This code sets up a socket server that listens on...

December 8, 2023 at 01:40 AM

include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>
#include <sys/socket.h>

#define SA struct sockaddr

int listenfd, connfd;

void function(char *str) {
    char readbuf[256];
    char writebuf[256];
    strcpy(readbuf, str);
    sprintf(writebuf, "%s", readbuf);
    write(connfd, writebuf, strlen(writebuf));
}

int main(int argc, char *argv[]) {
    char line[1024];
    struct sockaddr_in servaddr;
    ssize_t n;
    
    listenfd = socket(AF_INET, SOCK_STREAM, 0);
    bzero(&servaddr, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servaddr.sin_port = htons(7776);
    
    bind(listenfd, (SA*)&servaddr, sizeof(servaddr));
    listen(listenfd, 1024);
    
    for (;;) {
        connfd = accept(listenfd, (SA*)NULL, NULL);
        write(connfd, ">", 2);
        n = read(connfd, line, sizeof(line) - 1);
        line[n] = 0;
        function(line);
        close(connfd);
    }

This code sets up a socket server that listens on port 7776. It accepts incoming connections, reads a line of input from the client, passes it to the function function, and then sends the result back to the client. The server continues to listen for new connections and repeat this process indefinitely.

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