pim_cksum        3146 netinet/ip_mroute.c 	pimhdr->pim.pim_cksum = in_cksum(mb_first, sizeof(pim_encap_pimhdr));
pim_cksum          76 netinet/pim.h  	uint16_t	pim_cksum;	/* IP-style checksum		*/
pim_cksum          57 netinet6/pim6.h 	u_short	pim_cksum;	/* IP style check sum */