wdial wrapper for 3G orange modems

3g_orange.sh

#!/bin/bash
# wdial wrapper for 3G orange modems
set +o posix
ok() { echo -ne "\e[32m#\n#\t$1\n#\e[m\n"; }
nk() { echo -ne "\e[31m#\n#\t$1\n#\e[m\n"; exit 1; }

[ -c /dev/ttyHS0 ] && [ -c /dev/ttyHS1 ] && {
    USB1=/dev/ttyHS3 # Globetrotter HSUPA Modem (aka icon 451)
    USB2=/dev/ttyHS3
    PIN=
}
[ $USB1 ] || nk "Modem not detected!"

ok "Looking for wvdial pppd and grep binaries:"
which wvdial pppd grep || nk "Missing binaries!"

[ ${#PIN} -ne 4 ] && {
    ok "Enter PIN:"
    stty -echo # No echo
    read -r PIN
    stty echo
}
[ ${#PIN} -ne 4 ] && nk "PIN must be 4 chars"

ok "Introducing PIN on $USB1"
exec 3<<__EOF__
[Dialer Defaults]
Modem = $USB1
#Baud  = 57600
Init1 = ATZ+CPIN=$PIN
Init2 = ATZ
Init3 = AT+CGDCONT=1,"IP","orangeworld","0.0.0.0",0,0;
__EOF__
wvdial -C /proc/$$/fd/3

ok "Connecting with PPP over $USB2"
exec 4<<__EOF__
[Dialer Defaults]
Modem         = $USB2
#Baud          = 460800
Stupid Mode   = 1
#Auto DNS     = 0
Phone         = *99#
Username      = orange
Password      = orange
__EOF__
wvdial -C /proc/$$/fd/4

ok "Out!"