f701f6a30613e2ff5c3e6d74c760076e6d2611c0
3 * $Id: un.c,v 1.7 2003/11/29 20:36:07 mdw Exp $
5 * Protocol specific definitions for Unix-domain sockets
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the `fw' port forwarder.
14 * `fw' is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * `fw' is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with `fw'; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Revision history --------------------------------------------------*
32 * Revision 1.7 2003/11/29 20:36:07 mdw
33 * Privileged outgoing connections.
35 * Revision 1.6 2003/11/25 14:08:23 mdw
36 * Debianization. Socket target options. Internet binding.
38 * Revision 1.5 2002/02/22 23:43:32 mdw
39 * Call @xfree@ rather than @free@.
41 * Revision 1.4 2000/08/01 17:59:56 mdw
42 * Switch over to using `size_t' for socket address lengths.
44 * Revision 1.3 2000/08/01 17:58:32 mdw
45 * Remove unnecessary <ctype.h> header.
47 * Revision 1.2 1999/07/27 18:30:53 mdw
48 * Various minor portability fixes.
50 * Revision 1.1 1999/07/26 23:34:11 mdw
51 * New socket address types.
55 /*----- Header files ------------------------------------------------------*/
58 #undef sun /* Cretins */
67 #include <sys/types.h>
70 #include <sys/socket.h>
72 #include <arpa/inet.h>
75 #include <mLib/alloc.h>
76 #include <mLib/dstr.h>
77 #include <mLib/report.h>
89 /*----- Data structures ---------------------------------------------------*/
91 typedef struct un_addr
{
93 struct sockaddr_un sun
;
96 typedef struct un_opts
{
101 /*----- Protocol operations -----------------------------------------------*/
105 static addr
*un_read(scanner
*sc
, unsigned type
)
110 conf_name(sc
, '/', &d
);
111 ua
= xmalloc(sizeof(addr
) +
112 offsetof(struct sockaddr_un
, sun_path
) +
115 ua
->a
.sz
= offsetof(struct sockaddr_un
, sun_path
) + d
.len
+ 1;
116 memset(&ua
->sun
, 0, ua
->a
.sz
);
117 ua
->sun
.sun_family
= AF_UNIX
;
118 memcpy(ua
->sun
.sun_path
, d
.buf
, d
.len
+ 1);
123 /* --- @destroy@ --- */
125 static void un_destroy(addr
*a
)
127 un_addr
*ua
= (un_addr
*)a
;
131 /* --- @print@ --- */
133 static void un_print(addr
*a
, unsigned type
, dstr
*d
)
135 un_addr
*ua
= (un_addr
*)a
;
136 dstr_puts(d
, "unix:");
137 dstr_puts(d
, ua
->sun
.sun_path
);
140 /* --- @initopts@ --- */
142 static addr_opts
*un_initopts(void)
144 un_opts
*uo
= CREATE(un_opts
);
145 uo
->f
= fattr_global
;
149 /* --- @option@ --- */
151 static int srcopt(scanner
*sc
, addr_opts
*ao
)
153 un_opts
*uo
= (un_opts
*)ao
;
154 CONF_BEGIN(sc
, "unix", "Unix domain socket")
156 if (fattr_option(sc
, uo ?
&uo
->f
: &fattr_global
))
162 static int un_option(scanner
*sc
, addr_opts
*ao
, unsigned type
)
164 CONF_BEGIN(sc
, "unix", "Unix domain socket");
165 if (type
!= ADDR_DEST
&& srcopt(sc
, ao
))
170 /* --- @accept@ --- */
172 static reffd
*un_accept(int fd
, addr_opts
*ao
, const char *desc
)
175 un_opts
*uo
= (un_opts
*)ao
;
177 /* --- Accept the new connection --- */
180 char buf
[PATH_MAX
+ sizeof(struct sockaddr
)];
181 struct sockaddr_un
*sun
= (struct sockaddr_un
*)buf
;
182 size_t sunsz
= sizeof(buf
);
184 if ((nfd
= accept(fd
, (struct sockaddr
*)sun
, &sunsz
)) < 0)
188 /* --- Log the connection --- *
190 * It'd be really nice if I could find out who the user is, but I can't in
191 * anything like a portable way.
194 if (!(uo
->ao
.f
& ADDRF_NOLOG
))
195 fw_log(-1, "[%s] accepted", desc
);
196 return (reffd_init(nfd
));
199 /* --- @freeopts@ --- */
201 static void un_freeopts(addr_opts
*ao
)
203 un_opts
*uo
= (un_opts
*)ao
;
209 static int un_bind(addr
*a
, addr_opts
*ao
)
211 un_addr
*ua
= (un_addr
*)a
;
212 un_opts
*uo
= (un_opts
*)ao
;
215 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
217 if (bind(fd
, (struct sockaddr
*)&ua
->sun
, sizeof(ua
->sun
)))
219 if (fattr_apply(ua
->sun
.sun_path
, &uo
->f
))
229 /* --- @unbind@ --- */
231 static void un_unbind(addr
*a
)
233 un_addr
*ua
= (un_addr
*)a
;
234 unlink(ua
->sun
.sun_path
);
237 /* --- @connect@ --- */
239 static int un_connect(addr
*a
, addr_opts
*ao
, conn
*c
, endpt
*e
)
241 un_addr
*ua
= (un_addr
*)a
;
244 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
246 return (conn_init(c
, sel
, fd
, (struct sockaddr
*)&ua
->sun
, sizeof(ua
->sun
),
247 starget_connected
, e
));
252 /* --- Protocol definition --- */
256 un_read
, un_destroy
, un_print
,
257 un_initopts
, un_option
, 0, un_freeopts
, un_bind
, un_unbind
, un_accept
,
261 /*----- That's all, folks -------------------------------------------------*/