diff options
Diffstat (limited to 'plugins/netlink.c')
-rw-r--r-- | plugins/netlink.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/plugins/netlink.c b/plugins/netlink.c new file mode 100644 index 00000000..887b51ea --- /dev/null +++ b/plugins/netlink.c @@ -0,0 +1,126 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2004-2008 Marcel Holtmann <marcel@holtmann.org> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 <errno.h> + +#include <netlink/netlink.h> +#include <netlink/genl/genl.h> +#include <netlink/genl/ctrl.h> +#include <netlink/genl/family.h> + +#include <bluetooth/bluetooth.h> + +#include <glib.h> + +#include "plugin.h" +#include "logging.h" + +static struct nl_handle *handle; +static struct nl_cache *cache; +static struct genl_family *family; + +static GIOChannel *channel; + +static gboolean channel_callback(GIOChannel *chan, + GIOCondition cond, void *user_data) +{ + int err; + + if (cond & (G_IO_ERR | G_IO_HUP | G_IO_NVAL)) + return FALSE; + + debug("Message available on netlink channel"); + + err = nl_recvmsgs_default(handle); + + return TRUE; +} + +static int create_channel(int fd) +{ + channel = g_io_channel_unix_new(fd); + if (channel == NULL) + return -ENOMEM; + + g_io_add_watch(channel, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, + channel_callback, NULL); + + return 0; +} + +static int netlink_init(void) +{ + info("Starting experimental netlink support"); + + handle = nl_handle_alloc(); + if (!handle) { + error("Failed to allocate netlink handle"); + return -ENOMEM; + } + + if (genl_connect(handle) < 0) { + error("Failed to connect to generic netlink"); + nl_handle_destroy(handle); + return -ENOLINK; + } + + cache = genl_ctrl_alloc_cache(handle); + if (!cache) { + error("Failed to allocate generic netlink cache"); + return -ENOMEM; + nl_handle_destroy(handle); + } + + family = genl_ctrl_search_by_name(cache, "bluetooth"); + if (!family) { + error("Failed to find Bluetooth netlink family"); + nl_cache_free(cache); + nl_handle_destroy(handle); + return -ENOENT; + } + + if (create_channel(nl_socket_get_fd(handle)) < 0) { + error("Failed to create netlink IO channel"); + genl_family_put(family); + nl_cache_free(cache); + nl_handle_destroy(handle); + return -ENOMEM; + } + + return 0; +} + +static void netlink_exit(void) +{ + g_io_channel_unref(channel); + + genl_family_put(family); + nl_cache_free(cache); + nl_handle_destroy(handle); +} + +BLUETOOTH_PLUGIN_DEFINE("netlink", netlink_init, netlink_exit) |