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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 header. |
34 | * Packet header. |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #ifndef __NET_PACKET_HEADER_H__ |
37 | #ifndef __NET_PACKET_HEADER_H__ |
38 | #define __NET_PACKET_HEADER_H__ |
38 | #define __NET_PACKET_HEADER_H__ |
39 | 39 | ||
- | 40 | #include "../../messages.h" |
|
- | 41 | ||
40 | #include "packet.h" |
42 | #include "packet.h" |
41 | 43 | ||
42 | /** Packet integrity check magic value. |
44 | /** Packet integrity check magic value. |
43 | */ |
45 | */ |
44 | #define PACKET_MAGIC_VALUE 0x11227788 |
46 | #define PACKET_MAGIC_VALUE 0x11227788 |
45 | 47 | ||
46 | /** Packet header. |
48 | /** Packet header. |
47 | */ |
49 | */ |
48 | struct packet{ |
50 | struct packet{ |
49 | /** Packet identifier. |
51 | /** Packet identifier. |
50 | */ |
52 | */ |
51 | packet_id_t packet_id; |
53 | packet_id_t packet_id; |
52 | /** Packet queue sorting value. |
54 | /** Packet queue sorting value. |
53 | * The packet queue is sorted the ascending order. |
55 | * The packet queue is sorted the ascending order. |
54 | */ |
56 | */ |
55 | int order; |
57 | int order; |
56 | /** Packet metric. |
58 | /** Packet metric. |
57 | */ |
59 | */ |
58 | size_t metric; |
60 | size_t metric; |
59 | /** Previous packet in the queue. |
61 | /** Previous packet in the queue. |
60 | */ |
62 | */ |
61 | packet_id_t previous; |
63 | packet_id_t previous; |
62 | /** Next packet in the queue. |
64 | /** Next packet in the queue. |
63 | */ |
65 | */ |
64 | packet_id_t next; |
66 | packet_id_t next; |
65 | /** Total length of the packet. |
67 | /** Total length of the packet. |
66 | * Contains the header, the addresses and the data of the packet. |
68 | * Contains the header, the addresses and the data of the packet. |
67 | * Corresponds to the mapped sharable memory block. |
69 | * Corresponds to the mapped sharable memory block. |
68 | */ |
70 | */ |
69 | size_t length; |
71 | size_t length; |
70 | /** Source and destination addresses length. |
72 | /** Source and destination addresses length. |
71 | */ |
73 | */ |
72 | size_t addr_len; |
74 | size_t addr_len; |
73 | /** Souce address offset in bytes from the beginning of the packet header. |
75 | /** Souce address offset in bytes from the beginning of the packet header. |
74 | */ |
76 | */ |
75 | size_t src_addr; |
77 | size_t src_addr; |
76 | /** Destination address offset in bytes from the beginning of the packet header. |
78 | /** Destination address offset in bytes from the beginning of the packet header. |
77 | */ |
79 | */ |
78 | size_t dest_addr; |
80 | size_t dest_addr; |
79 | /** Reserved data prefix length in bytes. |
81 | /** Reserved data prefix length in bytes. |
80 | */ |
82 | */ |
81 | size_t max_prefix; |
83 | size_t max_prefix; |
82 | /** Reserved content length in bytes. |
84 | /** Reserved content length in bytes. |
83 | */ |
85 | */ |
84 | size_t max_content; |
86 | size_t max_content; |
85 | /** Actual data start offset in bytes from the beginning of the packet header. |
87 | /** Actual data start offset in bytes from the beginning of the packet header. |
86 | */ |
88 | */ |
87 | size_t data_start; |
89 | size_t data_start; |
88 | /** Actual data end offset in bytes from the beginning of the packet header. |
90 | /** Actual data end offset in bytes from the beginning of the packet header. |
89 | */ |
91 | */ |
90 | size_t data_end; |
92 | size_t data_end; |
91 | /** Integrity check magic value. |
93 | /** Integrity check magic value. |
92 | */ |
94 | */ |
93 | int magic_value; |
95 | int magic_value; |
94 | }; |
96 | }; |
95 | 97 | ||
96 | /** Returns whether the packet is valid. |
98 | /** Returns whether the packet is valid. |
97 | * @param packet The packet to be checked. Input parameter. |
99 | * @param packet The packet to be checked. Input parameter. |
98 | * @returns true if the packet is not NULL and the magic value is correct. |
100 | * @returns true if the packet is not NULL and the magic value is correct. |
99 | * @returns false otherwise. |
101 | * @returns false otherwise. |
100 | */ |
102 | */ |
101 | static inline int packet_is_valid( const packet_t packet ){ |
103 | static inline int packet_is_valid( const packet_t packet ){ |
102 | return packet && ( packet->magic_value == PACKET_MAGIC_VALUE ); |
104 | return packet && ( packet->magic_value == PACKET_MAGIC_VALUE ); |
103 | } |
105 | } |
104 | 106 | ||
105 | #endif |
107 | #endif |
106 | 108 | ||
107 | /** @} |
109 | /** @} |
108 | */ |
110 | */ |
109 | 111 |