GRE_KP
if ((gh->gre_flags & htons(~(GRE_KP|GRE_VERS_MASK))) != htons(0))
if (gh->gre_flags & htons(GRE_KP)) {
gh->gre_flags |= htons(GRE_KP);
gh->gre_flags = htons(GRE_VERS_1 | GRE_KP);
if (gh->gre_flags != htons(GRE_KP | GRE_VERS_1))
(flags & GRE_KP) ? "K" : "",
if (flags & GRE_KP) {
(flags & GRE_KP) ? "K" : "",
if ((flags & GRE_KP) == 0) {
if (flags != GRE_KP) {