1 /* $NetBSD: linux_socket.c,v 1.91 2008/04/24 11:38:36 ad 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Functions in multiarch: 41 * linux_sys_socketcall : linux_socketcall.c 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: linux_socket.c,v 1.91 2008/04/24 11:38:36 ad Exp $"); 46 47 #if defined(_KERNEL_OPT) 48 #include "opt_inet.h" 49 #endif /* defined(_KERNEL_OPT) */ 50 51 #include <sys/param.h> 52 #include <sys/kernel.h> 53 #include <sys/systm.h> 54 #include <sys/buf.h> 55 #include <sys/malloc.h> 56 #include <sys/ioctl.h> 57 #include <sys/tty.h> 58 #include <sys/file.h> 59 #include <sys/filedesc.h> 60 #include <sys/select.h> 61 #include <sys/socket.h> 62 #include <sys/socketvar.h> 63 #include <sys/domain.h> 64 #include <net/if.h> 65 #include <net/if_dl.h> 66 #include <net/if_types.h> 67 #include <netinet/in.h> 68 #include <netinet/tcp.h> 69 #include <sys/mount.h> 70 #include <sys/proc.h> 71 #include <sys/vnode.h> 72 #include <sys/device.h> 73 #include <sys/protosw.h> 74 #include <sys/mbuf.h> 75 #include <sys/syslog.h> 76 #include <sys/exec.h> 77 #include <sys/kauth.h> 78 #include <sys/syscallargs.h> 79 #include <sys/ktrace.h> 80 81 #include <lib/libkern/libkern.h> 82 83 #ifdef INET6 84 #include <netinet/ip6.h> 85 #include <netinet6/ip6_var.h> 86 #endif 87 88 #include <compat/sys/socket.h> 89 #include <compat/sys/sockio.h> 90 91 #include <compat/linux/common/linux_types.h> 92 #include <compat/linux/common/linux_util.h> 93 #include <compat/linux/common/linux_signal.h> 94 #include <compat/linux/common/linux_ioctl.h> 95 #include <compat/linux/common/linux_socket.h> 96 #if !defined(__alpha__) && !defined(__amd64__) 97 #include <compat/linux/common/linux_socketcall.h> 98 #endif 99 #include <compat/linux/common/linux_sockio.h> 100 #include <compat/linux/common/linux_ipc.h> 101 #include <compat/linux/common/linux_sem.h> 102 103 #include <compat/linux/linux_syscallargs.h> 104 105 #ifdef DEBUG_LINUX 106 #define DPRINTF(a) uprintf a 107 #else 108 #define DPRINTF(a) 109 #endif 110 111 /* 112 * The calls in this file are entered either via the linux_socketcall() 113 * interface or, on the Alpha, as individual syscalls. The 114 * linux_socketcall function does any massaging of arguments so that all 115 * the calls in here need not think that they are anything other 116 * than a normal syscall. 117 */ 118 119 static int linux_to_bsd_domain(int); 120 static int bsd_to_linux_domain(int); 121 int linux_to_bsd_sopt_level(int); 122 int linux_to_bsd_so_sockopt(int); 123 int linux_to_bsd_ip_sockopt(int); 124 int linux_to_bsd_tcp_sockopt(int); 125 int linux_to_bsd_udp_sockopt(int); 126 int linux_getifhwaddr(struct lwp *, register_t *, u_int, void *); 127 static int linux_get_sa(struct lwp *, int, struct mbuf **, 128 const struct osockaddr *, int); 129 static int linux_sa_put(struct osockaddr *osa); 130 static int linux_to_bsd_msg_flags(int); 131 static int bsd_to_linux_msg_flags(int); 132 133 static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { 134 AF_UNSPEC, 135 AF_UNIX, 136 AF_INET, 137 AF_CCITT, /* LINUX_AF_AX25 */ 138 AF_IPX, 139 AF_APPLETALK, 140 -1, /* LINUX_AF_NETROM */ 141 -1, /* LINUX_AF_BRIDGE */ 142 -1, /* LINUX_AF_ATMPVC */ 143 AF_CCITT, /* LINUX_AF_X25 */ 144 AF_INET6, 145 -1, /* LINUX_AF_ROSE */ 146 AF_DECnet, 147 -1, /* LINUX_AF_NETBEUI */ 148 -1, /* LINUX_AF_SECURITY */ 149 pseudo_AF_KEY, 150 AF_ROUTE, /* LINUX_AF_NETLINK */ 151 -1, /* LINUX_AF_PACKET */ 152 -1, /* LINUX_AF_ASH */ 153 -1, /* LINUX_AF_ECONET */ 154 -1, /* LINUX_AF_ATMSVC */ 155 AF_SNA, 156 /* rest up to LINUX_AF_MAX-1 is not allocated */ 157 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 158 }; 159 160 static const int bsd_to_linux_domain_[AF_MAX] = { 161 LINUX_AF_UNSPEC, 162 LINUX_AF_UNIX, 163 LINUX_AF_INET, 164 -1, /* AF_IMPLINK */ 165 -1, /* AF_PUP */ 166 -1, /* AF_CHAOS */ 167 -1, /* AF_NS */ 168 -1, /* AF_ISO */ 169 -1, /* AF_ECMA */ 170 -1, /* AF_DATAKIT */ 171 LINUX_AF_AX25, /* AF_CCITT */ 172 LINUX_AF_SNA, 173 LINUX_AF_DECnet, 174 -1, /* AF_DLI */ 175 -1, /* AF_LAT */ 176 -1, /* AF_HYLINK */ 177 LINUX_AF_APPLETALK, 178 LINUX_AF_NETLINK, 179 -1, /* AF_LINK */ 180 -1, /* AF_XTP */ 181 -1, /* AF_COIP */ 182 -1, /* AF_CNT */ 183 -1, /* pseudo_AF_RTIP */ 184 LINUX_AF_IPX, 185 LINUX_AF_INET6, 186 -1, /* pseudo_AF_PIP */ 187 -1, /* AF_ISDN */ 188 -1, /* AF_NATM */ 189 -1, /* AF_ARP */ 190 LINUX_pseudo_AF_KEY, 191 -1, /* pseudo_AF_HDRCMPLT */ 192 }; 193 194 static const struct { 195 int bfl; 196 int lfl; 197 } bsd_to_linux_msg_flags_[] = { 198 {MSG_OOB, LINUX_MSG_OOB}, 199 {MSG_PEEK, LINUX_MSG_PEEK}, 200 {MSG_DONTROUTE, LINUX_MSG_DONTROUTE}, 201 {MSG_EOR, LINUX_MSG_EOR}, 202 {MSG_TRUNC, LINUX_MSG_TRUNC}, 203 {MSG_CTRUNC, LINUX_MSG_CTRUNC}, 204 {MSG_WAITALL, LINUX_MSG_WAITALL}, 205 {MSG_DONTWAIT, LINUX_MSG_DONTWAIT}, 206 {MSG_BCAST, 0}, /* not supported, clear */ 207 {MSG_MCAST, 0}, /* not supported, clear */ 208 {-1, /* not supp */ LINUX_MSG_PROBE}, 209 {-1, /* not supp */ LINUX_MSG_FIN}, 210 {-1, /* not supp */ LINUX_MSG_SYN}, 211 {-1, /* not supp */ LINUX_MSG_CONFIRM}, 212 {-1, /* not supp */ LINUX_MSG_RST}, 213 {-1, /* not supp */ LINUX_MSG_ERRQUEUE}, 214 {-1, /* not supp */ LINUX_MSG_NOSIGNAL}, 215 {-1, /* not supp */ LINUX_MSG_MORE}, 216 }; 217 218 /* 219 * Convert between Linux and BSD socket domain values 220 */ 221 static int 222 linux_to_bsd_domain(int ldom) 223 { 224 if (ldom < 0 || ldom >= LINUX_AF_MAX) 225 return (-1); 226 227 return linux_to_bsd_domain_[ldom]; 228 } 229 230 /* 231 * Convert between BSD and Linux socket domain values 232 */ 233 static int 234 bsd_to_linux_domain(int bdom) 235 { 236 if (bdom < 0 || bdom >= AF_MAX) 237 return (-1); 238 239 return bsd_to_linux_domain_[bdom]; 240 } 241 242 static int 243 linux_to_bsd_msg_flags(int lflag) 244 { 245 int i, lfl, bfl; 246 int bflag = 0; 247 248 if (lflag == 0) 249 return (0); 250 251 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 252 bfl = bsd_to_linux_msg_flags_[i].bfl; 253 lfl = bsd_to_linux_msg_flags_[i].lfl; 254 255 if (lfl == 0) 256 continue; 257 258 if (lflag & lfl) { 259 if (bfl < 0) 260 return (-1); 261 262 bflag |= bfl; 263 } 264 } 265 266 return (bflag); 267 } 268 269 static int 270 bsd_to_linux_msg_flags(int bflag) 271 { 272 int i, lfl, bfl; 273 int lflag = 0; 274 275 if (bflag == 0) 276 return (0); 277 278 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 279 bfl = bsd_to_linux_msg_flags_[i].bfl; 280 lfl = bsd_to_linux_msg_flags_[i].lfl; 281 282 if (bfl <= 0) 283 continue; 284 285 if (bflag & bfl) { 286 if (lfl < 0) 287 return (-1); 288 289 lflag |= lfl; 290 } 291 } 292 293 return (lflag); 294 } 295 296 int 297 linux_sys_socket(struct lwp *l, const struct linux_sys_socket_args *uap, register_t *retval) 298 { 299 /* { 300 syscallarg(int) domain; 301 syscallarg(int) type; 302 syscallarg(int) protocol; 303 } */ 304 struct sys___socket30_args bsa; 305 int error; 306 307 SCARG(&bsa, protocol) = SCARG(uap, protocol); 308 SCARG(&bsa, type) = SCARG(uap, type); 309 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 310 if (SCARG(&bsa, domain) == -1) 311 return EINVAL; 312 error = sys___socket30(l, &bsa, retval); 313 314 #ifdef INET6 315 /* 316 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 317 * default and some apps depend on this. So, set V6ONLY to 0 318 * for Linux apps if the sysctl value is set to 1. 319 */ 320 if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { 321 struct socket *so; 322 323 if (fd_getsock(*retval, &so) == 0) { 324 struct mbuf *m; 325 326 m = m_get(M_WAIT, MT_SOOPTS); 327 m->m_len = sizeof(int); 328 *mtod(m, int *) = 0; 329 330 /* ignore error */ 331 (void) sosetopt(so, IPPROTO_IPV6, IPV6_V6ONLY, m); 332 333 fd_putfile(*retval); 334 } 335 } 336 #endif 337 338 return (error); 339 } 340 341 int 342 linux_sys_socketpair(struct lwp *l, const struct linux_sys_socketpair_args *uap, register_t *retval) 343 { 344 /* { 345 syscallarg(int) domain; 346 syscallarg(int) type; 347 syscallarg(int) protocol; 348 syscallarg(int *) rsv; 349 } */ 350 struct sys_socketpair_args bsa; 351 352 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 353 if (SCARG(&bsa, domain) == -1) 354 return EINVAL; 355 SCARG(&bsa, type) = SCARG(uap, type); 356 SCARG(&bsa, protocol) = SCARG(uap, protocol); 357 SCARG(&bsa, rsv) = SCARG(uap, rsv); 358 359 return sys_socketpair(l, &bsa, retval); 360 } 361 362 int 363 linux_sys_sendto(struct lwp *l, const struct linux_sys_sendto_args *uap, register_t *retval) 364 { 365 /* { 366 syscallarg(int) s; 367 syscallarg(void *) msg; 368 syscallarg(int) len; 369 syscallarg(int) flags; 370 syscallarg(struct osockaddr *) to; 371 syscallarg(int) tolen; 372 } */ 373 struct msghdr msg; 374 struct iovec aiov; 375 struct mbuf *nam; 376 int bflags; 377 int error; 378 379 /* Translate message flags. */ 380 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 381 if (bflags < 0) 382 /* Some supported flag */ 383 return EINVAL; 384 385 /* Read in and convert the sockaddr */ 386 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to), 387 SCARG(uap, tolen)); 388 if (error) 389 return (error); 390 msg.msg_flags = MSG_NAMEMBUF; 391 392 msg.msg_name = nam; 393 msg.msg_namelen = SCARG(uap, tolen); 394 msg.msg_iov = &aiov; 395 msg.msg_iovlen = 1; 396 msg.msg_control = 0; 397 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 398 aiov.iov_len = SCARG(uap, len); 399 400 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 401 } 402 403 int 404 linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval) 405 { 406 /* { 407 syscallarg(int) s; 408 syscallarg(struct msghdr *) msg; 409 syscallarg(u_int) flags; 410 } */ 411 struct msghdr msg; 412 int error; 413 int bflags; 414 struct mbuf *nam; 415 u_int8_t *control; 416 struct mbuf *ctl_mbuf = NULL; 417 418 msg.msg_flags = MSG_IOVUSRSPACE; 419 420 /* 421 * Translate message flags. 422 */ 423 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 424 if (bflags < 0) 425 /* Some supported flag */ 426 return EINVAL; 427 428 if (msg.msg_name) { 429 /* Read in and convert the sockaddr */ 430 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 431 msg.msg_namelen); 432 if (error) 433 return (error); 434 msg.msg_flags |= MSG_NAMEMBUF; 435 msg.msg_name = nam; 436 } 437 438 /* 439 * Handle cmsg if there is any. 440 */ 441 if (CMSG_FIRSTHDR(&msg)) { 442 struct linux_cmsghdr l_cmsg, *l_cc; 443 struct cmsghdr *cmsg; 444 ssize_t resid = msg.msg_controllen; 445 size_t clen, cidx = 0, cspace; 446 447 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 448 clen = MLEN; 449 control = mtod(ctl_mbuf, void *); 450 451 l_cc = LINUX_CMSG_FIRSTHDR(&msg); 452 do { 453 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 454 if (error) 455 goto done; 456 457 /* 458 * Sanity check the control message length. 459 */ 460 if (l_cmsg.cmsg_len > resid 461 || l_cmsg.cmsg_len < sizeof l_cmsg) { 462 error = EINVAL; 463 goto done; 464 } 465 466 /* 467 * Refuse unsupported control messages, and 468 * translate fields as appropriate. 469 */ 470 switch (l_cmsg.cmsg_level) { 471 case LINUX_SOL_SOCKET: 472 /* It only differs on some archs */ 473 if (LINUX_SOL_SOCKET != SOL_SOCKET) 474 l_cmsg.cmsg_level = SOL_SOCKET; 475 476 switch(l_cmsg.cmsg_type) { 477 case LINUX_SCM_RIGHTS: 478 /* Linux SCM_RIGHTS is same as NetBSD */ 479 break; 480 481 default: 482 /* other types not supported */ 483 error = EINVAL; 484 goto done; 485 } 486 break; 487 default: 488 /* pray and leave intact */ 489 break; 490 } 491 492 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 493 494 /* Check the buffer is big enough */ 495 if (__predict_false(cidx + cspace > clen)) { 496 u_int8_t *nc; 497 498 clen = cidx + cspace; 499 if (clen >= PAGE_SIZE) { 500 error = EINVAL; 501 goto done; 502 } 503 nc = realloc(clen <= MLEN ? NULL : control, 504 clen, M_TEMP, M_WAITOK); 505 if (!nc) { 506 error = ENOMEM; 507 goto done; 508 } 509 if (cidx <= MLEN) 510 /* Old buffer was in mbuf... */ 511 memcpy(nc, control, cidx); 512 control = nc; 513 } 514 515 /* Copy header */ 516 cmsg = (void *)&control[cidx]; 517 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 518 cmsg->cmsg_level = l_cmsg.cmsg_level; 519 cmsg->cmsg_type = l_cmsg.cmsg_type; 520 521 /* Zero are between header and data */ 522 memset(cmsg + 1, 0, 523 CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg)); 524 525 /* Copyin the data */ 526 error = copyin(LINUX_CMSG_DATA(l_cc), 527 CMSG_DATA(control), 528 l_cmsg.cmsg_len - sizeof(l_cmsg)); 529 if (error) 530 goto done; 531 532 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 533 cidx += cspace; 534 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 535 536 /* If we allocated a buffer, attach to mbuf */ 537 if (cidx > MLEN) { 538 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 539 ctl_mbuf->m_flags |= M_EXT_RW; 540 } 541 control = NULL; 542 ctl_mbuf->m_len = cidx; 543 544 msg.msg_control = ctl_mbuf; 545 msg.msg_flags |= MSG_CONTROLMBUF; 546 } 547 548 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 549 /* Freed internally */ 550 ctl_mbuf = NULL; 551 552 done: 553 if (ctl_mbuf != NULL) { 554 if (control != NULL && control != mtod(ctl_mbuf, void *)) 555 free(control, M_MBUF); 556 m_free(ctl_mbuf); 557 } 558 return (error); 559 } 560 561 int 562 linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval) 563 { 564 /* { 565 syscallarg(int) s; 566 syscallarg(void *) buf; 567 syscallarg(int) len; 568 syscallarg(int) flags; 569 syscallarg(struct osockaddr *) from; 570 syscallarg(int *) fromlenaddr; 571 } */ 572 int error; 573 struct sys_recvfrom_args bra; 574 575 SCARG(&bra, s) = SCARG(uap, s); 576 SCARG(&bra, buf) = SCARG(uap, buf); 577 SCARG(&bra, len) = SCARG(uap, len); 578 SCARG(&bra, flags) = SCARG(uap, flags); 579 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 580 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 581 582 if ((error = sys_recvfrom(l, &bra, retval))) 583 return (error); 584 585 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 586 return (error); 587 588 return (0); 589 } 590 591 static int 592 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 593 { 594 int dlen, error = 0; 595 struct cmsghdr *cmsg; 596 struct linux_cmsghdr linux_cmsg; 597 struct mbuf *m; 598 char *q, *q_end; 599 600 if (mp->msg_controllen <= 0 || control == 0) { 601 mp->msg_controllen = 0; 602 free_control_mbuf(l, control, control); 603 return 0; 604 } 605 606 q = (char *)mp->msg_control; 607 q_end = q + mp->msg_controllen; 608 609 for (m = control; m != NULL; ) { 610 cmsg = mtod(m, struct cmsghdr *); 611 612 /* 613 * Fixup cmsg. We handle two things: 614 * 0. different sizeof cmsg_len. 615 * 1. different values for level/type on some archs 616 * 2. different alignment of CMSG_DATA on some archs 617 */ 618 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 619 linux_cmsg.cmsg_level = cmsg->cmsg_level; 620 linux_cmsg.cmsg_type = cmsg->cmsg_type; 621 622 dlen = q_end - q; 623 if (linux_cmsg.cmsg_len > dlen) { 624 /* Not enough room for the parameter */ 625 dlen -= sizeof linux_cmsg; 626 if (dlen <= 0) 627 /* Discard if header wont fit */ 628 break; 629 mp->msg_flags |= MSG_CTRUNC; 630 if (linux_cmsg.cmsg_level == SOL_SOCKET 631 && linux_cmsg.cmsg_type == SCM_RIGHTS) 632 /* Do not truncate me ... */ 633 break; 634 } else 635 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 636 637 switch (linux_cmsg.cmsg_level) { 638 case SOL_SOCKET: 639 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 640 switch (linux_cmsg.cmsg_type) { 641 case SCM_RIGHTS: 642 /* Linux SCM_RIGHTS is same as NetBSD */ 643 break; 644 645 default: 646 /* other types not supported */ 647 error = EINVAL; 648 goto done; 649 } 650 /* machine dependant ! */ 651 break; 652 default: 653 /* pray and leave intact */ 654 break; 655 } 656 657 /* There can be padding between the header and data... */ 658 error = copyout(&linux_cmsg, q, sizeof *cmsg); 659 if (error != 0) { 660 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 661 dlen); 662 } 663 if (error != 0) { 664 /* We must free all the SCM_RIGHTS */ 665 m = control; 666 break; 667 } 668 m = m->m_next; 669 if (m == NULL || q + LINUX_CMSG_ALIGN(dlen) > q_end) { 670 q += dlen; 671 break; 672 } 673 q += LINUX_CMSG_ALIGN(dlen); 674 } 675 676 done: 677 free_control_mbuf(l, control, m); 678 679 mp->msg_controllen = q - (char *)mp->msg_control; 680 return error; 681 } 682 683 int 684 linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval) 685 { 686 /* { 687 syscallarg(int) s; 688 syscallarg(struct msghdr *) msg; 689 syscallarg(u_int) flags; 690 } */ 691 struct msghdr msg; 692 int error; 693 struct mbuf *from, *control; 694 695 error = copyin(SCARG(uap, msg), &msg, sizeof(msg)); 696 if (error) 697 return (error); 698 699 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 700 if (msg.msg_flags < 0) { 701 /* Some unsupported flag */ 702 return (EINVAL); 703 } 704 msg.msg_flags |= MSG_IOVUSRSPACE; 705 706 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 707 msg.msg_control != NULL ? &control : NULL, retval); 708 if (error != 0) 709 return error; 710 711 if (msg.msg_control != NULL) 712 error = linux_copyout_msg_control(l, &msg, control); 713 714 if (error == 0 && from != 0) { 715 mtod(from, struct osockaddr *)->sa_family = 716 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 717 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 718 from); 719 } else 720 msg.msg_namelen = 0; 721 722 if (from != NULL) 723 m_free(from); 724 725 if (error == 0) { 726 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 727 if (msg.msg_flags < 0) 728 /* Some flag unsupported by Linux */ 729 error = EINVAL; 730 else 731 error = copyout(&msg, SCARG(uap, msg), sizeof(msg)); 732 } 733 734 return (error); 735 } 736 737 /* 738 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 739 * is different, the rest matches IPPROTO_* on both systems. 740 */ 741 int 742 linux_to_bsd_sopt_level(int llevel) 743 { 744 745 switch (llevel) { 746 case LINUX_SOL_SOCKET: 747 return SOL_SOCKET; 748 case LINUX_SOL_IP: 749 return IPPROTO_IP; 750 case LINUX_SOL_TCP: 751 return IPPROTO_TCP; 752 case LINUX_SOL_UDP: 753 return IPPROTO_UDP; 754 default: 755 return -1; 756 } 757 } 758 759 /* 760 * Convert Linux socket level socket option numbers to NetBSD values. 761 */ 762 int 763 linux_to_bsd_so_sockopt(int lopt) 764 { 765 766 switch (lopt) { 767 case LINUX_SO_DEBUG: 768 return SO_DEBUG; 769 case LINUX_SO_REUSEADDR: 770 /* 771 * Linux does not implement SO_REUSEPORT, but allows reuse of a 772 * host:port pair through SO_REUSEADDR even if the address is not a 773 * multicast-address. Effectively, this means that we should use 774 * SO_REUSEPORT to allow Linux applications to not exit with 775 * EADDRINUSE 776 */ 777 return SO_REUSEPORT; 778 case LINUX_SO_TYPE: 779 return SO_TYPE; 780 case LINUX_SO_ERROR: 781 return SO_ERROR; 782 case LINUX_SO_DONTROUTE: 783 return SO_DONTROUTE; 784 case LINUX_SO_BROADCAST: 785 return SO_BROADCAST; 786 case LINUX_SO_SNDBUF: 787 return SO_SNDBUF; 788 case LINUX_SO_RCVBUF: 789 return SO_RCVBUF; 790 case LINUX_SO_KEEPALIVE: 791 return SO_KEEPALIVE; 792 case LINUX_SO_OOBINLINE: 793 return SO_OOBINLINE; 794 case LINUX_SO_LINGER: 795 return SO_LINGER; 796 case LINUX_SO_PRIORITY: 797 case LINUX_SO_NO_CHECK: 798 default: 799 return -1; 800 } 801 } 802 803 /* 804 * Convert Linux IP level socket option number to NetBSD values. 805 */ 806 int 807 linux_to_bsd_ip_sockopt(int lopt) 808 { 809 810 switch (lopt) { 811 case LINUX_IP_TOS: 812 return IP_TOS; 813 case LINUX_IP_TTL: 814 return IP_TTL; 815 case LINUX_IP_MULTICAST_TTL: 816 return IP_MULTICAST_TTL; 817 case LINUX_IP_MULTICAST_LOOP: 818 return IP_MULTICAST_LOOP; 819 case LINUX_IP_MULTICAST_IF: 820 return IP_MULTICAST_IF; 821 case LINUX_IP_ADD_MEMBERSHIP: 822 return IP_ADD_MEMBERSHIP; 823 case LINUX_IP_DROP_MEMBERSHIP: 824 return IP_DROP_MEMBERSHIP; 825 default: 826 return -1; 827 } 828 } 829 830 /* 831 * Convert Linux TCP level socket option number to NetBSD values. 832 */ 833 int 834 linux_to_bsd_tcp_sockopt(int lopt) 835 { 836 837 switch (lopt) { 838 case LINUX_TCP_NODELAY: 839 return TCP_NODELAY; 840 case LINUX_TCP_MAXSEG: 841 return TCP_MAXSEG; 842 default: 843 return -1; 844 } 845 } 846 847 /* 848 * Convert Linux UDP level socket option number to NetBSD values. 849 */ 850 int 851 linux_to_bsd_udp_sockopt(int lopt) 852 { 853 854 switch (lopt) { 855 default: 856 return -1; 857 } 858 } 859 860 /* 861 * Another reasonably straightforward function: setsockopt(2). 862 * The level and option numbers are converted; the values passed 863 * are not (yet) converted, the ones currently implemented don't 864 * need conversion, as they are the same on both systems. 865 */ 866 int 867 linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval) 868 { 869 /* { 870 syscallarg(int) s; 871 syscallarg(int) level; 872 syscallarg(int) optname; 873 syscallarg(void *) optval; 874 syscallarg(int) optlen; 875 } */ 876 struct sys_setsockopt_args bsa; 877 int name; 878 879 SCARG(&bsa, s) = SCARG(uap, s); 880 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 881 SCARG(&bsa, val) = SCARG(uap, optval); 882 SCARG(&bsa, valsize) = SCARG(uap, optlen); 883 884 /* 885 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 886 * and returns EOPNOTSUPP for other levels 887 */ 888 if (SCARG(&bsa, level) != SOL_SOCKET) { 889 struct socket *so; 890 int error, family; 891 892 /* getsock() will use the descriptor for us */ 893 if ((error = fd_getsock(SCARG(&bsa, s), &so)) != 0) 894 return error; 895 family = so->so_proto->pr_domain->dom_family; 896 fd_putfile(SCARG(&bsa, s)); 897 898 if (family == AF_LOCAL) 899 return EOPNOTSUPP; 900 } 901 902 switch (SCARG(&bsa, level)) { 903 case SOL_SOCKET: 904 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 905 break; 906 case IPPROTO_IP: 907 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 908 break; 909 case IPPROTO_TCP: 910 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 911 break; 912 case IPPROTO_UDP: 913 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 914 break; 915 default: 916 return EINVAL; 917 } 918 919 if (name == -1) 920 return EINVAL; 921 SCARG(&bsa, name) = name; 922 923 return sys_setsockopt(l, &bsa, retval); 924 } 925 926 /* 927 * getsockopt(2) is very much the same as setsockopt(2) (see above) 928 */ 929 int 930 linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval) 931 { 932 /* { 933 syscallarg(int) s; 934 syscallarg(int) level; 935 syscallarg(int) optname; 936 syscallarg(void *) optval; 937 syscallarg(int *) optlen; 938 } */ 939 struct sys_getsockopt_args bga; 940 int name; 941 942 SCARG(&bga, s) = SCARG(uap, s); 943 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 944 SCARG(&bga, val) = SCARG(uap, optval); 945 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 946 947 switch (SCARG(&bga, level)) { 948 case SOL_SOCKET: 949 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 950 break; 951 case IPPROTO_IP: 952 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 953 break; 954 case IPPROTO_TCP: 955 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 956 break; 957 case IPPROTO_UDP: 958 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 959 break; 960 default: 961 return EINVAL; 962 } 963 964 if (name == -1) 965 return EINVAL; 966 SCARG(&bga, name) = name; 967 968 return sys_getsockopt(l, &bga, retval); 969 } 970 971 #define IF_NAME_LEN 16 972 973 int 974 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 975 void *data) 976 { 977 /* Not the full structure, just enough to map what we do here */ 978 struct linux_ifreq { 979 char if_name[IF_NAME_LEN]; 980 struct osockaddr hwaddr; 981 } lreq; 982 file_t *fp; 983 struct ifaddr *ifa; 984 struct ifnet *ifp; 985 struct sockaddr_dl *sadl; 986 int error, found; 987 int index, ifnum; 988 989 /* 990 * We can't emulate this ioctl by calling sys_ioctl() to run 991 * SIOCGIFCONF, because the user buffer is not of the right 992 * type to take those results. We can't use kernel buffers to 993 * receive the results, as the implementation of sys_ioctl() 994 * and ifconf() [which implements SIOCGIFCONF] use 995 * copyin()/copyout() which will fail on kernel addresses. 996 * 997 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 998 */ 999 1000 if ((fp = fd_getfile(fd)) == NULL) 1001 return (EBADF); 1002 1003 KERNEL_LOCK(1, NULL); 1004 1005 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1006 error = EBADF; 1007 goto out; 1008 } 1009 1010 error = copyin(data, &lreq, sizeof(lreq)); 1011 if (error) 1012 goto out; 1013 lreq.if_name[IF_NAME_LEN-1] = '\0'; /* just in case */ 1014 1015 /* 1016 * Try real interface name first, then fake "ethX" 1017 */ 1018 found = 0; 1019 IFNET_FOREACH(ifp) { 1020 if (found) 1021 break; 1022 if (strcmp(lreq.if_name, ifp->if_xname)) 1023 /* not this interface */ 1024 continue; 1025 found=1; 1026 if (IFADDR_EMPTY(ifp)) { 1027 error = ENODEV; 1028 goto out; 1029 } 1030 IFADDR_FOREACH(ifa, ifp) { 1031 sadl = satosdl(ifa->ifa_addr); 1032 /* only return ethernet addresses */ 1033 /* XXX what about FDDI, etc. ? */ 1034 if (sadl->sdl_family != AF_LINK || 1035 sadl->sdl_type != IFT_ETHER) 1036 continue; 1037 memcpy(&lreq.hwaddr.sa_data, CLLADDR(sadl), 1038 MIN(sadl->sdl_alen, 1039 sizeof(lreq.hwaddr.sa_data))); 1040 lreq.hwaddr.sa_family = 1041 sadl->sdl_family; 1042 error = copyout(&lreq, data, sizeof(lreq)); 1043 goto out; 1044 } 1045 } 1046 1047 if (strncmp(lreq.if_name, "eth", 3) == 0) { 1048 for (ifnum = 0, index = 3; 1049 lreq.if_name[index] != '\0' && index < IF_NAME_LEN; 1050 index++) { 1051 ifnum *= 10; 1052 ifnum += lreq.if_name[index] - '0'; 1053 } 1054 1055 error = EINVAL; /* in case we don't find one */ 1056 found = 0; 1057 IFNET_FOREACH(ifp) { 1058 if (found) 1059 break; 1060 memcpy(lreq.if_name, ifp->if_xname, 1061 MIN(IF_NAME_LEN, IFNAMSIZ)); 1062 IFADDR_FOREACH(ifa, ifp) { 1063 sadl = satosdl(ifa->ifa_addr); 1064 /* only return ethernet addresses */ 1065 /* XXX what about FDDI, etc. ? */ 1066 if (sadl->sdl_family != AF_LINK || 1067 sadl->sdl_type != IFT_ETHER) 1068 continue; 1069 if (ifnum--) 1070 /* not the reqested iface */ 1071 continue; 1072 memcpy(&lreq.hwaddr.sa_data, 1073 CLLADDR(sadl), 1074 MIN(sadl->sdl_alen, 1075 sizeof(lreq.hwaddr.sa_data))); 1076 lreq.hwaddr.sa_family = 1077 sadl->sdl_family; 1078 error = copyout(&lreq, data, sizeof(lreq)); 1079 found = 1; 1080 break; 1081 } 1082 } 1083 } else { 1084 /* unknown interface, not even an "eth*" name */ 1085 error = ENODEV; 1086 } 1087 1088 out: 1089 KERNEL_UNLOCK_ONE(NULL); 1090 fd_putfile(fd); 1091 return error; 1092 } 1093 #undef IF_NAME_LEN 1094 1095 int 1096 linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) 1097 { 1098 /* { 1099 syscallarg(int) fd; 1100 syscallarg(u_long) com; 1101 syscallarg(void *) data; 1102 } */ 1103 u_long com; 1104 int error = 0, isdev = 0, dosys = 1; 1105 struct sys_ioctl_args ia; 1106 file_t *fp; 1107 struct vnode *vp; 1108 int (*ioctlf)(file_t *, u_long, void *); 1109 struct ioctl_pt pt; 1110 1111 if ((fp = fd_getfile(SCARG(uap, fd))) == NULL) 1112 return (EBADF); 1113 1114 if (fp->f_type == DTYPE_VNODE) { 1115 vp = (struct vnode *)fp->f_data; 1116 isdev = vp->v_type == VCHR; 1117 } 1118 1119 /* 1120 * Don't try to interpret socket ioctl calls that are done 1121 * on a device filedescriptor, just pass them through, to 1122 * emulate Linux behaviour. Use PTIOCLINUX so that the 1123 * device will only handle these if it's prepared to do 1124 * so, to avoid unexpected things from happening. 1125 */ 1126 if (isdev) { 1127 dosys = 0; 1128 ioctlf = fp->f_ops->fo_ioctl; 1129 pt.com = SCARG(uap, com); 1130 pt.data = SCARG(uap, data); 1131 error = ioctlf(fp, PTIOCLINUX, &pt); 1132 /* 1133 * XXX hack: if the function returns EJUSTRETURN, 1134 * it has stuffed a sysctl return value in pt.data. 1135 */ 1136 if (error == EJUSTRETURN) { 1137 retval[0] = (register_t)pt.data; 1138 error = 0; 1139 } 1140 goto out; 1141 } 1142 1143 com = SCARG(uap, com); 1144 retval[0] = 0; 1145 1146 switch (com) { 1147 case LINUX_SIOCGIFCONF: 1148 SCARG(&ia, com) = OOSIOCGIFCONF; 1149 break; 1150 case LINUX_SIOCGIFFLAGS: 1151 SCARG(&ia, com) = OSIOCGIFFLAGS; 1152 break; 1153 case LINUX_SIOCSIFFLAGS: 1154 SCARG(&ia, com) = OSIOCSIFFLAGS; 1155 break; 1156 case LINUX_SIOCGIFADDR: 1157 SCARG(&ia, com) = OOSIOCGIFADDR; 1158 break; 1159 case LINUX_SIOCGIFDSTADDR: 1160 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1161 break; 1162 case LINUX_SIOCGIFBRDADDR: 1163 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1164 break; 1165 case LINUX_SIOCGIFNETMASK: 1166 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1167 break; 1168 case LINUX_SIOCADDMULTI: 1169 SCARG(&ia, com) = OSIOCADDMULTI; 1170 break; 1171 case LINUX_SIOCDELMULTI: 1172 SCARG(&ia, com) = OSIOCDELMULTI; 1173 break; 1174 case LINUX_SIOCGIFHWADDR: 1175 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1176 SCARG(uap, data)); 1177 dosys = 0; 1178 break; 1179 default: 1180 error = EINVAL; 1181 } 1182 1183 out: 1184 fd_putfile(SCARG(uap, fd)); 1185 1186 if (error ==0 && dosys) { 1187 SCARG(&ia, fd) = SCARG(uap, fd); 1188 SCARG(&ia, data) = SCARG(uap, data); 1189 error = sys_ioctl(curlwp, &ia, retval); 1190 } 1191 1192 return error; 1193 } 1194 1195 int 1196 linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval) 1197 { 1198 /* { 1199 syscallarg(int) s; 1200 syscallarg(const struct sockaddr *) name; 1201 syscallarg(int) namelen; 1202 } */ 1203 int error; 1204 struct mbuf *nam; 1205 1206 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1207 SCARG(uap, namelen)); 1208 if (error) 1209 return (error); 1210 1211 error = do_sys_connect(l, SCARG(uap, s), nam); 1212 1213 if (error == EISCONN) { 1214 struct socket *so; 1215 int state, prflags, nbio; 1216 1217 /* getsock() will use the descriptor for us */ 1218 if (fd_getsock(SCARG(uap, s), &so) != 0) 1219 return EISCONN; 1220 1221 solock(so); 1222 state = so->so_state; 1223 nbio = so->so_nbio; 1224 prflags = so->so_proto->pr_flags; 1225 sounlock(so); 1226 fd_putfile(SCARG(uap, s)); 1227 /* 1228 * We should only let this call succeed once per 1229 * non-blocking connect; however we don't have 1230 * a convenient place to keep that state.. 1231 */ 1232 if (nbio && (state & SS_ISCONNECTED) && 1233 (prflags & PR_CONNREQUIRED)) 1234 return 0; 1235 } 1236 1237 return (error); 1238 } 1239 1240 int 1241 linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval) 1242 { 1243 /* { 1244 syscallarg(int) s; 1245 syscallarg(const struct osockaddr *) name; 1246 syscallarg(int) namelen; 1247 } */ 1248 int error; 1249 struct mbuf *nam; 1250 1251 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1252 SCARG(uap, namelen)); 1253 if (error) 1254 return (error); 1255 1256 return do_sys_bind(l, SCARG(uap, s), nam); 1257 } 1258 1259 int 1260 linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval) 1261 { 1262 /* { 1263 syscallarg(int) fdes; 1264 syscallarg(void *) asa; 1265 syscallarg(int *) alen; 1266 } */ 1267 int error; 1268 1269 if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0) 1270 return (error); 1271 1272 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1273 return (error); 1274 1275 return (0); 1276 } 1277 1278 int 1279 linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval) 1280 { 1281 /* { 1282 syscallarg(int) fdes; 1283 syscallarg(void *) asa; 1284 syscallarg(int *) alen; 1285 } */ 1286 int error; 1287 1288 if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0) 1289 return (error); 1290 1291 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1292 return (error); 1293 1294 return (0); 1295 } 1296 1297 /* 1298 * Copy the osockaddr structure pointed to by osa to mbuf, adjust 1299 * family and convert to sockaddr. 1300 */ 1301 static int 1302 linux_get_sa(struct lwp *l, int s, struct mbuf **mp, const struct osockaddr *osa, int salen) 1303 { 1304 int error, bdom; 1305 struct sockaddr *sa; 1306 struct osockaddr *kosa; 1307 struct mbuf *m; 1308 1309 if (salen == 1 || salen > UCHAR_MAX) { 1310 DPRINTF(("bad osa=%p salen=%d\n", osa, salen)); 1311 return EINVAL; 1312 } 1313 1314 /* We'll need the address in an mbuf later, so copy into one here */ 1315 m = m_get(M_WAIT, MT_SONAME); 1316 if (salen > MLEN) 1317 MEXTMALLOC(m, salen, M_WAITOK); 1318 1319 m->m_len = salen; 1320 1321 if (salen == 0) 1322 return 0; 1323 1324 kosa = mtod(m, void *); 1325 if ((error = copyin(osa, kosa, salen))) { 1326 DPRINTF(("error %d copying osa %p len %d\n", 1327 error, osa, salen)); 1328 goto bad; 1329 } 1330 1331 ktrkuser("linux sockaddr", kosa, salen); 1332 1333 bdom = linux_to_bsd_domain(kosa->sa_family); 1334 if (bdom == -1) { 1335 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1336 error = EINVAL; 1337 goto bad; 1338 } 1339 1340 /* 1341 * If the family is unspecified, use address family of the socket. 1342 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1343 */ 1344 if (bdom == AF_UNSPEC) { 1345 struct socket *so; 1346 1347 /* getsock() will use the descriptor for us */ 1348 if ((error = fd_getsock(s, &so)) != 0) 1349 goto bad; 1350 1351 bdom = so->so_proto->pr_domain->dom_family; 1352 fd_putfile(s); 1353 1354 DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom)); 1355 } 1356 1357 #ifdef INET6 1358 /* 1359 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1360 * which lacks the scope id compared with RFC2553 one. If we detect 1361 * the situation, reject the address and write a message to system log. 1362 * 1363 * Still accept addresses for which the scope id is not used. 1364 */ 1365 if (bdom == AF_INET6 && salen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1366 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)kosa; 1367 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1368 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1369 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1370 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1371 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1372 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1373 struct proc *p = l->l_proc; 1374 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1375 1376 log(LOG_DEBUG, 1377 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1378 "sockaddr_in6 rejected", 1379 p->p_pid, p->p_comm, uid); 1380 error = EINVAL; 1381 goto bad; 1382 } 1383 salen = sizeof (struct sockaddr_in6); 1384 sin6->sin6_scope_id = 0; 1385 } 1386 #endif 1387 1388 if (bdom == AF_INET) 1389 salen = sizeof(struct sockaddr_in); 1390 1391 sa = (struct sockaddr *) kosa; 1392 sa->sa_family = bdom; 1393 sa->sa_len = salen; 1394 m->m_len = salen; 1395 ktrkuser("new sockaddr", kosa, salen); 1396 1397 #ifdef DEBUG_LINUX 1398 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1399 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1400 DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom])); 1401 DPRINTF(("\n")); 1402 #endif 1403 1404 *mp = m; 1405 return 0; 1406 1407 bad: 1408 m_free(m); 1409 return error; 1410 } 1411 1412 static int 1413 linux_sa_put(struct osockaddr *osa) 1414 { 1415 struct sockaddr sa; 1416 struct osockaddr *kosa; 1417 int error, bdom, len; 1418 1419 /* 1420 * Only read/write the sockaddr family and length part, the rest is 1421 * not changed. 1422 */ 1423 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1424 1425 error = copyin(osa, &sa, len); 1426 if (error) 1427 return (error); 1428 1429 bdom = bsd_to_linux_domain(sa.sa_family); 1430 if (bdom == -1) 1431 return (EINVAL); 1432 1433 /* Note: we convert from sockaddr to osockaddr here, too */ 1434 kosa = (struct osockaddr *) &sa; 1435 kosa->sa_family = bdom; 1436 error = copyout(kosa, osa, len); 1437 if (error) 1438 return (error); 1439 1440 return (0); 1441 } 1442 1443 #ifndef __amd64__ 1444 int 1445 linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval) 1446 { 1447 /* { 1448 syscallarg(int) s; 1449 syscallarg(void *) buf; 1450 syscallarg(int) len; 1451 syscallarg(int) flags; 1452 } */ 1453 struct sys_recvfrom_args bra; 1454 1455 1456 SCARG(&bra, s) = SCARG(uap, s); 1457 SCARG(&bra, buf) = SCARG(uap, buf); 1458 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1459 SCARG(&bra, flags) = SCARG(uap, flags); 1460 SCARG(&bra, from) = NULL; 1461 SCARG(&bra, fromlenaddr) = NULL; 1462 1463 return (sys_recvfrom(l, &bra, retval)); 1464 } 1465 1466 int 1467 linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval) 1468 { 1469 /* { 1470 syscallarg(int) s; 1471 syscallarg(void *) buf; 1472 syscallarg(int) len; 1473 syscallarg(int) flags; 1474 } */ 1475 struct sys_sendto_args bsa; 1476 1477 SCARG(&bsa, s) = SCARG(uap, s); 1478 SCARG(&bsa, buf) = SCARG(uap, buf); 1479 SCARG(&bsa, len) = SCARG(uap, len); 1480 SCARG(&bsa, flags) = SCARG(uap, flags); 1481 SCARG(&bsa, to) = NULL; 1482 SCARG(&bsa, tolen) = 0; 1483 1484 return (sys_sendto(l, &bsa, retval)); 1485 } 1486 #endif 1487 1488 int 1489 linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval) 1490 { 1491 /* { 1492 syscallarg(int) s; 1493 syscallarg(struct osockaddr *) name; 1494 syscallarg(int *) anamelen; 1495 } */ 1496 int error; 1497 struct sys_accept_args baa; 1498 1499 SCARG(&baa, s) = SCARG(uap, s); 1500 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1501 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1502 1503 if ((error = sys_accept(l, &baa, retval))) 1504 return (error); 1505 1506 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1507 return (error); 1508 1509 return (0); 1510 } 1511