1 /* $NetBSD: linux_socket.c,v 1.122 2014/11/26 09:53:53 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 1.122 2014/11/26 09:53:53 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 mbuf **, 123 const struct osockaddr *, unsigned int); 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 mbuf *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_flags |= MSG_NAMEMBUF; 423 msg.msg_name = nam; 424 msg.msg_namelen = SCARG(uap, tolen); 425 } 426 427 msg.msg_iov = &aiov; 428 msg.msg_iovlen = 1; 429 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 430 aiov.iov_len = SCARG(uap, len); 431 432 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 433 } 434 435 static void 436 linux_to_bsd_msghdr(struct linux_msghdr *lmsg, struct msghdr *bmsg) 437 { 438 bmsg->msg_name = lmsg->msg_name; 439 bmsg->msg_namelen = lmsg->msg_namelen; 440 bmsg->msg_iov = lmsg->msg_iov; 441 bmsg->msg_iovlen = lmsg->msg_iovlen; 442 bmsg->msg_control = lmsg->msg_control; 443 bmsg->msg_controllen = lmsg->msg_controllen; 444 bmsg->msg_flags = lmsg->msg_flags; 445 } 446 447 static void 448 bsd_to_linux_msghdr(struct msghdr *bmsg, struct linux_msghdr *lmsg) 449 { 450 lmsg->msg_name = bmsg->msg_name; 451 lmsg->msg_namelen = bmsg->msg_namelen; 452 lmsg->msg_iov = bmsg->msg_iov; 453 lmsg->msg_iovlen = bmsg->msg_iovlen; 454 lmsg->msg_control = bmsg->msg_control; 455 lmsg->msg_controllen = bmsg->msg_controllen; 456 lmsg->msg_flags = bmsg->msg_flags; 457 } 458 459 int 460 linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval) 461 { 462 /* { 463 syscallarg(int) s; 464 syscallarg(struct linux_msghdr *) msg; 465 syscallarg(u_int) flags; 466 } */ 467 struct msghdr msg; 468 struct linux_msghdr lmsg; 469 int error; 470 int bflags; 471 struct mbuf *nam; 472 u_int8_t *control; 473 struct mbuf *ctl_mbuf = NULL; 474 475 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 476 if (error) 477 return error; 478 linux_to_bsd_msghdr(&lmsg, &msg); 479 480 msg.msg_flags = MSG_IOVUSRSPACE; 481 482 /* 483 * Translate message flags. 484 */ 485 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 486 if (bflags < 0) 487 /* Some supported flag */ 488 return EINVAL; 489 490 if (lmsg.msg_name) { 491 /* Read in and convert the sockaddr */ 492 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 493 msg.msg_namelen); 494 if (error) 495 return (error); 496 msg.msg_flags |= MSG_NAMEMBUF; 497 msg.msg_name = nam; 498 } 499 500 /* 501 * Handle cmsg if there is any. 502 */ 503 if (LINUX_CMSG_FIRSTHDR(&lmsg)) { 504 struct linux_cmsghdr l_cmsg, *l_cc; 505 struct cmsghdr *cmsg; 506 ssize_t resid = msg.msg_controllen; 507 size_t clen, cidx = 0, cspace; 508 509 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 510 clen = MLEN; 511 control = mtod(ctl_mbuf, void *); 512 513 l_cc = LINUX_CMSG_FIRSTHDR(&lmsg); 514 do { 515 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 516 if (error) 517 goto done; 518 519 /* 520 * Sanity check the control message length. 521 */ 522 if (l_cmsg.cmsg_len > resid 523 || l_cmsg.cmsg_len < sizeof l_cmsg) { 524 error = EINVAL; 525 goto done; 526 } 527 528 /* 529 * Refuse unsupported control messages, and 530 * translate fields as appropriate. 531 */ 532 switch (l_cmsg.cmsg_level) { 533 case LINUX_SOL_SOCKET: 534 /* It only differs on some archs */ 535 if (LINUX_SOL_SOCKET != SOL_SOCKET) 536 l_cmsg.cmsg_level = SOL_SOCKET; 537 538 switch(l_cmsg.cmsg_type) { 539 case LINUX_SCM_RIGHTS: 540 /* Linux SCM_RIGHTS is same as NetBSD */ 541 break; 542 543 case LINUX_SCM_CREDENTIALS: 544 /* no native equivalent, just drop it */ 545 m_free(ctl_mbuf); 546 ctl_mbuf = NULL; 547 msg.msg_control = NULL; 548 msg.msg_controllen = 0; 549 goto skipcmsg; 550 551 default: 552 /* other types not supported */ 553 error = EINVAL; 554 goto done; 555 } 556 break; 557 default: 558 /* pray and leave intact */ 559 break; 560 } 561 562 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 563 564 /* Check the buffer is big enough */ 565 if (__predict_false(cidx + cspace > clen)) { 566 u_int8_t *nc; 567 568 clen = cidx + cspace; 569 if (clen >= PAGE_SIZE) { 570 error = EINVAL; 571 goto done; 572 } 573 nc = realloc(clen <= MLEN ? NULL : control, 574 clen, M_TEMP, M_WAITOK); 575 if (!nc) { 576 error = ENOMEM; 577 goto done; 578 } 579 if (cidx <= MLEN) 580 /* Old buffer was in mbuf... */ 581 memcpy(nc, control, cidx); 582 control = nc; 583 } 584 585 /* Copy header */ 586 cmsg = (void *)&control[cidx]; 587 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 588 cmsg->cmsg_level = l_cmsg.cmsg_level; 589 cmsg->cmsg_type = l_cmsg.cmsg_type; 590 591 /* Zero area between header and data */ 592 memset(cmsg + 1, 0, 593 CMSG_ALIGN(sizeof(*cmsg)) - sizeof(*cmsg)); 594 595 /* Copyin the data */ 596 error = copyin(LINUX_CMSG_DATA(l_cc), 597 CMSG_DATA(cmsg), 598 l_cmsg.cmsg_len - sizeof(l_cmsg)); 599 if (error) 600 goto done; 601 602 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 603 cidx += cspace; 604 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 605 606 /* If we allocated a buffer, attach to mbuf */ 607 if (cidx > MLEN) { 608 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 609 ctl_mbuf->m_flags |= M_EXT_RW; 610 } 611 control = NULL; 612 ctl_mbuf->m_len = cidx; 613 614 msg.msg_control = ctl_mbuf; 615 msg.msg_flags |= MSG_CONTROLMBUF; 616 617 ktrkuser("mbcontrol", mtod(ctl_mbuf, void *), 618 msg.msg_controllen); 619 } 620 621 skipcmsg: 622 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 623 /* Freed internally */ 624 ctl_mbuf = NULL; 625 626 done: 627 if (ctl_mbuf != NULL) { 628 if (control != NULL && control != mtod(ctl_mbuf, void *)) 629 free(control, M_MBUF); 630 m_free(ctl_mbuf); 631 } 632 return (error); 633 } 634 635 int 636 linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval) 637 { 638 /* { 639 syscallarg(int) s; 640 syscallarg(void *) buf; 641 syscallarg(int) len; 642 syscallarg(int) flags; 643 syscallarg(struct osockaddr *) from; 644 syscallarg(int *) fromlenaddr; 645 } */ 646 int error; 647 struct sys_recvfrom_args bra; 648 649 SCARG(&bra, s) = SCARG(uap, s); 650 SCARG(&bra, buf) = SCARG(uap, buf); 651 SCARG(&bra, len) = SCARG(uap, len); 652 SCARG(&bra, flags) = SCARG(uap, flags); 653 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 654 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 655 656 if ((error = sys_recvfrom(l, &bra, retval))) 657 return (error); 658 659 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 660 return (error); 661 662 return (0); 663 } 664 665 static int 666 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 667 { 668 int dlen, error = 0; 669 struct cmsghdr *cmsg; 670 struct linux_cmsghdr linux_cmsg; 671 struct mbuf *m; 672 char *q, *q_end; 673 674 if (mp->msg_controllen <= 0 || control == 0) { 675 mp->msg_controllen = 0; 676 free_control_mbuf(l, control, control); 677 return 0; 678 } 679 680 ktrkuser("msgcontrol", mtod(control, void *), mp->msg_controllen); 681 682 q = (char *)mp->msg_control; 683 q_end = q + mp->msg_controllen; 684 685 for (m = control; m != NULL; ) { 686 cmsg = mtod(m, struct cmsghdr *); 687 688 /* 689 * Fixup cmsg. We handle two things: 690 * 0. different sizeof cmsg_len. 691 * 1. different values for level/type on some archs 692 * 2. different alignment of CMSG_DATA on some archs 693 */ 694 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 695 linux_cmsg.cmsg_level = cmsg->cmsg_level; 696 linux_cmsg.cmsg_type = cmsg->cmsg_type; 697 698 dlen = q_end - q; 699 if (linux_cmsg.cmsg_len > dlen) { 700 /* Not enough room for the parameter */ 701 dlen -= sizeof linux_cmsg; 702 if (dlen <= 0) 703 /* Discard if header wont fit */ 704 break; 705 mp->msg_flags |= MSG_CTRUNC; 706 if (linux_cmsg.cmsg_level == SOL_SOCKET 707 && linux_cmsg.cmsg_type == SCM_RIGHTS) 708 /* Do not truncate me ... */ 709 break; 710 } else 711 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 712 713 switch (linux_cmsg.cmsg_level) { 714 case SOL_SOCKET: 715 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 716 switch (linux_cmsg.cmsg_type) { 717 case SCM_RIGHTS: 718 /* Linux SCM_RIGHTS is same as NetBSD */ 719 break; 720 721 default: 722 /* other types not supported */ 723 error = EINVAL; 724 goto done; 725 } 726 /* machine dependent ! */ 727 break; 728 default: 729 /* pray and leave intact */ 730 break; 731 } 732 733 /* There can be padding between the header and data... */ 734 error = copyout(&linux_cmsg, q, sizeof linux_cmsg); 735 if (error != 0) { 736 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 737 dlen); 738 } 739 if (error != 0) { 740 /* We must free all the SCM_RIGHTS */ 741 m = control; 742 break; 743 } 744 m = m->m_next; 745 if (m == NULL || q + LINUX_CMSG_SPACE(dlen) > q_end) { 746 q += LINUX_CMSG_LEN(dlen); 747 break; 748 } 749 q += LINUX_CMSG_SPACE(dlen); 750 } 751 752 done: 753 free_control_mbuf(l, control, m); 754 755 mp->msg_controllen = q - (char *)mp->msg_control; 756 return error; 757 } 758 759 int 760 linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval) 761 { 762 /* { 763 syscallarg(int) s; 764 syscallarg(struct linux_msghdr *) msg; 765 syscallarg(u_int) flags; 766 } */ 767 struct msghdr msg; 768 struct linux_msghdr lmsg; 769 int error; 770 struct mbuf *from, *control; 771 772 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 773 if (error) 774 return (error); 775 linux_to_bsd_msghdr(&lmsg, &msg); 776 777 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 778 if (msg.msg_flags < 0) { 779 /* Some unsupported flag */ 780 return (EINVAL); 781 } 782 msg.msg_flags |= MSG_IOVUSRSPACE; 783 784 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 785 msg.msg_control != NULL ? &control : NULL, retval); 786 if (error != 0) 787 return error; 788 789 if (msg.msg_control != NULL) 790 error = linux_copyout_msg_control(l, &msg, control); 791 792 if (error == 0 && from != 0) { 793 mtod(from, struct osockaddr *)->sa_family = 794 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 795 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 796 from); 797 } else 798 msg.msg_namelen = 0; 799 800 if (from != NULL) 801 m_free(from); 802 803 if (error == 0) { 804 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 805 if (msg.msg_flags < 0) 806 /* Some flag unsupported by Linux */ 807 error = EINVAL; 808 else { 809 ktrkuser("msghdr", &msg, sizeof(msg)); 810 bsd_to_linux_msghdr(&msg, &lmsg); 811 error = copyout(&lmsg, SCARG(uap, msg), sizeof(lmsg)); 812 } 813 } 814 815 return (error); 816 } 817 818 /* 819 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 820 * is different, the rest matches IPPROTO_* on both systems. 821 */ 822 int 823 linux_to_bsd_sopt_level(int llevel) 824 { 825 826 switch (llevel) { 827 case LINUX_SOL_SOCKET: 828 return SOL_SOCKET; 829 case LINUX_SOL_IP: 830 return IPPROTO_IP; 831 #ifdef INET6 832 case LINUX_SOL_IPV6: 833 return IPPROTO_IPV6; 834 #endif 835 case LINUX_SOL_TCP: 836 return IPPROTO_TCP; 837 case LINUX_SOL_UDP: 838 return IPPROTO_UDP; 839 default: 840 return -1; 841 } 842 } 843 844 /* 845 * Convert Linux socket level socket option numbers to NetBSD values. 846 */ 847 int 848 linux_to_bsd_so_sockopt(int lopt) 849 { 850 851 switch (lopt) { 852 case LINUX_SO_DEBUG: 853 return SO_DEBUG; 854 case LINUX_SO_REUSEADDR: 855 /* 856 * Linux does not implement SO_REUSEPORT, but allows reuse of a 857 * host:port pair through SO_REUSEADDR even if the address is not a 858 * multicast-address. Effectively, this means that we should use 859 * SO_REUSEPORT to allow Linux applications to not exit with 860 * EADDRINUSE 861 */ 862 return SO_REUSEPORT; 863 case LINUX_SO_TYPE: 864 return SO_TYPE; 865 case LINUX_SO_ERROR: 866 return SO_ERROR; 867 case LINUX_SO_DONTROUTE: 868 return SO_DONTROUTE; 869 case LINUX_SO_BROADCAST: 870 return SO_BROADCAST; 871 case LINUX_SO_SNDBUF: 872 return SO_SNDBUF; 873 case LINUX_SO_RCVBUF: 874 return SO_RCVBUF; 875 case LINUX_SO_SNDLOWAT: 876 return SO_SNDLOWAT; 877 case LINUX_SO_RCVLOWAT: 878 return SO_RCVLOWAT; 879 case LINUX_SO_KEEPALIVE: 880 return SO_KEEPALIVE; 881 case LINUX_SO_OOBINLINE: 882 return SO_OOBINLINE; 883 case LINUX_SO_LINGER: 884 return SO_LINGER; 885 case LINUX_SO_ACCEPTCONN: 886 return SO_ACCEPTCONN; 887 case LINUX_SO_PRIORITY: 888 case LINUX_SO_NO_CHECK: 889 default: 890 return -1; 891 } 892 } 893 894 /* 895 * Convert Linux IP level socket option number to NetBSD values. 896 */ 897 int 898 linux_to_bsd_ip_sockopt(int lopt) 899 { 900 901 switch (lopt) { 902 case LINUX_IP_TOS: 903 return IP_TOS; 904 case LINUX_IP_TTL: 905 return IP_TTL; 906 case LINUX_IP_HDRINCL: 907 return IP_HDRINCL; 908 case LINUX_IP_MULTICAST_TTL: 909 return IP_MULTICAST_TTL; 910 case LINUX_IP_MULTICAST_LOOP: 911 return IP_MULTICAST_LOOP; 912 case LINUX_IP_MULTICAST_IF: 913 return IP_MULTICAST_IF; 914 case LINUX_IP_ADD_MEMBERSHIP: 915 return IP_ADD_MEMBERSHIP; 916 case LINUX_IP_DROP_MEMBERSHIP: 917 return IP_DROP_MEMBERSHIP; 918 default: 919 return -1; 920 } 921 } 922 923 /* 924 * Convert Linux IPV6 level socket option number to NetBSD values. 925 */ 926 #ifdef INET6 927 int 928 linux_to_bsd_ipv6_sockopt(int lopt) 929 { 930 931 switch (lopt) { 932 case LINUX_IPV6_V6ONLY: 933 return IPV6_V6ONLY; 934 default: 935 return -1; 936 } 937 } 938 #endif 939 940 /* 941 * Convert Linux TCP level socket option number to NetBSD values. 942 */ 943 int 944 linux_to_bsd_tcp_sockopt(int lopt) 945 { 946 947 switch (lopt) { 948 case LINUX_TCP_NODELAY: 949 return TCP_NODELAY; 950 case LINUX_TCP_MAXSEG: 951 return TCP_MAXSEG; 952 default: 953 return -1; 954 } 955 } 956 957 /* 958 * Convert Linux UDP level socket option number to NetBSD values. 959 */ 960 int 961 linux_to_bsd_udp_sockopt(int lopt) 962 { 963 964 switch (lopt) { 965 default: 966 return -1; 967 } 968 } 969 970 /* 971 * Another reasonably straightforward function: setsockopt(2). 972 * The level and option numbers are converted; the values passed 973 * are not (yet) converted, the ones currently implemented don't 974 * need conversion, as they are the same on both systems. 975 */ 976 int 977 linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval) 978 { 979 /* { 980 syscallarg(int) s; 981 syscallarg(int) level; 982 syscallarg(int) optname; 983 syscallarg(void *) optval; 984 syscallarg(int) optlen; 985 } */ 986 struct sys_setsockopt_args bsa; 987 int name; 988 989 SCARG(&bsa, s) = SCARG(uap, s); 990 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 991 SCARG(&bsa, val) = SCARG(uap, optval); 992 SCARG(&bsa, valsize) = SCARG(uap, optlen); 993 994 /* 995 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 996 * and returns EOPNOTSUPP for other levels 997 */ 998 if (SCARG(&bsa, level) != SOL_SOCKET) { 999 struct socket *so; 1000 int error, family; 1001 1002 /* fd_getsock() will use the descriptor for us */ 1003 if ((error = fd_getsock(SCARG(&bsa, s), &so)) != 0) 1004 return error; 1005 family = so->so_proto->pr_domain->dom_family; 1006 fd_putfile(SCARG(&bsa, s)); 1007 1008 if (family == AF_LOCAL) 1009 return EOPNOTSUPP; 1010 } 1011 1012 switch (SCARG(&bsa, level)) { 1013 case SOL_SOCKET: 1014 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1015 break; 1016 case IPPROTO_IP: 1017 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1018 break; 1019 #ifdef INET6 1020 case IPPROTO_IPV6: 1021 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1022 break; 1023 #endif 1024 case IPPROTO_TCP: 1025 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1026 break; 1027 case IPPROTO_UDP: 1028 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1029 break; 1030 default: 1031 return EINVAL; 1032 } 1033 1034 if (name == -1) 1035 return EINVAL; 1036 SCARG(&bsa, name) = name; 1037 1038 return sys_setsockopt(l, &bsa, retval); 1039 } 1040 1041 /* 1042 * getsockopt(2) is very much the same as setsockopt(2) (see above) 1043 */ 1044 int 1045 linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval) 1046 { 1047 /* { 1048 syscallarg(int) s; 1049 syscallarg(int) level; 1050 syscallarg(int) optname; 1051 syscallarg(void *) optval; 1052 syscallarg(int *) optlen; 1053 } */ 1054 struct sys_getsockopt_args bga; 1055 int name; 1056 1057 SCARG(&bga, s) = SCARG(uap, s); 1058 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 1059 SCARG(&bga, val) = SCARG(uap, optval); 1060 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 1061 1062 switch (SCARG(&bga, level)) { 1063 case SOL_SOCKET: 1064 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1065 break; 1066 case IPPROTO_IP: 1067 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1068 break; 1069 #ifdef INET6 1070 case IPPROTO_IPV6: 1071 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1072 break; 1073 #endif 1074 case IPPROTO_TCP: 1075 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1076 break; 1077 case IPPROTO_UDP: 1078 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1079 break; 1080 default: 1081 return EINVAL; 1082 } 1083 1084 if (name == -1) 1085 return EINVAL; 1086 SCARG(&bga, name) = name; 1087 1088 return sys_getsockopt(l, &bga, retval); 1089 } 1090 1091 int 1092 linux_getifname(struct lwp *l, register_t *retval, void *data) 1093 { 1094 struct ifnet *ifp; 1095 struct linux_ifreq ifr; 1096 int error; 1097 1098 error = copyin(data, &ifr, sizeof(ifr)); 1099 if (error) 1100 return error; 1101 1102 ifp = if_byindex(ifr.ifr_ifru.ifru_ifindex); 1103 if (ifp == NULL) 1104 return ENODEV; 1105 1106 strncpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 1107 1108 return copyout(&ifr, data, sizeof(ifr)); 1109 } 1110 1111 int 1112 linux_getifconf(struct lwp *l, register_t *retval, void *data) 1113 { 1114 struct linux_ifreq ifr, *ifrp = NULL; 1115 struct linux_ifconf ifc; 1116 struct ifnet *ifp; 1117 struct ifaddr *ifa; 1118 struct sockaddr *sa; 1119 struct osockaddr *osa; 1120 int space = 0, error = 0; 1121 const int sz = (int)sizeof(ifr); 1122 bool docopy; 1123 1124 error = copyin(data, &ifc, sizeof(ifc)); 1125 if (error) 1126 return error; 1127 1128 docopy = ifc.ifc_req != NULL; 1129 if (docopy) { 1130 space = ifc.ifc_len; 1131 ifrp = ifc.ifc_req; 1132 } 1133 1134 IFNET_FOREACH(ifp) { 1135 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1136 sizeof(ifr.ifr_name)); 1137 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1138 return ENAMETOOLONG; 1139 if (IFADDR_EMPTY(ifp)) 1140 continue; 1141 IFADDR_FOREACH(ifa, ifp) { 1142 sa = ifa->ifa_addr; 1143 if (sa->sa_family != AF_INET || 1144 sa->sa_len > sizeof(*osa)) 1145 continue; 1146 memcpy(&ifr.ifr_addr, sa, sa->sa_len); 1147 osa = (struct osockaddr *)&ifr.ifr_addr; 1148 osa->sa_family = sa->sa_family; 1149 if (space >= sz) { 1150 error = copyout(&ifr, ifrp, sz); 1151 if (error != 0) 1152 return error; 1153 ifrp++; 1154 } 1155 space -= sz; 1156 } 1157 } 1158 1159 if (docopy) 1160 ifc.ifc_len -= space; 1161 else 1162 ifc.ifc_len = -space; 1163 1164 return copyout(&ifc, data, sizeof(ifc)); 1165 } 1166 1167 int 1168 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 1169 void *data) 1170 { 1171 /* Not the full structure, just enough to map what we do here */ 1172 struct linux_ifreq lreq; 1173 file_t *fp; 1174 struct ifaddr *ifa; 1175 struct ifnet *ifp; 1176 struct sockaddr_dl *sadl; 1177 int error, found; 1178 int index, ifnum; 1179 1180 /* 1181 * We can't emulate this ioctl by calling sys_ioctl() to run 1182 * SIOCGIFCONF, because the user buffer is not of the right 1183 * type to take those results. We can't use kernel buffers to 1184 * receive the results, as the implementation of sys_ioctl() 1185 * and ifconf() [which implements SIOCGIFCONF] use 1186 * copyin()/copyout() which will fail on kernel addresses. 1187 * 1188 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1189 */ 1190 1191 if ((fp = fd_getfile(fd)) == NULL) 1192 return (EBADF); 1193 1194 KERNEL_LOCK(1, NULL); 1195 1196 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1197 error = EBADF; 1198 goto out; 1199 } 1200 1201 error = copyin(data, &lreq, sizeof(lreq)); 1202 if (error) 1203 goto out; 1204 lreq.ifr_name[LINUX_IFNAMSIZ-1] = '\0'; /* just in case */ 1205 1206 /* 1207 * Try real interface name first, then fake "ethX" 1208 */ 1209 found = 0; 1210 IFNET_FOREACH(ifp) { 1211 if (found) 1212 break; 1213 if (strcmp(lreq.ifr_name, ifp->if_xname)) 1214 /* not this interface */ 1215 continue; 1216 found=1; 1217 if (IFADDR_EMPTY(ifp)) { 1218 error = ENODEV; 1219 goto out; 1220 } 1221 IFADDR_FOREACH(ifa, ifp) { 1222 sadl = satosdl(ifa->ifa_addr); 1223 /* only return ethernet addresses */ 1224 /* XXX what about FDDI, etc. ? */ 1225 if (sadl->sdl_family != AF_LINK || 1226 sadl->sdl_type != IFT_ETHER) 1227 continue; 1228 memcpy(&lreq.ifr_hwaddr.sa_data, CLLADDR(sadl), 1229 MIN(sadl->sdl_alen, 1230 sizeof(lreq.ifr_hwaddr.sa_data))); 1231 lreq.ifr_hwaddr.sa_family = 1232 sadl->sdl_family; 1233 error = copyout(&lreq, data, sizeof(lreq)); 1234 goto out; 1235 } 1236 } 1237 1238 if (strncmp(lreq.ifr_name, "eth", 3) != 0) { 1239 /* unknown interface, not even an "eth*" name */ 1240 error = ENODEV; 1241 goto out; 1242 } 1243 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 1280 out: 1281 KERNEL_UNLOCK_ONE(NULL); 1282 fd_putfile(fd); 1283 return error; 1284 } 1285 1286 int 1287 linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) 1288 { 1289 /* { 1290 syscallarg(int) fd; 1291 syscallarg(u_long) com; 1292 syscallarg(void *) data; 1293 } */ 1294 u_long com; 1295 int error = 0, isdev = 0, dosys = 1; 1296 struct sys_ioctl_args ia; 1297 file_t *fp; 1298 struct vnode *vp; 1299 int (*ioctlf)(file_t *, u_long, void *); 1300 struct ioctl_pt pt; 1301 1302 if ((fp = fd_getfile(SCARG(uap, fd))) == NULL) 1303 return (EBADF); 1304 1305 if (fp->f_type == DTYPE_VNODE) { 1306 vp = (struct vnode *)fp->f_data; 1307 isdev = vp->v_type == VCHR; 1308 } 1309 1310 /* 1311 * Don't try to interpret socket ioctl calls that are done 1312 * on a device filedescriptor, just pass them through, to 1313 * emulate Linux behaviour. Use PTIOCLINUX so that the 1314 * device will only handle these if it's prepared to do 1315 * so, to avoid unexpected things from happening. 1316 */ 1317 if (isdev) { 1318 dosys = 0; 1319 ioctlf = fp->f_ops->fo_ioctl; 1320 pt.com = SCARG(uap, com); 1321 pt.data = SCARG(uap, data); 1322 error = ioctlf(fp, PTIOCLINUX, &pt); 1323 /* 1324 * XXX hack: if the function returns EJUSTRETURN, 1325 * it has stuffed a sysctl return value in pt.data. 1326 */ 1327 if (error == EJUSTRETURN) { 1328 retval[0] = (register_t)pt.data; 1329 error = 0; 1330 } 1331 goto out; 1332 } 1333 1334 com = SCARG(uap, com); 1335 retval[0] = 0; 1336 1337 switch (com) { 1338 case LINUX_SIOCGIFNAME: 1339 error = linux_getifname(l, retval, SCARG(uap, data)); 1340 dosys = 0; 1341 break; 1342 case LINUX_SIOCGIFCONF: 1343 error = linux_getifconf(l, retval, SCARG(uap, data)); 1344 dosys = 0; 1345 break; 1346 case LINUX_SIOCGIFFLAGS: 1347 SCARG(&ia, com) = OSIOCGIFFLAGS; 1348 break; 1349 case LINUX_SIOCSIFFLAGS: 1350 SCARG(&ia, com) = OSIOCSIFFLAGS; 1351 break; 1352 case LINUX_SIOCGIFADDR: 1353 SCARG(&ia, com) = OOSIOCGIFADDR; 1354 break; 1355 case LINUX_SIOCGIFDSTADDR: 1356 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1357 break; 1358 case LINUX_SIOCGIFBRDADDR: 1359 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1360 break; 1361 case LINUX_SIOCGIFNETMASK: 1362 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1363 break; 1364 case LINUX_SIOCGIFMTU: 1365 SCARG(&ia, com) = OSIOCGIFMTU; 1366 break; 1367 case LINUX_SIOCADDMULTI: 1368 SCARG(&ia, com) = OSIOCADDMULTI; 1369 break; 1370 case LINUX_SIOCDELMULTI: 1371 SCARG(&ia, com) = OSIOCDELMULTI; 1372 break; 1373 case LINUX_SIOCGIFHWADDR: 1374 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1375 SCARG(uap, data)); 1376 dosys = 0; 1377 break; 1378 default: 1379 error = EINVAL; 1380 } 1381 1382 out: 1383 fd_putfile(SCARG(uap, fd)); 1384 1385 if (error ==0 && dosys) { 1386 SCARG(&ia, fd) = SCARG(uap, fd); 1387 SCARG(&ia, data) = SCARG(uap, data); 1388 error = sys_ioctl(curlwp, &ia, retval); 1389 } 1390 1391 return error; 1392 } 1393 1394 int 1395 linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval) 1396 { 1397 /* { 1398 syscallarg(int) s; 1399 syscallarg(const struct sockaddr *) name; 1400 syscallarg(int) namelen; 1401 } */ 1402 int error; 1403 struct mbuf *nam; 1404 1405 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1406 SCARG(uap, namelen)); 1407 if (error) 1408 return (error); 1409 1410 error = do_sys_connect(l, SCARG(uap, s), nam); 1411 1412 if (error == EISCONN) { 1413 struct socket *so; 1414 int state, prflags; 1415 1416 /* fd_getsock() will use the descriptor for us */ 1417 if (fd_getsock(SCARG(uap, s), &so) != 0) 1418 return EISCONN; 1419 1420 solock(so); 1421 state = so->so_state; 1422 prflags = so->so_proto->pr_flags; 1423 sounlock(so); 1424 fd_putfile(SCARG(uap, s)); 1425 /* 1426 * We should only let this call succeed once per 1427 * non-blocking connect; however we don't have 1428 * a convenient place to keep that state.. 1429 */ 1430 if ((state & (SS_ISCONNECTED|SS_NBIO)) == 1431 (SS_ISCONNECTED|SS_NBIO) && 1432 (prflags & PR_CONNREQUIRED)) 1433 return 0; 1434 } 1435 1436 return (error); 1437 } 1438 1439 int 1440 linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval) 1441 { 1442 /* { 1443 syscallarg(int) s; 1444 syscallarg(const struct osockaddr *) name; 1445 syscallarg(int) namelen; 1446 } */ 1447 int error; 1448 struct mbuf *nam; 1449 1450 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1451 SCARG(uap, namelen)); 1452 if (error) 1453 return (error); 1454 1455 return do_sys_bind(l, SCARG(uap, s), nam); 1456 } 1457 1458 int 1459 linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval) 1460 { 1461 /* { 1462 syscallarg(int) fdes; 1463 syscallarg(void *) asa; 1464 syscallarg(int *) alen; 1465 } */ 1466 int error; 1467 1468 if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0) 1469 return (error); 1470 1471 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1472 return (error); 1473 1474 return (0); 1475 } 1476 1477 int 1478 linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval) 1479 { 1480 /* { 1481 syscallarg(int) fdes; 1482 syscallarg(void *) asa; 1483 syscallarg(int *) alen; 1484 } */ 1485 int error; 1486 1487 if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0) 1488 return (error); 1489 1490 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1491 return (error); 1492 1493 return (0); 1494 } 1495 1496 /* 1497 * Copy the osockaddr structure pointed to by osa to mbuf, adjust 1498 * family and convert to sockaddr. 1499 */ 1500 static int 1501 linux_get_sa(struct lwp *l, int s, struct mbuf **mp, 1502 const struct osockaddr *osa, unsigned int salen) 1503 { 1504 int error, bdom; 1505 struct sockaddr *sa; 1506 struct osockaddr *kosa; 1507 struct mbuf *m; 1508 1509 if (salen == 1 || salen > UCHAR_MAX) { 1510 DPRINTF(("bad osa=%p salen=%d\n", osa, salen)); 1511 return EINVAL; 1512 } 1513 1514 /* We'll need the address in an mbuf later, so copy into one here */ 1515 m = m_get(M_WAIT, MT_SONAME); 1516 if (salen > MLEN) 1517 MEXTMALLOC(m, salen, M_WAITOK); 1518 1519 m->m_len = salen; 1520 1521 if (salen == 0) { 1522 *mp = m; 1523 return 0; 1524 } 1525 1526 kosa = mtod(m, void *); 1527 if ((error = copyin(osa, kosa, salen))) { 1528 DPRINTF(("error %d copying osa %p len %d\n", 1529 error, osa, salen)); 1530 goto bad; 1531 } 1532 1533 ktrkuser("linux/sockaddr", kosa, salen); 1534 1535 bdom = linux_to_bsd_domain(kosa->sa_family); 1536 if (bdom == -1) { 1537 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1538 error = EINVAL; 1539 goto bad; 1540 } 1541 1542 /* 1543 * If the family is unspecified, use address family of the socket. 1544 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1545 */ 1546 if (bdom == AF_UNSPEC) { 1547 struct socket *so; 1548 1549 /* fd_getsock() will use the descriptor for us */ 1550 if ((error = fd_getsock(s, &so)) != 0) 1551 goto bad; 1552 1553 bdom = so->so_proto->pr_domain->dom_family; 1554 fd_putfile(s); 1555 1556 DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom)); 1557 } 1558 1559 /* 1560 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1561 * which lacks the scope id compared with RFC2553 one. If we detect 1562 * the situation, reject the address and write a message to system log. 1563 * 1564 * Still accept addresses for which the scope id is not used. 1565 */ 1566 if (bdom == AF_INET6 && salen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1567 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)kosa; 1568 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1569 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1570 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1571 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1572 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1573 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1574 struct proc *p = l->l_proc; 1575 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1576 1577 log(LOG_DEBUG, 1578 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1579 "sockaddr_in6 rejected", 1580 p->p_pid, p->p_comm, uid); 1581 error = EINVAL; 1582 goto bad; 1583 } 1584 salen = sizeof (struct sockaddr_in6); 1585 sin6->sin6_scope_id = 0; 1586 } 1587 1588 if (bdom == AF_INET) 1589 salen = sizeof(struct sockaddr_in); 1590 1591 sa = (struct sockaddr *) kosa; 1592 sa->sa_family = bdom; 1593 sa->sa_len = salen; 1594 m->m_len = salen; 1595 ktrkuser("mbsoname", kosa, salen); 1596 1597 #ifdef DEBUG_LINUX 1598 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1599 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1600 DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom])); 1601 DPRINTF(("\n")); 1602 #endif 1603 1604 *mp = m; 1605 return 0; 1606 1607 bad: 1608 m_free(m); 1609 return error; 1610 } 1611 1612 static int 1613 linux_sa_put(struct osockaddr *osa) 1614 { 1615 struct sockaddr sa; 1616 struct osockaddr *kosa; 1617 int error, bdom, len; 1618 1619 /* 1620 * Only read/write the sockaddr family and length part, the rest is 1621 * not changed. 1622 */ 1623 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1624 1625 error = copyin(osa, &sa, len); 1626 if (error) 1627 return (error); 1628 1629 bdom = bsd_to_linux_domain(sa.sa_family); 1630 if (bdom == -1) 1631 return (EINVAL); 1632 1633 /* Note: we convert from sockaddr to osockaddr here, too */ 1634 kosa = (struct osockaddr *) &sa; 1635 kosa->sa_family = bdom; 1636 error = copyout(kosa, osa, len); 1637 if (error) 1638 return (error); 1639 1640 return (0); 1641 } 1642 1643 #ifndef __amd64__ 1644 int 1645 linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval) 1646 { 1647 /* { 1648 syscallarg(int) s; 1649 syscallarg(void *) buf; 1650 syscallarg(int) len; 1651 syscallarg(int) flags; 1652 } */ 1653 struct sys_recvfrom_args bra; 1654 1655 1656 SCARG(&bra, s) = SCARG(uap, s); 1657 SCARG(&bra, buf) = SCARG(uap, buf); 1658 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1659 SCARG(&bra, flags) = SCARG(uap, flags); 1660 SCARG(&bra, from) = NULL; 1661 SCARG(&bra, fromlenaddr) = NULL; 1662 1663 return (sys_recvfrom(l, &bra, retval)); 1664 } 1665 1666 int 1667 linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval) 1668 { 1669 /* { 1670 syscallarg(int) s; 1671 syscallarg(void *) buf; 1672 syscallarg(int) len; 1673 syscallarg(int) flags; 1674 } */ 1675 struct sys_sendto_args bsa; 1676 1677 SCARG(&bsa, s) = SCARG(uap, s); 1678 SCARG(&bsa, buf) = SCARG(uap, buf); 1679 SCARG(&bsa, len) = SCARG(uap, len); 1680 SCARG(&bsa, flags) = SCARG(uap, flags); 1681 SCARG(&bsa, to) = NULL; 1682 SCARG(&bsa, tolen) = 0; 1683 1684 return (sys_sendto(l, &bsa, retval)); 1685 } 1686 #endif 1687 1688 int 1689 linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval) 1690 { 1691 /* { 1692 syscallarg(int) s; 1693 syscallarg(struct osockaddr *) name; 1694 syscallarg(int *) anamelen; 1695 } */ 1696 int error; 1697 struct sys_accept_args baa; 1698 1699 SCARG(&baa, s) = SCARG(uap, s); 1700 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1701 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1702 1703 if ((error = sys_accept(l, &baa, retval))) 1704 return (error); 1705 1706 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1707 return (error); 1708 1709 return (0); 1710 } 1711