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#!/usr/bin/env python3
## \file
# \brief CNC TXT REC set up script
# Copyright (c) 2019-2021 David Timber <mieabby@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import sys
import base64
import prne_txtrec
# Error definitions
HOOK_ERRORS = {
"NOT_IMPL": {
"msg": "not implemented",
"ec": 1
},
"AWS_NO_BOTO3": {
"msg": "Please install Boto3 for AWS hook",
"ec": 1
},
"INV_ARG": {
"msg": "invalid argument",
"ec": 2
}
}
def main_aws (zone_id: str, head_rec: str, suffix: str, ttl: int):
"""AWS hook main function"""
if ttl is None:
ttl = 3600
try:
import boto3
except ModuleNotFoundError as e:
prne_txtrec.handle_err(HOOK_ERRORS["AWS_NO_BOTO3"], e)
client = boto3.client("route53")
ins_q = [] # List of RRs to be inserted
cnt = 0
# process the queued request and clear the queue
def flush_q ():
prne_txtrec.change_all(client, zone_id, 'UPSERT', ins_q)
ins_q.clear()
while True:
b = sys.stdin.buffer.read(189)
if not b: # Assume that EOF is reached
break
ins_q.append({
'Name': "%08u" % (cnt) + suffix,
'Type': 'TXT',
'TTL': ttl,
'ResourceRecords': [
{ 'Value': '"' + base64.b64encode(b).decode('ascii') + '"' }
]
})
cnt = cnt + 1
if len(ins_q) >= prne_txtrec.AWS_MAX_ITEMS:
flush_q()
flush_q()
head_rr = "%08u" % (cnt) + suffix
# insert the head rec
prne_txtrec.change_all(
client,
zone_id,
'UPSERT',
[{
'Name': head_rec,
'Type': 'TXT',
'TTL': ttl,
'ResourceRecords': [
{ 'Value': '"' + head_rr + '"' }
]
}])
HOOKS = {
"aws": main_aws
}
USAGE_LINES = [
"Usage: " + sys.argv[0] + " <head rec> <suffix> <hook> <zone id> [TTL]\n",
"Hooks:\n"
]
for h in HOOKS:
USAGE_LINES.append(" " + h + "\n")
def print_usage (out):
out.writelines(USAGE_LINES)
# proecss argv
try:
ARGV_DICT = {
"head_rec": prne_txtrec.termdot(sys.argv[1].lower()),
"suffix": prne_txtrec.termdot(sys.argv[2].lower()),
"hook": sys.argv[3].lower(),
"zone_id": sys.argv[4]
}
if len(sys.argv) >= 6:
try:
ARGV_DICT["ttl"] = int(sys.argv[5])
if not (ARGV_DICT["ttl"] in range(0, 2147483648)):
raise ValueError()
except ValueError:
prne_txtrec.handle_err(HOOK_ERRORS["INV_ARG"], None, sys.argv[5])
else:
ARGV_DICT["ttl"] = None
except IndexError:
print_usage(sys.stderr)
exit(1)
# call the function
try:
HOOKS[ARGV_DICT["hook"]](
ARGV_DICT["zone_id"],
ARGV_DICT["head_rec"],
ARGV_DICT["suffix"],
ARGV_DICT["ttl"])
except KeyError:
prne_txtrec.handle_err(HOOK_ERRORS["NOT_IMPL"], None, ARGV_DICT["hook"])
exit(0)
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