src/include/lwip/prot/ethernet.h (LwIP)

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/** * @file * Ethernet protocol definitions */ /* * Copyright (c) 2001-2004 Swedish Institute of Computer Science. * 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. * * This file is part of the lwIP TCP/IP stack. * * Author: Adam Dunkels <adam@sics.se> * */ #ifndef LWIP_HDR_PROT_ETHERNET_H #define LWIP_HDR_PROT_ETHERNET_H #include "lwip/arch.h" #include "lwip/prot/ieee.h" #ifdef __cplusplus extern "C" { #endif #ifndef ETH_HWADDR_LEN #ifdef ETHARP_HWADDR_LEN #define ETH_HWADDR_LEN ETHARP_HWADDR_LEN /* compatibility mode */ #else #define ETH_HWADDR_LEN 6 #endif #endif #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/bpstruct.h" #endif PACK_STRUCT_BEGIN /** An Ethernet MAC address */ struct eth_addr { PACK_STRUCT_FLD_8(u8_t addr[ETH_HWADDR_LEN]); } PACK_STRUCT_STRUCT; PACK_STRUCT_END #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/epstruct.h" #endif /** Initialize a struct eth_addr with its 6 bytes (takes care of correct braces) */ #define ETH_ADDR(b0, b1, b2, b3, b4, b5) {{b0, b1, b2, b3, b4, b5}} #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/bpstruct.h" #endif PACK_STRUCT_BEGIN /** Ethernet header */ struct eth_hdr { #if ETH_PAD_SIZE PACK_STRUCT_FLD_8(u8_t padding[ETH_PAD_SIZE]); #endif PACK_STRUCT_FLD_S(struct eth_addr dest); PACK_STRUCT_FLD_S(struct eth_addr src); PACK_STRUCT_FIELD(u16_t type); } PACK_STRUCT_STRUCT; PACK_STRUCT_END #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/epstruct.h" #endif #define SIZEOF_ETH_HDR (14 + ETH_PAD_SIZE) #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/bpstruct.h" #endif PACK_STRUCT_BEGIN /** VLAN header inserted between ethernet header and payload * if 'type' in ethernet header is ETHTYPE_VLAN. * See IEEE802.Q */ struct eth_vlan_hdr { PACK_STRUCT_FIELD(u16_t prio_vid); PACK_STRUCT_FIELD(u16_t tpid); } PACK_STRUCT_STRUCT; PACK_STRUCT_END #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/epstruct.h" #endif #define SIZEOF_VLAN_HDR 4 #define VLAN_ID(vlan_hdr) (lwip_htons((vlan_hdr)->prio_vid) & 0xFFF) /** The 24-bit IANA IPv4-multicast OUI is 01-00-5e: */ #define LL_IP4_MULTICAST_ADDR_0 0x01 #define LL_IP4_MULTICAST_ADDR_1 0x00 #define LL_IP4_MULTICAST_ADDR_2 0x5e /** IPv6 multicast uses this prefix */ #define LL_IP6_MULTICAST_ADDR_0 0x33 #define LL_IP6_MULTICAST_ADDR_1 0x33 #define eth_addr_cmp(addr1, addr2) (memcmp((addr1)->addr, (addr2)->addr, ETH_HWADDR_LEN) == 0) #ifdef __cplusplus } #endif #endif /* LWIP_HDR_PROT_ETHERNET_H */