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/* ethernet.h */
/*
* Routines for taking ethernet packets apart.
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the MPEG TS, PS and ES tools.
*
* The Initial Developer of the Original Code is Amino Communications Ltd.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Richard Watts, Kynesim <rrw@kynesim.co.uk>
*
* ***** END LICENSE BLOCK *****
*/
#ifndef _ethernet_h
#define _ethernet_h
#include <stdio.h>
#include <stdlib.h>
#include "compat.h"
#include "pcap.h"
typedef struct ethernet_vlan_info_s
{
char cfi;
char pcp;
int vid;
} ethernet_vlan_info_t;
typedef struct ethernet_packet_s
{
// Source address.
uint8_t src_addr[6];
// Destination ddress.
uint8_t dst_addr[6];
// 0x5DC is the maximum frame length in 802.3
#define ETHERNET_MAY_BE_IP(typeorlen) ((typeorlen) == 0x800 || (typeorlen) <= 0x5DC)
#define ETHERNET_TYPE_IP 0x800
// Type
uint16_t typeorlen;
#define ETHERNET_VLANS_MAX 2
int vlan_count;
ethernet_vlan_info_t vlans[ETHERNET_VLANS_MAX];
// Checksum if present. Note that pcap doesn't include checksums.
uint32_t checksum;
} ethernet_packet_t;
#define ETHERNET_ERR_PKT_TOO_SHORT (-1)
#define ETHERNET_ERR_TOO_MANY_VLANS (-2)
/*
* \param out_st OUT Index into data at which ethernet payload starts.
* \param out_len OUT Length of the ethernet payload.
* \return 0 on success, -1 on failure.
*
*/
int ethernet_packet_from_pcap(pcaprec_hdr_t *hdr,
const uint8_t *data,
const uint32_t len,
ethernet_packet_t *pkt,
uint32_t *out_st,
uint32_t *out_len);
#endif
/* End file */
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