1 /* $NetBSD: linux_socket.c,v 1.118 2014/05/17 21:26:20 rmind 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 1.118 2014/05/17 21:26:20 rmind 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/malloc.h> 49 #include <sys/ioctl.h> 50 #include <sys/tty.h> 51 #include <sys/file.h> 52 #include <sys/filedesc.h> 53 #include <sys/select.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 #include <sys/domain.h> 57 #include <net/if.h> 58 #include <net/if_dl.h> 59 #include <net/if_types.h> 60 #include <netinet/in.h> 61 #include <netinet/tcp.h> 62 #include <sys/mount.h> 63 #include <sys/proc.h> 64 #include <sys/vnode.h> 65 #include <sys/device.h> 66 #include <sys/protosw.h> 67 #include <sys/mbuf.h> 68 #include <sys/syslog.h> 69 #include <sys/exec.h> 70 #include <sys/kauth.h> 71 #include <sys/syscallargs.h> 72 #include <sys/ktrace.h> 73 #include <sys/fcntl.h> 74 75 #include <lib/libkern/libkern.h> 76 77 #include <netinet/ip6.h> 78 #include <netinet6/ip6_var.h> 79 80 #include <compat/sys/socket.h> 81 #include <compat/sys/sockio.h> 82 83 #include <compat/linux/common/linux_types.h> 84 #include <compat/linux/common/linux_util.h> 85 #include <compat/linux/common/linux_signal.h> 86 #include <compat/linux/common/linux_ioctl.h> 87 #include <compat/linux/common/linux_socket.h> 88 #include <compat/linux/common/linux_fcntl.h> 89 #if !defined(__alpha__) && !defined(__amd64__) 90 #include <compat/linux/common/linux_socketcall.h> 91 #endif 92 #include <compat/linux/common/linux_sockio.h> 93 #include <compat/linux/common/linux_ipc.h> 94 #include <compat/linux/common/linux_sem.h> 95 96 #include <compat/linux/linux_syscallargs.h> 97 98 #ifdef DEBUG_LINUX 99 #define DPRINTF(a) uprintf a 100 #else 101 #define DPRINTF(a) 102 #endif 103 104 /* 105 * The calls in this file are entered either via the linux_socketcall() 106 * interface or, on the Alpha, as individual syscalls. The 107 * linux_socketcall function does any massaging of arguments so that all 108 * the calls in here need not think that they are anything other 109 * than a normal syscall. 110 */ 111 112 static int linux_to_bsd_domain(int); 113 static int bsd_to_linux_domain(int); 114 int linux_to_bsd_sopt_level(int); 115 int linux_to_bsd_so_sockopt(int); 116 int linux_to_bsd_ip_sockopt(int); 117 int linux_to_bsd_ipv6_sockopt(int); 118 int linux_to_bsd_tcp_sockopt(int); 119 int linux_to_bsd_udp_sockopt(int); 120 int linux_getifname(struct lwp *, register_t *, void *); 121 int linux_getifconf(struct lwp *, register_t *, void *); 122 int linux_getifhwaddr(struct lwp *, register_t *, u_int, void *); 123 static int linux_get_sa(struct lwp *, int, struct mbuf **, 124 const struct osockaddr *, unsigned int); 125 static int linux_sa_put(struct osockaddr *osa); 126 static int linux_to_bsd_msg_flags(int); 127 static int bsd_to_linux_msg_flags(int); 128 static void linux_to_bsd_msghdr(struct linux_msghdr *, struct msghdr *); 129 static void bsd_to_linux_msghdr(struct msghdr *, struct linux_msghdr *); 130 131 static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { 132 AF_UNSPEC, 133 AF_UNIX, 134 AF_INET, 135 AF_CCITT, /* LINUX_AF_AX25 */ 136 AF_IPX, 137 AF_APPLETALK, 138 -1, /* LINUX_AF_NETROM */ 139 -1, /* LINUX_AF_BRIDGE */ 140 -1, /* LINUX_AF_ATMPVC */ 141 AF_CCITT, /* LINUX_AF_X25 */ 142 AF_INET6, 143 -1, /* LINUX_AF_ROSE */ 144 AF_DECnet, 145 -1, /* LINUX_AF_NETBEUI */ 146 -1, /* LINUX_AF_SECURITY */ 147 pseudo_AF_KEY, 148 AF_ROUTE, /* LINUX_AF_NETLINK */ 149 -1, /* LINUX_AF_PACKET */ 150 -1, /* LINUX_AF_ASH */ 151 -1, /* LINUX_AF_ECONET */ 152 -1, /* LINUX_AF_ATMSVC */ 153 AF_SNA, 154 /* rest up to LINUX_AF_MAX-1 is not allocated */ 155 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 156 }; 157 158 static const int bsd_to_linux_domain_[AF_MAX] = { 159 LINUX_AF_UNSPEC, 160 LINUX_AF_UNIX, 161 LINUX_AF_INET, 162 -1, /* AF_IMPLINK */ 163 -1, /* AF_PUP */ 164 -1, /* AF_CHAOS */ 165 -1, /* AF_NS */ 166 -1, /* AF_ISO */ 167 -1, /* AF_ECMA */ 168 -1, /* AF_DATAKIT */ 169 LINUX_AF_AX25, /* AF_CCITT */ 170 LINUX_AF_SNA, 171 LINUX_AF_DECnet, 172 -1, /* AF_DLI */ 173 -1, /* AF_LAT */ 174 -1, /* AF_HYLINK */ 175 LINUX_AF_APPLETALK, 176 LINUX_AF_NETLINK, 177 -1, /* AF_LINK */ 178 -1, /* AF_XTP */ 179 -1, /* AF_COIP */ 180 -1, /* AF_CNT */ 181 -1, /* pseudo_AF_RTIP */ 182 LINUX_AF_IPX, 183 LINUX_AF_INET6, 184 -1, /* pseudo_AF_PIP */ 185 -1, /* AF_ISDN */ 186 -1, /* AF_NATM */ 187 -1, /* AF_ARP */ 188 LINUX_pseudo_AF_KEY, 189 -1, /* pseudo_AF_HDRCMPLT */ 190 }; 191 192 static const struct { 193 int bfl; 194 int lfl; 195 } bsd_to_linux_msg_flags_[] = { 196 {MSG_OOB, LINUX_MSG_OOB}, 197 {MSG_PEEK, LINUX_MSG_PEEK}, 198 {MSG_DONTROUTE, LINUX_MSG_DONTROUTE}, 199 {MSG_EOR, LINUX_MSG_EOR}, 200 {MSG_TRUNC, LINUX_MSG_TRUNC}, 201 {MSG_CTRUNC, LINUX_MSG_CTRUNC}, 202 {MSG_WAITALL, LINUX_MSG_WAITALL}, 203 {MSG_DONTWAIT, LINUX_MSG_DONTWAIT}, 204 {MSG_BCAST, 0}, /* not supported, clear */ 205 {MSG_MCAST, 0}, /* not supported, clear */ 206 {MSG_NOSIGNAL, LINUX_MSG_NOSIGNAL}, 207 {-1, /* not supp */ LINUX_MSG_PROBE}, 208 {-1, /* not supp */ LINUX_MSG_FIN}, 209 {-1, /* not supp */ LINUX_MSG_SYN}, 210 {-1, /* not supp */ LINUX_MSG_CONFIRM}, 211 {-1, /* not supp */ LINUX_MSG_RST}, 212 {-1, /* not supp */ LINUX_MSG_ERRQUEUE}, 213 {-1, /* not supp */ LINUX_MSG_MORE}, 214 }; 215 216 /* 217 * Convert between Linux and BSD socket domain values 218 */ 219 static int 220 linux_to_bsd_domain(int ldom) 221 { 222 if (ldom < 0 || ldom >= LINUX_AF_MAX) 223 return (-1); 224 225 return linux_to_bsd_domain_[ldom]; 226 } 227 228 /* 229 * Convert between BSD and Linux socket domain values 230 */ 231 static int 232 bsd_to_linux_domain(int bdom) 233 { 234 if (bdom < 0 || bdom >= AF_MAX) 235 return (-1); 236 237 return bsd_to_linux_domain_[bdom]; 238 } 239 240 static int 241 linux_to_bsd_msg_flags(int lflag) 242 { 243 int i, lfl, bfl; 244 int bflag = 0; 245 246 if (lflag == 0) 247 return (0); 248 249 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 250 bfl = bsd_to_linux_msg_flags_[i].bfl; 251 lfl = bsd_to_linux_msg_flags_[i].lfl; 252 253 if (lfl == 0) 254 continue; 255 256 if (lflag & lfl) { 257 if (bfl < 0) 258 return (-1); 259 260 bflag |= bfl; 261 } 262 } 263 264 return (bflag); 265 } 266 267 static int 268 bsd_to_linux_msg_flags(int bflag) 269 { 270 int i, lfl, bfl; 271 int lflag = 0; 272 273 if (bflag == 0) 274 return (0); 275 276 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 277 bfl = bsd_to_linux_msg_flags_[i].bfl; 278 lfl = bsd_to_linux_msg_flags_[i].lfl; 279 280 if (bfl <= 0) 281 continue; 282 283 if (bflag & bfl) { 284 if (lfl < 0) 285 return (-1); 286 287 lflag |= lfl; 288 } 289 } 290 291 return (lflag); 292 } 293 294 int 295 linux_sys_socket(struct lwp *l, const struct linux_sys_socket_args *uap, register_t *retval) 296 { 297 /* { 298 syscallarg(int) domain; 299 syscallarg(int) type; 300 syscallarg(int) protocol; 301 } */ 302 struct sys___socket30_args bsa; 303 struct sys_fcntl_args fsa; 304 register_t fretval[2]; 305 int error, flags; 306 307 308 SCARG(&bsa, protocol) = SCARG(uap, protocol); 309 SCARG(&bsa, type) = SCARG(uap, type) & LINUX_SOCK_TYPE_MASK; 310 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 311 if (SCARG(&bsa, domain) == -1) 312 return EINVAL; 313 /* 314 * Apparently linux uses this to talk to ISDN sockets. If we fail 315 * now programs seems to handle it, but if we don't we are going 316 * to fail when we bind and programs don't handle this well. 317 */ 318 if (SCARG(&bsa, domain) == AF_ROUTE && SCARG(&bsa, type) == SOCK_RAW) 319 return ENOTSUP; 320 flags = SCARG(uap, type) & ~LINUX_SOCK_TYPE_MASK; 321 if (flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 322 return EINVAL; 323 error = sys___socket30(l, &bsa, retval); 324 325 /* 326 * Linux overloads the "type" parameter to include some 327 * fcntl flags to be set on the file descriptor. 328 * Process those if creating the socket succeeded. 329 */ 330 331 if (!error && flags & LINUX_SOCK_CLOEXEC) { 332 SCARG(&fsa, fd) = *retval; 333 SCARG(&fsa, cmd) = F_SETFD; 334 SCARG(&fsa, arg) = (void *)(uintptr_t)FD_CLOEXEC; 335 (void) sys_fcntl(l, &fsa, fretval); 336 } 337 if (!error && flags & LINUX_SOCK_NONBLOCK) { 338 SCARG(&fsa, fd) = *retval; 339 SCARG(&fsa, cmd) = F_SETFL; 340 SCARG(&fsa, arg) = (void *)(uintptr_t)O_NONBLOCK; 341 error = sys_fcntl(l, &fsa, fretval); 342 if (error) { 343 struct sys_close_args csa; 344 345 SCARG(&csa, fd) = *retval; 346 (void) sys_close(l, &csa, fretval); 347 } 348 } 349 350 #ifdef INET6 351 /* 352 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 353 * default and some apps depend on this. So, set V6ONLY to 0 354 * for Linux apps if the sysctl value is set to 1. 355 */ 356 if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { 357 struct socket *so; 358 359 if (fd_getsock(*retval, &so) == 0) { 360 int val = 0; 361 362 /* ignore error */ 363 (void)so_setsockopt(l, so, IPPROTO_IPV6, IPV6_V6ONLY, 364 &val, sizeof(val)); 365 366 fd_putfile(*retval); 367 } 368 } 369 #endif 370 371 return (error); 372 } 373 374 int 375 linux_sys_socketpair(struct lwp *l, const struct linux_sys_socketpair_args *uap, register_t *retval) 376 { 377 /* { 378 syscallarg(int) domain; 379 syscallarg(int) type; 380 syscallarg(int) protocol; 381 syscallarg(int *) rsv; 382 } */ 383 struct sys_socketpair_args bsa; 384 385 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 386 if (SCARG(&bsa, domain) == -1) 387 return EINVAL; 388 SCARG(&bsa, type) = SCARG(uap, type); 389 SCARG(&bsa, protocol) = SCARG(uap, protocol); 390 SCARG(&bsa, rsv) = SCARG(uap, rsv); 391 392 return sys_socketpair(l, &bsa, retval); 393 } 394 395 int 396 linux_sys_sendto(struct lwp *l, const struct linux_sys_sendto_args *uap, register_t *retval) 397 { 398 /* { 399 syscallarg(int) s; 400 syscallarg(void *) msg; 401 syscallarg(int) len; 402 syscallarg(int) flags; 403 syscallarg(struct osockaddr *) to; 404 syscallarg(int) tolen; 405 } */ 406 struct msghdr msg; 407 struct iovec aiov; 408 struct mbuf *nam; 409 int bflags; 410 int error; 411 412 /* Translate message flags. */ 413 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 414 if (bflags < 0) 415 /* Some supported flag */ 416 return EINVAL; 417 418 msg.msg_flags = 0; 419 msg.msg_name = NULL; 420 msg.msg_control = NULL; 421 422 if (SCARG(uap, tolen)) { 423 /* Read in and convert the sockaddr */ 424 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to), 425 SCARG(uap, tolen)); 426 if (error) 427 return (error); 428 msg.msg_flags |= MSG_NAMEMBUF; 429 msg.msg_name = nam; 430 msg.msg_namelen = SCARG(uap, tolen); 431 } 432 433 msg.msg_iov = &aiov; 434 msg.msg_iovlen = 1; 435 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 436 aiov.iov_len = SCARG(uap, len); 437 438 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 439 } 440 441 static void 442 linux_to_bsd_msghdr(struct linux_msghdr *lmsg, struct msghdr *bmsg) 443 { 444 bmsg->msg_name = lmsg->msg_name; 445 bmsg->msg_namelen = lmsg->msg_namelen; 446 bmsg->msg_iov = lmsg->msg_iov; 447 bmsg->msg_iovlen = lmsg->msg_iovlen; 448 bmsg->msg_control = lmsg->msg_control; 449 bmsg->msg_controllen = lmsg->msg_controllen; 450 bmsg->msg_flags = lmsg->msg_flags; 451 } 452 453 static void 454 bsd_to_linux_msghdr(struct msghdr *bmsg, struct linux_msghdr *lmsg) 455 { 456 lmsg->msg_name = bmsg->msg_name; 457 lmsg->msg_namelen = bmsg->msg_namelen; 458 lmsg->msg_iov = bmsg->msg_iov; 459 lmsg->msg_iovlen = bmsg->msg_iovlen; 460 lmsg->msg_control = bmsg->msg_control; 461 lmsg->msg_controllen = bmsg->msg_controllen; 462 lmsg->msg_flags = bmsg->msg_flags; 463 } 464 465 int 466 linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval) 467 { 468 /* { 469 syscallarg(int) s; 470 syscallarg(struct linux_msghdr *) msg; 471 syscallarg(u_int) flags; 472 } */ 473 struct msghdr msg; 474 struct linux_msghdr lmsg; 475 int error; 476 int bflags; 477 struct mbuf *nam; 478 u_int8_t *control; 479 struct mbuf *ctl_mbuf = NULL; 480 481 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 482 if (error) 483 return error; 484 linux_to_bsd_msghdr(&lmsg, &msg); 485 486 msg.msg_flags = MSG_IOVUSRSPACE; 487 488 /* 489 * Translate message flags. 490 */ 491 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 492 if (bflags < 0) 493 /* Some supported flag */ 494 return EINVAL; 495 496 if (lmsg.msg_name) { 497 /* Read in and convert the sockaddr */ 498 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 499 msg.msg_namelen); 500 if (error) 501 return (error); 502 msg.msg_flags |= MSG_NAMEMBUF; 503 msg.msg_name = nam; 504 } 505 506 /* 507 * Handle cmsg if there is any. 508 */ 509 if (LINUX_CMSG_FIRSTHDR(&lmsg)) { 510 struct linux_cmsghdr l_cmsg, *l_cc; 511 struct cmsghdr *cmsg; 512 ssize_t resid = msg.msg_controllen; 513 size_t clen, cidx = 0, cspace; 514 515 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 516 clen = MLEN; 517 control = mtod(ctl_mbuf, void *); 518 519 l_cc = LINUX_CMSG_FIRSTHDR(&lmsg); 520 do { 521 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 522 if (error) 523 goto done; 524 525 /* 526 * Sanity check the control message length. 527 */ 528 if (l_cmsg.cmsg_len > resid 529 || l_cmsg.cmsg_len < sizeof l_cmsg) { 530 error = EINVAL; 531 goto done; 532 } 533 534 /* 535 * Refuse unsupported control messages, and 536 * translate fields as appropriate. 537 */ 538 switch (l_cmsg.cmsg_level) { 539 case LINUX_SOL_SOCKET: 540 /* It only differs on some archs */ 541 if (LINUX_SOL_SOCKET != SOL_SOCKET) 542 l_cmsg.cmsg_level = SOL_SOCKET; 543 544 switch(l_cmsg.cmsg_type) { 545 case LINUX_SCM_RIGHTS: 546 /* Linux SCM_RIGHTS is same as NetBSD */ 547 break; 548 549 case LINUX_SCM_CREDENTIALS: 550 /* no native equivalent, just drop it */ 551 m_free(ctl_mbuf); 552 ctl_mbuf = NULL; 553 msg.msg_control = NULL; 554 msg.msg_controllen = 0; 555 goto skipcmsg; 556 557 default: 558 /* other types not supported */ 559 error = EINVAL; 560 goto done; 561 } 562 break; 563 default: 564 /* pray and leave intact */ 565 break; 566 } 567 568 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 569 570 /* Check the buffer is big enough */ 571 if (__predict_false(cidx + cspace > clen)) { 572 u_int8_t *nc; 573 574 clen = cidx + cspace; 575 if (clen >= PAGE_SIZE) { 576 error = EINVAL; 577 goto done; 578 } 579 nc = realloc(clen <= MLEN ? NULL : control, 580 clen, M_TEMP, M_WAITOK); 581 if (!nc) { 582 error = ENOMEM; 583 goto done; 584 } 585 if (cidx <= MLEN) 586 /* Old buffer was in mbuf... */ 587 memcpy(nc, control, cidx); 588 control = nc; 589 } 590 591 /* Copy header */ 592 cmsg = (void *)&control[cidx]; 593 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 594 cmsg->cmsg_level = l_cmsg.cmsg_level; 595 cmsg->cmsg_type = l_cmsg.cmsg_type; 596 597 /* Zero area between header and data */ 598 memset(cmsg + 1, 0, 599 CMSG_ALIGN(sizeof(*cmsg)) - sizeof(*cmsg)); 600 601 /* Copyin the data */ 602 error = copyin(LINUX_CMSG_DATA(l_cc), 603 CMSG_DATA(cmsg), 604 l_cmsg.cmsg_len - sizeof(l_cmsg)); 605 if (error) 606 goto done; 607 608 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 609 cidx += cspace; 610 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 611 612 /* If we allocated a buffer, attach to mbuf */ 613 if (cidx > MLEN) { 614 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 615 ctl_mbuf->m_flags |= M_EXT_RW; 616 } 617 control = NULL; 618 ctl_mbuf->m_len = cidx; 619 620 msg.msg_control = ctl_mbuf; 621 msg.msg_flags |= MSG_CONTROLMBUF; 622 623 ktrkuser("mbcontrol", mtod(ctl_mbuf, void *), 624 msg.msg_controllen); 625 } 626 627 skipcmsg: 628 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 629 /* Freed internally */ 630 ctl_mbuf = NULL; 631 632 done: 633 if (ctl_mbuf != NULL) { 634 if (control != NULL && control != mtod(ctl_mbuf, void *)) 635 free(control, M_MBUF); 636 m_free(ctl_mbuf); 637 } 638 return (error); 639 } 640 641 int 642 linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval) 643 { 644 /* { 645 syscallarg(int) s; 646 syscallarg(void *) buf; 647 syscallarg(int) len; 648 syscallarg(int) flags; 649 syscallarg(struct osockaddr *) from; 650 syscallarg(int *) fromlenaddr; 651 } */ 652 int error; 653 struct sys_recvfrom_args bra; 654 655 SCARG(&bra, s) = SCARG(uap, s); 656 SCARG(&bra, buf) = SCARG(uap, buf); 657 SCARG(&bra, len) = SCARG(uap, len); 658 SCARG(&bra, flags) = SCARG(uap, flags); 659 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 660 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 661 662 if ((error = sys_recvfrom(l, &bra, retval))) 663 return (error); 664 665 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 666 return (error); 667 668 return (0); 669 } 670 671 static int 672 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 673 { 674 int dlen, error = 0; 675 struct cmsghdr *cmsg; 676 struct linux_cmsghdr linux_cmsg; 677 struct mbuf *m; 678 char *q, *q_end; 679 680 if (mp->msg_controllen <= 0 || control == 0) { 681 mp->msg_controllen = 0; 682 free_control_mbuf(l, control, control); 683 return 0; 684 } 685 686 ktrkuser("msgcontrol", mtod(control, void *), mp->msg_controllen); 687 688 q = (char *)mp->msg_control; 689 q_end = q + mp->msg_controllen; 690 691 for (m = control; m != NULL; ) { 692 cmsg = mtod(m, struct cmsghdr *); 693 694 /* 695 * Fixup cmsg. We handle two things: 696 * 0. different sizeof cmsg_len. 697 * 1. different values for level/type on some archs 698 * 2. different alignment of CMSG_DATA on some archs 699 */ 700 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 701 linux_cmsg.cmsg_level = cmsg->cmsg_level; 702 linux_cmsg.cmsg_type = cmsg->cmsg_type; 703 704 dlen = q_end - q; 705 if (linux_cmsg.cmsg_len > dlen) { 706 /* Not enough room for the parameter */ 707 dlen -= sizeof linux_cmsg; 708 if (dlen <= 0) 709 /* Discard if header wont fit */ 710 break; 711 mp->msg_flags |= MSG_CTRUNC; 712 if (linux_cmsg.cmsg_level == SOL_SOCKET 713 && linux_cmsg.cmsg_type == SCM_RIGHTS) 714 /* Do not truncate me ... */ 715 break; 716 } else 717 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 718 719 switch (linux_cmsg.cmsg_level) { 720 case SOL_SOCKET: 721 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 722 switch (linux_cmsg.cmsg_type) { 723 case SCM_RIGHTS: 724 /* Linux SCM_RIGHTS is same as NetBSD */ 725 break; 726 727 default: 728 /* other types not supported */ 729 error = EINVAL; 730 goto done; 731 } 732 /* machine dependent ! */ 733 break; 734 default: 735 /* pray and leave intact */ 736 break; 737 } 738 739 /* There can be padding between the header and data... */ 740 error = copyout(&linux_cmsg, q, sizeof linux_cmsg); 741 if (error != 0) { 742 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 743 dlen); 744 } 745 if (error != 0) { 746 /* We must free all the SCM_RIGHTS */ 747 m = control; 748 break; 749 } 750 m = m->m_next; 751 if (m == NULL || q + LINUX_CMSG_SPACE(dlen) > q_end) { 752 q += LINUX_CMSG_LEN(dlen); 753 break; 754 } 755 q += LINUX_CMSG_SPACE(dlen); 756 } 757 758 done: 759 free_control_mbuf(l, control, m); 760 761 mp->msg_controllen = q - (char *)mp->msg_control; 762 return error; 763 } 764 765 int 766 linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval) 767 { 768 /* { 769 syscallarg(int) s; 770 syscallarg(struct linux_msghdr *) msg; 771 syscallarg(u_int) flags; 772 } */ 773 struct msghdr msg; 774 struct linux_msghdr lmsg; 775 int error; 776 struct mbuf *from, *control; 777 778 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 779 if (error) 780 return (error); 781 linux_to_bsd_msghdr(&lmsg, &msg); 782 783 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 784 if (msg.msg_flags < 0) { 785 /* Some unsupported flag */ 786 return (EINVAL); 787 } 788 msg.msg_flags |= MSG_IOVUSRSPACE; 789 790 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 791 msg.msg_control != NULL ? &control : NULL, retval); 792 if (error != 0) 793 return error; 794 795 if (msg.msg_control != NULL) 796 error = linux_copyout_msg_control(l, &msg, control); 797 798 if (error == 0 && from != 0) { 799 mtod(from, struct osockaddr *)->sa_family = 800 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 801 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 802 from); 803 } else 804 msg.msg_namelen = 0; 805 806 if (from != NULL) 807 m_free(from); 808 809 if (error == 0) { 810 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 811 if (msg.msg_flags < 0) 812 /* Some flag unsupported by Linux */ 813 error = EINVAL; 814 else { 815 ktrkuser("msghdr", &msg, sizeof(msg)); 816 bsd_to_linux_msghdr(&msg, &lmsg); 817 error = copyout(&lmsg, SCARG(uap, msg), sizeof(lmsg)); 818 } 819 } 820 821 return (error); 822 } 823 824 /* 825 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 826 * is different, the rest matches IPPROTO_* on both systems. 827 */ 828 int 829 linux_to_bsd_sopt_level(int llevel) 830 { 831 832 switch (llevel) { 833 case LINUX_SOL_SOCKET: 834 return SOL_SOCKET; 835 case LINUX_SOL_IP: 836 return IPPROTO_IP; 837 #ifdef INET6 838 case LINUX_SOL_IPV6: 839 return IPPROTO_IPV6; 840 #endif 841 case LINUX_SOL_TCP: 842 return IPPROTO_TCP; 843 case LINUX_SOL_UDP: 844 return IPPROTO_UDP; 845 default: 846 return -1; 847 } 848 } 849 850 /* 851 * Convert Linux socket level socket option numbers to NetBSD values. 852 */ 853 int 854 linux_to_bsd_so_sockopt(int lopt) 855 { 856 857 switch (lopt) { 858 case LINUX_SO_DEBUG: 859 return SO_DEBUG; 860 case LINUX_SO_REUSEADDR: 861 /* 862 * Linux does not implement SO_REUSEPORT, but allows reuse of a 863 * host:port pair through SO_REUSEADDR even if the address is not a 864 * multicast-address. Effectively, this means that we should use 865 * SO_REUSEPORT to allow Linux applications to not exit with 866 * EADDRINUSE 867 */ 868 return SO_REUSEPORT; 869 case LINUX_SO_TYPE: 870 return SO_TYPE; 871 case LINUX_SO_ERROR: 872 return SO_ERROR; 873 case LINUX_SO_DONTROUTE: 874 return SO_DONTROUTE; 875 case LINUX_SO_BROADCAST: 876 return SO_BROADCAST; 877 case LINUX_SO_SNDBUF: 878 return SO_SNDBUF; 879 case LINUX_SO_RCVBUF: 880 return SO_RCVBUF; 881 case LINUX_SO_SNDLOWAT: 882 return SO_SNDLOWAT; 883 case LINUX_SO_RCVLOWAT: 884 return SO_RCVLOWAT; 885 case LINUX_SO_KEEPALIVE: 886 return SO_KEEPALIVE; 887 case LINUX_SO_OOBINLINE: 888 return SO_OOBINLINE; 889 case LINUX_SO_LINGER: 890 return SO_LINGER; 891 case LINUX_SO_ACCEPTCONN: 892 return SO_ACCEPTCONN; 893 case LINUX_SO_PRIORITY: 894 case LINUX_SO_NO_CHECK: 895 default: 896 return -1; 897 } 898 } 899 900 /* 901 * Convert Linux IP level socket option number to NetBSD values. 902 */ 903 int 904 linux_to_bsd_ip_sockopt(int lopt) 905 { 906 907 switch (lopt) { 908 case LINUX_IP_TOS: 909 return IP_TOS; 910 case LINUX_IP_TTL: 911 return IP_TTL; 912 case LINUX_IP_HDRINCL: 913 return IP_HDRINCL; 914 case LINUX_IP_MULTICAST_TTL: 915 return IP_MULTICAST_TTL; 916 case LINUX_IP_MULTICAST_LOOP: 917 return IP_MULTICAST_LOOP; 918 case LINUX_IP_MULTICAST_IF: 919 return IP_MULTICAST_IF; 920 case LINUX_IP_ADD_MEMBERSHIP: 921 return IP_ADD_MEMBERSHIP; 922 case LINUX_IP_DROP_MEMBERSHIP: 923 return IP_DROP_MEMBERSHIP; 924 default: 925 return -1; 926 } 927 } 928 929 /* 930 * Convert Linux IPV6 level socket option number to NetBSD values. 931 */ 932 #ifdef INET6 933 int 934 linux_to_bsd_ipv6_sockopt(int lopt) 935 { 936 937 switch (lopt) { 938 case LINUX_IPV6_V6ONLY: 939 return IPV6_V6ONLY; 940 default: 941 return -1; 942 } 943 } 944 #endif 945 946 /* 947 * Convert Linux TCP level socket option number to NetBSD values. 948 */ 949 int 950 linux_to_bsd_tcp_sockopt(int lopt) 951 { 952 953 switch (lopt) { 954 case LINUX_TCP_NODELAY: 955 return TCP_NODELAY; 956 case LINUX_TCP_MAXSEG: 957 return TCP_MAXSEG; 958 default: 959 return -1; 960 } 961 } 962 963 /* 964 * Convert Linux UDP level socket option number to NetBSD values. 965 */ 966 int 967 linux_to_bsd_udp_sockopt(int lopt) 968 { 969 970 switch (lopt) { 971 default: 972 return -1; 973 } 974 } 975 976 /* 977 * Another reasonably straightforward function: setsockopt(2). 978 * The level and option numbers are converted; the values passed 979 * are not (yet) converted, the ones currently implemented don't 980 * need conversion, as they are the same on both systems. 981 */ 982 int 983 linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval) 984 { 985 /* { 986 syscallarg(int) s; 987 syscallarg(int) level; 988 syscallarg(int) optname; 989 syscallarg(void *) optval; 990 syscallarg(int) optlen; 991 } */ 992 struct sys_setsockopt_args bsa; 993 int name; 994 995 SCARG(&bsa, s) = SCARG(uap, s); 996 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 997 SCARG(&bsa, val) = SCARG(uap, optval); 998 SCARG(&bsa, valsize) = SCARG(uap, optlen); 999 1000 /* 1001 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 1002 * and returns EOPNOTSUPP for other levels 1003 */ 1004 if (SCARG(&bsa, level) != SOL_SOCKET) { 1005 struct socket *so; 1006 int error, family; 1007 1008 /* fd_getsock() will use the descriptor for us */ 1009 if ((error = fd_getsock(SCARG(&bsa, s), &so)) != 0) 1010 return error; 1011 family = so->so_proto->pr_domain->dom_family; 1012 fd_putfile(SCARG(&bsa, s)); 1013 1014 if (family == AF_LOCAL) 1015 return EOPNOTSUPP; 1016 } 1017 1018 switch (SCARG(&bsa, level)) { 1019 case SOL_SOCKET: 1020 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1021 break; 1022 case IPPROTO_IP: 1023 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1024 break; 1025 #ifdef INET6 1026 case IPPROTO_IPV6: 1027 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1028 break; 1029 #endif 1030 case IPPROTO_TCP: 1031 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1032 break; 1033 case IPPROTO_UDP: 1034 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1035 break; 1036 default: 1037 return EINVAL; 1038 } 1039 1040 if (name == -1) 1041 return EINVAL; 1042 SCARG(&bsa, name) = name; 1043 1044 return sys_setsockopt(l, &bsa, retval); 1045 } 1046 1047 /* 1048 * getsockopt(2) is very much the same as setsockopt(2) (see above) 1049 */ 1050 int 1051 linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval) 1052 { 1053 /* { 1054 syscallarg(int) s; 1055 syscallarg(int) level; 1056 syscallarg(int) optname; 1057 syscallarg(void *) optval; 1058 syscallarg(int *) optlen; 1059 } */ 1060 struct sys_getsockopt_args bga; 1061 int name; 1062 1063 SCARG(&bga, s) = SCARG(uap, s); 1064 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 1065 SCARG(&bga, val) = SCARG(uap, optval); 1066 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 1067 1068 switch (SCARG(&bga, level)) { 1069 case SOL_SOCKET: 1070 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1071 break; 1072 case IPPROTO_IP: 1073 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1074 break; 1075 #ifdef INET6 1076 case IPPROTO_IPV6: 1077 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1078 break; 1079 #endif 1080 case IPPROTO_TCP: 1081 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1082 break; 1083 case IPPROTO_UDP: 1084 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1085 break; 1086 default: 1087 return EINVAL; 1088 } 1089 1090 if (name == -1) 1091 return EINVAL; 1092 SCARG(&bga, name) = name; 1093 1094 return sys_getsockopt(l, &bga, retval); 1095 } 1096 1097 int 1098 linux_getifname(struct lwp *l, register_t *retval, void *data) 1099 { 1100 struct ifnet *ifp; 1101 struct linux_ifreq ifr; 1102 int error; 1103 1104 error = copyin(data, &ifr, sizeof(ifr)); 1105 if (error) 1106 return error; 1107 1108 ifp = if_byindex(ifr.ifr_ifru.ifru_ifindex); 1109 if (ifp == NULL) 1110 return ENODEV; 1111 1112 strncpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 1113 1114 return copyout(&ifr, data, sizeof(ifr)); 1115 } 1116 1117 int 1118 linux_getifconf(struct lwp *l, register_t *retval, void *data) 1119 { 1120 struct linux_ifreq ifr, *ifrp; 1121 struct linux_ifconf ifc; 1122 struct ifnet *ifp; 1123 struct ifaddr *ifa; 1124 struct sockaddr *sa; 1125 struct osockaddr *osa; 1126 int space, error = 0; 1127 const int sz = (int)sizeof(ifr); 1128 1129 error = copyin(data, &ifc, sizeof(ifc)); 1130 if (error) 1131 return error; 1132 1133 ifrp = ifc.ifc_req; 1134 if (ifrp == NULL) 1135 space = 0; 1136 else 1137 space = ifc.ifc_len; 1138 1139 IFNET_FOREACH(ifp) { 1140 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1141 sizeof(ifr.ifr_name)); 1142 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1143 return ENAMETOOLONG; 1144 if (IFADDR_EMPTY(ifp)) 1145 continue; 1146 IFADDR_FOREACH(ifa, ifp) { 1147 sa = ifa->ifa_addr; 1148 if (sa->sa_family != AF_INET || 1149 sa->sa_len > sizeof(*osa)) 1150 continue; 1151 memcpy(&ifr.ifr_addr, sa, sa->sa_len); 1152 osa = (struct osockaddr *)&ifr.ifr_addr; 1153 osa->sa_family = sa->sa_family; 1154 if (space >= sz) { 1155 error = copyout(&ifr, ifrp, sz); 1156 if (error != 0) 1157 return error; 1158 ifrp++; 1159 } 1160 space -= sz; 1161 } 1162 } 1163 1164 if (ifrp != NULL) 1165 ifc.ifc_len -= space; 1166 else 1167 ifc.ifc_len = -space; 1168 1169 return copyout(&ifc, data, sizeof(ifc)); 1170 } 1171 1172 int 1173 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 1174 void *data) 1175 { 1176 /* Not the full structure, just enough to map what we do here */ 1177 struct linux_ifreq lreq; 1178 file_t *fp; 1179 struct ifaddr *ifa; 1180 struct ifnet *ifp; 1181 struct sockaddr_dl *sadl; 1182 int error, found; 1183 int index, ifnum; 1184 1185 /* 1186 * We can't emulate this ioctl by calling sys_ioctl() to run 1187 * SIOCGIFCONF, because the user buffer is not of the right 1188 * type to take those results. We can't use kernel buffers to 1189 * receive the results, as the implementation of sys_ioctl() 1190 * and ifconf() [which implements SIOCGIFCONF] use 1191 * copyin()/copyout() which will fail on kernel addresses. 1192 * 1193 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1194 */ 1195 1196 if ((fp = fd_getfile(fd)) == NULL) 1197 return (EBADF); 1198 1199 KERNEL_LOCK(1, NULL); 1200 1201 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1202 error = EBADF; 1203 goto out; 1204 } 1205 1206 error = copyin(data, &lreq, sizeof(lreq)); 1207 if (error) 1208 goto out; 1209 lreq.ifr_name[LINUX_IFNAMSIZ-1] = '\0'; /* just in case */ 1210 1211 /* 1212 * Try real interface name first, then fake "ethX" 1213 */ 1214 found = 0; 1215 IFNET_FOREACH(ifp) { 1216 if (found) 1217 break; 1218 if (strcmp(lreq.ifr_name, ifp->if_xname)) 1219 /* not this interface */ 1220 continue; 1221 found=1; 1222 if (IFADDR_EMPTY(ifp)) { 1223 error = ENODEV; 1224 goto out; 1225 } 1226 IFADDR_FOREACH(ifa, ifp) { 1227 sadl = satosdl(ifa->ifa_addr); 1228 /* only return ethernet addresses */ 1229 /* XXX what about FDDI, etc. ? */ 1230 if (sadl->sdl_family != AF_LINK || 1231 sadl->sdl_type != IFT_ETHER) 1232 continue; 1233 memcpy(&lreq.ifr_hwaddr.sa_data, CLLADDR(sadl), 1234 MIN(sadl->sdl_alen, 1235 sizeof(lreq.ifr_hwaddr.sa_data))); 1236 lreq.ifr_hwaddr.sa_family = 1237 sadl->sdl_family; 1238 error = copyout(&lreq, data, sizeof(lreq)); 1239 goto out; 1240 } 1241 } 1242 1243 if (strncmp(lreq.ifr_name, "eth", 3) == 0) { 1244 for (ifnum = 0, index = 3; 1245 index < LINUX_IFNAMSIZ && lreq.ifr_name[index] != '\0'; 1246 index++) { 1247 ifnum *= 10; 1248 ifnum += lreq.ifr_name[index] - '0'; 1249 } 1250 1251 error = EINVAL; /* in case we don't find one */ 1252 found = 0; 1253 IFNET_FOREACH(ifp) { 1254 if (found) 1255 break; 1256 memcpy(lreq.ifr_name, ifp->if_xname, 1257 MIN(LINUX_IFNAMSIZ, IFNAMSIZ)); 1258 IFADDR_FOREACH(ifa, ifp) { 1259 sadl = satosdl(ifa->ifa_addr); 1260 /* only return ethernet addresses */ 1261 /* XXX what about FDDI, etc. ? */ 1262 if (sadl->sdl_family != AF_LINK || 1263 sadl->sdl_type != IFT_ETHER) 1264 continue; 1265 if (ifnum--) 1266 /* not the reqested iface */ 1267 continue; 1268 memcpy(&lreq.ifr_hwaddr.sa_data, 1269 CLLADDR(sadl), 1270 MIN(sadl->sdl_alen, 1271 sizeof(lreq.ifr_hwaddr.sa_data))); 1272 lreq.ifr_hwaddr.sa_family = 1273 sadl->sdl_family; 1274 error = copyout(&lreq, data, sizeof(lreq)); 1275 found = 1; 1276 break; 1277 } 1278 } 1279 } else { 1280 /* unknown interface, not even an "eth*" name */ 1281 error = ENODEV; 1282 } 1283 1284 out: 1285 KERNEL_UNLOCK_ONE(NULL); 1286 fd_putfile(fd); 1287 return error; 1288 } 1289 1290 int 1291 linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) 1292 { 1293 /* { 1294 syscallarg(int) fd; 1295 syscallarg(u_long) com; 1296 syscallarg(void *) data; 1297 } */ 1298 u_long com; 1299 int error = 0, isdev = 0, dosys = 1; 1300 struct sys_ioctl_args ia; 1301 file_t *fp; 1302 struct vnode *vp; 1303 int (*ioctlf)(file_t *, u_long, void *); 1304 struct ioctl_pt pt; 1305 1306 if ((fp = fd_getfile(SCARG(uap, fd))) == NULL) 1307 return (EBADF); 1308 1309 if (fp->f_type == DTYPE_VNODE) { 1310 vp = (struct vnode *)fp->f_data; 1311 isdev = vp->v_type == VCHR; 1312 } 1313 1314 /* 1315 * Don't try to interpret socket ioctl calls that are done 1316 * on a device filedescriptor, just pass them through, to 1317 * emulate Linux behaviour. Use PTIOCLINUX so that the 1318 * device will only handle these if it's prepared to do 1319 * so, to avoid unexpected things from happening. 1320 */ 1321 if (isdev) { 1322 dosys = 0; 1323 ioctlf = fp->f_ops->fo_ioctl; 1324 pt.com = SCARG(uap, com); 1325 pt.data = SCARG(uap, data); 1326 error = ioctlf(fp, PTIOCLINUX, &pt); 1327 /* 1328 * XXX hack: if the function returns EJUSTRETURN, 1329 * it has stuffed a sysctl return value in pt.data. 1330 */ 1331 if (error == EJUSTRETURN) { 1332 retval[0] = (register_t)pt.data; 1333 error = 0; 1334 } 1335 goto out; 1336 } 1337 1338 com = SCARG(uap, com); 1339 retval[0] = 0; 1340 1341 switch (com) { 1342 case LINUX_SIOCGIFNAME: 1343 error = linux_getifname(l, retval, SCARG(uap, data)); 1344 dosys = 0; 1345 break; 1346 case LINUX_SIOCGIFCONF: 1347 error = linux_getifconf(l, retval, SCARG(uap, data)); 1348 dosys = 0; 1349 break; 1350 case LINUX_SIOCGIFFLAGS: 1351 SCARG(&ia, com) = OSIOCGIFFLAGS; 1352 break; 1353 case LINUX_SIOCSIFFLAGS: 1354 SCARG(&ia, com) = OSIOCSIFFLAGS; 1355 break; 1356 case LINUX_SIOCGIFADDR: 1357 SCARG(&ia, com) = OOSIOCGIFADDR; 1358 break; 1359 case LINUX_SIOCGIFDSTADDR: 1360 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1361 break; 1362 case LINUX_SIOCGIFBRDADDR: 1363 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1364 break; 1365 case LINUX_SIOCGIFNETMASK: 1366 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1367 break; 1368 case LINUX_SIOCGIFMTU: 1369 SCARG(&ia, com) = OSIOCGIFMTU; 1370 break; 1371 case LINUX_SIOCADDMULTI: 1372 SCARG(&ia, com) = OSIOCADDMULTI; 1373 break; 1374 case LINUX_SIOCDELMULTI: 1375 SCARG(&ia, com) = OSIOCDELMULTI; 1376 break; 1377 case LINUX_SIOCGIFHWADDR: 1378 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1379 SCARG(uap, data)); 1380 dosys = 0; 1381 break; 1382 default: 1383 error = EINVAL; 1384 } 1385 1386 out: 1387 fd_putfile(SCARG(uap, fd)); 1388 1389 if (error ==0 && dosys) { 1390 SCARG(&ia, fd) = SCARG(uap, fd); 1391 SCARG(&ia, data) = SCARG(uap, data); 1392 error = sys_ioctl(curlwp, &ia, retval); 1393 } 1394 1395 return error; 1396 } 1397 1398 int 1399 linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval) 1400 { 1401 /* { 1402 syscallarg(int) s; 1403 syscallarg(const struct sockaddr *) name; 1404 syscallarg(int) namelen; 1405 } */ 1406 int error; 1407 struct mbuf *nam; 1408 1409 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1410 SCARG(uap, namelen)); 1411 if (error) 1412 return (error); 1413 1414 error = do_sys_connect(l, SCARG(uap, s), nam); 1415 1416 if (error == EISCONN) { 1417 struct socket *so; 1418 int state, prflags; 1419 1420 /* fd_getsock() will use the descriptor for us */ 1421 if (fd_getsock(SCARG(uap, s), &so) != 0) 1422 return EISCONN; 1423 1424 solock(so); 1425 state = so->so_state; 1426 prflags = so->so_proto->pr_flags; 1427 sounlock(so); 1428 fd_putfile(SCARG(uap, s)); 1429 /* 1430 * We should only let this call succeed once per 1431 * non-blocking connect; however we don't have 1432 * a convenient place to keep that state.. 1433 */ 1434 if ((state & (SS_ISCONNECTED|SS_NBIO)) == 1435 (SS_ISCONNECTED|SS_NBIO) && 1436 (prflags & PR_CONNREQUIRED)) 1437 return 0; 1438 } 1439 1440 return (error); 1441 } 1442 1443 int 1444 linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval) 1445 { 1446 /* { 1447 syscallarg(int) s; 1448 syscallarg(const struct osockaddr *) name; 1449 syscallarg(int) namelen; 1450 } */ 1451 int error; 1452 struct mbuf *nam; 1453 1454 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1455 SCARG(uap, namelen)); 1456 if (error) 1457 return (error); 1458 1459 return do_sys_bind(l, SCARG(uap, s), nam); 1460 } 1461 1462 int 1463 linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval) 1464 { 1465 /* { 1466 syscallarg(int) fdes; 1467 syscallarg(void *) asa; 1468 syscallarg(int *) alen; 1469 } */ 1470 int error; 1471 1472 if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0) 1473 return (error); 1474 1475 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1476 return (error); 1477 1478 return (0); 1479 } 1480 1481 int 1482 linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval) 1483 { 1484 /* { 1485 syscallarg(int) fdes; 1486 syscallarg(void *) asa; 1487 syscallarg(int *) alen; 1488 } */ 1489 int error; 1490 1491 if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0) 1492 return (error); 1493 1494 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1495 return (error); 1496 1497 return (0); 1498 } 1499 1500 /* 1501 * Copy the osockaddr structure pointed to by osa to mbuf, adjust 1502 * family and convert to sockaddr. 1503 */ 1504 static int 1505 linux_get_sa(struct lwp *l, int s, struct mbuf **mp, 1506 const struct osockaddr *osa, unsigned int salen) 1507 { 1508 int error, bdom; 1509 struct sockaddr *sa; 1510 struct osockaddr *kosa; 1511 struct mbuf *m; 1512 1513 if (salen == 1 || salen > UCHAR_MAX) { 1514 DPRINTF(("bad osa=%p salen=%d\n", osa, salen)); 1515 return EINVAL; 1516 } 1517 1518 /* We'll need the address in an mbuf later, so copy into one here */ 1519 m = m_get(M_WAIT, MT_SONAME); 1520 if (salen > MLEN) 1521 MEXTMALLOC(m, salen, M_WAITOK); 1522 1523 m->m_len = salen; 1524 1525 if (salen == 0) { 1526 *mp = m; 1527 return 0; 1528 } 1529 1530 kosa = mtod(m, void *); 1531 if ((error = copyin(osa, kosa, salen))) { 1532 DPRINTF(("error %d copying osa %p len %d\n", 1533 error, osa, salen)); 1534 goto bad; 1535 } 1536 1537 ktrkuser("linux/sockaddr", kosa, salen); 1538 1539 bdom = linux_to_bsd_domain(kosa->sa_family); 1540 if (bdom == -1) { 1541 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1542 error = EINVAL; 1543 goto bad; 1544 } 1545 1546 /* 1547 * If the family is unspecified, use address family of the socket. 1548 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1549 */ 1550 if (bdom == AF_UNSPEC) { 1551 struct socket *so; 1552 1553 /* fd_getsock() will use the descriptor for us */ 1554 if ((error = fd_getsock(s, &so)) != 0) 1555 goto bad; 1556 1557 bdom = so->so_proto->pr_domain->dom_family; 1558 fd_putfile(s); 1559 1560 DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom)); 1561 } 1562 1563 /* 1564 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1565 * which lacks the scope id compared with RFC2553 one. If we detect 1566 * the situation, reject the address and write a message to system log. 1567 * 1568 * Still accept addresses for which the scope id is not used. 1569 */ 1570 if (bdom == AF_INET6 && salen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1571 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)kosa; 1572 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1573 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1574 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1575 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1576 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1577 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1578 struct proc *p = l->l_proc; 1579 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1580 1581 log(LOG_DEBUG, 1582 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1583 "sockaddr_in6 rejected", 1584 p->p_pid, p->p_comm, uid); 1585 error = EINVAL; 1586 goto bad; 1587 } 1588 salen = sizeof (struct sockaddr_in6); 1589 sin6->sin6_scope_id = 0; 1590 } 1591 1592 if (bdom == AF_INET) 1593 salen = sizeof(struct sockaddr_in); 1594 1595 sa = (struct sockaddr *) kosa; 1596 sa->sa_family = bdom; 1597 sa->sa_len = salen; 1598 m->m_len = salen; 1599 ktrkuser("mbsoname", kosa, salen); 1600 1601 #ifdef DEBUG_LINUX 1602 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1603 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1604 DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom])); 1605 DPRINTF(("\n")); 1606 #endif 1607 1608 *mp = m; 1609 return 0; 1610 1611 bad: 1612 m_free(m); 1613 return error; 1614 } 1615 1616 static int 1617 linux_sa_put(struct osockaddr *osa) 1618 { 1619 struct sockaddr sa; 1620 struct osockaddr *kosa; 1621 int error, bdom, len; 1622 1623 /* 1624 * Only read/write the sockaddr family and length part, the rest is 1625 * not changed. 1626 */ 1627 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1628 1629 error = copyin(osa, &sa, len); 1630 if (error) 1631 return (error); 1632 1633 bdom = bsd_to_linux_domain(sa.sa_family); 1634 if (bdom == -1) 1635 return (EINVAL); 1636 1637 /* Note: we convert from sockaddr to osockaddr here, too */ 1638 kosa = (struct osockaddr *) &sa; 1639 kosa->sa_family = bdom; 1640 error = copyout(kosa, osa, len); 1641 if (error) 1642 return (error); 1643 1644 return (0); 1645 } 1646 1647 #ifndef __amd64__ 1648 int 1649 linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval) 1650 { 1651 /* { 1652 syscallarg(int) s; 1653 syscallarg(void *) buf; 1654 syscallarg(int) len; 1655 syscallarg(int) flags; 1656 } */ 1657 struct sys_recvfrom_args bra; 1658 1659 1660 SCARG(&bra, s) = SCARG(uap, s); 1661 SCARG(&bra, buf) = SCARG(uap, buf); 1662 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1663 SCARG(&bra, flags) = SCARG(uap, flags); 1664 SCARG(&bra, from) = NULL; 1665 SCARG(&bra, fromlenaddr) = NULL; 1666 1667 return (sys_recvfrom(l, &bra, retval)); 1668 } 1669 1670 int 1671 linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval) 1672 { 1673 /* { 1674 syscallarg(int) s; 1675 syscallarg(void *) buf; 1676 syscallarg(int) len; 1677 syscallarg(int) flags; 1678 } */ 1679 struct sys_sendto_args bsa; 1680 1681 SCARG(&bsa, s) = SCARG(uap, s); 1682 SCARG(&bsa, buf) = SCARG(uap, buf); 1683 SCARG(&bsa, len) = SCARG(uap, len); 1684 SCARG(&bsa, flags) = SCARG(uap, flags); 1685 SCARG(&bsa, to) = NULL; 1686 SCARG(&bsa, tolen) = 0; 1687 1688 return (sys_sendto(l, &bsa, retval)); 1689 } 1690 #endif 1691 1692 int 1693 linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval) 1694 { 1695 /* { 1696 syscallarg(int) s; 1697 syscallarg(struct osockaddr *) name; 1698 syscallarg(int *) anamelen; 1699 } */ 1700 int error; 1701 struct sys_accept_args baa; 1702 1703 SCARG(&baa, s) = SCARG(uap, s); 1704 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1705 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1706 1707 if ((error = sys_accept(l, &baa, retval))) 1708 return (error); 1709 1710 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1711 return (error); 1712 1713 return (0); 1714 } 1715