Symbol: GRE_VERS_1
sys/net/if_gre.c
1110
case htons(GRE_VERS_1):
sys/net/if_gre.c
3972
gh->gre_flags = htons(GRE_VERS_1 | GRE_KP);
sys/net/if_gre.c
4079
if (gh->gre_flags != htons(GRE_KP | GRE_VERS_1))