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net/packet/checksum: fix v6 NAT

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We were copying 12 out of the 16 bytes which meant that
the 1:1 NAT required would only work if the last 4 bytes
happened to match between the new and old address, something
that our tests accidentally had. Fix it by copying the full
16 bytes and make the tests also verify the addr and use rand
addresses.

Updates #9511

Signed-off-by: Maisem Ali <maisem@tailscale.com>
This commit is contained in:
Maisem Ali
2024-08-03 08:57:31 -07:00
committed by Maisem Ali
parent a917718353
commit f205efcf18
3 changed files with 34 additions and 6 deletions
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3
tailcfg/tailcfg.go
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@ -146,7 +146,8 @@ type CapabilityVersion int
// - 101: 2024-07-01: Client supports SSH agent forwarding when handling connections with /bin/su
// - 102: 2024-07-12: NodeAttrDisableMagicSockCryptoRouting support
// - 103: 2024-07-24: Client supports NodeAttrDisableCaptivePortalDetection
const CurrentCapabilityVersion CapabilityVersion = 103
// - 104: 2024-08-03: SelfNodeV6MasqAddrForThisPeer now works
const CurrentCapabilityVersion CapabilityVersion = 104
type StableID string