View socket data header?

Question

After accepting data from a socket, can I view the header for the data? I want to know what IP address the packet was sent to as I am listening on multiple interfaces.

For UDP, asked a few times before: http://stackoverflow.com/questions/5281409/get-destination-address-of-a-received-udp-packet — Steve-o, Sep 21 '11 at 12:40

score 3 · Accepted Answer · answered Sep 21 '11 at 12:35

You can use getsockname to fetch the local IP address of the socket.

int getsockname(int socket, struct sockaddr *restrict address,
       socklen_t *restrict address_len);

Here is an example:

struct sockaddr_in addr;
socklen_t len = sizeof(addr);
memset(&addr, 0, sizeof(addr));

getsockname(s, &addr, &len);

View socket data header?

1 Answers1