Re: PROBLEM: sendto does not block when an IPSec SA must beestablished

From: David S. Miller (
Date: Mon Aug 11 2003 - 21:11:23 EST

On Mon, 11 Aug 2003 12:44:11 -0700
Brian Buesker <bbuesker@xxxxxxxxxxxx> wrote:

> Summary: When a send of a UDP packet over IPv6 triggers an IPSec SA to
> be established via IKE, the sendto call returns immediately with
> ENETUNREACH irregardless of whether the MSG_DONTWAIT flag is set or not.

Known problem, no ETA for a fix because it requires a substantial
amount of work. This bug is even mentioned in Andrew Morton's
2.5.x/2.6.x must-fix list.
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