linux_socket.c revision 321022
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 321022 2017-07-15 17:44:29Z 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 <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, 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_bind(td, 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_connect(td, 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, 859 cap_rights_init(&rights, CAP_ACCEPT), &fp, NULL); 860 if (error1 != 0) 861 return (error1); 862 so = fp->f_data; 863 if (so->so_type == SOCK_DGRAM) { 864 fdrop(fp, td); 865 return (EOPNOTSUPP); 866 } 867 fdrop(fp, td); 868 } 869 return (error); 870 } 871 if (addr) 872 error = linux_sa_put(PTRIN(addr)); 873 if (error) { 874 (void)kern_close(td, td->td_retval[0]); 875 td->td_retval[0] = 0; 876 } 877 return (error); 878} 879 880int 881linux_accept(struct thread *td, struct linux_accept_args *args) 882{ 883 884 return (linux_accept_common(td, args->s, args->addr, 885 args->namelen, 0)); 886} 887 888int 889linux_accept4(struct thread *td, struct linux_accept4_args *args) 890{ 891 892 return (linux_accept_common(td, args->s, args->addr, 893 args->namelen, args->flags)); 894} 895 896int 897linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 898{ 899 struct getsockname_args /* { 900 int fdes; 901 struct sockaddr * __restrict asa; 902 socklen_t * __restrict alen; 903 } */ bsd_args; 904 int error; 905 906 bsd_args.fdes = args->s; 907 /* XXX: */ 908 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); 909 bsd_args.alen = PTRIN(args->namelen); /* XXX */ 910 error = sys_getsockname(td, &bsd_args); 911 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 912 if (error) 913 return (error); 914 return (linux_sa_put(PTRIN(args->addr))); 915} 916 917int 918linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 919{ 920 struct getpeername_args /* { 921 int fdes; 922 caddr_t asa; 923 int *alen; 924 } */ bsd_args; 925 int error; 926 927 bsd_args.fdes = args->s; 928 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); 929 bsd_args.alen = (socklen_t *)PTRIN(args->namelen); 930 error = sys_getpeername(td, &bsd_args); 931 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 932 if (error) 933 return (error); 934 return (linux_sa_put(PTRIN(args->addr))); 935} 936 937int 938linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 939{ 940 struct socketpair_args /* { 941 int domain; 942 int type; 943 int protocol; 944 int *rsv; 945 } */ bsd_args; 946 int error; 947 948 bsd_args.domain = linux_to_bsd_domain(args->domain); 949 if (bsd_args.domain != PF_LOCAL) 950 return (EAFNOSUPPORT); 951 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 952 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 953 return (EINVAL); 954 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 955 &bsd_args.type); 956 if (error != 0) 957 return (error); 958 if (args->protocol != 0 && args->protocol != PF_UNIX) 959 960 /* 961 * Use of PF_UNIX as protocol argument is not right, 962 * but Linux does it. 963 * Do not map PF_UNIX as its Linux value is identical 964 * to FreeBSD one. 965 */ 966 return (EPROTONOSUPPORT); 967 else 968 bsd_args.protocol = 0; 969 bsd_args.rsv = (int *)PTRIN(args->rsv); 970 return (sys_socketpair(td, &bsd_args)); 971} 972 973#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 974struct linux_send_args { 975 int s; 976 l_uintptr_t msg; 977 int len; 978 int flags; 979}; 980 981static int 982linux_send(struct thread *td, struct linux_send_args *args) 983{ 984 struct sendto_args /* { 985 int s; 986 caddr_t buf; 987 int len; 988 int flags; 989 caddr_t to; 990 int tolen; 991 } */ bsd_args; 992 993 bsd_args.s = args->s; 994 bsd_args.buf = (caddr_t)PTRIN(args->msg); 995 bsd_args.len = args->len; 996 bsd_args.flags = args->flags; 997 bsd_args.to = NULL; 998 bsd_args.tolen = 0; 999 return (sys_sendto(td, &bsd_args)); 1000} 1001 1002struct linux_recv_args { 1003 int s; 1004 l_uintptr_t msg; 1005 int len; 1006 int flags; 1007}; 1008 1009static int 1010linux_recv(struct thread *td, struct linux_recv_args *args) 1011{ 1012 struct recvfrom_args /* { 1013 int s; 1014 caddr_t buf; 1015 int len; 1016 int flags; 1017 struct sockaddr *from; 1018 socklen_t fromlenaddr; 1019 } */ bsd_args; 1020 1021 bsd_args.s = args->s; 1022 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1023 bsd_args.len = args->len; 1024 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1025 bsd_args.from = NULL; 1026 bsd_args.fromlenaddr = 0; 1027 return (sys_recvfrom(td, &bsd_args)); 1028} 1029#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1030 1031int 1032linux_sendto(struct thread *td, struct linux_sendto_args *args) 1033{ 1034 struct msghdr msg; 1035 struct iovec aiov; 1036 1037 if (linux_check_hdrincl(td, args->s) == 0) 1038 /* IP_HDRINCL set, tweak the packet before sending */ 1039 return (linux_sendto_hdrincl(td, args)); 1040 1041 msg.msg_name = PTRIN(args->to); 1042 msg.msg_namelen = args->tolen; 1043 msg.msg_iov = &aiov; 1044 msg.msg_iovlen = 1; 1045 msg.msg_control = NULL; 1046 msg.msg_flags = 0; 1047 aiov.iov_base = PTRIN(args->msg); 1048 aiov.iov_len = args->len; 1049 return (linux_sendit(td, args->s, &msg, args->flags, NULL, 1050 UIO_USERSPACE)); 1051} 1052 1053int 1054linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1055{ 1056 struct msghdr msg; 1057 struct iovec aiov; 1058 int error, fromlen; 1059 1060 if (PTRIN(args->fromlen) != NULL) { 1061 error = copyin(PTRIN(args->fromlen), &fromlen, 1062 sizeof(fromlen)); 1063 if (error != 0) 1064 return (error); 1065 if (fromlen < 0) 1066 return (EINVAL); 1067 msg.msg_namelen = fromlen; 1068 } else 1069 msg.msg_namelen = 0; 1070 1071 msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from); 1072 msg.msg_iov = &aiov; 1073 msg.msg_iovlen = 1; 1074 aiov.iov_base = PTRIN(args->buf); 1075 aiov.iov_len = args->len; 1076 msg.msg_control = 0; 1077 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1078 1079 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL); 1080 if (error != 0) 1081 return (error); 1082 1083 if (PTRIN(args->from) != NULL) { 1084 error = bsd_to_linux_sockaddr((struct sockaddr *) 1085 PTRIN(args->from)); 1086 if (error != 0) 1087 return (error); 1088 1089 error = linux_sa_put((struct osockaddr *) 1090 PTRIN(args->from)); 1091 } 1092 1093 if (PTRIN(args->fromlen) != NULL) 1094 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1095 sizeof(msg.msg_namelen)); 1096 1097 return (error); 1098} 1099 1100static int 1101linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1102 l_uint flags) 1103{ 1104 struct cmsghdr *cmsg; 1105 struct cmsgcred cmcred; 1106 struct mbuf *control; 1107 struct msghdr msg; 1108 struct l_cmsghdr linux_cmsg; 1109 struct l_cmsghdr *ptr_cmsg; 1110 struct l_msghdr linux_msg; 1111 struct iovec *iov; 1112 socklen_t datalen; 1113 struct sockaddr *sa; 1114 sa_family_t sa_family; 1115 void *data; 1116 int error; 1117 1118 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1119 if (error != 0) 1120 return (error); 1121 1122 /* 1123 * Some Linux applications (ping) define a non-NULL control data 1124 * pointer, but a msg_controllen of 0, which is not allowed in the 1125 * FreeBSD system call interface. NULL the msg_control pointer in 1126 * order to handle this case. This should be checked, but allows the 1127 * Linux ping to work. 1128 */ 1129 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) 1130 linux_msg.msg_control = PTROUT(NULL); 1131 1132 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1133 if (error != 0) 1134 return (error); 1135 1136#ifdef COMPAT_LINUX32 1137 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1138 &iov, EMSGSIZE); 1139#else 1140 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1141#endif 1142 if (error != 0) 1143 return (error); 1144 1145 control = NULL; 1146 cmsg = NULL; 1147 1148 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { 1149 error = kern_getsockname(td, s, &sa, &datalen); 1150 if (error != 0) 1151 goto bad; 1152 sa_family = sa->sa_family; 1153 free(sa, M_SONAME); 1154 1155 error = ENOBUFS; 1156 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO); 1157 control = m_get(M_WAITOK, MT_CONTROL); 1158 1159 do { 1160 error = copyin(ptr_cmsg, &linux_cmsg, 1161 sizeof(struct l_cmsghdr)); 1162 if (error != 0) 1163 goto bad; 1164 1165 error = EINVAL; 1166 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) 1167 goto bad; 1168 1169 /* 1170 * Now we support only SCM_RIGHTS and SCM_CRED, 1171 * so return EINVAL in any other cmsg_type 1172 */ 1173 cmsg->cmsg_type = 1174 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1175 cmsg->cmsg_level = 1176 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1177 if (cmsg->cmsg_type == -1 1178 || cmsg->cmsg_level != SOL_SOCKET) 1179 goto bad; 1180 1181 /* 1182 * Some applications (e.g. pulseaudio) attempt to 1183 * send ancillary data even if the underlying protocol 1184 * doesn't support it which is not allowed in the 1185 * FreeBSD system call interface. 1186 */ 1187 if (sa_family != AF_UNIX) 1188 continue; 1189 1190 data = LINUX_CMSG_DATA(ptr_cmsg); 1191 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1192 1193 switch (cmsg->cmsg_type) 1194 { 1195 case SCM_RIGHTS: 1196 break; 1197 1198 case SCM_CREDS: 1199 data = &cmcred; 1200 datalen = sizeof(cmcred); 1201 1202 /* 1203 * The lower levels will fill in the structure 1204 */ 1205 bzero(data, datalen); 1206 break; 1207 } 1208 1209 cmsg->cmsg_len = CMSG_LEN(datalen); 1210 1211 error = ENOBUFS; 1212 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg)) 1213 goto bad; 1214 if (!m_append(control, datalen, (c_caddr_t)data)) 1215 goto bad; 1216 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); 1217 1218 if (m_length(control, NULL) == 0) { 1219 m_freem(control); 1220 control = NULL; 1221 } 1222 } 1223 1224 msg.msg_iov = iov; 1225 msg.msg_flags = 0; 1226 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1227 control = NULL; 1228 1229bad: 1230 m_freem(control); 1231 free(iov, M_IOV); 1232 if (cmsg) 1233 free(cmsg, M_LINUX); 1234 return (error); 1235} 1236 1237int 1238linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1239{ 1240 1241 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1242 args->flags)); 1243} 1244 1245int 1246linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1247{ 1248 struct l_mmsghdr *msg; 1249 l_uint retval; 1250 int error, datagrams; 1251 1252 if (args->vlen > UIO_MAXIOV) 1253 args->vlen = UIO_MAXIOV; 1254 1255 msg = PTRIN(args->msg); 1256 datagrams = 0; 1257 while (datagrams < args->vlen) { 1258 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1259 args->flags); 1260 if (error != 0) 1261 break; 1262 1263 retval = td->td_retval[0]; 1264 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1265 if (error != 0) 1266 break; 1267 ++msg; 1268 ++datagrams; 1269 } 1270 if (error == 0) 1271 td->td_retval[0] = datagrams; 1272 return (error); 1273} 1274 1275static int 1276linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1277 l_uint flags, struct msghdr *msg) 1278{ 1279 struct cmsghdr *cm; 1280 struct cmsgcred *cmcred; 1281 struct l_cmsghdr *linux_cmsg = NULL; 1282 struct l_ucred linux_ucred; 1283 socklen_t datalen, outlen; 1284 struct l_msghdr linux_msg; 1285 struct iovec *iov, *uiov; 1286 struct mbuf *control = NULL; 1287 struct mbuf **controlp; 1288 struct timeval *ftmvl; 1289 l_timeval ltmvl; 1290 caddr_t outbuf; 1291 void *data; 1292 int error, i, fd, fds, *fdp; 1293 1294 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1295 if (error != 0) 1296 return (error); 1297 1298 error = linux_to_bsd_msghdr(msg, &linux_msg); 1299 if (error != 0) 1300 return (error); 1301 1302#ifdef COMPAT_LINUX32 1303 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1304 &iov, EMSGSIZE); 1305#else 1306 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1307#endif 1308 if (error != 0) 1309 return (error); 1310 1311 if (msg->msg_name) { 1312 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name, 1313 msg->msg_namelen); 1314 if (error != 0) 1315 goto bad; 1316 } 1317 1318 uiov = msg->msg_iov; 1319 msg->msg_iov = iov; 1320 controlp = (msg->msg_control != NULL) ? &control : NULL; 1321 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp); 1322 msg->msg_iov = uiov; 1323 if (error != 0) 1324 goto bad; 1325 1326 error = bsd_to_linux_msghdr(msg, &linux_msg); 1327 if (error != 0) 1328 goto bad; 1329 1330 if (linux_msg.msg_name) { 1331 error = bsd_to_linux_sockaddr((struct sockaddr *) 1332 PTRIN(linux_msg.msg_name)); 1333 if (error != 0) 1334 goto bad; 1335 } 1336 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1337 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1338 if (error != 0) 1339 goto bad; 1340 } 1341 1342 outbuf = PTRIN(linux_msg.msg_control); 1343 outlen = 0; 1344 1345 if (control) { 1346 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1347 1348 msg->msg_control = mtod(control, struct cmsghdr *); 1349 msg->msg_controllen = control->m_len; 1350 1351 cm = CMSG_FIRSTHDR(msg); 1352 1353 while (cm != NULL) { 1354 linux_cmsg->cmsg_type = 1355 bsd_to_linux_cmsg_type(cm->cmsg_type); 1356 linux_cmsg->cmsg_level = 1357 bsd_to_linux_sockopt_level(cm->cmsg_level); 1358 if (linux_cmsg->cmsg_type == -1 1359 || cm->cmsg_level != SOL_SOCKET) 1360 { 1361 error = EINVAL; 1362 goto bad; 1363 } 1364 1365 data = CMSG_DATA(cm); 1366 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1367 1368 switch (cm->cmsg_type) 1369 { 1370 case SCM_RIGHTS: 1371 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1372 fds = datalen / sizeof(int); 1373 fdp = data; 1374 for (i = 0; i < fds; i++) { 1375 fd = *fdp++; 1376 (void)kern_fcntl(td, fd, 1377 F_SETFD, FD_CLOEXEC); 1378 } 1379 } 1380 break; 1381 1382 case SCM_CREDS: 1383 /* 1384 * Currently LOCAL_CREDS is never in 1385 * effect for Linux so no need to worry 1386 * about sockcred 1387 */ 1388 if (datalen != sizeof(*cmcred)) { 1389 error = EMSGSIZE; 1390 goto bad; 1391 } 1392 cmcred = (struct cmsgcred *)data; 1393 bzero(&linux_ucred, sizeof(linux_ucred)); 1394 linux_ucred.pid = cmcred->cmcred_pid; 1395 linux_ucred.uid = cmcred->cmcred_uid; 1396 linux_ucred.gid = cmcred->cmcred_gid; 1397 data = &linux_ucred; 1398 datalen = sizeof(linux_ucred); 1399 break; 1400 1401 case SCM_TIMESTAMP: 1402 if (datalen != sizeof(struct timeval)) { 1403 error = EMSGSIZE; 1404 goto bad; 1405 } 1406 ftmvl = (struct timeval *)data; 1407 ltmvl.tv_sec = ftmvl->tv_sec; 1408 ltmvl.tv_usec = ftmvl->tv_usec; 1409 data = <mvl; 1410 datalen = sizeof(ltmvl); 1411 break; 1412 } 1413 1414 if (outlen + LINUX_CMSG_LEN(datalen) > 1415 linux_msg.msg_controllen) { 1416 if (outlen == 0) { 1417 error = EMSGSIZE; 1418 goto bad; 1419 } else { 1420 linux_msg.msg_flags |= 1421 LINUX_MSG_CTRUNC; 1422 goto out; 1423 } 1424 } 1425 1426 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1427 1428 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1429 if (error) 1430 goto bad; 1431 outbuf += L_CMSG_HDRSZ; 1432 1433 error = copyout(data, outbuf, datalen); 1434 if (error) 1435 goto bad; 1436 1437 outbuf += LINUX_CMSG_ALIGN(datalen); 1438 outlen += LINUX_CMSG_LEN(datalen); 1439 1440 cm = CMSG_NXTHDR(msg, cm); 1441 } 1442 } 1443 1444out: 1445 linux_msg.msg_controllen = outlen; 1446 error = copyout(&linux_msg, msghdr, sizeof(linux_msg)); 1447 1448bad: 1449 free(iov, M_IOV); 1450 m_freem(control); 1451 free(linux_cmsg, M_LINUX); 1452 1453 return (error); 1454} 1455 1456int 1457linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1458{ 1459 struct msghdr bsd_msg; 1460 1461 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1462 args->flags, &bsd_msg)); 1463} 1464 1465int 1466linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1467{ 1468 struct l_mmsghdr *msg; 1469 struct msghdr bsd_msg; 1470 struct l_timespec lts; 1471 struct timespec ts, tts; 1472 l_uint retval; 1473 int error, datagrams; 1474 1475 if (args->timeout) { 1476 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1477 if (error != 0) 1478 return (error); 1479 error = linux_to_native_timespec(&ts, <s); 1480 if (error != 0) 1481 return (error); 1482 getnanotime(&tts); 1483 timespecadd(&tts, &ts); 1484 } 1485 1486 msg = PTRIN(args->msg); 1487 datagrams = 0; 1488 while (datagrams < args->vlen) { 1489 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1490 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1491 if (error != 0) 1492 break; 1493 1494 retval = td->td_retval[0]; 1495 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1496 if (error != 0) 1497 break; 1498 ++msg; 1499 ++datagrams; 1500 1501 /* 1502 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1503 */ 1504 if (args->flags & LINUX_MSG_WAITFORONE) 1505 args->flags |= LINUX_MSG_DONTWAIT; 1506 1507 /* 1508 * See BUGS section of recvmmsg(2). 1509 */ 1510 if (args->timeout) { 1511 getnanotime(&ts); 1512 timespecsub(&ts, &tts); 1513 if (!timespecisset(&ts) || ts.tv_sec > 0) 1514 break; 1515 } 1516 /* Out of band data, return right away. */ 1517 if (bsd_msg.msg_flags & MSG_OOB) 1518 break; 1519 } 1520 if (error == 0) 1521 td->td_retval[0] = datagrams; 1522 return (error); 1523} 1524 1525int 1526linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1527{ 1528 struct shutdown_args /* { 1529 int s; 1530 int how; 1531 } */ bsd_args; 1532 1533 bsd_args.s = args->s; 1534 bsd_args.how = args->how; 1535 return (sys_shutdown(td, &bsd_args)); 1536} 1537 1538int 1539linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1540{ 1541 struct setsockopt_args /* { 1542 int s; 1543 int level; 1544 int name; 1545 caddr_t val; 1546 int valsize; 1547 } */ bsd_args; 1548 l_timeval linux_tv; 1549 struct timeval tv; 1550 int error, name; 1551 1552 bsd_args.s = args->s; 1553 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1554 switch (bsd_args.level) { 1555 case SOL_SOCKET: 1556 name = linux_to_bsd_so_sockopt(args->optname); 1557 switch (name) { 1558 case SO_RCVTIMEO: 1559 /* FALLTHROUGH */ 1560 case SO_SNDTIMEO: 1561 error = copyin(PTRIN(args->optval), &linux_tv, 1562 sizeof(linux_tv)); 1563 if (error) 1564 return (error); 1565 tv.tv_sec = linux_tv.tv_sec; 1566 tv.tv_usec = linux_tv.tv_usec; 1567 return (kern_setsockopt(td, args->s, bsd_args.level, 1568 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1569 /* NOTREACHED */ 1570 break; 1571 default: 1572 break; 1573 } 1574 break; 1575 case IPPROTO_IP: 1576 name = linux_to_bsd_ip_sockopt(args->optname); 1577 break; 1578 case IPPROTO_IPV6: 1579 name = linux_to_bsd_ip6_sockopt(args->optname); 1580 break; 1581 case IPPROTO_TCP: 1582 name = linux_to_bsd_tcp_sockopt(args->optname); 1583 break; 1584 default: 1585 name = -1; 1586 break; 1587 } 1588 if (name == -1) 1589 return (ENOPROTOOPT); 1590 1591 bsd_args.name = name; 1592 bsd_args.val = PTRIN(args->optval); 1593 bsd_args.valsize = args->optlen; 1594 1595 if (name == IPV6_NEXTHOP) { 1596 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1597 bsd_args.valsize); 1598 error = sys_setsockopt(td, &bsd_args); 1599 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1600 } else 1601 error = sys_setsockopt(td, &bsd_args); 1602 1603 return (error); 1604} 1605 1606int 1607linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1608{ 1609 struct getsockopt_args /* { 1610 int s; 1611 int level; 1612 int name; 1613 caddr_t val; 1614 int *avalsize; 1615 } */ bsd_args; 1616 l_timeval linux_tv; 1617 struct timeval tv; 1618 socklen_t tv_len, xulen, len; 1619 struct xucred xu; 1620 struct l_ucred lxu; 1621 int error, name, newval; 1622 1623 bsd_args.s = args->s; 1624 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1625 switch (bsd_args.level) { 1626 case SOL_SOCKET: 1627 name = linux_to_bsd_so_sockopt(args->optname); 1628 switch (name) { 1629 case SO_RCVTIMEO: 1630 /* FALLTHROUGH */ 1631 case SO_SNDTIMEO: 1632 tv_len = sizeof(tv); 1633 error = kern_getsockopt(td, args->s, bsd_args.level, 1634 name, &tv, UIO_SYSSPACE, &tv_len); 1635 if (error) 1636 return (error); 1637 linux_tv.tv_sec = tv.tv_sec; 1638 linux_tv.tv_usec = tv.tv_usec; 1639 return (copyout(&linux_tv, PTRIN(args->optval), 1640 sizeof(linux_tv))); 1641 /* NOTREACHED */ 1642 break; 1643 case LOCAL_PEERCRED: 1644 if (args->optlen != sizeof(lxu)) 1645 return (EINVAL); 1646 xulen = sizeof(xu); 1647 error = kern_getsockopt(td, args->s, bsd_args.level, 1648 name, &xu, UIO_SYSSPACE, &xulen); 1649 if (error) 1650 return (error); 1651 /* 1652 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1653 */ 1654 lxu.pid = 0; 1655 lxu.uid = xu.cr_uid; 1656 lxu.gid = xu.cr_gid; 1657 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1658 /* NOTREACHED */ 1659 break; 1660 case SO_ERROR: 1661 len = sizeof(newval); 1662 error = kern_getsockopt(td, args->s, bsd_args.level, 1663 name, &newval, UIO_SYSSPACE, &len); 1664 if (error) 1665 return (error); 1666 newval = -SV_ABI_ERRNO(td->td_proc, newval); 1667 return (copyout(&newval, PTRIN(args->optval), len)); 1668 /* NOTREACHED */ 1669 default: 1670 break; 1671 } 1672 break; 1673 case IPPROTO_IP: 1674 name = linux_to_bsd_ip_sockopt(args->optname); 1675 break; 1676 case IPPROTO_IPV6: 1677 name = linux_to_bsd_ip6_sockopt(args->optname); 1678 break; 1679 case IPPROTO_TCP: 1680 name = linux_to_bsd_tcp_sockopt(args->optname); 1681 break; 1682 default: 1683 name = -1; 1684 break; 1685 } 1686 if (name == -1) 1687 return (EINVAL); 1688 1689 bsd_args.name = name; 1690 bsd_args.val = PTRIN(args->optval); 1691 bsd_args.avalsize = PTRIN(args->optlen); 1692 1693 if (name == IPV6_NEXTHOP) { 1694 error = sys_getsockopt(td, &bsd_args); 1695 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1696 } else 1697 error = sys_getsockopt(td, &bsd_args); 1698 1699 return (error); 1700} 1701 1702#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1703 1704/* Argument list sizes for linux_socketcall */ 1705 1706#define LINUX_AL(x) ((x) * sizeof(l_ulong)) 1707 1708static const unsigned char lxs_args[] = { 1709 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, 1710 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, 1711 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, 1712 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, 1713 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, 1714 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, 1715 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, 1716 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, 1717 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, 1718 LINUX_AL(4) /* accept4 */, LINUX_AL(5) /* recvmmsg */, 1719 LINUX_AL(4) /* sendmmsg */ 1720}; 1721 1722#define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1 1723 1724int 1725linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1726{ 1727 l_ulong a[6]; 1728 void *arg; 1729 int error; 1730 1731 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) 1732 return (EINVAL); 1733 error = copyin(PTRIN(args->args), a, lxs_args[args->what]); 1734 if (error) 1735 return (error); 1736 1737 arg = a; 1738 switch (args->what) { 1739 case LINUX_SOCKET: 1740 return (linux_socket(td, arg)); 1741 case LINUX_BIND: 1742 return (linux_bind(td, arg)); 1743 case LINUX_CONNECT: 1744 return (linux_connect(td, arg)); 1745 case LINUX_LISTEN: 1746 return (linux_listen(td, arg)); 1747 case LINUX_ACCEPT: 1748 return (linux_accept(td, arg)); 1749 case LINUX_GETSOCKNAME: 1750 return (linux_getsockname(td, arg)); 1751 case LINUX_GETPEERNAME: 1752 return (linux_getpeername(td, arg)); 1753 case LINUX_SOCKETPAIR: 1754 return (linux_socketpair(td, arg)); 1755 case LINUX_SEND: 1756 return (linux_send(td, arg)); 1757 case LINUX_RECV: 1758 return (linux_recv(td, arg)); 1759 case LINUX_SENDTO: 1760 return (linux_sendto(td, arg)); 1761 case LINUX_RECVFROM: 1762 return (linux_recvfrom(td, arg)); 1763 case LINUX_SHUTDOWN: 1764 return (linux_shutdown(td, arg)); 1765 case LINUX_SETSOCKOPT: 1766 return (linux_setsockopt(td, arg)); 1767 case LINUX_GETSOCKOPT: 1768 return (linux_getsockopt(td, arg)); 1769 case LINUX_SENDMSG: 1770 return (linux_sendmsg(td, arg)); 1771 case LINUX_RECVMSG: 1772 return (linux_recvmsg(td, arg)); 1773 case LINUX_ACCEPT4: 1774 return (linux_accept4(td, arg)); 1775 case LINUX_RECVMMSG: 1776 return (linux_recvmmsg(td, arg)); 1777 case LINUX_SENDMMSG: 1778 return (linux_sendmmsg(td, arg)); 1779 } 1780 1781 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1782 return (ENOSYS); 1783} 1784#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1785