tcp

How to decode the TCP buffer data

由 旧巷老猫 提交于 2021-01-24 12:10:51
问题 I am trying to write a tcp server to get the data from Heacent 908 GPS tracker. After establishing the connection from the tracker I am getting the following buffer output. <Buffer 78 78 0d 01 03 87 11 31 20 86 48 42 00 06 64 be 0d 0a> <Buffer 78 78 0d 01 03 87 11 31 20 86 48 42 00 06 64 be 0d 0a> <Buffer 78 78 0d 01 03 87 11 31 20 86 48 42 00 06 64 be 0d 0a> <Buffer 78 78 0d 01 03 87 11 31 20 86 48 42 00 06 64 be 0d 0a> <Buffer 78 78 0d 01 03 87 11 31 20 86 48 42 00 06 64 be 0d 0a> <Buffer

How does a TCP packet arrive when using the Socket api in C#

由 南笙酒味 提交于 2021-01-24 10:52:47
问题 I have been reading about TCP packet and how they can be split up any number of times during their voyage. I took this to assume I would have to implement some kind of buffer on top of the buffer used for the actual network traffic in order to store each ReceiveAsync() until enough data is available to parse a message. BTW, I am sending length-prefixed, protobuf-serialized messages over TCP. Then I read that the lower layers (ethernet?, IP?) will actually re-assemble packets transparently. My

Create a virtual serial port connection over TCP

由 邮差的信 提交于 2021-01-20 15:33:39
问题 I am developing an application that should be able to write to a virtual serial port and receive data through the same port from remote clients over network. The application runs on a linux server. I am new in using serial ports and I have some questions on this topic. Clients The client can establish a TCP connection to a server. When we setup a client, we have to provide the IP address of the server, a tcp port (usually 8080) and a virtual com port. The client then will automatically try to

Create a virtual serial port connection over TCP

由 梦想与她 提交于 2021-01-20 15:32:28
问题 I am developing an application that should be able to write to a virtual serial port and receive data through the same port from remote clients over network. The application runs on a linux server. I am new in using serial ports and I have some questions on this topic. Clients The client can establish a TCP connection to a server. When we setup a client, we have to provide the IP address of the server, a tcp port (usually 8080) and a virtual com port. The client then will automatically try to

Create a virtual serial port connection over TCP

由 北城以北 提交于 2021-01-20 15:32:11
问题 I am developing an application that should be able to write to a virtual serial port and receive data through the same port from remote clients over network. The application runs on a linux server. I am new in using serial ports and I have some questions on this topic. Clients The client can establish a TCP connection to a server. When we setup a client, we have to provide the IP address of the server, a tcp port (usually 8080) and a virtual com port. The client then will automatically try to

Data transfer over sockets[TCP] how to pack multiple integer in c/c++ and transfer the data with send() recv()?

由 佐手、 提交于 2021-01-20 08:41:19
问题 I'm making a small client/server based game, on linux in c/c++ and I need to send the player turn to the server. Here is my problem. I want to send two integers to the server and sometimes it works perfectly, but sometimes the server receives both integer in the first recv() and its stuck. I know that the best way is to package the messages. The problem is I don't know how the syntax should look like. In theory--> the player input would be like an int column = 4 and a second int row = 1 and I

Data transfer over sockets[TCP] how to pack multiple integer in c/c++ and transfer the data with send() recv()?

由 女生的网名这么多〃 提交于 2021-01-20 08:39:43
问题 I'm making a small client/server based game, on linux in c/c++ and I need to send the player turn to the server. Here is my problem. I want to send two integers to the server and sometimes it works perfectly, but sometimes the server receives both integer in the first recv() and its stuck. I know that the best way is to package the messages. The problem is I don't know how the syntax should look like. In theory--> the player input would be like an int column = 4 and a second int row = 1 and I

技术往事：改变世界的TCP/IP协议（珍贵多图、手机慎点）

由 依然范特西╮ 提交于 2021-01-09 02:59:07
1、前言 作为应用层开发人员，接触最多的网络协议通常都是传输层的TCP（与之同处一层的另一个重要协议是UDP协议），但对于IP协议，对于应用程序员来说更多的印象还是IP地址这个东西，再往深一点也就很难说的清楚。 本文将简要回故TCP/IP协议的过去、简单介绍TCP/IP协议族的关系，并与大家一起直观地分享由TCP/IP协议族所构建的虚拟网络与真实世界的“连接”情况。 2、TCP/IP协议简介 互联网协议族（英语：Internet Protocol Suite，缩写为IPS），是一个网络通信模型，以及一整个网络传输协议家族，为互联网的基础通信架构。它常被通称为TCP/IP协议族（英语：TCP/IP Protocol Suite，或TCP/IP Protocols），简称TCP/IP协议。因为这个协议家族的两个核心协议，包括TCP（传输控制协议）和IP（网际协议），为这个家族中最早通过的标准。 对于应用层开发人员，接触最多的网络协议通常都是传输层的TCP，为什么这么说，因为再往上的应用层协议，如：HTTP、HTTPS、POP3、SMTP、RPC、FTP、TELNET等等都是基于TCP传输层协议。但对于IP协议，对于应用程序员来说更多的印象还是IP地址这个东西，实际上IP协议是位于TCP协议之下的网络层，对于应用层程序员来说很难直接接触。 下面这张图，直接的反映了TCP

How to assign incoming packet's source port to outgoing packet destination port — TCP C Linux

由 感情迁移 提交于 2021-01-07 03:10:17
问题 I like to know the source port of packet in tcphdr can be assigned to destination port of ip like this source_ip_tcph->source= dest_ip_tcph->dest; source_ip_tcph->dest = dest_ip_tcph->source; above are source and destination (pointer to memory) of tcphdr type I am trying to create a server everytime I respond to client from server the destination port is different. I assigned it like above Edit Above I am using raw sockets. trying to make raw socket based tcp implementation as a server 来源：

How to assign incoming packet's source port to outgoing packet destination port — TCP C Linux

由 流过昼夜 提交于 2021-01-07 03:09:19
问题 I like to know the source port of packet in tcphdr can be assigned to destination port of ip like this source_ip_tcph->source= dest_ip_tcph->dest; source_ip_tcph->dest = dest_ip_tcph->source; above are source and destination (pointer to memory) of tcphdr type I am trying to create a server everytime I respond to client from server the destination port is different. I assigned it like above Edit Above I am using raw sockets. trying to make raw socket based tcp implementation as a server 来源：
订阅 tcp