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/* assuan-socket-connect.c - Assuan socket based client
Copyright (C) 2002, 2003, 2004, 2009 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, see <http://www.gnu.org/licenses/>.
*/
#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"
#include "debug.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 void
do_finish (assuan_context_t ctx)
{
if (ctx->inbound.fd != ASSUAN_INVALID_FD)
{
_assuan_close (ctx, ctx->inbound.fd);
ctx->inbound.fd = ASSUAN_INVALID_FD;
}
if (ctx->outbound.fd != ASSUAN_INVALID_FD)
{
_assuan_close (ctx, ctx->outbound.fd);
ctx->outbound.fd = ASSUAN_INVALID_FD;
}
}
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. */
gpg_error_t
assuan_socket_connect (assuan_context_t ctx,
const char *name, pid_t server_pid)
{
return assuan_socket_connect_ext (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
recvmsg are used. */
gpg_error_t
assuan_socket_connect_ext (assuan_context_t ctx,
const char *name, pid_t server_pid,
unsigned int flags)
{
gpg_error_t err;
assuan_fd_t fd;
struct sockaddr_un srvr_addr;
size_t len;
const char *s;
if (!ctx || !name)
return _assuan_error (ctx, GPG_ERR_ASS_INV_VALUE);
/* 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 driver prefix. */
s = name;
if (*s && s[1] == ':')
s += 2;
if (*s != DIRSEP_C && *s != '/')
return _assuan_error (ctx, GPG_ERR_ASS_INV_VALUE);
if (strlen (name)+1 >= sizeof srvr_addr.sun_path)
return _assuan_error (ctx, GPG_ERR_ASS_INV_VALUE);
fd = _assuan_sock_new (ctx, PF_LOCAL, SOCK_STREAM, 0);
if (fd == ASSUAN_INVALID_FD)
{
TRACE1 (ctx, ASSUAN_LOG_SYSIO, "assuan_socket_connect_ext", ctx,
"can't create socket: %s", strerror (errno));
/* FIXME: Cleanup */
return _assuan_error (ctx, GPG_ERR_ASS_GENERAL);
}
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 (ctx, fd, (struct sockaddr *) &srvr_addr, len) == -1)
{
TRACE2 (ctx, ASSUAN_LOG_SYSIO, "assuan_socket_connect_ext", ctx,
"can't connect to `%s': %s\n", name, strerror (errno));
/* FIXME: Cleanup */
_assuan_close (ctx, fd);
return _assuan_error (ctx, GPG_ERR_ASS_CONNECT_FAILED);
}
ctx->engine.release = _assuan_disconnect;
ctx->engine.readfnc = _assuan_simple_read;
ctx->engine.writefnc = _assuan_simple_write;
ctx->engine.sendfd = NULL;
ctx->engine.receivefd = NULL;
ctx->deinit_handler = ((flags&1))? _assuan_uds_deinit : do_deinit;
ctx->finish_handler = do_finish;
ctx->inbound.fd = fd;
ctx->outbound.fd = fd;
if (flags & 1)
_assuan_init_uds_io (ctx);
/* initial handshake */
{
int okay, off;
err = _assuan_read_from_server (ctx, &okay, &off);
if (err)
TRACE1 (ctx, ASSUAN_LOG_SYSIO, "assuan_socket_connect_ext", ctx,
"can't connect to server: %s\n", gpg_strerror (err));
else if (okay != 1)
{
char *sname = _assuan_encode_c_string (ctx, ctx->inbound.line);
if (sname)
{
TRACE1 (ctx, ASSUAN_LOG_SYSIO, "assuan_socket_connect_ext", ctx,
"can't connect to server: %s", sname);
_assuan_free (ctx, sname);
}
err = _assuan_error (ctx, GPG_ERR_ASS_CONNECT_FAILED);
}
}
if (err)
_assuan_reset (ctx);
return err;
}
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