54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/**
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* @file ether.h
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* @brief Provides definitions useful when working with Ethernet packets.
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* @note Copyright (C) 2012 Richard Cochran <richardcochran@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef HAVE_ETHER_H
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#define HAVE_ETHER_H
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#include <stdint.h>
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#define EUI48 6
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#define EUI64 8
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#define MAC_LEN EUI48
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#define GUID_LEN EUI64
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#define GUID_OFFSET 36
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typedef uint8_t eth_addr[MAC_LEN];
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struct eth_hdr {
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eth_addr dst;
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eth_addr src;
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uint16_t type;
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} __attribute__((packed));
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#define VLAN_HLEN 4
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struct vlan_hdr {
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eth_addr dst;
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eth_addr src;
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uint16_t tpid;
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uint16_t tci;
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uint16_t type;
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} __attribute__((packed));
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#define OFF_ETYPE (2 * sizeof(eth_addr))
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#endif
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