/*
* ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2010 Alexander Barton (alex@barton.de)
*
* 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
* Please read the file COPYING, README and AUTHORS for more information.
*/
-
#include "portab.h"
-static char UNUSED id[] = "$Id: parse.c,v 1.72 2008/02/17 13:26:42 alex Exp $";
-
/**
* @file
* IRC command parser and validator.
{
{ "ADMIN", IRC_ADMIN, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
{ "AWAY", IRC_AWAY, CLIENT_USER, 0, 0, 0 },
- { "CONNECT", IRC_CONNECT, CLIENT_USER, 0, 0, 0 },
+ { "CONNECT", IRC_CONNECT, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
{ "DIE", IRC_DIE, CLIENT_USER, 0, 0, 0 },
{ "DISCONNECT", IRC_DISCONNECT, CLIENT_USER, 0, 0, 0 },
{ "ERROR", IRC_ERROR, 0xFFFF, 0, 0, 0 },
{ "SERVICE", IRC_SERVICE, 0xFFFF, 0, 0, 0 },
{ "SERVLIST", IRC_SERVLIST, CLIENT_USER, 0, 0, 0 },
{ "SQUERY", IRC_SQUERY, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "SQUIT", IRC_SQUIT, CLIENT_SERVER, 0, 0, 0 },
+ { "SQUIT", IRC_SQUIT, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
{ "STATS", IRC_STATS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
{ "SUMMON", IRC_SUMMON, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
{ "TIME", IRC_TIME, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
{ "USERS", IRC_USERS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
{ "VERSION", IRC_VERSION, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
{ "WALLOPS", IRC_WALLOPS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
+ { "WEBIRC", IRC_WEBIRC, CLIENT_UNKNOWN, 0, 0, 0 },
{ "WHO", IRC_WHO, CLIENT_USER, 0, 0, 0 },
{ "WHOIS", IRC_WHOIS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
{ "WHOWAS", IRC_WHOWAS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
Init_Request( &req );
- /* Fuehrendes und folgendes "Geraffel" verwerfen */
+ /* remove leading & trailing whitespace */
ngt_TrimStr( Request );
- /* gibt es ein Prefix? */
if( Request[0] == ':' )
{
- /* Prefix vorhanden */
+ /* Prefix */
req.prefix = Request + 1;
ptr = strchr( Request, ' ' );
if( ! ptr )
{
- Log( LOG_DEBUG, "Connection %d: Parse error: prefix without command!?", Idx );
+ LogDebug("Connection %d: Parse error: prefix without command!?", Idx);
return Conn_WriteStr( Idx, "ERROR :Prefix without command!?" );
}
*ptr = '\0';
#ifndef STRICT_RFC
- /* multiple Leerzeichen als Trenner zwischen
- * Prefix und Befehl ignorieren */
+ /* ignore multiple spaces between prefix and command */
while( *(ptr + 1) == ' ' ) ptr++;
#endif
start = ptr + 1;
}
else start = Request;
- /* Befehl */
ptr = strchr( start, ' ' );
if( ptr )
{
*ptr = '\0';
#ifndef STRICT_RFC
- /* multiple Leerzeichen als Trenner vor
- * Parametern ignorieren */
+ /* ignore multiple spaces between parameters */
while( *(ptr + 1) == ' ' ) ptr++;
#endif
}
req.command = start;
- /* Argumente, Parameter */
+ /* Arguments, Parameters */
if( ptr )
{
- /* Prinzipiell gibt es welche :-) */
start = ptr + 1;
while( start )
{
- /* Parameter-String "zerlegen" */
if( start[0] == ':' )
{
req.argv[req.argc] = start + 1;
{
*ptr = '\0';
#ifndef STRICT_RFC
- /* multiple Leerzeichen als
- * Parametertrenner ignorieren */
while( *(ptr + 1) == ' ' ) ptr++;
#endif
}
}
}
- /* Daten validieren */
if( ! Validate_Prefix( Idx, &req, &closed )) return ! closed;
if( ! Validate_Command( Idx, &req, &closed )) return ! closed;
if( ! Validate_Args( Idx, &req, &closed )) return ! closed;
*Closed = false;
- /* ist ueberhaupt ein Prefix vorhanden? */
if( ! Req->prefix ) return true;
- /* Client-Struktur der Connection ermitteln */
client = Conn_GetClient( Idx );
assert( client != NULL );
- /* nur validieren, wenn bereits registrierte Verbindung */
+ /* only validate if this connection is already registered */
if(( Client_Type( client ) != CLIENT_USER ) && ( Client_Type( client ) != CLIENT_SERVER ) && ( Client_Type( client ) != CLIENT_SERVICE ))
{
- /* noch nicht registrierte Verbindung.
- * Das Prefix wird ignoriert. */
+ /* not registered, ignore prefix */
Req->prefix = NULL;
return true;
}
- /* pruefen, ob der im Prefix angegebene Client bekannt ist */
+ /* check if client in prefix is known */
c = Client_Search( Req->prefix );
if( ! c )
{
- /* im Prefix angegebener Client ist nicht bekannt */
Log( LOG_ERR, "Invalid prefix \"%s\", client not known (connection %d, command %s)!?", Req->prefix, Idx, Req->command );
if( ! Conn_WriteStr( Idx, "ERROR :Invalid prefix \"%s\", client not known!?", Req->prefix )) *Closed = true;
return false;
}
- /* pruefen, ob der Client mit dem angegebenen Prefix in Richtung
- * des Senders liegt, d.h. sicherstellen, dass das Prefix nicht
- * gefaelscht ist */
+ /* check if the client named in the prefix is expected
+ * to come from that direction */
if( Client_NextHop( c ) != client )
{
- /* das angegebene Prefix ist aus dieser Richtung, also
- * aus der gegebenen Connection, ungueltig! */
Log( LOG_ERR, "Spoofed prefix \"%s\" from \"%s\" (connection %d, command %s)!", Req->prefix, Client_Mask( Conn_GetClient( Idx )), Idx, Req->command );
Conn_Close( Idx, NULL, "Spoofed prefix", true);
*Closed = true;
static bool
-Validate_Args( UNUSED CONN_ID Idx, UNUSED REQUEST *Req, bool *Closed )
+#ifdef STRICT_RFC
+Validate_Args(CONN_ID Idx, REQUEST *Req, bool *Closed)
+#else
+Validate_Args(UNUSED CONN_ID Idx, UNUSED REQUEST *Req, bool *Closed)
+#endif
{
+#ifdef STRICT_RFC
+ int i;
+#endif
+
+ *Closed = false;
+
+#ifdef STRICT_RFC
assert( Idx >= 0 );
assert( Req != NULL );
- *Closed = false;
+
+ /* CR and LF are never allowed in command parameters.
+ * But since we do accept lines terminated only with CR or LF in
+ * "non-RFC-compliant mode" (besides the correct CR+LF combination),
+ * this check can only trigger in "strict RFC" mode; therefore we
+ * optimize it away otherwise ... */
+ for (i = 0; i < Req->argc; i++) {
+ if (strchr(Req->argv[i], '\r') || strchr(Req->argv[i], '\n')) {
+ Log(LOG_ERR,
+ "Invalid character(s) in parameter (connection %d, command %s)!?",
+ Idx, Req->command);
+ if (!Conn_WriteStr(Idx,
+ "ERROR :Invalid character(s) in parameter!"))
+ *Closed = true;
+ return false;
+ }
+ }
+#endif
return true;
} /* Validate_Args */
Handle_Numeric(CLIENT *client, REQUEST *Req)
{
static const struct _NUMERIC Numerics[] = {
- { 005, IRC_Num_ISUPPORT },
+ { 5, IRC_Num_ISUPPORT },
+ { 20, NULL },
{ 376, IRC_Num_ENDOFMOTD }
};
int i, num;
CLIENT *prefix, *target = NULL;
/* Determine target */
- if (Req->argc > 0)
- target = Client_Search(Req->argv[0]);
+ if (Req->argc > 0) {
+ if (strcmp(Req->argv[0], "*") != 0)
+ target = Client_Search(Req->argv[0]);
+ else
+ target = Client_ThisServer();
+ }
if (!target) {
/* Status code without target!? */
num = atoi(Req->command);
for (i = 0; i < (int) ARRAY_SIZE(Numerics); i++) {
- if (num == Numerics[i].numeric)
+ if (num == Numerics[i].numeric) {
+ if (!Numerics[i].function)
+ return CONNECTED;
return Numerics[i].function(client, Req);
+ }
}
LogDebug("Ignored status code %s from \"%s\".",
static bool
Handle_Request( CONN_ID Idx, REQUEST *Req )
{
- /* Client-Request verarbeiten. Bei einem schwerwiegenden Fehler
- * wird die Verbindung geschlossen und false geliefert. */
CLIENT *client;
bool result = true;
int client_type;
cmd = My_Commands;
while (cmd->name) {
- /* Befehl suchen */
if (strcasecmp(Req->command, cmd->name) != 0) {
cmd++;
continue;
projects / ngircd-alex.git / blobdiff