C++ (Cpp) arp_req_set_public 예제들

예제 #1

static int arp_req_set(struct net *net, struct arpreq *r,
		       struct net_device *dev)
{
	__be32 ip;
	struct neighbour *neigh;
	int err;

	if (r->arp_flags & ATF_PUBL)
		return arp_req_set_public(net, r, dev);

	ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
	if (r->arp_flags & ATF_PERM)
		r->arp_flags |= ATF_COM;
	if (dev == NULL) {
		struct flowi fl = { .nl_u.ip4_u = { .daddr = ip,
						    .tos = RTO_ONLINK } };
		struct rtable *rt;
		err = ip_route_output_key(net, &rt, &fl);
		if (err != 0)
			return err;
		dev = rt->dst.dev;
		ip_rt_put(rt);
		if (!dev)
			return -EINVAL;
	}
	switch (dev->type) {
#if defined(CONFIG_FDDI) || defined(CONFIG_FDDI_MODULE)
	case ARPHRD_FDDI:
		/*
		 * According to RFC 1390, FDDI devices should accept ARP
		 * hardware types of 1 (Ethernet).  However, to be more
		 * robust, we'll accept hardware types of either 1 (Ethernet)
		 * or 6 (IEEE 802.2).
		 */
		if (r->arp_ha.sa_family != ARPHRD_FDDI &&
		    r->arp_ha.sa_family != ARPHRD_ETHER &&
		    r->arp_ha.sa_family != ARPHRD_IEEE802)
			return -EINVAL;
		break;
#endif
	default:
		if (r->arp_ha.sa_family != dev->type)
			return -EINVAL;
		break;
	}

	neigh = __neigh_lookup_errno(&arp_tbl, &ip, dev);
	err = PTR_ERR(neigh);
	if (!IS_ERR(neigh)) {
		unsigned state = NUD_STALE;
		if (r->arp_flags & ATF_PERM)
			state = NUD_PERMANENT;
		err = neigh_update(neigh, (r->arp_flags & ATF_COM) ?
				   r->arp_ha.sa_data : NULL, state,
				   NEIGH_UPDATE_F_OVERRIDE |
				   NEIGH_UPDATE_F_ADMIN);
		neigh_release(neigh);
	}
	return err;
}

예제 #2

파일: arp.c 프로젝트: Alex-V2/One_M8_4.4.3_kernel

static int arp_req_set(struct net *net, struct arpreq *r,
		       struct net_device *dev)
{
	__be32 ip;
	struct neighbour *neigh;
	int err;

	if (r->arp_flags & ATF_PUBL)
		return arp_req_set_public(net, r, dev);

	ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
	if (r->arp_flags & ATF_PERM)
		r->arp_flags |= ATF_COM;
	if (dev == NULL) {
		struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0);

		if (IS_ERR(rt))
			return PTR_ERR(rt);
		dev = rt->dst.dev;
		ip_rt_put(rt);
		if (!dev)
			return -EINVAL;
	}
	switch (dev->type) {
#if IS_ENABLED(CONFIG_FDDI)
	case ARPHRD_FDDI:
		if (r->arp_ha.sa_family != ARPHRD_FDDI &&
		    r->arp_ha.sa_family != ARPHRD_ETHER &&
		    r->arp_ha.sa_family != ARPHRD_IEEE802)
			return -EINVAL;
		break;
#endif
	default:
		if (r->arp_ha.sa_family != dev->type)
			return -EINVAL;
		break;
	}

	neigh = __neigh_lookup_errno(&arp_tbl, &ip, dev);
	err = PTR_ERR(neigh);
	if (!IS_ERR(neigh)) {
		unsigned state = NUD_STALE;
		if (r->arp_flags & ATF_PERM)
			state = NUD_PERMANENT;
		err = neigh_update(neigh, (r->arp_flags & ATF_COM) ?
				   r->arp_ha.sa_data : NULL, state,
				   NEIGH_UPDATE_F_OVERRIDE |
				   NEIGH_UPDATE_F_ADMIN);
		neigh_release(neigh);
	}
	return err;
}