1 /* $NetBSD: linux_socket.c,v 1.132 2016/08/01 03:15:30 ozaki-r Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Functions in multiarch: 34 * linux_sys_socketcall : linux_socketcall.c 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: linux_socket.c,v 1.132 2016/08/01 03:15:30 ozaki-r Exp $"); 39 40 #if defined(_KERNEL_OPT) 41 #include "opt_inet.h" 42 #endif /* defined(_KERNEL_OPT) */ 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/systm.h> 47 #include <sys/buf.h> 48 #include <sys/ioctl.h> 49 #include <sys/tty.h> 50 #include <sys/file.h> 51 #include <sys/filedesc.h> 52 #include <sys/select.h> 53 #include <sys/socket.h> 54 #include <sys/socketvar.h> 55 #include <sys/domain.h> 56 #include <net/if.h> 57 #include <net/if_dl.h> 58 #include <net/if_types.h> 59 #include <netinet/in.h> 60 #include <netinet/tcp.h> 61 #include <sys/mount.h> 62 #include <sys/proc.h> 63 #include <sys/vnode.h> 64 #include <sys/device.h> 65 #include <sys/protosw.h> 66 #include <sys/mbuf.h> 67 #include <sys/syslog.h> 68 #include <sys/exec.h> 69 #include <sys/kauth.h> 70 #include <sys/syscallargs.h> 71 #include <sys/ktrace.h> 72 73 #include <lib/libkern/libkern.h> 74 75 #include <netinet/ip6.h> 76 #include <netinet6/ip6_var.h> 77 78 #include <compat/sys/socket.h> 79 #include <compat/sys/sockio.h> 80 81 #include <compat/linux/common/linux_types.h> 82 #include <compat/linux/common/linux_util.h> 83 #include <compat/linux/common/linux_signal.h> 84 #include <compat/linux/common/linux_ioctl.h> 85 #include <compat/linux/common/linux_socket.h> 86 #include <compat/linux/common/linux_fcntl.h> 87 #if !defined(__alpha__) && !defined(__amd64__) 88 #include <compat/linux/common/linux_socketcall.h> 89 #endif 90 #include <compat/linux/common/linux_sockio.h> 91 #include <compat/linux/common/linux_ipc.h> 92 #include <compat/linux/common/linux_sem.h> 93 94 #include <compat/linux/linux_syscallargs.h> 95 96 #ifdef DEBUG_LINUX 97 #define DPRINTF(a) uprintf a 98 #else 99 #define DPRINTF(a) 100 #endif 101 102 /* 103 * The calls in this file are entered either via the linux_socketcall() 104 * interface or, on the Alpha, as individual syscalls. The 105 * linux_socketcall function does any massaging of arguments so that all 106 * the calls in here need not think that they are anything other 107 * than a normal syscall. 108 */ 109 110 static int linux_to_bsd_domain(int); 111 static int bsd_to_linux_domain(int); 112 static int linux_to_bsd_type(int); 113 int linux_to_bsd_sopt_level(int); 114 int linux_to_bsd_so_sockopt(int); 115 int linux_to_bsd_ip_sockopt(int); 116 int linux_to_bsd_ipv6_sockopt(int); 117 int linux_to_bsd_tcp_sockopt(int); 118 int linux_to_bsd_udp_sockopt(int); 119 int linux_getifname(struct lwp *, register_t *, void *); 120 int linux_getifconf(struct lwp *, register_t *, void *); 121 int linux_getifhwaddr(struct lwp *, register_t *, u_int, void *); 122 static int linux_get_sa(struct lwp *, int, struct sockaddr_big *, 123 const struct osockaddr *, socklen_t); 124 static int linux_sa_put(struct osockaddr *osa); 125 static int linux_to_bsd_msg_flags(int); 126 static int bsd_to_linux_msg_flags(int); 127 static void linux_to_bsd_msghdr(struct linux_msghdr *, struct msghdr *); 128 static void bsd_to_linux_msghdr(struct msghdr *, struct linux_msghdr *); 129 130 static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { 131 AF_UNSPEC, 132 AF_UNIX, 133 AF_INET, 134 AF_CCITT, /* LINUX_AF_AX25 */ 135 AF_IPX, 136 AF_APPLETALK, 137 -1, /* LINUX_AF_NETROM */ 138 -1, /* LINUX_AF_BRIDGE */ 139 -1, /* LINUX_AF_ATMPVC */ 140 AF_CCITT, /* LINUX_AF_X25 */ 141 AF_INET6, 142 -1, /* LINUX_AF_ROSE */ 143 AF_DECnet, 144 -1, /* LINUX_AF_NETBEUI */ 145 -1, /* LINUX_AF_SECURITY */ 146 pseudo_AF_KEY, 147 AF_ROUTE, /* LINUX_AF_NETLINK */ 148 -1, /* LINUX_AF_PACKET */ 149 -1, /* LINUX_AF_ASH */ 150 -1, /* LINUX_AF_ECONET */ 151 -1, /* LINUX_AF_ATMSVC */ 152 AF_SNA, 153 /* rest up to LINUX_AF_MAX-1 is not allocated */ 154 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 155 }; 156 157 static const int bsd_to_linux_domain_[AF_MAX] = { 158 LINUX_AF_UNSPEC, 159 LINUX_AF_UNIX, 160 LINUX_AF_INET, 161 -1, /* AF_IMPLINK */ 162 -1, /* AF_PUP */ 163 -1, /* AF_CHAOS */ 164 -1, /* AF_NS */ 165 -1, /* AF_ISO */ 166 -1, /* AF_ECMA */ 167 -1, /* AF_DATAKIT */ 168 LINUX_AF_AX25, /* AF_CCITT */ 169 LINUX_AF_SNA, 170 LINUX_AF_DECnet, 171 -1, /* AF_DLI */ 172 -1, /* AF_LAT */ 173 -1, /* AF_HYLINK */ 174 LINUX_AF_APPLETALK, 175 LINUX_AF_NETLINK, 176 -1, /* AF_LINK */ 177 -1, /* AF_XTP */ 178 -1, /* AF_COIP */ 179 -1, /* AF_CNT */ 180 -1, /* pseudo_AF_RTIP */ 181 LINUX_AF_IPX, 182 LINUX_AF_INET6, 183 -1, /* pseudo_AF_PIP */ 184 -1, /* AF_ISDN */ 185 -1, /* AF_NATM */ 186 -1, /* AF_ARP */ 187 LINUX_pseudo_AF_KEY, 188 -1, /* pseudo_AF_HDRCMPLT */ 189 }; 190 191 static const struct { 192 int bfl; 193 int lfl; 194 } bsd_to_linux_msg_flags_[] = { 195 {MSG_OOB, LINUX_MSG_OOB}, 196 {MSG_PEEK, LINUX_MSG_PEEK}, 197 {MSG_DONTROUTE, LINUX_MSG_DONTROUTE}, 198 {MSG_EOR, LINUX_MSG_EOR}, 199 {MSG_TRUNC, LINUX_MSG_TRUNC}, 200 {MSG_CTRUNC, LINUX_MSG_CTRUNC}, 201 {MSG_WAITALL, LINUX_MSG_WAITALL}, 202 {MSG_DONTWAIT, LINUX_MSG_DONTWAIT}, 203 {MSG_BCAST, 0}, /* not supported, clear */ 204 {MSG_MCAST, 0}, /* not supported, clear */ 205 {MSG_NOSIGNAL, LINUX_MSG_NOSIGNAL}, 206 {-1, /* not supp */ LINUX_MSG_PROBE}, 207 {-1, /* not supp */ LINUX_MSG_FIN}, 208 {-1, /* not supp */ LINUX_MSG_SYN}, 209 {-1, /* not supp */ LINUX_MSG_CONFIRM}, 210 {-1, /* not supp */ LINUX_MSG_RST}, 211 {-1, /* not supp */ LINUX_MSG_ERRQUEUE}, 212 {-1, /* not supp */ LINUX_MSG_MORE}, 213 }; 214 215 /* 216 * Convert between Linux and BSD socket domain values 217 */ 218 static int 219 linux_to_bsd_domain(int ldom) 220 { 221 if (ldom < 0 || ldom >= LINUX_AF_MAX) 222 return (-1); 223 224 return linux_to_bsd_domain_[ldom]; 225 } 226 227 /* 228 * Convert between BSD and Linux socket domain values 229 */ 230 static int 231 bsd_to_linux_domain(int bdom) 232 { 233 if (bdom < 0 || bdom >= AF_MAX) 234 return (-1); 235 236 return bsd_to_linux_domain_[bdom]; 237 } 238 239 static int 240 linux_to_bsd_type(int ltype) 241 { 242 int type, flags; 243 244 /* Real types are identical between Linux and NetBSD */ 245 type = ltype & LINUX_SOCK_TYPE_MASK; 246 247 /* But flags are not .. */ 248 flags = ltype & ~LINUX_SOCK_TYPE_MASK; 249 if (flags & ~(LINUX_SOCK_CLOEXEC|LINUX_SOCK_NONBLOCK)) 250 return -1; 251 252 if (flags & LINUX_SOCK_CLOEXEC) 253 type |= SOCK_CLOEXEC; 254 if (flags & LINUX_SOCK_NONBLOCK) 255 type |= SOCK_NONBLOCK; 256 257 return type; 258 } 259 260 static int 261 linux_to_bsd_msg_flags(int lflag) 262 { 263 int i, lfl, bfl; 264 int bflag = 0; 265 266 if (lflag == 0) 267 return (0); 268 269 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 270 bfl = bsd_to_linux_msg_flags_[i].bfl; 271 lfl = bsd_to_linux_msg_flags_[i].lfl; 272 273 if (lfl == 0) 274 continue; 275 276 if (lflag & lfl) { 277 if (bfl < 0) 278 return (-1); 279 280 bflag |= bfl; 281 } 282 } 283 284 return (bflag); 285 } 286 287 static int 288 bsd_to_linux_msg_flags(int bflag) 289 { 290 int i, lfl, bfl; 291 int lflag = 0; 292 293 if (bflag == 0) 294 return (0); 295 296 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 297 bfl = bsd_to_linux_msg_flags_[i].bfl; 298 lfl = bsd_to_linux_msg_flags_[i].lfl; 299 300 if (bfl <= 0) 301 continue; 302 303 if (bflag & bfl) { 304 if (lfl < 0) 305 return (-1); 306 307 lflag |= lfl; 308 } 309 } 310 311 return (lflag); 312 } 313 314 int 315 linux_sys_socket(struct lwp *l, const struct linux_sys_socket_args *uap, register_t *retval) 316 { 317 /* { 318 syscallarg(int) domain; 319 syscallarg(int) type; 320 syscallarg(int) protocol; 321 } */ 322 struct sys___socket30_args bsa; 323 int error; 324 325 326 SCARG(&bsa, protocol) = SCARG(uap, protocol); 327 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 328 if (SCARG(&bsa, domain) == -1) 329 return EINVAL; 330 SCARG(&bsa, type) = linux_to_bsd_type(SCARG(uap, type)); 331 if (SCARG(&bsa, type) == -1) 332 return EINVAL; 333 /* 334 * Apparently linux uses this to talk to ISDN sockets. If we fail 335 * now programs seems to handle it, but if we don't we are going 336 * to fail when we bind and programs don't handle this well. 337 */ 338 if (SCARG(&bsa, domain) == AF_ROUTE && SCARG(&bsa, type) == SOCK_RAW) 339 return ENOTSUP; 340 error = sys___socket30(l, &bsa, retval); 341 342 #ifdef INET6 343 /* 344 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 345 * default and some apps depend on this. So, set V6ONLY to 0 346 * for Linux apps if the sysctl value is set to 1. 347 */ 348 if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { 349 struct socket *so; 350 351 if (fd_getsock(*retval, &so) == 0) { 352 int val = 0; 353 354 /* ignore error */ 355 (void)so_setsockopt(l, so, IPPROTO_IPV6, IPV6_V6ONLY, 356 &val, sizeof(val)); 357 358 fd_putfile(*retval); 359 } 360 } 361 #endif 362 363 return (error); 364 } 365 366 int 367 linux_sys_socketpair(struct lwp *l, const struct linux_sys_socketpair_args *uap, register_t *retval) 368 { 369 /* { 370 syscallarg(int) domain; 371 syscallarg(int) type; 372 syscallarg(int) protocol; 373 syscallarg(int *) rsv; 374 } */ 375 struct sys_socketpair_args bsa; 376 377 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 378 if (SCARG(&bsa, domain) == -1) 379 return EINVAL; 380 SCARG(&bsa, type) = linux_to_bsd_type(SCARG(uap, type)); 381 if (SCARG(&bsa, type) == -1) 382 return EINVAL; 383 SCARG(&bsa, protocol) = SCARG(uap, protocol); 384 SCARG(&bsa, rsv) = SCARG(uap, rsv); 385 386 return sys_socketpair(l, &bsa, retval); 387 } 388 389 int 390 linux_sys_sendto(struct lwp *l, const struct linux_sys_sendto_args *uap, register_t *retval) 391 { 392 /* { 393 syscallarg(int) s; 394 syscallarg(void *) msg; 395 syscallarg(int) len; 396 syscallarg(int) flags; 397 syscallarg(struct osockaddr *) to; 398 syscallarg(int) tolen; 399 } */ 400 struct msghdr msg; 401 struct iovec aiov; 402 struct sockaddr_big nam; 403 int bflags; 404 int error; 405 406 /* Translate message flags. */ 407 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 408 if (bflags < 0) 409 /* Some supported flag */ 410 return EINVAL; 411 412 msg.msg_flags = 0; 413 msg.msg_name = NULL; 414 msg.msg_control = NULL; 415 416 if (SCARG(uap, tolen)) { 417 /* Read in and convert the sockaddr */ 418 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to), 419 SCARG(uap, tolen)); 420 if (error) 421 return (error); 422 msg.msg_name = &nam; 423 msg.msg_namelen = SCARG(uap, tolen); 424 } 425 426 msg.msg_iov = &aiov; 427 msg.msg_iovlen = 1; 428 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 429 aiov.iov_len = SCARG(uap, len); 430 431 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 432 } 433 434 static void 435 linux_to_bsd_msghdr(struct linux_msghdr *lmsg, struct msghdr *bmsg) 436 { 437 bmsg->msg_name = lmsg->msg_name; 438 bmsg->msg_namelen = lmsg->msg_namelen; 439 bmsg->msg_iov = lmsg->msg_iov; 440 bmsg->msg_iovlen = lmsg->msg_iovlen; 441 bmsg->msg_control = lmsg->msg_control; 442 bmsg->msg_controllen = lmsg->msg_controllen; 443 bmsg->msg_flags = lmsg->msg_flags; 444 } 445 446 static void 447 bsd_to_linux_msghdr(struct msghdr *bmsg, struct linux_msghdr *lmsg) 448 { 449 lmsg->msg_name = bmsg->msg_name; 450 lmsg->msg_namelen = bmsg->msg_namelen; 451 lmsg->msg_iov = bmsg->msg_iov; 452 lmsg->msg_iovlen = bmsg->msg_iovlen; 453 lmsg->msg_control = bmsg->msg_control; 454 lmsg->msg_controllen = bmsg->msg_controllen; 455 lmsg->msg_flags = bmsg->msg_flags; 456 } 457 458 int 459 linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval) 460 { 461 /* { 462 syscallarg(int) s; 463 syscallarg(struct linux_msghdr *) msg; 464 syscallarg(u_int) flags; 465 } */ 466 struct msghdr msg; 467 struct linux_msghdr lmsg; 468 int error; 469 int bflags; 470 struct sockaddr_big nam; 471 u_int8_t *control; 472 struct mbuf *ctl_mbuf = NULL; 473 474 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 475 if (error) 476 return error; 477 linux_to_bsd_msghdr(&lmsg, &msg); 478 479 msg.msg_flags = MSG_IOVUSRSPACE; 480 481 /* 482 * Translate message flags. 483 */ 484 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 485 if (bflags < 0) 486 /* Some supported flag */ 487 return EINVAL; 488 489 if (lmsg.msg_name) { 490 /* Read in and convert the sockaddr */ 491 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 492 msg.msg_namelen); 493 if (error) 494 return (error); 495 msg.msg_name = &nam; 496 } 497 498 /* 499 * Handle cmsg if there is any. 500 */ 501 if (LINUX_CMSG_FIRSTHDR(&lmsg)) { 502 struct linux_cmsghdr l_cmsg, *l_cc; 503 struct cmsghdr *cmsg; 504 ssize_t resid = msg.msg_controllen; 505 size_t clen, cidx = 0, cspace; 506 507 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 508 clen = MLEN; 509 control = mtod(ctl_mbuf, void *); 510 511 l_cc = LINUX_CMSG_FIRSTHDR(&lmsg); 512 do { 513 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 514 if (error) 515 goto done; 516 517 /* 518 * Sanity check the control message length. 519 */ 520 if (l_cmsg.cmsg_len > resid 521 || l_cmsg.cmsg_len < sizeof l_cmsg) { 522 error = EINVAL; 523 goto done; 524 } 525 526 /* 527 * Refuse unsupported control messages, and 528 * translate fields as appropriate. 529 */ 530 switch (l_cmsg.cmsg_level) { 531 case LINUX_SOL_SOCKET: 532 /* It only differs on some archs */ 533 if (LINUX_SOL_SOCKET != SOL_SOCKET) 534 l_cmsg.cmsg_level = SOL_SOCKET; 535 536 switch(l_cmsg.cmsg_type) { 537 case LINUX_SCM_RIGHTS: 538 /* Linux SCM_RIGHTS is same as NetBSD */ 539 break; 540 541 case LINUX_SCM_CREDENTIALS: 542 /* no native equivalent, just drop it */ 543 m_free(ctl_mbuf); 544 ctl_mbuf = NULL; 545 msg.msg_control = NULL; 546 msg.msg_controllen = 0; 547 goto skipcmsg; 548 549 default: 550 /* other types not supported */ 551 error = EINVAL; 552 goto done; 553 } 554 break; 555 default: 556 /* pray and leave intact */ 557 break; 558 } 559 560 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 561 562 /* Check the buffer is big enough */ 563 if (__predict_false(cidx + cspace > clen)) { 564 u_int8_t *nc; 565 566 clen = cidx + cspace; 567 if (clen >= PAGE_SIZE) { 568 error = EINVAL; 569 goto done; 570 } 571 nc = realloc(clen <= MLEN ? NULL : control, 572 clen, M_TEMP, M_WAITOK); 573 if (!nc) { 574 error = ENOMEM; 575 goto done; 576 } 577 if (cidx <= MLEN) 578 /* Old buffer was in mbuf... */ 579 memcpy(nc, control, cidx); 580 control = nc; 581 } 582 583 /* Copy header */ 584 cmsg = (void *)&control[cidx]; 585 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 586 cmsg->cmsg_level = l_cmsg.cmsg_level; 587 cmsg->cmsg_type = l_cmsg.cmsg_type; 588 589 /* Zero area between header and data */ 590 memset(cmsg + 1, 0, 591 CMSG_ALIGN(sizeof(*cmsg)) - sizeof(*cmsg)); 592 593 /* Copyin the data */ 594 error = copyin(LINUX_CMSG_DATA(l_cc), 595 CMSG_DATA(cmsg), 596 l_cmsg.cmsg_len - sizeof(l_cmsg)); 597 if (error) 598 goto done; 599 600 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 601 cidx += cspace; 602 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 603 604 /* If we allocated a buffer, attach to mbuf */ 605 if (cidx > MLEN) { 606 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 607 ctl_mbuf->m_flags |= M_EXT_RW; 608 } 609 control = NULL; 610 ctl_mbuf->m_len = cidx; 611 612 msg.msg_control = ctl_mbuf; 613 msg.msg_flags |= MSG_CONTROLMBUF; 614 615 ktrkuser("mbcontrol", mtod(ctl_mbuf, void *), 616 msg.msg_controllen); 617 } 618 619 skipcmsg: 620 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 621 /* Freed internally */ 622 ctl_mbuf = NULL; 623 624 done: 625 if (ctl_mbuf != NULL) { 626 if (control != NULL && control != mtod(ctl_mbuf, void *)) 627 free(control, M_MBUF); 628 m_free(ctl_mbuf); 629 } 630 return (error); 631 } 632 633 int 634 linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval) 635 { 636 /* { 637 syscallarg(int) s; 638 syscallarg(void *) buf; 639 syscallarg(int) len; 640 syscallarg(int) flags; 641 syscallarg(struct osockaddr *) from; 642 syscallarg(int *) fromlenaddr; 643 } */ 644 int error; 645 struct sys_recvfrom_args bra; 646 647 SCARG(&bra, s) = SCARG(uap, s); 648 SCARG(&bra, buf) = SCARG(uap, buf); 649 SCARG(&bra, len) = SCARG(uap, len); 650 SCARG(&bra, flags) = SCARG(uap, flags); 651 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 652 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 653 654 if ((error = sys_recvfrom(l, &bra, retval))) 655 return (error); 656 657 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 658 return (error); 659 660 return (0); 661 } 662 663 static int 664 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 665 { 666 int dlen, error = 0; 667 struct cmsghdr *cmsg; 668 struct linux_cmsghdr linux_cmsg; 669 struct mbuf *m; 670 char *q, *q_end; 671 672 if (mp->msg_controllen <= 0 || control == 0) { 673 mp->msg_controllen = 0; 674 free_control_mbuf(l, control, control); 675 return 0; 676 } 677 678 ktrkuser("msgcontrol", mtod(control, void *), mp->msg_controllen); 679 680 q = (char *)mp->msg_control; 681 q_end = q + mp->msg_controllen; 682 683 for (m = control; m != NULL; ) { 684 cmsg = mtod(m, struct cmsghdr *); 685 686 /* 687 * Fixup cmsg. We handle two things: 688 * 0. different sizeof cmsg_len. 689 * 1. different values for level/type on some archs 690 * 2. different alignment of CMSG_DATA on some archs 691 */ 692 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 693 linux_cmsg.cmsg_level = cmsg->cmsg_level; 694 linux_cmsg.cmsg_type = cmsg->cmsg_type; 695 696 dlen = q_end - q; 697 if (linux_cmsg.cmsg_len > dlen) { 698 /* Not enough room for the parameter */ 699 dlen -= sizeof linux_cmsg; 700 if (dlen <= 0) 701 /* Discard if header wont fit */ 702 break; 703 mp->msg_flags |= MSG_CTRUNC; 704 if (linux_cmsg.cmsg_level == SOL_SOCKET 705 && linux_cmsg.cmsg_type == SCM_RIGHTS) 706 /* Do not truncate me ... */ 707 break; 708 } else 709 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 710 711 switch (linux_cmsg.cmsg_level) { 712 case SOL_SOCKET: 713 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 714 switch (linux_cmsg.cmsg_type) { 715 case SCM_RIGHTS: 716 /* Linux SCM_RIGHTS is same as NetBSD */ 717 break; 718 719 default: 720 /* other types not supported */ 721 error = EINVAL; 722 goto done; 723 } 724 /* machine dependent ! */ 725 break; 726 default: 727 /* pray and leave intact */ 728 break; 729 } 730 731 /* There can be padding between the header and data... */ 732 error = copyout(&linux_cmsg, q, sizeof linux_cmsg); 733 if (error != 0) { 734 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 735 dlen); 736 } 737 if (error != 0) { 738 /* We must free all the SCM_RIGHTS */ 739 m = control; 740 break; 741 } 742 m = m->m_next; 743 if (m == NULL || q + LINUX_CMSG_SPACE(dlen) > q_end) { 744 q += LINUX_CMSG_LEN(dlen); 745 break; 746 } 747 q += LINUX_CMSG_SPACE(dlen); 748 } 749 750 done: 751 free_control_mbuf(l, control, m); 752 753 mp->msg_controllen = q - (char *)mp->msg_control; 754 return error; 755 } 756 757 int 758 linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval) 759 { 760 /* { 761 syscallarg(int) s; 762 syscallarg(struct linux_msghdr *) msg; 763 syscallarg(u_int) flags; 764 } */ 765 struct msghdr msg; 766 struct linux_msghdr lmsg; 767 int error; 768 struct mbuf *from, *control; 769 770 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 771 if (error) 772 return (error); 773 linux_to_bsd_msghdr(&lmsg, &msg); 774 775 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 776 if (msg.msg_flags < 0) { 777 /* Some unsupported flag */ 778 return (EINVAL); 779 } 780 msg.msg_flags |= MSG_IOVUSRSPACE; 781 782 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 783 msg.msg_control != NULL ? &control : NULL, retval); 784 if (error != 0) 785 return error; 786 787 if (msg.msg_control != NULL) 788 error = linux_copyout_msg_control(l, &msg, control); 789 790 if (error == 0 && from != 0) { 791 mtod(from, struct osockaddr *)->sa_family = 792 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 793 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 794 from); 795 } else 796 msg.msg_namelen = 0; 797 798 if (from != NULL) 799 m_free(from); 800 801 if (error == 0) { 802 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 803 if (msg.msg_flags < 0) 804 /* Some flag unsupported by Linux */ 805 error = EINVAL; 806 else { 807 ktrkuser("msghdr", &msg, sizeof(msg)); 808 bsd_to_linux_msghdr(&msg, &lmsg); 809 error = copyout(&lmsg, SCARG(uap, msg), sizeof(lmsg)); 810 } 811 } 812 813 return (error); 814 } 815 816 /* 817 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 818 * is different, the rest matches IPPROTO_* on both systems. 819 */ 820 int 821 linux_to_bsd_sopt_level(int llevel) 822 { 823 824 switch (llevel) { 825 case LINUX_SOL_SOCKET: 826 return SOL_SOCKET; 827 case LINUX_SOL_IP: 828 return IPPROTO_IP; 829 #ifdef INET6 830 case LINUX_SOL_IPV6: 831 return IPPROTO_IPV6; 832 #endif 833 case LINUX_SOL_TCP: 834 return IPPROTO_TCP; 835 case LINUX_SOL_UDP: 836 return IPPROTO_UDP; 837 default: 838 return -1; 839 } 840 } 841 842 /* 843 * Convert Linux socket level socket option numbers to NetBSD values. 844 */ 845 int 846 linux_to_bsd_so_sockopt(int lopt) 847 { 848 849 switch (lopt) { 850 case LINUX_SO_DEBUG: 851 return SO_DEBUG; 852 case LINUX_SO_REUSEADDR: 853 /* 854 * Linux does not implement SO_REUSEPORT, but allows reuse of a 855 * host:port pair through SO_REUSEADDR even if the address is not a 856 * multicast-address. Effectively, this means that we should use 857 * SO_REUSEPORT to allow Linux applications to not exit with 858 * EADDRINUSE 859 */ 860 return SO_REUSEPORT; 861 case LINUX_SO_TYPE: 862 return SO_TYPE; 863 case LINUX_SO_ERROR: 864 return SO_ERROR; 865 case LINUX_SO_DONTROUTE: 866 return SO_DONTROUTE; 867 case LINUX_SO_BROADCAST: 868 return SO_BROADCAST; 869 case LINUX_SO_SNDBUF: 870 return SO_SNDBUF; 871 case LINUX_SO_RCVBUF: 872 return SO_RCVBUF; 873 case LINUX_SO_SNDLOWAT: 874 return SO_SNDLOWAT; 875 case LINUX_SO_RCVLOWAT: 876 return SO_RCVLOWAT; 877 case LINUX_SO_KEEPALIVE: 878 return SO_KEEPALIVE; 879 case LINUX_SO_OOBINLINE: 880 return SO_OOBINLINE; 881 case LINUX_SO_LINGER: 882 return SO_LINGER; 883 case LINUX_SO_ACCEPTCONN: 884 return SO_ACCEPTCONN; 885 case LINUX_SO_PRIORITY: 886 case LINUX_SO_NO_CHECK: 887 default: 888 return -1; 889 } 890 } 891 892 /* 893 * Convert Linux IP level socket option number to NetBSD values. 894 */ 895 int 896 linux_to_bsd_ip_sockopt(int lopt) 897 { 898 899 switch (lopt) { 900 case LINUX_IP_TOS: 901 return IP_TOS; 902 case LINUX_IP_TTL: 903 return IP_TTL; 904 case LINUX_IP_HDRINCL: 905 return IP_HDRINCL; 906 case LINUX_IP_MULTICAST_TTL: 907 return IP_MULTICAST_TTL; 908 case LINUX_IP_MULTICAST_LOOP: 909 return IP_MULTICAST_LOOP; 910 case LINUX_IP_MULTICAST_IF: 911 return IP_MULTICAST_IF; 912 case LINUX_IP_ADD_MEMBERSHIP: 913 return IP_ADD_MEMBERSHIP; 914 case LINUX_IP_DROP_MEMBERSHIP: 915 return IP_DROP_MEMBERSHIP; 916 default: 917 return -1; 918 } 919 } 920 921 /* 922 * Convert Linux IPV6 level socket option number to NetBSD values. 923 */ 924 #ifdef INET6 925 int 926 linux_to_bsd_ipv6_sockopt(int lopt) 927 { 928 929 switch (lopt) { 930 case LINUX_IPV6_V6ONLY: 931 return IPV6_V6ONLY; 932 default: 933 return -1; 934 } 935 } 936 #endif 937 938 /* 939 * Convert Linux TCP level socket option number to NetBSD values. 940 */ 941 int 942 linux_to_bsd_tcp_sockopt(int lopt) 943 { 944 945 switch (lopt) { 946 case LINUX_TCP_NODELAY: 947 return TCP_NODELAY; 948 case LINUX_TCP_MAXSEG: 949 return TCP_MAXSEG; 950 default: 951 return -1; 952 } 953 } 954 955 /* 956 * Convert Linux UDP level socket option number to NetBSD values. 957 */ 958 int 959 linux_to_bsd_udp_sockopt(int lopt) 960 { 961 962 switch (lopt) { 963 default: 964 return -1; 965 } 966 } 967 968 /* 969 * Another reasonably straightforward function: setsockopt(2). 970 * The level and option numbers are converted; the values passed 971 * are not (yet) converted, the ones currently implemented don't 972 * need conversion, as they are the same on both systems. 973 */ 974 int 975 linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval) 976 { 977 /* { 978 syscallarg(int) s; 979 syscallarg(int) level; 980 syscallarg(int) optname; 981 syscallarg(void *) optval; 982 syscallarg(int) optlen; 983 } */ 984 struct sys_setsockopt_args bsa; 985 int name; 986 987 SCARG(&bsa, s) = SCARG(uap, s); 988 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 989 SCARG(&bsa, val) = SCARG(uap, optval); 990 SCARG(&bsa, valsize) = SCARG(uap, optlen); 991 992 /* 993 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 994 * and returns EOPNOTSUPP for other levels 995 */ 996 if (SCARG(&bsa, level) != SOL_SOCKET) { 997 struct socket *so; 998 int error, family; 999 1000 /* fd_getsock() will use the descriptor for us */ 1001 if ((error = fd_getsock(SCARG(&bsa, s), &so)) != 0) 1002 return error; 1003 family = so->so_proto->pr_domain->dom_family; 1004 fd_putfile(SCARG(&bsa, s)); 1005 1006 if (family == AF_LOCAL) 1007 return EOPNOTSUPP; 1008 } 1009 1010 switch (SCARG(&bsa, level)) { 1011 case SOL_SOCKET: 1012 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1013 break; 1014 case IPPROTO_IP: 1015 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1016 break; 1017 #ifdef INET6 1018 case IPPROTO_IPV6: 1019 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1020 break; 1021 #endif 1022 case IPPROTO_TCP: 1023 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1024 break; 1025 case IPPROTO_UDP: 1026 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1027 break; 1028 default: 1029 return EINVAL; 1030 } 1031 1032 if (name == -1) 1033 return EINVAL; 1034 SCARG(&bsa, name) = name; 1035 1036 return sys_setsockopt(l, &bsa, retval); 1037 } 1038 1039 /* 1040 * getsockopt(2) is very much the same as setsockopt(2) (see above) 1041 */ 1042 int 1043 linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval) 1044 { 1045 /* { 1046 syscallarg(int) s; 1047 syscallarg(int) level; 1048 syscallarg(int) optname; 1049 syscallarg(void *) optval; 1050 syscallarg(int *) optlen; 1051 } */ 1052 struct sys_getsockopt_args bga; 1053 int name; 1054 1055 SCARG(&bga, s) = SCARG(uap, s); 1056 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 1057 SCARG(&bga, val) = SCARG(uap, optval); 1058 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 1059 1060 switch (SCARG(&bga, level)) { 1061 case SOL_SOCKET: 1062 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1063 break; 1064 case IPPROTO_IP: 1065 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1066 break; 1067 #ifdef INET6 1068 case IPPROTO_IPV6: 1069 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1070 break; 1071 #endif 1072 case IPPROTO_TCP: 1073 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1074 break; 1075 case IPPROTO_UDP: 1076 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1077 break; 1078 default: 1079 return EINVAL; 1080 } 1081 1082 if (name == -1) 1083 return EINVAL; 1084 SCARG(&bga, name) = name; 1085 1086 return sys_getsockopt(l, &bga, retval); 1087 } 1088 1089 int 1090 linux_getifname(struct lwp *l, register_t *retval, void *data) 1091 { 1092 struct ifnet *ifp; 1093 struct linux_ifreq ifr; 1094 int error; 1095 int s; 1096 1097 error = copyin(data, &ifr, sizeof(ifr)); 1098 if (error) 1099 return error; 1100 1101 s = pserialize_read_enter(); 1102 ifp = if_byindex(ifr.ifr_ifru.ifru_ifindex); 1103 if (ifp == NULL) { 1104 pserialize_read_exit(s); 1105 return ENODEV; 1106 } 1107 1108 strncpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 1109 pserialize_read_exit(s); 1110 1111 return copyout(&ifr, data, sizeof(ifr)); 1112 } 1113 1114 int 1115 linux_getifconf(struct lwp *l, register_t *retval, void *data) 1116 { 1117 struct linux_ifreq ifr, *ifrp = NULL; 1118 struct linux_ifconf ifc; 1119 struct ifnet *ifp; 1120 struct sockaddr *sa; 1121 struct osockaddr *osa; 1122 int space = 0, error; 1123 const int sz = (int)sizeof(ifr); 1124 bool docopy; 1125 int s; 1126 int bound; 1127 struct psref psref; 1128 1129 error = copyin(data, &ifc, sizeof(ifc)); 1130 if (error) 1131 return error; 1132 1133 docopy = ifc.ifc_req != NULL; 1134 if (docopy) { 1135 space = ifc.ifc_len; 1136 ifrp = ifc.ifc_req; 1137 } 1138 1139 bound = curlwp_bind(); 1140 s = pserialize_read_enter(); 1141 IFNET_READER_FOREACH(ifp) { 1142 struct ifaddr *ifa; 1143 psref_acquire(&psref, &ifp->if_psref, ifnet_psref_class); 1144 1145 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1146 sizeof(ifr.ifr_name)); 1147 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') { 1148 error = ENAMETOOLONG; 1149 goto release_exit; 1150 } 1151 1152 IFADDR_READER_FOREACH(ifa, ifp) { 1153 struct psref psref_ifa; 1154 ifa_acquire(ifa, &psref_ifa); 1155 pserialize_read_exit(s); 1156 1157 sa = ifa->ifa_addr; 1158 if (sa->sa_family != AF_INET || 1159 sa->sa_len > sizeof(*osa)) 1160 goto next; 1161 memcpy(&ifr.ifr_addr, sa, sa->sa_len); 1162 osa = (struct osockaddr *)&ifr.ifr_addr; 1163 osa->sa_family = sa->sa_family; 1164 if (space >= sz) { 1165 error = copyout(&ifr, ifrp, sz); 1166 if (error != 0) { 1167 s = pserialize_read_enter(); 1168 ifa_release(ifa, &psref_ifa); 1169 goto release_exit; 1170 } 1171 ifrp++; 1172 } 1173 space -= sz; 1174 next: 1175 s = pserialize_read_enter(); 1176 ifa_release(ifa, &psref_ifa); 1177 } 1178 1179 psref_release(&psref, &ifp->if_psref, ifnet_psref_class); 1180 } 1181 pserialize_read_exit(s); 1182 curlwp_bindx(bound); 1183 1184 if (docopy) 1185 ifc.ifc_len -= space; 1186 else 1187 ifc.ifc_len = -space; 1188 1189 return copyout(&ifc, data, sizeof(ifc)); 1190 1191 release_exit: 1192 pserialize_read_exit(s); 1193 psref_release(&psref, &ifp->if_psref, ifnet_psref_class); 1194 curlwp_bindx(bound); 1195 return error; 1196 } 1197 1198 int 1199 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 1200 void *data) 1201 { 1202 /* Not the full structure, just enough to map what we do here */ 1203 struct linux_ifreq lreq; 1204 file_t *fp; 1205 struct ifaddr *ifa; 1206 struct ifnet *ifp; 1207 struct sockaddr_dl *sadl; 1208 int error, found; 1209 int index, ifnum; 1210 int s; 1211 1212 /* 1213 * We can't emulate this ioctl by calling sys_ioctl() to run 1214 * SIOCGIFCONF, because the user buffer is not of the right 1215 * type to take those results. We can't use kernel buffers to 1216 * receive the results, as the implementation of sys_ioctl() 1217 * and ifconf() [which implements SIOCGIFCONF] use 1218 * copyin()/copyout() which will fail on kernel addresses. 1219 * 1220 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1221 */ 1222 1223 if ((fp = fd_getfile(fd)) == NULL) 1224 return (EBADF); 1225 1226 KERNEL_LOCK(1, NULL); 1227 1228 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1229 error = EBADF; 1230 goto out; 1231 } 1232 1233 error = copyin(data, &lreq, sizeof(lreq)); 1234 if (error) 1235 goto out; 1236 lreq.ifr_name[LINUX_IFNAMSIZ-1] = '\0'; /* just in case */ 1237 1238 /* 1239 * Try real interface name first, then fake "ethX" 1240 */ 1241 found = 0; 1242 s = pserialize_read_enter(); 1243 IFNET_READER_FOREACH(ifp) { 1244 if (found) 1245 break; 1246 if (strcmp(lreq.ifr_name, ifp->if_xname)) 1247 /* not this interface */ 1248 continue; 1249 1250 found=1; 1251 if (IFADDR_READER_EMPTY(ifp)) { 1252 pserialize_read_exit(s); 1253 error = ENODEV; 1254 goto out; 1255 } 1256 IFADDR_READER_FOREACH(ifa, ifp) { 1257 sadl = satosdl(ifa->ifa_addr); 1258 /* only return ethernet addresses */ 1259 /* XXX what about FDDI, etc. ? */ 1260 if (sadl->sdl_family != AF_LINK || 1261 sadl->sdl_type != IFT_ETHER) 1262 continue; 1263 memcpy(&lreq.ifr_hwaddr.sa_data, CLLADDR(sadl), 1264 MIN(sadl->sdl_alen, 1265 sizeof(lreq.ifr_hwaddr.sa_data))); 1266 lreq.ifr_hwaddr.sa_family = 1267 sadl->sdl_family; 1268 pserialize_read_exit(s); 1269 1270 error = copyout(&lreq, data, sizeof(lreq)); 1271 goto out; 1272 } 1273 } 1274 pserialize_read_exit(s); 1275 1276 if (strncmp(lreq.ifr_name, "eth", 3) != 0) { 1277 /* unknown interface, not even an "eth*" name */ 1278 error = ENODEV; 1279 goto out; 1280 } 1281 1282 for (ifnum = 0, index = 3; 1283 index < LINUX_IFNAMSIZ && lreq.ifr_name[index] != '\0'; 1284 index++) { 1285 ifnum *= 10; 1286 ifnum += lreq.ifr_name[index] - '0'; 1287 } 1288 1289 error = EINVAL; /* in case we don't find one */ 1290 s = pserialize_read_enter(); 1291 IFNET_READER_FOREACH(ifp) { 1292 memcpy(lreq.ifr_name, ifp->if_xname, 1293 MIN(LINUX_IFNAMSIZ, IFNAMSIZ)); 1294 IFADDR_READER_FOREACH(ifa, ifp) { 1295 sadl = satosdl(ifa->ifa_addr); 1296 /* only return ethernet addresses */ 1297 /* XXX what about FDDI, etc. ? */ 1298 if (sadl->sdl_family != AF_LINK || 1299 sadl->sdl_type != IFT_ETHER) 1300 continue; 1301 if (ifnum--) 1302 /* not the reqested iface */ 1303 continue; 1304 memcpy(&lreq.ifr_hwaddr.sa_data, 1305 CLLADDR(sadl), 1306 MIN(sadl->sdl_alen, 1307 sizeof(lreq.ifr_hwaddr.sa_data))); 1308 lreq.ifr_hwaddr.sa_family = 1309 sadl->sdl_family; 1310 pserialize_read_exit(s); 1311 1312 error = copyout(&lreq, data, sizeof(lreq)); 1313 goto out; 1314 } 1315 } 1316 pserialize_read_exit(s); 1317 1318 out: 1319 KERNEL_UNLOCK_ONE(NULL); 1320 fd_putfile(fd); 1321 return error; 1322 } 1323 1324 int 1325 linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) 1326 { 1327 /* { 1328 syscallarg(int) fd; 1329 syscallarg(u_long) com; 1330 syscallarg(void *) data; 1331 } */ 1332 u_long com; 1333 int error = 0, isdev = 0, dosys = 1; 1334 struct sys_ioctl_args ia; 1335 file_t *fp; 1336 struct vnode *vp; 1337 int (*ioctlf)(file_t *, u_long, void *); 1338 struct ioctl_pt pt; 1339 1340 if ((fp = fd_getfile(SCARG(uap, fd))) == NULL) 1341 return (EBADF); 1342 1343 if (fp->f_type == DTYPE_VNODE) { 1344 vp = (struct vnode *)fp->f_data; 1345 isdev = vp->v_type == VCHR; 1346 } 1347 1348 /* 1349 * Don't try to interpret socket ioctl calls that are done 1350 * on a device filedescriptor, just pass them through, to 1351 * emulate Linux behaviour. Use PTIOCLINUX so that the 1352 * device will only handle these if it's prepared to do 1353 * so, to avoid unexpected things from happening. 1354 */ 1355 if (isdev) { 1356 dosys = 0; 1357 ioctlf = fp->f_ops->fo_ioctl; 1358 pt.com = SCARG(uap, com); 1359 pt.data = SCARG(uap, data); 1360 error = ioctlf(fp, PTIOCLINUX, &pt); 1361 /* 1362 * XXX hack: if the function returns EJUSTRETURN, 1363 * it has stuffed a sysctl return value in pt.data. 1364 */ 1365 if (error == EJUSTRETURN) { 1366 retval[0] = (register_t)pt.data; 1367 error = 0; 1368 } 1369 goto out; 1370 } 1371 1372 com = SCARG(uap, com); 1373 retval[0] = 0; 1374 1375 switch (com) { 1376 case LINUX_SIOCGIFNAME: 1377 error = linux_getifname(l, retval, SCARG(uap, data)); 1378 dosys = 0; 1379 break; 1380 case LINUX_SIOCGIFCONF: 1381 error = linux_getifconf(l, retval, SCARG(uap, data)); 1382 dosys = 0; 1383 break; 1384 case LINUX_SIOCGIFFLAGS: 1385 SCARG(&ia, com) = OSIOCGIFFLAGS; 1386 break; 1387 case LINUX_SIOCSIFFLAGS: 1388 SCARG(&ia, com) = OSIOCSIFFLAGS; 1389 break; 1390 case LINUX_SIOCGIFADDR: 1391 SCARG(&ia, com) = OOSIOCGIFADDR; 1392 break; 1393 case LINUX_SIOCGIFDSTADDR: 1394 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1395 break; 1396 case LINUX_SIOCGIFBRDADDR: 1397 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1398 break; 1399 case LINUX_SIOCGIFNETMASK: 1400 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1401 break; 1402 case LINUX_SIOCGIFMTU: 1403 SCARG(&ia, com) = OSIOCGIFMTU; 1404 break; 1405 case LINUX_SIOCADDMULTI: 1406 SCARG(&ia, com) = OSIOCADDMULTI; 1407 break; 1408 case LINUX_SIOCDELMULTI: 1409 SCARG(&ia, com) = OSIOCDELMULTI; 1410 break; 1411 case LINUX_SIOCGIFHWADDR: 1412 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1413 SCARG(uap, data)); 1414 dosys = 0; 1415 break; 1416 default: 1417 error = EINVAL; 1418 } 1419 1420 out: 1421 fd_putfile(SCARG(uap, fd)); 1422 1423 if (error ==0 && dosys) { 1424 SCARG(&ia, fd) = SCARG(uap, fd); 1425 SCARG(&ia, data) = SCARG(uap, data); 1426 error = sys_ioctl(curlwp, &ia, retval); 1427 } 1428 1429 return error; 1430 } 1431 1432 int 1433 linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval) 1434 { 1435 /* { 1436 syscallarg(int) s; 1437 syscallarg(const struct sockaddr *) name; 1438 syscallarg(int) namelen; 1439 } */ 1440 int error; 1441 struct sockaddr_big sb; 1442 1443 error = linux_get_sa(l, SCARG(uap, s), &sb, SCARG(uap, name), 1444 SCARG(uap, namelen)); 1445 if (error) 1446 return (error); 1447 1448 error = do_sys_connect(l, SCARG(uap, s), (struct sockaddr *)&sb); 1449 1450 if (error == EISCONN) { 1451 struct socket *so; 1452 int state, prflags; 1453 1454 /* fd_getsock() will use the descriptor for us */ 1455 if (fd_getsock(SCARG(uap, s), &so) != 0) 1456 return EISCONN; 1457 1458 solock(so); 1459 state = so->so_state; 1460 prflags = so->so_proto->pr_flags; 1461 sounlock(so); 1462 fd_putfile(SCARG(uap, s)); 1463 /* 1464 * We should only let this call succeed once per 1465 * non-blocking connect; however we don't have 1466 * a convenient place to keep that state.. 1467 */ 1468 if ((state & (SS_ISCONNECTED|SS_NBIO)) == 1469 (SS_ISCONNECTED|SS_NBIO) && 1470 (prflags & PR_CONNREQUIRED)) 1471 return 0; 1472 } 1473 1474 return (error); 1475 } 1476 1477 int 1478 linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval) 1479 { 1480 /* { 1481 syscallarg(int) s; 1482 syscallarg(const struct osockaddr *) name; 1483 syscallarg(int) namelen; 1484 } */ 1485 int error; 1486 struct sockaddr_big sb; 1487 1488 error = linux_get_sa(l, SCARG(uap, s), &sb, SCARG(uap, name), 1489 SCARG(uap, namelen)); 1490 if (error) 1491 return (error); 1492 1493 return do_sys_bind(l, SCARG(uap, s), (struct sockaddr *)&sb); 1494 } 1495 1496 int 1497 linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval) 1498 { 1499 /* { 1500 syscallarg(int) fdes; 1501 syscallarg(void *) asa; 1502 syscallarg(int *) alen; 1503 } */ 1504 int error; 1505 1506 if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0) 1507 return (error); 1508 1509 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1510 return (error); 1511 1512 return (0); 1513 } 1514 1515 int 1516 linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval) 1517 { 1518 /* { 1519 syscallarg(int) fdes; 1520 syscallarg(void *) asa; 1521 syscallarg(int *) alen; 1522 } */ 1523 int error; 1524 1525 if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0) 1526 return (error); 1527 1528 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1529 return (error); 1530 1531 return (0); 1532 } 1533 1534 /* 1535 * Copy the osockaddr structure pointed to by name to sb, adjust 1536 * family and convert to sockaddr. 1537 */ 1538 static int 1539 linux_get_sa(struct lwp *l, int s, struct sockaddr_big *sb, 1540 const struct osockaddr *name, socklen_t namelen) 1541 { 1542 int error, bdom; 1543 1544 if (namelen > UCHAR_MAX || 1545 namelen <= offsetof(struct sockaddr_big, sb_data)) 1546 return EINVAL; 1547 1548 error = copyin(name, sb, namelen); 1549 if (error) 1550 return error; 1551 1552 bdom = linux_to_bsd_domain(sb->sb_family); 1553 if (bdom == -1) 1554 return EINVAL; 1555 1556 /* 1557 * If the family is unspecified, use address family of the socket. 1558 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1559 */ 1560 if (bdom == AF_UNSPEC) { 1561 struct socket *so; 1562 1563 /* fd_getsock() will use the descriptor for us */ 1564 if ((error = fd_getsock(s, &so)) != 0) 1565 return error; 1566 1567 bdom = so->so_proto->pr_domain->dom_family; 1568 fd_putfile(s); 1569 } 1570 1571 /* 1572 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1573 * which lacks the scope id compared with RFC2553 one. If we detect 1574 * the situation, reject the address and write a message to system log. 1575 * 1576 * Still accept addresses for which the scope id is not used. 1577 */ 1578 if (bdom == AF_INET6 && 1579 namelen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { 1580 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sb; 1581 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1582 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1583 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1584 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1585 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1586 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1587 struct proc *p = l->l_proc; 1588 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1589 1590 log(LOG_DEBUG, 1591 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1592 "sockaddr_in6 rejected", 1593 p->p_pid, p->p_comm, uid); 1594 return EINVAL; 1595 } 1596 namelen = sizeof(struct sockaddr_in6); 1597 sin6->sin6_scope_id = 0; 1598 } 1599 1600 if (bdom == AF_INET) 1601 namelen = sizeof(struct sockaddr_in); 1602 1603 sb->sb_family = bdom; 1604 sb->sb_len = namelen; 1605 ktrkuser("mbsoname", sb, namelen); 1606 return 0; 1607 } 1608 1609 static int 1610 linux_sa_put(struct osockaddr *osa) 1611 { 1612 struct sockaddr sa; 1613 struct osockaddr *kosa; 1614 int error, bdom, len; 1615 1616 /* 1617 * Only read/write the sockaddr family and length part, the rest is 1618 * not changed. 1619 */ 1620 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1621 1622 error = copyin(osa, &sa, len); 1623 if (error) 1624 return (error); 1625 1626 bdom = bsd_to_linux_domain(sa.sa_family); 1627 if (bdom == -1) 1628 return (EINVAL); 1629 1630 /* Note: we convert from sockaddr to osockaddr here, too */ 1631 kosa = (struct osockaddr *) &sa; 1632 kosa->sa_family = bdom; 1633 error = copyout(kosa, osa, len); 1634 if (error) 1635 return (error); 1636 1637 return (0); 1638 } 1639 1640 #ifndef __amd64__ 1641 int 1642 linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval) 1643 { 1644 /* { 1645 syscallarg(int) s; 1646 syscallarg(void *) buf; 1647 syscallarg(int) len; 1648 syscallarg(int) flags; 1649 } */ 1650 struct sys_recvfrom_args bra; 1651 1652 1653 SCARG(&bra, s) = SCARG(uap, s); 1654 SCARG(&bra, buf) = SCARG(uap, buf); 1655 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1656 SCARG(&bra, flags) = SCARG(uap, flags); 1657 SCARG(&bra, from) = NULL; 1658 SCARG(&bra, fromlenaddr) = NULL; 1659 1660 return (sys_recvfrom(l, &bra, retval)); 1661 } 1662 1663 int 1664 linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval) 1665 { 1666 /* { 1667 syscallarg(int) s; 1668 syscallarg(void *) buf; 1669 syscallarg(int) len; 1670 syscallarg(int) flags; 1671 } */ 1672 struct sys_sendto_args bsa; 1673 1674 SCARG(&bsa, s) = SCARG(uap, s); 1675 SCARG(&bsa, buf) = SCARG(uap, buf); 1676 SCARG(&bsa, len) = SCARG(uap, len); 1677 SCARG(&bsa, flags) = SCARG(uap, flags); 1678 SCARG(&bsa, to) = NULL; 1679 SCARG(&bsa, tolen) = 0; 1680 1681 return (sys_sendto(l, &bsa, retval)); 1682 } 1683 #endif 1684 1685 int 1686 linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval) 1687 { 1688 /* { 1689 syscallarg(int) s; 1690 syscallarg(struct osockaddr *) name; 1691 syscallarg(int *) anamelen; 1692 } */ 1693 int error; 1694 struct sys_accept_args baa; 1695 1696 SCARG(&baa, s) = SCARG(uap, s); 1697 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1698 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1699 1700 if ((error = sys_accept(l, &baa, retval))) 1701 return (error); 1702 1703 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1704 return (error); 1705 1706 return (0); 1707 } 1708