net/ipv4/ipmr.c

2348 	struct igmphdr *pim;
2352 	if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr)))
2355 	pim = igmp_hdr(skb);
2361 	    pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER)
2364 	if (__pim_rcv(mrt, skb, sizeof(*pim))) {
2375 	struct pimreghdr *pim;
2379 	if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr)))
2382 	pim = (struct pimreghdr *)skb_transport_header(skb);
2383 	if (pim->type != ((PIM_VERSION << 4) | (PIM_TYPE_REGISTER)) ||
2384 	    (pim->flags & PIM_NULL_REGISTER) ||
2385 	    (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 &&
2392 	if (__pim_rcv(mrt, skb, sizeof(*pim))) {