23 Mar
2026
23 Mar
'26
11:41 p.m.
On Mon, Mar 23, 2026 at 07:15:36PM +0100, Laurent Vivier wrote:
On 3/23/26 19:01, Laurent Vivier wrote:
iPXE, however, does not negotiate GUEST_CSUM, ignores the DATA_VALID flag entirely, and always verifies checksums. This caused TCP connections to fail: the SYN-ACK had a zero TCP checksum, iPXE rejected it, and the connection timed out in SYN_RCVD.
And if you're wondering who's behind this laziness, check the author's name...
https://gitlab.com/qemu-project/ipxe/-/blob/master/src/drivers/net/virtio-ne...
Aw man, not that guy! -- David Gibson (he or they) | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you, not the other way | around. http://www.ozlabs.org/~dgibson