serwer_lab2.c

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

int main(int argc, char* argv[]){
    socklen_t sl;
    int sfd, cfd, on = 1;
    struct sockaddr_in saddr, caddr;

    saddr.sin_family = AF_INET;
    saddr.sin_addr.s_addr = INADDR_ANY;
    saddr.sin_port = htons(1234);
    sfd = socket(PF_INET, SOCK_STREAM, 0);
    setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, (char*) &on, sizeof(on));
    bind(sfd, (struct sockaddr*)&saddr, sizeof(saddr));
    listen(sfd, 5);

    char request[7];
    while(1){
        sl = sizeof(caddr);
        cfd = accept(sfd, (struct sockaddr*) &caddr, &sl);

        printf("%s -- new connection from %s:%d\n",
               argv[0],
               inet_ntoa(caddr.sin_addr),
               ntohs(caddr.sin_port));

        read(cfd, request, 7);
        if (strcmp(request, "132296") == 0)
            write(cfd, "Adrianna Nowicka\n", 17);
        else if (strcmp(request, "132237") == 0)
            write(cfd, "Wojciech Handkiewicz\n", 21);
        else
            write (cfd, "Error.\n", sizeof("Error.\n"));
        close(cfd);

    }
    close(sfd);

 return 1;
}