SumaA2NumereNeconcurenta

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

// Un client trimite unui server doua numere.
// Serverul va returna clientului suma celor doua numere.

#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,l;
  struct sockaddr_in server;
  uint16_t a, b, r, suma = 0;
  char ip[20];
  strcpy(ip,argvs[1]);
  int port = atoi(argvs[2]);

  //VERIFICARI-------------------
  if(port<1024 || port>65535){
    printf("Portul nu convine!\n");
    return 1;
  }
  char verif[]="0123456789.";
  int i=0;
  for(i=0;i<strlen(ip);i++){
    if(strchr(verif,ip[i])==0){
      printf("Ip-ul nu convine!\n");
      return 1; //eroare
    }
  }
  //VERIFICARI------------------

  c = socket(AF_INET, SOCK_DGRAM, 0);
  if (c < 0) {
    printf("Eroare la crearea socketului 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);


  scanf("%hu",&a); a=htons(a);
  sendto(c, &a, sizeof(a), 0, (struct sockaddr *) &server, sizeof(server));
  l = sizeof(server);

  scanf("%hu",&b);b=htons(b);
  sendto(c, &b, sizeof(b), 0, (struct sockaddr *) &server, sizeof(server));

  recvfrom(c, &suma, sizeof(suma), MSG_WAITALL, (struct sockaddr *) &server, &l);
  suma=ntohs(suma);
  printf("Suma este: %hu\n",suma);
  close(c);
}

//---------------------------------------------- SERVER ----------------------------------------------

// Un client trimite unui server doua numere.
// Serverul va returna clientului suma celor doua numere.

#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>
#include <netinet/in.h>
#include <arpa/inet.h>

void deservire_client(int s,struct sockaddr_in client){

}

int main(int argc, char* argvs[]) {
  int s;
  struct sockaddr_in server, client;
  int l;

  s = socket(AF_INET, SOCK_DGRAM, 0);
  //VERIFICARE --------
  int port = atoi(argvs[1]);
  if(port<1024 || port>65535){
        printf("Portul nu convine!\n");
        return 1;
    }
  //VERIFICARE --------

  if (s < 0) {
    printf("Eroare la crearea socketului 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;
  }
  while(1){
    l = sizeof(client);
    memset(&client, 0, sizeof(client));
    uint16_t a,b,suma;
    int l = sizeof(client);
    recvfrom(s, &a, sizeof(a), MSG_WAITALL, (struct sockaddr *) &client, &l);
    a=ntohs(a);
    recvfrom(s, &b, sizeof(b), MSG_WAITALL, (struct sockaddr *) &client, &l);
    b=ntohs(b);
    suma = a + b; suma=htons(suma);

    sendto(s, &suma, sizeof(suma), 0, (struct sockaddr *) &client, sizeof(client));
  }
  close(s);
  return 0;
}