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;
78 struct LocalConf localConf;
79 struct CRuleConf* cruleConfList;
80 /* struct ServerConf* serverConfList; */
81 struct DenyConf* denyConfList;
84 * output the reason for being k lined from a file - Mmmm
85 * sptr is client being dumped
86 * filename is the file that is to be output to the K lined client
88 static void killcomment(struct Client* sptr, const char* filename)
95 if (NULL == (file = fbopen(filename, "r"))) {
96 send_reply(sptr, ERR_NOMOTD);
97 send_reply(sptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
98 ":Connection from your host is refused on this server.");
102 tm = localtime((time_t*) &sb.st_mtime); /* NetBSD needs cast */
103 while (fbgets(line, sizeof(line) - 1, file)) {
104 char* end = line + strlen(line);
107 if ('\n' == *end || '\r' == *end)
112 send_reply(sptr, RPL_MOTD, line);
114 send_reply(sptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
115 ":Connection from your host is refused on this server.");
119 struct ConfItem* make_conf(void)
121 struct ConfItem* aconf;
123 aconf = (struct ConfItem*) MyMalloc(sizeof(struct ConfItem));
128 memset(aconf, 0, sizeof(struct ConfItem));
129 aconf->status = CONF_ILLEGAL;
130 aconf->ipnum.s_addr = INADDR_NONE;
134 void delist_conf(struct ConfItem *aconf)
136 if (aconf == GlobalConfList)
137 GlobalConfList = GlobalConfList->next;
139 struct ConfItem *bconf;
141 for (bconf = GlobalConfList; aconf != bconf->next; bconf = bconf->next)
143 bconf->next = aconf->next;
148 void free_conf(struct ConfItem *aconf)
150 Debug((DEBUG_DEBUG, "free_conf: %s %s %d",
151 aconf->host ? aconf->host : "*",
152 aconf->name ? aconf->name : "*",
154 if (aconf->dns_pending)
155 delete_resolver_queries(aconf);
158 memset(aconf->passwd, 0, strlen(aconf->passwd));
159 MyFree(aconf->passwd);
168 * detach_conf - Disassociate configuration from the client.
170 static void detach_conf(struct Client* cptr, struct ConfItem* aconf)
177 assert(0 < aconf->clients);
179 lp = &(cli_confs(cptr));
182 if ((*lp)->value.aconf == aconf) {
183 if (aconf->conn_class && (aconf->status & CONF_CLIENT_MASK) && ConfLinks(aconf) > 0)
186 assert(0 < aconf->clients);
187 if (0 == --aconf->clients && IsIllegal(aconf))
199 * conf_dns_callback - called when resolver query finishes
200 * if the query resulted in a successful search, hp will contain
201 * a non-null pointer, otherwise hp will be null.
202 * if successful save hp in the conf item it was called with
204 static void conf_dns_callback(void* vptr, struct DNSReply* reply)
206 struct ConfItem* aconf = (struct ConfItem*) vptr;
207 aconf->dns_pending = 0;
209 memcpy(&aconf->ipnum, reply->hp->h_addr, sizeof(struct in_addr));
213 * conf_dns_lookup - do a nameserver lookup of the conf host
214 * if the conf entry is currently doing a ns lookup do nothing, otherwise
215 * if the lookup returns a null pointer, set the conf dns_pending flag
217 static struct DNSReply* conf_dns_lookup(struct ConfItem* aconf)
219 struct DNSReply* dns_reply = 0;
220 if (!aconf->dns_pending) {
221 char buf[HOSTLEN + 1];
222 struct DNSQuery query;
224 query.callback = conf_dns_callback;
225 host_from_uh(buf, aconf->host, HOSTLEN);
228 if (0 == (dns_reply = gethost_byname(buf, &query)))
229 aconf->dns_pending = 1;
238 * Do (start) DNS lookups of all hostnames in the conf line and convert
239 * an IP addresses in a.b.c.d number for to IP#s.
241 void lookup_confhost(struct ConfItem *aconf)
243 struct DNSReply* reply;
245 if (EmptyString(aconf->host) || EmptyString(aconf->name)) {
246 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
247 aconf->host, aconf->name));
251 * Do name lookup now on hostnames given and store the
252 * ip numbers in conf structure.
254 if (IsDigit(*aconf->host)) {
256 * rfc 1035 sez host names may not start with a digit
257 * XXX - this has changed code needs to be updated
259 aconf->ipnum.s_addr = inet_addr(aconf->host);
260 if (INADDR_NONE == aconf->ipnum.s_addr) {
261 Debug((DEBUG_ERROR, "Host/server name error: (%s) (%s)",
262 aconf->host, aconf->name));
265 else if ((reply = conf_dns_lookup(aconf)))
266 memcpy(&aconf->ipnum, reply->hp->h_addr, sizeof(struct in_addr));
270 * conf_find_server - find a server by name or hostname
271 * returns a server conf item pointer if found, 0 otherwise
273 * NOTE: at some point when we don't have to scan the entire
274 * list it may be cheaper to look for server names and host
275 * names in separate loops (original code did it that way)
277 struct ConfItem* conf_find_server(const char* name)
279 struct ConfItem* conf;
282 for (conf = GlobalConfList; conf; conf = conf->next) {
283 if (CONF_SERVER == conf->status) {
285 * Check first servernames, then try hostnames.
286 * XXX - match returns 0 if there _is_ a match... guess they
287 * haven't decided what true is yet
289 if (0 == match(name, conf->name))
297 * conf_eval_crule - evaluate connection rules
298 * returns the name of the rule triggered if found, 0 otherwise
300 * Evaluate connection rules... If no rules found, allow the
301 * connect. Otherwise stop with the first true rule (ie: rules
302 * are ored together. Oper connects are effected only by D
303 * lines (CRULE_ALL) not d lines (CRULE_AUTO).
305 const char* conf_eval_crule(const char* name, int mask)
307 struct CRuleConf* p = cruleConfList;
310 for ( ; p; p = p->next) {
311 if (0 != (p->type & mask) && 0 == match(p->hostmask, name)) {
312 if (crule_eval(p->node))
320 * Remove all conf entries from the client except those which match
321 * the status field mask.
323 void det_confs_butmask(struct Client* cptr, int mask)
329 for (link = cli_confs(cptr); link; link = next) {
331 if ((link->value.aconf->status & mask) == 0)
332 detach_conf(cptr, link->value.aconf);
337 * check_limit_and_attach - check client limits and attach I:line
339 * Made it accept 1 charactor, and 2 charactor limits (0->99 now),
340 * and dislallow more than 255 people here as well as in ipcheck.
341 * removed the old "ONE" scheme too.
342 * -- Isomer 2000-06-22
344 static enum AuthorizationCheckResult
345 check_limit_and_attach(struct Client* cptr, struct ConfItem* aconf)
350 if (IsDigit(*aconf->passwd) && !aconf->passwd[1])
351 number = *aconf->passwd-'0';
352 else if (IsDigit(*aconf->passwd) && IsDigit(aconf->passwd[1]) &&
354 number = (*aconf->passwd-'0')*10+(aconf->passwd[1]-'0');
356 if (IPcheck_nr(cptr) > number)
357 return ACR_TOO_MANY_FROM_IP;
358 return attach_conf(cptr, aconf);
362 * Find the first (best) I line to attach.
364 enum AuthorizationCheckResult attach_iline(struct Client* cptr)
366 struct ConfItem* aconf;
369 static char uhost[HOSTLEN + USERLEN + 3];
370 static char fullname[HOSTLEN + 1];
371 struct hostent* hp = 0;
375 if (cli_dns_reply(cptr))
376 hp = cli_dns_reply(cptr)->hp;
378 for (aconf = GlobalConfList; aconf; aconf = aconf->next) {
379 if (aconf->status != CONF_CLIENT)
381 if (aconf->port && aconf->port != cli_listener(cptr)->port)
383 if (!aconf->host || !aconf->name)
386 for (i = 0, hname = hp->h_name; hname; hname = hp->h_aliases[i++]) {
387 ircd_strncpy(fullname, hname, HOSTLEN);
388 fullname[HOSTLEN] = '\0';
390 Debug((DEBUG_DNS, "a_il: %s->%s", cli_sockhost(cptr), fullname));
392 if (strchr(aconf->name, '@')) {
393 strcpy(uhost, cli_username(cptr));
398 strncat(uhost, fullname, sizeof(uhost) - 1 - strlen(uhost));
399 uhost[sizeof(uhost) - 1] = 0;
400 if (0 == match(aconf->name, uhost)) {
401 if (strchr(uhost, '@'))
402 cli_flags(cptr) |= FLAGS_DOID;
403 return check_limit_and_attach(cptr, aconf);
407 if (strchr(aconf->host, '@')) {
408 ircd_strncpy(uhost, cli_username(cptr), sizeof(uhost) - 2);
409 uhost[sizeof(uhost) - 2] = 0;
414 strncat(uhost, cli_sock_ip(cptr), sizeof(uhost) - 1 - strlen(uhost));
415 uhost[sizeof(uhost) - 1] = 0;
416 if (match(aconf->host, uhost))
418 if (strchr(uhost, '@'))
419 cli_flags(cptr) |= FLAGS_DOID;
421 return check_limit_and_attach(cptr, aconf);
423 return ACR_NO_AUTHORIZATION;
426 static int is_attached(struct ConfItem *aconf, struct Client *cptr)
430 for (lp = cli_confs(cptr); lp; lp = lp->next) {
431 if (lp->value.aconf == aconf)
440 * Associate a specific configuration entry to a *local*
441 * client (this is the one which used in accepting the
442 * connection). Note, that this automaticly changes the
443 * attachment if there was an old one...
445 enum AuthorizationCheckResult attach_conf(struct Client *cptr, struct ConfItem *aconf)
449 if (is_attached(aconf, cptr))
450 return ACR_ALREADY_AUTHORIZED;
451 if (IsIllegal(aconf))
452 return ACR_NO_AUTHORIZATION;
453 if ((aconf->status & (CONF_LOCOP | CONF_OPERATOR | CONF_CLIENT)) &&
454 ConfLinks(aconf) >= ConfMaxLinks(aconf) && ConfMaxLinks(aconf) > 0)
455 return ACR_TOO_MANY_IN_CLASS; /* Use this for printing error message */
457 lp->next = cli_confs(cptr);
458 lp->value.aconf = aconf;
459 cli_confs(cptr) = lp;
461 if (aconf->status & CONF_CLIENT_MASK)
466 const struct LocalConf* conf_get_local(void)
472 * attach_confs_byname
474 * Attach a CONF line to a client if the name passed matches that for
475 * the conf file (for non-C/N lines) or is an exact match (C/N lines
476 * only). The difference in behaviour is to stop C:*::* and N:*::*.
478 struct ConfItem* attach_confs_byname(struct Client* cptr, const char* name,
481 struct ConfItem* tmp;
482 struct ConfItem* first = NULL;
486 if (HOSTLEN < strlen(name))
489 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
490 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
491 assert(0 != tmp->name);
492 if (0 == match(tmp->name, name) || 0 == ircd_strcmp(tmp->name, name)) {
493 if (ACR_OK == attach_conf(cptr, tmp) && !first)
502 * Added for new access check meLazy
504 struct ConfItem* attach_confs_byhost(struct Client* cptr, const char* host,
507 struct ConfItem* tmp;
508 struct ConfItem* first = 0;
511 if (HOSTLEN < strlen(host))
514 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
515 if (0 != (tmp->status & statmask) && !IsIllegal(tmp)) {
516 assert(0 != tmp->host);
517 if (0 == match(tmp->host, host) || 0 == ircd_strcmp(tmp->host, host)) {
518 if (ACR_OK == attach_conf(cptr, tmp) && !first)
527 * find a conf entry which matches the hostname and has the same name.
529 struct ConfItem* find_conf_exact(const char* name, const char* user,
530 const char* host, int statmask)
532 struct ConfItem *tmp;
533 char userhost[USERLEN + HOSTLEN + 3];
536 ircd_snprintf(0, userhost, sizeof(userhost), "%s@%s", user, host);
538 ircd_strncpy(userhost, host, sizeof(userhost) - 1);
540 for (tmp = GlobalConfList; tmp; tmp = tmp->next) {
541 if (!(tmp->status & statmask) || !tmp->name || !tmp->host ||
542 0 != ircd_strcmp(tmp->name, name))
545 * Accept if the *real* hostname (usually sockecthost)
546 * socket host) matches *either* host or name field
547 * of the configuration.
549 if (match(tmp->host, userhost))
551 if (tmp->status & (CONF_OPERATOR | CONF_LOCOP)) {
552 if (tmp->clients < MaxLinks(tmp->conn_class))
563 struct ConfItem* find_conf_byname(struct SLink* lp, const char* name,
566 struct ConfItem* tmp;
569 if (HOSTLEN < strlen(name))
572 for (; lp; lp = lp->next) {
573 tmp = lp->value.aconf;
574 if (0 != (tmp->status & statmask)) {
575 assert(0 != tmp->name);
576 if (0 == ircd_strcmp(tmp->name, name) || 0 == match(tmp->name, name))
584 * Added for new access check meLazy
586 struct ConfItem* find_conf_byhost(struct SLink* lp, const char* host,
589 struct ConfItem* tmp = NULL;
592 if (HOSTLEN < strlen(host))
595 for (; lp; lp = lp->next) {
596 tmp = lp->value.aconf;
597 if (0 != (tmp->status & statmask)) {
598 assert(0 != tmp->host);
599 if (0 == match(tmp->host, host))
609 * Find a conf line using the IP# stored in it to search upon.
610 * Added 1/8/92 by Avalon.
612 struct ConfItem* find_conf_byip(struct SLink* lp, const char* ip,
615 struct ConfItem* tmp;
617 for (; lp; lp = lp->next) {
618 tmp = lp->value.aconf;
619 if (0 != (tmp->status & statmask)) {
620 if (0 == memcmp(&tmp->ipnum, ip, sizeof(struct in_addr)))
630 * - looks for a match on all given fields.
633 static struct ConfItem *find_conf_entry(struct ConfItem *aconf,
636 struct ConfItem *bconf;
639 mask &= ~CONF_ILLEGAL;
641 for (bconf = GlobalConfList; bconf; bconf = bconf->next) {
642 if (!(bconf->status & mask) || (bconf->port != aconf->port))
645 if ((EmptyString(bconf->host) && !EmptyString(aconf->host)) ||
646 (EmptyString(aconf->host) && !EmptyString(bconf->host)))
648 if (!EmptyString(bconf->host) && 0 != ircd_strcmp(bconf->host, aconf->host))
651 if ((EmptyString(bconf->passwd) && !EmptyString(aconf->passwd)) ||
652 (EmptyString(aconf->passwd) && !EmptyString(bconf->passwd)))
654 if (!EmptyString(bconf->passwd) && (!IsDigit(*bconf->passwd) || bconf->passwd[1])
655 && 0 != ircd_strcmp(bconf->passwd, aconf->passwd))
658 if ((EmptyString(bconf->name) && !EmptyString(aconf->name)) ||
659 (EmptyString(aconf->name) && !EmptyString(bconf->name)))
661 if (!EmptyString(bconf->name) && 0 != ircd_strcmp(bconf->name, aconf->name))
669 * If conf line is a class definition, create a class entry
670 * for it and make the conf_line illegal and delete it.
672 void conf_add_class(const char* const* fields, int count)
676 add_class(atoi(fields[1]), atoi(fields[2]), atoi(fields[3]),
677 atoi(fields[4]), atoi(fields[5]));
680 void conf_add_listener(const char* const* fields, int count)
688 if (count < 5 || EmptyString(fields[4]))
691 if (!EmptyString(fields[3])) {
692 const char* x = fields[3];
693 if ('S' == ToUpper(*x))
696 if ('H' == ToUpper(*x))
699 /* port vhost mask */
700 add_listener(atoi(fields[4]), fields[2], fields[1], is_server, is_hidden);
703 void conf_add_local(const char* const* fields, int count)
705 if (count < 6 || EmptyString(fields[1]) || EmptyString(fields[5])) {
706 log_write(LS_CONFIG, L_CRIT, 0, "Your M: line must have 6 fields!");
710 * these two can only be set the first time
712 if (0 == localConf.name) {
713 if (string_is_hostname(fields[1]))
714 DupString(localConf.name, fields[1]);
716 if (0 == localConf.numeric) {
717 localConf.numeric = atoi(fields[5]);
718 if (0 == localConf.numeric)
719 log_write(LS_CONFIG, L_WARNING, 0,
720 "Your M: line must have a Numeric value greater than 0");
723 * these two can be changed while the server is running
725 if (string_is_address(fields[2])) {
726 if (INADDR_NONE == (localConf.vhost_address.s_addr = inet_addr(fields[2])))
727 localConf.vhost_address.s_addr = INADDR_ANY;
729 MyFree(localConf.description);
730 DupString(localConf.description, fields[3]);
732 * XXX - shouldn't be setting these directly here
734 ircd_strncpy(cli_info(&me), fields[3], REALLEN);
735 set_virtual_host(localConf.vhost_address);
738 void conf_add_admin(const char* const* fields, int count)
741 * if you have one, it MUST have 3 lines
744 log_write(LS_CONFIG, L_CRIT, 0, "Your A: line must have 4 fields!");
747 MyFree(localConf.location1);
748 DupString(localConf.location1, fields[1]);
750 MyFree(localConf.location2);
751 DupString(localConf.location2, fields[2]);
753 MyFree(localConf.contact);
754 DupString(localConf.contact, fields[3]);
758 * conf_add_crule - Create expression tree from connect rule and add it
761 void conf_add_crule(const char* const* fields, int count, int type)
763 struct CRuleNode* node;
766 if (count < 4 || EmptyString(fields[1]) || EmptyString(fields[3]))
769 if ((node = crule_parse(fields[3]))) {
770 struct CRuleConf* p = (struct CRuleConf*) MyMalloc(sizeof(struct CRuleConf));
773 DupString(p->hostmask, fields[1]);
774 collapse(p->hostmask);
776 DupString(p->rule, fields[3]);
780 p->next = cruleConfList;
786 void conf_erase_crule_list(void)
788 struct CRuleConf* next;
789 struct CRuleConf* p = cruleConfList;
791 for ( ; p; p = next) {
793 crule_free(&p->node);
801 const struct CRuleConf* conf_get_crule_list(void)
803 return cruleConfList;
807 void conf_add_server(const char* const* fields, int count)
809 struct ServerConf* server;
813 * missing host, password, or alias?
815 if (count < 6 || EmptyString(fields[1]) || EmptyString(fields[2]) || EmptyString(fields[3]))
820 if (string_is_hostname(fields[1]))
821 addr.s_addr = INADDR_NONE;
822 else if (INADDR_NONE == (addr.s_addr = inet_addr(fields[1])))
825 server = (struct ServerConf*) MyMalloc(sizeof(struct ServerConf));
827 DupString(server->hostname, fields[1]);
828 DupString(server->passwd, fields[2]);
829 DupString(server->alias, fields[3]);
830 server->address.s_addr = addr.s_addr;
831 server->port = atoi(fields[4]);
832 server->dns_pending = 0;
833 server->connected = 0;
835 server->conn_class = find_class(atoi(fields[5]));
837 server->next = serverConfList;
838 serverConfList = server;
840 /* if (INADDR_NONE == server->address.s_addr) */
841 /* lookup_confhost(server); */
844 void conf_add_deny(const char* const* fields, int count, int ip_kill)
846 struct DenyConf* conf;
848 if (count < 4 || EmptyString(fields[1]) || EmptyString(fields[3]))
851 conf = (struct DenyConf*) MyMalloc(sizeof(struct DenyConf));
853 memset(conf, 0, sizeof(struct DenyConf));
855 if (fields[1][0] == '$' && fields[1][1] == 'R')
856 conf->flags |= DENY_FLAGS_REALNAME;
858 DupString(conf->hostmask, fields[1]);
859 collapse(conf->hostmask);
861 if (!EmptyString(fields[2])) {
862 const char* p = fields[2];
864 conf->flags |= DENY_FLAGS_FILE;
867 DupString(conf->message, p);
869 DupString(conf->usermask, fields[3]);
870 collapse(conf->usermask);
874 * Here we use the same kludge as in listener.c to parse
875 * a.b.c.d, or a.b.c.*, or a.b.c.d/e.
881 c_class = sscanf(conf->hostmask, "%d.%d.%d.%d/%d",
882 &ad[0], &ad[1], &ad[2], &ad[3], &bits2);
884 conf->bits = c_class * 8;
889 ircd_snprintf(0, ipname, sizeof(ipname), "%d.%d.%d.%d", ad[0], ad[1],
893 * This ensures endian correctness
895 conf->address = inet_addr(ipname);
896 Debug((DEBUG_DEBUG, "IPkill: %s = %08x/%i (%08x)", ipname,
897 conf->address, conf->bits, NETMASK(conf->bits)));
898 conf->flags |= DENY_FLAGS_IP;
900 conf->next = denyConfList;
906 void conf_erase_deny_list(void)
908 struct DenyConf* next;
909 struct DenyConf* p = denyConfList;
910 for ( ; p; p = next) {
920 const struct DenyConf* conf_get_deny_list(void)
926 * read_configuration_file
928 * Read configuration file.
930 * returns 0, if file cannot be opened
934 #define MAXCONFLINKS 150
937 void init_lexer(void);
939 int read_configuration_file(void)
941 feature_unmark(); /* unmark all features for resetting later */
942 /* Now just open an fd. The buffering isn't really needed... */
947 feature_mark(); /* reset unmarked features */
952 yyerror(const char *msg)
954 sendto_opmask_butone(0, SNO_ALL, "Config file parse error line %d: %s",
956 log_write(LS_CONFIG, L_ERROR, 0, "Config file parse error line %d: %s",
963 * Actual REHASH service routine. Called with sig == 0 if it has been called
964 * as a result of an operator issuing this command, else assume it has been
965 * called as a result of the server receiving a HUP signal.
967 int rehash(struct Client *cptr, int sig)
969 struct ConfItem** tmp = &GlobalConfList;
970 struct ConfItem* tmp2;
971 struct Client* acptr;
977 sendto_opmask_butone(0, SNO_OLDSNO,
978 "Got signal SIGHUP, reloading ircd conf. file");
980 while ((tmp2 = *tmp)) {
983 * Configuration entry is still in use by some
984 * local clients, cannot delete it--mark it so
985 * that it will be deleted when the last client
988 if (CONF_CLIENT == (tmp2->status & CONF_CLIENT))
994 tmp2->status |= CONF_ILLEGAL;
1001 conf_erase_crule_list();
1002 conf_erase_deny_list();
1006 * delete the juped nicks list
1011 flush_resolver_cache();
1013 class_mark_delete();
1014 mark_listeners_closing();
1016 read_configuration_file();
1018 log_reopen(); /* reopen log files */
1021 class_delete_marked(); /* unless it fails */
1024 * Flush out deleted I and P lines although still in use.
1026 for (tmp = &GlobalConfList; (tmp2 = *tmp);) {
1027 if (CONF_ILLEGAL == (tmp2->status & CONF_ILLEGAL)) {
1037 for (i = 0; i <= HighestFd; i++) {
1038 if ((acptr = LocalClientArray[i])) {
1039 assert(!IsMe(acptr));
1040 if (IsServer(acptr)) {
1041 det_confs_butmask(acptr,
1042 ~(CONF_HUB | CONF_LEAF | CONF_UWORLD | CONF_ILLEGAL));
1043 attach_confs_byname(acptr, cli_name(acptr),
1044 CONF_HUB | CONF_LEAF | CONF_UWORLD);
1046 /* Because admin's are getting so uppity about people managing to
1047 * get past K/G's etc, we'll "fix" the bug by actually explaining
1050 if ((found_g = find_kill(acptr))) {
1051 sendto_opmask_butone(0, found_g == -2 ? SNO_GLINE : SNO_OPERKILL,
1052 found_g == -2 ? "G-line active for %s%s" :
1053 "K-line active for %s%s",
1054 IsUnknown(acptr) ? "Unregistered Client ":"",
1055 get_client_name(acptr, HIDE_IP));
1056 if (exit_client(cptr, acptr, &me, found_g == -2 ? "G-lined" :
1057 "K-lined") == CPTR_KILLED)
1069 * Read configuration file.
1071 * returns 0, if file cannot be opened
1077 if (read_configuration_file()) {
1079 * make sure we're sane to start if the config
1080 * file read didn't get everything we need.
1081 * XXX - should any of these abort the server?
1082 * TODO: add warning messages
1084 if (0 == localConf.name || 0 == localConf.numeric)
1087 if (0 == localConf.location1)
1088 DupString(localConf.location1, "");
1089 if (0 == localConf.location2)
1090 DupString(localConf.location2, "");
1091 if (0 == localConf.contact)
1092 DupString(localConf.contact, "");
1104 * 0: Client may continue to try and connect
1105 * -1: Client was K/k:'d - sideeffect: reason was sent.
1106 * -2: Client was G/g:'d - sideeffect: reason was sent.
1108 * Client may have been sent a reason why they are denied, as above.
1110 int find_kill(struct Client *cptr)
1114 const char* realname;
1115 struct DenyConf* deny;
1116 struct Gline* agline = NULL;
1120 if (!cli_user(cptr))
1123 host = cli_sockhost(cptr);
1124 name = cli_user(cptr)->username;
1125 realname = cli_info(cptr);
1127 assert(strlen(host) <= HOSTLEN);
1128 assert((name ? strlen(name) : 0) <= HOSTLEN);
1129 assert((realname ? strlen(realname) : 0) <= REALLEN);
1131 /* 2000-07-14: Rewrote this loop for massive speed increases.
1134 for (deny = denyConfList; deny; deny = deny->next) {
1135 if (0 != match(deny->usermask, name))
1138 if (EmptyString(deny->hostmask))
1141 if (deny->flags & DENY_FLAGS_REALNAME) { /* K: by real name */
1142 if (0 == match(deny->hostmask, realname))
1144 } else if (deny->flags & DENY_FLAGS_IP) { /* k: by IP */
1145 Debug((DEBUG_DEBUG, "ip: %08x network: %08x/%i mask: %08x",
1146 cli_ip(cptr).s_addr, deny->address, deny->bits, NETMASK(deny->bits)));
1147 if ((cli_ip(cptr).s_addr & NETMASK(deny->bits)) == deny->address)
1150 else if (0 == match(deny->hostmask, host))
1154 if (EmptyString(deny->message))
1155 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP,
1156 ":Connection from your host is refused on this server.");
1158 if (deny->flags & DENY_FLAGS_FILE)
1159 killcomment(cptr, deny->message);
1161 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", deny->message);
1164 else if ((agline = gline_lookup(cptr, 0)) && GlineIsActive(agline)) {
1166 * find active glines
1167 * added a check against the user's IP address to find_gline() -Kev
1169 send_reply(cptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s.", GlineReason(agline));
1172 agline = 0; /* if a gline was found, it was inactive */
1183 * Ordinary client access check. Look for conf lines which have the same
1184 * status as the flags passed.
1186 enum AuthorizationCheckResult conf_check_client(struct Client *cptr)
1188 enum AuthorizationCheckResult acr = ACR_OK;
1192 if ((acr = attach_iline(cptr))) {
1193 Debug((DEBUG_DNS, "ch_cl: access denied: %s[%s]",
1194 cli_name(cptr), cli_sockhost(cptr)));
1203 * Check access for a server given its name (passed in cptr struct).
1204 * Must check for all C/N lines which have a name which matches the
1205 * name given and a host which matches. A host alias which is the
1206 * same as the server name is also acceptable in the host field of a
1211 * -1 = Access denied
1214 int conf_check_server(struct Client *cptr)
1216 struct ConfItem* c_conf = NULL;
1219 Debug((DEBUG_DNS, "sv_cl: check access for %s[%s]",
1220 cli_name(cptr), cli_sockhost(cptr)));
1222 if (IsUnknown(cptr) && !attach_confs_byname(cptr, cli_name(cptr), CONF_SERVER)) {
1223 Debug((DEBUG_DNS, "No C/N lines for %s", cli_sockhost(cptr)));
1226 lp = cli_confs(cptr);
1228 * We initiated this connection so the client should have a C and N
1229 * line already attached after passing through the connect_server()
1232 if (IsConnecting(cptr) || IsHandshake(cptr)) {
1233 c_conf = find_conf_byname(lp, cli_name(cptr), CONF_SERVER);
1235 sendto_opmask_butone(0, SNO_OLDSNO, "Connect Error: lost C:line for %s",
1237 det_confs_butmask(cptr, 0);
1245 if (cli_dns_reply(cptr)) {
1247 struct hostent* hp = cli_dns_reply(cptr)->hp;
1248 const char* name = hp->h_name;
1250 * If we are missing a C or N line from above, search for
1251 * it under all known hostnames we have for this ip#.
1253 for (i = 0; name; name = hp->h_aliases[i++]) {
1254 if ((c_conf = find_conf_byhost(lp, name, CONF_SERVER))) {
1255 ircd_strncpy(cli_sockhost(cptr), name, HOSTLEN);
1260 for (i = 0; hp->h_addr_list[i]; i++) {
1261 if ((c_conf = find_conf_byip(lp, hp->h_addr_list[i], CONF_SERVER)))
1268 * Check for C lines with the hostname portion the ip number
1269 * of the host the server runs on. This also checks the case where
1270 * there is a server connecting from 'localhost'.
1272 c_conf = find_conf_byhost(lp, cli_sockhost(cptr), CONF_SERVER);
1276 * Attach by IP# only if all other checks have failed.
1277 * It is quite possible to get here with the strange things that can
1278 * happen when using DNS in the way the irc server does. -avalon
1281 c_conf = find_conf_byip(lp, (const char*) &(cli_ip(cptr)), CONF_SERVER);
1283 * detach all conf lines that got attached by attach_confs()
1285 det_confs_butmask(cptr, 0);
1287 * if no C or no N lines, then deny access
1290 Debug((DEBUG_DNS, "sv_cl: access denied: %s[%s@%s]",
1291 cli_name(cptr), cli_username(cptr), cli_sockhost(cptr)));
1294 ircd_strncpy(cli_name(cptr), c_conf->name, HOSTLEN);
1296 * attach the C and N lines to the client structure for later use.
1298 attach_conf(cptr, c_conf);
1299 attach_confs_byname(cptr, cli_name(cptr), CONF_HUB | CONF_LEAF | CONF_UWORLD);
1301 if (INADDR_NONE == c_conf->ipnum.s_addr)
1302 c_conf->ipnum.s_addr = cli_ip(cptr).s_addr;
1304 Debug((DEBUG_DNS, "sv_cl: access ok: %s[%s]", cli_name(cptr), cli_sockhost(cptr)));