safing-portmaster/service/network/state/tcp.go
Daniel Hååvi 80664d1a27
Restructure modules (#1572)
* Move portbase into monorepo

* Add new simple module mgr

* [WIP] Switch to new simple module mgr

* Add StateMgr and more worker variants

* [WIP] Switch more modules

* [WIP] Switch more modules

* [WIP] swtich more modules

* [WIP] switch all SPN modules

* [WIP] switch all service modules

* [WIP] Convert all workers to the new module system

* [WIP] add new task system to module manager

* [WIP] Add second take for scheduling workers

* [WIP] Add FIXME for bugs in new scheduler

* [WIP] Add minor improvements to scheduler

* [WIP] Add new worker scheduler

* [WIP] Fix more bug related to new module system

* [WIP] Fix start handing of the new module system

* [WIP] Improve startup process

* [WIP] Fix minor issues

* [WIP] Fix missing subsystem in settings

* [WIP] Initialize managers in constructor

* [WIP] Move module event initialization to constrictors

* [WIP] Fix setting for enabling and disabling the SPN module

* [WIP] Move API registeration into module construction

* [WIP] Update states mgr for all modules

* [WIP] Add CmdLine operation support

* Add state helper methods to module group and instance

* Add notification and module status handling to status package

* Fix starting issues

* Remove pilot widget and update security lock to new status data

* Remove debug logs

* Improve http server shutdown

* Add workaround for cleanly shutting down firewall+netquery

* Improve logging

* Add syncing states with notifications for new module system

* Improve starting, stopping, shutdown; resolve FIXMEs/TODOs

* [WIP] Fix most unit tests

* Review new module system and fix minor issues

* Push shutdown and restart events again via API

* Set sleep mode via interface

* Update example/template module

* [WIP] Fix spn/cabin unit test

* Remove deprecated UI elements

* Make log output more similar for the logging transition phase

* Switch spn hub and observer cmds to new module system

* Fix log sources

* Make worker mgr less error prone

* Fix tests and minor issues

* Fix observation hub

* Improve shutdown and restart handling

* Split up big connection.go source file

* Move varint and dsd packages to structures repo

* Improve expansion test

* Fix linter warnings

* Fix interception module on windows

* Fix linter errors

---------

Co-authored-by: Vladimir Stoilov <vladimir@safing.io>
2024-08-09 18:15:48 +03:00

91 lines
2.1 KiB
Go

package state
import (
"net"
"sync"
"sync/atomic"
"time"
"github.com/safing/portmaster/base/log"
"github.com/safing/portmaster/base/utils"
"github.com/safing/portmaster/service/network/socket"
)
const (
minDurationBetweenTableUpdates = 10 * time.Millisecond
)
type tcpTable struct {
version int
connections []*socket.ConnectionInfo
listeners []*socket.BindInfo
lock sync.RWMutex
// lastUpdateAt stores the time when the tables where last updated as unix nanoseconds.
lastUpdateAt atomic.Int64
fetchLimiter *utils.CallLimiter
fetchTable func() (connections []*socket.ConnectionInfo, listeners []*socket.BindInfo, err error)
dualStack *tcpTable
}
var (
tcp6Table = &tcpTable{
version: 6,
fetchLimiter: utils.NewCallLimiter(minDurationBetweenTableUpdates),
fetchTable: getTCP6Table,
}
tcp4Table = &tcpTable{
version: 4,
fetchLimiter: utils.NewCallLimiter(minDurationBetweenTableUpdates),
fetchTable: getTCP4Table,
}
)
// EnableTCPDualStack adds the TCP6 table to the TCP4 table as a dual-stack.
// Must be called before any lookup operation.
func EnableTCPDualStack() {
tcp4Table.dualStack = tcp6Table
}
func (table *tcpTable) getCurrentTables() (
connections []*socket.ConnectionInfo,
listeners []*socket.BindInfo,
) {
table.lock.RLock()
defer table.lock.RUnlock()
return table.connections, table.listeners
}
func (table *tcpTable) updateTables() (
connections []*socket.ConnectionInfo,
listeners []*socket.BindInfo,
) {
// Fetch tables.
table.fetchLimiter.Do(func() {
// Fetch new tables from system.
connections, listeners, err := table.fetchTable()
if err != nil {
log.Warningf("state: failed to get TCP%d socket table: %s", table.version, err)
return
}
// Pre-check for any listeners.
for _, bindInfo := range listeners {
bindInfo.ListensAny = bindInfo.Local.IP.Equal(net.IPv4zero) || bindInfo.Local.IP.Equal(net.IPv6zero)
}
// Apply new tables.
table.lock.Lock()
defer table.lock.Unlock()
table.connections = connections
table.listeners = listeners
table.lastUpdateAt.Store(time.Now().UnixNano())
})
return table.getCurrentTables()
}