minix/lib/liblwip/dist/src/include/lwip/prot/udp.h

   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 */