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ppp-header.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2008 University of Washington
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  */
18 
19 #include <iostream>
20 #include "ns3/abort.h"
21 #include "ns3/assert.h"
22 #include "ns3/log.h"
23 #include "ns3/header.h"
24 #include "ppp-header.h"
25 
26 NS_LOG_COMPONENT_DEFINE ("PppHeader");
27 
28 namespace ns3 {
29 
30 NS_OBJECT_ENSURE_REGISTERED (PppHeader);
31 
32 PppHeader::PppHeader ()
33 {
34 }
35 
36 PppHeader::~PppHeader ()
37 {
38 }
39 
40 TypeId
41 PppHeader::GetTypeId (void)
42 {
43  static TypeId tid = TypeId ("ns3::PppHeader")
44  .SetParent<Header> ()
45  .AddConstructor<PppHeader> ()
46  ;
47  return tid;
48 }
49 
50 TypeId
51 PppHeader::GetInstanceTypeId (void) const
52 {
53  return GetTypeId ();
54 }
55 
56 void
57 PppHeader::Print (std::ostream &os) const
58 {
59  std::string proto;
60 
61  switch(m_protocol)
62  {
63  case 0x0021: /* IPv4 */
64  proto = "IP (0x0021)";
65  break;
66  case 0x0057: /* IPv6 */
67  proto = "IPv6 (0x0057)";
68  break;
69  default:
70  NS_ASSERT_MSG (false, "PPP Protocol number not defined!");
71  }
72  os << "Point-to-Point Protocol: " << proto;
73 }
74 
75 uint32_t
76 PppHeader::GetSerializedSize (void) const
77 {
78  return 2;
79 }
80 
81 void
82 PppHeader::Serialize (Buffer::Iterator start) const
83 {
84  start.WriteHtonU16 (m_protocol);
85 }
86 
87 uint32_t
88 PppHeader::Deserialize (Buffer::Iterator start)
89 {
90  m_protocol = start.ReadNtohU16 ();
91  return GetSerializedSize ();
92 }
93 
94 void
95 PppHeader::SetProtocol (uint16_t protocol)
96 {
97  m_protocol=protocol;
98 }
99 
100 uint16_t
101 PppHeader::GetProtocol (void)
102 {
103  return m_protocol;
104 }
105 
106 
107 } // namespace ns3