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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 packet |
29 | /** @addtogroup packet |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** @file |
33 | /** @file |
34 | * Packet client implementation. |
34 | * Packet client implementation. |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #include <async.h> |
37 | #include <async.h> |
38 | #include <errno.h> |
38 | #include <errno.h> |
39 | #include <mem.h> |
39 | #include <mem.h> |
40 | #include <unistd.h> |
40 | #include <unistd.h> |
41 | //#include <stdio.h> |
41 | //#include <stdio.h> |
42 | 42 | ||
43 | #include <ipc/ipc.h> |
43 | #include <ipc/ipc.h> |
44 | #include <sys/mman.h> |
44 | #include <sys/mman.h> |
45 | 45 | ||
46 | #include "../../err.h" |
46 | #include "../../err.h" |
47 | #include "../../messages.h" |
47 | #include "../../messages.h" |
48 | 48 | ||
49 | #include "packet.h" |
49 | #include "packet.h" |
50 | #include "packet_header.h" |
50 | #include "packet_header.h" |
51 | #include "packet_client.h" |
51 | #include "packet_client.h" |
52 | 52 | ||
53 | int packet_copy_data( packet_t packet, const void * data, size_t length ){ |
53 | int packet_copy_data( packet_t packet, const void * data, size_t length ){ |
54 | if( ! packet_is_valid( packet )) return EINVAL; |
54 | if( ! packet_is_valid( packet )) return EINVAL; |
55 | if( packet->data_start + length >= packet->length ) return ENOMEM; |
55 | if( packet->data_start + length >= packet->length ) return ENOMEM; |
56 | memcpy(( void * ) packet + packet->data_start, data, length ); |
56 | memcpy(( void * ) packet + packet->data_start, data, length ); |
57 | if( packet->data_start + length > packet->data_end ){ |
57 | if( packet->data_start + length > packet->data_end ){ |
58 | packet->data_end = packet->data_start + length; |
58 | packet->data_end = packet->data_start + length; |
59 | } |
59 | } |
60 | return EOK; |
60 | return EOK; |
61 | } |
61 | } |
62 | 62 | ||
63 | void * packet_prefix( packet_t packet, size_t length ){ |
63 | void * packet_prefix( packet_t packet, size_t length ){ |
64 | if(( ! packet_is_valid( packet )) || ( packet->data_start - sizeof( struct packet ) - 2 * packet->addr_len < length )) return NULL; |
64 | if(( ! packet_is_valid( packet )) || ( packet->data_start - sizeof( struct packet ) - 2 * packet->addr_len < length )) return NULL; |
65 | packet->data_start -= length; |
65 | packet->data_start -= length; |
66 | return ( void * ) packet + packet->data_start; |
66 | return ( void * ) packet + packet->data_start; |
67 | } |
67 | } |
68 | 68 | ||
69 | void * packet_suffix( packet_t packet, size_t length ){ |
69 | void * packet_suffix( packet_t packet, size_t length ){ |
70 | if(( ! packet_is_valid( packet )) || ( packet->data_end + length >= packet->length )) return NULL; |
70 | if(( ! packet_is_valid( packet )) || ( packet->data_end + length >= packet->length )) return NULL; |
71 | packet->data_end += length; |
71 | packet->data_end += length; |
72 | return ( void * ) packet + packet->data_end - length; |
72 | return ( void * ) packet + packet->data_end - length; |
73 | } |
73 | } |
74 | 74 | ||
75 | int packet_trim( packet_t packet, size_t prefix, size_t suffix ){ |
75 | int packet_trim( packet_t packet, size_t prefix, size_t suffix ){ |
76 | if( ! packet_is_valid( packet )) return EINVAL; |
76 | if( ! packet_is_valid( packet )) return EINVAL; |
77 | if( prefix + suffix > packet->data_end - packet->data_start ) return ENOMEM; |
77 | if( prefix + suffix > packet->data_end - packet->data_start ) return ENOMEM; |
78 | packet->data_start += prefix; |
78 | packet->data_start += prefix; |
79 | packet->data_end -= suffix; |
79 | packet->data_end -= suffix; |
80 | return EOK; |
80 | return EOK; |
81 | } |
81 | } |
82 | 82 | ||
83 | packet_id_t packet_get_id( const packet_t packet ){ |
83 | packet_id_t packet_get_id( const packet_t packet ){ |
84 | return packet_is_valid( packet ) ? packet->packet_id : 0; |
84 | return packet_is_valid( packet ) ? packet->packet_id : 0; |
85 | } |
85 | } |
86 | 86 | ||
87 | int packet_get_addr( const packet_t packet, uint8_t ** src, uint8_t ** dest ){ |
87 | int packet_get_addr( const packet_t packet, uint8_t ** src, uint8_t ** dest ){ |
88 | if( !( packet_is_valid( packet ) && src && dest )) return EINVAL; |
88 | if( ! packet_is_valid( packet )) return EINVAL; |
89 | if( ! packet->addr_len ) return 0; |
89 | if( ! packet->addr_len ) return 0; |
90 | * src = ( void * ) packet + packet->src_addr; |
90 | if( src ) * src = ( void * ) packet + packet->src_addr; |
91 | * dest = ( void * ) packet + packet->dest_addr; |
91 | if( dest ) * dest = ( void * ) packet + packet->dest_addr; |
92 | return packet->addr_len; |
92 | return packet->addr_len; |
93 | } |
93 | } |
94 | 94 | ||
95 | size_t packet_get_data_length( const packet_t packet ){ |
95 | size_t packet_get_data_length( const packet_t packet ){ |
96 | if( ! packet_is_valid( packet )) return 0; |
96 | if( ! packet_is_valid( packet )) return 0; |
97 | return packet->data_end - packet->data_start; |
97 | return packet->data_end - packet->data_start; |
98 | } |
98 | } |
99 | 99 | ||
100 | void * packet_get_data( const packet_t packet ){ |
100 | void * packet_get_data( const packet_t packet ){ |
101 | if( ! packet_is_valid( packet )) return NULL; |
101 | if( ! packet_is_valid( packet )) return NULL; |
102 | return ( void * ) packet + packet->data_start; |
102 | return ( void * ) packet + packet->data_start; |
103 | } |
103 | } |
104 | 104 | ||
105 | int packet_set_addr( packet_t packet, const uint8_t * src, const uint8_t * dest, size_t addr_len ){ |
105 | int packet_set_addr( packet_t packet, const uint8_t * src, const uint8_t * dest, size_t addr_len ){ |
106 | size_t padding; |
106 | size_t padding; |
- | 107 | size_t allocated; |
|
107 | 108 | ||
108 | if( ! packet_is_valid( packet )) return EINVAL; |
109 | if( ! packet_is_valid( packet )) return EINVAL; |
- | 110 | allocated = packet->dest_addr - packet->src_addr; |
|
109 | if( packet->addr_len < addr_len ) return ENOMEM; |
111 | if( allocated < addr_len ) return ENOMEM; |
- | 112 | padding = allocated - addr_len; |
|
110 | padding = packet->addr_len - addr_len; |
113 | packet->addr_len = addr_len; |
111 | if( src ){ |
114 | if( src ){ |
112 | memcpy(( void * ) packet + packet->src_addr, src, addr_len ); |
115 | memcpy(( void * ) packet + packet->src_addr, src, addr_len ); |
113 | if( padding ) bzero(( void * ) packet + packet->src_addr + addr_len, padding ); |
116 | if( padding ) bzero(( void * ) packet + packet->src_addr + addr_len, padding ); |
114 | }else{ |
117 | }else{ |
115 | bzero(( void * ) packet + packet->src_addr + addr_len, packet->addr_len ); |
118 | bzero(( void * ) packet + packet->src_addr, allocated ); |
116 | } |
119 | } |
117 | if( dest ){ |
120 | if( dest ){ |
118 | memcpy(( void * ) packet + packet->dest_addr, dest, addr_len ); |
121 | memcpy(( void * ) packet + packet->dest_addr, dest, addr_len ); |
119 | if( padding ) bzero(( void * ) packet + packet->dest_addr + addr_len, padding ); |
122 | if( padding ) bzero(( void * ) packet + packet->dest_addr + addr_len, padding ); |
120 | }else{ |
123 | }else{ |
121 | bzero(( void * ) packet + packet->dest_addr + addr_len, packet->addr_len ); |
124 | bzero(( void * ) packet + packet->dest_addr, allocated ); |
122 | } |
125 | } |
123 | return EOK; |
126 | return EOK; |
124 | } |
127 | } |
125 | 128 | ||
126 | /** @} |
129 | /** @} |
127 | */ |
130 | */ |
128 | 131 |