A simple script which allows you to automatically login if it detects a connection to the local gateway

alliance_autologin.sh

#!/bin/bash

#-- CONFIGURATION AREA ----------------------------
# Please fill the following details, which is just
# after this comment section, before running this
# script. Otherwise, you can't login
#
#	1. GATEWAY_IP
#	2. USER (Your Alliance login username)
#	3. PASSWD (Your Alliance login password)
#
# Note: Don't share this file with ANYONE
# once you have filled your username and password

GATEWAY_IP=""
USER=""
PASSWD=""

#-- DON'T CHANGE THESE VALUE ----------------------
#-- UNLESS YOU KNOW WHAT YOU ARE DOING ------------

NET_CHK_IP="1.1.1.1"
SHORT_SLEEP=5
LONG_SLEEP=15
PING_WAIT_DUR=5
PING_NUM_MSG=3
LOGIN_URL="http://$GATEWAY_IP/0/up/"
DT_FMT="+%H:%M:%S on %d/%m/%Y"

#-- COLOR CODES TO MAKE THE OUTPUT PRETTY ---------

CLR_NULL="\e[0m"
CLR_BLK="\e[30m"
CLR_WHT="\e[97m"

CLR_BK_RED="\e[101m"
CLR_BK_BLU="\e[44m"
CLR_BK_YLW="\e[43m"
CLR_BK_GRN="\e[42m"
CLR_BK_MGN="\e[100m"

#--------------------------------------------------

# Function to check connectivity
# #1 number of ping messages
# #2 wait time per ping message
# #3 ping server

CHECK_CON()
{
	SUM=0

	for (( i=1; i<=$1; i++ ))
	do
		ping -c 1 -W $2 $3 >> /dev/null 2>&1

		SUM=$(( $SUM+$? ))
	done

	if [ $SUM -eq $1 ]
	then
		# no connection
		return 1
	else
		# connection exists
		return 0
	fi
}

#--------------------------------------------------

while [ true ]
do
	while [ true ]
	do
		# checking if local gateway is reachable
		CHECK_CON $PING_NUM_MSG $PING_WAIT_DUR $GATEWAY_IP

		# if not reachable, keep on checking
		if [ $? -eq 1 ]
		then
			CON_TIME=$(date "$DT_FMT")
			echo -e "${CLR_BK_RED}${CLR_WHT}[ERROR] :${CLR_NULL} LAN disconnected at $CON_TIME. Retrying..."

			sleep $SHORT_SLEEP
		else
			#echo -e "${CLR_BK_BLU}${CLR_BLK}[INFO]  :${CLR_NULL} LAN connected"
			break
		fi
	done

	# checking if Internet is reachable
	CHECK_CON $PING_NUM_MSG $PING_WAIT_DUR $NET_CHK_IP

	# if external site not reachable, logging into ISP
	if [ $? -eq 1 ]
	then
		CON_TIME=$(date "$DT_FMT")

		echo -e "${CLR_BK_MGN}${CLR_WHT}[ERROR] :${CLR_NULL} Logged out in at $CON_TIME. Trying to login..."

		curl -ksS -X POST -d "login=LOGIN&user="${USER}"&pass="${PASSWD}"" "${LOGIN_URL}" > /dev/null 2>&1

		CON_TIME=$(date "$DT_FMT")

		echo -e "${CLR_BK_YLW}${CLR_BLK}[INFO]  :${CLR_NULL} Logged in at $CON_TIME"
	else
		#echo -e "${CLR_BK_GRN}${CLR_BLK}[INFO]  :${CLR_NULL} Internet connected"
		sleep $LONG_SLEEP
	fi
done