Defined in 2 files as a macro:

• bsd/netinet/ip6.h, line 220 (as a macro)
• bsd/netinet/ip6.h, line 224 (as a macro)

Referenced in 3 files:

• bsd/netinet6/frag6.c, line 262
• bsd/netinet6/icmp6.c, line 1007
• bsd/netinet6/ip6_input.c, line 1568