Wireless autoconf » Historial » Versió 15
Pau Escrich, 13-06-2011 18:30
1 | 1 | Pau Escrich | h1. Wireless autoconf |
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3 | 13 | Pau Escrich | h2. The UCI configuration |
4 | 10 | Pau Escrich | |
5 | 15 | Pau Escrich | Inside /etc/config/qmp you can find some options related to wireless interfaes |
6 | 1 | Pau Escrich | |
7 | These are the default parameters sharing all wireless interfaces |
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8 | 4 | Pau Escrich | <pre> |
9 | config 'qmp' 'wireless' |
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10 | 3 | Pau Escrich | option 'driver' 'mac80211' |
11 | option 'country' 'UZ' |
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12 | 1 | Pau Escrich | option 'bssid' '02:CA:FF:EE:BA:BE' |
13 | 4 | Pau Escrich | </pre> |
14 | 3 | Pau Escrich | |
15 | 1 | Pau Escrich | driver can be `mac80211` for athXk, and `madwifi` for madwifi |
16 | 2 | Pau Escrich | |
17 | And these are the config parameters for each wifi interface. |
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18 | 3 | Pau Escrich | <pre> |
19 | config 'wireless' |
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20 | option 'channel' '44' |
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21 | option 'mode' 'adhoc' |
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22 | option 'name' 'qmp' |
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23 | option 'mac' '00:80:48:6b:25:b5' |
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24 | |||
25 | config 'wireless' |
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26 | option 'channel' '10' |
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27 | option 'mode' 'ap' |
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28 | option 'name' 'qmp.cat-AP' |
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29 | option 'mac' '00:80:48:6b:25:b6' |
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30 | |||
31 | </pre> |
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32 | 5 | Pau Escrich | |
33 | 13 | Pau Escrich | h2. qmp_wireless_config |
34 | 9 | Pau Escrich | |
35 | 5 | Pau Escrich | To apply this configuration to device, you must execute this commands: |
36 | <pre> |
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37 | . /etc/qmp/qmp_wireless.sh |
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38 | qmp_configure_wifi |
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39 | </pre> |
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40 | This function takes the parameters from UCI and using the templates from: /etc/qmp/templates creates the openwrt wireless config |
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41 | Templates are named like that: wireless.mac80211.adhoc wireless.madwifi.ap |
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42 | Separed by dots, second name is the driver to use and third one is the mode. |
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43 | |||
44 | These templates looks like this: |
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45 | |||
46 | <pre> |
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47 | config wifi-device #QMP_DEVICE |
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48 | option type mac80211 |
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49 | option macaddr #QMP_MAC |
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50 | option channel #QMP_CHANNEL |
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51 | option diversity 0 # 0:off, 1:on |
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52 | option txantenna 0 # 0:auto, 1:main, 2:aux |
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53 | option rxantenna 0 # 0:auto, 1:main, 2:aux |
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54 | option country #QMP_COUNTRY |
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55 | option outdoor 1 |
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56 | # option txpower 1 |
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57 | |||
58 | config wifi-iface |
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59 | option device #QMP_DEVICE |
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60 | option mode adhoc |
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61 | option ssid #QMP_SSID |
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62 | option bssid #QMP_BSSID |
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63 | option encryption none |
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64 | </pre> |
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65 | 12 | Pau Escrich | As you can see, the special words starting with #QMP will be replaced by UCI parameters. |
66 | 5 | Pau Escrich | So you can play a little with templates. For example, there is a template named: `wireless.mac80211.adhoc-n` |
67 | 9 | Pau Escrich | |
68 | But the function qmp_wireless_config requires a complete configuration from UCI. So there is another function to generate the UCI config. |
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69 | |||
70 | 13 | Pau Escrich | h2. qmp_wireless_config_initial |
71 | 9 | Pau Escrich | |
72 | To execute this function: |
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73 | <pre> |
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74 | . /etc/qmp/qmp_wireless.sh |
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75 | qmp_configure_wifi_initial |
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76 | </pre> |
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77 | |||
78 | This generates de UCI qmp configuration, but not allways from zero. You can have some parameters configured and the function will configure the rest for you. |
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79 | |||
80 | For example, you can have a configuration like this: |
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81 | <pre> |
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82 | config 'wireless' |
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83 | option 'channel' '132' |
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84 | option 'mode' 'adhoc' |
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85 | </pre> |
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86 | |||
87 | And after execute qmp_configure_wifi_initial you will have the rest of needed parameters |
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88 | <pre> |
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89 | config 'wireless' |
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90 | option 'channel' '132' |
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91 | option 'mode' 'adhoc' |
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92 | option 'name' 'qmp' |
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93 | option 'mac' '00:80:48:6b:25:b5' |
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94 | </pre> |
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95 | |||
96 | So, if you want to use the first device for meshing and the second one for access point, you can build the openwrt image with this kind of configuration: |
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97 | |||
98 | <pre> |
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99 | config 'wireless' |
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100 | option 'mode' 'adhoc' |
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101 | |||
102 | config 'wireless' |
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103 | option 'mode' 'ap' |
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104 | </pre> |
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105 | |||
106 | And after the first startup qmp_configure_wifi_initial will be executed putting the rest of parameters. |
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107 | |||
108 | The default configuration is read from file: /etc/qmp/templates/wireless.default.config looks like that: |
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109 | <pre> |
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110 | driver mac80211 |
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111 | country UZ |
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112 | bssid 02:CA:FF:EE:BA:BE |
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113 | channel 44 |
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114 | mode adhoc |
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115 | name qmp.cat |
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116 | 1 | Pau Escrich | </pre> |
117 | |||
118 | Also if the `mac` option is specified, the function will find this device that has this mac-address and use it. If not, it will use the first one free |
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119 | 13 | Pau Escrich | |
120 | h2. /etc/init.d/qmp_autoconf |
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121 | 14 | Pau Escrich | |
122 | 13 | Pau Escrich | This file is executed during first boot. It uses qmp_configure_wifi_initial and qmp_configure_wifi to leave wireless system ready. |
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124 | If you want to reconfigure wireless system after first boot, you have to remove a control file named `/qmp_configured` |
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125 | |||
126 | This script also executes the networking autoconfiguration (bmx6, olsr6...) |