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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 | // SPDX-License-Identifier: GPL-2.0-only /****************************************************************************** Copyright(c) 2005 Intel Corporation. All rights reserved. Contact Information: Intel Linux Wireless <ilw@linux.intel.com> Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 ******************************************************************************/ #include <linux/compiler.h> #include <linux/errno.h> #include <linux/if_arp.h> #include <linux/in6.h> #include <linux/in.h> #include <linux/ip.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/netdevice.h> #include <linux/proc_fs.h> #include <linux/skbuff.h> #include <linux/tcp.h> #include <linux/types.h> #include <linux/wireless.h> #include <linux/etherdevice.h> #include <linux/uaccess.h> #include "libipw.h" int libipw_is_valid_channel(struct libipw_device *ieee, u8 channel) { int i; /* Driver needs to initialize the geography map before using * these helper functions */ if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) return 0; if (ieee->freq_band & LIBIPW_24GHZ_BAND) for (i = 0; i < ieee->geo.bg_channels; i++) /* NOTE: If G mode is currently supported but * this is a B only channel, we don't see it * as valid. */ if ((ieee->geo.bg[i].channel == channel) && !(ieee->geo.bg[i].flags & LIBIPW_CH_INVALID) && (!(ieee->mode & IEEE_G) || !(ieee->geo.bg[i].flags & LIBIPW_CH_B_ONLY))) return LIBIPW_24GHZ_BAND; if (ieee->freq_band & LIBIPW_52GHZ_BAND) for (i = 0; i < ieee->geo.a_channels; i++) if ((ieee->geo.a[i].channel == channel) && !(ieee->geo.a[i].flags & LIBIPW_CH_INVALID)) return LIBIPW_52GHZ_BAND; return 0; } int libipw_channel_to_index(struct libipw_device *ieee, u8 channel) { int i; /* Driver needs to initialize the geography map before using * these helper functions */ if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) return -1; if (ieee->freq_band & LIBIPW_24GHZ_BAND) for (i = 0; i < ieee->geo.bg_channels; i++) if (ieee->geo.bg[i].channel == channel) return i; if (ieee->freq_band & LIBIPW_52GHZ_BAND) for (i = 0; i < ieee->geo.a_channels; i++) if (ieee->geo.a[i].channel == channel) return i; return -1; } u32 libipw_channel_to_freq(struct libipw_device * ieee, u8 channel) { const struct libipw_channel * ch; /* Driver needs to initialize the geography map before using * these helper functions */ if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) return 0; ch = libipw_get_channel(ieee, channel); if (!ch->channel) return 0; return ch->freq; } u8 libipw_freq_to_channel(struct libipw_device * ieee, u32 freq) { int i; /* Driver needs to initialize the geography map before using * these helper functions */ if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) return 0; freq /= 100000; if (ieee->freq_band & LIBIPW_24GHZ_BAND) for (i = 0; i < ieee->geo.bg_channels; i++) if (ieee->geo.bg[i].freq == freq) return ieee->geo.bg[i].channel; if (ieee->freq_band & LIBIPW_52GHZ_BAND) for (i = 0; i < ieee->geo.a_channels; i++) if (ieee->geo.a[i].freq == freq) return ieee->geo.a[i].channel; return 0; } void libipw_set_geo(struct libipw_device *ieee, const struct libipw_geo *geo) { memcpy(ieee->geo.name, geo->name, 3); ieee->geo.name[3] = '\0'; ieee->geo.bg_channels = geo->bg_channels; ieee->geo.a_channels = geo->a_channels; memcpy(ieee->geo.bg, geo->bg, geo->bg_channels * sizeof(struct libipw_channel)); memcpy(ieee->geo.a, geo->a, ieee->geo.a_channels * sizeof(struct libipw_channel)); } const struct libipw_geo *libipw_get_geo(struct libipw_device *ieee) { return &ieee->geo; } u8 libipw_get_channel_flags(struct libipw_device * ieee, u8 channel) { int index = libipw_channel_to_index(ieee, channel); if (index == -1) return LIBIPW_CH_INVALID; if (channel <= LIBIPW_24GHZ_CHANNELS) return ieee->geo.bg[index].flags; return ieee->geo.a[index].flags; } static const struct libipw_channel bad_channel = { .channel = 0, .flags = LIBIPW_CH_INVALID, .max_power = 0, }; const struct libipw_channel *libipw_get_channel(struct libipw_device *ieee, u8 channel) { int index = libipw_channel_to_index(ieee, channel); if (index == -1) return &bad_channel; if (channel <= LIBIPW_24GHZ_CHANNELS) return &ieee->geo.bg[index]; return &ieee->geo.a[index]; } EXPORT_SYMBOL(libipw_get_channel); EXPORT_SYMBOL(libipw_get_channel_flags); EXPORT_SYMBOL(libipw_is_valid_channel); EXPORT_SYMBOL(libipw_freq_to_channel); EXPORT_SYMBOL(libipw_channel_to_freq); EXPORT_SYMBOL(libipw_channel_to_index); EXPORT_SYMBOL(libipw_set_geo); EXPORT_SYMBOL(libipw_get_geo); |