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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2010 Red Hat, Inc.
*/
/*
* The example shows how to get info about APs visible by Wi-Fi devices using
* libnm.
*
* Compile with:
* gcc -Wall get-ap-info-libnm.c -o get-ap-info-libnm `pkg-config --libs --cflags libnm`
*/
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <NetworkManager.h>
/* Convert flags to string */
static char *
ap_wpa_rsn_flags_to_string(guint32 flags)
{
char *flags_str[16]; /* Enough space for flags and terminating NULL */
char *ret_str;
int i = 0;
if (flags & NM_802_11_AP_SEC_PAIR_WEP40)
flags_str[i++] = g_strdup("pair_wpe40");
if (flags & NM_802_11_AP_SEC_PAIR_WEP104)
flags_str[i++] = g_strdup("pair_wpe104");
if (flags & NM_802_11_AP_SEC_PAIR_TKIP)
flags_str[i++] = g_strdup("pair_tkip");
if (flags & NM_802_11_AP_SEC_PAIR_CCMP)
flags_str[i++] = g_strdup("pair_ccmp");
if (flags & NM_802_11_AP_SEC_GROUP_WEP40)
flags_str[i++] = g_strdup("group_wpe40");
if (flags & NM_802_11_AP_SEC_GROUP_WEP104)
flags_str[i++] = g_strdup("group_wpe104");
if (flags & NM_802_11_AP_SEC_GROUP_TKIP)
flags_str[i++] = g_strdup("group_tkip");
if (flags & NM_802_11_AP_SEC_GROUP_CCMP)
flags_str[i++] = g_strdup("group_ccmp");
if (flags & NM_802_11_AP_SEC_KEY_MGMT_PSK)
flags_str[i++] = g_strdup("psk");
if (flags & NM_802_11_AP_SEC_KEY_MGMT_802_1X)
flags_str[i++] = g_strdup("802.1X");
if (flags & NM_802_11_AP_SEC_KEY_MGMT_SAE)
flags_str[i++] = g_strdup("sae");
if (flags & NM_802_11_AP_SEC_KEY_MGMT_OWE)
flags_str[i++] = g_strdup("owe");
if (flags & NM_802_11_AP_SEC_KEY_MGMT_OWE_TM)
flags_str[i++] = g_strdup("owe_transition_mode");
if (flags & NM_802_11_AP_SEC_KEY_MGMT_EAP_SUITE_B_192)
flags_str[i++] = g_strdup("wpa-eap-suite-b-192");
if (i == 0)
flags_str[i++] = g_strdup("none");
flags_str[i] = NULL;
ret_str = g_strjoinv(" ", flags_str);
i = 0;
while (flags_str[i])
g_free(flags_str[i++]);
return ret_str;
}
static void
show_access_point_info(NMAccessPoint *ap)
{
guint32 flags, wpa_flags, rsn_flags, freq, bitrate;
guint8 strength;
GBytes *ssid;
const char *hwaddr;
NM80211Mode mode;
char *freq_str, *ssid_str, *bitrate_str, *strength_str, *wpa_flags_str, *rsn_flags_str;
GString *security_str;
/* Get AP properties */
flags = nm_access_point_get_flags(ap);
wpa_flags = nm_access_point_get_wpa_flags(ap);
rsn_flags = nm_access_point_get_rsn_flags(ap);
ssid = nm_access_point_get_ssid(ap);
hwaddr = nm_access_point_get_bssid(ap);
freq = nm_access_point_get_frequency(ap);
mode = nm_access_point_get_mode(ap);
bitrate = nm_access_point_get_max_bitrate(ap);
strength = nm_access_point_get_strength(ap);
/* Convert to strings */
if (ssid)
ssid_str = nm_utils_ssid_to_utf8(g_bytes_get_data(ssid, NULL), g_bytes_get_size(ssid));
else
ssid_str = g_strdup("--");
freq_str = g_strdup_printf("%u MHz", freq);
bitrate_str = g_strdup_printf("%u Mbit/s", bitrate / 1000);
strength_str = g_strdup_printf("%u", strength);
wpa_flags_str = ap_wpa_rsn_flags_to_string(wpa_flags);
rsn_flags_str = ap_wpa_rsn_flags_to_string(rsn_flags);
security_str = g_string_new(NULL);
if (!(flags & NM_802_11_AP_FLAGS_PRIVACY) && (wpa_flags != NM_802_11_AP_SEC_NONE)
&& (rsn_flags != NM_802_11_AP_SEC_NONE))
g_string_append(security_str, "Encrypted: ");
if ((flags & NM_802_11_AP_FLAGS_PRIVACY) && (wpa_flags == NM_802_11_AP_SEC_NONE)
&& (rsn_flags == NM_802_11_AP_SEC_NONE))
g_string_append(security_str, "WEP ");
if (wpa_flags != NM_802_11_AP_SEC_NONE)
g_string_append(security_str, "WPA ");
if ((rsn_flags & NM_802_11_AP_SEC_KEY_MGMT_PSK)
|| (rsn_flags & NM_802_11_AP_SEC_KEY_MGMT_802_1X)) {
g_string_append(security_str, "WPA2 ");
}
if (rsn_flags & NM_802_11_AP_SEC_KEY_MGMT_SAE) {
g_string_append(security_str, "WPA3 ");
}
if ((rsn_flags & NM_802_11_AP_SEC_KEY_MGMT_OWE)
|| (rsn_flags & NM_802_11_AP_SEC_KEY_MGMT_OWE_TM)) {
g_string_append(security_str, "OWE ");
}
if ((wpa_flags & NM_802_11_AP_SEC_KEY_MGMT_802_1X)
|| (rsn_flags & NM_802_11_AP_SEC_KEY_MGMT_802_1X)) {
g_string_append(security_str, "802.1X ");
}
if (security_str->len > 0)
g_string_truncate(security_str, security_str->len - 1); /* Chop off last space */
printf("SSID: %s\n", ssid_str);
printf("BSSID: %s\n", hwaddr);
printf("Mode: %s\n",
mode == NM_802_11_MODE_ADHOC ? "Ad-Hoc"
: mode == NM_802_11_MODE_INFRA ? "Infrastructure"
: "Unknown");
printf("Freq: %s\n", freq_str);
printf("Bitrate: %s\n", bitrate_str);
printf("Strength: %s\n", strength_str);
printf("Security: %s\n", security_str->str);
printf("WPA flags: %s\n", wpa_flags_str);
printf("RSN flags: %s\n", rsn_flags_str);
printf("D-Bus path: %s\n\n", nm_object_get_path(NM_OBJECT(ap)));
g_free(ssid_str);
g_free(freq_str);
g_free(bitrate_str);
g_free(strength_str);
g_free(wpa_flags_str);
g_free(rsn_flags_str);
g_string_free(security_str, TRUE);
}
static void
show_wifi_device_info(NMDevice *device)
{
NMAccessPoint *active_ap = NULL;
const GPtrArray *aps;
const char *iface;
const char *driver;
guint32 speed;
GBytes *active_ssid;
char *active_ssid_str = NULL;
int i;
/* Get active AP */
if (nm_device_get_state(device) == NM_DEVICE_STATE_ACTIVATED) {
if ((active_ap = nm_device_wifi_get_active_access_point(NM_DEVICE_WIFI(device)))) {
active_ssid = nm_access_point_get_ssid(active_ap);
if (active_ssid)
active_ssid_str = nm_utils_ssid_to_utf8(g_bytes_get_data(active_ssid, NULL),
g_bytes_get_size(active_ssid));
else
active_ssid_str = g_strdup("--");
}
}
iface = nm_device_get_iface(device);
driver = nm_device_get_driver(device);
speed = nm_device_wifi_get_bitrate(NM_DEVICE_WIFI(device));
speed /= 1000;
printf("Device: %s ---- Driver: %s ---- Speed: %d Mbit/s ---- Active AP: %s\n",
iface,
driver,
speed,
active_ssid_str ?: "none");
printf("=================================================================================\n");
g_free(active_ssid_str);
/* Get all APs of the Wi-Fi device */
aps = nm_device_wifi_get_access_points(NM_DEVICE_WIFI(device));
/* Print AP details */
for (i = 0; i < aps->len; i++) {
NMAccessPoint *ap = g_ptr_array_index(aps, i);
show_access_point_info(ap);
}
}
int
main(int argc, char *argv[])
{
NMClient *client;
const GPtrArray *devices;
int i;
GError *error = NULL;
/* Get NMClient object */
client = nm_client_new(NULL, &error);
if (!client) {
g_message("Error: Could not create NMClient: %s.", error->message);
g_error_free(error);
return EXIT_FAILURE;
}
/* Get all devices managed by NetworkManager */
devices = nm_client_get_devices(client);
/* Go through the array and process Wi-Fi devices */
for (i = 0; i < devices->len; i++) {
NMDevice *device = g_ptr_array_index(devices, i);
if (NM_IS_DEVICE_WIFI(device))
show_wifi_device_info(device);
}
g_object_unref(client);
return EXIT_SUCCESS;
}
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