1 /* $NetBSD: linux_socket.c,v 1.145 2019/04/18 17:45:12 christos 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 1.145 2019/04/18 17:45:12 christos 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_sched.h> 86 #include <compat/linux/common/linux_socket.h> 87 #include <compat/linux/common/linux_fcntl.h> 88 #if !defined(__alpha__) && !defined(__amd64__) 89 #include <compat/linux/common/linux_socketcall.h> 90 #endif 91 #include <compat/linux/common/linux_sockio.h> 92 #include <compat/linux/common/linux_ipc.h> 93 #include <compat/linux/common/linux_sem.h> 94 95 #include <compat/linux/linux_syscallargs.h> 96 97 #ifdef DEBUG_LINUX 98 #define DPRINTF(a) uprintf a 99 #else 100 #define DPRINTF(a) 101 #endif 102 103 /* 104 * The calls in this file are entered either via the linux_socketcall() 105 * interface or, on the Alpha, as individual syscalls. The 106 * linux_socketcall function does any massaging of arguments so that all 107 * the calls in here need not think that they are anything other 108 * than a normal syscall. 109 */ 110 111 static int linux_to_bsd_domain(int); 112 static int bsd_to_linux_domain(int); 113 static int linux_to_bsd_type(int); 114 int linux_to_bsd_sopt_level(int); 115 int linux_to_bsd_so_sockopt(int); 116 int linux_to_bsd_ip_sockopt(int); 117 int linux_to_bsd_ipv6_sockopt(int); 118 int linux_to_bsd_tcp_sockopt(int); 119 int linux_to_bsd_udp_sockopt(int); 120 int linux_getifname(struct lwp *, register_t *, void *); 121 int linux_getifconf(struct lwp *, register_t *, void *); 122 int linux_getifhwaddr(struct lwp *, register_t *, u_int, void *); 123 static int linux_get_sa(struct lwp *, int, struct sockaddr_big *, 124 const struct osockaddr *, socklen_t); 125 static int linux_sa_put(struct osockaddr *osa); 126 static int linux_to_bsd_msg_flags(int); 127 static int bsd_to_linux_msg_flags(int); 128 static void linux_to_bsd_msghdr(const struct linux_msghdr *, struct msghdr *); 129 static void bsd_to_linux_msghdr(const struct msghdr *, struct linux_msghdr *); 130 131 static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { 132 AF_UNSPEC, 133 AF_UNIX, 134 AF_INET, 135 AF_CCITT, /* LINUX_AF_AX25 */ 136 AF_IPX, 137 AF_APPLETALK, 138 -1, /* LINUX_AF_NETROM */ 139 -1, /* LINUX_AF_BRIDGE */ 140 -1, /* LINUX_AF_ATMPVC */ 141 AF_CCITT, /* LINUX_AF_X25 */ 142 AF_INET6, 143 -1, /* LINUX_AF_ROSE */ 144 AF_DECnet, 145 -1, /* LINUX_AF_NETBEUI */ 146 -1, /* LINUX_AF_SECURITY */ 147 pseudo_AF_KEY, 148 AF_ROUTE, /* LINUX_AF_NETLINK */ 149 -1, /* LINUX_AF_PACKET */ 150 -1, /* LINUX_AF_ASH */ 151 -1, /* LINUX_AF_ECONET */ 152 -1, /* LINUX_AF_ATMSVC */ 153 AF_SNA, 154 /* rest up to LINUX_AF_MAX-1 is not allocated */ 155 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 156 }; 157 158 static const int bsd_to_linux_domain_[AF_MAX] = { 159 LINUX_AF_UNSPEC, 160 LINUX_AF_UNIX, 161 LINUX_AF_INET, 162 -1, /* AF_IMPLINK */ 163 -1, /* AF_PUP */ 164 -1, /* AF_CHAOS */ 165 -1, /* AF_NS */ 166 -1, /* AF_ISO */ 167 -1, /* AF_ECMA */ 168 -1, /* AF_DATAKIT */ 169 LINUX_AF_AX25, /* AF_CCITT */ 170 LINUX_AF_SNA, 171 LINUX_AF_DECnet, 172 -1, /* AF_DLI */ 173 -1, /* AF_LAT */ 174 -1, /* AF_HYLINK */ 175 LINUX_AF_APPLETALK, 176 LINUX_AF_NETLINK, 177 -1, /* AF_LINK */ 178 -1, /* AF_XTP */ 179 -1, /* AF_COIP */ 180 -1, /* AF_CNT */ 181 -1, /* pseudo_AF_RTIP */ 182 LINUX_AF_IPX, 183 LINUX_AF_INET6, 184 -1, /* pseudo_AF_PIP */ 185 -1, /* AF_ISDN */ 186 -1, /* AF_NATM */ 187 -1, /* AF_ARP */ 188 LINUX_pseudo_AF_KEY, 189 -1, /* pseudo_AF_HDRCMPLT */ 190 }; 191 192 static const struct { 193 int bfl; 194 int lfl; 195 } bsd_to_linux_msg_flags_[] = { 196 {MSG_OOB, LINUX_MSG_OOB}, 197 {MSG_PEEK, LINUX_MSG_PEEK}, 198 {MSG_DONTROUTE, LINUX_MSG_DONTROUTE}, 199 {MSG_EOR, LINUX_MSG_EOR}, 200 {MSG_TRUNC, LINUX_MSG_TRUNC}, 201 {MSG_CTRUNC, LINUX_MSG_CTRUNC}, 202 {MSG_WAITALL, LINUX_MSG_WAITALL}, 203 {MSG_DONTWAIT, LINUX_MSG_DONTWAIT}, 204 {MSG_BCAST, 0}, /* not supported, clear */ 205 {MSG_MCAST, 0}, /* not supported, clear */ 206 {MSG_NOSIGNAL, LINUX_MSG_NOSIGNAL}, 207 {-1, /* not supp */ LINUX_MSG_PROBE}, 208 {-1, /* not supp */ LINUX_MSG_FIN}, 209 {-1, /* not supp */ LINUX_MSG_SYN}, 210 {-1, /* not supp */ LINUX_MSG_CONFIRM}, 211 {-1, /* not supp */ LINUX_MSG_RST}, 212 {-1, /* not supp */ LINUX_MSG_ERRQUEUE}, 213 {-1, /* not supp */ LINUX_MSG_MORE}, 214 }; 215 216 /* 217 * Convert between Linux and BSD socket domain values 218 */ 219 static int 220 linux_to_bsd_domain(int ldom) 221 { 222 if (ldom < 0 || ldom >= LINUX_AF_MAX) 223 return (-1); 224 225 return linux_to_bsd_domain_[ldom]; 226 } 227 228 /* 229 * Convert between BSD and Linux socket domain values 230 */ 231 static int 232 bsd_to_linux_domain(int bdom) 233 { 234 if (bdom < 0 || bdom >= AF_MAX) 235 return (-1); 236 237 return bsd_to_linux_domain_[bdom]; 238 } 239 240 static int 241 linux_to_bsd_type(int ltype) 242 { 243 int type, flags; 244 245 /* Real types are identical between Linux and NetBSD */ 246 type = ltype & LINUX_SOCK_TYPE_MASK; 247 248 /* But flags are not .. */ 249 flags = ltype & ~LINUX_SOCK_TYPE_MASK; 250 if (flags & ~(LINUX_SOCK_CLOEXEC|LINUX_SOCK_NONBLOCK)) 251 return -1; 252 253 if (flags & LINUX_SOCK_CLOEXEC) 254 type |= SOCK_CLOEXEC; 255 if (flags & LINUX_SOCK_NONBLOCK) 256 type |= SOCK_NONBLOCK; 257 258 return type; 259 } 260 261 static int 262 linux_to_bsd_msg_flags(int lflag) 263 { 264 int i, lfl, bfl; 265 int bflag = 0; 266 267 if (lflag == 0) 268 return (0); 269 270 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 271 bfl = bsd_to_linux_msg_flags_[i].bfl; 272 lfl = bsd_to_linux_msg_flags_[i].lfl; 273 274 if (lfl == 0) 275 continue; 276 277 if (lflag & lfl) { 278 if (bfl < 0) 279 return (-1); 280 281 bflag |= bfl; 282 } 283 } 284 285 return (bflag); 286 } 287 288 static int 289 bsd_to_linux_msg_flags(int bflag) 290 { 291 int i, lfl, bfl; 292 int lflag = 0; 293 294 if (bflag == 0) 295 return (0); 296 297 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 298 bfl = bsd_to_linux_msg_flags_[i].bfl; 299 lfl = bsd_to_linux_msg_flags_[i].lfl; 300 301 if (bfl <= 0) 302 continue; 303 304 if (bflag & bfl) { 305 if (lfl < 0) 306 return (-1); 307 308 lflag |= lfl; 309 } 310 } 311 312 return (lflag); 313 } 314 315 int 316 linux_sys_socket(struct lwp *l, const struct linux_sys_socket_args *uap, register_t *retval) 317 { 318 /* { 319 syscallarg(int) domain; 320 syscallarg(int) type; 321 syscallarg(int) protocol; 322 } */ 323 struct sys___socket30_args bsa; 324 int error; 325 326 327 SCARG(&bsa, protocol) = SCARG(uap, protocol); 328 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 329 if (SCARG(&bsa, domain) == -1) 330 return EINVAL; 331 SCARG(&bsa, type) = linux_to_bsd_type(SCARG(uap, type)); 332 if (SCARG(&bsa, type) == -1) 333 return EINVAL; 334 /* 335 * Apparently linux uses this to talk to ISDN sockets. If we fail 336 * now programs seems to handle it, but if we don't we are going 337 * to fail when we bind and programs don't handle this well. 338 */ 339 if (SCARG(&bsa, domain) == AF_ROUTE && SCARG(&bsa, type) == SOCK_RAW) 340 return ENOTSUP; 341 error = sys___socket30(l, &bsa, retval); 342 343 #ifdef INET6 344 /* 345 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 346 * default and some apps depend on this. So, set V6ONLY to 0 347 * for Linux apps if the sysctl value is set to 1. 348 */ 349 if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { 350 struct socket *so; 351 352 if (fd_getsock(*retval, &so) == 0) { 353 int val = 0; 354 355 /* ignore error */ 356 (void)so_setsockopt(l, so, IPPROTO_IPV6, IPV6_V6ONLY, 357 &val, sizeof(val)); 358 359 fd_putfile(*retval); 360 } 361 } 362 #endif 363 364 return (error); 365 } 366 367 int 368 linux_sys_socketpair(struct lwp *l, const struct linux_sys_socketpair_args *uap, register_t *retval) 369 { 370 /* { 371 syscallarg(int) domain; 372 syscallarg(int) type; 373 syscallarg(int) protocol; 374 syscallarg(int *) rsv; 375 } */ 376 struct sys_socketpair_args bsa; 377 378 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 379 if (SCARG(&bsa, domain) == -1) 380 return EINVAL; 381 SCARG(&bsa, type) = linux_to_bsd_type(SCARG(uap, type)); 382 if (SCARG(&bsa, type) == -1) 383 return EINVAL; 384 SCARG(&bsa, protocol) = SCARG(uap, protocol); 385 SCARG(&bsa, rsv) = SCARG(uap, rsv); 386 387 return sys_socketpair(l, &bsa, retval); 388 } 389 390 int 391 linux_sys_sendto(struct lwp *l, const struct linux_sys_sendto_args *uap, register_t *retval) 392 { 393 /* { 394 syscallarg(int) s; 395 syscallarg(void *) msg; 396 syscallarg(int) len; 397 syscallarg(int) flags; 398 syscallarg(struct osockaddr *) to; 399 syscallarg(int) tolen; 400 } */ 401 struct msghdr msg; 402 struct iovec aiov; 403 struct sockaddr_big nam; 404 struct mbuf *m; 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 error = sockargs(&m, &nam, nam.sb_len, UIO_SYSSPACE, MT_SONAME); 425 if (error) 426 return error; 427 msg.msg_flags |= MSG_NAMEMBUF; 428 msg.msg_name = m; 429 msg.msg_namelen = nam.sb_len; 430 } 431 432 msg.msg_iov = &aiov; 433 msg.msg_iovlen = 1; 434 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 435 aiov.iov_len = SCARG(uap, len); 436 437 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 438 } 439 440 static void 441 linux_to_bsd_msghdr(const struct linux_msghdr *lmsg, struct msghdr *bmsg) 442 { 443 bmsg->msg_name = lmsg->msg_name; 444 bmsg->msg_namelen = lmsg->msg_namelen; 445 bmsg->msg_iov = lmsg->msg_iov; 446 bmsg->msg_iovlen = lmsg->msg_iovlen; 447 bmsg->msg_control = lmsg->msg_control; 448 bmsg->msg_controllen = lmsg->msg_controllen; 449 bmsg->msg_flags = lmsg->msg_flags; 450 } 451 452 static void 453 bsd_to_linux_msghdr(const struct msghdr *bmsg, struct linux_msghdr *lmsg) 454 { 455 lmsg->msg_name = bmsg->msg_name; 456 lmsg->msg_namelen = bmsg->msg_namelen; 457 lmsg->msg_iov = bmsg->msg_iov; 458 lmsg->msg_iovlen = bmsg->msg_iovlen; 459 lmsg->msg_control = bmsg->msg_control; 460 lmsg->msg_controllen = bmsg->msg_controllen; 461 lmsg->msg_flags = bmsg->msg_flags; 462 } 463 464 int 465 linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval) 466 { 467 /* { 468 syscallarg(int) s; 469 syscallarg(struct linux_msghdr *) msg; 470 syscallarg(u_int) flags; 471 } */ 472 struct msghdr msg; 473 struct linux_msghdr lmsg; 474 int error; 475 int bflags; 476 struct sockaddr_big nam; 477 u_int8_t *control; 478 struct mbuf *ctl_mbuf = NULL; 479 480 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 481 if (error) 482 return error; 483 linux_to_bsd_msghdr(&lmsg, &msg); 484 485 msg.msg_flags = MSG_IOVUSRSPACE; 486 487 /* 488 * Translate message flags. 489 */ 490 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 491 if (bflags < 0) 492 /* Some supported flag */ 493 return EINVAL; 494 495 if (lmsg.msg_name) { 496 /* Read in and convert the sockaddr */ 497 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 498 msg.msg_namelen); 499 if (error) 500 return (error); 501 msg.msg_name = &nam; 502 } 503 504 /* 505 * Handle cmsg if there is any. 506 */ 507 if (LINUX_CMSG_FIRSTHDR(&lmsg)) { 508 struct linux_cmsghdr l_cmsg, *l_cc; 509 struct cmsghdr *cmsg; 510 ssize_t resid = msg.msg_controllen; 511 size_t clen, cidx = 0, cspace; 512 513 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 514 clen = MLEN; 515 control = mtod(ctl_mbuf, void *); 516 517 l_cc = LINUX_CMSG_FIRSTHDR(&lmsg); 518 do { 519 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 520 if (error) 521 goto done; 522 523 /* 524 * Sanity check the control message length. 525 */ 526 if (l_cmsg.cmsg_len > resid 527 || l_cmsg.cmsg_len < sizeof l_cmsg) { 528 error = EINVAL; 529 goto done; 530 } 531 532 /* 533 * Refuse unsupported control messages, and 534 * translate fields as appropriate. 535 */ 536 switch (l_cmsg.cmsg_level) { 537 case LINUX_SOL_SOCKET: 538 /* It only differs on some archs */ 539 if (LINUX_SOL_SOCKET != SOL_SOCKET) 540 l_cmsg.cmsg_level = SOL_SOCKET; 541 542 switch(l_cmsg.cmsg_type) { 543 case LINUX_SCM_RIGHTS: 544 /* Linux SCM_RIGHTS is same as NetBSD */ 545 break; 546 547 case LINUX_SCM_CREDENTIALS: 548 /* no native equivalent, just drop it */ 549 m_free(ctl_mbuf); 550 ctl_mbuf = NULL; 551 msg.msg_control = NULL; 552 msg.msg_controllen = 0; 553 goto skipcmsg; 554 555 default: 556 /* other types not supported */ 557 error = EINVAL; 558 goto done; 559 } 560 break; 561 default: 562 /* pray and leave intact */ 563 break; 564 } 565 566 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 567 568 /* Check the buffer is big enough */ 569 if (__predict_false(cidx + cspace > clen)) { 570 u_int8_t *nc; 571 572 clen = cidx + cspace; 573 if (clen >= PAGE_SIZE) { 574 error = EINVAL; 575 goto done; 576 } 577 nc = realloc(clen <= MLEN ? NULL : control, 578 clen, M_TEMP, M_WAITOK); 579 if (!nc) { 580 error = ENOMEM; 581 goto done; 582 } 583 if (cidx <= MLEN) 584 /* Old buffer was in mbuf... */ 585 memcpy(nc, control, cidx); 586 control = nc; 587 } 588 589 /* Copy header */ 590 cmsg = (void *)&control[cidx]; 591 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 592 cmsg->cmsg_level = l_cmsg.cmsg_level; 593 cmsg->cmsg_type = l_cmsg.cmsg_type; 594 595 /* Zero area between header and data */ 596 memset(cmsg + 1, 0, 597 CMSG_ALIGN(sizeof(*cmsg)) - sizeof(*cmsg)); 598 599 /* Copyin the data */ 600 error = copyin(LINUX_CMSG_DATA(l_cc), 601 CMSG_DATA(cmsg), 602 l_cmsg.cmsg_len - sizeof(l_cmsg)); 603 if (error) 604 goto done; 605 606 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 607 cidx += cspace; 608 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 609 610 /* If we allocated a buffer, attach to mbuf */ 611 if (cidx > MLEN) { 612 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 613 ctl_mbuf->m_flags |= M_EXT_RW; 614 } 615 control = NULL; 616 ctl_mbuf->m_len = cidx; 617 618 msg.msg_control = ctl_mbuf; 619 msg.msg_flags |= MSG_CONTROLMBUF; 620 621 ktrkuser("mbcontrol", mtod(ctl_mbuf, void *), 622 msg.msg_controllen); 623 } 624 625 skipcmsg: 626 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 627 /* Freed internally */ 628 ctl_mbuf = NULL; 629 630 done: 631 if (ctl_mbuf != NULL) { 632 if (control != NULL && control != mtod(ctl_mbuf, void *)) 633 free(control, M_MBUF); 634 m_free(ctl_mbuf); 635 } 636 return (error); 637 } 638 639 int 640 linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval) 641 { 642 /* { 643 syscallarg(int) s; 644 syscallarg(void *) buf; 645 syscallarg(int) len; 646 syscallarg(int) flags; 647 syscallarg(struct osockaddr *) from; 648 syscallarg(int *) fromlenaddr; 649 } */ 650 int error; 651 struct sys_recvfrom_args bra; 652 653 SCARG(&bra, s) = SCARG(uap, s); 654 SCARG(&bra, buf) = SCARG(uap, buf); 655 SCARG(&bra, len) = SCARG(uap, len); 656 SCARG(&bra, flags) = SCARG(uap, flags); 657 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 658 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 659 660 if ((error = sys_recvfrom(l, &bra, retval))) 661 return (error); 662 663 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 664 return (error); 665 666 return (0); 667 } 668 669 static int 670 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 671 { 672 int dlen, error = 0; 673 struct cmsghdr *cmsg; 674 struct linux_cmsghdr linux_cmsg; 675 struct mbuf *m; 676 char *q, *q_end; 677 678 if (mp->msg_controllen <= 0 || control == 0) { 679 mp->msg_controllen = 0; 680 free_control_mbuf(l, control, control); 681 return 0; 682 } 683 684 ktrkuser("msgcontrol", mtod(control, void *), mp->msg_controllen); 685 686 q = (char *)mp->msg_control; 687 q_end = q + mp->msg_controllen; 688 689 for (m = control; m != NULL; ) { 690 cmsg = mtod(m, struct cmsghdr *); 691 692 /* 693 * Fixup cmsg. We handle two things: 694 * 0. different sizeof cmsg_len. 695 * 1. different values for level/type on some archs 696 * 2. different alignment of CMSG_DATA on some archs 697 */ 698 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 699 linux_cmsg.cmsg_level = cmsg->cmsg_level; 700 linux_cmsg.cmsg_type = cmsg->cmsg_type; 701 702 dlen = q_end - q; 703 if (linux_cmsg.cmsg_len > dlen) { 704 /* Not enough room for the parameter */ 705 dlen -= sizeof linux_cmsg; 706 if (dlen <= 0) 707 /* Discard if header wont fit */ 708 break; 709 mp->msg_flags |= MSG_CTRUNC; 710 if (linux_cmsg.cmsg_level == SOL_SOCKET 711 && linux_cmsg.cmsg_type == SCM_RIGHTS) 712 /* Do not truncate me ... */ 713 break; 714 } else 715 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 716 717 switch (linux_cmsg.cmsg_level) { 718 case SOL_SOCKET: 719 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 720 switch (linux_cmsg.cmsg_type) { 721 case SCM_RIGHTS: 722 /* Linux SCM_RIGHTS is same as NetBSD */ 723 break; 724 725 default: 726 /* other types not supported */ 727 error = EINVAL; 728 goto done; 729 } 730 /* machine dependent ! */ 731 break; 732 default: 733 /* pray and leave intact */ 734 break; 735 } 736 737 /* There can be padding between the header and data... */ 738 error = copyout(&linux_cmsg, q, sizeof linux_cmsg); 739 if (error != 0) { 740 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 741 dlen); 742 } 743 if (error != 0) { 744 /* We must free all the SCM_RIGHTS */ 745 m = control; 746 break; 747 } 748 m = m->m_next; 749 if (m == NULL || q + LINUX_CMSG_SPACE(dlen) > q_end) { 750 q += LINUX_CMSG_LEN(dlen); 751 break; 752 } 753 q += LINUX_CMSG_SPACE(dlen); 754 } 755 756 done: 757 free_control_mbuf(l, control, m); 758 759 mp->msg_controllen = q - (char *)mp->msg_control; 760 return error; 761 } 762 763 int 764 linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval) 765 { 766 /* { 767 syscallarg(int) s; 768 syscallarg(struct linux_msghdr *) msg; 769 syscallarg(u_int) flags; 770 } */ 771 struct msghdr msg; 772 struct linux_msghdr lmsg; 773 int error; 774 struct mbuf *from, *control; 775 776 error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); 777 if (error) 778 return (error); 779 linux_to_bsd_msghdr(&lmsg, &msg); 780 781 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 782 if (msg.msg_flags < 0) { 783 /* Some unsupported flag */ 784 return (EINVAL); 785 } 786 msg.msg_flags |= MSG_IOVUSRSPACE; 787 788 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 789 msg.msg_control != NULL ? &control : NULL, retval); 790 if (error != 0) 791 return error; 792 793 if (msg.msg_control != NULL) 794 error = linux_copyout_msg_control(l, &msg, control); 795 796 if (error == 0 && from != 0) { 797 mtod(from, struct osockaddr *)->sa_family = 798 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 799 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 800 from); 801 } else 802 msg.msg_namelen = 0; 803 804 if (from != NULL) 805 m_free(from); 806 807 if (error == 0) { 808 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 809 if (msg.msg_flags < 0) 810 /* Some flag unsupported by Linux */ 811 error = EINVAL; 812 else { 813 ktrkuser("msghdr", &msg, sizeof(msg)); 814 bsd_to_linux_msghdr(&msg, &lmsg); 815 error = copyout(&lmsg, SCARG(uap, msg), sizeof(lmsg)); 816 } 817 } 818 819 return (error); 820 } 821 822 /* 823 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 824 * is different, the rest matches IPPROTO_* on both systems. 825 */ 826 int 827 linux_to_bsd_sopt_level(int llevel) 828 { 829 830 switch (llevel) { 831 case LINUX_SOL_SOCKET: 832 return SOL_SOCKET; 833 case LINUX_SOL_IP: 834 return IPPROTO_IP; 835 #ifdef INET6 836 case LINUX_SOL_IPV6: 837 return IPPROTO_IPV6; 838 #endif 839 case LINUX_SOL_TCP: 840 return IPPROTO_TCP; 841 case LINUX_SOL_UDP: 842 return IPPROTO_UDP; 843 default: 844 return -1; 845 } 846 } 847 848 /* 849 * Convert Linux socket level socket option numbers to NetBSD values. 850 */ 851 int 852 linux_to_bsd_so_sockopt(int lopt) 853 { 854 855 switch (lopt) { 856 case LINUX_SO_DEBUG: 857 return SO_DEBUG; 858 case LINUX_SO_REUSEADDR: 859 /* 860 * Linux does not implement SO_REUSEPORT, but allows reuse of a 861 * host:port pair through SO_REUSEADDR even if the address is not a 862 * multicast-address. Effectively, this means that we should use 863 * SO_REUSEPORT to allow Linux applications to not exit with 864 * EADDRINUSE 865 */ 866 return SO_REUSEPORT; 867 case LINUX_SO_TYPE: 868 return SO_TYPE; 869 case LINUX_SO_ERROR: 870 return SO_ERROR; 871 case LINUX_SO_DONTROUTE: 872 return SO_DONTROUTE; 873 case LINUX_SO_BROADCAST: 874 return SO_BROADCAST; 875 case LINUX_SO_SNDBUF: 876 return SO_SNDBUF; 877 case LINUX_SO_RCVBUF: 878 return SO_RCVBUF; 879 case LINUX_SO_SNDLOWAT: 880 return SO_SNDLOWAT; 881 case LINUX_SO_RCVLOWAT: 882 return SO_RCVLOWAT; 883 case LINUX_SO_KEEPALIVE: 884 return SO_KEEPALIVE; 885 case LINUX_SO_OOBINLINE: 886 return SO_OOBINLINE; 887 case LINUX_SO_LINGER: 888 return SO_LINGER; 889 case LINUX_SO_ACCEPTCONN: 890 return SO_ACCEPTCONN; 891 case LINUX_SO_PRIORITY: 892 case LINUX_SO_NO_CHECK: 893 default: 894 return -1; 895 } 896 } 897 898 /* 899 * Convert Linux IP level socket option number to NetBSD values. 900 */ 901 int 902 linux_to_bsd_ip_sockopt(int lopt) 903 { 904 905 switch (lopt) { 906 case LINUX_IP_TOS: 907 return IP_TOS; 908 case LINUX_IP_TTL: 909 return IP_TTL; 910 case LINUX_IP_HDRINCL: 911 return IP_HDRINCL; 912 case LINUX_IP_MULTICAST_TTL: 913 return IP_MULTICAST_TTL; 914 case LINUX_IP_MULTICAST_LOOP: 915 return IP_MULTICAST_LOOP; 916 case LINUX_IP_MULTICAST_IF: 917 return IP_MULTICAST_IF; 918 case LINUX_IP_ADD_MEMBERSHIP: 919 return IP_ADD_MEMBERSHIP; 920 case LINUX_IP_DROP_MEMBERSHIP: 921 return IP_DROP_MEMBERSHIP; 922 default: 923 return -1; 924 } 925 } 926 927 /* 928 * Convert Linux IPV6 level socket option number to NetBSD values. 929 */ 930 #ifdef INET6 931 int 932 linux_to_bsd_ipv6_sockopt(int lopt) 933 { 934 935 switch (lopt) { 936 case LINUX_IPV6_V6ONLY: 937 return IPV6_V6ONLY; 938 default: 939 return -1; 940 } 941 } 942 #endif 943 944 /* 945 * Convert Linux TCP level socket option number to NetBSD values. 946 */ 947 int 948 linux_to_bsd_tcp_sockopt(int lopt) 949 { 950 951 switch (lopt) { 952 case LINUX_TCP_NODELAY: 953 return TCP_NODELAY; 954 case LINUX_TCP_MAXSEG: 955 return TCP_MAXSEG; 956 default: 957 return -1; 958 } 959 } 960 961 /* 962 * Convert Linux UDP level socket option number to NetBSD values. 963 */ 964 int 965 linux_to_bsd_udp_sockopt(int lopt) 966 { 967 968 switch (lopt) { 969 default: 970 return -1; 971 } 972 } 973 974 /* 975 * Another reasonably straightforward function: setsockopt(2). 976 * The level and option numbers are converted; the values passed 977 * are not (yet) converted, the ones currently implemented don't 978 * need conversion, as they are the same on both systems. 979 */ 980 int 981 linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval) 982 { 983 /* { 984 syscallarg(int) s; 985 syscallarg(int) level; 986 syscallarg(int) optname; 987 syscallarg(void *) optval; 988 syscallarg(int) optlen; 989 } */ 990 struct sys_setsockopt_args bsa; 991 int name; 992 993 SCARG(&bsa, s) = SCARG(uap, s); 994 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 995 SCARG(&bsa, val) = SCARG(uap, optval); 996 SCARG(&bsa, valsize) = SCARG(uap, optlen); 997 998 /* 999 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 1000 * and returns EOPNOTSUPP for other levels 1001 */ 1002 if (SCARG(&bsa, level) != SOL_SOCKET) { 1003 struct socket *so; 1004 int error, family; 1005 1006 /* fd_getsock() will use the descriptor for us */ 1007 if ((error = fd_getsock(SCARG(&bsa, s), &so)) != 0) 1008 return error; 1009 family = so->so_proto->pr_domain->dom_family; 1010 fd_putfile(SCARG(&bsa, s)); 1011 1012 if (family == AF_LOCAL) 1013 return EOPNOTSUPP; 1014 } 1015 1016 switch (SCARG(&bsa, level)) { 1017 case SOL_SOCKET: 1018 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1019 break; 1020 case IPPROTO_IP: 1021 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1022 break; 1023 #ifdef INET6 1024 case IPPROTO_IPV6: 1025 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1026 break; 1027 #endif 1028 case IPPROTO_TCP: 1029 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1030 break; 1031 case IPPROTO_UDP: 1032 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1033 break; 1034 default: 1035 return EINVAL; 1036 } 1037 1038 if (name == -1) 1039 return EINVAL; 1040 SCARG(&bsa, name) = name; 1041 1042 return sys_setsockopt(l, &bsa, retval); 1043 } 1044 1045 /* 1046 * getsockopt(2) is very much the same as setsockopt(2) (see above) 1047 */ 1048 int 1049 linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval) 1050 { 1051 /* { 1052 syscallarg(int) s; 1053 syscallarg(int) level; 1054 syscallarg(int) optname; 1055 syscallarg(void *) optval; 1056 syscallarg(int *) optlen; 1057 } */ 1058 struct sys_getsockopt_args bga; 1059 int name; 1060 1061 SCARG(&bga, s) = SCARG(uap, s); 1062 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 1063 SCARG(&bga, val) = SCARG(uap, optval); 1064 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 1065 1066 switch (SCARG(&bga, level)) { 1067 case SOL_SOCKET: 1068 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1069 break; 1070 case IPPROTO_IP: 1071 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1072 break; 1073 #ifdef INET6 1074 case IPPROTO_IPV6: 1075 name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); 1076 break; 1077 #endif 1078 case IPPROTO_TCP: 1079 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1080 break; 1081 case IPPROTO_UDP: 1082 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1083 break; 1084 default: 1085 return EINVAL; 1086 } 1087 1088 if (name == -1) 1089 return EINVAL; 1090 SCARG(&bga, name) = name; 1091 1092 return sys_getsockopt(l, &bga, retval); 1093 } 1094 1095 int 1096 linux_getifname(struct lwp *l, register_t *retval, void *data) 1097 { 1098 struct ifnet *ifp; 1099 struct linux_ifreq ifr; 1100 int error; 1101 int s; 1102 1103 error = copyin(data, &ifr, sizeof(ifr)); 1104 if (error) 1105 return error; 1106 1107 s = pserialize_read_enter(); 1108 ifp = if_byindex(ifr.ifr_ifru.ifru_ifindex); 1109 if (ifp == NULL) { 1110 pserialize_read_exit(s); 1111 return ENODEV; 1112 } 1113 1114 strncpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 1115 pserialize_read_exit(s); 1116 1117 return copyout(&ifr, data, sizeof(ifr)); 1118 } 1119 1120 int 1121 linux_getifconf(struct lwp *l, register_t *retval, void *data) 1122 { 1123 struct linux_ifreq ifr, *ifrp = NULL; 1124 struct linux_ifconf ifc; 1125 struct ifnet *ifp; 1126 struct sockaddr *sa; 1127 struct osockaddr *osa; 1128 int space = 0, error; 1129 const int sz = (int)sizeof(ifr); 1130 bool docopy; 1131 int s; 1132 int bound; 1133 struct psref psref; 1134 1135 error = copyin(data, &ifc, sizeof(ifc)); 1136 if (error) 1137 return error; 1138 1139 memset(&ifr, 0, sizeof(ifr)); 1140 docopy = ifc.ifc_req != NULL; 1141 if (docopy) { 1142 space = ifc.ifc_len; 1143 ifrp = ifc.ifc_req; 1144 } 1145 1146 bound = curlwp_bind(); 1147 s = pserialize_read_enter(); 1148 IFNET_READER_FOREACH(ifp) { 1149 struct ifaddr *ifa; 1150 if_acquire(ifp, &psref); 1151 pserialize_read_exit(s); 1152 1153 (void)strncpy(ifr.ifr_name, ifp->if_xname, 1154 sizeof(ifr.ifr_name)); 1155 if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') { 1156 error = ENAMETOOLONG; 1157 goto release_exit; 1158 } 1159 1160 s = pserialize_read_enter(); 1161 IFADDR_READER_FOREACH(ifa, ifp) { 1162 struct psref psref_ifa; 1163 ifa_acquire(ifa, &psref_ifa); 1164 pserialize_read_exit(s); 1165 1166 sa = ifa->ifa_addr; 1167 if (sa->sa_family != AF_INET || 1168 sa->sa_len > sizeof(*osa)) 1169 goto next; 1170 memcpy(&ifr.ifr_addr, sa, sa->sa_len); 1171 osa = (struct osockaddr *)&ifr.ifr_addr; 1172 osa->sa_family = sa->sa_family; 1173 if (space >= sz) { 1174 error = copyout(&ifr, ifrp, sz); 1175 if (error != 0) { 1176 ifa_release(ifa, &psref_ifa); 1177 goto release_exit; 1178 } 1179 ifrp++; 1180 } 1181 space -= sz; 1182 next: 1183 s = pserialize_read_enter(); 1184 ifa_release(ifa, &psref_ifa); 1185 } 1186 1187 KASSERT(pserialize_in_read_section()); 1188 if_release(ifp, &psref); 1189 } 1190 pserialize_read_exit(s); 1191 curlwp_bindx(bound); 1192 1193 if (docopy) 1194 ifc.ifc_len -= space; 1195 else 1196 ifc.ifc_len = -space; 1197 1198 return copyout(&ifc, data, sizeof(ifc)); 1199 1200 release_exit: 1201 if_release(ifp, &psref); 1202 curlwp_bindx(bound); 1203 return error; 1204 } 1205 1206 int 1207 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 1208 void *data) 1209 { 1210 /* Not the full structure, just enough to map what we do here */ 1211 struct linux_ifreq lreq; 1212 file_t *fp; 1213 struct ifaddr *ifa; 1214 struct ifnet *ifp; 1215 struct sockaddr_dl *sadl; 1216 int error, found; 1217 int index, ifnum; 1218 int s; 1219 1220 /* 1221 * We can't emulate this ioctl by calling sys_ioctl() to run 1222 * SIOCGIFCONF, because the user buffer is not of the right 1223 * type to take those results. We can't use kernel buffers to 1224 * receive the results, as the implementation of sys_ioctl() 1225 * and ifconf() [which implements SIOCGIFCONF] use 1226 * copyin()/copyout() which will fail on kernel addresses. 1227 * 1228 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1229 */ 1230 1231 if ((fp = fd_getfile(fd)) == NULL) 1232 return (EBADF); 1233 1234 KERNEL_LOCK(1, NULL); 1235 1236 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1237 error = EBADF; 1238 goto out; 1239 } 1240 1241 error = copyin(data, &lreq, sizeof(lreq)); 1242 if (error) 1243 goto out; 1244 lreq.ifr_name[LINUX_IFNAMSIZ-1] = '\0'; /* just in case */ 1245 1246 /* 1247 * Try real interface name first, then fake "ethX" 1248 */ 1249 found = 0; 1250 s = pserialize_read_enter(); 1251 IFNET_READER_FOREACH(ifp) { 1252 if (found) 1253 break; 1254 if (strcmp(lreq.ifr_name, ifp->if_xname)) 1255 /* not this interface */ 1256 continue; 1257 1258 found=1; 1259 if (IFADDR_READER_EMPTY(ifp)) { 1260 pserialize_read_exit(s); 1261 error = ENODEV; 1262 goto out; 1263 } 1264 IFADDR_READER_FOREACH(ifa, ifp) { 1265 sadl = satosdl(ifa->ifa_addr); 1266 /* only return ethernet addresses */ 1267 /* XXX what about FDDI, etc. ? */ 1268 if (sadl->sdl_family != AF_LINK || 1269 sadl->sdl_type != IFT_ETHER) 1270 continue; 1271 memcpy(&lreq.ifr_hwaddr.sa_data, 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 pserialize_read_exit(s); 1277 1278 error = copyout(&lreq, data, sizeof(lreq)); 1279 goto out; 1280 } 1281 } 1282 pserialize_read_exit(s); 1283 1284 if (strncmp(lreq.ifr_name, "eth", 3) != 0) { 1285 /* unknown interface, not even an "eth*" name */ 1286 error = ENODEV; 1287 goto out; 1288 } 1289 1290 for (ifnum = 0, index = 3; 1291 index < LINUX_IFNAMSIZ && lreq.ifr_name[index] != '\0'; 1292 index++) { 1293 ifnum *= 10; 1294 ifnum += lreq.ifr_name[index] - '0'; 1295 } 1296 1297 error = EINVAL; /* in case we don't find one */ 1298 s = pserialize_read_enter(); 1299 IFNET_READER_FOREACH(ifp) { 1300 memcpy(lreq.ifr_name, ifp->if_xname, 1301 MIN(LINUX_IFNAMSIZ, IFNAMSIZ)); 1302 IFADDR_READER_FOREACH(ifa, ifp) { 1303 sadl = satosdl(ifa->ifa_addr); 1304 /* only return ethernet addresses */ 1305 /* XXX what about FDDI, etc. ? */ 1306 if (sadl->sdl_family != AF_LINK || 1307 sadl->sdl_type != IFT_ETHER) 1308 continue; 1309 if (ifnum--) 1310 /* not the reqested iface */ 1311 continue; 1312 memcpy(&lreq.ifr_hwaddr.sa_data, 1313 CLLADDR(sadl), 1314 MIN(sadl->sdl_alen, 1315 sizeof(lreq.ifr_hwaddr.sa_data))); 1316 lreq.ifr_hwaddr.sa_family = 1317 sadl->sdl_family; 1318 pserialize_read_exit(s); 1319 1320 error = copyout(&lreq, data, sizeof(lreq)); 1321 goto out; 1322 } 1323 } 1324 pserialize_read_exit(s); 1325 1326 out: 1327 KERNEL_UNLOCK_ONE(NULL); 1328 fd_putfile(fd); 1329 return error; 1330 } 1331 1332 int 1333 linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) 1334 { 1335 /* { 1336 syscallarg(int) fd; 1337 syscallarg(u_long) com; 1338 syscallarg(void *) data; 1339 } */ 1340 u_long com; 1341 int error = 0, isdev = 0, dosys = 1; 1342 struct sys_ioctl_args ia; 1343 file_t *fp; 1344 struct vnode *vp; 1345 int (*ioctlf)(file_t *, u_long, void *); 1346 struct ioctl_pt pt; 1347 1348 if ((fp = fd_getfile(SCARG(uap, fd))) == NULL) 1349 return (EBADF); 1350 1351 if (fp->f_type == DTYPE_VNODE) { 1352 vp = (struct vnode *)fp->f_data; 1353 isdev = vp->v_type == VCHR; 1354 } 1355 1356 /* 1357 * Don't try to interpret socket ioctl calls that are done 1358 * on a device filedescriptor, just pass them through, to 1359 * emulate Linux behaviour. Use PTIOCLINUX so that the 1360 * device will only handle these if it's prepared to do 1361 * so, to avoid unexpected things from happening. 1362 */ 1363 if (isdev) { 1364 dosys = 0; 1365 ioctlf = fp->f_ops->fo_ioctl; 1366 pt.com = SCARG(uap, com); 1367 pt.data = SCARG(uap, data); 1368 error = ioctlf(fp, PTIOCLINUX, &pt); 1369 /* 1370 * XXX hack: if the function returns EJUSTRETURN, 1371 * it has stuffed a sysctl return value in pt.data. 1372 */ 1373 if (error == EJUSTRETURN) { 1374 retval[0] = (register_t)pt.data; 1375 error = 0; 1376 } 1377 goto out; 1378 } 1379 1380 com = SCARG(uap, com); 1381 retval[0] = 0; 1382 1383 switch (com) { 1384 case LINUX_SIOCGIFNAME: 1385 error = linux_getifname(l, retval, SCARG(uap, data)); 1386 dosys = 0; 1387 break; 1388 case LINUX_SIOCGIFCONF: 1389 error = linux_getifconf(l, retval, SCARG(uap, data)); 1390 dosys = 0; 1391 break; 1392 case LINUX_SIOCGIFFLAGS: 1393 SCARG(&ia, com) = OSIOCGIFFLAGS; 1394 break; 1395 case LINUX_SIOCSIFFLAGS: 1396 SCARG(&ia, com) = OSIOCSIFFLAGS; 1397 break; 1398 case LINUX_SIOCGIFADDR: 1399 SCARG(&ia, com) = OOSIOCGIFADDR; 1400 break; 1401 case LINUX_SIOCGIFDSTADDR: 1402 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1403 break; 1404 case LINUX_SIOCGIFBRDADDR: 1405 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1406 break; 1407 case LINUX_SIOCGIFNETMASK: 1408 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1409 break; 1410 case LINUX_SIOCGIFMTU: 1411 SCARG(&ia, com) = OSIOCGIFMTU; 1412 break; 1413 case LINUX_SIOCADDMULTI: 1414 SCARG(&ia, com) = OSIOCADDMULTI; 1415 break; 1416 case LINUX_SIOCDELMULTI: 1417 SCARG(&ia, com) = OSIOCDELMULTI; 1418 break; 1419 case LINUX_SIOCGIFHWADDR: 1420 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1421 SCARG(uap, data)); 1422 dosys = 0; 1423 break; 1424 default: 1425 error = EINVAL; 1426 } 1427 1428 out: 1429 fd_putfile(SCARG(uap, fd)); 1430 1431 if (error ==0 && dosys) { 1432 SCARG(&ia, fd) = SCARG(uap, fd); 1433 SCARG(&ia, data) = SCARG(uap, data); 1434 error = sys_ioctl(curlwp, &ia, retval); 1435 } 1436 1437 return error; 1438 } 1439 1440 int 1441 linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval) 1442 { 1443 /* { 1444 syscallarg(int) s; 1445 syscallarg(const struct sockaddr *) name; 1446 syscallarg(int) namelen; 1447 } */ 1448 int error; 1449 struct sockaddr_big sb; 1450 1451 error = linux_get_sa(l, SCARG(uap, s), &sb, SCARG(uap, name), 1452 SCARG(uap, namelen)); 1453 if (error) 1454 return (error); 1455 1456 error = do_sys_connect(l, SCARG(uap, s), (struct sockaddr *)&sb); 1457 1458 if (error == EISCONN) { 1459 struct socket *so; 1460 int state, prflags; 1461 1462 /* fd_getsock() will use the descriptor for us */ 1463 if (fd_getsock(SCARG(uap, s), &so) != 0) 1464 return EISCONN; 1465 1466 solock(so); 1467 state = so->so_state; 1468 prflags = so->so_proto->pr_flags; 1469 sounlock(so); 1470 fd_putfile(SCARG(uap, s)); 1471 /* 1472 * We should only let this call succeed once per 1473 * non-blocking connect; however we don't have 1474 * a convenient place to keep that state.. 1475 */ 1476 if ((state & (SS_ISCONNECTED|SS_NBIO)) == 1477 (SS_ISCONNECTED|SS_NBIO) && 1478 (prflags & PR_CONNREQUIRED)) 1479 return 0; 1480 } 1481 1482 return (error); 1483 } 1484 1485 int 1486 linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval) 1487 { 1488 /* { 1489 syscallarg(int) s; 1490 syscallarg(const struct osockaddr *) name; 1491 syscallarg(int) namelen; 1492 } */ 1493 int error; 1494 struct sockaddr_big sb; 1495 1496 error = linux_get_sa(l, SCARG(uap, s), &sb, SCARG(uap, name), 1497 SCARG(uap, namelen)); 1498 if (error) 1499 return (error); 1500 1501 return do_sys_bind(l, SCARG(uap, s), (struct sockaddr *)&sb); 1502 } 1503 1504 int 1505 linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval) 1506 { 1507 /* { 1508 syscallarg(int) fdes; 1509 syscallarg(void *) asa; 1510 syscallarg(int *) alen; 1511 } */ 1512 int error; 1513 1514 if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0) 1515 return (error); 1516 1517 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1518 return (error); 1519 1520 return (0); 1521 } 1522 1523 int 1524 linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval) 1525 { 1526 /* { 1527 syscallarg(int) fdes; 1528 syscallarg(void *) asa; 1529 syscallarg(int *) alen; 1530 } */ 1531 int error; 1532 1533 if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0) 1534 return (error); 1535 1536 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1537 return (error); 1538 1539 return (0); 1540 } 1541 1542 /* 1543 * Copy the osockaddr structure pointed to by name to sb, adjust 1544 * family and convert to sockaddr. 1545 */ 1546 static int 1547 linux_get_sa(struct lwp *l, int s, struct sockaddr_big *sb, 1548 const struct osockaddr *name, socklen_t namelen) 1549 { 1550 int error, bdom; 1551 1552 if (namelen > UCHAR_MAX || 1553 namelen <= offsetof(struct sockaddr_big, sb_data)) 1554 return EINVAL; 1555 1556 error = copyin(name, sb, namelen); 1557 if (error) 1558 return error; 1559 1560 bdom = linux_to_bsd_domain(sb->sb_family); 1561 if (bdom == -1) 1562 return EINVAL; 1563 1564 /* 1565 * If the family is unspecified, use address family of the socket. 1566 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1567 */ 1568 if (bdom == AF_UNSPEC) { 1569 struct socket *so; 1570 1571 /* fd_getsock() will use the descriptor for us */ 1572 if ((error = fd_getsock(s, &so)) != 0) 1573 return error; 1574 1575 bdom = so->so_proto->pr_domain->dom_family; 1576 fd_putfile(s); 1577 } 1578 1579 /* 1580 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1581 * which lacks the scope id compared with RFC2553 one. If we detect 1582 * the situation, reject the address and write a message to system log. 1583 * 1584 * Still accept addresses for which the scope id is not used. 1585 */ 1586 if (bdom == AF_INET6 && 1587 namelen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { 1588 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sb; 1589 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1590 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1591 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1592 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1593 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1594 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1595 struct proc *p = l->l_proc; 1596 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1597 1598 log(LOG_DEBUG, 1599 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1600 "sockaddr_in6 rejected", 1601 p->p_pid, p->p_comm, uid); 1602 return EINVAL; 1603 } 1604 namelen = sizeof(struct sockaddr_in6); 1605 sin6->sin6_scope_id = 0; 1606 } 1607 1608 if (bdom == AF_INET) 1609 namelen = sizeof(struct sockaddr_in); 1610 1611 sb->sb_family = bdom; 1612 sb->sb_len = namelen; 1613 ktrkuser("mbsoname", sb, namelen); 1614 return 0; 1615 } 1616 1617 static int 1618 linux_sa_put(struct osockaddr *osa) 1619 { 1620 struct sockaddr sa; 1621 struct osockaddr *kosa; 1622 int error, bdom, len; 1623 1624 /* 1625 * Only read/write the sockaddr family and length part, the rest is 1626 * not changed. 1627 */ 1628 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1629 1630 error = copyin(osa, &sa, len); 1631 if (error) 1632 return (error); 1633 1634 bdom = bsd_to_linux_domain(sa.sa_family); 1635 if (bdom == -1) 1636 return (EINVAL); 1637 1638 /* Note: we convert from sockaddr to osockaddr here, too */ 1639 kosa = (struct osockaddr *) &sa; 1640 kosa->sa_family = bdom; 1641 error = copyout(kosa, osa, len); 1642 if (error) 1643 return (error); 1644 1645 return (0); 1646 } 1647 1648 #ifndef __amd64__ 1649 int 1650 linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval) 1651 { 1652 /* { 1653 syscallarg(int) s; 1654 syscallarg(void *) buf; 1655 syscallarg(int) len; 1656 syscallarg(int) flags; 1657 } */ 1658 struct sys_recvfrom_args bra; 1659 1660 1661 SCARG(&bra, s) = SCARG(uap, s); 1662 SCARG(&bra, buf) = SCARG(uap, buf); 1663 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1664 SCARG(&bra, flags) = SCARG(uap, flags); 1665 SCARG(&bra, from) = NULL; 1666 SCARG(&bra, fromlenaddr) = NULL; 1667 1668 return (sys_recvfrom(l, &bra, retval)); 1669 } 1670 1671 int 1672 linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval) 1673 { 1674 /* { 1675 syscallarg(int) s; 1676 syscallarg(void *) buf; 1677 syscallarg(int) len; 1678 syscallarg(int) flags; 1679 } */ 1680 struct sys_sendto_args bsa; 1681 1682 SCARG(&bsa, s) = SCARG(uap, s); 1683 SCARG(&bsa, buf) = SCARG(uap, buf); 1684 SCARG(&bsa, len) = SCARG(uap, len); 1685 SCARG(&bsa, flags) = SCARG(uap, flags); 1686 SCARG(&bsa, to) = NULL; 1687 SCARG(&bsa, tolen) = 0; 1688 1689 return (sys_sendto(l, &bsa, retval)); 1690 } 1691 #endif 1692 1693 int 1694 linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval) 1695 { 1696 /* { 1697 syscallarg(int) s; 1698 syscallarg(struct osockaddr *) name; 1699 syscallarg(int *) anamelen; 1700 } */ 1701 int error; 1702 struct sys_accept_args baa; 1703 1704 SCARG(&baa, s) = SCARG(uap, s); 1705 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1706 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1707 1708 if ((error = sys_accept(l, &baa, retval))) 1709 return (error); 1710 1711 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1712 return (error); 1713 1714 return (0); 1715 } 1716 1717 int 1718 linux_sys_accept4(struct lwp *l, const struct linux_sys_accept4_args *uap, register_t *retval) 1719 { 1720 /* { 1721 syscallarg(int) s; 1722 syscallarg(struct osockaddr *) name; 1723 syscallarg(int *) anamelen; 1724 syscallarg(int) flags; 1725 } */ 1726 int error, flags; 1727 struct sockaddr_big name; 1728 1729 if ((flags = linux_to_bsd_type(SCARG(uap, flags))) == -1) 1730 return EINVAL; 1731 1732 name.sb_len = UCHAR_MAX; 1733 error = do_sys_accept(l, SCARG(uap, s), (struct sockaddr *)&name, 1734 retval, NULL, flags, 0); 1735 if (error != 0) 1736 return error; 1737 1738 error = copyout_sockname_sb((struct sockaddr *)SCARG(uap, name), 1739 SCARG(uap, anamelen), MSG_LENUSRSPACE, &name); 1740 if (error != 0) { 1741 int fd = (int)*retval; 1742 if (fd_getfile(fd) != NULL) 1743 (void)fd_close(fd); 1744 return error; 1745 } 1746 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1747 return error; 1748 1749 return 0; 1750 } 1751 1752 int 1753 linux_sys_sendmmsg(struct lwp *l, const struct linux_sys_sendmmsg_args *uap, 1754 register_t *retval) 1755 { 1756 /* { 1757 syscallarg(int) s; 1758 syscallarg(struct linux_mmsghdr *) msgvec; 1759 syscallarg(unsigned int) vlen; 1760 syscallarg(unsigned int) flags; 1761 } */ 1762 struct linux_mmsghdr lmsg; 1763 struct mmsghdr bmsg; 1764 struct socket *so; 1765 file_t *fp; 1766 struct msghdr *msg = &bmsg.msg_hdr; 1767 int error, s; 1768 unsigned int vlen, flags, dg; 1769 1770 if ((flags = linux_to_bsd_msg_flags(SCARG(uap, flags))) == -1) 1771 return EINVAL; 1772 1773 flags = (flags & MSG_USERFLAGS) | MSG_IOVUSRSPACE; 1774 1775 s = SCARG(uap, s); 1776 if ((error = fd_getsock1(s, &so, &fp)) != 0) 1777 return error; 1778 1779 vlen = SCARG(uap, vlen); 1780 if (vlen > 1024) 1781 vlen = 1024; 1782 1783 for (dg = 0; dg < vlen;) { 1784 error = copyin(SCARG(uap, msgvec) + dg, &lmsg, sizeof(lmsg)); 1785 if (error) 1786 break; 1787 linux_to_bsd_msghdr(&lmsg.msg_hdr, &bmsg.msg_hdr); 1788 1789 msg->msg_flags = flags; 1790 1791 error = do_sys_sendmsg_so(l, s, so, fp, msg, flags, retval); 1792 if (error) 1793 break; 1794 1795 ktrkuser("msghdr", msg, sizeof *msg); 1796 lmsg.msg_len = *retval; 1797 error = copyout(&lmsg, SCARG(uap, msgvec) + dg, sizeof(lmsg)); 1798 if (error) 1799 break; 1800 dg++; 1801 1802 } 1803 1804 *retval = dg; 1805 1806 fd_putfile(s); 1807 1808 /* 1809 * If we succeeded at least once, return 0. 1810 */ 1811 if (dg) 1812 return 0; 1813 return error; 1814 } 1815 1816 int 1817 linux_sys_recvmmsg(struct lwp *l, const struct linux_sys_recvmmsg_args *uap, 1818 register_t *retval) 1819 { 1820 /* { 1821 syscallarg(int) s; 1822 syscallarg(struct linux_mmsghdr *) msgvec; 1823 syscallarg(unsigned int) vlen; 1824 syscallarg(unsigned int) flags; 1825 syscallarg(struct linux_timespec *) timeout; 1826 } */ 1827 struct linux_mmsghdr lmsg; 1828 struct mmsghdr bmsg; 1829 struct socket *so; 1830 struct msghdr *msg = &bmsg.msg_hdr; 1831 int error, s; 1832 struct mbuf *from, *control; 1833 struct timespec ts = {0}, now; 1834 struct linux_timespec lts; 1835 unsigned int vlen, flags, dg; 1836 1837 if (SCARG(uap, timeout)) { 1838 error = copyin(SCARG(uap, timeout), <s, sizeof(lts)); 1839 return error; 1840 ts.tv_sec = lts.tv_sec; 1841 ts.tv_nsec = lts.tv_nsec; 1842 getnanotime(&now); 1843 timespecadd(&now, &ts, &ts); 1844 } 1845 1846 s = SCARG(uap, s); 1847 if ((error = fd_getsock(s, &so)) != 0) 1848 return error; 1849 1850 /* 1851 * If so->so_rerror holds a deferred error return it now. 1852 */ 1853 if (so->so_rerror) { 1854 error = so->so_rerror; 1855 so->so_rerror = 0; 1856 fd_putfile(s); 1857 return error; 1858 } 1859 1860 vlen = SCARG(uap, vlen); 1861 if (vlen > 1024) 1862 vlen = 1024; 1863 1864 from = NULL; 1865 flags = (SCARG(uap, flags) & MSG_USERFLAGS) | MSG_IOVUSRSPACE; 1866 1867 for (dg = 0; dg < vlen;) { 1868 error = copyin(SCARG(uap, msgvec) + dg, &lmsg, sizeof(lmsg)); 1869 if (error) 1870 break; 1871 linux_to_bsd_msghdr(&lmsg.msg_hdr, &bmsg.msg_hdr); 1872 msg->msg_flags = flags & ~MSG_WAITFORONE; 1873 1874 if (from != NULL) { 1875 m_free(from); 1876 from = NULL; 1877 } 1878 1879 error = do_sys_recvmsg_so(l, s, so, msg, &from, 1880 msg->msg_control != NULL ? &control : NULL, retval); 1881 if (error) { 1882 if (error == EAGAIN && dg > 0) 1883 error = 0; 1884 break; 1885 } 1886 1887 if (msg->msg_control != NULL) 1888 error = linux_copyout_msg_control(l, msg, control); 1889 if (error) 1890 break; 1891 1892 if (from != NULL) { 1893 mtod(from, struct osockaddr *)->sa_family = 1894 bsd_to_linux_domain(mtod(from, 1895 struct sockaddr *)->sa_family); 1896 error = copyout_sockname(msg->msg_name, 1897 &msg->msg_namelen, 0, from); 1898 if (error) 1899 break; 1900 } 1901 1902 1903 lmsg.msg_len = *retval; 1904 ktrkuser("msghdr", msg, sizeof(*msg)); 1905 bsd_to_linux_msghdr(msg, &lmsg.msg_hdr); 1906 error = copyout(&lmsg, SCARG(uap, msgvec) + dg, sizeof(lmsg)); 1907 if (error) 1908 break; 1909 1910 dg++; 1911 if (msg->msg_flags & MSG_OOB) 1912 break; 1913 1914 if (SCARG(uap, timeout)) { 1915 getnanotime(&now); 1916 timespecsub(&now, &ts, &now); 1917 if (now.tv_sec > 0) 1918 break; 1919 } 1920 1921 if (flags & MSG_WAITFORONE) 1922 flags |= MSG_DONTWAIT; 1923 1924 } 1925 1926 if (from != NULL) 1927 m_free(from); 1928 1929 *retval = dg; 1930 1931 /* 1932 * If we succeeded at least once, return 0, hopefully so->so_rerror 1933 * will catch it next time. 1934 */ 1935 if (error && dg > 0) { 1936 so->so_rerror = error; 1937 error = 0; 1938 } 1939 1940 fd_putfile(s); 1941 1942 return error; 1943 } 1944