uipc_syscalls_43.c revision 1.22
1 /* $NetBSD: uipc_syscalls_43.c,v 1.22 2003/08/07 16:30:36 agc 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 1.22 2003/08/07 16:30:36 agc 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 54 #include <sys/mount.h> 55 #include <sys/sa.h> 56 #include <sys/syscallargs.h> 57 58 #include <compat/common/compat_util.h> 59 60 #include <uvm/uvm_extern.h> 61 62 /* 63 * Following 4.3 syscalls were not versioned, even through they should 64 * have been: 65 * connect(2), bind(2), sendto(2) 66 */ 67 68 static int compat_43_sa_put(caddr_t); 69 70 int 71 compat_43_sys_accept(struct lwp *l, void *v, register_t *retval) 72 { 73 struct compat_43_sys_accept_args /* { 74 syscallarg(int) s; 75 syscallarg(caddr_t) name; 76 syscallarg(int *) anamelen; 77 } */ *uap = v; 78 int error; 79 80 if ((error = sys_accept(l, v, retval)) != 0) 81 return error; 82 83 if (SCARG(uap, name) 84 && (error = compat_43_sa_put(SCARG(uap, name)))) 85 return (error); 86 87 return 0; 88 } 89 90 int 91 compat_43_sys_getpeername(struct lwp *l, void *v, register_t *retval) 92 { 93 struct compat_43_sys_getpeername_args /* { 94 syscallarg(int) fdes; 95 syscallarg(caddr_t) asa; 96 syscallarg(int *) alen; 97 } */ *uap = v; 98 99 int error; 100 101 if ((error = sys_getpeername(l, v, retval)) != 0) 102 return error; 103 104 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 105 return (error); 106 107 return 0; 108 } 109 110 int 111 compat_43_sys_getsockname(struct lwp *l, void *v, register_t *retval) 112 { 113 struct compat_43_sys_getsockname_args /* { 114 syscallarg(int) fdes; 115 syscallarg(caddr_t) asa; 116 syscallarg(int *) alen; 117 } */ *uap = v; 118 int error; 119 120 if ((error = sys_getsockname(l, v, retval)) != 0) 121 return error; 122 123 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 124 return (error); 125 126 return 0; 127 } 128 129 int 130 compat_43_sys_recv(struct lwp *l, void *v, register_t *retval) 131 { 132 struct compat_43_sys_recv_args /* { 133 syscallarg(int) s; 134 syscallarg(caddr_t) buf; 135 syscallarg(int) len; 136 syscallarg(int) flags; 137 } */ *uap = v; 138 struct sys_recvfrom_args bra; 139 140 SCARG(&bra, s) = SCARG(uap, s); 141 SCARG(&bra, buf) = SCARG(uap, buf); 142 SCARG(&bra, len) = (size_t) SCARG(uap, len); 143 SCARG(&bra, flags) = SCARG(uap, flags); 144 SCARG(&bra, from) = NULL; 145 SCARG(&bra, fromlenaddr) = NULL; 146 147 return (sys_recvfrom(l, &bra, retval)); 148 } 149 150 int 151 compat_43_sys_recvfrom(struct lwp *l, void *v, register_t *retval) 152 { 153 struct compat_43_sys_recvfrom_args /* { 154 syscallarg(int) s; 155 syscallarg(caddr_t) buf; 156 syscallarg(size_t) len; 157 syscallarg(int) flags; 158 syscallarg(caddr_t) from; 159 syscallarg(int *) fromlenaddr; 160 } */ *uap = v; 161 int error; 162 163 if ((error = sys_recvfrom(l, v, retval))) 164 return (error); 165 166 if (SCARG(uap, from) && (error = compat_43_sa_put(SCARG(uap, from)))) 167 return (error); 168 169 return (0); 170 } 171 172 /* 173 * Old recvmsg. Arrange necessary structures, calls generic code and 174 * adjusts results accordingly. 175 */ 176 int 177 compat_43_sys_recvmsg(struct lwp *l, void *v, register_t *retval) 178 { 179 struct compat_43_sys_recvmsg_args /* { 180 syscallarg(int) s; 181 syscallarg(struct omsghdr *) msg; 182 syscallarg(int) flags; 183 } */ *uap = v; 184 struct proc *p = l->l_proc; 185 struct omsghdr omsg; 186 struct msghdr msg; 187 struct iovec aiov[UIO_SMALLIOV], *iov; 188 int error; 189 190 error = copyin((caddr_t)SCARG(uap, msg), (caddr_t)&omsg, 191 sizeof (struct omsghdr)); 192 if (error) 193 return (error); 194 if ((u_int)omsg.msg_iovlen > UIO_SMALLIOV) { 195 if ((u_int)omsg.msg_iovlen > IOV_MAX) 196 return (EMSGSIZE); 197 iov = malloc(sizeof(struct iovec) * omsg.msg_iovlen, 198 M_IOV, M_WAITOK); 199 } else 200 iov = aiov; 201 202 error = copyin((caddr_t)omsg.msg_iov, (caddr_t)iov, 203 (unsigned)(omsg.msg_iovlen * sizeof (struct iovec))); 204 if (error) 205 goto done; 206 207 msg.msg_name = omsg.msg_name; 208 msg.msg_namelen = omsg.msg_namelen; 209 msg.msg_iovlen = omsg.msg_iovlen; 210 msg.msg_iov = iov; 211 msg.msg_flags = SCARG(uap, flags); 212 213 /* 214 * If caller passes accrights, arrange things for generic code to 215 * DTRT. 216 */ 217 if (omsg.msg_accrights && omsg.msg_accrightslen) { 218 caddr_t sg = stackgap_init(p, 0); 219 struct cmsg *ucmsg; 220 221 /* it was this way in 4.4BSD */ 222 if ((u_int) omsg.msg_accrightslen > MLEN) 223 return (EINVAL); 224 225 ucmsg = stackgap_alloc(p, &sg, CMSG_SPACE(omsg.msg_accrightslen)); 226 if (ucmsg == NULL) 227 return (EMSGSIZE); 228 229 msg.msg_control = ucmsg; 230 msg.msg_controllen = CMSG_SPACE(omsg.msg_accrightslen); 231 } else { 232 msg.msg_control = NULL; 233 msg.msg_controllen = 0; 234 } 235 236 error = recvit(p, SCARG(uap, s), &msg, 237 (caddr_t)&SCARG(uap, msg)->msg_namelen, retval); 238 239 /* 240 * If there is any control information and it's SCM_RIGHTS, 241 * pass it back to the program. 242 */ 243 if (!error && omsg.msg_accrights && msg.msg_controllen > 0) { 244 struct cmsghdr *cmsg; 245 246 /* safe - msg.msg_controllen set by kernel */ 247 cmsg = (struct cmsghdr *) malloc(msg.msg_controllen, 248 M_TEMP, M_WAITOK); 249 250 error = copyin(msg.msg_control, cmsg, msg.msg_controllen); 251 if (error) { 252 free(cmsg, M_TEMP); 253 return (error); 254 } 255 256 if (cmsg->cmsg_level != SOL_SOCKET 257 || cmsg->cmsg_type != SCM_RIGHTS 258 || copyout(CMSG_DATA(cmsg), omsg.msg_accrights, 259 cmsg->cmsg_len)) { 260 omsg.msg_accrightslen = 0; 261 } 262 263 free(cmsg, M_TEMP); 264 265 if (!error) { 266 error = copyout(&cmsg->cmsg_len, 267 &SCARG(uap, msg)->msg_accrightslen, sizeof(int)); 268 } 269 } 270 271 if (!error && omsg.msg_name) { 272 int namelen; 273 274 if ((error = copyin(&SCARG(uap, msg)->msg_namelen, &namelen, sizeof(int)) == 0) 275 && namelen > 0) 276 error = compat_43_sa_put(omsg.msg_name); 277 } 278 279 done: 280 if (iov != aiov) 281 free(iov, M_IOV); 282 return (error); 283 } 284 285 int 286 compat_43_sys_send(struct lwp *l, void *v, register_t *retval) 287 { 288 struct compat_43_sys_send_args /* { 289 syscallarg(int) s; 290 syscallarg(caddr_t) buf; 291 syscallarg(int) len; 292 syscallarg(int) flags; 293 } */ *uap = v; 294 struct sys_sendto_args bsa; 295 296 SCARG(&bsa, s) = SCARG(uap, s); 297 SCARG(&bsa, buf) = SCARG(uap, buf); 298 SCARG(&bsa, len) = SCARG(uap, len); 299 SCARG(&bsa, flags) = SCARG(uap, flags); 300 SCARG(&bsa, to) = NULL; 301 SCARG(&bsa, tolen) = 0; 302 303 return (sys_sendto(l, &bsa, retval)); 304 } 305 306 /* 307 * Old sendmsg. Arrange necessary structures, call generic code and 308 * adjust the results accordingly for old code. 309 */ 310 int 311 compat_43_sys_sendmsg(struct lwp *l, void *v, register_t *retval) 312 { 313 struct compat_43_sys_sendmsg_args /* { 314 syscallarg(int) s; 315 syscallarg(caddr_t) msg; 316 syscallarg(int) flags; 317 } */ *uap = v; 318 struct proc *p = l->l_proc; 319 struct omsghdr omsg; 320 struct msghdr msg; 321 struct iovec aiov[UIO_SMALLIOV], *iov; 322 int error; 323 caddr_t sg = stackgap_init(p, 0); 324 325 error = copyin(SCARG(uap, msg), (caddr_t)&omsg, 326 sizeof (struct omsghdr)); 327 if (error) 328 return (error); 329 if ((u_int)omsg.msg_iovlen > UIO_SMALLIOV) { 330 if ((u_int)omsg.msg_iovlen > IOV_MAX) 331 return (EMSGSIZE); 332 iov = malloc(sizeof(struct iovec) * omsg.msg_iovlen, 333 M_IOV, M_WAITOK); 334 } else 335 iov = aiov; 336 error = copyin((caddr_t)omsg.msg_iov, (caddr_t)iov, 337 (unsigned)(omsg.msg_iovlen * sizeof (struct iovec))); 338 if (error) 339 goto done; 340 341 if (omsg.msg_name) { 342 struct osockaddr *osa; 343 struct sockaddr *sa, *usa; 344 345 if ((u_int) omsg.msg_namelen > UCHAR_MAX) 346 return (EINVAL); 347 348 osa = malloc(omsg.msg_namelen, M_TEMP, M_WAITOK); 349 350 if ((error = copyin(omsg.msg_name, osa, omsg.msg_namelen))) { 351 free(osa, M_TEMP); 352 return (error); 353 } 354 355 sa = (struct sockaddr *) osa; 356 sa->sa_family = osa->sa_family; 357 sa->sa_len = omsg.msg_namelen; 358 359 usa = stackgap_alloc(p, &sg, omsg.msg_namelen); 360 if (!usa) { 361 free(osa, M_TEMP); 362 return (ENOMEM); 363 } 364 365 (void) copyout(sa, usa, omsg.msg_namelen); 366 free(osa, M_TEMP); 367 368 msg.msg_name = usa; 369 msg.msg_namelen = omsg.msg_namelen; 370 } else { 371 msg.msg_name = NULL; 372 msg.msg_namelen = 0; 373 } 374 msg.msg_iovlen = omsg.msg_iovlen; 375 msg.msg_iov = iov; 376 msg.msg_flags = 0; 377 378 if (omsg.msg_accrights && omsg.msg_accrightslen != 0) { 379 struct cmsghdr *cmsg, *ucmsg; 380 381 /* it was this way in 4.4BSD */ 382 if ((u_int) omsg.msg_accrightslen > MLEN) 383 return (EINVAL); 384 385 cmsg = malloc(CMSG_SPACE(omsg.msg_accrightslen), M_TEMP, 386 M_WAITOK); 387 cmsg->cmsg_len = CMSG_SPACE(omsg.msg_accrightslen); 388 cmsg->cmsg_level = SOL_SOCKET; 389 cmsg->cmsg_type = SCM_RIGHTS; 390 391 error = copyin(omsg.msg_accrights, CMSG_DATA(cmsg), 392 omsg.msg_accrightslen); 393 if (error) { 394 free(cmsg, M_TEMP); 395 return (error); 396 } 397 398 ucmsg = stackgap_alloc(p, &sg, CMSG_SPACE(omsg.msg_accrightslen)); 399 if (!ucmsg) { 400 free(cmsg, M_TEMP); 401 return (EMSGSIZE); 402 } 403 404 (void) copyout(cmsg, ucmsg, CMSG_SPACE(omsg.msg_accrightslen)); 405 free(cmsg, M_TEMP); 406 407 msg.msg_control = ucmsg; 408 msg.msg_controllen = CMSG_SPACE(omsg.msg_accrightslen); 409 } else { 410 msg.msg_control = NULL; 411 msg.msg_controllen = 0; 412 } 413 414 error = sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 415 done: 416 if (iov != aiov) 417 FREE(iov, M_IOV); 418 return (error); 419 } 420 421 static int 422 compat_43_sa_put(from) 423 caddr_t from; 424 { 425 struct osockaddr *osa = (struct osockaddr *) from; 426 struct sockaddr sa; 427 struct osockaddr *kosa; 428 int error, len; 429 430 /* 431 * Only read/write the sockaddr family and length, the rest is 432 * not changed. 433 */ 434 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 435 436 error = copyin((caddr_t) osa, (caddr_t) &sa, len); 437 if (error) 438 return (error); 439 440 /* Note: we convert from sockaddr sa_family to osockaddr one here */ 441 kosa = (struct osockaddr *) &sa; 442 kosa->sa_family = sa.sa_family; 443 error = copyout(kosa, osa, len); 444 if (error) 445 return (error); 446 447 return (0); 448 } 449
Indexes created Mon Sep 29 13:09:55 GMT 2025