3399 static int packet_mc_add(struct sock *sk, struct packet_mreq_max *mreq)  in packet_mc_add()  argument
3409 	dev = __dev_get_by_index(sock_net(sk), mreq->mr_ifindex);  in packet_mc_add()
3414 	if (mreq->mr_alen > dev->addr_len)  in packet_mc_add()
3424 		if (ml->ifindex == mreq->mr_ifindex &&  in packet_mc_add()
3425 		    ml->type == mreq->mr_type &&  in packet_mc_add()
3426 		    ml->alen == mreq->mr_alen &&  in packet_mc_add()
3427 		    memcmp(ml->addr, mreq->mr_address, ml->alen) == 0) {  in packet_mc_add()
3435 	i->type = mreq->mr_type;  in packet_mc_add()
3436 	i->ifindex = mreq->mr_ifindex;  in packet_mc_add()
3437 	i->alen = mreq->mr_alen;  in packet_mc_add()
3438 	memcpy(i->addr, mreq->mr_address, i->alen);  in packet_mc_add()
3454 static int packet_mc_drop(struct sock *sk, struct packet_mreq_max *mreq)  in packet_mc_drop()  argument
3461 		if (ml->ifindex == mreq->mr_ifindex &&  in packet_mc_drop()
3462 		    ml->type == mreq->mr_type &&  in packet_mc_drop()
3463 		    ml->alen == mreq->mr_alen &&  in packet_mc_drop()
3464 		    memcmp(ml->addr, mreq->mr_address, ml->alen) == 0) {  in packet_mc_drop()
3515 		struct packet_mreq_max mreq;  in packet_setsockopt()  local
3517 		memset(&mreq, 0, sizeof(mreq));  in packet_setsockopt()
3520 		if (len > sizeof(mreq))  in packet_setsockopt()
3521 			len = sizeof(mreq);  in packet_setsockopt()
3522 		if (copy_from_user(&mreq, optval, len))  in packet_setsockopt()
3524 		if (len < (mreq.mr_alen + offsetof(struct packet_mreq, mr_address)))  in packet_setsockopt()
3527 			ret = packet_mc_add(sk, &mreq);  in packet_setsockopt()
3529 			ret = packet_mc_drop(sk, &mreq);  in packet_setsockopt()