How to get the destination IP address and source IP from the intercepted data packet?

小法师一个

I use HOOK programming to completely intercept the network data packets of the specified process, and can modify and send them. The question is how do I get the IP address and port sent. There are codes in this area on the Internet, but it is for bonding the network card, which is inconvenient.

hzxszmh

Isn't it specified when CONNECT?

小法师一个

It's not your own program, it's the program of other people HOOK. You can HOOK connet to get the host and port when you connect, but the other party has already connected, and then HOOK, how to get it?

小法师一个

Jump to my own send function as follows:
int WINAPI Mysend(SOCKET s, char FAR *buff, int len, int flags)
  {
          int nReturn;
         
          //You can operate the buff here
          ...................
          nReturn = send(s, buff, len, flags);
          ...................
          //How do I get the source IP and port number, destination IP and port number here??????

          return(nReturn);
  }

爱德华德

Raw socket?