Get remote ip address of socket
#include <socket.h>
int socket_remote6(int s,char ip[16],uint16 *port,uint32 *scope_id);
socket_remote6 returns the remote IPv6 address, port and scope ID for the UDP or TCP socket s and writes the IPv6 address to ip, the port to port and the scope ID to scope_id.
If scope_id is the null pointer, socket_remote6 will discard the scope ID.
If something goes wrong, socket_remote6 returns -1, setting errno appropriately.