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tailcfg, control/controlclient: add tailcfg.PeersChangedPatch [capver 33]

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This adds a lighter mechanism for endpoint updates from control.

Change-Id: If169c26becb76d683e9877dc48cfb35f90cc5f24
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2022-07-20 13:31:20 -07:00
committed by Brad Fitzpatrick
parent b763a12331
commit d8cb5aae17
4 changed files with 104 additions and 10 deletions
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36
tailcfg/tailcfg.go
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@@ -67,7 +67,8 @@ type CapabilityVersion int
// 30: 2022-03-22: client can request id tokens.
// 31: 2022-04-15: PingRequest & PingResponse TSMP & disco support
// 32: 2022-04-17: client knows FilterRule.CapMatch
const CurrentCapabilityVersion CapabilityVersion = 32
// 33: 2022-07-20: added MapResponse.PeersChangedPatch (DERPRegion + Endpoints)
const CurrentCapabilityVersion CapabilityVersion = 33
type StableID string
@@ -1237,6 +1238,15 @@ type MapResponse struct {
// PeersRemoved are the NodeIDs that are no longer in the peer list.
PeersRemoved []NodeID `json:",omitempty"`
// PeersChangedPatch, if non-nil, means that node(s) have changed.
// This is a lighter version of the older PeersChanged support that
// only supports certain types of updates
//
// These are applied after Peers* above, but in practice the
// control server should only send these on their own, without
// the Peers* fields also set.
PeersChangedPatch []*PeerChange `json:",omitempty"`
// PeerSeenChange contains information on how to update peers' LastSeen
// times. If the value is false, the peer is gone. If the value is true,
// the LastSeen time is now. Absent means unchanged.
@@ -1724,3 +1734,27 @@ type TokenResponse struct {
// `uid` | user ID, if not tagged
IDToken string `json:"id_token"`
}
// PeerChange is an update to a node.
type PeerChange struct {
// NodeID is the node ID being mutated. If the NodeID is not
// known in the current netmap, this update should be
// ignored. (But the server will try not to send such useless
// updates.)
NodeID NodeID
// DERPRegion, if non-zero, means that NodeID's home DERP
// region ID is now this number.
DERPRegion int `json:",omitempty"`
// Endpoints, if non-empty, means that NodeID's UDP Endpoints
// have changed to these.
Endpoints []string `json:",omitempty"`
}
// DerpMagicIP is a fake WireGuard endpoint IP address that means to
// use DERP. When used (in the Node.DERP field), the port number of
// the WireGuard endpoint is the DERP region ID number to use.
//
// Mnemonic: 3.3.40 are numbers above the keys D, E, R, P.
const DerpMagicIP = "127.3.3.40"