#!/bin/python3 from sys import argv import unbound # our own module used by several scripts in the project from ztdns_db_connectivity import start_db_connection class dns_queries: def __init__(self, dns_IP, dns_id, services): self.dns_IP = dns_IP self.dns_id = dns_id self.services = services class single_query: def __init__(self, cursor, vpn_id, dns_id, service_id): self.cursor = cursor self.vpn_id = vpn_id self.dns_id = dns_id self.service_id = service_id def query_planned_queries(cursor, hour, vpn_id): # return [ # # dns server IP | dns server id | service_id | service_name # dns_queries("195.98.79.117", 23, [[89, "devuan.org"], # [44, "gry.pl"], # [112, "invidio.us"]]), # dns_queries("192.71.245.208", 33, [[77, "debian.org"], # [22, "nie.ma.takiej.domeny"], # [100, "onet.pl"]]) # ] cursor.execute(''' SELECT DISTINCT d.IP, d.dns_id FROM user_side_queries AS q JOIN user_side_dns AS d ON dns.id = q.dns_id WHERE q.vpn_id = %s ''', (vpn_id,)) dnss = cursor.fetchall() dnss_to_query = [] for dns_IP, dns_id in dnss: cursor.execute(''' SELECT s.id, s.name FROM user_side_services AS s JOIN user_side_queries AS q ON s.id = q.service_id WHERE q.vpn_id = %s AND q.dns_id = %s ''', (vpn_id, dns_id)) queries = dns_queries(dns_IP, dns_id, cursor.fetchall()) dnss_to_query.append(queries) return dnss_to_query def resolve_call_back(mydata, status, result): query = mydata # debugging print("callback called for {}".format(result.qname)) if status==0 and result.havedata: print("Result:",result.data.address_list) # write to database query.cursor.execute(''' INSERT INTO user_side_responses (date, result, dns_id, service_id, vpn_id) VALUES (current_timestamp, '', %s, %s, %s) RETURNING id ''', (query.dns_id, query.service_id, query.vpn_id)) responses_id = query.cursor.fetchone()[0] if status==0 and result.havedata: for address in data.address_list: query.cursor.execute(''' INSERT INTO user_side_response (returned_ip, responses_id) VALUES(%s, %s) ''', (address, responses_id)) # no committing, since auto-commit mode is set on the connection hour = argv[1] vpn_id = argv[2] connection = start_db_connection() cursor = connection.cursor() contexts = [] for dns_query in query_planned_queries(cursor, hour, vpn_id): ctx = unbound.ub_ctx() ctx.set_fwd(dns_IP) for service_id, service_name in dns_query.services: print("starting resolution of {} through {}".format(service_name, dns_IP)) query = single_query(cursor, vpn_id, dns_query.dns_id, service_id) ctx.resolve_async(service_name, query, resolve_call_back, unbound.RR_TYPE_A, unbound.RR_CLASS_IN) contexts.append(ctx) for ctx in contexts: ctx.wait() cursor.close() connection.close()