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tailcfg,wgengine: add initial support for WireGuard only peers

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A peer can have IsWireGuardOnly, which means it will not support DERP or
Disco, and it must have Endpoints filled in order to be usable.

In the present implementation only the first Endpoint will be used as
the bestAddr.

Updates tailscale/corp#10351

Co-authored-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>
Co-authored-by: James Tucker <james@tailscale.com>
Signed-off-by: James Tucker <james@tailscale.com>
This commit is contained in:
Charlotte Brandhorst-Satzkorn
2023-04-05 17:28:28 -07:00
committed by James Tucker
parent 6cfcb3cae4
commit c573bef0aa
8 changed files with 254 additions and 36 deletions
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2
wgengine/wgcfg/nmcfg/nmcfg.go
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@@ -85,7 +85,7 @@ func WGCfg(nm *netmap.NetworkMap, logf logger.Logf, flags netmap.WGConfigFlags,
skippedSubnets := new(bytes.Buffer)
for _, peer := range nm.Peers {
if peer.DiscoKey.IsZero() && peer.DERP == "" {
if peer.DiscoKey.IsZero() && peer.DERP == "" && !peer.IsWireGuardOnly {
// Peer predates both DERP and active discovery, we cannot
// communicate with it.
logf("[v1] wgcfg: skipped peer %s, doesn't offer DERP or disco", peer.Key.ShortString())