1 /* $NetBSD: linux_socket.c,v 1.109 2011/06/30 20:09:39 wiz 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 1.109 2011/06/30 20:09:39 wiz Exp $"); 39 40 #if defined(_KERNEL_OPT) 41 #include "opt_inet.h" 42 #endif /* defined(_KERNEL_OPT) */ 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/systm.h> 47 #include <sys/buf.h> 48 #include <sys/malloc.h> 49 #include <sys/ioctl.h> 50 #include <sys/tty.h> 51 #include <sys/file.h> 52 #include <sys/filedesc.h> 53 #include <sys/select.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 #include <sys/domain.h> 57 #include <net/if.h> 58 #include <net/if_dl.h> 59 #include <net/if_types.h> 60 #include <netinet/in.h> 61 #include <netinet/tcp.h> 62 #include <sys/mount.h> 63 #include <sys/proc.h> 64 #include <sys/vnode.h> 65 #include <sys/device.h> 66 #include <sys/protosw.h> 67 #include <sys/mbuf.h> 68 #include <sys/syslog.h> 69 #include <sys/exec.h> 70 #include <sys/kauth.h> 71 #include <sys/syscallargs.h> 72 #include <sys/ktrace.h> 73 #include <sys/fcntl.h> 74 75 #include <lib/libkern/libkern.h> 76 77 #include <netinet/ip6.h> 78 #include <netinet6/ip6_var.h> 79 80 #include <compat/sys/socket.h> 81 #include <compat/sys/sockio.h> 82 83 #include <compat/linux/common/linux_types.h> 84 #include <compat/linux/common/linux_util.h> 85 #include <compat/linux/common/linux_signal.h> 86 #include <compat/linux/common/linux_ioctl.h> 87 #include <compat/linux/common/linux_socket.h> 88 #include <compat/linux/common/linux_fcntl.h> 89 #if !defined(__alpha__) && !defined(__amd64__) 90 #include <compat/linux/common/linux_socketcall.h> 91 #endif 92 #include <compat/linux/common/linux_sockio.h> 93 #include <compat/linux/common/linux_ipc.h> 94 #include <compat/linux/common/linux_sem.h> 95 96 #include <compat/linux/linux_syscallargs.h> 97 98 #ifdef DEBUG_LINUX 99 #define DPRINTF(a) uprintf a 100 #else 101 #define DPRINTF(a) 102 #endif 103 104 /* 105 * The calls in this file are entered either via the linux_socketcall() 106 * interface or, on the Alpha, as individual syscalls. The 107 * linux_socketcall function does any massaging of arguments so that all 108 * the calls in here need not think that they are anything other 109 * than a normal syscall. 110 */ 111 112 static int linux_to_bsd_domain(int); 113 static int bsd_to_linux_domain(int); 114 int linux_to_bsd_sopt_level(int); 115 int linux_to_bsd_so_sockopt(int); 116 int linux_to_bsd_ip_sockopt(int); 117 int linux_to_bsd_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_msg_flags(int lflag) 241 { 242 int i, lfl, bfl; 243 int bflag = 0; 244 245 if (lflag == 0) 246 return (0); 247 248 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 249 bfl = bsd_to_linux_msg_flags_[i].bfl; 250 lfl = bsd_to_linux_msg_flags_[i].lfl; 251 252 if (lfl == 0) 253 continue; 254 255 if (lflag & lfl) { 256 if (bfl < 0) 257 return (-1); 258 259 bflag |= bfl; 260 } 261 } 262 263 return (bflag); 264 } 265 266 static int 267 bsd_to_linux_msg_flags(int bflag) 268 { 269 int i, lfl, bfl; 270 int lflag = 0; 271 272 if (bflag == 0) 273 return (0); 274 275 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 276 bfl = bsd_to_linux_msg_flags_[i].bfl; 277 lfl = bsd_to_linux_msg_flags_[i].lfl; 278 279 if (bfl <= 0) 280 continue; 281 282 if (bflag & bfl) { 283 if (lfl < 0) 284 return (-1); 285 286 lflag |= lfl; 287 } 288 } 289 290 return (lflag); 291 } 292 293 int 294 linux_sys_socket(struct lwp *l, const struct linux_sys_socket_args *uap, register_t *retval) 295 { 296 /* { 297 syscallarg(int) domain; 298 syscallarg(int) type; 299 syscallarg(int) protocol; 300 } */ 301 struct sys___socket30_args bsa; 302 struct sys_fcntl_args fsa; 303 register_t fretval[2]; 304 int error, flags; 305 306 307 SCARG(&bsa, protocol) = SCARG(uap, protocol); 308 SCARG(&bsa, type) = SCARG(uap, type) & LINUX_SOCK_TYPE_MASK; 309 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 310 if (SCARG(&bsa, domain) == -1) 311 return EINVAL; 312 flags = SCARG(uap, type) & ~LINUX_SOCK_TYPE_MASK; 313 if (flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 314 return EINVAL; 315 error = sys___socket30(l, &bsa, retval); 316 317 /* 318 * Linux overloads the "type" parameter to include some 319 * fcntl flags to be set on the file descriptor. 320 * Process those if creating the socket succeeded. 321 */ 322 323 if (!error && flags & LINUX_SOCK_CLOEXEC) { 324 SCARG(&fsa, fd) = *retval; 325 SCARG(&fsa, cmd) = F_SETFD; 326 SCARG(&fsa, arg) = (void *)(uintptr_t)FD_CLOEXEC; 327 (void) sys_fcntl(l, &fsa, fretval); 328 } 329 if (!error && flags & LINUX_SOCK_NONBLOCK) { 330 SCARG(&fsa, fd) = *retval; 331 SCARG(&fsa, cmd) = F_SETFL; 332 SCARG(&fsa, arg) = (void *)(uintptr_t)O_NONBLOCK; 333 error = sys_fcntl(l, &fsa, fretval); 334 if (error) { 335 struct sys_close_args csa; 336 337 SCARG(&csa, fd) = *retval; 338 (void) sys_close(l, &csa, fretval); 339 } 340 } 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) = SCARG(uap, type); 381 SCARG(&bsa, protocol) = SCARG(uap, protocol); 382 SCARG(&bsa, rsv) = SCARG(uap, rsv); 383 384 return sys_socketpair(l, &bsa, retval); 385 } 386 387 int 388 linux_sys_sendto(struct lwp *l, const struct linux_sys_sendto_args *uap, register_t *retval) 389 { 390 /* { 391 syscallarg(int) s; 392 syscallarg(void *) msg; 393 syscallarg(int) len; 394 syscallarg(int) flags; 395 syscallarg(struct osockaddr *) to; 396 syscallarg(int) tolen; 397 } */ 398 struct msghdr msg; 399 struct iovec aiov; 400 struct mbuf *nam; 401 int bflags; 402 int error; 403 404 /* Translate message flags. */ 405 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 406 if (bflags < 0) 407 /* Some supported flag */ 408 return EINVAL; 409 410 msg.msg_flags = 0; 411 msg.msg_name = NULL; 412 msg.msg_control = NULL; 413 414 if (SCARG(uap, tolen)) { 415 /* Read in and convert the sockaddr */ 416 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to), 417 SCARG(uap, tolen)); 418 if (error) 419 return (error); 420 msg.msg_flags |= MSG_NAMEMBUF; 421 msg.msg_name = nam; 422 msg.msg_namelen = SCARG(uap, tolen); 423 } 424 425 msg.msg_iov = &aiov; 426 msg.msg_iovlen = 1; 427 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 428 aiov.iov_len = SCARG(uap, len); 429 430 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 431 } 432 433 static void 434 linux_to_bsd_msghdr(struct linux_msghdr *lmsg, struct msghdr *bmsg) 435 { 436 bmsg->msg_name = lmsg->msg_name; 437 bmsg->msg_namelen = lmsg->msg_namelen; 438 bmsg->msg_iov = lmsg->msg_iov; 439 bmsg->msg_iovlen = lmsg->msg_iovlen; 440 bmsg->msg_control = lmsg->msg_control; 441 bmsg->msg_controllen = lmsg->msg_controllen; 442 bmsg->msg_flags = lmsg->msg_flags; 443 } 444 445 static void 446 bsd_to_linux_msghdr(struct msghdr *bmsg, struct linux_msghdr *lmsg) 447 { 448 lmsg->msg_name = bmsg->msg_name; 449 lmsg->msg_namelen = bmsg->msg_namelen; 450 lmsg->msg_iov = bmsg->msg_iov; 451 lmsg->msg_iovlen = bmsg->msg_iovlen; 452 lmsg->msg_control = bmsg->msg_control; 453 lmsg->msg_controllen = bmsg->msg_controllen; 454 lmsg->msg_flags = bmsg->msg_flags; 455 } 456 457 int 458 linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval) 459 { 460 /* { 461 syscallarg(int) s; 462 syscallarg(struct linux_msghdr *) msg; 463 syscallarg(u_int) flags; 464 } */ 465 struct msghdr msg; 466 struct linux_msghdr lmsg; 467 int error; 468 int bflags; 469 struct mbuf *nam; 470 u_int8_t *control; 471 struct mbuf *ctl_mbuf = NULL; 472 473 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 474 if (error) 475 return error; 476 linux_to_bsd_msghdr(&lmsg, &msg); 477 478 msg.msg_flags = MSG_IOVUSRSPACE; 479 480 /* 481 * Translate message flags. 482 */ 483 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 484 if (bflags < 0) 485 /* Some supported flag */ 486 return EINVAL; 487 488 if (lmsg.msg_name) { 489 /* Read in and convert the sockaddr */ 490 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 491 msg.msg_namelen); 492 if (error) 493 return (error); 494 msg.msg_flags |= MSG_NAMEMBUF; 495 msg.msg_name = nam; 496 } 497 498 /* 499 * Handle cmsg if there is any. 500 */ 501 if (LINUX_CMSG_FIRSTHDR(&lmsg)) { 502 struct linux_cmsghdr l_cmsg, *l_cc; 503 struct cmsghdr *cmsg; 504 ssize_t resid = msg.msg_controllen; 505 size_t clen, cidx = 0, cspace; 506 507 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 508 clen = MLEN; 509 control = mtod(ctl_mbuf, void *); 510 511 l_cc = LINUX_CMSG_FIRSTHDR(&lmsg); 512 do { 513 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 514 if (error) 515 goto done; 516 517 /* 518 * Sanity check the control message length. 519 */ 520 if (l_cmsg.cmsg_len > resid 521 || l_cmsg.cmsg_len < sizeof l_cmsg) { 522 error = EINVAL; 523 goto done; 524 } 525 526 /* 527 * Refuse unsupported control messages, and 528 * translate fields as appropriate. 529 */ 530 switch (l_cmsg.cmsg_level) { 531 case LINUX_SOL_SOCKET: 532 /* It only differs on some archs */ 533 if (LINUX_SOL_SOCKET != SOL_SOCKET) 534 l_cmsg.cmsg_level = SOL_SOCKET; 535 536 switch(l_cmsg.cmsg_type) { 537 case LINUX_SCM_RIGHTS: 538 /* Linux SCM_RIGHTS is same as NetBSD */ 539 break; 540 541 case LINUX_SCM_CREDENTIALS: 542 /* no native equivalent, just drop it */ 543 m_free(ctl_mbuf); 544 ctl_mbuf = NULL; 545 msg.msg_control = NULL; 546 msg.msg_controllen = 0; 547 goto skipcmsg; 548 549 default: 550 /* other types not supported */ 551 error = EINVAL; 552 goto done; 553 } 554 break; 555 default: 556 /* pray and leave intact */ 557 break; 558 } 559 560 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 561 562 /* Check the buffer is big enough */ 563 if (__predict_false(cidx + cspace > clen)) { 564 u_int8_t *nc; 565 566 clen = cidx + cspace; 567 if (clen >= PAGE_SIZE) { 568 error = EINVAL; 569 goto done; 570 } 571 nc = realloc(clen <= MLEN ? NULL : control, 572 clen, M_TEMP, M_WAITOK); 573 if (!nc) { 574 error = ENOMEM; 575 goto done; 576 } 577 if (cidx <= MLEN) 578 /* Old buffer was in mbuf... */ 579 memcpy(nc, control, cidx); 580 control = nc; 581 } 582 583 /* Copy header */ 584 cmsg = (void *)&control[cidx]; 585 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 586 cmsg->cmsg_level = l_cmsg.cmsg_level; 587 cmsg->cmsg_type = l_cmsg.cmsg_type; 588 589 /* Zero area between header and data */ 590 memset(cmsg + 1, 0, 591 CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg)); 592 593 /* Copyin the data */ 594 error = copyin(LINUX_CMSG_DATA(l_cc), 595 CMSG_DATA(control), 596 l_cmsg.cmsg_len - sizeof(l_cmsg)); 597 if (error) 598 goto done; 599 600 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 601 cidx += cspace; 602 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 603 604 /* If we allocated a buffer, attach to mbuf */ 605 if (cidx > MLEN) { 606 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 607 ctl_mbuf->m_flags |= M_EXT_RW; 608 } 609 control = NULL; 610 ctl_mbuf->m_len = cidx; 611 612 msg.msg_control = ctl_mbuf; 613 msg.msg_flags |= MSG_CONTROLMBUF; 614 615 ktrkuser("msgcontrol", mtod(ctl_mbuf, void *), 616 msg.msg_controllen); 617 } 618 619 skipcmsg: 620 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 621 /* Freed internally */ 622 ctl_mbuf = NULL; 623 624 done: 625 if (ctl_mbuf != NULL) { 626 if (control != NULL && control != mtod(ctl_mbuf, void *)) 627 free(control, M_MBUF); 628 m_free(ctl_mbuf); 629 } 630 return (error); 631 } 632 633 int 634 linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval) 635 { 636 /* { 637 syscallarg(int) s; 638 syscallarg(void *) buf; 639 syscallarg(int) len; 640 syscallarg(int) flags; 641 syscallarg(struct osockaddr *) from; 642 syscallarg(int *) fromlenaddr; 643 } */ 644 int error; 645 struct sys_recvfrom_args bra; 646 647 SCARG(&bra, s) = SCARG(uap, s); 648 SCARG(&bra, buf) = SCARG(uap, buf); 649 SCARG(&bra, len) = SCARG(uap, len); 650 SCARG(&bra, flags) = SCARG(uap, flags); 651 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 652 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 653 654 if ((error = sys_recvfrom(l, &bra, retval))) 655 return (error); 656 657 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 658 return (error); 659 660 return (0); 661 } 662 663 static int 664 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 665 { 666 int dlen, error = 0; 667 struct cmsghdr *cmsg; 668 struct linux_cmsghdr linux_cmsg; 669 struct mbuf *m; 670 char *q, *q_end; 671 672 if (mp->msg_controllen <= 0 || control == 0) { 673 mp->msg_controllen = 0; 674 free_control_mbuf(l, control, control); 675 return 0; 676 } 677 678 ktrkuser("msgcontrol", mtod(control, void *), mp->msg_controllen); 679 680 q = (char *)mp->msg_control; 681 q_end = q + mp->msg_controllen; 682 683 for (m = control; m != NULL; ) { 684 cmsg = mtod(m, struct cmsghdr *); 685 686 /* 687 * Fixup cmsg. We handle two things: 688 * 0. different sizeof cmsg_len. 689 * 1. different values for level/type on some archs 690 * 2. different alignment of CMSG_DATA on some archs 691 */ 692 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 693 linux_cmsg.cmsg_level = cmsg->cmsg_level; 694 linux_cmsg.cmsg_type = cmsg->cmsg_type; 695 696 dlen = q_end - q; 697 if (linux_cmsg.cmsg_len > dlen) { 698 /* Not enough room for the parameter */ 699 dlen -= sizeof linux_cmsg; 700 if (dlen <= 0) 701 /* Discard if header wont fit */ 702 break; 703 mp->msg_flags |= MSG_CTRUNC; 704 if (linux_cmsg.cmsg_level == SOL_SOCKET 705 && linux_cmsg.cmsg_type == SCM_RIGHTS) 706 /* Do not truncate me ... */ 707 break; 708 } else 709 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 710 711 switch (linux_cmsg.cmsg_level) { 712 case SOL_SOCKET: 713 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 714 switch (linux_cmsg.cmsg_type) { 715 case SCM_RIGHTS: 716 /* Linux SCM_RIGHTS is same as NetBSD */ 717 break; 718 719 default: 720 /* other types not supported */ 721 error = EINVAL; 722 goto done; 723 } 724 /* machine dependent ! */ 725 break; 726 default: 727 /* pray and leave intact */ 728 break; 729 } 730 731 /* There can be padding between the header and data... */ 732 error = copyout(&linux_cmsg, q, sizeof linux_cmsg); 733 if (error != 0) { 734 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 735 dlen); 736 } 737 if (error != 0) { 738 /* We must free all the SCM_RIGHTS */ 739 m = control; 740 break; 741 } 742 m = m->m_next; 743 if (m == NULL || q + LINUX_CMSG_SPACE(dlen) > q_end) { 744 q += LINUX_CMSG_LEN(dlen); 745 break; 746 } 747 q += LINUX_CMSG_SPACE(dlen); 748 } 749 750 done: 751 free_control_mbuf(l, control, m); 752 753 mp->msg_controllen = q - (char *)mp->msg_control; 754 return error; 755 } 756 757 int 758 linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval) 759 { 760 /* { 761 syscallarg(int) s; 762 syscallarg(struct linux_msghdr *) msg; 763 syscallarg(u_int) flags; 764 } */ 765 struct msghdr msg; 766 struct linux_msghdr lmsg; 767 int error; 768 struct mbuf *from, *control; 769 770 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 771 if (error) 772 return (error); 773 linux_to_bsd_msghdr(&lmsg, &msg); 774 775 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 776 if (msg.msg_flags < 0) { 777 /* Some unsupported flag */ 778 return (EINVAL); 779 } 780 msg.msg_flags |= MSG_IOVUSRSPACE; 781 782 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 783 msg.msg_control != NULL ? &control : NULL, retval); 784 if (error != 0) 785 return error; 786 787 if (msg.msg_control != NULL) 788 error = linux_copyout_msg_control(l, &msg, control); 789 790 if (error == 0 && from != 0) { 791 mtod(from, struct osockaddr *)->sa_family = 792 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 793 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 794 from); 795 } else 796 msg.msg_namelen = 0; 797 798 if (from != NULL) 799 m_free(from); 800 801 if (error == 0) { 802 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 803 if (msg.msg_flags < 0) 804 /* Some flag unsupported by Linux */ 805 error = EINVAL; 806 else { 807 ktrkuser("msghdr", &msg, sizeof(msg)); 808 bsd_to_linux_msghdr(&msg, &lmsg); 809 error = copyout(&lmsg, SCARG(uap, msg), sizeof(lmsg)); 810 } 811 } 812 813 return (error); 814 } 815 816 /* 817 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 818 * is different, the rest matches IPPROTO_* on both systems. 819 */ 820 int 821 linux_to_bsd_sopt_level(int llevel) 822 { 823 824 switch (llevel) { 825 case LINUX_SOL_SOCKET: 826 return SOL_SOCKET; 827 case LINUX_SOL_IP: 828 return IPPROTO_IP; 829 case LINUX_SOL_TCP: 830 return IPPROTO_TCP; 831 case LINUX_SOL_UDP: 832 return IPPROTO_UDP; 833 default: 834 return -1; 835 } 836 } 837 838 /* 839 * Convert Linux socket level socket option numbers to NetBSD values. 840 */ 841 int 842 linux_to_bsd_so_sockopt(int lopt) 843 { 844 845 switch (lopt) { 846 case LINUX_SO_DEBUG: 847 return SO_DEBUG; 848 case LINUX_SO_REUSEADDR: 849 /* 850 * Linux does not implement SO_REUSEPORT, but allows reuse of a 851 * host:port pair through SO_REUSEADDR even if the address is not a 852 * multicast-address. Effectively, this means that we should use 853 * SO_REUSEPORT to allow Linux applications to not exit with 854 * EADDRINUSE 855 */ 856 return SO_REUSEPORT; 857 case LINUX_SO_TYPE: 858 return SO_TYPE; 859 case LINUX_SO_ERROR: 860 return SO_ERROR; 861 case LINUX_SO_DONTROUTE: 862 return SO_DONTROUTE; 863 case LINUX_SO_BROADCAST: 864 return SO_BROADCAST; 865 case LINUX_SO_SNDBUF: 866 return SO_SNDBUF; 867 case LINUX_SO_RCVBUF: 868 return SO_RCVBUF; 869 case LINUX_SO_KEEPALIVE: 870 return SO_KEEPALIVE; 871 case LINUX_SO_OOBINLINE: 872 return SO_OOBINLINE; 873 case LINUX_SO_LINGER: 874 return SO_LINGER; 875 case LINUX_SO_PRIORITY: 876 case LINUX_SO_NO_CHECK: 877 default: 878 return -1; 879 } 880 } 881 882 /* 883 * Convert Linux IP level socket option number to NetBSD values. 884 */ 885 int 886 linux_to_bsd_ip_sockopt(int lopt) 887 { 888 889 switch (lopt) { 890 case LINUX_IP_TOS: 891 return IP_TOS; 892 case LINUX_IP_TTL: 893 return IP_TTL; 894 case LINUX_IP_HDRINCL: 895 return IP_HDRINCL; 896 case LINUX_IP_MULTICAST_TTL: 897 return IP_MULTICAST_TTL; 898 case LINUX_IP_MULTICAST_LOOP: 899 return IP_MULTICAST_LOOP; 900 case LINUX_IP_MULTICAST_IF: 901 return IP_MULTICAST_IF; 902 case LINUX_IP_ADD_MEMBERSHIP: 903 return IP_ADD_MEMBERSHIP; 904 case LINUX_IP_DROP_MEMBERSHIP: 905 return IP_DROP_MEMBERSHIP; 906 default: 907 return -1; 908 } 909 } 910 911 /* 912 * Convert Linux TCP level socket option number to NetBSD values. 913 */ 914 int 915 linux_to_bsd_tcp_sockopt(int lopt) 916 { 917 918 switch (lopt) { 919 case LINUX_TCP_NODELAY: 920 return TCP_NODELAY; 921 case LINUX_TCP_MAXSEG: 922 return TCP_MAXSEG; 923 default: 924 return -1; 925 } 926 } 927 928 /* 929 * Convert Linux UDP level socket option number to NetBSD values. 930 */ 931 int 932 linux_to_bsd_udp_sockopt(int lopt) 933 { 934 935 switch (lopt) { 936 default: 937 return -1; 938 } 939 } 940 941 /* 942 * Another reasonably straightforward function: setsockopt(2). 943 * The level and option numbers are converted; the values passed 944 * are not (yet) converted, the ones currently implemented don't 945 * need conversion, as they are the same on both systems. 946 */ 947 int 948 linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval) 949 { 950 /* { 951 syscallarg(int) s; 952 syscallarg(int) level; 953 syscallarg(int) optname; 954 syscallarg(void *) optval; 955 syscallarg(int) optlen; 956 } */ 957 struct sys_setsockopt_args bsa; 958 int name; 959 960 SCARG(&bsa, s) = SCARG(uap, s); 961 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 962 SCARG(&bsa, val) = SCARG(uap, optval); 963 SCARG(&bsa, valsize) = SCARG(uap, optlen); 964 965 /* 966 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 967 * and returns EOPNOTSUPP for other levels 968 */ 969 if (SCARG(&bsa, level) != SOL_SOCKET) { 970 struct socket *so; 971 int error, family; 972 973 /* fd_getsock() will use the descriptor for us */ 974 if ((error = fd_getsock(SCARG(&bsa, s), &so)) != 0) 975 return error; 976 family = so->so_proto->pr_domain->dom_family; 977 fd_putfile(SCARG(&bsa, s)); 978 979 if (family == AF_LOCAL) 980 return EOPNOTSUPP; 981 } 982 983 switch (SCARG(&bsa, level)) { 984 case SOL_SOCKET: 985 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 986 break; 987 case IPPROTO_IP: 988 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 989 break; 990 case IPPROTO_TCP: 991 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 992 break; 993 case IPPROTO_UDP: 994 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 995 break; 996 default: 997 return EINVAL; 998 } 999 1000 if (name == -1) 1001 return EINVAL; 1002 SCARG(&bsa, name) = name; 1003 1004 return sys_setsockopt(l, &bsa, retval); 1005 } 1006 1007 /* 1008 * getsockopt(2) is very much the same as setsockopt(2) (see above) 1009 */ 1010 int 1011 linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval) 1012 { 1013 /* { 1014 syscallarg(int) s; 1015 syscallarg(int) level; 1016 syscallarg(int) optname; 1017 syscallarg(void *) optval; 1018 syscallarg(int *) optlen; 1019 } */ 1020 struct sys_getsockopt_args bga; 1021 int name; 1022 1023 SCARG(&bga, s) = SCARG(uap, s); 1024 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 1025 SCARG(&bga, val) = SCARG(uap, optval); 1026 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 1027 1028 switch (SCARG(&bga, level)) { 1029 case SOL_SOCKET: 1030 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1031 break; 1032 case IPPROTO_IP: 1033 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1034 break; 1035 case IPPROTO_TCP: 1036 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1037 break; 1038 case IPPROTO_UDP: 1039 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1040 break; 1041 default: 1042 return EINVAL; 1043 } 1044 1045 if (name == -1) 1046 return EINVAL; 1047 SCARG(&bga, name) = name; 1048 1049 return sys_getsockopt(l, &bga, retval); 1050 } 1051 1052 int 1053 linux_getifname(struct lwp *l, register_t *retval, void *data) 1054 { 1055 struct ifnet *ifp; 1056 struct linux_ifreq ifr; 1057 int error; 1058 1059 error = copyin(data, &ifr, sizeof(ifr)); 1060 if (error) 1061 return error; 1062 1063 if (ifr.ifr_ifru.ifru_ifindex >= if_indexlim) 1064 return ENODEV; 1065 1066 ifp = ifindex2ifnet[ifr.ifr_ifru.ifru_ifindex]; 1067 if (ifp == NULL) 1068 return ENODEV; 1069 1070 strncpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 1071 1072 return copyout(&ifr, data, sizeof(ifr)); 1073 } 1074 1075 int 1076 linux_getifconf(struct lwp *l, register_t *retval, void *data) 1077 { 1078 struct linux_ifreq ifr, *ifrp; 1079 struct ifconf *ifc = data; 1080 struct ifnet *ifp; 1081 struct ifaddr *ifa; 1082 struct sockaddr *sa; 1083 struct osockaddr *osa; 1084 int space, error = 0; 1085 const int sz = (int)sizeof(ifr); 1086 1087 ifrp = (struct linux_ifreq *)ifc->ifc_req; 1088 if (ifrp == NULL) 1089 space = 0; 1090 else 1091 space = ifc->ifc_len; 1092 1093 IFNET_FOREACH(ifp) { 1094 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1095 sizeof(ifr.ifr_name)); 1096 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') 1097 return ENAMETOOLONG; 1098 if (IFADDR_EMPTY(ifp)) 1099 continue; 1100 IFADDR_FOREACH(ifa, ifp) { 1101 sa = ifa->ifa_addr; 1102 if (sa->sa_family != AF_INET || 1103 sa->sa_len > sizeof(*osa)) 1104 continue; 1105 memcpy(&ifr.ifr_addr, sa, sa->sa_len); 1106 osa = (struct osockaddr *)&ifr.ifr_addr; 1107 osa->sa_family = sa->sa_family; 1108 if (space >= sz) { 1109 error = copyout(&ifr, ifrp, sz); 1110 if (error != 0) 1111 return error; 1112 ifrp++; 1113 } 1114 space -= sz; 1115 } 1116 } 1117 1118 if (ifrp != NULL) 1119 ifc->ifc_len -= space; 1120 else 1121 ifc->ifc_len = -space; 1122 1123 return 0; 1124 } 1125 1126 int 1127 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 1128 void *data) 1129 { 1130 /* Not the full structure, just enough to map what we do here */ 1131 struct linux_ifreq lreq; 1132 file_t *fp; 1133 struct ifaddr *ifa; 1134 struct ifnet *ifp; 1135 struct sockaddr_dl *sadl; 1136 int error, found; 1137 int index, ifnum; 1138 1139 /* 1140 * We can't emulate this ioctl by calling sys_ioctl() to run 1141 * SIOCGIFCONF, because the user buffer is not of the right 1142 * type to take those results. We can't use kernel buffers to 1143 * receive the results, as the implementation of sys_ioctl() 1144 * and ifconf() [which implements SIOCGIFCONF] use 1145 * copyin()/copyout() which will fail on kernel addresses. 1146 * 1147 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1148 */ 1149 1150 if ((fp = fd_getfile(fd)) == NULL) 1151 return (EBADF); 1152 1153 KERNEL_LOCK(1, NULL); 1154 1155 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1156 error = EBADF; 1157 goto out; 1158 } 1159 1160 error = copyin(data, &lreq, sizeof(lreq)); 1161 if (error) 1162 goto out; 1163 lreq.ifr_name[LINUX_IFNAMSIZ-1] = '\0'; /* just in case */ 1164 1165 /* 1166 * Try real interface name first, then fake "ethX" 1167 */ 1168 found = 0; 1169 IFNET_FOREACH(ifp) { 1170 if (found) 1171 break; 1172 if (strcmp(lreq.ifr_name, ifp->if_xname)) 1173 /* not this interface */ 1174 continue; 1175 found=1; 1176 if (IFADDR_EMPTY(ifp)) { 1177 error = ENODEV; 1178 goto out; 1179 } 1180 IFADDR_FOREACH(ifa, ifp) { 1181 sadl = satosdl(ifa->ifa_addr); 1182 /* only return ethernet addresses */ 1183 /* XXX what about FDDI, etc. ? */ 1184 if (sadl->sdl_family != AF_LINK || 1185 sadl->sdl_type != IFT_ETHER) 1186 continue; 1187 memcpy(&lreq.ifr_hwaddr.sa_data, CLLADDR(sadl), 1188 MIN(sadl->sdl_alen, 1189 sizeof(lreq.ifr_hwaddr.sa_data))); 1190 lreq.ifr_hwaddr.sa_family = 1191 sadl->sdl_family; 1192 error = copyout(&lreq, data, sizeof(lreq)); 1193 goto out; 1194 } 1195 } 1196 1197 if (strncmp(lreq.ifr_name, "eth", 3) == 0) { 1198 for (ifnum = 0, index = 3; 1199 lreq.ifr_name[index] != '\0' && index < LINUX_IFNAMSIZ; 1200 index++) { 1201 ifnum *= 10; 1202 ifnum += lreq.ifr_name[index] - '0'; 1203 } 1204 1205 error = EINVAL; /* in case we don't find one */ 1206 found = 0; 1207 IFNET_FOREACH(ifp) { 1208 if (found) 1209 break; 1210 memcpy(lreq.ifr_name, ifp->if_xname, 1211 MIN(LINUX_IFNAMSIZ, IFNAMSIZ)); 1212 IFADDR_FOREACH(ifa, ifp) { 1213 sadl = satosdl(ifa->ifa_addr); 1214 /* only return ethernet addresses */ 1215 /* XXX what about FDDI, etc. ? */ 1216 if (sadl->sdl_family != AF_LINK || 1217 sadl->sdl_type != IFT_ETHER) 1218 continue; 1219 if (ifnum--) 1220 /* not the reqested iface */ 1221 continue; 1222 memcpy(&lreq.ifr_hwaddr.sa_data, 1223 CLLADDR(sadl), 1224 MIN(sadl->sdl_alen, 1225 sizeof(lreq.ifr_hwaddr.sa_data))); 1226 lreq.ifr_hwaddr.sa_family = 1227 sadl->sdl_family; 1228 error = copyout(&lreq, data, sizeof(lreq)); 1229 found = 1; 1230 break; 1231 } 1232 } 1233 } else { 1234 /* unknown interface, not even an "eth*" name */ 1235 error = ENODEV; 1236 } 1237 1238 out: 1239 KERNEL_UNLOCK_ONE(NULL); 1240 fd_putfile(fd); 1241 return error; 1242 } 1243 1244 int 1245 linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) 1246 { 1247 /* { 1248 syscallarg(int) fd; 1249 syscallarg(u_long) com; 1250 syscallarg(void *) data; 1251 } */ 1252 u_long com; 1253 int error = 0, isdev = 0, dosys = 1; 1254 struct sys_ioctl_args ia; 1255 file_t *fp; 1256 struct vnode *vp; 1257 int (*ioctlf)(file_t *, u_long, void *); 1258 struct ioctl_pt pt; 1259 1260 if ((fp = fd_getfile(SCARG(uap, fd))) == NULL) 1261 return (EBADF); 1262 1263 if (fp->f_type == DTYPE_VNODE) { 1264 vp = (struct vnode *)fp->f_data; 1265 isdev = vp->v_type == VCHR; 1266 } 1267 1268 /* 1269 * Don't try to interpret socket ioctl calls that are done 1270 * on a device filedescriptor, just pass them through, to 1271 * emulate Linux behaviour. Use PTIOCLINUX so that the 1272 * device will only handle these if it's prepared to do 1273 * so, to avoid unexpected things from happening. 1274 */ 1275 if (isdev) { 1276 dosys = 0; 1277 ioctlf = fp->f_ops->fo_ioctl; 1278 pt.com = SCARG(uap, com); 1279 pt.data = SCARG(uap, data); 1280 error = ioctlf(fp, PTIOCLINUX, &pt); 1281 /* 1282 * XXX hack: if the function returns EJUSTRETURN, 1283 * it has stuffed a sysctl return value in pt.data. 1284 */ 1285 if (error == EJUSTRETURN) { 1286 retval[0] = (register_t)pt.data; 1287 error = 0; 1288 } 1289 goto out; 1290 } 1291 1292 com = SCARG(uap, com); 1293 retval[0] = 0; 1294 1295 switch (com) { 1296 case LINUX_SIOCGIFNAME: 1297 error = linux_getifname(l, retval, SCARG(uap, data)); 1298 dosys = 0; 1299 break; 1300 case LINUX_SIOCGIFCONF: 1301 error = linux_getifconf(l, retval, SCARG(uap, data)); 1302 dosys = 0; 1303 break; 1304 case LINUX_SIOCGIFFLAGS: 1305 SCARG(&ia, com) = OSIOCGIFFLAGS; 1306 break; 1307 case LINUX_SIOCSIFFLAGS: 1308 SCARG(&ia, com) = OSIOCSIFFLAGS; 1309 break; 1310 case LINUX_SIOCGIFADDR: 1311 SCARG(&ia, com) = OOSIOCGIFADDR; 1312 break; 1313 case LINUX_SIOCGIFDSTADDR: 1314 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1315 break; 1316 case LINUX_SIOCGIFBRDADDR: 1317 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1318 break; 1319 case LINUX_SIOCGIFNETMASK: 1320 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1321 break; 1322 case LINUX_SIOCGIFMTU: 1323 SCARG(&ia, com) = OSIOCGIFMTU; 1324 break; 1325 case LINUX_SIOCADDMULTI: 1326 SCARG(&ia, com) = OSIOCADDMULTI; 1327 break; 1328 case LINUX_SIOCDELMULTI: 1329 SCARG(&ia, com) = OSIOCDELMULTI; 1330 break; 1331 case LINUX_SIOCGIFHWADDR: 1332 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1333 SCARG(uap, data)); 1334 dosys = 0; 1335 break; 1336 default: 1337 error = EINVAL; 1338 } 1339 1340 out: 1341 fd_putfile(SCARG(uap, fd)); 1342 1343 if (error ==0 && dosys) { 1344 SCARG(&ia, fd) = SCARG(uap, fd); 1345 SCARG(&ia, data) = SCARG(uap, data); 1346 error = sys_ioctl(curlwp, &ia, retval); 1347 } 1348 1349 return error; 1350 } 1351 1352 int 1353 linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval) 1354 { 1355 /* { 1356 syscallarg(int) s; 1357 syscallarg(const struct sockaddr *) name; 1358 syscallarg(int) namelen; 1359 } */ 1360 int error; 1361 struct mbuf *nam; 1362 1363 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1364 SCARG(uap, namelen)); 1365 if (error) 1366 return (error); 1367 1368 error = do_sys_connect(l, SCARG(uap, s), nam); 1369 1370 if (error == EISCONN) { 1371 struct socket *so; 1372 int state, prflags, nbio; 1373 1374 /* fd_getsock() will use the descriptor for us */ 1375 if (fd_getsock(SCARG(uap, s), &so) != 0) 1376 return EISCONN; 1377 1378 solock(so); 1379 state = so->so_state; 1380 nbio = so->so_nbio; 1381 prflags = so->so_proto->pr_flags; 1382 sounlock(so); 1383 fd_putfile(SCARG(uap, s)); 1384 /* 1385 * We should only let this call succeed once per 1386 * non-blocking connect; however we don't have 1387 * a convenient place to keep that state.. 1388 */ 1389 if (nbio && (state & SS_ISCONNECTED) && 1390 (prflags & PR_CONNREQUIRED)) 1391 return 0; 1392 } 1393 1394 return (error); 1395 } 1396 1397 int 1398 linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval) 1399 { 1400 /* { 1401 syscallarg(int) s; 1402 syscallarg(const struct osockaddr *) name; 1403 syscallarg(int) namelen; 1404 } */ 1405 int error; 1406 struct mbuf *nam; 1407 1408 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1409 SCARG(uap, namelen)); 1410 if (error) 1411 return (error); 1412 1413 return do_sys_bind(l, SCARG(uap, s), nam); 1414 } 1415 1416 int 1417 linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval) 1418 { 1419 /* { 1420 syscallarg(int) fdes; 1421 syscallarg(void *) asa; 1422 syscallarg(int *) alen; 1423 } */ 1424 int error; 1425 1426 if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0) 1427 return (error); 1428 1429 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1430 return (error); 1431 1432 return (0); 1433 } 1434 1435 int 1436 linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval) 1437 { 1438 /* { 1439 syscallarg(int) fdes; 1440 syscallarg(void *) asa; 1441 syscallarg(int *) alen; 1442 } */ 1443 int error; 1444 1445 if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0) 1446 return (error); 1447 1448 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1449 return (error); 1450 1451 return (0); 1452 } 1453 1454 /* 1455 * Copy the osockaddr structure pointed to by osa to mbuf, adjust 1456 * family and convert to sockaddr. 1457 */ 1458 static int 1459 linux_get_sa(struct lwp *l, int s, struct mbuf **mp, 1460 const struct osockaddr *osa, unsigned int salen) 1461 { 1462 int error, bdom; 1463 struct sockaddr *sa; 1464 struct osockaddr *kosa; 1465 struct mbuf *m; 1466 1467 if (salen == 1 || salen > UCHAR_MAX) { 1468 DPRINTF(("bad osa=%p salen=%d\n", osa, salen)); 1469 return EINVAL; 1470 } 1471 1472 /* We'll need the address in an mbuf later, so copy into one here */ 1473 m = m_get(M_WAIT, MT_SONAME); 1474 if (salen > MLEN) 1475 MEXTMALLOC(m, salen, M_WAITOK); 1476 1477 m->m_len = salen; 1478 1479 if (salen == 0) { 1480 *mp = m; 1481 return 0; 1482 } 1483 1484 kosa = mtod(m, void *); 1485 if ((error = copyin(osa, kosa, salen))) { 1486 DPRINTF(("error %d copying osa %p len %d\n", 1487 error, osa, salen)); 1488 goto bad; 1489 } 1490 1491 ktrkuser("linux sockaddr", kosa, salen); 1492 1493 bdom = linux_to_bsd_domain(kosa->sa_family); 1494 if (bdom == -1) { 1495 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1496 error = EINVAL; 1497 goto bad; 1498 } 1499 1500 /* 1501 * If the family is unspecified, use address family of the socket. 1502 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1503 */ 1504 if (bdom == AF_UNSPEC) { 1505 struct socket *so; 1506 1507 /* fd_getsock() will use the descriptor for us */ 1508 if ((error = fd_getsock(s, &so)) != 0) 1509 goto bad; 1510 1511 bdom = so->so_proto->pr_domain->dom_family; 1512 fd_putfile(s); 1513 1514 DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom)); 1515 } 1516 1517 /* 1518 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1519 * which lacks the scope id compared with RFC2553 one. If we detect 1520 * the situation, reject the address and write a message to system log. 1521 * 1522 * Still accept addresses for which the scope id is not used. 1523 */ 1524 if (bdom == AF_INET6 && salen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1525 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)kosa; 1526 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1527 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1528 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1529 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1530 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1531 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1532 struct proc *p = l->l_proc; 1533 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1534 1535 log(LOG_DEBUG, 1536 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1537 "sockaddr_in6 rejected", 1538 p->p_pid, p->p_comm, uid); 1539 error = EINVAL; 1540 goto bad; 1541 } 1542 salen = sizeof (struct sockaddr_in6); 1543 sin6->sin6_scope_id = 0; 1544 } 1545 1546 if (bdom == AF_INET) 1547 salen = sizeof(struct sockaddr_in); 1548 1549 sa = (struct sockaddr *) kosa; 1550 sa->sa_family = bdom; 1551 sa->sa_len = salen; 1552 m->m_len = salen; 1553 ktrkuser("new sockaddr", kosa, salen); 1554 1555 #ifdef DEBUG_LINUX 1556 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1557 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1558 DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom])); 1559 DPRINTF(("\n")); 1560 #endif 1561 1562 *mp = m; 1563 return 0; 1564 1565 bad: 1566 m_free(m); 1567 return error; 1568 } 1569 1570 static int 1571 linux_sa_put(struct osockaddr *osa) 1572 { 1573 struct sockaddr sa; 1574 struct osockaddr *kosa; 1575 int error, bdom, len; 1576 1577 /* 1578 * Only read/write the sockaddr family and length part, the rest is 1579 * not changed. 1580 */ 1581 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1582 1583 error = copyin(osa, &sa, len); 1584 if (error) 1585 return (error); 1586 1587 bdom = bsd_to_linux_domain(sa.sa_family); 1588 if (bdom == -1) 1589 return (EINVAL); 1590 1591 /* Note: we convert from sockaddr to osockaddr here, too */ 1592 kosa = (struct osockaddr *) &sa; 1593 kosa->sa_family = bdom; 1594 error = copyout(kosa, osa, len); 1595 if (error) 1596 return (error); 1597 1598 return (0); 1599 } 1600 1601 #ifndef __amd64__ 1602 int 1603 linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval) 1604 { 1605 /* { 1606 syscallarg(int) s; 1607 syscallarg(void *) buf; 1608 syscallarg(int) len; 1609 syscallarg(int) flags; 1610 } */ 1611 struct sys_recvfrom_args bra; 1612 1613 1614 SCARG(&bra, s) = SCARG(uap, s); 1615 SCARG(&bra, buf) = SCARG(uap, buf); 1616 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1617 SCARG(&bra, flags) = SCARG(uap, flags); 1618 SCARG(&bra, from) = NULL; 1619 SCARG(&bra, fromlenaddr) = NULL; 1620 1621 return (sys_recvfrom(l, &bra, retval)); 1622 } 1623 1624 int 1625 linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval) 1626 { 1627 /* { 1628 syscallarg(int) s; 1629 syscallarg(void *) buf; 1630 syscallarg(int) len; 1631 syscallarg(int) flags; 1632 } */ 1633 struct sys_sendto_args bsa; 1634 1635 SCARG(&bsa, s) = SCARG(uap, s); 1636 SCARG(&bsa, buf) = SCARG(uap, buf); 1637 SCARG(&bsa, len) = SCARG(uap, len); 1638 SCARG(&bsa, flags) = SCARG(uap, flags); 1639 SCARG(&bsa, to) = NULL; 1640 SCARG(&bsa, tolen) = 0; 1641 1642 return (sys_sendto(l, &bsa, retval)); 1643 } 1644 #endif 1645 1646 int 1647 linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval) 1648 { 1649 /* { 1650 syscallarg(int) s; 1651 syscallarg(struct osockaddr *) name; 1652 syscallarg(int *) anamelen; 1653 } */ 1654 int error; 1655 struct sys_accept_args baa; 1656 1657 SCARG(&baa, s) = SCARG(uap, s); 1658 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1659 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1660 1661 if ((error = sys_accept(l, &baa, retval))) 1662 return (error); 1663 1664 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1665 return (error); 1666 1667 return (0); 1668 } 1669