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control/controlclient: add Auto.updateRoutine

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Instead of having updates replace the map polls, create
a third goroutine which is solely responsible for making
sure that control is aware of the latest client state.

This also makes it so that the streaming map polls are only
broken when there are auth changes, or the client is paused.

Updates tailscale/corp#5761

Signed-off-by: Maisem Ali <maisem@tailscale.com>
This commit is contained in:
Maisem Ali
2023-08-09 19:56:43 -07:00
committed by Maisem Ali
parent 7a5263e6d0
commit d16946854f
4 changed files with 217 additions and 212 deletions
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32
tailcfg/tailcfg.go
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@@ -105,7 +105,8 @@ type CapabilityVersion int
// - 65: 2023-07-12: Client understands DERPMap.HomeParams + incremental DERPMap updates with params
// - 66: 2023-07-23: UserProfile.Groups added (available via WhoIs)
// - 67: 2023-07-25: Client understands PeerCapMap
const CurrentCapabilityVersion CapabilityVersion = 67
// - 68: 2023-08-09: Client has dedicated updateRoutine; MapRequest.Stream true means ignore Hostinfo+Endpoints
const CurrentCapabilityVersion CapabilityVersion = 68
type StableID string
@@ -1082,8 +1083,21 @@ type MapRequest struct {
NodeKey key.NodePublic
DiscoKey key.DiscoPublic
IncludeIPv6 bool `json:",omitempty"` // include IPv6 endpoints in returned Node Endpoints (for Version 4 clients)
Stream bool // if true, multiple MapResponse objects are returned
Hostinfo *Hostinfo
// Stream is whether the client wants to receive multiple MapResponses over
// the same HTTP connection.
//
// If false, the server will send a single MapResponse and then close the
// connection.
//
// If true and Version >= 68, the server should treat this as a read-only
// request and ignore any Hostinfo or other fields that might be set.
Stream bool
// Hostinfo is the client's current Hostinfo. Although it is always included
// in the request, the server may choose to ignore it when Stream is true
// and Version >= 68.
Hostinfo *Hostinfo
// MapSessionHandle, if non-empty, is a request to reattach to a previous
// map session after a previous map session was interrupted for whatever
@@ -1105,6 +1119,7 @@ type MapRequest struct {
MapSessionSeq int64 `json:",omitempty"`
// Endpoints are the client's magicsock UDP ip:port endpoints (IPv4 or IPv6).
// These can be ignored if Stream is true and Version >= 68.
Endpoints []string
// EndpointTypes are the types of the corresponding endpoints in Endpoints.
EndpointTypes []EndpointType `json:",omitempty"`
@@ -1114,13 +1129,12 @@ type MapRequest struct {
// It is encoded as tka.AUMHash.MarshalText.
TKAHead string `json:",omitempty"`
// ReadOnly is whether the client just wants to fetch the
// MapResponse, without updating their Endpoints. The
// Endpoints field will be ignored and LastSeen will not be
// updated and peers will not be notified of changes.
// ReadOnly was set when client just wanted to fetch the MapResponse,
// without updating their Endpoints. The intended use was for clients to
// discover the DERP map at start-up before their first real endpoint
// update.
//
// The intended use is for clients to discover the DERP map at
// start-up before their first real endpoint update.
// Deprecated: always false as of Version 68.
ReadOnly bool `json:",omitempty"`
// OmitPeers is whether the client is okay with the Peers list being omitted