WebSVN – HelenOS – Diff – /branches/network/uspace/srv/net/il/ip/ip_client.c


/*
 * Copyright (c) 2009 Lukas Mejdrech
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup ip
 *  @{
 */
 
/** @file
 *  IP client interface implementation.
 *  @see ip_client.h
 */
 
#include <errno.h>
 
#include <sys/types.h>
 
#include "../../include/ip_client.h"
 
#include "../../structures/packet/packet.h"
#include "../../structures/packet/packet_client.h"
 
#include "ip_header.h"
 
int ip_client_prepare_packet( packet_t packet, ip_protocol_t protocol, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment, size_t ipopt_length ){
    ip_header_ref   header;
    uint8_t *       data;
    size_t          padding;
 
    padding =  ipopt_length % 4;
    if( padding ){
        padding = 4 - padding;
        ipopt_length += padding;
    }
    data = ( uint8_t * ) packet_prefix( packet, sizeof( ip_header_t ) + padding );
    if( ! data ) return ENOMEM;
    while( padding -- ) data[ sizeof( ip_header_t ) + padding ] = IPOPT_NOOP;
    header = ( ip_header_ref ) data;
    header->ihl = ( uint8_t ) ( sizeof( ip_header_t ) + ipopt_length ) / 4;
    header->ttl = ttl ? (( ttl <= MAXTTL ) ? ttl : MAXTTL ) : IPDEFTTL;
    header->tos = tos;
    header->protocol = protocol;
    if( dont_fragment ) header->flags = IPFLAG_DONT_FRAGMENT;
    return EOK;
}
 
int ip_client_process_packet( packet_t packet, ip_protocol_t * protocol, ip_ttl_t * ttl, ip_tos_t * tos, int * dont_fragment, size_t * ipopt_length ){
    ip_header_ref   header;
 
    header = ( ip_header_ref ) packet_get_data( packet );
    if(( ! header )
    || ( packet_get_data_length( packet ) < sizeof( ip_header_t ))){
        return ENOMEM;
    }
    if( protocol ) * protocol = header->protocol;
    if( ttl ) * ttl = header->ttl;
    if( tos ) * tos = header->tos;
    if( dont_fragment ) * dont_fragment = header->flags & IPFLAG_DONT_FRAGMENT;
    if( ipopt_length ){
        * ipopt_length = header->ihl * 4 - sizeof( ip_header_t );
        return sizeof( ip_header_t );
    }else{
        return header->ihl * 4;
    }
}
 
size_t ip_client_header_length( packet_t packet ){
    ip_header_ref   header;
 
    header = ( ip_header_ref ) packet_get_data( packet );
    if(( ! header )
    || ( packet_get_data_length( packet ) < sizeof( ip_header_t ))){
        return 0;
    }
    return header->ihl * 4u;
}
 
/** @}
 */
 

Rev 4707	Rev 4721
1	/*	1	/*
2	* Copyright (c) 2009 Lukas Mejdrech	2	* Copyright (c) 2009 Lukas Mejdrech
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup ip	29	/** @addtogroup ip
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/** @file	33	/** @file
34	* IP client interface implementation.	34	* IP client interface implementation.
35	* @see ip_client.h	35	* @see ip_client.h
36	*/	36	*/
37		37
38	#include <errno.h>	38	#include <errno.h>
39		39
40	#include <sys/types.h>	40	#include <sys/types.h>
41		41
42	#include "../../include/ip_client.h"	42	#include "../../include/ip_client.h"
43		43
44	#include "../../structures/packet/packet.h"	44	#include "../../structures/packet/packet.h"
45	#include "../../structures/packet/packet_client.h"	45	#include "../../structures/packet/packet_client.h"
46		46
47	#include "ip_header.h"	47	#include "ip_header.h"
48		48
49	int ip_client_prepare_packet( packet_t packet, ip_protocol_t protocol, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment, size_t ipopt_length ){	49	int ip_client_prepare_packet( packet_t packet, ip_protocol_t protocol, ip_ttl_t ttl, ip_tos_t tos, int dont_fragment, size_t ipopt_length ){
50	ip_header_ref header;	50	ip_header_ref header;
51	uint8_t * data;	51	uint8_t * data;
52	size_t padding;	52	size_t padding;
53		53
54	padding = ipopt_length % 4;	54	padding = ipopt_length % 4;
55	if( padding ){	55	if( padding ){
56	padding = 4 - padding;	56	padding = 4 - padding;
57	ipopt_length += padding;	57	ipopt_length += padding;
58	}	58	}
59	data = ( uint8_t * ) packet_prefix( packet, sizeof( ip_header_t ) + padding );	59	data = ( uint8_t * ) packet_prefix( packet, sizeof( ip_header_t ) + padding );
60	if( ! data ) return ENOMEM;	60	if( ! data ) return ENOMEM;
61	while( padding -- ) data[ sizeof( ip_header_t ) + padding ] = IPOPT_NOOP;	61	while( padding -- ) data[ sizeof( ip_header_t ) + padding ] = IPOPT_NOOP;
62	header = ( ip_header_ref ) data;	62	header = ( ip_header_ref ) data;
63	header->ihl = ( uint8_t ) ( sizeof( ip_header_t ) + ipopt_length ) / 4;	63	header->ihl = ( uint8_t ) ( sizeof( ip_header_t ) + ipopt_length ) / 4;
64	header->ttl = ttl ? (( ttl <= MAXTTL ) ? ttl : MAXTTL ) : IPDEFTTL;	64	header->ttl = ttl ? (( ttl <= MAXTTL ) ? ttl : MAXTTL ) : IPDEFTTL;
65	header->tos = tos;	65	header->tos = tos;
66	header->protocol = protocol;	66	header->protocol = protocol;
67	if( dont_fragment ) header->flags = IPFLAG_DONT_FRAGMENT;	67	if( dont_fragment ) header->flags = IPFLAG_DONT_FRAGMENT;
68	return EOK;	68	return EOK;
69	}	69	}
70		70
71	int ip_client_process_packet( packet_t packet, ip_protocol_t * protocol, ip_ttl_t * ttl, ip_tos_t * tos, int * dont_fragment, size_t * ipopt_length ){	71	int ip_client_process_packet( packet_t packet, ip_protocol_t * protocol, ip_ttl_t * ttl, ip_tos_t * tos, int * dont_fragment, size_t * ipopt_length ){
72	ip_header_ref header;	72	ip_header_ref header;
73		73
74	header = ( ip_header_ref ) packet_get_data( packet );	74	header = ( ip_header_ref ) packet_get_data( packet );
-		75	if(( ! header )
-		76	\|\| ( packet_get_data_length( packet ) < sizeof( ip_header_t ))){
75	if( ! header ) return ENOMEM;	77	return ENOMEM;
-		78	}
76	if( protocol ) * protocol = header->protocol;	79	if( protocol ) * protocol = header->protocol;
77	if( ttl ) * ttl = header->ttl;	80	if( ttl ) * ttl = header->ttl;
78	if( tos ) * tos = header->tos;	81	if( tos ) * tos = header->tos;
79	if( dont_fragment ) * dont_fragment = header->flags & IPFLAG_DONT_FRAGMENT;	82	if( dont_fragment ) * dont_fragment = header->flags & IPFLAG_DONT_FRAGMENT;
80	if( ipopt_length ){	83	if( ipopt_length ){
81	* ipopt_length = header->ihl * 4 - sizeof( ip_header_t );	84	* ipopt_length = header->ihl * 4 - sizeof( ip_header_t );
82	return sizeof( ip_header_t );	85	return sizeof( ip_header_t );
83	}else{	86	}else{
84	return header->ihl * 4;	87	return header->ihl * 4;
85	}	88	}
86	}	89	}
87		90
88	int ip_client_header_length( packet_t packet ){	91	size_t ip_client_header_length( packet_t packet ){
89	ip_header_ref header;	92	ip_header_ref header;
90		93
91	header = ( ip_header_ref ) packet_get_data( packet );	94	header = ( ip_header_ref ) packet_get_data( packet );
92	if( ! header ) return ENOMEM;	95	if(( ! header )
-		96	\|\| ( packet_get_data_length( packet ) < sizeof( ip_header_t ))){
-		97	return 0;
-		98	}
93	return header->ihl * 4;	99	return header->ihl * 4u;
94	}	100	}
95		101
96	/** @}	102	/** @}
97	*/	103	*/
98		104

Subversion Repositories HelenOS

(root)/branches/network/uspace/srv/net/il/ip/ip_client.c – Rev 4707 → 4721