TestSuma

//-----------CLIENT-----------

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

int main(int argc, char* argvs[]){
  int c;
  struct sockaddr_in server;
  char ip[20];
  strcpy(ip,argvs[1]);
  int port = atoi(argvs[2]);

  c = socket(AF_INET, SOCK_STREAM, 0);
  if(c<0){
    printf("Eroare socket client!\n");
    return 1;
  }

  memset(&server, 0 ,sizeof(server));
  server.sin_port = htons(port);
  server.sin_family = AF_INET;
  server.sin_addr.s_addr = inet_addr(ip);

  if (connect(c, (struct sockaddr *) &server, sizeof(server)) < 0) {
    printf("Eroare conectarea la server!\n");
    return 1;
  }
  int a,b;
  int suma;
  printf("Introduceti numerele: " );
  scanf("%d",&a);
  send(c,&a,sizeof(a),0);
  recv(c,&suma,sizeof(suma),0);
  printf("%d\n",suma );

  close(c);
}

//-----------SERVER-----------
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char* argvs[]){
    int s,c,l;
    int suma = 0;
    int p[2]; pipe(p);
    struct sockaddr_in server, client;
    int port = atoi(argvs[1]);

    s = socket(AF_INET, SOCK_STREAM, 0);
    if(s<0){
        printf("Eroare socket server!\n");
        return 1;
    }

    memset(&server, 0, sizeof(server));
    server.sin_port = htons(port);
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = INADDR_ANY;

    if(bind(s,(struct sockaddr *) &server ,sizeof(server))<0){
        printf("Eroare la bind!\n");
        return 1;
    }

    listen(s,5);

    l = sizeof(client);
    memset(&client,0,sizeof(client));
    while(1){
        c=accept(s,(struct sockaddr *) &client, &l);
        printf("S-a conectat un client\n");
        if(fork()==0){

            int a;
            recv(c,&a,sizeof(a),MSG_WAITALL);
            suma+=a;
            send(c,&suma,sizeof(suma),0);
            write(p[1],&suma,sizeof(int));
            close(p[0]);close(p[1]);
            close(c);
            return 0;
        }
        read(p[0],&suma,sizeof(int));
        if(suma == 0){
            close(p[0]);close(p[1]);
            break;
        }
    }
    return 0;
}