src/ngircd/irc-login.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2011 Alexander Barton (alex@barton.de) and Contributors.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  */
  11
  12 #include "portab.h"
  13
  14 /**
  15  * @file
  16  * Login and logout
  17  */
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <stdlib.h>
  22 #include <strings.h>
  23
  24 #include "conn-func.h"
  25 #include "class.h"
  26 #include "conf.h"
  27 #include "channel.h"
  28 #include "log.h"
  29 #include "login.h"
  30 #include "messages.h"
  31 #include "parse.h"
  32 #include "irc.h"
  33 #include "irc-info.h"
  34 #include "irc-write.h"
  35
  36 #include "exp.h"
  37 #include "irc-login.h"
  38
  39 static void Kill_Nick PARAMS(( char *Nick, char *Reason ));
  40
  41 /**
  42  * Handler for the IRC "PASS" command.
  43  *
  44  * See RFC 2813 section 4.1.1, and RFC 2812 section 3.1.1.
  45  *
  46  * @param Client        The client from which this command has been received.
  47  * @param Req           Request structure with prefix and all parameters.
  48  * @returns             CONNECTED or DISCONNECTED.
  49  */
  50 GLOBAL bool
  51 IRC_PASS( CLIENT *Client, REQUEST *Req )
  52 {
  53         char *type, *orig_flags;
  54         int protohigh, protolow;
  55
  56         assert( Client != NULL );
  57         assert( Req != NULL );
  58
  59         /* Return an error if this is not a local client */
  60         if (Client_Conn(Client) <= NONE)
  61                 return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG,
  62                                           Client_ID(Client), Req->command);
  63
  64         if (Client_Type(Client) == CLIENT_UNKNOWN && Req->argc == 1) {
  65                 /* Not yet registered "unknown" connection, PASS with one
  66                  * argument: either a regular client, service, or server
  67                  * using the old RFC 1459 section 4.1.1 syntax. */
  68                 LogDebug("Connection %d: got PASS command (RFC 1459) ...",
  69                          Client_Conn(Client));
  70         } else if ((Client_Type(Client) == CLIENT_UNKNOWN ||
  71                     Client_Type(Client) == CLIENT_UNKNOWNSERVER) &&
  72                    (Req->argc == 3 || Req->argc == 4)) {
  73                 /* Not yet registered "unknown" connection or outgoing server
  74                  * link, PASS with three or four argument: server using the
  75                  * RFC 2813 section 4.1.1 syntax. */
  76                 LogDebug("Connection %d: got PASS command (RFC 2813, new server link) ...",
  77                          Client_Conn(Client));
  78         } else if (Client_Type(Client) == CLIENT_UNKNOWN ||
  79                    Client_Type(Client) == CLIENT_UNKNOWNSERVER) {
  80                 /* Unregistered connection, but wrong number of arguments: */
  81                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
  82                                           Client_ID(Client), Req->command);
  83         } else {
  84                 /* Registered connection, PASS command is not allowed! */
  85                 return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
  86                                           Client_ID(Client));
  87         }
  88
  89         Client_SetPassword(Client, Req->argv[0]);
  90
  91         /* Protocol version */
  92         if (Req->argc >= 2 && strlen(Req->argv[1]) >= 4) {
  93                 int c2, c4;
  94
  95                 c2 = Req->argv[1][2];
  96                 c4 = Req->argv[1][4];
  97
  98                 Req->argv[1][4] = '\0';
  99                 protolow = atoi(&Req->argv[1][2]);
 100                 Req->argv[1][2] = '\0';
 101                 protohigh = atoi(Req->argv[1]);
 102
 103                 Req->argv[1][2] = c2;
 104                 Req->argv[1][4] = c4;
 105
 106                 Client_SetType(Client, CLIENT_GOTPASS_2813);
 107         } else {
 108                 protohigh = protolow = 0;
 109                 Client_SetType(Client, CLIENT_GOTPASS);
 110         }
 111
 112         /* Protocol type, see doc/Protocol.txt */
 113         if (Req->argc >= 2 && strlen(Req->argv[1]) > 4)
 114                 type = &Req->argv[1][4];
 115         else
 116                 type = NULL;
 117
 118         /* Protocol flags/options */
 119         if (Req->argc >= 4)
 120                 orig_flags = Req->argv[3];
 121         else
 122                 orig_flags = "";
 123
 124         /* Implementation, version and IRC+ flags */
 125         if (Req->argc >= 3) {
 126                 char *impl, *ptr, *serverver, *flags;
 127
 128                 impl = Req->argv[2];
 129                 ptr = strchr(impl, '|');
 130                 if (ptr)
 131                         *ptr = '\0';
 132
 133                 if (type && strcmp(type, PROTOIRCPLUS) == 0) {
 134                         /* The peer seems to be a server which supports the
 135                          * IRC+ protocol (see doc/Protocol.txt). */
 136                         serverver = ptr ? ptr + 1 : "?";
 137                         flags = strchr(ptr ? serverver : impl, ':');
 138                         if (flags) {
 139                                 *flags = '\0';
 140                                 flags++;
 141                         } else
 142                                 flags = "";
 143                         Log(LOG_INFO,
 144                             "Peer on conenction %d announces itself as %s-%s using protocol %d.%d/IRC+ (flags: \"%s\").",
 145                             Client_Conn(Client), impl, serverver,
 146                             protohigh, protolow, flags);
 147                 } else {
 148                         /* The peer seems to be a server supporting the
 149                          * "original" IRC protocol (RFC 2813). */
 150                         if (strchr(orig_flags, 'Z'))
 151                                 flags = "Z";
 152                         else
 153                                 flags = "";
 154                         Log(LOG_INFO,
 155                             "Peer on connection %d announces itself as \"%s\" using protocol %d.%d (flags: \"%s\").",
 156                             Client_Conn(Client), impl,
 157                             protohigh, protolow, flags);
 158                 }
 159                 Client_SetFlags(Client, flags);
 160         }
 161
 162         return CONNECTED;
 163 } /* IRC_PASS */
 164
 165
 166 /**
 167  * Handler for the IRC "NICK" command.
 168  *
 169  * See RFC 2812, 3.1.2 "Nick message", and RFC 2813, 4.1.3 "Nick".
 170  *
 171  * This function implements the IRC command "NICK" which is used to register
 172  * with the server, to change already registered nicknames and to introduce
 173  * new users which are connected to other servers.
 174  *
 175  * @param Client        The client from which this command has been received.
 176  * @param Req           Request structure with prefix and all parameters.
 177  * @returns             CONNECTED or DISCONNECTED.
 178  */
 179 GLOBAL bool
 180 IRC_NICK( CLIENT *Client, REQUEST *Req )
 181 {
 182         CLIENT *intr_c, *target, *c;
 183         char *nick, *user, *hostname, *modes, *info;
 184         int token, hops;
 185
 186         assert( Client != NULL );
 187         assert( Req != NULL );
 188
 189         /* Some IRC clients, for example BitchX, send the NICK and USER
 190          * commands in the wrong order ... */
 191         if(Client_Type(Client) == CLIENT_UNKNOWN
 192             || Client_Type(Client) == CLIENT_GOTPASS
 193             || Client_Type(Client) == CLIENT_GOTNICK
 194 #ifndef STRICT_RFC
 195             || Client_Type(Client) == CLIENT_GOTUSER
 196 #endif
 197             || Client_Type(Client) == CLIENT_USER
 198             || Client_Type(Client) == CLIENT_SERVICE
 199             || (Client_Type(Client) == CLIENT_SERVER && Req->argc == 1))
 200         {
 201                 /* User registration or change of nickname */
 202
 203                 /* Wrong number of arguments? */
 204                 if( Req->argc != 1 )
 205                         return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 206                                                    Client_ID( Client ),
 207                                                    Req->command );
 208
 209                 /* Search "target" client */
 210                 if( Client_Type( Client ) == CLIENT_SERVER )
 211                 {
 212                         target = Client_Search( Req->prefix );
 213                         if( ! target )
 214                                 return IRC_WriteStrClient( Client,
 215                                                            ERR_NOSUCHNICK_MSG,
 216                                                            Client_ID( Client ),
 217                                                            Req->argv[0] );
 218                 }
 219                 else
 220                 {
 221                         /* Is this a restricted client? */
 222                         if( Client_HasMode( Client, 'r' ))
 223                                 return IRC_WriteStrClient( Client,
 224                                                            ERR_RESTRICTED_MSG,
 225                                                            Client_ID( Client ));
 226
 227                         target = Client;
 228                 }
 229
 230 #ifndef STRICT_RFC
 231                 /* If the clients tries to change to its own nickname we won't
 232                  * do anything. This is how the original ircd behaves and some
 233                  * clients (for example Snak) expect it to be like this.
 234                  * But I doubt that this is "really the right thing" ... */
 235                 if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 )
 236                         return CONNECTED;
 237 #endif
 238
 239                 /* Check that the new nickname is available. Special case:
 240                  * the client only changes from/to upper to lower case. */
 241                 if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
 242                 {
 243                         if( ! Client_CheckNick( target, Req->argv[0] ))
 244                                 return CONNECTED;
 245                 }
 246
 247                 if (Client_Type(target) != CLIENT_USER &&
 248                     Client_Type(target) != CLIENT_SERVICE &&
 249                     Client_Type(target) != CLIENT_SERVER) {
 250                         /* New client */
 251                         LogDebug("Connection %d: got valid NICK command ...",
 252                              Client_Conn( Client ));
 253
 254                         /* Register new nickname of this client */
 255                         Client_SetID( target, Req->argv[0] );
 256
 257 #ifndef STRICT_RFC
 258                         if (Conf_AuthPing) {
 259                                 Conn_SetAuthPing(Client_Conn(Client), rand());
 260                                 IRC_WriteStrClient(Client, "PING :%ld",
 261                                         Conn_GetAuthPing(Client_Conn(Client)));
 262                                 LogDebug("Connection %d: sent AUTH PING %ld ...",
 263                                         Client_Conn(Client),
 264                                         Conn_GetAuthPing(Client_Conn(Client)));
 265                         }
 266 #endif
 267
 268                         /* If we received a valid USER command already then
 269                          * register the new client! */
 270                         if( Client_Type( Client ) == CLIENT_GOTUSER )
 271                                 return Login_User( Client );
 272                         else
 273                                 Client_SetType( Client, CLIENT_GOTNICK );
 274                 } else {
 275                         /* Nickname change */
 276                         if (Client_Conn(target) > NONE) {
 277                                 /* Local client */
 278                                 Log(LOG_INFO,
 279                                     "%s \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".",
 280                                     Client_TypeText(target), Client_Mask(target),
 281                                     Client_Conn(target), Client_ID(target),
 282                                     Req->argv[0]);
 283                                 Conn_UpdateIdle(Client_Conn(target));
 284                         } else {
 285                                 /* Remote client */
 286                                 LogDebug("%s \"%s\" changed nick: \"%s\" -> \"%s\".",
 287                                          Client_TypeText(target),
 288                                          Client_Mask(target), Client_ID(target),
 289                                          Req->argv[0]);
 290                         }
 291
 292                         /* Inform all users and servers (which have to know)
 293                          * of this nickname change */
 294                         if( Client_Type( Client ) == CLIENT_USER )
 295                                 IRC_WriteStrClientPrefix( Client, Client,
 296                                                           "NICK :%s",
 297                                                           Req->argv[0] );
 298                         IRC_WriteStrServersPrefix( Client, target,
 299                                                    "NICK :%s", Req->argv[0] );
 300                         IRC_WriteStrRelatedPrefix( target, target, false,
 301                                                    "NICK :%s", Req->argv[0] );
 302
 303                         /* Register old nickname for WHOWAS queries */
 304                         Client_RegisterWhowas( target );
 305
 306                         /* Save new nickname */
 307                         Client_SetID( target, Req->argv[0] );
 308
 309                         IRC_SetPenalty( target, 2 );
 310                 }
 311
 312                 return CONNECTED;
 313         } else if(Client_Type(Client) == CLIENT_SERVER ||
 314                   Client_Type(Client) == CLIENT_SERVICE) {
 315                 /* Server or service introduces new client */
 316
 317                 /* Bad number of parameters? */
 318                 if (Req->argc != 2 && Req->argc != 7)
 319                         return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 320                                                   Client_ID(Client), Req->command);
 321
 322                 if (Req->argc >= 7) {
 323                         /* RFC 2813 compatible syntax */
 324                         nick = Req->argv[0];
 325                         hops = atoi(Req->argv[1]);
 326                         user = Req->argv[2];
 327                         hostname = Req->argv[3];
 328                         token = atoi(Req->argv[4]);
 329                         modes = Req->argv[5] + 1;
 330                         info = Req->argv[6];
 331                 } else {
 332                         /* RFC 1459 compatible syntax */
 333                         nick = Req->argv[0];
 334                         hops = 1;
 335                         user = Req->argv[0];
 336                         hostname = Client_ID(Client);
 337                         token = atoi(Req->argv[1]);
 338                         modes = "";
 339                         info = Req->argv[0];
 340                 }
 341
 342                 c = Client_Search(nick);
 343                 if(c) {
 344                         /*
 345                          * the new nick is already present on this server:
 346                          * the new and the old one have to be disconnected now.
 347                          */
 348                         Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
 349                         Kill_Nick( Req->argv[0], "Nick collision" );
 350                         return CONNECTED;
 351                 }
 352
 353                 /* Find the Server this client is connected to */
 354                 intr_c = Client_GetFromToken(Client, token);
 355                 if( ! intr_c )
 356                 {
 357                         Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
 358                         Kill_Nick( Req->argv[0], "Unknown server" );
 359                         return CONNECTED;
 360                 }
 361
 362                 c = Client_NewRemoteUser(intr_c, nick, hops, user, hostname,
 363                                          token, modes, info, true);
 364                 if( ! c )
 365                 {
 366                         /* out of memory, need to disconnect client to keep network state consistent */
 367                         Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
 368                         Kill_Nick( Req->argv[0], "Server error" );
 369                         return CONNECTED;
 370                 }
 371
 372                 /* RFC 2813: client is now fully registered, inform all the
 373                  * other servers about the new user.
 374                  * RFC 1459: announce the new client only after receiving the
 375                  * USER command, first we need more information! */
 376                 if (Req->argc < 7) {
 377                         LogDebug("Client \"%s\" is being registered (RFC 1459) ...",
 378                                  Client_Mask(c));
 379                         Client_SetType(c, CLIENT_GOTNICK);
 380                 } else
 381                         Client_Introduce(Client, c, CLIENT_USER);
 382
 383                 return CONNECTED;
 384         }
 385         else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
 386 } /* IRC_NICK */
 387
 388
 389 /**
 390  * Handler for the IRC "USER" command.
 391  *
 392  * See RFC 2812, 3.1.3 "User message".
 393  *
 394  * @param Client        The client from which this command has been received.
 395  * @param Req           Request structure with prefix and all parameters.
 396  * @returns             CONNECTED or DISCONNECTED.
 397  */
 398 GLOBAL bool
 399 IRC_USER(CLIENT * Client, REQUEST * Req)
 400 {
 401         CLIENT *c;
 402 #ifdef IDENTAUTH
 403         char *ptr;
 404 #endif
 405
 406         assert(Client != NULL);
 407         assert(Req != NULL);
 408
 409         if (Client_Type(Client) == CLIENT_GOTNICK ||
 410 #ifndef STRICT_RFC
 411             Client_Type(Client) == CLIENT_UNKNOWN ||
 412 #endif
 413             Client_Type(Client) == CLIENT_GOTPASS)
 414         {
 415                 /* New connection */
 416                 if (Req->argc != 4)
 417                         return IRC_WriteStrClient(Client,
 418                                                   ERR_NEEDMOREPARAMS_MSG,
 419                                                   Client_ID(Client),
 420                                                   Req->command);
 421
 422                 /* User name */
 423 #ifdef IDENTAUTH
 424                 ptr = Client_User(Client);
 425                 if (!ptr || !*ptr || *ptr == '~')
 426                         Client_SetUser(Client, Req->argv[0], false);
 427 #else
 428                 Client_SetUser(Client, Req->argv[0], false);
 429 #endif
 430                 Client_SetOrigUser(Client, Req->argv[0]);
 431
 432                 /* "Real name" or user info text: Don't set it to the empty
 433                  * string, the original ircd can't deal with such "real names"
 434                  * (e. g. "USER user * * :") ... */
 435                 if (*Req->argv[3])
 436                         Client_SetInfo(Client, Req->argv[3]);
 437                 else
 438                         Client_SetInfo(Client, "-");
 439
 440                 LogDebug("Connection %d: got valid USER command ...",
 441                     Client_Conn(Client));
 442                 if (Client_Type(Client) == CLIENT_GOTNICK)
 443                         return Login_User(Client);
 444                 else
 445                         Client_SetType(Client, CLIENT_GOTUSER);
 446                 return CONNECTED;
 447
 448         } else if (Client_Type(Client) == CLIENT_SERVER ||
 449                    Client_Type(Client) == CLIENT_SERVICE) {
 450                 /* Server/service updating an user */
 451                 if (Req->argc != 4)
 452                         return IRC_WriteStrClient(Client,
 453                                                   ERR_NEEDMOREPARAMS_MSG,
 454                                                   Client_ID(Client),
 455                                                   Req->command);
 456                 c = Client_Search(Req->prefix);
 457                 if (!c)
 458                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 459                                                   Client_ID(Client),
 460                                                   Req->prefix);
 461
 462                 Client_SetUser(c, Req->argv[0], true);
 463                 Client_SetOrigUser(c, Req->argv[0]);
 464                 Client_SetHostname(c, Req->argv[1]);
 465                 Client_SetInfo(c, Req->argv[3]);
 466
 467                 LogDebug("Connection %d: got valid USER command for \"%s\".",
 468                          Client_Conn(Client), Client_Mask(c));
 469
 470                 /* RFC 1459 style user registration?
 471                  * Introduce client to network: */
 472                 if (Client_Type(c) == CLIENT_GOTNICK)
 473                         Client_Introduce(Client, c, CLIENT_USER);
 474
 475                 return CONNECTED;
 476         } else if (Client_Type(Client) == CLIENT_USER) {
 477                 /* Already registered connection */
 478                 return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
 479                                           Client_ID(Client));
 480         } else {
 481                 /* Unexpected/invalid connection state? */
 482                 return IRC_WriteStrClient(Client, ERR_NOTREGISTERED_MSG,
 483                                           Client_ID(Client));
 484         }
 485 } /* IRC_USER */
 486
 487
 488 /**
 489  * Handler for the IRC "SERVICE" command.
 490  *
 491  * This function implements IRC Services registration using the SERVICE command
 492  * defined in RFC 2812 3.1.6 and RFC 2813 4.1.4.
 493  *
 494  * At the moment ngIRCd doesn't support directly linked services, so this
 495  * function returns ERR_ERRONEUSNICKNAME when the SERVICE command has not been
 496  * received from a peer server.
 497  *
 498  * @param Client        The client from which this command has been received.
 499  * @param Req           Request structure with prefix and all parameters.
 500  * @returns             CONNECTED or DISCONNECTED..
 501  */
 502 GLOBAL bool
 503 IRC_SERVICE(CLIENT *Client, REQUEST *Req)
 504 {
 505         CLIENT *c, *intr_c;
 506         char *nick, *user, *host, *info, *modes, *ptr;
 507         int token, hops;
 508
 509         assert(Client != NULL);
 510         assert(Req != NULL);
 511
 512         if (Client_Type(Client) != CLIENT_GOTPASS &&
 513             Client_Type(Client) != CLIENT_SERVER)
 514                 return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
 515                                           Client_ID(Client));
 516
 517         if (Req->argc != 6)
 518                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 519                                           Client_ID(Client), Req->command);
 520
 521         if (Client_Type(Client) != CLIENT_SERVER)
 522                 return IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG,
 523                                   Client_ID(Client), Req->argv[0]);
 524
 525         /* Bad number of parameters? */
 526         if (Req->argc != 6)
 527                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 528                                           Client_ID(Client), Req->command);
 529
 530         nick = Req->argv[0];
 531         user = NULL; host = NULL;
 532         token = atoi(Req->argv[1]);
 533         hops = atoi(Req->argv[4]);
 534         info = Req->argv[5];
 535
 536         /* Validate service name ("nick name") */
 537         c = Client_Search(nick);
 538         if(c) {
 539                 /* Nick name collission: disconnect (KILL) both clients! */
 540                 Log(LOG_ERR, "Server %s introduces already registered service \"%s\"!",
 541                     Client_ID(Client), nick);
 542                 Kill_Nick(nick, "Nick collision");
 543                 return CONNECTED;
 544         }
 545
 546         /* Get the server to which the service is connected */
 547         intr_c = Client_GetFromToken(Client, token);
 548         if (! intr_c) {
 549                 Log(LOG_ERR, "Server %s introduces service \"%s\" on unknown server!?",
 550                     Client_ID(Client), nick);
 551                 Kill_Nick(nick, "Unknown server");
 552                 return CONNECTED;
 553         }
 554
 555         /* Get user and host name */
 556         ptr = strchr(nick, '@');
 557         if (ptr) {
 558                 *ptr = '\0';
 559                 host = ++ptr;
 560         }
 561         if (!host)
 562                 host = Client_Hostname(intr_c);
 563         ptr = strchr(nick, '!');
 564         if (ptr) {
 565                 *ptr = '\0';
 566                 user = ++ptr;
 567         }
 568         if (!user)
 569                 user = nick;
 570
 571         /* According to RFC 2812/2813 parameter 4 <type> "is currently reserved
 572          * for future usage"; but we use it to transfer the modes and check
 573          * that the first character is a '+' sign and ignore it otherwise. */
 574         modes = (Req->argv[3][0] == '+') ? ++Req->argv[3] : "";
 575
 576         c = Client_NewRemoteUser(intr_c, nick, hops, user, host,
 577                                  token, modes, info, true);
 578         if (! c) {
 579                 /* Couldn't create client structure, so KILL the service to
 580                  * keep network status consistent ... */
 581                 Log(LOG_ALERT, "Can't create client structure! (on connection %d)",
 582                     Client_Conn(Client));
 583                 Kill_Nick(nick, "Server error");
 584                 return CONNECTED;
 585         }
 586
 587         Client_Introduce(Client, c, CLIENT_SERVICE);
 588         return CONNECTED;
 589 } /* IRC_SERVICE */
 590
 591
 592 /**
 593  * Handler for the IRC "WEBIRC" command.
 594  *
 595  * See doc/Protocol.txt, section II.4:
 596  * "Update webchat/proxy client information".
 597  *
 598  * @param Client        The client from which this command has been received.
 599  * @param Req           Request structure with prefix and all parameters.
 600  * @returns             CONNECTED or DISCONNECTED.
 601  */
 602 GLOBAL bool
 603 IRC_WEBIRC(CLIENT *Client, REQUEST *Req)
 604 {
 605         /* Exactly 4 parameters are requited */
 606         if (Req->argc != 4)
 607                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 608                                           Client_ID(Client), Req->command);
 609
 610         if (!Conf_WebircPwd[0] || strcmp(Req->argv[0], Conf_WebircPwd) != 0)
 611                 return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG,
 612                                           Client_ID(Client));
 613
 614         LogDebug("Connection %d: got valid WEBIRC command: user=%s, host=%s, ip=%s",
 615                  Client_Conn(Client), Req->argv[1], Req->argv[2], Req->argv[3]);
 616
 617         Client_SetUser(Client, Req->argv[1], true);
 618         Client_SetOrigUser(Client, Req->argv[1]);
 619         Client_SetHostname(Client, Req->argv[2]);
 620         return CONNECTED;
 621 } /* IRC_WEBIRC */
 622
 623
 624 /**
 625  * Handler for the IRC "QUIT" command.
 626  *
 627  * See RFC 2812, 3.1.7 "Quit", and RFC 2813, 4.1.5 "Quit".
 628  *
 629  * @param Client        The client from which this command has been received.
 630  * @param Req           Request structure with prefix and all parameters.
 631  * @returns             CONNECTED or DISCONNECTED.
 632  */
 633 GLOBAL bool
 634 IRC_QUIT( CLIENT *Client, REQUEST *Req )
 635 {
 636         CLIENT *target;
 637         char quitmsg[LINE_LEN];
 638
 639         assert(Client != NULL);
 640         assert(Req != NULL);
 641
 642         /* Wrong number of arguments? */
 643         if (Req->argc > 1)
 644                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 645                                           Client_ID(Client), Req->command);
 646
 647         if (Req->argc == 1)
 648                 strlcpy(quitmsg, Req->argv[0], sizeof quitmsg);
 649
 650         if (Client_Type(Client) == CLIENT_SERVER) {
 651                 /* Server */
 652                 target = Client_Search(Req->prefix);
 653                 if (!target) {
 654                         Log(LOG_WARNING,
 655                             "Got QUIT from %s for unknown client!?",
 656                             Client_ID(Client));
 657                         return CONNECTED;
 658                 }
 659
 660                 if (target != Client) {
 661                         Client_Destroy(target, "Got QUIT command.",
 662                                        Req->argc == 1 ? quitmsg : NULL, true);
 663                         return CONNECTED;
 664                 } else {
 665                         Conn_Close(Client_Conn(Client), "Got QUIT command.",
 666                                    Req->argc == 1 ? quitmsg : NULL, true);
 667                         return DISCONNECTED;
 668                 }
 669         } else {
 670                 if (Req->argc == 1 && quitmsg[0] != '\"') {
 671                         /* " " to avoid confusion */
 672                         strlcpy(quitmsg, "\"", sizeof quitmsg);
 673                         strlcat(quitmsg, Req->argv[0], sizeof quitmsg-1);
 674                         strlcat(quitmsg, "\"", sizeof quitmsg );
 675                 }
 676
 677                 /* User, Service, or not yet registered */
 678                 Conn_Close(Client_Conn(Client), "Got QUIT command.",
 679                            Req->argc == 1 ? quitmsg : NULL, true);
 680
 681                 return DISCONNECTED;
 682         }
 683 } /* IRC_QUIT */
 684
 685
 686 #ifndef STRICT_RFC
 687
 688 /**
 689  * Handler for HTTP command, e.g. GET and POST
 690  *
 691  * We handle these commands here to avoid the quite long timeout when
 692  * some user tries to access this IRC daemon using an web browser ...
 693  *
 694  * @param Client        The client from which this command has been received.
 695  * @param Req           Request structure with prefix and all parameters.
 696  * @returns             CONNECTED or DISCONNECTED.
 697  */
 698 GLOBAL bool
 699 IRC_QUIT_HTTP( CLIENT *Client, REQUEST *Req )
 700 {
 701         Req->argc = 1;
 702         Req->argv[0] = "Oops, HTTP request received? This is IRC!";
 703         return IRC_QUIT(Client, Req);
 704 } /* IRC_QUIT_HTTP */
 705
 706 #endif
 707
 708
 709 /**
 710  * Handler for the IRC "PING" command.
 711  *
 712  * See RFC 2812, 3.7.2 "Ping message".
 713  *
 714  * @param Client        The client from which this command has been received.
 715  * @param Req           Request structure with prefix and all parameters.
 716  * @returns             CONNECTED or DISCONNECTED.
 717  */
 718 GLOBAL bool
 719 IRC_PING(CLIENT *Client, REQUEST *Req)
 720 {
 721         CLIENT *target, *from;
 722
 723         assert(Client != NULL);
 724         assert(Req != NULL);
 725
 726         if (Req->argc < 1)
 727                 return IRC_WriteStrClient(Client, ERR_NOORIGIN_MSG,
 728                                           Client_ID(Client));
 729 #ifdef STRICT_RFC
 730         /* Don't ignore additional arguments when in "strict" mode */
 731         if (Req->argc > 2)
 732                  return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 733                                            Client_ID(Client), Req->command);
 734 #endif
 735
 736         if (Req->argc > 1) {
 737                 /* A target has been specified ... */
 738                 target = Client_Search(Req->argv[1]);
 739
 740                 if (!target || Client_Type(target) != CLIENT_SERVER)
 741                         return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 742                                         Client_ID(Client), Req->argv[1]);
 743
 744                 if (target != Client_ThisServer()) {
 745                         /* Ok, we have to forward the PING */
 746                         if (Client_Type(Client) == CLIENT_SERVER)
 747                                 from = Client_Search(Req->prefix);
 748                         else
 749                                 from = Client;
 750                         if (!from)
 751                                 return IRC_WriteStrClient(Client,
 752                                                 ERR_NOSUCHSERVER_MSG,
 753                                                 Client_ID(Client), Req->prefix);
 754
 755                         return IRC_WriteStrClientPrefix(target, from,
 756                                         "PING %s :%s", Req->argv[0],
 757                                         Req->argv[1] );
 758                 }
 759         }
 760
 761         if (Client_Type(Client) == CLIENT_SERVER) {
 762                 if (Req->prefix)
 763                         from = Client_Search(Req->prefix);
 764                 else
 765                         from = Client;
 766         } else
 767                 from = Client_ThisServer();
 768         if (!from)
 769                 return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 770                                         Client_ID(Client), Req->prefix);
 771
 772         Log(LOG_DEBUG, "Connection %d: got PING, sending PONG ...",
 773             Client_Conn(Client));
 774
 775 #ifdef STRICT_RFC
 776         return IRC_WriteStrClient(Client, "PONG %s :%s",
 777                 Client_ID(from), Client_ID(Client));
 778 #else
 779         /* Some clients depend on the argument being returned in the PONG
 780          * reply (not mentioned in any RFC, though) */
 781         return IRC_WriteStrClient(Client, "PONG %s :%s",
 782                 Client_ID(from), Req->argv[0]);
 783 #endif
 784 } /* IRC_PING */
 785
 786
 787 /**
 788  * Handler for the IRC "PONG" command.
 789  *
 790  * See RFC 2812, 3.7.3 "Pong message".
 791  *
 792  * @param Client        The client from which this command has been received.
 793  * @param Req           Request structure with prefix and all parameters.
 794  * @returns             CONNECTED or DISCONNECTED.
 795  */
 796 GLOBAL bool
 797 IRC_PONG(CLIENT *Client, REQUEST *Req)
 798 {
 799         CLIENT *target, *from;
 800         CONN_ID conn;
 801 #ifndef STRICT_RFC
 802         long auth_ping;
 803 #endif
 804         char *s;
 805
 806         assert(Client != NULL);
 807         assert(Req != NULL);
 808
 809         /* Wrong number of arguments? */
 810         if (Req->argc < 1) {
 811                 if (Client_Type(Client) == CLIENT_USER)
 812                         return IRC_WriteStrClient(Client, ERR_NOORIGIN_MSG,
 813                                                   Client_ID(Client));
 814                 else
 815                         return CONNECTED;
 816         }
 817         if (Req->argc > 2) {
 818                 if (Client_Type(Client) == CLIENT_USER)
 819                         return IRC_WriteStrClient(Client,
 820                                                   ERR_NEEDMOREPARAMS_MSG,
 821                                                   Client_ID(Client),
 822                                                   Req->command);
 823                 else
 824                         return CONNECTED;
 825         }
 826
 827         /* Forward? */
 828         if (Req->argc == 2 && Client_Type(Client) == CLIENT_SERVER) {
 829                 target = Client_Search(Req->argv[0]);
 830                 if (!target)
 831                         return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 832                                         Client_ID(Client), Req->argv[0]);
 833
 834                 from = Client_Search(Req->prefix);
 835
 836                 if (target != Client_ThisServer() && target != from) {
 837                         /* Ok, we have to forward the message. */
 838                         if (!from)
 839                                 return IRC_WriteStrClient(Client,
 840                                                 ERR_NOSUCHSERVER_MSG,
 841                                                 Client_ID(Client), Req->prefix);
 842
 843                         if (Client_Type(Client_NextHop(target)) != CLIENT_SERVER)
 844                                 s = Client_ID(from);
 845                         else
 846                                 s = Req->argv[0];
 847                         return IRC_WriteStrClientPrefix(target, from,
 848                                  "PONG %s :%s", s, Req->argv[1]);
 849                 }
 850         }
 851
 852         /* The connection timestamp has already been updated when the data has
 853          * been read from so socket, so we don't need to update it here. */
 854
 855         conn = Client_Conn(Client);
 856
 857 #ifndef STRICT_RFC
 858         /* Check authentication PING-PONG ... */
 859         auth_ping = Conn_GetAuthPing(conn);
 860         if (auth_ping) {
 861                 LogDebug("AUTH PONG: waiting for token \"%ld\", got \"%s\" ...",
 862                          auth_ping, Req->argv[0]);
 863                 if (auth_ping == atoi(Req->argv[0])) {
 864                         Conn_SetAuthPing(conn, 0);
 865                         if (Client_Type(Client) == CLIENT_WAITAUTHPING)
 866                                 Login_User(Client);
 867                 } else
 868                         if (!IRC_WriteStrClient(Client,
 869                                         "To connect, type /QUOTE PONG %ld",
 870                                         auth_ping))
 871                                 return DISCONNECTED;
 872         }
 873 #endif
 874
 875         if (Client_Type(Client) == CLIENT_SERVER && Conn_LastPing(conn) == 0) {
 876                 Log(LOG_INFO,
 877                     "Synchronization with \"%s\" done (connection %d): %ld seconds [%ld users, %ld channels]",
 878                     Client_ID(Client), conn, time(NULL) - Conn_GetSignon(conn),
 879                     Client_UserCount(), Channel_CountVisible(NULL));
 880                 Conn_UpdatePing(conn);
 881         } else
 882                 LogDebug("Connection %d: received PONG. Lag: %ld seconds.",
 883                          conn, time(NULL) - Conn_LastPing(conn));
 884
 885         return CONNECTED;
 886 } /* IRC_PONG */
 887
 888
 889 /**
 890  * Kill all users with a specific nick name in the network.
 891  *
 892  * @param Nick          Nick name.
 893  * @param Reason        Reason for the KILL.
 894  */
 895 static void
 896 Kill_Nick(char *Nick, char *Reason)
 897 {
 898         REQUEST r;
 899
 900         assert (Nick != NULL);
 901         assert (Reason != NULL);
 902
 903         r.prefix = NULL;
 904         r.argv[0] = Nick;
 905         r.argv[1] = Reason;
 906         r.argc = 2;
 907
 908         Log(LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s",
 909             Nick, Reason);
 910
 911         IRC_KILL(Client_ThisServer(), &r);
 912 } /* Kill_Nick */
 913
 914
 915 /* -eof- */