src/network/networkd-wifi.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <net/ethernet.h>
   4 #include <linux/nl80211.h>
   5
   6 #include "sd-bus.h"
   7
   8 #include "bus-util.h"
   9 #include "ether-addr-util.h"
  10 #include "netlink-internal.h"
  11 #include "netlink-util.h"
  12 #include "networkd-link.h"
  13 #include "networkd-manager.h"
  14 #include "networkd-wifi.h"
  15 #include "string-util.h"
  16 #include "wifi-util.h"
  17
  18 int wifi_get_info(Link *link) {
  19         const char *type;
  20         int r, s = 0;
  21
  22         assert(link);
  23
  24         if (!link->sd_device)
  25                 return 0;
  26
  27         r = sd_device_get_devtype(link->sd_device, &type);
  28         if (r == -ENOENT)
  29                 return 0;
  30         else if (r < 0)
  31                 return r;
  32
  33         if (!streq(type, "wlan"))
  34                 return 0;
  35
  36         _cleanup_free_ char *ssid = NULL;
  37         r = wifi_get_interface(link->manager->genl, link->ifindex, &link->wlan_iftype, &ssid);
  38         if (r < 0)
  39                 return r;
  40         if (r > 0 && streq_ptr(link->ssid, ssid))
  41                 r = 0;
  42         free_and_replace(link->ssid, ssid);
  43
  44         if (link->wlan_iftype == NL80211_IFTYPE_STATION) {
  45                 struct ether_addr old_bssid = link->bssid;
  46                 s = wifi_get_station(link->manager->genl, link->ifindex, &link->bssid);
  47                 if (s < 0)
  48                         return s;
  49                 if (s > 0 && memcmp(&old_bssid, &link->bssid, sizeof old_bssid) == 0)
  50                         s = 0;
  51         }
  52
  53         if (r > 0 || s > 0) {
  54                 char buf[ETHER_ADDR_TO_STRING_MAX];
  55
  56                 if (link->wlan_iftype == NL80211_IFTYPE_STATION && link->ssid)
  57                         log_link_info(link, "Connected WiFi access point: %s (%s)",
  58                                       link->ssid, ether_addr_to_string(&link->bssid, buf));
  59                 return 1;
  60         }
  61         return 0;
  62 }