Defined in 2 files as a macro:

• bsd/netinet/ip6.h, line 315 (as a macro)
• bsd/netinet/ip6.h, line 319 (as a macro)

Referenced in 4 files:

• bsd/netinet6/frag6.c, line 269
• bsd/netinet6/icmp6.c, line 931
• bsd/netinet6/ip6_fw.c, line 252
• bsd/netinet6/ip6_input.c, line 1756