3 * $Id: un.c,v 1.9 2004/04/08 01:36:25 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 /*----- Header files ------------------------------------------------------*/
32 #undef sun /* Cretins */
41 #include <sys/types.h>
44 #include <sys/socket.h>
46 #include <arpa/inet.h>
49 #include <mLib/alloc.h>
50 #include <mLib/dstr.h>
51 #include <mLib/report.h>
63 /*----- Data structures ---------------------------------------------------*/
65 typedef struct un_addr {
67 struct sockaddr_un sun;
70 typedef struct un_opts {
75 /*----- Protocol operations -----------------------------------------------*/
79 static addr *un_read(scanner *sc, unsigned type)
84 conf_name(sc, '/', &d);
85 ua = xmalloc(sizeof(addr) +
86 offsetof(struct sockaddr_un, sun_path) +
89 ua->a.sz = offsetof(struct sockaddr_un, sun_path) + d.len + 1;
90 memset(&ua->sun, 0, ua->a.sz);
91 ua->sun.sun_family = AF_UNIX;
92 memcpy(ua->sun.sun_path, d.buf, d.len + 1);
97 /* --- @destroy@ --- */
99 static void un_destroy(addr *a)
101 un_addr *ua = (un_addr *)a;
105 /* --- @print@ --- */
107 static void un_print(addr *a, unsigned type, dstr *d)
109 un_addr *ua = (un_addr *)a;
110 dstr_puts(d, "unix:");
111 dstr_puts(d, ua->sun.sun_path);
114 /* --- @initopts@ --- */
116 static addr_opts *un_initopts(void)
118 un_opts *uo = CREATE(un_opts);
119 uo->f = fattr_global;
123 /* --- @option@ --- */
125 static int srcopt(scanner *sc, addr_opts *ao)
127 un_opts *uo = (un_opts *)ao;
128 CONF_BEGIN(sc, "source", "Unix domain socket source")
130 if (fattr_option(sc, uo ? &uo->f : &fattr_global))
136 static int un_option(scanner *sc, addr_opts *ao, unsigned type)
138 CONF_BEGIN(sc, "unix", "Unix domain socket");
139 if (type != ADDR_DEST && srcopt(sc, ao))
144 /* --- @accept@ --- */
146 static reffd *un_accept(int fd, addr_opts *ao, const char *desc)
149 un_opts *uo = (un_opts *)ao;
151 /* --- Accept the new connection --- */
154 char buf[PATH_MAX + sizeof(struct sockaddr)];
155 struct sockaddr_un *sun = (struct sockaddr_un *)buf;
156 size_t sunsz = sizeof(buf);
158 if ((nfd = accept(fd, (struct sockaddr *)sun, &sunsz)) < 0)
162 /* --- Log the connection --- *
164 * It'd be really nice if I could find out who the user is, but I can't in
165 * anything like a portable way.
168 if (!(uo->ao.f & ADDRF_NOLOG))
169 fw_log(-1, "[%s] accepted", desc);
170 return (reffd_init(nfd));
173 /* --- @freeopts@ --- */
175 static void un_freeopts(addr_opts *ao)
177 un_opts *uo = (un_opts *)ao;
183 static int un_bind(addr *a, addr_opts *ao)
185 un_addr *ua = (un_addr *)a;
186 un_opts *uo = (un_opts *)ao;
189 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
191 if (bind(fd, (struct sockaddr *)&ua->sun, sizeof(ua->sun)))
193 if (fattr_apply(ua->sun.sun_path, &uo->f))
203 /* --- @unbind@ --- */
205 static void un_unbind(addr *a)
207 un_addr *ua = (un_addr *)a;
208 unlink(ua->sun.sun_path);
211 /* --- @connect@ --- */
213 static int un_connect(addr *a, addr_opts *ao, conn *c, endpt *e)
215 un_addr *ua = (un_addr *)a;
218 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
220 return (conn_init(c, sel, fd, (struct sockaddr *)&ua->sun, sizeof(ua->sun),
221 starget_connected, e));
226 /* --- Protocol definition --- */
230 un_read, un_destroy, un_print,
231 un_initopts, un_option, 0, un_freeopts, un_bind, un_unbind, un_accept,
235 /*----- That's all, folks -------------------------------------------------*/