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fix(ipv6): detect ignoring loopback route destinations

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This commit is contained in:
Quentin McGaw
2024-05-09 18:21:13 +00:00
parent 4bd16373f2
commit fd4689ee70
1 changed files with 12 additions and 7 deletions
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15
internal/netlink/ipv6.go
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@@ -14,17 +14,22 @@ func (n *NetLink) IsIPv6Supported() (supported bool, err error) {
// as IPv6 routes at container start, see: // as IPv6 routes at container start, see:
// https://github.com/qdm12/gluetun/issues/1241#issuecomment-1333405949 // https://github.com/qdm12/gluetun/issues/1241#issuecomment-1333405949
for _, route := range routes { for _, route := range routes {
sourceIsIPv6 := route.Src.IsValid() && route.Src.Is6()
destinationIsIPv6 := route.Dst.IsValid() && route.Dst.Addr().Is6()
if sourceIsIPv6 || destinationIsIPv6 {
link, err := n.LinkByIndex(route.LinkIndex) link, err := n.LinkByIndex(route.LinkIndex)
if err != nil { if err != nil {
return false, fmt.Errorf("finding IPv6 supported link: %w", err) return false, fmt.Errorf("finding link corresponding to route: %w", err)
} }
sourceIsIPv6 := route.Src.IsValid() && route.Src.Is6()
destinationIsIPv6 := route.Dst.IsValid() && route.Dst.Addr().Is6()
switch {
case !sourceIsIPv6 && !destinationIsIPv6,
destinationIsIPv6 && route.Dst.Addr().IsLoopback():
continue
}
n.debugLogger.Debugf("IPv6 is supported by link %s", link.Name) n.debugLogger.Debugf("IPv6 is supported by link %s", link.Name)
return true, nil return true, nil
} }
}
n.debugLogger.Debugf("IPv6 is not supported after searching %d routes", n.debugLogger.Debugf("IPv6 is not supported after searching %d routes",
len(routes)) len(routes))