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/*
This file is part of libmicrohttpd
(C) 2007 Christian Grothoff
libmicrohttpd is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2, or (at your
option) any later version.
libmicrohttpd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with libmicrohttpd; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file https_echo_client.c
* @brief a simple echo client to use in conjuction with the echo TLS server.
* @author LV-426
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <gnutls/gnutls.h>
#define MAX_BUF 1024
#define SA struct sockaddr
#define MSG "GET / HTTP/1.0\r\n\r\n"
extern int tcp_connect (void);
extern void tcp_close (int sd);
int
main (int argc, char **argv)
{
int ret, sd, ii, err;
gnutls_session_t session;
char buffer[MAX_BUF + 1];
gnutls_anon_client_credentials_t anoncred;
struct sockaddr_in servaddr4;
const struct sockaddr *servaddr;
struct sockaddr_in sa;
socklen_t addrlen;
if (argc < 2)
{
printf ("Usage : %s SERVER-PORT\n", argv[0]);
return 1;
}
gnutls_global_init ();
gnutls_anon_allocate_client_credentials (&anoncred);
/* Initialize TLS session */
gnutls_init (&session, GNUTLS_CLIENT);
/* Use default priorities */
gnutls_priority_set_direct (session, "PERFORMANCE:+ANON-DH:!ARCFOUR-128",
NULL);
/* put the anonymous credentials to the current session */
gnutls_credentials_set (session, GNUTLS_CRD_ANON, anoncred);
sd = socket (AF_INET, SOCK_STREAM, 0);
memset (&sa, '\0', sizeof (sa));
sa.sin_family = AF_INET;
sa.sin_port = htons (atoi (argv[1]));
inet_pton (AF_INET, "127.0.0.1", &sa.sin_addr);
/* connect to the peer */
err = connect (sd, (struct sockaddr *) &sa, sizeof (sa));
if (err < 0)
{
fprintf (stderr, "Connect error\n");
exit (1);
}
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
/* Perform the TLS handshake */
ret = gnutls_handshake (session);
if (ret < 0)
{
fprintf (stderr, "*** Handshake failed\n");
gnutls_perror (ret);
goto end;
}
else
{
printf ("- Handshake was completed\n");
}
for (;;)
{
/**/ scanf ("%s", buffer);
if (strcmp (buffer, "exit") == 0)
{
gnutls_record_send (session, buffer, strlen (MSG));
break;
}
gnutls_record_send (session, buffer, strlen (MSG));
ret = gnutls_record_recv (session, buffer, MAX_BUF);
if (ret == 0)
{
printf ("- Peer has closed the TLS connection\n");
goto end;
}
else if (ret < 0)
{
fprintf (stderr, "*** Error: %s\n", gnutls_strerror (ret));
break;
}
printf ("- Received %d bytes: ", ret);
for (ii = 0; ii < ret; ii++)
{
fputc (buffer[ii], stdout);
}
fputs ("\n", stdout);
}
end:
shutdown (sd, SHUT_RDWR);
close (sd);
gnutls_deinit (session);
gnutls_anon_free_client_credentials (anoncred);
gnutls_global_deinit ();
return 0;
}
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