1 /* $NetBSD: linux_socket.c,v 1.86 2008/02/06 21:57:53 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998 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 1.86 2008/02/06 21:57:53 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 proc *p = l->l_proc; 322 struct file *fp; 323 324 if (getsock(p->p_fd, *retval, &fp) == 0) { 325 struct mbuf *m; 326 327 m = m_get(M_WAIT, MT_SOOPTS); 328 m->m_len = sizeof(int); 329 *mtod(m, int *) = 0; 330 331 /* ignore error */ 332 (void) sosetopt((struct socket *)fp->f_data, 333 IPPROTO_IPV6, IPV6_V6ONLY, m); 334 335 FILE_UNUSE(fp, l); 336 } 337 } 338 #endif 339 340 return (error); 341 } 342 343 int 344 linux_sys_socketpair(struct lwp *l, const struct linux_sys_socketpair_args *uap, register_t *retval) 345 { 346 /* { 347 syscallarg(int) domain; 348 syscallarg(int) type; 349 syscallarg(int) protocol; 350 syscallarg(int *) rsv; 351 } */ 352 struct sys_socketpair_args bsa; 353 354 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 355 if (SCARG(&bsa, domain) == -1) 356 return EINVAL; 357 SCARG(&bsa, type) = SCARG(uap, type); 358 SCARG(&bsa, protocol) = SCARG(uap, protocol); 359 SCARG(&bsa, rsv) = SCARG(uap, rsv); 360 361 return sys_socketpair(l, &bsa, retval); 362 } 363 364 int 365 linux_sys_sendto(struct lwp *l, const struct linux_sys_sendto_args *uap, register_t *retval) 366 { 367 /* { 368 syscallarg(int) s; 369 syscallarg(void *) msg; 370 syscallarg(int) len; 371 syscallarg(int) flags; 372 syscallarg(struct osockaddr *) to; 373 syscallarg(int) tolen; 374 } */ 375 struct msghdr msg; 376 struct iovec aiov; 377 struct mbuf *nam; 378 int bflags; 379 int error; 380 381 /* Translate message flags. */ 382 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 383 if (bflags < 0) 384 /* Some supported flag */ 385 return EINVAL; 386 387 /* Read in and convert the sockaddr */ 388 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to), 389 SCARG(uap, tolen)); 390 if (error) 391 return (error); 392 msg.msg_flags = MSG_NAMEMBUF; 393 394 msg.msg_name = nam; 395 msg.msg_namelen = SCARG(uap, tolen); 396 msg.msg_iov = &aiov; 397 msg.msg_iovlen = 1; 398 msg.msg_control = 0; 399 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 400 aiov.iov_len = SCARG(uap, len); 401 402 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 403 } 404 405 int 406 linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval) 407 { 408 /* { 409 syscallarg(int) s; 410 syscallarg(struct msghdr *) msg; 411 syscallarg(u_int) flags; 412 } */ 413 struct msghdr msg; 414 int error; 415 int bflags; 416 struct mbuf *nam; 417 u_int8_t *control; 418 struct mbuf *ctl_mbuf = NULL; 419 420 msg.msg_flags = MSG_IOVUSRSPACE; 421 422 /* 423 * Translate message flags. 424 */ 425 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 426 if (bflags < 0) 427 /* Some supported flag */ 428 return EINVAL; 429 430 if (msg.msg_name) { 431 /* Read in and convert the sockaddr */ 432 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 433 msg.msg_namelen); 434 if (error) 435 return (error); 436 msg.msg_flags |= MSG_NAMEMBUF; 437 msg.msg_name = nam; 438 } 439 440 /* 441 * Handle cmsg if there is any. 442 */ 443 if (CMSG_FIRSTHDR(&msg)) { 444 struct linux_cmsghdr l_cmsg, *l_cc; 445 struct cmsghdr *cmsg; 446 ssize_t resid = msg.msg_controllen; 447 size_t clen, cidx = 0, cspace; 448 449 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 450 clen = MLEN; 451 control = mtod(ctl_mbuf, void *); 452 453 l_cc = LINUX_CMSG_FIRSTHDR(&msg); 454 do { 455 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 456 if (error) 457 goto done; 458 459 /* 460 * Sanity check the control message length. 461 */ 462 if (l_cmsg.cmsg_len > resid 463 || l_cmsg.cmsg_len < sizeof l_cmsg) { 464 error = EINVAL; 465 goto done; 466 } 467 468 /* 469 * Refuse unsupported control messages, and 470 * translate fields as appropriate. 471 */ 472 switch (l_cmsg.cmsg_level) { 473 case LINUX_SOL_SOCKET: 474 /* It only differs on some archs */ 475 if (LINUX_SOL_SOCKET != SOL_SOCKET) 476 l_cmsg.cmsg_level = SOL_SOCKET; 477 478 switch(l_cmsg.cmsg_type) { 479 case LINUX_SCM_RIGHTS: 480 /* Linux SCM_RIGHTS is same as NetBSD */ 481 break; 482 483 default: 484 /* other types not supported */ 485 error = EINVAL; 486 goto done; 487 } 488 break; 489 default: 490 /* pray and leave intact */ 491 break; 492 } 493 494 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 495 496 /* Check the buffer is big enough */ 497 if (__predict_false(cidx + cspace > clen)) { 498 u_int8_t *nc; 499 500 clen = cidx + cspace; 501 if (clen >= PAGE_SIZE) { 502 error = EINVAL; 503 goto done; 504 } 505 nc = realloc(clen <= MLEN ? NULL : control, 506 clen, M_TEMP, M_WAITOK); 507 if (!nc) { 508 error = ENOMEM; 509 goto done; 510 } 511 if (cidx <= MLEN) 512 /* Old buffer was in mbuf... */ 513 memcpy(nc, control, cidx); 514 control = nc; 515 } 516 517 /* Copy header */ 518 cmsg = (void *)&control[cidx]; 519 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 520 cmsg->cmsg_level = l_cmsg.cmsg_level; 521 cmsg->cmsg_type = l_cmsg.cmsg_type; 522 523 /* Zero are between header and data */ 524 memset(cmsg + 1, 0, 525 CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg)); 526 527 /* Copyin the data */ 528 error = copyin(LINUX_CMSG_DATA(l_cc), 529 CMSG_DATA(control), 530 l_cmsg.cmsg_len - sizeof(l_cmsg)); 531 if (error) 532 goto done; 533 534 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 535 cidx += cspace; 536 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 537 538 /* If we allocated a buffer, attach to mbuf */ 539 if (cidx > MLEN) { 540 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 541 ctl_mbuf->m_flags |= M_EXT_RW; 542 } 543 control = NULL; 544 ctl_mbuf->m_len = cidx; 545 546 msg.msg_control = ctl_mbuf; 547 msg.msg_flags |= MSG_CONTROLMBUF; 548 } 549 550 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 551 /* Freed internally */ 552 ctl_mbuf = NULL; 553 554 done: 555 if (ctl_mbuf != NULL) { 556 if (control != NULL && control != mtod(ctl_mbuf, void *)) 557 free(control, M_MBUF); 558 m_free(ctl_mbuf); 559 } 560 return (error); 561 } 562 563 int 564 linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval) 565 { 566 /* { 567 syscallarg(int) s; 568 syscallarg(void *) buf; 569 syscallarg(int) len; 570 syscallarg(int) flags; 571 syscallarg(struct osockaddr *) from; 572 syscallarg(int *) fromlenaddr; 573 } */ 574 int error; 575 struct sys_recvfrom_args bra; 576 577 SCARG(&bra, s) = SCARG(uap, s); 578 SCARG(&bra, buf) = SCARG(uap, buf); 579 SCARG(&bra, len) = SCARG(uap, len); 580 SCARG(&bra, flags) = SCARG(uap, flags); 581 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 582 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 583 584 if ((error = sys_recvfrom(l, &bra, retval))) 585 return (error); 586 587 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 588 return (error); 589 590 return (0); 591 } 592 593 static int 594 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 595 { 596 int dlen, error = 0; 597 struct cmsghdr *cmsg; 598 struct linux_cmsghdr linux_cmsg; 599 struct mbuf *m; 600 char *q, *q_end; 601 602 if (mp->msg_controllen <= 0 || control == 0) { 603 mp->msg_controllen = 0; 604 free_control_mbuf(l, control, control); 605 return 0; 606 } 607 608 q = (char *)mp->msg_control; 609 q_end = q + mp->msg_controllen; 610 611 for (m = control; m != NULL; ) { 612 cmsg = mtod(m, struct cmsghdr *); 613 614 /* 615 * Fixup cmsg. We handle two things: 616 * 0. different sizeof cmsg_len. 617 * 1. different values for level/type on some archs 618 * 2. different alignment of CMSG_DATA on some archs 619 */ 620 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 621 linux_cmsg.cmsg_level = cmsg->cmsg_level; 622 linux_cmsg.cmsg_type = cmsg->cmsg_type; 623 624 dlen = q_end - q; 625 if (linux_cmsg.cmsg_len > dlen) { 626 /* Not enough room for the parameter */ 627 dlen -= sizeof linux_cmsg; 628 if (dlen <= 0) 629 /* Discard if header wont fit */ 630 break; 631 mp->msg_flags |= MSG_CTRUNC; 632 if (linux_cmsg.cmsg_level == SOL_SOCKET 633 && linux_cmsg.cmsg_type == SCM_RIGHTS) 634 /* Do not truncate me ... */ 635 break; 636 } else 637 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 638 639 switch (linux_cmsg.cmsg_level) { 640 case SOL_SOCKET: 641 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 642 switch (linux_cmsg.cmsg_type) { 643 case SCM_RIGHTS: 644 /* Linux SCM_RIGHTS is same as NetBSD */ 645 break; 646 647 default: 648 /* other types not supported */ 649 error = EINVAL; 650 goto done; 651 } 652 /* machine dependant ! */ 653 break; 654 default: 655 /* pray and leave intact */ 656 break; 657 } 658 659 /* There can be padding between the header and data... */ 660 error = copyout(&linux_cmsg, q, sizeof *cmsg); 661 if (error != 0) { 662 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 663 dlen); 664 } 665 if (error != 0) { 666 /* We must free all the SCM_RIGHTS */ 667 m = control; 668 break; 669 } 670 m = m->m_next; 671 if (m == NULL || q + LINUX_CMSG_ALIGN(dlen) > q_end) { 672 q += dlen; 673 break; 674 } 675 q += LINUX_CMSG_ALIGN(dlen); 676 } 677 678 done: 679 free_control_mbuf(l, control, m); 680 681 mp->msg_controllen = q - (char *)mp->msg_control; 682 return error; 683 } 684 685 int 686 linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval) 687 { 688 /* { 689 syscallarg(int) s; 690 syscallarg(struct msghdr *) msg; 691 syscallarg(u_int) flags; 692 } */ 693 struct msghdr msg; 694 int error; 695 struct mbuf *from, *control; 696 697 error = copyin(SCARG(uap, msg), &msg, sizeof(msg)); 698 if (error) 699 return (error); 700 701 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 702 if (msg.msg_flags < 0) { 703 /* Some unsupported flag */ 704 return (EINVAL); 705 } 706 msg.msg_flags |= MSG_IOVUSRSPACE; 707 708 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 709 msg.msg_control != NULL ? &control : NULL, retval); 710 if (error != 0) 711 return error; 712 713 if (msg.msg_control != NULL) 714 error = linux_copyout_msg_control(l, &msg, control); 715 716 if (error == 0 && from != 0) { 717 mtod(from, struct osockaddr *)->sa_family = 718 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 719 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 720 from); 721 } else 722 msg.msg_namelen = 0; 723 724 if (from != NULL) 725 m_free(from); 726 727 if (error == 0) { 728 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 729 if (msg.msg_flags < 0) 730 /* Some flag unsupported by Linux */ 731 error = EINVAL; 732 else 733 error = copyout(&msg, SCARG(uap, msg), sizeof(msg)); 734 } 735 736 return (error); 737 } 738 739 /* 740 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 741 * is different, the rest matches IPPROTO_* on both systems. 742 */ 743 int 744 linux_to_bsd_sopt_level(int llevel) 745 { 746 747 switch (llevel) { 748 case LINUX_SOL_SOCKET: 749 return SOL_SOCKET; 750 case LINUX_SOL_IP: 751 return IPPROTO_IP; 752 case LINUX_SOL_TCP: 753 return IPPROTO_TCP; 754 case LINUX_SOL_UDP: 755 return IPPROTO_UDP; 756 default: 757 return -1; 758 } 759 } 760 761 /* 762 * Convert Linux socket level socket option numbers to NetBSD values. 763 */ 764 int 765 linux_to_bsd_so_sockopt(int lopt) 766 { 767 768 switch (lopt) { 769 case LINUX_SO_DEBUG: 770 return SO_DEBUG; 771 case LINUX_SO_REUSEADDR: 772 /* 773 * Linux does not implement SO_REUSEPORT, but allows reuse of a 774 * host:port pair through SO_REUSEADDR even if the address is not a 775 * multicast-address. Effectively, this means that we should use 776 * SO_REUSEPORT to allow Linux applications to not exit with 777 * EADDRINUSE 778 */ 779 return SO_REUSEPORT; 780 case LINUX_SO_TYPE: 781 return SO_TYPE; 782 case LINUX_SO_ERROR: 783 return SO_ERROR; 784 case LINUX_SO_DONTROUTE: 785 return SO_DONTROUTE; 786 case LINUX_SO_BROADCAST: 787 return SO_BROADCAST; 788 case LINUX_SO_SNDBUF: 789 return SO_SNDBUF; 790 case LINUX_SO_RCVBUF: 791 return SO_RCVBUF; 792 case LINUX_SO_KEEPALIVE: 793 return SO_KEEPALIVE; 794 case LINUX_SO_OOBINLINE: 795 return SO_OOBINLINE; 796 case LINUX_SO_LINGER: 797 return SO_LINGER; 798 case LINUX_SO_PRIORITY: 799 case LINUX_SO_NO_CHECK: 800 default: 801 return -1; 802 } 803 } 804 805 /* 806 * Convert Linux IP level socket option number to NetBSD values. 807 */ 808 int 809 linux_to_bsd_ip_sockopt(int lopt) 810 { 811 812 switch (lopt) { 813 case LINUX_IP_TOS: 814 return IP_TOS; 815 case LINUX_IP_TTL: 816 return IP_TTL; 817 case LINUX_IP_MULTICAST_TTL: 818 return IP_MULTICAST_TTL; 819 case LINUX_IP_MULTICAST_LOOP: 820 return IP_MULTICAST_LOOP; 821 case LINUX_IP_MULTICAST_IF: 822 return IP_MULTICAST_IF; 823 case LINUX_IP_ADD_MEMBERSHIP: 824 return IP_ADD_MEMBERSHIP; 825 case LINUX_IP_DROP_MEMBERSHIP: 826 return IP_DROP_MEMBERSHIP; 827 default: 828 return -1; 829 } 830 } 831 832 /* 833 * Convert Linux TCP level socket option number to NetBSD values. 834 */ 835 int 836 linux_to_bsd_tcp_sockopt(int lopt) 837 { 838 839 switch (lopt) { 840 case LINUX_TCP_NODELAY: 841 return TCP_NODELAY; 842 case LINUX_TCP_MAXSEG: 843 return TCP_MAXSEG; 844 default: 845 return -1; 846 } 847 } 848 849 /* 850 * Convert Linux UDP level socket option number to NetBSD values. 851 */ 852 int 853 linux_to_bsd_udp_sockopt(int lopt) 854 { 855 856 switch (lopt) { 857 default: 858 return -1; 859 } 860 } 861 862 /* 863 * Another reasonably straightforward function: setsockopt(2). 864 * The level and option numbers are converted; the values passed 865 * are not (yet) converted, the ones currently implemented don't 866 * need conversion, as they are the same on both systems. 867 */ 868 int 869 linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval) 870 { 871 /* { 872 syscallarg(int) s; 873 syscallarg(int) level; 874 syscallarg(int) optname; 875 syscallarg(void *) optval; 876 syscallarg(int) optlen; 877 } */ 878 struct proc *p = l->l_proc; 879 struct sys_setsockopt_args bsa; 880 int name; 881 882 SCARG(&bsa, s) = SCARG(uap, s); 883 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 884 SCARG(&bsa, val) = SCARG(uap, optval); 885 SCARG(&bsa, valsize) = SCARG(uap, optlen); 886 887 /* 888 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 889 * and returns EOPNOTSUPP for other levels 890 */ 891 if (SCARG(&bsa, level) != SOL_SOCKET) { 892 struct file *fp; 893 struct socket *so; 894 int error, s, family; 895 896 /* getsock() will use the descriptor for us */ 897 if ((error = getsock(p->p_fd, SCARG(&bsa, s), &fp)) != 0) 898 return error; 899 900 s = splsoftnet(); 901 so = (struct socket *)fp->f_data; 902 family = so->so_proto->pr_domain->dom_family; 903 splx(s); 904 FILE_UNUSE(fp, l); 905 906 if (family == AF_LOCAL) 907 return EOPNOTSUPP; 908 } 909 910 switch (SCARG(&bsa, level)) { 911 case SOL_SOCKET: 912 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 913 break; 914 case IPPROTO_IP: 915 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 916 break; 917 case IPPROTO_TCP: 918 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 919 break; 920 case IPPROTO_UDP: 921 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 922 break; 923 default: 924 return EINVAL; 925 } 926 927 if (name == -1) 928 return EINVAL; 929 SCARG(&bsa, name) = name; 930 931 return sys_setsockopt(l, &bsa, retval); 932 } 933 934 /* 935 * getsockopt(2) is very much the same as setsockopt(2) (see above) 936 */ 937 int 938 linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval) 939 { 940 /* { 941 syscallarg(int) s; 942 syscallarg(int) level; 943 syscallarg(int) optname; 944 syscallarg(void *) optval; 945 syscallarg(int *) optlen; 946 } */ 947 struct sys_getsockopt_args bga; 948 int name; 949 950 SCARG(&bga, s) = SCARG(uap, s); 951 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 952 SCARG(&bga, val) = SCARG(uap, optval); 953 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 954 955 switch (SCARG(&bga, level)) { 956 case SOL_SOCKET: 957 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 958 break; 959 case IPPROTO_IP: 960 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 961 break; 962 case IPPROTO_TCP: 963 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 964 break; 965 case IPPROTO_UDP: 966 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 967 break; 968 default: 969 return EINVAL; 970 } 971 972 if (name == -1) 973 return EINVAL; 974 SCARG(&bga, name) = name; 975 976 return sys_getsockopt(l, &bga, retval); 977 } 978 979 #define IF_NAME_LEN 16 980 981 int 982 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 983 void *data) 984 { 985 /* Not the full structure, just enough to map what we do here */ 986 struct linux_ifreq { 987 char if_name[IF_NAME_LEN]; 988 struct osockaddr hwaddr; 989 } lreq; 990 struct proc *p = l->l_proc; 991 struct filedesc *fdp; 992 struct file *fp; 993 struct ifaddr *ifa; 994 struct ifnet *ifp; 995 struct sockaddr_dl *sadl; 996 int error, found; 997 int index, ifnum; 998 999 /* 1000 * We can't emulate this ioctl by calling sys_ioctl() to run 1001 * SIOCGIFCONF, because the user buffer is not of the right 1002 * type to take those results. We can't use kernel buffers to 1003 * receive the results, as the implementation of sys_ioctl() 1004 * and ifconf() [which implements SIOCGIFCONF] use 1005 * copyin()/copyout() which will fail on kernel addresses. 1006 * 1007 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1008 */ 1009 1010 fdp = p->p_fd; 1011 if ((fp = fd_getfile(fdp, fd)) == NULL) 1012 return (EBADF); 1013 1014 FILE_USE(fp); 1015 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1016 error = EBADF; 1017 goto out; 1018 } 1019 1020 error = copyin(data, &lreq, sizeof(lreq)); 1021 if (error) 1022 goto out; 1023 lreq.if_name[IF_NAME_LEN-1] = '\0'; /* just in case */ 1024 1025 /* 1026 * Try real interface name first, then fake "ethX" 1027 */ 1028 found = 0; 1029 IFNET_FOREACH(ifp) { 1030 if (found) 1031 break; 1032 if (strcmp(lreq.if_name, ifp->if_xname)) 1033 /* not this interface */ 1034 continue; 1035 found=1; 1036 if (IFADDR_EMPTY(ifp)) { 1037 error = ENODEV; 1038 goto out; 1039 } 1040 IFADDR_FOREACH(ifa, ifp) { 1041 sadl = satosdl(ifa->ifa_addr); 1042 /* only return ethernet addresses */ 1043 /* XXX what about FDDI, etc. ? */ 1044 if (sadl->sdl_family != AF_LINK || 1045 sadl->sdl_type != IFT_ETHER) 1046 continue; 1047 memcpy(&lreq.hwaddr.sa_data, CLLADDR(sadl), 1048 MIN(sadl->sdl_alen, 1049 sizeof(lreq.hwaddr.sa_data))); 1050 lreq.hwaddr.sa_family = 1051 sadl->sdl_family; 1052 error = copyout(&lreq, data, sizeof(lreq)); 1053 goto out; 1054 } 1055 } 1056 1057 if (strncmp(lreq.if_name, "eth", 3) == 0) { 1058 for (ifnum = 0, index = 3; 1059 lreq.if_name[index] != '\0' && index < IF_NAME_LEN; 1060 index++) { 1061 ifnum *= 10; 1062 ifnum += lreq.if_name[index] - '0'; 1063 } 1064 1065 error = EINVAL; /* in case we don't find one */ 1066 found = 0; 1067 IFNET_FOREACH(ifp) { 1068 if (found) 1069 break; 1070 memcpy(lreq.if_name, ifp->if_xname, 1071 MIN(IF_NAME_LEN, IFNAMSIZ)); 1072 IFADDR_FOREACH(ifa, ifp) { 1073 sadl = satosdl(ifa->ifa_addr); 1074 /* only return ethernet addresses */ 1075 /* XXX what about FDDI, etc. ? */ 1076 if (sadl->sdl_family != AF_LINK || 1077 sadl->sdl_type != IFT_ETHER) 1078 continue; 1079 if (ifnum--) 1080 /* not the reqested iface */ 1081 continue; 1082 memcpy(&lreq.hwaddr.sa_data, 1083 CLLADDR(sadl), 1084 MIN(sadl->sdl_alen, 1085 sizeof(lreq.hwaddr.sa_data))); 1086 lreq.hwaddr.sa_family = 1087 sadl->sdl_family; 1088 error = copyout(&lreq, data, sizeof(lreq)); 1089 found = 1; 1090 break; 1091 } 1092 } 1093 } else { 1094 /* unknown interface, not even an "eth*" name */ 1095 error = ENODEV; 1096 } 1097 1098 out: 1099 FILE_UNUSE(fp, l); 1100 return error; 1101 } 1102 #undef IF_NAME_LEN 1103 1104 int 1105 linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) 1106 { 1107 /* { 1108 syscallarg(int) fd; 1109 syscallarg(u_long) com; 1110 syscallarg(void *) data; 1111 } */ 1112 struct proc *p = l->l_proc; 1113 u_long com; 1114 int error = 0, isdev = 0, dosys = 1; 1115 struct sys_ioctl_args ia; 1116 struct file *fp; 1117 struct filedesc *fdp; 1118 struct vnode *vp; 1119 int (*ioctlf)(struct file *, u_long, void *, struct lwp *); 1120 struct ioctl_pt pt; 1121 1122 fdp = p->p_fd; 1123 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1124 return (EBADF); 1125 1126 FILE_USE(fp); 1127 1128 if (fp->f_type == DTYPE_VNODE) { 1129 vp = (struct vnode *)fp->f_data; 1130 isdev = vp->v_type == VCHR; 1131 } 1132 1133 /* 1134 * Don't try to interpret socket ioctl calls that are done 1135 * on a device filedescriptor, just pass them through, to 1136 * emulate Linux behaviour. Use PTIOCLINUX so that the 1137 * device will only handle these if it's prepared to do 1138 * so, to avoid unexpected things from happening. 1139 */ 1140 if (isdev) { 1141 dosys = 0; 1142 ioctlf = fp->f_ops->fo_ioctl; 1143 pt.com = SCARG(uap, com); 1144 pt.data = SCARG(uap, data); 1145 error = ioctlf(fp, PTIOCLINUX, (void *)&pt, l); 1146 /* 1147 * XXX hack: if the function returns EJUSTRETURN, 1148 * it has stuffed a sysctl return value in pt.data. 1149 */ 1150 if (error == EJUSTRETURN) { 1151 retval[0] = (register_t)pt.data; 1152 error = 0; 1153 } 1154 goto out; 1155 } 1156 1157 com = SCARG(uap, com); 1158 retval[0] = 0; 1159 1160 switch (com) { 1161 case LINUX_SIOCGIFCONF: 1162 SCARG(&ia, com) = OOSIOCGIFCONF; 1163 break; 1164 case LINUX_SIOCGIFFLAGS: 1165 SCARG(&ia, com) = OSIOCGIFFLAGS; 1166 break; 1167 case LINUX_SIOCSIFFLAGS: 1168 SCARG(&ia, com) = OSIOCSIFFLAGS; 1169 break; 1170 case LINUX_SIOCGIFADDR: 1171 SCARG(&ia, com) = OOSIOCGIFADDR; 1172 break; 1173 case LINUX_SIOCGIFDSTADDR: 1174 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1175 break; 1176 case LINUX_SIOCGIFBRDADDR: 1177 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1178 break; 1179 case LINUX_SIOCGIFNETMASK: 1180 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1181 break; 1182 case LINUX_SIOCADDMULTI: 1183 SCARG(&ia, com) = OSIOCADDMULTI; 1184 break; 1185 case LINUX_SIOCDELMULTI: 1186 SCARG(&ia, com) = OSIOCDELMULTI; 1187 break; 1188 case LINUX_SIOCGIFHWADDR: 1189 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1190 SCARG(uap, data)); 1191 dosys = 0; 1192 break; 1193 default: 1194 error = EINVAL; 1195 } 1196 1197 out: 1198 FILE_UNUSE(fp, l); 1199 1200 if (error ==0 && dosys) { 1201 SCARG(&ia, fd) = SCARG(uap, fd); 1202 SCARG(&ia, data) = SCARG(uap, data); 1203 /* XXX NJWLWP */ 1204 error = sys_ioctl(curlwp, &ia, retval); 1205 } 1206 1207 return error; 1208 } 1209 1210 int 1211 linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval) 1212 { 1213 /* { 1214 syscallarg(int) s; 1215 syscallarg(const struct sockaddr *) name; 1216 syscallarg(int) namelen; 1217 } */ 1218 int error; 1219 struct mbuf *nam; 1220 1221 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1222 SCARG(uap, namelen)); 1223 if (error) 1224 return (error); 1225 1226 error = do_sys_connect(l, SCARG(uap, s), nam); 1227 1228 if (error == EISCONN) { 1229 struct file *fp; 1230 struct socket *so; 1231 int s, state, prflags, nbio; 1232 1233 /* getsock() will use the descriptor for us */ 1234 if (getsock(l->l_proc->p_fd, SCARG(uap, s), &fp) != 0) 1235 return EISCONN; 1236 1237 s = splsoftnet(); 1238 so = (struct socket *)fp->f_data; 1239 state = so->so_state; 1240 nbio = so->so_nbio; 1241 prflags = so->so_proto->pr_flags; 1242 splx(s); 1243 FILE_UNUSE(fp, l); 1244 /* 1245 * We should only let this call succeed once per 1246 * non-blocking connect; however we don't have 1247 * a convenient place to keep that state.. 1248 */ 1249 if (nbio && (state & SS_ISCONNECTED) && 1250 (prflags & PR_CONNREQUIRED)) 1251 return 0; 1252 } 1253 1254 return (error); 1255 } 1256 1257 int 1258 linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval) 1259 { 1260 /* { 1261 syscallarg(int) s; 1262 syscallarg(const struct osockaddr *) name; 1263 syscallarg(int) namelen; 1264 } */ 1265 int error; 1266 struct mbuf *nam; 1267 1268 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1269 SCARG(uap, namelen)); 1270 if (error) 1271 return (error); 1272 1273 return do_sys_bind(l, SCARG(uap, s), nam); 1274 } 1275 1276 int 1277 linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval) 1278 { 1279 /* { 1280 syscallarg(int) fdes; 1281 syscallarg(void *) asa; 1282 syscallarg(int *) alen; 1283 } */ 1284 int error; 1285 1286 if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0) 1287 return (error); 1288 1289 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1290 return (error); 1291 1292 return (0); 1293 } 1294 1295 int 1296 linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval) 1297 { 1298 /* { 1299 syscallarg(int) fdes; 1300 syscallarg(void *) asa; 1301 syscallarg(int *) alen; 1302 } */ 1303 int error; 1304 1305 if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0) 1306 return (error); 1307 1308 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1309 return (error); 1310 1311 return (0); 1312 } 1313 1314 /* 1315 * Copy the osockaddr structure pointed to by osa to mbuf, adjust 1316 * family and convert to sockaddr. 1317 */ 1318 static int 1319 linux_get_sa(struct lwp *l, int s, struct mbuf **mp, const struct osockaddr *osa, int salen) 1320 { 1321 int error, bdom; 1322 struct sockaddr *sa; 1323 struct osockaddr *kosa; 1324 struct mbuf *m; 1325 1326 if (salen == 1 || salen > UCHAR_MAX) { 1327 DPRINTF(("bad osa=%p salen=%d\n", osa, salen)); 1328 return EINVAL; 1329 } 1330 1331 /* We'll need the address in an mbuf later, so copy into one here */ 1332 m = m_get(M_WAIT, MT_SONAME); 1333 if (salen > MLEN) 1334 MEXTMALLOC(m, salen, M_WAITOK); 1335 1336 m->m_len = salen; 1337 1338 if (salen == 0) 1339 return 0; 1340 1341 kosa = mtod(m, void *); 1342 if ((error = copyin(osa, kosa, salen))) { 1343 DPRINTF(("error %d copying osa %p len %d\n", 1344 error, osa, salen)); 1345 goto bad; 1346 } 1347 1348 ktrkuser("linux sockaddr", kosa, salen); 1349 1350 bdom = linux_to_bsd_domain(kosa->sa_family); 1351 if (bdom == -1) { 1352 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1353 error = EINVAL; 1354 goto bad; 1355 } 1356 1357 /* 1358 * If the family is unspecified, use address family of the socket. 1359 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1360 */ 1361 if (bdom == AF_UNSPEC) { 1362 struct file *fp; 1363 struct socket *so; 1364 1365 /* getsock() will use the descriptor for us */ 1366 if ((error = getsock(l->l_proc->p_fd, s, &fp)) != 0) 1367 goto bad; 1368 1369 so = (struct socket *)fp->f_data; 1370 bdom = so->so_proto->pr_domain->dom_family; 1371 1372 FILE_UNUSE(fp, l); 1373 1374 DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom)); 1375 } 1376 1377 #ifdef INET6 1378 /* 1379 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1380 * which lacks the scope id compared with RFC2553 one. If we detect 1381 * the situation, reject the address and write a message to system log. 1382 * 1383 * Still accept addresses for which the scope id is not used. 1384 */ 1385 if (bdom == AF_INET6 && salen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1386 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)kosa; 1387 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1388 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1389 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1390 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1391 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1392 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1393 struct proc *p = l->l_proc; 1394 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1395 1396 log(LOG_DEBUG, 1397 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1398 "sockaddr_in6 rejected", 1399 p->p_pid, p->p_comm, uid); 1400 error = EINVAL; 1401 goto bad; 1402 } 1403 salen = sizeof (struct sockaddr_in6); 1404 sin6->sin6_scope_id = 0; 1405 } 1406 #endif 1407 1408 if (bdom == AF_INET) 1409 salen = sizeof(struct sockaddr_in); 1410 1411 sa = (struct sockaddr *) kosa; 1412 sa->sa_family = bdom; 1413 sa->sa_len = salen; 1414 m->m_len = salen; 1415 ktrkuser("new sockaddr", kosa, salen); 1416 1417 #ifdef DEBUG_LINUX 1418 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1419 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1420 DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom])); 1421 DPRINTF(("\n")); 1422 #endif 1423 1424 *mp = m; 1425 return 0; 1426 1427 bad: 1428 m_free(m); 1429 return error; 1430 } 1431 1432 static int 1433 linux_sa_put(struct osockaddr *osa) 1434 { 1435 struct sockaddr sa; 1436 struct osockaddr *kosa; 1437 int error, bdom, len; 1438 1439 /* 1440 * Only read/write the sockaddr family and length part, the rest is 1441 * not changed. 1442 */ 1443 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1444 1445 error = copyin(osa, &sa, len); 1446 if (error) 1447 return (error); 1448 1449 bdom = bsd_to_linux_domain(sa.sa_family); 1450 if (bdom == -1) 1451 return (EINVAL); 1452 1453 /* Note: we convert from sockaddr to osockaddr here, too */ 1454 kosa = (struct osockaddr *) &sa; 1455 kosa->sa_family = bdom; 1456 error = copyout(kosa, osa, len); 1457 if (error) 1458 return (error); 1459 1460 return (0); 1461 } 1462 1463 #ifndef __amd64__ 1464 int 1465 linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval) 1466 { 1467 /* { 1468 syscallarg(int) s; 1469 syscallarg(void *) buf; 1470 syscallarg(int) len; 1471 syscallarg(int) flags; 1472 } */ 1473 struct sys_recvfrom_args bra; 1474 1475 1476 SCARG(&bra, s) = SCARG(uap, s); 1477 SCARG(&bra, buf) = SCARG(uap, buf); 1478 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1479 SCARG(&bra, flags) = SCARG(uap, flags); 1480 SCARG(&bra, from) = NULL; 1481 SCARG(&bra, fromlenaddr) = NULL; 1482 1483 return (sys_recvfrom(l, &bra, retval)); 1484 } 1485 1486 int 1487 linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval) 1488 { 1489 /* { 1490 syscallarg(int) s; 1491 syscallarg(void *) buf; 1492 syscallarg(int) len; 1493 syscallarg(int) flags; 1494 } */ 1495 struct sys_sendto_args bsa; 1496 1497 SCARG(&bsa, s) = SCARG(uap, s); 1498 SCARG(&bsa, buf) = SCARG(uap, buf); 1499 SCARG(&bsa, len) = SCARG(uap, len); 1500 SCARG(&bsa, flags) = SCARG(uap, flags); 1501 SCARG(&bsa, to) = NULL; 1502 SCARG(&bsa, tolen) = 0; 1503 1504 return (sys_sendto(l, &bsa, retval)); 1505 } 1506 #endif 1507 1508 int 1509 linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval) 1510 { 1511 /* { 1512 syscallarg(int) s; 1513 syscallarg(struct osockaddr *) name; 1514 syscallarg(int *) anamelen; 1515 } */ 1516 int error; 1517 struct sys_accept_args baa; 1518 1519 SCARG(&baa, s) = SCARG(uap, s); 1520 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1521 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1522 1523 if ((error = sys_accept(l, &baa, retval))) 1524 return (error); 1525 1526 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1527 return (error); 1528 1529 return (0); 1530 } 1531