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adx |
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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* client.c: Controls clients. |
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* |
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* Copyright (C) 2002 by the past and present ircd coders, and others. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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* |
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knight |
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* $Id$ |
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adx |
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*/ |
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#include "stdinc.h" |
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#include "tools.h" |
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#include "client.h" |
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#include "channel_mode.h" |
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#include "common.h" |
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#include "event.h" |
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#include "fdlist.h" |
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#include "hash.h" |
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#include "irc_string.h" |
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#include "sprintf_irc.h" |
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#include "ircd.h" |
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#include "list.h" |
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#include "s_gline.h" |
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#include "numeric.h" |
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#include "packet.h" |
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#include "s_auth.h" |
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#include "s_bsd.h" |
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#include "s_conf.h" |
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#include "s_log.h" |
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#include "s_misc.h" |
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#include "s_serv.h" |
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#include "send.h" |
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#include "whowas.h" |
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#include "s_user.h" |
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#include "dbuf.h" |
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#include "memory.h" |
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#include "hostmask.h" |
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#include "balloc.h" |
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#include "listener.h" |
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#include "irc_res.h" |
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#include "userhost.h" |
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dlink_list listing_client_list = { NULL, NULL, 0 }; |
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/* Pointer to beginning of Client list */ |
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dlink_list global_client_list = {NULL, NULL, 0}; |
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/* unknown/client pointer lists */ |
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dlink_list unknown_list = {NULL, NULL, 0}; |
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dlink_list local_client_list = {NULL, NULL, 0}; |
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dlink_list serv_list = {NULL, NULL, 0}; |
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dlink_list global_serv_list = {NULL, NULL, 0}; |
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dlink_list oper_list = {NULL, NULL, 0}; |
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static EVH check_pings; |
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static BlockHeap *client_heap = NULL; |
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static BlockHeap *lclient_heap = NULL; |
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static dlink_list dead_list = { NULL, NULL, 0}; |
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static dlink_list abort_list = { NULL, NULL, 0}; |
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static dlink_node *eac_next; /* next aborted client to exit */ |
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static void check_pings_list(dlink_list *); |
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static void check_unknowns_list(void); |
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static void ban_them(struct Client *client_p, struct ConfItem *conf); |
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/* init_client() |
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* |
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* inputs - NONE |
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* output - NONE |
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* side effects - initialize client free memory |
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*/ |
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void |
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init_client(void) |
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{ |
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/* start off the check ping event .. -- adrian |
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* Every 30 seconds is plenty -- db |
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*/ |
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client_heap = BlockHeapCreate("client", sizeof(struct Client), CLIENT_HEAP_SIZE); |
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lclient_heap = BlockHeapCreate("local client", sizeof(struct LocalUser), LCLIENT_HEAP_SIZE); |
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eventAdd("check_pings", check_pings, NULL, 5); |
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} |
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/* |
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* make_client - create a new Client struct and set it to initial state. |
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* |
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* from == NULL, create local client (a client connected |
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* to a socket). |
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* WARNING: This leaves the client in a dangerous |
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* state where fd == -1, dead flag is not set and |
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* the client is on the unknown_list; therefore, |
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* the first thing to do after calling make_client(NULL) |
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* is setting fd to something reasonable. -adx |
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* |
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* from, create remote client (behind a socket |
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* associated with the client defined by |
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* 'from'). ('from' is a local client!!). |
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*/ |
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struct Client * |
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make_client(struct Client *from) |
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{ |
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struct Client *client_p = BlockHeapAlloc(client_heap); |
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if (from == NULL) |
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{ |
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client_p->from = client_p; /* 'from' of local client is self! */ |
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client_p->since = client_p->lasttime = client_p->firsttime = CurrentTime; |
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client_p->localClient = BlockHeapAlloc(lclient_heap); |
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/* as good a place as any... */ |
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dlinkAdd(client_p, make_dlink_node(), &unknown_list); |
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} |
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else |
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client_p->from = from; /* 'from' of local client is self! */ |
130 |
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client_p->hnext = client_p; |
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client_p->status = STAT_UNKNOWN; |
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strcpy(client_p->username, "unknown"); |
134 |
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135 |
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return client_p; |
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} |
137 |
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138 |
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/* |
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* free_client |
140 |
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* |
141 |
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* inputs - pointer to client |
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* output - NONE |
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* side effects - client pointed to has its memory freed |
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*/ |
145 |
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static void |
146 |
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free_client(struct Client *client_p) |
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{ |
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assert(client_p != NULL); |
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assert(client_p != &me); |
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assert(client_p->hnext == client_p); |
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assert(client_p->invited.head == NULL); |
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assert(client_p->channel.head == NULL); |
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assert(dlink_list_length(&client_p->invited) == 0); |
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assert(dlink_list_length(&client_p->channel) == 0); |
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156 |
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MyFree(client_p->away); |
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MyFree(client_p->serv); |
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159 |
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if (MyConnect(client_p)) |
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{ |
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assert(IsClosing(client_p) && IsDead(client_p)); |
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163 |
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MyFree(client_p->localClient->response); |
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MyFree(client_p->localClient->auth_oper); |
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166 |
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/* |
167 |
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* clean up extra sockets from P-lines which have been discarded. |
168 |
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*/ |
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if (client_p->localClient->listener) |
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{ |
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assert(0 < client_p->localClient->listener->ref_count); |
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if (0 == --client_p->localClient->listener->ref_count && |
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!client_p->localClient->listener->active) |
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free_listener(client_p->localClient->listener); |
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} |
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dbuf_clear(&client_p->localClient->buf_recvq); |
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dbuf_clear(&client_p->localClient->buf_sendq); |
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180 |
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BlockHeapFree(lclient_heap, client_p->localClient); |
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} |
182 |
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BlockHeapFree(client_heap, client_p); |
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} |
185 |
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186 |
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/* |
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* check_pings - go through the local client list and check activity |
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* kill off stuff that should die |
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* |
190 |
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* inputs - NOT USED (from event) |
191 |
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* output - next time_t when check_pings() should be called again |
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* side effects - |
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* |
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* |
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* A PING can be sent to clients as necessary. |
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* |
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* Client/Server ping outs are handled. |
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*/ |
199 |
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200 |
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/* |
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* Addon from adrian. We used to call this after nextping seconds, |
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* however I've changed it to run once a second. This is only for |
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* PING timeouts, not K/etc-line checks (thanks dianora!). Having it |
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* run once a second makes life a lot easier - when a new client connects |
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* and they need a ping in 4 seconds, if nextping was set to 20 seconds |
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* we end up waiting 20 seconds. This is stupid. :-) |
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* I will optimise (hah!) check_pings() once I've finished working on |
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* tidying up other network IO evilnesses. |
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* -- adrian |
210 |
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*/ |
211 |
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212 |
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static void |
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check_pings(void *notused) |
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{ |
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check_pings_list(&local_client_list); |
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check_pings_list(&serv_list); |
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check_unknowns_list(); |
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} |
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/* check_pings_list() |
221 |
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* |
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* inputs - pointer to list to check |
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* output - NONE |
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* side effects - |
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*/ |
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static void |
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check_pings_list(dlink_list *list) |
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{ |
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char scratch[32]; /* way too generous but... */ |
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struct Client *client_p; /* current local client_p being examined */ |
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int ping, pingwarn; /* ping time value from client */ |
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dlink_node *ptr, *next_ptr; |
233 |
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234 |
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DLINK_FOREACH_SAFE(ptr, next_ptr, list->head) |
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{ |
236 |
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client_p = ptr->data; |
237 |
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238 |
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/* |
239 |
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** Note: No need to notify opers here. It's |
240 |
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** already done when "FLAGS_DEADSOCKET" is set. |
241 |
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*/ |
242 |
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if (IsDead(client_p)) |
243 |
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{ |
244 |
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/* Ignore it, its been exited already */ |
245 |
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continue; |
246 |
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} |
247 |
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248 |
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if (client_p->localClient->reject_delay > 0) |
249 |
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{ |
250 |
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if (client_p->localClient->reject_delay <= CurrentTime) |
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exit_client(client_p, &me, "Rejected"); |
252 |
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continue; |
253 |
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} |
254 |
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255 |
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if (GlobalSetOptions.idletime && IsClient(client_p)) |
256 |
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{ |
257 |
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if (!IsExemptKline(client_p) && !IsOper(client_p) && |
258 |
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!IsIdlelined(client_p) && |
259 |
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((CurrentTime - client_p->localClient->last) > GlobalSetOptions.idletime)) |
260 |
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{ |
261 |
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struct ConfItem *conf; |
262 |
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struct AccessItem *aconf; |
263 |
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264 |
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conf = make_conf_item(KLINE_TYPE); |
265 |
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aconf = (struct AccessItem *)map_to_conf(conf); |
266 |
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267 |
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DupString(aconf->host, client_p->host); |
268 |
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DupString(aconf->reason, "idle exceeder"); |
269 |
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DupString(aconf->user, client_p->username); |
270 |
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aconf->hold = CurrentTime + 60; |
271 |
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add_temp_line(conf); |
272 |
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273 |
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sendto_realops_flags(UMODE_ALL, L_ALL, |
274 |
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"Idle time limit exceeded for %s - temp k-lining", |
275 |
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get_client_name(client_p, HIDE_IP)); |
276 |
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exit_client(client_p, &me, aconf->reason); |
277 |
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continue; |
278 |
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} |
279 |
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} |
280 |
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281 |
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if (!IsRegistered(client_p)) |
282 |
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ping = CONNECTTIMEOUT, pingwarn = 0; |
283 |
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else |
284 |
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ping = get_client_ping(client_p, &pingwarn); |
285 |
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286 |
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if (ping < CurrentTime - client_p->lasttime) |
287 |
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{ |
288 |
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if (!IsPingSent(client_p)) |
289 |
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{ |
290 |
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/* |
291 |
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* if we havent PINGed the connection and we havent |
292 |
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* heard from it in a while, PING it to make sure |
293 |
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* it is still alive. |
294 |
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*/ |
295 |
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SetPingSent(client_p); |
296 |
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ClearPingWarning(client_p); |
297 |
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client_p->lasttime = CurrentTime - ping; |
298 |
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sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p)); |
299 |
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} |
300 |
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else |
301 |
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{ |
302 |
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if (CurrentTime - client_p->lasttime >= 2 * ping) |
303 |
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{ |
304 |
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/* |
305 |
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* If the client/server hasn't talked to us in 2*ping seconds |
306 |
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* and it has a ping time, then close its connection. |
307 |
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*/ |
308 |
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if (IsServer(client_p) || IsHandshake(client_p)) |
309 |
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{ |
310 |
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sendto_realops_flags(UMODE_ALL, L_ADMIN, |
311 |
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"No response from %s, closing link", |
312 |
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get_client_name(client_p, HIDE_IP)); |
313 |
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sendto_realops_flags(UMODE_ALL, L_OPER, |
314 |
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"No response from %s, closing link", |
315 |
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get_client_name(client_p, MASK_IP)); |
316 |
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ilog(L_NOTICE, "No response from %s, closing link", |
317 |
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get_client_name(client_p, HIDE_IP)); |
318 |
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} |
319 |
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ircsprintf(scratch, "Ping timeout: %d seconds", |
320 |
|
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(int)(CurrentTime - client_p->lasttime)); |
321 |
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|
322 |
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exit_client(client_p, &me, scratch); |
323 |
|
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} |
324 |
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else if (!IsPingWarning(client_p) && pingwarn > 0 && |
325 |
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(IsServer(client_p) || IsHandshake(client_p)) && |
326 |
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CurrentTime - client_p->lasttime >= ping + pingwarn) |
327 |
|
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{ |
328 |
|
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/* |
329 |
|
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* If the server hasn't replied in pingwarn seconds after sending |
330 |
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* the PING, notify the opers so that they are aware of the problem. |
331 |
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*/ |
332 |
|
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SetPingWarning(client_p); |
333 |
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sendto_realops_flags(UMODE_ALL, L_ADMIN, |
334 |
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"Warning, no response from %s in %d seconds", |
335 |
|
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get_client_name(client_p, HIDE_IP), pingwarn); |
336 |
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sendto_realops_flags(UMODE_ALL, L_OPER, |
337 |
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"Warning, no response from %s in %d seconds", |
338 |
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get_client_name(client_p, MASK_IP), pingwarn); |
339 |
|
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ilog(L_NOTICE, "No response from %s in %d seconds", |
340 |
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get_client_name(client_p, HIDE_IP), pingwarn); |
341 |
|
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} |
342 |
|
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} |
343 |
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} |
344 |
|
|
} |
345 |
|
|
} |
346 |
|
|
|
347 |
|
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/* check_unknowns_list() |
348 |
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* |
349 |
|
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* inputs - pointer to list of unknown clients |
350 |
|
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* output - NONE |
351 |
|
|
* side effects - unknown clients get marked for termination after n seconds |
352 |
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|
*/ |
353 |
|
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static void |
354 |
|
|
check_unknowns_list(void) |
355 |
|
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{ |
356 |
|
|
dlink_node *ptr, *next_ptr; |
357 |
|
|
|
358 |
|
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DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head) |
359 |
|
|
{ |
360 |
|
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struct Client *client_p = ptr->data; |
361 |
|
|
|
362 |
|
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if (client_p->localClient->reject_delay > 0) |
363 |
|
|
{ |
364 |
|
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if (client_p->localClient->reject_delay <= CurrentTime) |
365 |
|
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exit_client(client_p, &me, "Rejected"); |
366 |
|
|
continue; |
367 |
|
|
} |
368 |
|
|
|
369 |
|
|
/* Check UNKNOWN connections - if they have been in this state |
370 |
|
|
* for > 30s, close them. |
371 |
|
|
*/ |
372 |
|
|
if (client_p->firsttime ? ((CurrentTime - client_p->firsttime) > 30) : 0) |
373 |
|
|
exit_client(client_p, &me, "Connection timed out"); |
374 |
|
|
} |
375 |
|
|
} |
376 |
|
|
|
377 |
|
|
/* check_conf_klines() |
378 |
|
|
* |
379 |
|
|
* inputs - NONE |
380 |
|
|
* output - NONE |
381 |
|
|
* side effects - Check all connections for a pending kline against the |
382 |
|
|
* client, exit the client if a kline matches. |
383 |
|
|
*/ |
384 |
|
|
void |
385 |
|
|
check_conf_klines(void) |
386 |
|
|
{ |
387 |
|
|
struct Client *client_p = NULL; /* current local client_p being examined */ |
388 |
|
|
struct AccessItem *aconf = NULL; |
389 |
|
|
struct ConfItem *conf = NULL; |
390 |
|
|
dlink_node *ptr, *next_ptr; |
391 |
|
|
|
392 |
|
|
DLINK_FOREACH_SAFE(ptr, next_ptr, local_client_list.head) |
393 |
|
|
{ |
394 |
|
|
client_p = ptr->data; |
395 |
|
|
|
396 |
|
|
/* If a client is already being exited |
397 |
|
|
*/ |
398 |
|
|
if (IsDead(client_p) || !IsClient(client_p)) |
399 |
|
|
continue; |
400 |
|
|
|
401 |
|
|
/* if there is a returned struct ConfItem then kill it */ |
402 |
|
|
if ((aconf = find_dline_conf(&client_p->localClient->ip, |
403 |
|
|
client_p->localClient->aftype)) != NULL) |
404 |
|
|
{ |
405 |
|
|
if (aconf->status & CONF_EXEMPTDLINE) |
406 |
|
|
continue; |
407 |
|
|
|
408 |
|
|
conf = unmap_conf_item(aconf); |
409 |
|
|
ban_them(client_p, conf); |
410 |
|
|
continue; /* and go examine next fd/client_p */ |
411 |
|
|
} |
412 |
|
|
|
413 |
|
|
if (ConfigFileEntry.glines && (aconf = find_gline(client_p))) |
414 |
|
|
{ |
415 |
|
|
if (IsExemptKline(client_p) || |
416 |
|
|
IsExemptGline(client_p)) |
417 |
|
|
{ |
418 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
419 |
|
|
"GLINE over-ruled for %s, client is %sline_exempt", |
420 |
|
|
get_client_name(client_p, HIDE_IP), IsExemptKline(client_p) ? "k" : "g"); |
421 |
|
|
continue; |
422 |
|
|
} |
423 |
|
|
|
424 |
|
|
conf = unmap_conf_item(aconf); |
425 |
|
|
ban_them(client_p, conf); |
426 |
|
|
/* and go examine next fd/client_p */ |
427 |
|
|
continue; |
428 |
|
|
} |
429 |
|
|
|
430 |
|
|
if ((aconf = find_kill(client_p)) != NULL) |
431 |
|
|
{ |
432 |
|
|
|
433 |
|
|
/* if there is a returned struct AccessItem.. then kill it */ |
434 |
|
|
if (IsExemptKline(client_p)) |
435 |
|
|
{ |
436 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
437 |
|
|
"KLINE over-ruled for %s, client is kline_exempt", |
438 |
|
|
get_client_name(client_p, HIDE_IP)); |
439 |
|
|
continue; |
440 |
|
|
} |
441 |
|
|
|
442 |
|
|
conf = unmap_conf_item(aconf); |
443 |
|
|
ban_them(client_p, conf); |
444 |
|
|
continue; |
445 |
|
|
} |
446 |
|
|
|
447 |
|
|
/* if there is a returned struct MatchItem then kill it */ |
448 |
|
|
if ((conf = find_matching_name_conf(XLINE_TYPE, client_p->info, |
449 |
|
|
NULL, NULL, 0)) != NULL || |
450 |
|
|
(conf = find_matching_name_conf(RXLINE_TYPE, client_p->info, |
451 |
|
|
NULL, NULL, 0)) != NULL) |
452 |
|
|
{ |
453 |
|
|
ban_them(client_p, conf); |
454 |
|
|
continue; |
455 |
|
|
} |
456 |
|
|
} |
457 |
|
|
|
458 |
|
|
/* also check the unknowns list for new dlines */ |
459 |
|
|
DLINK_FOREACH_SAFE(ptr, next_ptr, unknown_list.head) |
460 |
|
|
{ |
461 |
|
|
client_p = ptr->data; |
462 |
|
|
|
463 |
|
|
if ((aconf = find_dline_conf(&client_p->localClient->ip, |
464 |
|
|
client_p->localClient->aftype))) |
465 |
|
|
{ |
466 |
|
|
if (aconf->status & CONF_EXEMPTDLINE) |
467 |
|
|
continue; |
468 |
|
|
|
469 |
|
|
exit_client(client_p, &me, "D-lined"); |
470 |
|
|
} |
471 |
|
|
} |
472 |
|
|
} |
473 |
|
|
|
474 |
|
|
/* |
475 |
|
|
* ban_them |
476 |
|
|
* |
477 |
|
|
* inputs - pointer to client to ban |
478 |
|
|
* - pointer to ConfItem |
479 |
|
|
* output - NONE |
480 |
|
|
* side effects - given client_p is banned |
481 |
|
|
*/ |
482 |
|
|
static void |
483 |
|
|
ban_them(struct Client *client_p, struct ConfItem *conf) |
484 |
|
|
{ |
485 |
|
|
const char *user_reason = NULL; /* What is sent to user */ |
486 |
|
|
const char *channel_reason = NULL; /* What is sent to channel */ |
487 |
|
|
struct AccessItem *aconf = NULL; |
488 |
|
|
struct MatchItem *xconf = NULL; |
489 |
|
|
const char *type_string = NULL; |
490 |
|
|
const char dline_string[] = "D-line"; |
491 |
|
|
const char kline_string[] = "K-line"; |
492 |
|
|
const char gline_string[] = "G-line"; |
493 |
|
|
const char xline_string[] = "X-line"; |
494 |
|
|
|
495 |
|
|
switch (conf->type) |
496 |
|
|
{ |
497 |
|
|
case RKLINE_TYPE: |
498 |
|
|
case KLINE_TYPE: |
499 |
|
|
type_string = kline_string; |
500 |
|
|
aconf = map_to_conf(conf); |
501 |
|
|
break; |
502 |
|
|
case DLINE_TYPE: |
503 |
|
|
type_string = dline_string; |
504 |
|
|
aconf = map_to_conf(conf); |
505 |
|
|
break; |
506 |
|
|
case GLINE_TYPE: |
507 |
|
|
type_string = gline_string; |
508 |
|
|
aconf = map_to_conf(conf); |
509 |
|
|
break; |
510 |
|
|
case RXLINE_TYPE: |
511 |
|
|
case XLINE_TYPE: |
512 |
|
|
type_string = xline_string; |
513 |
|
|
xconf = map_to_conf(conf); |
514 |
|
|
++xconf->count; |
515 |
|
|
break; |
516 |
|
|
default: |
517 |
|
|
assert(0); |
518 |
|
|
break; |
519 |
|
|
} |
520 |
|
|
|
521 |
|
|
if (ConfigFileEntry.kline_with_reason) |
522 |
|
|
{ |
523 |
|
|
if (aconf != NULL) |
524 |
|
|
user_reason = aconf->reason ? aconf->reason : type_string; |
525 |
|
|
if (xconf != NULL) |
526 |
|
|
user_reason = xconf->reason ? xconf->reason : type_string; |
527 |
|
|
} |
528 |
|
|
else |
529 |
|
|
user_reason = type_string; |
530 |
|
|
|
531 |
|
|
if (ConfigFileEntry.kline_reason != NULL) |
532 |
|
|
channel_reason = ConfigFileEntry.kline_reason; |
533 |
|
|
else |
534 |
|
|
channel_reason = user_reason; |
535 |
|
|
|
536 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, "%s active for %s", |
537 |
|
|
type_string, get_client_name(client_p, HIDE_IP)); |
538 |
|
|
|
539 |
|
|
if (IsClient(client_p)) |
540 |
|
|
sendto_one(client_p, form_str(ERR_YOUREBANNEDCREEP), |
541 |
|
|
me.name, client_p->name, user_reason); |
542 |
|
|
|
543 |
|
|
exit_client(client_p, &me, channel_reason); |
544 |
|
|
} |
545 |
|
|
|
546 |
|
|
/* update_client_exit_stats() |
547 |
|
|
* |
548 |
|
|
* input - pointer to client |
549 |
|
|
* output - NONE |
550 |
|
|
* side effects - |
551 |
|
|
*/ |
552 |
|
|
static void |
553 |
|
|
update_client_exit_stats(struct Client *client_p) |
554 |
|
|
{ |
555 |
|
|
if (IsServer(client_p)) |
556 |
|
|
{ |
557 |
|
|
sendto_realops_flags(UMODE_EXTERNAL, L_ALL, |
558 |
|
|
"Server %s split from %s", |
559 |
|
|
client_p->name, client_p->servptr->name); |
560 |
|
|
} |
561 |
|
|
else if (IsClient(client_p)) |
562 |
|
|
{ |
563 |
|
|
--Count.total; |
564 |
|
|
if (IsOper(client_p)) |
565 |
|
|
--Count.oper; |
566 |
|
|
if (IsInvisible(client_p)) |
567 |
|
|
--Count.invisi; |
568 |
|
|
} |
569 |
|
|
|
570 |
|
|
if (splitchecking && !splitmode) |
571 |
|
|
check_splitmode(NULL); |
572 |
|
|
} |
573 |
|
|
|
574 |
|
|
/* find_person() |
575 |
|
|
* |
576 |
|
|
* inputs - pointer to name |
577 |
|
|
* output - return client pointer |
578 |
|
|
* side effects - find person by (nick)name |
579 |
|
|
*/ |
580 |
|
|
/* XXX - ugly wrapper */ |
581 |
|
|
struct Client * |
582 |
|
|
find_person(const struct Client *client_p, const char *name) |
583 |
|
|
{ |
584 |
|
|
struct Client *c2ptr; |
585 |
|
|
|
586 |
|
|
if (IsDigit(*name)) |
587 |
|
|
{ |
588 |
|
|
if ((c2ptr = hash_find_id(name)) != NULL) |
589 |
|
|
{ |
590 |
|
|
/* invisible users shall not be found by UID guessing */ |
591 |
|
|
if (IsInvisible(c2ptr) && !IsServer(client_p)) |
592 |
|
|
c2ptr = NULL; |
593 |
|
|
} |
594 |
|
|
} |
595 |
|
|
else |
596 |
|
|
c2ptr = find_client(name); |
597 |
|
|
|
598 |
|
|
return ((c2ptr != NULL && IsClient(c2ptr)) ? c2ptr : NULL); |
599 |
|
|
} |
600 |
|
|
|
601 |
|
|
/* |
602 |
|
|
* find_chasing - find the client structure for a nick name (user) |
603 |
|
|
* using history mechanism if necessary. If the client is not found, |
604 |
|
|
* an error message (NO SUCH NICK) is generated. If the client was found |
605 |
|
|
* through the history, chasing will be 1 and otherwise 0. |
606 |
|
|
*/ |
607 |
|
|
struct Client * |
608 |
|
|
find_chasing(struct Client *client_p, struct Client *source_p, const char *user, int *chasing) |
609 |
|
|
{ |
610 |
|
|
struct Client *who = find_person(client_p, user); |
611 |
|
|
|
612 |
|
|
if (chasing) |
613 |
|
|
*chasing = 0; |
614 |
|
|
|
615 |
|
|
if (who) |
616 |
|
|
return(who); |
617 |
|
|
|
618 |
|
|
if (IsDigit(*user)) |
619 |
|
|
return(NULL); |
620 |
|
|
|
621 |
|
|
if ((who = get_history(user, |
622 |
|
|
(time_t)ConfigFileEntry.kill_chase_time_limit)) |
623 |
|
|
== NULL) |
624 |
|
|
{ |
625 |
|
|
sendto_one(source_p, form_str(ERR_NOSUCHNICK), |
626 |
|
|
me.name, source_p->name, user); |
627 |
|
|
return(NULL); |
628 |
|
|
} |
629 |
|
|
|
630 |
|
|
if (chasing) |
631 |
|
|
*chasing = 1; |
632 |
|
|
|
633 |
|
|
return(who); |
634 |
|
|
} |
635 |
|
|
|
636 |
|
|
/* |
637 |
|
|
* get_client_name - Return the name of the client |
638 |
|
|
* for various tracking and |
639 |
|
|
* admin purposes. The main purpose of this function is to |
640 |
|
|
* return the "socket host" name of the client, if that |
641 |
|
|
* differs from the advertised name (other than case). |
642 |
|
|
* But, this can be used to any client structure. |
643 |
|
|
* |
644 |
|
|
* NOTE 1: |
645 |
|
|
* Watch out the allocation of "nbuf", if either source_p->name |
646 |
|
|
* or source_p->sockhost gets changed into pointers instead of |
647 |
|
|
* directly allocated within the structure... |
648 |
|
|
* |
649 |
|
|
* NOTE 2: |
650 |
|
|
* Function return either a pointer to the structure (source_p) or |
651 |
|
|
* to internal buffer (nbuf). *NEVER* use the returned pointer |
652 |
|
|
* to modify what it points!!! |
653 |
|
|
*/ |
654 |
|
|
const char * |
655 |
|
|
get_client_name(struct Client *client, int showip) |
656 |
|
|
{ |
657 |
|
|
static char nbuf[HOSTLEN * 2 + USERLEN + 5]; |
658 |
|
|
|
659 |
|
|
assert(client != NULL); |
660 |
|
|
|
661 |
|
|
if (irccmp(client->name, client->host) == 0) |
662 |
|
|
return(client->name); |
663 |
|
|
|
664 |
|
|
if (ConfigServerHide.hide_server_ips) |
665 |
|
|
if (IsServer(client) || IsConnecting(client) || IsHandshake(client)) |
666 |
|
|
showip = MASK_IP; |
667 |
|
|
|
668 |
|
|
if (ConfigFileEntry.hide_spoof_ips) |
669 |
|
|
if (showip == SHOW_IP && IsIPSpoof(client)) |
670 |
|
|
showip = MASK_IP; |
671 |
|
|
|
672 |
|
|
/* And finally, let's get the host information, ip or name */ |
673 |
|
|
switch (showip) |
674 |
|
|
{ |
675 |
|
|
case SHOW_IP: |
676 |
|
|
if (MyConnect(client)) |
677 |
|
|
{ |
678 |
|
|
ircsprintf(nbuf, "%s[%s@%s]", client->name, client->username, |
679 |
|
|
client->sockhost); |
680 |
|
|
break; |
681 |
|
|
} |
682 |
|
|
case MASK_IP: |
683 |
|
|
ircsprintf(nbuf, "%s[%s@255.255.255.255]", client->name, |
684 |
|
|
client->username); |
685 |
|
|
break; |
686 |
|
|
default: |
687 |
|
|
ircsprintf(nbuf, "%s[%s@%s]", client->name, client->username, |
688 |
|
|
client->host); |
689 |
|
|
} |
690 |
|
|
|
691 |
|
|
return(nbuf); |
692 |
|
|
} |
693 |
|
|
|
694 |
|
|
void |
695 |
|
|
free_exited_clients(void) |
696 |
|
|
{ |
697 |
|
|
dlink_node *ptr, *next; |
698 |
|
|
struct Client *target_p; |
699 |
|
|
|
700 |
|
|
DLINK_FOREACH_SAFE(ptr, next, dead_list.head) |
701 |
|
|
{ |
702 |
|
|
target_p = ptr->data; |
703 |
|
|
|
704 |
|
|
if (ptr->data == NULL) |
705 |
|
|
{ |
706 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
707 |
|
|
"Warning: null client on dead_list!"); |
708 |
|
|
dlinkDelete(ptr, &dead_list); |
709 |
|
|
free_dlink_node(ptr); |
710 |
|
|
continue; |
711 |
|
|
} |
712 |
|
|
|
713 |
|
|
free_client(target_p); |
714 |
|
|
dlinkDelete(ptr, &dead_list); |
715 |
|
|
free_dlink_node(ptr); |
716 |
|
|
} |
717 |
|
|
} |
718 |
|
|
|
719 |
|
|
/* |
720 |
|
|
* Exit one client, local or remote. Assuming all dependents have |
721 |
|
|
* been already removed, and socket closed for local client. |
722 |
|
|
* |
723 |
|
|
* The only messages generated are QUITs on channels. |
724 |
|
|
*/ |
725 |
|
|
static void |
726 |
|
|
exit_one_client(struct Client *source_p, const char *quitmsg) |
727 |
|
|
{ |
728 |
|
|
dlink_node *lp = NULL, *next_lp = NULL; |
729 |
|
|
|
730 |
|
|
assert(!IsMe(source_p)); |
731 |
|
|
|
732 |
|
|
if (IsServer(source_p)) |
733 |
|
|
{ |
734 |
|
|
dlinkDelete(&source_p->lnode, &source_p->servptr->serv->servers); |
735 |
|
|
|
736 |
|
|
if ((lp = dlinkFindDelete(&global_serv_list, source_p)) != NULL) |
737 |
|
|
free_dlink_node(lp); |
738 |
|
|
|
739 |
|
|
if (!MyConnect(source_p)) |
740 |
|
|
{ |
741 |
|
|
source_p->from->serv->dep_servers--; |
742 |
|
|
assert(source_p->from->serv->dep_servers > 0); |
743 |
|
|
} |
744 |
|
|
} |
745 |
|
|
else if (IsClient(source_p)) |
746 |
|
|
{ |
747 |
|
|
if (source_p->servptr->serv != NULL) |
748 |
|
|
dlinkDelete(&source_p->lnode, &source_p->servptr->serv->users); |
749 |
|
|
|
750 |
|
|
/* If a person is on a channel, send a QUIT notice |
751 |
|
|
** to every client (person) on the same channel (so |
752 |
|
|
** that the client can show the "**signoff" message). |
753 |
|
|
** (Note: The notice is to the local clients *only*) |
754 |
|
|
*/ |
755 |
|
|
sendto_common_channels_local(source_p, 0, ":%s!%s@%s QUIT :%s", |
756 |
|
|
source_p->name, source_p->username, |
757 |
|
|
source_p->host, quitmsg); |
758 |
|
|
DLINK_FOREACH_SAFE(lp, next_lp, source_p->channel.head) |
759 |
|
|
remove_user_from_channel(lp->data); |
760 |
|
|
|
761 |
|
|
/* Clean up invitefield */ |
762 |
|
|
DLINK_FOREACH_SAFE(lp, next_lp, source_p->invited.head) |
763 |
|
|
del_invite(lp->data, source_p); |
764 |
|
|
|
765 |
|
|
/* Clean up allow lists */ |
766 |
|
|
del_all_accepts(source_p); |
767 |
|
|
add_history(source_p, 0); |
768 |
|
|
off_history(source_p); |
769 |
|
|
|
770 |
|
|
if (!MyConnect(source_p)) |
771 |
|
|
{ |
772 |
|
|
source_p->from->serv->dep_users--; |
773 |
|
|
assert(source_p->from->serv->dep_users >= 0); |
774 |
|
|
} |
775 |
|
|
} |
776 |
|
|
|
777 |
|
|
/* Remove source_p from the client lists */ |
778 |
|
|
if (HasID(source_p)) |
779 |
|
|
hash_del_id(source_p); |
780 |
|
|
if (source_p->name[0]) |
781 |
|
|
hash_del_client(source_p); |
782 |
|
|
|
783 |
|
|
if (IsUserHostIp(source_p)) |
784 |
|
|
delete_user_host(source_p->username, source_p->host, !MyConnect(source_p)); |
785 |
|
|
|
786 |
|
|
/* remove from global client list |
787 |
|
|
* NOTE: source_p->node.next cannot be NULL if the client is added |
788 |
|
|
* to global_client_list (there is always &me at its end) |
789 |
|
|
*/ |
790 |
|
|
if (source_p != NULL && source_p->node.next != NULL) |
791 |
|
|
dlinkDelete(&source_p->node, &global_client_list); |
792 |
|
|
|
793 |
|
|
update_client_exit_stats(source_p); |
794 |
|
|
|
795 |
|
|
/* Check to see if the client isn't already on the dead list */ |
796 |
|
|
assert(dlinkFind(&dead_list, source_p) == NULL); |
797 |
|
|
|
798 |
|
|
/* add to dead client dlist */ |
799 |
|
|
SetDead(source_p); |
800 |
|
|
dlinkAdd(source_p, make_dlink_node(), &dead_list); |
801 |
|
|
} |
802 |
|
|
|
803 |
|
|
/* Recursively send QUITs and SQUITs for source_p and all its dependent clients |
804 |
|
|
* and servers to those servers that need them. A server needs the client |
805 |
|
|
* QUITs if it can't figure them out from the SQUIT (ie pre-TS4) or if it |
806 |
|
|
* isn't getting the SQUIT because of @#(*&@)# hostmasking. With TS4, once |
807 |
|
|
* a link gets a SQUIT, it doesn't need any QUIT/SQUITs for clients depending |
808 |
|
|
* on that one -orabidoo |
809 |
|
|
* |
810 |
|
|
* This is now called on each local server -adx |
811 |
|
|
*/ |
812 |
|
|
static void |
813 |
|
|
recurse_send_quits(struct Client *original_source_p, struct Client *source_p, |
814 |
|
|
struct Client *from, struct Client *to, const char *comment, |
815 |
|
|
const char *splitstr, const char *myname) |
816 |
|
|
{ |
817 |
|
|
dlink_node *ptr, *next; |
818 |
|
|
struct Client *target_p; |
819 |
|
|
int hidden = match(myname, source_p->name); |
820 |
|
|
|
821 |
|
|
assert(to != source_p); /* should be already removed from serv_list */ |
822 |
|
|
|
823 |
|
|
/* If this server can handle quit storm (QS) removal |
824 |
|
|
* of dependents, just send the SQUIT |
825 |
|
|
* |
826 |
|
|
* Always check *all* dependent servers if some of them are |
827 |
|
|
* hidden behind fakename. If so, send out the QUITs -adx |
828 |
|
|
*/ |
829 |
|
|
if (hidden || !IsCapable(to, CAP_QS)) |
830 |
|
|
DLINK_FOREACH_SAFE(ptr, next, source_p->serv->users.head) |
831 |
|
|
{ |
832 |
|
|
target_p = ptr->data; |
833 |
|
|
sendto_one(to, ":%s QUIT :%s", target_p->name, splitstr); |
834 |
|
|
} |
835 |
|
|
|
836 |
|
|
DLINK_FOREACH_SAFE(ptr, next, source_p->serv->servers.head) |
837 |
|
|
recurse_send_quits(original_source_p, ptr->data, from, to, |
838 |
|
|
comment, splitstr, myname); |
839 |
|
|
|
840 |
|
|
if (!hidden && ((source_p == original_source_p && to != from) || |
841 |
|
|
!IsCapable(to, CAP_QS))) |
842 |
|
|
{ |
843 |
|
|
/* don't use a prefix here - we have to be 100% sure the message |
844 |
|
|
* will be accepted without Unknown prefix etc.. */ |
845 |
|
|
sendto_one(to, "SQUIT %s :%s", ID_or_name(source_p, to), comment); |
846 |
|
|
} |
847 |
|
|
} |
848 |
|
|
|
849 |
|
|
/* |
850 |
|
|
* Remove all clients that depend on source_p; assumes all (S)QUITs have |
851 |
|
|
* already been sent. we make sure to exit a server's dependent clients |
852 |
|
|
* and servers before the server itself; exit_one_client takes care of |
853 |
|
|
* actually removing things off llists. tweaked from +CSr31 -orabidoo |
854 |
|
|
*/ |
855 |
|
|
static void |
856 |
|
|
recurse_remove_clients(struct Client *source_p, const char *quitmsg) |
857 |
|
|
{ |
858 |
|
|
dlink_node *ptr, *next; |
859 |
|
|
|
860 |
|
|
DLINK_FOREACH_SAFE(ptr, next, source_p->serv->users.head) |
861 |
|
|
exit_one_client(ptr->data, quitmsg); |
862 |
|
|
|
863 |
|
|
DLINK_FOREACH_SAFE(ptr, next, source_p->serv->servers.head) |
864 |
|
|
{ |
865 |
|
|
recurse_remove_clients(ptr->data, quitmsg); |
866 |
|
|
exit_one_client(ptr->data, quitmsg); |
867 |
|
|
} |
868 |
|
|
|
869 |
|
|
assert(source_p->serv->dep_servers == 1); |
870 |
|
|
assert(source_p->serv->dep_users == 0); |
871 |
|
|
} |
872 |
|
|
|
873 |
|
|
/* |
874 |
|
|
** Remove *everything* that depends on source_p, from all lists, and sending |
875 |
|
|
** all necessary QUITs and SQUITs. source_p itself is still on the lists, |
876 |
|
|
** and its SQUITs have been sent except for the upstream one -orabidoo |
877 |
|
|
*/ |
878 |
|
|
static void |
879 |
|
|
remove_dependents(struct Client *source_p, struct Client *from, |
880 |
|
|
const char *comment, const char *splitstr) |
881 |
|
|
{ |
882 |
|
|
struct Client *to; |
883 |
|
|
struct ConfItem *conf; |
884 |
|
|
static char myname[HOSTLEN+1]; |
885 |
|
|
dlink_node *ptr; |
886 |
|
|
|
887 |
|
|
DLINK_FOREACH(ptr, serv_list.head) |
888 |
|
|
{ |
889 |
|
|
to = ptr->data; |
890 |
|
|
|
891 |
|
|
if ((conf = to->serv->sconf) != NULL) |
892 |
|
|
strlcpy(myname, my_name_for_link(conf), sizeof(myname)); |
893 |
|
|
else |
894 |
|
|
strlcpy(myname, me.name, sizeof(myname)); |
895 |
|
|
recurse_send_quits(source_p, source_p, from, to, |
896 |
|
|
comment, splitstr, myname); |
897 |
|
|
} |
898 |
|
|
|
899 |
|
|
recurse_remove_clients(source_p, splitstr); |
900 |
|
|
} |
901 |
|
|
|
902 |
|
|
/* |
903 |
|
|
* exit_client - exit a client of any type. Generally, you can use |
904 |
|
|
* this on any struct Client, regardless of its state. |
905 |
|
|
* |
906 |
|
|
* Note, you shouldn't exit remote _users_ without first doing |
907 |
|
|
* SetKilled and propagating a kill or similar message. However, |
908 |
|
|
* it is perfectly correct to call exit_client to force a _server_ |
909 |
|
|
* quit (either local or remote one). |
910 |
|
|
* |
911 |
|
|
* inputs: - a client pointer that is going to be exited |
912 |
|
|
* - for servers, the second argument is a pointer to who |
913 |
|
|
* is firing the server. This side won't get any generated |
914 |
|
|
* messages. NEVER NULL! |
915 |
|
|
* output: none |
916 |
|
|
* side effects: the client is delinked from all lists, disconnected, |
917 |
|
|
* and the rest of IRC network is notified of the exit. |
918 |
|
|
* Client memory is scheduled to be freed |
919 |
|
|
*/ |
920 |
|
|
void |
921 |
|
|
exit_client(struct Client *source_p, struct Client *from, const char *comment) |
922 |
|
|
{ |
923 |
|
|
dlink_node *m; |
924 |
|
|
|
925 |
|
|
if (MyConnect(source_p)) |
926 |
|
|
{ |
927 |
|
|
/* DO NOT REMOVE. exit_client can be called twice after a failed |
928 |
|
|
* read/write. |
929 |
|
|
*/ |
930 |
|
|
if (IsClosing(source_p)) |
931 |
|
|
return; |
932 |
|
|
|
933 |
|
|
SetClosing(source_p); |
934 |
|
|
|
935 |
|
|
if (IsIpHash(source_p)) |
936 |
|
|
remove_one_ip(&source_p->localClient->ip); |
937 |
|
|
|
938 |
|
|
delete_auth(source_p); |
939 |
|
|
|
940 |
|
|
/* This source_p could have status of one of STAT_UNKNOWN, STAT_CONNECTING |
941 |
|
|
* STAT_HANDSHAKE or STAT_UNKNOWN |
942 |
|
|
* all of which are lumped together into unknown_list |
943 |
|
|
* |
944 |
|
|
* In all above cases IsRegistered() will not be true. |
945 |
|
|
*/ |
946 |
|
|
if (!IsRegistered(source_p)) |
947 |
|
|
{ |
948 |
|
|
if ((m = dlinkFindDelete(&unknown_list, source_p)) != NULL) |
949 |
|
|
free_dlink_node(m); |
950 |
|
|
} |
951 |
|
|
else if (IsClient(source_p)) |
952 |
|
|
{ |
953 |
|
|
Count.local--; |
954 |
|
|
|
955 |
|
|
if (IsOper(source_p)) |
956 |
|
|
{ |
957 |
|
|
if ((m = dlinkFindDelete(&oper_list, source_p)) != NULL) |
958 |
|
|
free_dlink_node(m); |
959 |
|
|
} |
960 |
|
|
|
961 |
|
|
dlinkDelete(&source_p->localClient->lclient_node, &local_client_list); |
962 |
|
|
if (source_p->localClient->list_task != NULL) |
963 |
|
|
free_list_task(source_p->localClient->list_task, source_p); |
964 |
|
|
|
965 |
|
|
sendto_realops_flags(UMODE_CCONN, L_ALL, "Client exiting: %s (%s@%s) [%s] [%s]", |
966 |
|
|
source_p->name, source_p->username, source_p->host, comment, |
967 |
|
|
ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ? |
968 |
|
|
"255.255.255.255" : source_p->sockhost); |
969 |
|
|
} |
970 |
|
|
|
971 |
|
|
/* As soon as a client is known to be a server of some sort |
972 |
|
|
* it has to be put on the serv_list, or SJOIN's to this new server |
973 |
|
|
* from the connect burst will not be seen. |
974 |
|
|
*/ |
975 |
|
|
if (IsServer(source_p) || IsConnecting(source_p) || |
976 |
|
|
IsHandshake(source_p)) |
977 |
|
|
{ |
978 |
|
|
if ((m = dlinkFindDelete(&serv_list, source_p)) != NULL) |
979 |
|
|
{ |
980 |
|
|
free_dlink_node(m); |
981 |
|
|
unset_chcap_usage_counts(source_p); |
982 |
|
|
} |
983 |
|
|
|
984 |
|
|
if (IsServer(source_p)) |
985 |
|
|
{ |
986 |
|
|
Count.myserver--; |
987 |
|
|
if (ServerInfo.hub) |
988 |
|
|
remove_lazylink_flags(source_p->localClient->serverMask); |
989 |
|
|
else |
990 |
|
|
uplink = NULL; |
991 |
|
|
} |
992 |
|
|
} |
993 |
|
|
|
994 |
|
|
log_user_exit(source_p); |
995 |
|
|
|
996 |
|
|
if (!IsDead(source_p)) |
997 |
|
|
{ |
998 |
|
|
if (IsServer(source_p)) |
999 |
|
|
{ |
1000 |
|
|
/* for them, we are exiting the network */ |
1001 |
|
|
sendto_one(source_p, ":%s SQUIT %s :%s", |
1002 |
|
|
ID_or_name(from, source_p), me.name, comment); |
1003 |
|
|
} |
1004 |
|
|
|
1005 |
|
|
sendto_one(source_p, "ERROR :Closing Link: %s (%s)", |
1006 |
|
|
source_p->host, comment); |
1007 |
|
|
} |
1008 |
|
|
|
1009 |
|
|
/* |
1010 |
|
|
** Currently only server connections can have |
1011 |
|
|
** depending remote clients here, but it does no |
1012 |
|
|
** harm to check for all local clients. In |
1013 |
|
|
** future some other clients than servers might |
1014 |
|
|
** have remotes too... |
1015 |
|
|
** |
1016 |
|
|
** Close the Client connection first and mark it |
1017 |
|
|
** so that no messages are attempted to send to it. |
1018 |
|
|
** Remember it makes source_p->from == NULL. |
1019 |
|
|
*/ |
1020 |
|
|
close_connection(source_p); |
1021 |
|
|
} |
1022 |
|
|
|
1023 |
|
|
if (IsServer(source_p)) |
1024 |
|
|
{ |
1025 |
|
|
char splitstr[HOSTLEN + HOSTLEN + 2]; |
1026 |
|
|
|
1027 |
|
|
/* This shouldn't ever happen */ |
1028 |
|
|
assert(source_p->serv != NULL && source_p->servptr != NULL); |
1029 |
|
|
|
1030 |
|
|
if (ConfigServerHide.hide_servers) |
1031 |
|
|
/* set netsplit message to "*.net *.split" to still show |
1032 |
|
|
* that its a split, but hide the servers splitting |
1033 |
|
|
*/ |
1034 |
|
|
strcpy(splitstr, "*.net *.split"); |
1035 |
|
|
else |
1036 |
|
|
snprintf(splitstr, sizeof(splitstr), "%s %s", |
1037 |
|
|
source_p->servptr->name, source_p->name); |
1038 |
|
|
|
1039 |
|
|
remove_dependents(source_p, from->from, comment, splitstr); |
1040 |
|
|
|
1041 |
|
|
if (source_p->servptr == &me) |
1042 |
|
|
{ |
1043 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
1044 |
|
|
"%s was connected for %d seconds. %llu/%llu sendK/recvK.", |
1045 |
|
|
source_p->name, (int)(CurrentTime - source_p->firsttime), |
1046 |
|
|
source_p->localClient->send.bytes >> 10, |
1047 |
|
|
source_p->localClient->recv.bytes >> 10); |
1048 |
|
|
ilog(L_NOTICE, "%s was connected for %d seconds. %llu/%llu sendK/recvK.", |
1049 |
|
|
source_p->name, (int)(CurrentTime - source_p->firsttime), |
1050 |
|
|
source_p->localClient->send.bytes >> 10, |
1051 |
|
|
source_p->localClient->recv.bytes >> 10); |
1052 |
|
|
} |
1053 |
|
|
} |
1054 |
|
|
else if (IsClient(source_p) && !IsKilled(source_p)) |
1055 |
|
|
{ |
1056 |
|
|
sendto_server(NULL, source_p, NULL, CAP_TS6, NOCAPS, NOFLAGS, |
1057 |
|
|
":%s QUIT :%s", ID(source_p), comment); |
1058 |
|
|
sendto_server(NULL, source_p, NULL, NOCAPS, CAP_TS6, NOFLAGS, |
1059 |
|
|
":%s QUIT :%s", source_p->name, comment); |
1060 |
|
|
} |
1061 |
|
|
|
1062 |
|
|
/* The client *better* be off all of the lists */ |
1063 |
|
|
assert(dlinkFind(&unknown_list, source_p) == NULL); |
1064 |
|
|
assert(dlinkFind(&local_client_list, source_p) == NULL); |
1065 |
|
|
assert(dlinkFind(&serv_list, source_p) == NULL); |
1066 |
|
|
assert(dlinkFind(&oper_list, source_p) == NULL); |
1067 |
|
|
|
1068 |
|
|
exit_one_client(source_p, comment); |
1069 |
|
|
} |
1070 |
|
|
|
1071 |
|
|
/* |
1072 |
|
|
* dead_link_on_write - report a write error if not already dead, |
1073 |
|
|
* mark it as dead then exit it |
1074 |
|
|
*/ |
1075 |
|
|
void |
1076 |
|
|
dead_link_on_write(struct Client *client_p, int ierrno) |
1077 |
|
|
{ |
1078 |
|
|
dlink_node *ptr; |
1079 |
|
|
|
1080 |
|
|
if (IsDefunct(client_p)) |
1081 |
|
|
return; |
1082 |
|
|
|
1083 |
|
|
dbuf_clear(&client_p->localClient->buf_recvq); |
1084 |
|
|
dbuf_clear(&client_p->localClient->buf_sendq); |
1085 |
|
|
|
1086 |
|
|
assert(dlinkFind(&abort_list, client_p) == NULL); |
1087 |
|
|
ptr = make_dlink_node(); |
1088 |
|
|
/* don't let exit_aborted_clients() finish yet */ |
1089 |
|
|
dlinkAddTail(client_p, ptr, &abort_list); |
1090 |
|
|
|
1091 |
|
|
if (eac_next == NULL) |
1092 |
|
|
eac_next = ptr; |
1093 |
|
|
|
1094 |
|
|
SetDead(client_p); /* You are dead my friend */ |
1095 |
|
|
} |
1096 |
|
|
|
1097 |
|
|
/* |
1098 |
|
|
* dead_link_on_read - report a read error if not already dead, |
1099 |
|
|
* mark it as dead then exit it |
1100 |
|
|
*/ |
1101 |
|
|
void |
1102 |
|
|
dead_link_on_read(struct Client *client_p, int error) |
1103 |
|
|
{ |
1104 |
|
|
char errmsg[255]; |
1105 |
|
|
int current_error; |
1106 |
|
|
|
1107 |
|
|
if (IsDefunct(client_p)) |
1108 |
|
|
return; |
1109 |
|
|
|
1110 |
|
|
dbuf_clear(&client_p->localClient->buf_recvq); |
1111 |
|
|
dbuf_clear(&client_p->localClient->buf_sendq); |
1112 |
|
|
|
1113 |
|
|
current_error = get_sockerr(client_p->localClient->fd.fd); |
1114 |
|
|
|
1115 |
|
|
if (IsServer(client_p) || IsHandshake(client_p)) |
1116 |
|
|
{ |
1117 |
|
|
int connected = CurrentTime - client_p->firsttime; |
1118 |
|
|
|
1119 |
|
|
if (error == 0) |
1120 |
|
|
{ |
1121 |
|
|
/* Admins get the real IP */ |
1122 |
|
|
sendto_realops_flags(UMODE_ALL, L_ADMIN, |
1123 |
|
|
"Server %s closed the connection", |
1124 |
|
|
get_client_name(client_p, SHOW_IP)); |
1125 |
|
|
|
1126 |
|
|
/* Opers get a masked IP */ |
1127 |
|
|
sendto_realops_flags(UMODE_ALL, L_OPER, |
1128 |
|
|
"Server %s closed the connection", |
1129 |
|
|
get_client_name(client_p, MASK_IP)); |
1130 |
|
|
|
1131 |
|
|
ilog(L_NOTICE, "Server %s closed the connection", |
1132 |
|
|
get_client_name(client_p, SHOW_IP)); |
1133 |
|
|
} |
1134 |
|
|
else |
1135 |
|
|
{ |
1136 |
|
|
report_error(L_ADMIN, "Lost connection to %s: %d", |
1137 |
|
|
get_client_name(client_p, SHOW_IP), current_error); |
1138 |
|
|
report_error(L_OPER, "Lost connection to %s: %d", |
1139 |
|
|
get_client_name(client_p, MASK_IP), current_error); |
1140 |
|
|
} |
1141 |
|
|
|
1142 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
1143 |
|
|
"%s had been connected for %d day%s, %2d:%02d:%02d", |
1144 |
|
|
client_p->name, connected/86400, |
1145 |
|
|
(connected/86400 == 1) ? "" : "s", |
1146 |
|
|
(connected % 86400) / 3600, (connected % 3600) / 60, |
1147 |
|
|
connected % 60); |
1148 |
|
|
} |
1149 |
|
|
|
1150 |
|
|
if (error == 0) |
1151 |
|
|
strlcpy(errmsg, "Remote host closed the connection", |
1152 |
|
|
sizeof(errmsg)); |
1153 |
|
|
else |
1154 |
|
|
ircsprintf(errmsg, "Read error: %s", |
1155 |
|
|
strerror(current_error)); |
1156 |
|
|
|
1157 |
|
|
exit_client(client_p, &me, errmsg); |
1158 |
|
|
} |
1159 |
|
|
|
1160 |
|
|
void |
1161 |
|
|
exit_aborted_clients(void) |
1162 |
|
|
{ |
1163 |
|
|
dlink_node *ptr; |
1164 |
|
|
struct Client *target_p; |
1165 |
|
|
const char *notice; |
1166 |
|
|
|
1167 |
|
|
DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head) |
1168 |
|
|
{ |
1169 |
|
|
target_p = ptr->data; |
1170 |
|
|
eac_next = ptr->next; |
1171 |
|
|
|
1172 |
|
|
if (target_p == NULL) |
1173 |
|
|
{ |
1174 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
1175 |
|
|
"Warning: null client on abort_list!"); |
1176 |
|
|
dlinkDelete(ptr, &abort_list); |
1177 |
|
|
free_dlink_node(ptr); |
1178 |
|
|
continue; |
1179 |
|
|
} |
1180 |
|
|
|
1181 |
|
|
dlinkDelete(ptr, &abort_list); |
1182 |
|
|
|
1183 |
|
|
if (IsSendQExceeded(target_p)) |
1184 |
|
|
notice = "Max SendQ exceeded"; |
1185 |
|
|
else |
1186 |
|
|
notice = "Write error: connection closed"; |
1187 |
|
|
|
1188 |
|
|
exit_client(target_p, &me, notice); |
1189 |
|
|
free_dlink_node(ptr); |
1190 |
|
|
} |
1191 |
|
|
} |
1192 |
|
|
|
1193 |
|
|
/* |
1194 |
|
|
* accept processing, this adds a form of "caller ID" to ircd |
1195 |
|
|
* |
1196 |
|
|
* If a client puts themselves into "caller ID only" mode, |
1197 |
|
|
* only clients that match a client pointer they have put on |
1198 |
|
|
* the accept list will be allowed to message them. |
1199 |
|
|
* |
1200 |
|
|
* [ source.on_allow_list ] -> [ target1 ] -> [ target2 ] |
1201 |
|
|
* |
1202 |
|
|
* [target.allow_list] -> [ source1 ] -> [source2 ] |
1203 |
|
|
* |
1204 |
|
|
* i.e. a target will have a link list of source pointers it will allow |
1205 |
|
|
* each source client then has a back pointer pointing back |
1206 |
|
|
* to the client that has it on its accept list. |
1207 |
|
|
* This allows for exit_one_client to remove these now bogus entries |
1208 |
|
|
* from any client having an accept on them. |
1209 |
|
|
*/ |
1210 |
|
|
|
1211 |
|
|
/* accept_message() |
1212 |
|
|
* |
1213 |
|
|
* inputs - pointer to source client |
1214 |
|
|
* - pointer to target client |
1215 |
|
|
* output - 1 if accept this message 0 if not |
1216 |
|
|
* side effects - See if source is on target's allow list |
1217 |
|
|
*/ |
1218 |
|
|
int |
1219 |
|
|
accept_message(struct Client *source, struct Client *target) |
1220 |
|
|
{ |
1221 |
|
|
dlink_node *ptr; |
1222 |
|
|
|
1223 |
|
|
DLINK_FOREACH(ptr, target->allow_list.head) |
1224 |
|
|
{ |
1225 |
|
|
struct Client *target_p = ptr->data; |
1226 |
|
|
|
1227 |
|
|
if (source == target_p) |
1228 |
|
|
return (1); |
1229 |
|
|
} |
1230 |
|
|
|
1231 |
|
|
if (IsSoftCallerId(target)) |
1232 |
|
|
{ |
1233 |
|
|
DLINK_FOREACH(ptr, target->channel.head) |
1234 |
|
|
if (IsMember(source, ptr->data)) |
1235 |
|
|
return (1); |
1236 |
|
|
} |
1237 |
|
|
|
1238 |
|
|
return (0); |
1239 |
|
|
} |
1240 |
|
|
|
1241 |
|
|
/* del_from_accept() |
1242 |
|
|
* |
1243 |
|
|
* inputs - pointer to source client |
1244 |
|
|
* - pointer to target client |
1245 |
|
|
* output - NONE |
1246 |
|
|
* side effects - Delete's source pointer to targets allow list |
1247 |
|
|
* |
1248 |
|
|
* Walk through the target's accept list, remove if source is found, |
1249 |
|
|
* Then walk through the source's on_accept_list remove target if found. |
1250 |
|
|
*/ |
1251 |
|
|
void |
1252 |
|
|
del_from_accept(struct Client *source, struct Client *target) |
1253 |
|
|
{ |
1254 |
|
|
dlink_node *ptr; |
1255 |
|
|
dlink_node *ptr2; |
1256 |
|
|
dlink_node *next_ptr; |
1257 |
|
|
dlink_node *next_ptr2; |
1258 |
|
|
struct Client *target_p; |
1259 |
|
|
|
1260 |
|
|
DLINK_FOREACH_SAFE(ptr, next_ptr, target->allow_list.head) |
1261 |
|
|
{ |
1262 |
|
|
target_p = ptr->data; |
1263 |
|
|
|
1264 |
|
|
if (source == target_p) |
1265 |
|
|
{ |
1266 |
|
|
dlinkDelete(ptr, &target->allow_list); |
1267 |
|
|
free_dlink_node(ptr); |
1268 |
|
|
|
1269 |
|
|
DLINK_FOREACH_SAFE(ptr2, next_ptr2, source->on_allow_list.head) |
1270 |
|
|
{ |
1271 |
|
|
target_p = ptr2->data; |
1272 |
|
|
|
1273 |
|
|
if (target == target_p) |
1274 |
|
|
{ |
1275 |
|
|
dlinkDelete(ptr2, &source->on_allow_list); |
1276 |
|
|
free_dlink_node(ptr2); |
1277 |
|
|
} |
1278 |
|
|
} |
1279 |
|
|
} |
1280 |
|
|
} |
1281 |
|
|
} |
1282 |
|
|
|
1283 |
|
|
/* del_all_accepts() |
1284 |
|
|
* |
1285 |
|
|
* inputs - pointer to exiting client |
1286 |
|
|
* output - NONE |
1287 |
|
|
* side effects - Walk through given clients allow_list and on_allow_list |
1288 |
|
|
* remove all references to this client |
1289 |
|
|
*/ |
1290 |
|
|
void |
1291 |
|
|
del_all_accepts(struct Client *client_p) |
1292 |
|
|
{ |
1293 |
|
|
dlink_node *ptr, *next_ptr; |
1294 |
|
|
|
1295 |
|
|
DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->allow_list.head) |
1296 |
|
|
del_from_accept(ptr->data, client_p); |
1297 |
|
|
|
1298 |
|
|
DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->on_allow_list.head) |
1299 |
|
|
del_from_accept(client_p, ptr->data); |
1300 |
|
|
} |
1301 |
|
|
|
1302 |
|
|
/* del_all_their_accepts() |
1303 |
|
|
* |
1304 |
|
|
* inputs - pointer to exiting client |
1305 |
|
|
* output - NONE |
1306 |
|
|
* side effects - Walk through given clients on_allow_list |
1307 |
|
|
* remove all references to this client, |
1308 |
|
|
* allow this client to keep their own allow_list |
1309 |
|
|
*/ |
1310 |
|
|
void |
1311 |
|
|
del_all_their_accepts(struct Client *client_p) |
1312 |
|
|
{ |
1313 |
|
|
dlink_node *ptr, *next_ptr; |
1314 |
|
|
|
1315 |
|
|
DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->on_allow_list.head) |
1316 |
|
|
del_from_accept(client_p, ptr->data); |
1317 |
|
|
} |
1318 |
|
|
|
1319 |
|
|
/* set_initial_nick() |
1320 |
|
|
* |
1321 |
|
|
* inputs |
1322 |
|
|
* output |
1323 |
|
|
* side effects - |
1324 |
|
|
* |
1325 |
|
|
* This function is only called to set up an initially registering |
1326 |
|
|
* client. |
1327 |
|
|
*/ |
1328 |
|
|
void |
1329 |
|
|
set_initial_nick(struct Client *client_p, struct Client *source_p, |
1330 |
|
|
const char *nick) |
1331 |
|
|
{ |
1332 |
|
|
char buf[USERLEN + 1]; |
1333 |
|
|
|
1334 |
|
|
/* Client setting NICK the first time */ |
1335 |
|
|
|
1336 |
|
|
/* This had to be copied here to avoid problems.. */ |
1337 |
|
|
source_p->tsinfo = CurrentTime; |
1338 |
|
|
|
1339 |
|
|
if (source_p->name[0]) |
1340 |
|
|
hash_del_client(source_p); |
1341 |
|
|
|
1342 |
|
|
strlcpy(source_p->name, nick, sizeof(source_p->name)); |
1343 |
|
|
hash_add_client(source_p); |
1344 |
|
|
|
1345 |
|
|
/* fd_desc is long enough */ |
1346 |
|
|
fd_note(&client_p->localClient->fd, "Nick: %s", nick); |
1347 |
|
|
|
1348 |
|
|
/* They have the nick they want now.. */ |
1349 |
|
|
client_p->llname[0] = '\0'; |
1350 |
|
|
|
1351 |
|
|
if (source_p->flags & FLAGS_GOTUSER) |
1352 |
|
|
{ |
1353 |
|
|
strlcpy(buf, source_p->username, sizeof(buf)); |
1354 |
|
|
|
1355 |
|
|
/* |
1356 |
|
|
* USER already received, now we have NICK. |
1357 |
|
|
* *NOTE* For servers "NICK" *must* precede the |
1358 |
|
|
* user message (giving USER before NICK is possible |
1359 |
|
|
* only for local client connection!). register_user |
1360 |
|
|
* may reject the client and call exit_client for it |
1361 |
|
|
* --must test this and exit m_nick too!!! |
1362 |
|
|
*/ |
1363 |
|
|
register_local_user(client_p, source_p, nick, buf); |
1364 |
|
|
} |
1365 |
|
|
} |
1366 |
|
|
|
1367 |
|
|
/* change_local_nick() |
1368 |
|
|
* |
1369 |
|
|
* inputs - pointer to server |
1370 |
|
|
* - pointer to client |
1371 |
|
|
* - nick |
1372 |
|
|
* output - |
1373 |
|
|
* side effects - changes nick of a LOCAL user |
1374 |
|
|
*/ |
1375 |
|
|
void |
1376 |
|
|
change_local_nick(struct Client *client_p, struct Client *source_p, const char *nick) |
1377 |
|
|
{ |
1378 |
|
|
/* |
1379 |
|
|
** Client just changing his/her nick. If he/she is |
1380 |
|
|
** on a channel, send note of change to all clients |
1381 |
|
|
** on that channel. Propagate notice to other servers. |
1382 |
|
|
*/ |
1383 |
|
|
if ((source_p->localClient->last_nick_change + |
1384 |
|
|
ConfigFileEntry.max_nick_time) < CurrentTime) |
1385 |
|
|
source_p->localClient->number_of_nick_changes = 0; |
1386 |
|
|
source_p->localClient->last_nick_change = CurrentTime; |
1387 |
|
|
source_p->localClient->number_of_nick_changes++; |
1388 |
|
|
|
1389 |
|
|
if ((ConfigFileEntry.anti_nick_flood && |
1390 |
|
|
(source_p->localClient->number_of_nick_changes |
1391 |
|
|
<= ConfigFileEntry.max_nick_changes)) || |
1392 |
|
|
!ConfigFileEntry.anti_nick_flood || |
1393 |
|
|
(IsOper(source_p) && ConfigFileEntry.no_oper_flood)) |
1394 |
|
|
{ |
1395 |
|
|
if (irccmp(source_p->name, nick)) |
1396 |
|
|
source_p->tsinfo = CurrentTime; |
1397 |
|
|
|
1398 |
|
|
/* XXX - the format of this notice should eventually be changed |
1399 |
|
|
* to either %s[%s@%s], or even better would be get_client_name() -bill |
1400 |
|
|
*/ |
1401 |
|
|
sendto_realops_flags(UMODE_NCHANGE, L_ALL, "Nick change: From %s to %s [%s@%s]", |
1402 |
|
|
source_p->name, nick, source_p->username, source_p->host); |
1403 |
|
|
sendto_common_channels_local(source_p, 1, ":%s!%s@%s NICK :%s", |
1404 |
|
|
source_p->name, source_p->username, |
1405 |
|
|
source_p->host, nick); |
1406 |
|
|
|
1407 |
|
|
add_history(source_p, 1); |
1408 |
|
|
|
1409 |
|
|
/* Only hubs care about lazy link nicks not being sent on yet |
1410 |
|
|
* lazylink leafs/leafs always send their nicks up to hub, |
1411 |
|
|
* hence must always propagate nick changes. |
1412 |
|
|
* hubs might not propagate a nick change, if the leaf |
1413 |
|
|
* does not know about that client yet. |
1414 |
|
|
*/ |
1415 |
|
|
sendto_server(client_p, source_p, NULL, CAP_TS6, NOCAPS, NOFLAGS, |
1416 |
|
|
":%s NICK %s :%lu", |
1417 |
|
|
ID(source_p), nick, (unsigned long)source_p->tsinfo); |
1418 |
|
|
sendto_server(client_p, source_p, NULL, NOCAPS, CAP_TS6, NOFLAGS, |
1419 |
|
|
":%s NICK %s :%lu", |
1420 |
|
|
source_p->name, nick, (unsigned long)source_p->tsinfo); |
1421 |
|
|
} |
1422 |
|
|
else |
1423 |
|
|
{ |
1424 |
|
|
sendto_one(source_p, form_str(ERR_NICKTOOFAST), |
1425 |
|
|
me.name, source_p->name, source_p->name, |
1426 |
|
|
nick, ConfigFileEntry.max_nick_time); |
1427 |
|
|
return; |
1428 |
|
|
} |
1429 |
|
|
|
1430 |
|
|
/* Finally, add to hash */ |
1431 |
|
|
if (source_p->name[0]) |
1432 |
|
|
hash_del_client(source_p); |
1433 |
|
|
|
1434 |
|
|
strcpy(source_p->name, nick); |
1435 |
|
|
hash_add_client(source_p); |
1436 |
|
|
|
1437 |
|
|
/* Make sure everyone that has this client on its accept list |
1438 |
|
|
* loses that reference. |
1439 |
|
|
*/ |
1440 |
|
|
del_all_their_accepts(source_p); |
1441 |
|
|
|
1442 |
|
|
/* fd_desc is long enough */ |
1443 |
|
|
fd_note(&client_p->localClient->fd, "Nick: %s", nick); |
1444 |
|
|
} |