Comments on: A Word on TIME_WAIT and CLOSE_WAIT http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/ Thu, 09 Sep 2010 03:22:13 +0000 http://wordpress.org/?v=2.7.1 hourly 1 By: anonymous http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-1794 anonymous Tue, 04 May 2010 07:29:26 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-1794 a SYN segment ==> an SYN segment ??? a SYN segment ==> an SYN segment ???

]]> By: sealinger http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-1787 sealinger Sun, 14 Feb 2010 08:59:28 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-1787 学习了，thanks 学习了，thanks

]]> By: fy http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-1783 fy Sat, 02 Jan 2010 14:20:36 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-1783 graphviz, dotty - I found:) graphviz, dotty - I found:)

]]> By: fy http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-1782 fy Sat, 02 Jan 2010 14:02:49 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-1782 请教下这2个 .dot 干嘛用呢？ 我在lighttpd的源码里面也发现类似的文件？ fastcgi-state.dot state.dot ??? 请教下这2个 .dot 干嘛用呢？
我在lighttpd的源码里面也发现类似的文件？
fastcgi-state.dot state.dot
???

]]> By: Joshua http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-1776 Joshua Fri, 11 Dec 2009 10:46:00 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-1776 @lzy 我没有重现你说的问题。BTW，可加我gtalk详细讨论一下。 @lzy
我没有重现你说的问题。BTW，可加我gtalk详细讨论一下。

]]> By: lzy http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-1775 lzy Thu, 10 Dec 2009 11:14:20 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-1775 请教个问题，我在客户端程序里为socket fd设置了SO_LINGER选项，启用了linger。下面是客户端开始部分代码： int sockfd = 0; struct sockaddr_in addr; struct linger lingopt; /* some code here */ if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) err_sys("create socket error"); lingopt.l_onoff = 1; lingopt.l_linger = 0; if (setsockopt(sockfd, SOL_SOCKET, SO_LINGER, &lingopt, sizeof(lingopt)) != 0) err_ret("set linger option error"); /* connect server */ if (connect(sockfd, (struct sockaddr*) &addr, sizeof(addr)) == -1) err_sys("connect error"); /* other code here */ 可见上面我打开了linger，并确认option被成功应用。这个客户端程序会在SIGQUIT后退出（ctrl+d）。程序退出后发现，尽管我已经成功的配置了linger选项l_onoff=1&l_linger=0，可是为什么当客户端程序退出后，通过netstat仍然可见TIME_WAIT状态的客户端socket？而不是客户端直接发RST并释放socket？还是os有配置的方法？我是Linux 2.6.31-15-generic #50-Ubuntu。 很简单的问题，之前一直想当然，今天无意中看到现象，还请赐教，多谢！ 另外我设置linger不是为了避免主动关闭端的TIME_WAIT状态，它的2个作用是很必要的。之所以今天配置了SO_LINGER选项是为了验证特定问题，对于l_onoff=1&l_linger=0设置下FIN发起端还出现TIME_WAIT现象与之前的理解违背，（当然与unp所说的情况也不一致）。 请教个问题，我在客户端程序里为socket fd设置了SO_LINGER选项，启用了linger。下面是客户端开始部分代码：

int sockfd = 0;
struct sockaddr_in addr;

struct linger lingopt;

/* some code here */

if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
err_sys(”create socket error”);

lingopt.l_onoff = 1;
lingopt.l_linger = 0;

if (setsockopt(sockfd, SOL_SOCKET, SO_LINGER, &lingopt, sizeof(lingopt)) != 0)
err_ret(”set linger option error”);

/* connect server */
if (connect(sockfd, (struct sockaddr*) &addr, sizeof(addr)) == -1)
err_sys(”connect error”);

/* other code here */

可见上面我打开了linger，并确认option被成功应用。这个客户端程序会在SIGQUIT后退出（ctrl+d）。程序退出后发现，尽管我已经成功的配置了linger选项l_onoff=1&l_linger=0，可是为什么当客户端程序退出后，通过netstat仍然可见TIME_WAIT状态的客户端socket？而不是客户端直接发RST并释放socket？还是os有配置的方法？我是Linux 2.6.31-15-generic #50-Ubuntu。

很简单的问题，之前一直想当然，今天无意中看到现象，还请赐教，多谢！

另外我设置linger不是为了避免主动关闭端的TIME_WAIT状态，它的2个作用是很必要的。之所以今天配置了SO_LINGER选项是为了验证特定问题，对于l_onoff=1&l_linger=0设置下FIN发起端还出现TIME_WAIT现象与之前的理解违背，（当然与unp所说的情况也不一致）。

]]> By: Arrix http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-1773 Arrix Sun, 25 Oct 2009 03:41:00 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-1773 Nice graphs and clear explanation! The meaning of CLOSE_WAIT and TIME_WAIT and the difference between them is also frequently asked in job interviews. Nice graphs and clear explanation! The meaning of CLOSE_WAIT and TIME_WAIT and the difference between them is also frequently asked in job interviews.

]]> By: TIME_WAIT vs CLOSE_WAIT « Praveen's Blog http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-1581 TIME_WAIT vs CLOSE_WAIT « Praveen's Blog Sat, 01 Aug 2009 09:52:50 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-1581 [...] TIME_WAIT vs CLOSE_WAIT By praveenmyls Cool link CLOSE_WAIT vs TIMEWAIT [...] [...] TIME_WAIT vs CLOSE_WAIT By praveenmyls Cool link CLOSE_WAIT vs TIMEWAIT [...]

]]> By: Joshua http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-478 Joshua Thu, 26 Mar 2009 10:43:59 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-478 Hi Chris, thank you very much for your sweet encouragement :) Hi Chris, thank you very much for your sweet encouragement :)

]]> By: Chris http://blog.zhuzhaoyuan.com/2009/03/a-word-on-time_wait-and-close_wait/comment-page-1/#comment-435 Chris Wed, 25 Mar 2009 00:58:21 +0000 http://blog.zhuzhaoyuan.com/?p=93#comment-435 Hey joshua, i just read your post, its really good! Ignore the rude comments, you've been very helpful to me. Hey joshua, i just read your post, its really good! Ignore the rude comments, you’ve been very helpful to me.

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