uipc_syscalls_43.c revision 1.47.14.5
1 /* $NetBSD: uipc_syscalls_43.c,v 1.47.14.5 2018/05/21 04:36:03 pgoyette 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 1.47.14.5 2018/05/21 04:36:03 pgoyette 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/syslog.h> 49 #include <sys/unistd.h> 50 #include <sys/resourcevar.h> 51 #include <sys/mbuf.h> /* for MLEN */ 52 #include <sys/protosw.h> 53 54 #include <sys/mount.h> 55 #include <sys/syscall.h> 56 #include <sys/syscallvar.h> 57 #include <sys/syscallargs.h> 58 59 #include <net/if.h> 60 #include <net/bpf.h> 61 #include <net/route.h> 62 #include <netinet/in.h> 63 #include <netinet/in_systm.h> 64 #include <netinet/ip.h> 65 #include <net/if_gre.h> 66 #include <net/if_atm.h> 67 #include <net/if_tap.h> 68 #include <net80211/ieee80211_ioctl.h> 69 #include <netinet6/in6_var.h> 70 #include <netinet6/nd6.h> 71 #include <compat/sys/socket.h> 72 #include <compat/sys/sockio.h> 73 74 #include <compat/common/compat_util.h> 75 #include <compat/common/compat_mod.h> 76 77 #include <uvm/uvm_extern.h> 78 79 /* 80 * Following 4.3 syscalls were not versioned, even through they should 81 * have been: 82 * connect(2), bind(2), sendto(2) 83 */ 84 85 static struct syscall_package uipc_syscalls_43_syscalls[] = { 86 { SYS_compat_43_oaccept, 0, (sy_call_t *)compat_43_sys_accept }, 87 { SYS_compat_43_ogetpeername, 0, 88 (sy_call_t *)compat_43_sys_getpeername }, 89 { SYS_compat_43_ogetsockname, 0, 90 (sy_call_t *)compat_43_sys_getsockname }, 91 { SYS_compat_43_orecv, 0, (sy_call_t *)compat_43_sys_recv }, 92 { SYS_compat_43_orecvfrom, 0, (sy_call_t *)compat_43_sys_recvfrom }, 93 { SYS_compat_43_orecvmsg, 0, (sy_call_t *)compat_43_sys_recvmsg }, 94 { SYS_compat_43_osend, 0, (sy_call_t *)compat_43_sys_send }, 95 { SYS_compat_43_osendmsg, 0, (sy_call_t *)compat_43_sys_sendmsg }, 96 { 0, 0, NULL } 97 }; 98 99 static int compat_43_sa_put(void *); 100 101 int 102 compat_43_sys_accept(struct lwp *l, const struct compat_43_sys_accept_args *uap, register_t *retval) 103 { 104 /* { 105 syscallarg(int) s; 106 syscallarg(void *) name; 107 syscallarg(int *) anamelen; 108 } */ 109 int error; 110 111 if ((error = sys_accept(l, (const struct sys_accept_args *)uap, retval)) != 0) 112 return error; 113 114 if (SCARG(uap, name) 115 && (error = compat_43_sa_put(SCARG(uap, name)))) 116 return (error); 117 118 return 0; 119 } 120 121 int 122 compat_43_sys_getpeername(struct lwp *l, const struct compat_43_sys_getpeername_args *uap, register_t *retval) 123 { 124 /* { 125 syscallarg(int) fdes; 126 syscallarg(void *) asa; 127 syscallarg(int *) alen; 128 } */ 129 130 int error; 131 132 if ((error = sys_getpeername(l, (const struct sys_getpeername_args *)uap, retval)) != 0) 133 return error; 134 135 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 136 return (error); 137 138 return 0; 139 } 140 141 int 142 compat_43_sys_getsockname(struct lwp *l, const struct compat_43_sys_getsockname_args *uap, register_t *retval) 143 { 144 /* { 145 syscallarg(int) fdes; 146 syscallarg(void *) asa; 147 syscallarg(int *) alen; 148 } */ 149 int error; 150 151 if ((error = sys_getsockname(l, (const struct sys_getsockname_args *)uap, retval)) != 0) 152 return error; 153 154 if ((error = compat_43_sa_put(SCARG(uap, asa)))) 155 return (error); 156 157 return 0; 158 } 159 160 int 161 compat_43_sys_recv(struct lwp *l, const struct compat_43_sys_recv_args *uap, register_t *retval) 162 { 163 /* { 164 syscallarg(int) s; 165 syscallarg(void *) buf; 166 syscallarg(int) len; 167 syscallarg(int) flags; 168 } */ 169 struct sys_recvfrom_args bra; 170 171 SCARG(&bra, s) = SCARG(uap, s); 172 SCARG(&bra, buf) = SCARG(uap, buf); 173 SCARG(&bra, len) = (size_t) SCARG(uap, len); 174 SCARG(&bra, flags) = SCARG(uap, flags); 175 SCARG(&bra, from) = NULL; 176 SCARG(&bra, fromlenaddr) = NULL; 177 178 return (sys_recvfrom(l, &bra, retval)); 179 } 180 181 int 182 compat_43_sys_recvfrom(struct lwp *l, const struct compat_43_sys_recvfrom_args *uap, register_t *retval) 183 { 184 /* { 185 syscallarg(int) s; 186 syscallarg(void *) buf; 187 syscallarg(size_t) len; 188 syscallarg(int) flags; 189 syscallarg(void *) from; 190 syscallarg(int *) fromlenaddr; 191 } */ 192 int error; 193 194 if ((error = sys_recvfrom(l, (const struct sys_recvfrom_args *)uap, retval))) 195 return (error); 196 197 if (SCARG(uap, from) && (error = compat_43_sa_put(SCARG(uap, from)))) 198 return (error); 199 200 return (0); 201 } 202 203 /* 204 * Old recvmsg. Arrange necessary structures, calls generic code and 205 * adjusts results accordingly. 206 */ 207 int 208 compat_43_sys_recvmsg(struct lwp *l, const struct compat_43_sys_recvmsg_args *uap, register_t *retval) 209 { 210 /* { 211 syscallarg(int) s; 212 syscallarg(struct omsghdr *) msg; 213 syscallarg(int) flags; 214 } */ 215 struct omsghdr omsg; 216 struct msghdr msg; 217 struct mbuf *from, *control; 218 int error; 219 220 error = copyin(SCARG(uap, msg), &omsg, sizeof (struct omsghdr)); 221 if (error) 222 return (error); 223 224 if (omsg.msg_accrights == NULL) 225 omsg.msg_accrightslen = 0; 226 /* it was this way in 4.4BSD */ 227 if (omsg.msg_accrightslen > MLEN) 228 return EINVAL; 229 230 msg.msg_name = omsg.msg_name; 231 msg.msg_namelen = omsg.msg_namelen; 232 msg.msg_iovlen = omsg.msg_iovlen; 233 msg.msg_iov = omsg.msg_iov; 234 msg.msg_flags = (SCARG(uap, flags) & MSG_USERFLAGS) | MSG_IOVUSRSPACE; 235 236 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 237 omsg.msg_accrights != NULL ? &control : NULL, retval); 238 if (error != 0) 239 return error; 240 241 /* 242 * If there is any control information and it's SCM_RIGHTS, 243 * pass it back to the program. 244 * XXX: maybe there can be more than one chunk of control data? 245 */ 246 if (omsg.msg_accrights && control != NULL) { 247 struct cmsghdr *cmsg = mtod(control, struct cmsghdr *); 248 249 if (cmsg->cmsg_level == SOL_SOCKET 250 && cmsg->cmsg_type == SCM_RIGHTS 251 && cmsg->cmsg_len < omsg.msg_accrightslen 252 && copyout(CMSG_DATA(cmsg), omsg.msg_accrights, 253 cmsg->cmsg_len) == 0) { 254 omsg.msg_accrightslen = cmsg->cmsg_len; 255 free_control_mbuf(l, control, control->m_next); 256 } else { 257 omsg.msg_accrightslen = 0; 258 free_control_mbuf(l, control, control); 259 } 260 } else 261 omsg.msg_accrightslen = 0; 262 263 if (from != NULL) 264 /* convert from sockaddr sa_family to osockaddr one here */ 265 mtod(from, struct osockaddr *)->sa_family = 266 mtod(from, struct sockaddr *)->sa_family; 267 268 error = copyout_sockname((struct sockaddr *)omsg.msg_name, &omsg.msg_namelen, 0, from); 269 if (from != NULL) 270 m_free(from); 271 272 if (error != 0) 273 error = copyout(&omsg, SCARG(uap, msg), sizeof(omsg)); 274 275 return error; 276 } 277 278 int 279 compat_43_sys_send(struct lwp *l, const struct compat_43_sys_send_args *uap, register_t *retval) 280 { 281 /* { 282 syscallarg(int) s; 283 syscallarg(void *) buf; 284 syscallarg(int) len; 285 syscallarg(int) flags; 286 } */ 287 struct sys_sendto_args bsa; 288 289 SCARG(&bsa, s) = SCARG(uap, s); 290 SCARG(&bsa, buf) = SCARG(uap, buf); 291 SCARG(&bsa, len) = SCARG(uap, len); 292 SCARG(&bsa, flags) = SCARG(uap, flags); 293 SCARG(&bsa, to) = NULL; 294 SCARG(&bsa, tolen) = 0; 295 296 return (sys_sendto(l, &bsa, retval)); 297 } 298 299 int 300 compat43_set_accrights(struct msghdr *msg, void *accrights, int accrightslen) 301 { 302 struct cmsghdr *cmsg; 303 int error; 304 struct mbuf *ctl; 305 u_int clen; 306 307 if (accrights == NULL || accrightslen == 0) { 308 msg->msg_control = NULL; 309 msg->msg_controllen = 0; 310 return 0; 311 } 312 313 clen = CMSG_SPACE(accrightslen); 314 /* it was (almost) this way in 4.4BSD */ 315 if (accrightslen < 0 || clen > MLEN) 316 return EINVAL; 317 318 ctl = m_get(M_WAIT, MT_CONTROL); 319 ctl->m_len = clen; 320 cmsg = mtod(ctl, struct cmsghdr *); 321 cmsg->cmsg_len = CMSG_SPACE(accrightslen); 322 cmsg->cmsg_level = SOL_SOCKET; 323 cmsg->cmsg_type = SCM_RIGHTS; 324 325 error = copyin(accrights, CMSG_DATA(cmsg), accrightslen); 326 if (error) { 327 m_free(ctl); 328 return error; 329 } 330 331 msg->msg_control = ctl; 332 msg->msg_controllen = clen; 333 msg->msg_flags |= MSG_CONTROLMBUF; 334 return 0; 335 } 336 337 /* 338 * Old sendmsg. Arrange necessary structures, call generic code and 339 * adjust the results accordingly for old code. 340 */ 341 int 342 compat_43_sys_sendmsg(struct lwp *l, const struct compat_43_sys_sendmsg_args *uap, register_t *retval) 343 { 344 /* { 345 syscallarg(int) s; 346 syscallarg(void *) msg; 347 syscallarg(int) flags; 348 } */ 349 struct omsghdr omsg; 350 struct msghdr msg; 351 int error; 352 struct mbuf *nam; 353 struct osockaddr *osa; 354 struct sockaddr *sa; 355 356 error = copyin(SCARG(uap, msg), &omsg, sizeof (struct omsghdr)); 357 if (error != 0) 358 return (error); 359 360 msg.msg_iovlen = omsg.msg_iovlen; 361 msg.msg_iov = omsg.msg_iov; 362 363 error = sockargs(&nam, omsg.msg_name, omsg.msg_namelen, 364 UIO_USERSPACE, MT_SONAME); 365 if (error != 0) 366 return (error); 367 368 sa = mtod(nam, struct sockaddr *); 369 osa = mtod(nam, struct osockaddr *); 370 sa->sa_family = osa->sa_family; 371 sa->sa_len = omsg.msg_namelen; 372 373 msg.msg_flags = MSG_IOVUSRSPACE | MSG_NAMEMBUF; 374 375 msg.msg_name = nam; 376 msg.msg_namelen = omsg.msg_namelen; 377 error = compat43_set_accrights(&msg, omsg.msg_accrights, 378 omsg.msg_accrightslen); 379 if (error != 0) 380 goto bad; 381 382 return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), 383 retval); 384 385 bad: 386 if (nam != NULL) 387 m_free(nam); 388 389 return (error); 390 } 391 392 static int 393 compat_43_sa_put(void *from) 394 { 395 struct osockaddr *osa = (struct osockaddr *) from; 396 struct sockaddr sa; 397 struct osockaddr *kosa; 398 int error, len; 399 400 /* 401 * Only read/write the sockaddr family and length, the rest is 402 * not changed. 403 */ 404 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 405 406 error = copyin((void *) osa, (void *) &sa, len); 407 if (error) 408 return (error); 409 410 /* Note: we convert from sockaddr sa_family to osockaddr one here */ 411 kosa = (struct osockaddr *) &sa; 412 kosa->sa_family = sa.sa_family; 413 error = copyout(kosa, osa, len); 414 if (error) 415 return (error); 416 417 return (0); 418 } 419 420 int 421 uipc_syscalls_43_init(void) 422 { 423 424 return syscall_establish(NULL, uipc_syscalls_43_syscalls); 425 } 426 427 int 428 uipc_syscalls_43_fini(void) 429 { 430 431 return syscall_disestablish(NULL, uipc_syscalls_43_syscalls); 432 } 433
Indexes created Sat Oct 25 16:10:12 GMT 2025