|
1
|
|
|
"""For packets received by the datapath and sent to the controller.""" |
|
2
|
|
|
|
|
3
|
|
|
# System imports |
|
4
|
1 |
|
from enum import IntEnum |
|
5
|
|
|
|
|
6
|
1 |
|
from pyof.foundation.base import GenericMessage |
|
7
|
1 |
|
from pyof.foundation.basic_types import ( |
|
8
|
|
|
BinaryData, Pad, UBInt8, UBInt16, UBInt32) |
|
9
|
1 |
|
from pyof.v0x01.common.constants import NO_BUFFER |
|
10
|
1 |
|
from pyof.v0x01.common.header import Header, Type |
|
11
|
|
|
|
|
12
|
|
|
# Third-party imports |
|
13
|
|
|
|
|
14
|
|
|
|
|
15
|
1 |
|
__all__ = ('PacketIn', 'PacketInReason') |
|
16
|
|
|
|
|
17
|
|
|
# Enums |
|
18
|
|
|
|
|
19
|
|
|
|
|
20
|
1 |
|
class PacketInReason(IntEnum): |
|
21
|
|
|
"""Reason why this packet is being sent to the controller.""" |
|
22
|
|
|
|
|
23
|
|
|
#: No matching flow |
|
24
|
1 |
|
OFPR_NO_MATCH = 0 |
|
25
|
|
|
#: Action explicitly output to controller |
|
26
|
1 |
|
OFPR_ACTION = 1 |
|
27
|
|
|
|
|
28
|
|
|
|
|
29
|
|
|
# Classes |
|
30
|
|
|
|
|
31
|
|
|
|
|
32
|
1 |
|
class PacketIn(GenericMessage): |
|
33
|
|
|
"""Packet received on port (datapath -> controller).""" |
|
34
|
|
|
|
|
35
|
|
|
#: :class:`~pyof.v0x01.common.header.Header`: OpenFlow Header |
|
36
|
1 |
|
header = Header(message_type=Type.OFPT_PACKET_IN) |
|
37
|
1 |
|
buffer_id = UBInt32() |
|
38
|
1 |
|
total_len = UBInt16() |
|
39
|
1 |
|
in_port = UBInt16() |
|
40
|
1 |
|
reason = UBInt8(enum_ref=PacketInReason) |
|
41
|
|
|
#: Align to 32-bits. |
|
42
|
1 |
|
pad = Pad(1) |
|
43
|
1 |
|
data = BinaryData() |
|
44
|
|
|
|
|
45
|
1 |
|
def __init__(self, xid=None, buffer_id=NO_BUFFER, total_len=None, |
|
46
|
|
|
in_port=None, reason=None, data=b''): |
|
47
|
|
|
"""Assign parameters to object attributes. |
|
48
|
|
|
|
|
49
|
|
|
Args: |
|
50
|
|
|
xid (int): Header's xid. |
|
51
|
|
|
buffer_id (int): ID assigned by datapath. |
|
52
|
|
|
total_len (int): Full length of frame. |
|
53
|
|
|
in_port (int): Port on which frame was received. |
|
54
|
|
|
reason (~pyof.v0x01.asynchronous.packet_in.PacketInReason): |
|
55
|
|
|
The reason why the packet is being sent |
|
56
|
|
|
data (bytes): Ethernet frame, halfway through 32-bit word, so the |
|
57
|
|
|
IP header is 32-bit aligned. The amount of data is inferred |
|
58
|
|
|
from the length field in the header. Because of padding, |
|
59
|
|
|
offsetof(struct ofp_packet_in, data) == |
|
60
|
|
|
sizeof(struct ofp_packet_in) - 2. |
|
61
|
|
|
""" |
|
62
|
1 |
|
super().__init__(xid) |
|
63
|
1 |
|
self.buffer_id = buffer_id |
|
64
|
1 |
|
self.total_len = total_len |
|
65
|
1 |
|
self.in_port = in_port |
|
66
|
1 |
|
self.reason = reason |
|
67
|
|
|
self.data = data |
|
68
|
|
|
|
kytos /
python-openflow
