Use it for interaction between client and server. Return information of client socket description. Put null here if second parameter is null Put null here if there is no special request to specify address. Last, connect function acts as the person who wants to carry out some work with the server. Accept function acts as the person who is asking the traffic waiting inside the waiting room to be ready for the meeting between server. Listen function acts as a waiting room, asking the traffic wait on the waiting room. It is exactly the same as what is happening in the server. So, what happens if there are 2 or more people that come at one time? The answer is simple, lining up and wait for the front people to finish using with ATM. Imagine that server looks like an ATM, and only one person can be used the ATM. From what flow chart shows, listen, accept, connect, three functions play very important roles. Server and client will start interacting with each other after the bind function and it is the most important session. If your domain is AF_UNIX, try and put struct sockaddr_un here. Put struct sockaddr_in into it as domain is AF_INET.
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Put socket description retrieved on the top bind function server_socket & client_socket As flow chart, bind function must be declared on both server and client. Because every process on the flow chart is needed and it acts as a very important role on network connection.Īfter all setup on struct sockaddr_in is done, declare bind function. The flow chart might look complicated but make sure you don’t lose your patience due to the following flow chart. The flow chart below shows the interaction between client and server. On client side, serv_addr.sin_port = htons(127.0.0.1) is declared in order to listen to the internal network. Inside red bracket, you will find 0.0.0.0:5000 and Socket-server, it means port 5000 is used and listen to any valid incoming address. Things that need to be initialized are listed as follows:Īt the beginning, a socket function needs to be declared to get the socket descriptor. Imagine a socket as a seaport that allows a ship to unload and gather shipping, whereas socket is the place where a computer gathers and puts data into the internet. It is because server is a kind of software. If you are experienced with constructing a server, you might find out that a server can be built on a home computer by installing a server OS. To be more precise, the server and client are two different processes with different jobs.
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#How to c programming on mac software
It means what is happening on the top is there are two different software executed.
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The answer is the server and client both are software but not hardware. Why Both Server and Client on the Same Computer?
#How to c programming on mac code
Otherwise, do some checking on your development environment or try to run some simple code for instance hello world. If you see the message above, congratulations, you have success with your first step to networking programming. When you execute Socket-cli, I guess you will get the following result: It means, you need to open two terminals to run each of the outputs. Socket-server must be executed first, then execute Socket-client.out and never try to break Socket-server forever loop. Attention here, never mess up with the order of executing Socket-server.out and Socket-client. If((sockfd = socket(AF_INET, SOCK_STREAM, 0)) 0)Īfter debugging both source files, run Socket-server.out, then run Socket-client. Memset(recvBuff, ' 0', sizeof(recvBuff))