linux_socket.c revision 297303
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: stable/10/sys/compat/linux/linux_socket.c 297303 2016-03-27 06:43:05Z 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 <netinet/in.h> 57#include <netinet/in_systm.h> 58#include <netinet/ip.h> 59#include <netinet/tcp.h> 60#ifdef INET6 61#include <netinet/ip6.h> 62#include <netinet6/ip6_var.h> 63#include <netinet6/in6_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; 466 467 if ((error = copyin(arg, &sa, sa_len))) 468 return (error); 469 470 *(u_short *)&sa = sa.sa_family; 471 472 error = copyout(&sa, arg, sa_len); 473 474 return (error); 475} 476 477static int 478linux_to_bsd_sockaddr(struct sockaddr *arg, int len) 479{ 480 struct sockaddr sa; 481 size_t sa_len = sizeof(struct sockaddr); 482 int error; 483 484 if ((error = copyin(arg, &sa, sa_len))) 485 return (error); 486 487 sa.sa_family = *(sa_family_t *)&sa; 488 sa.sa_len = len; 489 490 error = copyout(&sa, arg, sa_len); 491 492 return (error); 493} 494 495static int 496linux_sa_put(struct osockaddr *osa) 497{ 498 struct osockaddr sa; 499 int error, bdom; 500 501 /* 502 * Only read/write the osockaddr family part, the rest is 503 * not changed. 504 */ 505 error = copyin(osa, &sa, sizeof(sa.sa_family)); 506 if (error) 507 return (error); 508 509 bdom = bsd_to_linux_domain(sa.sa_family); 510 if (bdom == -1) 511 return (EINVAL); 512 513 sa.sa_family = bdom; 514 error = copyout(&sa, osa, sizeof(sa.sa_family)); 515 if (error) 516 return (error); 517 518 return (0); 519} 520 521static int 522linux_to_bsd_cmsg_type(int cmsg_type) 523{ 524 525 switch (cmsg_type) { 526 case LINUX_SCM_RIGHTS: 527 return (SCM_RIGHTS); 528 case LINUX_SCM_CREDENTIALS: 529 return (SCM_CREDS); 530 } 531 return (-1); 532} 533 534static int 535bsd_to_linux_cmsg_type(int cmsg_type) 536{ 537 538 switch (cmsg_type) { 539 case SCM_RIGHTS: 540 return (LINUX_SCM_RIGHTS); 541 case SCM_CREDS: 542 return (LINUX_SCM_CREDENTIALS); 543 case SCM_TIMESTAMP: 544 return (LINUX_SCM_TIMESTAMP); 545 } 546 return (-1); 547} 548 549static int 550linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 551{ 552 if (lhdr->msg_controllen > INT_MAX) 553 return (ENOBUFS); 554 555 bhdr->msg_name = PTRIN(lhdr->msg_name); 556 bhdr->msg_namelen = lhdr->msg_namelen; 557 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 558 bhdr->msg_iovlen = lhdr->msg_iovlen; 559 bhdr->msg_control = PTRIN(lhdr->msg_control); 560 561 /* 562 * msg_controllen is skipped since BSD and LINUX control messages 563 * are potentially different sizes (e.g. the cred structure used 564 * by SCM_CREDS is different between the two operating system). 565 * 566 * The caller can set it (if necessary) after converting all the 567 * control messages. 568 */ 569 570 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 571 return (0); 572} 573 574static int 575bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 576{ 577 lhdr->msg_name = PTROUT(bhdr->msg_name); 578 lhdr->msg_namelen = bhdr->msg_namelen; 579 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 580 lhdr->msg_iovlen = bhdr->msg_iovlen; 581 lhdr->msg_control = PTROUT(bhdr->msg_control); 582 583 /* 584 * msg_controllen is skipped since BSD and LINUX control messages 585 * are potentially different sizes (e.g. the cred structure used 586 * by SCM_CREDS is different between the two operating system). 587 * 588 * The caller can set it (if necessary) after converting all the 589 * control messages. 590 */ 591 592 /* msg_flags skipped */ 593 return (0); 594} 595 596static int 597linux_set_socket_flags(int lflags, int *flags) 598{ 599 600 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 601 return (EINVAL); 602 if (lflags & LINUX_SOCK_NONBLOCK) 603 *flags |= SOCK_NONBLOCK; 604 if (lflags & LINUX_SOCK_CLOEXEC) 605 *flags |= SOCK_CLOEXEC; 606 return (0); 607} 608 609static int 610linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 611 struct mbuf *control, enum uio_seg segflg) 612{ 613 struct sockaddr *to; 614 int error; 615 616 if (mp->msg_name != NULL) { 617 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); 618 if (error) 619 return (error); 620 mp->msg_name = to; 621 } else 622 to = NULL; 623 624 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 625 segflg); 626 627 if (to) 628 free(to, M_SONAME); 629 return (error); 630} 631 632/* Return 0 if IP_HDRINCL is set for the given socket. */ 633static int 634linux_check_hdrincl(struct thread *td, int s) 635{ 636 int error, optval; 637 socklen_t size_val; 638 639 size_val = sizeof(optval); 640 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 641 &optval, UIO_SYSSPACE, &size_val); 642 if (error) 643 return (error); 644 645 return (optval == 0); 646} 647 648/* 649 * Updated sendto() when IP_HDRINCL is set: 650 * tweak endian-dependent fields in the IP packet. 651 */ 652static int 653linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 654{ 655/* 656 * linux_ip_copysize defines how many bytes we should copy 657 * from the beginning of the IP packet before we customize it for BSD. 658 * It should include all the fields we modify (ip_len and ip_off). 659 */ 660#define linux_ip_copysize 8 661 662 struct ip *packet; 663 struct msghdr msg; 664 struct iovec aiov[1]; 665 int error; 666 667 /* Check that the packet isn't too big or too small. */ 668 if (linux_args->len < linux_ip_copysize || 669 linux_args->len > IP_MAXPACKET) 670 return (EINVAL); 671 672 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK); 673 674 /* Make kernel copy of the packet to be sent */ 675 if ((error = copyin(PTRIN(linux_args->msg), packet, 676 linux_args->len))) 677 goto goout; 678 679 /* Convert fields from Linux to BSD raw IP socket format */ 680 packet->ip_len = linux_args->len; 681 packet->ip_off = ntohs(packet->ip_off); 682 683 /* Prepare the msghdr and iovec structures describing the new packet */ 684 msg.msg_name = PTRIN(linux_args->to); 685 msg.msg_namelen = linux_args->tolen; 686 msg.msg_iov = aiov; 687 msg.msg_iovlen = 1; 688 msg.msg_control = NULL; 689 msg.msg_flags = 0; 690 aiov[0].iov_base = (char *)packet; 691 aiov[0].iov_len = linux_args->len; 692 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 693 NULL, UIO_SYSSPACE); 694goout: 695 free(packet, M_LINUX); 696 return (error); 697} 698 699int 700linux_socket(struct thread *td, struct linux_socket_args *args) 701{ 702 struct socket_args /* { 703 int domain; 704 int type; 705 int protocol; 706 } */ bsd_args; 707 int retval_socket; 708 709 bsd_args.protocol = args->protocol; 710 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 711 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 712 return (EINVAL); 713 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 714 &bsd_args.type); 715 if (retval_socket != 0) 716 return (retval_socket); 717 bsd_args.domain = linux_to_bsd_domain(args->domain); 718 if (bsd_args.domain == -1) 719 return (EAFNOSUPPORT); 720 721 retval_socket = sys_socket(td, &bsd_args); 722 if (retval_socket) 723 return (retval_socket); 724 725 if (bsd_args.type == SOCK_RAW 726 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) 727 && bsd_args.domain == PF_INET) { 728 /* It's a raw IP socket: set the IP_HDRINCL option. */ 729 int hdrincl; 730 731 hdrincl = 1; 732 /* We ignore any error returned by kern_setsockopt() */ 733 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 734 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 735 } 736#ifdef INET6 737 /* 738 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 739 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 740 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 741 * sysctl value. 742 */ 743 if (bsd_args.domain == PF_INET6) { 744 int v6only; 745 746 v6only = 0; 747 /* We ignore any error returned by setsockopt() */ 748 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 749 &v6only, UIO_SYSSPACE, sizeof(v6only)); 750 } 751#endif 752 753 return (retval_socket); 754} 755 756int 757linux_bind(struct thread *td, struct linux_bind_args *args) 758{ 759 struct sockaddr *sa; 760 int error; 761 762 error = linux_getsockaddr(&sa, PTRIN(args->name), 763 args->namelen); 764 if (error) 765 return (error); 766 767 error = kern_bind(td, args->s, sa); 768 free(sa, M_SONAME); 769 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 770 return (EINVAL); 771 return (error); 772} 773 774int 775linux_connect(struct thread *td, struct linux_connect_args *args) 776{ 777 cap_rights_t rights; 778 struct socket *so; 779 struct sockaddr *sa; 780 u_int fflag; 781 int error; 782 783 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), 784 args->namelen); 785 if (error) 786 return (error); 787 788 error = kern_connect(td, args->s, sa); 789 free(sa, M_SONAME); 790 if (error != EISCONN) 791 return (error); 792 793 /* 794 * Linux doesn't return EISCONN the first time it occurs, 795 * when on a non-blocking socket. Instead it returns the 796 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 797 * 798 * XXXRW: Instead of using fgetsock(), check that it is a 799 * socket and use the file descriptor reference instead of 800 * creating a new one. 801 */ 802 error = fgetsock(td, args->s, cap_rights_init(&rights, CAP_CONNECT), 803 &so, &fflag); 804 if (error == 0) { 805 error = EISCONN; 806 if (fflag & FNONBLOCK) { 807 SOCK_LOCK(so); 808 if (so->so_emuldata == 0) 809 error = so->so_error; 810 so->so_emuldata = (void *)1; 811 SOCK_UNLOCK(so); 812 } 813 fputsock(so); 814 } 815 return (error); 816} 817 818int 819linux_listen(struct thread *td, struct linux_listen_args *args) 820{ 821 struct listen_args /* { 822 int s; 823 int backlog; 824 } */ bsd_args; 825 826 bsd_args.s = args->s; 827 bsd_args.backlog = args->backlog; 828 return (sys_listen(td, &bsd_args)); 829} 830 831static int 832linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 833 l_uintptr_t namelen, int flags) 834{ 835 struct accept4_args /* { 836 int s; 837 struct sockaddr * __restrict name; 838 socklen_t * __restrict anamelen; 839 int flags; 840 } */ bsd_args; 841 cap_rights_t rights; 842 struct socket *so; 843 struct file *fp; 844 int error, error1; 845 846 bsd_args.s = s; 847 /* XXX: */ 848 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); 849 bsd_args.anamelen = PTRIN(namelen);/* XXX */ 850 bsd_args.flags = 0; 851 error = linux_set_socket_flags(flags, &bsd_args.flags); 852 if (error != 0) 853 return (error); 854 error = sys_accept4(td, &bsd_args); 855 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); 856 if (error) { 857 if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) 858 return (EINVAL); 859 if (error == EINVAL) { 860 error1 = getsock_cap(td, s, &rights, &fp, NULL); 861 if (error1 != 0) 862 return (error1); 863 so = fp->f_data; 864 if (so->so_type == SOCK_DGRAM) { 865 fdrop(fp, td); 866 return (EOPNOTSUPP); 867 } 868 fdrop(fp, td); 869 } 870 return (error); 871 } 872 if (addr) 873 error = linux_sa_put(PTRIN(addr)); 874 if (error) { 875 (void)kern_close(td, td->td_retval[0]); 876 td->td_retval[0] = 0; 877 } 878 return (error); 879} 880 881int 882linux_accept(struct thread *td, struct linux_accept_args *args) 883{ 884 885 return (linux_accept_common(td, args->s, args->addr, 886 args->namelen, 0)); 887} 888 889int 890linux_accept4(struct thread *td, struct linux_accept4_args *args) 891{ 892 893 return (linux_accept_common(td, args->s, args->addr, 894 args->namelen, args->flags)); 895} 896 897int 898linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 899{ 900 struct getsockname_args /* { 901 int fdes; 902 struct sockaddr * __restrict asa; 903 socklen_t * __restrict alen; 904 } */ bsd_args; 905 int error; 906 907 bsd_args.fdes = args->s; 908 /* XXX: */ 909 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); 910 bsd_args.alen = PTRIN(args->namelen); /* XXX */ 911 error = sys_getsockname(td, &bsd_args); 912 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 913 if (error) 914 return (error); 915 error = linux_sa_put(PTRIN(args->addr)); 916 if (error) 917 return (error); 918 return (0); 919} 920 921int 922linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 923{ 924 struct getpeername_args /* { 925 int fdes; 926 caddr_t asa; 927 int *alen; 928 } */ bsd_args; 929 int error; 930 931 bsd_args.fdes = args->s; 932 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); 933 bsd_args.alen = (socklen_t *)PTRIN(args->namelen); 934 error = sys_getpeername(td, &bsd_args); 935 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 936 if (error) 937 return (error); 938 error = linux_sa_put(PTRIN(args->addr)); 939 if (error) 940 return (error); 941 return (0); 942} 943 944int 945linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 946{ 947 struct socketpair_args /* { 948 int domain; 949 int type; 950 int protocol; 951 int *rsv; 952 } */ bsd_args; 953 int error; 954 955 bsd_args.domain = linux_to_bsd_domain(args->domain); 956 if (bsd_args.domain != PF_LOCAL) 957 return (EAFNOSUPPORT); 958 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 959 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 960 return (EINVAL); 961 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 962 &bsd_args.type); 963 if (error != 0) 964 return (error); 965 if (args->protocol != 0 && args->protocol != PF_UNIX) 966 967 /* 968 * Use of PF_UNIX as protocol argument is not right, 969 * but Linux does it. 970 * Do not map PF_UNIX as its Linux value is identical 971 * to FreeBSD one. 972 */ 973 return (EPROTONOSUPPORT); 974 else 975 bsd_args.protocol = 0; 976 bsd_args.rsv = (int *)PTRIN(args->rsv); 977 return (sys_socketpair(td, &bsd_args)); 978} 979 980#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 981struct linux_send_args { 982 int s; 983 l_uintptr_t msg; 984 int len; 985 int flags; 986}; 987 988static int 989linux_send(struct thread *td, struct linux_send_args *args) 990{ 991 struct sendto_args /* { 992 int s; 993 caddr_t buf; 994 int len; 995 int flags; 996 caddr_t to; 997 int tolen; 998 } */ bsd_args; 999 1000 bsd_args.s = args->s; 1001 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1002 bsd_args.len = args->len; 1003 bsd_args.flags = args->flags; 1004 bsd_args.to = NULL; 1005 bsd_args.tolen = 0; 1006 return sys_sendto(td, &bsd_args); 1007} 1008 1009struct linux_recv_args { 1010 int s; 1011 l_uintptr_t msg; 1012 int len; 1013 int flags; 1014}; 1015 1016static int 1017linux_recv(struct thread *td, struct linux_recv_args *args) 1018{ 1019 struct recvfrom_args /* { 1020 int s; 1021 caddr_t buf; 1022 int len; 1023 int flags; 1024 struct sockaddr *from; 1025 socklen_t fromlenaddr; 1026 } */ bsd_args; 1027 1028 bsd_args.s = args->s; 1029 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1030 bsd_args.len = args->len; 1031 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1032 bsd_args.from = NULL; 1033 bsd_args.fromlenaddr = 0; 1034 return (sys_recvfrom(td, &bsd_args)); 1035} 1036#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1037 1038int 1039linux_sendto(struct thread *td, struct linux_sendto_args *args) 1040{ 1041 struct msghdr msg; 1042 struct iovec aiov; 1043 int error; 1044 1045 if (linux_check_hdrincl(td, args->s) == 0) 1046 /* IP_HDRINCL set, tweak the packet before sending */ 1047 return (linux_sendto_hdrincl(td, args)); 1048 1049 msg.msg_name = PTRIN(args->to); 1050 msg.msg_namelen = args->tolen; 1051 msg.msg_iov = &aiov; 1052 msg.msg_iovlen = 1; 1053 msg.msg_control = NULL; 1054 msg.msg_flags = 0; 1055 aiov.iov_base = PTRIN(args->msg); 1056 aiov.iov_len = args->len; 1057 error = linux_sendit(td, args->s, &msg, args->flags, NULL, 1058 UIO_USERSPACE); 1059 return (error); 1060} 1061 1062int 1063linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1064{ 1065 struct msghdr msg; 1066 struct iovec aiov; 1067 int error; 1068 1069 if (PTRIN(args->fromlen) != NULL) { 1070 error = copyin(PTRIN(args->fromlen), &msg.msg_namelen, 1071 sizeof(msg.msg_namelen)); 1072 if (error != 0) 1073 return (error); 1074 1075 error = linux_to_bsd_sockaddr((struct sockaddr *)PTRIN(args->from), 1076 msg.msg_namelen); 1077 if (error != 0) 1078 return (error); 1079 } else 1080 msg.msg_namelen = 0; 1081 1082 msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from); 1083 msg.msg_iov = &aiov; 1084 msg.msg_iovlen = 1; 1085 aiov.iov_base = PTRIN(args->buf); 1086 aiov.iov_len = args->len; 1087 msg.msg_control = 0; 1088 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1089 1090 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL); 1091 if (error != 0) 1092 return (error); 1093 1094 if (PTRIN(args->from) != NULL) { 1095 error = bsd_to_linux_sockaddr((struct sockaddr *) 1096 PTRIN(args->from)); 1097 if (error != 0) 1098 return (error); 1099 1100 error = linux_sa_put((struct osockaddr *) 1101 PTRIN(args->from)); 1102 } 1103 1104 if (PTRIN(args->fromlen) != NULL) 1105 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1106 sizeof(msg.msg_namelen)); 1107 1108 return (error); 1109} 1110 1111static int 1112linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1113 l_uint flags) 1114{ 1115 struct cmsghdr *cmsg; 1116 struct cmsgcred cmcred; 1117 struct mbuf *control; 1118 struct msghdr msg; 1119 struct l_cmsghdr linux_cmsg; 1120 struct l_cmsghdr *ptr_cmsg; 1121 struct l_msghdr linux_msg; 1122 struct iovec *iov; 1123 socklen_t datalen; 1124 struct sockaddr *sa; 1125 sa_family_t sa_family; 1126 void *data; 1127 int error; 1128 1129 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1130 if (error != 0) 1131 return (error); 1132 1133 /* 1134 * Some Linux applications (ping) define a non-NULL control data 1135 * pointer, but a msg_controllen of 0, which is not allowed in the 1136 * FreeBSD system call interface. NULL the msg_control pointer in 1137 * order to handle this case. This should be checked, but allows the 1138 * Linux ping to work. 1139 */ 1140 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) 1141 linux_msg.msg_control = PTROUT(NULL); 1142 1143 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1144 if (error != 0) 1145 return (error); 1146 1147#ifdef COMPAT_LINUX32 1148 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1149 &iov, EMSGSIZE); 1150#else 1151 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1152#endif 1153 if (error != 0) 1154 return (error); 1155 1156 control = NULL; 1157 cmsg = NULL; 1158 1159 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { 1160 error = kern_getsockname(td, s, &sa, &datalen); 1161 if (error != 0) 1162 goto bad; 1163 sa_family = sa->sa_family; 1164 free(sa, M_SONAME); 1165 1166 error = ENOBUFS; 1167 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO); 1168 control = m_get(M_WAITOK, MT_CONTROL); 1169 1170 do { 1171 error = copyin(ptr_cmsg, &linux_cmsg, 1172 sizeof(struct l_cmsghdr)); 1173 if (error != 0) 1174 goto bad; 1175 1176 error = EINVAL; 1177 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) 1178 goto bad; 1179 1180 /* 1181 * Now we support only SCM_RIGHTS and SCM_CRED, 1182 * so return EINVAL in any other cmsg_type 1183 */ 1184 cmsg->cmsg_type = 1185 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1186 cmsg->cmsg_level = 1187 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1188 if (cmsg->cmsg_type == -1 1189 || cmsg->cmsg_level != SOL_SOCKET) 1190 goto bad; 1191 1192 /* 1193 * Some applications (e.g. pulseaudio) attempt to 1194 * send ancillary data even if the underlying protocol 1195 * doesn't support it which is not allowed in the 1196 * FreeBSD system call interface. 1197 */ 1198 if (sa_family != AF_UNIX) 1199 continue; 1200 1201 data = LINUX_CMSG_DATA(ptr_cmsg); 1202 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1203 1204 switch (cmsg->cmsg_type) 1205 { 1206 case SCM_RIGHTS: 1207 break; 1208 1209 case SCM_CREDS: 1210 data = &cmcred; 1211 datalen = sizeof(cmcred); 1212 1213 /* 1214 * The lower levels will fill in the structure 1215 */ 1216 bzero(data, datalen); 1217 break; 1218 } 1219 1220 cmsg->cmsg_len = CMSG_LEN(datalen); 1221 1222 error = ENOBUFS; 1223 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg)) 1224 goto bad; 1225 if (!m_append(control, datalen, (c_caddr_t)data)) 1226 goto bad; 1227 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); 1228 1229 if (m_length(control, NULL) == 0) { 1230 m_freem(control); 1231 control = NULL; 1232 } 1233 } 1234 1235 msg.msg_iov = iov; 1236 msg.msg_flags = 0; 1237 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1238 control = NULL; 1239 1240bad: 1241 m_freem(control); 1242 free(iov, M_IOV); 1243 if (cmsg) 1244 free(cmsg, M_LINUX); 1245 return (error); 1246} 1247 1248int 1249linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1250{ 1251 1252 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1253 args->flags)); 1254} 1255 1256int 1257linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1258{ 1259 struct l_mmsghdr *msg; 1260 l_uint retval; 1261 int error, datagrams; 1262 1263 if (args->vlen > UIO_MAXIOV) 1264 args->vlen = UIO_MAXIOV; 1265 1266 msg = PTRIN(args->msg); 1267 datagrams = 0; 1268 while (datagrams < args->vlen) { 1269 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1270 args->flags); 1271 if (error != 0) 1272 break; 1273 1274 retval = td->td_retval[0]; 1275 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1276 if (error != 0) 1277 break; 1278 ++msg; 1279 ++datagrams; 1280 } 1281 if (error == 0) 1282 td->td_retval[0] = datagrams; 1283 return (error); 1284} 1285 1286static int 1287linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1288 l_uint flags, struct msghdr *msg) 1289{ 1290 struct cmsghdr *cm; 1291 struct cmsgcred *cmcred; 1292 struct l_cmsghdr *linux_cmsg = NULL; 1293 struct l_ucred linux_ucred; 1294 socklen_t datalen, outlen; 1295 struct l_msghdr linux_msg; 1296 struct iovec *iov, *uiov; 1297 struct mbuf *control = NULL; 1298 struct mbuf **controlp; 1299 struct timeval *ftmvl; 1300 l_timeval ltmvl; 1301 caddr_t outbuf; 1302 void *data; 1303 int error, i, fd, fds, *fdp; 1304 1305 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1306 if (error != 0) 1307 return (error); 1308 1309 error = linux_to_bsd_msghdr(msg, &linux_msg); 1310 if (error != 0) 1311 return (error); 1312 1313#ifdef COMPAT_LINUX32 1314 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1315 &iov, EMSGSIZE); 1316#else 1317 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1318#endif 1319 if (error != 0) 1320 return (error); 1321 1322 if (msg->msg_name) { 1323 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name, 1324 msg->msg_namelen); 1325 if (error != 0) 1326 goto bad; 1327 } 1328 1329 uiov = msg->msg_iov; 1330 msg->msg_iov = iov; 1331 controlp = (msg->msg_control != NULL) ? &control : NULL; 1332 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp); 1333 msg->msg_iov = uiov; 1334 if (error != 0) 1335 goto bad; 1336 1337 error = bsd_to_linux_msghdr(msg, &linux_msg); 1338 if (error != 0) 1339 goto bad; 1340 1341 if (linux_msg.msg_name) { 1342 error = bsd_to_linux_sockaddr((struct sockaddr *) 1343 PTRIN(linux_msg.msg_name)); 1344 if (error != 0) 1345 goto bad; 1346 } 1347 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1348 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1349 if (error != 0) 1350 goto bad; 1351 } 1352 1353 outbuf = PTRIN(linux_msg.msg_control); 1354 outlen = 0; 1355 1356 if (control) { 1357 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1358 1359 msg->msg_control = mtod(control, struct cmsghdr *); 1360 msg->msg_controllen = control->m_len; 1361 1362 cm = CMSG_FIRSTHDR(msg); 1363 1364 while (cm != NULL) { 1365 linux_cmsg->cmsg_type = 1366 bsd_to_linux_cmsg_type(cm->cmsg_type); 1367 linux_cmsg->cmsg_level = 1368 bsd_to_linux_sockopt_level(cm->cmsg_level); 1369 if (linux_cmsg->cmsg_type == -1 1370 || cm->cmsg_level != SOL_SOCKET) 1371 { 1372 error = EINVAL; 1373 goto bad; 1374 } 1375 1376 data = CMSG_DATA(cm); 1377 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1378 1379 switch (cm->cmsg_type) 1380 { 1381 case SCM_RIGHTS: 1382 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1383 fds = datalen / sizeof(int); 1384 fdp = data; 1385 for (i = 0; i < fds; i++) { 1386 fd = *fdp++; 1387 (void)kern_fcntl(td, fd, 1388 F_SETFD, FD_CLOEXEC); 1389 } 1390 } 1391 break; 1392 1393 case SCM_CREDS: 1394 /* 1395 * Currently LOCAL_CREDS is never in 1396 * effect for Linux so no need to worry 1397 * about sockcred 1398 */ 1399 if (datalen != sizeof(*cmcred)) { 1400 error = EMSGSIZE; 1401 goto bad; 1402 } 1403 cmcred = (struct cmsgcred *)data; 1404 bzero(&linux_ucred, sizeof(linux_ucred)); 1405 linux_ucred.pid = cmcred->cmcred_pid; 1406 linux_ucred.uid = cmcred->cmcred_uid; 1407 linux_ucred.gid = cmcred->cmcred_gid; 1408 data = &linux_ucred; 1409 datalen = sizeof(linux_ucred); 1410 break; 1411 1412 case SCM_TIMESTAMP: 1413 if (datalen != sizeof(struct timeval)) { 1414 error = EMSGSIZE; 1415 goto bad; 1416 } 1417 ftmvl = (struct timeval *)data; 1418 ltmvl.tv_sec = ftmvl->tv_sec; 1419 ltmvl.tv_usec = ftmvl->tv_usec; 1420 data = <mvl; 1421 datalen = sizeof(ltmvl); 1422 break; 1423 } 1424 1425 if (outlen + LINUX_CMSG_LEN(datalen) > 1426 linux_msg.msg_controllen) { 1427 if (outlen == 0) { 1428 error = EMSGSIZE; 1429 goto bad; 1430 } else { 1431 linux_msg.msg_flags |= 1432 LINUX_MSG_CTRUNC; 1433 goto out; 1434 } 1435 } 1436 1437 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1438 1439 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1440 if (error) 1441 goto bad; 1442 outbuf += L_CMSG_HDRSZ; 1443 1444 error = copyout(data, outbuf, datalen); 1445 if (error) 1446 goto bad; 1447 1448 outbuf += LINUX_CMSG_ALIGN(datalen); 1449 outlen += LINUX_CMSG_LEN(datalen); 1450 1451 cm = CMSG_NXTHDR(msg, cm); 1452 } 1453 } 1454 1455out: 1456 linux_msg.msg_controllen = outlen; 1457 error = copyout(&linux_msg, msghdr, sizeof(linux_msg)); 1458 1459bad: 1460 free(iov, M_IOV); 1461 m_freem(control); 1462 free(linux_cmsg, M_LINUX); 1463 1464 return (error); 1465} 1466 1467int 1468linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1469{ 1470 struct msghdr bsd_msg; 1471 1472 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1473 args->flags, &bsd_msg)); 1474} 1475 1476int 1477linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1478{ 1479 struct l_mmsghdr *msg; 1480 struct msghdr bsd_msg; 1481 struct l_timespec lts; 1482 struct timespec ts, tts; 1483 l_uint retval; 1484 int error, datagrams; 1485 1486 if (args->timeout) { 1487 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1488 if (error != 0) 1489 return (error); 1490 error = linux_to_native_timespec(&ts, <s); 1491 if (error != 0) 1492 return (error); 1493 getnanotime(&tts); 1494 timespecadd(&tts, &ts); 1495 } 1496 1497 msg = PTRIN(args->msg); 1498 datagrams = 0; 1499 while (datagrams < args->vlen) { 1500 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1501 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1502 if (error != 0) 1503 break; 1504 1505 retval = td->td_retval[0]; 1506 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1507 if (error != 0) 1508 break; 1509 ++msg; 1510 ++datagrams; 1511 1512 /* 1513 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1514 */ 1515 if (args->flags & LINUX_MSG_WAITFORONE) 1516 args->flags |= LINUX_MSG_DONTWAIT; 1517 1518 /* 1519 * See BUGS section of recvmmsg(2). 1520 */ 1521 if (args->timeout) { 1522 getnanotime(&ts); 1523 timespecsub(&ts, &tts); 1524 if (!timespecisset(&ts) || ts.tv_sec > 0) 1525 break; 1526 } 1527 /* Out of band data, return right away. */ 1528 if (bsd_msg.msg_flags & MSG_OOB) 1529 break; 1530 } 1531 if (error == 0) 1532 td->td_retval[0] = datagrams; 1533 return (error); 1534} 1535 1536int 1537linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1538{ 1539 struct shutdown_args /* { 1540 int s; 1541 int how; 1542 } */ bsd_args; 1543 1544 bsd_args.s = args->s; 1545 bsd_args.how = args->how; 1546 return (sys_shutdown(td, &bsd_args)); 1547} 1548 1549int 1550linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1551{ 1552 struct setsockopt_args /* { 1553 int s; 1554 int level; 1555 int name; 1556 caddr_t val; 1557 int valsize; 1558 } */ bsd_args; 1559 l_timeval linux_tv; 1560 struct timeval tv; 1561 int error, name; 1562 1563 bsd_args.s = args->s; 1564 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1565 switch (bsd_args.level) { 1566 case SOL_SOCKET: 1567 name = linux_to_bsd_so_sockopt(args->optname); 1568 switch (name) { 1569 case SO_RCVTIMEO: 1570 /* FALLTHROUGH */ 1571 case SO_SNDTIMEO: 1572 error = copyin(PTRIN(args->optval), &linux_tv, 1573 sizeof(linux_tv)); 1574 if (error) 1575 return (error); 1576 tv.tv_sec = linux_tv.tv_sec; 1577 tv.tv_usec = linux_tv.tv_usec; 1578 return (kern_setsockopt(td, args->s, bsd_args.level, 1579 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1580 /* NOTREACHED */ 1581 break; 1582 default: 1583 break; 1584 } 1585 break; 1586 case IPPROTO_IP: 1587 name = linux_to_bsd_ip_sockopt(args->optname); 1588 break; 1589 case IPPROTO_IPV6: 1590 name = linux_to_bsd_ip6_sockopt(args->optname); 1591 break; 1592 case IPPROTO_TCP: 1593 name = linux_to_bsd_tcp_sockopt(args->optname); 1594 break; 1595 default: 1596 name = -1; 1597 break; 1598 } 1599 if (name == -1) 1600 return (ENOPROTOOPT); 1601 1602 bsd_args.name = name; 1603 bsd_args.val = PTRIN(args->optval); 1604 bsd_args.valsize = args->optlen; 1605 1606 if (name == IPV6_NEXTHOP) { 1607 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1608 bsd_args.valsize); 1609 error = sys_setsockopt(td, &bsd_args); 1610 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1611 } else 1612 error = sys_setsockopt(td, &bsd_args); 1613 1614 return (error); 1615} 1616 1617int 1618linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1619{ 1620 struct getsockopt_args /* { 1621 int s; 1622 int level; 1623 int name; 1624 caddr_t val; 1625 int *avalsize; 1626 } */ bsd_args; 1627 l_timeval linux_tv; 1628 struct timeval tv; 1629 socklen_t tv_len, xulen; 1630 struct xucred xu; 1631 struct l_ucred lxu; 1632 int error, name; 1633 1634 bsd_args.s = args->s; 1635 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1636 switch (bsd_args.level) { 1637 case SOL_SOCKET: 1638 name = linux_to_bsd_so_sockopt(args->optname); 1639 switch (name) { 1640 case SO_RCVTIMEO: 1641 /* FALLTHROUGH */ 1642 case SO_SNDTIMEO: 1643 tv_len = sizeof(tv); 1644 error = kern_getsockopt(td, args->s, bsd_args.level, 1645 name, &tv, UIO_SYSSPACE, &tv_len); 1646 if (error) 1647 return (error); 1648 linux_tv.tv_sec = tv.tv_sec; 1649 linux_tv.tv_usec = tv.tv_usec; 1650 return (copyout(&linux_tv, PTRIN(args->optval), 1651 sizeof(linux_tv))); 1652 /* NOTREACHED */ 1653 break; 1654 case LOCAL_PEERCRED: 1655 if (args->optlen != sizeof(lxu)) 1656 return (EINVAL); 1657 xulen = sizeof(xu); 1658 error = kern_getsockopt(td, args->s, bsd_args.level, 1659 name, &xu, UIO_SYSSPACE, &xulen); 1660 if (error) 1661 return (error); 1662 /* 1663 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1664 */ 1665 lxu.pid = 0; 1666 lxu.uid = xu.cr_uid; 1667 lxu.gid = xu.cr_gid; 1668 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1669 /* NOTREACHED */ 1670 break; 1671 default: 1672 break; 1673 } 1674 break; 1675 case IPPROTO_IP: 1676 name = linux_to_bsd_ip_sockopt(args->optname); 1677 break; 1678 case IPPROTO_IPV6: 1679 name = linux_to_bsd_ip6_sockopt(args->optname); 1680 break; 1681 case IPPROTO_TCP: 1682 name = linux_to_bsd_tcp_sockopt(args->optname); 1683 break; 1684 default: 1685 name = -1; 1686 break; 1687 } 1688 if (name == -1) 1689 return (EINVAL); 1690 1691 bsd_args.name = name; 1692 bsd_args.val = PTRIN(args->optval); 1693 bsd_args.avalsize = PTRIN(args->optlen); 1694 1695 if (name == IPV6_NEXTHOP) { 1696 error = sys_getsockopt(td, &bsd_args); 1697 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1698 } else 1699 error = sys_getsockopt(td, &bsd_args); 1700 1701 return (error); 1702} 1703 1704#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1705 1706/* Argument list sizes for linux_socketcall */ 1707 1708#define LINUX_AL(x) ((x) * sizeof(l_ulong)) 1709 1710static const unsigned char lxs_args[] = { 1711 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, 1712 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, 1713 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, 1714 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, 1715 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, 1716 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, 1717 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, 1718 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, 1719 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, 1720 LINUX_AL(4) /* accept4 */, LINUX_AL(5) /* recvmmsg */, 1721 LINUX_AL(4) /* sendmmsg */ 1722}; 1723 1724#define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1 1725 1726int 1727linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1728{ 1729 l_ulong a[6]; 1730 void *arg; 1731 int error; 1732 1733 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) 1734 return (EINVAL); 1735 error = copyin(PTRIN(args->args), a, lxs_args[args->what]); 1736 if (error) 1737 return (error); 1738 1739 arg = a; 1740 switch (args->what) { 1741 case LINUX_SOCKET: 1742 return (linux_socket(td, arg)); 1743 case LINUX_BIND: 1744 return (linux_bind(td, arg)); 1745 case LINUX_CONNECT: 1746 return (linux_connect(td, arg)); 1747 case LINUX_LISTEN: 1748 return (linux_listen(td, arg)); 1749 case LINUX_ACCEPT: 1750 return (linux_accept(td, arg)); 1751 case LINUX_GETSOCKNAME: 1752 return (linux_getsockname(td, arg)); 1753 case LINUX_GETPEERNAME: 1754 return (linux_getpeername(td, arg)); 1755 case LINUX_SOCKETPAIR: 1756 return (linux_socketpair(td, arg)); 1757 case LINUX_SEND: 1758 return (linux_send(td, arg)); 1759 case LINUX_RECV: 1760 return (linux_recv(td, arg)); 1761 case LINUX_SENDTO: 1762 return (linux_sendto(td, arg)); 1763 case LINUX_RECVFROM: 1764 return (linux_recvfrom(td, arg)); 1765 case LINUX_SHUTDOWN: 1766 return (linux_shutdown(td, arg)); 1767 case LINUX_SETSOCKOPT: 1768 return (linux_setsockopt(td, arg)); 1769 case LINUX_GETSOCKOPT: 1770 return (linux_getsockopt(td, arg)); 1771 case LINUX_SENDMSG: 1772 return (linux_sendmsg(td, arg)); 1773 case LINUX_RECVMSG: 1774 return (linux_recvmsg(td, arg)); 1775 case LINUX_ACCEPT4: 1776 return (linux_accept4(td, arg)); 1777 case LINUX_RECVMMSG: 1778 return (linux_recvmmsg(td, arg)); 1779 case LINUX_SENDMMSG: 1780 return (linux_sendmmsg(td, arg)); 1781 } 1782 1783 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1784 return (ENOSYS); 1785} 1786#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1787