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+/**
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+ * @file arp_proto.h
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+ * @author Ambroz Bizjak <ambrop7@gmail.com>
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+ *
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+ * @section LICENSE
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+ *
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+ * This file is part of BadVPN.
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+ *
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+ * BadVPN is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2
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+ * as published by the Free Software Foundation.
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+ *
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+ * BadVPN 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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+ * @section DESCRIPTION
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+ *
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+ * Definitions for the ARP protocol.
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+ */
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+
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+#ifndef BADVPN_ARP_PROTO_H
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+#define BADVPN_ARP_PROTO_H
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+
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+#include <stdint.h>
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+
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+#define ARP_HARDWARE_TYPE_ETHERNET 1
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+
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+#define ARP_OPCODE_REQUEST 1
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+#define ARP_OPCODE_REPLY 2
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+
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+struct arp_packet {
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+ uint16_t hardware_type;
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+ uint16_t protocol_type;
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+ uint8_t hardware_size;
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+ uint8_t protocol_size;
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+ uint16_t opcode;
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+ uint8_t sender_mac[6];
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+ uint32_t sender_ip;
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+ uint8_t target_mac[6];
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+ uint32_t target_ip;
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+} __attribute__((packed));
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+
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+#endif
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ambrop7