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#include <config.h>
#include <Ecore.h>
#include <fcntl.h>
#include <netinet/tcp.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../utils.h"
#include <gnutls/gnutls.h>
/* Ecore_Fd_Handler example
* 2010 Mike Blumenkrantz
* compile with gcc $(pkgconfig --cflags --libs gnutls ecore)
*/
#define print(...) {fprintf(stderr, "line %i: ", __LINE__); fprintf(stderr, __VA_ARGS__); fprintf(stderr, "\n");}
static int done = 0;
#if 0
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "|<%d>| %s", level, str);
}
#endif
static const char
*SSL_GNUTLS_PRINT_HANDSHAKE_STATUS(gnutls_handshake_description_t
status)
{
switch (status) {
case GNUTLS_HANDSHAKE_HELLO_REQUEST:
return "Hello request";
case GNUTLS_HANDSHAKE_CLIENT_HELLO:
return "Client hello";
case GNUTLS_HANDSHAKE_SERVER_HELLO:
return "Server hello";
case GNUTLS_HANDSHAKE_CERTIFICATE_PKT:
return "Certificate packet";
case GNUTLS_HANDSHAKE_SERVER_KEY_EXCHANGE:
return "Server key exchange";
case GNUTLS_HANDSHAKE_CERTIFICATE_REQUEST:
return "Certificate request";
case GNUTLS_HANDSHAKE_SERVER_HELLO_DONE:
return "Server hello done";
case GNUTLS_HANDSHAKE_CERTIFICATE_VERIFY:
return "Certificate verify";
case GNUTLS_HANDSHAKE_CLIENT_KEY_EXCHANGE:
return "Client key exchange";
case GNUTLS_HANDSHAKE_FINISHED:
return "Finished";
case GNUTLS_HANDSHAKE_SUPPLEMENTAL:
return "Supplemental";
default:
return NULL;
}
return NULL;
}
/* Connects to the peer and returns a socket
* descriptor.
*/
static int tcp_connect(void)
{
const char *PORT = getenv("PORT");
const char *SERVER = "127.0.0.1"; //verisign.com
int err, sd;
int flag = 1, curstate = 0;
struct sockaddr_in sa;
/* sets some fd options such as nonblock */
sd = socket(AF_INET, SOCK_STREAM, 0);
fcntl(sd, F_SETFL, O_NONBLOCK);
fcntl(sd, F_SETFD, FD_CLOEXEC);
setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, (const void *) &curstate,
sizeof(curstate));
setsockopt(sd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag,
sizeof(int));
memset(&sa, '\0', sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_port = htons(atoi(PORT));
inet_pton(AF_INET, SERVER, &sa.sin_addr);
/* connects to server
*/
err = connect(sd, (struct sockaddr *) &sa, sizeof(sa));
if ((err < 0) && (errno != EINPROGRESS)) {
print("Connect error\n");
exit(1);
}
return sd;
}
/* closes the given socket descriptor.
*/
static void tcp_close(int sd)
{
shutdown(sd, SHUT_RDWR); /* no more receptions */
close(sd);
}
static Eina_Bool
_process_data(gnutls_session_t client, Ecore_Fd_Handler * fd_handler)
{
static int ret, lastret;
static unsigned int count = 0;
if (!done) {
lastret = ret;
ret = gnutls_handshake(client);
count++;
if (gnutls_record_get_direction(client))
ecore_main_fd_handler_active_set(fd_handler,
ECORE_FD_WRITE);
else
ecore_main_fd_handler_active_set(fd_handler,
ECORE_FD_READ);
/* avoid printing messages infinity times */
if (lastret != ret && ret != 0 && ret != GNUTLS_E_AGAIN) {
print("gnutls returned with: %s - %s",
gnutls_strerror_name(ret),
gnutls_strerror(ret));
if ((ret == GNUTLS_E_WARNING_ALERT_RECEIVED)
|| (ret == GNUTLS_E_FATAL_ALERT_RECEIVED))
print("Also received alert: %s",
gnutls_alert_get_name
(gnutls_alert_get(client)));
print("last out: %s",
SSL_GNUTLS_PRINT_HANDSHAKE_STATUS
(gnutls_handshake_get_last_out(client)));
print("last in: %s",
SSL_GNUTLS_PRINT_HANDSHAKE_STATUS
(gnutls_handshake_get_last_in(client)));
}
if (gnutls_error_is_fatal(ret)) {
print("yarrr this be an error!");
exit(1);
}
}
if (ret == GNUTLS_E_SUCCESS) {
done = 1;
//print("Handshake successful in %u handshake calls!", count);
ecore_main_loop_quit();
}
return ECORE_CALLBACK_RENEW;
}
int main(void)
{
/* credentials */
gnutls_anon_client_credentials_t c_anoncred;
gnutls_certificate_credentials_t c_certcred;
gnutls_session_t client;
int sd, i;
/* General init. */
global_init();
ecore_init();
// gnutls_global_set_log_function (tls_log_func);
// gnutls_global_set_log_level (6);
/* Init client */
gnutls_anon_allocate_client_credentials(&c_anoncred);
gnutls_certificate_allocate_credentials(&c_certcred);
for (i = 0; i < 5; i++) {
gnutls_init(&client, GNUTLS_CLIENT);
/* set very specific priorities */
gnutls_handshake_set_timeout(client, GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT);
gnutls_priority_set_direct(client, "NORMAL:+ANON-DH",
NULL);
gnutls_credentials_set(client, GNUTLS_CRD_ANON,
c_anoncred);
gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,
c_certcred);
gnutls_server_name_set(client, GNUTLS_NAME_DNS,
"localhost", strlen("localhost"));
/* connect to the peer
*/
sd = tcp_connect();
/* associate gnutls with socket */
gnutls_transport_set_int(client, sd);
/* add a callback for data being available for send/receive on socket */
if (!ecore_main_fd_handler_add
(sd, ECORE_FD_READ | ECORE_FD_WRITE,
(Ecore_Fd_Cb) _process_data, client, NULL, NULL)) {
print("could not create fd handler!");
exit(1);
}
/* begin main loop */
ecore_main_loop_begin();
gnutls_bye(client, GNUTLS_SHUT_RDWR);
gnutls_deinit(client);
tcp_close(sd);
}
gnutls_anon_free_client_credentials(c_anoncred);
gnutls_certificate_free_credentials(c_certcred);
return 0;
}
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