src/ngircd/irc-login.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  */
  11
  12 #include "portab.h"
  13
  14 /**
  15  * @file
  16  * Login and logout
  17  */
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <ctype.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <strings.h>
  25
  26 #include "conn-func.h"
  27 #include "class.h"
  28 #include "conf.h"
  29 #include "channel.h"
  30 #include "log.h"
  31 #include "login.h"
  32 #include "messages.h"
  33 #include "parse.h"
  34 #include "irc.h"
  35 #include "irc-info.h"
  36 #include "irc-macros.h"
  37 #include "irc-write.h"
  38
  39 #include "exp.h"
  40 #include "irc-login.h"
  41
  42 static void Kill_Nick PARAMS((char *Nick, char *Reason));
  43 static void Change_Nick PARAMS((CLIENT * Origin, CLIENT * Target, char *NewNick,
  44                                 bool InformClient));
  45
  46 /**
  47  * Handler for the IRC "PASS" command.
  48  *
  49  * @param Client The client from which this command has been received.
  50  * @param Req Request structure with prefix and all parameters.
  51  * @return CONNECTED or DISCONNECTED.
  52  */
  53 GLOBAL bool
  54 IRC_PASS( CLIENT *Client, REQUEST *Req )
  55 {
  56         char *type, *orig_flags;
  57         int protohigh, protolow;
  58
  59         assert( Client != NULL );
  60         assert( Req != NULL );
  61
  62         /* Return an error if this is not a local client */
  63         if (Client_Conn(Client) <= NONE)
  64                 return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG,
  65                                           Client_ID(Client), Req->command);
  66
  67         if (Client_Type(Client) == CLIENT_UNKNOWN && Req->argc == 1) {
  68                 /* Not yet registered "unknown" connection, PASS with one
  69                  * argument: either a regular client, service, or server
  70                  * using the old RFC 1459 section 4.1.1 syntax. */
  71                 LogDebug("Connection %d: got PASS command (RFC 1459) ...",
  72                          Client_Conn(Client));
  73         } else if ((Client_Type(Client) == CLIENT_UNKNOWN ||
  74                     Client_Type(Client) == CLIENT_UNKNOWNSERVER) &&
  75                    (Req->argc == 3 || Req->argc == 4)) {
  76                 /* Not yet registered "unknown" connection or outgoing server
  77                  * link, PASS with three or four argument: server using the
  78                  * RFC 2813 section 4.1.1 syntax. */
  79                 LogDebug("Connection %d: got PASS command (RFC 2813, new server link) ...",
  80                          Client_Conn(Client));
  81         } else if (Client_Type(Client) == CLIENT_UNKNOWN ||
  82                    Client_Type(Client) == CLIENT_UNKNOWNSERVER) {
  83                 /* Unregistered connection, but wrong number of arguments: */
  84                 IRC_SetPenalty(Client, 2);
  85                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
  86                                           Client_ID(Client), Req->command);
  87         } else {
  88                 /* Registered connection, PASS command is not allowed! */
  89                 IRC_SetPenalty(Client, 2);
  90                 return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
  91                                           Client_ID(Client));
  92         }
  93
  94         Conn_SetPassword(Client_Conn(Client), Req->argv[0]);
  95
  96         /* Protocol version */
  97         if (Req->argc >= 2 && strlen(Req->argv[1]) >= 4) {
  98                 int c2, c4;
  99
 100                 c2 = Req->argv[1][2];
 101                 c4 = Req->argv[1][4];
 102
 103                 Req->argv[1][4] = '\0';
 104                 protolow = atoi(&Req->argv[1][2]);
 105                 Req->argv[1][2] = '\0';
 106                 protohigh = atoi(Req->argv[1]);
 107
 108                 Req->argv[1][2] = c2;
 109                 Req->argv[1][4] = c4;
 110
 111                 Client_SetType(Client, CLIENT_GOTPASS_2813);
 112         } else {
 113                 protohigh = protolow = 0;
 114                 Client_SetType(Client, CLIENT_GOTPASS);
 115         }
 116
 117         /* Protocol type, see doc/Protocol.txt */
 118         if (Req->argc >= 2 && strlen(Req->argv[1]) > 4)
 119                 type = &Req->argv[1][4];
 120         else
 121                 type = NULL;
 122
 123         /* Protocol flags/options */
 124         if (Req->argc >= 4)
 125                 orig_flags = Req->argv[3];
 126         else
 127                 orig_flags = "";
 128
 129         /* Implementation, version and IRC+ flags */
 130         if (Req->argc >= 3) {
 131                 char *impl, *ptr, *serverver, *flags;
 132
 133                 impl = Req->argv[2];
 134                 ptr = strchr(impl, '|');
 135                 if (ptr)
 136                         *ptr = '\0';
 137
 138                 if (type && strcmp(type, PROTOIRCPLUS) == 0) {
 139                         /* The peer seems to be a server which supports the
 140                          * IRC+ protocol (see doc/Protocol.txt). */
 141                         serverver = ptr ? ptr + 1 : "?";
 142                         flags = strchr(ptr ? serverver : impl, ':');
 143                         if (flags) {
 144                                 *flags = '\0';
 145                                 flags++;
 146                         } else
 147                                 flags = "";
 148                         Log(LOG_INFO,
 149                             "Peer on connection %d announces itself as %s-%s using protocol %d.%d/IRC+ (flags: \"%s\").",
 150                             Client_Conn(Client), impl, serverver,
 151                             protohigh, protolow, flags);
 152                 } else {
 153                         /* The peer seems to be a server supporting the
 154                          * "original" IRC protocol (RFC 2813). */
 155                         if (strchr(orig_flags, 'Z'))
 156                                 flags = "Z";
 157                         else
 158                                 flags = "";
 159                         Log(LOG_INFO,
 160                             "Peer on connection %d announces itself as \"%s\" using protocol %d.%d (flags: \"%s\").",
 161                             Client_Conn(Client), impl,
 162                             protohigh, protolow, flags);
 163                 }
 164                 Client_SetFlags(Client, flags);
 165         }
 166
 167         return CONNECTED;
 168 } /* IRC_PASS */
 169
 170 /**
 171  * Handler for the IRC "NICK" command.
 172  *
 173  * @param Client The client from which this command has been received.
 174  * @param Req Request structure with prefix and all parameters.
 175  * @return CONNECTED or DISCONNECTED.
 176  */
 177 GLOBAL bool
 178 IRC_NICK( CLIENT *Client, REQUEST *Req )
 179 {
 180         CLIENT *intr_c, *target, *c;
 181         char *nick, *user, *hostname, *modes, *info;
 182         int token, hops;
 183
 184         assert( Client != NULL );
 185         assert( Req != NULL );
 186
 187         /* Some IRC clients, for example BitchX, send the NICK and USER
 188          * commands in the wrong order ... */
 189         if(Client_Type(Client) == CLIENT_UNKNOWN
 190             || Client_Type(Client) == CLIENT_GOTPASS
 191             || Client_Type(Client) == CLIENT_GOTNICK
 192 #ifndef STRICT_RFC
 193             || Client_Type(Client) == CLIENT_GOTUSER
 194 #endif
 195             || Client_Type(Client) == CLIENT_USER
 196             || Client_Type(Client) == CLIENT_SERVICE
 197             || (Client_Type(Client) == CLIENT_SERVER && Req->argc == 1))
 198         {
 199                 /* User registration or change of nickname */
 200                 _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 1)
 201
 202                 /* Search "target" client */
 203                 if (Client_Type(Client) == CLIENT_SERVER) {
 204                         target = Client_Search(Req->prefix);
 205                         if (!target)
 206                                 return IRC_WriteStrClient( Client,
 207                                                            ERR_NOSUCHNICK_MSG,
 208                                                            Client_ID( Client ),
 209                                                            Req->argv[0] );
 210                 } else {
 211                         /* Is this a restricted client? */
 212                         if (Client_HasMode(Client, 'r')) {
 213                                 IRC_SetPenalty(Client, 2);
 214                                 return IRC_WriteStrClient( Client,
 215                                                            ERR_RESTRICTED_MSG,
 216                                                            Client_ID( Client ));
 217                         }
 218                         target = Client;
 219                 }
 220
 221 #ifndef STRICT_RFC
 222                 /* If the clients tries to change to its own nickname we won't
 223                  * do anything. This is how the original ircd behaves and some
 224                  * clients (for example Snak) expect it to be like this.
 225                  * But I doubt that this is "really the right thing" ... */
 226                 if (strcmp(Client_ID(target), Req->argv[0]) == 0)
 227                         return CONNECTED;
 228 #endif
 229
 230                 /* Check that the new nickname is available. Special case:
 231                  * the client only changes from/to upper to lower case. */
 232                 if (strcasecmp(Client_ID(target), Req->argv[0]) != 0) {
 233                         if (!Client_CheckNick(target, Req->argv[0]))
 234                                 return CONNECTED;
 235                 }
 236
 237                 if (Client_Type(target) != CLIENT_USER &&
 238                     Client_Type(target) != CLIENT_SERVICE &&
 239                     Client_Type(target) != CLIENT_SERVER) {
 240                         /* New client */
 241                         LogDebug("Connection %d: got valid NICK command ...",
 242                              Client_Conn( Client ));
 243
 244                         /* Register new nickname of this client */
 245                         Client_SetID( target, Req->argv[0] );
 246
 247 #ifndef STRICT_RFC
 248                         if (Conf_AuthPing) {
 249                                 Conn_SetAuthPing(Client_Conn(Client), rand());
 250                                 IRC_WriteStrClient(Client, "PING :%ld",
 251                                         Conn_GetAuthPing(Client_Conn(Client)));
 252                                 LogDebug("Connection %d: sent AUTH PING %ld ...",
 253                                         Client_Conn(Client),
 254                                         Conn_GetAuthPing(Client_Conn(Client)));
 255                         }
 256 #endif
 257
 258                         /* If we received a valid USER command already then
 259                          * register the new client! */
 260                         if( Client_Type( Client ) == CLIENT_GOTUSER )
 261                                 return Login_User( Client );
 262                         else
 263                                 Client_SetType( Client, CLIENT_GOTNICK );
 264                 } else {
 265                         /* Nickname change */
 266                         Change_Nick(Client, target, Req->argv[0],
 267                                     Client_Type(Client) == CLIENT_USER ? true : false);
 268                         IRC_SetPenalty(target, 2);
 269                 }
 270
 271                 return CONNECTED;
 272         } else if(Client_Type(Client) == CLIENT_SERVER ||
 273                   Client_Type(Client) == CLIENT_SERVICE) {
 274                 /* Server or service introduces new client */
 275
 276                 /* Bad number of parameters? */
 277                 if (Req->argc != 2 && Req->argc != 7)
 278                         return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 279                                                   Client_ID(Client), Req->command);
 280
 281                 if (Req->argc >= 7) {
 282                         /* RFC 2813 compatible syntax */
 283                         nick = Req->argv[0];
 284                         hops = atoi(Req->argv[1]);
 285                         user = Req->argv[2];
 286                         hostname = Req->argv[3];
 287                         token = atoi(Req->argv[4]);
 288                         modes = Req->argv[5] + 1;
 289                         info = Req->argv[6];
 290                 } else {
 291                         /* RFC 1459 compatible syntax */
 292                         nick = Req->argv[0];
 293                         hops = 1;
 294                         user = Req->argv[0];
 295                         hostname = Client_ID(Client);
 296                         token = atoi(Req->argv[1]);
 297                         modes = "";
 298                         info = Req->argv[0];
 299                 }
 300
 301                 c = Client_Search(nick);
 302                 if(c) {
 303                         /*
 304                          * the new nick is already present on this server:
 305                          * the new and the old one have to be disconnected now.
 306                          */
 307                         Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
 308                         Kill_Nick( Req->argv[0], "Nick collision" );
 309                         return CONNECTED;
 310                 }
 311
 312                 /* Find the Server this client is connected to */
 313                 intr_c = Client_GetFromToken(Client, token);
 314                 if (!intr_c) {
 315                         Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
 316                         Kill_Nick( Req->argv[0], "Unknown server" );
 317                         return CONNECTED;
 318                 }
 319
 320                 c = Client_NewRemoteUser(intr_c, nick, hops, user, hostname,
 321                                          token, modes, info, true);
 322                 if (!c) {
 323                         /* Out of memory, we need to disconnect client to keep
 324                          * network state consistent! */
 325                         Log(LOG_ALERT,
 326                             "Can't create client structure! (on connection %d)",
 327                             Client_Conn(Client));
 328                         Kill_Nick(Req->argv[0], "Server error");
 329                         return CONNECTED;
 330                 }
 331
 332                 /* RFC 2813: client is now fully registered, inform all the
 333                  * other servers about the new user.
 334                  * RFC 1459: announce the new client only after receiving the
 335                  * USER command, first we need more information! */
 336                 if (Req->argc < 7) {
 337                         LogDebug("Client \"%s\" is being registered (RFC 1459) ...",
 338                                  Client_Mask(c));
 339                         Client_SetType(c, CLIENT_GOTNICK);
 340                 } else
 341                         Client_Introduce(Client, c, CLIENT_USER);
 342
 343                 return CONNECTED;
 344         }
 345         else
 346                 return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
 347                                           Client_ID(Client));
 348 } /* IRC_NICK */
 349
 350 /**
 351  * Handler for the IRC "SVSNICK" command.
 352  *
 353  * @param Client The client from which this command has been received.
 354  * @param Req Request structure with prefix and all parameters.
 355  * @return CONNECTED or DISCONNECTED.
 356  */
 357 GLOBAL bool
 358 IRC_SVSNICK(CLIENT *Client, REQUEST *Req)
 359 {
 360         CLIENT *from, *target;
 361
 362         assert(Client != NULL);
 363         assert(Req != NULL);
 364
 365         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 2)
 366
 367         /* Search the originator */
 368         from = Client_Search(Req->prefix);
 369         if (!from)
 370                 from = Client;
 371
 372         /* Search the target */
 373         target = Client_Search(Req->argv[0]);
 374         if (!target || Client_Type(target) != CLIENT_USER) {
 375                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 376                                           Client_ID(Client), Req->argv[0]);
 377         }
 378
 379         if (Client_Conn(target) <= NONE) {
 380                 /* We have to forward the message to the server handling
 381                  * this user; this is required to make sure all servers
 382                  * in the network do follow the nick name change! */
 383                 return IRC_WriteStrClientPrefix(Client_NextHop(target), from,
 384                                                 "SVSNICK %s %s",
 385                                                 Req->argv[0], Req->argv[1]);
 386         }
 387
 388         /* Make sure that the new nickname is valid */
 389         if (!Client_CheckNick(from, Req->argv[1]))
 390                 return CONNECTED;
 391
 392         Change_Nick(from, target, Req->argv[1], true);
 393         return CONNECTED;
 394 }
 395
 396 /**
 397  * Handler for the IRC "USER" command.
 398  *
 399  * @param Client The client from which this command has been received.
 400  * @param Req Request structure with prefix and all parameters.
 401  * @return CONNECTED or DISCONNECTED.
 402  */
 403 GLOBAL bool
 404 IRC_USER(CLIENT * Client, REQUEST * Req)
 405 {
 406         CLIENT *c;
 407         char *ptr;
 408
 409         assert(Client != NULL);
 410         assert(Req != NULL);
 411
 412         if (Client_Type(Client) == CLIENT_GOTNICK ||
 413 #ifndef STRICT_RFC
 414             Client_Type(Client) == CLIENT_UNKNOWN ||
 415 #endif
 416             Client_Type(Client) == CLIENT_GOTPASS)
 417         {
 418                 /* New connection */
 419                 _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 4)
 420
 421                 /* User name: only alphanumeric characters and limited
 422                    punctuation is allowed.*/
 423                 ptr = Req->argv[0];
 424                 while (*ptr) {
 425                         if (!isalnum((int)*ptr) &&
 426                             *ptr != '+' && *ptr != '-' && *ptr != '@' &&
 427                             *ptr != '.' && *ptr != '_') {
 428                                 Conn_Close(Client_Conn(Client), NULL,
 429                                            "Invalid user name", true);
 430                                 return DISCONNECTED;
 431                         }
 432                         ptr++;
 433                 }
 434
 435                 /* Save the received username for authentication, and use
 436                  * it up to the first '@' as default user name (like ircd2.11,
 437                  * bahamut, ircd-seven, ...), prefixed with '~', if needed: */
 438                 Client_SetOrigUser(Client, Req->argv[0]);
 439                 ptr = strchr(Req->argv[0], '@');
 440                 if (ptr)
 441                         *ptr = '\0';
 442 #ifdef IDENTAUTH
 443                 ptr = Client_User(Client);
 444                 if (!ptr || !*ptr || *ptr == '~')
 445                         Client_SetUser(Client, Req->argv[0], false);
 446 #else
 447                 Client_SetUser(Client, Req->argv[0], false);
 448 #endif
 449
 450                 /* "Real name" or user info text: Don't set it to the empty
 451                  * string, the original ircd can't deal with such "real names"
 452                  * (e. g. "USER user * * :") ... */
 453                 if (*Req->argv[3])
 454                         Client_SetInfo(Client, Req->argv[3]);
 455                 else
 456                         Client_SetInfo(Client, "-");
 457
 458                 LogDebug("Connection %d: got valid USER command ...",
 459                     Client_Conn(Client));
 460                 if (Client_Type(Client) == CLIENT_GOTNICK)
 461                         return Login_User(Client);
 462                 else
 463                         Client_SetType(Client, CLIENT_GOTUSER);
 464                 return CONNECTED;
 465
 466         } else if (Client_Type(Client) == CLIENT_SERVER ||
 467                    Client_Type(Client) == CLIENT_SERVICE) {
 468                 /* Server/service updating an user */
 469                 _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 4)
 470
 471                 c = Client_Search(Req->prefix);
 472                 if (!c)
 473                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 474                                                   Client_ID(Client),
 475                                                   Req->prefix);
 476
 477                 Client_SetUser(c, Req->argv[0], true);
 478                 Client_SetOrigUser(c, Req->argv[0]);
 479                 Client_SetHostname(c, Req->argv[1]);
 480                 Client_SetInfo(c, Req->argv[3]);
 481
 482                 LogDebug("Connection %d: got valid USER command for \"%s\".",
 483                          Client_Conn(Client), Client_Mask(c));
 484
 485                 /* RFC 1459 style user registration?
 486                  * Introduce client to network: */
 487                 if (Client_Type(c) == CLIENT_GOTNICK)
 488                         Client_Introduce(Client, c, CLIENT_USER);
 489
 490                 return CONNECTED;
 491         } else if (Client_Type(Client) == CLIENT_USER) {
 492                 /* Already registered connection */
 493                 IRC_SetPenalty(Client, 2);
 494                 return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
 495                                           Client_ID(Client));
 496         } else {
 497                 /* Unexpected/invalid connection state? */
 498                 IRC_SetPenalty(Client, 2);
 499                 return IRC_WriteStrClient(Client, ERR_NOTREGISTERED_MSG,
 500                                           Client_ID(Client));
 501         }
 502 } /* IRC_USER */
 503
 504 /**
 505  * Handler for the IRC "SERVICE" command.
 506  *
 507  * At the moment ngIRCd doesn't support directly linked services, so this
 508  * function returns ERR_ERRONEUSNICKNAME when the SERVICE command has not been
 509  * received from a peer server.
 510  *
 511  * @param Client The client from which this command has been received.
 512  * @param Req Request structure with prefix and all parameters.
 513  * @return CONNECTED or DISCONNECTED.
 514  */
 515 GLOBAL bool
 516 IRC_SERVICE(CLIENT *Client, REQUEST *Req)
 517 {
 518         CLIENT *c, *intr_c;
 519         char *nick, *user, *host, *info, *modes, *ptr;
 520         int token, hops;
 521
 522         assert(Client != NULL);
 523         assert(Req != NULL);
 524
 525         if (Client_Type(Client) != CLIENT_GOTPASS &&
 526             Client_Type(Client) != CLIENT_SERVER) {
 527                 IRC_SetPenalty(Client, 2);
 528                 return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
 529                                           Client_ID(Client));
 530         }
 531
 532         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 6)
 533
 534         if (Client_Type(Client) != CLIENT_SERVER)
 535                 return IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG,
 536                                   Client_ID(Client), Req->argv[0]);
 537
 538         nick = Req->argv[0];
 539         user = NULL; host = NULL;
 540         token = atoi(Req->argv[1]);
 541         hops = atoi(Req->argv[4]);
 542         info = Req->argv[5];
 543
 544         /* Validate service name ("nickname") */
 545         c = Client_Search(nick);
 546         if(c) {
 547                 /* Nickname collision: disconnect (KILL) both clients! */
 548                 Log(LOG_ERR, "Server %s introduces already registered service \"%s\"!",
 549                     Client_ID(Client), nick);
 550                 Kill_Nick(nick, "Nick collision");
 551                 return CONNECTED;
 552         }
 553
 554         /* Get the server to which the service is connected */
 555         intr_c = Client_GetFromToken(Client, token);
 556         if (! intr_c) {
 557                 Log(LOG_ERR, "Server %s introduces service \"%s\" on unknown server!?",
 558                     Client_ID(Client), nick);
 559                 Kill_Nick(nick, "Unknown server");
 560                 return CONNECTED;
 561         }
 562
 563         /* Get user and host name */
 564         ptr = strchr(nick, '@');
 565         if (ptr) {
 566                 *ptr = '\0';
 567                 host = ++ptr;
 568         }
 569         if (!host)
 570                 host = Client_Hostname(intr_c);
 571         ptr = strchr(nick, '!');
 572         if (ptr) {
 573                 *ptr = '\0';
 574                 user = ++ptr;
 575         }
 576         if (!user)
 577                 user = nick;
 578
 579         /* According to RFC 2812/2813 parameter 4 <type> "is currently reserved
 580          * for future usage"; but we use it to transfer the modes and check
 581          * that the first character is a '+' sign and ignore it otherwise. */
 582         modes = (Req->argv[3][0] == '+') ? ++Req->argv[3] : "";
 583
 584         c = Client_NewRemoteUser(intr_c, nick, hops, user, host,
 585                                  token, modes, info, true);
 586         if (! c) {
 587                 /* Couldn't create client structure, so KILL the service to
 588                  * keep network status consistent ... */
 589                 Log(LOG_ALERT, "Can't create client structure! (on connection %d)",
 590                     Client_Conn(Client));
 591                 Kill_Nick(nick, "Server error");
 592                 return CONNECTED;
 593         }
 594
 595         Client_Introduce(Client, c, CLIENT_SERVICE);
 596         return CONNECTED;
 597 } /* IRC_SERVICE */
 598
 599 /**
 600  * Handler for the IRC "WEBIRC" command.
 601  *
 602  * @param Client The client from which this command has been received.
 603  * @param Req Request structure with prefix and all parameters.
 604  * @return CONNECTED or DISCONNECTED.
 605  */
 606 GLOBAL bool
 607 IRC_WEBIRC(CLIENT *Client, REQUEST *Req)
 608 {
 609         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 4)
 610
 611         if (!Conf_WebircPwd[0] || strcmp(Req->argv[0], Conf_WebircPwd) != 0)
 612                 return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG,
 613                                           Client_ID(Client));
 614
 615         LogDebug("Connection %d: got valid WEBIRC command: user=%s, host=%s, ip=%s",
 616                  Client_Conn(Client), Req->argv[1], Req->argv[2], Req->argv[3]);
 617
 618         Client_SetUser(Client, Req->argv[1], true);
 619         Client_SetOrigUser(Client, Req->argv[1]);
 620         Client_SetHostname(Client, Req->argv[2]);
 621         return CONNECTED;
 622 } /* IRC_WEBIRC */
 623
 624 /**
 625  * Handler for the IRC "QUIT" command.
 626  *
 627  * @param Client The client from which this command has been received.
 628  * @param Req Request structure with prefix and all parameters.
 629  * @return CONNECTED or DISCONNECTED.
 630  */
 631 GLOBAL bool
 632 IRC_QUIT( CLIENT *Client, REQUEST *Req )
 633 {
 634         CLIENT *target;
 635         char quitmsg[LINE_LEN];
 636
 637         assert(Client != NULL);
 638         assert(Req != NULL);
 639
 640         _IRC_ARGC_LE_OR_RETURN_(Client, Req, 1)
 641
 642         if (Req->argc == 1)
 643                 strlcpy(quitmsg, Req->argv[0], sizeof quitmsg);
 644
 645         if (Client_Type(Client) == CLIENT_SERVER) {
 646                 /* Server */
 647                 target = Client_Search(Req->prefix);
 648                 if (!target) {
 649                         Log(LOG_WARNING,
 650                             "Got QUIT from %s for unknown client!?",
 651                             Client_ID(Client));
 652                         return CONNECTED;
 653                 }
 654
 655                 if (target != Client) {
 656                         Client_Destroy(target, "Got QUIT command",
 657                                        Req->argc == 1 ? quitmsg : NULL, true);
 658                         return CONNECTED;
 659                 } else {
 660                         Conn_Close(Client_Conn(Client), "Got QUIT command",
 661                                    Req->argc == 1 ? quitmsg : NULL, true);
 662                         return DISCONNECTED;
 663                 }
 664         } else {
 665                 if (Req->argc == 1 && quitmsg[0] != '\"') {
 666                         /* " " to avoid confusion */
 667                         strlcpy(quitmsg, "\"", sizeof quitmsg);
 668                         strlcat(quitmsg, Req->argv[0], sizeof quitmsg-1);
 669                         strlcat(quitmsg, "\"", sizeof quitmsg );
 670                 }
 671
 672                 /* User, Service, or not yet registered */
 673                 Conn_Close(Client_Conn(Client), "Got QUIT command",
 674                            Req->argc == 1 ? quitmsg : NULL, true);
 675
 676                 return DISCONNECTED;
 677         }
 678 } /* IRC_QUIT */
 679
 680 #ifndef STRICT_RFC
 681
 682 /**
 683  * Handler for HTTP command, e.g. GET and POST
 684  *
 685  * We handle these commands here to avoid the quite long timeout when
 686  * some user tries to access this IRC daemon using an web browser ...
 687  *
 688  * @param Client The client from which this command has been received.
 689  * @param Req Request structure with prefix and all parameters.
 690  * @return CONNECTED or DISCONNECTED.
 691  */
 692 GLOBAL bool
 693 IRC_QUIT_HTTP( CLIENT *Client, REQUEST *Req )
 694 {
 695         Req->argc = 1;
 696         Req->argv[0] = "Oops, HTTP request received? This is IRC!";
 697         return IRC_QUIT(Client, Req);
 698 } /* IRC_QUIT_HTTP */
 699
 700 #endif
 701
 702 /**
 703  * Handler for the IRC "PING" command.
 704  *
 705  * @param Client The client from which this command has been received.
 706  * @param Req Request structure with prefix and all parameters.
 707  * @return CONNECTED or DISCONNECTED.
 708  */
 709 GLOBAL bool
 710 IRC_PING(CLIENT *Client, REQUEST *Req)
 711 {
 712         CLIENT *target, *from;
 713
 714         assert(Client != NULL);
 715         assert(Req != NULL);
 716
 717         if (Req->argc < 1)
 718                 return IRC_WriteStrClient(Client, ERR_NOORIGIN_MSG,
 719                                           Client_ID(Client));
 720 #ifdef STRICT_RFC
 721         /* Don't ignore additional arguments when in "strict" mode */
 722         _IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
 723 #endif
 724
 725         if (Req->argc > 1) {
 726                 /* A target has been specified ... */
 727                 target = Client_Search(Req->argv[1]);
 728
 729                 if (!target || Client_Type(target) != CLIENT_SERVER)
 730                         return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 731                                         Client_ID(Client), Req->argv[1]);
 732
 733                 if (target != Client_ThisServer()) {
 734                         /* Ok, we have to forward the PING */
 735                         if (Client_Type(Client) == CLIENT_SERVER)
 736                                 from = Client_Search(Req->prefix);
 737                         else
 738                                 from = Client;
 739                         if (!from)
 740                                 return IRC_WriteStrClient(Client,
 741                                                 ERR_NOSUCHSERVER_MSG,
 742                                                 Client_ID(Client), Req->prefix);
 743
 744                         return IRC_WriteStrClientPrefix(target, from,
 745                                         "PING %s :%s", Req->argv[0],
 746                                         Req->argv[1] );
 747                 }
 748         }
 749
 750         if (Client_Type(Client) == CLIENT_SERVER) {
 751                 if (Req->prefix)
 752                         from = Client_Search(Req->prefix);
 753                 else
 754                         from = Client;
 755         } else
 756                 from = Client_ThisServer();
 757         if (!from)
 758                 return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 759                                         Client_ID(Client), Req->prefix);
 760
 761         Log(LOG_DEBUG, "Connection %d: got PING, sending PONG ...",
 762             Client_Conn(Client));
 763
 764 #ifdef STRICT_RFC
 765         return IRC_WriteStrClient(Client, "PONG %s :%s",
 766                 Client_ID(from), Client_ID(Client));
 767 #else
 768         /* Some clients depend on the argument being returned in the PONG
 769          * reply (not mentioned in any RFC, though) */
 770         return IRC_WriteStrClient(Client, "PONG %s :%s",
 771                 Client_ID(from), Req->argv[0]);
 772 #endif
 773 } /* IRC_PING */
 774
 775 /**
 776  * Handler for the IRC "PONG" command.
 777  *
 778  * @param Client The client from which this command has been received.
 779  * @param Req Request structure with prefix and all parameters.
 780  * @return CONNECTED or DISCONNECTED.
 781  */
 782 GLOBAL bool
 783 IRC_PONG(CLIENT *Client, REQUEST *Req)
 784 {
 785         CLIENT *target, *from;
 786         CONN_ID conn;
 787 #ifndef STRICT_RFC
 788         long auth_ping;
 789 #endif
 790         char *s;
 791
 792         assert(Client != NULL);
 793         assert(Req != NULL);
 794
 795         /* Wrong number of arguments? */
 796         if (Req->argc < 1) {
 797                 if (Client_Type(Client) == CLIENT_USER)
 798                         return IRC_WriteStrClient(Client, ERR_NOORIGIN_MSG,
 799                                                   Client_ID(Client));
 800                 else
 801                         return CONNECTED;
 802         }
 803         if (Client_Type(Client) == CLIENT_USER) {
 804                 _IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
 805         }
 806
 807         /* Forward? */
 808         if (Req->argc == 2 && Client_Type(Client) == CLIENT_SERVER) {
 809                 target = Client_Search(Req->argv[0]);
 810                 if (!target)
 811                         return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 812                                         Client_ID(Client), Req->argv[0]);
 813
 814                 from = Client_Search(Req->prefix);
 815
 816                 if (target != Client_ThisServer() && target != from) {
 817                         /* Ok, we have to forward the message. */
 818                         if (!from)
 819                                 return IRC_WriteStrClient(Client,
 820                                                 ERR_NOSUCHSERVER_MSG,
 821                                                 Client_ID(Client), Req->prefix);
 822
 823                         if (Client_Type(Client_NextHop(target)) != CLIENT_SERVER)
 824                                 s = Client_ID(from);
 825                         else
 826                                 s = Req->argv[0];
 827                         return IRC_WriteStrClientPrefix(target, from,
 828                                  "PONG %s :%s", s, Req->argv[1]);
 829                 }
 830         }
 831
 832         /* The connection timestamp has already been updated when the data has
 833          * been read from so socket, so we don't need to update it here. */
 834
 835         conn = Client_Conn(Client);
 836
 837 #ifndef STRICT_RFC
 838         /* Check authentication PING-PONG ... */
 839         auth_ping = Conn_GetAuthPing(conn);
 840         if (auth_ping) {
 841                 LogDebug("AUTH PONG: waiting for token \"%ld\", got \"%s\" ...",
 842                          auth_ping, Req->argv[0]);
 843                 if (auth_ping == atoi(Req->argv[0])) {
 844                         Conn_SetAuthPing(conn, 0);
 845                         if (Client_Type(Client) == CLIENT_WAITAUTHPING)
 846                                 Login_User(Client);
 847                 } else
 848                         if (!IRC_WriteStrClient(Client,
 849                                         "To connect, type /QUOTE PONG %ld",
 850                                         auth_ping))
 851                                 return DISCONNECTED;
 852         }
 853 #endif
 854
 855         if (Client_Type(Client) == CLIENT_SERVER && Conn_LastPing(conn) == 0) {
 856                 Log(LOG_INFO,
 857                     "Synchronization with \"%s\" done (connection %d): %ld second%s [%ld users, %ld channels].",
 858                     Client_ID(Client), conn, time(NULL) - Conn_GetSignon(conn),
 859                     time(NULL) - Conn_GetSignon(conn) == 1 ? "" : "s",
 860                     Client_UserCount(), Channel_CountVisible(NULL));
 861                 Conn_UpdatePing(conn);
 862         } else
 863                 LogDebug("Connection %d: received PONG. Lag: %ld seconds.",
 864                          conn, time(NULL) - Conn_LastPing(conn));
 865
 866         return CONNECTED;
 867 } /* IRC_PONG */
 868
 869 /**
 870  * Kill all users with a specific nickname in the network.
 871  *
 872  * @param Nick Nickname.
 873  * @param Reason Reason for the KILL.
 874  */
 875 static void
 876 Kill_Nick(char *Nick, char *Reason)
 877 {
 878         REQUEST r;
 879
 880         assert (Nick != NULL);
 881         assert (Reason != NULL);
 882
 883         r.prefix = NULL;
 884         r.argv[0] = Nick;
 885         r.argv[1] = Reason;
 886         r.argc = 2;
 887
 888         Log(LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s!",
 889             Nick, Reason);
 890
 891         IRC_KILL(Client_ThisServer(), &r);
 892 } /* Kill_Nick */
 893
 894 /**
 895  * Change the nickname of a client.
 896  *
 897  * @param Origin The client which caused the nickname change.
 898  * @param Target The client of which the nickname should be changed.
 899  * @param NewNick The new nickname.
 900  */
 901 static void
 902 Change_Nick(CLIENT *Origin, CLIENT *Target, char *NewNick, bool InformClient)
 903 {
 904         if (Client_Conn(Target) > NONE) {
 905                 /* Local client */
 906                 Log(LOG_INFO,
 907                     "%s \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".",
 908                     Client_TypeText(Target), Client_Mask(Target),
 909                     Client_Conn(Target), Client_ID(Target), NewNick);
 910                 Conn_UpdateIdle(Client_Conn(Target));
 911         } else {
 912                 /* Remote client */
 913                 LogDebug("%s \"%s\" changed nick: \"%s\" -> \"%s\".",
 914                          Client_TypeText(Target),
 915                          Client_Mask(Target), Client_ID(Target), NewNick);
 916         }
 917
 918         /* Inform all servers and users (which have to know) of the new name */
 919         if (InformClient) {
 920                 IRC_WriteStrClientPrefix(Target, Target, "NICK :%s", NewNick);
 921                 IRC_WriteStrServersPrefix(NULL, Target, "NICK :%s", NewNick);
 922         } else
 923                 IRC_WriteStrServersPrefix(Origin, Target, "NICK :%s", NewNick);
 924         IRC_WriteStrRelatedPrefix(Target, Target, false, "NICK :%s", NewNick);
 925
 926         /* Register old nickname for WHOWAS queries */
 927         Client_RegisterWhowas(Target);
 928
 929         /* Save new nickname */
 930         Client_SetID(Target, NewNick);
 931 }
 932
 933 /* -eof- */