uipc_syscalls_43.c revision 1.30
1 /* $NetBSD: uipc_syscalls_43.c,v 1.30 2007/06/01 22:53:52 dsl 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 1.30 2007/06/01 22:53:52 dsl 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 <compat/sys/socket.h> 60 #include <compat/sys/sockio.h> 61 62 #include <compat/common/compat_util.h> 63 64 #include <uvm/uvm_extern.h> 65 66 /* 67 * Following 4.3 syscalls were not versioned, even through they should 68 * have been: 69 * connect(2), bind(2), sendto(2) 70 */ 71 72 static int compat_43_sa_put(void *); 73 74 int 75 compat_43_sys_accept(struct lwp *l, void *v, register_t *retval) 76 { 77 struct compat_43_sys_accept_args /* { 78 syscallarg(int) s; 79 syscallarg(void *) name; 80 syscallarg(int *) anamelen; 81 } */ *uap = v; 82 int error; 83 84 if ((error = sys_accept(l, v, retval)) != 0) 85 return error; 86 87 if (SCARG(uap, name) 88 && (error = compat_43_sa_put(SCARG(uap, name)))) 89 return (error); 90 91 return 0; 92 } 93 94 int 95 compat_43_sys_getpeername(struct lwp *l, void *v, register_t *retval) 96 { 97 struct compat_43_sys_getpeername_args /* { 98 syscallarg(int) fdes; 99 syscallarg(void *) asa; 100 syscallarg(int *) alen; 101 } */ *uap = v; 102 103 int error; 104 105 if ((error = sys_getpeername(l, v, retval)) != 0) 106 return error; 107 108 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 109 return (error); 110 111 return 0; 112 } 113 114 int 115 compat_43_sys_getsockname(struct lwp *l, void *v, register_t *retval) 116 { 117 struct compat_43_sys_getsockname_args /* { 118 syscallarg(int) fdes; 119 syscallarg(void *) asa; 120 syscallarg(int *) alen; 121 } */ *uap = v; 122 int error; 123 124 if ((error = sys_getsockname(l, v, retval)) != 0) 125 return error; 126 127 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 128 return (error); 129 130 return 0; 131 } 132 133 int 134 compat_43_sys_recv(struct lwp *l, void *v, register_t *retval) 135 { 136 struct compat_43_sys_recv_args /* { 137 syscallarg(int) s; 138 syscallarg(void *) buf; 139 syscallarg(int) len; 140 syscallarg(int) flags; 141 } */ *uap = v; 142 struct sys_recvfrom_args bra; 143 144 SCARG(&bra, s) = SCARG(uap, s); 145 SCARG(&bra, buf) = SCARG(uap, buf); 146 SCARG(&bra, len) = (size_t) SCARG(uap, len); 147 SCARG(&bra, flags) = SCARG(uap, flags); 148 SCARG(&bra, from) = NULL; 149 SCARG(&bra, fromlenaddr) = NULL; 150 151 return (sys_recvfrom(l, &bra, retval)); 152 } 153 154 int 155 compat_43_sys_recvfrom(struct lwp *l, void *v, register_t *retval) 156 { 157 struct compat_43_sys_recvfrom_args /* { 158 syscallarg(int) s; 159 syscallarg(void *) buf; 160 syscallarg(size_t) len; 161 syscallarg(int) flags; 162 syscallarg(void *) from; 163 syscallarg(int *) fromlenaddr; 164 } */ *uap = v; 165 int error; 166 167 if ((error = sys_recvfrom(l, v, retval))) 168 return (error); 169 170 if (SCARG(uap, from) && (error = compat_43_sa_put(SCARG(uap, from)))) 171 return (error); 172 173 return (0); 174 } 175 176 /* 177 * Old recvmsg. Arrange necessary structures, calls generic code and 178 * adjusts results accordingly. 179 */ 180 int 181 compat_43_sys_recvmsg(struct lwp *l, void *v, register_t *retval) 182 { 183 struct compat_43_sys_recvmsg_args /* { 184 syscallarg(int) s; 185 syscallarg(struct omsghdr *) msg; 186 syscallarg(int) flags; 187 } */ *uap = v; 188 struct proc *p = l->l_proc; 189 struct omsghdr omsg; 190 struct msghdr msg; 191 struct iovec aiov[UIO_SMALLIOV], *iov; 192 int error; 193 194 error = copyin((void *)SCARG(uap, msg), (void *)&omsg, 195 sizeof (struct omsghdr)); 196 if (error) 197 return (error); 198 if ((u_int)omsg.msg_iovlen > UIO_SMALLIOV) { 199 if ((u_int)omsg.msg_iovlen > IOV_MAX) 200 return (EMSGSIZE); 201 iov = malloc(sizeof(struct iovec) * omsg.msg_iovlen, 202 M_IOV, M_WAITOK); 203 } else 204 iov = aiov; 205 206 error = copyin((void *)omsg.msg_iov, (void *)iov, 207 (unsigned)(omsg.msg_iovlen * sizeof (struct iovec))); 208 if (error) 209 goto done; 210 211 msg.msg_name = omsg.msg_name; 212 msg.msg_namelen = omsg.msg_namelen; 213 msg.msg_iovlen = omsg.msg_iovlen; 214 msg.msg_iov = iov; 215 msg.msg_flags = SCARG(uap, flags); 216 217 /* 218 * If caller passes accrights, arrange things for generic code to 219 * DTRT. 220 */ 221 if (omsg.msg_accrights && omsg.msg_accrightslen) { 222 void *sg = stackgap_init(p, 0); 223 struct cmsg *ucmsg; 224 225 /* it was this way in 4.4BSD */ 226 if ((u_int) omsg.msg_accrightslen > MLEN) 227 return (EINVAL); 228 229 ucmsg = stackgap_alloc(p, &sg, CMSG_SPACE(omsg.msg_accrightslen)); 230 if (ucmsg == NULL) 231 return (EMSGSIZE); 232 233 msg.msg_control = ucmsg; 234 msg.msg_controllen = CMSG_SPACE(omsg.msg_accrightslen); 235 } else { 236 msg.msg_control = NULL; 237 msg.msg_controllen = 0; 238 } 239 240 error = recvit(l, SCARG(uap, s), &msg, 241 (void *)&SCARG(uap, msg)->msg_namelen, retval); 242 243 /* 244 * If there is any control information and it's SCM_RIGHTS, 245 * pass it back to the program. 246 */ 247 if (!error && omsg.msg_accrights && msg.msg_controllen > 0) { 248 struct cmsghdr *cmsg; 249 250 /* safe - msg.msg_controllen set by kernel */ 251 cmsg = malloc(msg.msg_controllen, 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 if (!error) { 267 error = copyout(&cmsg->cmsg_len, 268 &SCARG(uap, msg)->msg_accrightslen, sizeof(int)); 269 } 270 free(cmsg, M_TEMP); 271 } 272 273 if (!error && omsg.msg_name) { 274 int namelen; 275 276 if ((error = copyin(&SCARG(uap, msg)->msg_namelen, &namelen, sizeof(int)) == 0) 277 && namelen > 0) 278 error = compat_43_sa_put(omsg.msg_name); 279 } 280 281 done: 282 if (iov != aiov) 283 free(iov, M_IOV); 284 return (error); 285 } 286 287 int 288 compat_43_sys_send(struct lwp *l, void *v, register_t *retval) 289 { 290 struct compat_43_sys_send_args /* { 291 syscallarg(int) s; 292 syscallarg(void *) buf; 293 syscallarg(int) len; 294 syscallarg(int) flags; 295 } */ *uap = v; 296 struct sys_sendto_args bsa; 297 298 SCARG(&bsa, s) = SCARG(uap, s); 299 SCARG(&bsa, buf) = SCARG(uap, buf); 300 SCARG(&bsa, len) = SCARG(uap, len); 301 SCARG(&bsa, flags) = SCARG(uap, flags); 302 SCARG(&bsa, to) = NULL; 303 SCARG(&bsa, tolen) = 0; 304 305 return (sys_sendto(l, &bsa, retval)); 306 } 307 308 /* 309 * Old sendmsg. Arrange necessary structures, call generic code and 310 * adjust the results accordingly for old code. 311 */ 312 int 313 compat_43_sys_sendmsg(struct lwp *l, void *v, register_t *retval) 314 { 315 struct compat_43_sys_sendmsg_args /* { 316 syscallarg(int) s; 317 syscallarg(void *) msg; 318 syscallarg(int) flags; 319 } */ *uap = v; 320 struct omsghdr omsg; 321 struct msghdr msg; 322 int error; 323 struct mbuf *nam; 324 struct mbuf *ctl; 325 struct osockaddr *osa; 326 struct sockaddr *sa; 327 328 error = copyin(SCARG(uap, msg), &omsg, sizeof (struct omsghdr)); 329 if (error != 0) 330 return (error); 331 332 msg.msg_iovlen = omsg.msg_iovlen; 333 msg.msg_iov = omsg.msg_iov; 334 335 error = sockargs(&nam, omsg.msg_name, omsg.msg_namelen, MT_SONAME); 336 if (error != 0) 337 return (error); 338 339 sa = mtod(nam, void *); 340 osa = mtod(nam, void *); 341 sa->sa_family = osa->sa_family; 342 sa->sa_len = omsg.msg_namelen; 343 344 msg.msg_flags = MSG_IOVUSRSPACE | MSG_NAMEMBUF; 345 346 msg.msg_name = nam; 347 msg.msg_namelen = omsg.msg_namelen; 348 349 if (omsg.msg_accrights && omsg.msg_accrightslen != 0) { 350 struct cmsghdr *cmsg; 351 u_int clen; 352 353 clen = CMSG_SPACE(omsg.msg_accrightslen); 354 /* it was (almost) this way in 4.4BSD */ 355 if (omsg.msg_accrightslen < 0 || clen > MLEN) { 356 error = EINVAL; 357 goto bad; 358 } 359 360 ctl = m_get(M_WAIT, MT_CONTROL); 361 ctl->m_len = clen; 362 cmsg = mtod(ctl, void *); 363 cmsg->cmsg_len = CMSG_SPACE(omsg.msg_accrightslen); 364 cmsg->cmsg_level = SOL_SOCKET; 365 cmsg->cmsg_type = SCM_RIGHTS; 366 367 error = copyin(omsg.msg_accrights, CMSG_DATA(cmsg), 368 omsg.msg_accrightslen); 369 if (error) 370 goto bad; 371 372 msg.msg_control = ctl; 373 msg.msg_controllen = clen; 374 msg.msg_flags |= MSG_CONTROLMBUF; 375 } else { 376 msg.msg_control = NULL; 377 msg.msg_controllen = 0; 378 } 379 380 return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 381 382 bad: 383 if (nam != NULL) 384 m_free(nam); 385 386 return (error); 387 } 388 389 static int 390 compat_43_sa_put(from) 391 void *from; 392 { 393 struct osockaddr *osa = (struct osockaddr *) from; 394 struct sockaddr sa; 395 struct osockaddr *kosa; 396 int error, len; 397 398 /* 399 * Only read/write the sockaddr family and length, the rest is 400 * not changed. 401 */ 402 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 403 404 error = copyin((void *) osa, (void *) &sa, len); 405 if (error) 406 return (error); 407 408 /* Note: we convert from sockaddr sa_family to osockaddr one here */ 409 kosa = (struct osockaddr *) &sa; 410 kosa->sa_family = sa.sa_family; 411 error = copyout(kosa, osa, len); 412 if (error) 413 return (error); 414 415 return (0); 416 } 417 418 int 419 compat_ifioctl(struct socket *so, u_long ocmd, u_long cmd, void *data, 420 struct lwp *l) 421 { 422 int error; 423 struct ifreq *ifr = data; 424 struct ifnet *ifp = ifunit(ifr->ifr_name); 425 struct sockaddr *sa; 426 427 if (ifp == NULL) 428 return ENXIO; 429 430 switch (ocmd) { 431 case OSIOCSIFADDR: 432 case OSIOCSIFDSTADDR: 433 case OSIOCSIFBRDADDR: 434 case OSIOCSIFNETMASK: 435 sa = &ifr->ifr_addr; 436 #if BYTE_ORDER != BIG_ENDIAN 437 if (sa->sa_family == 0 && sa->sa_len < 16) { 438 sa->sa_family = sa->sa_len; 439 sa->sa_len = 16; 440 } 441 #else 442 if (sa->sa_len == 0) 443 sa->sa_len = 16; 444 #endif 445 break; 446 447 case OOSIOCGIFADDR: 448 cmd = SIOCGIFADDR; 449 break; 450 451 case OOSIOCGIFDSTADDR: 452 cmd = SIOCGIFDSTADDR; 453 break; 454 455 case OOSIOCGIFBRDADDR: 456 cmd = SIOCGIFBRDADDR; 457 break; 458 459 case OOSIOCGIFNETMASK: 460 cmd = SIOCGIFNETMASK; 461 } 462 463 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 464 (struct mbuf *)cmd, (struct mbuf *)ifr, (struct mbuf *)ifp, l); 465 466 switch (ocmd) { 467 case OOSIOCGIFADDR: 468 case OOSIOCGIFDSTADDR: 469 case OOSIOCGIFBRDADDR: 470 case OOSIOCGIFNETMASK: 471 *(u_int16_t *)&ifr->ifr_addr = 472 ((struct sockaddr *)&ifr->ifr_addr)->sa_family; 473 } 474 return error; 475 } 476
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