src/ngircd/irc-info.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2011 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 info commands
  17  */
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <errno.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <strings.h>
  26
  27 #include "ngircd.h"
  28 #include "conn-func.h"
  29 #include "conn-zip.h"
  30 #include "channel.h"
  31 #include "conf.h"
  32 #include "defines.h"
  33 #include "log.h"
  34 #include "messages.h"
  35 #include "match.h"
  36 #include "tool.h"
  37 #include "parse.h"
  38 #include "irc-write.h"
  39
  40 #include "exp.h"
  41 #include "irc-info.h"
  42
  43
  44 GLOBAL bool
  45 IRC_ADMIN(CLIENT *Client, REQUEST *Req )
  46 {
  47         CLIENT *target, *prefix;
  48
  49         assert( Client != NULL );
  50         assert( Req != NULL );
  51
  52         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  53
  54         /* find target ... */
  55         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
  56         else target = Client_ThisServer( );
  57
  58         /* find Prefix */
  59         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
  60         else prefix = Client;
  61         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  62
  63         /* forwad message to another server? */
  64         if( target != Client_ThisServer( ))
  65         {
  66                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
  67
  68                 /* forward */
  69                 IRC_WriteStrClientPrefix( target, prefix, "ADMIN %s", Req->argv[0] );
  70                 return CONNECTED;
  71         }
  72
  73         /* mit Versionsinfo antworten */
  74         if( ! IRC_WriteStrClient( Client, RPL_ADMINME_MSG, Client_ID( prefix ), Conf_ServerName )) return DISCONNECTED;
  75         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC1_MSG, Client_ID( prefix ), Conf_ServerAdmin1 )) return DISCONNECTED;
  76         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC2_MSG, Client_ID( prefix ), Conf_ServerAdmin2 )) return DISCONNECTED;
  77         if( ! IRC_WriteStrClient( Client, RPL_ADMINEMAIL_MSG, Client_ID( prefix ), Conf_ServerAdminMail )) return DISCONNECTED;
  78
  79         IRC_SetPenalty( Client, 1 );
  80         return CONNECTED;
  81 } /* IRC_ADMIN */
  82
  83
  84 /**
  85  * Handler for the IRC command "INFO".
  86  * See RFC 2812 section 3.4.10.
  87  */
  88 GLOBAL bool
  89 IRC_INFO(CLIENT * Client, REQUEST * Req)
  90 {
  91         CLIENT *target, *prefix;
  92         char msg[510];
  93
  94         assert(Client != NULL);
  95         assert(Req != NULL);
  96
  97         /* Wrong number of parameters? */
  98         if (Req->argc > 1)
  99                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 100                                           Client_ID(Client), Req->command);
 101
 102         /* Determine prefix */
 103         if (Client_Type(Client) == CLIENT_SERVER)
 104                 prefix = Client_Search(Req->prefix);
 105         else
 106                 prefix = Client;
 107         if (!prefix)
 108                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 109                                           Client_ID(Client), Req->prefix);
 110
 111         /* Look for a target */
 112         if (Req->argc > 0)
 113                 target = Client_Search(Req->argv[0]);
 114         else
 115                 target = Client_ThisServer();
 116
 117         /* Make sure that the target is a server */
 118         if (target && Client_Type(target) != CLIENT_SERVER)
 119                 target = Client_Introducer(target);
 120
 121         if (!target)
 122                 return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
 123                                           Client_ID(prefix), Req->argv[0]);
 124
 125         /* Pass on to another server? */
 126         if (target != Client_ThisServer()) {
 127                 IRC_WriteStrClientPrefix(target, prefix, "INFO %s",
 128                                          Req->argv[0]);
 129                 return CONNECTED;
 130         }
 131
 132         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix),
 133                                 NGIRCd_Version))
 134                 return DISCONNECTED;
 135
 136 #if defined(__DATE__) && defined(__TIME__)
 137         snprintf(msg, sizeof(msg), "Birth Date: %s at %s", __DATE__, __TIME__);
 138         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 139                 return DISCONNECTED;
 140 #endif
 141
 142         strlcpy(msg, "On-line since ", sizeof(msg));
 143         strlcat(msg, NGIRCd_StartStr, sizeof(msg));
 144         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 145                 return DISCONNECTED;
 146
 147         if (!IRC_WriteStrClient(Client, RPL_ENDOFINFO_MSG, Client_ID(prefix)))
 148                 return DISCONNECTED;
 149
 150         IRC_SetPenalty(Client, 2);
 151         return CONNECTED;
 152 } /* IRC_INFO */
 153
 154
 155 GLOBAL bool
 156 IRC_ISON( CLIENT *Client, REQUEST *Req )
 157 {
 158         char rpl[COMMAND_LEN];
 159         CLIENT *c;
 160         char *ptr;
 161         int i;
 162
 163         assert( Client != NULL );
 164         assert( Req != NULL );
 165
 166         /* Falsche Anzahl Parameter? */
 167         if(( Req->argc < 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 168
 169         strlcpy( rpl, RPL_ISON_MSG, sizeof rpl );
 170         for( i = 0; i < Req->argc; i++ )
 171         {
 172                 ptr = strtok( Req->argv[i], " " );
 173                 while( ptr )
 174                 {
 175                         ngt_TrimStr( ptr );
 176                         c = Client_Search( ptr );
 177                         if( c && ( Client_Type( c ) == CLIENT_USER ))
 178                         {
 179                                 /* Dieser Nick ist "online" */
 180                                 strlcat( rpl, ptr, sizeof( rpl ));
 181                                 strlcat( rpl, " ", sizeof( rpl ));
 182                         }
 183                         ptr = strtok( NULL, " " );
 184                 }
 185         }
 186         ngt_TrimLastChr(rpl, ' ');
 187
 188         return IRC_WriteStrClient( Client, rpl, Client_ID( Client ) );
 189 } /* IRC_ISON */
 190
 191
 192 GLOBAL bool
 193 IRC_LINKS( CLIENT *Client, REQUEST *Req )
 194 {
 195         CLIENT *target, *from, *c;
 196         char *mask;
 197
 198         assert( Client != NULL );
 199         assert( Req != NULL );
 200
 201         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 202
 203         /* Server-Mask ermitteln */
 204         if( Req->argc > 0 ) mask = Req->argv[Req->argc - 1];
 205         else mask = "*";
 206
 207         /* Absender ermitteln */
 208         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 209         else from = Client;
 210         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 211
 212         /* An anderen Server forwarden? */
 213         if( Req->argc == 2 )
 214         {
 215                 target = Client_Search( Req->argv[0] );
 216                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 217                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LINKS %s %s", Req->argv[0], Req->argv[1] );
 218         }
 219
 220         /* Wer ist der Absender? */
 221         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 222         else target = Client;
 223         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 224
 225         c = Client_First( );
 226         while( c )
 227         {
 228                 if( Client_Type( c ) == CLIENT_SERVER )
 229                 {
 230                         if( ! IRC_WriteStrClient( target, RPL_LINKS_MSG, Client_ID( target ), Client_ID( c ), Client_ID( Client_TopServer( c ) ? Client_TopServer( c ) : Client_ThisServer( )), Client_Hops( c ), Client_Info( c ))) return DISCONNECTED;
 231                 }
 232                 c = Client_Next( c );
 233         }
 234
 235         IRC_SetPenalty( target, 1 );
 236         return IRC_WriteStrClient( target, RPL_ENDOFLINKS_MSG, Client_ID( target ), mask );
 237 } /* IRC_LINKS */
 238
 239
 240 GLOBAL bool
 241 IRC_LUSERS( CLIENT *Client, REQUEST *Req )
 242 {
 243         CLIENT *target, *from;
 244
 245         assert( Client != NULL );
 246         assert( Req != NULL );
 247
 248         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 249
 250         /* Absender ermitteln */
 251         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 252         else from = Client;
 253         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 254
 255         /* An anderen Server forwarden? */
 256         if( Req->argc == 2 )
 257         {
 258                 target = Client_Search( Req->argv[1] );
 259                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 260                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LUSERS %s %s", Req->argv[0], Req->argv[1] );
 261         }
 262
 263         /* Wer ist der Absender? */
 264         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 265         else target = Client;
 266         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 267
 268         IRC_Send_LUSERS( target );
 269
 270         IRC_SetPenalty( target, 1 );
 271         return CONNECTED;
 272 } /* IRC_LUSERS */
 273
 274
 275 /**
 276  * Handler for the IRC command "SERVLIST".
 277  * List registered services, see RFC 2811, section 3.5.1: the syntax is
 278  * "SERVLIST [<mask> [<type>]]".
 279  */
 280 GLOBAL bool
 281 IRC_SERVLIST(CLIENT *Client, REQUEST *Req)
 282 {
 283         CLIENT *c;
 284
 285         assert(Client != NULL);
 286         assert(Req != NULL);
 287
 288         if (Req->argc > 2)
 289                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 290                                           Client_ID(Client), Req->command);
 291
 292         if (Req->argc < 2 || strcmp(Req->argv[1], "0") == 0) {
 293                 for (c = Client_First(); c!= NULL; c = Client_Next(c)) {
 294                         if (Client_Type(c) != CLIENT_SERVICE)
 295                                 continue;
 296                         if (Req->argc > 0 && !MatchCaseInsensitive(Req->argv[0],
 297                                                                   Client_ID(c)))
 298                                 continue;
 299                         if (!IRC_WriteStrClient(Client, RPL_SERVLIST_MSG,
 300                                         Client_ID(Client), Client_Mask(c),
 301                                         Client_Mask(Client_Introducer(c)), "*",
 302                                         0, Client_Hops(c), Client_Info(c)))
 303                                 return DISCONNECTED;
 304                 }
 305         }
 306
 307         return IRC_WriteStrClient(Client, RPL_SERVLISTEND_MSG, Client_ID(Client),
 308                                   Req->argc > 0 ? Req->argv[0] : "*",
 309                                   Req->argc > 1 ? Req->argv[1] : "0");
 310 } /* IRC_SERVLIST */
 311
 312
 313 GLOBAL bool
 314 IRC_MOTD( CLIENT *Client, REQUEST *Req )
 315 {
 316         CLIENT *from, *target;
 317
 318         assert( Client != NULL );
 319         assert( Req != NULL );
 320
 321         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 322
 323         /* From aus Prefix ermitteln */
 324         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 325         else from = Client;
 326         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 327
 328         if( Req->argc == 1 )
 329         {
 330                 /* forward? */
 331                 target = Client_Search( Req->argv[0] );
 332                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 333
 334                 if( target != Client_ThisServer( ))
 335                 {
 336                         /* Ok, anderer Server ist das Ziel: forwarden */
 337                         return IRC_WriteStrClientPrefix( target, from, "MOTD %s", Req->argv[0] );
 338                 }
 339         }
 340
 341         IRC_SetPenalty( from, 3 );
 342         return IRC_Show_MOTD( from );
 343 } /* IRC_MOTD */
 344
 345
 346 GLOBAL bool
 347 IRC_NAMES( CLIENT *Client, REQUEST *Req )
 348 {
 349         char rpl[COMMAND_LEN], *ptr;
 350         CLIENT *target, *from, *c;
 351         CHANNEL *chan;
 352
 353         assert( Client != NULL );
 354         assert( Req != NULL );
 355
 356         if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 357
 358         /* use prefix to determine "From" */
 359         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 360         else from = Client;
 361         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 362
 363         if( Req->argc == 2 )
 364         {
 365                 /* forward to another server? */
 366                 target = Client_Search( Req->argv[1] );
 367                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 368
 369                 if( target != Client_ThisServer( )) {
 370                         /* target is another server, forward */
 371                         return IRC_WriteStrClientPrefix( target, from, "NAMES %s :%s", Req->argv[0], Req->argv[1] );
 372                 }
 373         }
 374
 375         if( Req->argc > 0 )
 376         {
 377                 /* bestimmte Channels durchgehen */
 378                 ptr = strtok( Req->argv[0], "," );
 379                 while( ptr )
 380                 {
 381                         chan = Channel_Search( ptr );
 382                         if( chan )
 383                         {
 384                                 /* print name */
 385                                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 386                         }
 387                         if( ! IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), ptr )) return DISCONNECTED;
 388
 389                         /* get next channel name */
 390                         ptr = strtok( NULL, "," );
 391                 }
 392                 return CONNECTED;
 393         }
 394
 395         chan = Channel_First( );
 396         while( chan )
 397         {
 398                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 399
 400                 chan = Channel_Next( chan );
 401         }
 402
 403         /* Now print all clients which are not in any channel */
 404         c = Client_First( );
 405         snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 406         while( c )
 407         {
 408                 if(( Client_Type( c ) == CLIENT_USER ) && ( Channel_FirstChannelOf( c ) == NULL ) && ( ! strchr( Client_Modes( c ), 'i' )))
 409                 {
 410                         /* its a user, concatenate ... */
 411                         if( rpl[strlen( rpl ) - 1] != ':' ) strlcat( rpl, " ", sizeof( rpl ));
 412                         strlcat( rpl, Client_ID( c ), sizeof( rpl ));
 413
 414                         if( strlen( rpl ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
 415                         {
 416                                 /* Line is gwoing too long, send now */
 417                                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 418                                 snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 419                         }
 420                 }
 421
 422                 c = Client_Next( c );
 423         }
 424         if( rpl[strlen( rpl ) - 1] != ':')
 425         {
 426                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 427         }
 428
 429         IRC_SetPenalty( from, 1 );
 430         return IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), "*" );
 431 } /* IRC_NAMES */
 432
 433
 434 static unsigned int
 435 t_diff(time_t *t, const time_t d)
 436 {
 437         time_t diff, remain;
 438
 439         diff = *t / d;
 440         remain = diff * d;
 441         *t -= remain;
 442
 443         return (unsigned int)diff;
 444 }
 445
 446
 447 static unsigned int
 448 uptime_days(time_t *now)
 449 {
 450         return t_diff(now, 60 * 60 * 24);
 451 }
 452
 453
 454 static unsigned int
 455 uptime_hrs(time_t *now)
 456 {
 457         return t_diff(now, 60 * 60);
 458 }
 459
 460
 461 static unsigned int
 462 uptime_mins(time_t *now)
 463 {
 464          return t_diff(now, 60);
 465 }
 466
 467
 468 /**
 469  * Handler for the IRC command "STATS".
 470  * See RFC 2812 section 3.4.4.
 471  */
 472 GLOBAL bool
 473 IRC_STATS( CLIENT *Client, REQUEST *Req )
 474 {
 475         CLIENT *from, *target, *cl;
 476         CONN_ID con;
 477         char query;
 478         COMMAND *cmd;
 479         time_t time_now;
 480         unsigned int days, hrs, mins;
 481
 482         assert(Client != NULL);
 483         assert(Req != NULL);
 484
 485         if (Req->argc > 2)
 486                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 487                                           Client_ID(Client), Req->command);
 488
 489         /* use prefix to determine "From" */
 490         if (Client_Type(Client) == CLIENT_SERVER)
 491                 from = Client_Search(Req->prefix);
 492         else
 493                 from = Client;
 494
 495         if (!from)
 496                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 497                                           Client_ID(Client), Req->prefix);
 498
 499         if (Req->argc == 2) {
 500                 /* forward to another server? */
 501                 target = Client_Search(Req->argv[1]);
 502                 if ((!target) || (Client_Type(target) != CLIENT_SERVER))
 503                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 504                                                  Client_ID(from), Req->argv[1]);
 505
 506                 if (target != Client_ThisServer()) {
 507                         /* forward to another server */
 508                         return IRC_WriteStrClientPrefix(target, from,
 509                                      "STATS %s %s", Req->argv[0], Req->argv[1]);
 510                 }
 511         }
 512
 513         if (Req->argc > 0)
 514                 query = Req->argv[0][0] ? Req->argv[0][0] : '*';
 515         else
 516                 query = '*';
 517
 518         switch (query) {
 519         case 'l':       /* Link status (servers and own link) */
 520         case 'L':
 521                 time_now = time(NULL);
 522                 for (con = Conn_First(); con != NONE; con = Conn_Next(con)) {
 523                         cl = Conn_GetClient(con);
 524                         if (!cl)
 525                                 continue;
 526                         if ((Client_Type(cl) == CLIENT_SERVER)
 527                             || (cl == Client)) {
 528                                 /* Server link or our own connection */
 529 #ifdef ZLIB
 530                                 if (Conn_Options(con) & CONN_ZIP) {
 531                                         if (!IRC_WriteStrClient
 532                                             (from, RPL_STATSLINKINFOZIP_MSG,
 533                                              Client_ID(from), Client_Mask(cl),
 534                                              Conn_SendQ(con), Conn_SendMsg(con),
 535                                              Zip_SendBytes(con),
 536                                              Conn_SendBytes(con),
 537                                              Conn_RecvMsg(con),
 538                                              Zip_RecvBytes(con),
 539                                              Conn_RecvBytes(con),
 540                                              (long)(time_now - Conn_StartTime(con))))
 541                                                 return DISCONNECTED;
 542                                         continue;
 543                                 }
 544 #endif
 545                                 if (!IRC_WriteStrClient
 546                                     (from, RPL_STATSLINKINFO_MSG,
 547                                      Client_ID(from), Client_Mask(cl),
 548                                      Conn_SendQ(con), Conn_SendMsg(con),
 549                                      Conn_SendBytes(con), Conn_RecvMsg(con),
 550                                      Conn_RecvBytes(con),
 551                                      (long)(time_now - Conn_StartTime(con))))
 552                                         return DISCONNECTED;
 553                         }
 554                 }
 555                 break;
 556         case 'm':       /* IRC command status (usage count) */
 557         case 'M':
 558                 cmd = Parse_GetCommandStruct();
 559                 for (; cmd->name; cmd++) {
 560                         if (cmd->lcount == 0 && cmd->rcount == 0)
 561                                 continue;
 562                         if (!IRC_WriteStrClient
 563                             (from, RPL_STATSCOMMANDS_MSG, Client_ID(from),
 564                              cmd->name, cmd->lcount, cmd->bytes, cmd->rcount))
 565                                 return DISCONNECTED;
 566                 }
 567                 break;
 568         case 'u':       /* Server uptime */
 569         case 'U':
 570                 time_now = time(NULL) - NGIRCd_Start;
 571                 days = uptime_days(&time_now);
 572                 hrs = uptime_hrs(&time_now);
 573                 mins = uptime_mins(&time_now);
 574                 if (!IRC_WriteStrClient(from, RPL_STATSUPTIME, Client_ID(from),
 575                                        days, hrs, mins, (unsigned int)time_now))
 576                         return DISCONNECTED;
 577                 break;
 578         }
 579
 580         IRC_SetPenalty(from, 2);
 581         return IRC_WriteStrClient(from, RPL_ENDOFSTATS_MSG,
 582                                   Client_ID(from), query);
 583 } /* IRC_STATS */
 584
 585
 586 /**
 587  * Handler for the IRC command "SUMMON".
 588  * See RFC 2812 section 4.5. ngIRCd doesn't implement this functionality and
 589  * therefore answers with ERR_SUMMONDISABLED.
 590  */
 591 GLOBAL bool
 592 IRC_SUMMON(CLIENT * Client, REQUEST * Req)
 593 {
 594         return IRC_WriteStrClient(Client, ERR_SUMMONDISABLED_MSG,
 595                                   Client_ID(Client), Req->command);
 596 } /* IRC_SUMMON */
 597
 598
 599 GLOBAL bool
 600 IRC_TIME( CLIENT *Client, REQUEST *Req )
 601 {
 602         CLIENT *from, *target;
 603         char t_str[64];
 604         time_t t;
 605
 606         assert( Client != NULL );
 607         assert( Req != NULL );
 608
 609         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 610
 611         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 612         else from = Client;
 613         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 614
 615         if( Req->argc == 1 )
 616         {
 617                 target = Client_Search( Req->argv[0] );
 618                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[0] );
 619
 620                 if( target != Client_ThisServer( ))
 621                 {
 622                         return IRC_WriteStrClientPrefix( target, from, "TIME %s", Req->argv[0] );
 623                 }
 624         }
 625
 626         t = time( NULL );
 627         (void)strftime( t_str, 60, "%A %B %d %Y -- %H:%M %Z", localtime( &t ));
 628         return IRC_WriteStrClient( from, RPL_TIME_MSG, Client_ID( from ), Client_ID( Client_ThisServer( )), t_str );
 629 } /* IRC_TIME */
 630
 631
 632 /**
 633  * Handler for the IRC command "USERHOST".
 634  * See RFC 2812 section 4.8.
 635  */
 636 GLOBAL bool
 637 IRC_USERHOST(CLIENT *Client, REQUEST *Req)
 638 {
 639         char rpl[COMMAND_LEN];
 640         CLIENT *c;
 641         int max, i;
 642
 643         assert(Client != NULL);
 644         assert(Req != NULL);
 645
 646         if ((Req->argc < 1))
 647                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 648                                           Client_ID(Client), Req->command);
 649
 650         if (Req->argc > 5)
 651                 max = 5;
 652         else
 653                 max = Req->argc;
 654
 655         strlcpy(rpl, RPL_USERHOST_MSG, sizeof rpl);
 656         for (i = 0; i < max; i++) {
 657                 c = Client_Search(Req->argv[i]);
 658                 if (c && (Client_Type(c) == CLIENT_USER)) {
 659                         /* This Nick is "online" */
 660                         strlcat(rpl, Client_ID(c), sizeof(rpl));
 661                         if (Client_HasMode(c, 'o'))
 662                                 strlcat(rpl, "*", sizeof(rpl));
 663                         strlcat(rpl, "=", sizeof(rpl));
 664                         if (Client_HasMode(c, 'a'))
 665                                 strlcat(rpl, "-", sizeof(rpl));
 666                         else
 667                                 strlcat(rpl, "+", sizeof(rpl));
 668                         strlcat(rpl, Client_User(c), sizeof(rpl));
 669                         strlcat(rpl, "@", sizeof(rpl));
 670                         strlcat(rpl, Client_HostnameCloaked(c), sizeof(rpl));
 671                         strlcat(rpl, " ", sizeof(rpl));
 672                 }
 673         }
 674         ngt_TrimLastChr(rpl, ' ');
 675
 676         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 677 } /* IRC_USERHOST */
 678
 679
 680 /**
 681  * Handler for the IRC command "USERS".
 682  * See RFC 2812 section 4.6. As suggested there the command is disabled.
 683  */
 684 GLOBAL bool
 685 IRC_USERS(CLIENT * Client, REQUEST * Req)
 686 {
 687         return IRC_WriteStrClient(Client, ERR_USERSDISABLED_MSG,
 688                                   Client_ID(Client), Req->command);
 689 } /* IRC_USERS */
 690
 691
 692 GLOBAL bool
 693 IRC_VERSION( CLIENT *Client, REQUEST *Req )
 694 {
 695         CLIENT *target, *prefix;
 696
 697         assert( Client != NULL );
 698         assert( Req != NULL );
 699
 700         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 701
 702         /* Ziel suchen */
 703         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
 704         else target = Client_ThisServer( );
 705
 706         /* Prefix ermitteln */
 707         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
 708         else prefix = Client;
 709         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 710
 711         /* An anderen Server weiterleiten? */
 712         if( target != Client_ThisServer( ))
 713         {
 714                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
 715
 716                 /* forwarden */
 717                 IRC_WriteStrClientPrefix( target, prefix, "VERSION %s", Req->argv[0] );
 718                 return CONNECTED;
 719         }
 720
 721         /* send version information */
 722         IRC_SetPenalty(Client, 1);
 723         return IRC_WriteStrClient(Client, RPL_VERSION_MSG, Client_ID(prefix),
 724                                   PACKAGE_NAME, PACKAGE_VERSION,
 725                                   NGIRCd_DebugLevel, Conf_ServerName,
 726                                   NGIRCd_VersionAddition);
 727 } /* IRC_VERSION */
 728
 729
 730 static bool
 731 write_whoreply(CLIENT *Client, CLIENT *c, const char *channelname, const char *flags)
 732 {
 733         return IRC_WriteStrClient(Client, RPL_WHOREPLY_MSG, Client_ID(Client),
 734                                   channelname, Client_User(c),
 735                                   Client_HostnameCloaked(c),
 736                                   Client_ID(Client_Introducer(c)), Client_ID(c),
 737                                   flags, Client_Hops(c), Client_Info(c));
 738 }
 739
 740
 741 static const char *
 742 who_flags_status(const char *client_modes)
 743 {
 744         if (strchr(client_modes, 'a'))
 745                 return "G"; /* away */
 746         return "H";
 747 }
 748
 749
 750 static const char *
 751 who_flags_qualifier(const char *chan_user_modes)
 752 {
 753         if (strchr(chan_user_modes, 'o'))
 754                 return "@";
 755         else if (strchr(chan_user_modes, 'v'))
 756                 return "+";
 757         return "";
 758 }
 759
 760
 761 static bool
 762 IRC_Send_WHO(CLIENT *Client, CHANNEL *Chan, bool OnlyOps)
 763 {
 764         bool is_visible, is_member, is_ircop;
 765         CL2CHAN *cl2chan;
 766         const char *client_modes;
 767         const char *chan_user_modes;
 768         char flags[8];
 769         CLIENT *c;
 770
 771         assert( Client != NULL );
 772         assert( Chan != NULL );
 773
 774         is_member = Channel_IsMemberOf(Chan, Client);
 775
 776         /* Secret channel? */
 777         if (!is_member && strchr(Channel_Modes(Chan), 's'))
 778                 return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client), Channel_Name(Chan));
 779
 780         cl2chan = Channel_FirstMember(Chan);
 781         for (; cl2chan ; cl2chan = Channel_NextMember(Chan, cl2chan)) {
 782                 c = Channel_GetClient(cl2chan);
 783
 784                 client_modes = Client_Modes(c);
 785                 is_ircop = strchr(client_modes, 'o') != NULL;
 786                 if (OnlyOps && !is_ircop)
 787                         continue;
 788
 789                 is_visible = strchr(client_modes, 'i') == NULL;
 790                 if (is_member || is_visible) {
 791                         strcpy(flags, who_flags_status(client_modes));
 792                         if (is_ircop)
 793                                 strlcat(flags, "*", sizeof(flags));
 794
 795                         chan_user_modes = Channel_UserModes(Chan, c);
 796                         strlcat(flags, who_flags_qualifier(chan_user_modes), sizeof(flags));
 797
 798                         if (!write_whoreply(Client, c, Channel_Name(Chan), flags))
 799                                 return DISCONNECTED;
 800                 }
 801         }
 802         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client), Channel_Name(Chan));
 803 } /* IRC_Send_WHO */
 804
 805
 806 GLOBAL bool
 807 IRC_WHO( CLIENT *Client, REQUEST *Req )
 808 {
 809         bool only_ops, have_arg, client_match;
 810         const char *channelname, *client_modes, *chan_user_modes;
 811         char pattern[COMMAND_LEN];
 812         char flags[4];
 813         CL2CHAN *cl2chan;
 814         CHANNEL *chan, *cn;
 815         CLIENT *c;
 816
 817         assert( Client != NULL );
 818         assert( Req != NULL );
 819
 820         if (Req->argc > 2)
 821                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 822
 823         only_ops = false;
 824         have_arg = false;
 825
 826         if (Req->argc == 2) {
 827                 if (strcmp(Req->argv[1], "o") == 0)
 828                         only_ops = true;
 829 #ifdef STRICT_RFC
 830                 else return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, Client_ID(Client), Req->command);
 831 #endif
 832         }
 833
 834         IRC_SetPenalty(Client, 1);
 835         if (Req->argc >= 1) { /* Channel or Mask. */
 836                 chan = Channel_Search(Req->argv[0]);
 837                 if (chan)
 838                         return IRC_Send_WHO(Client, chan, only_ops);
 839                 if (strcmp(Req->argv[0], "0") != 0) { /* RFC stupidity, same as no arguments */
 840                         have_arg = true;
 841                         strlcpy(pattern, Req->argv[0], sizeof(pattern));
 842                         ngt_LowerStr(pattern);
 843                         IRC_SetPenalty(Client, 3);
 844                 }
 845         }
 846
 847         for (c = Client_First(); c != NULL; c = Client_Next(c)) {
 848                 if (Client_Type(c) != CLIENT_USER)
 849                         continue;
 850                  /*
 851                   * RFC 2812, 3.6.1:
 852                   * In the absence of the parameter, all visible (users who aren't
 853                   * invisible (user mode +i) and who don't have a common channel
 854                   * with the requesting client) are listed.
 855                   *
 856                   * The same result can be achieved by using a [sic] of "0"
 857                   * or any wildcard which will end up matching every visible user.
 858                   *
 859                   * The [sic] passed to WHO is matched against users' host, server, real name and
 860                   * nickname if the channel cannot be found.
 861                   */
 862                 client_modes = Client_Modes(c);
 863                 if (strchr(client_modes, 'i'))
 864                         continue;
 865
 866                 if (only_ops && !strchr(client_modes, 'o'))
 867                         continue;
 868
 869                 if (have_arg) { /* match pattern against user host/server/name/nick */
 870                         client_match = MatchCaseInsensitive(pattern, Client_Hostname(c)); /* user's host */
 871                         if (!client_match)
 872                                 client_match = MatchCaseInsensitive(pattern, Client_ID(Client_Introducer(c))); /* server */
 873                         if (!client_match)
 874                                 client_match = Match(Req->argv[0], Client_Info(c)); /* realname */
 875                         if (!client_match)
 876                                 client_match = MatchCaseInsensitive(pattern, Client_ID(c)); /* nick name */
 877
 878                         if (!client_match) /* This isn't the client you're looking for */
 879                                 continue;
 880                 }
 881
 882                 strcpy(flags, who_flags_status(client_modes));
 883
 884                 if (strchr(client_modes, 'o')) /* this client is an operator */
 885                         strlcat(flags, "*", sizeof(flags));
 886
 887                 /* Search suitable channel */
 888                 cl2chan = Channel_FirstChannelOf(c);
 889                 while (cl2chan) {
 890                         cn = Channel_GetChannel(cl2chan);
 891                         if (Channel_IsMemberOf(cn, Client) ||
 892                                     !strchr(Channel_Modes(cn), 's'))
 893                         {
 894                                 channelname = Channel_Name(cn);
 895                                 break;
 896                         }
 897                         cl2chan = Channel_NextChannelOf(c, cl2chan);
 898                 }
 899                 if (cl2chan) {
 900                         chan = Channel_GetChannel(cl2chan);
 901                         chan_user_modes = Channel_UserModes(chan, c);
 902                         strlcat(flags, who_flags_qualifier(chan_user_modes), sizeof(flags));
 903                 } else
 904                         channelname = "*";
 905
 906                 if (!write_whoreply(Client, c, channelname, flags))
 907                         return DISCONNECTED;
 908         }
 909
 910         if (Req->argc > 0)
 911                 channelname = Req->argv[0];
 912         else
 913                 channelname = "*";
 914
 915         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client), channelname);
 916 } /* IRC_WHO */
 917
 918
 919 /**
 920  * Generate WHOIS reply of one actual client.
 921  *
 922  * @param Client        The client from which this command has been received.
 923  * @param from          The client requesting the information ("originator").
 924  * @param c             The client of which information should be returned.
 925  * @returns             CONNECTED or DISCONNECTED.
 926  */
 927 static bool
 928 IRC_WHOIS_SendReply(CLIENT *Client, CLIENT *from, CLIENT *c)
 929 {
 930         char str[LINE_LEN + 1];
 931         CL2CHAN *cl2chan;
 932         CHANNEL *chan;
 933
 934         /* Nick, user, hostname and client info */
 935         if (!IRC_WriteStrClient(from, RPL_WHOISUSER_MSG, Client_ID(from),
 936                                 Client_ID(c), Client_User(c),
 937                                 Client_HostnameCloaked(c), Client_Info(c)))
 938                 return DISCONNECTED;
 939
 940         /* Server */
 941         if (!IRC_WriteStrClient(from, RPL_WHOISSERVER_MSG, Client_ID(from),
 942                                 Client_ID(c), Client_ID(Client_Introducer(c)),
 943                                 Client_Info(Client_Introducer(c))))
 944                 return DISCONNECTED;
 945
 946         /* Channels */
 947         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
 948                  Client_ID(from), Client_ID(c));
 949         cl2chan = Channel_FirstChannelOf(c);
 950         while (cl2chan) {
 951                 chan = Channel_GetChannel(cl2chan);
 952                 assert(chan != NULL);
 953
 954                 /* next */
 955                 cl2chan = Channel_NextChannelOf(c, cl2chan);
 956
 957                 /* Secret channel? */
 958                 if (strchr(Channel_Modes(chan), 's')
 959                     && !Channel_IsMemberOf(chan, Client))
 960                         continue;
 961
 962                 /* Local channel and request is not from a user? */
 963                 if (Client_Type(Client) == CLIENT_SERVER
 964                     && Channel_IsLocal(chan))
 965                         continue;
 966
 967                 /* Concatenate channel names */
 968                 if (str[strlen(str) - 1] != ':')
 969                         strlcat(str, " ", sizeof(str));
 970
 971                 strlcat(str, who_flags_qualifier(Channel_UserModes(chan, c)),
 972                                                  sizeof(str));
 973                 strlcat(str, Channel_Name(chan), sizeof(str));
 974
 975                 if (strlen(str) > (LINE_LEN - CHANNEL_NAME_LEN - 4)) {
 976                         /* Line becomes too long: send it! */
 977                         if (!IRC_WriteStrClient(Client, "%s", str))
 978                                 return DISCONNECTED;
 979                         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
 980                                  Client_ID(from), Client_ID(c));
 981                 }
 982         }
 983         if(str[strlen(str) - 1] != ':') {
 984                 /* There is data left to send: */
 985                 if (!IRC_WriteStrClient(Client, "%s", str))
 986                         return DISCONNECTED;
 987         }
 988
 989         /* IRC-Operator? */
 990         if (Client_HasMode(c, 'o') &&
 991                 !IRC_WriteStrClient(from, RPL_WHOISOPERATOR_MSG,
 992                                     Client_ID(from), Client_ID(c)))
 993                         return DISCONNECTED;
 994
 995         /* Connected using SSL? */
 996         if (Conn_UsesSSL(Client_Conn(c)) &&
 997                 !IRC_WriteStrClient(from, RPL_WHOISSSL_MSG,
 998                                     Client_ID(from), Client_ID(c)))
 999                         return DISCONNECTED;
1000
1001         /* Idle and signon time (local clients only!) */
1002         if (Client_Conn(c) > NONE &&
1003                 !IRC_WriteStrClient(from, RPL_WHOISIDLE_MSG,
1004                                     Client_ID(from), Client_ID(c),
1005                                     (unsigned long)Conn_GetIdle(Client_Conn(c)),
1006                                     (unsigned long)Conn_GetSignon(Client_Conn(c))))
1007                         return DISCONNECTED;
1008
1009         /* Away? */
1010         if (Client_HasMode(c, 'a') &&
1011                 !IRC_WriteStrClient(from, RPL_AWAY_MSG,
1012                                     Client_ID(from), Client_ID(c),
1013                                     Client_Away(c)))
1014                         return DISCONNECTED;
1015
1016         return IRC_WriteStrClient(from, RPL_ENDOFWHOIS_MSG,
1017                                   Client_ID(from), Client_ID(c));
1018 } /* IRC_WHOIS_SendReply */
1019
1020
1021 /**
1022  * Handler for the IRC "WHOIS" command.
1023  *
1024  * See RFC 2812, 3.6.2 "Whois query".
1025  *
1026  * @param Client        The client from which this command has been received.
1027  * @param Req           Request structure with prefix and all parameters.
1028  * @return              CONNECTED or DISCONNECTED.
1029  */
1030 GLOBAL bool
1031 IRC_WHOIS( CLIENT *Client, REQUEST *Req )
1032 {
1033         CLIENT *from, *target, *c;
1034         unsigned int match_count = 0, found = 0;
1035         bool has_wildcards, is_remote;
1036         bool got_wildcard = false;
1037         const char *query;
1038
1039         assert( Client != NULL );
1040         assert( Req != NULL );
1041
1042         /* Bad number of parameters? */
1043         if (Req->argc < 1 || Req->argc > 2)
1044                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1045                                           Client_ID(Client), Req->command);
1046
1047         /* Search sender of the WHOIS */
1048         if (Client_Type(Client) == CLIENT_SERVER) {
1049                 from = Client_Search(Req->prefix);
1050         } else {
1051                 IRC_SetPenalty(Client, 1);
1052                 from = Client;
1053         }
1054         if (!from)
1055                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1056                                           Client_ID(Client), Req->prefix);
1057
1058         /* Get target server for this command */
1059         if (Req->argc > 1) {
1060                 /* Search the target server, which can be specified as a
1061                  * nick name on that server as well: */
1062                 target = Client_Search(Req->argv[0]);
1063                 if (!target)
1064                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
1065                                                 Client_ID(from), Req->argv[0]);
1066         } else
1067                 target = Client_ThisServer();
1068         assert(target != NULL);
1069
1070         /* Forward to other server? */
1071         if (Client_NextHop(target) != Client_ThisServer() &&
1072             Client_Type(Client_NextHop(target)) == CLIENT_SERVER)
1073                 return IRC_WriteStrClientPrefix(target, from,
1074                                                 "WHOIS %s :%s",
1075                                                 Req->argv[0], Req->argv[1]);
1076
1077         is_remote = Client_Conn(from) < 0;
1078         for (query = strtok(Req->argv[Req->argc - 1], ",");
1079                         query && found < 3;
1080                         query = strtok(NULL, ","), found++)
1081         {
1082                 has_wildcards = query[strcspn(query, "*?")] != 0;
1083                 /*
1084                  * follows ircd 2.10 implementation:
1085                  *  - handle up to 3 targets
1086                  *  - no wildcards for remote clients
1087                  *  - only one wildcard target per local client
1088                  *
1089                  *  also, at most ten matches are returned.
1090                  */
1091                 if (!has_wildcards || is_remote) {
1092                         c = Client_Search(query);
1093                         if (c) {
1094                                 if (!IRC_WHOIS_SendReply(Client, from, c))
1095                                         return DISCONNECTED;
1096                         } else {
1097                                 if (!IRC_WriteStrClient(Client,
1098                                                         ERR_NOSUCHNICK_MSG,
1099                                                         Client_ID(Client),
1100                                                         query))
1101                                         return DISCONNECTED;
1102                         }
1103                         continue;
1104                 }
1105                 if (got_wildcard) {
1106                         /* we already handled one wildcard query */
1107                         if (!IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1108                              Client_ID(Client), query))
1109                                 return DISCONNECTED;
1110                         continue;
1111                 }
1112                 got_wildcard = true;
1113                 IRC_SetPenalty(Client, 3);
1114
1115                 for (c = Client_First(); c && match_count < 10; c = Client_Next(c)) {
1116                         if (Client_Type(c) != CLIENT_USER)
1117                                 continue;
1118                         if (!MatchCaseInsensitive(query, Client_ID(c)))
1119                                 continue;
1120                         if (!IRC_WHOIS_SendReply(Client, from, c))
1121                                 return DISCONNECTED;
1122                         match_count++;
1123                 }
1124
1125                 if (match_count == 0)
1126                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1127                                 Client_ID(Client), Req->argv[Req->argc - 1]);
1128         }
1129         return CONNECTED;
1130 } /* IRC_WHOIS */
1131
1132
1133 static bool
1134 WHOWAS_EntryWrite(CLIENT *prefix, WHOWAS *entry)
1135 {
1136         char t_str[60];
1137
1138         (void)strftime(t_str, sizeof(t_str), "%a %b %d %H:%M:%S %Y",
1139                                         localtime(&entry->time));
1140
1141         if (!IRC_WriteStrClient(prefix, RPL_WHOWASUSER_MSG, Client_ID(prefix),
1142                         entry->id, entry->user, entry->host, entry->info))
1143                                 return DISCONNECTED;
1144
1145         return IRC_WriteStrClient(prefix, RPL_WHOISSERVER_MSG, Client_ID(prefix),
1146                   entry->id, entry->server, t_str);
1147 }
1148
1149 /**
1150  * IRC "WHOWAS" function.
1151  * This function implements the IRC command "WHOWHAS". It handles local
1152  * requests and request that should be forwarded to other servers.
1153  */
1154 GLOBAL bool
1155 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
1156 {
1157         CLIENT *target, *prefix;
1158         WHOWAS *whowas;
1159         char tok_buf[COMMAND_LEN];
1160         int max, last, count, i, nc;
1161         const char *nick;
1162
1163         assert( Client != NULL );
1164         assert( Req != NULL );
1165
1166         /* Wrong number of parameters? */
1167         if (Req->argc > 3)
1168                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1169                                         Client_ID(Client), Req->command);
1170         if (Req->argc < 1)
1171                 return IRC_WriteStrClient(Client, ERR_NONICKNAMEGIVEN_MSG, Client_ID(Client));
1172
1173         /* Search target */
1174         if (Req->argc == 3)
1175                 target = Client_Search(Req->argv[2]);
1176         else
1177                 target = Client_ThisServer();
1178
1179         /* Get prefix */
1180         if (Client_Type(Client) == CLIENT_SERVER)
1181                 prefix = Client_Search(Req->prefix);
1182         else
1183                 prefix = Client;
1184
1185         if (!prefix)
1186                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1187                                                 Client_ID(Client), Req->prefix);
1188
1189         /* Forward to other server? */
1190         if (target != Client_ThisServer()) {
1191                 if (!target || (Client_Type(target) != CLIENT_SERVER))
1192                         return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
1193                                         Client_ID(prefix), Req->argv[2]);
1194
1195                 /* Forward */
1196                 IRC_WriteStrClientPrefix( target, prefix, "WHOWAS %s %s %s",
1197                                           Req->argv[0], Req->argv[1],
1198                                           Req->argv[2] );
1199                 return CONNECTED;
1200         }
1201
1202         whowas = Client_GetWhowas( );
1203         last = Client_GetLastWhowasIndex( );
1204         if (last < 0)
1205                 last = 0;
1206
1207         max = DEFAULT_WHOWAS;
1208         if (Req->argc > 1) {
1209                 max = atoi(Req->argv[1]);
1210                 if (max < 1)
1211                         max = MAX_WHOWAS;
1212         }
1213
1214         /*
1215          * Break up the nick argument into a list of nicks, if applicable
1216          * Can't modify Req->argv[0] because we need it for RPL_ENDOFWHOWAS_MSG.
1217          */
1218         strlcpy(tok_buf, Req->argv[0], sizeof(tok_buf));
1219         nick = strtok(tok_buf, ",");
1220
1221         for (i=last, count=0; nick != NULL ; nick = strtok(NULL, ",")) {
1222                 nc = 0;
1223                 do {
1224                         /* Used entry? */
1225                         if (whowas[i].time > 0 && strcasecmp(nick, whowas[i].id) == 0) {
1226                                 if (!WHOWAS_EntryWrite(prefix, &whowas[i]))
1227                                         return DISCONNECTED;
1228                                 nc++;
1229                                 count++;
1230                         }
1231                         /* previous entry */
1232                         i--;
1233
1234                         /* "underflow", wrap around */
1235                         if (i < 0)
1236                                 i = MAX_WHOWAS - 1;
1237
1238                         if (nc && count >= max)
1239                                 break;
1240                 } while (i != last);
1241
1242                 if (nc == 0 && !IRC_WriteStrClient(prefix, ERR_WASNOSUCHNICK_MSG,
1243                                                 Client_ID(prefix), nick))
1244                         return DISCONNECTED;
1245         }
1246         return IRC_WriteStrClient(prefix, RPL_ENDOFWHOWAS_MSG, Client_ID(prefix), Req->argv[0]);
1247 } /* IRC_WHOWAS */
1248
1249
1250 GLOBAL bool
1251 IRC_Send_LUSERS( CLIENT *Client )
1252 {
1253         unsigned long cnt;
1254 #ifndef STRICT_RFC
1255         unsigned long max;
1256 #endif
1257
1258         assert( Client != NULL );
1259
1260         /* Users, services and serevers in the network */
1261         if( ! IRC_WriteStrClient( Client, RPL_LUSERCLIENT_MSG, Client_ID( Client ), Client_UserCount( ), Client_ServiceCount( ), Client_ServerCount( ))) return DISCONNECTED;
1262
1263         /* Number of IRC operators */
1264         cnt = Client_OperCount( );
1265         if( cnt > 0 )
1266         {
1267                 if( ! IRC_WriteStrClient( Client, RPL_LUSEROP_MSG, Client_ID( Client ), cnt )) return DISCONNECTED;
1268         }
1269
1270         /* Unknown connections */
1271         cnt = Client_UnknownCount( );
1272         if( cnt > 0 )
1273         {
1274                 if( ! IRC_WriteStrClient( Client, RPL_LUSERUNKNOWN_MSG, Client_ID( Client ), cnt )) return DISCONNECTED;
1275         }
1276
1277         /* Number of created channels */
1278         if( ! IRC_WriteStrClient( Client, RPL_LUSERCHANNELS_MSG, Client_ID( Client ), Channel_Count( ))) return DISCONNECTED;
1279
1280         /* Number of local users, services and servers */
1281         if( ! IRC_WriteStrClient( Client, RPL_LUSERME_MSG, Client_ID( Client ), Client_MyUserCount( ), Client_MyServiceCount( ), Client_MyServerCount( ))) return DISCONNECTED;
1282
1283 #ifndef STRICT_RFC
1284         /* Maximum number of local users */
1285         cnt = Client_MyUserCount();
1286         max = Client_MyMaxUserCount();
1287         if (! IRC_WriteStrClient(Client, RPL_LOCALUSERS_MSG, Client_ID(Client),
1288                         cnt, max, cnt, max))
1289                 return DISCONNECTED;
1290         /* Maximum number of users in the network */
1291         cnt = Client_UserCount();
1292         max = Client_MaxUserCount();
1293         if(! IRC_WriteStrClient(Client, RPL_NETUSERS_MSG, Client_ID(Client),
1294                         cnt, max, cnt, max))
1295                 return DISCONNECTED;
1296         /* Connection counters */
1297         if (! IRC_WriteStrClient(Client, RPL_STATSCONN_MSG, Client_ID(Client),
1298                         Conn_CountMax(), Conn_CountAccepted()))
1299                 return DISCONNECTED;
1300 #endif
1301
1302         return CONNECTED;
1303 } /* IRC_Send_LUSERS */
1304
1305
1306 static bool
1307 Show_MOTD_Start(CLIENT *Client)
1308 {
1309         return IRC_WriteStrClient(Client, RPL_MOTDSTART_MSG,
1310                 Client_ID( Client ), Client_ID( Client_ThisServer( )));
1311 }
1312
1313 static bool
1314 Show_MOTD_Sendline(CLIENT *Client, const char *msg)
1315 {
1316         return IRC_WriteStrClient(Client, RPL_MOTD_MSG, Client_ID( Client ), msg);
1317 }
1318
1319 static bool
1320 Show_MOTD_End(CLIENT *Client)
1321 {
1322         return IRC_WriteStrClient( Client, RPL_ENDOFMOTD_MSG, Client_ID( Client ));
1323 }
1324
1325 #ifdef SSL_SUPPORT
1326 static bool Show_MOTD_SSLInfo(CLIENT *Client)
1327 {
1328         bool ret = true;
1329         char buf[COMMAND_LEN] = "Connected using Cipher ";
1330
1331         if (!Conn_GetCipherInfo(Client_Conn(Client), buf + 23, sizeof buf - 23))
1332                 return true;
1333
1334         if (!Show_MOTD_Sendline(Client, buf))
1335                 ret = false;
1336
1337         return ret;
1338 }
1339 #else
1340 static inline bool
1341 Show_MOTD_SSLInfo(UNUSED CLIENT *c)
1342 { return true; }
1343 #endif
1344
1345 GLOBAL bool
1346 IRC_Show_MOTD( CLIENT *Client )
1347 {
1348         const char *line;
1349         size_t len_tot, len_str;
1350
1351         assert( Client != NULL );
1352
1353         len_tot = array_bytes(&Conf_Motd);
1354         if (len_tot == 0 && !Conn_UsesSSL(Client_Conn(Client)))
1355                 return IRC_WriteStrClient(Client, ERR_NOMOTD_MSG, Client_ID(Client));
1356
1357         if (!Show_MOTD_Start(Client))
1358                 return DISCONNECTED;
1359
1360         line = array_start(&Conf_Motd);
1361         while (len_tot > 0) {
1362                 len_str = strlen(line) + 1;
1363
1364                 assert(len_tot >= len_str);
1365                 len_tot -= len_str;
1366
1367                 if (!Show_MOTD_Sendline(Client, line))
1368                         return DISCONNECTED;
1369                 line += len_str;
1370         }
1371
1372         if (!Show_MOTD_SSLInfo(Client))
1373                 return DISCONNECTED;
1374         return Show_MOTD_End(Client);
1375 } /* IRC_Show_MOTD */
1376
1377
1378 GLOBAL bool
1379 IRC_Send_NAMES( CLIENT *Client, CHANNEL *Chan )
1380 {
1381         bool is_visible, is_member;
1382         char str[LINE_LEN + 1];
1383         CL2CHAN *cl2chan;
1384         CLIENT *cl;
1385
1386         assert( Client != NULL );
1387         assert( Chan != NULL );
1388
1389         if( Channel_IsMemberOf( Chan, Client )) is_member = true;
1390         else is_member = false;
1391
1392         /* Secret channel? */
1393         if( ! is_member && strchr( Channel_Modes( Chan ), 's' )) return CONNECTED;
1394
1395         /* Alle Mitglieder suchen */
1396         snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1397         cl2chan = Channel_FirstMember( Chan );
1398         while( cl2chan )
1399         {
1400                 cl = Channel_GetClient( cl2chan );
1401
1402                 if( strchr( Client_Modes( cl ), 'i' )) is_visible = false;
1403                 else is_visible = true;
1404
1405                 if( is_member || is_visible )
1406                 {
1407                         /* Nick anhaengen */
1408                         if( str[strlen( str ) - 1] != ':' ) strlcat( str, " ", sizeof( str ));
1409                         if( strchr( Channel_UserModes( Chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
1410                         else if( strchr( Channel_UserModes( Chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
1411                         strlcat( str, Client_ID( cl ), sizeof( str ));
1412
1413                         if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
1414                         {
1415                                 /* Zeile wird zu lang: senden! */
1416                                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1417                                 snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1418                         }
1419                 }
1420
1421                 /* naechstes Mitglied suchen */
1422                 cl2chan = Channel_NextMember( Chan, cl2chan );
1423         }
1424         if( str[strlen( str ) - 1] != ':')
1425         {
1426                 /* Es sind noch Daten da, die gesendet werden muessen */
1427                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1428         }
1429
1430         return CONNECTED;
1431 } /* IRC_Send_NAMES */
1432
1433
1434 /**
1435  * Send the ISUPPORT numeric (005).
1436  * This numeric indicates the features that are supported by this server.
1437  * See <http://www.irc.org/tech_docs/005.html> for details.
1438  */
1439 GLOBAL bool
1440 IRC_Send_ISUPPORT(CLIENT * Client)
1441 {
1442         if (!IRC_WriteStrClient(Client, RPL_ISUPPORT1_MSG, Client_ID(Client),
1443                                 Conf_MaxJoins))
1444                 return DISCONNECTED;
1445         return IRC_WriteStrClient(Client, RPL_ISUPPORT2_MSG, Client_ID(Client),
1446                                   CHANNEL_NAME_LEN - 1, Conf_MaxNickLength - 1,
1447                                   COMMAND_LEN - 23, CLIENT_AWAY_LEN - 1,
1448                                   COMMAND_LEN - 113);
1449 } /* IRC_Send_ISUPPORT */
1450
1451
1452 /* -eof- */