IPAddress.GetAddressBytes() method - what byte order?

Question

What is the byte ordering of the 4-byte array returned by the GetAddressBytes() method of IPAddress class?

Is it big or little endian? I need to put some IP addresses to the message body, so it is important to me.

score 13 · Answer 1 · answered Sep 10 '09 at 22:09

13

Network byte order ( = big endian). See:

answered Sep 10 '09 at 22:09

Mauricio Scheffer

1

This is correct according to my tests. But it would be nice if there was an official doc to confirm, or at least a .NET framework source code sample. – Jordan Rieger May 12 '17 at 19:08
1

@JordanRieger: https://referencesource.microsoft.com/#System/net/System/Net/IPAddress.cs,004b582eb374555f – Robert Harvey Jul 24 '18 at 19:38

score 6 · Answer 2 · answered Sep 10 '09 at 22:01

6

Big-Endian: 127.0.0.1 -> [127, 0, 0, 1]

answered Sep 10 '09 at 22:01

Vinay Sajip

score 4 · Answer 3 · answered Sep 10 '09 at 22:00

4

The same as the address you would read it if you had it as a normal dotted string.

Ie. "127.0.0.1" will give you 127, 0, 0, 1, in that order.

answered Sep 10 '09 at 22:00

Lasse V. Karlsen

3 Answers3