3 * $Id: un.c,v 1.6 2003/11/25 14:08:23 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 1.6 2003/11/25 14:08:23 mdw
33 * Debianization. Socket target options. Internet binding.
35 * Revision 1.5 2002/02/22 23:43:32 mdw
36 * Call @xfree@ rather than @free@.
38 * Revision 1.4 2000/08/01 17:59:56 mdw
39 * Switch over to using `size_t' for socket address lengths.
41 * Revision 1.3 2000/08/01 17:58:32 mdw
42 * Remove unnecessary <ctype.h> header.
44 * Revision 1.2 1999/07/27 18:30:53 mdw
45 * Various minor portability fixes.
47 * Revision 1.1 1999/07/26 23:34:11 mdw
48 * New socket address types.
52 /*----- Header files ------------------------------------------------------*/
55 #undef sun /* Cretins */
64 #include <sys/types.h>
67 #include <sys/socket.h>
69 #include <arpa/inet.h>
72 #include <mLib/alloc.h>
73 #include <mLib/dstr.h>
74 #include <mLib/report.h>
86 /*----- Data structures ---------------------------------------------------*/
88 typedef struct un_addr {
90 struct sockaddr_un sun;
93 typedef struct un_opts {
98 /*----- Protocol operations -----------------------------------------------*/
102 static addr *un_read(scanner *sc, unsigned type)
107 conf_name(sc, '/', &d);
108 ua = xmalloc(sizeof(addr) +
109 offsetof(struct sockaddr_un, sun_path) +
112 ua->a.sz = offsetof(struct sockaddr_un, sun_path) + d.len + 1;
113 memset(&ua->sun, 0, ua->a.sz);
114 ua->sun.sun_family = AF_UNIX;
115 memcpy(ua->sun.sun_path, d.buf, d.len + 1);
120 /* --- @destroy@ --- */
122 static void un_destroy(addr *a)
124 un_addr *ua = (un_addr *)a;
128 /* --- @print@ --- */
130 static void un_print(addr *a, unsigned type, dstr *d)
132 un_addr *ua = (un_addr *)a;
133 dstr_puts(d, "unix:");
134 dstr_puts(d, ua->sun.sun_path);
137 /* --- @initopts@ --- */
139 static addr_opts *un_initopts(void)
141 un_opts *uo = CREATE(un_opts);
142 uo->f = fattr_global;
146 /* --- @option@ --- */
148 static int srcopt(scanner *sc, addr_opts *ao)
150 un_opts *uo = (un_opts *)ao;
151 CONF_BEGIN(sc, "unix", "Unix domain socket")
153 if (fattr_option(sc, uo ? &uo->f : &fattr_global))
159 static int un_option(scanner *sc, addr_opts *ao, unsigned type)
161 CONF_BEGIN(sc, "unix", "Unix domain socket");
162 if (type != ADDR_DEST && srcopt(sc, ao))
167 /* --- @accept@ --- */
169 static reffd *un_accept(int fd, addr_opts *ao, const char *desc)
172 un_opts *uo = (un_opts *)ao;
174 /* --- Accept the new connection --- */
177 char buf[PATH_MAX + sizeof(struct sockaddr)];
178 struct sockaddr_un *sun = (struct sockaddr_un *)buf;
179 size_t sunsz = sizeof(buf);
181 if ((nfd = accept(fd, (struct sockaddr *)sun, &sunsz)) < 0)
185 /* --- Log the connection --- *
187 * It'd be really nice if I could find out who the user is, but I can't in
188 * anything like a portable way.
191 if (!(uo->ao.f & ADDRF_NOLOG))
192 fw_log(-1, "[%s] accepted", desc);
193 return (reffd_init(nfd));
196 /* --- @freeopts@ --- */
198 static void un_freeopts(addr_opts *ao)
200 un_opts *uo = (un_opts *)ao;
206 static int un_bind(addr *a, addr_opts *ao)
208 un_addr *ua = (un_addr *)a;
209 un_opts *uo = (un_opts *)ao;
212 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
214 if (bind(fd, (struct sockaddr *)&ua->sun, sizeof(ua->sun)))
216 if (fattr_apply(ua->sun.sun_path, &uo->f))
226 /* --- @unbind@ --- */
228 static void un_unbind(addr *a)
230 un_addr *ua = (un_addr *)a;
231 unlink(ua->sun.sun_path);
234 /* --- @connect@ --- */
236 static int un_connect(addr *a, addr_opts *ao, conn *c, endpt *e)
238 un_addr *ua = (un_addr *)a;
241 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
243 return (conn_init(c, sel, fd, (struct sockaddr *)&ua->sun, sizeof(ua->sun),
244 starget_connected, e));
249 /* --- Protocol definition --- */
253 un_read, un_destroy, un_print,
254 un_initopts, un_option, un_freeopts, un_bind, un_unbind, un_accept,
258 /*----- That's all, folks -------------------------------------------------*/