The Linux Programming Interface: a linux and unix system Programming Handbook
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SOCKETS: SERVER DESIGN 1239 60.1 Iterative and Concurrent Servers................................................................................ 1239 60.2 An Iterative UDP echo Server ..................................................................................... 1240 60.3 A Concurrent TCP echo Server................................................................................... 1243 60.4 Other Concurrent Server Designs .............................................................................. 1245 60.5 The inetd (Internet Superserver) Daemon .................................................................... 1247 60.6 Summary................................................................................................................ 1252 60.7 Exercises ................................................................................................................ 1252 61 SOCKETS: ADVANCED TOPICS 1253 61.1 Partial Reads and Writes on Stream Sockets ............................................................... 1254 61.2 The shutdown() System Call ...................................................................................... 1256 61.3 Socket-Specific I/O System Calls: recv() and send() ..................................................... 1259 61.4 The sendfile() System Call......................................................................................... 1260 61.5 Retrieving Socket Addresses ..................................................................................... 1263 61.6 A Closer Look at TCP ............................................................................................... 1266 61.6.1 Format of a TCP Segment..................................................................... 1266 61.6.2 TCP Sequence Numbers and Acknowledgements.................................... 1268 61.6.3 TCP State Machine and State Transition Diagram ................................... 1269 61.6.4 TCP Connection Establishment .............................................................. 1270 61.6.5 TCP Connection Termination ................................................................ 1272 61.6.6 Calling shutdown() on a TCP Socket...................................................... 1273 61.6.7 The TIME_WAIT State.......................................................................... 1274 61.7 Monitoring Sockets: netstat ....................................................................................... 1275 61.8 Using tcpdump to Monitor TCP Traffic ........................................................................ 1276 61.9 Socket Options ....................................................................................................... 1278 61.10 The SO_REUSEADDR Socket Option................................................................................ 1279 61.11 Inheritance of Flags and Options Across accept() ......................................................... 1281 xxviii Contents in Detail 61.12 TCP Versus UDP ...................................................................................................... 1282 61.13 Advanced Features.................................................................................................. 1283 61.13.1 Out-of-Band Data ................................................................................ 1283 61.13.2 The sendmsg() and recvmsg() System Calls.............................................. 1284 61.13.3 Passing File Descriptors ....................................................................... 1284 61.13.4 Receiving Sender Credentials ............................................................... 1284 61.13.5 Sequenced-Packet Sockets.................................................................... 1285 61.13.6 SCTP and DCCP Transport-Layer Protocols ............................................. 1285 61.14 Summary................................................................................................................ 1286 61.15 Exercises ................................................................................................................ 1287 tải về 6.93 Mb. Chia sẻ với bạn bè của bạn:
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