#!/usr/bin/sh
#----------------------------------------------------------------------------
# /var/install/config.d/dnscrypt-proxy.sh - nscd configuration file
#
# Creation:     2025-11-17 hbfl
# Last Update:  $Id$
#
# Copyright (c) 2021-@@YEAR@@ the eisfair team, team(at)eisfair(dot)org
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#----------------------------------------------------------------------------

package_name=dnscrypt-proxy

# added config file
. /etc/config.d/dnscrypt-proxy

config_file='/etc/dnscrypt-proxy/dnscrypt-proxy.toml'

VERSION=3.6.0

# ---------------------------------------------------------------------------
# dnscrypt-proxy start
# ---------------------------------------------------------------------------
dnscrypt_proxy_start()
{
    if /usr/sbin/service is-enabled dnscrypt-proxyd.socket
    then
        /usr/sbin/service daemon-reload
        /usr/sbin/service restart dnscrypt-proxyd.socket
    else
        /usr/sbin/service enable dnscrypt-proxyd.socket
        /usr/sbin/service start dnscrypt-proxyd.socket
    fi
}

# ---------------------------------------------------------------------------
# dnscrypt-proxy stop
# ---------------------------------------------------------------------------
dnscrypt_proxy_stop()
{
    /usr/sbin/service disable dnscrypt-proxyd.socket
    /usr/sbin/service stop dnscrypt-proxyd.socket
    /usr/sbin/service stop dnscrypt-proxyd.service
}


# ---------------------------------------------------------------------------
# create_config
# ---------------------------------------------------------------------------
create_config()
{
    {

    echo '##############################################'
    echo '#                                            #'
    echo '#        dnscrypt-proxy configuration        #'
    echo '#                                            #'
    echo '##############################################'

        ## This is an example configuration file.
        ## You should adjust it to your needs, and save it as "dnscrypt-proxy.toml"
        ##
        ## Online documentation is available here: https://dnscrypt.info/doc
    echo
    echo '###############################################################################'
    echo '#                             Global settings                                 #'
    echo '###############################################################################'
    echo
        ## List of servers to use
        ##
        ## Servers from the "public-resolvers" source (see down below) can
        ## be viewed here: https://dnscrypt.info/public-servers
        ##
        ## The proxy will automatically pick working servers from this list.
        ## Note that the require_* filters do NOT apply when using this setting.
        ##
        ## By default, this list is empty and all registered servers matching the
        ## require_* filters will be used instead.
        ##
        ## Remove the leading # first to enable this; lines starting with # are ignored.

        # server_names = ['scaleway-fr', 'google', 'yandex', 'cloudflare']


        ## List of local addresses and ports to listen to. Can be IPv4 and/or IPv6.
        ## Example with both IPv4 and IPv6:
        ## listen_addresses = ['127.0.0.1:53', '[::1]:53']
        ##
        ## To listen to all IPv4 addresses, use `listen_addresses = ['0.0.0.0:53']`
        ## To listen to all IPv4+IPv6 addresses, use `listen_addresses = ['[::]:53']`

        #listen_addresses = ['127.0.0.1:53']
    echo 'listen_addresses = []'

        ## Maximum number of simultaneous client connections to accept

    echo 'max_clients = 250'

        ## Switch to a different system user after listening sockets have been created.
        ## Note (1): this feature is currently unsupported on Windows.
        ## Note (2): this feature is not compatible with systemd socket activation.
        ## Note (3): when using -pidfile, the PID file directory must be writable by the new user

        # user_name = 'nobody'
    echo
    echo '###############################################################################'
    echo '#                            Server Selection                                 #'
    echo '###############################################################################'
    echo
        ## Require servers (from remote sources) to satisfy specific properties

        # Use servers reachable over IPv4
    echo 'ipv4_servers = true'

        # Use servers reachable over IPv6 -- Do not enable if you don't have IPv6 connectivity
    echo 'ipv6_servers = false'

        # Use servers implementing the DNSCrypt protocol
    echo 'dnscrypt_servers = true'

        # Use servers implementing the DNS-over-HTTPS protocol
    echo 'doh_servers = true'

        # Use servers implementing the Oblivious DoH protocol
    echo 'odoh_servers = false'


        ## Require servers defined by remote sources to satisfy specific properties

        # Server must support DNS security extensions (DNSSEC)
    echo 'require_dnssec = true'

        # Server must not log user queries (declarative)
    echo 'require_nolog = true'

        # Server must not enforce its own blocklist (for parental control, ads blocking...)
    echo 'require_nofilter = true'

        # Server names to avoid even if they match all criteria
    echo 'disabled_server_names = []'

    echo
    echo '###############################################################################'
    echo '#                           Connection Settings                               #'
    echo '###############################################################################'
    echo
        ## Always use TCP to connect to upstream servers.
        ## This can be useful if you need to route everything through Tor.
        ## Otherwise, leave this to `false`, as it doesn't improve security
        ## (dnscrypt-proxy will always encrypt everything even using UDP), and can
        ## only increase latency.

    echo 'force_tcp = false'


        ## Enable *experimental* support for HTTP/3 (HTTP over QUIC)
        ## Note that, like DNSCrypt but unlike other HTTP versions, this uses
        ## UDP and (usually) port 443 instead of TCP.

    echo 'http3 = false'

        ## When http3 is true, always try HTTP/3 first for DoH servers.
        ## If the HTTP/3 connection fails, fallback to HTTP/2 and don't try
        ## HTTP/3 again for that server. By default, HTTP/3 is only used for
        ## servers that advertise support via the Alt-Svc header.
        ##
        ## WARNING: This setting is disabled by default because it will make
        ## connections significantly slower for servers that don't support HTTP/3.
        ## This is primarily a workaround for server operators who haven't
        ## configured their servers to send proper Alt-Svc headers. The better
        ## solution is to reach out to these operators and encourage them to
        ## fix their servers to correctly advertise HTTP/3 support.

    echo 'http3_probe = false'


        ## SOCKS proxy
        ## Uncomment the following line to route all TCP connections to a local Tor node
        ## Tor doesn't support UDP, so set `force_tcp` to `true` as well. When passing
        ## a random username and password to Tor's socks5 connection, dnscrypt-proxy gets
        ## an isolated circuit so it will not share an exit node with other applications.
        ## Note: the random username and password used by dnscrypt-proxy should not
        ## actually be defined in Tor's configuration.

        # proxy = 'socks5://dnscrypt:dnscrypt@127.0.0.1:9050'


        ## HTTP/HTTPS proxy
        ## Only for DoH servers

        # http_proxy = 'http://127.0.0.1:8888'


        ## How long a DNS query will wait for a response, in milliseconds.
        ## If you have a network with *a lot* of latency, you may need to
        ## increase this. Startup may be slower if you do so.
        ## Don't increase it too much. 10000 is the highest reasonable value.
        ## A timeout below 5000 is not recommended.

    echo 'timeout = 5000'


        ## Keepalive for HTTP (HTTPS, HTTP/2, HTTP/3) queries, in seconds

    echo 'keepalive = 30'


        ## Add EDNS-client-subnet information to outgoing queries
        ##
        ## Multiple networks can be listed; they will be randomly chosen.
        ## These networks don't have to match your actual networks.

        # edns_client_subnet = ['0.0.0.0/0', '2001:db8::/32']


        ## Response for blocked queries. Options are `refused`, `hinfo` (default) or
        ## an IP response. To give an IP response, use the format `a:<IPv4>,aaaa:<IPv6>`.
        ## Using the `hinfo` option means that some responses will be lies.
        ## Unfortunately, the `hinfo` option appears to be required for Android 8+

        # blocked_query_response = 'refused'

#    echo
#    echo '################################################################################'
#    echo '#                        Load Balancing & Performance                          #'
#    echo '################################################################################'
#    echo 
        ## Load-balancing strategy: 'wp2' (default), 'p2', 'ph', 'p<n>', 'first', or 'random'
        ## 'wp2' (default): Weighted Power of Two - selects the better performing server
        ## from two random candidates based on real-time RTT and success rates.
        ## 'p2': Randomly choose 1 of the fastest 2 servers by latency.
        ## 'ph': Randomly choose from fastest half of servers.
        ## 'p<n>': Randomly choose from fastest n servers (e.g., 'p3' for fastest 3).
        ## 'first': Always use the fastest server.
        ## 'random': Randomly choose from all servers.
        ## The response quality still depends on the server itself.

        # lb_strategy = 'wp2'

        ## Set to `true` to constantly try to estimate the latency of all the resolvers
        ## and adjust the load-balancing parameters accordingly, or to `false` to disable.
        ## Default is `true` that makes 'p2' `lb_strategy` work well.

        # lb_estimator = true

        ## Set to `true` to enable hot reloading of configuration files (like allowed-names.txt,
        ## blocked-names.txt, etc.) when they are modified. This can increase CPU and memory usage.
        ## Default is `false` (hot reloading is disabled).

        # enable_hot_reload = false

    echo
    echo '###############################################################################'
    echo '#                                Logging                                      #'
    echo '###############################################################################'
    echo
        ## Log level (0-6, default: 2 - 0 is very verbose, 6 only contains fatal errors)

#    echo 'log_level = 2'


        ## Log file for the application, as an alternative to sending logs to
        ## the standard system logging service (syslog/Windows event log).
        ##
        ## This file is different from other log files, and will not be
        ## automatically rotated by the application.

        # log_file = '/var/log/dnscrypt-proxy/dnscrypt-proxy.log'


        ## When using a log file, only keep logs from the most recent launch.

        # log_file_latest = true


        ## Use the system logger (syslog on Unix, Event Log on Windows)

#    echo 'use_syslog = true'


        ## Automatic log files rotation

        # Maximum log files size in MB - Set to 0 for unlimited.
    echo 'log_files_max_size = 10'

        # How long to keep backup files, in days
    echo 'log_files_max_age = 7'

        # Maximum log files backups to keep (or 0 to keep all backups)
    echo 'log_files_max_backups = 1'

    echo
    echo '###############################################################################'
    echo '#                           Certificate Management                            #'
    echo '###############################################################################'
    echo
        ## The maximum concurrency to reload certificates from the resolvers.
        ## Default is 10.

        # cert_refresh_concurrency = 10


        ## Delay, in minutes, after which certificates are reloaded

    echo 'cert_refresh_delay = 240'


        ## Initially don't check DNSCrypt server certificates for expiration, and
        ## only start checking them after a first successful connection to a resolver.
        ## This can be useful on routers with no battery-backed clock.

        # cert_ignore_timestamp = false


        ## DNSCrypt: Create a new, unique key for every single DNS query
        ## This may improve privacy but can also have a significant impact on CPU usage
        ## Only enable if you don't have a lot of network load

        # dnscrypt_ephemeral_keys = false


        ## DoH: Disable TLS session tickets - increases privacy but also latency

        # tls_disable_session_tickets = false


        ## DoH: Use TLS 1.2 and specific cipher suite instead of the server preference
        ## 49199 = TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
        ## 49195 = TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
        ## 52392 = TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
        ## 52393 = TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
        ##
        ## On non-Intel CPUs such as MIPS routers and ARM systems (Android, Raspberry Pi...),
        ## uncommenting the following line may improve performance.
        ## This may also help on Intel CPUs running 32-bit operating systems.
        ## However, this can cause issues fetching sources or connecting to some HTTP servers,
        ## and should not be set on regular CPUs.
        ##
        ## Keep tls_cipher_suite undefined to let the app automatically choose secure parameters.

        # tls_cipher_suite = [52392, 49199]


        ## Log TLS key material to a file, for debugging purposes only.
        ## This file will contain the TLS master key, which can be used to decrypt
        ## all TLS traffic to/from DoH servers.
        ## Never ever enable except for debugging purposes with a tool such as mitmproxy.

        # tls_key_log_file = '/tmp/keylog.txt'

    echo
    echo '###############################################################################'
    echo '#                            Startup & Network                                #'
    echo '###############################################################################'
    echo
        ## Bootstrap resolvers
        ##
        ## These are normal, non-encrypted DNS resolvers, that will be only used
        ## for one-shot queries when retrieving the initial resolvers list and if
        ## the system DNS configuration doesn't work.
        ##
        ## No user queries will ever be leaked through these resolvers, and they will
        ## not be used after IP addresses of DoH resolvers have been found (if you are
        ## using DoH).
        ##
        ## They will never be used if lists have already been cached, and if the stamps
        ## of the configured servers already include IP addresses (which is the case for
        ## most of DoH servers, and for all DNSCrypt servers and relays).
        ##
        ## They will not be used if the configured system DNS works, or after the
        ## proxy already has at least one usable secure resolver.
        ##
        ## Resolvers supporting DNSSEC are recommended, and, if you are using
        ## DoH, bootstrap resolvers should ideally be operated by a different entity
        ## than the DoH servers you will be using, especially if you have IPv6 enabled.
        ##
        ## People in China may want to use 114.114.114.114:53 here.
        ## Other popular options include 8.8.8.8, 9.9.9.9 and 1.1.1.1.
        ##
        ## If more than one resolver is specified, they will be tried in sequence.
        ##
        ## TL;DR: put valid standard resolver addresses here. Your actual queries will
        ## not be sent there. If you're using DNSCrypt or Anonymized DNS and your
        ## lists are up to date, these resolvers will not even be used.

    echo "bootstrap_resolvers = ['9.9.9.11:53', '8.8.8.8:53']"


        ## When internal DNS resolution is required, for example to retrieve
        ## the resolvers list:
        ##
        ## - queries will be sent to dnscrypt-proxy itself, if it is already
        ##   running with active servers (*)
        ## - or else, queries will be sent to fallback servers
        ## - finally, if `ignore_system_dns` is `false`, queries will be sent
        ##   to the system DNS
        ##
        ## (*) this is incompatible with systemd sockets.
        ## `listen_addresses` must not be empty.

    echo 'ignore_system_dns = true'


        ## Maximum time (in seconds) to wait for network connectivity before
        ## initializing the proxy.
        ## Useful if the proxy is automatically started at boot, and network
        ## connectivity is not guaranteed to be immediately available.
        ## Use 0 to not test for connectivity at all (not recommended),
        ## and -1 to wait as much as possible.

    echo 'netprobe_timeout = 60'

        ## Address and port to try initializing a connection to, just to check
        ## if the network is up. It can be any address and any port, even if
        ## there is nothing answering these on the other side. Just don't use
        ## a local address, as the goal is to check for Internet connectivity.
        ## On Windows, a datagram with a single, nul byte will be sent, only
        ## when the system starts.
        ## On other operating systems, the connection will be initialized
        ## but nothing will be sent at all.

    echo "netprobe_address = '9.9.9.9:53'"


        ## Offline mode - Do not use any remote encrypted servers.
        ## The proxy will remain fully functional to respond to queries that
        ## plugins can handle directly (forwarding, cloaking, ...)

        # offline_mode = false


        ## Additional data to attach to outgoing queries.
        ## These strings will be added as TXT records to queries.
        ## Do not use, except on servers explicitly asking for extra data
        ## to be present.
        ## encrypted-dns-server can be configured to use this for access control
        ## in the [access_control] section

        # query_meta = ['key1:value1', 'key2:value2', 'token:MySecretToken']

    echo
    echo '###############################################################################'
    echo '#                                 Filters                                     #'
    echo '###############################################################################'
    echo
        ## Note: if you are using dnsmasq, disable the `dnssec` option in dnsmasq if you
        ## configure dnscrypt-proxy to do any kind of filtering (including the filters
        ## below and blocklists).
        ## You can still choose resolvers that do DNSSEC validation.


        ## Immediately respond to IPv6-related queries with an empty response
        ## This makes things faster when there is no IPv6 connectivity, but can
        ## also cause reliability issues with some stub resolvers.

    echo 'block_ipv6 = false'


        ## Immediately respond to A and AAAA queries for host names without a domain name
        ## This also prevents "dotless domain names" from being resolved upstream.

    echo 'block_unqualified = true'


        ## Immediately respond to queries for local zones instead of leaking them to
        ## upstream resolvers (always causing errors or timeouts).

    echo 'block_undelegated = true'


        ## TTL for synthetic responses sent when a request has been blocked (due to
        ## IPv6 or blocklists).

    echo 'reject_ttl = 10'

#    echo 
#    echo '###############################################################################'
#    echo '#                              Forwarding                                     #'
#    echo '###############################################################################'
#    echo
        ## Route queries for specific domains to a dedicated set of servers

        ## See the `example-forwarding-rules.txt` file for an example

        # forwarding_rules = '/etc/dnscrypt-proxy/forwarding-rules.txt'

#    echo
#    echo '###############################################################################'
#    echo '#                              Cloaking                                       #'
#    echo '###############################################################################'
#    echo
        ## Cloaking returns a predefined address for a specific name.
        ## In addition to acting as a HOSTS file, it can also return the IP address
        ## of a different name. It will also do CNAME flattening.
        ## If 'cloak_ptr' is set, then PTR (reverse lookups) are enabled
        ## for cloaking rules that do not contain wild cards.
        ##
        ## See the `example-cloaking-rules.txt` file for an example

        # cloaking_rules = '/etc/dnscrypt-proxy/cloaking-rules.txt'

        ## TTL used when serving entries in cloaking-rules.txt

        # cloak_ttl = 600
        # cloak_ptr = false

    echo
    echo '###############################################################################'
    echo '#                                DNS Cache                                    #'
    echo '###############################################################################'
    echo
        ## Enable a DNS cache to reduce latency and outgoing traffic

    echo 'cache = true'


        ## Cache size

    echo 'cache_size = 4096'


        ## Minimum TTL for cached entries

    echo 'cache_min_ttl = 2400'


        ## Maximum TTL for cached entries

    echo 'cache_max_ttl = 86400'


        ## Minimum TTL for negatively cached entries

    echo 'cache_neg_min_ttl = 60'


        ## Maximum TTL for negatively cached entries

    echo 'cache_neg_max_ttl = 600'

#    echo
#    echo '###############################################################################'
#    echo '#                           Captive portal handling                           #'
#    echo '###############################################################################'
#    echo
#    echo '[captive_portals]'
 
        ## A file that contains a set of names used by operating systems to
        ## check for connectivity and captive portals, along with hard-coded
        ## IP addresses to return.

        # map_file = '/etc/dnscrypt-proxy/captive-portals.txt'

#    echo
#    echo '###############################################################################'
#    echo '#                            Local DoH server                                 #'
#    echo '###############################################################################'
#    echo   
#    echo '[local_doh]'

        ## dnscrypt-proxy can act as a local DoH server. By doing so, web browsers
        ## requiring a direct connection to a DoH server in order to enable some
        ## features will enable these, without bypassing your DNS proxy.

        ## Addresses that the local DoH server should listen to

        # listen_addresses = ['127.0.0.1:3000']


        ## Path of the DoH URL. This is not a file, but the part after the hostname
        ## in the URL. By convention, `/dns-query` is frequently chosen.
        ## For each `listen_address` the complete URL to access the server will be:
        ## `https://<listen_address><path>` (ex: `https://127.0.0.1/dns-query`)

        # path = '/dns-query'


        ## Certificate file and key - Note that the certificate has to be trusted.
        ## Can be generated using the following command:
        ## openssl req -x509 -nodes -newkey rsa:2048 -days 5000 -sha256 -keyout localhost.pem -out localhost.pem
        ## See the documentation (wiki) for more information.

        # cert_file = '/etc/dnscrypt-proxy/localhost.pem'
        # cert_key_file = '/etc/dnscrypt-proxy/localhost.pem'

#    echo
#    echo '###############################################################################'
#    echo '#                              Query logging                                  #'
#    echo '###############################################################################'
#    echo
#    echo '[query_log]'

        ## Path to the query log file (absolute, or relative to the same directory as the config file)
        ## Can be set to /dev/stdout in order to log to the standard output.

        # file = '/var/log/dnscrypt-proxy/query.log'


        ## Query log format (currently supported: tsv and ltsv)

#    echo "format = 'tsv'"


        ## Do not log these query types, to reduce verbosity. Keep empty to log everything.

        # ignored_qtypes = ['DNSKEY', 'NS']

#    echo
#    echo '###############################################################################'
#    echo '#                        Suspicious queries logging                           #'
#    echo '###############################################################################'
#    echo
#    echo '[nx_log]'

        ## Log queries for nonexistent zones
        ## These queries can reveal the presence of malware, broken/obsolete applications,
        ## and devices signaling their presence to 3rd parties.

        ## Path to the query log file (absolute, or relative to the same directory as the config file)

        # file = '/var/log/dnscrypt-proxy/nx.log'


        ## Query log format (currently supported: tsv and ltsv)

#    echo "format = 'tsv'"

#    echo
#    echo '###############################################################################'
#    echo '#                    Pattern-based blocking (blocklists)                      #'
#    echo '###############################################################################'
#    echo
        ## Blocklists are made of one pattern per line. Example of valid patterns:
        ##
        ##   example.com
        ##   =example.com
        ##   *sex*
        ##   ads.*
        ##   ads*.example.*
        ##   ads*.example[0-9]*.com
        ##
        ## Example blocklist files can be found at https://download.dnscrypt.info/blocklists/
        ## A script to build blocklists from public feeds can be found in the
        ## '/usr/share/dnscrypt-proxy/generate-domains-blocklists' directory.

#    echo '[blocked_names]'

        ## Path to the file of blocking rules (absolute, or relative to the same directory as the config file)

        # blocked_names_file = '/etc/dnscrypt-proxy/blocked-names.txt'


        ## Optional path to a file logging blocked queries

        # log_file = '/var/log/dnscrypt-proxy/blocked-names.log'


        ## Optional log format: tsv or ltsv (default: tsv)

        # log_format = 'tsv'

#    echo
#    echo '###############################################################################'
#    echo '#                  Pattern-based IP blocking (IP blocklists)                   #'
#    echo '###############################################################################'
#    echo
        ## IP blocklists are made of one pattern per line. Example of valid patterns:
        ##
        ##   127.*
        ##   fe80:abcd:*
        ##   192.168.1.4

#    echo '[blocked_ips]'

        ## Path to the file of blocking rules (absolute, or relative to the same directory as the config file)

        # blocked_ips_file = '/etc/dnscrypt-proxy/blocked-ips.txt'


        ## Optional path to a file logging blocked queries

        # log_file = '/var/log/dnscrypt-proxy/blocked-ips.log'


        ## Optional log format: tsv or ltsv (default: tsv)

        # log_format = 'tsv'

#    echo
#    echo '###############################################################################'
#    echo '#                 Pattern-based allow lists (blocklists bypass)               #'
#    echo '###############################################################################'
#    echo
        ## Allowlists support the same patterns as blocklists
        ## If a name matches an allowlist entry, the corresponding session
        ## will bypass names and IP filters.
        ##
        ## Time-based rules are also supported to make some websites only accessible at specific times of the day.

#    echo '[allowed_names]'

        ## Path to the file of allow list rules (absolute, or relative to the same directory as the config file)

        # allowed_names_file = '/etc/dnscrypt-proxy/allowed-names.txt'


        ## Optional path to a file logging allowed queries

        # log_file = '/var/log/dnscrypt-proxy/allowed-names.log'


        ## Optional log format: tsv or ltsv (default: tsv)

        # log_format = 'tsv'

#    echo
#    echo '###############################################################################'
#    echo '#           Pattern-based allowed IPs lists (blocklists bypass)               #'
#    echo '###############################################################################'
#    echo
        ## Allowed IP lists support the same patterns as IP blocklists
        ## If an IP response matches an allowed entry, the corresponding session
        ## will bypass IP filters.
        ##
        ## Time-based rules are also supported to make some websites only accessible at specific times of the day.

#    echo '[allowed_ips]'

        ## Path to the file of allowed ip rules (absolute, or relative to the same directory as the config file)

        # allowed_ips_file = '/etc/dnscrypt-proxy/allowed-ips.txt'


        ## Optional path to a file logging allowed queries

        # log_file = '/var/log/dnscrypt-proxy/allowed-ips.log'

        ## Optional log format: tsv or ltsv (default: tsv)

        # log_format = 'tsv'

#    echo
#    echo '###############################################################################'
#    echo '#                        Time access restrictions                             #'
#    echo '###############################################################################'
#    echo
        ## One or more weekly schedules can be defined here.
        ## Patterns in the name-based blocked_names file can optionally be followed with @schedule_name
        ## to apply the pattern 'schedule_name' only when it matches a time range of that schedule.
        ##
        ## For example, the following rule in a blocklist file:
        ## *.youtube.* @time-to-sleep
        ## would block access to YouTube during the times defined by the 'time-to-sleep' schedule.
        ##
        ## {after='21:00', before= '7:00'} matches 0:00-7:00 and 21:00-0:00
        ## {after= '9:00', before='18:00'} matches 9:00-18:00

#    echo '[schedules]'

        # [schedules.time-to-sleep]
        #   mon = [{after='21:00', before='7:00'}]
        #   tue = [{after='21:00', before='7:00'}]
        #   wed = [{after='21:00', before='7:00'}]
        #   thu = [{after='21:00', before='7:00'}]
        #   fri = [{after='23:00', before='7:00'}]
        #   sat = [{after='23:00', before='7:00'}]
        #   sun = [{after='21:00', before='7:00'}]

        # [schedules.work]
        #   mon = [{after='9:00', before='18:00'}]
        #   tue = [{after='9:00', before='18:00'}]
        #   wed = [{after='9:00', before='18:00'}]
        #   thu = [{after='9:00', before='18:00'}]
        #   fri = [{after='9:00', before='17:00'}]

    echo
    echo '###############################################################################'
    echo '#                                Servers                                      #'
    echo '###############################################################################'
    echo
        ## Remote lists of available servers
        ## Multiple sources can be used simultaneously, but every source
        ## requires a dedicated cache file.
        ##
        ## Refer to the documentation for URLs of public sources.
        ##
        ## A prefix can be prepended to server names in order to
        ## avoid collisions if different sources share the same for
        ## different servers. In that case, names listed in `server_names`
        ## must include the prefixes.
        ##
        ## If the `urls` property is missing, cache files and valid signatures
        ## must already be present. This doesn't prevent these cache files from
        ## expiring after `refresh_delay` hours.
        ## `refreshed_delay` must be in the [24..168] interval.
        ## The minimum delay of 24 hours (1 day) avoids unnecessary requests to servers.
        ## The maximum delay of 168 hours (1 week) ensures cache freshness.

    echo '[sources]'
    echo
        ### An example of a remote source from https://github.com/DNSCrypt/dnscrypt-resolvers

    echo '[sources.public-resolvers]'
    echo 'urls = ['
    echo "'https://raw.githubusercontent.com/DNSCrypt/dnscrypt-resolvers/master/v3/public-resolvers.md',"
    echo "'https://download.dnscrypt.info/resolvers-list/v3/public-resolvers.md',"
    echo ']'
    echo "cache_file = '/var/lib/dnscrypt-proxy/public-resolvers.md'"
    echo "minisign_key = 'RWQf6LRCGA9i53mlYecO4IzT51TGPpvWucNSCh1CBM0QTaLn73Y7GFO3'"
    echo 'refresh_delay = 73'
    echo "prefix = ''"
    echo
        ### Anonymized DNS relays

    echo '[sources.relays]'
    echo 'urls = ['
    echo "'https://raw.githubusercontent.com/DNSCrypt/dnscrypt-resolvers/master/v3/relays.md',"
    echo "'https://download.dnscrypt.info/resolvers-list/v3/relays.md',"
    echo ']'
    echo "cache_file = '/var/lib/dnscrypt-proxy/relays.md'"
    echo "minisign_key = 'RWQf6LRCGA9i53mlYecO4IzT51TGPpvWucNSCh1CBM0QTaLn73Y7GFO3'"
    echo 'refresh_delay = 73'
    echo "prefix = ''"
    echo
        ### ODoH (Oblivious DoH) servers and relays

        # [sources.odoh-servers]
        #   urls = ['https://raw.githubusercontent.com/DNSCrypt/dnscrypt-resolvers/master/v3/odoh-servers.md', 'https://download.dnscrypt.info/resolvers-list/v3/odoh-servers.md']
        #   cache_file = '/var/lib/dnscrypt-proxy/odoh-servers.md'
        #   minisign_key = 'RWQf6LRCGA9i53mlYecO4IzT51TGPpvWucNSCh1CBM0QTaLn73Y7GFO3'
        #   refresh_delay = 73
        #   prefix = ''
        # [sources.odoh-relays]
        #   urls = ['https://raw.githubusercontent.com/DNSCrypt/dnscrypt-resolvers/master/v3/odoh-relays.md', 'https://download.dnscrypt.info/resolvers-list/v3/odoh-relays.md']
        #   cache_file = '/var/lib/dnscrypt-proxy/odoh-relays.md'
        #   minisign_key = 'RWQf6LRCGA9i53mlYecO4IzT51TGPpvWucNSCh1CBM0QTaLn73Y7GFO3'
        #   refresh_delay = 73
        #   prefix = ''

        ### Quad9

        # [sources.quad9-resolvers]
        #   urls = ['https://quad9.net/dnscrypt/quad9-resolvers.md', 'https://raw.githubusercontent.com/Quad9DNS/dnscrypt-settings/main/dnscrypt/quad9-resolvers.md']
        #   minisign_key = 'RWQBphd2+f6eiAqBsvDZEBXBGHQBJfeG6G+wJPPKxCZMoEQYpmoysKUN'
        #   cache_file = '/var/lib/dnscrypt-proxy/quad9-resolvers.md'
        #   prefix = 'quad9-'

        ### Another example source, with resolvers censoring some websites not appropriate for children
        ### This is a subset of the `public-resolvers` list, so enabling both is useless.

        # [sources.parental-control]
        #   urls = ['https://raw.githubusercontent.com/DNSCrypt/dnscrypt-resolvers/master/v3/parental-control.md', 'https://download.dnscrypt.info/resolvers-list/v3/parental-control.md']
        #   cache_file = '/var/lib/dnscrypt-proxy/parental-control.md'
        #   minisign_key = 'RWQf6LRCGA9i53mlYecO4IzT51TGPpvWucNSCh1CBM0QTaLn73Y7GFO3'

        ### dnscry.pt servers - See https://www.dnscry.pt

        #  [sources.dnscry-pt-resolvers]
        #    urls = ["https://www.dnscry.pt/resolvers.md"]
        #    minisign_key = "RWQM31Nwkqh01x88SvrBL8djp1NH56Rb4mKLHz16K7qsXgEomnDv6ziQ"
        #    cache_file = '/var/lib/dnscrypt-proxy/dnscry.pt-resolvers.md'
        #    refresh_delay = 73
        #    prefix = "dnscry.pt-"

    echo
    echo '###############################################################################'
    echo '#                        Servers with known bugs                              #'
    echo '###############################################################################'
    echo
    echo '[broken_implementations]'

        ## Cisco servers currently cannot handle queries larger than 1472 bytes, and don't
        ## truncate responses larger than questions as expected by the DNSCrypt protocol.
        ## This prevents large responses from being received over UDP and over relays.
        ##
        ## Older versions of the `dnsdist` server software had a bug with queries larger
        ## than 1500 bytes. This is fixed since `dnsdist` version 1.5.0, but
        ## some server may still run an outdated version.
        ##
        ## The list below enables workarounds to make non-relayed usage more reliable
        ## until the servers are fixed.

    echo 'fragments_blocked = ['
    echo "'cisco'",
    echo "'cisco-ipv6',"
    echo "'cisco-familyshield',"
    echo "'cisco-familyshield-ipv6',"
    echo "'cisco-sandbox',"
    echo "'cleanbrowsing-adult',"
    echo "'cleanbrowsing-adult-ipv6',"
    echo "'cleanbrowsing-family',"
    echo "'cleanbrowsing-family-ipv6',"
    echo "'cleanbrowsing-security',"
    echo "'cleanbrowsing-security-ipv6',"
    echo ']'

#    echo
#    echo '###############################################################################'
#    echo '#                Certificate-based client authentication for DoH              #'
#    echo '###############################################################################'
#    echo
#        [doh_client_x509_auth]

        ## Use an X509 certificate to authenticate yourself when connecting to DoH servers.
        ## This is only useful if you are operating your own, private DoH server(s).
        ## 'creds' maps servers to certificates, and supports multiple entries.
        ## If you are not using the standard root CA, an optional "root_ca"
        ## property set to the path to a root CRT file can be added to a server entry.

        # creds = [
        #    { server_name='*', client_cert='client.crt', client_key='client.key' }
        # ]

    echo
    echo '###############################################################################'
    echo '#                          Anonymized DNS                                     #'
    echo '###############################################################################'
    echo
    echo  '[anonymized_dns]'

        ## Routes are indirect ways to reach DNSCrypt servers.
        ##
        ## A route maps a server name ("server_name") to one or more relays that will be
        ## used to connect to that server.
        ##
        ## A relay can be specified as a DNS Stamp (either a relay stamp, or a
        ## DNSCrypt stamp) or a server name.
        ##
        ## The following example routes "example-server-1" via `anon-example-1` or `anon-example-2`,
        ## and "example-server-2" via the relay whose relay DNS stamp is
        ## "sdns://gRIxMzcuNzQuMjIzLjIzNDo0NDM".
        ##
        ## !!! THESE ARE JUST EXAMPLES !!!
        ##
        ## Review the list of available relays from the "relays.md" file, and, for each
        ## server you want to use, define the relays you want connections to go through.
        ##
        ## Carefully choose relays and servers so that they are run by different entities.
        ##
        ## "server_name" can also be set to "*" to define a default route, for all servers:
        ## { server_name='*', via=['anon-example-1', 'anon-example-2'] }
        ##
        ## If a route is ["*"], the proxy automatically picks a relay on a distinct network.
        ## { server_name='*', via=['*'] } is also an option, but is likely to be suboptimal.
        ##
        ## Manual selection is always recommended over automatic selection, so that you can
        ## select (relay,server) pairs that work well and fit your own criteria (close by or
        ## in different countries, operated by different entities, on distinct ISPs...)

        # routes = [
        #    { server_name='example-server-1', via=['anon-example-1', 'anon-example-2'] },
        #    { server_name='example-server-2', via=['sdns://gRIxMzcuNzQuMjIzLjIzNDo0NDM'] }
        # ]


        ## Skip resolvers incompatible with anonymization instead of using them directly

    echo 'skip_incompatible = false'


        ## If public server certificates for a non-conformant server cannot be
        ## retrieved via a relay, try getting them directly. Actual queries
        ## will then always go through relays.

        # direct_cert_fallback = false

#    echo
#    echo '###############################################################################'
#    echo '#                                 DNS64                                       #'
#    echo '###############################################################################'
#    echo
#    echo [dns64]

        ## DNS64 is a mechanism for synthesizing AAAA records from A records.
        ## It is used with an IPv6/IPv4 translator to enable client-server
        ## communication between an IPv6-only client and an IPv4-only server,
        ## without requiring any changes to either the IPv6 or the IPv4 node,
        ## for the class of applications that work through NATs.
        ##
        ## There are two options to synthesize such records:
        ## Option 1: Using a set of static IPv6 prefixes;
        ## Option 2: By discovering the IPv6 prefix from DNS64-enabled resolver.
        ##
        ## If both options are configured - only static prefixes are used.
        ## (Ref. RFC6147, RFC6052, RFC7050)
        ##
        ## Do not enable unless you know what DNS64 is and why you need it, or else
        ## you won't be able to connect to anything at all.

        ## Static prefix(es) as Pref64::/n CIDRs

        # prefix = ['64:ff9b::/96']

        ## DNS64-enabled resolver(s) to discover Pref64::/n CIDRs
        ## These resolvers are used to query for Well-Known IPv4-only Name (WKN) "ipv4only.arpa." to discover only.
        ## Set with your ISP's resolvers in case of custom prefixes (other than Well-Known Prefix 64:ff9b::/96).
        ## IMPORTANT: Default resolvers listed below support Well-Known Prefix 64:ff9b::/96 only.

        # resolver = ['[2606:4700:4700::64]:53', '[2001:4860:4860::64]:53']

#    echo
#    echo '###############################################################################'
#    echo '#                           IP Encryption                                     #'
#    echo '###############################################################################'
#    echo
#    echo '[ip_encryption]'

        ## Encrypt client IP addresses in plugin logs using IPCrypt
        ## This provides privacy for client IP addresses while maintaining
        ## the ability to distinguish between different clients in logs

        ## Encryption algorithm (default: "none")
        ## - "none": No encryption (default)
        ## - "ipcrypt-deterministic": Deterministic encryption (same IP always encrypts to same value) - requires 16-byte key
        ## - "ipcrypt-nd": Non-deterministic encryption with 8-byte tweak - requires 16-byte key
        ## - "ipcrypt-ndx": Non-deterministic encryption with 16-byte tweak (extended) - requires 32-byte key

#    echo 'algorithm = "none"'

        ## Encryption key in hexadecimal format (required if algorithm is not "none")
        ## Key size depends on algorithm:
        ## - ipcrypt-deterministic: 32 hex chars (16 bytes) - Generate with: openssl rand -hex 16
        ## - ipcrypt-nd: 32 hex chars (16 bytes) - Generate with: openssl rand -hex 16
        ## - ipcrypt-ndx: 64 hex chars (32 bytes) - Generate with: openssl rand -hex 32
        ## Example for deterministic/nd: key = "1234567890abcdef1234567890abcdef"
        ## Example for ndx: key = "1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"
        ## IMPORTANT: Keep this key secret

#    echo 'key = ""'

#    echo
#    echo '###############################################################################'
#    echo '#                            Monitoring UI                                    #'
#    echo '###############################################################################'
#    echo
#        [monitoring_ui]

        ## Enable the monitoring UI
#        enabled = false

        ## Listen address for the monitoring UI
#        listen_address = "127.0.0.1:8080"

        ## Optional username and password for basic authentication
        ## To disable authentication, set username to an empty string: username = ""
        ## If both username and password are empty, no authentication is required
#        username = "admin"
#        password = "changeme"
#
        ## Optional TLS certificate and key for HTTPS
        ## If both are empty, HTTP will be used
#        tls_certificate = ""
#        tls_key = ""

        ## Enable query logging in the monitoring UI
        ## This will show recent queries in the UI
#        enable_query_log = true

        ## Privacy level for the monitoring UI
        ## 0: show all details including client IPs
        ## 1: anonymize client IPs (default)
        ## 2: aggregate data only (no individual queries or domains shown)
#        privacy_level = 1

        ## Maximum number of recent query log entries to keep in memory
        ## Helps control memory usage on high-traffic servers
        ## Default: 100
        # max_query_log_entries = 100

        ## Maximum memory usage in MB for recent query logs
        ## Automatic cleanup when limit is exceeded
        ## Default: 1
        # max_memory_mb = 1

        ## Enable Prometheus metrics endpoint
        ## Default: false
        # prometheus_enabled = false

        ## Path for Prometheus metrics endpoint
        ## Default: /metrics
        # prometheus_path = "/metrics"

#    echo
#    echo '###############################################################################'
#    echo '#                            Static entries                                   #'
#    echo '###############################################################################'
#    echo
#        [static]

        ## Optional, local, static list of additional servers
        ## Mostly useful for testing your own servers.

        # [static.myserver]
        #   stamp = 'sdns://AQcAAAAAAAAAAAAQMi5kbnNjcnlwdC1jZXJ0Lg'
    echo
    } >${config_file}

    /usr/bin/chown dnscrypt:dnscrypt ${config_file}
    /usr/bin/chmod 0640 ${config_file}
}

# ---------------------------------------------------------------------------
# exec main
# ---------------------------------------------------------------------------
main()
{
    case ${START_DNSCRYPT_PROXY} in
    yes)
        create_config
        dnscrypt_proxy_start
        ;;
    no)
        dnscrypt_proxy_stop
        ;;
    esac
}

# ---------------------------------------------------------------------------
# exec main
# ---------------------------------------------------------------------------
main "${@}"

# ---------------------------------------------------------------------------
# end
# ---------------------------------------------------------------------------