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Old stuff/ecole_etude_fac_de_pau/licence_3/systeme-distribues/tp3/serveur.c

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


#define TAILLEBUF 20


typedef struct {
  int op;
  int a;
  int b;
} op;






int main(int argc, char** argv) {

  int default_port = 4000;
  int i;
  if (argc>1) { 
    default_port = 0;
    for (i=0; i<strlen(argv[1]);i++)
      {
	default_port = default_port*10 + (int)argv[1][i] - 48;
      }
    //    default_port = argv[1]; 
  }
  printf("au final port = %d\n",default_port);

static struct sockaddr_in addr_client;
static struct sockaddr_in addr_serveur;
struct hostent *host_client;
socklen_t lg;
int sock,socket_ecoute,socket_service;

char reponse[10];
char buffer[TAILLEBUF];
char *chaine;
int nb_octets;

socket_ecoute = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1) {      perror("erreur création socket");      exit(1); }

bzero((char*)&addr_serveur, sizeof(addr_serveur));

addr_serveur.sin_family = AF_INET;
addr_serveur.sin_port = htons(default_port);
addr_serveur.sin_addr.s_addr=htonl(INADDR_ANY);



     if( bind(socket_ecoute, (struct sockaddr*)&addr_serveur,sizeof(addr_serveur))== -1 ) {
       perror("erreur bind");          exit(1); }

     
     lg = sizeof(struct sockaddr_in);
     
     if (listen(socket_ecoute, 5) == -1) {
       perror("erreur listen");
       exit(-1);

     }

     pid_t pid;

     while(1)
       {
     socket_service = accept(socket_ecoute, (struct sockaddr*)&addr_client, &lg);
     if (socket_service == -1) {
       perror("socket service");
       exit(-1);
     }

     pid = fork();
     if (pid ==  -1) { perror("error fork"); exit(-1); }
     if (pid == 0) { 
     op o;
     int resultat=1;
     
     
     nb_octets = read(socket_service, &o, sizeof(op));
     printf("Recu l operation %d %d %d \n",o.op,o.a,o.b);
     
     switch(o.op)
       {
       case 1:  
	 for(i=1;i<=o.a;i++) { resultat *= i; }
	 break;
       case 2:
	 while (o.b>0){resultat *= o.a;
	 o.b--;}
	 break;
	 
       }
     printf("Envoie de %d\n",resultat);
     
     write(socket_service,&resultat, sizeof(int));
     exit(1);
     }
   }
 close(socket_service);
 close(socket_ecoute);



}