in_canforward     618 netinet/in.h   int	   in_canforward(struct in_addr);
in_canforward     642 netinet/ip_icmp.c 	if (!in_canforward(ip->ip_src) &&
in_canforward    1449 netinet/ip_input.c 	if (m->m_flags & M_BCAST || in_canforward(ip->ip_dst) == 0) {