135 lines
5.2 KiB
C
135 lines
5.2 KiB
C
/****************************************************************************
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* include/nuttx/net/udp.h
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* Header file for the uIP UDP stack.
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*
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* The uIP UDP stack header file contains definitions for a number
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* of C macros that are used by uIP programs as well as internal uIP
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* structures, UDP header structures and function declarations.
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*
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* Copyright (C) 2007, 2009, 2012, 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* This logic was leveraged from uIP which also has a BSD-style license:
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*
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* Author Adam Dunkels <adam@dunkels.com>
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* Copyright (c) 2001-2003, Adam Dunkels.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_NET_UDP_H
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#define __INCLUDE_NUTTX_NET_UDP_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/ip.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Header sizes */
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#define UDP_HDRLEN 8 /* Size of UDP header */
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#define IPUDP_HDRLEN (UDP_HDRLEN + IP_HDRLEN) /* Size of IP + UDP header */
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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/* The UDP and IP headers */
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struct udp_iphdr_s
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{
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#ifdef CONFIG_NET_IPv6
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/* IPv6 Ip header */
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uint8_t vtc; /* Bits 0-3: version, bits 4-7: traffic class (MS) */
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uint8_t tcf; /* Bits 0-3: traffic class (LS), 4-bits: flow label (MS) */
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uint16_t flow; /* 16-bit flow label (LS) */
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uint8_t len[2]; /* 16-bit Payload length */
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uint8_t proto; /* 8-bit Next header (same as IPv4 protocol field) */
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uint8_t ttl; /* 8-bit Hop limit (like IPv4 TTL field) */
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net_ip6addr_t srcipaddr; /* 128-bit Source address */
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net_ip6addr_t destipaddr; /* 128-bit Destination address */
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#else /* CONFIG_NET_IPv6 */
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/* IPv4 header */
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uint8_t vhl; /* 8-bit Version (4) and header length (5 or 6) */
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uint8_t tos; /* 8-bit Type of service (e.g., 6=TCP) */
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uint8_t len[2]; /* 16-bit Total length */
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uint8_t ipid[2]; /* 16-bit Identification */
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uint8_t ipoffset[2]; /* 16-bit IP flags + fragment offset */
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uint8_t ttl; /* 8-bit Time to Live */
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uint8_t proto; /* 8-bit Protocol */
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uint16_t ipchksum; /* 16-bit Header checksum */
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uint16_t srcipaddr[2]; /* 32-bit Source IP address */
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uint16_t destipaddr[2]; /* 32-bit Destination IP address */
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#endif /* CONFIG_NET_IPv6 */
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/* UDP header */
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uint16_t srcport;
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uint16_t destport;
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uint16_t udplen;
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uint16_t udpchksum;
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};
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/* The structure holding the UDP statistics that are gathered if
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* CONFIG_NET_STATISTICS is defined.
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*/
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#ifdef CONFIG_NET_STATISTICS
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struct udp_stats_s
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{
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net_stats_t drop; /* Number of dropped UDP segments */
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net_stats_t recv; /* Number of recived UDP segments */
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net_stats_t sent; /* Number of sent UDP segments */
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net_stats_t chkerr; /* Number of UDP segments with a bad checksum */
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};
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#endif /* __INCLUDE_NUTTX_NET_UDP_H */
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