uipc_syscalls_43.c revision 1.28
1 /* $NetBSD: uipc_syscalls_43.c,v 1.28 2007/03/04 06:01:13 christos 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 1.28 2007/03/04 06:01:13 christos 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 <compat/sys/socket.h> 59 #include <net/if.h> 60 61 #include <compat/common/compat_util.h> 62 63 #include <uvm/uvm_extern.h> 64 65 /* 66 * Following 4.3 syscalls were not versioned, even through they should 67 * have been: 68 * connect(2), bind(2), sendto(2) 69 */ 70 71 static int compat_43_sa_put(void *); 72 73 int 74 compat_43_sys_accept(struct lwp *l, void *v, register_t *retval) 75 { 76 struct compat_43_sys_accept_args /* { 77 syscallarg(int) s; 78 syscallarg(void *) name; 79 syscallarg(int *) anamelen; 80 } */ *uap = v; 81 int error; 82 83 if ((error = sys_accept(l, v, retval)) != 0) 84 return error; 85 86 if (SCARG(uap, name) 87 && (error = compat_43_sa_put(SCARG(uap, name)))) 88 return (error); 89 90 return 0; 91 } 92 93 int 94 compat_43_sys_getpeername(struct lwp *l, void *v, register_t *retval) 95 { 96 struct compat_43_sys_getpeername_args /* { 97 syscallarg(int) fdes; 98 syscallarg(void *) asa; 99 syscallarg(int *) alen; 100 } */ *uap = v; 101 102 int error; 103 104 if ((error = sys_getpeername(l, v, retval)) != 0) 105 return error; 106 107 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 108 return (error); 109 110 return 0; 111 } 112 113 int 114 compat_43_sys_getsockname(struct lwp *l, void *v, register_t *retval) 115 { 116 struct compat_43_sys_getsockname_args /* { 117 syscallarg(int) fdes; 118 syscallarg(void *) asa; 119 syscallarg(int *) alen; 120 } */ *uap = v; 121 int error; 122 123 if ((error = sys_getsockname(l, v, retval)) != 0) 124 return error; 125 126 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 127 return (error); 128 129 return 0; 130 } 131 132 int 133 compat_43_sys_recv(struct lwp *l, void *v, register_t *retval) 134 { 135 struct compat_43_sys_recv_args /* { 136 syscallarg(int) s; 137 syscallarg(void *) buf; 138 syscallarg(int) len; 139 syscallarg(int) flags; 140 } */ *uap = v; 141 struct sys_recvfrom_args bra; 142 143 SCARG(&bra, s) = SCARG(uap, s); 144 SCARG(&bra, buf) = SCARG(uap, buf); 145 SCARG(&bra, len) = (size_t) SCARG(uap, len); 146 SCARG(&bra, flags) = SCARG(uap, flags); 147 SCARG(&bra, from) = NULL; 148 SCARG(&bra, fromlenaddr) = NULL; 149 150 return (sys_recvfrom(l, &bra, retval)); 151 } 152 153 int 154 compat_43_sys_recvfrom(struct lwp *l, void *v, register_t *retval) 155 { 156 struct compat_43_sys_recvfrom_args /* { 157 syscallarg(int) s; 158 syscallarg(void *) buf; 159 syscallarg(size_t) len; 160 syscallarg(int) flags; 161 syscallarg(void *) from; 162 syscallarg(int *) fromlenaddr; 163 } */ *uap = v; 164 int error; 165 166 if ((error = sys_recvfrom(l, v, retval))) 167 return (error); 168 169 if (SCARG(uap, from) && (error = compat_43_sa_put(SCARG(uap, from)))) 170 return (error); 171 172 return (0); 173 } 174 175 /* 176 * Old recvmsg. Arrange necessary structures, calls generic code and 177 * adjusts results accordingly. 178 */ 179 int 180 compat_43_sys_recvmsg(struct lwp *l, void *v, register_t *retval) 181 { 182 struct compat_43_sys_recvmsg_args /* { 183 syscallarg(int) s; 184 syscallarg(struct omsghdr *) msg; 185 syscallarg(int) flags; 186 } */ *uap = v; 187 struct proc *p = l->l_proc; 188 struct omsghdr omsg; 189 struct msghdr msg; 190 struct iovec aiov[UIO_SMALLIOV], *iov; 191 int error; 192 193 error = copyin((void *)SCARG(uap, msg), (void *)&omsg, 194 sizeof (struct omsghdr)); 195 if (error) 196 return (error); 197 if ((u_int)omsg.msg_iovlen > UIO_SMALLIOV) { 198 if ((u_int)omsg.msg_iovlen > IOV_MAX) 199 return (EMSGSIZE); 200 iov = malloc(sizeof(struct iovec) * omsg.msg_iovlen, 201 M_IOV, M_WAITOK); 202 } else 203 iov = aiov; 204 205 error = copyin((void *)omsg.msg_iov, (void *)iov, 206 (unsigned)(omsg.msg_iovlen * sizeof (struct iovec))); 207 if (error) 208 goto done; 209 210 msg.msg_name = omsg.msg_name; 211 msg.msg_namelen = omsg.msg_namelen; 212 msg.msg_iovlen = omsg.msg_iovlen; 213 msg.msg_iov = iov; 214 msg.msg_flags = SCARG(uap, flags); 215 216 /* 217 * If caller passes accrights, arrange things for generic code to 218 * DTRT. 219 */ 220 if (omsg.msg_accrights && omsg.msg_accrightslen) { 221 void *sg = stackgap_init(p, 0); 222 struct cmsg *ucmsg; 223 224 /* it was this way in 4.4BSD */ 225 if ((u_int) omsg.msg_accrightslen > MLEN) 226 return (EINVAL); 227 228 ucmsg = stackgap_alloc(p, &sg, CMSG_SPACE(omsg.msg_accrightslen)); 229 if (ucmsg == NULL) 230 return (EMSGSIZE); 231 232 msg.msg_control = ucmsg; 233 msg.msg_controllen = CMSG_SPACE(omsg.msg_accrightslen); 234 } else { 235 msg.msg_control = NULL; 236 msg.msg_controllen = 0; 237 } 238 239 error = recvit(l, SCARG(uap, s), &msg, 240 (void *)&SCARG(uap, msg)->msg_namelen, retval); 241 242 /* 243 * If there is any control information and it's SCM_RIGHTS, 244 * pass it back to the program. 245 */ 246 if (!error && omsg.msg_accrights && msg.msg_controllen > 0) { 247 struct cmsghdr *cmsg; 248 249 /* safe - msg.msg_controllen set by kernel */ 250 cmsg = (struct cmsghdr *) malloc(msg.msg_controllen, 251 M_TEMP, M_WAITOK); 252 253 error = copyin(msg.msg_control, cmsg, msg.msg_controllen); 254 if (error) { 255 free(cmsg, M_TEMP); 256 return (error); 257 } 258 259 if (cmsg->cmsg_level != SOL_SOCKET 260 || cmsg->cmsg_type != SCM_RIGHTS 261 || copyout(CMSG_DATA(cmsg), omsg.msg_accrights, 262 cmsg->cmsg_len)) { 263 omsg.msg_accrightslen = 0; 264 } 265 266 free(cmsg, M_TEMP); 267 268 if (!error) { 269 error = copyout(&cmsg->cmsg_len, 270 &SCARG(uap, msg)->msg_accrightslen, sizeof(int)); 271 } 272 } 273 274 if (!error && omsg.msg_name) { 275 int namelen; 276 277 if ((error = copyin(&SCARG(uap, msg)->msg_namelen, &namelen, sizeof(int)) == 0) 278 && namelen > 0) 279 error = compat_43_sa_put(omsg.msg_name); 280 } 281 282 done: 283 if (iov != aiov) 284 free(iov, M_IOV); 285 return (error); 286 } 287 288 int 289 compat_43_sys_send(struct lwp *l, void *v, register_t *retval) 290 { 291 struct compat_43_sys_send_args /* { 292 syscallarg(int) s; 293 syscallarg(void *) buf; 294 syscallarg(int) len; 295 syscallarg(int) flags; 296 } */ *uap = v; 297 struct sys_sendto_args bsa; 298 299 SCARG(&bsa, s) = SCARG(uap, s); 300 SCARG(&bsa, buf) = SCARG(uap, buf); 301 SCARG(&bsa, len) = SCARG(uap, len); 302 SCARG(&bsa, flags) = SCARG(uap, flags); 303 SCARG(&bsa, to) = NULL; 304 SCARG(&bsa, tolen) = 0; 305 306 return (sys_sendto(l, &bsa, retval)); 307 } 308 309 /* 310 * Old sendmsg. Arrange necessary structures, call generic code and 311 * adjust the results accordingly for old code. 312 */ 313 int 314 compat_43_sys_sendmsg(struct lwp *l, void *v, register_t *retval) 315 { 316 struct compat_43_sys_sendmsg_args /* { 317 syscallarg(int) s; 318 syscallarg(void *) msg; 319 syscallarg(int) flags; 320 } */ *uap = v; 321 struct proc *p = l->l_proc; 322 struct omsghdr omsg; 323 struct msghdr msg; 324 struct iovec aiov[UIO_SMALLIOV], *iov; 325 int error; 326 void *sg = stackgap_init(p, 0); 327 328 error = copyin(SCARG(uap, msg), (void *)&omsg, 329 sizeof (struct omsghdr)); 330 if (error) 331 return (error); 332 if ((u_int)omsg.msg_iovlen > UIO_SMALLIOV) { 333 if ((u_int)omsg.msg_iovlen > IOV_MAX) 334 return (EMSGSIZE); 335 iov = malloc(sizeof(struct iovec) * omsg.msg_iovlen, 336 M_IOV, M_WAITOK); 337 } else 338 iov = aiov; 339 error = copyin((void *)omsg.msg_iov, (void *)iov, 340 (unsigned)(omsg.msg_iovlen * sizeof (struct iovec))); 341 if (error) 342 goto done; 343 344 if (omsg.msg_name) { 345 struct osockaddr *osa; 346 struct sockaddr *sa, *usa; 347 348 if ((u_int) omsg.msg_namelen > UCHAR_MAX) 349 return (EINVAL); 350 351 osa = malloc(omsg.msg_namelen, M_TEMP, M_WAITOK); 352 353 if ((error = copyin(omsg.msg_name, osa, omsg.msg_namelen))) { 354 free(osa, M_TEMP); 355 return (error); 356 } 357 358 sa = (struct sockaddr *) osa; 359 sa->sa_family = osa->sa_family; 360 sa->sa_len = omsg.msg_namelen; 361 362 usa = stackgap_alloc(p, &sg, omsg.msg_namelen); 363 if (!usa) { 364 free(osa, M_TEMP); 365 return (ENOMEM); 366 } 367 368 (void) copyout(sa, usa, omsg.msg_namelen); 369 free(osa, M_TEMP); 370 371 msg.msg_name = usa; 372 msg.msg_namelen = omsg.msg_namelen; 373 } else { 374 msg.msg_name = NULL; 375 msg.msg_namelen = 0; 376 } 377 msg.msg_iovlen = omsg.msg_iovlen; 378 msg.msg_iov = iov; 379 msg.msg_flags = 0; 380 381 if (omsg.msg_accrights && omsg.msg_accrightslen != 0) { 382 struct cmsghdr *cmsg, *ucmsg; 383 384 /* it was this way in 4.4BSD */ 385 if ((u_int) omsg.msg_accrightslen > MLEN) 386 return (EINVAL); 387 388 cmsg = malloc(CMSG_SPACE(omsg.msg_accrightslen), M_TEMP, 389 M_WAITOK); 390 cmsg->cmsg_len = CMSG_SPACE(omsg.msg_accrightslen); 391 cmsg->cmsg_level = SOL_SOCKET; 392 cmsg->cmsg_type = SCM_RIGHTS; 393 394 error = copyin(omsg.msg_accrights, CMSG_DATA(cmsg), 395 omsg.msg_accrightslen); 396 if (error) { 397 free(cmsg, M_TEMP); 398 return (error); 399 } 400 401 ucmsg = stackgap_alloc(p, &sg, CMSG_SPACE(omsg.msg_accrightslen)); 402 if (!ucmsg) { 403 free(cmsg, M_TEMP); 404 return (EMSGSIZE); 405 } 406 407 (void) copyout(cmsg, ucmsg, CMSG_SPACE(omsg.msg_accrightslen)); 408 free(cmsg, M_TEMP); 409 410 msg.msg_control = ucmsg; 411 msg.msg_controllen = CMSG_SPACE(omsg.msg_accrightslen); 412 } else { 413 msg.msg_control = NULL; 414 msg.msg_controllen = 0; 415 } 416 417 error = sendit(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 418 done: 419 if (iov != aiov) 420 FREE(iov, M_IOV); 421 return (error); 422 } 423 424 static int 425 compat_43_sa_put(from) 426 void *from; 427 { 428 struct osockaddr *osa = (struct osockaddr *) from; 429 struct sockaddr sa; 430 struct osockaddr *kosa; 431 int error, len; 432 433 /* 434 * Only read/write the sockaddr family and length, the rest is 435 * not changed. 436 */ 437 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 438 439 error = copyin((void *) osa, (void *) &sa, len); 440 if (error) 441 return (error); 442 443 /* Note: we convert from sockaddr sa_family to osockaddr one here */ 444 kosa = (struct osockaddr *) &sa; 445 kosa->sa_family = sa.sa_family; 446 error = copyout(kosa, osa, len); 447 if (error) 448 return (error); 449 450 return (0); 451 } 452 453 int 454 compat_ifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l) 455 { 456 int error, ocmd = cmd; 457 struct ifreq *ifr = (struct ifreq *)data; 458 struct ifnet *ifp = ifunit(ifr->ifr_name); 459 460 if (ifp == NULL) 461 return ENXIO; 462 463 switch (cmd) { 464 case SIOCSIFADDR: 465 case SIOCSIFDSTADDR: 466 case SIOCSIFBRDADDR: 467 case SIOCSIFNETMASK: 468 #if BYTE_ORDER != BIG_ENDIAN 469 if (ifr->ifr_addr.sa_family == 0 && 470 ifr->ifr_addr.sa_len < 16) { 471 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 472 ifr->ifr_addr.sa_len = 16; 473 } 474 #else 475 if (ifr->ifr_addr.sa_len == 0) 476 ifr->ifr_addr.sa_len = 16; 477 #endif 478 break; 479 480 case OSIOCGIFADDR: 481 cmd = SIOCGIFADDR; 482 break; 483 484 case OSIOCGIFDSTADDR: 485 cmd = SIOCGIFDSTADDR; 486 break; 487 488 case OSIOCGIFBRDADDR: 489 cmd = SIOCGIFBRDADDR; 490 break; 491 492 case OSIOCGIFNETMASK: 493 cmd = SIOCGIFNETMASK; 494 } 495 496 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 497 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)ifp, l); 498 499 switch (ocmd) { 500 case OSIOCGIFADDR: 501 case OSIOCGIFDSTADDR: 502 case OSIOCGIFBRDADDR: 503 case OSIOCGIFNETMASK: 504 *(u_int16_t *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 505 } 506 return error; 507 } 508
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