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Diffstat (limited to 'src/encrypted_packet.h')
| -rw-r--r-- | src/encrypted_packet.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/encrypted_packet.h b/src/encrypted_packet.h new file mode 100644 index 0000000..f2011a0 --- /dev/null +++ b/src/encrypted_packet.h @@ -0,0 +1,80 @@ +/* + * ľAnytun + * + * ľAnytun is a tiny implementation of SATP. Unlike Anytun which is a full + * featured implementation ľAnytun has no support for multiple connections + * or synchronisation. It is a small single threaded implementation intended + * to act as a client on small platforms. + * The secure anycast tunneling protocol (satp) defines a protocol used + * for communication between any combination of unicast and anycast + * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel + * mode and allows tunneling of every ETHER TYPE protocol (e.g. + * ethernet, ip, arp ...). satp directly includes cryptography and + * message authentication based on the methodes used by SRTP. It is + * intended to deliver a generic, scaleable and secure solution for + * tunneling and relaying of packets of any protocol. + * + * + * Copyright (C) 2007-2008 Christian Pointner <equinox@anytun.org> + * + * This file is part of ľAnytun. + * + * ľAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * ľAnytun 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 ľAnytun. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef _ENCRYPTED_PACKET_H_ +#define _ENCRYPTED_PACKET_H_ + +#define ENCRYPTED_PACKET_SIZE_MAX 1600 + +#define PAYLOAD_TYPE_TAP 0x6558 +#define PAYLOAD_TYPE_TUN 0x0000 +#define PAYLOAD_TYPE_TUN4 0x0800 +#define PAYLOAD_TYPE_TUN6 0x86DD + +struct __attribute__ ((__packed__)) encrypted_packet_header_struct { + seq_nr_t seq_nr_; + sender_id_t sender_id_; + mux_t mux_; +}; +typedef struct encrypted_packet_header_struct encrypted_packet_header_t; + +struct encrypted_packet_struct { + u_int32_t payload_length_; + union __attribute__ ((__packed__)) { + u_int8_t buf_[ENCRYPTED_PACKET_SIZE_MAX]; + encrypted_packet_header_t header_; + } data_; +}; +typedef struct encrypted_packet_struct encrypted_packet_t; + +void encrypted_packet_init(encrypted_packet_t* packet); + +u_int8_t* encrypted_packet_get_packet(encrypted_packet_t* packet); +u_int32_t encrypted_packet_get_length(encrypted_packet_t* packet); + +u_int8_t* encrypted_packet_get_payload(encrypted_packet_t* packet); +u_int32_t encrypted_packet_get_payload_length(encrypted_packet_t* packet); +void encrypted_packet_set_payload_length(encrypted_packet_t* packet, u_int32_t len); + +seq_nr_t encrypted_packet_get_seq_nr(encrypted_packet_t* packet); +void encrypted_packet_set_seq_nr(encrypted_packet_t* packet, seq_nr_t seq_nr); + +sender_id_t encrypted_packet_get_sender_id(encrypted_packet_t* packet); +void encrypted_packet_set_sender_id(encrypted_packet_t* packet, sender_id_t sender_id); + +mux_t encrypted_packet_get_mux(encrypted_packet_t* packet); +void encrypted_packet_set_mux(encrypted_packet_t* packet, mux_t mux); + + +#endif |