📄 22.htm
字号:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>CTerm非常精华下载</title>
</head>
<body bgcolor="#FFFFFF">
<table border="0" width="100%" cellspacing="0" cellpadding="0" height="577">
<tr><td width="32%" rowspan="3" height="123"><img src="DDl_back.jpg" width="300" height="129" alt="DDl_back.jpg"></td><td width="30%" background="DDl_back2.jpg" height="35"><p align="center"><a href="http://apue.dhs.org"><font face="黑体"><big><big>123</big></big></font></a></td></tr>
<tr>
<td width="68%" background="DDl_back2.jpg" height="44"><big><big><font face="黑体"><p align="center"> ● UNIX网络编程 (BM: clown) </font></big></big></td></tr>
<tr>
<td width="68%" height="44" bgcolor="#000000"><font face="黑体"><big><big><p align="center"></big></big><a href="http://cterm.163.net"><img src="banner.gif" width="400" height="60" alt="banner.gif"border="0"></a></font></td>
</tr>
<tr><td width="100%" colspan="2" height="100" align="center" valign="top"><br><p align="center">[<a href="index.htm">回到开始</a>][<a href="16.htm">上一层</a>][<a href="23.htm">下一篇</a>]
<hr><p align="left"><small>发信人: fion (fion), 信区: UNP <br>
标 题: unix socket faq (1) <br>
发信站: UNIX编程 (2001年07月07日09:36:46 星期六), 站内信件 <br>
<br>
<br>
Newsgroups: comp.unix.programmer,comp.unix.answers,comp.answers,news.answers <br>
From: vic@brutus.tlug.org (Vic Metcalfe) <br>
Subject: [comp.unix.programmer] Unix-socket-faq for network programming <br>
Followup-To: comp.unix.programmer <br>
X-Newsreader: TIN [version 1.2 PL2] <br>
Organization: Zymurgy Systems, Aurora, Ontario, Canada <br>
Message-ID: <1998Mar22.123227.1526@brutus.tlug.org> <br>
Date: Sun, 22 Mar 1998 12:32:27 GMT <br>
Summary: This posting offers answers to frequent questions about network <br>
programming in the unix environment using sockets. <br>
Archive-name: unix-faq/socket <br>
Posting-Frequency: monthly <br>
Last-modified: 1998/01/22 <br>
URL: http://www.ibrado.com/sock-faq/ <br>
Programming UNIX Sockets in C - Frequently Asked Questions <br>
Created by Vic Metcalfe, Andrew Gierth and other con- <br>
tributers <br>
January 22, 1998 <br>
This is a list of frequently asked questions, with answers about pro- <br>
gramming TCP/IP applications in unix with the sockets interface. <br>
______________________________________________________________________ <br>
<br>
Table of Contents: <br>
1. General Information and Concepts <br>
1.1. About this FAQ <br>
1.2. Who is this FAQ for? <br>
1.3. What are Sockets? <br>
1.4. How do Sockets Work? <br>
1.5. Where can I get source code for the book [book title]? <br>
1.6. Where can I get more information? <br>
<br>
2. Questions regarding both Clients and Servers (TCP/SOCK_STREAM) <br>
2.1. How can I tell when a socket is closed on the other end? <br>
2.2. What's with the second parameter in bind()? <br>
2.3. How do I get the port number for a given service? <br>
2.4. If bind() fails, what should I do with the socket descriptor? <br>
2.5. How do I properly close a socket? <br>
2.6. When should I use shutdown()? <br>
2.7. Please explain the TIME_WAIT state. <br>
2.8. Why does it take so long to detect that the peer died? <br>
2.9. What are the pros/cons of select(), non-blocking I/O and <br>
SIGIO? <br>
2.10. Why do I get EPROTO from read()? <br>
2.11. How can I force a socket to send the data in its buffer? <br>
2.12. Where can a get a library for programming sockets? <br>
2.13. How come select says there is data, but read returns zero? <br>
2.14. Whats the difference between select() and poll()? <br>
2.15. How do I send [this] over a socket? <br>
2.16. How do I use TCP_NODELAY? <br>
2.17. What exactly does the Nagle algorithm do? <br>
2.18. What is the difference between read() and recv()? <br>
2.19. I see that send()/write() can generate SIGPIPE. Is there any <br>
advantage to handling the signal, rather than just ignoring <br>
it and checking for the EPIPE error? Are there any useful <br>
parameters passed to the signal catching function? <br>
2.20. After the chroot(), calls to socket() are failing. Why? <br>
2.21. Why do I keep getting EINTR from the socket calls? <br>
2.22. When will my application receive SIGPIPE? <br>
2.23. What are socket exceptions? What is out-of-band data? <br>
2.24. How can I find the full hostname (FQDN) of the system I'm <br>
running on? <br>
<br>
<br>
3. Writing Client Applications (TCP/SOCK_STREAM) <br>
3.1. How do I convert a string into an internet address? <br>
3.2. How can my client work through a firewall/proxy server? <br>
3.3. Why does connect() succeed even before my server did an <br>
accept()? <br>
3.4. Why do I sometimes lose a server's address when using more <br>
than one server? <br>
3.5. How can I set the timeout for the connect() system call? <br>
3.6. Should I bind() a port number in my client program, or let the <br>
system choose one for me on the connect() call? <br>
3.7. Why do I get "connection refused" when the server isn't <br>
running? <br>
3.8. What does one do when one does not know how much information <br>
is comming over the socket ? Is there a way to have a dynamic buffer ? <br>
<br>
4. Writing Server Applications (TCP/SOCK_STREAM) <br>
4.1. How come I get "address already in use" from bind()? <br>
4.2. Why don't my sockets close? <br>
4.3. How can I make my server a daemon? <br>
4.4. How can I listen on more than one port at a time? <br>
4.5. What exactly does SO_REUSEADDR do? <br>
4.6. What exactly does SO_LINGER do? <br>
4.7. What exactly does SO_KEEPALIVE do? <br>
4.8. How can I bind() to a port number < 1024? <br>
4.9. How do I get my server to find out the client's address / <br>
hostname? <br>
4.10. How should I choose a port number for my server? <br>
4.11. What is the difference between SO_REUSEADDR and SO_REUSEPORT? <br>
4.12. How can I write a multi-homed server? <br>
4.13. How can I read only one character at a time? <br>
4.14. I'm trying to exec() a program from my server, and attach my <br>
socket's IO to it, but I'm not getting all the data across. Why? <br>
<br>
5. Writing UDP/SOCK_DGRAM applications <br>
5.1. When should I use UDP instead of TCP? <br>
5.2. What is the difference between "connected" and "unconnected" <br>
sockets? <br>
5.3. Does doing a connect() call affect the receive behaviour of <br>
the socket? <br>
5.4. How can I read ICMP errors from "connected" UDP sockets? <br>
5.5. How can I be sure that a UDP message is received? <br>
5.6. How can I be sure that UDP messages are received in order? <br>
5.7. How often should I re-transmit un-acknowleged messages? <br>
5.8. How come only the first part of my datagram is getting <br>
through? <br>
5.9. Why does the socket's buffer fill up sooner than expected? <br>
<br>
6. Advanced Socket Programming <br>
6.1. How would I put my socket in non-blocking mode? <br>
6.2. How can I put a timeout on connect()? <br>
<br>
7. Sample Source Code <br>
______________________________________________________________________ <br>
-- <br>
※ 来源:·UNIX编程 www.tiaozhan.com/unixbbs/·[FROM: 211.69.197.132] <br>
</small><hr>
<p align="center">[<a href="index.htm">回到开始</a>][<a href="16.htm">上一层</a>][<a href="23.htm">下一篇</a>]
<p align="center"><a href="http://cterm.163.net">欢迎访问Cterm主页</a></p>
</table>
</body>
</html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -