tcp ip illustrated volume 1

TCP/IP protocolDanbo 2015-7-2This article for reference TCP/IP detailed volume one, some knowledge points added to the author's own understanding, if there are errors, please correct me, you can contact me Weibo!The TCP packet for

Directory: TCP Header Maximum message segment length Semi-closed State transition Diagram Incoming connection request queue 1.TCP Header TCP provides a connection-oriented, reliable byte-stream service. Connection-oriented means that two applications that use TCP (typically

at the same time, both of which have the same state transition diagram.8. Record time stampsThe timestamp options that are received by the Tcp_input processing are given below.If the received message segment has a timestamp, the timestamp value is saved in the variable.9.RST processingThe switch statement that handles the RST flag is given below, depending on the current connection state.1.SYN_RCVD state, the socket error code is set to econnrefused,

Tcp-ip detailed volume 3:TCP transaction protocol, HTTP, NNTP, and UNIX domain protocol "PDF" Download Link:https://u253469.pipipan.com/fs/253469-230062539Content IntroductionThe TCP. IP Detail (

the address of the remote host itself, the destination address is the IP address of the mobile host, in short, it is considered that the mobile host in the attribution network. In essence, it's the attribution agent. Using ARP proxy technology to use the attribution physical address to receive the data frame grouping on the link layer and then forward the packet to the field network where the mobile host resides.B. When sending information from a mob

state when the fin is processed, it means that both ends of the connection are closed simultaneously---the two fin sent at both ends is interleaved across the network. The connection enters the closing state. 4.fin_wait_2 status. Receiving fin will bring the connection into the TIME_WAIT state. When the Fin_wait_1 state receives a segment with an ACK and fin, although the connection is transferred directly from Fin_wait_1 to the TIME_WAIT state, the connection actually enters the fin_wait_2 sta

TCP needs to process two types of data at the same time: block data, interactive data.This chapter will take the Rlogin application as an example to observe the transfer process of interactive data.Interactive inputFirst, the flow of data generated by typing an interactive command on a rlogin connection (each typing an interactive key produces a data grouping), which results in 4 segments:1. Interactive key

a host or a simple routing algorithm for it. essentially the difference is that the host never forwards the datagram from one interface to another, while the router forwards the datagram. The host that contains the router function should never forward datagrams unless it is set to that.In a general system, IP can accept datagrams from tcp,udp,icmp and IGMP (i.e. locally generated datagrams) and send them,

和ip结构之间的关系。 图中含有大量的信息： 1.全部结构都放在一个mbuf的数据区内。 2.ipq链表由next和prev连接起来的ipq结构组成。每一个ipq结构保存了唯一标识一个IP数据报的四个字段。 3.当作为分片链表的头訪问时，每一个ipq结构被看成是一个ipasfrag结构。这些分片由ipf_next和ipf_prev链接起来，分别 覆盖了ipq结构的ipq_next和ipq_prev成员。 4.每一个ipasfrag结构都覆盖了到达分片的ip结构，与分片一起到达的数据在缓存中跟在该结构之后。 从逻辑的观点说明重装结构，该图显示了三个数据报的重装，以及ipq链表和ipasfrag结构之间的关系，阴影部分为缺少 的分片。

protocol is independent of the IP address, there is no network layer settings, only the physical layer and the link layer, initially only the hub, no switch router, the server between the transfer of data by MAC address. The MAC address is already in use before the IP address is available. The two-layer switch, which is now used everywhere, is to forward data based on the MAC address. The reason for th

The IP Input Function (ipintr) processes the options after verifying the Group format (check, length, etc.) and determining whether the group has reached the destination. This indicates that the Group Each vro encountered and the final target host process the option to be grouped. An IP group can contain optional fields that are processed before the group is forwarded or received.

1th Chapter the concept of TCP/IP TCP/IP refers to the set of network protocols used for the Internet and many other networks. TCP/IP Features: Ø logical addressing-the physical address (MAC address) is a unique and permanent ad

The TCP/IP detailed Volume 2 describes the TCP/IP stack source code for 4.4bsd-lite (a release of the BSD operating system released in 1994), which is followed by a number of implementations of the network protocol Stacks for UNIX and non-UNIX (including Linux) operating sys

. Pass the PRC_XXXX error code to the control input function of the protocol.The 3.internet PCB protocol (TCP and UDP) maps a prc_xxx error code to a UNIX errno value, which is returned to the process.8.udp_usrreq functionMany operations call the Protocol's user request function, and one of the five write functions is invoked on a UDP socket to call UDP on request Pru_sendEnd of the user request function. The individual requests in this function are d

address,How to communicate? ) 2) There is no Type field in the data frame, and if one line is used for slip it cannot use other protocols at the same time; 3) There is no check field in slip, and once transmitted packets are affected by line noise, errors can only be found through the upper layer protocol. because of the speed of the serial line of the foot, and communication is usually interactive, so there are many small TCP packets on the slip lin

The little Porter is here again, 51 holidays are over.1. Introduction Broadcast and multicast only apply to UDP because TCP is a connection-oriented protocol (IP address determination) Unicast: The Ethernet frame is only destined for a single destination host, and the destination address indicates a single receive interface. In this mode,