in6pcb_connect
error = in6pcb_connect(inp, (struct sockaddr_in6 *)nam, l);
int in6pcb_connect(void *, struct sockaddr_in6 *, struct lwp *);
if (in6pcb_connect(inp, &sin6, NULL)) {
error = in6pcb_connect(inp, (struct sockaddr_in6 *)nam, l);
error = in6pcb_connect(inp, (struct sockaddr_in6 *)nam, l);