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gluetun/internal/netlink/ipv6.go

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package netlink
import (
"fmt"
"github.com/vishvananda/netlink"
)
func (n *NetLink) IsIPv6Supported() (supported bool, err error) {
links, err := n.LinkList()
if err != nil {
return false, fmt.Errorf("listing links: %w", err)
}
for _, link := range links {
routes, err := n.RouteList(link, netlink.FAMILY_V6)
if err != nil {
return false, fmt.Errorf("listing IPv6 routes for link %s: %w",
link.Attrs().Name, err)
}
if len(routes) == 0 {
continue
}
return true, nil
}
return false, nil
}