WebSVN – HelenOS – Blame – //branches/network/uspace/srv/net/tl/tl_common.c

Rev	Author	Line No.	Line
4726	mejdrech	1	/*
		2	* Copyright (c) 2008 Lukas Mejdrech
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
		29	/** @addtogroup net_tl
		30	* @{
		31	*/
		32
		33	/** @file
		34	* Transport layer common functions implementation.
		35	* @see tl_common.h
		36	*/
		37
		38	#include <async.h>
		39	#include <ipc/services.h>
		40
		41	#include "../err.h"
		42
		43	#include "../structures/packet/packet.h"
		44	#include "../structures/packet/packet_client.h"
		45
		46	#include "../include/icmp_interface.h"
		47	#include "../include/in.h"
		48	#include "../include/in6.h"
		49	#include "../include/inet.h"
		50	#include "../include/socket_codes.h"
		51	#include "../include/socket_errno.h"
		52
		53	#include "tl_common.h"
		54
		55	int tl_get_address_port( const struct sockaddr * addr, int addrlen, uint16_t * port ){
		56	const struct sockaddr_in * address_in;
		57	const struct sockaddr_in6 * address_in6;
		58
		59	if( addrlen < sizeof( struct sockaddr )) return EINVAL;
		60	switch( addr->sa_family ){
		61	case AF_INET:
		62	if( addrlen != sizeof( struct sockaddr_in )) return EINVAL;
		63	address_in = ( struct sockaddr_in * ) addr;
		64	* port = address_in->sin_port;
		65	break;
		66	case AF_INET6:
		67	if( addrlen != sizeof( struct sockaddr_in6 )) return EINVAL;
		68	address_in6 = ( struct sockaddr_in6 * ) addr;
		69	* port = address_in6->sin6_port;
		70	break;
		71	default:
		72	return EAFNOSUPPORT;
		73	}
		74	return EOK;
		75	}
		76
		77
		78	int tl_set_address_port( struct sockaddr * addr, int addrlen, uint16_t port ){
		79	struct sockaddr_in * address_in;
		80	struct sockaddr_in6 * address_in6;
		81	size_t length;
		82
		83	if( addrlen < 0 ) return EINVAL;
		84	length = ( size_t ) addrlen;
		85	if( length < sizeof( struct sockaddr )) return EINVAL;
		86	switch( addr->sa_family ){
		87	case AF_INET:
		88	if( length != sizeof( struct sockaddr_in )) return EINVAL;
		89	address_in = ( struct sockaddr_in * ) addr;
		90	address_in->sin_port = port;
		91	return EOK;
		92	case AF_INET6:
		93	if( length != sizeof( struct sockaddr_in6 )) return EINVAL;
		94	address_in6 = ( struct sockaddr_in6 * ) addr;
		95	address_in6->sin6_port = port;
		96	return EOK;
		97	default:
		98	return EAFNOSUPPORT;
		99	}
		100	}
		101
4731	mejdrech	102	int tl_prepare_icmp_packet( int packet_phone, int icmp_phone, packet_t packet, services_t error ){
4726	mejdrech	103	packet_t next;
		104	uint8_t * src;
		105	int length;
		106
		107	// detach the first packet and release the others
		108	next = pq_detach( packet );
		109	if( next ){
		110	pq_release( packet_phone, packet_get_id( next ));
		111	}
		112	length = packet_get_addr( packet, & src, NULL );
		113	if(( length > 0 )
		114	&& ( ! error )
		115	&& ( icmp_phone >= 0 )
		116	// set both addresses to the source one (avoids the source address deletion before setting the destination one)
		117	&& ( packet_set_addr( packet, src, src, ( size_t ) length ) == EOK )){
4731	mejdrech	118	return EOK;
4726	mejdrech	119	}else{
		120	pq_release( packet_phone, packet_get_id( packet ));
		121	}
4731	mejdrech	122	return ENOENT;
4726	mejdrech	123	}
		124
		125	int tl_socket_read_packet_data( int packet_phone, packet_ref packet, size_t prefix, const packet_dimension_ref dimension, const struct sockaddr * addr, socklen_t addrlen ){
		126	ERROR_DECLARE;
		127
		128	ipc_callid_t callid;
		129	size_t length;
		130	void * data;
		131
		132	if( ! dimension ) return EINVAL;
		133	// get the data length
		134	if( ! ipc_data_write_receive( & callid, & length )) return EINVAL;
		135	// get a new packet
		136	* packet = packet_get_4( packet_phone, length, dimension->addr_len, prefix + dimension->prefix, dimension->suffix );
		137	if( ! packet ) return ENOMEM;
		138	// allocate space in the packet
		139	data = packet_suffix( * packet, length );
		140	if( ! data ){
		141	pq_release( packet_phone, packet_get_id( * packet ));
		142	return ENOMEM;
		143	}
		144	// read the data into the packet
		145	if( ERROR_OCCURRED( ipc_data_write_finalize( callid, data, length ))
		146	// set the packet destination address
		147	\|\| ERROR_OCCURRED( packet_set_addr( * packet, NULL, ( uint8_t * ) addr, addrlen ))){
		148	pq_release( packet_phone, packet_get_id( * packet ));
		149	return ERROR_CODE;
		150	}
		151	return ( int ) length;
		152	}
		153
		154	/** @}
		155	*/

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(root)//branches/network/uspace/srv/net/tl/tl_common.c – Rev 4731