Defined in 3 files as a macro:

• external/bsd/tcpdump/dist/ip.h, line 154 (as a macro)
• external/mpl/dhcp/dist/includes/netinet/ip.h, line 156 (as a macro)
• sys/netinet/ip.h, line 231 (as a macro)

Referenced in 6 files:

• sbin/ping/ping.c, line 573
• sys/netinet/ip_icmp.c, line 852
• sys/netinet/ip_output.c
  • line 1133
  • line 2016
• sys/netinet/raw_ip.c, line 342
• sys/netinet/sctp_output.c
  • line 8081
  • line 9001
  • line 9169
• usr.sbin/mrouted/igmp.c, line 62