uipc_syscalls_43.c revision 1.31
1 /* $NetBSD: uipc_syscalls_43.c,v 1.31 2007/06/24 18:01:48 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 1.31 2007/06/24 18:01:48 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 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 /* 273 * Old sendmsg. Arrange necessary structures, call generic code and 274 * adjust the results accordingly for old code. 275 */ 276 int 277 compat_43_sys_sendmsg(struct lwp *l, void *v, register_t *retval) 278 { 279 struct compat_43_sys_sendmsg_args /* { 280 syscallarg(int) s; 281 syscallarg(void *) msg; 282 syscallarg(int) flags; 283 } */ *uap = v; 284 struct omsghdr omsg; 285 struct msghdr msg; 286 int error; 287 struct mbuf *nam; 288 struct mbuf *ctl; 289 struct osockaddr *osa; 290 struct sockaddr *sa; 291 292 error = copyin(SCARG(uap, msg), &omsg, sizeof (struct omsghdr)); 293 if (error != 0) 294 return (error); 295 296 msg.msg_iovlen = omsg.msg_iovlen; 297 msg.msg_iov = omsg.msg_iov; 298 299 error = sockargs(&nam, omsg.msg_name, omsg.msg_namelen, MT_SONAME); 300 if (error != 0) 301 return (error); 302 303 sa = mtod(nam, void *); 304 osa = mtod(nam, void *); 305 sa->sa_family = osa->sa_family; 306 sa->sa_len = omsg.msg_namelen; 307 308 msg.msg_flags = MSG_IOVUSRSPACE | MSG_NAMEMBUF; 309 310 msg.msg_name = nam; 311 msg.msg_namelen = omsg.msg_namelen; 312 313 if (omsg.msg_accrights && omsg.msg_accrightslen != 0) { 314 struct cmsghdr *cmsg; 315 u_int clen; 316 317 clen = CMSG_SPACE(omsg.msg_accrightslen); 318 /* it was (almost) this way in 4.4BSD */ 319 if (omsg.msg_accrightslen < 0 || clen > MLEN) { 320 error = EINVAL; 321 goto bad; 322 } 323 324 ctl = m_get(M_WAIT, MT_CONTROL); 325 ctl->m_len = clen; 326 cmsg = mtod(ctl, void *); 327 cmsg->cmsg_len = CMSG_SPACE(omsg.msg_accrightslen); 328 cmsg->cmsg_level = SOL_SOCKET; 329 cmsg->cmsg_type = SCM_RIGHTS; 330 331 error = copyin(omsg.msg_accrights, CMSG_DATA(cmsg), 332 omsg.msg_accrightslen); 333 if (error) 334 goto bad; 335 336 msg.msg_control = ctl; 337 msg.msg_controllen = clen; 338 msg.msg_flags |= MSG_CONTROLMBUF; 339 } else { 340 msg.msg_control = NULL; 341 msg.msg_controllen = 0; 342 } 343 344 return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval); 345 346 bad: 347 if (nam != NULL) 348 m_free(nam); 349 350 return (error); 351 } 352 353 static int 354 compat_43_sa_put(from) 355 void *from; 356 { 357 struct osockaddr *osa = (struct osockaddr *) from; 358 struct sockaddr sa; 359 struct osockaddr *kosa; 360 int error, len; 361 362 /* 363 * Only read/write the sockaddr family and length, the rest is 364 * not changed. 365 */ 366 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 367 368 error = copyin((void *) osa, (void *) &sa, len); 369 if (error) 370 return (error); 371 372 /* Note: we convert from sockaddr sa_family to osockaddr one here */ 373 kosa = (struct osockaddr *) &sa; 374 kosa->sa_family = sa.sa_family; 375 error = copyout(kosa, osa, len); 376 if (error) 377 return (error); 378 379 return (0); 380 } 381 382 int 383 compat_ifioctl(struct socket *so, u_long ocmd, u_long cmd, void *data, 384 struct lwp *l) 385 { 386 int error; 387 struct ifreq *ifr = data; 388 struct ifnet *ifp = ifunit(ifr->ifr_name); 389 struct sockaddr *sa; 390 391 if (ifp == NULL) 392 return ENXIO; 393 394 switch (ocmd) { 395 case OSIOCSIFADDR: 396 case OSIOCSIFDSTADDR: 397 case OSIOCSIFBRDADDR: 398 case OSIOCSIFNETMASK: 399 sa = &ifr->ifr_addr; 400 #if BYTE_ORDER != BIG_ENDIAN 401 if (sa->sa_family == 0 && sa->sa_len < 16) { 402 sa->sa_family = sa->sa_len; 403 sa->sa_len = 16; 404 } 405 #else 406 if (sa->sa_len == 0) 407 sa->sa_len = 16; 408 #endif 409 break; 410 411 case OOSIOCGIFADDR: 412 cmd = SIOCGIFADDR; 413 break; 414 415 case OOSIOCGIFDSTADDR: 416 cmd = SIOCGIFDSTADDR; 417 break; 418 419 case OOSIOCGIFBRDADDR: 420 cmd = SIOCGIFBRDADDR; 421 break; 422 423 case OOSIOCGIFNETMASK: 424 cmd = SIOCGIFNETMASK; 425 } 426 427 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 428 (struct mbuf *)cmd, (struct mbuf *)ifr, (struct mbuf *)ifp, l); 429 430 switch (ocmd) { 431 case OOSIOCGIFADDR: 432 case OOSIOCGIFDSTADDR: 433 case OOSIOCGIFBRDADDR: 434 case OOSIOCGIFNETMASK: 435 *(u_int16_t *)&ifr->ifr_addr = 436 ((struct sockaddr *)&ifr->ifr_addr)->sa_family; 437 } 438 return error; 439 } 440
Indexes created Mon Sep 29 21:09:56 GMT 2025