ircd/m_names.c

   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: m_names.c,v 1.22.2.2 2005/11/17 00:05:00 entrope Exp $
  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_EON - When OR'd with the other two, adds an 'End of Names' numeric
 107  *              used by m_join
 108  *
 109  */
 110
 111 void do_names(struct Client* sptr, struct Channel* chptr, int filter)
 112 {
 113   int mlen;
 114   int idx;
 115   int flag;
 116   int needs_space;
 117   int len;
 118   char buf[BUFSIZE];
 119   struct Client *c2ptr;
 120   struct Membership* member;
 121
 122   assert(chptr);
 123   assert(sptr);
 124   assert((filter&NAMES_ALL) != (filter&NAMES_VIS));
 125
 126   /* Tag Pub/Secret channels accordingly. */
 127
 128   strcpy(buf, "* ");
 129   if (PubChannel(chptr))
 130     *buf = '=';
 131   else if (SecretChannel(chptr))
 132     *buf = '@';
 133
 134   len = strlen(chptr->chname);
 135   strcpy(buf + 2, chptr->chname);
 136   strcpy(buf + 2 + len, " :");
 137
 138   idx = len + 4;
 139   flag = 1;
 140   needs_space = 0;
 141
 142   if (!ShowChannel(sptr, chptr)) /* Don't list private channels unless we are on them. */
 143     return;
 144
 145   /* Iterate over all channel members, and build up the list. */
 146
 147   mlen = strlen(cli_name(&me)) + 10 + strlen(cli_name(sptr));
 148
 149   for (member = chptr->members; member; member = member->next_member)
 150   {
 151     c2ptr = member->user;
 152
 153     if (((filter&NAMES_VIS)!=0) && IsInvisible(c2ptr))
 154       continue;
 155
 156     if (IsZombie(member) && member->user != sptr)
 157       continue;
 158
 159     if (IsDelayedJoin(member) && (member->user != sptr) && !(filter & NAMES_DEL))
 160         continue;
 161
 162     if ((!IsDelayedJoin(member) || (member->user == sptr)) && (filter & NAMES_DEL))
 163         continue;
 164
 165     if (needs_space) {
 166         strcat(buf, " ");
 167       idx++;
 168     }
 169     needs_space=1;
 170     if (IsZombie(member))
 171     {
 172       strcat(buf, "!");
 173       idx++;
 174     }
 175     else if (IsChanOp(member))
 176     {
 177       strcat(buf, "@");
 178       idx++;
 179     }
 180     else if (HasVoice(member))
 181     {
 182       strcat(buf, "+");
 183       idx++;
 184     }
 185     strcat(buf, cli_name(c2ptr));
 186     idx += strlen(cli_name(c2ptr));
 187     flag = 1;
 188     if (mlen + idx + NICKLEN + 5 > BUFSIZE)
 189       /* space, modifier, nick, \r \n \0 */
 190     {
 191       send_reply(sptr, (filter & NAMES_DEL) ? RPL_DELNAMREPLY : RPL_NAMREPLY, buf);
 192       idx = len + 4;
 193       flag = 0;
 194       needs_space=0;
 195     }
 196   }
 197   if (flag)
 198     send_reply(sptr, (filter & NAMES_DEL) ? RPL_DELNAMREPLY : RPL_NAMREPLY, buf);
 199   if (filter&NAMES_EON)
 200     send_reply(sptr, RPL_ENDOFNAMES, chptr->chname);
 201 }
 202
 203 /*
 204  * m_names - generic message handler
 205  *
 206  * parv[0] = sender prefix
 207  * parv[1] = channel
 208  */
 209
 210 int m_names(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 211 {
 212   struct Channel *chptr;
 213   struct Channel *ch2ptr;
 214   struct Client *c2ptr;
 215   struct Membership* member;
 216   char* s;
 217   char* para = parc > 1 ? parv[1] : 0;
 218   int showingdelayed = 0;
 219
 220   if (parc > 1 && !ircd_strcmp(parv[1], "-D")) {
 221     para = (parc > 2) ? parv[2] : 0;
 222     showingdelayed = 1;
 223     if (parc > 3 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %s %C", 3, parc, parv))
 224       return 0;
 225   } else if (parc > 2 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %C", 2, parc, parv))
 226     return 0;
 227
 228   if (EmptyString(para)) {
 229     send_reply(sptr, RPL_ENDOFNAMES, "*");
 230     return 0;
 231   }
 232   else if (*para == '0')
 233     *para = '\0';
 234
 235   s = strchr(para, ','); /* Recursively call m_names for each comma-separated channel. Eww. */
 236   if (s) {
 237     *s++ = '\0';
 238     parv[1+showingdelayed] = s;
 239     m_names(cptr, sptr, parc, parv);
 240   }
 241
 242   /*
 243    * Special Case 1: "/names 0".
 244    * Full list as per RFC.
 245    */
 246
 247   if (!*para) {
 248     int idx;
 249     int mlen;
 250     int flag;
 251     struct Channel *ch3ptr;
 252     char buf[BUFSIZE];
 253
 254     mlen = strlen(cli_name(&me)) + 10 + strlen(cli_name(sptr));
 255
 256     /* List all visible channels/visible members */
 257
 258     for (ch2ptr = GlobalChannelList; ch2ptr; ch2ptr = ch2ptr->next)
 259     {
 260       if (!ShowChannel(sptr, ch2ptr))
 261         continue;                 /* Don't show secret chans. */
 262
 263       if (find_channel_member(sptr, ch2ptr))
 264       {
 265         do_names(sptr, ch2ptr, (showingdelayed?NAMES_DEL:0)|NAMES_ALL); /* Full list if we're in this chan. */
 266       } else {
 267         do_names(sptr, ch2ptr, (showingdelayed?NAMES_DEL:0)|NAMES_VIS);
 268       }
 269     }
 270
 271     /* List all remaining users on channel '*' */
 272
 273     strcpy(buf, "* * :");
 274     idx = 5;
 275     flag = 0;
 276
 277     for (c2ptr = GlobalClientList; c2ptr; c2ptr = cli_next(c2ptr))
 278     {
 279       int showflag = 0;
 280
 281       if (!IsUser(c2ptr) || (sptr != c2ptr && IsInvisible(c2ptr)))
 282         continue;
 283
 284       member = cli_user(c2ptr)->channel;
 285
 286       while (member)
 287       {
 288         ch3ptr = member->channel;
 289
 290         if (PubChannel(ch3ptr) || find_channel_member(sptr, ch3ptr))
 291           showflag = 1;
 292
 293         member = member->next_channel;
 294       }
 295
 296       if (showflag)               /* Have we already shown them? */
 297         continue;
 298
 299       strcat(buf, cli_name(c2ptr));
 300       strcat(buf, " ");
 301       idx += strlen(cli_name(c2ptr)) + 1;
 302       flag = 1;
 303
 304       if (mlen + idx + NICKLEN + 3 > BUFSIZE)     /* space, \r\n\0 */
 305       {
 306         send_reply(sptr, RPL_NAMREPLY, buf);
 307         strcpy(buf, "* * :");
 308         idx = 5;
 309         flag = 0;
 310       }
 311     }
 312     if (flag)
 313       send_reply(sptr, RPL_NAMREPLY, buf);
 314     send_reply(sptr, RPL_ENDOFNAMES, "*");
 315     return 1;
 316   }
 317
 318   /*
 319    *  Special Case 2: User is on this channel, requesting full names list.
 320    *  (As performed with each /join) - ** High frequency usage **
 321    */
 322
 323   chptr = FindChannel(para);
 324
 325   if (chptr) {
 326     member = find_member_link(chptr, sptr);
 327     if (member)
 328     {
 329       do_names(sptr, chptr, (showingdelayed?NAMES_DEL:0)|NAMES_ALL);
 330       if (!EmptyString(para))
 331       {
 332         send_reply(sptr, RPL_ENDOFNAMES, chptr ? chptr->chname : para);
 333         return 1;
 334       }
 335     }
 336       else
 337     {
 338       /*
 339        *  Special Case 3: User isn't on this channel, show all visible users, in
 340        *  non secret channels.
 341        */
 342       do_names(sptr, chptr, (showingdelayed?NAMES_DEL:0)|NAMES_VIS);
 343       send_reply(sptr, RPL_ENDOFNAMES, para);
 344     }
 345   } else { /* Channel doesn't exist. */
 346       send_reply(sptr, RPL_ENDOFNAMES, para);
 347   }
 348   return 1;
 349 }
 350
 351
 352 /*
 353  * ms_names - server message handler
 354  *
 355  * parv[0] = sender prefix
 356  * parv[1] = channel
 357  */
 358 int ms_names(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 359 {
 360   struct Channel *chptr;
 361   struct Channel *ch2ptr;
 362   struct Client *c2ptr;
 363   struct Membership* member;
 364   char* s;
 365   char* para = parc > 1 ? parv[1] : 0;
 366   int showingdelayed = 0;
 367
 368   if (parc > 1 && !ircd_strcmp(parv[1], "-D")) {
 369     para = (parc > 2) ? parv[2] : 0;
 370     showingdelayed = NAMES_DEL;
 371     if (parc > 3 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %s %C", 3, parc, parv))
 372       return 0;
 373   } else if (parc > 2 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %C", 2, parc, parv))
 374     return 0;
 375
 376   if (EmptyString(para)) {
 377     send_reply(sptr, RPL_ENDOFNAMES, "*");
 378     return 0;
 379   }
 380   else if (*para == '0')
 381     *para = '\0';
 382
 383   s = strchr(para, ','); /* Recursively call m_names for each comma-separated channel. */
 384   if (s) {
 385     *s++ = '\0';
 386     parv[1+!!showingdelayed] = s;
 387     m_names(cptr, sptr, parc, parv);
 388   }
 389
 390   /*
 391    * Special Case 1: "/names 0".
 392    * Full list as per RFC.
 393    */
 394
 395   if (!*para) {
 396     int idx;
 397     int mlen;
 398     int flag;
 399     struct Channel *ch3ptr;
 400     char buf[BUFSIZE];
 401
 402     mlen = strlen(cli_name(&me)) + 10 + strlen(cli_name(sptr));
 403
 404     /* List all visible channels/visible members */
 405
 406     for (ch2ptr = GlobalChannelList; ch2ptr; ch2ptr = ch2ptr->next)
 407     {
 408       if (!ShowChannel(sptr, ch2ptr))
 409         continue;                 /* Don't show secret chans. */
 410
 411       if (find_channel_member(sptr, ch2ptr))
 412       {
 413         do_names(sptr, ch2ptr, showingdelayed|NAMES_ALL); /* Full list if we're in this chan. */
 414       } else {
 415         do_names(sptr, ch2ptr, showingdelayed|NAMES_VIS);
 416       }
 417     }
 418
 419     /* List all remaining users on channel '*' */
 420
 421     strcpy(buf, "* * :");
 422     idx = 5;
 423     flag = 0;
 424
 425     for (c2ptr = GlobalClientList; c2ptr; c2ptr = cli_next(c2ptr))
 426     {
 427       int showflag = 0;
 428
 429       if (!IsUser(c2ptr) || (sptr != c2ptr && IsInvisible(c2ptr)))
 430         continue;
 431
 432       member = cli_user(c2ptr)->channel;
 433
 434       while (member)
 435       {
 436         ch3ptr = member->channel;
 437
 438         if (PubChannel(ch3ptr) || find_channel_member(sptr, ch3ptr))
 439           showflag = 1;
 440
 441         member = member->next_channel;
 442       }
 443
 444       if (showflag)               /* Have we already shown them? */
 445         continue;
 446
 447       strcat(buf, cli_name(c2ptr));
 448       strcat(buf, " ");
 449       idx += strlen(cli_name(c2ptr)) + 1;
 450       flag = 1;
 451
 452       if (mlen + idx + NICKLEN + 3 > BUFSIZE)     /* space, \r\n\0 */
 453       {
 454         send_reply(sptr, RPL_NAMREPLY, buf);
 455         strcpy(buf, "* * :");
 456         idx = 5;
 457         flag = 0;
 458       }
 459     }
 460     if (flag)
 461       send_reply(sptr, RPL_NAMREPLY, buf);
 462     send_reply(sptr, RPL_ENDOFNAMES, "*");
 463     return 1;
 464   }
 465
 466   /*
 467    *  Special Case 2: User is on this channel, requesting full names list.
 468    *  (As performed with each /join) - ** High frequency usage **
 469    */
 470
 471   chptr = FindChannel(para);
 472
 473   if (chptr) {
 474     member = find_member_link(chptr, sptr);
 475     if (member)
 476     {
 477       do_names(sptr, chptr, showingdelayed|NAMES_ALL);
 478       if (!EmptyString(para))
 479       {
 480         send_reply(sptr, RPL_ENDOFNAMES, chptr ? chptr->chname : para);
 481         return 1;
 482       }
 483     }
 484       else
 485     {
 486       /*
 487        *  Special Case 3: User isn't on this channel, show all visible users, in
 488        *  non secret channels.
 489        */
 490       do_names(sptr, chptr, showingdelayed|NAMES_VIS);
 491     }
 492   } else { /* Channel doesn't exist. */
 493       send_reply(sptr, RPL_ENDOFNAMES, para);
 494   }
 495   return 1;
 496 }