uipc_syscalls_43.c revision 1.35
1 /* $NetBSD: uipc_syscalls_43.c,v 1.35 2007/08/20 17:48:17 martin Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1990, 1993 5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: uipc_syscalls_43.c,v 1.35 2007/08/20 17:48:17 martin Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/filedesc.h> 40 #include <sys/kernel.h> 41 #include <sys/proc.h> 42 #include <sys/file.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 #include <sys/stat.h> 46 #include <sys/ioctl.h> 47 #include <sys/fcntl.h> 48 #include <sys/malloc.h> 49 #include <sys/syslog.h> 50 #include <sys/unistd.h> 51 #include <sys/resourcevar.h> 52 #include <sys/mbuf.h> /* for MLEN */ 53 #include <sys/protosw.h> 54 55 #include <sys/mount.h> 56 #include <sys/syscallargs.h> 57 58 #include <net/if.h> 59 #include <net/bpf.h> 60 #include <net/route.h> 61 #include <netinet/in.h> 62 #include <netinet/in_systm.h> 63 #include <netinet/ip.h> 64 #include <net/if_gre.h> 65 #include <net/if_atm.h> 66 #include <net/if_tap.h> 67 #include <netinet6/in6_var.h> 68 #include <netinet6/nd6.h> 69 #include <compat/sys/socket.h> 70 #include <compat/sys/sockio.h> 71 72 #include <compat/common/compat_util.h> 73 74 #include <uvm/uvm_extern.h> 75 76 /* 77 * Following 4.3 syscalls were not versioned, even through they should 78 * have been: 79 * connect(2), bind(2), sendto(2) 80 */ 81 82 static int compat_43_sa_put(void *); 83 84 int 85 compat_43_sys_accept(struct lwp *l, void *v, register_t *retval) 86 { 87 struct compat_43_sys_accept_args /* { 88 syscallarg(int) s; 89 syscallarg(void *) name; 90 syscallarg(int *) anamelen; 91 } */ *uap = v; 92 int error; 93 94 if ((error = sys_accept(l, v, retval)) != 0) 95 return error; 96 97 if (SCARG(uap, name) 98 && (error = compat_43_sa_put(SCARG(uap, name)))) 99 return (error); 100 101 return 0; 102 } 103 104 int 105 compat_43_sys_getpeername(struct lwp *l, void *v, register_t *retval) 106 { 107 struct compat_43_sys_getpeername_args /* { 108 syscallarg(int) fdes; 109 syscallarg(void *) asa; 110 syscallarg(int *) alen; 111 } */ *uap = v; 112 113 int error; 114 115 if ((error = sys_getpeername(l, v, retval)) != 0) 116 return error; 117 118 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 119 return (error); 120 121 return 0; 122 } 123 124 int 125 compat_43_sys_getsockname(struct lwp *l, void *v, register_t *retval) 126 { 127 struct compat_43_sys_getsockname_args /* { 128 syscallarg(int) fdes; 129 syscallarg(void *) asa; 130 syscallarg(int *) alen; 131 } */ *uap = v; 132 int error; 133 134 if ((error = sys_getsockname(l, v, retval)) != 0) 135 return error; 136 137 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 138 return (error); 139 140 return 0; 141 } 142 143 int 144 compat_43_sys_recv(struct lwp *l, void *v, register_t *retval) 145 { 146 struct compat_43_sys_recv_args /* { 147 syscallarg(int) s; 148 syscallarg(void *) buf; 149 syscallarg(int) len; 150 syscallarg(int) flags; 151 } */ *uap = v; 152 struct sys_recvfrom_args bra; 153 154 SCARG(&bra, s) = SCARG(uap, s); 155 SCARG(&bra, buf) = SCARG(uap, buf); 156 SCARG(&bra, len) = (size_t) SCARG(uap, len); 157 SCARG(&bra, flags) = SCARG(uap, flags); 158 SCARG(&bra, from) = NULL; 159 SCARG(&bra, fromlenaddr) = NULL; 160 161 return (sys_recvfrom(l, &bra, retval)); 162 } 163 164 int 165 compat_43_sys_recvfrom(struct lwp *l, void *v, register_t *retval) 166 { 167 struct compat_43_sys_recvfrom_args /* { 168 syscallarg(int) s; 169 syscallarg(void *) buf; 170 syscallarg(size_t) len; 171 syscallarg(int) flags; 172 syscallarg(void *) from; 173 syscallarg(int *) fromlenaddr; 174 } */ *uap = v; 175 int error; 176 177 if ((error = sys_recvfrom(l, v, retval))) 178 return (error); 179 180 if (SCARG(uap, from) && (error = compat_43_sa_put(SCARG(uap, from)))) 181 return (error); 182 183 return (0); 184 } 185 186 /* 187 * Old recvmsg. Arrange necessary structures, calls generic code and 188 * adjusts results accordingly. 189 */ 190 int 191 compat_43_sys_recvmsg(struct lwp *l, void *v, register_t *retval) 192 { 193 struct compat_43_sys_recvmsg_args /* { 194 syscallarg(int) s; 195 syscallarg(struct omsghdr *) msg; 196 syscallarg(int) flags; 197 } */ *uap = v; 198 struct omsghdr omsg; 199 struct msghdr msg; 200 struct mbuf *from, *control; 201 int error; 202 203 error = copyin(SCARG(uap, msg), &omsg, sizeof (struct omsghdr)); 204 if (error) 205 return (error); 206 207 if (omsg.msg_accrights == NULL) 208 omsg.msg_accrightslen = 0; 209 /* it was this way in 4.4BSD */ 210 if (omsg.msg_accrightslen > MLEN) 211 return EINVAL; 212 213 msg.msg_name = omsg.msg_name; 214 msg.msg_namelen = omsg.msg_namelen; 215 msg.msg_iovlen = omsg.msg_iovlen; 216 msg.msg_iov = omsg.msg_iov; 217 msg.msg_flags = (SCARG(uap, flags) & MSG_USERFLAGS) | MSG_IOVUSRSPACE; 218 219 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 220 omsg.msg_accrights != NULL ? &control : NULL, retval); 221 if (error != 0) 222 return error; 223 224 /* 225 * If there is any control information and it's SCM_RIGHTS, 226 * pass it back to the program. 227 * XXX: maybe there can be more than one chunk of control data? 228 */ 229 if (omsg.msg_accrights && control != NULL) { 230 struct cmsghdr *cmsg = mtod(control, void *); 231 232 if (cmsg->cmsg_level == SOL_SOCKET 233 && cmsg->cmsg_type == SCM_RIGHTS 234 && cmsg->cmsg_len < omsg.msg_accrightslen 235 && copyout(CMSG_DATA(cmsg), omsg.msg_accrights, 236 cmsg->cmsg_len) == 0) { 237 omsg.msg_accrightslen = cmsg->cmsg_len; 238 free_control_mbuf(l, control, control->m_next); 239 } else { 240 omsg.msg_accrightslen = 0; 241 free_control_mbuf(l, control, control); 242 } 243 } else 244 omsg.msg_accrightslen = 0; 245 246 if (from != NULL) 247 /* convert from sockaddr sa_family to osockaddr one here */ 248 mtod(from, struct osockaddr *)->sa_family = 249 mtod(from, struct sockaddr *)->sa_family; 250 251 error = copyout_sockname(omsg.msg_name, &omsg.msg_namelen, 0, from); 252 if (from != NULL) 253 m_free(from); 254 255 if (error != 0) 256 error = copyout(&omsg, SCARG(uap, msg), sizeof(omsg)); 257 258 return error; 259 } 260 261 int 262 compat_43_sys_send(struct lwp *l, void *v, register_t *retval) 263 { 264 struct compat_43_sys_send_args /* { 265 syscallarg(int) s; 266 syscallarg(void *) buf; 267 syscallarg(int) len; 268 syscallarg(int) flags; 269 } */ *uap = v; 270 struct sys_sendto_args bsa; 271 272 SCARG(&bsa, s) = SCARG(uap, s); 273 SCARG(&bsa, buf) = SCARG(uap, buf); 274 SCARG(&bsa, len) = SCARG(uap, len); 275 SCARG(&bsa, flags) = SCARG(uap, flags); 276 SCARG(&bsa, to) = NULL; 277 SCARG(&bsa, tolen) = 0; 278 279 return (sys_sendto(l, &bsa, retval)); 280 } 281 282 int 283 compat43_set_accrights(struct msghdr *msg, void *accrights, int accrightslen) 284 { 285 struct cmsghdr *cmsg; 286 int error; 287 struct mbuf *ctl; 288 u_int clen; 289 290 if (accrights == NULL || accrightslen == 0) { 291 msg->msg_control = NULL; 292 msg->msg_controllen = 0; 293 return 0; 294 } 295 296 clen = CMSG_SPACE(accrightslen); 297 /* it was (almost) this way in 4.4BSD */ 298 if (accrightslen < 0 || clen > MLEN) 299 return EINVAL; 300 301 ctl = m_get(M_WAIT, MT_CONTROL); 302 ctl->m_len = clen; 303 cmsg = mtod(ctl, void *); 304 cmsg->cmsg_len = CMSG_SPACE(accrightslen); 305 cmsg->cmsg_level = SOL_SOCKET; 306 cmsg->cmsg_type = SCM_RIGHTS; 307 308 error = copyin(accrights, CMSG_DATA(cmsg), accrightslen); 309 if (error) { 310 m_free(ctl); 311 return error; 312 } 313 314 msg->msg_control = ctl; 315 msg->msg_controllen = clen; 316 msg->msg_flags |= MSG_CONTROLMBUF; 317 return 0; 318 } 319 320 /* 321 * Old sendmsg. Arrange necessary structures, call generic code and 322 * adjust the results accordingly for old code. 323 */ 324 int 325 compat_43_sys_sendmsg(struct lwp *l, void *v, register_t *retval) 326 { 327 struct compat_43_sys_sendmsg_args /* { 328 syscallarg(int) s; 329 syscallarg(void *) msg; 330 syscallarg(int) flags; 331 } */ *uap = v; 332 struct omsghdr omsg; 333 struct msghdr msg; 334 int error; 335 struct mbuf *nam; 336 struct osockaddr *osa; 337 struct sockaddr *sa; 338 339 error = copyin(SCARG(uap, msg), &omsg, sizeof (struct omsghdr)); 340 if (error != 0) 341 return (error); 342 343 msg.msg_iovlen = omsg.msg_iovlen; 344 msg.msg_iov = omsg.msg_iov; 345 346 error = sockargs(&nam, omsg.msg_name, omsg.msg_namelen, MT_SONAME); 347 if (error != 0) 348 return (error); 349 350 sa = mtod(nam, void *); 351 osa = mtod(nam, void *); 352 sa->sa_family = osa->sa_family; 353 sa->sa_len = omsg.msg_namelen; 354 355 msg.msg_flags = MSG_IOVUSRSPACE | MSG_NAMEMBUF; 356 357 msg.msg_name = nam; 358 msg.msg_namelen = omsg.msg_namelen; 359 error = compat43_set_accrights(&msg, omsg.msg_accrights, 360 omsg.msg_accrightslen); 361 if (error != 0) 362 goto bad; 363 364 return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 365 366 bad: 367 if (nam != NULL) 368 m_free(nam); 369 370 return (error); 371 } 372 373 static int 374 compat_43_sa_put(from) 375 void *from; 376 { 377 struct osockaddr *osa = (struct osockaddr *) from; 378 struct sockaddr sa; 379 struct osockaddr *kosa; 380 int error, len; 381 382 /* 383 * Only read/write the sockaddr family and length, the rest is 384 * not changed. 385 */ 386 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 387 388 error = copyin((void *) osa, (void *) &sa, len); 389 if (error) 390 return (error); 391 392 /* Note: we convert from sockaddr sa_family to osockaddr one here */ 393 kosa = (struct osockaddr *) &sa; 394 kosa->sa_family = sa.sa_family; 395 error = copyout(kosa, osa, len); 396 if (error) 397 return (error); 398 399 return (0); 400 } 401 402 u_long 403 compat_cvtcmd(u_long cmd) 404 { 405 u_long ncmd; 406 407 if (IOCPARM_LEN(cmd) != sizeof(struct oifreq)) 408 return cmd; 409 410 ncmd = ((cmd) & ~(IOCPARM_MASK << IOCPARM_SHIFT)) | 411 (sizeof(struct ifreq) << IOCPARM_SHIFT); 412 413 switch (ncmd) { 414 case BIOCGETIF: 415 case BIOCSETIF: 416 case GREDSOCK: 417 case GREGADDRD: 418 case GREGADDRS: 419 case GREGPROTO: 420 case GRESADDRD: 421 case GRESADDRS: 422 case GRESPROTO: 423 case GRESSOCK: 424 case OBIOCGETIF: 425 case OOSIOCGIFADDR: 426 case OOSIOCGIFBRDADDR: 427 case OOSIOCGIFCONF: 428 case OOSIOCGIFDSTADDR: 429 case OOSIOCGIFNETMASK: 430 case OSIOCADDMULTI: 431 case OSIOCDELMULTI: 432 case OSIOCGIFFLAGS: 433 case OSIOCSIFADDR: 434 case OSIOCSIFBRDADDR: 435 case OSIOCSIFDSTADDR: 436 case OSIOCSIFFLAGS: 437 case OSIOCSIFMEDIA: 438 case OSIOCSIFNETMASK: 439 case OTAPGIFNAME: 440 case SIOCADDMULTI: 441 case SIOCDELMULTI: 442 case SIOCDIFADDR: 443 case SIOCDIFADDR_IN6: 444 case SIOCDIFPHYADDR: 445 case SIOCGDEFIFACE_IN6: 446 case SIOCGIFADDR: 447 case SIOCGIFADDR_IN6: 448 case SIOCGIFAFLAG_IN6: 449 case SIOCGIFALIFETIME_IN6: 450 case SIOCGIFBRDADDR: 451 case SIOCGIFDLT: 452 case SIOCGIFDSTADDR: 453 case SIOCGIFDSTADDR_IN6: 454 case SIOCGIFFLAGS: 455 case SIOCGIFGENERIC: 456 case SIOCGIFMETRIC: 457 case SIOCGIFMTU: 458 case SIOCGIFNETMASK: 459 case SIOCGIFNETMASK_IN6: 460 case SIOCGIFPDSTADDR: 461 case SIOCGIFPDSTADDR_IN6: 462 case SIOCGIFPSRCADDR: 463 case SIOCGIFPSRCADDR_IN6: 464 case SIOCGIFSTAT_ICMP6: 465 case SIOCGIFSTAT_IN6: 466 case SIOCGPVCSIF: 467 case SIOCGVH: 468 case SIOCIFCREATE: 469 case SIOCIFDESTROY: 470 case SIOCSDEFIFACE_IN6: 471 case SIOCSIFADDR: 472 case SIOCSIFADDR_IN6: 473 case SIOCSIFALIFETIME_IN6: 474 case SIOCSIFBRDADDR: 475 case SIOCSIFDSTADDR: 476 case SIOCSIFDSTADDR_IN6: 477 case SIOCSIFFLAGS: 478 case SIOCSIFGENERIC: 479 case SIOCSIFMEDIA: 480 case SIOCSIFMETRIC: 481 case SIOCSIFMTU: 482 case SIOCSIFNETMASK: 483 case SIOCSIFNETMASK_IN6: 484 case SIOCSNDFLUSH_IN6: 485 case SIOCSPFXFLUSH_IN6: 486 case SIOCSPVCSIF: 487 case SIOCSRTRFLUSH_IN6: 488 case SIOCSVH: 489 case TAPGIFNAME: 490 case OBIOCSETIF: 491 case OSIOCGIFCONF: 492 return ncmd; 493 } 494 return cmd; 495 } 496 497 int 498 compat_ifioctl(struct socket *so, u_long ocmd, u_long cmd, void *data, 499 struct lwp *l) 500 { 501 int error; 502 struct ifreq *ifr = data; 503 struct ifnet *ifp = ifunit(ifr->ifr_name); 504 struct sockaddr *sa; 505 506 if (ifp == NULL) 507 return ENXIO; 508 509 switch (ocmd) { 510 case OSIOCSIFADDR: 511 case OSIOCSIFDSTADDR: 512 case OSIOCSIFBRDADDR: 513 case OSIOCSIFNETMASK: 514 sa = &ifr->ifr_addr; 515 #if BYTE_ORDER != BIG_ENDIAN 516 if (sa->sa_family == 0 && sa->sa_len < 16) { 517 sa->sa_family = sa->sa_len; 518 sa->sa_len = 16; 519 } 520 #else 521 if (sa->sa_len == 0) 522 sa->sa_len = 16; 523 #endif 524 break; 525 526 case OOSIOCGIFADDR: 527 cmd = SIOCGIFADDR; 528 break; 529 530 case OOSIOCGIFDSTADDR: 531 cmd = SIOCGIFDSTADDR; 532 break; 533 534 case OOSIOCGIFBRDADDR: 535 cmd = SIOCGIFBRDADDR; 536 break; 537 538 case OOSIOCGIFNETMASK: 539 cmd = SIOCGIFNETMASK; 540 } 541 542 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 543 (struct mbuf *)cmd, (struct mbuf *)ifr, (struct mbuf *)ifp, l); 544 545 switch (ocmd) { 546 case OOSIOCGIFADDR: 547 case OOSIOCGIFDSTADDR: 548 case OOSIOCGIFBRDADDR: 549 case OOSIOCGIFNETMASK: 550 *(u_int16_t *)&ifr->ifr_addr = 551 ((struct sockaddr *)&ifr->ifr_addr)->sa_family; 552 } 553 return error; 554 } 555
Indexes created Sat Sep 27 22:09:54 GMT 2025