Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_socket.c
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1 /*- 2 * Copyright (c) 1995 Søren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD: releng/11.0/sys/compat/linux/linux_socket.c 302213 2016-06-26 16:59:59Z dchagin $"); 31 32 /* XXX we use functions that might not exist. */ 33 #include "opt_compat.h" 34 #include "opt_inet6.h" 35 36 #include <sys/param.h> 37 #include <sys/proc.h> 38 #include <sys/systm.h> 39 #include <sys/sysproto.h> 40 #include <sys/capsicum.h> 41 #include <sys/fcntl.h> 42 #include <sys/file.h> 43 #include <sys/limits.h> 44 #include <sys/lock.h> 45 #include <sys/malloc.h> 46 #include <sys/mutex.h> 47 #include <sys/mbuf.h> 48 #include <sys/socket.h> 49 #include <sys/socketvar.h> 50 #include <sys/syscallsubr.h> 51 #include <sys/uio.h> 52 #include <sys/syslog.h> 53 #include <sys/un.h> 54 55 #include <net/if.h> 56 #include <net/vnet.h> 57 #include <netinet/in.h> 58 #include <netinet/in_systm.h> 59 #include <netinet/ip.h> 60 #include <netinet/tcp.h> 61 #ifdef INET6 62 #include <netinet/ip6.h> 63 #include <netinet6/ip6_var.h> 64 #endif 65 66 #ifdef COMPAT_LINUX32 67 #include <machine/../linux32/linux.h> 68 #include <machine/../linux32/linux32_proto.h> 69 #else 70 #include <machine/../linux/linux.h> 71 #include <machine/../linux/linux_proto.h> 72 #endif 73 #include <compat/linux/linux_file.h> 74 #include <compat/linux/linux_socket.h> 75 #include <compat/linux/linux_timer.h> 76 #include <compat/linux/linux_util.h> 77 78 static int linux_to_bsd_domain(int); 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 * Reads a linux sockaddr and does any necessary translation. 87 * Linux sockaddrs don't have a length field, only a family. 88 * Copy the osockaddr structure pointed to by osa to kernel, adjust 89 * family and convert to sockaddr. 90 */ 91 static int 92 linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen) 93 { 94 struct sockaddr *sa; 95 struct osockaddr *kosa; 96 #ifdef INET6 97 struct sockaddr_in6 *sin6; 98 int oldv6size; 99 #endif 100 char *name; 101 int bdom, error, hdrlen, namelen; 102 103 if (salen < 2 || salen > UCHAR_MAX || !osa) 104 return (EINVAL); 105 106 #ifdef INET6 107 oldv6size = 0; 108 /* 109 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it 110 * if it's a v4-mapped address, so reserve the proper space 111 * for it. 112 */ 113 if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { 114 salen += sizeof(uint32_t); 115 oldv6size = 1; 116 } 117 #endif 118 119 kosa = malloc(salen, M_SONAME, M_WAITOK); 120 121 if ((error = copyin(osa, kosa, salen))) 122 goto out; 123 124 bdom = linux_to_bsd_domain(kosa->sa_family); 125 if (bdom == -1) { 126 error = EAFNOSUPPORT; 127 goto out; 128 } 129 130 #ifdef INET6 131 /* 132 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 133 * which lacks the scope id compared with RFC2553 one. If we detect 134 * the situation, reject the address and write a message to system log. 135 * 136 * Still accept addresses for which the scope id is not used. 137 */ 138 if (oldv6size) { 139 if (bdom == AF_INET6) { 140 sin6 = (struct sockaddr_in6 *)kosa; 141 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 142 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 143 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 144 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && 145 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 146 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 147 sin6->sin6_scope_id = 0; 148 } else { 149 log(LOG_DEBUG, 150 "obsolete pre-RFC2553 sockaddr_in6 rejected\n"); 151 error = EINVAL; 152 goto out; 153 } 154 } else 155 salen -= sizeof(uint32_t); 156 } 157 #endif 158 if (bdom == AF_INET) { 159 if (salen < sizeof(struct sockaddr_in)) { 160 error = EINVAL; 161 goto out; 162 } 163 salen = sizeof(struct sockaddr_in); 164 } 165 166 if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) { 167 hdrlen = offsetof(struct sockaddr_un, sun_path); 168 name = ((struct sockaddr_un *)kosa)->sun_path; 169 if (*name == '\0') { 170 /* 171 * Linux abstract namespace starts with a NULL byte. 172 * XXX We do not support abstract namespace yet. 173 */ 174 namelen = strnlen(name + 1, salen - hdrlen - 1) + 1; 175 } else 176 namelen = strnlen(name, salen - hdrlen); 177 salen = hdrlen + namelen; 178 if (salen > sizeof(struct sockaddr_un)) { 179 error = ENAMETOOLONG; 180 goto out; 181 } 182 } 183 184 sa = (struct sockaddr *)kosa; 185 sa->sa_family = bdom; 186 sa->sa_len = salen; 187 188 *sap = sa; 189 return (0); 190 191 out: 192 free(kosa, M_SONAME); 193 return (error); 194 } 195 196 static int 197 linux_to_bsd_domain(int domain) 198 { 199 200 switch (domain) { 201 case LINUX_AF_UNSPEC: 202 return (AF_UNSPEC); 203 case LINUX_AF_UNIX: 204 return (AF_LOCAL); 205 case LINUX_AF_INET: 206 return (AF_INET); 207 case LINUX_AF_INET6: 208 return (AF_INET6); 209 case LINUX_AF_AX25: 210 return (AF_CCITT); 211 case LINUX_AF_IPX: 212 return (AF_IPX); 213 case LINUX_AF_APPLETALK: 214 return (AF_APPLETALK); 215 } 216 return (-1); 217 } 218 219 static int 220 bsd_to_linux_domain(int domain) 221 { 222 223 switch (domain) { 224 case AF_UNSPEC: 225 return (LINUX_AF_UNSPEC); 226 case AF_LOCAL: 227 return (LINUX_AF_UNIX); 228 case AF_INET: 229 return (LINUX_AF_INET); 230 case AF_INET6: 231 return (LINUX_AF_INET6); 232 case AF_CCITT: 233 return (LINUX_AF_AX25); 234 case AF_IPX: 235 return (LINUX_AF_IPX); 236 case AF_APPLETALK: 237 return (LINUX_AF_APPLETALK); 238 } 239 return (-1); 240 } 241 242 static int 243 linux_to_bsd_sockopt_level(int level) 244 { 245 246 switch (level) { 247 case LINUX_SOL_SOCKET: 248 return (SOL_SOCKET); 249 } 250 return (level); 251 } 252 253 static int 254 bsd_to_linux_sockopt_level(int level) 255 { 256 257 switch (level) { 258 case SOL_SOCKET: 259 return (LINUX_SOL_SOCKET); 260 } 261 return (level); 262 } 263 264 static int 265 linux_to_bsd_ip_sockopt(int opt) 266 { 267 268 switch (opt) { 269 case LINUX_IP_TOS: 270 return (IP_TOS); 271 case LINUX_IP_TTL: 272 return (IP_TTL); 273 case LINUX_IP_OPTIONS: 274 return (IP_OPTIONS); 275 case LINUX_IP_MULTICAST_IF: 276 return (IP_MULTICAST_IF); 277 case LINUX_IP_MULTICAST_TTL: 278 return (IP_MULTICAST_TTL); 279 case LINUX_IP_MULTICAST_LOOP: 280 return (IP_MULTICAST_LOOP); 281 case LINUX_IP_ADD_MEMBERSHIP: 282 return (IP_ADD_MEMBERSHIP); 283 case LINUX_IP_DROP_MEMBERSHIP: 284 return (IP_DROP_MEMBERSHIP); 285 case LINUX_IP_HDRINCL: 286 return (IP_HDRINCL); 287 } 288 return (-1); 289 } 290 291 static int 292 linux_to_bsd_ip6_sockopt(int opt) 293 { 294 295 switch (opt) { 296 case LINUX_IPV6_NEXTHOP: 297 return (IPV6_NEXTHOP); 298 case LINUX_IPV6_UNICAST_HOPS: 299 return (IPV6_UNICAST_HOPS); 300 case LINUX_IPV6_MULTICAST_IF: 301 return (IPV6_MULTICAST_IF); 302 case LINUX_IPV6_MULTICAST_HOPS: 303 return (IPV6_MULTICAST_HOPS); 304 case LINUX_IPV6_MULTICAST_LOOP: 305 return (IPV6_MULTICAST_LOOP); 306 case LINUX_IPV6_ADD_MEMBERSHIP: 307 return (IPV6_JOIN_GROUP); 308 case LINUX_IPV6_DROP_MEMBERSHIP: 309 return (IPV6_LEAVE_GROUP); 310 case LINUX_IPV6_V6ONLY: 311 return (IPV6_V6ONLY); 312 case LINUX_IPV6_DONTFRAG: 313 return (IPV6_DONTFRAG); 314 #if 0 315 case LINUX_IPV6_CHECKSUM: 316 return (IPV6_CHECKSUM); 317 case LINUX_IPV6_RECVPKTINFO: 318 return (IPV6_RECVPKTINFO); 319 case LINUX_IPV6_PKTINFO: 320 return (IPV6_PKTINFO); 321 case LINUX_IPV6_RECVHOPLIMIT: 322 return (IPV6_RECVHOPLIMIT); 323 case LINUX_IPV6_HOPLIMIT: 324 return (IPV6_HOPLIMIT); 325 case LINUX_IPV6_RECVHOPOPTS: 326 return (IPV6_RECVHOPOPTS); 327 case LINUX_IPV6_HOPOPTS: 328 return (IPV6_HOPOPTS); 329 case LINUX_IPV6_RTHDRDSTOPTS: 330 return (IPV6_RTHDRDSTOPTS); 331 case LINUX_IPV6_RECVRTHDR: 332 return (IPV6_RECVRTHDR); 333 case LINUX_IPV6_RTHDR: 334 return (IPV6_RTHDR); 335 case LINUX_IPV6_RECVDSTOPTS: 336 return (IPV6_RECVDSTOPTS); 337 case LINUX_IPV6_DSTOPTS: 338 return (IPV6_DSTOPTS); 339 case LINUX_IPV6_RECVPATHMTU: 340 return (IPV6_RECVPATHMTU); 341 case LINUX_IPV6_PATHMTU: 342 return (IPV6_PATHMTU); 343 #endif 344 } 345 return (-1); 346 } 347 348 static int 349 linux_to_bsd_so_sockopt(int opt) 350 { 351 352 switch (opt) { 353 case LINUX_SO_DEBUG: 354 return (SO_DEBUG); 355 case LINUX_SO_REUSEADDR: 356 return (SO_REUSEADDR); 357 case LINUX_SO_TYPE: 358 return (SO_TYPE); 359 case LINUX_SO_ERROR: 360 return (SO_ERROR); 361 case LINUX_SO_DONTROUTE: 362 return (SO_DONTROUTE); 363 case LINUX_SO_BROADCAST: 364 return (SO_BROADCAST); 365 case LINUX_SO_SNDBUF: 366 return (SO_SNDBUF); 367 case LINUX_SO_RCVBUF: 368 return (SO_RCVBUF); 369 case LINUX_SO_KEEPALIVE: 370 return (SO_KEEPALIVE); 371 case LINUX_SO_OOBINLINE: 372 return (SO_OOBINLINE); 373 case LINUX_SO_LINGER: 374 return (SO_LINGER); 375 case LINUX_SO_PEERCRED: 376 return (LOCAL_PEERCRED); 377 case LINUX_SO_RCVLOWAT: 378 return (SO_RCVLOWAT); 379 case LINUX_SO_SNDLOWAT: 380 return (SO_SNDLOWAT); 381 case LINUX_SO_RCVTIMEO: 382 return (SO_RCVTIMEO); 383 case LINUX_SO_SNDTIMEO: 384 return (SO_SNDTIMEO); 385 case LINUX_SO_TIMESTAMP: 386 return (SO_TIMESTAMP); 387 case LINUX_SO_ACCEPTCONN: 388 return (SO_ACCEPTCONN); 389 } 390 return (-1); 391 } 392 393 static int 394 linux_to_bsd_tcp_sockopt(int opt) 395 { 396 397 switch (opt) { 398 case LINUX_TCP_NODELAY: 399 return (TCP_NODELAY); 400 case LINUX_TCP_MAXSEG: 401 return (TCP_MAXSEG); 402 case LINUX_TCP_KEEPIDLE: 403 return (TCP_KEEPIDLE); 404 case LINUX_TCP_KEEPINTVL: 405 return (TCP_KEEPINTVL); 406 case LINUX_TCP_KEEPCNT: 407 return (TCP_KEEPCNT); 408 case LINUX_TCP_MD5SIG: 409 return (TCP_MD5SIG); 410 } 411 return (-1); 412 } 413 414 static int 415 linux_to_bsd_msg_flags(int flags) 416 { 417 int ret_flags = 0; 418 419 if (flags & LINUX_MSG_OOB) 420 ret_flags |= MSG_OOB; 421 if (flags & LINUX_MSG_PEEK) 422 ret_flags |= MSG_PEEK; 423 if (flags & LINUX_MSG_DONTROUTE) 424 ret_flags |= MSG_DONTROUTE; 425 if (flags & LINUX_MSG_CTRUNC) 426 ret_flags |= MSG_CTRUNC; 427 if (flags & LINUX_MSG_TRUNC) 428 ret_flags |= MSG_TRUNC; 429 if (flags & LINUX_MSG_DONTWAIT) 430 ret_flags |= MSG_DONTWAIT; 431 if (flags & LINUX_MSG_EOR) 432 ret_flags |= MSG_EOR; 433 if (flags & LINUX_MSG_WAITALL) 434 ret_flags |= MSG_WAITALL; 435 if (flags & LINUX_MSG_NOSIGNAL) 436 ret_flags |= MSG_NOSIGNAL; 437 #if 0 /* not handled */ 438 if (flags & LINUX_MSG_PROXY) 439 ; 440 if (flags & LINUX_MSG_FIN) 441 ; 442 if (flags & LINUX_MSG_SYN) 443 ; 444 if (flags & LINUX_MSG_CONFIRM) 445 ; 446 if (flags & LINUX_MSG_RST) 447 ; 448 if (flags & LINUX_MSG_ERRQUEUE) 449 ; 450 #endif 451 return (ret_flags); 452 } 453 454 /* 455 * If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the 456 * native syscall will fault. Thus, we don't really need to check the 457 * return values for these functions. 458 */ 459 460 static int 461 bsd_to_linux_sockaddr(struct sockaddr *arg) 462 { 463 struct sockaddr sa; 464 size_t sa_len = sizeof(struct sockaddr); 465 int error, bdom; 466 467 if ((error = copyin(arg, &sa, sa_len))) 468 return (error); 469 470 bdom = bsd_to_linux_domain(sa.sa_family); 471 if (bdom == -1) 472 return (EAFNOSUPPORT); 473 474 *(u_short *)&sa = bdom; 475 return (copyout(&sa, arg, sa_len)); 476 } 477 478 static int 479 linux_to_bsd_sockaddr(struct sockaddr *arg, int len) 480 { 481 struct sockaddr sa; 482 size_t sa_len = sizeof(struct sockaddr); 483 int error, bdom; 484 485 if ((error = copyin(arg, &sa, sa_len))) 486 return (error); 487 488 bdom = linux_to_bsd_domain(*(sa_family_t *)&sa); 489 if (bdom == -1) 490 return (EAFNOSUPPORT); 491 492 sa.sa_family = bdom; 493 sa.sa_len = len; 494 return (copyout(&sa, arg, sa_len)); 495 } 496 497 static int 498 linux_sa_put(struct osockaddr *osa) 499 { 500 struct osockaddr sa; 501 int error, bdom; 502 503 /* 504 * Only read/write the osockaddr family part, the rest is 505 * not changed. 506 */ 507 error = copyin(osa, &sa, sizeof(sa.sa_family)); 508 if (error) 509 return (error); 510 511 bdom = bsd_to_linux_domain(sa.sa_family); 512 if (bdom == -1) 513 return (EINVAL); 514 515 sa.sa_family = bdom; 516 return (copyout(&sa, osa, sizeof(sa.sa_family))); 517 } 518 519 static int 520 linux_to_bsd_cmsg_type(int cmsg_type) 521 { 522 523 switch (cmsg_type) { 524 case LINUX_SCM_RIGHTS: 525 return (SCM_RIGHTS); 526 case LINUX_SCM_CREDENTIALS: 527 return (SCM_CREDS); 528 } 529 return (-1); 530 } 531 532 static int 533 bsd_to_linux_cmsg_type(int cmsg_type) 534 { 535 536 switch (cmsg_type) { 537 case SCM_RIGHTS: 538 return (LINUX_SCM_RIGHTS); 539 case SCM_CREDS: 540 return (LINUX_SCM_CREDENTIALS); 541 case SCM_TIMESTAMP: 542 return (LINUX_SCM_TIMESTAMP); 543 } 544 return (-1); 545 } 546 547 static int 548 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 549 { 550 if (lhdr->msg_controllen > INT_MAX) 551 return (ENOBUFS); 552 553 bhdr->msg_name = PTRIN(lhdr->msg_name); 554 bhdr->msg_namelen = lhdr->msg_namelen; 555 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 556 bhdr->msg_iovlen = lhdr->msg_iovlen; 557 bhdr->msg_control = PTRIN(lhdr->msg_control); 558 559 /* 560 * msg_controllen is skipped since BSD and LINUX control messages 561 * are potentially different sizes (e.g. the cred structure used 562 * by SCM_CREDS is different between the two operating system). 563 * 564 * The caller can set it (if necessary) after converting all the 565 * control messages. 566 */ 567 568 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 569 return (0); 570 } 571 572 static int 573 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 574 { 575 lhdr->msg_name = PTROUT(bhdr->msg_name); 576 lhdr->msg_namelen = bhdr->msg_namelen; 577 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 578 lhdr->msg_iovlen = bhdr->msg_iovlen; 579 lhdr->msg_control = PTROUT(bhdr->msg_control); 580 581 /* 582 * msg_controllen is skipped since BSD and LINUX control messages 583 * are potentially different sizes (e.g. the cred structure used 584 * by SCM_CREDS is different between the two operating system). 585 * 586 * The caller can set it (if necessary) after converting all the 587 * control messages. 588 */ 589 590 /* msg_flags skipped */ 591 return (0); 592 } 593 594 static int 595 linux_set_socket_flags(int lflags, int *flags) 596 { 597 598 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 599 return (EINVAL); 600 if (lflags & LINUX_SOCK_NONBLOCK) 601 *flags |= SOCK_NONBLOCK; 602 if (lflags & LINUX_SOCK_CLOEXEC) 603 *flags |= SOCK_CLOEXEC; 604 return (0); 605 } 606 607 static int 608 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 609 struct mbuf *control, enum uio_seg segflg) 610 { 611 struct sockaddr *to; 612 int error; 613 614 if (mp->msg_name != NULL) { 615 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); 616 if (error) 617 return (error); 618 mp->msg_name = to; 619 } else 620 to = NULL; 621 622 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 623 segflg); 624 625 if (to) 626 free(to, M_SONAME); 627 return (error); 628 } 629 630 /* Return 0 if IP_HDRINCL is set for the given socket. */ 631 static int 632 linux_check_hdrincl(struct thread *td, int s) 633 { 634 int error, optval; 635 socklen_t size_val; 636 637 size_val = sizeof(optval); 638 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 639 &optval, UIO_SYSSPACE, &size_val); 640 if (error) 641 return (error); 642 643 return (optval == 0); 644 } 645 646 /* 647 * Updated sendto() when IP_HDRINCL is set: 648 * tweak endian-dependent fields in the IP packet. 649 */ 650 static int 651 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 652 { 653 /* 654 * linux_ip_copysize defines how many bytes we should copy 655 * from the beginning of the IP packet before we customize it for BSD. 656 * It should include all the fields we modify (ip_len and ip_off). 657 */ 658 #define linux_ip_copysize 8 659 660 struct ip *packet; 661 struct msghdr msg; 662 struct iovec aiov[1]; 663 int error; 664 665 /* Check that the packet isn't too big or too small. */ 666 if (linux_args->len < linux_ip_copysize || 667 linux_args->len > IP_MAXPACKET) 668 return (EINVAL); 669 670 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK); 671 672 /* Make kernel copy of the packet to be sent */ 673 if ((error = copyin(PTRIN(linux_args->msg), packet, 674 linux_args->len))) 675 goto goout; 676 677 /* Convert fields from Linux to BSD raw IP socket format */ 678 packet->ip_len = linux_args->len; 679 packet->ip_off = ntohs(packet->ip_off); 680 681 /* Prepare the msghdr and iovec structures describing the new packet */ 682 msg.msg_name = PTRIN(linux_args->to); 683 msg.msg_namelen = linux_args->tolen; 684 msg.msg_iov = aiov; 685 msg.msg_iovlen = 1; 686 msg.msg_control = NULL; 687 msg.msg_flags = 0; 688 aiov[0].iov_base = (char *)packet; 689 aiov[0].iov_len = linux_args->len; 690 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 691 NULL, UIO_SYSSPACE); 692 goout: 693 free(packet, M_LINUX); 694 return (error); 695 } 696 697 int 698 linux_socket(struct thread *td, struct linux_socket_args *args) 699 { 700 struct socket_args /* { 701 int domain; 702 int type; 703 int protocol; 704 } */ bsd_args; 705 int retval_socket; 706 707 bsd_args.protocol = args->protocol; 708 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 709 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 710 return (EINVAL); 711 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 712 &bsd_args.type); 713 if (retval_socket != 0) 714 return (retval_socket); 715 bsd_args.domain = linux_to_bsd_domain(args->domain); 716 if (bsd_args.domain == -1) 717 return (EAFNOSUPPORT); 718 719 retval_socket = sys_socket(td, &bsd_args); 720 if (retval_socket) 721 return (retval_socket); 722 723 if (bsd_args.type == SOCK_RAW 724 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) 725 && bsd_args.domain == PF_INET) { 726 /* It's a raw IP socket: set the IP_HDRINCL option. */ 727 int hdrincl; 728 729 hdrincl = 1; 730 /* We ignore any error returned by kern_setsockopt() */ 731 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 732 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 733 } 734 #ifdef INET6 735 /* 736 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 737 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 738 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 739 * sysctl value. 740 */ 741 if (bsd_args.domain == PF_INET6) { 742 int v6only; 743 744 v6only = 0; 745 /* We ignore any error returned by setsockopt() */ 746 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 747 &v6only, UIO_SYSSPACE, sizeof(v6only)); 748 } 749 #endif 750 751 return (retval_socket); 752 } 753 754 int 755 linux_bind(struct thread *td, struct linux_bind_args *args) 756 { 757 struct sockaddr *sa; 758 int error; 759 760 error = linux_getsockaddr(&sa, PTRIN(args->name), 761 args->namelen); 762 if (error) 763 return (error); 764 765 error = kern_bindat(td, AT_FDCWD, args->s, sa); 766 free(sa, M_SONAME); 767 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 768 return (EINVAL); 769 return (error); 770 } 771 772 int 773 linux_connect(struct thread *td, struct linux_connect_args *args) 774 { 775 cap_rights_t rights; 776 struct socket *so; 777 struct sockaddr *sa; 778 u_int fflag; 779 int error; 780 781 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), 782 args->namelen); 783 if (error) 784 return (error); 785 786 error = kern_connectat(td, AT_FDCWD, args->s, sa); 787 free(sa, M_SONAME); 788 if (error != EISCONN) 789 return (error); 790 791 /* 792 * Linux doesn't return EISCONN the first time it occurs, 793 * when on a non-blocking socket. Instead it returns the 794 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 795 * 796 * XXXRW: Instead of using fgetsock(), check that it is a 797 * socket and use the file descriptor reference instead of 798 * creating a new one. 799 */ 800 error = fgetsock(td, args->s, cap_rights_init(&rights, CAP_CONNECT), 801 &so, &fflag); 802 if (error == 0) { 803 error = EISCONN; 804 if (fflag & FNONBLOCK) { 805 SOCK_LOCK(so); 806 if (so->so_emuldata == 0) 807 error = so->so_error; 808 so->so_emuldata = (void *)1; 809 SOCK_UNLOCK(so); 810 } 811 fputsock(so); 812 } 813 return (error); 814 } 815 816 int 817 linux_listen(struct thread *td, struct linux_listen_args *args) 818 { 819 struct listen_args /* { 820 int s; 821 int backlog; 822 } */ bsd_args; 823 824 bsd_args.s = args->s; 825 bsd_args.backlog = args->backlog; 826 return (sys_listen(td, &bsd_args)); 827 } 828 829 static int 830 linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 831 l_uintptr_t namelen, int flags) 832 { 833 struct accept4_args /* { 834 int s; 835 struct sockaddr * __restrict name; 836 socklen_t * __restrict anamelen; 837 int flags; 838 } */ bsd_args; 839 cap_rights_t rights; 840 struct socket *so; 841 struct file *fp; 842 int error, error1; 843 844 bsd_args.s = s; 845 /* XXX: */ 846 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); 847 bsd_args.anamelen = PTRIN(namelen);/* XXX */ 848 bsd_args.flags = 0; 849 error = linux_set_socket_flags(flags, &bsd_args.flags); 850 if (error != 0) 851 return (error); 852 error = sys_accept4(td, &bsd_args); 853 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); 854 if (error) { 855 if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) 856 return (EINVAL); 857 if (error == EINVAL) { 858 error1 = getsock_cap(td, s, &rights, &fp, NULL); 859 if (error1 != 0) 860 return (error1); 861 so = fp->f_data; 862 if (so->so_type == SOCK_DGRAM) { 863 fdrop(fp, td); 864 return (EOPNOTSUPP); 865 } 866 fdrop(fp, td); 867 } 868 return (error); 869 } 870 if (addr) 871 error = linux_sa_put(PTRIN(addr)); 872 if (error) { 873 (void)kern_close(td, td->td_retval[0]); 874 td->td_retval[0] = 0; 875 } 876 return (error); 877 } 878 879 int 880 linux_accept(struct thread *td, struct linux_accept_args *args) 881 { 882 883 return (linux_accept_common(td, args->s, args->addr, 884 args->namelen, 0)); 885 } 886 887 int 888 linux_accept4(struct thread *td, struct linux_accept4_args *args) 889 { 890 891 return (linux_accept_common(td, args->s, args->addr, 892 args->namelen, args->flags)); 893 } 894 895 int 896 linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 897 { 898 struct getsockname_args /* { 899 int fdes; 900 struct sockaddr * __restrict asa; 901 socklen_t * __restrict alen; 902 } */ bsd_args; 903 int error; 904 905 bsd_args.fdes = args->s; 906 /* XXX: */ 907 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); 908 bsd_args.alen = PTRIN(args->namelen); /* XXX */ 909 error = sys_getsockname(td, &bsd_args); 910 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 911 if (error) 912 return (error); 913 return (linux_sa_put(PTRIN(args->addr))); 914 } 915 916 int 917 linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 918 { 919 struct getpeername_args /* { 920 int fdes; 921 caddr_t asa; 922 int *alen; 923 } */ bsd_args; 924 int error; 925 926 bsd_args.fdes = args->s; 927 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); 928 bsd_args.alen = (socklen_t *)PTRIN(args->namelen); 929 error = sys_getpeername(td, &bsd_args); 930 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 931 if (error) 932 return (error); 933 return (linux_sa_put(PTRIN(args->addr))); 934 } 935 936 int 937 linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 938 { 939 struct socketpair_args /* { 940 int domain; 941 int type; 942 int protocol; 943 int *rsv; 944 } */ bsd_args; 945 int error; 946 947 bsd_args.domain = linux_to_bsd_domain(args->domain); 948 if (bsd_args.domain != PF_LOCAL) 949 return (EAFNOSUPPORT); 950 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 951 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 952 return (EINVAL); 953 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 954 &bsd_args.type); 955 if (error != 0) 956 return (error); 957 if (args->protocol != 0 && args->protocol != PF_UNIX) 958 959 /* 960 * Use of PF_UNIX as protocol argument is not right, 961 * but Linux does it. 962 * Do not map PF_UNIX as its Linux value is identical 963 * to FreeBSD one. 964 */ 965 return (EPROTONOSUPPORT); 966 else 967 bsd_args.protocol = 0; 968 bsd_args.rsv = (int *)PTRIN(args->rsv); 969 return (sys_socketpair(td, &bsd_args)); 970 } 971 972 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 973 struct linux_send_args { 974 int s; 975 l_uintptr_t msg; 976 int len; 977 int flags; 978 }; 979 980 static int 981 linux_send(struct thread *td, struct linux_send_args *args) 982 { 983 struct sendto_args /* { 984 int s; 985 caddr_t buf; 986 int len; 987 int flags; 988 caddr_t to; 989 int tolen; 990 } */ bsd_args; 991 992 bsd_args.s = args->s; 993 bsd_args.buf = (caddr_t)PTRIN(args->msg); 994 bsd_args.len = args->len; 995 bsd_args.flags = args->flags; 996 bsd_args.to = NULL; 997 bsd_args.tolen = 0; 998 return (sys_sendto(td, &bsd_args)); 999 } 1000 1001 struct linux_recv_args { 1002 int s; 1003 l_uintptr_t msg; 1004 int len; 1005 int flags; 1006 }; 1007 1008 static int 1009 linux_recv(struct thread *td, struct linux_recv_args *args) 1010 { 1011 struct recvfrom_args /* { 1012 int s; 1013 caddr_t buf; 1014 int len; 1015 int flags; 1016 struct sockaddr *from; 1017 socklen_t fromlenaddr; 1018 } */ bsd_args; 1019 1020 bsd_args.s = args->s; 1021 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1022 bsd_args.len = args->len; 1023 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1024 bsd_args.from = NULL; 1025 bsd_args.fromlenaddr = 0; 1026 return (sys_recvfrom(td, &bsd_args)); 1027 } 1028 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1029 1030 int 1031 linux_sendto(struct thread *td, struct linux_sendto_args *args) 1032 { 1033 struct msghdr msg; 1034 struct iovec aiov; 1035 1036 if (linux_check_hdrincl(td, args->s) == 0) 1037 /* IP_HDRINCL set, tweak the packet before sending */ 1038 return (linux_sendto_hdrincl(td, args)); 1039 1040 msg.msg_name = PTRIN(args->to); 1041 msg.msg_namelen = args->tolen; 1042 msg.msg_iov = &aiov; 1043 msg.msg_iovlen = 1; 1044 msg.msg_control = NULL; 1045 msg.msg_flags = 0; 1046 aiov.iov_base = PTRIN(args->msg); 1047 aiov.iov_len = args->len; 1048 return (linux_sendit(td, args->s, &msg, args->flags, NULL, 1049 UIO_USERSPACE)); 1050 } 1051 1052 int 1053 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1054 { 1055 struct msghdr msg; 1056 struct iovec aiov; 1057 int error, fromlen; 1058 1059 if (PTRIN(args->fromlen) != NULL) { 1060 error = copyin(PTRIN(args->fromlen), &fromlen, 1061 sizeof(fromlen)); 1062 if (error != 0) 1063 return (error); 1064 if (fromlen < 0) 1065 return (EINVAL); 1066 msg.msg_namelen = fromlen; 1067 } else 1068 msg.msg_namelen = 0; 1069 1070 msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from); 1071 msg.msg_iov = &aiov; 1072 msg.msg_iovlen = 1; 1073 aiov.iov_base = PTRIN(args->buf); 1074 aiov.iov_len = args->len; 1075 msg.msg_control = 0; 1076 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1077 1078 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL); 1079 if (error != 0) 1080 return (error); 1081 1082 if (PTRIN(args->from) != NULL) { 1083 error = bsd_to_linux_sockaddr((struct sockaddr *) 1084 PTRIN(args->from)); 1085 if (error != 0) 1086 return (error); 1087 1088 error = linux_sa_put((struct osockaddr *) 1089 PTRIN(args->from)); 1090 } 1091 1092 if (PTRIN(args->fromlen) != NULL) 1093 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1094 sizeof(msg.msg_namelen)); 1095 1096 return (error); 1097 } 1098 1099 static int 1100 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1101 l_uint flags) 1102 { 1103 struct cmsghdr *cmsg; 1104 struct cmsgcred cmcred; 1105 struct mbuf *control; 1106 struct msghdr msg; 1107 struct l_cmsghdr linux_cmsg; 1108 struct l_cmsghdr *ptr_cmsg; 1109 struct l_msghdr linux_msg; 1110 struct iovec *iov; 1111 socklen_t datalen; 1112 struct sockaddr *sa; 1113 sa_family_t sa_family; 1114 void *data; 1115 int error; 1116 1117 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1118 if (error != 0) 1119 return (error); 1120 1121 /* 1122 * Some Linux applications (ping) define a non-NULL control data 1123 * pointer, but a msg_controllen of 0, which is not allowed in the 1124 * FreeBSD system call interface. NULL the msg_control pointer in 1125 * order to handle this case. This should be checked, but allows the 1126 * Linux ping to work. 1127 */ 1128 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) 1129 linux_msg.msg_control = PTROUT(NULL); 1130 1131 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1132 if (error != 0) 1133 return (error); 1134 1135 #ifdef COMPAT_LINUX32 1136 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1137 &iov, EMSGSIZE); 1138 #else 1139 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1140 #endif 1141 if (error != 0) 1142 return (error); 1143 1144 control = NULL; 1145 cmsg = NULL; 1146 1147 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { 1148 error = kern_getsockname(td, s, &sa, &datalen); 1149 if (error != 0) 1150 goto bad; 1151 sa_family = sa->sa_family; 1152 free(sa, M_SONAME); 1153 1154 error = ENOBUFS; 1155 cmsg = malloc(CMSG_HDRSZ, M_LINUX, M_WAITOK|M_ZERO); 1156 control = m_get(M_WAITOK, MT_CONTROL); 1157 1158 do { 1159 error = copyin(ptr_cmsg, &linux_cmsg, 1160 sizeof(struct l_cmsghdr)); 1161 if (error != 0) 1162 goto bad; 1163 1164 error = EINVAL; 1165 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) 1166 goto bad; 1167 1168 /* 1169 * Now we support only SCM_RIGHTS and SCM_CRED, 1170 * so return EINVAL in any other cmsg_type 1171 */ 1172 cmsg->cmsg_type = 1173 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1174 cmsg->cmsg_level = 1175 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1176 if (cmsg->cmsg_type == -1 1177 || cmsg->cmsg_level != SOL_SOCKET) 1178 goto bad; 1179 1180 /* 1181 * Some applications (e.g. pulseaudio) attempt to 1182 * send ancillary data even if the underlying protocol 1183 * doesn't support it which is not allowed in the 1184 * FreeBSD system call interface. 1185 */ 1186 if (sa_family != AF_UNIX) 1187 continue; 1188 1189 data = LINUX_CMSG_DATA(ptr_cmsg); 1190 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1191 1192 switch (cmsg->cmsg_type) 1193 { 1194 case SCM_RIGHTS: 1195 break; 1196 1197 case SCM_CREDS: 1198 data = &cmcred; 1199 datalen = sizeof(cmcred); 1200 1201 /* 1202 * The lower levels will fill in the structure 1203 */ 1204 bzero(data, datalen); 1205 break; 1206 } 1207 1208 cmsg->cmsg_len = CMSG_LEN(datalen); 1209 1210 error = ENOBUFS; 1211 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg)) 1212 goto bad; 1213 if (!m_append(control, datalen, (c_caddr_t)data)) 1214 goto bad; 1215 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); 1216 1217 if (m_length(control, NULL) == 0) { 1218 m_freem(control); 1219 control = NULL; 1220 } 1221 } 1222 1223 msg.msg_iov = iov; 1224 msg.msg_flags = 0; 1225 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1226 control = NULL; 1227 1228 bad: 1229 m_freem(control); 1230 free(iov, M_IOV); 1231 if (cmsg) 1232 free(cmsg, M_LINUX); 1233 return (error); 1234 } 1235 1236 int 1237 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1238 { 1239 1240 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1241 args->flags)); 1242 } 1243 1244 int 1245 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1246 { 1247 struct l_mmsghdr *msg; 1248 l_uint retval; 1249 int error, datagrams; 1250 1251 if (args->vlen > UIO_MAXIOV) 1252 args->vlen = UIO_MAXIOV; 1253 1254 msg = PTRIN(args->msg); 1255 datagrams = 0; 1256 while (datagrams < args->vlen) { 1257 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1258 args->flags); 1259 if (error != 0) 1260 break; 1261 1262 retval = td->td_retval[0]; 1263 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1264 if (error != 0) 1265 break; 1266 ++msg; 1267 ++datagrams; 1268 } 1269 if (error == 0) 1270 td->td_retval[0] = datagrams; 1271 return (error); 1272 } 1273 1274 static int 1275 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1276 l_uint flags, struct msghdr *msg) 1277 { 1278 struct cmsghdr *cm; 1279 struct cmsgcred *cmcred; 1280 struct l_cmsghdr *linux_cmsg = NULL; 1281 struct l_ucred linux_ucred; 1282 socklen_t datalen, outlen; 1283 struct l_msghdr linux_msg; 1284 struct iovec *iov, *uiov; 1285 struct mbuf *control = NULL; 1286 struct mbuf **controlp; 1287 struct timeval *ftmvl; 1288 l_timeval ltmvl; 1289 caddr_t outbuf; 1290 void *data; 1291 int error, i, fd, fds, *fdp; 1292 1293 error = copyin(msghdr, &linux_msg, sizeof(linux_msg)); 1294 if (error != 0) 1295 return (error); 1296 1297 error = linux_to_bsd_msghdr(msg, &linux_msg); 1298 if (error != 0) 1299 return (error); 1300 1301 #ifdef COMPAT_LINUX32 1302 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1303 &iov, EMSGSIZE); 1304 #else 1305 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1306 #endif 1307 if (error != 0) 1308 return (error); 1309 1310 if (msg->msg_name) { 1311 error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name, 1312 msg->msg_namelen); 1313 if (error != 0) 1314 goto bad; 1315 } 1316 1317 uiov = msg->msg_iov; 1318 msg->msg_iov = iov; 1319 controlp = (msg->msg_control != NULL) ? &control : NULL; 1320 error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp); 1321 msg->msg_iov = uiov; 1322 if (error != 0) 1323 goto bad; 1324 1325 error = bsd_to_linux_msghdr(msg, &linux_msg); 1326 if (error != 0) 1327 goto bad; 1328 1329 if (linux_msg.msg_name) { 1330 error = bsd_to_linux_sockaddr((struct sockaddr *) 1331 PTRIN(linux_msg.msg_name)); 1332 if (error != 0) 1333 goto bad; 1334 } 1335 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1336 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1337 if (error != 0) 1338 goto bad; 1339 } 1340 1341 outbuf = PTRIN(linux_msg.msg_control); 1342 outlen = 0; 1343 1344 if (control) { 1345 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1346 1347 msg->msg_control = mtod(control, struct cmsghdr *); 1348 msg->msg_controllen = control->m_len; 1349 1350 cm = CMSG_FIRSTHDR(msg); 1351 1352 while (cm != NULL) { 1353 linux_cmsg->cmsg_type = 1354 bsd_to_linux_cmsg_type(cm->cmsg_type); 1355 linux_cmsg->cmsg_level = 1356 bsd_to_linux_sockopt_level(cm->cmsg_level); 1357 if (linux_cmsg->cmsg_type == -1 1358 || cm->cmsg_level != SOL_SOCKET) 1359 { 1360 error = EINVAL; 1361 goto bad; 1362 } 1363 1364 data = CMSG_DATA(cm); 1365 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1366 1367 switch (cm->cmsg_type) 1368 { 1369 case SCM_RIGHTS: 1370 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1371 fds = datalen / sizeof(int); 1372 fdp = data; 1373 for (i = 0; i < fds; i++) { 1374 fd = *fdp++; 1375 (void)kern_fcntl(td, fd, 1376 F_SETFD, FD_CLOEXEC); 1377 } 1378 } 1379 break; 1380 1381 case SCM_CREDS: 1382 /* 1383 * Currently LOCAL_CREDS is never in 1384 * effect for Linux so no need to worry 1385 * about sockcred 1386 */ 1387 if (datalen != sizeof(*cmcred)) { 1388 error = EMSGSIZE; 1389 goto bad; 1390 } 1391 cmcred = (struct cmsgcred *)data; 1392 bzero(&linux_ucred, sizeof(linux_ucred)); 1393 linux_ucred.pid = cmcred->cmcred_pid; 1394 linux_ucred.uid = cmcred->cmcred_uid; 1395 linux_ucred.gid = cmcred->cmcred_gid; 1396 data = &linux_ucred; 1397 datalen = sizeof(linux_ucred); 1398 break; 1399 1400 case SCM_TIMESTAMP: 1401 if (datalen != sizeof(struct timeval)) { 1402 error = EMSGSIZE; 1403 goto bad; 1404 } 1405 ftmvl = (struct timeval *)data; 1406 ltmvl.tv_sec = ftmvl->tv_sec; 1407 ltmvl.tv_usec = ftmvl->tv_usec; 1408 data = <mvl; 1409 datalen = sizeof(ltmvl); 1410 break; 1411 } 1412 1413 if (outlen + LINUX_CMSG_LEN(datalen) > 1414 linux_msg.msg_controllen) { 1415 if (outlen == 0) { 1416 error = EMSGSIZE; 1417 goto bad; 1418 } else { 1419 linux_msg.msg_flags |= 1420 LINUX_MSG_CTRUNC; 1421 goto out; 1422 } 1423 } 1424 1425 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1426 1427 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1428 if (error) 1429 goto bad; 1430 outbuf += L_CMSG_HDRSZ; 1431 1432 error = copyout(data, outbuf, datalen); 1433 if (error) 1434 goto bad; 1435 1436 outbuf += LINUX_CMSG_ALIGN(datalen); 1437 outlen += LINUX_CMSG_LEN(datalen); 1438 1439 cm = CMSG_NXTHDR(msg, cm); 1440 } 1441 } 1442 1443 out: 1444 linux_msg.msg_controllen = outlen; 1445 error = copyout(&linux_msg, msghdr, sizeof(linux_msg)); 1446 1447 bad: 1448 free(iov, M_IOV); 1449 m_freem(control); 1450 free(linux_cmsg, M_LINUX); 1451 1452 return (error); 1453 } 1454 1455 int 1456 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1457 { 1458 struct msghdr bsd_msg; 1459 1460 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1461 args->flags, &bsd_msg)); 1462 } 1463 1464 int 1465 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1466 { 1467 struct l_mmsghdr *msg; 1468 struct msghdr bsd_msg; 1469 struct l_timespec lts; 1470 struct timespec ts, tts; 1471 l_uint retval; 1472 int error, datagrams; 1473 1474 if (args->timeout) { 1475 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1476 if (error != 0) 1477 return (error); 1478 error = linux_to_native_timespec(&ts, <s); 1479 if (error != 0) 1480 return (error); 1481 getnanotime(&tts); 1482 timespecadd(&tts, &ts); 1483 } 1484 1485 msg = PTRIN(args->msg); 1486 datagrams = 0; 1487 while (datagrams < args->vlen) { 1488 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1489 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1490 if (error != 0) 1491 break; 1492 1493 retval = td->td_retval[0]; 1494 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1495 if (error != 0) 1496 break; 1497 ++msg; 1498 ++datagrams; 1499 1500 /* 1501 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1502 */ 1503 if (args->flags & LINUX_MSG_WAITFORONE) 1504 args->flags |= LINUX_MSG_DONTWAIT; 1505 1506 /* 1507 * See BUGS section of recvmmsg(2). 1508 */ 1509 if (args->timeout) { 1510 getnanotime(&ts); 1511 timespecsub(&ts, &tts); 1512 if (!timespecisset(&ts) || ts.tv_sec > 0) 1513 break; 1514 } 1515 /* Out of band data, return right away. */ 1516 if (bsd_msg.msg_flags & MSG_OOB) 1517 break; 1518 } 1519 if (error == 0) 1520 td->td_retval[0] = datagrams; 1521 return (error); 1522 } 1523 1524 int 1525 linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1526 { 1527 struct shutdown_args /* { 1528 int s; 1529 int how; 1530 } */ bsd_args; 1531 1532 bsd_args.s = args->s; 1533 bsd_args.how = args->how; 1534 return (sys_shutdown(td, &bsd_args)); 1535 } 1536 1537 int 1538 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1539 { 1540 struct setsockopt_args /* { 1541 int s; 1542 int level; 1543 int name; 1544 caddr_t val; 1545 int valsize; 1546 } */ bsd_args; 1547 l_timeval linux_tv; 1548 struct timeval tv; 1549 int error, name; 1550 1551 bsd_args.s = args->s; 1552 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1553 switch (bsd_args.level) { 1554 case SOL_SOCKET: 1555 name = linux_to_bsd_so_sockopt(args->optname); 1556 switch (name) { 1557 case SO_RCVTIMEO: 1558 /* FALLTHROUGH */ 1559 case SO_SNDTIMEO: 1560 error = copyin(PTRIN(args->optval), &linux_tv, 1561 sizeof(linux_tv)); 1562 if (error) 1563 return (error); 1564 tv.tv_sec = linux_tv.tv_sec; 1565 tv.tv_usec = linux_tv.tv_usec; 1566 return (kern_setsockopt(td, args->s, bsd_args.level, 1567 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1568 /* NOTREACHED */ 1569 break; 1570 default: 1571 break; 1572 } 1573 break; 1574 case IPPROTO_IP: 1575 name = linux_to_bsd_ip_sockopt(args->optname); 1576 break; 1577 case IPPROTO_IPV6: 1578 name = linux_to_bsd_ip6_sockopt(args->optname); 1579 break; 1580 case IPPROTO_TCP: 1581 name = linux_to_bsd_tcp_sockopt(args->optname); 1582 break; 1583 default: 1584 name = -1; 1585 break; 1586 } 1587 if (name == -1) 1588 return (ENOPROTOOPT); 1589 1590 bsd_args.name = name; 1591 bsd_args.val = PTRIN(args->optval); 1592 bsd_args.valsize = args->optlen; 1593 1594 if (name == IPV6_NEXTHOP) { 1595 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1596 bsd_args.valsize); 1597 error = sys_setsockopt(td, &bsd_args); 1598 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1599 } else 1600 error = sys_setsockopt(td, &bsd_args); 1601 1602 return (error); 1603 } 1604 1605 int 1606 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1607 { 1608 struct getsockopt_args /* { 1609 int s; 1610 int level; 1611 int name; 1612 caddr_t val; 1613 int *avalsize; 1614 } */ bsd_args; 1615 l_timeval linux_tv; 1616 struct timeval tv; 1617 socklen_t tv_len, xulen, len; 1618 struct xucred xu; 1619 struct l_ucred lxu; 1620 int error, name, newval; 1621 1622 bsd_args.s = args->s; 1623 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1624 switch (bsd_args.level) { 1625 case SOL_SOCKET: 1626 name = linux_to_bsd_so_sockopt(args->optname); 1627 switch (name) { 1628 case SO_RCVTIMEO: 1629 /* FALLTHROUGH */ 1630 case SO_SNDTIMEO: 1631 tv_len = sizeof(tv); 1632 error = kern_getsockopt(td, args->s, bsd_args.level, 1633 name, &tv, UIO_SYSSPACE, &tv_len); 1634 if (error) 1635 return (error); 1636 linux_tv.tv_sec = tv.tv_sec; 1637 linux_tv.tv_usec = tv.tv_usec; 1638 return (copyout(&linux_tv, PTRIN(args->optval), 1639 sizeof(linux_tv))); 1640 /* NOTREACHED */ 1641 break; 1642 case LOCAL_PEERCRED: 1643 if (args->optlen != sizeof(lxu)) 1644 return (EINVAL); 1645 xulen = sizeof(xu); 1646 error = kern_getsockopt(td, args->s, bsd_args.level, 1647 name, &xu, UIO_SYSSPACE, &xulen); 1648 if (error) 1649 return (error); 1650 /* 1651 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1652 */ 1653 lxu.pid = 0; 1654 lxu.uid = xu.cr_uid; 1655 lxu.gid = xu.cr_gid; 1656 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1657 /* NOTREACHED */ 1658 break; 1659 case SO_ERROR: 1660 len = sizeof(newval); 1661 error = kern_getsockopt(td, args->s, bsd_args.level, 1662 name, &newval, UIO_SYSSPACE, &len); 1663 if (error) 1664 return (error); 1665 newval = -SV_ABI_ERRNO(td->td_proc, newval); 1666 return (copyout(&newval, PTRIN(args->optval), len)); 1667 /* NOTREACHED */ 1668 default: 1669 break; 1670 } 1671 break; 1672 case IPPROTO_IP: 1673 name = linux_to_bsd_ip_sockopt(args->optname); 1674 break; 1675 case IPPROTO_IPV6: 1676 name = linux_to_bsd_ip6_sockopt(args->optname); 1677 break; 1678 case IPPROTO_TCP: 1679 name = linux_to_bsd_tcp_sockopt(args->optname); 1680 break; 1681 default: 1682 name = -1; 1683 break; 1684 } 1685 if (name == -1) 1686 return (EINVAL); 1687 1688 bsd_args.name = name; 1689 bsd_args.val = PTRIN(args->optval); 1690 bsd_args.avalsize = PTRIN(args->optlen); 1691 1692 if (name == IPV6_NEXTHOP) { 1693 error = sys_getsockopt(td, &bsd_args); 1694 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1695 } else 1696 error = sys_getsockopt(td, &bsd_args); 1697 1698 return (error); 1699 } 1700 1701 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1702 1703 /* Argument list sizes for linux_socketcall */ 1704 1705 #define LINUX_AL(x) ((x) * sizeof(l_ulong)) 1706 1707 static const unsigned char lxs_args[] = { 1708 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, 1709 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, 1710 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, 1711 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, 1712 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, 1713 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, 1714 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, 1715 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, 1716 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, 1717 LINUX_AL(4) /* accept4 */, LINUX_AL(5) /* recvmmsg */, 1718 LINUX_AL(4) /* sendmmsg */ 1719 }; 1720 1721 #define LINUX_AL_SIZE (nitems(lxs_args) - 1) 1722 1723 int 1724 linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1725 { 1726 l_ulong a[6]; 1727 void *arg; 1728 int error; 1729 1730 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) 1731 return (EINVAL); 1732 error = copyin(PTRIN(args->args), a, lxs_args[args->what]); 1733 if (error) 1734 return (error); 1735 1736 arg = a; 1737 switch (args->what) { 1738 case LINUX_SOCKET: 1739 return (linux_socket(td, arg)); 1740 case LINUX_BIND: 1741 return (linux_bind(td, arg)); 1742 case LINUX_CONNECT: 1743 return (linux_connect(td, arg)); 1744 case LINUX_LISTEN: 1745 return (linux_listen(td, arg)); 1746 case LINUX_ACCEPT: 1747 return (linux_accept(td, arg)); 1748 case LINUX_GETSOCKNAME: 1749 return (linux_getsockname(td, arg)); 1750 case LINUX_GETPEERNAME: 1751 return (linux_getpeername(td, arg)); 1752 case LINUX_SOCKETPAIR: 1753 return (linux_socketpair(td, arg)); 1754 case LINUX_SEND: 1755 return (linux_send(td, arg)); 1756 case LINUX_RECV: 1757 return (linux_recv(td, arg)); 1758 case LINUX_SENDTO: 1759 return (linux_sendto(td, arg)); 1760 case LINUX_RECVFROM: 1761 return (linux_recvfrom(td, arg)); 1762 case LINUX_SHUTDOWN: 1763 return (linux_shutdown(td, arg)); 1764 case LINUX_SETSOCKOPT: 1765 return (linux_setsockopt(td, arg)); 1766 case LINUX_GETSOCKOPT: 1767 return (linux_getsockopt(td, arg)); 1768 case LINUX_SENDMSG: 1769 return (linux_sendmsg(td, arg)); 1770 case LINUX_RECVMSG: 1771 return (linux_recvmsg(td, arg)); 1772 case LINUX_ACCEPT4: 1773 return (linux_accept4(td, arg)); 1774 case LINUX_RECVMMSG: 1775 return (linux_recvmmsg(td, arg)); 1776 case LINUX_SENDMMSG: 1777 return (linux_sendmmsg(td, arg)); 1778 } 1779 1780 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1781 return (ENOSYS); 1782 } 1783 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
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