[thirdparty/iw.git] / bitrate.c

#include <errno.h>

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


static int parse_vht_chunk(const char *arg, __u8 *nss, __u16 *mcs)
{
	int count, i;
	unsigned int inss, mcs_start, mcs_end, tab[10];

	*nss = 0; *mcs = 0;

	if (strchr(arg, '-')) {
		/* Format: NSS:MCS_START-MCS_END */
		count = sscanf(arg, "%u:%u-%u", &inss, &mcs_start, &mcs_end);

		if (count != 3)
			return 0;

		if (inss < 1 || inss > NL80211_VHT_NSS_MAX)
			return 0;

		if (mcs_start > mcs_end)
			return 0;

		if (mcs_start > 9 || mcs_end > 9)
			return 0;

		*nss = inss;
		for (i = mcs_start; i <= mcs_end; i++)
			*mcs |= 1 << i;

	} else {
		/* Format: NSS:MCSx,MCSy,... */
		count = sscanf(arg, "%u:%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", &inss,
			   &tab[0], &tab[1], &tab[2], &tab[3], &tab[4], &tab[5],
			   &tab[6], &tab[7], &tab[8], &tab[9]);

		if (count < 2)
			return 0;

		if (inss < 1 || inss > NL80211_VHT_NSS_MAX)
			return 0;

		*nss = inss;
		for (i = 0; i < count - 1; i++) {
			if (tab[i] > 9)
				return 0;
			*mcs |= 1 << tab[i];
		}
	}

	return 1;
}

static int setup_vht(struct nl80211_txrate_vht *txrate_vht,
		     int argc, char **argv)
{
	__u8 nss;
	__u16 mcs;
	int i;

	memset(txrate_vht, 0, sizeof(*txrate_vht));

	for (i = 0; i < argc; i++) {
		if(!parse_vht_chunk(argv[i], &nss, &mcs))
			return 0;

		nss--;
		txrate_vht->mcs[nss] |= mcs;
	}

	return 1;
}

#define VHT_ARGC_MAX	100

static int handle_bitrates(struct nl80211_state *state,
			   struct nl_cb *cb,
			   struct nl_msg *msg,
			   int argc, char **argv,
			   enum id_input id)
{
	struct nlattr *nl_rates, *nl_band;
	int i;
	bool have_legacy_24 = false, have_legacy_5 = false;
	uint8_t legacy_24[32], legacy_5[32];
	int n_legacy_24 = 0, n_legacy_5 = 0;
	uint8_t *legacy = NULL;
	int *n_legacy = NULL;
	bool have_ht_mcs_24 = false, have_ht_mcs_5 = false;
	bool have_vht_mcs_24 = false, have_vht_mcs_5 = false;
	uint8_t ht_mcs_24[77], ht_mcs_5[77];
	int n_ht_mcs_24 = 0, n_ht_mcs_5 = 0;
	struct nl80211_txrate_vht txrate_vht_24 = {};
	struct nl80211_txrate_vht txrate_vht_5 = {};
	uint8_t *mcs = NULL;
	int *n_mcs = NULL;
	char *vht_argv_5[VHT_ARGC_MAX] = {}; char *vht_argv_24[VHT_ARGC_MAX] = {};
	char **vht_argv = NULL;
	int vht_argc_5 = 0; int vht_argc_24 = 0;
	int *vht_argc = NULL;

	enum {
		S_NONE,
		S_LEGACY,
		S_HT,
		S_VHT,
	} parser_state = S_NONE;

	for (i = 0; i < argc; i++) {
		char *end;
		double tmpd;
		long tmpl;

		if (strcmp(argv[i], "legacy-2.4") == 0) {
			if (have_legacy_24)
				return 1;
			parser_state = S_LEGACY;
			legacy = legacy_24;
			n_legacy = &n_legacy_24;
			have_legacy_24 = true;
		} else if (strcmp(argv[i], "legacy-5") == 0) {
			if (have_legacy_5)
				return 1;
			parser_state = S_LEGACY;
			legacy = legacy_5;
			n_legacy = &n_legacy_5;
			have_legacy_5 = true;
		}
		else if (strcmp(argv[i], "ht-mcs-2.4") == 0) {
			if (have_ht_mcs_24)
				return 1;
			parser_state = S_HT;
			mcs = ht_mcs_24;
			n_mcs = &n_ht_mcs_24;
			have_ht_mcs_24 = true;
		} else if (strcmp(argv[i], "ht-mcs-5") == 0) {
			if (have_ht_mcs_5)
				return 1;
			parser_state = S_HT;
			mcs = ht_mcs_5;
			n_mcs = &n_ht_mcs_5;
			have_ht_mcs_5 = true;
		} else if (strcmp(argv[i], "vht-mcs-2.4") == 0) {
			if (have_vht_mcs_24)
				return 1;
			parser_state = S_VHT;
			vht_argv = vht_argv_24;
			vht_argc = &vht_argc_24;
			have_vht_mcs_24 = true;
		} else if (strcmp(argv[i], "vht-mcs-5") == 0) {
			if (have_vht_mcs_5)
				return 1;
			parser_state = S_VHT;
			vht_argv = vht_argv_5;
			vht_argc = &vht_argc_5;
			have_vht_mcs_5 = true;
		}
		else switch (parser_state) {
		case S_LEGACY:
			tmpd = strtod(argv[i], &end);
			if (*end != '\0')
				return 1;
			if (tmpd < 1 || tmpd > 255 * 2)
				return 1;
			legacy[(*n_legacy)++] = tmpd * 2;
			break;
		case S_HT:
			tmpl = strtol(argv[i], &end, 0);
			if (*end != '\0')
				return 1;
			if (tmpl < 0 || tmpl > 255)
				return 1;
			mcs[(*n_mcs)++] = tmpl;
			break;
		case S_VHT:
			if (*vht_argc >= VHT_ARGC_MAX)
				return 1;
			vht_argv[(*vht_argc)++] = argv[i];
			break;
		default:
			return 1;
		}
	}

	if (have_vht_mcs_24)
		if(!setup_vht(&txrate_vht_24, vht_argc_24, vht_argv_24))
			return -EINVAL;

	if (have_vht_mcs_5)
		if(!setup_vht(&txrate_vht_5, vht_argc_5, vht_argv_5))
			return -EINVAL;

	nl_rates = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
	if (!nl_rates)
		goto nla_put_failure;

	if (have_legacy_24 || have_ht_mcs_24 || have_vht_mcs_24) {
		nl_band = nla_nest_start(msg, NL80211_BAND_2GHZ);
		if (!nl_band)
			goto nla_put_failure;
		if (have_legacy_24)
			nla_put(msg, NL80211_TXRATE_LEGACY, n_legacy_24, legacy_24);
		if (have_ht_mcs_24)
			nla_put(msg, NL80211_TXRATE_HT, n_ht_mcs_24, ht_mcs_24);
		if (have_vht_mcs_24)
			nla_put(msg, NL80211_TXRATE_VHT, sizeof(txrate_vht_24), &txrate_vht_24);
		nla_nest_end(msg, nl_band);
	}

	if (have_legacy_5 || have_ht_mcs_5 || have_vht_mcs_5) {
		nl_band = nla_nest_start(msg, NL80211_BAND_5GHZ);
		if (!nl_band)
			goto nla_put_failure;
		if (have_legacy_5)
			nla_put(msg, NL80211_TXRATE_LEGACY, n_legacy_5, legacy_5);
		if (have_ht_mcs_5)
			nla_put(msg, NL80211_TXRATE_HT, n_ht_mcs_5, ht_mcs_5);
		if (have_vht_mcs_5)
			nla_put(msg, NL80211_TXRATE_VHT, sizeof(txrate_vht_5), &txrate_vht_5);
		nla_nest_end(msg, nl_band);
	}

	nla_nest_end(msg, nl_rates);

	return 0;
 nla_put_failure:
	return -ENOBUFS;
}

#define DESCR_LEGACY "[legacy-<2.4|5> <legacy rate in Mbps>*]"
#define DESCR DESCR_LEGACY " [ht-mcs-<2.4|5> <MCS index>*] [vht-mcs-<2.4|5> <NSS:MCSx,MCSy... | NSS:MCSx-MCSy>*]"

COMMAND(set, bitrates, "[legacy-<2.4|5> <legacy rate in Mbps>*] [ht-mcs-<2.4|5> <MCS index>*] [vht-mcs-<2.4|5> <NSS:MCSx,MCSy... | NSS:MCSx-MCSy>*]",
	NL80211_CMD_SET_TX_BITRATE_MASK, 0, CIB_NETDEV, handle_bitrates,
	"Sets up the specified rate masks.\n"
	"Not passing any arguments would clear the existing mask (if any).");
Commit	Line	Data
942b5cd8 JB	1	#include <errno.h>
	2
	3	#include "nl80211.h"
	4	#include "iw.h"
	5
	6
118976b2 JD	7	static int parse_vht_chunk(const char arg, __u8 nss, __u16 *mcs)
	8	{
	9	int count, i;
	10	unsigned int inss, mcs_start, mcs_end, tab[10];
	11
	12	nss = 0; mcs = 0;
	13
	14	if (strchr(arg, '-')) {
	15	/* Format: NSS:MCS_START-MCS_END */
	16	count = sscanf(arg, "%u:%u-%u", &inss, &mcs_start, &mcs_end);
	17
	18	if (count != 3)
	19	return 0;
	20
	21	if (inss < 1 \|\| inss > NL80211_VHT_NSS_MAX)
	22	return 0;
	23
	24	if (mcs_start > mcs_end)
	25	return 0;
	26
	27	if (mcs_start > 9 \|\| mcs_end > 9)
	28	return 0;
	29
	30	*nss = inss;
	31	for (i = mcs_start; i <= mcs_end; i++)
	32	*mcs \|= 1 << i;
	33
	34	} else {
	35	/* Format: NSS:MCSx,MCSy,... */
	36	count = sscanf(arg, "%u:%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", &inss,
	37	&tab[0], &tab[1], &tab[2], &tab[3], &tab[4], &tab[5],
	38	&tab[6], &tab[7], &tab[8], &tab[9]);
	39
	40	if (count < 2)
	41	return 0;
	42
	43	if (inss < 1 \|\| inss > NL80211_VHT_NSS_MAX)
	44	return 0;
	45
	46	*nss = inss;
	47	for (i = 0; i < count - 1; i++) {
	48	if (tab[i] > 9)
	49	return 0;
	50	*mcs \|= 1 << tab[i];
	51	}
	52	}
	53
	54	return 1;
	55	}
	56
	57	static int setup_vht(struct nl80211_txrate_vht *txrate_vht,
	58	int argc, char **argv)
	59	{
	60	__u8 nss;
	61	__u16 mcs;
	62	int i;
	63
	64	memset(txrate_vht, 0, sizeof(*txrate_vht));
	65
	66	for (i = 0; i < argc; i++) {
	67	if(!parse_vht_chunk(argv[i], &nss, &mcs))
	68	return 0;
	69
	70	nss--;
71	txrate_vht->mcs[nss] \|= mcs;
72	}
73
74	return 1;
75	}
76
77	#define VHT_ARGC_MAX 100
78
942b5cd8 JB	79	static int handle_bitrates(struct nl80211_state *state,
	80	struct nl_cb *cb,
	81	struct nl_msg *msg,
05514f95 JB	82	int argc, char **argv,
05514f95 JB	83	enum id_input id)
942b5cd8 JB	84	{
	85	struct nlattr nl_rates, nl_band;
	86	int i;
	87	bool have_legacy_24 = false, have_legacy_5 = false;
	88	uint8_t legacy_24[32], legacy_5[32];
	89	int n_legacy_24 = 0, n_legacy_5 = 0;
	90	uint8_t *legacy = NULL;
	91	int *n_legacy = NULL;
118976b2 JD	92	bool have_ht_mcs_24 = false, have_ht_mcs_5 = false;
	93	bool have_vht_mcs_24 = false, have_vht_mcs_5 = false;
	94	uint8_t ht_mcs_24[77], ht_mcs_5[77];
	95	int n_ht_mcs_24 = 0, n_ht_mcs_5 = 0;
	96	struct nl80211_txrate_vht txrate_vht_24 = {};
	97	struct nl80211_txrate_vht txrate_vht_5 = {};
942b5cd8 JB	98	uint8_t *mcs = NULL;
942b5cd8 JB	99	int *n_mcs = NULL;
118976b2 JD	100	char vht_argv_5[VHT_ARGC_MAX] = {}; char vht_argv_24[VHT_ARGC_MAX] = {};
	101	char **vht_argv = NULL;
	102	int vht_argc_5 = 0; int vht_argc_24 = 0;
	103	int *vht_argc = NULL;
	104
942b5cd8 JB	105	enum {
	106	S_NONE,
	107	S_LEGACY,
118976b2 JD	108	S_HT,
118976b2 JD	109	S_VHT,
942b5cd8 JB	110	} parser_state = S_NONE;
	111
	112	for (i = 0; i < argc; i++) {
	113	char *end;
bd0f464b	114	double tmpd;
942b5cd8	115	long tmpl;
942b5cd8 JB	116
	117	if (strcmp(argv[i], "legacy-2.4") == 0) {
	118	if (have_legacy_24)
	119	return 1;
	120	parser_state = S_LEGACY;
	121	legacy = legacy_24;
	122	n_legacy = &n_legacy_24;
	123	have_legacy_24 = true;
	124	} else if (strcmp(argv[i], "legacy-5") == 0) {
	125	if (have_legacy_5)
	126	return 1;
	127	parser_state = S_LEGACY;
	128	legacy = legacy_5;
	129	n_legacy = &n_legacy_5;
	130	have_legacy_5 = true;
	131	}
118976b2 JD	132	else if (strcmp(argv[i], "ht-mcs-2.4") == 0) {
	133	if (have_ht_mcs_24)
	134	return 1;
	135	parser_state = S_HT;
	136	mcs = ht_mcs_24;
	137	n_mcs = &n_ht_mcs_24;
	138	have_ht_mcs_24 = true;
	139	} else if (strcmp(argv[i], "ht-mcs-5") == 0) {
	140	if (have_ht_mcs_5)
	141	return 1;
	142	parser_state = S_HT;
	143	mcs = ht_mcs_5;
	144	n_mcs = &n_ht_mcs_5;
	145	have_ht_mcs_5 = true;
	146	} else if (strcmp(argv[i], "vht-mcs-2.4") == 0) {
	147	if (have_vht_mcs_24)
942b5cd8	148	return 1;
118976b2 JD	149	parser_state = S_VHT;
	150	vht_argv = vht_argv_24;
	151	vht_argc = &vht_argc_24;
	152	have_vht_mcs_24 = true;
	153	} else if (strcmp(argv[i], "vht-mcs-5") == 0) {
	154	if (have_vht_mcs_5)
942b5cd8	155	return 1;
118976b2 JD	156	parser_state = S_VHT;
	157	vht_argv = vht_argv_5;
	158	vht_argc = &vht_argc_5;
	159	have_vht_mcs_5 = true;
942b5cd8	160	}
942b5cd8 JB	161	else switch (parser_state) {
942b5cd8 JB	162	case S_LEGACY:
bd0f464b	163	tmpd = strtod(argv[i], &end);
942b5cd8 JB	164	if (*end != '\0')
942b5cd8 JB	165	return 1;
bd0f464b	166	if (tmpd < 1 \|\| tmpd > 255 * 2)
942b5cd8	167	return 1;
bd0f464b	168	legacy[(n_legacy)++] = tmpd 2;
942b5cd8	169	break;
118976b2	170	case S_HT:
942b5cd8 JB	171	tmpl = strtol(argv[i], &end, 0);
	172	if (*end != '\0')
	173	return 1;
	174	if (tmpl < 0 \|\| tmpl > 255)
	175	return 1;
	176	mcs[(*n_mcs)++] = tmpl;
	177	break;
118976b2 JD	178	case S_VHT:
	179	if (*vht_argc >= VHT_ARGC_MAX)
	180	return 1;
	181	vht_argv[(*vht_argc)++] = argv[i];
	182	break;
942b5cd8 JB	183	default:
	184	return 1;
	185	}
	186	}
	187
118976b2 JD	188	if (have_vht_mcs_24)
	189	if(!setup_vht(&txrate_vht_24, vht_argc_24, vht_argv_24))
	190	return -EINVAL;
	191
	192	if (have_vht_mcs_5)
	193	if(!setup_vht(&txrate_vht_5, vht_argc_5, vht_argv_5))
	194	return -EINVAL;
	195
942b5cd8 JB	196	nl_rates = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
	197	if (!nl_rates)
	198	goto nla_put_failure;
	199
118976b2	200	if (have_legacy_24 \|\| have_ht_mcs_24 \|\| have_vht_mcs_24) {
942b5cd8 JB	201	nl_band = nla_nest_start(msg, NL80211_BAND_2GHZ);
	202	if (!nl_band)
	203	goto nla_put_failure;
	204	if (have_legacy_24)
	205	nla_put(msg, NL80211_TXRATE_LEGACY, n_legacy_24, legacy_24);
118976b2 JD	206	if (have_ht_mcs_24)
	207	nla_put(msg, NL80211_TXRATE_HT, n_ht_mcs_24, ht_mcs_24);
	208	if (have_vht_mcs_24)
	209	nla_put(msg, NL80211_TXRATE_VHT, sizeof(txrate_vht_24), &txrate_vht_24);
942b5cd8 JB	210	nla_nest_end(msg, nl_band);
	211	}
	212
118976b2	213	if (have_legacy_5 \|\| have_ht_mcs_5 \|\| have_vht_mcs_5) {
942b5cd8 JB	214	nl_band = nla_nest_start(msg, NL80211_BAND_5GHZ);
	215	if (!nl_band)
	216	goto nla_put_failure;
	217	if (have_legacy_5)
	218	nla_put(msg, NL80211_TXRATE_LEGACY, n_legacy_5, legacy_5);
118976b2 JD	219	if (have_ht_mcs_5)
	220	nla_put(msg, NL80211_TXRATE_HT, n_ht_mcs_5, ht_mcs_5);
	221	if (have_vht_mcs_5)
	222	nla_put(msg, NL80211_TXRATE_VHT, sizeof(txrate_vht_5), &txrate_vht_5);
942b5cd8 JB	223	nla_nest_end(msg, nl_band);
	224	}
	225
	226	nla_nest_end(msg, nl_rates);
	227
	228	return 0;
	229	nla_put_failure:
	230	return -ENOBUFS;
	231	}
	232
	233	#define DESCR_LEGACY "[legacy-<2.4\|5> <legacy rate in Mbps>*]"
118976b2	234	#define DESCR DESCR_LEGACY " [ht-mcs-<2.4\|5> <MCS index>] [vht-mcs-<2.4\|5> <NSS:MCSx,MCSy... \| NSS:MCSx-MCSy>]"
942b5cd8	235
118976b2	236	COMMAND(set, bitrates, "[legacy-<2.4\|5> <legacy rate in Mbps>] [ht-mcs-<2.4\|5> <MCS index>] [vht-mcs-<2.4\|5> <NSS:MCSx,MCSy... \| NSS:MCSx-MCSy>*]",
135e65d6	237	NL80211_CMD_SET_TX_BITRATE_MASK, 0, CIB_NETDEV, handle_bitrates,
dce7b720 SM	238	"Sets up the specified rate masks.\n"
dce7b720 SM	239	"Not passing any arguments would clear the existing mask (if any).");