18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * P2P - generic helper functions 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2009, Atheros Communications 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 5c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * This software may be distributed under the terms of the BSD license. 6c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * See README for more details. 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "includes.h" 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common.h" 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "p2p_i.h" 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/** 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * p2p_random - Generate random string for SSID and passphrase 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @buf: Buffer for returning the result 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @len: Number of octets to write to the buffer 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Returns: 0 on success, -1 on failure 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * This function generates a random string using the following character set: 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 'A'-'Z', 'a'-'z', '0'-'9'. 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint p2p_random(char *buf, size_t len) 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 val; 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t i; 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 letters = 'Z' - 'A' + 1; 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 numbers = 10; 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (os_get_random((unsigned char *) buf, len)) 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Character set: 'A'-'Z', 'a'-'z', '0'-'9' */ 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (i = 0; i < len; i++) { 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt val = buf[i]; 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt val %= 2 * letters + numbers; 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (val < letters) 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf[i] = 'A' + val; 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else if (val < 2 * letters) 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf[i] = 'a' + (val - letters); 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf[i] = '0' + (val - 2 * letters); 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int p2p_channel_to_freq_j4(int reg_class, int channel) 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Table J-4 in P802.11REVmb/D4.0 - Global operating classes */ 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: more regulatory classes */ 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (reg_class) { 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 81: 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* channels 1..13 */ 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel < 1 || channel > 13) 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 2407 + 5 * channel; 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 82: 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* channel 14 */ 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel != 14) 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 2414 + 5 * channel; 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 83: /* channels 1..9; 40 MHz */ 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 84: /* channels 5..13; 40 MHz */ 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel < 1 || channel > 13) 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 2407 + 5 * channel; 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 115: /* channels 36,40,44,48; indoor only */ 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 118: /* channels 52,56,60,64; dfs */ 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel < 36 || channel > 64) 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 5000 + 5 * channel; 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 124: /* channels 149,153,157,161 */ 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 125: /* channels 149,153,157,161,165,169 */ 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel < 149 || channel > 161) 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 5000 + 5 * channel; 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 116: /* channels 36,44; 40 MHz; indoor only */ 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 117: /* channels 40,48; 40 MHz; indoor only */ 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 119: /* channels 52,60; 40 MHz; dfs */ 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 120: /* channels 56,64; 40 MHz; dfs */ 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel < 36 || channel > 64) 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 5000 + 5 * channel; 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 126: /* channels 149,157; 40 MHz */ 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 127: /* channels 153,161; 40 MHz */ 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel < 149 || channel > 161) 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 5000 + 5 * channel; 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/** 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * p2p_channel_to_freq - Convert channel info to frequency 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @country: Country code 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @reg_class: Regulatory class 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @channel: Channel number 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Returns: Frequency in MHz or -1 if the specified channel is unknown 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint p2p_channel_to_freq(const char *country, int reg_class, int channel) 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (country[2] == 0x04) 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return p2p_channel_to_freq_j4(reg_class, channel); 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* These are mainly for backwards compatibility; to be removed */ 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (reg_class) { 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 1: /* US/1, EU/1, JP/1 = 5 GHz, channels 36,40,44,48 */ 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel < 36 || channel > 48) 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 5000 + 5 * channel; 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 3: /* US/3 = 5 GHz, channels 149,153,157,161 */ 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 5: /* US/5 = 5 GHz, channels 149,153,157,161 */ 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel < 149 || channel > 161) 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 5000 + 5 * channel; 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 4: /* EU/4 = 2.407 GHz, channels 1..13 */ 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 12: /* US/12 = 2.407 GHz, channels 1..11 */ 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 30: /* JP/30 = 2.407 GHz, channels 1..13 */ 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel < 1 || channel > 13) 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 2407 + 5 * channel; 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case 31: /* JP/31 = 2.414 GHz, channel 14 */ 1268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (channel != 14) 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 2414 + 5 * channel; 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/** 1368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * p2p_freq_to_channel - Convert frequency into channel info 1378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @country: Country code 1388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @reg_class: Buffer for returning regulatory class 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @channel: Buffer for returning channel number 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Returns: 0 on success, -1 if the specified frequency is unknown 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint p2p_freq_to_channel(const char *country, unsigned int freq, u8 *reg_class, 1438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *channel) 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: more operating classes */ 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (freq >= 2412 && freq <= 2472) { 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *reg_class = 81; /* 2.407 GHz, channels 1..13 */ 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *channel = (freq - 2407) / 5; 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (freq == 2484) { 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *reg_class = 82; /* channel 14 */ 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *channel = 14; 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (freq >= 5180 && freq <= 5240) { 1598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *reg_class = 115; /* 5 GHz, channels 36..48 */ 1608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *channel = (freq - 5000) / 5; 1618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 1628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (freq >= 5745 && freq <= 5805) { 1658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *reg_class = 124; /* 5 GHz, channels 149..161 */ 1668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *channel = (freq - 5000) / 5; 1678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 1688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void p2p_reg_class_intersect(const struct p2p_reg_class *a, 1758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct p2p_reg_class *b, 1768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct p2p_reg_class *res) 1778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t i, j; 1798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res->reg_class = a->reg_class; 1818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (i = 0; i < a->channels; i++) { 1838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (j = 0; j < b->channels; j++) { 1848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (a->channel[i] != b->channel[j]) 1858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt continue; 1868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res->channel[res->channels] = a->channel[i]; 1878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res->channels++; 1888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (res->channels == P2P_MAX_REG_CLASS_CHANNELS) 1898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 1908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/** 1968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * p2p_channels_intersect - Intersection of supported channel lists 1978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @a: First set of supported channels 1988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @b: Second set of supported channels 1998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @res: Data structure for returning the intersection of support channels 2008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 2018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * This function can be used to find a common set of supported channels. Both 2028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * input channels sets are assumed to use the same country code. If different 2038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * country codes are used, the regulatory class numbers may not be matched 2048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * correctly and results are undefined. 2058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 2068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid p2p_channels_intersect(const struct p2p_channels *a, 2078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct p2p_channels *b, 2088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct p2p_channels *res) 2098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t i, j; 2118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(res, 0, sizeof(*res)); 2138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (i = 0; i < a->reg_classes; i++) { 2158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct p2p_reg_class *a_reg = &a->reg_class[i]; 2168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (j = 0; j < b->reg_classes; j++) { 2178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct p2p_reg_class *b_reg = &b->reg_class[j]; 2188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (a_reg->reg_class != b_reg->reg_class) 2198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt continue; 2208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt p2p_reg_class_intersect( 2218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt a_reg, b_reg, 2228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &res->reg_class[res->reg_classes]); 2238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (res->reg_class[res->reg_classes].channels) { 2248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res->reg_classes++; 2258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (res->reg_classes == P2P_MAX_REG_CLASSES) 2268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 2278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/** 2348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * p2p_channels_includes - Check whether a channel is included in the list 2358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @channels: List of supported channels 2368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @reg_class: Regulatory class of the channel to search 2378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * @channel: Channel number of the channel to search 2388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Returns: 1 if channel was found or 0 if not 2398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 2408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint p2p_channels_includes(const struct p2p_channels *channels, u8 reg_class, 2418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 channel) 2428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t i, j; 2448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (i = 0; i < channels->reg_classes; i++) { 2458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct p2p_reg_class *reg = &channels->reg_class[i]; 2468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (reg->reg_class != reg_class) 2478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt continue; 2488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (j = 0; j < reg->channels; j++) { 2498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (reg->channel[j] == channel) 2508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 1; 2518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 2548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint p2p_supported_freq(struct p2p_data *p2p, unsigned int freq) 2588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 op_reg_class, op_channel; 2608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (p2p_freq_to_channel(p2p->cfg->country, freq, 2618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &op_reg_class, &op_channel) < 0) 2628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 2638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return p2p_channels_includes(&p2p->cfg->channels, op_reg_class, 2648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt op_channel); 2658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 266