pub fn sendto_v4<Fd: AsFd>( fd: Fd, buf: &[u8], flags: SendFlags, addr: &SocketAddrV4, ) -> Result<usize>
sendto(fd, buf, flags, addr, sizeof(struct sockaddr_in))—Writes data to a socket to a specific IPv4 address.
sendto(fd, buf, flags, addr, sizeof(struct sockaddr_in))