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monitor: Add decoder for HT Capabilities field

This commit is contained in:
Denis Kenzior 2015-05-07 21:33:07 -05:00
parent 2948f2d933
commit 96d0703eb3
1 changed files with 120 additions and 2 deletions
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122
monitor/nlmon.c
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@ -1210,6 +1210,122 @@ static void print_ie_extended_capabilities(unsigned int level,
bytes, extended_capabilities_bitfield);
}
static void print_ie_ht_capabilities(unsigned int level,
const char *label,
const void *data, uint16_t size)
{
static const char *ht_capabilities_info_bitfield[16] = {
[0] = "LDPC Coding Capability",
[1] = "Supported Channel Width Set",
[2] = "SM Power Save",
[3] = "SM Power Save",
[4] = "HT-Greenfield",
[5] = "Short GI for 20Mhz",
[6] = "Short GI for 40Mhz",
[7] = "Tx STBC",
[8] = "Rx STBC",
[9] = "Rx STBC",
[10] = "HT-Delayed Block Ack",
[11] = "Maximum A-MSDU Length",
[12] = "DSSS/CCK Mode in 40Mhz",
[13] = "Reserved",
[14] = "40 Mhz Intolerant",
[15] = "L-SIG TXOP Protection Support",
};
static const char *ht_capabilities_sm_power_save[4] = {
"Static", "Dynamic", "Reserved", "Disabled",
};
static const char *ht_capabilities_rx_stbc[4] = {
"Disabled", "One spatial stream", "One and two spatial streams",
"One, two and three spatial streams"
};
static const char *ht_capabilities_min_mpdu_start_spacing[8] = {
"No restriction", "1/4 us", "1/2 us", "1 us", "2 us",
"4 us", "8 us", "16 us",
};
static const char *ht_capabilities_pco_transition_time[4] = {
"No transition", "400 us", "1.5 ms", "5 ms",
};
static const char *ht_capabilities_mcs_feedback[4] = {
"No feedback", "Reserved", "Unsolicited", "Both",
};
uint8_t info_mask[] = { 0x03, 0xfc };
const uint8_t *htc = data;
uint8_t sm_power_save;
uint8_t rx_stbc;
uint8_t ampdu_exponent;
bool pco;
bool plus_htc;
bool rd_responder;
uint8_t bits;
print_attr(level, "%s: len %u", label, size);
if (size != 26)
return;
/* Print bits 0-1 */
print_ie_bitfield(level + 1, "HT Capabilities Info", data, info_mask,
1, ht_capabilities_info_bitfield);
/* Print SM Power Save */
sm_power_save = util_bit_field(htc[0], 2, 2);
print_attr(level + 1, "HT Capabilities Info: bits 2-3: %s",
ht_capabilities_sm_power_save[sm_power_save]);
/* Print bits 4-7 */
info_mask[0] = 0xf0;
print_ie_bitfield(level + 1, "HT Capabilities Info", data, info_mask,
1, ht_capabilities_info_bitfield);
rx_stbc = util_bit_field(htc[1], 0, 2);
print_attr(level + 1, "HT Capabilities Info: bits 8-9: %s",
ht_capabilities_rx_stbc[rx_stbc]);
/* Print bits 10-15 */
info_mask[0] = 0x00;
print_ie_bitfield(level + 1, "HT Capabilities Info", data, info_mask,
2, ht_capabilities_info_bitfield);
ampdu_exponent = util_bit_field(htc[2], 0, 2);
print_attr(level + 1, "A-MPDU Parameters: "
"Maximum A-MPDU Length Exponent: %d", ampdu_exponent);
bits = util_bit_field(htc[2], 2, 3);
print_attr(level + 1, "A-MPDU Parameters: "
"Minimum MPDU Start Spacing: %s",
ht_capabilities_min_mpdu_start_spacing[bits]);
print_ie_mcs(level + 1, "Suppored MCS", htc + 3, 16);
pco = util_is_bit_set(htc[18], 0);
print_attr(level + 1, "HT Extended Capabilities: PCO: %s",
bits ? "supported" : "not supported");
if (pco) {
bits = util_bit_field(htc[18], 1, 2);
print_attr(level + 1, "HT Extended Capabilities: "
"PCO Transition Time: %s",
ht_capabilities_pco_transition_time[bits]);
}
bits = util_bit_field(htc[19], 0, 2);
print_attr(level + 1, "HT Extended Capabilities: "
"MCS Feedback: %s", ht_capabilities_mcs_feedback[bits]);
plus_htc = util_is_bit_set(htc[19], 2);
print_attr(level + 1, "HT Extended Capabilities: "
"+HTC: %s", plus_htc ? "supported" : "not supported");
rd_responder = util_is_bit_set(htc[19], 3);
print_attr(level + 1, "HT Extended Capabilities: "
"RD Responder: %s",
rd_responder ? "supported" : "not supported");
/* TODO: Transmit Beamforming Capabilities field */
/* TODO: ASEL Capability field */
}
static struct attr_entry ie_entry[] = {
{ IE_TYPE_SSID, "SSID",
ATTR_CUSTOM, { .function = print_ie_ssid } },
@ -1239,6 +1355,8 @@ static struct attr_entry ie_entry[] = {
ATTR_CUSTOM, { .function = print_ie_vendor } },
{ IE_TYPE_EXTENDED_CAPABILITIES, "Extended Capabilities",
ATTR_CUSTOM, { .function = print_ie_extended_capabilities } },
{ IE_TYPE_HT_CAPABILITIES, "HT Capabilities",
ATTR_CUSTOM, { .function = print_ie_ht_capabilities } },
{ },
};
@ -1946,8 +2064,8 @@ static const struct attr_entry attr_table[] = {
"BSS Short Preamble", ATTR_U8 },
{ NL80211_ATTR_BSS_SHORT_SLOT_TIME,
"BSS Short Slot Time", ATTR_U8 },
{ NL80211_ATTR_HT_CAPABILITY,
"HT Capability" },
{ NL80211_ATTR_HT_CAPABILITY, "HT Capability",
ATTR_CUSTOM, { .function = print_ie_ht_capabilities } },
{ NL80211_ATTR_SUPPORTED_IFTYPES,
"Supported Interface Types", ATTR_NESTED,
{ iftype_table } },