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 GLOBAL bool
 204 IRC_LINKS( CLIENT *Client, REQUEST *Req )
 205 {
 206         CLIENT *target, *from, *c;
 207         char *mask;
 208
 209         assert( Client != NULL );
 210         assert( Req != NULL );
 211
 212         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 213
 214         /* Server-Mask ermitteln */
 215         if( Req->argc > 0 ) mask = Req->argv[Req->argc - 1];
 216         else mask = "*";
 217
 218         /* Absender ermitteln */
 219         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 220         else from = Client;
 221         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 222
 223         /* An anderen Server forwarden? */
 224         if( Req->argc == 2 )
 225         {
 226                 target = Client_Search( Req->argv[0] );
 227                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 228                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LINKS %s %s", Req->argv[0], Req->argv[1] );
 229         }
 230
 231         /* Wer ist der Absender? */
 232         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 233         else target = Client;
 234         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 235
 236         c = Client_First( );
 237         while( c )
 238         {
 239                 if( Client_Type( c ) == CLIENT_SERVER )
 240                 {
 241                         if( ! IRC_WriteStrClient( target, RPL_LINKS_MSG, Client_ID( target ), Client_ID( c ), Client_ID( Client_TopServer( c ) ? Client_TopServer( c ) : Client_ThisServer( )), Client_Hops( c ), Client_Info( c ))) return DISCONNECTED;
 242                 }
 243                 c = Client_Next( c );
 244         }
 245
 246         IRC_SetPenalty( target, 1 );
 247         return IRC_WriteStrClient( target, RPL_ENDOFLINKS_MSG, Client_ID( target ), mask );
 248 } /* IRC_LINKS */
 249
 250
 251 GLOBAL bool
 252 IRC_LUSERS( CLIENT *Client, REQUEST *Req )
 253 {
 254         CLIENT *target, *from;
 255
 256         assert( Client != NULL );
 257         assert( Req != NULL );
 258
 259         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 260
 261         /* Absender ermitteln */
 262         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 263         else from = Client;
 264         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 265
 266         /* An anderen Server forwarden? */
 267         if( Req->argc == 2 )
 268         {
 269                 target = Client_Search( Req->argv[1] );
 270                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 271                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LUSERS %s %s", Req->argv[0], Req->argv[1] );
 272         }
 273
 274         /* Wer ist der Absender? */
 275         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 276         else target = Client;
 277         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 278
 279         IRC_Send_LUSERS( target );
 280
 281         IRC_SetPenalty( target, 1 );
 282         return CONNECTED;
 283 } /* IRC_LUSERS */
 284
 285
 286 /**
 287  * Handler for the IRC command "SERVLIST".
 288  * List registered services, see RFC 2811, section 3.5.1: the syntax is
 289  * "SERVLIST [<mask> [<type>]]".
 290  */
 291 GLOBAL bool
 292 IRC_SERVLIST(CLIENT *Client, REQUEST *Req)
 293 {
 294         CLIENT *c;
 295
 296         assert(Client != NULL);
 297         assert(Req != NULL);
 298
 299         if (Req->argc > 2)
 300                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 301                                           Client_ID(Client), Req->command);
 302
 303         if (Req->argc < 2 || strcmp(Req->argv[1], "0") == 0) {
 304                 for (c = Client_First(); c!= NULL; c = Client_Next(c)) {
 305                         if (Client_Type(c) != CLIENT_SERVICE)
 306                                 continue;
 307                         if (Req->argc > 0 && !MatchCaseInsensitive(Req->argv[0],
 308                                                                   Client_ID(c)))
 309                                 continue;
 310                         if (!IRC_WriteStrClient(Client, RPL_SERVLIST_MSG,
 311                                         Client_ID(Client), Client_Mask(c),
 312                                         Client_Mask(Client_Introducer(c)), "*",
 313                                         0, Client_Hops(c), Client_Info(c)))
 314                                 return DISCONNECTED;
 315                 }
 316         }
 317
 318         return IRC_WriteStrClient(Client, RPL_SERVLISTEND_MSG, Client_ID(Client),
 319                                   Req->argc > 0 ? Req->argv[0] : "*",
 320                                   Req->argc > 1 ? Req->argv[1] : "0");
 321 } /* IRC_SERVLIST */
 322
 323
 324 GLOBAL bool
 325 IRC_MOTD( CLIENT *Client, REQUEST *Req )
 326 {
 327         CLIENT *from, *target;
 328
 329         assert( Client != NULL );
 330         assert( Req != NULL );
 331
 332         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 333
 334         /* From aus Prefix ermitteln */
 335         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 336         else from = Client;
 337         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 338
 339         if( Req->argc == 1 )
 340         {
 341                 /* forward? */
 342                 target = Client_Search( Req->argv[0] );
 343                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 344
 345                 if( target != Client_ThisServer( ))
 346                 {
 347                         /* Ok, anderer Server ist das Ziel: forwarden */
 348                         return IRC_WriteStrClientPrefix( target, from, "MOTD %s", Req->argv[0] );
 349                 }
 350         }
 351
 352         IRC_SetPenalty( from, 3 );
 353         return IRC_Show_MOTD( from );
 354 } /* IRC_MOTD */
 355
 356
 357 GLOBAL bool
 358 IRC_NAMES( CLIENT *Client, REQUEST *Req )
 359 {
 360         char rpl[COMMAND_LEN], *ptr;
 361         CLIENT *target, *from, *c;
 362         CHANNEL *chan;
 363
 364         assert( Client != NULL );
 365         assert( Req != NULL );
 366
 367         if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 368
 369         /* use prefix to determine "From" */
 370         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 371         else from = Client;
 372         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 373
 374         if( Req->argc == 2 )
 375         {
 376                 /* forward to another server? */
 377                 target = Client_Search( Req->argv[1] );
 378                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 379
 380                 if( target != Client_ThisServer( )) {
 381                         /* target is another server, forward */
 382                         return IRC_WriteStrClientPrefix( target, from, "NAMES %s :%s", Req->argv[0], Req->argv[1] );
 383                 }
 384         }
 385
 386         if( Req->argc > 0 )
 387         {
 388                 /* bestimmte Channels durchgehen */
 389                 ptr = strtok( Req->argv[0], "," );
 390                 while( ptr )
 391                 {
 392                         chan = Channel_Search( ptr );
 393                         if( chan )
 394                         {
 395                                 /* print name */
 396                                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 397                         }
 398                         if( ! IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), ptr )) return DISCONNECTED;
 399
 400                         /* get next channel name */
 401                         ptr = strtok( NULL, "," );
 402                 }
 403                 return CONNECTED;
 404         }
 405
 406         chan = Channel_First( );
 407         while( chan )
 408         {
 409                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 410
 411                 chan = Channel_Next( chan );
 412         }
 413
 414         /* Now print all clients which are not in any channel */
 415         c = Client_First( );
 416         snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 417         while( c )
 418         {
 419                 if(( Client_Type( c ) == CLIENT_USER ) && ( Channel_FirstChannelOf( c ) == NULL ) && ( ! strchr( Client_Modes( c ), 'i' )))
 420                 {
 421                         /* its a user, concatenate ... */
 422                         if( rpl[strlen( rpl ) - 1] != ':' ) strlcat( rpl, " ", sizeof( rpl ));
 423                         strlcat( rpl, Client_ID( c ), sizeof( rpl ));
 424
 425                         if( strlen( rpl ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
 426                         {
 427                                 /* Line is gwoing too long, send now */
 428                                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 429                                 snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 430                         }
 431                 }
 432
 433                 c = Client_Next( c );
 434         }
 435         if( rpl[strlen( rpl ) - 1] != ':')
 436         {
 437                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 438         }
 439
 440         IRC_SetPenalty( from, 1 );
 441         return IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), "*" );
 442 } /* IRC_NAMES */
 443
 444
 445 static unsigned int
 446 t_diff(time_t *t, const time_t d)
 447 {
 448         time_t diff, remain;
 449
 450         diff = *t / d;
 451         remain = diff * d;
 452         *t -= remain;
 453
 454         return (unsigned int)diff;
 455 }
 456
 457
 458 static unsigned int
 459 uptime_days(time_t *now)
 460 {
 461         return t_diff(now, 60 * 60 * 24);
 462 }
 463
 464
 465 static unsigned int
 466 uptime_hrs(time_t *now)
 467 {
 468         return t_diff(now, 60 * 60);
 469 }
 470
 471
 472 static unsigned int
 473 uptime_mins(time_t *now)
 474 {
 475          return t_diff(now, 60);
 476 }
 477
 478
 479 /**
 480  * Handler for the IRC command "STATS".
 481  * See RFC 2812 section 3.4.4.
 482  */
 483 GLOBAL bool
 484 IRC_STATS( CLIENT *Client, REQUEST *Req )
 485 {
 486         CLIENT *from, *target, *cl;
 487         CONN_ID con;
 488         char query;
 489         COMMAND *cmd;
 490         time_t time_now;
 491         unsigned int days, hrs, mins;
 492         struct list_head *list;
 493         struct list_elem *list_item;
 494
 495         assert(Client != NULL);
 496         assert(Req != NULL);
 497
 498         if (Req->argc > 2)
 499                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 500                                           Client_ID(Client), Req->command);
 501
 502         /* use prefix to determine "From" */
 503         if (Client_Type(Client) == CLIENT_SERVER)
 504                 from = Client_Search(Req->prefix);
 505         else
 506                 from = Client;
 507
 508         if (!from)
 509                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 510                                           Client_ID(Client), Req->prefix);
 511
 512         if (Req->argc == 2) {
 513                 /* forward to another server? */
 514                 target = Client_Search(Req->argv[1]);
 515                 if ((!target) || (Client_Type(target) != CLIENT_SERVER))
 516                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 517                                                  Client_ID(from), Req->argv[1]);
 518
 519                 if (target != Client_ThisServer()) {
 520                         /* forward to another server */
 521                         return IRC_WriteStrClientPrefix(target, from,
 522                                      "STATS %s %s", Req->argv[0], Req->argv[1]);
 523                 }
 524         }
 525
 526         if (Req->argc > 0)
 527                 query = Req->argv[0][0] ? Req->argv[0][0] : '*';
 528         else
 529                 query = '*';
 530
 531         switch (query) {
 532         case 'g':       /* Network-wide bans ("G-Lines") */
 533         case 'G':
 534         case 'k':       /* Server-local bans ("K-Lines") */
 535         case 'K':
 536                 if (!Client_HasMode(from, 'o'))
 537                     return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
 538                                               Client_ID(from));
 539                 if (query == 'g' || query == 'G')
 540                         list = Class_GetList(CLASS_GLINE);
 541                 else
 542                         list = Class_GetList(CLASS_KLINE);
 543                         list_item = Lists_GetFirst(list);
 544                         while (list_item) {
 545                                 if (!IRC_WriteStrClient(from, RPL_STATSXLINE_MSG,
 546                                                 Client_ID(from), query,
 547                                                 Lists_GetMask(list_item),
 548                                                 Lists_GetValidity(list_item),
 549                                                 Lists_GetReason(list_item)))
 550                                         return DISCONNECTED;
 551                                 list_item = Lists_GetNext(list_item);
 552                         }
 553                 break;
 554         case 'l':       /* Link status (servers and own link) */
 555         case 'L':
 556                 time_now = time(NULL);
 557                 for (con = Conn_First(); con != NONE; con = Conn_Next(con)) {
 558                         cl = Conn_GetClient(con);
 559                         if (!cl)
 560                                 continue;
 561                         if ((Client_Type(cl) == CLIENT_SERVER)
 562                             || (cl == Client)) {
 563                                 /* Server link or our own connection */
 564 #ifdef ZLIB
 565                                 if (Conn_Options(con) & CONN_ZIP) {
 566                                         if (!IRC_WriteStrClient
 567                                             (from, RPL_STATSLINKINFOZIP_MSG,
 568                                              Client_ID(from), Client_Mask(cl),
 569                                              Conn_SendQ(con), Conn_SendMsg(con),
 570                                              Zip_SendBytes(con),
 571                                              Conn_SendBytes(con),
 572                                              Conn_RecvMsg(con),
 573                                              Zip_RecvBytes(con),
 574                                              Conn_RecvBytes(con),
 575                                              (long)(time_now - Conn_StartTime(con))))
 576                                                 return DISCONNECTED;
 577                                         continue;
 578                                 }
 579 #endif
 580                                 if (!IRC_WriteStrClient
 581                                     (from, RPL_STATSLINKINFO_MSG,
 582                                      Client_ID(from), Client_Mask(cl),
 583                                      Conn_SendQ(con), Conn_SendMsg(con),
 584                                      Conn_SendBytes(con), Conn_RecvMsg(con),
 585                                      Conn_RecvBytes(con),
 586                                      (long)(time_now - Conn_StartTime(con))))
 587                                         return DISCONNECTED;
 588                         }
 589                 }
 590                 break;
 591         case 'm':       /* IRC command status (usage count) */
 592         case 'M':
 593                 cmd = Parse_GetCommandStruct();
 594                 for (; cmd->name; cmd++) {
 595                         if (cmd->lcount == 0 && cmd->rcount == 0)
 596                                 continue;
 597                         if (!IRC_WriteStrClient
 598                             (from, RPL_STATSCOMMANDS_MSG, Client_ID(from),
 599                              cmd->name, cmd->lcount, cmd->bytes, cmd->rcount))
 600                                 return DISCONNECTED;
 601                 }
 602                 break;
 603         case 'u':       /* Server uptime */
 604         case 'U':
 605                 time_now = time(NULL) - NGIRCd_Start;
 606                 days = uptime_days(&time_now);
 607                 hrs = uptime_hrs(&time_now);
 608                 mins = uptime_mins(&time_now);
 609                 if (!IRC_WriteStrClient(from, RPL_STATSUPTIME, Client_ID(from),
 610                                        days, hrs, mins, (unsigned int)time_now))
 611                         return DISCONNECTED;
 612                 break;
 613         }
 614
 615         IRC_SetPenalty(from, 2);
 616         return IRC_WriteStrClient(from, RPL_ENDOFSTATS_MSG,
 617                                   Client_ID(from), query);
 618 } /* IRC_STATS */
 619
 620
 621 /**
 622  * Handler for the IRC command "SUMMON".
 623  * See RFC 2812 section 4.5. ngIRCd doesn't implement this functionality and
 624  * therefore answers with ERR_SUMMONDISABLED.
 625  */
 626 GLOBAL bool
 627 IRC_SUMMON(CLIENT * Client, REQUEST * Req)
 628 {
 629         return IRC_WriteStrClient(Client, ERR_SUMMONDISABLED_MSG,
 630                                   Client_ID(Client), Req->command);
 631 } /* IRC_SUMMON */
 632
 633
 634 GLOBAL bool
 635 IRC_TIME( CLIENT *Client, REQUEST *Req )
 636 {
 637         CLIENT *from, *target;
 638         char t_str[64];
 639         time_t t;
 640
 641         assert( Client != NULL );
 642         assert( Req != NULL );
 643
 644         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 645
 646         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 647         else from = Client;
 648         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 649
 650         if( Req->argc == 1 )
 651         {
 652                 target = Client_Search( Req->argv[0] );
 653                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[0] );
 654
 655                 if( target != Client_ThisServer( ))
 656                 {
 657                         return IRC_WriteStrClientPrefix( target, from, "TIME %s", Req->argv[0] );
 658                 }
 659         }
 660
 661         t = time( NULL );
 662         (void)strftime( t_str, 60, "%A %B %d %Y -- %H:%M %Z", localtime( &t ));
 663         return IRC_WriteStrClient( from, RPL_TIME_MSG, Client_ID( from ), Client_ID( Client_ThisServer( )), t_str );
 664 } /* IRC_TIME */
 665
 666
 667 /**
 668  * Handler for the IRC command "USERHOST".
 669  * See RFC 2812 section 4.8.
 670  */
 671 GLOBAL bool
 672 IRC_USERHOST(CLIENT *Client, REQUEST *Req)
 673 {
 674         char rpl[COMMAND_LEN];
 675         CLIENT *c;
 676         int max, i;
 677
 678         assert(Client != NULL);
 679         assert(Req != NULL);
 680
 681         if ((Req->argc < 1))
 682                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 683                                           Client_ID(Client), Req->command);
 684
 685         if (Req->argc > 5)
 686                 max = 5;
 687         else
 688                 max = Req->argc;
 689
 690         strlcpy(rpl, RPL_USERHOST_MSG, sizeof rpl);
 691         for (i = 0; i < max; i++) {
 692                 c = Client_Search(Req->argv[i]);
 693                 if (c && (Client_Type(c) == CLIENT_USER)) {
 694                         /* This Nick is "online" */
 695                         strlcat(rpl, Client_ID(c), sizeof(rpl));
 696                         if (Client_HasMode(c, 'o'))
 697                                 strlcat(rpl, "*", sizeof(rpl));
 698                         strlcat(rpl, "=", sizeof(rpl));
 699                         if (Client_HasMode(c, 'a'))
 700                                 strlcat(rpl, "-", sizeof(rpl));
 701                         else
 702                                 strlcat(rpl, "+", sizeof(rpl));
 703                         strlcat(rpl, Client_User(c), sizeof(rpl));
 704                         strlcat(rpl, "@", sizeof(rpl));
 705                         strlcat(rpl, Client_HostnameCloaked(c), sizeof(rpl));
 706                         strlcat(rpl, " ", sizeof(rpl));
 707                 }
 708         }
 709         ngt_TrimLastChr(rpl, ' ');
 710
 711         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 712 } /* IRC_USERHOST */
 713
 714
 715 /**
 716  * Handler for the IRC command "USERS".
 717  * See RFC 2812 section 4.6. As suggested there the command is disabled.
 718  */
 719 GLOBAL bool
 720 IRC_USERS(CLIENT * Client, REQUEST * Req)
 721 {
 722         return IRC_WriteStrClient(Client, ERR_USERSDISABLED_MSG,
 723                                   Client_ID(Client), Req->command);
 724 } /* IRC_USERS */
 725
 726
 727 GLOBAL bool
 728 IRC_VERSION( CLIENT *Client, REQUEST *Req )
 729 {
 730         CLIENT *target, *prefix;
 731
 732         assert( Client != NULL );
 733         assert( Req != NULL );
 734
 735         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 736
 737         /* Ziel suchen */
 738         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
 739         else target = Client_ThisServer( );
 740
 741         /* Prefix ermitteln */
 742         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
 743         else prefix = Client;
 744         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 745
 746         /* An anderen Server weiterleiten? */
 747         if( target != Client_ThisServer( ))
 748         {
 749                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
 750
 751                 /* forwarden */
 752                 IRC_WriteStrClientPrefix( target, prefix, "VERSION %s", Req->argv[0] );
 753                 return CONNECTED;
 754         }
 755
 756         /* send version information */
 757         IRC_SetPenalty(Client, 1);
 758         return IRC_WriteStrClient(Client, RPL_VERSION_MSG, Client_ID(prefix),
 759                                   PACKAGE_NAME, PACKAGE_VERSION,
 760                                   NGIRCd_DebugLevel, Conf_ServerName,
 761                                   NGIRCd_VersionAddition);
 762 } /* IRC_VERSION */
 763
 764
 765 static bool
 766 write_whoreply(CLIENT *Client, CLIENT *c, const char *channelname, const char *flags)
 767 {
 768         return IRC_WriteStrClient(Client, RPL_WHOREPLY_MSG, Client_ID(Client),
 769                                   channelname, Client_User(c),
 770                                   Client_HostnameCloaked(c),
 771                                   Client_ID(Client_Introducer(c)), Client_ID(c),
 772                                   flags, Client_Hops(c), Client_Info(c));
 773 }
 774
 775
 776 static const char *
 777 who_flags_status(const char *client_modes)
 778 {
 779         if (strchr(client_modes, 'a'))
 780                 return "G"; /* away */
 781         return "H";
 782 }
 783
 784
 785 static const char *
 786 who_flags_qualifier(const char *chan_user_modes)
 787 {
 788         if (strchr(chan_user_modes, 'o'))
 789                 return "@";
 790         else if (strchr(chan_user_modes, 'v'))
 791                 return "+";
 792         return "";
 793 }
 794
 795
 796 /**
 797  * Send WHO reply for a "channel target" ("WHO #channel").
 798  *
 799  * @param Client Client requesting the information.
 800  * @param Chan Channel being requested.
 801  * @param OnlyOps Only display IRC operators.
 802  * @return CONNECTED or DISCONNECTED.
 803  */
 804 static bool
 805 IRC_WHO_Channel(CLIENT *Client, CHANNEL *Chan, bool OnlyOps)
 806 {
 807         bool is_visible, is_member, is_ircop;
 808         CL2CHAN *cl2chan;
 809         const char *client_modes;
 810         const char *chan_user_modes;
 811         char flags[8];
 812         CLIENT *c;
 813
 814         assert( Client != NULL );
 815         assert( Chan != NULL );
 816
 817         is_member = Channel_IsMemberOf(Chan, Client);
 818
 819         /* Secret channel? */
 820         if (!is_member && strchr(Channel_Modes(Chan), 's'))
 821                 return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG,
 822                                           Client_ID(Client), Channel_Name(Chan));
 823
 824         cl2chan = Channel_FirstMember(Chan);
 825         for (; cl2chan ; cl2chan = Channel_NextMember(Chan, cl2chan)) {
 826                 c = Channel_GetClient(cl2chan);
 827
 828                 client_modes = Client_Modes(c);
 829                 is_ircop = strchr(client_modes, 'o') != NULL;
 830                 if (OnlyOps && !is_ircop)
 831                         continue;
 832
 833                 is_visible = strchr(client_modes, 'i') == NULL;
 834                 if (is_member || is_visible) {
 835                         strcpy(flags, who_flags_status(client_modes));
 836                         if (is_ircop)
 837                                 strlcat(flags, "*", sizeof(flags));
 838
 839                         chan_user_modes = Channel_UserModes(Chan, c);
 840                         strlcat(flags, who_flags_qualifier(chan_user_modes),
 841                                 sizeof(flags));
 842
 843                         if (!write_whoreply(Client, c, Channel_Name(Chan),
 844                                             flags))
 845                                 return DISCONNECTED;
 846                 }
 847         }
 848         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 849                                   Channel_Name(Chan));
 850 }
 851
 852
 853 /**
 854  * Send WHO reply for a "mask target" ("WHO m*sk").
 855  *
 856  * @param Client Client requesting the information.
 857  * @param Mask Mask being requested or NULL for "all" clients.
 858  * @param OnlyOps Only display IRC operators.
 859  * @return CONNECTED or DISCONNECTED.
 860  */
 861 static bool
 862 IRC_WHO_Mask(CLIENT *Client, char *Mask, bool OnlyOps)
 863 {
 864         CLIENT *c;
 865         CL2CHAN *cl2chan;
 866         CHANNEL *chan;
 867         bool client_match, is_visible;
 868         char flags[4];
 869
 870         assert (Client != NULL);
 871
 872         if (Mask)
 873                 ngt_LowerStr(Mask);
 874
 875         for (c = Client_First(); c != NULL; c = Client_Next(c)) {
 876                 if (Client_Type(c) != CLIENT_USER)
 877                         continue;
 878
 879                 if (OnlyOps && !Client_HasMode(c, 'o'))
 880                         continue;
 881
 882                 if (Mask) {
 883                         /* Match pattern against user host/server/name/nick */
 884                         client_match = MatchCaseInsensitive(Mask,
 885                                                 Client_Hostname(c));
 886                         if (!client_match)
 887                                 client_match = MatchCaseInsensitive(Mask,
 888                                                 Client_ID(Client_Introducer(c)));
 889                         if (!client_match)
 890                                 client_match = MatchCaseInsensitive(Mask,
 891                                                 Client_Info(c));
 892                         if (!client_match)
 893                                 client_match = MatchCaseInsensitive(Mask,
 894                                                 Client_ID(c));
 895                         if (!client_match)
 896                                 continue;       /* no match: skip this client */
 897                 }
 898
 899                 is_visible = !Client_HasMode(c, 'i');
 900
 901                 /* Target client is invisible, but mask matches exactly? */
 902                 if (!is_visible && Mask && strcasecmp(Client_ID(c), Mask) == 0)
 903                         is_visible = true;
 904
 905                 /* Target still invisible, but are both on the same channel? */
 906                 if (!is_visible) {
 907                         cl2chan = Channel_FirstChannelOf(Client);
 908                         while (cl2chan && !is_visible) {
 909                                 chan = Channel_GetChannel(cl2chan);
 910                                 if (Channel_IsMemberOf(chan, c))
 911                                         is_visible = true;
 912                                 cl2chan = Channel_NextChannelOf(Client, cl2chan);
 913                         }
 914                 }
 915
 916                 if (!is_visible)        /* target user is not visible */
 917                         continue;
 918
 919                 strcpy(flags, who_flags_status(Client_Modes(c)));
 920                 if (strchr(Client_Modes(c), 'o'))
 921                         strlcat(flags, "*", sizeof(flags));
 922
 923                 if (!write_whoreply(Client, c, "*", flags))
 924                         return DISCONNECTED;
 925
 926         }
 927
 928         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 929                                   Mask ? Mask : "*");
 930 }
 931
 932
 933 /**
 934  * Handler for the IRC "WHO" command.
 935  *
 936  * See RFC 2812, 3.6.1 "Who query".
 937  *
 938  * @param Client The client from which this command has been received.
 939  * @param Req Request structure with prefix and all parameters.
 940  * @return CONNECTED or DISCONNECTED.
 941  */
 942 GLOBAL bool
 943 IRC_WHO(CLIENT *Client, REQUEST *Req)
 944 {
 945         bool only_ops;
 946         CHANNEL *chan;
 947
 948         assert (Client != NULL);
 949         assert (Req != NULL);
 950
 951         if (Req->argc > 2)
 952                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 953                                           Client_ID(Client), Req->command);
 954
 955         only_ops = false;
 956
 957         if (Req->argc == 2) {
 958                 if (strcmp(Req->argv[1], "o") == 0)
 959                         only_ops = true;
 960 #ifdef STRICT_RFC
 961                 else
 962                         return IRC_WriteStrClient(Client,
 963                                                   ERR_NEEDMOREPARAMS_MSG,
 964                                                   Client_ID(Client),
 965                                                   Req->command);
 966 #endif
 967         }
 968
 969         IRC_SetPenalty(Client, 1);
 970         if (Req->argc >= 1) {
 971                 /* Channel or mask given */
 972                 chan = Channel_Search(Req->argv[0]);
 973                 if (chan) {
 974                         /* Members of a channel have been requested */
 975                         IRC_SetPenalty(Client, 1);
 976                         return IRC_WHO_Channel(Client, chan, only_ops);
 977                 }
 978                 if (strcmp(Req->argv[0], "0") != 0) {
 979                         /* A mask has been given. But please note this RFC
 980                          * stupidity: "0" is same as no arguments ... */
 981                         IRC_SetPenalty(Client, 3);
 982                         return IRC_WHO_Mask(Client, Req->argv[0], only_ops);
 983                 }
 984         }
 985
 986         /* No channel or (valid) mask given */
 987         IRC_SetPenalty(Client, 2);
 988         return IRC_WHO_Mask(Client, NULL, only_ops);
 989 } /* IRC_WHO */
 990
 991
 992 /**
 993  * Generate WHOIS reply of one actual client.
 994  *
 995  * @param Client        The client from which this command has been received.
 996  * @param from          The client requesting the information ("originator").
 997  * @param c             The client of which information should be returned.
 998  * @returns             CONNECTED or DISCONNECTED.
 999  */
1000 static bool
1001 IRC_WHOIS_SendReply(CLIENT *Client, CLIENT *from, CLIENT *c)
1002 {
1003         char str[LINE_LEN + 1];
1004         CL2CHAN *cl2chan;
1005         CHANNEL *chan;
1006
1007         /* Nick, user, hostname and client info */
1008         if (!IRC_WriteStrClient(from, RPL_WHOISUSER_MSG, Client_ID(from),
1009                                 Client_ID(c), Client_User(c),
1010                                 Client_HostnameCloaked(c), Client_Info(c)))
1011                 return DISCONNECTED;
1012
1013         /* Server */
1014         if (!IRC_WriteStrClient(from, RPL_WHOISSERVER_MSG, Client_ID(from),
1015                                 Client_ID(c), Client_ID(Client_Introducer(c)),
1016                                 Client_Info(Client_Introducer(c))))
1017                 return DISCONNECTED;
1018
1019         /* Channels */
1020         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1021                  Client_ID(from), Client_ID(c));
1022         cl2chan = Channel_FirstChannelOf(c);
1023         while (cl2chan) {
1024                 chan = Channel_GetChannel(cl2chan);
1025                 assert(chan != NULL);
1026
1027                 /* next */
1028                 cl2chan = Channel_NextChannelOf(c, cl2chan);
1029
1030                 /* Secret channel? */
1031                 if (strchr(Channel_Modes(chan), 's')
1032                     && !Channel_IsMemberOf(chan, Client))
1033                         continue;
1034
1035                 /* Local channel and request is not from a user? */
1036                 if (Client_Type(Client) == CLIENT_SERVER
1037                     && Channel_IsLocal(chan))
1038                         continue;
1039
1040                 /* Concatenate channel names */
1041                 if (str[strlen(str) - 1] != ':')
1042                         strlcat(str, " ", sizeof(str));
1043
1044                 strlcat(str, who_flags_qualifier(Channel_UserModes(chan, c)),
1045                                                  sizeof(str));
1046                 strlcat(str, Channel_Name(chan), sizeof(str));
1047
1048                 if (strlen(str) > (LINE_LEN - CHANNEL_NAME_LEN - 4)) {
1049                         /* Line becomes too long: send it! */
1050                         if (!IRC_WriteStrClient(Client, "%s", str))
1051                                 return DISCONNECTED;
1052                         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1053                                  Client_ID(from), Client_ID(c));
1054                 }
1055         }
1056         if(str[strlen(str) - 1] != ':') {
1057                 /* There is data left to send: */
1058                 if (!IRC_WriteStrClient(Client, "%s", str))
1059                         return DISCONNECTED;
1060         }
1061
1062         /* IRC-Operator? */
1063         if (Client_HasMode(c, 'o') &&
1064                 !IRC_WriteStrClient(from, RPL_WHOISOPERATOR_MSG,
1065                                     Client_ID(from), Client_ID(c)))
1066                         return DISCONNECTED;
1067
1068         /* Connected using SSL? */
1069         if (Conn_UsesSSL(Client_Conn(c)) &&
1070                 !IRC_WriteStrClient(from, RPL_WHOISSSL_MSG,
1071                                     Client_ID(from), Client_ID(c)))
1072                         return DISCONNECTED;
1073
1074         /* Idle and signon time (local clients only!) */
1075         if (!Conf_MorePrivacy && Client_Conn(c) > NONE &&
1076                 !IRC_WriteStrClient(from, RPL_WHOISIDLE_MSG,
1077                                     Client_ID(from), Client_ID(c),
1078                                     (unsigned long)Conn_GetIdle(Client_Conn(c)),
1079                                     (unsigned long)Conn_GetSignon(Client_Conn(c))))
1080                         return DISCONNECTED;
1081
1082         /* Away? */
1083         if (Client_HasMode(c, 'a') &&
1084                 !IRC_WriteStrClient(from, RPL_AWAY_MSG,
1085                                     Client_ID(from), Client_ID(c),
1086                                     Client_Away(c)))
1087                         return DISCONNECTED;
1088
1089         return IRC_WriteStrClient(from, RPL_ENDOFWHOIS_MSG,
1090                                   Client_ID(from), Client_ID(c));
1091 } /* IRC_WHOIS_SendReply */
1092
1093
1094 /**
1095  * Handler for the IRC "WHOIS" command.
1096  *
1097  * See RFC 2812, 3.6.2 "Whois query".
1098  *
1099  * @param Client        The client from which this command has been received.
1100  * @param Req           Request structure with prefix and all parameters.
1101  * @return              CONNECTED or DISCONNECTED.
1102  */
1103 GLOBAL bool
1104 IRC_WHOIS( CLIENT *Client, REQUEST *Req )
1105 {
1106         CLIENT *from, *target, *c;
1107         unsigned int match_count = 0, found = 0;
1108         bool has_wildcards, is_remote;
1109         bool got_wildcard = false;
1110         const char *query;
1111
1112         assert( Client != NULL );
1113         assert( Req != NULL );
1114
1115         /* Bad number of parameters? */
1116         if (Req->argc < 1 || Req->argc > 2)
1117                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1118                                           Client_ID(Client), Req->command);
1119
1120         /* Search sender of the WHOIS */
1121         if (Client_Type(Client) == CLIENT_SERVER) {
1122                 from = Client_Search(Req->prefix);
1123         } else {
1124                 IRC_SetPenalty(Client, 1);
1125                 from = Client;
1126         }
1127         if (!from)
1128                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1129                                           Client_ID(Client), Req->prefix);
1130
1131         /* Get target server for this command */
1132         if (Req->argc > 1) {
1133                 /* Search the target server, which can be specified as a
1134                  * nick name on that server as well: */
1135                 target = Client_Search(Req->argv[0]);
1136                 if (!target)
1137                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
1138                                                 Client_ID(from), Req->argv[0]);
1139         } else
1140                 target = Client_ThisServer();
1141         assert(target != NULL);
1142
1143         /* Forward to other server? */
1144         if (Client_NextHop(target) != Client_ThisServer() &&
1145             Client_Type(Client_NextHop(target)) == CLIENT_SERVER)
1146                 return IRC_WriteStrClientPrefix(target, from,
1147                                                 "WHOIS %s :%s",
1148                                                 Req->argv[0], Req->argv[1]);
1149
1150         is_remote = Client_Conn(from) < 0;
1151         for (query = strtok(Req->argv[Req->argc - 1], ",");
1152                         query && found < 3;
1153                         query = strtok(NULL, ","), found++)
1154         {
1155                 has_wildcards = query[strcspn(query, "*?")] != 0;
1156                 /*
1157                  * follows ircd 2.10 implementation:
1158                  *  - handle up to 3 targets
1159                  *  - no wildcards for remote clients
1160                  *  - only one wildcard target per local client
1161                  *
1162                  *  also, at most ten matches are returned.
1163                  */
1164                 if (!has_wildcards || is_remote) {
1165                         c = Client_Search(query);
1166                         if (c) {
1167                                 if (!IRC_WHOIS_SendReply(Client, from, c))
1168                                         return DISCONNECTED;
1169                         } else {
1170                                 if (!IRC_WriteStrClient(Client,
1171                                                         ERR_NOSUCHNICK_MSG,
1172                                                         Client_ID(Client),
1173                                                         query))
1174                                         return DISCONNECTED;
1175                         }
1176                         continue;
1177                 }
1178                 if (got_wildcard) {
1179                         /* we already handled one wildcard query */
1180                         if (!IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1181                              Client_ID(Client), query))
1182                                 return DISCONNECTED;
1183                         continue;
1184                 }
1185                 got_wildcard = true;
1186                 IRC_SetPenalty(Client, 3);
1187
1188                 for (c = Client_First(); c && match_count < 10; c = Client_Next(c)) {
1189                         if (Client_Type(c) != CLIENT_USER)
1190                                 continue;
1191                         if (!MatchCaseInsensitive(query, Client_ID(c)))
1192                                 continue;
1193                         if (!IRC_WHOIS_SendReply(Client, from, c))
1194                                 return DISCONNECTED;
1195                         match_count++;
1196                 }
1197
1198                 if (match_count == 0)
1199                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1200                                 Client_ID(Client), Req->argv[Req->argc - 1]);
1201         }
1202         return CONNECTED;
1203 } /* IRC_WHOIS */
1204
1205
1206 static bool
1207 WHOWAS_EntryWrite(CLIENT *prefix, WHOWAS *entry)
1208 {
1209         char t_str[60];
1210
1211         (void)strftime(t_str, sizeof(t_str), "%a %b %d %H:%M:%S %Y",
1212                                         localtime(&entry->time));
1213
1214         if (!IRC_WriteStrClient(prefix, RPL_WHOWASUSER_MSG, Client_ID(prefix),
1215                         entry->id, entry->user, entry->host, entry->info))
1216                                 return DISCONNECTED;
1217
1218         return IRC_WriteStrClient(prefix, RPL_WHOISSERVER_MSG, Client_ID(prefix),
1219                   entry->id, entry->server, t_str);
1220 }
1221
1222 /**
1223  * IRC "WHOWAS" function.
1224  * This function implements the IRC command "WHOWHAS". It handles local
1225  * requests and request that should be forwarded to other servers.
1226  */
1227 GLOBAL bool
1228 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
1229 {
1230         CLIENT *target, *prefix;
1231         WHOWAS *whowas;
1232         char tok_buf[COMMAND_LEN];
1233         int max, last, count, i, nc;
1234         const char *nick;
1235
1236         assert( Client != NULL );
1237         assert( Req != NULL );
1238
1239         /* Do not reveal any info on disconnected users? */
1240         if (Conf_MorePrivacy)
1241                 return CONNECTED;
1242
1243         /* Wrong number of parameters? */
1244         if (Req->argc > 3)
1245                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1246                                         Client_ID(Client), Req->command);
1247         if (Req->argc < 1)
1248                 return IRC_WriteStrClient(Client, ERR_NONICKNAMEGIVEN_MSG, Client_ID(Client));
1249
1250         /* Search target */
1251         if (Req->argc == 3)
1252                 target = Client_Search(Req->argv[2]);
1253         else
1254                 target = Client_ThisServer();
1255
1256         /* Get prefix */
1257         if (Client_Type(Client) == CLIENT_SERVER)
1258                 prefix = Client_Search(Req->prefix);
1259         else
1260                 prefix = Client;
1261
1262         if (!prefix)
1263                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1264                                                 Client_ID(Client), Req->prefix);
1265
1266         /* Forward to other server? */
1267         if (target != Client_ThisServer()) {
1268                 if (!target || (Client_Type(target) != CLIENT_SERVER))
1269                         return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
1270                                         Client_ID(prefix), Req->argv[2]);
1271
1272                 /* Forward */
1273                 IRC_WriteStrClientPrefix( target, prefix, "WHOWAS %s %s %s",
1274                                           Req->argv[0], Req->argv[1],
1275                                           Req->argv[2] );
1276                 return CONNECTED;
1277         }
1278
1279         whowas = Client_GetWhowas( );
1280         last = Client_GetLastWhowasIndex( );
1281         if (last < 0)
1282                 last = 0;
1283
1284         max = DEFAULT_WHOWAS;
1285         if (Req->argc > 1) {
1286                 max = atoi(Req->argv[1]);
1287                 if (max < 1)
1288                         max = MAX_WHOWAS;
1289         }
1290
1291         /*
1292          * Break up the nick argument into a list of nicks, if applicable
1293          * Can't modify Req->argv[0] because we need it for RPL_ENDOFWHOWAS_MSG.
1294          */
1295         strlcpy(tok_buf, Req->argv[0], sizeof(tok_buf));
1296         nick = strtok(tok_buf, ",");
1297
1298         for (i=last, count=0; nick != NULL ; nick = strtok(NULL, ",")) {
1299                 nc = 0;
1300                 do {
1301                         /* Used entry? */
1302                         if (whowas[i].time > 0 && strcasecmp(nick, whowas[i].id) == 0) {
1303                                 if (!WHOWAS_EntryWrite(prefix, &whowas[i]))
1304                                         return DISCONNECTED;
1305                                 nc++;
1306                                 count++;
1307                         }
1308                         /* previous entry */
1309                         i--;
1310
1311                         /* "underflow", wrap around */
1312                         if (i < 0)
1313                                 i = MAX_WHOWAS - 1;
1314
1315                         if (nc && count >= max)
1316                                 break;
1317                 } while (i != last);
1318
1319                 if (nc == 0 && !IRC_WriteStrClient(prefix, ERR_WASNOSUCHNICK_MSG,
1320                                                 Client_ID(prefix), nick))
1321                         return DISCONNECTED;
1322         }
1323         return IRC_WriteStrClient(prefix, RPL_ENDOFWHOWAS_MSG, Client_ID(prefix), Req->argv[0]);
1324 } /* IRC_WHOWAS */
1325
1326
1327 /**
1328  * Send LUSERS reply to a client.
1329  *
1330  * @param Client The receipient of the information.
1331  * @return CONNECTED or DISCONNECTED.
1332  */
1333 GLOBAL bool
1334 IRC_Send_LUSERS(CLIENT *Client)
1335 {
1336         unsigned long cnt;
1337 #ifndef STRICT_RFC
1338         unsigned long max;
1339 #endif
1340
1341         assert(Client != NULL);
1342
1343         /* Users, services and serevers in the network */
1344         if (!IRC_WriteStrClient(Client, RPL_LUSERCLIENT_MSG, Client_ID(Client),
1345                                 Client_UserCount(), Client_ServiceCount(),
1346                                 Client_ServerCount()))
1347                 return DISCONNECTED;
1348
1349         /* Number of IRC operators */
1350         cnt = Client_OperCount( );
1351         if (cnt > 0) {
1352                 if (!IRC_WriteStrClient(Client, RPL_LUSEROP_MSG,
1353                                         Client_ID(Client), cnt))
1354                         return DISCONNECTED;
1355         }
1356
1357         /* Unknown connections */
1358         cnt = Client_UnknownCount( );
1359         if (cnt > 0) {
1360                 if (!IRC_WriteStrClient(Client, RPL_LUSERUNKNOWN_MSG,
1361                                         Client_ID(Client), cnt))
1362                         return DISCONNECTED;
1363         }
1364
1365         /* Number of created channels */
1366         if (!IRC_WriteStrClient(Client, RPL_LUSERCHANNELS_MSG,
1367                                 Client_ID(Client),
1368                                 Channel_CountVisible(Client)))
1369                 return DISCONNECTED;
1370
1371         /* Number of local users, services and servers */
1372         if (!IRC_WriteStrClient(Client, RPL_LUSERME_MSG, Client_ID(Client),
1373                                 Client_MyUserCount(), Client_MyServiceCount(),
1374                                 Client_MyServerCount()))
1375                 return DISCONNECTED;
1376
1377 #ifndef STRICT_RFC
1378         /* Maximum number of local users */
1379         cnt = Client_MyUserCount();
1380         max = Client_MyMaxUserCount();
1381         if (! IRC_WriteStrClient(Client, RPL_LOCALUSERS_MSG, Client_ID(Client),
1382                         cnt, max, cnt, max))
1383                 return DISCONNECTED;
1384         /* Maximum number of users in the network */
1385         cnt = Client_UserCount();
1386         max = Client_MaxUserCount();
1387         if(! IRC_WriteStrClient(Client, RPL_NETUSERS_MSG, Client_ID(Client),
1388                         cnt, max, cnt, max))
1389                 return DISCONNECTED;
1390         /* Connection counters */
1391         if (! IRC_WriteStrClient(Client, RPL_STATSCONN_MSG, Client_ID(Client),
1392                         Conn_CountMax(), Conn_CountAccepted()))
1393                 return DISCONNECTED;
1394 #endif
1395
1396         return CONNECTED;
1397 } /* IRC_Send_LUSERS */
1398
1399
1400 static bool
1401 Show_MOTD_Start(CLIENT *Client)
1402 {
1403         return IRC_WriteStrClient(Client, RPL_MOTDSTART_MSG,
1404                 Client_ID( Client ), Client_ID( Client_ThisServer( )));
1405 }
1406
1407 static bool
1408 Show_MOTD_Sendline(CLIENT *Client, const char *msg)
1409 {
1410         return IRC_WriteStrClient(Client, RPL_MOTD_MSG, Client_ID( Client ), msg);
1411 }
1412
1413 static bool
1414 Show_MOTD_End(CLIENT *Client)
1415 {
1416         return IRC_WriteStrClient( Client, RPL_ENDOFMOTD_MSG, Client_ID( Client ));
1417 }
1418
1419 #ifdef SSL_SUPPORT
1420 static bool Show_MOTD_SSLInfo(CLIENT *Client)
1421 {
1422         bool ret = true;
1423         char buf[COMMAND_LEN] = "Connected using Cipher ";
1424
1425         if (!Conn_GetCipherInfo(Client_Conn(Client), buf + 23, sizeof buf - 23))
1426                 return true;
1427
1428         if (!Show_MOTD_Sendline(Client, buf))
1429                 ret = false;
1430
1431         return ret;
1432 }
1433 #else
1434 static inline bool
1435 Show_MOTD_SSLInfo(UNUSED CLIENT *c)
1436 { return true; }
1437 #endif
1438
1439 GLOBAL bool
1440 IRC_Show_MOTD( CLIENT *Client )
1441 {
1442         const char *line;
1443         size_t len_tot, len_str;
1444
1445         assert( Client != NULL );
1446
1447         len_tot = array_bytes(&Conf_Motd);
1448         if (len_tot == 0 && !Conn_UsesSSL(Client_Conn(Client)))
1449                 return IRC_WriteStrClient(Client, ERR_NOMOTD_MSG, Client_ID(Client));
1450
1451         if (!Show_MOTD_Start(Client))
1452                 return DISCONNECTED;
1453
1454         line = array_start(&Conf_Motd);
1455         while (len_tot > 0) {
1456                 len_str = strlen(line) + 1;
1457
1458                 assert(len_tot >= len_str);
1459                 len_tot -= len_str;
1460
1461                 if (!Show_MOTD_Sendline(Client, line))
1462                         return DISCONNECTED;
1463                 line += len_str;
1464         }
1465
1466         if (!Show_MOTD_SSLInfo(Client))
1467                 return DISCONNECTED;
1468         return Show_MOTD_End(Client);
1469 } /* IRC_Show_MOTD */
1470
1471
1472 GLOBAL bool
1473 IRC_Send_NAMES( CLIENT *Client, CHANNEL *Chan )
1474 {
1475         bool is_visible, is_member;
1476         char str[LINE_LEN + 1];
1477         CL2CHAN *cl2chan;
1478         CLIENT *cl;
1479
1480         assert( Client != NULL );
1481         assert( Chan != NULL );
1482
1483         if( Channel_IsMemberOf( Chan, Client )) is_member = true;
1484         else is_member = false;
1485
1486         /* Do not print info on channel memberships to anyone that is not member? */
1487         if (Conf_MorePrivacy && !is_member)
1488                 return CONNECTED;
1489
1490         /* Secret channel? */
1491         if( ! is_member && strchr( Channel_Modes( Chan ), 's' )) return CONNECTED;
1492
1493         /* Alle Mitglieder suchen */
1494         snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1495         cl2chan = Channel_FirstMember( Chan );
1496         while( cl2chan )
1497         {
1498                 cl = Channel_GetClient( cl2chan );
1499
1500                 if( strchr( Client_Modes( cl ), 'i' )) is_visible = false;
1501                 else is_visible = true;
1502
1503                 if( is_member || is_visible )
1504                 {
1505                         /* Nick anhaengen */
1506                         if( str[strlen( str ) - 1] != ':' ) strlcat( str, " ", sizeof( str ));
1507                         if( strchr( Channel_UserModes( Chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
1508                         else if( strchr( Channel_UserModes( Chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
1509                         strlcat( str, Client_ID( cl ), sizeof( str ));
1510
1511                         if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
1512                         {
1513                                 /* Zeile wird zu lang: senden! */
1514                                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1515                                 snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1516                         }
1517                 }
1518
1519                 /* naechstes Mitglied suchen */
1520                 cl2chan = Channel_NextMember( Chan, cl2chan );
1521         }
1522         if( str[strlen( str ) - 1] != ':')
1523         {
1524                 /* Es sind noch Daten da, die gesendet werden muessen */
1525                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1526         }
1527
1528         return CONNECTED;
1529 } /* IRC_Send_NAMES */
1530
1531
1532 /**
1533  * Send the ISUPPORT numeric (005).
1534  * This numeric indicates the features that are supported by this server.
1535  * See <http://www.irc.org/tech_docs/005.html> for details.
1536  */
1537 GLOBAL bool
1538 IRC_Send_ISUPPORT(CLIENT * Client)
1539 {
1540         if (!IRC_WriteStrClient(Client, RPL_ISUPPORT1_MSG, Client_ID(Client),
1541                                 Conf_MaxJoins))
1542                 return DISCONNECTED;
1543         return IRC_WriteStrClient(Client, RPL_ISUPPORT2_MSG, Client_ID(Client),
1544                                   CHANNEL_NAME_LEN - 1, Conf_MaxNickLength - 1,
1545                                   COMMAND_LEN - 23, CLIENT_AWAY_LEN - 1,
1546                                   COMMAND_LEN - 113);
1547 } /* IRC_Send_ISUPPORT */
1548
1549
1550 /* -eof- */