1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1995 Søren Schmidt 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 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/filedesc.h> 44 #include <sys/limits.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/mutex.h> 48 #include <sys/mbuf.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/syscallsubr.h> 52 #include <sys/uio.h> 53 #include <sys/stat.h> 54 #include <sys/syslog.h> 55 #include <sys/un.h> 56 #include <sys/unistd.h> 57 58 #include <security/audit/audit.h> 59 60 #include <net/if.h> 61 #include <net/vnet.h> 62 #include <netinet/in.h> 63 #include <netinet/in_systm.h> 64 #include <netinet/ip.h> 65 #include <netinet/tcp.h> 66 #ifdef INET6 67 #include <netinet/ip6.h> 68 #include <netinet6/ip6_var.h> 69 #endif 70 71 #ifdef COMPAT_LINUX32 72 #include <machine/../linux32/linux.h> 73 #include <machine/../linux32/linux32_proto.h> 74 #else 75 #include <machine/../linux/linux.h> 76 #include <machine/../linux/linux_proto.h> 77 #endif 78 #include <compat/linux/linux_common.h> 79 #include <compat/linux/linux_file.h> 80 #include <compat/linux/linux_mib.h> 81 #include <compat/linux/linux_socket.h> 82 #include <compat/linux/linux_timer.h> 83 #include <compat/linux/linux_util.h> 84 85 static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *, 86 l_uint); 87 static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *, 88 l_uint, struct msghdr *); 89 static int linux_set_socket_flags(int, int *); 90 91 92 static int 93 linux_to_bsd_sockopt_level(int level) 94 { 95 96 if (level == LINUX_SOL_SOCKET) 97 return (SOL_SOCKET); 98 /* Remaining values are RFC-defined protocol numbers. */ 99 return (level); 100 } 101 102 static int 103 bsd_to_linux_sockopt_level(int level) 104 { 105 106 if (level == SOL_SOCKET) 107 return (LINUX_SOL_SOCKET); 108 return (level); 109 } 110 111 static int 112 linux_to_bsd_ip_sockopt(int opt) 113 { 114 115 switch (opt) { 116 case LINUX_IP_TOS: 117 return (IP_TOS); 118 case LINUX_IP_TTL: 119 return (IP_TTL); 120 case LINUX_IP_OPTIONS: 121 return (IP_OPTIONS); 122 case LINUX_IP_MULTICAST_IF: 123 return (IP_MULTICAST_IF); 124 case LINUX_IP_MULTICAST_TTL: 125 return (IP_MULTICAST_TTL); 126 case LINUX_IP_MULTICAST_LOOP: 127 return (IP_MULTICAST_LOOP); 128 case LINUX_IP_ADD_MEMBERSHIP: 129 return (IP_ADD_MEMBERSHIP); 130 case LINUX_IP_DROP_MEMBERSHIP: 131 return (IP_DROP_MEMBERSHIP); 132 case LINUX_IP_HDRINCL: 133 return (IP_HDRINCL); 134 } 135 return (-1); 136 } 137 138 static int 139 linux_to_bsd_ip6_sockopt(int opt) 140 { 141 142 switch (opt) { 143 case LINUX_IPV6_NEXTHOP: 144 return (IPV6_NEXTHOP); 145 case LINUX_IPV6_UNICAST_HOPS: 146 return (IPV6_UNICAST_HOPS); 147 case LINUX_IPV6_MULTICAST_IF: 148 return (IPV6_MULTICAST_IF); 149 case LINUX_IPV6_MULTICAST_HOPS: 150 return (IPV6_MULTICAST_HOPS); 151 case LINUX_IPV6_MULTICAST_LOOP: 152 return (IPV6_MULTICAST_LOOP); 153 case LINUX_IPV6_ADD_MEMBERSHIP: 154 return (IPV6_JOIN_GROUP); 155 case LINUX_IPV6_DROP_MEMBERSHIP: 156 return (IPV6_LEAVE_GROUP); 157 case LINUX_IPV6_V6ONLY: 158 return (IPV6_V6ONLY); 159 case LINUX_IPV6_DONTFRAG: 160 return (IPV6_DONTFRAG); 161 #if 0 162 case LINUX_IPV6_CHECKSUM: 163 return (IPV6_CHECKSUM); 164 case LINUX_IPV6_RECVPKTINFO: 165 return (IPV6_RECVPKTINFO); 166 case LINUX_IPV6_PKTINFO: 167 return (IPV6_PKTINFO); 168 case LINUX_IPV6_RECVHOPLIMIT: 169 return (IPV6_RECVHOPLIMIT); 170 case LINUX_IPV6_HOPLIMIT: 171 return (IPV6_HOPLIMIT); 172 case LINUX_IPV6_RECVHOPOPTS: 173 return (IPV6_RECVHOPOPTS); 174 case LINUX_IPV6_HOPOPTS: 175 return (IPV6_HOPOPTS); 176 case LINUX_IPV6_RTHDRDSTOPTS: 177 return (IPV6_RTHDRDSTOPTS); 178 case LINUX_IPV6_RECVRTHDR: 179 return (IPV6_RECVRTHDR); 180 case LINUX_IPV6_RTHDR: 181 return (IPV6_RTHDR); 182 case LINUX_IPV6_RECVDSTOPTS: 183 return (IPV6_RECVDSTOPTS); 184 case LINUX_IPV6_DSTOPTS: 185 return (IPV6_DSTOPTS); 186 case LINUX_IPV6_RECVPATHMTU: 187 return (IPV6_RECVPATHMTU); 188 case LINUX_IPV6_PATHMTU: 189 return (IPV6_PATHMTU); 190 #endif 191 } 192 return (-1); 193 } 194 195 static int 196 linux_to_bsd_so_sockopt(int opt) 197 { 198 199 switch (opt) { 200 case LINUX_SO_DEBUG: 201 return (SO_DEBUG); 202 case LINUX_SO_REUSEADDR: 203 return (SO_REUSEADDR); 204 case LINUX_SO_TYPE: 205 return (SO_TYPE); 206 case LINUX_SO_ERROR: 207 return (SO_ERROR); 208 case LINUX_SO_DONTROUTE: 209 return (SO_DONTROUTE); 210 case LINUX_SO_BROADCAST: 211 return (SO_BROADCAST); 212 case LINUX_SO_SNDBUF: 213 case LINUX_SO_SNDBUFFORCE: 214 return (SO_SNDBUF); 215 case LINUX_SO_RCVBUF: 216 case LINUX_SO_RCVBUFFORCE: 217 return (SO_RCVBUF); 218 case LINUX_SO_KEEPALIVE: 219 return (SO_KEEPALIVE); 220 case LINUX_SO_OOBINLINE: 221 return (SO_OOBINLINE); 222 case LINUX_SO_LINGER: 223 return (SO_LINGER); 224 case LINUX_SO_REUSEPORT: 225 return (SO_REUSEPORT_LB); 226 case LINUX_SO_PEERCRED: 227 return (LOCAL_PEERCRED); 228 case LINUX_SO_RCVLOWAT: 229 return (SO_RCVLOWAT); 230 case LINUX_SO_SNDLOWAT: 231 return (SO_SNDLOWAT); 232 case LINUX_SO_RCVTIMEO: 233 return (SO_RCVTIMEO); 234 case LINUX_SO_SNDTIMEO: 235 return (SO_SNDTIMEO); 236 case LINUX_SO_TIMESTAMP: 237 return (SO_TIMESTAMP); 238 case LINUX_SO_ACCEPTCONN: 239 return (SO_ACCEPTCONN); 240 case LINUX_SO_PROTOCOL: 241 return (SO_PROTOCOL); 242 } 243 return (-1); 244 } 245 246 static int 247 linux_to_bsd_tcp_sockopt(int opt) 248 { 249 250 switch (opt) { 251 case LINUX_TCP_NODELAY: 252 return (TCP_NODELAY); 253 case LINUX_TCP_MAXSEG: 254 return (TCP_MAXSEG); 255 case LINUX_TCP_CORK: 256 return (TCP_NOPUSH); 257 case LINUX_TCP_KEEPIDLE: 258 return (TCP_KEEPIDLE); 259 case LINUX_TCP_KEEPINTVL: 260 return (TCP_KEEPINTVL); 261 case LINUX_TCP_KEEPCNT: 262 return (TCP_KEEPCNT); 263 case LINUX_TCP_MD5SIG: 264 return (TCP_MD5SIG); 265 } 266 return (-1); 267 } 268 269 static int 270 linux_to_bsd_msg_flags(int flags) 271 { 272 int ret_flags = 0; 273 274 if (flags & LINUX_MSG_OOB) 275 ret_flags |= MSG_OOB; 276 if (flags & LINUX_MSG_PEEK) 277 ret_flags |= MSG_PEEK; 278 if (flags & LINUX_MSG_DONTROUTE) 279 ret_flags |= MSG_DONTROUTE; 280 if (flags & LINUX_MSG_CTRUNC) 281 ret_flags |= MSG_CTRUNC; 282 if (flags & LINUX_MSG_TRUNC) 283 ret_flags |= MSG_TRUNC; 284 if (flags & LINUX_MSG_DONTWAIT) 285 ret_flags |= MSG_DONTWAIT; 286 if (flags & LINUX_MSG_EOR) 287 ret_flags |= MSG_EOR; 288 if (flags & LINUX_MSG_WAITALL) 289 ret_flags |= MSG_WAITALL; 290 if (flags & LINUX_MSG_NOSIGNAL) 291 ret_flags |= MSG_NOSIGNAL; 292 #if 0 /* not handled */ 293 if (flags & LINUX_MSG_PROXY) 294 ; 295 if (flags & LINUX_MSG_FIN) 296 ; 297 if (flags & LINUX_MSG_SYN) 298 ; 299 if (flags & LINUX_MSG_CONFIRM) 300 ; 301 if (flags & LINUX_MSG_RST) 302 ; 303 if (flags & LINUX_MSG_ERRQUEUE) 304 ; 305 #endif 306 return (ret_flags); 307 } 308 309 static int 310 linux_to_bsd_cmsg_type(int cmsg_type) 311 { 312 313 switch (cmsg_type) { 314 case LINUX_SCM_RIGHTS: 315 return (SCM_RIGHTS); 316 case LINUX_SCM_CREDENTIALS: 317 return (SCM_CREDS); 318 } 319 return (-1); 320 } 321 322 static int 323 bsd_to_linux_cmsg_type(int cmsg_type) 324 { 325 326 switch (cmsg_type) { 327 case SCM_RIGHTS: 328 return (LINUX_SCM_RIGHTS); 329 case SCM_CREDS: 330 return (LINUX_SCM_CREDENTIALS); 331 case SCM_TIMESTAMP: 332 return (LINUX_SCM_TIMESTAMP); 333 } 334 return (-1); 335 } 336 337 static int 338 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 339 { 340 if (lhdr->msg_controllen > INT_MAX) 341 return (ENOBUFS); 342 343 bhdr->msg_name = PTRIN(lhdr->msg_name); 344 bhdr->msg_namelen = lhdr->msg_namelen; 345 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 346 bhdr->msg_iovlen = lhdr->msg_iovlen; 347 bhdr->msg_control = PTRIN(lhdr->msg_control); 348 349 /* 350 * msg_controllen is skipped since BSD and LINUX control messages 351 * are potentially different sizes (e.g. the cred structure used 352 * by SCM_CREDS is different between the two operating system). 353 * 354 * The caller can set it (if necessary) after converting all the 355 * control messages. 356 */ 357 358 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 359 return (0); 360 } 361 362 static int 363 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 364 { 365 lhdr->msg_name = PTROUT(bhdr->msg_name); 366 lhdr->msg_namelen = bhdr->msg_namelen; 367 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 368 lhdr->msg_iovlen = bhdr->msg_iovlen; 369 lhdr->msg_control = PTROUT(bhdr->msg_control); 370 371 /* 372 * msg_controllen is skipped since BSD and LINUX control messages 373 * are potentially different sizes (e.g. the cred structure used 374 * by SCM_CREDS is different between the two operating system). 375 * 376 * The caller can set it (if necessary) after converting all the 377 * control messages. 378 */ 379 380 /* msg_flags skipped */ 381 return (0); 382 } 383 384 static int 385 linux_set_socket_flags(int lflags, int *flags) 386 { 387 388 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 389 return (EINVAL); 390 if (lflags & LINUX_SOCK_NONBLOCK) 391 *flags |= SOCK_NONBLOCK; 392 if (lflags & LINUX_SOCK_CLOEXEC) 393 *flags |= SOCK_CLOEXEC; 394 return (0); 395 } 396 397 static int 398 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 399 struct mbuf *control, enum uio_seg segflg) 400 { 401 struct sockaddr *to; 402 int error, len; 403 404 if (mp->msg_name != NULL) { 405 len = mp->msg_namelen; 406 error = linux_to_bsd_sockaddr(mp->msg_name, &to, &len); 407 if (error != 0) 408 return (error); 409 mp->msg_name = to; 410 } else 411 to = NULL; 412 413 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 414 segflg); 415 416 if (to) 417 free(to, M_SONAME); 418 return (error); 419 } 420 421 /* Return 0 if IP_HDRINCL is set for the given socket. */ 422 static int 423 linux_check_hdrincl(struct thread *td, int s) 424 { 425 int error, optval; 426 socklen_t size_val; 427 428 size_val = sizeof(optval); 429 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 430 &optval, UIO_SYSSPACE, &size_val); 431 if (error != 0) 432 return (error); 433 434 return (optval == 0); 435 } 436 437 /* 438 * Updated sendto() when IP_HDRINCL is set: 439 * tweak endian-dependent fields in the IP packet. 440 */ 441 static int 442 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 443 { 444 /* 445 * linux_ip_copysize defines how many bytes we should copy 446 * from the beginning of the IP packet before we customize it for BSD. 447 * It should include all the fields we modify (ip_len and ip_off). 448 */ 449 #define linux_ip_copysize 8 450 451 struct ip *packet; 452 struct msghdr msg; 453 struct iovec aiov[1]; 454 int error; 455 456 /* Check that the packet isn't too big or too small. */ 457 if (linux_args->len < linux_ip_copysize || 458 linux_args->len > IP_MAXPACKET) 459 return (EINVAL); 460 461 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK); 462 463 /* Make kernel copy of the packet to be sent */ 464 if ((error = copyin(PTRIN(linux_args->msg), packet, 465 linux_args->len))) 466 goto goout; 467 468 /* Convert fields from Linux to BSD raw IP socket format */ 469 packet->ip_len = linux_args->len; 470 packet->ip_off = ntohs(packet->ip_off); 471 472 /* Prepare the msghdr and iovec structures describing the new packet */ 473 msg.msg_name = PTRIN(linux_args->to); 474 msg.msg_namelen = linux_args->tolen; 475 msg.msg_iov = aiov; 476 msg.msg_iovlen = 1; 477 msg.msg_control = NULL; 478 msg.msg_flags = 0; 479 aiov[0].iov_base = (char *)packet; 480 aiov[0].iov_len = linux_args->len; 481 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 482 NULL, UIO_SYSSPACE); 483 goout: 484 free(packet, M_LINUX); 485 return (error); 486 } 487 488 int 489 linux_socket(struct thread *td, struct linux_socket_args *args) 490 { 491 int domain, retval_socket, type; 492 493 type = args->type & LINUX_SOCK_TYPE_MASK; 494 if (type < 0 || type > LINUX_SOCK_MAX) 495 return (EINVAL); 496 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 497 &type); 498 if (retval_socket != 0) 499 return (retval_socket); 500 domain = linux_to_bsd_domain(args->domain); 501 if (domain == -1) 502 return (EAFNOSUPPORT); 503 504 retval_socket = kern_socket(td, domain, type, args->protocol); 505 if (retval_socket) 506 return (retval_socket); 507 508 if (type == SOCK_RAW 509 && (args->protocol == IPPROTO_RAW || args->protocol == 0) 510 && domain == PF_INET) { 511 /* It's a raw IP socket: set the IP_HDRINCL option. */ 512 int hdrincl; 513 514 hdrincl = 1; 515 /* We ignore any error returned by kern_setsockopt() */ 516 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 517 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 518 } 519 #ifdef INET6 520 /* 521 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 522 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 523 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 524 * sysctl value. 525 */ 526 if (domain == PF_INET6) { 527 int v6only; 528 529 v6only = 0; 530 /* We ignore any error returned by setsockopt() */ 531 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 532 &v6only, UIO_SYSSPACE, sizeof(v6only)); 533 } 534 #endif 535 536 return (retval_socket); 537 } 538 539 int 540 linux_bind(struct thread *td, struct linux_bind_args *args) 541 { 542 struct sockaddr *sa; 543 int error; 544 545 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, 546 &args->namelen); 547 if (error != 0) 548 return (error); 549 550 error = kern_bindat(td, AT_FDCWD, args->s, sa); 551 free(sa, M_SONAME); 552 553 /* XXX */ 554 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 555 return (EINVAL); 556 return (error); 557 } 558 559 int 560 linux_connect(struct thread *td, struct linux_connect_args *args) 561 { 562 struct socket *so; 563 struct sockaddr *sa; 564 struct file *fp; 565 u_int fflag; 566 int error; 567 568 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, 569 &args->namelen); 570 if (error != 0) 571 return (error); 572 573 error = kern_connectat(td, AT_FDCWD, args->s, sa); 574 free(sa, M_SONAME); 575 if (error != EISCONN) 576 return (error); 577 578 /* 579 * Linux doesn't return EISCONN the first time it occurs, 580 * when on a non-blocking socket. Instead it returns the 581 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 582 */ 583 error = getsock_cap(td, args->s, &cap_connect_rights, 584 &fp, &fflag, NULL); 585 if (error != 0) 586 return (error); 587 588 error = EISCONN; 589 so = fp->f_data; 590 if (fflag & FNONBLOCK) { 591 SOCK_LOCK(so); 592 if (so->so_emuldata == 0) 593 error = so->so_error; 594 so->so_emuldata = (void *)1; 595 SOCK_UNLOCK(so); 596 } 597 fdrop(fp, td); 598 599 return (error); 600 } 601 602 int 603 linux_listen(struct thread *td, struct linux_listen_args *args) 604 { 605 606 return (kern_listen(td, args->s, args->backlog)); 607 } 608 609 static int 610 linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 611 l_uintptr_t namelen, int flags) 612 { 613 struct l_sockaddr *lsa; 614 struct sockaddr *sa; 615 struct file *fp, *fp1; 616 int bflags, len; 617 struct socket *so; 618 int error, error1; 619 620 bflags = 0; 621 fp = NULL; 622 sa = NULL; 623 624 error = linux_set_socket_flags(flags, &bflags); 625 if (error != 0) 626 return (error); 627 628 if (PTRIN(addr) == NULL) { 629 len = 0; 630 error = kern_accept4(td, s, NULL, NULL, bflags, NULL); 631 } else { 632 error = copyin(PTRIN(namelen), &len, sizeof(len)); 633 if (error != 0) 634 return (error); 635 if (len < 0) 636 return (EINVAL); 637 error = kern_accept4(td, s, &sa, &len, bflags, &fp); 638 } 639 640 /* 641 * Translate errno values into ones used by Linux. 642 */ 643 if (error != 0) { 644 /* 645 * XXX. This is wrong, different sockaddr structures 646 * have different sizes. 647 */ 648 switch (error) { 649 case EFAULT: 650 if (namelen != sizeof(struct sockaddr_in)) 651 error = EINVAL; 652 break; 653 case EINVAL: 654 error1 = getsock_cap(td, s, &cap_accept_rights, &fp1, NULL, NULL); 655 if (error1 != 0) { 656 error = error1; 657 break; 658 } 659 so = fp1->f_data; 660 if (so->so_type == SOCK_DGRAM) 661 error = EOPNOTSUPP; 662 fdrop(fp1, td); 663 break; 664 } 665 return (error); 666 } 667 668 if (len != 0) { 669 error = bsd_to_linux_sockaddr(sa, &lsa, len); 670 if (error == 0) 671 error = copyout(lsa, PTRIN(addr), len); 672 free(lsa, M_SONAME); 673 674 /* 675 * XXX: We should also copyout the len, shouldn't we? 676 */ 677 678 if (error != 0) { 679 fdclose(td, fp, td->td_retval[0]); 680 td->td_retval[0] = 0; 681 } 682 } 683 if (fp != NULL) 684 fdrop(fp, td); 685 free(sa, M_SONAME); 686 return (error); 687 } 688 689 int 690 linux_accept(struct thread *td, struct linux_accept_args *args) 691 { 692 693 return (linux_accept_common(td, args->s, args->addr, 694 args->namelen, 0)); 695 } 696 697 int 698 linux_accept4(struct thread *td, struct linux_accept4_args *args) 699 { 700 701 return (linux_accept_common(td, args->s, args->addr, 702 args->namelen, args->flags)); 703 } 704 705 int 706 linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 707 { 708 struct l_sockaddr *lsa; 709 struct sockaddr *sa; 710 int len, error; 711 712 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 713 if (error != 0) 714 return (error); 715 716 error = kern_getsockname(td, args->s, &sa, &len); 717 if (error != 0) 718 return (error); 719 720 if (len != 0) { 721 error = bsd_to_linux_sockaddr(sa, &lsa, len); 722 if (error == 0) 723 error = copyout(lsa, PTRIN(args->addr), 724 len); 725 free(lsa, M_SONAME); 726 } 727 728 free(sa, M_SONAME); 729 if (error == 0) 730 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 731 return (error); 732 } 733 734 int 735 linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 736 { 737 struct l_sockaddr *lsa; 738 struct sockaddr *sa; 739 int len, error; 740 741 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 742 if (error != 0) 743 return (error); 744 if (len < 0) 745 return (EINVAL); 746 747 error = kern_getpeername(td, args->s, &sa, &len); 748 if (error != 0) 749 return (error); 750 751 if (len != 0) { 752 error = bsd_to_linux_sockaddr(sa, &lsa, len); 753 if (error == 0) 754 error = copyout(lsa, PTRIN(args->addr), 755 len); 756 free(lsa, M_SONAME); 757 } 758 759 free(sa, M_SONAME); 760 if (error == 0) 761 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 762 return (error); 763 } 764 765 int 766 linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 767 { 768 int domain, error, sv[2], type; 769 770 domain = linux_to_bsd_domain(args->domain); 771 if (domain != PF_LOCAL) 772 return (EAFNOSUPPORT); 773 type = args->type & LINUX_SOCK_TYPE_MASK; 774 if (type < 0 || type > LINUX_SOCK_MAX) 775 return (EINVAL); 776 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 777 &type); 778 if (error != 0) 779 return (error); 780 if (args->protocol != 0 && args->protocol != PF_UNIX) { 781 782 /* 783 * Use of PF_UNIX as protocol argument is not right, 784 * but Linux does it. 785 * Do not map PF_UNIX as its Linux value is identical 786 * to FreeBSD one. 787 */ 788 return (EPROTONOSUPPORT); 789 } 790 error = kern_socketpair(td, domain, type, 0, sv); 791 if (error != 0) 792 return (error); 793 error = copyout(sv, PTRIN(args->rsv), 2 * sizeof(int)); 794 if (error != 0) { 795 (void)kern_close(td, sv[0]); 796 (void)kern_close(td, sv[1]); 797 } 798 return (error); 799 } 800 801 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 802 struct linux_send_args { 803 register_t s; 804 register_t msg; 805 register_t len; 806 register_t flags; 807 }; 808 809 static int 810 linux_send(struct thread *td, struct linux_send_args *args) 811 { 812 struct sendto_args /* { 813 int s; 814 caddr_t buf; 815 int len; 816 int flags; 817 caddr_t to; 818 int tolen; 819 } */ bsd_args; 820 struct file *fp; 821 int error, fflag; 822 823 bsd_args.s = args->s; 824 bsd_args.buf = (caddr_t)PTRIN(args->msg); 825 bsd_args.len = args->len; 826 bsd_args.flags = args->flags; 827 bsd_args.to = NULL; 828 bsd_args.tolen = 0; 829 error = sys_sendto(td, &bsd_args); 830 if (error == ENOTCONN) { 831 /* 832 * Linux doesn't return ENOTCONN for non-blocking sockets. 833 * Instead it returns the EAGAIN. 834 */ 835 error = getsock_cap(td, args->s, &cap_send_rights, &fp, 836 &fflag, NULL); 837 if (error == 0) { 838 if (fflag & FNONBLOCK) 839 error = EAGAIN; 840 fdrop(fp, td); 841 } 842 } 843 return (error); 844 } 845 846 struct linux_recv_args { 847 register_t s; 848 register_t msg; 849 register_t len; 850 register_t flags; 851 }; 852 853 static int 854 linux_recv(struct thread *td, struct linux_recv_args *args) 855 { 856 struct recvfrom_args /* { 857 int s; 858 caddr_t buf; 859 int len; 860 int flags; 861 struct sockaddr *from; 862 socklen_t fromlenaddr; 863 } */ bsd_args; 864 865 bsd_args.s = args->s; 866 bsd_args.buf = (caddr_t)PTRIN(args->msg); 867 bsd_args.len = args->len; 868 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 869 bsd_args.from = NULL; 870 bsd_args.fromlenaddr = 0; 871 return (sys_recvfrom(td, &bsd_args)); 872 } 873 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 874 875 int 876 linux_sendto(struct thread *td, struct linux_sendto_args *args) 877 { 878 struct msghdr msg; 879 struct iovec aiov; 880 881 if (linux_check_hdrincl(td, args->s) == 0) 882 /* IP_HDRINCL set, tweak the packet before sending */ 883 return (linux_sendto_hdrincl(td, args)); 884 885 msg.msg_name = PTRIN(args->to); 886 msg.msg_namelen = args->tolen; 887 msg.msg_iov = &aiov; 888 msg.msg_iovlen = 1; 889 msg.msg_control = NULL; 890 msg.msg_flags = 0; 891 aiov.iov_base = PTRIN(args->msg); 892 aiov.iov_len = args->len; 893 return (linux_sendit(td, args->s, &msg, args->flags, NULL, 894 UIO_USERSPACE)); 895 } 896 897 int 898 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 899 { 900 struct l_sockaddr *lsa; 901 struct sockaddr *sa; 902 struct msghdr msg; 903 struct iovec aiov; 904 int error, fromlen; 905 906 if (PTRIN(args->fromlen) != NULL) { 907 error = copyin(PTRIN(args->fromlen), &fromlen, 908 sizeof(fromlen)); 909 if (error != 0) 910 return (error); 911 if (fromlen < 0) 912 return (EINVAL); 913 sa = malloc(fromlen, M_SONAME, M_WAITOK); 914 } else { 915 fromlen = 0; 916 sa = NULL; 917 } 918 919 msg.msg_name = sa; 920 msg.msg_namelen = fromlen; 921 msg.msg_iov = &aiov; 922 msg.msg_iovlen = 1; 923 aiov.iov_base = PTRIN(args->buf); 924 aiov.iov_len = args->len; 925 msg.msg_control = 0; 926 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 927 928 error = kern_recvit(td, args->s, &msg, UIO_SYSSPACE, NULL); 929 if (error != 0) 930 goto out; 931 932 if (PTRIN(args->from) != NULL) { 933 error = bsd_to_linux_sockaddr(sa, &lsa, msg.msg_namelen); 934 if (error == 0) 935 error = copyout(lsa, PTRIN(args->from), 936 msg.msg_namelen); 937 free(lsa, M_SONAME); 938 } 939 940 if (error == 0 && PTRIN(args->fromlen) != NULL) 941 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 942 sizeof(msg.msg_namelen)); 943 out: 944 free(sa, M_SONAME); 945 return (error); 946 } 947 948 static int 949 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 950 l_uint flags) 951 { 952 struct cmsghdr *cmsg; 953 struct mbuf *control; 954 struct msghdr msg; 955 struct l_cmsghdr linux_cmsg; 956 struct l_cmsghdr *ptr_cmsg; 957 struct l_msghdr linux_msghdr; 958 struct iovec *iov; 959 socklen_t datalen; 960 struct sockaddr *sa; 961 struct socket *so; 962 sa_family_t sa_family; 963 struct file *fp; 964 void *data; 965 l_size_t len; 966 l_size_t clen; 967 int error, fflag; 968 969 error = copyin(msghdr, &linux_msghdr, sizeof(linux_msghdr)); 970 if (error != 0) 971 return (error); 972 973 /* 974 * Some Linux applications (ping) define a non-NULL control data 975 * pointer, but a msg_controllen of 0, which is not allowed in the 976 * FreeBSD system call interface. NULL the msg_control pointer in 977 * order to handle this case. This should be checked, but allows the 978 * Linux ping to work. 979 */ 980 if (PTRIN(linux_msghdr.msg_control) != NULL && 981 linux_msghdr.msg_controllen == 0) 982 linux_msghdr.msg_control = PTROUT(NULL); 983 984 error = linux_to_bsd_msghdr(&msg, &linux_msghdr); 985 if (error != 0) 986 return (error); 987 988 #ifdef COMPAT_LINUX32 989 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 990 &iov, EMSGSIZE); 991 #else 992 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 993 #endif 994 if (error != 0) 995 return (error); 996 997 control = NULL; 998 999 error = kern_getsockname(td, s, &sa, &datalen); 1000 if (error != 0) 1001 goto bad; 1002 sa_family = sa->sa_family; 1003 free(sa, M_SONAME); 1004 1005 if (flags & LINUX_MSG_OOB) { 1006 error = EOPNOTSUPP; 1007 if (sa_family == AF_UNIX) 1008 goto bad; 1009 1010 error = getsock_cap(td, s, &cap_send_rights, &fp, 1011 &fflag, NULL); 1012 if (error != 0) 1013 goto bad; 1014 so = fp->f_data; 1015 if (so->so_type != SOCK_STREAM) 1016 error = EOPNOTSUPP; 1017 fdrop(fp, td); 1018 if (error != 0) 1019 goto bad; 1020 } 1021 1022 if (linux_msghdr.msg_controllen >= sizeof(struct l_cmsghdr)) { 1023 1024 error = ENOBUFS; 1025 control = m_get(M_WAITOK, MT_CONTROL); 1026 MCLGET(control, M_WAITOK); 1027 data = mtod(control, void *); 1028 datalen = 0; 1029 1030 ptr_cmsg = PTRIN(linux_msghdr.msg_control); 1031 clen = linux_msghdr.msg_controllen; 1032 do { 1033 error = copyin(ptr_cmsg, &linux_cmsg, 1034 sizeof(struct l_cmsghdr)); 1035 if (error != 0) 1036 goto bad; 1037 1038 error = EINVAL; 1039 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr) || 1040 linux_cmsg.cmsg_len > clen) 1041 goto bad; 1042 1043 if (datalen + CMSG_HDRSZ > MCLBYTES) 1044 goto bad; 1045 1046 /* 1047 * Now we support only SCM_RIGHTS and SCM_CRED, 1048 * so return EINVAL in any other cmsg_type 1049 */ 1050 cmsg = data; 1051 cmsg->cmsg_type = 1052 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1053 cmsg->cmsg_level = 1054 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1055 if (cmsg->cmsg_type == -1 1056 || cmsg->cmsg_level != SOL_SOCKET) { 1057 linux_msg(curthread, 1058 "unsupported sendmsg cmsg level %d type %d", 1059 linux_cmsg.cmsg_level, linux_cmsg.cmsg_type); 1060 goto bad; 1061 } 1062 1063 /* 1064 * Some applications (e.g. pulseaudio) attempt to 1065 * send ancillary data even if the underlying protocol 1066 * doesn't support it which is not allowed in the 1067 * FreeBSD system call interface. 1068 */ 1069 if (sa_family != AF_UNIX) 1070 continue; 1071 1072 if (cmsg->cmsg_type == SCM_CREDS) { 1073 len = sizeof(struct cmsgcred); 1074 if (datalen + CMSG_SPACE(len) > MCLBYTES) 1075 goto bad; 1076 1077 /* 1078 * The lower levels will fill in the structure 1079 */ 1080 memset(CMSG_DATA(data), 0, len); 1081 } else { 1082 len = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1083 if (datalen + CMSG_SPACE(len) < datalen || 1084 datalen + CMSG_SPACE(len) > MCLBYTES) 1085 goto bad; 1086 1087 error = copyin(LINUX_CMSG_DATA(ptr_cmsg), 1088 CMSG_DATA(data), len); 1089 if (error != 0) 1090 goto bad; 1091 } 1092 1093 cmsg->cmsg_len = CMSG_LEN(len); 1094 data = (char *)data + CMSG_SPACE(len); 1095 datalen += CMSG_SPACE(len); 1096 1097 if (clen <= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)) 1098 break; 1099 1100 clen -= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len); 1101 ptr_cmsg = (struct l_cmsghdr *)((char *)ptr_cmsg + 1102 LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)); 1103 } while(clen >= sizeof(struct l_cmsghdr)); 1104 1105 control->m_len = datalen; 1106 if (datalen == 0) { 1107 m_freem(control); 1108 control = NULL; 1109 } 1110 } 1111 1112 msg.msg_iov = iov; 1113 msg.msg_flags = 0; 1114 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1115 control = NULL; 1116 1117 bad: 1118 m_freem(control); 1119 free(iov, M_IOV); 1120 return (error); 1121 } 1122 1123 int 1124 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1125 { 1126 1127 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1128 args->flags)); 1129 } 1130 1131 int 1132 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1133 { 1134 struct l_mmsghdr *msg; 1135 l_uint retval; 1136 int error, datagrams; 1137 1138 if (args->vlen > UIO_MAXIOV) 1139 args->vlen = UIO_MAXIOV; 1140 1141 msg = PTRIN(args->msg); 1142 datagrams = 0; 1143 while (datagrams < args->vlen) { 1144 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1145 args->flags); 1146 if (error != 0) 1147 break; 1148 1149 retval = td->td_retval[0]; 1150 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1151 if (error != 0) 1152 break; 1153 ++msg; 1154 ++datagrams; 1155 } 1156 if (error == 0) 1157 td->td_retval[0] = datagrams; 1158 return (error); 1159 } 1160 1161 static int 1162 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1163 l_uint flags, struct msghdr *msg) 1164 { 1165 struct cmsghdr *cm; 1166 struct cmsgcred *cmcred; 1167 struct l_cmsghdr *linux_cmsg = NULL; 1168 struct l_ucred linux_ucred; 1169 socklen_t datalen, maxlen, outlen; 1170 struct l_msghdr linux_msghdr; 1171 struct iovec *iov, *uiov; 1172 struct mbuf *control = NULL; 1173 struct mbuf **controlp; 1174 struct timeval *ftmvl; 1175 struct l_sockaddr *lsa; 1176 struct sockaddr *sa; 1177 l_timeval ltmvl; 1178 caddr_t outbuf; 1179 void *data; 1180 int error, i, fd, fds, *fdp; 1181 1182 error = copyin(msghdr, &linux_msghdr, sizeof(linux_msghdr)); 1183 if (error != 0) 1184 return (error); 1185 1186 error = linux_to_bsd_msghdr(msg, &linux_msghdr); 1187 if (error != 0) 1188 return (error); 1189 1190 #ifdef COMPAT_LINUX32 1191 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1192 &iov, EMSGSIZE); 1193 #else 1194 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1195 #endif 1196 if (error != 0) 1197 return (error); 1198 1199 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1200 msg->msg_namelen = min(msg->msg_namelen, SOCK_MAXADDRLEN); 1201 sa = malloc(msg->msg_namelen, M_SONAME, M_WAITOK); 1202 msg->msg_name = sa; 1203 } else { 1204 sa = NULL; 1205 msg->msg_name = NULL; 1206 } 1207 1208 uiov = msg->msg_iov; 1209 msg->msg_iov = iov; 1210 controlp = (msg->msg_control != NULL) ? &control : NULL; 1211 error = kern_recvit(td, s, msg, UIO_SYSSPACE, controlp); 1212 msg->msg_iov = uiov; 1213 if (error != 0) 1214 goto bad; 1215 1216 /* 1217 * Note that kern_recvit() updates msg->msg_namelen. 1218 */ 1219 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1220 msg->msg_name = PTRIN(linux_msghdr.msg_name); 1221 error = bsd_to_linux_sockaddr(sa, &lsa, msg->msg_namelen); 1222 if (error == 0) 1223 error = copyout(lsa, PTRIN(msg->msg_name), 1224 msg->msg_namelen); 1225 free(lsa, M_SONAME); 1226 if (error != 0) 1227 goto bad; 1228 } 1229 1230 error = bsd_to_linux_msghdr(msg, &linux_msghdr); 1231 if (error != 0) 1232 goto bad; 1233 1234 maxlen = linux_msghdr.msg_controllen; 1235 linux_msghdr.msg_controllen = 0; 1236 if (control) { 1237 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1238 1239 msg->msg_control = mtod(control, struct cmsghdr *); 1240 msg->msg_controllen = control->m_len; 1241 1242 cm = CMSG_FIRSTHDR(msg); 1243 outbuf = PTRIN(linux_msghdr.msg_control); 1244 outlen = 0; 1245 while (cm != NULL) { 1246 linux_cmsg->cmsg_type = 1247 bsd_to_linux_cmsg_type(cm->cmsg_type); 1248 linux_cmsg->cmsg_level = 1249 bsd_to_linux_sockopt_level(cm->cmsg_level); 1250 if (linux_cmsg->cmsg_type == -1 || 1251 cm->cmsg_level != SOL_SOCKET) { 1252 linux_msg(curthread, 1253 "unsupported recvmsg cmsg level %d type %d", 1254 cm->cmsg_level, cm->cmsg_type); 1255 error = EINVAL; 1256 goto bad; 1257 } 1258 1259 data = CMSG_DATA(cm); 1260 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1261 1262 switch (cm->cmsg_type) { 1263 case SCM_RIGHTS: 1264 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1265 fds = datalen / sizeof(int); 1266 fdp = data; 1267 for (i = 0; i < fds; i++) { 1268 fd = *fdp++; 1269 (void)kern_fcntl(td, fd, 1270 F_SETFD, FD_CLOEXEC); 1271 } 1272 } 1273 break; 1274 1275 case SCM_CREDS: 1276 /* 1277 * Currently LOCAL_CREDS is never in 1278 * effect for Linux so no need to worry 1279 * about sockcred 1280 */ 1281 if (datalen != sizeof(*cmcred)) { 1282 error = EMSGSIZE; 1283 goto bad; 1284 } 1285 cmcred = (struct cmsgcred *)data; 1286 bzero(&linux_ucred, sizeof(linux_ucred)); 1287 linux_ucred.pid = cmcred->cmcred_pid; 1288 linux_ucred.uid = cmcred->cmcred_uid; 1289 linux_ucred.gid = cmcred->cmcred_gid; 1290 data = &linux_ucred; 1291 datalen = sizeof(linux_ucred); 1292 break; 1293 1294 case SCM_TIMESTAMP: 1295 if (datalen != sizeof(struct timeval)) { 1296 error = EMSGSIZE; 1297 goto bad; 1298 } 1299 ftmvl = (struct timeval *)data; 1300 ltmvl.tv_sec = ftmvl->tv_sec; 1301 ltmvl.tv_usec = ftmvl->tv_usec; 1302 data = <mvl; 1303 datalen = sizeof(ltmvl); 1304 break; 1305 } 1306 1307 if (outlen + LINUX_CMSG_LEN(datalen) > maxlen) { 1308 if (outlen == 0) { 1309 error = EMSGSIZE; 1310 goto bad; 1311 } else { 1312 linux_msghdr.msg_flags |= LINUX_MSG_CTRUNC; 1313 m_dispose_extcontrolm(control); 1314 goto out; 1315 } 1316 } 1317 1318 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1319 1320 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1321 if (error != 0) 1322 goto bad; 1323 outbuf += L_CMSG_HDRSZ; 1324 1325 error = copyout(data, outbuf, datalen); 1326 if (error != 0) 1327 goto bad; 1328 1329 outbuf += LINUX_CMSG_ALIGN(datalen); 1330 outlen += LINUX_CMSG_LEN(datalen); 1331 1332 cm = CMSG_NXTHDR(msg, cm); 1333 } 1334 linux_msghdr.msg_controllen = outlen; 1335 } 1336 1337 out: 1338 error = copyout(&linux_msghdr, msghdr, sizeof(linux_msghdr)); 1339 1340 bad: 1341 if (control != NULL) { 1342 if (error != 0) 1343 m_dispose_extcontrolm(control); 1344 m_freem(control); 1345 } 1346 free(iov, M_IOV); 1347 free(linux_cmsg, M_LINUX); 1348 free(sa, M_SONAME); 1349 1350 return (error); 1351 } 1352 1353 int 1354 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1355 { 1356 struct msghdr bsd_msg; 1357 1358 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1359 args->flags, &bsd_msg)); 1360 } 1361 1362 int 1363 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1364 { 1365 struct l_mmsghdr *msg; 1366 struct msghdr bsd_msg; 1367 struct l_timespec lts; 1368 struct timespec ts, tts; 1369 l_uint retval; 1370 int error, datagrams; 1371 1372 if (args->timeout) { 1373 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1374 if (error != 0) 1375 return (error); 1376 error = linux_to_native_timespec(&ts, <s); 1377 if (error != 0) 1378 return (error); 1379 getnanotime(&tts); 1380 timespecadd(&tts, &ts, &tts); 1381 } 1382 1383 msg = PTRIN(args->msg); 1384 datagrams = 0; 1385 while (datagrams < args->vlen) { 1386 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1387 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1388 if (error != 0) 1389 break; 1390 1391 retval = td->td_retval[0]; 1392 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1393 if (error != 0) 1394 break; 1395 ++msg; 1396 ++datagrams; 1397 1398 /* 1399 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1400 */ 1401 if (args->flags & LINUX_MSG_WAITFORONE) 1402 args->flags |= LINUX_MSG_DONTWAIT; 1403 1404 /* 1405 * See BUGS section of recvmmsg(2). 1406 */ 1407 if (args->timeout) { 1408 getnanotime(&ts); 1409 timespecsub(&ts, &tts, &ts); 1410 if (!timespecisset(&ts) || ts.tv_sec > 0) 1411 break; 1412 } 1413 /* Out of band data, return right away. */ 1414 if (bsd_msg.msg_flags & MSG_OOB) 1415 break; 1416 } 1417 if (error == 0) 1418 td->td_retval[0] = datagrams; 1419 return (error); 1420 } 1421 1422 int 1423 linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1424 { 1425 1426 return (kern_shutdown(td, args->s, args->how)); 1427 } 1428 1429 int 1430 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1431 { 1432 l_timeval linux_tv; 1433 struct sockaddr *sa; 1434 struct timeval tv; 1435 socklen_t len; 1436 int error, level, name; 1437 1438 level = linux_to_bsd_sockopt_level(args->level); 1439 switch (level) { 1440 case SOL_SOCKET: 1441 name = linux_to_bsd_so_sockopt(args->optname); 1442 switch (name) { 1443 case SO_RCVTIMEO: 1444 /* FALLTHROUGH */ 1445 case SO_SNDTIMEO: 1446 error = copyin(PTRIN(args->optval), &linux_tv, 1447 sizeof(linux_tv)); 1448 if (error != 0) 1449 return (error); 1450 tv.tv_sec = linux_tv.tv_sec; 1451 tv.tv_usec = linux_tv.tv_usec; 1452 return (kern_setsockopt(td, args->s, level, 1453 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1454 /* NOTREACHED */ 1455 default: 1456 break; 1457 } 1458 break; 1459 case IPPROTO_IP: 1460 if (args->optname == LINUX_IP_RECVERR && 1461 linux_ignore_ip_recverr) { 1462 /* 1463 * XXX: This is a hack to unbreak DNS resolution 1464 * with glibc 2.30 and above. 1465 */ 1466 return (0); 1467 } 1468 name = linux_to_bsd_ip_sockopt(args->optname); 1469 break; 1470 case IPPROTO_IPV6: 1471 name = linux_to_bsd_ip6_sockopt(args->optname); 1472 break; 1473 case IPPROTO_TCP: 1474 name = linux_to_bsd_tcp_sockopt(args->optname); 1475 break; 1476 default: 1477 name = -1; 1478 break; 1479 } 1480 if (name == -1) { 1481 linux_msg(curthread, 1482 "unsupported setsockopt level %d optname %d", 1483 args->level, args->optname); 1484 return (ENOPROTOOPT); 1485 } 1486 1487 if (name == IPV6_NEXTHOP) { 1488 len = args->optlen; 1489 error = linux_to_bsd_sockaddr(PTRIN(args->optval), &sa, &len); 1490 if (error != 0) 1491 return (error); 1492 1493 error = kern_setsockopt(td, args->s, level, 1494 name, sa, UIO_SYSSPACE, len); 1495 free(sa, M_SONAME); 1496 } else { 1497 error = kern_setsockopt(td, args->s, level, 1498 name, PTRIN(args->optval), UIO_USERSPACE, args->optlen); 1499 } 1500 1501 return (error); 1502 } 1503 1504 int 1505 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1506 { 1507 l_timeval linux_tv; 1508 struct timeval tv; 1509 socklen_t tv_len, xulen, len; 1510 struct l_sockaddr *lsa; 1511 struct sockaddr *sa; 1512 struct xucred xu; 1513 struct l_ucred lxu; 1514 int error, level, name, newval; 1515 1516 level = linux_to_bsd_sockopt_level(args->level); 1517 switch (level) { 1518 case SOL_SOCKET: 1519 name = linux_to_bsd_so_sockopt(args->optname); 1520 switch (name) { 1521 case SO_RCVTIMEO: 1522 /* FALLTHROUGH */ 1523 case SO_SNDTIMEO: 1524 tv_len = sizeof(tv); 1525 error = kern_getsockopt(td, args->s, level, 1526 name, &tv, UIO_SYSSPACE, &tv_len); 1527 if (error != 0) 1528 return (error); 1529 linux_tv.tv_sec = tv.tv_sec; 1530 linux_tv.tv_usec = tv.tv_usec; 1531 return (copyout(&linux_tv, PTRIN(args->optval), 1532 sizeof(linux_tv))); 1533 /* NOTREACHED */ 1534 case LOCAL_PEERCRED: 1535 if (args->optlen < sizeof(lxu)) 1536 return (EINVAL); 1537 /* 1538 * LOCAL_PEERCRED is not served at the SOL_SOCKET level, 1539 * but by the Unix socket's level 0. 1540 */ 1541 level = 0; 1542 xulen = sizeof(xu); 1543 error = kern_getsockopt(td, args->s, level, 1544 name, &xu, UIO_SYSSPACE, &xulen); 1545 if (error != 0) 1546 return (error); 1547 lxu.pid = xu.cr_pid; 1548 lxu.uid = xu.cr_uid; 1549 lxu.gid = xu.cr_gid; 1550 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1551 /* NOTREACHED */ 1552 case SO_ERROR: 1553 len = sizeof(newval); 1554 error = kern_getsockopt(td, args->s, level, 1555 name, &newval, UIO_SYSSPACE, &len); 1556 if (error != 0) 1557 return (error); 1558 newval = -SV_ABI_ERRNO(td->td_proc, newval); 1559 return (copyout(&newval, PTRIN(args->optval), len)); 1560 /* NOTREACHED */ 1561 default: 1562 break; 1563 } 1564 break; 1565 case IPPROTO_IP: 1566 name = linux_to_bsd_ip_sockopt(args->optname); 1567 break; 1568 case IPPROTO_IPV6: 1569 name = linux_to_bsd_ip6_sockopt(args->optname); 1570 break; 1571 case IPPROTO_TCP: 1572 name = linux_to_bsd_tcp_sockopt(args->optname); 1573 break; 1574 default: 1575 name = -1; 1576 break; 1577 } 1578 if (name == -1) { 1579 linux_msg(curthread, 1580 "unsupported getsockopt level %d optname %d", 1581 args->level, args->optname); 1582 return (EINVAL); 1583 } 1584 1585 if (name == IPV6_NEXTHOP) { 1586 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 1587 if (error != 0) 1588 return (error); 1589 sa = malloc(len, M_SONAME, M_WAITOK); 1590 1591 error = kern_getsockopt(td, args->s, level, 1592 name, sa, UIO_SYSSPACE, &len); 1593 if (error != 0) 1594 goto out; 1595 1596 error = bsd_to_linux_sockaddr(sa, &lsa, len); 1597 if (error == 0) 1598 error = copyout(lsa, PTRIN(args->optval), len); 1599 free(lsa, M_SONAME); 1600 if (error == 0) 1601 error = copyout(&len, PTRIN(args->optlen), 1602 sizeof(len)); 1603 out: 1604 free(sa, M_SONAME); 1605 } else { 1606 if (args->optval) { 1607 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 1608 if (error != 0) 1609 return (error); 1610 } 1611 error = kern_getsockopt(td, args->s, level, 1612 name, PTRIN(args->optval), UIO_USERSPACE, &len); 1613 if (error == 0) 1614 error = copyout(&len, PTRIN(args->optlen), 1615 sizeof(len)); 1616 } 1617 1618 return (error); 1619 } 1620 1621 static int 1622 linux_sendfile_common(struct thread *td, l_int out, l_int in, 1623 l_loff_t *offset, l_size_t count) 1624 { 1625 off_t bytes_read; 1626 int error; 1627 l_loff_t current_offset; 1628 struct file *fp; 1629 1630 AUDIT_ARG_FD(in); 1631 error = fget_read(td, in, &cap_pread_rights, &fp); 1632 if (error != 0) 1633 return (error); 1634 1635 if (offset != NULL) { 1636 current_offset = *offset; 1637 } else { 1638 error = (fp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0 ? 1639 fo_seek(fp, 0, SEEK_CUR, td) : ESPIPE; 1640 if (error != 0) 1641 goto drop; 1642 current_offset = td->td_uretoff.tdu_off; 1643 } 1644 1645 bytes_read = 0; 1646 1647 /* Linux cannot have 0 count. */ 1648 if (count <= 0 || current_offset < 0) { 1649 error = EINVAL; 1650 goto drop; 1651 } 1652 1653 error = fo_sendfile(fp, out, NULL, NULL, current_offset, count, 1654 &bytes_read, 0, td); 1655 if (error != 0) 1656 goto drop; 1657 current_offset += bytes_read; 1658 1659 if (offset != NULL) { 1660 *offset = current_offset; 1661 } else { 1662 error = fo_seek(fp, current_offset, SEEK_SET, td); 1663 if (error != 0) 1664 goto drop; 1665 } 1666 1667 td->td_retval[0] = (ssize_t)bytes_read; 1668 drop: 1669 fdrop(fp, td); 1670 return (error); 1671 } 1672 1673 int 1674 linux_sendfile(struct thread *td, struct linux_sendfile_args *arg) 1675 { 1676 /* 1677 * Differences between FreeBSD and Linux sendfile: 1678 * - Linux doesn't send anything when count is 0 (FreeBSD uses 0 to 1679 * mean send the whole file.) In linux_sendfile given fds are still 1680 * checked for validity when the count is 0. 1681 * - Linux can send to any fd whereas FreeBSD only supports sockets. 1682 * The same restriction follows for linux_sendfile. 1683 * - Linux doesn't have an equivalent for FreeBSD's flags and sf_hdtr. 1684 * - Linux takes an offset pointer and updates it to the read location. 1685 * FreeBSD takes in an offset and a 'bytes read' parameter which is 1686 * only filled if it isn't NULL. We use this parameter to update the 1687 * offset pointer if it exists. 1688 * - Linux sendfile returns bytes read on success while FreeBSD 1689 * returns 0. We use the 'bytes read' parameter to get this value. 1690 */ 1691 1692 l_loff_t offset64; 1693 l_long offset; 1694 int ret; 1695 int error; 1696 1697 if (arg->offset != NULL) { 1698 error = copyin(arg->offset, &offset, sizeof(offset)); 1699 if (error != 0) 1700 return (error); 1701 offset64 = (l_loff_t)offset; 1702 } 1703 1704 ret = linux_sendfile_common(td, arg->out, arg->in, 1705 arg->offset != NULL ? &offset64 : NULL, arg->count); 1706 1707 if (arg->offset != NULL) { 1708 #if defined(__i386__) || defined(__arm__) || \ 1709 (defined(__amd64__) && defined(COMPAT_LINUX32)) 1710 if (offset64 > INT32_MAX) 1711 return (EOVERFLOW); 1712 #endif 1713 offset = (l_long)offset64; 1714 error = copyout(&offset, arg->offset, sizeof(offset)); 1715 if (error != 0) 1716 return (error); 1717 } 1718 1719 return (ret); 1720 } 1721 1722 #if defined(__i386__) || defined(__arm__) || \ 1723 (defined(__amd64__) && defined(COMPAT_LINUX32)) 1724 1725 int 1726 linux_sendfile64(struct thread *td, struct linux_sendfile64_args *arg) 1727 { 1728 l_loff_t offset; 1729 int ret; 1730 int error; 1731 1732 if (arg->offset != NULL) { 1733 error = copyin(arg->offset, &offset, sizeof(offset)); 1734 if (error != 0) 1735 return (error); 1736 } 1737 1738 ret = linux_sendfile_common(td, arg->out, arg->in, 1739 arg->offset != NULL ? &offset : NULL, arg->count); 1740 1741 if (arg->offset != NULL) { 1742 error = copyout(&offset, arg->offset, sizeof(offset)); 1743 if (error != 0) 1744 return (error); 1745 } 1746 1747 return (ret); 1748 } 1749 1750 /* Argument list sizes for linux_socketcall */ 1751 static const unsigned char lxs_args_cnt[] = { 1752 0 /* unused*/, 3 /* socket */, 1753 3 /* bind */, 3 /* connect */, 1754 2 /* listen */, 3 /* accept */, 1755 3 /* getsockname */, 3 /* getpeername */, 1756 4 /* socketpair */, 4 /* send */, 1757 4 /* recv */, 6 /* sendto */, 1758 6 /* recvfrom */, 2 /* shutdown */, 1759 5 /* setsockopt */, 5 /* getsockopt */, 1760 3 /* sendmsg */, 3 /* recvmsg */, 1761 4 /* accept4 */, 5 /* recvmmsg */, 1762 4 /* sendmmsg */, 4 /* sendfile */ 1763 }; 1764 #define LINUX_ARGS_CNT (nitems(lxs_args_cnt) - 1) 1765 #define LINUX_ARG_SIZE(x) (lxs_args_cnt[x] * sizeof(l_ulong)) 1766 1767 int 1768 linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1769 { 1770 l_ulong a[6]; 1771 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1772 register_t l_args[6]; 1773 #endif 1774 void *arg; 1775 int error; 1776 1777 if (args->what < LINUX_SOCKET || args->what > LINUX_ARGS_CNT) 1778 return (EINVAL); 1779 error = copyin(PTRIN(args->args), a, LINUX_ARG_SIZE(args->what)); 1780 if (error != 0) 1781 return (error); 1782 1783 #if defined(__amd64__) && defined(COMPAT_LINUX32) 1784 for (int i = 0; i < lxs_args_cnt[args->what]; ++i) 1785 l_args[i] = a[i]; 1786 arg = l_args; 1787 #else 1788 arg = a; 1789 #endif 1790 switch (args->what) { 1791 case LINUX_SOCKET: 1792 return (linux_socket(td, arg)); 1793 case LINUX_BIND: 1794 return (linux_bind(td, arg)); 1795 case LINUX_CONNECT: 1796 return (linux_connect(td, arg)); 1797 case LINUX_LISTEN: 1798 return (linux_listen(td, arg)); 1799 case LINUX_ACCEPT: 1800 return (linux_accept(td, arg)); 1801 case LINUX_GETSOCKNAME: 1802 return (linux_getsockname(td, arg)); 1803 case LINUX_GETPEERNAME: 1804 return (linux_getpeername(td, arg)); 1805 case LINUX_SOCKETPAIR: 1806 return (linux_socketpair(td, arg)); 1807 case LINUX_SEND: 1808 return (linux_send(td, arg)); 1809 case LINUX_RECV: 1810 return (linux_recv(td, arg)); 1811 case LINUX_SENDTO: 1812 return (linux_sendto(td, arg)); 1813 case LINUX_RECVFROM: 1814 return (linux_recvfrom(td, arg)); 1815 case LINUX_SHUTDOWN: 1816 return (linux_shutdown(td, arg)); 1817 case LINUX_SETSOCKOPT: 1818 return (linux_setsockopt(td, arg)); 1819 case LINUX_GETSOCKOPT: 1820 return (linux_getsockopt(td, arg)); 1821 case LINUX_SENDMSG: 1822 return (linux_sendmsg(td, arg)); 1823 case LINUX_RECVMSG: 1824 return (linux_recvmsg(td, arg)); 1825 case LINUX_ACCEPT4: 1826 return (linux_accept4(td, arg)); 1827 case LINUX_RECVMMSG: 1828 return (linux_recvmmsg(td, arg)); 1829 case LINUX_SENDMMSG: 1830 return (linux_sendmmsg(td, arg)); 1831 case LINUX_SENDFILE: 1832 return (linux_sendfile(td, arg)); 1833 } 1834 1835 linux_msg(td, "socket type %d not implemented", args->what); 1836 return (ENOSYS); 1837 } 1838 #endif /* __i386__ || __arm__ || (__amd64__ && COMPAT_LINUX32) */ 1839