Socket SO_RCVTIMEO Timeout is double the set value in C++/VC++

Question

Please, show below example

int val = 120000;
setsockopt(connSock,SOL_SOCKET,SO_RCVTIMEO,(char*)&val,sizeof(int));

I set 120 seconds at receive timeout but it takes 240 seconds.

I think timeout is double the set value.

how is it possible?

Answer 1

SO_RCVTIMEO does not accept an int as the timeout. You're looking for something like this:

struct timeval tv = {
    .tv_sec = 120
};

setsockopt(connSock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));