linux_socket.c revision 315549
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/11/sys/compat/linux/linux_socket.c 315549 2017-03-19 14:25:23Z trasz $"); 31 32/* XXX we use functions that might not exist. */ 33#include "opt_compat.h" 34#include "opt_inet6.h" 35 36#include <sys/param.h> 37#include <sys/proc.h> 38#include <sys/systm.h> 39#include <sys/sysproto.h> 40#include <sys/capsicum.h> 41#include <sys/fcntl.h> 42#include <sys/file.h> 43#include <sys/limits.h> 44#include <sys/lock.h> 45#include <sys/malloc.h> 46#include <sys/mutex.h> 47#include <sys/mbuf.h> 48#include <sys/socket.h> 49#include <sys/socketvar.h> 50#include <sys/syscallsubr.h> 51#include <sys/uio.h> 52#include <sys/syslog.h> 53#include <sys/un.h> 54 55#include <net/if.h> 56#include <net/vnet.h> 57#include <netinet/in.h> 58#include <netinet/in_systm.h> 59#include <netinet/ip.h> 60#include <netinet/tcp.h> 61#ifdef INET6 62#include <netinet/ip6.h> 63#include <netinet6/ip6_var.h> 64#endif 65 66#ifdef COMPAT_LINUX32 67#include <machine/../linux32/linux.h> 68#include <machine/../linux32/linux32_proto.h> 69#else 70#include <machine/../linux/linux.h> 71#include <machine/../linux/linux_proto.h> 72#endif 73#include <compat/linux/linux_file.h> 74#include <compat/linux/linux_socket.h> 75#include <compat/linux/linux_timer.h> 76#include <compat/linux/linux_util.h> 77 78static int linux_to_bsd_domain(int); 79static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *, 80 l_uint); 81static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *, 82 l_uint, struct msghdr *); 83static int linux_set_socket_flags(int, int *); 84 85/* 86 * Reads a linux sockaddr and does any necessary translation. 87 * Linux sockaddrs don't have a length field, only a family. 88 * Copy the osockaddr structure pointed to by osa to kernel, adjust 89 * family and convert to sockaddr. 90 */ 91static int 92linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen) 93{ 94 struct sockaddr *sa; 95 struct osockaddr *kosa; 96#ifdef INET6 97 struct sockaddr_in6 *sin6; 98 int oldv6size; 99#endif 100 char *name; 101 int bdom, error, hdrlen, namelen; 102 103 if (salen < 2 || salen > UCHAR_MAX || !osa) 104 return (EINVAL); 105 106#ifdef INET6 107 oldv6size = 0; 108 /* 109 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it 110 * if it's a v4-mapped address, so reserve the proper space 111 * for it. 112 */ 113 if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { 114 salen += sizeof(uint32_t); 115 oldv6size = 1; 116 } 117#endif 118 119 kosa = malloc(salen, M_SONAME, M_WAITOK); 120 121 if ((error = copyin(osa, kosa, salen))) 122 goto out; 123 124 bdom = linux_to_bsd_domain(kosa->sa_family); 125 if (bdom == -1) { 126 error = EAFNOSUPPORT; 127 goto out; 128 } 129 130#ifdef INET6 131 /* 132 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 133 * which lacks the scope id compared with RFC2553 one. If we detect 134 * the situation, reject the address and write a message to system log. 135 * 136 * Still accept addresses for which the scope id is not used. 137 */ 138 if (oldv6size) { 139 if (bdom == AF_INET6) { 140 sin6 = (struct sockaddr_in6 *)kosa; 141 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 142 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 143 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 144 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && 145 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 146 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 147 sin6->sin6_scope_id = 0; 148 } else { 149 log(LOG_DEBUG, 150 "obsolete pre-RFC2553 sockaddr_in6 rejected\n"); 151 error = EINVAL; 152 goto out; 153 } 154 } else 155 salen -= sizeof(uint32_t); 156 } 157#endif 158 if (bdom == AF_INET) { 159 if (salen < sizeof(struct sockaddr_in)) { 160 error = EINVAL; 161 goto out; 162 } 163 salen = sizeof(struct sockaddr_in); 164 } 165 166 if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) { 167 hdrlen = offsetof(struct sockaddr_un, sun_path); 168 name = ((struct sockaddr_un *)kosa)->sun_path; 169 if (*name == '\0') { 170 /* 171 * Linux abstract namespace starts with a NULL byte. 172 * XXX We do not support abstract namespace yet. 173 */ 174 namelen = strnlen(name + 1, salen - hdrlen - 1) + 1; 175 } else 176 namelen = strnlen(name, salen - hdrlen); 177 salen = hdrlen + namelen; 178 if (salen > sizeof(struct sockaddr_un)) { 179 error = ENAMETOOLONG; 180 goto out; 181 } 182 } 183 184 sa = (struct sockaddr *)kosa; 185 sa->sa_family = bdom; 186 sa->sa_len = salen; 187 188 *sap = sa; 189 return (0); 190 191out: 192 free(kosa, M_SONAME); 193 return (error); 194} 195 196static int 197linux_to_bsd_domain(int domain) 198{ 199 200 switch (domain) { 201 case LINUX_AF_UNSPEC: 202 return (AF_UNSPEC); 203 case LINUX_AF_UNIX: 204 return (AF_LOCAL); 205 case LINUX_AF_INET: 206 return (AF_INET); 207 case LINUX_AF_INET6: 208 return (AF_INET6); 209 case LINUX_AF_AX25: 210 return (AF_CCITT); 211 case LINUX_AF_IPX: 212 return (AF_IPX); 213 case LINUX_AF_APPLETALK: 214 return (AF_APPLETALK); 215 } 216 return (-1); 217} 218 219static int 220bsd_to_linux_domain(int domain) 221{ 222 223 switch (domain) { 224 case AF_UNSPEC: 225 return (LINUX_AF_UNSPEC); 226 case AF_LOCAL: 227 return (LINUX_AF_UNIX); 228 case AF_INET: 229 return (LINUX_AF_INET); 230 case AF_INET6: 231 return (LINUX_AF_INET6); 232 case AF_CCITT: 233 return (LINUX_AF_AX25); 234 case AF_IPX: 235 return (LINUX_AF_IPX); 236 case AF_APPLETALK: 237 return (LINUX_AF_APPLETALK); 238 } 239 return (-1); 240} 241 242static int 243linux_to_bsd_sockopt_level(int level) 244{ 245 246 switch (level) { 247 case LINUX_SOL_SOCKET: 248 return (SOL_SOCKET); 249 } 250 return (level); 251} 252 253static int 254bsd_to_linux_sockopt_level(int level) 255{ 256 257 switch (level) { 258 case SOL_SOCKET: 259 return (LINUX_SOL_SOCKET); 260 } 261 return (level); 262} 263 264static int 265linux_to_bsd_ip_sockopt(int opt) 266{ 267 268 switch (opt) { 269 case LINUX_IP_TOS: 270 return (IP_TOS); 271 case LINUX_IP_TTL: 272 return (IP_TTL); 273 case LINUX_IP_OPTIONS: 274 return (IP_OPTIONS); 275 case LINUX_IP_MULTICAST_IF: 276 return (IP_MULTICAST_IF); 277 case LINUX_IP_MULTICAST_TTL: 278 return (IP_MULTICAST_TTL); 279 case LINUX_IP_MULTICAST_LOOP: 280 return (IP_MULTICAST_LOOP); 281 case LINUX_IP_ADD_MEMBERSHIP: 282 return (IP_ADD_MEMBERSHIP); 283 case LINUX_IP_DROP_MEMBERSHIP: 284 return (IP_DROP_MEMBERSHIP); 285 case LINUX_IP_HDRINCL: 286 return (IP_HDRINCL); 287 } 288 return (-1); 289} 290 291static int 292linux_to_bsd_ip6_sockopt(int opt) 293{ 294 295 switch (opt) { 296 case LINUX_IPV6_NEXTHOP: 297 return (IPV6_NEXTHOP); 298 case LINUX_IPV6_UNICAST_HOPS: 299 return (IPV6_UNICAST_HOPS); 300 case LINUX_IPV6_MULTICAST_IF: 301 return (IPV6_MULTICAST_IF); 302 case LINUX_IPV6_MULTICAST_HOPS: 303 return (IPV6_MULTICAST_HOPS); 304 case LINUX_IPV6_MULTICAST_LOOP: 305 return (IPV6_MULTICAST_LOOP); 306 case LINUX_IPV6_ADD_MEMBERSHIP: 307 return (IPV6_JOIN_GROUP); 308 case LINUX_IPV6_DROP_MEMBERSHIP: 309 return (IPV6_LEAVE_GROUP); 310 case LINUX_IPV6_V6ONLY: 311 return (IPV6_V6ONLY); 312 case LINUX_IPV6_DONTFRAG: 313 return (IPV6_DONTFRAG); 314#if 0 315 case LINUX_IPV6_CHECKSUM: 316 return (IPV6_CHECKSUM); 317 case LINUX_IPV6_RECVPKTINFO: 318 return (IPV6_RECVPKTINFO); 319 case LINUX_IPV6_PKTINFO: 320 return (IPV6_PKTINFO); 321 case LINUX_IPV6_RECVHOPLIMIT: 322 return (IPV6_RECVHOPLIMIT); 323 case LINUX_IPV6_HOPLIMIT: 324 return (IPV6_HOPLIMIT); 325 case LINUX_IPV6_RECVHOPOPTS: 326 return (IPV6_RECVHOPOPTS); 327 case LINUX_IPV6_HOPOPTS: 328 return (IPV6_HOPOPTS); 329 case LINUX_IPV6_RTHDRDSTOPTS: 330 return (IPV6_RTHDRDSTOPTS); 331 case LINUX_IPV6_RECVRTHDR: 332 return (IPV6_RECVRTHDR); 333 case LINUX_IPV6_RTHDR: 334 return (IPV6_RTHDR); 335 case LINUX_IPV6_RECVDSTOPTS: 336 return (IPV6_RECVDSTOPTS); 337 case LINUX_IPV6_DSTOPTS: 338 return (IPV6_DSTOPTS); 339 case LINUX_IPV6_RECVPATHMTU: 340 return (IPV6_RECVPATHMTU); 341 case LINUX_IPV6_PATHMTU: 342 return (IPV6_PATHMTU); 343#endif 344 } 345 return (-1); 346} 347 348static int 349linux_to_bsd_so_sockopt(int opt) 350{ 351 352 switch (opt) { 353 case LINUX_SO_DEBUG: 354 return (SO_DEBUG); 355 case LINUX_SO_REUSEADDR: 356 return (SO_REUSEADDR); 357 case LINUX_SO_TYPE: 358 return (SO_TYPE); 359 case LINUX_SO_ERROR: 360 return (SO_ERROR); 361 case LINUX_SO_DONTROUTE: 362 return (SO_DONTROUTE); 363 case LINUX_SO_BROADCAST: 364 return (SO_BROADCAST); 365 case LINUX_SO_SNDBUF: 366 return (SO_SNDBUF); 367 case LINUX_SO_RCVBUF: 368 return (SO_RCVBUF); 369 case LINUX_SO_KEEPALIVE: 370 return (SO_KEEPALIVE); 371 case LINUX_SO_OOBINLINE: 372 return (SO_OOBINLINE); 373 case LINUX_SO_LINGER: 374 return (SO_LINGER); 375 case LINUX_SO_PEERCRED: 376 return (LOCAL_PEERCRED); 377 case LINUX_SO_RCVLOWAT: 378 return (SO_RCVLOWAT); 379 case LINUX_SO_SNDLOWAT: 380 return (SO_SNDLOWAT); 381 case LINUX_SO_RCVTIMEO: 382 return (SO_RCVTIMEO); 383 case LINUX_SO_SNDTIMEO: 384 return (SO_SNDTIMEO); 385 case LINUX_SO_TIMESTAMP: 386 return (SO_TIMESTAMP); 387 case LINUX_SO_ACCEPTCONN: 388 return (SO_ACCEPTCONN); 389 } 390 return (-1); 391} 392 393static int 394linux_to_bsd_tcp_sockopt(int opt) 395{ 396 397 switch (opt) { 398 case LINUX_TCP_NODELAY: 399 return (TCP_NODELAY); 400 case LINUX_TCP_MAXSEG: 401 return (TCP_MAXSEG); 402 case LINUX_TCP_KEEPIDLE: 403 return (TCP_KEEPIDLE); 404 case LINUX_TCP_KEEPINTVL: 405 return (TCP_KEEPINTVL); 406 case LINUX_TCP_KEEPCNT: 407 return (TCP_KEEPCNT); 408 case LINUX_TCP_MD5SIG: 409 return (TCP_MD5SIG); 410 } 411 return (-1); 412} 413 414static int 415linux_to_bsd_msg_flags(int flags) 416{ 417 int ret_flags = 0; 418 419 if (flags & LINUX_MSG_OOB) 420 ret_flags |= MSG_OOB; 421 if (flags & LINUX_MSG_PEEK) 422 ret_flags |= MSG_PEEK; 423 if (flags & LINUX_MSG_DONTROUTE) 424 ret_flags |= MSG_DONTROUTE; 425 if (flags & LINUX_MSG_CTRUNC) 426 ret_flags |= MSG_CTRUNC; 427 if (flags & LINUX_MSG_TRUNC) 428 ret_flags |= MSG_TRUNC; 429 if (flags & LINUX_MSG_DONTWAIT) 430 ret_flags |= MSG_DONTWAIT; 431 if (flags & LINUX_MSG_EOR) 432 ret_flags |= MSG_EOR; 433 if (flags & LINUX_MSG_WAITALL) 434 ret_flags |= MSG_WAITALL; 435 if (flags & LINUX_MSG_NOSIGNAL) 436 ret_flags |= MSG_NOSIGNAL; 437#if 0 /* not handled */ 438 if (flags & LINUX_MSG_PROXY) 439 ; 440 if (flags & LINUX_MSG_FIN) 441 ; 442 if (flags & LINUX_MSG_SYN) 443 ; 444 if (flags & LINUX_MSG_CONFIRM) 445 ; 446 if (flags & LINUX_MSG_RST) 447 ; 448 if (flags & LINUX_MSG_ERRQUEUE) 449 ; 450#endif 451 return (ret_flags); 452} 453 454/* 455* If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the 456* native syscall will fault. Thus, we don't really need to check the 457* return values for these functions. 458*/ 459 460static int 461bsd_to_linux_sockaddr(struct sockaddr *arg) 462{ 463 struct sockaddr sa; 464 size_t sa_len = sizeof(struct sockaddr); 465 int error, bdom; 466 467 if ((error = copyin(arg, &sa, sa_len))) 468 return (error); 469 470 bdom = bsd_to_linux_domain(sa.sa_family); 471 if (bdom == -1) 472 return (EAFNOSUPPORT); 473 474 *(u_short *)&sa = bdom; 475 return (copyout(&sa, arg, sa_len)); 476} 477 478static int 479linux_to_bsd_sockaddr(struct sockaddr *arg, int len) 480{ 481 struct sockaddr sa; 482 size_t sa_len = sizeof(struct sockaddr); 483 int error, bdom; 484 485 if ((error = copyin(arg, &sa, sa_len))) 486 return (error); 487 488 bdom = linux_to_bsd_domain(*(sa_family_t *)&sa); 489 if (bdom == -1) 490 return (EAFNOSUPPORT); 491 492 sa.sa_family = bdom; 493 sa.sa_len = len; 494 return (copyout(&sa, arg, sa_len)); 495} 496 497static int 498linux_sa_put(struct osockaddr *osa) 499{ 500 struct osockaddr sa; 501 int error, bdom; 502 503 /* 504 * Only read/write the osockaddr family part, the rest is 505 * not changed. 506 */ 507 error = copyin(osa, &sa, sizeof(sa.sa_family)); 508 if (error != 0) 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 != 0) 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 != 0) 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 int domain, retval_socket, type; 701 702 type = args->type & LINUX_SOCK_TYPE_MASK; 703 if (type < 0 || type > LINUX_SOCK_MAX) 704 return (EINVAL); 705 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 706 &type); 707 if (retval_socket != 0) 708 return (retval_socket); 709 domain = linux_to_bsd_domain(args->domain); 710 if (domain == -1) 711 return (EAFNOSUPPORT); 712 713 retval_socket = kern_socket(td, domain, type, args->protocol); 714 if (retval_socket) 715 return (retval_socket); 716 717 if (type == SOCK_RAW 718 && (args->protocol == IPPROTO_RAW || args->protocol == 0) 719 && domain == PF_INET) { 720 /* It's a raw IP socket: set the IP_HDRINCL option. */ 721 int hdrincl; 722 723 hdrincl = 1; 724 /* We ignore any error returned by kern_setsockopt() */ 725 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 726 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 727 } 728#ifdef INET6 729 /* 730 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 731 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 732 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 733 * sysctl value. 734 */ 735 if (domain == PF_INET6) { 736 int v6only; 737 738 v6only = 0; 739 /* We ignore any error returned by setsockopt() */ 740 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 741 &v6only, UIO_SYSSPACE, sizeof(v6only)); 742 } 743#endif 744 745 return (retval_socket); 746} 747 748int 749linux_bind(struct thread *td, struct linux_bind_args *args) 750{ 751 struct sockaddr *sa; 752 int error; 753 754 error = linux_getsockaddr(&sa, PTRIN(args->name), 755 args->namelen); 756 if (error != 0) 757 return (error); 758 759 error = kern_bindat(td, AT_FDCWD, args->s, sa); 760 free(sa, M_SONAME); 761 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 762 return (EINVAL); 763 return (error); 764} 765 766int 767linux_connect(struct thread *td, struct linux_connect_args *args) 768{ 769 cap_rights_t rights; 770 struct socket *so; 771 struct sockaddr *sa; 772 struct file *fp; 773 u_int fflag; 774 int error; 775 776 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), 777 args->namelen); 778 if (error != 0) 779 return (error); 780 781 error = kern_connectat(td, AT_FDCWD, args->s, sa); 782 free(sa, M_SONAME); 783 if (error != EISCONN) 784 return (error); 785 786 /* 787 * Linux doesn't return EISCONN the first time it occurs, 788 * when on a non-blocking socket. Instead it returns the 789 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 790 */ 791 error = getsock_cap(td, args->s, cap_rights_init(&rights, CAP_CONNECT), 792 &fp, &fflag, NULL); 793 if (error != 0) 794 return (error); 795 796 error = EISCONN; 797 so = fp->f_data; 798 if (fflag & FNONBLOCK) { 799 SOCK_LOCK(so); 800 if (so->so_emuldata == 0) 801 error = so->so_error; 802 so->so_emuldata = (void *)1; 803 SOCK_UNLOCK(so); 804 } 805 fdrop(fp, td); 806 807 return (error); 808} 809 810int 811linux_listen(struct thread *td, struct linux_listen_args *args) 812{ 813 814 return (kern_listen(td, args->s, args->backlog)); 815} 816 817static int 818linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 819 l_uintptr_t namelen, int flags) 820{ 821 struct accept4_args /* { 822 int s; 823 struct sockaddr * __restrict name; 824 socklen_t * __restrict anamelen; 825 int flags; 826 } */ bsd_args; 827 cap_rights_t rights; 828 struct socket *so; 829 struct file *fp; 830 int error, error1; 831 832 bsd_args.s = s; 833 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); 834 bsd_args.anamelen = PTRIN(namelen); 835 bsd_args.flags = 0; 836 error = linux_set_socket_flags(flags, &bsd_args.flags); 837 if (error != 0) 838 return (error); 839 error = sys_accept4(td, &bsd_args); 840 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); 841 if (error != 0) { 842 if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) 843 return (EINVAL); 844 if (error == EINVAL) { 845 error1 = getsock_cap(td, s, 846 cap_rights_init(&rights, CAP_ACCEPT), &fp, NULL, NULL); 847 if (error1 != 0) 848 return (error1); 849 so = fp->f_data; 850 if (so->so_type == SOCK_DGRAM) { 851 fdrop(fp, td); 852 return (EOPNOTSUPP); 853 } 854 fdrop(fp, td); 855 } 856 return (error); 857 } 858 if (addr) 859 error = linux_sa_put(PTRIN(addr)); 860 if (error != 0) { 861 (void)kern_close(td, td->td_retval[0]); 862 td->td_retval[0] = 0; 863 } 864 return (error); 865} 866 867int 868linux_accept(struct thread *td, struct linux_accept_args *args) 869{ 870 871 return (linux_accept_common(td, args->s, args->addr, 872 args->namelen, 0)); 873} 874 875int 876linux_accept4(struct thread *td, struct linux_accept4_args *args) 877{ 878 879 return (linux_accept_common(td, args->s, args->addr, 880 args->namelen, args->flags)); 881} 882 883int 884linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 885{ 886 struct getsockname_args /* { 887 int fdes; 888 struct sockaddr * __restrict asa; 889 socklen_t * __restrict alen; 890 } */ bsd_args; 891 int error; 892 893 bsd_args.fdes = args->s; 894 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); 895 bsd_args.alen = PTRIN(args->namelen); 896 error = sys_getsockname(td, &bsd_args); 897 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 898 if (error != 0) 899 return (error); 900 return (linux_sa_put(PTRIN(args->addr))); 901} 902 903int 904linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 905{ 906 struct getpeername_args /* { 907 int fdes; 908 caddr_t asa; 909 int *alen; 910 } */ bsd_args; 911 int error; 912 913 bsd_args.fdes = args->s; 914 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); 915 bsd_args.alen = (socklen_t *)PTRIN(args->namelen); 916 error = sys_getpeername(td, &bsd_args); 917 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 918 if (error != 0) 919 return (error); 920 return (linux_sa_put(PTRIN(args->addr))); 921} 922 923int 924linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 925{ 926 struct socketpair_args /* { 927 int domain; 928 int type; 929 int protocol; 930 int *rsv; 931 } */ bsd_args; 932 int error; 933 934 bsd_args.domain = linux_to_bsd_domain(args->domain); 935 if (bsd_args.domain != PF_LOCAL) 936 return (EAFNOSUPPORT); 937 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 938 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 939 return (EINVAL); 940 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 941 &bsd_args.type); 942 if (error != 0) 943 return (error); 944 if (args->protocol != 0 && args->protocol != PF_UNIX) 945 946 /* 947 * Use of PF_UNIX as protocol argument is not right, 948 * but Linux does it. 949 * Do not map PF_UNIX as its Linux value is identical 950 * to FreeBSD one. 951 */ 952 return (EPROTONOSUPPORT); 953 else 954 bsd_args.protocol = 0; 955 bsd_args.rsv = (int *)PTRIN(args->rsv); 956 return (sys_socketpair(td, &bsd_args)); 957} 958 959#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 960struct linux_send_args { 961 register_t s; 962 register_t msg; 963 register_t len; 964 register_t flags; 965}; 966 967static int 968linux_send(struct thread *td, struct linux_send_args *args) 969{ 970 struct sendto_args /* { 971 int s; 972 caddr_t buf; 973 int len; 974 int flags; 975 caddr_t to; 976 int tolen; 977 } */ bsd_args; 978 979 bsd_args.s = args->s; 980 bsd_args.buf = (caddr_t)PTRIN(args->msg); 981 bsd_args.len = args->len; 982 bsd_args.flags = args->flags; 983 bsd_args.to = NULL; 984 bsd_args.tolen = 0; 985 return (sys_sendto(td, &bsd_args)); 986} 987 988struct linux_recv_args { 989 register_t s; 990 register_t msg; 991 register_t len; 992 register_t flags; 993}; 994 995static int 996linux_recv(struct thread *td, struct linux_recv_args *args) 997{ 998 struct recvfrom_args /* { 999 int s; 1000 caddr_t buf; 1001 int len; 1002 int flags; 1003 struct sockaddr *from; 1004 socklen_t fromlenaddr; 1005 } */ bsd_args; 1006 1007 bsd_args.s = args->s; 1008 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1009 bsd_args.len = args->len; 1010 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1011 bsd_args.from = NULL; 1012 bsd_args.fromlenaddr = 0; 1013 return (sys_recvfrom(td, &bsd_args)); 1014} 1015#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1016 1017int 1018linux_sendto(struct thread *td, struct linux_sendto_args *args) 1019{ 1020 struct msghdr msg; 1021 struct iovec aiov; 1022 1023 if (linux_check_hdrincl(td, args->s) == 0) 1024 /* IP_HDRINCL set, tweak the packet before sending */ 1025 return (linux_sendto_hdrincl(td, args)); 1026 1027 msg.msg_name = PTRIN(args->to); 1028 msg.msg_namelen = args->tolen; 1029 msg.msg_iov = &aiov; 1030 msg.msg_iovlen = 1; 1031 msg.msg_control = NULL; 1032 msg.msg_flags = 0; 1033 aiov.iov_base = PTRIN(args->msg); 1034 aiov.iov_len = args->len; 1035 return (linux_sendit(td, args->s, &msg, args->flags, NULL, 1036 UIO_USERSPACE)); 1037} 1038 1039int 1040linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1041{ 1042 struct msghdr msg; 1043 struct iovec aiov; 1044 int error, fromlen; 1045 1046 if (PTRIN(args->fromlen) != NULL) { 1047 error = copyin(PTRIN(args->fromlen), &fromlen, 1048 sizeof(fromlen)); 1049 if (error != 0) 1050 return (error); 1051 if (fromlen < 0) 1052 return (EINVAL); 1053 msg.msg_namelen = fromlen; 1054 } else 1055 msg.msg_namelen = 0; 1056 1057 msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from); 1058 msg.msg_iov = &aiov; 1059 msg.msg_iovlen = 1; 1060 aiov.iov_base = PTRIN(args->buf); 1061 aiov.iov_len = args->len; 1062 msg.msg_control = 0; 1063 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1064 1065 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL); 1066 if (error != 0) 1067 return (error); 1068 1069 if (PTRIN(args->from) != NULL) { 1070 error = bsd_to_linux_sockaddr((struct sockaddr *) 1071 PTRIN(args->from)); 1072 if (error != 0) 1073 return (error); 1074 1075 error = linux_sa_put((struct osockaddr *) 1076 PTRIN(args->from)); 1077 } 1078 1079 if (PTRIN(args->fromlen) != NULL) 1080 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1081 sizeof(msg.msg_namelen)); 1082 1083 return (error); 1084} 1085 1086static int 1087linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1088 l_uint flags) 1089{ 1090 struct cmsghdr *cmsg; 1091 struct cmsgcred cmcred; 1092 struct mbuf *control; 1093 struct msghdr msg; 1094 struct l_cmsghdr linux_cmsg; 1095 struct l_cmsghdr *ptr_cmsg; 1096 struct l_msghdr linux_msg; 1097 struct iovec *iov; 1098 socklen_t datalen; 1099 struct sockaddr *sa; 1100 sa_family_t sa_family; 1101 void *data; 1102 int error; 1103 1104 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1105 if (error != 0) 1106 return (error); 1107 1108 /* 1109 * Some Linux applications (ping) define a non-NULL control data 1110 * pointer, but a msg_controllen of 0, which is not allowed in the 1111 * FreeBSD system call interface. NULL the msg_control pointer in 1112 * order to handle this case. This should be checked, but allows the 1113 * Linux ping to work. 1114 */ 1115 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) 1116 linux_msg.msg_control = PTROUT(NULL); 1117 1118 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1119 if (error != 0) 1120 return (error); 1121 1122#ifdef COMPAT_LINUX32 1123 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1124 &iov, EMSGSIZE); 1125#else 1126 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1127#endif 1128 if (error != 0) 1129 return (error); 1130 1131 control = NULL; 1132 cmsg = NULL; 1133 1134 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { 1135 error = kern_getsockname(td, s, &sa, &datalen); 1136 if (error != 0) 1137 goto bad; 1138 sa_family = sa->sa_family; 1139 free(sa, M_SONAME); 1140 1141 error = ENOBUFS; 1142 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO); 1143 control = m_get(M_WAITOK, MT_CONTROL); 1144 1145 do { 1146 error = copyin(ptr_cmsg, &linux_cmsg, 1147 sizeof(struct l_cmsghdr)); 1148 if (error != 0) 1149 goto bad; 1150 1151 error = EINVAL; 1152 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) 1153 goto bad; 1154 1155 /* 1156 * Now we support only SCM_RIGHTS and SCM_CRED, 1157 * so return EINVAL in any other cmsg_type 1158 */ 1159 cmsg->cmsg_type = 1160 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1161 cmsg->cmsg_level = 1162 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1163 if (cmsg->cmsg_type == -1 1164 || cmsg->cmsg_level != SOL_SOCKET) 1165 goto bad; 1166 1167 /* 1168 * Some applications (e.g. pulseaudio) attempt to 1169 * send ancillary data even if the underlying protocol 1170 * doesn't support it which is not allowed in the 1171 * FreeBSD system call interface. 1172 */ 1173 if (sa_family != AF_UNIX) 1174 continue; 1175 1176 data = LINUX_CMSG_DATA(ptr_cmsg); 1177 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1178 1179 switch (cmsg->cmsg_type) 1180 { 1181 case SCM_RIGHTS: 1182 break; 1183 1184 case SCM_CREDS: 1185 data = &cmcred; 1186 datalen = sizeof(cmcred); 1187 1188 /* 1189 * The lower levels will fill in the structure 1190 */ 1191 bzero(data, datalen); 1192 break; 1193 } 1194 1195 cmsg->cmsg_len = CMSG_LEN(datalen); 1196 1197 error = ENOBUFS; 1198 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg)) 1199 goto bad; 1200 if (!m_append(control, datalen, (c_caddr_t)data)) 1201 goto bad; 1202 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); 1203 1204 if (m_length(control, NULL) == 0) { 1205 m_freem(control); 1206 control = NULL; 1207 } 1208 } 1209 1210 msg.msg_iov = iov; 1211 msg.msg_flags = 0; 1212 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1213 control = NULL; 1214 1215bad: 1216 m_freem(control); 1217 free(iov, M_IOV); 1218 if (cmsg) 1219 free(cmsg, M_LINUX); 1220 return (error); 1221} 1222 1223int 1224linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1225{ 1226 1227 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1228 args->flags)); 1229} 1230 1231int 1232linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1233{ 1234 struct l_mmsghdr *msg; 1235 l_uint retval; 1236 int error, datagrams; 1237 1238 if (args->vlen > UIO_MAXIOV) 1239 args->vlen = UIO_MAXIOV; 1240 1241 msg = PTRIN(args->msg); 1242 datagrams = 0; 1243 while (datagrams < args->vlen) { 1244 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1245 args->flags); 1246 if (error != 0) 1247 break; 1248 1249 retval = td->td_retval[0]; 1250 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1251 if (error != 0) 1252 break; 1253 ++msg; 1254 ++datagrams; 1255 } 1256 if (error == 0) 1257 td->td_retval[0] = datagrams; 1258 return (error); 1259} 1260 1261static int 1262linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1263 l_uint flags, struct msghdr *msg) 1264{ 1265 struct cmsghdr *cm; 1266 struct cmsgcred *cmcred; 1267 struct l_cmsghdr *linux_cmsg = NULL; 1268 struct l_ucred linux_ucred; 1269 socklen_t datalen, outlen; 1270 struct l_msghdr linux_msg; 1271 struct iovec *iov, *uiov; 1272 struct mbuf *control = NULL; 1273 struct mbuf **controlp; 1274 struct timeval *ftmvl; 1275 l_timeval ltmvl; 1276 caddr_t outbuf; 1277 void *data; 1278 int error, i, fd, fds, *fdp; 1279 1280 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1281 if (error != 0) 1282 return (error); 1283 1284 error = linux_to_bsd_msghdr(msg, &linux_msg); 1285 if (error != 0) 1286 return (error); 1287 1288#ifdef COMPAT_LINUX32 1289 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1290 &iov, EMSGSIZE); 1291#else 1292 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1293#endif 1294 if (error != 0) 1295 return (error); 1296 1297 if (msg->msg_name) { 1298 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name, 1299 msg->msg_namelen); 1300 if (error != 0) 1301 goto bad; 1302 } 1303 1304 uiov = msg->msg_iov; 1305 msg->msg_iov = iov; 1306 controlp = (msg->msg_control != NULL) ? &control : NULL; 1307 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp); 1308 msg->msg_iov = uiov; 1309 if (error != 0) 1310 goto bad; 1311 1312 error = bsd_to_linux_msghdr(msg, &linux_msg); 1313 if (error != 0) 1314 goto bad; 1315 1316 if (linux_msg.msg_name) { 1317 error = bsd_to_linux_sockaddr((struct sockaddr *) 1318 PTRIN(linux_msg.msg_name)); 1319 if (error != 0) 1320 goto bad; 1321 } 1322 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1323 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1324 if (error != 0) 1325 goto bad; 1326 } 1327 1328 outbuf = PTRIN(linux_msg.msg_control); 1329 outlen = 0; 1330 1331 if (control) { 1332 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1333 1334 msg->msg_control = mtod(control, struct cmsghdr *); 1335 msg->msg_controllen = control->m_len; 1336 1337 cm = CMSG_FIRSTHDR(msg); 1338 1339 while (cm != NULL) { 1340 linux_cmsg->cmsg_type = 1341 bsd_to_linux_cmsg_type(cm->cmsg_type); 1342 linux_cmsg->cmsg_level = 1343 bsd_to_linux_sockopt_level(cm->cmsg_level); 1344 if (linux_cmsg->cmsg_type == -1 1345 || cm->cmsg_level != SOL_SOCKET) 1346 { 1347 error = EINVAL; 1348 goto bad; 1349 } 1350 1351 data = CMSG_DATA(cm); 1352 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1353 1354 switch (cm->cmsg_type) 1355 { 1356 case SCM_RIGHTS: 1357 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1358 fds = datalen / sizeof(int); 1359 fdp = data; 1360 for (i = 0; i < fds; i++) { 1361 fd = *fdp++; 1362 (void)kern_fcntl(td, fd, 1363 F_SETFD, FD_CLOEXEC); 1364 } 1365 } 1366 break; 1367 1368 case SCM_CREDS: 1369 /* 1370 * Currently LOCAL_CREDS is never in 1371 * effect for Linux so no need to worry 1372 * about sockcred 1373 */ 1374 if (datalen != sizeof(*cmcred)) { 1375 error = EMSGSIZE; 1376 goto bad; 1377 } 1378 cmcred = (struct cmsgcred *)data; 1379 bzero(&linux_ucred, sizeof(linux_ucred)); 1380 linux_ucred.pid = cmcred->cmcred_pid; 1381 linux_ucred.uid = cmcred->cmcred_uid; 1382 linux_ucred.gid = cmcred->cmcred_gid; 1383 data = &linux_ucred; 1384 datalen = sizeof(linux_ucred); 1385 break; 1386 1387 case SCM_TIMESTAMP: 1388 if (datalen != sizeof(struct timeval)) { 1389 error = EMSGSIZE; 1390 goto bad; 1391 } 1392 ftmvl = (struct timeval *)data; 1393 ltmvl.tv_sec = ftmvl->tv_sec; 1394 ltmvl.tv_usec = ftmvl->tv_usec; 1395 data = <mvl; 1396 datalen = sizeof(ltmvl); 1397 break; 1398 } 1399 1400 if (outlen + LINUX_CMSG_LEN(datalen) > 1401 linux_msg.msg_controllen) { 1402 if (outlen == 0) { 1403 error = EMSGSIZE; 1404 goto bad; 1405 } else { 1406 linux_msg.msg_flags |= 1407 LINUX_MSG_CTRUNC; 1408 goto out; 1409 } 1410 } 1411 1412 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1413 1414 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1415 if (error != 0) 1416 goto bad; 1417 outbuf += L_CMSG_HDRSZ; 1418 1419 error = copyout(data, outbuf, datalen); 1420 if (error != 0) 1421 goto bad; 1422 1423 outbuf += LINUX_CMSG_ALIGN(datalen); 1424 outlen += LINUX_CMSG_LEN(datalen); 1425 1426 cm = CMSG_NXTHDR(msg, cm); 1427 } 1428 } 1429 1430out: 1431 linux_msg.msg_controllen = outlen; 1432 error = copyout(&linux_msg, msghdr, sizeof(linux_msg)); 1433 1434bad: 1435 free(iov, M_IOV); 1436 m_freem(control); 1437 free(linux_cmsg, M_LINUX); 1438 1439 return (error); 1440} 1441 1442int 1443linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1444{ 1445 struct msghdr bsd_msg; 1446 1447 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1448 args->flags, &bsd_msg)); 1449} 1450 1451int 1452linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1453{ 1454 struct l_mmsghdr *msg; 1455 struct msghdr bsd_msg; 1456 struct l_timespec lts; 1457 struct timespec ts, tts; 1458 l_uint retval; 1459 int error, datagrams; 1460 1461 if (args->timeout) { 1462 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1463 if (error != 0) 1464 return (error); 1465 error = linux_to_native_timespec(&ts, <s); 1466 if (error != 0) 1467 return (error); 1468 getnanotime(&tts); 1469 timespecadd(&tts, &ts); 1470 } 1471 1472 msg = PTRIN(args->msg); 1473 datagrams = 0; 1474 while (datagrams < args->vlen) { 1475 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1476 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1477 if (error != 0) 1478 break; 1479 1480 retval = td->td_retval[0]; 1481 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1482 if (error != 0) 1483 break; 1484 ++msg; 1485 ++datagrams; 1486 1487 /* 1488 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1489 */ 1490 if (args->flags & LINUX_MSG_WAITFORONE) 1491 args->flags |= LINUX_MSG_DONTWAIT; 1492 1493 /* 1494 * See BUGS section of recvmmsg(2). 1495 */ 1496 if (args->timeout) { 1497 getnanotime(&ts); 1498 timespecsub(&ts, &tts); 1499 if (!timespecisset(&ts) || ts.tv_sec > 0) 1500 break; 1501 } 1502 /* Out of band data, return right away. */ 1503 if (bsd_msg.msg_flags & MSG_OOB) 1504 break; 1505 } 1506 if (error == 0) 1507 td->td_retval[0] = datagrams; 1508 return (error); 1509} 1510 1511int 1512linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1513{ 1514 1515 return (kern_shutdown(td, args->s, args->how)); 1516} 1517 1518int 1519linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1520{ 1521 struct setsockopt_args /* { 1522 int s; 1523 int level; 1524 int name; 1525 caddr_t val; 1526 int valsize; 1527 } */ bsd_args; 1528 l_timeval linux_tv; 1529 struct timeval tv; 1530 int error, name; 1531 1532 bsd_args.s = args->s; 1533 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1534 switch (bsd_args.level) { 1535 case SOL_SOCKET: 1536 name = linux_to_bsd_so_sockopt(args->optname); 1537 switch (name) { 1538 case SO_RCVTIMEO: 1539 /* FALLTHROUGH */ 1540 case SO_SNDTIMEO: 1541 error = copyin(PTRIN(args->optval), &linux_tv, 1542 sizeof(linux_tv)); 1543 if (error != 0) 1544 return (error); 1545 tv.tv_sec = linux_tv.tv_sec; 1546 tv.tv_usec = linux_tv.tv_usec; 1547 return (kern_setsockopt(td, args->s, bsd_args.level, 1548 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1549 /* NOTREACHED */ 1550 break; 1551 default: 1552 break; 1553 } 1554 break; 1555 case IPPROTO_IP: 1556 name = linux_to_bsd_ip_sockopt(args->optname); 1557 break; 1558 case IPPROTO_IPV6: 1559 name = linux_to_bsd_ip6_sockopt(args->optname); 1560 break; 1561 case IPPROTO_TCP: 1562 name = linux_to_bsd_tcp_sockopt(args->optname); 1563 break; 1564 default: 1565 name = -1; 1566 break; 1567 } 1568 if (name == -1) 1569 return (ENOPROTOOPT); 1570 1571 bsd_args.name = name; 1572 bsd_args.val = PTRIN(args->optval); 1573 bsd_args.valsize = args->optlen; 1574 1575 if (name == IPV6_NEXTHOP) { 1576 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1577 bsd_args.valsize); 1578 error = sys_setsockopt(td, &bsd_args); 1579 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1580 } else 1581 error = sys_setsockopt(td, &bsd_args); 1582 1583 return (error); 1584} 1585 1586int 1587linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1588{ 1589 struct getsockopt_args /* { 1590 int s; 1591 int level; 1592 int name; 1593 caddr_t val; 1594 int *avalsize; 1595 } */ bsd_args; 1596 l_timeval linux_tv; 1597 struct timeval tv; 1598 socklen_t tv_len, xulen, len; 1599 struct xucred xu; 1600 struct l_ucred lxu; 1601 int error, name, newval; 1602 1603 bsd_args.s = args->s; 1604 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1605 switch (bsd_args.level) { 1606 case SOL_SOCKET: 1607 name = linux_to_bsd_so_sockopt(args->optname); 1608 switch (name) { 1609 case SO_RCVTIMEO: 1610 /* FALLTHROUGH */ 1611 case SO_SNDTIMEO: 1612 tv_len = sizeof(tv); 1613 error = kern_getsockopt(td, args->s, bsd_args.level, 1614 name, &tv, UIO_SYSSPACE, &tv_len); 1615 if (error != 0) 1616 return (error); 1617 linux_tv.tv_sec = tv.tv_sec; 1618 linux_tv.tv_usec = tv.tv_usec; 1619 return (copyout(&linux_tv, PTRIN(args->optval), 1620 sizeof(linux_tv))); 1621 /* NOTREACHED */ 1622 break; 1623 case LOCAL_PEERCRED: 1624 if (args->optlen != sizeof(lxu)) 1625 return (EINVAL); 1626 xulen = sizeof(xu); 1627 error = kern_getsockopt(td, args->s, bsd_args.level, 1628 name, &xu, UIO_SYSSPACE, &xulen); 1629 if (error != 0) 1630 return (error); 1631 /* 1632 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1633 */ 1634 lxu.pid = 0; 1635 lxu.uid = xu.cr_uid; 1636 lxu.gid = xu.cr_gid; 1637 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1638 /* NOTREACHED */ 1639 break; 1640 case SO_ERROR: 1641 len = sizeof(newval); 1642 error = kern_getsockopt(td, args->s, bsd_args.level, 1643 name, &newval, UIO_SYSSPACE, &len); 1644 if (error != 0) 1645 return (error); 1646 newval = -SV_ABI_ERRNO(td->td_proc, newval); 1647 return (copyout(&newval, PTRIN(args->optval), len)); 1648 /* NOTREACHED */ 1649 default: 1650 break; 1651 } 1652 break; 1653 case IPPROTO_IP: 1654 name = linux_to_bsd_ip_sockopt(args->optname); 1655 break; 1656 case IPPROTO_IPV6: 1657 name = linux_to_bsd_ip6_sockopt(args->optname); 1658 break; 1659 case IPPROTO_TCP: 1660 name = linux_to_bsd_tcp_sockopt(args->optname); 1661 break; 1662 default: 1663 name = -1; 1664 break; 1665 } 1666 if (name == -1) 1667 return (EINVAL); 1668 1669 bsd_args.name = name; 1670 bsd_args.val = PTRIN(args->optval); 1671 bsd_args.avalsize = PTRIN(args->optlen); 1672 1673 if (name == IPV6_NEXTHOP) { 1674 error = sys_getsockopt(td, &bsd_args); 1675 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1676 } else 1677 error = sys_getsockopt(td, &bsd_args); 1678 1679 return (error); 1680} 1681 1682#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1683 1684/* Argument list sizes for linux_socketcall */ 1685static const unsigned char lxs_args_cnt[] = { 1686 0 /* unused*/, 3 /* socket */, 1687 3 /* bind */, 3 /* connect */, 1688 2 /* listen */, 3 /* accept */, 1689 3 /* getsockname */, 3 /* getpeername */, 1690 4 /* socketpair */, 4 /* send */, 1691 4 /* recv */, 6 /* sendto */, 1692 6 /* recvfrom */, 2 /* shutdown */, 1693 5 /* setsockopt */, 5 /* getsockopt */, 1694 3 /* sendmsg */, 3 /* recvmsg */, 1695 4 /* accept4 */, 5 /* recvmmsg */, 1696 4 /* sendmmsg */ 1697}; 1698#define LINUX_ARGS_CNT (nitems(lxs_args_cnt) - 1) 1699#define LINUX_ARG_SIZE(x) (lxs_args_cnt[x] * sizeof(l_ulong)) 1700 1701int 1702linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1703{ 1704 l_ulong a[6]; 1705#if defined(__amd64__) && defined(COMPAT_LINUX32) 1706 register_t l_args[6]; 1707#endif 1708 void *arg; 1709 int error; 1710 1711 if (args->what < LINUX_SOCKET || args->what > LINUX_ARGS_CNT) 1712 return (EINVAL); 1713 error = copyin(PTRIN(args->args), a, LINUX_ARG_SIZE(args->what)); 1714 if (error != 0) 1715 return (error); 1716 1717#if defined(__amd64__) && defined(COMPAT_LINUX32) 1718 for (int i = 0; i < lxs_args_cnt[args->what]; ++i) 1719 l_args[i] = a[i]; 1720 arg = l_args; 1721#else 1722 arg = a; 1723#endif 1724 switch (args->what) { 1725 case LINUX_SOCKET: 1726 return (linux_socket(td, arg)); 1727 case LINUX_BIND: 1728 return (linux_bind(td, arg)); 1729 case LINUX_CONNECT: 1730 return (linux_connect(td, arg)); 1731 case LINUX_LISTEN: 1732 return (linux_listen(td, arg)); 1733 case LINUX_ACCEPT: 1734 return (linux_accept(td, arg)); 1735 case LINUX_GETSOCKNAME: 1736 return (linux_getsockname(td, arg)); 1737 case LINUX_GETPEERNAME: 1738 return (linux_getpeername(td, arg)); 1739 case LINUX_SOCKETPAIR: 1740 return (linux_socketpair(td, arg)); 1741 case LINUX_SEND: 1742 return (linux_send(td, arg)); 1743 case LINUX_RECV: 1744 return (linux_recv(td, arg)); 1745 case LINUX_SENDTO: 1746 return (linux_sendto(td, arg)); 1747 case LINUX_RECVFROM: 1748 return (linux_recvfrom(td, arg)); 1749 case LINUX_SHUTDOWN: 1750 return (linux_shutdown(td, arg)); 1751 case LINUX_SETSOCKOPT: 1752 return (linux_setsockopt(td, arg)); 1753 case LINUX_GETSOCKOPT: 1754 return (linux_getsockopt(td, arg)); 1755 case LINUX_SENDMSG: 1756 return (linux_sendmsg(td, arg)); 1757 case LINUX_RECVMSG: 1758 return (linux_recvmsg(td, arg)); 1759 case LINUX_ACCEPT4: 1760 return (linux_accept4(td, arg)); 1761 case LINUX_RECVMMSG: 1762 return (linux_recvmmsg(td, arg)); 1763 case LINUX_SENDMMSG: 1764 return (linux_sendmmsg(td, arg)); 1765 } 1766 1767 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1768 return (ENOSYS); 1769} 1770#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1771