| /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: |
| * |
| * Marek Lindner, Simon Wunderlich |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of version 2 of the GNU General Public |
| * License as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| * 02110-1301, USA |
| */ |
| |
| #ifndef _NET_BATMAN_ADV_PACKET_H_ |
| #define _NET_BATMAN_ADV_PACKET_H_ |
| |
| #define BATADV_ETH_P_BATMAN 0x4305 /* unofficial/not registered Ethertype */ |
| |
| enum batadv_packettype { |
| BATADV_IV_OGM = 0x01, |
| BATADV_ICMP = 0x02, |
| BATADV_UNICAST = 0x03, |
| BATADV_BCAST = 0x04, |
| BATADV_VIS = 0x05, |
| BATADV_UNICAST_FRAG = 0x06, |
| BATADV_TT_QUERY = 0x07, |
| BATADV_ROAM_ADV = 0x08, |
| BATADV_UNICAST_4ADDR = 0x09, |
| }; |
| |
| /** |
| * enum batadv_subtype - packet subtype for unicast4addr |
| * @BATADV_P_DATA: user payload |
| * @BATADV_P_DAT_DHT_GET: DHT request message |
| * @BATADV_P_DAT_DHT_PUT: DHT store message |
| * @BATADV_P_DAT_CACHE_REPLY: ARP reply generated by DAT |
| */ |
| enum batadv_subtype { |
| BATADV_P_DATA = 0x01, |
| BATADV_P_DAT_DHT_GET = 0x02, |
| BATADV_P_DAT_DHT_PUT = 0x03, |
| BATADV_P_DAT_CACHE_REPLY = 0x04, |
| }; |
| |
| /* this file is included by batctl which needs these defines */ |
| #define BATADV_COMPAT_VERSION 14 |
| |
| enum batadv_iv_flags { |
| BATADV_NOT_BEST_NEXT_HOP = BIT(3), |
| BATADV_PRIMARIES_FIRST_HOP = BIT(4), |
| BATADV_VIS_SERVER = BIT(5), |
| BATADV_DIRECTLINK = BIT(6), |
| }; |
| |
| /* ICMP message types */ |
| enum batadv_icmp_packettype { |
| BATADV_ECHO_REPLY = 0, |
| BATADV_DESTINATION_UNREACHABLE = 3, |
| BATADV_ECHO_REQUEST = 8, |
| BATADV_TTL_EXCEEDED = 11, |
| BATADV_PARAMETER_PROBLEM = 12, |
| }; |
| |
| /* vis defines */ |
| enum batadv_vis_packettype { |
| BATADV_VIS_TYPE_SERVER_SYNC = 0, |
| BATADV_VIS_TYPE_CLIENT_UPDATE = 1, |
| }; |
| |
| /* fragmentation defines */ |
| enum batadv_unicast_frag_flags { |
| BATADV_UNI_FRAG_HEAD = BIT(0), |
| BATADV_UNI_FRAG_LARGETAIL = BIT(1), |
| }; |
| |
| /* TT_QUERY subtypes */ |
| #define BATADV_TT_QUERY_TYPE_MASK 0x3 |
| |
| enum batadv_tt_query_packettype { |
| BATADV_TT_REQUEST = 0, |
| BATADV_TT_RESPONSE = 1, |
| }; |
| |
| /* TT_QUERY flags */ |
| enum batadv_tt_query_flags { |
| BATADV_TT_FULL_TABLE = BIT(2), |
| }; |
| |
| /* BATADV_TT_CLIENT flags. |
| * Flags from BIT(0) to BIT(7) are sent on the wire, while flags from BIT(8) to |
| * BIT(15) are used for local computation only |
| */ |
| enum batadv_tt_client_flags { |
| BATADV_TT_CLIENT_DEL = BIT(0), |
| BATADV_TT_CLIENT_ROAM = BIT(1), |
| BATADV_TT_CLIENT_WIFI = BIT(2), |
| BATADV_TT_CLIENT_TEMP = BIT(3), |
| BATADV_TT_CLIENT_NOPURGE = BIT(8), |
| BATADV_TT_CLIENT_NEW = BIT(9), |
| BATADV_TT_CLIENT_PENDING = BIT(10), |
| }; |
| |
| /* claim frame types for the bridge loop avoidance */ |
| enum batadv_bla_claimframe { |
| BATADV_CLAIM_TYPE_CLAIM = 0x00, |
| BATADV_CLAIM_TYPE_UNCLAIM = 0x01, |
| BATADV_CLAIM_TYPE_ANNOUNCE = 0x02, |
| BATADV_CLAIM_TYPE_REQUEST = 0x03, |
| }; |
| |
| /* the destination hardware field in the ARP frame is used to |
| * transport the claim type and the group id |
| */ |
| struct batadv_bla_claim_dst { |
| uint8_t magic[3]; /* FF:43:05 */ |
| uint8_t type; /* bla_claimframe */ |
| __be16 group; /* group id */ |
| }; |
| |
| struct batadv_header { |
| uint8_t packet_type; |
| uint8_t version; /* batman version field */ |
| uint8_t ttl; |
| /* the parent struct has to add a byte after the header to make |
| * everything 4 bytes aligned again |
| */ |
| }; |
| |
| struct batadv_ogm_packet { |
| struct batadv_header header; |
| uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */ |
| __be32 seqno; |
| uint8_t orig[ETH_ALEN]; |
| uint8_t prev_sender[ETH_ALEN]; |
| uint8_t gw_flags; /* flags related to gateway class */ |
| uint8_t tq; |
| uint8_t tt_num_changes; |
| uint8_t ttvn; /* translation table version number */ |
| __be16 tt_crc; |
| } __packed; |
| |
| #define BATADV_OGM_HLEN sizeof(struct batadv_ogm_packet) |
| |
| struct batadv_icmp_packet { |
| struct batadv_header header; |
| uint8_t msg_type; /* see ICMP message types above */ |
| uint8_t dst[ETH_ALEN]; |
| uint8_t orig[ETH_ALEN]; |
| __be16 seqno; |
| uint8_t uid; |
| uint8_t reserved; |
| }; |
| |
| #define BATADV_RR_LEN 16 |
| |
| /* icmp_packet_rr must start with all fields from imcp_packet |
| * as this is assumed by code that handles ICMP packets |
| */ |
| struct batadv_icmp_packet_rr { |
| struct batadv_header header; |
| uint8_t msg_type; /* see ICMP message types above */ |
| uint8_t dst[ETH_ALEN]; |
| uint8_t orig[ETH_ALEN]; |
| __be16 seqno; |
| uint8_t uid; |
| uint8_t rr_cur; |
| uint8_t rr[BATADV_RR_LEN][ETH_ALEN]; |
| }; |
| |
| /* All packet headers in front of an ethernet header have to be completely |
| * divisible by 2 but not by 4 to make the payload after the ethernet |
| * header again 4 bytes boundary aligned. |
| * |
| * A packing of 2 is necessary to avoid extra padding at the end of the struct |
| * caused by a structure member which is larger than two bytes. Otherwise |
| * the structure would not fulfill the previously mentioned rule to avoid the |
| * misalignment of the payload after the ethernet header. It may also lead to |
| * leakage of information when the padding it not initialized before sending. |
| */ |
| #pragma pack(2) |
| |
| struct batadv_unicast_packet { |
| struct batadv_header header; |
| uint8_t ttvn; /* destination translation table version number */ |
| uint8_t dest[ETH_ALEN]; |
| /* "4 bytes boundary + 2 bytes" long to make the payload after the |
| * following ethernet header again 4 bytes boundary aligned |
| */ |
| }; |
| |
| /** |
| * struct batadv_unicast_4addr_packet - extended unicast packet |
| * @u: common unicast packet header |
| * @src: address of the source |
| * @subtype: packet subtype |
| */ |
| struct batadv_unicast_4addr_packet { |
| struct batadv_unicast_packet u; |
| uint8_t src[ETH_ALEN]; |
| uint8_t subtype; |
| uint8_t reserved; |
| /* "4 bytes boundary + 2 bytes" long to make the payload after the |
| * following ethernet header again 4 bytes boundary aligned |
| */ |
| }; |
| |
| struct batadv_unicast_frag_packet { |
| struct batadv_header header; |
| uint8_t ttvn; /* destination translation table version number */ |
| uint8_t dest[ETH_ALEN]; |
| uint8_t flags; |
| uint8_t align; |
| uint8_t orig[ETH_ALEN]; |
| __be16 seqno; |
| } __packed; |
| |
| struct batadv_bcast_packet { |
| struct batadv_header header; |
| uint8_t reserved; |
| __be32 seqno; |
| uint8_t orig[ETH_ALEN]; |
| /* "4 bytes boundary + 2 bytes" long to make the payload after the |
| * following ethernet header again 4 bytes boundary aligned |
| */ |
| }; |
| |
| #pragma pack() |
| |
| struct batadv_vis_packet { |
| struct batadv_header header; |
| uint8_t vis_type; /* which type of vis-participant sent this? */ |
| __be32 seqno; /* sequence number */ |
| uint8_t entries; /* number of entries behind this struct */ |
| uint8_t reserved; |
| uint8_t vis_orig[ETH_ALEN]; /* originator reporting its neighbors */ |
| uint8_t target_orig[ETH_ALEN]; /* who should receive this packet */ |
| uint8_t sender_orig[ETH_ALEN]; /* who sent or forwarded this packet */ |
| }; |
| |
| struct batadv_tt_query_packet { |
| struct batadv_header header; |
| /* the flag field is a combination of: |
| * - TT_REQUEST or TT_RESPONSE |
| * - TT_FULL_TABLE |
| */ |
| uint8_t flags; |
| uint8_t dst[ETH_ALEN]; |
| uint8_t src[ETH_ALEN]; |
| /* the ttvn field is: |
| * if TT_REQUEST: ttvn that triggered the |
| * request |
| * if TT_RESPONSE: new ttvn for the src |
| * orig_node |
| */ |
| uint8_t ttvn; |
| /* tt_data field is: |
| * if TT_REQUEST: crc associated with the |
| * ttvn |
| * if TT_RESPONSE: table_size |
| */ |
| __be16 tt_data; |
| } __packed; |
| |
| struct batadv_roam_adv_packet { |
| struct batadv_header header; |
| uint8_t reserved; |
| uint8_t dst[ETH_ALEN]; |
| uint8_t src[ETH_ALEN]; |
| uint8_t client[ETH_ALEN]; |
| } __packed; |
| |
| struct batadv_tt_change { |
| uint8_t flags; |
| uint8_t addr[ETH_ALEN]; |
| } __packed; |
| |
| #endif /* _NET_BATMAN_ADV_PACKET_H_ */ |