ip4_input         178 netinet/in_gif.c 	ip4_input(m, off); /* No GIF interface was configured */
ip4_input         217 netinet/in_proto.c   ip4_input,	rip_output,	0,		rip_ctloutput,
ip4_input         223 netinet/in_proto.c   ip4_input,	rip_output, 	0,		rip_ctloutput,
ip4_input         535 netinet/ip_ipsp.h extern void ip4_input(struct mbuf *, ...);