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bitrate.c
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bitrate.c
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#include <errno.h>
#include "nl80211.h"
#include "iw.h"
static int parse_vht_chunk(const char *arg, __u8 *nss, __u16 *mcs)
{
unsigned 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_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;
int sgi_24 = 0, sgi_5 = 0, lgi_24 = 0, lgi_5 = 0;
enum {
S_NONE,
S_LEGACY,
S_HT,
S_VHT,
S_GI,
} 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 if (strcmp(argv[i], "sgi-2.4") == 0) {
sgi_24 = 1;
parser_state = S_GI;
} else if (strcmp(argv[i], "sgi-5") == 0) {
sgi_5 = 1;
parser_state = S_GI;
} else if (strcmp(argv[i], "lgi-2.4") == 0) {
lgi_24 = 1;
parser_state = S_GI;
} else if (strcmp(argv[i], "lgi-5") == 0) {
lgi_5 = 1;
parser_state = S_GI;
} 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;
case S_GI:
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;
if (sgi_5 && lgi_5)
return 1;
if (sgi_24 && lgi_24)
return 1;
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 || sgi_24 || lgi_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);
if (sgi_24)
nla_put_u8(msg, NL80211_TXRATE_GI, NL80211_TXRATE_FORCE_SGI);
if (lgi_24)
nla_put_u8(msg, NL80211_TXRATE_GI, NL80211_TXRATE_FORCE_LGI);
nla_nest_end(msg, nl_band);
}
if (have_legacy_5 || have_ht_mcs_5 || have_vht_mcs_5 || sgi_5 || lgi_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);
if (sgi_5)
nla_put_u8(msg, NL80211_TXRATE_GI, NL80211_TXRATE_FORCE_SGI);
if (lgi_5)
nla_put_u8(msg, NL80211_TXRATE_GI, NL80211_TXRATE_FORCE_LGI);
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>*] [sgi-2.4|lgi-2.4] [sgi-5|lgi-5]"
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>*] [sgi-2.4|lgi-2.4] [sgi-5|lgi-5]",
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).");