A Discrete-Event Network Simulator
API
tcp-option-sack-permitted.cc
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1/*
2 * Copyright (c) 2011 Adrian Sai-wah Tam
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation;
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 *
17 * Original Author: Adrian Sai-wah Tam <adrian.sw.tam@gmail.com>
18 * Documentation, test cases: Truc Anh N. Nguyen <annguyen@ittc.ku.edu>
19 * ResiliNets Research Group https://resilinets.org/
20 * The University of Kansas
21 * James P.G. Sterbenz <jpgs@ittc.ku.edu>, director
22 */
23
25
26#include "ns3/log.h"
27#include "ns3/tcp-header.h"
28
29namespace ns3
30{
31
32NS_LOG_COMPONENT_DEFINE("TcpOptionSackPermitted");
33
34NS_OBJECT_ENSURE_REGISTERED(TcpOptionSackPermitted);
35
37 : TcpOption()
38{
39}
40
42{
43}
44
47{
48 static TypeId tid = TypeId("ns3::TcpOptionSackPermitted")
50 .SetGroupName("Internet")
51 .AddConstructor<TcpOptionSackPermitted>();
52 return tid;
53}
54
57{
58 return GetTypeId();
59}
60
61void
62TcpOptionSackPermitted::Print(std::ostream& os) const
63{
64 os << "[sack_perm]";
65}
66
69{
70 return 2;
71}
72
73void
75{
77 i.WriteU8(GetKind()); // Kind
78 i.WriteU8(2); // Length
79}
80
83{
85
86 uint8_t readKind = i.ReadU8();
87 if (readKind != GetKind())
88 {
89 NS_LOG_WARN("Malformed Sack-Permitted option");
90 return 0;
91 }
92
93 uint8_t size = i.ReadU8();
94 if (size != 2)
95 {
96 NS_LOG_WARN("Malformed Sack-Permitted option");
97 return 0;
98 }
99 return GetSerializedSize();
100}
101
102uint8_t
104{
106}
107
108} // namespace ns3
iterator in a Buffer instance
Definition: buffer.h:100
uint8_t ReadU8()
Definition: buffer.h:1027
void WriteU8(uint8_t data)
Definition: buffer.h:881
Base class for all kinds of TCP options.
Definition: tcp-option.h:38
@ SACKPERMITTED
SACKPERMITTED.
Definition: tcp-option.h:62
Defines the TCP option of kind 4 (selective acknowledgment permitted option) as in RFC 2018
void Serialize(Buffer::Iterator start) const override
Serialize the Option to a buffer iterator.
uint32_t Deserialize(Buffer::Iterator start) override
Deserialize the Option from a buffer iterator.
static TypeId GetTypeId()
Get the type ID.
void Print(std::ostream &os) const override
Print the Option contents.
uint32_t GetSerializedSize() const override
Returns number of bytes required for Option serialization.
uint8_t GetKind() const override
Get the ‘kind’ (as in RFC 793) of this option.
TypeId GetInstanceTypeId() const override
Get the most derived TypeId for this Object.
a unique identifier for an interface.
Definition: type-id.h:59
TypeId SetParent(TypeId tid)
Set the parent TypeId.
Definition: type-id.cc:935
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:202
#define NS_LOG_WARN(msg)
Use NS_LOG to output a message of level LOG_WARN.
Definition: log.h:261
#define NS_OBJECT_ENSURE_REGISTERED(type)
Register an Object subclass with the TypeId system.
Definition: object-base.h:46
Every class exported by the ns3 library is enclosed in the ns3 namespace.