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Resolve tracer 'self' to v6 overlay address when peer is IPv6

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The packet tracer resolved 'self' to the v4 overlay address
unconditionally, causing "mixed address families" errors when tracing
v6 traffic. Pick the self address matching the peer's address family.

Add Engine.GetWgV6Addr() and rework parseAddress into
resolveTraceAddresses which parses the non-self address first to
determine the family, then resolves self accordingly.
This commit is contained in:
Viktor Liu
2026-04-10 13:28:32 +02:00
parent 4fc910031b
commit 51d1edf8b2
2 changed files with 57 additions and 11 deletions
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8
client/internal/engine.go
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@@ -2159,6 +2159,14 @@ func (e *Engine) GetWgAddr() netip.Addr {
return e.wgInterface.Address().IP
}
// GetWgV6Addr returns the IPv6 overlay address of the WireGuard interface.
func (e *Engine) GetWgV6Addr() netip.Addr {
if e.wgInterface == nil {
return netip.Addr{}
}
return e.wgInterface.Address().IPv6
}
func (e *Engine) RenewTun(fd int) error {
e.syncMsgMux.Lock()
wgInterface := e.wgInterface