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Handle peer interface config change (#348)

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Before this change, NetBird Agent wasn't handling
peer interface configuration changes dynamically.
Also, remote peer configuration changes have
not been applied (e.g. AllowedIPs changed).
Not a very common cause, but still it should be handled.
Now, Agent reacts to PeerConfig changes sent from the
management service and restarts remote connections
if AllowedIps have been changed.
This commit is contained in:
Misha Bragin
2022-06-04 19:41:01 +02:00
committed by GitHub
parent 60ac8c3268
commit e6e9f0322f
13 changed files with 278 additions and 83 deletions
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iface/iface_linux.go
+10 -13
View File
@@ -2,7 +2,6 @@ package iface
import (
"errors"
"fmt"
"math"
"os"
"syscall"
@@ -33,22 +32,24 @@ func WireguardModExists() bool {
return errors.Is(err, syscall.EINVAL)
}
// Create Creates a new Wireguard interface, sets a given IP and brings it up.
// Create creates a new Wireguard interface, sets a given IP and brings it up.
// Will reuse an existing one.
func (w *WGIface) Create() error {
w.mu.Lock()
defer w.mu.Unlock()
if WireguardModExists() {
log.Info("using kernel WireGuard")
return w.CreateWithKernel()
return w.createWithKernel()
} else {
log.Info("using userspace WireGuard")
return w.CreateWithUserspace()
return w.createWithUserspace()
}
}
// CreateWithKernel Creates a new Wireguard interface using kernel Wireguard module.
// createWithKernel Creates a new Wireguard interface using kernel Wireguard module.
// Works for Linux and offers much better network performance
func (w *WGIface) CreateWithKernel() error {
func (w *WGIface) createWithKernel() error {
link := newWGLink(w.Name)
@@ -106,10 +107,6 @@ func (w *WGIface) CreateWithKernel() error {
// assignAddr Adds IP address to the tunnel interface
func (w *WGIface) assignAddr() error {
mask, _ := w.Address.Network.Mask.Size()
address := fmt.Sprintf("%s/%d", w.Address.IP.String(), mask)
link := newWGLink(w.Name)
//delete existing addresses
@@ -126,11 +123,11 @@ func (w *WGIface) assignAddr() error {
}
}
log.Debugf("adding address %s to interface: %s", address, w.Name)
addr, _ := netlink.ParseAddr(address)
log.Debugf("adding address %s to interface: %s", w.Address.String(), w.Name)
addr, _ := netlink.ParseAddr(w.Address.String())
err = netlink.AddrAdd(link, addr)
if os.IsExist(err) {
log.Infof("interface %s already has the address: %s", w.Name, address)
log.Infof("interface %s already has the address: %s", w.Name, w.Address.String())
} else if err != nil {
return err
}