USAGE:
    udptun [FLAGS] [OPTIONS]

FLAGS:
    -h, --help                 Prints help information
    -4                         Exclusively use IPv4
    -6                         Exclusively use IPv6
    -L, --log-data             Print a log line per data packet transferred
    -B, --print-data-buffer    Print the contents of the data buffer for each packet transferred
    -v, --verbose              Print more information
    -V, --version              Prints version information

OPTIONS:
    -b, --bufsize <SIZE>                 Packet buffer size, if smaller than packets sent they will get truncated
                                         [default: 65536]
    -E, --entry <ADDRESS>                Specifies that this is the tunnel entry point; the specified address is the one
                                         clients connect to
    -f, --format <FORMAT>                Set the log line format
    -l, --listen <ADDRESS>               The address/port to use for communication inside the tunnel
    -r, --remote <ADDRESS>               Specifies the address of the other end of the tunnel
        --source-format <ADDRESS-FMT>    Specifies the IP address range for created dummy client sockets
    -T, --target <ADDRESS>               Specifies that this is the end of the tunnel the actual server is at; the
                                         specified address is the one of the actual server to proxy
    -x, --timeout <SECS>                 Time in seconds after the last received packet after which a connection is
                                         determined closed [default: 3600]

                                      tunneled connection
                                      (can be established
                .----------.            by either side*)
               /            \                  |                    .------ Client
              /              \                 v                   /
 Target server -------------- udptun -T ================ udptun -E -------- Client
 (not neces-  \              / (--target)                (--entry) \
  sarily acces-\            /                                       *------ Client
  sible by the  *----------*                                                  ^
  clients)           ^                                                        |
                     |                                                clients connected
            one connection per                                       to tunnel entrypoint
            client connected to
             tunnel entrypoint

*: the side that establishes the connection is the one that does not use the --listen flag,
   remote tunnel address specified by --remote
   note: this is seperate from --target/--entry!