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                     && MatchCaseInsensitive(mask, Client_ID(c))) {
 259                         if (!IRC_WriteStrClient(from, RPL_LINKS_MSG,
 260                                         Client_ID(from), Client_ID(c),
 261                                         Client_ID(Client_TopServer(c)
 262                                                   ? Client_TopServer(c)
 263                                                   : Client_ThisServer()),
 264                                         Client_Hops(c), Client_Info(c)))
 265                                 return DISCONNECTED;
 266                 }
 267                 c = Client_Next(c);
 268         }
 269         return IRC_WriteStrClient(from, RPL_ENDOFLINKS_MSG,
 270                                   Client_ID(from), mask);
 271 } /* IRC_LINKS */
 272
 273
 274 GLOBAL bool
 275 IRC_LUSERS( CLIENT *Client, REQUEST *Req )
 276 {
 277         CLIENT *target, *from;
 278
 279         assert( Client != NULL );
 280         assert( Req != NULL );
 281
 282         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 283
 284         /* Absender ermitteln */
 285         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 286         else from = Client;
 287         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 288
 289         /* An anderen Server forwarden? */
 290         if( Req->argc == 2 )
 291         {
 292                 target = Client_Search( Req->argv[1] );
 293                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 294                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LUSERS %s %s", Req->argv[0], Req->argv[1] );
 295         }
 296
 297         /* Wer ist der Absender? */
 298         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 299         else target = Client;
 300         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 301
 302         IRC_Send_LUSERS( target );
 303
 304         IRC_SetPenalty( target, 1 );
 305         return CONNECTED;
 306 } /* IRC_LUSERS */
 307
 308
 309 /**
 310  * Handler for the IRC command "SERVLIST".
 311  * List registered services, see RFC 2811, section 3.5.1: the syntax is
 312  * "SERVLIST [<mask> [<type>]]".
 313  */
 314 GLOBAL bool
 315 IRC_SERVLIST(CLIENT *Client, REQUEST *Req)
 316 {
 317         CLIENT *c;
 318
 319         assert(Client != NULL);
 320         assert(Req != NULL);
 321
 322         if (Req->argc > 2)
 323                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 324                                           Client_ID(Client), Req->command);
 325
 326         if (Req->argc < 2 || strcmp(Req->argv[1], "0") == 0) {
 327                 for (c = Client_First(); c!= NULL; c = Client_Next(c)) {
 328                         if (Client_Type(c) != CLIENT_SERVICE)
 329                                 continue;
 330                         if (Req->argc > 0 && !MatchCaseInsensitive(Req->argv[0],
 331                                                                   Client_ID(c)))
 332                                 continue;
 333                         if (!IRC_WriteStrClient(Client, RPL_SERVLIST_MSG,
 334                                         Client_ID(Client), Client_Mask(c),
 335                                         Client_Mask(Client_Introducer(c)), "*",
 336                                         0, Client_Hops(c), Client_Info(c)))
 337                                 return DISCONNECTED;
 338                 }
 339         }
 340
 341         return IRC_WriteStrClient(Client, RPL_SERVLISTEND_MSG, Client_ID(Client),
 342                                   Req->argc > 0 ? Req->argv[0] : "*",
 343                                   Req->argc > 1 ? Req->argv[1] : "0");
 344 } /* IRC_SERVLIST */
 345
 346
 347 GLOBAL bool
 348 IRC_MOTD( CLIENT *Client, REQUEST *Req )
 349 {
 350         CLIENT *from, *target;
 351
 352         assert( Client != NULL );
 353         assert( Req != NULL );
 354
 355         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 356
 357         /* From aus Prefix ermitteln */
 358         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 359         else from = Client;
 360         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 361
 362         if( Req->argc == 1 )
 363         {
 364                 /* forward? */
 365                 target = Client_Search( Req->argv[0] );
 366                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 367
 368                 if( target != Client_ThisServer( ))
 369                 {
 370                         /* Ok, anderer Server ist das Ziel: forwarden */
 371                         return IRC_WriteStrClientPrefix( target, from, "MOTD %s", Req->argv[0] );
 372                 }
 373         }
 374
 375         IRC_SetPenalty( from, 3 );
 376         return IRC_Show_MOTD( from );
 377 } /* IRC_MOTD */
 378
 379
 380 GLOBAL bool
 381 IRC_NAMES( CLIENT *Client, REQUEST *Req )
 382 {
 383         char rpl[COMMAND_LEN], *ptr;
 384         CLIENT *target, *from, *c;
 385         CHANNEL *chan;
 386
 387         assert( Client != NULL );
 388         assert( Req != NULL );
 389
 390         if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 391
 392         /* use prefix to determine "From" */
 393         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 394         else from = Client;
 395         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 396
 397         if( Req->argc == 2 )
 398         {
 399                 /* forward to another server? */
 400                 target = Client_Search( Req->argv[1] );
 401                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 402
 403                 if( target != Client_ThisServer( )) {
 404                         /* target is another server, forward */
 405                         return IRC_WriteStrClientPrefix( target, from, "NAMES %s :%s", Req->argv[0], Req->argv[1] );
 406                 }
 407         }
 408
 409         if( Req->argc > 0 )
 410         {
 411                 /* bestimmte Channels durchgehen */
 412                 ptr = strtok( Req->argv[0], "," );
 413                 while( ptr )
 414                 {
 415                         chan = Channel_Search( ptr );
 416                         if( chan )
 417                         {
 418                                 /* print name */
 419                                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 420                         }
 421                         if( ! IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), ptr )) return DISCONNECTED;
 422
 423                         /* get next channel name */
 424                         ptr = strtok( NULL, "," );
 425                 }
 426                 return CONNECTED;
 427         }
 428
 429         chan = Channel_First( );
 430         while( chan )
 431         {
 432                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 433
 434                 chan = Channel_Next( chan );
 435         }
 436
 437         /* Now print all clients which are not in any channel */
 438         c = Client_First( );
 439         snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 440         while( c )
 441         {
 442                 if(( Client_Type( c ) == CLIENT_USER ) && ( Channel_FirstChannelOf( c ) == NULL ) && ( ! strchr( Client_Modes( c ), 'i' )))
 443                 {
 444                         /* its a user, concatenate ... */
 445                         if( rpl[strlen( rpl ) - 1] != ':' ) strlcat( rpl, " ", sizeof( rpl ));
 446                         strlcat( rpl, Client_ID( c ), sizeof( rpl ));
 447
 448                         if( strlen( rpl ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
 449                         {
 450                                 /* Line is gwoing too long, send now */
 451                                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 452                                 snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 453                         }
 454                 }
 455
 456                 c = Client_Next( c );
 457         }
 458         if( rpl[strlen( rpl ) - 1] != ':')
 459         {
 460                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 461         }
 462
 463         IRC_SetPenalty( from, 1 );
 464         return IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), "*" );
 465 } /* IRC_NAMES */
 466
 467
 468 static unsigned int
 469 t_diff(time_t *t, const time_t d)
 470 {
 471         time_t diff, remain;
 472
 473         diff = *t / d;
 474         remain = diff * d;
 475         *t -= remain;
 476
 477         return (unsigned int)diff;
 478 }
 479
 480
 481 static unsigned int
 482 uptime_days(time_t *now)
 483 {
 484         return t_diff(now, 60 * 60 * 24);
 485 }
 486
 487
 488 static unsigned int
 489 uptime_hrs(time_t *now)
 490 {
 491         return t_diff(now, 60 * 60);
 492 }
 493
 494
 495 static unsigned int
 496 uptime_mins(time_t *now)
 497 {
 498          return t_diff(now, 60);
 499 }
 500
 501
 502 /**
 503  * Handler for the IRC command "STATS".
 504  * See RFC 2812 section 3.4.4.
 505  */
 506 GLOBAL bool
 507 IRC_STATS( CLIENT *Client, REQUEST *Req )
 508 {
 509         CLIENT *from, *target, *cl;
 510         CONN_ID con;
 511         char query;
 512         COMMAND *cmd;
 513         time_t time_now;
 514         unsigned int days, hrs, mins;
 515         struct list_head *list;
 516         struct list_elem *list_item;
 517
 518         assert(Client != NULL);
 519         assert(Req != NULL);
 520
 521         if (Req->argc > 2)
 522                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 523                                           Client_ID(Client), Req->command);
 524
 525         /* use prefix to determine "From" */
 526         if (Client_Type(Client) == CLIENT_SERVER)
 527                 from = Client_Search(Req->prefix);
 528         else
 529                 from = Client;
 530
 531         if (!from)
 532                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 533                                           Client_ID(Client), Req->prefix);
 534
 535         if (Req->argc == 2) {
 536                 /* forward to another server? */
 537                 target = Client_Search(Req->argv[1]);
 538                 if ((!target) || (Client_Type(target) != CLIENT_SERVER))
 539                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 540                                                  Client_ID(from), Req->argv[1]);
 541
 542                 if (target != Client_ThisServer()) {
 543                         /* forward to another server */
 544                         return IRC_WriteStrClientPrefix(target, from,
 545                                      "STATS %s %s", Req->argv[0], Req->argv[1]);
 546                 }
 547         }
 548
 549         if (Req->argc > 0)
 550                 query = Req->argv[0][0] ? Req->argv[0][0] : '*';
 551         else
 552                 query = '*';
 553
 554         switch (query) {
 555         case 'g':       /* Network-wide bans ("G-Lines") */
 556         case 'G':
 557         case 'k':       /* Server-local bans ("K-Lines") */
 558         case 'K':
 559                 if (!Client_HasMode(from, 'o'))
 560                     return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
 561                                               Client_ID(from));
 562                 if (query == 'g' || query == 'G')
 563                         list = Class_GetList(CLASS_GLINE);
 564                 else
 565                         list = Class_GetList(CLASS_KLINE);
 566                         list_item = Lists_GetFirst(list);
 567                         while (list_item) {
 568                                 if (!IRC_WriteStrClient(from, RPL_STATSXLINE_MSG,
 569                                                 Client_ID(from), query,
 570                                                 Lists_GetMask(list_item),
 571                                                 Lists_GetValidity(list_item),
 572                                                 Lists_GetReason(list_item)))
 573                                         return DISCONNECTED;
 574                                 list_item = Lists_GetNext(list_item);
 575                         }
 576                 break;
 577         case 'l':       /* Link status (servers and own link) */
 578         case 'L':
 579                 time_now = time(NULL);
 580                 for (con = Conn_First(); con != NONE; con = Conn_Next(con)) {
 581                         cl = Conn_GetClient(con);
 582                         if (!cl)
 583                                 continue;
 584                         if ((Client_Type(cl) == CLIENT_SERVER)
 585                             || (cl == Client)) {
 586                                 /* Server link or our own connection */
 587 #ifdef ZLIB
 588                                 if (Conn_Options(con) & CONN_ZIP) {
 589                                         if (!IRC_WriteStrClient
 590                                             (from, RPL_STATSLINKINFOZIP_MSG,
 591                                              Client_ID(from), Client_Mask(cl),
 592                                              Conn_SendQ(con), Conn_SendMsg(con),
 593                                              Zip_SendBytes(con),
 594                                              Conn_SendBytes(con),
 595                                              Conn_RecvMsg(con),
 596                                              Zip_RecvBytes(con),
 597                                              Conn_RecvBytes(con),
 598                                              (long)(time_now - Conn_StartTime(con))))
 599                                                 return DISCONNECTED;
 600                                         continue;
 601                                 }
 602 #endif
 603                                 if (!IRC_WriteStrClient
 604                                     (from, RPL_STATSLINKINFO_MSG,
 605                                      Client_ID(from), Client_Mask(cl),
 606                                      Conn_SendQ(con), Conn_SendMsg(con),
 607                                      Conn_SendBytes(con), Conn_RecvMsg(con),
 608                                      Conn_RecvBytes(con),
 609                                      (long)(time_now - Conn_StartTime(con))))
 610                                         return DISCONNECTED;
 611                         }
 612                 }
 613                 break;
 614         case 'm':       /* IRC command status (usage count) */
 615         case 'M':
 616                 cmd = Parse_GetCommandStruct();
 617                 for (; cmd->name; cmd++) {
 618                         if (cmd->lcount == 0 && cmd->rcount == 0)
 619                                 continue;
 620                         if (!IRC_WriteStrClient
 621                             (from, RPL_STATSCOMMANDS_MSG, Client_ID(from),
 622                              cmd->name, cmd->lcount, cmd->bytes, cmd->rcount))
 623                                 return DISCONNECTED;
 624                 }
 625                 break;
 626         case 'u':       /* Server uptime */
 627         case 'U':
 628                 time_now = time(NULL) - NGIRCd_Start;
 629                 days = uptime_days(&time_now);
 630                 hrs = uptime_hrs(&time_now);
 631                 mins = uptime_mins(&time_now);
 632                 if (!IRC_WriteStrClient(from, RPL_STATSUPTIME, Client_ID(from),
 633                                        days, hrs, mins, (unsigned int)time_now))
 634                         return DISCONNECTED;
 635                 break;
 636         }
 637
 638         IRC_SetPenalty(from, 2);
 639         return IRC_WriteStrClient(from, RPL_ENDOFSTATS_MSG,
 640                                   Client_ID(from), query);
 641 } /* IRC_STATS */
 642
 643
 644 /**
 645  * Handler for the IRC command "SUMMON".
 646  * See RFC 2812 section 4.5. ngIRCd doesn't implement this functionality and
 647  * therefore answers with ERR_SUMMONDISABLED.
 648  */
 649 GLOBAL bool
 650 IRC_SUMMON(CLIENT * Client, REQUEST * Req)
 651 {
 652         return IRC_WriteStrClient(Client, ERR_SUMMONDISABLED_MSG,
 653                                   Client_ID(Client), Req->command);
 654 } /* IRC_SUMMON */
 655
 656
 657 GLOBAL bool
 658 IRC_TIME( CLIENT *Client, REQUEST *Req )
 659 {
 660         CLIENT *from, *target;
 661         char t_str[64];
 662         time_t t;
 663
 664         assert( Client != NULL );
 665         assert( Req != NULL );
 666
 667         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 668
 669         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 670         else from = Client;
 671         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 672
 673         if( Req->argc == 1 )
 674         {
 675                 target = Client_Search( Req->argv[0] );
 676                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[0] );
 677
 678                 if( target != Client_ThisServer( ))
 679                 {
 680                         return IRC_WriteStrClientPrefix( target, from, "TIME %s", Req->argv[0] );
 681                 }
 682         }
 683
 684         t = time( NULL );
 685         (void)strftime( t_str, 60, "%A %B %d %Y -- %H:%M %Z", localtime( &t ));
 686         return IRC_WriteStrClient( from, RPL_TIME_MSG, Client_ID( from ), Client_ID( Client_ThisServer( )), t_str );
 687 } /* IRC_TIME */
 688
 689
 690 /**
 691  * Handler for the IRC command "USERHOST".
 692  * See RFC 2812 section 4.8.
 693  */
 694 GLOBAL bool
 695 IRC_USERHOST(CLIENT *Client, REQUEST *Req)
 696 {
 697         char rpl[COMMAND_LEN];
 698         CLIENT *c;
 699         int max, i;
 700
 701         assert(Client != NULL);
 702         assert(Req != NULL);
 703
 704         if ((Req->argc < 1))
 705                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 706                                           Client_ID(Client), Req->command);
 707
 708         if (Req->argc > 5)
 709                 max = 5;
 710         else
 711                 max = Req->argc;
 712
 713         strlcpy(rpl, RPL_USERHOST_MSG, sizeof rpl);
 714         for (i = 0; i < max; i++) {
 715                 c = Client_Search(Req->argv[i]);
 716                 if (c && (Client_Type(c) == CLIENT_USER)) {
 717                         /* This Nick is "online" */
 718                         strlcat(rpl, Client_ID(c), sizeof(rpl));
 719                         if (Client_HasMode(c, 'o'))
 720                                 strlcat(rpl, "*", sizeof(rpl));
 721                         strlcat(rpl, "=", sizeof(rpl));
 722                         if (Client_HasMode(c, 'a'))
 723                                 strlcat(rpl, "-", sizeof(rpl));
 724                         else
 725                                 strlcat(rpl, "+", sizeof(rpl));
 726                         strlcat(rpl, Client_User(c), sizeof(rpl));
 727                         strlcat(rpl, "@", sizeof(rpl));
 728                         strlcat(rpl, Client_HostnameCloaked(c), sizeof(rpl));
 729                         strlcat(rpl, " ", sizeof(rpl));
 730                 }
 731         }
 732         ngt_TrimLastChr(rpl, ' ');
 733
 734         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 735 } /* IRC_USERHOST */
 736
 737
 738 /**
 739  * Handler for the IRC command "USERS".
 740  * See RFC 2812 section 4.6. As suggested there the command is disabled.
 741  */
 742 GLOBAL bool
 743 IRC_USERS(CLIENT * Client, REQUEST * Req)
 744 {
 745         return IRC_WriteStrClient(Client, ERR_USERSDISABLED_MSG,
 746                                   Client_ID(Client), Req->command);
 747 } /* IRC_USERS */
 748
 749
 750 GLOBAL bool
 751 IRC_VERSION( CLIENT *Client, REQUEST *Req )
 752 {
 753         CLIENT *target, *prefix;
 754
 755         assert( Client != NULL );
 756         assert( Req != NULL );
 757
 758         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 759
 760         /* Ziel suchen */
 761         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
 762         else target = Client_ThisServer( );
 763
 764         /* Prefix ermitteln */
 765         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
 766         else prefix = Client;
 767         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 768
 769         /* An anderen Server weiterleiten? */
 770         if( target != Client_ThisServer( ))
 771         {
 772                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
 773
 774                 /* forwarden */
 775                 IRC_WriteStrClientPrefix( target, prefix, "VERSION %s", Req->argv[0] );
 776                 return CONNECTED;
 777         }
 778
 779         /* send version information */
 780         IRC_SetPenalty(Client, 1);
 781         return IRC_WriteStrClient(Client, RPL_VERSION_MSG, Client_ID(prefix),
 782                                   PACKAGE_NAME, PACKAGE_VERSION,
 783                                   NGIRCd_DebugLevel, Conf_ServerName,
 784                                   NGIRCd_VersionAddition);
 785 } /* IRC_VERSION */
 786
 787
 788 static bool
 789 write_whoreply(CLIENT *Client, CLIENT *c, const char *channelname, const char *flags)
 790 {
 791         return IRC_WriteStrClient(Client, RPL_WHOREPLY_MSG, Client_ID(Client),
 792                                   channelname, Client_User(c),
 793                                   Client_HostnameCloaked(c),
 794                                   Client_ID(Client_Introducer(c)), Client_ID(c),
 795                                   flags, Client_Hops(c), Client_Info(c));
 796 }
 797
 798
 799 static const char *
 800 who_flags_status(const char *client_modes)
 801 {
 802         if (strchr(client_modes, 'a'))
 803                 return "G"; /* away */
 804         return "H";
 805 }
 806
 807
 808 static const char *
 809 who_flags_qualifier(const char *chan_user_modes)
 810 {
 811         if (strchr(chan_user_modes, 'o'))
 812                 return "@";
 813         else if (strchr(chan_user_modes, 'v'))
 814                 return "+";
 815         return "";
 816 }
 817
 818
 819 /**
 820  * Send WHO reply for a "channel target" ("WHO #channel").
 821  *
 822  * @param Client Client requesting the information.
 823  * @param Chan Channel being requested.
 824  * @param OnlyOps Only display IRC operators.
 825  * @return CONNECTED or DISCONNECTED.
 826  */
 827 static bool
 828 IRC_WHO_Channel(CLIENT *Client, CHANNEL *Chan, bool OnlyOps)
 829 {
 830         bool is_visible, is_member, is_ircop;
 831         CL2CHAN *cl2chan;
 832         const char *client_modes;
 833         const char *chan_user_modes;
 834         char flags[8];
 835         CLIENT *c;
 836
 837         assert( Client != NULL );
 838         assert( Chan != NULL );
 839
 840         is_member = Channel_IsMemberOf(Chan, Client);
 841
 842         /* Secret channel? */
 843         if (!is_member && strchr(Channel_Modes(Chan), 's'))
 844                 return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG,
 845                                           Client_ID(Client), Channel_Name(Chan));
 846
 847         cl2chan = Channel_FirstMember(Chan);
 848         for (; cl2chan ; cl2chan = Channel_NextMember(Chan, cl2chan)) {
 849                 c = Channel_GetClient(cl2chan);
 850
 851                 client_modes = Client_Modes(c);
 852                 is_ircop = strchr(client_modes, 'o') != NULL;
 853                 if (OnlyOps && !is_ircop)
 854                         continue;
 855
 856                 is_visible = strchr(client_modes, 'i') == NULL;
 857                 if (is_member || is_visible) {
 858                         strcpy(flags, who_flags_status(client_modes));
 859                         if (is_ircop)
 860                                 strlcat(flags, "*", sizeof(flags));
 861
 862                         chan_user_modes = Channel_UserModes(Chan, c);
 863                         strlcat(flags, who_flags_qualifier(chan_user_modes),
 864                                 sizeof(flags));
 865
 866                         if (!write_whoreply(Client, c, Channel_Name(Chan),
 867                                             flags))
 868                                 return DISCONNECTED;
 869                 }
 870         }
 871         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 872                                   Channel_Name(Chan));
 873 }
 874
 875
 876 /**
 877  * Send WHO reply for a "mask target" ("WHO m*sk").
 878  *
 879  * @param Client Client requesting the information.
 880  * @param Mask Mask being requested or NULL for "all" clients.
 881  * @param OnlyOps Only display IRC operators.
 882  * @return CONNECTED or DISCONNECTED.
 883  */
 884 static bool
 885 IRC_WHO_Mask(CLIENT *Client, char *Mask, bool OnlyOps)
 886 {
 887         CLIENT *c;
 888         CL2CHAN *cl2chan;
 889         CHANNEL *chan;
 890         bool client_match, is_visible;
 891         char flags[4];
 892
 893         assert (Client != NULL);
 894
 895         if (Mask)
 896                 ngt_LowerStr(Mask);
 897
 898         for (c = Client_First(); c != NULL; c = Client_Next(c)) {
 899                 if (Client_Type(c) != CLIENT_USER)
 900                         continue;
 901
 902                 if (OnlyOps && !Client_HasMode(c, 'o'))
 903                         continue;
 904
 905                 if (Mask) {
 906                         /* Match pattern against user host/server/name/nick */
 907                         client_match = MatchCaseInsensitive(Mask,
 908                                                 Client_Hostname(c));
 909                         if (!client_match)
 910                                 client_match = MatchCaseInsensitive(Mask,
 911                                                 Client_ID(Client_Introducer(c)));
 912                         if (!client_match)
 913                                 client_match = MatchCaseInsensitive(Mask,
 914                                                 Client_Info(c));
 915                         if (!client_match)
 916                                 client_match = MatchCaseInsensitive(Mask,
 917                                                 Client_ID(c));
 918                         if (!client_match)
 919                                 continue;       /* no match: skip this client */
 920                 }
 921
 922                 is_visible = !Client_HasMode(c, 'i');
 923
 924                 /* Target client is invisible, but mask matches exactly? */
 925                 if (!is_visible && Mask && strcasecmp(Client_ID(c), Mask) == 0)
 926                         is_visible = true;
 927
 928                 /* Target still invisible, but are both on the same channel? */
 929                 if (!is_visible) {
 930                         cl2chan = Channel_FirstChannelOf(Client);
 931                         while (cl2chan && !is_visible) {
 932                                 chan = Channel_GetChannel(cl2chan);
 933                                 if (Channel_IsMemberOf(chan, c))
 934                                         is_visible = true;
 935                                 cl2chan = Channel_NextChannelOf(Client, cl2chan);
 936                         }
 937                 }
 938
 939                 if (!is_visible)        /* target user is not visible */
 940                         continue;
 941
 942                 strcpy(flags, who_flags_status(Client_Modes(c)));
 943                 if (strchr(Client_Modes(c), 'o'))
 944                         strlcat(flags, "*", sizeof(flags));
 945
 946                 if (!write_whoreply(Client, c, "*", flags))
 947                         return DISCONNECTED;
 948
 949         }
 950
 951         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 952                                   Mask ? Mask : "*");
 953 }
 954
 955
 956 /**
 957  * Handler for the IRC "WHO" command.
 958  *
 959  * See RFC 2812, 3.6.1 "Who query".
 960  *
 961  * @param Client The client from which this command has been received.
 962  * @param Req Request structure with prefix and all parameters.
 963  * @return CONNECTED or DISCONNECTED.
 964  */
 965 GLOBAL bool
 966 IRC_WHO(CLIENT *Client, REQUEST *Req)
 967 {
 968         bool only_ops;
 969         CHANNEL *chan;
 970
 971         assert (Client != NULL);
 972         assert (Req != NULL);
 973
 974         if (Req->argc > 2)
 975                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 976                                           Client_ID(Client), Req->command);
 977
 978         only_ops = false;
 979
 980         if (Req->argc == 2) {
 981                 if (strcmp(Req->argv[1], "o") == 0)
 982                         only_ops = true;
 983 #ifdef STRICT_RFC
 984                 else
 985                         return IRC_WriteStrClient(Client,
 986                                                   ERR_NEEDMOREPARAMS_MSG,
 987                                                   Client_ID(Client),
 988                                                   Req->command);
 989 #endif
 990         }
 991
 992         IRC_SetPenalty(Client, 1);
 993         if (Req->argc >= 1) {
 994                 /* Channel or mask given */
 995                 chan = Channel_Search(Req->argv[0]);
 996                 if (chan) {
 997                         /* Members of a channel have been requested */
 998                         IRC_SetPenalty(Client, 1);
 999                         return IRC_WHO_Channel(Client, chan, only_ops);
1000                 }
1001                 if (strcmp(Req->argv[0], "0") != 0) {
1002                         /* A mask has been given. But please note this RFC
1003                          * stupidity: "0" is same as no arguments ... */
1004                         IRC_SetPenalty(Client, 3);
1005                         return IRC_WHO_Mask(Client, Req->argv[0], only_ops);
1006                 }
1007         }
1008
1009         /* No channel or (valid) mask given */
1010         IRC_SetPenalty(Client, 2);
1011         return IRC_WHO_Mask(Client, NULL, only_ops);
1012 } /* IRC_WHO */
1013
1014
1015 /**
1016  * Generate WHOIS reply of one actual client.
1017  *
1018  * @param Client        The client from which this command has been received.
1019  * @param from          The client requesting the information ("originator").
1020  * @param c             The client of which information should be returned.
1021  * @returns             CONNECTED or DISCONNECTED.
1022  */
1023 static bool
1024 IRC_WHOIS_SendReply(CLIENT *Client, CLIENT *from, CLIENT *c)
1025 {
1026         char str[LINE_LEN + 1];
1027         CL2CHAN *cl2chan;
1028         CHANNEL *chan;
1029
1030         /* Nick, user, hostname and client info */
1031         if (!IRC_WriteStrClient(from, RPL_WHOISUSER_MSG, Client_ID(from),
1032                                 Client_ID(c), Client_User(c),
1033                                 Client_HostnameCloaked(c), Client_Info(c)))
1034                 return DISCONNECTED;
1035
1036         /* Server */
1037         if (!IRC_WriteStrClient(from, RPL_WHOISSERVER_MSG, Client_ID(from),
1038                                 Client_ID(c), Client_ID(Client_Introducer(c)),
1039                                 Client_Info(Client_Introducer(c))))
1040                 return DISCONNECTED;
1041
1042         /* Channels */
1043         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1044                  Client_ID(from), Client_ID(c));
1045         cl2chan = Channel_FirstChannelOf(c);
1046         while (cl2chan) {
1047                 chan = Channel_GetChannel(cl2chan);
1048                 assert(chan != NULL);
1049
1050                 /* next */
1051                 cl2chan = Channel_NextChannelOf(c, cl2chan);
1052
1053                 /* Secret channel? */
1054                 if (strchr(Channel_Modes(chan), 's')
1055                     && !Channel_IsMemberOf(chan, Client))
1056                         continue;
1057
1058                 /* Local channel and request is not from a user? */
1059                 if (Client_Type(Client) == CLIENT_SERVER
1060                     && Channel_IsLocal(chan))
1061                         continue;
1062
1063                 /* Concatenate channel names */
1064                 if (str[strlen(str) - 1] != ':')
1065                         strlcat(str, " ", sizeof(str));
1066
1067                 strlcat(str, who_flags_qualifier(Channel_UserModes(chan, c)),
1068                                                  sizeof(str));
1069                 strlcat(str, Channel_Name(chan), sizeof(str));
1070
1071                 if (strlen(str) > (LINE_LEN - CHANNEL_NAME_LEN - 4)) {
1072                         /* Line becomes too long: send it! */
1073                         if (!IRC_WriteStrClient(Client, "%s", str))
1074                                 return DISCONNECTED;
1075                         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1076                                  Client_ID(from), Client_ID(c));
1077                 }
1078         }
1079         if(str[strlen(str) - 1] != ':') {
1080                 /* There is data left to send: */
1081                 if (!IRC_WriteStrClient(Client, "%s", str))
1082                         return DISCONNECTED;
1083         }
1084
1085         /* IRC-Operator? */
1086         if (Client_HasMode(c, 'o') &&
1087                 !IRC_WriteStrClient(from, RPL_WHOISOPERATOR_MSG,
1088                                     Client_ID(from), Client_ID(c)))
1089                         return DISCONNECTED;
1090
1091         /* Connected using SSL? */
1092         if (Conn_UsesSSL(Client_Conn(c)) &&
1093                 !IRC_WriteStrClient(from, RPL_WHOISSSL_MSG,
1094                                     Client_ID(from), Client_ID(c)))
1095                         return DISCONNECTED;
1096
1097         /* Idle and signon time (local clients only!) */
1098         if (!Conf_MorePrivacy && Client_Conn(c) > NONE &&
1099                 !IRC_WriteStrClient(from, RPL_WHOISIDLE_MSG,
1100                                     Client_ID(from), Client_ID(c),
1101                                     (unsigned long)Conn_GetIdle(Client_Conn(c)),
1102                                     (unsigned long)Conn_GetSignon(Client_Conn(c))))
1103                         return DISCONNECTED;
1104
1105         /* Away? */
1106         if (Client_HasMode(c, 'a') &&
1107                 !IRC_WriteStrClient(from, RPL_AWAY_MSG,
1108                                     Client_ID(from), Client_ID(c),
1109                                     Client_Away(c)))
1110                         return DISCONNECTED;
1111
1112         return IRC_WriteStrClient(from, RPL_ENDOFWHOIS_MSG,
1113                                   Client_ID(from), Client_ID(c));
1114 } /* IRC_WHOIS_SendReply */
1115
1116
1117 /**
1118  * Handler for the IRC "WHOIS" command.
1119  *
1120  * See RFC 2812, 3.6.2 "Whois query".
1121  *
1122  * @param Client        The client from which this command has been received.
1123  * @param Req           Request structure with prefix and all parameters.
1124  * @return              CONNECTED or DISCONNECTED.
1125  */
1126 GLOBAL bool
1127 IRC_WHOIS( CLIENT *Client, REQUEST *Req )
1128 {
1129         CLIENT *from, *target, *c;
1130         unsigned int match_count = 0, found = 0;
1131         bool has_wildcards, is_remote;
1132         bool got_wildcard = false;
1133         const char *query;
1134
1135         assert( Client != NULL );
1136         assert( Req != NULL );
1137
1138         /* Bad number of parameters? */
1139         if (Req->argc < 1 || Req->argc > 2)
1140                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1141                                           Client_ID(Client), Req->command);
1142
1143         /* Search sender of the WHOIS */
1144         if (Client_Type(Client) == CLIENT_SERVER) {
1145                 from = Client_Search(Req->prefix);
1146         } else {
1147                 IRC_SetPenalty(Client, 1);
1148                 from = Client;
1149         }
1150         if (!from)
1151                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1152                                           Client_ID(Client), Req->prefix);
1153
1154         /* Get target server for this command */
1155         if (Req->argc > 1) {
1156                 /* Search the target server, which can be specified as a
1157                  * nick name on that server as well: */
1158                 target = Client_Search(Req->argv[0]);
1159                 if (!target)
1160                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
1161                                                 Client_ID(from), Req->argv[0]);
1162         } else
1163                 target = Client_ThisServer();
1164         assert(target != NULL);
1165
1166         /* Forward to other server? */
1167         if (Client_NextHop(target) != Client_ThisServer() &&
1168             Client_Type(Client_NextHop(target)) == CLIENT_SERVER)
1169                 return IRC_WriteStrClientPrefix(target, from,
1170                                                 "WHOIS %s :%s",
1171                                                 Req->argv[0], Req->argv[1]);
1172
1173         is_remote = Client_Conn(from) < 0;
1174         for (query = strtok(Req->argv[Req->argc - 1], ",");
1175                         query && found < 3;
1176                         query = strtok(NULL, ","), found++)
1177         {
1178                 has_wildcards = query[strcspn(query, "*?")] != 0;
1179                 /*
1180                  * follows ircd 2.10 implementation:
1181                  *  - handle up to 3 targets
1182                  *  - no wildcards for remote clients
1183                  *  - only one wildcard target per local client
1184                  *
1185                  *  also, at most ten matches are returned.
1186                  */
1187                 if (!has_wildcards || is_remote) {
1188                         c = Client_Search(query);
1189                         if (c) {
1190                                 if (!IRC_WHOIS_SendReply(Client, from, c))
1191                                         return DISCONNECTED;
1192                         } else {
1193                                 if (!IRC_WriteStrClient(Client,
1194                                                         ERR_NOSUCHNICK_MSG,
1195                                                         Client_ID(Client),
1196                                                         query))
1197                                         return DISCONNECTED;
1198                         }
1199                         continue;
1200                 }
1201                 if (got_wildcard) {
1202                         /* we already handled one wildcard query */
1203                         if (!IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1204                              Client_ID(Client), query))
1205                                 return DISCONNECTED;
1206                         continue;
1207                 }
1208                 got_wildcard = true;
1209                 IRC_SetPenalty(Client, 3);
1210
1211                 for (c = Client_First(); c && match_count < 10; c = Client_Next(c)) {
1212                         if (Client_Type(c) != CLIENT_USER)
1213                                 continue;
1214                         if (!MatchCaseInsensitive(query, Client_ID(c)))
1215                                 continue;
1216                         if (!IRC_WHOIS_SendReply(Client, from, c))
1217                                 return DISCONNECTED;
1218                         match_count++;
1219                 }
1220
1221                 if (match_count == 0)
1222                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1223                                 Client_ID(Client), Req->argv[Req->argc - 1]);
1224         }
1225         return CONNECTED;
1226 } /* IRC_WHOIS */
1227
1228
1229 static bool
1230 WHOWAS_EntryWrite(CLIENT *prefix, WHOWAS *entry)
1231 {
1232         char t_str[60];
1233
1234         (void)strftime(t_str, sizeof(t_str), "%a %b %d %H:%M:%S %Y",
1235                                         localtime(&entry->time));
1236
1237         if (!IRC_WriteStrClient(prefix, RPL_WHOWASUSER_MSG, Client_ID(prefix),
1238                         entry->id, entry->user, entry->host, entry->info))
1239                                 return DISCONNECTED;
1240
1241         return IRC_WriteStrClient(prefix, RPL_WHOISSERVER_MSG, Client_ID(prefix),
1242                   entry->id, entry->server, t_str);
1243 }
1244
1245 /**
1246  * IRC "WHOWAS" function.
1247  * This function implements the IRC command "WHOWHAS". It handles local
1248  * requests and request that should be forwarded to other servers.
1249  */
1250 GLOBAL bool
1251 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
1252 {
1253         CLIENT *target, *prefix;
1254         WHOWAS *whowas;
1255         char tok_buf[COMMAND_LEN];
1256         int max, last, count, i, nc;
1257         const char *nick;
1258
1259         assert( Client != NULL );
1260         assert( Req != NULL );
1261
1262         /* Do not reveal any info on disconnected users? */
1263         if (Conf_MorePrivacy)
1264                 return CONNECTED;
1265
1266         /* Wrong number of parameters? */
1267         if (Req->argc > 3)
1268                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1269                                         Client_ID(Client), Req->command);
1270         if (Req->argc < 1)
1271                 return IRC_WriteStrClient(Client, ERR_NONICKNAMEGIVEN_MSG, Client_ID(Client));
1272
1273         /* Search target */
1274         if (Req->argc == 3)
1275                 target = Client_Search(Req->argv[2]);
1276         else
1277                 target = Client_ThisServer();
1278
1279         /* Get prefix */
1280         if (Client_Type(Client) == CLIENT_SERVER)
1281                 prefix = Client_Search(Req->prefix);
1282         else
1283                 prefix = Client;
1284
1285         if (!prefix)
1286                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1287                                                 Client_ID(Client), Req->prefix);
1288
1289         /* Forward to other server? */
1290         if (target != Client_ThisServer()) {
1291                 if (!target || (Client_Type(target) != CLIENT_SERVER))
1292                         return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
1293                                         Client_ID(prefix), Req->argv[2]);
1294
1295                 /* Forward */
1296                 IRC_WriteStrClientPrefix( target, prefix, "WHOWAS %s %s %s",
1297                                           Req->argv[0], Req->argv[1],
1298                                           Req->argv[2] );
1299                 return CONNECTED;
1300         }
1301
1302         whowas = Client_GetWhowas( );
1303         last = Client_GetLastWhowasIndex( );
1304         if (last < 0)
1305                 last = 0;
1306
1307         max = DEFAULT_WHOWAS;
1308         if (Req->argc > 1) {
1309                 max = atoi(Req->argv[1]);
1310                 if (max < 1)
1311                         max = MAX_WHOWAS;
1312         }
1313
1314         /*
1315          * Break up the nick argument into a list of nicks, if applicable
1316          * Can't modify Req->argv[0] because we need it for RPL_ENDOFWHOWAS_MSG.
1317          */
1318         strlcpy(tok_buf, Req->argv[0], sizeof(tok_buf));
1319         nick = strtok(tok_buf, ",");
1320
1321         for (i=last, count=0; nick != NULL ; nick = strtok(NULL, ",")) {
1322                 nc = 0;
1323                 do {
1324                         /* Used entry? */
1325                         if (whowas[i].time > 0 && strcasecmp(nick, whowas[i].id) == 0) {
1326                                 if (!WHOWAS_EntryWrite(prefix, &whowas[i]))
1327                                         return DISCONNECTED;
1328                                 nc++;
1329                                 count++;
1330                         }
1331                         /* previous entry */
1332                         i--;
1333
1334                         /* "underflow", wrap around */
1335                         if (i < 0)
1336                                 i = MAX_WHOWAS - 1;
1337
1338                         if (nc && count >= max)
1339                                 break;
1340                 } while (i != last);
1341
1342                 if (nc == 0 && !IRC_WriteStrClient(prefix, ERR_WASNOSUCHNICK_MSG,
1343                                                 Client_ID(prefix), nick))
1344                         return DISCONNECTED;
1345         }
1346         return IRC_WriteStrClient(prefix, RPL_ENDOFWHOWAS_MSG, Client_ID(prefix), Req->argv[0]);
1347 } /* IRC_WHOWAS */
1348
1349
1350 /**
1351  * Send LUSERS reply to a client.
1352  *
1353  * @param Client The receipient of the information.
1354  * @return CONNECTED or DISCONNECTED.
1355  */
1356 GLOBAL bool
1357 IRC_Send_LUSERS(CLIENT *Client)
1358 {
1359         unsigned long cnt;
1360 #ifndef STRICT_RFC
1361         unsigned long max;
1362 #endif
1363
1364         assert(Client != NULL);
1365
1366         /* Users, services and serevers in the network */
1367         if (!IRC_WriteStrClient(Client, RPL_LUSERCLIENT_MSG, Client_ID(Client),
1368                                 Client_UserCount(), Client_ServiceCount(),
1369                                 Client_ServerCount()))
1370                 return DISCONNECTED;
1371
1372         /* Number of IRC operators */
1373         cnt = Client_OperCount( );
1374         if (cnt > 0) {
1375                 if (!IRC_WriteStrClient(Client, RPL_LUSEROP_MSG,
1376                                         Client_ID(Client), cnt))
1377                         return DISCONNECTED;
1378         }
1379
1380         /* Unknown connections */
1381         cnt = Client_UnknownCount( );
1382         if (cnt > 0) {
1383                 if (!IRC_WriteStrClient(Client, RPL_LUSERUNKNOWN_MSG,
1384                                         Client_ID(Client), cnt))
1385                         return DISCONNECTED;
1386         }
1387
1388         /* Number of created channels */
1389         if (!IRC_WriteStrClient(Client, RPL_LUSERCHANNELS_MSG,
1390                                 Client_ID(Client),
1391                                 Channel_CountVisible(Client)))
1392                 return DISCONNECTED;
1393
1394         /* Number of local users, services and servers */
1395         if (!IRC_WriteStrClient(Client, RPL_LUSERME_MSG, Client_ID(Client),
1396                                 Client_MyUserCount(), Client_MyServiceCount(),
1397                                 Client_MyServerCount()))
1398                 return DISCONNECTED;
1399
1400 #ifndef STRICT_RFC
1401         /* Maximum number of local users */
1402         cnt = Client_MyUserCount();
1403         max = Client_MyMaxUserCount();
1404         if (! IRC_WriteStrClient(Client, RPL_LOCALUSERS_MSG, Client_ID(Client),
1405                         cnt, max, cnt, max))
1406                 return DISCONNECTED;
1407         /* Maximum number of users in the network */
1408         cnt = Client_UserCount();
1409         max = Client_MaxUserCount();
1410         if(! IRC_WriteStrClient(Client, RPL_NETUSERS_MSG, Client_ID(Client),
1411                         cnt, max, cnt, max))
1412                 return DISCONNECTED;
1413         /* Connection counters */
1414         if (! IRC_WriteStrClient(Client, RPL_STATSCONN_MSG, Client_ID(Client),
1415                         Conn_CountMax(), Conn_CountAccepted()))
1416                 return DISCONNECTED;
1417 #endif
1418
1419         return CONNECTED;
1420 } /* IRC_Send_LUSERS */
1421
1422
1423 static bool
1424 Show_MOTD_Start(CLIENT *Client)
1425 {
1426         return IRC_WriteStrClient(Client, RPL_MOTDSTART_MSG,
1427                 Client_ID( Client ), Client_ID( Client_ThisServer( )));
1428 }
1429
1430 static bool
1431 Show_MOTD_Sendline(CLIENT *Client, const char *msg)
1432 {
1433         return IRC_WriteStrClient(Client, RPL_MOTD_MSG, Client_ID( Client ), msg);
1434 }
1435
1436 static bool
1437 Show_MOTD_End(CLIENT *Client)
1438 {
1439         return IRC_WriteStrClient( Client, RPL_ENDOFMOTD_MSG, Client_ID( Client ));
1440 }
1441
1442 #ifdef SSL_SUPPORT
1443 static bool Show_MOTD_SSLInfo(CLIENT *Client)
1444 {
1445         bool ret = true;
1446         char buf[COMMAND_LEN] = "Connected using Cipher ";
1447
1448         if (!Conn_GetCipherInfo(Client_Conn(Client), buf + 23, sizeof buf - 23))
1449                 return true;
1450
1451         if (!Show_MOTD_Sendline(Client, buf))
1452                 ret = false;
1453
1454         return ret;
1455 }
1456 #else
1457 static inline bool
1458 Show_MOTD_SSLInfo(UNUSED CLIENT *c)
1459 { return true; }
1460 #endif
1461
1462 GLOBAL bool
1463 IRC_Show_MOTD( CLIENT *Client )
1464 {
1465         const char *line;
1466         size_t len_tot, len_str;
1467
1468         assert( Client != NULL );
1469
1470         len_tot = array_bytes(&Conf_Motd);
1471         if (len_tot == 0 && !Conn_UsesSSL(Client_Conn(Client)))
1472                 return IRC_WriteStrClient(Client, ERR_NOMOTD_MSG, Client_ID(Client));
1473
1474         if (!Show_MOTD_Start(Client))
1475                 return DISCONNECTED;
1476
1477         line = array_start(&Conf_Motd);
1478         while (len_tot > 0) {
1479                 len_str = strlen(line) + 1;
1480
1481                 assert(len_tot >= len_str);
1482                 len_tot -= len_str;
1483
1484                 if (!Show_MOTD_Sendline(Client, line))
1485                         return DISCONNECTED;
1486                 line += len_str;
1487         }
1488
1489         if (!Show_MOTD_SSLInfo(Client))
1490                 return DISCONNECTED;
1491         return Show_MOTD_End(Client);
1492 } /* IRC_Show_MOTD */
1493
1494
1495 GLOBAL bool
1496 IRC_Send_NAMES( CLIENT *Client, CHANNEL *Chan )
1497 {
1498         bool is_visible, is_member;
1499         char str[LINE_LEN + 1];
1500         CL2CHAN *cl2chan;
1501         CLIENT *cl;
1502
1503         assert( Client != NULL );
1504         assert( Chan != NULL );
1505
1506         if( Channel_IsMemberOf( Chan, Client )) is_member = true;
1507         else is_member = false;
1508
1509         /* Do not print info on channel memberships to anyone that is not member? */
1510         if (Conf_MorePrivacy && !is_member)
1511                 return CONNECTED;
1512
1513         /* Secret channel? */
1514         if( ! is_member && strchr( Channel_Modes( Chan ), 's' )) return CONNECTED;
1515
1516         /* Alle Mitglieder suchen */
1517         snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1518         cl2chan = Channel_FirstMember( Chan );
1519         while( cl2chan )
1520         {
1521                 cl = Channel_GetClient( cl2chan );
1522
1523                 if( strchr( Client_Modes( cl ), 'i' )) is_visible = false;
1524                 else is_visible = true;
1525
1526                 if( is_member || is_visible )
1527                 {
1528                         /* Nick anhaengen */
1529                         if( str[strlen( str ) - 1] != ':' ) strlcat( str, " ", sizeof( str ));
1530                         if( strchr( Channel_UserModes( Chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
1531                         else if( strchr( Channel_UserModes( Chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
1532                         strlcat( str, Client_ID( cl ), sizeof( str ));
1533
1534                         if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
1535                         {
1536                                 /* Zeile wird zu lang: senden! */
1537                                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1538                                 snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1539                         }
1540                 }
1541
1542                 /* naechstes Mitglied suchen */
1543                 cl2chan = Channel_NextMember( Chan, cl2chan );
1544         }
1545         if( str[strlen( str ) - 1] != ':')
1546         {
1547                 /* Es sind noch Daten da, die gesendet werden muessen */
1548                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1549         }
1550
1551         return CONNECTED;
1552 } /* IRC_Send_NAMES */
1553
1554
1555 /**
1556  * Send the ISUPPORT numeric (005).
1557  * This numeric indicates the features that are supported by this server.
1558  * See <http://www.irc.org/tech_docs/005.html> for details.
1559  */
1560 GLOBAL bool
1561 IRC_Send_ISUPPORT(CLIENT * Client)
1562 {
1563         if (!IRC_WriteStrClient(Client, RPL_ISUPPORT1_MSG, Client_ID(Client),
1564                                 Conf_MaxJoins))
1565                 return DISCONNECTED;
1566         return IRC_WriteStrClient(Client, RPL_ISUPPORT2_MSG, Client_ID(Client),
1567                                   CHANNEL_NAME_LEN - 1, Conf_MaxNickLength - 1,
1568                                   COMMAND_LEN - 23, CLIENT_AWAY_LEN - 1,
1569                                   COMMAND_LEN - 113);
1570 } /* IRC_Send_ISUPPORT */
1571
1572
1573 /* -eof- */