Defined in 2 files as a macro:

• external/bsd/tcpdump/dist/ip6.h, line 131 (as a macro)
• sys/netinet/ip6.h, line 156 (as a macro)

Referenced in 5 files:

• external/bsd/tcpdump/dist/print-ip6opts.c, line 135
• sbin/ping6/ping6.c, line 1627
• sys/dist/pf/net/pf_norm.c, line 1190
• sys/netinet6/ip6_input.c, line 924
• sys/netinet6/ip6_output.c, line 1163