Defined in 2 files as a macro:

• contrib/tcpdump/ip6.h, line 135 (as a macro)
• sys/netinet/ip6.h, line 137 (as a macro)

Referenced in 5 files:

• contrib/tcpdump/print-ip6opts.c, line 130
• sbin/ping6/ping6.c, line 1943
• sys/netinet6/ip6_input.c, line 1037
• sys/netinet6/ip6_output.c, line 1398
• sys/netpfil/pf/pf_norm.c, line 1240