1 | #include <machine/rtems-bsd-kernel-space.h> |
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2 | |
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3 | /*- |
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4 | * Copyright (c) 2001 Atsushi Onoe |
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5 | * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting |
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6 | * All rights reserved. |
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7 | * |
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8 | * Redistribution and use in source and binary forms, with or without |
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9 | * modification, are permitted provided that the following conditions |
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10 | * are met: |
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11 | * 1. Redistributions of source code must retain the above copyright |
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12 | * notice, this list of conditions and the following disclaimer. |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <sys/cdefs.h> |
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30 | __FBSDID("$FreeBSD$"); |
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31 | |
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32 | /* |
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33 | * IEEE 802.11 generic handler |
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34 | */ |
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35 | #include <rtems/bsd/local/opt_wlan.h> |
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36 | |
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37 | #include <rtems/bsd/sys/param.h> |
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38 | #include <sys/systm.h> |
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39 | #include <sys/kernel.h> |
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40 | |
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41 | #include <sys/socket.h> |
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42 | |
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43 | #include <net/if.h> |
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44 | #include <net/if_dl.h> |
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45 | #include <net/if_media.h> |
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46 | #include <net/if_types.h> |
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47 | #include <net/ethernet.h> |
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48 | |
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49 | #include <net80211/ieee80211_var.h> |
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50 | #include <net80211/ieee80211_regdomain.h> |
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51 | #ifdef IEEE80211_SUPPORT_SUPERG |
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52 | #include <net80211/ieee80211_superg.h> |
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53 | #endif |
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54 | #include <net80211/ieee80211_ratectl.h> |
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55 | |
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56 | #include <net/bpf.h> |
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57 | |
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58 | const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { |
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59 | [IEEE80211_MODE_AUTO] = "auto", |
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60 | [IEEE80211_MODE_11A] = "11a", |
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61 | [IEEE80211_MODE_11B] = "11b", |
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62 | [IEEE80211_MODE_11G] = "11g", |
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63 | [IEEE80211_MODE_FH] = "FH", |
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64 | [IEEE80211_MODE_TURBO_A] = "turboA", |
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65 | [IEEE80211_MODE_TURBO_G] = "turboG", |
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66 | [IEEE80211_MODE_STURBO_A] = "sturboA", |
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67 | [IEEE80211_MODE_HALF] = "half", |
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68 | [IEEE80211_MODE_QUARTER] = "quarter", |
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69 | [IEEE80211_MODE_11NA] = "11na", |
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70 | [IEEE80211_MODE_11NG] = "11ng", |
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71 | }; |
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72 | /* map ieee80211_opmode to the corresponding capability bit */ |
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73 | const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { |
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74 | [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, |
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75 | [IEEE80211_M_WDS] = IEEE80211_C_WDS, |
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76 | [IEEE80211_M_STA] = IEEE80211_C_STA, |
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77 | [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, |
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78 | [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, |
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79 | [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, |
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80 | #ifdef IEEE80211_SUPPORT_MESH |
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81 | [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, |
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82 | #endif |
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83 | }; |
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84 | |
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85 | static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = |
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86 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
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87 | |
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88 | static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); |
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89 | static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); |
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90 | static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); |
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91 | static int ieee80211_media_setup(struct ieee80211com *ic, |
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92 | struct ifmedia *media, int caps, int addsta, |
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93 | ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); |
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94 | static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); |
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95 | static int ieee80211com_media_change(struct ifnet *); |
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96 | static int media_status(enum ieee80211_opmode, |
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97 | const struct ieee80211_channel *); |
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98 | |
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99 | MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); |
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100 | |
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101 | /* |
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102 | * Default supported rates for 802.11 operation (in IEEE .5Mb units). |
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103 | */ |
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104 | #define B(r) ((r) | IEEE80211_RATE_BASIC) |
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105 | static const struct ieee80211_rateset ieee80211_rateset_11a = |
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106 | { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; |
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107 | static const struct ieee80211_rateset ieee80211_rateset_half = |
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108 | { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; |
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109 | static const struct ieee80211_rateset ieee80211_rateset_quarter = |
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110 | { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; |
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111 | static const struct ieee80211_rateset ieee80211_rateset_11b = |
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112 | { 4, { B(2), B(4), B(11), B(22) } }; |
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113 | /* NB: OFDM rates are handled specially based on mode */ |
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114 | static const struct ieee80211_rateset ieee80211_rateset_11g = |
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115 | { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; |
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116 | #undef B |
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117 | |
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118 | /* |
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119 | * Fill in 802.11 available channel set, mark |
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120 | * all available channels as active, and pick |
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121 | * a default channel if not already specified. |
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122 | */ |
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123 | static void |
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124 | ieee80211_chan_init(struct ieee80211com *ic) |
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125 | { |
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126 | #define DEFAULTRATES(m, def) do { \ |
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127 | if (ic->ic_sup_rates[m].rs_nrates == 0) \ |
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128 | ic->ic_sup_rates[m] = def; \ |
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129 | } while (0) |
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130 | struct ieee80211_channel *c; |
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131 | int i; |
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132 | |
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133 | KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, |
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134 | ("invalid number of channels specified: %u", ic->ic_nchans)); |
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135 | memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); |
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136 | memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); |
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137 | setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); |
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138 | for (i = 0; i < ic->ic_nchans; i++) { |
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139 | c = &ic->ic_channels[i]; |
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140 | KASSERT(c->ic_flags != 0, ("channel with no flags")); |
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141 | /* |
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142 | * Help drivers that work only with frequencies by filling |
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143 | * in IEEE channel #'s if not already calculated. Note this |
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144 | * mimics similar work done in ieee80211_setregdomain when |
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145 | * changing regulatory state. |
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146 | */ |
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147 | if (c->ic_ieee == 0) |
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148 | c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); |
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149 | if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) |
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150 | c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + |
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151 | (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), |
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152 | c->ic_flags); |
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153 | /* default max tx power to max regulatory */ |
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154 | if (c->ic_maxpower == 0) |
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155 | c->ic_maxpower = 2*c->ic_maxregpower; |
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156 | setbit(ic->ic_chan_avail, c->ic_ieee); |
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157 | /* |
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158 | * Identify mode capabilities. |
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159 | */ |
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160 | if (IEEE80211_IS_CHAN_A(c)) |
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161 | setbit(ic->ic_modecaps, IEEE80211_MODE_11A); |
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162 | if (IEEE80211_IS_CHAN_B(c)) |
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163 | setbit(ic->ic_modecaps, IEEE80211_MODE_11B); |
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164 | if (IEEE80211_IS_CHAN_ANYG(c)) |
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165 | setbit(ic->ic_modecaps, IEEE80211_MODE_11G); |
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166 | if (IEEE80211_IS_CHAN_FHSS(c)) |
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167 | setbit(ic->ic_modecaps, IEEE80211_MODE_FH); |
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168 | if (IEEE80211_IS_CHAN_108A(c)) |
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169 | setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); |
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170 | if (IEEE80211_IS_CHAN_108G(c)) |
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171 | setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); |
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172 | if (IEEE80211_IS_CHAN_ST(c)) |
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173 | setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); |
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174 | if (IEEE80211_IS_CHAN_HALF(c)) |
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175 | setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); |
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176 | if (IEEE80211_IS_CHAN_QUARTER(c)) |
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177 | setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); |
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178 | if (IEEE80211_IS_CHAN_HTA(c)) |
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179 | setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); |
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180 | if (IEEE80211_IS_CHAN_HTG(c)) |
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181 | setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); |
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182 | } |
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183 | /* initialize candidate channels to all available */ |
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184 | memcpy(ic->ic_chan_active, ic->ic_chan_avail, |
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185 | sizeof(ic->ic_chan_avail)); |
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186 | |
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187 | /* sort channel table to allow lookup optimizations */ |
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188 | ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); |
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189 | |
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190 | /* invalidate any previous state */ |
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191 | ic->ic_bsschan = IEEE80211_CHAN_ANYC; |
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192 | ic->ic_prevchan = NULL; |
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193 | ic->ic_csa_newchan = NULL; |
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194 | /* arbitrarily pick the first channel */ |
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195 | ic->ic_curchan = &ic->ic_channels[0]; |
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196 | ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); |
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197 | |
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198 | /* fillin well-known rate sets if driver has not specified */ |
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199 | DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); |
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200 | DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); |
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201 | DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); |
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202 | DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); |
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203 | DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); |
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204 | DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); |
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205 | DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); |
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206 | DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); |
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207 | DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); |
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208 | DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); |
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209 | |
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210 | /* |
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211 | * Setup required information to fill the mcsset field, if driver did |
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212 | * not. Assume a 2T2R setup for historic reasons. |
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213 | */ |
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214 | if (ic->ic_rxstream == 0) |
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215 | ic->ic_rxstream = 2; |
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216 | if (ic->ic_txstream == 0) |
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217 | ic->ic_txstream = 2; |
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218 | |
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219 | /* |
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220 | * Set auto mode to reset active channel state and any desired channel. |
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221 | */ |
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222 | (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); |
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223 | #undef DEFAULTRATES |
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224 | } |
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225 | |
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226 | static void |
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227 | null_update_mcast(struct ifnet *ifp) |
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228 | { |
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229 | if_printf(ifp, "need multicast update callback\n"); |
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230 | } |
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231 | |
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232 | static void |
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233 | null_update_promisc(struct ifnet *ifp) |
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234 | { |
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235 | if_printf(ifp, "need promiscuous mode update callback\n"); |
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236 | } |
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237 | |
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238 | static int |
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239 | null_transmit(struct ifnet *ifp, struct mbuf *m) |
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240 | { |
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241 | m_freem(m); |
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242 | ifp->if_oerrors++; |
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243 | return EACCES; /* XXX EIO/EPERM? */ |
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244 | } |
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245 | |
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246 | static int |
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247 | null_output(struct ifnet *ifp, struct mbuf *m, |
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248 | struct sockaddr *dst, struct route *ro) |
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249 | { |
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250 | if_printf(ifp, "discard raw packet\n"); |
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251 | return null_transmit(ifp, m); |
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252 | } |
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253 | |
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254 | static void |
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255 | null_input(struct ifnet *ifp, struct mbuf *m) |
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256 | { |
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257 | if_printf(ifp, "if_input should not be called\n"); |
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258 | m_freem(m); |
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259 | } |
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260 | |
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261 | /* |
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262 | * Attach/setup the common net80211 state. Called by |
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263 | * the driver on attach to prior to creating any vap's. |
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264 | */ |
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265 | void |
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266 | ieee80211_ifattach(struct ieee80211com *ic, |
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267 | const uint8_t macaddr[IEEE80211_ADDR_LEN]) |
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268 | { |
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269 | struct ifnet *ifp = ic->ic_ifp; |
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270 | struct sockaddr_dl *sdl; |
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271 | struct ifaddr *ifa; |
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272 | |
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273 | KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); |
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274 | |
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275 | IEEE80211_LOCK_INIT(ic, ifp->if_xname); |
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276 | TAILQ_INIT(&ic->ic_vaps); |
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277 | |
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278 | /* Create a taskqueue for all state changes */ |
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279 | ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, |
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280 | taskqueue_thread_enqueue, &ic->ic_tq); |
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281 | taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq", |
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282 | ifp->if_xname); |
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283 | /* |
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284 | * Fill in 802.11 available channel set, mark all |
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285 | * available channels as active, and pick a default |
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286 | * channel if not already specified. |
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287 | */ |
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288 | ieee80211_media_init(ic); |
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289 | |
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290 | ic->ic_update_mcast = null_update_mcast; |
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291 | ic->ic_update_promisc = null_update_promisc; |
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292 | |
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293 | ic->ic_hash_key = arc4random(); |
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294 | ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; |
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295 | ic->ic_lintval = ic->ic_bintval; |
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296 | ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; |
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297 | |
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298 | ieee80211_crypto_attach(ic); |
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299 | ieee80211_node_attach(ic); |
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300 | ieee80211_power_attach(ic); |
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301 | ieee80211_proto_attach(ic); |
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302 | #ifdef IEEE80211_SUPPORT_SUPERG |
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303 | ieee80211_superg_attach(ic); |
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304 | #endif |
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305 | ieee80211_ht_attach(ic); |
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306 | ieee80211_scan_attach(ic); |
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307 | ieee80211_regdomain_attach(ic); |
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308 | ieee80211_dfs_attach(ic); |
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309 | |
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310 | ieee80211_sysctl_attach(ic); |
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311 | |
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312 | ifp->if_addrlen = IEEE80211_ADDR_LEN; |
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313 | ifp->if_hdrlen = 0; |
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314 | if_attach(ifp); |
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315 | ifp->if_mtu = IEEE80211_MTU_MAX; |
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316 | ifp->if_broadcastaddr = ieee80211broadcastaddr; |
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317 | ifp->if_output = null_output; |
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318 | ifp->if_input = null_input; /* just in case */ |
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319 | ifp->if_resolvemulti = NULL; /* NB: callers check */ |
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320 | |
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321 | ifa = ifaddr_byindex(ifp->if_index); |
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322 | KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); |
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323 | sdl = (struct sockaddr_dl *)ifa->ifa_addr; |
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324 | sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ |
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325 | sdl->sdl_alen = IEEE80211_ADDR_LEN; |
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326 | IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); |
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327 | ifa_free(ifa); |
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328 | } |
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329 | |
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330 | /* |
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331 | * Detach net80211 state on device detach. Tear down |
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332 | * all vap's and reclaim all common state prior to the |
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333 | * device state going away. Note we may call back into |
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334 | * driver; it must be prepared for this. |
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335 | */ |
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336 | void |
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337 | ieee80211_ifdetach(struct ieee80211com *ic) |
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338 | { |
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339 | struct ifnet *ifp = ic->ic_ifp; |
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340 | struct ieee80211vap *vap; |
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341 | |
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342 | if_detach(ifp); |
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343 | |
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344 | while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) |
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345 | ieee80211_vap_destroy(vap); |
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346 | ieee80211_waitfor_parent(ic); |
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347 | |
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348 | ieee80211_sysctl_detach(ic); |
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349 | ieee80211_dfs_detach(ic); |
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350 | ieee80211_regdomain_detach(ic); |
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351 | ieee80211_scan_detach(ic); |
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352 | #ifdef IEEE80211_SUPPORT_SUPERG |
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353 | ieee80211_superg_detach(ic); |
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354 | #endif |
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355 | ieee80211_ht_detach(ic); |
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356 | /* NB: must be called before ieee80211_node_detach */ |
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357 | ieee80211_proto_detach(ic); |
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358 | ieee80211_crypto_detach(ic); |
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359 | ieee80211_power_detach(ic); |
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360 | ieee80211_node_detach(ic); |
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361 | |
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362 | ifmedia_removeall(&ic->ic_media); |
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363 | taskqueue_free(ic->ic_tq); |
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364 | IEEE80211_LOCK_DESTROY(ic); |
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365 | } |
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366 | |
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367 | /* |
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368 | * Default reset method for use with the ioctl support. This |
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369 | * method is invoked after any state change in the 802.11 |
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370 | * layer that should be propagated to the hardware but not |
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371 | * require re-initialization of the 802.11 state machine (e.g |
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372 | * rescanning for an ap). We always return ENETRESET which |
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373 | * should cause the driver to re-initialize the device. Drivers |
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374 | * can override this method to implement more optimized support. |
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375 | */ |
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376 | static int |
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377 | default_reset(struct ieee80211vap *vap, u_long cmd) |
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378 | { |
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379 | return ENETRESET; |
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380 | } |
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381 | |
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382 | /* |
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383 | * Prepare a vap for use. Drivers use this call to |
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384 | * setup net80211 state in new vap's prior attaching |
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385 | * them with ieee80211_vap_attach (below). |
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386 | */ |
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387 | int |
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388 | ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, |
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389 | const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, |
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390 | int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], |
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391 | const uint8_t macaddr[IEEE80211_ADDR_LEN]) |
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392 | { |
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393 | struct ifnet *ifp; |
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394 | |
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395 | ifp = if_alloc(IFT_ETHER); |
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396 | if (ifp == NULL) { |
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397 | if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", |
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398 | __func__); |
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399 | return ENOMEM; |
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400 | } |
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401 | if_initname(ifp, name, unit); |
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402 | ifp->if_softc = vap; /* back pointer */ |
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403 | ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; |
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404 | ifp->if_start = ieee80211_start; |
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405 | ifp->if_ioctl = ieee80211_ioctl; |
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406 | ifp->if_init = ieee80211_init; |
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407 | /* NB: input+output filled in by ether_ifattach */ |
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408 | IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); |
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409 | ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; |
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410 | IFQ_SET_READY(&ifp->if_snd); |
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411 | |
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412 | vap->iv_ifp = ifp; |
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413 | vap->iv_ic = ic; |
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414 | vap->iv_flags = ic->ic_flags; /* propagate common flags */ |
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415 | vap->iv_flags_ext = ic->ic_flags_ext; |
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416 | vap->iv_flags_ven = ic->ic_flags_ven; |
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417 | vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; |
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418 | vap->iv_htcaps = ic->ic_htcaps; |
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419 | vap->iv_htextcaps = ic->ic_htextcaps; |
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420 | vap->iv_opmode = opmode; |
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421 | vap->iv_caps |= ieee80211_opcap[opmode]; |
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422 | switch (opmode) { |
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423 | case IEEE80211_M_WDS: |
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424 | /* |
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425 | * WDS links must specify the bssid of the far end. |
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426 | * For legacy operation this is a static relationship. |
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427 | * For non-legacy operation the station must associate |
---|
428 | * and be authorized to pass traffic. Plumbing the |
---|
429 | * vap to the proper node happens when the vap |
---|
430 | * transitions to RUN state. |
---|
431 | */ |
---|
432 | IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); |
---|
433 | vap->iv_flags |= IEEE80211_F_DESBSSID; |
---|
434 | if (flags & IEEE80211_CLONE_WDSLEGACY) |
---|
435 | vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; |
---|
436 | break; |
---|
437 | #ifdef IEEE80211_SUPPORT_TDMA |
---|
438 | case IEEE80211_M_AHDEMO: |
---|
439 | if (flags & IEEE80211_CLONE_TDMA) { |
---|
440 | /* NB: checked before clone operation allowed */ |
---|
441 | KASSERT(ic->ic_caps & IEEE80211_C_TDMA, |
---|
442 | ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); |
---|
443 | /* |
---|
444 | * Propagate TDMA capability to mark vap; this |
---|
445 | * cannot be removed and is used to distinguish |
---|
446 | * regular ahdemo operation from ahdemo+tdma. |
---|
447 | */ |
---|
448 | vap->iv_caps |= IEEE80211_C_TDMA; |
---|
449 | } |
---|
450 | break; |
---|
451 | #endif |
---|
452 | default: |
---|
453 | break; |
---|
454 | } |
---|
455 | /* auto-enable s/w beacon miss support */ |
---|
456 | if (flags & IEEE80211_CLONE_NOBEACONS) |
---|
457 | vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; |
---|
458 | /* auto-generated or user supplied MAC address */ |
---|
459 | if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) |
---|
460 | vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; |
---|
461 | /* |
---|
462 | * Enable various functionality by default if we're |
---|
463 | * capable; the driver can override us if it knows better. |
---|
464 | */ |
---|
465 | if (vap->iv_caps & IEEE80211_C_WME) |
---|
466 | vap->iv_flags |= IEEE80211_F_WME; |
---|
467 | if (vap->iv_caps & IEEE80211_C_BURST) |
---|
468 | vap->iv_flags |= IEEE80211_F_BURST; |
---|
469 | /* NB: bg scanning only makes sense for station mode right now */ |
---|
470 | if (vap->iv_opmode == IEEE80211_M_STA && |
---|
471 | (vap->iv_caps & IEEE80211_C_BGSCAN)) |
---|
472 | vap->iv_flags |= IEEE80211_F_BGSCAN; |
---|
473 | vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ |
---|
474 | /* NB: DFS support only makes sense for ap mode right now */ |
---|
475 | if (vap->iv_opmode == IEEE80211_M_HOSTAP && |
---|
476 | (vap->iv_caps & IEEE80211_C_DFS)) |
---|
477 | vap->iv_flags_ext |= IEEE80211_FEXT_DFS; |
---|
478 | |
---|
479 | vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ |
---|
480 | vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; |
---|
481 | vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; |
---|
482 | /* |
---|
483 | * Install a default reset method for the ioctl support; |
---|
484 | * the driver can override this. |
---|
485 | */ |
---|
486 | vap->iv_reset = default_reset; |
---|
487 | |
---|
488 | IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); |
---|
489 | |
---|
490 | ieee80211_sysctl_vattach(vap); |
---|
491 | ieee80211_crypto_vattach(vap); |
---|
492 | ieee80211_node_vattach(vap); |
---|
493 | ieee80211_power_vattach(vap); |
---|
494 | ieee80211_proto_vattach(vap); |
---|
495 | #ifdef IEEE80211_SUPPORT_SUPERG |
---|
496 | ieee80211_superg_vattach(vap); |
---|
497 | #endif |
---|
498 | ieee80211_ht_vattach(vap); |
---|
499 | ieee80211_scan_vattach(vap); |
---|
500 | ieee80211_regdomain_vattach(vap); |
---|
501 | ieee80211_radiotap_vattach(vap); |
---|
502 | ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); |
---|
503 | |
---|
504 | return 0; |
---|
505 | } |
---|
506 | |
---|
507 | /* |
---|
508 | * Activate a vap. State should have been prepared with a |
---|
509 | * call to ieee80211_vap_setup and by the driver. On return |
---|
510 | * from this call the vap is ready for use. |
---|
511 | */ |
---|
512 | int |
---|
513 | ieee80211_vap_attach(struct ieee80211vap *vap, |
---|
514 | ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) |
---|
515 | { |
---|
516 | struct ifnet *ifp = vap->iv_ifp; |
---|
517 | struct ieee80211com *ic = vap->iv_ic; |
---|
518 | struct ifmediareq imr; |
---|
519 | int maxrate; |
---|
520 | |
---|
521 | IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, |
---|
522 | "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", |
---|
523 | __func__, ieee80211_opmode_name[vap->iv_opmode], |
---|
524 | ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); |
---|
525 | |
---|
526 | /* |
---|
527 | * Do late attach work that cannot happen until after |
---|
528 | * the driver has had a chance to override defaults. |
---|
529 | */ |
---|
530 | ieee80211_node_latevattach(vap); |
---|
531 | ieee80211_power_latevattach(vap); |
---|
532 | |
---|
533 | maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, |
---|
534 | vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); |
---|
535 | ieee80211_media_status(ifp, &imr); |
---|
536 | /* NB: strip explicit mode; we're actually in autoselect */ |
---|
537 | ifmedia_set(&vap->iv_media, |
---|
538 | imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); |
---|
539 | if (maxrate) |
---|
540 | ifp->if_baudrate = IF_Mbps(maxrate); |
---|
541 | |
---|
542 | ether_ifattach(ifp, vap->iv_myaddr); |
---|
543 | if (vap->iv_opmode == IEEE80211_M_MONITOR) { |
---|
544 | /* NB: disallow transmit */ |
---|
545 | ifp->if_transmit = null_transmit; |
---|
546 | ifp->if_output = null_output; |
---|
547 | } else { |
---|
548 | /* hook output method setup by ether_ifattach */ |
---|
549 | vap->iv_output = ifp->if_output; |
---|
550 | ifp->if_output = ieee80211_output; |
---|
551 | } |
---|
552 | /* NB: if_mtu set by ether_ifattach to ETHERMTU */ |
---|
553 | |
---|
554 | IEEE80211_LOCK(ic); |
---|
555 | TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); |
---|
556 | ieee80211_syncflag_locked(ic, IEEE80211_F_WME); |
---|
557 | #ifdef IEEE80211_SUPPORT_SUPERG |
---|
558 | ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); |
---|
559 | #endif |
---|
560 | ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); |
---|
561 | ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); |
---|
562 | ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); |
---|
563 | ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); |
---|
564 | ieee80211_syncifflag_locked(ic, IFF_PROMISC); |
---|
565 | ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); |
---|
566 | IEEE80211_UNLOCK(ic); |
---|
567 | |
---|
568 | return 1; |
---|
569 | } |
---|
570 | |
---|
571 | /* |
---|
572 | * Tear down vap state and reclaim the ifnet. |
---|
573 | * The driver is assumed to have prepared for |
---|
574 | * this; e.g. by turning off interrupts for the |
---|
575 | * underlying device. |
---|
576 | */ |
---|
577 | void |
---|
578 | ieee80211_vap_detach(struct ieee80211vap *vap) |
---|
579 | { |
---|
580 | struct ieee80211com *ic = vap->iv_ic; |
---|
581 | struct ifnet *ifp = vap->iv_ifp; |
---|
582 | |
---|
583 | IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", |
---|
584 | __func__, ieee80211_opmode_name[vap->iv_opmode], |
---|
585 | ic->ic_ifp->if_xname); |
---|
586 | |
---|
587 | /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ |
---|
588 | ether_ifdetach(ifp); |
---|
589 | |
---|
590 | ieee80211_stop(vap); |
---|
591 | |
---|
592 | /* |
---|
593 | * Flush any deferred vap tasks. |
---|
594 | */ |
---|
595 | ieee80211_draintask(ic, &vap->iv_nstate_task); |
---|
596 | ieee80211_draintask(ic, &vap->iv_swbmiss_task); |
---|
597 | |
---|
598 | /* XXX band-aid until ifnet handles this for us */ |
---|
599 | taskqueue_drain(taskqueue_swi, &ifp->if_linktask); |
---|
600 | |
---|
601 | IEEE80211_LOCK(ic); |
---|
602 | KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); |
---|
603 | TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); |
---|
604 | ieee80211_syncflag_locked(ic, IEEE80211_F_WME); |
---|
605 | #ifdef IEEE80211_SUPPORT_SUPERG |
---|
606 | ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); |
---|
607 | #endif |
---|
608 | ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); |
---|
609 | ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); |
---|
610 | ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); |
---|
611 | ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); |
---|
612 | /* NB: this handles the bpfdetach done below */ |
---|
613 | ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); |
---|
614 | ieee80211_syncifflag_locked(ic, IFF_PROMISC); |
---|
615 | ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); |
---|
616 | IEEE80211_UNLOCK(ic); |
---|
617 | |
---|
618 | ifmedia_removeall(&vap->iv_media); |
---|
619 | |
---|
620 | ieee80211_radiotap_vdetach(vap); |
---|
621 | ieee80211_regdomain_vdetach(vap); |
---|
622 | ieee80211_scan_vdetach(vap); |
---|
623 | #ifdef IEEE80211_SUPPORT_SUPERG |
---|
624 | ieee80211_superg_vdetach(vap); |
---|
625 | #endif |
---|
626 | ieee80211_ht_vdetach(vap); |
---|
627 | /* NB: must be before ieee80211_node_vdetach */ |
---|
628 | ieee80211_proto_vdetach(vap); |
---|
629 | ieee80211_crypto_vdetach(vap); |
---|
630 | ieee80211_power_vdetach(vap); |
---|
631 | ieee80211_node_vdetach(vap); |
---|
632 | ieee80211_sysctl_vdetach(vap); |
---|
633 | |
---|
634 | if_free(ifp); |
---|
635 | } |
---|
636 | |
---|
637 | /* |
---|
638 | * Synchronize flag bit state in the parent ifnet structure |
---|
639 | * according to the state of all vap ifnet's. This is used, |
---|
640 | * for example, to handle IFF_PROMISC and IFF_ALLMULTI. |
---|
641 | */ |
---|
642 | void |
---|
643 | ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) |
---|
644 | { |
---|
645 | struct ifnet *ifp = ic->ic_ifp; |
---|
646 | struct ieee80211vap *vap; |
---|
647 | int bit, oflags; |
---|
648 | |
---|
649 | IEEE80211_LOCK_ASSERT(ic); |
---|
650 | |
---|
651 | bit = 0; |
---|
652 | TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) |
---|
653 | if (vap->iv_ifp->if_flags & flag) { |
---|
654 | /* |
---|
655 | * XXX the bridge sets PROMISC but we don't want to |
---|
656 | * enable it on the device, discard here so all the |
---|
657 | * drivers don't need to special-case it |
---|
658 | */ |
---|
659 | if (flag == IFF_PROMISC && |
---|
660 | !(vap->iv_opmode == IEEE80211_M_MONITOR || |
---|
661 | (vap->iv_opmode == IEEE80211_M_AHDEMO && |
---|
662 | (vap->iv_caps & IEEE80211_C_TDMA) == 0))) |
---|
663 | continue; |
---|
664 | bit = 1; |
---|
665 | break; |
---|
666 | } |
---|
667 | oflags = ifp->if_flags; |
---|
668 | if (bit) |
---|
669 | ifp->if_flags |= flag; |
---|
670 | else |
---|
671 | ifp->if_flags &= ~flag; |
---|
672 | if ((ifp->if_flags ^ oflags) & flag) { |
---|
673 | /* XXX should we return 1/0 and let caller do this? */ |
---|
674 | if (ifp->if_drv_flags & IFF_DRV_RUNNING) { |
---|
675 | if (flag == IFF_PROMISC) |
---|
676 | ieee80211_runtask(ic, &ic->ic_promisc_task); |
---|
677 | else if (flag == IFF_ALLMULTI) |
---|
678 | ieee80211_runtask(ic, &ic->ic_mcast_task); |
---|
679 | } |
---|
680 | } |
---|
681 | } |
---|
682 | |
---|
683 | /* |
---|
684 | * Synchronize flag bit state in the com structure |
---|
685 | * according to the state of all vap's. This is used, |
---|
686 | * for example, to handle state changes via ioctls. |
---|
687 | */ |
---|
688 | static void |
---|
689 | ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) |
---|
690 | { |
---|
691 | struct ieee80211vap *vap; |
---|
692 | int bit; |
---|
693 | |
---|
694 | IEEE80211_LOCK_ASSERT(ic); |
---|
695 | |
---|
696 | bit = 0; |
---|
697 | TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) |
---|
698 | if (vap->iv_flags & flag) { |
---|
699 | bit = 1; |
---|
700 | break; |
---|
701 | } |
---|
702 | if (bit) |
---|
703 | ic->ic_flags |= flag; |
---|
704 | else |
---|
705 | ic->ic_flags &= ~flag; |
---|
706 | } |
---|
707 | |
---|
708 | void |
---|
709 | ieee80211_syncflag(struct ieee80211vap *vap, int flag) |
---|
710 | { |
---|
711 | struct ieee80211com *ic = vap->iv_ic; |
---|
712 | |
---|
713 | IEEE80211_LOCK(ic); |
---|
714 | if (flag < 0) { |
---|
715 | flag = -flag; |
---|
716 | vap->iv_flags &= ~flag; |
---|
717 | } else |
---|
718 | vap->iv_flags |= flag; |
---|
719 | ieee80211_syncflag_locked(ic, flag); |
---|
720 | IEEE80211_UNLOCK(ic); |
---|
721 | } |
---|
722 | |
---|
723 | /* |
---|
724 | * Synchronize flags_ht bit state in the com structure |
---|
725 | * according to the state of all vap's. This is used, |
---|
726 | * for example, to handle state changes via ioctls. |
---|
727 | */ |
---|
728 | static void |
---|
729 | ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) |
---|
730 | { |
---|
731 | struct ieee80211vap *vap; |
---|
732 | int bit; |
---|
733 | |
---|
734 | IEEE80211_LOCK_ASSERT(ic); |
---|
735 | |
---|
736 | bit = 0; |
---|
737 | TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) |
---|
738 | if (vap->iv_flags_ht & flag) { |
---|
739 | bit = 1; |
---|
740 | break; |
---|
741 | } |
---|
742 | if (bit) |
---|
743 | ic->ic_flags_ht |= flag; |
---|
744 | else |
---|
745 | ic->ic_flags_ht &= ~flag; |
---|
746 | } |
---|
747 | |
---|
748 | void |
---|
749 | ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) |
---|
750 | { |
---|
751 | struct ieee80211com *ic = vap->iv_ic; |
---|
752 | |
---|
753 | IEEE80211_LOCK(ic); |
---|
754 | if (flag < 0) { |
---|
755 | flag = -flag; |
---|
756 | vap->iv_flags_ht &= ~flag; |
---|
757 | } else |
---|
758 | vap->iv_flags_ht |= flag; |
---|
759 | ieee80211_syncflag_ht_locked(ic, flag); |
---|
760 | IEEE80211_UNLOCK(ic); |
---|
761 | } |
---|
762 | |
---|
763 | /* |
---|
764 | * Synchronize flags_ext bit state in the com structure |
---|
765 | * according to the state of all vap's. This is used, |
---|
766 | * for example, to handle state changes via ioctls. |
---|
767 | */ |
---|
768 | static void |
---|
769 | ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) |
---|
770 | { |
---|
771 | struct ieee80211vap *vap; |
---|
772 | int bit; |
---|
773 | |
---|
774 | IEEE80211_LOCK_ASSERT(ic); |
---|
775 | |
---|
776 | bit = 0; |
---|
777 | TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) |
---|
778 | if (vap->iv_flags_ext & flag) { |
---|
779 | bit = 1; |
---|
780 | break; |
---|
781 | } |
---|
782 | if (bit) |
---|
783 | ic->ic_flags_ext |= flag; |
---|
784 | else |
---|
785 | ic->ic_flags_ext &= ~flag; |
---|
786 | } |
---|
787 | |
---|
788 | void |
---|
789 | ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) |
---|
790 | { |
---|
791 | struct ieee80211com *ic = vap->iv_ic; |
---|
792 | |
---|
793 | IEEE80211_LOCK(ic); |
---|
794 | if (flag < 0) { |
---|
795 | flag = -flag; |
---|
796 | vap->iv_flags_ext &= ~flag; |
---|
797 | } else |
---|
798 | vap->iv_flags_ext |= flag; |
---|
799 | ieee80211_syncflag_ext_locked(ic, flag); |
---|
800 | IEEE80211_UNLOCK(ic); |
---|
801 | } |
---|
802 | |
---|
803 | static __inline int |
---|
804 | mapgsm(u_int freq, u_int flags) |
---|
805 | { |
---|
806 | freq *= 10; |
---|
807 | if (flags & IEEE80211_CHAN_QUARTER) |
---|
808 | freq += 5; |
---|
809 | else if (flags & IEEE80211_CHAN_HALF) |
---|
810 | freq += 10; |
---|
811 | else |
---|
812 | freq += 20; |
---|
813 | /* NB: there is no 907/20 wide but leave room */ |
---|
814 | return (freq - 906*10) / 5; |
---|
815 | } |
---|
816 | |
---|
817 | static __inline int |
---|
818 | mappsb(u_int freq, u_int flags) |
---|
819 | { |
---|
820 | return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; |
---|
821 | } |
---|
822 | |
---|
823 | /* |
---|
824 | * Convert MHz frequency to IEEE channel number. |
---|
825 | */ |
---|
826 | int |
---|
827 | ieee80211_mhz2ieee(u_int freq, u_int flags) |
---|
828 | { |
---|
829 | #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) |
---|
830 | if (flags & IEEE80211_CHAN_GSM) |
---|
831 | return mapgsm(freq, flags); |
---|
832 | if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ |
---|
833 | if (freq == 2484) |
---|
834 | return 14; |
---|
835 | if (freq < 2484) |
---|
836 | return ((int) freq - 2407) / 5; |
---|
837 | else |
---|
838 | return 15 + ((freq - 2512) / 20); |
---|
839 | } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ |
---|
840 | if (freq <= 5000) { |
---|
841 | /* XXX check regdomain? */ |
---|
842 | if (IS_FREQ_IN_PSB(freq)) |
---|
843 | return mappsb(freq, flags); |
---|
844 | return (freq - 4000) / 5; |
---|
845 | } else |
---|
846 | return (freq - 5000) / 5; |
---|
847 | } else { /* either, guess */ |
---|
848 | if (freq == 2484) |
---|
849 | return 14; |
---|
850 | if (freq < 2484) { |
---|
851 | if (907 <= freq && freq <= 922) |
---|
852 | return mapgsm(freq, flags); |
---|
853 | return ((int) freq - 2407) / 5; |
---|
854 | } |
---|
855 | if (freq < 5000) { |
---|
856 | if (IS_FREQ_IN_PSB(freq)) |
---|
857 | return mappsb(freq, flags); |
---|
858 | else if (freq > 4900) |
---|
859 | return (freq - 4000) / 5; |
---|
860 | else |
---|
861 | return 15 + ((freq - 2512) / 20); |
---|
862 | } |
---|
863 | return (freq - 5000) / 5; |
---|
864 | } |
---|
865 | #undef IS_FREQ_IN_PSB |
---|
866 | } |
---|
867 | |
---|
868 | /* |
---|
869 | * Convert channel to IEEE channel number. |
---|
870 | */ |
---|
871 | int |
---|
872 | ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) |
---|
873 | { |
---|
874 | if (c == NULL) { |
---|
875 | if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); |
---|
876 | return 0; /* XXX */ |
---|
877 | } |
---|
878 | return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); |
---|
879 | } |
---|
880 | |
---|
881 | /* |
---|
882 | * Convert IEEE channel number to MHz frequency. |
---|
883 | */ |
---|
884 | u_int |
---|
885 | ieee80211_ieee2mhz(u_int chan, u_int flags) |
---|
886 | { |
---|
887 | if (flags & IEEE80211_CHAN_GSM) |
---|
888 | return 907 + 5 * (chan / 10); |
---|
889 | if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ |
---|
890 | if (chan == 14) |
---|
891 | return 2484; |
---|
892 | if (chan < 14) |
---|
893 | return 2407 + chan*5; |
---|
894 | else |
---|
895 | return 2512 + ((chan-15)*20); |
---|
896 | } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ |
---|
897 | if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { |
---|
898 | chan -= 37; |
---|
899 | return 4940 + chan*5 + (chan % 5 ? 2 : 0); |
---|
900 | } |
---|
901 | return 5000 + (chan*5); |
---|
902 | } else { /* either, guess */ |
---|
903 | /* XXX can't distinguish PSB+GSM channels */ |
---|
904 | if (chan == 14) |
---|
905 | return 2484; |
---|
906 | if (chan < 14) /* 0-13 */ |
---|
907 | return 2407 + chan*5; |
---|
908 | if (chan < 27) /* 15-26 */ |
---|
909 | return 2512 + ((chan-15)*20); |
---|
910 | return 5000 + (chan*5); |
---|
911 | } |
---|
912 | } |
---|
913 | |
---|
914 | /* |
---|
915 | * Locate a channel given a frequency+flags. We cache |
---|
916 | * the previous lookup to optimize switching between two |
---|
917 | * channels--as happens with dynamic turbo. |
---|
918 | */ |
---|
919 | struct ieee80211_channel * |
---|
920 | ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) |
---|
921 | { |
---|
922 | struct ieee80211_channel *c; |
---|
923 | int i; |
---|
924 | |
---|
925 | flags &= IEEE80211_CHAN_ALLTURBO; |
---|
926 | c = ic->ic_prevchan; |
---|
927 | if (c != NULL && c->ic_freq == freq && |
---|
928 | (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) |
---|
929 | return c; |
---|
930 | /* brute force search */ |
---|
931 | for (i = 0; i < ic->ic_nchans; i++) { |
---|
932 | c = &ic->ic_channels[i]; |
---|
933 | if (c->ic_freq == freq && |
---|
934 | (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) |
---|
935 | return c; |
---|
936 | } |
---|
937 | return NULL; |
---|
938 | } |
---|
939 | |
---|
940 | /* |
---|
941 | * Locate a channel given a channel number+flags. We cache |
---|
942 | * the previous lookup to optimize switching between two |
---|
943 | * channels--as happens with dynamic turbo. |
---|
944 | */ |
---|
945 | struct ieee80211_channel * |
---|
946 | ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) |
---|
947 | { |
---|
948 | struct ieee80211_channel *c; |
---|
949 | int i; |
---|
950 | |
---|
951 | flags &= IEEE80211_CHAN_ALLTURBO; |
---|
952 | c = ic->ic_prevchan; |
---|
953 | if (c != NULL && c->ic_ieee == ieee && |
---|
954 | (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) |
---|
955 | return c; |
---|
956 | /* brute force search */ |
---|
957 | for (i = 0; i < ic->ic_nchans; i++) { |
---|
958 | c = &ic->ic_channels[i]; |
---|
959 | if (c->ic_ieee == ieee && |
---|
960 | (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) |
---|
961 | return c; |
---|
962 | } |
---|
963 | return NULL; |
---|
964 | } |
---|
965 | |
---|
966 | static void |
---|
967 | addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) |
---|
968 | { |
---|
969 | #define ADD(_ic, _s, _o) \ |
---|
970 | ifmedia_add(media, \ |
---|
971 | IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) |
---|
972 | static const u_int mopts[IEEE80211_MODE_MAX] = { |
---|
973 | [IEEE80211_MODE_AUTO] = IFM_AUTO, |
---|
974 | [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, |
---|
975 | [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, |
---|
976 | [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, |
---|
977 | [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, |
---|
978 | [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, |
---|
979 | [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, |
---|
980 | [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, |
---|
981 | [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ |
---|
982 | [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ |
---|
983 | [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, |
---|
984 | [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, |
---|
985 | }; |
---|
986 | u_int mopt; |
---|
987 | |
---|
988 | mopt = mopts[mode]; |
---|
989 | if (addsta) |
---|
990 | ADD(ic, mword, mopt); /* STA mode has no cap */ |
---|
991 | if (caps & IEEE80211_C_IBSS) |
---|
992 | ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); |
---|
993 | if (caps & IEEE80211_C_HOSTAP) |
---|
994 | ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); |
---|
995 | if (caps & IEEE80211_C_AHDEMO) |
---|
996 | ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); |
---|
997 | if (caps & IEEE80211_C_MONITOR) |
---|
998 | ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); |
---|
999 | if (caps & IEEE80211_C_WDS) |
---|
1000 | ADD(media, mword, mopt | IFM_IEEE80211_WDS); |
---|
1001 | if (caps & IEEE80211_C_MBSS) |
---|
1002 | ADD(media, mword, mopt | IFM_IEEE80211_MBSS); |
---|
1003 | #undef ADD |
---|
1004 | } |
---|
1005 | |
---|
1006 | /* |
---|
1007 | * Setup the media data structures according to the channel and |
---|
1008 | * rate tables. |
---|
1009 | */ |
---|
1010 | static int |
---|
1011 | ieee80211_media_setup(struct ieee80211com *ic, |
---|
1012 | struct ifmedia *media, int caps, int addsta, |
---|
1013 | ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) |
---|
1014 | { |
---|
1015 | int i, j, rate, maxrate, mword, r; |
---|
1016 | enum ieee80211_phymode mode; |
---|
1017 | const struct ieee80211_rateset *rs; |
---|
1018 | struct ieee80211_rateset allrates; |
---|
1019 | |
---|
1020 | /* |
---|
1021 | * Fill in media characteristics. |
---|
1022 | */ |
---|
1023 | ifmedia_init(media, 0, media_change, media_stat); |
---|
1024 | maxrate = 0; |
---|
1025 | /* |
---|
1026 | * Add media for legacy operating modes. |
---|
1027 | */ |
---|
1028 | memset(&allrates, 0, sizeof(allrates)); |
---|
1029 | for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { |
---|
1030 | if (isclr(ic->ic_modecaps, mode)) |
---|
1031 | continue; |
---|
1032 | addmedia(media, caps, addsta, mode, IFM_AUTO); |
---|
1033 | if (mode == IEEE80211_MODE_AUTO) |
---|
1034 | continue; |
---|
1035 | rs = &ic->ic_sup_rates[mode]; |
---|
1036 | for (i = 0; i < rs->rs_nrates; i++) { |
---|
1037 | rate = rs->rs_rates[i]; |
---|
1038 | mword = ieee80211_rate2media(ic, rate, mode); |
---|
1039 | if (mword == 0) |
---|
1040 | continue; |
---|
1041 | addmedia(media, caps, addsta, mode, mword); |
---|
1042 | /* |
---|
1043 | * Add legacy rate to the collection of all rates. |
---|
1044 | */ |
---|
1045 | r = rate & IEEE80211_RATE_VAL; |
---|
1046 | for (j = 0; j < allrates.rs_nrates; j++) |
---|
1047 | if (allrates.rs_rates[j] == r) |
---|
1048 | break; |
---|
1049 | if (j == allrates.rs_nrates) { |
---|
1050 | /* unique, add to the set */ |
---|
1051 | allrates.rs_rates[j] = r; |
---|
1052 | allrates.rs_nrates++; |
---|
1053 | } |
---|
1054 | rate = (rate & IEEE80211_RATE_VAL) / 2; |
---|
1055 | if (rate > maxrate) |
---|
1056 | maxrate = rate; |
---|
1057 | } |
---|
1058 | } |
---|
1059 | for (i = 0; i < allrates.rs_nrates; i++) { |
---|
1060 | mword = ieee80211_rate2media(ic, allrates.rs_rates[i], |
---|
1061 | IEEE80211_MODE_AUTO); |
---|
1062 | if (mword == 0) |
---|
1063 | continue; |
---|
1064 | /* NB: remove media options from mword */ |
---|
1065 | addmedia(media, caps, addsta, |
---|
1066 | IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); |
---|
1067 | } |
---|
1068 | /* |
---|
1069 | * Add HT/11n media. Note that we do not have enough |
---|
1070 | * bits in the media subtype to express the MCS so we |
---|
1071 | * use a "placeholder" media subtype and any fixed MCS |
---|
1072 | * must be specified with a different mechanism. |
---|
1073 | */ |
---|
1074 | for (; mode <= IEEE80211_MODE_11NG; mode++) { |
---|
1075 | if (isclr(ic->ic_modecaps, mode)) |
---|
1076 | continue; |
---|
1077 | addmedia(media, caps, addsta, mode, IFM_AUTO); |
---|
1078 | addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); |
---|
1079 | } |
---|
1080 | if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || |
---|
1081 | isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { |
---|
1082 | addmedia(media, caps, addsta, |
---|
1083 | IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); |
---|
1084 | i = ic->ic_txstream * 8 - 1; |
---|
1085 | if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && |
---|
1086 | (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) |
---|
1087 | rate = ieee80211_htrates[i].ht40_rate_400ns; |
---|
1088 | else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) |
---|
1089 | rate = ieee80211_htrates[i].ht40_rate_800ns; |
---|
1090 | else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) |
---|
1091 | rate = ieee80211_htrates[i].ht20_rate_400ns; |
---|
1092 | else |
---|
1093 | rate = ieee80211_htrates[i].ht20_rate_800ns; |
---|
1094 | if (rate > maxrate) |
---|
1095 | maxrate = rate; |
---|
1096 | } |
---|
1097 | return maxrate; |
---|
1098 | } |
---|
1099 | |
---|
1100 | void |
---|
1101 | ieee80211_media_init(struct ieee80211com *ic) |
---|
1102 | { |
---|
1103 | struct ifnet *ifp = ic->ic_ifp; |
---|
1104 | int maxrate; |
---|
1105 | |
---|
1106 | /* NB: this works because the structure is initialized to zero */ |
---|
1107 | if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { |
---|
1108 | /* |
---|
1109 | * We are re-initializing the channel list; clear |
---|
1110 | * the existing media state as the media routines |
---|
1111 | * don't suppress duplicates. |
---|
1112 | */ |
---|
1113 | ifmedia_removeall(&ic->ic_media); |
---|
1114 | } |
---|
1115 | ieee80211_chan_init(ic); |
---|
1116 | |
---|
1117 | /* |
---|
1118 | * Recalculate media settings in case new channel list changes |
---|
1119 | * the set of available modes. |
---|
1120 | */ |
---|
1121 | maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, |
---|
1122 | ieee80211com_media_change, ieee80211com_media_status); |
---|
1123 | /* NB: strip explicit mode; we're actually in autoselect */ |
---|
1124 | ifmedia_set(&ic->ic_media, |
---|
1125 | media_status(ic->ic_opmode, ic->ic_curchan) &~ |
---|
1126 | (IFM_MMASK | IFM_IEEE80211_TURBO)); |
---|
1127 | if (maxrate) |
---|
1128 | ifp->if_baudrate = IF_Mbps(maxrate); |
---|
1129 | |
---|
1130 | /* XXX need to propagate new media settings to vap's */ |
---|
1131 | } |
---|
1132 | |
---|
1133 | /* XXX inline or eliminate? */ |
---|
1134 | const struct ieee80211_rateset * |
---|
1135 | ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) |
---|
1136 | { |
---|
1137 | /* XXX does this work for 11ng basic rates? */ |
---|
1138 | return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; |
---|
1139 | } |
---|
1140 | |
---|
1141 | void |
---|
1142 | ieee80211_announce(struct ieee80211com *ic) |
---|
1143 | { |
---|
1144 | struct ifnet *ifp = ic->ic_ifp; |
---|
1145 | int i, rate, mword; |
---|
1146 | enum ieee80211_phymode mode; |
---|
1147 | const struct ieee80211_rateset *rs; |
---|
1148 | |
---|
1149 | /* NB: skip AUTO since it has no rates */ |
---|
1150 | for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { |
---|
1151 | if (isclr(ic->ic_modecaps, mode)) |
---|
1152 | continue; |
---|
1153 | if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); |
---|
1154 | rs = &ic->ic_sup_rates[mode]; |
---|
1155 | for (i = 0; i < rs->rs_nrates; i++) { |
---|
1156 | mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); |
---|
1157 | if (mword == 0) |
---|
1158 | continue; |
---|
1159 | rate = ieee80211_media2rate(mword); |
---|
1160 | printf("%s%d%sMbps", (i != 0 ? " " : ""), |
---|
1161 | rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); |
---|
1162 | } |
---|
1163 | printf("\n"); |
---|
1164 | } |
---|
1165 | ieee80211_ht_announce(ic); |
---|
1166 | } |
---|
1167 | |
---|
1168 | void |
---|
1169 | ieee80211_announce_channels(struct ieee80211com *ic) |
---|
1170 | { |
---|
1171 | const struct ieee80211_channel *c; |
---|
1172 | char type; |
---|
1173 | int i, cw; |
---|
1174 | |
---|
1175 | printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); |
---|
1176 | for (i = 0; i < ic->ic_nchans; i++) { |
---|
1177 | c = &ic->ic_channels[i]; |
---|
1178 | if (IEEE80211_IS_CHAN_ST(c)) |
---|
1179 | type = 'S'; |
---|
1180 | else if (IEEE80211_IS_CHAN_108A(c)) |
---|
1181 | type = 'T'; |
---|
1182 | else if (IEEE80211_IS_CHAN_108G(c)) |
---|
1183 | type = 'G'; |
---|
1184 | else if (IEEE80211_IS_CHAN_HT(c)) |
---|
1185 | type = 'n'; |
---|
1186 | else if (IEEE80211_IS_CHAN_A(c)) |
---|
1187 | type = 'a'; |
---|
1188 | else if (IEEE80211_IS_CHAN_ANYG(c)) |
---|
1189 | type = 'g'; |
---|
1190 | else if (IEEE80211_IS_CHAN_B(c)) |
---|
1191 | type = 'b'; |
---|
1192 | else |
---|
1193 | type = 'f'; |
---|
1194 | if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) |
---|
1195 | cw = 40; |
---|
1196 | else if (IEEE80211_IS_CHAN_HALF(c)) |
---|
1197 | cw = 10; |
---|
1198 | else if (IEEE80211_IS_CHAN_QUARTER(c)) |
---|
1199 | cw = 5; |
---|
1200 | else |
---|
1201 | cw = 20; |
---|
1202 | printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" |
---|
1203 | , c->ic_ieee, c->ic_freq, type |
---|
1204 | , cw |
---|
1205 | , IEEE80211_IS_CHAN_HT40U(c) ? '+' : |
---|
1206 | IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' |
---|
1207 | , c->ic_maxregpower |
---|
1208 | , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 |
---|
1209 | , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 |
---|
1210 | ); |
---|
1211 | } |
---|
1212 | } |
---|
1213 | |
---|
1214 | static int |
---|
1215 | media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) |
---|
1216 | { |
---|
1217 | switch (IFM_MODE(ime->ifm_media)) { |
---|
1218 | case IFM_IEEE80211_11A: |
---|
1219 | *mode = IEEE80211_MODE_11A; |
---|
1220 | break; |
---|
1221 | case IFM_IEEE80211_11B: |
---|
1222 | *mode = IEEE80211_MODE_11B; |
---|
1223 | break; |
---|
1224 | case IFM_IEEE80211_11G: |
---|
1225 | *mode = IEEE80211_MODE_11G; |
---|
1226 | break; |
---|
1227 | case IFM_IEEE80211_FH: |
---|
1228 | *mode = IEEE80211_MODE_FH; |
---|
1229 | break; |
---|
1230 | case IFM_IEEE80211_11NA: |
---|
1231 | *mode = IEEE80211_MODE_11NA; |
---|
1232 | break; |
---|
1233 | case IFM_IEEE80211_11NG: |
---|
1234 | *mode = IEEE80211_MODE_11NG; |
---|
1235 | break; |
---|
1236 | case IFM_AUTO: |
---|
1237 | *mode = IEEE80211_MODE_AUTO; |
---|
1238 | break; |
---|
1239 | default: |
---|
1240 | return 0; |
---|
1241 | } |
---|
1242 | /* |
---|
1243 | * Turbo mode is an ``option''. |
---|
1244 | * XXX does not apply to AUTO |
---|
1245 | */ |
---|
1246 | if (ime->ifm_media & IFM_IEEE80211_TURBO) { |
---|
1247 | if (*mode == IEEE80211_MODE_11A) { |
---|
1248 | if (flags & IEEE80211_F_TURBOP) |
---|
1249 | *mode = IEEE80211_MODE_TURBO_A; |
---|
1250 | else |
---|
1251 | *mode = IEEE80211_MODE_STURBO_A; |
---|
1252 | } else if (*mode == IEEE80211_MODE_11G) |
---|
1253 | *mode = IEEE80211_MODE_TURBO_G; |
---|
1254 | else |
---|
1255 | return 0; |
---|
1256 | } |
---|
1257 | /* XXX HT40 +/- */ |
---|
1258 | return 1; |
---|
1259 | } |
---|
1260 | |
---|
1261 | /* |
---|
1262 | * Handle a media change request on the underlying interface. |
---|
1263 | */ |
---|
1264 | int |
---|
1265 | ieee80211com_media_change(struct ifnet *ifp) |
---|
1266 | { |
---|
1267 | return EINVAL; |
---|
1268 | } |
---|
1269 | |
---|
1270 | /* |
---|
1271 | * Handle a media change request on the vap interface. |
---|
1272 | */ |
---|
1273 | int |
---|
1274 | ieee80211_media_change(struct ifnet *ifp) |
---|
1275 | { |
---|
1276 | struct ieee80211vap *vap = ifp->if_softc; |
---|
1277 | struct ifmedia_entry *ime = vap->iv_media.ifm_cur; |
---|
1278 | uint16_t newmode; |
---|
1279 | |
---|
1280 | if (!media2mode(ime, vap->iv_flags, &newmode)) |
---|
1281 | return EINVAL; |
---|
1282 | if (vap->iv_des_mode != newmode) { |
---|
1283 | vap->iv_des_mode = newmode; |
---|
1284 | /* XXX kick state machine if up+running */ |
---|
1285 | } |
---|
1286 | return 0; |
---|
1287 | } |
---|
1288 | |
---|
1289 | /* |
---|
1290 | * Common code to calculate the media status word |
---|
1291 | * from the operating mode and channel state. |
---|
1292 | */ |
---|
1293 | static int |
---|
1294 | media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) |
---|
1295 | { |
---|
1296 | int status; |
---|
1297 | |
---|
1298 | status = IFM_IEEE80211; |
---|
1299 | switch (opmode) { |
---|
1300 | case IEEE80211_M_STA: |
---|
1301 | break; |
---|
1302 | case IEEE80211_M_IBSS: |
---|
1303 | status |= IFM_IEEE80211_ADHOC; |
---|
1304 | break; |
---|
1305 | case IEEE80211_M_HOSTAP: |
---|
1306 | status |= IFM_IEEE80211_HOSTAP; |
---|
1307 | break; |
---|
1308 | case IEEE80211_M_MONITOR: |
---|
1309 | status |= IFM_IEEE80211_MONITOR; |
---|
1310 | break; |
---|
1311 | case IEEE80211_M_AHDEMO: |
---|
1312 | status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; |
---|
1313 | break; |
---|
1314 | case IEEE80211_M_WDS: |
---|
1315 | status |= IFM_IEEE80211_WDS; |
---|
1316 | break; |
---|
1317 | case IEEE80211_M_MBSS: |
---|
1318 | status |= IFM_IEEE80211_MBSS; |
---|
1319 | break; |
---|
1320 | } |
---|
1321 | if (IEEE80211_IS_CHAN_HTA(chan)) { |
---|
1322 | status |= IFM_IEEE80211_11NA; |
---|
1323 | } else if (IEEE80211_IS_CHAN_HTG(chan)) { |
---|
1324 | status |= IFM_IEEE80211_11NG; |
---|
1325 | } else if (IEEE80211_IS_CHAN_A(chan)) { |
---|
1326 | status |= IFM_IEEE80211_11A; |
---|
1327 | } else if (IEEE80211_IS_CHAN_B(chan)) { |
---|
1328 | status |= IFM_IEEE80211_11B; |
---|
1329 | } else if (IEEE80211_IS_CHAN_ANYG(chan)) { |
---|
1330 | status |= IFM_IEEE80211_11G; |
---|
1331 | } else if (IEEE80211_IS_CHAN_FHSS(chan)) { |
---|
1332 | status |= IFM_IEEE80211_FH; |
---|
1333 | } |
---|
1334 | /* XXX else complain? */ |
---|
1335 | |
---|
1336 | if (IEEE80211_IS_CHAN_TURBO(chan)) |
---|
1337 | status |= IFM_IEEE80211_TURBO; |
---|
1338 | #if 0 |
---|
1339 | if (IEEE80211_IS_CHAN_HT20(chan)) |
---|
1340 | status |= IFM_IEEE80211_HT20; |
---|
1341 | if (IEEE80211_IS_CHAN_HT40(chan)) |
---|
1342 | status |= IFM_IEEE80211_HT40; |
---|
1343 | #endif |
---|
1344 | return status; |
---|
1345 | } |
---|
1346 | |
---|
1347 | static void |
---|
1348 | ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) |
---|
1349 | { |
---|
1350 | struct ieee80211com *ic = ifp->if_l2com; |
---|
1351 | struct ieee80211vap *vap; |
---|
1352 | |
---|
1353 | imr->ifm_status = IFM_AVALID; |
---|
1354 | TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) |
---|
1355 | if (vap->iv_ifp->if_flags & IFF_UP) { |
---|
1356 | imr->ifm_status |= IFM_ACTIVE; |
---|
1357 | break; |
---|
1358 | } |
---|
1359 | imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); |
---|
1360 | if (imr->ifm_status & IFM_ACTIVE) |
---|
1361 | imr->ifm_current = imr->ifm_active; |
---|
1362 | } |
---|
1363 | |
---|
1364 | void |
---|
1365 | ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) |
---|
1366 | { |
---|
1367 | struct ieee80211vap *vap = ifp->if_softc; |
---|
1368 | struct ieee80211com *ic = vap->iv_ic; |
---|
1369 | enum ieee80211_phymode mode; |
---|
1370 | |
---|
1371 | imr->ifm_status = IFM_AVALID; |
---|
1372 | /* |
---|
1373 | * NB: use the current channel's mode to lock down a xmit |
---|
1374 | * rate only when running; otherwise we may have a mismatch |
---|
1375 | * in which case the rate will not be convertible. |
---|
1376 | */ |
---|
1377 | if (vap->iv_state == IEEE80211_S_RUN) { |
---|
1378 | imr->ifm_status |= IFM_ACTIVE; |
---|
1379 | mode = ieee80211_chan2mode(ic->ic_curchan); |
---|
1380 | } else |
---|
1381 | mode = IEEE80211_MODE_AUTO; |
---|
1382 | imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); |
---|
1383 | /* |
---|
1384 | * Calculate a current rate if possible. |
---|
1385 | */ |
---|
1386 | if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { |
---|
1387 | /* |
---|
1388 | * A fixed rate is set, report that. |
---|
1389 | */ |
---|
1390 | imr->ifm_active |= ieee80211_rate2media(ic, |
---|
1391 | vap->iv_txparms[mode].ucastrate, mode); |
---|
1392 | } else if (vap->iv_opmode == IEEE80211_M_STA) { |
---|
1393 | /* |
---|
1394 | * In station mode report the current transmit rate. |
---|
1395 | */ |
---|
1396 | imr->ifm_active |= ieee80211_rate2media(ic, |
---|
1397 | vap->iv_bss->ni_txrate, mode); |
---|
1398 | } else |
---|
1399 | imr->ifm_active |= IFM_AUTO; |
---|
1400 | if (imr->ifm_status & IFM_ACTIVE) |
---|
1401 | imr->ifm_current = imr->ifm_active; |
---|
1402 | } |
---|
1403 | |
---|
1404 | /* |
---|
1405 | * Set the current phy mode and recalculate the active channel |
---|
1406 | * set based on the available channels for this mode. Also |
---|
1407 | * select a new default/current channel if the current one is |
---|
1408 | * inappropriate for this mode. |
---|
1409 | */ |
---|
1410 | int |
---|
1411 | ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) |
---|
1412 | { |
---|
1413 | /* |
---|
1414 | * Adjust basic rates in 11b/11g supported rate set. |
---|
1415 | * Note that if operating on a hal/quarter rate channel |
---|
1416 | * this is a noop as those rates sets are different |
---|
1417 | * and used instead. |
---|
1418 | */ |
---|
1419 | if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) |
---|
1420 | ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); |
---|
1421 | |
---|
1422 | ic->ic_curmode = mode; |
---|
1423 | ieee80211_reset_erp(ic); /* reset ERP state */ |
---|
1424 | |
---|
1425 | return 0; |
---|
1426 | } |
---|
1427 | |
---|
1428 | /* |
---|
1429 | * Return the phy mode for with the specified channel. |
---|
1430 | */ |
---|
1431 | enum ieee80211_phymode |
---|
1432 | ieee80211_chan2mode(const struct ieee80211_channel *chan) |
---|
1433 | { |
---|
1434 | |
---|
1435 | if (IEEE80211_IS_CHAN_HTA(chan)) |
---|
1436 | return IEEE80211_MODE_11NA; |
---|
1437 | else if (IEEE80211_IS_CHAN_HTG(chan)) |
---|
1438 | return IEEE80211_MODE_11NG; |
---|
1439 | else if (IEEE80211_IS_CHAN_108G(chan)) |
---|
1440 | return IEEE80211_MODE_TURBO_G; |
---|
1441 | else if (IEEE80211_IS_CHAN_ST(chan)) |
---|
1442 | return IEEE80211_MODE_STURBO_A; |
---|
1443 | else if (IEEE80211_IS_CHAN_TURBO(chan)) |
---|
1444 | return IEEE80211_MODE_TURBO_A; |
---|
1445 | else if (IEEE80211_IS_CHAN_HALF(chan)) |
---|
1446 | return IEEE80211_MODE_HALF; |
---|
1447 | else if (IEEE80211_IS_CHAN_QUARTER(chan)) |
---|
1448 | return IEEE80211_MODE_QUARTER; |
---|
1449 | else if (IEEE80211_IS_CHAN_A(chan)) |
---|
1450 | return IEEE80211_MODE_11A; |
---|
1451 | else if (IEEE80211_IS_CHAN_ANYG(chan)) |
---|
1452 | return IEEE80211_MODE_11G; |
---|
1453 | else if (IEEE80211_IS_CHAN_B(chan)) |
---|
1454 | return IEEE80211_MODE_11B; |
---|
1455 | else if (IEEE80211_IS_CHAN_FHSS(chan)) |
---|
1456 | return IEEE80211_MODE_FH; |
---|
1457 | |
---|
1458 | /* NB: should not get here */ |
---|
1459 | printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", |
---|
1460 | __func__, chan->ic_freq, chan->ic_flags); |
---|
1461 | return IEEE80211_MODE_11B; |
---|
1462 | } |
---|
1463 | |
---|
1464 | struct ratemedia { |
---|
1465 | u_int match; /* rate + mode */ |
---|
1466 | u_int media; /* if_media rate */ |
---|
1467 | }; |
---|
1468 | |
---|
1469 | static int |
---|
1470 | findmedia(const struct ratemedia rates[], int n, u_int match) |
---|
1471 | { |
---|
1472 | int i; |
---|
1473 | |
---|
1474 | for (i = 0; i < n; i++) |
---|
1475 | if (rates[i].match == match) |
---|
1476 | return rates[i].media; |
---|
1477 | return IFM_AUTO; |
---|
1478 | } |
---|
1479 | |
---|
1480 | /* |
---|
1481 | * Convert IEEE80211 rate value to ifmedia subtype. |
---|
1482 | * Rate is either a legacy rate in units of 0.5Mbps |
---|
1483 | * or an MCS index. |
---|
1484 | */ |
---|
1485 | int |
---|
1486 | ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) |
---|
1487 | { |
---|
1488 | #define N(a) (sizeof(a) / sizeof(a[0])) |
---|
1489 | static const struct ratemedia rates[] = { |
---|
1490 | { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, |
---|
1491 | { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, |
---|
1492 | { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, |
---|
1493 | { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, |
---|
1494 | { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, |
---|
1495 | { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, |
---|
1496 | { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, |
---|
1497 | { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, |
---|
1498 | { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, |
---|
1499 | { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, |
---|
1500 | { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, |
---|
1501 | { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, |
---|
1502 | { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, |
---|
1503 | { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, |
---|
1504 | { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, |
---|
1505 | { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, |
---|
1506 | { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, |
---|
1507 | { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, |
---|
1508 | { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, |
---|
1509 | { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, |
---|
1510 | { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, |
---|
1511 | { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, |
---|
1512 | { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, |
---|
1513 | { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, |
---|
1514 | { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, |
---|
1515 | { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, |
---|
1516 | { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, |
---|
1517 | { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, |
---|
1518 | { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, |
---|
1519 | { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, |
---|
1520 | /* NB: OFDM72 doesn't realy exist so we don't handle it */ |
---|
1521 | }; |
---|
1522 | static const struct ratemedia htrates[] = { |
---|
1523 | { 0, IFM_IEEE80211_MCS }, |
---|
1524 | { 1, IFM_IEEE80211_MCS }, |
---|
1525 | { 2, IFM_IEEE80211_MCS }, |
---|
1526 | { 3, IFM_IEEE80211_MCS }, |
---|
1527 | { 4, IFM_IEEE80211_MCS }, |
---|
1528 | { 5, IFM_IEEE80211_MCS }, |
---|
1529 | { 6, IFM_IEEE80211_MCS }, |
---|
1530 | { 7, IFM_IEEE80211_MCS }, |
---|
1531 | { 8, IFM_IEEE80211_MCS }, |
---|
1532 | { 9, IFM_IEEE80211_MCS }, |
---|
1533 | { 10, IFM_IEEE80211_MCS }, |
---|
1534 | { 11, IFM_IEEE80211_MCS }, |
---|
1535 | { 12, IFM_IEEE80211_MCS }, |
---|
1536 | { 13, IFM_IEEE80211_MCS }, |
---|
1537 | { 14, IFM_IEEE80211_MCS }, |
---|
1538 | { 15, IFM_IEEE80211_MCS }, |
---|
1539 | { 16, IFM_IEEE80211_MCS }, |
---|
1540 | { 17, IFM_IEEE80211_MCS }, |
---|
1541 | { 18, IFM_IEEE80211_MCS }, |
---|
1542 | { 19, IFM_IEEE80211_MCS }, |
---|
1543 | { 20, IFM_IEEE80211_MCS }, |
---|
1544 | { 21, IFM_IEEE80211_MCS }, |
---|
1545 | { 22, IFM_IEEE80211_MCS }, |
---|
1546 | { 23, IFM_IEEE80211_MCS }, |
---|
1547 | { 24, IFM_IEEE80211_MCS }, |
---|
1548 | { 25, IFM_IEEE80211_MCS }, |
---|
1549 | { 26, IFM_IEEE80211_MCS }, |
---|
1550 | { 27, IFM_IEEE80211_MCS }, |
---|
1551 | { 28, IFM_IEEE80211_MCS }, |
---|
1552 | { 29, IFM_IEEE80211_MCS }, |
---|
1553 | { 30, IFM_IEEE80211_MCS }, |
---|
1554 | { 31, IFM_IEEE80211_MCS }, |
---|
1555 | { 32, IFM_IEEE80211_MCS }, |
---|
1556 | { 33, IFM_IEEE80211_MCS }, |
---|
1557 | { 34, IFM_IEEE80211_MCS }, |
---|
1558 | { 35, IFM_IEEE80211_MCS }, |
---|
1559 | { 36, IFM_IEEE80211_MCS }, |
---|
1560 | { 37, IFM_IEEE80211_MCS }, |
---|
1561 | { 38, IFM_IEEE80211_MCS }, |
---|
1562 | { 39, IFM_IEEE80211_MCS }, |
---|
1563 | { 40, IFM_IEEE80211_MCS }, |
---|
1564 | { 41, IFM_IEEE80211_MCS }, |
---|
1565 | { 42, IFM_IEEE80211_MCS }, |
---|
1566 | { 43, IFM_IEEE80211_MCS }, |
---|
1567 | { 44, IFM_IEEE80211_MCS }, |
---|
1568 | { 45, IFM_IEEE80211_MCS }, |
---|
1569 | { 46, IFM_IEEE80211_MCS }, |
---|
1570 | { 47, IFM_IEEE80211_MCS }, |
---|
1571 | { 48, IFM_IEEE80211_MCS }, |
---|
1572 | { 49, IFM_IEEE80211_MCS }, |
---|
1573 | { 50, IFM_IEEE80211_MCS }, |
---|
1574 | { 51, IFM_IEEE80211_MCS }, |
---|
1575 | { 52, IFM_IEEE80211_MCS }, |
---|
1576 | { 53, IFM_IEEE80211_MCS }, |
---|
1577 | { 54, IFM_IEEE80211_MCS }, |
---|
1578 | { 55, IFM_IEEE80211_MCS }, |
---|
1579 | { 56, IFM_IEEE80211_MCS }, |
---|
1580 | { 57, IFM_IEEE80211_MCS }, |
---|
1581 | { 58, IFM_IEEE80211_MCS }, |
---|
1582 | { 59, IFM_IEEE80211_MCS }, |
---|
1583 | { 60, IFM_IEEE80211_MCS }, |
---|
1584 | { 61, IFM_IEEE80211_MCS }, |
---|
1585 | { 62, IFM_IEEE80211_MCS }, |
---|
1586 | { 63, IFM_IEEE80211_MCS }, |
---|
1587 | { 64, IFM_IEEE80211_MCS }, |
---|
1588 | { 65, IFM_IEEE80211_MCS }, |
---|
1589 | { 66, IFM_IEEE80211_MCS }, |
---|
1590 | { 67, IFM_IEEE80211_MCS }, |
---|
1591 | { 68, IFM_IEEE80211_MCS }, |
---|
1592 | { 69, IFM_IEEE80211_MCS }, |
---|
1593 | { 70, IFM_IEEE80211_MCS }, |
---|
1594 | { 71, IFM_IEEE80211_MCS }, |
---|
1595 | { 72, IFM_IEEE80211_MCS }, |
---|
1596 | { 73, IFM_IEEE80211_MCS }, |
---|
1597 | { 74, IFM_IEEE80211_MCS }, |
---|
1598 | { 75, IFM_IEEE80211_MCS }, |
---|
1599 | { 76, IFM_IEEE80211_MCS }, |
---|
1600 | }; |
---|
1601 | int m; |
---|
1602 | |
---|
1603 | /* |
---|
1604 | * Check 11n rates first for match as an MCS. |
---|
1605 | */ |
---|
1606 | if (mode == IEEE80211_MODE_11NA) { |
---|
1607 | if (rate & IEEE80211_RATE_MCS) { |
---|
1608 | rate &= ~IEEE80211_RATE_MCS; |
---|
1609 | m = findmedia(htrates, N(htrates), rate); |
---|
1610 | if (m != IFM_AUTO) |
---|
1611 | return m | IFM_IEEE80211_11NA; |
---|
1612 | } |
---|
1613 | } else if (mode == IEEE80211_MODE_11NG) { |
---|
1614 | /* NB: 12 is ambiguous, it will be treated as an MCS */ |
---|
1615 | if (rate & IEEE80211_RATE_MCS) { |
---|
1616 | rate &= ~IEEE80211_RATE_MCS; |
---|
1617 | m = findmedia(htrates, N(htrates), rate); |
---|
1618 | if (m != IFM_AUTO) |
---|
1619 | return m | IFM_IEEE80211_11NG; |
---|
1620 | } |
---|
1621 | } |
---|
1622 | rate &= IEEE80211_RATE_VAL; |
---|
1623 | switch (mode) { |
---|
1624 | case IEEE80211_MODE_11A: |
---|
1625 | case IEEE80211_MODE_HALF: /* XXX good 'nuf */ |
---|
1626 | case IEEE80211_MODE_QUARTER: |
---|
1627 | case IEEE80211_MODE_11NA: |
---|
1628 | case IEEE80211_MODE_TURBO_A: |
---|
1629 | case IEEE80211_MODE_STURBO_A: |
---|
1630 | return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); |
---|
1631 | case IEEE80211_MODE_11B: |
---|
1632 | return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); |
---|
1633 | case IEEE80211_MODE_FH: |
---|
1634 | return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); |
---|
1635 | case IEEE80211_MODE_AUTO: |
---|
1636 | /* NB: ic may be NULL for some drivers */ |
---|
1637 | if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) |
---|
1638 | return findmedia(rates, N(rates), |
---|
1639 | rate | IFM_IEEE80211_FH); |
---|
1640 | /* NB: hack, 11g matches both 11b+11a rates */ |
---|
1641 | /* fall thru... */ |
---|
1642 | case IEEE80211_MODE_11G: |
---|
1643 | case IEEE80211_MODE_11NG: |
---|
1644 | case IEEE80211_MODE_TURBO_G: |
---|
1645 | return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); |
---|
1646 | } |
---|
1647 | return IFM_AUTO; |
---|
1648 | #undef N |
---|
1649 | } |
---|
1650 | |
---|
1651 | int |
---|
1652 | ieee80211_media2rate(int mword) |
---|
1653 | { |
---|
1654 | #define N(a) (sizeof(a) / sizeof(a[0])) |
---|
1655 | static const int ieeerates[] = { |
---|
1656 | -1, /* IFM_AUTO */ |
---|
1657 | 0, /* IFM_MANUAL */ |
---|
1658 | 0, /* IFM_NONE */ |
---|
1659 | 2, /* IFM_IEEE80211_FH1 */ |
---|
1660 | 4, /* IFM_IEEE80211_FH2 */ |
---|
1661 | 2, /* IFM_IEEE80211_DS1 */ |
---|
1662 | 4, /* IFM_IEEE80211_DS2 */ |
---|
1663 | 11, /* IFM_IEEE80211_DS5 */ |
---|
1664 | 22, /* IFM_IEEE80211_DS11 */ |
---|
1665 | 44, /* IFM_IEEE80211_DS22 */ |
---|
1666 | 12, /* IFM_IEEE80211_OFDM6 */ |
---|
1667 | 18, /* IFM_IEEE80211_OFDM9 */ |
---|
1668 | 24, /* IFM_IEEE80211_OFDM12 */ |
---|
1669 | 36, /* IFM_IEEE80211_OFDM18 */ |
---|
1670 | 48, /* IFM_IEEE80211_OFDM24 */ |
---|
1671 | 72, /* IFM_IEEE80211_OFDM36 */ |
---|
1672 | 96, /* IFM_IEEE80211_OFDM48 */ |
---|
1673 | 108, /* IFM_IEEE80211_OFDM54 */ |
---|
1674 | 144, /* IFM_IEEE80211_OFDM72 */ |
---|
1675 | 0, /* IFM_IEEE80211_DS354k */ |
---|
1676 | 0, /* IFM_IEEE80211_DS512k */ |
---|
1677 | 6, /* IFM_IEEE80211_OFDM3 */ |
---|
1678 | 9, /* IFM_IEEE80211_OFDM4 */ |
---|
1679 | 54, /* IFM_IEEE80211_OFDM27 */ |
---|
1680 | -1, /* IFM_IEEE80211_MCS */ |
---|
1681 | }; |
---|
1682 | return IFM_SUBTYPE(mword) < N(ieeerates) ? |
---|
1683 | ieeerates[IFM_SUBTYPE(mword)] : 0; |
---|
1684 | #undef N |
---|
1685 | } |
---|
1686 | |
---|
1687 | /* |
---|
1688 | * The following hash function is adapted from "Hash Functions" by Bob Jenkins |
---|
1689 | * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). |
---|
1690 | */ |
---|
1691 | #define mix(a, b, c) \ |
---|
1692 | do { \ |
---|
1693 | a -= b; a -= c; a ^= (c >> 13); \ |
---|
1694 | b -= c; b -= a; b ^= (a << 8); \ |
---|
1695 | c -= a; c -= b; c ^= (b >> 13); \ |
---|
1696 | a -= b; a -= c; a ^= (c >> 12); \ |
---|
1697 | b -= c; b -= a; b ^= (a << 16); \ |
---|
1698 | c -= a; c -= b; c ^= (b >> 5); \ |
---|
1699 | a -= b; a -= c; a ^= (c >> 3); \ |
---|
1700 | b -= c; b -= a; b ^= (a << 10); \ |
---|
1701 | c -= a; c -= b; c ^= (b >> 15); \ |
---|
1702 | } while (/*CONSTCOND*/0) |
---|
1703 | |
---|
1704 | uint32_t |
---|
1705 | ieee80211_mac_hash(const struct ieee80211com *ic, |
---|
1706 | const uint8_t addr[IEEE80211_ADDR_LEN]) |
---|
1707 | { |
---|
1708 | uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; |
---|
1709 | |
---|
1710 | b += addr[5] << 8; |
---|
1711 | b += addr[4]; |
---|
1712 | a += addr[3] << 24; |
---|
1713 | a += addr[2] << 16; |
---|
1714 | a += addr[1] << 8; |
---|
1715 | a += addr[0]; |
---|
1716 | |
---|
1717 | mix(a, b, c); |
---|
1718 | |
---|
1719 | return c; |
---|
1720 | } |
---|
1721 | #undef mix |
---|