Is the tcp window size relevant to the SND_BUF or RCV_BUF of the tcp socket?

Question

I want to know when I change the SND_BUF of a socket via setsockopt API, will the original window size of the TCP layer be changed accordingly?

score 3 · Answer 1 · answered Mar 08 '12 at 09:32

3

It doesn't change since it is receive window size, whereas SO_SNDBUF controls the size of the send buffer.

answered Mar 08 '12 at 09:32

Maxim Egorushkin

Then is the SO_RCVBUF relevant? – ciphor Mar 08 '12 at 10:08
Yep, it needs to be set before calling `connect()` or `listen()` though. – Maxim Egorushkin Mar 08 '12 at 10:34
See this answer for an example of how relevant. http://stackoverflow.com/a/8579250/7925 – Len Holgate Mar 08 '12 at 13:29

1 Answers1