---
scan.c | 156 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 150 insertions(+), 6 deletions(-)
diff --git a/scan.c b/scan.c
index 91e94ed..d383243 100644
--- a/scan.c
+++ b/scan.c
@@ -13,6 +13,9 @@
#include "nl80211.h"
#include "iw.h"
+static unsigned char vendor_oui[3] = { 0x00, 0x50, 0xf2 };
+static unsigned char cipher_oui[3] = { 0x00, 0x0f, 0xac };
+
struct scan_params {
bool unknown;
};
@@ -41,6 +44,14 @@ COMMAND(scan, trigger, NULL,
typedef void (*printfn)(unsigned char type, unsigned char len, unsigned char *data);
+static void tab_on_first(bool *first)
+{
+ if (!*first)
+ printf("\t");
+ else
+ *first = false;
+}
+
static void print_ssid(unsigned char type, unsigned char len, unsigned char *data)
{
int i;
@@ -80,20 +91,152 @@ static void print_ign(unsigned char type, unsigned char len, unsigned char *data
/* ignore for now, not too useful */
}
+static void print_cipher(const unsigned char *oui, unsigned char *data)
+{
+ if (memcmp(data, oui, 3) == 0) {
+ switch (data[3]) {
+ case 0x00:
+ printf("Use group cipher suite");
+ break;
+ case 0x01:
+ printf("WEP-40");
+ break;
+ case 0x02:
+ printf("TKIP");
+ break;
+ case 0x04:
+ printf("CCMP");
+ break;
+ case 0x05:
+ printf("WEP-104");
+ break;
+ default:
+ printf("Reserved (%.02x)", data[3]);
+ break;
+ }
+ } else if (memcmp(data, vendor_oui, 3) == 0)
+ printf("Vendor specific (%.02x)", data[3]);
+ else
+ printf("Other");
+}
+
+static void print_auth(const unsigned char *oui, unsigned char *data)
+{
+ if (memcmp(data, oui, 3) == 0) {
+ switch (data[3]) {
+ case 0x01:
+ printf("802.1x");
+ break;
+ case 0x02:
+ printf("PSK");
+ break;
+ default:
+ printf("Reserved (%.02x)", data[3]);
+ break;
+ }
+ } else if (memcmp(data, vendor_oui, 3) == 0)
+ printf("Vendor specific (%.02x)", data[3]);
+ else
+ printf("Other");
+}
+
+static void print_wpa(const char *ie, const unsigned char *oui,
+ unsigned char len, unsigned char *data)
+{
+ bool first = true;
+ __u16 version, count, capa;
+ int i;
+
+ printf("\t%s:", ie);
+
+ if (len < 2) {
+ printf(" <too short> data:");
+ for(i = 0; i < len; i++)
+ printf(" %.02x", data[i]);
+ printf("\n");
+ return;
+ }
+
+ version = data[0] + (data[1] << 8);
+ tab_on_first(&first);
+ printf("\t * Version: %d\n", version);
+
+ data += 2;
+ len -= 2;
+
+ if (len < 4) {
+ tab_on_first(&first);
+ printf("\t * Group cipher: TKIP\n");
+ printf("\t * Pairwise ciphers: TKIP\n");
+ return;
+ }
+
+ tab_on_first(&first);
+ printf("\t * Group cipher: ");
+ print_cipher(oui, data);
+ printf("\n");
+
+ data += 4;
+ len -= 4;
+
+ if (len < 2) {
+ tab_on_first(&first);
+ printf("\t * Pairwise ciphers: TKIP\n");
+ return;
+ }
+
+ count = data[0] | (data[1] << 8);
+ tab_on_first(&first);
+ printf("\t * Pairwise ciphers:");
+ for (i=0; i<count; i++) {
+ printf(" ");
+ print_cipher(oui, data + 2 + (i * 4));
+ }
+ printf("\n");
+
+ data += 2 + (count * 4);
+ len -= 2 + (count * 4);
+
+ if (len < 2)
+ return;
+
+ count = data[0] | (data[1] << 8);
+ tab_on_first(&first);
+ printf("\t * Authentication suites:");
+ for (i=0; i<count; i++) {
+ printf(" ");
+ print_auth(oui, data + 2 + (i * 4));
+ }
+ printf("\n");
+
+ data += 2 + (count * 4);
+ len -= 2 + (count * 4);
+
+ if (len < 2)
+ return;
+
+ capa = data[0] | (data[1] << 8);
+ tab_on_first(&first);
+ printf("\t * Capabilities: 0x%.4x\n", capa);
+}
+
+static void print_rsn(unsigned char type, unsigned char len, unsigned char *data)
+{
+ print_wpa("WPA2", cipher_oui, len, data);
+}
+
static const printfn ieprinters[] = {
[0] = print_ssid,
[1] = print_supprates,
[3] = print_ds,
[5] = print_ign,
+ [48] = print_rsn,
[50] = print_supprates,
};
-static void tab_on_first(bool *first)
+static void print_wifi_wpa(unsigned char type, unsigned char len, unsigned char *data)
{
- if (!*first)
- printf("\t");
- else
- *first = false;
+ print_wpa("WPA", vendor_oui, len, data);
}
static void print_wifi_wps(unsigned char type, unsigned char len, unsigned char *data)
@@ -177,6 +320,7 @@ static void print_wifi_wps(unsigned char type, unsigned char len, unsigned char
}
static const printfn wifiprinters[] = {
+ [1] = print_wifi_wpa,
[4] = print_wifi_wps,
};
@@ -193,7 +337,7 @@ static void print_vendor(unsigned char len, unsigned char *data,
return;
}
- if (len >= 4 && data[0] == 0x00 && data[1] == 0x50 && data[2] == 0xF2) {
+ if (len >= 4 && memcmp(data, vendor_oui, 3) == 0) {
if (data[3] < ARRAY_SIZE(wifiprinters) && wifiprinters[data[3]])
return wifiprinters[data[3]](data[3], len - 4, data + 4);
if (!params->unknown)
--
1.6.0.6
--
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