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prot/udp.h
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1 /**
2  * @file
3  * UDP protocol definitions
4  */
5 
6 /*
7  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without modification,
11  * are permitted provided that the following conditions are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright notice,
14  * this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  * 3. The name of the author may not be used to endorse or promote products
19  * derived from this software without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30  * OF SUCH DAMAGE.
31  *
32  * This file is part of the lwIP TCP/IP stack.
33  *
34  * Author: Adam Dunkels <adam@sics.se>
35  *
36  */
37 #ifndef LWIP_HDR_PROT_UDP_H
38 #define LWIP_HDR_PROT_UDP_H
39 
40 #include "lwip/arch.h"
41 
42 #ifdef __cplusplus
43 extern "C" {
44 #endif
45 
46 #define UDP_HLEN 8
47 
48 /* Fields are (of course) in network byte order. */
49 #ifdef PACK_STRUCT_USE_INCLUDES
50 # include "arch/bpstruct.h"
51 #endif
52 PACK_STRUCT_BEGIN
53 struct udp_hdr {
54  PACK_STRUCT_FIELD(u16_t src);
55  PACK_STRUCT_FIELD(u16_t dest); /* src/dest UDP ports */
56  PACK_STRUCT_FIELD(u16_t len);
57  PACK_STRUCT_FIELD(u16_t chksum);
58 } PACK_STRUCT_STRUCT;
59 PACK_STRUCT_END
60 #ifdef PACK_STRUCT_USE_INCLUDES
61 # include "arch/epstruct.h"
62 #endif
63 
64 #ifdef __cplusplus
65 }
66 #endif
67 
68 #endif /* LWIP_HDR_PROT_UDP_H */
udp_hdr
Definition: prot/udp.h:53
PACK_STRUCT_BEGIN
#define PACK_STRUCT_BEGIN
Packed structs support.
Definition: arch.h:307
PACK_STRUCT_STRUCT
#define PACK_STRUCT_STRUCT
Packed structs support.
Definition: arch.h:328
PACK_STRUCT_END
#define PACK_STRUCT_END
Packed structs support.
Definition: arch.h:316
arch.h
Support for different processor and compiler architectures.
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