Implemented network device class

[mtetherd] / net.c

diff --git a/net.c b/net.c
index 422794e..c1946d9 100644 (file)
--- a/net.c
+++ b/net.c
@@ -18,34 +18,148 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include <string.h>
 #include <netinet/in.h>
 #include "net.h"
 
-#define MTETHERD_DEVICE_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), MTETHERD_DEVICE_TYPE_BAR, MTetherDDevicePrivate))
+#define MTETHERD_DEVICE_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), TYPE_MTETHERD_DEVICE, MTetherDDevicePrivate))
+
+G_DEFINE_TYPE(MTetherDDevice, mtetherd_device, G_TYPE_OBJECT);
+
+// Host order 192.168.255.0
+static const in_addr_t HOST_BASE_ADDRESS = 0xc0a8ff00;
+// Host order 255.255.255.252
+static const in_addr_t HOST_NETMASK = 0xfffffffc;
+// Host order 0.0.0.2
+static const in_addr_t HOST_ROUTER = 0x00000002;
+// Host order 0.0.0.1
+static const in_addr_t HOST_DHCP = 0x00000001;
 
 struct _MTetherDDevicePrivate {
-       char *interface;
-       char *udi;
-       struct in_addr addr;
-       struct in_addr netmask;
-       struct in_addr dhcp_start;
-       struct in_addr dhcp_end;
+       gchar *interface;
+       gchar *udi;
+       // Network order
+       in_addr_t addr;
+       in_addr_t netmask;
+       in_addr_t dhcp_start;
+       in_addr_t dhcp_end;
 };
 
-static void mtetherd_device_bar_finalize(MTetherDDevice *self) {
-       self->priv = MTETHERD_DEVICE_GET_PRIVATE(self);
+static void mtetherd_device_finalize(GObject *object) {
+       MTetherDDevice *self = MTETHERD_DEVICE(object);
+
+       if (self && self->priv) {
+               g_free(self->priv->interface);
+               g_free(self->priv->udi);
+       }
 }
 
 static void mtetherd_device_class_init(MTetherDDeviceClass *klass) {
        GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 
-       gobject_class->finalize = mtetherd_device_bar_finalize;
+       gobject_class->finalize = mtetherd_device_finalize;
        g_type_class_add_private(klass, sizeof(MTetherDDevicePrivate));
 }
 
-static void mtetherd_device_bar_init(MTetherDDevice *self) {
+static void mtetherd_device_init(MTetherDDevice *self) {
        self->priv = MTETHERD_DEVICE_GET_PRIVATE(self);
        
+       if (self->priv) {
+               self->priv->interface = NULL;
+               self->priv->udi = NULL;
+               self->priv->addr = 0;
+               self->priv->netmask = 0;
+               self->priv->dhcp_start = 0;
+               self->priv->dhcp_end = 0;
+       }
+}
+
+static void mtetherd_device_set_interface(MTetherDDevice *self, const gchar *interface) {
+       if (self) {
+               if (self->priv->interface) {
+                       g_free(self->priv->interface);
+               }
+               if (interface) {
+                       size_t len = strlen(interface);
+                       self->priv->interface = g_malloc(len + 1);
+                       size_t i, j;
+                       for (i = 0, j = 0; i < len; i++) {
+                               if (g_ascii_isalnum(interface[i])) {
+                                       self->priv->interface[j] = interface[i];
+                                       j++;
+                               }
+                       }
+                       self->priv->interface[j] = '\0';
+               }
+       }
+}
+
+static void mtetherd_device_set_udi(MTetherDDevice *self, const gchar *udi) {
+       if (self) {
+               if (self->priv->udi) {
+                       g_free(self->priv->udi);
+               }
+               if (udi) {
+                       size_t len = strlen(udi);
+                       self->priv->udi = g_malloc(len + 1);
+                       size_t i, j;
+                       for (i = 0, j = 0; i < len; i++) {
+                               if (g_ascii_isalnum(udi[i]) || g_ascii_ispunct(udi[i])) {
+                                       self->priv->udi[j] = udi[i];
+                                       j++;
+                               }
+                       }
+                       self->priv->udi[j] = '\0';
+               }
+       }
+}
+
+static void mtetherd_device_set_index(MTetherDDevice *self, guint index) {
+       if (self && self->priv) {
+               // Maximum is 63, we need four addresses per subnet
+               if (index < 64) {
+                       in_addr_t subnet = HOST_BASE_ADDRESS | (index << 2);
+                       in_addr_t addr = subnet | HOST_ROUTER;
+                       in_addr_t start = subnet | HOST_DHCP;
+                       self->priv->addr = htonl(addr);
+                       self->priv->netmask = htonl(HOST_NETMASK);
+                       self->priv->dhcp_start = htonl(start);
+                       self->priv->dhcp_end = htonl(addr);
+               } else {
+                       g_warning("Invalid subnet index: %u (0..63 expected)", index);
+               }
+       }
+}
+
+MTetherDDevice *mtetherd_device_new(const gchar *interface, const gchar *udi, guint index) {
+       MTetherDDevice *self = MTETHERD_DEVICE(g_object_new(TYPE_MTETHERD_DEVICE, NULL));
+
+       if (self && self->priv) {
+               mtetherd_device_set_interface(self, interface);
+               mtetherd_device_set_udi(self, udi);
+               mtetherd_device_set_index(self, index);
+       }
+       
+       return self;
+}
+
+static gint mtetherd_device_find_udi(gconstpointer a, gconstpointer b) {
+       const MTetherDDevice *self = MTETHERD_DEVICE(a);
+       const gchar *udi = (const gchar *) b;
        
+       if (self && udi) {
+               if (g_strcmp0(self->priv->udi, udi) == 0) {
+                       return 0;
+               }
+       }
+       return -1;
+}
+
+MTetherDDevice *mtetherd_device_find(GList *list, const gchar *udi) {
+       GList *entry = g_list_find_custom(list, udi, mtetherd_device_find_udi);
+       if (entry) {
+               return MTETHERD_DEVICE(entry->data);
+       }
+       return NULL;
 }