632 lines
20 KiB
C
632 lines
20 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) */
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/* Copyright (C) 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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#ifndef _UAPI_LINUX_BATADV_PACKET_H_
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#define _UAPI_LINUX_BATADV_PACKET_H_
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#include <asm/byteorder.h>
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#include <linux/if_ether.h>
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#include <linux/types.h>
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/**
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* batadv_tp_is_error() - Check throughput meter return code for error
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* @n: throughput meter return code
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*
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* Return: 0 when not error was detected, != 0 otherwise
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*/
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#define batadv_tp_is_error(n) ((__u8)(n) > 127 ? 1 : 0)
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/**
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* enum batadv_packettype - types for batman-adv encapsulated packets
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* @BATADV_IV_OGM: originator messages for B.A.T.M.A.N. IV
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* @BATADV_BCAST: broadcast packets carrying broadcast payload
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* @BATADV_CODED: network coded packets
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* @BATADV_ELP: echo location packets for B.A.T.M.A.N. V
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* @BATADV_OGM2: originator messages for B.A.T.M.A.N. V
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*
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* @BATADV_UNICAST: unicast packets carrying unicast payload traffic
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* @BATADV_UNICAST_FRAG: unicast packets carrying a fragment of the original
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* payload packet
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* @BATADV_UNICAST_4ADDR: unicast packet including the originator address of
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* the sender
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* @BATADV_ICMP: unicast packet like IP ICMP used for ping or traceroute
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* @BATADV_UNICAST_TVLV: unicast packet carrying TVLV containers
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*/
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enum batadv_packettype {
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/* 0x00 - 0x3f: local packets or special rules for handling */
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BATADV_IV_OGM = 0x00,
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BATADV_BCAST = 0x01,
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BATADV_CODED = 0x02,
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BATADV_ELP = 0x03,
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BATADV_OGM2 = 0x04,
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/* 0x40 - 0x7f: unicast */
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#define BATADV_UNICAST_MIN 0x40
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BATADV_UNICAST = 0x40,
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BATADV_UNICAST_FRAG = 0x41,
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BATADV_UNICAST_4ADDR = 0x42,
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BATADV_ICMP = 0x43,
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BATADV_UNICAST_TVLV = 0x44,
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#define BATADV_UNICAST_MAX 0x7f
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/* 0x80 - 0xff: reserved */
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};
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/**
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* enum batadv_subtype - packet subtype for unicast4addr
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* @BATADV_P_DATA: user payload
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* @BATADV_P_DAT_DHT_GET: DHT request message
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* @BATADV_P_DAT_DHT_PUT: DHT store message
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* @BATADV_P_DAT_CACHE_REPLY: ARP reply generated by DAT
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*/
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enum batadv_subtype {
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BATADV_P_DATA = 0x01,
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BATADV_P_DAT_DHT_GET = 0x02,
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BATADV_P_DAT_DHT_PUT = 0x03,
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BATADV_P_DAT_CACHE_REPLY = 0x04,
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};
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/* this file is included by batctl which needs these defines */
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#define BATADV_COMPAT_VERSION 15
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/**
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* enum batadv_iv_flags - flags used in B.A.T.M.A.N. IV OGM packets
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* @BATADV_NOT_BEST_NEXT_HOP: flag is set when the ogm packet is forwarded and
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* was previously received from someone other than the best neighbor.
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* @BATADV_PRIMARIES_FIRST_HOP: flag unused.
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* @BATADV_DIRECTLINK: flag is for the first hop or if rebroadcasted from a
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* one hop neighbor on the interface where it was originally received.
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*/
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enum batadv_iv_flags {
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BATADV_NOT_BEST_NEXT_HOP = 1UL << 0,
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BATADV_PRIMARIES_FIRST_HOP = 1UL << 1,
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BATADV_DIRECTLINK = 1UL << 2,
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};
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/**
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* enum batadv_icmp_packettype - ICMP message types
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* @BATADV_ECHO_REPLY: success reply to BATADV_ECHO_REQUEST
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* @BATADV_DESTINATION_UNREACHABLE: failure when route to destination not found
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* @BATADV_ECHO_REQUEST: request BATADV_ECHO_REPLY from destination
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* @BATADV_TTL_EXCEEDED: error after BATADV_ECHO_REQUEST traversed too many hops
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* @BATADV_PARAMETER_PROBLEM: return code for malformed messages
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* @BATADV_TP: throughput meter packet
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*/
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enum batadv_icmp_packettype {
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BATADV_ECHO_REPLY = 0,
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BATADV_DESTINATION_UNREACHABLE = 3,
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BATADV_ECHO_REQUEST = 8,
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BATADV_TTL_EXCEEDED = 11,
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BATADV_PARAMETER_PROBLEM = 12,
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BATADV_TP = 15,
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};
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/**
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* enum batadv_mcast_flags - flags for multicast capabilities and settings
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* @BATADV_MCAST_WANT_ALL_UNSNOOPABLES: we want all packets destined for
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* 224.0.0.0/24 or ff02::1
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* @BATADV_MCAST_WANT_ALL_IPV4: we want all IPv4 multicast packets
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* (both link-local and routable ones)
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* @BATADV_MCAST_WANT_ALL_IPV6: we want all IPv6 multicast packets
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* (both link-local and routable ones)
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* @BATADV_MCAST_WANT_NO_RTR4: we have no IPv4 multicast router and therefore
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* only need routable IPv4 multicast packets we signed up for explicitly
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* @BATADV_MCAST_WANT_NO_RTR6: we have no IPv6 multicast router and therefore
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* only need routable IPv6 multicast packets we signed up for explicitly
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*/
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enum batadv_mcast_flags {
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BATADV_MCAST_WANT_ALL_UNSNOOPABLES = 1UL << 0,
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BATADV_MCAST_WANT_ALL_IPV4 = 1UL << 1,
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BATADV_MCAST_WANT_ALL_IPV6 = 1UL << 2,
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BATADV_MCAST_WANT_NO_RTR4 = 1UL << 3,
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BATADV_MCAST_WANT_NO_RTR6 = 1UL << 4,
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};
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/* tt data subtypes */
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#define BATADV_TT_DATA_TYPE_MASK 0x0F
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/**
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* enum batadv_tt_data_flags - flags for tt data tvlv
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* @BATADV_TT_OGM_DIFF: TT diff propagated through OGM
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* @BATADV_TT_REQUEST: TT request message
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* @BATADV_TT_RESPONSE: TT response message
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* @BATADV_TT_FULL_TABLE: contains full table to replace existing table
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*/
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enum batadv_tt_data_flags {
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BATADV_TT_OGM_DIFF = 1UL << 0,
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BATADV_TT_REQUEST = 1UL << 1,
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BATADV_TT_RESPONSE = 1UL << 2,
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BATADV_TT_FULL_TABLE = 1UL << 4,
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};
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/**
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* enum batadv_vlan_flags - flags for the four MSB of any vlan ID field
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* @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not
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*/
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enum batadv_vlan_flags {
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BATADV_VLAN_HAS_TAG = 1UL << 15,
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};
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/**
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* enum batadv_bla_claimframe - claim frame types for the bridge loop avoidance
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* @BATADV_CLAIM_TYPE_CLAIM: claim of a client mac address
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* @BATADV_CLAIM_TYPE_UNCLAIM: unclaim of a client mac address
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* @BATADV_CLAIM_TYPE_ANNOUNCE: announcement of backbone with current crc
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* @BATADV_CLAIM_TYPE_REQUEST: request of full claim table
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* @BATADV_CLAIM_TYPE_LOOPDETECT: mesh-traversing loop detect packet
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*/
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enum batadv_bla_claimframe {
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BATADV_CLAIM_TYPE_CLAIM = 0x00,
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BATADV_CLAIM_TYPE_UNCLAIM = 0x01,
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BATADV_CLAIM_TYPE_ANNOUNCE = 0x02,
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BATADV_CLAIM_TYPE_REQUEST = 0x03,
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BATADV_CLAIM_TYPE_LOOPDETECT = 0x04,
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};
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/**
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* enum batadv_tvlv_type - tvlv type definitions
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* @BATADV_TVLV_GW: gateway tvlv
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* @BATADV_TVLV_DAT: distributed arp table tvlv
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* @BATADV_TVLV_NC: network coding tvlv
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* @BATADV_TVLV_TT: translation table tvlv
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* @BATADV_TVLV_ROAM: roaming advertisement tvlv
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* @BATADV_TVLV_MCAST: multicast capability tvlv
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*/
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enum batadv_tvlv_type {
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BATADV_TVLV_GW = 0x01,
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BATADV_TVLV_DAT = 0x02,
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BATADV_TVLV_NC = 0x03,
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BATADV_TVLV_TT = 0x04,
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BATADV_TVLV_ROAM = 0x05,
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BATADV_TVLV_MCAST = 0x06,
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};
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#pragma pack(2)
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/* the destination hardware field in the ARP frame is used to
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* transport the claim type and the group id
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*/
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struct batadv_bla_claim_dst {
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__u8 magic[3]; /* FF:43:05 */
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__u8 type; /* bla_claimframe */
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__be16 group; /* group id */
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};
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/**
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* struct batadv_ogm_packet - ogm (routing protocol) packet
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* @packet_type: batman-adv packet type, part of the general header
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* @version: batman-adv protocol version, part of the general header
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* @ttl: time to live for this packet, part of the general header
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* @flags: contains routing relevant flags - see enum batadv_iv_flags
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* @seqno: sequence identification
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* @orig: address of the source node
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* @prev_sender: address of the previous sender
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* @reserved: reserved byte for alignment
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* @tq: transmission quality
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* @tvlv_len: length of tvlv data following the ogm header
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*/
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struct batadv_ogm_packet {
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__u8 packet_type;
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__u8 version;
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__u8 ttl;
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__u8 flags;
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__be32 seqno;
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__u8 orig[ETH_ALEN];
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__u8 prev_sender[ETH_ALEN];
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__u8 reserved;
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__u8 tq;
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__be16 tvlv_len;
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};
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#define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet)
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/**
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* struct batadv_ogm2_packet - ogm2 (routing protocol) packet
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* @packet_type: batman-adv packet type, part of the general header
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* @version: batman-adv protocol version, part of the general header
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* @ttl: time to live for this packet, part of the general header
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* @flags: reserved for routing relevant flags - currently always 0
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* @seqno: sequence number
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* @orig: originator mac address
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* @tvlv_len: length of the appended tvlv buffer (in bytes)
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* @throughput: the currently flooded path throughput
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*/
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struct batadv_ogm2_packet {
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__u8 packet_type;
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__u8 version;
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__u8 ttl;
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__u8 flags;
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__be32 seqno;
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__u8 orig[ETH_ALEN];
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__be16 tvlv_len;
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__be32 throughput;
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};
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#define BATADV_OGM2_HLEN sizeof(struct batadv_ogm2_packet)
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/**
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* struct batadv_elp_packet - elp (neighbor discovery) packet
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* @packet_type: batman-adv packet type, part of the general header
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* @version: batman-adv protocol version, part of the general header
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* @orig: originator mac address
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* @seqno: sequence number
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* @elp_interval: currently used ELP sending interval in ms
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*/
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struct batadv_elp_packet {
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__u8 packet_type;
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__u8 version;
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__u8 orig[ETH_ALEN];
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__be32 seqno;
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__be32 elp_interval;
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};
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#define BATADV_ELP_HLEN sizeof(struct batadv_elp_packet)
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/**
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* struct batadv_icmp_header - common members among all the ICMP packets
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* @packet_type: batman-adv packet type, part of the general header
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* @version: batman-adv protocol version, part of the general header
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* @ttl: time to live for this packet, part of the general header
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* @msg_type: ICMP packet type
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* @dst: address of the destination node
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* @orig: address of the source node
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* @uid: local ICMP socket identifier
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* @align: not used - useful for alignment purposes only
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*
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* This structure is used for ICMP packet parsing only and it is never sent
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* over the wire. The alignment field at the end is there to ensure that
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* members are padded the same way as they are in real packets.
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*/
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struct batadv_icmp_header {
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__u8 packet_type;
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__u8 version;
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__u8 ttl;
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__u8 msg_type; /* see ICMP message types above */
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__u8 dst[ETH_ALEN];
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__u8 orig[ETH_ALEN];
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__u8 uid;
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__u8 align[3];
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};
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/**
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* struct batadv_icmp_packet - ICMP packet
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* @packet_type: batman-adv packet type, part of the general header
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* @version: batman-adv protocol version, part of the general header
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* @ttl: time to live for this packet, part of the general header
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* @msg_type: ICMP packet type
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* @dst: address of the destination node
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* @orig: address of the source node
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* @uid: local ICMP socket identifier
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* @reserved: not used - useful for alignment
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* @seqno: ICMP sequence number
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*/
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struct batadv_icmp_packet {
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__u8 packet_type;
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__u8 version;
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__u8 ttl;
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__u8 msg_type; /* see ICMP message types above */
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__u8 dst[ETH_ALEN];
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__u8 orig[ETH_ALEN];
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__u8 uid;
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__u8 reserved;
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__be16 seqno;
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};
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/**
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* struct batadv_icmp_tp_packet - ICMP TP Meter packet
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* @packet_type: batman-adv packet type, part of the general header
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* @version: batman-adv protocol version, part of the general header
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* @ttl: time to live for this packet, part of the general header
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* @msg_type: ICMP packet type
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* @dst: address of the destination node
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* @orig: address of the source node
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* @uid: local ICMP socket identifier
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* @subtype: TP packet subtype (see batadv_icmp_tp_subtype)
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* @session: TP session identifier
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* @seqno: the TP sequence number
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* @timestamp: time when the packet has been sent. This value is filled in a
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* TP_MSG and echoed back in the next TP_ACK so that the sender can compute the
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* RTT. Since it is read only by the host which wrote it, there is no need to
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* store it using network order
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*/
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struct batadv_icmp_tp_packet {
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__u8 packet_type;
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__u8 version;
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__u8 ttl;
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__u8 msg_type; /* see ICMP message types above */
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__u8 dst[ETH_ALEN];
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__u8 orig[ETH_ALEN];
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__u8 uid;
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__u8 subtype;
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__u8 session[2];
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__be32 seqno;
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__be32 timestamp;
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};
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/**
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* enum batadv_icmp_tp_subtype - ICMP TP Meter packet subtypes
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* @BATADV_TP_MSG: Msg from sender to receiver
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* @BATADV_TP_ACK: acknowledgment from receiver to sender
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*/
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enum batadv_icmp_tp_subtype {
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BATADV_TP_MSG = 0,
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BATADV_TP_ACK,
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};
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#define BATADV_RR_LEN 16
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/**
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* struct batadv_icmp_packet_rr - ICMP RouteRecord packet
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* @packet_type: batman-adv packet type, part of the general header
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* @version: batman-adv protocol version, part of the general header
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* @ttl: time to live for this packet, part of the general header
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* @msg_type: ICMP packet type
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* @dst: address of the destination node
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* @orig: address of the source node
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* @uid: local ICMP socket identifier
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* @rr_cur: number of entries the rr array
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* @seqno: ICMP sequence number
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* @rr: route record array
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*/
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struct batadv_icmp_packet_rr {
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__u8 packet_type;
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__u8 version;
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__u8 ttl;
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__u8 msg_type; /* see ICMP message types above */
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__u8 dst[ETH_ALEN];
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__u8 orig[ETH_ALEN];
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__u8 uid;
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__u8 rr_cur;
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__be16 seqno;
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__u8 rr[BATADV_RR_LEN][ETH_ALEN];
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};
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#define BATADV_ICMP_MAX_PACKET_SIZE sizeof(struct batadv_icmp_packet_rr)
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/* All packet headers in front of an ethernet header have to be completely
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* divisible by 2 but not by 4 to make the payload after the ethernet
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* header again 4 bytes boundary aligned.
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*
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* A packing of 2 is necessary to avoid extra padding at the end of the struct
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* caused by a structure member which is larger than two bytes. Otherwise
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* the structure would not fulfill the previously mentioned rule to avoid the
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* misalignment of the payload after the ethernet header. It may also lead to
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* leakage of information when the padding it not initialized before sending.
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*/
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/**
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* struct batadv_unicast_packet - unicast packet for network payload
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* @packet_type: batman-adv packet type, part of the general header
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* @version: batman-adv protocol version, part of the general header
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* @ttl: time to live for this packet, part of the general header
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* @ttvn: translation table version number
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* @dest: originator destination of the unicast packet
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*/
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struct batadv_unicast_packet {
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__u8 packet_type;
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__u8 version;
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__u8 ttl;
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__u8 ttvn; /* destination translation table version number */
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__u8 dest[ETH_ALEN];
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/* "4 bytes boundary + 2 bytes" long to make the payload after the
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* following ethernet header again 4 bytes boundary aligned
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*/
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};
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/**
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* struct batadv_unicast_4addr_packet - extended unicast packet
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* @u: common unicast packet header
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* @src: address of the source
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* @subtype: packet subtype
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* @reserved: reserved byte for alignment
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*/
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struct batadv_unicast_4addr_packet {
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struct batadv_unicast_packet u;
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__u8 src[ETH_ALEN];
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__u8 subtype;
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__u8 reserved;
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/* "4 bytes boundary + 2 bytes" long to make the payload after the
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* following ethernet header again 4 bytes boundary aligned
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*/
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};
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/**
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* struct batadv_frag_packet - fragmented packet
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* @packet_type: batman-adv packet type, part of the general header
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* @version: batman-adv protocol version, part of the general header
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* @ttl: time to live for this packet, part of the general header
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* @dest: final destination used when routing fragments
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* @orig: originator of the fragment used when merging the packet
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* @no: fragment number within this sequence
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* @priority: priority of frame, from ToS IP precedence or 802.1p
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* @reserved: reserved byte for alignment
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* @seqno: sequence identification
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* @total_size: size of the merged packet
|
|
*/
|
|
struct batadv_frag_packet {
|
|
__u8 packet_type;
|
|
__u8 version; /* batman version field */
|
|
__u8 ttl;
|
|
#if defined(__BIG_ENDIAN_BITFIELD)
|
|
__u8 no:4;
|
|
__u8 priority:3;
|
|
__u8 reserved:1;
|
|
#elif defined(__LITTLE_ENDIAN_BITFIELD)
|
|
__u8 reserved:1;
|
|
__u8 priority:3;
|
|
__u8 no:4;
|
|
#else
|
|
#error "unknown bitfield endianness"
|
|
#endif
|
|
__u8 dest[ETH_ALEN];
|
|
__u8 orig[ETH_ALEN];
|
|
__be16 seqno;
|
|
__be16 total_size;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_bcast_packet - broadcast packet for network payload
|
|
* @packet_type: batman-adv packet type, part of the general header
|
|
* @version: batman-adv protocol version, part of the general header
|
|
* @ttl: time to live for this packet, part of the general header
|
|
* @reserved: reserved byte for alignment
|
|
* @seqno: sequence identification
|
|
* @orig: originator of the broadcast packet
|
|
*/
|
|
struct batadv_bcast_packet {
|
|
__u8 packet_type;
|
|
__u8 version; /* batman version field */
|
|
__u8 ttl;
|
|
__u8 reserved;
|
|
__be32 seqno;
|
|
__u8 orig[ETH_ALEN];
|
|
/* "4 bytes boundary + 2 bytes" long to make the payload after the
|
|
* following ethernet header again 4 bytes boundary aligned
|
|
*/
|
|
};
|
|
|
|
/**
|
|
* struct batadv_coded_packet - network coded packet
|
|
* @packet_type: batman-adv packet type, part of the general header
|
|
* @version: batman-adv protocol version, part of the general header
|
|
* @ttl: time to live for this packet, part of the general header
|
|
* @first_source: original source of first included packet
|
|
* @first_orig_dest: original destination of first included packet
|
|
* @first_crc: checksum of first included packet
|
|
* @first_ttvn: tt-version number of first included packet
|
|
* @second_ttl: ttl of second packet
|
|
* @second_dest: second receiver of this coded packet
|
|
* @second_source: original source of second included packet
|
|
* @second_orig_dest: original destination of second included packet
|
|
* @second_crc: checksum of second included packet
|
|
* @second_ttvn: tt version number of second included packet
|
|
* @coded_len: length of network coded part of the payload
|
|
*/
|
|
struct batadv_coded_packet {
|
|
__u8 packet_type;
|
|
__u8 version; /* batman version field */
|
|
__u8 ttl;
|
|
__u8 first_ttvn;
|
|
/* __u8 first_dest[ETH_ALEN]; - saved in mac header destination */
|
|
__u8 first_source[ETH_ALEN];
|
|
__u8 first_orig_dest[ETH_ALEN];
|
|
__be32 first_crc;
|
|
__u8 second_ttl;
|
|
__u8 second_ttvn;
|
|
__u8 second_dest[ETH_ALEN];
|
|
__u8 second_source[ETH_ALEN];
|
|
__u8 second_orig_dest[ETH_ALEN];
|
|
__be32 second_crc;
|
|
__be16 coded_len;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_unicast_tvlv_packet - generic unicast packet with tvlv payload
|
|
* @packet_type: batman-adv packet type, part of the general header
|
|
* @version: batman-adv protocol version, part of the general header
|
|
* @ttl: time to live for this packet, part of the general header
|
|
* @reserved: reserved field (for packet alignment)
|
|
* @src: address of the source
|
|
* @dst: address of the destination
|
|
* @tvlv_len: length of tvlv data following the unicast tvlv header
|
|
* @align: 2 bytes to align the header to a 4 byte boundary
|
|
*/
|
|
struct batadv_unicast_tvlv_packet {
|
|
__u8 packet_type;
|
|
__u8 version; /* batman version field */
|
|
__u8 ttl;
|
|
__u8 reserved;
|
|
__u8 dst[ETH_ALEN];
|
|
__u8 src[ETH_ALEN];
|
|
__be16 tvlv_len;
|
|
__u16 align;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_tvlv_hdr - base tvlv header struct
|
|
* @type: tvlv container type (see batadv_tvlv_type)
|
|
* @version: tvlv container version
|
|
* @len: tvlv container length
|
|
*/
|
|
struct batadv_tvlv_hdr {
|
|
__u8 type;
|
|
__u8 version;
|
|
__be16 len;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_tvlv_gateway_data - gateway data propagated through gw tvlv
|
|
* container
|
|
* @bandwidth_down: advertised uplink download bandwidth
|
|
* @bandwidth_up: advertised uplink upload bandwidth
|
|
*/
|
|
struct batadv_tvlv_gateway_data {
|
|
__be32 bandwidth_down;
|
|
__be32 bandwidth_up;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_tvlv_tt_data - tt data propagated through the tt tvlv container
|
|
* @flags: translation table flags (see batadv_tt_data_flags)
|
|
* @ttvn: translation table version number
|
|
* @num_vlan: number of announced VLANs. In the TVLV this struct is followed by
|
|
* one batadv_tvlv_tt_vlan_data object per announced vlan
|
|
*/
|
|
struct batadv_tvlv_tt_data {
|
|
__u8 flags;
|
|
__u8 ttvn;
|
|
__be16 num_vlan;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_tvlv_tt_vlan_data - vlan specific tt data propagated through
|
|
* the tt tvlv container
|
|
* @crc: crc32 checksum of the entries belonging to this vlan
|
|
* @vid: vlan identifier
|
|
* @reserved: unused, useful for alignment purposes
|
|
*/
|
|
struct batadv_tvlv_tt_vlan_data {
|
|
__be32 crc;
|
|
__be16 vid;
|
|
__u16 reserved;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_tvlv_tt_change - translation table diff data
|
|
* @flags: status indicators concerning the non-mesh client (see
|
|
* batadv_tt_client_flags)
|
|
* @reserved: reserved field - useful for alignment purposes only
|
|
* @addr: mac address of non-mesh client that triggered this tt change
|
|
* @vid: VLAN identifier
|
|
*/
|
|
struct batadv_tvlv_tt_change {
|
|
__u8 flags;
|
|
__u8 reserved[3];
|
|
__u8 addr[ETH_ALEN];
|
|
__be16 vid;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_tvlv_roam_adv - roaming advertisement
|
|
* @client: mac address of roaming client
|
|
* @vid: VLAN identifier
|
|
*/
|
|
struct batadv_tvlv_roam_adv {
|
|
__u8 client[ETH_ALEN];
|
|
__be16 vid;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_tvlv_mcast_data - payload of a multicast tvlv
|
|
* @flags: multicast flags announced by the orig node
|
|
* @reserved: reserved field
|
|
*/
|
|
struct batadv_tvlv_mcast_data {
|
|
__u8 flags;
|
|
__u8 reserved[3];
|
|
};
|
|
|
|
#pragma pack()
|
|
|
|
#endif /* _UAPI_LINUX_BATADV_PACKET_H_ */
|