1 6e07fb41 2001-12-21 alex /*
  2 6e07fb41 2001-12-21 alex  * ngIRCd -- The Next Generation IRC Daemon
  3 b6254bbb 2002-01-02 alex  * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
  4 6e07fb41 2001-12-21 alex  *
  5 490f28ff 2002-12-12 alex  * This program is free software; you can redistribute it and/or modify
  6 490f28ff 2002-12-12 alex  * it under the terms of the GNU General Public License as published by
  7 490f28ff 2002-12-12 alex  * the Free Software Foundation; either version 2 of the License, or
  8 490f28ff 2002-12-12 alex  * (at your option) any later version.
  9 490f28ff 2002-12-12 alex  * Please read the file COPYING, README and AUTHORS for more information.
 10 6e07fb41 2001-12-21 alex  */
 11 6e07fb41 2001-12-21 alex 
 12 6e07fb41 2001-12-21 alex 
 13 ca33cbda 2002-03-12 alex #include "portab.h"
 14 490f28ff 2002-12-12 alex 
 15 45404a16 2005-06-01 alex static char UNUSED id[] = "$Id: parse.c,v 1.62 2005/06/01 21:52:18 alex Exp $";
 16 6e07fb41 2001-12-21 alex 
 17 45404a16 2005-06-01 alex /**
 18 45404a16 2005-06-01 alex  * @file
 19 45404a16 2005-06-01 alex  * IRC command parser and validator.
 20 45404a16 2005-06-01 alex  */
 21 45404a16 2005-06-01 alex 
 22 ca33cbda 2002-03-12 alex #include "imp.h"
 23 6e07fb41 2001-12-21 alex #include <assert.h>
 24 1c8c92af 2002-01-05 alex #include <stdlib.h>
 25 6e07fb41 2001-12-21 alex #include <stdio.h>
 26 6e07fb41 2001-12-21 alex #include <string.h>
 27 57c7e236 2004-01-17 alex #include <strings.h>
 28 6e07fb41 2001-12-21 alex 
 29 d79a7d28 2002-01-18 alex #include "ngircd.h"
 30 ca33cbda 2002-03-12 alex #include "defines.h"
 31 b8d7dcec 2002-12-30 alex #include "conn-func.h"
 32 c2f60abe 2002-05-27 alex #include "client.h"
 33 c2f60abe 2002-05-27 alex #include "channel.h"
 34 c2f60abe 2002-05-27 alex #include "log.h"
 35 c2f60abe 2002-05-27 alex #include "messages.h"
 36 c2f60abe 2002-05-27 alex #include "tool.h"
 37 c2f60abe 2002-05-27 alex 
 38 c2f60abe 2002-05-27 alex #include "exp.h"
 39 c2f60abe 2002-05-27 alex #include "parse.h"
 40 c2f60abe 2002-05-27 alex 
 41 c2f60abe 2002-05-27 alex #include "imp.h"
 42 76c4f066 2001-12-23 alex #include "irc.h"
 43 14aba7c1 2002-03-03 alex #include "irc-channel.h"
 44 0c471b84 2002-11-30 alex #include "irc-info.h"
 45 b56eb4d8 2002-02-27 alex #include "irc-login.h"
 46 b56eb4d8 2002-02-27 alex #include "irc-mode.h"
 47 c2f60abe 2002-05-27 alex #include "irc-op.h"
 48 14aba7c1 2002-03-03 alex #include "irc-oper.h"
 49 14aba7c1 2002-03-03 alex #include "irc-server.h"
 50 b56eb4d8 2002-02-27 alex #include "irc-write.h"
 51 6e07fb41 2001-12-21 alex 
 52 ca33cbda 2002-03-12 alex #include "exp.h"
 53 1e59617d 2002-11-30 alex 
 54 1e59617d 2002-11-30 alex 
 55 1e59617d 2002-11-30 alex COMMAND My_Commands[] =
 56 1e59617d 2002-11-30 alex {
 57 17f7c6d3 2002-12-18 alex 	{ "ADMIN", IRC_ADMIN, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 58 17f7c6d3 2002-12-18 alex 	{ "AWAY", IRC_AWAY, CLIENT_USER, 0, 0, 0 },
 59 17f7c6d3 2002-12-18 alex 	{ "CONNECT", IRC_CONNECT, CLIENT_USER, 0, 0, 0 },
 60 17f7c6d3 2002-12-18 alex 	{ "DIE", IRC_DIE, CLIENT_USER, 0, 0, 0 },
 61 a7956f33 2002-12-31 alex 	{ "DISCONNECT", IRC_DISCONNECT, CLIENT_USER, 0, 0, 0 },
 62 17f7c6d3 2002-12-18 alex 	{ "ERROR", IRC_ERROR, 0xFFFF, 0, 0, 0 },
 63 2152e377 2003-01-15 alex 	{ "HELP", IRC_HELP, CLIENT_USER, 0, 0, 0 },
 64 17f7c6d3 2002-12-18 alex 	{ "INVITE", IRC_INVITE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 65 17f7c6d3 2002-12-18 alex 	{ "ISON", IRC_ISON, CLIENT_USER, 0, 0, 0 },
 66 17f7c6d3 2002-12-18 alex 	{ "JOIN", IRC_JOIN, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 67 17f7c6d3 2002-12-18 alex 	{ "KICK", IRC_KICK, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 68 17f7c6d3 2002-12-18 alex 	{ "KILL", IRC_KILL, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 69 17f7c6d3 2002-12-18 alex 	{ "LINKS", IRC_LINKS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 70 17f7c6d3 2002-12-18 alex 	{ "LIST", IRC_LIST, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 71 17f7c6d3 2002-12-18 alex 	{ "LUSERS", IRC_LUSERS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 72 17f7c6d3 2002-12-18 alex 	{ "MODE", IRC_MODE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 73 17f7c6d3 2002-12-18 alex 	{ "MOTD", IRC_MOTD, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 74 17f7c6d3 2002-12-18 alex 	{ "NAMES", IRC_NAMES, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 75 17f7c6d3 2002-12-18 alex 	{ "NICK", IRC_NICK, 0xFFFF, 0, 0, 0 },
 76 17f7c6d3 2002-12-18 alex 	{ "NJOIN", IRC_NJOIN, CLIENT_SERVER, 0, 0, 0 },
 77 17f7c6d3 2002-12-18 alex 	{ "NOTICE", IRC_NOTICE, 0xFFFF, 0, 0, 0 },
 78 17f7c6d3 2002-12-18 alex 	{ "OPER", IRC_OPER, CLIENT_USER, 0, 0, 0 },
 79 17f7c6d3 2002-12-18 alex 	{ "PART", IRC_PART, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 80 17f7c6d3 2002-12-18 alex 	{ "PASS", IRC_PASS, 0xFFFF, 0, 0, 0 },
 81 17f7c6d3 2002-12-18 alex 	{ "PING", IRC_PING, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 82 17f7c6d3 2002-12-18 alex 	{ "PONG", IRC_PONG, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 83 17f7c6d3 2002-12-18 alex 	{ "PRIVMSG", IRC_PRIVMSG, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 84 17f7c6d3 2002-12-18 alex 	{ "QUIT", IRC_QUIT, 0xFFFF, 0, 0, 0 },
 85 17f7c6d3 2002-12-18 alex 	{ "REHASH", IRC_REHASH, CLIENT_USER, 0, 0, 0 },
 86 17f7c6d3 2002-12-18 alex 	{ "RESTART", IRC_RESTART, CLIENT_USER, 0, 0, 0 },
 87 17f7c6d3 2002-12-18 alex 	{ "SERVER", IRC_SERVER, 0xFFFF, 0, 0, 0 },
 88 17f7c6d3 2002-12-18 alex 	{ "SQUIT", IRC_SQUIT, CLIENT_SERVER, 0, 0, 0 },
 89 17f7c6d3 2002-12-18 alex 	{ "STATS", IRC_STATS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 90 17f7c6d3 2002-12-18 alex 	{ "TIME", IRC_TIME, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 91 17f7c6d3 2002-12-18 alex 	{ "TOPIC", IRC_TOPIC, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 92 42c4e6c7 2003-01-13 alex 	{ "TRACE", IRC_TRACE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 93 17f7c6d3 2002-12-18 alex 	{ "USER", IRC_USER, 0xFFFF, 0, 0, 0 },
 94 17f7c6d3 2002-12-18 alex 	{ "USERHOST", IRC_USERHOST, CLIENT_USER, 0, 0, 0 },
 95 17f7c6d3 2002-12-18 alex 	{ "VERSION", IRC_VERSION, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 96 17f7c6d3 2002-12-18 alex 	{ "WHO", IRC_WHO, CLIENT_USER, 0, 0, 0 },
 97 17f7c6d3 2002-12-18 alex 	{ "WHOIS", IRC_WHOIS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 98 17f7c6d3 2002-12-18 alex 	{ "WHOWAS", IRC_WHOWAS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 },
 99 17f7c6d3 2002-12-18 alex #ifdef IRCPLUS
100 17f7c6d3 2002-12-18 alex 	{ "CHANINFO", IRC_CHANINFO, CLIENT_SERVER, 0, 0, 0 },
101 1e59617d 2002-11-30 alex #endif
102 17f7c6d3 2002-12-18 alex 	{ NULL, NULL, 0x0, 0, 0, 0 } /* Ende-Marke */
103 1e59617d 2002-11-30 alex };
104 6e07fb41 2001-12-21 alex 
105 6e07fb41 2001-12-21 alex 
106 8adff592 2005-03-19 fw LOCAL void Init_Request PARAMS(( REQUEST *Req ));
107 6e07fb41 2001-12-21 alex 
108 8adff592 2005-03-19 fw LOCAL bool Validate_Prefix PARAMS(( CONN_ID Idx, REQUEST *Req, bool *Closed ));
109 8adff592 2005-03-19 fw LOCAL bool Validate_Command PARAMS(( CONN_ID Idx, REQUEST *Req, bool *Closed ));
110 8adff592 2005-03-19 fw LOCAL bool Validate_Args PARAMS(( CONN_ID Idx, REQUEST *Req, bool *Closed ));
111 6e07fb41 2001-12-21 alex 
112 8adff592 2005-03-19 fw LOCAL bool Handle_Request PARAMS(( CONN_ID Idx, REQUEST *Req ));
113 6e07fb41 2001-12-21 alex 
114 6e07fb41 2001-12-21 alex 
115 45404a16 2005-06-01 alex /**
116 45404a16 2005-06-01 alex  * Return the pointer to the global "IRC command structure".
117 45404a16 2005-06-01 alex  * This structure, an array of type "COMMAND" describes all the IRC commands
118 45404a16 2005-06-01 alex  * implemented by ngIRCd and how to handle them.
119 45404a16 2005-06-01 alex  * @return Pointer to the global command structure.
120 45404a16 2005-06-01 alex  */
121 17f7c6d3 2002-12-18 alex GLOBAL COMMAND *
122 8adff592 2005-03-19 fw Parse_GetCommandStruct( void )
123 17f7c6d3 2002-12-18 alex {
124 17f7c6d3 2002-12-18 alex 	return My_Commands;
125 17f7c6d3 2002-12-18 alex } /* Parse_GetCommandStruct */
126 17f7c6d3 2002-12-18 alex 
127 17f7c6d3 2002-12-18 alex 
128 45404a16 2005-06-01 alex /**
129 45404a16 2005-06-01 alex  * Parse a command ("request") received from a client.
130 45404a16 2005-06-01 alex  * 
131 45404a16 2005-06-01 alex  * This function is called after the connection layer received a valid CR+LF
132 45404a16 2005-06-01 alex  * terminated line of text: we asume that this is a valid IRC command and
133 45404a16 2005-06-01 alex  * try to do something useful with it :-)
134 45404a16 2005-06-01 alex  *
135 45404a16 2005-06-01 alex  * All errors are reported to the client from which the command has been
136 45404a16 2005-06-01 alex  * received, and if the error is fatal this connection is closed down.
137 45404a16 2005-06-01 alex  *
138 45404a16 2005-06-01 alex  * This function is able to parse the syntax as described in RFC 2812,
139 45404a16 2005-06-01 alex  * section 2.3.
140 45404a16 2005-06-01 alex  *
141 45404a16 2005-06-01 alex  * @param Idx Index of the connection from which the command has been received.
142 45404a16 2005-06-01 alex  * @param Request NULL terminated line of text (the "command").
143 45404a16 2005-06-01 alex  * @return true on success (valid command or "regular" error), false if a
144 45404a16 2005-06-01 alex  * 	fatal error occured and the connection has been shut down.
145 45404a16 2005-06-01 alex  */
146 8adff592 2005-03-19 fw GLOBAL bool
147 8adff592 2005-03-19 fw Parse_Request( CONN_ID Idx, char *Request )
148 6e07fb41 2001-12-21 alex {
149 6e07fb41 2001-12-21 alex 	REQUEST req;
150 8adff592 2005-03-19 fw 	char *start, *ptr;
151 8adff592 2005-03-19 fw 	bool closed;
152 6e07fb41 2001-12-21 alex 
153 6e07fb41 2001-12-21 alex 	assert( Idx >= 0 );
154 6e07fb41 2001-12-21 alex 	assert( Request != NULL );
155 76c4f066 2001-12-23 alex 
156 d4a60bd4 2001-12-25 alex #ifdef SNIFFER
157 d79a7d28 2002-01-18 alex 	if( NGIRCd_Sniffer ) Log( LOG_DEBUG, " <- connection %d: '%s'.", Idx, Request );
158 76c4f066 2001-12-23 alex #endif
159 e0ed3aa1 2002-07-26 alex 
160 6e07fb41 2001-12-21 alex 	Init_Request( &req );
161 6e07fb41 2001-12-21 alex 
162 363a03b8 2001-12-29 alex 	/* Fuehrendes und folgendes "Geraffel" verwerfen */
163 363a03b8 2001-12-29 alex 	ngt_TrimStr( Request );
164 363a03b8 2001-12-29 alex 
165 6e07fb41 2001-12-21 alex 	/* gibt es ein Prefix? */
166 6e07fb41 2001-12-21 alex 	if( Request[0] == ':' )
167 6e07fb41 2001-12-21 alex 	{
168 6e07fb41 2001-12-21 alex 		/* Prefix vorhanden */
169 6e07fb41 2001-12-21 alex 		req.prefix = Request + 1;
170 6e07fb41 2001-12-21 alex 		ptr = strchr( Request, ' ' );
171 e0ed3aa1 2002-07-26 alex 		if( ! ptr )
172 e0ed3aa1 2002-07-26 alex 		{
173 e0ed3aa1 2002-07-26 alex 			Log( LOG_DEBUG, "Connection %d: Parse error: prefix without command!?", Idx );
174 e0ed3aa1 2002-07-26 alex 			return Conn_WriteStr( Idx, "ERROR :Prefix without command!?" );
175 e0ed3aa1 2002-07-26 alex 		}
176 6e07fb41 2001-12-21 alex 		*ptr = '\0';
177 3543c222 2002-01-09 alex #ifndef STRICT_RFC
178 3543c222 2002-01-09 alex 		/* multiple Leerzeichen als Trenner zwischen
179 3543c222 2002-01-09 alex 		 * Prefix und Befehl ignorieren */
180 3543c222 2002-01-09 alex 		while( *(ptr + 1) == ' ' ) ptr++;
181 3543c222 2002-01-09 alex #endif
182 6e07fb41 2001-12-21 alex 		start = ptr + 1;
183 6e07fb41 2001-12-21 alex 	}
184 6e07fb41 2001-12-21 alex 	else start = Request;
185 6e07fb41 2001-12-21 alex 
186 6e07fb41 2001-12-21 alex 	/* Befehl */
187 6e07fb41 2001-12-21 alex 	ptr = strchr( start, ' ' );
188 3543c222 2002-01-09 alex 	if( ptr )
189 3543c222 2002-01-09 alex 	{
190 3543c222 2002-01-09 alex 		*ptr = '\0';
191 3543c222 2002-01-09 alex #ifndef STRICT_RFC
192 3543c222 2002-01-09 alex 		/* multiple Leerzeichen als Trenner vor
193 fc1118cb 2003-01-12 alex 		 * Parametern ignorieren */
194 3543c222 2002-01-09 alex 		while( *(ptr + 1) == ' ' ) ptr++;
195 3543c222 2002-01-09 alex #endif
196 3543c222 2002-01-09 alex 	}
197 6e07fb41 2001-12-21 alex 	req.command = start;
198 6e07fb41 2001-12-21 alex 
199 6e07fb41 2001-12-21 alex 	/* Argumente, Parameter */
200 6e07fb41 2001-12-21 alex 	if( ptr )
201 6e07fb41 2001-12-21 alex 	{
202 6e07fb41 2001-12-21 alex 		/* Prinzipiell gibt es welche :-) */
203 6e07fb41 2001-12-21 alex 		start = ptr + 1;
204 6e07fb41 2001-12-21 alex 		while( start )
205 6e07fb41 2001-12-21 alex 		{
206 6e07fb41 2001-12-21 alex 			/* Parameter-String "zerlegen" */
207 76c4f066 2001-12-23 alex 			if( start[0] == ':' )
208 76c4f066 2001-12-23 alex 			{
209 76c4f066 2001-12-23 alex 				req.argv[req.argc] = start + 1;
210 76c4f066 2001-12-23 alex 				ptr = NULL;
211 76c4f066 2001-12-23 alex 			}
212 76c4f066 2001-12-23 alex 			else
213 76c4f066 2001-12-23 alex 			{
214 76c4f066 2001-12-23 alex 				req.argv[req.argc] = start;
215 76c4f066 2001-12-23 alex 				ptr = strchr( start, ' ' );
216 3543c222 2002-01-09 alex 				if( ptr )
217 3543c222 2002-01-09 alex 				{
218 3543c222 2002-01-09 alex 					*ptr = '\0';
219 3543c222 2002-01-09 alex #ifndef STRICT_RFC
220 3543c222 2002-01-09 alex 					/* multiple Leerzeichen als
221 3543c222 2002-01-09 alex 					 * Parametertrenner ignorieren */
222 3543c222 2002-01-09 alex 					while( *(ptr + 1) == ' ' ) ptr++;
223 3543c222 2002-01-09 alex #endif
224 3543c222 2002-01-09 alex 				}
225 76c4f066 2001-12-23 alex 			}
226 e0ed3aa1 2002-07-26 alex 
227 6e07fb41 2001-12-21 alex 			req.argc++;
228 6e07fb41 2001-12-21 alex 
229 6e07fb41 2001-12-21 alex 			if( start[0] == ':' ) break;
230 6e07fb41 2001-12-21 alex 			if( req.argc > 14 ) break;
231 e0ed3aa1 2002-07-26 alex 
232 6e07fb41 2001-12-21 alex 			if( ptr ) start = ptr + 1;
233 6e07fb41 2001-12-21 alex 			else start = NULL;
234 6e07fb41 2001-12-21 alex 		}
235 6e07fb41 2001-12-21 alex 	}
236 93aa0dbf 2002-01-03 alex 
237 b0b797b3 2002-11-28 alex 	/* Daten validieren */
238 b0b797b3 2002-11-28 alex 	if( ! Validate_Prefix( Idx, &req, &closed )) return ! closed;
239 b0b797b3 2002-11-28 alex 	if( ! Validate_Command( Idx, &req, &closed )) return ! closed;
240 e0ed3aa1 2002-07-26 alex 	if( ! Validate_Args( Idx, &req, &closed )) return ! closed;
241 e0ed3aa1 2002-07-26 alex 
242 6e07fb41 2001-12-21 alex 	return Handle_Request( Idx, &req );
243 6e07fb41 2001-12-21 alex } /* Parse_Request */
244 6e07fb41 2001-12-21 alex 
245 6e07fb41 2001-12-21 alex 
246 45404a16 2005-06-01 alex /**
247 45404a16 2005-06-01 alex  * Initialize request structure.
248 45404a16 2005-06-01 alex  * @param Req Request structure to be initialized.
249 45404a16 2005-06-01 alex  */
250 8adff592 2005-03-19 fw LOCAL void
251 c2f60abe 2002-05-27 alex Init_Request( REQUEST *Req )
252 6e07fb41 2001-12-21 alex {
253 6e07fb41 2001-12-21 alex 	/* Neue Request-Struktur initialisieren */
254 6e07fb41 2001-12-21 alex 
255 8adff592 2005-03-19 fw 	int i;
256 e0ed3aa1 2002-07-26 alex 
257 6e07fb41 2001-12-21 alex 	assert( Req != NULL );
258 6e07fb41 2001-12-21 alex 
259 6e07fb41 2001-12-21 alex 	Req->prefix = NULL;
260 6e07fb41 2001-12-21 alex 	Req->command = NULL;
261 6e07fb41 2001-12-21 alex 	for( i = 0; i < 15; Req->argv[i++] = NULL );
262 6e07fb41 2001-12-21 alex 	Req->argc = 0;
263 6e07fb41 2001-12-21 alex } /* Init_Request */
264 6e07fb41 2001-12-21 alex 
265 6e07fb41 2001-12-21 alex 
266 8adff592 2005-03-19 fw LOCAL bool
267 8adff592 2005-03-19 fw Validate_Prefix( CONN_ID Idx, REQUEST *Req, bool *Closed )
268 6e07fb41 2001-12-21 alex {
269 5063de59 2002-07-29 alex 	CLIENT *client, *c;
270 6e07fb41 2001-12-21 alex 
271 e0ed3aa1 2002-07-26 alex 	assert( Idx >= 0 );
272 e0ed3aa1 2002-07-26 alex 	assert( Req != NULL );
273 6e07fb41 2001-12-21 alex 
274 8adff592 2005-03-19 fw 	*Closed = false;
275 5063de59 2002-07-29 alex 
276 e0ed3aa1 2002-07-26 alex 	/* ist ueberhaupt ein Prefix vorhanden? */
277 8adff592 2005-03-19 fw 	if( ! Req->prefix ) return true;
278 6e07fb41 2001-12-21 alex 
279 5063de59 2002-07-29 alex 	/* Client-Struktur der Connection ermitteln */
280 5063de59 2002-07-29 alex 	client = Client_GetFromConn( Idx );
281 5063de59 2002-07-29 alex 	assert( client != NULL );
282 5063de59 2002-07-29 alex 
283 5063de59 2002-07-29 alex 	/* nur validieren, wenn bereits registrierte Verbindung */
284 5063de59 2002-07-29 alex 	if(( Client_Type( client ) != CLIENT_USER ) && ( Client_Type( client ) != CLIENT_SERVER ) && ( Client_Type( client ) != CLIENT_SERVICE ))
285 5063de59 2002-07-29 alex 	{
286 5063de59 2002-07-29 alex 		/* noch nicht registrierte Verbindung.
287 5063de59 2002-07-29 alex 		 * Das Prefix wird ignoriert. */
288 5063de59 2002-07-29 alex 		Req->prefix = NULL;
289 8adff592 2005-03-19 fw 		return true;
290 5063de59 2002-07-29 alex 	}
291 5063de59 2002-07-29 alex 
292 e0ed3aa1 2002-07-26 alex 	/* pruefen, ob der im Prefix angegebene Client bekannt ist */
293 e0ed3aa1 2002-07-26 alex 	c = Client_Search( Req->prefix );
294 e0ed3aa1 2002-07-26 alex 	if( ! c )
295 e0ed3aa1 2002-07-26 alex 	{
296 e0ed3aa1 2002-07-26 alex 		/* im Prefix angegebener Client ist nicht bekannt */
297 b0b797b3 2002-11-28 alex 		Log( LOG_ERR, "Invalid prefix \"%s\", client not known (connection %d, command %s)!?", Req->prefix, Idx, Req->command );
298 8adff592 2005-03-19 fw 		if( ! Conn_WriteStr( Idx, "ERROR :Invalid prefix \"%s\", client not known!?", Req->prefix )) *Closed = true;
299 8adff592 2005-03-19 fw 		return false;
300 e0ed3aa1 2002-07-26 alex 	}
301 5063de59 2002-07-29 alex 
302 e0ed3aa1 2002-07-26 alex 	/* pruefen, ob der Client mit dem angegebenen Prefix in Richtung
303 e0ed3aa1 2002-07-26 alex 	 * des Senders liegt, d.h. sicherstellen, dass das Prefix nicht
304 e0ed3aa1 2002-07-26 alex 	 * gefaelscht ist */
305 5063de59 2002-07-29 alex 	if( Client_NextHop( c ) != client )
306 e0ed3aa1 2002-07-26 alex 	{
307 e0ed3aa1 2002-07-26 alex 		/* das angegebene Prefix ist aus dieser Richtung, also
308 e0ed3aa1 2002-07-26 alex 		 * aus der gegebenen Connection, ungueltig! */
309 b0b797b3 2002-11-28 alex 		Log( LOG_ERR, "Spoofed prefix \"%s\" from \"%s\" (connection %d, command %s)!", Req->prefix, Client_Mask( Client_GetFromConn( Idx )), Idx, Req->command );
310 8adff592 2005-03-19 fw 		Conn_Close( Idx, NULL, "Spoofed prefix", true);
311 8adff592 2005-03-19 fw 		*Closed = true;
312 8adff592 2005-03-19 fw 		return false;
313 e0ed3aa1 2002-07-26 alex 	}
314 e0ed3aa1 2002-07-26 alex 
315 8adff592 2005-03-19 fw 	return true;
316 6e07fb41 2001-12-21 alex } /* Validate_Prefix */
317 6e07fb41 2001-12-21 alex 
318 6e07fb41 2001-12-21 alex 
319 8adff592 2005-03-19 fw LOCAL bool
320 8adff592 2005-03-19 fw Validate_Command( CONN_ID Idx, REQUEST *Req, bool *Closed )
321 6e07fb41 2001-12-21 alex {
322 e0ed3aa1 2002-07-26 alex 	assert( Idx >= 0 );
323 6e07fb41 2001-12-21 alex 	assert( Req != NULL );
324 8adff592 2005-03-19 fw 	*Closed = false;
325 e0ed3aa1 2002-07-26 alex 
326 8adff592 2005-03-19 fw 	return true;
327 6e07fb41 2001-12-21 alex } /* Validate_Comman */
328 6e07fb41 2001-12-21 alex 
329 6e07fb41 2001-12-21 alex 
330 8adff592 2005-03-19 fw LOCAL bool
331 8adff592 2005-03-19 fw Validate_Args( CONN_ID Idx, REQUEST *Req, bool *Closed )
332 6e07fb41 2001-12-21 alex {
333 e0ed3aa1 2002-07-26 alex 	assert( Idx >= 0 );
334 6e07fb41 2001-12-21 alex 	assert( Req != NULL );
335 8adff592 2005-03-19 fw 	*Closed = false;
336 e0ed3aa1 2002-07-26 alex 
337 8adff592 2005-03-19 fw 	return true;
338 6e07fb41 2001-12-21 alex } /* Validate_Args */
339 6e07fb41 2001-12-21 alex 
340 6e07fb41 2001-12-21 alex 
341 8adff592 2005-03-19 fw LOCAL bool
342 c2f60abe 2002-05-27 alex Handle_Request( CONN_ID Idx, REQUEST *Req )
343 6e07fb41 2001-12-21 alex {
344 76c4f066 2001-12-23 alex 	/* Client-Request verarbeiten. Bei einem schwerwiegenden Fehler
345 8adff592 2005-03-19 fw 	 * wird die Verbindung geschlossen und false geliefert. */
346 76c4f066 2001-12-23 alex 
347 1c8c92af 2002-01-05 alex 	CLIENT *client, *target, *prefix;
348 8adff592 2005-03-19 fw 	char str[LINE_LEN];
349 8adff592 2005-03-19 fw 	bool result;
350 1e59617d 2002-11-30 alex 	COMMAND *cmd;
351 8adff592 2005-03-19 fw 	int i;
352 76c4f066 2001-12-23 alex 
353 6e07fb41 2001-12-21 alex 	assert( Idx >= 0 );
354 6e07fb41 2001-12-21 alex 	assert( Req != NULL );
355 6e07fb41 2001-12-21 alex 	assert( Req->command != NULL );
356 6e07fb41 2001-12-21 alex 
357 76c4f066 2001-12-23 alex 	client = Client_GetFromConn( Idx );
358 76c4f066 2001-12-23 alex 	assert( client != NULL );
359 1c8c92af 2002-01-05 alex 
360 fc1118cb 2003-01-12 alex 	/* Statuscode? */
361 fc1118cb 2003-01-12 alex 	if(( Client_Type( client ) == CLIENT_SERVER ) && ( strlen( Req->command ) == 3 ) && ( atoi( Req->command ) > 100 ))
362 fc1118cb 2003-01-12 alex 	{
363 fc1118cb 2003-01-12 alex 		/* Command is a status code from an other server */
364 1c8c92af 2002-01-05 alex 
365 fc1118cb 2003-01-12 alex 		/* Determine target */
366 fc1118cb 2003-01-12 alex 		if( Req->argc > 0 ) target = Client_Search( Req->argv[0] );
367 1c8c92af 2002-01-05 alex 		else target = NULL;
368 9e18ec30 2002-01-07 alex 		if( ! target )
369 9e18ec30 2002-01-07 alex 		{
370 fc1118cb 2003-01-12 alex 			/* Status code without target!? */
371 dd09b17e 2002-11-20 alex 			if( Req->argc > 0 ) Log( LOG_WARNING, "Unknown target for status code %s: \"%s\"", Req->command, Req->argv[0] );
372 dd09b17e 2002-11-20 alex 			else Log( LOG_WARNING, "Unknown target for status code %s!", Req->command );
373 8adff592 2005-03-19 fw 			return true;
374 9e18ec30 2002-01-07 alex 		}
375 9e18ec30 2002-01-07 alex 		if( target == Client_ThisServer( ))
376 9e18ec30 2002-01-07 alex 		{
377 fc1118cb 2003-01-12 alex 			/* This server is the target, ignore it */
378 9e18ec30 2002-01-07 alex 			Log( LOG_DEBUG, "Ignored status code %s from \"%s\".", Req->command, Client_ID( client ));
379 8adff592 2005-03-19 fw 			return true;
380 9e18ec30 2002-01-07 alex 		}
381 76c4f066 2001-12-23 alex 
382 fc1118cb 2003-01-12 alex 		/* Determine source */
383 9e18ec30 2002-01-07 alex 		if( ! Req->prefix[0] )
384 9e18ec30 2002-01-07 alex 		{
385 fc1118cb 2003-01-12 alex 			/* Oops, no prefix!? */
386 fc1118cb 2003-01-12 alex 			Log( LOG_WARNING, "Got status code %s from \"%s\" without prefix!?", Req->command, Client_ID( client ));
387 8adff592 2005-03-19 fw 			return true;
388 9e18ec30 2002-01-07 alex 		}
389 bc4ed226 2002-03-25 alex 		else prefix = Client_Search( Req->prefix );
390 9e18ec30 2002-01-07 alex 		if( ! prefix )
391 9e18ec30 2002-01-07 alex 		{
392 fc1118cb 2003-01-12 alex 			/* Oops, unknown prefix!? */
393 fc1118cb 2003-01-12 alex 			Log( LOG_WARNING, "Got status code %s from unknown source: \"%s\"", Req->command, Req->prefix );
394 8adff592 2005-03-19 fw 			return true;
395 9e18ec30 2002-01-07 alex 		}
396 1c8c92af 2002-01-05 alex 
397 fc1118cb 2003-01-12 alex 		/* Forward status code */
398 695631b2 2002-12-26 alex 		strlcpy( str, Req->command, sizeof( str ));
399 1c8c92af 2002-01-05 alex 		for( i = 0; i < Req->argc; i++ )
400 1c8c92af 2002-01-05 alex 		{
401 6626395c 2002-12-26 alex 			if( i < Req->argc - 1 ) strlcat( str, " ", sizeof( str ));
402 6626395c 2002-12-26 alex 			else strlcat( str, " :", sizeof( str ));
403 6626395c 2002-12-26 alex 			strlcat( str, Req->argv[i], sizeof( str ));
404 1c8c92af 2002-01-05 alex 		}
405 ec474a4b 2002-10-04 alex 		return IRC_WriteStrClientPrefix( target, prefix, "%s", str );
406 1c8c92af 2002-01-05 alex 	}
407 1c8c92af 2002-01-05 alex 
408 1e59617d 2002-11-30 alex 	cmd = My_Commands;
409 1e59617d 2002-11-30 alex 	while( cmd->name )
410 1e59617d 2002-11-30 alex 	{
411 1e59617d 2002-11-30 alex 		/* Befehl suchen */
412 1e59617d 2002-11-30 alex 		if( strcasecmp( Req->command, cmd->name ) != 0 )
413 1e59617d 2002-11-30 alex 		{
414 1e59617d 2002-11-30 alex 			cmd++; continue;
415 1e59617d 2002-11-30 alex 		}
416 1e59617d 2002-11-30 alex 
417 1e59617d 2002-11-30 alex 		if( Client_Type( client ) & cmd->type )
418 1e59617d 2002-11-30 alex 		{
419 17f7c6d3 2002-12-18 alex 			/* Command is allowed for this client: call it and count produced bytes */
420 17f7c6d3 2002-12-18 alex 			Conn_ResetWCounter( );
421 17f7c6d3 2002-12-18 alex 			result = (cmd->function)( client, Req );
422 17f7c6d3 2002-12-18 alex 			cmd->bytes += Conn_WCounter( );
423 17f7c6d3 2002-12-18 alex 
424 17f7c6d3 2002-12-18 alex 			/* Adjust counters */
425 17f7c6d3 2002-12-18 alex 			if( Client_Type( client ) != CLIENT_SERVER ) cmd->lcount++;
426 17f7c6d3 2002-12-18 alex 			else cmd->rcount++;
427 17f7c6d3 2002-12-18 alex 
428 17f7c6d3 2002-12-18 alex 			return result;
429 1e59617d 2002-11-30 alex 		}
430 1e59617d 2002-11-30 alex 		else
431 1e59617d 2002-11-30 alex 		{
432 1e59617d 2002-11-30 alex 			/* Befehl ist fuer diesen Client-Typ nicht erlaubt! */
433 1e59617d 2002-11-30 alex 			return IRC_WriteStrClient( client, ERR_NOTREGISTERED_MSG, Client_ID( client ));
434 1e59617d 2002-11-30 alex 		}
435 1e59617d 2002-11-30 alex 	}
436 d1ac4039 2002-09-03 alex 	
437 76c4f066 2001-12-23 alex 	/* Unbekannter Befehl */
438 3d2e9448 2002-01-05 alex 	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" );
439 1e59617d 2002-11-30 alex 	if( Client_Type( client ) != CLIENT_SERVER ) return IRC_WriteStrClient( client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( client ), Req->command );
440 8adff592 2005-03-19 fw 	else return true;
441 6e07fb41 2001-12-21 alex } /* Handle_Request */
442 6e07fb41 2001-12-21 alex 
443 6e07fb41 2001-12-21 alex 
444 6e07fb41 2001-12-21 alex /* -eof- */