author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Sat, 04 Jul 2009 08:15:48 +0200 | |
changeset 4654 | 2eaebe77d66b |
parent 3404 | b5d4a04c7b68 |
permissions | -rw-r--r-- |
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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */ |
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2 |
/* |
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* Copyright (c) 2007 Georgia Tech Research Corporation |
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* |
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5 |
* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation; |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* Author: Raj Bhattacharjea <raj.b@gatech.edu> |
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*/ |
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#include <stdint.h> |
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#include <iostream> |
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#include "tcp-socket-impl.h" |
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#include "tcp-header.h" |
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#include "ns3/buffer.h" |
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bug 247: tcp checksum crashes when enabled.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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#include "ns3/address-utils.h" |
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namespace ns3 { |
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|
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NS_OBJECT_ENSURE_REGISTERED (TcpHeader); |
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TcpHeader::TcpHeader () |
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: m_sourcePort (0), |
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m_destinationPort (0), |
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m_sequenceNumber (0), |
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m_ackNumber (0), |
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m_length (5), |
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m_flags (0), |
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revert to previous behavior: windowSize is initialized by default to 0xffff
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m_windowSize (0xffff), |
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bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
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m_urgentPointer (0), |
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Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
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m_calcChecksum(false), |
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Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
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m_goodChecksum(true) |
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{} |
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TcpHeader::~TcpHeader () |
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{} |
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void |
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TcpHeader::EnableChecksums (void) |
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{ |
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m_calcChecksum = true; |
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} |
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|
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void TcpHeader::SetSourcePort (uint16_t port) |
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{ |
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m_sourcePort = port; |
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} |
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void TcpHeader::SetDestinationPort (uint16_t port) |
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{ |
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m_destinationPort = port; |
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61 |
} |
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void TcpHeader::SetSequenceNumber (SequenceNumber sequenceNumber) |
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{ |
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m_sequenceNumber = sequenceNumber; |
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65 |
} |
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void TcpHeader::SetAckNumber (SequenceNumber ackNumber) |
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{ |
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m_ackNumber = ackNumber; |
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} |
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void TcpHeader::SetLength (uint8_t length) |
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{ |
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m_length = length; |
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} |
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void TcpHeader::SetFlags (uint8_t flags) |
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{ |
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m_flags = flags; |
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77 |
} |
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void TcpHeader::SetWindowSize (uint16_t windowSize) |
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{ |
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80 |
m_windowSize = windowSize; |
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81 |
} |
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void TcpHeader::SetUrgentPointer (uint16_t urgentPointer) |
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83 |
{ |
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m_urgentPointer = urgentPointer; |
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85 |
} |
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|
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87 |
uint16_t TcpHeader::GetSourcePort () const |
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88 |
{ |
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89 |
return m_sourcePort; |
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90 |
} |
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uint16_t TcpHeader::GetDestinationPort () const |
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92 |
{ |
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93 |
return m_destinationPort; |
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94 |
} |
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95 |
SequenceNumber TcpHeader::GetSequenceNumber () const |
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96 |
{ |
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97 |
return m_sequenceNumber; |
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98 |
} |
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99 |
SequenceNumber TcpHeader::GetAckNumber () const |
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100 |
{ |
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101 |
return m_ackNumber; |
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102 |
} |
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103 |
uint8_t TcpHeader::GetLength () const |
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104 |
{ |
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105 |
return m_length; |
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106 |
} |
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107 |
uint8_t TcpHeader::GetFlags () const |
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108 |
{ |
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109 |
return m_flags; |
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110 |
} |
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diff
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|
111 |
uint16_t TcpHeader::GetWindowSize () const |
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Added in ns-3-tcp (second try)
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parents:
diff
changeset
|
112 |
{ |
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Added in ns-3-tcp (second try)
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diff
changeset
|
113 |
return m_windowSize; |
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Added in ns-3-tcp (second try)
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parents:
diff
changeset
|
114 |
} |
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Added in ns-3-tcp (second try)
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parents:
diff
changeset
|
115 |
uint16_t TcpHeader::GetUrgentPointer () const |
6f97d21a99c2
Added in ns-3-tcp (second try)
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parents:
diff
changeset
|
116 |
{ |
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Added in ns-3-tcp (second try)
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diff
changeset
|
117 |
return m_urgentPointer; |
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Added in ns-3-tcp (second try)
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parents:
diff
changeset
|
118 |
} |
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Added in ns-3-tcp (second try)
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diff
changeset
|
119 |
|
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diff
changeset
|
120 |
void |
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Added in ns-3-tcp (second try)
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changeset
|
121 |
TcpHeader::InitializeChecksum (Ipv4Address source, |
3404
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bug 247: tcp checksum crashes when enabled.
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|
122 |
Ipv4Address destination, |
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|
123 |
uint8_t protocol) |
2224
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|
124 |
{ |
3404
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|
125 |
m_source = source; |
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bug 247: tcp checksum crashes when enabled.
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|
126 |
m_destination = destination; |
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bug 247: tcp checksum crashes when enabled.
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changeset
|
127 |
m_protocol = protocol; |
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bug 247: tcp checksum crashes when enabled.
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changeset
|
128 |
} |
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bug 236: add optional support for tcp and udp checksum.
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|
129 |
|
3404
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changeset
|
130 |
uint16_t |
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bug 247: tcp checksum crashes when enabled.
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changeset
|
131 |
TcpHeader::CalculateHeaderChecksum (uint16_t size) const |
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|
132 |
{ |
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|
133 |
Buffer buf = Buffer (12); |
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
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changeset
|
134 |
buf.AddAtStart (12); |
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
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diff
changeset
|
135 |
Buffer::Iterator it = buf.Begin (); |
3363
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bug 236: add optional support for tcp and udp checksum.
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|
136 |
|
3404
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bug 247: tcp checksum crashes when enabled.
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changeset
|
137 |
WriteTo (it, m_source); |
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
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changeset
|
138 |
WriteTo (it, m_destination); |
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
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parents:
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diff
changeset
|
139 |
it.WriteU8 (0); /* protocol */ |
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
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diff
changeset
|
140 |
it.WriteU8 (m_protocol); /* protocol */ |
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
3363
diff
changeset
|
141 |
it.WriteU8 (size >> 8); /* length */ |
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
3363
diff
changeset
|
142 |
it.WriteU8 (size & 0xff); /* length */ |
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
3363
diff
changeset
|
143 |
|
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
3363
diff
changeset
|
144 |
it = buf.Begin (); |
3363
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
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parents:
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diff
changeset
|
145 |
/* we don't CompleteChecksum ( ~ ) now */ |
3404
b5d4a04c7b68
bug 247: tcp checksum crashes when enabled.
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parents:
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diff
changeset
|
146 |
return ~(it.CalculateIpChecksum (12)); |
3363
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
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changeset
|
147 |
} |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
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changeset
|
148 |
|
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
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changeset
|
149 |
bool |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
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diff
changeset
|
150 |
TcpHeader::IsChecksumOk (void) const |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
151 |
{ |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
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changeset
|
152 |
return m_goodChecksum; |
2224
6f97d21a99c2
Added in ns-3-tcp (second try)
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parents:
diff
changeset
|
153 |
} |
6f97d21a99c2
Added in ns-3-tcp (second try)
Raj Bhattacharjea <raj.b@gatech.edu>
parents:
diff
changeset
|
154 |
|
2646
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remove dead code.
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diff
changeset
|
155 |
TypeId |
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diff
changeset
|
156 |
TcpHeader::GetTypeId (void) |
2224
6f97d21a99c2
Added in ns-3-tcp (second try)
Raj Bhattacharjea <raj.b@gatech.edu>
parents:
diff
changeset
|
157 |
{ |
2646
c1fef7686472
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diff
changeset
|
158 |
static TypeId tid = TypeId ("ns3::TcpHeader") |
c1fef7686472
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Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
2643
diff
changeset
|
159 |
.SetParent<Header> () |
2650
3de4cacb8981
make sure all headers and trailers gets a constructor registered in their TypeId.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
2646
diff
changeset
|
160 |
.AddConstructor<TcpHeader> () |
2646
c1fef7686472
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diff
changeset
|
161 |
; |
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parents:
2643
diff
changeset
|
162 |
return tid; |
2224
6f97d21a99c2
Added in ns-3-tcp (second try)
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diff
changeset
|
163 |
} |
2646
c1fef7686472
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Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
2643
diff
changeset
|
164 |
TypeId |
c1fef7686472
remove dead code.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
2643
diff
changeset
|
165 |
TcpHeader::GetInstanceTypeId (void) const |
c1fef7686472
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Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
2643
diff
changeset
|
166 |
{ |
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remove dead code.
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parents:
2643
diff
changeset
|
167 |
return GetTypeId (); |
c1fef7686472
remove dead code.
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parents:
2643
diff
changeset
|
168 |
} |
2224
6f97d21a99c2
Added in ns-3-tcp (second try)
Raj Bhattacharjea <raj.b@gatech.edu>
parents:
diff
changeset
|
169 |
void TcpHeader::Print (std::ostream &os) const |
6f97d21a99c2
Added in ns-3-tcp (second try)
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parents:
diff
changeset
|
170 |
{ |
2769
05982d1a9286
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changeset
|
171 |
os << m_sourcePort << " > " << m_destinationPort; |
05982d1a9286
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changeset
|
172 |
if(m_flags!=0) |
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changeset
|
173 |
{ |
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Implement TcpHeader::Print (bug 151)
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changeset
|
174 |
os<<" ["; |
05982d1a9286
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changeset
|
175 |
if((m_flags & FIN) != 0) |
05982d1a9286
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diff
changeset
|
176 |
{ |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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diff
changeset
|
177 |
os<<" FIN "; |
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changeset
|
178 |
} |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
179 |
if((m_flags & SYN) != 0) |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
180 |
{ |
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changeset
|
181 |
os<<" SYN "; |
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changeset
|
182 |
} |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
183 |
if((m_flags & RST) != 0) |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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diff
changeset
|
184 |
{ |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
185 |
os<<" RST "; |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
186 |
} |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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diff
changeset
|
187 |
if((m_flags & PSH) != 0) |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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parents:
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diff
changeset
|
188 |
{ |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
189 |
os<<" PSH "; |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
190 |
} |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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diff
changeset
|
191 |
if((m_flags & ACK) != 0) |
05982d1a9286
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diff
changeset
|
192 |
{ |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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diff
changeset
|
193 |
os<<" ACK "; |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
194 |
} |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
195 |
if((m_flags & URG) != 0) |
05982d1a9286
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changeset
|
196 |
{ |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
197 |
os<<" URG "; |
05982d1a9286
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changeset
|
198 |
} |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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diff
changeset
|
199 |
os<<"]"; |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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changeset
|
200 |
} |
05982d1a9286
Implement TcpHeader::Print (bug 151)
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diff
changeset
|
201 |
os<<" Seq="<<m_sequenceNumber<<" Ack="<<m_ackNumber<<" Win="<<m_windowSize; |
2224
6f97d21a99c2
Added in ns-3-tcp (second try)
Raj Bhattacharjea <raj.b@gatech.edu>
parents:
diff
changeset
|
202 |
} |
6f97d21a99c2
Added in ns-3-tcp (second try)
Raj Bhattacharjea <raj.b@gatech.edu>
parents:
diff
changeset
|
203 |
uint32_t TcpHeader::GetSerializedSize (void) const |
6f97d21a99c2
Added in ns-3-tcp (second try)
Raj Bhattacharjea <raj.b@gatech.edu>
parents:
diff
changeset
|
204 |
{ |
2769
05982d1a9286
Implement TcpHeader::Print (bug 151)
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parents:
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diff
changeset
|
205 |
return 4*m_length; |
2224
6f97d21a99c2
Added in ns-3-tcp (second try)
Raj Bhattacharjea <raj.b@gatech.edu>
parents:
diff
changeset
|
206 |
} |
6f97d21a99c2
Added in ns-3-tcp (second try)
Raj Bhattacharjea <raj.b@gatech.edu>
parents:
diff
changeset
|
207 |
void TcpHeader::Serialize (Buffer::Iterator start) const |
6f97d21a99c2
Added in ns-3-tcp (second try)
Raj Bhattacharjea <raj.b@gatech.edu>
parents:
diff
changeset
|
208 |
{ |
3363
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
209 |
Buffer::Iterator i = start; |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
210 |
i.WriteHtonU16 (m_sourcePort); |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
211 |
i.WriteHtonU16 (m_destinationPort); |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
212 |
i.WriteHtonU32 (m_sequenceNumber); |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
213 |
i.WriteHtonU32 (m_ackNumber); |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
214 |
i.WriteHtonU16 (m_length << 12 | m_flags); //reserved bits are all zero |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
215 |
i.WriteHtonU16 (m_windowSize); |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
216 |
i.WriteHtonU16 (0); |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
217 |
i.WriteHtonU16 (m_urgentPointer); |
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
parents:
3260
diff
changeset
|
218 |
|
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if(m_calcChecksum) |
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{ |
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uint16_t headerChecksum = CalculateHeaderChecksum (start.GetSize ()); |
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i = start; |
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uint16_t checksum = i.CalculateIpChecksum(start.GetSize (), headerChecksum); |
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224 |
|
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i = start; |
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i.Next(16); |
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i.WriteU16(checksum); |
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} |
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} |
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uint32_t TcpHeader::Deserialize (Buffer::Iterator start) |
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231 |
{ |
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Buffer::Iterator i = start; |
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m_sourcePort = i.ReadNtohU16 (); |
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m_destinationPort = i.ReadNtohU16 (); |
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m_sequenceNumber = i.ReadNtohU32 (); |
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236 |
m_ackNumber = i.ReadNtohU32 (); |
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uint16_t field = i.ReadNtohU16 (); |
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m_flags = field & 0x3F; |
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m_length = field>>12; |
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m_windowSize = i.ReadNtohU16 (); |
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241 |
i.Next (2); |
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m_urgentPointer = i.ReadNtohU16 (); |
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243 |
|
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if(m_calcChecksum) |
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245 |
{ |
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uint16_t headerChecksum = CalculateHeaderChecksum (start.GetSize ()); |
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247 |
i = start; |
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248 |
uint16_t checksum = i.CalculateIpChecksum(start.GetSize (), headerChecksum); |
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m_goodChecksum = (checksum == 0); |
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250 |
} |
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251 |
|
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return GetSerializedSize (); |
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253 |
} |
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254 |
|
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255 |
|
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256 |
}; // namespace ns3 |