mobile_ppp

# Adapted by Benjamin Binier <poulpatine@gmail.com>
# Based on Thomas Bächler’s <thomas@archlinux.org> pppoe script
# and on Robbie Smith <zoqaeski@gmail.com> contribution
# Also see <https://wiki.archlinux.org/index.php/3G_and_GPRS_modems_with_pppd> for more information.

: ${PPPD:=pppd}
: ${InterfaceRoot=dev/}

quote_word() {
    set -- "${@//\\/\\\\}"
    printf '"%s"\n' "${@//\"/\\\"}"
}

mobile_ppp_up() {
    local options_dir="$STATE_DIR/mobile_ppp-$Interface-$Profile"

    network_ready

    mkdir -p "$options_dir"
    if [[ -z $ChatScript ]]; then
        ChatScript="$options_dir/modem.chat"
        cat >> "$ChatScript" << EOF
ECHO ON
ABORT 'BUSY'
ABORT 'NO CARRIER'
ABORT 'VOICE'
ABORT 'NO DIALTONE'
ABORT 'NO DIAL TONE'
ABORT 'NO ANSWER'
ABORT 'DELAYED'
ABORT   '\nRINGING\r\n\r\nRINGING\r'
REPORT CONNECT
TIMEOUT 6
'' 'ATQ0'
'OK-AT-OK' 'ATZ'
TIMEOUT 3
'OK' 'AT+CFUN=1'
'OK' 'AT${Pin:++CPIN=$(quote_word "$Pin")}'
'' 'AT'
'OK' 'AT+CPIN?'
'+CPIN: READY' 'AT'
'OK' 'ATZ'
'OK' '${Init:-ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0}'
'OK' 'AT$(case $Mode in
  3Gonly) printf "\^SYSCFG=14,2,3fffffff,0,1";;
  3Gpref) printf "\^SYSCFG=2,2,3fffffff,0,1";;
  GPRSonly) printf "\^SYSCFG=13,1,3fffffff,0,0";;
  GPRSpref) printf "\^SYSCFG=2,1,3fffffff,0,0";;
  SYSCFG=*) printf "\^$Mode";;
  # If set to "None", this is a no-op
esac)'
${AccessPointName:+'OK-AT-OK' 'AT+CGDCONT=2,$(quote_word "IP"),$(quote_word "$AccessPointName")'}
'OK' 'ATDT${PhoneNumber:-*99#}'
TIMEOUT 30
CONNECT ''
EOF
    fi

    cat >> "$options_dir/options" << EOF
linkname $(quote_word "$Profile")
${PPPUnit:+unit $(quote_word "$PPPUnit")}
$(quote_word "$Interface")
921600
lock
crtscts
modem
passive
novj
holdoff 10

noauth
noipdefault
$(is_yes "${DefaultRoute:-yes}" || printf no)defaultroute
maxfail $(quote_word "${MaxFail:-5}")
$(is_yes "${UsePeerDNS:-yes}" && printf usepeerdns)
hide-password
${User:+user $(quote_word "$User")}
${Password:+password $(quote_word "$Password")}
connect $(quote_word "/usr/sbin/chat -v -t15 -f $(quote_word "$ChatScript")")
${OptionsFile:+file $(quote_word "$OptionsFile")}
EOF

    if ! $PPPD file "$options_dir/options"; then
        rm -r "$options_dir"
        report_error "Could not establish a ppp connection for profile '$Profile'."
        return 1
    fi
}

mobile_ppp_down() {
    local options_dir pidfile pid
    options_dir="$STATE_DIR/mobile_ppp-$Interface-$Profile"
    pidfile="/var/run/ppp-$Profile.pid"

    if [[ -r $pidfile ]]; then
        read pid < "$pidfile"
        (( pid )) && kill "$pid"
        # Allow pppd up to one second to clean up
        timeout_wait 1 '[[ ! -f $pidfile ]]'
    fi

    rm -r "$options_dir"
}


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