Raw Sockets 2

[ForeverCode]

I'm using raw sockets and when I pull the originating and destination port out of the packet(TCP/IP layer) I'm not getting the right port. I can't find if they are integers or what. All I can find is that they are 16 bits long.

http://www.protocols.com/pbook/tcpip.htm#TCP

Can anyone help me figure out how to get the port data into integers I can display?

-Micah

 

[ForeverCode]

Oh...I got it. Use htons()

 

[apatterno]

Yes, you got it. You should also probably use htons or htonl every time you intend to write a 16-bit or 32-bit word, respectively, and ntohs or ntohl every time you intend to read a 16-bit or 32-bit word, respectively. That way all your data transfer is considered to be in 'network byte order'.

The great thing about it is, if you decide to port your code to an architecture that uses big-endian byte order, for example the Motorola processors, you can keep those XtoXX calls the same—and the sockets implementation will take care of the rest.

[sub]I REALLY hope that helps.[/sub]
Will

 

[ForeverCode]

Cool, thanx for the info. I'll have to keep that in mind. At the moment I'm just reading the raw packets but soon I'll be creating them as well.

-Micah