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| #include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h> /* close */
#include <netdb.h> /* gethostbyname */
#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define closesocket(s) close(s)
typedef int SOCKET;
typedef struct sockaddr_in SOCKADDR_IN;
typedef struct sockaddr SOCKADDR;
typedef struct in_addr IN_ADDR;
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include "parser.h"
#define bool char;
static void remove_client(SOCKET* hosts, int to_rem, int *now);
static int init_client(const char *address, int port)
{
SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
SOCKADDR_IN sin = { 0 };
struct hostent *hostinfo;
if(sock == INVALID_SOCKET)
{
perror("socket()");
close(sock);
return 0;
}
hostinfo = gethostbyname(address);
if (hostinfo == NULL)
{
fprintf (stderr, "Unknown host %s.\n", address);
close(sock);
return 0;
}
sin.sin_addr = *(IN_ADDR *) hostinfo->h_addr;
sin.sin_port = htons(port);
sin.sin_family = AF_INET;
if(connect(sock,(SOCKADDR *) &sin, sizeof(SOCKADDR)) == SOCKET_ERROR)
{
close(sock);
perror("connect()");
return 0;
}
return sock;
}
static int init_serveurs(int port)
{
SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
SOCKADDR_IN sin = { 0 };
if(sock == INVALID_SOCKET)
{
perror("socket()");
}
sin.sin_addr.s_addr = htonl(INADDR_ANY);
sin.sin_port = htons(port);
sin.sin_family = AF_INET;
if(bind(sock,(SOCKADDR *) &sin, sizeof sin) == SOCKET_ERROR)
{
perror("bind()");
exit(errno);
}
if(listen(sock, 2) == SOCKET_ERROR)
{
perror("listen()");
exit(errno);
}
return sock;
}
static int read_client(SOCKET sock, char *buffer)
{
int n = 0;
if((n = recv(sock, buffer, 100, 0)) < 0)
{
perror("recv()");
/* if recv error we disonnect the client */
n = 0;
}
buffer[n] = 0;
return n;
}
static void send_to(SOCKET* hosts, int nb, char* buf, int c)
{
if (nb == 0)
return;
if (nb == 1)
{
send(hosts[0], buf, c, 0);
return;
}
if (nb == 2)
{
send(hosts[0], buf, c, 0);
send(hosts[1], buf, c, 0);
}
}
int main(int argc, char **argv)
{
SOCKET client;
SOCKET serveur;
SOCKET hosts[2];
int nbconnected = 0;
char buffer[200];
int max;
fd_set rdfs;
int port_ser;
int port_cli;
if(argc != 2)
{
fprintf(stdout, "Bad number of args (xml file to parse)\n");
exit(0);
}
Parser p(argv[1]);
if(p.Get_port_serveur() < 1 || p.Get_port_client() < 1)
{
fprintf(stderr,"Bad port number, server: %i, server: %i\n", p.Get_port_serveur() , p.Get_port_client());
exit(0);
}
fprintf(stderr, "%i, %i\n" , p.Get_port_serveur() , p.Get_port_client());
while( (client = init_client(p.Get_host_serveur().c_str(),p.Get_port_serveur())) == 0)sleep(5);
serveur = init_serveurs(p.Get_port_client());
max = serveur>client?serveur:client;
while(1)
{
int i= 0;
FD_ZERO(&rdfs);
printf("top");
FD_SET(serveur, &rdfs);
FD_SET(client, &rdfs);
if(nbconnected == 1)FD_SET(hosts[0], &rdfs);
if(nbconnected == 2)
{
FD_SET(hosts[0], &rdfs);
FD_SET(hosts[1], &rdfs);
}
if(select(max+1, &rdfs, NULL, NULL,NULL) == -1)
{
perror("select()");
}
if(FD_ISSET(serveur, &rdfs))
{
SOCKADDR_IN csin = {0};
size_t sinsize = sizeof csin;
SOCKET csock = accept(serveur, (SOCKADDR*) &csin, &sinsize);
if(csock == SOCKET_ERROR)
{
perror("accept()");
continue;
}
max = csock > max ? csock:max;
FD_SET(csock, &rdfs);
hosts[nbconnected] = csock;
nbconnected ++;
}
if(FD_ISSET(client, &rdfs))
{
int c = read_client(client, buffer);
if(c == 0)
{
closesocket(client);
client = 0;
while(client == 0)
{
client = init_client(p.Get_host_serveur().c_str(), p.Get_port_serveur() );
sleep(5);
}
}
send_to(hosts,nbconnected,buffer, c);
}
for(i=0; i < nbconnected; i++)
{
if( FD_ISSET(hosts[i], &rdfs) )
{
int c = read_client(hosts[i], buffer);
if (c == 0)
{
closesocket(hosts[i]);
remove_client(hosts, i, &nbconnected);
}
send_to(&client, 1, buffer, c);
}
}
}
}
static void remove_client(SOCKET* hosts, int to_rem, int *now)
{
if(to_rem ==1)
{
(*now)--;
}
if(to_rem == 0)
{
hosts[0]=hosts[1];
(*now)--;
}
return;
} |
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