Network sharing from PC to Phone [Answered]

answered 2014-10-16 09:54:04 +0200

rainisto
6348 ●69 ●98 ●112

moderator

updated 2015-05-28 12:09:32 +0200

Edit on latest 1.1.6+ images there has been changes in connman so you dont need to hack connmanctl anymore, just use normal route commands.

Unfortunately some applications check with connman about the network status. So you need to connect your phone to for example non-working open wlan accesspoint, and just use usb connection as default route.

Following is only for advanced users. Don't blame me if you mess up your networking. Remember to take backups of your connman config so you can recover back to normal.

More complicated answer if you really want to do it. Is first remove blacklisted usb and rndis interfaces from /etc/connman/main.conf (and append gadget to PreferredTechnologies line if you want)

And after reboot install connman-tools package, and use "connmanctl services" to get list of your usb gadget line and then use

/usr/lib/connman/tools/connmanctl config gadget_[identifierFromServicescommand]_usb --ipv4 manual 192.168.2.15 255.255.255.0 192.168.2.14 --nameservers 8.8.8.8
/usr/lib/connman/tools/connmanctl connect gadget_[identifierFromServicescommand]_usb

After that connmanctl state should be "ready" and email client should not be asking network connect queries anymore.

Here is example usbnet.sh script that I use on my phone (start with "usbnet.sh start" vs "usbnet.sh stop"):

#!/bin/sh
#### in /etc/networking/interfaces-file I have the following lines in Linux PC:
#allow-hotplug usb0
#auto usb0
#iface usb0 inet static
#        address 192.168.2.14
#        netmask 255.255.255.0
#        up iptables -A POSTROUTING -t nat -s 192.168.2.15/32 -j MASQUERADE
#        up echo 1 > /proc/sys/net/ipv4/ip_forward
#        down iptables -D POSTROUTING -t nat -s 192.168.2.15/32 -j MASQUERADE
#        down echo 0 > /proc/sys/net/ipv4/ip_forward

if [ -f /usr/lib/connman/tools/connmanctl ]; then
  ctl=/usr/lib/connman/tools/connmanctl
else
  echo "please install connman-tools first"
  exit 1
fi
check=`grep usb /etc/connman/main.conf`
if [ "$check" == "" ]; then
  echo /etc/connman/main.conf seems ok.
else
  echo please fix /etc/connman/main.conf by for example running following command:
  echo "# sudo sed -i 's/usb,//g' /etc/connman/main.conf" 
  echo "and reboot machine"
  exit 1
fi

if [ "$*" == "start" ]; then
  $ctl enable gadget > /dev/null 2>&1 
  gadget=`$ctl services|grep gadget|cut -b 26-|tail -1`
  if [ "$gadget" == "" ]; then
    echo "did not find any connected gadget"
  else
    echo "lets rock and roll. Disconnect cellular and wifi connections..."
    $ctl disable wifi > /dev/null 2>&1
    $ctl disable cellular > /dev/null 2>&1
    echo "lets try figure out pc side ip..."
    pc_ip=`netstat -a -n|grep 15:22|cut -d: -f8|tail -1`
    if [ "$pc_ip" == "" ]; then 
      pc_ip=192.168.2.14
      echo "reverting to default 192.168.2.14"
    else
      echo "found it: $pc_ip"
    fi
    $ctl config $gadget --ipv4 manual 192.168.2.15 255.255.255.0 $pc_ip --nameservers 8.8.8.8
    $ctl connect $gadget > /dev/null 2>&1
  fi
else
  echo "stopping usbnet.sh"
  $ctl enable wifi > /dev/null 2>&1
  $ctl enable cellular > /dev/null 2>&1 
fi