Defined in 4 files as a macro:

• contrib/tcpdump/ip.h, line 106 (as a macro)
• sys/contrib/ipfilter/netinet/ip_compat.h, line 791 (as a macro)
• sys/contrib/ipfilter/netinet/ip_compat.h, line 1068 (as a macro)
• sys/netinet/ip.h, line 153 (as a macro)

Referenced in 10 files:

• contrib/ipfilter/ipsend/ipsopt.c
  • line 42
  • line 107
• contrib/ipfilter/ipsend/iptests.c
  • line 486
  • line 510
• contrib/ipfilter/lib/addipopt.c, line 45
• contrib/ipfilter/lib/ionames.c, line 20
• contrib/tcpdump/print-ip.c
  • line 44
  • line 287
• sys/contrib/ipfilter/netinet/fil.c, line 200
• sys/contrib/ipfilter/netinet/ip_compat.h
  • line 790
  • line 1067
• sys/netinet/ip_icmp.c, line 889
• sys/netinet/ip_options.c, line 315
• sys/netpfil/ipfw/ip_fw2.c, line 325