src/ngircd/irc-info.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2012 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.h"
  41 #include "irc-write.h"
  42
  43 #include "exp.h"
  44 #include "irc-info.h"
  45
  46
  47 GLOBAL bool
  48 IRC_ADMIN(CLIENT *Client, REQUEST *Req )
  49 {
  50         CLIENT *target, *prefix;
  51
  52         assert( Client != NULL );
  53         assert( Req != NULL );
  54
  55         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  56
  57         /* find target ... */
  58         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
  59         else target = Client_ThisServer( );
  60
  61         /* find Prefix */
  62         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
  63         else prefix = Client;
  64         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  65
  66         /* forwad message to another server? */
  67         if( target != Client_ThisServer( ))
  68         {
  69                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
  70
  71                 /* forward */
  72                 IRC_WriteStrClientPrefix( target, prefix, "ADMIN %s", Req->argv[0] );
  73                 return CONNECTED;
  74         }
  75
  76         /* mit Versionsinfo antworten */
  77         if( ! IRC_WriteStrClient( Client, RPL_ADMINME_MSG, Client_ID( prefix ), Conf_ServerName )) return DISCONNECTED;
  78         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC1_MSG, Client_ID( prefix ), Conf_ServerAdmin1 )) return DISCONNECTED;
  79         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC2_MSG, Client_ID( prefix ), Conf_ServerAdmin2 )) return DISCONNECTED;
  80         if( ! IRC_WriteStrClient( Client, RPL_ADMINEMAIL_MSG, Client_ID( prefix ), Conf_ServerAdminMail )) return DISCONNECTED;
  81
  82         IRC_SetPenalty( Client, 1 );
  83         return CONNECTED;
  84 } /* IRC_ADMIN */
  85
  86
  87 /**
  88  * Handler for the IRC command "INFO".
  89  * See RFC 2812 section 3.4.10.
  90  */
  91 GLOBAL bool
  92 IRC_INFO(CLIENT * Client, REQUEST * Req)
  93 {
  94         CLIENT *target, *prefix;
  95         char msg[510];
  96
  97         assert(Client != NULL);
  98         assert(Req != NULL);
  99
 100         /* Wrong number of parameters? */
 101         if (Req->argc > 1)
 102                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 103                                           Client_ID(Client), Req->command);
 104
 105         /* Determine prefix */
 106         if (Client_Type(Client) == CLIENT_SERVER)
 107                 prefix = Client_Search(Req->prefix);
 108         else
 109                 prefix = Client;
 110         if (!prefix)
 111                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 112                                           Client_ID(Client), Req->prefix);
 113
 114         /* Look for a target */
 115         if (Req->argc > 0)
 116                 target = Client_Search(Req->argv[0]);
 117         else
 118                 target = Client_ThisServer();
 119
 120         /* Make sure that the target is a server */
 121         if (target && Client_Type(target) != CLIENT_SERVER)
 122                 target = Client_Introducer(target);
 123
 124         if (!target)
 125                 return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
 126                                           Client_ID(prefix), Req->argv[0]);
 127
 128         /* Pass on to another server? */
 129         if (target != Client_ThisServer()) {
 130                 IRC_WriteStrClientPrefix(target, prefix, "INFO %s",
 131                                          Req->argv[0]);
 132                 return CONNECTED;
 133         }
 134
 135         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix),
 136                                 NGIRCd_Version))
 137                 return DISCONNECTED;
 138
 139 #if defined(__DATE__) && defined(__TIME__)
 140         snprintf(msg, sizeof(msg), "Birth Date: %s at %s", __DATE__, __TIME__);
 141         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 142                 return DISCONNECTED;
 143 #endif
 144
 145         strlcpy(msg, "On-line since ", sizeof(msg));
 146         strlcat(msg, NGIRCd_StartStr, sizeof(msg));
 147         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 148                 return DISCONNECTED;
 149
 150         if (!IRC_WriteStrClient(Client, RPL_ENDOFINFO_MSG, Client_ID(prefix)))
 151                 return DISCONNECTED;
 152
 153         IRC_SetPenalty(Client, 2);
 154         return CONNECTED;
 155 } /* IRC_INFO */
 156
 157
 158 /**
 159  * Handler for the IRC "ISON" command.
 160  *
 161  * See RFC 2812, 4.9 "Ison message".
 162  *
 163  * @param Client The client from which this command has been received.
 164  * @param Req Request structure with prefix and all parameters.
 165  * @return CONNECTED or DISCONNECTED.
 166  */
 167 GLOBAL bool
 168 IRC_ISON( CLIENT *Client, REQUEST *Req )
 169 {
 170         char rpl[COMMAND_LEN];
 171         CLIENT *c;
 172         char *ptr;
 173         int i;
 174
 175         assert(Client != NULL);
 176         assert(Req != NULL);
 177
 178         /* Bad number of arguments? */
 179         if (Req->argc < 1)
 180                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 181                                           Client_ID(Client), Req->command);
 182
 183         strlcpy(rpl, RPL_ISON_MSG, sizeof rpl);
 184         for (i = 0; i < Req->argc; i++) {
 185                 /* "All" ircd even parse ":<x> <y> ..." arguments and split
 186                  * them up; so we do the same ... */
 187                 ptr = strtok(Req->argv[i], " ");
 188                 while (ptr) {
 189                         ngt_TrimStr(ptr);
 190                         c = Client_Search(ptr);
 191                         if (c && Client_Type(c) == CLIENT_USER) {
 192                                 strlcat(rpl, Client_ID(c), sizeof(rpl));
 193                                 strlcat(rpl, " ", sizeof(rpl));
 194                         }
 195                         ptr = strtok(NULL, " ");
 196                 }
 197         }
 198         ngt_TrimLastChr(rpl, ' ');
 199
 200         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 201 } /* IRC_ISON */
 202
 203
 204 /**
 205  * Handler for the IRC "LINKS" command.
 206  *
 207  * See RFC 2812, 3.4.5 "Links message".
 208  *
 209  * @param Client The client from which this command has been received.
 210  * @param Req Request structure with prefix and all parameters.
 211  * @return CONNECTED or DISCONNECTED.
 212  */
 213 GLOBAL bool
 214 IRC_LINKS(CLIENT *Client, REQUEST *Req)
 215 {
 216         CLIENT *target, *from, *c;
 217         char *mask;
 218
 219         assert(Client != NULL);
 220         assert(Req != NULL);
 221
 222         IRC_SetPenalty(Client, 1);
 223
 224         if (Req->argc > 2)
 225                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 226                                           Client_ID(Client), Req->command);
 227
 228         /* Get pointer to server mask or "*", if none given */
 229         if (Req->argc > 0)
 230                 mask = Req->argv[Req->argc - 1];
 231         else
 232                 mask = "*";
 233
 234         if (Client_Type(Client) == CLIENT_SERVER)
 235                 from = Client_Search(Req->prefix);
 236         else
 237                 from = Client;
 238         if (!from)
 239                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 240                                           Client_ID(Client), Req->prefix);
 241
 242         /* Forward? */
 243         if (Req->argc == 2) {
 244                 target = Client_Search(Req->argv[0]);
 245                 if (! target || Client_Type(target) != CLIENT_SERVER)
 246                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 247                                                   Client_ID(from),
 248                                                   Req->argv[0] );
 249                 else
 250                         if (target != Client_ThisServer())
 251                                 return IRC_WriteStrClientPrefix(target, from,
 252                                                 "LINKS %s %s", Req->argv[0],
 253                                                 Req->argv[1]);
 254         }
 255
 256         c = Client_First();
 257         while (c) {
 258                 if (Client_Type(c) == CLIENT_SERVER
 259                     && MatchCaseInsensitive(mask, Client_ID(c))) {
 260                         if (!IRC_WriteStrClient(from, RPL_LINKS_MSG,
 261                                         Client_ID(from), Client_ID(c),
 262                                         Client_ID(Client_TopServer(c)
 263                                                   ? Client_TopServer(c)
 264                                                   : Client_ThisServer()),
 265                                         Client_Hops(c), Client_Info(c)))
 266                                 return DISCONNECTED;
 267                 }
 268                 c = Client_Next(c);
 269         }
 270         return IRC_WriteStrClient(from, RPL_ENDOFLINKS_MSG,
 271                                   Client_ID(from), mask);
 272 } /* IRC_LINKS */
 273
 274
 275 GLOBAL bool
 276 IRC_LUSERS( CLIENT *Client, REQUEST *Req )
 277 {
 278         CLIENT *target, *from;
 279
 280         assert( Client != NULL );
 281         assert( Req != NULL );
 282
 283         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 284
 285         /* Absender ermitteln */
 286         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 287         else from = Client;
 288         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 289
 290         /* An anderen Server forwarden? */
 291         if( Req->argc == 2 )
 292         {
 293                 target = Client_Search( Req->argv[1] );
 294                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 295                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LUSERS %s %s", Req->argv[0], Req->argv[1] );
 296         }
 297
 298         /* Wer ist der Absender? */
 299         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 300         else target = Client;
 301         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 302
 303         IRC_Send_LUSERS( target );
 304
 305         IRC_SetPenalty( target, 1 );
 306         return CONNECTED;
 307 } /* IRC_LUSERS */
 308
 309
 310 /**
 311  * Handler for the IRC command "SERVLIST".
 312  * List registered services, see RFC 2811, section 3.5.1: the syntax is
 313  * "SERVLIST [<mask> [<type>]]".
 314  */
 315 GLOBAL bool
 316 IRC_SERVLIST(CLIENT *Client, REQUEST *Req)
 317 {
 318         CLIENT *c;
 319
 320         assert(Client != NULL);
 321         assert(Req != NULL);
 322
 323         if (Req->argc > 2)
 324                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 325                                           Client_ID(Client), Req->command);
 326
 327         if (Req->argc < 2 || strcmp(Req->argv[1], "0") == 0) {
 328                 for (c = Client_First(); c!= NULL; c = Client_Next(c)) {
 329                         if (Client_Type(c) != CLIENT_SERVICE)
 330                                 continue;
 331                         if (Req->argc > 0 && !MatchCaseInsensitive(Req->argv[0],
 332                                                                   Client_ID(c)))
 333                                 continue;
 334                         if (!IRC_WriteStrClient(Client, RPL_SERVLIST_MSG,
 335                                         Client_ID(Client), Client_Mask(c),
 336                                         Client_Mask(Client_Introducer(c)), "*",
 337                                         0, Client_Hops(c), Client_Info(c)))
 338                                 return DISCONNECTED;
 339                 }
 340         }
 341
 342         return IRC_WriteStrClient(Client, RPL_SERVLISTEND_MSG, Client_ID(Client),
 343                                   Req->argc > 0 ? Req->argv[0] : "*",
 344                                   Req->argc > 1 ? Req->argv[1] : "0");
 345 } /* IRC_SERVLIST */
 346
 347
 348 GLOBAL bool
 349 IRC_MOTD( CLIENT *Client, REQUEST *Req )
 350 {
 351         CLIENT *from, *target;
 352
 353         assert( Client != NULL );
 354         assert( Req != NULL );
 355
 356         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 357
 358         /* From aus Prefix ermitteln */
 359         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 360         else from = Client;
 361         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 362
 363         if( Req->argc == 1 )
 364         {
 365                 /* forward? */
 366                 target = Client_Search( Req->argv[0] );
 367                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 368
 369                 if( target != Client_ThisServer( ))
 370                 {
 371                         /* Ok, anderer Server ist das Ziel: forwarden */
 372                         return IRC_WriteStrClientPrefix( target, from, "MOTD %s", Req->argv[0] );
 373                 }
 374         }
 375
 376         IRC_SetPenalty( from, 3 );
 377         return IRC_Show_MOTD( from );
 378 } /* IRC_MOTD */
 379
 380
 381 GLOBAL bool
 382 IRC_NAMES( CLIENT *Client, REQUEST *Req )
 383 {
 384         char rpl[COMMAND_LEN], *ptr;
 385         CLIENT *target, *from, *c;
 386         CHANNEL *chan;
 387
 388         assert( Client != NULL );
 389         assert( Req != NULL );
 390
 391         if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 392
 393         /* use prefix to determine "From" */
 394         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 395         else from = Client;
 396         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 397
 398         if( Req->argc == 2 )
 399         {
 400                 /* forward to another server? */
 401                 target = Client_Search( Req->argv[1] );
 402                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 403
 404                 if( target != Client_ThisServer( )) {
 405                         /* target is another server, forward */
 406                         return IRC_WriteStrClientPrefix( target, from, "NAMES %s :%s", Req->argv[0], Req->argv[1] );
 407                 }
 408         }
 409
 410         if( Req->argc > 0 )
 411         {
 412                 /* bestimmte Channels durchgehen */
 413                 ptr = strtok( Req->argv[0], "," );
 414                 while( ptr )
 415                 {
 416                         chan = Channel_Search( ptr );
 417                         if( chan )
 418                         {
 419                                 /* print name */
 420                                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 421                         }
 422                         if( ! IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), ptr )) return DISCONNECTED;
 423
 424                         /* get next channel name */
 425                         ptr = strtok( NULL, "," );
 426                 }
 427                 return CONNECTED;
 428         }
 429
 430         chan = Channel_First( );
 431         while( chan )
 432         {
 433                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 434
 435                 chan = Channel_Next( chan );
 436         }
 437
 438         /* Now print all clients which are not in any channel */
 439         c = Client_First( );
 440         snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 441         while( c )
 442         {
 443                 if(( Client_Type( c ) == CLIENT_USER ) && ( Channel_FirstChannelOf( c ) == NULL ) && ( ! strchr( Client_Modes( c ), 'i' )))
 444                 {
 445                         /* its a user, concatenate ... */
 446                         if( rpl[strlen( rpl ) - 1] != ':' ) strlcat( rpl, " ", sizeof( rpl ));
 447                         strlcat( rpl, Client_ID( c ), sizeof( rpl ));
 448
 449                         if( strlen( rpl ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
 450                         {
 451                                 /* Line is gwoing too long, send now */
 452                                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 453                                 snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 454                         }
 455                 }
 456
 457                 c = Client_Next( c );
 458         }
 459         if( rpl[strlen( rpl ) - 1] != ':')
 460         {
 461                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 462         }
 463
 464         IRC_SetPenalty( from, 1 );
 465         return IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), "*" );
 466 } /* IRC_NAMES */
 467
 468
 469 static unsigned int
 470 t_diff(time_t *t, const time_t d)
 471 {
 472         time_t diff, remain;
 473
 474         diff = *t / d;
 475         remain = diff * d;
 476         *t -= remain;
 477
 478         return (unsigned int)diff;
 479 }
 480
 481
 482 static unsigned int
 483 uptime_days(time_t *now)
 484 {
 485         return t_diff(now, 60 * 60 * 24);
 486 }
 487
 488
 489 static unsigned int
 490 uptime_hrs(time_t *now)
 491 {
 492         return t_diff(now, 60 * 60);
 493 }
 494
 495
 496 static unsigned int
 497 uptime_mins(time_t *now)
 498 {
 499          return t_diff(now, 60);
 500 }
 501
 502
 503 /**
 504  * Handler for the IRC command "STATS".
 505  * See RFC 2812 section 3.4.4.
 506  */
 507 GLOBAL bool
 508 IRC_STATS( CLIENT *Client, REQUEST *Req )
 509 {
 510         CLIENT *from, *target, *cl;
 511         CONN_ID con;
 512         char query;
 513         COMMAND *cmd;
 514         time_t time_now;
 515         unsigned int days, hrs, mins;
 516         struct list_head *list;
 517         struct list_elem *list_item;
 518
 519         assert(Client != NULL);
 520         assert(Req != NULL);
 521
 522         if (Req->argc > 2)
 523                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 524                                           Client_ID(Client), Req->command);
 525
 526         /* use prefix to determine "From" */
 527         if (Client_Type(Client) == CLIENT_SERVER)
 528                 from = Client_Search(Req->prefix);
 529         else
 530                 from = Client;
 531
 532         if (!from)
 533                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 534                                           Client_ID(Client), Req->prefix);
 535
 536         if (Req->argc == 2) {
 537                 /* forward to another server? */
 538                 target = Client_Search(Req->argv[1]);
 539                 if ((!target) || (Client_Type(target) != CLIENT_SERVER))
 540                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 541                                                  Client_ID(from), Req->argv[1]);
 542
 543                 if (target != Client_ThisServer()) {
 544                         /* forward to another server */
 545                         return IRC_WriteStrClientPrefix(target, from,
 546                                      "STATS %s %s", Req->argv[0], Req->argv[1]);
 547                 }
 548         }
 549
 550         if (Req->argc > 0)
 551                 query = Req->argv[0][0] ? Req->argv[0][0] : '*';
 552         else
 553                 query = '*';
 554
 555         switch (query) {
 556         case 'g':       /* Network-wide bans ("G-Lines") */
 557         case 'G':
 558         case 'k':       /* Server-local bans ("K-Lines") */
 559         case 'K':
 560                 if (!Client_HasMode(from, 'o'))
 561                     return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
 562                                               Client_ID(from));
 563                 if (query == 'g' || query == 'G')
 564                         list = Class_GetList(CLASS_GLINE);
 565                 else
 566                         list = Class_GetList(CLASS_KLINE);
 567                         list_item = Lists_GetFirst(list);
 568                         while (list_item) {
 569                                 if (!IRC_WriteStrClient(from, RPL_STATSXLINE_MSG,
 570                                                 Client_ID(from), query,
 571                                                 Lists_GetMask(list_item),
 572                                                 Lists_GetValidity(list_item),
 573                                                 Lists_GetReason(list_item)))
 574                                         return DISCONNECTED;
 575                                 list_item = Lists_GetNext(list_item);
 576                         }
 577                 break;
 578         case 'l':       /* Link status (servers and own link) */
 579         case 'L':
 580                 time_now = time(NULL);
 581                 for (con = Conn_First(); con != NONE; con = Conn_Next(con)) {
 582                         cl = Conn_GetClient(con);
 583                         if (!cl)
 584                                 continue;
 585                         if ((Client_Type(cl) == CLIENT_SERVER)
 586                             || (cl == Client)) {
 587                                 /* Server link or our own connection */
 588 #ifdef ZLIB
 589                                 if (Conn_Options(con) & CONN_ZIP) {
 590                                         if (!IRC_WriteStrClient
 591                                             (from, RPL_STATSLINKINFOZIP_MSG,
 592                                              Client_ID(from), Client_Mask(cl),
 593                                              Conn_SendQ(con), Conn_SendMsg(con),
 594                                              Zip_SendBytes(con),
 595                                              Conn_SendBytes(con),
 596                                              Conn_RecvMsg(con),
 597                                              Zip_RecvBytes(con),
 598                                              Conn_RecvBytes(con),
 599                                              (long)(time_now - Conn_StartTime(con))))
 600                                                 return DISCONNECTED;
 601                                         continue;
 602                                 }
 603 #endif
 604                                 if (!IRC_WriteStrClient
 605                                     (from, RPL_STATSLINKINFO_MSG,
 606                                      Client_ID(from), Client_Mask(cl),
 607                                      Conn_SendQ(con), Conn_SendMsg(con),
 608                                      Conn_SendBytes(con), Conn_RecvMsg(con),
 609                                      Conn_RecvBytes(con),
 610                                      (long)(time_now - Conn_StartTime(con))))
 611                                         return DISCONNECTED;
 612                         }
 613                 }
 614                 break;
 615         case 'm':       /* IRC command status (usage count) */
 616         case 'M':
 617                 cmd = Parse_GetCommandStruct();
 618                 for (; cmd->name; cmd++) {
 619                         if (cmd->lcount == 0 && cmd->rcount == 0)
 620                                 continue;
 621                         if (!IRC_WriteStrClient
 622                             (from, RPL_STATSCOMMANDS_MSG, Client_ID(from),
 623                              cmd->name, cmd->lcount, cmd->bytes, cmd->rcount))
 624                                 return DISCONNECTED;
 625                 }
 626                 break;
 627         case 'u':       /* Server uptime */
 628         case 'U':
 629                 time_now = time(NULL) - NGIRCd_Start;
 630                 days = uptime_days(&time_now);
 631                 hrs = uptime_hrs(&time_now);
 632                 mins = uptime_mins(&time_now);
 633                 if (!IRC_WriteStrClient(from, RPL_STATSUPTIME, Client_ID(from),
 634                                        days, hrs, mins, (unsigned int)time_now))
 635                         return DISCONNECTED;
 636                 break;
 637         }
 638
 639         IRC_SetPenalty(from, 2);
 640         return IRC_WriteStrClient(from, RPL_ENDOFSTATS_MSG,
 641                                   Client_ID(from), query);
 642 } /* IRC_STATS */
 643
 644
 645 /**
 646  * Handler for the IRC command "SUMMON".
 647  * See RFC 2812 section 4.5. ngIRCd doesn't implement this functionality and
 648  * therefore answers with ERR_SUMMONDISABLED.
 649  */
 650 GLOBAL bool
 651 IRC_SUMMON(CLIENT * Client, REQUEST * Req)
 652 {
 653         return IRC_WriteStrClient(Client, ERR_SUMMONDISABLED_MSG,
 654                                   Client_ID(Client), Req->command);
 655 } /* IRC_SUMMON */
 656
 657
 658 GLOBAL bool
 659 IRC_TIME( CLIENT *Client, REQUEST *Req )
 660 {
 661         CLIENT *from, *target;
 662         char t_str[64];
 663         time_t t;
 664
 665         assert( Client != NULL );
 666         assert( Req != NULL );
 667
 668         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 669
 670         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 671         else from = Client;
 672         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 673
 674         if( Req->argc == 1 )
 675         {
 676                 target = Client_Search( Req->argv[0] );
 677                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[0] );
 678
 679                 if( target != Client_ThisServer( ))
 680                 {
 681                         return IRC_WriteStrClientPrefix( target, from, "TIME %s", Req->argv[0] );
 682                 }
 683         }
 684
 685         t = time( NULL );
 686         (void)strftime( t_str, 60, "%A %B %d %Y -- %H:%M %Z", localtime( &t ));
 687         return IRC_WriteStrClient( from, RPL_TIME_MSG, Client_ID( from ), Client_ID( Client_ThisServer( )), t_str );
 688 } /* IRC_TIME */
 689
 690
 691 /**
 692  * Handler for the IRC command "USERHOST".
 693  * See RFC 2812 section 4.8.
 694  */
 695 GLOBAL bool
 696 IRC_USERHOST(CLIENT *Client, REQUEST *Req)
 697 {
 698         char rpl[COMMAND_LEN];
 699         CLIENT *c;
 700         int max, i;
 701
 702         assert(Client != NULL);
 703         assert(Req != NULL);
 704
 705         if ((Req->argc < 1))
 706                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 707                                           Client_ID(Client), Req->command);
 708
 709         if (Req->argc > 5)
 710                 max = 5;
 711         else
 712                 max = Req->argc;
 713
 714         strlcpy(rpl, RPL_USERHOST_MSG, sizeof rpl);
 715         for (i = 0; i < max; i++) {
 716                 c = Client_Search(Req->argv[i]);
 717                 if (c && (Client_Type(c) == CLIENT_USER)) {
 718                         /* This Nick is "online" */
 719                         strlcat(rpl, Client_ID(c), sizeof(rpl));
 720                         if (Client_HasMode(c, 'o'))
 721                                 strlcat(rpl, "*", sizeof(rpl));
 722                         strlcat(rpl, "=", sizeof(rpl));
 723                         if (Client_HasMode(c, 'a'))
 724                                 strlcat(rpl, "-", sizeof(rpl));
 725                         else
 726                                 strlcat(rpl, "+", sizeof(rpl));
 727                         strlcat(rpl, Client_User(c), sizeof(rpl));
 728                         strlcat(rpl, "@", sizeof(rpl));
 729                         strlcat(rpl, Client_HostnameCloaked(c), sizeof(rpl));
 730                         strlcat(rpl, " ", sizeof(rpl));
 731                 }
 732         }
 733         ngt_TrimLastChr(rpl, ' ');
 734
 735         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 736 } /* IRC_USERHOST */
 737
 738
 739 /**
 740  * Handler for the IRC command "USERS".
 741  * See RFC 2812 section 4.6. As suggested there the command is disabled.
 742  */
 743 GLOBAL bool
 744 IRC_USERS(CLIENT * Client, REQUEST * Req)
 745 {
 746         return IRC_WriteStrClient(Client, ERR_USERSDISABLED_MSG,
 747                                   Client_ID(Client), Req->command);
 748 } /* IRC_USERS */
 749
 750
 751 GLOBAL bool
 752 IRC_VERSION( CLIENT *Client, REQUEST *Req )
 753 {
 754         CLIENT *target, *prefix;
 755
 756         assert( Client != NULL );
 757         assert( Req != NULL );
 758
 759         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 760
 761         /* Ziel suchen */
 762         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
 763         else target = Client_ThisServer( );
 764
 765         /* Prefix ermitteln */
 766         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
 767         else prefix = Client;
 768         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 769
 770         /* An anderen Server weiterleiten? */
 771         if( target != Client_ThisServer( ))
 772         {
 773                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
 774
 775                 /* forwarden */
 776                 IRC_WriteStrClientPrefix( target, prefix, "VERSION %s", Req->argv[0] );
 777                 return CONNECTED;
 778         }
 779
 780         /* send version information */
 781         IRC_SetPenalty(Client, 1);
 782         return IRC_WriteStrClient(Client, RPL_VERSION_MSG, Client_ID(prefix),
 783                                   PACKAGE_NAME, PACKAGE_VERSION,
 784                                   NGIRCd_DebugLevel, Conf_ServerName,
 785                                   NGIRCd_VersionAddition);
 786 } /* IRC_VERSION */
 787
 788
 789 static bool
 790 write_whoreply(CLIENT *Client, CLIENT *c, const char *channelname, const char *flags)
 791 {
 792         return IRC_WriteStrClient(Client, RPL_WHOREPLY_MSG, Client_ID(Client),
 793                                   channelname, Client_User(c),
 794                                   Client_HostnameCloaked(c),
 795                                   Client_ID(Client_Introducer(c)), Client_ID(c),
 796                                   flags, Client_Hops(c), Client_Info(c));
 797 }
 798
 799
 800 static const char *
 801 who_flags_status(const char *client_modes)
 802 {
 803         if (strchr(client_modes, 'a'))
 804                 return "G"; /* away */
 805         return "H";
 806 }
 807
 808
 809 static const char *
 810 who_flags_qualifier(const char *chan_user_modes)
 811 {
 812         if (strchr(chan_user_modes, 'o'))
 813                 return "@";
 814         else if (strchr(chan_user_modes, 'v'))
 815                 return "+";
 816         return "";
 817 }
 818
 819
 820 /**
 821  * Send WHO reply for a "channel target" ("WHO #channel").
 822  *
 823  * @param Client Client requesting the information.
 824  * @param Chan Channel being requested.
 825  * @param OnlyOps Only display IRC operators.
 826  * @return CONNECTED or DISCONNECTED.
 827  */
 828 static bool
 829 IRC_WHO_Channel(CLIENT *Client, CHANNEL *Chan, bool OnlyOps)
 830 {
 831         bool is_visible, is_member, is_ircop;
 832         CL2CHAN *cl2chan;
 833         const char *client_modes;
 834         const char *chan_user_modes;
 835         char flags[8];
 836         CLIENT *c;
 837         int count = 0;
 838
 839         assert( Client != NULL );
 840         assert( Chan != NULL );
 841
 842         is_member = Channel_IsMemberOf(Chan, Client);
 843
 844         /* Secret channel? */
 845         if (!is_member && strchr(Channel_Modes(Chan), 's'))
 846                 return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG,
 847                                           Client_ID(Client), Channel_Name(Chan));
 848
 849         cl2chan = Channel_FirstMember(Chan);
 850         for (; cl2chan ; cl2chan = Channel_NextMember(Chan, cl2chan)) {
 851                 c = Channel_GetClient(cl2chan);
 852
 853                 client_modes = Client_Modes(c);
 854                 is_ircop = strchr(client_modes, 'o') != NULL;
 855                 if (OnlyOps && !is_ircop)
 856                         continue;
 857
 858                 is_visible = strchr(client_modes, 'i') == NULL;
 859                 if (is_member || is_visible) {
 860                         if (IRC_CheckListTooBig(Client, count, MAX_RPL_WHO, "WHO"))
 861                                 break;
 862
 863                         strcpy(flags, who_flags_status(client_modes));
 864                         if (is_ircop)
 865                                 strlcat(flags, "*", sizeof(flags));
 866
 867                         chan_user_modes = Channel_UserModes(Chan, c);
 868                         strlcat(flags, who_flags_qualifier(chan_user_modes),
 869                                 sizeof(flags));
 870
 871                         if (!write_whoreply(Client, c, Channel_Name(Chan),
 872                                             flags))
 873                                 return DISCONNECTED;
 874                         count++;
 875                 }
 876         }
 877         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 878                                   Channel_Name(Chan));
 879 }
 880
 881
 882 /**
 883  * Send WHO reply for a "mask target" ("WHO m*sk").
 884  *
 885  * @param Client Client requesting the information.
 886  * @param Mask Mask being requested or NULL for "all" clients.
 887  * @param OnlyOps Only display IRC operators.
 888  * @return CONNECTED or DISCONNECTED.
 889  */
 890 static bool
 891 IRC_WHO_Mask(CLIENT *Client, char *Mask, bool OnlyOps)
 892 {
 893         CLIENT *c;
 894         CL2CHAN *cl2chan;
 895         CHANNEL *chan;
 896         bool client_match, is_visible;
 897         char flags[4];
 898         int count = 0;
 899
 900         assert (Client != NULL);
 901
 902         if (Mask)
 903                 ngt_LowerStr(Mask);
 904
 905         for (c = Client_First(); c != NULL; c = Client_Next(c)) {
 906                 if (Client_Type(c) != CLIENT_USER)
 907                         continue;
 908
 909                 if (OnlyOps && !Client_HasMode(c, 'o'))
 910                         continue;
 911
 912                 if (Mask) {
 913                         /* Match pattern against user host/server/name/nick */
 914                         client_match = MatchCaseInsensitive(Mask,
 915                                                 Client_Hostname(c));
 916                         if (!client_match)
 917                                 client_match = MatchCaseInsensitive(Mask,
 918                                                 Client_ID(Client_Introducer(c)));
 919                         if (!client_match)
 920                                 client_match = MatchCaseInsensitive(Mask,
 921                                                 Client_Info(c));
 922                         if (!client_match)
 923                                 client_match = MatchCaseInsensitive(Mask,
 924                                                 Client_ID(c));
 925                         if (!client_match)
 926                                 continue;       /* no match: skip this client */
 927                 }
 928
 929                 is_visible = !Client_HasMode(c, 'i');
 930
 931                 /* Target client is invisible, but mask matches exactly? */
 932                 if (!is_visible && Mask && strcasecmp(Client_ID(c), Mask) == 0)
 933                         is_visible = true;
 934
 935                 /* Target still invisible, but are both on the same channel? */
 936                 if (!is_visible) {
 937                         cl2chan = Channel_FirstChannelOf(Client);
 938                         while (cl2chan && !is_visible) {
 939                                 chan = Channel_GetChannel(cl2chan);
 940                                 if (Channel_IsMemberOf(chan, c))
 941                                         is_visible = true;
 942                                 cl2chan = Channel_NextChannelOf(Client, cl2chan);
 943                         }
 944                 }
 945
 946                 if (!is_visible)        /* target user is not visible */
 947                         continue;
 948
 949                 if (IRC_CheckListTooBig(Client, count, MAX_RPL_WHO, "WHO"))
 950                         break;
 951
 952                 strcpy(flags, who_flags_status(Client_Modes(c)));
 953                 if (strchr(Client_Modes(c), 'o'))
 954                         strlcat(flags, "*", sizeof(flags));
 955
 956                 if (!write_whoreply(Client, c, "*", flags))
 957                         return DISCONNECTED;
 958                 count++;
 959         }
 960
 961         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 962                                   Mask ? Mask : "*");
 963 }
 964
 965
 966 /**
 967  * Handler for the IRC "WHO" command.
 968  *
 969  * See RFC 2812, 3.6.1 "Who query".
 970  *
 971  * @param Client The client from which this command has been received.
 972  * @param Req Request structure with prefix and all parameters.
 973  * @return CONNECTED or DISCONNECTED.
 974  */
 975 GLOBAL bool
 976 IRC_WHO(CLIENT *Client, REQUEST *Req)
 977 {
 978         bool only_ops;
 979         CHANNEL *chan;
 980
 981         assert (Client != NULL);
 982         assert (Req != NULL);
 983
 984         if (Req->argc > 2)
 985                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 986                                           Client_ID(Client), Req->command);
 987
 988         only_ops = false;
 989
 990         if (Req->argc == 2) {
 991                 if (strcmp(Req->argv[1], "o") == 0)
 992                         only_ops = true;
 993 #ifdef STRICT_RFC
 994                 else
 995                         return IRC_WriteStrClient(Client,
 996                                                   ERR_NEEDMOREPARAMS_MSG,
 997                                                   Client_ID(Client),
 998                                                   Req->command);
 999 #endif
1000         }
1001
1002         IRC_SetPenalty(Client, 1);
1003         if (Req->argc >= 1) {
1004                 /* Channel or mask given */
1005                 chan = Channel_Search(Req->argv[0]);
1006                 if (chan) {
1007                         /* Members of a channel have been requested */
1008                         IRC_SetPenalty(Client, 1);
1009                         return IRC_WHO_Channel(Client, chan, only_ops);
1010                 }
1011                 if (strcmp(Req->argv[0], "0") != 0) {
1012                         /* A mask has been given. But please note this RFC
1013                          * stupidity: "0" is same as no arguments ... */
1014                         IRC_SetPenalty(Client, 3);
1015                         return IRC_WHO_Mask(Client, Req->argv[0], only_ops);
1016                 }
1017         }
1018
1019         /* No channel or (valid) mask given */
1020         IRC_SetPenalty(Client, 2);
1021         return IRC_WHO_Mask(Client, NULL, only_ops);
1022 } /* IRC_WHO */
1023
1024
1025 /**
1026  * Generate WHOIS reply of one actual client.
1027  *
1028  * @param Client        The client from which this command has been received.
1029  * @param from          The client requesting the information ("originator").
1030  * @param c             The client of which information should be returned.
1031  * @returns             CONNECTED or DISCONNECTED.
1032  */
1033 static bool
1034 IRC_WHOIS_SendReply(CLIENT *Client, CLIENT *from, CLIENT *c)
1035 {
1036         char str[LINE_LEN + 1];
1037         CL2CHAN *cl2chan;
1038         CHANNEL *chan;
1039
1040         /* Nick, user, hostname and client info */
1041         if (!IRC_WriteStrClient(from, RPL_WHOISUSER_MSG, Client_ID(from),
1042                                 Client_ID(c), Client_User(c),
1043                                 Client_HostnameCloaked(c), Client_Info(c)))
1044                 return DISCONNECTED;
1045
1046         /* Server */
1047         if (!IRC_WriteStrClient(from, RPL_WHOISSERVER_MSG, Client_ID(from),
1048                                 Client_ID(c), Client_ID(Client_Introducer(c)),
1049                                 Client_Info(Client_Introducer(c))))
1050                 return DISCONNECTED;
1051
1052         /* Channels */
1053         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1054                  Client_ID(from), Client_ID(c));
1055         cl2chan = Channel_FirstChannelOf(c);
1056         while (cl2chan) {
1057                 chan = Channel_GetChannel(cl2chan);
1058                 assert(chan != NULL);
1059
1060                 /* next */
1061                 cl2chan = Channel_NextChannelOf(c, cl2chan);
1062
1063                 /* Secret channel? */
1064                 if (strchr(Channel_Modes(chan), 's')
1065                     && !Channel_IsMemberOf(chan, Client))
1066                         continue;
1067
1068                 /* Local channel and request is not from a user? */
1069                 if (Client_Type(Client) == CLIENT_SERVER
1070                     && Channel_IsLocal(chan))
1071                         continue;
1072
1073                 /* Concatenate channel names */
1074                 if (str[strlen(str) - 1] != ':')
1075                         strlcat(str, " ", sizeof(str));
1076
1077                 strlcat(str, who_flags_qualifier(Channel_UserModes(chan, c)),
1078                                                  sizeof(str));
1079                 strlcat(str, Channel_Name(chan), sizeof(str));
1080
1081                 if (strlen(str) > (LINE_LEN - CHANNEL_NAME_LEN - 4)) {
1082                         /* Line becomes too long: send it! */
1083                         if (!IRC_WriteStrClient(Client, "%s", str))
1084                                 return DISCONNECTED;
1085                         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1086                                  Client_ID(from), Client_ID(c));
1087                 }
1088         }
1089         if(str[strlen(str) - 1] != ':') {
1090                 /* There is data left to send: */
1091                 if (!IRC_WriteStrClient(Client, "%s", str))
1092                         return DISCONNECTED;
1093         }
1094
1095         /* IRC-Operator? */
1096         if (Client_HasMode(c, 'o') &&
1097                 !IRC_WriteStrClient(from, RPL_WHOISOPERATOR_MSG,
1098                                     Client_ID(from), Client_ID(c)))
1099                         return DISCONNECTED;
1100
1101         /* Connected using SSL? */
1102         if (Conn_UsesSSL(Client_Conn(c)) &&
1103                 !IRC_WriteStrClient(from, RPL_WHOISSSL_MSG,
1104                                     Client_ID(from), Client_ID(c)))
1105                         return DISCONNECTED;
1106
1107         /* Idle and signon time (local clients only!) */
1108         if (!Conf_MorePrivacy && Client_Conn(c) > NONE &&
1109                 !IRC_WriteStrClient(from, RPL_WHOISIDLE_MSG,
1110                                     Client_ID(from), Client_ID(c),
1111                                     (unsigned long)Conn_GetIdle(Client_Conn(c)),
1112                                     (unsigned long)Conn_GetSignon(Client_Conn(c))))
1113                         return DISCONNECTED;
1114
1115         /* Away? */
1116         if (Client_HasMode(c, 'a') &&
1117                 !IRC_WriteStrClient(from, RPL_AWAY_MSG,
1118                                     Client_ID(from), Client_ID(c),
1119                                     Client_Away(c)))
1120                         return DISCONNECTED;
1121
1122         return CONNECTED;
1123 } /* IRC_WHOIS_SendReply */
1124
1125
1126 /**
1127  * Handler for the IRC "WHOIS" command.
1128  *
1129  * See RFC 2812, 3.6.2 "Whois query".
1130  *
1131  * @param Client        The client from which this command has been received.
1132  * @param Req           Request structure with prefix and all parameters.
1133  * @return              CONNECTED or DISCONNECTED.
1134  */
1135 GLOBAL bool
1136 IRC_WHOIS( CLIENT *Client, REQUEST *Req )
1137 {
1138         CLIENT *from, *target, *c;
1139         unsigned int match_count = 0, found = 0;
1140         bool has_wildcards, is_remote;
1141         bool got_wildcard = false;
1142         char mask[COMMAND_LEN], *query;
1143
1144         assert( Client != NULL );
1145         assert( Req != NULL );
1146
1147         /* Bad number of parameters? */
1148         if (Req->argc < 1 || Req->argc > 2)
1149                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1150                                           Client_ID(Client), Req->command);
1151
1152         /* Search sender of the WHOIS */
1153         if (Client_Type(Client) == CLIENT_SERVER) {
1154                 from = Client_Search(Req->prefix);
1155         } else {
1156                 IRC_SetPenalty(Client, 1);
1157                 from = Client;
1158         }
1159         if (!from)
1160                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1161                                           Client_ID(Client), Req->prefix);
1162
1163         /* Get target server for this command */
1164         if (Req->argc > 1) {
1165                 /* Search the target server, which can be specified as a
1166                  * nick name on that server as well: */
1167                 target = Client_Search(Req->argv[0]);
1168                 if (!target)
1169                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
1170                                                 Client_ID(from), Req->argv[0]);
1171         } else
1172                 target = Client_ThisServer();
1173         assert(target != NULL);
1174
1175         /* Forward to other server? */
1176         if (Client_NextHop(target) != Client_ThisServer() &&
1177             Client_Type(Client_NextHop(target)) == CLIENT_SERVER)
1178                 return IRC_WriteStrClientPrefix(target, from,
1179                                                 "WHOIS %s :%s",
1180                                                 Req->argv[0], Req->argv[1]);
1181
1182         is_remote = Client_Conn(from) < 0;
1183         strlcpy(mask, Req->argv[Req->argc - 1], sizeof(mask));
1184         for (query = strtok(ngt_LowerStr(mask), ",");
1185                         query && found < 3;
1186                         query = strtok(NULL, ","), found++)
1187         {
1188                 has_wildcards = query[strcspn(query, "*?")] != 0;
1189                 /*
1190                  * follows ircd 2.10 implementation:
1191                  *  - handle up to 3 targets
1192                  *  - no wildcards for remote clients
1193                  *  - only one wildcard target per local client
1194                  *
1195                  *  Also, at most MAX_RPL_WHOIS matches are returned.
1196                  */
1197                 if (!has_wildcards || is_remote) {
1198                         c = Client_Search(query);
1199                         if (c && Client_Type(c) == CLIENT_USER) {
1200                                 if (!IRC_WHOIS_SendReply(Client, from, c))
1201                                         return DISCONNECTED;
1202                         } else {
1203                                 if (!IRC_WriteStrClient(Client,
1204                                                         ERR_NOSUCHNICK_MSG,
1205                                                         Client_ID(Client),
1206                                                         query))
1207                                         return DISCONNECTED;
1208                         }
1209                         continue;
1210                 }
1211                 if (got_wildcard) {
1212                         /* we already handled one wildcard query */
1213                         if (!IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1214                              Client_ID(Client), query))
1215                                 return DISCONNECTED;
1216                         continue;
1217                 }
1218                 got_wildcard = true;
1219                 IRC_SetPenalty(Client, 3);
1220
1221                 for (c = Client_First(); c; c = Client_Next(c)) {
1222                         if (IRC_CheckListTooBig(Client, match_count,
1223                                             MAX_RPL_WHOIS, "WHOIS"))
1224                                 break;
1225
1226                         if (Client_Type(c) != CLIENT_USER)
1227                                 continue;
1228                         if (!MatchCaseInsensitive(query, Client_ID(c)))
1229                                 continue;
1230                         if (!IRC_WHOIS_SendReply(Client, from, c))
1231                                 return DISCONNECTED;
1232
1233                         match_count++;
1234                 }
1235
1236                 if (match_count == 0)
1237                         IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1238                                            Client_ID(Client),
1239                                            Req->argv[Req->argc - 1]);
1240         }
1241         return IRC_WriteStrClient(from, RPL_ENDOFWHOIS_MSG,
1242                                   Client_ID(from), Req->argv[Req->argc - 1]);
1243 } /* IRC_WHOIS */
1244
1245
1246 static bool
1247 WHOWAS_EntryWrite(CLIENT *prefix, WHOWAS *entry)
1248 {
1249         char t_str[60];
1250
1251         (void)strftime(t_str, sizeof(t_str), "%a %b %d %H:%M:%S %Y",
1252                                         localtime(&entry->time));
1253
1254         if (!IRC_WriteStrClient(prefix, RPL_WHOWASUSER_MSG, Client_ID(prefix),
1255                         entry->id, entry->user, entry->host, entry->info))
1256                                 return DISCONNECTED;
1257
1258         return IRC_WriteStrClient(prefix, RPL_WHOISSERVER_MSG, Client_ID(prefix),
1259                   entry->id, entry->server, t_str);
1260 }
1261
1262 /**
1263  * IRC "WHOWAS" function.
1264  * This function implements the IRC command "WHOWHAS". It handles local
1265  * requests and request that should be forwarded to other servers.
1266  */
1267 GLOBAL bool
1268 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
1269 {
1270         CLIENT *target, *prefix;
1271         WHOWAS *whowas;
1272         char tok_buf[COMMAND_LEN];
1273         int max, last, count, i, nc;
1274         const char *nick;
1275
1276         assert( Client != NULL );
1277         assert( Req != NULL );
1278
1279         /* Do not reveal any info on disconnected users? */
1280         if (Conf_MorePrivacy)
1281                 return CONNECTED;
1282
1283         /* Wrong number of parameters? */
1284         if (Req->argc > 3)
1285                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1286                                         Client_ID(Client), Req->command);
1287         if (Req->argc < 1)
1288                 return IRC_WriteStrClient(Client, ERR_NONICKNAMEGIVEN_MSG, Client_ID(Client));
1289
1290         /* Search target */
1291         if (Req->argc == 3)
1292                 target = Client_Search(Req->argv[2]);
1293         else
1294                 target = Client_ThisServer();
1295
1296         /* Get prefix */
1297         if (Client_Type(Client) == CLIENT_SERVER)
1298                 prefix = Client_Search(Req->prefix);
1299         else
1300                 prefix = Client;
1301
1302         if (!prefix)
1303                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1304                                                 Client_ID(Client), Req->prefix);
1305
1306         /* Forward to other server? */
1307         if (target != Client_ThisServer()) {
1308                 if (!target || (Client_Type(target) != CLIENT_SERVER))
1309                         return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
1310                                         Client_ID(prefix), Req->argv[2]);
1311
1312                 /* Forward */
1313                 IRC_WriteStrClientPrefix( target, prefix, "WHOWAS %s %s %s",
1314                                           Req->argv[0], Req->argv[1],
1315                                           Req->argv[2] );
1316                 return CONNECTED;
1317         }
1318
1319         whowas = Client_GetWhowas( );
1320         last = Client_GetLastWhowasIndex( );
1321         if (last < 0)
1322                 last = 0;
1323
1324         max = DEF_RPL_WHOWAS;
1325         if (Req->argc > 1) {
1326                 max = atoi(Req->argv[1]);
1327                 if (max < 1)
1328                         max = MAX_RPL_WHOWAS;
1329         }
1330
1331         /*
1332          * Break up the nick argument into a list of nicks, if applicable
1333          * Can't modify Req->argv[0] because we need it for RPL_ENDOFWHOWAS_MSG.
1334          */
1335         strlcpy(tok_buf, Req->argv[0], sizeof(tok_buf));
1336         nick = strtok(tok_buf, ",");
1337
1338         for (i=last, count=0; nick != NULL ; nick = strtok(NULL, ",")) {
1339                 nc = 0;
1340                 do {
1341                         /* Used entry? */
1342                         if (whowas[i].time > 0 && strcasecmp(nick, whowas[i].id) == 0) {
1343                                 if (!WHOWAS_EntryWrite(prefix, &whowas[i]))
1344                                         return DISCONNECTED;
1345                                 nc++;
1346                                 count++;
1347                         }
1348                         /* previous entry */
1349                         i--;
1350
1351                         /* "underflow", wrap around */
1352                         if (i < 0)
1353                                 i = MAX_WHOWAS - 1;
1354
1355                         if (nc && count >= max)
1356                                 break;
1357                 } while (i != last);
1358
1359                 if (nc == 0 && !IRC_WriteStrClient(prefix, ERR_WASNOSUCHNICK_MSG,
1360                                                 Client_ID(prefix), nick))
1361                         return DISCONNECTED;
1362         }
1363         return IRC_WriteStrClient(prefix, RPL_ENDOFWHOWAS_MSG, Client_ID(prefix), Req->argv[0]);
1364 } /* IRC_WHOWAS */
1365
1366
1367 /**
1368  * Send LUSERS reply to a client.
1369  *
1370  * @param Client The receipient of the information.
1371  * @return CONNECTED or DISCONNECTED.
1372  */
1373 GLOBAL bool
1374 IRC_Send_LUSERS(CLIENT *Client)
1375 {
1376         unsigned long cnt;
1377 #ifndef STRICT_RFC
1378         unsigned long max;
1379 #endif
1380
1381         assert(Client != NULL);
1382
1383         /* Users, services and serevers in the network */
1384         if (!IRC_WriteStrClient(Client, RPL_LUSERCLIENT_MSG, Client_ID(Client),
1385                                 Client_UserCount(), Client_ServiceCount(),
1386                                 Client_ServerCount()))
1387                 return DISCONNECTED;
1388
1389         /* Number of IRC operators */
1390         cnt = Client_OperCount( );
1391         if (cnt > 0) {
1392                 if (!IRC_WriteStrClient(Client, RPL_LUSEROP_MSG,
1393                                         Client_ID(Client), cnt))
1394                         return DISCONNECTED;
1395         }
1396
1397         /* Unknown connections */
1398         cnt = Client_UnknownCount( );
1399         if (cnt > 0) {
1400                 if (!IRC_WriteStrClient(Client, RPL_LUSERUNKNOWN_MSG,
1401                                         Client_ID(Client), cnt))
1402                         return DISCONNECTED;
1403         }
1404
1405         /* Number of created channels */
1406         if (!IRC_WriteStrClient(Client, RPL_LUSERCHANNELS_MSG,
1407                                 Client_ID(Client),
1408                                 Channel_CountVisible(Client)))
1409                 return DISCONNECTED;
1410
1411         /* Number of local users, services and servers */
1412         if (!IRC_WriteStrClient(Client, RPL_LUSERME_MSG, Client_ID(Client),
1413                                 Client_MyUserCount(), Client_MyServiceCount(),
1414                                 Client_MyServerCount()))
1415                 return DISCONNECTED;
1416
1417 #ifndef STRICT_RFC
1418         /* Maximum number of local users */
1419         cnt = Client_MyUserCount();
1420         max = Client_MyMaxUserCount();
1421         if (! IRC_WriteStrClient(Client, RPL_LOCALUSERS_MSG, Client_ID(Client),
1422                         cnt, max, cnt, max))
1423                 return DISCONNECTED;
1424         /* Maximum number of users in the network */
1425         cnt = Client_UserCount();
1426         max = Client_MaxUserCount();
1427         if(! IRC_WriteStrClient(Client, RPL_NETUSERS_MSG, Client_ID(Client),
1428                         cnt, max, cnt, max))
1429                 return DISCONNECTED;
1430         /* Connection counters */
1431         if (! IRC_WriteStrClient(Client, RPL_STATSCONN_MSG, Client_ID(Client),
1432                         Conn_CountMax(), Conn_CountAccepted()))
1433                 return DISCONNECTED;
1434 #endif
1435
1436         return CONNECTED;
1437 } /* IRC_Send_LUSERS */
1438
1439
1440 static bool
1441 Show_MOTD_Start(CLIENT *Client)
1442 {
1443         return IRC_WriteStrClient(Client, RPL_MOTDSTART_MSG,
1444                 Client_ID( Client ), Client_ID( Client_ThisServer( )));
1445 }
1446
1447 static bool
1448 Show_MOTD_Sendline(CLIENT *Client, const char *msg)
1449 {
1450         return IRC_WriteStrClient(Client, RPL_MOTD_MSG, Client_ID( Client ), msg);
1451 }
1452
1453 static bool
1454 Show_MOTD_End(CLIENT *Client)
1455 {
1456         return IRC_WriteStrClient( Client, RPL_ENDOFMOTD_MSG, Client_ID( Client ));
1457 }
1458
1459 #ifdef SSL_SUPPORT
1460 static bool Show_MOTD_SSLInfo(CLIENT *Client)
1461 {
1462         bool ret = true;
1463         char buf[COMMAND_LEN] = "Connected using Cipher ";
1464
1465         if (!Conn_GetCipherInfo(Client_Conn(Client), buf + 23, sizeof buf - 23))
1466                 return true;
1467
1468         if (!Show_MOTD_Sendline(Client, buf))
1469                 ret = false;
1470
1471         return ret;
1472 }
1473 #else
1474 static inline bool
1475 Show_MOTD_SSLInfo(UNUSED CLIENT *c)
1476 { return true; }
1477 #endif
1478
1479 GLOBAL bool
1480 IRC_Show_MOTD( CLIENT *Client )
1481 {
1482         const char *line;
1483         size_t len_tot, len_str;
1484
1485         assert( Client != NULL );
1486
1487         len_tot = array_bytes(&Conf_Motd);
1488         if (len_tot == 0 && !Conn_UsesSSL(Client_Conn(Client)))
1489                 return IRC_WriteStrClient(Client, ERR_NOMOTD_MSG, Client_ID(Client));
1490
1491         if (!Show_MOTD_Start(Client))
1492                 return DISCONNECTED;
1493
1494         line = array_start(&Conf_Motd);
1495         while (len_tot > 0) {
1496                 len_str = strlen(line) + 1;
1497
1498                 assert(len_tot >= len_str);
1499                 len_tot -= len_str;
1500
1501                 if (!Show_MOTD_Sendline(Client, line))
1502                         return DISCONNECTED;
1503                 line += len_str;
1504         }
1505
1506         if (!Show_MOTD_SSLInfo(Client))
1507                 return DISCONNECTED;
1508         return Show_MOTD_End(Client);
1509 } /* IRC_Show_MOTD */
1510
1511
1512 GLOBAL bool
1513 IRC_Send_NAMES( CLIENT *Client, CHANNEL *Chan )
1514 {
1515         bool is_visible, is_member;
1516         char str[LINE_LEN + 1];
1517         CL2CHAN *cl2chan;
1518         CLIENT *cl;
1519
1520         assert( Client != NULL );
1521         assert( Chan != NULL );
1522
1523         if( Channel_IsMemberOf( Chan, Client )) is_member = true;
1524         else is_member = false;
1525
1526         /* Do not print info on channel memberships to anyone that is not member? */
1527         if (Conf_MorePrivacy && !is_member)
1528                 return CONNECTED;
1529
1530         /* Secret channel? */
1531         if( ! is_member && strchr( Channel_Modes( Chan ), 's' )) return CONNECTED;
1532
1533         /* Alle Mitglieder suchen */
1534         snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1535         cl2chan = Channel_FirstMember( Chan );
1536         while( cl2chan )
1537         {
1538                 cl = Channel_GetClient( cl2chan );
1539
1540                 if( strchr( Client_Modes( cl ), 'i' )) is_visible = false;
1541                 else is_visible = true;
1542
1543                 if( is_member || is_visible )
1544                 {
1545                         /* Nick anhaengen */
1546                         if( str[strlen( str ) - 1] != ':' ) strlcat( str, " ", sizeof( str ));
1547                         if( strchr( Channel_UserModes( Chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
1548                         else if( strchr( Channel_UserModes( Chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
1549                         strlcat( str, Client_ID( cl ), sizeof( str ));
1550
1551                         if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
1552                         {
1553                                 /* Zeile wird zu lang: senden! */
1554                                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1555                                 snprintf( str, sizeof( str ), RPL_NAMREPLY_MSG, Client_ID( Client ), "=", Channel_Name( Chan ));
1556                         }
1557                 }
1558
1559                 /* naechstes Mitglied suchen */
1560                 cl2chan = Channel_NextMember( Chan, cl2chan );
1561         }
1562         if( str[strlen( str ) - 1] != ':')
1563         {
1564                 /* Es sind noch Daten da, die gesendet werden muessen */
1565                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
1566         }
1567
1568         return CONNECTED;
1569 } /* IRC_Send_NAMES */
1570
1571
1572 /**
1573  * Send the ISUPPORT numeric (005).
1574  * This numeric indicates the features that are supported by this server.
1575  * See <http://www.irc.org/tech_docs/005.html> for details.
1576  */
1577 GLOBAL bool
1578 IRC_Send_ISUPPORT(CLIENT * Client)
1579 {
1580         if (!IRC_WriteStrClient(Client, RPL_ISUPPORT1_MSG, Client_ID(Client),
1581                                 Conf_MaxJoins))
1582                 return DISCONNECTED;
1583         return IRC_WriteStrClient(Client, RPL_ISUPPORT2_MSG, Client_ID(Client),
1584                                   CHANNEL_NAME_LEN - 1, Conf_MaxNickLength - 1,
1585                                   COMMAND_LEN - 23, CLIENT_AWAY_LEN - 1,
1586                                   COMMAND_LEN - 113, MAX_HNDL_MODES_ARG);
1587 } /* IRC_Send_ISUPPORT */
1588
1589
1590 /* -eof- */