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Diffstat (limited to 'net/batman-adv/packet.h')
| -rw-r--r-- | net/batman-adv/packet.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h new file mode 100644 index 00000000..441f3db1 --- /dev/null +++ b/net/batman-adv/packet.h @@ -0,0 +1,207 @@ +/* + * 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 ETH_P_BATMAN 0x4305 /* unofficial/not registered Ethertype */ + +enum bat_packettype { + BAT_OGM = 0x01, + BAT_ICMP = 0x02, + BAT_UNICAST = 0x03, + BAT_BCAST = 0x04, + BAT_VIS = 0x05, + BAT_UNICAST_FRAG = 0x06, + BAT_TT_QUERY = 0x07, + BAT_ROAM_ADV = 0x08 +}; + +/* this file is included by batctl which needs these defines */ +#define COMPAT_VERSION 14 + +enum batman_flags { + PRIMARIES_FIRST_HOP = 1 << 4, + VIS_SERVER = 1 << 5, + DIRECTLINK = 1 << 6 +}; + +/* ICMP message types */ +enum icmp_packettype { + ECHO_REPLY = 0, + DESTINATION_UNREACHABLE = 3, + ECHO_REQUEST = 8, + TTL_EXCEEDED = 11, + PARAMETER_PROBLEM = 12 +}; + +/* vis defines */ +enum vis_packettype { + VIS_TYPE_SERVER_SYNC = 0, + VIS_TYPE_CLIENT_UPDATE = 1 +}; + +/* fragmentation defines */ +enum unicast_frag_flags { + UNI_FRAG_HEAD = 1 << 0, + UNI_FRAG_LARGETAIL = 1 << 1 +}; + +/* TT_QUERY subtypes */ +#define TT_QUERY_TYPE_MASK 0x3 + +enum tt_query_packettype { + TT_REQUEST = 0, + TT_RESPONSE = 1 +}; + +/* TT_QUERY flags */ +enum tt_query_flags { + TT_FULL_TABLE = 1 << 2 +}; + +/* TT_CLIENT flags. + * Flags from 1 to 1 << 7 are sent on the wire, while flags from 1 << 8 to + * 1 << 15 are used for local computation only */ +enum tt_client_flags { + TT_CLIENT_DEL = 1 << 0, + TT_CLIENT_ROAM = 1 << 1, + TT_CLIENT_WIFI = 1 << 2, + TT_CLIENT_NOPURGE = 1 << 8, + TT_CLIENT_NEW = 1 << 9, + TT_CLIENT_PENDING = 1 << 10 +}; + +struct batman_header { + uint8_t packet_type; + uint8_t version; /* batman version field */ + uint8_t ttl; +} __packed; + +struct batman_ogm_packet { + struct batman_header header; + uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */ + uint32_t seqno; + uint8_t orig[6]; + uint8_t prev_sender[6]; + uint8_t gw_flags; /* flags related to gateway class */ + uint8_t tq; + uint8_t tt_num_changes; + uint8_t ttvn; /* translation table version number */ + uint16_t tt_crc; +} __packed; + +#define BATMAN_OGM_LEN sizeof(struct batman_ogm_packet) + +struct icmp_packet { + struct batman_header header; + uint8_t msg_type; /* see ICMP message types above */ + uint8_t dst[6]; + uint8_t orig[6]; + uint16_t seqno; + uint8_t uid; + uint8_t reserved; +} __packed; + +#define BAT_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 icmp_packet_rr { + struct batman_header header; + uint8_t msg_type; /* see ICMP message types above */ + uint8_t dst[6]; + uint8_t orig[6]; + uint16_t seqno; + uint8_t uid; + uint8_t rr_cur; + uint8_t rr[BAT_RR_LEN][ETH_ALEN]; +} __packed; + +struct unicast_packet { + struct batman_header header; + uint8_t ttvn; /* destination translation table version number */ + uint8_t dest[6]; +} __packed; + +struct unicast_frag_packet { + struct batman_header header; + uint8_t ttvn; /* destination translation table version number */ + uint8_t dest[6]; + uint8_t flags; + uint8_t align; + uint8_t orig[6]; + uint16_t seqno; +} __packed; + +struct bcast_packet { + struct batman_header header; + uint8_t reserved; + uint32_t seqno; + uint8_t orig[6]; +} __packed; + +struct vis_packet { + struct batman_header header; + uint8_t vis_type; /* which type of vis-participant sent this? */ + uint32_t seqno; /* sequence number */ + uint8_t entries; /* number of entries behind this struct */ + uint8_t reserved; + uint8_t vis_orig[6]; /* originator that announces its neighbors */ + uint8_t target_orig[6]; /* who should receive this packet */ + uint8_t sender_orig[6]; /* who sent or rebroadcasted this packet */ +} __packed; + +struct tt_query_packet { + struct batman_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 */ + uint16_t tt_data; +} __packed; + +struct roam_adv_packet { + struct batman_header header; + uint8_t reserved; + uint8_t dst[ETH_ALEN]; + uint8_t src[ETH_ALEN]; + uint8_t client[ETH_ALEN]; +} __packed; + +struct tt_change { + uint8_t flags; + uint8_t addr[ETH_ALEN]; +} __packed; + +#endif /* _NET_BATMAN_ADV_PACKET_H_ */ |