Re: [Qemu-devel] [PATCH v2] net: Transmit zero UDP checksum as 0xFFFF

On Tue, Nov 14, 2017 at 6:57 PM, Ed Swierk wrote: > diff --git a/hw/net/net_tx_pkt.c b/hw/net/net_tx_pkt.c > index 20b2549..dc95f12 100644 > --- a/hw/net/net_tx_pkt.c > +++ b/hw/net/net_tx_pkt.c > @@ -126,12 +126,12 @@ void net_tx_pkt_update_ip_checksums(struct

[Qemu-devel] [PATCH v2] net: Transmit zero UDP checksum as 0xFFFF

The checksum algorithm used by IPv4, TCP and UDP allows a zero value to be represented by either 0x and 0x. But per RFC 768, a zero UDP checksum must be transmitted as 0x, as 0x is a special value meaning no checksum. Substitute 0x whenever a checksum is computed as zero when