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 67static int svr4_soo_close(struct file *, struct thread *); 68static int svr4_ptm_alloc(struct thread *); 69static d_open_t streamsopen; 70 71/* 72 * Device minor numbers 73 */ 74enum { 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 87static 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 90static struct fileops svr4_netops = { 91 .fo_read = soo_read, 92 .fo_write = soo_write, 93 .fo_truncate = soo_truncate, 94 .fo_ioctl = soo_ioctl, 95 .fo_poll = soo_poll, 96 .fo_kqfilter = soo_kqfilter, 97 .fo_stat = soo_stat, 98 .fo_close = svr4_soo_close, 99 .fo_chmod = invfo_chmod, 100 .fo_chown = invfo_chown, 101}; 102 103static struct cdevsw streams_cdevsw = { 104 .d_version = D_VERSION, 105 .d_open = streamsopen, 106 .d_name = "streams", 107}; 108 109struct streams_softc { 110 struct isa_device *dev; 111} ; 112 113#define UNIT(dev) dev2unit(dev) /* assume one minor number per unit */ 114 115typedef struct streams_softc *sc_p; 116 117static int 118streams_modevent(module_t mod, int type, void *unused) 119{ 120 switch (type) { 121 case MOD_LOAD: 122 dt_ptm = make_dev(&streams_cdevsw, dev_ptm, 0, 0, 0666, 123 "ptm"); 124 dt_arp = make_dev(&streams_cdevsw, dev_arp, 0, 0, 0666, 125 "arp"); 126 dt_icmp = make_dev(&streams_cdevsw, dev_icmp, 0, 0, 0666, 127 "icmp"); 128 dt_ip = make_dev(&streams_cdevsw, dev_ip, 0, 0, 0666, 129 "ip"); 130 dt_tcp = make_dev(&streams_cdevsw, dev_tcp, 0, 0, 0666, 131 "tcp"); 132 dt_udp = make_dev(&streams_cdevsw, dev_udp, 0, 0, 0666, 133 "udp"); 134 dt_rawip = make_dev(&streams_cdevsw, dev_rawip, 0, 0, 0666, 135 "rawip"); 136 dt_unix_dgram = make_dev(&streams_cdevsw, dev_unix_dgram, 137 0, 0, 0666, "ticlts"); 138 dt_unix_stream = make_dev(&streams_cdevsw, dev_unix_stream, 139 0, 0, 0666, "ticots"); 140 dt_unix_ord_stream = make_dev(&streams_cdevsw, 141 dev_unix_ord_stream, 0, 0, 0666, "ticotsord"); 142 143 if (! (dt_ptm && dt_arp && dt_icmp && dt_ip && dt_tcp && 144 dt_udp && dt_rawip && dt_unix_dgram && 145 dt_unix_stream && dt_unix_ord_stream)) { 146 printf("WARNING: device config for STREAMS failed\n"); 147 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