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 1.22.2.1 2005/10/06 04:00:26 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     parv[1+showingdelayed] = ++s;
 246     m_names(cptr, sptr, parc, parv);
 247   }
 248
 249   /*
 250    * Special Case 1: "/names 0".
 251    * Full list as per RFC.
 252    */
 253
 254   if (!*para) {
 255     int idx;
 256     int mlen;
 257     int flag;
 258     struct Channel *ch3ptr;
 259     char buf[BUFSIZE];
 260
 261     mlen = strlen(cli_name(&me)) + 10 + strlen(cli_name(sptr));
 262
 263     /* List all visible channels/visible members */
 264
 265     for (ch2ptr = GlobalChannelList; ch2ptr; ch2ptr = ch2ptr->next)
 266     {
 267       if (!ShowChannel(sptr, ch2ptr))
 268         continue;                 /* Don't show secret chans. */
 269
 270       if (find_channel_member(sptr, ch2ptr))
 271       {
 272         do_names(sptr, ch2ptr, (showingdelayed?NAMES_DEL:0)|NAMES_ALL); /* Full list if we're in this chan. */
 273       } else {
 274         do_names(sptr, ch2ptr, (showingdelayed?NAMES_DEL:0)|NAMES_VIS);
 275       }
 276     }
 277
 278     /* List all remaining users on channel '*' */
 279
 280     strcpy(buf, "* * :");
 281     idx = 5;
 282     flag = 0;
 283
 284     for (c2ptr = GlobalClientList; c2ptr; c2ptr = cli_next(c2ptr))
 285     {
 286       int showflag = 0;
 287
 288       if (!IsUser(c2ptr) || (sptr != c2ptr && IsInvisible(c2ptr)))
 289         continue;
 290
 291       member = cli_user(c2ptr)->channel;
 292
 293       while (member)
 294       {
 295         ch3ptr = member->channel;
 296
 297         if (PubChannel(ch3ptr) || find_channel_member(sptr, ch3ptr))
 298           showflag = 1;
 299
 300         member = member->next_channel;
 301       }
 302
 303       if (showflag)               /* Have we already shown them? */
 304         continue;
 305
 306       strcat(buf, cli_name(c2ptr));
 307       strcat(buf, " ");
 308       idx += strlen(cli_name(c2ptr)) + 1;
 309       flag = 1;
 310
 311       if (mlen + idx + NICKLEN + 3 > BUFSIZE)     /* space, \r\n\0 */
 312       {
 313         send_reply(sptr, RPL_NAMREPLY, buf);
 314         strcpy(buf, "* * :");
 315         idx = 5;
 316         flag = 0;
 317       }
 318     }
 319     if (flag)
 320       send_reply(sptr, RPL_NAMREPLY, buf);
 321     send_reply(sptr, RPL_ENDOFNAMES, "*");
 322     return 1;
 323   }
 324
 325   /*
 326    *  Special Case 2: User is on this channel, requesting full names list.
 327    *  (As performed with each /join) - ** High frequency usage **
 328    */
 329
 330   chptr = FindChannel(para);
 331
 332   if (chptr) {
 333     member = find_member_link(chptr, sptr);
 334     if (member)
 335     {
 336       do_names(sptr, chptr, (showingdelayed?NAMES_DEL:0)|NAMES_ALL);
 337       if (!EmptyString(para))
 338       {
 339         send_reply(sptr, RPL_ENDOFNAMES, chptr ? chptr->chname : para);
 340         return 1;
 341       }
 342     }
 343       else
 344     {
 345       /*
 346        *  Special Case 3: User isn't on this channel, show all visible users, in
 347        *  non secret channels.
 348        */
 349       do_names(sptr, chptr, (showingdelayed?NAMES_DEL:0)|NAMES_VIS);
 350       send_reply(sptr, RPL_ENDOFNAMES, para);
 351     }
 352   } else { /* Channel doesn't exist. */
 353       send_reply(sptr, RPL_ENDOFNAMES, para);
 354   }
 355   return 1;
 356 }
 357
 358
 359 /*
 360  * ms_names - server message handler
 361  *
 362  * parv[0] = sender prefix
 363  * parv[1] = channel
 364  */
 365 int ms_names(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 366 {
 367   struct Channel *chptr;
 368   struct Channel *ch2ptr;
 369   struct Client *c2ptr;
 370   struct Membership* member;
 371   char* s;
 372   char* para = parc > 1 ? parv[1] : 0;
 373   int showingdelayed = 0;
 374
 375   if (parc > 1 && !ircd_strcmp(parv[1], "-D")) {
 376     para = (parc > 2) ? parv[2] : 0;
 377     showingdelayed = NAMES_DEL;
 378     if (parc > 3 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %s %C", 3, parc, parv))
 379       return 0;
 380   } else if (parc > 2 && hunt_server_cmd(sptr, CMD_NAMES, cptr, 1, "%s %C", 2, parc, parv))
 381     return 0;
 382
 383   if (EmptyString(para)) {
 384     send_reply(sptr, RPL_ENDOFNAMES, "*");
 385     return 0;
 386   }
 387   else if (*para == '0')
 388     *para = '\0';
 389
 390   s = strchr(para, ','); /* Recursively call m_names for each comma-separated channel. */
 391   if (s) {
 392     parv[1+!!showingdelayed] = ++s;
 393     m_names(cptr, sptr, parc, parv);
 394   }
 395
 396   /*
 397    * Special Case 1: "/names 0".
 398    * Full list as per RFC.
 399    */
 400
 401   if (!*para) {
 402     int idx;
 403     int mlen;
 404     int flag;
 405     struct Channel *ch3ptr;
 406     char buf[BUFSIZE];
 407
 408     mlen = strlen(cli_name(&me)) + 10 + strlen(cli_name(sptr));
 409
 410     /* List all visible channels/visible members */
 411
 412     for (ch2ptr = GlobalChannelList; ch2ptr; ch2ptr = ch2ptr->next)
 413     {
 414       if (!ShowChannel(sptr, ch2ptr))
 415         continue;                 /* Don't show secret chans. */
 416
 417       if (find_channel_member(sptr, ch2ptr))
 418       {
 419         do_names(sptr, ch2ptr, showingdelayed|NAMES_ALL); /* Full list if we're in this chan. */
 420       } else {
 421         do_names(sptr, ch2ptr, showingdelayed|NAMES_VIS);
 422       }
 423     }
 424
 425     /* List all remaining users on channel '*' */
 426
 427     strcpy(buf, "* * :");
 428     idx = 5;
 429     flag = 0;
 430
 431     for (c2ptr = GlobalClientList; c2ptr; c2ptr = cli_next(c2ptr))
 432     {
 433       int showflag = 0;
 434
 435       if (!IsUser(c2ptr) || (sptr != c2ptr && IsInvisible(c2ptr)))
 436         continue;
 437
 438       member = cli_user(c2ptr)->channel;
 439
 440       while (member)
 441       {
 442         ch3ptr = member->channel;
 443
 444         if (PubChannel(ch3ptr) || find_channel_member(sptr, ch3ptr))
 445           showflag = 1;
 446
 447         member = member->next_channel;
 448       }
 449
 450       if (showflag)               /* Have we already shown them? */
 451         continue;
 452
 453       strcat(buf, cli_name(c2ptr));
 454       strcat(buf, " ");
 455       idx += strlen(cli_name(c2ptr)) + 1;
 456       flag = 1;
 457
 458       if (mlen + idx + NICKLEN + 3 > BUFSIZE)     /* space, \r\n\0 */
 459       {
 460         send_reply(sptr, RPL_NAMREPLY, buf);
 461         strcpy(buf, "* * :");
 462         idx = 5;
 463         flag = 0;
 464       }
 465     }
 466     if (flag)
 467       send_reply(sptr, RPL_NAMREPLY, buf);
 468     send_reply(sptr, RPL_ENDOFNAMES, "*");
 469     return 1;
 470   }
 471
 472   /*
 473    *  Special Case 2: User is on this channel, requesting full names list.
 474    *  (As performed with each /join) - ** High frequency usage **
 475    */
 476
 477   chptr = FindChannel(para);
 478
 479   if (chptr) {
 480     member = find_member_link(chptr, sptr);
 481     if (member)
 482     {
 483       do_names(sptr, chptr, showingdelayed|NAMES_ALL);
 484       if (!EmptyString(para))
 485       {
 486         send_reply(sptr, RPL_ENDOFNAMES, chptr ? chptr->chname : para);
 487         return 1;
 488       }
 489     }
 490       else
 491     {
 492       /*
 493        *  Special Case 3: User isn't on this channel, show all visible users, in
 494        *  non secret channels.
 495        */
 496       do_names(sptr, chptr, showingdelayed|NAMES_VIS);
 497     }
 498   } else { /* Channel doesn't exist. */
 499       send_reply(sptr, RPL_ENDOFNAMES, para);
 500   }
 501   return 1;
 502 }