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/*
* Copyright (C) 2001 Sebastian Krahmer.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Sebastian Krahmer.
* 4. The name Sebastian Krahmer may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "misc.h"
#include "session.h"
#include "forward.h"
#include <stdio.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <openssl/err.h>
#define SSL_LOG "./mim"
using namespace NS_Misc;
int ssl_forward(CSession *client, SSession *server)
{
size_t r;
fd_set rset;
char buf[1500];
int max;
char cfile[1024], sfile[1024];
sprintf(cfile, "%s.%ld.%d.client", SSL_LOG, time(NULL), getpid());
sprintf(sfile, "%s.%ld.%d.server", SSL_LOG, time(NULL), getpid());
int cfd = open(cfile, O_WRONLY|O_CREAT|O_APPEND, 0600);
int sfd = open(sfile, O_WRONLY|O_CREAT|O_APPEND, 0600);
if (cfd < 0 || sfd < 0) {
log("ssl_forward::open() returned error");
die(NULL);
}
// I know that there exists problems with SSL+select
// ...
for (;;) {
FD_ZERO(&rset);
FD_SET(client->fileno(), &rset);
FD_SET(server->fileno(), &rset);
max = (client->fileno() > server->fileno() ?
client->fileno() : server->fileno());
if (select(max + 1, &rset, NULL, NULL, NULL) < 0) {
if (errno == EINTR)
continue;
else {
log("ssl_forward::select");
die(NULL);
}
}
if (FD_ISSET(client->fileno(), &rset)) {
r = client->read(buf, sizeof(buf));
if (r <= 0)
break;
write(cfd, buf, r);
if (server->write(buf, r) <= 0)
break;
}
if (FD_ISSET(server->fileno(), &rset)) {
r = server->read(buf, sizeof(buf));
if (r <= 0)
break;
write(sfd, buf, r);
if (client->write(buf, r) <= 0)
break;
}
}
close(cfd);
close(sfd);
return 0; // upon return here, caller
// will shutdown connections
}
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