/**
* Introduce a new user or service client in the network.
*
* @param From Remote server introducing the client or NULL (local).
* @param Client New client.
* @param Type Type of the client (CLIENT_USER or CLIENT_SERVICE).
*/
GLOBAL void
Client_Introduce(CLIENT *From, CLIENT *Client, int Type)
{
/* Set client type (user or service) */
Client_SetType(Client, Type);
if (From) {
if (Conf_NickIsService(Conf_GetServer(Client_Conn(From)),
Client_ID(Client)))
Client_SetType(Client, CLIENT_SERVICE);
LogDebug("%s \"%s\" (+%s) registered (via %s, on %s, %d hop%s).",
Client_TypeText(Client), Client_Mask(Client),
Client_Modes(Client), Client_ID(From),
Client_ID(Client_Introducer(Client)),
Client_Hops(Client), Client_Hops(Client) > 1 ? "s": "");
} else {
Log(LOG_NOTICE, "%s \"%s\" registered (connection %d).",
Client_TypeText(Client), Client_Mask(Client),
Client_Conn(Client));
Log_ServerNotice('c', "Client connecting: %s (%s@%s) [%s] - %s",
Client_ID(Client), Client_User(Client),
Client_Hostname(Client),
Conn_IPA(Client_Conn(Client)),
Client_TypeText(Client));
}
/* Inform other servers */
IRC_WriteStrServersPrefixFlag_CB(From,
From != NULL ? From : Client_ThisServer(),
'\0', cb_introduceClient, (void *)Client);
} /* Client_Introduce */
/**
* Initiate client login.
*
* This function is called after the daemon received the required NICK and
* USER commands of a new client. If the daemon is compiled with support for
* PAM, the authentication sub-processs is forked; otherwise the global server
* password is checked.
*
* @param Client The client logging in.
* @returns CONNECTED or DISCONNECTED.
*/
GLOBAL bool
Login_User(CLIENT * Client)
{
#ifdef PAM
int pipefd[2], result;
pid_t pid;
#endif
CONN_ID conn;
assert(Client != NULL);
conn = Client_Conn(Client);
#ifndef STRICT_RFC
if (Conf_AuthPing) {
/* Did we receive the "auth PONG" already? */
if (Conn_GetAuthPing(conn)) {
Client_SetType(Client, CLIENT_WAITAUTHPING);
LogDebug("Connection %d: Waiting for AUTH PONG ...", conn);
return CONNECTED;
}
}
#endif
/* Still waiting for "CAP END" command? */
if (Client_Cap(Client) & CLIENT_CAP_PENDING) {
Client_SetType(Client, CLIENT_WAITCAPEND);
LogDebug("Connection %d: Waiting for CAP END ...", conn);
return CONNECTED;
}
#ifdef PAM
if (!Conf_PAM) {
/* Don't do any PAM authentication at all if PAM is not
* enabled, instead emulate the behavior of the daemon
* compiled without PAM support. */
if (strcmp(Conn_Password(conn), Conf_ServerPwd) == 0)
return Login_User_PostAuth(Client);
Client_Reject(Client, "Bad server password", false);
return DISCONNECTED;
}
if (Conf_PAMIsOptional &&
strcmp(Conn_Password(conn), "") == 0) {
/* Clients are not required to send a password and to be PAM-
* authenticated at all. If not, they won't become "identified"
* and keep the "~" in their supplied user name.
* Therefore it is sensible to either set Conf_PAMisOptional or
* to enable IDENT lookups -- not both. */
return Login_User_PostAuth(Client);
}
if (Conf_PAM) {
/* Fork child process for PAM authentication; and make sure that the
* process timeout is set higher than the login timeout! */
pid = Proc_Fork(Conn_GetProcStat(conn), pipefd,
cb_Read_Auth_Result, Conf_PongTimeout + 1);
if (pid > 0) {
LogDebug("Authenticator for connection %d created (PID %d).",
conn, pid);
return CONNECTED;
} else {
/* Sub process */
Log_Init_Subprocess("Auth");
Conn_CloseAllSockets(NONE);
result = PAM_Authenticate(Client);
if (write(pipefd[1], &result, sizeof(result)) != sizeof(result))
Log_Subprocess(LOG_ERR,
"Failed to pipe result to parent!");
Log_Exit_Subprocess("Auth");
exit(0);
}
} else return CONNECTED;
#else
/* Check global server password ... */
if (strcmp(Conn_Password(conn), Conf_ServerPwd) != 0) {
/* Bad password! */
Client_Reject(Client, "Bad server password", false);
return DISCONNECTED;
}
return Login_User_PostAuth(Client);
#endif
}
/**
* Handle ENDOFMOTD (376) numeric and login remote server.
* The peer is either an IRC server (no IRC+ protocol), or we got the
* ENDOFMOTD numeric from an IRC+ server. We have to register the new server.
*/
GLOBAL bool
IRC_Num_ENDOFMOTD(CLIENT * Client, UNUSED REQUEST * Req)
{
int max_hops, i;
CLIENT *c;
CHANNEL *chan;
Client_SetType(Client, CLIENT_SERVER);
Log(LOG_NOTICE | LOG_snotice,
"Server \"%s\" registered (connection %d, 1 hop - direct link).",
Client_ID(Client), Client_Conn(Client));
/* Get highest hop count */
max_hops = 0;
c = Client_First();
while (c) {
if (Client_Hops(c) > max_hops)
max_hops = Client_Hops(c);
c = Client_Next(c);
}
/* Inform the new server about all other servers, and announce the
* new server to all the already registered ones. Important: we have
* to do this "in order" and can't introduce servers of which the
* "toplevel server" isn't known already. */
for (i = 0; i < (max_hops + 1); i++) {
for (c = Client_First(); c != NULL; c = Client_Next(c)) {
if (Client_Type(c) != CLIENT_SERVER)
continue; /* not a server */
if (Client_Hops(c) != i)
continue; /* not actual "nesting level" */
if (c == Client || c == Client_ThisServer())
continue; /* that's us or the peer! */
if (!Announce_Server(Client, c))
return DISCONNECTED;
}
}
/* Announce all the users to the new server */
c = Client_First();
while (c) {
if (Client_Type(c) == CLIENT_USER ||
Client_Type(c) == CLIENT_SERVICE) {
if (!Client_Announce(Client, Client_ThisServer(), c))
return DISCONNECTED;
}
c = Client_Next(c);
}
/* Announce all channels to the new server */
chan = Channel_First();
while (chan) {
if (Channel_IsLocal(chan)) {
chan = Channel_Next(chan);
continue;
}
#ifdef IRCPLUS
/* Send CHANINFO if the peer supports it */
if (Client_HasFlag(Client, 'C')) {
if (!Send_CHANINFO(Client, chan))
return DISCONNECTED;
}
#endif
if (!Announce_Channel(Client, chan))
return DISCONNECTED;
/* Get next channel ... */
chan = Channel_Next(chan);
}
#ifdef IRCPLUS
if (Client_HasFlag(Client, 'L')) {
LogDebug("Synchronizing INVITE- and BAN-lists ...");
if (!Synchronize_Lists(Client))
return DISCONNECTED;
}
#endif
if (!IRC_WriteStrClient(Client, "PING :%s",
Client_ID(Client_ThisServer())))
return DISCONNECTED;
return CONNECTED;
} /* IRC_Num_ENDOFMOTD */
/**
* Handler for the IRC command "SERVER".
* See RFC 2813 section 4.1.2.
*/
GLOBAL bool
IRC_SERVER( CLIENT *Client, REQUEST *Req )
{
char str[LINE_LEN];
CLIENT *from, *c;
int i;
CONN_ID con;
assert( Client != NULL );
assert( Req != NULL );
/* Return an error if this is not a local client */
if (Client_Conn(Client) <= NONE)
return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG,
Client_ID(Client), Req->command);
if (Client_Type(Client) == CLIENT_GOTPASS ||
Client_Type(Client) == CLIENT_GOTPASS_2813) {
/* We got a PASS command from the peer, and now a SERVER
* command: the peer tries to register itself as a server. */
LogDebug("Connection %d: got SERVER command (new server link) ...",
Client_Conn(Client));
if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
/* Ist this server configured on out side? */
for( i = 0; i < MAX_SERVERS; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
if( i >= MAX_SERVERS )
{
Log( LOG_ERR, "Connection %d: Server \"%s\" not configured here!", Client_Conn( Client ), Req->argv[0] );
Conn_Close( Client_Conn( Client ), NULL, "Server not configured here", true);
return DISCONNECTED;
}
if( strcmp( Client_Password( Client ), Conf_Server[i].pwd_in ) != 0 )
{
/* wrong password */
Log( LOG_ERR, "Connection %d: Got bad password from server \"%s\"!", Client_Conn( Client ), Req->argv[0] );
Conn_Close( Client_Conn( Client ), NULL, "Bad password", true);
return DISCONNECTED;
}
/* Is there a registered server with this ID? */
if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
Client_SetID( Client, Req->argv[0] );
Client_SetHops( Client, 1 );
Client_SetInfo( Client, Req->argv[Req->argc - 1] );
/* Is this server registering on our side, or are we connecting to
* a remote server? */
con = Client_Conn(Client);
if (Client_Token(Client) != TOKEN_OUTBOUND) {
/* Incoming connection, send user/pass */
if (!IRC_WriteStrClient(Client, "PASS %s %s",
Conf_Server[i].pwd_out,
NGIRCd_ProtoID)
|| !IRC_WriteStrClient(Client, "SERVER %s 1 :%s",
Conf_ServerName,
Conf_ServerInfo)) {
Conn_Close(con, "Unexpected server behavior!",
NULL, false);
return DISCONNECTED;
}
Client_SetIntroducer(Client, Client);
Client_SetToken(Client, 1);
} else {
/* outgoing connect, we already sent a SERVER and PASS
* command to the peer */
Client_SetToken(Client, atoi(Req->argv[1]));
}
/* Mark this connection as belonging to an configured server */
Conf_SetServer(i, con);
/* Check protocol level */
if (Client_Type(Client) == CLIENT_GOTPASS) {
/* We got a "simple" PASS command, so the peer is
* using the protocol as defined in RFC 1459. */
if (! (Conn_Options(con) & CONN_RFC1459))
Log(LOG_INFO,
"Switching connection %d (\"%s\") to RFC 1459 compatibility mode.",
con, Client_ID(Client));
Conn_SetOption(con, CONN_RFC1459);
}
Client_SetType(Client, CLIENT_UNKNOWNSERVER);
#ifdef ZLIB
if (strchr(Client_Flags(Client), 'Z') && !Zip_InitConn(con)) {
Conn_Close( con, "Can't inizialize compression (zlib)!", NULL, false );
return DISCONNECTED;
}
#endif
#ifdef IRCPLUS
if (strchr(Client_Flags(Client), 'H')) {
LogDebug("Peer supports IRC+ extended server handshake ...");
if (!IRC_Send_ISUPPORT(Client))
return DISCONNECTED;
return IRC_WriteStrClient(Client, RPL_ENDOFMOTD_MSG,
Client_ID(Client));
} else {
#endif
if (Conf_MaxNickLength != CLIENT_NICK_LEN_DEFAULT)
Log(LOG_CRIT,
"Attention: this server uses a non-standard nick length, but the peer doesn't support the IRC+ extended server handshake!");
#ifdef IRCPLUS
}
#endif
return IRC_Num_ENDOFMOTD(Client, Req);
}
else if( Client_Type( Client ) == CLIENT_SERVER )
{
/* New server is being introduced to the network */
if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
/* check for existing server with same ID */
if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
from = Client_Search( Req->prefix );
if( ! from )
{
/* Uh, Server, that introduced the new server is unknown?! */
Log( LOG_ALERT, "Unknown ID in prefix of SERVER: \"%s\"! (on connection %d)", Req->prefix, Client_Conn( Client ));
Conn_Close( Client_Conn( Client ), NULL, "Unknown ID in prefix of SERVER", true);
return DISCONNECTED;
}
c = Client_NewRemoteServer(Client, Req->argv[0], from, atoi(Req->argv[1]), atoi(Req->argv[2]), Req->argv[3], true);
if (!c) {
Log( LOG_ALERT, "Can't create client structure for server! (on connection %d)", Client_Conn( Client ));
Conn_Close( Client_Conn( Client ), NULL, "Can't allocate client structure for remote server", true);
return DISCONNECTED;
}
if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) snprintf( str, sizeof( str ), "connected to %s, ", Client_ID( from ));
else strcpy( str, "" );
Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" registered (via %s, %s%d hop%s).", Client_ID( c ), Client_ID( Client ), str, Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
/* notify other servers */
IRC_WriteStrServersPrefix( Client, from, "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ));
return CONNECTED;
} else
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
} /* IRC_SERVER */
/**
* Handler for the IRC "PASS" command.
*
* See RFC 2813 section 4.1.1, and RFC 2812 section 3.1.1.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @returns CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_PASS( CLIENT *Client, REQUEST *Req )
{
char *type, *orig_flags;
int protohigh, protolow;
assert( Client != NULL );
assert( Req != NULL );
/* Return an error if this is not a local client */
if (Client_Conn(Client) <= NONE)
return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG,
Client_ID(Client), Req->command);
if (Client_Type(Client) == CLIENT_UNKNOWN && Req->argc == 1) {
/* Not yet registered "unknown" connection, PASS with one
* argument: either a regular client, service, or server
* using the old RFC 1459 section 4.1.1 syntax. */
LogDebug("Connection %d: got PASS command (RFC 1459) ...",
Client_Conn(Client));
} else if ((Client_Type(Client) == CLIENT_UNKNOWN ||
Client_Type(Client) == CLIENT_UNKNOWNSERVER) &&
(Req->argc == 3 || Req->argc == 4)) {
/* Not yet registered "unknown" connection or outgoing server
* link, PASS with three or four argument: server using the
* RFC 2813 section 4.1.1 syntax. */
LogDebug("Connection %d: got PASS command (RFC 2813, new server link) ...",
Client_Conn(Client));
} else if (Client_Type(Client) == CLIENT_UNKNOWN ||
Client_Type(Client) == CLIENT_UNKNOWNSERVER) {
/* Unregistered connection, but wrong number of arguments: */
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
} else {
/* Registered connection, PASS command is not allowed! */
return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
Client_ID(Client));
}
Conn_SetPassword(Client_Conn(Client), Req->argv[0]);
/* Protocol version */
if (Req->argc >= 2 && strlen(Req->argv[1]) >= 4) {
int c2, c4;
c2 = Req->argv[1][2];
c4 = Req->argv[1][4];
Req->argv[1][4] = '\0';
protolow = atoi(&Req->argv[1][2]);
Req->argv[1][2] = '\0';
protohigh = atoi(Req->argv[1]);
Req->argv[1][2] = c2;
Req->argv[1][4] = c4;
Client_SetType(Client, CLIENT_GOTPASS_2813);
} else {
protohigh = protolow = 0;
Client_SetType(Client, CLIENT_GOTPASS);
}
/* Protocol type, see doc/Protocol.txt */
if (Req->argc >= 2 && strlen(Req->argv[1]) > 4)
type = &Req->argv[1][4];
else
type = NULL;
/* Protocol flags/options */
if (Req->argc >= 4)
orig_flags = Req->argv[3];
else
orig_flags = "";
/* Implementation, version and IRC+ flags */
if (Req->argc >= 3) {
char *impl, *ptr, *serverver, *flags;
impl = Req->argv[2];
ptr = strchr(impl, '|');
if (ptr)
*ptr = '\0';
if (type && strcmp(type, PROTOIRCPLUS) == 0) {
/* The peer seems to be a server which supports the
* IRC+ protocol (see doc/Protocol.txt). */
serverver = ptr ? ptr + 1 : "?";
flags = strchr(ptr ? serverver : impl, ':');
if (flags) {
*flags = '\0';
flags++;
} else
flags = "";
Log(LOG_INFO,
"Peer on conenction %d announces itself as %s-%s using protocol %d.%d/IRC+ (flags: \"%s\").",
Client_Conn(Client), impl, serverver,
protohigh, protolow, flags);
} else {
/* The peer seems to be a server supporting the
* "original" IRC protocol (RFC 2813). */
if (strchr(orig_flags, 'Z'))
flags = "Z";
else
flags = "";
Log(LOG_INFO,
"Peer on connection %d announces itself as \"%s\" using protocol %d.%d (flags: \"%s\").",
Client_Conn(Client), impl,
protohigh, protolow, flags);
}
Client_SetFlags(Client, flags);
}
return CONNECTED;
} /* IRC_PASS */
/**
* Handler for the IRC "USER" command.
*
* See RFC 2812, 3.1.3 "User message".
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @returns CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_USER(CLIENT * Client, REQUEST * Req)
{
CLIENT *c;
char *ptr;
assert(Client != NULL);
assert(Req != NULL);
if (Client_Type(Client) == CLIENT_GOTNICK ||
#ifndef STRICT_RFC
Client_Type(Client) == CLIENT_UNKNOWN ||
#endif
Client_Type(Client) == CLIENT_GOTPASS)
{
/* New connection */
if (Req->argc != 4)
return IRC_WriteStrClient(Client,
ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client),
Req->command);
/* User name: only alphanumeric characters and limited
punctuation is allowed.*/
ptr = Req->argv[0];
while (*ptr) {
if (!isalnum(*ptr) &&
*ptr != '+' && *ptr != '-' &&
*ptr != '.' && *ptr != '_') {
Conn_Close(Client_Conn(Client), NULL,
"Invalid user name", true);
return DISCONNECTED;
}
ptr++;
}
#ifdef IDENTAUTH
ptr = Client_User(Client);
if (!ptr || !*ptr || *ptr == '~')
Client_SetUser(Client, Req->argv[0], false);
#else
Client_SetUser(Client, Req->argv[0], false);
#endif
Client_SetOrigUser(Client, Req->argv[0]);
/* "Real name" or user info text: Don't set it to the empty
* string, the original ircd can't deal with such "real names"
* (e. g. "USER user * * :") ... */
if (*Req->argv[3])
Client_SetInfo(Client, Req->argv[3]);
else
Client_SetInfo(Client, "-");
LogDebug("Connection %d: got valid USER command ...",
Client_Conn(Client));
if (Client_Type(Client) == CLIENT_GOTNICK)
return Login_User(Client);
else
Client_SetType(Client, CLIENT_GOTUSER);
return CONNECTED;
} else if (Client_Type(Client) == CLIENT_SERVER ||
Client_Type(Client) == CLIENT_SERVICE) {
/* Server/service updating an user */
if (Req->argc != 4)
return IRC_WriteStrClient(Client,
ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client),
Req->command);
c = Client_Search(Req->prefix);
if (!c)
return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
Client_ID(Client),
Req->prefix);
Client_SetUser(c, Req->argv[0], true);
Client_SetOrigUser(c, Req->argv[0]);
Client_SetHostname(c, Req->argv[1]);
Client_SetInfo(c, Req->argv[3]);
LogDebug("Connection %d: got valid USER command for \"%s\".",
Client_Conn(Client), Client_Mask(c));
/* RFC 1459 style user registration?
* Introduce client to network: */
if (Client_Type(c) == CLIENT_GOTNICK)
Client_Introduce(Client, c, CLIENT_USER);
return CONNECTED;
} else if (Client_Type(Client) == CLIENT_USER) {
/* Already registered connection */
return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG,
Client_ID(Client));
} else {
/* Unexpected/invalid connection state? */
return IRC_WriteStrClient(Client, ERR_NOTREGISTERED_MSG,
Client_ID(Client));
}
} /* IRC_USER */
/**
* Handler for the IRC "NICK" command.
*
* See RFC 2812, 3.1.2 "Nick message", and RFC 2813, 4.1.3 "Nick".
*
* This function implements the IRC command "NICK" which is used to register
* with the server, to change already registered nicknames and to introduce
* new users which are connected to other servers.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @returns CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_NICK( CLIENT *Client, REQUEST *Req )
{
CLIENT *intr_c, *target, *c;
char *nick, *user, *hostname, *modes, *info;
int token, hops;
assert( Client != NULL );
assert( Req != NULL );
/* Some IRC clients, for example BitchX, send the NICK and USER
* commands in the wrong order ... */
if(Client_Type(Client) == CLIENT_UNKNOWN
|| Client_Type(Client) == CLIENT_GOTPASS
|| Client_Type(Client) == CLIENT_GOTNICK
#ifndef STRICT_RFC
|| Client_Type(Client) == CLIENT_GOTUSER
#endif
|| Client_Type(Client) == CLIENT_USER
|| Client_Type(Client) == CLIENT_SERVICE
|| (Client_Type(Client) == CLIENT_SERVER && Req->argc == 1))
{
/* User registration or change of nickname */
/* Wrong number of arguments? */
if( Req->argc != 1 )
return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID( Client ),
Req->command );
/* Search "target" client */
if( Client_Type( Client ) == CLIENT_SERVER )
{
target = Client_Search( Req->prefix );
if( ! target )
return IRC_WriteStrClient( Client,
ERR_NOSUCHNICK_MSG,
Client_ID( Client ),
Req->argv[0] );
}
else
{
/* Is this a restricted client? */
if( Client_HasMode( Client, 'r' ))
return IRC_WriteStrClient( Client,
ERR_RESTRICTED_MSG,
Client_ID( Client ));
target = Client;
}
#ifndef STRICT_RFC
/* If the clients tries to change to its own nickname we won't
* do anything. This is how the original ircd behaves and some
* clients (for example Snak) expect it to be like this.
* But I doubt that this is "really the right thing" ... */
if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 )
return CONNECTED;
#endif
/* Check that the new nickname is available. Special case:
* the client only changes from/to upper to lower case. */
if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
{
if( ! Client_CheckNick( target, Req->argv[0] ))
return CONNECTED;
}
if (Client_Type(target) != CLIENT_USER &&
Client_Type(target) != CLIENT_SERVICE &&
Client_Type(target) != CLIENT_SERVER) {
/* New client */
LogDebug("Connection %d: got valid NICK command ...",
Client_Conn( Client ));
/* Register new nickname of this client */
Client_SetID( target, Req->argv[0] );
#ifndef STRICT_RFC
if (Conf_AuthPing) {
Conn_SetAuthPing(Client_Conn(Client), rand());
IRC_WriteStrClient(Client, "PING :%ld",
Conn_GetAuthPing(Client_Conn(Client)));
LogDebug("Connection %d: sent AUTH PING %ld ...",
Client_Conn(Client),
Conn_GetAuthPing(Client_Conn(Client)));
}
#endif
/* If we received a valid USER command already then
* register the new client! */
if( Client_Type( Client ) == CLIENT_GOTUSER )
return Login_User( Client );
else
Client_SetType( Client, CLIENT_GOTNICK );
} else {
/* Nickname change */
if (Client_Conn(target) > NONE) {
/* Local client */
Log(LOG_INFO,
"%s \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".",
Client_TypeText(target), Client_Mask(target),
Client_Conn(target), Client_ID(target),
Req->argv[0]);
Conn_UpdateIdle(Client_Conn(target));
} else {
/* Remote client */
LogDebug("%s \"%s\" changed nick: \"%s\" -> \"%s\".",
Client_TypeText(target),
Client_Mask(target), Client_ID(target),
Req->argv[0]);
}
/* Inform all users and servers (which have to know)
* of this nickname change */
if( Client_Type( Client ) == CLIENT_USER )
IRC_WriteStrClientPrefix( Client, Client,
"NICK :%s",
Req->argv[0] );
IRC_WriteStrServersPrefix( Client, target,
"NICK :%s", Req->argv[0] );
IRC_WriteStrRelatedPrefix( target, target, false,
"NICK :%s", Req->argv[0] );
/* Register old nickname for WHOWAS queries */
Client_RegisterWhowas( target );
/* Save new nickname */
Client_SetID( target, Req->argv[0] );
IRC_SetPenalty( target, 2 );
}
return CONNECTED;
} else if(Client_Type(Client) == CLIENT_SERVER ||
Client_Type(Client) == CLIENT_SERVICE) {
/* Server or service introduces new client */
/* Bad number of parameters? */
if (Req->argc != 2 && Req->argc != 7)
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
if (Req->argc >= 7) {
/* RFC 2813 compatible syntax */
nick = Req->argv[0];
hops = atoi(Req->argv[1]);
user = Req->argv[2];
hostname = Req->argv[3];
token = atoi(Req->argv[4]);
modes = Req->argv[5] + 1;
info = Req->argv[6];
} else {
/* RFC 1459 compatible syntax */
nick = Req->argv[0];
hops = 1;
user = Req->argv[0];
hostname = Client_ID(Client);
token = atoi(Req->argv[1]);
modes = "";
info = Req->argv[0];
}
c = Client_Search(nick);
if(c) {
/*
* the new nick is already present on this server:
* the new and the old one have to be disconnected now.
*/
Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
Kill_Nick( Req->argv[0], "Nick collision" );
return CONNECTED;
}
/* Find the Server this client is connected to */
intr_c = Client_GetFromToken(Client, token);
if( ! intr_c )
{
Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
Kill_Nick( Req->argv[0], "Unknown server" );
return CONNECTED;
}
c = Client_NewRemoteUser(intr_c, nick, hops, user, hostname,
token, modes, info, true);
if( ! c )
{
/* out of memory, need to disconnect client to keep network state consistent */
Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
Kill_Nick( Req->argv[0], "Server error" );
return CONNECTED;
}
/* RFC 2813: client is now fully registered, inform all the
* other servers about the new user.
* RFC 1459: announce the new client only after receiving the
* USER command, first we need more information! */
if (Req->argc < 7) {
LogDebug("Client \"%s\" is being registered (RFC 1459) ...",
Client_Mask(c));
Client_SetType(c, CLIENT_GOTNICK);
} else
Client_Introduce(Client, c, CLIENT_USER);
return CONNECTED;
}
else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
} /* IRC_NICK */