src/ngircd/irc-info.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2010 Alexander Barton <alex@barton.de>
   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  * IRC info commands
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 #include "imp.h"
  18 #include <assert.h>
  19 #include <errno.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <strings.h>
  24
  25 #include "ngircd.h"
  26 #include "conn-func.h"
  27 #include "conn-zip.h"
  28 #include "channel.h"
  29 #include "conf.h"
  30 #include "defines.h"
  31 #include "log.h"
  32 #include "messages.h"
  33 #include "match.h"
  34 #include "tool.h"
  35 #include "parse.h"
  36 #include "irc-write.h"
  37
  38 #include "exp.h"
  39 #include "irc-info.h"
  40
  41
  42 GLOBAL bool
  43 IRC_ADMIN(CLIENT *Client, REQUEST *Req )
  44 {
  45         CLIENT *target, *prefix;
  46
  47         assert( Client != NULL );
  48         assert( Req != NULL );
  49
  50         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  51
  52         /* find target ... */
  53         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
  54         else target = Client_ThisServer( );
  55
  56         /* find Prefix */
  57         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
  58         else prefix = Client;
  59         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  60
  61         /* forwad message to another server? */
  62         if( target != Client_ThisServer( ))
  63         {
  64                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
  65
  66                 /* forward */
  67                 IRC_WriteStrClientPrefix( target, prefix, "ADMIN %s", Req->argv[0] );
  68                 return CONNECTED;
  69         }
  70
  71         /* mit Versionsinfo antworten */
  72         if( ! IRC_WriteStrClient( Client, RPL_ADMINME_MSG, Client_ID( prefix ), Conf_ServerName )) return DISCONNECTED;
  73         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC1_MSG, Client_ID( prefix ), Conf_ServerAdmin1 )) return DISCONNECTED;
  74         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC2_MSG, Client_ID( prefix ), Conf_ServerAdmin2 )) return DISCONNECTED;
  75         if( ! IRC_WriteStrClient( Client, RPL_ADMINEMAIL_MSG, Client_ID( prefix ), Conf_ServerAdminMail )) return DISCONNECTED;
  76
  77         IRC_SetPenalty( Client, 1 );
  78         return CONNECTED;
  79 } /* IRC_ADMIN */
  80
  81
  82 /**
  83  * Handler for the IRC command "INFO".
  84  * See RFC 2812 section 3.4.10.
  85  */
  86 GLOBAL bool
  87 IRC_INFO(CLIENT * Client, REQUEST * Req)
  88 {
  89         CLIENT *target, *prefix;
  90         char msg[510];
  91
  92         assert(Client != NULL);
  93         assert(Req != NULL);
  94
  95         /* Wrong number of parameters? */
  96         if (Req->argc > 1)
  97                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
  98                                           Client_ID(Client), Req->command);
  99
 100         /* Determine prefix */
 101         if (Client_Type(Client) == CLIENT_SERVER)
 102                 prefix = Client_Search(Req->prefix);
 103         else
 104                 prefix = Client;
 105         if (!prefix)
 106                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 107                                           Client_ID(Client), Req->prefix);
 108
 109         /* Look for a target */
 110         if (Req->argc > 0)
 111                 target = Client_Search(Req->argv[0]);
 112         else
 113                 target = Client_ThisServer();
 114
 115         /* Make sure that the target is a server */
 116         if (target && Client_Type(target) != CLIENT_SERVER)
 117                 target = Client_Introducer(target);
 118
 119         if (!target)
 120                 return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
 121                                           Client_ID(prefix), Req->argv[0]);
 122
 123         /* Pass on to another server? */
 124         if (target != Client_ThisServer()) {
 125                 IRC_WriteStrClientPrefix(target, prefix, "INFO %s",
 126                                          Req->argv[0]);
 127                 return CONNECTED;
 128         }
 129
 130         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix),
 131                                 NGIRCd_Version))
 132                 return DISCONNECTED;
 133
 134 #if defined(__DATE__) && defined(__TIME__)
 135         snprintf(msg, sizeof(msg), "Birth Date: %s at %s", __DATE__, __TIME__);
 136         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 137                 return DISCONNECTED;
 138 #endif
 139
 140         strlcpy(msg, "On-line since ", sizeof(msg));
 141         strlcat(msg, NGIRCd_StartStr, sizeof(msg));
 142         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 143                 return DISCONNECTED;
 144
 145         if (!IRC_WriteStrClient(Client, RPL_ENDOFINFO_MSG, Client_ID(prefix)))
 146                 return DISCONNECTED;
 147
 148         IRC_SetPenalty(Client, 2);
 149         return CONNECTED;
 150 } /* IRC_INFO */
 151
 152
 153 GLOBAL bool
 154 IRC_ISON( CLIENT *Client, REQUEST *Req )
 155 {
 156         char rpl[COMMAND_LEN];
 157         CLIENT *c;
 158         char *ptr;
 159         int i;
 160
 161         assert( Client != NULL );
 162         assert( Req != NULL );
 163
 164         /* Falsche Anzahl Parameter? */
 165         if(( Req->argc < 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 166
 167         strlcpy( rpl, RPL_ISON_MSG, sizeof rpl );
 168         for( i = 0; i < Req->argc; i++ )
 169         {
 170                 ptr = strtok( Req->argv[i], " " );
 171                 while( ptr )
 172                 {
 173                         ngt_TrimStr( ptr );
 174                         c = Client_Search( ptr );
 175                         if( c && ( Client_Type( c ) == CLIENT_USER ))
 176                         {
 177                                 /* Dieser Nick ist "online" */
 178                                 strlcat( rpl, ptr, sizeof( rpl ));
 179                                 strlcat( rpl, " ", sizeof( rpl ));
 180                         }
 181                         ptr = strtok( NULL, " " );
 182                 }
 183         }
 184         ngt_TrimLastChr(rpl, ' ');
 185
 186         return IRC_WriteStrClient( Client, rpl, Client_ID( Client ) );
 187 } /* IRC_ISON */
 188
 189
 190 GLOBAL bool
 191 IRC_LINKS( CLIENT *Client, REQUEST *Req )
 192 {
 193         CLIENT *target, *from, *c;
 194         char *mask;
 195
 196         assert( Client != NULL );
 197         assert( Req != NULL );
 198
 199         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 200
 201         /* Server-Mask ermitteln */
 202         if( Req->argc > 0 ) mask = Req->argv[Req->argc - 1];
 203         else mask = "*";
 204
 205         /* Absender ermitteln */
 206         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 207         else from = Client;
 208         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 209
 210         /* An anderen Server forwarden? */
 211         if( Req->argc == 2 )
 212         {
 213                 target = Client_Search( Req->argv[0] );
 214                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 215                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LINKS %s %s", Req->argv[0], Req->argv[1] );
 216         }
 217
 218         /* Wer ist der Absender? */
 219         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 220         else target = Client;
 221         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 222
 223         c = Client_First( );
 224         while( c )
 225         {
 226                 if( Client_Type( c ) == CLIENT_SERVER )
 227                 {
 228                         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;
 229                 }
 230                 c = Client_Next( c );
 231         }
 232
 233         IRC_SetPenalty( target, 1 );
 234         return IRC_WriteStrClient( target, RPL_ENDOFLINKS_MSG, Client_ID( target ), mask );
 235 } /* IRC_LINKS */
 236
 237
 238 GLOBAL bool
 239 IRC_LUSERS( CLIENT *Client, REQUEST *Req )
 240 {
 241         CLIENT *target, *from;
 242
 243         assert( Client != NULL );
 244         assert( Req != NULL );
 245
 246         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 247
 248         /* Absender ermitteln */
 249         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 250         else from = Client;
 251         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 252
 253         /* An anderen Server forwarden? */
 254         if( Req->argc == 2 )
 255         {
 256                 target = Client_Search( Req->argv[1] );
 257                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 258                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LUSERS %s %s", Req->argv[0], Req->argv[1] );
 259         }
 260
 261         /* Wer ist der Absender? */
 262         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 263         else target = Client;
 264         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 265
 266         IRC_Send_LUSERS( target );
 267
 268         IRC_SetPenalty( target, 1 );
 269         return CONNECTED;
 270 } /* IRC_LUSERS */
 271
 272
 273 /**
 274  * Handler for the IRC command "SERVLIST".
 275  * List registered services, see RFC 2811, section 3.5.1: the syntax is
 276  * "SERVLIST [<mask> [<type>]]".
 277  */
 278 GLOBAL bool
 279 IRC_SERVLIST(CLIENT *Client, REQUEST *Req)
 280 {
 281         CLIENT *c;
 282
 283         assert(Client != NULL);
 284         assert(Req != NULL);
 285
 286         if (Req->argc > 2)
 287                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 288                                           Client_ID(Client), Req->command);
 289
 290         if (Req->argc < 2 || strcmp(Req->argv[1], "0") == 0) {
 291                 for (c = Client_First(); c!= NULL; c = Client_Next(c)) {
 292                         if (Client_Type(c) != CLIENT_SERVICE)
 293                                 continue;
 294                         if (Req->argc > 0 && !MatchCaseInsensitive(Req->argv[0],
 295                                                                   Client_ID(c)))
 296                                 continue;
 297                         if (!IRC_WriteStrClient(Client, RPL_SERVLIST_MSG,
 298                                         Client_ID(Client), Client_Mask(c),
 299                                         Client_Mask(Client_Introducer(c)), "*",
 300                                         0, Client_Hops(c), Client_Info(c)))
 301                                 return DISCONNECTED;
 302                 }
 303         }
 304
 305         return IRC_WriteStrClient(Client, RPL_SERVLISTEND_MSG, Client_ID(Client),
 306                                   Req->argc > 0 ? Req->argv[0] : "*",
 307                                   Req->argc > 1 ? Req->argv[1] : "0");
 308 } /* IRC_SERVLIST */
 309
 310
 311 GLOBAL bool
 312 IRC_MOTD( CLIENT *Client, REQUEST *Req )
 313 {
 314         CLIENT *from, *target;
 315
 316         assert( Client != NULL );
 317         assert( Req != NULL );
 318
 319         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 320
 321         /* From aus Prefix ermitteln */
 322         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 323         else from = Client;
 324         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 325
 326         if( Req->argc == 1 )
 327         {
 328                 /* forward? */
 329                 target = Client_Search( Req->argv[0] );
 330                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 331
 332                 if( target != Client_ThisServer( ))
 333                 {
 334                         /* Ok, anderer Server ist das Ziel: forwarden */
 335                         return IRC_WriteStrClientPrefix( target, from, "MOTD %s", Req->argv[0] );
 336                 }
 337         }
 338
 339         IRC_SetPenalty( from, 3 );
 340         return IRC_Show_MOTD( from );
 341 } /* IRC_MOTD */
 342
 343
 344 GLOBAL bool
 345 IRC_NAMES( CLIENT *Client, REQUEST *Req )
 346 {
 347         char rpl[COMMAND_LEN], *ptr;
 348         CLIENT *target, *from, *c;
 349         CHANNEL *chan;
 350
 351         assert( Client != NULL );
 352         assert( Req != NULL );
 353
 354         if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 355
 356         /* use prefix to determine "From" */
 357         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 358         else from = Client;
 359         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 360
 361         if( Req->argc == 2 )
 362         {
 363                 /* forward to another server? */
 364                 target = Client_Search( Req->argv[1] );
 365                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 366
 367                 if( target != Client_ThisServer( )) {
 368                         /* target is another server, forward */
 369                         return IRC_WriteStrClientPrefix( target, from, "NAMES %s :%s", Req->argv[0], Req->argv[1] );
 370                 }
 371         }
 372
 373         if( Req->argc > 0 )
 374         {
 375                 /* bestimmte Channels durchgehen */
 376                 ptr = strtok( Req->argv[0], "," );
 377                 while( ptr )
 378                 {
 379                         chan = Channel_Search( ptr );
 380                         if( chan )
 381                         {
 382                                 /* print name */
 383                                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 384                         }
 385                         if( ! IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), ptr )) return DISCONNECTED;
 386
 387                         /* get next channel name */
 388                         ptr = strtok( NULL, "," );
 389                 }
 390                 return CONNECTED;
 391         }
 392
 393         chan = Channel_First( );
 394         while( chan )
 395         {
 396                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 397
 398                 chan = Channel_Next( chan );
 399         }
 400
 401         /* Now print all clients which are not in any channel */
 402         c = Client_First( );
 403         snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 404         while( c )
 405         {
 406                 if(( Client_Type( c ) == CLIENT_USER ) && ( Channel_FirstChannelOf( c ) == NULL ) && ( ! strchr( Client_Modes( c ), 'i' )))
 407                 {
 408                         /* its a user, concatenate ... */
 409                         if( rpl[strlen( rpl ) - 1] != ':' ) strlcat( rpl, " ", sizeof( rpl ));
 410                         strlcat( rpl, Client_ID( c ), sizeof( rpl ));
 411
 412                         if( strlen( rpl ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
 413                         {
 414                                 /* Line is gwoing too long, send now */
 415                                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 416                                 snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 417                         }
 418                 }
 419
 420                 c = Client_Next( c );
 421         }
 422         if( rpl[strlen( rpl ) - 1] != ':')
 423         {
 424                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 425         }
 426
 427         IRC_SetPenalty( from, 1 );
 428         return IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), "*" );
 429 } /* IRC_NAMES */
 430
 431
 432 static unsigned int
 433 t_diff(time_t *t, const time_t d)
 434 {
 435         time_t diff, remain;
 436
 437         diff = *t / d;
 438         remain = diff * d;
 439         *t -= remain;
 440
 441         return (unsigned int)diff;
 442 }
 443
 444
 445 static unsigned int
 446 uptime_days(time_t *now)
 447 {
 448         return t_diff(now, 60 * 60 * 24);
 449 }
 450
 451
 452 static unsigned int
 453 uptime_hrs(time_t *now)
 454 {
 455         return t_diff(now, 60 * 60);
 456 }
 457
 458
 459 static unsigned int
 460 uptime_mins(time_t *now)
 461 {
 462          return t_diff(now, 60);
 463 }
 464
 465
 466 /**
 467  * Handler for the IRC command "STATS".
 468  * See RFC 2812 section 3.4.4.
 469  */
 470 GLOBAL bool
 471 IRC_STATS( CLIENT *Client, REQUEST *Req )
 472 {
 473         CLIENT *from, *target, *cl;
 474         CONN_ID con;
 475         char query;
 476         COMMAND *cmd;
 477         time_t time_now;
 478         unsigned int days, hrs, mins;
 479
 480         assert(Client != NULL);
 481         assert(Req != NULL);
 482
 483         if (Req->argc > 2)
 484                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 485                                           Client_ID(Client), Req->command);
 486
 487         /* use prefix to determine "From" */
 488         if (Client_Type(Client) == CLIENT_SERVER)
 489                 from = Client_Search(Req->prefix);
 490         else
 491                 from = Client;
 492
 493         if (!from)
 494                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 495                                           Client_ID(Client), Req->prefix);
 496
 497         if (Req->argc == 2) {
 498                 /* forward to another server? */
 499                 target = Client_Search(Req->argv[1]);
 500                 if ((!target) || (Client_Type(target) != CLIENT_SERVER))
 501                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 502                                                  Client_ID(from), Req->argv[1]);
 503
 504                 if (target != Client_ThisServer()) {
 505                         /* forward to another server */
 506                         return IRC_WriteStrClientPrefix(target, from,
 507                                      "STATS %s %s", Req->argv[0], Req->argv[1]);
 508                 }
 509         }
 510
 511         if (Req->argc > 0)
 512                 query = Req->argv[0][0] ? Req->argv[0][0] : '*';
 513         else
 514                 query = '*';
 515
 516         switch (query) {
 517         case 'l':       /* Link status (servers and own link) */
 518         case 'L':
 519                 time_now = time(NULL);
 520                 for (con = Conn_First(); con != NONE; con = Conn_Next(con)) {
 521                         cl = Conn_GetClient(con);
 522                         if (!cl)
 523                                 continue;
 524                         if ((Client_Type(cl) == CLIENT_SERVER)
 525                             || (cl == Client)) {
 526                                 /* Server link or our own connection */
 527 #ifdef ZLIB
 528                                 if (Conn_Options(con) & CONN_ZIP) {
 529                                         if (!IRC_WriteStrClient
 530                                             (from, RPL_STATSLINKINFOZIP_MSG,
 531                                              Client_ID(from), Client_Mask(cl),
 532                                              Conn_SendQ(con), Conn_SendMsg(con),
 533                                              Zip_SendBytes(con),
 534                                              Conn_SendBytes(con),
 535                                              Conn_RecvMsg(con),
 536                                              Zip_RecvBytes(con),
 537                                              Conn_RecvBytes(con),
 538                                              (long)(time_now - Conn_StartTime(con))))
 539                                                 return DISCONNECTED;
 540                                         continue;
 541                                 }
 542 #endif
 543                                 if (!IRC_WriteStrClient
 544                                     (from, RPL_STATSLINKINFO_MSG,
 545                                      Client_ID(from), Client_Mask(cl),
 546                                      Conn_SendQ(con), Conn_SendMsg(con),
 547                                      Conn_SendBytes(con), Conn_RecvMsg(con),
 548                                      Conn_RecvBytes(con),
 549                                      (long)(time_now - Conn_StartTime(con))))
 550                                         return DISCONNECTED;
 551                         }
 552                 }
 553                 break;
 554         case 'm':       /* IRC command status (usage count) */
 555         case 'M':
 556                 cmd = Parse_GetCommandStruct();
 557                 for (; cmd->name; cmd++) {
 558                         if (cmd->lcount == 0 && cmd->rcount == 0)
 559                                 continue;
 560                         if (!IRC_WriteStrClient
 561                             (from, RPL_STATSCOMMANDS_MSG, Client_ID(from),
 562                              cmd->name, cmd->lcount, cmd->bytes, cmd->rcount))
 563                                 return DISCONNECTED;
 564                 }
 565                 break;
 566         case 'u':       /* Server uptime */
 567         case 'U':
 568                 time_now = time(NULL) - NGIRCd_Start;
 569                 days = uptime_days(&time_now);
 570                 hrs = uptime_hrs(&time_now);
 571                 mins = uptime_mins(&time_now);
 572                 if (!IRC_WriteStrClient(from, RPL_STATSUPTIME, Client_ID(from),
 573                                        days, hrs, mins, (unsigned int)time_now))
 574                         return DISCONNECTED;
 575                 break;
 576         }
 577
 578         IRC_SetPenalty(from, 2);
 579         return IRC_WriteStrClient(from, RPL_ENDOFSTATS_MSG,
 580                                   Client_ID(from), query);
 581 } /* IRC_STATS */
 582
 583
 584 /**
 585  * Handler for the IRC command "SUMMON".
 586  * See RFC 2812 section 4.5. ngIRCd doesn't implement this functionality and
 587  * therefore answers with ERR_SUMMONDISABLED.
 588  */
 589 GLOBAL bool
 590 IRC_SUMMON(CLIENT * Client, REQUEST * Req)
 591 {
 592         return IRC_WriteStrClient(Client, ERR_SUMMONDISABLED_MSG,
 593                                   Client_ID(Client), Req->command);
 594 } /* IRC_SUMMON */
 595
 596
 597 GLOBAL bool
 598 IRC_TIME( CLIENT *Client, REQUEST *Req )
 599 {
 600         CLIENT *from, *target;
 601         char t_str[64];
 602         time_t t;
 603
 604         assert( Client != NULL );
 605         assert( Req != NULL );
 606
 607         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 608
 609         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 610         else from = Client;
 611         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 612
 613         if( Req->argc == 1 )
 614         {
 615                 target = Client_Search( Req->argv[0] );
 616                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[0] );
 617
 618                 if( target != Client_ThisServer( ))
 619                 {
 620                         return IRC_WriteStrClientPrefix( target, from, "TIME %s", Req->argv[0] );
 621                 }
 622         }
 623
 624         t = time( NULL );
 625         (void)strftime( t_str, 60, "%A %B %d %Y -- %H:%M %Z", localtime( &t ));
 626         return IRC_WriteStrClient( from, RPL_TIME_MSG, Client_ID( from ), Client_ID( Client_ThisServer( )), t_str );
 627 } /* IRC_TIME */
 628
 629
 630 /**
 631  * Handler for the IRC command "USERHOST".
 632  * See RFC 2812 section 4.8.
 633  */
 634 GLOBAL bool
 635 IRC_USERHOST(CLIENT *Client, REQUEST *Req)
 636 {
 637         char rpl[COMMAND_LEN];
 638         CLIENT *c;
 639         int max, i;
 640
 641         assert(Client != NULL);
 642         assert(Req != NULL);
 643
 644         if ((Req->argc < 1))
 645                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 646                                           Client_ID(Client), Req->command);
 647
 648         if (Req->argc > 5)
 649                 max = 5;
 650         else
 651                 max = Req->argc;
 652
 653         strlcpy(rpl, RPL_USERHOST_MSG, sizeof rpl);
 654         for (i = 0; i < max; i++) {
 655                 c = Client_Search(Req->argv[i]);
 656                 if (c && (Client_Type(c) == CLIENT_USER)) {
 657                         /* This Nick is "online" */
 658                         strlcat(rpl, Client_ID(c), sizeof(rpl));
 659                         if (Client_HasMode(c, 'o'))
 660                                 strlcat(rpl, "*", sizeof(rpl));
 661                         strlcat(rpl, "=", sizeof(rpl));
 662                         if (Client_HasMode(c, 'a'))
 663                                 strlcat(rpl, "-", sizeof(rpl));
 664                         else
 665                                 strlcat(rpl, "+", sizeof(rpl));
 666                         strlcat(rpl, Client_User(c), sizeof(rpl));
 667                         strlcat(rpl, "@", sizeof(rpl));
 668                         strlcat(rpl, Client_HostnameCloaked(c), sizeof(rpl));
 669                         strlcat(rpl, " ", sizeof(rpl));
 670                 }
 671         }
 672         ngt_TrimLastChr(rpl, ' ');
 673
 674         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 675 } /* IRC_USERHOST */
 676
 677
 678 /**
 679  * Handler for the IRC command "USERS".
 680  * See RFC 2812 section 4.6. As suggested there the command is disabled.
 681  */
 682 GLOBAL bool
 683 IRC_USERS(CLIENT * Client, REQUEST * Req)
 684 {
 685         return IRC_WriteStrClient(Client, ERR_USERSDISABLED_MSG,
 686                                   Client_ID(Client), Req->command);
 687 } /* IRC_USERS */
 688
 689
 690 GLOBAL bool
 691 IRC_VERSION( CLIENT *Client, REQUEST *Req )
 692 {
 693         CLIENT *target, *prefix;
 694
 695         assert( Client != NULL );
 696         assert( Req != NULL );
 697
 698         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 699
 700         /* Ziel suchen */
 701         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
 702         else target = Client_ThisServer( );
 703
 704         /* Prefix ermitteln */
 705         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
 706         else prefix = Client;
 707         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 708
 709         /* An anderen Server weiterleiten? */
 710         if( target != Client_ThisServer( ))
 711         {
 712                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
 713
 714                 /* forwarden */
 715                 IRC_WriteStrClientPrefix( target, prefix, "VERSION %s", Req->argv[0] );
 716                 return CONNECTED;
 717         }
 718
 719         /* send version information */
 720         IRC_SetPenalty(Client, 1);
 721         return IRC_WriteStrClient(Client, RPL_VERSION_MSG, Client_ID(prefix),
 722                                   PACKAGE_NAME, PACKAGE_VERSION,
 723                                   NGIRCd_DebugLevel, Conf_ServerName,
 724                                   NGIRCd_VersionAddition);
 725 } /* IRC_VERSION */
 726
 727
 728 static bool
 729 write_whoreply(CLIENT *Client, CLIENT *c, const char *channelname, const char *flags)
 730 {
 731         return IRC_WriteStrClient(Client, RPL_WHOREPLY_MSG, Client_ID(Client),
 732                                   channelname, Client_User(c),
 733                                   Client_HostnameCloaked(c),
 734                                   Client_ID(Client_Introducer(c)), Client_ID(c),
 735                                   flags, Client_Hops(c), Client_Info(c));
 736 }
 737
 738
 739 static const char *
 740 who_flags_status(const char *client_modes)
 741 {
 742         if (strchr(client_modes, 'a'))
 743                 return "G"; /* away */
 744         return "H";
 745 }
 746
 747
 748 static const char *
 749 who_flags_qualifier(const char *chan_user_modes)
 750 {
 751         if (strchr(chan_user_modes, 'o'))
 752                 return "@";
 753         else if (strchr(chan_user_modes, 'v'))
 754                 return "+";
 755         return "";
 756 }
 757
 758
 759 static bool
 760 IRC_Send_WHO(CLIENT *Client, CHANNEL *Chan, bool OnlyOps)
 761 {
 762         bool is_visible, is_member, is_ircop;
 763         CL2CHAN *cl2chan;
 764         const char *client_modes;
 765         const char *chan_user_modes;
 766         char flags[8];
 767         CLIENT *c;
 768
 769         assert( Client != NULL );
 770         assert( Chan != NULL );
 771
 772         is_member = Channel_IsMemberOf(Chan, Client);
 773
 774         /* Secret channel? */
 775         if (!is_member && strchr(Channel_Modes(Chan), 's'))
 776                 return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client), Channel_Name(Chan));
 777
 778         cl2chan = Channel_FirstMember(Chan);
 779         for (; cl2chan ; cl2chan = Channel_NextMember(Chan, cl2chan)) {
 780                 c = Channel_GetClient(cl2chan);
 781
 782                 client_modes = Client_Modes(c);
 783                 is_ircop = strchr(client_modes, 'o') != NULL;
 784                 if (OnlyOps && !is_ircop)
 785                         continue;
 786
 787                 is_visible = strchr(client_modes, 'i') == NULL;
 788                 if (is_member || is_visible) {
 789                         strcpy(flags, who_flags_status(client_modes));
 790                         if (is_ircop)
 791                                 strlcat(flags, "*", sizeof(flags));
 792
 793                         chan_user_modes = Channel_UserModes(Chan, c);
 794                         strlcat(flags, who_flags_qualifier(chan_user_modes), sizeof(flags));
 795
 796                         if (!write_whoreply(Client, c, Channel_Name(Chan), flags))
 797                                 return DISCONNECTED;
 798                 }
 799         }
 800         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client), Channel_Name(Chan));
 801 } /* IRC_Send_WHO */
 802
 803
 804 GLOBAL bool
 805 IRC_WHO( CLIENT *Client, REQUEST *Req )
 806 {
 807         bool only_ops, have_arg, client_match;
 808         const char *channelname, *client_modes, *chan_user_modes;
 809         char pattern[COMMAND_LEN];
 810         char flags[4];
 811         CL2CHAN *cl2chan;
 812         CHANNEL *chan, *cn;
 813         CLIENT *c;
 814
 815         assert( Client != NULL );
 816         assert( Req != NULL );
 817
 818         if (Req->argc > 2)
 819                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 820
 821         only_ops = false;
 822         have_arg = false;
 823
 824         if (Req->argc == 2) {
 825                 if (strcmp(Req->argv[1], "o") == 0)
 826                         only_ops = true;
 827 #ifdef STRICT_RFC
 828                 else return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, Client_ID(Client), Req->command);
 829 #endif
 830         }
 831
 832         IRC_SetPenalty(Client, 1);
 833         if (Req->argc >= 1) { /* Channel or Mask. */
 834                 chan = Channel_Search(Req->argv[0]);
 835                 if (chan)
 836                         return IRC_Send_WHO(Client, chan, only_ops);
 837                 if (strcmp(Req->argv[0], "0") != 0) { /* RFC stupidity, same as no arguments */
 838                         have_arg = true;
 839                         strlcpy(pattern, Req->argv[0], sizeof(pattern));
 840                         ngt_LowerStr(pattern);
 841                         IRC_SetPenalty(Client, 3);
 842                 }
 843         }
 844
 845         for (c = Client_First(); c != NULL; c = Client_Next(c)) {
 846                 if (Client_Type(c) != CLIENT_USER)
 847                         continue;
 848                  /*
 849                   * RFC 2812, 3.6.1:
 850                   * In the absence of the parameter, all visible (users who aren't
 851                   * invisible (user mode +i) and who don't have a common channel
 852                   * with the requesting client) are listed.
 853                   *
 854                   * The same result can be achieved by using a [sic] of "0"
 855                   * or any wildcard which will end up matching every visible user.
 856                   *
 857                   * The [sic] passed to WHO is matched against users' host, server, real name and
 858                   * nickname if the channel cannot be found.
 859                   */
 860                 client_modes = Client_Modes(c);
 861                 if (strchr(client_modes, 'i'))
 862                         continue;
 863
 864                 if (only_ops && !strchr(client_modes, 'o'))
 865                         continue;
 866
 867                 if (have_arg) { /* match pattern against user host/server/name/nick */
 868                         client_match = MatchCaseInsensitive(pattern, Client_Hostname(c)); /* user's host */
 869                         if (!client_match)
 870                                 client_match = MatchCaseInsensitive(pattern, Client_ID(Client_Introducer(c))); /* server */
 871                         if (!client_match)
 872                                 client_match = Match(Req->argv[0], Client_Info(c)); /* realname */
 873                         if (!client_match)
 874                                 client_match = MatchCaseInsensitive(pattern, Client_ID(c)); /* nick name */
 875
 876                         if (!client_match) /* This isn't the client you're looking for */
 877                                 continue;
 878                 }
 879
 880                 strcpy(flags, who_flags_status(client_modes));
 881
 882                 if (strchr(client_modes, 'o')) /* this client is an operator */
 883                         strlcat(flags, "*", sizeof(flags));
 884
 885                 /* Search suitable channel */
 886                 cl2chan = Channel_FirstChannelOf(c);
 887                 while (cl2chan) {
 888                         cn = Channel_GetChannel(cl2chan);
 889                         if (Channel_IsMemberOf(cn, Client) ||
 890                                     !strchr(Channel_Modes(cn), 's'))
 891                         {
 892                                 channelname = Channel_Name(cn);
 893                                 break;
 894                         }
 895                         cl2chan = Channel_NextChannelOf(c, cl2chan);
 896                 }
 897                 if (cl2chan) {
 898                         chan = Channel_GetChannel(cl2chan);
 899                         chan_user_modes = Channel_UserModes(chan, c);
 900                         strlcat(flags, who_flags_qualifier(chan_user_modes), sizeof(flags));
 901                 } else
 902                         channelname = "*";
 903
 904                 if (!write_whoreply(Client, c, channelname, flags))
 905                         return DISCONNECTED;
 906         }
 907
 908         if (Req->argc > 0)
 909                 channelname = Req->argv[0];
 910         else
 911                 channelname = "*";
 912
 913         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client), channelname);
 914 } /* IRC_WHO */
 915
 916
 917 /**
 918  * Handler for the IRC "WHOIS" command.
 919  *
 920  * See RFC 2812, 3.6.2 "Whois query".
 921  *
 922  * @param Client        The client from which this command has been received.
 923  * @param Req           Request structure with prefix and all parameters.
 924  * @return              CONNECTED or DISCONNECTED.
 925  */
 926 GLOBAL bool
 927 IRC_WHOIS( CLIENT *Client, REQUEST *Req )
 928 {
 929         CLIENT *from, *target, *c;
 930         char str[LINE_LEN + 1];
 931         CL2CHAN *cl2chan;
 932         CHANNEL *chan;
 933
 934         assert( Client != NULL );
 935         assert( Req != NULL );
 936
 937         /* Bad number of parameters? */
 938         if (Req->argc < 1 || Req->argc > 2)
 939                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 940                                           Client_ID(Client), Req->command);
 941
 942         /* Search client */
 943         c = Client_Search(Req->argv[Req->argc - 1]);
 944         if (!c || (Client_Type(c) != CLIENT_USER
 945                    && Client_Type(c) != CLIENT_SERVICE))
 946                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 947                                           Client_ID(Client),
 948                                           Req->argv[Req->argc - 1]);
 949
 950         /* Search sender of the WHOIS */
 951         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 952         else from = Client;
 953         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 954
 955         /* Forward to other server? */
 956         if( Req->argc > 1 )
 957         {
 958                 /* Search target server (can be specified as nick of that server!) */
 959                 target = Client_Search( Req->argv[0] );
 960                 if( ! target ) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 961         }
 962         else target = Client_ThisServer( );
 963
 964         assert( target != NULL );
 965
 966         if(( Client_NextHop( target ) != Client_ThisServer( )) && ( Client_Type( Client_NextHop( target )) == CLIENT_SERVER )) return IRC_WriteStrClientPrefix( target, from, "WHOIS %s :%s", Req->argv[0], Req->argv[1] );
 967
 968         /* Nick, user, hostname and client info */
 969         if (!IRC_WriteStrClient(from, RPL_WHOISUSER_MSG, Client_ID(from),
 970                                 Client_ID(c), Client_User(c),
 971                                 Client_HostnameCloaked(c), Client_Info(c)))
 972                 return DISCONNECTED;
 973
 974         /* Server */
 975         if( ! IRC_WriteStrClient( from, RPL_WHOISSERVER_MSG, Client_ID( from ), Client_ID( c ), Client_ID( Client_Introducer( c )), Client_Info( Client_Introducer( c )))) return DISCONNECTED;
 976
 977         /* Channels */
 978         snprintf( str, sizeof( str ), RPL_WHOISCHANNELS_MSG, Client_ID( from ), Client_ID( c ));
 979         cl2chan = Channel_FirstChannelOf( c );
 980         while( cl2chan )
 981         {
 982                 chan = Channel_GetChannel( cl2chan );
 983                 assert( chan != NULL );
 984
 985                 /* next */
 986                 cl2chan = Channel_NextChannelOf( c, cl2chan );
 987
 988                 /* Secret channel? */
 989                 if (strchr(Channel_Modes(chan), 's')
 990                     && !Channel_IsMemberOf(chan, Client))
 991                         continue;
 992
 993                 /* Local channel and request is not from a user? */
 994                 if (Client_Type(Client) == CLIENT_SERVER
 995                     && Channel_IsLocal(chan))
 996                         continue;
 997
 998                 /* Concatenate channel names */
 999                 if( str[strlen( str ) - 1] != ':' ) strlcat( str, " ", sizeof( str ));
1000                 if( strchr( Channel_UserModes( chan, c ), 'o' )) strlcat( str, "@", sizeof( str ));
1001                 else if( strchr( Channel_UserModes( chan, c ), 'v' )) strlcat( str, "+", sizeof( str ));
1002                 strlcat( str, Channel_Name( chan ), sizeof( str ));
1003
1004                 if( strlen( str ) > ( LINE_LEN - CHANNEL_NAME_LEN - 4 ))
1005                 {
1006                         /* Line becomes too long: send it! */
1007                         if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1008                         snprintf( str, sizeof( str ), RPL_WHOISCHANNELS_MSG, Client_ID( from ), Client_ID( c ));
1009                 }
1010         }
1011         if( str[strlen( str ) - 1] != ':')
1012         {
1013                 /* There is data left to send: */
1014                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1015         }
1016
1017         /* IRC-Operator? */
1018         if( Client_HasMode( c, 'o' ))
1019         {
1020                 if( ! IRC_WriteStrClient( from, RPL_WHOISOPERATOR_MSG, Client_ID( from ), Client_ID( c ))) return DISCONNECTED;
1021         }
1022
1023         /* Connected using SSL? */
1024         if (Conn_UsesSSL(Client_Conn(c))) {
1025                 if (!IRC_WriteStrClient
1026                     (from, RPL_WHOISSSL_MSG, Client_ID(from), Client_ID(c)))
1027                         return DISCONNECTED;
1028         }
1029
1030         /* Idle and signon time (local clients only!) */
1031         if (Client_Conn(c) > NONE ) {
1032                 if (! IRC_WriteStrClient(from, RPL_WHOISIDLE_MSG,
1033                         Client_ID(from), Client_ID(c),
1034                         (unsigned long)Conn_GetIdle(Client_Conn(c)),
1035                         (unsigned long)Conn_GetSignon(Client_Conn(c))))
1036                                 return DISCONNECTED;
1037         }
1038
1039         /* Away? */
1040         if( Client_HasMode( c, 'a' ))
1041         {
1042                 if( ! IRC_WriteStrClient( from, RPL_AWAY_MSG, Client_ID( from ), Client_ID( c ), Client_Away( c ))) return DISCONNECTED;
1043         }
1044
1045         /* End of Whois */
1046         return IRC_WriteStrClient( from, RPL_ENDOFWHOIS_MSG, Client_ID( from ), Client_ID( c ));
1047 } /* IRC_WHOIS */
1048
1049
1050 static bool
1051 WHOWAS_EntryWrite(CLIENT *prefix, WHOWAS *entry)
1052 {
1053         char t_str[60];
1054
1055         (void)strftime(t_str, sizeof(t_str), "%a %b %d %H:%M:%S %Y",
1056                                         localtime(&entry->time));
1057
1058         if (!IRC_WriteStrClient(prefix, RPL_WHOWASUSER_MSG, Client_ID(prefix),
1059                         entry->id, entry->user, entry->host, entry->info))
1060                                 return DISCONNECTED;
1061
1062         return IRC_WriteStrClient(prefix, RPL_WHOISSERVER_MSG, Client_ID(prefix),
1063                   entry->id, entry->server, t_str);
1064 }
1065
1066 /**
1067  * IRC "WHOWAS" function.
1068  * This function implements the IRC command "WHOWHAS". It handles local
1069  * requests and request that should be forwarded to other servers.
1070  */
1071 GLOBAL bool
1072 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
1073 {
1074         CLIENT *target, *prefix;
1075         WHOWAS *whowas;
1076         char tok_buf[COMMAND_LEN];
1077         int max, last, count, i, nc;
1078         const char *nick;
1079
1080         assert( Client != NULL );
1081         assert( Req != NULL );
1082
1083         /* Wrong number of parameters? */
1084         if (Req->argc > 3)
1085                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1086                                         Client_ID(Client), Req->command);
1087         if (Req->argc < 1)
1088                 return IRC_WriteStrClient(Client, ERR_NONICKNAMEGIVEN_MSG, Client_ID(Client));
1089
1090         /* Search target */
1091         if (Req->argc == 3)
1092                 target = Client_Search(Req->argv[2]);
1093         else
1094                 target = Client_ThisServer();
1095
1096         /* Get prefix */
1097         if (Client_Type(Client) == CLIENT_SERVER)
1098                 prefix = Client_Search(Req->prefix);
1099         else
1100                 prefix = Client;
1101
1102         if (!prefix)
1103                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1104                                                 Client_ID(Client), Req->prefix);
1105
1106         /* Forward to other server? */
1107         if (target != Client_ThisServer()) {
1108                 if (!target || (Client_Type(target) != CLIENT_SERVER))
1109                         return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
1110                                         Client_ID(prefix), Req->argv[2]);
1111
1112                 /* Forward */
1113                 IRC_WriteStrClientPrefix( target, prefix, "WHOWAS %s %s %s",
1114                                           Req->argv[0], Req->argv[1],
1115                                           Req->argv[2] );
1116                 return CONNECTED;
1117         }
1118
1119         whowas = Client_GetWhowas( );
1120         last = Client_GetLastWhowasIndex( );
1121         if (last < 0)
1122                 last = 0;
1123
1124         max = DEFAULT_WHOWAS;
1125         if (Req->argc > 1) {
1126                 max = atoi(Req->argv[1]);
1127                 if (max < 1)
1128                         max = MAX_WHOWAS;
1129         }
1130
1131         /*
1132          * Break up the nick argument into a list of nicks, if applicable
1133          * Can't modify Req->argv[0] because we need it for RPL_ENDOFWHOWAS_MSG.
1134          */
1135         strlcpy(tok_buf, Req->argv[0], sizeof(tok_buf));
1136         nick = strtok(tok_buf, ",");
1137
1138         for (i=last, count=0; nick != NULL ; nick = strtok(NULL, ",")) {
1139                 nc = 0;
1140                 do {
1141                         /* Used entry? */
1142                         if (whowas[i].time > 0 && strcasecmp(nick, whowas[i].id) == 0) {
1143                                 if (!WHOWAS_EntryWrite(prefix, &whowas[i]))
1144                                         return DISCONNECTED;
1145                                 nc++;
1146                                 count++;
1147                         }
1148                         /* previous entry */
1149                         i--;
1150
1151                         /* "underflow", wrap around */
1152                         if (i < 0)
1153                                 i = MAX_WHOWAS - 1;
1154
1155                         if (nc && count >= max)
1156                                 break;
1157                 } while (i != last);
1158
1159                 if (nc == 0 && !IRC_WriteStrClient(prefix, ERR_WASNOSUCHNICK_MSG,
1160                                                 Client_ID(prefix), nick))
1161                         return DISCONNECTED;
1162         }
1163         return IRC_WriteStrClient(prefix, RPL_ENDOFWHOWAS_MSG, Client_ID(prefix), Req->argv[0]);
1164 } /* IRC_WHOWAS */
1165
1166
1167 GLOBAL bool
1168 IRC_Send_LUSERS( CLIENT *Client )
1169 {
1170         unsigned long cnt;
1171 #ifndef STRICT_RFC
1172         unsigned long max;
1173 #endif
1174
1175         assert( Client != NULL );
1176
1177         /* Users, services and serevers in the network */
1178         if( ! IRC_WriteStrClient( Client, RPL_LUSERCLIENT_MSG, Client_ID( Client ), Client_UserCount( ), Client_ServiceCount( ), Client_ServerCount( ))) return DISCONNECTED;
1179
1180         /* Number of IRC operators */
1181         cnt = Client_OperCount( );
1182         if( cnt > 0 )
1183         {
1184                 if( ! IRC_WriteStrClient( Client, RPL_LUSEROP_MSG, Client_ID( Client ), cnt )) return DISCONNECTED;
1185         }
1186
1187         /* Unknown connections */
1188         cnt = Client_UnknownCount( );
1189         if( cnt > 0 )
1190         {
1191                 if( ! IRC_WriteStrClient( Client, RPL_LUSERUNKNOWN_MSG, Client_ID( Client ), cnt )) return DISCONNECTED;
1192         }
1193
1194         /* Number of created channels */
1195         if( ! IRC_WriteStrClient( Client, RPL_LUSERCHANNELS_MSG, Client_ID( Client ), Channel_Count( ))) return DISCONNECTED;
1196
1197         /* Number of local users, services and servers */
1198         if( ! IRC_WriteStrClient( Client, RPL_LUSERME_MSG, Client_ID( Client ), Client_MyUserCount( ), Client_MyServiceCount( ), Client_MyServerCount( ))) return DISCONNECTED;
1199
1200 #ifndef STRICT_RFC
1201         /* Maximum number of local users */
1202         cnt = Client_MyUserCount();
1203         max = Client_MyMaxUserCount();
1204         if (! IRC_WriteStrClient(Client, RPL_LOCALUSERS_MSG, Client_ID(Client),
1205                         cnt, max, cnt, max))
1206                 return DISCONNECTED;
1207         /* Maximum number of users in the network */
1208         cnt = Client_UserCount();
1209         max = Client_MaxUserCount();
1210         if(! IRC_WriteStrClient(Client, RPL_NETUSERS_MSG, Client_ID(Client),
1211                         cnt, max, cnt, max))
1212                 return DISCONNECTED;
1213         /* Connection counters */
1214         if (! IRC_WriteStrClient(Client, RPL_STATSCONN_MSG, Client_ID(Client),
1215                         Conn_CountMax(), Conn_CountAccepted()))
1216                 return DISCONNECTED;
1217 #endif
1218
1219         return CONNECTED;
1220 } /* IRC_Send_LUSERS */
1221
1222
1223 static bool
1224 Show_MOTD_Start(CLIENT *Client)
1225 {
1226         return IRC_WriteStrClient(Client, RPL_MOTDSTART_MSG,
1227                 Client_ID( Client ), Client_ID( Client_ThisServer( )));
1228 }
1229
1230 static bool
1231 Show_MOTD_Sendline(CLIENT *Client, const char *msg)
1232 {
1233         return IRC_WriteStrClient(Client, RPL_MOTD_MSG, Client_ID( Client ), msg);
1234 }
1235
1236 static bool
1237 Show_MOTD_End(CLIENT *Client)
1238 {
1239         return IRC_WriteStrClient( Client, RPL_ENDOFMOTD_MSG, Client_ID( Client ));
1240 }
1241
1242 #ifdef SSL_SUPPORT
1243 static bool Show_MOTD_SSLInfo(CLIENT *Client)
1244 {
1245         bool ret = true;
1246         char buf[COMMAND_LEN] = "Connected using Cipher ";
1247
1248         if (!Conn_GetCipherInfo(Client_Conn(Client), buf + 23, sizeof buf - 23))
1249                 return true;
1250
1251         if (!Show_MOTD_Sendline(Client, buf))
1252                 ret = false;
1253
1254         return ret;
1255 }
1256 #else
1257 static inline bool
1258 Show_MOTD_SSLInfo(UNUSED CLIENT *c)
1259 { return true; }
1260 #endif
1261
1262 GLOBAL bool
1263 IRC_Show_MOTD( CLIENT *Client )
1264 {
1265         const char *line;
1266         size_t len_tot, len_str;
1267
1268         assert( Client != NULL );
1269
1270         len_tot = array_bytes(&Conf_Motd);
1271         if (len_tot == 0 && !Conn_UsesSSL(Client_Conn(Client)))
1272                 return IRC_WriteStrClient(Client, ERR_NOMOTD_MSG, Client_ID(Client));
1273
1274         if (!Show_MOTD_Start(Client))
1275                 return DISCONNECTED;
1276
1277         line = array_start(&Conf_Motd);
1278         while (len_tot > 0) {
1279                 len_str = strlen(line) + 1;
1280
1281                 assert(len_tot >= len_str);
1282                 len_tot -= len_str;
1283
1284                 if (!Show_MOTD_Sendline(Client, line))
1285                         return DISCONNECTED;
1286                 line += len_str;
1287         }
1288
1289         if (!Show_MOTD_SSLInfo(Client))
1290                 return DISCONNECTED;
1291         return Show_MOTD_End(Client);
1292 } /* IRC_Show_MOTD */
1293
1294
1295 GLOBAL bool
1296 IRC_Send_NAMES( CLIENT *Client, CHANNEL *Chan )
1297 {
1298         bool is_visible, is_member;
1299         char str[LINE_LEN + 1];
1300         CL2CHAN *cl2chan;
1301         CLIENT *cl;
1302
1303         assert( Client != NULL );
1304         assert( Chan != NULL );
1305
1306         if( Channel_IsMemberOf( Chan, Client )) is_member = true;
1307         else is_member = false;
1308
1309         /* Secret channel? */
1310         if( ! is_member && strchr( Channel_Modes( Chan ), 's' )) return CONNECTED;
1311
1312         /* Alle Mitglieder suchen */
1313         snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1314         cl2chan = Channel_FirstMember( Chan );
1315         while( cl2chan )
1316         {
1317                 cl = Channel_GetClient( cl2chan );
1318
1319                 if( strchr( Client_Modes( cl ), 'i' )) is_visible = false;
1320                 else is_visible = true;
1321
1322                 if( is_member || is_visible )
1323                 {
1324                         /* Nick anhaengen */
1325                         if( str[strlen( str ) - 1] != ':' ) strlcat( str, " ", sizeof( str ));
1326                         if( strchr( Channel_UserModes( Chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
1327                         else if( strchr( Channel_UserModes( Chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
1328                         strlcat( str, Client_ID( cl ), sizeof( str ));
1329
1330                         if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
1331                         {
1332                                 /* Zeile wird zu lang: senden! */
1333                                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1334                                 snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1335                         }
1336                 }
1337
1338                 /* naechstes Mitglied suchen */
1339                 cl2chan = Channel_NextMember( Chan, cl2chan );
1340         }
1341         if( str[strlen( str ) - 1] != ':')
1342         {
1343                 /* Es sind noch Daten da, die gesendet werden muessen */
1344                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1345         }
1346
1347         return CONNECTED;
1348 } /* IRC_Send_NAMES */
1349
1350
1351 /**
1352  * Send the ISUPPORT numeric (005).
1353  * This numeric indicates the features that are supported by this server.
1354  * See <http://www.irc.org/tech_docs/005.html> for details.
1355  */
1356 GLOBAL bool
1357 IRC_Send_ISUPPORT(CLIENT * Client)
1358 {
1359         if (!IRC_WriteStrClient(Client, RPL_ISUPPORT1_MSG, Client_ID(Client),
1360                                 Conf_MaxJoins))
1361                 return DISCONNECTED;
1362         return IRC_WriteStrClient(Client, RPL_ISUPPORT2_MSG, Client_ID(Client),
1363                                   CHANNEL_NAME_LEN - 1, Conf_MaxNickLength - 1,
1364                                   COMMAND_LEN - 23, CLIENT_AWAY_LEN - 1,
1365                                   COMMAND_LEN - 113);
1366 } /* IRC_Send_ISUPPORT */
1367
1368
1369 /* -eof- */