1 /*-
2 * Copyright (c) 1998 Mark Newton
3 * Copyright (c) 1994 Christos Zoulas
4 * Copyright (c) 1997 Todd Vierling
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The names of the authors may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Stolen from NetBSD /sys/compat/svr4/svr4_net.c. Pseudo-device driver
30 * skeleton produced from /usr/share/examples/drivers/make_pseudo_driver.sh
31 * in 3.0-980524-SNAP then hacked a bit (but probably not enough :-).
32 *
33 */
34
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h> /* SYSINIT stuff */
41 #include <sys/conf.h> /* cdevsw stuff */
42 #include <sys/malloc.h> /* malloc region definitions */
43 #include <sys/file.h>
44 #include <sys/filedesc.h>
45 #include <sys/unistd.h>
46 #include <sys/fcntl.h>
47 #include <sys/socket.h>
48 #include <sys/protosw.h>
49 #include <sys/socketvar.h>
50 #include <sys/syscallsubr.h>
51 #include <sys/un.h>
52 #include <sys/domain.h>
53 #include <net/if.h>
54 #include <netinet/in.h>
55 #include <sys/proc.h>
56 #include <sys/uio.h>
57
58 #include <sys/sysproto.h>
59
60 #include <compat/svr4/svr4_types.h>
61 #include <compat/svr4/svr4_util.h>
62 #include <compat/svr4/svr4_signal.h>
63 #include <compat/svr4/svr4_ioctl.h>
64 #include <compat/svr4/svr4_stropts.h>
65 #include <compat/svr4/svr4_socket.h>
66
67 static int svr4_soo_close(struct file *, struct thread *);
68 static int svr4_ptm_alloc(struct thread *);
69 static d_open_t streamsopen;
70
71 /*
72 * Device minor numbers
73 */
74 enum {
75 dev_ptm = 10,
76 dev_arp = 26,
77 dev_icmp = 27,
78 dev_ip = 28,
79 dev_tcp = 35,
80 dev_udp = 36,
81 dev_rawip = 37,
82 dev_unix_dgram = 38,
83 dev_unix_stream = 39,
84 dev_unix_ord_stream = 40
85 };
86
87 static struct cdev *dt_ptm, *dt_arp, *dt_icmp, *dt_ip, *dt_tcp, *dt_udp,
88 *dt_rawip, *dt_unix_dgram, *dt_unix_stream, *dt_unix_ord_stream;
89
90 static struct fileops svr4_netops;
91
92 static struct cdevsw streams_cdevsw = {
93 .d_version = D_VERSION,
94 .d_open = streamsopen,
95 .d_name = "streams",
96 };
97
98 struct streams_softc {
99 struct isa_device *dev;
100 } ;
101
102 #define UNIT(dev) dev2unit(dev) /* assume one minor number per unit */
103
104 typedef struct streams_softc *sc_p;
105
106 static int
streams_modevent(module_t mod,int type,void * unused)107 streams_modevent(module_t mod, int type, void *unused)
108 {
109 switch (type) {
110 case MOD_LOAD:
111 dt_ptm = make_dev(&streams_cdevsw, dev_ptm, 0, 0, 0666,
112 "ptm");
113 dt_arp = make_dev(&streams_cdevsw, dev_arp, 0, 0, 0666,
114 "arp");
115 dt_icmp = make_dev(&streams_cdevsw, dev_icmp, 0, 0, 0666,
116 "icmp");
117 dt_ip = make_dev(&streams_cdevsw, dev_ip, 0, 0, 0666,
118 "ip");
119 dt_tcp = make_dev(&streams_cdevsw, dev_tcp, 0, 0, 0666,
120 "tcp");
121 dt_udp = make_dev(&streams_cdevsw, dev_udp, 0, 0, 0666,
122 "udp");
123 dt_rawip = make_dev(&streams_cdevsw, dev_rawip, 0, 0, 0666,
124 "rawip");
125 dt_unix_dgram = make_dev(&streams_cdevsw, dev_unix_dgram,
126 0, 0, 0666, "ticlts");
127 dt_unix_stream = make_dev(&streams_cdevsw, dev_unix_stream,
128 0, 0, 0666, "ticots");
129 dt_unix_ord_stream = make_dev(&streams_cdevsw,
130 dev_unix_ord_stream, 0, 0, 0666, "ticotsord");
131
132 if (! (dt_ptm && dt_arp && dt_icmp && dt_ip && dt_tcp &&
133 dt_udp && dt_rawip && dt_unix_dgram &&
134 dt_unix_stream && dt_unix_ord_stream)) {
135 printf("WARNING: device config for STREAMS failed\n");
136 printf("Suggest unloading streams KLD\n");
137 }
138
139 /* Inherit generic socket file operations, except close(2). */
140 bcopy(&socketops, &svr4_netops, sizeof(struct fileops));
141 svr4_netops.fo_close = svr4_soo_close;
142
143 return 0;
144 case MOD_UNLOAD:
145 /* XXX should check to see if it's busy first */
146 destroy_dev(dt_ptm);
147 destroy_dev(dt_arp);
148 destroy_dev(dt_icmp);
149 destroy_dev(dt_ip);
150 destroy_dev(dt_tcp);
151 destroy_dev(dt_udp);
152 destroy_dev(dt_rawip);
153 destroy_dev(dt_unix_dgram);
154 destroy_dev(dt_unix_stream);
155 destroy_dev(dt_unix_ord_stream);
156
157 return 0;
158 default:
159 return EOPNOTSUPP;
160 break;
161 }
162 return 0;
163 }
164
165 static moduledata_t streams_mod = {
166 "streams",
167 streams_modevent,
168 0
169 };
170 DECLARE_MODULE(streams, streams_mod, SI_SUB_DRIVERS, SI_ORDER_ANY);
171 MODULE_VERSION(streams, 1);
172 MODULE_DEPEND(streams, svr4elf, 1, 1, 1);
173
174 /*
175 * We only need open() and close() routines. open() calls socreate()
176 * to allocate a "real" object behind the stream and mallocs some state
177 * info for use by the svr4 emulator; close() deallocates the state
178 * information and passes the underlying object to the normal socket close
179 * routine.
180 */
181 static int
streamsopen(struct cdev * dev,int oflags,int devtype,struct thread * td)182 streamsopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
183 {
184 struct svr4_strm *st;
185 struct socket *so;
186 struct file *fp;
187 int family, type, protocol;
188 int error, fd;
189
190 if (td->td_dupfd >= 0)
191 return ENODEV;
192
193 switch (dev2unit(dev)) {
194 case dev_udp:
195 family = AF_INET;
196 type = SOCK_DGRAM;
197 protocol = IPPROTO_UDP;
198 break;
199
200 case dev_tcp:
201 family = AF_INET;
202 type = SOCK_STREAM;
203 protocol = IPPROTO_TCP;
204 break;
205
206 case dev_ip:
207 case dev_rawip:
208 family = AF_INET;
209 type = SOCK_RAW;
210 protocol = IPPROTO_IP;
211 break;
212
213 case dev_icmp:
214 family = AF_INET;
215 type = SOCK_RAW;
216 protocol = IPPROTO_ICMP;
217 break;
218
219 case dev_unix_dgram:
220 family = AF_LOCAL;
221 type = SOCK_DGRAM;
222 protocol = 0;
223 break;
224
225 case dev_unix_stream:
226 case dev_unix_ord_stream:
227 family = AF_LOCAL;
228 type = SOCK_STREAM;
229 protocol = 0;
230 break;
231
232 case dev_ptm:
233 return svr4_ptm_alloc(td);
234
235 default:
236 return EOPNOTSUPP;
237 }
238
239 if ((error = falloc(td, &fp, &fd, 0)) != 0)
240 return error;
241 /* An extra reference on `fp' has been held for us by falloc(). */
242
243 error = socreate(family, &so, type, protocol, td->td_ucred, td);
244 if (error) {
245 fdclose(td, fp, fd);
246 fdrop(fp, td);
247 return error;
248 }
249
250 finit(fp, FREAD | FWRITE, DTYPE_SOCKET, so, &svr4_netops);
251
252 /*
253 * Allocate a stream structure and attach it to this socket.
254 * We don't bother locking so_emuldata for SVR4 stream sockets as
255 * its value is constant for the lifetime of the stream once it
256 * is initialized here.
257 */
258 st = malloc(sizeof(struct svr4_strm), M_TEMP, M_WAITOK);
259 st->s_family = so->so_proto->pr_domain->dom_family;
260 st->s_cmd = ~0;
261 st->s_afd = -1;
262 st->s_eventmask = 0;
263 so->so_emuldata = st;
264
265 fdrop(fp, td);
266 td->td_dupfd = fd;
267 return ENXIO;
268 }
269
270 static int
svr4_ptm_alloc(td)271 svr4_ptm_alloc(td)
272 struct thread *td;
273 {
274 /*
275 * XXX this is very, very ugly. But I can't find a better
276 * way that won't duplicate a big amount of code from
277 * sys_open(). Ho hum...
278 *
279 * Fortunately for us, Solaris (at least 2.5.1) makes the
280 * /dev/ptmx open automatically just open a pty, that (after
281 * STREAMS I_PUSHes), is just a plain pty. fstat() is used
282 * to get the minor device number to map to a tty.
283 *
284 * Cycle through the names. If sys_open() returns ENOENT (or
285 * ENXIO), short circuit the cycle and exit.
286 *
287 * XXX: Maybe this can now be implemented by posix_openpt()?
288 */
289 static char ptyname[] = "/dev/ptyXX";
290 static char ttyletters[] = "pqrstuwxyzPQRST";
291 static char ttynumbers[] = "0123456789abcdef";
292 struct proc *p;
293 register_t fd;
294 int error, l, n;
295
296 fd = -1;
297 n = 0;
298 l = 0;
299 p = td->td_proc;
300 while (fd == -1) {
301 ptyname[8] = ttyletters[l];
302 ptyname[9] = ttynumbers[n];
303
304 error = kern_openat(td, AT_FDCWD, ptyname, UIO_SYSSPACE,
305 O_RDWR, 0);
306 switch (error) {
307 case ENOENT:
308 case ENXIO:
309 return error;
310 case 0:
311 td->td_dupfd = td->td_retval[0];
312 return ENXIO;
313 default:
314 if (ttynumbers[++n] == '\0') {
315 if (ttyletters[++l] == '\0')
316 break;
317 n = 0;
318 }
319 }
320 }
321 return ENOENT;
322 }
323
324
325 static int
svr4_soo_close(struct file * fp,struct thread * td)326 svr4_soo_close(struct file *fp, struct thread *td)
327 {
328 struct socket *so = fp->f_data;
329
330 /* CHECKUNIT_DIAG(ENXIO);*/
331
332 svr4_delete_socket(td->td_proc, fp);
333 free(so->so_emuldata, M_TEMP);
334
335 fp->f_ops = &badfileops;
336 fp->f_data = NULL;
337
338 return soclose(so);
339 }
340