diff --git a/ieee/ethernet.h b/ieee/ethernet.h new file mode 100644 index 0000000..e15519f --- /dev/null +++ b/ieee/ethernet.h @@ -0,0 +1,110 @@ +/***************************************************************************** + * ethernet.h: Ethernet frames + ***************************************************************************** + * Copyright (C) 2015 VideoLAN + * + * Authors: Benjamin Cohen + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject + * to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY + * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + *****************************************************************************/ + +/* + * Normative references: + * - IEEE Std 802.3-2012 (December 2012) + * - IETF RFC 7042 IANA Considerations and IETF Protocol + * and Documentation Usage for IEEE 802 Parameters (October 2013) + */ + +#ifndef __BITSTREAM_IEEE_ETHERNET_H__ +#define __BITSTREAM_IEEE_ETHERNET_H__ + +#include +#include /* memcpy */ + +#ifdef __cplusplus +extern "C" +{ +#endif + +#define ETHERNET_ADDR_LEN 6 +#define ETHERNET_HEADER_LEN (2*ETHERNET_ADDR_LEN + 2) + +#define ETHERNET_TYPE_IP 0x0800 +#define ETHERNET_TYPE_ARP 0x0806 +#define ETHERNET_TYPE_RARP 0x8035 +#define ETHERNET_TYPE_VLAN 0x8100 +#define ETHERNET_TYPE_IPV6 0x86DD +#define ETHERNET_TYPE_PPP 0x880B +#define ETHERNET_TYPE_MPLS 0x8847 +#define ETHERNET_TYPE_PPPOE_DISC 0x8863 +#define ETHERNET_TYPE_PPPOE_SESSION 0x8864 +#define ETHERNET_TYPE_LLDP 0x88CC + +static inline uint8_t *ethernet_dstaddr(uint8_t *p_ethernet) +{ + return p_ethernet; +} + +static inline void ethernet_get_dstaddr(const uint8_t *p_ethernet, uint8_t *p_addr) +{ + memcpy(p_addr, p_ethernet, ETHERNET_ADDR_LEN); +} + +static inline void ethernet_set_dstaddr(uint8_t *p_ethernet, const uint8_t *p_addr) +{ + memcpy(ethernet_dstaddr(p_ethernet), p_addr, ETHERNET_ADDR_LEN); +} + +static inline uint8_t *ethernet_srcaddr(uint8_t *p_ethernet) +{ + return p_ethernet + ETHERNET_ADDR_LEN; +} + +static inline void ethernet_get_srcaddr(const uint8_t *p_ethernet, uint8_t *p_addr) +{ + memcpy(p_addr, p_ethernet + ETHERNET_ADDR_LEN, ETHERNET_ADDR_LEN); +} + +static inline void ethernet_set_srcaddr(uint8_t *p_ethernet, const uint8_t *p_addr) +{ + memcpy(ethernet_srcaddr(p_ethernet), p_addr, ETHERNET_ADDR_LEN); +} + +static inline uint16_t ethernet_get_lentype(const uint8_t *p_ethernet) +{ + return (p_ethernet[12] << 8) | p_ethernet[13]; +} + +static inline void ethernet_set_lentype(uint8_t *p_ethernet, uint16_t lentype) +{ + p_ethernet[12] = (lentype & 0xff00) >> 8; + p_ethernet[13] = (lentype & 0xff); +} + +static inline uint8_t *ethernet_payload(uint8_t *p_ethernet) +{ + return p_ethernet + ETHERNET_HEADER_LEN; +} + +#ifdef __cplusplus +} +#endif + +#endif