1 /* $NetBSD: linux_socket.c,v 1.123 2015/04/03 20:01:07 rtr 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 1.123 2015/04/03 20:01:07 rtr 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_get_sa_sb(struct lwp *, int, struct sockaddr_big *, 125 const struct osockaddr *, socklen_t); 126 static int linux_sa_put(struct osockaddr *osa); 127 static int linux_to_bsd_msg_flags(int); 128 static int bsd_to_linux_msg_flags(int); 129 static void linux_to_bsd_msghdr(struct linux_msghdr *, struct msghdr *); 130 static void bsd_to_linux_msghdr(struct msghdr *, struct linux_msghdr *); 131 132 static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { 133 AF_UNSPEC, 134 AF_UNIX, 135 AF_INET, 136 AF_CCITT, /* LINUX_AF_AX25 */ 137 AF_IPX, 138 AF_APPLETALK, 139 -1, /* LINUX_AF_NETROM */ 140 -1, /* LINUX_AF_BRIDGE */ 141 -1, /* LINUX_AF_ATMPVC */ 142 AF_CCITT, /* LINUX_AF_X25 */ 143 AF_INET6, 144 -1, /* LINUX_AF_ROSE */ 145 AF_DECnet, 146 -1, /* LINUX_AF_NETBEUI */ 147 -1, /* LINUX_AF_SECURITY */ 148 pseudo_AF_KEY, 149 AF_ROUTE, /* LINUX_AF_NETLINK */ 150 -1, /* LINUX_AF_PACKET */ 151 -1, /* LINUX_AF_ASH */ 152 -1, /* LINUX_AF_ECONET */ 153 -1, /* LINUX_AF_ATMSVC */ 154 AF_SNA, 155 /* rest up to LINUX_AF_MAX-1 is not allocated */ 156 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 157 }; 158 159 static const int bsd_to_linux_domain_[AF_MAX] = { 160 LINUX_AF_UNSPEC, 161 LINUX_AF_UNIX, 162 LINUX_AF_INET, 163 -1, /* AF_IMPLINK */ 164 -1, /* AF_PUP */ 165 -1, /* AF_CHAOS */ 166 -1, /* AF_NS */ 167 -1, /* AF_ISO */ 168 -1, /* AF_ECMA */ 169 -1, /* AF_DATAKIT */ 170 LINUX_AF_AX25, /* AF_CCITT */ 171 LINUX_AF_SNA, 172 LINUX_AF_DECnet, 173 -1, /* AF_DLI */ 174 -1, /* AF_LAT */ 175 -1, /* AF_HYLINK */ 176 LINUX_AF_APPLETALK, 177 LINUX_AF_NETLINK, 178 -1, /* AF_LINK */ 179 -1, /* AF_XTP */ 180 -1, /* AF_COIP */ 181 -1, /* AF_CNT */ 182 -1, /* pseudo_AF_RTIP */ 183 LINUX_AF_IPX, 184 LINUX_AF_INET6, 185 -1, /* pseudo_AF_PIP */ 186 -1, /* AF_ISDN */ 187 -1, /* AF_NATM */ 188 -1, /* AF_ARP */ 189 LINUX_pseudo_AF_KEY, 190 -1, /* pseudo_AF_HDRCMPLT */ 191 }; 192 193 static const struct { 194 int bfl; 195 int lfl; 196 } bsd_to_linux_msg_flags_[] = { 197 {MSG_OOB, LINUX_MSG_OOB}, 198 {MSG_PEEK, LINUX_MSG_PEEK}, 199 {MSG_DONTROUTE, LINUX_MSG_DONTROUTE}, 200 {MSG_EOR, LINUX_MSG_EOR}, 201 {MSG_TRUNC, LINUX_MSG_TRUNC}, 202 {MSG_CTRUNC, LINUX_MSG_CTRUNC}, 203 {MSG_WAITALL, LINUX_MSG_WAITALL}, 204 {MSG_DONTWAIT, LINUX_MSG_DONTWAIT}, 205 {MSG_BCAST, 0}, /* not supported, clear */ 206 {MSG_MCAST, 0}, /* not supported, clear */ 207 {MSG_NOSIGNAL, LINUX_MSG_NOSIGNAL}, 208 {-1, /* not supp */ LINUX_MSG_PROBE}, 209 {-1, /* not supp */ LINUX_MSG_FIN}, 210 {-1, /* not supp */ LINUX_MSG_SYN}, 211 {-1, /* not supp */ LINUX_MSG_CONFIRM}, 212 {-1, /* not supp */ LINUX_MSG_RST}, 213 {-1, /* not supp */ LINUX_MSG_ERRQUEUE}, 214 {-1, /* not supp */ LINUX_MSG_MORE}, 215 }; 216 217 /* 218 * Convert between Linux and BSD socket domain values 219 */ 220 static int 221 linux_to_bsd_domain(int ldom) 222 { 223 if (ldom < 0 || ldom >= LINUX_AF_MAX) 224 return (-1); 225 226 return linux_to_bsd_domain_[ldom]; 227 } 228 229 /* 230 * Convert between BSD and Linux socket domain values 231 */ 232 static int 233 bsd_to_linux_domain(int bdom) 234 { 235 if (bdom < 0 || bdom >= AF_MAX) 236 return (-1); 237 238 return bsd_to_linux_domain_[bdom]; 239 } 240 241 static int 242 linux_to_bsd_type(int ltype) 243 { 244 int type, flags; 245 246 /* Real types are identical between Linux and NetBSD */ 247 type = ltype & LINUX_SOCK_TYPE_MASK; 248 249 /* But flags are not .. */ 250 flags = ltype & ~LINUX_SOCK_TYPE_MASK; 251 if (flags & ~(LINUX_SOCK_CLOEXEC|LINUX_SOCK_NONBLOCK)) 252 return -1; 253 254 if (flags & LINUX_SOCK_CLOEXEC) 255 type |= SOCK_CLOEXEC; 256 if (flags & LINUX_SOCK_NONBLOCK) 257 type |= SOCK_NONBLOCK; 258 259 return type; 260 } 261 262 static int 263 linux_to_bsd_msg_flags(int lflag) 264 { 265 int i, lfl, bfl; 266 int bflag = 0; 267 268 if (lflag == 0) 269 return (0); 270 271 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 272 bfl = bsd_to_linux_msg_flags_[i].bfl; 273 lfl = bsd_to_linux_msg_flags_[i].lfl; 274 275 if (lfl == 0) 276 continue; 277 278 if (lflag & lfl) { 279 if (bfl < 0) 280 return (-1); 281 282 bflag |= bfl; 283 } 284 } 285 286 return (bflag); 287 } 288 289 static int 290 bsd_to_linux_msg_flags(int bflag) 291 { 292 int i, lfl, bfl; 293 int lflag = 0; 294 295 if (bflag == 0) 296 return (0); 297 298 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 299 bfl = bsd_to_linux_msg_flags_[i].bfl; 300 lfl = bsd_to_linux_msg_flags_[i].lfl; 301 302 if (bfl <= 0) 303 continue; 304 305 if (bflag & bfl) { 306 if (lfl < 0) 307 return (-1); 308 309 lflag |= lfl; 310 } 311 } 312 313 return (lflag); 314 } 315 316 int 317 linux_sys_socket(struct lwp *l, const struct linux_sys_socket_args *uap, register_t *retval) 318 { 319 /* { 320 syscallarg(int) domain; 321 syscallarg(int) type; 322 syscallarg(int) protocol; 323 } */ 324 struct sys___socket30_args bsa; 325 int error; 326 327 328 SCARG(&bsa, protocol) = SCARG(uap, protocol); 329 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 330 if (SCARG(&bsa, domain) == -1) 331 return EINVAL; 332 SCARG(&bsa, type) = linux_to_bsd_type(SCARG(uap, type)); 333 if (SCARG(&bsa, type) == -1) 334 return EINVAL; 335 /* 336 * Apparently linux uses this to talk to ISDN sockets. If we fail 337 * now programs seems to handle it, but if we don't we are going 338 * to fail when we bind and programs don't handle this well. 339 */ 340 if (SCARG(&bsa, domain) == AF_ROUTE && SCARG(&bsa, type) == SOCK_RAW) 341 return ENOTSUP; 342 error = sys___socket30(l, &bsa, retval); 343 344 #ifdef INET6 345 /* 346 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 347 * default and some apps depend on this. So, set V6ONLY to 0 348 * for Linux apps if the sysctl value is set to 1. 349 */ 350 if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { 351 struct socket *so; 352 353 if (fd_getsock(*retval, &so) == 0) { 354 int val = 0; 355 356 /* ignore error */ 357 (void)so_setsockopt(l, so, IPPROTO_IPV6, IPV6_V6ONLY, 358 &val, sizeof(val)); 359 360 fd_putfile(*retval); 361 } 362 } 363 #endif 364 365 return (error); 366 } 367 368 int 369 linux_sys_socketpair(struct lwp *l, const struct linux_sys_socketpair_args *uap, register_t *retval) 370 { 371 /* { 372 syscallarg(int) domain; 373 syscallarg(int) type; 374 syscallarg(int) protocol; 375 syscallarg(int *) rsv; 376 } */ 377 struct sys_socketpair_args bsa; 378 379 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 380 if (SCARG(&bsa, domain) == -1) 381 return EINVAL; 382 SCARG(&bsa, type) = linux_to_bsd_type(SCARG(uap, type)); 383 if (SCARG(&bsa, type) == -1) 384 return EINVAL; 385 SCARG(&bsa, protocol) = SCARG(uap, protocol); 386 SCARG(&bsa, rsv) = SCARG(uap, rsv); 387 388 return sys_socketpair(l, &bsa, retval); 389 } 390 391 int 392 linux_sys_sendto(struct lwp *l, const struct linux_sys_sendto_args *uap, register_t *retval) 393 { 394 /* { 395 syscallarg(int) s; 396 syscallarg(void *) msg; 397 syscallarg(int) len; 398 syscallarg(int) flags; 399 syscallarg(struct osockaddr *) to; 400 syscallarg(int) tolen; 401 } */ 402 struct msghdr msg; 403 struct iovec aiov; 404 struct mbuf *nam; 405 int bflags; 406 int error; 407 408 /* Translate message flags. */ 409 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 410 if (bflags < 0) 411 /* Some supported flag */ 412 return EINVAL; 413 414 msg.msg_flags = 0; 415 msg.msg_name = NULL; 416 msg.msg_control = NULL; 417 418 if (SCARG(uap, tolen)) { 419 /* Read in and convert the sockaddr */ 420 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to), 421 SCARG(uap, tolen)); 422 if (error) 423 return (error); 424 msg.msg_flags |= MSG_NAMEMBUF; 425 msg.msg_name = nam; 426 msg.msg_namelen = SCARG(uap, tolen); 427 } 428 429 msg.msg_iov = &aiov; 430 msg.msg_iovlen = 1; 431 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 432 aiov.iov_len = SCARG(uap, len); 433 434 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 435 } 436 437 static void 438 linux_to_bsd_msghdr(struct linux_msghdr *lmsg, struct msghdr *bmsg) 439 { 440 bmsg->msg_name = lmsg->msg_name; 441 bmsg->msg_namelen = lmsg->msg_namelen; 442 bmsg->msg_iov = lmsg->msg_iov; 443 bmsg->msg_iovlen = lmsg->msg_iovlen; 444 bmsg->msg_control = lmsg->msg_control; 445 bmsg->msg_controllen = lmsg->msg_controllen; 446 bmsg->msg_flags = lmsg->msg_flags; 447 } 448 449 static void 450 bsd_to_linux_msghdr(struct msghdr *bmsg, struct linux_msghdr *lmsg) 451 { 452 lmsg->msg_name = bmsg->msg_name; 453 lmsg->msg_namelen = bmsg->msg_namelen; 454 lmsg->msg_iov = bmsg->msg_iov; 455 lmsg->msg_iovlen = bmsg->msg_iovlen; 456 lmsg->msg_control = bmsg->msg_control; 457 lmsg->msg_controllen = bmsg->msg_controllen; 458 lmsg->msg_flags = bmsg->msg_flags; 459 } 460 461 int 462 linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval) 463 { 464 /* { 465 syscallarg(int) s; 466 syscallarg(struct linux_msghdr *) msg; 467 syscallarg(u_int) flags; 468 } */ 469 struct msghdr msg; 470 struct linux_msghdr lmsg; 471 int error; 472 int bflags; 473 struct mbuf *nam; 474 u_int8_t *control; 475 struct mbuf *ctl_mbuf = NULL; 476 477 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 478 if (error) 479 return error; 480 linux_to_bsd_msghdr(&lmsg, &msg); 481 482 msg.msg_flags = MSG_IOVUSRSPACE; 483 484 /* 485 * Translate message flags. 486 */ 487 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 488 if (bflags < 0) 489 /* Some supported flag */ 490 return EINVAL; 491 492 if (lmsg.msg_name) { 493 /* Read in and convert the sockaddr */ 494 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 495 msg.msg_namelen); 496 if (error) 497 return (error); 498 msg.msg_flags |= MSG_NAMEMBUF; 499 msg.msg_name = nam; 500 } 501 502 /* 503 * Handle cmsg if there is any. 504 */ 505 if (LINUX_CMSG_FIRSTHDR(&lmsg)) { 506 struct linux_cmsghdr l_cmsg, *l_cc; 507 struct cmsghdr *cmsg; 508 ssize_t resid = msg.msg_controllen; 509 size_t clen, cidx = 0, cspace; 510 511 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 512 clen = MLEN; 513 control = mtod(ctl_mbuf, void *); 514 515 l_cc = LINUX_CMSG_FIRSTHDR(&lmsg); 516 do { 517 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 518 if (error) 519 goto done; 520 521 /* 522 * Sanity check the control message length. 523 */ 524 if (l_cmsg.cmsg_len > resid 525 || l_cmsg.cmsg_len < sizeof l_cmsg) { 526 error = EINVAL; 527 goto done; 528 } 529 530 /* 531 * Refuse unsupported control messages, and 532 * translate fields as appropriate. 533 */ 534 switch (l_cmsg.cmsg_level) { 535 case LINUX_SOL_SOCKET: 536 /* It only differs on some archs */ 537 if (LINUX_SOL_SOCKET != SOL_SOCKET) 538 l_cmsg.cmsg_level = SOL_SOCKET; 539 540 switch(l_cmsg.cmsg_type) { 541 case LINUX_SCM_RIGHTS: 542 /* Linux SCM_RIGHTS is same as NetBSD */ 543 break; 544 545 case LINUX_SCM_CREDENTIALS: 546 /* no native equivalent, just drop it */ 547 m_free(ctl_mbuf); 548 ctl_mbuf = NULL; 549 msg.msg_control = NULL; 550 msg.msg_controllen = 0; 551 goto skipcmsg; 552 553 default: 554 /* other types not supported */ 555 error = EINVAL; 556 goto done; 557 } 558 break; 559 default: 560 /* pray and leave intact */ 561 break; 562 } 563 564 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 565 566 /* Check the buffer is big enough */ 567 if (__predict_false(cidx + cspace > clen)) { 568 u_int8_t *nc; 569 570 clen = cidx + cspace; 571 if (clen >= PAGE_SIZE) { 572 error = EINVAL; 573 goto done; 574 } 575 nc = realloc(clen <= MLEN ? NULL : control, 576 clen, M_TEMP, M_WAITOK); 577 if (!nc) { 578 error = ENOMEM; 579 goto done; 580 } 581 if (cidx <= MLEN) 582 /* Old buffer was in mbuf... */ 583 memcpy(nc, control, cidx); 584 control = nc; 585 } 586 587 /* Copy header */ 588 cmsg = (void *)&control[cidx]; 589 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 590 cmsg->cmsg_level = l_cmsg.cmsg_level; 591 cmsg->cmsg_type = l_cmsg.cmsg_type; 592 593 /* Zero area between header and data */ 594 memset(cmsg + 1, 0, 595 CMSG_ALIGN(sizeof(*cmsg)) - sizeof(*cmsg)); 596 597 /* Copyin the data */ 598 error = copyin(LINUX_CMSG_DATA(l_cc), 599 CMSG_DATA(cmsg), 600 l_cmsg.cmsg_len - sizeof(l_cmsg)); 601 if (error) 602 goto done; 603 604 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 605 cidx += cspace; 606 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 607 608 /* If we allocated a buffer, attach to mbuf */ 609 if (cidx > MLEN) { 610 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 611 ctl_mbuf->m_flags |= M_EXT_RW; 612 } 613 control = NULL; 614 ctl_mbuf->m_len = cidx; 615 616 msg.msg_control = ctl_mbuf; 617 msg.msg_flags |= MSG_CONTROLMBUF; 618 619 ktrkuser("mbcontrol", mtod(ctl_mbuf, void *), 620 msg.msg_controllen); 621 } 622 623 skipcmsg: 624 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 625 /* Freed internally */ 626 ctl_mbuf = NULL; 627 628 done: 629 if (ctl_mbuf != NULL) { 630 if (control != NULL && control != mtod(ctl_mbuf, void *)) 631 free(control, M_MBUF); 632 m_free(ctl_mbuf); 633 } 634 return (error); 635 } 636 637 int 638 linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval) 639 { 640 /* { 641 syscallarg(int) s; 642 syscallarg(void *) buf; 643 syscallarg(int) len; 644 syscallarg(int) flags; 645 syscallarg(struct osockaddr *) from; 646 syscallarg(int *) fromlenaddr; 647 } */ 648 int error; 649 struct sys_recvfrom_args bra; 650 651 SCARG(&bra, s) = SCARG(uap, s); 652 SCARG(&bra, buf) = SCARG(uap, buf); 653 SCARG(&bra, len) = SCARG(uap, len); 654 SCARG(&bra, flags) = SCARG(uap, flags); 655 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 656 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 657 658 if ((error = sys_recvfrom(l, &bra, retval))) 659 return (error); 660 661 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 662 return (error); 663 664 return (0); 665 } 666 667 static int 668 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 669 { 670 int dlen, error = 0; 671 struct cmsghdr *cmsg; 672 struct linux_cmsghdr linux_cmsg; 673 struct mbuf *m; 674 char *q, *q_end; 675 676 if (mp->msg_controllen <= 0 || control == 0) { 677 mp->msg_controllen = 0; 678 free_control_mbuf(l, control, control); 679 return 0; 680 } 681 682 ktrkuser("msgcontrol", mtod(control, void *), mp->msg_controllen); 683 684 q = (char *)mp->msg_control; 685 q_end = q + mp->msg_controllen; 686 687 for (m = control; m != NULL; ) { 688 cmsg = mtod(m, struct cmsghdr *); 689 690 /* 691 * Fixup cmsg. We handle two things: 692 * 0. different sizeof cmsg_len. 693 * 1. different values for level/type on some archs 694 * 2. different alignment of CMSG_DATA on some archs 695 */ 696 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 697 linux_cmsg.cmsg_level = cmsg->cmsg_level; 698 linux_cmsg.cmsg_type = cmsg->cmsg_type; 699 700 dlen = q_end - q; 701 if (linux_cmsg.cmsg_len > dlen) { 702 /* Not enough room for the parameter */ 703 dlen -= sizeof linux_cmsg; 704 if (dlen <= 0) 705 /* Discard if header wont fit */ 706 break; 707 mp->msg_flags |= MSG_CTRUNC; 708 if (linux_cmsg.cmsg_level == SOL_SOCKET 709 && linux_cmsg.cmsg_type == SCM_RIGHTS) 710 /* Do not truncate me ... */ 711 break; 712 } else 713 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 714 715 switch (linux_cmsg.cmsg_level) { 716 case SOL_SOCKET: 717 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 718 switch (linux_cmsg.cmsg_type) { 719 case SCM_RIGHTS: 720 /* Linux SCM_RIGHTS is same as NetBSD */ 721 break; 722 723 default: 724 /* other types not supported */ 725 error = EINVAL; 726 goto done; 727 } 728 /* machine dependent ! */ 729 break; 730 default: 731 /* pray and leave intact */ 732 break; 733 } 734 735 /* There can be padding between the header and data... */ 736 error = copyout(&linux_cmsg, q, sizeof linux_cmsg); 737 if (error != 0) { 738 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 739 dlen); 740 } 741 if (error != 0) { 742 /* We must free all the SCM_RIGHTS */ 743 m = control; 744 break; 745 } 746 m = m->m_next; 747 if (m == NULL || q + LINUX_CMSG_SPACE(dlen) > q_end) { 748 q += LINUX_CMSG_LEN(dlen); 749 break; 750 } 751 q += LINUX_CMSG_SPACE(dlen); 752 } 753 754 done: 755 free_control_mbuf(l, control, m); 756 757 mp->msg_controllen = q - (char *)mp->msg_control; 758 return error; 759 } 760 761 int 762 linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval) 763 { 764 /* { 765 syscallarg(int) s; 766 syscallarg(struct linux_msghdr *) msg; 767 syscallarg(u_int) flags; 768 } */ 769 struct msghdr msg; 770 struct linux_msghdr lmsg; 771 int error; 772 struct mbuf *from, *control; 773 774 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 775 if (error) 776 return (error); 777 linux_to_bsd_msghdr(&lmsg, &msg); 778 779 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 780 if (msg.msg_flags < 0) { 781 /* Some unsupported flag */ 782 return (EINVAL); 783 } 784 msg.msg_flags |= MSG_IOVUSRSPACE; 785 786 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 787 msg.msg_control != NULL ? &control : NULL, retval); 788 if (error != 0) 789 return error; 790 791 if (msg.msg_control != NULL) 792 error = linux_copyout_msg_control(l, &msg, control); 793 794 if (error == 0 && from != 0) { 795 mtod(from, struct osockaddr *)->sa_family = 796 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 797 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 798 from); 799 } else 800 msg.msg_namelen = 0; 801 802 if (from != NULL) 803 m_free(from); 804 805 if (error == 0) { 806 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 807 if (msg.msg_flags < 0) 808 /* Some flag unsupported by Linux */ 809 error = EINVAL; 810 else { 811 ktrkuser("msghdr", &msg, sizeof(msg)); 812 bsd_to_linux_msghdr(&msg, &lmsg); 813 error = copyout(&lmsg, SCARG(uap, msg), sizeof(lmsg)); 814 } 815 } 816 817 return (error); 818 } 819 820 /* 821 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 822 * is different, the rest matches IPPROTO_* on both systems. 823 */ 824 int 825 linux_to_bsd_sopt_level(int llevel) 826 { 827 828 switch (llevel) { 829 case LINUX_SOL_SOCKET: 830 return SOL_SOCKET; 831 case LINUX_SOL_IP: 832 return IPPROTO_IP; 833 #ifdef INET6 834 case LINUX_SOL_IPV6: 835 return IPPROTO_IPV6; 836 #endif 837 case LINUX_SOL_TCP: 838 return IPPROTO_TCP; 839 case LINUX_SOL_UDP: 840 return IPPROTO_UDP; 841 default: 842 return -1; 843 } 844 } 845 846 /* 847 * Convert Linux socket level socket option numbers to NetBSD values. 848 */ 849 int 850 linux_to_bsd_so_sockopt(int lopt) 851 { 852 853 switch (lopt) { 854 case LINUX_SO_DEBUG: 855 return SO_DEBUG; 856 case LINUX_SO_REUSEADDR: 857 /* 858 * Linux does not implement SO_REUSEPORT, but allows reuse of a 859 * host:port pair through SO_REUSEADDR even if the address is not a 860 * multicast-address. Effectively, this means that we should use 861 * SO_REUSEPORT to allow Linux applications to not exit with 862 * EADDRINUSE 863 */ 864 return SO_REUSEPORT; 865 case LINUX_SO_TYPE: 866 return SO_TYPE; 867 case LINUX_SO_ERROR: 868 return SO_ERROR; 869 case LINUX_SO_DONTROUTE: 870 return SO_DONTROUTE; 871 case LINUX_SO_BROADCAST: 872 return SO_BROADCAST; 873 case LINUX_SO_SNDBUF: 874 return SO_SNDBUF; 875 case LINUX_SO_RCVBUF: 876 return SO_RCVBUF; 877 case LINUX_SO_SNDLOWAT: 878 return SO_SNDLOWAT; 879 case LINUX_SO_RCVLOWAT: 880 return SO_RCVLOWAT; 881 case LINUX_SO_KEEPALIVE: 882 return SO_KEEPALIVE; 883 case LINUX_SO_OOBINLINE: 884 return SO_OOBINLINE; 885 case LINUX_SO_LINGER: 886 return SO_LINGER; 887 case LINUX_SO_ACCEPTCONN: 888 return SO_ACCEPTCONN; 889 case LINUX_SO_PRIORITY: 890 case LINUX_SO_NO_CHECK: 891 default: 892 return -1; 893 } 894 } 895 896 /* 897 * Convert Linux IP level socket option number to NetBSD values. 898 */ 899 int 900 linux_to_bsd_ip_sockopt(int lopt) 901 { 902 903 switch (lopt) { 904 case LINUX_IP_TOS: 905 return IP_TOS; 906 case LINUX_IP_TTL: 907 return IP_TTL; 908 case LINUX_IP_HDRINCL: 909 return IP_HDRINCL; 910 case LINUX_IP_MULTICAST_TTL: 911 return IP_MULTICAST_TTL; 912 case LINUX_IP_MULTICAST_LOOP: 913 return IP_MULTICAST_LOOP; 914 case LINUX_IP_MULTICAST_IF: 915 return IP_MULTICAST_IF; 916 case LINUX_IP_ADD_MEMBERSHIP: 917 return IP_ADD_MEMBERSHIP; 918 case LINUX_IP_DROP_MEMBERSHIP: 919 return IP_DROP_MEMBERSHIP; 920 default: 921 return -1; 922 } 923 } 924 925 /* 926 * Convert Linux IPV6 level socket option number to NetBSD values. 927 */ 928 #ifdef INET6 929 int 930 linux_to_bsd_ipv6_sockopt(int lopt) 931 { 932 933 switch (lopt) { 934 case LINUX_IPV6_V6ONLY: 935 return IPV6_V6ONLY; 936 default: 937 return -1; 938 } 939 } 940 #endif 941 942 /* 943 * Convert Linux TCP level socket option number to NetBSD values. 944 */ 945 int 946 linux_to_bsd_tcp_sockopt(int lopt) 947 { 948 949 switch (lopt) { 950 case LINUX_TCP_NODELAY: 951 return TCP_NODELAY; 952 case LINUX_TCP_MAXSEG: 953 return TCP_MAXSEG; 954 default: 955 return -1; 956 } 957 } 958 959 /* 960 * Convert Linux UDP level socket option number to NetBSD values. 961 */ 962 int 963 linux_to_bsd_udp_sockopt(int lopt) 964 { 965 966 switch (lopt) { 967 default: 968 return -1; 969 } 970 } 971 972 /* 973 * Another reasonably straightforward function: setsockopt(2). 974 * The level and option numbers are converted; the values passed 975 * are not (yet) converted, the ones currently implemented don't 976 * need conversion, as they are the same on both systems. 977 */ 978 int 979 linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval) 980 { 981 /* { 982 syscallarg(int) s; 983 syscallarg(int) level; 984 syscallarg(int) optname; 985 syscallarg(void *) optval; 986 syscallarg(int) optlen; 987 } */ 988 struct sys_setsockopt_args bsa; 989 int name; 990 991 SCARG(&bsa, s) = SCARG(uap, s); 992 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 993 SCARG(&bsa, val) = SCARG(uap, optval); 994 SCARG(&bsa, valsize) = SCARG(uap, optlen); 995 996 /* 997 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 998 * and returns EOPNOTSUPP for other levels 999 */ 1000 if (SCARG(&bsa, level) != SOL_SOCKET) { 1001 struct socket *so; 1002 int error, family; 1003 1004 /* fd_getsock() will use the descriptor for us */ 1005 if ((error = fd_getsock(SCARG(&bsa, s), &so)) != 0) 1006 return error; 1007 family = so->so_proto->pr_domain->dom_family; 1008 fd_putfile(SCARG(&bsa, s)); 1009 1010 if (family == AF_LOCAL) 1011 return EOPNOTSUPP; 1012 } 1013 1014 switch (SCARG(&bsa, level)) { 1015 case SOL_SOCKET: 1016 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1017 break; 1018 case IPPROTO_IP: 1019 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1020 break; 1021 #ifdef INET6 1022 case IPPROTO_IPV6: 1023 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1024 break; 1025 #endif 1026 case IPPROTO_TCP: 1027 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1028 break; 1029 case IPPROTO_UDP: 1030 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1031 break; 1032 default: 1033 return EINVAL; 1034 } 1035 1036 if (name == -1) 1037 return EINVAL; 1038 SCARG(&bsa, name) = name; 1039 1040 return sys_setsockopt(l, &bsa, retval); 1041 } 1042 1043 /* 1044 * getsockopt(2) is very much the same as setsockopt(2) (see above) 1045 */ 1046 int 1047 linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval) 1048 { 1049 /* { 1050 syscallarg(int) s; 1051 syscallarg(int) level; 1052 syscallarg(int) optname; 1053 syscallarg(void *) optval; 1054 syscallarg(int *) optlen; 1055 } */ 1056 struct sys_getsockopt_args bga; 1057 int name; 1058 1059 SCARG(&bga, s) = SCARG(uap, s); 1060 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 1061 SCARG(&bga, val) = SCARG(uap, optval); 1062 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 1063 1064 switch (SCARG(&bga, level)) { 1065 case SOL_SOCKET: 1066 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1067 break; 1068 case IPPROTO_IP: 1069 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1070 break; 1071 #ifdef INET6 1072 case IPPROTO_IPV6: 1073 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1074 break; 1075 #endif 1076 case IPPROTO_TCP: 1077 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1078 break; 1079 case IPPROTO_UDP: 1080 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1081 break; 1082 default: 1083 return EINVAL; 1084 } 1085 1086 if (name == -1) 1087 return EINVAL; 1088 SCARG(&bga, name) = name; 1089 1090 return sys_getsockopt(l, &bga, retval); 1091 } 1092 1093 int 1094 linux_getifname(struct lwp *l, register_t *retval, void *data) 1095 { 1096 struct ifnet *ifp; 1097 struct linux_ifreq ifr; 1098 int error; 1099 1100 error = copyin(data, &ifr, sizeof(ifr)); 1101 if (error) 1102 return error; 1103 1104 ifp = if_byindex(ifr.ifr_ifru.ifru_ifindex); 1105 if (ifp == NULL) 1106 return ENODEV; 1107 1108 strncpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 1109 1110 return copyout(&ifr, data, sizeof(ifr)); 1111 } 1112 1113 int 1114 linux_getifconf(struct lwp *l, register_t *retval, void *data) 1115 { 1116 struct linux_ifreq ifr, *ifrp = NULL; 1117 struct linux_ifconf ifc; 1118 struct ifnet *ifp; 1119 struct ifaddr *ifa; 1120 struct sockaddr *sa; 1121 struct osockaddr *osa; 1122 int space = 0, error = 0; 1123 const int sz = (int)sizeof(ifr); 1124 bool docopy; 1125 1126 error = copyin(data, &ifc, sizeof(ifc)); 1127 if (error) 1128 return error; 1129 1130 docopy = ifc.ifc_req != NULL; 1131 if (docopy) { 1132 space = ifc.ifc_len; 1133 ifrp = ifc.ifc_req; 1134 } 1135 1136 IFNET_FOREACH(ifp) { 1137 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1138 sizeof(ifr.ifr_name)); 1139 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1140 return ENAMETOOLONG; 1141 if (IFADDR_EMPTY(ifp)) 1142 continue; 1143 IFADDR_FOREACH(ifa, ifp) { 1144 sa = ifa->ifa_addr; 1145 if (sa->sa_family != AF_INET || 1146 sa->sa_len > sizeof(*osa)) 1147 continue; 1148 memcpy(&ifr.ifr_addr, sa, sa->sa_len); 1149 osa = (struct osockaddr *)&ifr.ifr_addr; 1150 osa->sa_family = sa->sa_family; 1151 if (space >= sz) { 1152 error = copyout(&ifr, ifrp, sz); 1153 if (error != 0) 1154 return error; 1155 ifrp++; 1156 } 1157 space -= sz; 1158 } 1159 } 1160 1161 if (docopy) 1162 ifc.ifc_len -= space; 1163 else 1164 ifc.ifc_len = -space; 1165 1166 return copyout(&ifc, data, sizeof(ifc)); 1167 } 1168 1169 int 1170 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 1171 void *data) 1172 { 1173 /* Not the full structure, just enough to map what we do here */ 1174 struct linux_ifreq lreq; 1175 file_t *fp; 1176 struct ifaddr *ifa; 1177 struct ifnet *ifp; 1178 struct sockaddr_dl *sadl; 1179 int error, found; 1180 int index, ifnum; 1181 1182 /* 1183 * We can't emulate this ioctl by calling sys_ioctl() to run 1184 * SIOCGIFCONF, because the user buffer is not of the right 1185 * type to take those results. We can't use kernel buffers to 1186 * receive the results, as the implementation of sys_ioctl() 1187 * and ifconf() [which implements SIOCGIFCONF] use 1188 * copyin()/copyout() which will fail on kernel addresses. 1189 * 1190 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1191 */ 1192 1193 if ((fp = fd_getfile(fd)) == NULL) 1194 return (EBADF); 1195 1196 KERNEL_LOCK(1, NULL); 1197 1198 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1199 error = EBADF; 1200 goto out; 1201 } 1202 1203 error = copyin(data, &lreq, sizeof(lreq)); 1204 if (error) 1205 goto out; 1206 lreq.ifr_name[LINUX_IFNAMSIZ-1] = '\0'; /* just in case */ 1207 1208 /* 1209 * Try real interface name first, then fake "ethX" 1210 */ 1211 found = 0; 1212 IFNET_FOREACH(ifp) { 1213 if (found) 1214 break; 1215 if (strcmp(lreq.ifr_name, ifp->if_xname)) 1216 /* not this interface */ 1217 continue; 1218 found=1; 1219 if (IFADDR_EMPTY(ifp)) { 1220 error = ENODEV; 1221 goto out; 1222 } 1223 IFADDR_FOREACH(ifa, ifp) { 1224 sadl = satosdl(ifa->ifa_addr); 1225 /* only return ethernet addresses */ 1226 /* XXX what about FDDI, etc. ? */ 1227 if (sadl->sdl_family != AF_LINK || 1228 sadl->sdl_type != IFT_ETHER) 1229 continue; 1230 memcpy(&lreq.ifr_hwaddr.sa_data, CLLADDR(sadl), 1231 MIN(sadl->sdl_alen, 1232 sizeof(lreq.ifr_hwaddr.sa_data))); 1233 lreq.ifr_hwaddr.sa_family = 1234 sadl->sdl_family; 1235 error = copyout(&lreq, data, sizeof(lreq)); 1236 goto out; 1237 } 1238 } 1239 1240 if (strncmp(lreq.ifr_name, "eth", 3) != 0) { 1241 /* unknown interface, not even an "eth*" name */ 1242 error = ENODEV; 1243 goto out; 1244 } 1245 1246 for (ifnum = 0, index = 3; 1247 index < LINUX_IFNAMSIZ && lreq.ifr_name[index] != '\0'; 1248 index++) { 1249 ifnum *= 10; 1250 ifnum += lreq.ifr_name[index] - '0'; 1251 } 1252 1253 error = EINVAL; /* in case we don't find one */ 1254 found = 0; 1255 IFNET_FOREACH(ifp) { 1256 if (found) 1257 break; 1258 memcpy(lreq.ifr_name, ifp->if_xname, 1259 MIN(LINUX_IFNAMSIZ, IFNAMSIZ)); 1260 IFADDR_FOREACH(ifa, ifp) { 1261 sadl = satosdl(ifa->ifa_addr); 1262 /* only return ethernet addresses */ 1263 /* XXX what about FDDI, etc. ? */ 1264 if (sadl->sdl_family != AF_LINK || 1265 sadl->sdl_type != IFT_ETHER) 1266 continue; 1267 if (ifnum--) 1268 /* not the reqested iface */ 1269 continue; 1270 memcpy(&lreq.ifr_hwaddr.sa_data, 1271 CLLADDR(sadl), 1272 MIN(sadl->sdl_alen, 1273 sizeof(lreq.ifr_hwaddr.sa_data))); 1274 lreq.ifr_hwaddr.sa_family = 1275 sadl->sdl_family; 1276 error = copyout(&lreq, data, sizeof(lreq)); 1277 found = 1; 1278 break; 1279 } 1280 } 1281 1282 out: 1283 KERNEL_UNLOCK_ONE(NULL); 1284 fd_putfile(fd); 1285 return error; 1286 } 1287 1288 int 1289 linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) 1290 { 1291 /* { 1292 syscallarg(int) fd; 1293 syscallarg(u_long) com; 1294 syscallarg(void *) data; 1295 } */ 1296 u_long com; 1297 int error = 0, isdev = 0, dosys = 1; 1298 struct sys_ioctl_args ia; 1299 file_t *fp; 1300 struct vnode *vp; 1301 int (*ioctlf)(file_t *, u_long, void *); 1302 struct ioctl_pt pt; 1303 1304 if ((fp = fd_getfile(SCARG(uap, fd))) == NULL) 1305 return (EBADF); 1306 1307 if (fp->f_type == DTYPE_VNODE) { 1308 vp = (struct vnode *)fp->f_data; 1309 isdev = vp->v_type == VCHR; 1310 } 1311 1312 /* 1313 * Don't try to interpret socket ioctl calls that are done 1314 * on a device filedescriptor, just pass them through, to 1315 * emulate Linux behaviour. Use PTIOCLINUX so that the 1316 * device will only handle these if it's prepared to do 1317 * so, to avoid unexpected things from happening. 1318 */ 1319 if (isdev) { 1320 dosys = 0; 1321 ioctlf = fp->f_ops->fo_ioctl; 1322 pt.com = SCARG(uap, com); 1323 pt.data = SCARG(uap, data); 1324 error = ioctlf(fp, PTIOCLINUX, &pt); 1325 /* 1326 * XXX hack: if the function returns EJUSTRETURN, 1327 * it has stuffed a sysctl return value in pt.data. 1328 */ 1329 if (error == EJUSTRETURN) { 1330 retval[0] = (register_t)pt.data; 1331 error = 0; 1332 } 1333 goto out; 1334 } 1335 1336 com = SCARG(uap, com); 1337 retval[0] = 0; 1338 1339 switch (com) { 1340 case LINUX_SIOCGIFNAME: 1341 error = linux_getifname(l, retval, SCARG(uap, data)); 1342 dosys = 0; 1343 break; 1344 case LINUX_SIOCGIFCONF: 1345 error = linux_getifconf(l, retval, SCARG(uap, data)); 1346 dosys = 0; 1347 break; 1348 case LINUX_SIOCGIFFLAGS: 1349 SCARG(&ia, com) = OSIOCGIFFLAGS; 1350 break; 1351 case LINUX_SIOCSIFFLAGS: 1352 SCARG(&ia, com) = OSIOCSIFFLAGS; 1353 break; 1354 case LINUX_SIOCGIFADDR: 1355 SCARG(&ia, com) = OOSIOCGIFADDR; 1356 break; 1357 case LINUX_SIOCGIFDSTADDR: 1358 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1359 break; 1360 case LINUX_SIOCGIFBRDADDR: 1361 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1362 break; 1363 case LINUX_SIOCGIFNETMASK: 1364 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1365 break; 1366 case LINUX_SIOCGIFMTU: 1367 SCARG(&ia, com) = OSIOCGIFMTU; 1368 break; 1369 case LINUX_SIOCADDMULTI: 1370 SCARG(&ia, com) = OSIOCADDMULTI; 1371 break; 1372 case LINUX_SIOCDELMULTI: 1373 SCARG(&ia, com) = OSIOCDELMULTI; 1374 break; 1375 case LINUX_SIOCGIFHWADDR: 1376 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1377 SCARG(uap, data)); 1378 dosys = 0; 1379 break; 1380 default: 1381 error = EINVAL; 1382 } 1383 1384 out: 1385 fd_putfile(SCARG(uap, fd)); 1386 1387 if (error ==0 && dosys) { 1388 SCARG(&ia, fd) = SCARG(uap, fd); 1389 SCARG(&ia, data) = SCARG(uap, data); 1390 error = sys_ioctl(curlwp, &ia, retval); 1391 } 1392 1393 return error; 1394 } 1395 1396 int 1397 linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval) 1398 { 1399 /* { 1400 syscallarg(int) s; 1401 syscallarg(const struct sockaddr *) name; 1402 syscallarg(int) namelen; 1403 } */ 1404 int error; 1405 struct mbuf *nam; 1406 1407 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1408 SCARG(uap, namelen)); 1409 if (error) 1410 return (error); 1411 1412 error = do_sys_connect(l, SCARG(uap, s), nam); 1413 1414 if (error == EISCONN) { 1415 struct socket *so; 1416 int state, prflags; 1417 1418 /* fd_getsock() will use the descriptor for us */ 1419 if (fd_getsock(SCARG(uap, s), &so) != 0) 1420 return EISCONN; 1421 1422 solock(so); 1423 state = so->so_state; 1424 prflags = so->so_proto->pr_flags; 1425 sounlock(so); 1426 fd_putfile(SCARG(uap, s)); 1427 /* 1428 * We should only let this call succeed once per 1429 * non-blocking connect; however we don't have 1430 * a convenient place to keep that state.. 1431 */ 1432 if ((state & (SS_ISCONNECTED|SS_NBIO)) == 1433 (SS_ISCONNECTED|SS_NBIO) && 1434 (prflags & PR_CONNREQUIRED)) 1435 return 0; 1436 } 1437 1438 return (error); 1439 } 1440 1441 int 1442 linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval) 1443 { 1444 /* { 1445 syscallarg(int) s; 1446 syscallarg(const struct osockaddr *) name; 1447 syscallarg(int) namelen; 1448 } */ 1449 int error; 1450 struct sockaddr_big sb; 1451 1452 error = linux_get_sa_sb(l, SCARG(uap, s), &sb, SCARG(uap, name), 1453 SCARG(uap, namelen)); 1454 if (error) 1455 return (error); 1456 1457 return do_sys_bind(l, SCARG(uap, s), (struct sockaddr *)&sb); 1458 } 1459 1460 int 1461 linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval) 1462 { 1463 /* { 1464 syscallarg(int) fdes; 1465 syscallarg(void *) asa; 1466 syscallarg(int *) alen; 1467 } */ 1468 int error; 1469 1470 if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0) 1471 return (error); 1472 1473 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1474 return (error); 1475 1476 return (0); 1477 } 1478 1479 int 1480 linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval) 1481 { 1482 /* { 1483 syscallarg(int) fdes; 1484 syscallarg(void *) asa; 1485 syscallarg(int *) alen; 1486 } */ 1487 int error; 1488 1489 if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0) 1490 return (error); 1491 1492 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1493 return (error); 1494 1495 return (0); 1496 } 1497 1498 static int 1499 linux_get_sa_sb(struct lwp *l, int s, struct sockaddr_big *sb, 1500 const struct osockaddr *name, socklen_t namelen) 1501 { 1502 int error, bdom; 1503 1504 if (namelen > UCHAR_MAX || 1505 namelen <= offsetof(struct sockaddr_big, sb_data)) 1506 return EINVAL; 1507 1508 error = copyin(name, sb, namelen); 1509 if (error) 1510 return error; 1511 1512 bdom = linux_to_bsd_domain(sb->sb_family); 1513 if (bdom == -1) 1514 return EINVAL; 1515 1516 /* 1517 * If the family is unspecified, use address family of the socket. 1518 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1519 */ 1520 if (bdom == AF_UNSPEC) { 1521 struct socket *so; 1522 1523 /* fd_getsock() will use the descriptor for us */ 1524 if ((error = fd_getsock(s, &so)) != 0) 1525 return error; 1526 1527 bdom = so->so_proto->pr_domain->dom_family; 1528 fd_putfile(s); 1529 } 1530 1531 /* 1532 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1533 * which lacks the scope id compared with RFC2553 one. If we detect 1534 * the situation, reject the address and write a message to system log. 1535 * 1536 * Still accept addresses for which the scope id is not used. 1537 */ 1538 if (bdom == AF_INET6 && 1539 namelen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { 1540 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sb; 1541 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1542 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1543 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1544 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1545 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1546 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1547 struct proc *p = l->l_proc; 1548 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1549 1550 log(LOG_DEBUG, 1551 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1552 "sockaddr_in6 rejected", 1553 p->p_pid, p->p_comm, uid); 1554 return EINVAL; 1555 } 1556 namelen = sizeof(struct sockaddr_in6); 1557 sin6->sin6_scope_id = 0; 1558 } 1559 1560 if (bdom == AF_INET) 1561 namelen = sizeof(struct sockaddr_in); 1562 1563 sb->sb_family = bdom; 1564 sb->sb_len = namelen; 1565 ktrkuser("mbsoname", sb, namelen); 1566 return 0; 1567 } 1568 1569 /* 1570 * Copy the osockaddr structure pointed to by osa to mbuf, adjust 1571 * family and convert to sockaddr. 1572 */ 1573 static int 1574 linux_get_sa(struct lwp *l, int s, struct mbuf **mp, 1575 const struct osockaddr *osa, unsigned int salen) 1576 { 1577 int error, bdom; 1578 struct sockaddr *sa; 1579 struct osockaddr *kosa; 1580 struct mbuf *m; 1581 1582 if (salen == 1 || salen > UCHAR_MAX) { 1583 DPRINTF(("bad osa=%p salen=%d\n", osa, salen)); 1584 return EINVAL; 1585 } 1586 1587 /* We'll need the address in an mbuf later, so copy into one here */ 1588 m = m_get(M_WAIT, MT_SONAME); 1589 if (salen > MLEN) 1590 MEXTMALLOC(m, salen, M_WAITOK); 1591 1592 m->m_len = salen; 1593 1594 if (salen == 0) { 1595 *mp = m; 1596 return 0; 1597 } 1598 1599 kosa = mtod(m, void *); 1600 if ((error = copyin(osa, kosa, salen))) { 1601 DPRINTF(("error %d copying osa %p len %d\n", 1602 error, osa, salen)); 1603 goto bad; 1604 } 1605 1606 ktrkuser("linux/sockaddr", kosa, salen); 1607 1608 bdom = linux_to_bsd_domain(kosa->sa_family); 1609 if (bdom == -1) { 1610 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1611 error = EINVAL; 1612 goto bad; 1613 } 1614 1615 /* 1616 * If the family is unspecified, use address family of the socket. 1617 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1618 */ 1619 if (bdom == AF_UNSPEC) { 1620 struct socket *so; 1621 1622 /* fd_getsock() will use the descriptor for us */ 1623 if ((error = fd_getsock(s, &so)) != 0) 1624 goto bad; 1625 1626 bdom = so->so_proto->pr_domain->dom_family; 1627 fd_putfile(s); 1628 1629 DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom)); 1630 } 1631 1632 /* 1633 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1634 * which lacks the scope id compared with RFC2553 one. If we detect 1635 * the situation, reject the address and write a message to system log. 1636 * 1637 * Still accept addresses for which the scope id is not used. 1638 */ 1639 if (bdom == AF_INET6 && salen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1640 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)kosa; 1641 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1642 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1643 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1644 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1645 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1646 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1647 struct proc *p = l->l_proc; 1648 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1649 1650 log(LOG_DEBUG, 1651 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1652 "sockaddr_in6 rejected", 1653 p->p_pid, p->p_comm, uid); 1654 error = EINVAL; 1655 goto bad; 1656 } 1657 salen = sizeof (struct sockaddr_in6); 1658 sin6->sin6_scope_id = 0; 1659 } 1660 1661 if (bdom == AF_INET) 1662 salen = sizeof(struct sockaddr_in); 1663 1664 sa = (struct sockaddr *) kosa; 1665 sa->sa_family = bdom; 1666 sa->sa_len = salen; 1667 m->m_len = salen; 1668 ktrkuser("mbsoname", kosa, salen); 1669 1670 #ifdef DEBUG_LINUX 1671 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1672 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1673 DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom])); 1674 DPRINTF(("\n")); 1675 #endif 1676 1677 *mp = m; 1678 return 0; 1679 1680 bad: 1681 m_free(m); 1682 return error; 1683 } 1684 1685 static int 1686 linux_sa_put(struct osockaddr *osa) 1687 { 1688 struct sockaddr sa; 1689 struct osockaddr *kosa; 1690 int error, bdom, len; 1691 1692 /* 1693 * Only read/write the sockaddr family and length part, the rest is 1694 * not changed. 1695 */ 1696 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1697 1698 error = copyin(osa, &sa, len); 1699 if (error) 1700 return (error); 1701 1702 bdom = bsd_to_linux_domain(sa.sa_family); 1703 if (bdom == -1) 1704 return (EINVAL); 1705 1706 /* Note: we convert from sockaddr to osockaddr here, too */ 1707 kosa = (struct osockaddr *) &sa; 1708 kosa->sa_family = bdom; 1709 error = copyout(kosa, osa, len); 1710 if (error) 1711 return (error); 1712 1713 return (0); 1714 } 1715 1716 #ifndef __amd64__ 1717 int 1718 linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval) 1719 { 1720 /* { 1721 syscallarg(int) s; 1722 syscallarg(void *) buf; 1723 syscallarg(int) len; 1724 syscallarg(int) flags; 1725 } */ 1726 struct sys_recvfrom_args bra; 1727 1728 1729 SCARG(&bra, s) = SCARG(uap, s); 1730 SCARG(&bra, buf) = SCARG(uap, buf); 1731 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1732 SCARG(&bra, flags) = SCARG(uap, flags); 1733 SCARG(&bra, from) = NULL; 1734 SCARG(&bra, fromlenaddr) = NULL; 1735 1736 return (sys_recvfrom(l, &bra, retval)); 1737 } 1738 1739 int 1740 linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval) 1741 { 1742 /* { 1743 syscallarg(int) s; 1744 syscallarg(void *) buf; 1745 syscallarg(int) len; 1746 syscallarg(int) flags; 1747 } */ 1748 struct sys_sendto_args bsa; 1749 1750 SCARG(&bsa, s) = SCARG(uap, s); 1751 SCARG(&bsa, buf) = SCARG(uap, buf); 1752 SCARG(&bsa, len) = SCARG(uap, len); 1753 SCARG(&bsa, flags) = SCARG(uap, flags); 1754 SCARG(&bsa, to) = NULL; 1755 SCARG(&bsa, tolen) = 0; 1756 1757 return (sys_sendto(l, &bsa, retval)); 1758 } 1759 #endif 1760 1761 int 1762 linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval) 1763 { 1764 /* { 1765 syscallarg(int) s; 1766 syscallarg(struct osockaddr *) name; 1767 syscallarg(int *) anamelen; 1768 } */ 1769 int error; 1770 struct sys_accept_args baa; 1771 1772 SCARG(&baa, s) = SCARG(uap, s); 1773 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1774 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1775 1776 if ((error = sys_accept(l, &baa, retval))) 1777 return (error); 1778 1779 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1780 return (error); 1781 1782 return (0); 1783 } 1784