src/ngircd/irc-login.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2008 Alexander Barton (alex@barton.de)
   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  * Login and logout
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 #include "imp.h"
  18 #include <assert.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <strings.h>
  23
  24 #include "ngircd.h"
  25 #include "resolve.h"
  26 #include "conn-func.h"
  27 #include "conf.h"
  28 #include "client.h"
  29 #include "channel.h"
  30 #include "log.h"
  31 #include "messages.h"
  32 #include "parse.h"
  33 #include "irc.h"
  34 #include "irc-info.h"
  35 #include "irc-write.h"
  36
  37 #include "exp.h"
  38 #include "irc-login.h"
  39
  40
  41 static bool Hello_User PARAMS(( CLIENT *Client ));
  42 static void Kill_Nick PARAMS(( char *Nick, char *Reason ));
  43
  44
  45 /**
  46  * Handler for the IRC command "PASS".
  47  * See RFC 2813 section 4.1.1, and RFC 2812 section 3.1.1.
  48  */
  49 GLOBAL bool
  50 IRC_PASS( CLIENT *Client, REQUEST *Req )
  51 {
  52         char *type, *orig_flags;
  53         int protohigh, protolow;
  54
  55         assert( Client != NULL );
  56         assert( Req != NULL );
  57
  58         /* Return an error if this is not a local client */
  59         if (Client_Conn(Client) <= NONE)
  60                 return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG,
  61                                           Client_ID(Client), Req->command);
  62
  63         if (Client_Type(Client) == CLIENT_UNKNOWN && Req->argc == 1) {
  64                 /* Not yet registered "unknown" connection, PASS with one
  65                  * argument: either a regular client, service, or server
  66                  * using the old RFC 1459 section 4.1.1 syntax. */
  67                 LogDebug("Connection %d: got PASS command ...",
  68                          Client_Conn(Client));
  69         } else if ((Client_Type(Client) == CLIENT_UNKNOWN ||
  70                     Client_Type(Client) == CLIENT_UNKNOWNSERVER) &&
  71                    (Req->argc == 3 || Req->argc == 4)) {
  72                 /* Not yet registered "unknown" connection or outgoing server
  73                  * link, PASS with three or four argument: server using the
  74                  * RFC 2813 section 4.1.1 syntax. */
  75                 LogDebug("Connection %d: got PASS command (new server link) ...",
  76                          Client_Conn(Client));
  77         } else if (Client_Type(Client) == CLIENT_UNKNOWN ||
  78                    Client_Type(Client) == CLIENT_UNKNOWNSERVER) {
  79                 /* Unregistered connection, but wrong number of arguments: */
  80                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
  81                                           Client_ID(Client), Req->command);
  82         } else {
  83                 /* Registered connection, PASS command is not allowed! */
  84                 return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
  85                                           Client_ID(Client));
  86         }
  87
  88         Client_SetPassword(Client, Req->argv[0]);
  89         Client_SetType(Client, CLIENT_GOTPASS);
  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         } else
 106                 protohigh = protolow = 0;
 107
 108         /* Protocol type, see doc/Protocol.txt */
 109         if (Req->argc >= 2 && strlen(Req->argv[1]) > 4)
 110                 type = &Req->argv[1][4];
 111         else
 112                 type = NULL;
 113
 114         /* Protocol flags/options */
 115         if (Req->argc >= 4)
 116                 orig_flags = Req->argv[3];
 117         else
 118                 orig_flags = "";
 119
 120         /* Implementation, version and IRC+ flags */
 121         if (Req->argc >= 3) {
 122                 char *impl, *ptr, *serverver, *flags;
 123
 124                 impl = Req->argv[2];
 125                 ptr = strchr(impl, '|');
 126                 if (ptr)
 127                         *ptr = '\0';
 128
 129                 if (type && strcmp(type, PROTOIRCPLUS) == 0) {
 130                         /* The peer seems to be a server which supports the
 131                          * IRC+ protocol (see doc/Protocol.txt). */
 132                         serverver = ptr + 1;
 133                         flags = strchr(serverver, ':');
 134                         if (flags) {
 135                                 *flags = '\0';
 136                                 flags++;
 137                         } else
 138                                 flags = "";
 139                         Log(LOG_INFO,
 140                             "Peer announces itself as %s-%s using protocol %d.%d/IRC+ (flags: \"%s\").",
 141                             impl, serverver, protohigh, protolow, flags);
 142                 } else {
 143                         /* The peer seems to be a server supporting the
 144                          * "original" IRC protocol (RFC 2813). */
 145                         serverver = "";
 146                         if (strchr(orig_flags, 'Z'))
 147                                 flags = "Z";
 148                         else
 149                                 flags = "";
 150                         Log(LOG_INFO,
 151                             "Peer announces itself as \"%s\" using protocol %d.%d (flags: \"%s\").",
 152                             impl, protohigh, protolow, flags);
 153                 }
 154                 Client_SetFlags(Client, flags);
 155         }
 156
 157         return CONNECTED;
 158 } /* IRC_PASS */
 159
 160
 161 /**
 162  * IRC "NICK" command.
 163  * This function implements the IRC command "NICK" which is used to register
 164  * with the server, to change already registered nicknames and to introduce
 165  * new users which are connected to other servers.
 166  */
 167 GLOBAL bool
 168 IRC_NICK( CLIENT *Client, REQUEST *Req )
 169 {
 170         CLIENT *intr_c, *target, *c;
 171         char *modes;
 172
 173         assert( Client != NULL );
 174         assert( Req != NULL );
 175
 176 #ifndef STRICT_RFC
 177         /* Some IRC clients, for example BitchX, send the NICK and USER
 178          * commands in the wrong order ... */
 179         if( Client_Type( Client ) == CLIENT_UNKNOWN
 180             || Client_Type( Client ) == CLIENT_GOTPASS
 181             || Client_Type( Client ) == CLIENT_GOTNICK
 182             || Client_Type( Client ) == CLIENT_GOTUSER
 183             || Client_Type( Client ) == CLIENT_USER
 184             || ( Client_Type( Client ) == CLIENT_SERVER && Req->argc == 1 ))
 185 #else
 186         if( Client_Type( Client ) == CLIENT_UNKNOWN
 187             || Client_Type( Client ) == CLIENT_GOTPASS
 188             || Client_Type( Client ) == CLIENT_GOTNICK
 189             || Client_Type( Client ) == CLIENT_USER
 190             || ( Client_Type( Client ) == CLIENT_SERVER && Req->argc == 1 ))
 191 #endif
 192         {
 193                 /* User registration or change of nickname */
 194
 195                 /* Wrong number of arguments? */
 196                 if( Req->argc != 1 )
 197                         return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 198                                                    Client_ID( Client ),
 199                                                    Req->command );
 200
 201                 /* Search "target" client */
 202                 if( Client_Type( Client ) == CLIENT_SERVER )
 203                 {
 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                 }
 211                 else
 212                 {
 213                         /* Is this a restricted client? */
 214                         if( Client_HasMode( Client, 'r' ))
 215                                 return IRC_WriteStrClient( Client,
 216                                                            ERR_RESTRICTED_MSG,
 217                                                            Client_ID( Client ));
 218
 219                         target = Client;
 220                 }
 221
 222 #ifndef STRICT_RFC
 223                 /* If the clients tries to change to its own nickname we won't
 224                  * do anything. This is how the original ircd behaves and some
 225                  * clients (for example Snak) expect it to be like this.
 226                  * But I doubt that this is "really the right thing" ... */
 227                 if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 )
 228                         return CONNECTED;
 229 #endif
 230
 231                 /* Check that the new nickname is available. Special case:
 232                  * the client only changes from/to upper to lower case. */
 233                 if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
 234                 {
 235                         if( ! Client_CheckNick( target, Req->argv[0] ))
 236                                 return CONNECTED;
 237                 }
 238
 239                 if(( Client_Type( target ) != CLIENT_USER )
 240                    && ( Client_Type( target ) != CLIENT_SERVER ))
 241                 {
 242                         /* New client */
 243                         Log( LOG_DEBUG, "Connection %d: got valid NICK command ...",
 244                              Client_Conn( Client ));
 245
 246                         /* Register new nickname of this client */
 247                         Client_SetID( target, Req->argv[0] );
 248
 249                         /* If we received a valid USER command already then
 250                          * register the new client! */
 251                         if( Client_Type( Client ) == CLIENT_GOTUSER )
 252                                 return Hello_User( Client );
 253                         else
 254                                 Client_SetType( Client, CLIENT_GOTNICK );
 255                 }
 256                 else
 257                 {
 258                         /* Nickname change */
 259                         if (Client_Conn(target) > NONE) {
 260                                 /* Local client */
 261                                 Log(LOG_INFO,
 262                                     "User \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".",
 263                                     Client_Mask(target), Client_Conn(target),
 264                                     Client_ID(target), Req->argv[0]);
 265                                 Conn_UpdateIdle(Client_Conn(target));
 266                         }
 267                         else
 268                         {
 269                                 /* Remote client */
 270                                 Log( LOG_DEBUG,
 271                                      "User \"%s\" changed nick: \"%s\" -> \"%s\".",
 272                                      Client_Mask( target ), Client_ID( target ),
 273                                      Req->argv[0] );
 274                         }
 275
 276                         /* Inform all users and servers (which have to know)
 277                          * of this nickname change */
 278                         if( Client_Type( Client ) == CLIENT_USER )
 279                                 IRC_WriteStrClientPrefix( Client, Client,
 280                                                           "NICK :%s",
 281                                                           Req->argv[0] );
 282                         IRC_WriteStrServersPrefix( Client, target,
 283                                                    "NICK :%s", Req->argv[0] );
 284                         IRC_WriteStrRelatedPrefix( target, target, false,
 285                                                    "NICK :%s", Req->argv[0] );
 286
 287                         /* Register old nickname for WHOWAS queries */
 288                         Client_RegisterWhowas( target );
 289
 290                         /* Save new nickname */
 291                         Client_SetID( target, Req->argv[0] );
 292
 293                         IRC_SetPenalty( target, 2 );
 294                 }
 295
 296                 return CONNECTED;
 297         }
 298         else if( Client_Type( Client ) == CLIENT_SERVER )
 299         {
 300                 /* Server introduces new client */
 301
 302                 /* Falsche Anzahl Parameter? */
 303                 if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 304
 305                 /* Nick ueberpruefen */
 306                 c = Client_Search( Req->argv[0] );
 307                 if( c )
 308                 {
 309                         /* Der neue Nick ist auf diesem Server bereits registriert:
 310                          * sowohl der neue, als auch der alte Client muessen nun
 311                          * disconnectiert werden. */
 312                         Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
 313                         Kill_Nick( Req->argv[0], "Nick collision" );
 314                         return CONNECTED;
 315                 }
 316
 317                 /* Server, zu dem der Client connectiert ist, suchen */
 318                 intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] ));
 319                 if( ! intr_c )
 320                 {
 321                         Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
 322                         Kill_Nick( Req->argv[0], "Unknown server" );
 323                         return CONNECTED;
 324                 }
 325
 326                 /* Neue Client-Struktur anlegen */
 327                 c = Client_NewRemoteUser( intr_c, Req->argv[0], atoi( Req->argv[1] ), Req->argv[2], Req->argv[3], atoi( Req->argv[4] ), Req->argv[5] + 1, Req->argv[6], true);
 328                 if( ! c )
 329                 {
 330                         /* Eine neue Client-Struktur konnte nicht angelegt werden.
 331                          * Der Client muss disconnectiert werden, damit der Netz-
 332                          * status konsistent bleibt. */
 333                         Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
 334                         Kill_Nick( Req->argv[0], "Server error" );
 335                         return CONNECTED;
 336                 }
 337
 338                 modes = Client_Modes( c );
 339                 if( *modes ) Log( LOG_DEBUG, "User \"%s\" (+%s) registered (via %s, on %s, %d hop%s).", Client_Mask( c ), modes, Client_ID( Client ), Client_ID( intr_c ), Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
 340                 else Log( LOG_DEBUG, "User \"%s\" registered (via %s, on %s, %d hop%s).", Client_Mask( c ), Client_ID( Client ), Client_ID( intr_c ), Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
 341
 342                 /* Andere Server, ausser dem Introducer, informieren */
 343                 IRC_WriteStrServersPrefix( Client, Client, "NICK %s %d %s %s %d %s :%s", Req->argv[0], atoi( Req->argv[1] ) + 1, Req->argv[2], Req->argv[3], Client_MyToken( intr_c ), Req->argv[5], Req->argv[6] );
 344
 345                 return CONNECTED;
 346         }
 347         else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
 348 } /* IRC_NICK */
 349
 350
 351 GLOBAL bool
 352 IRC_USER( CLIENT *Client, REQUEST *Req )
 353 {
 354 #ifdef IDENTAUTH
 355         char *ptr;
 356 #endif
 357
 358         assert( Client != NULL );
 359         assert( Req != NULL );
 360
 361 #ifndef STRICT_RFC
 362         if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
 363 #else
 364         if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
 365 #endif
 366         {
 367                 /* Wrong number of parameters? */
 368                 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 369
 370                 /* User name */
 371 #ifdef IDENTAUTH
 372                 ptr = Client_User( Client );
 373                 if( ! ptr || ! *ptr || *ptr == '~' ) Client_SetUser( Client, Req->argv[0], false );
 374 #else
 375                 Client_SetUser( Client, Req->argv[0], false );
 376 #endif
 377
 378                 /* "Real name" or user info text: Don't set it to the empty string, the original ircd
 379                  * can't deal with such "real names" (e. g. "USER user * * :") ... */
 380                 if( *Req->argv[3] ) Client_SetInfo( Client, Req->argv[3] );
 381                 else Client_SetInfo( Client, "-" );
 382
 383                 Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
 384                 if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
 385                 else Client_SetType( Client, CLIENT_GOTUSER );
 386                 return CONNECTED;
 387         }
 388         else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
 389         {
 390                 return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
 391         }
 392         else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
 393 } /* IRC_USER */
 394
 395
 396 /**
 397  * Service registration.
 398  * ngIRCd does not support services at the moment, so this function is a
 399  * dummy that returns ERR_ERRONEUSNICKNAME on each call.
 400  */
 401 GLOBAL bool
 402 IRC_SERVICE(CLIENT *Client, REQUEST *Req)
 403 {
 404         assert(Client != NULL);
 405         assert(Req != NULL);
 406
 407         if (Client_Type(Client) != CLIENT_GOTPASS)
 408                 return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
 409                                           Client_ID(Client));
 410
 411         if (Req->argc != 6)
 412                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 413                                           Client_ID(Client), Req->command);
 414
 415         return IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG,
 416                                   Client_ID(Client), Req->argv[0]);
 417 } /* IRC_SERVICE */
 418
 419
 420 GLOBAL bool
 421 IRC_QUIT( CLIENT *Client, REQUEST *Req )
 422 {
 423         CLIENT *target;
 424         char quitmsg[LINE_LEN];
 425
 426         assert( Client != NULL );
 427         assert( Req != NULL );
 428
 429         /* Wrong number of arguments? */
 430         if( Req->argc > 1 )
 431                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 432
 433         if (Req->argc == 1)
 434                 strlcpy(quitmsg, Req->argv[0], sizeof quitmsg);
 435
 436         if ( Client_Type( Client ) == CLIENT_SERVER )
 437         {
 438                 /* Server */
 439                 target = Client_Search( Req->prefix );
 440                 if( ! target )
 441                 {
 442                         /* Den Client kennen wir nicht (mehr), also nichts zu tun. */
 443                         Log( LOG_WARNING, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
 444                         return CONNECTED;
 445                 }
 446
 447                 Client_Destroy( target, "Got QUIT command.", Req->argc == 1 ? quitmsg : NULL, true);
 448
 449                 return CONNECTED;
 450         }
 451         else
 452         {
 453                 if (Req->argc == 1 && quitmsg[0] != '\"') {
 454                         /* " " to avoid confusion */
 455                         strlcpy(quitmsg, "\"", sizeof quitmsg);
 456                         strlcat(quitmsg, Req->argv[0], sizeof quitmsg-1);
 457                         strlcat(quitmsg, "\"", sizeof quitmsg );
 458                 }
 459
 460                 /* User, Service, oder noch nicht registriert */
 461                 Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argc == 1 ? quitmsg : NULL, true);
 462
 463                 return DISCONNECTED;
 464         }
 465 } /* IRC_QUIT */
 466
 467
 468 GLOBAL bool
 469 IRC_PING(CLIENT *Client, REQUEST *Req)
 470 {
 471         CLIENT *target, *from;
 472
 473         assert(Client != NULL);
 474         assert(Req != NULL);
 475
 476         /* Wrong number of arguments? */
 477         if (Req->argc < 1)
 478                 return IRC_WriteStrClient(Client, ERR_NOORIGIN_MSG,
 479                                           Client_ID(Client));
 480 #ifdef STRICT_RFC
 481         /* Don't ignore additional arguments when in "strict" mode */
 482         if (Req->argc > 2)
 483                  return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 484                                            Client_ID(Client), Req->command);
 485 #endif
 486
 487         if (Req->argc > 1) {
 488                 /* A target has been specified ... */
 489                 target = Client_Search(Req->argv[1]);
 490
 491                 if (!target || Client_Type(target) != CLIENT_SERVER)
 492                         return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 493                                         Client_ID(Client), Req->argv[1]);
 494
 495                 if (target != Client_ThisServer()) {
 496                         /* Ok, we have to forward the PING */
 497                         if (Client_Type(Client) == CLIENT_SERVER)
 498                                 from = Client_Search(Req->prefix);
 499                         else
 500                                 from = Client;
 501                         if (!from)
 502                                 return IRC_WriteStrClient(Client,
 503                                                 ERR_NOSUCHSERVER_MSG,
 504                                                 Client_ID(Client), Req->prefix);
 505
 506                         return IRC_WriteStrClientPrefix(target, from,
 507                                         "PING %s :%s", Req->argv[0],
 508                                         Req->argv[1] );
 509                 }
 510         }
 511
 512         if (Client_Type(Client) == CLIENT_SERVER) {
 513                 if (Req->prefix)
 514                         from = Client_Search(Req->prefix);
 515                 else
 516                         from = Client;
 517         } else
 518                 from = Client_ThisServer();
 519         if (!from)
 520                 return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 521                                         Client_ID(Client), Req->prefix);
 522
 523         Log(LOG_DEBUG, "Connection %d: got PING, sending PONG ...",
 524             Client_Conn(Client));
 525
 526 #ifdef STRICT_RFC
 527         return IRC_WriteStrClient(Client, "PONG %s :%s",
 528                 Client_ID(from), Client_ID(Client));
 529 #else
 530         /* Some clients depend on the argument being returned in the PONG
 531          * reply (not mentioned in any RFC, though) */
 532         return IRC_WriteStrClient(Client, "PONG %s :%s",
 533                 Client_ID(from), Req->argv[0]);
 534 #endif
 535 } /* IRC_PING */
 536
 537
 538 GLOBAL bool
 539 IRC_PONG(CLIENT *Client, REQUEST *Req)
 540 {
 541         CLIENT *target, *from;
 542         char *s;
 543
 544         assert(Client != NULL);
 545         assert(Req != NULL);
 546
 547         /* Wrong number of arguments? */
 548         if (Req->argc < 1)
 549                 return IRC_WriteStrClient(Client, ERR_NOORIGIN_MSG,
 550                                           Client_ID(Client));
 551         if (Req->argc > 2)
 552                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 553                                           Client_ID(Client), Req->command);
 554
 555         /* Forward? */
 556         if (Req->argc == 2 && Client_Type(Client) == CLIENT_SERVER) {
 557                 target = Client_Search(Req->argv[0]);
 558                 if (!target)
 559                         return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 560                                         Client_ID(Client), Req->argv[0]);
 561
 562                 from = Client_Search(Req->prefix);
 563
 564                 if (target != Client_ThisServer() && target != from) {
 565                         /* Ok, we have to forward the message. */
 566                         if (!from)
 567                                 return IRC_WriteStrClient(Client,
 568                                                 ERR_NOSUCHSERVER_MSG,
 569                                                 Client_ID(Client), Req->prefix);
 570
 571                         if (Client_Type(Client_NextHop(target)) != CLIENT_SERVER)
 572                                 s = Client_ID(from);
 573                         else
 574                                 s = Req->argv[0];
 575                         return IRC_WriteStrClientPrefix(target, from,
 576                                  "PONG %s :%s", s, Req->argv[1]);
 577                 }
 578         }
 579
 580         /* The connection timestamp has already been updated when the data has
 581          * been read from so socket, so we don't need to update it here. */
 582
 583         if (Client_Conn(Client) > NONE)
 584                 Log(LOG_DEBUG,
 585                         "Connection %d: received PONG. Lag: %ld seconds.",
 586                         Client_Conn(Client),
 587                         time(NULL) - Conn_LastPing(Client_Conn(Client)));
 588         else
 589                  Log(LOG_DEBUG,
 590                         "Connection %d: received PONG.", Client_Conn(Client));
 591
 592         return CONNECTED;
 593 } /* IRC_PONG */
 594
 595
 596 static bool
 597 Hello_User(CLIENT * Client)
 598 {
 599         assert(Client != NULL);
 600
 601         /* Check password ... */
 602         if (strcmp(Client_Password(Client), Conf_ServerPwd) != 0) {
 603                 /* Bad password! */
 604                 Log(LOG_ERR,
 605                     "User \"%s\" rejected (connection %d): Bad password!",
 606                     Client_Mask(Client), Client_Conn(Client));
 607                 Conn_Close(Client_Conn(Client), NULL, "Bad password", true);
 608                 return DISCONNECTED;
 609         }
 610
 611         Log(LOG_NOTICE, "User \"%s\" registered (connection %d).",
 612             Client_Mask(Client), Client_Conn(Client));
 613
 614         /* Inform other servers */
 615         IRC_WriteStrServers(NULL, "NICK %s 1 %s %s 1 +%s :%s",
 616                             Client_ID(Client), Client_User(Client),
 617                             Client_Hostname(Client), Client_Modes(Client),
 618                             Client_Info(Client));
 619
 620         if (!IRC_WriteStrClient
 621             (Client, RPL_WELCOME_MSG, Client_ID(Client), Client_Mask(Client)))
 622                 return false;
 623         if (!IRC_WriteStrClient
 624             (Client, RPL_YOURHOST_MSG, Client_ID(Client),
 625              Client_ID(Client_ThisServer()), PACKAGE_VERSION, TARGET_CPU,
 626              TARGET_VENDOR, TARGET_OS))
 627                 return false;
 628         if (!IRC_WriteStrClient
 629             (Client, RPL_CREATED_MSG, Client_ID(Client), NGIRCd_StartStr))
 630                 return false;
 631         if (!IRC_WriteStrClient
 632             (Client, RPL_MYINFO_MSG, Client_ID(Client),
 633              Client_ID(Client_ThisServer()), PACKAGE_VERSION, USERMODES,
 634              CHANMODES))
 635                 return false;
 636
 637         /* Features supported by this server (005 numeric, ISUPPORT),
 638          * see <http://www.irc.org/tech_docs/005.html> for details. */
 639         if (!IRC_Send_ISUPPORT(Client))
 640                 return DISCONNECTED;
 641
 642         Client_SetType(Client, CLIENT_USER);
 643
 644         if (!IRC_Send_LUSERS(Client))
 645                 return DISCONNECTED;
 646         if (!IRC_Show_MOTD(Client))
 647                 return DISCONNECTED;
 648
 649         /* Suspend the client for a second ... */
 650         IRC_SetPenalty(Client, 1);
 651
 652         return CONNECTED;
 653 } /* Hello_User */
 654
 655
 656 static void
 657 Kill_Nick( char *Nick, char *Reason )
 658 {
 659         REQUEST r;
 660
 661         assert( Nick != NULL );
 662         assert( Reason != NULL );
 663
 664         r.prefix = (char *)Client_ThisServer( );
 665         r.argv[0] = Nick;
 666         r.argv[1] = Reason;
 667         r.argc = 2;
 668
 669         Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
 670         IRC_KILL( Client_ThisServer( ), &r );
 671 } /* Kill_Nick */
 672
 673
 674 /* -eof- */