icp6s_checksum   5331 net/pf.c       			icmp6stat.icp6s_checksum++;
icp6s_checksum    538 netinet/icmp6.h 	u_int64_t icp6s_checksum;	/* bad checksum */
icp6s_checksum    459 netinet6/icmp6.c 		icmp6stat.icp6s_checksum++;