pkt-gen: fix UDP checksum when IPv6 address ranges are usedHEADmain

update_ip6() left the UDP checksum stale for most packets. Unlike
update_ip(), it computed the incremental checksum delta only after the
source-address wrap, so every earlier "break" (port increment, address
increment, and both random paths) returned with udp_sum still 0 and no
correction applied. The trailing delta block also re-read oaddr/naddr
after they had been reassigned, so the source and destination deltas
could not both be accounted for.

Fold each delta in with new_udp_sum() before the corresponding break,
mirroring the structure update_ip() already uses, and drop the stale
trailing block. IPv4 was not affected.

Verified by driving update_addresses() directly and recomputing every
checksum from scratch over the real pseudo-header: 128 packets across
six range configurations, 12 mismatches before, 0 after. IPv4 passes
both before and after.

Submitted by:	Olivier Cochard-Labbé <olivier@cochard.me>

0 files changed, 0 insertions, 0 deletions