|
RawSocket
provides you with the tools
that allow you to send and receive raw data to/from an IP address,
as well as listen for inbound TCP or UDP connections on any local
port. It is useful in troubleshooting different networking services
and understanding application-level protocols, such as POP, SMTP,
or DAYTIME. The sample screen shot displays an HTTP session that
you can establish using this tool:
Connect
To connect to a remote host,
enter an IP address or hostname, select a destination port, and
click Connect.
Once the connection is established, you can enter any data in
the Data input field and click the
Send
button to send the data to the
remote host. When sending data, you can toggle the characters used
as a string delimiter: Line Feed (0x0A), Carriage Return + Line
Feed (0x0D0A), or no delimiter at all. To send arbitrary characters
(including non-printable ones), use [xx] structures, where xx is
the hexadecimal code of the character being sent. For instance, the
structure [48]ELLO will be translated into HELLO, as the ASCII code
of the 'H' character is 0x48. The data being sent is shown in blue;
the data being received is shown in red.
Listen
To listen for incoming
connections, select a local port and click Listen.
If a remote host connects to your PC, the information about that
connection will be displayed in the window. If the remote host
starts sending data to the open local port, the data being sent
will be shown in red. You can send data to the remote host as
described above. Your data will be shown in blue. To close the
local port, click on the Hang Up
button.
The information above applies
to both RawTCP
and RawUDP,
with the only exception: Since UDP is a stateless, connectionless
protocol; there is no Connect
button in RawUDP.
To send UDP data, you don't need to establish a connection. Rather,
you just need to send the data out.
|
