all: add Node.HomeDERP int, phase out "127.3.3.40:$region" hack [capver 111]

This deprecates the old "DERP string" packing a DERP region ID into an IP:port of 127.3.3.40:$REGION_ID and just uses an integer, like PeerChange.DERPRegion does. We still support servers sending the old form; they're converted to the new form internally right when they're read off the network. Updates #14636 Change-Id: I9427ec071f02a2c6d75ccb0fcbf0ecff9f19f26f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-01-14 10:19:52 -08:00
parent 66269dc934
commit 2fc4455e6d
19 changed files with 171 additions and 97 deletions
--- a/wgengine/pendopen.go
+++ b/wgengine/pendopen.go
@ -198,7 +198,7 @@ func (e *userspaceEngine) onOpenTimeout(flow flowtrack.Tuple) {
 			e.logf("open-conn-track: timeout opening %v; peer node %v running pre-0.100", flow, n.Key().ShortString())
 			return
 		}
-		if n.DERP() == "" {
+		if n.HomeDERP() == 0 {
 			e.logf("open-conn-track: timeout opening %v; peer node %v not connected to any DERP relay", flow, n.Key().ShortString())
 			return
 		}