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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 | #include "../../include/socket_errno.h" |
|
43 | 44 | ||
44 | #include "../../structures/packet/packet.h" |
45 | #include "../../structures/packet/packet.h" |
45 | #include "../../structures/packet/packet_client.h" |
46 | #include "../../structures/packet/packet_client.h" |
46 | 47 | ||
47 | #include "ip_header.h" |
48 | #include "ip_header.h" |
48 | 49 | ||
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 | 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; |
51 | ip_header_ref header; |
51 | uint8_t * data; |
52 | uint8_t * data; |
52 | size_t padding; |
53 | size_t padding; |
53 | 54 | ||
54 | padding = ipopt_length % 4; |
55 | padding = ipopt_length % 4; |
55 | if( padding ){ |
56 | if( padding ){ |
56 | padding = 4 - padding; |
57 | padding = 4 - padding; |
57 | ipopt_length += padding; |
58 | ipopt_length += padding; |
58 | } |
59 | } |
59 | data = ( uint8_t * ) packet_prefix( packet, sizeof( ip_header_t ) + padding ); |
60 | data = ( uint8_t * ) packet_prefix( packet, sizeof( ip_header_t ) + padding ); |
60 | if( ! data ) return ENOMEM; |
61 | if( ! data ) return ENOMEM; |
61 | while( padding -- ) data[ sizeof( ip_header_t ) + padding ] = IPOPT_NOOP; |
62 | while( padding -- ) data[ sizeof( ip_header_t ) + padding ] = IPOPT_NOOP; |
62 | header = ( ip_header_ref ) data; |
63 | header = ( ip_header_ref ) data; |
63 | header->ihl = ( uint8_t ) ( sizeof( ip_header_t ) + ipopt_length ) / 4; |
64 | header->ihl = ( uint8_t ) ( sizeof( ip_header_t ) + ipopt_length ) / 4; |
64 | header->ttl = ttl ? (( ttl <= MAXTTL ) ? ttl : MAXTTL ) : IPDEFTTL; |
65 | header->ttl = ttl ? (( ttl <= MAXTTL ) ? ttl : MAXTTL ) : IPDEFTTL; |
65 | header->tos = tos; |
66 | header->tos = tos; |
66 | header->protocol = protocol; |
67 | header->protocol = protocol; |
67 | if( dont_fragment ) header->flags = IPFLAG_DONT_FRAGMENT; |
68 | if( dont_fragment ) header->flags = IPFLAG_DONT_FRAGMENT; |
68 | return EOK; |
69 | return EOK; |
69 | } |
70 | } |
70 | 71 | ||
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 | 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; |
73 | ip_header_ref header; |
73 | 74 | ||
74 | header = ( ip_header_ref ) packet_get_data( packet ); |
75 | header = ( ip_header_ref ) packet_get_data( packet ); |
75 | if(( ! header ) |
76 | if(( ! header ) |
76 | || ( packet_get_data_length( packet ) < sizeof( ip_header_t ))){ |
77 | || ( packet_get_data_length( packet ) < sizeof( ip_header_t ))){ |
77 | return ENOMEM; |
78 | return ENOMEM; |
78 | } |
79 | } |
79 | if( protocol ) * protocol = header->protocol; |
80 | if( protocol ) * protocol = header->protocol; |
80 | if( ttl ) * ttl = header->ttl; |
81 | if( ttl ) * ttl = header->ttl; |
81 | if( tos ) * tos = header->tos; |
82 | if( tos ) * tos = header->tos; |
82 | if( dont_fragment ) * dont_fragment = header->flags & IPFLAG_DONT_FRAGMENT; |
83 | if( dont_fragment ) * dont_fragment = header->flags & IPFLAG_DONT_FRAGMENT; |
83 | if( ipopt_length ){ |
84 | if( ipopt_length ){ |
84 | * ipopt_length = header->ihl * 4 - sizeof( ip_header_t ); |
85 | * ipopt_length = header->ihl * 4 - sizeof( ip_header_t ); |
85 | return sizeof( ip_header_t ); |
86 | return sizeof( ip_header_t ); |
86 | }else{ |
87 | }else{ |
87 | return header->ihl * 4; |
88 | return header->ihl * 4; |
88 | } |
89 | } |
89 | } |
90 | } |
90 | 91 | ||
91 | size_t ip_client_header_length( packet_t packet ){ |
92 | size_t ip_client_header_length( packet_t packet ){ |
92 | ip_header_ref header; |
93 | ip_header_ref header; |
93 | 94 | ||
94 | header = ( ip_header_ref ) packet_get_data( packet ); |
95 | header = ( ip_header_ref ) packet_get_data( packet ); |
95 | if(( ! header ) |
96 | if(( ! header ) |
96 | || ( packet_get_data_length( packet ) < sizeof( ip_header_t ))){ |
97 | || ( packet_get_data_length( packet ) < sizeof( ip_header_t ))){ |
97 | return 0; |
98 | return 0; |
98 | } |
99 | } |
99 | return header->ihl * 4u; |
100 | return header->ihl * 4u; |
100 | } |
101 | } |
- | 102 | ||
- | 103 | int ip_client_set_pseudo_header_data_length( ip_pseudo_header_ref header, size_t headerlen, size_t data_length ){ |
|
- | 104 | ipv4_pseudo_header_ref header_in; |
|
- | 105 | ||
- | 106 | if( headerlen == sizeof( ipv4_pseudo_header_t )){ |
|
- | 107 | header_in = ( ipv4_pseudo_header_ref ) header; |
|
- | 108 | header_in->data_length = htons( data_length ); |
|
- | 109 | return EOK; |
|
- | 110 | }else{ |
|
- | 111 | return EINVAL; |
|
- | 112 | } |
|
- | 113 | } |
|
- | 114 | ||
- | 115 | int ip_client_get_pseudo_header( ip_protocol_t protocol, struct sockaddr * src, socklen_t srclen, struct sockaddr * dest, socklen_t destlen, size_t data_length, ip_pseudo_header_ref * header, size_t * headerlen ){ |
|
- | 116 | ipv4_pseudo_header_ref header_in; |
|
- | 117 | struct sockaddr_in * address_in; |
|
- | 118 | ||
- | 119 | if( !( header && headerlen )) return EBADMEM; |
|
- | 120 | if( !( src && dest && ( srclen >= sizeof( struct sockaddr )) && ( srclen == destlen ) && ( src->sa_family == dest->sa_family ))) return EINVAL; |
|
- | 121 | switch( src->sa_family ){ |
|
- | 122 | case AF_INET: |
|
- | 123 | if( srclen != sizeof( struct sockaddr_in )) return EINVAL; |
|
- | 124 | * headerlen = sizeof( * header_in ); |
|
- | 125 | header_in = ( ipv4_pseudo_header_ref ) malloc( * headerlen ); |
|
- | 126 | if( ! header_in ) return ENOMEM; |
|
- | 127 | bzero( header_in, * headerlen ); |
|
- | 128 | address_in = ( struct sockaddr_in * ) dest; |
|
- | 129 | header_in->destination_address = address_in->sin_addr.s_addr; |
|
- | 130 | address_in = ( struct sockaddr_in * ) src; |
|
- | 131 | header_in->source_address = address_in->sin_addr.s_addr; |
|
- | 132 | header_in->protocol = protocol; |
|
- | 133 | header_in->data_length = htons( data_length ); |
|
- | 134 | * header = ( ip_pseudo_header_ref ) header_in; |
|
- | 135 | return EOK; |
|
- | 136 | // TODO IPv6 |
|
- | 137 | /* case AF_INET6: |
|
- | 138 | if( addrlen != sizeof( struct sockaddr_in6 )) return EINVAL; |
|
- | 139 | address_in6 = ( struct sockaddr_in6 * ) addr; |
|
- | 140 | return EOK; |
|
- | 141 | */ default: |
|
- | 142 | return EAFNOSUPPORT; |
|
- | 143 | } |
|
- | 144 | } |
|
101 | 145 | ||
102 | /** @} |
146 | /** @} |
103 | */ |
147 | */ |
104 | 148 |