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4ce15505cb
For testing out #2187 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
153 lines
5.2 KiB
Go
153 lines
5.2 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package wgengine
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import (
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"errors"
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"inet.af/netaddr"
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"tailscale.com/ipn/ipnstate"
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"tailscale.com/net/dns"
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"tailscale.com/tailcfg"
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"tailscale.com/types/netmap"
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"tailscale.com/wgengine/filter"
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"tailscale.com/wgengine/monitor"
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"tailscale.com/wgengine/router"
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"tailscale.com/wgengine/wgcfg"
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)
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// Status is the Engine status.
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//
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// TODO(bradfitz): remove this, subset of ipnstate? Need to migrate users.
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type Status struct {
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Peers []ipnstate.PeerStatusLite
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LocalAddrs []tailcfg.Endpoint // the set of possible endpoints for the magic conn
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DERPs int // number of active DERP connections
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}
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// StatusCallback is the type of status callbacks used by
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// Engine.SetStatusCallback.
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//
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// Exactly one of Status or error is non-nil.
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type StatusCallback func(*Status, error)
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// NetInfoCallback is the type used by Engine.SetNetInfoCallback.
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type NetInfoCallback func(*tailcfg.NetInfo)
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// NetworkMapCallback is the type used by callbacks that hook
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// into network map updates.
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type NetworkMapCallback func(*netmap.NetworkMap)
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// someHandle is allocated so its pointer address acts as a unique
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// map key handle. (It needs to have non-zero size for Go to guarantee
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// the pointer is unique.)
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type someHandle struct{ _ byte }
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// ErrNoChanges is returned by Engine.Reconfig if no changes were made.
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var ErrNoChanges = errors.New("no changes made to Engine config")
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// Engine is the Tailscale WireGuard engine interface.
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type Engine interface {
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// Reconfig reconfigures WireGuard and makes sure it's running.
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// This also handles setting up any kernel routes.
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//
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// This is called whenever tailcontrol (the control plane)
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// sends an updated network map.
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//
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// The *tailcfg.Debug parameter can be nil.
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//
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// The returned error is ErrNoChanges if no changes were made.
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Reconfig(*wgcfg.Config, *router.Config, *dns.Config, *tailcfg.Debug) error
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// GetFilter returns the current packet filter, if any.
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GetFilter() *filter.Filter
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// SetFilter updates the packet filter.
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SetFilter(*filter.Filter)
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// SetStatusCallback sets the function to call when the
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// WireGuard status changes.
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SetStatusCallback(StatusCallback)
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// GetLinkMonitor returns the link monitor.
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GetLinkMonitor() *monitor.Mon
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// RequestStatus requests a WireGuard status update right
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// away, sent to the callback registered via SetStatusCallback.
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RequestStatus()
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// Close shuts down this wireguard instance, remove any routes
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// it added, etc. To bring it up again later, you'll need a
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// new Engine.
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Close()
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// Wait waits until the Engine's Close method is called or the
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// engine aborts with an error. You don't have to call this.
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// TODO: return an error?
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Wait()
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// LinkChange informs the engine that the system network
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// link has changed.
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//
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// The isExpensive parameter is not used.
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//
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// LinkChange should be called whenever something changed with
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// the network, no matter how minor.
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//
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// Deprecated: don't use this method. It was removed shortly
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// before the Tailscale 1.6 release when we remembered that
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// Android doesn't use the Linux-based link monitor and has
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// its own mechanism that uses LinkChange. Android is the only
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// caller of this method now. Don't add more.
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LinkChange(isExpensive bool)
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// SetDERPMap controls which (if any) DERP servers are used.
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// If nil, DERP is disabled. It starts disabled until a DERP map
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// is configured.
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SetDERPMap(*tailcfg.DERPMap)
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// SetNetworkMap informs the engine of the latest network map
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// from the server. The network map's DERPMap field should be
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// ignored as as it might be disabled; get it from SetDERPMap
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// instead.
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// The network map should only be read from.
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SetNetworkMap(*netmap.NetworkMap)
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// AddNetworkMapCallback adds a function to a list of callbacks
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// that are called when the network map updates. It returns a
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// function that when called would remove the function from the
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// list of callbacks.
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AddNetworkMapCallback(NetworkMapCallback) (removeCallback func())
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// SetNetInfoCallback sets the function to call when a
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// new NetInfo summary is available.
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SetNetInfoCallback(NetInfoCallback)
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// DiscoPublicKey gets the public key used for path discovery
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// messages.
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DiscoPublicKey() tailcfg.DiscoKey
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// UpdateStatus populates the network state using the provided
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// status builder.
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UpdateStatus(*ipnstate.StatusBuilder)
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// Ping is a request to start a discovery ping with the peer handling
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// the given IP and then call cb with its ping latency & method.
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Ping(ip netaddr.IP, useTSMP bool, cb func(*ipnstate.PingResult))
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// RegisterIPPortIdentity registers a given node (identified by its
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// Tailscale IP) as temporarily having the given IP:port for whois lookups.
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// The IP:port is generally a localhost IP and an ephemeral port, used
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// while proxying connections to localhost.
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RegisterIPPortIdentity(netaddr.IPPort, netaddr.IP)
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// UnregisterIPPortIdentity removes a temporary IP:port registration.
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UnregisterIPPortIdentity(netaddr.IPPort)
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// WhoIsIPPort looks up an IP:port in the temporary registrations,
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// and returns a matching Tailscale IP, if it exists.
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WhoIsIPPort(netaddr.IPPort) (netaddr.IP, bool)
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}
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