コード例 #1
0
static void
foreach_route_cb (struct nl_object *object, void *user_data)
{
	ForeachRouteInfo *info = user_data;
	struct rtnl_route *route = (struct rtnl_route *) object;
	struct nl_addr *dst;

	if (info->out_route)
		return;

	if (nm_logging_level_enabled (LOGL_DEBUG))
		dump_route (route);

	if (   info->ifindex > 0
	    && rtnl_route_get_oif (route) != info->ifindex)
		return;

	if (   info->scope != RT_SCOPE_UNIVERSE
	    && rtnl_route_get_scope (route) != info->scope)
		return;

	if (   info->family != AF_UNSPEC
	    && rtnl_route_get_family (route) != info->family)
		return;

	dst = rtnl_route_get_dst (route);

	/* Check for IPv6 LL and MC routes that might need to be ignored */
	if (   (info->family == AF_INET6 || info->family == AF_UNSPEC)
	    && (rtnl_route_get_family (route) == AF_INET6)) {
		struct in6_addr *addr = NULL;

		if (dst)
			addr = nl_addr_get_binary_addr (dst);
		if (addr) {
			if (   IN6_IS_ADDR_LINKLOCAL (addr)
			    || IN6_IS_ADDR_MC_LINKLOCAL (addr)
			    || (IN6_IS_ADDR_MULTICAST (addr) && (nl_addr_get_prefixlen (dst) == 8)))
				return;
		}
	}

	info->out_route = info->callback (route, dst, info->iface, info->user_data);
	if (info->out_route) {
		/* Ref the route so it sticks around after the cache is cleared */
		rtnl_route_get (info->out_route);
	}
}
コード例 #2
0
static void
dump_route (struct rtnl_route *route)
{
	char buf6[INET6_ADDRSTRLEN];
	char buf4[INET_ADDRSTRLEN];
	struct nl_addr *nl;
	struct in6_addr *addr6 = NULL;
	struct in_addr *addr4 = NULL;
	int prefixlen = 0;
	const char *sf = "UNSPEC";
	int family = rtnl_route_get_family (route);
	guint32 log_level = LOGD_IP4 | LOGD_IP6;

	memset (buf6, 0, sizeof (buf6));
	memset (buf4, 0, sizeof (buf4));
	nl = rtnl_route_get_dst (route);
	if (nl) {
		if (nl_addr_get_family (nl) == AF_INET) {
			addr4 = nl_addr_get_binary_addr (nl);
			if (addr4)
				inet_ntop (AF_INET, addr4, &buf4[0], sizeof (buf4));
		} else if (nl_addr_get_family (nl) == AF_INET6) {
			addr6 = nl_addr_get_binary_addr (nl);
			if (addr6)
				inet_ntop (AF_INET6, addr6, &buf6[0], sizeof (buf6));
		}
		prefixlen = nl_addr_get_prefixlen (nl);
	}

	if (family == AF_INET) {
		sf = "INET";
		log_level = LOGD_IP4;
	} else if (family == AF_INET6) {
		sf = "INET6";
		log_level = LOGD_IP6;
	}

	nm_log_dbg (log_level, "  route idx %d family %s (%d) addr %s/%d",
	            rtnl_route_get_oif (route),
	            sf, family,
	            strlen (buf4) ? buf4 : (strlen (buf6) ? buf6 : "<unknown>"),
	            prefixlen);
}
コード例 #3
0
ファイル: nm-ip6-manager.c プロジェクト: binli/NetworkManager
NMIP6Config *
nm_ip6_manager_get_ip6_config (NMIP6Manager *manager, int ifindex)
{
	NMIP6ManagerPrivate *priv;
	NMIP6Device *device;
	NMIP6Config *config;
	struct rtnl_addr *rtnladdr;
	struct nl_addr *nladdr;
	struct in6_addr *addr;
	NMIP6Address *ip6addr;
	struct rtnl_route *rtnlroute;
	struct nl_addr *nldest, *nlgateway;
	struct in6_addr *dest, *gateway;
	gboolean defgw_set = FALSE;
	struct in6_addr defgw;
	uint32_t metric;
	NMIP6Route *ip6route;
	int i;

	g_return_val_if_fail (NM_IS_IP6_MANAGER (manager), NULL);
	g_return_val_if_fail (ifindex > 0, NULL);

	priv = NM_IP6_MANAGER_GET_PRIVATE (manager);

	device = (NMIP6Device *) g_hash_table_lookup (priv->devices,
	                                              GINT_TO_POINTER (ifindex));
	if (!device) {
		nm_log_warn (LOGD_IP6, "(%d): addrconf not started.", ifindex);
		return NULL;
	}

	config = nm_ip6_config_new ();
	if (!config) {
		nm_log_err (LOGD_IP6, "(%s): out of memory creating IP6 config object.",
		            device->iface);
		return NULL;
	}

	/* Make sure we refill the route and address caches, otherwise we won't get
	 * up-to-date information here since the netlink route/addr change messages
	 * may be lagging a bit.
	 */
	nl_cache_refill (priv->nlh, priv->route_cache);
	nl_cache_refill (priv->nlh, priv->addr_cache);

	/* Add routes */
	for (rtnlroute = FIRST_ROUTE (priv->route_cache); rtnlroute; rtnlroute = NEXT_ROUTE (rtnlroute)) {
		/* Make sure it's an IPv6 route for this device */
		if (rtnl_route_get_oif (rtnlroute) != device->ifindex)
			continue;
		if (rtnl_route_get_family (rtnlroute) != AF_INET6)
			continue;

		nldest = rtnl_route_get_dst (rtnlroute);
		if (!nldest || nl_addr_get_family (nldest) != AF_INET6)
			continue;
		dest = nl_addr_get_binary_addr (nldest);

		nlgateway = rtnl_route_get_gateway (rtnlroute);
		if (!nlgateway || nl_addr_get_family (nlgateway) != AF_INET6)
			continue;
		gateway = nl_addr_get_binary_addr (nlgateway);

		if (rtnl_route_get_dst_len (rtnlroute) == 0) {
			/* Default gateway route; don't add to normal routes but to each address */
			if (!defgw_set) {
				memcpy (&defgw, gateway, sizeof (defgw));
				defgw_set = TRUE;
			}
			continue;
		}

		/* Also ignore link-local routes where the destination and gateway are
		 * the same, which apparently get added by the kernel but return -EINVAL
		 * when we try to add them via netlink.
		 */
		if (gateway && IN6_ARE_ADDR_EQUAL (dest, gateway))
			continue;

		ip6route = nm_ip6_route_new ();
		nm_ip6_route_set_dest (ip6route, dest);
		nm_ip6_route_set_prefix (ip6route, rtnl_route_get_dst_len (rtnlroute));
		nm_ip6_route_set_next_hop (ip6route, gateway);
		rtnl_route_get_metric(rtnlroute, 1, &metric);
		if (metric != UINT_MAX)
			nm_ip6_route_set_metric (ip6route, metric);
		nm_ip6_config_take_route (config, ip6route);
	}

	/* Add addresses */
	for (rtnladdr = FIRST_ADDR (priv->addr_cache); rtnladdr; rtnladdr = NEXT_ADDR (rtnladdr)) {
		if (rtnl_addr_get_ifindex (rtnladdr) != device->ifindex)
			continue;

		nladdr = rtnl_addr_get_local (rtnladdr);
		if (!nladdr || nl_addr_get_family (nladdr) != AF_INET6)
			continue;

		addr = nl_addr_get_binary_addr (nladdr);
		ip6addr = nm_ip6_address_new ();
		nm_ip6_address_set_prefix (ip6addr, rtnl_addr_get_prefixlen (rtnladdr));
		nm_ip6_address_set_address (ip6addr, addr);
		nm_ip6_config_take_address (config, ip6addr);
		if (defgw_set)
			nm_ip6_address_set_gateway (ip6addr, &defgw);
	}

	/* Add DNS servers */
	if (device->rdnss_servers) {
		NMIP6RDNSS *rdnss = (NMIP6RDNSS *)(device->rdnss_servers->data);

		for (i = 0; i < device->rdnss_servers->len; i++)
			nm_ip6_config_add_nameserver (config, &rdnss[i].addr);
	}

	/* Add DNS domains */
	if (device->dnssl_domains) {
		NMIP6DNSSL *dnssl = (NMIP6DNSSL *)(device->dnssl_domains->data);

		for (i = 0; i < device->dnssl_domains->len; i++)
			nm_ip6_config_add_domain (config, dnssl[i].domain);
	}

	return config;
}
コード例 #4
0
ファイル: tap_routing.c プロジェクト: bishneet/signpostd
CAMLprim value
ocaml_get_routing_table(value unit) {
    CAMLparam1(unit);
    CAMLlocal3( ret, tmp, entry );

    struct nl_sock *fd;
    struct nl_cache *res, *links;
    struct rtnl_route *it;
    uint32 i_ip, netmask = 0, mask_len, gw;
    int i;
    struct nl_addr *ip;
    char device_name[IFNAMSIZ];
    struct rtnl_nexthop *to;
    fd = nl_socket_alloc();
    if (!fd) {
        fprintf(stderr, "error nl_socket_alloc\n");
        exit(1);
    }

    if(nl_connect(fd, NETLINK_ROUTE) < 0) {
        fprintf(stderr, "error nl_connect\n");
        exit(1);
    }

    ret = Val_emptylist;

    if(rtnl_route_alloc_cache(fd, AF_UNSPEC, 0, &res) < 0) {
        fprintf(stderr, "error rtnl_route_alloc_cache");
        exit(1);
    }

    if(rtnl_link_alloc_cache (fd, AF_UNSPEC, &links) < 0) {
        fprintf(stderr, "error rtnl_link_alloc_cache");
        exit(1);
    }

    it = (struct rtnl_route *)nl_cache_get_first(res);
    for(; it != NULL; it = (struct rtnl_route *)
                           nl_cache_get_next((struct nl_object *)it) ) {
        if(rtnl_route_get_family (it) == AF_INET) {
            ip = rtnl_route_get_dst(it);
            i_ip = ntohl(*(int *)nl_addr_get_binary_addr(ip));
            mask_len = nl_addr_get_prefixlen(ip);
            for(i = 0; i < 32; i++)
                netmask = (netmask << 1) + (i< mask_len?1:0);
            to = rtnl_route_nexthop_n(it, 0);
            rtnl_link_i2name(links, rtnl_route_nh_get_ifindex(to),
                             device_name, IFNAMSIZ);
            if ( rtnl_route_nh_get_gateway (to) != NULL)
                gw = ntohl(*(int *)nl_addr_get_binary_addr(
                               rtnl_route_nh_get_gateway (to)));
            else
                gw = 0;
            /*printf("src ip:%x mask:%x gw:%x dev:%s\n", i_ip, netmask, */
            /*gw, device_name);*/

            entry = caml_alloc(7,0);
            Store_field(entry, 0, Val_int(i_ip & 0xFFFF));
            Store_field(entry, 1, Val_int(i_ip >> 16));
            Store_field(entry, 2, Val_int(netmask & 0xFFFF));
            Store_field(entry, 3, Val_int(netmask >> 16));
            Store_field(entry, 4, Val_int(gw & 0xFFFF));
            Store_field(entry, 5, Val_int(gw >> 16));
            Store_field(entry, 6, caml_copy_string(device_name));

            // store in list
            tmp =  caml_alloc(2, 0);
            Store_field( tmp, 0, entry);  // head
            Store_field( tmp, 1, ret);  // tail
            ret = tmp;
        }
    }