From 5e1ae35034330f4627ef8e83f0884914a8f880d2 Mon Sep 17 00:00:00 2001 From: Maxim Biro Date: Wed, 9 Jul 2014 14:00:16 -0400 Subject: Added a script to query DHT bootstrap node info --- other/fun/bootstrap_node_info.py | 98 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 other/fun/bootstrap_node_info.py (limited to 'other/fun/bootstrap_node_info.py') diff --git a/other/fun/bootstrap_node_info.py b/other/fun/bootstrap_node_info.py new file mode 100644 index 00000000..17349334 --- /dev/null +++ b/other/fun/bootstrap_node_info.py @@ -0,0 +1,98 @@ +#!/usr/bin/env python +""" +Copyright (c) 2014 by nurupo + +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. +""" + +from socket import * +import sys + +if sys.version_info[0] == 2: + print("This script requires Python 3+ in order to run.") + sys.exit(1) + +def printHelp(): + print("Usage: " + sys.argv[0] + " ") + print(" Example: " + sys.argv[0] + " ipv4 192.210.149.121 33445") + print(" Example: " + sys.argv[0] + " ipv4 23.226.230.47 33445") + print(" Example: " + sys.argv[0] + " ipv4 biribiri.org 33445") + print(" Example: " + sys.argv[0] + " ipv4 cerberus.zodiaclabs.org 33445") + print(" Example: " + sys.argv[0] + " ipv6 2604:180:1::3ded:b280 33445") + print("") + print("Return values:") + print(" 0 - received info reply from a node") + print(" 1 - incorrect command line arguments") + print(" 2 - didn't receive any reply from a node") + print(" 3 - received a malformed/unexpected reply") + +if len(sys.argv) != 4: + printHelp() + sys.exit(1) + +protocol = sys.argv[1] +ip = sys.argv[2] +port = int(sys.argv[3]) + +INFO_PACKET_ID = b"\xF0" # https://github.com/irungentoo/toxcore/blob/4940c4c62b6014d1f0586aa6aca7bf6e4ecfcf29/toxcore/network.h#L128 +INFO_REQUEST_PACKET_LENGTH = 78 # https://github.com/irungentoo/toxcore/blob/881b2d900d1998981fb6b9938ec66012d049635f/other/bootstrap_node_packets.c#L28 +# first byte is INFO_REQUEST_ID, other bytes don't matter as long as reqest's length matches INFO_REQUEST_LENGTH +INFO_REQUEST_PACKET = INFO_PACKET_ID + ( b"0" * (INFO_REQUEST_PACKET_LENGTH - len(INFO_PACKET_ID)) ) + +PACKET_ID_LENGTH = len(INFO_PACKET_ID) +VERSION_LENGTH = 4 # https://github.com/irungentoo/toxcore/blob/881b2d900d1998981fb6b9938ec66012d049635f/other/bootstrap_node_packets.c#L44 +MAX_MOTD_LENGTH = 256 # https://github.com/irungentoo/toxcore/blob/881b2d900d1998981fb6b9938ec66012d049635f/other/bootstrap_node_packets.c#L26 + +MAX_INFO_RESPONSE_PACKET_LENGTH = PACKET_ID_LENGTH + VERSION_LENGTH + MAX_MOTD_LENGTH + +SOCK_TIMEOUT_SECONDS = 1.0 + +sock = None + +if protocol == "ipv4": + sock = socket(AF_INET, SOCK_DGRAM) +elif protocol == "ipv6": + sock = socket(AF_INET6, SOCK_DGRAM) +else: + print("Invalid first argument") + printHelp() + sys.exit(1) + +sock.sendto(INFO_REQUEST_PACKET, (ip, port)) + +sock.settimeout(SOCK_TIMEOUT_SECONDS) + +try: + data, addr = sock.recvfrom(MAX_INFO_RESPONSE_PACKET_LENGTH) +except timeout: + print("The DHT bootstrap node didn't reply in " + str(SOCK_TIMEOUT_SECONDS) + " sec.") + print("The likely reason for that is that the DHT bootstrap node is either offline or has no info set.") + sys.exit(2) + +packetId = data[:PACKET_ID_LENGTH] +if packetId != INFO_PACKET_ID: + print("Bad response, first byte should be", INFO_PACKET_ID, "but got", packetId, "(", data, ")") + print("Are you sure that you are pointing the script at a Tox DHT bootstrap node and that the script is up to date?") + sys.exit(3) + +version = int.from_bytes(data[PACKET_ID_LENGTH:PACKET_ID_LENGTH + VERSION_LENGTH], byteorder='big') +motd = data[PACKET_ID_LENGTH + VERSION_LENGTH:].decode("utf-8") +print("Version: " + str(version)) +print("MOTD: " + motd) +sys.exit(0) \ No newline at end of file -- cgit v1.2.3