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authorMartin Weinelt <hexa@darmstadt.ccc.de>2021-06-26 00:01:07 +0200
committerDavid Bauer <mail@david-bauer.net>2021-07-06 02:26:38 +0200
commit398df6275674b637bc950e4f946f84c2bc5e09ff (patch)
tree5f87cf8b68d7ddf4445d4aa6194efc3292e4ca06
parent64ce35bfafb14a0d0e86990037be5c437babead0 (diff)
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hostapd: report bssid, ssid and channel over ubus
Imports a function from iw to convert frequencies to channel numbers. Co-authored-by: David Bauer <mail@david-bauer.net> Signed-off-by: Martin Weinelt <hexa@darmstadt.ccc.de> [fix potential out of bounds read] Signed-off-by: David Bauer <mail@david-bauer.net>
-rw-r--r--package/network/services/hostapd/src/src/ap/ubus.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/package/network/services/hostapd/src/src/ap/ubus.c b/package/network/services/hostapd/src/src/ap/ubus.c
index 7cc2059fc1..289c8ff7a4 100644
--- a/package/network/services/hostapd/src/src/ap/ubus.c
+++ b/package/network/services/hostapd/src/src/ap/ubus.c
@@ -372,6 +372,32 @@ hostapd_bss_get_features(struct ubus_context *ctx, struct ubus_object *obj,
return 0;
}
+/* Imported from iw/util.c
+ * https://git.kernel.org/pub/scm/linux/kernel/git/jberg/iw.git/tree/util.c?id=4b25ae3537af48dbf9d0abf94132e5ba01b32c18#n200
+ */
+int ieee80211_frequency_to_channel(int freq)
+{
+ /* see 802.11-2007 17.3.8.3.2 and Annex J */
+ if (freq == 2484)
+ return 14;
+ /* see 802.11ax D6.1 27.3.23.2 and Annex E */
+ else if (freq == 5935)
+ return 2;
+ else if (freq < 2484)
+ return (freq - 2407) / 5;
+ else if (freq >= 4910 && freq <= 4980)
+ return (freq - 4000) / 5;
+ else if (freq < 5950)
+ return (freq - 5000) / 5;
+ else if (freq <= 45000) /* DMG band lower limit */
+ /* see 802.11ax D6.1 27.3.23.2 */
+ return (freq - 5950) / 5;
+ else if (freq >= 58320 && freq <= 70200)
+ return (freq - 56160) / 2160;
+ else
+ return 0;
+}
+
static int
hostapd_bss_get_status(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
@@ -380,12 +406,24 @@ hostapd_bss_get_status(struct ubus_context *ctx, struct ubus_object *obj,
struct hostapd_data *hapd = container_of(obj, struct hostapd_data, ubus.obj);
void *airtime_table, *dfs_table;
struct os_reltime now;
+ char ssid[SSID_MAX_LEN + 1];
char phy_name[17];
char mac_buf[20];
+ size_t ssid_len = SSID_MAX_LEN;
+
+ if (hapd->conf->ssid.ssid_len < SSID_MAX_LEN)
+ ssid_len = hapd->conf->ssid.ssid_len;
blob_buf_init(&b, 0);
blobmsg_add_string(&b, "status", hostapd_state_text(hapd->iface->state));
+ blobmsg_printf(&b, "bssid", MACSTR, MAC2STR(hapd->conf->bssid));
+
+ memset(ssid, 0, SSID_MAX_LEN + 1);
+ memcpy(ssid, hapd->conf->ssid.ssid, ssid_len);
+ blobmsg_add_string(&b, "ssid", ssid);
+
blobmsg_add_u32(&b, "freq", hapd->iface->freq);
+ blobmsg_add_u32(&b, "channel", ieee80211_frequency_to_channel(hapd->iface->freq));
snprintf(phy_name, 17, "%s", hapd->iface->phy);
blobmsg_add_string(&b, "phy", phy_name);