linux_socket.c revision 283494
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 283494 2015-05-24 18:10:07Z 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 1096 do { 1097 error = copyin(ptr_cmsg, &linux_cmsg, 1098 sizeof(struct l_cmsghdr)); 1099 if (error != 0) 1100 goto bad; 1101 1102 error = EINVAL; 1103 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) 1104 goto bad; 1105 1106 /* 1107 * Now we support only SCM_RIGHTS and SCM_CRED, 1108 * so return EINVAL in any other cmsg_type 1109 */ 1110 cmsg->cmsg_type = 1111 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1112 cmsg->cmsg_level = 1113 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1114 if (cmsg->cmsg_type == -1 1115 || cmsg->cmsg_level != SOL_SOCKET) 1116 goto bad; 1117 1118 /* 1119 * Some applications (e.g. pulseaudio) attempt to 1120 * send ancillary data even if the underlying protocol 1121 * doesn't support it which is not allowed in the 1122 * FreeBSD system call interface. 1123 */ 1124 if (sa_family != AF_UNIX) 1125 continue; 1126 1127 data = LINUX_CMSG_DATA(ptr_cmsg); 1128 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1129 1130 switch (cmsg->cmsg_type) 1131 { 1132 case SCM_RIGHTS: 1133 break; 1134 1135 case SCM_CREDS: 1136 data = &cmcred; 1137 datalen = sizeof(cmcred); 1138 1139 /* 1140 * The lower levels will fill in the structure 1141 */ 1142 bzero(data, datalen); 1143 break; 1144 } 1145 1146 cmsg->cmsg_len = CMSG_LEN(datalen); 1147 1148 error = ENOBUFS; 1149 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg)) 1150 goto bad; 1151 if (!m_append(control, datalen, (c_caddr_t)data)) 1152 goto bad; 1153 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); 1154 1155 if (m_length(control, NULL) == 0) { 1156 m_freem(control); 1157 control = NULL; 1158 } 1159 } 1160 1161 msg.msg_iov = iov; 1162 msg.msg_flags = 0; 1163 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1164 1165bad: 1166 m_freem(control); 1167 free(iov, M_IOV); 1168 if (cmsg) 1169 free(cmsg, M_LINUX); 1170 return (error); 1171} 1172 1173int 1174linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1175{ 1176 1177 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1178 args->flags)); 1179} 1180 1181int 1182linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1183{ 1184 struct l_mmsghdr *msg; 1185 l_uint retval; 1186 int error, datagrams; 1187 1188 if (args->vlen > UIO_MAXIOV) 1189 args->vlen = UIO_MAXIOV; 1190 1191 msg = PTRIN(args->msg); 1192 datagrams = 0; 1193 while (datagrams < args->vlen) { 1194 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1195 args->flags); 1196 if (error != 0) 1197 break; 1198 1199 retval = td->td_retval[0]; 1200 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1201 if (error != 0) 1202 break; 1203 ++msg; 1204 ++datagrams; 1205 } 1206 if (error == 0) 1207 td->td_retval[0] = datagrams; 1208 return (error); 1209} 1210 1211static int 1212linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1213 l_uint flags, struct msghdr *msg) 1214{ 1215 struct cmsghdr *cm; 1216 struct cmsgcred *cmcred; 1217 struct l_cmsghdr *linux_cmsg = NULL; 1218 struct l_ucred linux_ucred; 1219 socklen_t datalen, outlen; 1220 struct l_msghdr linux_msg; 1221 struct iovec *iov, *uiov; 1222 struct mbuf *control = NULL; 1223 struct mbuf **controlp; 1224 caddr_t outbuf; 1225 void *data; 1226 int error, i, fd, fds, *fdp; 1227 1228 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1229 if (error != 0) 1230 return (error); 1231 1232 error = linux_to_bsd_msghdr(msg, &linux_msg); 1233 if (error != 0) 1234 return (error); 1235 1236#ifdef COMPAT_LINUX32 1237 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1238 &iov, EMSGSIZE); 1239#else 1240 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1241#endif 1242 if (error != 0) 1243 return (error); 1244 1245 if (msg->msg_name) { 1246 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name, 1247 msg->msg_namelen); 1248 if (error != 0) 1249 goto bad; 1250 } 1251 1252 uiov = msg->msg_iov; 1253 msg->msg_iov = iov; 1254 controlp = (msg->msg_control != NULL) ? &control : NULL; 1255 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp); 1256 msg->msg_iov = uiov; 1257 if (error != 0) 1258 goto bad; 1259 1260 error = bsd_to_linux_msghdr(msg, &linux_msg); 1261 if (error != 0) 1262 goto bad; 1263 1264 if (linux_msg.msg_name) { 1265 error = bsd_to_linux_sockaddr((struct sockaddr *) 1266 PTRIN(linux_msg.msg_name)); 1267 if (error != 0) 1268 goto bad; 1269 } 1270 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1271 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1272 if (error != 0) 1273 goto bad; 1274 } 1275 1276 outbuf = PTRIN(linux_msg.msg_control); 1277 outlen = 0; 1278 1279 if (control) { 1280 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1281 1282 msg->msg_control = mtod(control, struct cmsghdr *); 1283 msg->msg_controllen = control->m_len; 1284 1285 cm = CMSG_FIRSTHDR(msg); 1286 1287 while (cm != NULL) { 1288 linux_cmsg->cmsg_type = 1289 bsd_to_linux_cmsg_type(cm->cmsg_type); 1290 linux_cmsg->cmsg_level = 1291 bsd_to_linux_sockopt_level(cm->cmsg_level); 1292 if (linux_cmsg->cmsg_type == -1 1293 || cm->cmsg_level != SOL_SOCKET) 1294 { 1295 error = EINVAL; 1296 goto bad; 1297 } 1298 1299 data = CMSG_DATA(cm); 1300 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1301 1302 switch (cm->cmsg_type) 1303 { 1304 case SCM_RIGHTS: 1305 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1306 fds = datalen / sizeof(int); 1307 fdp = data; 1308 for (i = 0; i < fds; i++) { 1309 fd = *fdp++; 1310 (void)kern_fcntl(td, fd, 1311 F_SETFD, FD_CLOEXEC); 1312 } 1313 } 1314 break; 1315 1316 case SCM_CREDS: 1317 /* 1318 * Currently LOCAL_CREDS is never in 1319 * effect for Linux so no need to worry 1320 * about sockcred 1321 */ 1322 if (datalen != sizeof(*cmcred)) { 1323 error = EMSGSIZE; 1324 goto bad; 1325 } 1326 cmcred = (struct cmsgcred *)data; 1327 bzero(&linux_ucred, sizeof(linux_ucred)); 1328 linux_ucred.pid = cmcred->cmcred_pid; 1329 linux_ucred.uid = cmcred->cmcred_uid; 1330 linux_ucred.gid = cmcred->cmcred_gid; 1331 data = &linux_ucred; 1332 datalen = sizeof(linux_ucred); 1333 break; 1334 } 1335 1336 if (outlen + LINUX_CMSG_LEN(datalen) > 1337 linux_msg.msg_controllen) { 1338 if (outlen == 0) { 1339 error = EMSGSIZE; 1340 goto bad; 1341 } else { 1342 linux_msg.msg_flags |= 1343 LINUX_MSG_CTRUNC; 1344 goto out; 1345 } 1346 } 1347 1348 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1349 1350 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1351 if (error) 1352 goto bad; 1353 outbuf += L_CMSG_HDRSZ; 1354 1355 error = copyout(data, outbuf, datalen); 1356 if (error) 1357 goto bad; 1358 1359 outbuf += LINUX_CMSG_ALIGN(datalen); 1360 outlen += LINUX_CMSG_LEN(datalen); 1361 1362 cm = CMSG_NXTHDR(msg, cm); 1363 } 1364 } 1365 1366out: 1367 linux_msg.msg_controllen = outlen; 1368 error = copyout(&linux_msg, msghdr, sizeof(linux_msg)); 1369 1370bad: 1371 free(iov, M_IOV); 1372 m_freem(control); 1373 free(linux_cmsg, M_LINUX); 1374 1375 return (error); 1376} 1377 1378int 1379linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1380{ 1381 struct msghdr bsd_msg; 1382 1383 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1384 args->flags, &bsd_msg)); 1385} 1386 1387int 1388linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1389{ 1390 struct l_mmsghdr *msg; 1391 struct msghdr bsd_msg; 1392 struct l_timespec lts; 1393 struct timespec ts, tts; 1394 l_uint retval; 1395 int error, datagrams; 1396 1397 if (args->timeout) { 1398 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1399 if (error != 0) 1400 return (error); 1401 error = linux_to_native_timespec(&ts, <s); 1402 if (error != 0) 1403 return (error); 1404 getnanotime(&tts); 1405 timespecadd(&tts, &ts); 1406 } 1407 1408 msg = PTRIN(args->msg); 1409 datagrams = 0; 1410 while (datagrams < args->vlen) { 1411 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1412 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1413 if (error != 0) 1414 break; 1415 1416 retval = td->td_retval[0]; 1417 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1418 if (error != 0) 1419 break; 1420 ++msg; 1421 ++datagrams; 1422 1423 /* 1424 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1425 */ 1426 if (args->flags & LINUX_MSG_WAITFORONE) 1427 args->flags |= LINUX_MSG_DONTWAIT; 1428 1429 /* 1430 * See BUGS section of recvmmsg(2). 1431 */ 1432 if (args->timeout) { 1433 getnanotime(&ts); 1434 timespecsub(&ts, &tts); 1435 if (!timespecisset(&ts) || ts.tv_sec > 0) 1436 break; 1437 } 1438 /* Out of band data, return right away. */ 1439 if (bsd_msg.msg_flags & MSG_OOB) 1440 break; 1441 } 1442 if (error == 0) 1443 td->td_retval[0] = datagrams; 1444 return (error); 1445} 1446 1447int 1448linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1449{ 1450 struct shutdown_args /* { 1451 int s; 1452 int how; 1453 } */ bsd_args; 1454 1455 bsd_args.s = args->s; 1456 bsd_args.how = args->how; 1457 return (sys_shutdown(td, &bsd_args)); 1458} 1459 1460int 1461linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1462{ 1463 struct setsockopt_args /* { 1464 int s; 1465 int level; 1466 int name; 1467 caddr_t val; 1468 int valsize; 1469 } */ bsd_args; 1470 l_timeval linux_tv; 1471 struct timeval tv; 1472 int error, name; 1473 1474 bsd_args.s = args->s; 1475 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1476 switch (bsd_args.level) { 1477 case SOL_SOCKET: 1478 name = linux_to_bsd_so_sockopt(args->optname); 1479 switch (name) { 1480 case SO_RCVTIMEO: 1481 /* FALLTHROUGH */ 1482 case SO_SNDTIMEO: 1483 error = copyin(PTRIN(args->optval), &linux_tv, 1484 sizeof(linux_tv)); 1485 if (error) 1486 return (error); 1487 tv.tv_sec = linux_tv.tv_sec; 1488 tv.tv_usec = linux_tv.tv_usec; 1489 return (kern_setsockopt(td, args->s, bsd_args.level, 1490 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1491 /* NOTREACHED */ 1492 break; 1493 default: 1494 break; 1495 } 1496 break; 1497 case IPPROTO_IP: 1498 name = linux_to_bsd_ip_sockopt(args->optname); 1499 break; 1500 case IPPROTO_TCP: 1501 name = linux_to_bsd_tcp_sockopt(args->optname); 1502 break; 1503 default: 1504 name = -1; 1505 break; 1506 } 1507 if (name == -1) 1508 return (ENOPROTOOPT); 1509 1510 bsd_args.name = name; 1511 bsd_args.val = PTRIN(args->optval); 1512 bsd_args.valsize = args->optlen; 1513 1514 if (name == IPV6_NEXTHOP) { 1515 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1516 bsd_args.valsize); 1517 error = sys_setsockopt(td, &bsd_args); 1518 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1519 } else 1520 error = sys_setsockopt(td, &bsd_args); 1521 1522 return (error); 1523} 1524 1525int 1526linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1527{ 1528 struct getsockopt_args /* { 1529 int s; 1530 int level; 1531 int name; 1532 caddr_t val; 1533 int *avalsize; 1534 } */ bsd_args; 1535 l_timeval linux_tv; 1536 struct timeval tv; 1537 socklen_t tv_len, xulen; 1538 struct xucred xu; 1539 struct l_ucred lxu; 1540 int error, name; 1541 1542 bsd_args.s = args->s; 1543 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1544 switch (bsd_args.level) { 1545 case SOL_SOCKET: 1546 name = linux_to_bsd_so_sockopt(args->optname); 1547 switch (name) { 1548 case SO_RCVTIMEO: 1549 /* FALLTHROUGH */ 1550 case SO_SNDTIMEO: 1551 tv_len = sizeof(tv); 1552 error = kern_getsockopt(td, args->s, bsd_args.level, 1553 name, &tv, UIO_SYSSPACE, &tv_len); 1554 if (error) 1555 return (error); 1556 linux_tv.tv_sec = tv.tv_sec; 1557 linux_tv.tv_usec = tv.tv_usec; 1558 return (copyout(&linux_tv, PTRIN(args->optval), 1559 sizeof(linux_tv))); 1560 /* NOTREACHED */ 1561 break; 1562 case LOCAL_PEERCRED: 1563 if (args->optlen != sizeof(lxu)) 1564 return (EINVAL); 1565 xulen = sizeof(xu); 1566 error = kern_getsockopt(td, args->s, bsd_args.level, 1567 name, &xu, UIO_SYSSPACE, &xulen); 1568 if (error) 1569 return (error); 1570 /* 1571 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1572 */ 1573 lxu.pid = 0; 1574 lxu.uid = xu.cr_uid; 1575 lxu.gid = xu.cr_gid; 1576 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1577 /* NOTREACHED */ 1578 break; 1579 default: 1580 break; 1581 } 1582 break; 1583 case IPPROTO_IP: 1584 name = linux_to_bsd_ip_sockopt(args->optname); 1585 break; 1586 case IPPROTO_TCP: 1587 name = linux_to_bsd_tcp_sockopt(args->optname); 1588 break; 1589 default: 1590 name = -1; 1591 break; 1592 } 1593 if (name == -1) 1594 return (EINVAL); 1595 1596 bsd_args.name = name; 1597 bsd_args.val = PTRIN(args->optval); 1598 bsd_args.avalsize = PTRIN(args->optlen); 1599 1600 if (name == IPV6_NEXTHOP) { 1601 error = sys_getsockopt(td, &bsd_args); 1602 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1603 } else 1604 error = sys_getsockopt(td, &bsd_args); 1605 1606 return (error); 1607} 1608 1609#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1610 1611/* Argument list sizes for linux_socketcall */ 1612 1613#define LINUX_AL(x) ((x) * sizeof(l_ulong)) 1614 1615static const unsigned char lxs_args[] = { 1616 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, 1617 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, 1618 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, 1619 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, 1620 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, 1621 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, 1622 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, 1623 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, 1624 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, 1625 LINUX_AL(4) /* accept4 */, LINUX_AL(5) /* recvmmsg */, 1626 LINUX_AL(4) /* sendmmsg */ 1627}; 1628 1629#define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1 1630 1631int 1632linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1633{ 1634 l_ulong a[6]; 1635 void *arg; 1636 int error; 1637 1638 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) 1639 return (EINVAL); 1640 error = copyin(PTRIN(args->args), a, lxs_args[args->what]); 1641 if (error) 1642 return (error); 1643 1644 arg = a; 1645 switch (args->what) { 1646 case LINUX_SOCKET: 1647 return (linux_socket(td, arg)); 1648 case LINUX_BIND: 1649 return (linux_bind(td, arg)); 1650 case LINUX_CONNECT: 1651 return (linux_connect(td, arg)); 1652 case LINUX_LISTEN: 1653 return (linux_listen(td, arg)); 1654 case LINUX_ACCEPT: 1655 return (linux_accept(td, arg)); 1656 case LINUX_GETSOCKNAME: 1657 return (linux_getsockname(td, arg)); 1658 case LINUX_GETPEERNAME: 1659 return (linux_getpeername(td, arg)); 1660 case LINUX_SOCKETPAIR: 1661 return (linux_socketpair(td, arg)); 1662 case LINUX_SEND: 1663 return (linux_send(td, arg)); 1664 case LINUX_RECV: 1665 return (linux_recv(td, arg)); 1666 case LINUX_SENDTO: 1667 return (linux_sendto(td, arg)); 1668 case LINUX_RECVFROM: 1669 return (linux_recvfrom(td, arg)); 1670 case LINUX_SHUTDOWN: 1671 return (linux_shutdown(td, arg)); 1672 case LINUX_SETSOCKOPT: 1673 return (linux_setsockopt(td, arg)); 1674 case LINUX_GETSOCKOPT: 1675 return (linux_getsockopt(td, arg)); 1676 case LINUX_SENDMSG: 1677 return (linux_sendmsg(td, arg)); 1678 case LINUX_RECVMSG: 1679 return (linux_recvmsg(td, arg)); 1680 case LINUX_ACCEPT4: 1681 return (linux_accept4(td, arg)); 1682 case LINUX_RECVMMSG: 1683 return (linux_recvmmsg(td, arg)); 1684 case LINUX_SENDMMSG: 1685 return (linux_sendmmsg(td, arg)); 1686 } 1687 1688 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1689 return (ENOSYS); 1690} 1691#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1692