#!/usr/bin/env ash
phone_number="<your_phone_number>"
password="<your_password>"
interface="<your_interface>"

echo "Waiting for IP address on interface ${interface}..." >&2

max_attempts=30
attempt=0

while [ -z "$ip" ] && [ $attempt -lt $max_attempts ]; do
    ip=$(ip addr | awk -v iface_name="$interface" '/^[0-9]+:/{iface=$2; sub(/:$/,"",iface)} iface==iface_name && /inet /{split($2,a,"/"); print a[1]; exit}')
    if [ -z "$ip" ]; then
        sleep 1
        attempt=$((attempt+1))
        echo "Attempt ${attempt}: Still no IP. Retrying..." >&2
    fi
done

if [ -z "$ip" ]; then
    echo "Error: Could not get IP address for interface ${interface} after ${max_attempts} attempts. Exiting." >&2
    exit 1
fi

mac=$(ip addr | awk -v iface_name="$interface" '/^[0-9]+:/{iface=$2; sub(/:$/,"",iface)} iface==iface_name && /link\/ether/{print $2; exit}')

echo "ip = ${ip}"
echo "mac = ${mac}"

curl_command="curl -X POST \"http://192.1.1.55:801/eportal/?c=ACSetting&a=Login&protocol=http:&hostname=192.1.1.55&iTermType=1&wlanuserip=${ip}&wlanacip=null&wlanacname=null&mac=${mac}&ip=${ip}&enAdvert=0&queryACIP=0&jsVersion=2.4.3&loginMethod=1\" -H \"User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36\" -H \"Content-Type: application/x-www-form-urlencoded\" -H \"Referer: http://192.1.1.55/\" --data-raw \"DDDDD=%2C0%2C${phone_number}%40unicom&upass=${password}&R1=0&R2=0&R3=0&R6=0&para=00&0MKKey=123456&buttonClicked=&redirect_url=&err_flag=&username=&password=&user=&cmd=&Login=&v6ip=\" -v"

curl_raw_output=$(mktemp)
location_query_string_tmp=$(mktemp)
parsed_error_params_tmp=$(mktemp)

trap "rm -f \"$curl_raw_output\" \"$location_query_string_tmp\" \"$parsed_error_params_tmp\"" EXIT

eval "$curl_command" 2>&1 | \
tee "$curl_raw_output" | \
grep -E '^< Location:' > "$location_query_string_tmp"

location_query=$(cat "$location_query_string_tmp")

if echo "$location_query" | grep -q "3.htm"; then
    echo "Authentication successful."
    exit 0
else
    echo "$location_query" | \
    sed -E 's/.*ACLogOut=([^&]*).*RetCode=([^&]*).*ErrorMsg=([^&]*).*/ACLogOut: \1\nRetCode: \2\nErrorMsg: \3/' > "$parsed_error_params_tmp"

    parsed_params_content=$(cat "$parsed_error_params_tmp")

    if [ -n "$parsed_params_content" ]; then
        echo "Authentication failed:"
        echo "${parsed_params_content}"
        exit 1
    elif [ -n "$location_query" ]; then
        echo "Authentication failed due to unknown reason. Location header query: ${location_query}"
        exit 1
    else
        echo "Authentication failed: No relevant Location header or query string found to confirm success, and no explicit error messages were detected."
        exit 1
    fi
fi