TCP/IP详解 卷3 TCP事务协议、HTTP、NNTP和UNIX域协议 英文版PDF电子书下载

Part 1. TCP for Transactions 1

Chapter 1. T/TCP Introduction 3

1.1 Introduction 3

1.2 UDP Client-Server 3

1.3 TCP Client-Server 9

1.4 T/TCP Client-Server 17

1.5 Test Network 20

1.6 Timing Example 21

1.7 Applications 22

1.8 History 24

1.9 Implementations 26

1.10 Summary 28

Chapter 2. T/TCP Protocol 29

2.1 Introduction 29

2.2 New TCP Options for T/TCP 30

2.3 T/TCP Implementation Variables 33

2.4 State Transition Diagram 34

2.5 T/TCP Extended States 36

2.6 Summary 38

Chapter 3. T/TCP Examples 39

3.1 Introduction 39

3.2 Clienl Reboot 40

3.3 Normal T/TCP Transaction 42

3.4 Server Receives Old Duplicate SYN 43

3.5 Server Reboot 44

3.6 Request or Reply Exceeds MSS 45

3.7 Backward Compatibility 49

3.8 Summary 51

Chapter 4. T/TCP Protocol (Continued) 53

4.1 Introduction 53

4.2 Client Porl Numbers and TIME_WAIT State 53

4.3 Purpose of the TIME_WAIT State 56

4.4 TIME_WAIT State Truncation 59

4.5 Avoiding the Three-Way Handshake with TAO 62

4.6 Summary 68

Chapter 5. T/TCP Implementation:Socket Layer 69

5.1 Introduction 69

5.2 Constants 70

5.3 sosend Function 70

5.4 Summary 72

Chapter 6. T/TCP Implementation:Routing Table 73

6.1 Introduction 73

6.2 Code Introduction 74

6.4 rtentry Structure 75

6.3 radix_node_head Structure 75

6.5 rt_metrics Structure 76

6.6 in_inithead Function 76

6.7 in_addroute Function 77

6.8 in_matroute Function 78

6.9 in_clsroute Function 78

6.10 in_rtqtimo Function 79

6.11 in_rtqkill Function 82

6.12 Summary 85

Chapter 7. T/TCP Implementation:Protocol Control Blocks 87

7.1 Introduction 87

7.2 in_pcbladdr Function 88

7.3 in_pcbconnect Function 89

7.4 Summary 90

Chapter 8. T/TCP Implementation:TCP Overview 91

8.1 Introduction 91

8.2 Code Introduction 91

8.3 TCP protosw Structure 92

8.4 TCP Control Block 93

8.5 tcp_init Function 94

8.6 tcp_slowtimo Function 94

8.7 Summary 95

9.2 tcp_output Function 97

Chapter 9. T/TCP Implementation:TCP Output 97

9.1 Introduction 97

9.3 Summary 104

Chapter 10. T/TCP Implementation:TCP Functions 105

10.1 Introduction 105

10.2 tcp_newtcpcb Function 105

10.3 tcp_rtlookup Function 106

10.4 tcp_gettaocache Function 108

10.5 Retransmission Timeout Calculations 108

10.6 tcp_close Function 112

10.7 tcp_msssend Function 113

10.8 tcp_mssrcvd Function 114

10.9 tcp_dooptions Function 121

10.10 tcp_reass Function 122

10.11 Summary 124

Chapter 11. T/TCP Implementation:TCP Input 125

11.1 Introduction 125

11.2 Preliminary Processing 125

11.3 Header Prediction 129

11.4 Initiation of Passive Open 130

11.5 Initiation of Active Open 134

11.6 PAWS:Protection Against Wrapped Sequence Numbers 141

11.8 Completion of Passive Opens and Simultaneous Opens 142

11.7 ACK Processing 142

11.9 ACK Processing(Continued) 143

11.10 FIN Processing 145

11.11 Summary 147

Chapter 12. T/TCP Implementation:TCP User Requests 149

12.1 Introduction 149

12.2 PRU_CONNECT Request 149

12.3 tcp_connect Function 150

12.4 PRU_SEND and PRU_SEND_EOF Requests 154

12.5 tcp_usrclosed Function 155

12.6 tcp_sysctl Function 155

12.7 T/TCP Futures 156

12.8 Summary 158

Part 2. Additional TCP Applications 159

Chapter 13. HTTP:Hypertext Transfer Protocol 161

13.1 Introduction 161

13.2 Introduction to HTTP and HTML 162

13.3 HTTP Protocol 165

13.4 An Example 170

13.5 HTTP Statistics 172

13.6 Performance Problems 173

13.7 Summary 175

14.1 Introduction 177

Chapter 14. Packets Found on an HTTP Server 177

14.2 Multiple HTTP Servers 180

14.3 Client SYN lnterarrival Time 181

14.4 RTT Measurements 185

14.5 listen Backlog Queue 187

14.6 Client SYN Options 192

14.7 Client SYN Retransmissions 195

14.8 Domain Names 196

14.9 Timing Out Persist Probes 196

14.10 Simulation of T/TCP Routing Table Size 200

14.11 Mbuf Interaction 202

14.12 TCP PCB Cache and Header Prediction 203

14.13 Summary 205

Chapter 15. NNTP:Network News Transfer Protocol 207

15.1 Introduction 207

15.2 NNTP Protocol 209

15.3 A Simple News Client 212

15.4 A More Sophisticated News Client 214

15.5 NNTP Statistics 215

15.6 Summary 216

Part 3. The Unix Domain Protocols 219

16.1 Introduction 221

Chapter 16. Unix Domain Protocols:Introduction 221

16.2 Usage 222

16.3 Performance 223

16.4 Coding Examples 224

16.5 Summary 225

Chapter 17. Unix Domain Protocols:Implementation 227

17.1 Introduction 227

17.2 Code Introduction 227

17.3 Unix domain and protosw Structures 228

17.4 Unix Domain Socket Address Structures 230

17.5 Unix Domain Protocol Control Blocks 231

17.6 uipc_usrreq Function 233

17.7 PRU_ATTACH Request and unp_attach Function 233

17.8 PRU_DETACH Request and unp_detach Function 236

17.9 PRU_BIND Request and unp_bind Function 237

17.10 PRU_CONNECT Request and unp_connect Function 240

17.11 PRU_CONNECT2 Request and unp_connect2 Function 245

17.12 socke?pair System Call 249

17.13 pipe Syetem Call 253

17.14 PRU_ACCEPT Request 253

17.15 PRU_DISCONNECT Request and unp_disconnect Function 255

17.16 PRU_SHUTDOWN Request and unp_shutdown Function 257

17.17 PRU_ABORT Request and unp_drop Function 258

17.18 Miscellaneous Requests 259

17.19 Summary 261

Chapter 18. Unix Domain Protocols:I/O and Descriptor Passing 263

18.1 Introduction 263

18.2 PRU_SEND and PRU_RCVD Requests 263

18.3 Oescriptor Passing 269

18.4 unp_internalize Function 274

18.5 unp_externalize Function 276

18.6 unp_discard Function 277

18.8 unp_scan Function 278

18.7 unp_dispose Function 278

18.9 unp_gc Function 280

18.10 unp_mark Function 288

18.11 Performance(Revisited) 288

18.12 Summary 289

Appendix A. Measuring Network Times 291

A.1 RTT Measurements Using Ping 292

A.2 Protocol Stack Measurements 294

A.3 Latency and Bandwidth 300

Appendix B. Coding Applications for T/TCP 303

Bibliography 309

Index 315