1 files changed, 139 insertions, 0 deletions

diff --git a/src/encrypted_packet.c b/src/encrypted_packet.c
new file mode 100644
index 0000000..7be3cd5
--- /dev/null
+++ b/src/encrypted_packet.c
@@ -0,0 +1,139 @@
+/*
+ *  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/>.
+ */
+
+#include "datatypes.h"
+
+#include "encrypted_packet.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+void encrypted_packet_init(encrypted_packet_t* packet)
+{
+  if(!packet)
+    return;
+
+  memset (packet, 0, sizeof(*packet));
+}
+
+u_int8_t* encrypted_packet_get_packet(encrypted_packet_t* packet)
+{
+  if(!packet)
+    return NULL;
+
+  return packet->data_.buf_;
+}
+
+u_int32_t encrypted_packet_get_length(encrypted_packet_t* packet)
+{
+  if(!packet)
+    return 0;
+
+  return (packet->payload_length_ + sizeof(encrypted_packet_header_t));
+}
+
+u_int8_t* encrypted_packet_get_payload(encrypted_packet_t* packet)
+{
+  if(!packet)
+    return NULL;
+
+  return (packet->data_.buf_ + sizeof(encrypted_packet_header_t));
+}
+
+u_int32_t encrypted_packet_get_payload_length(encrypted_packet_t* packet)
+{
+  if(!packet)
+    return 0;
+
+  return packet->payload_length_;
+}
+
+void encrypted_packet_set_payload_length(encrypted_packet_t* packet, u_int32_t len)
+{
+  if(!packet)
+    return;
+
+  if(len > ENCRYPTED_PACKET_SIZE_MAX || (len + sizeof(encrypted_packet_header_t)) > ENCRYPTED_PACKET_SIZE_MAX)
+    len = ENCRYPTED_PACKET_SIZE_MAX - sizeof(encrypted_packet_header_t);
+
+  packet->payload_length_ = len;
+}
+
+seq_nr_t encrypted_packet_get_seq_nr(encrypted_packet_t* packet)
+{
+  if(!packet)
+    return 0;
+
+  return SEQ_NR_T_NTOH(packet->data_.header_.seq_nr_);
+}
+
+void encrypted_packet_set_seq_nr(encrypted_packet_t* packet, seq_nr_t seq_nr)
+{
+  if(!packet)
+    return;
+
+  packet->data_.header_.seq_nr_ = SEQ_NR_T_HTON(seq_nr);
+}
+
+sender_id_t encrypted_packet_get_sender_id(encrypted_packet_t* packet)
+{
+  if(!packet)
+    return 0;
+
+  return SENDER_ID_T_NTOH(packet->data_.header_.sender_id_);
+}
+
+void encrypted_packet_set_sender_id(encrypted_packet_t* packet, sender_id_t sender_id)
+{
+  if(!packet)
+    return;
+
+  packet->data_.header_.sender_id_ = SENDER_ID_T_HTON(sender_id);
+}
+
+mux_t encrypted_packet_get_mux(encrypted_packet_t* packet)
+{
+  if(!packet)
+    return 0;
+  
+  return MUX_T_NTOH(packet->data_.header_.mux_);
+}
+
+void encrypted_packet_set_mux(encrypted_packet_t* packet, mux_t mux)
+{
+  if(!packet)
+    return;
+
+  packet->data_.header_.mux_ = MUX_T_HTON(mux);
+}