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 "class.h"
  32 #include "conf.h"
  33 #include "defines.h"
  34 #include "lists.h"
  35 #include "log.h"
  36 #include "messages.h"
  37 #include "match.h"
  38 #include "tool.h"
  39 #include "parse.h"
  40 #include "irc-write.h"
  41
  42 #include "exp.h"
  43 #include "irc-info.h"
  44
  45
  46 GLOBAL bool
  47 IRC_ADMIN(CLIENT *Client, REQUEST *Req )
  48 {
  49         CLIENT *target, *prefix;
  50
  51         assert( Client != NULL );
  52         assert( Req != NULL );
  53
  54         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  55
  56         /* find target ... */
  57         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
  58         else target = Client_ThisServer( );
  59
  60         /* find Prefix */
  61         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
  62         else prefix = Client;
  63         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  64
  65         /* forwad message to another server? */
  66         if( target != Client_ThisServer( ))
  67         {
  68                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
  69
  70                 /* forward */
  71                 IRC_WriteStrClientPrefix( target, prefix, "ADMIN %s", Req->argv[0] );
  72                 return CONNECTED;
  73         }
  74
  75         /* mit Versionsinfo antworten */
  76         if( ! IRC_WriteStrClient( Client, RPL_ADMINME_MSG, Client_ID( prefix ), Conf_ServerName )) return DISCONNECTED;
  77         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC1_MSG, Client_ID( prefix ), Conf_ServerAdmin1 )) return DISCONNECTED;
  78         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC2_MSG, Client_ID( prefix ), Conf_ServerAdmin2 )) return DISCONNECTED;
  79         if( ! IRC_WriteStrClient( Client, RPL_ADMINEMAIL_MSG, Client_ID( prefix ), Conf_ServerAdminMail )) return DISCONNECTED;
  80
  81         IRC_SetPenalty( Client, 1 );
  82         return CONNECTED;
  83 } /* IRC_ADMIN */
  84
  85
  86 /**
  87  * Handler for the IRC command "INFO".
  88  * See RFC 2812 section 3.4.10.
  89  */
  90 GLOBAL bool
  91 IRC_INFO(CLIENT * Client, REQUEST * Req)
  92 {
  93         CLIENT *target, *prefix;
  94         char msg[510];
  95
  96         assert(Client != NULL);
  97         assert(Req != NULL);
  98
  99         /* Wrong number of parameters? */
 100         if (Req->argc > 1)
 101                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 102                                           Client_ID(Client), Req->command);
 103
 104         /* Determine prefix */
 105         if (Client_Type(Client) == CLIENT_SERVER)
 106                 prefix = Client_Search(Req->prefix);
 107         else
 108                 prefix = Client;
 109         if (!prefix)
 110                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 111                                           Client_ID(Client), Req->prefix);
 112
 113         /* Look for a target */
 114         if (Req->argc > 0)
 115                 target = Client_Search(Req->argv[0]);
 116         else
 117                 target = Client_ThisServer();
 118
 119         /* Make sure that the target is a server */
 120         if (target && Client_Type(target) != CLIENT_SERVER)
 121                 target = Client_Introducer(target);
 122
 123         if (!target)
 124                 return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
 125                                           Client_ID(prefix), Req->argv[0]);
 126
 127         /* Pass on to another server? */
 128         if (target != Client_ThisServer()) {
 129                 IRC_WriteStrClientPrefix(target, prefix, "INFO %s",
 130                                          Req->argv[0]);
 131                 return CONNECTED;
 132         }
 133
 134         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix),
 135                                 NGIRCd_Version))
 136                 return DISCONNECTED;
 137
 138 #if defined(__DATE__) && defined(__TIME__)
 139         snprintf(msg, sizeof(msg), "Birth Date: %s at %s", __DATE__, __TIME__);
 140         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 141                 return DISCONNECTED;
 142 #endif
 143
 144         strlcpy(msg, "On-line since ", sizeof(msg));
 145         strlcat(msg, NGIRCd_StartStr, sizeof(msg));
 146         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 147                 return DISCONNECTED;
 148
 149         if (!IRC_WriteStrClient(Client, RPL_ENDOFINFO_MSG, Client_ID(prefix)))
 150                 return DISCONNECTED;
 151
 152         IRC_SetPenalty(Client, 2);
 153         return CONNECTED;
 154 } /* IRC_INFO */
 155
 156
 157 /**
 158  * Handler for the IRC "ISON" command.
 159  *
 160  * See RFC 2812, 4.9 "Ison message".
 161  *
 162  * @param Client The client from which this command has been received.
 163  * @param Req Request structure with prefix and all parameters.
 164  * @return CONNECTED or DISCONNECTED.
 165  */
 166 GLOBAL bool
 167 IRC_ISON( CLIENT *Client, REQUEST *Req )
 168 {
 169         char rpl[COMMAND_LEN];
 170         CLIENT *c;
 171         char *ptr;
 172         int i;
 173
 174         assert(Client != NULL);
 175         assert(Req != NULL);
 176
 177         /* Bad number of arguments? */
 178         if (Req->argc < 1)
 179                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 180                                           Client_ID(Client), Req->command);
 181
 182         strlcpy(rpl, RPL_ISON_MSG, sizeof rpl);
 183         for (i = 0; i < Req->argc; i++) {
 184                 /* "All" ircd even parse ":<x> <y> ..." arguments and split
 185                  * them up; so we do the same ... */
 186                 ptr = strtok(Req->argv[i], " ");
 187                 while (ptr) {
 188                         ngt_TrimStr(ptr);
 189                         c = Client_Search(ptr);
 190                         if (c && Client_Type(c) == CLIENT_USER) {
 191                                 strlcat(rpl, Client_ID(c), sizeof(rpl));
 192                                 strlcat(rpl, " ", sizeof(rpl));
 193                         }
 194                         ptr = strtok(NULL, " ");
 195                 }
 196         }
 197         ngt_TrimLastChr(rpl, ' ');
 198
 199         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 200 } /* IRC_ISON */
 201
 202
 203 /**
 204  * Handler for the IRC "LINKS" command.
 205  *
 206  * See RFC 2812, 3.4.5 "Links message".
 207  *
 208  * @param Client The client from which this command has been received.
 209  * @param Req Request structure with prefix and all parameters.
 210  * @return CONNECTED or DISCONNECTED.
 211  */
 212 GLOBAL bool
 213 IRC_LINKS(CLIENT *Client, REQUEST *Req)
 214 {
 215         CLIENT *target, *from, *c;
 216         char *mask;
 217
 218         assert(Client != NULL);
 219         assert(Req != NULL);
 220
 221         IRC_SetPenalty(Client, 1);
 222
 223         if (Req->argc > 2)
 224                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 225                                           Client_ID(Client), Req->command);
 226
 227         /* Get pointer to server mask or "*", if none given */
 228         if (Req->argc > 0)
 229                 mask = Req->argv[Req->argc - 1];
 230         else
 231                 mask = "*";
 232
 233         if (Client_Type(Client) == CLIENT_SERVER)
 234                 from = Client_Search(Req->prefix);
 235         else
 236                 from = Client;
 237         if (!from)
 238                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 239                                           Client_ID(Client), Req->prefix);
 240
 241         /* Forward? */
 242         if (Req->argc == 2) {
 243                 target = Client_Search(Req->argv[0]);
 244                 if (! target || Client_Type(target) != CLIENT_SERVER)
 245                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 246                                                   Client_ID(from),
 247                                                   Req->argv[0] );
 248                 else
 249                         if (target != Client_ThisServer())
 250                                 return IRC_WriteStrClientPrefix(target, from,
 251                                                 "LINKS %s %s", Req->argv[0],
 252                                                 Req->argv[1]);
 253         }
 254
 255         c = Client_First();
 256         while (c) {
 257                 if (Client_Type(c) == CLIENT_SERVER) {
 258                         if (!IRC_WriteStrClient(from, RPL_LINKS_MSG,
 259                                         Client_ID(from), Client_ID(c),
 260                                         Client_ID(Client_TopServer(c)
 261                                                   ? Client_TopServer(c)
 262                                                   : Client_ThisServer()),
 263                                         Client_Hops(c), Client_Info(c)))
 264                                 return DISCONNECTED;
 265                 }
 266                 c = Client_Next(c);
 267         }
 268         return IRC_WriteStrClient(from, RPL_ENDOFLINKS_MSG,
 269                                   Client_ID(from), mask);
 270 } /* IRC_LINKS */
 271
 272
 273 GLOBAL bool
 274 IRC_LUSERS( CLIENT *Client, REQUEST *Req )
 275 {
 276         CLIENT *target, *from;
 277
 278         assert( Client != NULL );
 279         assert( Req != NULL );
 280
 281         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 282
 283         /* Absender ermitteln */
 284         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 285         else from = Client;
 286         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 287
 288         /* An anderen Server forwarden? */
 289         if( Req->argc == 2 )
 290         {
 291                 target = Client_Search( Req->argv[1] );
 292                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 293                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LUSERS %s %s", Req->argv[0], Req->argv[1] );
 294         }
 295
 296         /* Wer ist der Absender? */
 297         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 298         else target = Client;
 299         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 300
 301         IRC_Send_LUSERS( target );
 302
 303         IRC_SetPenalty( target, 1 );
 304         return CONNECTED;
 305 } /* IRC_LUSERS */
 306
 307
 308 /**
 309  * Handler for the IRC command "SERVLIST".
 310  * List registered services, see RFC 2811, section 3.5.1: the syntax is
 311  * "SERVLIST [<mask> [<type>]]".
 312  */
 313 GLOBAL bool
 314 IRC_SERVLIST(CLIENT *Client, REQUEST *Req)
 315 {
 316         CLIENT *c;
 317
 318         assert(Client != NULL);
 319         assert(Req != NULL);
 320
 321         if (Req->argc > 2)
 322                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 323                                           Client_ID(Client), Req->command);
 324
 325         if (Req->argc < 2 || strcmp(Req->argv[1], "0") == 0) {
 326                 for (c = Client_First(); c!= NULL; c = Client_Next(c)) {
 327                         if (Client_Type(c) != CLIENT_SERVICE)
 328                                 continue;
 329                         if (Req->argc > 0 && !MatchCaseInsensitive(Req->argv[0],
 330                                                                   Client_ID(c)))
 331                                 continue;
 332                         if (!IRC_WriteStrClient(Client, RPL_SERVLIST_MSG,
 333                                         Client_ID(Client), Client_Mask(c),
 334                                         Client_Mask(Client_Introducer(c)), "*",
 335                                         0, Client_Hops(c), Client_Info(c)))
 336                                 return DISCONNECTED;
 337                 }
 338         }
 339
 340         return IRC_WriteStrClient(Client, RPL_SERVLISTEND_MSG, Client_ID(Client),
 341                                   Req->argc > 0 ? Req->argv[0] : "*",
 342                                   Req->argc > 1 ? Req->argv[1] : "0");
 343 } /* IRC_SERVLIST */
 344
 345
 346 GLOBAL bool
 347 IRC_MOTD( CLIENT *Client, REQUEST *Req )
 348 {
 349         CLIENT *from, *target;
 350
 351         assert( Client != NULL );
 352         assert( Req != NULL );
 353
 354         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 355
 356         /* From aus Prefix ermitteln */
 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 == 1 )
 362         {
 363                 /* forward? */
 364                 target = Client_Search( Req->argv[0] );
 365                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 366
 367                 if( target != Client_ThisServer( ))
 368                 {
 369                         /* Ok, anderer Server ist das Ziel: forwarden */
 370                         return IRC_WriteStrClientPrefix( target, from, "MOTD %s", Req->argv[0] );
 371                 }
 372         }
 373
 374         IRC_SetPenalty( from, 3 );
 375         return IRC_Show_MOTD( from );
 376 } /* IRC_MOTD */
 377
 378
 379 GLOBAL bool
 380 IRC_NAMES( CLIENT *Client, REQUEST *Req )
 381 {
 382         char rpl[COMMAND_LEN], *ptr;
 383         CLIENT *target, *from, *c;
 384         CHANNEL *chan;
 385
 386         assert( Client != NULL );
 387         assert( Req != NULL );
 388
 389         if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 390
 391         /* use prefix to determine "From" */
 392         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 393         else from = Client;
 394         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 395
 396         if( Req->argc == 2 )
 397         {
 398                 /* forward to another server? */
 399                 target = Client_Search( Req->argv[1] );
 400                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 401
 402                 if( target != Client_ThisServer( )) {
 403                         /* target is another server, forward */
 404                         return IRC_WriteStrClientPrefix( target, from, "NAMES %s :%s", Req->argv[0], Req->argv[1] );
 405                 }
 406         }
 407
 408         if( Req->argc > 0 )
 409         {
 410                 /* bestimmte Channels durchgehen */
 411                 ptr = strtok( Req->argv[0], "," );
 412                 while( ptr )
 413                 {
 414                         chan = Channel_Search( ptr );
 415                         if( chan )
 416                         {
 417                                 /* print name */
 418                                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 419                         }
 420                         if( ! IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), ptr )) return DISCONNECTED;
 421
 422                         /* get next channel name */
 423                         ptr = strtok( NULL, "," );
 424                 }
 425                 return CONNECTED;
 426         }
 427
 428         chan = Channel_First( );
 429         while( chan )
 430         {
 431                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 432
 433                 chan = Channel_Next( chan );
 434         }
 435
 436         /* Now print all clients which are not in any channel */
 437         c = Client_First( );
 438         snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 439         while( c )
 440         {
 441                 if(( Client_Type( c ) == CLIENT_USER ) && ( Channel_FirstChannelOf( c ) == NULL ) && ( ! strchr( Client_Modes( c ), 'i' )))
 442                 {
 443                         /* its a user, concatenate ... */
 444                         if( rpl[strlen( rpl ) - 1] != ':' ) strlcat( rpl, " ", sizeof( rpl ));
 445                         strlcat( rpl, Client_ID( c ), sizeof( rpl ));
 446
 447                         if( strlen( rpl ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
 448                         {
 449                                 /* Line is gwoing too long, send now */
 450                                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 451                                 snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 452                         }
 453                 }
 454
 455                 c = Client_Next( c );
 456         }
 457         if( rpl[strlen( rpl ) - 1] != ':')
 458         {
 459                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 460         }
 461
 462         IRC_SetPenalty( from, 1 );
 463         return IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), "*" );
 464 } /* IRC_NAMES */
 465
 466
 467 static unsigned int
 468 t_diff(time_t *t, const time_t d)
 469 {
 470         time_t diff, remain;
 471
 472         diff = *t / d;
 473         remain = diff * d;
 474         *t -= remain;
 475
 476         return (unsigned int)diff;
 477 }
 478
 479
 480 static unsigned int
 481 uptime_days(time_t *now)
 482 {
 483         return t_diff(now, 60 * 60 * 24);
 484 }
 485
 486
 487 static unsigned int
 488 uptime_hrs(time_t *now)
 489 {
 490         return t_diff(now, 60 * 60);
 491 }
 492
 493
 494 static unsigned int
 495 uptime_mins(time_t *now)
 496 {
 497          return t_diff(now, 60);
 498 }
 499
 500
 501 /**
 502  * Handler for the IRC command "STATS".
 503  * See RFC 2812 section 3.4.4.
 504  */
 505 GLOBAL bool
 506 IRC_STATS( CLIENT *Client, REQUEST *Req )
 507 {
 508         CLIENT *from, *target, *cl;
 509         CONN_ID con;
 510         char query;
 511         COMMAND *cmd;
 512         time_t time_now;
 513         unsigned int days, hrs, mins;
 514         struct list_head *list;
 515         struct list_elem *list_item;
 516
 517         assert(Client != NULL);
 518         assert(Req != NULL);
 519
 520         if (Req->argc > 2)
 521                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 522                                           Client_ID(Client), Req->command);
 523
 524         /* use prefix to determine "From" */
 525         if (Client_Type(Client) == CLIENT_SERVER)
 526                 from = Client_Search(Req->prefix);
 527         else
 528                 from = Client;
 529
 530         if (!from)
 531                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 532                                           Client_ID(Client), Req->prefix);
 533
 534         if (Req->argc == 2) {
 535                 /* forward to another server? */
 536                 target = Client_Search(Req->argv[1]);
 537                 if ((!target) || (Client_Type(target) != CLIENT_SERVER))
 538                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 539                                                  Client_ID(from), Req->argv[1]);
 540
 541                 if (target != Client_ThisServer()) {
 542                         /* forward to another server */
 543                         return IRC_WriteStrClientPrefix(target, from,
 544                                      "STATS %s %s", Req->argv[0], Req->argv[1]);
 545                 }
 546         }
 547
 548         if (Req->argc > 0)
 549                 query = Req->argv[0][0] ? Req->argv[0][0] : '*';
 550         else
 551                 query = '*';
 552
 553         switch (query) {
 554         case 'g':       /* Network-wide bans ("G-Lines") */
 555         case 'G':
 556         case 'k':       /* Server-local bans ("K-Lines") */
 557         case 'K':
 558                 if (!Client_HasMode(from, 'o'))
 559                     return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
 560                                               Client_ID(from));
 561                 if (query == 'g' || query == 'G')
 562                         list = Class_GetList(CLASS_GLINE);
 563                 else
 564                         list = Class_GetList(CLASS_KLINE);
 565                         list_item = Lists_GetFirst(list);
 566                         while (list_item) {
 567                                 if (!IRC_WriteStrClient(from, RPL_STATSXLINE_MSG,
 568                                                 Client_ID(from), query,
 569                                                 Lists_GetMask(list_item),
 570                                                 Lists_GetValidity(list_item),
 571                                                 Lists_GetReason(list_item)))
 572                                         return DISCONNECTED;
 573                                 list_item = Lists_GetNext(list_item);
 574                         }
 575                 break;
 576         case 'l':       /* Link status (servers and own link) */
 577         case 'L':
 578                 time_now = time(NULL);
 579                 for (con = Conn_First(); con != NONE; con = Conn_Next(con)) {
 580                         cl = Conn_GetClient(con);
 581                         if (!cl)
 582                                 continue;
 583                         if ((Client_Type(cl) == CLIENT_SERVER)
 584                             || (cl == Client)) {
 585                                 /* Server link or our own connection */
 586 #ifdef ZLIB
 587                                 if (Conn_Options(con) & CONN_ZIP) {
 588                                         if (!IRC_WriteStrClient
 589                                             (from, RPL_STATSLINKINFOZIP_MSG,
 590                                              Client_ID(from), Client_Mask(cl),
 591                                              Conn_SendQ(con), Conn_SendMsg(con),
 592                                              Zip_SendBytes(con),
 593                                              Conn_SendBytes(con),
 594                                              Conn_RecvMsg(con),
 595                                              Zip_RecvBytes(con),
 596                                              Conn_RecvBytes(con),
 597                                              (long)(time_now - Conn_StartTime(con))))
 598                                                 return DISCONNECTED;
 599                                         continue;
 600                                 }
 601 #endif
 602                                 if (!IRC_WriteStrClient
 603                                     (from, RPL_STATSLINKINFO_MSG,
 604                                      Client_ID(from), Client_Mask(cl),
 605                                      Conn_SendQ(con), Conn_SendMsg(con),
 606                                      Conn_SendBytes(con), Conn_RecvMsg(con),
 607                                      Conn_RecvBytes(con),
 608                                      (long)(time_now - Conn_StartTime(con))))
 609                                         return DISCONNECTED;
 610                         }
 611                 }
 612                 break;
 613         case 'm':       /* IRC command status (usage count) */
 614         case 'M':
 615                 cmd = Parse_GetCommandStruct();
 616                 for (; cmd->name; cmd++) {
 617                         if (cmd->lcount == 0 && cmd->rcount == 0)
 618                                 continue;
 619                         if (!IRC_WriteStrClient
 620                             (from, RPL_STATSCOMMANDS_MSG, Client_ID(from),
 621                              cmd->name, cmd->lcount, cmd->bytes, cmd->rcount))
 622                                 return DISCONNECTED;
 623                 }
 624                 break;
 625         case 'u':       /* Server uptime */
 626         case 'U':
 627                 time_now = time(NULL) - NGIRCd_Start;
 628                 days = uptime_days(&time_now);
 629                 hrs = uptime_hrs(&time_now);
 630                 mins = uptime_mins(&time_now);
 631                 if (!IRC_WriteStrClient(from, RPL_STATSUPTIME, Client_ID(from),
 632                                        days, hrs, mins, (unsigned int)time_now))
 633                         return DISCONNECTED;
 634                 break;
 635         }
 636
 637         IRC_SetPenalty(from, 2);
 638         return IRC_WriteStrClient(from, RPL_ENDOFSTATS_MSG,
 639                                   Client_ID(from), query);
 640 } /* IRC_STATS */
 641
 642
 643 /**
 644  * Handler for the IRC command "SUMMON".
 645  * See RFC 2812 section 4.5. ngIRCd doesn't implement this functionality and
 646  * therefore answers with ERR_SUMMONDISABLED.
 647  */
 648 GLOBAL bool
 649 IRC_SUMMON(CLIENT * Client, REQUEST * Req)
 650 {
 651         return IRC_WriteStrClient(Client, ERR_SUMMONDISABLED_MSG,
 652                                   Client_ID(Client), Req->command);
 653 } /* IRC_SUMMON */
 654
 655
 656 GLOBAL bool
 657 IRC_TIME( CLIENT *Client, REQUEST *Req )
 658 {
 659         CLIENT *from, *target;
 660         char t_str[64];
 661         time_t t;
 662
 663         assert( Client != NULL );
 664         assert( Req != NULL );
 665
 666         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 667
 668         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 669         else from = Client;
 670         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 671
 672         if( Req->argc == 1 )
 673         {
 674                 target = Client_Search( Req->argv[0] );
 675                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[0] );
 676
 677                 if( target != Client_ThisServer( ))
 678                 {
 679                         return IRC_WriteStrClientPrefix( target, from, "TIME %s", Req->argv[0] );
 680                 }
 681         }
 682
 683         t = time( NULL );
 684         (void)strftime( t_str, 60, "%A %B %d %Y -- %H:%M %Z", localtime( &t ));
 685         return IRC_WriteStrClient( from, RPL_TIME_MSG, Client_ID( from ), Client_ID( Client_ThisServer( )), t_str );
 686 } /* IRC_TIME */
 687
 688
 689 /**
 690  * Handler for the IRC command "USERHOST".
 691  * See RFC 2812 section 4.8.
 692  */
 693 GLOBAL bool
 694 IRC_USERHOST(CLIENT *Client, REQUEST *Req)
 695 {
 696         char rpl[COMMAND_LEN];
 697         CLIENT *c;
 698         int max, i;
 699
 700         assert(Client != NULL);
 701         assert(Req != NULL);
 702
 703         if ((Req->argc < 1))
 704                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 705                                           Client_ID(Client), Req->command);
 706
 707         if (Req->argc > 5)
 708                 max = 5;
 709         else
 710                 max = Req->argc;
 711
 712         strlcpy(rpl, RPL_USERHOST_MSG, sizeof rpl);
 713         for (i = 0; i < max; i++) {
 714                 c = Client_Search(Req->argv[i]);
 715                 if (c && (Client_Type(c) == CLIENT_USER)) {
 716                         /* This Nick is "online" */
 717                         strlcat(rpl, Client_ID(c), sizeof(rpl));
 718                         if (Client_HasMode(c, 'o'))
 719                                 strlcat(rpl, "*", sizeof(rpl));
 720                         strlcat(rpl, "=", sizeof(rpl));
 721                         if (Client_HasMode(c, 'a'))
 722                                 strlcat(rpl, "-", sizeof(rpl));
 723                         else
 724                                 strlcat(rpl, "+", sizeof(rpl));
 725                         strlcat(rpl, Client_User(c), sizeof(rpl));
 726                         strlcat(rpl, "@", sizeof(rpl));
 727                         strlcat(rpl, Client_HostnameCloaked(c), sizeof(rpl));
 728                         strlcat(rpl, " ", sizeof(rpl));
 729                 }
 730         }
 731         ngt_TrimLastChr(rpl, ' ');
 732
 733         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 734 } /* IRC_USERHOST */
 735
 736
 737 /**
 738  * Handler for the IRC command "USERS".
 739  * See RFC 2812 section 4.6. As suggested there the command is disabled.
 740  */
 741 GLOBAL bool
 742 IRC_USERS(CLIENT * Client, REQUEST * Req)
 743 {
 744         return IRC_WriteStrClient(Client, ERR_USERSDISABLED_MSG,
 745                                   Client_ID(Client), Req->command);
 746 } /* IRC_USERS */
 747
 748
 749 GLOBAL bool
 750 IRC_VERSION( CLIENT *Client, REQUEST *Req )
 751 {
 752         CLIENT *target, *prefix;
 753
 754         assert( Client != NULL );
 755         assert( Req != NULL );
 756
 757         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 758
 759         /* Ziel suchen */
 760         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
 761         else target = Client_ThisServer( );
 762
 763         /* Prefix ermitteln */
 764         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
 765         else prefix = Client;
 766         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 767
 768         /* An anderen Server weiterleiten? */
 769         if( target != Client_ThisServer( ))
 770         {
 771                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
 772
 773                 /* forwarden */
 774                 IRC_WriteStrClientPrefix( target, prefix, "VERSION %s", Req->argv[0] );
 775                 return CONNECTED;
 776         }
 777
 778         /* send version information */
 779         IRC_SetPenalty(Client, 1);
 780         return IRC_WriteStrClient(Client, RPL_VERSION_MSG, Client_ID(prefix),
 781                                   PACKAGE_NAME, PACKAGE_VERSION,
 782                                   NGIRCd_DebugLevel, Conf_ServerName,
 783                                   NGIRCd_VersionAddition);
 784 } /* IRC_VERSION */
 785
 786
 787 static bool
 788 write_whoreply(CLIENT *Client, CLIENT *c, const char *channelname, const char *flags)
 789 {
 790         return IRC_WriteStrClient(Client, RPL_WHOREPLY_MSG, Client_ID(Client),
 791                                   channelname, Client_User(c),
 792                                   Client_HostnameCloaked(c),
 793                                   Client_ID(Client_Introducer(c)), Client_ID(c),
 794                                   flags, Client_Hops(c), Client_Info(c));
 795 }
 796
 797
 798 static const char *
 799 who_flags_status(const char *client_modes)
 800 {
 801         if (strchr(client_modes, 'a'))
 802                 return "G"; /* away */
 803         return "H";
 804 }
 805
 806
 807 static const char *
 808 who_flags_qualifier(const char *chan_user_modes)
 809 {
 810         if (strchr(chan_user_modes, 'o'))
 811                 return "@";
 812         else if (strchr(chan_user_modes, 'v'))
 813                 return "+";
 814         return "";
 815 }
 816
 817
 818 /**
 819  * Send WHO reply for a "channel target" ("WHO #channel").
 820  *
 821  * @param Client Client requesting the information.
 822  * @param Chan Channel being requested.
 823  * @param OnlyOps Only display IRC operators.
 824  * @return CONNECTED or DISCONNECTED.
 825  */
 826 static bool
 827 IRC_WHO_Channel(CLIENT *Client, CHANNEL *Chan, bool OnlyOps)
 828 {
 829         bool is_visible, is_member, is_ircop;
 830         CL2CHAN *cl2chan;
 831         const char *client_modes;
 832         const char *chan_user_modes;
 833         char flags[8];
 834         CLIENT *c;
 835
 836         assert( Client != NULL );
 837         assert( Chan != NULL );
 838
 839         is_member = Channel_IsMemberOf(Chan, Client);
 840
 841         /* Secret channel? */
 842         if (!is_member && strchr(Channel_Modes(Chan), 's'))
 843                 return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG,
 844                                           Client_ID(Client), Channel_Name(Chan));
 845
 846         cl2chan = Channel_FirstMember(Chan);
 847         for (; cl2chan ; cl2chan = Channel_NextMember(Chan, cl2chan)) {
 848                 c = Channel_GetClient(cl2chan);
 849
 850                 client_modes = Client_Modes(c);
 851                 is_ircop = strchr(client_modes, 'o') != NULL;
 852                 if (OnlyOps && !is_ircop)
 853                         continue;
 854
 855                 is_visible = strchr(client_modes, 'i') == NULL;
 856                 if (is_member || is_visible) {
 857                         strcpy(flags, who_flags_status(client_modes));
 858                         if (is_ircop)
 859                                 strlcat(flags, "*", sizeof(flags));
 860
 861                         chan_user_modes = Channel_UserModes(Chan, c);
 862                         strlcat(flags, who_flags_qualifier(chan_user_modes),
 863                                 sizeof(flags));
 864
 865                         if (!write_whoreply(Client, c, Channel_Name(Chan),
 866                                             flags))
 867                                 return DISCONNECTED;
 868                 }
 869         }
 870         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 871                                   Channel_Name(Chan));
 872 }
 873
 874
 875 /**
 876  * Send WHO reply for a "mask target" ("WHO m*sk").
 877  *
 878  * @param Client Client requesting the information.
 879  * @param Mask Mask being requested or NULL for "all" clients.
 880  * @param OnlyOps Only display IRC operators.
 881  * @return CONNECTED or DISCONNECTED.
 882  */
 883 static bool
 884 IRC_WHO_Mask(CLIENT *Client, char *Mask, bool OnlyOps)
 885 {
 886         CLIENT *c;
 887         CL2CHAN *cl2chan;
 888         CHANNEL *chan;
 889         bool client_match, is_visible;
 890         char flags[4];
 891
 892         assert (Client != NULL);
 893
 894         if (Mask)
 895                 ngt_LowerStr(Mask);
 896
 897         for (c = Client_First(); c != NULL; c = Client_Next(c)) {
 898                 if (Client_Type(c) != CLIENT_USER)
 899                         continue;
 900
 901                 if (OnlyOps && !Client_HasMode(c, 'o'))
 902                         continue;
 903
 904                 if (Mask) {
 905                         /* Match pattern against user host/server/name/nick */
 906                         client_match = MatchCaseInsensitive(Mask,
 907                                                 Client_Hostname(c));
 908                         if (!client_match)
 909                                 client_match = MatchCaseInsensitive(Mask,
 910                                                 Client_ID(Client_Introducer(c)));
 911                         if (!client_match)
 912                                 client_match = MatchCaseInsensitive(Mask,
 913                                                 Client_Info(c));
 914                         if (!client_match)
 915                                 client_match = MatchCaseInsensitive(Mask,
 916                                                 Client_ID(c));
 917                         if (!client_match)
 918                                 continue;       /* no match: skip this client */
 919                 }
 920
 921                 is_visible = !Client_HasMode(c, 'i');
 922
 923                 /* Target client is invisible, but mask matches exactly? */
 924                 if (!is_visible && Mask && strcasecmp(Client_ID(c), Mask) == 0)
 925                         is_visible = true;
 926
 927                 /* Target still invisible, but are both on the same channel? */
 928                 if (!is_visible) {
 929                         cl2chan = Channel_FirstChannelOf(Client);
 930                         while (cl2chan && !is_visible) {
 931                                 chan = Channel_GetChannel(cl2chan);
 932                                 if (Channel_IsMemberOf(chan, c))
 933                                         is_visible = true;
 934                                 cl2chan = Channel_NextChannelOf(Client, cl2chan);
 935                         }
 936                 }
 937
 938                 if (!is_visible)        /* target user is not visible */
 939                         continue;
 940
 941                 strcpy(flags, who_flags_status(Client_Modes(c)));
 942                 if (strchr(Client_Modes(c), 'o'))
 943                         strlcat(flags, "*", sizeof(flags));
 944
 945                 if (!write_whoreply(Client, c, "*", flags))
 946                         return DISCONNECTED;
 947
 948         }
 949
 950         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 951                                   Mask ? Mask : "*");
 952 }
 953
 954
 955 /**
 956  * Handler for the IRC "WHO" command.
 957  *
 958  * See RFC 2812, 3.6.1 "Who query".
 959  *
 960  * @param Client The client from which this command has been received.
 961  * @param Req Request structure with prefix and all parameters.
 962  * @return CONNECTED or DISCONNECTED.
 963  */
 964 GLOBAL bool
 965 IRC_WHO(CLIENT *Client, REQUEST *Req)
 966 {
 967         bool only_ops;
 968         CHANNEL *chan;
 969
 970         assert (Client != NULL);
 971         assert (Req != NULL);
 972
 973         if (Req->argc > 2)
 974                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 975                                           Client_ID(Client), Req->command);
 976
 977         only_ops = false;
 978
 979         if (Req->argc == 2) {
 980                 if (strcmp(Req->argv[1], "o") == 0)
 981                         only_ops = true;
 982 #ifdef STRICT_RFC
 983                 else
 984                         return IRC_WriteStrClient(Client,
 985                                                   ERR_NEEDMOREPARAMS_MSG,
 986                                                   Client_ID(Client),
 987                                                   Req->command);
 988 #endif
 989         }
 990
 991         IRC_SetPenalty(Client, 1);
 992         if (Req->argc >= 1) {
 993                 /* Channel or mask given */
 994                 chan = Channel_Search(Req->argv[0]);
 995                 if (chan) {
 996                         /* Members of a channel have been requested */
 997                         IRC_SetPenalty(Client, 1);
 998                         return IRC_WHO_Channel(Client, chan, only_ops);
 999                 }
1000                 if (strcmp(Req->argv[0], "0") != 0) {
1001                         /* A mask has been given. But please note this RFC
1002                          * stupidity: "0" is same as no arguments ... */
1003                         IRC_SetPenalty(Client, 3);
1004                         return IRC_WHO_Mask(Client, Req->argv[0], only_ops);
1005                 }
1006         }
1007
1008         /* No channel or (valid) mask given */
1009         IRC_SetPenalty(Client, 2);
1010         return IRC_WHO_Mask(Client, NULL, only_ops);
1011 } /* IRC_WHO */
1012
1013
1014 /**
1015  * Generate WHOIS reply of one actual client.
1016  *
1017  * @param Client        The client from which this command has been received.
1018  * @param from          The client requesting the information ("originator").
1019  * @param c             The client of which information should be returned.
1020  * @returns             CONNECTED or DISCONNECTED.
1021  */
1022 static bool
1023 IRC_WHOIS_SendReply(CLIENT *Client, CLIENT *from, CLIENT *c)
1024 {
1025         char str[LINE_LEN + 1];
1026         CL2CHAN *cl2chan;
1027         CHANNEL *chan;
1028
1029         /* Nick, user, hostname and client info */
1030         if (!IRC_WriteStrClient(from, RPL_WHOISUSER_MSG, Client_ID(from),
1031                                 Client_ID(c), Client_User(c),
1032                                 Client_HostnameCloaked(c), Client_Info(c)))
1033                 return DISCONNECTED;
1034
1035         /* Server */
1036         if (!IRC_WriteStrClient(from, RPL_WHOISSERVER_MSG, Client_ID(from),
1037                                 Client_ID(c), Client_ID(Client_Introducer(c)),
1038                                 Client_Info(Client_Introducer(c))))
1039                 return DISCONNECTED;
1040
1041         /* Channels */
1042         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1043                  Client_ID(from), Client_ID(c));
1044         cl2chan = Channel_FirstChannelOf(c);
1045         while (cl2chan) {
1046                 chan = Channel_GetChannel(cl2chan);
1047                 assert(chan != NULL);
1048
1049                 /* next */
1050                 cl2chan = Channel_NextChannelOf(c, cl2chan);
1051
1052                 /* Secret channel? */
1053                 if (strchr(Channel_Modes(chan), 's')
1054                     && !Channel_IsMemberOf(chan, Client))
1055                         continue;
1056
1057                 /* Local channel and request is not from a user? */
1058                 if (Client_Type(Client) == CLIENT_SERVER
1059                     && Channel_IsLocal(chan))
1060                         continue;
1061
1062                 /* Concatenate channel names */
1063                 if (str[strlen(str) - 1] != ':')
1064                         strlcat(str, " ", sizeof(str));
1065
1066                 strlcat(str, who_flags_qualifier(Channel_UserModes(chan, c)),
1067                                                  sizeof(str));
1068                 strlcat(str, Channel_Name(chan), sizeof(str));
1069
1070                 if (strlen(str) > (LINE_LEN - CHANNEL_NAME_LEN - 4)) {
1071                         /* Line becomes too long: send it! */
1072                         if (!IRC_WriteStrClient(Client, "%s", str))
1073                                 return DISCONNECTED;
1074                         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1075                                  Client_ID(from), Client_ID(c));
1076                 }
1077         }
1078         if(str[strlen(str) - 1] != ':') {
1079                 /* There is data left to send: */
1080                 if (!IRC_WriteStrClient(Client, "%s", str))
1081                         return DISCONNECTED;
1082         }
1083
1084         /* IRC-Operator? */
1085         if (Client_HasMode(c, 'o') &&
1086                 !IRC_WriteStrClient(from, RPL_WHOISOPERATOR_MSG,
1087                                     Client_ID(from), Client_ID(c)))
1088                         return DISCONNECTED;
1089
1090         /* Connected using SSL? */
1091         if (Conn_UsesSSL(Client_Conn(c)) &&
1092                 !IRC_WriteStrClient(from, RPL_WHOISSSL_MSG,
1093                                     Client_ID(from), Client_ID(c)))
1094                         return DISCONNECTED;
1095
1096         /* Idle and signon time (local clients only!) */
1097         if (!Conf_MorePrivacy && Client_Conn(c) > NONE &&
1098                 !IRC_WriteStrClient(from, RPL_WHOISIDLE_MSG,
1099                                     Client_ID(from), Client_ID(c),
1100                                     (unsigned long)Conn_GetIdle(Client_Conn(c)),
1101                                     (unsigned long)Conn_GetSignon(Client_Conn(c))))
1102                         return DISCONNECTED;
1103
1104         /* Away? */
1105         if (Client_HasMode(c, 'a') &&
1106                 !IRC_WriteStrClient(from, RPL_AWAY_MSG,
1107                                     Client_ID(from), Client_ID(c),
1108                                     Client_Away(c)))
1109                         return DISCONNECTED;
1110
1111         return IRC_WriteStrClient(from, RPL_ENDOFWHOIS_MSG,
1112                                   Client_ID(from), Client_ID(c));
1113 } /* IRC_WHOIS_SendReply */
1114
1115
1116 /**
1117  * Handler for the IRC "WHOIS" command.
1118  *
1119  * See RFC 2812, 3.6.2 "Whois query".
1120  *
1121  * @param Client        The client from which this command has been received.
1122  * @param Req           Request structure with prefix and all parameters.
1123  * @return              CONNECTED or DISCONNECTED.
1124  */
1125 GLOBAL bool
1126 IRC_WHOIS( CLIENT *Client, REQUEST *Req )
1127 {
1128         CLIENT *from, *target, *c;
1129         unsigned int match_count = 0, found = 0;
1130         bool has_wildcards, is_remote;
1131         bool got_wildcard = false;
1132         const char *query;
1133
1134         assert( Client != NULL );
1135         assert( Req != NULL );
1136
1137         /* Bad number of parameters? */
1138         if (Req->argc < 1 || Req->argc > 2)
1139                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1140                                           Client_ID(Client), Req->command);
1141
1142         /* Search sender of the WHOIS */
1143         if (Client_Type(Client) == CLIENT_SERVER) {
1144                 from = Client_Search(Req->prefix);
1145         } else {
1146                 IRC_SetPenalty(Client, 1);
1147                 from = Client;
1148         }
1149         if (!from)
1150                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1151                                           Client_ID(Client), Req->prefix);
1152
1153         /* Get target server for this command */
1154         if (Req->argc > 1) {
1155                 /* Search the target server, which can be specified as a
1156                  * nick name on that server as well: */
1157                 target = Client_Search(Req->argv[0]);
1158                 if (!target)
1159                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
1160                                                 Client_ID(from), Req->argv[0]);
1161         } else
1162                 target = Client_ThisServer();
1163         assert(target != NULL);
1164
1165         /* Forward to other server? */
1166         if (Client_NextHop(target) != Client_ThisServer() &&
1167             Client_Type(Client_NextHop(target)) == CLIENT_SERVER)
1168                 return IRC_WriteStrClientPrefix(target, from,
1169                                                 "WHOIS %s :%s",
1170                                                 Req->argv[0], Req->argv[1]);
1171
1172         is_remote = Client_Conn(from) < 0;
1173         for (query = strtok(Req->argv[Req->argc - 1], ",");
1174                         query && found < 3;
1175                         query = strtok(NULL, ","), found++)
1176         {
1177                 has_wildcards = query[strcspn(query, "*?")] != 0;
1178                 /*
1179                  * follows ircd 2.10 implementation:
1180                  *  - handle up to 3 targets
1181                  *  - no wildcards for remote clients
1182                  *  - only one wildcard target per local client
1183                  *
1184                  *  also, at most ten matches are returned.
1185                  */
1186                 if (!has_wildcards || is_remote) {
1187                         c = Client_Search(query);
1188                         if (c) {
1189                                 if (!IRC_WHOIS_SendReply(Client, from, c))
1190                                         return DISCONNECTED;
1191                         } else {
1192                                 if (!IRC_WriteStrClient(Client,
1193                                                         ERR_NOSUCHNICK_MSG,
1194                                                         Client_ID(Client),
1195                                                         query))
1196                                         return DISCONNECTED;
1197                         }
1198                         continue;
1199                 }
1200                 if (got_wildcard) {
1201                         /* we already handled one wildcard query */
1202                         if (!IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1203                              Client_ID(Client), query))
1204                                 return DISCONNECTED;
1205                         continue;
1206                 }
1207                 got_wildcard = true;
1208                 IRC_SetPenalty(Client, 3);
1209
1210                 for (c = Client_First(); c && match_count < 10; c = Client_Next(c)) {
1211                         if (Client_Type(c) != CLIENT_USER)
1212                                 continue;
1213                         if (!MatchCaseInsensitive(query, Client_ID(c)))
1214                                 continue;
1215                         if (!IRC_WHOIS_SendReply(Client, from, c))
1216                                 return DISCONNECTED;
1217                         match_count++;
1218                 }
1219
1220                 if (match_count == 0)
1221                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1222                                 Client_ID(Client), Req->argv[Req->argc - 1]);
1223         }
1224         return CONNECTED;
1225 } /* IRC_WHOIS */
1226
1227
1228 static bool
1229 WHOWAS_EntryWrite(CLIENT *prefix, WHOWAS *entry)
1230 {
1231         char t_str[60];
1232
1233         (void)strftime(t_str, sizeof(t_str), "%a %b %d %H:%M:%S %Y",
1234                                         localtime(&entry->time));
1235
1236         if (!IRC_WriteStrClient(prefix, RPL_WHOWASUSER_MSG, Client_ID(prefix),
1237                         entry->id, entry->user, entry->host, entry->info))
1238                                 return DISCONNECTED;
1239
1240         return IRC_WriteStrClient(prefix, RPL_WHOISSERVER_MSG, Client_ID(prefix),
1241                   entry->id, entry->server, t_str);
1242 }
1243
1244 /**
1245  * IRC "WHOWAS" function.
1246  * This function implements the IRC command "WHOWHAS". It handles local
1247  * requests and request that should be forwarded to other servers.
1248  */
1249 GLOBAL bool
1250 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
1251 {
1252         CLIENT *target, *prefix;
1253         WHOWAS *whowas;
1254         char tok_buf[COMMAND_LEN];
1255         int max, last, count, i, nc;
1256         const char *nick;
1257
1258         assert( Client != NULL );
1259         assert( Req != NULL );
1260
1261         /* Do not reveal any info on disconnected users? */
1262         if (Conf_MorePrivacy)
1263                 return CONNECTED;
1264
1265         /* Wrong number of parameters? */
1266         if (Req->argc > 3)
1267                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1268                                         Client_ID(Client), Req->command);
1269         if (Req->argc < 1)
1270                 return IRC_WriteStrClient(Client, ERR_NONICKNAMEGIVEN_MSG, Client_ID(Client));
1271
1272         /* Search target */
1273         if (Req->argc == 3)
1274                 target = Client_Search(Req->argv[2]);
1275         else
1276                 target = Client_ThisServer();
1277
1278         /* Get prefix */
1279         if (Client_Type(Client) == CLIENT_SERVER)
1280                 prefix = Client_Search(Req->prefix);
1281         else
1282                 prefix = Client;
1283
1284         if (!prefix)
1285                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1286                                                 Client_ID(Client), Req->prefix);
1287
1288         /* Forward to other server? */
1289         if (target != Client_ThisServer()) {
1290                 if (!target || (Client_Type(target) != CLIENT_SERVER))
1291                         return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
1292                                         Client_ID(prefix), Req->argv[2]);
1293
1294                 /* Forward */
1295                 IRC_WriteStrClientPrefix( target, prefix, "WHOWAS %s %s %s",
1296                                           Req->argv[0], Req->argv[1],
1297                                           Req->argv[2] );
1298                 return CONNECTED;
1299         }
1300
1301         whowas = Client_GetWhowas( );
1302         last = Client_GetLastWhowasIndex( );
1303         if (last < 0)
1304                 last = 0;
1305
1306         max = DEFAULT_WHOWAS;
1307         if (Req->argc > 1) {
1308                 max = atoi(Req->argv[1]);
1309                 if (max < 1)
1310                         max = MAX_WHOWAS;
1311         }
1312
1313         /*
1314          * Break up the nick argument into a list of nicks, if applicable
1315          * Can't modify Req->argv[0] because we need it for RPL_ENDOFWHOWAS_MSG.
1316          */
1317         strlcpy(tok_buf, Req->argv[0], sizeof(tok_buf));
1318         nick = strtok(tok_buf, ",");
1319
1320         for (i=last, count=0; nick != NULL ; nick = strtok(NULL, ",")) {
1321                 nc = 0;
1322                 do {
1323                         /* Used entry? */
1324                         if (whowas[i].time > 0 && strcasecmp(nick, whowas[i].id) == 0) {
1325                                 if (!WHOWAS_EntryWrite(prefix, &whowas[i]))
1326                                         return DISCONNECTED;
1327                                 nc++;
1328                                 count++;
1329                         }
1330                         /* previous entry */
1331                         i--;
1332
1333                         /* "underflow", wrap around */
1334                         if (i < 0)
1335                                 i = MAX_WHOWAS - 1;
1336
1337                         if (nc && count >= max)
1338                                 break;
1339                 } while (i != last);
1340
1341                 if (nc == 0 && !IRC_WriteStrClient(prefix, ERR_WASNOSUCHNICK_MSG,
1342                                                 Client_ID(prefix), nick))
1343                         return DISCONNECTED;
1344         }
1345         return IRC_WriteStrClient(prefix, RPL_ENDOFWHOWAS_MSG, Client_ID(prefix), Req->argv[0]);
1346 } /* IRC_WHOWAS */
1347
1348
1349 /**
1350  * Send LUSERS reply to a client.
1351  *
1352  * @param Client The receipient of the information.
1353  * @return CONNECTED or DISCONNECTED.
1354  */
1355 GLOBAL bool
1356 IRC_Send_LUSERS(CLIENT *Client)
1357 {
1358         unsigned long cnt;
1359 #ifndef STRICT_RFC
1360         unsigned long max;
1361 #endif
1362
1363         assert(Client != NULL);
1364
1365         /* Users, services and serevers in the network */
1366         if (!IRC_WriteStrClient(Client, RPL_LUSERCLIENT_MSG, Client_ID(Client),
1367                                 Client_UserCount(), Client_ServiceCount(),
1368                                 Client_ServerCount()))
1369                 return DISCONNECTED;
1370
1371         /* Number of IRC operators */
1372         cnt = Client_OperCount( );
1373         if (cnt > 0) {
1374                 if (!IRC_WriteStrClient(Client, RPL_LUSEROP_MSG,
1375                                         Client_ID(Client), cnt))
1376                         return DISCONNECTED;
1377         }
1378
1379         /* Unknown connections */
1380         cnt = Client_UnknownCount( );
1381         if (cnt > 0) {
1382                 if (!IRC_WriteStrClient(Client, RPL_LUSERUNKNOWN_MSG,
1383                                         Client_ID(Client), cnt))
1384                         return DISCONNECTED;
1385         }
1386
1387         /* Number of created channels */
1388         if (!IRC_WriteStrClient(Client, RPL_LUSERCHANNELS_MSG,
1389                                 Client_ID(Client),
1390                                 Channel_CountVisible(Client)))
1391                 return DISCONNECTED;
1392
1393         /* Number of local users, services and servers */
1394         if (!IRC_WriteStrClient(Client, RPL_LUSERME_MSG, Client_ID(Client),
1395                                 Client_MyUserCount(), Client_MyServiceCount(),
1396                                 Client_MyServerCount()))
1397                 return DISCONNECTED;
1398
1399 #ifndef STRICT_RFC
1400         /* Maximum number of local users */
1401         cnt = Client_MyUserCount();
1402         max = Client_MyMaxUserCount();
1403         if (! IRC_WriteStrClient(Client, RPL_LOCALUSERS_MSG, Client_ID(Client),
1404                         cnt, max, cnt, max))
1405                 return DISCONNECTED;
1406         /* Maximum number of users in the network */
1407         cnt = Client_UserCount();
1408         max = Client_MaxUserCount();
1409         if(! IRC_WriteStrClient(Client, RPL_NETUSERS_MSG, Client_ID(Client),
1410                         cnt, max, cnt, max))
1411                 return DISCONNECTED;
1412         /* Connection counters */
1413         if (! IRC_WriteStrClient(Client, RPL_STATSCONN_MSG, Client_ID(Client),
1414                         Conn_CountMax(), Conn_CountAccepted()))
1415                 return DISCONNECTED;
1416 #endif
1417
1418         return CONNECTED;
1419 } /* IRC_Send_LUSERS */
1420
1421
1422 static bool
1423 Show_MOTD_Start(CLIENT *Client)
1424 {
1425         return IRC_WriteStrClient(Client, RPL_MOTDSTART_MSG,
1426                 Client_ID( Client ), Client_ID( Client_ThisServer( )));
1427 }
1428
1429 static bool
1430 Show_MOTD_Sendline(CLIENT *Client, const char *msg)
1431 {
1432         return IRC_WriteStrClient(Client, RPL_MOTD_MSG, Client_ID( Client ), msg);
1433 }
1434
1435 static bool
1436 Show_MOTD_End(CLIENT *Client)
1437 {
1438         return IRC_WriteStrClient( Client, RPL_ENDOFMOTD_MSG, Client_ID( Client ));
1439 }
1440
1441 #ifdef SSL_SUPPORT
1442 static bool Show_MOTD_SSLInfo(CLIENT *Client)
1443 {
1444         bool ret = true;
1445         char buf[COMMAND_LEN] = "Connected using Cipher ";
1446
1447         if (!Conn_GetCipherInfo(Client_Conn(Client), buf + 23, sizeof buf - 23))
1448                 return true;
1449
1450         if (!Show_MOTD_Sendline(Client, buf))
1451                 ret = false;
1452
1453         return ret;
1454 }
1455 #else
1456 static inline bool
1457 Show_MOTD_SSLInfo(UNUSED CLIENT *c)
1458 { return true; }
1459 #endif
1460
1461 GLOBAL bool
1462 IRC_Show_MOTD( CLIENT *Client )
1463 {
1464         const char *line;
1465         size_t len_tot, len_str;
1466
1467         assert( Client != NULL );
1468
1469         len_tot = array_bytes(&Conf_Motd);
1470         if (len_tot == 0 && !Conn_UsesSSL(Client_Conn(Client)))
1471                 return IRC_WriteStrClient(Client, ERR_NOMOTD_MSG, Client_ID(Client));
1472
1473         if (!Show_MOTD_Start(Client))
1474                 return DISCONNECTED;
1475
1476         line = array_start(&Conf_Motd);
1477         while (len_tot > 0) {
1478                 len_str = strlen(line) + 1;
1479
1480                 assert(len_tot >= len_str);
1481                 len_tot -= len_str;
1482
1483                 if (!Show_MOTD_Sendline(Client, line))
1484                         return DISCONNECTED;
1485                 line += len_str;
1486         }
1487
1488         if (!Show_MOTD_SSLInfo(Client))
1489                 return DISCONNECTED;
1490         return Show_MOTD_End(Client);
1491 } /* IRC_Show_MOTD */
1492
1493
1494 GLOBAL bool
1495 IRC_Send_NAMES( CLIENT *Client, CHANNEL *Chan )
1496 {
1497         bool is_visible, is_member;
1498         char str[LINE_LEN + 1];
1499         CL2CHAN *cl2chan;
1500         CLIENT *cl;
1501
1502         assert( Client != NULL );
1503         assert( Chan != NULL );
1504
1505         if( Channel_IsMemberOf( Chan, Client )) is_member = true;
1506         else is_member = false;
1507
1508         /* Do not print info on channel memberships to anyone that is not member? */
1509         if (Conf_MorePrivacy && !is_member)
1510                 return CONNECTED;
1511
1512         /* Secret channel? */
1513         if( ! is_member && strchr( Channel_Modes( Chan ), 's' )) return CONNECTED;
1514
1515         /* Alle Mitglieder suchen */
1516         snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1517         cl2chan = Channel_FirstMember( Chan );
1518         while( cl2chan )
1519         {
1520                 cl = Channel_GetClient( cl2chan );
1521
1522                 if( strchr( Client_Modes( cl ), 'i' )) is_visible = false;
1523                 else is_visible = true;
1524
1525                 if( is_member || is_visible )
1526                 {
1527                         /* Nick anhaengen */
1528                         if( str[strlen( str ) - 1] != ':' ) strlcat( str, " ", sizeof( str ));
1529                         if( strchr( Channel_UserModes( Chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
1530                         else if( strchr( Channel_UserModes( Chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
1531                         strlcat( str, Client_ID( cl ), sizeof( str ));
1532
1533                         if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
1534                         {
1535                                 /* Zeile wird zu lang: senden! */
1536                                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1537                                 snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1538                         }
1539                 }
1540
1541                 /* naechstes Mitglied suchen */
1542                 cl2chan = Channel_NextMember( Chan, cl2chan );
1543         }
1544         if( str[strlen( str ) - 1] != ':')
1545         {
1546                 /* Es sind noch Daten da, die gesendet werden muessen */
1547                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1548         }
1549
1550         return CONNECTED;
1551 } /* IRC_Send_NAMES */
1552
1553
1554 /**
1555  * Send the ISUPPORT numeric (005).
1556  * This numeric indicates the features that are supported by this server.
1557  * See <http://www.irc.org/tech_docs/005.html> for details.
1558  */
1559 GLOBAL bool
1560 IRC_Send_ISUPPORT(CLIENT * Client)
1561 {
1562         if (!IRC_WriteStrClient(Client, RPL_ISUPPORT1_MSG, Client_ID(Client),
1563                                 Conf_MaxJoins))
1564                 return DISCONNECTED;
1565         return IRC_WriteStrClient(Client, RPL_ISUPPORT2_MSG, Client_ID(Client),
1566                                   CHANNEL_NAME_LEN - 1, Conf_MaxNickLength - 1,
1567                                   COMMAND_LEN - 23, CLIENT_AWAY_LEN - 1,
1568                                   COMMAND_LEN - 113);
1569 } /* IRC_Send_ISUPPORT */
1570
1571
1572 /* -eof- */