mirror of
https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
synced 2026-01-10 04:40:20 +01:00
shared: merge branch 'th/shared-address-range'
https://github.com/NetworkManager/NetworkManager/pull/20
This commit is contained in:
Thomas Haller
commit
c244cc9415
3 changed files with 235 additions and 117 deletions
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@ -5844,66 +5844,63 @@ nm_device_dhcp4_renew (NMDevice *self, gboolean release)
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static GHashTable *shared_ips = NULL;
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static void
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release_shared_ip (gpointer data)
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shared_ip_release (gpointer data)
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{
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g_hash_table_remove (shared_ips, data);
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}
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static gboolean
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reserve_shared_ip (NMDevice *self, NMSettingIPConfig *s_ip4, NMPlatformIP4Address *address)
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{
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if (G_UNLIKELY (shared_ips == NULL))
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shared_ips = g_hash_table_new (g_direct_hash, g_direct_equal);
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memset (address, 0, sizeof (*address));
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if (s_ip4 && nm_setting_ip_config_get_num_addresses (s_ip4)) {
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/* Use the first user-supplied address */
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NMIPAddress *user = nm_setting_ip_config_get_address (s_ip4, 0);
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in_addr_t a;
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g_assert (user);
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nm_ip_address_get_address_binary (user, &a);
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nm_platform_ip4_address_set_addr (address, a, nm_ip_address_get_prefix (user));
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} else {
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/* Find an unused address in the 10.42.x.x range */
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guint32 start = (guint32) ntohl (0x0a2a0001); /* 10.42.0.1 */
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guint32 count = 0;
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while (g_hash_table_lookup (shared_ips, GUINT_TO_POINTER (start + count))) {
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count += ntohl (0x100);
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if (count > ntohl (0xFE00)) {
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_LOGE (LOGD_SHARING, "ran out of shared IP addresses!");
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return FALSE;
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}
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}
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nm_platform_ip4_address_set_addr (address, start + count, 24);
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g_hash_table_add (shared_ips, GUINT_TO_POINTER (address->address));
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}
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return TRUE;
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if (!g_hash_table_size (shared_ips))
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g_clear_pointer (&shared_ips, g_hash_table_unref);
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}
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static NMIP4Config *
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shared4_new_config (NMDevice *self, NMConnection *connection)
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{
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NMIP4Config *config = NULL;
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NMPlatformIP4Address address;
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gboolean is_generated = FALSE;
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NMSettingIPConfig *s_ip4;
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NMPlatformIP4Address address = {
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.addr_source = NM_IP_CONFIG_SOURCE_SHARED,
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};
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g_return_val_if_fail (self != NULL, NULL);
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g_return_val_if_fail (self, NULL);
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g_return_val_if_fail (connection, NULL);
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if (!reserve_shared_ip (self, nm_connection_get_setting_ip4_config (connection), &address))
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return NULL;
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s_ip4 = nm_connection_get_setting_ip4_config (connection);
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if (s_ip4 && nm_setting_ip_config_get_num_addresses (s_ip4)) {
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/* Use the first user-supplied address */
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NMIPAddress *user = nm_setting_ip_config_get_address (s_ip4, 0);
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in_addr_t a;
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nm_ip_address_get_address_binary (user, &a);
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nm_platform_ip4_address_set_addr (&address, a, nm_ip_address_get_prefix (user));
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} else {
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/* Find an unused address in the 10.42.x.x range */
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guint32 start = (guint32) ntohl (0x0a2a0001); /* 10.42.0.1 */
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guint32 count = 0;
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if (G_UNLIKELY (!shared_ips))
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shared_ips = g_hash_table_new (g_direct_hash, g_direct_equal);
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else {
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while (g_hash_table_lookup (shared_ips, GUINT_TO_POINTER (start + count))) {
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count += ntohl (0x100);
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if (count > ntohl (0xFE00)) {
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_LOGE (LOGD_SHARING, "ran out of shared IP addresses!");
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return FALSE;
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}
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}
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}
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nm_platform_ip4_address_set_addr (&address, start + count, 24);
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g_hash_table_add (shared_ips, GUINT_TO_POINTER (address.address));
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is_generated = TRUE;
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}
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config = nm_ip4_config_new (nm_device_get_ip_ifindex (self));
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address.addr_source = NM_IP_CONFIG_SOURCE_SHARED;
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nm_ip4_config_add_address (config, &address);
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/* Remove the address lock when the object gets disposed */
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g_object_set_qdata_full (G_OBJECT (config), NM_CACHED_QUARK ("shared-ip"),
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GUINT_TO_POINTER (address.address),
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release_shared_ip);
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if (is_generated) {
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/* Remove the address lock when the object gets disposed */
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g_object_set_qdata_full (G_OBJECT (config), NM_CACHED_QUARK ("shared-ip"),
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GUINT_TO_POINTER (address.address),
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shared_ip_release);
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}
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return config;
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}
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@ -35,11 +35,12 @@ nm_dnsmasq_utils_get_range (const NMPlatformIP4Address *addr,
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{
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guint32 host = addr->address;
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guint8 prefix = addr->plen;
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guint32 netmask = nm_utils_ip4_prefix_to_netmask (prefix);
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guint32 first, last, reserved;
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guint32 netmask;
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guint32 first, last, mid, reserved;
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const guint32 NUM = 256;
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g_return_val_if_fail (out_first != NULL, FALSE);
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g_return_val_if_fail (out_last != NULL, FALSE);
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g_return_val_if_fail (out_first, FALSE);
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g_return_val_if_fail (out_last, FALSE);
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if (prefix > 30) {
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if (out_error_desc)
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@ -47,29 +48,69 @@ nm_dnsmasq_utils_get_range (const NMPlatformIP4Address *addr,
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return FALSE;
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}
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/* Find the first available address *after* the local machine's IP */
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first = (host & netmask) + htonl (1);
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/* Shortcut: allow a max of 253 addresses; the - htonl(1) here is to assure
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* that we don't set 'last' to the broadcast address of the network. */
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if (prefix < 24)
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last = (host | ~nm_utils_ip4_prefix_to_netmask (24)) - htonl (1);
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else
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last = (host | ~netmask) - htonl(1);
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/* Figure out which range (either above the host address or below it)
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* has more addresses. Reserve some addresses for static IPs.
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*/
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if (ntohl (host) - ntohl (first) > ntohl (last) - ntohl (host)) {
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/* Range below the host's IP address */
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reserved = (guint32) ((ntohl (host) - ntohl (first)) / 10);
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last = host - htonl (MIN (reserved, 8)) - htonl (1);
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} else {
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/* Range above host's IP address */
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reserved = (guint32) ((ntohl (last) - ntohl (host)) / 10);
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first = host + htonl (MIN (reserved, 8)) + htonl (1);
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if (prefix < 24) {
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/* if the subnet is larger then /24, we partition it and treat it
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* like it would be a /24.
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*
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* Hence, the resulting range will always be between x.x.x.1/24
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* and x.x.x.254/24, with x.x.x.0 being the network address of the
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* host.
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*
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* In this case, only a /24 portion of the subnet is used.
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* No particular reason for that, but it's unlikely that a user
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* would use NetworkManager's shared method when having hundered
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* of DHCP clients. So, restrict the range to the same /24 in
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* which the host address lies.
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*/
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prefix = 24;
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}
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netmask = nm_utils_ip4_prefix_to_netmask (prefix);
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/* treat addresses in host-order from here on. */
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netmask = ntohl (netmask);
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host = ntohl (host);
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/* if host is the network or broadcast address, coerce it to
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* one above or below. Usually, we wouldn't expect the user
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* to pick such an address. */
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if (host == (host & netmask))
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host++;
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else if (host == (host | ~netmask))
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host--;
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/* Exclude the network and broadcast address. */
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first = (host & netmask) + 1;
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last = (host | ~netmask) - 1;
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/* Depending on whether host is above or below the middle of
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* the subnet, the larger part if handed out.
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*
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* If the host is in the lower half, the range starts
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* at the lower end with the host (plus reserved), until the
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* broadcast address
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*
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* If the host is in the upper half, the range starts above
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* the network-address and goes up until the host (except reserved).
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*
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* reserved is up to 8 addresses, 10% of the determined range.
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*/
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mid = (host & netmask) | (((first + last) / 2) & ~netmask);
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if (host > mid) {
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/* use lower range */
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reserved = NM_MIN (((host - first) / 10), 8);
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last = host - 1 - reserved;
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first = NM_MAX (first, last > NUM ? last - NUM : 0);
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} else {
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/* use upper range */
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reserved = NM_MIN (((last - host) / 10), 8);
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first = host + 1 + reserved;
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last = NM_MIN (last, first < 0xFFFFFFFF - NUM ? first + NUM : 0xFFFFFFFF);
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}
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first = htonl (first);
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last = htonl (last);
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nm_utils_inet4_ntop (first, out_first);
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nm_utils_inet4_ntop (last, out_last);
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@ -29,58 +29,138 @@
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static void
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test_address_ranges (void)
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{
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NMPlatformIP4Address addr;
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char first[INET_ADDRSTRLEN];
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char last[INET_ADDRSTRLEN];
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char *error_desc = NULL;
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#define _test_address_range(addr, plen, expected_first, expected_last) \
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G_STMT_START { \
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char *_error_desc = NULL; \
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char _first[INET_ADDRSTRLEN]; \
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char _last[INET_ADDRSTRLEN]; \
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\
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if (!nm_dnsmasq_utils_get_range (nmtst_platform_ip4_address ((addr""), NULL, (plen)), \
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_first, _last, &_error_desc)) \
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g_assert_not_reached (); \
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g_assert (!_error_desc); \
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g_assert_cmpstr (_first, ==, (expected_first"")); \
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g_assert_cmpstr (_last, ==, (expected_last"")); \
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g_assert_cmpint ((ntohl (nmtst_inet4_from_string (_last)) - ntohl (nmtst_inet4_from_string (_first))), <=, 244); \
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} G_STMT_END
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addr = *nmtst_platform_ip4_address ("192.168.0.1", NULL, 24);
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g_assert (nm_dnsmasq_utils_get_range (&addr, first, last, &error_desc));
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g_assert (error_desc == NULL);
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g_assert_cmpstr (first, ==, "192.168.0.10");
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g_assert_cmpstr (last, ==, "192.168.0.254");
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#define _test_address_range_fail(addr, plen) \
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G_STMT_START { \
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char *_error_desc = NULL; \
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char _first[INET_ADDRSTRLEN]; \
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char _last[INET_ADDRSTRLEN]; \
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\
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if (nm_dnsmasq_utils_get_range (nmtst_platform_ip4_address ((addr""), NULL, (plen)), \
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_first, _last, &_error_desc)) \
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g_assert_not_reached (); \
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g_assert (_error_desc); \
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g_free (_error_desc); \
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} G_STMT_END
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addr = *nmtst_platform_ip4_address ("192.168.0.99", NULL, 24);
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g_assert (nm_dnsmasq_utils_get_range (&addr, first, last, &error_desc));
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g_assert (error_desc == NULL);
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g_assert_cmpstr (first, ==, "192.168.0.108");
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g_assert_cmpstr (last, ==, "192.168.0.254");
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_test_address_range_fail ("1.2.3.1", 31);
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addr = *nmtst_platform_ip4_address ("192.168.0.254", NULL, 24);
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g_assert (nm_dnsmasq_utils_get_range (&addr, first, last, &error_desc));
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g_assert (error_desc == NULL);
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g_assert_cmpstr (first, ==, "192.168.0.1");
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g_assert_cmpstr (last, ==, "192.168.0.245");
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_test_address_range ("0.0.0.0", 30, "0.0.0.2", "0.0.0.2");
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_test_address_range ("0.0.0.1", 30, "0.0.0.2", "0.0.0.2");
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_test_address_range ("0.0.0.2", 30, "0.0.0.1", "0.0.0.1");
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_test_address_range ("0.0.0.3", 30, "0.0.0.1", "0.0.0.1");
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_test_address_range ("1.2.3.0", 30, "1.2.3.2", "1.2.3.2");
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_test_address_range ("1.2.3.1", 30, "1.2.3.2", "1.2.3.2");
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_test_address_range ("1.2.3.2", 30, "1.2.3.1", "1.2.3.1");
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_test_address_range ("1.2.3.3", 30, "1.2.3.1", "1.2.3.1");
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_test_address_range ("1.2.3.4", 30, "1.2.3.6", "1.2.3.6");
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_test_address_range ("1.2.3.5", 30, "1.2.3.6", "1.2.3.6");
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_test_address_range ("1.2.3.6", 30, "1.2.3.5", "1.2.3.5");
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_test_address_range ("1.2.3.7", 30, "1.2.3.5", "1.2.3.5");
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_test_address_range ("1.2.3.8", 30, "1.2.3.10", "1.2.3.10");
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_test_address_range ("1.2.3.9", 30, "1.2.3.10", "1.2.3.10");
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_test_address_range ("255.255.255.0", 30, "255.255.255.2", "255.255.255.2");
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_test_address_range ("255.255.255.1", 30, "255.255.255.2", "255.255.255.2");
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_test_address_range ("255.255.255.2", 30, "255.255.255.1", "255.255.255.1");
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_test_address_range ("255.255.255.3", 30, "255.255.255.1", "255.255.255.1");
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_test_address_range ("255.255.255.248", 30, "255.255.255.250", "255.255.255.250");
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_test_address_range ("255.255.255.249", 30, "255.255.255.250", "255.255.255.250");
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_test_address_range ("255.255.255.250", 30, "255.255.255.249", "255.255.255.249");
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_test_address_range ("255.255.255.251", 30, "255.255.255.249", "255.255.255.249");
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_test_address_range ("255.255.255.252", 30, "255.255.255.254", "255.255.255.254");
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_test_address_range ("255.255.255.253", 30, "255.255.255.254", "255.255.255.254");
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_test_address_range ("255.255.255.254", 30, "255.255.255.253", "255.255.255.253");
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_test_address_range ("255.255.255.255", 30, "255.255.255.253", "255.255.255.253");
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/* Smaller networks */
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addr = *nmtst_platform_ip4_address ("1.2.3.1", NULL, 30);
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g_assert (nm_dnsmasq_utils_get_range (&addr, first, last, &error_desc));
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g_assert (error_desc == NULL);
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g_assert_cmpstr (first, ==, "1.2.3.2");
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g_assert_cmpstr (last, ==, "1.2.3.2");
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_test_address_range ("0.0.0.0", 29, "0.0.0.2", "0.0.0.6");
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_test_address_range ("0.0.0.1", 29, "0.0.0.2", "0.0.0.6");
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_test_address_range ("0.0.0.2", 29, "0.0.0.3", "0.0.0.6");
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_test_address_range ("0.0.0.3", 29, "0.0.0.4", "0.0.0.6");
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_test_address_range ("0.0.0.4", 29, "0.0.0.1", "0.0.0.3");
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_test_address_range ("0.0.0.5", 29, "0.0.0.1", "0.0.0.4");
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_test_address_range ("0.0.0.6", 29, "0.0.0.1", "0.0.0.5");
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_test_address_range ("0.0.0.7", 29, "0.0.0.1", "0.0.0.5");
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_test_address_range ("0.0.0.8", 29, "0.0.0.10", "0.0.0.14");
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_test_address_range ("0.0.0.9", 29, "0.0.0.10", "0.0.0.14");
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_test_address_range ("1.2.3.0", 29, "1.2.3.2", "1.2.3.6");
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_test_address_range ("1.2.3.1", 29, "1.2.3.2", "1.2.3.6");
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_test_address_range ("1.2.3.2", 29, "1.2.3.3", "1.2.3.6");
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_test_address_range ("1.2.3.3", 29, "1.2.3.4", "1.2.3.6");
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_test_address_range ("1.2.3.4", 29, "1.2.3.1", "1.2.3.3");
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_test_address_range ("1.2.3.5", 29, "1.2.3.1", "1.2.3.4");
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_test_address_range ("1.2.3.6", 29, "1.2.3.1", "1.2.3.5");
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_test_address_range ("1.2.3.7", 29, "1.2.3.1", "1.2.3.5");
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_test_address_range ("1.2.3.8", 29, "1.2.3.10", "1.2.3.14");
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_test_address_range ("1.2.3.9", 29, "1.2.3.10", "1.2.3.14");
|
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_test_address_range ("255.255.255.248", 29, "255.255.255.250", "255.255.255.254");
|
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_test_address_range ("255.255.255.249", 29, "255.255.255.250", "255.255.255.254");
|
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_test_address_range ("255.255.255.250", 29, "255.255.255.251", "255.255.255.254");
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_test_address_range ("255.255.255.251", 29, "255.255.255.252", "255.255.255.254");
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_test_address_range ("255.255.255.252", 29, "255.255.255.249", "255.255.255.251");
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_test_address_range ("255.255.255.253", 29, "255.255.255.249", "255.255.255.252");
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_test_address_range ("255.255.255.254", 29, "255.255.255.249", "255.255.255.253");
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_test_address_range ("255.255.255.255", 29, "255.255.255.249", "255.255.255.253");
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|
||||
addr = *nmtst_platform_ip4_address ("1.2.3.1", NULL, 29);
|
||||
g_assert (nm_dnsmasq_utils_get_range (&addr, first, last, &error_desc));
|
||||
g_assert (error_desc == NULL);
|
||||
g_assert_cmpstr (first, ==, "1.2.3.2");
|
||||
g_assert_cmpstr (last, ==, "1.2.3.6");
|
||||
_test_address_range ("1.2.3.1", 29, "1.2.3.2", "1.2.3.6");
|
||||
_test_address_range ("1.2.3.1", 28, "1.2.3.3", "1.2.3.14");
|
||||
_test_address_range ("1.2.3.1", 26, "1.2.3.8", "1.2.3.62");
|
||||
|
||||
addr = *nmtst_platform_ip4_address ("1.2.3.1", NULL, 28);
|
||||
g_assert (nm_dnsmasq_utils_get_range (&addr, first, last, &error_desc));
|
||||
g_assert (error_desc == NULL);
|
||||
g_assert_cmpstr (first, ==, "1.2.3.3");
|
||||
g_assert_cmpstr (last, ==, "1.2.3.14");
|
||||
_test_address_range ("192.167.255.255", 24, "192.167.255.1", "192.167.255.245");
|
||||
_test_address_range ("192.168.0.0", 24, "192.168.0.10", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.1", 24, "192.168.0.10", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.2", 24, "192.168.0.11", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.99", 24, "192.168.0.108", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.126", 24, "192.168.0.135", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.127", 24, "192.168.0.136", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.128", 24, "192.168.0.1", "192.168.0.119");
|
||||
_test_address_range ("192.168.0.129", 24, "192.168.0.1", "192.168.0.120");
|
||||
_test_address_range ("192.168.0.130", 24, "192.168.0.1", "192.168.0.121");
|
||||
_test_address_range ("192.168.0.254", 24, "192.168.0.1", "192.168.0.245");
|
||||
_test_address_range ("192.168.0.255", 24, "192.168.0.1", "192.168.0.245");
|
||||
_test_address_range ("192.168.1.0", 24, "192.168.1.10", "192.168.1.254");
|
||||
_test_address_range ("192.168.1.1", 24, "192.168.1.10", "192.168.1.254");
|
||||
_test_address_range ("192.168.1.2", 24, "192.168.1.11", "192.168.1.254");
|
||||
_test_address_range ("192.168.1.10", 24, "192.168.1.19", "192.168.1.254");
|
||||
_test_address_range ("192.168.15.253", 24, "192.168.15.1", "192.168.15.244");
|
||||
_test_address_range ("192.168.15.254", 24, "192.168.15.1", "192.168.15.245");
|
||||
_test_address_range ("192.168.15.255", 24, "192.168.15.1", "192.168.15.245");
|
||||
_test_address_range ("192.168.16.0", 24, "192.168.16.10", "192.168.16.254");
|
||||
_test_address_range ("192.168.16.1", 24, "192.168.16.10", "192.168.16.254");
|
||||
|
||||
addr = *nmtst_platform_ip4_address ("1.2.3.1", NULL, 26);
|
||||
g_assert (nm_dnsmasq_utils_get_range (&addr, first, last, &error_desc));
|
||||
g_assert (error_desc == NULL);
|
||||
g_assert_cmpstr (first, ==, "1.2.3.8");
|
||||
g_assert_cmpstr (last, ==, "1.2.3.62");
|
||||
|
||||
addr = *nmtst_platform_ip4_address ("1.2.3.1", NULL, 31);
|
||||
g_assert (nm_dnsmasq_utils_get_range (&addr, first, last, &error_desc) == FALSE);
|
||||
g_assert (error_desc);
|
||||
g_free (error_desc);
|
||||
_test_address_range ("192.167.255.255", 20, "192.167.255.1", "192.167.255.245");
|
||||
_test_address_range ("192.168.0.0", 20, "192.168.0.10", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.1", 20, "192.168.0.10", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.2", 20, "192.168.0.11", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.126", 20, "192.168.0.135", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.127", 20, "192.168.0.136", "192.168.0.254");
|
||||
_test_address_range ("192.168.0.128", 20, "192.168.0.1", "192.168.0.119");
|
||||
_test_address_range ("192.168.0.129", 20, "192.168.0.1", "192.168.0.120");
|
||||
_test_address_range ("192.168.0.130", 20, "192.168.0.1", "192.168.0.121");
|
||||
_test_address_range ("192.168.0.254", 20, "192.168.0.1", "192.168.0.245");
|
||||
_test_address_range ("192.168.0.255", 20, "192.168.0.1", "192.168.0.245");
|
||||
_test_address_range ("192.168.1.0", 20, "192.168.1.10", "192.168.1.254");
|
||||
_test_address_range ("192.168.1.1", 20, "192.168.1.10", "192.168.1.254");
|
||||
_test_address_range ("192.168.1.2", 20, "192.168.1.11", "192.168.1.254");
|
||||
_test_address_range ("192.168.1.10", 20, "192.168.1.19", "192.168.1.254");
|
||||
_test_address_range ("192.168.15.253", 20, "192.168.15.1", "192.168.15.244");
|
||||
_test_address_range ("192.168.15.254", 20, "192.168.15.1", "192.168.15.245");
|
||||
_test_address_range ("192.168.15.255", 20, "192.168.15.1", "192.168.15.245");
|
||||
_test_address_range ("192.168.16.0", 20, "192.168.16.10", "192.168.16.254");
|
||||
_test_address_range ("192.168.16.1", 20, "192.168.16.10", "192.168.16.254");
|
||||
}
|
||||
|
||||
/*****************************************************************************/
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue