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