137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*
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* Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, Simon Wunderlich
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*
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*/
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#ifndef _NET_BATMAN_ADV_PACKET_H_
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#define _NET_BATMAN_ADV_PACKET_H_
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#define ETH_P_BATMAN 0x4305 /* unofficial/not registered Ethertype */
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#define BAT_PACKET 0x01
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#define BAT_ICMP 0x02
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#define BAT_UNICAST 0x03
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#define BAT_BCAST 0x04
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#define BAT_VIS 0x05
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#define BAT_UNICAST_FRAG 0x06
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/* this file is included by batctl which needs these defines */
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#define COMPAT_VERSION 12
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#define DIRECTLINK 0x40
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#define VIS_SERVER 0x20
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#define PRIMARIES_FIRST_HOP 0x10
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/* ICMP message types */
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#define ECHO_REPLY 0
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#define DESTINATION_UNREACHABLE 3
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#define ECHO_REQUEST 8
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#define TTL_EXCEEDED 11
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#define PARAMETER_PROBLEM 12
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/* vis defines */
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#define VIS_TYPE_SERVER_SYNC 0
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#define VIS_TYPE_CLIENT_UPDATE 1
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/* fragmentation defines */
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#define UNI_FRAG_HEAD 0x01
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struct batman_packet {
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uint8_t packet_type;
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uint8_t version; /* batman version field */
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uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
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uint8_t tq;
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uint32_t seqno;
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uint8_t orig[6];
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uint8_t prev_sender[6];
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uint8_t ttl;
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uint8_t num_hna;
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uint8_t gw_flags; /* flags related to gateway class */
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uint8_t align;
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} __packed;
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#define BAT_PACKET_LEN sizeof(struct batman_packet)
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struct icmp_packet {
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uint8_t packet_type;
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uint8_t version; /* batman version field */
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uint8_t msg_type; /* see ICMP message types above */
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uint8_t ttl;
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uint8_t dst[6];
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uint8_t orig[6];
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uint16_t seqno;
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uint8_t uid;
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} __packed;
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#define BAT_RR_LEN 16
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/* icmp_packet_rr must start with all fields from imcp_packet
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* as this is assumed by code that handles ICMP packets */
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struct icmp_packet_rr {
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uint8_t packet_type;
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uint8_t version; /* batman version field */
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uint8_t msg_type; /* see ICMP message types above */
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uint8_t ttl;
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uint8_t dst[6];
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uint8_t orig[6];
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uint16_t seqno;
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uint8_t uid;
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uint8_t rr_cur;
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uint8_t rr[BAT_RR_LEN][ETH_ALEN];
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} __packed;
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struct unicast_packet {
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uint8_t packet_type;
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uint8_t version; /* batman version field */
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uint8_t dest[6];
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uint8_t ttl;
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} __packed;
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struct unicast_frag_packet {
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uint8_t packet_type;
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uint8_t version; /* batman version field */
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uint8_t dest[6];
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uint8_t ttl;
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uint8_t flags;
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uint8_t orig[6];
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uint16_t seqno;
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} __packed;
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struct bcast_packet {
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uint8_t packet_type;
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uint8_t version; /* batman version field */
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uint8_t orig[6];
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uint8_t ttl;
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uint32_t seqno;
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} __packed;
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struct vis_packet {
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uint8_t packet_type;
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uint8_t version; /* batman version field */
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uint8_t vis_type; /* which type of vis-participant sent this? */
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uint8_t entries; /* number of entries behind this struct */
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uint32_t seqno; /* sequence number */
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uint8_t ttl; /* TTL */
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uint8_t vis_orig[6]; /* originator that informs about its
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* neighbors */
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uint8_t target_orig[6]; /* who should receive this packet */
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uint8_t sender_orig[6]; /* who sent or rebroadcasted this packet */
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} __packed;
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#endif /* _NET_BATMAN_ADV_PACKET_H_ */
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