3 * Protocol specific definitions for Unix-domain sockets
5 * (c) 1999 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the `fw' port forwarder.
12 * `fw' is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * `fw' is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with `fw'; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 /*----- Header files ------------------------------------------------------*/
30 #undef sun /* Cretins */
39 #include <sys/types.h>
42 #include <sys/socket.h>
44 #include <arpa/inet.h>
47 #include <mLib/alloc.h>
48 #include <mLib/dstr.h>
49 #include <mLib/report.h>
61 /*----- Data structures ---------------------------------------------------*/
63 typedef struct un_addr
{
65 struct sockaddr_un sun
;
68 typedef struct un_opts
{
73 /*----- Protocol operations -----------------------------------------------*/
77 static addr
*un_read(scanner
*sc
, unsigned type
)
82 conf_name(sc
, '/', &d
);
83 ua
= xmalloc(sizeof(addr
) +
84 offsetof(struct sockaddr_un
, sun_path
) +
87 ua
->a
.sz
= offsetof(struct sockaddr_un
, sun_path
) + d
.len
+ 1;
88 memset(&ua
->sun
, 0, ua
->a
.sz
);
89 ua
->sun
.sun_family
= AF_UNIX
;
90 memcpy(ua
->sun
.sun_path
, d
.buf
, d
.len
+ 1);
95 /* --- @destroy@ --- */
97 static void un_destroy(addr
*a
)
99 un_addr
*ua
= (un_addr
*)a
;
103 /* --- @print@ --- */
105 static void un_print(addr
*a
, unsigned type
, dstr
*d
)
107 un_addr
*ua
= (un_addr
*)a
;
108 dstr_puts(d
, "unix:");
109 dstr_puts(d
, ua
->sun
.sun_path
);
112 /* --- @initopts@ --- */
114 static addr_opts
*un_initopts(void)
116 un_opts
*uo
= CREATE(un_opts
);
117 uo
->f
= fattr_global
;
121 /* --- @option@ --- */
123 static int srcopt(scanner
*sc
, addr_opts
*ao
)
125 un_opts
*uo
= (un_opts
*)ao
;
126 CONF_BEGIN(sc
, "source", "Unix domain socket source")
128 if (fattr_option(sc
, uo ?
&uo
->f
: &fattr_global
))
134 static int un_option(scanner
*sc
, addr_opts
*ao
, unsigned type
)
136 CONF_BEGIN(sc
, "unix", "Unix domain socket");
137 if (type
!= ADDR_DEST
&& srcopt(sc
, ao
))
142 /* --- @accept@ --- */
144 static reffd
*un_accept(int fd
, addr_opts
*ao
, const char *desc
)
147 un_opts
*uo
= (un_opts
*)ao
;
149 /* --- Accept the new connection --- */
152 char buf
[PATH_MAX
+ sizeof(struct sockaddr
)];
153 struct sockaddr_un
*sun
= (struct sockaddr_un
*)buf
;
154 size_t sunsz
= sizeof(buf
);
156 if ((nfd
= accept(fd
, (struct sockaddr
*)sun
, &sunsz
)) < 0)
160 /* --- Log the connection --- *
162 * It'd be really nice if I could find out who the user is, but I can't in
163 * anything like a portable way.
166 if (!(uo
->ao
.f
& ADDRF_NOLOG
))
167 fw_log(-1, "[%s] accepted", desc
);
168 return (reffd_init(nfd
));
171 /* --- @freeopts@ --- */
173 static void un_freeopts(addr_opts
*ao
)
175 un_opts
*uo
= (un_opts
*)ao
;
181 static int un_bind(addr
*a
, addr_opts
*ao
)
183 un_addr
*ua
= (un_addr
*)a
;
184 un_opts
*uo
= (un_opts
*)ao
;
187 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
189 if (bind(fd
, (struct sockaddr
*)&ua
->sun
, sizeof(ua
->sun
)))
191 if (fattr_apply(ua
->sun
.sun_path
, &uo
->f
))
201 /* --- @unbind@ --- */
203 static void un_unbind(addr
*a
)
205 un_addr
*ua
= (un_addr
*)a
;
206 unlink(ua
->sun
.sun_path
);
209 /* --- @connect@ --- */
211 static int un_connect(addr
*a
, addr_opts
*ao
, conn
*c
, endpt
*e
)
213 un_addr
*ua
= (un_addr
*)a
;
216 if ((fd
= socket(PF_UNIX
, SOCK_STREAM
, 0)) < 0)
218 return (conn_init(c
, sel
, fd
, (struct sockaddr
*)&ua
->sun
, sizeof(ua
->sun
),
219 starget_connected
, e
));
224 /* --- Protocol definition --- */
228 un_read
, un_destroy
, un_print
,
229 un_initopts
, un_option
, 0, un_freeopts
, un_bind
, un_unbind
, un_accept
,
233 /*----- That's all, folks -------------------------------------------------*/