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Tcpip stack(2) - L3 send and receve. Struct msghdr 保存数据。在. Struct sk buff 保存数据，这个结构被整个网络协议栈使用，如. UDP 等。并且其中的成员变量在结构从一层向另一层传递时解析本层的数据头。 Ip router output flow 根据saddr和daddr在rt hash table中查找路由表。如果没有找到则查找fib，并 mkroute output创建struct rtable。将rtable加入rt hash table. Neigh create:根据rtable- dst entry创建struct neigh邻居,设置定时操作neigh timer handler,. Ip append data 将大数据分片,创建struct sk buffer,并将其加入struct sk- sk write queue. Ip push pending frames. Ip finish skb 构造ip头. Ip finish output 如果在hh cache中找到daddr信息则将数据传到driver.

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Tcpip stack(2) - L3 send and receve. Struct msghdr 保存数据。在. Struct sk buff 保存数据，这个结构被整个网络协议栈使用，如. UDP 等。并且其中的成员变量在结构从一层向另一层传递时解析本层的数据头。 Ip router output flow 根据saddr和daddr在rt hash table中查找路由表。如果没有找到则查找fib，并 mkroute output创建struct rtable。将rtable加入rt hash table. Neigh create:根据rtable- dst entry创建struct neigh邻居,设置定时操作neigh timer handler,. Ip append data 将大数据分片,创建struct sk buffer,并将其加入struct sk- sk write queue. Ip push pending frames. Ip finish skb 构造ip头. Ip finish output 如果在hh cache中找到daddr信息则将数据传到driver.

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1 chenrui

2 搜尋此網誌

3 数据传输的数据结构

4 bsd socket 层使用

5 inet socket 层以下使用

6 mac 或其他

7 l2 链路协议，三层

8 ip ，四层

9 tcp 或

10 网络层数据收发

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chenrui,搜尋此網誌,数据传输的数据结构,bsd socket 层使用,inet socket 层以下使用,mac 或其他,l2 链路协议，三层,ip ，四层,tcp 或,网络层数据收发,a发送数据,raw sendmsg,arp constructor设置arp处理函数,ip send skb,neigh resolve output,b发送数据,process backlog,ip rcv 解析ip头,ip rcv finish,big bang,沒有留言,以電子郵件傳送這篇文章,if p

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chenrui | chennrui.blogspot.com Reviews

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Tcpip stack(2) - L3 send and receve. Struct msghdr 保存数据。在. Struct sk buff 保存数据，这个结构被整个网络协议栈使用，如. UDP 等。并且其中的成员变量在结构从一层向另一层传递时解析本层的数据头。 Ip router output flow 根据saddr和daddr在rt hash table中查找路由表。如果没有找到则查找fib，并 mkroute output创建struct rtable。将rtable加入rt hash table. Neigh create:根据rtable- dst entry创建struct neigh邻居,设置定时操作neigh timer handler,. Ip append data 将大数据分片,创建struct sk buffer,并将其加入struct sk- sk write queue. Ip push pending frames. Ip finish skb 构造ip头. Ip finish output 如果在hh cache中找到daddr信息则将数据传到driver.

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chennrui.blogspot.com

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chenrui: 一月 2011

http://chennrui.blogspot.com/2011_01_01_archive.html

The relationship between pad and caps. Name template(eg:wavparse src, wavparse sink) -direction(src or sink) GstStaticPadTemplate- -presence(Sometimes, Always, request) -GstCaps(String is stored in GstStruct) -GstStaticCaps- - -String(support caps) gst static pad template get() -GstObject V GstPadTemplate- - - -direction -presence -GstCaps gst pad new from static template() V -GstObject GstPad- - - - -GstPadTemplate . Add pad into element and set relation. Set pad active from srcpad to sinkpad. GST STATE...

2

chenrui: study kernel(3) -- memory,vfs

http://chennrui.blogspot.com/2011/07/study-kernel3-memoryvfs.html

Study kernel(3) - memory,vfs. 1．逻辑地址：每个逻辑地址都有一个段和偏移量组成，偏移量指明从段开始的地方到实际地址之间的距离。Linux中逻辑地址总是与线性地址一致。 2．线性地址：虚拟地址。32位系统有4G的线性地址，64位系统有8G线性地址。 3．物理地址：物理内存的实际地址。页：线性地址被分成固定长度为单位的组。页内部连续的线性地址被映射到连续的物理地址中。页既指一组线性地址，又指这组地址中的数据。Linux每一页有4KB容量。页框：或物理页。一个页框包含一个页，因此页框长度与页长度一致。页可存放在任何一个物理页中。页框就是物理内存。内核中用页述符struct page描述每一个页框的状态信息，所有的页描述符都保存在mem map数组中。 Unsigned long flags; / 描述页框状态. Atomic t count; / 页框的引用计数. Atomic t mapcount; / 页框中页表数目. Void *virtual; / 页框的虚拟地址. Slab的使用：(struct task struct). Linux操作系统采用虚拟内存管理...

3

chenrui: tcpip stack(2) -- L3 send and receve

http://chennrui.blogspot.com/2011/08/tcpip-stack2-l3-send-and-receve.html

Tcpip stack(2) - L3 send and receve. Struct msghdr 保存数据。在. Struct sk buff 保存数据，这个结构被整个网络协议栈使用，如. UDP 等。并且其中的成员变量在结构从一层向另一层传递时解析本层的数据头。 Ip router output flow 根据saddr和daddr在rt hash table中查找路由表。如果没有找到则查找fib，并 mkroute output创建struct rtable。将rtable加入rt hash table. Neigh create:根据rtable- dst entry创建struct neigh邻居,设置定时操作neigh timer handler,. Ip append data 将大数据分片,创建struct sk buffer,并将其加入struct sk- sk write queue. Ip push pending frames. Ip finish skb 构造ip头. Ip finish output 如果在hh cache中找到daddr信息则将数据传到driver.

4

chenrui: study kernel(2) -- sync, interrupt

http://chennrui.blogspot.com/2011/07/study-kernel2-sync-interrupt.html

Study kernel(2) - sync, interrupt. Linux提供了一系列C语言函数来实现内核中的原子操作，这些函数又分为两类，分别针对bit变量和整数变量进行原子操作。它们的共同点是在任何情况下都是原子的，内核代码可以安全的调用它们而不被中断，而且它们都依赖底层CPU的原子操作来实现-所有这些函数都是CPU架构相关的。其实现在atomic.h和bitops.h中. CPU具备屏蔽中断和打开中断的功能，这项功能可以保证正在执行的内核控制路径不被中断处理程序所抢占，防止某些竞争条件的发生。Linux提供了local irq disable()/local irq enable()，local irq save()/local irq restone()来实现屏蔽/开启中断的功能。信号量为了解决多个内核控制路径竞争资源的问题，这些内核控制路径可能是单处理器系统中分时执行的控制路径，也可能是多处理器系统中的并行执行的控制路径。在试图获得信号量的时候，如果信号量繁忙，相应的内核控制路径会挂起，直到信号量被释放...A 代码量应越少越好，以便中断函数的快速执行。上述两个条件中，...

5

chenrui: tcpip stack(1) -- init

http://chennrui.blogspot.com/2011/07/tcpip-stack1-init.html

Tcpip stack(1) - init. Static struct vfsmount *sock mnt read mostly;. Static int init sock init(void). Skb init(); / 为socket buffer创建高速缓存. Init inodecache(); / 为struct sock alloc创建高速缓存. Register filesystem(&sock fs type);. Sock mnt = kern mount(&sock fs type);. Static struct file system type sock fs type = {. Name = "sockfs",. Mount = sockfs mount,. Kill sb = kill anon super,. Static struct file system type *file systems;. Int register filesystem(struct file system type * fs). Struct file system type * p;.

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sinkpad.blogspot.com

sinkpad: January 2011

http://sinkpad.blogspot.com/2011_01_01_archive.html

I am what I am. From zero to hero. Sunday, 30 January 2011. Xingmux adds a Xing header to MP3 files. This contains information about the duration and size. Of the file and a seek table and is very useful for getting an almost correct duration and better. Seeking on VBR MP3 files. This element will remove any existing Xing, LAME or VBRI headers from the beginning of the file. Pad templates and the element details are registered with the plugin during the gst xing mux base init(). 85 static GstStaticPadTem...

sinkpad.blogspot.com

sinkpad: February 2012

http://sinkpad.blogspot.com/2012_02_01_archive.html

I am what I am. From zero to hero. Monday, 27 February 2012. The default path of the command is /usr/sbin. Add one user to one group:. Here use the option '-a'. A, - append append the user to the supplemental GROUPS. Mentioned by the -G option without removing. Him/her from other groups. Usr/sbin/usermod -a -G group1 user name. Remove one user from one group, you have to move that user to another group:. Usr/sbin/usermod -G group2 user name. Subscribe to: Posts (Atom).

sinkpad.blogspot.com

sinkpad: September 2012

http://sinkpad.blogspot.com/2012_09_01_archive.html

I am what I am. From zero to hero. Tuesday, 25 September 2012. 用 sed 去掉去掉windows下的回车符. 65288;注意 M 在linux 下写法按 M 是回车换行符,输入方法是按住CTRL v,松开v,按m). Sed -i 's/ M/ g' df.txt. Switch field codes [Alt] [F9]. Subscribe to: Posts (Atom). Simple template. Powered by Blogger.

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sinkpad: May 2011

http://sinkpad.blogspot.com/2011_05_01_archive.html

I am what I am. From zero to hero. Monday, 16 May 2011. How to read the source code. Some workmates talked about how to read the source this afternoon. I found that I don't know how to read the source exactly. I found the following words about how to read source code:. 1 It's boring and hard, so must carry on. 2 If it's really too difficult, read some related books or documents first. It helps you to know the source code better. 4 Know the priority of every parts. first need, first study. Now it's so easy.

sinkpad.blogspot.com

sinkpad: December 2013

http://sinkpad.blogspot.com/2013_12_01_archive.html

I am what I am. From zero to hero. Friday, 27 December 2013. 在ubuntu 12.04LTS下安装 Clearlooks主题. 首先查看GTK的版本，我的是3.4.2. Dpkg -s libgtk-3-0 grep ' Version'. Version: 3.4.2-0ubuntu0.5. GTK 30 and 3.2). GTK 36 and newer). Sudo cp -r Clearlooks-Phenix /usr/share/themes/. Sudo apt-get install gnome-tweak-tool. 选择 *Theme GTK theme* Clearlooks-Phenix. Http:/ gnome-look.org/content/show.php/Clearlooks-Phenix? How to install clearlooks theme on Ubuntu 12.04LTS. Dpkg -s libgtk-3-0 grep ' Version'. Bin/sh, not sure why.

sinkpad.blogspot.com

sinkpad: R cannot be resolved to a variable

http://sinkpad.blogspot.com/2014/08/r-cannot-be-resolved-to-variable.html

I am what I am. From zero to hero. Wednesday, 13 August 2014. R cannot be resolved to a variable. Android开发过程中，碰到R cannot be resolved to a variable的报错信息，好像没有很确定的错误原因，一般来说，总结出几个可能的解决方法，希望试过以后管用。。。 1 检查Android 的SDK是否丢失需要重新下载，检查build path. 2确保class没有import Android.R；. 4检查AndroidManifest.xml文件，里边的package，layout配置文件，strings.xml等的字符串全部书写正确. 7删掉gen文件夹，使R.java重新自动生成一次，如果不能生成，继续检查layout的xml文件是否有如上不易发觉的问题. 8Clean project ，重新build，或者重新import project。 Subscribe to: Post Comments (Atom). Error: cannot find -lsonivox.

sinkpad.blogspot.com

sinkpad: December 2010

http://sinkpad.blogspot.com/2010_12_01_archive.html

I am what I am. From zero to hero. Tuesday, 28 December 2010. Git is the fast version control system. Now I am studying how to use git. Here are the commands for common using:. To check out sources. i.e. Download pulseaudio sources:. Git clone git:/ git.0pointer.de/pulseaudio.git. To show your working tree status. To update the codes to the newest version. Git pull origin master. Add or edit your file. Commit your new file. Git add your-file git commit -m 'log'. Push your change to remote repository.

sinkpad.blogspot.com

sinkpad: March 2014

http://sinkpad.blogspot.com/2014_03_01_archive.html

I am what I am. From zero to hero. Thursday, 6 March 2014. Error: stray ‘ 302’ in program. Make and meet this error! Gcc -g -Wall -o test callback simple.c. Callback simple.c:7:1: error: stray ‘ 302’ in program. Callback simple.c:7:1: error: stray ‘ 240’ in program. Callback simple.c:9:1: error: stray ‘ 302’ in program. Callback simple.c:9:1: error: stray ‘ 240’ in program. Callback simple.c: In function ‘sig handler’:. Callback simple.c:13:5: error: stray ‘ 302’ in program. 11 12 15 40- 176'.

sinkpad.blogspot.com

sinkpad: August 2014

http://sinkpad.blogspot.com/2014_08_01_archive.html

I am what I am. From zero to hero. Wednesday, 13 August 2014. R cannot be resolved to a variable. Android开发过程中，碰到R cannot be resolved to a variable的报错信息，好像没有很确定的错误原因，一般来说，总结出几个可能的解决方法，希望试过以后管用。。。 1 检查Android 的SDK是否丢失需要重新下载，检查build path. 2确保class没有import Android.R；. 4检查AndroidManifest.xml文件，里边的package，layout配置文件，strings.xml等的字符串全部书写正确. 7删掉gen文件夹，使R.java重新自动生成一次，如果不能生成，继续检查layout的xml文件是否有如上不易发觉的问题. 8Clean project ，重新build，或者重新import project。 Monday, 11 August 2014. Error: cannot find -lsonivox.

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Tcpip stack(2) - L3 send and receve. Struct msghdr 保存数据。在. Struct sk buff 保存数据，这个结构被整个网络协议栈使用，如. UDP 等。并且其中的成员变量在结构从一层向另一层传递时解析本层的数据头。 Ip router output flow 根据saddr和daddr在rt hash table中查找路由表。如果没有找到则查找fib，并 mkroute output创建struct rtable。将rtable加入rt hash table. Neigh create:根据rtable- dst entry创建struct neigh邻居,设置定时操作neigh timer handler,. Ip append data 将大数据分片,创建struct sk buffer,并将其加入struct sk- sk write queue. Ip push pending frames. Ip finish skb 构造ip头. Ip finish output 如果在hh cache中找到daddr信息则将数据传到driver.

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What challenges First Amendment? June 24, 2014. In 2011, a study called Future of the First Amendment shows that only 51 percent of 9th to 12th graders agree that newspapers should be allowed to publish freely without government approval” (Nieman Reports). That is to say, another half of the high school students believe censorship, or restraint, overweighs free press. Roles of the First Amendment. But having protection from the Constitution doesn’t mean the press can publish everything. At leas...In Wash...

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