diff --git a/agent/core.py b/agent/core.py
new file mode 100644
index 0000000..748042d
--- /dev/null
+++ b/agent/core.py
@@ -0,0 +1,79 @@
+# -*- coding: utf8 -*-
+from abc import ABCMeta, abstractmethod
+from structs import AbonStruct, TariffStruct
+
+
+# Всплывает если из NAS вернулся не удачный результат
+class NasFailedResult(BaseException):
+    pass
+
+
+# Проверяет входной тип на принадлежность классу.
+# Можно передать объект или коллекцию объектов
+# В общем желание организовать строгую типизацию :)
+def check_input_type(class_or_type):
+    def real_check(fn):
+        def wrapped(self, user):
+            try:
+                for usr in user:
+                    assert isinstance(usr, class_or_type)
+            except TypeError:
+                assert isinstance(user, class_or_type)
+            return fn(self, user)
+        return wrapped
+    return real_check
+
+
+# Общается с NAS'ом
+class BaseTransmitter(object):
+    __metaclass__ = ABCMeta
+
+    @abstractmethod
+    @check_input_type(AbonStruct)
+    def add_user_range(self, user_list):
+        """добавляем список абонентов в NAS"""
+
+    @abstractmethod
+    @check_input_type(AbonStruct)
+    def remove_user_range(self, user_list):
+        """удаляем список абонентов"""
+
+    @abstractmethod
+    @check_input_type(AbonStruct)
+    def add_user(self, user):
+        """добавляем абонента"""
+
+    @abstractmethod
+    @check_input_type(AbonStruct)
+    def remove_user(self, user):
+        """удаляем абонента"""
+
+    @abstractmethod
+    @check_input_type(AbonStruct)
+    def update_user(self, user):
+        """чтоб обновить абонента надо изменить всё кроме его uid, по uid абонент будет найден"""
+
+    @abstractmethod
+    @check_input_type(TariffStruct)
+    def add_tariff_range(self, tariff_list):
+        """добавляем список тарифов в NAS"""
+
+    @abstractmethod
+    @check_input_type(TariffStruct)
+    def remove_tariff_range(self, tariff_list):
+        """удаляем список тарифов по уникальным идентификаторам"""
+
+    @abstractmethod
+    @check_input_type(TariffStruct)
+    def add_tariff(self, tariff):
+        """добавляем тариф"""
+
+    @abstractmethod
+    @check_input_type(TariffStruct)
+    def update_tariff(self, tariff):
+        """чтоб обновить тариф надо изменить всё кроме его tid, по tid тариф будет найден"""
+
+    @abstractmethod
+    @check_input_type(TariffStruct)
+    def remove_tariff(self, tid):
+        """удаляем тариф"""
diff --git a/agent/mod_mikrotik.py b/agent/mod_mikrotik.py
new file mode 100644
index 0000000..5d98a30
--- /dev/null
+++ b/agent/mod_mikrotik.py
@@ -0,0 +1,211 @@
+# -*- coding: utf-8 -*-
+import socket
+import binascii
+from hashlib import md5
+from core import BaseTransmitter, NasFailedResult
+from structs import TariffStruct, IpStruct
+
+
+class ApiRos:
+    "Routeros api"
+
+    def __init__(self, sk):
+        self.sk = sk
+        self.currenttag = 0
+
+    def login(self, username, pwd):
+        for repl, attrs in self.talk(["/login"]):
+            chal = binascii.unhexlify(attrs['=ret'])
+        md = md5()
+        md.update('\x00')
+        md.update(pwd)
+        md.update(chal)
+        self.talk(["/login", "=name=" + username,
+                   "=response=00" + binascii.hexlify(md.digest())])
+
+    def talk(self, words):
+        if self.writeSentence(words) == 0: return
+        r = []
+        while 1:
+            i = self.readSentence()
+            if len(i) == 0: continue
+            reply = i[0]
+            attrs = {}
+            for w in i[1:]:
+                j = w.find('=', 1)
+                if j == -1:
+                    attrs[w] = ''
+                else:
+                    attrs[w[:j]] = w[j + 1:]
+            r.append((reply, attrs))
+            if reply == '!done': return r
+
+    def writeSentence(self, words):
+        ret = 0
+        for w in words:
+            self.writeWord(w)
+            ret += 1
+        self.writeWord('')
+        return ret
+
+    def readSentence(self):
+        r = []
+        while 1:
+            w = self.readWord()
+            if w == '': return r
+            r.append(w)
+
+    def writeWord(self, w):
+        print "<<< " + w
+        self.writeLen(len(w))
+        self.writeStr(w)
+
+    def readWord(self):
+        ret = self.readStr(self.readLen())
+        print ">>> " + ret
+        return ret
+
+    def writeLen(self, l):
+        if l < 0x80:
+            self.writeStr(chr(l))
+        elif l < 0x4000:
+            l |= 0x8000
+            self.writeStr(chr((l >> 8) & 0xFF))
+            self.writeStr(chr(l & 0xFF))
+        elif l < 0x200000:
+            l |= 0xC00000
+            self.writeStr(chr((l >> 16) & 0xFF))
+            self.writeStr(chr((l >> 8) & 0xFF))
+            self.writeStr(chr(l & 0xFF))
+        elif l < 0x10000000:
+            l |= 0xE0000000
+            self.writeStr(chr((l >> 24) & 0xFF))
+            self.writeStr(chr((l >> 16) & 0xFF))
+            self.writeStr(chr((l >> 8) & 0xFF))
+            self.writeStr(chr(l & 0xFF))
+        else:
+            self.writeStr(chr(0xF0))
+            self.writeStr(chr((l >> 24) & 0xFF))
+            self.writeStr(chr((l >> 16) & 0xFF))
+            self.writeStr(chr((l >> 8) & 0xFF))
+            self.writeStr(chr(l & 0xFF))
+
+    def readLen(self):
+        c = ord(self.readStr(1))
+        if (c & 0x80) == 0x00:
+            pass
+        elif (c & 0xC0) == 0x80:
+            c &= ~0xC0
+            c <<= 8
+            c += ord(self.readStr(1))
+        elif (c & 0xE0) == 0xC0:
+            c &= ~0xE0
+            c <<= 8
+            c += ord(self.readStr(1))
+            c <<= 8
+            c += ord(self.readStr(1))
+        elif (c & 0xF0) == 0xE0:
+            c &= ~0xF0
+            c <<= 8
+            c += ord(self.readStr(1))
+            c <<= 8
+            c += ord(self.readStr(1))
+            c <<= 8
+            c += ord(self.readStr(1))
+        elif (c & 0xF8) == 0xF0:
+            c = ord(self.readStr(1))
+            c <<= 8
+            c += ord(self.readStr(1))
+            c <<= 8
+            c += ord(self.readStr(1))
+            c <<= 8
+            c += ord(self.readStr(1))
+        return c
+
+    def writeStr(self, text):
+        n = 0
+        while n < len(text):
+            r = self.sk.send(text[n:])
+            if r == 0: raise RuntimeError, "connection closed by remote end"
+            n += r
+
+    def readStr(self, length):
+        ret = ''
+        while len(ret) < length:
+            s = self.sk.recv(length - len(ret))
+            if s == '': raise RuntimeError, "connection closed by remote end"
+            ret += s
+        return ret
+
+
+class MikrotikTransmitter(BaseTransmitter):
+    def __init__(self, login, password, ip, port=8728):
+        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        s.connect((ip, port))
+        self.ar = ApiRos(s)
+        self.ar.login(login, password)
+
+    def _exec_cmd(self, cmd):
+        assert isinstance(cmd, list)
+        result = self.ar.talk(cmd)
+        for rt in result:
+            if rt[0] == '!trap':
+                raise NasFailedResult, rt[1]['=message']
+        return result
+
+    # ищем правило по имени, и возвращаем всю инфу о найденном правиле
+    def _find_queue(self, name):
+        ret = self._exec_cmd(['/queue/simple/print', '?name=%s' % name])
+        return ret[0][1]
+
+    def add_user_range(self, user_list):
+        return map(self.add_user, user_list)
+
+    def remove_user_range(self, user_list):
+        names = ['uid%d' % usr.uid for usr in user_list]
+        return self._exec_cmd(['/queue/simple/remove', '=.id=%s' % ','.join(names)])
+
+    # добавляем правило шейпинга для указанного ip и со скоростью max-limit=Upload/Download
+    # Мы уверены что user это инстанс класса agent.structs.AbonStruct
+    def add_user(self, user):
+        assert isinstance(user.tariff, TariffStruct)
+        assert isinstance(user.ip, IpStruct)
+        return self._exec_cmd(['/queue/simple/add',
+            '=name=uid%d' % user.uid,
+            '=target=%s/32' % user.ip.get_str(),
+            '=max-limit=%fM/%fM' % (user.tariff.speedOut, user.tariff.speedIn)
+        ])
+
+    # удаляем правило шейпера по имени правила
+    def remove_user(self, user):
+        uid = user if type(user) is int else user.uid
+        self._exec_cmd(['/queue/simple/remove', '=.id=uid%d' % uid])
+
+    # обновляем основную инфу абонента
+    def update_user(self, user):
+        assert isinstance(user.tariff, TariffStruct)
+        assert isinstance(user.ip, IpStruct)
+        self._exec_cmd(['/queue/simple/set', '=.id=uid%d' % user.uid,
+            '=max-limit=%fM/%fM' % (user.tariff.speedOut, user.tariff.speedIn),
+            '=target=%s/32' % user.ip.get_str()
+        ])
+
+    # Тарифы хранить нам не надо, так что методы тарифов ниже не реализуем
+    def add_tariff_range(self, tariff_list):
+        pass
+
+    # todo: реальзовать
+    def remove_tariff_range(self, tariff_list):
+        pass
+
+    # todo: реальзовать
+    def add_tariff(self, tariff):
+        pass
+
+    # todo: реальзовать
+    def update_tariff(self, tariff):
+        pass
+
+    # todo: реальзовать
+    def remove_tariff(self, tid):
+        pass
diff --git a/agent/structs.py b/agent/structs.py
new file mode 100644
index 0000000..3049ae0
--- /dev/null
+++ b/agent/structs.py
@@ -0,0 +1,78 @@
+# -*- coding: utf8 -*-
+from abc import ABCMeta, abstractmethod
+from struct import pack, unpack
+from utils import int2ip, ip2int
+
+
+class BaseStruct(object):
+    __metaclass__ = ABCMeta
+
+    @abstractmethod
+    def serialize(self):
+        """привращаем инфу в бинарную строку"""
+
+    @abstractmethod
+    def deserialize(self, data, *args):
+        """создаём объект из бинарной строки"""
+
+
+class IpStruct(object):
+
+    def __init__(self, ip):
+        if type(ip) is int:
+            self.__ip = ip
+        else:
+            self.__ip = ip2int(ip)
+
+    def get_str(self):
+        return int2ip(self.__ip)
+
+    def get_int(self):
+        return self.__ip
+
+
+# Как обслуживается абонент
+class TariffStruct(BaseStruct):
+
+    def __init__(self, tariff_id=0, speedIn=None, speedOut=None):
+        self.tid = tariff_id
+        self.speedIn = speedIn
+        self.speedOut = speedOut
+
+    def serialize(self):
+        dt = pack("!Iff", int(self.tid), float(self.speedIn), float(self.speedOut))
+        return dt
+
+    def deserialize(self, data, *args):
+        dt = unpack("!Iff", data)
+        self.tid = int(dt[0])
+        self.speedIn = float(dt[1])
+        self.speedOut = float(dt[2])
+        return self
+
+
+# Абонент из базы
+class AbonStruct(BaseStruct):
+
+    def __init__(self, uid=None, ip=None, tariff=None):
+        self.uid = long(uid)
+        self.ip = IpStruct(ip)
+        assert isinstance(tariff, TariffStruct)
+        self.tariff = tariff
+
+    def serialize(self):
+        assert isinstance(self.tariff, TariffStruct)
+        assert isinstance(self.ip, IpStruct)
+        dt = pack("!LII", self.uid, self.ip.get_int(), self.tariff.tid)
+        return dt
+
+    def deserialize(self, data, all_tarifs=None):
+        dt = unpack("!LII", data)
+        self.uid = dt[0]
+        self.ip = IpStruct(dt[1])
+        tarifs = filter(lambda trf: trf.tid == dt[2], all_tarifs)
+        if len(tarifs) < 1:
+            raise IndexError
+        assert isinstance(tarifs[0], TariffStruct)
+        self.tariff = tarifs[0]
+        return self
diff --git a/agent/utils.py b/agent/utils.py
new file mode 100644
index 0000000..d36a69a
--- /dev/null
+++ b/agent/utils.py
@@ -0,0 +1,17 @@
+# -*- coding: utf8 -*-
+import socket
+import struct
+
+
+def ip2int(addr):
+    try:
+        return struct.unpack("!I", socket.inet_aton(addr))[0]
+    except:
+        return 0
+
+
+def int2ip(addr):
+    try:
+        return socket.inet_ntoa(struct.pack("!I", addr))
+    except:
+        return ''