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all: declare & plumb IPv6 masquerade address for peer

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This PR plumbs through awareness of an IPv6 SNAT/masquerade address from the wire protocol
through to the low-level (tstun / wgengine). This PR is the first in two PRs for implementing
IPv6 NAT support to/from peers.

A subsequent PR will implement the data-plane changes to implement IPv6 NAT - this is just plumbing.

Signed-off-by: Tom DNetto <tom@tailscale.com>
Updates ENG-991
This commit is contained in:
Tom DNetto
2023-09-18 17:03:53 -07:00
committed by Tom
parent d9ae7d670e
commit c08cf2a9c6
13 changed files with 81 additions and 9 deletions
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1
wgengine/wgcfg/nmcfg/nmcfg.go
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@@ -99,6 +99,7 @@ func WGCfg(nm *netmap.NetworkMap, logf logger.Logf, flags netmap.WGConfigFlags,
didExitNodeWarn := false
cpeer.V4MasqAddr = peer.SelfNodeV4MasqAddrForThisPeer()
cpeer.V6MasqAddr = peer.SelfNodeV6MasqAddrForThisPeer()
for i := range peer.AllowedIPs().LenIter() {
allowedIP := peer.AllowedIPs().At(i)
if allowedIP.Bits() == 0 && peer.StableID() != exitNode {