/*
* ngIRCd -- The Next Generation IRC Daemon
* Copyright (c)2001-2018 Alexander Barton (alex@barton.de) and Contributors.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* Please read the file COPYING, README and AUTHORS for more information.
*/
#include "portab.h"
/**
* @file
* Login and logout
*/
#include <assert.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include "conn-func.h"
#include "conf.h"
#include "channel.h"
#include "log.h"
#include "login.h"
#include "messages.h"
#include "parse.h"
#include "irc.h"
#include "irc-macros.h"
#include "irc-write.h"
#include "irc-login.h"
static void Change_Nick PARAMS((CLIENT * Origin, CLIENT * Target, char *NewNick,
bool InformClient));
/**
* Handler for the IRC "PASS" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return 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_WriteErrClient(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_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
} else {
/* Registered connection, PASS command is not allowed! */
return IRC_WriteErrClient(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) {
char 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 connection %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 "NICK" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_NICK( CLIENT *Client, REQUEST *Req )
{
CLIENT *intr_c, *target, *c;
CHANNEL *chan;
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 */
_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 1)
/* Search "target" client */
if (Client_Type(Client) == CLIENT_SERVER) {
_IRC_REQUIRE_PREFIX_OR_RETURN_(Client, Req)
target = Client_Search(Req->prefix);
if (!target)
return IRC_WriteErrClient(Client,
ERR_NOSUCHNICK_MSG,
Client_ID(Client),
Req->argv[0]);
} else {
/* Is this a restricted client? */
if (Client_HasMode(Client, 'r'))
return IRC_WriteErrClient(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) {
#ifdef HAVE_ARC4RANDOM
Conn_SetAuthPing(Client_Conn(Client), arc4random());
#else
Conn_SetAuthPing(Client_Conn(Client), rand());
#endif
Conn_WriteStr(Client_Conn(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 */
/* Check that the user isn't on any channels set +N */
if(Client_Type(Client) == CLIENT_USER &&
!Client_HasMode(Client, 'o')) {
chan = Channel_First();
while (chan) {
if(Channel_HasMode(chan, 'N') &&
Channel_IsMemberOf(chan, Client))
return IRC_WriteErrClient(Client,
ERR_NONICKCHANGE_MSG,
Client_ID(Client),
Channel_Name(chan));
chan = Channel_Next(chan);
}
}
Change_Nick(Client, target, Req->argv[0],
Client_Type(Client) == CLIENT_USER ? true : false);
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_WriteErrClient(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]);
return IRC_KillClient(Client, NULL, Req->argv[0],
"Nick collision");
}
/* 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]);
return IRC_KillClient(Client, NULL, Req->argv[0],
"Unknown server");
}
c = Client_NewRemoteUser(intr_c, nick, hops, user, hostname,
token, modes, info, true);
if (!c) {
/* Out of memory, we need to disconnect client to keep
* network state consistent! */
Log(LOG_ALERT,
"Can't create client structure! (on connection %d)",
Client_Conn(Client));
return IRC_KillClient(Client, NULL, Req->argv[0],
"Server error");
}
/* 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_WriteErrClient(Client, ERR_ALREADYREGISTRED_MSG,
Client_ID(Client));
} /* IRC_NICK */
/**
* Handler for the IRC "SVSNICK" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_SVSNICK(CLIENT *Client, REQUEST *Req)
{
CLIENT *from, *target;
assert(Client != NULL);
assert(Req != NULL);
_IRC_REQUIRE_PREFIX_OR_RETURN_(Client, Req)
/* Search the originator */
from = Client_Search(Req->prefix);
if (!from)
from = Client;
/* Search the target */
target = Client_Search(Req->argv[0]);
if (!target || Client_Type(target) != CLIENT_USER)
return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
Client_ID(Client), Req->argv[0]);
if (Client_Conn(target) <= NONE) {
/* We have to forward the message to the server handling
* this user; this is required to make sure all servers
* in the network do follow the nick name change! */
return IRC_WriteStrClientPrefix(Client_NextHop(target), from,
"SVSNICK %s %s",
Req->argv[0], Req->argv[1]);
}
/* Make sure that the new nickname is valid */
if (!Client_CheckNick(from, Req->argv[1]))
return CONNECTED;
Change_Nick(from, target, Req->argv[1], true);
return CONNECTED;
}
/**
* Handler for the IRC "USER" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return 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 */
_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 4)
/* User name: only alphanumeric characters and limited
punctuation is allowed.*/
ptr = Req->argv[0];
while (*ptr) {
if (!isalnum((int)*ptr) &&
*ptr != '+' && *ptr != '-' && *ptr != '@' &&
*ptr != '.' && *ptr != '_') {
Conn_Close(Client_Conn(Client), NULL,
"Invalid user name", true);
return DISCONNECTED;
}
ptr++;
}
/* Save the received username for authentication, and use
* it up to the first '@' as default user name (like ircd2.11,
* bahamut, ircd-seven, ...), prefixed with '~', if needed: */
Client_SetOrigUser(Client, Req->argv[0]);
ptr = strchr(Req->argv[0], '@');
if (ptr)
*ptr = '\0';
#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
/* "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 */
_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 4)
_IRC_REQUIRE_PREFIX_OR_RETURN_(Client, Req)
c = Client_Search(Req->prefix);
if (!c)
return IRC_WriteErrClient(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_WriteErrClient(Client, ERR_ALREADYREGISTRED_MSG,
Client_ID(Client));
} else {
/* Unexpected/invalid connection state? */
return IRC_WriteErrClient(Client, ERR_NOTREGISTERED_MSG,
Client_ID(Client));
}
} /* IRC_USER */
/**
* Handler for the IRC "SERVICE" command.
*
* At the moment ngIRCd doesn't support directly linked services, so this
* function returns ERR_ERRONEUSNICKNAME when the SERVICE command has not been
* received from a peer server.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_SERVICE(CLIENT *Client, REQUEST *Req)
{
CLIENT *c, *intr_c;
char *nick, *user, *host, *info, *modes, *ptr;
int token, hops;
assert(Client != NULL);
assert(Req != NULL);
if (Client_Type(Client) != CLIENT_GOTPASS &&
Client_Type(Client) != CLIENT_SERVER)
return IRC_WriteErrClient(Client, ERR_ALREADYREGISTRED_MSG,
Client_ID(Client));
if (Client_Type(Client) != CLIENT_SERVER)
return IRC_WriteErrClient(Client, ERR_ERRONEUSNICKNAME_MSG,
Client_ID(Client), Req->argv[0]);
nick = Req->argv[0];
user = NULL; host = NULL;
token = atoi(Req->argv[1]);
hops = atoi(Req->argv[4]);
info = Req->argv[5];
/* Validate service name ("nickname") */
c = Client_Search(nick);
if(c) {
/* Nickname collision: disconnect (KILL) both clients! */
Log(LOG_ERR,
"Server %s introduces already registered service \"%s\"!",
Client_ID(Client), nick);
return IRC_KillClient(Client, NULL, nick, "Nick collision");
}
/* Get the server to which the service is connected */
intr_c = Client_GetFromToken(Client, token);
if (! intr_c) {
Log(LOG_ERR,
"Server %s introduces service \"%s\" on unknown server!?",
Client_ID(Client), nick);
return IRC_KillClient(Client, NULL, nick, "Unknown server");
}
/* Get user and host name */
ptr = strchr(nick, '@');
if (ptr) {
*ptr = '\0';
host = ++ptr;
}
if (!host)
host = Client_Hostname(intr_c);
ptr = strchr(nick, '!');
if (ptr) {
*ptr = '\0';
user = ++ptr;
}
if (!user)
user = nick;
/* According to RFC 2812/2813 parameter 4 <type> "is currently reserved
* for future usage"; but we use it to transfer the modes and check
* that the first character is a '+' sign and ignore it otherwise. */
modes = (Req->argv[3][0] == '+') ? ++Req->argv[3] : "";
c = Client_NewRemoteUser(intr_c, nick, hops, user, host,
token, modes, info, true);
if (! c) {
/* Couldn't create client structure, so KILL the service to
* keep network status consistent ... */
Log(LOG_ALERT,
"Can't create client structure! (on connection %d)",
Client_Conn(Client));
return IRC_KillClient(Client, NULL, nick, "Server error");
}
Client_Introduce(Client, c, CLIENT_SERVICE);
return CONNECTED;
} /* IRC_SERVICE */
/**
* Handler for the IRC "WEBIRC" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_WEBIRC(CLIENT *Client, REQUEST *Req)
{
if (!Conf_WebircPwd[0] || strcmp(Req->argv[0], Conf_WebircPwd) != 0)
return IRC_WriteErrClient(Client, ERR_PASSWDMISMATCH_MSG,
Client_ID(Client));
LogDebug("Connection %d: got valid WEBIRC command: user=%s, host=%s, ip=%s",
Client_Conn(Client), Req->argv[1], Req->argv[2], Req->argv[3]);
Client_SetUser(Client, Req->argv[1], true);
Client_SetOrigUser(Client, Req->argv[1]);
if (Conf_DNS)
Client_SetHostname(Client, Req->argv[2]);
else
Client_SetHostname(Client, Req->argv[3]);
Client_SetIPAText(Client, Req->argv[3]);
return CONNECTED;
} /* IRC_WEBIRC */
/**
* Handler for the IRC "QUIT" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_QUIT( CLIENT *Client, REQUEST *Req )
{
CLIENT *target;
char quitmsg[COMMAND_LEN];
assert(Client != NULL);
assert(Req != NULL);
if (Req->argc == 1)
strlcpy(quitmsg, Req->argv[0], sizeof quitmsg);
if (Client_Type(Client) == CLIENT_SERVER) {
/* Server */
_IRC_REQUIRE_PREFIX_OR_RETURN_(Client, Req)
target = Client_Search(Req->prefix);
if (!target) {
Log(LOG_WARNING,
"Got QUIT from %s for unknown client!?",
Client_ID(Client));
return CONNECTED;
}
if (target != Client) {
Client_Destroy(target, "Got QUIT command",
Req->argc == 1 ? quitmsg : NULL, true);
return CONNECTED;
} else {
Conn_Close(Client_Conn(Client), "Got QUIT command",
Req->argc == 1 ? quitmsg : NULL, true);
return DISCONNECTED;
}
} else {
if (Req->argc == 1 && quitmsg[0] != '\"') {
/* " " to avoid confusion */
strlcpy(quitmsg, "\"", sizeof quitmsg);
strlcat(quitmsg, Req->argv[0], sizeof quitmsg-1);
strlcat(quitmsg, "\"", sizeof quitmsg );
}
/* User, Service, or not yet registered */
Conn_Close(Client_Conn(Client), "Got QUIT command",
Req->argc == 1 ? quitmsg : NULL, true);
return DISCONNECTED;
}
} /* IRC_QUIT */
#ifndef STRICT_RFC
/**
* Handler for HTTP command, e.g. GET and POST
*
* We handle these commands here to avoid the quite long timeout when
* some user tries to access this IRC daemon using an web browser ...
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_QUIT_HTTP( CLIENT *Client, REQUEST *Req )
{
Req->argc = 1;
Req->argv[0] = "Oops, HTTP request received? This is IRC!";
return IRC_QUIT(Client, Req);
} /* IRC_QUIT_HTTP */
#endif
/**
* Handler for the IRC "PING" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_PING(CLIENT *Client, REQUEST *Req)
{
CLIENT *target, *from;
assert(Client != NULL);
assert(Req != NULL);
if (Req->argc < 1)
return IRC_WriteErrClient(Client, ERR_NOORIGIN_MSG,
Client_ID(Client));
#ifdef STRICT_RFC
/* Don't ignore additional arguments when in "strict" mode */
_IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
#endif
if (Req->argc > 1) {
/* A target has been specified ... */
target = Client_Search(Req->argv[1]);
if (!target || Client_Type(target) != CLIENT_SERVER)
return IRC_WriteErrClient(Client, ERR_NOSUCHSERVER_MSG,
Client_ID(Client), Req->argv[1]);
if (target != Client_ThisServer()) {
/* Ok, we have to forward the PING */
if (Client_Type(Client) == CLIENT_SERVER) {
_IRC_REQUIRE_PREFIX_OR_RETURN_(Client, Req)
from = Client_Search(Req->prefix);
} else
from = Client;
if (!from)
return IRC_WriteErrClient(Client,
ERR_NOSUCHSERVER_MSG,
Client_ID(Client), Req->prefix);
return IRC_WriteStrClientPrefix(target, from,
"PING %s :%s", Req->argv[0],
Req->argv[1] );
}
}
if (Client_Type(Client) == CLIENT_SERVER) {
if (Req->prefix)
from = Client_Search(Req->prefix);
else
from = Client;
} else
from = Client_ThisServer();
if (!from)
return IRC_WriteErrClient(Client, ERR_NOSUCHSERVER_MSG,
Client_ID(Client), Req->prefix);
Log(LOG_DEBUG, "Connection %d: got PING, sending PONG ...",
Client_Conn(Client));
#ifdef STRICT_RFC
return IRC_WriteStrClient(Client, "PONG %s :%s",
Client_ID(from), Client_ID(Client));
#else
/* Some clients depend on the argument being returned in the PONG
* reply (not mentioned in any RFC, though) */
return IRC_WriteStrClient(Client, "PONG %s :%s",
Client_ID(from), Req->argv[0]);
#endif
} /* IRC_PING */
/**
* Handler for the IRC "PONG" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_PONG(CLIENT *Client, REQUEST *Req)
{
CLIENT *target, *from;
CONN_ID conn;
#ifndef STRICT_RFC
long auth_ping;
#endif
char *s;
assert(Client != NULL);
assert(Req != NULL);
/* Wrong number of arguments? */
if (Req->argc < 1) {
if (Client_Type(Client) == CLIENT_USER)
return IRC_WriteErrClient(Client, ERR_NOORIGIN_MSG,
Client_ID(Client));
else
return CONNECTED;
}
if (Client_Type(Client) == CLIENT_USER) {
_IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
}
/* Forward? */
if (Req->argc == 2 && Client_Type(Client) == CLIENT_SERVER) {
_IRC_REQUIRE_PREFIX_OR_RETURN_(Client, Req)
target = Client_Search(Req->argv[0]);
if (!target)
return IRC_WriteErrClient(Client, ERR_NOSUCHSERVER_MSG,
Client_ID(Client), Req->argv[0]);
from = Client_Search(Req->prefix);
if (target != Client_ThisServer() && target != from) {
/* Ok, we have to forward the message. */
if (!from)
return IRC_WriteErrClient(Client,
ERR_NOSUCHSERVER_MSG,
Client_ID(Client), Req->prefix);
if (Client_Type(Client_NextHop(target)) != CLIENT_SERVER)
s = Client_ID(from);
else
s = Req->argv[0];
return IRC_WriteStrClientPrefix(target, from,
"PONG %s :%s", s, Req->argv[1]);
}
}
/* The connection timestamp has already been updated when the data has
* been read from so socket, so we don't need to update it here. */
conn = Client_Conn(Client);
#ifndef STRICT_RFC
/* Check authentication PING-PONG ... */
auth_ping = Conn_GetAuthPing(conn);
if (auth_ping) {
LogDebug("AUTH PONG: waiting for token \"%ld\", got \"%s\" ...",
auth_ping, Req->argv[0]);
if (auth_ping == atol(Req->argv[0])) {
Conn_SetAuthPing(conn, 0);
if (Client_Type(Client) == CLIENT_WAITAUTHPING)
Login_User(Client);
} else
if (!IRC_WriteStrClient(Client,
"NOTICE %s :To connect, type /QUOTE PONG %ld",
Client_ID(Client), auth_ping))
return DISCONNECTED;
}
#endif
if (Client_Type(Client) == CLIENT_SERVER && Conn_LastPing(conn) == 0) {
Log(LOG_INFO,
"Synchronization with \"%s\" done (connection %d): %ld second%s [%ld users, %ld channels].",
Client_ID(Client), conn,
(long)(time(NULL) - Conn_GetSignon(conn)),
time(NULL) - Conn_GetSignon(conn) == 1 ? "" : "s",
Client_UserCount(), Channel_CountVisible(NULL));
}
#ifdef DEBUG
else {
if (Conn_LastPing(conn) > 1)
LogDebug("Connection %d: received PONG. Lag: %ld seconds.",
conn, (long)(time(NULL) - Conn_LastPing(conn)));
else
LogDebug("Got unexpected PONG on connection %d. Ignored.",
conn);
}
#endif
/* We got a PONG, so signal that none is pending on this connection. */
Conn_UpdatePing(conn, 1);
return CONNECTED;
} /* IRC_PONG */
/**
* Change the nickname of a client.
*
* @param Origin The client which caused the nickname change.
* @param Target The client of which the nickname should be changed.
* @param NewNick The new nickname.
*/
static void
Change_Nick(CLIENT *Origin, CLIENT *Target, char *NewNick, bool InformClient)
{
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), NewNick);
Conn_UpdateIdle(Client_Conn(Target));
} else {
/* Remote client */
LogDebug("%s \"%s\" changed nick: \"%s\" -> \"%s\".",
Client_TypeText(Target),
Client_Mask(Target), Client_ID(Target), NewNick);
}
/* Inform all servers and users (which have to know) of the new name */
if (InformClient) {
IRC_WriteStrClientPrefix(Target, Target, "NICK :%s", NewNick);
IRC_WriteStrServersPrefix(NULL, Target, "NICK :%s", NewNick);
} else
IRC_WriteStrServersPrefix(Origin, Target, "NICK :%s", NewNick);
IRC_WriteStrRelatedPrefix(Target, Target, false, "NICK :%s", NewNick);
/* Register old nickname for WHOWAS queries */
Client_RegisterWhowas(Target);
/* Save new nickname */
Client_SetID(Target, NewNick);
}
/* -eof- */
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