Editing N900 Ad-hoc WiFi Hotspot

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== Working solution ==
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This method works but is not useable for more than a proof of concept because it suffers '''40% packet loss at close range''' between the N900 and the laptop.
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See http://talk.maemo.org/showthread.php?t=73406
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It may be noted, that scanning for networks on the N900 seems to disconnect everything. So starting wlancond seems to be a bad solution, better stop it.
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== Old article ==
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This method works but is not usable for more than a proof of concept because it suffers '''40% packet loss at close range''' between the [[Nokia N900|N900]] and the laptop.
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== On the N900 ==
== On the N900 ==
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/etc/apt/sources.list
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<ol>
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deb http://repository.maemo.org/extras-devel/ fremantle free
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<li>[[Extras-devel#How to activate Extras-devel|Enable extras-devel]]</li>
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apt-get install iptables
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<li>Install [http://maemo.org/packages/view/iptables/ iptables] at a [[terminal]] with [[root access]]:<pre>apt-get install iptables</pre></li>
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http://wiki.maemo.org/Kernel_Power#Installation_of_the_stable_kernel_from_extras
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<li>Install [http://maemo.org/packages/view/kernel-power-settings/ kernel-power-settings] (see [[Kernel_Power#Installation_of_the_stable_kernel_from_extras|the detailed installation instructions]]):<pre>apt-get install kernel-power-settings</pre></li>
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apt-get install kernel-power-settings
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<li>Connect to the Internet with GPRS</li>
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# connect using GPRS and not a wifi hotspot
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<li>Setup iptables to allow forwarding:
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echo 1 > /proc/sys/net/ipv4/ip_forward
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<pre>
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iptables -t nat -A POSTROUTING -o gprs0 -j MASQUERADE
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echo 1 > /proc/sys/net/ipv4/ip_forward
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iwconfig wlan0 mode ad-hoc channel 3
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iptables -t nat -A POSTROUTING -o gprs0 -j MASQUERADE
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ifconfig wlan0 192.168.4.15 up
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</pre></li>
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iwconfig wlan0 essid N900
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<li>Bring up te ad hoc wireless network:
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== On the laptop ==
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<pre>
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sudo iwconfig wlan0 mode ad-hoc channel 3
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iwconfig wlan0 mode ad-hoc channel 3
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sudo ifconfig wlan0 192.168.4.14 up
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ifconfig wlan0 192.168.4.15 up
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sudo iwconfig essid N900
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iwconfig wlan0 essid N900
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sudo route add default gw 192.168.4.15
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</pre></li>
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</ol>
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== On the Client ==
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Simply connect to the ad hoc wireless network.
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In this configuration, a DHCP server is not run by the N900, so addresses will have to be manually assigned to clients.
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Note that on Android devices, a patched "wpa_supplicant" file may be necessary to see the network.
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[[Category:Connectivity]]
[[Category:Connectivity]]
[[Category:N900]]
[[Category:N900]]
[[Category:Power users]]
[[Category:Power users]]
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[[Category:WiFi]]
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[[Category:Hotspot]]

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