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refactort: extract method to create Wireguard interface using kernel module

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This commit is contained in:
braginini 2021-06-24 11:02:40 +02:00
parent 729b16e599
commit f2ca2fc7c1
3 changed files with 54 additions and 48 deletions
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2
iface/iface.go
View File

@ -5,5 +5,5 @@ package iface
// Create Creates a new Wireguard interface, sets a given IP and brings it up.
// Will reuse an existing one.
func Create(iface string, address string) error {
return CreateInUserspace(iface, address)
return CreateWithUserspace(iface, address)
}

4
iface/iface_configuration.go
View File

@ -26,8 +26,8 @@ func ConfigureWithKeyGen(iface string) (*wgtypes.Key, error) {
return &key, Configure(iface, key.String())
}
// CreateInUserspace Creates a new Wireguard interface, using wireguard-go userspace implementation
func CreateInUserspace(iface string, address string) error {
// CreateWithUserspace Creates a new Wireguard interface, using wireguard-go userspace implementation
func CreateWithUserspace(iface string, address string) error {
var err error
tunIface, err := tun.CreateTUN(iface, defaultMTU)
if err != nil {

96
iface/iface_linux.go
View File

@ -11,56 +11,62 @@ import (
func Create(iface string, address string) error {
if WireguardModExists() {
attrs := netlink.NewLinkAttrs()
attrs.Name = iface
link := wgLink{
attrs: &attrs,
}
log.Debugf("adding device: %s", iface)
err := netlink.LinkAdd(&link)
if os.IsExist(err) {
log.Infof("interface %s already exists. Will reuse.", iface)
} else if err != nil {
return err
}
log.Debugf("adding address %s to interface: %s", address, iface)
addr, _ := netlink.ParseAddr(address)
err = netlink.AddrAdd(&link, addr)
if os.IsExist(err) {
log.Infof("interface %s already has the address: %s", iface, address)
} else if err != nil {
return err
}
err = assignAddr(address, iface)
if err != nil {
return err
}
// todo do a discovery
log.Debugf("setting MTU: %s", iface)
err = netlink.LinkSetMTU(&link, defaultMTU)
if err != nil {
log.Errorf("error setting MTU on interface: %s", iface)
return err
}
log.Debugf("bringing up interface: %s", iface)
err = netlink.LinkSetUp(&link)
if err != nil {
log.Errorf("error bringing up interface: %s", iface)
return err
}
return nil
return CreateWithKernel(iface, address)
} else {
return CreateInUserspace(iface, address)
return CreateWithUserspace(iface, address)
}
}
// CreateWithKernel Creates a new Wireguard interface using kernel Wireguard module.
// Works for Linux and offers much better network performance
func CreateWithKernel(iface string, address string) error {
attrs := netlink.NewLinkAttrs()
attrs.Name = iface
link := wgLink{
attrs: &attrs,
}
log.Debugf("adding device: %s", iface)
err := netlink.LinkAdd(&link)
if os.IsExist(err) {
log.Infof("interface %s already exists. Will reuse.", iface)
} else if err != nil {
return err
}
log.Debugf("adding address %s to interface: %s", address, iface)
addr, _ := netlink.ParseAddr(address)
err = netlink.AddrAdd(&link, addr)
if os.IsExist(err) {
log.Infof("interface %s already has the address: %s", iface, address)
} else if err != nil {
return err
}
err = assignAddr(address, iface)
if err != nil {
return err
}
// todo do a discovery
log.Debugf("setting MTU: %s", iface)
err = netlink.LinkSetMTU(&link, defaultMTU)
if err != nil {
log.Errorf("error setting MTU on interface: %s", iface)
return err
}
log.Debugf("bringing up interface: %s", iface)
err = netlink.LinkSetUp(&link)
if err != nil {
log.Errorf("error bringing up interface: %s", iface)
return err
}
return nil
}
// assignAddr Adds IP address to the tunnel interface
func assignAddr(address, name string) error {
var err error