[Swan] Regarding: pluto error message in pcaket capture

[Paul Wouters]

On Mon, 1 Apr 2024, kumar priyankar via Swan wrote:

> Issue is that my log space suddenly started getting filled up on the server, when checked in syslog  and
> also in pcap, I saw only one message.
> 
> pluto: ERROR: recvmsg(,, MSG_ERRQUEUE) on eth0 failed (noticed before read_packet) (attempt 9). Errno 11:
> Resource temporarily unavailable\n\n

What version of libreswan is this? (ipsec --version output) and
what kernel version (uname -a)

> This looks like an infinite reattempt loop, Also when i restart ipsec service, issue resolved.

It happens when recvmsg() returns -1. The log is also rate-limited, so
it's happening a lot? Could be a kernel bug or network stack bug?

Does tcpdump show receiving UDP packets on port 500 or 4500?

Paul