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

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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>
This commit is contained in:
Brad Fitzpatrick
2025-01-14 10:19:52 -08:00
committed by Brad Fitzpatrick
parent 66269dc934
commit 2fc4455e6d
19 changed files with 171 additions and 97 deletions
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12
ipn/ipnlocal/local_test.go
View File

@@ -1007,8 +1007,8 @@ func TestUpdateNetmapDelta(t *testing.T) {
wants := []*tailcfg.Node{
{
ID: 1,
DERP: "127.3.3.40:1",
ID: 1,
HomeDERP: 1,
},
{
ID: 2,
@@ -2021,7 +2021,7 @@ func TestAutoExitNodeSetNetInfoCallback(t *testing.T) {
netip.MustParsePrefix("100.64.1.1/32"),
netip.MustParsePrefix("fe70::1/128"),
},
DERP: "127.3.3.40:2",
HomeDERP: 2,
}
defaultDERPMap := &tailcfg.DERPMap{
Regions: map[int]*tailcfg.DERPRegion{
@@ -2985,7 +2985,7 @@ func makePeer(id tailcfg.NodeID, opts ...peerOptFunc) tailcfg.NodeView {
ID: id,
StableID: tailcfg.StableNodeID(fmt.Sprintf("stable%d", id)),
Name: fmt.Sprintf("peer%d", id),
DERP: fmt.Sprintf("127.3.3.40:%d", id),
HomeDERP: int(id),
}
for _, opt := range opts {
opt(node)
@@ -3001,13 +3001,13 @@ func withName(name string) peerOptFunc {
func withDERP(region int) peerOptFunc {
return func(n *tailcfg.Node) {
n.DERP = fmt.Sprintf("127.3.3.40:%d", region)
n.HomeDERP = region
}
}
func withoutDERP() peerOptFunc {
return func(n *tailcfg.Node) {
n.DERP = ""
n.HomeDERP = 0
}
}