TheArchive/tailscale
1
0
Fork 0
mirror of https://github.com/tailscale/tailscale.git synced 2025-08-22 11:01:54 +00:00
Code Issues Packages Projects Releases Wiki Activity

wgengine/router: rely on events for deleted IP rules (#16744)

Browse Source 
Adds the eventbus to the router subsystem.

The event is currently only used on linux.

Also includes facilities to inject events into the bus.

Updates #15160

Signed-off-by: Claus Lensbøl <claus@tailscale.com>
This commit is contained in:
Claus Lensbøl
2025-08-05 08:31:51 -04:00
committed by GitHub
parent b0018f1e7d
commit 5bb42e3018
15 changed files with 132 additions and 82 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
net/netmon/netmon.go
View File

@@ -66,7 +66,6 @@ type Monitor struct {
mu sync.Mutex // guards all following fields
cbs set.HandleSet[ChangeFunc]
ruleDelCB set.HandleSet[RuleDeleteCallback]
ifState *State
gwValid bool // whether gw and gwSelfIP are valid
gw netip.Addr // our gateway's IP
@@ -224,29 +223,6 @@ func (m *Monitor) RegisterChangeCallback(callback ChangeFunc) (unregister func()
}
}
// RuleDeleteCallback is a callback when a Linux IP policy routing
// rule is deleted. The table is the table number (52, 253, 354) and
// priority is the priority order number (for Tailscale rules
// currently: 5210, 5230, 5250, 5270)
type RuleDeleteCallback func(table uint8, priority uint32)
// RegisterRuleDeleteCallback adds callback to the set of parties to be
// notified (in their own goroutine) when a Linux ip rule is deleted.
// To remove this callback, call unregister (or close the monitor).
func (m *Monitor) RegisterRuleDeleteCallback(callback RuleDeleteCallback) (unregister func()) {
if m.static {
return func() {}
}
m.mu.Lock()
defer m.mu.Unlock()
handle := m.ruleDelCB.Add(callback)
return func() {
m.mu.Lock()
defer m.mu.Unlock()
delete(m.ruleDelCB, handle)
}
}
// Start starts the monitor.
// A monitor can only be started & closed once.
func (m *Monitor) Start() {
@@ -359,10 +335,6 @@ func (m *Monitor) pump() {
time.Sleep(time.Second)
continue
}
if rdm, ok := msg.(ipRuleDeletedMessage); ok {
m.notifyRuleDeleted(rdm)
continue
}
if msg.ignore() {
continue
}
@@ -370,14 +342,6 @@ func (m *Monitor) pump() {
}
}
func (m *Monitor) notifyRuleDeleted(rdm ipRuleDeletedMessage) {
m.mu.Lock()
defer m.mu.Unlock()
for _, cb := range m.ruleDelCB {
go cb(rdm.table, rdm.priority)
}
}
// isInterestingInterface reports whether the provided interface should be
// considered when checking for network state changes.
// The ips parameter should be the IPs of the provided interface.
@@ -624,10 +588,3 @@ func (m *Monitor) checkWallTimeAdvanceLocked() bool {
func (m *Monitor) resetTimeJumpedLocked() {
m.timeJumped = false
}
type ipRuleDeletedMessage struct {
table uint8
priority uint32
}
func (ipRuleDeletedMessage) ignore() bool { return true }