/*
* ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2014 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.
- *
- * IRC command parser and validator
*/
-
#include "portab.h"
-static char UNUSED id[] = "$Id: parse.c,v 1.55 2002/12/30 17:15:42 alex Exp $";
+/**
+ * @file
+ * IRC command parser and validator.
+ */
-#include "imp.h"
#include <assert.h>
#include <stdlib.h>
-#include <stdio.h>
#include <string.h>
+#include <strings.h>
#include "ngircd.h"
-#include "defines.h"
#include "conn-func.h"
-#include "client.h"
+#include "conf.h"
#include "channel.h"
#include "log.h"
#include "messages.h"
-#include "tool.h"
-#include "exp.h"
#include "parse.h"
-#include "imp.h"
#include "irc.h"
+#include "irc-cap.h"
#include "irc-channel.h"
+#ifdef ICONV
+# include "irc-encoding.h"
+#endif
#include "irc-info.h"
#include "irc-login.h"
+#include "irc-metadata.h"
#include "irc-mode.h"
#include "irc-op.h"
#include "irc-oper.h"
#include "irc-server.h"
#include "irc-write.h"
+#include "numeric.h"
-#include "exp.h"
+struct _NUMERIC {
+ int numeric;
+ bool (*function) PARAMS(( CLIENT *Client, REQUEST *Request ));
+};
-COMMAND My_Commands[] =
+static COMMAND My_Commands[] =
{
- { "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 },
- { "DIE", IRC_DIE, CLIENT_USER, 0, 0, 0 },
- { "ERROR", IRC_ERROR, 0xFFFF, 0, 0, 0 },
- { "INVITE", IRC_INVITE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "ISON", IRC_ISON, CLIENT_USER, 0, 0, 0 },
- { "JOIN", IRC_JOIN, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "KICK", IRC_KICK, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "KILL", IRC_KILL, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "LINKS", IRC_LINKS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "LIST", IRC_LIST, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "LUSERS", IRC_LUSERS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "MODE", IRC_MODE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "MOTD", IRC_MOTD, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "NAMES", IRC_NAMES, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "NICK", IRC_NICK, 0xFFFF, 0, 0, 0 },
- { "NJOIN", IRC_NJOIN, CLIENT_SERVER, 0, 0, 0 },
- { "NOTICE", IRC_NOTICE, 0xFFFF, 0, 0, 0 },
- { "OPER", IRC_OPER, CLIENT_USER, 0, 0, 0 },
- { "PART", IRC_PART, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "PASS", IRC_PASS, 0xFFFF, 0, 0, 0 },
- { "PING", IRC_PING, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "PONG", IRC_PONG, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "PRIVMSG", IRC_PRIVMSG, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "QUIT", IRC_QUIT, 0xFFFF, 0, 0, 0 },
- { "REHASH", IRC_REHASH, CLIENT_USER, 0, 0, 0 },
- { "RESTART", IRC_RESTART, CLIENT_USER, 0, 0, 0 },
- { "SERVER", IRC_SERVER, 0xFFFF, 0, 0, 0 },
- { "SQUIT", IRC_SQUIT, CLIENT_SERVER, 0, 0, 0 },
- { "STATS", IRC_STATS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "TIME", IRC_TIME, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "TOPIC", IRC_TOPIC, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
- { "USER", IRC_USER, 0xFFFF, 0, 0, 0 },
- { "USERHOST", IRC_USERHOST, CLIENT_USER, 0, 0, 0 },
- { "VERSION", IRC_VERSION, CLIENT_USER|CLIENT_SERVER, 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 },
+#define _CMD(name, func, type, min, max, penalty) \
+ { (name), (func), (type), (min), (max), (penalty), 0, 0, 0 }
+ _CMD("ADMIN", IRC_ADMIN, CLIENT_USER|CLIENT_SERVER, 0, 1, 1),
+ _CMD("AWAY", IRC_AWAY, CLIENT_USER, 0, 1, 0),
+ _CMD("CAP", IRC_CAP, CLIENT_ANY, 1, 2, 0),
+ _CMD("CONNECT", IRC_CONNECT, CLIENT_USER|CLIENT_SERVER, 0, -1, 0),
+#ifdef STRICT_RFC
+ _CMD("DIE", IRC_DIE, CLIENT_USER, 0, 0, 0),
+#else
+ _CMD("DIE", IRC_DIE, CLIENT_USER, 0, 1, 0),
+#endif
+ _CMD("DISCONNECT", IRC_DISCONNECT, CLIENT_USER, 1, 1, 0),
+ _CMD("ERROR", IRC_ERROR, CLIENT_ANY, 0, -1, 0),
+ _CMD("GLINE", IRC_xLINE, CLIENT_USER|CLIENT_SERVER, 0, -1, 0),
+ _CMD("HELP", IRC_HELP, CLIENT_USER, 0, 1, 2),
+ _CMD("INFO", IRC_INFO, CLIENT_USER|CLIENT_SERVER, 0, 1, 2),
+ _CMD("INVITE", IRC_INVITE, CLIENT_USER|CLIENT_SERVER, 2, 2, 1),
+ _CMD("ISON", IRC_ISON, CLIENT_USER, 1, -1, 0),
+ _CMD("JOIN", IRC_JOIN, CLIENT_USER|CLIENT_SERVER, 1, 2, 0),
+ _CMD("KICK", IRC_KICK, CLIENT_USER|CLIENT_SERVER, 2, 3, 0),
+ _CMD("KILL", IRC_KILL, CLIENT_USER|CLIENT_SERVER, 2, 2, 0),
+ _CMD("KLINE", IRC_xLINE, CLIENT_USER|CLIENT_SERVER, 0, -1, 0),
+ _CMD("LINKS", IRC_LINKS, CLIENT_USER|CLIENT_SERVER, 0, 2, 1),
+ _CMD("LIST", IRC_LIST, CLIENT_USER|CLIENT_SERVER, 0, 2, 2),
+ _CMD("LUSERS", IRC_LUSERS, CLIENT_USER|CLIENT_SERVER, 0, 2, 1),
+ _CMD("METADATA", IRC_METADATA, CLIENT_SERVER, 3, 3, 0),
+ _CMD("MODE", IRC_MODE, CLIENT_USER|CLIENT_SERVER, 1, -1, 1),
+ _CMD("MOTD", IRC_MOTD, CLIENT_USER|CLIENT_SERVER, 0, 1, 3),
+ _CMD("NAMES", IRC_NAMES, CLIENT_USER|CLIENT_SERVER, 0, 2, 1),
+ _CMD("NICK", IRC_NICK, CLIENT_ANY, 0, -1, 0),
+ _CMD("NJOIN", IRC_NJOIN, CLIENT_SERVER, 2, 2, 0),
+ _CMD("NOTICE", IRC_NOTICE, CLIENT_ANY, 0, -1, 0),
+ _CMD("OPER", IRC_OPER, CLIENT_USER, 2, 2, 0),
+ _CMD("PART", IRC_PART, CLIENT_USER|CLIENT_SERVER, 1, 2, 0),
+ _CMD("PASS", IRC_PASS, CLIENT_ANY, 0, -1, 0),
+ _CMD("PING", IRC_PING, CLIENT_USER|CLIENT_SERVER, 0, -1, 0),
+ _CMD("PONG", IRC_PONG, CLIENT_ANY, 0, -1, 0),
+ _CMD("PRIVMSG", IRC_PRIVMSG, CLIENT_USER|CLIENT_SERVER, 0, 2, 0),
+ _CMD("QUIT", IRC_QUIT, CLIENT_ANY, 0, 1, 0),
+ _CMD("REHASH", IRC_REHASH, CLIENT_USER, 0, 0, 0),
+ _CMD("RESTART", IRC_RESTART, CLIENT_USER, 0, 0, 0),
+ _CMD("SERVER", IRC_SERVER, CLIENT_ANY, 0, -1, 0),
+ _CMD("SERVICE", IRC_SERVICE, CLIENT_ANY, 6, 6, 0),
+ _CMD("SERVLIST", IRC_SERVLIST, CLIENT_USER, 0, 2, 1),
+ _CMD("SQUERY", IRC_SQUERY, CLIENT_USER|CLIENT_SERVER, 0, 2, 0),
+ _CMD("SQUIT", IRC_SQUIT, CLIENT_USER|CLIENT_SERVER, 2, 2, 0),
+ _CMD("STATS", IRC_STATS, CLIENT_USER|CLIENT_SERVER, 0, 2, 2),
+ _CMD("SVSNICK", IRC_SVSNICK, CLIENT_SERVER, 2, 2, 0),
+ _CMD("SUMMON", IRC_SUMMON, CLIENT_USER|CLIENT_SERVER, 0, -1, 0),
+ _CMD("TIME", IRC_TIME, CLIENT_USER|CLIENT_SERVER, 0, 1, 1),
+ _CMD("TOPIC", IRC_TOPIC, CLIENT_USER|CLIENT_SERVER, 1, 2, 1),
+ _CMD("TRACE", IRC_TRACE, CLIENT_USER|CLIENT_SERVER, 0, 1, 3),
+ _CMD("USER", IRC_USER, CLIENT_ANY, 0, -1, 0),
+ _CMD("USERHOST", IRC_USERHOST, CLIENT_USER, 1, -1, 1),
+ _CMD("USERS", IRC_USERS, CLIENT_USER|CLIENT_SERVER, 0, -1, 0),
+ _CMD("VERSION", IRC_VERSION, CLIENT_USER|CLIENT_SERVER, 0, 1, 1),
+ _CMD("WALLOPS", IRC_WALLOPS, CLIENT_USER|CLIENT_SERVER, 1, 1, 0),
+ _CMD("WEBIRC", IRC_WEBIRC, CLIENT_UNKNOWN, 4, 4, 0),
+ _CMD("WHO", IRC_WHO, CLIENT_USER, 0, 2, 1),
+ _CMD("WHOIS", IRC_WHOIS, CLIENT_USER|CLIENT_SERVER, 0, -1, 1),
+ _CMD("WHOWAS", IRC_WHOWAS, CLIENT_USER|CLIENT_SERVER, 0, -1, 0),
+
#ifdef IRCPLUS
- { "CHANINFO", IRC_CHANINFO, CLIENT_SERVER, 0, 0, 0 },
+ _CMD("CHANINFO", IRC_CHANINFO, CLIENT_SERVER, 0, -1, 0),
+# ifdef ICONV
+ _CMD("CHARCONV", IRC_CHARCONV, CLIENT_USER, 1, 1, 0),
+# endif
#endif
- { NULL, NULL, 0x0, 0, 0, 0 } /* Ende-Marke */
-};
+#ifndef STRICT_RFC
+ _CMD("GET", IRC_QUIT_HTTP, CLIENT_UNKNOWN, 0, -1, 0),
+ _CMD("POST", IRC_QUIT_HTTP, CLIENT_UNKNOWN, 0, -1, 0),
+#endif
+ _CMD(NULL, NULL, 0, 0, 0, 0) /* End-Mark */
+#undef _CMD
+};
-LOCAL VOID Init_Request PARAMS(( REQUEST *Req ));
+static void Init_Request PARAMS(( REQUEST *Req ));
-LOCAL BOOLEAN Validate_Prefix PARAMS(( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed ));
-LOCAL BOOLEAN Validate_Command PARAMS(( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed ));
-LOCAL BOOLEAN Validate_Args PARAMS(( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed ));
+static bool Validate_Prefix PARAMS(( CONN_ID Idx, REQUEST *Req, bool *Closed ));
+static bool Validate_Command PARAMS(( CONN_ID Idx, REQUEST *Req, bool *Closed ));
+static bool Validate_Args PARAMS(( CONN_ID Idx, REQUEST *Req, bool *Closed ));
-LOCAL BOOLEAN Handle_Request PARAMS(( CONN_ID Idx, REQUEST *Req ));
+static bool Handle_Request PARAMS(( CONN_ID Idx, REQUEST *Req ));
+static bool ScrubCTCP PARAMS((char *Request));
+/**
+ * Return the pointer to the global "IRC command structure".
+ * This structure, an array of type "COMMAND" describes all the IRC commands
+ * implemented by ngIRCd and how to handle them.
+ * @return Pointer to the global command structure.
+ */
GLOBAL COMMAND *
-Parse_GetCommandStruct( VOID )
+Parse_GetCommandStruct( void )
{
return My_Commands;
} /* Parse_GetCommandStruct */
-GLOBAL BOOLEAN
-Parse_Request( CONN_ID Idx, CHAR *Request )
+/**
+ * Parse a command ("request") received from a client.
+ *
+ * This function is called after the connection layer received a valid CR+LF
+ * terminated line of text: we assume that this is a valid IRC command and
+ * try to do something useful with it :-)
+ *
+ * All errors are reported to the client from which the command has been
+ * received, and if the error is fatal this connection is closed down.
+ *
+ * This function is able to parse the syntax as described in RFC 2812,
+ * section 2.3.
+ *
+ * @param Idx Index of the connection from which the command has been received.
+ * @param Request NULL terminated line of text (the "command").
+ * @return true on success (valid command or "regular" error), false if a
+ * fatal error occurred and the connection has been shut down.
+ */
+GLOBAL bool
+Parse_Request( CONN_ID Idx, char *Request )
{
- /* Client-Request parsen. Bei einem schwerwiegenden Fehler wird
- * die Verbindung geschlossen und FALSE geliefert.
- * Der Aufbau gueltiger Requests ist in RFC 2812, 2.3 definiert. */
-
REQUEST req;
- CHAR *start, *ptr;
- BOOLEAN closed;
+ char *start, *ptr;
+ bool closed;
assert( Idx >= 0 );
assert( Request != NULL );
Init_Request( &req );
- /* Fuehrendes und folgendes "Geraffel" verwerfen */
+ /* remove leading & trailing whitespace */
ngt_TrimStr( Request );
- /* gibt es ein Prefix? */
- if( Request[0] == ':' )
- {
- /* Prefix vorhanden */
+ if (Conf_ScrubCTCP && ScrubCTCP(Request))
+ return true;
+
+ if (Request[0] == ':') {
+ /* Prefix */
req.prefix = Request + 1;
ptr = strchr( Request, ' ' );
if( ! ptr )
{
- Log( LOG_DEBUG, "Connection %d: Parse error: prefix without command!?", Idx );
- return Conn_WriteStr( Idx, "ERROR :Prefix without command!?" );
+ 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
- *Parametertrennern 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;
} /* Parse_Request */
-LOCAL VOID
+/**
+ * Initialize request structure.
+ * @param Req Request structure to be initialized.
+ */
+static void
Init_Request( REQUEST *Req )
{
- /* Neue Request-Struktur initialisieren */
-
- INT i;
+ int i;
assert( Req != NULL );
} /* Init_Request */
-LOCAL BOOLEAN
-Validate_Prefix( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed )
+static bool
+Validate_Prefix( CONN_ID Idx, REQUEST *Req, bool *Closed )
{
CLIENT *client, *c;
assert( Idx >= 0 );
assert( Req != NULL );
- *Closed = FALSE;
-
- /* ist ueberhaupt ein Prefix vorhanden? */
- if( ! Req->prefix ) return TRUE;
+ *Closed = false;
- /* Client-Struktur der Connection ermitteln */
- client = Client_GetFromConn( Idx );
+ client = Conn_GetClient( Idx );
assert( client != NULL );
- /* nur validieren, wenn bereits registrierte Verbindung */
- if(( Client_Type( client ) != CLIENT_USER ) && ( Client_Type( client ) != CLIENT_SERVER ) && ( Client_Type( client ) != CLIENT_SERVICE ))
+ if (!Req->prefix && Client_Type(client) == CLIENT_SERVER
+ && !(Conn_Options(Idx) & CONN_RFC1459)
+ && strcasecmp(Req->command, "ERROR") != 0
+ && strcasecmp(Req->command, "PING") != 0)
{
- /* noch nicht registrierte Verbindung.
- * Das Prefix wird ignoriert. */
+ Log(LOG_ERR,
+ "Received command without prefix (connection %d, command \"%s\")!?",
+ Idx, Req->command);
+ if (!Conn_WriteStr(Idx, "ERROR :Prefix missing"))
+ *Closed = true;
+ return false;
+ }
+
+ if (!Req->prefix)
+ return true;
+
+ /* only validate if this connection is already registered */
+ if (Client_Type(client) != CLIENT_USER
+ && Client_Type(client) != CLIENT_SERVER
+ && Client_Type(client) != CLIENT_SERVICE) {
+ /* not registered, ignore prefix */
Req->prefix = NULL;
- return TRUE;
+ return true;
}
- /* pruefen, ob der im Prefix angegebene Client bekannt ist */
- 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;
+ /* check if client in prefix is known */
+ c = Client_Search(Req->prefix);
+ if (!c) {
+ if (Client_Type(client) != CLIENT_SERVER) {
+ Log(LOG_ERR,
+ "Ignoring command with invalid prefix \"%s\" from \"%s\" (connection %d, command \"%s\")!",
+ Req->prefix, Client_ID(client), Idx, Req->command);
+ if (!Conn_WriteStr(Idx,
+ "ERROR :Invalid prefix \"%s\"",
+ Req->prefix))
+ *Closed = true;
+ IRC_SetPenalty(client, 2);
+ } else
+ LogDebug("Ignoring command with invalid prefix \"%s\" from \"%s\" (connection %d, command \"%s\")!",
+ Req->prefix, Client_ID(client), Idx, Req->command);
+ return false;
}
- /* pruefen, ob der Client mit dem angegebenen Prefix in Richtung
- * des Senders liegt, d.h. sicherstellen, dass das Prefix nicht
- * gefaelscht ist */
- 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( Client_GetFromConn( Idx )), Idx, Req->command );
- Conn_Close( Idx, NULL, "Spoofed prefix", TRUE );
- *Closed = TRUE;
- return FALSE;
+ /* check if the client named in the prefix is expected
+ * to come from that direction */
+ if (Client_NextHop(c) != client) {
+ if (Client_Type(client) != CLIENT_SERVER) {
+ Log(LOG_ERR,
+ "Spoofed prefix \"%s\" from \"%s\" (connection %d, command \"%s\"), closing connection!",
+ Req->prefix, Client_ID(client), Idx, Req->command);
+ Conn_Close(Idx, NULL, "Spoofed prefix", true);
+ *Closed = true;
+ } else {
+ Log(LOG_WARNING,
+ "Ignoring command with spoofed prefix \"%s\" from \"%s\" (connection %d, command \"%s\")!",
+ Req->prefix, Client_ID(client), Idx, Req->command);
+ }
+ return false;
}
- return TRUE;
+ return true;
} /* Validate_Prefix */
-LOCAL BOOLEAN
-Validate_Command( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed )
+static bool
+Validate_Command( UNUSED CONN_ID Idx, UNUSED REQUEST *Req, bool *Closed )
{
assert( Idx >= 0 );
assert( Req != NULL );
- *Closed = FALSE;
+ *Closed = false;
- return TRUE;
-} /* Validate_Comman */
+ return true;
+} /* Validate_Command */
-LOCAL BOOLEAN
-Validate_Args( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed )
+static bool
+#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;
- return TRUE;
+ /* 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 */
-LOCAL BOOLEAN
-Handle_Request( CONN_ID Idx, REQUEST *Req )
+/* Command is a status code ("numeric") from another server */
+static bool
+Handle_Numeric(CLIENT *client, REQUEST *Req)
{
- /* Client-Request verarbeiten. Bei einem schwerwiegenden Fehler
- * wird die Verbindung geschlossen und FALSE geliefert. */
+ static const struct _NUMERIC Numerics[] = {
+ { 5, IRC_Num_ISUPPORT },
+ { 20, NULL },
+ { 376, IRC_Num_ENDOFMOTD }
+ };
+ int i, num;
+ char str[COMMAND_LEN];
+ CLIENT *prefix, *target = NULL;
+
+ /* Determine target */
+ 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!? */
+ if (Req->argc > 0)
+ Log(LOG_WARNING,
+ "Unknown target for status code %s: \"%s\"",
+ Req->command, Req->argv[0]);
+ else
+ Log(LOG_WARNING,
+ "Unknown target for status code %s!",
+ Req->command);
+ return true;
+ }
+ if (target == Client_ThisServer()) {
+ /* This server is the target of the numeric */
+ num = atoi(Req->command);
+
+ for (i = 0; i < (int) C_ARRAY_SIZE(Numerics); i++) {
+ if (num == Numerics[i].numeric) {
+ if (!Numerics[i].function)
+ return CONNECTED;
+ return Numerics[i].function(client, Req);
+ }
+ }
+
+ LogDebug("Ignored status code %s from \"%s\".",
+ Req->command, Client_ID(client));
+ return true;
+ }
- CLIENT *client, *target, *prefix;
- CHAR str[LINE_LEN];
- BOOLEAN result;
+ /* Determine source */
+ if (! Req->prefix[0]) {
+ /* Oops, no prefix!? */
+ Log(LOG_WARNING, "Got status code %s from \"%s\" without prefix!?",
+ Req->command, Client_ID(client));
+ return true;
+ }
+
+ prefix = Client_Search(Req->prefix);
+ if (! prefix) { /* Oops, unknown prefix!? */
+ Log(LOG_WARNING, "Got status code %s from unknown source: \"%s\"", Req->command, Req->prefix);
+ return true;
+ }
+
+ /* Forward status code */
+ strlcpy(str, Req->command, sizeof(str));
+ for (i = 0; i < Req->argc; i++) {
+ if (i < Req->argc - 1)
+ strlcat(str, " ", sizeof(str));
+ else
+ strlcat(str, " :", sizeof(str));
+ strlcat(str, Req->argv[i], sizeof(str));
+ }
+ return IRC_WriteStrClientPrefix(target, prefix, "%s", str);
+}
+
+static bool
+Handle_Request( CONN_ID Idx, REQUEST *Req )
+{
+ CLIENT *client;
+ bool result = true;
+ int client_type;
COMMAND *cmd;
- INT i;
assert( Idx >= 0 );
assert( Req != NULL );
assert( Req->command != NULL );
- client = Client_GetFromConn( Idx );
+ client = Conn_GetClient( Idx );
assert( client != NULL );
- /* Statuscode, der geforwarded werden muss? */
- if(( strlen( Req->command ) == 3 ) && ( atoi( Req->command ) > 100 ))
- {
- /* Befehl ist ein Statuscode */
+ /* Numeric? */
+ client_type = Client_Type(client);
+ if ((client_type == CLIENT_SERVER ||
+ client_type == CLIENT_UNKNOWNSERVER)
+ && strlen(Req->command) == 3 && atoi(Req->command) > 1)
+ return Handle_Numeric(client, Req);
- /* Zielserver ermitteln */
- if(( Client_Type( client ) == CLIENT_SERVER ) && ( Req->argc > 0 )) target = Client_Search( Req->argv[0] );
- else target = NULL;
- if( ! target )
- {
- if( Req->argc > 0 ) Log( LOG_WARNING, "Unknown target for status code %s: \"%s\"", Req->command, Req->argv[0] );
- else Log( LOG_WARNING, "Unknown target for status code %s!", Req->command );
- return TRUE;
- }
- if( target == Client_ThisServer( ))
- {
- Log( LOG_DEBUG, "Ignored status code %s from \"%s\".", Req->command, Client_ID( client ));
- return TRUE;
- }
-
- /* Quell-Client ermitteln */
- if( ! Req->prefix[0] )
- {
- Log( LOG_WARNING, "Got status code without prefix!?" );
- return TRUE;
- }
- else prefix = Client_Search( Req->prefix );
- if( ! prefix )
- {
- Log( LOG_WARNING, "Got status code from unknown source: \"%s\"", Req->prefix );
- return TRUE;
+ cmd = My_Commands;
+ while (cmd->name) {
+ if (strcasecmp(Req->command, cmd->name) != 0) {
+ cmd++;
+ continue;
}
- /* Statuscode weiterleiten */
- strlcpy( str, Req->command, sizeof( str ));
- for( i = 0; i < Req->argc; i++ )
- {
- if( i < Req->argc - 1 ) strlcat( str, " ", sizeof( str ));
- else strlcat( str, " :", sizeof( str ));
- strlcat( str, Req->argv[i], sizeof( str ));
+ if (!(client_type & cmd->type)) {
+ if (client_type == CLIENT_USER
+ && cmd->type & CLIENT_SERVER)
+ return IRC_WriteErrClient(client,
+ ERR_NOTREGISTEREDSERVER_MSG,
+ Client_ID(client));
+ else
+ return IRC_WriteErrClient(client,
+ ERR_NOTREGISTERED_MSG,
+ Client_ID(client));
}
- return IRC_WriteStrClientPrefix( target, prefix, "%s", str );
- }
- cmd = My_Commands;
- while( cmd->name )
- {
- /* Befehl suchen */
- if( strcasecmp( Req->command, cmd->name ) != 0 )
- {
- cmd++; continue;
- }
+ if (cmd->penalty)
+ IRC_SetPenalty(client, cmd->penalty);
- if( Client_Type( client ) & cmd->type )
- {
- /* Command is allowed for this client: call it and count produced bytes */
- Conn_ResetWCounter( );
- result = (cmd->function)( client, Req );
- cmd->bytes += Conn_WCounter( );
+ if (Req->argc < cmd->min_argc ||
+ (cmd->max_argc != -1 && Req->argc > cmd->max_argc))
+ return IRC_WriteErrClient(client, ERR_NEEDMOREPARAMS_MSG,
+ Client_ID(client), Req->command);
- /* Adjust counters */
- if( Client_Type( client ) != CLIENT_SERVER ) cmd->lcount++;
- else cmd->rcount++;
+ /* Command is allowed for this client: call it and count
+ * generated bytes in output */
+ Conn_ResetWCounter();
+ result = (cmd->function)(client, Req);
+ cmd->bytes += Conn_WCounter();
- return result;
- }
+ /* Adjust counters */
+ if (client_type != CLIENT_SERVER)
+ cmd->lcount++;
else
- {
- /* Befehl ist fuer diesen Client-Typ nicht erlaubt! */
- return IRC_WriteStrClient( client, ERR_NOTREGISTERED_MSG, Client_ID( client ));
- }
+ cmd->rcount++;
+ return result;
}
-
- /* Unbekannter Befehl */
- Log( LOG_DEBUG, "Connection %d: Unknown command \"%s\", %d %s,%s prefix.", Client_Conn( client ), Req->command, Req->argc, Req->argc == 1 ? "parameter" : "parameters", Req->prefix ? "" : " no" );
- if( Client_Type( client ) != CLIENT_SERVER ) return IRC_WriteStrClient( client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( client ), Req->command );
- else return TRUE;
+
+ if (client_type != CLIENT_USER &&
+ client_type != CLIENT_SERVER &&
+ client_type != CLIENT_SERVICE )
+ return true;
+
+ /* Unknown command and registered connection: generate error: */
+ LogDebug("Connection %d: Unknown command \"%s\", %d %s,%s prefix.",
+ Client_Conn( client ), Req->command, Req->argc,
+ Req->argc == 1 ? "parameter" : "parameters",
+ Req->prefix ? "" : " no" );
+
+ if (Client_Type(client) != CLIENT_SERVER)
+ result = IRC_WriteErrClient(client, ERR_UNKNOWNCOMMAND_MSG,
+ Client_ID(client), Req->command);
+
+ return result;
} /* Handle_Request */
+/**
+ * Check if incoming messages contains CTCP commands and should be dropped.
+ *
+ * @param Request NULL terminated incoming command.
+ * @returns true, when the message should be dropped.
+ */
+static bool
+ScrubCTCP(char *Request)
+{
+ static const char me_cmd[] = "ACTION ";
+ static const char ctcp_char = 0x1;
+ bool dropCommand = false;
+ char *ptr = Request;
+ char *ptrEnd = strchr(Request, '\0');
+
+ if (Request[0] == ':' && ptrEnd > ptr)
+ ptr++;
+
+ while (ptr != ptrEnd && *ptr != ':')
+ ptr++;
+
+ if ((ptrEnd - ptr) > 1) {
+ ptr++;
+ if (*ptr == ctcp_char) {
+ dropCommand = true;
+ ptr++;
+ /* allow /me commands */
+ if ((size_t)(ptrEnd - ptr) >= strlen(me_cmd)
+ && !strncmp(ptr, me_cmd, strlen(me_cmd)))
+ dropCommand = false;
+ }
+ }
+ return dropCommand;
+}
+
/* -eof- */
projects / ngircd-alex.git / blobdiff