public void dispatch_in_msg(ref xbs_udp_message udp_msg)
{
xbs_node tmp_node = null;
xbs_node sending_node = node_list.findNode(udp_msg.src_ip, udp_msg.src_port);
# if DEBUG
if (udp_msg.msg_type != xbs_node_message_type.PING && udp_msg.msg_type != xbs_node_message_type.PONG)
{
String str_send_node = (sending_node == null) ? udp_msg.src_ip + ":" + udp_msg.src_port : sending_node.ToString() + " " + sending_node.nickname;
//xbs_messages.addDebugMessage(" * IN " + udp_msg.msg_type + " " + str_send_node, xbs_message_sender.UDP_LISTENER);
}
# endif
switch (udp_msg.msg_type)
{
case xbs_node_message_type.DATA:
dispatch_DATA_message(ref udp_msg, ref sending_node);
break;
case xbs_node_message_type.ANNOUNCE:
xbs_node_message_announce msg_announce = new xbs_node_message_announce(udp_msg.data);
tmp_node = new xbs_node(udp_msg.src_ip, udp_msg.src_port);
#if DEBUG
StringBuilder options_string = new StringBuilder();
foreach (KeyValuePair<string, string> item in msg_announce.getAllOptions())
options_string.Append(item.Key + "=" + item.Value + " ; ");
xbs_messages.addDebugMessage(" * IN ANNOUCE: " + tmp_node + " | options: " + options_string.ToString(), xbs_message_sender.UDP_LISTENER);
#endif
bool send_packet = true;
if (msg_announce.hasOption(xbs_node_message_announce.OPTION_CLOUDNAME))
if (!msg_announce.getOption(xbs_node_message_announce.OPTION_CLOUDNAME).Equals(xbs_cloudlist.getInstance().current_cloudname))
send_packet = false;
if (send_packet)
tmp_node.sendAddNodeMessage(node_list.local_node);
break;
case xbs_node_message_type.KNOWNNODE:
xbs_node_message_knownnode msg_knownnode = new xbs_node_message_knownnode(udp_msg.data);
// only accept KNOWNNODE messages when not part of a cloud
if (!xbs_cloudlist.getInstance().part_of_cloud)
{
tmp_node = node_list.findNode(msg_knownnode.ip, msg_knownnode.port);
if (tmp_node == null)
{
tmp_node = new xbs_node(msg_knownnode.ip, msg_knownnode.port);
#if DEBUG
xbs_messages.addDebugMessage(" * trying to add known node: " + tmp_node, xbs_message_sender.UDP_LISTENER);
#endif
node_list.tryAddingNode(tmp_node, xbs_cloudlist.getInstance().current_cloudname);
}
#if DEBUG
else
xbs_messages.addDebugMessage(" * already in contact with node: " + tmp_node, xbs_message_sender.UDP_LISTENER);
#endif
}
break;
case xbs_node_message_type.ADDNODE:
xbs_node_message_addnode msg_addnode = new xbs_node_message_addnode(udp_msg.data);
# if DEBUG
xbs_messages.addDebugMessage(" * received ADDNODE from " + udp_msg.src_ip + ":" + udp_msg.src_port + " for " + msg_addnode.ip + ":" + msg_addnode.port, xbs_message_sender.UDP_LISTENER);
# endif
if (sending_node == null)
{ // node not known, add to nodelist
tmp_node = node_list.addNode(msg_addnode.ip, msg_addnode.port, udp_msg.src_ip, udp_msg.src_port);
tmp_node.sendAddNodeMessage(node_list.local_node);
if (!xbs_cloudlist.getInstance().part_of_cloud)
node_list.sendNodeListToNode(tmp_node);
}
break;
case xbs_node_message_type.DELNODE:
xbs_node_message_delnode msg_delnode = new xbs_node_message_delnode(udp_msg.data);
# if DEBUG
xbs_messages.addDebugMessage(" * received DELNODE from " + udp_msg.src_ip + ":" + udp_msg.src_port + " for " + msg_delnode.ip + ":" + msg_delnode.port, xbs_message_sender.UDP_LISTENER);
# endif
try
{
tmp_node = node_list.delNode(udp_msg.src_ip, (UInt16)udp_msg.src_port);
}
catch (Exception ex)
{
xbs_messages.addInfoMessage("!! error on deleting node: " + ex.Message, xbs_message_sender.UDP_LISTENER, xbs_message_type.ERROR);
}
if (tmp_node != null && xbs_chat.message_when_nodes_join_or_leave)
xbs_chat.addSystemMessage(tmp_node.nickname + " left.");
break;
case xbs_node_message_type.PING:
tmp_node = (sending_node != null) ? sending_node : new xbs_node(udp_msg.src_ip, udp_msg.src_port);
xbs_node_message_pong msg_pong = new xbs_node_message_pong(tmp_node, udp_msg.data);
tmp_node.sendNodeMessage(msg_pong);
break;
case xbs_node_message_type.PONG:
if (sending_node != null)
{
sending_node.pong(xbs_node_message_pong.getDelay(udp_msg.data).Milliseconds);
node_list.listHasJustChanged();
}
break;
case xbs_node_message_type.GETNODELIST:
tmp_node = (sending_node != null) ? sending_node : new xbs_node(udp_msg.src_ip, udp_msg.src_port);
node_list.sendNodeListToNode(tmp_node);
break;
case xbs_node_message_type.GETCLIENTVERSION:
tmp_node = (sending_node != null) ? sending_node : new xbs_node(udp_msg.src_ip, udp_msg.src_port);
xbs_node_message_clientversion msg_gcv = new xbs_node_message_clientversion(tmp_node, xbs_settings.xbslink_version);
tmp_node.sendNodeMessage(msg_gcv);
break;
case xbs_node_message_type.CLIENTVERSION:
if (sending_node != null)
{
xbs_node_message_clientversion msg_cv = new xbs_node_message_clientversion(udp_msg.data);
sending_node.client_version = msg_cv.version_string;
node_list.listHasJustChanged();
}
break;
case xbs_node_message_type.CHATMSG:
if (sending_node != null)
{
xbs_node_message_chatmsg msg_chat = new xbs_node_message_chatmsg(udp_msg.data);
xbs_chat.addChatMessage(sending_node.nickname, msg_chat.getChatMessage());
}
break;
case xbs_node_message_type.NICKNAME:
if (sending_node != null)
{
xbs_node_message_nickname msg_nick = new xbs_node_message_nickname(udp_msg.data);
sending_node.nickname = msg_nick.getNickname();
sending_node.nickname_received = true;
node_list.listHasJustChanged();
if ( xbs_chat.message_when_nodes_join_or_leave )
xbs_chat.addSystemMessage(sending_node.nickname + " joined.");
}
break;
case xbs_node_message_type.GETNICKNAME:
tmp_node = (sending_node!=null) ? sending_node : new xbs_node(udp_msg.src_ip, udp_msg.src_port);
xbs_node_message_nickname msg_snick = new xbs_node_message_nickname(tmp_node, node_list.local_node.nickname);
tmp_node.sendNodeMessage(msg_snick);
break;
case xbs_node_message_type.SERVERHELLO:
lock (_locker_HELLO)
{
xbs_upnp.isPortReachable = true;
Monitor.PulseAll(_locker_HELLO);
}
break;
case xbs_node_message_type.TO_CLOUDHELPER_HELPWITHNODE:
xbs_node_message_toCloudHelper_HelpWithNode msg_toCloudHelpWith = new xbs_node_message_toCloudHelper_HelpWithNode(udp_msg.data);
node_list.cloudhelper_helpWithNode(udp_msg.src_ip, udp_msg.src_port, msg_toCloudHelpWith.ip, msg_toCloudHelpWith.port);
break;
case xbs_node_message_type.FROM_CLOUDHELPER_CONTACTNODE:
xbs_node_message_fromCloudHelper_ContactNode msg_fromCloudContactNode = new xbs_node_message_fromCloudHelper_ContactNode(udp_msg.data);
tmp_node = new xbs_node(msg_fromCloudContactNode.ip, msg_fromCloudContactNode.port);
node_list.tryAddingNode(tmp_node, xbs_cloudlist.getInstance().current_cloudname);
break;
}
if (sending_node != null)
sending_node.statistics.receivedPacket((uint)udp_msg.data_len + xbs_udp_message.HEADER_LENGTH);
}
private void dispatch_DATA_message(ref xbs_udp_message udp_msg, ref xbs_node sending_node)
{
if (xbs_sniffer.getInstance() == null)
return;
byte[] src_mac = new byte[6];
byte[] dst_mac = new byte[6];
Buffer.BlockCopy(udp_msg.data, 0, dst_mac, 0, 6);
PhysicalAddress dstMAC = new PhysicalAddress(dst_mac);
Buffer.BlockCopy(udp_msg.data, 6, src_mac, 0, 6);
PhysicalAddress srcMAC = new PhysicalAddress(src_mac);
#if DEBUG
//xbs_messages.addDebugMessage(" * DATA (" + udp_msg.data.Length + ") | " + srcMAC + " => " + dstMAC, xbs_message_sender.UDP_LISTENER);
#endif
xbs_sniffer.getInstance().injectRemotePacket(ref udp_msg.data, dstMAC, srcMAC, ref sending_node);
}
public void udp_receiver()
{
xbs_messages.addInfoMessage(" * udp receiver thread started", xbs_message_sender.UDP_LISTENER);
byte[] data = new byte[2048];
IPEndPoint remote_endpoint = new IPEndPoint(IPAddress.Any, 0);
EndPoint ep = (EndPoint)remote_endpoint;
int bytes_received = 0;
xbs_udp_message msg = null;
#if !DEBUG
try
{
#endif
while (!exiting)
{
try
{
bytes_received = udp_socket.ReceiveFrom(data, ref ep);
}
catch (SocketException)
{
bytes_received = 0;
}
if (!exiting && bytes_received > 0)
{
xbs_node_message_type command = xbs_node_message.getMessageTypeFromUDPPacket(data);
msg = new xbs_udp_message();
msg.msg_type = command;
if (bytes_received > 3)
{
msg.data_len = xbs_node_message.getDataLengthFromUDPPacket(data);
if (msg.data_len + sizeof(UInt16) + sizeof(xbs_node_message_type) == bytes_received)
{
msg.data = new byte[msg.data_len];
Buffer.BlockCopy(data, xbs_udp_message.HEADER_LENGTH, msg.data, 0, msg.data_len);
}
else
{
#if DEBUG
xbs_messages.addInfoMessage("received packet with wrong length! expected " + msg.data_len + " but got " + (bytes_received - sizeof(UInt16) - sizeof(xbs_node_message_type)) + " bytes.", xbs_message_sender.UDP_LISTENER, xbs_message_type.ERROR);
#endif
msg = null;
}
}
else
msg.data_len = 0;
if (msg != null)
{
remote_endpoint = (IPEndPoint)ep;
msg.src_ip = remote_endpoint.Address;
msg.src_port = remote_endpoint.Port;
lock (_locker)
{
if (command == xbs_node_message_type.DATA)
lock (in_msgs_high_prio)
in_msgs_high_prio.Enqueue(msg);
else
lock (in_msgs)
in_msgs.Enqueue(msg);
Monitor.PulseAll(_locker);
}
}
}
}
#if !DEBUG
}
catch (Exception ex)
{
ExceptionMessage.ShowExceptionDialog("udp_receiver service", ex);
}
#endif
#if DEBUG
xbs_messages.addDebugMessage(" * udp receiver thread stopped", xbs_message_sender.UDP_LISTENER);
#endif
}
