proposal: net: receiving IPv4 header on raw IPv4 socket #7037
// BUG(mikio): On every POSIX platform, reads from the "ip4" network // using the ReadFrom or ReadFromIP method might not return a complete // IPv4 packet, including its header, even if there is space // available. This can occur even in cases where Read or ReadMsgIP // could return a complete packet. For this reason, it is recommended // that you do not uses these methods if it is important to receive a // full packet. // // The Go 1 compatibility guidelines make it impossible for us to // change the behavior of these methods; use Read or ReadMsgIP // instead.