1 /* $NetBSD: linux_socket.c,v 1.70 2007/02/11 08:00:59 mlelstv 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 1.70 2007/02/11 08:00:59 mlelstv Exp $"); 46 47 #if defined(_KERNEL_OPT) 48 #include "opt_inet.h" 49 #endif 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 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 90 #include <compat/linux/common/linux_types.h> 91 #include <compat/linux/common/linux_util.h> 92 #include <compat/linux/common/linux_signal.h> 93 #include <compat/linux/common/linux_ioctl.h> 94 #include <compat/linux/common/linux_socket.h> 95 #if !defined(__alpha__) && !defined(__amd64__) 96 #include <compat/linux/common/linux_socketcall.h> 97 #endif 98 #include <compat/linux/common/linux_sockio.h> 99 100 #include <compat/linux/linux_syscallargs.h> 101 102 #ifdef DEBUG_LINUX 103 #define DPRINTF(a) uprintf a 104 #else 105 #define DPRINTF(a) 106 #endif 107 108 /* 109 * The calls in this file are entered either via the linux_socketcall() 110 * interface or, on the Alpha, as individual syscalls. The 111 * linux_socketcall function does any massaging of arguments so that all 112 * the calls in here need not think that they are anything other 113 * than a normal syscall. 114 */ 115 116 static int linux_to_bsd_domain __P((int)); 117 static int bsd_to_linux_domain __P((int)); 118 int linux_to_bsd_sopt_level __P((int)); 119 int linux_to_bsd_so_sockopt __P((int)); 120 int linux_to_bsd_ip_sockopt __P((int)); 121 int linux_to_bsd_tcp_sockopt __P((int)); 122 int linux_to_bsd_udp_sockopt __P((int)); 123 int linux_getifhwaddr __P((struct lwp *, register_t *, u_int, void *)); 124 static int linux_sa_get __P((struct lwp *, int, caddr_t *, struct sockaddr **, 125 const struct osockaddr *, socklen_t *)); 126 static int linux_sa_put __P((struct osockaddr *osa)); 127 static int linux_to_bsd_msg_flags __P((int)); 128 static int bsd_to_linux_msg_flags __P((int)); 129 130 static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { 131 AF_UNSPEC, 132 AF_UNIX, 133 AF_INET, 134 AF_CCITT, /* LINUX_AF_AX25 */ 135 AF_IPX, 136 AF_APPLETALK, 137 -1, /* LINUX_AF_NETROM */ 138 -1, /* LINUX_AF_BRIDGE */ 139 -1, /* LINUX_AF_ATMPVC */ 140 AF_CCITT, /* LINUX_AF_X25 */ 141 AF_INET6, 142 -1, /* LINUX_AF_ROSE */ 143 AF_DECnet, 144 -1, /* LINUX_AF_NETBEUI */ 145 -1, /* LINUX_AF_SECURITY */ 146 pseudo_AF_KEY, 147 AF_ROUTE, /* LINUX_AF_NETLINK */ 148 -1, /* LINUX_AF_PACKET */ 149 -1, /* LINUX_AF_ASH */ 150 -1, /* LINUX_AF_ECONET */ 151 -1, /* LINUX_AF_ATMSVC */ 152 AF_SNA, 153 /* rest up to LINUX_AF_MAX-1 is not allocated */ 154 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 155 }; 156 157 static const int bsd_to_linux_domain_[AF_MAX] = { 158 LINUX_AF_UNSPEC, 159 LINUX_AF_UNIX, 160 LINUX_AF_INET, 161 -1, /* AF_IMPLINK */ 162 -1, /* AF_PUP */ 163 -1, /* AF_CHAOS */ 164 -1, /* AF_NS */ 165 -1, /* AF_ISO */ 166 -1, /* AF_ECMA */ 167 -1, /* AF_DATAKIT */ 168 LINUX_AF_AX25, /* AF_CCITT */ 169 LINUX_AF_SNA, 170 LINUX_AF_DECnet, 171 -1, /* AF_DLI */ 172 -1, /* AF_LAT */ 173 -1, /* AF_HYLINK */ 174 LINUX_AF_APPLETALK, 175 LINUX_AF_NETLINK, 176 -1, /* AF_LINK */ 177 -1, /* AF_XTP */ 178 -1, /* AF_COIP */ 179 -1, /* AF_CNT */ 180 -1, /* pseudo_AF_RTIP */ 181 LINUX_AF_IPX, 182 LINUX_AF_INET6, 183 -1, /* pseudo_AF_PIP */ 184 -1, /* AF_ISDN */ 185 -1, /* AF_NATM */ 186 -1, /* AF_ARP */ 187 LINUX_pseudo_AF_KEY, 188 -1, /* pseudo_AF_HDRCMPLT */ 189 }; 190 191 static const struct { 192 int bfl; 193 int lfl; 194 } bsd_to_linux_msg_flags_[] = { 195 {MSG_OOB, LINUX_MSG_OOB}, 196 {MSG_PEEK, LINUX_MSG_PEEK}, 197 {MSG_DONTROUTE, LINUX_MSG_DONTROUTE}, 198 {MSG_EOR, LINUX_MSG_EOR}, 199 {MSG_TRUNC, LINUX_MSG_TRUNC}, 200 {MSG_CTRUNC, LINUX_MSG_CTRUNC}, 201 {MSG_WAITALL, LINUX_MSG_WAITALL}, 202 {MSG_DONTWAIT, LINUX_MSG_DONTWAIT}, 203 {MSG_BCAST, 0}, /* not supported, clear */ 204 {MSG_MCAST, 0}, /* not supported, clear */ 205 {-1, /* not supp */ LINUX_MSG_PROBE}, 206 {-1, /* not supp */ LINUX_MSG_FIN}, 207 {-1, /* not supp */ LINUX_MSG_SYN}, 208 {-1, /* not supp */ LINUX_MSG_CONFIRM}, 209 {-1, /* not supp */ LINUX_MSG_RST}, 210 {-1, /* not supp */ LINUX_MSG_ERRQUEUE}, 211 {-1, /* not supp */ LINUX_MSG_NOSIGNAL}, 212 {-1, /* not supp */ LINUX_MSG_MORE}, 213 }; 214 215 /* 216 * Convert between Linux and BSD socket domain values 217 */ 218 static int 219 linux_to_bsd_domain(ldom) 220 int ldom; 221 { 222 if (ldom < 0 || ldom >= LINUX_AF_MAX) 223 return (-1); 224 225 return linux_to_bsd_domain_[ldom]; 226 } 227 228 /* 229 * Convert between BSD and Linux socket domain values 230 */ 231 static int 232 bsd_to_linux_domain(bdom) 233 int bdom; 234 { 235 if (bdom < 0 || bdom >= AF_MAX) 236 return (-1); 237 238 return bsd_to_linux_domain_[bdom]; 239 } 240 241 static int 242 linux_to_bsd_msg_flags(lflag) 243 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(bflag) 271 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(l, v, retval) 299 struct lwp *l; 300 void *v; 301 register_t *retval; 302 { 303 struct linux_sys_socket_args /* { 304 syscallarg(int) domain; 305 syscallarg(int) type; 306 syscallarg(int) protocol; 307 } */ *uap = v; 308 struct compat_30_sys_socket_args bsa; 309 int error; 310 311 SCARG(&bsa, protocol) = SCARG(uap, protocol); 312 SCARG(&bsa, type) = SCARG(uap, type); 313 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 314 if (SCARG(&bsa, domain) == -1) 315 return EINVAL; 316 error = sys___socket30(l, &bsa, retval); 317 318 #ifdef INET6 319 /* 320 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 321 * default and some apps depend on this. So, set V6ONLY to 0 322 * for Linux apps if the sysctl value is set to 1. 323 */ 324 if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { 325 struct proc *p = l->l_proc; 326 struct file *fp; 327 328 if (getsock(p->p_fd, *retval, &fp) == 0) { 329 struct mbuf *m; 330 331 m = m_get(M_WAIT, MT_SOOPTS); 332 m->m_len = sizeof(int); 333 *mtod(m, int *) = 0; 334 335 /* ignore error */ 336 (void) sosetopt((struct socket *)fp->f_data, 337 IPPROTO_IPV6, IPV6_V6ONLY, m); 338 339 FILE_UNUSE(fp, l); 340 } 341 } 342 #endif 343 344 return (error); 345 } 346 347 int 348 linux_sys_socketpair(l, v, retval) 349 struct lwp *l; 350 void *v; 351 register_t *retval; 352 { 353 struct linux_sys_socketpair_args /* { 354 syscallarg(int) domain; 355 syscallarg(int) type; 356 syscallarg(int) protocol; 357 syscallarg(int *) rsv; 358 } */ *uap = v; 359 struct sys_socketpair_args bsa; 360 361 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 362 if (SCARG(&bsa, domain) == -1) 363 return EINVAL; 364 SCARG(&bsa, type) = SCARG(uap, type); 365 SCARG(&bsa, protocol) = SCARG(uap, protocol); 366 SCARG(&bsa, rsv) = SCARG(uap, rsv); 367 368 return sys_socketpair(l, &bsa, retval); 369 } 370 371 int 372 linux_sys_sendto(l, v, retval) 373 struct lwp *l; 374 void *v; 375 register_t *retval; 376 { 377 struct linux_sys_sendto_args /* { 378 syscallarg(int) s; 379 syscallarg(void *) msg; 380 syscallarg(int) len; 381 syscallarg(int) flags; 382 syscallarg(struct osockaddr *) to; 383 syscallarg(int) tolen; 384 } */ *uap = v; 385 struct proc *p = l->l_proc; 386 struct sys_sendto_args bsa; 387 socklen_t tolen; 388 389 SCARG(&bsa, s) = SCARG(uap, s); 390 SCARG(&bsa, buf) = SCARG(uap, msg); 391 SCARG(&bsa, len) = (size_t) SCARG(uap, len); 392 SCARG(&bsa, flags) = SCARG(uap, flags); 393 tolen = SCARG(uap, tolen); 394 if (SCARG(uap, to)) { 395 struct sockaddr *sa; 396 int error; 397 caddr_t sg = stackgap_init(p, 0); 398 399 error = linux_sa_get(l, SCARG(uap, s), &sg, &sa, 400 SCARG(uap, to), &tolen); 401 if (error) 402 return (error); 403 404 SCARG(&bsa, to) = sa; 405 } else 406 SCARG(&bsa, to) = NULL; 407 SCARG(&bsa, tolen) = tolen; 408 409 return (sys_sendto(l, &bsa, retval)); 410 } 411 412 int 413 linux_sys_sendmsg(l, v, retval) 414 struct lwp *l; 415 void *v; 416 register_t *retval; 417 { 418 struct linux_sys_sendmsg_args /* { 419 syscallarg(int) s; 420 syscallarg(struct msghdr *) msg; 421 syscallarg(u_int) flags; 422 } */ *uap = v; 423 struct proc *p = l->l_proc; 424 struct msghdr msg; 425 int error; 426 struct iovec aiov[UIO_SMALLIOV], *iov; 427 caddr_t sg = 0; 428 int bflags; 429 u_int8_t *control=NULL; 430 431 error = copyin(SCARG(uap, msg), (caddr_t)&msg, sizeof(msg)); 432 if (error) 433 return (error); 434 if ((unsigned int)msg.msg_iovlen > UIO_SMALLIOV) { 435 if ((unsigned int)msg.msg_iovlen > IOV_MAX) 436 return (EMSGSIZE); 437 iov = malloc(sizeof(struct iovec) * msg.msg_iovlen, 438 M_IOV, M_WAITOK); 439 } else 440 iov = aiov; 441 if ((unsigned int)msg.msg_iovlen > 0) { 442 error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 443 (size_t)(msg.msg_iovlen * sizeof(struct iovec))); 444 if (error) 445 goto done; 446 } 447 msg.msg_iov = iov; 448 msg.msg_flags = 0; 449 450 /* Convert the sockaddr if necessary */ 451 if (msg.msg_name) { 452 struct sockaddr *sa; 453 sg = stackgap_init(p, 0); 454 455 error = linux_sa_get(l, SCARG(uap, s), &sg, &sa, 456 (struct osockaddr *) msg.msg_name, &msg.msg_namelen); 457 if (error) 458 goto done; 459 msg.msg_name = sa; 460 } 461 462 /* 463 * Translate message flags. 464 */ 465 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 466 if (bflags < 0) { 467 /* Some supported flag */ 468 error = EINVAL; 469 goto done; 470 } 471 472 /* 473 * Handle cmsg if there is any. 474 */ 475 if (CMSG_FIRSTHDR(&msg)) { 476 struct cmsghdr cmsg, *cc; 477 int changed = 0; 478 ssize_t resid = msg.msg_controllen; 479 size_t clen, cidx = 0, cspace; 480 481 /* 482 * Limit the size even more than what sockargs() would do, 483 * We need to fit into stackgap space. 484 */ 485 if (msg.msg_controllen > (STACKGAPLEN / 2)) { 486 /* Sorry guys! */ 487 error = EMSGSIZE; 488 goto done; 489 } 490 491 control = malloc((clen = msg.msg_controllen), M_TEMP, M_WAITOK); 492 if (!control) { 493 error = ENOMEM; 494 goto done; 495 } 496 497 cc = CMSG_FIRSTHDR(&msg); 498 do { 499 error = copyin(cc, &cmsg, sizeof(cmsg)); 500 if (error) 501 goto done; 502 503 /* 504 * Sanity check the control message length. 505 */ 506 if (cmsg.cmsg_len > resid 507 || cmsg.cmsg_len < sizeof(struct cmsghdr)) { 508 error = EINVAL; 509 goto done; 510 } 511 512 /* 513 * Refuse unsupported control messages, and 514 * translate fields as appropriate. 515 */ 516 switch (cmsg.cmsg_level) { 517 case LINUX_SOL_SOCKET: 518 /* It only differs on some archs */ 519 if (LINUX_SOL_SOCKET != SOL_SOCKET) { 520 cmsg.cmsg_level = SOL_SOCKET; 521 changed = 1; 522 } 523 524 switch(cmsg.cmsg_type) { 525 case LINUX_SCM_RIGHTS: 526 /* Linux SCM_RIGHTS is same as NetBSD */ 527 break; 528 529 default: 530 /* other types not supported */ 531 error = EINVAL; 532 goto done; 533 } 534 break; 535 default: 536 /* pray and leave intact */ 537 break; 538 } 539 540 cspace = CMSG_SPACE(cmsg.cmsg_len - sizeof(cmsg)); 541 542 /* Check the buffer is big enough */ 543 if (__predict_false(cidx + cspace > clen)) { 544 u_int8_t *nc; 545 546 clen = cidx + cspace; 547 nc = realloc(control, clen, M_TEMP, M_WAITOK); 548 if (!nc) { 549 error = ENOMEM; 550 goto done; 551 } 552 control = nc; 553 } 554 555 /* Copy header */ 556 memcpy(&control[cidx], &cmsg, sizeof(cmsg)); 557 558 /* Zero are between header and data */ 559 memset(&control[cidx+sizeof(cmsg)], 0, 560 CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg)); 561 562 /* Copyin the data */ 563 error = copyin(LINUX_CMSG_DATA(cc), 564 CMSG_DATA(control), 565 cmsg.cmsg_len - sizeof(cmsg)); 566 if (error) 567 goto done; 568 569 /* 570 * If there is alignment difference, we changed 571 * layout of cmsg. 572 */ 573 if (LINUX_CMSG_ALIGNDIFF) 574 changed = 1; 575 576 resid -= cspace; 577 cidx += cspace; 578 } while ((cc = LINUX_CMSG_NXTHDR(&msg, cc)) && resid > 0); 579 580 /* 581 * If any of the passed control message needed 582 * a change, put the changed data into stackgap 583 * and adjust msg appropriately. 584 */ 585 if (changed) { 586 char *newc; 587 588 /* 589 * Check again the total len is maximum half of 590 * stackgap. The length might change if the 591 * alignment is different. 592 */ 593 if (clen > STACKGAPLEN/2) { 594 error = EMSGSIZE; 595 goto done; 596 } 597 598 /* 599 * Allocate space on stack within stackgap, and 600 * copy changed data there. 601 */ 602 if (!sg) 603 sg = stackgap_init(p, STACKGAPLEN/3); 604 newc = stackgap_alloc(p, &sg, clen); 605 if (!newc) { 606 error = ENOMEM; 607 goto done; 608 } 609 610 error = copyout(control, newc, clen); 611 if (error) 612 goto done; 613 614 msg.msg_control = newc; 615 msg.msg_controllen = clen; 616 } 617 618 free(control, M_TEMP); 619 control = NULL; 620 } 621 622 error = sendit(l, SCARG(uap, s), &msg, bflags, retval); 623 624 done: 625 if (control) 626 free(control, M_TEMP); 627 if (iov != aiov) 628 free(iov, M_IOV); 629 return (error); 630 } 631 632 int 633 linux_sys_recvfrom(l, v, retval) 634 struct lwp *l; 635 void *v; 636 register_t *retval; 637 { 638 struct linux_sys_recvfrom_args /* { 639 syscallarg(int) s; 640 syscallarg(void *) buf; 641 syscallarg(int) len; 642 syscallarg(int) flags; 643 syscallarg(struct osockaddr *) from; 644 syscallarg(int *) fromlenaddr; 645 } */ *uap = v; 646 int error; 647 struct sys_recvfrom_args bra; 648 649 SCARG(&bra, s) = SCARG(uap, s); 650 SCARG(&bra, buf) = SCARG(uap, buf); 651 SCARG(&bra, len) = SCARG(uap, len); 652 SCARG(&bra, flags) = SCARG(uap, flags); 653 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 654 SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); 655 656 if ((error = sys_recvfrom(l, &bra, retval))) 657 return (error); 658 659 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 660 return (error); 661 662 return (0); 663 } 664 665 int 666 linux_sys_recvmsg(l, v, retval) 667 struct lwp *l; 668 void *v; 669 register_t *retval; 670 { 671 struct linux_sys_recvmsg_args /* { 672 syscallarg(int) s; 673 syscallarg(struct msghdr *) msg; 674 syscallarg(u_int) flags; 675 } */ *uap = v; 676 struct msghdr msg; 677 int error; 678 struct sys_recvmsg_args bsa; 679 int lflags; 680 u_int8_t *ocontrol = NULL; /* XXX: gcc */ 681 socklen_t ocontrollen = 0; 682 683 /* 684 * Data alignment is different on some architectures. If control 685 * message is expected, we must arrange for the control message 686 * to be initially put elsewhere, and copy to target place 687 * with Linux alignment. 688 */ 689 if (LINUX_CMSG_ALIGNDIFF) { 690 error = copyin(SCARG(uap, msg), &msg, sizeof(msg)); 691 if (error) 692 return (error); 693 694 if (CMSG_FIRSTHDR(&msg)) { 695 caddr_t sg; 696 697 /* Need to fit within stackgap */ 698 if (msg.msg_controllen > STACKGAPLEN/2) { 699 /* Sorry guys! */ 700 return (EINVAL); 701 } 702 703 sg = stackgap_init(l->l_proc, STACKGAPLEN/3); 704 705 ocontrol = msg.msg_control; 706 ocontrollen = msg.msg_controllen; 707 708 /* space for at least one message's worth align */ 709 msg.msg_controllen += CMSG_ALIGN(1); 710 711 msg.msg_control = stackgap_alloc(l->l_proc, &sg, 712 msg.msg_controllen); 713 if (!msg.msg_control) 714 return (ENOMEM); 715 716 /* 717 * Okay to overwrite the original structure, it's 718 * supposed to be writable. 719 */ 720 error = copyout(&msg, SCARG(uap, msg), sizeof(msg)); 721 if (error) 722 return (error); 723 } 724 } 725 726 SCARG(&bsa, s) = SCARG(uap, s); 727 SCARG(&bsa, msg) = SCARG(uap, msg); 728 SCARG(&bsa, flags) = linux_to_bsd_msg_flags(SCARG(uap, flags)); 729 730 if (SCARG(&bsa, flags) < 0) { 731 /* Some unsupported flag */ 732 return (EINVAL); 733 } 734 735 if ((error = sys_recvmsg(l, &bsa, retval))) 736 goto done; 737 738 /* Fixup sockaddr */ 739 error = copyin((caddr_t)SCARG(uap, msg), (caddr_t)&msg, 740 sizeof(msg)); 741 if (error) 742 goto done; 743 744 if (msg.msg_name && msg.msg_namelen > 2) { 745 if ((error = linux_sa_put(msg.msg_name))) 746 goto done; 747 } 748 749 /* Fixup msg flags */ 750 lflags = bsd_to_linux_msg_flags(msg.msg_flags); 751 if (lflags < 0) { 752 /* Some flag unsupported by Linux */ 753 error = EINVAL; 754 goto done; 755 } 756 error = copyout(&lflags, (u_int8_t *) SCARG(uap, msg) + 757 offsetof(struct msghdr, msg_flags), sizeof(lflags)); 758 if (error) 759 goto done; 760 761 /* 762 * Fixup cmsg. We handle two things: 763 * 1. different values for level/type on some archs 764 * 2. different alignment of CMSG_DATA on some archs 765 */ 766 if (CMSG_FIRSTHDR(&msg)) { 767 struct cmsghdr cmsg, *cc; 768 int changed = 0; 769 size_t resid = ocontrollen; 770 771 cc = CMSG_FIRSTHDR(&msg); 772 do { 773 error = copyin(cc, &cmsg, sizeof(cmsg)); 774 if (error) 775 goto done; 776 777 switch (cmsg.cmsg_level) { 778 case SOL_SOCKET: 779 if (SOL_SOCKET != LINUX_SOL_SOCKET) { 780 cmsg.cmsg_level = LINUX_SOL_SOCKET; 781 changed = 1; 782 } 783 784 switch (cmsg.cmsg_type) { 785 case SCM_RIGHTS: 786 /* Linux SCM_RIGHTS is same as NetBSD */ 787 break; 788 789 default: 790 /* other types not supported */ 791 error = EINVAL; 792 goto done; 793 } 794 default: 795 /* pray and leave intact */ 796 break; 797 } 798 799 if (LINUX_CMSG_ALIGNDIFF) { 800 int i; 801 u_int8_t d, *sd, *td; 802 803 /* 804 * Sanity check. 805 */ 806 if (cmsg.cmsg_len > resid 807 || cmsg.cmsg_len < sizeof(cmsg)) { 808 error = EINVAL; 809 goto done; 810 } 811 812 /* 813 * Need to copy the cmsg from scratch area 814 * to the original place, converting data 815 * alignment from NetBSD to Linux one. 816 */ 817 error = copyout(&cmsg, ocontrol, sizeof(cmsg)); 818 if (error) 819 goto done; 820 /* zero pad */ 821 #if 0 822 for(i=0; i < LINUX_CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg); i++) { 823 copyout("",&ocontrol[sizeof(cmsg)+i],1); 824 } 825 #endif 826 827 sd = CMSG_DATA(cc); 828 td = LINUX_CMSG_DATA(ocontrol); 829 830 /* This is not particularily effective, but ..*/ 831 d = '\0'; 832 for(i=0; i < cmsg.cmsg_len - sizeof(cmsg); i++){ 833 copyin(sd++, &d, 1); 834 copyout(&d, td++, 1); 835 } 836 837 resid -= (td - ocontrol); 838 ocontrol = td; 839 } else if (changed) { 840 /* Update cmsghdr in-place */ 841 error = copyout(&cmsg, cc, sizeof(cmsg)); 842 if (error) 843 goto done; 844 changed = 0; 845 } 846 } while((cc = CMSG_NXTHDR(&msg, cc))); 847 } 848 849 done: 850 return (error); 851 } 852 853 /* 854 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 855 * is different, the rest matches IPPROTO_* on both systems. 856 */ 857 int 858 linux_to_bsd_sopt_level(llevel) 859 int llevel; 860 { 861 862 switch (llevel) { 863 case LINUX_SOL_SOCKET: 864 return SOL_SOCKET; 865 case LINUX_SOL_IP: 866 return IPPROTO_IP; 867 case LINUX_SOL_TCP: 868 return IPPROTO_TCP; 869 case LINUX_SOL_UDP: 870 return IPPROTO_UDP; 871 default: 872 return -1; 873 } 874 } 875 876 /* 877 * Convert Linux socket level socket option numbers to NetBSD values. 878 */ 879 int 880 linux_to_bsd_so_sockopt(lopt) 881 int lopt; 882 { 883 884 switch (lopt) { 885 case LINUX_SO_DEBUG: 886 return SO_DEBUG; 887 case LINUX_SO_REUSEADDR: 888 /* 889 * Linux does not implement SO_REUSEPORT, but allows reuse of a 890 * host:port pair through SO_REUSEADDR even if the address is not a 891 * multicast-address. Effectively, this means that we should use 892 * SO_REUSEPORT to allow Linux applications to not exit with 893 * EADDRINUSE 894 */ 895 return SO_REUSEPORT; 896 case LINUX_SO_TYPE: 897 return SO_TYPE; 898 case LINUX_SO_ERROR: 899 return SO_ERROR; 900 case LINUX_SO_DONTROUTE: 901 return SO_DONTROUTE; 902 case LINUX_SO_BROADCAST: 903 return SO_BROADCAST; 904 case LINUX_SO_SNDBUF: 905 return SO_SNDBUF; 906 case LINUX_SO_RCVBUF: 907 return SO_RCVBUF; 908 case LINUX_SO_KEEPALIVE: 909 return SO_KEEPALIVE; 910 case LINUX_SO_OOBINLINE: 911 return SO_OOBINLINE; 912 case LINUX_SO_LINGER: 913 return SO_LINGER; 914 case LINUX_SO_PRIORITY: 915 case LINUX_SO_NO_CHECK: 916 default: 917 return -1; 918 } 919 } 920 921 /* 922 * Convert Linux IP level socket option number to NetBSD values. 923 */ 924 int 925 linux_to_bsd_ip_sockopt(lopt) 926 int lopt; 927 { 928 929 switch (lopt) { 930 case LINUX_IP_TOS: 931 return IP_TOS; 932 case LINUX_IP_TTL: 933 return IP_TTL; 934 case LINUX_IP_MULTICAST_TTL: 935 return IP_MULTICAST_TTL; 936 case LINUX_IP_MULTICAST_LOOP: 937 return IP_MULTICAST_LOOP; 938 case LINUX_IP_MULTICAST_IF: 939 return IP_MULTICAST_IF; 940 case LINUX_IP_ADD_MEMBERSHIP: 941 return IP_ADD_MEMBERSHIP; 942 case LINUX_IP_DROP_MEMBERSHIP: 943 return IP_DROP_MEMBERSHIP; 944 default: 945 return -1; 946 } 947 } 948 949 /* 950 * Convert Linux TCP level socket option number to NetBSD values. 951 */ 952 int 953 linux_to_bsd_tcp_sockopt(lopt) 954 int lopt; 955 { 956 957 switch (lopt) { 958 case LINUX_TCP_NODELAY: 959 return TCP_NODELAY; 960 case LINUX_TCP_MAXSEG: 961 return TCP_MAXSEG; 962 default: 963 return -1; 964 } 965 } 966 967 /* 968 * Convert Linux UDP level socket option number to NetBSD values. 969 */ 970 int 971 linux_to_bsd_udp_sockopt(lopt) 972 int lopt; 973 { 974 975 switch (lopt) { 976 default: 977 return -1; 978 } 979 } 980 981 /* 982 * Another reasonably straightforward function: setsockopt(2). 983 * The level and option numbers are converted; the values passed 984 * are not (yet) converted, the ones currently implemented don't 985 * need conversion, as they are the same on both systems. 986 */ 987 int 988 linux_sys_setsockopt(l, v, retval) 989 struct lwp *l; 990 void *v; 991 register_t *retval; 992 { 993 struct linux_sys_setsockopt_args /* { 994 syscallarg(int) s; 995 syscallarg(int) level; 996 syscallarg(int) optname; 997 syscallarg(void *) optval; 998 syscallarg(int) optlen; 999 } */ *uap = v; 1000 struct proc *p = l->l_proc; 1001 struct sys_setsockopt_args bsa; 1002 int name; 1003 1004 SCARG(&bsa, s) = SCARG(uap, s); 1005 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 1006 SCARG(&bsa, val) = SCARG(uap, optval); 1007 SCARG(&bsa, valsize) = SCARG(uap, optlen); 1008 1009 /* 1010 * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets 1011 * and returns EOPNOTSUPP for other levels 1012 */ 1013 if (SCARG(&bsa, level) != SOL_SOCKET) { 1014 struct file *fp; 1015 struct socket *so; 1016 int error, s, family; 1017 1018 /* getsock() will use the descriptor for us */ 1019 if ((error = getsock(p->p_fd, SCARG(&bsa, s), &fp)) != 0) 1020 return error; 1021 1022 s = splsoftnet(); 1023 so = (struct socket *)fp->f_data; 1024 family = so->so_proto->pr_domain->dom_family; 1025 splx(s); 1026 FILE_UNUSE(fp, l); 1027 1028 if (family == AF_LOCAL) 1029 return EOPNOTSUPP; 1030 } 1031 1032 switch (SCARG(&bsa, level)) { 1033 case SOL_SOCKET: 1034 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1035 break; 1036 case IPPROTO_IP: 1037 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1038 break; 1039 case IPPROTO_TCP: 1040 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1041 break; 1042 case IPPROTO_UDP: 1043 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1044 break; 1045 default: 1046 return EINVAL; 1047 } 1048 1049 if (name == -1) 1050 return EINVAL; 1051 SCARG(&bsa, name) = name; 1052 1053 return sys_setsockopt(l, &bsa, retval); 1054 } 1055 1056 /* 1057 * getsockopt(2) is very much the same as setsockopt(2) (see above) 1058 */ 1059 int 1060 linux_sys_getsockopt(l, v, retval) 1061 struct lwp *l; 1062 void *v; 1063 register_t *retval; 1064 { 1065 struct linux_sys_getsockopt_args /* { 1066 syscallarg(int) s; 1067 syscallarg(int) level; 1068 syscallarg(int) optname; 1069 syscallarg(void *) optval; 1070 syscallarg(int *) optlen; 1071 } */ *uap = v; 1072 struct sys_getsockopt_args bga; 1073 int name; 1074 1075 SCARG(&bga, s) = SCARG(uap, s); 1076 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 1077 SCARG(&bga, val) = SCARG(uap, optval); 1078 SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); 1079 1080 switch (SCARG(&bga, level)) { 1081 case SOL_SOCKET: 1082 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1083 break; 1084 case IPPROTO_IP: 1085 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1086 break; 1087 case IPPROTO_TCP: 1088 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1089 break; 1090 case IPPROTO_UDP: 1091 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1092 break; 1093 default: 1094 return EINVAL; 1095 } 1096 1097 if (name == -1) 1098 return EINVAL; 1099 SCARG(&bga, name) = name; 1100 1101 return sys_getsockopt(l, &bga, retval); 1102 } 1103 1104 #define IF_NAME_LEN 16 1105 1106 int 1107 linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, 1108 void *data) 1109 { 1110 /* Not the full structure, just enough to map what we do here */ 1111 struct linux_ifreq { 1112 char if_name[IF_NAME_LEN]; 1113 struct osockaddr hwaddr; 1114 } lreq; 1115 struct proc *p = l->l_proc; 1116 struct filedesc *fdp; 1117 struct file *fp; 1118 struct ifaddr *ifa; 1119 struct ifnet *ifp; 1120 struct sockaddr_dl *sadl; 1121 int error, found; 1122 int index, ifnum; 1123 1124 /* 1125 * We can't emulate this ioctl by calling sys_ioctl() to run 1126 * SIOCGIFCONF, because the user buffer is not of the right 1127 * type to take those results. We can't use kernel buffers to 1128 * receive the results, as the implementation of sys_ioctl() 1129 * and ifconf() [which implements SIOCGIFCONF] use 1130 * copyin()/copyout() which will fail on kernel addresses. 1131 * 1132 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1133 */ 1134 1135 fdp = p->p_fd; 1136 if ((fp = fd_getfile(fdp, fd)) == NULL) 1137 return (EBADF); 1138 1139 FILE_USE(fp); 1140 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1141 error = EBADF; 1142 goto out; 1143 } 1144 1145 error = copyin(data, (caddr_t)&lreq, sizeof(lreq)); 1146 if (error) 1147 goto out; 1148 lreq.if_name[IF_NAME_LEN-1] = '\0'; /* just in case */ 1149 1150 /* 1151 * Try real interface name first, then fake "ethX" 1152 */ 1153 for (ifp = ifnet.tqh_first, found = 0; 1154 ifp != 0 && !found; 1155 ifp = ifp->if_list.tqe_next) { 1156 if (strcmp(lreq.if_name, ifp->if_xname)) 1157 /* not this interface */ 1158 continue; 1159 found=1; 1160 if ((ifa = ifp->if_addrlist.tqh_first) != 0) { 1161 for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 1162 sadl = (struct sockaddr_dl *)ifa->ifa_addr; 1163 /* only return ethernet addresses */ 1164 /* XXX what about FDDI, etc. ? */ 1165 if (sadl->sdl_family != AF_LINK || 1166 sadl->sdl_type != IFT_ETHER) 1167 continue; 1168 memcpy((caddr_t)&lreq.hwaddr.sa_data, 1169 LLADDR(sadl), 1170 MIN(sadl->sdl_alen, 1171 sizeof(lreq.hwaddr.sa_data))); 1172 lreq.hwaddr.sa_family = 1173 sadl->sdl_family; 1174 error = copyout((caddr_t)&lreq, data, 1175 sizeof(lreq)); 1176 goto out; 1177 } 1178 } else { 1179 error = ENODEV; 1180 goto out; 1181 } 1182 } 1183 1184 if (strncmp(lreq.if_name, "eth", 3) == 0) { 1185 for (ifnum = 0, index = 3; 1186 lreq.if_name[index] != '\0' && index < IF_NAME_LEN; 1187 index++) { 1188 ifnum *= 10; 1189 ifnum += lreq.if_name[index] - '0'; 1190 } 1191 1192 error = EINVAL; /* in case we don't find one */ 1193 for (ifp = ifnet.tqh_first, found = 0; 1194 ifp != 0 && !found; 1195 ifp = ifp->if_list.tqe_next) { 1196 memcpy(lreq.if_name, ifp->if_xname, 1197 MIN(IF_NAME_LEN, IFNAMSIZ)); 1198 if ((ifa = ifp->if_addrlist.tqh_first) == 0) 1199 /* no addresses on this interface */ 1200 continue; 1201 else 1202 for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 1203 sadl = (struct sockaddr_dl *)ifa->ifa_addr; 1204 /* only return ethernet addresses */ 1205 /* XXX what about FDDI, etc. ? */ 1206 if (sadl->sdl_family != AF_LINK || 1207 sadl->sdl_type != IFT_ETHER) 1208 continue; 1209 if (ifnum--) 1210 /* not the reqested iface */ 1211 continue; 1212 memcpy((caddr_t)&lreq.hwaddr.sa_data, 1213 LLADDR(sadl), 1214 MIN(sadl->sdl_alen, 1215 sizeof(lreq.hwaddr.sa_data))); 1216 lreq.hwaddr.sa_family = 1217 sadl->sdl_family; 1218 error = copyout((caddr_t)&lreq, data, 1219 sizeof(lreq)); 1220 found = 1; 1221 break; 1222 } 1223 } 1224 } else { 1225 /* unknown interface, not even an "eth*" name */ 1226 error = ENODEV; 1227 } 1228 1229 out: 1230 FILE_UNUSE(fp, l); 1231 return error; 1232 } 1233 #undef IF_NAME_LEN 1234 1235 int 1236 linux_ioctl_socket(l, uap, retval) 1237 struct lwp *l; 1238 struct linux_sys_ioctl_args /* { 1239 syscallarg(int) fd; 1240 syscallarg(u_long) com; 1241 syscallarg(caddr_t) data; 1242 } */ *uap; 1243 register_t *retval; 1244 { 1245 struct proc *p = l->l_proc; 1246 u_long com; 1247 int error = 0, isdev = 0, dosys = 1; 1248 struct sys_ioctl_args ia; 1249 struct file *fp; 1250 struct filedesc *fdp; 1251 struct vnode *vp; 1252 int (*ioctlf)(struct file *, u_long, void *, struct lwp *); 1253 struct ioctl_pt pt; 1254 1255 fdp = p->p_fd; 1256 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1257 return (EBADF); 1258 1259 FILE_USE(fp); 1260 1261 if (fp->f_type == DTYPE_VNODE) { 1262 vp = (struct vnode *)fp->f_data; 1263 isdev = vp->v_type == VCHR; 1264 } 1265 1266 /* 1267 * Don't try to interpret socket ioctl calls that are done 1268 * on a device filedescriptor, just pass them through, to 1269 * emulate Linux behaviour. Use PTIOCLINUX so that the 1270 * device will only handle these if it's prepared to do 1271 * so, to avoid unexpected things from happening. 1272 */ 1273 if (isdev) { 1274 dosys = 0; 1275 ioctlf = fp->f_ops->fo_ioctl; 1276 pt.com = SCARG(uap, com); 1277 pt.data = SCARG(uap, data); 1278 error = ioctlf(fp, PTIOCLINUX, (caddr_t)&pt, l); 1279 /* 1280 * XXX hack: if the function returns EJUSTRETURN, 1281 * it has stuffed a sysctl return value in pt.data. 1282 */ 1283 if (error == EJUSTRETURN) { 1284 retval[0] = (register_t)pt.data; 1285 error = 0; 1286 } 1287 goto out; 1288 } 1289 1290 com = SCARG(uap, com); 1291 retval[0] = 0; 1292 1293 switch (com) { 1294 case LINUX_SIOCGIFCONF: 1295 SCARG(&ia, com) = OSIOCGIFCONF; 1296 break; 1297 case LINUX_SIOCGIFFLAGS: 1298 SCARG(&ia, com) = SIOCGIFFLAGS; 1299 break; 1300 case LINUX_SIOCSIFFLAGS: 1301 SCARG(&ia, com) = SIOCSIFFLAGS; 1302 break; 1303 case LINUX_SIOCGIFADDR: 1304 SCARG(&ia, com) = OSIOCGIFADDR; 1305 break; 1306 case LINUX_SIOCGIFDSTADDR: 1307 SCARG(&ia, com) = OSIOCGIFDSTADDR; 1308 break; 1309 case LINUX_SIOCGIFBRDADDR: 1310 SCARG(&ia, com) = OSIOCGIFBRDADDR; 1311 break; 1312 case LINUX_SIOCGIFNETMASK: 1313 SCARG(&ia, com) = OSIOCGIFNETMASK; 1314 break; 1315 case LINUX_SIOCADDMULTI: 1316 SCARG(&ia, com) = SIOCADDMULTI; 1317 break; 1318 case LINUX_SIOCDELMULTI: 1319 SCARG(&ia, com) = SIOCDELMULTI; 1320 break; 1321 case LINUX_SIOCGIFHWADDR: 1322 error = linux_getifhwaddr(l, retval, SCARG(uap, fd), 1323 SCARG(uap, data)); 1324 dosys = 0; 1325 break; 1326 default: 1327 error = EINVAL; 1328 } 1329 1330 out: 1331 FILE_UNUSE(fp, l); 1332 1333 if (error ==0 && dosys) { 1334 SCARG(&ia, fd) = SCARG(uap, fd); 1335 SCARG(&ia, data) = SCARG(uap, data); 1336 /* XXX NJWLWP */ 1337 error = sys_ioctl(curlwp, &ia, retval); 1338 } 1339 1340 return error; 1341 } 1342 1343 int 1344 linux_sys_connect(l, v, retval) 1345 struct lwp *l; 1346 void *v; 1347 register_t *retval; 1348 { 1349 struct linux_sys_connect_args /* { 1350 syscallarg(int) s; 1351 syscallarg(const struct sockaddr *) name; 1352 syscallarg(int) namelen; 1353 } */ *uap = v; 1354 struct proc *p = l->l_proc; 1355 int error; 1356 struct sockaddr *sa; 1357 struct sys_connect_args bca; 1358 caddr_t sg = stackgap_init(p, 0); 1359 socklen_t namlen; 1360 1361 namlen = SCARG(uap, namelen); 1362 error = linux_sa_get(l, SCARG(uap, s), &sg, &sa, 1363 SCARG(uap, name), &namlen); 1364 if (error) 1365 return (error); 1366 1367 SCARG(&bca, s) = SCARG(uap, s); 1368 SCARG(&bca, name) = sa; 1369 SCARG(&bca, namelen) = namlen; 1370 1371 error = sys_connect(l, &bca, retval); 1372 1373 if (error == EISCONN) { 1374 struct file *fp; 1375 struct socket *so; 1376 int s, state, prflags; 1377 1378 /* getsock() will use the descriptor for us */ 1379 if (getsock(p->p_fd, SCARG(uap, s), &fp) != 0) 1380 return EISCONN; 1381 1382 s = splsoftnet(); 1383 so = (struct socket *)fp->f_data; 1384 state = so->so_state; 1385 prflags = so->so_proto->pr_flags; 1386 splx(s); 1387 FILE_UNUSE(fp, l); 1388 /* 1389 * We should only let this call succeed once per 1390 * non-blocking connect; however we don't have 1391 * a convenient place to keep that state.. 1392 */ 1393 if ((state & SS_NBIO) && (state & SS_ISCONNECTED) && 1394 (prflags & PR_CONNREQUIRED)) 1395 return 0; 1396 } 1397 1398 return (error); 1399 } 1400 1401 int 1402 linux_sys_bind(l, v, retval) 1403 struct lwp *l; 1404 void *v; 1405 register_t *retval; 1406 { 1407 struct linux_sys_bind_args /* { 1408 syscallarg(int) s; 1409 syscallarg(const struct osockaddr *) name; 1410 syscallarg(int) namelen; 1411 } */ *uap = v; 1412 struct proc *p = l->l_proc; 1413 int error; 1414 socklen_t namlen; 1415 struct sys_bind_args bsa; 1416 1417 namlen = SCARG(uap, namelen); 1418 SCARG(&bsa, s) = SCARG(uap, s); 1419 if (SCARG(uap, name)) { 1420 struct sockaddr *sa; 1421 caddr_t sg = stackgap_init(p, 0); 1422 1423 error = linux_sa_get(l, SCARG(uap, s), &sg, &sa, 1424 SCARG(uap, name), &namlen); 1425 if (error) 1426 return (error); 1427 1428 SCARG(&bsa, name) = sa; 1429 } else 1430 SCARG(&bsa, name) = NULL; 1431 SCARG(&bsa, namelen) = namlen; 1432 1433 return (sys_bind(l, &bsa, retval)); 1434 } 1435 1436 int 1437 linux_sys_getsockname(l, v, retval) 1438 struct lwp *l; 1439 void *v; 1440 register_t *retval; 1441 { 1442 struct linux_sys_getsockname_args /* { 1443 syscallarg(int) fdes; 1444 syscallarg(caddr_t) asa; 1445 syscallarg(int *) alen; 1446 } */ *uap = v; 1447 int error; 1448 1449 if ((error = sys_getsockname(l, uap, retval)) != 0) 1450 return (error); 1451 1452 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1453 return (error); 1454 1455 return (0); 1456 } 1457 1458 int 1459 linux_sys_getpeername(l, v, retval) 1460 struct lwp *l; 1461 void *v; 1462 register_t *retval; 1463 { 1464 struct sys_getpeername_args /* { 1465 syscallarg(int) fdes; 1466 syscallarg(caddr_t) asa; 1467 syscallarg(int *) alen; 1468 } */ *uap = v; 1469 int error; 1470 1471 if ((error = sys_getpeername(l, uap, retval)) != 0) 1472 return (error); 1473 1474 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1475 return (error); 1476 1477 return (0); 1478 } 1479 1480 /* 1481 * Copy the osockaddr structure pointed to by osa to kernel, adjust 1482 * family and convert to sockaddr, allocate stackgap and put the 1483 * the converted structure there, address on stackgap returned in sap. 1484 */ 1485 static int 1486 linux_sa_get(l, s, sgp, sap, osa, osalen) 1487 struct lwp *l; 1488 int s; 1489 caddr_t *sgp; 1490 struct sockaddr **sap; 1491 const struct osockaddr *osa; 1492 socklen_t *osalen; 1493 { 1494 int error=0, bdom; 1495 struct sockaddr *sa, *usa; 1496 struct osockaddr *kosa = (struct osockaddr *) &sa; 1497 struct proc *p = l->l_proc; 1498 socklen_t alloclen; 1499 #ifdef INET6 1500 int oldv6size; 1501 struct sockaddr_in6 *sin6; 1502 #endif 1503 1504 if (*osalen < 2 || *osalen > UCHAR_MAX || !osa) { 1505 DPRINTF(("bad osa=%p osalen=%d\n", osa, *osalen)); 1506 return (EINVAL); 1507 } 1508 1509 alloclen = *osalen; 1510 #ifdef INET6 1511 oldv6size = 0; 1512 /* 1513 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it 1514 * if it's a v4-mapped address, so reserve the proper space 1515 * for it. 1516 */ 1517 if (alloclen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1518 alloclen = sizeof (struct sockaddr_in6); 1519 oldv6size = 1; 1520 } 1521 #endif 1522 1523 kosa = (struct osockaddr *) malloc(alloclen, M_TEMP, M_WAITOK); 1524 1525 if ((error = copyin(osa, (caddr_t) kosa, *osalen))) { 1526 DPRINTF(("error copying osa %d\n", error)); 1527 goto out; 1528 } 1529 1530 bdom = linux_to_bsd_domain(kosa->sa_family); 1531 if (bdom == -1) { 1532 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1533 error = EINVAL; 1534 goto out; 1535 } 1536 1537 #ifdef INET6 1538 /* 1539 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1540 * which lacks the scope id compared with RFC2553 one. If we detect 1541 * the situation, reject the address and write a message to system log. 1542 * 1543 * Still accept addresses for which the scope id is not used. 1544 */ 1545 if (oldv6size && bdom == AF_INET6) { 1546 sin6 = (struct sockaddr_in6 *)kosa; 1547 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 1548 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 1549 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 1550 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && 1551 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1552 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1553 sin6->sin6_scope_id = 0; 1554 } else { 1555 int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; 1556 1557 log(LOG_DEBUG, 1558 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1559 "sockaddr_in6 rejected", 1560 p->p_pid, p->p_comm, uid); 1561 error = EINVAL; 1562 goto out; 1563 } 1564 } 1565 #endif 1566 1567 /* 1568 * If the family is unspecified, use address family of the 1569 * socket. This avoid triggering COMPAT_43 struct socket family check 1570 * in sockargs() on little-endian machines, and strict family checks 1571 * in netinet/in_pcb.c et.al. 1572 */ 1573 if (bdom == AF_UNSPEC) { 1574 struct file *fp; 1575 struct socket *so; 1576 1577 /* getsock() will use the descriptor for us */ 1578 if ((error = getsock(p->p_fd, s, &fp)) != 0) 1579 goto out; 1580 1581 so = (struct socket *)fp->f_data; 1582 bdom = so->so_proto->pr_domain->dom_family; 1583 1584 FILE_UNUSE(fp, l); 1585 1586 DPRINTF(("AF_UNSPEC family adjusted to %d\n", bdom)); 1587 } 1588 1589 if (bdom == AF_INET) { 1590 alloclen = sizeof(struct sockaddr_in); 1591 } 1592 1593 sa = (struct sockaddr *) kosa; 1594 sa->sa_family = bdom; 1595 sa->sa_len = alloclen; 1596 #ifdef DEBUG_LINUX 1597 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1598 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1599 DPRINTF(("%02x ", (unsigned char) sa->sa_data[bdom])); 1600 DPRINTF(("\n")); 1601 #endif 1602 1603 usa = (struct sockaddr *) stackgap_alloc(p, sgp, alloclen); 1604 if (!usa) { 1605 error = ENOMEM; 1606 goto out; 1607 } 1608 1609 if ((error = copyout(sa, usa, alloclen))) { 1610 DPRINTF(("error copying out socket %d\n", error)); 1611 goto out; 1612 } 1613 1614 *sap = usa; 1615 1616 out: 1617 *osalen = alloclen; 1618 free(kosa, M_TEMP); 1619 return (error); 1620 } 1621 1622 static int 1623 linux_sa_put(osa) 1624 struct osockaddr *osa; 1625 { 1626 struct sockaddr sa; 1627 struct osockaddr *kosa; 1628 int error, bdom, len; 1629 1630 /* 1631 * Only read/write the sockaddr family and length part, the rest is 1632 * not changed. 1633 */ 1634 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1635 1636 error = copyin((caddr_t) osa, (caddr_t) &sa, len); 1637 if (error) 1638 return (error); 1639 1640 bdom = bsd_to_linux_domain(sa.sa_family); 1641 if (bdom == -1) 1642 return (EINVAL); 1643 1644 /* Note: we convert from sockaddr to osockaddr here, too */ 1645 kosa = (struct osockaddr *) &sa; 1646 kosa->sa_family = bdom; 1647 error = copyout(kosa, osa, len); 1648 if (error) 1649 return (error); 1650 1651 return (0); 1652 } 1653 1654 #ifndef __amd64__ 1655 int 1656 linux_sys_recv(l, v, retval) 1657 struct lwp *l; 1658 void *v; 1659 register_t *retval; 1660 { 1661 struct linux_sys_recv_args /* { 1662 syscallarg(int) s; 1663 syscallarg(void *) buf; 1664 syscallarg(int) len; 1665 syscallarg(int) flags; 1666 } */ *uap = v; 1667 struct sys_recvfrom_args bra; 1668 1669 1670 SCARG(&bra, s) = SCARG(uap, s); 1671 SCARG(&bra, buf) = SCARG(uap, buf); 1672 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1673 SCARG(&bra, flags) = SCARG(uap, flags); 1674 SCARG(&bra, from) = NULL; 1675 SCARG(&bra, fromlenaddr) = NULL; 1676 1677 return (sys_recvfrom(l, &bra, retval)); 1678 } 1679 1680 int 1681 linux_sys_send(l, v, retval) 1682 struct lwp *l; 1683 void *v; 1684 register_t *retval; 1685 { 1686 struct linux_sys_send_args /* { 1687 syscallarg(int) s; 1688 syscallarg(caddr_t) buf; 1689 syscallarg(int) len; 1690 syscallarg(int) flags; 1691 } */ *uap = v; 1692 struct sys_sendto_args bsa; 1693 1694 SCARG(&bsa, s) = SCARG(uap, s); 1695 SCARG(&bsa, buf) = SCARG(uap, buf); 1696 SCARG(&bsa, len) = SCARG(uap, len); 1697 SCARG(&bsa, flags) = SCARG(uap, flags); 1698 SCARG(&bsa, to) = NULL; 1699 SCARG(&bsa, tolen) = 0; 1700 1701 return (sys_sendto(l, &bsa, retval)); 1702 } 1703 #endif 1704 1705 int 1706 linux_sys_accept(l, v, retval) 1707 struct lwp *l; 1708 void *v; 1709 register_t *retval; 1710 { 1711 struct linux_sys_accept_args /* { 1712 syscallarg(int) s; 1713 syscallarg(struct osockaddr *) name; 1714 syscallarg(int *) anamelen; 1715 } */ *uap = v; 1716 int error; 1717 struct sys_accept_args baa; 1718 1719 SCARG(&baa, s) = SCARG(uap, s); 1720 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1721 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1722 1723 if ((error = sys_accept(l, &baa, retval))) 1724 return (error); 1725 1726 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1727 return (error); 1728 1729 return (0); 1730 } 1731