4 * uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full
5 * featured implementation uAnytun has no support for multiple connections
6 * or synchronisation. It is a small single threaded implementation intended
7 * to act as a client on small platforms.
8 * The secure anycast tunneling protocol (satp) defines a protocol used
9 * for communication between any combination of unicast and anycast
10 * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
11 * mode and allows tunneling of every ETHER TYPE protocol (e.g.
12 * ethernet, ip, arp ...). satp directly includes cryptography and
13 * message authentication based on the methodes used by SRTP. It is
14 * intended to deliver a generic, scaleable and secure solution for
15 * tunneling and relaying of packets of any protocol.
18 * Copyright (C) 2007-2010 Christian Pointner <equinox@anytun.org>
20 * This file is part of uAnytun.
22 * uAnytun is free software: you can redistribute it and/or modify
23 * it under the terms of the GNU General Public License as published by
24 * the Free Software Foundation, either version 3 of the License, or
27 * uAnytun is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 * GNU General Public License for more details.
32 * You should have received a copy of the GNU General Public License
33 * along with uAnytun. If not, see <http://www.gnu.org/licenses/>.
36 #ifndef UANYTUN_encrypted_packet_h_INCLUDED
37 #define UANYTUN_encrypted_packet_h_INCLUDED
39 #define ENCRYPTED_PACKET_SIZE_MAX 1600
41 #define PAYLOAD_TYPE_TAP 0x6558
42 #define PAYLOAD_TYPE_TUN 0x0000
43 #define PAYLOAD_TYPE_TUN4 0x0800
44 #define PAYLOAD_TYPE_TUN6 0x86DD
46 struct __attribute__ ((__packed__)) encrypted_packet_header_struct {
48 sender_id_t sender_id_;
51 typedef struct encrypted_packet_header_struct encrypted_packet_header_t;
53 struct encrypted_packet_struct {
54 u_int32_t payload_length_;
55 u_int32_t auth_tag_length_;
56 union __attribute__ ((__packed__)) {
57 u_int8_t buf_[ENCRYPTED_PACKET_SIZE_MAX];
58 encrypted_packet_header_t header_;
61 typedef struct encrypted_packet_struct encrypted_packet_t;
63 void encrypted_packet_init(encrypted_packet_t* packet, u_int32_t auth_tag_length);
65 u_int32_t encrypted_packet_get_minimum_length(encrypted_packet_t* packet);
67 u_int8_t* encrypted_packet_get_packet(encrypted_packet_t* packet);
68 u_int32_t encrypted_packet_get_length(encrypted_packet_t* packet);
69 void encrypted_packet_set_length(encrypted_packet_t* packet, u_int32_t len);
71 u_int8_t* encrypted_packet_get_payload(encrypted_packet_t* packet);
72 u_int32_t encrypted_packet_get_payload_length(encrypted_packet_t* packet);
73 void encrypted_packet_set_payload_length(encrypted_packet_t* packet, u_int32_t len);
75 u_int8_t* encrypted_packet_get_auth_portion(encrypted_packet_t* packet);
76 u_int32_t encrypted_packet_get_auth_portion_length(encrypted_packet_t* packet);
78 u_int8_t* encrypted_packet_get_auth_tag(encrypted_packet_t* packet);
79 u_int32_t encrypted_packet_get_auth_tag_length(encrypted_packet_t* packet);
81 seq_nr_t encrypted_packet_get_seq_nr(encrypted_packet_t* packet);
82 void encrypted_packet_set_seq_nr(encrypted_packet_t* packet, seq_nr_t seq_nr);
84 sender_id_t encrypted_packet_get_sender_id(encrypted_packet_t* packet);
85 void encrypted_packet_set_sender_id(encrypted_packet_t* packet, sender_id_t sender_id);
87 mux_t encrypted_packet_get_mux(encrypted_packet_t* packet);
88 void encrypted_packet_set_mux(encrypted_packet_t* packet, mux_t mux);