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https://git.kernel.org/pub/scm/network/wireless/iwd.git
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band: move several scan utilities into band
This will allow unit testing modules which depend on these APIs: scan_channel_to_freq scan_freq_to_channel scan_oper_class_to_band
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parent
945710fae1
commit
f3c9b66f08
193
src/band.c
193
src/band.c
@ -923,3 +923,196 @@ int oci_from_chandef(const struct band_chandef *own, uint8_t oci[static 3])
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return -ENOENT;
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}
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uint8_t band_freq_to_channel(uint32_t freq, enum band_freq *out_band)
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{
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uint32_t channel = 0;
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if (freq >= 2412 && freq <= 2484) {
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if (freq == 2484)
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channel = 14;
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else {
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channel = freq - 2407;
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if (channel % 5)
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return 0;
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channel /= 5;
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}
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if (out_band)
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*out_band = BAND_FREQ_2_4_GHZ;
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return channel;
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}
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if (freq >= 5005 && freq < 5900) {
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if (freq % 5)
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return 0;
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channel = (freq - 5000) / 5;
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if (out_band)
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*out_band = BAND_FREQ_5_GHZ;
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return channel;
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}
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if (freq >= 4905 && freq < 5000) {
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if (freq % 5)
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return 0;
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channel = (freq - 4000) / 5;
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if (out_band)
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*out_band = BAND_FREQ_5_GHZ;
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return channel;
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}
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return 0;
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}
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uint32_t band_channel_to_freq(uint8_t channel, enum band_freq band)
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{
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if (band == BAND_FREQ_2_4_GHZ) {
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if (channel >= 1 && channel <= 13)
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return 2407 + 5 * channel;
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if (channel == 14)
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return 2484;
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}
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if (band == BAND_FREQ_5_GHZ) {
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if (channel >= 1 && channel <= 179)
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return 5000 + 5 * channel;
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if (channel >= 181 && channel <= 199)
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return 4000 + 5 * channel;
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}
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return 0;
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}
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static const char *const oper_class_us_codes[] = {
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"US", "CA"
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};
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static const char *const oper_class_eu_codes[] = {
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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"
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};
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/* Annex E, table E-1 */
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static const uint8_t oper_class_us_to_global[] = {
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[1] = 115, [2] = 118, [3] = 124, [4] = 121,
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[5] = 125, [6] = 103, [7] = 103, [8] = 102,
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[9] = 102, [10] = 101, [11] = 101, [12] = 81,
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[13] = 94, [14] = 95, [15] = 96, [22] = 116,
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[23] = 119, [24] = 122, [25] = 126, [26] = 126,
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[27] = 117, [28] = 120, [29] = 123, [30] = 127,
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[31] = 127, [32] = 83, [33] = 84, [34] = 180,
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/* 128 - 130 is a 1 to 1 mapping */
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};
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/* Annex E, table E-2 */
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static const uint8_t oper_class_eu_to_global[] = {
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[1] = 115, [2] = 118, [3] = 121, [4] = 81,
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[5] = 116, [6] = 119, [7] = 122, [8] = 117,
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[9] = 120, [10] = 123, [11] = 83, [12] = 84,
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[17] = 125, [18] = 130,
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/* 128 - 130 is a 1 to 1 mapping */
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};
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/* Annex E, table E-3 */
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static const uint8_t oper_class_jp_to_global[] = {
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[1] = 115, [2] = 112, [3] = 112, [4] = 112,
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[5] = 112, [6] = 112, [7] = 109, [8] = 109,
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[9] = 109, [10] = 109, [11] = 109, [12] = 113,
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[13] = 113, [14] = 113, [15] = 113, [16] = 110,
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[17] = 110, [18] = 110, [19] = 110, [20] = 110,
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[21] = 114, [22] = 114, [23] = 114, [24] = 114,
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[25] = 111, [26] = 111, [27] = 111, [28] = 111,
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[29] = 111, [30] = 81, [31] = 82, [32] = 118,
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[33] = 118, [34] = 121, [35] = 121, [36] = 116,
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[37] = 119, [38] = 119, [39] = 122, [40] = 122,
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[41] = 117, [42] = 120, [43] = 120, [44] = 123,
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[45] = 123, [46] = 104, [47] = 104, [48] = 104,
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[49] = 104, [50] = 104, [51] = 105, [52] = 105,
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[53] = 105, [54] = 105, [55] = 105, [56] = 83,
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[57] = 84, [58] = 121, [59] = 180,
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/* 128 - 130 is a 1 to 1 mapping */
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};
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/* Annex E, table E-4 (only 2.4GHz and 4.9 / 5GHz bands) */
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static const enum band_freq oper_class_to_band_global[] = {
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[81 ... 84] = BAND_FREQ_2_4_GHZ,
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[104 ... 130] = BAND_FREQ_5_GHZ,
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};
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/* Annex E, table E-5 */
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static const uint8_t oper_class_cn_to_global[] = {
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[1] = 115, [2] = 118, [3] = 125, [4] = 116,
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[5] = 119, [6] = 126, [7] = 81, [8] = 83,
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[9] = 84,
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/* 128 - 130 is a 1 to 1 mapping */
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};
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enum band_freq band_oper_class_to_band(const uint8_t *country,
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uint8_t oper_class)
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{
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unsigned int i;
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int table = 0;
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if (country && country[2] >= 1 && country[2] <= 5)
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table = country[2];
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else if (country) {
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for (i = 0; i < L_ARRAY_SIZE(oper_class_us_codes); i++)
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if (!memcmp(oper_class_us_codes[i], country, 2)) {
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/* Use table E-1 */
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table = 1;
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break;
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}
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for (i = 0; i < L_ARRAY_SIZE(oper_class_eu_codes); i++)
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if (!memcmp(oper_class_eu_codes[i], country, 2)) {
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/* Use table E-2 */
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table = 2;
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break;
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}
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if (!memcmp("JP", country, 2))
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/* Use table E-3 */
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table = 3;
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if (!memcmp("CN", country, 2))
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/* Use table E-5 */
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table = 5;
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}
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switch (table) {
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case 1:
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if (oper_class < L_ARRAY_SIZE(oper_class_us_to_global))
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oper_class = oper_class_us_to_global[oper_class];
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break;
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case 2:
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if (oper_class < L_ARRAY_SIZE(oper_class_eu_to_global))
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oper_class = oper_class_eu_to_global[oper_class];
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break;
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case 3:
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if (oper_class < L_ARRAY_SIZE(oper_class_jp_to_global))
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oper_class = oper_class_jp_to_global[oper_class];
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break;
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case 5:
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if (oper_class < L_ARRAY_SIZE(oper_class_cn_to_global))
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oper_class = oper_class_cn_to_global[oper_class];
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break;
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}
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if (oper_class < L_ARRAY_SIZE(oper_class_to_band_global))
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return oper_class_to_band_global[oper_class];
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else
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return 0;
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}
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10
src/band.h
10
src/band.h
@ -36,6 +36,11 @@ enum band_chandef_width {
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BAND_CHANDEF_WIDTH_160,
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};
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enum band_freq {
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BAND_FREQ_2_4_GHZ = 0x1,
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BAND_FREQ_5_GHZ = 0x2,
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};
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struct band_chandef {
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uint32_t frequency;
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uint32_t channel_width;
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@ -76,3 +81,8 @@ int oci_to_frequency(uint32_t operating_class, uint32_t channel);
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int oci_verify(const uint8_t oci[static 3], const struct band_chandef *own);
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int oci_from_chandef(const struct band_chandef *own, uint8_t oci[static 3]);
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uint8_t band_freq_to_channel(uint32_t freq, enum band_freq *out_band);
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uint32_t band_channel_to_freq(uint8_t channel, enum band_freq band);
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enum band_freq band_oper_class_to_band(const uint8_t *country,
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uint8_t oper_class);
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