linux_socket.c revision 283490
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 283490 2015-05-24 18:06:12Z dchagin $"); 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/capsicum.h> 41#include <sys/fcntl.h> 42#include <sys/file.h> 43#include <sys/limits.h> 44#include <sys/lock.h> 45#include <sys/malloc.h> 46#include <sys/mutex.h> 47#include <sys/mbuf.h> 48#include <sys/socket.h> 49#include <sys/socketvar.h> 50#include <sys/syscallsubr.h> 51#include <sys/uio.h> 52#include <sys/syslog.h> 53#include <sys/un.h> 54 55#include <net/if.h> 56#include <net/vnet.h> 57#include <netinet/in.h> 58#include <netinet/in_systm.h> 59#include <netinet/ip.h> 60#include <netinet/tcp.h> 61#ifdef INET6 62#include <netinet/ip6.h> 63#include <netinet6/ip6_var.h> 64#endif 65 66#ifdef COMPAT_LINUX32 67#include <machine/../linux32/linux.h> 68#include <machine/../linux32/linux32_proto.h> 69#else 70#include <machine/../linux/linux.h> 71#include <machine/../linux/linux_proto.h> 72#endif 73#include <compat/linux/linux_file.h> 74#include <compat/linux/linux_socket.h> 75#include <compat/linux/linux_timer.h> 76#include <compat/linux/linux_util.h> 77 78static int linux_to_bsd_domain(int); 79static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *, 80 l_uint); 81static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *, 82 l_uint, struct msghdr *); 83static int linux_set_socket_flags(int, int *); 84 85/* 86 * Reads a linux sockaddr and does any necessary translation. 87 * Linux sockaddrs don't have a length field, only a family. 88 * Copy the osockaddr structure pointed to by osa to kernel, adjust 89 * family and convert to sockaddr. 90 */ 91static int 92linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen) 93{ 94 struct sockaddr *sa; 95 struct osockaddr *kosa; 96#ifdef INET6 97 struct sockaddr_in6 *sin6; 98 int oldv6size; 99#endif 100 char *name; 101 int bdom, error, hdrlen, namelen; 102 103 if (salen < 2 || salen > UCHAR_MAX || !osa) 104 return (EINVAL); 105 106#ifdef INET6 107 oldv6size = 0; 108 /* 109 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it 110 * if it's a v4-mapped address, so reserve the proper space 111 * for it. 112 */ 113 if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { 114 salen += sizeof(uint32_t); 115 oldv6size = 1; 116 } 117#endif 118 119 kosa = malloc(salen, M_SONAME, M_WAITOK); 120 121 if ((error = copyin(osa, kosa, salen))) 122 goto out; 123 124 bdom = linux_to_bsd_domain(kosa->sa_family); 125 if (bdom == -1) { 126 error = EAFNOSUPPORT; 127 goto out; 128 } 129 130#ifdef INET6 131 /* 132 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 133 * which lacks the scope id compared with RFC2553 one. If we detect 134 * the situation, reject the address and write a message to system log. 135 * 136 * Still accept addresses for which the scope id is not used. 137 */ 138 if (oldv6size) { 139 if (bdom == AF_INET6) { 140 sin6 = (struct sockaddr_in6 *)kosa; 141 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 142 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 143 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 144 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && 145 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 146 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 147 sin6->sin6_scope_id = 0; 148 } else { 149 log(LOG_DEBUG, 150 "obsolete pre-RFC2553 sockaddr_in6 rejected\n"); 151 error = EINVAL; 152 goto out; 153 } 154 } else 155 salen -= sizeof(uint32_t); 156 } 157#endif 158 if (bdom == AF_INET) { 159 if (salen < sizeof(struct sockaddr_in)) { 160 error = EINVAL; 161 goto out; 162 } 163 salen = sizeof(struct sockaddr_in); 164 } 165 166 if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) { 167 hdrlen = offsetof(struct sockaddr_un, sun_path); 168 name = ((struct sockaddr_un *)kosa)->sun_path; 169 if (*name == '\0') { 170 /* 171 * Linux abstract namespace starts with a NULL byte. 172 * XXX We do not support abstract namespace yet. 173 */ 174 namelen = strnlen(name + 1, salen - hdrlen - 1) + 1; 175 } else 176 namelen = strnlen(name, salen - hdrlen); 177 salen = hdrlen + namelen; 178 if (salen > sizeof(struct sockaddr_un)) { 179 error = ENAMETOOLONG; 180 goto out; 181 } 182 } 183 184 sa = (struct sockaddr *)kosa; 185 sa->sa_family = bdom; 186 sa->sa_len = salen; 187 188 *sap = sa; 189 return (0); 190 191out: 192 free(kosa, M_SONAME); 193 return (error); 194} 195 196static int 197linux_to_bsd_domain(int domain) 198{ 199 200 switch (domain) { 201 case LINUX_AF_UNSPEC: 202 return (AF_UNSPEC); 203 case LINUX_AF_UNIX: 204 return (AF_LOCAL); 205 case LINUX_AF_INET: 206 return (AF_INET); 207 case LINUX_AF_INET6: 208 return (AF_INET6); 209 case LINUX_AF_AX25: 210 return (AF_CCITT); 211 case LINUX_AF_IPX: 212 return (AF_IPX); 213 case LINUX_AF_APPLETALK: 214 return (AF_APPLETALK); 215 } 216 return (-1); 217} 218 219static int 220bsd_to_linux_domain(int domain) 221{ 222 223 switch (domain) { 224 case AF_UNSPEC: 225 return (LINUX_AF_UNSPEC); 226 case AF_LOCAL: 227 return (LINUX_AF_UNIX); 228 case AF_INET: 229 return (LINUX_AF_INET); 230 case AF_INET6: 231 return (LINUX_AF_INET6); 232 case AF_CCITT: 233 return (LINUX_AF_AX25); 234 case AF_IPX: 235 return (LINUX_AF_IPX); 236 case AF_APPLETALK: 237 return (LINUX_AF_APPLETALK); 238 } 239 return (-1); 240} 241 242static int 243linux_to_bsd_sockopt_level(int level) 244{ 245 246 switch (level) { 247 case LINUX_SOL_SOCKET: 248 return (SOL_SOCKET); 249 } 250 return (level); 251} 252 253static int 254bsd_to_linux_sockopt_level(int level) 255{ 256 257 switch (level) { 258 case SOL_SOCKET: 259 return (LINUX_SOL_SOCKET); 260 } 261 return (level); 262} 263 264static int 265linux_to_bsd_ip_sockopt(int opt) 266{ 267 268 switch (opt) { 269 case LINUX_IP_TOS: 270 return (IP_TOS); 271 case LINUX_IP_TTL: 272 return (IP_TTL); 273 case LINUX_IP_OPTIONS: 274 return (IP_OPTIONS); 275 case LINUX_IP_MULTICAST_IF: 276 return (IP_MULTICAST_IF); 277 case LINUX_IP_MULTICAST_TTL: 278 return (IP_MULTICAST_TTL); 279 case LINUX_IP_MULTICAST_LOOP: 280 return (IP_MULTICAST_LOOP); 281 case LINUX_IP_ADD_MEMBERSHIP: 282 return (IP_ADD_MEMBERSHIP); 283 case LINUX_IP_DROP_MEMBERSHIP: 284 return (IP_DROP_MEMBERSHIP); 285 case LINUX_IP_HDRINCL: 286 return (IP_HDRINCL); 287 } 288 return (-1); 289} 290 291static int 292linux_to_bsd_so_sockopt(int opt) 293{ 294 295 switch (opt) { 296 case LINUX_SO_DEBUG: 297 return (SO_DEBUG); 298 case LINUX_SO_REUSEADDR: 299 return (SO_REUSEADDR); 300 case LINUX_SO_TYPE: 301 return (SO_TYPE); 302 case LINUX_SO_ERROR: 303 return (SO_ERROR); 304 case LINUX_SO_DONTROUTE: 305 return (SO_DONTROUTE); 306 case LINUX_SO_BROADCAST: 307 return (SO_BROADCAST); 308 case LINUX_SO_SNDBUF: 309 return (SO_SNDBUF); 310 case LINUX_SO_RCVBUF: 311 return (SO_RCVBUF); 312 case LINUX_SO_KEEPALIVE: 313 return (SO_KEEPALIVE); 314 case LINUX_SO_OOBINLINE: 315 return (SO_OOBINLINE); 316 case LINUX_SO_LINGER: 317 return (SO_LINGER); 318 case LINUX_SO_PEERCRED: 319 return (LOCAL_PEERCRED); 320 case LINUX_SO_RCVLOWAT: 321 return (SO_RCVLOWAT); 322 case LINUX_SO_SNDLOWAT: 323 return (SO_SNDLOWAT); 324 case LINUX_SO_RCVTIMEO: 325 return (SO_RCVTIMEO); 326 case LINUX_SO_SNDTIMEO: 327 return (SO_SNDTIMEO); 328 case LINUX_SO_TIMESTAMP: 329 return (SO_TIMESTAMP); 330 case LINUX_SO_ACCEPTCONN: 331 return (SO_ACCEPTCONN); 332 } 333 return (-1); 334} 335 336static int 337linux_to_bsd_tcp_sockopt(int opt) 338{ 339 340 switch (opt) { 341 case LINUX_TCP_NODELAY: 342 return (TCP_NODELAY); 343 case LINUX_TCP_MAXSEG: 344 return (TCP_MAXSEG); 345 case LINUX_TCP_KEEPIDLE: 346 return (TCP_KEEPIDLE); 347 case LINUX_TCP_KEEPINTVL: 348 return (TCP_KEEPINTVL); 349 case LINUX_TCP_KEEPCNT: 350 return (TCP_KEEPCNT); 351 case LINUX_TCP_MD5SIG: 352 return (TCP_MD5SIG); 353 } 354 return (-1); 355} 356 357static int 358linux_to_bsd_msg_flags(int flags) 359{ 360 int ret_flags = 0; 361 362 if (flags & LINUX_MSG_OOB) 363 ret_flags |= MSG_OOB; 364 if (flags & LINUX_MSG_PEEK) 365 ret_flags |= MSG_PEEK; 366 if (flags & LINUX_MSG_DONTROUTE) 367 ret_flags |= MSG_DONTROUTE; 368 if (flags & LINUX_MSG_CTRUNC) 369 ret_flags |= MSG_CTRUNC; 370 if (flags & LINUX_MSG_TRUNC) 371 ret_flags |= MSG_TRUNC; 372 if (flags & LINUX_MSG_DONTWAIT) 373 ret_flags |= MSG_DONTWAIT; 374 if (flags & LINUX_MSG_EOR) 375 ret_flags |= MSG_EOR; 376 if (flags & LINUX_MSG_WAITALL) 377 ret_flags |= MSG_WAITALL; 378 if (flags & LINUX_MSG_NOSIGNAL) 379 ret_flags |= MSG_NOSIGNAL; 380#if 0 /* not handled */ 381 if (flags & LINUX_MSG_PROXY) 382 ; 383 if (flags & LINUX_MSG_FIN) 384 ; 385 if (flags & LINUX_MSG_SYN) 386 ; 387 if (flags & LINUX_MSG_CONFIRM) 388 ; 389 if (flags & LINUX_MSG_RST) 390 ; 391 if (flags & LINUX_MSG_ERRQUEUE) 392 ; 393#endif 394 return ret_flags; 395} 396 397/* 398* If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the 399* native syscall will fault. Thus, we don't really need to check the 400* return values for these functions. 401*/ 402 403static int 404bsd_to_linux_sockaddr(struct sockaddr *arg) 405{ 406 struct sockaddr sa; 407 size_t sa_len = sizeof(struct sockaddr); 408 int error; 409 410 if ((error = copyin(arg, &sa, sa_len))) 411 return (error); 412 413 *(u_short *)&sa = sa.sa_family; 414 415 error = copyout(&sa, arg, sa_len); 416 417 return (error); 418} 419 420static int 421linux_to_bsd_sockaddr(struct sockaddr *arg, int len) 422{ 423 struct sockaddr sa; 424 size_t sa_len = sizeof(struct sockaddr); 425 int error; 426 427 if ((error = copyin(arg, &sa, sa_len))) 428 return (error); 429 430 sa.sa_family = *(sa_family_t *)&sa; 431 sa.sa_len = len; 432 433 error = copyout(&sa, arg, sa_len); 434 435 return (error); 436} 437 438static int 439linux_sa_put(struct osockaddr *osa) 440{ 441 struct osockaddr sa; 442 int error, bdom; 443 444 /* 445 * Only read/write the osockaddr family part, the rest is 446 * not changed. 447 */ 448 error = copyin(osa, &sa, sizeof(sa.sa_family)); 449 if (error) 450 return (error); 451 452 bdom = bsd_to_linux_domain(sa.sa_family); 453 if (bdom == -1) 454 return (EINVAL); 455 456 sa.sa_family = bdom; 457 error = copyout(&sa, osa, sizeof(sa.sa_family)); 458 if (error) 459 return (error); 460 461 return (0); 462} 463 464static int 465linux_to_bsd_cmsg_type(int cmsg_type) 466{ 467 468 switch (cmsg_type) { 469 case LINUX_SCM_RIGHTS: 470 return (SCM_RIGHTS); 471 case LINUX_SCM_CREDENTIALS: 472 return (SCM_CREDS); 473 } 474 return (-1); 475} 476 477static int 478bsd_to_linux_cmsg_type(int cmsg_type) 479{ 480 481 switch (cmsg_type) { 482 case SCM_RIGHTS: 483 return (LINUX_SCM_RIGHTS); 484 case SCM_CREDS: 485 return (LINUX_SCM_CREDENTIALS); 486 } 487 return (-1); 488} 489 490static int 491linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 492{ 493 if (lhdr->msg_controllen > INT_MAX) 494 return (ENOBUFS); 495 496 bhdr->msg_name = PTRIN(lhdr->msg_name); 497 bhdr->msg_namelen = lhdr->msg_namelen; 498 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 499 bhdr->msg_iovlen = lhdr->msg_iovlen; 500 bhdr->msg_control = PTRIN(lhdr->msg_control); 501 502 /* 503 * msg_controllen is skipped since BSD and LINUX control messages 504 * are potentially different sizes (e.g. the cred structure used 505 * by SCM_CREDS is different between the two operating system). 506 * 507 * The caller can set it (if necessary) after converting all the 508 * control messages. 509 */ 510 511 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 512 return (0); 513} 514 515static int 516bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 517{ 518 lhdr->msg_name = PTROUT(bhdr->msg_name); 519 lhdr->msg_namelen = bhdr->msg_namelen; 520 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 521 lhdr->msg_iovlen = bhdr->msg_iovlen; 522 lhdr->msg_control = PTROUT(bhdr->msg_control); 523 524 /* 525 * msg_controllen is skipped since BSD and LINUX control messages 526 * are potentially different sizes (e.g. the cred structure used 527 * by SCM_CREDS is different between the two operating system). 528 * 529 * The caller can set it (if necessary) after converting all the 530 * control messages. 531 */ 532 533 /* msg_flags skipped */ 534 return (0); 535} 536 537static int 538linux_set_socket_flags(int lflags, int *flags) 539{ 540 541 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 542 return (EINVAL); 543 if (lflags & LINUX_SOCK_NONBLOCK) 544 *flags |= SOCK_NONBLOCK; 545 if (lflags & LINUX_SOCK_CLOEXEC) 546 *flags |= SOCK_CLOEXEC; 547 return (0); 548} 549 550static int 551linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 552 struct mbuf *control, enum uio_seg segflg) 553{ 554 struct sockaddr *to; 555 int error; 556 557 if (mp->msg_name != NULL) { 558 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); 559 if (error) 560 return (error); 561 mp->msg_name = to; 562 } else 563 to = NULL; 564 565 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 566 segflg); 567 568 if (to) 569 free(to, M_SONAME); 570 return (error); 571} 572 573/* Return 0 if IP_HDRINCL is set for the given socket. */ 574static int 575linux_check_hdrincl(struct thread *td, int s) 576{ 577 int error, optval; 578 socklen_t size_val; 579 580 size_val = sizeof(optval); 581 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 582 &optval, UIO_SYSSPACE, &size_val); 583 if (error) 584 return (error); 585 586 return (optval == 0); 587} 588 589/* 590 * Updated sendto() when IP_HDRINCL is set: 591 * tweak endian-dependent fields in the IP packet. 592 */ 593static int 594linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 595{ 596/* 597 * linux_ip_copysize defines how many bytes we should copy 598 * from the beginning of the IP packet before we customize it for BSD. 599 * It should include all the fields we modify (ip_len and ip_off). 600 */ 601#define linux_ip_copysize 8 602 603 struct ip *packet; 604 struct msghdr msg; 605 struct iovec aiov[1]; 606 int error; 607 608 /* Check that the packet isn't too big or too small. */ 609 if (linux_args->len < linux_ip_copysize || 610 linux_args->len > IP_MAXPACKET) 611 return (EINVAL); 612 613 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK); 614 615 /* Make kernel copy of the packet to be sent */ 616 if ((error = copyin(PTRIN(linux_args->msg), packet, 617 linux_args->len))) 618 goto goout; 619 620 /* Convert fields from Linux to BSD raw IP socket format */ 621 packet->ip_len = linux_args->len; 622 packet->ip_off = ntohs(packet->ip_off); 623 624 /* Prepare the msghdr and iovec structures describing the new packet */ 625 msg.msg_name = PTRIN(linux_args->to); 626 msg.msg_namelen = linux_args->tolen; 627 msg.msg_iov = aiov; 628 msg.msg_iovlen = 1; 629 msg.msg_control = NULL; 630 msg.msg_flags = 0; 631 aiov[0].iov_base = (char *)packet; 632 aiov[0].iov_len = linux_args->len; 633 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 634 NULL, UIO_SYSSPACE); 635goout: 636 free(packet, M_LINUX); 637 return (error); 638} 639 640int 641linux_socket(struct thread *td, struct linux_socket_args *args) 642{ 643 struct socket_args /* { 644 int domain; 645 int type; 646 int protocol; 647 } */ bsd_args; 648 int retval_socket; 649 650 bsd_args.protocol = args->protocol; 651 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 652 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 653 return (EINVAL); 654 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 655 &bsd_args.type); 656 if (retval_socket != 0) 657 return (retval_socket); 658 bsd_args.domain = linux_to_bsd_domain(args->domain); 659 if (bsd_args.domain == -1) 660 return (EAFNOSUPPORT); 661 662 retval_socket = sys_socket(td, &bsd_args); 663 if (retval_socket) 664 return (retval_socket); 665 666 if (bsd_args.type == SOCK_RAW 667 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) 668 && bsd_args.domain == PF_INET) { 669 /* It's a raw IP socket: set the IP_HDRINCL option. */ 670 int hdrincl; 671 672 hdrincl = 1; 673 /* We ignore any error returned by kern_setsockopt() */ 674 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 675 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 676 } 677#ifdef INET6 678 /* 679 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 680 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 681 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 682 * sysctl value. 683 */ 684 if (bsd_args.domain == PF_INET6) { 685 int v6only; 686 687 v6only = 0; 688 /* We ignore any error returned by setsockopt() */ 689 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 690 &v6only, UIO_SYSSPACE, sizeof(v6only)); 691 } 692#endif 693 694 return (retval_socket); 695} 696 697int 698linux_bind(struct thread *td, struct linux_bind_args *args) 699{ 700 struct sockaddr *sa; 701 int error; 702 703 error = linux_getsockaddr(&sa, PTRIN(args->name), 704 args->namelen); 705 if (error) 706 return (error); 707 708 error = kern_bindat(td, AT_FDCWD, args->s, sa); 709 free(sa, M_SONAME); 710 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 711 return (EINVAL); 712 return (error); 713} 714 715int 716linux_connect(struct thread *td, struct linux_connect_args *args) 717{ 718 cap_rights_t rights; 719 struct socket *so; 720 struct sockaddr *sa; 721 u_int fflag; 722 int error; 723 724 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), 725 args->namelen); 726 if (error) 727 return (error); 728 729 error = kern_connectat(td, AT_FDCWD, args->s, sa); 730 free(sa, M_SONAME); 731 if (error != EISCONN) 732 return (error); 733 734 /* 735 * Linux doesn't return EISCONN the first time it occurs, 736 * when on a non-blocking socket. Instead it returns the 737 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 738 * 739 * XXXRW: Instead of using fgetsock(), check that it is a 740 * socket and use the file descriptor reference instead of 741 * creating a new one. 742 */ 743 error = fgetsock(td, args->s, cap_rights_init(&rights, CAP_CONNECT), 744 &so, &fflag); 745 if (error == 0) { 746 error = EISCONN; 747 if (fflag & FNONBLOCK) { 748 SOCK_LOCK(so); 749 if (so->so_emuldata == 0) 750 error = so->so_error; 751 so->so_emuldata = (void *)1; 752 SOCK_UNLOCK(so); 753 } 754 fputsock(so); 755 } 756 return (error); 757} 758 759int 760linux_listen(struct thread *td, struct linux_listen_args *args) 761{ 762 struct listen_args /* { 763 int s; 764 int backlog; 765 } */ bsd_args; 766 767 bsd_args.s = args->s; 768 bsd_args.backlog = args->backlog; 769 return (sys_listen(td, &bsd_args)); 770} 771 772static int 773linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 774 l_uintptr_t namelen, int flags) 775{ 776 struct accept4_args /* { 777 int s; 778 struct sockaddr * __restrict name; 779 socklen_t * __restrict anamelen; 780 int flags; 781 } */ bsd_args; 782 int error; 783 784 bsd_args.s = s; 785 /* XXX: */ 786 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); 787 bsd_args.anamelen = PTRIN(namelen);/* XXX */ 788 error = linux_set_socket_flags(flags, &bsd_args.flags); 789 if (error != 0) 790 return (error); 791 error = sys_accept4(td, &bsd_args); 792 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); 793 if (error) { 794 if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) 795 return (EINVAL); 796 return (error); 797 } 798 if (addr) 799 error = linux_sa_put(PTRIN(addr)); 800 if (error) { 801 (void)kern_close(td, td->td_retval[0]); 802 td->td_retval[0] = 0; 803 } 804 return (error); 805} 806 807int 808linux_accept(struct thread *td, struct linux_accept_args *args) 809{ 810 811 return (linux_accept_common(td, args->s, args->addr, 812 args->namelen, 0)); 813} 814 815int 816linux_accept4(struct thread *td, struct linux_accept4_args *args) 817{ 818 819 return (linux_accept_common(td, args->s, args->addr, 820 args->namelen, args->flags)); 821} 822 823int 824linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 825{ 826 struct getsockname_args /* { 827 int fdes; 828 struct sockaddr * __restrict asa; 829 socklen_t * __restrict alen; 830 } */ bsd_args; 831 int error; 832 833 bsd_args.fdes = args->s; 834 /* XXX: */ 835 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); 836 bsd_args.alen = PTRIN(args->namelen); /* XXX */ 837 error = sys_getsockname(td, &bsd_args); 838 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 839 if (error) 840 return (error); 841 error = linux_sa_put(PTRIN(args->addr)); 842 if (error) 843 return (error); 844 return (0); 845} 846 847int 848linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 849{ 850 struct getpeername_args /* { 851 int fdes; 852 caddr_t asa; 853 int *alen; 854 } */ bsd_args; 855 int error; 856 857 bsd_args.fdes = args->s; 858 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); 859 bsd_args.alen = (socklen_t *)PTRIN(args->namelen); 860 error = sys_getpeername(td, &bsd_args); 861 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 862 if (error) 863 return (error); 864 error = linux_sa_put(PTRIN(args->addr)); 865 if (error) 866 return (error); 867 return (0); 868} 869 870int 871linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 872{ 873 struct socketpair_args /* { 874 int domain; 875 int type; 876 int protocol; 877 int *rsv; 878 } */ bsd_args; 879 int error; 880 881 bsd_args.domain = linux_to_bsd_domain(args->domain); 882 if (bsd_args.domain != PF_LOCAL) 883 return (EAFNOSUPPORT); 884 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 885 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 886 return (EINVAL); 887 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 888 &bsd_args.type); 889 if (error != 0) 890 return (error); 891 if (args->protocol != 0 && args->protocol != PF_UNIX) 892 893 /* 894 * Use of PF_UNIX as protocol argument is not right, 895 * but Linux does it. 896 * Do not map PF_UNIX as its Linux value is identical 897 * to FreeBSD one. 898 */ 899 return (EPROTONOSUPPORT); 900 else 901 bsd_args.protocol = 0; 902 bsd_args.rsv = (int *)PTRIN(args->rsv); 903 return (sys_socketpair(td, &bsd_args)); 904} 905 906#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 907struct linux_send_args { 908 int s; 909 l_uintptr_t msg; 910 int len; 911 int flags; 912}; 913 914static int 915linux_send(struct thread *td, struct linux_send_args *args) 916{ 917 struct sendto_args /* { 918 int s; 919 caddr_t buf; 920 int len; 921 int flags; 922 caddr_t to; 923 int tolen; 924 } */ bsd_args; 925 926 bsd_args.s = args->s; 927 bsd_args.buf = (caddr_t)PTRIN(args->msg); 928 bsd_args.len = args->len; 929 bsd_args.flags = args->flags; 930 bsd_args.to = NULL; 931 bsd_args.tolen = 0; 932 return sys_sendto(td, &bsd_args); 933} 934 935struct linux_recv_args { 936 int s; 937 l_uintptr_t msg; 938 int len; 939 int flags; 940}; 941 942static int 943linux_recv(struct thread *td, struct linux_recv_args *args) 944{ 945 struct recvfrom_args /* { 946 int s; 947 caddr_t buf; 948 int len; 949 int flags; 950 struct sockaddr *from; 951 socklen_t fromlenaddr; 952 } */ bsd_args; 953 954 bsd_args.s = args->s; 955 bsd_args.buf = (caddr_t)PTRIN(args->msg); 956 bsd_args.len = args->len; 957 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 958 bsd_args.from = NULL; 959 bsd_args.fromlenaddr = 0; 960 return (sys_recvfrom(td, &bsd_args)); 961} 962#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 963 964int 965linux_sendto(struct thread *td, struct linux_sendto_args *args) 966{ 967 struct msghdr msg; 968 struct iovec aiov; 969 int error; 970 971 if (linux_check_hdrincl(td, args->s) == 0) 972 /* IP_HDRINCL set, tweak the packet before sending */ 973 return (linux_sendto_hdrincl(td, args)); 974 975 msg.msg_name = PTRIN(args->to); 976 msg.msg_namelen = args->tolen; 977 msg.msg_iov = &aiov; 978 msg.msg_iovlen = 1; 979 msg.msg_control = NULL; 980 msg.msg_flags = 0; 981 aiov.iov_base = PTRIN(args->msg); 982 aiov.iov_len = args->len; 983 error = linux_sendit(td, args->s, &msg, args->flags, NULL, 984 UIO_USERSPACE); 985 return (error); 986} 987 988int 989linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 990{ 991 struct msghdr msg; 992 struct iovec aiov; 993 int error; 994 995 if (PTRIN(args->fromlen) != NULL) { 996 error = copyin(PTRIN(args->fromlen), &msg.msg_namelen, 997 sizeof(msg.msg_namelen)); 998 if (error != 0) 999 return (error); 1000 1001 error = linux_to_bsd_sockaddr((struct sockaddr *)PTRIN(args->from), 1002 msg.msg_namelen); 1003 if (error != 0) 1004 return (error); 1005 } else 1006 msg.msg_namelen = 0; 1007 1008 msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from); 1009 msg.msg_iov = &aiov; 1010 msg.msg_iovlen = 1; 1011 aiov.iov_base = PTRIN(args->buf); 1012 aiov.iov_len = args->len; 1013 msg.msg_control = 0; 1014 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1015 1016 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL); 1017 if (error != 0) 1018 return (error); 1019 1020 if (PTRIN(args->from) != NULL) { 1021 error = bsd_to_linux_sockaddr((struct sockaddr *) 1022 PTRIN(args->from)); 1023 if (error != 0) 1024 return (error); 1025 1026 error = linux_sa_put((struct osockaddr *) 1027 PTRIN(args->from)); 1028 } 1029 1030 if (PTRIN(args->fromlen) != NULL) 1031 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1032 sizeof(msg.msg_namelen)); 1033 1034 return (error); 1035} 1036 1037static int 1038linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1039 l_uint flags) 1040{ 1041 struct cmsghdr *cmsg; 1042 struct cmsgcred cmcred; 1043 struct mbuf *control; 1044 struct msghdr msg; 1045 struct l_cmsghdr linux_cmsg; 1046 struct l_cmsghdr *ptr_cmsg; 1047 struct l_msghdr linux_msg; 1048 struct iovec *iov; 1049 socklen_t datalen; 1050 struct sockaddr *sa; 1051 sa_family_t sa_family; 1052 void *data; 1053 int error; 1054 1055 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1056 if (error != 0) 1057 return (error); 1058 1059 /* 1060 * Some Linux applications (ping) define a non-NULL control data 1061 * pointer, but a msg_controllen of 0, which is not allowed in the 1062 * FreeBSD system call interface. NULL the msg_control pointer in 1063 * order to handle this case. This should be checked, but allows the 1064 * Linux ping to work. 1065 */ 1066 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) 1067 linux_msg.msg_control = PTROUT(NULL); 1068 1069 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1070 if (error != 0) 1071 return (error); 1072 1073#ifdef COMPAT_LINUX32 1074 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1075 &iov, EMSGSIZE); 1076#else 1077 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1078#endif 1079 if (error != 0) 1080 return (error); 1081 1082 control = NULL; 1083 cmsg = NULL; 1084 1085 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { 1086 error = kern_getsockname(td, s, &sa, &datalen); 1087 if (error != 0) 1088 goto bad; 1089 sa_family = sa->sa_family; 1090 free(sa, M_SONAME); 1091 1092 error = ENOBUFS; 1093 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO); 1094 control = m_get(M_WAITOK, MT_CONTROL); 1095 if (control == NULL) 1096 goto bad; 1097 1098 do { 1099 error = copyin(ptr_cmsg, &linux_cmsg, 1100 sizeof(struct l_cmsghdr)); 1101 if (error != 0) 1102 goto bad; 1103 1104 error = EINVAL; 1105 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) 1106 goto bad; 1107 1108 /* 1109 * Now we support only SCM_RIGHTS and SCM_CRED, 1110 * so return EINVAL in any other cmsg_type 1111 */ 1112 cmsg->cmsg_type = 1113 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1114 cmsg->cmsg_level = 1115 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1116 if (cmsg->cmsg_type == -1 1117 || cmsg->cmsg_level != SOL_SOCKET) 1118 goto bad; 1119 1120 /* 1121 * Some applications (e.g. pulseaudio) attempt to 1122 * send ancillary data even if the underlying protocol 1123 * doesn't support it which is not allowed in the 1124 * FreeBSD system call interface. 1125 */ 1126 if (sa_family != AF_UNIX) 1127 continue; 1128 1129 data = LINUX_CMSG_DATA(ptr_cmsg); 1130 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1131 1132 switch (cmsg->cmsg_type) 1133 { 1134 case SCM_RIGHTS: 1135 break; 1136 1137 case SCM_CREDS: 1138 data = &cmcred; 1139 datalen = sizeof(cmcred); 1140 1141 /* 1142 * The lower levels will fill in the structure 1143 */ 1144 bzero(data, datalen); 1145 break; 1146 } 1147 1148 cmsg->cmsg_len = CMSG_LEN(datalen); 1149 1150 error = ENOBUFS; 1151 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg)) 1152 goto bad; 1153 if (!m_append(control, datalen, (c_caddr_t)data)) 1154 goto bad; 1155 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); 1156 1157 if (m_length(control, NULL) == 0) { 1158 m_freem(control); 1159 control = NULL; 1160 } 1161 } 1162 1163 msg.msg_iov = iov; 1164 msg.msg_flags = 0; 1165 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1166 1167bad: 1168 free(iov, M_IOV); 1169 if (cmsg) 1170 free(cmsg, M_LINUX); 1171 return (error); 1172} 1173 1174int 1175linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1176{ 1177 1178 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1179 args->flags)); 1180} 1181 1182int 1183linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1184{ 1185 struct l_mmsghdr *msg; 1186 l_uint retval; 1187 int error, datagrams; 1188 1189 if (args->vlen > UIO_MAXIOV) 1190 args->vlen = UIO_MAXIOV; 1191 1192 msg = PTRIN(args->msg); 1193 datagrams = 0; 1194 while (datagrams < args->vlen) { 1195 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1196 args->flags); 1197 if (error != 0) 1198 break; 1199 1200 retval = td->td_retval[0]; 1201 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1202 if (error != 0) 1203 break; 1204 ++msg; 1205 ++datagrams; 1206 } 1207 if (error == 0) 1208 td->td_retval[0] = datagrams; 1209 return (error); 1210} 1211 1212static int 1213linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1214 l_uint flags, struct msghdr *msg) 1215{ 1216 struct cmsghdr *cm; 1217 struct cmsgcred *cmcred; 1218 struct l_cmsghdr *linux_cmsg = NULL; 1219 struct l_ucred linux_ucred; 1220 socklen_t datalen, outlen; 1221 struct l_msghdr linux_msg; 1222 struct iovec *iov, *uiov; 1223 struct mbuf *control = NULL; 1224 struct mbuf **controlp; 1225 caddr_t outbuf; 1226 void *data; 1227 int error, i, fd, fds, *fdp; 1228 1229 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1230 if (error != 0) 1231 return (error); 1232 1233 error = linux_to_bsd_msghdr(msg, &linux_msg); 1234 if (error != 0) 1235 return (error); 1236 1237#ifdef COMPAT_LINUX32 1238 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1239 &iov, EMSGSIZE); 1240#else 1241 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1242#endif 1243 if (error != 0) 1244 return (error); 1245 1246 if (msg->msg_name) { 1247 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name, 1248 msg->msg_namelen); 1249 if (error != 0) 1250 goto bad; 1251 } 1252 1253 uiov = msg->msg_iov; 1254 msg->msg_iov = iov; 1255 controlp = (msg->msg_control != NULL) ? &control : NULL; 1256 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp); 1257 msg->msg_iov = uiov; 1258 if (error != 0) 1259 goto bad; 1260 1261 error = bsd_to_linux_msghdr(msg, &linux_msg); 1262 if (error != 0) 1263 goto bad; 1264 1265 if (linux_msg.msg_name) { 1266 error = bsd_to_linux_sockaddr((struct sockaddr *) 1267 PTRIN(linux_msg.msg_name)); 1268 if (error != 0) 1269 goto bad; 1270 } 1271 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1272 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1273 if (error != 0) 1274 goto bad; 1275 } 1276 1277 outbuf = PTRIN(linux_msg.msg_control); 1278 outlen = 0; 1279 1280 if (control) { 1281 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1282 1283 msg->msg_control = mtod(control, struct cmsghdr *); 1284 msg->msg_controllen = control->m_len; 1285 1286 cm = CMSG_FIRSTHDR(msg); 1287 1288 while (cm != NULL) { 1289 linux_cmsg->cmsg_type = 1290 bsd_to_linux_cmsg_type(cm->cmsg_type); 1291 linux_cmsg->cmsg_level = 1292 bsd_to_linux_sockopt_level(cm->cmsg_level); 1293 if (linux_cmsg->cmsg_type == -1 1294 || cm->cmsg_level != SOL_SOCKET) 1295 { 1296 error = EINVAL; 1297 goto bad; 1298 } 1299 1300 data = CMSG_DATA(cm); 1301 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1302 1303 switch (cm->cmsg_type) 1304 { 1305 case SCM_RIGHTS: 1306 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1307 fds = datalen / sizeof(int); 1308 fdp = data; 1309 for (i = 0; i < fds; i++) { 1310 fd = *fdp++; 1311 (void)kern_fcntl(td, fd, 1312 F_SETFD, FD_CLOEXEC); 1313 } 1314 } 1315 break; 1316 1317 case SCM_CREDS: 1318 /* 1319 * Currently LOCAL_CREDS is never in 1320 * effect for Linux so no need to worry 1321 * about sockcred 1322 */ 1323 if (datalen != sizeof(*cmcred)) { 1324 error = EMSGSIZE; 1325 goto bad; 1326 } 1327 cmcred = (struct cmsgcred *)data; 1328 bzero(&linux_ucred, sizeof(linux_ucred)); 1329 linux_ucred.pid = cmcred->cmcred_pid; 1330 linux_ucred.uid = cmcred->cmcred_uid; 1331 linux_ucred.gid = cmcred->cmcred_gid; 1332 data = &linux_ucred; 1333 datalen = sizeof(linux_ucred); 1334 break; 1335 } 1336 1337 if (outlen + LINUX_CMSG_LEN(datalen) > 1338 linux_msg.msg_controllen) { 1339 if (outlen == 0) { 1340 error = EMSGSIZE; 1341 goto bad; 1342 } else { 1343 linux_msg.msg_flags |= 1344 LINUX_MSG_CTRUNC; 1345 goto out; 1346 } 1347 } 1348 1349 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1350 1351 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1352 if (error) 1353 goto bad; 1354 outbuf += L_CMSG_HDRSZ; 1355 1356 error = copyout(data, outbuf, datalen); 1357 if (error) 1358 goto bad; 1359 1360 outbuf += LINUX_CMSG_ALIGN(datalen); 1361 outlen += LINUX_CMSG_LEN(datalen); 1362 1363 cm = CMSG_NXTHDR(msg, cm); 1364 } 1365 } 1366 1367out: 1368 linux_msg.msg_controllen = outlen; 1369 error = copyout(&linux_msg, msghdr, sizeof(linux_msg)); 1370 1371bad: 1372 free(iov, M_IOV); 1373 m_freem(control); 1374 free(linux_cmsg, M_LINUX); 1375 1376 return (error); 1377} 1378 1379int 1380linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1381{ 1382 struct msghdr bsd_msg; 1383 1384 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1385 args->flags, &bsd_msg)); 1386} 1387 1388int 1389linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1390{ 1391 struct l_mmsghdr *msg; 1392 struct msghdr bsd_msg; 1393 struct l_timespec lts; 1394 struct timespec ts, tts; 1395 l_uint retval; 1396 int error, datagrams; 1397 1398 if (args->timeout) { 1399 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1400 if (error != 0) 1401 return (error); 1402 error = linux_to_native_timespec(&ts, <s); 1403 if (error != 0) 1404 return (error); 1405 getnanotime(&tts); 1406 timespecadd(&tts, &ts); 1407 } 1408 1409 msg = PTRIN(args->msg); 1410 datagrams = 0; 1411 while (datagrams < args->vlen) { 1412 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1413 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1414 if (error != 0) 1415 break; 1416 1417 retval = td->td_retval[0]; 1418 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1419 if (error != 0) 1420 break; 1421 ++msg; 1422 ++datagrams; 1423 1424 /* 1425 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1426 */ 1427 if (args->flags & LINUX_MSG_WAITFORONE) 1428 args->flags |= LINUX_MSG_DONTWAIT; 1429 1430 /* 1431 * See BUGS section of recvmmsg(2). 1432 */ 1433 if (args->timeout) { 1434 getnanotime(&ts); 1435 timespecsub(&ts, &tts); 1436 if (!timespecisset(&ts) || ts.tv_sec > 0) 1437 break; 1438 } 1439 /* Out of band data, return right away. */ 1440 if (bsd_msg.msg_flags & MSG_OOB) 1441 break; 1442 } 1443 if (error == 0) 1444 td->td_retval[0] = datagrams; 1445 return (error); 1446} 1447 1448int 1449linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1450{ 1451 struct shutdown_args /* { 1452 int s; 1453 int how; 1454 } */ bsd_args; 1455 1456 bsd_args.s = args->s; 1457 bsd_args.how = args->how; 1458 return (sys_shutdown(td, &bsd_args)); 1459} 1460 1461int 1462linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1463{ 1464 struct setsockopt_args /* { 1465 int s; 1466 int level; 1467 int name; 1468 caddr_t val; 1469 int valsize; 1470 } */ bsd_args; 1471 l_timeval linux_tv; 1472 struct timeval tv; 1473 int error, name; 1474 1475 bsd_args.s = args->s; 1476 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1477 switch (bsd_args.level) { 1478 case SOL_SOCKET: 1479 name = linux_to_bsd_so_sockopt(args->optname); 1480 switch (name) { 1481 case SO_RCVTIMEO: 1482 /* FALLTHROUGH */ 1483 case SO_SNDTIMEO: 1484 error = copyin(PTRIN(args->optval), &linux_tv, 1485 sizeof(linux_tv)); 1486 if (error) 1487 return (error); 1488 tv.tv_sec = linux_tv.tv_sec; 1489 tv.tv_usec = linux_tv.tv_usec; 1490 return (kern_setsockopt(td, args->s, bsd_args.level, 1491 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1492 /* NOTREACHED */ 1493 break; 1494 default: 1495 break; 1496 } 1497 break; 1498 case IPPROTO_IP: 1499 name = linux_to_bsd_ip_sockopt(args->optname); 1500 break; 1501 case IPPROTO_TCP: 1502 name = linux_to_bsd_tcp_sockopt(args->optname); 1503 break; 1504 default: 1505 name = -1; 1506 break; 1507 } 1508 if (name == -1) 1509 return (ENOPROTOOPT); 1510 1511 bsd_args.name = name; 1512 bsd_args.val = PTRIN(args->optval); 1513 bsd_args.valsize = args->optlen; 1514 1515 if (name == IPV6_NEXTHOP) { 1516 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1517 bsd_args.valsize); 1518 error = sys_setsockopt(td, &bsd_args); 1519 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1520 } else 1521 error = sys_setsockopt(td, &bsd_args); 1522 1523 return (error); 1524} 1525 1526int 1527linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1528{ 1529 struct getsockopt_args /* { 1530 int s; 1531 int level; 1532 int name; 1533 caddr_t val; 1534 int *avalsize; 1535 } */ bsd_args; 1536 l_timeval linux_tv; 1537 struct timeval tv; 1538 socklen_t tv_len, xulen; 1539 struct xucred xu; 1540 struct l_ucred lxu; 1541 int error, name; 1542 1543 bsd_args.s = args->s; 1544 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1545 switch (bsd_args.level) { 1546 case SOL_SOCKET: 1547 name = linux_to_bsd_so_sockopt(args->optname); 1548 switch (name) { 1549 case SO_RCVTIMEO: 1550 /* FALLTHROUGH */ 1551 case SO_SNDTIMEO: 1552 tv_len = sizeof(tv); 1553 error = kern_getsockopt(td, args->s, bsd_args.level, 1554 name, &tv, UIO_SYSSPACE, &tv_len); 1555 if (error) 1556 return (error); 1557 linux_tv.tv_sec = tv.tv_sec; 1558 linux_tv.tv_usec = tv.tv_usec; 1559 return (copyout(&linux_tv, PTRIN(args->optval), 1560 sizeof(linux_tv))); 1561 /* NOTREACHED */ 1562 break; 1563 case LOCAL_PEERCRED: 1564 if (args->optlen != sizeof(lxu)) 1565 return (EINVAL); 1566 xulen = sizeof(xu); 1567 error = kern_getsockopt(td, args->s, bsd_args.level, 1568 name, &xu, UIO_SYSSPACE, &xulen); 1569 if (error) 1570 return (error); 1571 /* 1572 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1573 */ 1574 lxu.pid = 0; 1575 lxu.uid = xu.cr_uid; 1576 lxu.gid = xu.cr_gid; 1577 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1578 /* NOTREACHED */ 1579 break; 1580 default: 1581 break; 1582 } 1583 break; 1584 case IPPROTO_IP: 1585 name = linux_to_bsd_ip_sockopt(args->optname); 1586 break; 1587 case IPPROTO_TCP: 1588 name = linux_to_bsd_tcp_sockopt(args->optname); 1589 break; 1590 default: 1591 name = -1; 1592 break; 1593 } 1594 if (name == -1) 1595 return (EINVAL); 1596 1597 bsd_args.name = name; 1598 bsd_args.val = PTRIN(args->optval); 1599 bsd_args.avalsize = PTRIN(args->optlen); 1600 1601 if (name == IPV6_NEXTHOP) { 1602 error = sys_getsockopt(td, &bsd_args); 1603 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1604 } else 1605 error = sys_getsockopt(td, &bsd_args); 1606 1607 return (error); 1608} 1609 1610#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1611 1612/* Argument list sizes for linux_socketcall */ 1613 1614#define LINUX_AL(x) ((x) * sizeof(l_ulong)) 1615 1616static const unsigned char lxs_args[] = { 1617 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, 1618 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, 1619 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, 1620 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, 1621 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, 1622 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, 1623 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, 1624 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, 1625 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, 1626 LINUX_AL(4) /* accept4 */, LINUX_AL(5) /* recvmmsg */, 1627 LINUX_AL(4) /* sendmmsg */ 1628}; 1629 1630#define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1 1631 1632int 1633linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1634{ 1635 l_ulong a[6]; 1636 void *arg; 1637 int error; 1638 1639 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) 1640 return (EINVAL); 1641 error = copyin(PTRIN(args->args), a, lxs_args[args->what]); 1642 if (error) 1643 return (error); 1644 1645 arg = a; 1646 switch (args->what) { 1647 case LINUX_SOCKET: 1648 return (linux_socket(td, arg)); 1649 case LINUX_BIND: 1650 return (linux_bind(td, arg)); 1651 case LINUX_CONNECT: 1652 return (linux_connect(td, arg)); 1653 case LINUX_LISTEN: 1654 return (linux_listen(td, arg)); 1655 case LINUX_ACCEPT: 1656 return (linux_accept(td, arg)); 1657 case LINUX_GETSOCKNAME: 1658 return (linux_getsockname(td, arg)); 1659 case LINUX_GETPEERNAME: 1660 return (linux_getpeername(td, arg)); 1661 case LINUX_SOCKETPAIR: 1662 return (linux_socketpair(td, arg)); 1663 case LINUX_SEND: 1664 return (linux_send(td, arg)); 1665 case LINUX_RECV: 1666 return (linux_recv(td, arg)); 1667 case LINUX_SENDTO: 1668 return (linux_sendto(td, arg)); 1669 case LINUX_RECVFROM: 1670 return (linux_recvfrom(td, arg)); 1671 case LINUX_SHUTDOWN: 1672 return (linux_shutdown(td, arg)); 1673 case LINUX_SETSOCKOPT: 1674 return (linux_setsockopt(td, arg)); 1675 case LINUX_GETSOCKOPT: 1676 return (linux_getsockopt(td, arg)); 1677 case LINUX_SENDMSG: 1678 return (linux_sendmsg(td, arg)); 1679 case LINUX_RECVMSG: 1680 return (linux_recvmsg(td, arg)); 1681 case LINUX_ACCEPT4: 1682 return (linux_accept4(td, arg)); 1683 case LINUX_RECVMMSG: 1684 return (linux_recvmmsg(td, arg)); 1685 case LINUX_SENDMMSG: 1686 return (linux_sendmmsg(td, arg)); 1687 } 1688 1689 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1690 return (ENOSYS); 1691} 1692#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1693