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 hostent* hp)
207 struct ConfItem* aconf = (struct ConfItem*) vptr;
209 aconf->dns_pending = 0;
211 memcpy(&aconf->ipnum, hp->h_addr, sizeof(struct in_addr));
217 * conf_dns_lookup - do a nameserver lookup of the conf host
218 * if the conf entry is currently doing a ns lookup do nothing, otherwise
219 * if the lookup returns a null pointer, set the conf dns_pending flag
221 static void conf_dns_lookup(struct ConfItem* aconf)
223 if (!aconf->dns_pending) {
224 char buf[HOSTLEN + 1];
225 struct DNSQuery query;
227 query.callback = conf_dns_callback;
228 host_from_uh(buf, aconf->host, HOSTLEN);
231 gethost_byname(buf, &query);
232 aconf->dns_pending = 1;
240 * Do (start) DNS lookups of all hostnames in the conf line and convert
241 * an IP addresses in a.b.c.d number for to IP#s.
244 lookup_confhost(struct ConfItem *aconf)
246 if (EmptyString(aconf->host) || EmptyString(aconf->name)) {
247 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
248 aconf->host, aconf->name));
252 * Do name lookup now on hostnames given and store the
253 * ip numbers in conf structure.
255 if (IsDigit(*aconf->host)) {
257 * rfc 1035 sez host names may not start with a digit
258 * XXX - this has changed code needs to be updated
260 aconf->ipnum.s_addr = inet_addr(aconf->host);
261 if (INADDR_NONE == aconf->ipnum.s_addr) {
262 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
263 aconf->host, aconf->name));
267 conf_dns_lookup(aconf);
271 * conf_find_server - find a server by name or hostname
272 * returns a server conf item pointer if found, 0 otherwise
274 * NOTE: at some point when we don't have to scan the entire
275 * list it may be cheaper to look for server names and host
276 * names in separate loops (original code did it that way)
278 struct ConfItem* conf_find_server(const char* name)
280 struct ConfItem* conf;
283 for (conf = GlobalConfList; conf; conf = conf->next) {
284 if (CONF_SERVER == conf->status) {
286 * Check first servernames, then try hostnames.
287 * XXX - match returns 0 if there _is_ a match... guess they
288 * haven't decided what true is yet
290 if (0 == match(name, conf->name))
298 * conf_eval_crule - evaluate connection rules
299 * returns the name of the rule triggered if found, 0 otherwise
301 * Evaluate connection rules... If no rules found, allow the
302 * connect. Otherwise stop with the first true rule (ie: rules
303 * are ored together. Oper connects are effected only by D
304 * lines (CRULE_ALL) not d lines (CRULE_AUTO).
306 const char* conf_eval_crule(const char* name, int mask)
308 struct CRuleConf* p = cruleConfList;
311 for ( ; p; p = p->next) {
312 if (0 != (p->type & mask) && 0 == match(p->hostmask, name)) {
313 if (crule_eval(p->node))
321 * Remove all conf entries from the client except those which match
322 * the status field mask.
324 void det_confs_butmask(struct Client* cptr, int mask)
330 for (link = cli_confs(cptr); link; link = next) {
332 if ((link->value.aconf->status & mask) == 0)
333 detach_conf(cptr, link->value.aconf);
338 * check_limit_and_attach - check client limits and attach I:line
340 * Made it accept 1 charactor, and 2 charactor limits (0->99 now),
341 * and dislallow more than 255 people here as well as in ipcheck.
342 * removed the old "ONE" scheme too.
343 * -- Isomer 2000-06-22
345 static enum AuthorizationCheckResult
346 check_limit_and_attach(struct Client* cptr, struct ConfItem* aconf)
351 if (IsDigit(*aconf->passwd) && !aconf->passwd[1])
352 number = *aconf->passwd-'0';
353 else if (IsDigit(*aconf->passwd) && IsDigit(aconf->passwd[1]) &&
355 number = (*aconf->passwd-'0')*10+(aconf->passwd[1]-'0');
357 if (IPcheck_nr(cptr) > number)
358 return ACR_TOO_MANY_FROM_IP;
359 return attach_conf(cptr, aconf);
363 * Find the first (best) I line to attach.
365 enum AuthorizationCheckResult attach_iline(struct Client* cptr)
367 struct ConfItem* aconf;
370 static char uhost[HOSTLEN + USERLEN + 3];
371 static char fullname[HOSTLEN + 1];
372 struct hostent* hp = 0;
376 if (cli_dns_reply(cptr))
377 hp = cli_dns_reply(cptr);
379 for (aconf = GlobalConfList; aconf; aconf = aconf->next) {
380 if (aconf->status != CONF_CLIENT)
382 if (aconf->port && aconf->port != cli_listener(cptr)->port)
384 if (!aconf->host || !aconf->name)
387 for (i = 0, hname = hp->h_name; hname; hname = hp->h_aliases[i++]) {
388 ircd_strncpy(fullname, hname, HOSTLEN);
389 fullname[HOSTLEN] = '\0';
391 Debug((DEBUG_DNS, "a_il: %s->%s", cli_sockhost(cptr), fullname));
393 if (strchr(aconf->name, '@')) {
394 strcpy(uhost, cli_username(cptr));
399 strncat(uhost, fullname, sizeof(uhost) - 1 - strlen(uhost));
400 uhost[sizeof(uhost) - 1] = 0;
401 if (0 == match(aconf->name, uhost)) {
402 if (strchr(uhost, '@'))
403 SetFlag(cptr, FLAG_DOID);
404 return check_limit_and_attach(cptr, aconf);
408 if (strchr(aconf->host, '@')) {
409 ircd_strncpy(uhost, cli_username(cptr), sizeof(uhost) - 2);
410 uhost[sizeof(uhost) - 2] = 0;
415 strncat(uhost, cli_sock_ip(cptr), sizeof(uhost) - 1 - strlen(uhost));
416 uhost[sizeof(uhost) - 1] = 0;
417 if (match(aconf->host, uhost))
419 if (strchr(uhost, '@'))
420 SetFlag(cptr, FLAG_DOID);
422 return check_limit_and_attach(cptr, aconf);
424 return ACR_NO_AUTHORIZATION;
427 static int is_attached(struct ConfItem *aconf, struct Client *cptr)
431 for (lp = cli_confs(cptr); lp; lp = lp->next) {
432 if (lp->value.aconf == aconf)
441 * Associate a specific configuration entry to a *local*
442 * client (this is the one which used in accepting the
443 * connection). Note, that this automaticly changes the
444 * attachment if there was an old one...
446 enum AuthorizationCheckResult attach_conf(struct Client *cptr, struct ConfItem *aconf)
450 if (is_attached(aconf, cptr))
451 return ACR_ALREADY_AUTHORIZED;
452 if (IsIllegal(aconf))
453 return ACR_NO_AUTHORIZATION;
454 if ((aconf->status & (CONF_LOCOP | CONF_OPERATOR | CONF_CLIENT)) &&
455 ConfLinks(aconf) >= ConfMaxLinks(aconf) && ConfMaxLinks(aconf) > 0)
456 return ACR_TOO_MANY_IN_CLASS; /* Use this for printing error message */
458 lp->next = cli_confs(cptr);
459 lp->value.aconf = aconf;
460 cli_confs(cptr) = lp;
462 if (aconf->status & CONF_CLIENT_MASK)
467 const struct LocalConf* conf_get_local(void)
473 * attach_confs_byname
475 * Attach a CONF line to a client if the name passed matches that for
476 * the conf file (for non-C/N lines) or is an exact match (C/N lines
477 * only). The difference in behaviour is to stop C:*::* and N:*::*.
479 struct ConfItem* attach_confs_byname(struct Client* cptr, const char* name,
482 struct ConfItem* tmp;
483 struct ConfItem* first = NULL;
487 if (HOSTLEN < strlen(name))
490 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
491 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
492 assert(0 != tmp->name);
493 if (0 == match(tmp->name, name) || 0 == ircd_strcmp(tmp->name, name)) {
494 if (ACR_OK == attach_conf(cptr, tmp) && !first)
503 * Added for new access check meLazy
505 struct ConfItem* attach_confs_byhost(struct Client* cptr, const char* host,
508 struct ConfItem* tmp;
509 struct ConfItem* first = 0;
512 if (HOSTLEN < strlen(host))
515 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
516 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
517 assert(0 != tmp->host);
518 if (0 == match(tmp->host, host) || 0 == ircd_strcmp(tmp->host, host)) {
519 if (ACR_OK == attach_conf(cptr, tmp) && !first)
528 * find a conf entry which matches the hostname and has the same name.
530 struct ConfItem* find_conf_exact(const char* name, const char* user,
531 const char* host, int statmask)
533 struct ConfItem *tmp;
534 char userhost[USERLEN + HOSTLEN + 3];
537 ircd_snprintf(0, userhost, sizeof(userhost), "%s@%s", user, host);
539 ircd_strncpy(userhost, host, sizeof(userhost) - 1);
541 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
542 if (!(tmp->status & statmask) || !tmp->name || !tmp->host ||
543 0 != ircd_strcmp(tmp->name, name))
546 * Accept if the *real* hostname (usually sockecthost)
547 * socket host) matches *either* host or name field
548 * of the configuration.
550 if (match(tmp->host, userhost))
552 if (tmp->status & (CONF_OPERATOR | CONF_LOCOP)) {
553 if (tmp->clients < MaxLinks(tmp->conn_class))
564 struct ConfItem* find_conf_byname(struct SLink* lp, const char* name,
567 struct ConfItem* tmp;
570 if (HOSTLEN < strlen(name))
573 for (; lp; lp = lp->next) {
574 tmp = lp->value.aconf;
575 if (0 != (tmp->status & statmask)) {
576 assert(0 != tmp->name);
577 if (0 == ircd_strcmp(tmp->name, name) || 0 == match(tmp->name, name))
585 * Added for new access check meLazy
587 struct ConfItem* find_conf_byhost(struct SLink* lp, const char* host,
590 struct ConfItem* tmp = NULL;
593 if (HOSTLEN < strlen(host))
596 for (; lp; lp = lp->next) {
597 tmp = lp->value.aconf;
598 if (0 != (tmp->status & statmask)) {
599 assert(0 != tmp->host);
600 if (0 == match(tmp->host, host))
610 * Find a conf line using the IP# stored in it to search upon.
611 * Added 1/8/92 by Avalon.
613 struct ConfItem* find_conf_byip(struct SLink* lp, const char* ip,
616 struct ConfItem* tmp;
618 for (; lp; lp = lp->next) {
619 tmp = lp->value.aconf;
620 if (0 != (tmp->status & statmask)) {
621 if (0 == memcmp(&tmp->ipnum, ip, sizeof(struct in_addr)))
631 * - looks for a match on all given fields.
634 static struct ConfItem *find_conf_entry(struct ConfItem *aconf,
637 struct ConfItem *bconf;
640 mask &= ~CONF_ILLEGAL;
642 for (bconf = GlobalConfList; bconf; bconf = bconf->next) {
643 if (!(bconf->status & mask) || (bconf->port != aconf->port))
646 if ((EmptyString(bconf->host) && !EmptyString(aconf->host)) ||
647 (EmptyString(aconf->host) && !EmptyString(bconf->host)))
649 if (!EmptyString(bconf->host) && 0 != ircd_strcmp(bconf->host, aconf->host))
652 if ((EmptyString(bconf->passwd) && !EmptyString(aconf->passwd)) ||
653 (EmptyString(aconf->passwd) && !EmptyString(bconf->passwd)))
655 if (!EmptyString(bconf->passwd) && (!IsDigit(*bconf->passwd) || bconf->passwd[1])
656 && 0 != ircd_strcmp(bconf->passwd, aconf->passwd))
659 if ((EmptyString(bconf->name) && !EmptyString(aconf->name)) ||
660 (EmptyString(aconf->name) && !EmptyString(bconf->name)))
662 if (!EmptyString(bconf->name) && 0 != ircd_strcmp(bconf->name, aconf->name))
670 * If conf line is a class definition, create a class entry
671 * for it and make the conf_line illegal and delete it.
673 void conf_add_class(const char* const* fields, int count)
677 add_class(atoi(fields[1]), atoi(fields[2]), atoi(fields[3]),
678 atoi(fields[4]), atoi(fields[5]));
681 void conf_add_listener(const char* const* fields, int count)
689 if (count < 5 || EmptyString(fields[4]))
692 if (!EmptyString(fields[3])) {
693 const char* x = fields[3];
694 if ('S' == ToUpper(*x))
697 if ('H' == ToUpper(*x))
700 /* port vhost mask */
701 add_listener(atoi(fields[4]), fields[2], fields[1], is_server, is_hidden);
704 void conf_add_local(const char* const* fields, int count)
706 if (count < 6 || EmptyString(fields[1]) || EmptyString(fields[5])) {
707 log_write(LS_CONFIG, L_CRIT, 0, "Your M: line must have 6 fields!");
711 * these two can only be set the first time
713 if (0 == localConf.name) {
714 if (string_is_hostname(fields[1]))
715 DupString(localConf.name, fields[1]);
717 if (0 == localConf.numeric) {
718 localConf.numeric = atoi(fields[5]);
719 if (0 == localConf.numeric)
720 log_write(LS_CONFIG, L_WARNING, 0,
721 "Your M: line must have a Numeric value greater than 0");
724 * these two can be changed while the server is running
726 if (string_is_address(fields[2])) {
727 if (INADDR_NONE == (localConf.vhost_address.s_addr = inet_addr(fields[2])))
728 localConf.vhost_address.s_addr = INADDR_ANY;
730 MyFree(localConf.description);
731 DupString(localConf.description, fields[3]);
733 * XXX - shouldn't be setting these directly here
735 ircd_strncpy(cli_info(&me), fields[3], REALLEN);
736 set_virtual_host(localConf.vhost_address);
739 void conf_add_admin(const char* const* fields, int count)
742 * if you have one, it MUST have 3 lines
745 log_write(LS_CONFIG, L_CRIT, 0, "Your A: line must have 4 fields!");
748 MyFree(localConf.location1);
749 DupString(localConf.location1, fields[1]);
751 MyFree(localConf.location2);
752 DupString(localConf.location2, fields[2]);
754 MyFree(localConf.contact);
755 DupString(localConf.contact, fields[3]);
759 * conf_add_crule - Create expression tree from connect rule and add it
762 void conf_add_crule(const char* const* fields, int count, int type)
764 struct CRuleNode* node;
767 if (count < 4 || EmptyString(fields[1]) || EmptyString(fields[3]))
770 if ((node = crule_parse(fields[3]))) {
771 struct CRuleConf* p = (struct CRuleConf*) MyMalloc(sizeof(struct CRuleConf));
774 DupString(p->hostmask, fields[1]);
775 collapse(p->hostmask);
777 DupString(p->rule, fields[3]);
781 p->next = cruleConfList;
787 void conf_erase_crule_list(void)
789 struct CRuleConf* next;
790 struct CRuleConf* p = cruleConfList;
792 for ( ; p; p = next) {
794 crule_free(&p->node);
802 const struct CRuleConf* conf_get_crule_list(void)
804 return cruleConfList;
808 void conf_add_server(const char* const* fields, int count)
810 struct ServerConf* server;
814 * missing host, password, or alias?
816 if (count < 6 || EmptyString(fields[1]) || EmptyString(fields[2]) || EmptyString(fields[3]))
821 if (string_is_hostname(fields[1]))
822 addr.s_addr = INADDR_NONE;
823 else if (INADDR_NONE == (addr.s_addr = inet_addr(fields[1])))
826 server = (struct ServerConf*) MyMalloc(sizeof(struct ServerConf));
828 DupString(server->hostname, fields[1]);
829 DupString(server->passwd, fields[2]);
830 DupString(server->alias, fields[3]);
831 server->address.s_addr = addr.s_addr;
832 server->port = atoi(fields[4]);
833 server->dns_pending = 0;
834 server->connected = 0;
836 server->conn_class = find_class(atoi(fields[5]));
838 server->next = serverConfList;
839 serverConfList = server;
841 /* if (INADDR_NONE == server->address.s_addr) */
842 /* lookup_confhost(server); */
845 void conf_add_deny(const char* const* fields, int count, int ip_kill)
847 struct DenyConf* conf;
849 if (count < 4 || EmptyString(fields[1]) || EmptyString(fields[3]))
852 conf = (struct DenyConf*) MyMalloc(sizeof(struct DenyConf));
854 memset(conf, 0, sizeof(struct DenyConf));
856 if (fields[1][0] == '$' && fields[1][1] == 'R')
857 conf->flags |= DENY_FLAGS_REALNAME;
859 DupString(conf->hostmask, fields[1]);
860 collapse(conf->hostmask);
862 if (!EmptyString(fields[2])) {
863 const char* p = fields[2];
865 conf->flags |= DENY_FLAGS_FILE;
868 DupString(conf->message, p);
870 DupString(conf->usermask, fields[3]);
871 collapse(conf->usermask);
875 * Here we use the same kludge as in listener.c to parse
876 * a.b.c.d, or a.b.c.*, or a.b.c.d/e.
882 c_class = sscanf(conf->hostmask, "%d.%d.%d.%d/%d",
883 &ad[0], &ad[1], &ad[2], &ad[3], &bits2);
885 conf->bits = c_class * 8;
890 ircd_snprintf(0, ipname, sizeof(ipname), "%d.%d.%d.%d", ad[0], ad[1],
894 * This ensures endian correctness
896 conf->address = inet_addr(ipname);
897 Debug((DEBUG_DEBUG, "IPkill: %s = %08x/%i (%08x)", ipname,
898 conf->address, conf->bits, NETMASK(conf->bits)));
899 conf->flags |= DENY_FLAGS_IP;
901 conf->next = denyConfList;
907 void conf_erase_deny_list(void)
909 struct DenyConf* next;
910 struct DenyConf* p = denyConfList;
911 for ( ; p; p = next) {
921 const struct DenyConf* conf_get_deny_list(void)
927 void conf_add_quarantine(const char *chname, const char *reason)
931 qline = (struct qline *) MyMalloc(sizeof(struct qline));
932 DupString(qline->chname, chname);
933 DupString(qline->reason, reason);
934 qline->next = GlobalQuarantineList;
935 GlobalQuarantineList = qline;
940 find_quarantine(const char *chname)
944 for (qline = GlobalQuarantineList; qline; qline = qline->next)
945 if (!ircd_strcmp(qline->chname, chname))
946 return qline->reason;
950 void clear_quarantines(void)
953 while ((qline = GlobalQuarantineList))
955 GlobalQuarantineList = qline->next;
956 MyFree(qline->reason);
957 MyFree(qline->chname);
964 * read_configuration_file
966 * Read configuration file.
968 * returns 0, if file cannot be opened
972 #define MAXCONFLINKS 150
975 void init_lexer(void);
977 int read_configuration_file(void)
979 feature_unmark(); /* unmark all features for resetting later */
980 /* Now just open an fd. The buffering isn't really needed... */
985 feature_mark(); /* reset unmarked features */
990 yyerror(const char *msg)
992 sendto_opmask_butone(0, SNO_ALL, "Config file parse error line %d: %s",
994 log_write(LS_CONFIG, L_ERROR, 0, "Config file parse error line %d: %s",
1001 * Actual REHASH service routine. Called with sig == 0 if it has been called
1002 * as a result of an operator issuing this command, else assume it has been
1003 * called as a result of the server receiving a HUP signal.
1005 int rehash(struct Client *cptr, int sig)
1007 struct ConfItem** tmp = &GlobalConfList;
1008 struct ConfItem* tmp2;
1009 struct Client* acptr;
1015 sendto_opmask_butone(0, SNO_OLDSNO,
1016 "Got signal SIGHUP, reloading ircd conf. file");
1018 while ((tmp2 = *tmp)) {
1019 if (tmp2->clients) {
1021 * Configuration entry is still in use by some
1022 * local clients, cannot delete it--mark it so
1023 * that it will be deleted when the last client
1026 if (CONF_CLIENT == (tmp2->status & CONF_CLIENT))
1032 tmp2->status |= CONF_ILLEGAL;
1039 conf_erase_crule_list();
1040 conf_erase_deny_list();
1044 * delete the juped nicks list
1051 class_mark_delete();
1052 mark_listeners_closing();
1054 read_configuration_file();
1056 log_reopen(); /* reopen log files */
1059 class_delete_marked(); /* unless it fails */
1062 * Flush out deleted I and P lines although still in use.
1064 for (tmp = &GlobalConfList; (tmp2 = *tmp);) {
1065 if (CONF_ILLEGAL == (tmp2->status & CONF_ILLEGAL)) {
1075 for (i = 0; i <= HighestFd; i++) {
1076 if ((acptr = LocalClientArray[i])) {
1077 assert(!IsMe(acptr));
1078 if (IsServer(acptr)) {
1079 det_confs_butmask(acptr,
1080 ~(CONF_HUB | CONF_LEAF | CONF_UWORLD | CONF_ILLEGAL));
1081 attach_confs_byname(acptr, cli_name(acptr),
1082 CONF_HUB | CONF_LEAF | CONF_UWORLD);
1084 /* Because admin's are getting so uppity about people managing to
1085 * get past K/G's etc, we'll "fix" the bug by actually explaining
1088 if ((found_g = find_kill(acptr))) {
1089 sendto_opmask_butone(0, found_g == -2 ? SNO_GLINE : SNO_OPERKILL,
1090 found_g == -2 ? "G-line active for %s%s" :
1091 "K-line active for %s%s",
1092 IsUnknown(acptr) ? "Unregistered Client ":"",
1093 get_client_name(acptr, HIDE_IP));
1094 if (exit_client(cptr, acptr, &me, found_g == -2 ? "G-lined" :
1095 "K-lined") == CPTR_KILLED)
1107 * Read configuration file.
1109 * returns 0, if file cannot be opened
1115 if (read_configuration_file()) {
1117 * make sure we're sane to start if the config
1118 * file read didn't get everything we need.
1119 * XXX - should any of these abort the server?
1120 * TODO: add warning messages
1122 if (0 == localConf.name || 0 == localConf.numeric)
1125 if (0 == localConf.location1)
1126 DupString(localConf.location1, "");
1127 if (0 == localConf.location2)
1128 DupString(localConf.location2, "");
1129 if (0 == localConf.contact)
1130 DupString(localConf.contact, "");
1142 * 0: Client may continue to try and connect
1143 * -1: Client was K/k:'d - sideeffect: reason was sent.
1144 * -2: Client was G/g:'d - sideeffect: reason was sent.
1146 * Client may have been sent a reason why they are denied, as above.
1148 int find_kill(struct Client *cptr)
1152 const char* realname;
1153 struct DenyConf* deny;
1154 struct Gline* agline = NULL;
1158 if (!cli_user(cptr))
1161 host = cli_sockhost(cptr);
1162 name = cli_user(cptr)->username;
1163 realname = cli_info(cptr);
1165 assert(strlen(host) <= HOSTLEN);
1166 assert((name ? strlen(name) : 0) <= HOSTLEN);
1167 assert((realname ? strlen(realname) : 0) <= REALLEN);
1169 /* 2000-07-14: Rewrote this loop for massive speed increases.
1172 for (deny = denyConfList; deny; deny = deny->next) {
1173 if (0 != match(deny->usermask, name))
1176 if (EmptyString(deny->hostmask))
1179 if (deny->flags & DENY_FLAGS_REALNAME) { /* K: by real name */
1180 if (0 == match(deny->hostmask, realname))
1182 } else if (deny->flags & DENY_FLAGS_IP) { /* k: by IP */
1183 Debug((DEBUG_DEBUG, "ip: %08x network: %08x/%i mask: %08x",
1184 cli_ip(cptr).s_addr, deny->address, deny->bits, NETMASK(deny->bits)));
1185 if ((cli_ip(cptr).s_addr & NETMASK(deny->bits)) == deny->address)
1188 else if (0 == match(deny->hostmask, host))
1192 if (EmptyString(deny->message))
1193 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
1194 ":Connection from your host is refused on this server.");
1196 if (deny->flags & DENY_FLAGS_FILE)
1197 killcomment(cptr, deny->message);
1199 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", deny->message);
1202 else if ((agline = gline_lookup(cptr, 0)) && GlineIsActive(agline)) {
1204 * find active glines
1205 * added a check against the user's IP address to find_gline() -Kev
1207 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", GlineReason(agline));
1210 agline = 0; /* if a gline was found, it was inactive */
1221 * Ordinary client access check. Look for conf lines which have the same
1222 * status as the flags passed.
1224 enum AuthorizationCheckResult conf_check_client(struct Client *cptr)
1226 enum AuthorizationCheckResult acr = ACR_OK;
1230 if ((acr = attach_iline(cptr))) {
1231 Debug((DEBUG_DNS, "ch_cl: access denied: %s[%s]",
1232 cli_name(cptr), cli_sockhost(cptr)));
1241 * Check access for a server given its name (passed in cptr struct).
1242 * Must check for all C/N lines which have a name which matches the
1243 * name given and a host which matches. A host alias which is the
1244 * same as the server name is also acceptable in the host field of a
1249 * -1 = Access denied
1252 int conf_check_server(struct Client *cptr)
1254 struct ConfItem* c_conf = NULL;
1257 Debug((DEBUG_DNS, "sv_cl: check access for %s[%s]",
1258 cli_name(cptr), cli_sockhost(cptr)));
1260 if (IsUnknown(cptr) && !attach_confs_byname(cptr, cli_name(cptr), CONF_SERVER)) {
1261 Debug((DEBUG_DNS, "No C/N lines for %s", cli_sockhost(cptr)));
1264 lp = cli_confs(cptr);
1266 * We initiated this connection so the client should have a C and N
1267 * line already attached after passing through the connect_server()
1270 if (IsConnecting(cptr) || IsHandshake(cptr)) {
1271 c_conf = find_conf_byname(lp, cli_name(cptr), CONF_SERVER);
1273 sendto_opmask_butone(0, SNO_OLDSNO, "Connect Error: lost C:line for %s",
1275 det_confs_butmask(cptr, 0);
1283 if (cli_dns_reply(cptr)) {
1285 struct hostent* hp = cli_dns_reply(cptr);
1286 const char* name = hp->h_name;
1288 * If we are missing a C or N line from above, search for
1289 * it under all known hostnames we have for this ip#.
1291 for (i = 0; name; name = hp->h_aliases[i++]) {
1292 if ((c_conf = find_conf_byhost(lp, name, CONF_SERVER))) {
1293 ircd_strncpy(cli_sockhost(cptr), name, HOSTLEN);
1298 for (i = 0; hp->h_addr_list[i]; i++) {
1299 if ((c_conf = find_conf_byip(lp, hp->h_addr_list[i], CONF_SERVER)))
1306 * Check for C lines with the hostname portion the ip number
1307 * of the host the server runs on. This also checks the case where
1308 * there is a server connecting from 'localhost'.
1310 c_conf = find_conf_byhost(lp, cli_sockhost(cptr), CONF_SERVER);
1314 * Attach by IP# only if all other checks have failed.
1315 * It is quite possible to get here with the strange things that can
1316 * happen when using DNS in the way the irc server does. -avalon
1319 c_conf = find_conf_byip(lp, (const char*) &(cli_ip(cptr)), CONF_SERVER);
1321 * detach all conf lines that got attached by attach_confs()
1323 det_confs_butmask(cptr, 0);
1325 * if no C or no N lines, then deny access
1328 Debug((DEBUG_DNS, "sv_cl: access denied: %s[%s@%s]",
1329 cli_name(cptr), cli_username(cptr), cli_sockhost(cptr)));
1332 ircd_strncpy(cli_name(cptr), c_conf->name, HOSTLEN);
1334 * attach the C and N lines to the client structure for later use.
1336 attach_conf(cptr, c_conf);
1337 attach_confs_byname(cptr, cli_name(cptr), CONF_HUB | CONF_LEAF | CONF_UWORLD);
1339 if (INADDR_NONE == c_conf->ipnum.s_addr)
1340 c_conf->ipnum.s_addr = cli_ip(cptr).s_addr;
1342 Debug((DEBUG_DNS, "sv_cl: access ok: %s[%s]",
1343 cli_name(cptr), cli_sockhost(cptr)));