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assuan-socket-connect.c
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/* assuan-socket-connect.c - Assuan socket based client
* Copyright (C) 2002 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG 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.
*
* GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include "assuan-defs.h"
#ifdef HAVE_JNLIB_LOGGING
#include "../jnlib/logging.h"
#define LOGERROR(a) log_error ((a))
#define LOGERROR1(a,b) log_error ((a), (b))
#define LOGERROR2(a,b,c) log_error ((a), (b), (c))
#define LOGERRORX(a) log_printf ((a))
#else
#define LOGERROR(a) fprintf (stderr, (a))
#define LOGERROR1(a,b) fprintf (stderr, (a), (b))
#define LOGERROR2(a,b,c) fprintf (stderr, (a), (b), (c))
#define LOGERRORX(a) fputs ((a), stderr)
#endif
static int
do_finish (ASSUAN_CONTEXT ctx)
{
if (ctx->inbound.fd != -1)
{
close (ctx->inbound.fd);
}
ctx->inbound.fd = -1;
ctx->outbound.fd = -1;
return 0;
}
static void
do_deinit (ASSUAN_CONTEXT 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
becode handy in future. */
AssuanError
assuan_socket_connect (ASSUAN_CONTEXT *r_ctx,
const char *name, pid_t server_pid)
{
AssuanError err;
ASSUAN_CONTEXT ctx;
int fd;
struct sockaddr_un srvr_addr;
size_t len;
if (!r_ctx || !name)
return ASSUAN_Invalid_Value;
*r_ctx = NULL;
/* we require that the name starts with a slash, so that we can
alter reuse this function for other socket types */
if (*name != '/')
return ASSUAN_Invalid_Value;
if (strlen (name)+1 >= sizeof srvr_addr.sun_path)
return ASSUAN_Invalid_Value;
err = _assuan_new_context (&ctx);
if (err)
return err;
ctx->pid = server_pid; /* save it in case we need it later */
ctx->deinit_handler = do_deinit;
ctx->finish_handler = do_finish;
fd = socket (AF_UNIX, SOCK_STREAM, 0);
if (fd == -1)
{
LOGERROR1 ("can't create socket: %s\n", strerror (errno));
_assuan_release_context (ctx);
return ASSUAN_General_Error;
}
memset (&srvr_addr, 0, sizeof srvr_addr );
srvr_addr.sun_family = AF_UNIX;
strcpy (srvr_addr.sun_path, name);
len = (offsetof (struct sockaddr_un, sun_path)
+ strlen (srvr_addr.sun_path) + 1);
if (connect (fd, (struct sockaddr*)&srvr_addr, len) == -1)
{
LOGERROR2 ("can't connect to `%s': %s\n", name, strerror (errno));
_assuan_release_context (ctx);
close (fd );
return ASSUAN_Connect_Failed;
}
ctx->inbound.fd = fd;
ctx->outbound.fd = fd;
/* initial handshake */
{
int okay, off;
err = _assuan_read_from_server (ctx, &okay, &off);
if (err)
{
LOGERROR1 ("can't connect server: %s\n", assuan_strerror (err));
}
else if (okay != 1)
{
LOGERROR ("can't connect server: `");
_assuan_log_sanitized_string (ctx->inbound.line);
LOGERRORX ("'\n");
err = ASSUAN_Connect_Failed;
}
}
if (err)
{
assuan_disconnect (ctx);
}
else
*r_ctx = ctx;
return 0;
}

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