inet6_bind_sk
int inet6_bind_sk(struct sock *sk, struct sockaddr_unsized *uaddr, int addr_len);
return inet6_bind_sk(sock->sk, uaddr, addr_len);
err = inet6_bind_sk(ssk, (struct sockaddr_unsized *)&addr, addrlen);
err = inet6_bind_sk(ssk, uaddr, addr_len);