/**
* Handler for the IRC "ERROR" 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_ERROR(CLIENT *Client, REQUEST *Req)
{
assert( Client != NULL );
assert( Req != NULL );
if (Client_Type(Client) != CLIENT_GOTPASS
&& Client_Type(Client) != CLIENT_GOTPASS_2813
&& Client_Type(Client) != CLIENT_UNKNOWNSERVER
&& Client_Type(Client) != CLIENT_SERVER
&& Client_Type(Client) != CLIENT_SERVICE) {
LogDebug("Ignored ERROR command from \"%s\" ...",
Client_Mask(Client));
IRC_SetPenalty(Client, 2);
return CONNECTED;
}
if (Req->argc < 1)
Log(LOG_NOTICE, "Got ERROR from \"%s\"!",
Client_Mask(Client));
else
Log(LOG_NOTICE, "Got ERROR from \"%s\": \"%s\"!",
Client_Mask(Client), Req->argv[0]);
return CONNECTED;
} /* IRC_ERROR */
/**
* Handler for the IRC "HELP" 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_HELP(CLIENT *Client, REQUEST *Req)
{
COMMAND *cmd;
assert(Client != NULL);
assert(Req != NULL);
IRC_SetPenalty(Client, 2);
if ((Req->argc == 0 && array_bytes(&Conf_Helptext) > 0)
|| (Req->argc >= 1 && strcasecmp(Req->argv[0], "Commands") != 0)) {
/* Help text available and requested */
if (Req->argc >= 1)
return Help(Client, Req->argv[0]);
if (!Help(Client, "Intro"))
return DISCONNECTED;
return CONNECTED;
}
cmd = Parse_GetCommandStruct();
while(cmd->name) {
if (!IRC_WriteStrClient(Client, "NOTICE %s :%s",
Client_ID(Client), cmd->name))
return DISCONNECTED;
cmd++;
}
return CONNECTED;
} /* IRC_HELP */
/**
* Finish client registration.
*
* Introduce the new client to the network and send all "hello messages"
* to it after authentication has been succeeded.
*
* @param Client The client logging in.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
Login_User_PostAuth(CLIENT *Client)
{
REQUEST Req;
char modes[CLIENT_MODE_LEN + 1];
assert(Client != NULL);
if (Class_HandleServerBans(Client) != CONNECTED)
return DISCONNECTED;
Client_Introduce(NULL, Client, CLIENT_USER);
if (!IRC_WriteStrClient
(Client, RPL_WELCOME_MSG, Client_ID(Client), Client_Mask(Client)))
return false;
if (!IRC_WriteStrClient
(Client, RPL_YOURHOST_MSG, Client_ID(Client),
Client_ID(Client_ThisServer()), PACKAGE_VERSION, HOST_CPU,
HOST_VENDOR, HOST_OS))
return false;
if (!IRC_WriteStrClient
(Client, RPL_CREATED_MSG, Client_ID(Client), NGIRCd_StartStr))
return false;
if (!IRC_WriteStrClient
(Client, RPL_MYINFO_MSG, Client_ID(Client),
Client_ID(Client_ThisServer()), PACKAGE_VERSION, USERMODES,
CHANMODES))
return false;
/* Features supported by this server (005 numeric, ISUPPORT),
* see <http://www.irc.org/tech_docs/005.html> for details. */
if (!IRC_Send_ISUPPORT(Client))
return DISCONNECTED;
if (!IRC_Send_LUSERS(Client))
return DISCONNECTED;
if (!IRC_Show_MOTD(Client))
return DISCONNECTED;
/* Set default user modes */
if (Conf_DefaultUserModes[0]) {
snprintf(modes, sizeof(modes), "+%s", Conf_DefaultUserModes);
Req.prefix = Client_ID(Client_ThisServer());
Req.command = "MODE";
Req.argc = 2;
Req.argv[0] = Client_ID(Client);
Req.argv[1] = modes;
IRC_MODE(Client, &Req);
} else
IRC_SetPenalty(Client, 1);
return CONNECTED;
}
/**
* Check if a list limit is reached and inform client accordingly.
*
* @param From The client.
* @param Count Reply item count.
* @param Limit Reply limit.
* @param Name Name of the list.
* @return true if list limit has been reached; false otherwise.
*/
GLOBAL bool
IRC_CheckListTooBig(CLIENT *From, const int Count, const int Limit,
const char *Name)
{
assert(From != NULL);
assert(Count >= 0);
assert(Limit > 0);
assert(Name != NULL);
if (Count < Limit)
return false;
(void)IRC_WriteStrClient(From,
"NOTICE %s :%s list limit (%d) reached!",
Client_ID(From), Name, Limit);
IRC_SetPenalty(From, 2);
return true;
}
GLOBAL bool
IRC_HELP( CLIENT *Client, REQUEST *Req )
{
COMMAND *cmd;
assert( Client != NULL );
assert( Req != NULL );
/* Bad number of arguments? */
if( Req->argc > 0 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
cmd = Parse_GetCommandStruct( );
while( cmd->name )
{
if( ! IRC_WriteStrClient( Client, "NOTICE %s :%s", Client_ID( Client ), cmd->name )) return DISCONNECTED;
cmd++;
}
IRC_SetPenalty( Client, 2 );
return CONNECTED;
} /* IRC_HELP */
/**
* Handler for the IRC "ERROR" 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_ERROR(CLIENT *Client, REQUEST *Req)
{
char *msg;
assert( Client != NULL );
assert( Req != NULL );
if (Client_Type(Client) != CLIENT_GOTPASS
&& Client_Type(Client) != CLIENT_GOTPASS_2813
&& Client_Type(Client) != CLIENT_UNKNOWNSERVER
&& Client_Type(Client) != CLIENT_SERVER
&& Client_Type(Client) != CLIENT_SERVICE) {
LogDebug("Ignored ERROR command from \"%s\" ...",
Client_Mask(Client));
IRC_SetPenalty(Client, 2);
return CONNECTED;
}
if (Req->argc < 1) {
msg = "Got ERROR command";
Log(LOG_NOTICE, "Got ERROR from \"%s\"!",
Client_Mask(Client));
} else {
msg = Req->argv[0];
Log(LOG_NOTICE, "Got ERROR from \"%s\": \"%s\"!",
Client_Mask(Client), msg);
}
if (Client_Conn(Client) != NONE) {
Conn_Close(Client_Conn(Client), NULL, msg, false);
return DISCONNECTED;
}
return CONNECTED;
} /* IRC_ERROR */
GLOBAL bool
IRC_TRACE( CLIENT *Client, REQUEST *Req )
{
CLIENT *from, *target, *c;
CONN_ID idx, idx2;
char user[CLIENT_USER_LEN];
assert( Client != NULL );
assert( Req != NULL );
/* Bad number of arguments? */
if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
/* Search sender */
if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
else from = Client;
if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
/* Search target */
if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
else target = Client_ThisServer( );
/* Forward command to other server? */
if( target != Client_ThisServer( ))
{
if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
/* Send RPL_TRACELINK back to initiator */
idx = Client_Conn( Client ); assert( idx > NONE );
idx2 = Client_Conn( Client_NextHop( target )); assert( idx2 > NONE );
if( ! IRC_WriteStrClient( from, RPL_TRACELINK_MSG, Client_ID( from ), PACKAGE_NAME, PACKAGE_VERSION, Client_ID( target ), Client_ID( Client_NextHop( target )), Option_String( idx2 ), time( NULL ) - Conn_StartTime( idx2 ), Conn_SendQ( idx ), Conn_SendQ( idx2 ))) return DISCONNECTED;
/* Forward command */
IRC_WriteStrClientPrefix( target, from, "TRACE %s", Req->argv[0] );
return CONNECTED;
}
/* Infos about all connected servers */
c = Client_First( );
while( c )
{
if( Client_Conn( c ) > NONE )
{
/* Local client */
if( Client_Type( c ) == CLIENT_SERVER )
{
/* Server link */
strlcpy( user, Client_User( c ), sizeof( user ));
if( user[0] == '~' ) strlcpy( user, "unknown", sizeof( user ));
if( ! IRC_WriteStrClient( from, RPL_TRACESERVER_MSG, Client_ID( from ), Client_ID( c ), user, Client_Hostname( c ), Client_Mask( Client_ThisServer( )), Option_String( Client_Conn( c )))) return DISCONNECTED;
}
if(( Client_Type( c ) == CLIENT_USER ) && ( strchr( Client_Modes( c ), 'o' )))
{
/* IRC Operator */
if( ! IRC_WriteStrClient( from, RPL_TRACEOPERATOR_MSG, Client_ID( from ), Client_ID( c ))) return DISCONNECTED;
}
}
c = Client_Next( c );
}
IRC_SetPenalty( Client, 3 );
return IRC_WriteStrClient( from, RPL_TRACEEND_MSG, Client_ID( from ), Conf_ServerName, PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_DebugLevel );
} /* IRC_TRACE */
/**
* Handle channel mode and channel-user mode changes
*/
static bool
Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
{
char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
argadd[CLIENT_PASS_LEN], *mode_ptr, *o_mode_ptr;
bool connected, set, skiponce, retval, use_servermode,
is_halfop, is_op, is_admin, is_owner, is_machine, is_oper;
int mode_arg, arg_arg, mode_arg_count = 0;
CLIENT *client;
long l;
size_t len;
is_halfop = is_op = is_admin = is_owner = is_machine = is_oper = false;
if (Channel_IsModeless(Channel))
return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
Client_ID(Client), Channel_Name(Channel));
/* Mode request: let's answer it :-) */
if (Req->argc <= 1)
return Channel_Mode_Answer_Request(Origin, Channel);
/* Check if origin is oper and opers can use mode */
use_servermode = Conf_OperServerMode;
if(Client_OperByMe(Client) && Conf_OperCanMode) {
is_oper = true;
}
/* Check if client is a server/service */
if(Client_Type(Client) == CLIENT_SERVER ||
Client_Type(Client) == CLIENT_SERVICE) {
is_machine = true;
}
/* Check if client is member of channel or an oper or an server/service */
if(!Channel_IsMemberOf(Channel, Client) && !is_oper && !is_machine)
return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
Client_ID(Origin),
Channel_Name(Channel));
mode_arg = 1;
mode_ptr = Req->argv[mode_arg];
if (Req->argc > mode_arg + 1)
arg_arg = mode_arg + 1;
else
arg_arg = -1;
/* Initial state: set or unset modes? */
skiponce = false;
switch (*mode_ptr) {
case '-':
set = false;
break;
case '+':
set = true;
break;
default:
set = true;
skiponce = true;
}
/* Prepare reply string */
strcpy(the_modes, set ? "+" : "-");
the_args[0] = '\0';
x[1] = '\0';
connected = CONNECTED;
while (mode_ptr) {
if (!skiponce)
mode_ptr++;
if (!*mode_ptr) {
/* Try next argument if there's any */
if (arg_arg < 0)
break;
if (arg_arg > mode_arg)
mode_arg = arg_arg;
else
mode_arg++;
if (mode_arg >= Req->argc)
break;
mode_ptr = Req->argv[mode_arg];
if (Req->argc > mode_arg + 1)
arg_arg = mode_arg + 1;
else
arg_arg = -1;
}
skiponce = false;
switch (*mode_ptr) {
case '+':
case '-':
if (((*mode_ptr == '+') && !set)
|| ((*mode_ptr == '-') && set)) {
/* Action modifier ("+"/"-") must be changed ... */
len = strlen(the_modes) - 1;
if (the_modes[len] == '+' || the_modes[len] == '-') {
/* Adjust last action modifier in result */
the_modes[len] = *mode_ptr;
} else {
/* Append modifier character to result string */
x[0] = *mode_ptr;
strlcat(the_modes, x, sizeof(the_modes));
}
set = *mode_ptr == '+';
}
continue;
}
/* Are there arguments left? */
if (arg_arg >= Req->argc)
arg_arg = -1;
if(!is_machine && !is_oper) {
o_mode_ptr = Channel_UserModes(Channel, Client);
while( *o_mode_ptr ) {
if ( *o_mode_ptr == 'q')
is_owner = true;
if ( *o_mode_ptr == 'a')
is_admin = true;
if ( *o_mode_ptr == 'o')
is_op = true;
if ( *o_mode_ptr == 'h')
is_halfop = true;
o_mode_ptr++;
}
}
/* Validate modes */
x[0] = '\0';
argadd[0] = '\0';
client = NULL;
switch (*mode_ptr) {
/* --- Channel modes --- */
case 'R': /* Registered users only */
case 's': /* Secret channel */
case 'z': /* Secure connections only */
if(!is_oper && !is_machine && !is_owner &&
!is_admin && !is_op) {
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin), Channel_Name(Channel));
goto chan_exit;
}
case 'i': /* Invite only */
case 'V': /* Invite disallow */
case 'M': /* Only identified nicks can write */
case 'm': /* Moderated */
case 'n': /* Only members can write */
case 'Q': /* No kicks */
case 't': /* Topic locked */
if(is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop)
x[0] = *mode_ptr;
else
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin), Channel_Name(Channel));
break;
case 'k': /* Channel key */
if (Mode_Limit_Reached(Client, mode_arg_count++))
goto chan_exit;
if (!set) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop)
x[0] = *mode_ptr;
else
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
break;
}
if (arg_arg > mode_arg) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop) {
Channel_ModeDel(Channel, 'k');
Channel_SetKey(Channel,
Req->argv[arg_arg]);
strlcpy(argadd, Channel_Key(Channel),
sizeof(argadd));
x[0] = *mode_ptr;
} else {
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
}
Req->argv[arg_arg][0] = '\0';
arg_arg++;
} else {
#ifdef STRICT_RFC
/* Only send error message in "strict" mode,
* this is how ircd2.11 and others behave ... */
connected = IRC_WriteStrClient(Origin,
ERR_NEEDMOREPARAMS_MSG,
Client_ID(Origin), Req->command);
#endif
goto chan_exit;
}
break;
case 'l': /* Member limit */
if (Mode_Limit_Reached(Client, mode_arg_count++))
goto chan_exit;
if (!set) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop)
x[0] = *mode_ptr;
else
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
break;
}
if (arg_arg > mode_arg) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop) {
l = atol(Req->argv[arg_arg]);
if (l > 0 && l < 0xFFFF) {
Channel_ModeDel(Channel, 'l');
Channel_SetMaxUsers(Channel, l);
snprintf(argadd, sizeof(argadd),
"%ld", l);
x[0] = *mode_ptr;
}
} else {
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
}
Req->argv[arg_arg][0] = '\0';
arg_arg++;
} else {
#ifdef STRICT_RFC
/* Only send error message in "strict" mode,
* this is how ircd2.11 and others behave ... */
connected = IRC_WriteStrClient(Origin,
ERR_NEEDMOREPARAMS_MSG,
Client_ID(Origin), Req->command);
#endif
goto chan_exit;
}
break;
case 'O': /* IRC operators only */
if (set) {
/* Only IRC operators are allowed to
* set the 'O' channel mode! */
if(is_oper || is_machine)
x[0] = 'O';
else
connected = IRC_WriteStrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
} else if(is_oper || is_machine || is_owner ||
is_admin || is_op)
x[0] = 'O';
else
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
break;
case 'P': /* Persistent channel */
if (set) {
/* Only IRC operators are allowed to
* set the 'P' channel mode! */
if(is_oper || is_machine)
x[0] = 'P';
else
connected = IRC_WriteStrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
} else if(is_oper || is_machine || is_owner ||
is_admin || is_op)
x[0] = 'P';
else
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
break;
/* --- Channel user modes --- */
case 'q': /* Owner */
case 'a': /* Channel admin */
if(!is_oper && !is_machine && !is_owner && !is_admin) {
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPPRIVTOOLOW_MSG,
Client_ID(Origin),
Channel_Name(Channel));
goto chan_exit;
}
case 'o': /* Channel operator */
if(!is_oper && !is_machine && !is_owner &&
!is_admin && !is_op) {
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
goto chan_exit;
}
case 'h': /* Half Op */
if(!is_oper && !is_machine && !is_owner &&
!is_admin && !is_op) {
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
goto chan_exit;
}
case 'v': /* Voice */
if (arg_arg > mode_arg) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop) {
client = Client_Search(Req->argv[arg_arg]);
if (client)
x[0] = *mode_ptr;
else
connected = IRC_WriteStrClient(Origin,
ERR_NOSUCHNICK_MSG,
Client_ID(Origin),
Req->argv[arg_arg]);
} else {
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
}
Req->argv[arg_arg][0] = '\0';
arg_arg++;
} else {
#ifdef STRICT_RFC
/* Report an error to the client, when a user
* mode should be changed but no nickname is
* given. But don't do it when not in "strict"
* mode, because most other servers don't do
* it as well and some clients send "wired"
* MODE commands like "MODE #chan -ooo nick". */
connected = IRC_WriteStrClient(Origin,
ERR_NEEDMOREPARAMS_MSG,
Client_ID(Origin), Req->command);
#endif
goto chan_exit;
}
break;
/* --- Channel lists --- */
case 'I': /* Invite lists */
case 'b': /* Ban lists */
case 'e': /* Channel exception lists */
if (Mode_Limit_Reached(Client, mode_arg_count++))
goto chan_exit;
if (arg_arg > mode_arg) {
/* modify list */
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop) {
connected = set
? Add_To_List(*mode_ptr, Origin,
Client, Channel,
Req->argv[arg_arg])
: Del_From_List(*mode_ptr, Origin,
Client, Channel,
Req->argv[arg_arg]);
} else {
connected = IRC_WriteStrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
}
Req->argv[arg_arg][0] = '\0';
arg_arg++;
} else {
switch (*mode_ptr) {
case 'I':
Channel_ShowInvites(Origin, Channel);
break;
case 'b':
Channel_ShowBans(Origin, Channel);
break;
case 'e':
Channel_ShowExcepts(Origin, Channel);
break;
}
}
break;
default:
if (Client_Type(Client) != CLIENT_SERVER) {
Log(LOG_DEBUG,
"Unknown mode \"%c%c\" from \"%s\" on %s!?",
set ? '+' : '-', *mode_ptr,
Client_ID(Origin), Channel_Name(Channel));
connected = IRC_WriteStrClient(Origin,
ERR_UNKNOWNMODE_MSG,
Client_ID(Origin), *mode_ptr,
Channel_Name(Channel));
x[0] = '\0';
} else {
Log(LOG_DEBUG,
"Handling unknown mode \"%c%c\" from \"%s\" on %s ...",
set ? '+' : '-', *mode_ptr,
Client_ID(Origin), Channel_Name(Channel));
x[0] = *mode_ptr;
}
}
if (!connected)
break;
/* Is there a valid mode change? */
if (!x[0])
continue;
/* Validate target client */
if (client && (!Channel_IsMemberOf(Channel, client))) {
if (!IRC_WriteStrClient
(Origin, ERR_USERNOTINCHANNEL_MSG,
Client_ID(Origin), Client_ID(client),
Channel_Name(Channel)))
break;
continue;
}
if (client) {
/* Channel-User-Mode */
retval = set
? Channel_UserModeAdd(Channel, client, x[0])
: Channel_UserModeDel(Channel, client, x[0]);
if (retval) {
strlcat(the_args, " ", sizeof(the_args));
strlcat(the_args, Client_ID(client),
sizeof(the_args));
strlcat(the_modes, x, sizeof(the_modes));
LogDebug
("User \"%s\": Mode change on %s, now \"%s\"",
Client_Mask(client), Channel_Name(Channel),
Channel_UserModes(Channel, client));
}
} else {
/* Channel-Mode */
retval = set
? Channel_ModeAdd(Channel, x[0])
: Channel_ModeDel(Channel, x[0]);
if (retval) {
strlcat(the_modes, x, sizeof(the_modes));
LogDebug("Channel %s: Mode change, now \"%s\".",
Channel_Name(Channel),
Channel_Modes(Channel));
}
}
/* Are there additional arguments to add? */
if (argadd[0]) {
strlcat(the_args, " ", sizeof(the_args));
strlcat(the_args, argadd, sizeof(the_args));
}
}
chan_exit:
/* Are there changed modes? */
if (the_modes[1]) {
/* Clean up mode string */
len = strlen(the_modes) - 1;
if ((the_modes[len] == '+') || (the_modes[len] == '-'))
the_modes[len] = '\0';
if (Client_Type(Client) == CLIENT_SERVER) {
/* MODE requests for local channels from other servers
* are definitely invalid! */
if (Channel_IsLocal(Channel)) {
Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
return CONNECTED;
}
/* Forward mode changes to channel users and all the
* other remote servers: */
IRC_WriteStrServersPrefix(Client, Origin,
"MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
IRC_WriteStrChannelPrefix(Client, Channel, Origin,
false, "MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
} else {
if (use_servermode)
Origin = Client_ThisServer();
/* Send reply to client and inform other servers and channel users */
connected = IRC_WriteStrClientPrefix(Client, Origin,
"MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
/* Only forward requests for non-local channels */
if (!Channel_IsLocal(Channel))
IRC_WriteStrServersPrefix(Client, Origin,
"MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
IRC_WriteStrChannelPrefix(Client, Channel, Origin,
false, "MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
}
}
IRC_SetPenalty(Client, 1);
return connected;
} /* Channel_Mode */
/**
* Handle client mode requests
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @param Origin The originator of the MODE command (prefix).
* @param Target The target (client) of this MODE command.
* @returns CONNECTED or DISCONNECTED.
*/
static bool
Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
{
char the_modes[COMMAND_LEN], x[2], *mode_ptr;
bool ok, set;
bool send_RPL_HOSTHIDDEN_MSG = false;
int mode_arg;
size_t len;
/* Is the client allowed to request or change the modes? */
if (Client_Type(Client) == CLIENT_USER) {
/* Users are only allowed to manipulate their own modes! */
if (Target != Client)
return IRC_WriteStrClient(Client,
ERR_USERSDONTMATCH_MSG,
Client_ID(Client));
}
/* Mode request: let's answer it :-) */
if (Req->argc == 1)
return IRC_WriteStrClient(Origin, RPL_UMODEIS_MSG,
Client_ID(Target),
Client_Modes(Target));
mode_arg = 1;
mode_ptr = Req->argv[mode_arg];
/* Initial state: set or unset modes? */
if (*mode_ptr == '+') {
set = true;
strcpy(the_modes, "+");
} else if (*mode_ptr == '-') {
set = false;
strcpy(the_modes, "-");
} else
return IRC_WriteStrClient(Origin, ERR_UMODEUNKNOWNFLAG_MSG,
Client_ID(Origin));
x[1] = '\0';
ok = CONNECTED;
while (mode_ptr) {
mode_ptr++;
if (!*mode_ptr) {
/* Try next argument if there's any */
mode_arg++;
if (mode_arg < Req->argc)
mode_ptr = Req->argv[mode_arg];
else
break;
}
switch(*mode_ptr) {
case '+':
case '-':
if ((*mode_ptr == '+' && !set)
|| (*mode_ptr == '-' && set)) {
/* Action modifier ("+"/"-") must be changed */
len = strlen(the_modes) - 1;
if (the_modes[len] == '+'
|| the_modes[len] == '-') {
/* Last character in the "result
* string" was an "action", so just
* overwrite it with the new action */
the_modes[len] = *mode_ptr;
} else {
/* Append new modifier character to
* the resulting mode string */
x[0] = *mode_ptr;
strlcat(the_modes, x,
sizeof(the_modes));
}
if (*mode_ptr == '+')
set = true;
else
set = false;
}
continue;
}
/* Validate modes */
x[0] = '\0';
switch (*mode_ptr) {
case 'b': /* Block private msgs */
case 'C': /* Only messages from clients sharing a channel */
case 'i': /* Invisible */
case 's': /* Server messages */
case 'w': /* Wallops messages */
x[0] = *mode_ptr;
break;
case 'a': /* Away */
if (Client_Type(Client) == CLIENT_SERVER) {
x[0] = 'a';
Client_SetAway(Origin, DEFAULT_AWAY_MSG);
} else
ok = IRC_WriteStrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
break;
case 'B': /* Bot */
if (Client_HasMode(Client, 'r'))
ok = IRC_WriteStrClient(Origin,
ERR_RESTRICTED_MSG,
Client_ID(Origin));
else
x[0] = 'B';
break;
case 'c': /* Receive connect notices
* (only settable by IRC operators!) */
if (!set || Client_Type(Client) == CLIENT_SERVER
|| Client_OperByMe(Origin))
x[0] = 'c';
else
ok = IRC_WriteStrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
break;
case 'o': /* IRC operator (only unsettable!) */
if (!set || Client_Type(Client) == CLIENT_SERVER) {
Client_SetOperByMe(Target, false);
x[0] = 'o';
} else
ok = IRC_WriteStrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
break;
case 'q': /* KICK-protected user */
if (!set || Client_Type(Client) == CLIENT_SERVER
|| Client_OperByMe(Origin))
x[0] = 'q';
else
ok = IRC_WriteStrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
break;
case 'r': /* Restricted (only settable) */
if (set || Client_Type(Client) == CLIENT_SERVER)
x[0] = 'r';
else
ok = IRC_WriteStrClient(Origin,
ERR_RESTRICTED_MSG,
Client_ID(Origin));
break;
case 'R': /* Registered (not [un]settable by clients) */
if (Client_Type(Client) == CLIENT_SERVER)
x[0] = 'R';
else
ok = IRC_WriteStrClient(Origin,
ERR_NICKREGISTER_MSG,
Client_ID(Origin));
break;
case 'x': /* Cloak hostname */
if (Client_HasMode(Client, 'r'))
ok = IRC_WriteStrClient(Origin,
ERR_RESTRICTED_MSG,
Client_ID(Origin));
else if (!set || Conf_CloakHostModeX[0]
|| Client_Type(Client) == CLIENT_SERVER
|| Client_OperByMe(Client)) {
x[0] = 'x';
send_RPL_HOSTHIDDEN_MSG = true;
} else
ok = IRC_WriteStrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
break;
default:
if (Client_Type(Client) != CLIENT_SERVER) {
Log(LOG_DEBUG,
"Unknown mode \"%c%c\" from \"%s\"!?",
set ? '+' : '-', *mode_ptr,
Client_ID(Origin));
ok = IRC_WriteStrClient(Origin,
ERR_UMODEUNKNOWNFLAG2_MSG,
Client_ID(Origin),
set ? '+' : '-',
*mode_ptr);
x[0] = '\0';
} else {
Log(LOG_DEBUG,
"Handling unknown mode \"%c%c\" from \"%s\" for \"%s\" ...",
set ? '+' : '-', *mode_ptr,
Client_ID(Origin), Client_ID(Target));
x[0] = *mode_ptr;
}
}
if (!ok)
break;
/* Is there a valid mode change? */
if (!x[0])
continue;
if (set) {
if (Client_ModeAdd(Target, x[0]))
strlcat(the_modes, x, sizeof(the_modes));
} else {
if (Client_ModeDel(Target, x[0]))
strlcat(the_modes, x, sizeof(the_modes));
}
}
/* Are there changed modes? */
if (the_modes[1]) {
/* Remove needless action modifier characters */
len = strlen(the_modes) - 1;
if (the_modes[len] == '+' || the_modes[len] == '-')
the_modes[len] = '\0';
if (Client_Type(Client) == CLIENT_SERVER) {
/* Forward modes to other servers */
if (Client_Conn(Target) != NONE) {
/* Remote server (service?) changed modes
* for one of our clients. Inform it! */
IRC_WriteStrClientPrefix(Target, Origin,
"MODE %s :%s",
Client_ID(Target),
the_modes);
}
IRC_WriteStrServersPrefix(Client, Origin,
"MODE %s :%s",
Client_ID(Target),
the_modes);
} else {
/* Send reply to client and inform other servers */
ok = IRC_WriteStrClientPrefix(Client, Origin,
"MODE %s :%s",
Client_ID(Target),
the_modes);
IRC_WriteStrServersPrefix(Client, Origin,
"MODE %s :%s",
Client_ID(Target),
the_modes);
}
if (send_RPL_HOSTHIDDEN_MSG && Client_Conn(Target) > NONE) {
/* A new (cloaked) hostname must be annoucned */
IRC_WriteStrClientPrefix(Target, Origin,
RPL_HOSTHIDDEN_MSG,
Client_ID(Target),
Client_HostnameDisplayed(Target));
}
LogDebug("%s \"%s\": Mode change, now \"%s\".",
Client_TypeText(Target), Client_Mask(Target),
Client_Modes(Target));
}
IRC_SetPenalty(Client, 1);
return ok;
} /* Client_Mode */
static bool
Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
{
CLIENT *cl, *from;
CL2CHAN *cl2chan;
CHANNEL *chan;
char *currentTarget = Req->argv[0];
char *lastCurrentTarget = NULL;
char *message = NULL;
assert(Client != NULL);
assert(Req != NULL);
if (Req->argc == 0) {
if (!SendErrors)
return CONNECTED;
return IRC_WriteErrClient(Client, ERR_NORECIPIENT_MSG,
Client_ID(Client), Req->command);
}
if (Req->argc == 1) {
if (!SendErrors)
return CONNECTED;
return IRC_WriteErrClient(Client, ERR_NOTEXTTOSEND_MSG,
Client_ID(Client));
}
if (Req->argc > 2) {
if (!SendErrors)
return CONNECTED;
IRC_SetPenalty(Client, 2);
return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
}
if (Client_Type(Client) == CLIENT_SERVER)
from = Client_Search(Req->prefix);
else
from = Client;
if (!from)
return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
Client_ID(Client), Req->prefix);
#ifdef ICONV
if (Client_Conn(Client) > NONE)
message = Conn_EncodingFrom(Client_Conn(Client), Req->argv[1]);
else
#endif
message = Req->argv[1];
/* handle msgtarget = msgto *("," msgto) */
currentTarget = strtok_r(currentTarget, ",", &lastCurrentTarget);
ngt_UpperStr(Req->command);
while (currentTarget) {
/* Check for and handle valid <msgto> of form:
* RFC 2812 2.3.1:
* msgto = channel / ( user [ "%" host ] "@" servername )
* msgto =/ ( user "%" host ) / targetmask
* msgto =/ nickname / ( nickname "!" user "@" host )
*/
if (strchr(currentTarget, '!') == NULL)
/* nickname */
cl = Client_Search(currentTarget);
else
cl = NULL;
if (cl == NULL) {
/* If currentTarget isn't a nickname check for:
* user ["%" host] "@" servername
* user "%" host
* nickname "!" user "@" host
*/
char target[COMMAND_LEN];
char * nick = NULL;
char * user = NULL;
char * host = NULL;
char * server = NULL;
strlcpy(target, currentTarget, COMMAND_LEN);
server = strchr(target, '@');
if (server) {
*server = '\0';
server++;
}
host = strchr(target, '%');
if (host) {
*host = '\0';
host++;
}
user = strchr(target, '!');
if (user) {
/* msgto form: nick!user@host */
*user = '******';
user++;
nick = target;
host = server; /* not "@server" but "@host" */
} else {
user = target;
}
for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
if (Client_Type(cl) != CLIENT_USER &&
Client_Type(cl) != CLIENT_SERVICE)
continue;
if (nick != NULL && host != NULL) {
if (strcasecmp(nick, Client_ID(cl)) == 0 &&
strcasecmp(user, Client_User(cl)) == 0 &&
strcasecmp(host, Client_HostnameDisplayed(cl)) == 0)
break;
else
continue;
}
if (strcasecmp(user, Client_User(cl)) != 0)
continue;
if (host != NULL && strcasecmp(host,
Client_HostnameDisplayed(cl)) != 0)
continue;
if (server != NULL && strcasecmp(server,
Client_ID(Client_Introducer(cl))) != 0)
continue;
break;
}
}
if (cl) {
/* Target is a user, enforce type */
#ifndef STRICT_RFC
if (Client_Type(cl) != ForceType &&
!(ForceType == CLIENT_USER &&
(Client_Type(cl) == CLIENT_USER ||
Client_Type(cl) == CLIENT_SERVICE))) {
#else
if (Client_Type(cl) != ForceType) {
#endif
if (SendErrors && !IRC_WriteErrClient(
from, ERR_NOSUCHNICK_MSG,Client_ID(from),
currentTarget))
return DISCONNECTED;
goto send_next_target;
}
#ifndef STRICT_RFC
if (ForceType == CLIENT_SERVICE &&
(Conn_Options(Client_Conn(Client_NextHop(cl)))
& CONN_RFC1459)) {
/* SQUERY command but RFC 1459 link: convert
* request to PRIVMSG command */
Req->command = "PRIVMSG";
}
#endif
if (Client_HasMode(cl, 'b') &&
!Client_HasMode(from, 'R') &&
!Client_HasMode(from, 'o') &&
!(Client_Type(from) == CLIENT_SERVER) &&
!(Client_Type(from) == CLIENT_SERVICE)) {
if (SendErrors && !IRC_WriteErrClient(from,
ERR_NONONREG_MSG,
Client_ID(from), Client_ID(cl)))
return DISCONNECTED;
goto send_next_target;
}
if (Client_HasMode(cl, 'C')) {
cl2chan = Channel_FirstChannelOf(cl);
while (cl2chan) {
chan = Channel_GetChannel(cl2chan);
if (Channel_IsMemberOf(chan, from))
break;
cl2chan = Channel_NextChannelOf(cl, cl2chan);
}
if (!cl2chan) {
if (SendErrors && !IRC_WriteErrClient(
from, ERR_NOTONSAMECHANNEL_MSG,
Client_ID(from), Client_ID(cl)))
return DISCONNECTED;
goto send_next_target;
}
}
if (SendErrors && (Client_Type(Client) != CLIENT_SERVER)
&& Client_HasMode(cl, 'a')) {
/* Target is away */
if (!IRC_WriteStrClient(from, RPL_AWAY_MSG,
Client_ID(from),
Client_ID(cl),
Client_Away(cl)))
return DISCONNECTED;
}
if (Client_Conn(from) > NONE) {
Conn_UpdateIdle(Client_Conn(from));
}
if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
Req->command, Client_ID(cl),
message))
return DISCONNECTED;
} else if (ForceType != CLIENT_SERVICE
&& (chan = Channel_Search(currentTarget))) {
if (!Channel_Write(chan, from, Client, Req->command,
SendErrors, message))
return DISCONNECTED;
} else if (ForceType != CLIENT_SERVICE
/* $#: server/target mask, RFC 2812, sec. 3.3.1 */
&& strchr("$#", currentTarget[0])
&& strchr(currentTarget, '.')) {
/* targetmask */
if (!Send_Message_Mask(from, Req->command, currentTarget,
message, SendErrors))
return DISCONNECTED;
} else {
if (!SendErrors)
return CONNECTED;
if (!IRC_WriteErrClient(from, ERR_NOSUCHNICK_MSG,
Client_ID(from), currentTarget))
return DISCONNECTED;
}
send_next_target:
currentTarget = strtok_r(NULL, ",", &lastCurrentTarget);
if (currentTarget)
Conn_SetPenalty(Client_Conn(Client), 1);
}
return CONNECTED;
} /* Send_Message */
static bool
Send_Message_Mask(CLIENT * from, char * command, char * targetMask,
char * message, bool SendErrors)
{
CLIENT *cl;
bool client_match;
char *mask = targetMask + 1;
const char *check_wildcards;
cl = NULL;
if (!Client_HasMode(from, 'o')) {
if (!SendErrors)
return true;
return IRC_WriteErrClient(from, ERR_NOPRIVILEGES_MSG,
Client_ID(from));
}
/*
* RFC 2812, sec. 3.3.1 requires that targetMask have at least one
* dot (".") and no wildcards ("*", "?") following the last one.
*/
check_wildcards = strrchr(targetMask, '.');
assert(check_wildcards != NULL);
if (check_wildcards &&
check_wildcards[strcspn(check_wildcards, "*?")])
{
if (!SendErrors)
return true;
return IRC_WriteErrClient(from, ERR_WILDTOPLEVEL, targetMask);
}
/* #: hostmask, see RFC 2812, sec. 3.3.1 */
if (targetMask[0] == '#') {
for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
if (Client_Type(cl) != CLIENT_USER)
continue;
client_match = MatchCaseInsensitive(mask, Client_Hostname(cl));
if (client_match)
if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
command, Client_ID(cl), message))
return false;
}
} else {
assert(targetMask[0] == '$'); /* $: server mask, see RFC 2812, sec. 3.3.1 */
for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
if (Client_Type(cl) != CLIENT_USER)
continue;
client_match = MatchCaseInsensitive(mask,
Client_ID(Client_Introducer(cl)));
if (client_match)
if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
command, Client_ID(cl), message))
return false;
}
}
return CONNECTED;
} /* Send_Message_Mask */
/*
* Handler for the IRC "TRACE" 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_TRACE(CLIENT *Client, REQUEST *Req)
{
CLIENT *from, *target, *c;
CONN_ID idx, idx2;
char user[CLIENT_USER_LEN];
assert(Client != NULL);
assert(Req != NULL);
IRC_SetPenalty(Client, 3);
_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
_IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from)
/* Forward command to other server? */
if (target != Client_ThisServer()) {
/* Send RPL_TRACELINK back to initiator */
idx = Client_Conn(Client);
assert(idx > NONE);
idx2 = Client_Conn(Client_NextHop(target));
assert(idx2 > NONE);
if (!IRC_WriteStrClient(from, RPL_TRACELINK_MSG,
Client_ID(from), PACKAGE_NAME,
PACKAGE_VERSION, Client_ID(target),
Client_ID(Client_NextHop(target)),
Option_String(idx2),
time(NULL) - Conn_StartTime(idx2),
Conn_SendQ(idx), Conn_SendQ(idx2)))
return DISCONNECTED;
/* Forward command */
IRC_WriteStrClientPrefix(target, from, "TRACE %s", Req->argv[0]);
return CONNECTED;
}
/* Infos about all connected servers */
c = Client_First();
while (c) {
if (Client_Conn(c) > NONE) {
/* Local client */
if (Client_Type(c) == CLIENT_SERVER) {
/* Server link */
strlcpy(user, Client_User(c), sizeof(user));
if (user[0] == '~')
strlcpy(user, "unknown", sizeof(user));
if (!IRC_WriteStrClient(from,
RPL_TRACESERVER_MSG,
Client_ID(from), Client_ID(c),
user, Client_Hostname(c),
Client_Mask(Client_ThisServer()),
Option_String(Client_Conn(c))))
return DISCONNECTED;
}
if (Client_Type(c) == CLIENT_USER
&& Client_HasMode(c, 'o')) {
/* IRC Operator */
if (!IRC_WriteStrClient(from,
RPL_TRACEOPERATOR_MSG,
Client_ID(from), Client_ID(c)))
return DISCONNECTED;
}
}
c = Client_Next( c );
}
return IRC_WriteStrClient(from, RPL_TRACEEND_MSG, Client_ID(from),
Conf_ServerName, PACKAGE_NAME,
PACKAGE_VERSION, NGIRCd_DebugLevel);
} /* IRC_TRACE */
/**
* 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 */
