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 #include "client-cap.h"
  43
  44 #include "exp.h"
  45 #include "irc-info.h"
  46
  47
  48 GLOBAL bool
  49 IRC_ADMIN(CLIENT *Client, REQUEST *Req )
  50 {
  51         CLIENT *target, *prefix;
  52
  53         assert( Client != NULL );
  54         assert( Req != NULL );
  55
  56         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  57
  58         /* find target ... */
  59         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
  60         else target = Client_ThisServer( );
  61
  62         /* find Prefix */
  63         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
  64         else prefix = Client;
  65         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  66
  67         /* forwad message to another server? */
  68         if( target != Client_ThisServer( ))
  69         {
  70                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
  71
  72                 /* forward */
  73                 IRC_WriteStrClientPrefix( target, prefix, "ADMIN %s", Req->argv[0] );
  74                 return CONNECTED;
  75         }
  76
  77         /* mit Versionsinfo antworten */
  78         if( ! IRC_WriteStrClient( Client, RPL_ADMINME_MSG, Client_ID( prefix ), Conf_ServerName )) return DISCONNECTED;
  79         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC1_MSG, Client_ID( prefix ), Conf_ServerAdmin1 )) return DISCONNECTED;
  80         if( ! IRC_WriteStrClient( Client, RPL_ADMINLOC2_MSG, Client_ID( prefix ), Conf_ServerAdmin2 )) return DISCONNECTED;
  81         if( ! IRC_WriteStrClient( Client, RPL_ADMINEMAIL_MSG, Client_ID( prefix ), Conf_ServerAdminMail )) return DISCONNECTED;
  82
  83         IRC_SetPenalty( Client, 1 );
  84         return CONNECTED;
  85 } /* IRC_ADMIN */
  86
  87
  88 /**
  89  * Handler for the IRC command "INFO".
  90  * See RFC 2812 section 3.4.10.
  91  */
  92 GLOBAL bool
  93 IRC_INFO(CLIENT * Client, REQUEST * Req)
  94 {
  95         CLIENT *target, *prefix;
  96         char msg[510];
  97
  98         assert(Client != NULL);
  99         assert(Req != NULL);
 100
 101         /* Wrong number of parameters? */
 102         if (Req->argc > 1)
 103                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 104                                           Client_ID(Client), Req->command);
 105
 106         /* Determine prefix */
 107         if (Client_Type(Client) == CLIENT_SERVER)
 108                 prefix = Client_Search(Req->prefix);
 109         else
 110                 prefix = Client;
 111         if (!prefix)
 112                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 113                                           Client_ID(Client), Req->prefix);
 114
 115         /* Look for a target */
 116         if (Req->argc > 0)
 117                 target = Client_Search(Req->argv[0]);
 118         else
 119                 target = Client_ThisServer();
 120
 121         /* Make sure that the target is a server */
 122         if (target && Client_Type(target) != CLIENT_SERVER)
 123                 target = Client_Introducer(target);
 124
 125         if (!target)
 126                 return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
 127                                           Client_ID(prefix), Req->argv[0]);
 128
 129         /* Pass on to another server? */
 130         if (target != Client_ThisServer()) {
 131                 IRC_WriteStrClientPrefix(target, prefix, "INFO %s",
 132                                          Req->argv[0]);
 133                 return CONNECTED;
 134         }
 135
 136         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix),
 137                                 NGIRCd_Version))
 138                 return DISCONNECTED;
 139
 140 #if defined(__DATE__) && defined(__TIME__)
 141         snprintf(msg, sizeof(msg), "Birth Date: %s at %s", __DATE__, __TIME__);
 142         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 143                 return DISCONNECTED;
 144 #endif
 145
 146         strlcpy(msg, "On-line since ", sizeof(msg));
 147         strlcat(msg, NGIRCd_StartStr, sizeof(msg));
 148         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 149                 return DISCONNECTED;
 150
 151         if (!IRC_WriteStrClient(Client, RPL_ENDOFINFO_MSG, Client_ID(prefix)))
 152                 return DISCONNECTED;
 153
 154         IRC_SetPenalty(Client, 2);
 155         return CONNECTED;
 156 } /* IRC_INFO */
 157
 158
 159 /**
 160  * Handler for the IRC "ISON" command.
 161  *
 162  * See RFC 2812, 4.9 "Ison message".
 163  *
 164  * @param Client The client from which this command has been received.
 165  * @param Req Request structure with prefix and all parameters.
 166  * @return CONNECTED or DISCONNECTED.
 167  */
 168 GLOBAL bool
 169 IRC_ISON( CLIENT *Client, REQUEST *Req )
 170 {
 171         char rpl[COMMAND_LEN];
 172         CLIENT *c;
 173         char *ptr;
 174         int i;
 175
 176         assert(Client != NULL);
 177         assert(Req != NULL);
 178
 179         /* Bad number of arguments? */
 180         if (Req->argc < 1)
 181                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 182                                           Client_ID(Client), Req->command);
 183
 184         strlcpy(rpl, RPL_ISON_MSG, sizeof rpl);
 185         for (i = 0; i < Req->argc; i++) {
 186                 /* "All" ircd even parse ":<x> <y> ..." arguments and split
 187                  * them up; so we do the same ... */
 188                 ptr = strtok(Req->argv[i], " ");
 189                 while (ptr) {
 190                         ngt_TrimStr(ptr);
 191                         c = Client_Search(ptr);
 192                         if (c && Client_Type(c) == CLIENT_USER) {
 193                                 strlcat(rpl, Client_ID(c), sizeof(rpl));
 194                                 strlcat(rpl, " ", sizeof(rpl));
 195                         }
 196                         ptr = strtok(NULL, " ");
 197                 }
 198         }
 199         ngt_TrimLastChr(rpl, ' ');
 200
 201         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 202 } /* IRC_ISON */
 203
 204
 205 /**
 206  * Handler for the IRC "LINKS" command.
 207  *
 208  * See RFC 2812, 3.4.5 "Links message".
 209  *
 210  * @param Client The client from which this command has been received.
 211  * @param Req Request structure with prefix and all parameters.
 212  * @return CONNECTED or DISCONNECTED.
 213  */
 214 GLOBAL bool
 215 IRC_LINKS(CLIENT *Client, REQUEST *Req)
 216 {
 217         CLIENT *target, *from, *c;
 218         char *mask;
 219
 220         assert(Client != NULL);
 221         assert(Req != NULL);
 222
 223         IRC_SetPenalty(Client, 1);
 224
 225         if (Req->argc > 2)
 226                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 227                                           Client_ID(Client), Req->command);
 228
 229         /* Get pointer to server mask or "*", if none given */
 230         if (Req->argc > 0)
 231                 mask = Req->argv[Req->argc - 1];
 232         else
 233                 mask = "*";
 234
 235         if (Client_Type(Client) == CLIENT_SERVER)
 236                 from = Client_Search(Req->prefix);
 237         else
 238                 from = Client;
 239         if (!from)
 240                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 241                                           Client_ID(Client), Req->prefix);
 242
 243         /* Forward? */
 244         if (Req->argc == 2) {
 245                 target = Client_Search(Req->argv[0]);
 246                 if (! target || Client_Type(target) != CLIENT_SERVER)
 247                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 248                                                   Client_ID(from),
 249                                                   Req->argv[0] );
 250                 else
 251                         if (target != Client_ThisServer())
 252                                 return IRC_WriteStrClientPrefix(target, from,
 253                                                 "LINKS %s %s", Req->argv[0],
 254                                                 Req->argv[1]);
 255         }
 256
 257         c = Client_First();
 258         while (c) {
 259                 if (Client_Type(c) == CLIENT_SERVER
 260                     && MatchCaseInsensitive(mask, Client_ID(c))) {
 261                         if (!IRC_WriteStrClient(from, RPL_LINKS_MSG,
 262                                         Client_ID(from), Client_ID(c),
 263                                         Client_ID(Client_TopServer(c)
 264                                                   ? Client_TopServer(c)
 265                                                   : Client_ThisServer()),
 266                                         Client_Hops(c), Client_Info(c)))
 267                                 return DISCONNECTED;
 268                 }
 269                 c = Client_Next(c);
 270         }
 271         return IRC_WriteStrClient(from, RPL_ENDOFLINKS_MSG,
 272                                   Client_ID(from), mask);
 273 } /* IRC_LINKS */
 274
 275
 276 GLOBAL bool
 277 IRC_LUSERS( CLIENT *Client, REQUEST *Req )
 278 {
 279         CLIENT *target, *from;
 280
 281         assert( Client != NULL );
 282         assert( Req != NULL );
 283
 284         if(( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 285
 286         /* Absender ermitteln */
 287         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 288         else from = Client;
 289         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 290
 291         /* An anderen Server forwarden? */
 292         if( Req->argc == 2 )
 293         {
 294                 target = Client_Search( Req->argv[1] );
 295                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 296                 else if( target != Client_ThisServer( )) return IRC_WriteStrClientPrefix( target, from, "LUSERS %s %s", Req->argv[0], Req->argv[1] );
 297         }
 298
 299         /* Wer ist der Absender? */
 300         if( Client_Type( Client ) == CLIENT_SERVER ) target = Client_Search( Req->prefix );
 301         else target = Client;
 302         if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 303
 304         IRC_Send_LUSERS( target );
 305
 306         IRC_SetPenalty( target, 1 );
 307         return CONNECTED;
 308 } /* IRC_LUSERS */
 309
 310
 311 /**
 312  * Handler for the IRC command "SERVLIST".
 313  * List registered services, see RFC 2811, section 3.5.1: the syntax is
 314  * "SERVLIST [<mask> [<type>]]".
 315  */
 316 GLOBAL bool
 317 IRC_SERVLIST(CLIENT *Client, REQUEST *Req)
 318 {
 319         CLIENT *c;
 320
 321         assert(Client != NULL);
 322         assert(Req != NULL);
 323
 324         if (Req->argc > 2)
 325                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 326                                           Client_ID(Client), Req->command);
 327
 328         if (Req->argc < 2 || strcmp(Req->argv[1], "0") == 0) {
 329                 for (c = Client_First(); c!= NULL; c = Client_Next(c)) {
 330                         if (Client_Type(c) != CLIENT_SERVICE)
 331                                 continue;
 332                         if (Req->argc > 0 && !MatchCaseInsensitive(Req->argv[0],
 333                                                                   Client_ID(c)))
 334                                 continue;
 335                         if (!IRC_WriteStrClient(Client, RPL_SERVLIST_MSG,
 336                                         Client_ID(Client), Client_Mask(c),
 337                                         Client_Mask(Client_Introducer(c)), "*",
 338                                         0, Client_Hops(c), Client_Info(c)))
 339                                 return DISCONNECTED;
 340                 }
 341         }
 342
 343         return IRC_WriteStrClient(Client, RPL_SERVLISTEND_MSG, Client_ID(Client),
 344                                   Req->argc > 0 ? Req->argv[0] : "*",
 345                                   Req->argc > 1 ? Req->argv[1] : "0");
 346 } /* IRC_SERVLIST */
 347
 348
 349 GLOBAL bool
 350 IRC_MOTD( CLIENT *Client, REQUEST *Req )
 351 {
 352         CLIENT *from, *target;
 353
 354         assert( Client != NULL );
 355         assert( Req != NULL );
 356
 357         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 358
 359         /* From aus Prefix ermitteln */
 360         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 361         else from = Client;
 362         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 363
 364         if( Req->argc == 1 )
 365         {
 366                 /* forward? */
 367                 target = Client_Search( Req->argv[0] );
 368                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 369
 370                 if( target != Client_ThisServer( ))
 371                 {
 372                         /* Ok, anderer Server ist das Ziel: forwarden */
 373                         return IRC_WriteStrClientPrefix( target, from, "MOTD %s", Req->argv[0] );
 374                 }
 375         }
 376
 377         IRC_SetPenalty( from, 3 );
 378         return IRC_Show_MOTD( from );
 379 } /* IRC_MOTD */
 380
 381
 382 GLOBAL bool
 383 IRC_NAMES( CLIENT *Client, REQUEST *Req )
 384 {
 385         char rpl[COMMAND_LEN], *ptr;
 386         CLIENT *target, *from, *c;
 387         CHANNEL *chan;
 388
 389         assert( Client != NULL );
 390         assert( Req != NULL );
 391
 392         if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 393
 394         /* use prefix to determine "From" */
 395         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 396         else from = Client;
 397         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 398
 399         if( Req->argc == 2 )
 400         {
 401                 /* forward to another server? */
 402                 target = Client_Search( Req->argv[1] );
 403                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
 404
 405                 if( target != Client_ThisServer( )) {
 406                         /* target is another server, forward */
 407                         return IRC_WriteStrClientPrefix( target, from, "NAMES %s :%s", Req->argv[0], Req->argv[1] );
 408                 }
 409         }
 410
 411         if( Req->argc > 0 )
 412         {
 413                 /* bestimmte Channels durchgehen */
 414                 ptr = strtok( Req->argv[0], "," );
 415                 while( ptr )
 416                 {
 417                         chan = Channel_Search( ptr );
 418                         if( chan )
 419                         {
 420                                 /* print name */
 421                                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 422                         }
 423                         if( ! IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), ptr )) return DISCONNECTED;
 424
 425                         /* get next channel name */
 426                         ptr = strtok( NULL, "," );
 427                 }
 428                 return CONNECTED;
 429         }
 430
 431         chan = Channel_First( );
 432         while( chan )
 433         {
 434                 if( ! IRC_Send_NAMES( from, chan )) return DISCONNECTED;
 435
 436                 chan = Channel_Next( chan );
 437         }
 438
 439         /* Now print all clients which are not in any channel */
 440         c = Client_First( );
 441         snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 442         while( c )
 443         {
 444                 if(( Client_Type( c ) == CLIENT_USER ) && ( Channel_FirstChannelOf( c ) == NULL ) && ( ! strchr( Client_Modes( c ), 'i' )))
 445                 {
 446                         /* its a user, concatenate ... */
 447                         if( rpl[strlen( rpl ) - 1] != ':' ) strlcat( rpl, " ", sizeof( rpl ));
 448                         strlcat( rpl, Client_ID( c ), sizeof( rpl ));
 449
 450                         if( strlen( rpl ) > ( LINE_LEN - CLIENT_NICK_LEN - 4 ))
 451                         {
 452                                 /* Line is gwoing too long, send now */
 453                                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 454                                 snprintf( rpl, sizeof( rpl ), RPL_NAMREPLY_MSG, Client_ID( from ), "*", "*" );
 455                         }
 456                 }
 457
 458                 c = Client_Next( c );
 459         }
 460         if( rpl[strlen( rpl ) - 1] != ':')
 461         {
 462                 if( ! IRC_WriteStrClient( from, "%s", rpl )) return DISCONNECTED;
 463         }
 464
 465         IRC_SetPenalty( from, 1 );
 466         return IRC_WriteStrClient( from, RPL_ENDOFNAMES_MSG, Client_ID( from ), "*" );
 467 } /* IRC_NAMES */
 468
 469
 470 static unsigned int
 471 t_diff(time_t *t, const time_t d)
 472 {
 473         time_t diff, remain;
 474
 475         diff = *t / d;
 476         remain = diff * d;
 477         *t -= remain;
 478
 479         return (unsigned int)diff;
 480 }
 481
 482
 483 static unsigned int
 484 uptime_days(time_t *now)
 485 {
 486         return t_diff(now, 60 * 60 * 24);
 487 }
 488
 489
 490 static unsigned int
 491 uptime_hrs(time_t *now)
 492 {
 493         return t_diff(now, 60 * 60);
 494 }
 495
 496
 497 static unsigned int
 498 uptime_mins(time_t *now)
 499 {
 500          return t_diff(now, 60);
 501 }
 502
 503
 504 /**
 505  * Handler for the IRC command "STATS".
 506  * See RFC 2812 section 3.4.4.
 507  */
 508 GLOBAL bool
 509 IRC_STATS( CLIENT *Client, REQUEST *Req )
 510 {
 511         CLIENT *from, *target, *cl;
 512         CONN_ID con;
 513         char query;
 514         COMMAND *cmd;
 515         time_t time_now;
 516         unsigned int days, hrs, mins;
 517         struct list_head *list;
 518         struct list_elem *list_item;
 519
 520         assert(Client != NULL);
 521         assert(Req != NULL);
 522
 523         if (Req->argc > 2)
 524                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 525                                           Client_ID(Client), Req->command);
 526
 527         /* use prefix to determine "From" */
 528         if (Client_Type(Client) == CLIENT_SERVER)
 529                 from = Client_Search(Req->prefix);
 530         else
 531                 from = Client;
 532
 533         if (!from)
 534                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 535                                           Client_ID(Client), Req->prefix);
 536
 537         if (Req->argc == 2) {
 538                 /* forward to another server? */
 539                 target = Client_Search(Req->argv[1]);
 540                 if ((!target) || (Client_Type(target) != CLIENT_SERVER))
 541                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 542                                                  Client_ID(from), Req->argv[1]);
 543
 544                 if (target != Client_ThisServer()) {
 545                         /* forward to another server */
 546                         return IRC_WriteStrClientPrefix(target, from,
 547                                      "STATS %s %s", Req->argv[0], Req->argv[1]);
 548                 }
 549         }
 550
 551         if (Req->argc > 0)
 552                 query = Req->argv[0][0] ? Req->argv[0][0] : '*';
 553         else
 554                 query = '*';
 555
 556         switch (query) {
 557         case 'g':       /* Network-wide bans ("G-Lines") */
 558         case 'G':
 559         case 'k':       /* Server-local bans ("K-Lines") */
 560         case 'K':
 561                 if (!Client_HasMode(from, 'o'))
 562                     return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
 563                                               Client_ID(from));
 564                 if (query == 'g' || query == 'G')
 565                         list = Class_GetList(CLASS_GLINE);
 566                 else
 567                         list = Class_GetList(CLASS_KLINE);
 568                         list_item = Lists_GetFirst(list);
 569                         while (list_item) {
 570                                 if (!IRC_WriteStrClient(from, RPL_STATSXLINE_MSG,
 571                                                 Client_ID(from), query,
 572                                                 Lists_GetMask(list_item),
 573                                                 Lists_GetValidity(list_item),
 574                                                 Lists_GetReason(list_item)))
 575                                         return DISCONNECTED;
 576                                 list_item = Lists_GetNext(list_item);
 577                         }
 578                 break;
 579         case 'l':       /* Link status (servers and own link) */
 580         case 'L':
 581                 time_now = time(NULL);
 582                 for (con = Conn_First(); con != NONE; con = Conn_Next(con)) {
 583                         cl = Conn_GetClient(con);
 584                         if (!cl)
 585                                 continue;
 586                         if ((Client_Type(cl) == CLIENT_SERVER)
 587                             || (cl == Client)) {
 588                                 /* Server link or our own connection */
 589 #ifdef ZLIB
 590                                 if (Conn_Options(con) & CONN_ZIP) {
 591                                         if (!IRC_WriteStrClient
 592                                             (from, RPL_STATSLINKINFOZIP_MSG,
 593                                              Client_ID(from), Client_Mask(cl),
 594                                              Conn_SendQ(con), Conn_SendMsg(con),
 595                                              Zip_SendBytes(con),
 596                                              Conn_SendBytes(con),
 597                                              Conn_RecvMsg(con),
 598                                              Zip_RecvBytes(con),
 599                                              Conn_RecvBytes(con),
 600                                              (long)(time_now - Conn_StartTime(con))))
 601                                                 return DISCONNECTED;
 602                                         continue;
 603                                 }
 604 #endif
 605                                 if (!IRC_WriteStrClient
 606                                     (from, RPL_STATSLINKINFO_MSG,
 607                                      Client_ID(from), Client_Mask(cl),
 608                                      Conn_SendQ(con), Conn_SendMsg(con),
 609                                      Conn_SendBytes(con), Conn_RecvMsg(con),
 610                                      Conn_RecvBytes(con),
 611                                      (long)(time_now - Conn_StartTime(con))))
 612                                         return DISCONNECTED;
 613                         }
 614                 }
 615                 break;
 616         case 'm':       /* IRC command status (usage count) */
 617         case 'M':
 618                 cmd = Parse_GetCommandStruct();
 619                 for (; cmd->name; cmd++) {
 620                         if (cmd->lcount == 0 && cmd->rcount == 0)
 621                                 continue;
 622                         if (!IRC_WriteStrClient
 623                             (from, RPL_STATSCOMMANDS_MSG, Client_ID(from),
 624                              cmd->name, cmd->lcount, cmd->bytes, cmd->rcount))
 625                                 return DISCONNECTED;
 626                 }
 627                 break;
 628         case 'u':       /* Server uptime */
 629         case 'U':
 630                 time_now = time(NULL) - NGIRCd_Start;
 631                 days = uptime_days(&time_now);
 632                 hrs = uptime_hrs(&time_now);
 633                 mins = uptime_mins(&time_now);
 634                 if (!IRC_WriteStrClient(from, RPL_STATSUPTIME, Client_ID(from),
 635                                        days, hrs, mins, (unsigned int)time_now))
 636                         return DISCONNECTED;
 637                 break;
 638         }
 639
 640         IRC_SetPenalty(from, 2);
 641         return IRC_WriteStrClient(from, RPL_ENDOFSTATS_MSG,
 642                                   Client_ID(from), query);
 643 } /* IRC_STATS */
 644
 645
 646 /**
 647  * Handler for the IRC command "SUMMON".
 648  * See RFC 2812 section 4.5. ngIRCd doesn't implement this functionality and
 649  * therefore answers with ERR_SUMMONDISABLED.
 650  */
 651 GLOBAL bool
 652 IRC_SUMMON(CLIENT * Client, UNUSED REQUEST * Req)
 653 {
 654         return IRC_WriteStrClient(Client, ERR_SUMMONDISABLED_MSG,
 655                                   Client_ID(Client));
 656 } /* IRC_SUMMON */
 657
 658
 659 GLOBAL bool
 660 IRC_TIME( CLIENT *Client, REQUEST *Req )
 661 {
 662         CLIENT *from, *target;
 663         char t_str[64];
 664         time_t t;
 665
 666         assert( Client != NULL );
 667         assert( Req != NULL );
 668
 669         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 670
 671         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 672         else from = Client;
 673         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 674
 675         if( Req->argc == 1 )
 676         {
 677                 target = Client_Search( Req->argv[0] );
 678                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[0] );
 679
 680                 if( target != Client_ThisServer( ))
 681                 {
 682                         return IRC_WriteStrClientPrefix( target, from, "TIME %s", Req->argv[0] );
 683                 }
 684         }
 685
 686         t = time( NULL );
 687         (void)strftime( t_str, 60, "%A %B %d %Y -- %H:%M %Z", localtime( &t ));
 688         return IRC_WriteStrClient( from, RPL_TIME_MSG, Client_ID( from ), Client_ID( Client_ThisServer( )), t_str );
 689 } /* IRC_TIME */
 690
 691
 692 /**
 693  * Handler for the IRC command "USERHOST".
 694  * See RFC 2812 section 4.8.
 695  */
 696 GLOBAL bool
 697 IRC_USERHOST(CLIENT *Client, REQUEST *Req)
 698 {
 699         char rpl[COMMAND_LEN];
 700         CLIENT *c;
 701         int max, i;
 702
 703         assert(Client != NULL);
 704         assert(Req != NULL);
 705
 706         if ((Req->argc < 1))
 707                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 708                                           Client_ID(Client), Req->command);
 709
 710         if (Req->argc > 5)
 711                 max = 5;
 712         else
 713                 max = Req->argc;
 714
 715         strlcpy(rpl, RPL_USERHOST_MSG, sizeof rpl);
 716         for (i = 0; i < max; i++) {
 717                 c = Client_Search(Req->argv[i]);
 718                 if (c && (Client_Type(c) == CLIENT_USER)) {
 719                         /* This Nick is "online" */
 720                         strlcat(rpl, Client_ID(c), sizeof(rpl));
 721                         if (Client_HasMode(c, 'o'))
 722                                 strlcat(rpl, "*", sizeof(rpl));
 723                         strlcat(rpl, "=", sizeof(rpl));
 724                         if (Client_HasMode(c, 'a'))
 725                                 strlcat(rpl, "-", sizeof(rpl));
 726                         else
 727                                 strlcat(rpl, "+", sizeof(rpl));
 728                         strlcat(rpl, Client_User(c), sizeof(rpl));
 729                         strlcat(rpl, "@", sizeof(rpl));
 730                         strlcat(rpl, Client_HostnameCloaked(c), sizeof(rpl));
 731                         strlcat(rpl, " ", sizeof(rpl));
 732                 }
 733         }
 734         ngt_TrimLastChr(rpl, ' ');
 735
 736         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 737 } /* IRC_USERHOST */
 738
 739
 740 /**
 741  * Handler for the IRC command "USERS".
 742  * See RFC 2812 section 4.6. As suggested there the command is disabled.
 743  */
 744 GLOBAL bool
 745 IRC_USERS(CLIENT * Client, UNUSED REQUEST * Req)
 746 {
 747         return IRC_WriteStrClient(Client, ERR_USERSDISABLED_MSG,
 748                                   Client_ID(Client));
 749 } /* IRC_USERS */
 750
 751
 752 GLOBAL bool
 753 IRC_VERSION( CLIENT *Client, REQUEST *Req )
 754 {
 755         CLIENT *target, *prefix;
 756
 757         assert( Client != NULL );
 758         assert( Req != NULL );
 759
 760         if(( Req->argc > 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 761
 762         /* Ziel suchen */
 763         if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
 764         else target = Client_ThisServer( );
 765
 766         /* Prefix ermitteln */
 767         if( Client_Type( Client ) == CLIENT_SERVER ) prefix = Client_Search( Req->prefix );
 768         else prefix = Client;
 769         if( ! prefix ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 770
 771         /* An anderen Server weiterleiten? */
 772         if( target != Client_ThisServer( ))
 773         {
 774                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG, Client_ID( prefix ), Req->argv[0] );
 775
 776                 /* forwarden */
 777                 IRC_WriteStrClientPrefix( target, prefix, "VERSION %s", Req->argv[0] );
 778                 return CONNECTED;
 779         }
 780
 781         /* send version information */
 782         IRC_SetPenalty(Client, 1);
 783         return IRC_WriteStrClient(Client, RPL_VERSION_MSG, Client_ID(prefix),
 784                                   PACKAGE_NAME, PACKAGE_VERSION,
 785                                   NGIRCd_DebugLevel, Conf_ServerName,
 786                                   NGIRCd_VersionAddition);
 787 } /* IRC_VERSION */
 788
 789
 790 static bool
 791 write_whoreply(CLIENT *Client, CLIENT *c, const char *channelname, const char *flags)
 792 {
 793         return IRC_WriteStrClient(Client, RPL_WHOREPLY_MSG, Client_ID(Client),
 794                                   channelname, Client_User(c),
 795                                   Client_HostnameCloaked(c),
 796                                   Client_ID(Client_Introducer(c)), Client_ID(c),
 797                                   flags, Client_Hops(c), Client_Info(c));
 798 }
 799
 800
 801 static const char *
 802 who_flags_status(const char *client_modes)
 803 {
 804         if (strchr(client_modes, 'a'))
 805                 return "G"; /* away */
 806         return "H";
 807 }
 808
 809
 810 /**
 811  * Return channel user mode prefix(es).
 812  *
 813  * @param Client The client requesting the mode prefixes.
 814  * @param chan_user_modes String with channel user modes.
 815  * @param str String buffer to which the prefix(es) will be appended.
 816  * @param len Size of "str" buffer.
 817  * @return Pointer to "str".
 818  */
 819 static char *
 820 who_flags_qualifier(CLIENT *Client, const char *chan_user_modes,
 821                     char *str, size_t len)
 822 {
 823         assert(Client != NULL);
 824
 825         if (Client_Cap(Client) & CLIENT_CAP_MULTI_PREFIX) {
 826                 if (strchr(chan_user_modes, 'q'))
 827                         strlcat(str, "~", len);
 828                 if (strchr(chan_user_modes, 'a'))
 829                         strlcat(str, "&", len);
 830                 if (strchr(chan_user_modes, 'o'))
 831                         strlcat(str, "@", len);
 832                 if (strchr(chan_user_modes, 'h'))
 833                         strlcat(str, "%", len);
 834                 if (strchr(chan_user_modes, 'v'))
 835                         strlcat(str, "+", len);
 836
 837                 return str;
 838         }
 839
 840         if (strchr(chan_user_modes, 'q'))
 841                 strlcat(str, "~", len);
 842         else if (strchr(chan_user_modes, 'a'))
 843                 strlcat(str, "&", len);
 844         else if (strchr(chan_user_modes, 'o'))
 845                 strlcat(str, "@", len);
 846         else if (strchr(chan_user_modes, 'h'))
 847                 strlcat(str, "%", len);
 848         else if (strchr(chan_user_modes, 'v'))
 849                 strlcat(str, "+", len);
 850
 851         return str;
 852 }
 853
 854
 855 /**
 856  * Send WHO reply for a "channel target" ("WHO #channel").
 857  *
 858  * @param Client Client requesting the information.
 859  * @param Chan Channel being requested.
 860  * @param OnlyOps Only display IRC operators.
 861  * @return CONNECTED or DISCONNECTED.
 862  */
 863 static bool
 864 IRC_WHO_Channel(CLIENT *Client, CHANNEL *Chan, bool OnlyOps)
 865 {
 866         bool is_visible, is_member, is_ircop;
 867         CL2CHAN *cl2chan;
 868         const char *client_modes;
 869         char flags[10];
 870         CLIENT *c;
 871         int count = 0;
 872
 873         assert( Client != NULL );
 874         assert( Chan != NULL );
 875
 876         IRC_SetPenalty(Client, 1);
 877
 878         is_member = Channel_IsMemberOf(Chan, Client);
 879
 880         /* Secret channel? */
 881         if (!is_member && strchr(Channel_Modes(Chan), 's'))
 882                 return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG,
 883                                           Client_ID(Client), Channel_Name(Chan));
 884
 885         cl2chan = Channel_FirstMember(Chan);
 886         for (; cl2chan ; cl2chan = Channel_NextMember(Chan, cl2chan)) {
 887                 c = Channel_GetClient(cl2chan);
 888
 889                 client_modes = Client_Modes(c);
 890                 is_ircop = strchr(client_modes, 'o') != NULL;
 891                 if (OnlyOps && !is_ircop)
 892                         continue;
 893
 894                 is_visible = strchr(client_modes, 'i') == NULL;
 895                 if (is_member || is_visible) {
 896                         strcpy(flags, who_flags_status(client_modes));
 897                         if (is_ircop)
 898                                 strlcat(flags, "*", sizeof(flags));
 899
 900                         who_flags_qualifier(Client, Channel_UserModes(Chan, c),
 901                                             flags, sizeof(flags));
 902
 903                         if (!write_whoreply(Client, c, Channel_Name(Chan),
 904                                             flags))
 905                                 return DISCONNECTED;
 906                         count++;
 907                 }
 908         }
 909
 910         /* If there are a lot of clients, augment penalty a bit */
 911         if (count > MAX_RPL_WHO)
 912                 IRC_SetPenalty(Client, 1);
 913
 914         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 915                                   Channel_Name(Chan));
 916 }
 917
 918
 919 /**
 920  * Send WHO reply for a "mask target" ("WHO m*sk").
 921  *
 922  * @param Client Client requesting the information.
 923  * @param Mask Mask being requested or NULL for "all" clients.
 924  * @param OnlyOps Only display IRC operators.
 925  * @return CONNECTED or DISCONNECTED.
 926  */
 927 static bool
 928 IRC_WHO_Mask(CLIENT *Client, char *Mask, bool OnlyOps)
 929 {
 930         CLIENT *c;
 931         CL2CHAN *cl2chan;
 932         CHANNEL *chan;
 933         bool client_match, is_visible;
 934         char flags[4];
 935         int count = 0;
 936
 937         assert (Client != NULL);
 938
 939         if (Mask)
 940                 ngt_LowerStr(Mask);
 941
 942         IRC_SetPenalty(Client, 3);
 943         for (c = Client_First(); c != NULL; c = Client_Next(c)) {
 944                 if (Client_Type(c) != CLIENT_USER)
 945                         continue;
 946
 947                 if (OnlyOps && !Client_HasMode(c, 'o'))
 948                         continue;
 949
 950                 if (Mask) {
 951                         /* Match pattern against user host/server/name/nick */
 952                         client_match = MatchCaseInsensitive(Mask,
 953                                                 Client_Hostname(c));
 954                         if (!client_match)
 955                                 client_match = MatchCaseInsensitive(Mask,
 956                                                 Client_ID(Client_Introducer(c)));
 957                         if (!client_match)
 958                                 client_match = MatchCaseInsensitive(Mask,
 959                                                 Client_Info(c));
 960                         if (!client_match)
 961                                 client_match = MatchCaseInsensitive(Mask,
 962                                                 Client_ID(c));
 963                         if (!client_match)
 964                                 continue;       /* no match: skip this client */
 965                 }
 966
 967                 is_visible = !Client_HasMode(c, 'i');
 968
 969                 /* Target client is invisible, but mask matches exactly? */
 970                 if (!is_visible && Mask && strcasecmp(Client_ID(c), Mask) == 0)
 971                         is_visible = true;
 972
 973                 /* Target still invisible, but are both on the same channel? */
 974                 if (!is_visible) {
 975                         cl2chan = Channel_FirstChannelOf(Client);
 976                         while (cl2chan && !is_visible) {
 977                                 chan = Channel_GetChannel(cl2chan);
 978                                 if (Channel_IsMemberOf(chan, c))
 979                                         is_visible = true;
 980                                 cl2chan = Channel_NextChannelOf(Client, cl2chan);
 981                         }
 982                 }
 983
 984                 if (!is_visible)        /* target user is not visible */
 985                         continue;
 986
 987                 if (IRC_CheckListTooBig(Client, count, MAX_RPL_WHO, "WHO"))
 988                         break;
 989
 990                 strcpy(flags, who_flags_status(Client_Modes(c)));
 991                 if (strchr(Client_Modes(c), 'o'))
 992                         strlcat(flags, "*", sizeof(flags));
 993
 994                 if (!write_whoreply(Client, c, "*", flags))
 995                         return DISCONNECTED;
 996                 count++;
 997         }
 998
 999         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
1000                                   Mask ? Mask : "*");
1001 }
1002
1003
1004 /**
1005  * Handler for the IRC "WHO" command.
1006  *
1007  * See RFC 2812, 3.6.1 "Who query".
1008  *
1009  * @param Client The client from which this command has been received.
1010  * @param Req Request structure with prefix and all parameters.
1011  * @return CONNECTED or DISCONNECTED.
1012  */
1013 GLOBAL bool
1014 IRC_WHO(CLIENT *Client, REQUEST *Req)
1015 {
1016         bool only_ops;
1017         CHANNEL *chan;
1018
1019         assert (Client != NULL);
1020         assert (Req != NULL);
1021
1022         if (Req->argc > 2)
1023                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1024                                           Client_ID(Client), Req->command);
1025
1026         only_ops = false;
1027
1028         if (Req->argc == 2) {
1029                 if (strcmp(Req->argv[1], "o") == 0)
1030                         only_ops = true;
1031 #ifdef STRICT_RFC
1032                 else
1033                         return IRC_WriteStrClient(Client,
1034                                                   ERR_NEEDMOREPARAMS_MSG,
1035                                                   Client_ID(Client),
1036                                                   Req->command);
1037 #endif
1038         }
1039
1040         IRC_SetPenalty(Client, 1);
1041         if (Req->argc >= 1) {
1042                 /* Channel or mask given */
1043                 chan = Channel_Search(Req->argv[0]);
1044                 if (chan) {
1045                         /* Members of a channel have been requested */
1046                         return IRC_WHO_Channel(Client, chan, only_ops);
1047                 }
1048                 if (strcmp(Req->argv[0], "0") != 0) {
1049                         /* A mask has been given. But please note this RFC
1050                          * stupidity: "0" is same as no arguments ... */
1051                         return IRC_WHO_Mask(Client, Req->argv[0], only_ops);
1052                 }
1053         }
1054
1055         /* No channel or (valid) mask given */
1056         IRC_SetPenalty(Client, 2);
1057         return IRC_WHO_Mask(Client, NULL, only_ops);
1058 } /* IRC_WHO */
1059
1060
1061 /**
1062  * Generate WHOIS reply of one actual client.
1063  *
1064  * @param Client The client from which this command has been received.
1065  * @param from The client requesting the information ("originator").
1066  * @param c The client of which information should be returned.
1067  * @return CONNECTED or DISCONNECTED.
1068  */
1069 static bool
1070 IRC_WHOIS_SendReply(CLIENT *Client, CLIENT *from, CLIENT *c)
1071 {
1072         char str[LINE_LEN + 1];
1073         CL2CHAN *cl2chan;
1074         CHANNEL *chan;
1075
1076         assert(Client != NULL);
1077         assert(from != NULL);
1078         assert(c != NULL);
1079
1080         /* Nick, user, hostname and client info */
1081         if (!IRC_WriteStrClient(from, RPL_WHOISUSER_MSG, Client_ID(from),
1082                                 Client_ID(c), Client_User(c),
1083                                 Client_HostnameCloaked(c), Client_Info(c)))
1084                 return DISCONNECTED;
1085
1086         /* Server */
1087         if (!IRC_WriteStrClient(from, RPL_WHOISSERVER_MSG, Client_ID(from),
1088                                 Client_ID(c), Client_ID(Client_Introducer(c)),
1089                                 Client_Info(Client_Introducer(c))))
1090                 return DISCONNECTED;
1091
1092         /* Channels */
1093         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1094                  Client_ID(from), Client_ID(c));
1095         cl2chan = Channel_FirstChannelOf(c);
1096         while (cl2chan) {
1097                 chan = Channel_GetChannel(cl2chan);
1098                 assert(chan != NULL);
1099
1100                 /* next */
1101                 cl2chan = Channel_NextChannelOf(c, cl2chan);
1102
1103                 /* Secret channel? */
1104                 if (strchr(Channel_Modes(chan), 's')
1105                     && !Channel_IsMemberOf(chan, Client))
1106                         continue;
1107
1108                 /* Local channel and request is not from a user? */
1109                 if (Client_Type(Client) == CLIENT_SERVER
1110                     && Channel_IsLocal(chan))
1111                         continue;
1112
1113                 /* Concatenate channel names */
1114                 if (str[strlen(str) - 1] != ':')
1115                         strlcat(str, " ", sizeof(str));
1116
1117                 who_flags_qualifier(Client, Channel_UserModes(chan, c),
1118                                     str, sizeof(str));
1119                 strlcat(str, Channel_Name(chan), sizeof(str));
1120
1121                 if (strlen(str) > (LINE_LEN - CHANNEL_NAME_LEN - 4)) {
1122                         /* Line becomes too long: send it! */
1123                         if (!IRC_WriteStrClient(Client, "%s", str))
1124                                 return DISCONNECTED;
1125                         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
1126                                  Client_ID(from), Client_ID(c));
1127                 }
1128         }
1129         if(str[strlen(str) - 1] != ':') {
1130                 /* There is data left to send: */
1131                 if (!IRC_WriteStrClient(Client, "%s", str))
1132                         return DISCONNECTED;
1133         }
1134
1135         /* IRC-Operator? */
1136         if (Client_HasMode(c, 'o') &&
1137             !IRC_WriteStrClient(from, RPL_WHOISOPERATOR_MSG,
1138                                 Client_ID(from), Client_ID(c)))
1139                 return DISCONNECTED;
1140
1141         /* IRC-Bot? */
1142         if (Client_HasMode(c, 'B') &&
1143             !IRC_WriteStrClient(from, RPL_WHOISBOT_MSG,
1144                                 Client_ID(from), Client_ID(c)))
1145                 return DISCONNECTED;
1146
1147         /* Connected using SSL? */
1148         if (Conn_UsesSSL(Client_Conn(c)) &&
1149             !IRC_WriteStrClient(from, RPL_WHOISSSL_MSG, Client_ID(from),
1150                                 Client_ID(c)))
1151                 return DISCONNECTED;
1152
1153         /* Registered nick name? */
1154         if (Client_HasMode(c, 'R') &&
1155             !IRC_WriteStrClient(from, RPL_WHOISREGNICK_MSG,
1156                                 Client_ID(from), Client_ID(c)))
1157                 return DISCONNECTED;
1158
1159         if (Client_Conn(c) > NONE &&
1160             (from == c || (!Conf_MorePrivacy && Client_HasMode(from, 'o'))) &&
1161             !IRC_WriteStrClient(from, RPL_WHOISMODES_MSG, Client_ID(from),
1162                                 Client_ID(c), Client_Modes(c)))
1163                 return DISCONNECTED;
1164
1165         if (Client_Conn(c) > NONE && (Client_OperByMe(from) || from == c) &&
1166             !IRC_WriteStrClient(from, RPL_WHOISHOST_MSG, Client_ID(from),
1167                                 Client_ID(c), Client_Hostname(c),
1168                                 Conn_GetIPAInfo(Client_Conn(c))))
1169                 return DISCONNECTED;
1170
1171         /* Idle and signon time (local clients only!) */
1172         if (!Conf_MorePrivacy && Client_Conn(c) > NONE &&
1173             !IRC_WriteStrClient(from, RPL_WHOISIDLE_MSG,
1174                                 Client_ID(from), Client_ID(c),
1175                                 (unsigned long)Conn_GetIdle(Client_Conn(c)),
1176                                 (unsigned long)Conn_GetSignon(Client_Conn(c))))
1177                 return DISCONNECTED;
1178
1179         /* Away? */
1180         if (Client_HasMode(c, 'a') &&
1181             !IRC_WriteStrClient(from, RPL_AWAY_MSG,
1182                                 Client_ID(from), Client_ID(c), Client_Away(c)))
1183                 return DISCONNECTED;
1184
1185         return CONNECTED;
1186 } /* IRC_WHOIS_SendReply */
1187
1188
1189 /**
1190  * Handler for the IRC "WHOIS" command.
1191  *
1192  * See RFC 2812, 3.6.2 "Whois query".
1193  *
1194  * @param Client        The client from which this command has been received.
1195  * @param Req           Request structure with prefix and all parameters.
1196  * @return              CONNECTED or DISCONNECTED.
1197  */
1198 GLOBAL bool
1199 IRC_WHOIS( CLIENT *Client, REQUEST *Req )
1200 {
1201         CLIENT *from, *target, *c;
1202         unsigned int match_count = 0, found = 0;
1203         bool has_wildcards, is_remote;
1204         bool got_wildcard = false;
1205         char mask[COMMAND_LEN], *query;
1206
1207         assert( Client != NULL );
1208         assert( Req != NULL );
1209
1210         /* Bad number of parameters? */
1211         if (Req->argc < 1 || Req->argc > 2)
1212                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1213                                           Client_ID(Client), Req->command);
1214
1215         /* Search sender of the WHOIS */
1216         if (Client_Type(Client) == CLIENT_SERVER) {
1217                 from = Client_Search(Req->prefix);
1218         } else {
1219                 IRC_SetPenalty(Client, 1);
1220                 from = Client;
1221         }
1222         if (!from)
1223                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1224                                           Client_ID(Client), Req->prefix);
1225
1226         /* Get target server for this command */
1227         if (Req->argc > 1) {
1228                 /* Search the target server, which can be specified as a
1229                  * nick name on that server as well: */
1230                 target = Client_Search(Req->argv[0]);
1231                 if (!target)
1232                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
1233                                                 Client_ID(from), Req->argv[0]);
1234         } else
1235                 target = Client_ThisServer();
1236         assert(target != NULL);
1237
1238         /* Forward to other server? */
1239         if (Client_NextHop(target) != Client_ThisServer() &&
1240             Client_Type(Client_NextHop(target)) == CLIENT_SERVER)
1241                 return IRC_WriteStrClientPrefix(target, from,
1242                                                 "WHOIS %s :%s",
1243                                                 Req->argv[0], Req->argv[1]);
1244
1245         is_remote = Client_Conn(from) < 0;
1246         strlcpy(mask, Req->argv[Req->argc - 1], sizeof(mask));
1247         for (query = strtok(ngt_LowerStr(mask), ",");
1248                         query && found < 3;
1249                         query = strtok(NULL, ","), found++)
1250         {
1251                 has_wildcards = query[strcspn(query, "*?")] != 0;
1252                 /*
1253                  * follows ircd 2.10 implementation:
1254                  *  - handle up to 3 targets
1255                  *  - no wildcards for remote clients
1256                  *  - only one wildcard target per local client
1257                  *
1258                  *  Also, at most MAX_RPL_WHOIS matches are returned.
1259                  */
1260                 if (!has_wildcards || is_remote) {
1261                         c = Client_Search(query);
1262                         if (c && Client_Type(c) == CLIENT_USER) {
1263                                 if (!IRC_WHOIS_SendReply(Client, from, c))
1264                                         return DISCONNECTED;
1265                         } else {
1266                                 if (!IRC_WriteStrClient(Client,
1267                                                         ERR_NOSUCHNICK_MSG,
1268                                                         Client_ID(Client),
1269                                                         query))
1270                                         return DISCONNECTED;
1271                         }
1272                         continue;
1273                 }
1274                 if (got_wildcard) {
1275                         /* we already handled one wildcard query */
1276                         if (!IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1277                              Client_ID(Client), query))
1278                                 return DISCONNECTED;
1279                         continue;
1280                 }
1281                 got_wildcard = true;
1282                 IRC_SetPenalty(Client, 3);
1283
1284                 for (c = Client_First(); c; c = Client_Next(c)) {
1285                         if (IRC_CheckListTooBig(Client, match_count,
1286                                             MAX_RPL_WHOIS, "WHOIS"))
1287                                 break;
1288
1289                         if (Client_Type(c) != CLIENT_USER)
1290                                 continue;
1291                         if (!MatchCaseInsensitive(query, Client_ID(c)))
1292                                 continue;
1293                         if (!IRC_WHOIS_SendReply(Client, from, c))
1294                                 return DISCONNECTED;
1295
1296                         match_count++;
1297                 }
1298
1299                 if (match_count == 0)
1300                         IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1301                                            Client_ID(Client),
1302                                            Req->argv[Req->argc - 1]);
1303         }
1304         return IRC_WriteStrClient(from, RPL_ENDOFWHOIS_MSG,
1305                                   Client_ID(from), Req->argv[Req->argc - 1]);
1306 } /* IRC_WHOIS */
1307
1308
1309 static bool
1310 WHOWAS_EntryWrite(CLIENT *prefix, WHOWAS *entry)
1311 {
1312         char t_str[60];
1313
1314         (void)strftime(t_str, sizeof(t_str), "%a %b %d %H:%M:%S %Y",
1315                                         localtime(&entry->time));
1316
1317         if (!IRC_WriteStrClient(prefix, RPL_WHOWASUSER_MSG, Client_ID(prefix),
1318                         entry->id, entry->user, entry->host, entry->info))
1319                                 return DISCONNECTED;
1320
1321         return IRC_WriteStrClient(prefix, RPL_WHOISSERVER_MSG, Client_ID(prefix),
1322                   entry->id, entry->server, t_str);
1323 }
1324
1325 /**
1326  * IRC "WHOWAS" function.
1327  * This function implements the IRC command "WHOWHAS". It handles local
1328  * requests and request that should be forwarded to other servers.
1329  */
1330 GLOBAL bool
1331 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
1332 {
1333         CLIENT *target, *prefix;
1334         WHOWAS *whowas;
1335         char tok_buf[COMMAND_LEN];
1336         int max, last, count, i, nc;
1337         const char *nick;
1338
1339         assert( Client != NULL );
1340         assert( Req != NULL );
1341
1342         /* Do not reveal any info on disconnected users? */
1343         if (Conf_MorePrivacy)
1344                 return CONNECTED;
1345
1346         /* Wrong number of parameters? */
1347         if (Req->argc > 3)
1348                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
1349                                         Client_ID(Client), Req->command);
1350         if (Req->argc < 1)
1351                 return IRC_WriteStrClient(Client, ERR_NONICKNAMEGIVEN_MSG, Client_ID(Client));
1352
1353         /* Search target */
1354         if (Req->argc == 3)
1355                 target = Client_Search(Req->argv[2]);
1356         else
1357                 target = Client_ThisServer();
1358
1359         /* Get prefix */
1360         if (Client_Type(Client) == CLIENT_SERVER)
1361                 prefix = Client_Search(Req->prefix);
1362         else
1363                 prefix = Client;
1364
1365         if (!prefix)
1366                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
1367                                                 Client_ID(Client), Req->prefix);
1368
1369         /* Forward to other server? */
1370         if (target != Client_ThisServer()) {
1371                 if (!target || (Client_Type(target) != CLIENT_SERVER))
1372                         return IRC_WriteStrClient(prefix, ERR_NOSUCHSERVER_MSG,
1373                                         Client_ID(prefix), Req->argv[2]);
1374
1375                 /* Forward */
1376                 IRC_WriteStrClientPrefix( target, prefix, "WHOWAS %s %s %s",
1377                                           Req->argv[0], Req->argv[1],
1378                                           Req->argv[2] );
1379                 return CONNECTED;
1380         }
1381
1382         whowas = Client_GetWhowas( );
1383         last = Client_GetLastWhowasIndex( );
1384         if (last < 0)
1385                 last = 0;
1386
1387         max = DEF_RPL_WHOWAS;
1388         if (Req->argc > 1) {
1389                 max = atoi(Req->argv[1]);
1390                 if (max < 1)
1391                         max = MAX_RPL_WHOWAS;
1392         }
1393
1394         /*
1395          * Break up the nick argument into a list of nicks, if applicable
1396          * Can't modify Req->argv[0] because we need it for RPL_ENDOFWHOWAS_MSG.
1397          */
1398         strlcpy(tok_buf, Req->argv[0], sizeof(tok_buf));
1399         nick = strtok(tok_buf, ",");
1400
1401         for (i=last, count=0; nick != NULL ; nick = strtok(NULL, ",")) {
1402                 nc = 0;
1403                 do {
1404                         /* Used entry? */
1405                         if (whowas[i].time > 0 && strcasecmp(nick, whowas[i].id) == 0) {
1406                                 if (!WHOWAS_EntryWrite(prefix, &whowas[i]))
1407                                         return DISCONNECTED;
1408                                 nc++;
1409                                 count++;
1410                         }
1411                         /* previous entry */
1412                         i--;
1413
1414                         /* "underflow", wrap around */
1415                         if (i < 0)
1416                                 i = MAX_WHOWAS - 1;
1417
1418                         if (nc && count >= max)
1419                                 break;
1420                 } while (i != last);
1421
1422                 if (nc == 0 && !IRC_WriteStrClient(prefix, ERR_WASNOSUCHNICK_MSG,
1423                                                 Client_ID(prefix), nick))
1424                         return DISCONNECTED;
1425         }
1426         return IRC_WriteStrClient(prefix, RPL_ENDOFWHOWAS_MSG, Client_ID(prefix), Req->argv[0]);
1427 } /* IRC_WHOWAS */
1428
1429
1430 /**
1431  * Send LUSERS reply to a client.
1432  *
1433  * @param Client The receipient of the information.
1434  * @return CONNECTED or DISCONNECTED.
1435  */
1436 GLOBAL bool
1437 IRC_Send_LUSERS(CLIENT *Client)
1438 {
1439         unsigned long cnt;
1440 #ifndef STRICT_RFC
1441         unsigned long max;
1442 #endif
1443
1444         assert(Client != NULL);
1445
1446         /* Users, services and serevers in the network */
1447         if (!IRC_WriteStrClient(Client, RPL_LUSERCLIENT_MSG, Client_ID(Client),
1448                                 Client_UserCount(), Client_ServiceCount(),
1449                                 Client_ServerCount()))
1450                 return DISCONNECTED;
1451
1452         /* Number of IRC operators */
1453         cnt = Client_OperCount( );
1454         if (cnt > 0) {
1455                 if (!IRC_WriteStrClient(Client, RPL_LUSEROP_MSG,
1456                                         Client_ID(Client), cnt))
1457                         return DISCONNECTED;
1458         }
1459
1460         /* Unknown connections */
1461         cnt = Client_UnknownCount( );
1462         if (cnt > 0) {
1463                 if (!IRC_WriteStrClient(Client, RPL_LUSERUNKNOWN_MSG,
1464                                         Client_ID(Client), cnt))
1465                         return DISCONNECTED;
1466         }
1467
1468         /* Number of created channels */
1469         if (!IRC_WriteStrClient(Client, RPL_LUSERCHANNELS_MSG,
1470                                 Client_ID(Client),
1471                                 Channel_CountVisible(Client)))
1472                 return DISCONNECTED;
1473
1474         /* Number of local users, services and servers */
1475         if (!IRC_WriteStrClient(Client, RPL_LUSERME_MSG, Client_ID(Client),
1476                                 Client_MyUserCount(), Client_MyServiceCount(),
1477                                 Client_MyServerCount()))
1478                 return DISCONNECTED;
1479
1480 #ifndef STRICT_RFC
1481         /* Maximum number of local users */
1482         cnt = Client_MyUserCount();
1483         max = Client_MyMaxUserCount();
1484         if (! IRC_WriteStrClient(Client, RPL_LOCALUSERS_MSG, Client_ID(Client),
1485                         cnt, max, cnt, max))
1486                 return DISCONNECTED;
1487         /* Maximum number of users in the network */
1488         cnt = Client_UserCount();
1489         max = Client_MaxUserCount();
1490         if(! IRC_WriteStrClient(Client, RPL_NETUSERS_MSG, Client_ID(Client),
1491                         cnt, max, cnt, max))
1492                 return DISCONNECTED;
1493         /* Connection counters */
1494         if (! IRC_WriteStrClient(Client, RPL_STATSCONN_MSG, Client_ID(Client),
1495                         Conn_CountMax(), Conn_CountAccepted()))
1496                 return DISCONNECTED;
1497 #endif
1498
1499         return CONNECTED;
1500 } /* IRC_Send_LUSERS */
1501
1502
1503 static bool
1504 Show_MOTD_Start(CLIENT *Client)
1505 {
1506         return IRC_WriteStrClient(Client, RPL_MOTDSTART_MSG,
1507                 Client_ID( Client ), Client_ID( Client_ThisServer( )));
1508 }
1509
1510 static bool
1511 Show_MOTD_Sendline(CLIENT *Client, const char *msg)
1512 {
1513         return IRC_WriteStrClient(Client, RPL_MOTD_MSG, Client_ID( Client ), msg);
1514 }
1515
1516 static bool
1517 Show_MOTD_End(CLIENT *Client)
1518 {
1519         if (!IRC_WriteStrClient(Client, RPL_ENDOFMOTD_MSG, Client_ID(Client)))
1520                 return DISCONNECTED;
1521
1522         if (*Conf_CloakHost)
1523                 return IRC_WriteStrClient(Client, RPL_HOSTHIDDEN_MSG,
1524                                           Client_ID(Client),
1525                                           Client_Hostname(Client));
1526
1527         return CONNECTED;
1528 }
1529
1530 #ifdef SSL_SUPPORT
1531 static bool Show_MOTD_SSLInfo(CLIENT *Client)
1532 {
1533         bool ret = true;
1534         char buf[COMMAND_LEN] = "Connected using Cipher ";
1535
1536         if (!Conn_GetCipherInfo(Client_Conn(Client), buf + 23, sizeof buf - 23))
1537                 return true;
1538
1539         if (!Show_MOTD_Sendline(Client, buf))
1540                 ret = false;
1541
1542         return ret;
1543 }
1544 #else
1545 static inline bool
1546 Show_MOTD_SSLInfo(UNUSED CLIENT *c)
1547 { return true; }
1548 #endif
1549
1550 GLOBAL bool
1551 IRC_Show_MOTD( CLIENT *Client )
1552 {
1553         const char *line;
1554         size_t len_tot, len_str;
1555
1556         assert( Client != NULL );
1557
1558         len_tot = array_bytes(&Conf_Motd);
1559         if (len_tot == 0 && !Conn_UsesSSL(Client_Conn(Client)))
1560                 return IRC_WriteStrClient(Client, ERR_NOMOTD_MSG, Client_ID(Client));
1561
1562         if (!Show_MOTD_Start(Client))
1563                 return DISCONNECTED;
1564
1565         line = array_start(&Conf_Motd);
1566         while (len_tot > 0) {
1567                 len_str = strlen(line) + 1;
1568
1569                 assert(len_tot >= len_str);
1570                 len_tot -= len_str;
1571
1572                 if (!Show_MOTD_Sendline(Client, line))
1573                         return DISCONNECTED;
1574                 line += len_str;
1575         }
1576
1577         if (!Show_MOTD_SSLInfo(Client))
1578                 return DISCONNECTED;
1579         return Show_MOTD_End(Client);
1580 } /* IRC_Show_MOTD */
1581
1582
1583 /**
1584  * Send NAMES reply for a specific client and channel.
1585  *
1586  * @param Client The client requesting the NAMES information.
1587  * @param Chan The channel
1588  * @return CONNECTED or DISCONNECTED.
1589  */
1590 GLOBAL bool
1591 IRC_Send_NAMES(CLIENT * Client, CHANNEL * Chan)
1592 {
1593         bool is_visible, is_member;
1594         char str[LINE_LEN + 1];
1595         CL2CHAN *cl2chan;
1596         CLIENT *cl;
1597
1598         assert(Client != NULL);
1599         assert(Chan != NULL);
1600
1601         if (Channel_IsMemberOf(Chan, Client))
1602                 is_member = true;
1603         else
1604                 is_member = false;
1605
1606         /* Do not print info on channel memberships to anyone that is not member? */
1607         if (Conf_MorePrivacy && !is_member)
1608                 return CONNECTED;
1609
1610         /* Secret channel? */
1611         if (!is_member && strchr(Channel_Modes(Chan), 's'))
1612                 return CONNECTED;
1613
1614         snprintf(str, sizeof(str), RPL_NAMREPLY_MSG, Client_ID(Client), "=",
1615                  Channel_Name(Chan));
1616         cl2chan = Channel_FirstMember(Chan);
1617         while (cl2chan) {
1618                 cl = Channel_GetClient(cl2chan);
1619
1620                 if (strchr(Client_Modes(cl), 'i'))
1621                         is_visible = false;
1622                 else
1623                         is_visible = true;
1624
1625                 if (is_member || is_visible) {
1626                         if (str[strlen(str) - 1] != ':')
1627                                 strlcat(str, " ", sizeof(str));
1628
1629                         who_flags_qualifier(Client, Channel_UserModes(Chan, cl),
1630                                             str, sizeof(str));
1631                         strlcat(str, Client_ID(cl), sizeof(str));
1632
1633                         if (strlen(str) > (LINE_LEN - CLIENT_NICK_LEN - 4)) {
1634                                 if (!IRC_WriteStrClient(Client, "%s", str))
1635                                         return DISCONNECTED;
1636                                 snprintf(str, sizeof(str), RPL_NAMREPLY_MSG,
1637                                          Client_ID(Client), "=",
1638                                          Channel_Name(Chan));
1639                         }
1640                 }
1641
1642                 cl2chan = Channel_NextMember(Chan, cl2chan);
1643         }
1644         if (str[strlen(str) - 1] != ':') {
1645                 if (!IRC_WriteStrClient(Client, "%s", str))
1646                         return DISCONNECTED;
1647         }
1648
1649         return CONNECTED;
1650 } /* IRC_Send_NAMES */
1651
1652
1653 /**
1654  * Send the ISUPPORT numeric (005).
1655  * This numeric indicates the features that are supported by this server.
1656  * See <http://www.irc.org/tech_docs/005.html> for details.
1657  */
1658 GLOBAL bool
1659 IRC_Send_ISUPPORT(CLIENT * Client)
1660 {
1661         if (!IRC_WriteStrClient(Client, RPL_ISUPPORT1_MSG, Client_ID(Client),
1662                                 Conf_MaxJoins))
1663                 return DISCONNECTED;
1664         return IRC_WriteStrClient(Client, RPL_ISUPPORT2_MSG, Client_ID(Client),
1665                                   CHANNEL_NAME_LEN - 1, Conf_MaxNickLength - 1,
1666                                   COMMAND_LEN - 23, CLIENT_AWAY_LEN - 1,
1667                                   COMMAND_LEN - 113, MAX_HNDL_MODES_ARG,
1668                                   MAX_HNDL_CHANNEL_LISTS);
1669 } /* IRC_Send_ISUPPORT */
1670
1671
1672 /* -eof- */