A Discrete-Event Network Simulator
API
ipv4-queue-disc-item.h
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3  * Copyright (c) 2016 Universita' degli Studi di Napoli Federico II
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18 
19 #ifndef IPV4_QUEUE_DISC_ITEM_H
20 #define IPV4_QUEUE_DISC_ITEM_H
21 
22 #include "ns3/packet.h"
23 #include "ns3/queue-item.h"
24 #include "ipv4-header.h"
25 
26 namespace ns3 {
27 
37 public:
45  Ipv4QueueDiscItem (Ptr<Packet> p, const Address & addr, uint16_t protocol, const Ipv4Header & header);
46 
47  virtual ~Ipv4QueueDiscItem ();
48 
52  virtual uint32_t GetSize (void) const;
53 
57  const Ipv4Header & GetHeader (void) const;
58 
62  virtual void AddHeader (void);
63 
68  virtual void Print (std::ostream &os) const;
69 
70  /*
71  * The values for the fields of the Ipv4 header are taken from m_header and
72  * thus might differ from those present in the packet in case the header is
73  * modified after being added to the packet. However, this function is likely
74  * to be called before the header is added to the packet (i.e., before the
75  * packet is dequeued from the queue disc)
76  */
77  virtual bool GetUint8Value (Uint8Values field, uint8_t &value) const;
78 
83  virtual bool Mark (void);
84 
95  virtual uint32_t Hash (uint32_t perturbation) const;
96 
97 private:
117 
120 };
121 
122 } // namespace ns3
123 
124 #endif /* IPV4_QUEUE_DISC_ITEM_H */
Ipv4QueueDiscItem & operator=(const Ipv4QueueDiscItem &)
Assignment operator.
virtual void Print(std::ostream &os) const
Print the item contents.
Ipv4Header m_header
The IPv4 header.
QueueDiscItem is the abstract base class for items that are stored in a queue disc.
Definition: queue-item.h:148
Ipv4QueueDiscItem()
Default constructor.
a polymophic address class
Definition: address.h:90
Uint8Values
1-byte fields of the packet whose value can be retrieved, if present
Definition: queue-item.h:76
Packet header for IPv4.
Definition: ipv4-header.h:33
const Ipv4Header & GetHeader(void) const
Every class exported by the ns3 library is enclosed in the ns3 namespace.
Ipv4QueueDiscItem is a subclass of QueueDiscItem which stores IPv4 packets.
virtual uint32_t Hash(uint32_t perturbation) const
Computes the hash of the packet&#39;s 5-tuple.
virtual bool Mark(void)
Marks the packet by setting ECN_CE bits if the packet has ECN_ECT0 or ECN_ECT1 bits set...
virtual bool GetUint8Value(Uint8Values field, uint8_t &value) const
Retrieve the value of a given field from the packet, if present.
virtual void AddHeader(void)
Add the header to the packet.
bool m_headerAdded
True if the header has already been added to the packet.
virtual uint32_t GetSize(void) const