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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ | 1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
2 /* | 2 /* |
3 * Copyright (c) 2007 Georgia Tech Research Corporation | 3 * Copyright (c) 2007 Georgia Tech Research Corporation |
4 * Copyright (c) 2010 Adrian Sai-wah Tam | 4 * Copyright (c) 2010 Adrian Sai-wah Tam |
5 * | 5 * |
6 * This program is free software; you can redistribute it and/or modify | 6 * This program is free software; you can redistribute it and/or modify |
7 * it under the terms of the GNU General Public License version 2 as | 7 * it under the terms of the GNU General Public License version 2 as |
8 * published by the Free Software Foundation; | 8 * published by the Free Software Foundation; |
9 * | 9 * |
10 * This program is distributed in the hope that it will be useful, | 10 * This program is distributed in the hope that it will be useful, |
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23 if (m_node) { std::clog << Simulator::Now ().GetSeconds () << " [node " << m_n
ode->GetId () << "] "; } | 23 if (m_node) { std::clog << Simulator::Now ().GetSeconds () << " [node " << m_n
ode->GetId () << "] "; } |
24 | 24 |
25 #include "ns3/abort.h" | 25 #include "ns3/abort.h" |
26 #include "ns3/node.h" | 26 #include "ns3/node.h" |
27 #include "ns3/inet-socket-address.h" | 27 #include "ns3/inet-socket-address.h" |
28 #include "ns3/inet6-socket-address.h" | 28 #include "ns3/inet6-socket-address.h" |
29 #include "ns3/log.h" | 29 #include "ns3/log.h" |
30 #include "ns3/ipv4.h" | 30 #include "ns3/ipv4.h" |
31 #include "ns3/ipv6.h" | 31 #include "ns3/ipv6.h" |
32 #include "ns3/ipv4-interface-address.h" | 32 #include "ns3/ipv4-interface-address.h" |
33 #include "ns3/ipv4-route.h" | |
34 #include "ns3/ipv6-route.h" | |
35 #include "ns3/ipv4-routing-protocol.h" | 33 #include "ns3/ipv4-routing-protocol.h" |
36 #include "ns3/ipv6-routing-protocol.h" | 34 #include "ns3/ipv6-routing-protocol.h" |
37 #include "ns3/simulation-singleton.h" | 35 #include "ns3/simulation-singleton.h" |
38 #include "ns3/simulator.h" | 36 #include "ns3/simulator.h" |
39 #include "ns3/packet.h" | 37 #include "ns3/packet.h" |
40 #include "ns3/uinteger.h" | 38 #include "ns3/uinteger.h" |
41 #include "ns3/double.h" | 39 #include "ns3/double.h" |
42 #include "ns3/pointer.h" | 40 #include "ns3/pointer.h" |
43 #include "ns3/trace-source-accessor.h" | 41 #include "ns3/trace-source-accessor.h" |
44 #include "tcp-socket-base.h" | 42 #include "tcp-socket-base.h" |
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175 m_shutdownRecv (false), | 173 m_shutdownRecv (false), |
176 m_connected (false), | 174 m_connected (false), |
177 m_segmentSize (0), | 175 m_segmentSize (0), |
178 // For attribute initialization consistency (quiet valgrind) | 176 // For attribute initialization consistency (quiet valgrind) |
179 m_rWnd (0), | 177 m_rWnd (0), |
180 m_highRxMark (0), | 178 m_highRxMark (0), |
181 m_highRxAckMark (0), | 179 m_highRxAckMark (0), |
182 m_sndScaleFactor (0), | 180 m_sndScaleFactor (0), |
183 m_rcvScaleFactor (0), | 181 m_rcvScaleFactor (0), |
184 m_timestampEnabled (true), | 182 m_timestampEnabled (true), |
185 m_timestampToEcho (0) | 183 m_timestampToEcho (0), |
| 184 m_routev4(0), |
| 185 m_routev6(0) |
186 | 186 |
187 { | 187 { |
188 NS_LOG_FUNCTION (this); | 188 NS_LOG_FUNCTION (this); |
189 m_rxBuffer = CreateObject<TcpRxBuffer> (); | 189 m_rxBuffer = CreateObject<TcpRxBuffer> (); |
190 m_txBuffer = CreateObject<TcpTxBuffer> (); | 190 m_txBuffer = CreateObject<TcpTxBuffer> (); |
191 } | 191 } |
192 | 192 |
193 TcpSocketBase::TcpSocketBase (const TcpSocketBase& sock) | 193 TcpSocketBase::TcpSocketBase (const TcpSocketBase& sock) |
194 : TcpSocket (sock), | 194 : TcpSocket (sock), |
195 //copy object::m_tid and socket::callbacks | 195 //copy object::m_tid and socket::callbacks |
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218 m_msl (sock.m_msl), | 218 m_msl (sock.m_msl), |
219 m_segmentSize (sock.m_segmentSize), | 219 m_segmentSize (sock.m_segmentSize), |
220 m_maxWinSize (sock.m_maxWinSize), | 220 m_maxWinSize (sock.m_maxWinSize), |
221 m_rWnd (sock.m_rWnd), | 221 m_rWnd (sock.m_rWnd), |
222 m_highRxMark (sock.m_highRxMark), | 222 m_highRxMark (sock.m_highRxMark), |
223 m_highRxAckMark (sock.m_highRxAckMark), | 223 m_highRxAckMark (sock.m_highRxAckMark), |
224 m_winScalingEnabled (sock.m_winScalingEnabled), | 224 m_winScalingEnabled (sock.m_winScalingEnabled), |
225 m_sndScaleFactor (sock.m_sndScaleFactor), | 225 m_sndScaleFactor (sock.m_sndScaleFactor), |
226 m_rcvScaleFactor (sock.m_rcvScaleFactor), | 226 m_rcvScaleFactor (sock.m_rcvScaleFactor), |
227 m_timestampEnabled (sock.m_timestampEnabled), | 227 m_timestampEnabled (sock.m_timestampEnabled), |
228 m_timestampToEcho (sock.m_timestampToEcho) | 228 m_timestampToEcho (sock.m_timestampToEcho), |
| 229 m_routev4(0), |
| 230 m_routev6(0) |
229 | 231 |
230 { | 232 { |
231 NS_LOG_FUNCTION (this); | 233 NS_LOG_FUNCTION (this); |
232 NS_LOG_LOGIC ("Invoked the copy constructor"); | 234 NS_LOG_LOGIC ("Invoked the copy constructor"); |
233 // Copy the rtt estimator if it is set | 235 // Copy the rtt estimator if it is set |
234 if (sock.m_rtt) | 236 if (sock.m_rtt) |
235 { | 237 { |
236 m_rtt = sock.m_rtt->Copy (); | 238 m_rtt = sock.m_rtt->Copy (); |
237 } | 239 } |
238 // Reset all callbacks to null | 240 // Reset all callbacks to null |
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1750 else | 1752 else |
1751 { // Exponential backoff of connection time out | 1753 { // Exponential backoff of connection time out |
1752 int backoffCount = 0x1 << (m_cnRetries - m_cnCount); | 1754 int backoffCount = 0x1 << (m_cnRetries - m_cnCount); |
1753 m_rto = m_cnTimeout * backoffCount; | 1755 m_rto = m_cnTimeout * backoffCount; |
1754 m_cnCount--; | 1756 m_cnCount--; |
1755 } | 1757 } |
1756 } | 1758 } |
1757 if (m_endPoint != 0) | 1759 if (m_endPoint != 0) |
1758 { | 1760 { |
1759 m_tcp->SendPacket (p, header, m_endPoint->GetLocalAddress (), | 1761 m_tcp->SendPacket (p, header, m_endPoint->GetLocalAddress (), |
1760 m_endPoint->GetPeerAddress (), m_boundnetdevice); | 1762 m_endPoint->GetPeerAddress (), m_boundnetdevice, m_rout
ev4); |
1761 } | 1763 } |
1762 else | 1764 else |
1763 { | 1765 { |
1764 m_tcp->SendPacket (p, header, m_endPoint6->GetLocalAddress (), | 1766 m_tcp->SendPacket (p, header, m_endPoint6->GetLocalAddress (), |
1765 m_endPoint6->GetPeerAddress (), m_boundnetdevice); | 1767 m_endPoint6->GetPeerAddress (), m_boundnetdevice, m_rou
tev6); |
1766 } | 1768 } |
1767 if (flags & TcpHeader::ACK) | 1769 if (flags & TcpHeader::ACK) |
1768 { // If sending an ACK, cancel the delay ACK as well | 1770 { // If sending an ACK, cancel the delay ACK as well |
1769 m_delAckEvent.Cancel (); | 1771 m_delAckEvent.Cancel (); |
1770 m_delAckCount = 0; | 1772 m_delAckCount = 0; |
1771 } | 1773 } |
1772 if (m_retxEvent.IsExpired () && (hasSyn || hasFin) && !isAck ) | 1774 if (m_retxEvent.IsExpired () && (hasSyn || hasFin) && !isAck ) |
1773 { // Retransmit SYN / SYN+ACK / FIN / FIN+ACK to guard against lost | 1775 { // Retransmit SYN / SYN+ACK / FIN / FIN+ACK to guard against lost |
1774 NS_LOG_LOGIC ("Schedule retransmission timeout at time " | 1776 NS_LOG_LOGIC ("Schedule retransmission timeout at time " |
1775 << Simulator::Now ().GetSeconds () << " to expire at time " | 1777 << Simulator::Now ().GetSeconds () << " to expire at time " |
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1841 route = ipv4->GetRoutingProtocol ()->RouteOutput (Ptr<Packet> (), header, oif,
errno_); | 1843 route = ipv4->GetRoutingProtocol ()->RouteOutput (Ptr<Packet> (), header, oif,
errno_); |
1842 if (route == 0) | 1844 if (route == 0) |
1843 { | 1845 { |
1844 NS_LOG_LOGIC ("Route to " << m_endPoint->GetPeerAddress () << " does not e
xist"); | 1846 NS_LOG_LOGIC ("Route to " << m_endPoint->GetPeerAddress () << " does not e
xist"); |
1845 NS_LOG_ERROR (errno_); | 1847 NS_LOG_ERROR (errno_); |
1846 m_errno = errno_; | 1848 m_errno = errno_; |
1847 return -1; | 1849 return -1; |
1848 } | 1850 } |
1849 NS_LOG_LOGIC ("Route exists"); | 1851 NS_LOG_LOGIC ("Route exists"); |
1850 m_endPoint->SetLocalAddress (route->GetSource ()); | 1852 m_endPoint->SetLocalAddress (route->GetSource ()); |
| 1853 m_routev4 = route; |
1851 return 0; | 1854 return 0; |
1852 } | 1855 } |
1853 | 1856 |
1854 int | 1857 int |
1855 TcpSocketBase::SetupEndpoint6 () | 1858 TcpSocketBase::SetupEndpoint6 () |
1856 { | 1859 { |
1857 NS_LOG_FUNCTION (this); | 1860 NS_LOG_FUNCTION (this); |
1858 Ptr<Ipv6L3Protocol> ipv6 = m_node->GetObject<Ipv6L3Protocol> (); | 1861 Ptr<Ipv6L3Protocol> ipv6 = m_node->GetObject<Ipv6L3Protocol> (); |
1859 NS_ASSERT (ipv6 != 0); | 1862 NS_ASSERT (ipv6 != 0); |
1860 if (ipv6->GetRoutingProtocol () == 0) | 1863 if (ipv6->GetRoutingProtocol () == 0) |
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1871 route = ipv6->GetRoutingProtocol ()->RouteOutput (Ptr<Packet> (), header, oif,
errno_); | 1874 route = ipv6->GetRoutingProtocol ()->RouteOutput (Ptr<Packet> (), header, oif,
errno_); |
1872 if (route == 0) | 1875 if (route == 0) |
1873 { | 1876 { |
1874 NS_LOG_LOGIC ("Route to " << m_endPoint6->GetPeerAddress () << " does not
exist"); | 1877 NS_LOG_LOGIC ("Route to " << m_endPoint6->GetPeerAddress () << " does not
exist"); |
1875 NS_LOG_ERROR (errno_); | 1878 NS_LOG_ERROR (errno_); |
1876 m_errno = errno_; | 1879 m_errno = errno_; |
1877 return -1; | 1880 return -1; |
1878 } | 1881 } |
1879 NS_LOG_LOGIC ("Route exists"); | 1882 NS_LOG_LOGIC ("Route exists"); |
1880 m_endPoint6->SetLocalAddress (route->GetSource ()); | 1883 m_endPoint6->SetLocalAddress (route->GetSource ()); |
| 1884 m_routev6 = route; |
1881 return 0; | 1885 return 0; |
1882 } | 1886 } |
1883 | 1887 |
1884 /* This function is called only if a SYN received in LISTEN state. After | 1888 /* This function is called only if a SYN received in LISTEN state. After |
1885 TcpSocketBase cloned, allocate a new end point to handle the incoming | 1889 TcpSocketBase cloned, allocate a new end point to handle the incoming |
1886 connection and send a SYN+ACK to complete the handshake. */ | 1890 connection and send a SYN+ACK to complete the handshake. */ |
1887 void | 1891 void |
1888 TcpSocketBase::CompleteFork (Ptr<Packet> p, const TcpHeader& h, | 1892 TcpSocketBase::CompleteFork (Ptr<Packet> p, const TcpHeader& h, |
1889 const Address& fromAddress, const Address& toAddres
s) | 1893 const Address& fromAddress, const Address& toAddres
s) |
1890 { | 1894 { |
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1908 m_tcp->m_sockets.push_back (this); | 1912 m_tcp->m_sockets.push_back (this); |
1909 | 1913 |
1910 // Change the cloned socket from LISTEN state to SYN_RCVD | 1914 // Change the cloned socket from LISTEN state to SYN_RCVD |
1911 NS_LOG_INFO ("LISTEN -> SYN_RCVD"); | 1915 NS_LOG_INFO ("LISTEN -> SYN_RCVD"); |
1912 m_state = SYN_RCVD; | 1916 m_state = SYN_RCVD; |
1913 m_cnCount = m_cnRetries; | 1917 m_cnCount = m_cnRetries; |
1914 SetupCallback (); | 1918 SetupCallback (); |
1915 // Set the sequence number and send SYN+ACK | 1919 // Set the sequence number and send SYN+ACK |
1916 m_rxBuffer->SetNextRxSequence (h.GetSequenceNumber () + SequenceNumber32 (1)); | 1920 m_rxBuffer->SetNextRxSequence (h.GetSequenceNumber () + SequenceNumber32 (1)); |
1917 | 1921 |
| 1922 // Find a route for this socket |
| 1923 if (m_endPoint) |
| 1924 { |
| 1925 Ptr<Ipv4> ipv4 = m_node->GetObject<Ipv4>(); |
| 1926 if (ipv4 != 0) |
| 1927 { |
| 1928 Ipv4Header header; |
| 1929 header.SetDestination(m_endPoint->GetPeerAddress()); |
| 1930 Socket::SocketErrno errno_; |
| 1931 if (ipv4->GetRoutingProtocol() != 0) |
| 1932 { |
| 1933 m_routev4 = ipv4->GetRoutingProtocol()->RouteOutput(Ptr<Packet>(),
header, m_boundnetdevice, errno_); |
| 1934 } |
| 1935 else |
| 1936 { |
| 1937 NS_LOG_ERROR("No IPV4 Routing Protocol"); |
| 1938 m_routev4 = 0; |
| 1939 } |
| 1940 } |
| 1941 else |
| 1942 NS_FATAL_ERROR("Trying to use Tcp on a node without an Ipv4 interface"); |
| 1943 } |
| 1944 else if (m_endPoint6) |
| 1945 { |
| 1946 Ptr<Ipv6> ipv6 = m_node->GetObject<Ipv6>(); |
| 1947 if (ipv6 != 0) |
| 1948 { |
| 1949 Ipv6Header header; |
| 1950 header.SetDestinationAddress(m_endPoint6->GetPeerAddress()); |
| 1951 header.SetSourceAddress(m_endPoint6->GetLocalAddress()); |
| 1952 header.SetNextHeader(m_tcp->PROT_NUMBER); |
| 1953 Socket::SocketErrno errno_; |
| 1954 if (ipv6->GetRoutingProtocol() != 0) |
| 1955 { |
| 1956 m_routev6 = ipv6->GetRoutingProtocol()->RouteOutput(Ptr<Packet>(),
header, m_boundnetdevice, errno_); |
| 1957 } |
| 1958 else |
| 1959 { |
| 1960 NS_LOG_ERROR("No IPV4 Routing Protocol"); |
| 1961 m_routev6 = 0; |
| 1962 } |
| 1963 } |
| 1964 else |
| 1965 NS_FATAL_ERROR("Trying to use Tcp on a node without an Ipv6 interface"); |
| 1966 } |
| 1967 |
1918 SendEmptyPacket (TcpHeader::SYN | TcpHeader::ACK); | 1968 SendEmptyPacket (TcpHeader::SYN | TcpHeader::ACK); |
1919 } | 1969 } |
1920 | 1970 |
1921 void | 1971 void |
1922 TcpSocketBase::ConnectionSucceeded () | 1972 TcpSocketBase::ConnectionSucceeded () |
1923 { // Wrapper to protected function NotifyConnectionSucceeded() so that it can | 1973 { // Wrapper to protected function NotifyConnectionSucceeded() so that it can |
1924 // be called as a scheduled event | 1974 // be called as a scheduled event |
1925 NotifyConnectionSucceeded (); | 1975 NotifyConnectionSucceeded (); |
1926 // The if-block below was moved from ProcessSynSent() to here because we need | 1976 // The if-block below was moved from ProcessSynSent() to here because we need |
1927 // to invoke the NotifySend() only after NotifyConnectionSucceeded() to | 1977 // to invoke the NotifySend() only after NotifyConnectionSucceeded() to |
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2031 | 2081 |
2032 NS_LOG_LOGIC (this << " SendDataPacket Schedule ReTxTimeout at time " << | 2082 NS_LOG_LOGIC (this << " SendDataPacket Schedule ReTxTimeout at time " << |
2033 Simulator::Now ().GetSeconds () << " to expire at time " << | 2083 Simulator::Now ().GetSeconds () << " to expire at time " << |
2034 (Simulator::Now () + m_rto.Get ()).GetSeconds () ); | 2084 (Simulator::Now () + m_rto.Get ()).GetSeconds () ); |
2035 m_retxEvent = Simulator::Schedule (m_rto, &TcpSocketBase::ReTxTimeout, thi
s); | 2085 m_retxEvent = Simulator::Schedule (m_rto, &TcpSocketBase::ReTxTimeout, thi
s); |
2036 } | 2086 } |
2037 NS_LOG_LOGIC ("Send packet via TcpL4Protocol with flags 0x" << std::hex << sta
tic_cast<uint32_t> (flags) << std::dec); | 2087 NS_LOG_LOGIC ("Send packet via TcpL4Protocol with flags 0x" << std::hex << sta
tic_cast<uint32_t> (flags) << std::dec); |
2038 if (m_endPoint) | 2088 if (m_endPoint) |
2039 { | 2089 { |
2040 m_tcp->SendPacket (p, header, m_endPoint->GetLocalAddress (), | 2090 m_tcp->SendPacket (p, header, m_endPoint->GetLocalAddress (), |
2041 m_endPoint->GetPeerAddress (), m_boundnetdevice); | 2091 m_endPoint->GetPeerAddress (), m_boundnetdevice, m_rout
ev4); |
2042 } | 2092 } |
2043 else | 2093 else |
2044 { | 2094 { |
2045 m_tcp->SendPacket (p, header, m_endPoint6->GetLocalAddress (), | 2095 m_tcp->SendPacket (p, header, m_endPoint6->GetLocalAddress (), |
2046 m_endPoint6->GetPeerAddress (), m_boundnetdevice); | 2096 m_endPoint6->GetPeerAddress (), m_boundnetdevice, m_rou
tev6); |
2047 } | 2097 } |
2048 | 2098 |
2049 // update the history of sequence numbers used to calculate the RTT | 2099 // update the history of sequence numbers used to calculate the RTT |
2050 if (isRetransmission == false) | 2100 if (isRetransmission == false) |
2051 { // This is the next expected one, just log at end | 2101 { // This is the next expected one, just log at end |
2052 m_history.push_back (RttHistory (seq, sz, Simulator::Now () )); | 2102 m_history.push_back (RttHistory (seq, sz, Simulator::Now () )); |
2053 } | 2103 } |
2054 else | 2104 else |
2055 { // This is a retransmit, find in list and mark as re-tx | 2105 { // This is a retransmit, find in list and mark as re-tx |
2056 for (RttHistory_t::iterator i = m_history.begin (); i != m_history.end ();
++i) | 2106 for (RttHistory_t::iterator i = m_history.begin (); i != m_history.end ();
++i) |
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2397 else | 2447 else |
2398 { | 2448 { |
2399 tcpHeader.SetSourcePort (m_endPoint6->GetLocalPort ()); | 2449 tcpHeader.SetSourcePort (m_endPoint6->GetLocalPort ()); |
2400 tcpHeader.SetDestinationPort (m_endPoint6->GetPeerPort ()); | 2450 tcpHeader.SetDestinationPort (m_endPoint6->GetPeerPort ()); |
2401 } | 2451 } |
2402 AddOptions (tcpHeader); | 2452 AddOptions (tcpHeader); |
2403 | 2453 |
2404 if (m_endPoint != 0) | 2454 if (m_endPoint != 0) |
2405 { | 2455 { |
2406 m_tcp->SendPacket (p, tcpHeader, m_endPoint->GetLocalAddress (), | 2456 m_tcp->SendPacket (p, tcpHeader, m_endPoint->GetLocalAddress (), |
2407 m_endPoint->GetPeerAddress (), m_boundnetdevice); | 2457 m_endPoint->GetPeerAddress (), m_boundnetdevice, m_rout
ev4); |
2408 } | 2458 } |
2409 else | 2459 else |
2410 { | 2460 { |
2411 m_tcp->SendPacket (p, tcpHeader, m_endPoint6->GetLocalAddress (), | 2461 m_tcp->SendPacket (p, tcpHeader, m_endPoint6->GetLocalAddress (), |
2412 m_endPoint6->GetPeerAddress (), m_boundnetdevice); | 2462 m_endPoint6->GetPeerAddress (), m_boundnetdevice, m_rou
tev6); |
2413 } | 2463 } |
2414 NS_LOG_LOGIC ("Schedule persist timeout at time " | 2464 NS_LOG_LOGIC ("Schedule persist timeout at time " |
2415 << Simulator::Now ().GetSeconds () << " to expire at time " | 2465 << Simulator::Now ().GetSeconds () << " to expire at time " |
2416 << (Simulator::Now () + m_persistTimeout).GetSeconds ()); | 2466 << (Simulator::Now () + m_persistTimeout).GetSeconds ()); |
2417 m_persistEvent = Simulator::Schedule (m_persistTimeout, &TcpSocketBase::Persis
tTimeout, this); | 2467 m_persistEvent = Simulator::Schedule (m_persistTimeout, &TcpSocketBase::Persis
tTimeout, this); |
2418 } | 2468 } |
2419 | 2469 |
2420 void | 2470 void |
2421 TcpSocketBase::Retransmit () | 2471 TcpSocketBase::Retransmit () |
2422 { | 2472 { |
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2833 : seq (s), count (c), time (t), retx (false) | 2883 : seq (s), count (c), time (t), retx (false) |
2834 { | 2884 { |
2835 } | 2885 } |
2836 | 2886 |
2837 RttHistory::RttHistory (const RttHistory& h) | 2887 RttHistory::RttHistory (const RttHistory& h) |
2838 : seq (h.seq), count (h.count), time (h.time), retx (h.retx) | 2888 : seq (h.seq), count (h.count), time (h.time), retx (h.retx) |
2839 { | 2889 { |
2840 } | 2890 } |
2841 | 2891 |
2842 } // namespace ns3 | 2892 } // namespace ns3 |
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