src/ngircd/irc-info.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2014 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 <assert.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <strings.h>
  24 #include <time.h>
  25
  26 #include "ngircd.h"
  27 #include "conn-func.h"
  28 #include "conn-zip.h"
  29 #include "channel.h"
  30 #include "class.h"
  31 #include "conf.h"
  32 #include "lists.h"
  33 #include "messages.h"
  34 #include "match.h"
  35 #include "parse.h"
  36 #include "irc.h"
  37 #include "irc-macros.h"
  38 #include "irc-write.h"
  39 #include "client-cap.h"
  40 #include "op.h"
  41
  42 #include "irc-info.h"
  43
  44 /* Local functions */
  45
  46 static unsigned int
  47 t_diff(time_t *t, const time_t d)
  48 {
  49         time_t diff, remain;
  50
  51         diff = *t / d;
  52         remain = diff * d;
  53         *t -= remain;
  54
  55         return (unsigned int)diff;
  56 }
  57
  58 static unsigned int
  59 uptime_days(time_t *now)
  60 {
  61         return t_diff(now, 60 * 60 * 24);
  62 }
  63
  64 static unsigned int
  65 uptime_hrs(time_t *now)
  66 {
  67         return t_diff(now, 60 * 60);
  68 }
  69
  70 static unsigned int
  71 uptime_mins(time_t *now)
  72 {
  73         return t_diff(now, 60);
  74 }
  75
  76 static bool
  77 write_whoreply(CLIENT *Client, CLIENT *c, const char *channelname, const char *flags)
  78 {
  79         return IRC_WriteStrClient(Client, RPL_WHOREPLY_MSG, Client_ID(Client),
  80                                   channelname, Client_User(c),
  81                                   Client_HostnameDisplayed(c),
  82                                   Client_ID(Client_Introducer(c)), Client_ID(c),
  83                                   flags, Client_Hops(c), Client_Info(c));
  84 }
  85
  86 /**
  87  * Return channel user mode prefix(es).
  88  *
  89  * @param Client The client requesting the mode prefixes.
  90  * @param chan_user_modes String with channel user modes.
  91  * @param str String buffer to which the prefix(es) will be appended.
  92  * @param len Size of "str" buffer.
  93  * @return Pointer to "str".
  94  */
  95 static char *
  96 who_flags_qualifier(CLIENT *Client, const char *chan_user_modes,
  97                     char *str, size_t len)
  98 {
  99         assert(Client != NULL);
 100
 101         if (Client_Cap(Client) & CLIENT_CAP_MULTI_PREFIX) {
 102                 if (strchr(chan_user_modes, 'q'))
 103                         strlcat(str, "~", len);
 104                 if (strchr(chan_user_modes, 'a'))
 105                         strlcat(str, "&", len);
 106                 if (strchr(chan_user_modes, 'o'))
 107                         strlcat(str, "@", len);
 108                 if (strchr(chan_user_modes, 'h'))
 109                         strlcat(str, "%", len);
 110                 if (strchr(chan_user_modes, 'v'))
 111                         strlcat(str, "+", len);
 112
 113                 return str;
 114         }
 115
 116         if (strchr(chan_user_modes, 'q'))
 117                 strlcat(str, "~", len);
 118         else if (strchr(chan_user_modes, 'a'))
 119                 strlcat(str, "&", len);
 120         else if (strchr(chan_user_modes, 'o'))
 121                 strlcat(str, "@", len);
 122         else if (strchr(chan_user_modes, 'h'))
 123                 strlcat(str, "%", len);
 124         else if (strchr(chan_user_modes, 'v'))
 125                 strlcat(str, "+", len);
 126
 127         return str;
 128 }
 129
 130 /**
 131  * Send WHO reply for a "channel target" ("WHO #channel").
 132  *
 133  * @param Client Client requesting the information.
 134  * @param Chan Channel being requested.
 135  * @param OnlyOps Only display IRC operators.
 136  * @return CONNECTED or DISCONNECTED.
 137  */
 138 static bool
 139 IRC_WHO_Channel(CLIENT *Client, CHANNEL *Chan, bool OnlyOps)
 140 {
 141         bool is_visible, is_member, is_ircop;
 142         CL2CHAN *cl2chan;
 143         char flags[10];
 144         CLIENT *c;
 145         int count = 0;
 146
 147         assert( Client != NULL );
 148         assert( Chan != NULL );
 149
 150         is_member = Channel_IsMemberOf(Chan, Client);
 151
 152         /* Secret channel? */
 153         if (!is_member && Channel_HasMode(Chan, 's'))
 154                 return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG,
 155                                           Client_ID(Client), Channel_Name(Chan));
 156
 157         cl2chan = Channel_FirstMember(Chan);
 158         for (; cl2chan ; cl2chan = Channel_NextMember(Chan, cl2chan)) {
 159                 c = Channel_GetClient(cl2chan);
 160
 161                 is_ircop = Client_HasMode(c, 'o');
 162                 if (OnlyOps && !is_ircop)
 163                         continue;
 164
 165                 is_visible = !Client_HasMode(c, 'i');
 166                 if (is_member || is_visible) {
 167                         memset(flags, 0, sizeof(flags));
 168
 169                         if (Client_HasMode(c, 'a'))
 170                                 flags[0] = 'G'; /* away */
 171                         else
 172                                 flags[0] = 'H';
 173
 174                         if (is_ircop)
 175                                 flags[1] = '*';
 176
 177                         who_flags_qualifier(Client, Channel_UserModes(Chan, c),
 178                                             flags, sizeof(flags));
 179
 180                         if (!write_whoreply(Client, c, Channel_Name(Chan),
 181                                             flags))
 182                                 return DISCONNECTED;
 183                         count++;
 184                 }
 185         }
 186
 187         /* If there are a lot of clients, increase the penalty a bit */
 188         if (count > MAX_RPL_WHO)
 189                 IRC_SetPenalty(Client, 1);
 190
 191         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 192                                   Channel_Name(Chan));
 193 }
 194
 195 /**
 196  * Send WHO reply for a "mask target" ("WHO m*sk").
 197  *
 198  * @param Client Client requesting the information.
 199  * @param Mask Mask being requested or NULL for "all" clients.
 200  * @param OnlyOps Only display IRC operators.
 201  * @return CONNECTED or DISCONNECTED.
 202  */
 203 static bool
 204 IRC_WHO_Mask(CLIENT *Client, char *Mask, bool OnlyOps)
 205 {
 206         CLIENT *c;
 207         CL2CHAN *cl2chan;
 208         CHANNEL *chan;
 209         bool client_match, is_visible;
 210         char flags[3];
 211         int count = 0;
 212
 213         assert (Client != NULL);
 214
 215         if (Mask)
 216                 ngt_LowerStr(Mask);
 217
 218         IRC_SetPenalty(Client, 3);
 219         for (c = Client_First(); c != NULL; c = Client_Next(c)) {
 220                 if (Client_Type(c) != CLIENT_USER)
 221                         continue;
 222
 223                 if (OnlyOps && !Client_HasMode(c, 'o'))
 224                         continue;
 225
 226                 if (Mask) {
 227                         /* Match pattern against user host/server/name/nick */
 228                         client_match = MatchCaseInsensitive(Mask,
 229                                                             Client_Hostname(c));
 230                         if (!client_match)
 231                                 client_match = MatchCaseInsensitive(Mask,
 232                                                                     Client_ID(Client_Introducer(c)));
 233                         if (!client_match)
 234                                 client_match = MatchCaseInsensitive(Mask,
 235                                                                     Client_Info(c));
 236                         if (!client_match)
 237                                 client_match = MatchCaseInsensitive(Mask,
 238                                                                     Client_ID(c));
 239                         if (!client_match)
 240                                 continue;       /* no match: skip this client */
 241                 }
 242
 243                 is_visible = !Client_HasMode(c, 'i');
 244
 245                 /* Target client is invisible, but mask matches exactly? */
 246                 if (!is_visible && Mask && strcasecmp(Client_ID(c), Mask) == 0)
 247                         is_visible = true;
 248
 249                 /* Target still invisible, but are both on the same channel? */
 250                 if (!is_visible) {
 251                         cl2chan = Channel_FirstChannelOf(Client);
 252                         while (cl2chan && !is_visible) {
 253                                 chan = Channel_GetChannel(cl2chan);
 254                                 if (Channel_IsMemberOf(chan, c))
 255                                         is_visible = true;
 256                                 cl2chan = Channel_NextChannelOf(Client, cl2chan);
 257                         }
 258                 }
 259
 260                 if (!is_visible)        /* target user is not visible */
 261                         continue;
 262
 263                 if (IRC_CheckListTooBig(Client, count, MAX_RPL_WHO, "WHO"))
 264                         break;
 265
 266                 memset(flags, 0, sizeof(flags));
 267
 268                 if (Client_HasMode(c, 'a'))
 269                         flags[0] = 'G'; /* away */
 270                 else
 271                         flags[0] = 'H';
 272
 273                 if (Client_HasMode(c, 'o'))
 274                         flags[1] = '*';
 275
 276                 if (!write_whoreply(Client, c, "*", flags))
 277                         return DISCONNECTED;
 278                 count++;
 279         }
 280
 281         return IRC_WriteStrClient(Client, RPL_ENDOFWHO_MSG, Client_ID(Client),
 282                                   Mask ? Mask : "*");
 283 }
 284
 285 /**
 286  * Generate WHOIS reply of one actual client.
 287  *
 288  * @param Client The client from which this command has been received.
 289  * @param from The client requesting the information ("originator").
 290  * @param c The client of which information should be returned.
 291  * @return CONNECTED or DISCONNECTED.
 292  */
 293 static bool
 294 IRC_WHOIS_SendReply(CLIENT *Client, CLIENT *from, CLIENT *c)
 295 {
 296         char str[COMMAND_LEN];
 297         CL2CHAN *cl2chan;
 298         CHANNEL *chan;
 299
 300         assert(Client != NULL);
 301         assert(from != NULL);
 302         assert(c != NULL);
 303
 304         /* Nick, user, hostname and client info */
 305         if (!IRC_WriteStrClient(from, RPL_WHOISUSER_MSG, Client_ID(from),
 306                                 Client_ID(c), Client_User(c),
 307                                 Client_HostnameDisplayed(c), Client_Info(c)))
 308                 return DISCONNECTED;
 309
 310         /* Server */
 311         if (!IRC_WriteStrClient(from, RPL_WHOISSERVER_MSG, Client_ID(from),
 312                                 Client_ID(c), Client_ID(Client_Introducer(c)),
 313                                 Client_Info(Client_Introducer(c))))
 314                 return DISCONNECTED;
 315
 316         /* Channels */
 317         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
 318                  Client_ID(from), Client_ID(c));
 319         cl2chan = Channel_FirstChannelOf(c);
 320         while (cl2chan) {
 321                 chan = Channel_GetChannel(cl2chan);
 322                 assert(chan != NULL);
 323
 324                 /* next */
 325                 cl2chan = Channel_NextChannelOf(c, cl2chan);
 326
 327                 /* Secret channel? */
 328                 if (Channel_HasMode(chan, 's')
 329                     && !Channel_IsMemberOf(chan, Client))
 330                         continue;
 331
 332                 /* Local channel and request is not from a user? */
 333                 if (Client_Type(Client) == CLIENT_SERVER
 334                     && Channel_IsLocal(chan))
 335                         continue;
 336
 337                 /* Concatenate channel names */
 338                 if (str[strlen(str) - 1] != ':')
 339                         strlcat(str, " ", sizeof(str));
 340
 341                 who_flags_qualifier(Client, Channel_UserModes(chan, c),
 342                                     str, sizeof(str));
 343                 strlcat(str, Channel_Name(chan), sizeof(str));
 344
 345                 if (strlen(str) > (COMMAND_LEN - CHANNEL_NAME_LEN - 4)) {
 346                         /* Line becomes too long: send it! */
 347                         if (!IRC_WriteStrClient(Client, "%s", str))
 348                                 return DISCONNECTED;
 349                         snprintf(str, sizeof(str), RPL_WHOISCHANNELS_MSG,
 350                                  Client_ID(from), Client_ID(c));
 351                 }
 352         }
 353         if(str[strlen(str) - 1] != ':') {
 354                 /* There is data left to send: */
 355                 if (!IRC_WriteStrClient(Client, "%s", str))
 356                         return DISCONNECTED;
 357         }
 358
 359         /* IRC-Services? */
 360         if (Client_Type(c) == CLIENT_SERVICE &&
 361             !IRC_WriteStrClient(from, RPL_WHOISSERVICE_MSG,
 362                                 Client_ID(from), Client_ID(c)))
 363                 return DISCONNECTED;
 364
 365         /* IRC-Operator? */
 366         if (Client_Type(c) != CLIENT_SERVICE &&
 367             Client_HasMode(c, 'o') &&
 368             !IRC_WriteStrClient(from, RPL_WHOISOPERATOR_MSG,
 369                                 Client_ID(from), Client_ID(c)))
 370                 return DISCONNECTED;
 371
 372         /* IRC-Bot? */
 373         if (Client_HasMode(c, 'B') &&
 374             !IRC_WriteStrClient(from, RPL_WHOISBOT_MSG,
 375                                 Client_ID(from), Client_ID(c)))
 376                 return DISCONNECTED;
 377
 378         /* Connected using SSL? */
 379         if (Conn_UsesSSL(Client_Conn(c))) {
 380                 if (!IRC_WriteStrClient(from, RPL_WHOISSSL_MSG, Client_ID(from),
 381                                         Client_ID(c)))
 382                         return DISCONNECTED;
 383
 384                 /* Certificate fingerprint? */
 385                 if (Conn_GetCertFp(Client_Conn(c)) &&
 386                     from == c &&
 387                     !IRC_WriteStrClient(from, RPL_WHOISCERTFP_MSG,
 388                                         Client_ID(from), Client_ID(c),
 389                                         Conn_GetCertFp(Client_Conn(c))))
 390                         return DISCONNECTED;
 391         }
 392
 393         /* Registered nickname? */
 394         if (Client_HasMode(c, 'R') &&
 395             !IRC_WriteStrClient(from, RPL_WHOISREGNICK_MSG,
 396                                 Client_ID(from), Client_ID(c)))
 397                 return DISCONNECTED;
 398
 399         /* Account name metadata? */
 400         if (Client_AccountName(c) &&
 401             !IRC_WriteStrClient(from, RPL_WHOISLOGGEDIN_MSG,
 402                                 Client_ID(from), Client_ID(c),
 403                                 Client_AccountName(c)))
 404                 return DISCONNECTED;
 405
 406         /* Local client and requester is the user itself or an IRC Op? */
 407         if (Client_Conn(c) > NONE &&
 408             (from == c || (!Conf_MorePrivacy && Client_HasMode(from, 'o')))) {
 409                 /* Client hostname */
 410                 if (!IRC_WriteStrClient(from, RPL_WHOISHOST_MSG,
 411                                         Client_ID(from), Client_ID(c),
 412                                         Client_Hostname(c), Client_IPAText(c)))
 413                         return DISCONNECTED;
 414                 /* Client modes */
 415                 if (!IRC_WriteStrClient(from, RPL_WHOISMODES_MSG,
 416                                         Client_ID(from), Client_ID(c), Client_Modes(c)))
 417                         return DISCONNECTED;
 418         }
 419
 420         /* Idle and signon time (local clients only!) */
 421         if (!Conf_MorePrivacy && Client_Conn(c) > NONE &&
 422             !IRC_WriteStrClient(from, RPL_WHOISIDLE_MSG,
 423                                 Client_ID(from), Client_ID(c),
 424                                 (unsigned long)Conn_GetIdle(Client_Conn(c)),
 425                                 (unsigned long)Conn_GetSignon(Client_Conn(c))))
 426                 return DISCONNECTED;
 427
 428         /* Away? */
 429         if (Client_HasMode(c, 'a') &&
 430             !IRC_WriteStrClient(from, RPL_AWAY_MSG,
 431                                 Client_ID(from), Client_ID(c), Client_Away(c)))
 432                 return DISCONNECTED;
 433
 434         return CONNECTED;
 435 }
 436
 437 static bool
 438 WHOWAS_EntryWrite(CLIENT *prefix, WHOWAS *entry)
 439 {
 440         char t_str[60];
 441
 442         (void)strftime(t_str, sizeof(t_str), "%a %b %d %H:%M:%S %Y",
 443                        localtime(&entry->time));
 444
 445         if (!IRC_WriteStrClient(prefix, RPL_WHOWASUSER_MSG, Client_ID(prefix),
 446                                 entry->id, entry->user, entry->host, entry->info))
 447                 return DISCONNECTED;
 448
 449         return IRC_WriteStrClient(prefix, RPL_WHOISSERVER_MSG, Client_ID(prefix),
 450                                   entry->id, entry->server, t_str);
 451 }
 452
 453 #ifdef SSL_SUPPORT
 454 static bool
 455 Show_MOTD_SSLInfo(CLIENT *Client)
 456 {
 457         char buf[COMMAND_LEN];
 458         char c_str[128];
 459
 460         if (Conn_GetCipherInfo(Client_Conn(Client), c_str, sizeof(c_str))) {
 461                 snprintf(buf, sizeof(buf), "Connected using Cipher %s", c_str);
 462                 if (!IRC_WriteStrClient(Client, RPL_MOTD_MSG,
 463                                         Client_ID(Client), buf))
 464                         return false;
 465         }
 466
 467         if (Conn_GetCertFp(Client_Conn(Client))) {
 468                 snprintf(buf, sizeof(buf),
 469                          "Your client certificate fingerprint is: %s",
 470                          Conn_GetCertFp(Client_Conn(Client)));
 471                 if (!IRC_WriteStrClient(Client, RPL_MOTD_MSG,
 472                                         Client_ID(Client), buf))
 473                         return false;
 474         }
 475
 476         return true;
 477 }
 478 #else
 479 static bool
 480 Show_MOTD_SSLInfo(UNUSED CLIENT *c)
 481 {
 482         return true;
 483 }
 484 #endif
 485
 486 /* Global functions */
 487
 488 /**
 489  * Handler for the IRC command "ADMIN".
 490  *
 491  * @param Client The client from which this command has been received.
 492  * @param Req Request structure with prefix and all parameters.
 493  * @return CONNECTED or DISCONNECTED.
 494  */
 495 GLOBAL bool
 496 IRC_ADMIN(CLIENT *Client, REQUEST *Req )
 497 {
 498         CLIENT *target, *prefix;
 499
 500         assert( Client != NULL );
 501         assert( Req != NULL );
 502
 503         _IRC_GET_SENDER_OR_RETURN_(prefix, Req, Client)
 504         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, prefix)
 505
 506         /* Forward? */
 507         if(target != Client_ThisServer()) {
 508                 IRC_WriteStrClientPrefix(target, prefix,
 509                                          "ADMIN %s", Client_ID(target));
 510                 return CONNECTED;
 511         }
 512
 513         if (!IRC_WriteStrClient(Client, RPL_ADMINME_MSG, Client_ID(prefix),
 514                                 Conf_ServerName))
 515                 return DISCONNECTED;
 516         if (!IRC_WriteStrClient(Client, RPL_ADMINLOC1_MSG, Client_ID(prefix),
 517                                 Conf_ServerAdmin1))
 518                 return DISCONNECTED;
 519         if (!IRC_WriteStrClient(Client, RPL_ADMINLOC2_MSG, Client_ID(prefix),
 520                                 Conf_ServerAdmin2))
 521                 return DISCONNECTED;
 522         if (!IRC_WriteStrClient(Client, RPL_ADMINEMAIL_MSG, Client_ID(prefix),
 523                                 Conf_ServerAdminMail))
 524                 return DISCONNECTED;
 525
 526         return CONNECTED;
 527 } /* IRC_ADMIN */
 528
 529 /**
 530  * Handler for the IRC command "INFO".
 531  *
 532  * @param Client The client from which this command has been received.
 533  * @param Req Request structure with prefix and all parameters.
 534  * @return CONNECTED or DISCONNECTED.
 535  */
 536 GLOBAL bool
 537 IRC_INFO(CLIENT * Client, REQUEST * Req)
 538 {
 539         CLIENT *target, *prefix;
 540         char msg[510];
 541
 542         assert(Client != NULL);
 543         assert(Req != NULL);
 544
 545         _IRC_GET_SENDER_OR_RETURN_(prefix, Req, Client)
 546         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, prefix)
 547
 548         /* Forward? */
 549         if (target != Client_ThisServer()) {
 550                 IRC_WriteStrClientPrefix(target, prefix, "INFO %s",
 551                                          Client_ID(target));
 552                 return CONNECTED;
 553         }
 554
 555         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix),
 556                                 NGIRCd_Version))
 557                 return DISCONNECTED;
 558
 559 #if defined(__DATE__) && defined(__TIME__)
 560         snprintf(msg, sizeof(msg), "Birth Date: %s at %s", __DATE__, __TIME__);
 561         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 562                 return DISCONNECTED;
 563 #endif
 564
 565         strlcpy(msg, "On-line since ", sizeof(msg));
 566         strlcat(msg, NGIRCd_StartStr, sizeof(msg));
 567         if (!IRC_WriteStrClient(Client, RPL_INFO_MSG, Client_ID(prefix), msg))
 568                 return DISCONNECTED;
 569
 570         if (!IRC_WriteStrClient(Client, RPL_ENDOFINFO_MSG, Client_ID(prefix)))
 571                 return DISCONNECTED;
 572
 573         return CONNECTED;
 574 } /* IRC_INFO */
 575
 576 /**
 577  * Handler for the IRC "ISON" command.
 578  *
 579  * @param Client The client from which this command has been received.
 580  * @param Req Request structure with prefix and all parameters.
 581  * @return CONNECTED or DISCONNECTED.
 582  */
 583 GLOBAL bool
 584 IRC_ISON( CLIENT *Client, REQUEST *Req )
 585 {
 586         char rpl[COMMAND_LEN];
 587         CLIENT *c;
 588         char *ptr;
 589         int i;
 590
 591         assert(Client != NULL);
 592         assert(Req != NULL);
 593
 594         strlcpy(rpl, RPL_ISON_MSG, sizeof rpl);
 595         for (i = 0; i < Req->argc; i++) {
 596                 /* "All" ircd even parse ":<x> <y> ..." arguments and split
 597                  * them up; so we do the same ... */
 598                 ptr = strtok(Req->argv[i], " ");
 599                 while (ptr) {
 600                         ngt_TrimStr(ptr);
 601                         c = Client_Search(ptr);
 602                         if (c && Client_Type(c) == CLIENT_USER) {
 603                                 strlcat(rpl, Client_ID(c), sizeof(rpl));
 604                                 strlcat(rpl, " ", sizeof(rpl));
 605                         }
 606                         ptr = strtok(NULL, " ");
 607                 }
 608         }
 609         ngt_TrimLastChr(rpl, ' ');
 610
 611         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
 612 } /* IRC_ISON */
 613
 614 /**
 615  * Handler for the IRC "LINKS" command.
 616  *
 617  * @param Client The client from which this command has been received.
 618  * @param Req Request structure with prefix and all parameters.
 619  * @return CONNECTED or DISCONNECTED.
 620  */
 621 GLOBAL bool
 622 IRC_LINKS(CLIENT *Client, REQUEST *Req)
 623 {
 624         CLIENT *target, *from, *c;
 625         char *mask;
 626
 627         assert(Client != NULL);
 628         assert(Req != NULL);
 629
 630         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 631
 632         /* Get pointer to server mask or "*", if none given */
 633         if (Req->argc > 0)
 634                 mask = Req->argv[Req->argc - 1];
 635         else
 636                 mask = "*";
 637
 638         /* Forward? */
 639         if (Req->argc == 2) {
 640                 _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from)
 641                 if (target != Client_ThisServer()) {
 642                         IRC_WriteStrClientPrefix(target, from,
 643                                         "LINKS %s %s", Client_ID(target),
 644                                         Req->argv[1]);
 645                         return CONNECTED;
 646                 }
 647         }
 648
 649         c = Client_First();
 650         while (c) {
 651                 if (Client_Type(c) == CLIENT_SERVER
 652                     && MatchCaseInsensitive(mask, Client_ID(c))) {
 653                         if (!IRC_WriteStrClient(from, RPL_LINKS_MSG,
 654                                         Client_ID(from), Client_ID(c),
 655                                         Client_ID(Client_TopServer(c)
 656                                                   ? Client_TopServer(c)
 657                                                   : Client_ThisServer()),
 658                                         Client_Hops(c), Client_Info(c)))
 659                                 return DISCONNECTED;
 660                 }
 661                 c = Client_Next(c);
 662         }
 663         return IRC_WriteStrClient(from, RPL_ENDOFLINKS_MSG,
 664                                   Client_ID(from), mask);
 665 } /* IRC_LINKS */
 666
 667 /**
 668  * Handler for the IRC "LUSERS" command.
 669  *
 670  * @param Client The client from which this command has been received.
 671  * @param Req Request structure with prefix and all parameters.
 672  * @return CONNECTED or DISCONNECTED.
 673  */
 674 GLOBAL bool
 675 IRC_LUSERS( CLIENT *Client, REQUEST *Req )
 676 {
 677         CLIENT *target, *from;
 678
 679         assert( Client != NULL );
 680         assert( Req != NULL );
 681
 682         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 683         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 1, from)
 684
 685         /* Forward? */
 686         if (target != Client_ThisServer()) {
 687                 IRC_WriteStrClientPrefix(target, from,
 688                                          "LUSERS %s %s", Req->argv[0],
 689                                          Client_ID(target));
 690                 return CONNECTED;
 691         }
 692
 693         return IRC_Send_LUSERS(from);
 694 } /* IRC_LUSERS */
 695
 696 /**
 697  * Handler for the IRC command "SERVLIST".
 698  *
 699  * @param Client The client from which this command has been received.
 700  * @param Req Request structure with prefix and all parameters.
 701  * @return CONNECTED or DISCONNECTED.
 702  */
 703 GLOBAL bool
 704 IRC_SERVLIST(CLIENT *Client, REQUEST *Req)
 705 {
 706         CLIENT *c;
 707
 708         assert(Client != NULL);
 709         assert(Req != NULL);
 710
 711         if (Req->argc < 2 || strcmp(Req->argv[1], "0") == 0) {
 712                 for (c = Client_First(); c!= NULL; c = Client_Next(c)) {
 713                         if (Client_Type(c) != CLIENT_SERVICE)
 714                                 continue;
 715                         if (Req->argc > 0 && !MatchCaseInsensitive(Req->argv[0],
 716                                                                   Client_ID(c)))
 717                                 continue;
 718                         if (!IRC_WriteStrClient(Client, RPL_SERVLIST_MSG,
 719                                         Client_ID(Client), Client_Mask(c),
 720                                         Client_Mask(Client_Introducer(c)), "*",
 721                                         0, Client_Hops(c), Client_Info(c)))
 722                                 return DISCONNECTED;
 723                 }
 724         }
 725
 726         return IRC_WriteStrClient(Client, RPL_SERVLISTEND_MSG, Client_ID(Client),
 727                                   Req->argc > 0 ? Req->argv[0] : "*",
 728                                   Req->argc > 1 ? Req->argv[1] : "0");
 729 } /* IRC_SERVLIST */
 730
 731 /**
 732  * Handler for the IRC command "MOTD".
 733  *
 734  * @param Client The client from which this command has been received.
 735  * @param Req Request structure with prefix and all parameters.
 736  * @return CONNECTED or DISCONNECTED.
 737  */
 738 GLOBAL bool
 739 IRC_MOTD( CLIENT *Client, REQUEST *Req )
 740 {
 741         CLIENT *from, *target;
 742
 743         assert( Client != NULL );
 744         assert( Req != NULL );
 745
 746         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 747         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from)
 748
 749         /* Forward? */
 750         if (target != Client_ThisServer()) {
 751                 IRC_WriteStrClientPrefix(target, from, "MOTD %s",
 752                                          Client_ID(target));
 753                 return CONNECTED;
 754         }
 755
 756         return IRC_Show_MOTD(from);
 757 } /* IRC_MOTD */
 758
 759 /**
 760  * Handler for the IRC command "NAMES".
 761  *
 762  * @param Client The client from which this command has been received.
 763  * @param Req Request structure with prefix and all parameters.
 764  * @return CONNECTED or DISCONNECTED.
 765  */
 766 GLOBAL bool
 767 IRC_NAMES( CLIENT *Client, REQUEST *Req )
 768 {
 769         char rpl[COMMAND_LEN], *ptr;
 770         CLIENT *target, *from, *c;
 771         CHANNEL *chan;
 772
 773         assert( Client != NULL );
 774         assert( Req != NULL );
 775
 776         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 777         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 1, from)
 778
 779         /* Forward? */
 780         if (target != Client_ThisServer()) {
 781                 IRC_WriteStrClientPrefix(target, from, "NAMES %s :%s",
 782                                          Req->argv[0], Client_ID(target));
 783                 return CONNECTED;
 784         }
 785
 786         if (Req->argc > 0) {
 787                 /* Return NAMES list for specific channels */
 788                 ptr = strtok(Req->argv[0], ",");
 789                 while(ptr) {
 790                         chan = Channel_Search(ptr);
 791                         if (chan && !IRC_Send_NAMES(from, chan))
 792                                 return DISCONNECTED;
 793                         if (!IRC_WriteStrClient(from, RPL_ENDOFNAMES_MSG,
 794                                                 Client_ID(from), ptr))
 795                                 return DISCONNECTED;
 796                         ptr = strtok( NULL, "," );
 797                 }
 798                 return CONNECTED;
 799         }
 800
 801         chan = Channel_First();
 802         while (chan) {
 803                 if (!IRC_Send_NAMES(from, chan))
 804                         return DISCONNECTED;
 805                 chan = Channel_Next(chan);
 806         }
 807
 808         /* Now print all clients which are not in any channel */
 809         c = Client_First();
 810         snprintf(rpl, sizeof(rpl), RPL_NAMREPLY_MSG, Client_ID(from), "*", "*");
 811         while (c) {
 812                 if (Client_Type(c) == CLIENT_USER
 813                     && Channel_FirstChannelOf(c) == NULL
 814                     && !Client_HasMode(c, 'i'))
 815                 {
 816                         /* its a user, concatenate ... */
 817                         if (rpl[strlen(rpl) - 1] != ':')
 818                                 strlcat(rpl, " ", sizeof(rpl));
 819                         strlcat(rpl, Client_ID(c), sizeof(rpl));
 820
 821                         if (strlen(rpl) > COMMAND_LEN - CLIENT_NICK_LEN - 4) {
 822                                 /* Line is gwoing too long, send now */
 823                                 if (!IRC_WriteStrClient(from, "%s", rpl))
 824                                         return DISCONNECTED;
 825                                 snprintf(rpl, sizeof(rpl), RPL_NAMREPLY_MSG,
 826                                          Client_ID(from), "*", "*");
 827                         }
 828                 }
 829                 c = Client_Next(c);
 830         }
 831         if (rpl[strlen(rpl) - 1] != ':' && !IRC_WriteStrClient(from, "%s", rpl))
 832                 return DISCONNECTED;
 833
 834         return IRC_WriteStrClient(from, RPL_ENDOFNAMES_MSG, Client_ID(from), "*");
 835 } /* IRC_NAMES */
 836
 837 /**
 838  * Handler for the IRC command "STATS".
 839  *
 840  * @param Client The client from which this command has been received.
 841  * @param Req Request structure with prefix and all parameters.
 842  * @return CONNECTED or DISCONNECTED.
 843  */
 844 GLOBAL bool
 845 IRC_STATS( CLIENT *Client, REQUEST *Req )
 846 {
 847         CLIENT *from, *target, *cl;
 848         CONN_ID con;
 849         char query;
 850         COMMAND *cmd;
 851         time_t time_now;
 852         unsigned int days, hrs, mins;
 853         struct list_head *list;
 854         struct list_elem *list_item;
 855         bool more_links = false;
 856
 857         assert(Client != NULL);
 858         assert(Req != NULL);
 859
 860         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 861         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 1, from)
 862
 863         /* Forward? */
 864         if (target != Client_ThisServer()) {
 865                 IRC_WriteStrClientPrefix(target, from, "STATS %s %s",
 866                                          Req->argv[0], Client_ID(target));
 867                 return CONNECTED;
 868         }
 869
 870         if (Req->argc > 0)
 871                 query = Req->argv[0][0] ? Req->argv[0][0] : '*';
 872         else
 873                 query = '*';
 874
 875         switch (query) {
 876         case 'g':       /* Network-wide bans ("G-Lines") */
 877         case 'G':
 878         case 'k':       /* Server-local bans ("K-Lines") */
 879         case 'K':
 880                 if (!Client_HasMode(from, 'o'))
 881                     return IRC_WriteErrClient(from, ERR_NOPRIVILEGES_MSG,
 882                                               Client_ID(from));
 883                 if (query == 'g' || query == 'G')
 884                         list = Class_GetList(CLASS_GLINE);
 885                 else
 886                         list = Class_GetList(CLASS_KLINE);
 887                         list_item = Lists_GetFirst(list);
 888                         while (list_item) {
 889                                 if (!IRC_WriteStrClient(from, RPL_STATSXLINE_MSG,
 890                                                 Client_ID(from), query,
 891                                                 Lists_GetMask(list_item),
 892                                                 Lists_GetValidity(list_item),
 893                                                 Lists_GetReason(list_item)))
 894                                         return DISCONNECTED;
 895                                 list_item = Lists_GetNext(list_item);
 896                         }
 897                 break;
 898         case 'L':       /* Link status (servers and user links) */
 899                 if (!Op_Check(from, Req))
 900                         return Op_NoPrivileges(from, Req);
 901                 more_links = true;
 902
 903         case 'l':       /* Link status (servers and own link) */
 904                 time_now = time(NULL);
 905                 for (con = Conn_First(); con != NONE; con = Conn_Next(con)) {
 906                         cl = Conn_GetClient(con);
 907                         if (!cl)
 908                                 continue;
 909                         if (Client_Type(cl) == CLIENT_SERVER ||
 910                             cl == Client ||
 911                             (more_links && Client_Type(cl) == CLIENT_USER)) {
 912 #ifdef ZLIB
 913                                 if (Conn_Options(con) & CONN_ZIP) {
 914                                         if (!IRC_WriteStrClient
 915                                             (from, RPL_STATSLINKINFOZIP_MSG,
 916                                              Client_ID(from), Client_Mask(cl),
 917                                              Conn_SendQ(con), Conn_SendMsg(con),
 918                                              Zip_SendBytes(con),
 919                                              Conn_SendBytes(con),
 920                                              Conn_RecvMsg(con),
 921                                              Zip_RecvBytes(con),
 922                                              Conn_RecvBytes(con),
 923                                              (long)(time_now - Conn_StartTime(con))))
 924                                                 return DISCONNECTED;
 925                                         continue;
 926                                 }
 927 #endif
 928                                 if (!IRC_WriteStrClient
 929                                     (from, RPL_STATSLINKINFO_MSG,
 930                                      Client_ID(from), Client_Mask(cl),
 931                                      Conn_SendQ(con), Conn_SendMsg(con),
 932                                      Conn_SendBytes(con), Conn_RecvMsg(con),
 933                                      Conn_RecvBytes(con),
 934                                      (long)(time_now - Conn_StartTime(con))))
 935                                         return DISCONNECTED;
 936                         }
 937                 }
 938                 break;
 939         case 'm':       /* IRC command status (usage count) */
 940         case 'M':
 941                 cmd = Parse_GetCommandStruct();
 942                 for (; cmd->name; cmd++) {
 943                         if (cmd->lcount == 0 && cmd->rcount == 0)
 944                                 continue;
 945                         if (!IRC_WriteStrClient
 946                             (from, RPL_STATSCOMMANDS_MSG, Client_ID(from),
 947                              cmd->name, cmd->lcount, cmd->bytes, cmd->rcount))
 948                                 return DISCONNECTED;
 949                 }
 950                 break;
 951         case 'u':       /* Server uptime */
 952         case 'U':
 953                 time_now = time(NULL) - NGIRCd_Start;
 954                 days = uptime_days(&time_now);
 955                 hrs = uptime_hrs(&time_now);
 956                 mins = uptime_mins(&time_now);
 957                 if (!IRC_WriteStrClient(from, RPL_STATSUPTIME, Client_ID(from),
 958                                        days, hrs, mins, (unsigned int)time_now))
 959                         return DISCONNECTED;
 960                 break;
 961         }
 962
 963         return IRC_WriteStrClient(from, RPL_ENDOFSTATS_MSG,
 964                                   Client_ID(from), query);
 965 } /* IRC_STATS */
 966
 967 /**
 968  * Handler for the IRC command "SUMMON".
 969  *
 970  * @param Client The client from which this command has been received.
 971  * @param Req Request structure with prefix and all parameters.
 972  * @return CONNECTED or DISCONNECTED.
 973  */
 974 GLOBAL bool
 975 IRC_SUMMON(CLIENT * Client, UNUSED REQUEST * Req)
 976 {
 977         assert(Client != NULL);
 978
 979         return IRC_WriteErrClient(Client, ERR_SUMMONDISABLED_MSG,
 980                                   Client_ID(Client));
 981 } /* IRC_SUMMON */
 982
 983 /**
 984  * Handler for the IRC command "TIME".
 985  *
 986  * @param Client The client from which this command has been received.
 987  * @param Req Request structure with prefix and all parameters.
 988  * @return CONNECTED or DISCONNECTED.
 989  */
 990 GLOBAL bool
 991 IRC_TIME( CLIENT *Client, REQUEST *Req )
 992 {
 993         CLIENT *from, *target;
 994         char t_str[64];
 995         time_t t;
 996
 997         assert(Client != NULL);
 998         assert(Req != NULL);
 999
1000         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
1001         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from)
1002
1003         /* Forward? */
1004         if (target != Client_ThisServer()) {
1005                 IRC_WriteStrClientPrefix(target, from, "TIME %s",
1006                                          Client_ID(target));
1007                 return CONNECTED;
1008         }
1009
1010         t = time( NULL );
1011         (void)strftime(t_str, 60, "%A %B %d %Y -- %H:%M %Z", localtime(&t));
1012         return IRC_WriteStrClient(from, RPL_TIME_MSG, Client_ID(from),
1013                                   Client_ID(Client_ThisServer()), t_str);
1014 } /* IRC_TIME */
1015
1016 /**
1017  * Handler for the IRC command "USERHOST".
1018  *
1019  * @param Client The client from which this command has been received.
1020  * @param Req Request structure with prefix and all parameters.
1021  * @return CONNECTED or DISCONNECTED.
1022  */
1023 GLOBAL bool
1024 IRC_USERHOST(CLIENT *Client, REQUEST *Req)
1025 {
1026         char rpl[COMMAND_LEN];
1027         CLIENT *c;
1028         int max, i;
1029
1030         assert(Client != NULL);
1031         assert(Req != NULL);
1032
1033         if (Req->argc > 5)
1034                 max = 5;
1035         else
1036                 max = Req->argc;
1037
1038         strlcpy(rpl, RPL_USERHOST_MSG, sizeof rpl);
1039         for (i = 0; i < max; i++) {
1040                 c = Client_Search(Req->argv[i]);
1041                 if (c && (Client_Type(c) == CLIENT_USER)) {
1042                         /* This Nick is "online" */
1043                         strlcat(rpl, Client_ID(c), sizeof(rpl));
1044                         if (Client_HasMode(c, 'o'))
1045                                 strlcat(rpl, "*", sizeof(rpl));
1046                         strlcat(rpl, "=", sizeof(rpl));
1047                         if (Client_HasMode(c, 'a'))
1048                                 strlcat(rpl, "-", sizeof(rpl));
1049                         else
1050                                 strlcat(rpl, "+", sizeof(rpl));
1051                         strlcat(rpl, Client_User(c), sizeof(rpl));
1052                         strlcat(rpl, "@", sizeof(rpl));
1053                         strlcat(rpl, Client_HostnameDisplayed(c), sizeof(rpl));
1054                         strlcat(rpl, " ", sizeof(rpl));
1055                 }
1056         }
1057         ngt_TrimLastChr(rpl, ' ');
1058
1059         return IRC_WriteStrClient(Client, rpl, Client_ID(Client));
1060 } /* IRC_USERHOST */
1061
1062 /**
1063  * Handler for the IRC command "USERS".
1064  *
1065  * @param Client The client from which this command has been received.
1066  * @param Req Request structure with prefix and all parameters.
1067  * @return CONNECTED or DISCONNECTED.
1068  */
1069 GLOBAL bool
1070 IRC_USERS(CLIENT * Client, UNUSED REQUEST * Req)
1071 {
1072         assert(Client != NULL);
1073
1074         return IRC_WriteErrClient(Client, ERR_USERSDISABLED_MSG,
1075                                   Client_ID(Client));
1076 } /* IRC_USERS */
1077
1078 /**
1079  * Handler for the IRC command "VERSION".
1080  *
1081  * @param Client The client from which this command has been received.
1082  * @param Req Request structure with prefix and all parameters.
1083  * @return CONNECTED or DISCONNECTED.
1084  */
1085 GLOBAL bool
1086 IRC_VERSION( CLIENT *Client, REQUEST *Req )
1087 {
1088         CLIENT *target, *prefix;
1089
1090         assert( Client != NULL );
1091         assert( Req != NULL );
1092
1093         _IRC_GET_SENDER_OR_RETURN_(prefix, Req, Client)
1094         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, prefix)
1095
1096         /* Forward? */
1097         if (target != Client_ThisServer()) {
1098                 IRC_WriteStrClientPrefix(target, prefix, "VERSION %s",
1099                                          Client_ID(target));
1100                 return CONNECTED;
1101         }
1102
1103         /* send version information */
1104         if (!IRC_WriteStrClient(Client, RPL_VERSION_MSG, Client_ID(prefix),
1105                                 PACKAGE_NAME, PACKAGE_VERSION,
1106                                 NGIRCd_DebugLevel, Conf_ServerName,
1107                                 NGIRCd_VersionAddition))
1108                 return DISCONNECTED;
1109
1110 #ifndef STRICT_RFC
1111         /* send RPL_ISUPPORT(005) numerics */
1112         if (!IRC_Send_ISUPPORT(prefix))
1113                 return DISCONNECTED;
1114 #endif
1115
1116         return CONNECTED;
1117 } /* IRC_VERSION */
1118
1119 /**
1120  * Handler for the IRC "WHO" command.
1121  *
1122  * @param Client The client from which this command has been received.
1123  * @param Req Request structure with prefix and all parameters.
1124  * @return CONNECTED or DISCONNECTED.
1125  */
1126 GLOBAL bool
1127 IRC_WHO(CLIENT *Client, REQUEST *Req)
1128 {
1129         bool only_ops;
1130         CHANNEL *chan;
1131
1132         assert (Client != NULL);
1133         assert (Req != NULL);
1134
1135         only_ops = false;
1136         if (Req->argc == 2) {
1137                 if (strcmp(Req->argv[1], "o") == 0)
1138                         only_ops = true;
1139 #ifdef STRICT_RFC
1140                 else {
1141                         return IRC_WriteErrClient(Client,
1142                                                   ERR_NEEDMOREPARAMS_MSG,
1143                                                   Client_ID(Client),
1144                                                   Req->command);
1145                 }
1146 #endif
1147         }
1148
1149         if (Req->argc >= 1) {
1150                 /* Channel or mask given */
1151                 chan = Channel_Search(Req->argv[0]);
1152                 if (chan) {
1153                         /* Members of a channel have been requested */
1154                         return IRC_WHO_Channel(Client, chan, only_ops);
1155                 }
1156                 if (strcmp(Req->argv[0], "0") != 0) {
1157                         /* A mask has been given. But please note this RFC
1158                          * stupidity: "0" is same as no arguments ... */
1159                         return IRC_WHO_Mask(Client, Req->argv[0], only_ops);
1160                 }
1161         }
1162
1163         /* No channel or (valid) mask given */
1164         return IRC_WHO_Mask(Client, NULL, only_ops);
1165 } /* IRC_WHO */
1166
1167 /**
1168  * Handler for the IRC "WHOIS" command.
1169  *
1170  * @param Client The client from which this command has been received.
1171  * @param Req Request structure with prefix and all parameters.
1172  * @return CONNECTED or DISCONNECTED.
1173  */
1174 GLOBAL bool
1175 IRC_WHOIS( CLIENT *Client, REQUEST *Req )
1176 {
1177         CLIENT *from, *target, *c;
1178         unsigned int match_count = 0, found = 0;
1179         bool has_wildcards, is_remote;
1180         bool got_wildcard = false;
1181         char mask[COMMAND_LEN], *query;
1182
1183         assert( Client != NULL );
1184         assert( Req != NULL );
1185
1186         /* Wrong number of parameters? */
1187         if (Req->argc < 1)
1188                 return IRC_WriteErrClient(Client, ERR_NONICKNAMEGIVEN_MSG,
1189                                           Client_ID(Client));
1190
1191         _IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
1192         _IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
1193
1194         /* Get target server for this command */
1195         if (Req->argc > 1) {
1196                 _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, Client)
1197         } else
1198                 target = Client_ThisServer();
1199
1200         assert(target != NULL);
1201
1202         /* Forward? */
1203         if (target != Client_ThisServer()) {
1204                 IRC_WriteStrClientPrefix(target, from, "WHOIS %s :%s",
1205                                          Req->argv[0], Req->argv[1]);
1206                 return CONNECTED;
1207         }
1208
1209         is_remote = Client_Conn(from) < 0;
1210         strlcpy(mask, Req->argv[Req->argc - 1], sizeof(mask));
1211         for (query = strtok(ngt_LowerStr(mask), ",");
1212                         query && found < 3;
1213                         query = strtok(NULL, ","), found++)
1214         {
1215                 has_wildcards = query[strcspn(query, "*?")] != 0;
1216                 /*
1217                  * follows ircd 2.10 implementation:
1218                  *  - handle up to 3 targets
1219                  *  - no wildcards for remote clients
1220                  *  - only one wildcard target per local client
1221                  *
1222                  *  Also, at most MAX_RPL_WHOIS matches are returned.
1223                  */
1224                 if (!has_wildcards || is_remote) {
1225                         c = Client_Search(query);
1226                         if (c && (Client_Type(c) == CLIENT_USER
1227                                   || Client_Type(c) == CLIENT_SERVICE)) {
1228                                 if (!IRC_WHOIS_SendReply(Client, from, c))
1229                                         return DISCONNECTED;
1230                         } else {
1231                                 if (!IRC_WriteErrClient(Client,
1232                                                         ERR_NOSUCHNICK_MSG,
1233                                                         Client_ID(Client),
1234                                                         query))
1235                                         return DISCONNECTED;
1236                         }
1237                         continue;
1238                 }
1239                 if (got_wildcard) {
1240                         /* we already handled one wildcard query */
1241                         if (!IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
1242                              Client_ID(Client), query))
1243                                 return DISCONNECTED;
1244                         continue;
1245                 }
1246                 got_wildcard = true;
1247                 /* Increase penalty for wildcard queries */
1248                 IRC_SetPenalty(Client, 3);
1249
1250                 for (c = Client_First(); c; c = Client_Next(c)) {
1251                         if (IRC_CheckListTooBig(Client, match_count,
1252                                             MAX_RPL_WHOIS, "WHOIS"))
1253                                 break;
1254
1255                         if (Client_Type(c) != CLIENT_USER)
1256                                 continue;
1257                         if (!MatchCaseInsensitive(query, Client_ID(c)))
1258                                 continue;
1259                         if (!IRC_WHOIS_SendReply(Client, from, c))
1260                                 return DISCONNECTED;
1261
1262                         match_count++;
1263                 }
1264
1265                 if (match_count == 0)
1266                         IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
1267                                            Client_ID(Client),
1268                                            Req->argv[Req->argc - 1]);
1269         }
1270         return IRC_WriteStrClient(from, RPL_ENDOFWHOIS_MSG,
1271                                   Client_ID(from), Req->argv[Req->argc - 1]);
1272 } /* IRC_WHOIS */
1273
1274 /**
1275  * Handler for the IRC "WHOWAS" command.
1276  *
1277  * @param Client The client from which this command has been received.
1278  * @param Req Request structure with prefix and all parameters.
1279  * @return CONNECTED or DISCONNECTED.
1280  */
1281 GLOBAL bool
1282 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
1283 {
1284         CLIENT *target, *prefix;
1285         WHOWAS *whowas;
1286         char tok_buf[COMMAND_LEN];
1287         int max, last, count, i, nc;
1288         const char *nick;
1289
1290         assert( Client != NULL );
1291         assert( Req != NULL );
1292
1293         /* Wrong number of parameters? */
1294         if (Req->argc < 1)
1295                 return IRC_WriteErrClient(Client, ERR_NONICKNAMEGIVEN_MSG,
1296                                           Client_ID(Client));
1297
1298         _IRC_ARGC_LE_OR_RETURN_(Client, Req, 3)
1299         _IRC_GET_SENDER_OR_RETURN_(prefix, Req, Client)
1300         _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 2, prefix)
1301
1302         /* Do not reveal any info on disconnected users? */
1303         if (Conf_MorePrivacy)
1304                 return CONNECTED;
1305
1306         /* Forward? */
1307         if (target != Client_ThisServer()) {
1308                 IRC_WriteStrClientPrefix(target, prefix, "WHOWAS %s %s %s",
1309                                          Req->argv[0], Req->argv[1],
1310                                          Client_ID(target));
1311                 return CONNECTED;
1312         }
1313
1314         whowas = Client_GetWhowas( );
1315         last = Client_GetLastWhowasIndex( );
1316         if (last < 0)
1317                 last = 0;
1318
1319         max = DEF_RPL_WHOWAS;
1320         if (Req->argc > 1) {
1321                 max = atoi(Req->argv[1]);
1322                 if (max < 1)
1323                         max = MAX_RPL_WHOWAS;
1324         }
1325
1326         /*
1327          * Break up the nick argument into a list of nicks, if applicable
1328          * Can't modify Req->argv[0] because we need it for RPL_ENDOFWHOWAS_MSG.
1329          */
1330         strlcpy(tok_buf, Req->argv[0], sizeof(tok_buf));
1331         nick = strtok(tok_buf, ",");
1332
1333         for (i=last, count=0; nick != NULL ; nick = strtok(NULL, ",")) {
1334                 nc = 0;
1335                 do {
1336                         /* Used entry? */
1337                         if (whowas[i].time > 0 && strcasecmp(nick, whowas[i].id) == 0) {
1338                                 if (!WHOWAS_EntryWrite(prefix, &whowas[i]))
1339                                         return DISCONNECTED;
1340                                 nc++;
1341                                 count++;
1342                         }
1343                         /* previous entry */
1344                         i--;
1345
1346                         /* "underflow", wrap around */
1347                         if (i < 0)
1348                                 i = MAX_WHOWAS - 1;
1349
1350                         if (nc && count >= max)
1351                                 break;
1352                 } while (i != last);
1353
1354                 if (nc == 0 && !IRC_WriteErrClient(prefix, ERR_WASNOSUCHNICK_MSG,
1355                                                 Client_ID(prefix), nick))
1356                         return DISCONNECTED;
1357         }
1358         return IRC_WriteStrClient(prefix, RPL_ENDOFWHOWAS_MSG,
1359                                   Client_ID(prefix), Req->argv[0]);
1360 } /* IRC_WHOWAS */
1361
1362 /**
1363  * Send LUSERS reply to a client.
1364  *
1365  * @param Client The receipient of the information.
1366  * @return CONNECTED or DISCONNECTED.
1367  */
1368 GLOBAL bool
1369 IRC_Send_LUSERS(CLIENT *Client)
1370 {
1371         unsigned long cnt;
1372 #ifndef STRICT_RFC
1373         unsigned long max;
1374 #endif
1375
1376         assert(Client != NULL);
1377
1378         /* Users, services and servers in the network */
1379         if (!IRC_WriteStrClient(Client, RPL_LUSERCLIENT_MSG, Client_ID(Client),
1380                                 Client_UserCount(), Client_ServiceCount(),
1381                                 Client_ServerCount()))
1382                 return DISCONNECTED;
1383
1384         /* Number of IRC operators */
1385         cnt = Client_OperCount( );
1386         if (cnt > 0) {
1387                 if (!IRC_WriteStrClient(Client, RPL_LUSEROP_MSG,
1388                                         Client_ID(Client), cnt))
1389                         return DISCONNECTED;
1390         }
1391
1392         /* Unknown connections */
1393         cnt = Client_UnknownCount( );
1394         if (cnt > 0) {
1395                 if (!IRC_WriteStrClient(Client, RPL_LUSERUNKNOWN_MSG,
1396                                         Client_ID(Client), cnt))
1397                         return DISCONNECTED;
1398         }
1399
1400         /* Number of created channels */
1401         if (!IRC_WriteStrClient(Client, RPL_LUSERCHANNELS_MSG,
1402                                 Client_ID(Client),
1403                                 Channel_CountVisible(Client)))
1404                 return DISCONNECTED;
1405
1406         /* Number of local users, services and servers */
1407         if (!IRC_WriteStrClient(Client, RPL_LUSERME_MSG, Client_ID(Client),
1408                                 Client_MyUserCount(), Client_MyServiceCount(),
1409                                 Client_MyServerCount()))
1410                 return DISCONNECTED;
1411
1412 #ifndef STRICT_RFC
1413         /* Maximum number of local users */
1414         cnt = Client_MyUserCount();
1415         max = Client_MyMaxUserCount();
1416         if (! IRC_WriteStrClient(Client, RPL_LOCALUSERS_MSG, Client_ID(Client),
1417                         cnt, max, cnt, max))
1418                 return DISCONNECTED;
1419         /* Maximum number of users in the network */
1420         cnt = Client_UserCount();
1421         max = Client_MaxUserCount();
1422         if(! IRC_WriteStrClient(Client, RPL_NETUSERS_MSG, Client_ID(Client),
1423                         cnt, max, cnt, max))
1424                 return DISCONNECTED;
1425         /* Connection counters */
1426         if (! IRC_WriteStrClient(Client, RPL_STATSCONN_MSG, Client_ID(Client),
1427                         Conn_CountMax(), Conn_CountAccepted()))
1428                 return DISCONNECTED;
1429 #endif
1430
1431         return CONNECTED;
1432 } /* IRC_Send_LUSERS */
1433
1434 GLOBAL bool
1435 IRC_Show_MOTD( CLIENT *Client )
1436 {
1437         const char *line;
1438         size_t len_tot, len_str;
1439
1440         assert( Client != NULL );
1441
1442         len_tot = array_bytes(&Conf_Motd);
1443         if (len_tot == 0 && !Conn_UsesSSL(Client_Conn(Client)))
1444                 return IRC_WriteErrClient(Client, ERR_NOMOTD_MSG, Client_ID(Client));
1445
1446         if (!IRC_WriteStrClient(Client, RPL_MOTDSTART_MSG, Client_ID(Client),
1447                                 Client_ID(Client_ThisServer())))
1448                 return DISCONNECTED;
1449
1450         line = array_start(&Conf_Motd);
1451         while (len_tot > 0) {
1452                 len_str = strlen(line) + 1;
1453
1454                 assert(len_tot >= len_str);
1455                 len_tot -= len_str;
1456
1457                 if (!IRC_WriteStrClient(Client, RPL_MOTD_MSG, Client_ID(Client), line))
1458                         return DISCONNECTED;
1459                 line += len_str;
1460         }
1461
1462         if (!Show_MOTD_SSLInfo(Client))
1463                 return DISCONNECTED;
1464
1465         if (!IRC_WriteStrClient(Client, RPL_ENDOFMOTD_MSG, Client_ID(Client)))
1466                 return DISCONNECTED;
1467
1468         if (*Conf_CloakHost)
1469                 return IRC_WriteStrClient(Client, RPL_HOSTHIDDEN_MSG,
1470                                           Client_ID(Client),
1471                                           Client_Hostname(Client));
1472
1473         return CONNECTED;
1474 } /* IRC_Show_MOTD */
1475
1476 /**
1477  * Send NAMES reply for a specific client and channel.
1478  *
1479  * @param Client The client requesting the NAMES information.
1480  * @param Chan The channel
1481  * @return CONNECTED or DISCONNECTED.
1482  */
1483 GLOBAL bool
1484 IRC_Send_NAMES(CLIENT * Client, CHANNEL * Chan)
1485 {
1486         bool is_visible, is_member;
1487         char str[COMMAND_LEN];
1488         CL2CHAN *cl2chan;
1489         CLIENT *cl;
1490
1491         assert(Client != NULL);
1492         assert(Chan != NULL);
1493
1494         if (Channel_IsMemberOf(Chan, Client))
1495                 is_member = true;
1496         else
1497                 is_member = false;
1498
1499         /* Do not print info on channel memberships to anyone that is not member? */
1500         if (Conf_MorePrivacy && !is_member)
1501                 return CONNECTED;
1502
1503         /* Secret channel? */
1504         if (!is_member && Channel_HasMode(Chan, 's'))
1505                 return CONNECTED;
1506
1507         snprintf(str, sizeof(str), RPL_NAMREPLY_MSG, Client_ID(Client), "=",
1508                  Channel_Name(Chan));
1509         cl2chan = Channel_FirstMember(Chan);
1510         while (cl2chan) {
1511                 cl = Channel_GetClient(cl2chan);
1512
1513                 if (Client_HasMode(cl, 'i'))
1514                         is_visible = false;
1515                 else
1516                         is_visible = true;
1517
1518                 if (is_member || is_visible) {
1519                         if (str[strlen(str) - 1] != ':')
1520                                 strlcat(str, " ", sizeof(str));
1521
1522                         who_flags_qualifier(Client, Channel_UserModes(Chan, cl),
1523                                             str, sizeof(str));
1524                         strlcat(str, Client_ID(cl), sizeof(str));
1525
1526                         if (strlen(str) > (COMMAND_LEN - CLIENT_NICK_LEN - 4)) {
1527                                 if (!IRC_WriteStrClient(Client, "%s", str))
1528                                         return DISCONNECTED;
1529                                 snprintf(str, sizeof(str), RPL_NAMREPLY_MSG,
1530                                          Client_ID(Client), "=",
1531                                          Channel_Name(Chan));
1532                         }
1533                 }
1534
1535                 cl2chan = Channel_NextMember(Chan, cl2chan);
1536         }
1537         if (str[strlen(str) - 1] != ':') {
1538                 if (!IRC_WriteStrClient(Client, "%s", str))
1539                         return DISCONNECTED;
1540         }
1541
1542         return CONNECTED;
1543 } /* IRC_Send_NAMES */
1544
1545 /**
1546  * Send the ISUPPORT numeric (005).
1547  * This numeric indicates the features that are supported by this server.
1548  * See <http://www.irc.org/tech_docs/005.html> for details.
1549  */
1550 GLOBAL bool
1551 IRC_Send_ISUPPORT(CLIENT * Client)
1552 {
1553         if (Conf_Network[0] && !IRC_WriteStrClient(Client, RPL_ISUPPORTNET_MSG,
1554                                                    Client_ID(Client),
1555                                                    Conf_Network))
1556                 return DISCONNECTED;
1557         if (!IRC_WriteStrClient(Client, RPL_ISUPPORT1_MSG, Client_ID(Client),
1558                                 CHANTYPES, CHANTYPES, Conf_MaxJoins))
1559                 return DISCONNECTED;
1560         return IRC_WriteStrClient(Client, RPL_ISUPPORT2_MSG, Client_ID(Client),
1561                                   CHANNEL_NAME_LEN - 1, Conf_MaxNickLength - 1,
1562                                   COMMAND_LEN - 23, CLIENT_AWAY_LEN - 1,
1563                                   COMMAND_LEN - 113, MAX_HNDL_MODES_ARG,
1564                                   MAX_HNDL_CHANNEL_LISTS);
1565 } /* IRC_Send_ISUPPORT */
1566
1567 /* -eof- */