qmi-lib

#!/usr/bin/env bash
# Helper for configuring IP session on QMI

which tee > /dev/null

mask2cdr ()
{
   # Assumes there's no "255." after a non-255 byte in the mask
   local x=${1##*255.}
   set -- 0^^^128^192^224^240^248^252^254^ $(( (${#1} - ${#x})*2 )) ${x%%.*}
   x=${1%%$3*}
   echo $(( $2 + (${#x}/4) ))
}

parse_output() {
  local FILE=$1
  local ID=$2
  local TABLE=$3
  local OUT=ip-session-"$ID-$TABLE"
  set -u
  set -e

  cat /dev/null > $OUT

  IP=$(sed -n "s/IPv4 address: \([0-9\./]*\)/\1/p" $FILE | sed -n "s/\s*//p")
  GW=$(sed -n "s/IPv4 gateway address: \([0-9\.]*\)/\1/p" $FILE | sed -n "s/\s*//p")
  NETMASK=$(sed -n "s/IPv4 subnet mask: \([0-9\.]*\)/\1/p" $FILE | sed -n "s/\s*//p")
  PREFIX=$(mask2cdr $NETMASK)

  echo NET=$IP/$PREFIX >> $OUT
  echo NETMASK=$NETMASK >> $OUT
  echo IP=$IP   >> $OUT
  echo GW=$GW   >> $OUT
  echo PREFIX=$PREFIX >> $OUT
  echo TABLE=$TABLE >> $OUT
}

connect () {
  local DEV1=$1
  local APN=$2
  local ID=$3
  local TABLE=${4-main}

  set -u
  set -e

  output=$(mktemp /tmp/qmi-stateXXX)
  sudo qmicli -p -d $DEV1 --wds-start-network=apn=$APN,ip-type=4 --client-no-release-cid
  sudo qmicli -p -d $DEV1 --wds-get-current-settings | tee $output
  parse_output $output $ID $TABLE
  echo RMNET=$(sudo qmicli -p -d $DEV1 --get-wwan-iface) >> $output
  rm $output
}

get_client_id () {
    # Stream is the output log of a qmicli command obtained with --client-no-release-cid
    local stream=$1
    _mux_id=`sed -n "s_CID: '\([0-9]*\)'_\1_p" $stream`
    echo $_mux_id
}