1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
# $Id: vrrp.py 88 2013-03-05 19:43:17Z andrewflnr@gmail.com $
# -*- coding: utf-8 -*-
"""Virtual Router Redundancy Protocol."""
import dpkt
from decorators import deprecated
class VRRP(dpkt.Packet):
__hdr__ = (
('vtype', 'B', 0x21),
('vrid', 'B', 0),
('priority', 'B', 0),
('count', 'B', 0),
('atype', 'B', 0),
('advtime', 'B', 0),
('sum', 'H', 0),
)
addrs = ()
auth = ''
@property
def v(self):
return self.vtype >> 4
@v.setter
def v(self, v):
self.vtype = (self.vtype & ~0xf) | (v << 4)
@property
def type(self):
return self.vtype & 0xf
@type.setter
def type(self, v):
self.vtype = (self.vtype & ~0xf0) | (v & 0xf)
# Deprecated methods, will be removed in the future
# =================================================
@deprecated
def _get_v(self): return self.v
@deprecated
def _set_v(self, v): self.v = v
@deprecated
def _get_type(self): return self.type
@deprecated
def _set_type(self, v): self.type = v
# =================================================
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
l = []
off = 0
for off in range(0, 4 * self.count, 4):
l.append(self.data[off:off + 4])
self.addrs = l
self.auth = self.data[off + 4:]
self.data = ''
def __len__(self):
return self.__hdr_len__ + (4 * self.count) + len(self.auth)
def __str__(self):
data = ''.join(self.addrs) + self.auth
if not self.sum:
self.sum = dpkt.in_cksum(self.pack_hdr() + data)
return self.pack_hdr() + data
|