Project

General

Profile

Download (11.4 KB) Statistics
| Branch: | Tag: | Revision:
55a68712 Marc Dequenes
#!/usr/bin/ruby -Ku

d32ee48a Marc Dequenes
#--
# CyborgHood, a distributed system management software.
# Copyright (c) 2009 Marc Dequènes (Duck) <Duck@DuckCorp.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#++

55a68712 Marc Dequenes
# http://www.ruby-doc.org/stdlib/libdoc/net/imap/rdoc/index.html

2f325370 Marc Dequenes
Dir.chdir(File.dirname(File.expand_path(__FILE__)))
55a68712 Marc Dequenes
$: << "./lib"

#require 'socket'
157c68c9 Marc Dequenes
require 'tempfile'
55a68712 Marc Dequenes
require 'shellwords'
bc4894ce Marc Dequenes
require 'cyborghood/imap'
c427bfc7 Marc Dequenes
require 'cyborghood/mail'
bc4894ce Marc Dequenes
require 'cyborghood/objects'
4153cce4 Marc Dequenes
require 'cyborghood/services/dns'
fba691ae Marc Dequenes
require 'fileutils'
3f7a1eee Marc Dequenes
55a68712 Marc Dequenes
#Socket.gethostname

dfc48308 Marc Dequenes
module CyborgHood
class CommandParser
def self.run(order)
result_list = []
order.commands.each do |cmdstr|
logger.info "Executing command: #{cmdstr}"
begin
result = execute_cmd(order.user, cmdstr, order.refs)
if result.nil?
result = OpenStruct.new
result.cmd = cmdstr
result.ok = false
result.message = "Command not recognized."
result.refs = nil
end
rescue CyberError => e
result = OpenStruct.new
result.cmd = cmdstr
result.ok = false
result.message = e.message.capitalize + "."
result.refs = nil
rescue
logger.warn "Command crashed: " + $!
result = OpenStruct.new
result.cmd = cmdstr
result.ok = false
result.message = "Internal error. Administrator is warned."
result.refs = nil
end

tag = result.ok ? "SUCCESS" :"FAILURE"
logger.debug "Command result: [#{tag}] #{result.message}"
result_list << result
3f7a1eee Marc Dequenes
end
dfc48308 Marc Dequenes
result_list
55a68712 Marc Dequenes
end

dfc48308 Marc Dequenes
private
55a68712 Marc Dequenes
dfc48308 Marc Dequenes
def self.execute_cmd(user, cmdstr, refs)
cmdline = Shellwords.shellwords(cmdstr)
subsys = cmdline.shift
55a68712 Marc Dequenes
dfc48308 Marc Dequenes
result = OpenStruct.new
result.cmd = cmdstr
result.ok = false
ok = true
case subsys.upcase
when "DNS"
return if cmdline.empty?
case cmdline.shift.upcase
when "INFO"
return unless cmdline.empty?
c427bfc7 Marc Dequenes
list = CyborgHood::DnsDomain.find_by_manager(user)
4153cce4 Marc Dequenes
txt_list = list.collect{|z| z.cn }.sort.join(", ")
dfc48308 Marc Dequenes
result.ok = true
result.message = "You are manager of the following zones: #{txt_list}."
when "GET"
return if cmdline.empty?
case cmdline.shift.upcase
when "ZONE"
return if cmdline.empty?
zone = cmdline.shift.downcase

dom = CyborgHood::DnsDomain.new(zone)
unless dom.hosted?
result.message = "This zone is not hosted here."
return result
end
unless dom.managed_by? user
4153cce4 Marc Dequenes
result.message = "You are not allowed to manage this zone."
dfc48308 Marc Dequenes
return result
591ec1a2 Marc Dequenes
end
dfc48308 Marc Dequenes
srv_dns = CyborgHood::Services::DNS.new(zone)
result.ok = true
result.message = "Requested zone content attached."
zone_ref = {:content => srv_dns.read_zone, :filename => "dnszone_#{zone}.txt"}.to_ostruct
result.refs = [zone_ref]
591ec1a2 Marc Dequenes
end
dfc48308 Marc Dequenes
when "SET"
return if cmdline.empty?
case cmdline.shift.upcase
when "ZONE"
return if cmdline.empty?
zone = cmdline.shift.downcase
dom = CyborgHood::DnsDomain.new(zone)
unless dom.hosted?
result.message = "This zone is not hosted here."
return result
end
unless dom.managed_by? user
result.message = "You are not allowed to manage this zone."
return result
end
srv_dns = CyborgHood::Services::DNS.new(zone)

return if cmdline.empty?
content_ref = cmdline.shift.downcase
return unless content_ref =~ /^@(\d+)$/
part_ref = $1.to_i
unless (1..refs.size).include? part_ref
result.message = "Attachment number not found."
return result
end
part = refs[part_ref]
unless part.content_type == "text/plain"
result.message = "Attachment has wrong content-type."
return result
end

f = Tempfile.new(zone)
f.write(part.body)
f.close
logger.debug "Created temporary zone file '#{f.path}'"

srv_dns = CyborgHood::Services::DNS.new(zone)
current_serial = srv_dns.serial
logger.debug "Current serial: #{current_serial}"

dns_result = srv_dns.check_zone_file(f.path)
unless dns_result.ok
result.message = "Invalid zone data."
f.close!
return result
end
logger.debug "New serial: #{dns_result.serial}"
# allow new serial or missing serial (to allow creating a new zone or replacing a broken zone)
unless current_serial.nil? or dns_result.serial > current_serial
result.message = "Zone serial is not superior to current serial."
f.close!
return result
end

begin
srv_dns.write_zone_from_file(f.path)
logger.debug "zone changed"
if srv_dns.reload_zone
logger.debug "zone reloaded"
result.ok = true
result.message = "Zone updated."
157c68c9 Marc Dequenes
else
dfc48308 Marc Dequenes
logger.warn "zone reload failed, replacing old content"
srv_dns.replace_zone_with_backup
result.message = "Internal error. Administrator is warned."
157c68c9 Marc Dequenes
end
dfc48308 Marc Dequenes
rescue
logger.warn "Writing zone file failed"
raise
ensure
f.close!
157c68c9 Marc Dequenes
end
end
end
55a68712 Marc Dequenes
end

dfc48308 Marc Dequenes
if result.message.nil?
# here fall lost souls
nil
else
result
end
55a68712 Marc Dequenes
end
end
4153cce4 Marc Dequenes
55a68712 Marc Dequenes
# not yet ready to be a real Cyborg
class Postman #< Cyborg
def initialize
# load config
Config.load(self.human_name.downcase)
@config = Config.instance

0af9cada Marc Dequenes
ldap_config = @config.ldap
ldap_config.logger = logger
ActiveLdap::Base.establish_connection(ldap_config.marshal_dump)

55a68712 Marc Dequenes
# setup logs
unless @config.log.nil?
logger.output_level(@config.log.console_level) unless @config.log.console_level.nil?
logger.log_to_file(@config.log.file) unless @config.log.file.nil?
end

960373b7 Marc Dequenes
@current_thread = Thread.current
125a6103 Marc Dequenes
@stop_asap = false
960373b7 Marc Dequenes
@waiting = false
125a6103 Marc Dequenes
55a68712 Marc Dequenes
logger.info "Bot '#{self.human_name}' loaded"
end

def run
945de171 Marc Dequenes
imap = IMAP.new(@config.imap)
960373b7 Marc Dequenes
until @stop_asap
t = Time.now.to_i
logger.debug "Starting mail check"
check_mails(imap)
logger.debug "Mail check finished"
t2 = Time.now.to_i
sleep_time = @config.imap.min_check_interval - (t2 - t)
if sleep_time > 0
logger.debug "Having a break before new check..."
@waiting = true
begin
sleep(sleep_time)
rescue
end
@waiting = false
end
end
logger.info "Bot was asked to stop..." if @stop_asap
logger.info "Bot terminating"
end

def check_mails(imap)
945de171 Marc Dequenes
imap.check_mail do |msg|
125a6103 Marc Dequenes
if @stop_asap
logger.info "Bot was asked to stop..."
break
end

d5a19360 Marc Dequenes
mail = Mail.new(msg.content)
275e20ec Marc Dequenes
logger.info "Received mail with ID '#{mail.message_id}': #{mail.from_addrs} -> #{mail.to_addrs} (#{mail.subject})"
c427bfc7 Marc Dequenes
960c259e Marc Dequenes
# ignore mails not signed or encrypted
unless mail.is_pgp_signed? or mail.is_pgp_encrypted?
logger.info "Mail not signed/encrypted or not RFC3156 compliant, ignoring..."
d5a19360 Marc Dequenes
msg.delete
55a68712 Marc Dequenes
next
591ec1a2 Marc Dequenes
end
55a68712 Marc Dequenes
960c259e Marc Dequenes
logger.debug "RFC3156 content detected"
c427bfc7 Marc Dequenes
begin
order = mail.parse
rescue CyberError => e
945de171 Marc Dequenes
case e.severity
when :dangerous
logger.fatal " (#{e.message})"
exit 2
when :unrecoverable
logger.error "Internal processing error, skipping mail (#{e.message})"
next
when :ignorable
end
55a68712 Marc Dequenes
end
c427bfc7 Marc Dequenes
if order.nil?
logger.info "Mail is invalid, ignoring..."
d5a19360 Marc Dequenes
msg.delete
c427bfc7 Marc Dequenes
next
7193ea94 Marc Dequenes
elsif not order.ok
960c259e Marc Dequenes
logger.info "Sending reply for rejected message (#{order.msg})"
7193ea94 Marc Dequenes
mail_reply = mail.create_reply
09b32d70 Marc Dequenes
mail_reply.set_content_type("text", "plain", {'charset' => "utf-8"})
mail_reply.set_disposition("inline")
7193ea94 Marc Dequenes
mail_reply.quoted_printable_body = "A message (ID: #{mail.message_id}) apparently from you was rejected for the following reason:\n #{order.msg}"
09b32d70 Marc Dequenes
mail_reply.sign
abf4f28f Marc Dequenes
mail_reply.crypt(order.user.keyFingerPrint) unless order.user.nil?
7193ea94 Marc Dequenes
mail_reply.deliver
d5a19360 Marc Dequenes
msg.delete
7193ea94 Marc Dequenes
next
c427bfc7 Marc Dequenes
end

960373b7 Marc Dequenes
logger.debug "Message accepted, processing orders..."
4153cce4 Marc Dequenes
result_list = CommandParser.run(order)
275e20ec Marc Dequenes
09b32d70 Marc Dequenes
# create transcript
logger.debug "Preparing reply"
4153cce4 Marc Dequenes
reply_txt = "Hello #{order.user.cn},\n\nFollows the transcript of your commands:\n"
reply_attachments = []
result_list.each do |result|
reply_txt << "> #{result.cmd}\n"
reply_txt << "#{result.message}\n"
reply_attachments += result.refs unless result.refs.nil?
end
09b32d70 Marc Dequenes
# create mail
logger.debug "Preparing mail"
mail_reply = mail.create_reply
4153cce4 Marc Dequenes
if reply_attachments.empty?
09b32d70 Marc Dequenes
transcript_part = mail_reply
4153cce4 Marc Dequenes
else
56793619 Marc Dequenes
mail_reply.set_content_type("multipart", "mixed", {'boundary' => TMail.new_boundary})
4153cce4 Marc Dequenes
parts = []

30406d66 Marc Dequenes
p = CyborgHood::Mail.new
09b32d70 Marc Dequenes
transcript_part = p
4153cce4 Marc Dequenes
mail_reply.parts << p

reply_attachments.each do |attachment|
30406d66 Marc Dequenes
p = CyborgHood::Mail.new
4153cce4 Marc Dequenes
p.set_content_type("text", "plain", {'charset' => "utf-8"})
43dd8a57 Marc Dequenes
p.set_disposition("attachment", {'filename' => attachment.filename})
p.quoted_printable_body = attachment.content
4153cce4 Marc Dequenes
mail_reply.parts << p
end
56793619 Marc Dequenes
end
09b32d70 Marc Dequenes
# insert transcript
transcript_part.set_content_type("text", "plain", {'charset' => 'utf-8', 'format' => 'flowed'})
transcript_part.set_disposition("inline")
transcript_part.quoted_printable_body = reply_txt

# send reply
logger.debug "Sending mail"
mail_reply.sign_and_crypt(order.user.keyFingerPrint)
275e20ec Marc Dequenes
mail_reply.deliver
d5a19360 Marc Dequenes
09b32d70 Marc Dequenes
logger.info "Message processed completely, deleting"
d5a19360 Marc Dequenes
msg.delete
55a68712 Marc Dequenes
end
end

def ask_to_stop
125a6103 Marc Dequenes
@stop_asap = true
960373b7 Marc Dequenes
Thread.critical = true
@current_thread.raise if @waiting
Thread.critical = false
55a68712 Marc Dequenes
end
end
end

bot = CyborgHood::Postman.new

trap('INT') do
bot.ask_to_stop
end
trap('TERM') do
bot.ask_to_stop
end

bot.run