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/****************************************************************************
* include/nuttx/net/udp.h
* Header file for the uIP UDP stack.
*
* The uIP UDP stack header file contains definitions for a number
* of C macros that are used by uIP programs as well as internal uIP
* structures, UDP header structures and function declarations.
*
* Copyright (C) 2007, 2009, 2012, 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* This logic was leveraged from uIP which also has a BSD-style license:
*
* Author Adam Dunkels <adam@dunkels.com>
* Copyright (c) 2001-2003, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __INCLUDE_NUTTX_NET_UDP_H
#define __INCLUDE_NUTTX_NET_UDP_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <nuttx/net/netconfig.h>
#include <nuttx/net/ip.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Header sizes */
#define UDP_HDRLEN 8 /* Size of UDP header */
#ifdef CONFIG_NET_IPv4
# define IPv4UDP_HDRLEN (UDP_HDRLEN + IPv4_HDRLEN) /* Size of IPv4 + UDP headers */
#endif
#ifdef CONFIG_NET_IPv6
# define IPv6UDP_HDRLEN (UDP_HDRLEN + IPv4_HDRLEN) /* Size of IPv6 + UDP headers */
#endif
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/* The UDP header */
struct udp_hdr_s
{
uint16_t srcport;
uint16_t destport;
uint16_t udplen;
uint16_t udpchksum;
};
/* The UDP and IP headers */
#ifdef CONFIG_NET_IPv4
struct udp_iphdr_s
{
/* IPv4 header */
uint8_t vhl; /* 8-bit Version (4) and header length (5 or 6) */
uint8_t tos; /* 8-bit Type of service (e.g., 6=TCP) */
uint8_t len[2]; /* 16-bit Total length */
uint8_t ipid[2]; /* 16-bit Identification */
uint8_t ipoffset[2]; /* 16-bit IP flags + fragment offset */
uint8_t ttl; /* 8-bit Time to Live */
uint8_t proto; /* 8-bit Protocol */
uint16_t ipchksum; /* 16-bit Header checksum */
uint16_t srcipaddr[2]; /* 32-bit Source IP address */
uint16_t destipaddr[2]; /* 32-bit Destination IP address */
/* UDP header */
uint16_t srcport;
uint16_t destport;
uint16_t udplen;
uint16_t udpchksum;
};
#endif
#ifdef CONFIG_NET_IPv6
struct udp_ipv6hdr_s
{
/* IPv6 Ip header */
uint8_t vtc; /* Bits 0-3: version, bits 4-7: traffic class (MS) */
uint8_t tcf; /* Bits 0-3: traffic class (LS), 4-bits: flow label (MS) */
uint16_t flow; /* 16-bit flow label (LS) */
uint8_t len[2]; /* 16-bit Payload length */
uint8_t proto; /* 8-bit Next header (same as IPv4 protocol field) */
uint8_t ttl; /* 8-bit Hop limit (like IPv4 TTL field) */
net_ipv6addr_t srcipaddr; /* 128-bit Source address */
net_ipv6addr_t destipaddr; /* 128-bit Destination address */
/* UDP header */
uint16_t srcport;
uint16_t destport;
uint16_t udplen;
uint16_t udpchksum;
};
#endif
/* The structure holding the UDP statistics that are gathered if
* CONFIG_NET_STATISTICS is defined.
*/
#ifdef CONFIG_NET_STATISTICS
struct udp_stats_s
{
net_stats_t drop; /* Number of dropped UDP segments */
net_stats_t recv; /* Number of recived UDP segments */
net_stats_t sent; /* Number of sent UDP segments */
net_stats_t chkerr; /* Number of UDP segments with a bad checksum */
};
#endif
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#endif /* __INCLUDE_NUTTX_NET_UDP_H */
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