Defined in 2 files as a macro:

• bsd/netinet/ip.h, line 91 (as a macro)
• osfmk/kdp/kdp_udp.h, line 103 (as a macro)

Referenced in 3 files:

• bsd/netinet/ip_compat.h
  • line 105
  • line 106
• bsd/netinet/ip_input.c, line 774
• bsd/netinet6/ipsec.c
  • line 978
  • line 2151