[PATCH] iw: Add more VHT capabilities reporting

[Anthony Refuerzo <anthony96922@gmail.com>]

Add extra reporting for VHT capabilities. These were not previously shown.
---
 scan.c | 12 ++++++++++++
 util.c | 26 ++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/scan.c b/scan.c
index dfc136a..9bfa014 100644
--- a/scan.c
+++ b/scan.c
@@ -1508,6 +1508,8 @@ static void print_vht_capa(const uint8_t type, uint8_t len, const uint8_t *data,
 static void print_vht_oper(const uint8_t type, uint8_t len, const uint8_t *data,
 			   const struct print_ies_data *ie_buffer)
 {
+	__u16 tmp;
+	int i;
 	const char *chandwidths[] = {
 		[0] = "20 or 40 MHz",
 		[1] = "80 MHz",
@@ -1521,6 +1523,16 @@ static void print_vht_oper(const uint8_t type, uint8_t len, const uint8_t *data,
 	printf("\t\t * center freq segment 1: %d\n", data[1]);
 	printf("\t\t * center freq segment 2: %d\n", data[2]);
 	printf("\t\t * VHT basic MCS set: 0x%.2x%.2x\n", data[4], data[3]);
+	tmp = data[3] | (data[4] << 8);
+	for (i = 1; i <= 8; i++) {
+		printf("\t\t\t%d streams: ", i);
+		switch ((tmp >> ((i-1)*2) ) & 3) {
+		case 0: printf("MCS 0-7\n"); break;
+		case 1: printf("MCS 0-8\n"); break;
+		case 2: printf("MCS 0-9\n"); break;
+		case 3: printf("not supported\n"); break;
+		}
+	}
 }
 
 static void print_supp_op_classes(const uint8_t type, uint8_t len,
diff --git a/util.c b/util.c
index 8a2ba10..c026f8b 100644
--- a/util.c
+++ b/util.c
@@ -1125,16 +1125,42 @@ void print_vht_info(__u32 capa, const __u8 *mcs)
 	PRINT_VHT_CAPA(6, "short GI (160/80+80 MHz)");
 	PRINT_VHT_CAPA(7, "TX STBC");
 	/* RX STBC */
+	switch ((capa & 0x700) >> 8) {
+	case 1: printf("\t\t\tRX STBC 1-stream\n"); break;
+	case 2: printf("\t\t\tRX STBC 2-streams\n"); break;
+	case 3: printf("\t\t\tRX STBC 3-streams\n"); break;
+	case 4: printf("\t\t\tRX STBC 4-streams\n"); break;
+	case 5: printf("\t\t\tRX STBC 5-streams\n"); break;
+	case 6: printf("\t\t\tRX STBC 6-streams\n"); break;
+	case 7: printf("\t\t\tRX STBC 7-streams\n"); break;
+	default: printf("\t\t\tNo RX STBC\n");
+	}
 	PRINT_VHT_CAPA(11, "SU Beamformer");
 	PRINT_VHT_CAPA(12, "SU Beamformee");
 	/* compressed steering */
+	printf("\t\t\tCompressed Steering Number of Beamformer Antennas: %d\n",
+		((capa & 0xe000) >> 13) + 1);
 	/* # of sounding dimensions */
+	printf("\t\t\tNumber of Sounding Dimensions: %d\n",
+		((capa & 0x70000) >> 16) + 1);
 	PRINT_VHT_CAPA(19, "MU Beamformer");
 	PRINT_VHT_CAPA(20, "MU Beamformee");
 	PRINT_VHT_CAPA(21, "VHT TXOP PS");
 	PRINT_VHT_CAPA(22, "+HTC-VHT");
 	/* max A-MPDU */
+	printf("\t\t\tMax A-MPDU Length: %d (exponent: %d)\n",
+		(1 << (((capa & 0x3800000) >> 23) + 13)) - 1,
+		((capa & 0x3800000) >> 23));
 	/* VHT link adaptation */
+	if (capa & 0xc000000) {
+		printf("\t\t\tVHT Link Adaptation: ");
+		switch ((capa & 0xc000000) >> 26) {
+		case 1: printf("(reserved)\n"); break;
+		case 2: printf("Unsolicited\n"); break;
+		case 3: printf("Both Solicited and Unsolicited\n"); break;
+		default: printf("No Feedback\n"); break;
+		}
+	}
 	PRINT_VHT_CAPA(28, "RX antenna pattern consistency");
 	PRINT_VHT_CAPA(29, "TX antenna pattern consistency");
 
-- 
2.30.2