blob: cf6b2efffe642f66e5270c0d11d43d4c2206ac2a (
plain)
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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/*
Copyright (c) 2015-2015 Cisco Systems, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef _VLAN_HEADER_H_
#define _VLAN_HEADER_H_
#include "PacketHeaderBase.h"
#include "EthernetHeader.h"
/*
VLAN Header Fields
------------------
0 2 3 4 15
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
|Priority| CFI | |
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
| Type |
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
*/
/**
* This class encapsulates a VLAN header.
* It has fields that are equivalent to the VLAN header fields.
* The data is saved in network byte order, and therefore the class can be used to create a packet in a buffer
* and send it over the network.
*/
class VLANHeader
{
////////////////////////////////////////////////////////////////////////////////////////
// Field Manipulation
////////////////////////////////////////////////////////////////////////////////////////
public:
// Sets the complete tag field without sub fields manipulation
void setVlanTag (uint16_t data);
uint16_t getVlanTag ();
void setTagUserPriorty (uint8_t data);
uint8_t getTagUserPriorty ();
bool getTagCFI ();
void setTagCFI (bool);
uint16_t getTagID ();
void setTagID (uint16_t);
void incrementTagID(uint16_t inc_value);
void setFromPkt (uint8_t* data);
uint8_t reconstructPkt (uint8_t* destBuff);
////////////////////////////////////////////////////////////////////////////////////////
// Common Interface
////////////////////////////////////////////////////////////////////////////////////////
public:
uint8_t* getPointer (){return (uint8_t*)this;}
uint32_t getSize (){return (uint32_t)sizeof(VLANHeader);}
uint16_t getNextProtocolNetOrder ();
uint16_t getNextProtocolHostOrder ();
void setNextProtocolFromNetOrder(uint16_t);
void setNextProtocolFromHostOrder(uint16_t);
void dump (FILE* fd);
static uint16_t bytesToSkip(uint8_t* base)
{
return sizeof(VLANHeader);
}
static uint8_t reconstructFromBuffer(uint8_t* destBuffer, uint8_t* srcBuffer);
static uint8_t fillReconstructionBuffer(uint8_t* destBuffer, uint8_t* srcBuffer);
static uint8_t fillReconstructionBuffer(uint8_t* destBuffer, VLANHeader& vHeader);
static uint32_t getMaxVlanTag() { return (1<<12) - 1 ; }
public:
uint16_t myTag;
uint16_t myNextProtocol;
};
#include "VLANHeader.inl"
#endif //_VLAN_HEADER_H_
|
