iw: scan: parse OWE Transition Mode element

This adds code to parse the Opportunistic Wireless Encryption Transition
Mode element.

Without this patch the output looks like this:
WFA 0x1c, data: 00 37 b7 36 dc 0c 08 4f 70 65 6e 57 72 74 34
With this patch it looks like this:
        OWE Transition Mode:
                BSSID: 00:37:b7:36:dc:0c
                SSID: OpenWrt4

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/scan.c b/scan.c
index 7695216faa1b895b8ac5c8e088949de96707c761..a798c70a7dccbcaab40432c52faa67f0dffa92b3 100644 (file)
--- a/scan.c
+++ b/scan.c
@@ -1950,10 +1950,39 @@ static inline void print_hs20_ind(const uint8_t type, uint8_t len,
                printf("\t\tUnexpected length: %i\n", len);
 }
 
+static void print_wifi_owe_tarns(const uint8_t type, uint8_t len,
+                                const uint8_t *data,
+                                const struct print_ies_data *ie_buffer)
+{
+       char mac_addr[20];
+       int ssid_len;
+
+       printf("\n");
+       if (len < 7)
+               return;
+
+       mac_addr_n2a(mac_addr, data);
+       printf("\t\tBSSID: %s\n", mac_addr);
+
+       ssid_len = data[6];
+       if (ssid_len > len - 7)
+               return;
+       printf("\t\tSSID: ");
+       print_ssid_escaped(ssid_len, data + 7);
+       printf("\n");
+
+       /* optional elements */
+       if (len >= ssid_len + 9) {
+               printf("\t\tBand Info: %u\n", data[ssid_len + 7]);
+               printf("\t\tChannel Info: %u\n", data[ssid_len + 8]);
+       }
+}
+
 static const struct ie_print wfa_printers[] = {
        [9] = { "P2P", print_p2p, 2, 255, BIT(PRINT_SCAN), },
        [16] = { "HotSpot 2.0 Indication", print_hs20_ind, 1, 255, BIT(PRINT_SCAN), },
        [18] = { "HotSpot 2.0 OSEN", print_wifi_osen, 1, 255, BIT(PRINT_SCAN), },
+       [28] = { "OWE Transition Mode", print_wifi_owe_tarns, 7, 255, BIT(PRINT_SCAN), },
 };
 
 static void print_vendor(unsigned char len, unsigned char *data,