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/*
* Copyright (C) 2000 Manoj Kasichainula <manoj@io.com>
* Copyright (C) 2001,2005 Brendan Cully <brendan@kublai.com>
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "mutt.h"
#include "mutt_socket.h"
#include "mutt_tunnel.h"
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <errno.h>
/* -- data types -- */
typedef struct
{
pid_t pid;
int readfd;
int writefd;
} TUNNEL_DATA;
/* forward declarations */
static int tunnel_socket_open (CONNECTION*);
static int tunnel_socket_close (CONNECTION*);
static int tunnel_socket_read (CONNECTION* conn, char* buf, size_t len);
static int tunnel_socket_write (CONNECTION* conn, const char* buf, size_t len);
static int tunnel_socket_poll (CONNECTION* conn);
/* -- public functions -- */
int mutt_tunnel_socket_setup (CONNECTION *conn)
{
conn->conn_open = tunnel_socket_open;
conn->conn_close = tunnel_socket_close;
conn->conn_read = tunnel_socket_read;
conn->conn_write = tunnel_socket_write;
conn->conn_poll = tunnel_socket_poll;
return 0;
}
static int tunnel_socket_open (CONNECTION *conn)
{
TUNNEL_DATA* tunnel;
int pid;
int rc;
int pin[2], pout[2];
int devnull;
tunnel = (TUNNEL_DATA*) safe_malloc (sizeof (TUNNEL_DATA));
conn->sockdata = tunnel;
mutt_message (_("Connecting with \"%s\"..."), Tunnel);
if ((rc = pipe (pin)) == -1)
{
mutt_perror ("pipe");
FREE (&conn->sockdata);
return -1;
}
if ((rc = pipe (pout)) == -1)
{
mutt_perror ("pipe");
close (pin[0]);
close (pin[1]);
FREE (&conn->sockdata);
return -1;
}
mutt_block_signals_system ();
if ((pid = fork ()) == 0)
{
mutt_unblock_signals_system (0);
devnull = open ("/dev/null", O_RDWR);
if (devnull < 0 ||
dup2 (pout[0], STDIN_FILENO) < 0 ||
dup2 (pin[1], STDOUT_FILENO) < 0 ||
dup2 (devnull, STDERR_FILENO) < 0)
_exit (127);
close (pin[0]);
close (pin[1]);
close (pout[0]);
close (pout[1]);
close (devnull);
/* Don't let the subprocess think it can use the controlling tty */
setsid ();
execl (EXECSHELL, "sh", "-c", Tunnel, NULL);
_exit (127);
}
mutt_unblock_signals_system (1);
if (pid == -1)
{
mutt_perror ("fork");
close (pin[0]);
close (pin[1]);
close (pout[0]);
close (pout[1]);
FREE (&conn->sockdata);
return -1;
}
if (close (pin[1]) < 0 || close (pout[0]) < 0)
mutt_perror ("close");
fcntl (pin[0], F_SETFD, FD_CLOEXEC);
fcntl (pout[1], F_SETFD, FD_CLOEXEC);
tunnel->readfd = pin[0];
tunnel->writefd = pout[1];
tunnel->pid = pid;
conn->fd = 42; /* stupid hack */
return 0;
}
static int tunnel_socket_close (CONNECTION* conn)
{
TUNNEL_DATA* tunnel = (TUNNEL_DATA*) conn->sockdata;
int status;
close (tunnel->readfd);
close (tunnel->writefd);
waitpid (tunnel->pid, &status, 0);
if (!WIFEXITED(status) || WEXITSTATUS(status))
{
mutt_error(_("Tunnel to %s returned error %d (%s)"), conn->account.host,
WEXITSTATUS(status),
NONULL(mutt_strsysexit(WEXITSTATUS(status))));
mutt_sleep (2);
}
FREE (&conn->sockdata);
return 0;
}
static int tunnel_socket_read (CONNECTION* conn, char* buf, size_t len)
{
TUNNEL_DATA* tunnel = (TUNNEL_DATA*) conn->sockdata;
int rc;
rc = read (tunnel->readfd, buf, len);
if (rc == -1)
{
mutt_error (_("Tunnel error talking to %s: %s"), conn->account.host,
strerror (errno));
mutt_sleep (1);
}
return rc;
}
static int tunnel_socket_write (CONNECTION* conn, const char* buf, size_t len)
{
TUNNEL_DATA* tunnel = (TUNNEL_DATA*) conn->sockdata;
int rc;
rc = write (tunnel->writefd, buf, len);
if (rc == -1)
{
mutt_error (_("Tunnel error talking to %s: %s"), conn->account.host,
strerror (errno));
mutt_sleep (1);
}
return rc;
}
static int tunnel_socket_poll (CONNECTION* conn)
{
TUNNEL_DATA* tunnel = (TUNNEL_DATA*) conn->sockdata;
int ofd;
int rc;
ofd = conn->fd;
conn->fd = tunnel->readfd;
rc = raw_socket_poll (conn);
conn->fd = ofd;
return rc;
}
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