Defined in 1 files as a macro:

• include/uapi/linux/if_tunnel.h, line 44 (as a macro)

Referenced in 3 files:

• drivers/net/ppp/pptp.c
  • line 210
  • line 361
• net/core/flow_dissector.c, line 409
• net/netfilter/nf_conntrack_proto_gre.c, line 215