By Sameer Seth, M. Ajaykumar Venkatesulu
This e-book offers thorough wisdom of Linux TCP/IP stack and kernel framework for its community stack, together with entire wisdom of layout and implementation. beginning with easy client-server socket courses and progressing to advanced layout and implementation of TCP/IP protocol in linux, this e-book presents varied features of socket programming and significant TCP/IP similar algorithms. additionally, the textual content beneficial properties netfilter hook framework, a whole clarification of routing sub-system, IP QOS implementation, and community smooth IRQ. This e-book additional comprises parts on TCP kingdom computer implementation,TCP timer implementation on Linux, TCP reminiscence administration on Linux, and debugging TCP/IP stack utilizing lcrash
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Extra resources for TCP IP Architecture, Design and Implementation in Linux (Practitioners)
Sample text
In the former case, the sin_addr field of the socket address is initialized to the specific IP address and the same field needs to be initialized to INADDR_ANY in the latter case, line 31. Since this is INET address family, the sin_family field of the socket address is initialized to AF_INET. The port number to which we want to glue the services is initialized at line 32. The socket address is now ready for registration as object sockaddr_in. The socket address is passed to bind() call. If the return value is less than zero, the socket could not be bound to the given port number because there may be any reason, including the fact that a port number may already be allocated to some other services.
TCP may be accepting data, but the application is not allowed to read data over the socket. SHUT_WR. This disables writing of data over the socket. When application wants to send data over the socket after write side is shut down, the socket throws an error to the application, indicating that a pipe is broken. SHUT_RDWR. This disables further send and receive operations. 1 Kernel Shutdown Implementation Let’s see how shutdown is implemented in the kernel. sk→shutdown flags shutdown events. 2 SEND_SHUTDOWN, set to disable send events.
16. ps output showing process and associated threads (LWPs) created using a clone interface. 2. spwan_ksoftirqd(). themselves or are woken up by some other thread inside the kernel and are scheduled by the kernel as usual. Let’s take an example of ksoftirqd kernel thread to illustrate kernel threads. Soft IRQ are also processed by kernel daemons in case there is a lot to be processed by softIRQs; this is mostly true in the case of network packet processing. 2). kernel_thread() is called in a loop 402–410 to create one kernel thread per CPU.