src/ngircd/irc-info.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2013 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-macros.h"
  42 #include "irc-write.h"
  43 #include "client-cap.h"
  44
  45 #include "exp.h"
  46 #include "irc-info.h"
  47
  48 /* Local functions */
  49
  50 static unsigned int
  51 t_diff(time_t *t, const time_t d)
  52 {
  53         time_t diff, remain;
  54
  55         diff = *t / d;
  56         remain = diff * d;
  57         *t -= remain;
  58
  59         return (unsigned int)diff;
  60 }
  61
  62 static unsigned int
  63 uptime_days(time_t *now)
  64 {
  65         return t_diff(now, 60 * 60 * 24);
  66 }
  67
  68 static unsigned int
  69 uptime_hrs(time_t *now)
  70 {
  71         return t_diff(now, 60 * 60);
  72 }
  73
  74 static unsigned int
  75 uptime_mins(time_t *now)
  76 {
  77         return t_diff(now, 60);
  78 }
  79
  80 static bool
  81 write_whoreply(CLIENT *Client, CLIENT *c, const char *channelname, const char *flags)
  82 {
  83         return IRC_WriteStrClient(Client, RPL_WHOREPLY_MSG, Client_ID(Client),
  84                                   channelname, Client_User(c),
  85                                   Client_HostnameDisplayed(c),
  86                                   Client_ID(Client_Introducer(c)), Client_ID(c),
  87                                   flags, Client_Hops(c), Client_Info(c));
  88 }
  89
  90 /**
  91  * Return channel user mode prefix(es).
  92  *
  93  * @param Client The client requesting the mode prefixes.
  94  * @param chan_user_modes String with channel user modes.
  95  * @param str String buffer to which the prefix(es) will be appended.
  96  * @param len Size of "str" buffer.
  97  * @return Pointer to "str".
  98  */
  99 static char *
 100 who_flags_qualifier(CLIENT *Client, const char *chan_user_modes,
 101                     char *str, size_t len)
 102 {
 103         assert(Client != NULL);
 104
 105         if (Client_Cap(Client) & CLIENT_CAP_MULTI_PREFIX) {
 106                 if (strchr(chan_user_modes, 'q'))
 107                         strlcat(str, "~", len);
 108                 if (strchr(chan_user_modes, 'a'))
 109                         strlcat(str, "&", len);
 110                 if (strchr(chan_user_modes, 'o'))
 111                         strlcat(str, "@", len);
 112                 if (strchr(chan_user_modes, 'h'))
 113                         strlcat(str, "%", len);
 114                 if (strchr(chan_user_modes, 'v'))
 115                         strlcat(str, "+", len);
 116
 117                 return str;
 118         }
 119
 120         if (strchr(chan_user_modes, 'q'))
 121                 strlcat(str, "~", len);
 122         else if (strchr(chan_user_modes, 'a'))
 123                 strlcat(str, "&", len);
 124         else if (strchr(chan_user_modes, 'o'))
 125                 strlcat(str, "@", len);
 126         else if (strchr(chan_user_modes, 'h'))
 127                 strlcat(str, "%", len);
 128         else if (strchr(chan_user_modes, 'v'))
 129                 strlcat(str, "+", len);
 130
 131         return str;
 132 }
 133
 134 /**
 135  * Send WHO reply for a "channel target" ("WHO #channel").
 136  *
 137  * @param Client Client requesting the information.
 138  * @param Chan Channel being requested.
 139  * @param OnlyOps Only display IRC operators.
 140  * @return CONNECTED or DISCONNECTED.
 141  */
 142 static bool
 143 IRC_WHO_Channel(CLIENT *Client, CHANNEL *Chan, bool OnlyOps)
 144 {
 145         bool is_visible, is_member, is_ircop;
 146         CL2CHAN *cl2chan;
 147         char flags[10];
 148         CLIENT *c;
 149         int count = 0;
 150
 151         assert( Client != NULL );
 152         assert( Chan != NULL );
 153
 154         IRC_SetPenalty(Client, 1);
 155
 156         is_member = Channel_IsMemberOf(Chan, Client);
 157
 158         /* Secret channel? */
 159         if (!is_member && Channel_HasMode(Chan, 's'))
 160                 return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG,
 161                                           Client_ID(Client), Channel_Name(Chan));
 162
 163         cl2chan = Channel_FirstMember(Chan);
 164         for (; cl2chan ; cl2chan = Channel_NextMember(Chan, cl2chan)) {
 165                 c = Channel_GetClient(cl2chan);
 166
 167                 is_ircop = Client_HasMode(c, 'o');
 168                 if (OnlyOps && !is_ircop)
 169                         continue;
 170
 171                 is_visible = Client_HasMode(c, 'i');
 172                 if (is_member || is_visible) {
 173                         memset(flags, 0, sizeof(flags));
 174
 175                         if (Client_HasMode(c, 'a'))
 176                                 flags[0] = 'G'; /* away */
 177                         else
 178                                 flags[0] = 'H';
 179
 180                         if (is_ircop)
 181                                 flags[1] = '*';
 182
 183                         who_flags_qualifier(Client, Channel_UserModes(Chan, c),
 184                                             flags, sizeof(flags));
 185
 186                         if (!write_whoreply(Client, c, Channel_Name(Chan),
 187                                             flags))
 188                                 return DISCONNECTED;
 189                         count++;
 190                 }
 191         }
 192
 193         /* If there are a lot of clients, augment penalty a bit */
 194         if (count > MAX_RPL_WHO)
 195                 IRC_SetPenalty(Client, 1);
 196
 197         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 198                                   Channel_Name(Chan));
 199 }
 200
 201 /**
 202  * Send WHO reply for a "mask target" ("WHO m*sk").
 203  *
 204  * @param Client Client requesting the information.
 205  * @param Mask Mask being requested or NULL for "all" clients.
 206  * @param OnlyOps Only display IRC operators.
 207  * @return CONNECTED or DISCONNECTED.
 208  */
 209 static bool
 210 IRC_WHO_Mask(CLIENT *Client, char *Mask, bool OnlyOps)
 211 {
 212         CLIENT *c;
 213         CL2CHAN *cl2chan;
 214         CHANNEL *chan;
 215         bool client_match, is_visible;
 216         char flags[3];
 217         int count = 0;
 218
 219         assert (Client != NULL);
 220
 221         if (Mask)
 222                 ngt_LowerStr(Mask);
 223
 224         IRC_SetPenalty(Client, 3);
 225         for (c = Client_First(); c != NULL; c = Client_Next(c)) {
 226                 if (Client_Type(c) != CLIENT_USER)
 227                         continue;
 228
 229                 if (OnlyOps && !Client_HasMode(c, 'o'))
 230                         continue;
 231
 232                 if (Mask) {
 233                         /* Match pattern against user host/server/name/nick */
 234                         client_match = MatchCaseInsensitive(Mask,
 235                                                             Client_Hostname(c));
 236                         if (!client_match)
 237                                 client_match = MatchCaseInsensitive(Mask,
 238                                                                     Client_ID(Client_Introducer(c)));
 239                         if (!client_match)
 240                                 client_match = MatchCaseInsensitive(Mask,
 241                                                                     Client_Info(c));
 242                         if (!client_match)
 243                                 client_match = MatchCaseInsensitive(Mask,
 244                                                                     Client_ID(c));
 245                         if (!client_match)
 246                                 continue;       /* no match: skip this client */
 247                 }
 248
 249                 is_visible = !Client_HasMode(c, 'i');
 250
 251                 /* Target client is invisible, but mask matches exactly? */
 252                 if (!is_visible && Mask && strcasecmp(Client_ID(c), Mask) == 0)
 253                         is_visible = true;
 254
 255                 /* Target still invisible, but are both on the same channel? */
 256                 if (!is_visible) {
 257                         cl2chan = Channel_FirstChannelOf(Client);
 258                         while (cl2chan && !is_visible) {
 259                                 chan = Channel_GetChannel(cl2chan);
 260                                 if (Channel_IsMemberOf(chan, c))
 261                                         is_visible = true;
 262                                 cl2chan = Channel_NextChannelOf(Client, cl2chan);
 263                         }
 264                 }
 265
 266                 if (!is_visible)        /* target user is not visible */
 267                         continue;
 268
 269                 if (IRC_CheckListTooBig(Client, count, MAX_RPL_WHO, "WHO"))
 270                         break;
 271
 272                 memset(flags, 0, sizeof(flags));
 273
 274                 if (Client_HasMode(c, 'a'))
 275                         flags[0] = 'G'; /* away */
 276                 else
 277                         flags[0] = 'H';
 278
 279                 if (Client_HasMode(c, 'o'))
 280                         flags[1] = '*';
 281
 282                 if (!write_whoreply(Client, c, "*", flags))
 283                         return DISCONNECTED;
 284                 count++;
 285         }
 286
 287         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 288                                   Mask ? Mask : "*");
 289 }
 290
 291 /**
 292  * Generate WHOIS reply of one actual client.
 293  *
 294  * @param Client The client from which this command has been received.
 295  * @param from The client requesting the information ("originator").
 296  * @param c The client of which information should be returned.
 297  * @return CONNECTED or DISCONNECTED.
 298  */
 299 static bool
 300 IRC_WHOIS_SendReply(CLIENT *Client, CLIENT *from, CLIENT *c)
 301 {
 302         char str[COMMAND_LEN];
 303         CL2CHAN *cl2chan;
 304         CHANNEL *chan;
 305
 306         assert(Client != NULL);
 307         assert(from != NULL);
 308         assert(c != NULL);
 309
 310         /* Nick, user, hostname and client info */
 311         if (!IRC_WriteStrClient(from, RPL_WHOISUSER_MSG, Client_ID(from),
 312                                 Client_ID(c), Client_User(c),
 313                                 Client_HostnameDisplayed(c), Client_Info(c)))
 314                 return DISCONNECTED;
 315
 316         /* Server */
 317         if (!IRC_WriteStrClient(from, RPL_WHOISSERVER_MSG, Client_ID(from),
 318                                 Client_ID(c), Client_ID(Client_Introducer(c)),
 319                                 Client_Info(Client_Introducer(c))))
 320                 return DISCONNECTED;
 321
 322         /* Channels */
 323         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
 324                  Client_ID(from), Client_ID(c));
 325         cl2chan = Channel_FirstChannelOf(c);
 326         while (cl2chan) {
 327                 chan = Channel_GetChannel(cl2chan);
 328                 assert(chan != NULL);
 329
 330                 /* next */
 331                 cl2chan = Channel_NextChannelOf(c, cl2chan);
 332
 333                 /* Secret channel? */
 334                 if (Channel_HasMode(chan, 's')
 335                     && !Channel_IsMemberOf(chan, Client))
 336                         continue;
 337
 338                 /* Local channel and request is not from a user? */
 339                 if (Client_Type(Client) == CLIENT_SERVER
 340                     && Channel_IsLocal(chan))
 341                         continue;
 342
 343                 /* Concatenate channel names */
 344                 if (str[strlen(str) - 1] != ':')
 345                         strlcat(str, " ", sizeof(str));
 346
 347                 who_flags_qualifier(Client, Channel_UserModes(chan, c),
 348                                     str, sizeof(str));
 349                 strlcat(str, Channel_Name(chan), sizeof(str));
 350
 351                 if (strlen(str) > (COMMAND_LEN - CHANNEL_NAME_LEN - 4)) {
 352                         /* Line becomes too long: send it! */
 353                         if (!IRC_WriteStrClient(Client, "%s", str))
 354                                 return DISCONNECTED;
 355                         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
 356                                  Client_ID(from), Client_ID(c));
 357                 }
 358         }
 359         if(str[strlen(str) - 1] != ':') {
 360                 /* There is data left to send: */
 361                 if (!IRC_WriteStrClient(Client, "%s", str))
 362                         return DISCONNECTED;
 363         }
 364
 365         /* IRC-Services? */
 366         if (Client_Type(c) == CLIENT_SERVICE &&
 367             !IRC_WriteStrClient(from, RPL_WHOISSERVICE_MSG,
 368                                 Client_ID(from), Client_ID(c)))
 369                 return DISCONNECTED;
 370
 371         /* IRC-Operator? */
 372         if (Client_Type(c) != CLIENT_SERVICE &&
 373             Client_HasMode(c, 'o') &&
 374             !IRC_WriteStrClient(from, RPL_WHOISOPERATOR_MSG,
 375                                 Client_ID(from), Client_ID(c)))
 376                 return DISCONNECTED;
 377
 378         /* IRC-Bot? */
 379         if (Client_HasMode(c, 'B') &&
 380             !IRC_WriteStrClient(from, RPL_WHOISBOT_MSG,
 381                                 Client_ID(from), Client_ID(c)))
 382                 return DISCONNECTED;
 383
 384         /* Connected using SSL? */
 385         if (Conn_UsesSSL(Client_Conn(c))) {
 386                 if (!IRC_WriteStrClient(from, RPL_WHOISSSL_MSG, Client_ID(from),
 387                                         Client_ID(c)))
 388                         return DISCONNECTED;
 389
 390                 /* Certificate fingerprint? */
 391                 if (Conn_GetCertFp(Client_Conn(c)) &&
 392                     from == c &&
 393                     !IRC_WriteStrClient(from, RPL_WHOISCERTFP_MSG,
 394                                         Client_ID(from), Client_ID(c),
 395                                         Conn_GetCertFp(Client_Conn(c))))
 396                         return DISCONNECTED;
 397         }
 398
 399         /* Registered nickname? */
 400         if (Client_HasMode(c, 'R') &&
 401             !IRC_WriteStrClient(from, RPL_WHOISREGNICK_MSG,
 402                                 Client_ID(from), Client_ID(c)))
 403                 return DISCONNECTED;
 404
 405         /* Local client and requester is the user itself or an IRC Op? */
 406         if (Client_Conn(c) > NONE &&
 407             (from == c || (!Conf_MorePrivacy && Client_HasMode(from, 'o')))) {
 408                 /* Client hostname */
 409                 if (!IRC_WriteStrClient(from, RPL_WHOISHOST_MSG,
 410                                         Client_ID(from), Client_ID(c),
 411                                         Client_Hostname(c), Client_IPAText(c)))
 412                         return DISCONNECTED;
 413                 /* Client modes */
 414                 if (!IRC_WriteStrClient(from, RPL_WHOISMODES_MSG,
 415                                         Client_ID(from), Client_ID(c), Client_Modes(c)))
 416                         return DISCONNECTED;
 417         }
 418
 419         /* Idle and signon time (local clients only!) */
 420         if (!Conf_MorePrivacy && Client_Conn(c) > NONE &&
 421             !IRC_WriteStrClient(from, RPL_WHOISIDLE_MSG,
 422                                 Client_ID(from), Client_ID(c),
 423                                 (unsigned long)Conn_GetIdle(Client_Conn(c)),
 424                                 (unsigned long)Conn_GetSignon(Client_Conn(c))))
 425                 return DISCONNECTED;
 426
 427         /* Away? */
 428         if (Client_HasMode(c, 'a') &&
 429             !IRC_WriteStrClient(from, RPL_AWAY_MSG,
 430                                 Client_ID(from), Client_ID(c), Client_Away(c)))
 431                 return DISCONNECTED;
 432
 433         return CONNECTED;
 434 }
 435
 436 static bool
 437 WHOWAS_EntryWrite(CLIENT *prefix, WHOWAS *entry)
 438 {
 439         char t_str[60];
 440
 441         (void)strftime(t_str, sizeof(t_str), "%a %b %d %H:%M:%S %Y",
 442                        localtime(&entry->time));
 443
 444         if (!IRC_WriteStrClient(prefix, RPL_WHOWASUSER_MSG, Client_ID(prefix),
 445                                 entry->id, entry->user, entry->host, entry->info))
 446                 return DISCONNECTED;
 447
 448         return IRC_WriteStrClient(prefix, RPL_WHOISSERVER_MSG, Client_ID(prefix),
 449                                   entry->id, entry->server, t_str);
 450 }
 451
 452 #ifdef SSL_SUPPORT
 453 static bool
 454 Show_MOTD_SSLInfo(CLIENT *Client)
 455 {
 456         char buf[COMMAND_LEN];
 457         char c_str[128];
 458
 459         if (Conn_GetCipherInfo(Client_Conn(Client), c_str, sizeof(c_str))) {
 460                 snprintf(buf, sizeof(buf), "Connected using Cipher %s", c_str);
 461                 if (!IRC_WriteStrClient(Client, RPL_MOTD_MSG,
 462                                         Client_ID(Client), buf))
 463                         return false;
 464         }
 465
 466         if (Conn_GetCertFp(Client_Conn(Client))) {
 467                 snprintf(buf, sizeof(buf),
 468                          "Your client certificate fingerprint is: %s",
 469                          Conn_GetCertFp(Client_Conn(Client)));
 470                 if (!IRC_WriteStrClient(Client, RPL_MOTD_MSG,
 471                                         Client_ID(Client), buf))
 472                         return false;
 473         }
 474
 475         return true;
 476 }
 477 #else
 478 static bool
 479 Show_MOTD_SSLInfo(UNUSED CLIENT *c)
 480 {
 481         return true;
 482 }
 483 #endif
 484
 485 /* Global functions */
 486
 487 /**
 488  * Handler for the IRC command "ADMIN".
 489  *
 490  * @param Client The client from which this command has been received.
 491  * @param Req Request structure with prefix and all parameters.
 492  * @return CONNECTED or DISCONNECTED.
 493  */
 494 GLOBAL bool
 495 IRC_ADMIN(CLIENT *Client, REQUEST *Req )
 496 {
 497         CLIENT *target, *prefix;
 498
 499         assert( Client != NULL );
 500         assert( Req != NULL );
 501
 502         IRC_SetPenalty(Client, 1);
 503
 504         _IRC_GET_SENDER_OR_RETURN_(prefix, Req, Client)
 505         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, prefix)
 506
 507         /* Forward? */
 508         if(target != Client_ThisServer()) {
 509                 IRC_WriteStrClientPrefix(target, prefix,
 510                                          "ADMIN %s", Client_ID(target));
 511                 return CONNECTED;
 512         }
 513
 514         if (!IRC_WriteStrClient(Client, RPL_ADMINME_MSG, Client_ID(prefix),
 515                                 Conf_ServerName))
 516                 return DISCONNECTED;
 517         if (!IRC_WriteStrClient(Client, RPL_ADMINLOC1_MSG, Client_ID(prefix),
 518                                 Conf_ServerAdmin1))
 519                 return DISCONNECTED;
 520         if (!IRC_WriteStrClient(Client, RPL_ADMINLOC2_MSG, Client_ID(prefix),
 521                                 Conf_ServerAdmin2))
 522                 return DISCONNECTED;
 523         if (!IRC_WriteStrClient(Client, RPL_ADMINEMAIL_MSG, Client_ID(prefix),
 524                                 Conf_ServerAdminMail))
 525                 return DISCONNECTED;
 526
 527         return CONNECTED;
 528 } /* IRC_ADMIN */
 529
 530 /**
 531  * Handler for the IRC command "INFO".
 532  *
 533  * @param Client The client from which this command has been received.
 534  * @param Req Request structure with prefix and all parameters.
 535  * @return CONNECTED or DISCONNECTED.
 536  */
 537 GLOBAL bool
 538 IRC_INFO(CLIENT * Client, REQUEST * Req)
 539 {
 540         CLIENT *target, *prefix;
 541         char msg[510];
 542
 543         assert(Client != NULL);
 544         assert(Req != NULL);
 545
 546         IRC_SetPenalty(Client, 2);
 547
 548         _IRC_GET_SENDER_OR_RETURN_(prefix, Req, Client)
 549         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, prefix)
 550
 551         /* Forward? */
 552         if (target != Client_ThisServer()) {
 553                 IRC_WriteStrClientPrefix(target, prefix, "INFO %s",
 554                                          Client_ID(target));
 555                 return CONNECTED;
 556         }
 557
 558         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix),
 559                                 NGIRCd_Version))
 560                 return DISCONNECTED;
 561
 562 #if defined(__DATE__) && defined(__TIME__)
 563         snprintf(msg, sizeof(msg), "Birth Date: %s at %s", __DATE__, __TIME__);
 564         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 565                 return DISCONNECTED;
 566 #endif
 567
 568         strlcpy(msg, "On-line since ", sizeof(msg));
 569         strlcat(msg, NGIRCd_StartStr, sizeof(msg));
 570         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 571                 return DISCONNECTED;
 572
 573         if (!IRC_WriteStrClient(Client, RPL_ENDOFINFO_MSG, Client_ID(prefix)))
 574                 return DISCONNECTED;
 575
 576         return CONNECTED;
 577 } /* IRC_INFO */
 578
 579 /**
 580  * Handler for the IRC "ISON" command.
 581  *
 582  * @param Client The client from which this command has been received.
 583  * @param Req Request structure with prefix and all parameters.
 584  * @return CONNECTED or DISCONNECTED.
 585  */
 586 GLOBAL bool
 587 IRC_ISON( CLIENT *Client, REQUEST *Req )
 588 {
 589         char rpl[COMMAND_LEN];
 590         CLIENT *c;
 591         char *ptr;
 592         int i;
 593
 594         assert(Client != NULL);
 595         assert(Req != NULL);
 596
 597         strlcpy(rpl, RPL_ISON_MSG, sizeof rpl);
 598         for (i = 0; i < Req->argc; i++) {
 599                 /* "All" ircd even parse ":<x> <y> ..." arguments and split
 600                  * them up; so we do the same ... */
 601                 ptr = strtok(Req->argv[i], " ");
 602                 while (ptr) {
 603                         ngt_TrimStr(ptr);
 604                         c = Client_Search(ptr);
 605                         if (c && Client_Type(c) == CLIENT_USER) {
 606                                 strlcat(rpl, Client_ID(c), sizeof(rpl));
 607                                 strlcat(rpl, " ", sizeof(rpl));
 608                         }
 609                         ptr = strtok(NULL, " ");
 610                 }
 611         }
 612         ngt_TrimLastChr(rpl, ' ');
 613
 614         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 615 } /* IRC_ISON */
 616
 617 /**
 618  * Handler for the IRC "LINKS" command.
 619  *
 620  * @param Client The client from which this command has been received.
 621  * @param Req Request structure with prefix and all parameters.
 622  * @return CONNECTED or DISCONNECTED.
 623  */
 624 GLOBAL bool
 625 IRC_LINKS(CLIENT *Client, REQUEST *Req)
 626 {
 627         CLIENT *target, *from, *c;
 628         char *mask;
 629
 630         assert(Client != NULL);
 631         assert(Req != NULL);
 632
 633         IRC_SetPenalty(Client, 1);
 634
 635         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 636
 637         /* Get pointer to server mask or "*", if none given */
 638         if (Req->argc > 0)
 639                 mask = Req->argv[Req->argc - 1];
 640         else
 641                 mask = "*";
 642
 643         /* Forward? */
 644         if (Req->argc == 2) {
 645                 _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from)
 646                 if (target != Client_ThisServer()) {
 647                         IRC_WriteStrClientPrefix(target, from,
 648                                         "LINKS %s %s", Client_ID(target),
 649                                         Req->argv[1]);
 650                         return CONNECTED;
 651                 }
 652         }
 653
 654         c = Client_First();
 655         while (c) {
 656                 if (Client_Type(c) == CLIENT_SERVER
 657                     && MatchCaseInsensitive(mask, Client_ID(c))) {
 658                         if (!IRC_WriteStrClient(from, RPL_LINKS_MSG,
 659                                         Client_ID(from), Client_ID(c),
 660                                         Client_ID(Client_TopServer(c)
 661                                                   ? Client_TopServer(c)
 662                                                   : Client_ThisServer()),
 663                                         Client_Hops(c), Client_Info(c)))
 664                                 return DISCONNECTED;
 665                 }
 666                 c = Client_Next(c);
 667         }
 668         return IRC_WriteStrClient(from, RPL_ENDOFLINKS_MSG,
 669                                   Client_ID(from), mask);
 670 } /* IRC_LINKS */
 671
 672 /**
 673  * Handler for the IRC "LUSERS" command.
 674  *
 675  * @param Client The client from which this command has been received.
 676  * @param Req Request structure with prefix and all parameters.
 677  * @return CONNECTED or DISCONNECTED.
 678  */
 679 GLOBAL bool
 680 IRC_LUSERS( CLIENT *Client, REQUEST *Req )
 681 {
 682         CLIENT *target, *from;
 683
 684         assert( Client != NULL );
 685         assert( Req != NULL );
 686
 687         IRC_SetPenalty(Client, 1);
 688
 689         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 690         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 1, from)
 691
 692         /* Forward? */
 693         if (target != Client_ThisServer()) {
 694                 IRC_WriteStrClientPrefix(target, from,
 695                                          "LUSERS %s %s", Req->argv[0],
 696                                          Client_ID(target));
 697                 return CONNECTED;
 698         }
 699
 700         return IRC_Send_LUSERS(from);
 701 } /* IRC_LUSERS */
 702
 703 /**
 704  * Handler for the IRC command "SERVLIST".
 705  *
 706  * @param Client The client from which this command has been received.
 707  * @param Req Request structure with prefix and all parameters.
 708  * @return CONNECTED or DISCONNECTED.
 709  */
 710 GLOBAL bool
 711 IRC_SERVLIST(CLIENT *Client, REQUEST *Req)
 712 {
 713         CLIENT *c;
 714
 715         assert(Client != NULL);
 716         assert(Req != NULL);
 717
 718         IRC_SetPenalty(Client, 1);
 719
 720         if (Req->argc < 2 || strcmp(Req->argv[1], "0") == 0) {
 721                 for (c = Client_First(); c!= NULL; c = Client_Next(c)) {
 722                         if (Client_Type(c) != CLIENT_SERVICE)
 723                                 continue;
 724                         if (Req->argc > 0 && !MatchCaseInsensitive(Req->argv[0],
 725                                                                   Client_ID(c)))
 726                                 continue;
 727                         if (!IRC_WriteStrClient(Client, RPL_SERVLIST_MSG,
 728                                         Client_ID(Client), Client_Mask(c),
 729                                         Client_Mask(Client_Introducer(c)), "*",
 730                                         0, Client_Hops(c), Client_Info(c)))
 731                                 return DISCONNECTED;
 732                 }
 733         }
 734
 735         return IRC_WriteStrClient(Client, RPL_SERVLISTEND_MSG, Client_ID(Client),
 736                                   Req->argc > 0 ? Req->argv[0] : "*",
 737                                   Req->argc > 1 ? Req->argv[1] : "0");
 738 } /* IRC_SERVLIST */
 739
 740 /**
 741  * Handler for the IRC command "MOTD".
 742  *
 743  * @param Client The client from which this command has been received.
 744  * @param Req Request structure with prefix and all parameters.
 745  * @return CONNECTED or DISCONNECTED.
 746  */
 747 GLOBAL bool
 748 IRC_MOTD( CLIENT *Client, REQUEST *Req )
 749 {
 750         CLIENT *from, *target;
 751
 752         assert( Client != NULL );
 753         assert( Req != NULL );
 754
 755         IRC_SetPenalty(Client, 3);
 756
 757         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 758         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from)
 759
 760         /* Forward? */
 761         if (target != Client_ThisServer()) {
 762                 IRC_WriteStrClientPrefix(target, from, "MOTD %s",
 763                                          Client_ID(target));
 764                 return CONNECTED;
 765         }
 766
 767         return IRC_Show_MOTD(from);
 768 } /* IRC_MOTD */
 769
 770 /**
 771  * Handler for the IRC command "NAMES".
 772  *
 773  * @param Client The client from which this command has been received.
 774  * @param Req Request structure with prefix and all parameters.
 775  * @return CONNECTED or DISCONNECTED.
 776  */
 777 GLOBAL bool
 778 IRC_NAMES( CLIENT *Client, REQUEST *Req )
 779 {
 780         char rpl[COMMAND_LEN], *ptr;
 781         CLIENT *target, *from, *c;
 782         CHANNEL *chan;
 783
 784         assert( Client != NULL );
 785         assert( Req != NULL );
 786
 787         IRC_SetPenalty(Client, 1);
 788
 789         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 790         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 1, from)
 791
 792         /* Forward? */
 793         if (target != Client_ThisServer()) {
 794                 IRC_WriteStrClientPrefix(target, from, "NAMES %s :%s",
 795                                          Req->argv[0], Client_ID(target));
 796                 return CONNECTED;
 797         }
 798
 799         if (Req->argc > 0) {
 800                 /* Return NAMES list for specific channels */
 801                 ptr = strtok(Req->argv[0], ",");
 802                 while(ptr) {
 803                         chan = Channel_Search(ptr);
 804                         if (chan && !IRC_Send_NAMES(from, chan))
 805                                 return DISCONNECTED;
 806                         if (!IRC_WriteStrClient(from, RPL_ENDOFNAMES_MSG,
 807                                                 Client_ID(from), ptr))
 808                                 return DISCONNECTED;
 809                         ptr = strtok( NULL, "," );
 810                 }
 811                 return CONNECTED;
 812         }
 813
 814         chan = Channel_First();
 815         while (chan) {
 816                 if (!IRC_Send_NAMES(from, chan))
 817                         return DISCONNECTED;
 818                 chan = Channel_Next(chan);
 819         }
 820
 821         /* Now print all clients which are not in any channel */
 822         c = Client_First();
 823         snprintf(rpl, sizeof(rpl), RPL_NAMREPLY_MSG, Client_ID(from), "*", "*");
 824         while (c) {
 825                 if (Client_Type(c) == CLIENT_USER
 826                     && Channel_FirstChannelOf(c) == NULL
 827                     && !Client_HasMode(c, 'i'))
 828                 {
 829                         /* its a user, concatenate ... */
 830                         if (rpl[strlen(rpl) - 1] != ':')
 831                                 strlcat(rpl, " ", sizeof(rpl));
 832                         strlcat(rpl, Client_ID(c), sizeof(rpl));
 833
 834                         if (strlen(rpl) > COMMAND_LEN - CLIENT_NICK_LEN - 4) {
 835                                 /* Line is gwoing too long, send now */
 836                                 if (!IRC_WriteStrClient(from, "%s", rpl))
 837                                         return DISCONNECTED;
 838                                 snprintf(rpl, sizeof(rpl), RPL_NAMREPLY_MSG,
 839                                          Client_ID(from), "*", "*");
 840                         }
 841                 }
 842                 c = Client_Next(c);
 843         }
 844         if (rpl[strlen(rpl) - 1] != ':' && !IRC_WriteStrClient(from, "%s", rpl))
 845                 return DISCONNECTED;
 846
 847         return IRC_WriteStrClient(from, RPL_ENDOFNAMES_MSG, Client_ID(from), "*");
 848 } /* IRC_NAMES */
 849
 850 /**
 851  * Handler for the IRC command "STATS".
 852  *
 853  * @param Client The client from which this command has been received.
 854  * @param Req Request structure with prefix and all parameters.
 855  * @return CONNECTED or DISCONNECTED.
 856  */
 857 GLOBAL bool
 858 IRC_STATS( CLIENT *Client, REQUEST *Req )
 859 {
 860         CLIENT *from, *target, *cl;
 861         CONN_ID con;
 862         char query;
 863         COMMAND *cmd;
 864         time_t time_now;
 865         unsigned int days, hrs, mins;
 866         struct list_head *list;
 867         struct list_elem *list_item;
 868
 869         assert(Client != NULL);
 870         assert(Req != NULL);
 871
 872         IRC_SetPenalty(Client, 2);
 873
 874         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 875         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 1, from)
 876
 877         /* Forward? */
 878         if (target != Client_ThisServer()) {
 879                 IRC_WriteStrClientPrefix(target, from, "STATS %s %s",
 880                                          Req->argv[0], Client_ID(target));
 881                 return CONNECTED;
 882         }
 883
 884         if (Req->argc > 0)
 885                 query = Req->argv[0][0] ? Req->argv[0][0] : '*';
 886         else
 887                 query = '*';
 888
 889         switch (query) {
 890         case 'g':       /* Network-wide bans ("G-Lines") */
 891         case 'G':
 892         case 'k':       /* Server-local bans ("K-Lines") */
 893         case 'K':
 894                 if (!Client_HasMode(from, 'o'))
 895                     return IRC_WriteErrClient(from, ERR_NOPRIVILEGES_MSG,
 896                                               Client_ID(from));
 897                 if (query == 'g' || query == 'G')
 898                         list = Class_GetList(CLASS_GLINE);
 899                 else
 900                         list = Class_GetList(CLASS_KLINE);
 901                         list_item = Lists_GetFirst(list);
 902                         while (list_item) {
 903                                 if (!IRC_WriteStrClient(from, RPL_STATSXLINE_MSG,
 904                                                 Client_ID(from), query,
 905                                                 Lists_GetMask(list_item),
 906                                                 Lists_GetValidity(list_item),
 907                                                 Lists_GetReason(list_item)))
 908                                         return DISCONNECTED;
 909                                 list_item = Lists_GetNext(list_item);
 910                         }
 911                 break;
 912         case 'l':       /* Link status (servers and own link) */
 913         case 'L':
 914                 time_now = time(NULL);
 915                 for (con = Conn_First(); con != NONE; con = Conn_Next(con)) {
 916                         cl = Conn_GetClient(con);
 917                         if (!cl)
 918                                 continue;
 919                         if ((Client_Type(cl) == CLIENT_SERVER)
 920                             || (cl == Client)) {
 921                                 /* Server link or our own connection */
 922 #ifdef ZLIB
 923                                 if (Conn_Options(con) & CONN_ZIP) {
 924                                         if (!IRC_WriteStrClient
 925                                             (from, RPL_STATSLINKINFOZIP_MSG,
 926                                              Client_ID(from), Client_Mask(cl),
 927                                              Conn_SendQ(con), Conn_SendMsg(con),
 928                                              Zip_SendBytes(con),
 929                                              Conn_SendBytes(con),
 930                                              Conn_RecvMsg(con),
 931                                              Zip_RecvBytes(con),
 932                                              Conn_RecvBytes(con),
 933                                              (long)(time_now - Conn_StartTime(con))))
 934                                                 return DISCONNECTED;
 935                                         continue;
 936                                 }
 937 #endif
 938                                 if (!IRC_WriteStrClient
 939                                     (from, RPL_STATSLINKINFO_MSG,
 940                                      Client_ID(from), Client_Mask(cl),
 941                                      Conn_SendQ(con), Conn_SendMsg(con),
 942                                      Conn_SendBytes(con), Conn_RecvMsg(con),
 943                                      Conn_RecvBytes(con),
 944                                      (long)(time_now - Conn_StartTime(con))))
 945                                         return DISCONNECTED;
 946                         }
 947                 }
 948                 break;
 949         case 'm':       /* IRC command status (usage count) */
 950         case 'M':
 951                 cmd = Parse_GetCommandStruct();
 952                 for (; cmd->name; cmd++) {
 953                         if (cmd->lcount == 0 && cmd->rcount == 0)
 954                                 continue;
 955                         if (!IRC_WriteStrClient
 956                             (from, RPL_STATSCOMMANDS_MSG, Client_ID(from),
 957                              cmd->name, cmd->lcount, cmd->bytes, cmd->rcount))
 958                                 return DISCONNECTED;
 959                 }
 960                 break;
 961         case 'u':       /* Server uptime */
 962         case 'U':
 963                 time_now = time(NULL) - NGIRCd_Start;
 964                 days = uptime_days(&time_now);
 965                 hrs = uptime_hrs(&time_now);
 966                 mins = uptime_mins(&time_now);
 967                 if (!IRC_WriteStrClient(from, RPL_STATSUPTIME, Client_ID(from),
 968                                        days, hrs, mins, (unsigned int)time_now))
 969                         return DISCONNECTED;
 970                 break;
 971         }
 972
 973         return IRC_WriteStrClient(from, RPL_ENDOFSTATS_MSG,
 974                                   Client_ID(from), query);
 975 } /* IRC_STATS */
 976
 977 /**
 978  * Handler for the IRC command "SUMMON".
 979  *
 980  * @param Client The client from which this command has been received.
 981  * @param Req Request structure with prefix and all parameters.
 982  * @return CONNECTED or DISCONNECTED.
 983  */
 984 GLOBAL bool
 985 IRC_SUMMON(CLIENT * Client, UNUSED REQUEST * Req)
 986 {
 987         assert(Client != NULL);
 988
 989         return IRC_WriteErrClient(Client, ERR_SUMMONDISABLED_MSG,
 990                                   Client_ID(Client));
 991 } /* IRC_SUMMON */
 992
 993 /**
 994  * Handler for the IRC command "TIME".
 995  *
 996  * @param Client The client from which this command has been received.
 997  * @param Req Request structure with prefix and all parameters.
 998  * @return CONNECTED or DISCONNECTED.
 999  */
1000 GLOBAL bool
1001 IRC_TIME( CLIENT *Client, REQUEST *Req )
1002 {
1003         CLIENT *from, *target;
1004         char t_str[64];
1005         time_t t;
1006
1007         assert(Client != NULL);
1008         assert(Req != NULL);
1009
1010         IRC_SetPenalty(Client, 1);
1011
1012         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
1013         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from)
1014
1015         /* Forward? */
1016         if (target != Client_ThisServer()) {
1017                 IRC_WriteStrClientPrefix(target, from, "TIME %s",
1018                                          Client_ID(target));
1019                 return CONNECTED;
1020         }
1021
1022         t = time( NULL );
1023         (void)strftime(t_str, 60, "%A %B %d %Y -- %H:%M %Z", localtime(&t));
1024         return IRC_WriteStrClient(from, RPL_TIME_MSG, Client_ID(from),
1025                                   Client_ID(Client_ThisServer()), t_str);
1026 } /* IRC_TIME */
1027
1028 /**
1029  * Handler for the IRC command "USERHOST".
1030  *
1031  * @param Client The client from which this command has been received.
1032  * @param Req Request structure with prefix and all parameters.
1033  * @return CONNECTED or DISCONNECTED.
1034  */
1035 GLOBAL bool
1036 IRC_USERHOST(CLIENT *Client, REQUEST *Req)
1037 {
1038         char rpl[COMMAND_LEN];
1039         CLIENT *c;
1040         int max, i;
1041
1042         assert(Client != NULL);
1043         assert(Req != NULL);
1044
1045         IRC_SetPenalty(Client, 1);
1046
1047         if (Req->argc > 5)
1048                 max = 5;
1049         else
1050                 max = Req->argc;
1051
1052         strlcpy(rpl, RPL_USERHOST_MSG, sizeof rpl);
1053         for (i = 0; i < max; i++) {
1054                 c = Client_Search(Req->argv[i]);
1055                 if (c && (Client_Type(c) == CLIENT_USER)) {
1056                         /* This Nick is "online" */
1057                         strlcat(rpl, Client_ID(c), sizeof(rpl));
1058                         if (Client_HasMode(c, 'o'))
1059                                 strlcat(rpl, "*", sizeof(rpl));
1060                         strlcat(rpl, "=", sizeof(rpl));
1061                         if (Client_HasMode(c, 'a'))
1062                                 strlcat(rpl, "-", sizeof(rpl));
1063                         else
1064                                 strlcat(rpl, "+", sizeof(rpl));
1065                         strlcat(rpl, Client_User(c), sizeof(rpl));
1066                         strlcat(rpl, "@", sizeof(rpl));
1067                         strlcat(rpl, Client_HostnameDisplayed(c), sizeof(rpl));
1068                         strlcat(rpl, " ", sizeof(rpl));
1069                 }
1070         }
1071         ngt_TrimLastChr(rpl, ' ');
1072
1073         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
1074 } /* IRC_USERHOST */
1075
1076 /**
1077  * Handler for the IRC command "USERS".
1078  *
1079  * @param Client The client from which this command has been received.
1080  * @param Req Request structure with prefix and all parameters.
1081  * @return CONNECTED or DISCONNECTED.
1082  */
1083 GLOBAL bool
1084 IRC_USERS(CLIENT * Client, UNUSED REQUEST * Req)
1085 {
1086         assert(Client != NULL);
1087
1088         return IRC_WriteErrClient(Client, ERR_USERSDISABLED_MSG,
1089                                   Client_ID(Client));
1090 } /* IRC_USERS */
1091
1092 /**
1093  * Handler for the IRC command "VERSION".
1094  *
1095  * @param Client The client from which this command has been received.
1096  * @param Req Request structure with prefix and all parameters.
1097  * @return CONNECTED or DISCONNECTED.
1098  */
1099 GLOBAL bool
1100 IRC_VERSION( CLIENT *Client, REQUEST *Req )
1101 {
1102         CLIENT *target, *prefix;
1103
1104         assert( Client != NULL );
1105         assert( Req != NULL );
1106
1107         IRC_SetPenalty(Client, 1);
1108
1109         _IRC_GET_SENDER_OR_RETURN_(prefix, Req, Client)
1110         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, prefix)
1111
1112         /* Forward? */
1113         if (target != Client_ThisServer()) {
1114                 IRC_WriteStrClientPrefix(target, prefix, "VERSION %s",
1115                                          Client_ID(target));
1116                 return CONNECTED;
1117         }
1118
1119         /* send version information */
1120         return IRC_WriteStrClient(Client, RPL_VERSION_MSG, Client_ID(prefix),
1121                                   PACKAGE_NAME, PACKAGE_VERSION,
1122                                   NGIRCd_DebugLevel, Conf_ServerName,
1123                                   NGIRCd_VersionAddition);
1124 } /* IRC_VERSION */
1125
1126 /**
1127  * Handler for the IRC "WHO" command.
1128  *
1129  * @param Client The client from which this command has been received.
1130  * @param Req Request structure with prefix and all parameters.
1131  * @return CONNECTED or DISCONNECTED.
1132  */
1133 GLOBAL bool
1134 IRC_WHO(CLIENT *Client, REQUEST *Req)
1135 {
1136         bool only_ops;
1137         CHANNEL *chan;
1138
1139         assert (Client != NULL);
1140         assert (Req != NULL);
1141
1142         IRC_SetPenalty(Client, 1);
1143
1144         only_ops = false;
1145         if (Req->argc == 2) {
1146                 if (strcmp(Req->argv[1], "o") == 0)
1147                         only_ops = true;
1148 #ifdef STRICT_RFC
1149                 else {
1150                         IRC_SetPenalty(Client, 2);
1151                         return IRC_WriteErrClient(Client,
1152                                                   ERR_NEEDMOREPARAMS_MSG,
1153                                                   Client_ID(Client),
1154                                                   Req->command);
1155                 }
1156 #endif
1157         }
1158
1159         if (Req->argc >= 1) {
1160                 /* Channel or mask given */
1161                 chan = Channel_Search(Req->argv[0]);
1162                 if (chan) {
1163                         /* Members of a channel have been requested */
1164                         return IRC_WHO_Channel(Client, chan, only_ops);
1165                 }
1166                 if (strcmp(Req->argv[0], "0") != 0) {
1167                         /* A mask has been given. But please note this RFC
1168                          * stupidity: "0" is same as no arguments ... */
1169                         return IRC_WHO_Mask(Client, Req->argv[0], only_ops);
1170                 }
1171         }
1172
1173         /* No channel or (valid) mask given */
1174         IRC_SetPenalty(Client, 2);
1175         return IRC_WHO_Mask(Client, NULL, only_ops);
1176 } /* IRC_WHO */
1177
1178 /**
1179  * Handler for the IRC "WHOIS" command.
1180  *
1181  * @param Client The client from which this command has been received.
1182  * @param Req Request structure with prefix and all parameters.
1183  * @return CONNECTED or DISCONNECTED.
1184  */
1185 GLOBAL bool
1186 IRC_WHOIS( CLIENT *Client, REQUEST *Req )
1187 {
1188         CLIENT *from, *target, *c;
1189         unsigned int match_count = 0, found = 0;
1190         bool has_wildcards, is_remote;
1191         bool got_wildcard = false;
1192         char mask[COMMAND_LEN], *query;
1193
1194         assert( Client != NULL );
1195         assert( Req != NULL );
1196
1197         IRC_SetPenalty(Client, 1);
1198
1199         /* Wrong number of parameters? */
1200         if (Req->argc < 1)
1201                 return IRC_WriteErrClient(Client, ERR_NONICKNAMEGIVEN_MSG,
1202                                           Client_ID(Client));
1203
1204         _IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
1205         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
1206
1207         /* Get target server for this command */
1208         if (Req->argc > 1) {
1209                 _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, Client)
1210         } else
1211                 target = Client_ThisServer();
1212
1213         assert(target != NULL);
1214
1215         /* Forward? */
1216         if (target != Client_ThisServer()) {
1217                 IRC_WriteStrClientPrefix(target, from, "WHOIS %s :%s",
1218                                          Req->argv[0], Req->argv[1]);
1219                 return CONNECTED;
1220         }
1221
1222         is_remote = Client_Conn(from) < 0;
1223         strlcpy(mask, Req->argv[Req->argc - 1], sizeof(mask));
1224         for (query = strtok(ngt_LowerStr(mask), ",");
1225                         query && found < 3;
1226                         query = strtok(NULL, ","), found++)
1227         {
1228                 has_wildcards = query[strcspn(query, "*?")] != 0;
1229                 /*
1230                  * follows ircd 2.10 implementation:
1231                  *  - handle up to 3 targets
1232                  *  - no wildcards for remote clients
1233                  *  - only one wildcard target per local client
1234                  *
1235                  *  Also, at most MAX_RPL_WHOIS matches are returned.
1236                  */
1237                 if (!has_wildcards || is_remote) {
1238                         c = Client_Search(query);
1239                         if (c && (Client_Type(c) == CLIENT_USER
1240                                   || Client_Type(c) == CLIENT_SERVICE)) {
1241                                 if (!IRC_WHOIS_SendReply(Client, from, c))
1242                                         return DISCONNECTED;
1243                         } else {
1244                                 if (!IRC_WriteErrClient(Client,
1245                                                         ERR_NOSUCHNICK_MSG,
1246                                                         Client_ID(Client),
1247                                                         query))
1248                                         return DISCONNECTED;
1249                         }
1250                         continue;
1251                 }
1252                 if (got_wildcard) {
1253                         /* we already handled one wildcard query */
1254                         if (!IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
1255                              Client_ID(Client), query))
1256                                 return DISCONNECTED;
1257                         continue;
1258                 }
1259                 got_wildcard = true;
1260                 IRC_SetPenalty(Client, 3);
1261
1262                 for (c = Client_First(); c; c = Client_Next(c)) {
1263                         if (IRC_CheckListTooBig(Client, match_count,
1264                                             MAX_RPL_WHOIS, "WHOIS"))
1265                                 break;
1266
1267                         if (Client_Type(c) != CLIENT_USER)
1268                                 continue;
1269                         if (!MatchCaseInsensitive(query, Client_ID(c)))
1270                                 continue;
1271                         if (!IRC_WHOIS_SendReply(Client, from, c))
1272                                 return DISCONNECTED;
1273
1274                         match_count++;
1275                 }
1276
1277                 if (match_count == 0)
1278                         IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
1279                                            Client_ID(Client),
1280                                            Req->argv[Req->argc - 1]);
1281         }
1282         return IRC_WriteStrClient(from, RPL_ENDOFWHOIS_MSG,
1283                                   Client_ID(from), Req->argv[Req->argc - 1]);
1284 } /* IRC_WHOIS */
1285
1286 /**
1287  * Handler for the IRC "WHOWAS" command.
1288  *
1289  * @param Client The client from which this command has been received.
1290  * @param Req Request structure with prefix and all parameters.
1291  * @return CONNECTED or DISCONNECTED.
1292  */
1293 GLOBAL bool
1294 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
1295 {
1296         CLIENT *target, *prefix;
1297         WHOWAS *whowas;
1298         char tok_buf[COMMAND_LEN];
1299         int max, last, count, i, nc;
1300         const char *nick;
1301
1302         assert( Client != NULL );
1303         assert( Req != NULL );
1304
1305         /* Wrong number of parameters? */
1306         if (Req->argc < 1)
1307                 return IRC_WriteErrClient(Client, ERR_NONICKNAMEGIVEN_MSG,
1308                                           Client_ID(Client));
1309
1310         _IRC_ARGC_LE_OR_RETURN_(Client, Req, 3)
1311         _IRC_GET_SENDER_OR_RETURN_(prefix, Req, Client)
1312         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 2, prefix)
1313
1314         /* Do not reveal any info on disconnected users? */
1315         if (Conf_MorePrivacy)
1316                 return CONNECTED;
1317
1318         /* Forward? */
1319         if (target != Client_ThisServer()) {
1320                 IRC_WriteStrClientPrefix(target, prefix, "WHOWAS %s %s %s",
1321                                          Req->argv[0], Req->argv[1],
1322                                          Client_ID(target));
1323                 return CONNECTED;
1324         }
1325
1326         whowas = Client_GetWhowas( );
1327         last = Client_GetLastWhowasIndex( );
1328         if (last < 0)
1329                 last = 0;
1330
1331         max = DEF_RPL_WHOWAS;
1332         if (Req->argc > 1) {
1333                 max = atoi(Req->argv[1]);
1334                 if (max < 1)
1335                         max = MAX_RPL_WHOWAS;
1336         }
1337
1338         /*
1339          * Break up the nick argument into a list of nicks, if applicable
1340          * Can't modify Req->argv[0] because we need it for RPL_ENDOFWHOWAS_MSG.
1341          */
1342         strlcpy(tok_buf, Req->argv[0], sizeof(tok_buf));
1343         nick = strtok(tok_buf, ",");
1344
1345         for (i=last, count=0; nick != NULL ; nick = strtok(NULL, ",")) {
1346                 nc = 0;
1347                 do {
1348                         /* Used entry? */
1349                         if (whowas[i].time > 0 && strcasecmp(nick, whowas[i].id) == 0) {
1350                                 if (!WHOWAS_EntryWrite(prefix, &whowas[i]))
1351                                         return DISCONNECTED;
1352                                 nc++;
1353                                 count++;
1354                         }
1355                         /* previous entry */
1356                         i--;
1357
1358                         /* "underflow", wrap around */
1359                         if (i < 0)
1360                                 i = MAX_WHOWAS - 1;
1361
1362                         if (nc && count >= max)
1363                                 break;
1364                 } while (i != last);
1365
1366                 if (nc == 0 && !IRC_WriteErrClient(prefix, ERR_WASNOSUCHNICK_MSG,
1367                                                 Client_ID(prefix), nick))
1368                         return DISCONNECTED;
1369         }
1370         return IRC_WriteStrClient(prefix, RPL_ENDOFWHOWAS_MSG,
1371                                   Client_ID(prefix), Req->argv[0]);
1372 } /* IRC_WHOWAS */
1373
1374 /**
1375  * Send LUSERS reply to a client.
1376  *
1377  * @param Client The receipient of the information.
1378  * @return CONNECTED or DISCONNECTED.
1379  */
1380 GLOBAL bool
1381 IRC_Send_LUSERS(CLIENT *Client)
1382 {
1383         unsigned long cnt;
1384 #ifndef STRICT_RFC
1385         unsigned long max;
1386 #endif
1387
1388         assert(Client != NULL);
1389
1390         /* Users, services and servers in the network */
1391         if (!IRC_WriteStrClient(Client, RPL_LUSERCLIENT_MSG, Client_ID(Client),
1392                                 Client_UserCount(), Client_ServiceCount(),
1393                                 Client_ServerCount()))
1394                 return DISCONNECTED;
1395
1396         /* Number of IRC operators */
1397         cnt = Client_OperCount( );
1398         if (cnt > 0) {
1399                 if (!IRC_WriteStrClient(Client, RPL_LUSEROP_MSG,
1400                                         Client_ID(Client), cnt))
1401                         return DISCONNECTED;
1402         }
1403
1404         /* Unknown connections */
1405         cnt = Client_UnknownCount( );
1406         if (cnt > 0) {
1407                 if (!IRC_WriteStrClient(Client, RPL_LUSERUNKNOWN_MSG,
1408                                         Client_ID(Client), cnt))
1409                         return DISCONNECTED;
1410         }
1411
1412         /* Number of created channels */
1413         if (!IRC_WriteStrClient(Client, RPL_LUSERCHANNELS_MSG,
1414                                 Client_ID(Client),
1415                                 Channel_CountVisible(Client)))
1416                 return DISCONNECTED;
1417
1418         /* Number of local users, services and servers */
1419         if (!IRC_WriteStrClient(Client, RPL_LUSERME_MSG, Client_ID(Client),
1420                                 Client_MyUserCount(), Client_MyServiceCount(),
1421                                 Client_MyServerCount()))
1422                 return DISCONNECTED;
1423
1424 #ifndef STRICT_RFC
1425         /* Maximum number of local users */
1426         cnt = Client_MyUserCount();
1427         max = Client_MyMaxUserCount();
1428         if (! IRC_WriteStrClient(Client, RPL_LOCALUSERS_MSG, Client_ID(Client),
1429                         cnt, max, cnt, max))
1430                 return DISCONNECTED;
1431         /* Maximum number of users in the network */
1432         cnt = Client_UserCount();
1433         max = Client_MaxUserCount();
1434         if(! IRC_WriteStrClient(Client, RPL_NETUSERS_MSG, Client_ID(Client),
1435                         cnt, max, cnt, max))
1436                 return DISCONNECTED;
1437         /* Connection counters */
1438         if (! IRC_WriteStrClient(Client, RPL_STATSCONN_MSG, Client_ID(Client),
1439                         Conn_CountMax(), Conn_CountAccepted()))
1440                 return DISCONNECTED;
1441 #endif
1442
1443         return CONNECTED;
1444 } /* IRC_Send_LUSERS */
1445
1446 GLOBAL bool
1447 IRC_Show_MOTD( CLIENT *Client )
1448 {
1449         const char *line;
1450         size_t len_tot, len_str;
1451
1452         assert( Client != NULL );
1453
1454         len_tot = array_bytes(&Conf_Motd);
1455         if (len_tot == 0 && !Conn_UsesSSL(Client_Conn(Client)))
1456                 return IRC_WriteErrClient(Client, ERR_NOMOTD_MSG, Client_ID(Client));
1457
1458         if (!IRC_WriteStrClient(Client, RPL_MOTDSTART_MSG, Client_ID(Client),
1459                                 Client_ID(Client_ThisServer())))
1460                 return DISCONNECTED;
1461
1462         line = array_start(&Conf_Motd);
1463         while (len_tot > 0) {
1464                 len_str = strlen(line) + 1;
1465
1466                 assert(len_tot >= len_str);
1467                 len_tot -= len_str;
1468
1469                 if (!IRC_WriteStrClient(Client, RPL_MOTD_MSG, Client_ID(Client), line))
1470                         return DISCONNECTED;
1471                 line += len_str;
1472         }
1473
1474         if (!Show_MOTD_SSLInfo(Client))
1475                 return DISCONNECTED;
1476
1477         if (!IRC_WriteStrClient(Client, RPL_ENDOFMOTD_MSG, Client_ID(Client)))
1478                 return DISCONNECTED;
1479
1480         if (*Conf_CloakHost)
1481                 return IRC_WriteStrClient(Client, RPL_HOSTHIDDEN_MSG,
1482                                           Client_ID(Client),
1483                                           Client_Hostname(Client));
1484
1485         return CONNECTED;
1486 } /* IRC_Show_MOTD */
1487
1488 /**
1489  * Send NAMES reply for a specific client and channel.
1490  *
1491  * @param Client The client requesting the NAMES information.
1492  * @param Chan The channel
1493  * @return CONNECTED or DISCONNECTED.
1494  */
1495 GLOBAL bool
1496 IRC_Send_NAMES(CLIENT * Client, CHANNEL * Chan)
1497 {
1498         bool is_visible, is_member;
1499         char str[COMMAND_LEN];
1500         CL2CHAN *cl2chan;
1501         CLIENT *cl;
1502
1503         assert(Client != NULL);
1504         assert(Chan != NULL);
1505
1506         if (Channel_IsMemberOf(Chan, Client))
1507                 is_member = true;
1508         else
1509                 is_member = false;
1510
1511         /* Do not print info on channel memberships to anyone that is not member? */
1512         if (Conf_MorePrivacy && !is_member)
1513                 return CONNECTED;
1514
1515         /* Secret channel? */
1516         if (!is_member && Channel_HasMode(Chan, 's'))
1517                 return CONNECTED;
1518
1519         snprintf(str, sizeof(str), RPL_NAMREPLY_MSG, Client_ID(Client), "=",
1520                  Channel_Name(Chan));
1521         cl2chan = Channel_FirstMember(Chan);
1522         while (cl2chan) {
1523                 cl = Channel_GetClient(cl2chan);
1524
1525                 if (Client_HasMode(cl, 'i'))
1526                         is_visible = false;
1527                 else
1528                         is_visible = true;
1529
1530                 if (is_member || is_visible) {
1531                         if (str[strlen(str) - 1] != ':')
1532                                 strlcat(str, " ", sizeof(str));
1533
1534                         who_flags_qualifier(Client, Channel_UserModes(Chan, cl),
1535                                             str, sizeof(str));
1536                         strlcat(str, Client_ID(cl), sizeof(str));
1537
1538                         if (strlen(str) > (COMMAND_LEN - CLIENT_NICK_LEN - 4)) {
1539                                 if (!IRC_WriteStrClient(Client, "%s", str))
1540                                         return DISCONNECTED;
1541                                 snprintf(str, sizeof(str), RPL_NAMREPLY_MSG,
1542                                          Client_ID(Client), "=",
1543                                          Channel_Name(Chan));
1544                         }
1545                 }
1546
1547                 cl2chan = Channel_NextMember(Chan, cl2chan);
1548         }
1549         if (str[strlen(str) - 1] != ':') {
1550                 if (!IRC_WriteStrClient(Client, "%s", str))
1551                         return DISCONNECTED;
1552         }
1553
1554         return CONNECTED;
1555 } /* IRC_Send_NAMES */
1556
1557 /**
1558  * Send the ISUPPORT numeric (005).
1559  * This numeric indicates the features that are supported by this server.
1560  * See <http://www.irc.org/tech_docs/005.html> for details.
1561  */
1562 GLOBAL bool
1563 IRC_Send_ISUPPORT(CLIENT * Client)
1564 {
1565         if (!IRC_WriteStrClient(Client, RPL_ISUPPORT1_MSG, Client_ID(Client),
1566                                 CHANTYPES, CHANTYPES, Conf_MaxJoins))
1567                 return DISCONNECTED;
1568         return IRC_WriteStrClient(Client, RPL_ISUPPORT2_MSG, Client_ID(Client),
1569                                   CHANNEL_NAME_LEN - 1, Conf_MaxNickLength - 1,
1570                                   COMMAND_LEN - 23, CLIENT_AWAY_LEN - 1,
1571                                   COMMAND_LEN - 113, MAX_HNDL_MODES_ARG,
1572                                   MAX_HNDL_CHANNEL_LISTS);
1573 } /* IRC_Send_ISUPPORT */
1574
1575 /* -eof- */