1 #include <errno.h> 2 3 #include "nl80211.h" 4 #include "iw.h" 5 6 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 79 static int handle_bitrates(struct nl80211_state *state, 80 struct nl_cb *cb, 81 struct nl_msg *msg, 82 int argc, char **argv, 83 enum id_input id) 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; 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 = {}; 98 uint8_t *mcs = NULL; 99 int *n_mcs = NULL; 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 int sgi_24 = 0, sgi_5 = 0, lgi_24 = 0, lgi_5 = 0; 105 106 enum { 107 S_NONE, 108 S_LEGACY, 109 S_HT, 110 S_VHT, 111 S_GI, 112 } parser_state = S_NONE; 113 114 for (i = 0; i < argc; i++) { 115 char *end; 116 double tmpd; 117 long tmpl; 118 119 if (strcmp(argv[i], "legacy-2.4") == 0) { 120 if (have_legacy_24) 121 return 1; 122 parser_state = S_LEGACY; 123 legacy = legacy_24; 124 n_legacy = &n_legacy_24; 125 have_legacy_24 = true; 126 } else if (strcmp(argv[i], "legacy-5") == 0) { 127 if (have_legacy_5) 128 return 1; 129 parser_state = S_LEGACY; 130 legacy = legacy_5; 131 n_legacy = &n_legacy_5; 132 have_legacy_5 = true; 133 } 134 else if (strcmp(argv[i], "ht-mcs-2.4") == 0) { 135 if (have_ht_mcs_24) 136 return 1; 137 parser_state = S_HT; 138 mcs = ht_mcs_24; 139 n_mcs = &n_ht_mcs_24; 140 have_ht_mcs_24 = true; 141 } else if (strcmp(argv[i], "ht-mcs-5") == 0) { 142 if (have_ht_mcs_5) 143 return 1; 144 parser_state = S_HT; 145 mcs = ht_mcs_5; 146 n_mcs = &n_ht_mcs_5; 147 have_ht_mcs_5 = true; 148 } else if (strcmp(argv[i], "vht-mcs-2.4") == 0) { 149 if (have_vht_mcs_24) 150 return 1; 151 parser_state = S_VHT; 152 vht_argv = vht_argv_24; 153 vht_argc = &vht_argc_24; 154 have_vht_mcs_24 = true; 155 } else if (strcmp(argv[i], "vht-mcs-5") == 0) { 156 if (have_vht_mcs_5) 157 return 1; 158 parser_state = S_VHT; 159 vht_argv = vht_argv_5; 160 vht_argc = &vht_argc_5; 161 have_vht_mcs_5 = true; 162 } else if (strcmp(argv[i], "sgi-2.4") == 0) { 163 sgi_24 = 1; 164 parser_state = S_GI; 165 } else if (strcmp(argv[i], "sgi-5") == 0) { 166 sgi_5 = 1; 167 parser_state = S_GI; 168 } else if (strcmp(argv[i], "lgi-2.4") == 0) { 169 lgi_24 = 1; 170 parser_state = S_GI; 171 } else if (strcmp(argv[i], "lgi-5") == 0) { 172 lgi_5 = 1; 173 parser_state = S_GI; 174 } else switch (parser_state) { 175 case S_LEGACY: 176 tmpd = strtod(argv[i], &end); 177 if (*end != '\0') 178 return 1; 179 if (tmpd < 1 || tmpd > 255 * 2) 180 return 1; 181 legacy[(*n_legacy)++] = tmpd * 2; 182 break; 183 case S_HT: 184 tmpl = strtol(argv[i], &end, 0); 185 if (*end != '\0') 186 return 1; 187 if (tmpl < 0 || tmpl > 255) 188 return 1; 189 mcs[(*n_mcs)++] = tmpl; 190 break; 191 case S_VHT: 192 if (*vht_argc >= VHT_ARGC_MAX) 193 return 1; 194 vht_argv[(*vht_argc)++] = argv[i]; 195 break; 196 case S_GI: 197 break; 198 default: 199 return 1; 200 } 201 } 202 203 if (have_vht_mcs_24) 204 if(!setup_vht(&txrate_vht_24, vht_argc_24, vht_argv_24)) 205 return -EINVAL; 206 207 if (have_vht_mcs_5) 208 if(!setup_vht(&txrate_vht_5, vht_argc_5, vht_argv_5)) 209 return -EINVAL; 210 211 if (sgi_5 && lgi_5) 212 return 1; 213 214 if (sgi_24 && lgi_24) 215 return 1; 216 217 nl_rates = nla_nest_start(msg, NL80211_ATTR_TX_RATES); 218 if (!nl_rates) 219 goto nla_put_failure; 220 221 if (have_legacy_24 || have_ht_mcs_24 || have_vht_mcs_24 || sgi_24 || lgi_24) { 222 nl_band = nla_nest_start(msg, NL80211_BAND_2GHZ); 223 if (!nl_band) 224 goto nla_put_failure; 225 if (have_legacy_24) 226 nla_put(msg, NL80211_TXRATE_LEGACY, n_legacy_24, legacy_24); 227 if (have_ht_mcs_24) 228 nla_put(msg, NL80211_TXRATE_HT, n_ht_mcs_24, ht_mcs_24); 229 if (have_vht_mcs_24) 230 nla_put(msg, NL80211_TXRATE_VHT, sizeof(txrate_vht_24), &txrate_vht_24); 231 if (sgi_24) 232 nla_put_u8(msg, NL80211_TXRATE_GI, NL80211_TXRATE_FORCE_SGI); 233 if (lgi_24) 234 nla_put_u8(msg, NL80211_TXRATE_GI, NL80211_TXRATE_FORCE_LGI); 235 nla_nest_end(msg, nl_band); 236 } 237 238 if (have_legacy_5 || have_ht_mcs_5 || have_vht_mcs_5 || sgi_5 || lgi_5) { 239 nl_band = nla_nest_start(msg, NL80211_BAND_5GHZ); 240 if (!nl_band) 241 goto nla_put_failure; 242 if (have_legacy_5) 243 nla_put(msg, NL80211_TXRATE_LEGACY, n_legacy_5, legacy_5); 244 if (have_ht_mcs_5) 245 nla_put(msg, NL80211_TXRATE_HT, n_ht_mcs_5, ht_mcs_5); 246 if (have_vht_mcs_5) 247 nla_put(msg, NL80211_TXRATE_VHT, sizeof(txrate_vht_5), &txrate_vht_5); 248 if (sgi_5) 249 nla_put_u8(msg, NL80211_TXRATE_GI, NL80211_TXRATE_FORCE_SGI); 250 if (lgi_5) 251 nla_put_u8(msg, NL80211_TXRATE_GI, NL80211_TXRATE_FORCE_LGI); 252 nla_nest_end(msg, nl_band); 253 } 254 255 nla_nest_end(msg, nl_rates); 256 257 return 0; 258 nla_put_failure: 259 return -ENOBUFS; 260 } 261 262 #define DESCR_LEGACY "[legacy-<2.4|5> <legacy rate in Mbps>*]" 263 #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]" 264 265 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]", 266 NL80211_CMD_SET_TX_BITRATE_MASK, 0, CIB_NETDEV, handle_bitrates, 267 "Sets up the specified rate masks.\n" 268 "Not passing any arguments would clear the existing mask (if any)."); 269
