/src/PcapPlusPlus/Packet++/header/MplsLayer.h
Line | Count | Source (jump to first uncovered line) |
1 | | #ifndef PACKETPP_MPLS_LAYER |
2 | | #define PACKETPP_MPLS_LAYER |
3 | | |
4 | | #include "Layer.h" |
5 | | |
6 | | /// @file |
7 | | |
8 | | /** |
9 | | * \namespace pcpp |
10 | | * \brief The main namespace for the PcapPlusPlus lib |
11 | | */ |
12 | | namespace pcpp |
13 | | { |
14 | | |
15 | | /** |
16 | | * @class MplsLayer |
17 | | * Represents a MPLS (Multi-Protocol Label Switching) layer |
18 | | */ |
19 | | class MplsLayer : public Layer |
20 | | { |
21 | | private: |
22 | | |
23 | | #pragma pack(push, 1) |
24 | | struct mpls_header |
25 | | { |
26 | | uint16_t hiLabel; |
27 | | uint8_t misc; |
28 | | uint8_t ttl; |
29 | | }; |
30 | | #pragma pack(pop) |
31 | | |
32 | 5.42k | mpls_header* getMplsHeader() const { return (mpls_header*)m_Data; } |
33 | | |
34 | | public: |
35 | | /** A constructor that creates the layer from an existing packet raw data |
36 | | * @param[in] data A pointer to the raw data |
37 | | * @param[in] dataLen Size of the data in bytes |
38 | | * @param[in] prevLayer A pointer to the previous layer |
39 | | * @param[in] packet A pointer to the Packet instance where layer will be stored in |
40 | | */ |
41 | 5.57k | MplsLayer(uint8_t* data, size_t dataLen, Layer* prevLayer, Packet* packet) : Layer(data, dataLen, prevLayer, packet) { m_Protocol = MPLS; } |
42 | | |
43 | | /** |
44 | | * A constructor that allocates a new MPLS header |
45 | | * @param[in] mplsLabel MPLS label |
46 | | * @param[in] ttl Time-to-leave value |
47 | | * @param[in] experimentalUseValue Experimental use value |
48 | | * @param[in] bottomOfStack Bottom-of-stack value which indicate whether the next layer will also be a MPLS label or not |
49 | | */ |
50 | | MplsLayer(uint32_t mplsLabel, uint8_t ttl, uint8_t experimentalUseValue, bool bottomOfStack); |
51 | | |
52 | 0 | virtual ~MplsLayer() {} |
53 | | |
54 | | /** |
55 | | * @return TTL value of the MPLS header |
56 | | */ |
57 | 0 | uint8_t getTTL() const { return getMplsHeader()->ttl; } |
58 | | |
59 | | /** |
60 | | * Set the TTL value |
61 | | * @param[in] ttl The TTL value to set |
62 | | */ |
63 | 0 | void setTTL(uint8_t ttl) { getMplsHeader()->ttl = ttl; } |
64 | | |
65 | | /** |
66 | | * Get an indication whether the next layer is also be a MPLS label or not |
67 | | * @return True if it's the last MPLS layer, false otherwise |
68 | | */ |
69 | | bool isBottomOfStack() const; |
70 | | |
71 | | /** |
72 | | * Set the bottom-of-stack bit in the MPLS label |
73 | | * @param[in] val Set or unset the bit |
74 | | */ |
75 | | void setBottomOfStack(bool val); |
76 | | |
77 | | /** |
78 | | * @return The exp value (3 bits) of the MPLS label |
79 | | */ |
80 | | uint8_t getExperimentalUseValue() const; |
81 | | |
82 | | /** |
83 | | * Set the exp value (3 bits) of the MPLS label |
84 | | * @param[in] val The exp value to set. val must be a valid number meaning between 0 and 7 (inclusive) |
85 | | * @return True if exp value was set successfully or false if val has invalid value |
86 | | */ |
87 | | bool setExperimentalUseValue(uint8_t val); |
88 | | |
89 | | /** |
90 | | * @return The MPLS label value (20 bits) |
91 | | */ |
92 | | uint32_t getMplsLabel() const; |
93 | | |
94 | | /** |
95 | | * Set the MPLS label (20 bits) |
96 | | * @param[in] label The label to set. label must be a valid number meaning between 0 and 0xFFFFF (inclusive) |
97 | | * @return True if label was set successfully or false if label has invalid value |
98 | | */ |
99 | | bool setMplsLabel(uint32_t label); |
100 | | |
101 | | // implement abstract methods |
102 | | |
103 | | /** |
104 | | * Currently identifies the following next layers: IPv4Layer, IPv6Layer, MplsLayer. Otherwise sets PayloadLayer |
105 | | */ |
106 | | void parseNextLayer(); |
107 | | |
108 | | /** |
109 | | * @return Size of MPLS header (4 bytes) |
110 | | */ |
111 | 5.57k | size_t getHeaderLen() const { return sizeof(mpls_header); } |
112 | | |
113 | | /** |
114 | | * Set/unset the bottom-of-stack bit according to next layer: if it's a MPLS layer then bottom-of-stack will be unset. If it's not a |
115 | | * MPLS layer this bit will be set |
116 | | */ |
117 | | void computeCalculateFields(); |
118 | | |
119 | | std::string toString() const; |
120 | | |
121 | 5.57k | OsiModelLayer getOsiModelLayer() const { return OsiModelNetworkLayer; } |
122 | | }; |
123 | | |
124 | | } // namespace pcpp |
125 | | |
126 | | #endif /* PACKETPP_MPLS_LAYER */ |