Readme + define for WIN32

AUTHORS

@@ -2,3 +2,4 @@ Olivier Dembour <[email protected]>
 
 Contributors :
 Nicolas Collignon <[email protected]>
+@kirik_wow (kirillwow)

README.md

@@ -1,11 +1,28 @@
 
 # Note
 
-Dns2tcp is a tool for relaying TCP connections over DNS. There is only
+Dns2tcp is a tool for TCP port forwarding over DNS. There is only
 a simple identification mecanism but no encryption : DNS encapsulation
 must be considered as an unsecure and anonymous transport
-layer. Resources should be public external services like ssh,
-ssltunnel ...  
+layer. It works similar to plink -L/-R options.
+It is based on old version of dns2tcp at https://github.com/alex-sector/dns2tcp
+with addition of port forwarding feature, bug fix and moving from b64 to b32.
+
+## How to build
+
+### Linux
+
+	$ ./configure
+	$ make
+	$ ./server/dns2tcpd
+	$ ./client/dns2tcpc
+
+
+### Windows
+
+	$ cd dns2tcp/client
+	$ "C:\Program Files\mingw-w64\x86_64-8.1.0-win32-seh-rt_v6-rev0\mingw64\bin\gcc.exe" -I ..\common\includes -I includes *.c ..\common\*.c -l ws2_32 -l iphlpapi -o dns2tcpc.exe
+	$ dns2tcpc.exe
 
 
 ## Examples
@@ -14,59 +31,47 @@ ssltunnel ...
 ### Client:
 
 
-View list of available connection.
-```sh
-	$ dns2tcpc -z dns2tcp.hsc.fr -k <my-key>  <dns_server>
-	Available connection(s) :
-	        ssh-gw
-	        ssh6-home
-	        ssl-tunnel
-	$
-```
-Line based connection to a remote ssl-tunnel host :
+Local port forwarding, for example to run meterpreter over DNS tunnel.
+Listens to port 4444 on client side and forwards all connections to x.x.x.x:443 :
 ```sh
-	$ dns2tcpc -r ssl-tunnel -l 4430 -k <my-key> -z dns2tcp._hsc.fr <dns_server>
-	listening on port 4430
+	$ dns2tcpc.exe -z mydomain.com -k secretkey -t 3 -L 4444:x.x.x.x:443 <dns_server>
+	listening on port 4444
 	...
 
 ```
-File configuration :
+
+
+Remote port forwarding, for example to make client SMB shares available to remote side.
+Opens port 1500 for listening on server side and forwards all connections from remote to 127.0.0.1:445 :
 ```sh
-	$ cat > ~/.dns2tcprc << EOF
-	
-	domain = dns2tcp.hsc.fr
-	resource = ssl-tunnel
-	local_port = 4430
-	debug_level = 1
-	key = whateveryouwant
-	server = the_dns_server # or scan /etc/resolv.conf
-	EOF
-	$ dns2tcpc
+        $ dns2tcpc.exe -z mydomain.com -k secretkey -t 3 -R 1500:127.0.0.1:445 <dns_server>
+        Connected to port : 445
+        ...
+
 ```
 
-### Server :
 
 File configuration :
 
+### Server :
+
 ```sh
-	$ cat > ~/.dns2tcpdrc << EOF
+	# cat > .dns2tcpdrc << EOF
 
-	listen = x.x.x.x
+	listen = *server ip address*
 	port = 53
 	user = nobody
-	key = whateveryouwant
+	key = secretkey
 	chroot = /var/empty/dns2tcp/
-	domain = dns2tcp.hsc.fr
-	resources = ssh:127.0.0.1:22 ,          smtp:127.0.0.1:25,
-	                pop3:10.0.0.1:110, ssh2:[fe80::1664]:22
-	
+	domain = mydomain.com
+
 	EOF
-	$ ./dns2tcpd -F -d 1
+
+	# server/dns2tcpd -F -d3 -f .dns2tcpdrc	
 
 ```
 
 # Known Bugs
 
-DNS desynchronisation
 dns2tcpd server not supported on Windows
 

client/client.c

@@ -290,7 +290,10 @@ static int	check_incoming_ns_reply(t_conf *conf)
 	buffer[MAX_EDNS_LEN] = 0;
 
   /* Can be blocking here */
+
+#ifdef _WIN32
 	ResetEvent(conf->event_udp);
+#endif
 	while ((len = read(conf->sd_udp, buffer, MAX_DNS_LEN)) > 0)
     {
 		if ((conf->client) && (queue_get_udp_data(conf, buffer, len)))