149 lines
5.1 KiB
PL/PgSQL
149 lines
5.1 KiB
PL/PgSQL
/*
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Вспомогательные функции
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* FUNCTION soa_upd(a_old TEXT) RETURNS TEXT
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* FUNCTION domain_id(a_name TEXT, a_type TEXT DEFAULT 'NATIVE') RETURNS INTEGER
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* PROCEDURE acme_insert(a_domain_id INT, a_name TEXT, a_ip TEXT, a_ttl INT)
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*/
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CREATE OR REPLACE FUNCTION soa_upd(a_old TEXT) RETURNS TEXT AS $_$
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/*
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принять SOA, проверить на "сегодня", если сегодня, то во вторую пару цифр сделать +1
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если не сегодня, или null, то сегодня += 00
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если SOA в принципе не по дате, к ней сделать +1
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*/
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DECLARE
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v_soa TEXT;
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v_id INTEGER;
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BEGIN
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v_soa := to_char(current_timestamp, 'YYYYMMDD');
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IF a_old IS NULL OR a_old < v_soa || '00' THEN
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-- SOA нет или меньше сегодняшнего
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RETURN v_soa || '00';
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END IF;
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v_id := substr(a_old, length(v_soa) + 1)::INT + 1;
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v_soa := substr(a_old, 1, length(v_soa)) || CASE WHEN v_id < 10 THEN '0' ELSE '' END || v_id::TEXT;
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RETURN v_soa;
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END
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$_$ LANGUAGE plpgsql;
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/*
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SELECT x, soa_upd(x) FROM unnest(ARRAY[
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null
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, '2023060100'
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, '2023060600'
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, '2023060604'
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, '2023060624'
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, '2024060624'
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, '202406061100'
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]) x;
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*/
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-- result was changed to bigint
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DROP FUNCTION IF EXISTS domain_id(text,text);
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CREATE OR REPLACE FUNCTION domain_id(a_name TEXT, a_type TEXT DEFAULT 'NATIVE') RETURNS BIGINT AS $_$
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/*
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Вернуть ID домена, создав его при необходимости
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*/
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DECLARE
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v_id INTEGER;
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BEGIN
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SELECT INTO v_id id FROM domains WHERE name = a_name;
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IF NOT FOUND THEN
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INSERT INTO domains (name, type) VALUES
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(a_name, a_type)
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RETURNING id INTO v_id
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;
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END IF;
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RETURN v_id;
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END
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$_$ LANGUAGE plpgsql;
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CREATE OR REPLACE PROCEDURE acme_insert(a_domain_id BIGINT, a_name TEXT, a_ip TEXT, a_ttl INT) AS $_$
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/*
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Добавление в зону для заданного a_ip записей для передачи ему контроля над зоной a_name.
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Это используется в DNS-01 challenge ACME
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*/
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BEGIN
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WITH acme(name, type, content) AS (VALUES
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( a_name, 'A', a_ip)
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, ('*.' || a_name, 'A', a_ip)
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, ('acme-' || a_name, 'NS', 'ns.' || a_name)
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, ('_acme-challenge.' || a_name, 'CNAME', 'acme-' || a_name)
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)
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INSERT INTO records (domain_id, name, ttl, type, prio, content)
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SELECT a_domain_id, name, a_ttl, type, 0, content
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FROM acme
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;
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END;
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$_$ LANGUAGE plpgsql;
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CREATE OR REPLACE FUNCTION soa_mk(
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a_domain_id BIGINT
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, a_ns_admin TEXT
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, a_refresh INTEGER DEFAULT 10800 -- 3 hours
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, a_retry INTEGER DEFAULT 3600 -- 1 hour
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, a_expire INTEGER DEFAULT 604800 -- 7 days
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, a_ttl INTEGER DEFAULT 1800 -- 30 min
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) RETURNS TEXT AS $_$
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/*
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Получить новый серийный номер зоны, проверить наличие NSERVER и вернуть строку SOA
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refresh -- time lag until the slave again asks the master for a current version of the zone file
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retry -- Should this request go unanswered, the “Retry” field regulates when a new attempt is to be carried out (< refresh)
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expire -- determines how long the zone file may still be used before the server refuses DNS information delivery
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ttl -- how long a client may hold the requested information in the cache before a new request must be sent
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Each value in seconds
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*/
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DECLARE
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v_ns text := current_setting('vars.ns'); -- master DNS host
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v_stamp text; -- zone SOA timestamp
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v_stamp_old text; -- previous zone SOA timestamp
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BEGIN
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-- check NSERVER
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IF coalesce(v_ns,'') = '' THEN
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RAISE EXCEPTION 'NSERVER is not set';
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END IF;
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-- calculate SOA with next serial
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SELECT INTO v_stamp_old split_part(content, ' ', 3) FROM records WHERE domain_id = a_domain_id AND type = 'SOA';
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v_stamp := soa_upd(v_stamp_old);
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RETURN concat_ws(' ', v_ns, a_ns_admin, v_stamp, a_refresh, a_retry, a_expire, a_ttl);
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END;
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$_$ LANGUAGE plpgsql;
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CREATE OR REPLACE FUNCTION csum_exists(a_domain_id BIGINT) RETURNS BOOL AS $_$
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/*
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Проверить совпадение vars.csum с загруженным в БД прошлый раз.
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Если нет таблицы dcape_csum - создать ее
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Если csum отличается - обновить
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*/
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DECLARE
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v_csum text := current_setting('vars.csum'); -- file csum
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v_csum_old text;
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BEGIN
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RAISE NOTICE 'Source csum: %', v_csum;
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IF to_regclass('public.dcape_csum') IS NULL THEN
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CREATE TABLE dcape_csum(
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domain_id bigint primary key REFERENCES domains(id) ON DELETE CASCADE
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, csum text
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, updated_at timestamptz(0)
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);
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ELSE
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SELECT INTO v_csum_old csum FROM dcape_csum WHERE domain_id = a_domain_id;
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END IF;
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IF v_csum_old IS NULL THEN
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INSERT INTO dcape_csum(domain_id, csum, updated_at) VALUES (a_domain_id, v_csum, now());
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ELSIF v_csum_old <> v_csum THEN
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UPDATE dcape_csum SET csum = v_csum, updated_at = now() WHERE domain_id = a_domain_id;
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ELSE
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RETURN TRUE;
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END IF;
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RETURN FALSE;
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END;
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$_$ LANGUAGE plpgsql;
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