Add DHCP driver and element handling

1 files changed, 143 insertions, 0 deletions

diff --git a/src/dhcp.c b/src/dhcp.c
index 3fd802b5..93401d7b 100644
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -23,18 +23,161 @@
 #include <config.h>
 #endif
 
+#include <glib.h>
+
 #include "connman.h"
 
+struct connman_dhcp {
+	gint refcount;
+	int index;
+	enum connman_dhcp_state state;
+
+	struct connman_element *element;
+
+	struct connman_dhcp_driver *driver;
+	void *driver_data;
+};
+
+/**
+ * connman_dhcp_ref:
+ * @dhcp: DHCP structure
+ *
+ * Increase reference counter of DHCP
+ */
+struct connman_dhcp *connman_dhcp_ref(struct connman_dhcp *dhcp)
+{
+	g_atomic_int_inc(&dhcp->refcount);
+
+	return dhcp;
+}
+
+/**
+ * connman_dhcp_unref:
+ * @dhcp: DHCP structure
+ *
+ * Decrease reference counter of DHCP
+ */
+void connman_dhcp_unref(struct connman_dhcp *dhcp)
+{
+	if (g_atomic_int_dec_and_test(&dhcp->refcount) == TRUE)
+		g_free(dhcp);
+}
+
+/**
+ * connman_dhcp_get_interface:
+ * @dhcp: DHCP structure
+ *
+ * Get network interface of DHCP
+ */
+char *connman_dhcp_get_interface(struct connman_dhcp *dhcp)
+{
+	return connman_inet_ifname(dhcp->index);
+}
+
+/**
+ * connman_dhcp_bound:
+ * @dhcp: DHCP structure
+ *
+ * Report successful bound of the interface
+ */
+void connman_dhcp_bound(struct connman_dhcp *dhcp)
+{
+	DBG("dhcp %p", dhcp);
+}
+
+static GSList *driver_list = NULL;
+
+static gint compare_priority(gconstpointer a, gconstpointer b)
+{
+	const struct connman_dhcp_driver *driver1 = a;
+	const struct connman_dhcp_driver *driver2 = b;
+
+	return driver2->priority - driver1->priority;
+}
+
+/**
+ * connman_dhcp_driver_register:
+ * @driver: DHCP driver definition
+ *
+ * Register a new DHCP driver
+ *
+ * Returns: %0 on success
+ */
+int connman_dhcp_driver_register(struct connman_dhcp_driver *driver)
+{
+	DBG("driver %p name %s", driver, driver->name);
+
+	driver_list = g_slist_insert_sorted(driver_list, driver,
+							compare_priority);
+
+	return 0;
+}
+
+/**
+ * connman_dhcp_driver_unregister:
+ * @driver: DHCP driver definition
+ *
+ * Remove a previously registered DHCP driver
+ */
+void connman_dhcp_driver_unregister(struct connman_dhcp_driver *driver)
+{
+	DBG("driver %p name %s", driver, driver->name);
+
+	driver_list = g_slist_remove(driver_list, driver);
+}
+
 static int dhcp_probe(struct connman_element *element)
 {
+	struct connman_dhcp *dhcp;
+	GSList *list;
+
 	DBG("element %p name %s", element, element->name);
 
+	dhcp = g_try_new0(struct connman_dhcp, 1);
+	if (dhcp == NULL)
+		return -ENOMEM;
+
+	dhcp->refcount = 1;
+	dhcp->index = element->index;
+	dhcp->state = CONNMAN_DHCP_STATE_IDLE;
+
+	dhcp->element = element;
+
+	connman_element_set_data(element, dhcp);
+
+	for (list = driver_list; list; list = list->next) {
+		struct connman_dhcp_driver *driver = list->data;
+
+		DBG("driver %p name %s", driver, driver->name);
+
+		if (driver->request(dhcp) == 0) {
+			dhcp->driver = driver;
+			break;
+		}
+	}
+
+	if (dhcp->driver == NULL) {
+		connman_dhcp_unref(dhcp);
+		return -ENOENT;
+	}
+
 	return 0;
 }
 
 static void dhcp_remove(struct connman_element *element)
 {
+	struct connman_dhcp *dhcp = connman_element_get_data(element);
+
 	DBG("element %p name %s", element, element->name);
+
+	connman_element_set_data(element, NULL);
+
+	if (dhcp->driver) {
+		dhcp->driver->release(dhcp);
+		dhcp->driver = NULL;
+	}
+
+	connman_dhcp_unref(dhcp);
 }
 
 static struct connman_driver dhcp_driver = {