linux_socket.c revision 300431
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 300431 2016-05-22 19:08:29Z 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_ip6_sockopt(int opt) 293{ 294 295 switch (opt) { 296 case LINUX_IPV6_NEXTHOP: 297 return (IPV6_NEXTHOP); 298 case LINUX_IPV6_UNICAST_HOPS: 299 return (IPV6_UNICAST_HOPS); 300 case LINUX_IPV6_MULTICAST_IF: 301 return (IPV6_MULTICAST_IF); 302 case LINUX_IPV6_MULTICAST_HOPS: 303 return (IPV6_MULTICAST_HOPS); 304 case LINUX_IPV6_MULTICAST_LOOP: 305 return (IPV6_MULTICAST_LOOP); 306 case LINUX_IPV6_ADD_MEMBERSHIP: 307 return (IPV6_JOIN_GROUP); 308 case LINUX_IPV6_DROP_MEMBERSHIP: 309 return (IPV6_LEAVE_GROUP); 310 case LINUX_IPV6_V6ONLY: 311 return (IPV6_V6ONLY); 312 case LINUX_IPV6_DONTFRAG: 313 return (IPV6_DONTFRAG); 314#if 0 315 case LINUX_IPV6_CHECKSUM: 316 return (IPV6_CHECKSUM); 317 case LINUX_IPV6_RECVPKTINFO: 318 return (IPV6_RECVPKTINFO); 319 case LINUX_IPV6_PKTINFO: 320 return (IPV6_PKTINFO); 321 case LINUX_IPV6_RECVHOPLIMIT: 322 return (IPV6_RECVHOPLIMIT); 323 case LINUX_IPV6_HOPLIMIT: 324 return (IPV6_HOPLIMIT); 325 case LINUX_IPV6_RECVHOPOPTS: 326 return (IPV6_RECVHOPOPTS); 327 case LINUX_IPV6_HOPOPTS: 328 return (IPV6_HOPOPTS); 329 case LINUX_IPV6_RTHDRDSTOPTS: 330 return (IPV6_RTHDRDSTOPTS); 331 case LINUX_IPV6_RECVRTHDR: 332 return (IPV6_RECVRTHDR); 333 case LINUX_IPV6_RTHDR: 334 return (IPV6_RTHDR); 335 case LINUX_IPV6_RECVDSTOPTS: 336 return (IPV6_RECVDSTOPTS); 337 case LINUX_IPV6_DSTOPTS: 338 return (IPV6_DSTOPTS); 339 case LINUX_IPV6_RECVPATHMTU: 340 return (IPV6_RECVPATHMTU); 341 case LINUX_IPV6_PATHMTU: 342 return (IPV6_PATHMTU); 343#endif 344 } 345 return (-1); 346} 347 348static int 349linux_to_bsd_so_sockopt(int opt) 350{ 351 352 switch (opt) { 353 case LINUX_SO_DEBUG: 354 return (SO_DEBUG); 355 case LINUX_SO_REUSEADDR: 356 return (SO_REUSEADDR); 357 case LINUX_SO_TYPE: 358 return (SO_TYPE); 359 case LINUX_SO_ERROR: 360 return (SO_ERROR); 361 case LINUX_SO_DONTROUTE: 362 return (SO_DONTROUTE); 363 case LINUX_SO_BROADCAST: 364 return (SO_BROADCAST); 365 case LINUX_SO_SNDBUF: 366 return (SO_SNDBUF); 367 case LINUX_SO_RCVBUF: 368 return (SO_RCVBUF); 369 case LINUX_SO_KEEPALIVE: 370 return (SO_KEEPALIVE); 371 case LINUX_SO_OOBINLINE: 372 return (SO_OOBINLINE); 373 case LINUX_SO_LINGER: 374 return (SO_LINGER); 375 case LINUX_SO_PEERCRED: 376 return (LOCAL_PEERCRED); 377 case LINUX_SO_RCVLOWAT: 378 return (SO_RCVLOWAT); 379 case LINUX_SO_SNDLOWAT: 380 return (SO_SNDLOWAT); 381 case LINUX_SO_RCVTIMEO: 382 return (SO_RCVTIMEO); 383 case LINUX_SO_SNDTIMEO: 384 return (SO_SNDTIMEO); 385 case LINUX_SO_TIMESTAMP: 386 return (SO_TIMESTAMP); 387 case LINUX_SO_ACCEPTCONN: 388 return (SO_ACCEPTCONN); 389 } 390 return (-1); 391} 392 393static int 394linux_to_bsd_tcp_sockopt(int opt) 395{ 396 397 switch (opt) { 398 case LINUX_TCP_NODELAY: 399 return (TCP_NODELAY); 400 case LINUX_TCP_MAXSEG: 401 return (TCP_MAXSEG); 402 case LINUX_TCP_KEEPIDLE: 403 return (TCP_KEEPIDLE); 404 case LINUX_TCP_KEEPINTVL: 405 return (TCP_KEEPINTVL); 406 case LINUX_TCP_KEEPCNT: 407 return (TCP_KEEPCNT); 408 case LINUX_TCP_MD5SIG: 409 return (TCP_MD5SIG); 410 } 411 return (-1); 412} 413 414static int 415linux_to_bsd_msg_flags(int flags) 416{ 417 int ret_flags = 0; 418 419 if (flags & LINUX_MSG_OOB) 420 ret_flags |= MSG_OOB; 421 if (flags & LINUX_MSG_PEEK) 422 ret_flags |= MSG_PEEK; 423 if (flags & LINUX_MSG_DONTROUTE) 424 ret_flags |= MSG_DONTROUTE; 425 if (flags & LINUX_MSG_CTRUNC) 426 ret_flags |= MSG_CTRUNC; 427 if (flags & LINUX_MSG_TRUNC) 428 ret_flags |= MSG_TRUNC; 429 if (flags & LINUX_MSG_DONTWAIT) 430 ret_flags |= MSG_DONTWAIT; 431 if (flags & LINUX_MSG_EOR) 432 ret_flags |= MSG_EOR; 433 if (flags & LINUX_MSG_WAITALL) 434 ret_flags |= MSG_WAITALL; 435 if (flags & LINUX_MSG_NOSIGNAL) 436 ret_flags |= MSG_NOSIGNAL; 437#if 0 /* not handled */ 438 if (flags & LINUX_MSG_PROXY) 439 ; 440 if (flags & LINUX_MSG_FIN) 441 ; 442 if (flags & LINUX_MSG_SYN) 443 ; 444 if (flags & LINUX_MSG_CONFIRM) 445 ; 446 if (flags & LINUX_MSG_RST) 447 ; 448 if (flags & LINUX_MSG_ERRQUEUE) 449 ; 450#endif 451 return (ret_flags); 452} 453 454/* 455* If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the 456* native syscall will fault. Thus, we don't really need to check the 457* return values for these functions. 458*/ 459 460static int 461bsd_to_linux_sockaddr(struct sockaddr *arg) 462{ 463 struct sockaddr sa; 464 size_t sa_len = sizeof(struct sockaddr); 465 int error, bdom; 466 467 if ((error = copyin(arg, &sa, sa_len))) 468 return (error); 469 470 bdom = bsd_to_linux_domain(sa.sa_family); 471 if (bdom == -1) 472 return (EAFNOSUPPORT); 473 474 *(u_short *)&sa = bdom; 475 return (copyout(&sa, arg, sa_len)); 476} 477 478static int 479linux_to_bsd_sockaddr(struct sockaddr *arg, int len) 480{ 481 struct sockaddr sa; 482 size_t sa_len = sizeof(struct sockaddr); 483 int error, bdom; 484 485 if ((error = copyin(arg, &sa, sa_len))) 486 return (error); 487 488 bdom = linux_to_bsd_domain(*(sa_family_t *)&sa); 489 if (bdom == -1) 490 return (EAFNOSUPPORT); 491 492 sa.sa_family = bdom; 493 sa.sa_len = len; 494 return (copyout(&sa, arg, sa_len)); 495} 496 497static int 498linux_sa_put(struct osockaddr *osa) 499{ 500 struct osockaddr sa; 501 int error, bdom; 502 503 /* 504 * Only read/write the osockaddr family part, the rest is 505 * not changed. 506 */ 507 error = copyin(osa, &sa, sizeof(sa.sa_family)); 508 if (error) 509 return (error); 510 511 bdom = bsd_to_linux_domain(sa.sa_family); 512 if (bdom == -1) 513 return (EINVAL); 514 515 sa.sa_family = bdom; 516 return (copyout(&sa, osa, sizeof(sa.sa_family))); 517} 518 519static int 520linux_to_bsd_cmsg_type(int cmsg_type) 521{ 522 523 switch (cmsg_type) { 524 case LINUX_SCM_RIGHTS: 525 return (SCM_RIGHTS); 526 case LINUX_SCM_CREDENTIALS: 527 return (SCM_CREDS); 528 } 529 return (-1); 530} 531 532static int 533bsd_to_linux_cmsg_type(int cmsg_type) 534{ 535 536 switch (cmsg_type) { 537 case SCM_RIGHTS: 538 return (LINUX_SCM_RIGHTS); 539 case SCM_CREDS: 540 return (LINUX_SCM_CREDENTIALS); 541 case SCM_TIMESTAMP: 542 return (LINUX_SCM_TIMESTAMP); 543 } 544 return (-1); 545} 546 547static int 548linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 549{ 550 if (lhdr->msg_controllen > INT_MAX) 551 return (ENOBUFS); 552 553 bhdr->msg_name = PTRIN(lhdr->msg_name); 554 bhdr->msg_namelen = lhdr->msg_namelen; 555 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 556 bhdr->msg_iovlen = lhdr->msg_iovlen; 557 bhdr->msg_control = PTRIN(lhdr->msg_control); 558 559 /* 560 * msg_controllen is skipped since BSD and LINUX control messages 561 * are potentially different sizes (e.g. the cred structure used 562 * by SCM_CREDS is different between the two operating system). 563 * 564 * The caller can set it (if necessary) after converting all the 565 * control messages. 566 */ 567 568 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 569 return (0); 570} 571 572static int 573bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 574{ 575 lhdr->msg_name = PTROUT(bhdr->msg_name); 576 lhdr->msg_namelen = bhdr->msg_namelen; 577 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 578 lhdr->msg_iovlen = bhdr->msg_iovlen; 579 lhdr->msg_control = PTROUT(bhdr->msg_control); 580 581 /* 582 * msg_controllen is skipped since BSD and LINUX control messages 583 * are potentially different sizes (e.g. the cred structure used 584 * by SCM_CREDS is different between the two operating system). 585 * 586 * The caller can set it (if necessary) after converting all the 587 * control messages. 588 */ 589 590 /* msg_flags skipped */ 591 return (0); 592} 593 594static int 595linux_set_socket_flags(int lflags, int *flags) 596{ 597 598 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 599 return (EINVAL); 600 if (lflags & LINUX_SOCK_NONBLOCK) 601 *flags |= SOCK_NONBLOCK; 602 if (lflags & LINUX_SOCK_CLOEXEC) 603 *flags |= SOCK_CLOEXEC; 604 return (0); 605} 606 607static int 608linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 609 struct mbuf *control, enum uio_seg segflg) 610{ 611 struct sockaddr *to; 612 int error; 613 614 if (mp->msg_name != NULL) { 615 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); 616 if (error) 617 return (error); 618 mp->msg_name = to; 619 } else 620 to = NULL; 621 622 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 623 segflg); 624 625 if (to) 626 free(to, M_SONAME); 627 return (error); 628} 629 630/* Return 0 if IP_HDRINCL is set for the given socket. */ 631static int 632linux_check_hdrincl(struct thread *td, int s) 633{ 634 int error, optval; 635 socklen_t size_val; 636 637 size_val = sizeof(optval); 638 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 639 &optval, UIO_SYSSPACE, &size_val); 640 if (error) 641 return (error); 642 643 return (optval == 0); 644} 645 646/* 647 * Updated sendto() when IP_HDRINCL is set: 648 * tweak endian-dependent fields in the IP packet. 649 */ 650static int 651linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 652{ 653/* 654 * linux_ip_copysize defines how many bytes we should copy 655 * from the beginning of the IP packet before we customize it for BSD. 656 * It should include all the fields we modify (ip_len and ip_off). 657 */ 658#define linux_ip_copysize 8 659 660 struct ip *packet; 661 struct msghdr msg; 662 struct iovec aiov[1]; 663 int error; 664 665 /* Check that the packet isn't too big or too small. */ 666 if (linux_args->len < linux_ip_copysize || 667 linux_args->len > IP_MAXPACKET) 668 return (EINVAL); 669 670 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK); 671 672 /* Make kernel copy of the packet to be sent */ 673 if ((error = copyin(PTRIN(linux_args->msg), packet, 674 linux_args->len))) 675 goto goout; 676 677 /* Convert fields from Linux to BSD raw IP socket format */ 678 packet->ip_len = linux_args->len; 679 packet->ip_off = ntohs(packet->ip_off); 680 681 /* Prepare the msghdr and iovec structures describing the new packet */ 682 msg.msg_name = PTRIN(linux_args->to); 683 msg.msg_namelen = linux_args->tolen; 684 msg.msg_iov = aiov; 685 msg.msg_iovlen = 1; 686 msg.msg_control = NULL; 687 msg.msg_flags = 0; 688 aiov[0].iov_base = (char *)packet; 689 aiov[0].iov_len = linux_args->len; 690 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 691 NULL, UIO_SYSSPACE); 692goout: 693 free(packet, M_LINUX); 694 return (error); 695} 696 697int 698linux_socket(struct thread *td, struct linux_socket_args *args) 699{ 700 struct socket_args /* { 701 int domain; 702 int type; 703 int protocol; 704 } */ bsd_args; 705 int retval_socket; 706 707 bsd_args.protocol = args->protocol; 708 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 709 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 710 return (EINVAL); 711 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 712 &bsd_args.type); 713 if (retval_socket != 0) 714 return (retval_socket); 715 bsd_args.domain = linux_to_bsd_domain(args->domain); 716 if (bsd_args.domain == -1) 717 return (EAFNOSUPPORT); 718 719 retval_socket = sys_socket(td, &bsd_args); 720 if (retval_socket) 721 return (retval_socket); 722 723 if (bsd_args.type == SOCK_RAW 724 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) 725 && bsd_args.domain == PF_INET) { 726 /* It's a raw IP socket: set the IP_HDRINCL option. */ 727 int hdrincl; 728 729 hdrincl = 1; 730 /* We ignore any error returned by kern_setsockopt() */ 731 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 732 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 733 } 734#ifdef INET6 735 /* 736 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 737 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 738 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 739 * sysctl value. 740 */ 741 if (bsd_args.domain == PF_INET6) { 742 int v6only; 743 744 v6only = 0; 745 /* We ignore any error returned by setsockopt() */ 746 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 747 &v6only, UIO_SYSSPACE, sizeof(v6only)); 748 } 749#endif 750 751 return (retval_socket); 752} 753 754int 755linux_bind(struct thread *td, struct linux_bind_args *args) 756{ 757 struct sockaddr *sa; 758 int error; 759 760 error = linux_getsockaddr(&sa, PTRIN(args->name), 761 args->namelen); 762 if (error) 763 return (error); 764 765 error = kern_bindat(td, AT_FDCWD, args->s, sa); 766 free(sa, M_SONAME); 767 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 768 return (EINVAL); 769 return (error); 770} 771 772int 773linux_connect(struct thread *td, struct linux_connect_args *args) 774{ 775 cap_rights_t rights; 776 struct socket *so; 777 struct sockaddr *sa; 778 u_int fflag; 779 int error; 780 781 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), 782 args->namelen); 783 if (error) 784 return (error); 785 786 error = kern_connectat(td, AT_FDCWD, args->s, sa); 787 free(sa, M_SONAME); 788 if (error != EISCONN) 789 return (error); 790 791 /* 792 * Linux doesn't return EISCONN the first time it occurs, 793 * when on a non-blocking socket. Instead it returns the 794 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 795 * 796 * XXXRW: Instead of using fgetsock(), check that it is a 797 * socket and use the file descriptor reference instead of 798 * creating a new one. 799 */ 800 error = fgetsock(td, args->s, cap_rights_init(&rights, CAP_CONNECT), 801 &so, &fflag); 802 if (error == 0) { 803 error = EISCONN; 804 if (fflag & FNONBLOCK) { 805 SOCK_LOCK(so); 806 if (so->so_emuldata == 0) 807 error = so->so_error; 808 so->so_emuldata = (void *)1; 809 SOCK_UNLOCK(so); 810 } 811 fputsock(so); 812 } 813 return (error); 814} 815 816int 817linux_listen(struct thread *td, struct linux_listen_args *args) 818{ 819 struct listen_args /* { 820 int s; 821 int backlog; 822 } */ bsd_args; 823 824 bsd_args.s = args->s; 825 bsd_args.backlog = args->backlog; 826 return (sys_listen(td, &bsd_args)); 827} 828 829static int 830linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 831 l_uintptr_t namelen, int flags) 832{ 833 struct accept4_args /* { 834 int s; 835 struct sockaddr * __restrict name; 836 socklen_t * __restrict anamelen; 837 int flags; 838 } */ bsd_args; 839 cap_rights_t rights; 840 struct socket *so; 841 struct file *fp; 842 int error, error1; 843 844 bsd_args.s = s; 845 /* XXX: */ 846 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); 847 bsd_args.anamelen = PTRIN(namelen);/* XXX */ 848 bsd_args.flags = 0; 849 error = linux_set_socket_flags(flags, &bsd_args.flags); 850 if (error != 0) 851 return (error); 852 error = sys_accept4(td, &bsd_args); 853 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); 854 if (error) { 855 if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) 856 return (EINVAL); 857 if (error == EINVAL) { 858 error1 = getsock_cap(td, s, &rights, &fp, NULL); 859 if (error1 != 0) 860 return (error1); 861 so = fp->f_data; 862 if (so->so_type == SOCK_DGRAM) { 863 fdrop(fp, td); 864 return (EOPNOTSUPP); 865 } 866 fdrop(fp, td); 867 } 868 return (error); 869 } 870 if (addr) 871 error = linux_sa_put(PTRIN(addr)); 872 if (error) { 873 (void)kern_close(td, td->td_retval[0]); 874 td->td_retval[0] = 0; 875 } 876 return (error); 877} 878 879int 880linux_accept(struct thread *td, struct linux_accept_args *args) 881{ 882 883 return (linux_accept_common(td, args->s, args->addr, 884 args->namelen, 0)); 885} 886 887int 888linux_accept4(struct thread *td, struct linux_accept4_args *args) 889{ 890 891 return (linux_accept_common(td, args->s, args->addr, 892 args->namelen, args->flags)); 893} 894 895int 896linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 897{ 898 struct getsockname_args /* { 899 int fdes; 900 struct sockaddr * __restrict asa; 901 socklen_t * __restrict alen; 902 } */ bsd_args; 903 int error; 904 905 bsd_args.fdes = args->s; 906 /* XXX: */ 907 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); 908 bsd_args.alen = PTRIN(args->namelen); /* XXX */ 909 error = sys_getsockname(td, &bsd_args); 910 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 911 if (error) 912 return (error); 913 return (linux_sa_put(PTRIN(args->addr))); 914} 915 916int 917linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 918{ 919 struct getpeername_args /* { 920 int fdes; 921 caddr_t asa; 922 int *alen; 923 } */ bsd_args; 924 int error; 925 926 bsd_args.fdes = args->s; 927 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); 928 bsd_args.alen = (socklen_t *)PTRIN(args->namelen); 929 error = sys_getpeername(td, &bsd_args); 930 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 931 if (error) 932 return (error); 933 return (linux_sa_put(PTRIN(args->addr))); 934} 935 936int 937linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 938{ 939 struct socketpair_args /* { 940 int domain; 941 int type; 942 int protocol; 943 int *rsv; 944 } */ bsd_args; 945 int error; 946 947 bsd_args.domain = linux_to_bsd_domain(args->domain); 948 if (bsd_args.domain != PF_LOCAL) 949 return (EAFNOSUPPORT); 950 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 951 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 952 return (EINVAL); 953 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 954 &bsd_args.type); 955 if (error != 0) 956 return (error); 957 if (args->protocol != 0 && args->protocol != PF_UNIX) 958 959 /* 960 * Use of PF_UNIX as protocol argument is not right, 961 * but Linux does it. 962 * Do not map PF_UNIX as its Linux value is identical 963 * to FreeBSD one. 964 */ 965 return (EPROTONOSUPPORT); 966 else 967 bsd_args.protocol = 0; 968 bsd_args.rsv = (int *)PTRIN(args->rsv); 969 return (sys_socketpair(td, &bsd_args)); 970} 971 972#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 973struct linux_send_args { 974 int s; 975 l_uintptr_t msg; 976 int len; 977 int flags; 978}; 979 980static int 981linux_send(struct thread *td, struct linux_send_args *args) 982{ 983 struct sendto_args /* { 984 int s; 985 caddr_t buf; 986 int len; 987 int flags; 988 caddr_t to; 989 int tolen; 990 } */ bsd_args; 991 992 bsd_args.s = args->s; 993 bsd_args.buf = (caddr_t)PTRIN(args->msg); 994 bsd_args.len = args->len; 995 bsd_args.flags = args->flags; 996 bsd_args.to = NULL; 997 bsd_args.tolen = 0; 998 return (sys_sendto(td, &bsd_args)); 999} 1000 1001struct linux_recv_args { 1002 int s; 1003 l_uintptr_t msg; 1004 int len; 1005 int flags; 1006}; 1007 1008static int 1009linux_recv(struct thread *td, struct linux_recv_args *args) 1010{ 1011 struct recvfrom_args /* { 1012 int s; 1013 caddr_t buf; 1014 int len; 1015 int flags; 1016 struct sockaddr *from; 1017 socklen_t fromlenaddr; 1018 } */ bsd_args; 1019 1020 bsd_args.s = args->s; 1021 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1022 bsd_args.len = args->len; 1023 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1024 bsd_args.from = NULL; 1025 bsd_args.fromlenaddr = 0; 1026 return (sys_recvfrom(td, &bsd_args)); 1027} 1028#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1029 1030int 1031linux_sendto(struct thread *td, struct linux_sendto_args *args) 1032{ 1033 struct msghdr msg; 1034 struct iovec aiov; 1035 1036 if (linux_check_hdrincl(td, args->s) == 0) 1037 /* IP_HDRINCL set, tweak the packet before sending */ 1038 return (linux_sendto_hdrincl(td, args)); 1039 1040 msg.msg_name = PTRIN(args->to); 1041 msg.msg_namelen = args->tolen; 1042 msg.msg_iov = &aiov; 1043 msg.msg_iovlen = 1; 1044 msg.msg_control = NULL; 1045 msg.msg_flags = 0; 1046 aiov.iov_base = PTRIN(args->msg); 1047 aiov.iov_len = args->len; 1048 return (linux_sendit(td, args->s, &msg, args->flags, NULL, 1049 UIO_USERSPACE)); 1050} 1051 1052int 1053linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1054{ 1055 struct msghdr msg; 1056 struct iovec aiov; 1057 int error; 1058 1059 if (PTRIN(args->fromlen) != NULL) { 1060 error = copyin(PTRIN(args->fromlen), &msg.msg_namelen, 1061 sizeof(msg.msg_namelen)); 1062 if (error != 0) 1063 return (error); 1064 1065 error = linux_to_bsd_sockaddr((struct sockaddr *)PTRIN(args->from), 1066 msg.msg_namelen); 1067 if (error != 0) 1068 return (error); 1069 } else 1070 msg.msg_namelen = 0; 1071 1072 msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from); 1073 msg.msg_iov = &aiov; 1074 msg.msg_iovlen = 1; 1075 aiov.iov_base = PTRIN(args->buf); 1076 aiov.iov_len = args->len; 1077 msg.msg_control = 0; 1078 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1079 1080 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL); 1081 if (error != 0) 1082 return (error); 1083 1084 if (PTRIN(args->from) != NULL) { 1085 error = bsd_to_linux_sockaddr((struct sockaddr *) 1086 PTRIN(args->from)); 1087 if (error != 0) 1088 return (error); 1089 1090 error = linux_sa_put((struct osockaddr *) 1091 PTRIN(args->from)); 1092 } 1093 1094 if (PTRIN(args->fromlen) != NULL) 1095 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1096 sizeof(msg.msg_namelen)); 1097 1098 return (error); 1099} 1100 1101static int 1102linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1103 l_uint flags) 1104{ 1105 struct cmsghdr *cmsg; 1106 struct cmsgcred cmcred; 1107 struct mbuf *control; 1108 struct msghdr msg; 1109 struct l_cmsghdr linux_cmsg; 1110 struct l_cmsghdr *ptr_cmsg; 1111 struct l_msghdr linux_msg; 1112 struct iovec *iov; 1113 socklen_t datalen; 1114 struct sockaddr *sa; 1115 sa_family_t sa_family; 1116 void *data; 1117 int error; 1118 1119 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1120 if (error != 0) 1121 return (error); 1122 1123 /* 1124 * Some Linux applications (ping) define a non-NULL control data 1125 * pointer, but a msg_controllen of 0, which is not allowed in the 1126 * FreeBSD system call interface. NULL the msg_control pointer in 1127 * order to handle this case. This should be checked, but allows the 1128 * Linux ping to work. 1129 */ 1130 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) 1131 linux_msg.msg_control = PTROUT(NULL); 1132 1133 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1134 if (error != 0) 1135 return (error); 1136 1137#ifdef COMPAT_LINUX32 1138 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1139 &iov, EMSGSIZE); 1140#else 1141 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1142#endif 1143 if (error != 0) 1144 return (error); 1145 1146 control = NULL; 1147 cmsg = NULL; 1148 1149 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { 1150 error = kern_getsockname(td, s, &sa, &datalen); 1151 if (error != 0) 1152 goto bad; 1153 sa_family = sa->sa_family; 1154 free(sa, M_SONAME); 1155 1156 error = ENOBUFS; 1157 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO); 1158 control = m_get(M_WAITOK, MT_CONTROL); 1159 1160 do { 1161 error = copyin(ptr_cmsg, &linux_cmsg, 1162 sizeof(struct l_cmsghdr)); 1163 if (error != 0) 1164 goto bad; 1165 1166 error = EINVAL; 1167 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) 1168 goto bad; 1169 1170 /* 1171 * Now we support only SCM_RIGHTS and SCM_CRED, 1172 * so return EINVAL in any other cmsg_type 1173 */ 1174 cmsg->cmsg_type = 1175 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1176 cmsg->cmsg_level = 1177 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1178 if (cmsg->cmsg_type == -1 1179 || cmsg->cmsg_level != SOL_SOCKET) 1180 goto bad; 1181 1182 /* 1183 * Some applications (e.g. pulseaudio) attempt to 1184 * send ancillary data even if the underlying protocol 1185 * doesn't support it which is not allowed in the 1186 * FreeBSD system call interface. 1187 */ 1188 if (sa_family != AF_UNIX) 1189 continue; 1190 1191 data = LINUX_CMSG_DATA(ptr_cmsg); 1192 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1193 1194 switch (cmsg->cmsg_type) 1195 { 1196 case SCM_RIGHTS: 1197 break; 1198 1199 case SCM_CREDS: 1200 data = &cmcred; 1201 datalen = sizeof(cmcred); 1202 1203 /* 1204 * The lower levels will fill in the structure 1205 */ 1206 bzero(data, datalen); 1207 break; 1208 } 1209 1210 cmsg->cmsg_len = CMSG_LEN(datalen); 1211 1212 error = ENOBUFS; 1213 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg)) 1214 goto bad; 1215 if (!m_append(control, datalen, (c_caddr_t)data)) 1216 goto bad; 1217 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); 1218 1219 if (m_length(control, NULL) == 0) { 1220 m_freem(control); 1221 control = NULL; 1222 } 1223 } 1224 1225 msg.msg_iov = iov; 1226 msg.msg_flags = 0; 1227 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1228 control = NULL; 1229 1230bad: 1231 m_freem(control); 1232 free(iov, M_IOV); 1233 if (cmsg) 1234 free(cmsg, M_LINUX); 1235 return (error); 1236} 1237 1238int 1239linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1240{ 1241 1242 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1243 args->flags)); 1244} 1245 1246int 1247linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1248{ 1249 struct l_mmsghdr *msg; 1250 l_uint retval; 1251 int error, datagrams; 1252 1253 if (args->vlen > UIO_MAXIOV) 1254 args->vlen = UIO_MAXIOV; 1255 1256 msg = PTRIN(args->msg); 1257 datagrams = 0; 1258 while (datagrams < args->vlen) { 1259 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1260 args->flags); 1261 if (error != 0) 1262 break; 1263 1264 retval = td->td_retval[0]; 1265 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1266 if (error != 0) 1267 break; 1268 ++msg; 1269 ++datagrams; 1270 } 1271 if (error == 0) 1272 td->td_retval[0] = datagrams; 1273 return (error); 1274} 1275 1276static int 1277linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1278 l_uint flags, struct msghdr *msg) 1279{ 1280 struct cmsghdr *cm; 1281 struct cmsgcred *cmcred; 1282 struct l_cmsghdr *linux_cmsg = NULL; 1283 struct l_ucred linux_ucred; 1284 socklen_t datalen, outlen; 1285 struct l_msghdr linux_msg; 1286 struct iovec *iov, *uiov; 1287 struct mbuf *control = NULL; 1288 struct mbuf **controlp; 1289 struct timeval *ftmvl; 1290 l_timeval ltmvl; 1291 caddr_t outbuf; 1292 void *data; 1293 int error, i, fd, fds, *fdp; 1294 1295 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1296 if (error != 0) 1297 return (error); 1298 1299 error = linux_to_bsd_msghdr(msg, &linux_msg); 1300 if (error != 0) 1301 return (error); 1302 1303#ifdef COMPAT_LINUX32 1304 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1305 &iov, EMSGSIZE); 1306#else 1307 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1308#endif 1309 if (error != 0) 1310 return (error); 1311 1312 if (msg->msg_name) { 1313 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name, 1314 msg->msg_namelen); 1315 if (error != 0) 1316 goto bad; 1317 } 1318 1319 uiov = msg->msg_iov; 1320 msg->msg_iov = iov; 1321 controlp = (msg->msg_control != NULL) ? &control : NULL; 1322 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp); 1323 msg->msg_iov = uiov; 1324 if (error != 0) 1325 goto bad; 1326 1327 error = bsd_to_linux_msghdr(msg, &linux_msg); 1328 if (error != 0) 1329 goto bad; 1330 1331 if (linux_msg.msg_name) { 1332 error = bsd_to_linux_sockaddr((struct sockaddr *) 1333 PTRIN(linux_msg.msg_name)); 1334 if (error != 0) 1335 goto bad; 1336 } 1337 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1338 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1339 if (error != 0) 1340 goto bad; 1341 } 1342 1343 outbuf = PTRIN(linux_msg.msg_control); 1344 outlen = 0; 1345 1346 if (control) { 1347 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1348 1349 msg->msg_control = mtod(control, struct cmsghdr *); 1350 msg->msg_controllen = control->m_len; 1351 1352 cm = CMSG_FIRSTHDR(msg); 1353 1354 while (cm != NULL) { 1355 linux_cmsg->cmsg_type = 1356 bsd_to_linux_cmsg_type(cm->cmsg_type); 1357 linux_cmsg->cmsg_level = 1358 bsd_to_linux_sockopt_level(cm->cmsg_level); 1359 if (linux_cmsg->cmsg_type == -1 1360 || cm->cmsg_level != SOL_SOCKET) 1361 { 1362 error = EINVAL; 1363 goto bad; 1364 } 1365 1366 data = CMSG_DATA(cm); 1367 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1368 1369 switch (cm->cmsg_type) 1370 { 1371 case SCM_RIGHTS: 1372 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1373 fds = datalen / sizeof(int); 1374 fdp = data; 1375 for (i = 0; i < fds; i++) { 1376 fd = *fdp++; 1377 (void)kern_fcntl(td, fd, 1378 F_SETFD, FD_CLOEXEC); 1379 } 1380 } 1381 break; 1382 1383 case SCM_CREDS: 1384 /* 1385 * Currently LOCAL_CREDS is never in 1386 * effect for Linux so no need to worry 1387 * about sockcred 1388 */ 1389 if (datalen != sizeof(*cmcred)) { 1390 error = EMSGSIZE; 1391 goto bad; 1392 } 1393 cmcred = (struct cmsgcred *)data; 1394 bzero(&linux_ucred, sizeof(linux_ucred)); 1395 linux_ucred.pid = cmcred->cmcred_pid; 1396 linux_ucred.uid = cmcred->cmcred_uid; 1397 linux_ucred.gid = cmcred->cmcred_gid; 1398 data = &linux_ucred; 1399 datalen = sizeof(linux_ucred); 1400 break; 1401 1402 case SCM_TIMESTAMP: 1403 if (datalen != sizeof(struct timeval)) { 1404 error = EMSGSIZE; 1405 goto bad; 1406 } 1407 ftmvl = (struct timeval *)data; 1408 ltmvl.tv_sec = ftmvl->tv_sec; 1409 ltmvl.tv_usec = ftmvl->tv_usec; 1410 data = <mvl; 1411 datalen = sizeof(ltmvl); 1412 break; 1413 } 1414 1415 if (outlen + LINUX_CMSG_LEN(datalen) > 1416 linux_msg.msg_controllen) { 1417 if (outlen == 0) { 1418 error = EMSGSIZE; 1419 goto bad; 1420 } else { 1421 linux_msg.msg_flags |= 1422 LINUX_MSG_CTRUNC; 1423 goto out; 1424 } 1425 } 1426 1427 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1428 1429 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1430 if (error) 1431 goto bad; 1432 outbuf += L_CMSG_HDRSZ; 1433 1434 error = copyout(data, outbuf, datalen); 1435 if (error) 1436 goto bad; 1437 1438 outbuf += LINUX_CMSG_ALIGN(datalen); 1439 outlen += LINUX_CMSG_LEN(datalen); 1440 1441 cm = CMSG_NXTHDR(msg, cm); 1442 } 1443 } 1444 1445out: 1446 linux_msg.msg_controllen = outlen; 1447 error = copyout(&linux_msg, msghdr, sizeof(linux_msg)); 1448 1449bad: 1450 free(iov, M_IOV); 1451 m_freem(control); 1452 free(linux_cmsg, M_LINUX); 1453 1454 return (error); 1455} 1456 1457int 1458linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1459{ 1460 struct msghdr bsd_msg; 1461 1462 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1463 args->flags, &bsd_msg)); 1464} 1465 1466int 1467linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1468{ 1469 struct l_mmsghdr *msg; 1470 struct msghdr bsd_msg; 1471 struct l_timespec lts; 1472 struct timespec ts, tts; 1473 l_uint retval; 1474 int error, datagrams; 1475 1476 if (args->timeout) { 1477 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1478 if (error != 0) 1479 return (error); 1480 error = linux_to_native_timespec(&ts, <s); 1481 if (error != 0) 1482 return (error); 1483 getnanotime(&tts); 1484 timespecadd(&tts, &ts); 1485 } 1486 1487 msg = PTRIN(args->msg); 1488 datagrams = 0; 1489 while (datagrams < args->vlen) { 1490 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1491 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1492 if (error != 0) 1493 break; 1494 1495 retval = td->td_retval[0]; 1496 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1497 if (error != 0) 1498 break; 1499 ++msg; 1500 ++datagrams; 1501 1502 /* 1503 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1504 */ 1505 if (args->flags & LINUX_MSG_WAITFORONE) 1506 args->flags |= LINUX_MSG_DONTWAIT; 1507 1508 /* 1509 * See BUGS section of recvmmsg(2). 1510 */ 1511 if (args->timeout) { 1512 getnanotime(&ts); 1513 timespecsub(&ts, &tts); 1514 if (!timespecisset(&ts) || ts.tv_sec > 0) 1515 break; 1516 } 1517 /* Out of band data, return right away. */ 1518 if (bsd_msg.msg_flags & MSG_OOB) 1519 break; 1520 } 1521 if (error == 0) 1522 td->td_retval[0] = datagrams; 1523 return (error); 1524} 1525 1526int 1527linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1528{ 1529 struct shutdown_args /* { 1530 int s; 1531 int how; 1532 } */ bsd_args; 1533 1534 bsd_args.s = args->s; 1535 bsd_args.how = args->how; 1536 return (sys_shutdown(td, &bsd_args)); 1537} 1538 1539int 1540linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1541{ 1542 struct setsockopt_args /* { 1543 int s; 1544 int level; 1545 int name; 1546 caddr_t val; 1547 int valsize; 1548 } */ bsd_args; 1549 l_timeval linux_tv; 1550 struct timeval tv; 1551 int error, name; 1552 1553 bsd_args.s = args->s; 1554 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1555 switch (bsd_args.level) { 1556 case SOL_SOCKET: 1557 name = linux_to_bsd_so_sockopt(args->optname); 1558 switch (name) { 1559 case SO_RCVTIMEO: 1560 /* FALLTHROUGH */ 1561 case SO_SNDTIMEO: 1562 error = copyin(PTRIN(args->optval), &linux_tv, 1563 sizeof(linux_tv)); 1564 if (error) 1565 return (error); 1566 tv.tv_sec = linux_tv.tv_sec; 1567 tv.tv_usec = linux_tv.tv_usec; 1568 return (kern_setsockopt(td, args->s, bsd_args.level, 1569 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1570 /* NOTREACHED */ 1571 break; 1572 default: 1573 break; 1574 } 1575 break; 1576 case IPPROTO_IP: 1577 name = linux_to_bsd_ip_sockopt(args->optname); 1578 break; 1579 case IPPROTO_IPV6: 1580 name = linux_to_bsd_ip6_sockopt(args->optname); 1581 break; 1582 case IPPROTO_TCP: 1583 name = linux_to_bsd_tcp_sockopt(args->optname); 1584 break; 1585 default: 1586 name = -1; 1587 break; 1588 } 1589 if (name == -1) 1590 return (ENOPROTOOPT); 1591 1592 bsd_args.name = name; 1593 bsd_args.val = PTRIN(args->optval); 1594 bsd_args.valsize = args->optlen; 1595 1596 if (name == IPV6_NEXTHOP) { 1597 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1598 bsd_args.valsize); 1599 error = sys_setsockopt(td, &bsd_args); 1600 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1601 } else 1602 error = sys_setsockopt(td, &bsd_args); 1603 1604 return (error); 1605} 1606 1607int 1608linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1609{ 1610 struct getsockopt_args /* { 1611 int s; 1612 int level; 1613 int name; 1614 caddr_t val; 1615 int *avalsize; 1616 } */ bsd_args; 1617 l_timeval linux_tv; 1618 struct timeval tv; 1619 socklen_t tv_len, xulen, len; 1620 struct xucred xu; 1621 struct l_ucred lxu; 1622 int error, name, newval; 1623 1624 bsd_args.s = args->s; 1625 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1626 switch (bsd_args.level) { 1627 case SOL_SOCKET: 1628 name = linux_to_bsd_so_sockopt(args->optname); 1629 switch (name) { 1630 case SO_RCVTIMEO: 1631 /* FALLTHROUGH */ 1632 case SO_SNDTIMEO: 1633 tv_len = sizeof(tv); 1634 error = kern_getsockopt(td, args->s, bsd_args.level, 1635 name, &tv, UIO_SYSSPACE, &tv_len); 1636 if (error) 1637 return (error); 1638 linux_tv.tv_sec = tv.tv_sec; 1639 linux_tv.tv_usec = tv.tv_usec; 1640 return (copyout(&linux_tv, PTRIN(args->optval), 1641 sizeof(linux_tv))); 1642 /* NOTREACHED */ 1643 break; 1644 case LOCAL_PEERCRED: 1645 if (args->optlen != sizeof(lxu)) 1646 return (EINVAL); 1647 xulen = sizeof(xu); 1648 error = kern_getsockopt(td, args->s, bsd_args.level, 1649 name, &xu, UIO_SYSSPACE, &xulen); 1650 if (error) 1651 return (error); 1652 /* 1653 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1654 */ 1655 lxu.pid = 0; 1656 lxu.uid = xu.cr_uid; 1657 lxu.gid = xu.cr_gid; 1658 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1659 /* NOTREACHED */ 1660 break; 1661 case SO_ERROR: 1662 len = sizeof(newval); 1663 error = kern_getsockopt(td, args->s, bsd_args.level, 1664 name, &newval, UIO_SYSSPACE, &len); 1665 if (error) 1666 return (error); 1667 newval = -SV_ABI_ERRNO(td->td_proc, newval); 1668 return (copyout(&newval, PTRIN(args->optval), len)); 1669 /* NOTREACHED */ 1670 default: 1671 break; 1672 } 1673 break; 1674 case IPPROTO_IP: 1675 name = linux_to_bsd_ip_sockopt(args->optname); 1676 break; 1677 case IPPROTO_IPV6: 1678 name = linux_to_bsd_ip6_sockopt(args->optname); 1679 break; 1680 case IPPROTO_TCP: 1681 name = linux_to_bsd_tcp_sockopt(args->optname); 1682 break; 1683 default: 1684 name = -1; 1685 break; 1686 } 1687 if (name == -1) 1688 return (EINVAL); 1689 1690 bsd_args.name = name; 1691 bsd_args.val = PTRIN(args->optval); 1692 bsd_args.avalsize = PTRIN(args->optlen); 1693 1694 if (name == IPV6_NEXTHOP) { 1695 error = sys_getsockopt(td, &bsd_args); 1696 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1697 } else 1698 error = sys_getsockopt(td, &bsd_args); 1699 1700 return (error); 1701} 1702 1703#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1704 1705/* Argument list sizes for linux_socketcall */ 1706 1707#define LINUX_AL(x) ((x) * sizeof(l_ulong)) 1708 1709static const unsigned char lxs_args[] = { 1710 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, 1711 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, 1712 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, 1713 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, 1714 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, 1715 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, 1716 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, 1717 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, 1718 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, 1719 LINUX_AL(4) /* accept4 */, LINUX_AL(5) /* recvmmsg */, 1720 LINUX_AL(4) /* sendmmsg */ 1721}; 1722 1723#define LINUX_AL_SIZE (nitems(lxs_args) - 1) 1724 1725int 1726linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1727{ 1728 l_ulong a[6]; 1729 void *arg; 1730 int error; 1731 1732 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) 1733 return (EINVAL); 1734 error = copyin(PTRIN(args->args), a, lxs_args[args->what]); 1735 if (error) 1736 return (error); 1737 1738 arg = a; 1739 switch (args->what) { 1740 case LINUX_SOCKET: 1741 return (linux_socket(td, arg)); 1742 case LINUX_BIND: 1743 return (linux_bind(td, arg)); 1744 case LINUX_CONNECT: 1745 return (linux_connect(td, arg)); 1746 case LINUX_LISTEN: 1747 return (linux_listen(td, arg)); 1748 case LINUX_ACCEPT: 1749 return (linux_accept(td, arg)); 1750 case LINUX_GETSOCKNAME: 1751 return (linux_getsockname(td, arg)); 1752 case LINUX_GETPEERNAME: 1753 return (linux_getpeername(td, arg)); 1754 case LINUX_SOCKETPAIR: 1755 return (linux_socketpair(td, arg)); 1756 case LINUX_SEND: 1757 return (linux_send(td, arg)); 1758 case LINUX_RECV: 1759 return (linux_recv(td, arg)); 1760 case LINUX_SENDTO: 1761 return (linux_sendto(td, arg)); 1762 case LINUX_RECVFROM: 1763 return (linux_recvfrom(td, arg)); 1764 case LINUX_SHUTDOWN: 1765 return (linux_shutdown(td, arg)); 1766 case LINUX_SETSOCKOPT: 1767 return (linux_setsockopt(td, arg)); 1768 case LINUX_GETSOCKOPT: 1769 return (linux_getsockopt(td, arg)); 1770 case LINUX_SENDMSG: 1771 return (linux_sendmsg(td, arg)); 1772 case LINUX_RECVMSG: 1773 return (linux_recvmsg(td, arg)); 1774 case LINUX_ACCEPT4: 1775 return (linux_accept4(td, arg)); 1776 case LINUX_RECVMMSG: 1777 return (linux_recvmmsg(td, arg)); 1778 case LINUX_SENDMMSG: 1779 return (linux_sendmmsg(td, arg)); 1780 } 1781 1782 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1783 return (ENOSYS); 1784} 1785#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1786