3 * Protocol specific definitions for Unix-domain sockets
5 * (c) 1999 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the `fwd' port forwarder.
12 * `fwd' 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 * `fwd' 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 `fwd'; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Data structures ---------------------------------------------------*/
31 typedef struct un_addr {
33 struct sockaddr_un sun;
36 typedef struct un_opts {
41 /*----- Protocol operations -----------------------------------------------*/
45 static addr *un_read(scanner *sc, unsigned type)
51 ua = xmalloc(sizeof(addr) +
52 offsetof(struct sockaddr_un, sun_path) +
55 ua->a.sz = offsetof(struct sockaddr_un, sun_path) + d.len + 1;
56 memset(&ua->sun, 0, ua->a.sz);
57 ua->sun.sun_family = AF_UNIX;
58 memcpy(ua->sun.sun_path, d.buf, d.len + 1);
63 /* --- @destroy@ --- */
65 static void un_destroy(addr *a)
67 un_addr *ua = (un_addr *)a;
73 static void un_print(addr *a, unsigned type, dstr *d)
75 un_addr *ua = (un_addr *)a;
76 dstr_puts(d, "unix:");
77 dstr_puts(d, ua->sun.sun_path);
80 /* --- @initopts@ --- */
82 static addr_opts *un_initopts(void)
84 un_opts *uo = CREATE(un_opts);
89 /* --- @option@ --- */
91 static int srcopt(scanner *sc, addr_opts *ao)
93 un_opts *uo = (un_opts *)ao;
94 CONF_BEGIN(sc, "source", "Unix domain socket source")
96 if (fattr_option(sc, uo ? &uo->f : &fattr_global))
102 static int un_option(scanner *sc, addr_opts *ao, unsigned type)
104 CONF_BEGIN(sc, "unix", "Unix domain socket");
105 if (type != ADDR_DEST && srcopt(sc, ao))
110 /* --- @accept@ --- */
112 static reffd *un_accept(int fd, addr_opts *ao, const char *desc)
115 un_opts *uo = (un_opts *)ao;
117 /* --- Accept the new connection --- */
120 char buf[PATH_MAX + sizeof(struct sockaddr)];
121 struct sockaddr_un *sun = (struct sockaddr_un *)buf;
122 socklen_t sunsz = sizeof(buf);
124 if ((nfd = accept(fd, (struct sockaddr *)sun, &sunsz)) < 0)
128 /* --- Log the connection --- *
130 * It'd be really nice if I could find out who the user is, but I can't in
131 * anything like a portable way.
134 if (!(uo->ao.f & ADDRF_NOLOG))
135 fw_log(-1, "[%s] accepted", desc);
136 return (reffd_init(nfd));
139 /* --- @freeopts@ --- */
141 static void un_freeopts(addr_opts *ao)
143 un_opts *uo = (un_opts *)ao;
149 static int un_bind(addr *a, addr_opts *ao)
151 un_addr *ua = (un_addr *)a;
152 un_opts *uo = (un_opts *)ao;
155 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
157 if (bind(fd, (struct sockaddr *)&ua->sun, sizeof(ua->sun)))
159 if (fattr_apply(ua->sun.sun_path, &uo->f))
169 /* --- @unbind@ --- */
171 static void un_unbind(addr *a)
173 un_addr *ua = (un_addr *)a;
174 unlink(ua->sun.sun_path);
177 /* --- @connect@ --- */
179 static int un_connect(addr *a, addr_opts *ao, conn *c, endpt *e)
181 un_addr *ua = (un_addr *)a;
184 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
186 return (conn_init(c, sel, fd, (struct sockaddr *)&ua->sun, sizeof(ua->sun),
187 starget_connected, e));
192 /* --- Protocol definition --- */
196 un_read, un_destroy, un_print,
197 un_initopts, un_option, 0, un_freeopts, un_bind, un_unbind, un_accept,
201 /*----- That's all, folks -------------------------------------------------*/