#!/bin/bash
#
# a simple remote shell for m0n0wall
#
# run a script:
#       m0n0sh <filename>
#
# run a single command:
#       m0n0sh -c <command>
#
# run interactive shell:
#       m0n0sh

USER="admin"            # username
PASS="mono"                     # password
IP="192.168.0.1"        # m0n0wall ip address
PROTO="http"            # webgui port (http/https)

PROMPT="m0n0sh # "

URL="$PROTO://$IP/exec_raw.php?cmd="
WGET="wget -q -O- -t1 -T3 --http-user=$USER --http-passwd=$PASS $URL"

die(){
       echo "connection failed. ($PROTO://$USER:$PASS@$IP)" >&2
       exit 1
}

urlencode(){
       echo "$@" | awk '
       BEGIN {
               split ("1 2 3 4 5 6 7 8 9 A B C D E F", hextab, " ")
               hextab [0] = 0
               for ( i=1; i<=255; ++i ) ord [ sprintf ("%c", i) "" ] = i + 0
       }
       {
               encoded = ""
               for ( i=1; i<=length ($0); ++i ) {
                       c = substr ($0, i, 1)
                       if ( c ~ /[a-zA-Z0-9.-]/ ) {
                               encoded = encoded c
                       } else if ( c == " " ) {
                               encoded = encoded "+"
                       } else {
                               lo = ord [c] % 16
                               hi = int (ord [c] / 16);
                               encoded = encoded "%" hextab [hi] hextab [lo]
                       }
               }
               print encoded
       }'
}

if [ "$1" = "-c" ]; then
       shift
       ${WGET}"$(urlencode "$@")" || die

elif [ ! -z "$*" -a -f "$1" ]; then
       while read LINE; do
               [ -z "$LINE" ] ||
                       ${WGET}"$(urlencode "$LINE")"  || die
       done < $1

else
       echo -n "$PROMPT"
       while read LINE; do
               [ -z "$LINE" ] ||
                       ${WGET}"$(urlencode "$LINE")"  || die
               echo -n "$PROMPT"
       done
fi