1 /* $NetBSD: linux_socket.c,v 1.84 2007/12/08 18:36:10 dsl 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 1.84 2007/12/08 18:36:10 dsl 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 79 #include <sys/syscallargs.h> 80 #include <sys/ktrace.h> 81 82 #include <lib/libkern/libkern.h> 83 84 #ifdef INET6 85 #include <netinet/ip6.h> 86 #include <netinet6/ip6_var.h> 87 #endif 88 89 #include <compat/sys/socket.h> 90 #include <compat/sys/sockio.h> 91 92 #include <compat/linux/common/linux_types.h> 93 #include <compat/linux/common/linux_util.h> 94 #include <compat/linux/common/linux_signal.h> 95 #include <compat/linux/common/linux_ioctl.h> 96 #include <compat/linux/common/linux_socket.h> 97 #if !defined(__alpha__) && !defined(__amd64__) 98 #include <compat/linux/common/linux_socketcall.h> 99 #endif 100 #include <compat/linux/common/linux_sockio.h> 101 #include <compat/linux/common/linux_ipc.h> 102 #include <compat/linux/common/linux_sem.h> 103 104 #include <compat/linux/linux_syscallargs.h> 105 106 #ifdef DEBUG_LINUX 107 #define DPRINTF(a) uprintf a 108 #else 109 #define DPRINTF(a) 110 #endif 111 112 /* 113 * The calls in this file are entered either via the linux_socketcall() 114 * interface or, on the Alpha, as individual syscalls. The 115 * linux_socketcall function does any massaging of arguments so that all 116 * the calls in here need not think that they are anything other 117 * than a normal syscall. 118 */ 119 120 static int linux_to_bsd_domain(int); 121 static int bsd_to_linux_domain(int); 122 int linux_to_bsd_sopt_level(int); 123 int linux_to_bsd_so_sockopt(int); 124 int linux_to_bsd_ip_sockopt(int); 125 int linux_to_bsd_tcp_sockopt(int); 126 int linux_to_bsd_udp_sockopt(int); 127 int linux_getifhwaddr(struct lwp *, register_t *, u_int, void *); 128 static int linux_get_sa(struct lwp *, int, struct mbuf **, 129 const struct osockaddr *, int); 130 static int linux_sa_put(struct osockaddr *osa); 131 static int linux_to_bsd_msg_flags(int); 132 static int bsd_to_linux_msg_flags(int); 133 134 static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { 135 AF_UNSPEC, 136 AF_UNIX, 137 AF_INET, 138 AF_CCITT, /* LINUX_AF_AX25 */ 139 AF_IPX, 140 AF_APPLETALK, 141 -1, /* LINUX_AF_NETROM */ 142 -1, /* LINUX_AF_BRIDGE */ 143 -1, /* LINUX_AF_ATMPVC */ 144 AF_CCITT, /* LINUX_AF_X25 */ 145 AF_INET6, 146 -1, /* LINUX_AF_ROSE */ 147 AF_DECnet, 148 -1, /* LINUX_AF_NETBEUI */ 149 -1, /* LINUX_AF_SECURITY */ 150 pseudo_AF_KEY, 151 AF_ROUTE, /* LINUX_AF_NETLINK */ 152 -1, /* LINUX_AF_PACKET */ 153 -1, /* LINUX_AF_ASH */ 154 -1, /* LINUX_AF_ECONET */ 155 -1, /* LINUX_AF_ATMSVC */ 156 AF_SNA, 157 /* rest up to LINUX_AF_MAX-1 is not allocated */ 158 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 159 }; 160 161 static const int bsd_to_linux_domain_[AF_MAX] = { 162 LINUX_AF_UNSPEC, 163 LINUX_AF_UNIX, 164 LINUX_AF_INET, 165 -1, /* AF_IMPLINK */ 166 -1, /* AF_PUP */ 167 -1, /* AF_CHAOS */ 168 -1, /* AF_NS */ 169 -1, /* AF_ISO */ 170 -1, /* AF_ECMA */ 171 -1, /* AF_DATAKIT */ 172 LINUX_AF_AX25, /* AF_CCITT */ 173 LINUX_AF_SNA, 174 LINUX_AF_DECnet, 175 -1, /* AF_DLI */ 176 -1, /* AF_LAT */ 177 -1, /* AF_HYLINK */ 178 LINUX_AF_APPLETALK, 179 LINUX_AF_NETLINK, 180 -1, /* AF_LINK */ 181 -1, /* AF_XTP */ 182 -1, /* AF_COIP */ 183 -1, /* AF_CNT */ 184 -1, /* pseudo_AF_RTIP */ 185 LINUX_AF_IPX, 186 LINUX_AF_INET6, 187 -1, /* pseudo_AF_PIP */ 188 -1, /* AF_ISDN */ 189 -1, /* AF_NATM */ 190 -1, /* AF_ARP */ 191 LINUX_pseudo_AF_KEY, 192 -1, /* pseudo_AF_HDRCMPLT */ 193 }; 194 195 static const struct { 196 int bfl; 197 int lfl; 198 } bsd_to_linux_msg_flags_[] = { 199 {MSG_OOB, LINUX_MSG_OOB}, 200 {MSG_PEEK, LINUX_MSG_PEEK}, 201 {MSG_DONTROUTE, LINUX_MSG_DONTROUTE}, 202 {MSG_EOR, LINUX_MSG_EOR}, 203 {MSG_TRUNC, LINUX_MSG_TRUNC}, 204 {MSG_CTRUNC, LINUX_MSG_CTRUNC}, 205 {MSG_WAITALL, LINUX_MSG_WAITALL}, 206 {MSG_DONTWAIT, LINUX_MSG_DONTWAIT}, 207 {MSG_BCAST, 0}, /* not supported, clear */ 208 {MSG_MCAST, 0}, /* not supported, clear */ 209 {-1, /* not supp */ LINUX_MSG_PROBE}, 210 {-1, /* not supp */ LINUX_MSG_FIN}, 211 {-1, /* not supp */ LINUX_MSG_SYN}, 212 {-1, /* not supp */ LINUX_MSG_CONFIRM}, 213 {-1, /* not supp */ LINUX_MSG_RST}, 214 {-1, /* not supp */ LINUX_MSG_ERRQUEUE}, 215 {-1, /* not supp */ LINUX_MSG_NOSIGNAL}, 216 {-1, /* not supp */ LINUX_MSG_MORE}, 217 }; 218 219 /* 220 * Convert between Linux and BSD socket domain values 221 */ 222 static int 223 linux_to_bsd_domain(int ldom) 224 { 225 if (ldom < 0 || ldom >= LINUX_AF_MAX) 226 return (-1); 227 228 return linux_to_bsd_domain_[ldom]; 229 } 230 231 /* 232 * Convert between BSD and Linux socket domain values 233 */ 234 static int 235 bsd_to_linux_domain(int bdom) 236 { 237 if (bdom < 0 || bdom >= AF_MAX) 238 return (-1); 239 240 return bsd_to_linux_domain_[bdom]; 241 } 242 243 static int 244 linux_to_bsd_msg_flags(int lflag) 245 { 246 int i, lfl, bfl; 247 int bflag = 0; 248 249 if (lflag == 0) 250 return (0); 251 252 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 253 bfl = bsd_to_linux_msg_flags_[i].bfl; 254 lfl = bsd_to_linux_msg_flags_[i].lfl; 255 256 if (lfl == 0) 257 continue; 258 259 if (lflag & lfl) { 260 if (bfl < 0) 261 return (-1); 262 263 bflag |= bfl; 264 } 265 } 266 267 return (bflag); 268 } 269 270 static int 271 bsd_to_linux_msg_flags(int bflag) 272 { 273 int i, lfl, bfl; 274 int lflag = 0; 275 276 if (bflag == 0) 277 return (0); 278 279 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 280 bfl = bsd_to_linux_msg_flags_[i].bfl; 281 lfl = bsd_to_linux_msg_flags_[i].lfl; 282 283 if (bfl <= 0) 284 continue; 285 286 if (bflag & bfl) { 287 if (lfl < 0) 288 return (-1); 289 290 lflag |= lfl; 291 } 292 } 293 294 return (lflag); 295 } 296 297 int 298 linux_sys_socket(struct lwp *l, void *v, register_t *retval) 299 { 300 struct linux_sys_socket_args /* { 301 syscallarg(int) domain; 302 syscallarg(int) type; 303 syscallarg(int) protocol; 304 } */ *uap = v; 305 struct compat_30_sys_socket_args bsa; 306 int error; 307 308 SCARG(&bsa, protocol) = SCARG(uap, protocol); 309 SCARG(&bsa, type) = SCARG(uap, type); 310 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 311 if (SCARG(&bsa, domain) == -1) 312 return EINVAL; 313 error = sys___socket30(l, &bsa, retval); 314 315 #ifdef INET6 316 /* 317 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 318 * default and some apps depend on this. So, set V6ONLY to 0 319 * for Linux apps if the sysctl value is set to 1. 320 */ 321 if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { 322 struct proc *p = l->l_proc; 323 struct file *fp; 324 325 if (getsock(p->p_fd, *retval, &fp) == 0) { 326 struct mbuf *m; 327 328 m = m_get(M_WAIT, MT_SOOPTS); 329 m->m_len = sizeof(int); 330 *mtod(m, int *) = 0; 331 332 /* ignore error */ 333 (void) sosetopt((struct socket *)fp->f_data, 334 IPPROTO_IPV6, IPV6_V6ONLY, m); 335 336 FILE_UNUSE(fp, l); 337 } 338 } 339 #endif 340 341 return (error); 342 } 343 344 int 345 linux_sys_socketpair(struct lwp *l, void *v, register_t *retval) 346 { 347 struct linux_sys_socketpair_args /* { 348 syscallarg(int) domain; 349 syscallarg(int) type; 350 syscallarg(int) protocol; 351 syscallarg(int *) rsv; 352 } */ *uap = v; 353 struct sys_socketpair_args bsa; 354 355 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 356 if (SCARG(&bsa, domain) == -1) 357 return EINVAL; 358 SCARG(&bsa, type) = SCARG(uap, type); 359 SCARG(&bsa, protocol) = SCARG(uap, protocol); 360 SCARG(&bsa, rsv) = SCARG(uap, rsv); 361 362 return sys_socketpair(l, &bsa, retval); 363 } 364 365 int 366 linux_sys_sendto(struct lwp *l, void *v, register_t *retval) 367 { 368 struct linux_sys_sendto_args /* { 369 syscallarg(int) s; 370 syscallarg(void *) msg; 371 syscallarg(int) len; 372 syscallarg(int) flags; 373 syscallarg(struct osockaddr *) to; 374 syscallarg(int) tolen; 375 } */ *uap = v; 376 struct msghdr msg; 377 struct iovec aiov; 378 struct mbuf *nam; 379 int bflags; 380 int error; 381 382 /* Translate message flags. */ 383 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 384 if (bflags < 0) 385 /* Some supported flag */ 386 return EINVAL; 387 388 /* Read in and convert the sockaddr */ 389 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to), 390 SCARG(uap, tolen)); 391 if (error) 392 return (error); 393 msg.msg_flags = MSG_NAMEMBUF; 394 395 msg.msg_name = nam; 396 msg.msg_namelen = SCARG(uap, tolen); 397 msg.msg_iov = &aiov; 398 msg.msg_iovlen = 1; 399 msg.msg_control = 0; 400 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 401 aiov.iov_len = SCARG(uap, len); 402 403 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 404 } 405 406 int 407 linux_sys_sendmsg(struct lwp *l, void *v, register_t *retval) 408 { 409 struct linux_sys_sendmsg_args /* { 410 syscallarg(int) s; 411 syscallarg(struct msghdr *) msg; 412 syscallarg(u_int) flags; 413 } */ *uap = v; 414 struct msghdr msg; 415 int error; 416 int bflags; 417 struct mbuf *nam; 418 u_int8_t *control; 419 struct mbuf *ctl_mbuf = NULL; 420 421 msg.msg_flags = MSG_IOVUSRSPACE; 422 423 /* 424 * Translate message flags. 425 */ 426 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 427 if (bflags < 0) 428 /* Some supported flag */ 429 return EINVAL; 430 431 if (msg.msg_name) { 432 /* Read in and convert the sockaddr */ 433 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 434 msg.msg_namelen); 435 if (error) 436 return (error); 437 msg.msg_flags |= MSG_NAMEMBUF; 438 msg.msg_name = nam; 439 } 440 441 /* 442 * Handle cmsg if there is any. 443 */ 444 if (CMSG_FIRSTHDR(&msg)) { 445 struct linux_cmsghdr l_cmsg, *l_cc; 446 struct cmsghdr *cmsg; 447 ssize_t resid = msg.msg_controllen; 448 size_t clen, cidx = 0, cspace; 449 450 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 451 clen = MLEN; 452 control = mtod(ctl_mbuf, void *); 453 454 l_cc = LINUX_CMSG_FIRSTHDR(&msg); 455 do { 456 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 457 if (error) 458 goto done; 459 460 /* 461 * Sanity check the control message length. 462 */ 463 if (l_cmsg.cmsg_len > resid 464 || l_cmsg.cmsg_len < sizeof l_cmsg) { 465 error = EINVAL; 466 goto done; 467 } 468 469 /* 470 * Refuse unsupported control messages, and 471 * translate fields as appropriate. 472 */ 473 switch (l_cmsg.cmsg_level) { 474 case LINUX_SOL_SOCKET: 475 /* It only differs on some archs */ 476 if (LINUX_SOL_SOCKET != SOL_SOCKET) 477 l_cmsg.cmsg_level = SOL_SOCKET; 478 479 switch(l_cmsg.cmsg_type) { 480 case LINUX_SCM_RIGHTS: 481 /* Linux SCM_RIGHTS is same as NetBSD */ 482 break; 483 484 default: 485 /* other types not supported */ 486 error = EINVAL; 487 goto done; 488 } 489 break; 490 default: 491 /* pray and leave intact */ 492 break; 493 } 494 495 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 496 497 /* Check the buffer is big enough */ 498 if (__predict_false(cidx + cspace > clen)) { 499 u_int8_t *nc; 500 501 clen = cidx + cspace; 502 if (clen >= PAGE_SIZE) { 503 error = EINVAL; 504 goto done; 505 } 506 nc = realloc(clen <= MLEN ? NULL : control, 507 clen, M_TEMP, M_WAITOK); 508 if (!nc) { 509 error = ENOMEM; 510 goto done; 511 } 512 if (cidx <= MLEN) 513 /* Old buffer was in mbuf... */ 514 memcpy(nc, control, cidx); 515 control = nc; 516 } 517 518 /* Copy header */ 519 cmsg = (void *)&control[cidx]; 520 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 521 cmsg->cmsg_level = l_cmsg.cmsg_level; 522 cmsg->cmsg_type = l_cmsg.cmsg_type; 523 524 /* Zero are between header and data */ 525 memset(cmsg + 1, 0, 526 CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg)); 527 528 /* Copyin the data */ 529 error = copyin(LINUX_CMSG_DATA(l_cc), 530 CMSG_DATA(control), 531 l_cmsg.cmsg_len - sizeof(l_cmsg)); 532 if (error) 533 goto done; 534 535 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 536 cidx += cspace; 537 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 538 539 /* If we allocated a buffer, attach to mbuf */ 540 if (cidx > MLEN) { 541 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 542 ctl_mbuf->m_flags |= M_EXT_RW; 543 } 544 control = NULL; 545 ctl_mbuf->m_len = cidx; 546 547 msg.msg_control = ctl_mbuf; 548 msg.msg_flags |= MSG_CONTROLMBUF; 549 } 550 551 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 552 /* Freed internally */ 553 ctl_mbuf = NULL; 554 555 done: 556 if (ctl_mbuf != NULL) { 557 if (control != NULL && control != mtod(ctl_mbuf, void *)) 558 free(control, M_MBUF); 559 m_free(ctl_mbuf); 560 } 561 return (error); 562 } 563 564 int 565 linux_sys_recvfrom(struct lwp *l, void *v, register_t *retval) 566 { 567 struct linux_sys_recvfrom_args /* { 568 syscallarg(int) s; 569 syscallarg(void *) buf; 570 syscallarg(int) len; 571 syscallarg(int) flags; 572 syscallarg(struct osockaddr *) from; 573 syscallarg(int *) fromlenaddr; 574 } */ *uap = v; 575 int error; 576 struct sys_recvfrom_args bra; 577 578 SCARG(&bra, s) = SCARG(uap, s); 579 SCARG(&bra, buf) = SCARG(uap, buf); 580 SCARG(&bra, len) = SCARG(uap, len); 581 SCARG(&bra, flags) = SCARG(uap, flags); 582 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 583 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 584 585 if ((error = sys_recvfrom(l, &bra, retval))) 586 return (error); 587 588 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 589 return (error); 590 591 return (0); 592 } 593 594 static int 595 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 596 { 597 int dlen, error = 0; 598 struct cmsghdr *cmsg; 599 struct linux_cmsghdr linux_cmsg; 600 struct mbuf *m; 601 char *q, *q_end; 602 603 if (mp->msg_controllen <= 0 || control == 0) { 604 mp->msg_controllen = 0; 605 free_control_mbuf(l, control, control); 606 return 0; 607 } 608 609 q = (char *)mp->msg_control; 610 q_end = q + mp->msg_controllen; 611 612 for (m = control; m != NULL; ) { 613 cmsg = mtod(m, struct cmsghdr *); 614 615 /* 616 * Fixup cmsg. We handle two things: 617 * 0. different sizeof cmsg_len. 618 * 1. different values for level/type on some archs 619 * 2. different alignment of CMSG_DATA on some archs 620 */ 621 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 622 linux_cmsg.cmsg_level = cmsg->cmsg_level; 623 linux_cmsg.cmsg_type = cmsg->cmsg_type; 624 625 dlen = q_end - q; 626 if (linux_cmsg.cmsg_len > dlen) { 627 /* Not enough room for the parameter */ 628 dlen -= sizeof linux_cmsg; 629 if (dlen <= 0) 630 /* Discard if header wont fit */ 631 break; 632 mp->msg_flags |= MSG_CTRUNC; 633 if (linux_cmsg.cmsg_level == SOL_SOCKET 634 && linux_cmsg.cmsg_type == SCM_RIGHTS) 635 /* Do not truncate me ... */ 636 break; 637 } else 638 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 639 640 switch (linux_cmsg.cmsg_level) { 641 case SOL_SOCKET: 642 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 643 switch (linux_cmsg.cmsg_type) { 644 case SCM_RIGHTS: 645 /* Linux SCM_RIGHTS is same as NetBSD */ 646 break; 647 648 default: 649 /* other types not supported */ 650 error = EINVAL; 651 goto done; 652 } 653 /* machine dependant ! */ 654 break; 655 default: 656 /* pray and leave intact */ 657 break; 658 } 659 660 /* There can be padding between the header and data... */ 661 error = copyout(&linux_cmsg, q, sizeof *cmsg); 662 if (error != 0) { 663 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 664 dlen); 665 } 666 if (error != 0) { 667 /* We must free all the SCM_RIGHTS */ 668 m = control; 669 break; 670 } 671 m = m->m_next; 672 if (m == NULL || q + LINUX_CMSG_ALIGN(dlen) > q_end) { 673 q += dlen; 674 break; 675 } 676 q += LINUX_CMSG_ALIGN(dlen); 677 } 678 679 done: 680 free_control_mbuf(l, control, m); 681 682 mp->msg_controllen = q - (char *)mp->msg_control; 683 return error; 684 } 685 686 int 687 linux_sys_recvmsg(struct lwp *l, void *v, register_t *retval) 688 { 689 struct linux_sys_recvmsg_args /* { 690 syscallarg(int) s; 691 syscallarg(struct msghdr *) msg; 692 syscallarg(u_int) flags; 693 } */ *uap = v; 694 struct msghdr msg; 695 int error; 696 struct mbuf *from, *control; 697 698 error = copyin(SCARG(uap, msg), &msg, sizeof(msg)); 699 if (error) 700 return (error); 701 702 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 703 if (msg.msg_flags < 0) { 704 /* Some unsupported flag */ 705 return (EINVAL); 706 } 707 msg.msg_flags |= MSG_IOVUSRSPACE; 708 709 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 710 msg.msg_control != NULL ? &control : NULL, retval); 711 if (error != 0) 712 return error; 713 714 if (msg.msg_control != NULL) 715 error = linux_copyout_msg_control(l, &msg, control); 716 717 if (error == 0 && from != 0) { 718 mtod(from, struct osockaddr *)->sa_family = 719 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 720 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 721 from); 722 } else 723 msg.msg_namelen = 0; 724 725 if (from != NULL) 726 m_free(from); 727 728 if (error == 0) { 729 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 730 if (msg.msg_flags < 0) 731 /* Some flag unsupported by Linux */ 732 error = EINVAL; 733 else 734 error = copyout(&msg, SCARG(uap, msg), sizeof(msg)); 735 } 736 737 return (error); 738 } 739 740 /* 741 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 742 * is different, the rest matches IPPROTO_* on both systems. 743 */ 744 int 745 linux_to_bsd_sopt_level(int llevel) 746 { 747 748 switch (llevel) { 749 case LINUX_SOL_SOCKET: 750 return SOL_SOCKET; 751 case LINUX_SOL_IP: 752 return IPPROTO_IP; 753 case LINUX_SOL_TCP: 754 return IPPROTO_TCP; 755 case LINUX_SOL_UDP: 756 return IPPROTO_UDP; 757 default: 758 return -1; 759 } 760 } 761 762 /* 763 * Convert Linux socket level socket option numbers to NetBSD values. 764 */ 765 int 766 linux_to_bsd_so_sockopt(int lopt) 767 { 768 769 switch (lopt) { 770 case LINUX_SO_DEBUG: 771 return SO_DEBUG; 772 case LINUX_SO_REUSEADDR: 773 /* 774 * Linux does not implement SO_REUSEPORT, but allows reuse of a 775 * host:port pair through SO_REUSEADDR even if the address is not a 776 * multicast-address. Effectively, this means that we should use 777 * SO_REUSEPORT to allow Linux applications to not exit with 778 * EADDRINUSE 779 */ 780 return SO_REUSEPORT; 781 case LINUX_SO_TYPE: 782 return SO_TYPE; 783 case LINUX_SO_ERROR: 784 return SO_ERROR; 785 case LINUX_SO_DONTROUTE: 786 return SO_DONTROUTE; 787 case LINUX_SO_BROADCAST: 788 return SO_BROADCAST; 789 case LINUX_SO_SNDBUF: 790 return SO_SNDBUF; 791 case LINUX_SO_RCVBUF: 792 return SO_RCVBUF; 793 case LINUX_SO_KEEPALIVE: 794 return SO_KEEPALIVE; 795 case LINUX_SO_OOBINLINE: 796 return SO_OOBINLINE; 797 case LINUX_SO_LINGER: 798 return SO_LINGER; 799 case LINUX_SO_PRIORITY: 800 case LINUX_SO_NO_CHECK: 801 default: 802 return -1; 803 } 804 } 805 806 /* 807 * Convert Linux IP level socket option number to NetBSD values. 808 */ 809 int 810 linux_to_bsd_ip_sockopt(int lopt) 811 { 812 813 switch (lopt) { 814 case LINUX_IP_TOS: 815 return IP_TOS; 816 case LINUX_IP_TTL: 817 return IP_TTL; 818 case LINUX_IP_MULTICAST_TTL: 819 return IP_MULTICAST_TTL; 820 case LINUX_IP_MULTICAST_LOOP: 821 return IP_MULTICAST_LOOP; 822 case LINUX_IP_MULTICAST_IF: 823 return IP_MULTICAST_IF; 824 case LINUX_IP_ADD_MEMBERSHIP: 825 return IP_ADD_MEMBERSHIP; 826 case LINUX_IP_DROP_MEMBERSHIP: 827 return IP_DROP_MEMBERSHIP; 828 default: 829 return -1; 830 } 831 } 832 833 /* 834 * Convert Linux TCP level socket option number to NetBSD values. 835 */ 836 int 837 linux_to_bsd_tcp_sockopt(int lopt) 838 { 839 840 switch (lopt) { 841 case LINUX_TCP_NODELAY: 842 return TCP_NODELAY; 843 case LINUX_TCP_MAXSEG: 844 return TCP_MAXSEG; 845 default: 846 return -1; 847 } 848 } 849 850 /* 851 * Convert Linux UDP level socket option number to NetBSD values. 852 */ 853 int 854 linux_to_bsd_udp_sockopt(int lopt) 855 { 856 857 switch (lopt) { 858 default: 859 return -1; 860 } 861 } 862 863 /* 864 * Another reasonably straightforward function: setsockopt(2). 865 * The level and option numbers are converted; the values passed 866 * are not (yet) converted, the ones currently implemented don't 867 * need conversion, as they are the same on both systems. 868 */ 869 int 870 linux_sys_setsockopt(struct lwp *l, void *v, register_t *retval) 871 { 872 struct linux_sys_setsockopt_args /* { 873 syscallarg(int) s; 874 syscallarg(int) level; 875 syscallarg(int) optname; 876 syscallarg(void *) optval; 877 syscallarg(int) optlen; 878 } */ *uap = v; 879 struct proc *p = l->l_proc; 880 struct sys_setsockopt_args bsa; 881 int name; 882 883 SCARG(&bsa, s) = SCARG(uap, s); 884 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 885 SCARG(&bsa, val) = SCARG(uap, optval); 886 SCARG(&bsa, valsize) = SCARG(uap, optlen); 887 888 /* 889 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 890 * and returns EOPNOTSUPP for other levels 891 */ 892 if (SCARG(&bsa, level) != SOL_SOCKET) { 893 struct file *fp; 894 struct socket *so; 895 int error, s, family; 896 897 /* getsock() will use the descriptor for us */ 898 if ((error = getsock(p->p_fd, SCARG(&bsa, s), &fp)) != 0) 899 return error; 900 901 s = splsoftnet(); 902 so = (struct socket *)fp->f_data; 903 family = so->so_proto->pr_domain->dom_family; 904 splx(s); 905 FILE_UNUSE(fp, l); 906 907 if (family == AF_LOCAL) 908 return EOPNOTSUPP; 909 } 910 911 switch (SCARG(&bsa, level)) { 912 case SOL_SOCKET: 913 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 914 break; 915 case IPPROTO_IP: 916 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 917 break; 918 case IPPROTO_TCP: 919 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 920 break; 921 case IPPROTO_UDP: 922 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 923 break; 924 default: 925 return EINVAL; 926 } 927 928 if (name == -1) 929 return EINVAL; 930 SCARG(&bsa, name) = name; 931 932 return sys_setsockopt(l, &bsa, retval); 933 } 934 935 /* 936 * getsockopt(2) is very much the same as setsockopt(2) (see above) 937 */ 938 int 939 linux_sys_getsockopt(struct lwp *l, void *v, register_t *retval) 940 { 941 struct linux_sys_getsockopt_args /* { 942 syscallarg(int) s; 943 syscallarg(int) level; 944 syscallarg(int) optname; 945 syscallarg(void *) optval; 946 syscallarg(int *) optlen; 947 } */ *uap = v; 948 struct sys_getsockopt_args bga; 949 int name; 950 951 SCARG(&bga, s) = SCARG(uap, s); 952 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 953 SCARG(&bga, val) = SCARG(uap, optval); 954 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 955 956 switch (SCARG(&bga, level)) { 957 case SOL_SOCKET: 958 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 959 break; 960 case IPPROTO_IP: 961 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 962 break; 963 case IPPROTO_TCP: 964 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 965 break; 966 case IPPROTO_UDP: 967 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 968 break; 969 default: 970 return EINVAL; 971 } 972 973 if (name == -1) 974 return EINVAL; 975 SCARG(&bga, name) = name; 976 977 return sys_getsockopt(l, &bga, retval); 978 } 979 980 #define IF_NAME_LEN 16 981 982 int 983 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 984 void *data) 985 { 986 /* Not the full structure, just enough to map what we do here */ 987 struct linux_ifreq { 988 char if_name[IF_NAME_LEN]; 989 struct osockaddr hwaddr; 990 } lreq; 991 struct proc *p = l->l_proc; 992 struct filedesc *fdp; 993 struct file *fp; 994 struct ifaddr *ifa; 995 struct ifnet *ifp; 996 struct sockaddr_dl *sadl; 997 int error, found; 998 int index, ifnum; 999 1000 /* 1001 * We can't emulate this ioctl by calling sys_ioctl() to run 1002 * SIOCGIFCONF, because the user buffer is not of the right 1003 * type to take those results. We can't use kernel buffers to 1004 * receive the results, as the implementation of sys_ioctl() 1005 * and ifconf() [which implements SIOCGIFCONF] use 1006 * copyin()/copyout() which will fail on kernel addresses. 1007 * 1008 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1009 */ 1010 1011 fdp = p->p_fd; 1012 if ((fp = fd_getfile(fdp, fd)) == NULL) 1013 return (EBADF); 1014 1015 FILE_USE(fp); 1016 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1017 error = EBADF; 1018 goto out; 1019 } 1020 1021 error = copyin(data, &lreq, sizeof(lreq)); 1022 if (error) 1023 goto out; 1024 lreq.if_name[IF_NAME_LEN-1] = '\0'; /* just in case */ 1025 1026 /* 1027 * Try real interface name first, then fake "ethX" 1028 */ 1029 found = 0; 1030 IFNET_FOREACH(ifp) { 1031 if (found) 1032 break; 1033 if (strcmp(lreq.if_name, ifp->if_xname)) 1034 /* not this interface */ 1035 continue; 1036 found=1; 1037 if (IFADDR_EMPTY(ifp)) { 1038 error = ENODEV; 1039 goto out; 1040 } 1041 IFADDR_FOREACH(ifa, ifp) { 1042 sadl = satosdl(ifa->ifa_addr); 1043 /* only return ethernet addresses */ 1044 /* XXX what about FDDI, etc. ? */ 1045 if (sadl->sdl_family != AF_LINK || 1046 sadl->sdl_type != IFT_ETHER) 1047 continue; 1048 memcpy(&lreq.hwaddr.sa_data, CLLADDR(sadl), 1049 MIN(sadl->sdl_alen, 1050 sizeof(lreq.hwaddr.sa_data))); 1051 lreq.hwaddr.sa_family = 1052 sadl->sdl_family; 1053 error = copyout(&lreq, data, sizeof(lreq)); 1054 goto out; 1055 } 1056 } 1057 1058 if (strncmp(lreq.if_name, "eth", 3) == 0) { 1059 for (ifnum = 0, index = 3; 1060 lreq.if_name[index] != '\0' && index < IF_NAME_LEN; 1061 index++) { 1062 ifnum *= 10; 1063 ifnum += lreq.if_name[index] - '0'; 1064 } 1065 1066 error = EINVAL; /* in case we don't find one */ 1067 found = 0; 1068 IFNET_FOREACH(ifp) { 1069 if (found) 1070 break; 1071 memcpy(lreq.if_name, ifp->if_xname, 1072 MIN(IF_NAME_LEN, IFNAMSIZ)); 1073 IFADDR_FOREACH(ifa, ifp) { 1074 sadl = satosdl(ifa->ifa_addr); 1075 /* only return ethernet addresses */ 1076 /* XXX what about FDDI, etc. ? */ 1077 if (sadl->sdl_family != AF_LINK || 1078 sadl->sdl_type != IFT_ETHER) 1079 continue; 1080 if (ifnum--) 1081 /* not the reqested iface */ 1082 continue; 1083 memcpy(&lreq.hwaddr.sa_data, 1084 CLLADDR(sadl), 1085 MIN(sadl->sdl_alen, 1086 sizeof(lreq.hwaddr.sa_data))); 1087 lreq.hwaddr.sa_family = 1088 sadl->sdl_family; 1089 error = copyout(&lreq, data, sizeof(lreq)); 1090 found = 1; 1091 break; 1092 } 1093 } 1094 } else { 1095 /* unknown interface, not even an "eth*" name */ 1096 error = ENODEV; 1097 } 1098 1099 out: 1100 FILE_UNUSE(fp, l); 1101 return error; 1102 } 1103 #undef IF_NAME_LEN 1104 1105 int 1106 linux_ioctl_socket(l, uap, retval) 1107 struct lwp *l; 1108 struct linux_sys_ioctl_args /* { 1109 syscallarg(int) fd; 1110 syscallarg(u_long) com; 1111 syscallarg(void *) data; 1112 } */ *uap; 1113 register_t *retval; 1114 { 1115 struct proc *p = l->l_proc; 1116 u_long com; 1117 int error = 0, isdev = 0, dosys = 1; 1118 struct sys_ioctl_args ia; 1119 struct file *fp; 1120 struct filedesc *fdp; 1121 struct vnode *vp; 1122 int (*ioctlf)(struct file *, u_long, void *, struct lwp *); 1123 struct ioctl_pt pt; 1124 1125 fdp = p->p_fd; 1126 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1127 return (EBADF); 1128 1129 FILE_USE(fp); 1130 1131 if (fp->f_type == DTYPE_VNODE) { 1132 vp = (struct vnode *)fp->f_data; 1133 isdev = vp->v_type == VCHR; 1134 } 1135 1136 /* 1137 * Don't try to interpret socket ioctl calls that are done 1138 * on a device filedescriptor, just pass them through, to 1139 * emulate Linux behaviour. Use PTIOCLINUX so that the 1140 * device will only handle these if it's prepared to do 1141 * so, to avoid unexpected things from happening. 1142 */ 1143 if (isdev) { 1144 dosys = 0; 1145 ioctlf = fp->f_ops->fo_ioctl; 1146 pt.com = SCARG(uap, com); 1147 pt.data = SCARG(uap, data); 1148 error = ioctlf(fp, PTIOCLINUX, (void *)&pt, l); 1149 /* 1150 * XXX hack: if the function returns EJUSTRETURN, 1151 * it has stuffed a sysctl return value in pt.data. 1152 */ 1153 if (error == EJUSTRETURN) { 1154 retval[0] = (register_t)pt.data; 1155 error = 0; 1156 } 1157 goto out; 1158 } 1159 1160 com = SCARG(uap, com); 1161 retval[0] = 0; 1162 1163 switch (com) { 1164 case LINUX_SIOCGIFCONF: 1165 SCARG(&ia, com) = OOSIOCGIFCONF; 1166 break; 1167 case LINUX_SIOCGIFFLAGS: 1168 SCARG(&ia, com) = OSIOCGIFFLAGS; 1169 break; 1170 case LINUX_SIOCSIFFLAGS: 1171 SCARG(&ia, com) = OSIOCSIFFLAGS; 1172 break; 1173 case LINUX_SIOCGIFADDR: 1174 SCARG(&ia, com) = OOSIOCGIFADDR; 1175 break; 1176 case LINUX_SIOCGIFDSTADDR: 1177 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1178 break; 1179 case LINUX_SIOCGIFBRDADDR: 1180 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1181 break; 1182 case LINUX_SIOCGIFNETMASK: 1183 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1184 break; 1185 case LINUX_SIOCADDMULTI: 1186 SCARG(&ia, com) = OSIOCADDMULTI; 1187 break; 1188 case LINUX_SIOCDELMULTI: 1189 SCARG(&ia, com) = OSIOCDELMULTI; 1190 break; 1191 case LINUX_SIOCGIFHWADDR: 1192 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1193 SCARG(uap, data)); 1194 dosys = 0; 1195 break; 1196 default: 1197 error = EINVAL; 1198 } 1199 1200 out: 1201 FILE_UNUSE(fp, l); 1202 1203 if (error ==0 && dosys) { 1204 SCARG(&ia, fd) = SCARG(uap, fd); 1205 SCARG(&ia, data) = SCARG(uap, data); 1206 /* XXX NJWLWP */ 1207 error = sys_ioctl(curlwp, &ia, retval); 1208 } 1209 1210 return error; 1211 } 1212 1213 int 1214 linux_sys_connect(struct lwp *l, void *v, register_t *retval) 1215 { 1216 struct linux_sys_connect_args /* { 1217 syscallarg(int) s; 1218 syscallarg(const struct sockaddr *) name; 1219 syscallarg(int) namelen; 1220 } */ *uap = v; 1221 int error; 1222 struct mbuf *nam; 1223 1224 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1225 SCARG(uap, namelen)); 1226 if (error) 1227 return (error); 1228 1229 error = do_sys_connect(l, SCARG(uap, s), nam); 1230 1231 if (error == EISCONN) { 1232 struct file *fp; 1233 struct socket *so; 1234 int s, state, prflags; 1235 1236 /* getsock() will use the descriptor for us */ 1237 if (getsock(l->l_proc->p_fd, SCARG(uap, s), &fp) != 0) 1238 return EISCONN; 1239 1240 s = splsoftnet(); 1241 so = (struct socket *)fp->f_data; 1242 state = so->so_state; 1243 prflags = so->so_proto->pr_flags; 1244 splx(s); 1245 FILE_UNUSE(fp, l); 1246 /* 1247 * We should only let this call succeed once per 1248 * non-blocking connect; however we don't have 1249 * a convenient place to keep that state.. 1250 */ 1251 if ((state & SS_NBIO) && (state & SS_ISCONNECTED) && 1252 (prflags & PR_CONNREQUIRED)) 1253 return 0; 1254 } 1255 1256 return (error); 1257 } 1258 1259 int 1260 linux_sys_bind(struct lwp *l, void *v, register_t *retval) 1261 { 1262 struct linux_sys_bind_args /* { 1263 syscallarg(int) s; 1264 syscallarg(const struct osockaddr *) name; 1265 syscallarg(int) namelen; 1266 } */ *uap = v; 1267 int error; 1268 struct mbuf *nam; 1269 1270 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1271 SCARG(uap, namelen)); 1272 if (error) 1273 return (error); 1274 1275 return do_sys_bind(l, SCARG(uap, s), nam); 1276 } 1277 1278 int 1279 linux_sys_getsockname(struct lwp *l, void *v, register_t *retval) 1280 { 1281 struct linux_sys_getsockname_args /* { 1282 syscallarg(int) fdes; 1283 syscallarg(void *) asa; 1284 syscallarg(int *) alen; 1285 } */ *uap = v; 1286 int error; 1287 1288 if ((error = sys_getsockname(l, 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 int 1298 linux_sys_getpeername(struct lwp *l, void *v, register_t *retval) 1299 { 1300 struct sys_getpeername_args /* { 1301 syscallarg(int) fdes; 1302 syscallarg(void *) asa; 1303 syscallarg(int *) alen; 1304 } */ *uap = v; 1305 int error; 1306 1307 if ((error = sys_getpeername(l, uap, retval)) != 0) 1308 return (error); 1309 1310 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1311 return (error); 1312 1313 return (0); 1314 } 1315 1316 /* 1317 * Copy the osockaddr structure pointed to by osa to mbuf, adjust 1318 * family and convert to sockaddr. 1319 */ 1320 static int 1321 linux_get_sa(struct lwp *l, int s, struct mbuf **mp, const struct osockaddr *osa, int salen) 1322 { 1323 int error, bdom; 1324 struct sockaddr *sa; 1325 struct osockaddr *kosa; 1326 struct mbuf *m; 1327 1328 if (salen == 1 || salen > UCHAR_MAX) { 1329 DPRINTF(("bad osa=%p salen=%d\n", osa, salen)); 1330 return EINVAL; 1331 } 1332 1333 /* We'll need the address in an mbuf later, so copy into one here */ 1334 m = m_get(M_WAIT, MT_SONAME); 1335 if (salen > MLEN) 1336 MEXTMALLOC(m, salen, M_WAITOK); 1337 1338 m->m_len = salen; 1339 1340 if (salen == 0) 1341 return 0; 1342 1343 kosa = mtod(m, void *); 1344 if ((error = copyin(osa, kosa, salen))) { 1345 DPRINTF(("error %d copying osa %p len %d\n", 1346 error, osa, salen)); 1347 goto bad; 1348 } 1349 1350 ktrkuser("linux sockaddr", kosa, salen); 1351 1352 bdom = linux_to_bsd_domain(kosa->sa_family); 1353 if (bdom == -1) { 1354 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1355 error = EINVAL; 1356 goto bad; 1357 } 1358 1359 /* 1360 * If the family is unspecified, use address family of the socket. 1361 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1362 */ 1363 if (bdom == AF_UNSPEC) { 1364 struct file *fp; 1365 struct socket *so; 1366 1367 /* getsock() will use the descriptor for us */ 1368 if ((error = getsock(l->l_proc->p_fd, s, &fp)) != 0) 1369 goto bad; 1370 1371 so = (struct socket *)fp->f_data; 1372 bdom = so->so_proto->pr_domain->dom_family; 1373 1374 FILE_UNUSE(fp, l); 1375 1376 DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom)); 1377 } 1378 1379 #ifdef INET6 1380 /* 1381 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1382 * which lacks the scope id compared with RFC2553 one. If we detect 1383 * the situation, reject the address and write a message to system log. 1384 * 1385 * Still accept addresses for which the scope id is not used. 1386 */ 1387 if (bdom == AF_INET6 && salen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1388 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)kosa; 1389 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1390 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1391 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1392 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1393 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1394 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1395 struct proc *p = l->l_proc; 1396 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1397 1398 log(LOG_DEBUG, 1399 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1400 "sockaddr_in6 rejected", 1401 p->p_pid, p->p_comm, uid); 1402 error = EINVAL; 1403 goto bad; 1404 } 1405 salen = sizeof (struct sockaddr_in6); 1406 sin6->sin6_scope_id = 0; 1407 } 1408 #endif 1409 1410 if (bdom == AF_INET) 1411 salen = sizeof(struct sockaddr_in); 1412 1413 sa = (struct sockaddr *) kosa; 1414 sa->sa_family = bdom; 1415 sa->sa_len = salen; 1416 m->m_len = salen; 1417 ktrkuser("new sockaddr", kosa, salen); 1418 1419 #ifdef DEBUG_LINUX 1420 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1421 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1422 DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom])); 1423 DPRINTF(("\n")); 1424 #endif 1425 1426 *mp = m; 1427 return 0; 1428 1429 bad: 1430 m_free(m); 1431 return error; 1432 } 1433 1434 static int 1435 linux_sa_put(struct osockaddr *osa) 1436 { 1437 struct sockaddr sa; 1438 struct osockaddr *kosa; 1439 int error, bdom, len; 1440 1441 /* 1442 * Only read/write the sockaddr family and length part, the rest is 1443 * not changed. 1444 */ 1445 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1446 1447 error = copyin(osa, &sa, len); 1448 if (error) 1449 return (error); 1450 1451 bdom = bsd_to_linux_domain(sa.sa_family); 1452 if (bdom == -1) 1453 return (EINVAL); 1454 1455 /* Note: we convert from sockaddr to osockaddr here, too */ 1456 kosa = (struct osockaddr *) &sa; 1457 kosa->sa_family = bdom; 1458 error = copyout(kosa, osa, len); 1459 if (error) 1460 return (error); 1461 1462 return (0); 1463 } 1464 1465 #ifndef __amd64__ 1466 int 1467 linux_sys_recv(struct lwp *l, void *v, register_t *retval) 1468 { 1469 struct linux_sys_recv_args /* { 1470 syscallarg(int) s; 1471 syscallarg(void *) buf; 1472 syscallarg(int) len; 1473 syscallarg(int) flags; 1474 } */ *uap = v; 1475 struct sys_recvfrom_args bra; 1476 1477 1478 SCARG(&bra, s) = SCARG(uap, s); 1479 SCARG(&bra, buf) = SCARG(uap, buf); 1480 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1481 SCARG(&bra, flags) = SCARG(uap, flags); 1482 SCARG(&bra, from) = NULL; 1483 SCARG(&bra, fromlenaddr) = NULL; 1484 1485 return (sys_recvfrom(l, &bra, retval)); 1486 } 1487 1488 int 1489 linux_sys_send(struct lwp *l, void *v, register_t *retval) 1490 { 1491 struct linux_sys_send_args /* { 1492 syscallarg(int) s; 1493 syscallarg(void *) buf; 1494 syscallarg(int) len; 1495 syscallarg(int) flags; 1496 } */ *uap = v; 1497 struct sys_sendto_args bsa; 1498 1499 SCARG(&bsa, s) = SCARG(uap, s); 1500 SCARG(&bsa, buf) = SCARG(uap, buf); 1501 SCARG(&bsa, len) = SCARG(uap, len); 1502 SCARG(&bsa, flags) = SCARG(uap, flags); 1503 SCARG(&bsa, to) = NULL; 1504 SCARG(&bsa, tolen) = 0; 1505 1506 return (sys_sendto(l, &bsa, retval)); 1507 } 1508 #endif 1509 1510 int 1511 linux_sys_accept(struct lwp *l, void *v, register_t *retval) 1512 { 1513 struct linux_sys_accept_args /* { 1514 syscallarg(int) s; 1515 syscallarg(struct osockaddr *) name; 1516 syscallarg(int *) anamelen; 1517 } */ *uap = v; 1518 int error; 1519 struct sys_accept_args baa; 1520 1521 SCARG(&baa, s) = SCARG(uap, s); 1522 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1523 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1524 1525 if ((error = sys_accept(l, &baa, retval))) 1526 return (error); 1527 1528 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1529 return (error); 1530 1531 return (0); 1532 } 1533