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/* assuan-socket-connect.c - Assuan socket based client
* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
*
* This file is part of Assuan.
*
* Assuan is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Assuan 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
#include <config.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#ifndef HAVE_W32_SYSTEM
#include <sys/socket.h>
#include <sys/un.h>
#else
#include <windows.h>
#endif
#include "assuan-defs.h"
/* Hacks for Slowaris. */
#ifndef PF_LOCAL
# ifdef PF_UNIX
# define PF_LOCAL PF_UNIX
# else
# define PF_LOCAL AF_UNIX
# endif
#endif
#ifndef AF_LOCAL
# define AF_LOCAL AF_UNIX
#endif
#ifndef SUN_LEN
# define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \
+ strlen ((ptr)->sun_path))
#endif
static int
do_finish (assuan_context_t ctx)
{
if (ctx->inbound.fd != -1)
{
_assuan_close (ctx->inbound.fd);
}
ctx->inbound.fd = -1;
ctx->outbound.fd = -1;
return 0;
}
static void
do_deinit (assuan_context_t ctx)
{
do_finish (ctx);
}
/* Make a connection to the Unix domain socket NAME and return a new
Assuan context in CTX. SERVER_PID is currently not used but may
become handy in the future. */
assuan_error_t
assuan_socket_connect (assuan_context_t *r_ctx,
const char *name, pid_t server_pid)
{
return assuan_socket_connect_ext (r_ctx, name, server_pid, 0);
}
/* Make a connection to the Unix domain socket NAME and return a new
Assuan context in CTX. SERVER_PID is currently not used but may
become handy in the future. With flags set to 1 sendmsg and
recvmesg are used. */
assuan_error_t
assuan_socket_connect_ext (assuan_context_t *r_ctx,
const char *name, pid_t server_pid,
unsigned int flags)
{
static struct assuan_io io = { _assuan_simple_read,
_assuan_simple_write };
assuan_error_t err;
assuan_context_t ctx;
int fd;
struct sockaddr_un srvr_addr;
size_t len;
const char *s;
if (!r_ctx || !name)
return _assuan_error (ASSUAN_Invalid_Value);
*r_ctx = NULL;
/* We require that the name starts with a slash, so that we
eventually can reuse this function for other socket types. To
make things easier we allow an optional dirver prefix. */
s = name;
if (*s && s[1] == ':')
s += 2;
if (*s != DIRSEP_C && *s != '/')
return _assuan_error (ASSUAN_Invalid_Value);
if (strlen (name)+1 >= sizeof srvr_addr.sun_path)
return _assuan_error (ASSUAN_Invalid_Value);
err = _assuan_new_context (&ctx);
if (err)
return err;
ctx->deinit_handler = ((flags&1))? _assuan_uds_deinit : do_deinit;
ctx->finish_handler = do_finish;
fd = _assuan_sock_new (PF_LOCAL, SOCK_STREAM, 0);
if (fd == -1)
{
_assuan_log_printf ("can't create socket: %s\n", strerror (errno));
_assuan_release_context (ctx);
return _assuan_error (ASSUAN_General_Error);
}
memset (&srvr_addr, 0, sizeof srvr_addr);
srvr_addr.sun_family = AF_LOCAL;
strncpy (srvr_addr.sun_path, name, sizeof (srvr_addr.sun_path) - 1);
srvr_addr.sun_path[sizeof (srvr_addr.sun_path) - 1] = 0;
len = SUN_LEN (&srvr_addr);
if (_assuan_sock_connect (fd, (struct sockaddr *) &srvr_addr, len) == -1)
{
_assuan_log_printf ("can't connect to `%s': %s\n",
name, strerror (errno));
_assuan_release_context (ctx);
_assuan_close (fd);
return _assuan_error (ASSUAN_Connect_Failed);
}
ctx->inbound.fd = fd;
ctx->outbound.fd = fd;
ctx->io = &io;
if ((flags&1))
_assuan_init_uds_io (ctx);
/* initial handshake */
{
int okay, off;
err = _assuan_read_from_server (ctx, &okay, &off);
if (err)
_assuan_log_printf ("can't connect to server: %s\n",
assuan_strerror (err));
else if (okay != 1)
{
/*LOG ("can't connect to server: `");*/
_assuan_log_sanitized_string (ctx->inbound.line);
fprintf (assuan_get_assuan_log_stream (), "'\n");
err = _assuan_error (ASSUAN_Connect_Failed);
}
}
if (err)
{
assuan_disconnect (ctx);
}
else
*r_ctx = ctx;
return 0;
}
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