2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2014 Alexander Barton (alex@barton.de) and Contributors.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 * Please read the file COPYING, README and AUTHORS for more information.
16 * Handlers for IRC numerics sent to the server
25 #include "conn-func.h"
29 #include "irc-write.h"
37 * Announce a channel and its users in the network.
40 Announce_Channel(CLIENT *Client, CHANNEL *Chan)
44 char str[COMMAND_LEN], *ptr;
47 /* Check features of remote server */
48 njoin = Conn_Options(Client_Conn(Client)) & CONN_RFC1459 ? false : true;
49 xop = Client_HasFlag(Client, 'X') ? true : false;
51 /* Get all the members of this channel */
52 cl2chan = Channel_FirstMember(Chan);
53 snprintf(str, sizeof(str), "NJOIN %s :", Channel_Name(Chan));
55 cl = Channel_GetClient(cl2chan);
59 /* RFC 2813: send NJOIN with nicknames and modes
60 * (if user is channel operator or has voice) */
61 if (str[strlen(str) - 1] != ':')
62 strlcat(str, ",", sizeof(str));
64 /* Prepare user prefix (ChanOp, voiced, ...) */
65 if (xop && Channel_UserHasMode(Chan, cl, 'q'))
66 strlcat(str, "~", sizeof(str));
67 if (xop && Channel_UserHasMode(Chan, cl, 'a'))
68 strlcat(str, "&", sizeof(str));
69 if (Channel_UserHasMode(Chan, cl, 'o'))
70 strlcat(str, "@", sizeof(str));
71 if (xop && Channel_UserHasMode(Chan, cl, 'h'))
72 strlcat(str, "%", sizeof(str));
73 if (Channel_UserHasMode(Chan, cl, 'v'))
74 strlcat(str, "+", sizeof(str));
76 strlcat(str, Client_ID(cl), sizeof(str));
78 /* Send the data if the buffer is "full" */
79 if (strlen(str) > (sizeof(str) - CLIENT_NICK_LEN - 8)) {
80 if (!IRC_WriteStrClient(Client, "%s", str))
82 snprintf(str, sizeof(str), "NJOIN %s :",
86 /* RFC 1459: no NJOIN, send JOIN and MODE */
87 if (!IRC_WriteStrClientPrefix(Client, cl, "JOIN %s",
90 ptr = Channel_UserModes(Chan, cl);
92 if (!IRC_WriteStrClientPrefix(Client, cl,
94 Channel_Name(Chan), ptr[0],
101 cl2chan = Channel_NextMember(Chan, cl2chan);
104 /* Data left in the buffer? */
105 if (str[strlen(str) - 1] != ':') {
106 /* Yes, send it ... */
107 if (!IRC_WriteStrClient(Client, "%s", str))
112 } /* Announce_Channel */
115 * Announce new server in the network
116 * @param Client New server
117 * @param Server Existing server in the network
120 Announce_Server(CLIENT * Client, CLIENT * Server)
124 if (Client_Conn(Server) > NONE) {
125 /* Announce the new server to the one already registered
126 * which is directly connected to the local server */
127 if (!IRC_WriteStrClient
128 (Server, "SERVER %s %d %d :%s", Client_ID(Client),
129 Client_Hops(Client) + 1, Client_MyToken(Client),
130 Client_Info(Client)))
134 if (Client_Hops(Server) == 1)
135 c = Client_ThisServer();
137 c = Client_TopServer(Server);
139 /* Inform new server about the one already registered in the network */
140 return IRC_WriteStrClientPrefix(Client, c, "SERVER %s %d %d :%s",
141 Client_ID(Server), Client_Hops(Server) + 1,
142 Client_MyToken(Server), Client_Info(Server));
143 } /* Announce_Server */
148 * Synchronize invite, ban, G- and K-Line lists between servers.
150 * @param Client New server.
151 * @return CONNECTED or DISCONNECTED.
154 Synchronize_Lists(CLIENT * Client)
157 struct list_head *head;
158 struct list_elem *elem;
160 assert(Client != NULL);
163 head = Class_GetList(CLASS_GLINE);
164 elem = Lists_GetFirst(head);
166 if (!IRC_WriteStrClient(Client, "GLINE %s %ld :%s",
168 Lists_GetValidity(elem) - time(NULL),
169 Lists_GetReason(elem)))
171 elem = Lists_GetNext(elem);
177 head = Channel_GetListBans(c);
178 elem = Lists_GetFirst(head);
180 if (!IRC_WriteStrClient(Client, "MODE %s +b %s",
182 Lists_GetMask(elem))) {
185 elem = Lists_GetNext(elem);
189 head = Channel_GetListInvites(c);
190 elem = Lists_GetFirst(head);
192 if (!IRC_WriteStrClient(Client, "MODE %s +I %s",
194 Lists_GetMask(elem))) {
197 elem = Lists_GetNext(elem);
206 * Send CHANINFO commands to a new server (inform it about existing channels).
207 * @param Client New server
208 * @param Chan Channel
211 Send_CHANINFO(CLIENT * Client, CHANNEL * Chan)
217 Log(LOG_DEBUG, "Sending CHANINFO commands ...");
220 modes = Channel_Modes(Chan);
221 topic = Channel_Topic(Chan);
223 if (!*modes && !*topic)
226 has_k = Channel_HasMode(Chan, 'k');
227 has_l = Channel_HasMode(Chan, 'l');
230 if (!has_k && !has_l) {
232 /* "CHANINFO <chan> +<modes>" */
233 return IRC_WriteStrClient(Client, "CHANINFO %s +%s",
234 Channel_Name(Chan), modes);
236 /* "CHANINFO <chan> +<modes> :<topic>" */
237 return IRC_WriteStrClient(Client, "CHANINFO %s +%s :%s",
238 Channel_Name(Chan), modes, topic);
240 /* "CHANINFO <chan> +<modes> <key> <limit> :<topic>" */
241 return IRC_WriteStrClient(Client, "CHANINFO %s +%s %s %lu :%s",
242 Channel_Name(Chan), modes,
243 has_k ? Channel_Key(Chan) : "*",
244 has_l ? Channel_MaxUsers(Chan) : 0, topic);
245 } /* Send_CHANINFO */
250 * Handle ENDOFMOTD (376) numeric and login remote server.
251 * The peer is either an IRC server (no IRC+ protocol), or we got the
252 * ENDOFMOTD numeric from an IRC+ server. We have to register the new server.
255 IRC_Num_ENDOFMOTD(CLIENT * Client, UNUSED REQUEST * Req)
261 Client_SetType(Client, CLIENT_SERVER);
263 Log(LOG_NOTICE | LOG_snotice,
264 "Server \"%s\" registered (connection %d, 1 hop - direct link).",
265 Client_ID(Client), Client_Conn(Client));
267 /* Get highest hop count */
271 if (Client_Hops(c) > max_hops)
272 max_hops = Client_Hops(c);
276 /* Inform the new server about all other servers, and announce the
277 * new server to all the already registered ones. Important: we have
278 * to do this "in order" and can't introduce servers of which the
279 * "toplevel server" isn't known already. */
280 for (i = 0; i < (max_hops + 1); i++) {
281 for (c = Client_First(); c != NULL; c = Client_Next(c)) {
282 if (Client_Type(c) != CLIENT_SERVER)
283 continue; /* not a server */
284 if (Client_Hops(c) != i)
285 continue; /* not actual "nesting level" */
286 if (c == Client || c == Client_ThisServer())
287 continue; /* that's us or the peer! */
289 if (!Announce_Server(Client, c))
294 /* Announce all the users to the new server */
297 if (Client_Type(c) == CLIENT_USER ||
298 Client_Type(c) == CLIENT_SERVICE) {
299 if (!Client_Announce(Client, Client_ThisServer(), c))
305 /* Announce all channels to the new server */
306 chan = Channel_First();
308 if (Channel_IsLocal(chan)) {
309 chan = Channel_Next(chan);
313 /* Send CHANINFO if the peer supports it */
314 if (Client_HasFlag(Client, 'C')) {
315 if (!Send_CHANINFO(Client, chan))
320 if (!Announce_Channel(Client, chan))
323 /* Get next channel ... */
324 chan = Channel_Next(chan);
328 if (Client_HasFlag(Client, 'L')) {
329 LogDebug("Synchronizing INVITE- and BAN-lists ...");
330 if (!Synchronize_Lists(Client))
335 if (!IRC_WriteStrClient(Client, "PING :%s",
336 Client_ID(Client_ThisServer())))
340 } /* IRC_Num_ENDOFMOTD */
343 * Handle ISUPPORT (005) numeric.
346 IRC_Num_ISUPPORT(CLIENT * Client, REQUEST * Req)
351 for (i = 1; i < Req->argc - 1; i++) {
353 value = strchr(key, '=');
359 if (strcmp("NICKLEN", key) == 0) {
360 if ((unsigned int)atol(value) == Conf_MaxNickLength - 1)
363 /* Nickname length settings are different! */
365 "Peer uses incompatible nickname length (%d/%d)! Disconnecting ...",
366 Conf_MaxNickLength - 1, atoi(value));
367 Conn_Close(Client_Conn(Client),
368 "Incompatible nickname length",
375 } /* IRC_Num_ISUPPORT */