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| #include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include "client.h"
void clean(char *chain){
int *p= NULL;
p=strchr(chain, '\n'); // on cherche la caractère 'entrée'
if(p != NULL)// si il existe
*p=0;//on le supprime
else
purge();// on vide le buffer
}
void purge(){
long c;
while( (c=getchar())!='\n' && c!=EOF){
} //fonction qui permet de vider le buffer en cas de dépassement mémoire
}
void client(char *address, char *pseudo)
{
SOCKADDR_IN sin = { 0 };
int sock = initialisation(address, &sin);
char buffer[BUFFER];
fd_set rdfs;
sending(sock, &sin, pseudo);
testMode(sock, &sin);
// chat app
int running = 0;
while(running)
{
FD_ZERO(&rdfs);
//add keyboard as entry
FD_SET(STDIN_FILENO, &rdfs);
//adding the socket
FD_SET(sock, &rdfs);
if (select(sock + 1, &rdfs, NULL, NULL, NULL) == -1)
{
perror("function select()");
exit(errno);
}
if(FD_ISSET(STDIN_FILENO, &rdfs))
{
fgets(buffer, BUFFER - 1, stdin);
{
clean(buffer);
if(strcmp(buffer, "exit") == 0)
running = 0;
}
sending(sock, &sin, buffer);
}
else if (FD_ISSET(sock, &rdfs))
{
int n = reading(sock, &sin, buffer);
if (n == 0)
{
printf("server disconnected");
running = 0;
}
puts(buffer);
}
}
closesocket(sock);
}
int initialisation(char *address, SOCKADDR_IN *sin)
{
int sock = socket(AF_INET, SOCK_DGRAM, 0);
struct hostent *hostinfo;
if(sock == INVALID_SOCKET)
{
perror("socket()");
exit(errno);
}
hostinfo = gethostbyname(address);
if (hostinfo == NULL)
{
fprintf (stderr, "Unknown host %s.\n", address);
exit(EXIT_FAILURE);
}
sin->sin_addr = *(IN_ADDR *) hostinfo->h_addr;
sin->sin_port = htons(PORT);
sin->sin_family = AF_INET;
return sock;
}
int reading(int sock, SOCKADDR_IN *sin, char *buffer)
{
int n = 0;
size_t sinsize = sizeof *sin;
if((n = recvfrom(sock, buffer, BUFFER - 1, 0, (SOCKADDR *) sin, &sinsize)) < 0)
{
perror("function recvfrom()");
exit(errno);
}
buffer[n] = 0;
return n;
}
void sending(int sock, SOCKADDR_IN *sin, char *buffer)
{
if(sendto(sock, buffer, strlen(buffer), 0, (SOCKADDR *) sin, sizeof *sin) < 0)
{
perror("function sendto()");
exit(errno);
}
}
void testMode(int sock, SOCKADDR_IN *sin)
{
time_t start,end;
double dif;
time (&start);
char *message;
message = malloc(31740 * sizeof(char));
for(int i = 0; i < 31740 ; i ++)
message[i] = 'a';
for(int j = 0 ; j < 1000 ; j ++)
{
if(sendto(sock, message, strlen(message), 0, (SOCKADDR *) sin, sizeof *sin) < 0)
{
perror("function sendto()");
exit(errno);
}
printf("%d\n", (j + 1));
}
time (&end);
dif = difftime (end,start);
printf ("\nIt took you %.7lf seconds\n", dif );
}
int main(int argc, char **argv)
{
if(argc < 2)
{
printf("Usage : %s [address] [pseudo]\n", argv[0]);
return EXIT_FAILURE;
}
for(int i = 0; (i + 1) < strlen(argv[1]) ; i ++)
{
argv[1][i] = argv[1][i+1];
}
argv[1][strlen(argv[1]) - 2] = '\0';
client(argv[1], argv[2]);
return EXIT_SUCCESS;
} |
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