Add DHCP driver and element handling

4 files changed, 213 insertions, 1 deletions

diff --git a/Makefile.am b/Makefile.am
index ae21008c..d8fecd64 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -14,7 +14,7 @@ nodist_include_HEADERS = include/version.h
 noinst_HEADERS = include/driver.h include/element.h include/property.h \
 			include/rtnl.h include/wifi.h include/task.h \
 			include/dbus.h include/rfkill.h include/option.h \
-			include/profile.h include/provider.h
+			include/profile.h include/provider.h include/dhcp.h
 
 local_headers = $(foreach file,$(include_HEADERS) $(nodist_include_HEADERS) \
 			$(noinst_HEADERS), include/connman/$(notdir $(file)))
diff --git a/include/dhcp.h b/include/dhcp.h
new file mode 100644
index 00000000..7651293e
--- /dev/null
+++ b/include/dhcp.h
@@ -0,0 +1,67 @@
+/*
+ *
+ *  Connection Manager
+ *
+ *  Copyright (C) 2007-2009  Intel Corporation. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef __CONNMAN_DHCP_H
+#define __CONNMAN_DHCP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * SECTION:dhcp
+ * @title: DHCP premitives
+ * @short_description: Functions for handling DHCP
+ */
+
+enum connman_dhcp_state {
+	CONNMAN_DHCP_STATE_UNKNOWN  = 0,
+	CONNMAN_DHCP_STATE_IDLE     = 1,
+	CONNMAN_DHCP_STATE_BOUND    = 2,
+	CONNMAN_DHCP_STATE_RENEW    = 3,
+	CONNMAN_DHCP_STATE_FAIL     = 4,
+};
+
+struct connman_dhcp;
+
+struct connman_dhcp *connman_dhcp_ref(struct connman_dhcp *dhcp);
+void connman_dhcp_unref(struct connman_dhcp *dhcp);
+
+char *connman_dhcp_get_interface(struct connman_dhcp *dhcp);
+
+void connman_dhcp_bound(struct connman_dhcp *dhcp);
+
+struct connman_dhcp_driver {
+	const char *name;
+	int priority;
+	int (*request) (struct connman_dhcp *dhcp);
+	int (*release) (struct connman_dhcp *dhcp);
+	int (*renew) (struct connman_dhcp *dhcp);
+};
+
+int connman_dhcp_driver_register(struct connman_dhcp_driver *driver);
+void connman_dhcp_driver_unregister(struct connman_dhcp_driver *driver);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __CONNMAN_DHCP_H */
diff --git a/src/connman.h b/src/connman.h
index 62ae0b5a..9b833fa3 100644
--- a/src/connman.h
+++ b/src/connman.h
@@ -225,6 +225,8 @@ int __connman_element_set_ipv4(struct connman_element *element,
 
 gboolean __connman_element_device_isfiltered(const char *devname);
 
+#include <connman/dhcp.h>
+
 int __connman_dhcp_init(void);
 void __connman_dhcp_cleanup(void);
 
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 = {