forked from Place1/wg-embed
/
iface_linux.go
69 lines (57 loc) · 1.87 KB
/
iface_linux.go
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//go:build linux
// +build linux
package wgembed
import (
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/vishvananda/netlink"
"golang.zx2c4.com/wireguard/device"
)
// NewWithOpts creates a new network interface, needs to be enabled with WireGuardInterface.Up() afterwards.
// opts.Name is require and must be set to a unique interface name
func NewWithOpts(opts Options) (WireGuardInterface, error) {
if opts.AllowKernelModule {
logrus.Debug("creating new kernel interface")
wg, err := newKernelInterface(opts.InterfaceName)
if err != nil {
logrus.Info(errors.Wrap(err, "falling back to embedded Go implementation"))
} else {
return wg, nil
}
}
logrus.Debug("creating new userspace wireguard-go interface")
return newUserspaceInterface(opts.InterfaceName)
}
// Up activates an existing interface created with New() or NewWithOpts()
func (wg *commonInterface) Up() error {
link, err := netlink.LinkByName(wg.Name())
if err != nil {
return errors.Wrap(err, "failed to find wireguard interface")
}
if err := netlink.LinkSetUp(link); err != nil {
return errors.Wrap(err, "failed to bring wireguard interface up")
}
MTU := device.DefaultMTU
if wg.config.Interface.MTU != nil {
MTU = *wg.config.Interface.MTU
}
if err := netlink.LinkSetMTU(link, MTU); err != nil {
return errors.Wrap(err, "failed to set wireguard mtu")
}
logrus.Debug("interface set up successfully")
return nil
}
func (wg *commonInterface) setIP(ip string) error {
link, err := netlink.LinkByName(wg.Name())
if err != nil {
return errors.Wrap(err, "failed to find wireguard interface")
}
linkaddr, err := netlink.ParseAddr(ip)
if err != nil {
return errors.Wrap(err, "failed to parse wireguard interface ip address")
}
if err := netlink.AddrAdd(link, linkaddr); err != nil {
return errors.Wrap(err, "failed to set ip address of wireguard interface")
}
return nil
}