iw: scan: parse tx power envelope

[thirdparty/iw.git] / scan.c

diff --git a/scan.c b/scan.c
index de4c5836fe72b152a0b20f60bf315fef8e32582b..047f34c19d9907565ebeb80f1294ef66b94c9353 100644 (file)
--- a/scan.c
+++ b/scan.c
@@ -1224,6 +1224,36 @@ static void print_11u_rcon(const uint8_t type, uint8_t len, const uint8_t *data,
        }
 }
 
+static void print_tx_power_envelope(const uint8_t type, uint8_t len,
+                                   const uint8_t *data,
+                                   const struct print_ies_data *ie_buffer)
+{
+       const uint8_t local_max_tx_power_count = data[0] & 7;
+       const uint8_t local_max_tx_power_unit_interp = (data[0] >> 3) & 7;
+       int i;
+       static const char *power_names[] = {
+               "Local Maximum Transmit Power For 20 MHz",
+               "Local Maximum Transmit Power For 40 MHz",
+               "Local Maximum Transmit Power For 80 MHz",
+               "Local Maximum Transmit Power For 160/80+80 MHz",
+       };
+
+       printf("\n");
+
+       if (local_max_tx_power_count + 2 != len)
+               return;
+       if (local_max_tx_power_unit_interp != 0)
+               return;
+       for (i = 0; i < local_max_tx_power_count + 1; ++i) {
+               int8_t power_val = ((int8_t)data[1 + i]) >> 1;
+               int8_t point5 = data[1 + i] & 1;
+               if (point5)
+                       printf("\t\t * %s: %i.5 dBm\n", power_names[i], power_val);
+               else
+                       printf("\t\t * %s: %i dBm\n", power_names[i], power_val);
+       }
+}
+
 static const char *ht_secondary_offset[4] = {
        "no secondary",
        "above",
@@ -1637,6 +1667,7 @@ static const struct ie_print ieprinters[] = {
        [107] = { "802.11u Interworking", print_interworking, 0, 255, BIT(PRINT_SCAN), },
        [108] = { "802.11u Advertisement", print_11u_advert, 0, 255, BIT(PRINT_SCAN), },
        [111] = { "802.11u Roaming Consortium", print_11u_rcon, 0, 255, BIT(PRINT_SCAN), },
+       [195] = { "Transmit Power Envelope", print_tx_power_envelope, 2, 5, BIT(PRINT_SCAN), },
 };
 
 static void print_wifi_wpa(const uint8_t type, uint8_t len, const uint8_t *data,