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111 lines
3.5 KiB
111 lines
3.5 KiB
/*****************************************************************************
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* ethernet.h: Ethernet frames
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*****************************************************************************
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* Copyright (C) 2015 VideoLAN
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*
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* Authors: Benjamin Cohen <bencoh@notk.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject
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* to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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/*
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* Normative references:
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* - IEEE Std 802.3-2012 (December 2012)
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* - IETF RFC 7042 IANA Considerations and IETF Protocol
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* and Documentation Usage for IEEE 802 Parameters (October 2013)
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*/
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#ifndef __BITSTREAM_IEEE_ETHERNET_H__
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#define __BITSTREAM_IEEE_ETHERNET_H__
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#include <stdint.h>
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#include <string.h> /* memcpy */
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#define ETHERNET_ADDR_LEN 6
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#define ETHERNET_HEADER_LEN (2*ETHERNET_ADDR_LEN + 2)
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#define ETHERNET_VLAN_LEN 4
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#define ETHERNET_TYPE_IP 0x0800
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#define ETHERNET_TYPE_ARP 0x0806
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#define ETHERNET_TYPE_RARP 0x8035
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#define ETHERNET_TYPE_VLAN 0x8100
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#define ETHERNET_TYPE_IPV6 0x86DD
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#define ETHERNET_TYPE_PPP 0x880B
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#define ETHERNET_TYPE_MPLS 0x8847
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#define ETHERNET_TYPE_PPPOE_DISC 0x8863
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#define ETHERNET_TYPE_PPPOE_SESSION 0x8864
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#define ETHERNET_TYPE_LLDP 0x88CC
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static inline uint8_t *ethernet_dstaddr(uint8_t *p_ethernet)
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{
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return p_ethernet;
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}
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static inline void ethernet_get_dstaddr(const uint8_t *p_ethernet, uint8_t *p_addr)
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{
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memcpy(p_addr, p_ethernet, ETHERNET_ADDR_LEN);
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}
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static inline void ethernet_set_dstaddr(uint8_t *p_ethernet, const uint8_t *p_addr)
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{
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memcpy(ethernet_dstaddr(p_ethernet), p_addr, ETHERNET_ADDR_LEN);
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}
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static inline uint8_t *ethernet_srcaddr(uint8_t *p_ethernet)
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{
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return p_ethernet + ETHERNET_ADDR_LEN;
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}
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static inline void ethernet_get_srcaddr(const uint8_t *p_ethernet, uint8_t *p_addr)
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{
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memcpy(p_addr, p_ethernet + ETHERNET_ADDR_LEN, ETHERNET_ADDR_LEN);
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}
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static inline void ethernet_set_srcaddr(uint8_t *p_ethernet, const uint8_t *p_addr)
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{
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memcpy(ethernet_srcaddr(p_ethernet), p_addr, ETHERNET_ADDR_LEN);
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}
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static inline uint16_t ethernet_get_lentype(const uint8_t *p_ethernet)
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{
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return (p_ethernet[12] << 8) | p_ethernet[13];
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}
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static inline void ethernet_set_lentype(uint8_t *p_ethernet, uint16_t lentype)
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{
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p_ethernet[12] = (lentype & 0xff00) >> 8;
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p_ethernet[13] = (lentype & 0xff);
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}
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static inline uint8_t *ethernet_payload(uint8_t *p_ethernet)
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{
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return p_ethernet + ETHERNET_HEADER_LEN;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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