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hotfix(pmtud): only set MSS on non-local VPN routes

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This commit is contained in:
Quentin McGaw
2026-03-10 11:51:59 +00:00
parent d790e3385c
commit 1d29f1f517
1 changed files with 12 additions and 1 deletions
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internal/routing/vpn.go
+12 -1
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@@ -50,6 +50,8 @@ func (r *Routing) VPNLocalGatewayIP(vpnIntf string) (ip netip.Addr, err error) {
var ErrVPNRouteNotFound = errors.New("VPN route not found")
// VPNRoutes returns the routes that are using the VPN interface, excluding local routes
// and link-local multicast and unicast routes.
func (r *Routing) VPNRoutes(vpnIntf string) (routes []netlink.Route, err error) {
vpnLink, err := r.netLinker.LinkByName(vpnIntf)
if err != nil {
@@ -63,7 +65,16 @@ func (r *Routing) VPNRoutes(vpnIntf string) (routes []netlink.Route, err error)
}
routes = make([]netlink.Route, 0, len(allRoutes))
for _, route := range allRoutes {
if route.LinkIndex == vpnLinkIndex {
const localTable = 255
switch {
case route.LinkIndex != vpnLinkIndex,
route.Table == localTable:
continue
case !route.Dst.IsValid(), route.Dst.Addr().IsUnspecified():
routes = append(routes, route)
case route.Dst.Addr().IsLinkLocalMulticast(), route.Dst.Addr().IsLinkLocalUnicast():
continue
case !route.Dst.Addr().IsPrivate():
routes = append(routes, route)
}
}