Add experimental DHCP plugin

1 files changed, 273 insertions, 0 deletions

diff --git a/plugins/dhclient.c b/plugins/dhclient.c
new file mode 100644
index 00000000..dbf6e6d9
--- /dev/null
+++ b/plugins/dhclient.c
@@ -0,0 +1,273 @@
+/*
+ *
+ *  Connection Manager
+ *
+ *  Copyright (C) 2007  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
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <signal.h>
+#include <string.h>
+#include <arpa/inet.h>
+
+#include <glib.h>
+#include <gdbus.h>
+
+#include <connman/plugin.h>
+#include <connman/dhcp.h>
+
+#include "net.h"
+
+static const char *busname;
+
+struct dhclient_task {
+	GPid pid;
+	char *ifname;
+	struct connman_iface *iface;
+};
+
+static GSList *tasks = NULL;
+
+static struct dhclient_task *find_task(GPid pid)
+{
+	GSList *list;
+
+	for (list = tasks; list; list = list->next) {
+		struct dhclient_task *task = list->data;
+
+		if (task->pid == pid)
+			return task;
+	}
+
+	return NULL;
+}
+
+static int dhclient_request(struct connman_iface *iface)
+{
+	struct dhclient_task *task;
+	char *ifname, *argv[16], address[128], pidfile[PATH_MAX];
+	char leases[PATH_MAX], config[PATH_MAX], script[PATH_MAX];
+
+	ifname = __net_ifname(iface->sysfs);
+	if (ifname == NULL)
+		return -1;
+
+	task = g_try_new0(struct dhclient_task, 1);
+	if (task == NULL)
+		return -1;
+
+	task->ifname = ifname;
+	task->iface = iface;
+
+	printf("[DHCP] request for %s\n", ifname);
+
+	snprintf(address, sizeof(address) - 1, "BUSNAME=%s", busname);
+	snprintf(pidfile, sizeof(pidfile) - 1,
+				"%s/dhclient.%s.pid", STATEDIR, ifname);
+	snprintf(leases, sizeof(leases) - 1,
+				"%s/dhclient.%s.leases", STATEDIR, ifname);
+	snprintf(config, sizeof(config) - 1, "%s/dhclient.conf", SCRIPTDIR);
+	snprintf(script, sizeof(script) - 1, "%s/dhclient-script", SCRIPTDIR);
+
+	argv[0] = "/sbin/dhclient";
+	argv[1] = "-d";
+	argv[2] = "-q";
+	argv[3] = "-n";
+	argv[4] = "-e";
+	argv[5] = address;
+	argv[6] = "-pf";
+	argv[7] = pidfile;
+	argv[8] = "-lf";
+	argv[9] = leases;
+	argv[10] = "-cf";
+	argv[11] = config;
+	argv[12] = "-sf";
+	argv[13] = script;
+	argv[14] = ifname;
+	argv[15] = NULL;
+
+	if (g_spawn_async(NULL, argv, NULL, G_SPAWN_DO_NOT_REAP_CHILD,
+				NULL, NULL, &task->pid, NULL) == FALSE) {
+		printf("Failed to spawn dhclient\n");
+		return -1;
+	}
+
+	tasks = g_slist_append(tasks, task);
+
+	printf("[DHCP] executed with pid %d\n", task->pid);
+
+	return 0;
+}
+
+static int dhclient_release(struct connman_iface *iface)
+{
+	char *ifname;
+
+	ifname = __net_ifname(iface->sysfs);
+	if (ifname == NULL)
+		return -1;
+
+	printf("[DHCP] release for %s\n", ifname);
+
+	__net_free(ifname);
+
+	return 0;
+}
+
+static struct connman_dhcp_driver dhclient_driver = {
+	.name		= "dhclient",
+	.request	= dhclient_request,
+	.release	= dhclient_release,
+};
+
+static DBusMessage *notify_method(DBusConnection *conn,
+					DBusMessage *msg, void *data)
+{
+	DBusMessageIter iter, dict;
+	dbus_uint32_t pid;
+	struct dhclient_task *task;
+	struct connman_ipv4 ipv4;
+	const char *text, *key, *value;
+
+	memset(&ipv4, 0, sizeof(ipv4));
+
+	dbus_message_iter_init(msg, &iter);
+
+	dbus_message_iter_get_basic(&iter, &pid);
+	dbus_message_iter_next(&iter);
+
+	dbus_message_iter_get_basic(&iter, &text);
+	dbus_message_iter_next(&iter);
+
+	printf("[DHCP] change %d to %s\n", pid, text);
+
+	task = find_task(pid);
+	if (task == NULL)
+		return NULL;
+
+	dbus_message_iter_recurse(&iter, &dict);
+
+	while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
+		DBusMessageIter entry;
+
+		dbus_message_iter_recurse(&dict, &entry);
+		dbus_message_iter_get_basic(&entry, &key);
+		dbus_message_iter_next(&entry);
+		dbus_message_iter_get_basic(&entry, &value);
+
+		printf("[DHCP] %s = %s\n", key, value);
+
+		if (strcmp(key, "new_ip_address") == 0)
+			inet_aton(value, &ipv4.address);
+
+		if (strcmp(key, "new_subnet_mask") == 0)
+			inet_aton(value, &ipv4.netmask);
+
+		if (strcmp(key, "new_routers") == 0)
+			inet_aton(value, &ipv4.gateway);
+
+		if (strcmp(key, "new_network_number") == 0)
+			inet_aton(value, &ipv4.network);
+
+		if (strcmp(key, "new_broadcast_address") == 0)
+			inet_aton(value, &ipv4.broadcast);
+
+		if (strcmp(key, "new_domain_name_servers") == 0)
+			inet_aton(value, &ipv4.nameserver);
+
+		dbus_message_iter_next(&dict);
+	}
+
+	if (strcmp(text, "PREINIT") == 0)
+		connman_dhcp_update(task->iface,
+					CONNMAN_DHCP_STATE_INIT, &ipv4);
+	else if (strcmp(text, "BOUND") == 0 || strcmp(text, "REBOOT") == 0)
+		connman_dhcp_update(task->iface,
+					CONNMAN_DHCP_STATE_BOUND, &ipv4);
+	else if (strcmp(text, "RENEW") == 0 || strcmp(text, "REBIND") == 0)
+		connman_dhcp_update(task->iface,
+					CONNMAN_DHCP_STATE_RENEW, &ipv4);
+	else
+		connman_dhcp_update(task->iface,
+					CONNMAN_DHCP_STATE_FAILED, NULL);
+
+	return NULL;
+}
+
+static GDBusMethodTable dhclient_methods[] = {
+	{ "notify", "usa{ss}", "", notify_method, G_DBUS_METHOD_FLAG_NOREPLY },
+	{ },
+};
+
+static DBusConnection *connection;
+
+static int plugin_init(void)
+{
+	connection = g_dbus_setup_bus(DBUS_BUS_SYSTEM, NULL);
+
+	busname = dbus_bus_get_unique_name(connection);
+
+	g_dbus_register_object(connection, "/org/isc/dhclient", NULL, NULL);
+
+	g_dbus_register_interface(connection, "/org/isc/dhclient",
+					"org.isc.dhclient",
+					dhclient_methods, NULL, NULL);
+
+	connman_dhcp_register(&dhclient_driver);
+
+	return 0;
+}
+
+static void plugin_exit(void)
+{
+	GSList *list;
+
+	for (list = tasks; list; list = list->next) {
+		struct dhclient_task *task = list->data;
+		char pathname[PATH_MAX];
+
+		printf("[DHCP] killing process %d\n", task->pid);
+
+		kill(task->pid, SIGTERM);
+
+		snprintf(pathname, sizeof(pathname) - 1,
+				"%s/dhclient.%s.pid", STATEDIR, task->ifname);
+		unlink(pathname);
+
+		snprintf(pathname, sizeof(pathname) - 1,
+				"%s/dhclient.%s.leases", STATEDIR, task->ifname);
+		unlink(pathname);
+
+		__net_free(task->ifname);
+
+		g_free(task);
+	}
+
+	g_slist_free(tasks);
+
+	connman_dhcp_unregister(&dhclient_driver);
+
+	g_dbus_cleanup_connection(connection);
+}
+
+CONNMAN_PLUGIN_DEFINE("dhclient", "ISC DHCP client plugin", VERSION,
+						plugin_init, plugin_exit)