uipc_syscalls_43.c revision 1.34
1 /* $NetBSD: uipc_syscalls_43.c,v 1.34 2007/08/20 16:52:59 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 1.34 2007/08/20 16:52:59 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 <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 omsghdr omsg; 189 struct msghdr msg; 190 struct mbuf *from, *control; 191 int error; 192 193 error = copyin(SCARG(uap, msg), &omsg, sizeof (struct omsghdr)); 194 if (error) 195 return (error); 196 197 if (omsg.msg_accrights == NULL) 198 omsg.msg_accrightslen = 0; 199 /* it was this way in 4.4BSD */ 200 if (omsg.msg_accrightslen > MLEN) 201 return EINVAL; 202 203 msg.msg_name = omsg.msg_name; 204 msg.msg_namelen = omsg.msg_namelen; 205 msg.msg_iovlen = omsg.msg_iovlen; 206 msg.msg_iov = omsg.msg_iov; 207 msg.msg_flags = (SCARG(uap, flags) & MSG_USERFLAGS) | MSG_IOVUSRSPACE; 208 209 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 210 omsg.msg_accrights != NULL ? &control : NULL, retval); 211 if (error != 0) 212 return error; 213 214 /* 215 * If there is any control information and it's SCM_RIGHTS, 216 * pass it back to the program. 217 * XXX: maybe there can be more than one chunk of control data? 218 */ 219 if (omsg.msg_accrights && control != NULL) { 220 struct cmsghdr *cmsg = mtod(control, void *); 221 222 if (cmsg->cmsg_level == SOL_SOCKET 223 && cmsg->cmsg_type == SCM_RIGHTS 224 && cmsg->cmsg_len < omsg.msg_accrightslen 225 && copyout(CMSG_DATA(cmsg), omsg.msg_accrights, 226 cmsg->cmsg_len) == 0) { 227 omsg.msg_accrightslen = cmsg->cmsg_len; 228 free_control_mbuf(l, control, control->m_next); 229 } else { 230 omsg.msg_accrightslen = 0; 231 free_control_mbuf(l, control, control); 232 } 233 } else 234 omsg.msg_accrightslen = 0; 235 236 if (from != NULL) 237 /* convert from sockaddr sa_family to osockaddr one here */ 238 mtod(from, struct osockaddr *)->sa_family = 239 mtod(from, struct sockaddr *)->sa_family; 240 241 error = copyout_sockname(omsg.msg_name, &omsg.msg_namelen, 0, from); 242 if (from != NULL) 243 m_free(from); 244 245 if (error != 0) 246 error = copyout(&omsg, SCARG(uap, msg), sizeof(omsg)); 247 248 return error; 249 } 250 251 int 252 compat_43_sys_send(struct lwp *l, void *v, register_t *retval) 253 { 254 struct compat_43_sys_send_args /* { 255 syscallarg(int) s; 256 syscallarg(void *) buf; 257 syscallarg(int) len; 258 syscallarg(int) flags; 259 } */ *uap = v; 260 struct sys_sendto_args bsa; 261 262 SCARG(&bsa, s) = SCARG(uap, s); 263 SCARG(&bsa, buf) = SCARG(uap, buf); 264 SCARG(&bsa, len) = SCARG(uap, len); 265 SCARG(&bsa, flags) = SCARG(uap, flags); 266 SCARG(&bsa, to) = NULL; 267 SCARG(&bsa, tolen) = 0; 268 269 return (sys_sendto(l, &bsa, retval)); 270 } 271 272 int 273 compat43_set_accrights(struct msghdr *msg, void *accrights, int accrightslen) 274 { 275 struct cmsghdr *cmsg; 276 int error; 277 struct mbuf *ctl; 278 u_int clen; 279 280 if (accrights == NULL || accrightslen == 0) { 281 msg->msg_control = NULL; 282 msg->msg_controllen = 0; 283 return 0; 284 } 285 286 clen = CMSG_SPACE(accrightslen); 287 /* it was (almost) this way in 4.4BSD */ 288 if (accrightslen < 0 || clen > MLEN) 289 return EINVAL; 290 291 ctl = m_get(M_WAIT, MT_CONTROL); 292 ctl->m_len = clen; 293 cmsg = mtod(ctl, void *); 294 cmsg->cmsg_len = CMSG_SPACE(accrightslen); 295 cmsg->cmsg_level = SOL_SOCKET; 296 cmsg->cmsg_type = SCM_RIGHTS; 297 298 error = copyin(accrights, CMSG_DATA(cmsg), accrightslen); 299 if (error) { 300 m_free(ctl); 301 return error; 302 } 303 304 msg->msg_control = ctl; 305 msg->msg_controllen = clen; 306 msg->msg_flags |= MSG_CONTROLMBUF; 307 return 0; 308 } 309 310 /* 311 * Old sendmsg. Arrange necessary structures, call generic code and 312 * adjust the results accordingly for old code. 313 */ 314 int 315 compat_43_sys_sendmsg(struct lwp *l, void *v, register_t *retval) 316 { 317 struct compat_43_sys_sendmsg_args /* { 318 syscallarg(int) s; 319 syscallarg(void *) msg; 320 syscallarg(int) flags; 321 } */ *uap = v; 322 struct omsghdr omsg; 323 struct msghdr msg; 324 int error; 325 struct mbuf *nam; 326 struct osockaddr *osa; 327 struct sockaddr *sa; 328 329 error = copyin(SCARG(uap, msg), &omsg, sizeof (struct omsghdr)); 330 if (error != 0) 331 return (error); 332 333 msg.msg_iovlen = omsg.msg_iovlen; 334 msg.msg_iov = omsg.msg_iov; 335 336 error = sockargs(&nam, omsg.msg_name, omsg.msg_namelen, MT_SONAME); 337 if (error != 0) 338 return (error); 339 340 sa = mtod(nam, void *); 341 osa = mtod(nam, void *); 342 sa->sa_family = osa->sa_family; 343 sa->sa_len = omsg.msg_namelen; 344 345 msg.msg_flags = MSG_IOVUSRSPACE | MSG_NAMEMBUF; 346 347 msg.msg_name = nam; 348 msg.msg_namelen = omsg.msg_namelen; 349 error = compat43_set_accrights(&msg, omsg.msg_accrights, 350 omsg.msg_accrightslen); 351 if (error != 0) 352 goto bad; 353 354 return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 355 356 bad: 357 if (nam != NULL) 358 m_free(nam); 359 360 return (error); 361 } 362 363 static int 364 compat_43_sa_put(from) 365 void *from; 366 { 367 struct osockaddr *osa = (struct osockaddr *) from; 368 struct sockaddr sa; 369 struct osockaddr *kosa; 370 int error, len; 371 372 /* 373 * Only read/write the sockaddr family and length, the rest is 374 * not changed. 375 */ 376 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 377 378 error = copyin((void *) osa, (void *) &sa, len); 379 if (error) 380 return (error); 381 382 /* Note: we convert from sockaddr sa_family to osockaddr one here */ 383 kosa = (struct osockaddr *) &sa; 384 kosa->sa_family = sa.sa_family; 385 error = copyout(kosa, osa, len); 386 if (error) 387 return (error); 388 389 return (0); 390 } 391 392 393 /* 394 * XXX: The following check depends on the fact that the only struct 395 * sized 0x20 bytes in the ifioctls is struct oifreq and struct ifcapreq. 396 * If that changes, then we'll need to use an explicit list here. 397 * (But the actual list is ~60 entries long and uses includes all over 398 * the tree...) 399 */ 400 u_long 401 compat_cvtcmd(u_long cmd) 402 { 403 u_long ncmd; 404 405 #define ifcapreq(x) ((x) == SIOCGIFCAP || (x) == SIOCSIFCAP) 406 407 ncmd = ((IOCPARM_LEN(cmd) == sizeof(struct oifreq) && !ifcapreq(cmd)) ? 408 ((cmd & ~(IOCPARM_MASK << IOCPARM_SHIFT)) | 409 (sizeof(struct ifreq) << IOCPARM_SHIFT)) : cmd); 410 411 return ncmd; 412 } 413 414 int 415 compat_ifioctl(struct socket *so, u_long ocmd, u_long cmd, void *data, 416 struct lwp *l) 417 { 418 int error; 419 struct ifreq *ifr = data; 420 struct ifnet *ifp = ifunit(ifr->ifr_name); 421 struct sockaddr *sa; 422 423 if (ifp == NULL) 424 return ENXIO; 425 426 switch (ocmd) { 427 case OSIOCSIFADDR: 428 case OSIOCSIFDSTADDR: 429 case OSIOCSIFBRDADDR: 430 case OSIOCSIFNETMASK: 431 sa = &ifr->ifr_addr; 432 #if BYTE_ORDER != BIG_ENDIAN 433 if (sa->sa_family == 0 && sa->sa_len < 16) { 434 sa->sa_family = sa->sa_len; 435 sa->sa_len = 16; 436 } 437 #else 438 if (sa->sa_len == 0) 439 sa->sa_len = 16; 440 #endif 441 break; 442 443 case OOSIOCGIFADDR: 444 cmd = SIOCGIFADDR; 445 break; 446 447 case OOSIOCGIFDSTADDR: 448 cmd = SIOCGIFDSTADDR; 449 break; 450 451 case OOSIOCGIFBRDADDR: 452 cmd = SIOCGIFBRDADDR; 453 break; 454 455 case OOSIOCGIFNETMASK: 456 cmd = SIOCGIFNETMASK; 457 } 458 459 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 460 (struct mbuf *)cmd, (struct mbuf *)ifr, (struct mbuf *)ifp, l); 461 462 switch (ocmd) { 463 case OOSIOCGIFADDR: 464 case OOSIOCGIFDSTADDR: 465 case OOSIOCGIFBRDADDR: 466 case OOSIOCGIFNETMASK: 467 *(u_int16_t *)&ifr->ifr_addr = 468 ((struct sockaddr *)&ifr->ifr_addr)->sa_family; 469 } 470 return error; 471 } 472
Indexes created Tue Sep 30 06:09:59 GMT 2025