1 /*
2 * IRC - Internet Relay Chat, ircd/m_names.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
5 *
6 * See file AUTHORS in IRC package for additional names of
7 * the programmers.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 1, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * $Id$
24 */
25
26 /*
27 * m_functions execute protocol messages on this server:
28 *
29 * cptr is always NON-NULL, pointing to a *LOCAL* client
30 * structure (with an open socket connected!). This
31 * identifies the physical socket where the message
32 * originated (or which caused the m_function to be
33 * executed--some m_functions may call others...).
34 *
35 * sptr is the source of the message, defined by the
36 * prefix part of the message if present. If not
37 * or prefix not found, then sptr==cptr.
38 *
39 * (!IsServer(cptr)) => (cptr == sptr), because
40 * prefixes are taken *only* from servers...
41 *
42 * (IsServer(cptr))
43 * (sptr == cptr) => the message didn't
44 * have the prefix.
45 *
46 * (sptr != cptr && IsServer(sptr) means
47 * the prefix specified servername. (?)
48 *
49 * (sptr != cptr && !IsServer(sptr) means
50 * that message originated from a remote
51 * user (not local).
52 *
53 * combining
54 *
55 * (!IsServer(sptr)) means that, sptr can safely
56 * taken as defining the target structure of the
57 * message in this server.
58 *
59 * *Always* true (if 'parse' and others are working correct):
60 *
61 * 1) sptr->from == cptr (note: cptr->from == cptr)
62 *
63 * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
64 * *cannot* be a local connection, unless it's
65 * actually cptr!). [MyConnect(x) should probably
66 * be defined as (x == x->from) --msa ]
67 *
68 * parc number of variable parameter strings (if zero,
69 * parv is allowed to be NULL)
70 *
71 * parv a NULL terminated list of parameter pointers,
72 *
73 * parv[0], sender (prefix string), if not present
74 * this points to an empty string.
75 * parv[1]...parv[parc-1]
76 * pointers to additional parameters
77 * parv[parc] == NULL, *always*
78 *
79 * note: it is guaranteed that parv[0]..parv[parc-1] are all
80 * non-NULL pointers.
81 */
82 #include "config.h"
83
84 #include "channel.h"
85 #include "client.h"
86 #include "hash.h"
87 #include "ircd.h"
88 #include "ircd_log.h"
89 #include "ircd_reply.h"
90 #include "ircd_string.h"
91 #include "msg.h"
92 #include "numeric.h"
93 #include "numnicks.h"
94 #include "s_user.h"
95 #include "send.h"
96
97 /* #include <assert.h> -- Now using assert in ircd_log.h */
98 #include <string.h>
99
100 /*
101 * Sends a suitably formatted 'names' reply to 'sptr' consisting of nicks within
102 * 'chptr', depending on 'filter'.
103 *
104 * NAMES_ALL - Lists all users on channel.
105 * NAMES_VIS - Only list visible (-i) users. --Gte (04/06/2000).
106 * NAMES_DEL - Show join-delayed names list.
107 * NAMES_EON - When OR'd with the other two, adds an 'End of Names' numeric
108 * used by m_join
109 *
110 */
111
do_names(struct Client * sptr,struct Channel * chptr,int filter)112 void do_names(struct Client* sptr, struct Channel* chptr, int filter)
113 {
114 int mlen;
115 int idx;
116 int flag;
117 int needs_space;
118 int len;
119 char buf[BUFSIZE];
120 struct Client *c2ptr;
121 struct Membership* member;
122
123 assert(chptr);
124 assert(sptr);
125 assert((filter&NAMES_ALL) != (filter&NAMES_VIS));
126
127 /* Tag Pub/Secret channels accordingly. */
128
129 strcpy(buf, "* ");
130 if (PubChannel(chptr))
131 *buf = '=';
132 else if (SecretChannel(chptr))
133 *buf = '@';
134
135 len = strlen(chptr->chname);
136 strcpy(buf + 2, chptr->chname);
137 strcpy(buf + 2 + len, " :");
138
139 idx = len + 4;
140 flag = 1;
141 needs_space = 0;
142
143 if (!ShowChannel(sptr, chptr)) /* Don't list private channels unless we are on them. */
144 return;
145
146 /* Iterate over all channel members, and build up the list. */
147
148 mlen = strlen(cli_name(&me)) + 10 + strlen(cli_name(sptr));
149
150 for (member = chptr->members; member; member = member->next_member)
151 {
152 c2ptr = member->user;
153
154 if (((filter&NAMES_VIS)!=0) && IsInvisible(c2ptr))
155 continue;
156
157 if (IsZombie(member) && member->user != sptr)
158 continue;
159
160 if (IsDelayedJoin(member) && (member->user != sptr) && !(filter & NAMES_DEL))
161 continue;
162
163 if ((!IsDelayedJoin(member) || (member->user == sptr)) && (filter & NAMES_DEL))
164 continue;
165
166 if (needs_space)
167 buf[idx++] = ' ';
168 needs_space=1;
169 if (IsZombie(member))
170 buf[idx++] = '!';
171 else if (IsChanOp(member))
172 buf[idx++] = '@';
173 else if (HasVoice(member))
174 buf[idx++] = '+';
175 strcpy(buf + idx, cli_name(c2ptr));
176 idx += strlen(cli_name(c2ptr));
177 flag = 1;
178 if (mlen + idx + NICKLEN + 5 > BUFSIZE)
179 /* space, modifier, nick, \r \n \0 */
180 {
181 send_reply(sptr, (filter & NAMES_DEL) ? RPL_DELNAMREPLY : RPL_NAMREPLY, buf);
182 idx = len + 4;
183 flag = 0;
184 needs_space=0;
185 }
186 }
187 if (flag)
188 send_reply(sptr, (filter & NAMES_DEL) ? RPL_DELNAMREPLY : RPL_NAMREPLY, buf);
189 if (filter&NAMES_EON)
190 send_reply(sptr, RPL_ENDOFNAMES, chptr->chname);
191 }
192
193 /*
194 * m_names - generic message handler
195 *
196 * parv[0] = sender prefix
197 * parv[1] = channel
198 */
199
m_names(struct Client * cptr,struct Client * sptr,int parc,char * parv[])200 int m_names(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
201 {
202 struct Channel *chptr;
203 struct Channel *ch2ptr;
204 struct Client *c2ptr;
205 struct Membership* member;
206 char* s;
207 char* para = parc > 1 ? parv[1] : 0;
208 int showingdelayed = 0;
209
210 if (parc > 1 && !ircd_strcmp(parv[1], "-D")) {
211 para = (parc > 2) ? parv[2] : 0;
212 showingdelayed = NAMES_DEL;
213 if (parc > 3 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %s %C", 3, parc, parv))
214 return 0;
215 } else if (parc > 2 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %C", 2, parc, parv))
216 return 0;
217
218 if (EmptyString(para)) {
219 send_reply(sptr, RPL_ENDOFNAMES, "*");
220 return 0;
221 }
222
223 do {
224 s = strchr(para, ',');
225 if (s)
226 *s++ = '\0';
227 /*
228 * Special Case 1: "/names 0".
229 * Full list as per RFC.
230 */
231 if ((*para == '0') || (*para == '\0'))
232 {
233 int idx;
234 int mlen;
235 int flag;
236 struct Channel *ch3ptr;
237 char buf[BUFSIZE];
238
239 mlen = strlen(cli_name(&me)) + 10 + strlen(cli_name(sptr));
240
241 /* List all visible channels/visible members */
242
243 for (ch2ptr = GlobalChannelList; ch2ptr; ch2ptr = ch2ptr->next)
244 {
245 if (!ShowChannel(sptr, ch2ptr))
246 continue; /* Don't show secret chans. */
247 else if (find_channel_member(sptr, ch2ptr))
248 do_names(sptr, ch2ptr, showingdelayed|NAMES_ALL); /* Full list if we're in this chan. */
249 else
250 do_names(sptr, ch2ptr, showingdelayed|NAMES_VIS);
251 }
252
253 /* List all remaining users on channel '*' */
254
255 strcpy(buf, "* * :");
256 idx = 5;
257 flag = 0;
258
259 for (c2ptr = GlobalClientList; c2ptr; c2ptr = cli_next(c2ptr))
260 {
261 int showflag = 0;
262
263 if (!IsUser(c2ptr) || (sptr != c2ptr && IsInvisible(c2ptr)))
264 continue;
265
266 member = cli_user(c2ptr)->channel;
267
268 while (member)
269 {
270 ch3ptr = member->channel;
271
272 if (PubChannel(ch3ptr) || find_channel_member(sptr, ch3ptr))
273 showflag = 1;
274
275 member = member->next_channel;
276 }
277
278 if (showflag) /* Have we already shown them? */
279 continue;
280
281 strcpy(buf + idx, cli_name(c2ptr));
282 idx += strlen(cli_name(c2ptr));
283 buf[idx++] = ' ';
284 flag = 1;
285
286 if (mlen + idx + NICKLEN + 3 > BUFSIZE) /* space, \r\n\0 */
287 {
288 buf[idx-1] = '\0';
289 send_reply(sptr, RPL_NAMREPLY, buf);
290 strcpy(buf, "* * :");
291 idx = 5;
292 flag = 0;
293 }
294 }
295 if (flag)
296 {
297 buf[idx-1] = '\0';
298 send_reply(sptr, RPL_NAMREPLY, buf);
299 }
300 send_reply(sptr, RPL_ENDOFNAMES, "*");
301 }
302 else if ((chptr = FindChannel(para)) != NULL)
303 {
304 member = find_member_link(chptr, sptr);
305 if (member)
306 {
307 /*
308 * Special Case 2: User is on this channel, requesting full names list.
309 * (As performed with each /join) - ** High frequency usage **
310 */
311 do_names(sptr, chptr, showingdelayed|NAMES_ALL|NAMES_EON);
312 }
313 else
314 {
315 /*
316 * Special Case 3: User isn't on this channel, show all visible users, in
317 * non secret channels.
318 */
319 do_names(sptr, chptr, showingdelayed|NAMES_VIS|NAMES_EON);
320 }
321 }
322 else
323 send_reply(sptr, RPL_ENDOFNAMES, para);
324 } while ((para = s) != NULL);
325
326 return 1;
327 }
328