info.c - platform/external/iw - Gitiles

 #include <stdbool.h>
 #include <errno.h>
 #include <net/if.h>

 #include <netlink/genl/genl.h>
 #include <netlink/genl/family.h>
 #include <netlink/genl/ctrl.h>
 #include <netlink/msg.h>
 #include <netlink/attr.h>

 #include "nl80211.h"
 #include "iw.h"

 static void print_flag(const char *name, int *open)
 {
 	if (!*open)
 		printf(" (");
 	else
 		printf(", ");
 	printf("%s", name);
 	*open = 1;
 }

 static char *cipher_name(__u32 c)
 {
 	static char buf[20];

 	switch (c) {
 	case 0x000fac01:
 		return "WEP40 (00-0f-ac:1)";
 	case 0x000fac05:
 		return "WEP104 (00-0f-ac:5)";
 	case 0x000fac02:
 		return "TKIP (00-0f-ac:2)";
 	case 0x000fac04:
 		return "CCMP (00-0f-ac:4)";
 	case 0x000fac06:
 		return "CMAC (00-0f-ac:6)";
 	case 0x00147201:
 		return "WPI-SMS4 (00-14-72:1)";
 	default:
 		sprintf(buf, "%.2x-%.2x-%.2x:%d",
 			c >> 24, (c >> 16) & 0xff,
 			(c >> 8) & 0xff, c & 0xff);

 		return buf;
 	}
 }

 static int print_phy_handler(struct nl_msg *msg, void *arg)
 {
 	struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
 	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));

 	struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];

 	struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
 	static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
 		[NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
 		[NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
 		[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
 		[NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
 		[NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
 		[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
 	};

 	struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
 	static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
 		[NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
 		[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
 	};

 	struct nlattr *nl_band;
 	struct nlattr *nl_freq;
 	struct nlattr *nl_rate;
 	struct nlattr *nl_mode;
 	struct nlattr *nl_cmd;
 	struct nlattr *nl_if, *nl_ftype;
 	int bandidx = 1;
 	int rem_band, rem_freq, rem_rate, rem_mode, rem_cmd, rem_ftype, rem_if;
 	int open;

 	nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 		  genlmsg_attrlen(gnlh, 0), NULL);

 	if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
 		return NL_SKIP;

 	if (tb_msg[NL80211_ATTR_WIPHY_NAME])
 		printf("Wiphy %s\n", nla_get_string(tb_msg[NL80211_ATTR_WIPHY_NAME]));

 	nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
 		printf("\tBand %d:\n", bandidx);
 		bandidx++;

 		nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
 			  nla_len(nl_band), NULL);

 #ifdef NL80211_BAND_ATTR_HT_CAPA
 		if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
 			__u16 cap = nla_get_u16(tb_band[NL80211_BAND_ATTR_HT_CAPA]);
 			print_ht_capability(cap);
 		}
 		if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
 			__u8 exponent = nla_get_u8(tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]);
 			print_ampdu_length(exponent);
 		}
 		if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
 			__u8 spacing = nla_get_u8(tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]);
 			print_ampdu_spacing(spacing);
 		}
 		if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
 		    nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]) == 16)
 			print_ht_mcs(nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]));
 #endif

 		printf("\t\tFrequencies:\n");

 		nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
 			uint32_t freq;
 			nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
 				  nla_len(nl_freq), freq_policy);
 			if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
 				continue;
 			freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
 			printf("\t\t\t* %d MHz [%d]", freq, ieee80211_frequency_to_channel(freq));

 			if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
 			    !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
 				printf(" (%.1f dBm)", 0.01 * nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));

 			open = 0;
 			if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED]) {
 				print_flag("disabled", &open);
 				goto next;
 			}
 			if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
 				print_flag("passive scanning", &open);
 			if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
 				print_flag("no IBSS", &open);
 			if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
 				print_flag("radar detection", &open);
  next:
 			if (open)
 				printf(")");
 			printf("\n");
 		}

 		printf("\t\tBitrates (non-HT):\n");

 		nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
 			nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
 				  nla_len(nl_rate), rate_policy);
 			if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
 				continue;
 			printf("\t\t\t* %2.1f Mbps", 0.1 * nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]));
 			open = 0;
 			if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
 				print_flag("short preamble supported", &open);
 			if (open)
 				printf(")");
 			printf("\n");
 		}
 	}

 	if (tb_msg[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 		printf("\tmax # scan SSIDs: %d\n",
 		       nla_get_u8(tb_msg[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]));
 	if (tb_msg[NL80211_ATTR_MAX_SCAN_IE_LEN])
 		printf("\tmax scan IEs length: %d bytes\n",
 		       nla_get_u16(tb_msg[NL80211_ATTR_MAX_SCAN_IE_LEN]));

 	if (tb_msg[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 		unsigned int frag;

 		frag = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 		if (frag != (unsigned int)-1)
 			printf("\tFragmentation threshold: %d\n", frag);
 	}

 	if (tb_msg[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 		unsigned int rts;

 		rts = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 		if (rts != (unsigned int)-1)
 			printf("\tRTS threshold: %d\n", rts);
 	}

 	if (tb_msg[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
 		unsigned char coverage;

 		coverage = nla_get_u8(tb_msg[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
 		/* See handle_distance() for an explanation where the '450' comes from */
 		printf("\tCoverage class: %d (up to %dm)\n", coverage, 450 * coverage);
 	}

 	if (tb_msg[NL80211_ATTR_CIPHER_SUITES]) {
 		int num = nla_len(tb_msg[NL80211_ATTR_CIPHER_SUITES]) / sizeof(__u32);
 		int i;
 		__u32 *ciphers = nla_data(tb_msg[NL80211_ATTR_CIPHER_SUITES]);
 		if (num > 0) {
 			printf("\tSupported Ciphers:\n");
 			for (i = 0; i < num; i++)
 				printf("\t\t* %s\n",
 					cipher_name(ciphers[i]));
 		}
 	}

 	if (tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX] &&
 	    tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX])
 		printf("\tAvailable Antennas: TX %#x RX %#x\n",
 		       nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX]),
 		       nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX]));

 	if (tb_msg[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
 	    tb_msg[NL80211_ATTR_WIPHY_ANTENNA_RX])
 		printf("\tConfigured Antennas: TX %#x RX %#x\n",
 		       nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_TX]),
 		       nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_RX]));

 	if (tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 		printf("\tSupported interface modes:\n");
 		nla_for_each_nested(nl_mode, tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES], rem_mode)
 			printf("\t\t * %s\n", iftype_name(nla_type(nl_mode)));
 	}

 	if (tb_msg[NL80211_ATTR_SOFTWARE_IFTYPES]) {
 		printf("\tsoftware interface modes (can always be added):\n");
 		nla_for_each_nested(nl_mode, tb_msg[NL80211_ATTR_SOFTWARE_IFTYPES], rem_mode)
 			printf("\t\t * %s\n", iftype_name(nla_type(nl_mode)));
 	}

 	if (tb_msg[NL80211_ATTR_INTERFACE_COMBINATIONS]) {
 		struct nlattr *nl_combi;
 		int rem_combi;
 		bool have_combinations = false;

 		nla_for_each_nested(nl_combi, tb_msg[NL80211_ATTR_INTERFACE_COMBINATIONS], rem_combi) {
 			static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
 				[NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
 				[NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
 				[NL80211_IFACE_COMB_STA_AP_BI_MATCH] = { .type = NLA_FLAG },
 				[NL80211_IFACE_COMB_NUM_CHANNELS] = { .type = NLA_U32 },
 			};
 			struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
 			static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
 				[NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
 				[NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
 			};
 			struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
 			struct nlattr *nl_limit;
 			int err, rem_limit;
 			bool comma = false;

 			if (!have_combinations) {
 				printf("\tvalid interface combinations:\n");
 				have_combinations = true;
 			}

 			printf("\t\t * ");

 			err = nla_parse_nested(tb_comb, MAX_NL80211_IFACE_COMB,
 					       nl_combi, iface_combination_policy);
 			if (err || !tb_comb[NL80211_IFACE_COMB_LIMITS] ||
 			    !tb_comb[NL80211_IFACE_COMB_MAXNUM] ||
 			    !tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS]) {
 				printf(" <failed to parse>\n");
 				goto broken_combination;
 			}

 			nla_for_each_nested(nl_limit, tb_comb[NL80211_IFACE_COMB_LIMITS], rem_limit) {
 				bool ift_comma = false;

 				err = nla_parse_nested(tb_limit, MAX_NL80211_IFACE_LIMIT,
 						       nl_limit, iface_limit_policy);
 				if (err || !tb_limit[NL80211_IFACE_LIMIT_TYPES]) {
 					printf("<failed to parse>\n");
 					goto broken_combination;
 				}

 				if (comma)
 					printf(", ");
 				comma = true;
 				printf("#{");

 				nla_for_each_nested(nl_mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], rem_mode) {
 					printf("%s %s", ift_comma ? "," : "",
 						iftype_name(nla_type(nl_mode)));
 					ift_comma = true;
 				}
 				printf(" } <= %u", nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]));
 			}
 			printf(",\n\t\t   ");

 			printf("total <= %d, #channels <= %d%s\n",
 				nla_get_u32(tb_comb[NL80211_IFACE_COMB_MAXNUM]),
 				nla_get_u32(tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS]),
 				tb_comb[NL80211_IFACE_COMB_STA_AP_BI_MATCH] ?
 					", STA/AP BI must match" : "");
 broken_combination:
 			;
 		}

 		if (!have_combinations)
 			printf("\tinterface combinations are not supported\n");
 	}

 	if (tb_msg[NL80211_ATTR_SUPPORTED_COMMANDS]) {
 		printf("\tSupported commands:\n");
 		nla_for_each_nested(nl_cmd, tb_msg[NL80211_ATTR_SUPPORTED_COMMANDS], rem_cmd)
 			printf("\t\t * %s\n", command_name(nla_get_u32(nl_cmd)));
 	}

 	if (tb_msg[NL80211_ATTR_TX_FRAME_TYPES]) {
 		printf("\tSupported TX frame types:\n");
 		nla_for_each_nested(nl_if, tb_msg[NL80211_ATTR_TX_FRAME_TYPES], rem_if) {
 			bool printed = false;
 			nla_for_each_nested(nl_ftype, nl_if, rem_ftype) {
 				if (!printed)
 					printf("\t\t * %s:", iftype_name(nla_type(nl_if)));
 				printed = true;
 				printf(" 0x%.4x", nla_get_u16(nl_ftype));
 			}
 			if (printed)
 				printf("\n");
 		}
 	}

 	if (tb_msg[NL80211_ATTR_RX_FRAME_TYPES]) {
 		printf("\tSupported RX frame types:\n");
 		nla_for_each_nested(nl_if, tb_msg[NL80211_ATTR_RX_FRAME_TYPES], rem_if) {
 			bool printed = false;
 			nla_for_each_nested(nl_ftype, nl_if, rem_ftype) {
 				if (!printed)
 					printf("\t\t * %s:", iftype_name(nla_type(nl_if)));
 				printed = true;
 				printf(" 0x%.4x", nla_get_u16(nl_ftype));
 			}
 			if (printed)
 				printf("\n");
 		}
 	}

 	if (tb_msg[NL80211_ATTR_SUPPORT_IBSS_RSN])
 		printf("\tDevice supports RSN-IBSS.\n");

 	if (tb_msg[NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED]) {
 		struct nlattr *tb_wowlan[NUM_NL80211_WOWLAN_TRIG];
 		static struct nla_policy wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 			[NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 			[NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 			[NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 			[NL80211_WOWLAN_TRIG_PKT_PATTERN] = {
 				.minlen = sizeof(struct nl80211_wowlan_pattern_support),
 			},
 			[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED] = { .type = NLA_FLAG },
 			[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 			[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 			[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 			[NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 		};
 		struct nl80211_wowlan_pattern_support *pat;
 		int err;

 		err = nla_parse_nested(tb_wowlan, MAX_NL80211_WOWLAN_TRIG,
 				       tb_msg[NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED],
 				       wowlan_policy);
 		printf("\tWoWLAN support:");
 		if (err) {
 			printf(" <failed to parse>\n");
 		} else {
 			printf("\n");
 			if (tb_wowlan[NL80211_WOWLAN_TRIG_ANY])
 				printf("\t\t * wake up on anything (device continues operating normally)\n");
 			if (tb_wowlan[NL80211_WOWLAN_TRIG_DISCONNECT])
 				printf("\t\t * wake up on disconnect\n");
 			if (tb_wowlan[NL80211_WOWLAN_TRIG_MAGIC_PKT])
 				printf("\t\t * wake up on magic packet\n");
 			if (tb_wowlan[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
 				pat = nla_data(tb_wowlan[NL80211_WOWLAN_TRIG_PKT_PATTERN]);
 				printf("\t\t * wake up on pattern match, up to %u patterns of %u-%u bytes\n",
 					pat->max_patterns, pat->min_pattern_len, pat->max_pattern_len);
 			}
 			if (tb_wowlan[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
 				printf("\t\t * can do GTK rekeying\n");
 			if (tb_wowlan[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE])
 				printf("\t\t * wake up on GTK rekey failure\n");
 			if (tb_wowlan[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST])
 				printf("\t\t * wake up on EAP identity request\n");
 			if (tb_wowlan[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE])
 				printf("\t\t * wake up on 4-way handshake\n");
 			if (tb_wowlan[NL80211_WOWLAN_TRIG_RFKILL_RELEASE])
 				printf("\t\t * wake up on rfkill release\n");
 		}
 	}

 	if (tb_msg[NL80211_ATTR_ROAM_SUPPORT])
 		printf("\tDevice supports roaming.\n");

 	if (tb_msg[NL80211_ATTR_SUPPORT_AP_UAPSD])
 		printf("\tDevice supports AP-side u-APSD.\n");

 	return NL_SKIP;
 }

 static int handle_info(struct nl80211_state *state,
 		       struct nl_cb *cb,
 		       struct nl_msg *msg,
 		       int argc, char **argv)
 {
 	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_phy_handler, NULL);

 	return 0;
 }
 __COMMAND(NULL, info, "info", NULL, NL80211_CMD_GET_WIPHY, 0, 0, CIB_PHY, handle_info,
 	 "Show capabilities for the specified wireless device.", NULL);
 TOPLEVEL(list, NULL, NL80211_CMD_GET_WIPHY, NLM_F_DUMP, CIB_NONE, handle_info,
 	 "List all wireless devices and their capabilities.");
 TOPLEVEL(phy, NULL, NL80211_CMD_GET_WIPHY, NLM_F_DUMP, CIB_NONE, handle_info, NULL);
	#include <stdbool.h>
	#include <errno.h>
	#include <net/if.h>

	#include <netlink/genl/genl.h>
	#include <netlink/genl/family.h>
	#include <netlink/genl/ctrl.h>
	#include <netlink/msg.h>
	#include <netlink/attr.h>

	#include "nl80211.h"
	#include "iw.h"

	static void print_flag(const char name, int open)
	{
	if (!*open)
	printf(" (");
	else
	printf(", ");
	printf("%s", name);
	*open = 1;
	}

	static char *cipher_name(__u32 c)
	{
	static char buf[20];

	switch (c) {
	case 0x000fac01:
	return "WEP40 (00-0f-ac:1)";
	case 0x000fac05:
	return "WEP104 (00-0f-ac:5)";
	case 0x000fac02:
	return "TKIP (00-0f-ac:2)";
	case 0x000fac04:
	return "CCMP (00-0f-ac:4)";
	case 0x000fac06:
	return "CMAC (00-0f-ac:6)";
	case 0x00147201:
	return "WPI-SMS4 (00-14-72:1)";
	default:
	sprintf(buf, "%.2x-%.2x-%.2x:%d",
	c >> 24, (c >> 16) & 0xff,
	(c >> 8) & 0xff, c & 0xff);

	return buf;
	}
	}

	static int print_phy_handler(struct nl_msg msg, void arg)
	{
	struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));

	struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];

	struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
	static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
	[NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
	[NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
	[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
	[NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
	[NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
	[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
	};

	struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
	static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
	[NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
	[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
	};

	struct nlattr *nl_band;
	struct nlattr *nl_freq;
	struct nlattr *nl_rate;
	struct nlattr *nl_mode;
	struct nlattr *nl_cmd;
	struct nlattr nl_if, nl_ftype;
	int bandidx = 1;
	int rem_band, rem_freq, rem_rate, rem_mode, rem_cmd, rem_ftype, rem_if;
	int open;

	nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
	genlmsg_attrlen(gnlh, 0), NULL);

	if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
	return NL_SKIP;

	if (tb_msg[NL80211_ATTR_WIPHY_NAME])
	printf("Wiphy %s\n", nla_get_string(tb_msg[NL80211_ATTR_WIPHY_NAME]));

	nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
	printf("\tBand %d:\n", bandidx);
	bandidx++;

	nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
	nla_len(nl_band), NULL);

	#ifdef NL80211_BAND_ATTR_HT_CAPA
	if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
	__u16 cap = nla_get_u16(tb_band[NL80211_BAND_ATTR_HT_CAPA]);
	print_ht_capability(cap);
	}
	if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
	__u8 exponent = nla_get_u8(tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]);
	print_ampdu_length(exponent);
	}
	if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
	__u8 spacing = nla_get_u8(tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]);
	print_ampdu_spacing(spacing);
	}
	if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
	nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]) == 16)
	print_ht_mcs(nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]));
	#endif

	printf("\t\tFrequencies:\n");

	nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
	uint32_t freq;
	nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
	nla_len(nl_freq), freq_policy);
	if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
	continue;
	freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
	printf("\t\t\t* %d MHz [%d]", freq, ieee80211_frequency_to_channel(freq));

	if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
	!tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
	printf(" (%.1f dBm)", 0.01 * nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));

	open = 0;
	if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED]) {
	print_flag("disabled", &open);
	goto next;
	}
	if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
	print_flag("passive scanning", &open);
	if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
	print_flag("no IBSS", &open);
	if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
	print_flag("radar detection", &open);
	next:
	if (open)
	printf(")");
	printf("\n");
	}

	printf("\t\tBitrates (non-HT):\n");

	nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
	nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
	nla_len(nl_rate), rate_policy);
	if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
	continue;
	printf("\t\t\t* %2.1f Mbps", 0.1 * nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]));
	open = 0;
	if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
	print_flag("short preamble supported", &open);
	if (open)
	printf(")");
	printf("\n");
	}
	}

	if (tb_msg[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
	printf("\tmax # scan SSIDs: %d\n",
	nla_get_u8(tb_msg[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]));
	if (tb_msg[NL80211_ATTR_MAX_SCAN_IE_LEN])
	printf("\tmax scan IEs length: %d bytes\n",
	nla_get_u16(tb_msg[NL80211_ATTR_MAX_SCAN_IE_LEN]));

	if (tb_msg[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
	unsigned int frag;

	frag = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
	if (frag != (unsigned int)-1)
	printf("\tFragmentation threshold: %d\n", frag);
	}

	if (tb_msg[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
	unsigned int rts;

	rts = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
	if (rts != (unsigned int)-1)
	printf("\tRTS threshold: %d\n", rts);
	}

	if (tb_msg[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
	unsigned char coverage;

	coverage = nla_get_u8(tb_msg[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
	/* See handle_distance() for an explanation where the '450' comes from */
	printf("\tCoverage class: %d (up to %dm)\n", coverage, 450 * coverage);
	}

	if (tb_msg[NL80211_ATTR_CIPHER_SUITES]) {
	int num = nla_len(tb_msg[NL80211_ATTR_CIPHER_SUITES]) / sizeof(__u32);
	int i;
	__u32 *ciphers = nla_data(tb_msg[NL80211_ATTR_CIPHER_SUITES]);
	if (num > 0) {
	printf("\tSupported Ciphers:\n");
	for (i = 0; i < num; i++)
	printf("\t\t* %s\n",
	cipher_name(ciphers[i]));
	}
	}

	if (tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX] &&
	tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX])
	printf("\tAvailable Antennas: TX %#x RX %#x\n",
	nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX]),
	nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX]));

	if (tb_msg[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
	tb_msg[NL80211_ATTR_WIPHY_ANTENNA_RX])
	printf("\tConfigured Antennas: TX %#x RX %#x\n",
	nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_TX]),
	nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_RX]));

	if (tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES]) {
	printf("\tSupported interface modes:\n");
	nla_for_each_nested(nl_mode, tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES], rem_mode)
	printf("\t\t * %s\n", iftype_name(nla_type(nl_mode)));
	}

	if (tb_msg[NL80211_ATTR_SOFTWARE_IFTYPES]) {
	printf("\tsoftware interface modes (can always be added):\n");
	nla_for_each_nested(nl_mode, tb_msg[NL80211_ATTR_SOFTWARE_IFTYPES], rem_mode)
	printf("\t\t * %s\n", iftype_name(nla_type(nl_mode)));
	}

	if (tb_msg[NL80211_ATTR_INTERFACE_COMBINATIONS]) {
	struct nlattr *nl_combi;
	int rem_combi;
	bool have_combinations = false;

	nla_for_each_nested(nl_combi, tb_msg[NL80211_ATTR_INTERFACE_COMBINATIONS], rem_combi) {
	static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
	[NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
	[NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
	[NL80211_IFACE_COMB_STA_AP_BI_MATCH] = { .type = NLA_FLAG },
	[NL80211_IFACE_COMB_NUM_CHANNELS] = { .type = NLA_U32 },
	};
	struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
	static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
	[NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
	[NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
	};
	struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
	struct nlattr *nl_limit;
	int err, rem_limit;
	bool comma = false;

	if (!have_combinations) {
	printf("\tvalid interface combinations:\n");
	have_combinations = true;
	}

	printf("\t\t * ");

	err = nla_parse_nested(tb_comb, MAX_NL80211_IFACE_COMB,
	nl_combi, iface_combination_policy);
	if (err \|\| !tb_comb[NL80211_IFACE_COMB_LIMITS] \|\|
	!tb_comb[NL80211_IFACE_COMB_MAXNUM] \|\|
	!tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS]) {
	printf(" <failed to parse>\n");
	goto broken_combination;
	}

	nla_for_each_nested(nl_limit, tb_comb[NL80211_IFACE_COMB_LIMITS], rem_limit) {
	bool ift_comma = false;

	err = nla_parse_nested(tb_limit, MAX_NL80211_IFACE_LIMIT,
	nl_limit, iface_limit_policy);
	if (err \|\| !tb_limit[NL80211_IFACE_LIMIT_TYPES]) {
	printf("<failed to parse>\n");
	goto broken_combination;
	}

	if (comma)
	printf(", ");
	comma = true;
	printf("#{");

	nla_for_each_nested(nl_mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], rem_mode) {
	printf("%s %s", ift_comma ? "," : "",
	iftype_name(nla_type(nl_mode)));
	ift_comma = true;
	}
	printf(" } <= %u", nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]));
	}
	printf(",\n\t\t ");

	printf("total <= %d, #channels <= %d%s\n",
	nla_get_u32(tb_comb[NL80211_IFACE_COMB_MAXNUM]),
	nla_get_u32(tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS]),
	tb_comb[NL80211_IFACE_COMB_STA_AP_BI_MATCH] ?
	", STA/AP BI must match" : "");
	broken_combination:
	;
	}

	if (!have_combinations)
	printf("\tinterface combinations are not supported\n");
	}

	if (tb_msg[NL80211_ATTR_SUPPORTED_COMMANDS]) {
	printf("\tSupported commands:\n");
	nla_for_each_nested(nl_cmd, tb_msg[NL80211_ATTR_SUPPORTED_COMMANDS], rem_cmd)
	printf("\t\t * %s\n", command_name(nla_get_u32(nl_cmd)));
	}

	if (tb_msg[NL80211_ATTR_TX_FRAME_TYPES]) {
	printf("\tSupported TX frame types:\n");
	nla_for_each_nested(nl_if, tb_msg[NL80211_ATTR_TX_FRAME_TYPES], rem_if) {
	bool printed = false;
	nla_for_each_nested(nl_ftype, nl_if, rem_ftype) {
	if (!printed)
	printf("\t\t * %s:", iftype_name(nla_type(nl_if)));
	printed = true;
	printf(" 0x%.4x", nla_get_u16(nl_ftype));
	}
	if (printed)
	printf("\n");
	}
	}

	if (tb_msg[NL80211_ATTR_RX_FRAME_TYPES]) {
	printf("\tSupported RX frame types:\n");
	nla_for_each_nested(nl_if, tb_msg[NL80211_ATTR_RX_FRAME_TYPES], rem_if) {
	bool printed = false;
	nla_for_each_nested(nl_ftype, nl_if, rem_ftype) {
	if (!printed)
	printf("\t\t * %s:", iftype_name(nla_type(nl_if)));
	printed = true;
	printf(" 0x%.4x", nla_get_u16(nl_ftype));
	}
	if (printed)
	printf("\n");
	}
	}

	if (tb_msg[NL80211_ATTR_SUPPORT_IBSS_RSN])
	printf("\tDevice supports RSN-IBSS.\n");

	if (tb_msg[NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED]) {
	struct nlattr *tb_wowlan[NUM_NL80211_WOWLAN_TRIG];
	static struct nla_policy wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
	[NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_PKT_PATTERN] = {
	.minlen = sizeof(struct nl80211_wowlan_pattern_support),
	},
	[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
	};
	struct nl80211_wowlan_pattern_support *pat;
	int err;

	err = nla_parse_nested(tb_wowlan, MAX_NL80211_WOWLAN_TRIG,
	tb_msg[NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED],
	wowlan_policy);
	printf("\tWoWLAN support:");
	if (err) {
	printf(" <failed to parse>\n");
	} else {
	printf("\n");
	if (tb_wowlan[NL80211_WOWLAN_TRIG_ANY])
	printf("\t\t * wake up on anything (device continues operating normally)\n");
	if (tb_wowlan[NL80211_WOWLAN_TRIG_DISCONNECT])
	printf("\t\t * wake up on disconnect\n");
	if (tb_wowlan[NL80211_WOWLAN_TRIG_MAGIC_PKT])
	printf("\t\t * wake up on magic packet\n");
	if (tb_wowlan[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
	pat = nla_data(tb_wowlan[NL80211_WOWLAN_TRIG_PKT_PATTERN]);
	printf("\t\t * wake up on pattern match, up to %u patterns of %u-%u bytes\n",
	pat->max_patterns, pat->min_pattern_len, pat->max_pattern_len);
	}
	if (tb_wowlan[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
	printf("\t\t * can do GTK rekeying\n");
	if (tb_wowlan[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE])
	printf("\t\t * wake up on GTK rekey failure\n");
	if (tb_wowlan[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST])
	printf("\t\t * wake up on EAP identity request\n");
	if (tb_wowlan[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE])
	printf("\t\t * wake up on 4-way handshake\n");
	if (tb_wowlan[NL80211_WOWLAN_TRIG_RFKILL_RELEASE])
	printf("\t\t * wake up on rfkill release\n");
	}
	}

	if (tb_msg[NL80211_ATTR_ROAM_SUPPORT])
	printf("\tDevice supports roaming.\n");

	if (tb_msg[NL80211_ATTR_SUPPORT_AP_UAPSD])
	printf("\tDevice supports AP-side u-APSD.\n");

	return NL_SKIP;
	}

	static int handle_info(struct nl80211_state *state,
	struct nl_cb *cb,
	struct nl_msg *msg,
	int argc, char **argv)
	{
	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_phy_handler, NULL);

	return 0;
	}
	__COMMAND(NULL, info, "info", NULL, NL80211_CMD_GET_WIPHY, 0, 0, CIB_PHY, handle_info,
	"Show capabilities for the specified wireless device.", NULL);
	TOPLEVEL(list, NULL, NL80211_CMD_GET_WIPHY, NLM_F_DUMP, CIB_NONE, handle_info,
	"List all wireless devices and their capabilities.");
	TOPLEVEL(phy, NULL, NL80211_CMD_GET_WIPHY, NLM_F_DUMP, CIB_NONE, handle_info, NULL);