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Add IPv6 overlay address support to client interface and engine

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This commit is contained in:
Viktor Liu
2026-03-24 06:56:49 +01:00
parent 013770070a
commit b852ce1a99
60 changed files with 4077 additions and 1647 deletions
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41
client/iface/device/wg_link_linux.go
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@@ -4,6 +4,8 @@ package device
import (
"fmt"
"net"
"net/netip"
"os"
log "github.com/sirupsen/logrus"
@@ -92,7 +94,7 @@ func (l *wgLink) up() error {
return nil
}
func (l *wgLink) assignAddr(address wgaddr.Address) error {
func (l *wgLink) assignAddr(address *wgaddr.Address) error {
//delete existing addresses
list, err := netlink.AddrList(l, 0)
if err != nil {
@@ -110,20 +112,16 @@ func (l *wgLink) assignAddr(address wgaddr.Address) error {
}
name := l.attrs.Name
addrStr := address.String()
log.Debugf("adding address %s to interface: %s", addrStr, name)
addr, err := netlink.ParseAddr(addrStr)
if err != nil {
return fmt.Errorf("parse addr: %w", err)
if err := l.addAddr(name, address.Prefix()); err != nil {
return err
}
err = netlink.AddrAdd(l, addr)
if os.IsExist(err) {
log.Infof("interface %s already has the address: %s", name, addrStr)
} else if err != nil {
return fmt.Errorf("add addr: %w", err)
if address.HasIPv6() {
if err := l.addAddr(name, address.IPv6Prefix()); err != nil {
log.Warnf("failed to assign IPv6 address %s to %s, continuing v4-only: %v", address.IPv6Prefix(), name, err)
address.ClearIPv6()
}
}
// On linux, the link must be brought up
@@ -133,3 +131,22 @@ func (l *wgLink) assignAddr(address wgaddr.Address) error {
return nil
}
func (l *wgLink) addAddr(ifaceName string, prefix netip.Prefix) error {
log.Debugf("adding address %s to interface: %s", prefix, ifaceName)
addr := &netlink.Addr{
IPNet: &net.IPNet{
IP: prefix.Addr().AsSlice(),
Mask: net.CIDRMask(prefix.Bits(), prefix.Addr().BitLen()),
},
}
if err := netlink.AddrAdd(l, addr); os.IsExist(err) {
log.Infof("interface %s already has the address: %s", ifaceName, prefix)
} else if err != nil {
return fmt.Errorf("add addr %s: %w", prefix, err)
}
return nil
}