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       strcpy(buf, "* ");
 193       ircd_strncpy(buf + 2, chptr->chname, len + 1);
 194       buf[len + 2] = 0;
 195       strcat(buf, " :");
 196       if (PubChannel(chptr))
 197         *buf = '=';
 198       else if (SecretChannel(chptr))
 199         *buf = '@';
 200       idx = len + 4;
 201       flag = 0;
 202       needs_space=0;
 203     }
 204   }
 205   if (flag)
 206     send_reply(sptr, (filter & NAMES_DEL) ? RPL_DELNAMREPLY : RPL_NAMREPLY, buf);
 207   if (filter&NAMES_EON)
 208     send_reply(sptr, RPL_ENDOFNAMES, chptr->chname);
 209 }
 210
 211 /*
 212  * m_names - generic message handler
 213  *
 214  * parv[0] = sender prefix
 215  * parv[1] = channel
 216  */
 217
 218 int m_names(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 219 {
 220   struct Channel *chptr;
 221   struct Channel *ch2ptr;
 222   struct Client *c2ptr;
 223   struct Membership* member;
 224   char* s;
 225   char* para = parc > 1 ? parv[1] : 0;
 226   int showingdelayed = 0;
 227
 228   if (parc > 1 && !ircd_strcmp(parv[1], "-D")) {
 229     para = (parc > 2) ? parv[2] : 0;
 230     showingdelayed = 1;
 231     if (parc > 3 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %s %C", 3, parc, parv))
 232       return 0;
 233   } else if (parc > 2 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %C", 2, parc, parv))
 234     return 0;
 235
 236   if (EmptyString(para)) {
 237     send_reply(sptr, RPL_ENDOFNAMES, "*");
 238     return 0;
 239   }
 240   else if (*para == '0')
 241     *para = '\0';
 242
 243   s = strchr(para, ','); /* Recursively call m_names for each comma-separated channel. Eww. */
 244   if (s) {
 245     *s++ = '\0';
 246     parv[1+showingdelayed] = s;
 247     m_names(cptr, sptr, parc, parv);
 248   }
 249
 250   /*
 251    * Special Case 1: "/names 0".
 252    * Full list as per RFC.
 253    */
 254
 255   if (!*para) {
 256     int idx;
 257     int mlen;
 258     int flag;
 259     struct Channel *ch3ptr;
 260     char buf[BUFSIZE];
 261
 262     mlen = strlen(cli_name(&me)) + 10 + strlen(cli_name(sptr));
 263
 264     /* List all visible channels/visible members */
 265
 266     for (ch2ptr = GlobalChannelList; ch2ptr; ch2ptr = ch2ptr->next)
 267     {
 268       if (!ShowChannel(sptr, ch2ptr))
 269         continue;                 /* Don't show secret chans. */
 270
 271       if (find_channel_member(sptr, ch2ptr))
 272       {
 273         do_names(sptr, ch2ptr, (showingdelayed?NAMES_DEL:0)|NAMES_ALL); /* Full list if we're in this chan. */
 274       } else {
 275         do_names(sptr, ch2ptr, (showingdelayed?NAMES_DEL:0)|NAMES_VIS);
 276       }
 277     }
 278
 279     /* List all remaining users on channel '*' */
 280
 281     strcpy(buf, "* * :");
 282     idx = 5;
 283     flag = 0;
 284
 285     for (c2ptr = GlobalClientList; c2ptr; c2ptr = cli_next(c2ptr))
 286     {
 287       int showflag = 0;
 288
 289       if (!IsUser(c2ptr) || (sptr != c2ptr && IsInvisible(c2ptr)))
 290         continue;
 291
 292       member = cli_user(c2ptr)->channel;
 293
 294       while (member)
 295       {
 296         ch3ptr = member->channel;
 297
 298         if (PubChannel(ch3ptr) || find_channel_member(sptr, ch3ptr))
 299           showflag = 1;
 300
 301         member = member->next_channel;
 302       }
 303
 304       if (showflag)               /* Have we already shown them? */
 305         continue;
 306
 307       strcat(buf, cli_name(c2ptr));
 308       strcat(buf, " ");
 309       idx += strlen(cli_name(c2ptr)) + 1;
 310       flag = 1;
 311
 312       if (mlen + idx + NICKLEN + 3 > BUFSIZE)     /* space, \r\n\0 */
 313       {
 314         send_reply(sptr, RPL_NAMREPLY, buf);
 315         strcpy(buf, "* * :");
 316         idx = 5;
 317         flag = 0;
 318       }
 319     }
 320     if (flag)
 321       send_reply(sptr, RPL_NAMREPLY, buf);
 322     send_reply(sptr, RPL_ENDOFNAMES, "*");
 323     return 1;
 324   }
 325
 326   /*
 327    *  Special Case 2: User is on this channel, requesting full names list.
 328    *  (As performed with each /join) - ** High frequency usage **
 329    */
 330
 331   chptr = FindChannel(para);
 332
 333   if (chptr) {
 334     member = find_member_link(chptr, sptr);
 335     if (member)
 336     {
 337       do_names(sptr, chptr, (showingdelayed?NAMES_DEL:0)|NAMES_ALL);
 338       if (!EmptyString(para))
 339       {
 340         send_reply(sptr, RPL_ENDOFNAMES, chptr ? chptr->chname : para);
 341         return 1;
 342       }
 343     }
 344       else
 345     {
 346       /*
 347        *  Special Case 3: User isn't on this channel, show all visible users, in
 348        *  non secret channels.
 349        */
 350       do_names(sptr, chptr, (showingdelayed?NAMES_DEL:0)|NAMES_VIS);
 351       send_reply(sptr, RPL_ENDOFNAMES, para);
 352     }
 353   } else { /* Channel doesn't exist. */
 354       send_reply(sptr, RPL_ENDOFNAMES, para);
 355   }
 356   return 1;
 357 }
 358
 359
 360 /*
 361  * ms_names - server message handler
 362  *
 363  * parv[0] = sender prefix
 364  * parv[1] = channel
 365  */
 366 int ms_names(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 367 {
 368   struct Channel *chptr;
 369   struct Channel *ch2ptr;
 370   struct Client *c2ptr;
 371   struct Membership* member;
 372   char* s;
 373   char* para = parc > 1 ? parv[1] : 0;
 374   int showingdelayed = 0;
 375
 376   if (parc > 1 && !ircd_strcmp(parv[1], "-D")) {
 377     para = (parc > 2) ? parv[2] : 0;
 378     showingdelayed = NAMES_DEL;
 379     if (parc > 3 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %s %C", 3, parc, parv))
 380       return 0;
 381   } else if (parc > 2 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %C", 2, parc, parv))
 382     return 0;
 383
 384   if (EmptyString(para)) {
 385     send_reply(sptr, RPL_ENDOFNAMES, "*");
 386     return 0;
 387   }
 388   else if (*para == '0')
 389     *para = '\0';
 390
 391   s = strchr(para, ','); /* Recursively call m_names for each comma-separated channel. */
 392   if (s) {
 393     *s++ = '\0';
 394     parv[1+!!showingdelayed] = s;
 395     m_names(cptr, sptr, parc, parv);
 396   }
 397
 398   /*
 399    * Special Case 1: "/names 0".
 400    * Full list as per RFC.
 401    */
 402
 403   if (!*para) {
 404     int idx;
 405     int mlen;
 406     int flag;
 407     struct Channel *ch3ptr;
 408     char buf[BUFSIZE];
 409
 410     mlen = strlen(cli_name(&me)) + 10 + strlen(cli_name(sptr));
 411
 412     /* List all visible channels/visible members */
 413
 414     for (ch2ptr = GlobalChannelList; ch2ptr; ch2ptr = ch2ptr->next)
 415     {
 416       if (!ShowChannel(sptr, ch2ptr))
 417         continue;                 /* Don't show secret chans. */
 418
 419       if (find_channel_member(sptr, ch2ptr))
 420       {
 421         do_names(sptr, ch2ptr, showingdelayed|NAMES_ALL); /* Full list if we're in this chan. */
 422       } else {
 423         do_names(sptr, ch2ptr, showingdelayed|NAMES_VIS);
 424       }
 425     }
 426
 427     /* List all remaining users on channel '*' */
 428
 429     strcpy(buf, "* * :");
 430     idx = 5;
 431     flag = 0;
 432
 433     for (c2ptr = GlobalClientList; c2ptr; c2ptr = cli_next(c2ptr))
 434     {
 435       int showflag = 0;
 436
 437       if (!IsUser(c2ptr) || (sptr != c2ptr && IsInvisible(c2ptr)))
 438         continue;
 439
 440       member = cli_user(c2ptr)->channel;
 441
 442       while (member)
 443       {
 444         ch3ptr = member->channel;
 445
 446         if (PubChannel(ch3ptr) || find_channel_member(sptr, ch3ptr))
 447           showflag = 1;
 448
 449         member = member->next_channel;
 450       }
 451
 452       if (showflag)               /* Have we already shown them? */
 453         continue;
 454
 455       strcat(buf, cli_name(c2ptr));
 456       strcat(buf, " ");
 457       idx += strlen(cli_name(c2ptr)) + 1;
 458       flag = 1;
 459
 460       if (mlen + idx + NICKLEN + 3 > BUFSIZE)     /* space, \r\n\0 */
 461       {
 462         send_reply(sptr, RPL_NAMREPLY, buf);
 463         strcpy(buf, "* * :");
 464         idx = 5;
 465         flag = 0;
 466       }
 467     }
 468     if (flag)
 469       send_reply(sptr, RPL_NAMREPLY, buf);
 470     send_reply(sptr, RPL_ENDOFNAMES, "*");
 471     return 1;
 472   }
 473
 474   /*
 475    *  Special Case 2: User is on this channel, requesting full names list.
 476    *  (As performed with each /join) - ** High frequency usage **
 477    */
 478
 479   chptr = FindChannel(para);
 480
 481   if (chptr) {
 482     member = find_member_link(chptr, sptr);
 483     if (member)
 484     {
 485       do_names(sptr, chptr, showingdelayed|NAMES_ALL);
 486       if (!EmptyString(para))
 487       {
 488         send_reply(sptr, RPL_ENDOFNAMES, chptr ? chptr->chname : para);
 489         return 1;
 490       }
 491     }
 492       else
 493     {
 494       /*
 495        *  Special Case 3: User isn't on this channel, show all visible users, in
 496        *  non secret channels.
 497        */
 498       do_names(sptr, chptr, showingdelayed|NAMES_VIS);
 499     }
 500   } else { /* Channel doesn't exist. */
 501       send_reply(sptr, RPL_ENDOFNAMES, para);
 502   }
 503   return 1;
 504 }