_DEBUG, "ip: %08x network: %08x/%i mask: %08x",
1185 cli_ip(cptr).s_addr, deny->address, deny->bits, NETMASK(deny->bits)));
1186 if ((cli_ip(cptr).s_addr & NETMASK(deny->bits)) == deny->address)
1189 else if (0 == match(deny->hostmask, host))
1193 if (EmptyString(deny->message))
1194 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
1195 ":Connection from your host is refused on this server.");
1197 if (deny->flags & DENY_FLAGS_FILE)
1198 killcomment(cptr, deny->message);
1200 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", deny->message);
1203 else if ((agline = gline_lookup(cptr, 0)) && GlineIsActive(agline)) {
1205 * find active glines
1206 * added a check against the user's IP address to find_gline() -Kev
1208 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", GlineReason(agline));
1211 agline = 0; /* if a gline was found, it was inactive */
1222 * Ordinary client access check. Look for conf lines which have the same
1223 * status as the flags passed.
1225 enum AuthorizationCheckResult conf_check_client(struct Client *cptr)
1227 enum AuthorizationCheckResult acr = ACR_OK;
1231 if ((acr = attach_iline(cptr))) {
1232 Debug((DEBUG_DNS, "ch_cl: access denied: %s[%s]",
1233 cli_name(cptr), cli_sockhost(cptr)));
1242 * Check access for a server given its name (passed in cptr struct).
1243 * Must check for all C/N lines which have a name which matches the
1244 * name given and a host which matches. A host alias which is the
1245 * same as the server name is also acceptable in the host field of a
1250 * -1 = Access denied
1253 int conf_check_server(struct Client *cptr)
1255 struct ConfItem* c_conf = NULL;
1258 Debug((DEBUG_DNS, "sv_cl: check access for %s[%s]",
1259 cli_name(cptr), cli_sockhost(cptr)));
1261 if (IsUnknown(cptr) && !attach_confs_byname(cptr, cli_name(cptr), CONF_SERVER)) {
1262 Debug((DEBUG_DNS, "No C/N lines for %s", cli_sockhost(cptr)));
1265 lp = cli_confs(cptr);
1267 * We initiated this connection so the client should have a C and N
1268 * line already attached after passing through the connect_server()
1271 if (IsConnecting(cptr) || IsHandshake(cptr)) {
1272 c_conf = find_conf_byname(lp, cli_name(cptr), CONF_SERVER);
1274 sendto_opmask_butone(0, SNO_OLDSNO, "Connect Error: lost C:line for %s",
1276 det_confs_butmask(cptr, 0);
1284 if (cli_dns_reply(cptr)) {
1286 struct hostent* hp = cli_dns_reply(cptr)->hp;
1287 const char* name = hp->h_name;
1289 * If we are missing a C or N line from above, search for
1290 * it under all known hostnames we have for this ip#.
1292 for (i = 0; name; name = hp->h_aliases[i++]) {
1293 if ((c_conf = find_conf_byhost(lp, name, CONF_SERVER))) {
1294 ircd_strncpy(cli_sockhost(cptr), name, HOSTLEN);
1299 for (i = 0; hp->h_addr_list[i]; i++) {
1300 if ((c_conf = find_conf_byip(lp, hp->h_addr_list[i], CONF_SERVER)))
1307 * Check for C lines with the hostname portion the ip number
1308 * of the host the server runs on. This also checks the case where
1309 * there is a server connecting from 'localhost'.
1311 c_conf = find_conf_byhost(lp, cli_sockhost(cptr), CONF_SERVER);
1315 * Attach by IP# only if all other checks have failed.
1316 * It is quite possible to get here with the strange things that can
1317 * happen when using DNS in the way the irc server does. -avalon
1320 c_conf = find_conf_byip(lp, (const char*) &(cli_ip(cptr)), CONF_SERVER);
1322 * detach all conf lines that got attached by attach_confs()
1324 det_confs_butmask(cptr, 0);
1326 * if no C or no N lines, then deny access
1329 Debug((DEBUG_DNS, "sv_cl: access denied: %s[%s@%s]",
1330 cli_name(cptr), cli_username(cptr), cli_sockhost(cptr)));
1333 ircd_strncpy(cli_name(cptr), c_conf->name, HOSTLEN);
1335 * attach the C and N lines to the client structure for later use.
1337 attach_conf(cptr, c_conf);
1338 attach_confs_byname(cptr, cli_name(cptr), CONF_HUB | CONF_LEAF | CONF_UWORLD);
1340 if (INADDR_NONE == c_conf->ipnum.s_addr)
1341 c_conf->ipnum.s_addr = cli_ip(cptr).s_addr;
1343 Debug((DEBUG_DNS, "sv_cl: access ok: %s[%s]", cli_name(cptr), cli_sockhost(cptr)));