1 /* $NetBSD: linux_socket.c,v 1.50 2003/10/25 18:38:42 christos 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 1.50 2003/10/25 18:38:42 christos 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 <net/if.h> 64 #include <net/if_dl.h> 65 #include <net/if_types.h> 66 #include <netinet/in.h> 67 #include <netinet/tcp.h> 68 #include <sys/mount.h> 69 #include <sys/proc.h> 70 #include <sys/vnode.h> 71 #include <sys/device.h> 72 #include <sys/protosw.h> 73 #include <sys/mbuf.h> 74 #include <sys/syslog.h> 75 #include <sys/exec.h> 76 77 #include <sys/sa.h> 78 #include <sys/syscallargs.h> 79 80 #ifdef INET6 81 #include <netinet/ip6.h> 82 #include <netinet6/ip6_var.h> 83 #endif 84 85 #include <compat/linux/common/linux_types.h> 86 #include <compat/linux/common/linux_util.h> 87 #include <compat/linux/common/linux_signal.h> 88 #include <compat/linux/common/linux_ioctl.h> 89 #include <compat/linux/common/linux_socket.h> 90 #include <compat/linux/common/linux_socketcall.h> 91 #include <compat/linux/common/linux_sockio.h> 92 93 #include <compat/linux/linux_syscallargs.h> 94 95 #ifdef DEBUG_LINUX 96 #define DPRINTF(a) uprintf a 97 #else 98 #define DPRINTF(a) 99 #endif 100 101 /* 102 * The calls in this file are entered either via the linux_socketcall() 103 * interface or, on the Alpha, as individual syscalls. The 104 * linux_socketcall function does any massaging of arguments so that all 105 * the calls in here need not think that they are anything other 106 * than a normal syscall. 107 */ 108 109 static int linux_to_bsd_domain __P((int)); 110 static int bsd_to_linux_domain __P((int)); 111 int linux_to_bsd_sopt_level __P((int)); 112 int linux_to_bsd_so_sockopt __P((int)); 113 int linux_to_bsd_ip_sockopt __P((int)); 114 int linux_to_bsd_tcp_sockopt __P((int)); 115 int linux_to_bsd_udp_sockopt __P((int)); 116 int linux_getifhwaddr __P((struct proc *, register_t *, u_int, void *)); 117 static int linux_sa_get __P((struct proc *, caddr_t *sgp, struct sockaddr **sap, 118 const struct osockaddr *osa, int *osalen)); 119 static int linux_sa_put __P((struct osockaddr *osa)); 120 static int linux_to_bsd_msg_flags __P((int)); 121 static int bsd_to_linux_msg_flags __P((int)); 122 123 static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { 124 AF_UNSPEC, 125 AF_UNIX, 126 AF_INET, 127 AF_CCITT, /* LINUX_AF_AX25 */ 128 AF_IPX, 129 AF_APPLETALK, 130 -1, /* LINUX_AF_NETROM */ 131 -1, /* LINUX_AF_BRIDGE */ 132 -1, /* LINUX_AF_ATMPVC */ 133 AF_CCITT, /* LINUX_AF_X25 */ 134 AF_INET6, 135 -1, /* LINUX_AF_ROSE */ 136 AF_DECnet, 137 -1, /* LINUX_AF_NETBEUI */ 138 -1, /* LINUX_AF_SECURITY */ 139 pseudo_AF_KEY, 140 AF_ROUTE, /* LINUX_AF_NETLINK */ 141 -1, /* LINUX_AF_PACKET */ 142 -1, /* LINUX_AF_ASH */ 143 -1, /* LINUX_AF_ECONET */ 144 -1, /* LINUX_AF_ATMSVC */ 145 AF_SNA, 146 /* rest up to LINUX_AF_MAX-1 is not allocated */ 147 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 148 }; 149 150 static const int bsd_to_linux_domain_[AF_MAX] = { 151 LINUX_AF_UNSPEC, 152 LINUX_AF_UNIX, 153 LINUX_AF_INET, 154 -1, /* AF_IMPLINK */ 155 -1, /* AF_PUP */ 156 -1, /* AF_CHAOS */ 157 -1, /* AF_NS */ 158 -1, /* AF_ISO */ 159 -1, /* AF_ECMA */ 160 -1, /* AF_DATAKIT */ 161 LINUX_AF_AX25, /* AF_CCITT */ 162 LINUX_AF_SNA, 163 LINUX_AF_DECnet, 164 -1, /* AF_DLI */ 165 -1, /* AF_LAT */ 166 -1, /* AF_HYLINK */ 167 LINUX_AF_APPLETALK, 168 LINUX_AF_NETLINK, 169 -1, /* AF_LINK */ 170 -1, /* AF_XTP */ 171 -1, /* AF_COIP */ 172 -1, /* AF_CNT */ 173 -1, /* pseudo_AF_RTIP */ 174 LINUX_AF_IPX, 175 LINUX_AF_INET6, 176 -1, /* pseudo_AF_PIP */ 177 -1, /* AF_ISDN */ 178 -1, /* AF_NATM */ 179 -1, /* AF_ARP */ 180 LINUX_pseudo_AF_KEY, 181 -1, /* pseudo_AF_HDRCMPLT */ 182 }; 183 184 static const int bsd_to_linux_msg_flags_[] = { 185 MSG_OOB, LINUX_MSG_OOB, 186 MSG_PEEK, LINUX_MSG_PEEK, 187 MSG_DONTROUTE, LINUX_MSG_DONTROUTE, 188 MSG_EOR, LINUX_MSG_EOR, 189 MSG_TRUNC, LINUX_MSG_TRUNC, 190 MSG_CTRUNC, LINUX_MSG_CTRUNC, 191 MSG_WAITALL, LINUX_MSG_WAITALL, 192 MSG_DONTWAIT, LINUX_MSG_DONTWAIT, 193 MSG_BCAST, 0, /* not supported, clear */ 194 MSG_MCAST, 0, /* not supported, clear */ 195 -1, /* not supp */ LINUX_MSG_PROBE, 196 -1, /* not supp */ LINUX_MSG_FIN, 197 -1, /* not supp */ LINUX_MSG_SYN, 198 -1, /* not supp */ LINUX_MSG_CONFIRM, 199 -1, /* not supp */ LINUX_MSG_RST, 200 -1, /* not supp */ LINUX_MSG_ERRQUEUE, 201 -1, /* not supp */ LINUX_MSG_NOSIGNAL, 202 -1, /* not supp */ LINUX_MSG_MORE, 203 }; 204 205 /* 206 * Convert between Linux and BSD socket domain values 207 */ 208 static int 209 linux_to_bsd_domain(ldom) 210 int ldom; 211 { 212 if (ldom < 0 || ldom >= LINUX_AF_MAX) 213 return (-1); 214 215 return linux_to_bsd_domain_[ldom]; 216 } 217 218 /* 219 * Convert between BSD and Linux socket domain values 220 */ 221 static int 222 bsd_to_linux_domain(bdom) 223 int bdom; 224 { 225 if (bdom < 0 || bdom >= AF_MAX) 226 return (-1); 227 228 return bsd_to_linux_domain_[bdom]; 229 } 230 231 static int 232 linux_to_bsd_msg_flags(lflag) 233 int lflag; 234 { 235 int i, lfl, bfl; 236 int bflag = 0; 237 238 if (lflag == 0) 239 return (0); 240 241 for(i=0; i < sizeof(bsd_to_linux_msg_flags_)/2; i += 2) { 242 bfl = bsd_to_linux_msg_flags_[i]; 243 lfl = bsd_to_linux_msg_flags_[i+1]; 244 245 if (lfl == 0) 246 continue; 247 248 if (lflag & lfl) { 249 if (bfl < 0) 250 return (-1); 251 252 bflag |= bfl; 253 } 254 } 255 256 return (bflag); 257 } 258 259 static int 260 bsd_to_linux_msg_flags(bflag) 261 int bflag; 262 { 263 int i, lfl, bfl; 264 int lflag = 0; 265 266 if (bflag == 0) 267 return (0); 268 269 for(i=0; i < sizeof(bsd_to_linux_msg_flags_)/2; i += 2) { 270 bfl = bsd_to_linux_msg_flags_[i]; 271 lfl = bsd_to_linux_msg_flags_[i+1]; 272 273 if (bfl <= 0) 274 continue; 275 276 if (bflag & bfl) { 277 if (lfl < 0) 278 return (-1); 279 280 lflag |= lfl; 281 } 282 } 283 284 return (lflag); 285 } 286 287 int 288 linux_sys_socket(l, v, retval) 289 struct lwp *l; 290 void *v; 291 register_t *retval; 292 { 293 struct linux_sys_socket_args /* { 294 syscallarg(int) domain; 295 syscallarg(int) type; 296 syscallarg(int) protocol; 297 } */ *uap = v; 298 struct sys_socket_args bsa; 299 int error; 300 301 SCARG(&bsa, protocol) = SCARG(uap, protocol); 302 SCARG(&bsa, type) = SCARG(uap, type); 303 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 304 if (SCARG(&bsa, domain) == -1) 305 return EINVAL; 306 error = sys_socket(l, &bsa, retval); 307 308 #ifdef INET6 309 /* 310 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 311 * default and some apps depend on this. So, set V6ONLY to 0 312 * for Linux apps if the sysctl value is set to 1. 313 */ 314 if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { 315 struct proc *p = l->l_proc; 316 struct file *fp; 317 318 if (getsock(p->p_fd, *retval, &fp) == 0) { 319 struct mbuf *m; 320 321 m = m_get(M_WAIT, MT_SOOPTS); 322 m->m_len = sizeof(int); 323 *mtod(m, int *) = 0; 324 325 /* ignore error */ 326 (void) sosetopt((struct socket *)fp->f_data, 327 IPPROTO_IPV6, IPV6_V6ONLY, m); 328 329 FILE_UNUSE(fp, p); 330 } 331 } 332 #endif 333 334 return (error); 335 } 336 337 int 338 linux_sys_socketpair(l, v, retval) 339 struct lwp *l; 340 void *v; 341 register_t *retval; 342 { 343 struct linux_sys_socketpair_args /* { 344 syscallarg(int) domain; 345 syscallarg(int) type; 346 syscallarg(int) protocol; 347 syscallarg(int *) rsv; 348 } */ *uap = v; 349 struct sys_socketpair_args bsa; 350 351 SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); 352 if (SCARG(&bsa, domain) == -1) 353 return EINVAL; 354 SCARG(&bsa, type) = SCARG(uap, type); 355 SCARG(&bsa, protocol) = SCARG(uap, protocol); 356 SCARG(&bsa, rsv) = SCARG(uap, rsv); 357 358 return sys_socketpair(l, &bsa, retval); 359 } 360 361 int 362 linux_sys_sendto(l, v, retval) 363 struct lwp *l; 364 void *v; 365 register_t *retval; 366 { 367 struct linux_sys_sendto_args /* { 368 syscallarg(int) s; 369 syscallarg(void *) msg; 370 syscallarg(int) len; 371 syscallarg(int) flags; 372 syscallarg(struct osockaddr *) to; 373 syscallarg(int) tolen; 374 } */ *uap = v; 375 struct proc *p = l->l_proc; 376 struct sys_sendto_args bsa; 377 int tolen; 378 379 SCARG(&bsa, s) = SCARG(uap, s); 380 SCARG(&bsa, buf) = SCARG(uap, msg); 381 SCARG(&bsa, len) = (size_t) SCARG(uap, len); 382 SCARG(&bsa, flags) = SCARG(uap, flags); 383 tolen = SCARG(uap, tolen); 384 if (SCARG(uap, to)) { 385 struct sockaddr *sa; 386 int error; 387 caddr_t sg = stackgap_init(p, 0); 388 389 if ((error = linux_sa_get(p, &sg, &sa, SCARG(uap, to), &tolen))) 390 return (error); 391 392 SCARG(&bsa, to) = sa; 393 } else 394 SCARG(&bsa, to) = NULL; 395 SCARG(&bsa, tolen) = tolen; 396 397 return (sys_sendto(l, &bsa, retval)); 398 } 399 400 int 401 linux_sys_sendmsg(l, v, retval) 402 struct lwp *l; 403 void *v; 404 register_t *retval; 405 { 406 struct linux_sys_sendmsg_args /* { 407 syscallarg(int) s; 408 syscallarg(struct msghdr *) msg; 409 syscallarg(u_int) flags; 410 } */ *uap = v; 411 struct proc *p = l->l_proc; 412 struct msghdr msg; 413 int error; 414 struct iovec aiov[UIO_SMALLIOV], *iov; 415 caddr_t sg = 0; 416 int bflags; 417 u_int8_t *control=NULL; 418 419 error = copyin(SCARG(uap, msg), (caddr_t)&msg, sizeof(msg)); 420 if (error) 421 return (error); 422 if ((unsigned int)msg.msg_iovlen > UIO_SMALLIOV) { 423 if ((unsigned int)msg.msg_iovlen > IOV_MAX) 424 return (EMSGSIZE); 425 iov = malloc(sizeof(struct iovec) * msg.msg_iovlen, 426 M_IOV, M_WAITOK); 427 } else 428 iov = aiov; 429 if ((unsigned int)msg.msg_iovlen > 0) { 430 error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, 431 (size_t)(msg.msg_iovlen * sizeof(struct iovec))); 432 if (error) 433 goto done; 434 } 435 msg.msg_iov = iov; 436 msg.msg_flags = 0; 437 438 /* Convert the sockaddr if necessary */ 439 if (msg.msg_name) { 440 struct sockaddr *sa; 441 sg = stackgap_init(p, 0); 442 443 error = linux_sa_get(p, &sg, &sa, 444 (struct osockaddr *) msg.msg_name, &msg.msg_namelen); 445 if (error) 446 goto done; 447 msg.msg_name = sa; 448 } 449 450 /* 451 * Translate message flags. 452 */ 453 bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); 454 if (bflags < 0) { 455 /* Some supported flag */ 456 error = EINVAL; 457 goto done; 458 } 459 460 /* 461 * Handle cmsg if there is any. 462 */ 463 if (CMSG_FIRSTHDR(&msg)) { 464 struct cmsghdr cmsg, *cc; 465 int changed = 0; 466 ssize_t resid = msg.msg_controllen; 467 size_t clen, cidx = 0, cspace; 468 469 /* 470 * Limit the size even more than what sockargs() would do, 471 * We need to fit into stackgap space. 472 */ 473 if (msg.msg_controllen > (STACKGAPLEN / 2)) { 474 /* Sorry guys! */ 475 error = EMSGSIZE; 476 goto done; 477 } 478 479 control = malloc((clen = msg.msg_controllen), M_TEMP, M_WAITOK); 480 if (!control) { 481 error = ENOMEM; 482 goto done; 483 } 484 485 cc = CMSG_FIRSTHDR(&msg); 486 do { 487 error = copyin(cc, &cmsg, sizeof(cmsg)); 488 if (error) 489 goto done; 490 491 /* 492 * Sanity check the control message length. 493 */ 494 if (cmsg.cmsg_len > resid 495 || cmsg.cmsg_len < sizeof(struct cmsghdr)) { 496 error = EINVAL; 497 goto done; 498 } 499 500 /* 501 * Refuse unsupported control messages, and 502 * translate fields as appropriate. 503 */ 504 switch (cmsg.cmsg_level) { 505 case LINUX_SOL_SOCKET: 506 /* It only differs on some archs */ 507 if (LINUX_SOL_SOCKET != SOL_SOCKET) { 508 cmsg.cmsg_level = SOL_SOCKET; 509 changed = 1; 510 } 511 512 switch(cmsg.cmsg_type) { 513 case LINUX_SCM_RIGHTS: 514 /* Linux SCM_RIGHTS is same as NetBSD */ 515 break; 516 517 default: 518 /* other types not supported */ 519 error = EINVAL; 520 goto done; 521 } 522 break; 523 default: 524 /* pray and leave intact */ 525 break; 526 } 527 528 cspace = CMSG_SPACE(cmsg.cmsg_len - sizeof(cmsg)); 529 530 /* Check the buffer is big enough */ 531 if (__predict_false(cidx + cspace > clen)) { 532 u_int8_t *nc; 533 534 clen = cidx + cspace; 535 nc = realloc(control, clen, M_TEMP, M_WAITOK); 536 if (!nc) { 537 error = ENOMEM; 538 goto done; 539 } 540 control = nc; 541 } 542 543 /* Copy header */ 544 memcpy(&control[cidx], &cmsg, sizeof(cmsg)); 545 546 /* Zero are between header and data */ 547 memset(&control[cidx+sizeof(cmsg)], 0, 548 CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg)); 549 550 /* Copyin the data */ 551 error = copyin(LINUX_CMSG_DATA(cc), 552 CMSG_DATA(control), 553 cmsg.cmsg_len - sizeof(cmsg)); 554 if (error) 555 goto done; 556 557 /* 558 * If there is alignment difference, we changed 559 * layout of cmsg. 560 */ 561 if (LINUX_CMSG_ALIGNDIFF) 562 changed = 1; 563 564 resid -= cspace; 565 cidx += cspace; 566 } while ((cc = LINUX_CMSG_NXTHDR(&msg, cc)) && resid > 0); 567 568 /* 569 * If any of the passed control message needed 570 * a change, put the changed data into stackgap 571 * and adjust msg appropriately. 572 */ 573 if (changed) { 574 char *newc; 575 576 /* 577 * Check again the total len is maximum half of 578 * stackgap. The length might change if the 579 * alignment is different. 580 */ 581 if (clen > STACKGAPLEN/2) { 582 error = EMSGSIZE; 583 goto done; 584 } 585 586 /* 587 * Allocate space on stack within stackgap, and 588 * copy changed data there. 589 */ 590 if (!sg) 591 sg = stackgap_init(p, STACKGAPLEN/3); 592 newc = stackgap_alloc(p, &sg, clen); 593 if (!newc) { 594 error = ENOMEM; 595 goto done; 596 } 597 598 error = copyout(control, newc, clen); 599 if (error) 600 goto done; 601 602 msg.msg_control = newc; 603 msg.msg_controllen = clen; 604 } 605 606 free(control, M_TEMP); 607 control = NULL; 608 } 609 610 error = sendit(p, SCARG(uap, s), &msg, bflags, retval); 611 612 done: 613 if (control) 614 free(control, M_TEMP); 615 if (iov != aiov) 616 free(iov, M_IOV); 617 return (error); 618 } 619 620 int 621 linux_sys_recvfrom(l, v, retval) 622 struct lwp *l; 623 void *v; 624 register_t *retval; 625 { 626 struct linux_sys_recvfrom_args /* { 627 syscallarg(int) s; 628 syscallarg(void *) buf; 629 syscallarg(int) len; 630 syscallarg(int) flags; 631 syscallarg(struct osockaddr *) from; 632 syscallarg(int *) fromlenaddr; 633 } */ *uap = v; 634 int error; 635 struct sys_recvfrom_args bra; 636 637 SCARG(&bra, s) = SCARG(uap, s); 638 SCARG(&bra, buf) = SCARG(uap, buf); 639 SCARG(&bra, len) = SCARG(uap, len); 640 SCARG(&bra, flags) = SCARG(uap, flags); 641 SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); 642 SCARG(&bra, fromlenaddr) = SCARG(uap, fromlenaddr); 643 644 if ((error = sys_recvfrom(l, &bra, retval))) 645 return (error); 646 647 if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) 648 return (error); 649 650 return (0); 651 } 652 653 int 654 linux_sys_recvmsg(l, v, retval) 655 struct lwp *l; 656 void *v; 657 register_t *retval; 658 { 659 struct linux_sys_recvmsg_args /* { 660 syscallarg(int) s; 661 syscallarg(struct msghdr *) msg; 662 syscallarg(u_int) flags; 663 } */ *uap = v; 664 struct msghdr msg; 665 int error; 666 struct sys_recvmsg_args bsa; 667 int lflags; 668 u_int8_t *ocontrol = NULL; /* XXX: gcc */ 669 socklen_t ocontrollen = 0; 670 671 /* 672 * Data alignment is different on some architectures. If control 673 * message is expected, we must arrange for the control message 674 * to be initially put elsewhere, and copy to target place 675 * with Linux alignment. 676 */ 677 if (LINUX_CMSG_ALIGNDIFF) { 678 error = copyin(SCARG(uap, msg), &msg, sizeof(msg)); 679 if (error) 680 return (error); 681 682 if (CMSG_FIRSTHDR(&msg)) { 683 caddr_t sg; 684 685 /* Need to fit within stackgap */ 686 if (msg.msg_controllen > STACKGAPLEN/2) { 687 /* Sorry guys! */ 688 return (EINVAL); 689 } 690 691 sg = stackgap_init(l->l_proc, STACKGAPLEN/3); 692 693 ocontrol = msg.msg_control; 694 ocontrollen = msg.msg_controllen; 695 696 /* space for at least one message's worth align */ 697 msg.msg_controllen += CMSG_ALIGN(1); 698 699 msg.msg_control = stackgap_alloc(l->l_proc, &sg, 700 msg.msg_controllen); 701 if (!msg.msg_control) 702 return (ENOMEM); 703 704 /* 705 * Okay to overwrite the original structure, it's 706 * supposed to be writable. 707 */ 708 error = copyout(&msg, SCARG(uap, msg), sizeof(msg)); 709 if (error) 710 return (error); 711 } 712 } 713 714 SCARG(&bsa, s) = SCARG(uap, s); 715 SCARG(&bsa, msg) = SCARG(uap, msg); 716 SCARG(&bsa, flags) = linux_to_bsd_msg_flags(SCARG(uap, flags)); 717 718 if (SCARG(&bsa, flags) < 0) { 719 /* Some unsupported flag */ 720 return (EINVAL); 721 } 722 723 if ((error = sys_recvmsg(l, &bsa, retval))) 724 goto done; 725 726 /* Fixup sockaddr */ 727 error = copyin((caddr_t)SCARG(uap, msg), (caddr_t)&msg, 728 sizeof(msg)); 729 if (error) 730 goto done; 731 732 if (msg.msg_name && msg.msg_namelen > 2) { 733 if ((error = linux_sa_put(msg.msg_name))) 734 goto done; 735 } 736 737 /* Fixup msg flags */ 738 lflags = bsd_to_linux_msg_flags(msg.msg_flags); 739 if (lflags < 0) { 740 /* Some flag unsupported by Linux */ 741 error = EINVAL; 742 goto done; 743 } 744 error = copyout(&lflags, (u_int8_t *) SCARG(uap, msg) + 745 offsetof(struct msghdr, msg_flags), sizeof(lflags)); 746 if (error) 747 goto done; 748 749 /* 750 * Fixup cmsg. We handle two things: 751 * 1. different values for level/type on some archs 752 * 2. different alignment of CMSG_DATA on some archs 753 */ 754 if (CMSG_FIRSTHDR(&msg)) { 755 struct cmsghdr cmsg, *cc; 756 int changed = 0; 757 size_t resid = ocontrollen; 758 759 cc = CMSG_FIRSTHDR(&msg); 760 do { 761 error = copyin(cc, &cmsg, sizeof(cmsg)); 762 if (error) 763 goto done; 764 765 switch (cmsg.cmsg_level) { 766 case SOL_SOCKET: 767 if (SOL_SOCKET != LINUX_SOL_SOCKET) { 768 cmsg.cmsg_level = LINUX_SOL_SOCKET; 769 changed = 1; 770 } 771 772 switch (cmsg.cmsg_type) { 773 case SCM_RIGHTS: 774 /* Linux SCM_RIGHTS is same as NetBSD */ 775 break; 776 777 default: 778 /* other types not supported */ 779 error = EINVAL; 780 goto done; 781 } 782 default: 783 /* pray and leave intact */ 784 break; 785 } 786 787 if (LINUX_CMSG_ALIGNDIFF) { 788 int i; 789 u_int8_t d, *sd, *td; 790 791 /* 792 * Sanity check. 793 */ 794 if (cmsg.cmsg_len > resid 795 || cmsg.cmsg_len < sizeof(cmsg)) { 796 error = EINVAL; 797 goto done; 798 } 799 800 /* 801 * Need to copy the cmsg from scratch area 802 * to the original place, converting data 803 * alignment from NetBSD to Linux one. 804 */ 805 error = copyout(&cmsg, ocontrol, sizeof(cmsg)); 806 if (error) 807 goto done; 808 /* zero pad */ 809 for(i=0; i < LINUX_CMSG_ALIGN(sizeof(cmsg)) - sizeof(cmsg); i++) { 810 copyout("",&ocontrol[sizeof(cmsg)+i],1); 811 } 812 813 sd = CMSG_DATA(cc); 814 td = LINUX_CMSG_DATA(ocontrol); 815 816 /* This is not particularily effective, but ..*/ 817 d = '\0'; 818 for(i=0; i < cmsg.cmsg_len - sizeof(cmsg); i++){ 819 copyin(sd++, &d, 1); 820 copyout(&d, td++, 1); 821 } 822 823 resid -= (td - ocontrol); 824 ocontrol = td; 825 } else if (changed) { 826 /* Update cmsghdr in-place */ 827 error = copyout(&cmsg, cc, sizeof(cmsg)); 828 if (error) 829 goto done; 830 changed = 0; 831 } 832 } while((cc = CMSG_NXTHDR(&msg, cc))); 833 } 834 835 done: 836 return (error); 837 } 838 839 /* 840 * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET 841 * is different, the rest matches IPPROTO_* on both systems. 842 */ 843 int 844 linux_to_bsd_sopt_level(llevel) 845 int llevel; 846 { 847 848 switch (llevel) { 849 case LINUX_SOL_SOCKET: 850 return SOL_SOCKET; 851 case LINUX_SOL_IP: 852 return IPPROTO_IP; 853 case LINUX_SOL_TCP: 854 return IPPROTO_TCP; 855 case LINUX_SOL_UDP: 856 return IPPROTO_UDP; 857 default: 858 return -1; 859 } 860 } 861 862 /* 863 * Convert Linux socket level socket option numbers to NetBSD values. 864 */ 865 int 866 linux_to_bsd_so_sockopt(lopt) 867 int lopt; 868 { 869 870 switch (lopt) { 871 case LINUX_SO_DEBUG: 872 return SO_DEBUG; 873 case LINUX_SO_REUSEADDR: 874 /* 875 * Linux does not implement SO_REUSEPORT, but allows reuse of a 876 * host:port pair through SO_REUSEADDR even if the address is not a 877 * multicast-address. Effectively, this means that we should use 878 * SO_REUSEPORT to allow Linux applications to not exit with 879 * EADDRINUSE 880 */ 881 return SO_REUSEPORT; 882 case LINUX_SO_TYPE: 883 return SO_TYPE; 884 case LINUX_SO_ERROR: 885 return SO_ERROR; 886 case LINUX_SO_DONTROUTE: 887 return SO_DONTROUTE; 888 case LINUX_SO_BROADCAST: 889 return SO_BROADCAST; 890 case LINUX_SO_SNDBUF: 891 return SO_SNDBUF; 892 case LINUX_SO_RCVBUF: 893 return SO_RCVBUF; 894 case LINUX_SO_KEEPALIVE: 895 return SO_KEEPALIVE; 896 case LINUX_SO_OOBINLINE: 897 return SO_OOBINLINE; 898 case LINUX_SO_LINGER: 899 return SO_LINGER; 900 case LINUX_SO_PRIORITY: 901 case LINUX_SO_NO_CHECK: 902 default: 903 return -1; 904 } 905 } 906 907 /* 908 * Convert Linux IP level socket option number to NetBSD values. 909 */ 910 int 911 linux_to_bsd_ip_sockopt(lopt) 912 int lopt; 913 { 914 915 switch (lopt) { 916 case LINUX_IP_TOS: 917 return IP_TOS; 918 case LINUX_IP_TTL: 919 return IP_TTL; 920 case LINUX_IP_MULTICAST_TTL: 921 return IP_MULTICAST_TTL; 922 case LINUX_IP_MULTICAST_LOOP: 923 return IP_MULTICAST_LOOP; 924 case LINUX_IP_MULTICAST_IF: 925 return IP_MULTICAST_IF; 926 case LINUX_IP_ADD_MEMBERSHIP: 927 return IP_ADD_MEMBERSHIP; 928 case LINUX_IP_DROP_MEMBERSHIP: 929 return IP_DROP_MEMBERSHIP; 930 default: 931 return -1; 932 } 933 } 934 935 /* 936 * Convert Linux TCP level socket option number to NetBSD values. 937 */ 938 int 939 linux_to_bsd_tcp_sockopt(lopt) 940 int lopt; 941 { 942 943 switch (lopt) { 944 case LINUX_TCP_NODELAY: 945 return TCP_NODELAY; 946 case LINUX_TCP_MAXSEG: 947 return TCP_MAXSEG; 948 default: 949 return -1; 950 } 951 } 952 953 /* 954 * Convert Linux UDP level socket option number to NetBSD values. 955 */ 956 int 957 linux_to_bsd_udp_sockopt(lopt) 958 int lopt; 959 { 960 961 switch (lopt) { 962 default: 963 return -1; 964 } 965 } 966 967 /* 968 * Another reasonably straightforward function: setsockopt(2). 969 * The level and option numbers are converted; the values passed 970 * are not (yet) converted, the ones currently implemented don't 971 * need conversion, as they are the same on both systems. 972 */ 973 int 974 linux_sys_setsockopt(l, v, retval) 975 struct lwp *l; 976 void *v; 977 register_t *retval; 978 { 979 struct linux_sys_setsockopt_args /* { 980 syscallarg(int) s; 981 syscallarg(int) level; 982 syscallarg(int) optname; 983 syscallarg(void *) optval; 984 syscallarg(int) optlen; 985 } */ *uap = v; 986 struct sys_setsockopt_args bsa; 987 int name; 988 989 SCARG(&bsa, s) = SCARG(uap, s); 990 SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 991 SCARG(&bsa, val) = SCARG(uap, optval); 992 SCARG(&bsa, valsize) = SCARG(uap, optlen); 993 994 switch (SCARG(&bsa, level)) { 995 case SOL_SOCKET: 996 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 997 break; 998 case IPPROTO_IP: 999 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1000 break; 1001 case IPPROTO_TCP: 1002 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1003 break; 1004 case IPPROTO_UDP: 1005 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1006 break; 1007 default: 1008 return EINVAL; 1009 } 1010 1011 if (name == -1) 1012 return EINVAL; 1013 SCARG(&bsa, name) = name; 1014 1015 return sys_setsockopt(l, &bsa, retval); 1016 } 1017 1018 /* 1019 * getsockopt(2) is very much the same as setsockopt(2) (see above) 1020 */ 1021 int 1022 linux_sys_getsockopt(l, v, retval) 1023 struct lwp *l; 1024 void *v; 1025 register_t *retval; 1026 { 1027 struct linux_sys_getsockopt_args /* { 1028 syscallarg(int) s; 1029 syscallarg(int) level; 1030 syscallarg(int) optname; 1031 syscallarg(void *) optval; 1032 syscallarg(int *) optlen; 1033 } */ *uap = v; 1034 struct sys_getsockopt_args bga; 1035 int name; 1036 1037 SCARG(&bga, s) = SCARG(uap, s); 1038 SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); 1039 SCARG(&bga, val) = SCARG(uap, optval); 1040 SCARG(&bga, avalsize) = SCARG(uap, optlen); 1041 1042 switch (SCARG(&bga, level)) { 1043 case SOL_SOCKET: 1044 name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); 1045 break; 1046 case IPPROTO_IP: 1047 name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); 1048 break; 1049 case IPPROTO_TCP: 1050 name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); 1051 break; 1052 case IPPROTO_UDP: 1053 name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); 1054 break; 1055 default: 1056 return EINVAL; 1057 } 1058 1059 if (name == -1) 1060 return EINVAL; 1061 SCARG(&bga, name) = name; 1062 1063 return sys_getsockopt(l, &bga, retval); 1064 } 1065 1066 #define IF_NAME_LEN 16 1067 1068 int 1069 linux_getifhwaddr(p, retval, fd, data) 1070 struct proc *p; 1071 register_t *retval; 1072 u_int fd; 1073 void *data; 1074 { 1075 /* Not the full structure, just enough to map what we do here */ 1076 struct linux_ifreq { 1077 char if_name[IF_NAME_LEN]; 1078 struct osockaddr hwaddr; 1079 } lreq; 1080 struct filedesc *fdp; 1081 struct file *fp; 1082 struct ifaddr *ifa; 1083 struct ifnet *ifp; 1084 struct sockaddr_dl *sadl; 1085 int error, found; 1086 int index, ifnum; 1087 1088 /* 1089 * We can't emulate this ioctl by calling sys_ioctl() to run 1090 * SIOCGIFCONF, because the user buffer is not of the right 1091 * type to take those results. We can't use kernel buffers to 1092 * receive the results, as the implementation of sys_ioctl() 1093 * and ifconf() [which implements SIOCGIFCONF] use 1094 * copyin()/copyout() which will fail on kernel addresses. 1095 * 1096 * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. 1097 */ 1098 1099 fdp = p->p_fd; 1100 if ((fp = fd_getfile(fdp, fd)) == NULL) 1101 return (EBADF); 1102 1103 FILE_USE(fp); 1104 if ((fp->f_flag & (FREAD | FWRITE)) == 0) { 1105 error = EBADF; 1106 goto out; 1107 } 1108 1109 error = copyin(data, (caddr_t)&lreq, sizeof(lreq)); 1110 if (error) 1111 goto out; 1112 lreq.if_name[IF_NAME_LEN-1] = '\0'; /* just in case */ 1113 1114 /* 1115 * Try real interface name first, then fake "ethX" 1116 */ 1117 for (ifp = ifnet.tqh_first, found = 0; 1118 ifp != 0 && !found; 1119 ifp = ifp->if_list.tqe_next) { 1120 if (strcmp(lreq.if_name, ifp->if_xname)) 1121 /* not this interface */ 1122 continue; 1123 found=1; 1124 if ((ifa = ifp->if_addrlist.tqh_first) != 0) { 1125 for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 1126 sadl = (struct sockaddr_dl *)ifa->ifa_addr; 1127 /* only return ethernet addresses */ 1128 /* XXX what about FDDI, etc. ? */ 1129 if (sadl->sdl_family != AF_LINK || 1130 sadl->sdl_type != IFT_ETHER) 1131 continue; 1132 memcpy((caddr_t)&lreq.hwaddr.sa_data, 1133 LLADDR(sadl), 1134 MIN(sadl->sdl_alen, 1135 sizeof(lreq.hwaddr.sa_data))); 1136 lreq.hwaddr.sa_family = 1137 sadl->sdl_family; 1138 error = copyout((caddr_t)&lreq, data, 1139 sizeof(lreq)); 1140 goto out; 1141 } 1142 } else { 1143 error = ENODEV; 1144 goto out; 1145 } 1146 } 1147 1148 if (strncmp(lreq.if_name, "eth", 3) == 0) { 1149 for (ifnum = 0, index = 3; 1150 lreq.if_name[index] != '\0' && index < IF_NAME_LEN; 1151 index++) { 1152 ifnum *= 10; 1153 ifnum += lreq.if_name[index] - '0'; 1154 } 1155 1156 error = EINVAL; /* in case we don't find one */ 1157 for (ifp = ifnet.tqh_first, found = 0; 1158 ifp != 0 && !found; 1159 ifp = ifp->if_list.tqe_next) { 1160 memcpy(lreq.if_name, ifp->if_xname, 1161 MIN(IF_NAME_LEN, IFNAMSIZ)); 1162 if ((ifa = ifp->if_addrlist.tqh_first) == 0) 1163 /* no addresses on this interface */ 1164 continue; 1165 else 1166 for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 1167 sadl = (struct sockaddr_dl *)ifa->ifa_addr; 1168 /* only return ethernet addresses */ 1169 /* XXX what about FDDI, etc. ? */ 1170 if (sadl->sdl_family != AF_LINK || 1171 sadl->sdl_type != IFT_ETHER) 1172 continue; 1173 if (ifnum--) 1174 /* not the reqested iface */ 1175 continue; 1176 memcpy((caddr_t)&lreq.hwaddr.sa_data, 1177 LLADDR(sadl), 1178 MIN(sadl->sdl_alen, 1179 sizeof(lreq.hwaddr.sa_data))); 1180 lreq.hwaddr.sa_family = 1181 sadl->sdl_family; 1182 error = copyout((caddr_t)&lreq, data, 1183 sizeof(lreq)); 1184 found = 1; 1185 break; 1186 } 1187 } 1188 } else { 1189 /* unknown interface, not even an "eth*" name */ 1190 error = ENODEV; 1191 } 1192 1193 out: 1194 FILE_UNUSE(fp, p); 1195 return error; 1196 } 1197 #undef IF_NAME_LEN 1198 1199 int 1200 linux_ioctl_socket(p, uap, retval) 1201 struct proc *p; 1202 struct linux_sys_ioctl_args /* { 1203 syscallarg(int) fd; 1204 syscallarg(u_long) com; 1205 syscallarg(caddr_t) data; 1206 } */ *uap; 1207 register_t *retval; 1208 { 1209 u_long com; 1210 int error = 0, isdev = 0, dosys = 1; 1211 struct sys_ioctl_args ia; 1212 struct file *fp; 1213 struct filedesc *fdp; 1214 struct vnode *vp; 1215 int (*ioctlf)(struct file *, u_long, void *, struct proc *); 1216 struct ioctl_pt pt; 1217 1218 fdp = p->p_fd; 1219 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1220 return (EBADF); 1221 1222 FILE_USE(fp); 1223 1224 if (fp->f_type == DTYPE_VNODE) { 1225 vp = (struct vnode *)fp->f_data; 1226 isdev = vp->v_type == VCHR; 1227 } 1228 1229 /* 1230 * Don't try to interpret socket ioctl calls that are done 1231 * on a device filedescriptor, just pass them through, to 1232 * emulate Linux behaviour. Use PTIOCLINUX so that the 1233 * device will only handle these if it's prepared to do 1234 * so, to avoid unexpected things from happening. 1235 */ 1236 if (isdev) { 1237 dosys = 0; 1238 ioctlf = fp->f_ops->fo_ioctl; 1239 pt.com = SCARG(uap, com); 1240 pt.data = SCARG(uap, data); 1241 error = ioctlf(fp, PTIOCLINUX, (caddr_t)&pt, p); 1242 /* 1243 * XXX hack: if the function returns EJUSTRETURN, 1244 * it has stuffed a sysctl return value in pt.data. 1245 */ 1246 if (error == EJUSTRETURN) { 1247 retval[0] = (register_t)pt.data; 1248 error = 0; 1249 } 1250 goto out; 1251 } 1252 1253 com = SCARG(uap, com); 1254 retval[0] = 0; 1255 1256 switch (com) { 1257 case LINUX_SIOCGIFCONF: 1258 SCARG(&ia, com) = OSIOCGIFCONF; 1259 break; 1260 case LINUX_SIOCGIFFLAGS: 1261 SCARG(&ia, com) = SIOCGIFFLAGS; 1262 break; 1263 case LINUX_SIOCSIFFLAGS: 1264 SCARG(&ia, com) = SIOCSIFFLAGS; 1265 break; 1266 case LINUX_SIOCGIFADDR: 1267 SCARG(&ia, com) = OSIOCGIFADDR; 1268 break; 1269 case LINUX_SIOCGIFDSTADDR: 1270 SCARG(&ia, com) = OSIOCGIFDSTADDR; 1271 break; 1272 case LINUX_SIOCGIFBRDADDR: 1273 SCARG(&ia, com) = OSIOCGIFBRDADDR; 1274 break; 1275 case LINUX_SIOCGIFNETMASK: 1276 SCARG(&ia, com) = OSIOCGIFNETMASK; 1277 break; 1278 case LINUX_SIOCADDMULTI: 1279 SCARG(&ia, com) = SIOCADDMULTI; 1280 break; 1281 case LINUX_SIOCDELMULTI: 1282 SCARG(&ia, com) = SIOCDELMULTI; 1283 break; 1284 case LINUX_SIOCGIFHWADDR: 1285 error = linux_getifhwaddr(p, retval, SCARG(uap, fd), 1286 SCARG(uap, data)); 1287 dosys = 0; 1288 break; 1289 default: 1290 error = EINVAL; 1291 } 1292 1293 out: 1294 FILE_UNUSE(fp, p); 1295 1296 if (error ==0 && dosys) { 1297 SCARG(&ia, fd) = SCARG(uap, fd); 1298 SCARG(&ia, data) = SCARG(uap, data); 1299 /* XXX NJWLWP */ 1300 error = sys_ioctl(curlwp, &ia, retval); 1301 } 1302 1303 return error; 1304 } 1305 1306 int 1307 linux_sys_connect(l, v, retval) 1308 struct lwp *l; 1309 void *v; 1310 register_t *retval; 1311 { 1312 struct linux_sys_connect_args /* { 1313 syscallarg(int) s; 1314 syscallarg(const struct sockaddr *) name; 1315 syscallarg(int) namelen; 1316 } */ *uap = v; 1317 struct proc *p = l->l_proc; 1318 int error; 1319 struct sockaddr *sa; 1320 struct sys_connect_args bca; 1321 caddr_t sg = stackgap_init(p, 0); 1322 int namlen; 1323 1324 namlen = SCARG(uap, namelen); 1325 error = linux_sa_get(p, &sg, &sa, SCARG(uap, name), &namlen); 1326 if (error) 1327 return (error); 1328 1329 SCARG(&bca, s) = SCARG(uap, s); 1330 SCARG(&bca, name) = sa; 1331 SCARG(&bca, namelen) = (unsigned int) namlen; 1332 1333 error = sys_connect(l, &bca, retval); 1334 1335 if (error == EISCONN) { 1336 struct file *fp; 1337 struct socket *so; 1338 int s, state, prflags; 1339 1340 /* getsock() will use the descriptor for us */ 1341 if (getsock(p->p_fd, SCARG(uap, s), &fp) != 0) 1342 return EISCONN; 1343 1344 s = splsoftnet(); 1345 so = (struct socket *)fp->f_data; 1346 state = so->so_state; 1347 prflags = so->so_proto->pr_flags; 1348 splx(s); 1349 FILE_UNUSE(fp, p); 1350 /* 1351 * We should only let this call succeed once per 1352 * non-blocking connect; however we don't have 1353 * a convenient place to keep that state.. 1354 */ 1355 if ((state & SS_NBIO) && (state & SS_ISCONNECTED) && 1356 (prflags & PR_CONNREQUIRED)) 1357 return 0; 1358 } 1359 1360 return (error); 1361 } 1362 1363 int 1364 linux_sys_bind(l, v, retval) 1365 struct lwp *l; 1366 void *v; 1367 register_t *retval; 1368 { 1369 struct linux_sys_bind_args /* { 1370 syscallarg(int) s; 1371 syscallarg(const struct osockaddr *) name; 1372 syscallarg(int) namelen; 1373 } */ *uap = v; 1374 struct proc *p = l->l_proc; 1375 int error, namlen; 1376 struct sys_bind_args bsa; 1377 1378 namlen = SCARG(uap, namelen); 1379 SCARG(&bsa, s) = SCARG(uap, s); 1380 if (SCARG(uap, name)) { 1381 struct sockaddr *sa; 1382 caddr_t sg = stackgap_init(p, 0); 1383 1384 error = linux_sa_get(p, &sg, &sa, SCARG(uap, name), &namlen); 1385 if (error) 1386 return (error); 1387 1388 SCARG(&bsa, name) = sa; 1389 } else 1390 SCARG(&bsa, name) = NULL; 1391 SCARG(&bsa, namelen) = namlen; 1392 1393 return (sys_bind(l, &bsa, retval)); 1394 } 1395 1396 int 1397 linux_sys_getsockname(l, v, retval) 1398 struct lwp *l; 1399 void *v; 1400 register_t *retval; 1401 { 1402 struct linux_sys_getsockname_args /* { 1403 syscallarg(int) fdes; 1404 syscallarg(caddr_t) asa; 1405 syscallarg(int *) alen; 1406 } */ *uap = v; 1407 int error; 1408 1409 if ((error = sys_getsockname(l, uap, retval)) != 0) 1410 return (error); 1411 1412 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1413 return (error); 1414 1415 return (0); 1416 } 1417 1418 int 1419 linux_sys_getpeername(l, v, retval) 1420 struct lwp *l; 1421 void *v; 1422 register_t *retval; 1423 { 1424 struct sys_getpeername_args /* { 1425 syscallarg(int) fdes; 1426 syscallarg(caddr_t) asa; 1427 syscallarg(int *) alen; 1428 } */ *uap = v; 1429 int error; 1430 1431 if ((error = sys_getpeername(l, uap, retval)) != 0) 1432 return (error); 1433 1434 if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) 1435 return (error); 1436 1437 return (0); 1438 } 1439 1440 /* 1441 * Copy the osockaddr structure pointed to by osa to kernel, adjust 1442 * family and convert to sockaddr, allocate stackgap and put the 1443 * the converted structure there, address on stackgap returned in sap. 1444 */ 1445 static int 1446 linux_sa_get(p, sgp, sap, osa, osalen) 1447 struct proc *p; 1448 caddr_t *sgp; 1449 struct sockaddr **sap; 1450 const struct osockaddr *osa; 1451 int *osalen; 1452 { 1453 int error=0, bdom; 1454 struct sockaddr *sa, *usa; 1455 struct osockaddr *kosa = (struct osockaddr *) &sa; 1456 int alloclen; 1457 #ifdef INET6 1458 int oldv6size; 1459 struct sockaddr_in6 *sin6; 1460 #endif 1461 1462 if (*osalen < 2 || *osalen > UCHAR_MAX || !osa) { 1463 DPRINTF(("bad osa=%p osalen=%d\n", osa, *osalen)); 1464 return (EINVAL); 1465 } 1466 1467 alloclen = *osalen; 1468 #ifdef INET6 1469 oldv6size = 0; 1470 /* 1471 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it 1472 * if it's a v4-mapped address, so reserve the proper space 1473 * for it. 1474 */ 1475 if (alloclen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 1476 alloclen = sizeof (struct sockaddr_in6); 1477 oldv6size = 1; 1478 } 1479 #endif 1480 1481 kosa = (struct osockaddr *) malloc(alloclen, M_TEMP, M_WAITOK); 1482 1483 if ((error = copyin(osa, (caddr_t) kosa, *osalen))) { 1484 DPRINTF(("error copying osa %d\n", error)); 1485 goto out; 1486 } 1487 1488 bdom = linux_to_bsd_domain(kosa->sa_family); 1489 if (bdom == -1) { 1490 DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 1491 error = EINVAL; 1492 goto out; 1493 } 1494 1495 #ifdef INET6 1496 /* 1497 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 1498 * which lacks the scope id compared with RFC2553 one. If we detect 1499 * the situation, reject the address and write a message to system log. 1500 * 1501 * Still accept addresses for which the scope id is not used. 1502 */ 1503 if (oldv6size && bdom == AF_INET6) { 1504 sin6 = (struct sockaddr_in6 *)kosa; 1505 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 1506 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 1507 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 1508 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && 1509 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1510 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 1511 sin6->sin6_scope_id = 0; 1512 } else { 1513 struct proc *p = curproc; /* XXX */ 1514 int uid = p->p_cred && p->p_ucred ? 1515 p->p_ucred->cr_uid : -1; 1516 1517 log(LOG_DEBUG, 1518 "pid %d (%s), uid %d: obsolete pre-RFC2553 " 1519 "sockaddr_in6 rejected", 1520 p->p_pid, p->p_comm, uid); 1521 error = EINVAL; 1522 goto out; 1523 } 1524 } else 1525 #endif 1526 if (bdom == AF_INET) { 1527 alloclen = sizeof(struct sockaddr_in); 1528 } 1529 1530 sa = (struct sockaddr *) kosa; 1531 sa->sa_family = bdom; 1532 sa->sa_len = alloclen; 1533 #ifdef DEBUG_LINUX 1534 DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); 1535 for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) 1536 DPRINTF(("%02x ", sa->sa_data[bdom])); 1537 DPRINTF(("\n")); 1538 #endif 1539 1540 usa = (struct sockaddr *) stackgap_alloc(p, sgp, alloclen); 1541 if (!usa) { 1542 error = ENOMEM; 1543 goto out; 1544 } 1545 1546 if ((error = copyout(sa, usa, alloclen))) { 1547 DPRINTF(("error copying out socket %d\n", error)); 1548 goto out; 1549 } 1550 1551 *sap = usa; 1552 1553 out: 1554 *osalen = alloclen; 1555 free(kosa, M_TEMP); 1556 return (error); 1557 } 1558 1559 static int 1560 linux_sa_put(osa) 1561 struct osockaddr *osa; 1562 { 1563 struct sockaddr sa; 1564 struct osockaddr *kosa; 1565 int error, bdom, len; 1566 1567 /* 1568 * Only read/write the sockaddr family and length part, the rest is 1569 * not changed. 1570 */ 1571 len = sizeof(sa.sa_len) + sizeof(sa.sa_family); 1572 1573 error = copyin((caddr_t) osa, (caddr_t) &sa, len); 1574 if (error) 1575 return (error); 1576 1577 bdom = bsd_to_linux_domain(sa.sa_family); 1578 if (bdom == -1) 1579 return (EINVAL); 1580 1581 /* Note: we convert from sockaddr to osockaddr here, too */ 1582 kosa = (struct osockaddr *) &sa; 1583 kosa->sa_family = bdom; 1584 error = copyout(kosa, osa, len); 1585 if (error) 1586 return (error); 1587 1588 return (0); 1589 } 1590 1591 int 1592 linux_sys_recv(l, v, retval) 1593 struct lwp *l; 1594 void *v; 1595 register_t *retval; 1596 { 1597 struct linux_sys_recv_args /* { 1598 syscallarg(int) s; 1599 syscallarg(void *) buf; 1600 syscallarg(int) len; 1601 syscallarg(int) flags; 1602 } */ *uap = v; 1603 struct sys_recvfrom_args bra; 1604 1605 1606 SCARG(&bra, s) = SCARG(uap, s); 1607 SCARG(&bra, buf) = SCARG(uap, buf); 1608 SCARG(&bra, len) = (size_t) SCARG(uap, len); 1609 SCARG(&bra, flags) = SCARG(uap, flags); 1610 SCARG(&bra, from) = NULL; 1611 SCARG(&bra, fromlenaddr) = NULL; 1612 1613 return (sys_recvfrom(l, &bra, retval)); 1614 } 1615 1616 int 1617 linux_sys_send(l, v, retval) 1618 struct lwp *l; 1619 void *v; 1620 register_t *retval; 1621 { 1622 struct linux_sys_send_args /* { 1623 syscallarg(int) s; 1624 syscallarg(caddr_t) buf; 1625 syscallarg(int) len; 1626 syscallarg(int) flags; 1627 } */ *uap = v; 1628 struct sys_sendto_args bsa; 1629 1630 SCARG(&bsa, s) = SCARG(uap, s); 1631 SCARG(&bsa, buf) = SCARG(uap, buf); 1632 SCARG(&bsa, len) = SCARG(uap, len); 1633 SCARG(&bsa, flags) = SCARG(uap, flags); 1634 SCARG(&bsa, to) = NULL; 1635 SCARG(&bsa, tolen) = 0; 1636 1637 return (sys_sendto(l, &bsa, retval)); 1638 } 1639 1640 int 1641 linux_sys_accept(l, v, retval) 1642 struct lwp *l; 1643 void *v; 1644 register_t *retval; 1645 { 1646 struct linux_sys_accept_args /* { 1647 syscallarg(int) s; 1648 syscallarg(struct osockaddr *) name; 1649 syscallarg(int *) anamelen; 1650 } */ *uap = v; 1651 int error; 1652 struct sys_accept_args baa; 1653 1654 SCARG(&baa, s) = SCARG(uap, s); 1655 SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); 1656 SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); 1657 1658 if ((error = sys_accept(l, &baa, retval))) 1659 return (error); 1660 1661 if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) 1662 return (error); 1663 1664 return (0); 1665 } 1666