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boot_net: Use real_time_clock_usecs() for TCP

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Initialize the PRNG seed for the sequence number with real_time_clock_usecs()
rather than system_time(). The remaining uses of system_time() for timeout
calculation match UDP.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38482 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Andreas Färber 2010-08-31 18:51:57 +00:00
parent 58b1d4608a
commit 6dfef7e9b2
1 changed files with 3 additions and 1 deletions
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4
src/system/boot/loader/net/TCP.cpp
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@ -24,6 +24,8 @@
#include <boot/net/ChainBuffer.h>
#include <boot/net/NetStack.h>
#include "real_time_clock.h"
//#define TRACE_TCP
//#define TRACE_TCP_RANDOMNESS
@ -46,7 +48,7 @@ _rand32(void)
{
static unsigned int next = 0;
if (next == 0)
next = system_time() / 1000;
next = real_time_clock_usecs() / 1000000;
next = (next >> 1) ^ (unsigned int)(-(next & 1U) & 0xd0000001U);
// characteristic polynomial: x^32 + x^31 + x^29 + x + 1