linux_socket.c revision 283497
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 283497 2015-05-24 18:13:21Z 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 case SCM_TIMESTAMP: 487 return (LINUX_SCM_TIMESTAMP); 488 } 489 return (-1); 490} 491 492static int 493linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 494{ 495 if (lhdr->msg_controllen > INT_MAX) 496 return (ENOBUFS); 497 498 bhdr->msg_name = PTRIN(lhdr->msg_name); 499 bhdr->msg_namelen = lhdr->msg_namelen; 500 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 501 bhdr->msg_iovlen = lhdr->msg_iovlen; 502 bhdr->msg_control = PTRIN(lhdr->msg_control); 503 504 /* 505 * msg_controllen is skipped since BSD and LINUX control messages 506 * are potentially different sizes (e.g. the cred structure used 507 * by SCM_CREDS is different between the two operating system). 508 * 509 * The caller can set it (if necessary) after converting all the 510 * control messages. 511 */ 512 513 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 514 return (0); 515} 516 517static int 518bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 519{ 520 lhdr->msg_name = PTROUT(bhdr->msg_name); 521 lhdr->msg_namelen = bhdr->msg_namelen; 522 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 523 lhdr->msg_iovlen = bhdr->msg_iovlen; 524 lhdr->msg_control = PTROUT(bhdr->msg_control); 525 526 /* 527 * msg_controllen is skipped since BSD and LINUX control messages 528 * are potentially different sizes (e.g. the cred structure used 529 * by SCM_CREDS is different between the two operating system). 530 * 531 * The caller can set it (if necessary) after converting all the 532 * control messages. 533 */ 534 535 /* msg_flags skipped */ 536 return (0); 537} 538 539static int 540linux_set_socket_flags(int lflags, int *flags) 541{ 542 543 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 544 return (EINVAL); 545 if (lflags & LINUX_SOCK_NONBLOCK) 546 *flags |= SOCK_NONBLOCK; 547 if (lflags & LINUX_SOCK_CLOEXEC) 548 *flags |= SOCK_CLOEXEC; 549 return (0); 550} 551 552static int 553linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 554 struct mbuf *control, enum uio_seg segflg) 555{ 556 struct sockaddr *to; 557 int error; 558 559 if (mp->msg_name != NULL) { 560 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); 561 if (error) 562 return (error); 563 mp->msg_name = to; 564 } else 565 to = NULL; 566 567 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 568 segflg); 569 570 if (to) 571 free(to, M_SONAME); 572 return (error); 573} 574 575/* Return 0 if IP_HDRINCL is set for the given socket. */ 576static int 577linux_check_hdrincl(struct thread *td, int s) 578{ 579 int error, optval; 580 socklen_t size_val; 581 582 size_val = sizeof(optval); 583 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 584 &optval, UIO_SYSSPACE, &size_val); 585 if (error) 586 return (error); 587 588 return (optval == 0); 589} 590 591/* 592 * Updated sendto() when IP_HDRINCL is set: 593 * tweak endian-dependent fields in the IP packet. 594 */ 595static int 596linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 597{ 598/* 599 * linux_ip_copysize defines how many bytes we should copy 600 * from the beginning of the IP packet before we customize it for BSD. 601 * It should include all the fields we modify (ip_len and ip_off). 602 */ 603#define linux_ip_copysize 8 604 605 struct ip *packet; 606 struct msghdr msg; 607 struct iovec aiov[1]; 608 int error; 609 610 /* Check that the packet isn't too big or too small. */ 611 if (linux_args->len < linux_ip_copysize || 612 linux_args->len > IP_MAXPACKET) 613 return (EINVAL); 614 615 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK); 616 617 /* Make kernel copy of the packet to be sent */ 618 if ((error = copyin(PTRIN(linux_args->msg), packet, 619 linux_args->len))) 620 goto goout; 621 622 /* Convert fields from Linux to BSD raw IP socket format */ 623 packet->ip_len = linux_args->len; 624 packet->ip_off = ntohs(packet->ip_off); 625 626 /* Prepare the msghdr and iovec structures describing the new packet */ 627 msg.msg_name = PTRIN(linux_args->to); 628 msg.msg_namelen = linux_args->tolen; 629 msg.msg_iov = aiov; 630 msg.msg_iovlen = 1; 631 msg.msg_control = NULL; 632 msg.msg_flags = 0; 633 aiov[0].iov_base = (char *)packet; 634 aiov[0].iov_len = linux_args->len; 635 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 636 NULL, UIO_SYSSPACE); 637goout: 638 free(packet, M_LINUX); 639 return (error); 640} 641 642int 643linux_socket(struct thread *td, struct linux_socket_args *args) 644{ 645 struct socket_args /* { 646 int domain; 647 int type; 648 int protocol; 649 } */ bsd_args; 650 int retval_socket; 651 652 bsd_args.protocol = args->protocol; 653 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 654 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 655 return (EINVAL); 656 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 657 &bsd_args.type); 658 if (retval_socket != 0) 659 return (retval_socket); 660 bsd_args.domain = linux_to_bsd_domain(args->domain); 661 if (bsd_args.domain == -1) 662 return (EAFNOSUPPORT); 663 664 retval_socket = sys_socket(td, &bsd_args); 665 if (retval_socket) 666 return (retval_socket); 667 668 if (bsd_args.type == SOCK_RAW 669 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) 670 && bsd_args.domain == PF_INET) { 671 /* It's a raw IP socket: set the IP_HDRINCL option. */ 672 int hdrincl; 673 674 hdrincl = 1; 675 /* We ignore any error returned by kern_setsockopt() */ 676 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 677 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 678 } 679#ifdef INET6 680 /* 681 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 682 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 683 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 684 * sysctl value. 685 */ 686 if (bsd_args.domain == PF_INET6) { 687 int v6only; 688 689 v6only = 0; 690 /* We ignore any error returned by setsockopt() */ 691 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 692 &v6only, UIO_SYSSPACE, sizeof(v6only)); 693 } 694#endif 695 696 return (retval_socket); 697} 698 699int 700linux_bind(struct thread *td, struct linux_bind_args *args) 701{ 702 struct sockaddr *sa; 703 int error; 704 705 error = linux_getsockaddr(&sa, PTRIN(args->name), 706 args->namelen); 707 if (error) 708 return (error); 709 710 error = kern_bindat(td, AT_FDCWD, args->s, sa); 711 free(sa, M_SONAME); 712 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 713 return (EINVAL); 714 return (error); 715} 716 717int 718linux_connect(struct thread *td, struct linux_connect_args *args) 719{ 720 cap_rights_t rights; 721 struct socket *so; 722 struct sockaddr *sa; 723 u_int fflag; 724 int error; 725 726 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), 727 args->namelen); 728 if (error) 729 return (error); 730 731 error = kern_connectat(td, AT_FDCWD, args->s, sa); 732 free(sa, M_SONAME); 733 if (error != EISCONN) 734 return (error); 735 736 /* 737 * Linux doesn't return EISCONN the first time it occurs, 738 * when on a non-blocking socket. Instead it returns the 739 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 740 * 741 * XXXRW: Instead of using fgetsock(), check that it is a 742 * socket and use the file descriptor reference instead of 743 * creating a new one. 744 */ 745 error = fgetsock(td, args->s, cap_rights_init(&rights, CAP_CONNECT), 746 &so, &fflag); 747 if (error == 0) { 748 error = EISCONN; 749 if (fflag & FNONBLOCK) { 750 SOCK_LOCK(so); 751 if (so->so_emuldata == 0) 752 error = so->so_error; 753 so->so_emuldata = (void *)1; 754 SOCK_UNLOCK(so); 755 } 756 fputsock(so); 757 } 758 return (error); 759} 760 761int 762linux_listen(struct thread *td, struct linux_listen_args *args) 763{ 764 struct listen_args /* { 765 int s; 766 int backlog; 767 } */ bsd_args; 768 769 bsd_args.s = args->s; 770 bsd_args.backlog = args->backlog; 771 return (sys_listen(td, &bsd_args)); 772} 773 774static int 775linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 776 l_uintptr_t namelen, int flags) 777{ 778 struct accept4_args /* { 779 int s; 780 struct sockaddr * __restrict name; 781 socklen_t * __restrict anamelen; 782 int flags; 783 } */ bsd_args; 784 int error; 785 786 bsd_args.s = s; 787 /* XXX: */ 788 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); 789 bsd_args.anamelen = PTRIN(namelen);/* XXX */ 790 error = linux_set_socket_flags(flags, &bsd_args.flags); 791 if (error != 0) 792 return (error); 793 error = sys_accept4(td, &bsd_args); 794 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); 795 if (error) { 796 if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) 797 return (EINVAL); 798 return (error); 799 } 800 if (addr) 801 error = linux_sa_put(PTRIN(addr)); 802 if (error) { 803 (void)kern_close(td, td->td_retval[0]); 804 td->td_retval[0] = 0; 805 } 806 return (error); 807} 808 809int 810linux_accept(struct thread *td, struct linux_accept_args *args) 811{ 812 813 return (linux_accept_common(td, args->s, args->addr, 814 args->namelen, 0)); 815} 816 817int 818linux_accept4(struct thread *td, struct linux_accept4_args *args) 819{ 820 821 return (linux_accept_common(td, args->s, args->addr, 822 args->namelen, args->flags)); 823} 824 825int 826linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 827{ 828 struct getsockname_args /* { 829 int fdes; 830 struct sockaddr * __restrict asa; 831 socklen_t * __restrict alen; 832 } */ bsd_args; 833 int error; 834 835 bsd_args.fdes = args->s; 836 /* XXX: */ 837 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); 838 bsd_args.alen = PTRIN(args->namelen); /* XXX */ 839 error = sys_getsockname(td, &bsd_args); 840 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 841 if (error) 842 return (error); 843 error = linux_sa_put(PTRIN(args->addr)); 844 if (error) 845 return (error); 846 return (0); 847} 848 849int 850linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 851{ 852 struct getpeername_args /* { 853 int fdes; 854 caddr_t asa; 855 int *alen; 856 } */ bsd_args; 857 int error; 858 859 bsd_args.fdes = args->s; 860 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); 861 bsd_args.alen = (socklen_t *)PTRIN(args->namelen); 862 error = sys_getpeername(td, &bsd_args); 863 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 864 if (error) 865 return (error); 866 error = linux_sa_put(PTRIN(args->addr)); 867 if (error) 868 return (error); 869 return (0); 870} 871 872int 873linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 874{ 875 struct socketpair_args /* { 876 int domain; 877 int type; 878 int protocol; 879 int *rsv; 880 } */ bsd_args; 881 int error; 882 883 bsd_args.domain = linux_to_bsd_domain(args->domain); 884 if (bsd_args.domain != PF_LOCAL) 885 return (EAFNOSUPPORT); 886 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 887 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 888 return (EINVAL); 889 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 890 &bsd_args.type); 891 if (error != 0) 892 return (error); 893 if (args->protocol != 0 && args->protocol != PF_UNIX) 894 895 /* 896 * Use of PF_UNIX as protocol argument is not right, 897 * but Linux does it. 898 * Do not map PF_UNIX as its Linux value is identical 899 * to FreeBSD one. 900 */ 901 return (EPROTONOSUPPORT); 902 else 903 bsd_args.protocol = 0; 904 bsd_args.rsv = (int *)PTRIN(args->rsv); 905 return (sys_socketpair(td, &bsd_args)); 906} 907 908#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 909struct linux_send_args { 910 int s; 911 l_uintptr_t msg; 912 int len; 913 int flags; 914}; 915 916static int 917linux_send(struct thread *td, struct linux_send_args *args) 918{ 919 struct sendto_args /* { 920 int s; 921 caddr_t buf; 922 int len; 923 int flags; 924 caddr_t to; 925 int tolen; 926 } */ bsd_args; 927 928 bsd_args.s = args->s; 929 bsd_args.buf = (caddr_t)PTRIN(args->msg); 930 bsd_args.len = args->len; 931 bsd_args.flags = args->flags; 932 bsd_args.to = NULL; 933 bsd_args.tolen = 0; 934 return sys_sendto(td, &bsd_args); 935} 936 937struct linux_recv_args { 938 int s; 939 l_uintptr_t msg; 940 int len; 941 int flags; 942}; 943 944static int 945linux_recv(struct thread *td, struct linux_recv_args *args) 946{ 947 struct recvfrom_args /* { 948 int s; 949 caddr_t buf; 950 int len; 951 int flags; 952 struct sockaddr *from; 953 socklen_t fromlenaddr; 954 } */ bsd_args; 955 956 bsd_args.s = args->s; 957 bsd_args.buf = (caddr_t)PTRIN(args->msg); 958 bsd_args.len = args->len; 959 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 960 bsd_args.from = NULL; 961 bsd_args.fromlenaddr = 0; 962 return (sys_recvfrom(td, &bsd_args)); 963} 964#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 965 966int 967linux_sendto(struct thread *td, struct linux_sendto_args *args) 968{ 969 struct msghdr msg; 970 struct iovec aiov; 971 int error; 972 973 if (linux_check_hdrincl(td, args->s) == 0) 974 /* IP_HDRINCL set, tweak the packet before sending */ 975 return (linux_sendto_hdrincl(td, args)); 976 977 msg.msg_name = PTRIN(args->to); 978 msg.msg_namelen = args->tolen; 979 msg.msg_iov = &aiov; 980 msg.msg_iovlen = 1; 981 msg.msg_control = NULL; 982 msg.msg_flags = 0; 983 aiov.iov_base = PTRIN(args->msg); 984 aiov.iov_len = args->len; 985 error = linux_sendit(td, args->s, &msg, args->flags, NULL, 986 UIO_USERSPACE); 987 return (error); 988} 989 990int 991linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 992{ 993 struct msghdr msg; 994 struct iovec aiov; 995 int error; 996 997 if (PTRIN(args->fromlen) != NULL) { 998 error = copyin(PTRIN(args->fromlen), &msg.msg_namelen, 999 sizeof(msg.msg_namelen)); 1000 if (error != 0) 1001 return (error); 1002 1003 error = linux_to_bsd_sockaddr((struct sockaddr *)PTRIN(args->from), 1004 msg.msg_namelen); 1005 if (error != 0) 1006 return (error); 1007 } else 1008 msg.msg_namelen = 0; 1009 1010 msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from); 1011 msg.msg_iov = &aiov; 1012 msg.msg_iovlen = 1; 1013 aiov.iov_base = PTRIN(args->buf); 1014 aiov.iov_len = args->len; 1015 msg.msg_control = 0; 1016 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1017 1018 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL); 1019 if (error != 0) 1020 return (error); 1021 1022 if (PTRIN(args->from) != NULL) { 1023 error = bsd_to_linux_sockaddr((struct sockaddr *) 1024 PTRIN(args->from)); 1025 if (error != 0) 1026 return (error); 1027 1028 error = linux_sa_put((struct osockaddr *) 1029 PTRIN(args->from)); 1030 } 1031 1032 if (PTRIN(args->fromlen) != NULL) 1033 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1034 sizeof(msg.msg_namelen)); 1035 1036 return (error); 1037} 1038 1039static int 1040linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1041 l_uint flags) 1042{ 1043 struct cmsghdr *cmsg; 1044 struct cmsgcred cmcred; 1045 struct mbuf *control; 1046 struct msghdr msg; 1047 struct l_cmsghdr linux_cmsg; 1048 struct l_cmsghdr *ptr_cmsg; 1049 struct l_msghdr linux_msg; 1050 struct iovec *iov; 1051 socklen_t datalen; 1052 struct sockaddr *sa; 1053 sa_family_t sa_family; 1054 void *data; 1055 int error; 1056 1057 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1058 if (error != 0) 1059 return (error); 1060 1061 /* 1062 * Some Linux applications (ping) define a non-NULL control data 1063 * pointer, but a msg_controllen of 0, which is not allowed in the 1064 * FreeBSD system call interface. NULL the msg_control pointer in 1065 * order to handle this case. This should be checked, but allows the 1066 * Linux ping to work. 1067 */ 1068 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) 1069 linux_msg.msg_control = PTROUT(NULL); 1070 1071 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1072 if (error != 0) 1073 return (error); 1074 1075#ifdef COMPAT_LINUX32 1076 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1077 &iov, EMSGSIZE); 1078#else 1079 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1080#endif 1081 if (error != 0) 1082 return (error); 1083 1084 control = NULL; 1085 cmsg = NULL; 1086 1087 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { 1088 error = kern_getsockname(td, s, &sa, &datalen); 1089 if (error != 0) 1090 goto bad; 1091 sa_family = sa->sa_family; 1092 free(sa, M_SONAME); 1093 1094 error = ENOBUFS; 1095 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO); 1096 control = m_get(M_WAITOK, MT_CONTROL); 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 m_freem(control); 1169 free(iov, M_IOV); 1170 if (cmsg) 1171 free(cmsg, M_LINUX); 1172 return (error); 1173} 1174 1175int 1176linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1177{ 1178 1179 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1180 args->flags)); 1181} 1182 1183int 1184linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1185{ 1186 struct l_mmsghdr *msg; 1187 l_uint retval; 1188 int error, datagrams; 1189 1190 if (args->vlen > UIO_MAXIOV) 1191 args->vlen = UIO_MAXIOV; 1192 1193 msg = PTRIN(args->msg); 1194 datagrams = 0; 1195 while (datagrams < args->vlen) { 1196 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1197 args->flags); 1198 if (error != 0) 1199 break; 1200 1201 retval = td->td_retval[0]; 1202 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1203 if (error != 0) 1204 break; 1205 ++msg; 1206 ++datagrams; 1207 } 1208 if (error == 0) 1209 td->td_retval[0] = datagrams; 1210 return (error); 1211} 1212 1213static int 1214linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1215 l_uint flags, struct msghdr *msg) 1216{ 1217 struct cmsghdr *cm; 1218 struct cmsgcred *cmcred; 1219 struct l_cmsghdr *linux_cmsg = NULL; 1220 struct l_ucred linux_ucred; 1221 socklen_t datalen, outlen; 1222 struct l_msghdr linux_msg; 1223 struct iovec *iov, *uiov; 1224 struct mbuf *control = NULL; 1225 struct mbuf **controlp; 1226 struct timeval *ftmvl; 1227 l_timeval ltmvl; 1228 caddr_t outbuf; 1229 void *data; 1230 int error, i, fd, fds, *fdp; 1231 1232 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1233 if (error != 0) 1234 return (error); 1235 1236 error = linux_to_bsd_msghdr(msg, &linux_msg); 1237 if (error != 0) 1238 return (error); 1239 1240#ifdef COMPAT_LINUX32 1241 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1242 &iov, EMSGSIZE); 1243#else 1244 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1245#endif 1246 if (error != 0) 1247 return (error); 1248 1249 if (msg->msg_name) { 1250 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name, 1251 msg->msg_namelen); 1252 if (error != 0) 1253 goto bad; 1254 } 1255 1256 uiov = msg->msg_iov; 1257 msg->msg_iov = iov; 1258 controlp = (msg->msg_control != NULL) ? &control : NULL; 1259 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp); 1260 msg->msg_iov = uiov; 1261 if (error != 0) 1262 goto bad; 1263 1264 error = bsd_to_linux_msghdr(msg, &linux_msg); 1265 if (error != 0) 1266 goto bad; 1267 1268 if (linux_msg.msg_name) { 1269 error = bsd_to_linux_sockaddr((struct sockaddr *) 1270 PTRIN(linux_msg.msg_name)); 1271 if (error != 0) 1272 goto bad; 1273 } 1274 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1275 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1276 if (error != 0) 1277 goto bad; 1278 } 1279 1280 outbuf = PTRIN(linux_msg.msg_control); 1281 outlen = 0; 1282 1283 if (control) { 1284 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1285 1286 msg->msg_control = mtod(control, struct cmsghdr *); 1287 msg->msg_controllen = control->m_len; 1288 1289 cm = CMSG_FIRSTHDR(msg); 1290 1291 while (cm != NULL) { 1292 linux_cmsg->cmsg_type = 1293 bsd_to_linux_cmsg_type(cm->cmsg_type); 1294 linux_cmsg->cmsg_level = 1295 bsd_to_linux_sockopt_level(cm->cmsg_level); 1296 if (linux_cmsg->cmsg_type == -1 1297 || cm->cmsg_level != SOL_SOCKET) 1298 { 1299 error = EINVAL; 1300 goto bad; 1301 } 1302 1303 data = CMSG_DATA(cm); 1304 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1305 1306 switch (cm->cmsg_type) 1307 { 1308 case SCM_RIGHTS: 1309 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1310 fds = datalen / sizeof(int); 1311 fdp = data; 1312 for (i = 0; i < fds; i++) { 1313 fd = *fdp++; 1314 (void)kern_fcntl(td, fd, 1315 F_SETFD, FD_CLOEXEC); 1316 } 1317 } 1318 break; 1319 1320 case SCM_CREDS: 1321 /* 1322 * Currently LOCAL_CREDS is never in 1323 * effect for Linux so no need to worry 1324 * about sockcred 1325 */ 1326 if (datalen != sizeof(*cmcred)) { 1327 error = EMSGSIZE; 1328 goto bad; 1329 } 1330 cmcred = (struct cmsgcred *)data; 1331 bzero(&linux_ucred, sizeof(linux_ucred)); 1332 linux_ucred.pid = cmcred->cmcred_pid; 1333 linux_ucred.uid = cmcred->cmcred_uid; 1334 linux_ucred.gid = cmcred->cmcred_gid; 1335 data = &linux_ucred; 1336 datalen = sizeof(linux_ucred); 1337 break; 1338 1339 case SCM_TIMESTAMP: 1340 if (datalen != sizeof(struct timeval)) { 1341 error = EMSGSIZE; 1342 goto bad; 1343 } 1344 ftmvl = (struct timeval *)data; 1345 ltmvl.tv_sec = ftmvl->tv_sec; 1346 ltmvl.tv_usec = ftmvl->tv_usec; 1347 data = <mvl; 1348 datalen = sizeof(ltmvl); 1349 break; 1350 } 1351 1352 if (outlen + LINUX_CMSG_LEN(datalen) > 1353 linux_msg.msg_controllen) { 1354 if (outlen == 0) { 1355 error = EMSGSIZE; 1356 goto bad; 1357 } else { 1358 linux_msg.msg_flags |= 1359 LINUX_MSG_CTRUNC; 1360 goto out; 1361 } 1362 } 1363 1364 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1365 1366 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1367 if (error) 1368 goto bad; 1369 outbuf += L_CMSG_HDRSZ; 1370 1371 error = copyout(data, outbuf, datalen); 1372 if (error) 1373 goto bad; 1374 1375 outbuf += LINUX_CMSG_ALIGN(datalen); 1376 outlen += LINUX_CMSG_LEN(datalen); 1377 1378 cm = CMSG_NXTHDR(msg, cm); 1379 } 1380 } 1381 1382out: 1383 linux_msg.msg_controllen = outlen; 1384 error = copyout(&linux_msg, msghdr, sizeof(linux_msg)); 1385 1386bad: 1387 free(iov, M_IOV); 1388 m_freem(control); 1389 free(linux_cmsg, M_LINUX); 1390 1391 return (error); 1392} 1393 1394int 1395linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1396{ 1397 struct msghdr bsd_msg; 1398 1399 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1400 args->flags, &bsd_msg)); 1401} 1402 1403int 1404linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1405{ 1406 struct l_mmsghdr *msg; 1407 struct msghdr bsd_msg; 1408 struct l_timespec lts; 1409 struct timespec ts, tts; 1410 l_uint retval; 1411 int error, datagrams; 1412 1413 if (args->timeout) { 1414 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1415 if (error != 0) 1416 return (error); 1417 error = linux_to_native_timespec(&ts, <s); 1418 if (error != 0) 1419 return (error); 1420 getnanotime(&tts); 1421 timespecadd(&tts, &ts); 1422 } 1423 1424 msg = PTRIN(args->msg); 1425 datagrams = 0; 1426 while (datagrams < args->vlen) { 1427 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1428 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1429 if (error != 0) 1430 break; 1431 1432 retval = td->td_retval[0]; 1433 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1434 if (error != 0) 1435 break; 1436 ++msg; 1437 ++datagrams; 1438 1439 /* 1440 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1441 */ 1442 if (args->flags & LINUX_MSG_WAITFORONE) 1443 args->flags |= LINUX_MSG_DONTWAIT; 1444 1445 /* 1446 * See BUGS section of recvmmsg(2). 1447 */ 1448 if (args->timeout) { 1449 getnanotime(&ts); 1450 timespecsub(&ts, &tts); 1451 if (!timespecisset(&ts) || ts.tv_sec > 0) 1452 break; 1453 } 1454 /* Out of band data, return right away. */ 1455 if (bsd_msg.msg_flags & MSG_OOB) 1456 break; 1457 } 1458 if (error == 0) 1459 td->td_retval[0] = datagrams; 1460 return (error); 1461} 1462 1463int 1464linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1465{ 1466 struct shutdown_args /* { 1467 int s; 1468 int how; 1469 } */ bsd_args; 1470 1471 bsd_args.s = args->s; 1472 bsd_args.how = args->how; 1473 return (sys_shutdown(td, &bsd_args)); 1474} 1475 1476int 1477linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1478{ 1479 struct setsockopt_args /* { 1480 int s; 1481 int level; 1482 int name; 1483 caddr_t val; 1484 int valsize; 1485 } */ bsd_args; 1486 l_timeval linux_tv; 1487 struct timeval tv; 1488 int error, name; 1489 1490 bsd_args.s = args->s; 1491 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1492 switch (bsd_args.level) { 1493 case SOL_SOCKET: 1494 name = linux_to_bsd_so_sockopt(args->optname); 1495 switch (name) { 1496 case SO_RCVTIMEO: 1497 /* FALLTHROUGH */ 1498 case SO_SNDTIMEO: 1499 error = copyin(PTRIN(args->optval), &linux_tv, 1500 sizeof(linux_tv)); 1501 if (error) 1502 return (error); 1503 tv.tv_sec = linux_tv.tv_sec; 1504 tv.tv_usec = linux_tv.tv_usec; 1505 return (kern_setsockopt(td, args->s, bsd_args.level, 1506 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1507 /* NOTREACHED */ 1508 break; 1509 default: 1510 break; 1511 } 1512 break; 1513 case IPPROTO_IP: 1514 name = linux_to_bsd_ip_sockopt(args->optname); 1515 break; 1516 case IPPROTO_TCP: 1517 name = linux_to_bsd_tcp_sockopt(args->optname); 1518 break; 1519 default: 1520 name = -1; 1521 break; 1522 } 1523 if (name == -1) 1524 return (ENOPROTOOPT); 1525 1526 bsd_args.name = name; 1527 bsd_args.val = PTRIN(args->optval); 1528 bsd_args.valsize = args->optlen; 1529 1530 if (name == IPV6_NEXTHOP) { 1531 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1532 bsd_args.valsize); 1533 error = sys_setsockopt(td, &bsd_args); 1534 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1535 } else 1536 error = sys_setsockopt(td, &bsd_args); 1537 1538 return (error); 1539} 1540 1541int 1542linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1543{ 1544 struct getsockopt_args /* { 1545 int s; 1546 int level; 1547 int name; 1548 caddr_t val; 1549 int *avalsize; 1550 } */ bsd_args; 1551 l_timeval linux_tv; 1552 struct timeval tv; 1553 socklen_t tv_len, xulen; 1554 struct xucred xu; 1555 struct l_ucred lxu; 1556 int error, name; 1557 1558 bsd_args.s = args->s; 1559 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1560 switch (bsd_args.level) { 1561 case SOL_SOCKET: 1562 name = linux_to_bsd_so_sockopt(args->optname); 1563 switch (name) { 1564 case SO_RCVTIMEO: 1565 /* FALLTHROUGH */ 1566 case SO_SNDTIMEO: 1567 tv_len = sizeof(tv); 1568 error = kern_getsockopt(td, args->s, bsd_args.level, 1569 name, &tv, UIO_SYSSPACE, &tv_len); 1570 if (error) 1571 return (error); 1572 linux_tv.tv_sec = tv.tv_sec; 1573 linux_tv.tv_usec = tv.tv_usec; 1574 return (copyout(&linux_tv, PTRIN(args->optval), 1575 sizeof(linux_tv))); 1576 /* NOTREACHED */ 1577 break; 1578 case LOCAL_PEERCRED: 1579 if (args->optlen != sizeof(lxu)) 1580 return (EINVAL); 1581 xulen = sizeof(xu); 1582 error = kern_getsockopt(td, args->s, bsd_args.level, 1583 name, &xu, UIO_SYSSPACE, &xulen); 1584 if (error) 1585 return (error); 1586 /* 1587 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1588 */ 1589 lxu.pid = 0; 1590 lxu.uid = xu.cr_uid; 1591 lxu.gid = xu.cr_gid; 1592 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1593 /* NOTREACHED */ 1594 break; 1595 default: 1596 break; 1597 } 1598 break; 1599 case IPPROTO_IP: 1600 name = linux_to_bsd_ip_sockopt(args->optname); 1601 break; 1602 case IPPROTO_TCP: 1603 name = linux_to_bsd_tcp_sockopt(args->optname); 1604 break; 1605 default: 1606 name = -1; 1607 break; 1608 } 1609 if (name == -1) 1610 return (EINVAL); 1611 1612 bsd_args.name = name; 1613 bsd_args.val = PTRIN(args->optval); 1614 bsd_args.avalsize = PTRIN(args->optlen); 1615 1616 if (name == IPV6_NEXTHOP) { 1617 error = sys_getsockopt(td, &bsd_args); 1618 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1619 } else 1620 error = sys_getsockopt(td, &bsd_args); 1621 1622 return (error); 1623} 1624 1625#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1626 1627/* Argument list sizes for linux_socketcall */ 1628 1629#define LINUX_AL(x) ((x) * sizeof(l_ulong)) 1630 1631static const unsigned char lxs_args[] = { 1632 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, 1633 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, 1634 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, 1635 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, 1636 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, 1637 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, 1638 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, 1639 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, 1640 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, 1641 LINUX_AL(4) /* accept4 */, LINUX_AL(5) /* recvmmsg */, 1642 LINUX_AL(4) /* sendmmsg */ 1643}; 1644 1645#define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1 1646 1647int 1648linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1649{ 1650 l_ulong a[6]; 1651 void *arg; 1652 int error; 1653 1654 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) 1655 return (EINVAL); 1656 error = copyin(PTRIN(args->args), a, lxs_args[args->what]); 1657 if (error) 1658 return (error); 1659 1660 arg = a; 1661 switch (args->what) { 1662 case LINUX_SOCKET: 1663 return (linux_socket(td, arg)); 1664 case LINUX_BIND: 1665 return (linux_bind(td, arg)); 1666 case LINUX_CONNECT: 1667 return (linux_connect(td, arg)); 1668 case LINUX_LISTEN: 1669 return (linux_listen(td, arg)); 1670 case LINUX_ACCEPT: 1671 return (linux_accept(td, arg)); 1672 case LINUX_GETSOCKNAME: 1673 return (linux_getsockname(td, arg)); 1674 case LINUX_GETPEERNAME: 1675 return (linux_getpeername(td, arg)); 1676 case LINUX_SOCKETPAIR: 1677 return (linux_socketpair(td, arg)); 1678 case LINUX_SEND: 1679 return (linux_send(td, arg)); 1680 case LINUX_RECV: 1681 return (linux_recv(td, arg)); 1682 case LINUX_SENDTO: 1683 return (linux_sendto(td, arg)); 1684 case LINUX_RECVFROM: 1685 return (linux_recvfrom(td, arg)); 1686 case LINUX_SHUTDOWN: 1687 return (linux_shutdown(td, arg)); 1688 case LINUX_SETSOCKOPT: 1689 return (linux_setsockopt(td, arg)); 1690 case LINUX_GETSOCKOPT: 1691 return (linux_getsockopt(td, arg)); 1692 case LINUX_SENDMSG: 1693 return (linux_sendmsg(td, arg)); 1694 case LINUX_RECVMSG: 1695 return (linux_recvmsg(td, arg)); 1696 case LINUX_ACCEPT4: 1697 return (linux_accept4(td, arg)); 1698 case LINUX_RECVMMSG: 1699 return (linux_recvmmsg(td, arg)); 1700 case LINUX_SENDMMSG: 1701 return (linux_sendmmsg(td, arg)); 1702 } 1703 1704 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1705 return (ENOSYS); 1706} 1707#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1708