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[mail2smsgw.git] / convert2sms.sh

#!/bin/bash

# constants
MYDIR=$(dirname $0)
PROGNAME=$(basename $0)

# configuration variables
CONFIG=$MYDIR/convert2sms.rc
DOMAINS=$(hostname -d | awk '{ print "@" $0 }')
[ -f "$CONFIG" ] && source $CONFIG
[ -z "$GATEWAY" -o -z "$PASSWORD" ] \
    && { echo "No valid configuration"; exit 1; }

# default variables
DRYRUN=
PHONE=
TEMPFILE=$HOME/tmp/smsto.$$

# urlencode function
function urlencode () {
    string=$*

    #[ "$DRYRUN" ] && { echo $string; return; }

    for ((i = 0 ; i < ${#string} ; i++ )); do
        c=${string:$i:1}
        case "$c" in
        [-_.~a-zA-Z0-9]) echo -n $c;;
       *) printf '%%%02x' "'$c"
       esac
    done
}

# log function
function log () {
    [ "$DRYRUN" ] && echo -e "\033[1;34m$*\033[0;0m" \
        || logger -i -t SMSTO "$*"
}

# usage function
function usage () {
    echo "usage: $PROGNAME [-h] [-p ..........]"
    echo "   -d: dryrun"
    echo "   -h: help message"
    echo "   -p: phone number"
    exit $1
}

# get phone number from argument
while [ $# -ne 0 ]; do
    case "$1" in
    -d) DRYRUN=1;;
    -h) usage 0;;
    -p) shift; PHONE=$1;;
    *) usage 1;;
    esac
    shift
done
[ "$PHONE" ] || usage 1

# clean up when done
trap "/bin/rm -f $TEMPFILE" 0 1 2 3 15

# get mail from standard input
while read -t 1 line; do
    echo "$line" >> $TEMPFILE
done
[ -f "$TEMPFILE" ] || { echo "No input email"; exit 1; }

# analyse message to get sender and subject
FROM=$(awk '$1 == "From:" { sub(/[^ ]*: */, ""); print }' $TEMPFILE)
SUBJECT=$(awk '$1 == "Subject:" { sub(/[^ ]*: */, ""); print }' $TEMPFILE)
MESSAGE=$(awk '/^$/,0 { if (/^--/) exit; if (!/^$/) print }' $TEMPFILE)

# check sender domain
ERR=1
[ "$DOMAINS" ] || ERR=0
for d in $DOMAINS; do
    [ "$FROM" ] || break;
    [[ $FROM =~ $d ]] && { ERR=0; break; }
done
[ $ERR -ne 0 ] && { log "Reject from '$FROM'"; exit 1; }

# check the right pattern of the number
[[ "$PHONE" =~ ^0[0-9]*$ ]] \
    || { log "Incorrect phone number '$PHONE' from '$FROM'"; exit 1; }
[[ "$PHONE" =~ ^00 ]] \
    && { log "International phone number '$PHONE' from '$FROM'"; exit 1; }
[ ${#PHONE} -eq 10 ] \
    || { log "Non standard phone number '$PHONE' from '$FROM'"; exit 1; }

# log message
log "Accept from '$FROM' to $PHONE"

# build message
EMAIL=${FROM/#*<}; EMAIL=${EMAIL/%>*}
FROM=${FROM/%<*}; FROM=${FROM/% }
[ "$FROM" ] || FROM=EMAIL
[ "$SUBJECT" ] && SUBJECT=" "$SUBJECT":"
[ "$MESSAGE" ] && MESSAGE=$'\n'$MESSAGE

MESSAGE=$(urlencode "[$FROM]$SUBJECT$MESSAGE")

# send http command
[ "$DRYRUN" ] && echo "SMS: $MESSAGE" \
    || wget --quiet --output-document=/dev/null \
        "http://$GATEWAY:9090/sendsms?phone=$PHONE&text=$MESSAGE&password=$PASSWORD"

exit $?