Defined in 1 files as a macro:

• bsd/netinet/ip_var.h, line 114 (as a macro)

Referenced in 4 files:

• bsd/netinet/ip_input.c, line 387
• bsd/netinet/ip_output.c, line 2910
• bsd/netinet/ip_var.h, line 118
• bsd/netinet/tcp_input.c, line 2840