SMS gateway with HTTP GET access on OpenWRT

   

     In my cluster so many virtual PC are working and different people connect to it wia VPN server. I want to know when and who connect. This project provide service of SMS notification. It build from available components and not expensive. I use next equipment: Router - TP-Link 703N, sd card with 2GB size, GSM modem Huawei E220, USB HUB with external power. It need to preinstall BARRIER BREAKER (14.07, r42625) on Router.

Install all needed packages.

For BB (Barrier Breaker) - 

root@OpenWrt:~#opkg update

root@OpenWrt:~#opkg install kmod-usb-storage kmod-fs-ext4 block-mount

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For AA (Attitude Adjastment) - 

opkg update

opkg install block-mount kmod-usb-core kmod-usb2 kmod-usb-uhci kmod-usb-storage kmod-fs-ext2

For CC (Chaos Calmer) - 

opkg update

opkg install block-mount kmod-fs-ext4 kmod-usb-storage-extras

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Then mount sd card which is detected on system (check dmesg and /dev)

mount /dev/sda1 /mnt

tar -C /overlay -cvf - . | tar -C /mnt -xf -

umount /mnt

block detect > /etc/config/fstab

vi /etc/config/fstab

Edit the following in /etc/config/fstab:

Set all enabled '0'  → enabled '1'

Edit option target of your root overlay partition to show /overlay (not overlay, as it will cause broken, duplicate mounts)

Edit option target of your other partition(s) to show whatever mount point(s) you want them to have (make sure to also create the directories those mount points point to)

You'll end up with an fstab looking something like this:

config 'global' option anon_swap '0' 

 option anon_mount '0' 

 option auto_swap '1' 

 option auto_mount '1' 

 option delay_root '5' 

 option check_fs '0'

config 'mount' option target '/overlay' 

 option uuid 'c91232a0-c50a-4eae-adb9-14b4d3ce3de1' 

 option enabled '1'

config 'swap' option uuid '08b4f0a3-f7ab-4ee1-bde9-55fc2481f355' 

 option enabled '1'

Reboot the router

Install packages which need for GSM modem.

For BB

opkg install chat comgt luci-proto-3g kmod-usb-serial kmod-usb-ohci kmod-usb-serial-option kmod-usb-serial-wwan

opkg install usbutils

lsusb

Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 003 Device 002: ID 12d1:1003 Huawei Technologies Co., Ltd. E220 HSDPA Modem / E230/E270 HSDPA/HSUPA Modem

Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Install http server, php and gnokii sms utility

opkg install php5 php5-cgi php5-cli lighttpd lighttpd-mod-cgi gnokii

Change basic config in lighttpd.conf

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server.document-root = "/sms"

server.port = 81

cgi.assign = ( ".php"  => "/usr/bin/php-cgi" )

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Create sms.php script file. It use gnokii app to send SMS and write to sms.log

root@OpenWrt:~# cat /sms/sms.php

<?php

$nomer=$_GET['nomer'];

$text=$_GET['text'];

$output = shell_exec("echo $text | gnokii --sendsms $nomer");

$myfile = fopen("sms.log", "a") or die("Unable to open file!");

$today = date("Y-m-d H:i:s");

$txt = "$today $nomer $text";

fwrite($myfile, "\n". $txt);

fclose($myfile);

?>

Ok. So now our server in port 81 must execute script sms.php and accept requests 

http://10.60.254.100:81/sms.php?nomer=0555550115&text=Test_messages

To inform me about user connection to VPN server it needed to insert some commands to ipup script

[root@VPN ~]# cat /etc/ppp/ip-up.local

#!/bin/sh

CURRENT_MTU="`ifconfig $1 | grep -Po '(?<=MTU:)([0-9]+)'`"

FIXED_MTU="`expr $CURRENT_MTU + 4`"

ifconfig $1 mtu $FIXED_MTU

echo "Increased MTU for $1 to $FIXED_MTU (from $CURRENT_MTU) to fix MPPE Microsoft Point-to-Point bug #330973"

reqq="tail /var/log/messages | grep ip-up | sed -E 's/[[:space:]]+/_/g' | sed -re 's:VPN.*ip-up\s*(.*):\1:'"

curl "http://10.60.254.100:81/sms.php?nomer=0555550115&text=DC_VPN_$reqq"