110 lines
2.4 KiB
Go
110 lines
2.4 KiB
Go
package notifier
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import (
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"fmt"
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"strings"
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"sync"
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"github.com/juanfont/headscale/hscontrol/types"
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"github.com/juanfont/headscale/hscontrol/util"
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"github.com/rs/zerolog/log"
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"tailscale.com/types/key"
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)
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type Notifier struct {
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l sync.RWMutex
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nodes map[string]chan<- types.StateUpdate
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}
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func NewNotifier() *Notifier {
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return &Notifier{}
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}
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func (n *Notifier) AddNode(machineKey key.MachinePublic, c chan<- types.StateUpdate) {
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log.Trace().Caller().Str("key", machineKey.ShortString()).Msg("acquiring lock to add node")
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defer log.Trace().Caller().Str("key", machineKey.ShortString()).Msg("releasing lock to add node")
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n.l.Lock()
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defer n.l.Unlock()
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if n.nodes == nil {
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n.nodes = make(map[string]chan<- types.StateUpdate)
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}
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n.nodes[machineKey.String()] = c
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log.Trace().
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Str("machine_key", machineKey.ShortString()).
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Int("open_chans", len(n.nodes)).
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Msg("Added new channel")
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}
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func (n *Notifier) RemoveNode(machineKey key.MachinePublic) {
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log.Trace().Caller().Str("key", machineKey.ShortString()).Msg("acquiring lock to remove node")
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defer log.Trace().Caller().Str("key", machineKey.ShortString()).Msg("releasing lock to remove node")
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n.l.Lock()
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defer n.l.Unlock()
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if n.nodes == nil {
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return
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}
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delete(n.nodes, machineKey.String())
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log.Trace().
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Str("machine_key", machineKey.ShortString()).
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Int("open_chans", len(n.nodes)).
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Msg("Removed channel")
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}
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// IsConnected reports if a node is connected to headscale and has a
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// poll session open.
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func (n *Notifier) IsConnected(machineKey key.MachinePublic) bool {
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n.l.RLock()
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defer n.l.RUnlock()
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if _, ok := n.nodes[machineKey.String()]; ok {
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return true
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}
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return false
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}
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func (n *Notifier) NotifyAll(update types.StateUpdate) {
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n.NotifyWithIgnore(update)
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}
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func (n *Notifier) NotifyWithIgnore(update types.StateUpdate, ignore ...string) {
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log.Trace().Caller().Interface("type", update.Type).Msg("acquiring lock to notify")
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defer log.Trace().
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Caller().
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Interface("type", update.Type).
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Msg("releasing lock, finished notifing")
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n.l.RLock()
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defer n.l.RUnlock()
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for key, c := range n.nodes {
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if util.IsStringInSlice(ignore, key) {
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continue
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}
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log.Trace().Caller().Str("machine", key).Strs("ignoring", ignore).Msg("sending update")
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c <- update
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}
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}
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func (n *Notifier) String() string {
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n.l.RLock()
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defer n.l.RUnlock()
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str := []string{"Notifier, in map:\n"}
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for k, v := range n.nodes {
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str = append(str, fmt.Sprintf("\t%s: %v\n", k, v))
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}
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return strings.Join(str, "")
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}
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