1396 lines
32 KiB
C
1396 lines
32 KiB
C
/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2013-2014 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/socket.h>
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#include <linux/if.h>
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#include <linux/if_ether.h>
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#include <ell/ell.h>
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#include "linux/nl80211.h"
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#include "src/iwd.h"
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#include "src/ie.h"
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#include "src/wiphy.h"
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#include "src/dbus.h"
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static struct l_genl *genl = NULL;
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static struct l_genl_family *nl80211 = NULL;
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static int scheduled_scan_interval = 60; /* in secs */
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struct bss {
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uint8_t addr[ETH_ALEN];
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uint32_t frequency;
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char *ssid;
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};
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struct network {
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struct netdev *netdev;
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struct bss *bss;
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};
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struct netdev {
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uint32_t index;
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char name[IFNAMSIZ];
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uint32_t type;
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uint8_t addr[ETH_ALEN];
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struct l_queue *bss_list;
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struct l_queue *old_bss_list;
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struct l_dbus_message *pending;
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struct l_hashmap *networks;
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};
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struct wiphy {
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uint32_t id;
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char name[20];
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uint32_t feature_flags;
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struct l_queue *netdev_list;
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bool support_scheduled_scan;
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};
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static struct l_queue *wiphy_list = NULL;
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static bool _msg_append_attr(struct l_genl_msg *msg,
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uint16_t type, const char *type_str,
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uint16_t len, const void *value)
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{
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bool ret;
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ret = l_genl_msg_append_attr(msg, type, len, value);
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if (!ret)
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l_warn("Cannot append attr %s", type_str);
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return ret;
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}
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#define msg_append_attr(msg, type, len, value) \
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_msg_append_attr(msg, type, #type, len, value)
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static void do_debug(const char *str, void *user_data)
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{
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const char *prefix = user_data;
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l_info("%s%s", prefix, str);
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}
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static const char *iwd_network_get_path(const struct network *network)
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{
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static char path[256];
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snprintf(path, sizeof(path), "%s/%02X%02X%02X%02X%02X%02X",
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iwd_device_get_path(network->netdev),
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network->bss->addr[0], network->bss->addr[1],
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network->bss->addr[2], network->bss->addr[3],
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network->bss->addr[4], network->bss->addr[5]);
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return path;
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}
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static bool __iwd_network_append_properties(const struct network *network,
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struct l_dbus_message_builder *builder)
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{
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l_dbus_message_builder_enter_array(builder, "{sv}");
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dbus_dict_append_string(builder, "SSID", network->bss->ssid);
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l_dbus_message_builder_leave_array(builder);
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return true;
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}
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static struct l_dbus_message *network_get_properties(struct l_dbus *dbus,
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struct l_dbus_message *message,
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void *user_data)
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{
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struct network *network = user_data;
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struct l_dbus_message *reply;
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struct l_dbus_message_builder *builder;
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reply = l_dbus_message_new_method_return(message);
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builder = l_dbus_message_builder_new(reply);
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__iwd_network_append_properties(network, builder);
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l_dbus_message_builder_finalize(builder);
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l_dbus_message_builder_destroy(builder);
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return reply;
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}
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static struct l_dbus_message *network_connect(struct l_dbus *dbus,
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struct l_dbus_message *message,
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void *user_data)
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{
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struct network *network = user_data;
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struct netdev *netdev = network->netdev;
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struct bss *bss = network->bss;
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uint32_t auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
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struct l_genl_msg *msg;
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struct l_dbus_message *reply;
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msg = l_genl_msg_new_sized(NL80211_CMD_AUTHENTICATE, 512);
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msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
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msg_append_attr(msg, NL80211_ATTR_WIPHY_FREQ, 4, &bss->frequency);
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msg_append_attr(msg, NL80211_ATTR_MAC, ETH_ALEN, bss->addr);
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msg_append_attr(msg, NL80211_ATTR_SSID, strlen(bss->ssid), bss->ssid);
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msg_append_attr(msg, NL80211_ATTR_AUTH_TYPE, 4, &auth_type);
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l_genl_family_send(nl80211, msg, NULL, NULL, NULL);
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l_genl_msg_unref(msg);
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reply = l_dbus_message_new_method_return(message);
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l_dbus_message_set_arguments(reply, "");
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return reply;
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}
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static void setup_network_interface(struct l_dbus_interface *interface)
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{
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l_dbus_interface_method(interface, "GetProperties", 0,
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network_get_properties,
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"a{sv}", "", "properties");
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l_dbus_interface_method(interface, "Connect", 0,
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network_connect,
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"", "");
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l_dbus_interface_signal(interface, "PropertyChanged", 0,
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"sv", "name", "value");
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l_dbus_interface_ro_property(interface, "Name", "s");
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}
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static void network_emit_added(struct network *network)
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{
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struct l_dbus *dbus = dbus_get_bus();
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struct l_dbus_message *signal;
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struct l_dbus_message_builder *builder;
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signal = l_dbus_message_new_signal(dbus,
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iwd_device_get_path(network->netdev),
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IWD_DEVICE_INTERFACE,
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"NetworkAdded");
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if (!signal)
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return;
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builder = l_dbus_message_builder_new(signal);
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if (!builder) {
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l_dbus_message_unref(signal);
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return;
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}
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l_dbus_message_builder_append_basic(builder, 'o',
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iwd_network_get_path(network));
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__iwd_network_append_properties(network, builder);
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l_dbus_message_builder_finalize(builder);
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l_dbus_message_builder_destroy(builder);
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l_dbus_send(dbus, signal);
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}
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static void network_emit_removed(struct network *network)
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{
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struct l_dbus *dbus = dbus_get_bus();
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struct l_dbus_message *signal;
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signal = l_dbus_message_new_signal(dbus,
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iwd_device_get_path(network->netdev),
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IWD_DEVICE_INTERFACE,
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"NetworkRemoved");
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if (!signal)
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return;
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l_dbus_message_set_arguments(signal, "o",
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iwd_network_get_path(network));
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l_dbus_send(dbus, signal);
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}
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static void network_free(void *data)
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{
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struct network *network = data;
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struct l_dbus *dbus;
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dbus = dbus_get_bus();
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l_dbus_unregister_interface(dbus, iwd_network_get_path(network),
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IWD_NETWORK_INTERFACE);
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network_emit_removed(network);
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l_free(network);
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}
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const char *iwd_device_get_path(struct netdev *netdev)
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{
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static char path[256];
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snprintf(path, sizeof(path), "/%u", netdev->index);
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return path;
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}
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bool __iwd_device_append_properties(struct netdev *netdev,
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struct l_dbus_message_builder *builder)
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{
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l_dbus_message_builder_enter_array(builder, "{sv}");
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dbus_dict_append_string(builder, "Name", netdev->name);
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l_dbus_message_builder_leave_array(builder);
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return true;
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}
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void __iwd_device_foreach(iwd_device_foreach_func func, void *user_data)
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{
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const struct l_queue_entry *wiphy_entry;
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for (wiphy_entry = l_queue_get_entries(wiphy_list); wiphy_entry;
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wiphy_entry = wiphy_entry->next) {
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struct wiphy *wiphy = wiphy_entry->data;
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const struct l_queue_entry *netdev_entry;
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netdev_entry = l_queue_get_entries(wiphy->netdev_list);
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while (netdev_entry) {
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struct netdev *netdev = netdev_entry->data;
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func(netdev, user_data);
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netdev_entry = netdev_entry->next;
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}
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}
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}
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static void device_emit_added(struct netdev *netdev)
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{
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struct l_dbus *dbus = dbus_get_bus();
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struct l_dbus_message *signal;
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struct l_dbus_message_builder *builder;
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signal = l_dbus_message_new_signal(dbus, IWD_MANAGER_PATH,
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IWD_MANAGER_INTERFACE,
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"DeviceAdded");
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if (!signal)
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return;
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builder = l_dbus_message_builder_new(signal);
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if (!builder) {
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l_dbus_message_unref(signal);
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return;
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}
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l_dbus_message_builder_append_basic(builder, 'o',
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iwd_device_get_path(netdev));
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__iwd_device_append_properties(netdev, builder);
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l_dbus_message_builder_finalize(builder);
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l_dbus_message_builder_destroy(builder);
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l_dbus_send(dbus, signal);
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}
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static void device_emit_removed(struct netdev *netdev)
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{
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struct l_dbus *dbus = dbus_get_bus();
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struct l_dbus_message *signal;
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signal = l_dbus_message_new_signal(dbus, IWD_MANAGER_PATH,
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IWD_MANAGER_INTERFACE,
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"DeviceRemoved");
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if (!signal)
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return;
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l_dbus_message_set_arguments(signal, "o", iwd_device_get_path(netdev));
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l_dbus_send(dbus, signal);
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}
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static struct l_dbus_message *device_set_property(struct l_dbus *dbus,
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struct l_dbus_message *message,
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void *user_data)
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{
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const char *property;
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struct l_dbus_message_iter variant;
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if (!l_dbus_message_get_arguments(message, "sv", &property, &variant))
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return l_dbus_message_new_error(message,
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"org.test.InvalidArguments",
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"Invalid arguments");
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return l_dbus_message_new_error(message, "org.test.InvalidArguments",
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"Unknown Property %s", property);
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}
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static struct l_dbus_message *device_get_properties(struct l_dbus *dbus,
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struct l_dbus_message *message,
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void *user_data)
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{
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struct netdev *netdev = user_data;
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struct l_dbus_message *reply;
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struct l_dbus_message_builder *builder;
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reply = l_dbus_message_new_method_return(message);
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builder = l_dbus_message_builder_new(reply);
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__iwd_device_append_properties(netdev, builder);
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l_dbus_message_builder_finalize(builder);
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l_dbus_message_builder_destroy(builder);
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return reply;
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}
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static void device_scan_callback(struct l_genl_msg *msg, void *user_data)
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{
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struct netdev *netdev = user_data;
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struct l_genl_attr attr;
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uint16_t type, len;
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const void *data;
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struct l_dbus_message *reply;
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if (!l_genl_attr_init(&attr, msg)) {
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dbus_pending_reply(&netdev->pending,
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dbus_error_failed(netdev->pending));
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return;
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}
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while (l_genl_attr_next(&attr, &type, &len, &data)) {
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}
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l_debug("Scan triggered for netdev %s", netdev->name);
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reply = l_dbus_message_new_method_return(netdev->pending);
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l_dbus_message_set_arguments(reply, "");
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dbus_pending_reply(&netdev->pending, reply);
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}
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static struct l_dbus_message *device_scan(struct l_dbus *dbus,
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struct l_dbus_message *message,
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void *user_data)
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{
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struct netdev *netdev = user_data;
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struct l_genl_msg *msg;
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if (netdev->pending)
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return dbus_error_busy(message);
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netdev->pending = l_dbus_message_ref(message);
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msg = l_genl_msg_new_sized(NL80211_CMD_TRIGGER_SCAN, 16);
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msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
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l_genl_family_send(nl80211, msg, device_scan_callback, netdev, NULL);
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l_genl_msg_unref(msg);
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return NULL;
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}
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static void append_network_properties(const void *key, void *value,
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void *user_data)
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{
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struct network *network = value;
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struct l_dbus_message_builder *builder = user_data;
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l_dbus_message_builder_enter_dict(builder, "oa{sv}");
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l_dbus_message_builder_append_basic(builder, 'o',
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iwd_network_get_path(network));
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__iwd_network_append_properties(network, builder);
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l_dbus_message_builder_leave_dict(builder);
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}
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static struct l_dbus_message *device_get_networks(struct l_dbus *dbus,
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struct l_dbus_message *message,
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void *user_data)
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{
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struct netdev *netdev = user_data;
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struct l_dbus_message *reply;
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struct l_dbus_message_builder *builder;
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reply = l_dbus_message_new_method_return(message);
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builder = l_dbus_message_builder_new(reply);
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l_dbus_message_builder_enter_array(builder, "{oa{sv}}");
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l_hashmap_foreach(netdev->networks, append_network_properties, builder);
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l_dbus_message_builder_leave_array(builder);
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l_dbus_message_builder_finalize(builder);
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l_dbus_message_builder_destroy(builder);
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return reply;
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}
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static void setup_device_interface(struct l_dbus_interface *interface)
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{
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l_dbus_interface_method(interface, "GetProperties", 0,
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device_get_properties,
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"a{sv}", "", "properties");
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l_dbus_interface_method(interface, "SetProperty", 0,
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device_set_property,
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"", "sv", "name", "value");
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l_dbus_interface_method(interface, "Scan", 0,
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device_scan, "", "");
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l_dbus_interface_method(interface, "GetNetworks", 0,
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device_get_networks,
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"a{oa{sv}}", "", "networks");
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l_dbus_interface_signal(interface, "PropertyChanged", 0,
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"sv", "name", "value");
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l_dbus_interface_signal(interface, "NetworkAdded", 0,
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"oa{sv}", "path", "properties");
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l_dbus_interface_signal(interface, "NetworkRemoved", 0,
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"o", "path");
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l_dbus_interface_ro_property(interface, "Name", "s");
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}
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static const char *bss_address_to_string(const struct bss *bss)
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{
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static char buf[32];
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snprintf(buf, sizeof(buf), "%02X:%02X:%02X:%02X:%02X:%02X",
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bss->addr[0], bss->addr[1], bss->addr[2],
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bss->addr[3], bss->addr[4], bss->addr[5]);
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return buf;
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}
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static bool bss_match(const void *a, const void *b)
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{
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const struct bss *bss_a = a;
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const struct bss *bss_b = b;
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return !memcmp(bss_a->addr, bss_b->addr, sizeof(bss_a->addr));
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}
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static void bss_free(void *data)
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{
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struct bss *bss = data;
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l_debug("Freeing BSS %02X:%02X:%02X:%02X:%02X:%02X [%s]",
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bss->addr[0], bss->addr[1], bss->addr[2],
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bss->addr[3], bss->addr[4], bss->addr[5], bss->ssid);
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l_free(bss->ssid);
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l_free(bss);
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}
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static void netdev_free(void *data)
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{
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struct netdev *netdev = data;
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struct l_dbus *dbus;
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dbus = dbus_get_bus();
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l_dbus_unregister_interface(dbus, iwd_device_get_path(netdev),
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IWD_DEVICE_INTERFACE);
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device_emit_removed(netdev);
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l_debug("Freeing interface %s", netdev->name);
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l_hashmap_destroy(netdev->networks, network_free);
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l_queue_destroy(netdev->bss_list, bss_free);
|
|
l_queue_destroy(netdev->old_bss_list, bss_free);
|
|
|
|
l_free(netdev);
|
|
}
|
|
|
|
static bool netdev_match(const void *a, const void *b)
|
|
{
|
|
const struct netdev *netdev = a;
|
|
uint32_t index = L_PTR_TO_UINT(b);
|
|
|
|
return (netdev->index == index);
|
|
}
|
|
|
|
static void wiphy_free(void *data)
|
|
{
|
|
struct wiphy *wiphy = data;
|
|
|
|
l_debug("Freeing wiphy %s", wiphy->name);
|
|
|
|
l_queue_destroy(wiphy->netdev_list, netdev_free);
|
|
l_free(wiphy);
|
|
}
|
|
|
|
static bool wiphy_match(const void *a, const void *b)
|
|
{
|
|
const struct wiphy *wiphy = a;
|
|
uint32_t id = L_PTR_TO_UINT(b);
|
|
|
|
return (wiphy->id == id);
|
|
}
|
|
|
|
static void mlme_associate(struct netdev *netdev, struct bss *bss)
|
|
{
|
|
struct l_genl_msg *msg;
|
|
|
|
if (!bss) {
|
|
bss = l_queue_peek_head(netdev->bss_list);
|
|
if (!bss)
|
|
return;
|
|
}
|
|
|
|
msg = l_genl_msg_new_sized(NL80211_CMD_ASSOCIATE, 512);
|
|
msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
|
|
msg_append_attr(msg, NL80211_ATTR_WIPHY_FREQ, 4, &bss->frequency);
|
|
msg_append_attr(msg, NL80211_ATTR_MAC, ETH_ALEN, bss->addr);
|
|
msg_append_attr(msg, NL80211_ATTR_SSID, strlen(bss->ssid), bss->ssid);
|
|
l_genl_family_send(nl80211, msg, NULL, NULL, NULL);
|
|
l_genl_msg_unref(msg);
|
|
}
|
|
|
|
static bool parse_ie(struct bss *bss, const void *data, uint16_t len)
|
|
{
|
|
struct ie_tlv_iter iter;
|
|
|
|
ie_tlv_iter_init(&iter, data, len);
|
|
|
|
while (ie_tlv_iter_next(&iter)) {
|
|
uint8_t tag = ie_tlv_iter_get_tag(&iter);
|
|
|
|
switch (tag) {
|
|
case 0:
|
|
bss->ssid = l_strndup((const char *) iter.data,
|
|
iter.len);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void parse_bss(struct netdev *netdev, struct l_genl_attr *attr)
|
|
{
|
|
uint16_t type, len;
|
|
const void *data;
|
|
struct bss *bss;
|
|
struct bss *old_bss;
|
|
|
|
bss = l_new(struct bss, 1);
|
|
|
|
while (l_genl_attr_next(attr, &type, &len, &data)) {
|
|
switch (type) {
|
|
case NL80211_BSS_BSSID:
|
|
if (len != sizeof(bss->addr)) {
|
|
l_warn("Invalid BSSID attribute");
|
|
goto fail;
|
|
}
|
|
|
|
memcpy(bss->addr, data, len);
|
|
break;
|
|
case NL80211_BSS_FREQUENCY:
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid frequency attribute");
|
|
goto fail;
|
|
}
|
|
|
|
bss->frequency = *((uint32_t *) data);
|
|
break;
|
|
case NL80211_BSS_INFORMATION_ELEMENTS:
|
|
if (!parse_ie(bss, data, len)) {
|
|
l_warn("Could not parse BSS IEs");
|
|
goto fail;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
old_bss = l_queue_remove_if(netdev->old_bss_list, bss_match, bss);
|
|
|
|
if (!old_bss) {
|
|
struct network *network;
|
|
|
|
l_debug("Found new BSS '%s' with SSID: %s, freq: %u",
|
|
bss_address_to_string(bss),
|
|
bss->ssid, bss->frequency);
|
|
|
|
network = l_new(struct network, 1);
|
|
network->bss = bss;
|
|
network->netdev = netdev;
|
|
|
|
l_hashmap_insert(netdev->networks, bss_address_to_string(bss),
|
|
network);
|
|
|
|
if (!l_dbus_register_interface(dbus_get_bus(),
|
|
iwd_network_get_path(network),
|
|
IWD_NETWORK_INTERFACE,
|
|
setup_network_interface,
|
|
network, NULL))
|
|
l_info("Unable to register %s interface",
|
|
IWD_NETWORK_INTERFACE);
|
|
else
|
|
network_emit_added(network);
|
|
} else {
|
|
struct network *network;
|
|
|
|
l_debug("Found existing BSS '%s'",
|
|
bss_address_to_string(bss));
|
|
|
|
network = l_hashmap_lookup(netdev->networks,
|
|
bss_address_to_string(bss));
|
|
if (network)
|
|
network->bss = bss;
|
|
|
|
bss_free(old_bss);
|
|
}
|
|
|
|
l_queue_push_head(netdev->bss_list, bss);
|
|
return;
|
|
|
|
fail:
|
|
bss_free(bss);
|
|
}
|
|
|
|
static void get_scan_callback(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct netdev *netdev = user_data;
|
|
struct l_genl_attr attr, nested;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
|
|
l_debug("get_scan_callback");
|
|
|
|
if (!l_genl_attr_init(&attr, msg))
|
|
return;
|
|
|
|
if (!netdev->old_bss_list) {
|
|
netdev->old_bss_list = netdev->bss_list;
|
|
netdev->bss_list = l_queue_new();
|
|
}
|
|
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
switch (type) {
|
|
case NL80211_ATTR_IFINDEX:
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid interface index attribute");
|
|
return;
|
|
}
|
|
|
|
if (netdev->index != *((uint32_t *) data)) {
|
|
l_warn("ifindex mismatch");
|
|
return;
|
|
}
|
|
|
|
break;
|
|
case NL80211_ATTR_BSS:
|
|
if (!netdev) {
|
|
l_warn("No interface structure found");
|
|
return;
|
|
}
|
|
|
|
if (!l_genl_attr_recurse(&attr, &nested))
|
|
return;
|
|
|
|
parse_bss(netdev, &nested);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void get_scan_done(void *user)
|
|
{
|
|
struct netdev *netdev = user;
|
|
const struct l_queue_entry *bss_entry;
|
|
|
|
l_debug("get_scan_done for netdev: %p", netdev);
|
|
|
|
for (bss_entry = l_queue_get_entries(netdev->old_bss_list); bss_entry;
|
|
bss_entry = bss_entry->next) {
|
|
struct bss *bss = bss_entry->data;
|
|
struct network *network;
|
|
|
|
l_debug("Lost BSS '%s' with SSID: %s",
|
|
bss_address_to_string(bss), bss->ssid);
|
|
network = l_hashmap_remove(netdev->networks,
|
|
bss_address_to_string(bss));
|
|
network_free(network);
|
|
}
|
|
|
|
l_queue_destroy(netdev->old_bss_list, bss_free);
|
|
netdev->old_bss_list = NULL;
|
|
}
|
|
|
|
static void get_scan(struct netdev *netdev)
|
|
{
|
|
struct l_genl_msg *msg;
|
|
|
|
msg = l_genl_msg_new_sized(NL80211_CMD_GET_SCAN, 8);
|
|
msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
|
|
l_genl_family_dump(nl80211, msg, get_scan_callback, netdev,
|
|
get_scan_done);
|
|
l_genl_msg_unref(msg);
|
|
}
|
|
|
|
static void sched_scan_callback(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct l_genl_attr attr;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
|
|
if (!l_genl_attr_init(&attr, msg)) {
|
|
int err = l_genl_msg_get_error(msg);
|
|
if (err < 0 && err != -EINPROGRESS) {
|
|
l_warn("Failed to setup scheduled scan [%d/%s]",
|
|
-err, strerror(-err));
|
|
goto done;
|
|
}
|
|
|
|
l_info("Scheduled scan started");
|
|
} else {
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
}
|
|
}
|
|
|
|
done:
|
|
return;
|
|
}
|
|
|
|
static void setup_scheduled_scan(struct wiphy *wiphy, struct netdev *netdev,
|
|
uint32_t scan_interval)
|
|
{
|
|
struct l_genl_msg *msg;
|
|
|
|
if (!wiphy->support_scheduled_scan) {
|
|
l_debug("Scheduled scan not supported for %s "
|
|
"iface %s ifindex %u", wiphy->name, netdev->name,
|
|
netdev->index);
|
|
return;
|
|
}
|
|
|
|
scan_interval *= 1000; /* in kernel the interval is in msecs */
|
|
|
|
msg = l_genl_msg_new_sized(NL80211_CMD_START_SCHED_SCAN, 32);
|
|
msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
|
|
msg_append_attr(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
|
|
4, &scan_interval);
|
|
msg_append_attr(msg, NL80211_ATTR_SOCKET_OWNER, 0, NULL);
|
|
|
|
if (!l_genl_family_send(nl80211, msg, sched_scan_callback, NULL, NULL))
|
|
l_error("Starting scheduled scan failed");
|
|
|
|
l_genl_msg_unref(msg);
|
|
}
|
|
|
|
static void interface_dump_callback(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct wiphy *wiphy = NULL;
|
|
struct netdev *netdev;
|
|
struct l_genl_attr attr;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
char ifname[IFNAMSIZ];
|
|
uint8_t ifaddr[ETH_ALEN];
|
|
uint32_t ifindex, iftype;
|
|
|
|
if (!l_genl_attr_init(&attr, msg))
|
|
return;
|
|
|
|
memset(ifname, 0, sizeof(ifname));
|
|
memset(ifaddr, 0, sizeof(ifaddr));
|
|
iftype = NL80211_IFTYPE_UNSPECIFIED;
|
|
ifindex = 0;
|
|
|
|
/*
|
|
* The interface index and interface name attributes are normally
|
|
* listed before the wiphy attribute. This handling assumes that
|
|
* all attributes are included in the same message.
|
|
*
|
|
* If any required attribute is missing, the whole message will
|
|
* be ignored.
|
|
*/
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
switch (type) {
|
|
case NL80211_ATTR_IFINDEX:
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid interface index attribute");
|
|
return;
|
|
}
|
|
|
|
ifindex = *((uint32_t *) data);
|
|
break;
|
|
|
|
case NL80211_ATTR_IFNAME:
|
|
if (len > sizeof(ifname)) {
|
|
l_warn("Invalid interface name attribute");
|
|
return;
|
|
}
|
|
|
|
memcpy(ifname, data, len);
|
|
break;
|
|
|
|
case NL80211_ATTR_WIPHY:
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid wiphy attribute");
|
|
return;
|
|
}
|
|
|
|
wiphy = l_queue_find(wiphy_list, wiphy_match,
|
|
L_UINT_TO_PTR(*((uint32_t *) data)));
|
|
if (!wiphy) {
|
|
l_warn("No wiphy structure found");
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case NL80211_ATTR_IFTYPE:
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid interface type attribute");
|
|
return;
|
|
}
|
|
|
|
iftype = *((uint32_t *) data);
|
|
break;
|
|
|
|
case NL80211_ATTR_MAC:
|
|
if (len != sizeof(ifaddr)) {
|
|
l_warn("Invalid interface address attribute");
|
|
return;
|
|
}
|
|
|
|
memcpy(ifaddr, data, len);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!ifindex) {
|
|
l_warn("Missing interface index attribute");
|
|
return;
|
|
}
|
|
|
|
netdev = l_queue_find(wiphy->netdev_list, netdev_match,
|
|
L_UINT_TO_PTR(ifindex));
|
|
if (!netdev) {
|
|
struct l_dbus *dbus = dbus_get_bus();
|
|
|
|
netdev = l_new(struct netdev, 1);
|
|
netdev->bss_list = l_queue_new();
|
|
netdev->networks = l_hashmap_string_new();
|
|
memcpy(netdev->name, ifname, sizeof(netdev->name));
|
|
memcpy(netdev->addr, ifaddr, sizeof(netdev->addr));
|
|
netdev->index = ifindex;
|
|
netdev->type = iftype;
|
|
|
|
l_queue_push_head(wiphy->netdev_list, netdev);
|
|
|
|
if (!l_dbus_register_interface(dbus,
|
|
iwd_device_get_path(netdev),
|
|
IWD_DEVICE_INTERFACE,
|
|
setup_device_interface,
|
|
netdev, NULL))
|
|
l_info("Unable to register %s interface",
|
|
IWD_DEVICE_INTERFACE);
|
|
else
|
|
device_emit_added(netdev);
|
|
}
|
|
|
|
setup_scheduled_scan(wiphy, netdev, scheduled_scan_interval);
|
|
|
|
l_debug("Found interface %s", netdev->name);
|
|
}
|
|
|
|
static void parse_supported_commands(struct wiphy *wiphy,
|
|
struct l_genl_attr *attr)
|
|
{
|
|
uint16_t type, len;
|
|
const void *data;
|
|
|
|
while (l_genl_attr_next(attr, &type, &len, &data)) {
|
|
uint32_t cmd = *(uint32_t *)data;
|
|
|
|
switch (cmd) {
|
|
case NL80211_CMD_START_SCHED_SCAN:
|
|
wiphy->support_scheduled_scan = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void wiphy_dump_callback(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct wiphy *wiphy = NULL;
|
|
struct l_genl_attr attr, nested;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
uint32_t id;
|
|
|
|
if (!l_genl_attr_init(&attr, msg))
|
|
return;
|
|
|
|
/*
|
|
* The wiphy attribute is always the first attribute in the
|
|
* list. If not then error out with a warning and ignore the
|
|
* whole message.
|
|
*
|
|
* In most cases multiple of these message will be send
|
|
* since the information included can not fit into a single
|
|
* message.
|
|
*/
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
switch (type) {
|
|
case NL80211_ATTR_WIPHY:
|
|
if (wiphy) {
|
|
l_warn("Duplicate wiphy attribute");
|
|
return;
|
|
}
|
|
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid wiphy attribute");
|
|
return;
|
|
}
|
|
|
|
id = *((uint32_t *) data);
|
|
|
|
wiphy = l_queue_find(wiphy_list, wiphy_match,
|
|
L_UINT_TO_PTR(id));
|
|
if (!wiphy) {
|
|
wiphy = l_new(struct wiphy, 1);
|
|
wiphy->id = id;
|
|
wiphy->netdev_list = l_queue_new();
|
|
l_queue_push_head(wiphy_list, wiphy);
|
|
}
|
|
break;
|
|
|
|
case NL80211_ATTR_WIPHY_NAME:
|
|
if (!wiphy) {
|
|
l_warn("No wiphy structure found");
|
|
return;
|
|
}
|
|
|
|
if (len > sizeof(wiphy->name)) {
|
|
l_warn("Invalid wiphy name attribute");
|
|
return;
|
|
}
|
|
|
|
memcpy(wiphy->name, data, len);
|
|
break;
|
|
|
|
case NL80211_ATTR_FEATURE_FLAGS:
|
|
if (!wiphy) {
|
|
l_warn("No wiphy structure found");
|
|
return;
|
|
}
|
|
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid feature flags attribute");
|
|
return;
|
|
}
|
|
|
|
wiphy->feature_flags = *((uint32_t *) data);
|
|
break;
|
|
case NL80211_ATTR_SUPPORTED_COMMANDS:
|
|
if (!wiphy) {
|
|
l_warn("No wiphy structure found");
|
|
return;
|
|
}
|
|
|
|
if (!l_genl_attr_recurse(&attr, &nested))
|
|
return;
|
|
|
|
parse_supported_commands(wiphy, &nested);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void wiphy_config_notify(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct l_genl_attr attr;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
uint8_t cmd;
|
|
|
|
cmd = l_genl_msg_get_command(msg);
|
|
|
|
l_debug("Notification of command %u", cmd);
|
|
|
|
if (!l_genl_attr_init(&attr, msg))
|
|
return;
|
|
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
}
|
|
}
|
|
|
|
static void wiphy_scan_notify(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct wiphy *wiphy = NULL;
|
|
struct netdev *netdev = NULL;
|
|
struct l_genl_attr attr;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
uint8_t cmd;
|
|
uint32_t uninitialized_var(attr_ifindex);
|
|
bool have_ifindex;
|
|
uint32_t uninitialized_var(attr_wiphy);
|
|
bool have_wiphy;
|
|
|
|
cmd = l_genl_msg_get_command(msg);
|
|
|
|
l_debug("Scan notification %u", cmd);
|
|
|
|
if (!l_genl_attr_init(&attr, msg))
|
|
return;
|
|
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
switch (type) {
|
|
case NL80211_ATTR_WIPHY:
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid wiphy attribute");
|
|
return;
|
|
}
|
|
|
|
have_wiphy = true;
|
|
attr_wiphy = *((uint32_t *) data);
|
|
break;
|
|
case NL80211_ATTR_IFINDEX:
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid interface index attribute");
|
|
return;
|
|
}
|
|
|
|
have_ifindex = true;
|
|
attr_ifindex = *((uint32_t *) data);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!have_wiphy) {
|
|
l_warn("Scan results do not contain wiphy attribute");
|
|
return;
|
|
}
|
|
|
|
if (!have_ifindex) {
|
|
l_warn("Scan results do not contain ifindex attribute");
|
|
return;
|
|
}
|
|
|
|
wiphy = l_queue_find(wiphy_list, wiphy_match,
|
|
L_UINT_TO_PTR(attr_wiphy));
|
|
if (!wiphy) {
|
|
l_warn("Scan notification for unknown wiphy");
|
|
return;
|
|
}
|
|
|
|
netdev = l_queue_find(wiphy->netdev_list, netdev_match,
|
|
L_UINT_TO_PTR(attr_ifindex));
|
|
if (!netdev) {
|
|
l_warn("Scan notification for unknown ifindex");
|
|
return;
|
|
}
|
|
|
|
if (cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
|
|
cmd == NL80211_CMD_SCHED_SCAN_RESULTS) {
|
|
get_scan(netdev);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void wiphy_mlme_notify(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct wiphy *wiphy = NULL;
|
|
struct netdev *netdev = NULL;
|
|
struct l_genl_attr attr;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
uint8_t cmd;
|
|
|
|
cmd = l_genl_msg_get_command(msg);
|
|
|
|
l_debug("MLME notification %u", cmd);
|
|
|
|
if (!l_genl_attr_init(&attr, msg))
|
|
return;
|
|
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
switch (type) {
|
|
case NL80211_ATTR_WIPHY:
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid wiphy attribute");
|
|
return;
|
|
}
|
|
|
|
wiphy = l_queue_find(wiphy_list, wiphy_match,
|
|
L_UINT_TO_PTR(*((uint32_t *) data)));
|
|
if (!wiphy) {
|
|
l_warn("No wiphy structure found");
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case NL80211_ATTR_IFINDEX:
|
|
if (!wiphy) {
|
|
l_warn("No wiphy structure found");
|
|
return;
|
|
}
|
|
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid interface index attribute");
|
|
return;
|
|
}
|
|
|
|
netdev = l_queue_find(wiphy->netdev_list, netdev_match,
|
|
L_UINT_TO_PTR(*((uint32_t *) data)));
|
|
if (!netdev) {
|
|
l_warn("No interface structure found");
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!wiphy) {
|
|
l_warn("Scan notification is missing wiphy attribute");
|
|
return;
|
|
}
|
|
|
|
if (!netdev) {
|
|
l_warn("Scan notification is missing interface attribute");
|
|
return;
|
|
}
|
|
|
|
if (cmd == NL80211_CMD_AUTHENTICATE) {
|
|
mlme_associate(netdev, NULL);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void wiphy_regulatory_notify(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct l_genl_attr attr;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
uint8_t cmd;
|
|
|
|
cmd = l_genl_msg_get_command(msg);
|
|
|
|
l_debug("Regulatory notification %u", cmd);
|
|
|
|
if (!l_genl_attr_init(&attr, msg))
|
|
return;
|
|
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
}
|
|
}
|
|
|
|
static void regulatory_info_callback(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct l_genl_attr attr;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
|
|
if (!l_genl_attr_init(&attr, msg))
|
|
return;
|
|
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
switch (type) {
|
|
case NL80211_ATTR_REG_ALPHA2:
|
|
if (len != 3) {
|
|
l_warn("Invalid regulatory alpha2 attribute");
|
|
return;
|
|
}
|
|
|
|
l_debug("Regulatory alpha2 is %s", (char *) data);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void protocol_features_callback(struct l_genl_msg *msg, void *user_data)
|
|
{
|
|
struct l_genl_attr attr;
|
|
uint16_t type, len;
|
|
const void *data;
|
|
uint32_t features = 0;
|
|
|
|
if (!l_genl_attr_init(&attr, msg))
|
|
return;
|
|
|
|
while (l_genl_attr_next(&attr, &type, &len, &data)) {
|
|
switch (type) {
|
|
case NL80211_ATTR_PROTOCOL_FEATURES:
|
|
if (len != sizeof(uint32_t)) {
|
|
l_warn("Invalid protocol features attribute");
|
|
return;
|
|
}
|
|
|
|
features = *((uint32_t *) data);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP)
|
|
l_debug("Found split wiphy dump support");
|
|
}
|
|
|
|
static void nl80211_appeared(void *user_data)
|
|
{
|
|
struct l_genl_msg *msg;
|
|
|
|
l_debug("Found nl80211 interface");
|
|
|
|
/*
|
|
* This is an extra sanity check so that no memory is leaked
|
|
* in case the generic netlink handling gets confused.
|
|
*/
|
|
if (wiphy_list) {
|
|
l_warn("Destroying existing list of wiphy devices");
|
|
l_queue_destroy(wiphy_list, NULL);
|
|
}
|
|
|
|
if (!l_genl_family_register(nl80211, "config", wiphy_config_notify,
|
|
NULL, NULL))
|
|
l_error("Registering for config notification failed");
|
|
|
|
if (!l_genl_family_register(nl80211, "scan", wiphy_scan_notify,
|
|
NULL, NULL))
|
|
l_error("Registering for scan notification failed");
|
|
|
|
if (!l_genl_family_register(nl80211, "mlme", wiphy_mlme_notify,
|
|
NULL, NULL))
|
|
l_error("Registering for MLME notification failed");
|
|
|
|
if (!l_genl_family_register(nl80211, "regulatory",
|
|
wiphy_regulatory_notify, NULL, NULL))
|
|
l_error("Registering for regulatory notification failed");
|
|
|
|
wiphy_list = l_queue_new();
|
|
|
|
msg = l_genl_msg_new(NL80211_CMD_GET_PROTOCOL_FEATURES);
|
|
if (!l_genl_family_send(nl80211, msg, protocol_features_callback,
|
|
NULL, NULL))
|
|
l_error("Getting protocol features failed");
|
|
l_genl_msg_unref(msg);
|
|
|
|
msg = l_genl_msg_new(NL80211_CMD_GET_REG);
|
|
if (!l_genl_family_send(nl80211, msg, regulatory_info_callback,
|
|
NULL, NULL))
|
|
l_error("Getting regulatory info failed");
|
|
l_genl_msg_unref(msg);
|
|
|
|
msg = l_genl_msg_new(NL80211_CMD_GET_WIPHY);
|
|
if (!l_genl_family_dump(nl80211, msg, wiphy_dump_callback, NULL, NULL))
|
|
l_error("Getting all wiphy devices failed");
|
|
l_genl_msg_unref(msg);
|
|
|
|
msg = l_genl_msg_new(NL80211_CMD_GET_INTERFACE);
|
|
if (!l_genl_family_dump(nl80211, msg, interface_dump_callback,
|
|
NULL, NULL))
|
|
l_error("Getting all interface information failed");
|
|
l_genl_msg_unref(msg);
|
|
}
|
|
|
|
static void nl80211_vanished(void *user_data)
|
|
{
|
|
l_debug("Lost nl80211 interface");
|
|
|
|
l_queue_destroy(wiphy_list, wiphy_free);
|
|
wiphy_list = NULL;
|
|
}
|
|
|
|
bool wiphy_init(void)
|
|
{
|
|
if (genl)
|
|
return false;
|
|
|
|
genl = l_genl_new_default();
|
|
if (!genl) {
|
|
l_error("Failed to open generic netlink socket");
|
|
return false;
|
|
}
|
|
|
|
if (getenv("IWD_GENL_DEBUG"))
|
|
l_genl_set_debug(genl, do_debug, "[GENL] ", NULL);
|
|
|
|
l_debug("Opening nl80211 interface");
|
|
|
|
nl80211 = l_genl_family_new(genl, NL80211_GENL_NAME);
|
|
if (!nl80211) {
|
|
l_error("Failed to open nl80211 interface");
|
|
goto failed;
|
|
}
|
|
|
|
l_genl_family_set_watches(nl80211, nl80211_appeared, nl80211_vanished,
|
|
NULL, NULL);
|
|
|
|
return true;
|
|
|
|
failed:
|
|
l_genl_unref(genl);
|
|
genl = NULL;
|
|
|
|
return false;
|
|
}
|
|
|
|
bool wiphy_exit(void)
|
|
{
|
|
if (!genl)
|
|
return false;
|
|
|
|
l_debug("Closing nl80211 interface");
|
|
|
|
/*
|
|
* The generic netlink master object keeps track of all families
|
|
* and closing it will take care of freeing all associated resources.
|
|
*/
|
|
l_genl_unref(genl);
|
|
genl = NULL;
|
|
|
|
/*
|
|
* This is an extra sanity check so that no memory is leaked
|
|
* in case the generic netlink handling forgets to call the
|
|
* vanished callback.
|
|
*/
|
|
if (wiphy_list) {
|
|
l_warn("Found leftover list of wiphy devices");
|
|
l_queue_destroy(wiphy_list, wiphy_free);
|
|
wiphy_list = NULL;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void wiphy_check_dellink(void *data, void *user_data)
|
|
{
|
|
uint32_t index = L_PTR_TO_UINT(user_data);
|
|
struct wiphy *wiphy = data;
|
|
struct netdev *netdev;
|
|
|
|
netdev = l_queue_remove_if(wiphy->netdev_list, netdev_match,
|
|
L_UINT_TO_PTR(index));
|
|
if (netdev) {
|
|
l_warn("Removing leftover interface %s", netdev->name);
|
|
netdev_free(netdev);
|
|
}
|
|
}
|
|
|
|
void wiphy_notify_dellink(uint32_t index)
|
|
{
|
|
if (!wiphy_list)
|
|
return;
|
|
|
|
l_queue_foreach(wiphy_list, wiphy_check_dellink, L_UINT_TO_PTR(index));
|
|
}
|