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Install on OpenWRT X86_64

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David Ansart edited this page Aug 28, 2024 · 34 revisions

Build vwifi for OpenWRT

  • On cross-compiler

  • Install necessary packages for libnl :

    sudo apt install --yes make bison flex

  • Create the working folder ${HOME}/OpenWRT :

    mkdir ${HOME}/OpenWRT
cd ${HOME}/OpenWRT

OpenWRT

Download the SDK of OpenWRT

Download the Toolchain of OpenWRT

  • Download it :

    wget https://downloads.openwrt.org/releases/23.05.4/targets/x86/64/openwrt-toolchain-23.05.4-x86-64_gcc-12.3.0_musl.Linux-x86_64.tar.xz

  • Uncompress and rename it to ${HOME}/OpenWRT/TOOLCHAIN :

    tar xvf openwrt-toolchain-23.05.4-x86-64_gcc-12.3.0_musl.Linux-x86_64.tar.xz
mv openwrt-toolchain-23.05.4-x86-64_gcc-12.3.0_musl.Linux-x86_64 TOOLCHAIN

  • Update PATH :

    PATH=$PATH:"${HOME}/OpenWRT/TOOLCHAIN/toolchain-x86_64_gcc-12.3.0_musl/bin"

export STAGING_DIR="/tmp"

LibNL

Download the code of libnl

  • The file is here : https://github.com/thom311/libnl

  • Download it :

    wget https://github.com/thom311/libnl/releases/download/libnl3_10_0/libnl-3.10.0.tar.gz

  • Uncompress and rename it to ${HOME}/OpenWRT/libnlsrc :

    tar xvf libnl-3.10.0.tar.gz
mv libnl-3.10.0 libnlsrc

Compilation of libnl for OpenWRT

  • Go to the folder ${HOME}/OpenWRT/libnlsrc :

    cd ${HOME}/OpenWRT/libnlsrc

  • Build :

    ./configure --build=x86_64-unknown-linux-gnu  --host=x86_64-openwrt-linux-musl LDFLAGS="-static"
make

  • Link necessary files in ${HOME}/OpenWRT/LIBNL :

    mkdir ${HOME}/OpenWRT/LIBNL
ln -s ${HOME}/OpenWRT/libnlsrc/include ${HOME}/OpenWRT/LIBNL/include
ln -s ${HOME}/OpenWRT/libnlsrc/lib/.libs ${HOME}/OpenWRT/LIBNL/libs

VWifi

Download the code of vwifi

  • Download it :

    cd ${HOME}/OpenWRT/
wget https://github.com/Raizo62/vwifi/archive/refs/heads/master.zip

  • Uncompress and rename it to ${HOME}/OpenWRT/vwifi :

    unzip master.zip
mv vwifi-master vwifi
cd vwifi

  • Edit the file "Makefile" to update the values of NETLINK_FLAGS and NETLINK_LIBS :

    sed -i 's#^NETLINK_FLAGS.*#NETLINK_FLAGS=-I${HOME}/OpenWRT/LIBNL/include#g' ${HOME}/OpenWRT/vwifi/Makefile
sed -i 's#^NETLINK_LIBS.*#NETLINK_LIBS=-L${HOME}/OpenWRT/LIBNL/libs -lnl-genl-3 -lnl-3#g' ${HOME}/OpenWRT/vwifi/Makefile
    • NETLINK_FLAGS = -I${HOME}/OpenWRT/LIBNL/include
    • NETLINK_LIBS = -L${HOME}/OpenWRT/LIBNL/libs -lnl-genl-3 -lnl-3

  • If you will not build vsock for OpenWRT, you can disable it in vwifi :

    sed -i 's$^#define ENABLE_VHOST$//#define ENABLE_VHOST$g' ${HOME}/OpenWRT/vwifi/src/config.h

  • Apply an ugly patch to the call of "struct msghdr msg" in the file src/cmonwirelessdevice.cc :

    sed -i 's$1, NULL, 0,$1, 0, 0, 0, 0,$' ${HOME}/OpenWRT/vwifi/src/cmonwirelessdevice.cc

  • Build vwifi-client :

    make directories
make vwifi-client CXX=x86_64-openwrt-linux-musl-g++ LD=x86_64-openwrt-linux-musl-ld

  • Copy vwifi-client on OpenWRT, in the folder /usr/sbin/ :

    scp vwifi-client [email protected]:/usr/sbin/

On OpenWRT

Prerequisites

mac80211-hwsim

  • Install le package kmod-mac80211-hwsim :

    opkg update
opkg install kmod-mac80211-hwsim

  • Unload it and set the default number of radios to 0 :

    rmmod mac80211-hwsim
echo 'mac80211_hwsim radios=0' > /etc/modules.d/mac80211-hwsim

  • Reboot Openwrt :

    reboot

  • Delete the configurations generated by OpenWRT for the radios created by the install of kmod-mac80211-hwsim :

    uci delete wireless.radio0
uci delete wireless.default_radio0
uci delete wireless.radio1
uci delete wireless.default_radio1
uci commit wireless

libstdcpp6

  • Package required because vwifi is C++ :

    opkg install libstdcpp6

Run with command line

  • vwifi-client 172.16.0.1 -n 1 with 172.16.0.1 the IP of vwifi-server

Run like a service

  • Create the service file : /etc/init.d/vwifi-client :

    #!/bin/sh /etc/rc.common

START=10
STOP=15

start() {        
        echo start vwifi-client
        vwifi-client 172.16.0.1 --number 2 --mac '74:f8:f6:66' &> /dev/null &
}                 

stop() {          
        echo stop vwifi-client
        kill -9 $(pgrep vwifi-client) 
}
    • Modify 172.16.0.1 to the IP of vwifi-server

  • Make /etc/init.d/vwifi-client executable :

    chmod +x /etc/init.d/vwifi-client

  • Configure to run the service when OpenWRT boots :

    service vwifi-client enable

  • Run the service :

    service vwifi-client start

Test Wifi from OpenWRT

  • Don't forget to install "wpa-supplicant" and "hostapd" :

    opkg install hostapd
opkg install wpa-supplicant
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