![Antonio Quartulli](/assets/img/avatar_default.png)
To keep transtable consistency among all the nodes, an originator must not send not yet announced clients within a full table TT_RESPONSE. Instead, deleted client have to be kept in the table in order to be sent within an immediate TT_RESPONSE. In this way all the nodes in the network will always provide the same response for the same request. All the modification are committed at the next ttvn increment event. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
219 lines
5.4 KiB
C
219 lines
5.4 KiB
C
/*
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* Copyright (C) 2007-2011 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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enum bat_packettype {
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BAT_PACKET = 0x01,
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BAT_ICMP = 0x02,
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BAT_UNICAST = 0x03,
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BAT_BCAST = 0x04,
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BAT_VIS = 0x05,
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BAT_UNICAST_FRAG = 0x06,
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BAT_TT_QUERY = 0x07,
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BAT_ROAM_ADV = 0x08
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};
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/* this file is included by batctl which needs these defines */
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#define COMPAT_VERSION 14
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enum batman_flags {
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PRIMARIES_FIRST_HOP = 1 << 4,
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VIS_SERVER = 1 << 5,
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DIRECTLINK = 1 << 6
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};
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/* ICMP message types */
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enum icmp_packettype {
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ECHO_REPLY = 0,
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DESTINATION_UNREACHABLE = 3,
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ECHO_REQUEST = 8,
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TTL_EXCEEDED = 11,
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PARAMETER_PROBLEM = 12
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};
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/* vis defines */
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enum vis_packettype {
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VIS_TYPE_SERVER_SYNC = 0,
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VIS_TYPE_CLIENT_UPDATE = 1
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};
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/* fragmentation defines */
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enum unicast_frag_flags {
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UNI_FRAG_HEAD = 1 << 0,
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UNI_FRAG_LARGETAIL = 1 << 1
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};
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/* TT_QUERY subtypes */
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#define TT_QUERY_TYPE_MASK 0x3
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enum tt_query_packettype {
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TT_REQUEST = 0,
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TT_RESPONSE = 1
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};
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/* TT_QUERY flags */
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enum tt_query_flags {
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TT_FULL_TABLE = 1 << 2
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};
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/* TT_CLIENT flags.
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* Flags from 1 to 1 << 7 are sent on the wire, while flags from 1 << 8 to
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* 1 << 15 are used for local computation only */
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enum tt_client_flags {
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TT_CLIENT_DEL = 1 << 0,
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TT_CLIENT_ROAM = 1 << 1,
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TT_CLIENT_NOPURGE = 1 << 8,
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TT_CLIENT_NEW = 1 << 9,
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TT_CLIENT_PENDING = 1 << 10
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};
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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 ttl;
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uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
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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 gw_flags; /* flags related to gateway class */
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uint8_t tq;
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uint8_t tt_num_changes;
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uint8_t ttvn; /* translation table version number */
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uint16_t tt_crc;
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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 ttl;
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uint8_t msg_type; /* see ICMP message types above */
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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 reserved;
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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 ttl;
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uint8_t msg_type; /* see ICMP message types above */
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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 ttl;
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uint8_t ttvn; /* destination translation table version number */
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uint8_t dest[6];
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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 ttl;
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uint8_t ttvn; /* destination translation table version number */
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uint8_t dest[6];
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uint8_t flags;
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uint8_t align;
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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 ttl;
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uint8_t reserved;
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uint32_t seqno;
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uint8_t orig[6];
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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 ttl; /* TTL */
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uint8_t vis_type; /* which type of vis-participant sent this? */
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uint32_t seqno; /* sequence number */
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uint8_t entries; /* number of entries behind this struct */
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uint8_t reserved;
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uint8_t vis_orig[6]; /* originator that announces its 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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struct tt_query_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 ttl;
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/* the flag field is a combination of:
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* - TT_REQUEST or TT_RESPONSE
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* - TT_FULL_TABLE */
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uint8_t flags;
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uint8_t dst[ETH_ALEN];
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uint8_t src[ETH_ALEN];
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/* the ttvn field is:
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* if TT_REQUEST: ttvn that triggered the
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* request
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* if TT_RESPONSE: new ttvn for the src
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* orig_node */
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uint8_t ttvn;
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/* tt_data field is:
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* if TT_REQUEST: crc associated with the
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* ttvn
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* if TT_RESPONSE: table_size */
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uint16_t tt_data;
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} __packed;
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struct roam_adv_packet {
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uint8_t packet_type;
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uint8_t version;
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uint8_t ttl;
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uint8_t reserved;
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uint8_t dst[ETH_ALEN];
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uint8_t src[ETH_ALEN];
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uint8_t client[ETH_ALEN];
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} __packed;
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struct tt_change {
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uint8_t flags;
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uint8_t addr[ETH_ALEN];
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} __packed;
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#endif /* _NET_BATMAN_ADV_PACKET_H_ */
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