1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/* 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
/* 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 (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;
TRACE2 (ctx, ASSUAN_LOG_CTX, "assuan_socket_connect", ctx,
"name=%s, flags=0x%x", name ? name : "(null)", flags);
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_client_release;
ctx->engine.readfnc = _assuan_simple_read;
ctx->engine.writefnc = _assuan_simple_write;
ctx->engine.sendfd = NULL;
ctx->engine.receivefd = NULL;
ctx->finish_handler = _assuan_client_finish;
ctx->inbound.fd = fd;
ctx->outbound.fd = fd;
ctx->max_accepts = -1;
if (flags & ASSUAN_SOCKET_CONNECT_FDPASSING)
_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;
}
|
