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 /**
 308  * Handler for the IRC "HELP" command.
 309  *
 310  * @param Client The client from which this command has been received.
 311  * @param Req Request structure with prefix and all parameters.
 312  * @return CONNECTED or DISCONNECTED.
 313  */
 314 GLOBAL bool
 315 IRC_HELP(CLIENT *Client, REQUEST *Req)
 316 {
 317         COMMAND *cmd;
 318
 319         assert(Client != NULL);
 320         assert(Req != NULL);
 321
 322         /* Bad number of arguments? */
 323         if (Req->argc > 0)
 324                 return IRC_WriteStrClient(Client, ERR_NORECIPIENT_MSG,
 325                                           Client_ID(Client), Req->command);
 326
 327         cmd = Parse_GetCommandStruct();
 328         while(cmd->name) {
 329                 if (!IRC_WriteStrClient(Client, "NOTICE %s :%s",
 330                                         Client_ID(Client), cmd->name))
 331                         return DISCONNECTED;
 332                 cmd++;
 333         }
 334
 335         IRC_SetPenalty(Client, 2);
 336         return CONNECTED;
 337 } /* IRC_HELP */
 338
 339
 340 static char *
 341 #ifdef ZLIB
 342 Option_String(CONN_ID Idx)
 343 #else
 344 Option_String(UNUSED CONN_ID Idx)
 345 #endif
 346 {
 347         static char option_txt[8];
 348 #ifdef ZLIB
 349         UINT16 options;
 350
 351         options = Conn_Options(Idx);
 352 #endif
 353
 354         strcpy(option_txt, "F");        /* No idea what this means, but the
 355                                          * original ircd sends it ... */
 356 #ifdef ZLIB
 357         if(options & CONN_ZIP)          /* zlib compression supported. */
 358                 strcat(option_txt, "z");
 359 #endif
 360
 361         return option_txt;
 362 } /* Option_String */
 363
 364
 365 static bool
 366 Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
 367 {
 368         CLIENT *cl, *from;
 369         CL2CHAN *cl2chan;
 370         CHANNEL *chan;
 371         char *currentTarget = Req->argv[0];
 372         char *lastCurrentTarget = NULL;
 373         char *message = NULL;
 374
 375         assert(Client != NULL);
 376         assert(Req != NULL);
 377
 378         if (Req->argc == 0) {
 379                 if (!SendErrors)
 380                         return CONNECTED;
 381                 return IRC_WriteStrClient(Client, ERR_NORECIPIENT_MSG,
 382                                           Client_ID(Client), Req->command);
 383         }
 384         if (Req->argc == 1) {
 385                 if (!SendErrors)
 386                         return CONNECTED;
 387                 return IRC_WriteStrClient(Client, ERR_NOTEXTTOSEND_MSG,
 388                                           Client_ID(Client));
 389         }
 390         if (Req->argc > 2) {
 391                 if (!SendErrors)
 392                         return CONNECTED;
 393                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 394                                           Client_ID(Client), Req->command);
 395         }
 396
 397         if (Client_Type(Client) == CLIENT_SERVER)
 398                 from = Client_Search(Req->prefix);
 399         else
 400                 from = Client;
 401         if (!from)
 402                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 403                                           Client_ID(Client), Req->prefix);
 404
 405 #ifdef ICONV
 406         if (Client_Conn(Client) > NONE)
 407                 message = Conn_EncodingFrom(Client_Conn(Client), Req->argv[1]);
 408         else
 409 #endif
 410                 message = Req->argv[1];
 411
 412         /* handle msgtarget = msgto *("," msgto) */
 413         currentTarget = strtok_r(currentTarget, ",", &lastCurrentTarget);
 414         ngt_UpperStr(Req->command);
 415
 416         while (currentTarget) {
 417                 /* Check for and handle valid <msgto> of form:
 418                  * RFC 2812 2.3.1:
 419                  *   msgto =  channel / ( user [ "%" host ] "@" servername )
 420                  *   msgto =/ ( user "%" host ) / targetmask
 421                  *   msgto =/ nickname / ( nickname "!" user "@" host )
 422                  */
 423                 if (strchr(currentTarget, '!') == NULL)
 424                         /* nickname */
 425                         cl = Client_Search(currentTarget);
 426                 else
 427                         cl = NULL;
 428
 429                 if (cl == NULL) {
 430                         /* If currentTarget isn't a nickname check for:
 431                          * user ["%" host] "@" servername
 432                          * user "%" host
 433                          * nickname "!" user "@" host
 434                          */
 435                         char target[COMMAND_LEN];
 436                         char * nick = NULL;
 437                         char * user = NULL;
 438                         char * host = NULL;
 439                         char * server = NULL;
 440
 441                         strlcpy(target, currentTarget, COMMAND_LEN);
 442                         server = strchr(target, '@');
 443                         if (server) {
 444                                 *server = '\0';
 445                                 server++;
 446                         }
 447                         host = strchr(target, '%');
 448                         if (host) {
 449                                 *host = '\0';
 450                                 host++;
 451                         }
 452                         user = strchr(target, '!');
 453                         if (user) {
 454                                 /* msgto form: nick!user@host */
 455                                 *user = '\0';
 456                                 user++;
 457                                 nick = target;
 458                                 host = server; /* not "@server" but "@host" */
 459                         } else {
 460                                 user = target;
 461                         }
 462
 463                         for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
 464                                 if (Client_Type(cl) != CLIENT_USER &&
 465                                     Client_Type(cl) != CLIENT_SERVICE)
 466                                         continue;
 467                                 if (nick != NULL && host != NULL) {
 468                                         if (strcasecmp(nick, Client_ID(cl)) == 0 &&
 469                                             strcasecmp(user, Client_User(cl)) == 0 &&
 470                                             strcasecmp(host, Client_HostnameDisplayed(cl)) == 0)
 471                                                 break;
 472                                         else
 473                                                 continue;
 474                                 }
 475                                 if (strcasecmp(user, Client_User(cl)) != 0)
 476                                         continue;
 477                                 if (host != NULL && strcasecmp(host,
 478                                                 Client_HostnameDisplayed(cl)) != 0)
 479                                         continue;
 480                                 if (server != NULL && strcasecmp(server,
 481                                                 Client_ID(Client_Introducer(cl))) != 0)
 482                                         continue;
 483                                 break;
 484                         }
 485                 }
 486
 487                 if (cl) {
 488                         /* Target is a user, enforce type */
 489 #ifndef STRICT_RFC
 490                         if (Client_Type(cl) != ForceType &&
 491                             !(ForceType == CLIENT_USER &&
 492                               (Client_Type(cl) == CLIENT_USER ||
 493                                Client_Type(cl) == CLIENT_SERVICE))) {
 494 #else
 495                         if (Client_Type(cl) != ForceType) {
 496 #endif
 497                                 if (SendErrors && !IRC_WriteStrClient(
 498                                     from, ERR_NOSUCHNICK_MSG,Client_ID(from),
 499                                     currentTarget))
 500                                         return DISCONNECTED;
 501                                 goto send_next_target;
 502                         }
 503
 504 #ifndef STRICT_RFC
 505                         if (ForceType == CLIENT_SERVICE &&
 506                             (Conn_Options(Client_Conn(Client_NextHop(cl)))
 507                              & CONN_RFC1459)) {
 508                                 /* SQUERY command but RFC 1459 link: convert
 509                                  * request to PRIVMSG command */
 510                                 Req->command = "PRIVMSG";
 511                         }
 512 #endif
 513                         if (Client_HasMode(cl, 'b') &&
 514                             !Client_HasMode(from, 'R') &&
 515                             !Client_HasMode(from, 'o') &&
 516                             !(Client_Type(from) == CLIENT_SERVER) &&
 517                             !(Client_Type(from) == CLIENT_SERVICE)) {
 518                                 if (SendErrors && !IRC_WriteStrClient(from,
 519                                                 ERR_NONONREG_MSG,
 520                                                 Client_ID(from), Client_ID(cl)))
 521                                         return DISCONNECTED;
 522                                 goto send_next_target;
 523                         }
 524
 525                         if (Client_HasMode(cl, 'C')) {
 526                                 cl2chan = Channel_FirstChannelOf(cl);
 527                                 while (cl2chan) {
 528                                         chan = Channel_GetChannel(cl2chan);
 529                                         if (Channel_IsMemberOf(chan, from))
 530                                                 break;
 531                                         cl2chan = Channel_NextChannelOf(cl, cl2chan);
 532                                 }
 533                                 if (!cl2chan) {
 534                                         if (SendErrors && !IRC_WriteStrClient(
 535                                             from, ERR_NOTONSAMECHANNEL_MSG,
 536                                             Client_ID(from), Client_ID(cl)))
 537                                                 return DISCONNECTED;
 538                                         goto send_next_target;
 539                                 }
 540                         }
 541
 542                         if (SendErrors && (Client_Type(Client) != CLIENT_SERVER)
 543                             && strchr(Client_Modes(cl), 'a')) {
 544                                 /* Target is away */
 545                                 if (!IRC_WriteStrClient(from, RPL_AWAY_MSG,
 546                                                         Client_ID(from),
 547                                                         Client_ID(cl),
 548                                                         Client_Away(cl)))
 549                                         return DISCONNECTED;
 550                         }
 551                         if (Client_Conn(from) > NONE) {
 552                                 Conn_UpdateIdle(Client_Conn(from));
 553                         }
 554                         if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
 555                                                       Req->command, Client_ID(cl),
 556                                                       message))
 557                                 return DISCONNECTED;
 558                 } else if (ForceType != CLIENT_SERVICE
 559                            && (chan = Channel_Search(currentTarget))) {
 560                         if (!Channel_Write(chan, from, Client, Req->command,
 561                                            SendErrors, message))
 562                                         return DISCONNECTED;
 563                 } else if (ForceType != CLIENT_SERVICE
 564                         /* $#: server/target mask, RFC 2812, sec. 3.3.1 */
 565                            && strchr("$#", currentTarget[0])
 566                            && strchr(currentTarget, '.')) {
 567                         /* targetmask */
 568                         if (!Send_Message_Mask(from, Req->command, currentTarget,
 569                                                message, SendErrors))
 570                                 return DISCONNECTED;
 571                 } else {
 572                         if (!SendErrors)
 573                                 return CONNECTED;
 574                         if (!IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG,
 575                                                 Client_ID(from), currentTarget))
 576                                 return DISCONNECTED;
 577                 }
 578
 579         send_next_target:
 580                 currentTarget = strtok_r(NULL, ",", &lastCurrentTarget);
 581                 if (currentTarget)
 582                         Conn_SetPenalty(Client_Conn(Client), 1);
 583         }
 584
 585         return CONNECTED;
 586 } /* Send_Message */
 587
 588
 589 static bool
 590 Send_Message_Mask(CLIENT * from, char * command, char * targetMask,
 591                   char * message, bool SendErrors)
 592 {
 593         CLIENT *cl;
 594         bool client_match;
 595         char *mask = targetMask + 1;
 596         const char *check_wildcards;
 597
 598         cl = NULL;
 599
 600         if (strchr(Client_Modes(from), 'o') == NULL) {
 601                 if (!SendErrors)
 602                         return true;
 603                 return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
 604                                           Client_ID(from));
 605         }
 606
 607         /*
 608          * RFC 2812, sec. 3.3.1 requires that targetMask have at least one
 609          * dot (".") and no wildcards ("*", "?") following the last one.
 610          */
 611         check_wildcards = strrchr(targetMask, '.');
 612         assert(check_wildcards != NULL);
 613         if (check_wildcards &&
 614                 check_wildcards[strcspn(check_wildcards, "*?")])
 615         {
 616                 if (!SendErrors)
 617                         return true;
 618                 return IRC_WriteStrClient(from, ERR_WILDTOPLEVEL, targetMask);
 619         }
 620
 621         /* #: hostmask, see RFC 2812, sec. 3.3.1 */
 622         if (targetMask[0] == '#') {
 623                 for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
 624                         if (Client_Type(cl) != CLIENT_USER)
 625                                 continue;
 626                         client_match = MatchCaseInsensitive(mask, Client_Hostname(cl));
 627                         if (client_match)
 628                                 if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
 629                                                 command, Client_ID(cl), message))
 630                                         return false;
 631                 }
 632         } else {
 633                 assert(targetMask[0] == '$'); /* $: server mask, see RFC 2812, sec. 3.3.1 */
 634                 for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
 635                         if (Client_Type(cl) != CLIENT_USER)
 636                                 continue;
 637                         client_match = MatchCaseInsensitive(mask,
 638                                         Client_ID(Client_Introducer(cl)));
 639                         if (client_match)
 640                                 if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
 641                                                 command, Client_ID(cl), message))
 642                                         return false;
 643                 }
 644         }
 645         return CONNECTED;
 646 } /* Send_Message_Mask */
 647
 648
 649 /* -eof- */