Add generic operating class and channel to frequency function
ieee80211_chan_to_freq() is a generic function that replaces and extends the previous P2P-specific p2p_channel_to_freq(). The new function supports both the global operating class table as well as the additional US, EU, JP, and CN operating class tables. Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen
parent
73360424d9
commit
533630625d
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@ -537,6 +537,286 @@ enum hostapd_hw_mode ieee80211_freq_to_chan(int freq, u8 *channel)
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}
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static const char *us_op_class_cc[] = {
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"US", "CA", NULL
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};
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static const char *eu_op_class_cc[] = {
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"AL", "AM", "AT", "AZ", "BA", "BE", "BG", "BY", "CH", "CY", "CZ", "DE",
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"DK", "EE", "EL", "ES", "FI", "FR", "GE", "HR", "HU", "IE", "IS", "IT",
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"LI", "LT", "LU", "LV", "MD", "ME", "MK", "MT", "NL", "NO", "PL", "PT",
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"RO", "RS", "RU", "SE", "SI", "SK", "TR", "UA", "UK", NULL
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};
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static const char *jp_op_class_cc[] = {
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"JP", NULL
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};
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static const char *cn_op_class_cc[] = {
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"CN", "CA", NULL
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};
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static int country_match(const char *cc[], const char *country)
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{
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int i;
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if (country == NULL)
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return 0;
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for (i = 0; cc[i]; i++) {
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if (cc[i][0] == country[0] && cc[i][1] == country[1])
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return 1;
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}
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return 0;
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}
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static int ieee80211_chan_to_freq_us(u8 op_class, u8 chan)
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{
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switch (op_class) {
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case 12: /* channels 1..11 */
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case 32: /* channels 1..7; 40 MHz */
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case 33: /* channels 5..11; 40 MHz */
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if (chan < 1 || chan > 11)
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return -1;
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return 2407 + 5 * chan;
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case 1: /* channels 36,40,44,48 */
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case 2: /* channels 52,56,60,64; dfs */
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case 22: /* channels 36,44; 40 MHz */
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case 23: /* channels 52,60; 40 MHz */
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case 27: /* channels 40,48; 40 MHz */
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case 28: /* channels 56,64; 40 MHz */
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if (chan < 36 || chan > 64)
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return -1;
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return 5000 + 5 * chan;
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case 4: /* channels 100-144 */
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case 24: /* channels 100-140; 40 MHz */
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if (chan < 100 || chan > 144)
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return -1;
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return 5000 + 5 * chan;
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case 3: /* channels 149,153,157,161 */
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case 25: /* channels 149,157; 40 MHz */
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case 26: /* channels 149,157; 40 MHz */
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case 30: /* channels 153,161; 40 MHz */
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case 31: /* channels 153,161; 40 MHz */
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if (chan < 149 || chan > 161)
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return -1;
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return 5000 + 5 * chan;
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case 34: /* 60 GHz band, channels 1..3 */
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if (chan < 1 || chan > 3)
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return -1;
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return 56160 + 2160 * chan;
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}
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return -1;
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}
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static int ieee80211_chan_to_freq_eu(u8 op_class, u8 chan)
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{
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switch (op_class) {
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case 4: /* channels 1..13 */
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case 11: /* channels 1..9; 40 MHz */
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case 12: /* channels 5..13; 40 MHz */
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if (chan < 1 || chan > 13)
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return -1;
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return 2407 + 5 * chan;
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case 1: /* channels 36,40,44,48 */
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case 2: /* channels 52,56,60,64; dfs */
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case 5: /* channels 36,44; 40 MHz */
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case 6: /* channels 52,60; 40 MHz */
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case 8: /* channels 40,48; 40 MHz */
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case 9: /* channels 56,64; 40 MHz */
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if (chan < 36 || chan > 64)
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return -1;
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return 5000 + 5 * chan;
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case 3: /* channels 100-140 */
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case 7: /* channels 100-132; 40 MHz */
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case 10: /* channels 104-136; 40 MHz */
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case 16: /* channels 100-140 */
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if (chan < 100 || chan > 140)
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return -1;
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return 5000 + 5 * chan;
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case 17: /* channels 149,153,157,161,165,169 */
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if (chan < 149 || chan > 169)
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return -1;
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return 5000 + 5 * chan;
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case 18: /* 60 GHz band, channels 1..4 */
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if (chan < 1 || chan > 4)
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return -1;
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return 56160 + 2160 * chan;
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}
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return -1;
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}
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static int ieee80211_chan_to_freq_jp(u8 op_class, u8 chan)
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{
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switch (op_class) {
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case 30: /* channels 1..13 */
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case 56: /* channels 1..9; 40 MHz */
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case 57: /* channels 5..13; 40 MHz */
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if (chan < 1 || chan > 13)
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return -1;
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return 2407 + 5 * chan;
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case 31: /* channel 14 */
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if (chan != 14)
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return -1;
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return 2414 + 5 * chan;
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case 1: /* channels 34,38,42,46(old) or 36,40,44,48 */
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case 32: /* channels 52,56,60,64 */
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case 33: /* channels 52,56,60,64 */
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case 36: /* channels 36,44; 40 MHz */
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case 37: /* channels 52,60; 40 MHz */
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case 38: /* channels 52,60; 40 MHz */
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case 41: /* channels 40,48; 40 MHz */
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case 42: /* channels 56,64; 40 MHz */
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case 43: /* channels 56,64; 40 MHz */
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if (chan < 34 || chan > 64)
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return -1;
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return 5000 + 5 * chan;
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case 34: /* channels 100-140 */
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case 35: /* channels 100-140 */
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case 39: /* channels 100-132; 40 MHz */
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case 40: /* channels 100-132; 40 MHz */
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case 44: /* channels 104-136; 40 MHz */
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case 45: /* channels 104-136; 40 MHz */
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case 58: /* channels 100-140 */
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if (chan < 100 || chan > 140)
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return -1;
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return 5000 + 5 * chan;
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case 59: /* 60 GHz band, channels 1..4 */
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if (chan < 1 || chan > 3)
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return -1;
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return 56160 + 2160 * chan;
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}
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return -1;
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}
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static int ieee80211_chan_to_freq_cn(u8 op_class, u8 chan)
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{
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switch (op_class) {
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case 7: /* channels 1..13 */
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case 8: /* channels 1..9; 40 MHz */
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case 9: /* channels 5..13; 40 MHz */
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if (chan < 1 || chan > 13)
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return -1;
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return 2407 + 5 * chan;
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case 1: /* channels 36,40,44,48 */
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case 2: /* channels 52,56,60,64; dfs */
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case 4: /* channels 36,44; 40 MHz */
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case 5: /* channels 52,60; 40 MHz */
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if (chan < 36 || chan > 64)
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return -1;
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return 5000 + 5 * chan;
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case 3: /* channels 149,153,157,161,165 */
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case 6: /* channels 149,157; 40 MHz */
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if (chan < 149 || chan > 165)
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return -1;
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return 5000 + 5 * chan;
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}
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return -1;
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}
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static int ieee80211_chan_to_freq_global(u8 op_class, u8 chan)
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{
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/* Table E-4 in IEEE Std 802.11-2012 - Global operating classes */
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switch (op_class) {
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case 81:
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/* channels 1..13 */
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if (chan < 1 || chan > 13)
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return -1;
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return 2407 + 5 * chan;
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case 82:
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/* channel 14 */
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if (chan != 14)
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return -1;
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return 2414 + 5 * chan;
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case 83: /* channels 1..9; 40 MHz */
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case 84: /* channels 5..13; 40 MHz */
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if (chan < 1 || chan > 13)
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return -1;
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return 2407 + 5 * chan;
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case 115: /* channels 36,40,44,48; indoor only */
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case 116: /* channels 36,44; 40 MHz; indoor only */
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case 117: /* channels 40,48; 40 MHz; indoor only */
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case 118: /* channels 52,56,60,64; dfs */
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case 119: /* channels 52,60; 40 MHz; dfs */
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case 120: /* channels 56,64; 40 MHz; dfs */
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if (chan < 36 || chan > 64)
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return -1;
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return 5000 + 5 * chan;
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case 121: /* channels 100-140 */
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case 122: /* channels 100-142; 40 MHz */
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case 123: /* channels 104-136; 40 MHz */
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if (chan < 100 || chan > 140)
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return -1;
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return 5000 + 5 * chan;
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case 124: /* channels 149,153,157,161 */
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case 125: /* channels 149,153,157,161,165,169 */
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case 126: /* channels 149,157; 40 MHz */
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case 127: /* channels 153,161; 40 MHz */
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if (chan < 149 || chan > 161)
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return -1;
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return 5000 + 5 * chan;
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case 128: /* center freqs 42, 58, 106, 122, 138, 155; 80 MHz */
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case 130: /* center freqs 42, 58, 106, 122, 138, 155; 80 MHz */
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if (chan < 36 || chan > 161)
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return -1;
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return 5000 + 5 * chan;
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case 129: /* center freqs 50, 114; 160 MHz */
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if (chan < 50 || chan > 114)
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return -1;
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return 5000 + 5 * chan;
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case 180: /* 60 GHz band, channels 1..4 */
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if (chan < 1 || chan > 4)
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return -1;
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return 56160 + 2160 * chan;
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}
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return -1;
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}
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/**
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* ieee80211_chan_to_freq - Convert channel info to frequency
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* @country: Country code, if known; otherwise, global operating class is used
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* @op_class: Operating class
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* @chan: Channel number
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* Returns: Frequency in MHz or -1 if the specified channel is unknown
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*/
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int ieee80211_chan_to_freq(const char *country, u8 op_class, u8 chan)
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{
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int freq;
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if (country_match(us_op_class_cc, country)) {
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freq = ieee80211_chan_to_freq_us(op_class, chan);
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if (freq > 0)
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return freq;
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}
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if (country_match(eu_op_class_cc, country)) {
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freq = ieee80211_chan_to_freq_eu(op_class, chan);
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if (freq > 0)
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return freq;
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}
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if (country_match(jp_op_class_cc, country)) {
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freq = ieee80211_chan_to_freq_jp(op_class, chan);
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if (freq > 0)
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return freq;
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}
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if (country_match(cn_op_class_cc, country)) {
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freq = ieee80211_chan_to_freq_cn(op_class, chan);
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if (freq > 0)
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return freq;
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}
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return ieee80211_chan_to_freq_global(op_class, chan);
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}
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static int is_11b(u8 rate)
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{
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return rate == 0x02 || rate == 0x04 || rate == 0x0b || rate == 0x16;
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@ -105,6 +105,7 @@ struct hostapd_wmm_ac_params {
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int hostapd_config_wmm_ac(struct hostapd_wmm_ac_params wmm_ac_params[],
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const char *name, const char *val);
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enum hostapd_hw_mode ieee80211_freq_to_chan(int freq, u8 *channel);
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int ieee80211_chan_to_freq(const char *country, u8 op_class, u8 chan);
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int supp_rates_11b_only(struct ieee802_11_elems *elems);
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@ -9,6 +9,7 @@
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#include "includes.h"
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#include "common.h"
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#include "common/ieee802_11_common.h"
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#include "p2p_i.h"
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@ -54,56 +55,7 @@ int p2p_random(char *buf, size_t len)
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*/
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int p2p_channel_to_freq(int op_class, int channel)
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{
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/* Table E-4 in IEEE Std 802.11-2012 - Global operating classes */
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/* TODO: more operating classes */
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switch (op_class) {
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case 81:
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/* channels 1..13 */
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if (channel < 1 || channel > 13)
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return -1;
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return 2407 + 5 * channel;
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case 82:
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/* channel 14 */
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if (channel != 14)
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return -1;
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return 2414 + 5 * channel;
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case 83: /* channels 1..9; 40 MHz */
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case 84: /* channels 5..13; 40 MHz */
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if (channel < 1 || channel > 13)
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return -1;
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return 2407 + 5 * channel;
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case 115: /* channels 36,40,44,48; indoor only */
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case 118: /* channels 52,56,60,64; dfs */
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if (channel < 36 || channel > 64)
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return -1;
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return 5000 + 5 * channel;
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case 124: /* channels 149,153,157,161 */
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case 125: /* channels 149,153,157,161,165,169 */
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if (channel < 149 || channel > 161)
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return -1;
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return 5000 + 5 * channel;
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case 116: /* channels 36,44; 40 MHz; indoor only */
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case 117: /* channels 40,48; 40 MHz; indoor only */
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case 119: /* channels 52,60; 40 MHz; dfs */
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case 120: /* channels 56,64; 40 MHz; dfs */
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if (channel < 36 || channel > 64)
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return -1;
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return 5000 + 5 * channel;
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case 126: /* channels 149,157; 40 MHz */
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case 127: /* channels 153,161; 40 MHz */
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if (channel < 149 || channel > 161)
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return -1;
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return 5000 + 5 * channel;
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case 128: /* center freqs 42, 58, 106, 122, 138, 155; 80 MHz */
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if (channel < 36 || channel > 161)
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return -1;
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return 5000 + 5 * channel;
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case 180: /* 60 GHz band, channels 1..4 */
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if (channel < 1 || channel > 4)
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return -1;
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return 56160 + 2160 * channel;
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}
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return -1;
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return ieee80211_chan_to_freq(NULL, op_class, channel);
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}
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