/* * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) * * Copyright (c) 1997-2014 ircd-hybrid development team * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ /*! \file client.c * \brief Controls clients. * \version $Id$ */ #include "stdinc.h" #include "list.h" #include "client.h" #include "channel_mode.h" #include "event.h" #include "fdlist.h" #include "hash.h" #include "irc_string.h" #include "ircd.h" #include "s_gline.h" #include "numeric.h" #include "packet.h" #include "s_auth.h" #include "s_bsd.h" #include "conf.h" #include "log.h" #include "s_misc.h" #include "s_serv.h" #include "send.h" #include "whowas.h" #include "s_user.h" #include "dbuf.h" #include "memory.h" #include "mempool.h" #include "hostmask.h" #include "listener.h" #include "irc_res.h" #include "userhost.h" #include "watch.h" #include "rng_mt.h" #include "parse.h" dlink_list listing_client_list = { NULL, NULL, 0 }; /* Pointer to beginning of Client list */ dlink_list global_client_list = {NULL, NULL, 0}; /* unknown/client pointer lists */ dlink_list unknown_list = {NULL, NULL, 0}; dlink_list local_client_list = {NULL, NULL, 0}; dlink_list serv_list = {NULL, NULL, 0}; dlink_list global_serv_list = {NULL, NULL, 0}; dlink_list oper_list = {NULL, NULL, 0}; static EVH check_pings; static mp_pool_t *client_pool = NULL; static mp_pool_t *lclient_pool = NULL; static dlink_list dead_list = { NULL, NULL, 0}; static dlink_list abort_list = { NULL, NULL, 0}; static dlink_node *eac_next; /* next aborted client to exit */ static void check_pings_list(dlink_list *); static void check_unknowns_list(void); /* client_init() * * inputs - NONE * output - NONE * side effects - initialize client free memory */ void client_init(void) { /* start off the check ping event .. -- adrian * Every 30 seconds is plenty -- db */ client_pool = mp_pool_new(sizeof(struct Client), MP_CHUNK_SIZE_CLIENT); lclient_pool = mp_pool_new(sizeof(struct LocalUser), MP_CHUNK_SIZE_LCLIENT); eventAdd("check_pings", check_pings, NULL, 5); } /* * make_client - create a new Client struct and set it to initial state. * * from == NULL, create local client (a client connected * to a socket). * WARNING: This leaves the client in a dangerous * state where fd == -1, dead flag is not set and * the client is on the unknown_list; therefore, * the first thing to do after calling make_client(NULL) * is setting fd to something reasonable. -adx * * from, create remote client (behind a socket * associated with the client defined by * 'from'). ('from' is a local client!!). */ struct Client * make_client(struct Client *from) { struct Client *client_p = mp_pool_get(client_pool); memset(client_p, 0, sizeof(*client_p)); if (from == NULL) { client_p->from = client_p; /* 'from' of local client is self! */ client_p->localClient = mp_pool_get(lclient_pool); memset(client_p->localClient, 0, sizeof(*client_p->localClient)); client_p->localClient->since = CurrentTime; client_p->localClient->lasttime = CurrentTime; client_p->localClient->firsttime = CurrentTime; client_p->localClient->registration = REG_INIT; /* as good a place as any... */ dlinkAdd(client_p, &client_p->localClient->lclient_node, &unknown_list); } else client_p->from = from; /* 'from' of local client is self! */ client_p->idhnext = client_p; client_p->hnext = client_p; SetUnknown(client_p); strcpy(client_p->username, "unknown"); strcpy(client_p->svid, "0"); return client_p; } /* * free_client * * inputs - pointer to client * output - NONE * side effects - client pointed to has its memory freed */ static void free_client(struct Client *client_p) { assert(client_p != NULL); assert(client_p != &me); assert(client_p->hnext == client_p); assert(client_p->idhnext == client_p); assert(client_p->channel.head == NULL); assert(dlink_list_length(&client_p->channel) == 0); assert(dlink_list_length(&client_p->whowas) == 0); assert(!IsServer(client_p) || (IsServer(client_p) && client_p->serv)); MyFree(client_p->serv); MyFree(client_p->certfp); if (MyConnect(client_p)) { assert(client_p->localClient->invited.head == NULL); assert(dlink_list_length(&client_p->localClient->invited) == 0); assert(dlink_list_length(&client_p->localClient->watches) == 0); assert(IsClosing(client_p) && IsDead(client_p)); MyFree(client_p->localClient->response); MyFree(client_p->localClient->auth_oper); /* * clean up extra sockets from P-lines which have been discarded. */ if (client_p->localClient->listener) { assert(0 < client_p->localClient->listener->ref_count); if (0 == --client_p->localClient->listener->ref_count && !client_p->localClient->listener->active) free_listener(client_p->localClient->listener); } dbuf_clear(&client_p->localClient->buf_recvq); dbuf_clear(&client_p->localClient->buf_sendq); mp_pool_release(client_p->localClient); } mp_pool_release(client_p); } /* * check_pings - go through the local client list and check activity * kill off stuff that should die * * inputs - NOT USED (from event) * output - next time_t when check_pings() should be called again * side effects - * * * A PING can be sent to clients as necessary. * * Client/Server ping outs are handled. */ /* * Addon from adrian. We used to call this after nextping seconds, * however I've changed it to run once a second. This is only for * PING timeouts, not K/etc-line checks (thanks dianora!). Having it * run once a second makes life a lot easier - when a new client connects * and they need a ping in 4 seconds, if nextping was set to 20 seconds * we end up waiting 20 seconds. This is stupid. :-) * I will optimise (hah!) check_pings() once I've finished working on * tidying up other network IO evilnesses. * -- adrian */ static void check_pings(void *notused) { check_pings_list(&local_client_list); check_pings_list(&serv_list); check_unknowns_list(); } /* check_pings_list() * * inputs - pointer to list to check * output - NONE * side effects - */ static void check_pings_list(dlink_list *list) { char scratch[IRCD_BUFSIZE]; int ping = 0; /* ping time value from client */ dlink_node *ptr = NULL, *next_ptr = NULL; DLINK_FOREACH_SAFE(ptr, next_ptr, list->head) { struct Client *client_p = ptr->data; /* ** Note: No need to notify opers here. It's ** already done when "FLAGS_DEADSOCKET" is set. */ if (IsDead(client_p)) { /* Ignore it, its been exited already */ continue; } if (!IsRegistered(client_p)) ping = CONNECTTIMEOUT; else ping = get_client_ping(&client_p->localClient->confs); if (ping < CurrentTime - client_p->localClient->lasttime) { if (!IsPingSent(client_p)) { /* * if we havent PINGed the connection and we havent * heard from it in a while, PING it to make sure * it is still alive. */ SetPingSent(client_p); client_p->localClient->lasttime = CurrentTime - ping; sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p)); } else { if (CurrentTime - client_p->localClient->lasttime >= 2 * ping) { /* * If the client/server hasn't talked to us in 2*ping seconds * and it has a ping time, then close its connection. */ if (IsServer(client_p) || IsHandshake(client_p)) { sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE, "No response from %s, closing link", get_client_name(client_p, HIDE_IP)); sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE, "No response from %s, closing link", get_client_name(client_p, MASK_IP)); ilog(LOG_TYPE_IRCD, "No response from %s, closing link", get_client_name(client_p, HIDE_IP)); } snprintf(scratch, sizeof(scratch), "Ping timeout: %d seconds", (int)(CurrentTime - client_p->localClient->lasttime)); exit_client(client_p, &me, scratch); } } } } } /* check_unknowns_list() * * inputs - pointer to list of unknown clients * output - NONE * side effects - unknown clients get marked for termination after n seconds */ static void check_unknowns_list(void) { dlink_node *ptr, *next_ptr; DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head) { struct Client *client_p = ptr->data; /* * Check UNKNOWN connections - if they have been in this state * for > 30s, close them. */ if (IsAuthFinished(client_p) && (CurrentTime - client_p->localClient->firsttime) > 30) exit_client(client_p, &me, "Registration timed out"); } } /* check_conf_klines() * * inputs - NONE * output - NONE * side effects - Check all connections for a pending kline against the * client, exit the client if a kline matches. */ void check_conf_klines(void) { struct Client *client_p = NULL; /* current local client_p being examined */ struct MaskItem *conf = NULL; dlink_node *ptr, *next_ptr; DLINK_FOREACH_SAFE(ptr, next_ptr, local_client_list.head) { client_p = ptr->data; /* If a client is already being exited */ if (IsDead(client_p) || !IsClient(client_p)) continue; if ((conf = find_dline_conf(&client_p->localClient->ip, client_p->localClient->aftype)) != NULL) { if (conf->type == CONF_EXEMPT) continue; conf_try_ban(client_p, conf); continue; /* and go examine next fd/client_p */ } if (ConfigFileEntry.glines) { if ((conf = find_conf_by_address(client_p->host, &client_p->localClient->ip, CONF_GLINE, client_p->localClient->aftype, client_p->username, NULL, 1))) { conf_try_ban(client_p, conf); /* and go examine next fd/client_p */ continue; } } if ((conf = find_conf_by_address(client_p->host, &client_p->localClient->ip, CONF_KLINE, client_p->localClient->aftype, client_p->username, NULL, 1))) { conf_try_ban(client_p, conf); continue; } if ((conf = find_matching_name_conf(CONF_XLINE, client_p->info, NULL, NULL, 0))) { conf_try_ban(client_p, conf); continue; } } /* also check the unknowns list for new dlines */ DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head) { client_p = ptr->data; if ((conf = find_dline_conf(&client_p->localClient->ip, client_p->localClient->aftype))) { if (conf->type == CONF_EXEMPT) continue; exit_client(client_p, &me, "D-lined"); } } } /* * conf_try_ban * * inputs - pointer to client to ban * - pointer to MaskItem * output - NONE * side effects - given client_p is banned */ void conf_try_ban(struct Client *client_p, struct MaskItem *conf) { const char *user_reason = NULL; /* What is sent to user */ const char *type_string = NULL; const char dline_string[] = "D-line"; const char kline_string[] = "K-line"; const char gline_string[] = "G-line"; const char xline_string[] = "X-line"; switch (conf->type) { case CONF_KLINE: if (IsExemptKline(client_p)) { sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "KLINE over-ruled for %s, client is kline_exempt", get_client_name(client_p, HIDE_IP)); return; } type_string = kline_string; break; case CONF_DLINE: type_string = dline_string; break; case CONF_GLINE: if (IsExemptKline(client_p) || IsExemptGline(client_p)) { sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "GLINE over-ruled for %s, client is %sline_exempt", get_client_name(client_p, HIDE_IP), IsExemptKline(client_p) ? "k" : "g"); return; } type_string = gline_string; break; case CONF_XLINE: type_string = xline_string; ++conf->count; break; default: assert(0); break; } user_reason = conf->reason ? conf->reason : type_string; sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s active for %s", type_string, get_client_name(client_p, HIDE_IP)); if (IsClient(client_p)) sendto_one(client_p, form_str(ERR_YOUREBANNEDCREEP), me.name, client_p->name, user_reason); exit_client(client_p, &me, user_reason); } /* update_client_exit_stats() * * input - pointer to client * output - NONE * side effects - */ static void update_client_exit_stats(struct Client *client_p) { if (IsClient(client_p)) { assert(Count.total > 0); --Count.total; if (HasUMode(client_p, UMODE_OPER)) --Count.oper; if (HasUMode(client_p, UMODE_INVISIBLE)) --Count.invisi; } else if (IsServer(client_p)) sendto_realops_flags(UMODE_EXTERNAL, L_ALL, SEND_NOTICE, "Server %s split from %s", client_p->name, client_p->servptr->name); if (splitchecking && !splitmode) check_splitmode(NULL); } /* find_person() * * inputs - pointer to name * output - return client pointer * side effects - find person by (nick)name */ struct Client * find_person(const struct Client *const client_p, const char *name) { struct Client *target_p = NULL; if (IsDigit(*name)) { if (IsServer(client_p) || HasFlag(client_p, FLAGS_SERVICE)) target_p = hash_find_id(name); } else target_p = hash_find_client(name); return (target_p && IsClient(target_p)) ? target_p : NULL; } /* * find_chasing - find the client structure for a nick name (name) * using history mechanism if necessary. If the client is not found, * an error message (NO SUCH NICK) is generated. */ struct Client * find_chasing(struct Client *source_p, const char *name) { struct Client *who = find_person(source_p->from, name); if (who) return who; if (IsDigit(*name)) return NULL; if ((who = whowas_get_history(name, (time_t)ConfigFileEntry.kill_chase_time_limit)) == NULL) { sendto_one(source_p, form_str(ERR_NOSUCHNICK), me.name, source_p->name, name); return NULL; } return who; } /* * get_client_name - Return the name of the client * for various tracking and * admin purposes. The main purpose of this function is to * return the "socket host" name of the client, if that * differs from the advertised name (other than case). * But, this can be used to any client structure. * * NOTE 1: * Watch out the allocation of "nbuf", if either source_p->name * or source_p->sockhost gets changed into pointers instead of * directly allocated within the structure... * * NOTE 2: * Function return either a pointer to the structure (source_p) or * to internal buffer (nbuf). *NEVER* use the returned pointer * to modify what it points!!! */ const char * get_client_name(const struct Client *client, enum addr_mask_type type) { static char nbuf[HOSTLEN * 2 + USERLEN + 5]; assert(client != NULL); if (!MyConnect(client)) return client->name; if (IsServer(client) || IsConnecting(client) || IsHandshake(client)) { if (!irccmp(client->name, client->host)) return client->name; else if (ConfigServerHide.hide_server_ips) type = MASK_IP; } if (ConfigFileEntry.hide_spoof_ips) if (type == SHOW_IP && IsIPSpoof(client)) type = MASK_IP; /* And finally, let's get the host information, ip or name */ switch (type) { case SHOW_IP: snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]", client->name, client->username, client->sockhost); break; case MASK_IP: if (client->localClient->aftype == AF_INET) snprintf(nbuf, sizeof(nbuf), "%s[%s@255.255.255.255]", client->name, client->username); else snprintf(nbuf, sizeof(nbuf), "%s[%s@ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]", client->name, client->username); break; default: snprintf(nbuf, sizeof(nbuf), "%s[%s@%s]", client->name, client->username, client->host); } return nbuf; } void free_exited_clients(void) { dlink_node *ptr = NULL, *next = NULL; DLINK_FOREACH_SAFE(ptr, next, dead_list.head) { free_client(ptr->data); dlinkDelete(ptr, &dead_list); free_dlink_node(ptr); } } /* * Exit one client, local or remote. Assuming all dependents have * been already removed, and socket closed for local client. * * The only messages generated are QUITs on channels. */ static void exit_one_client(struct Client *source_p, const char *quitmsg) { dlink_node *lp = NULL, *next_lp = NULL; assert(!IsMe(source_p)); if (IsClient(source_p)) { if (source_p->servptr->serv != NULL) dlinkDelete(&source_p->lnode, &source_p->servptr->serv->client_list); /* * If a person is on a channel, send a QUIT notice * to every client (person) on the same channel (so * that the client can show the "**signoff" message). * (Note: The notice is to the local clients *only*) */ sendto_common_channels_local(source_p, 0, 0, ":%s!%s@%s QUIT :%s", source_p->name, source_p->username, source_p->host, quitmsg); DLINK_FOREACH_SAFE(lp, next_lp, source_p->channel.head) remove_user_from_channel(lp->data); whowas_add_history(source_p, 0); whowas_off_history(source_p); watch_check_hash(source_p, RPL_LOGOFF); if (MyConnect(source_p)) { /* Clean up invitefield */ DLINK_FOREACH_SAFE(lp, next_lp, source_p->localClient->invited.head) del_invite(lp->data, source_p); del_all_accepts(source_p); } } else if (IsServer(source_p)) { dlinkDelete(&source_p->lnode, &source_p->servptr->serv->server_list); if ((lp = dlinkFindDelete(&global_serv_list, source_p)) != NULL) free_dlink_node(lp); } /* Remove source_p from the client lists */ if (HasID(source_p)) hash_del_id(source_p); if (source_p->name[0]) hash_del_client(source_p); if (IsUserHostIp(source_p)) delete_user_host(source_p->username, source_p->host, !MyConnect(source_p)); /* remove from global client list * NOTE: source_p->node.next cannot be NULL if the client is added * to global_client_list (there is always &me at its end) */ if (source_p != NULL && source_p->node.next != NULL) dlinkDelete(&source_p->node, &global_client_list); update_client_exit_stats(source_p); /* Check to see if the client isn't already on the dead list */ assert(dlinkFind(&dead_list, source_p) == NULL); /* add to dead client dlist */ SetDead(source_p); dlinkAdd(source_p, make_dlink_node(), &dead_list); } /* Recursively send QUITs and SQUITs for source_p and all its dependent clients * and servers to those servers that need them. A server needs the client * QUITs if it can't figure them out from the SQUIT (ie pre-TS4) or if it * isn't getting the SQUIT because of @#(*&@)# hostmasking. With TS4, once * a link gets a SQUIT, it doesn't need any QUIT/SQUITs for clients depending * on that one -orabidoo * * This is now called on each local server -adx */ static void recurse_send_quits(struct Client *original_source_p, struct Client *source_p, struct Client *from, struct Client *to, const char *comment, const char *splitstr) { dlink_node *ptr, *next; struct Client *target_p; assert(to != source_p); /* should be already removed from serv_list */ /* If this server can handle quit storm (QS) removal * of dependents, just send the SQUIT */ if (!IsCapable(to, CAP_QS)) DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head) { target_p = ptr->data; sendto_one(to, ":%s QUIT :%s", target_p->name, splitstr); } DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head) recurse_send_quits(original_source_p, ptr->data, from, to, comment, splitstr); if ((source_p == original_source_p && to != from) || !IsCapable(to, CAP_QS)) { /* don't use a prefix here - we have to be 100% sure the message * will be accepted without Unknown prefix etc.. */ sendto_one(to, "SQUIT %s :%s", ID_or_name(source_p, to), comment); } } /* * Remove all clients that depend on source_p; assumes all (S)QUITs have * already been sent. we make sure to exit a server's dependent clients * and servers before the server itself; exit_one_client takes care of * actually removing things off llists. tweaked from +CSr31 -orabidoo */ static void recurse_remove_clients(struct Client *source_p, const char *quitmsg) { dlink_node *ptr, *next; DLINK_FOREACH_SAFE(ptr, next, source_p->serv->client_list.head) exit_one_client(ptr->data, quitmsg); DLINK_FOREACH_SAFE(ptr, next, source_p->serv->server_list.head) { recurse_remove_clients(ptr->data, quitmsg); exit_one_client(ptr->data, quitmsg); } } /* ** Remove *everything* that depends on source_p, from all lists, and sending ** all necessary QUITs and SQUITs. source_p itself is still on the lists, ** and its SQUITs have been sent except for the upstream one -orabidoo */ static void remove_dependents(struct Client *source_p, struct Client *from, const char *comment, const char *splitstr) { dlink_node *ptr = NULL; DLINK_FOREACH(ptr, serv_list.head) recurse_send_quits(source_p, source_p, from, ptr->data, comment, splitstr); recurse_remove_clients(source_p, splitstr); } /* * exit_client - exit a client of any type. Generally, you can use * this on any struct Client, regardless of its state. * * Note, you shouldn't exit remote _users_ without first doing * AddFlag(x, FLAGS_KILLED) and propagating a kill or similar message. * However, it is perfectly correct to call exit_client to force a _server_ * quit (either local or remote one). * * inputs: - a client pointer that is going to be exited * - for servers, the second argument is a pointer to who * is firing the server. This side won't get any generated * messages. NEVER NULL! * output: none * side effects: the client is delinked from all lists, disconnected, * and the rest of IRC network is notified of the exit. * Client memory is scheduled to be freed */ void exit_client(struct Client *source_p, struct Client *from, const char *comment) { dlink_node *m = NULL; if (MyConnect(source_p)) { /* DO NOT REMOVE. exit_client can be called twice after a failed * read/write. */ if (IsClosing(source_p)) return; SetClosing(source_p); if (IsIpHash(source_p)) remove_one_ip(&source_p->localClient->ip); delete_auth(&source_p->localClient->auth); /* * This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING * STAT_HANDSHAKE or STAT_UNKNOWN * all of which are lumped together into unknown_list * * In all above cases IsRegistered() will not be true. */ if (!IsRegistered(source_p)) { assert(dlinkFind(&unknown_list, source_p)); dlinkDelete(&source_p->localClient->lclient_node, &unknown_list); } else if (IsClient(source_p)) { time_t on_for = CurrentTime - source_p->localClient->firsttime; assert(Count.local > 0); Count.local--; if (HasUMode(source_p, UMODE_OPER)) if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL) free_dlink_node(m); assert(dlinkFind(&local_client_list, source_p)); dlinkDelete(&source_p->localClient->lclient_node, &local_client_list); if (source_p->localClient->list_task != NULL) free_list_task(source_p->localClient->list_task, source_p); watch_del_watch_list(source_p); sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE, "Client exiting: %s (%s@%s) [%s] [%s]", source_p->name, source_p->username, source_p->host, comment, ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ? "255.255.255.255" : source_p->sockhost); ilog(LOG_TYPE_USER, "%s (%3u:%02u:%02u): %s!%s@%s %llu/%llu", myctime(source_p->localClient->firsttime), (unsigned int)(on_for / 3600), (unsigned int)((on_for % 3600)/60), (unsigned int)(on_for % 60), source_p->name, source_p->username, source_p->host, source_p->localClient->send.bytes>>10, source_p->localClient->recv.bytes>>10); } else if (IsServer(source_p)) { assert(Count.myserver > 0); --Count.myserver; assert(dlinkFind(&serv_list, source_p)); dlinkDelete(&source_p->localClient->lclient_node, &serv_list); unset_chcap_usage_counts(source_p); } if (!IsDead(source_p)) { if (IsServer(source_p)) { /* for them, we are exiting the network */ sendto_one(source_p, ":%s SQUIT %s :%s", ID_or_name(from, source_p), me.name, comment); } sendto_one(source_p, "ERROR :Closing Link: %s (%s)", source_p->host, comment); } /* ** Currently only server connections can have ** depending remote clients here, but it does no ** harm to check for all local clients. In ** future some other clients than servers might ** have remotes too... ** ** Close the Client connection first and mark it ** so that no messages are attempted to send to it. ** Remember it makes source_p->from == NULL. */ close_connection(source_p); } else if (IsClient(source_p) && HasFlag(source_p->servptr, FLAGS_EOB)) sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE, "Client exiting at %s: %s (%s@%s) [%s]", source_p->servptr->name, source_p->name, source_p->username, source_p->host, comment); if (IsServer(source_p)) { char splitstr[HOSTLEN + HOSTLEN + 2]; /* This shouldn't ever happen */ assert(source_p->serv != NULL && source_p->servptr != NULL); if (ConfigServerHide.hide_servers) /* * Set netsplit message to "*.net *.split" to still show * that its a split, but hide the servers splitting */ strcpy(splitstr, "*.net *.split"); else snprintf(splitstr, sizeof(splitstr), "%s %s", source_p->servptr->name, source_p->name); remove_dependents(source_p, from->from, comment, splitstr); if (source_p->servptr == &me) { sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s was connected for %d seconds. %llu/%llu sendK/recvK.", source_p->name, (int)(CurrentTime - source_p->localClient->firsttime), source_p->localClient->send.bytes >> 10, source_p->localClient->recv.bytes >> 10); ilog(LOG_TYPE_IRCD, "%s was connected for %d seconds. %llu/%llu sendK/recvK.", source_p->name, (int)(CurrentTime - source_p->localClient->firsttime), source_p->localClient->send.bytes >> 10, source_p->localClient->recv.bytes >> 10); } } else if (IsClient(source_p) && !HasFlag(source_p, FLAGS_KILLED)) { sendto_server(from->from, CAP_TS6, NOCAPS, ":%s QUIT :%s", ID(source_p), comment); sendto_server(from->from, NOCAPS, CAP_TS6, ":%s QUIT :%s", source_p->name, comment); } /* The client *better* be off all of the lists */ assert(dlinkFind(&unknown_list, source_p) == NULL); assert(dlinkFind(&local_client_list, source_p) == NULL); assert(dlinkFind(&serv_list, source_p) == NULL); assert(dlinkFind(&oper_list, source_p) == NULL); exit_one_client(source_p, comment); } /* * dead_link_on_write - report a write error if not already dead, * mark it as dead then exit it */ void dead_link_on_write(struct Client *client_p, int ierrno) { dlink_node *ptr; if (IsDefunct(client_p)) return; dbuf_clear(&client_p->localClient->buf_recvq); dbuf_clear(&client_p->localClient->buf_sendq); assert(dlinkFind(&abort_list, client_p) == NULL); ptr = make_dlink_node(); /* don't let exit_aborted_clients() finish yet */ dlinkAddTail(client_p, ptr, &abort_list); if (eac_next == NULL) eac_next = ptr; SetDead(client_p); /* You are dead my friend */ } /* * dead_link_on_read - report a read error if not already dead, * mark it as dead then exit it */ void dead_link_on_read(struct Client *client_p, int error) { char errmsg[IRCD_BUFSIZE]; int current_error; if (IsDefunct(client_p)) return; dbuf_clear(&client_p->localClient->buf_recvq); dbuf_clear(&client_p->localClient->buf_sendq); current_error = get_sockerr(client_p->localClient->fd.fd); if (IsServer(client_p) || IsHandshake(client_p)) { int connected = CurrentTime - client_p->localClient->firsttime; if (error == 0) { /* Admins get the real IP */ sendto_realops_flags(UMODE_ALL, L_ADMIN, SEND_NOTICE, "Server %s closed the connection", get_client_name(client_p, SHOW_IP)); /* Opers get a masked IP */ sendto_realops_flags(UMODE_ALL, L_OPER, SEND_NOTICE, "Server %s closed the connection", get_client_name(client_p, MASK_IP)); ilog(LOG_TYPE_IRCD, "Server %s closed the connection", get_client_name(client_p, SHOW_IP)); } else { report_error(L_ADMIN, "Lost connection to %s: %s", get_client_name(client_p, SHOW_IP), current_error); report_error(L_OPER, "Lost connection to %s: %s", get_client_name(client_p, MASK_IP), current_error); } sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s had been connected for %d day%s, %2d:%02d:%02d", client_p->name, connected/86400, (connected/86400 == 1) ? "" : "s", (connected % 86400) / 3600, (connected % 3600) / 60, connected % 60); } if (error == 0) strlcpy(errmsg, "Remote host closed the connection", sizeof(errmsg)); else snprintf(errmsg, sizeof(errmsg), "Read error: %s", strerror(current_error)); exit_client(client_p, &me, errmsg); } void exit_aborted_clients(void) { dlink_node *ptr; struct Client *target_p; const char *notice; DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head) { target_p = ptr->data; eac_next = ptr->next; if (target_p == NULL) { sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "Warning: null client on abort_list!"); dlinkDelete(ptr, &abort_list); free_dlink_node(ptr); continue; } dlinkDelete(ptr, &abort_list); if (IsSendQExceeded(target_p)) notice = "Max SendQ exceeded"; else notice = "Write error: connection closed"; exit_client(target_p, &me, notice); free_dlink_node(ptr); } } /* * accept processing, this adds a form of "caller ID" to ircd * * If a client puts themselves into "caller ID only" mode, * only clients that match a client pointer they have put on * the accept list will be allowed to message them. * * Diane Bruce, "Dianora" db@db.net */ void del_accept(struct split_nuh_item *accept_p, struct Client *client_p) { dlinkDelete(&accept_p->node, &client_p->localClient->acceptlist); MyFree(accept_p->nickptr); MyFree(accept_p->userptr); MyFree(accept_p->hostptr); MyFree(accept_p); } struct split_nuh_item * find_accept(const char *nick, const char *user, const char *host, struct Client *client_p, int (*cmpfunc)(const char *, const char *)) { dlink_node *ptr = NULL; DLINK_FOREACH(ptr, client_p->localClient->acceptlist.head) { struct split_nuh_item *accept_p = ptr->data; if (!cmpfunc(accept_p->nickptr, nick) && !cmpfunc(accept_p->userptr, user) && !cmpfunc(accept_p->hostptr, host)) return accept_p; } return NULL; } /* accept_message() * * inputs - pointer to source client * - pointer to target client * output - 1 if accept this message 0 if not * side effects - See if source is on target's allow list */ int accept_message(struct Client *source, struct Client *target) { dlink_node *ptr = NULL; if (source == target || find_accept(source->name, source->username, source->host, target, match)) return 1; if (HasUMode(target, UMODE_SOFTCALLERID)) DLINK_FOREACH(ptr, target->channel.head) if (IsMember(source, ((struct Membership *)ptr->data)->chptr)) return 1; return 0; } /* del_all_accepts() * * inputs - pointer to exiting client * output - NONE * side effects - Walk through given clients acceptlist and remove all entries */ void del_all_accepts(struct Client *client_p) { dlink_node *ptr = NULL, *next_ptr = NULL; DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->acceptlist.head) del_accept(ptr->data, client_p); } unsigned int idle_time_get(const struct Client *source_p, const struct Client *target_p) { unsigned int idle = 0; unsigned int min_idle = 0; unsigned int max_idle = 0; const struct ClassItem *class = get_class_ptr(&target_p->localClient->confs); if (!(class->flags & CLASS_FLAGS_FAKE_IDLE) || target_p == source_p) return CurrentTime - target_p->localClient->last_privmsg; if (HasUMode(source_p, UMODE_OPER) && !(class->flags & CLASS_FLAGS_HIDE_IDLE_FROM_OPERS)) return CurrentTime - target_p->localClient->last_privmsg; min_idle = class->min_idle; max_idle = class->max_idle; if (min_idle == max_idle) return min_idle; if (class->flags & CLASS_FLAGS_RANDOM_IDLE) idle = genrand_int32(); else idle = CurrentTime - target_p->localClient->last_privmsg; if (max_idle == 0) idle = 0; else idle %= max_idle; if (idle < min_idle) idle = min_idle + (idle % (max_idle - min_idle)); return idle; }