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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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11
tailcfg/tailcfg_test.go
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@@ -367,7 +367,7 @@ func TestNodeEqual(t *testing.T) {
nodeHandles := []string{
"ID", "StableID", "Name", "User", "Sharer",
"Key", "KeyExpiry", "KeySignature", "Machine", "DiscoKey",
"Addresses", "AllowedIPs", "Endpoints", "DERP", "Hostinfo",
"Addresses", "AllowedIPs", "Endpoints", "LegacyDERPString", "HomeDERP", "Hostinfo",
"Created", "Cap", "Tags", "PrimaryRoutes",
"LastSeen", "Online", "MachineAuthorized",
"Capabilities", "CapMap",
@@ -530,8 +530,13 @@ func TestNodeEqual(t *testing.T) {
true,
},
{
&Node{DERP: "foo"},
&Node{DERP: "bar"},
&Node{LegacyDERPString: "foo"},
&Node{LegacyDERPString: "bar"},
false,
},
{
&Node{HomeDERP: 1},
&Node{HomeDERP: 2},
false,
},
{