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- #!/usr/local/bin/python3
- #
- # Copyright (c) 2017-2020 Joe Clarke <jclarke@cisco.com>
- # All rights reserved.
- #
- # Redistribution and use in source and binary forms, with or without
- # modification, are permitted provided that the following conditions
- # are met:
- # 1. Redistributions of source code must retain the above copyright
- # notice, this list of conditions and the following disclaimer.
- # 2. Redistributions in binary form must reproduce the above copyright
- # notice, this list of conditions and the following disclaimer in the
- # documentation and/or other materials provided with the distribution.
- #
- # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- # SUCH DAMAGE.
- from __future__ import print_function
- import sys
- import json
- from sparker import Sparker, MessageType
- import re
- import requests
- from requests.packages.urllib3.exceptions import InsecureRequestWarning
- requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
- import time
- import traceback
- import socket
- import logging
- import CLEUCreds
- from cleu.config import Config as C
- CNR_HEADERS = {"Accept": "application/json", "Content-Type": "application/json", "Authorization": CLEUCreds.JCLARKE_BASIC}
- ALLOWED_TO_CREATE = [
- "jclarke@cisco.com",
- "ksekula@cisco.com",
- "ayourtch@cisco.com",
- "rkamerma@cisco.com",
- "thulsdau@cisco.com",
- "lhercot@cisco.com",
- "pweijden@cisco.com",
- "udiedric@cisco.com",
- ]
- spark = Sparker(token=CLEUCreds.SPARK_TOKEN, logit=True)
- SPARK_ROOM = "DNS Queries"
- def check_for_alias(alias):
- global CNR_HEADERS
- url = C.DNS_BASE + "CCMRRSet" + "/{}".format(alias)
- response = requests.request("GET", url, params={"zoneOrigin": C.DNS_DOMAIN}, headers=CNR_HEADERS, verify=False)
- if response.status_code == 404:
- return None
- res = {}
- j = response.json()
- hostname = ""
- for rr in j["rrs"]["stringItem"]:
- m = re.search(r"^IN CNAME (.+)", rr)
- if m:
- hostname = m.group(1)
- break
- res["hostname"] = hostname
- return res
- def create_alias(hostname, alias):
- global CNR_HEADERS
- url = C.DNS_BASE + "CCMRRSet" + "/{}".format(alias)
- if re.search(r"\.", hostname) and not hostname.endswith("."):
- hostname += "."
- if not hostname.endswith("."):
- hostname += "." + C.DNS_DOMAIN + "."
- rr_obj = {"name": alias, "zoneOrigin": C.DNS_DOMAIN, "rrs": {"stringItem": ["IN CNAME {}".format(hostname)]}}
- response = requests.request("PUT", url, headers=CNR_HEADERS, json=rr_obj, verify=False)
- response.raise_for_status()
- def delete_alias(alias):
- global CNR_HEADERS
- url = C.DNS_BASE + "CCMRRSet" + "/{}".format(alias)
- response = requests.request("DELETE", url, params={"zoneOrigin": C.DNS_DOMAIN}, headers=CNR_HEADERS, verify=False)
- response.raise_for_status()
- def delete_record(hostname):
- global CNR_HEADERS
- url = C.DNS_BASE + "CCMHost" + "/{}".format(hostname)
- response = requests.request("DELETE", url, params={"zoneOrigin": C.DNS_DOMAIN}, headers=CNR_HEADERS, verify=False)
- response.raise_for_status()
- def check_for_record(hostname):
- global CNR_HEADERS
- url = C.DNS_BASE + "CCMHost" + "/{}".format(hostname)
- response = requests.request("GET", url, params={"zoneOrigin": C.DNS_DOMAIN}, headers=CNR_HEADERS, verify=False)
- if response.status_code == 404:
- return None
- res = {}
- j = response.json()
- res["ip"] = j["addrs"]["stringItem"][0]
- return res
- def create_record(hostname, ip, aliases):
- global CNR_HEADERS
- url = C.DNS_BASE + "CCMHost" + "/{}".format(hostname)
- host_obj = {"addrs": {"stringItem": [ip]}, "name": hostname, "zoneOrigin": C.DNS_DOMAIN}
- if aliases is not None:
- aliases = re.sub(r"\s+", "", aliases)
- alist = aliases.split(",")
- alist = [x + "." + C.DNS_DOMAIN + "." if not x.endswith(".") else x for x in alist]
- host_obj["aliases"] = {"stringItem": alist}
- response = requests.request("PUT", url, headers=CNR_HEADERS, json=host_obj, verify=False)
- response.raise_for_status()
- if __name__ == "__main__":
- print("Content-type: application/json\r\n\r\n")
- output = sys.stdin.read()
- j = json.loads(output)
- logging.basicConfig(
- format="%(asctime)s - %(name)s - %(levelname)s : %(message)s", filename="/var/log/dns-hook.log", level=logging.DEBUG
- )
- logging.debug(json.dumps(j, indent=4))
- message_from = j["data"]["personEmail"]
- if message_from == "livenocbot@sparkbot.io":
- logging.debug("Person email is our bot")
- print('{"result":"success"}')
- sys.exit(0)
- tid = spark.get_team_id(C.WEBEX_TEAM)
- if tid is None:
- logging.error("Failed to get Spark Team ID")
- print('{"result":"fail"}')
- sys.exit(0)
- rid = spark.get_room_id(tid, SPARK_ROOM)
- if rid is None:
- logging.error("Failed to get Spark Room ID")
- print('{"result":"fail"}')
- sys.exit(0)
- if rid != j["data"]["roomId"]:
- logging.error("Spark Room ID is not the same as in the message ({} vs. {})".format(rid, j["data"]["roomId"]))
- print('{"result":"fail"}')
- sys.exit(0)
- mid = j["data"]["id"]
- msg = spark.get_message(mid)
- if msg is None:
- logging.error("Did not get a message")
- print('{"result":"error"}')
- sys.exit(0)
- txt = msg["text"]
- found_hit = False
- if re.search(r"\bhelp\b", txt, re.I):
- spark.post_to_spark(
- C.WEBEX_TEAM,
- SPARK_ROOM,
- "To create a new DNS entry, tell me things like, `Create record for HOST with IP and alias ALIAS`, `Create entry for HOST with IP`, `Add a DNS record for HOST with IP`",
- )
- found_hit = True
- try:
- m = re.search(r"(remove|delete)\s+.*?(alias|cname)\s+([\w\-\.]+)", txt, re.I)
- if not found_hit and m:
- found_hit = True
- if message_from not in ALLOWED_TO_CREATE:
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "I'm sorry, {}. I can't do that for you.".format(message_from))
- else:
- res = check_for_alias(m.group(3))
- if res is None:
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "I didn't find an alias {}".format(m.group(3)))
- else:
- try:
- delete_alias(m.group(3))
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "Alias {} deleted successfully.".format(m.group(3)), MessageType.GOOD)
- except Exception as e:
- spark.post_to_spark(
- C.WEBEX_TEAM, SPARK_ROOM, "Failed to delete alias {}: {}".format(m.group(3), e), MessageType.BAD
- )
- m = re.search(r"(remove|delete)\s+.*?for\s+([\w\-\.]+)", txt, re.I)
- if not found_hit and m:
- found_hit = True
- if message_from not in ALLOWED_TO_CREATE:
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "I'm sorry, {}. I can't do that for you.".format(message_from))
- else:
- res = check_for_record(m.group(2))
- if res is None:
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "I didn't find a DNS record for {}.".format(m.group(2)))
- else:
- try:
- delete_record(m.group(2))
- spark.post_to_spark(
- C.WEBEX_TEAM, SPARK_ROOM, "DNS record for {} deleted successfully.".format(m.group(2)), MessageType.GOOD
- )
- except Exception as e:
- spark.post_to_spark(
- C.WEBEX_TEAM, SPARK_ROOM, "Failed to delete DNS record for {}: {}".format(m.group(2), e), MessageType.BAD
- )
- m = re.search(
- r"(make|create|add)\s+.*?for\s+([\w\-\.]+)\s+.*?([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)(\s+.*?(alias(es)?|cname(s)?)\s+([\w\-\.]+(\s*,\s*[\w\-\.,\s]+)?))?",
- txt,
- re.I,
- )
- if not found_hit and m:
- found_hit = True
- if message_from not in ALLOWED_TO_CREATE:
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "I'm sorry, {}. I can't do that for you.".format(message_from))
- else:
- res = check_for_record(m.group(2))
- if res is not None:
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "_{}_ is already in DNS as **{}**".format(m.group(2), res["ip"]))
- else:
- hostname = re.sub(r"\.{}".format(C.DNS_DOMAIN), "", m.group(2))
- try:
- create_record(m.group(2), m.group(3), m.group(8))
- spark.post_to_spark(
- C.WEBEX_TEAM, SPARK_ROOM, "Successfully created record for {}.".format(m.group(2)), MessageType.GOOD
- )
- except Exception as e:
- spark.post_to_spark(
- C.WEBEX_TEAM, SPARK_ROOM, "Failed to create record for {}: {}".format(m.group(2), e), MessageType.BAD
- )
- m = re.search(r"(make|create|add)\s+(alias(es)?|cname(s)?)\s+([\w\-\.]+(\s*,\s*[\w\-\.,\s]+)?)\s+(for|to)\s+([\w\-\.]+)", txt, re.I)
- if not found_hit and m:
- found_hit = True
- if message_from not in ALLOWED_TO_CREATE:
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "I'm sorry, {}. I can't do that for you.".format(message_from))
- else:
- aliases = m.group(5)
- aliases = re.sub(r"\s+", "", aliases)
- alist = aliases.split(",")
- already_exists = False
- for alias in alist:
- res = check_for_alias(alias)
- if res is not None:
- already_exists = True
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "_{}_ is already an alias for **{}**".format(alias, res["hostname"]))
- res = check_for_record(alias)
- if res is not None:
- already_exists = True
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "_{}_ is already a hostname with IP **{}**".format(alias, res["ip"]))
- if not already_exists:
- success = True
- for alias in alist:
- try:
- create_alias(m.group(8), alias)
- except Exception as e:
- spark.post_to_spark(C.WEBEX_TEAM, SPARK_ROOM, "Failed to create alias {}: {}".format(alias, e), MessageType.BAD)
- success = False
- if success:
- spark.post_to_spark(
- C.WEBEX_TEAM,
- SPARK_ROOM,
- "Successfully created alias(es) {} for {}".format(aliases, m.group(8)),
- MessageType.GOOD,
- )
- if not found_hit:
- spark.post_to_spark(
- C.WEBEX_TEAM,
- SPARK_ROOM,
- 'Sorry, I didn\'t get that. Please ask me to create or delete a DNS entry; or just ask for "help".',
- )
- except Exception as e:
- logging.error("Error in obtaining data: {}".format(traceback.format_exc()))
- spark.post_to_spark(
- C.WEBEX_TEAM, SPARK_ROOM, "Whoops, I encountered an error:<br>\n```\n{}\n```".format(traceback.format_exc()), MessageType.BAD
- )
- print('{"result":"success"}')
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