3492 static int packet_mc_add(struct sock *sk, struct packet_mreq_max *mreq)  in packet_mc_add()  argument
3502 	dev = __dev_get_by_index(sock_net(sk), mreq->mr_ifindex);  in packet_mc_add()
3507 	if (mreq->mr_alen > dev->addr_len)  in packet_mc_add()
3517 		if (ml->ifindex == mreq->mr_ifindex &&  in packet_mc_add()
3518 		    ml->type == mreq->mr_type &&  in packet_mc_add()
3519 		    ml->alen == mreq->mr_alen &&  in packet_mc_add()
3520 		    memcmp(ml->addr, mreq->mr_address, ml->alen) == 0) {  in packet_mc_add()
3528 	i->type = mreq->mr_type;  in packet_mc_add()
3529 	i->ifindex = mreq->mr_ifindex;  in packet_mc_add()
3530 	i->alen = mreq->mr_alen;  in packet_mc_add()
3531 	memcpy(i->addr, mreq->mr_address, i->alen);  in packet_mc_add()
3547 static int packet_mc_drop(struct sock *sk, struct packet_mreq_max *mreq)  in packet_mc_drop()  argument
3554 		if (ml->ifindex == mreq->mr_ifindex &&  in packet_mc_drop()
3555 		    ml->type == mreq->mr_type &&  in packet_mc_drop()
3556 		    ml->alen == mreq->mr_alen &&  in packet_mc_drop()
3557 		    memcmp(ml->addr, mreq->mr_address, ml->alen) == 0) {  in packet_mc_drop()
3608 		struct packet_mreq_max mreq;  in packet_setsockopt()  local
3610 		memset(&mreq, 0, sizeof(mreq));  in packet_setsockopt()
3613 		if (len > sizeof(mreq))  in packet_setsockopt()
3614 			len = sizeof(mreq);  in packet_setsockopt()
3615 		if (copy_from_user(&mreq, optval, len))  in packet_setsockopt()
3617 		if (len < (mreq.mr_alen + offsetof(struct packet_mreq, mr_address)))  in packet_setsockopt()
3620 			ret = packet_mc_add(sk, &mreq);  in packet_setsockopt()
3622 			ret = packet_mc_drop(sk, &mreq);  in packet_setsockopt()