update-dns.sh

#!/bin/bash # Default values for the parametersDOMAIN=""SUBDOMAIN=""LOGIN=""PASSWORD="" # Parse command line argumentswhile getopts d:s:l:p: flagdo    case "${flag}" in        d) DOMAIN=${OPTARG};;        s) SUBDOMAIN=${OPTARG};;        l) LOGIN=${OPTARG};;        p) PASSWORD=${OPTARG};;        *) echo "Usage: $0 -d DOMAIN -s SUBDOMAIN -l LOGIN -p PASSWORD"           exit 1 ;;    esacdone # Ensure required parameters are setif [ -z "$DOMAIN" ] || [ -z "$LOGIN" ] || [ -z "$PASSWORD" ]; then    echo "Missing required parameters. Usage: $0 -d DOMAIN -s SUBDOMAIN -l LOGIN -p PASSWORD"    exit 1fi # ConstantsAPI='https://api.wedos.com/wapi/json' # Function to get authentication hashget_auth() {    local password_hash    password_hash=$(echo -n "$PASSWORD" | sha1sum | awk '{print $1}')    local phrase    phrase="${LOGIN}${password_hash}$(date +%H)"    echo -n "$phrase" | sha1sum | awk '{print $1}'} # Function to make a request to the WEDOS APIrequest() {    local command="$1"    local data="$2"    local auth    auth=$(get_auth)    local request_json    request_json=$(jq -n --arg user "$LOGIN" --arg auth "$auth" --arg command "$command" --argjson data "$data" '{        request: {            user: $user,            auth: $auth,            command: $command,            data: $data        }    }')    response=$(curl -s -X POST "$API" -d "request=$request_json")    echo "$response" | jq '.response'} # Function to get DNS rows listdns_rows_list() {    request "dns-rows-list" "$(jq -n --arg domain "$DOMAIN" '{domain: $domain}')"} # Function to update DNS rowdns_row_update() {    local row_id="$1"    local ttl="$2"    local rdata="$3"    request "dns-row-update" "$(jq -n --arg domain "$DOMAIN" --arg row_id "$row_id" --arg ttl "$ttl" --arg rdata "$rdata" '{        domain: $domain,        row_id: $row_id,        ttl: $ttl,        rdata: $rdata    }')"} # Function to commit DNS domain changesdns_domain_commit() {    request "dns-domain-commit" "$(jq -n --arg name "$DOMAIN" '{name: $name}')"} # Function to find the A recordfind_A_record() {    local rows    rows=$(dns_rows_list)    local row_id=""    local ttl=""     row_id=$(echo "$rows" | jq -r --arg sub "$SUBDOMAIN" '.data.row[] | select(.rdtype == "A" and .name == $sub) | .ID')    ttl=$(echo "$rows" | jq -r --arg sub "$SUBDOMAIN" '.data.row[] | select(.rdtype == "A" and .name == $sub) | .ttl')     if [ -z "$row_id" ]; then        echo "Cannot find A record for the domain"        exit 1    fi     echo "$row_id" "$ttl"} # Function to get the fully qualified domain namefqdn() {    if [ -z "$SUBDOMAIN" ]; then        echo "$DOMAIN"    else        echo "$SUBDOMAIN.$DOMAIN"    fi} # Function to update the A recordupdate_A_record() {    local ip="$1"    local row_id    local ttl     read -r row_id ttl <<< "$(find_A_record)"    dns_row_update "$row_id" "$ttl" "$ip"    dns_domain_commit    echo "Updated $(fqdn) to $ip"} # Function to get the current device's public IPget_current_device_public_ip() {    curl -s https://ident.me} # Function to compare the IP of the DNS record and the local device, and make changes if necessarycompare_ip_of_dns_record_and_local_device_and_make_changes() {    local testadr    testadr=$(fqdn)    local dns_ip    dns_ip=$(dig +short "$testadr")    local local_device_ip    local_device_ip=$(get_current_device_public_ip)     if [ "$dns_ip" != "$local_device_ip" ]; then        update_A_record "$local_device_ip"    else        echo "IP addresses match"    fi} # Main script executioncompare_ip_of_dns_record_and_local_device_and_make_changes