streams.c revision 241394
175406Sache/*- 226497Sache * Copyright (c) 1998 Mark Newton 335486Sache * Copyright (c) 1994 Christos Zoulas 435486Sache * Copyright (c) 1997 Todd Vierling 535486Sache * All rights reserved. 626497Sache * 726497Sache * Redistribution and use in source and binary forms, with or without 826497Sache * modification, are permitted provided that the following conditions 926497Sache * are met: 1026497Sache * 1. Redistributions of source code must retain the above copyright 1126497Sache * notice, this list of conditions and the following disclaimer. 1226497Sache * 2. Redistributions in binary form must reproduce the above copyright 1326497Sache * notice, this list of conditions and the following disclaimer in the 1426497Sache * documentation and/or other materials provided with the distribution. 1526497Sache * 3. The names of the authors may not be used to endorse or promote products 1626497Sache * derived from this software without specific prior written permission 1758310Sache * 1858310Sache * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1958310Sache * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2026497Sache * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2126497Sache * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2226497Sache * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2326497Sache * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2426497Sache * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2526497Sache * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2626497Sache * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2726497Sache * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2826497Sache * 2926497Sache * Stolen from NetBSD /sys/compat/svr4/svr4_net.c. Pseudo-device driver 3026497Sache * skeleton produced from /usr/share/examples/drivers/make_pseudo_driver.sh 3126497Sache * in 3.0-980524-SNAP then hacked a bit (but probably not enough :-). 3226497Sache * 3326497Sache */ 3426497Sache 3526497Sache#include <sys/cdefs.h> 3626497Sache__FBSDID("$FreeBSD: head/sys/dev/streams/streams.c 241394 2012-10-10 08:36:38Z kevlo $"); 3726497Sache 3826497Sache#include <sys/param.h> 3926497Sache#include <sys/systm.h> 4026497Sache#include <sys/kernel.h> /* SYSINIT stuff */ 4126497Sache#include <sys/conf.h> /* cdevsw stuff */ 4226497Sache#include <sys/malloc.h> /* malloc region definitions */ 4326497Sache#include <sys/file.h> 4426497Sache#include <sys/filedesc.h> 4526497Sache#include <sys/unistd.h> 4626497Sache#include <sys/fcntl.h> 4726497Sache#include <sys/socket.h> 4826497Sache#include <sys/protosw.h> 4926497Sache#include <sys/socketvar.h> 5026497Sache#include <sys/syscallsubr.h> 5126497Sache#include <sys/un.h> 5226497Sache#include <sys/domain.h> 5326497Sache#include <net/if.h> 5426497Sache#include <netinet/in.h> 5526497Sache#include <sys/proc.h> 5626497Sache#include <sys/uio.h> 5726497Sache 5826497Sache#include <sys/sysproto.h> 5926497Sache 6026497Sache#include <compat/svr4/svr4_types.h> 6126497Sache#include <compat/svr4/svr4_util.h> 6226497Sache#include <compat/svr4/svr4_signal.h> 6326497Sache#include <compat/svr4/svr4_ioctl.h> 6426497Sache#include <compat/svr4/svr4_stropts.h> 6526497Sache#include <compat/svr4/svr4_socket.h> 6626497Sache 6726497Sachestatic int svr4_soo_close(struct file *, struct thread *); 6826497Sachestatic int svr4_ptm_alloc(struct thread *); 6926497Sachestatic d_open_t streamsopen; 7026497Sache 7126497Sache/* 7226497Sache * Device minor numbers 7326497Sache */ 7426497Sacheenum { 7526497Sache dev_ptm = 10, 7626497Sache dev_arp = 26, 7726497Sache dev_icmp = 27, 7826497Sache dev_ip = 28, 7926497Sache dev_tcp = 35, 8026497Sache dev_udp = 36, 8126497Sache dev_rawip = 37, 8226497Sache dev_unix_dgram = 38, 8326497Sache dev_unix_stream = 39, 8426497Sache dev_unix_ord_stream = 40 8526497Sache}; 8626497Sache 8726497Sachestatic struct cdev *dt_ptm, *dt_arp, *dt_icmp, *dt_ip, *dt_tcp, *dt_udp, 8826497Sache *dt_rawip, *dt_unix_dgram, *dt_unix_stream, *dt_unix_ord_stream; 8926497Sache 9026497Sachestatic struct fileops svr4_netops = { 9126497Sache .fo_read = soo_read, 9226497Sache .fo_write = soo_write, 9326497Sache .fo_truncate = soo_truncate, 9426497Sache .fo_ioctl = soo_ioctl, 9526497Sache .fo_poll = soo_poll, 9626497Sache .fo_kqfilter = soo_kqfilter, 9726497Sache .fo_stat = soo_stat, 9826497Sache .fo_close = svr4_soo_close, 9926497Sache .fo_chmod = invfo_chmod, 10026497Sache .fo_chown = invfo_chown, 10135486Sache}; 10235486Sache 10335486Sachestatic struct cdevsw streams_cdevsw = { 10435486Sache .d_version = D_VERSION, 10526497Sache .d_open = streamsopen, 10626497Sache .d_name = "streams", 10726497Sache}; 10826497Sache 10926497Sachestruct streams_softc { 11026497Sache struct isa_device *dev; 11126497Sache} ; 11226497Sache 11326497Sache#define UNIT(dev) dev2unit(dev) /* assume one minor number per unit */ 11426497Sache 11526497Sachetypedef struct streams_softc *sc_p; 11626497Sache 11726497Sachestatic int 11826497Sachestreams_modevent(module_t mod, int type, void *unused) 11926497Sache{ 12026497Sache switch (type) { 12126497Sache case MOD_LOAD: 12226497Sache dt_ptm = make_dev(&streams_cdevsw, dev_ptm, 0, 0, 0666, 12326497Sache "ptm"); 12426497Sache dt_arp = make_dev(&streams_cdevsw, dev_arp, 0, 0, 0666, 12526497Sache "arp"); 12626497Sache dt_icmp = make_dev(&streams_cdevsw, dev_icmp, 0, 0, 0666, 12726497Sache "icmp"); 12826497Sache dt_ip = make_dev(&streams_cdevsw, dev_ip, 0, 0, 0666, 12926497Sache "ip"); 13026497Sache dt_tcp = make_dev(&streams_cdevsw, dev_tcp, 0, 0, 0666, 13126497Sache "tcp"); 13226497Sache dt_udp = make_dev(&streams_cdevsw, dev_udp, 0, 0, 0666, 13326497Sache "udp"); 13426497Sache dt_rawip = make_dev(&streams_cdevsw, dev_rawip, 0, 0, 0666, 13526497Sache "rawip"); 13626497Sache dt_unix_dgram = make_dev(&streams_cdevsw, dev_unix_dgram, 13726497Sache 0, 0, 0666, "ticlts"); 13826497Sache dt_unix_stream = make_dev(&streams_cdevsw, dev_unix_stream, 13926497Sache 0, 0, 0666, "ticots"); 14026497Sache dt_unix_ord_stream = make_dev(&streams_cdevsw, 14126497Sache dev_unix_ord_stream, 0, 0, 0666, "ticotsord"); 14226497Sache 14326497Sache if (! (dt_ptm && dt_arp && dt_icmp && dt_ip && dt_tcp && 14426497Sache dt_udp && dt_rawip && dt_unix_dgram && 14526497Sache dt_unix_stream && dt_unix_ord_stream)) { 14626497Sache printf("WARNING: device config for STREAMS failed\n"); 14726497Sache printf("Suggest unloading streams KLD\n"); 148 } 149 return 0; 150 case MOD_UNLOAD: 151 /* XXX should check to see if it's busy first */ 152 destroy_dev(dt_ptm); 153 destroy_dev(dt_arp); 154 destroy_dev(dt_icmp); 155 destroy_dev(dt_ip); 156 destroy_dev(dt_tcp); 157 destroy_dev(dt_udp); 158 destroy_dev(dt_rawip); 159 destroy_dev(dt_unix_dgram); 160 destroy_dev(dt_unix_stream); 161 destroy_dev(dt_unix_ord_stream); 162 163 return 0; 164 default: 165 return EOPNOTSUPP; 166 break; 167 } 168 return 0; 169} 170 171static moduledata_t streams_mod = { 172 "streams", 173 streams_modevent, 174 0 175}; 176DECLARE_MODULE(streams, streams_mod, SI_SUB_DRIVERS, SI_ORDER_ANY); 177MODULE_VERSION(streams, 1); 178 179/* 180 * We only need open() and close() routines. open() calls socreate() 181 * to allocate a "real" object behind the stream and mallocs some state 182 * info for use by the svr4 emulator; close() deallocates the state 183 * information and passes the underlying object to the normal socket close 184 * routine. 185 */ 186static int 187streamsopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 188{ 189 struct filedesc *fdp; 190 struct svr4_strm *st; 191 struct socket *so; 192 struct file *fp; 193 int family, type, protocol; 194 int error, fd; 195 196 if (td->td_dupfd >= 0) 197 return ENODEV; 198 199 switch (dev2unit(dev)) { 200 case dev_udp: 201 family = AF_INET; 202 type = SOCK_DGRAM; 203 protocol = IPPROTO_UDP; 204 break; 205 206 case dev_tcp: 207 family = AF_INET; 208 type = SOCK_STREAM; 209 protocol = IPPROTO_TCP; 210 break; 211 212 case dev_ip: 213 case dev_rawip: 214 family = AF_INET; 215 type = SOCK_RAW; 216 protocol = IPPROTO_IP; 217 break; 218 219 case dev_icmp: 220 family = AF_INET; 221 type = SOCK_RAW; 222 protocol = IPPROTO_ICMP; 223 break; 224 225 case dev_unix_dgram: 226 family = AF_LOCAL; 227 type = SOCK_DGRAM; 228 protocol = 0; 229 break; 230 231 case dev_unix_stream: 232 case dev_unix_ord_stream: 233 family = AF_LOCAL; 234 type = SOCK_STREAM; 235 protocol = 0; 236 break; 237 238 case dev_ptm: 239 return svr4_ptm_alloc(td); 240 241 default: 242 return EOPNOTSUPP; 243 } 244 245 fdp = td->td_proc->p_fd; 246 if ((error = falloc(td, &fp, &fd, 0)) != 0) 247 return error; 248 /* An extra reference on `fp' has been held for us by falloc(). */ 249 250 error = socreate(family, &so, type, protocol, td->td_ucred, td); 251 if (error) { 252 fdclose(fdp, fp, fd, td); 253 fdrop(fp, td); 254 return error; 255 } 256 257 finit(fp, FREAD | FWRITE, DTYPE_SOCKET, so, &svr4_netops); 258 259 /* 260 * Allocate a stream structure and attach it to this socket. 261 * We don't bother locking so_emuldata for SVR4 stream sockets as 262 * its value is constant for the lifetime of the stream once it 263 * is initialized here. 264 */ 265 st = malloc(sizeof(struct svr4_strm), M_TEMP, M_WAITOK); 266 st->s_family = so->so_proto->pr_domain->dom_family; 267 st->s_cmd = ~0; 268 st->s_afd = -1; 269 st->s_eventmask = 0; 270 so->so_emuldata = st; 271 272 fdrop(fp, td); 273 td->td_dupfd = fd; 274 return ENXIO; 275} 276 277static int 278svr4_ptm_alloc(td) 279 struct thread *td; 280{ 281 /* 282 * XXX this is very, very ugly. But I can't find a better 283 * way that won't duplicate a big amount of code from 284 * sys_open(). Ho hum... 285 * 286 * Fortunately for us, Solaris (at least 2.5.1) makes the 287 * /dev/ptmx open automatically just open a pty, that (after 288 * STREAMS I_PUSHes), is just a plain pty. fstat() is used 289 * to get the minor device number to map to a tty. 290 * 291 * Cycle through the names. If sys_open() returns ENOENT (or 292 * ENXIO), short circuit the cycle and exit. 293 * 294 * XXX: Maybe this can now be implemented by posix_openpt()? 295 */ 296 static char ptyname[] = "/dev/ptyXX"; 297 static char ttyletters[] = "pqrstuwxyzPQRST"; 298 static char ttynumbers[] = "0123456789abcdef"; 299 struct proc *p; 300 register_t fd; 301 int error, l, n; 302 303 fd = -1; 304 n = 0; 305 l = 0; 306 p = td->td_proc; 307 while (fd == -1) { 308 ptyname[8] = ttyletters[l]; 309 ptyname[9] = ttynumbers[n]; 310 311 error = kern_open(td, ptyname, UIO_SYSSPACE, O_RDWR, 0); 312 switch (error) { 313 case ENOENT: 314 case ENXIO: 315 return error; 316 case 0: 317 td->td_dupfd = td->td_retval[0]; 318 return ENXIO; 319 default: 320 if (ttynumbers[++n] == '\0') { 321 if (ttyletters[++l] == '\0') 322 break; 323 n = 0; 324 } 325 } 326 } 327 return ENOENT; 328} 329 330 331struct svr4_strm * 332svr4_stream_get(fp) 333 struct file *fp; 334{ 335 struct socket *so; 336 337 if (fp == NULL || fp->f_type != DTYPE_SOCKET) 338 return NULL; 339 340 so = fp->f_data; 341 return so->so_emuldata; 342} 343 344static int 345svr4_soo_close(struct file *fp, struct thread *td) 346{ 347 struct socket *so = fp->f_data; 348 349 /* CHECKUNIT_DIAG(ENXIO);*/ 350 351 svr4_delete_socket(td->td_proc, fp); 352 free(so->so_emuldata, M_TEMP); 353 return soo_close(fp, td); 354} 355