1 /* $NetBSD: linux_socket.c,v 1.80 2007/10/19 18:52:12 njoly 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 1.80 2007/10/19 18:52:12 njoly 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 __P((int)); 121 static int bsd_to_linux_domain __P((int)); 122 int linux_to_bsd_sopt_level __P((int)); 123 int linux_to_bsd_so_sockopt __P((int)); 124 int linux_to_bsd_ip_sockopt __P((int)); 125 int linux_to_bsd_tcp_sockopt __P((int)); 126 int linux_to_bsd_udp_sockopt __P((int)); 127 int linux_getifhwaddr __P((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 __P((struct osockaddr *osa)); 131 static int linux_to_bsd_msg_flags __P((int)); 132 static int bsd_to_linux_msg_flags __P((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(ldom) 224 int ldom; 225 { 226 if (ldom < 0 || ldom >= LINUX_AF_MAX) 227 return (-1); 228 229 return linux_to_bsd_domain_[ldom]; 230 } 231 232 /* 233 * Convert between BSD and Linux socket domain values 234 */ 235 static int 236 bsd_to_linux_domain(bdom) 237 int bdom; 238 { 239 if (bdom < 0 || bdom >= AF_MAX) 240 return (-1); 241 242 return bsd_to_linux_domain_[bdom]; 243 } 244 245 static int 246 linux_to_bsd_msg_flags(lflag) 247 int lflag; 248 { 249 int i, lfl, bfl; 250 int bflag = 0; 251 252 if (lflag == 0) 253 return (0); 254 255 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 256 bfl = bsd_to_linux_msg_flags_[i].bfl; 257 lfl = bsd_to_linux_msg_flags_[i].lfl; 258 259 if (lfl == 0) 260 continue; 261 262 if (lflag & lfl) { 263 if (bfl < 0) 264 return (-1); 265 266 bflag |= bfl; 267 } 268 } 269 270 return (bflag); 271 } 272 273 static int 274 bsd_to_linux_msg_flags(bflag) 275 int bflag; 276 { 277 int i, lfl, bfl; 278 int lflag = 0; 279 280 if (bflag == 0) 281 return (0); 282 283 for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { 284 bfl = bsd_to_linux_msg_flags_[i].bfl; 285 lfl = bsd_to_linux_msg_flags_[i].lfl; 286 287 if (bfl <= 0) 288 continue; 289 290 if (bflag & bfl) { 291 if (lfl < 0) 292 return (-1); 293 294 lflag |= lfl; 295 } 296 } 297 298 return (lflag); 299 } 300 301 int 302 linux_sys_socket(l, v, retval) 303 struct lwp *l; 304 void *v; 305 register_t *retval; 306 { 307 struct linux_sys_socket_args /* { 308 syscallarg(int) domain; 309 syscallarg(int) type; 310 syscallarg(int) protocol; 311 } */ *uap = v; 312 struct compat_30_sys_socket_args bsa; 313 int error; 314 315 SCARG(&bsa, protocol) = SCARG(uap, protocol); 316 SCARG(&bsa, type) = SCARG(uap, type); 317 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 318 if (SCARG(&bsa, domain) == -1) 319 return EINVAL; 320 error = sys___socket30(l, &bsa, retval); 321 322 #ifdef INET6 323 /* 324 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 325 * default and some apps depend on this. So, set V6ONLY to 0 326 * for Linux apps if the sysctl value is set to 1. 327 */ 328 if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { 329 struct proc *p = l->l_proc; 330 struct file *fp; 331 332 if (getsock(p->p_fd, *retval, &fp) == 0) { 333 struct mbuf *m; 334 335 m = m_get(M_WAIT, MT_SOOPTS); 336 m->m_len = sizeof(int); 337 *mtod(m, int *) = 0; 338 339 /* ignore error */ 340 (void) sosetopt((struct socket *)fp->f_data, 341 IPPROTO_IPV6, IPV6_V6ONLY, m); 342 343 FILE_UNUSE(fp, l); 344 } 345 } 346 #endif 347 348 return (error); 349 } 350 351 int 352 linux_sys_socketpair(l, v, retval) 353 struct lwp *l; 354 void *v; 355 register_t *retval; 356 { 357 struct linux_sys_socketpair_args /* { 358 syscallarg(int) domain; 359 syscallarg(int) type; 360 syscallarg(int) protocol; 361 syscallarg(int *) rsv; 362 } */ *uap = v; 363 struct sys_socketpair_args bsa; 364 365 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 366 if (SCARG(&bsa, domain) == -1) 367 return EINVAL; 368 SCARG(&bsa, type) = SCARG(uap, type); 369 SCARG(&bsa, protocol) = SCARG(uap, protocol); 370 SCARG(&bsa, rsv) = SCARG(uap, rsv); 371 372 return sys_socketpair(l, &bsa, retval); 373 } 374 375 int 376 linux_sys_sendto(l, v, retval) 377 struct lwp *l; 378 void *v; 379 register_t *retval; 380 { 381 struct linux_sys_sendto_args /* { 382 syscallarg(int) s; 383 syscallarg(void *) msg; 384 syscallarg(int) len; 385 syscallarg(int) flags; 386 syscallarg(struct osockaddr *) to; 387 syscallarg(int) tolen; 388 } */ *uap = v; 389 struct msghdr msg; 390 struct iovec aiov; 391 struct mbuf *nam; 392 int bflags; 393 int error; 394 395 /* Translate message flags. */ 396 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 397 if (bflags < 0) 398 /* Some supported flag */ 399 return EINVAL; 400 401 /* Read in and convert the sockaddr */ 402 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to), 403 SCARG(uap, tolen)); 404 if (error) 405 return (error); 406 msg.msg_flags = MSG_NAMEMBUF; 407 408 msg.msg_name = nam; 409 msg.msg_namelen = SCARG(uap, tolen); 410 msg.msg_iov = &aiov; 411 msg.msg_iovlen = 1; 412 msg.msg_control = 0; 413 aiov.iov_base = __UNCONST(SCARG(uap, msg)); 414 aiov.iov_len = SCARG(uap, len); 415 416 return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 417 } 418 419 int 420 linux_sys_sendmsg(l, v, retval) 421 struct lwp *l; 422 void *v; 423 register_t *retval; 424 { 425 struct linux_sys_sendmsg_args /* { 426 syscallarg(int) s; 427 syscallarg(struct msghdr *) msg; 428 syscallarg(u_int) flags; 429 } */ *uap = v; 430 struct msghdr msg; 431 int error; 432 int bflags; 433 struct mbuf *nam; 434 u_int8_t *control; 435 struct mbuf *ctl_mbuf = NULL; 436 437 msg.msg_flags = MSG_IOVUSRSPACE; 438 439 /* 440 * Translate message flags. 441 */ 442 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 443 if (bflags < 0) 444 /* Some supported flag */ 445 return EINVAL; 446 447 if (msg.msg_name) { 448 /* Read in and convert the sockaddr */ 449 error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, 450 msg.msg_namelen); 451 if (error) 452 return (error); 453 msg.msg_flags |= MSG_NAMEMBUF; 454 msg.msg_name = nam; 455 } 456 457 /* 458 * Handle cmsg if there is any. 459 */ 460 if (CMSG_FIRSTHDR(&msg)) { 461 struct linux_cmsghdr l_cmsg, *l_cc; 462 struct cmsghdr *cmsg; 463 ssize_t resid = msg.msg_controllen; 464 size_t clen, cidx = 0, cspace; 465 466 ctl_mbuf = m_get(M_WAIT, MT_CONTROL); 467 clen = MLEN; 468 control = mtod(ctl_mbuf, void *); 469 470 l_cc = LINUX_CMSG_FIRSTHDR(&msg); 471 do { 472 error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); 473 if (error) 474 goto done; 475 476 /* 477 * Sanity check the control message length. 478 */ 479 if (l_cmsg.cmsg_len > resid 480 || l_cmsg.cmsg_len < sizeof l_cmsg) { 481 error = EINVAL; 482 goto done; 483 } 484 485 /* 486 * Refuse unsupported control messages, and 487 * translate fields as appropriate. 488 */ 489 switch (l_cmsg.cmsg_level) { 490 case LINUX_SOL_SOCKET: 491 /* It only differs on some archs */ 492 if (LINUX_SOL_SOCKET != SOL_SOCKET) 493 l_cmsg.cmsg_level = SOL_SOCKET; 494 495 switch(l_cmsg.cmsg_type) { 496 case LINUX_SCM_RIGHTS: 497 /* Linux SCM_RIGHTS is same as NetBSD */ 498 break; 499 500 default: 501 /* other types not supported */ 502 error = EINVAL; 503 goto done; 504 } 505 break; 506 default: 507 /* pray and leave intact */ 508 break; 509 } 510 511 cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); 512 513 /* Check the buffer is big enough */ 514 if (__predict_false(cidx + cspace > clen)) { 515 u_int8_t *nc; 516 517 clen = cidx + cspace; 518 if (clen >= PAGE_SIZE) { 519 error = EINVAL; 520 goto done; 521 } 522 nc = realloc(clen <= MLEN ? NULL : control, 523 clen, M_TEMP, M_WAITOK); 524 if (!nc) { 525 error = ENOMEM; 526 goto done; 527 } 528 if (cidx <= MLEN) 529 /* Old buffer was in mbuf... */ 530 memcpy(nc, control, cidx); 531 control = nc; 532 } 533 534 /* Copy header */ 535 cmsg = (void *)&control[cidx]; 536 cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; 537 cmsg->cmsg_level = l_cmsg.cmsg_level; 538 cmsg->cmsg_type = l_cmsg.cmsg_type; 539 540 /* Zero are between header and data */ 541 memset(cmsg + 1, 0, 542 CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg)); 543 544 /* Copyin the data */ 545 error = copyin(LINUX_CMSG_DATA(l_cc), 546 CMSG_DATA(control), 547 l_cmsg.cmsg_len - sizeof(l_cmsg)); 548 if (error) 549 goto done; 550 551 resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); 552 cidx += cspace; 553 } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc)) && resid > 0); 554 555 /* If we allocated a buffer, attach to mbuf */ 556 if (cidx > MLEN) { 557 MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); 558 ctl_mbuf->m_flags |= M_EXT_RW; 559 } 560 control = NULL; 561 ctl_mbuf->m_len = cidx; 562 563 msg.msg_control = ctl_mbuf; 564 msg.msg_flags |= MSG_CONTROLMBUF; 565 } 566 567 error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, retval); 568 /* Freed internally */ 569 ctl_mbuf = NULL; 570 571 done: 572 if (ctl_mbuf != NULL) { 573 if (control != NULL && control != mtod(ctl_mbuf, void *)) 574 free(control, M_MBUF); 575 m_free(ctl_mbuf); 576 } 577 return (error); 578 } 579 580 int 581 linux_sys_recvfrom(l, v, retval) 582 struct lwp *l; 583 void *v; 584 register_t *retval; 585 { 586 struct linux_sys_recvfrom_args /* { 587 syscallarg(int) s; 588 syscallarg(void *) buf; 589 syscallarg(int) len; 590 syscallarg(int) flags; 591 syscallarg(struct osockaddr *) from; 592 syscallarg(int *) fromlenaddr; 593 } */ *uap = v; 594 int error; 595 struct sys_recvfrom_args bra; 596 597 SCARG(&bra, s) = SCARG(uap, s); 598 SCARG(&bra, buf) = SCARG(uap, buf); 599 SCARG(&bra, len) = SCARG(uap, len); 600 SCARG(&bra, flags) = SCARG(uap, flags); 601 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 602 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 603 604 if ((error = sys_recvfrom(l, &bra, retval))) 605 return (error); 606 607 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 608 return (error); 609 610 return (0); 611 } 612 613 static int 614 linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) 615 { 616 int dlen, error = 0; 617 struct cmsghdr *cmsg; 618 struct linux_cmsghdr linux_cmsg; 619 struct mbuf *m; 620 char *q, *q_end; 621 622 if (mp->msg_controllen <= 0 || control == 0) { 623 mp->msg_controllen = 0; 624 free_control_mbuf(l, control, control); 625 return 0; 626 } 627 628 q = (char *)mp->msg_control; 629 q_end = q + mp->msg_controllen; 630 631 for (m = control; m != NULL; ) { 632 cmsg = mtod(m, struct cmsghdr *); 633 634 /* 635 * Fixup cmsg. We handle two things: 636 * 0. different sizeof cmsg_len. 637 * 1. different values for level/type on some archs 638 * 2. different alignment of CMSG_DATA on some archs 639 */ 640 linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; 641 linux_cmsg.cmsg_level = cmsg->cmsg_level; 642 linux_cmsg.cmsg_type = cmsg->cmsg_type; 643 644 dlen = q_end - q; 645 if (linux_cmsg.cmsg_len > dlen) { 646 /* Not enough room for the parameter */ 647 dlen -= sizeof linux_cmsg; 648 if (dlen <= 0) 649 /* Discard if header wont fit */ 650 break; 651 mp->msg_flags |= MSG_CTRUNC; 652 if (linux_cmsg.cmsg_level == SOL_SOCKET 653 && linux_cmsg.cmsg_type == SCM_RIGHTS) 654 /* Do not truncate me ... */ 655 break; 656 } else 657 dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; 658 659 switch (linux_cmsg.cmsg_level) { 660 case SOL_SOCKET: 661 linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; 662 switch (linux_cmsg.cmsg_type) { 663 case SCM_RIGHTS: 664 /* Linux SCM_RIGHTS is same as NetBSD */ 665 break; 666 667 default: 668 /* other types not supported */ 669 error = EINVAL; 670 goto done; 671 } 672 /* machine dependant ! */ 673 break; 674 default: 675 /* pray and leave intact */ 676 break; 677 } 678 679 /* There can be padding between the header and data... */ 680 error = copyout(&linux_cmsg, q, sizeof *cmsg); 681 if (error != 0) { 682 error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, 683 dlen); 684 } 685 if (error != 0) { 686 /* We must free all the SCM_RIGHTS */ 687 m = control; 688 break; 689 } 690 m = m->m_next; 691 if (m == NULL || q + LINUX_CMSG_ALIGN(dlen) > q_end) { 692 q += dlen; 693 break; 694 } 695 q += LINUX_CMSG_ALIGN(dlen); 696 } 697 698 done: 699 free_control_mbuf(l, control, m); 700 701 mp->msg_controllen = q - (char *)mp->msg_control; 702 return error; 703 } 704 705 int 706 linux_sys_recvmsg(l, v, retval) 707 struct lwp *l; 708 void *v; 709 register_t *retval; 710 { 711 struct linux_sys_recvmsg_args /* { 712 syscallarg(int) s; 713 syscallarg(struct msghdr *) msg; 714 syscallarg(u_int) flags; 715 } */ *uap = v; 716 struct msghdr msg; 717 int error; 718 struct mbuf *from, *control; 719 720 error = copyin(SCARG(uap, msg), &msg, sizeof(msg)); 721 if (error) 722 return (error); 723 724 msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 725 if (msg.msg_flags < 0) { 726 /* Some unsupported flag */ 727 return (EINVAL); 728 } 729 msg.msg_flags |= MSG_IOVUSRSPACE; 730 731 error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, 732 msg.msg_control != NULL ? &control : NULL, retval); 733 if (error != 0) 734 return error; 735 736 if (msg.msg_control != NULL) 737 error = linux_copyout_msg_control(l, &msg, control); 738 739 if (error == 0 && from != 0) { 740 mtod(from, struct osockaddr *)->sa_family = 741 bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); 742 error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, 743 from); 744 } else 745 msg.msg_namelen = 0; 746 747 if (from != NULL) 748 m_free(from); 749 750 if (error == 0) { 751 msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); 752 if (msg.msg_flags < 0) 753 /* Some flag unsupported by Linux */ 754 error = EINVAL; 755 else 756 error = copyout(&msg, SCARG(uap, msg), sizeof(msg)); 757 } 758 759 return (error); 760 } 761 762 /* 763 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 764 * is different, the rest matches IPPROTO_* on both systems. 765 */ 766 int 767 linux_to_bsd_sopt_level(llevel) 768 int llevel; 769 { 770 771 switch (llevel) { 772 case LINUX_SOL_SOCKET: 773 return SOL_SOCKET; 774 case LINUX_SOL_IP: 775 return IPPROTO_IP; 776 case LINUX_SOL_TCP: 777 return IPPROTO_TCP; 778 case LINUX_SOL_UDP: 779 return IPPROTO_UDP; 780 default: 781 return -1; 782 } 783 } 784 785 /* 786 * Convert Linux socket level socket option numbers to NetBSD values. 787 */ 788 int 789 linux_to_bsd_so_sockopt(lopt) 790 int lopt; 791 { 792 793 switch (lopt) { 794 case LINUX_SO_DEBUG: 795 return SO_DEBUG; 796 case LINUX_SO_REUSEADDR: 797 /* 798 * Linux does not implement SO_REUSEPORT, but allows reuse of a 799 * host:port pair through SO_REUSEADDR even if the address is not a 800 * multicast-address. Effectively, this means that we should use 801 * SO_REUSEPORT to allow Linux applications to not exit with 802 * EADDRINUSE 803 */ 804 return SO_REUSEPORT; 805 case LINUX_SO_TYPE: 806 return SO_TYPE; 807 case LINUX_SO_ERROR: 808 return SO_ERROR; 809 case LINUX_SO_DONTROUTE: 810 return SO_DONTROUTE; 811 case LINUX_SO_BROADCAST: 812 return SO_BROADCAST; 813 case LINUX_SO_SNDBUF: 814 return SO_SNDBUF; 815 case LINUX_SO_RCVBUF: 816 return SO_RCVBUF; 817 case LINUX_SO_KEEPALIVE: 818 return SO_KEEPALIVE; 819 case LINUX_SO_OOBINLINE: 820 return SO_OOBINLINE; 821 case LINUX_SO_LINGER: 822 return SO_LINGER; 823 case LINUX_SO_PRIORITY: 824 case LINUX_SO_NO_CHECK: 825 default: 826 return -1; 827 } 828 } 829 830 /* 831 * Convert Linux IP level socket option number to NetBSD values. 832 */ 833 int 834 linux_to_bsd_ip_sockopt(lopt) 835 int lopt; 836 { 837 838 switch (lopt) { 839 case LINUX_IP_TOS: 840 return IP_TOS; 841 case LINUX_IP_TTL: 842 return IP_TTL; 843 case LINUX_IP_MULTICAST_TTL: 844 return IP_MULTICAST_TTL; 845 case LINUX_IP_MULTICAST_LOOP: 846 return IP_MULTICAST_LOOP; 847 case LINUX_IP_MULTICAST_IF: 848 return IP_MULTICAST_IF; 849 case LINUX_IP_ADD_MEMBERSHIP: 850 return IP_ADD_MEMBERSHIP; 851 case LINUX_IP_DROP_MEMBERSHIP: 852 return IP_DROP_MEMBERSHIP; 853 default: 854 return -1; 855 } 856 } 857 858 /* 859 * Convert Linux TCP level socket option number to NetBSD values. 860 */ 861 int 862 linux_to_bsd_tcp_sockopt(lopt) 863 int lopt; 864 { 865 866 switch (lopt) { 867 case LINUX_TCP_NODELAY: 868 return TCP_NODELAY; 869 case LINUX_TCP_MAXSEG: 870 return TCP_MAXSEG; 871 default: 872 return -1; 873 } 874 } 875 876 /* 877 * Convert Linux UDP level socket option number to NetBSD values. 878 */ 879 int 880 linux_to_bsd_udp_sockopt(lopt) 881 int lopt; 882 { 883 884 switch (lopt) { 885 default: 886 return -1; 887 } 888 } 889 890 /* 891 * Another reasonably straightforward function: setsockopt(2). 892 * The level and option numbers are converted; the values passed 893 * are not (yet) converted, the ones currently implemented don't 894 * need conversion, as they are the same on both systems. 895 */ 896 int 897 linux_sys_setsockopt(l, v, retval) 898 struct lwp *l; 899 void *v; 900 register_t *retval; 901 { 902 struct linux_sys_setsockopt_args /* { 903 syscallarg(int) s; 904 syscallarg(int) level; 905 syscallarg(int) optname; 906 syscallarg(void *) optval; 907 syscallarg(int) optlen; 908 } */ *uap = v; 909 struct proc *p = l->l_proc; 910 struct sys_setsockopt_args bsa; 911 int name; 912 913 SCARG(&bsa, s) = SCARG(uap, s); 914 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 915 SCARG(&bsa, val) = SCARG(uap, optval); 916 SCARG(&bsa, valsize) = SCARG(uap, optlen); 917 918 /* 919 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 920 * and returns EOPNOTSUPP for other levels 921 */ 922 if (SCARG(&bsa, level) != SOL_SOCKET) { 923 struct file *fp; 924 struct socket *so; 925 int error, s, family; 926 927 /* getsock() will use the descriptor for us */ 928 if ((error = getsock(p->p_fd, SCARG(&bsa, s), &fp)) != 0) 929 return error; 930 931 s = splsoftnet(); 932 so = (struct socket *)fp->f_data; 933 family = so->so_proto->pr_domain->dom_family; 934 splx(s); 935 FILE_UNUSE(fp, l); 936 937 if (family == AF_LOCAL) 938 return EOPNOTSUPP; 939 } 940 941 switch (SCARG(&bsa, level)) { 942 case SOL_SOCKET: 943 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 944 break; 945 case IPPROTO_IP: 946 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 947 break; 948 case IPPROTO_TCP: 949 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 950 break; 951 case IPPROTO_UDP: 952 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 953 break; 954 default: 955 return EINVAL; 956 } 957 958 if (name == -1) 959 return EINVAL; 960 SCARG(&bsa, name) = name; 961 962 return sys_setsockopt(l, &bsa, retval); 963 } 964 965 /* 966 * getsockopt(2) is very much the same as setsockopt(2) (see above) 967 */ 968 int 969 linux_sys_getsockopt(l, v, retval) 970 struct lwp *l; 971 void *v; 972 register_t *retval; 973 { 974 struct linux_sys_getsockopt_args /* { 975 syscallarg(int) s; 976 syscallarg(int) level; 977 syscallarg(int) optname; 978 syscallarg(void *) optval; 979 syscallarg(int *) optlen; 980 } */ *uap = v; 981 struct sys_getsockopt_args bga; 982 int name; 983 984 SCARG(&bga, s) = SCARG(uap, s); 985 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 986 SCARG(&bga, val) = SCARG(uap, optval); 987 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 988 989 switch (SCARG(&bga, level)) { 990 case SOL_SOCKET: 991 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 992 break; 993 case IPPROTO_IP: 994 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 995 break; 996 case IPPROTO_TCP: 997 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 998 break; 999 case IPPROTO_UDP: 1000 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1001 break; 1002 default: 1003 return EINVAL; 1004 } 1005 1006 if (name == -1) 1007 return EINVAL; 1008 SCARG(&bga, name) = name; 1009 1010 return sys_getsockopt(l, &bga, retval); 1011 } 1012 1013 #define IF_NAME_LEN 16 1014 1015 int 1016 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 1017 void *data) 1018 { 1019 /* Not the full structure, just enough to map what we do here */ 1020 struct linux_ifreq { 1021 char if_name[IF_NAME_LEN]; 1022 struct osockaddr hwaddr; 1023 } lreq; 1024 struct proc *p = l->l_proc; 1025 struct filedesc *fdp; 1026 struct file *fp; 1027 struct ifaddr *ifa; 1028 struct ifnet *ifp; 1029 struct sockaddr_dl *sadl; 1030 int error, found; 1031 int index, ifnum; 1032 1033 /* 1034 * We can't emulate this ioctl by calling sys_ioctl() to run 1035 * SIOCGIFCONF, because the user buffer is not of the right 1036 * type to take those results. We can't use kernel buffers to 1037 * receive the results, as the implementation of sys_ioctl() 1038 * and ifconf() [which implements SIOCGIFCONF] use 1039 * copyin()/copyout() which will fail on kernel addresses. 1040 * 1041 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1042 */ 1043 1044 fdp = p->p_fd; 1045 if ((fp = fd_getfile(fdp, fd)) == NULL) 1046 return (EBADF); 1047 1048 FILE_USE(fp); 1049 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1050 error = EBADF; 1051 goto out; 1052 } 1053 1054 error = copyin(data, &lreq, sizeof(lreq)); 1055 if (error) 1056 goto out; 1057 lreq.if_name[IF_NAME_LEN-1] = '\0'; /* just in case */ 1058 1059 /* 1060 * Try real interface name first, then fake "ethX" 1061 */ 1062 for (ifp = ifnet.tqh_first, found = 0; 1063 ifp != 0 && !found; 1064 ifp = ifp->if_list.tqe_next) { 1065 if (strcmp(lreq.if_name, ifp->if_xname)) 1066 /* not this interface */ 1067 continue; 1068 found=1; 1069 if ((ifa = ifp->if_addrlist.tqh_first) != 0) { 1070 for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 1071 sadl = satosdl(ifa->ifa_addr); 1072 /* only return ethernet addresses */ 1073 /* XXX what about FDDI, etc. ? */ 1074 if (sadl->sdl_family != AF_LINK || 1075 sadl->sdl_type != IFT_ETHER) 1076 continue; 1077 memcpy(&lreq.hwaddr.sa_data, CLLADDR(sadl), 1078 MIN(sadl->sdl_alen, 1079 sizeof(lreq.hwaddr.sa_data))); 1080 lreq.hwaddr.sa_family = 1081 sadl->sdl_family; 1082 error = copyout(&lreq, data, sizeof(lreq)); 1083 goto out; 1084 } 1085 } else { 1086 error = ENODEV; 1087 goto out; 1088 } 1089 } 1090 1091 if (strncmp(lreq.if_name, "eth", 3) == 0) { 1092 for (ifnum = 0, index = 3; 1093 lreq.if_name[index] != '\0' && index < IF_NAME_LEN; 1094 index++) { 1095 ifnum *= 10; 1096 ifnum += lreq.if_name[index] - '0'; 1097 } 1098 1099 error = EINVAL; /* in case we don't find one */ 1100 for (ifp = ifnet.tqh_first, found = 0; 1101 ifp != 0 && !found; 1102 ifp = ifp->if_list.tqe_next) { 1103 memcpy(lreq.if_name, ifp->if_xname, 1104 MIN(IF_NAME_LEN, IFNAMSIZ)); 1105 if ((ifa = ifp->if_addrlist.tqh_first) == 0) 1106 /* no addresses on this interface */ 1107 continue; 1108 else 1109 for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 1110 sadl = satosdl(ifa->ifa_addr); 1111 /* only return ethernet addresses */ 1112 /* XXX what about FDDI, etc. ? */ 1113 if (sadl->sdl_family != AF_LINK || 1114 sadl->sdl_type != IFT_ETHER) 1115 continue; 1116 if (ifnum--) 1117 /* not the reqested iface */ 1118 continue; 1119 memcpy(&lreq.hwaddr.sa_data, 1120 CLLADDR(sadl), 1121 MIN(sadl->sdl_alen, 1122 sizeof(lreq.hwaddr.sa_data))); 1123 lreq.hwaddr.sa_family = 1124 sadl->sdl_family; 1125 error = copyout(&lreq, data, sizeof(lreq)); 1126 found = 1; 1127 break; 1128 } 1129 } 1130 } else { 1131 /* unknown interface, not even an "eth*" name */ 1132 error = ENODEV; 1133 } 1134 1135 out: 1136 FILE_UNUSE(fp, l); 1137 return error; 1138 } 1139 #undef IF_NAME_LEN 1140 1141 int 1142 linux_ioctl_socket(l, uap, retval) 1143 struct lwp *l; 1144 struct linux_sys_ioctl_args /* { 1145 syscallarg(int) fd; 1146 syscallarg(u_long) com; 1147 syscallarg(void *) data; 1148 } */ *uap; 1149 register_t *retval; 1150 { 1151 struct proc *p = l->l_proc; 1152 u_long com; 1153 int error = 0, isdev = 0, dosys = 1; 1154 struct sys_ioctl_args ia; 1155 struct file *fp; 1156 struct filedesc *fdp; 1157 struct vnode *vp; 1158 int (*ioctlf)(struct file *, u_long, void *, struct lwp *); 1159 struct ioctl_pt pt; 1160 1161 fdp = p->p_fd; 1162 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1163 return (EBADF); 1164 1165 FILE_USE(fp); 1166 1167 if (fp->f_type == DTYPE_VNODE) { 1168 vp = (struct vnode *)fp->f_data; 1169 isdev = vp->v_type == VCHR; 1170 } 1171 1172 /* 1173 * Don't try to interpret socket ioctl calls that are done 1174 * on a device filedescriptor, just pass them through, to 1175 * emulate Linux behaviour. Use PTIOCLINUX so that the 1176 * device will only handle these if it's prepared to do 1177 * so, to avoid unexpected things from happening. 1178 */ 1179 if (isdev) { 1180 dosys = 0; 1181 ioctlf = fp->f_ops->fo_ioctl; 1182 pt.com = SCARG(uap, com); 1183 pt.data = SCARG(uap, data); 1184 error = ioctlf(fp, PTIOCLINUX, (void *)&pt, l); 1185 /* 1186 * XXX hack: if the function returns EJUSTRETURN, 1187 * it has stuffed a sysctl return value in pt.data. 1188 */ 1189 if (error == EJUSTRETURN) { 1190 retval[0] = (register_t)pt.data; 1191 error = 0; 1192 } 1193 goto out; 1194 } 1195 1196 com = SCARG(uap, com); 1197 retval[0] = 0; 1198 1199 switch (com) { 1200 case LINUX_SIOCGIFCONF: 1201 SCARG(&ia, com) = OOSIOCGIFCONF; 1202 break; 1203 case LINUX_SIOCGIFFLAGS: 1204 SCARG(&ia, com) = OSIOCGIFFLAGS; 1205 break; 1206 case LINUX_SIOCSIFFLAGS: 1207 SCARG(&ia, com) = OSIOCSIFFLAGS; 1208 break; 1209 case LINUX_SIOCGIFADDR: 1210 SCARG(&ia, com) = OOSIOCGIFADDR; 1211 break; 1212 case LINUX_SIOCGIFDSTADDR: 1213 SCARG(&ia, com) = OOSIOCGIFDSTADDR; 1214 break; 1215 case LINUX_SIOCGIFBRDADDR: 1216 SCARG(&ia, com) = OOSIOCGIFBRDADDR; 1217 break; 1218 case LINUX_SIOCGIFNETMASK: 1219 SCARG(&ia, com) = OOSIOCGIFNETMASK; 1220 break; 1221 case LINUX_SIOCADDMULTI: 1222 SCARG(&ia, com) = OSIOCADDMULTI; 1223 break; 1224 case LINUX_SIOCDELMULTI: 1225 SCARG(&ia, com) = OSIOCDELMULTI; 1226 break; 1227 case LINUX_SIOCGIFHWADDR: 1228 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1229 SCARG(uap, data)); 1230 dosys = 0; 1231 break; 1232 default: 1233 error = EINVAL; 1234 } 1235 1236 out: 1237 FILE_UNUSE(fp, l); 1238 1239 if (error ==0 && dosys) { 1240 SCARG(&ia, fd) = SCARG(uap, fd); 1241 SCARG(&ia, data) = SCARG(uap, data); 1242 /* XXX NJWLWP */ 1243 error = sys_ioctl(curlwp, &ia, retval); 1244 } 1245 1246 return error; 1247 } 1248 1249 int 1250 linux_sys_connect(l, v, retval) 1251 struct lwp *l; 1252 void *v; 1253 register_t *retval; 1254 { 1255 struct linux_sys_connect_args /* { 1256 syscallarg(int) s; 1257 syscallarg(const struct sockaddr *) name; 1258 syscallarg(int) namelen; 1259 } */ *uap = v; 1260 int error; 1261 struct mbuf *nam; 1262 1263 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1264 SCARG(uap, namelen)); 1265 if (error) 1266 return (error); 1267 1268 error = do_sys_connect(l, SCARG(uap, s), nam); 1269 1270 if (error == EISCONN) { 1271 struct file *fp; 1272 struct socket *so; 1273 int s, state, prflags; 1274 1275 /* getsock() will use the descriptor for us */ 1276 if (getsock(l->l_proc->p_fd, SCARG(uap, s), &fp) != 0) 1277 return EISCONN; 1278 1279 s = splsoftnet(); 1280 so = (struct socket *)fp->f_data; 1281 state = so->so_state; 1282 prflags = so->so_proto->pr_flags; 1283 splx(s); 1284 FILE_UNUSE(fp, l); 1285 /* 1286 * We should only let this call succeed once per 1287 * non-blocking connect; however we don't have 1288 * a convenient place to keep that state.. 1289 */ 1290 if ((state & SS_NBIO) && (state & SS_ISCONNECTED) && 1291 (prflags & PR_CONNREQUIRED)) 1292 return 0; 1293 } 1294 1295 return (error); 1296 } 1297 1298 int 1299 linux_sys_bind(l, v, retval) 1300 struct lwp *l; 1301 void *v; 1302 register_t *retval; 1303 { 1304 struct linux_sys_bind_args /* { 1305 syscallarg(int) s; 1306 syscallarg(const struct osockaddr *) name; 1307 syscallarg(int) namelen; 1308 } */ *uap = v; 1309 int error; 1310 struct mbuf *nam; 1311 1312 error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, name), 1313 SCARG(uap, namelen)); 1314 if (error) 1315 return (error); 1316 1317 return do_sys_bind(l, SCARG(uap, s), nam); 1318 } 1319 1320 int 1321 linux_sys_getsockname(l, v, retval) 1322 struct lwp *l; 1323 void *v; 1324 register_t *retval; 1325 { 1326 struct linux_sys_getsockname_args /* { 1327 syscallarg(int) fdes; 1328 syscallarg(void *) asa; 1329 syscallarg(int *) alen; 1330 } */ *uap = v; 1331 int error; 1332 1333 if ((error = sys_getsockname(l, uap, retval)) != 0) 1334 return (error); 1335 1336 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1337 return (error); 1338 1339 return (0); 1340 } 1341 1342 int 1343 linux_sys_getpeername(l, v, retval) 1344 struct lwp *l; 1345 void *v; 1346 register_t *retval; 1347 { 1348 struct sys_getpeername_args /* { 1349 syscallarg(int) fdes; 1350 syscallarg(void *) asa; 1351 syscallarg(int *) alen; 1352 } */ *uap = v; 1353 int error; 1354 1355 if ((error = sys_getpeername(l, uap, retval)) != 0) 1356 return (error); 1357 1358 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1359 return (error); 1360 1361 return (0); 1362 } 1363 1364 /* 1365 * Copy the osockaddr structure pointed to by osa to mbuf, adjust 1366 * family and convert to sockaddr. 1367 */ 1368 static int 1369 linux_get_sa(struct lwp *l, int s, struct mbuf **mp, const struct osockaddr *osa, int salen) 1370 { 1371 int error, bdom; 1372 struct sockaddr *sa; 1373 struct osockaddr *kosa; 1374 struct mbuf *m; 1375 1376 if (salen == 1 || salen > UCHAR_MAX) { 1377 DPRINTF(("bad osa=%p salen=%d\n", osa, salen)); 1378 return EINVAL; 1379 } 1380 1381 /* We'll need the address in an mbuf later, so copy into one here */ 1382 m = m_get(M_WAIT, MT_SONAME); 1383 if (salen > MLEN) 1384 MEXTMALLOC(m, salen, M_WAITOK); 1385 1386 m->m_len = salen; 1387 1388 if (salen == 0) 1389 return 0; 1390 1391 kosa = mtod(m, void *); 1392 if ((error = copyin(osa, kosa, salen))) { 1393 DPRINTF(("error %d copying osa %p len %d\n", 1394 error, osa, salen)); 1395 goto bad; 1396 } 1397 1398 ktrkuser("linux sockaddr", kosa, salen); 1399 1400 bdom = linux_to_bsd_domain(kosa->sa_family); 1401 if (bdom == -1) { 1402 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1403 error = EINVAL; 1404 goto bad; 1405 } 1406 1407 /* 1408 * If the family is unspecified, use address family of the socket. 1409 * This avoid triggering strict family checks in netinet/in_pcb.c et.al. 1410 */ 1411 if (bdom == AF_UNSPEC) { 1412 struct file *fp; 1413 struct socket *so; 1414 1415 /* getsock() will use the descriptor for us */ 1416 if ((error = getsock(l->l_proc->p_fd, s, &fp)) != 0) 1417 goto bad; 1418 1419 so = (struct socket *)fp->f_data; 1420 bdom = so->so_proto->pr_domain->dom_family; 1421 1422 FILE_UNUSE(fp, l); 1423 1424 DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom)); 1425 } 1426 1427 #ifdef INET6 1428 /* 1429 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1430 * which lacks the scope id compared with RFC2553 one. If we detect 1431 * the situation, reject the address and write a message to system log. 1432 * 1433 * Still accept addresses for which the scope id is not used. 1434 */ 1435 if (bdom == AF_INET6 && salen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1436 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)kosa; 1437 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && 1438 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 1439 IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || 1440 IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || 1441 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 1442 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1443 struct proc *p = l->l_proc; 1444 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1445 1446 log(LOG_DEBUG, 1447 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1448 "sockaddr_in6 rejected", 1449 p->p_pid, p->p_comm, uid); 1450 error = EINVAL; 1451 goto bad; 1452 } 1453 salen = sizeof (struct sockaddr_in6); 1454 sin6->sin6_scope_id = 0; 1455 } 1456 #endif 1457 1458 if (bdom == AF_INET) 1459 salen = sizeof(struct sockaddr_in); 1460 1461 sa = (struct sockaddr *) kosa; 1462 sa->sa_family = bdom; 1463 sa->sa_len = salen; 1464 m->m_len = salen; 1465 ktrkuser("new sockaddr", kosa, salen); 1466 1467 #ifdef DEBUG_LINUX 1468 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1469 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1470 DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom])); 1471 DPRINTF(("\n")); 1472 #endif 1473 1474 *mp = m; 1475 return 0; 1476 1477 bad: 1478 m_free(m); 1479 return error; 1480 } 1481 1482 static int 1483 linux_sa_put(osa) 1484 struct osockaddr *osa; 1485 { 1486 struct sockaddr sa; 1487 struct osockaddr *kosa; 1488 int error, bdom, len; 1489 1490 /* 1491 * Only read/write the sockaddr family and length part, the rest is 1492 * not changed. 1493 */ 1494 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1495 1496 error = copyin(osa, &sa, len); 1497 if (error) 1498 return (error); 1499 1500 bdom = bsd_to_linux_domain(sa.sa_family); 1501 if (bdom == -1) 1502 return (EINVAL); 1503 1504 /* Note: we convert from sockaddr to osockaddr here, too */ 1505 kosa = (struct osockaddr *) &sa; 1506 kosa->sa_family = bdom; 1507 error = copyout(kosa, osa, len); 1508 if (error) 1509 return (error); 1510 1511 return (0); 1512 } 1513 1514 #ifndef __amd64__ 1515 int 1516 linux_sys_recv(l, v, retval) 1517 struct lwp *l; 1518 void *v; 1519 register_t *retval; 1520 { 1521 struct linux_sys_recv_args /* { 1522 syscallarg(int) s; 1523 syscallarg(void *) buf; 1524 syscallarg(int) len; 1525 syscallarg(int) flags; 1526 } */ *uap = v; 1527 struct sys_recvfrom_args bra; 1528 1529 1530 SCARG(&bra, s) = SCARG(uap, s); 1531 SCARG(&bra, buf) = SCARG(uap, buf); 1532 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1533 SCARG(&bra, flags) = SCARG(uap, flags); 1534 SCARG(&bra, from) = NULL; 1535 SCARG(&bra, fromlenaddr) = NULL; 1536 1537 return (sys_recvfrom(l, &bra, retval)); 1538 } 1539 1540 int 1541 linux_sys_send(l, v, retval) 1542 struct lwp *l; 1543 void *v; 1544 register_t *retval; 1545 { 1546 struct linux_sys_send_args /* { 1547 syscallarg(int) s; 1548 syscallarg(void *) buf; 1549 syscallarg(int) len; 1550 syscallarg(int) flags; 1551 } */ *uap = v; 1552 struct sys_sendto_args bsa; 1553 1554 SCARG(&bsa, s) = SCARG(uap, s); 1555 SCARG(&bsa, buf) = SCARG(uap, buf); 1556 SCARG(&bsa, len) = SCARG(uap, len); 1557 SCARG(&bsa, flags) = SCARG(uap, flags); 1558 SCARG(&bsa, to) = NULL; 1559 SCARG(&bsa, tolen) = 0; 1560 1561 return (sys_sendto(l, &bsa, retval)); 1562 } 1563 #endif 1564 1565 int 1566 linux_sys_accept(l, v, retval) 1567 struct lwp *l; 1568 void *v; 1569 register_t *retval; 1570 { 1571 struct linux_sys_accept_args /* { 1572 syscallarg(int) s; 1573 syscallarg(struct osockaddr *) name; 1574 syscallarg(int *) anamelen; 1575 } */ *uap = v; 1576 int error; 1577 struct sys_accept_args baa; 1578 1579 SCARG(&baa, s) = SCARG(uap, s); 1580 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1581 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1582 1583 if ((error = sys_accept(l, &baa, retval))) 1584 return (error); 1585 1586 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1587 return (error); 1588 1589 return (0); 1590 } 1591