1 |
/* |
2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
3 |
* |
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* Copyright (c) 1997-2019 ircd-hybrid development team |
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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* USA |
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*/ |
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|
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/*! \file client.c |
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* \brief Controls clients. |
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* \version $Id$ |
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*/ |
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|
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#include "stdinc.h" |
28 |
#include "list.h" |
29 |
#include "client.h" |
30 |
#include "client_svstag.h" |
31 |
#include "event.h" |
32 |
#include "hash.h" |
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#include "irc_string.h" |
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#include "ircd.h" |
35 |
#include "numeric.h" |
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#include "auth.h" |
37 |
#include "s_bsd.h" |
38 |
#include "conf.h" |
39 |
#include "conf_gecos.h" |
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#include "log.h" |
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#include "misc.h" |
42 |
#include "server.h" |
43 |
#include "send.h" |
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#include "whowas.h" |
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#include "user.h" |
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#include "memory.h" |
47 |
#include "hostmask.h" |
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#include "listener.h" |
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#include "watch.h" |
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#include "rng_mt.h" |
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#include "parse.h" |
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#include "ipcache.h" |
53 |
|
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|
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dlink_list listing_client_list; |
56 |
dlink_list unknown_list; |
57 |
dlink_list local_client_list; |
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dlink_list local_server_list; |
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dlink_list global_client_list; |
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dlink_list global_server_list; |
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dlink_list oper_list; |
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|
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static dlink_list dead_list, abort_list; |
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static dlink_node *eac_next; /* next aborted client to exit */ |
65 |
|
66 |
|
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/* |
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* client_make - 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 |
74 |
* 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 |
77 |
* |
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* from, create remote client (behind a socket |
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* associated with the client defined by |
80 |
* 'from'). ('from' is a local client!!). |
81 |
*/ |
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struct Client * |
83 |
client_make(struct Client *from) |
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{ |
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struct Client *client_p = xcalloc(sizeof(*client_p)); |
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|
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if (from) |
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client_p->from = from; |
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else |
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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->connection = xcalloc(sizeof(*client_p->connection)); |
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client_p->connection->since = CurrentTime; |
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client_p->connection->lasttime = CurrentTime; |
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client_p->connection->firsttime = CurrentTime; |
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client_p->connection->registration = REG_INIT; |
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|
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/* as good a place as any... */ |
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dlinkAdd(client_p, &client_p->connection->lclient_node, &unknown_list); |
100 |
} |
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|
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client_p->idhnext = client_p; |
103 |
client_p->hnext = client_p; |
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SetUnknown(client_p); |
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strcpy(client_p->username, "unknown"); |
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strcpy(client_p->account, "*"); |
107 |
|
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return client_p; |
109 |
} |
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|
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/* |
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* client_free |
113 |
* |
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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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*/ |
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static void |
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client_free(struct Client *client_p) |
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{ |
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assert(!IsMe(client_p)); |
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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->idhnext == client_p); |
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|
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assert(client_p->node.prev == NULL); |
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assert(client_p->node.next == NULL); |
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|
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assert(client_p->lnode.prev == NULL); |
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assert(client_p->lnode.next == NULL); |
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|
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assert(dlink_list_length(&client_p->whowas_list) == 0); |
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assert(client_p->whowas_list.head == NULL); |
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assert(client_p->whowas_list.tail == NULL); |
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|
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assert(dlink_list_length(&client_p->channel) == 0); |
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assert(client_p->channel.head == NULL); |
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assert(client_p->channel.tail == NULL); |
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|
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assert(dlink_list_length(&client_p->svstags) == 0); |
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assert(client_p->svstags.head == NULL); |
142 |
assert(client_p->svstags.tail == NULL); |
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|
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|
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xfree(client_p->serv); |
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xfree(client_p->certfp); |
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|
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if (MyConnect(client_p)) |
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{ |
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assert(client_p->connection->lclient_node.prev == NULL); |
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assert(client_p->connection->lclient_node.next == NULL); |
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|
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assert(client_p->connection->list_task == NULL); |
154 |
assert(client_p->connection->auth == NULL); |
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|
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assert(dlink_list_length(&client_p->connection->acceptlist) == 0); |
157 |
assert(client_p->connection->acceptlist.head == NULL); |
158 |
assert(client_p->connection->acceptlist.tail == NULL); |
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|
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|
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assert(dlink_list_length(&client_p->connection->watches) == 0); |
162 |
assert(client_p->connection->watches.head == NULL); |
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assert(client_p->connection->watches.tail == NULL); |
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|
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assert(dlink_list_length(&client_p->connection->confs) == 0); |
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assert(client_p->connection->confs.head == NULL); |
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assert(client_p->connection->confs.tail == NULL); |
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|
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assert(dlink_list_length(&client_p->connection->invited) == 0); |
170 |
assert(client_p->connection->invited.head == NULL); |
171 |
assert(client_p->connection->invited.tail == NULL); |
172 |
|
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assert(client_p->connection->fd == NULL); |
174 |
|
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assert(HasFlag(client_p, FLAGS_CLOSING) && IsDead(client_p)); |
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|
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/* |
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* Clean up extra sockets from listen {} blocks which have been discarded. |
179 |
*/ |
180 |
if (client_p->connection->listener) |
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{ |
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listener_release(client_p->connection->listener); |
183 |
client_p->connection->listener = NULL; |
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} |
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|
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dbuf_clear(&client_p->connection->buf_recvq); |
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dbuf_clear(&client_p->connection->buf_sendq); |
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|
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xfree(client_p->connection); |
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client_p->connection = NULL; |
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} |
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|
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xfree(client_p); |
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} |
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|
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/* check_pings_list() |
197 |
* |
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* inputs - pointer to list to check |
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* output - NONE |
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* side effects - |
201 |
*/ |
202 |
static void |
203 |
check_pings_list(dlink_list *list) |
204 |
{ |
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char buf[32] = ""; /* 32 = sizeof("Ping timeout: 999999999 seconds") */ |
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dlink_node *node, *node_next; |
207 |
|
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DLINK_FOREACH_SAFE(node, node_next, list->head) |
209 |
{ |
210 |
struct Client *client_p = node->data; |
211 |
assert(IsClient(client_p) || IsServer(client_p)); |
212 |
|
213 |
if (IsDead(client_p)) |
214 |
continue; /* Ignore it, it's been exited already */ |
215 |
|
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unsigned int ping = get_client_ping(&client_p->connection->confs); |
217 |
if (ping < CurrentTime - client_p->connection->lasttime) |
218 |
{ |
219 |
if (!HasFlag(client_p, FLAGS_PINGSENT)) |
220 |
{ |
221 |
/* |
222 |
* If we haven't PINGed the connection and we haven't |
223 |
* heard from it in a while, PING it to make sure |
224 |
* it is still alive. |
225 |
*/ |
226 |
AddFlag(client_p, FLAGS_PINGSENT); |
227 |
client_p->connection->lasttime = CurrentTime - ping; |
228 |
sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p)); |
229 |
} |
230 |
else |
231 |
{ |
232 |
if (CurrentTime - client_p->connection->lasttime >= 2 * ping) |
233 |
{ |
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/* |
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* If the client/server hasn't talked to us in 2*ping seconds |
236 |
* and it has a ping time, then close its connection. |
237 |
*/ |
238 |
if (IsServer(client_p)) |
239 |
{ |
240 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE, |
241 |
"No response from %s, closing link", |
242 |
client_get_name(client_p, SHOW_IP)); |
243 |
sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE, |
244 |
"No response from %s, closing link", |
245 |
client_get_name(client_p, MASK_IP)); |
246 |
ilog(LOG_TYPE_IRCD, "No response from %s, closing link", |
247 |
client_get_name(client_p, SHOW_IP)); |
248 |
} |
249 |
|
250 |
snprintf(buf, sizeof(buf), "Ping timeout: %ji seconds", |
251 |
(CurrentTime - client_p->connection->lasttime)); |
252 |
exit_client(client_p, buf); |
253 |
} |
254 |
} |
255 |
} |
256 |
} |
257 |
} |
258 |
|
259 |
/* check_unknowns_list() |
260 |
* |
261 |
* inputs - pointer to list of unknown clients |
262 |
* output - NONE |
263 |
* side effects - unknown clients get marked for termination after n seconds |
264 |
*/ |
265 |
static void |
266 |
check_unknowns_list(void) |
267 |
{ |
268 |
dlink_node *node, *node_next; |
269 |
|
270 |
DLINK_FOREACH_SAFE(node, node_next, unknown_list.head) |
271 |
{ |
272 |
struct Client *client_p = node->data; |
273 |
bool exit = false; |
274 |
|
275 |
/* |
276 |
* Check UNKNOWN connections - if they have been in this state |
277 |
* for > 30s, close them. |
278 |
*/ |
279 |
if ((CurrentTime - client_p->connection->firsttime) <= 30) |
280 |
continue; |
281 |
|
282 |
if (IsHandshake(client_p)) |
283 |
{ |
284 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE, |
285 |
"No response from %s during handshake, closing link", |
286 |
client_get_name(client_p, SHOW_IP)); |
287 |
sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE, |
288 |
"No response from %s during handshake, closing link", |
289 |
client_get_name(client_p, MASK_IP)); |
290 |
ilog(LOG_TYPE_IRCD, "No response from %s during handshake, closing link", |
291 |
client_get_name(client_p, SHOW_IP)); |
292 |
exit = true; |
293 |
} |
294 |
else if (HasFlag(client_p, FLAGS_FINISHED_AUTH)) |
295 |
exit = true; |
296 |
|
297 |
if (exit == true) |
298 |
exit_client(client_p, "Registration timed out"); |
299 |
} |
300 |
} |
301 |
|
302 |
/* |
303 |
* check_pings - go through the local client list and check activity |
304 |
* kill off stuff that should die |
305 |
* |
306 |
* inputs - NOT USED (from event) |
307 |
* side effects - |
308 |
* |
309 |
* |
310 |
* A PING can be sent to clients as necessary. |
311 |
* |
312 |
* Client/Server ping outs are handled. |
313 |
*/ |
314 |
|
315 |
/* |
316 |
* Addon from adrian. We used to call this after nextping seconds, |
317 |
* however I've changed it to run once a second. This is only for |
318 |
* PING timeouts, not K/etc-line checks (thanks dianora!). Having it |
319 |
* run once a second makes life a lot easier - when a new client connects |
320 |
* and they need a ping in 4 seconds, if nextping was set to 20 seconds |
321 |
* we end up waiting 20 seconds. This is stupid. :-) |
322 |
* I will optimise (hah!) check_pings() once I've finished working on |
323 |
* tidying up other network IO evilnesses. |
324 |
* -- adrian |
325 |
*/ |
326 |
|
327 |
static void |
328 |
check_pings(void *unused) |
329 |
{ |
330 |
check_pings_list(&local_client_list); |
331 |
check_pings_list(&local_server_list); |
332 |
check_unknowns_list(); |
333 |
} |
334 |
|
335 |
/* check_conf_klines() |
336 |
* |
337 |
* inputs - NONE |
338 |
* output - NONE |
339 |
* side effects - Check all connections for a pending kline against the |
340 |
* client, exit the client if a kline matches. |
341 |
*/ |
342 |
void |
343 |
check_conf_klines(void) |
344 |
{ |
345 |
dlink_node *node = NULL, *node_next = NULL; |
346 |
const void *ptr; |
347 |
|
348 |
DLINK_FOREACH_SAFE(node, node_next, local_client_list.head) |
349 |
{ |
350 |
struct Client *client_p = node->data; |
351 |
|
352 |
/* If a client is already being exited */ |
353 |
if (IsDead(client_p)) |
354 |
continue; |
355 |
|
356 |
if ((ptr = find_conf_by_address(NULL, &client_p->ip, CONF_DLINE, NULL, NULL, 1))) |
357 |
{ |
358 |
const struct MaskItem *conf = ptr; |
359 |
conf_try_ban(client_p, CLIENT_BAN_DLINE, conf->reason); |
360 |
continue; /* and go examine next Client */ |
361 |
} |
362 |
|
363 |
if ((ptr = find_conf_by_address(client_p->host, &client_p->ip, CONF_KLINE, |
364 |
client_p->username, NULL, 1))) |
365 |
{ |
366 |
const struct MaskItem *conf = ptr; |
367 |
conf_try_ban(client_p, CLIENT_BAN_KLINE, conf->reason); |
368 |
continue; /* and go examine next Client */ |
369 |
} |
370 |
|
371 |
if ((ptr = gecos_find(client_p->info, match))) |
372 |
{ |
373 |
const struct GecosItem *conf = ptr; |
374 |
conf_try_ban(client_p, CLIENT_BAN_XLINE, conf->reason); |
375 |
continue; /* and go examine next Client */ |
376 |
} |
377 |
} |
378 |
|
379 |
/* Also check the unknowns list for new dlines */ |
380 |
DLINK_FOREACH_SAFE(node, node_next, unknown_list.head) |
381 |
{ |
382 |
struct Client *client_p = node->data; |
383 |
|
384 |
if ((ptr = find_conf_by_address(NULL, &client_p->ip, CONF_DLINE, NULL, NULL, 1))) |
385 |
{ |
386 |
const struct MaskItem *conf = ptr; |
387 |
conf_try_ban(client_p, CLIENT_BAN_DLINE, conf->reason); |
388 |
continue; /* and go examine next Client */ |
389 |
} |
390 |
} |
391 |
} |
392 |
|
393 |
/* |
394 |
* conf_try_ban |
395 |
* |
396 |
* inputs - pointer to client to ban |
397 |
* - pointer to MaskItem |
398 |
* output - NONE |
399 |
* side effects - given client_p is banned |
400 |
*/ |
401 |
void |
402 |
conf_try_ban(struct Client *client_p, int type, const char *reason) |
403 |
{ |
404 |
char ban_type = '?'; |
405 |
|
406 |
switch (type) |
407 |
{ |
408 |
case CLIENT_BAN_KLINE: |
409 |
if (HasFlag(client_p, FLAGS_EXEMPTKLINE)) |
410 |
{ |
411 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
412 |
"KLINE over-ruled for %s, client is kline_exempt", |
413 |
client_get_name(client_p, HIDE_IP)); |
414 |
return; |
415 |
} |
416 |
|
417 |
ban_type = 'K'; |
418 |
break; |
419 |
case CLIENT_BAN_DLINE: |
420 |
if (find_conf_by_address(NULL, &client_p->ip, CONF_EXEMPT, NULL, NULL, 1)) |
421 |
return; |
422 |
ban_type = 'D'; |
423 |
break; |
424 |
case CLIENT_BAN_XLINE: |
425 |
if (HasFlag(client_p, FLAGS_EXEMPTXLINE)) |
426 |
{ |
427 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
428 |
"XLINE over-ruled for %s, client is xline_exempt", |
429 |
client_get_name(client_p, HIDE_IP)); |
430 |
return; |
431 |
} |
432 |
|
433 |
ban_type = 'X'; |
434 |
break; |
435 |
default: |
436 |
assert(0); |
437 |
break; |
438 |
} |
439 |
|
440 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, "%c-line active for %s", |
441 |
ban_type, client_get_name(client_p, HIDE_IP)); |
442 |
|
443 |
if (IsClient(client_p)) |
444 |
sendto_one_numeric(client_p, &me, ERR_YOUREBANNEDCREEP, reason); |
445 |
|
446 |
exit_client(client_p, reason); |
447 |
} |
448 |
|
449 |
/* find_person() |
450 |
* |
451 |
* inputs - pointer to name |
452 |
* output - return client pointer |
453 |
* side effects - find person by (nick)name |
454 |
*/ |
455 |
struct Client * |
456 |
find_person(const struct Client *source_p, const char *name) |
457 |
{ |
458 |
struct Client *target_p = NULL; |
459 |
|
460 |
if (IsDigit(*name)) |
461 |
{ |
462 |
if (IsServer(source_p->from)) |
463 |
target_p = hash_find_id(name); |
464 |
} |
465 |
else |
466 |
target_p = hash_find_client(name); |
467 |
|
468 |
return (target_p && IsClient(target_p)) ? target_p : NULL; |
469 |
} |
470 |
|
471 |
/* |
472 |
* find_chasing - find the client structure for a nick name (name) |
473 |
* using history mechanism if necessary. If the client is not found, |
474 |
* an error message (NO SUCH NICK) is generated. |
475 |
*/ |
476 |
struct Client * |
477 |
find_chasing(struct Client *source_p, const char *name) |
478 |
{ |
479 |
struct Client *target_p = find_person(source_p, name); |
480 |
|
481 |
if (target_p) |
482 |
return target_p; |
483 |
|
484 |
if (IsDigit(*name)) |
485 |
return NULL; |
486 |
|
487 |
target_p = whowas_get_history(name, ConfigGeneral.kill_chase_time_limit); |
488 |
if (target_p == NULL) |
489 |
sendto_one_numeric(source_p, &me, ERR_NOSUCHNICK, name); |
490 |
|
491 |
return target_p; |
492 |
} |
493 |
|
494 |
/* |
495 |
* client_get_name - Return the name of the client |
496 |
* for various tracking and |
497 |
* admin purposes. The main purpose of this function is to |
498 |
* return the "socket host" name of the client, if that |
499 |
* differs from the advertised name (other than case). |
500 |
* But, this can be used to any client structure. |
501 |
* |
502 |
* NOTE 1: |
503 |
* Watch out the allocation of "buf", if either source_p->name |
504 |
* or source_p->sockhost gets changed into pointers instead of |
505 |
* directly allocated within the structure... |
506 |
* |
507 |
* NOTE 2: |
508 |
* Function return either a pointer to the structure (source_p) or |
509 |
* to internal buffer (buf). *NEVER* use the returned pointer |
510 |
* to modify what it points!!! |
511 |
*/ |
512 |
const char * |
513 |
client_get_name(const struct Client *client_p, enum addr_mask_type type) |
514 |
{ |
515 |
static char buf[HOSTLEN * 2 + USERLEN + 4]; /* +4 for [,@,],\0 */ |
516 |
|
517 |
if (!MyConnect(client_p)) |
518 |
return client_p->name; |
519 |
|
520 |
if (IsServer(client_p) || IsConnecting(client_p) || IsHandshake(client_p)) |
521 |
{ |
522 |
if (irccmp(client_p->name, client_p->host) == 0) |
523 |
return client_p->name; |
524 |
else if (ConfigServerHide.hide_server_ips) |
525 |
type = MASK_IP; |
526 |
} |
527 |
|
528 |
/* And finally, let's get the host information, ip or name */ |
529 |
switch (type) |
530 |
{ |
531 |
case SHOW_IP: |
532 |
snprintf(buf, sizeof(buf), "%s[%s@%s]", |
533 |
client_p->name, |
534 |
client_p->username, client_p->sockhost); |
535 |
break; |
536 |
case MASK_IP: |
537 |
if (client_p->ip.ss.ss_family == AF_INET) |
538 |
snprintf(buf, sizeof(buf), "%s[%s@255.255.255.255]", |
539 |
client_p->name, client_p->username); |
540 |
else |
541 |
snprintf(buf, sizeof(buf), "%s[%s@ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]", |
542 |
client_p->name, client_p->username); |
543 |
break; |
544 |
default: /* HIDE_IP */ |
545 |
snprintf(buf, sizeof(buf), "%s[%s@%s]", |
546 |
client_p->name, |
547 |
client_p->username, client_p->host); |
548 |
} |
549 |
|
550 |
return buf; |
551 |
} |
552 |
|
553 |
void |
554 |
free_exited_clients(void) |
555 |
{ |
556 |
dlink_node *node, *node_next; |
557 |
|
558 |
DLINK_FOREACH_SAFE(node, node_next, dead_list.head) |
559 |
{ |
560 |
client_free(node->data); |
561 |
dlinkDelete(node, &dead_list); |
562 |
free_dlink_node(node); |
563 |
} |
564 |
} |
565 |
|
566 |
/* |
567 |
* client_close_connection |
568 |
* Close the physical connection. This function must make |
569 |
* MyConnect(client_p) == FALSE, and set client_p->from == NULL. |
570 |
*/ |
571 |
static void |
572 |
client_close_connection(struct Client *client_p) |
573 |
{ |
574 |
assert(client_p); |
575 |
|
576 |
if (!IsDead(client_p)) |
577 |
{ |
578 |
/* Attempt to flush any pending dbufs. Evil, but .. -- adrian */ |
579 |
/* |
580 |
* There is still a chance that we might send data to this socket |
581 |
* even if it is marked as blocked (COMM_SELECT_READ handler is called |
582 |
* before COMM_SELECT_WRITE). Let's try, nothing to lose.. -adx |
583 |
*/ |
584 |
DelFlag(client_p, FLAGS_BLOCKED); |
585 |
send_queued_write(client_p); |
586 |
} |
587 |
|
588 |
if (IsClient(client_p)) |
589 |
{ |
590 |
++ServerStats.is_cl; |
591 |
ServerStats.is_cbs += client_p->connection->send.bytes; |
592 |
ServerStats.is_cbr += client_p->connection->recv.bytes; |
593 |
ServerStats.is_cti += CurrentTime - client_p->connection->firsttime; |
594 |
} |
595 |
else if (IsServer(client_p)) |
596 |
{ |
597 |
dlink_node *node; |
598 |
|
599 |
++ServerStats.is_sv; |
600 |
ServerStats.is_sbs += client_p->connection->send.bytes; |
601 |
ServerStats.is_sbr += client_p->connection->recv.bytes; |
602 |
ServerStats.is_sti += CurrentTime - client_p->connection->firsttime; |
603 |
|
604 |
DLINK_FOREACH(node, connect_items.head) |
605 |
{ |
606 |
struct MaskItem *conf = node->data; |
607 |
|
608 |
if (irccmp(conf->name, client_p->name)) |
609 |
continue; |
610 |
|
611 |
/* |
612 |
* Reset next-connect cycle of all connect{} blocks that match |
613 |
* this servername. |
614 |
*/ |
615 |
conf->until = CurrentTime + conf->class->con_freq; |
616 |
} |
617 |
} |
618 |
else |
619 |
++ServerStats.is_ni; |
620 |
|
621 |
if (tls_isusing(&client_p->connection->fd->ssl)) |
622 |
tls_shutdown(&client_p->connection->fd->ssl); |
623 |
|
624 |
if (client_p->connection->fd) |
625 |
{ |
626 |
fd_close(client_p->connection->fd); |
627 |
client_p->connection->fd = NULL; |
628 |
} |
629 |
|
630 |
dbuf_clear(&client_p->connection->buf_sendq); |
631 |
dbuf_clear(&client_p->connection->buf_recvq); |
632 |
|
633 |
xfree(client_p->connection->password); |
634 |
client_p->connection->password = NULL; |
635 |
|
636 |
conf_detach(client_p, CONF_CLIENT | CONF_OPER | CONF_SERVER); |
637 |
} |
638 |
|
639 |
/* |
640 |
* Exit one client, local or remote. Assuming all dependents have |
641 |
* been already removed, and socket closed for local client. |
642 |
* |
643 |
* The only messages generated are QUITs on channels. |
644 |
*/ |
645 |
static void |
646 |
exit_one_client(struct Client *source_p, const char *comment) |
647 |
{ |
648 |
dlink_node *node, *node_next; |
649 |
|
650 |
assert(!IsMe(source_p)); |
651 |
assert(source_p != &me); |
652 |
|
653 |
if (IsClient(source_p)) |
654 |
{ |
655 |
if (HasUMode(source_p, UMODE_OPER)) |
656 |
--Count.oper; |
657 |
if (HasUMode(source_p, UMODE_INVISIBLE)) |
658 |
--Count.invisi; |
659 |
|
660 |
dlinkDelete(&source_p->lnode, &source_p->servptr->serv->client_list); |
661 |
dlinkDelete(&source_p->node, &global_client_list); |
662 |
|
663 |
/* |
664 |
* If a person is on a channel, send a QUIT notice |
665 |
* to every client (person) on the same channel (so |
666 |
* that the client can show the "**signoff" message). |
667 |
* (Note: The notice is to the local clients *only*) |
668 |
*/ |
669 |
sendto_common_channels_local(source_p, false, 0, 0, ":%s!%s@%s QUIT :%s", |
670 |
source_p->name, source_p->username, |
671 |
source_p->host, comment); |
672 |
|
673 |
DLINK_FOREACH_SAFE(node, node_next, source_p->channel.head) |
674 |
remove_user_from_channel(node->data); |
675 |
|
676 |
svstag_clear_list(&source_p->svstags); |
677 |
|
678 |
whowas_add_history(source_p, false); |
679 |
whowas_off_history(source_p); |
680 |
|
681 |
watch_check_hash(source_p, RPL_LOGOFF); |
682 |
} |
683 |
else if (IsServer(source_p)) |
684 |
{ |
685 |
sendto_realops_flags(UMODE_EXTERNAL, L_ALL, SEND_NOTICE, |
686 |
"Server %s split from %s", |
687 |
source_p->name, source_p->servptr->name); |
688 |
|
689 |
dlinkDelete(&source_p->lnode, &source_p->servptr->serv->server_list); |
690 |
dlinkDelete(&source_p->node, &global_server_list); |
691 |
} |
692 |
|
693 |
/* Remove source_p from the client lists */ |
694 |
if (source_p->id[0]) |
695 |
hash_del_id(source_p); |
696 |
|
697 |
if (source_p->name[0]) |
698 |
hash_del_client(source_p); |
699 |
|
700 |
if (HasFlag(source_p, FLAGS_IPHASH)) |
701 |
{ |
702 |
DelFlag(source_p, FLAGS_IPHASH); |
703 |
ipcache_record_remove(&source_p->ip, MyConnect(source_p)); |
704 |
} |
705 |
|
706 |
/* Check to see if the client isn't already on the dead list */ |
707 |
assert(dlinkFind(&dead_list, source_p) == NULL); |
708 |
|
709 |
/* Add to dead client dlist */ |
710 |
SetDead(source_p); |
711 |
dlinkAdd(source_p, make_dlink_node(), &dead_list); |
712 |
} |
713 |
|
714 |
/* |
715 |
* Remove all clients that depend on source_p; assumes all (S)QUITs have |
716 |
* already been sent. we make sure to exit a server's dependent clients |
717 |
* and servers before the server itself; exit_one_client takes care of |
718 |
* actually removing things off llists. tweaked from +CSr31 -orabidoo |
719 |
*/ |
720 |
static void |
721 |
recurse_remove_clients(struct Client *source_p, const char *comment) |
722 |
{ |
723 |
dlink_node *node, *node_next; |
724 |
|
725 |
DLINK_FOREACH_SAFE(node, node_next, source_p->serv->client_list.head) |
726 |
exit_one_client(node->data, comment); |
727 |
|
728 |
DLINK_FOREACH_SAFE(node, node_next, source_p->serv->server_list.head) |
729 |
{ |
730 |
recurse_remove_clients(node->data, comment); |
731 |
exit_one_client(node->data, comment); |
732 |
} |
733 |
} |
734 |
|
735 |
/* |
736 |
* exit_client - exit a client of any type. Generally, you can use |
737 |
* this on any struct Client, regardless of its state. |
738 |
* |
739 |
* Note, you shouldn't exit remote _users_ without first doing |
740 |
* AddFlag(x, FLAGS_KILLED) and propagating a kill or similar message. |
741 |
* |
742 |
* However, it is perfectly correct to call exit_client to force a _server_ |
743 |
* quit (either local or remote one). |
744 |
* |
745 |
* |
746 |
* inputs: - a client pointer that is going to be exited |
747 |
* output: none |
748 |
* side effects: the client is delinked from all lists, disconnected, |
749 |
* and the rest of IRC network is notified of the exit. |
750 |
* Client memory is scheduled to be freed |
751 |
*/ |
752 |
void |
753 |
exit_client(struct Client *source_p, const char *comment) |
754 |
{ |
755 |
assert(!IsMe(source_p)); |
756 |
assert(source_p != &me); |
757 |
|
758 |
if (MyConnect(source_p)) |
759 |
{ |
760 |
assert(source_p == source_p->from); |
761 |
|
762 |
/* |
763 |
* DO NOT REMOVE. exit_client can be called twice after a failed read/write. |
764 |
*/ |
765 |
if (HasFlag(source_p, FLAGS_CLOSING)) |
766 |
return; |
767 |
|
768 |
AddFlag(source_p, FLAGS_CLOSING); |
769 |
|
770 |
if (source_p->connection->auth) |
771 |
{ |
772 |
auth_delete(source_p->connection->auth); |
773 |
source_p->connection->auth = NULL; |
774 |
} |
775 |
|
776 |
if (IsClient(source_p)) |
777 |
{ |
778 |
dlink_node *node; |
779 |
|
780 |
if (HasUMode(source_p, UMODE_OPER)) |
781 |
if ((node = dlinkFindDelete(&oper_list, source_p))) |
782 |
free_dlink_node(node); |
783 |
|
784 |
assert(dlinkFind(&local_client_list, source_p)); |
785 |
dlinkDelete(&source_p->connection->lclient_node, &local_client_list); |
786 |
|
787 |
if (source_p->connection->list_task) |
788 |
free_list_task(source_p); |
789 |
|
790 |
clear_invite_list(&source_p->connection->invited); |
791 |
del_all_accepts(source_p); |
792 |
watch_del_watch_list(source_p); |
793 |
|
794 |
sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE, |
795 |
"Client exiting: %s (%s@%s) [%s] [%s]", |
796 |
source_p->name, source_p->username, source_p->realhost, |
797 |
source_p->sockhost, comment); |
798 |
|
799 |
ilog(LOG_TYPE_USER, "%s (%ju): %s!%s@%s %s %s %ju/%ju :%s", |
800 |
date_ctime(source_p->connection->firsttime), |
801 |
CurrentTime - source_p->connection->firsttime, |
802 |
source_p->name, source_p->username, source_p->host, |
803 |
source_p->sockhost, source_p->account, |
804 |
source_p->connection->send.bytes >> 10, |
805 |
source_p->connection->recv.bytes >> 10, source_p->info); |
806 |
} |
807 |
else if (IsServer(source_p)) |
808 |
{ |
809 |
assert(dlinkFind(&local_server_list, source_p)); |
810 |
dlinkDelete(&source_p->connection->lclient_node, &local_server_list); |
811 |
|
812 |
if (!HasFlag(source_p, FLAGS_SQUIT)) |
813 |
/* For them, we are exiting the network */ |
814 |
sendto_one(source_p, ":%s SQUIT %s :%s", me.id, me.id, comment); |
815 |
} |
816 |
else |
817 |
{ |
818 |
assert(dlinkFind(&unknown_list, source_p)); |
819 |
dlinkDelete(&source_p->connection->lclient_node, &unknown_list); |
820 |
} |
821 |
|
822 |
sendto_one(source_p, "ERROR :Closing Link: %s (%s)", source_p->host, comment); |
823 |
|
824 |
client_close_connection(source_p); |
825 |
} |
826 |
else if (IsClient(source_p) && HasFlag(source_p->servptr, FLAGS_EOB)) |
827 |
sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE, |
828 |
"Client exiting at %s: %s (%s@%s) [%s] [%s]", |
829 |
source_p->servptr->name, source_p->name, |
830 |
source_p->username, source_p->realhost, source_p->sockhost, comment); |
831 |
|
832 |
if (IsServer(source_p)) |
833 |
{ |
834 |
char splitstr[HOSTLEN + HOSTLEN + 2] = ""; |
835 |
|
836 |
assert(source_p->serv); |
837 |
assert(source_p->servptr); |
838 |
|
839 |
if (ConfigServerHide.hide_servers) |
840 |
/* |
841 |
* Set netsplit message to "*.net *.split" to still show that it's a split, |
842 |
* but hide the servers splitting. |
843 |
*/ |
844 |
strlcpy(splitstr, "*.net *.split", sizeof(splitstr)); |
845 |
else |
846 |
snprintf(splitstr, sizeof(splitstr), "%s %s", |
847 |
source_p->servptr->name, source_p->name); |
848 |
|
849 |
/* Send SQUIT for source_p in every direction. source_p is already off of local_server_list here */ |
850 |
if (!HasFlag(source_p, FLAGS_SQUIT)) |
851 |
sendto_server(NULL, 0, 0, "SQUIT %s :%s", source_p->id, comment); |
852 |
|
853 |
/* Now exit the clients internally */ |
854 |
recurse_remove_clients(source_p, splitstr); |
855 |
|
856 |
if (MyConnect(source_p)) |
857 |
{ |
858 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
859 |
"%s was connected for %s. %ju/%ju sendK/recvK.", |
860 |
source_p->name, time_dissect(CurrentTime - source_p->connection->firsttime), |
861 |
source_p->connection->send.bytes >> 10, |
862 |
source_p->connection->recv.bytes >> 10); |
863 |
ilog(LOG_TYPE_IRCD, "%s was connected for %s. %ju/%ju sendK/recvK.", |
864 |
source_p->name, time_dissect(CurrentTime - source_p->connection->firsttime), |
865 |
source_p->connection->send.bytes >> 10, |
866 |
source_p->connection->recv.bytes >> 10); |
867 |
} |
868 |
} |
869 |
else if (IsClient(source_p) && !HasFlag(source_p, FLAGS_KILLED)) |
870 |
sendto_server(source_p->from, 0, 0, ":%s QUIT :%s", source_p->id, comment); |
871 |
|
872 |
/* The client *better* be off all of the lists */ |
873 |
assert(dlinkFind(&unknown_list, source_p) == NULL); |
874 |
assert(dlinkFind(&local_client_list, source_p) == NULL); |
875 |
assert(dlinkFind(&local_server_list, source_p) == NULL); |
876 |
assert(dlinkFind(&oper_list, source_p) == NULL); |
877 |
assert(dlinkFind(&listing_client_list, source_p) == NULL); |
878 |
|
879 |
exit_one_client(source_p, comment); |
880 |
} |
881 |
|
882 |
/* |
883 |
* dead_link_on_write - report a write error if not already dead, |
884 |
* mark it as dead then exit it |
885 |
*/ |
886 |
void |
887 |
dead_link_on_write(struct Client *client_p, int ierrno) |
888 |
{ |
889 |
dlink_node *node; |
890 |
|
891 |
if (IsDefunct(client_p)) |
892 |
return; |
893 |
|
894 |
dbuf_clear(&client_p->connection->buf_recvq); |
895 |
dbuf_clear(&client_p->connection->buf_sendq); |
896 |
|
897 |
assert(dlinkFind(&abort_list, client_p) == NULL); |
898 |
node = make_dlink_node(); |
899 |
/* don't let exit_aborted_clients() finish yet */ |
900 |
dlinkAddTail(client_p, node, &abort_list); |
901 |
|
902 |
if (eac_next == NULL) |
903 |
eac_next = node; |
904 |
|
905 |
SetDead(client_p); /* You are dead my friend */ |
906 |
} |
907 |
|
908 |
/* |
909 |
* dead_link_on_read - report a read error if not already dead, |
910 |
* mark it as dead then exit it |
911 |
*/ |
912 |
void |
913 |
dead_link_on_read(struct Client *client_p, int error) |
914 |
{ |
915 |
char errmsg[IRCD_BUFSIZE]; |
916 |
int current_error; |
917 |
|
918 |
if (IsDefunct(client_p)) |
919 |
return; |
920 |
|
921 |
dbuf_clear(&client_p->connection->buf_recvq); |
922 |
dbuf_clear(&client_p->connection->buf_sendq); |
923 |
|
924 |
current_error = comm_get_sockerr(client_p->connection->fd); |
925 |
|
926 |
if (IsServer(client_p) || IsHandshake(client_p)) |
927 |
{ |
928 |
if (error == 0) |
929 |
{ |
930 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE, |
931 |
"Server %s closed the connection", |
932 |
client_get_name(client_p, SHOW_IP)); |
933 |
sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE, |
934 |
"Server %s closed the connection", |
935 |
client_get_name(client_p, MASK_IP)); |
936 |
ilog(LOG_TYPE_IRCD, "Server %s closed the connection", |
937 |
client_get_name(client_p, SHOW_IP)); |
938 |
} |
939 |
else |
940 |
{ |
941 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE, |
942 |
"Lost connection to %s: %s", |
943 |
client_get_name(client_p, SHOW_IP), strerror(current_error)); |
944 |
sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE, |
945 |
"Lost connection to %s: %s", |
946 |
client_get_name(client_p, MASK_IP), strerror(current_error)); |
947 |
ilog(LOG_TYPE_IRCD, "Lost connection to %s: %s", |
948 |
client_get_name(client_p, SHOW_IP), strerror(current_error)); |
949 |
} |
950 |
|
951 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
952 |
"%s was connected for %s", |
953 |
client_p->name, time_dissect(CurrentTime - client_p->connection->firsttime)); |
954 |
} |
955 |
|
956 |
if (error == 0) |
957 |
strlcpy(errmsg, "Remote host closed the connection", |
958 |
sizeof(errmsg)); |
959 |
else |
960 |
snprintf(errmsg, sizeof(errmsg), "Read error: %s", |
961 |
strerror(current_error)); |
962 |
|
963 |
exit_client(client_p, errmsg); |
964 |
} |
965 |
|
966 |
void |
967 |
exit_aborted_clients(void) |
968 |
{ |
969 |
dlink_node *ptr; |
970 |
struct Client *target_p; |
971 |
const char *notice; |
972 |
|
973 |
DLINK_FOREACH_SAFE(ptr, eac_next, abort_list.head) |
974 |
{ |
975 |
target_p = ptr->data; |
976 |
eac_next = ptr->next; |
977 |
|
978 |
dlinkDelete(ptr, &abort_list); |
979 |
free_dlink_node(ptr); |
980 |
|
981 |
if (target_p == NULL) |
982 |
{ |
983 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
984 |
"Warning: null client on abort_list!"); |
985 |
continue; |
986 |
} |
987 |
|
988 |
if (HasFlag(target_p, FLAGS_SENDQEX)) |
989 |
notice = "Max SendQ exceeded"; |
990 |
else |
991 |
notice = "Write error: connection closed"; |
992 |
|
993 |
exit_client(target_p, notice); |
994 |
} |
995 |
} |
996 |
|
997 |
/* |
998 |
* accept processing, this adds a form of "caller ID" to ircd |
999 |
* |
1000 |
* If a client puts themselves into "caller ID only" mode, |
1001 |
* only clients that match a client pointer they have put on |
1002 |
* the accept list will be allowed to message them. |
1003 |
* |
1004 |
* Diane Bruce, "Dianora" db@db.net |
1005 |
*/ |
1006 |
|
1007 |
void |
1008 |
del_accept(struct split_nuh_item *accept_p, struct Client *client_p) |
1009 |
{ |
1010 |
dlinkDelete(&accept_p->node, &client_p->connection->acceptlist); |
1011 |
|
1012 |
xfree(accept_p->nickptr); |
1013 |
xfree(accept_p->userptr); |
1014 |
xfree(accept_p->hostptr); |
1015 |
xfree(accept_p); |
1016 |
} |
1017 |
|
1018 |
struct split_nuh_item * |
1019 |
find_accept(const char *nick, const char *user, |
1020 |
const char *host, struct Client *client_p, |
1021 |
int (*compare)(const char *, const char *)) |
1022 |
{ |
1023 |
dlink_node *node; |
1024 |
|
1025 |
DLINK_FOREACH(node, client_p->connection->acceptlist.head) |
1026 |
{ |
1027 |
struct split_nuh_item *accept_p = node->data; |
1028 |
|
1029 |
if (compare(accept_p->nickptr, nick) == 0 && |
1030 |
compare(accept_p->userptr, user) == 0 && |
1031 |
compare(accept_p->hostptr, host) == 0) |
1032 |
return accept_p; |
1033 |
} |
1034 |
|
1035 |
return NULL; |
1036 |
} |
1037 |
|
1038 |
/* accept_message() |
1039 |
* |
1040 |
* inputs - pointer to source client |
1041 |
* - pointer to target client |
1042 |
* output - 1 if accept this message 0 if not |
1043 |
* side effects - See if source is on target's allow list |
1044 |
*/ |
1045 |
bool |
1046 |
accept_message(struct Client *source, |
1047 |
struct Client *target) |
1048 |
{ |
1049 |
dlink_node *node; |
1050 |
|
1051 |
if (HasFlag(source, FLAGS_SERVICE) || |
1052 |
(HasUMode(source, UMODE_OPER) && ConfigGeneral.opers_bypass_callerid)) |
1053 |
return true; |
1054 |
|
1055 |
if (source == target || find_accept(source->name, source->username, |
1056 |
source->host, target, match)) |
1057 |
return true; |
1058 |
|
1059 |
if (!HasUMode(target, UMODE_CALLERID) && HasUMode(target, UMODE_SOFTCALLERID)) |
1060 |
DLINK_FOREACH(node, target->channel.head) |
1061 |
if (IsMember(source, ((struct Membership *)node->data)->chptr)) |
1062 |
return true; |
1063 |
|
1064 |
return false; |
1065 |
} |
1066 |
|
1067 |
/* del_all_accepts() |
1068 |
* |
1069 |
* inputs - pointer to exiting client |
1070 |
* output - NONE |
1071 |
* side effects - Walk through given clients acceptlist and remove all entries |
1072 |
*/ |
1073 |
void |
1074 |
del_all_accepts(struct Client *client_p) |
1075 |
{ |
1076 |
dlink_node *node, *node_next; |
1077 |
|
1078 |
DLINK_FOREACH_SAFE(node, node_next, client_p->connection->acceptlist.head) |
1079 |
del_accept(node->data, client_p); |
1080 |
} |
1081 |
|
1082 |
unsigned int |
1083 |
client_get_idle_time(const struct Client *source_p, |
1084 |
const struct Client *target_p) |
1085 |
{ |
1086 |
unsigned int idle = 0; |
1087 |
const struct ClassItem *const class = class_get_ptr(&target_p->connection->confs); |
1088 |
|
1089 |
if (!(class->flags & CLASS_FLAGS_FAKE_IDLE) || target_p == source_p) |
1090 |
return CurrentTime - target_p->connection->last_privmsg; |
1091 |
|
1092 |
if (HasUMode(source_p, UMODE_OPER) && |
1093 |
!(class->flags & CLASS_FLAGS_HIDE_IDLE_FROM_OPERS)) |
1094 |
return CurrentTime - target_p->connection->last_privmsg; |
1095 |
|
1096 |
const unsigned int min_idle = class->min_idle; |
1097 |
const unsigned int max_idle = class->max_idle; |
1098 |
|
1099 |
if (min_idle == max_idle) |
1100 |
return min_idle; |
1101 |
|
1102 |
if (class->flags & CLASS_FLAGS_RANDOM_IDLE) |
1103 |
idle = genrand_int32(); |
1104 |
else |
1105 |
idle = CurrentTime - target_p->connection->last_privmsg; |
1106 |
|
1107 |
if (max_idle) |
1108 |
idle %= max_idle; |
1109 |
else |
1110 |
idle = 0; |
1111 |
|
1112 |
if (idle < min_idle) |
1113 |
idle = min_idle + (idle % (max_idle - min_idle)); |
1114 |
|
1115 |
return idle; |
1116 |
} |
1117 |
|
1118 |
/* client_init() |
1119 |
* |
1120 |
* inputs - NONE |
1121 |
* output - NONE |
1122 |
* side effects - initialize client free memory |
1123 |
*/ |
1124 |
void |
1125 |
client_init(void) |
1126 |
{ |
1127 |
static struct event event_ping = |
1128 |
{ |
1129 |
.name = "check_pings", |
1130 |
.handler = check_pings, |
1131 |
.when = 5 |
1132 |
}; |
1133 |
|
1134 |
event_add(&event_ping, NULL); |
1135 |
} |