src/ngircd/irc.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors.
   4  *
   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.
  10  */
  11
  12 #include "portab.h"
  13
  14 /**
  15  * @file
  16  * IRC commands
  17  */
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24 #include "ngircd.h"
  25 #include "conn-func.h"
  26 #include "conf.h"
  27 #include "channel.h"
  28 #include "conn-encoding.h"
  29 #include "defines.h"
  30 #include "irc-write.h"
  31 #include "log.h"
  32 #include "match.h"
  33 #include "messages.h"
  34 #include "parse.h"
  35 #include "tool.h"
  36
  37 #include "exp.h"
  38 #include "irc.h"
  39
  40
  41 static char *Option_String PARAMS((CONN_ID Idx));
  42 static bool Send_Message PARAMS((CLIENT *Client, REQUEST *Req, int ForceType,
  43                                  bool SendErrors));
  44 static bool Send_Message_Mask PARAMS((CLIENT *from, char *command,
  45                                       char *targetMask, char *message,
  46                                       bool SendErrors));
  47
  48
  49 /**
  50  * Check if a list limit is reached and inform client accordingly.
  51  *
  52  * @param From The client.
  53  * @param Count Reply item count.
  54  * @param Limit Reply limit.
  55  * @param Name Name of the list.
  56  * @return true if list limit has been reached; false otherwise.
  57  */
  58 GLOBAL bool
  59 IRC_CheckListTooBig(CLIENT *From, const int Count, const int Limit,
  60                     const char *Name)
  61 {
  62         assert(From != NULL);
  63         assert(Count >= 0);
  64         assert(Limit > 0);
  65         assert(Name != NULL);
  66
  67         if (Count < Limit)
  68                 return false;
  69
  70         (void)IRC_WriteStrClient(From,
  71                                  "NOTICE %s :%s list limit (%d) reached!",
  72                                  Client_ID(From), Name, Limit);
  73         IRC_SetPenalty(From, 2);
  74         return true;
  75 }
  76
  77
  78 GLOBAL bool
  79 IRC_ERROR( CLIENT *Client, REQUEST *Req )
  80 {
  81         assert( Client != NULL );
  82         assert( Req != NULL );
  83
  84         if (Req->argc < 1)
  85                 Log(LOG_NOTICE, "Got ERROR from \"%s\"!",
  86                     Client_Mask(Client));
  87         else
  88                 Log(LOG_NOTICE, "Got ERROR from \"%s\": \"%s\"!",
  89                     Client_Mask(Client), Req->argv[0]);
  90
  91         return CONNECTED;
  92 } /* IRC_ERROR */
  93
  94
  95 /**
  96  * Handler for the IRC "KILL" command.
  97  *
  98  * This function implements the IRC command "KILL" wich is used to selectively
  99  * disconnect clients. It can be used by IRC operators and servers, for example
 100  * to "solve" nick collisions after netsplits. See RFC 2812 section 3.7.1.
 101  *
 102  * Please note that this function is also called internally, without a real
 103  * KILL command being received over the network! Client is Client_ThisServer()
 104  * in this case, and the prefix in Req is NULL.
 105  *
 106  * @param Client        The client from which this command has been received
 107  *                      or Client_ThisServer() when generated interanlly.
 108  * @param Req           Request structure with prefix and all parameters.
 109  * @returns             CONNECTED or DISCONNECTED.
 110  */
 111 GLOBAL bool
 112 IRC_KILL( CLIENT *Client, REQUEST *Req )
 113 {
 114         CLIENT *prefix, *c;
 115         char reason[COMMAND_LEN], *msg;
 116         CONN_ID my_conn, conn;
 117
 118         assert (Client != NULL);
 119         assert (Req != NULL);
 120
 121         if (Client_Type(Client) != CLIENT_SERVER && !Client_OperByMe(Client))
 122                 return IRC_WriteStrClient(Client, ERR_NOPRIVILEGES_MSG,
 123                                           Client_ID(Client));
 124
 125         if (Req->argc != 2)
 126                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 127                                           Client_ID(Client), Req->command);
 128
 129         /* Get prefix (origin); use the client if no prefix is given. */
 130         if (Req->prefix)
 131                 prefix = Client_Search(Req->prefix);
 132         else
 133                 prefix = Client;
 134
 135         /* Log a warning message and use this server as origin when the
 136          * prefix (origin) is invalid. */
 137         if (!prefix) {
 138                 Log(LOG_WARNING, "Got KILL with invalid prefix: \"%s\"!",
 139                     Req->prefix );
 140                 prefix = Client_ThisServer();
 141         }
 142
 143         if (Client != Client_ThisServer())
 144                 Log(LOG_NOTICE|LOG_snotice,
 145                     "Got KILL command from \"%s\" for \"%s\": %s",
 146                     Client_Mask(prefix), Req->argv[0], Req->argv[1]);
 147
 148         /* Build reason string: Prefix the "reason" if the originator is a
 149          * regular user, so users can't spoof KILLs of servers. */
 150         if (Client_Type(Client) == CLIENT_USER)
 151                 snprintf(reason, sizeof(reason), "KILLed by %s: %s",
 152                          Client_ID(Client), Req->argv[1]);
 153         else
 154                 strlcpy(reason, Req->argv[1], sizeof(reason));
 155
 156         /* Inform other servers */
 157         IRC_WriteStrServersPrefix(Client, prefix, "KILL %s :%s",
 158                                   Req->argv[0], reason);
 159
 160         /* Save ID of this connection */
 161         my_conn = Client_Conn( Client );
 162
 163         /* Do we host such a client? */
 164         c = Client_Search( Req->argv[0] );
 165         if( c )
 166         {
 167                 if(( Client_Type( c ) != CLIENT_USER ) &&
 168                    ( Client_Type( c ) != CLIENT_GOTNICK ))
 169                 {
 170                         /* Target of this KILL is not a regular user, this is
 171                          * invalid! So we ignore this case if we received a
 172                          * regular KILL from the network and try to kill the
 173                          * client/connection anyway (but log an error!) if the
 174                          * origin is the local server. */
 175
 176                         if( Client != Client_ThisServer( ))
 177                         {
 178                                 /* Invalid KILL received from remote */
 179                                 if( Client_Type( c ) == CLIENT_SERVER )
 180                                         msg = ERR_CANTKILLSERVER_MSG;
 181                                 else
 182                                         msg = ERR_NOPRIVILEGES_MSG;
 183                                 return IRC_WriteStrClient( Client, msg,
 184                                         Client_ID( Client ));
 185                         }
 186
 187                         Log( LOG_ERR, "Got KILL for invalid client type: %d, \"%s\"!",
 188                              Client_Type( c ), Req->argv[0] );
 189                 }
 190
 191                 /* Kill the client NOW:
 192                  *  - Close the local connection (if there is one),
 193                  *  - Destroy the CLIENT structure for remote clients.
 194                  * Note: Conn_Close() removes the CLIENT structure as well. */
 195                 conn = Client_Conn( c );
 196                 if(conn > NONE)
 197                         Conn_Close(conn, NULL, reason, true);
 198                 else
 199                         Client_Destroy(c, NULL, reason, false);
 200         }
 201         else
 202                 Log( LOG_NOTICE, "Client with nick \"%s\" is unknown here.", Req->argv[0] );
 203
 204         /* Are we still connected or were we killed, too? */
 205         if(( my_conn > NONE ) && ( Conn_GetClient( my_conn )))
 206                 return CONNECTED;
 207         else
 208                 return DISCONNECTED;
 209 } /* IRC_KILL */
 210
 211
 212 /**
 213  * Handler for the IRC command NOTICE.
 214  */
 215 GLOBAL bool
 216 IRC_NOTICE(CLIENT *Client, REQUEST *Req)
 217 {
 218         return Send_Message(Client, Req, CLIENT_USER, false);
 219 } /* IRC_NOTICE */
 220
 221
 222 /**
 223  * Handler for the IRC command PRIVMSG.
 224  */
 225 GLOBAL bool
 226 IRC_PRIVMSG(CLIENT *Client, REQUEST *Req)
 227 {
 228         return Send_Message(Client, Req, CLIENT_USER, true);
 229 } /* IRC_PRIVMSG */
 230
 231
 232 /**
 233  * Handler for the IRC command SQUERY.
 234  */
 235 GLOBAL bool
 236 IRC_SQUERY(CLIENT *Client, REQUEST *Req)
 237 {
 238         return Send_Message(Client, Req, CLIENT_SERVICE, true);
 239 } /* IRC_SQUERY */
 240
 241
 242 GLOBAL bool
 243 IRC_TRACE( CLIENT *Client, REQUEST *Req )
 244 {
 245         CLIENT *from, *target, *c;
 246         CONN_ID idx, idx2;
 247         char user[CLIENT_USER_LEN];
 248
 249         assert( Client != NULL );
 250         assert( Req != NULL );
 251
 252         /* Bad number of arguments? */
 253         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
 254
 255         /* Search sender */
 256         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 257         else from = Client;
 258         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 259
 260         /* Search target */
 261         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
 262         else target = Client_ThisServer( );
 263
 264         /* Forward command to other server? */
 265         if( target != Client_ThisServer( ))
 266         {
 267                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 268
 269                 /* Send RPL_TRACELINK back to initiator */
 270                 idx = Client_Conn( Client ); assert( idx > NONE );
 271                 idx2 = Client_Conn( Client_NextHop( target )); assert( idx2 > NONE );
 272                 if( ! IRC_WriteStrClient( from, RPL_TRACELINK_MSG, Client_ID( from ), PACKAGE_NAME, PACKAGE_VERSION, Client_ID( target ), Client_ID( Client_NextHop( target )), Option_String( idx2 ), time( NULL ) - Conn_StartTime( idx2 ), Conn_SendQ( idx ), Conn_SendQ( idx2 ))) return DISCONNECTED;
 273
 274                 /* Forward command */
 275                 IRC_WriteStrClientPrefix( target, from, "TRACE %s", Req->argv[0] );
 276                 return CONNECTED;
 277         }
 278
 279         /* Infos about all connected servers */
 280         c = Client_First( );
 281         while( c )
 282         {
 283                 if( Client_Conn( c ) > NONE )
 284                 {
 285                         /* Local client */
 286                         if( Client_Type( c ) == CLIENT_SERVER )
 287                         {
 288                                 /* Server link */
 289                                 strlcpy( user, Client_User( c ), sizeof( user ));
 290                                 if( user[0] == '~' ) strlcpy( user, "unknown", sizeof( user ));
 291                                 if( ! IRC_WriteStrClient( from, RPL_TRACESERVER_MSG, Client_ID( from ), Client_ID( c ), user, Client_Hostname( c ), Client_Mask( Client_ThisServer( )), Option_String( Client_Conn( c )))) return DISCONNECTED;
 292                         }
 293                         if(( Client_Type( c ) == CLIENT_USER ) && ( strchr( Client_Modes( c ), 'o' )))
 294                         {
 295                                 /* IRC Operator */
 296                                 if( ! IRC_WriteStrClient( from, RPL_TRACEOPERATOR_MSG, Client_ID( from ), Client_ID( c ))) return DISCONNECTED;
 297                         }
 298                 }
 299                 c = Client_Next( c );
 300         }
 301
 302         IRC_SetPenalty( Client, 3 );
 303         return IRC_WriteStrClient( from, RPL_TRACEEND_MSG, Client_ID( from ), Conf_ServerName, PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_DebugLevel );
 304 } /* IRC_TRACE */
 305
 306
 307 GLOBAL bool
 308 IRC_HELP( CLIENT *Client, REQUEST *Req )
 309 {
 310         COMMAND *cmd;
 311
 312         assert( Client != NULL );
 313         assert( Req != NULL );
 314
 315         /* Bad number of arguments? */
 316         if( Req->argc > 0 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
 317
 318         cmd = Parse_GetCommandStruct( );
 319         while( cmd->name )
 320         {
 321                 if( ! IRC_WriteStrClient( Client, "NOTICE %s :%s", Client_ID( Client ), cmd->name )) return DISCONNECTED;
 322                 cmd++;
 323         }
 324
 325         IRC_SetPenalty( Client, 2 );
 326         return CONNECTED;
 327 } /* IRC_HELP */
 328
 329
 330 static char *
 331 #ifdef ZLIB
 332 Option_String(CONN_ID Idx)
 333 #else
 334 Option_String(UNUSED CONN_ID Idx)
 335 #endif
 336 {
 337         static char option_txt[8];
 338 #ifdef ZLIB
 339         UINT16 options;
 340
 341         options = Conn_Options(Idx);
 342 #endif
 343
 344         strcpy(option_txt, "F");        /* No idea what this means, but the
 345                                          * original ircd sends it ... */
 346 #ifdef ZLIB
 347         if(options & CONN_ZIP)          /* zlib compression supported. */
 348                 strcat(option_txt, "z");
 349 #endif
 350
 351         return option_txt;
 352 } /* Option_String */
 353
 354
 355 static bool
 356 Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
 357 {
 358         CLIENT *cl, *from;
 359         CL2CHAN *cl2chan;
 360         CHANNEL *chan;
 361         char *currentTarget = Req->argv[0];
 362         char *lastCurrentTarget = NULL;
 363         char *message = NULL;
 364
 365         assert(Client != NULL);
 366         assert(Req != NULL);
 367
 368         if (Req->argc == 0) {
 369                 if (!SendErrors)
 370                         return CONNECTED;
 371                 return IRC_WriteStrClient(Client, ERR_NORECIPIENT_MSG,
 372                                           Client_ID(Client), Req->command);
 373         }
 374         if (Req->argc == 1) {
 375                 if (!SendErrors)
 376                         return CONNECTED;
 377                 return IRC_WriteStrClient(Client, ERR_NOTEXTTOSEND_MSG,
 378                                           Client_ID(Client));
 379         }
 380         if (Req->argc > 2) {
 381                 if (!SendErrors)
 382                         return CONNECTED;
 383                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 384                                           Client_ID(Client), Req->command);
 385         }
 386
 387         if (Client_Type(Client) == CLIENT_SERVER)
 388                 from = Client_Search(Req->prefix);
 389         else
 390                 from = Client;
 391         if (!from)
 392                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 393                                           Client_ID(Client), Req->prefix);
 394
 395 #ifdef ICONV
 396         if (Client_Conn(Client) > NONE)
 397                 message = Conn_EncodingFrom(Client_Conn(Client), Req->argv[1]);
 398         else
 399 #endif
 400                 message = Req->argv[1];
 401
 402         /* handle msgtarget = msgto *("," msgto) */
 403         currentTarget = strtok_r(currentTarget, ",", &lastCurrentTarget);
 404         ngt_UpperStr(Req->command);
 405
 406         while (currentTarget) {
 407                 /* Check for and handle valid <msgto> of form:
 408                  * RFC 2812 2.3.1:
 409                  *   msgto =  channel / ( user [ "%" host ] "@" servername )
 410                  *   msgto =/ ( user "%" host ) / targetmask
 411                  *   msgto =/ nickname / ( nickname "!" user "@" host )
 412                  */
 413                 if (strchr(currentTarget, '!') == NULL)
 414                         /* nickname */
 415                         cl = Client_Search(currentTarget);
 416                 else
 417                         cl = NULL;
 418
 419                 if (cl == NULL) {
 420                         /* If currentTarget isn't a nickname check for:
 421                          * user ["%" host] "@" servername
 422                          * user "%" host
 423                          * nickname "!" user "@" host
 424                          */
 425                         char target[COMMAND_LEN];
 426                         char * nick = NULL;
 427                         char * user = NULL;
 428                         char * host = NULL;
 429                         char * server = NULL;
 430
 431                         strlcpy(target, currentTarget, COMMAND_LEN);
 432                         server = strchr(target, '@');
 433                         if (server) {
 434                                 *server = '\0';
 435                                 server++;
 436                         }
 437                         host = strchr(target, '%');
 438                         if (host) {
 439                                 *host = '\0';
 440                                 host++;
 441                         }
 442                         user = strchr(target, '!');
 443                         if (user) {
 444                                 /* msgto form: nick!user@host */
 445                                 *user = '\0';
 446                                 user++;
 447                                 nick = target;
 448                                 host = server; /* not "@server" but "@host" */
 449                         } else {
 450                                 user = target;
 451                         }
 452
 453                         for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
 454                                 if (Client_Type(cl) != CLIENT_USER &&
 455                                     Client_Type(cl) != CLIENT_SERVICE)
 456                                         continue;
 457                                 if (nick != NULL && host != NULL) {
 458                                         if (strcasecmp(nick, Client_ID(cl)) == 0 &&
 459                                             strcasecmp(user, Client_User(cl)) == 0 &&
 460                                             strcasecmp(host, Client_HostnameCloaked(cl)) == 0)
 461                                                 break;
 462                                         else
 463                                                 continue;
 464                                 }
 465                                 if (strcasecmp(user, Client_User(cl)) != 0)
 466                                         continue;
 467                                 if (host != NULL && strcasecmp(host,
 468                                                 Client_HostnameCloaked(cl)) != 0)
 469                                         continue;
 470                                 if (server != NULL && strcasecmp(server,
 471                                                 Client_ID(Client_Introducer(cl))) != 0)
 472                                         continue;
 473                                 break;
 474                         }
 475                 }
 476
 477                 if (cl) {
 478                         /* Target is a user, enforce type */
 479 #ifndef STRICT_RFC
 480                         if (Client_Type(cl) != ForceType &&
 481                             !(ForceType == CLIENT_USER &&
 482                               (Client_Type(cl) == CLIENT_USER ||
 483                                Client_Type(cl) == CLIENT_SERVICE))) {
 484 #else
 485                         if (Client_Type(cl) != ForceType) {
 486 #endif
 487                                 if (SendErrors && !IRC_WriteStrClient(
 488                                     from, ERR_NOSUCHNICK_MSG,Client_ID(from),
 489                                     currentTarget))
 490                                         return DISCONNECTED;
 491                                 goto send_next_target;
 492                         }
 493
 494 #ifndef STRICT_RFC
 495                         if (ForceType == CLIENT_SERVICE &&
 496                             (Conn_Options(Client_Conn(Client_NextHop(cl)))
 497                              & CONN_RFC1459)) {
 498                                 /* SQUERY command but RFC 1459 link: convert
 499                                  * request to PRIVMSG command */
 500                                 Req->command = "PRIVMSG";
 501                         }
 502 #endif
 503                         if (Client_HasMode(cl, 'b') &&
 504                             !Client_HasMode(from, 'R') &&
 505                             !Client_HasMode(from, 'o') &&
 506                             !(Client_Type(from) == CLIENT_SERVER) &&
 507                             !(Client_Type(from) == CLIENT_SERVICE)) {
 508                                 if (SendErrors && !IRC_WriteStrClient(from,
 509                                                 ERR_CANNOTSENDTONICK_MSG,
 510                                                 Client_ID(from), Client_ID(cl)))
 511                                         return DISCONNECTED;
 512                                 goto send_next_target;
 513                         }
 514
 515                         if (Client_HasMode(cl, 'C')) {
 516                                 cl2chan = Channel_FirstChannelOf(cl);
 517                                 while (cl2chan) {
 518                                         chan = Channel_GetChannel(cl2chan);
 519                                         if (Channel_IsMemberOf(chan, from))
 520                                                 break;
 521                                         cl2chan = Channel_NextChannelOf(cl, cl2chan);
 522                                 }
 523                                 if (!cl2chan) {
 524                                         if (SendErrors && !IRC_WriteStrClient(
 525                                             from, ERR_NOTONSAMECHANNEL_MSG,
 526                                             Client_ID(from), Client_ID(cl)))
 527                                                 return DISCONNECTED;
 528                                         goto send_next_target;
 529                                 }
 530                         }
 531
 532                         if (SendErrors && (Client_Type(Client) != CLIENT_SERVER)
 533                             && strchr(Client_Modes(cl), 'a')) {
 534                                 /* Target is away */
 535                                 if (!IRC_WriteStrClient(from, RPL_AWAY_MSG,
 536                                                         Client_ID(from),
 537                                                         Client_ID(cl),
 538                                                         Client_Away(cl)))
 539                                         return DISCONNECTED;
 540                         }
 541                         if (Client_Conn(from) > NONE) {
 542                                 Conn_UpdateIdle(Client_Conn(from));
 543                         }
 544                         if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
 545                                                       Req->command, Client_ID(cl),
 546                                                       message))
 547                                 return DISCONNECTED;
 548                 } else if (ForceType != CLIENT_SERVICE
 549                            && (chan = Channel_Search(currentTarget))) {
 550                         if (!Channel_Write(chan, from, Client, Req->command,
 551                                            SendErrors, message))
 552                                         return DISCONNECTED;
 553                 } else if (ForceType != CLIENT_SERVICE
 554                         /* $#: server/target mask, RFC 2812, sec. 3.3.1 */
 555                            && strchr("$#", currentTarget[0])
 556                            && strchr(currentTarget, '.')) {
 557                         /* targetmask */
 558                         if (!Send_Message_Mask(from, Req->command, currentTarget,
 559                                                message, SendErrors))
 560                                 return DISCONNECTED;
 561                 } else {
 562                         if (!SendErrors)
 563                                 return CONNECTED;
 564                         if (!IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG,
 565                                                 Client_ID(from), currentTarget))
 566                                 return DISCONNECTED;
 567                 }
 568
 569         send_next_target:
 570                 currentTarget = strtok_r(NULL, ",", &lastCurrentTarget);
 571                 if (currentTarget)
 572                         Conn_SetPenalty(Client_Conn(Client), 1);
 573         }
 574
 575         return CONNECTED;
 576 } /* Send_Message */
 577
 578
 579 static bool
 580 Send_Message_Mask(CLIENT * from, char * command, char * targetMask,
 581                   char * message, bool SendErrors)
 582 {
 583         CLIENT *cl;
 584         bool client_match;
 585         char *mask = targetMask + 1;
 586         const char *check_wildcards;
 587
 588         cl = NULL;
 589
 590         if (strchr(Client_Modes(from), 'o') == NULL) {
 591                 if (!SendErrors)
 592                         return true;
 593                 return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
 594                                           Client_ID(from));
 595         }
 596
 597         /*
 598          * RFC 2812, sec. 3.3.1 requires that targetMask have at least one
 599          * dot (".") and no wildcards ("*", "?") following the last one.
 600          */
 601         check_wildcards = strrchr(targetMask, '.');
 602         assert(check_wildcards != NULL);
 603         if (check_wildcards &&
 604                 check_wildcards[strcspn(check_wildcards, "*?")])
 605         {
 606                 if (!SendErrors)
 607                         return true;
 608                 return IRC_WriteStrClient(from, ERR_WILDTOPLEVEL, targetMask);
 609         }
 610
 611         /* #: hostmask, see RFC 2812, sec. 3.3.1 */
 612         if (targetMask[0] == '#') {
 613                 for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
 614                         if (Client_Type(cl) != CLIENT_USER)
 615                                 continue;
 616                         client_match = MatchCaseInsensitive(mask, Client_Hostname(cl));
 617                         if (client_match)
 618                                 if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
 619                                                 command, Client_ID(cl), message))
 620                                         return false;
 621                 }
 622         } else {
 623                 assert(targetMask[0] == '$'); /* $: server mask, see RFC 2812, sec. 3.3.1 */
 624                 for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
 625                         if (Client_Type(cl) != CLIENT_USER)
 626                                 continue;
 627                         client_match = MatchCaseInsensitive(mask,
 628                                         Client_ID(Client_Introducer(cl)));
 629                         if (client_match)
 630                                 if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
 631                                                 command, Client_ID(cl), message))
 632                                         return false;
 633                 }
 634         }
 635         return CONNECTED;
 636 } /* Send_Message_Mask */
 637
 638
 639 /* -eof- */