Defined in 4 files as a macro:

• contrib/tcpdump/ip.h, line 110 (as a macro)
• sys/contrib/ipfilter/netinet/ip_compat.h, line 794 (as a macro)
• sys/contrib/ipfilter/netinet/ip_compat.h, line 887 (as a macro)
• sys/netinet/ip.h, line 158 (as a macro)

Referenced in 6 files:

• contrib/ipfilter/ipsend/ipsopt.c
  • line 45
  • line 129
• contrib/ipfilter/ipsend/iptests.c, line 524
• contrib/ipfilter/lib/addipopt.c, line 54
• contrib/ipfilter/lib/ionames.c, line 27
• sys/contrib/ipfilter/netinet/fil.c, line 208
• sys/contrib/ipfilter/netinet/ip_compat.h
  • line 793
  • line 796
  • line 886