linux_socket.c revision 162585
1/*- 2 * Copyright (c) 1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/compat/linux/linux_socket.c 162585 2006-09-23 19:06:54Z netchild $"); 31 32/* XXX we use functions that might not exist. */ 33#include "opt_compat.h" 34#include "opt_inet6.h" 35 36#include <sys/param.h> 37#include <sys/proc.h> 38#include <sys/systm.h> 39#include <sys/sysproto.h> 40#include <sys/fcntl.h> 41#include <sys/file.h> 42#include <sys/limits.h> 43#include <sys/lock.h> 44#include <sys/malloc.h> 45#include <sys/mutex.h> 46#include <sys/mbuf.h> 47#include <sys/socket.h> 48#include <sys/socketvar.h> 49#include <sys/syscallsubr.h> 50#include <sys/uio.h> 51#include <sys/syslog.h> 52 53#include <netinet/in.h> 54#include <netinet/in_systm.h> 55#include <netinet/ip.h> 56#ifdef INET6 57#include <netinet/ip6.h> 58#include <netinet6/ip6_var.h> 59#endif 60 61#ifdef COMPAT_LINUX32 62#include <machine/../linux32/linux.h> 63#include <machine/../linux32/linux32_proto.h> 64#else 65#include <machine/../linux/linux.h> 66#include <machine/../linux/linux_proto.h> 67#endif 68#include <compat/linux/linux_socket.h> 69#include <compat/linux/linux_util.h> 70 71static int do_sa_get(struct sockaddr **, const struct osockaddr *, int *, 72 struct malloc_type *); 73static int linux_to_bsd_domain(int); 74 75/* 76 * Reads a linux sockaddr and does any necessary translation. 77 * Linux sockaddrs don't have a length field, only a family. 78 */ 79static int 80linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int len) 81{ 82 int osalen = len; 83 84 return (do_sa_get(sap, osa, &osalen, M_SONAME)); 85} 86 87/* 88 * Copy the osockaddr structure pointed to by osa to kernel, adjust 89 * family and convert to sockaddr. 90 */ 91static int 92do_sa_get(struct sockaddr **sap, const struct osockaddr *osa, int *osalen, 93 struct malloc_type *mtype) 94{ 95 int error=0, bdom; 96 struct sockaddr *sa; 97 struct osockaddr *kosa; 98 int alloclen; 99#ifdef INET6 100 int oldv6size; 101 struct sockaddr_in6 *sin6; 102#endif 103 104 if (*osalen < 2 || *osalen > UCHAR_MAX || !osa) 105 return (EINVAL); 106 107 alloclen = *osalen; 108#ifdef INET6 109 oldv6size = 0; 110 /* 111 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it 112 * if it's a v4-mapped address, so reserve the proper space 113 * for it. 114 */ 115 if (alloclen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 116 alloclen = sizeof (struct sockaddr_in6); 117 oldv6size = 1; 118 } 119#endif 120 121 MALLOC(kosa, struct osockaddr *, alloclen, mtype, M_WAITOK); 122 123 if ((error = copyin(osa, kosa, *osalen))) 124 goto out; 125 126 bdom = linux_to_bsd_domain(kosa->sa_family); 127 if (bdom == -1) { 128 error = EINVAL; 129 goto out; 130 } 131 132#ifdef INET6 133 /* 134 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 135 * which lacks the scope id compared with RFC2553 one. If we detect 136 * the situation, reject the address and write a message to system log. 137 * 138 * Still accept addresses for which the scope id is not used. 139 */ 140 if (oldv6size && bdom == AF_INET6) { 141 sin6 = (struct sockaddr_in6 *)kosa; 142 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 143 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 144 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 145 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && 146 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 147 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 148 sin6->sin6_scope_id = 0; 149 } else { 150 log(LOG_DEBUG, 151 "obsolete pre-RFC2553 sockaddr_in6 rejected\n"); 152 error = EINVAL; 153 goto out; 154 } 155 } else 156#endif 157 if (bdom == AF_INET) 158 alloclen = sizeof(struct sockaddr_in); 159 160 sa = (struct sockaddr *) kosa; 161 sa->sa_family = bdom; 162 sa->sa_len = alloclen; 163 164 *sap = sa; 165 *osalen = alloclen; 166 return (0); 167 168out: 169 FREE(kosa, mtype); 170 return (error); 171} 172 173static int 174linux_to_bsd_domain(int domain) 175{ 176 177 switch (domain) { 178 case LINUX_AF_UNSPEC: 179 return (AF_UNSPEC); 180 case LINUX_AF_UNIX: 181 return (AF_LOCAL); 182 case LINUX_AF_INET: 183 return (AF_INET); 184 case LINUX_AF_INET6: 185 return (AF_INET6); 186 case LINUX_AF_AX25: 187 return (AF_CCITT); 188 case LINUX_AF_IPX: 189 return (AF_IPX); 190 case LINUX_AF_APPLETALK: 191 return (AF_APPLETALK); 192 } 193 return (-1); 194} 195 196static int 197bsd_to_linux_domain(int domain) 198{ 199 200 switch (domain) { 201 case AF_UNSPEC: 202 return (LINUX_AF_UNSPEC); 203 case AF_LOCAL: 204 return (LINUX_AF_UNIX); 205 case AF_INET: 206 return (LINUX_AF_INET); 207 case AF_INET6: 208 return (LINUX_AF_INET6); 209 case AF_CCITT: 210 return (LINUX_AF_AX25); 211 case AF_IPX: 212 return (LINUX_AF_IPX); 213 case AF_APPLETALK: 214 return (LINUX_AF_APPLETALK); 215 } 216 return (-1); 217} 218 219static int 220linux_to_bsd_sockopt_level(int level) 221{ 222 223 switch (level) { 224 case LINUX_SOL_SOCKET: 225 return (SOL_SOCKET); 226 } 227 return (level); 228} 229 230static int 231bsd_to_linux_sockopt_level(int level) 232{ 233 234 switch (level) { 235 case SOL_SOCKET: 236 return (LINUX_SOL_SOCKET); 237 } 238 return (level); 239} 240 241static int 242linux_to_bsd_ip_sockopt(int opt) 243{ 244 245 switch (opt) { 246 case LINUX_IP_TOS: 247 return (IP_TOS); 248 case LINUX_IP_TTL: 249 return (IP_TTL); 250 case LINUX_IP_OPTIONS: 251 return (IP_OPTIONS); 252 case LINUX_IP_MULTICAST_IF: 253 return (IP_MULTICAST_IF); 254 case LINUX_IP_MULTICAST_TTL: 255 return (IP_MULTICAST_TTL); 256 case LINUX_IP_MULTICAST_LOOP: 257 return (IP_MULTICAST_LOOP); 258 case LINUX_IP_ADD_MEMBERSHIP: 259 return (IP_ADD_MEMBERSHIP); 260 case LINUX_IP_DROP_MEMBERSHIP: 261 return (IP_DROP_MEMBERSHIP); 262 case LINUX_IP_HDRINCL: 263 return (IP_HDRINCL); 264 } 265 return (-1); 266} 267 268static int 269linux_to_bsd_so_sockopt(int opt) 270{ 271 272 switch (opt) { 273 case LINUX_SO_DEBUG: 274 return (SO_DEBUG); 275 case LINUX_SO_REUSEADDR: 276 return (SO_REUSEADDR); 277 case LINUX_SO_TYPE: 278 return (SO_TYPE); 279 case LINUX_SO_ERROR: 280 return (SO_ERROR); 281 case LINUX_SO_DONTROUTE: 282 return (SO_DONTROUTE); 283 case LINUX_SO_BROADCAST: 284 return (SO_BROADCAST); 285 case LINUX_SO_SNDBUF: 286 return (SO_SNDBUF); 287 case LINUX_SO_RCVBUF: 288 return (SO_RCVBUF); 289 case LINUX_SO_KEEPALIVE: 290 return (SO_KEEPALIVE); 291 case LINUX_SO_OOBINLINE: 292 return (SO_OOBINLINE); 293 case LINUX_SO_LINGER: 294 return (SO_LINGER); 295 } 296 return (-1); 297} 298 299static int 300linux_to_bsd_msg_flags(int flags) 301{ 302 int ret_flags = 0; 303 304 if (flags & LINUX_MSG_OOB) 305 ret_flags |= MSG_OOB; 306 if (flags & LINUX_MSG_PEEK) 307 ret_flags |= MSG_PEEK; 308 if (flags & LINUX_MSG_DONTROUTE) 309 ret_flags |= MSG_DONTROUTE; 310 if (flags & LINUX_MSG_CTRUNC) 311 ret_flags |= MSG_CTRUNC; 312 if (flags & LINUX_MSG_TRUNC) 313 ret_flags |= MSG_TRUNC; 314 if (flags & LINUX_MSG_DONTWAIT) 315 ret_flags |= MSG_DONTWAIT; 316 if (flags & LINUX_MSG_EOR) 317 ret_flags |= MSG_EOR; 318 if (flags & LINUX_MSG_WAITALL) 319 ret_flags |= MSG_WAITALL; 320 if (flags & LINUX_MSG_NOSIGNAL) 321 ret_flags |= MSG_NOSIGNAL; 322#if 0 /* not handled */ 323 if (flags & LINUX_MSG_PROXY) 324 ; 325 if (flags & LINUX_MSG_FIN) 326 ; 327 if (flags & LINUX_MSG_SYN) 328 ; 329 if (flags & LINUX_MSG_CONFIRM) 330 ; 331 if (flags & LINUX_MSG_RST) 332 ; 333 if (flags & LINUX_MSG_ERRQUEUE) 334 ; 335#endif 336 return ret_flags; 337} 338 339/* 340* If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the 341* native syscall will fault. Thus, we don't really need to check the 342* return values for these functions. 343*/ 344 345static int 346bsd_to_linux_sockaddr(struct sockaddr *arg) 347{ 348 struct sockaddr sa; 349 size_t sa_len = sizeof(struct sockaddr); 350 int error; 351 352 if ((error = copyin(arg, &sa, sa_len))) 353 return (error); 354 355 *(u_short *)&sa = sa.sa_family; 356 357 error = copyout(&sa, arg, sa_len); 358 359 return (error); 360} 361 362static int 363linux_to_bsd_sockaddr(struct sockaddr *arg, int len) 364{ 365 struct sockaddr sa; 366 size_t sa_len = sizeof(struct sockaddr); 367 int error; 368 369 if ((error = copyin(arg, &sa, sa_len))) 370 return (error); 371 372 sa.sa_family = *(sa_family_t *)&sa; 373 sa.sa_len = len; 374 375 error = copyout(&sa, arg, sa_len); 376 377 return (error); 378} 379 380 381static int 382linux_sa_put(struct osockaddr *osa) 383{ 384 struct osockaddr sa; 385 int error, bdom; 386 387 /* 388 * Only read/write the osockaddr family part, the rest is 389 * not changed. 390 */ 391 error = copyin(osa, &sa, sizeof(sa.sa_family)); 392 if (error) 393 return (error); 394 395 bdom = bsd_to_linux_domain(sa.sa_family); 396 if (bdom == -1) 397 return (EINVAL); 398 399 sa.sa_family = bdom; 400 error = copyout(&sa, osa, sizeof(sa.sa_family)); 401 if (error) 402 return (error); 403 404 return (0); 405} 406 407static int 408linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 409 enum uio_seg segflg) 410{ 411 struct mbuf *control; 412 struct sockaddr *to; 413 int error; 414 415 if (mp->msg_name != NULL) { 416 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); 417 if (error) 418 return (error); 419 mp->msg_name = to; 420 } else 421 to = NULL; 422 423 if (mp->msg_control != NULL) { 424 struct cmsghdr *cmsg; 425 426 if (mp->msg_controllen < sizeof(struct cmsghdr)) { 427 error = EINVAL; 428 goto bad; 429 } 430 error = sockargs(&control, mp->msg_control, 431 mp->msg_controllen, MT_CONTROL); 432 if (error) 433 goto bad; 434 435 cmsg = mtod(control, struct cmsghdr *); 436 cmsg->cmsg_level = linux_to_bsd_sockopt_level(cmsg->cmsg_level); 437 } else 438 control = NULL; 439 440 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 441 segflg); 442 443bad: 444 if (to) 445 FREE(to, M_SONAME); 446 return (error); 447} 448 449/* Return 0 if IP_HDRINCL is set for the given socket. */ 450static int 451linux_check_hdrincl(struct thread *td, int s) 452{ 453 int error, optval, size_val; 454 455 size_val = sizeof(optval); 456 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 457 &optval, UIO_SYSSPACE, &size_val); 458 if (error) 459 return (error); 460 461 return (optval == 0); 462} 463 464struct linux_sendto_args { 465 int s; 466 l_uintptr_t msg; 467 int len; 468 int flags; 469 l_uintptr_t to; 470 int tolen; 471}; 472 473/* 474 * Updated sendto() when IP_HDRINCL is set: 475 * tweak endian-dependent fields in the IP packet. 476 */ 477static int 478linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 479{ 480/* 481 * linux_ip_copysize defines how many bytes we should copy 482 * from the beginning of the IP packet before we customize it for BSD. 483 * It should include all the fields we modify (ip_len and ip_off). 484 */ 485#define linux_ip_copysize 8 486 487 struct ip *packet; 488 struct msghdr msg; 489 struct iovec aiov[1]; 490 int error; 491 492 /* Check that the packet isn't too big or too small. */ 493 if (linux_args->len < linux_ip_copysize || 494 linux_args->len > IP_MAXPACKET) 495 return (EINVAL); 496 497 packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK); 498 499 /* Make kernel copy of the packet to be sent */ 500 if ((error = copyin(PTRIN(linux_args->msg), packet, 501 linux_args->len))) 502 goto goout; 503 504 /* Convert fields from Linux to BSD raw IP socket format */ 505 packet->ip_len = linux_args->len; 506 packet->ip_off = ntohs(packet->ip_off); 507 508 /* Prepare the msghdr and iovec structures describing the new packet */ 509 msg.msg_name = PTRIN(linux_args->to); 510 msg.msg_namelen = linux_args->tolen; 511 msg.msg_iov = aiov; 512 msg.msg_iovlen = 1; 513 msg.msg_control = NULL; 514 msg.msg_flags = 0; 515 aiov[0].iov_base = (char *)packet; 516 aiov[0].iov_len = linux_args->len; 517 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 518 UIO_SYSSPACE); 519goout: 520 free(packet, M_TEMP); 521 return (error); 522} 523 524struct linux_socket_args { 525 int domain; 526 int type; 527 int protocol; 528}; 529 530static int 531linux_socket(struct thread *td, struct linux_socket_args *args) 532{ 533 struct linux_socket_args linux_args; 534 struct socket_args /* { 535 int domain; 536 int type; 537 int protocol; 538 } */ bsd_args; 539 int error; 540 int retval_socket; 541 542 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 543 return (error); 544 545 bsd_args.protocol = linux_args.protocol; 546 bsd_args.type = linux_args.type; 547 bsd_args.domain = linux_to_bsd_domain(linux_args.domain); 548 if (bsd_args.domain == -1) 549 return (EINVAL); 550 551 retval_socket = socket(td, &bsd_args); 552 if (bsd_args.type == SOCK_RAW 553 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) 554 && bsd_args.domain == AF_INET 555 && retval_socket >= 0) { 556 /* It's a raw IP socket: set the IP_HDRINCL option. */ 557 int hdrincl; 558 559 hdrincl = 1; 560 /* We ignore any error returned by kern_setsockopt() */ 561 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 562 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 563 } 564#ifdef INET6 565 /* 566 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by 567 * default and some apps depend on this. So, set V6ONLY to 0 568 * for Linux apps if the sysctl value is set to 1. 569 */ 570 if (bsd_args.domain == PF_INET6 && retval_socket >= 0 571#ifndef KLD_MODULE 572 /* 573 * XXX: Avoid undefined symbol error with an IPv4 only 574 * kernel. 575 */ 576 && ip6_v6only 577#endif 578 ) { 579 int v6only; 580 581 v6only = 0; 582 /* We ignore any error returned by setsockopt() */ 583 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 584 &v6only, UIO_SYSSPACE, sizeof(v6only)); 585 } 586#endif 587 588 return (retval_socket); 589} 590 591struct linux_bind_args { 592 int s; 593 l_uintptr_t name; 594 int namelen; 595}; 596 597static int 598linux_bind(struct thread *td, struct linux_bind_args *args) 599{ 600 struct linux_bind_args linux_args; 601 struct sockaddr *sa; 602 int error; 603 604 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 605 return (error); 606 607 error = linux_getsockaddr(&sa, PTRIN(linux_args.name), 608 linux_args.namelen); 609 if (error) 610 return (error); 611 612 error = kern_bind(td, linux_args.s, sa); 613 free(sa, M_SONAME); 614 if (error == EADDRNOTAVAIL && linux_args.namelen != sizeof(struct sockaddr_in)) 615 return (EINVAL); 616 return (error); 617} 618 619struct linux_connect_args { 620 int s; 621 l_uintptr_t name; 622 int namelen; 623}; 624int linux_connect(struct thread *, struct linux_connect_args *); 625 626int 627linux_connect(struct thread *td, struct linux_connect_args *args) 628{ 629 struct linux_connect_args linux_args; 630 struct socket *so; 631 struct sockaddr *sa; 632 u_int fflag; 633 int error; 634 635 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 636 return (error); 637 638 error = linux_getsockaddr(&sa, 639 (struct osockaddr *)PTRIN(linux_args.name), 640 linux_args.namelen); 641 if (error) 642 return (error); 643 644 error = kern_connect(td, linux_args.s, sa); 645 free(sa, M_SONAME); 646 if (error != EISCONN) 647 return (error); 648 649 /* 650 * Linux doesn't return EISCONN the first time it occurs, 651 * when on a non-blocking socket. Instead it returns the 652 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 653 * 654 * XXXRW: Instead of using fgetsock(), check that it is a 655 * socket and use the file descriptor reference instead of 656 * creating a new one. 657 */ 658 NET_LOCK_GIANT(); 659 error = fgetsock(td, linux_args.s, &so, &fflag); 660 if (error == 0) { 661 error = EISCONN; 662 if (fflag & FNONBLOCK) { 663 SOCK_LOCK(so); 664 if (so->so_emuldata == 0) 665 error = so->so_error; 666 so->so_emuldata = (void *)1; 667 SOCK_UNLOCK(so); 668 } 669 fputsock(so); 670 } 671 NET_UNLOCK_GIANT(); 672 return (error); 673} 674 675struct linux_listen_args { 676 int s; 677 int backlog; 678}; 679 680static int 681linux_listen(struct thread *td, struct linux_listen_args *args) 682{ 683 struct linux_listen_args linux_args; 684 struct listen_args /* { 685 int s; 686 int backlog; 687 } */ bsd_args; 688 int error; 689 690 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 691 return (error); 692 693 bsd_args.s = linux_args.s; 694 bsd_args.backlog = linux_args.backlog; 695 return (listen(td, &bsd_args)); 696} 697 698struct linux_accept_args { 699 int s; 700 l_uintptr_t addr; 701 l_uintptr_t namelen; 702}; 703 704static int 705linux_accept(struct thread *td, struct linux_accept_args *args) 706{ 707 struct linux_accept_args linux_args; 708 struct accept_args /* { 709 int s; 710 struct sockaddr * __restrict name; 711 socklen_t * __restrict anamelen; 712 } */ bsd_args; 713 int error, fd; 714 715 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 716 return (error); 717 718 bsd_args.s = linux_args.s; 719 /* XXX: */ 720 bsd_args.name = (struct sockaddr * __restrict)PTRIN(linux_args.addr); 721 bsd_args.anamelen = PTRIN(linux_args.namelen);/* XXX */ 722 error = accept(td, &bsd_args); 723 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); 724 if (error) { 725 if (error == EFAULT && linux_args.namelen != sizeof(struct sockaddr_in)) 726 return (EINVAL); 727 return (error); 728 } 729 if (linux_args.addr) { 730 error = linux_sa_put(PTRIN(linux_args.addr)); 731 if (error) { 732 (void)kern_close(td, td->td_retval[0]); 733 return (error); 734 } 735 } 736 737 /* 738 * linux appears not to copy flags from the parent socket to the 739 * accepted one, so we must clear the flags in the new descriptor. 740 * Ignore any errors, because we already have an open fd. 741 */ 742 fd = td->td_retval[0]; 743 (void)kern_fcntl(td, fd, F_SETFL, 0); 744 td->td_retval[0] = fd; 745 return (0); 746} 747 748struct linux_getsockname_args { 749 int s; 750 l_uintptr_t addr; 751 l_uintptr_t namelen; 752}; 753 754static int 755linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 756{ 757 struct linux_getsockname_args linux_args; 758 struct getsockname_args /* { 759 int fdes; 760 struct sockaddr * __restrict asa; 761 socklen_t * __restrict alen; 762 } */ bsd_args; 763 int error; 764 765 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 766 return (error); 767 768 bsd_args.fdes = linux_args.s; 769 /* XXX: */ 770 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(linux_args.addr); 771 bsd_args.alen = PTRIN(linux_args.namelen); /* XXX */ 772 error = getsockname(td, &bsd_args); 773 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 774 if (error) 775 return (error); 776 error = linux_sa_put(PTRIN(linux_args.addr)); 777 if (error) 778 return (error); 779 return (0); 780} 781 782struct linux_getpeername_args { 783 int s; 784 l_uintptr_t addr; 785 l_uintptr_t namelen; 786}; 787 788static int 789linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 790{ 791 struct linux_getpeername_args linux_args; 792 struct getpeername_args /* { 793 int fdes; 794 caddr_t asa; 795 int *alen; 796 } */ bsd_args; 797 int error; 798 799 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 800 return (error); 801 802 bsd_args.fdes = linux_args.s; 803 bsd_args.asa = (struct sockaddr *)PTRIN(linux_args.addr); 804 bsd_args.alen = (int *)PTRIN(linux_args.namelen); 805 error = getpeername(td, &bsd_args); 806 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 807 if (error) 808 return (error); 809 error = linux_sa_put(PTRIN(linux_args.addr)); 810 if (error) 811 return (error); 812 return (0); 813} 814 815struct linux_socketpair_args { 816 int domain; 817 int type; 818 int protocol; 819 l_uintptr_t rsv; 820}; 821 822static int 823linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 824{ 825 struct linux_socketpair_args linux_args; 826 struct socketpair_args /* { 827 int domain; 828 int type; 829 int protocol; 830 int *rsv; 831 } */ bsd_args; 832 int error; 833 834 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 835 return (error); 836 837 bsd_args.domain = linux_to_bsd_domain(linux_args.domain); 838 if (bsd_args.domain == -1) 839 return (EINVAL); 840 841 bsd_args.type = linux_args.type; 842 bsd_args.protocol = linux_args.protocol; 843 bsd_args.rsv = (int *)PTRIN(linux_args.rsv); 844 return (socketpair(td, &bsd_args)); 845} 846 847struct linux_send_args { 848 int s; 849 l_uintptr_t msg; 850 int len; 851 int flags; 852}; 853 854static int 855linux_send(struct thread *td, struct linux_send_args *args) 856{ 857 struct linux_send_args linux_args; 858 struct sendto_args /* { 859 int s; 860 caddr_t buf; 861 int len; 862 int flags; 863 caddr_t to; 864 int tolen; 865 } */ bsd_args; 866 int error; 867 868 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 869 return (error); 870 871 bsd_args.s = linux_args.s; 872 bsd_args.buf = (caddr_t)PTRIN(linux_args.msg); 873 bsd_args.len = linux_args.len; 874 bsd_args.flags = linux_args.flags; 875 bsd_args.to = NULL; 876 bsd_args.tolen = 0; 877 return sendto(td, &bsd_args); 878} 879 880struct linux_recv_args { 881 int s; 882 l_uintptr_t msg; 883 int len; 884 int flags; 885}; 886 887static int 888linux_recv(struct thread *td, struct linux_recv_args *args) 889{ 890 struct linux_recv_args linux_args; 891 struct recvfrom_args /* { 892 int s; 893 caddr_t buf; 894 int len; 895 int flags; 896 struct sockaddr *from; 897 socklen_t fromlenaddr; 898 } */ bsd_args; 899 int error; 900 901 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 902 return (error); 903 904 bsd_args.s = linux_args.s; 905 bsd_args.buf = (caddr_t)PTRIN(linux_args.msg); 906 bsd_args.len = linux_args.len; 907 bsd_args.flags = linux_args.flags; 908 bsd_args.from = NULL; 909 bsd_args.fromlenaddr = 0; 910 return (recvfrom(td, &bsd_args)); 911} 912 913static int 914linux_sendto(struct thread *td, struct linux_sendto_args *args) 915{ 916 struct linux_sendto_args linux_args; 917 struct msghdr msg; 918 struct iovec aiov; 919 int error; 920 921 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 922 return (error); 923 924 if (linux_check_hdrincl(td, linux_args.s) == 0) 925 /* IP_HDRINCL set, tweak the packet before sending */ 926 return (linux_sendto_hdrincl(td, &linux_args)); 927 928 msg.msg_name = PTRIN(linux_args.to); 929 msg.msg_namelen = linux_args.tolen; 930 msg.msg_iov = &aiov; 931 msg.msg_iovlen = 1; 932 msg.msg_control = NULL; 933 msg.msg_flags = 0; 934 aiov.iov_base = PTRIN(linux_args.msg); 935 aiov.iov_len = linux_args.len; 936 error = linux_sendit(td, linux_args.s, &msg, linux_args.flags, 937 UIO_USERSPACE); 938 return (error); 939} 940 941struct linux_recvfrom_args { 942 int s; 943 l_uintptr_t buf; 944 int len; 945 int flags; 946 l_uintptr_t from; 947 l_uintptr_t fromlen; 948}; 949 950static int 951linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 952{ 953 struct linux_recvfrom_args linux_args; 954 struct recvfrom_args /* { 955 int s; 956 caddr_t buf; 957 size_t len; 958 int flags; 959 struct sockaddr * __restrict from; 960 socklen_t * __restrict fromlenaddr; 961 } */ bsd_args; 962 size_t len; 963 int error; 964 965 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 966 return (error); 967 968 if ((error = copyin(PTRIN(linux_args.fromlen), &len, sizeof(size_t)))) 969 return (error); 970 971 bsd_args.s = linux_args.s; 972 bsd_args.buf = PTRIN(linux_args.buf); 973 bsd_args.len = linux_args.len; 974 bsd_args.flags = linux_to_bsd_msg_flags(linux_args.flags); 975 /* XXX: */ 976 bsd_args.from = (struct sockaddr * __restrict)PTRIN(linux_args.from); 977 bsd_args.fromlenaddr = PTRIN(linux_args.fromlen);/* XXX */ 978 979 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len); 980 error = recvfrom(td, &bsd_args); 981 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from); 982 983 if (error) 984 return (error); 985 if (linux_args.from) { 986 error = linux_sa_put((struct osockaddr *) 987 PTRIN(linux_args.from)); 988 if (error) 989 return (error); 990 } 991 return (0); 992} 993 994struct linux_sendmsg_args { 995 int s; 996 l_uintptr_t msg; 997 int flags; 998}; 999 1000static int 1001linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1002{ 1003 struct linux_sendmsg_args linux_args; 1004 struct msghdr msg; 1005 struct iovec *iov; 1006 int error; 1007 1008 /* XXXTJR sendmsg is broken on amd64 */ 1009 1010 error = copyin(args, &linux_args, sizeof(linux_args)); 1011 if (error) 1012 return (error); 1013 error = copyin(PTRIN(linux_args.msg), &msg, sizeof(msg)); 1014 if (error) 1015 return (error); 1016 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1017 if (error) 1018 return (error); 1019 msg.msg_iov = iov; 1020 msg.msg_flags = 0; 1021 error = linux_sendit(td, linux_args.s, &msg, linux_args.flags, 1022 UIO_USERSPACE); 1023 free(iov, M_IOV); 1024 return (error); 1025} 1026 1027struct linux_recvmsg_args { 1028 int s; 1029 l_uintptr_t msg; 1030 int flags; 1031}; 1032 1033static int 1034linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1035{ 1036 struct linux_recvmsg_args linux_args; 1037 struct recvmsg_args /* { 1038 int s; 1039 struct msghdr *msg; 1040 int flags; 1041 } */ bsd_args; 1042 struct msghdr msg; 1043 struct cmsghdr *cmsg; 1044 int error; 1045 1046 /* XXXTJR recvmsg is broken on amd64 */ 1047 1048 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 1049 return (error); 1050 1051 bsd_args.s = linux_args.s; 1052 bsd_args.msg = PTRIN(linux_args.msg); 1053 bsd_args.flags = linux_to_bsd_msg_flags(linux_args.flags); 1054 if (msg.msg_name) { 1055 linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name, 1056 msg.msg_namelen); 1057 error = recvmsg(td, &bsd_args); 1058 bsd_to_linux_sockaddr((struct sockaddr *)msg.msg_name); 1059 } else 1060 error = recvmsg(td, &bsd_args); 1061 if (error) 1062 return (error); 1063 1064 if (bsd_args.msg->msg_control != NULL && 1065 bsd_args.msg->msg_controllen > 0) { 1066 cmsg = (struct cmsghdr*)bsd_args.msg->msg_control; 1067 cmsg->cmsg_level = bsd_to_linux_sockopt_level(cmsg->cmsg_level); 1068 } 1069 1070 error = copyin(PTRIN(linux_args.msg), &msg, sizeof(msg)); 1071 if (error) 1072 return (error); 1073 if (msg.msg_name && msg.msg_namelen > 2) 1074 error = linux_sa_put(msg.msg_name); 1075 return (error); 1076} 1077 1078struct linux_shutdown_args { 1079 int s; 1080 int how; 1081}; 1082 1083static int 1084linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1085{ 1086 struct linux_shutdown_args linux_args; 1087 struct shutdown_args /* { 1088 int s; 1089 int how; 1090 } */ bsd_args; 1091 int error; 1092 1093 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 1094 return (error); 1095 1096 bsd_args.s = linux_args.s; 1097 bsd_args.how = linux_args.how; 1098 return (shutdown(td, &bsd_args)); 1099} 1100 1101struct linux_setsockopt_args { 1102 int s; 1103 int level; 1104 int optname; 1105 l_uintptr_t optval; 1106 int optlen; 1107}; 1108 1109static int 1110linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1111{ 1112 struct linux_setsockopt_args linux_args; 1113 struct setsockopt_args /* { 1114 int s; 1115 int level; 1116 int name; 1117 caddr_t val; 1118 int valsize; 1119 } */ bsd_args; 1120 int error, name; 1121 1122 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 1123 return (error); 1124 1125 bsd_args.s = linux_args.s; 1126 bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level); 1127 switch (bsd_args.level) { 1128 case SOL_SOCKET: 1129 name = linux_to_bsd_so_sockopt(linux_args.optname); 1130 break; 1131 case IPPROTO_IP: 1132 name = linux_to_bsd_ip_sockopt(linux_args.optname); 1133 break; 1134 case IPPROTO_TCP: 1135 /* Linux TCP option values match BSD's */ 1136 name = linux_args.optname; 1137 break; 1138 default: 1139 name = -1; 1140 break; 1141 } 1142 if (name == -1) 1143 return (ENOPROTOOPT); 1144 1145 bsd_args.name = name; 1146 bsd_args.val = PTRIN(linux_args.optval); 1147 bsd_args.valsize = linux_args.optlen; 1148 1149 if (name == IPV6_NEXTHOP) { 1150 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1151 bsd_args.valsize); 1152 error = setsockopt(td, &bsd_args); 1153 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1154 } else 1155 error = setsockopt(td, &bsd_args); 1156 1157 return (error); 1158} 1159 1160struct linux_getsockopt_args { 1161 int s; 1162 int level; 1163 int optname; 1164 l_uintptr_t optval; 1165 l_uintptr_t optlen; 1166}; 1167 1168static int 1169linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1170{ 1171 struct linux_getsockopt_args linux_args; 1172 struct getsockopt_args /* { 1173 int s; 1174 int level; 1175 int name; 1176 caddr_t val; 1177 int *avalsize; 1178 } */ bsd_args; 1179 int error, name; 1180 1181 if ((error = copyin(args, &linux_args, sizeof(linux_args)))) 1182 return (error); 1183 1184 bsd_args.s = linux_args.s; 1185 bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level); 1186 switch (bsd_args.level) { 1187 case SOL_SOCKET: 1188 name = linux_to_bsd_so_sockopt(linux_args.optname); 1189 break; 1190 case IPPROTO_IP: 1191 name = linux_to_bsd_ip_sockopt(linux_args.optname); 1192 break; 1193 case IPPROTO_TCP: 1194 /* Linux TCP option values match BSD's */ 1195 name = linux_args.optname; 1196 break; 1197 default: 1198 name = -1; 1199 break; 1200 } 1201 if (name == -1) 1202 return (EINVAL); 1203 1204 bsd_args.name = name; 1205 bsd_args.val = PTRIN(linux_args.optval); 1206 bsd_args.avalsize = PTRIN(linux_args.optlen); 1207 1208 if (name == IPV6_NEXTHOP) { 1209 error = getsockopt(td, &bsd_args); 1210 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1211 } else 1212 error = getsockopt(td, &bsd_args); 1213 1214 return (error); 1215} 1216 1217int 1218linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1219{ 1220 void *arg = (void *)(intptr_t)args->args; 1221 1222 switch (args->what) { 1223 case LINUX_SOCKET: 1224 return (linux_socket(td, arg)); 1225 case LINUX_BIND: 1226 return (linux_bind(td, arg)); 1227 case LINUX_CONNECT: 1228 return (linux_connect(td, arg)); 1229 case LINUX_LISTEN: 1230 return (linux_listen(td, arg)); 1231 case LINUX_ACCEPT: 1232 return (linux_accept(td, arg)); 1233 case LINUX_GETSOCKNAME: 1234 return (linux_getsockname(td, arg)); 1235 case LINUX_GETPEERNAME: 1236 return (linux_getpeername(td, arg)); 1237 case LINUX_SOCKETPAIR: 1238 return (linux_socketpair(td, arg)); 1239 case LINUX_SEND: 1240 return (linux_send(td, arg)); 1241 case LINUX_RECV: 1242 return (linux_recv(td, arg)); 1243 case LINUX_SENDTO: 1244 return (linux_sendto(td, arg)); 1245 case LINUX_RECVFROM: 1246 return (linux_recvfrom(td, arg)); 1247 case LINUX_SHUTDOWN: 1248 return (linux_shutdown(td, arg)); 1249 case LINUX_SETSOCKOPT: 1250 return (linux_setsockopt(td, arg)); 1251 case LINUX_GETSOCKOPT: 1252 return (linux_getsockopt(td, arg)); 1253 case LINUX_SENDMSG: 1254 return (linux_sendmsg(td, arg)); 1255 case LINUX_RECVMSG: 1256 return (linux_recvmsg(td, arg)); 1257 } 1258 1259 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1260 return (ENOSYS); 1261} 1262