what is valid range of port number to use sockaddr_in?

[vjshankwar]

hi all,

i m use sockaddr_in to cocket connection.

is there any valid range of pot number to establish connection or i can use any port number for connection.

please help me for this.

thanks in advance.

[emailus]

Hmmm, I would definitely love to hear some thoughts from everyone too. I guess is, you can not connect to an arbitrary port number. But ideas would still be more benefitial and worthy learning at best. Thank you.

[cilu]

You can use any port number that is not used by other application. Here is a list of known ports: http://en.wikipedia.org/wiki/List_of...P_port_numbers.

BTW, it should be possible for your application to change the port number, at least have a set of available ports that can be switched between.

[0xC0000005]

The field is an unsigned short so the range is 0-65535 subject to port availability as suggested in the list above. Note that lists like this are only a very general guideline since the majority of these applications will not be in use on a typical computer and virtually any port (save for a very few common ones) that is available can be used.

You should also note that a port number is irrelevant if you are creating a client socket as one will be assigned to your connection automatically. It's only important if you are creating a server as you will need to use an available port to listen for incoming connections.

[Codeplug]

You should only use non-ephemeral ports: http://en.wikipedia.org/wiki/Ephemeral_ports
>> The IANA suggests 49152 to 65535 as "dynamic and/or private ports."

gg