author | Sebastien Vincent <vincent@clarinet.u-strasbg.fr> |
Tue, 01 Jul 2008 10:52:11 -0700 | |
changeset 3363 | 33d1ca2e4ba4 |
parent 3235 | c2f34dac1b9e |
permissions | -rw-r--r-- |
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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2005 INRIA |
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* |
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* 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
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*/ |
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|
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#ifndef IPV4_HEADER_H |
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#define IPV4_HEADER_H |
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|
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#include "ns3/header.h" |
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#include "ns3/ipv4-address.h" |
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|
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namespace ns3 { |
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/** |
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* \brief Packet header for IPv4 |
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*/ |
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class Ipv4Header : public Header |
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{ |
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public: |
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/** |
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* \brief Construct a null IPv4 header |
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*/ |
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Ipv4Header (); |
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/** |
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* \brief Enable checksum calculation for this header. |
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*/ |
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void EnableChecksum (void); |
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* \param size the size of the payload in bytes |
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*/ |
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void SetPayloadSize (uint16_t size); |
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* \param identification the Identification field of IPv4 packets. |
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* |
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* By default, set to zero. |
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*/ |
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void SetIdentification (uint16_t identification); |
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* \param tos the 8 bits of Ipv4 TOS. |
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*/ |
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void SetTos (uint8_t tos); |
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* This packet is not the last packet of a fragmented ipv4 packet. |
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*/ |
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void SetMoreFragments (void); |
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* This packet is the last packet of a fragmented ipv4 packet. |
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*/ |
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void SetLastFragment (void); |
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* Don't fragment this packet: if you need to anyway, drop it. |
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*/ |
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void SetDontFragment (void); |
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* If you need to fragment this packet, you can do it. |
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*/ |
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void SetMayFragment (void); |
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* \param offset the ipv4 fragment offset |
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*/ |
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void SetFragmentOffset (uint16_t offset); |
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* \param ttl the ipv4 TTL |
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*/ |
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void SetTtl (uint8_t ttl); |
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* \param num the ipv4 protocol field |
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*/ |
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void SetProtocol (uint8_t num); |
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* \param source the source of this packet |
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*/ |
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void SetSource (Ipv4Address source); |
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* \param destination the destination of this packet. |
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*/ |
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void SetDestination (Ipv4Address destination); |
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* \returns the size of the payload in bytes |
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*/ |
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uint16_t GetPayloadSize (void) const; |
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/** |
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* \returns the identification field of this packet. |
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*/ |
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uint16_t GetIdentification (void) const; |
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/** |
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101 |
* \returns the TOS field of this packet. |
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102 |
*/ |
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103 |
uint8_t GetTos (void) const; |
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104 |
/** |
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105 |
* \returns true if this is the last fragment of a packet, false otherwise. |
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106 |
*/ |
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107 |
bool IsLastFragment (void) const; |
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108 |
/** |
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109 |
* \returns true if this is this packet can be fragmented. |
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110 |
*/ |
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111 |
bool IsDontFragment (void) const; |
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112 |
/** |
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113 |
* \returns the offset of this fragment. |
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114 |
*/ |
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115 |
uint16_t GetFragmentOffset (void) const; |
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116 |
/** |
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117 |
* \returns the TTL field of this packet |
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118 |
*/ |
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119 |
uint8_t GetTtl (void) const; |
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120 |
/** |
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121 |
* \returns the protocol field of this packet |
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122 |
*/ |
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123 |
uint8_t GetProtocol (void) const; |
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124 |
/** |
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125 |
* \returns the source address of this packet |
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126 |
*/ |
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127 |
Ipv4Address GetSource (void) const; |
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128 |
/** |
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129 |
* \returns the destination address of this packet |
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130 |
*/ |
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131 |
Ipv4Address GetDestination (void) const; |
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132 |
|
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133 |
/** |
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134 |
* \returns true if the ipv4 checksum is correct, false otherwise. |
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135 |
* |
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136 |
* If Ipv4Header::EnableChecksums has not been called prior to |
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137 |
* deserializing this header, this method will always return true. |
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138 |
*/ |
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|
139 |
bool IsChecksumOk (void) const; |
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140 |
|
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141 |
static TypeId GetTypeId (void); |
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142 |
virtual TypeId GetInstanceTypeId (void) const; |
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143 |
virtual void Print (std::ostream &os) const; |
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144 |
virtual uint32_t GetSerializedSize (void) const; |
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145 |
virtual void Serialize (Buffer::Iterator start) const; |
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146 |
virtual uint32_t Deserialize (Buffer::Iterator start); |
235
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147 |
private: |
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148 |
|
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149 |
enum FlagsE { |
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150 |
DONT_FRAGMENT = (1<<0), |
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151 |
MORE_FRAGMENTS = (1<<1) |
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152 |
}; |
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153 |
|
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154 |
bool m_calcChecksum; |
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155 |
|
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|
156 |
uint16_t m_payloadSize; |
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|
157 |
uint16_t m_identification; |
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|
158 |
uint32_t m_tos : 8; |
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|
159 |
uint32_t m_ttl : 8; |
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|
160 |
uint32_t m_protocol : 8; |
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|
161 |
uint32_t m_flags : 3; |
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|
162 |
uint16_t m_fragmentOffset : 13; |
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|
163 |
Ipv4Address m_source; |
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|
164 |
Ipv4Address m_destination; |
3363
33d1ca2e4ba4
bug 236: add optional support for tcp and udp checksum.
Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
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|
165 |
uint16_t m_checksum; |
235
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|
166 |
bool m_goodChecksum; |
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|
167 |
}; |
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|
168 |
|
1232
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|
169 |
} // namespace ns3 |
235
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|
170 |
|
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|
171 |
|
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|
172 |
#endif /* IPV4_HEADER_H */ |