getpeername always returns ipv6

[lace28]

Hi,
I have a problem with the function getpeername. It always returns me a structure of type IPV6. Why is that?

I used the code found on http://www.beej.us/guide/bgnet/output/html/multipage/getpeernameman.html and when it gets to checking if it'a an ipv4 or ipv6 it always returns an ipv6.

Any clue?

Thanks.

Lace28

[lace28]

Part of the problem was in the following code:
(from http://www.beej.us/guide/bgnet/output/html/multipage/syscalls.html#getaddrinfo)

int status;
struct addrinfo hints;
struct addrinfo *servinfo;  // will point to the results

memset(&hints, 0, sizeof hints); // make sure the struct is empty
hints.ai_family = AF_UNSPEC;     // don't care IPv4 or IPv6
hints.ai_socktype = SOCK_STREAM; // TCP stream sockets
hints.ai_flags = AI_PASSIVE;     // fill in my IP for me 

The code is not wrong but it may return a structure filled with IPV6 information depending on the computer it's being run on.

To avoid this instead of using AF_UNSPEC I used AF_INET.