qmi-mux-dual-ip

#!/usr/bin/env bash
# -*- coding: UTF-8 -*-
## Test for creating 2 QMI connection on 2 different QMUX devices
## options:
##     -d <device>     QMI control device
##     -i <iface>      Network Interface [default: wwan0]
##
## created: 2017-02-15
## changelog:
##  2017-03-24: added iface flag

_iface=wwan0
[ $# -eq 0 ] && sed -ne 's/^## \(.*\)/\1/p' $0 && exit 1
while getopts 'hd:i:' OPT; do
    case $OPT in
        h)
            sed -ne 's/^## \(.*\)/\1/p' $0
            exit 1
            ;;
        d)
            _device=$OPTARG
            ;;
        i)
            _iface=$OPTARG
            ;;
        \?)
            echo "---"
            sed -ne 's/^## \(.*\)/\1/p' $0
            exit 1
            ;;
    esac
done

# -------------- FUNCTIONS ------------------------------
run () {
    local cmd="$1"
    echo "$1"
    out=`$1`
    echo "$out"
}

# -------------- CHECKS ------------------------------
is_gw_already_defined=$(ip route | grep default | wc -l)
if [ $is_gw_already_defined -ge 1 ]; then
    echo "Found a Gateway alredy defined. Please disable any connection first"
    exit 0
fi

rt_table_tableA_exists=$(cat /etc/iproute2/rt_tables | grep tableA | wc -l)
if [ ! $rt_table_tableA_exists -eq 1 ]; then
    echo "Please add a routing table named 'tableA' to your /etc/iproute2/rt_table file"
    exit 0
fi

rt_table_tableB_exists=$(cat /etc/iproute2/rt_tables | grep tableB | wc -l)
if [ ! $rt_table_tableB_exists -eq 1 ]; then
    echo "Please add a routing table named 'tableB' to your /etc/iproute2/rt_table file"
    exit 0
fi

set -ue
echo "Checking whether the modem is connected to the home network..."
run "sudo qmicli -d $_device --nas-get-home-network"
echo "If the modem is connected to the home network press ENTER, othewise interrupt with C-c"
read

# -------------- CONFIGURATION ------------------------------
echo "Setting data format..."
run "sudo qmicli -d $_device --set-expected-data-format=raw-ip"
run "sudo qmicli -d $_device --wda-set-data-format=link-layer-protocol=raw-ip,ul-protocol=qmap,dl-protocol=qmap"

echo "Creating qmux-es with id 1 and 2"
echo 1 | sudo tee /sys/class/net/${_iface}/qmi/add_mux
echo 2 | sudo tee /sys/class/net/${_iface}/qmi/add_mux

echo "Setting hw network device up..."
run "sudo ip link set ${_iface} up"

# -------------- CONNECTION --------------------------------
echo "Getting cid for the first connection..."
_cid1=$(sudo qmicli -d $_device --wds-noop --client-no-release-cid | sed -n "s_\s*CID: '\([0-9]*\)'_\1_p")
echo "CID: '$_cid1'"

echo "Binding mux data port 1"
run "sudo qmicli -d $_device --wds-bind-mux-data-port=mux-id=1,ep-iface-number=2 --client-no-release-cid --client-cid=$_cid1 --verbose"

echo "Connecting qmimux0"
qmi-connect -d $_device -i qmimux0 -a web.omnitel.it -t tableA -c $_cid1
source ip-session-0-tableA
route-table-config -c ./ip-session-0-tableA -i qmimux0

echo "Getting cid for the second connection..."
_cid2=$(sudo qmicli -d $_device --wds-noop --client-no-release-cid | sed -n "s_\s*CID: '\([0-9]*\)'_\1_p")
echo "CID: '$_cid2'"

echo "Binding mux data port 2"
run "sudo qmicli -d $_device --wds-bind-mux-data-port=mux-id=2,ep-iface-number=2 --client-no-release-cid --client-cid=$_cid2"

echo "Connecting qmimux1"
qmi-connect -d $_device -i qmimux1 -a mobile.vodafone.it -t tableB -c $_cid2
source ip-session-0-tableB
route-table-config -c ./ip-session-0-tableB -i qmimux1

echo "Configuring route load balancing with gateways and ifaces"

gw1=$(ip route show table tableA | grep default | sed -n 's/^default via \([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\) dev qmimux0  proto static/\1/p')
gw2=$(ip route show table tableB  | grep default | sed -n 's/^default via \([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\) dev qmimux1  proto static/\1/p')
sudo ip route add default scope global nexthop via $gw1 dev qmimux0 weight 1 nexthop via $gw2 dev qmimux1 weight 1
echo "---"