linux_socket.c revision 224778
1/*- 2 * Copyright (c) 1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/compat/linux/linux_socket.c 224778 2011-08-11 12:30:23Z rwatson $"); 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/capability.h> 41#include <sys/fcntl.h> 42#include <sys/file.h> 43#include <sys/limits.h> 44#include <sys/lock.h> 45#include <sys/malloc.h> 46#include <sys/mutex.h> 47#include <sys/mbuf.h> 48#include <sys/socket.h> 49#include <sys/socketvar.h> 50#include <sys/syscallsubr.h> 51#include <sys/uio.h> 52#include <sys/syslog.h> 53#include <sys/un.h> 54 55#include <net/if.h> 56#include <netinet/in.h> 57#include <netinet/in_systm.h> 58#include <netinet/ip.h> 59#ifdef INET6 60#include <netinet/ip6.h> 61#include <netinet6/ip6_var.h> 62#include <netinet6/in6_var.h> 63#endif 64 65#ifdef COMPAT_LINUX32 66#include <machine/../linux32/linux.h> 67#include <machine/../linux32/linux32_proto.h> 68#else 69#include <machine/../linux/linux.h> 70#include <machine/../linux/linux_proto.h> 71#endif 72#include <compat/linux/linux_socket.h> 73#include <compat/linux/linux_util.h> 74 75static int do_sa_get(struct sockaddr **, const struct osockaddr *, int *, 76 struct malloc_type *); 77static int linux_to_bsd_domain(int); 78 79/* 80 * Reads a linux sockaddr and does any necessary translation. 81 * Linux sockaddrs don't have a length field, only a family. 82 */ 83static int 84linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int len) 85{ 86 int osalen = len; 87 88 return (do_sa_get(sap, osa, &osalen, M_SONAME)); 89} 90 91/* 92 * Copy the osockaddr structure pointed to by osa to kernel, adjust 93 * family and convert to sockaddr. 94 */ 95static int 96do_sa_get(struct sockaddr **sap, const struct osockaddr *osa, int *osalen, 97 struct malloc_type *mtype) 98{ 99 int error=0, bdom; 100 struct sockaddr *sa; 101 struct osockaddr *kosa; 102 int alloclen; 103#ifdef INET6 104 int oldv6size; 105 struct sockaddr_in6 *sin6; 106#endif 107 108 if (*osalen < 2 || *osalen > UCHAR_MAX || !osa) 109 return (EINVAL); 110 111 alloclen = *osalen; 112#ifdef INET6 113 oldv6size = 0; 114 /* 115 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it 116 * if it's a v4-mapped address, so reserve the proper space 117 * for it. 118 */ 119 if (alloclen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 120 alloclen = sizeof (struct sockaddr_in6); 121 oldv6size = 1; 122 } 123#endif 124 125 kosa = malloc(alloclen, mtype, M_WAITOK); 126 127 if ((error = copyin(osa, kosa, *osalen))) 128 goto out; 129 130 bdom = linux_to_bsd_domain(kosa->sa_family); 131 if (bdom == -1) { 132 error = EAFNOSUPPORT; 133 goto out; 134 } 135 136#ifdef INET6 137 /* 138 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 139 * which lacks the scope id compared with RFC2553 one. If we detect 140 * the situation, reject the address and write a message to system log. 141 * 142 * Still accept addresses for which the scope id is not used. 143 */ 144 if (oldv6size && bdom == AF_INET6) { 145 sin6 = (struct sockaddr_in6 *)kosa; 146 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 147 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 148 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 149 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && 150 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 151 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 152 sin6->sin6_scope_id = 0; 153 } else { 154 log(LOG_DEBUG, 155 "obsolete pre-RFC2553 sockaddr_in6 rejected\n"); 156 error = EINVAL; 157 goto out; 158 } 159 } else 160#endif 161 if (bdom == AF_INET) { 162 alloclen = sizeof(struct sockaddr_in); 163 if (*osalen < alloclen) { 164 error = EINVAL; 165 goto out; 166 } 167 } 168 169 sa = (struct sockaddr *) kosa; 170 sa->sa_family = bdom; 171 sa->sa_len = alloclen; 172 173 *sap = sa; 174 *osalen = alloclen; 175 return (0); 176 177out: 178 free(kosa, mtype); 179 return (error); 180} 181 182static int 183linux_to_bsd_domain(int domain) 184{ 185 186 switch (domain) { 187 case LINUX_AF_UNSPEC: 188 return (AF_UNSPEC); 189 case LINUX_AF_UNIX: 190 return (AF_LOCAL); 191 case LINUX_AF_INET: 192 return (AF_INET); 193 case LINUX_AF_INET6: 194 return (AF_INET6); 195 case LINUX_AF_AX25: 196 return (AF_CCITT); 197 case LINUX_AF_IPX: 198 return (AF_IPX); 199 case LINUX_AF_APPLETALK: 200 return (AF_APPLETALK); 201 } 202 return (-1); 203} 204 205static int 206bsd_to_linux_domain(int domain) 207{ 208 209 switch (domain) { 210 case AF_UNSPEC: 211 return (LINUX_AF_UNSPEC); 212 case AF_LOCAL: 213 return (LINUX_AF_UNIX); 214 case AF_INET: 215 return (LINUX_AF_INET); 216 case AF_INET6: 217 return (LINUX_AF_INET6); 218 case AF_CCITT: 219 return (LINUX_AF_AX25); 220 case AF_IPX: 221 return (LINUX_AF_IPX); 222 case AF_APPLETALK: 223 return (LINUX_AF_APPLETALK); 224 } 225 return (-1); 226} 227 228static int 229linux_to_bsd_sockopt_level(int level) 230{ 231 232 switch (level) { 233 case LINUX_SOL_SOCKET: 234 return (SOL_SOCKET); 235 } 236 return (level); 237} 238 239static int 240bsd_to_linux_sockopt_level(int level) 241{ 242 243 switch (level) { 244 case SOL_SOCKET: 245 return (LINUX_SOL_SOCKET); 246 } 247 return (level); 248} 249 250static int 251linux_to_bsd_ip_sockopt(int opt) 252{ 253 254 switch (opt) { 255 case LINUX_IP_TOS: 256 return (IP_TOS); 257 case LINUX_IP_TTL: 258 return (IP_TTL); 259 case LINUX_IP_OPTIONS: 260 return (IP_OPTIONS); 261 case LINUX_IP_MULTICAST_IF: 262 return (IP_MULTICAST_IF); 263 case LINUX_IP_MULTICAST_TTL: 264 return (IP_MULTICAST_TTL); 265 case LINUX_IP_MULTICAST_LOOP: 266 return (IP_MULTICAST_LOOP); 267 case LINUX_IP_ADD_MEMBERSHIP: 268 return (IP_ADD_MEMBERSHIP); 269 case LINUX_IP_DROP_MEMBERSHIP: 270 return (IP_DROP_MEMBERSHIP); 271 case LINUX_IP_HDRINCL: 272 return (IP_HDRINCL); 273 } 274 return (-1); 275} 276 277static int 278linux_to_bsd_so_sockopt(int opt) 279{ 280 281 switch (opt) { 282 case LINUX_SO_DEBUG: 283 return (SO_DEBUG); 284 case LINUX_SO_REUSEADDR: 285 return (SO_REUSEADDR); 286 case LINUX_SO_TYPE: 287 return (SO_TYPE); 288 case LINUX_SO_ERROR: 289 return (SO_ERROR); 290 case LINUX_SO_DONTROUTE: 291 return (SO_DONTROUTE); 292 case LINUX_SO_BROADCAST: 293 return (SO_BROADCAST); 294 case LINUX_SO_SNDBUF: 295 return (SO_SNDBUF); 296 case LINUX_SO_RCVBUF: 297 return (SO_RCVBUF); 298 case LINUX_SO_KEEPALIVE: 299 return (SO_KEEPALIVE); 300 case LINUX_SO_OOBINLINE: 301 return (SO_OOBINLINE); 302 case LINUX_SO_LINGER: 303 return (SO_LINGER); 304 case LINUX_SO_PEERCRED: 305 return (LOCAL_PEERCRED); 306 case LINUX_SO_RCVLOWAT: 307 return (SO_RCVLOWAT); 308 case LINUX_SO_SNDLOWAT: 309 return (SO_SNDLOWAT); 310 case LINUX_SO_RCVTIMEO: 311 return (SO_RCVTIMEO); 312 case LINUX_SO_SNDTIMEO: 313 return (SO_SNDTIMEO); 314 case LINUX_SO_TIMESTAMP: 315 return (SO_TIMESTAMP); 316 case LINUX_SO_ACCEPTCONN: 317 return (SO_ACCEPTCONN); 318 } 319 return (-1); 320} 321 322static int 323linux_to_bsd_msg_flags(int flags) 324{ 325 int ret_flags = 0; 326 327 if (flags & LINUX_MSG_OOB) 328 ret_flags |= MSG_OOB; 329 if (flags & LINUX_MSG_PEEK) 330 ret_flags |= MSG_PEEK; 331 if (flags & LINUX_MSG_DONTROUTE) 332 ret_flags |= MSG_DONTROUTE; 333 if (flags & LINUX_MSG_CTRUNC) 334 ret_flags |= MSG_CTRUNC; 335 if (flags & LINUX_MSG_TRUNC) 336 ret_flags |= MSG_TRUNC; 337 if (flags & LINUX_MSG_DONTWAIT) 338 ret_flags |= MSG_DONTWAIT; 339 if (flags & LINUX_MSG_EOR) 340 ret_flags |= MSG_EOR; 341 if (flags & LINUX_MSG_WAITALL) 342 ret_flags |= MSG_WAITALL; 343 if (flags & LINUX_MSG_NOSIGNAL) 344 ret_flags |= MSG_NOSIGNAL; 345#if 0 /* not handled */ 346 if (flags & LINUX_MSG_PROXY) 347 ; 348 if (flags & LINUX_MSG_FIN) 349 ; 350 if (flags & LINUX_MSG_SYN) 351 ; 352 if (flags & LINUX_MSG_CONFIRM) 353 ; 354 if (flags & LINUX_MSG_RST) 355 ; 356 if (flags & LINUX_MSG_ERRQUEUE) 357 ; 358#endif 359 return ret_flags; 360} 361 362/* 363* If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the 364* native syscall will fault. Thus, we don't really need to check the 365* return values for these functions. 366*/ 367 368static int 369bsd_to_linux_sockaddr(struct sockaddr *arg) 370{ 371 struct sockaddr sa; 372 size_t sa_len = sizeof(struct sockaddr); 373 int error; 374 375 if ((error = copyin(arg, &sa, sa_len))) 376 return (error); 377 378 *(u_short *)&sa = sa.sa_family; 379 380 error = copyout(&sa, arg, sa_len); 381 382 return (error); 383} 384 385static int 386linux_to_bsd_sockaddr(struct sockaddr *arg, int len) 387{ 388 struct sockaddr sa; 389 size_t sa_len = sizeof(struct sockaddr); 390 int error; 391 392 if ((error = copyin(arg, &sa, sa_len))) 393 return (error); 394 395 sa.sa_family = *(sa_family_t *)&sa; 396 sa.sa_len = len; 397 398 error = copyout(&sa, arg, sa_len); 399 400 return (error); 401} 402 403 404static int 405linux_sa_put(struct osockaddr *osa) 406{ 407 struct osockaddr sa; 408 int error, bdom; 409 410 /* 411 * Only read/write the osockaddr family part, the rest is 412 * not changed. 413 */ 414 error = copyin(osa, &sa, sizeof(sa.sa_family)); 415 if (error) 416 return (error); 417 418 bdom = bsd_to_linux_domain(sa.sa_family); 419 if (bdom == -1) 420 return (EINVAL); 421 422 sa.sa_family = bdom; 423 error = copyout(&sa, osa, sizeof(sa.sa_family)); 424 if (error) 425 return (error); 426 427 return (0); 428} 429 430static int 431linux_to_bsd_cmsg_type(int cmsg_type) 432{ 433 434 switch (cmsg_type) { 435 case LINUX_SCM_RIGHTS: 436 return (SCM_RIGHTS); 437 case LINUX_SCM_CREDENTIALS: 438 return (SCM_CREDS); 439 } 440 return (-1); 441} 442 443static int 444bsd_to_linux_cmsg_type(int cmsg_type) 445{ 446 447 switch (cmsg_type) { 448 case SCM_RIGHTS: 449 return (LINUX_SCM_RIGHTS); 450 case SCM_CREDS: 451 return (LINUX_SCM_CREDENTIALS); 452 } 453 return (-1); 454} 455 456static int 457linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 458{ 459 if (lhdr->msg_controllen > INT_MAX) 460 return (ENOBUFS); 461 462 bhdr->msg_name = PTRIN(lhdr->msg_name); 463 bhdr->msg_namelen = lhdr->msg_namelen; 464 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 465 bhdr->msg_iovlen = lhdr->msg_iovlen; 466 bhdr->msg_control = PTRIN(lhdr->msg_control); 467 468 /* 469 * msg_controllen is skipped since BSD and LINUX control messages 470 * are potentially different sizes (e.g. the cred structure used 471 * by SCM_CREDS is different between the two operating system). 472 * 473 * The caller can set it (if necessary) after converting all the 474 * control messages. 475 */ 476 477 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 478 return (0); 479} 480 481static int 482bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 483{ 484 lhdr->msg_name = PTROUT(bhdr->msg_name); 485 lhdr->msg_namelen = bhdr->msg_namelen; 486 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 487 lhdr->msg_iovlen = bhdr->msg_iovlen; 488 lhdr->msg_control = PTROUT(bhdr->msg_control); 489 490 /* 491 * msg_controllen is skipped since BSD and LINUX control messages 492 * are potentially different sizes (e.g. the cred structure used 493 * by SCM_CREDS is different between the two operating system). 494 * 495 * The caller can set it (if necessary) after converting all the 496 * control messages. 497 */ 498 499 /* msg_flags skipped */ 500 return (0); 501} 502 503static int 504linux_set_socket_flags(struct thread *td, int s, int flags) 505{ 506 int error; 507 508 if (flags & LINUX_SOCK_NONBLOCK) { 509 error = kern_fcntl(td, s, F_SETFL, O_NONBLOCK); 510 if (error) 511 return (error); 512 } 513 if (flags & LINUX_SOCK_CLOEXEC) { 514 error = kern_fcntl(td, s, F_SETFD, FD_CLOEXEC); 515 if (error) 516 return (error); 517 } 518 return (0); 519} 520 521static int 522linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 523 struct mbuf *control, enum uio_seg segflg) 524{ 525 struct sockaddr *to; 526 int error; 527 528 if (mp->msg_name != NULL) { 529 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); 530 if (error) 531 return (error); 532 mp->msg_name = to; 533 } else 534 to = NULL; 535 536 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 537 segflg); 538 539 if (to) 540 free(to, M_SONAME); 541 return (error); 542} 543 544/* Return 0 if IP_HDRINCL is set for the given socket. */ 545static int 546linux_check_hdrincl(struct thread *td, int s) 547{ 548 int error, optval, size_val; 549 550 size_val = sizeof(optval); 551 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 552 &optval, UIO_SYSSPACE, &size_val); 553 if (error) 554 return (error); 555 556 return (optval == 0); 557} 558 559struct linux_sendto_args { 560 int s; 561 l_uintptr_t msg; 562 int len; 563 int flags; 564 l_uintptr_t to; 565 int tolen; 566}; 567 568/* 569 * Updated sendto() when IP_HDRINCL is set: 570 * tweak endian-dependent fields in the IP packet. 571 */ 572static int 573linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 574{ 575/* 576 * linux_ip_copysize defines how many bytes we should copy 577 * from the beginning of the IP packet before we customize it for BSD. 578 * It should include all the fields we modify (ip_len and ip_off). 579 */ 580#define linux_ip_copysize 8 581 582 struct ip *packet; 583 struct msghdr msg; 584 struct iovec aiov[1]; 585 int error; 586 587 /* Check that the packet isn't too big or too small. */ 588 if (linux_args->len < linux_ip_copysize || 589 linux_args->len > IP_MAXPACKET) 590 return (EINVAL); 591 592 packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK); 593 594 /* Make kernel copy of the packet to be sent */ 595 if ((error = copyin(PTRIN(linux_args->msg), packet, 596 linux_args->len))) 597 goto goout; 598 599 /* Convert fields from Linux to BSD raw IP socket format */ 600 packet->ip_len = linux_args->len; 601 packet->ip_off = ntohs(packet->ip_off); 602 603 /* Prepare the msghdr and iovec structures describing the new packet */ 604 msg.msg_name = PTRIN(linux_args->to); 605 msg.msg_namelen = linux_args->tolen; 606 msg.msg_iov = aiov; 607 msg.msg_iovlen = 1; 608 msg.msg_control = NULL; 609 msg.msg_flags = 0; 610 aiov[0].iov_base = (char *)packet; 611 aiov[0].iov_len = linux_args->len; 612 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 613 NULL, UIO_SYSSPACE); 614goout: 615 free(packet, M_TEMP); 616 return (error); 617} 618 619struct linux_socket_args { 620 int domain; 621 int type; 622 int protocol; 623}; 624 625static int 626linux_socket(struct thread *td, struct linux_socket_args *args) 627{ 628 struct socket_args /* { 629 int domain; 630 int type; 631 int protocol; 632 } */ bsd_args; 633 int retval_socket, socket_flags; 634 635 bsd_args.protocol = args->protocol; 636 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK; 637 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 638 return (EINVAL); 639 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 640 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 641 return (EINVAL); 642 bsd_args.domain = linux_to_bsd_domain(args->domain); 643 if (bsd_args.domain == -1) 644 return (EAFNOSUPPORT); 645 646 retval_socket = socket(td, &bsd_args); 647 if (retval_socket) 648 return (retval_socket); 649 650 retval_socket = linux_set_socket_flags(td, td->td_retval[0], 651 socket_flags); 652 if (retval_socket) { 653 (void)kern_close(td, td->td_retval[0]); 654 goto out; 655 } 656 657 if (bsd_args.type == SOCK_RAW 658 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) 659 && bsd_args.domain == PF_INET) { 660 /* It's a raw IP socket: set the IP_HDRINCL option. */ 661 int hdrincl; 662 663 hdrincl = 1; 664 /* We ignore any error returned by kern_setsockopt() */ 665 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 666 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 667 } 668#ifdef INET6 669 /* 670 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 671 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 672 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 673 * sysctl value. 674 */ 675 if (bsd_args.domain == PF_INET6) { 676 int v6only; 677 678 v6only = 0; 679 /* We ignore any error returned by setsockopt() */ 680 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 681 &v6only, UIO_SYSSPACE, sizeof(v6only)); 682 } 683#endif 684 685out: 686 return (retval_socket); 687} 688 689struct linux_bind_args { 690 int s; 691 l_uintptr_t name; 692 int namelen; 693}; 694 695static int 696linux_bind(struct thread *td, struct linux_bind_args *args) 697{ 698 struct sockaddr *sa; 699 int error; 700 701 error = linux_getsockaddr(&sa, PTRIN(args->name), 702 args->namelen); 703 if (error) 704 return (error); 705 706 error = kern_bind(td, args->s, sa); 707 free(sa, M_SONAME); 708 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 709 return (EINVAL); 710 return (error); 711} 712 713struct linux_connect_args { 714 int s; 715 l_uintptr_t name; 716 int namelen; 717}; 718int linux_connect(struct thread *, struct linux_connect_args *); 719 720int 721linux_connect(struct thread *td, struct linux_connect_args *args) 722{ 723 struct socket *so; 724 struct sockaddr *sa; 725 u_int fflag; 726 int error; 727 728 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), 729 args->namelen); 730 if (error) 731 return (error); 732 733 error = kern_connect(td, args->s, sa); 734 free(sa, M_SONAME); 735 if (error != EISCONN) 736 return (error); 737 738 /* 739 * Linux doesn't return EISCONN the first time it occurs, 740 * when on a non-blocking socket. Instead it returns the 741 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 742 * 743 * XXXRW: Instead of using fgetsock(), check that it is a 744 * socket and use the file descriptor reference instead of 745 * creating a new one. 746 */ 747 error = fgetsock(td, args->s, CAP_CONNECT, &so, &fflag); 748 if (error == 0) { 749 error = EISCONN; 750 if (fflag & FNONBLOCK) { 751 SOCK_LOCK(so); 752 if (so->so_emuldata == 0) 753 error = so->so_error; 754 so->so_emuldata = (void *)1; 755 SOCK_UNLOCK(so); 756 } 757 fputsock(so); 758 } 759 return (error); 760} 761 762struct linux_listen_args { 763 int s; 764 int backlog; 765}; 766 767static int 768linux_listen(struct thread *td, struct linux_listen_args *args) 769{ 770 struct listen_args /* { 771 int s; 772 int backlog; 773 } */ bsd_args; 774 775 bsd_args.s = args->s; 776 bsd_args.backlog = args->backlog; 777 return (listen(td, &bsd_args)); 778} 779 780static int 781linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 782 l_uintptr_t namelen, int flags) 783{ 784 struct accept_args /* { 785 int s; 786 struct sockaddr * __restrict name; 787 socklen_t * __restrict anamelen; 788 } */ bsd_args; 789 int error; 790 791 if (flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 792 return (EINVAL); 793 794 bsd_args.s = s; 795 /* XXX: */ 796 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); 797 bsd_args.anamelen = PTRIN(namelen);/* XXX */ 798 error = accept(td, &bsd_args); 799 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); 800 if (error) { 801 if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) 802 return (EINVAL); 803 return (error); 804 } 805 806 /* 807 * linux appears not to copy flags from the parent socket to the 808 * accepted one, so we must clear the flags in the new descriptor 809 * and apply the requested flags. 810 */ 811 error = kern_fcntl(td, td->td_retval[0], F_SETFL, 0); 812 if (error) 813 goto out; 814 error = linux_set_socket_flags(td, td->td_retval[0], flags); 815 if (error) 816 goto out; 817 if (addr) 818 error = linux_sa_put(PTRIN(addr)); 819 820out: 821 if (error) { 822 (void)kern_close(td, td->td_retval[0]); 823 td->td_retval[0] = 0; 824 } 825 return (error); 826} 827 828struct linux_accept_args { 829 int s; 830 l_uintptr_t addr; 831 l_uintptr_t namelen; 832}; 833 834static int 835linux_accept(struct thread *td, struct linux_accept_args *args) 836{ 837 838 return (linux_accept_common(td, args->s, args->addr, 839 args->namelen, 0)); 840} 841 842struct linux_accept4_args { 843 int s; 844 l_uintptr_t addr; 845 l_uintptr_t namelen; 846 int flags; 847}; 848 849static int 850linux_accept4(struct thread *td, struct linux_accept4_args *args) 851{ 852 853 return (linux_accept_common(td, args->s, args->addr, 854 args->namelen, args->flags)); 855} 856 857struct linux_getsockname_args { 858 int s; 859 l_uintptr_t addr; 860 l_uintptr_t namelen; 861}; 862 863static int 864linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 865{ 866 struct getsockname_args /* { 867 int fdes; 868 struct sockaddr * __restrict asa; 869 socklen_t * __restrict alen; 870 } */ bsd_args; 871 int error; 872 873 bsd_args.fdes = args->s; 874 /* XXX: */ 875 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); 876 bsd_args.alen = PTRIN(args->namelen); /* XXX */ 877 error = getsockname(td, &bsd_args); 878 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 879 if (error) 880 return (error); 881 error = linux_sa_put(PTRIN(args->addr)); 882 if (error) 883 return (error); 884 return (0); 885} 886 887struct linux_getpeername_args { 888 int s; 889 l_uintptr_t addr; 890 l_uintptr_t namelen; 891}; 892 893static int 894linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 895{ 896 struct getpeername_args /* { 897 int fdes; 898 caddr_t asa; 899 int *alen; 900 } */ bsd_args; 901 int error; 902 903 bsd_args.fdes = args->s; 904 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); 905 bsd_args.alen = (int *)PTRIN(args->namelen); 906 error = getpeername(td, &bsd_args); 907 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 908 if (error) 909 return (error); 910 error = linux_sa_put(PTRIN(args->addr)); 911 if (error) 912 return (error); 913 return (0); 914} 915 916struct linux_socketpair_args { 917 int domain; 918 int type; 919 int protocol; 920 l_uintptr_t rsv; 921}; 922 923static int 924linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 925{ 926 struct socketpair_args /* { 927 int domain; 928 int type; 929 int protocol; 930 int *rsv; 931 } */ bsd_args; 932 int error, socket_flags; 933 int sv[2]; 934 935 bsd_args.domain = linux_to_bsd_domain(args->domain); 936 if (bsd_args.domain != PF_LOCAL) 937 return (EAFNOSUPPORT); 938 939 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK; 940 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 941 return (EINVAL); 942 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 943 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 944 return (EINVAL); 945 946 if (args->protocol != 0 && args->protocol != PF_UNIX) 947 948 /* 949 * Use of PF_UNIX as protocol argument is not right, 950 * but Linux does it. 951 * Do not map PF_UNIX as its Linux value is identical 952 * to FreeBSD one. 953 */ 954 return (EPROTONOSUPPORT); 955 else 956 bsd_args.protocol = 0; 957 bsd_args.rsv = (int *)PTRIN(args->rsv); 958 error = kern_socketpair(td, bsd_args.domain, bsd_args.type, 959 bsd_args.protocol, sv); 960 if (error) 961 return (error); 962 error = linux_set_socket_flags(td, sv[0], socket_flags); 963 if (error) 964 goto out; 965 error = linux_set_socket_flags(td, sv[1], socket_flags); 966 if (error) 967 goto out; 968 969 error = copyout(sv, bsd_args.rsv, 2 * sizeof(int)); 970 971out: 972 if (error) { 973 (void)kern_close(td, sv[0]); 974 (void)kern_close(td, sv[1]); 975 } 976 return (error); 977} 978 979struct linux_send_args { 980 int s; 981 l_uintptr_t msg; 982 int len; 983 int flags; 984}; 985 986static int 987linux_send(struct thread *td, struct linux_send_args *args) 988{ 989 struct sendto_args /* { 990 int s; 991 caddr_t buf; 992 int len; 993 int flags; 994 caddr_t to; 995 int tolen; 996 } */ bsd_args; 997 998 bsd_args.s = args->s; 999 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1000 bsd_args.len = args->len; 1001 bsd_args.flags = args->flags; 1002 bsd_args.to = NULL; 1003 bsd_args.tolen = 0; 1004 return sendto(td, &bsd_args); 1005} 1006 1007struct linux_recv_args { 1008 int s; 1009 l_uintptr_t msg; 1010 int len; 1011 int flags; 1012}; 1013 1014static int 1015linux_recv(struct thread *td, struct linux_recv_args *args) 1016{ 1017 struct recvfrom_args /* { 1018 int s; 1019 caddr_t buf; 1020 int len; 1021 int flags; 1022 struct sockaddr *from; 1023 socklen_t fromlenaddr; 1024 } */ bsd_args; 1025 1026 bsd_args.s = args->s; 1027 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1028 bsd_args.len = args->len; 1029 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1030 bsd_args.from = NULL; 1031 bsd_args.fromlenaddr = 0; 1032 return (recvfrom(td, &bsd_args)); 1033} 1034 1035static int 1036linux_sendto(struct thread *td, struct linux_sendto_args *args) 1037{ 1038 struct msghdr msg; 1039 struct iovec aiov; 1040 int error; 1041 1042 if (linux_check_hdrincl(td, args->s) == 0) 1043 /* IP_HDRINCL set, tweak the packet before sending */ 1044 return (linux_sendto_hdrincl(td, args)); 1045 1046 msg.msg_name = PTRIN(args->to); 1047 msg.msg_namelen = args->tolen; 1048 msg.msg_iov = &aiov; 1049 msg.msg_iovlen = 1; 1050 msg.msg_control = NULL; 1051 msg.msg_flags = 0; 1052 aiov.iov_base = PTRIN(args->msg); 1053 aiov.iov_len = args->len; 1054 error = linux_sendit(td, args->s, &msg, args->flags, NULL, 1055 UIO_USERSPACE); 1056 return (error); 1057} 1058 1059struct linux_recvfrom_args { 1060 int s; 1061 l_uintptr_t buf; 1062 int len; 1063 int flags; 1064 l_uintptr_t from; 1065 l_uintptr_t fromlen; 1066}; 1067 1068static int 1069linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1070{ 1071 struct recvfrom_args /* { 1072 int s; 1073 caddr_t buf; 1074 size_t len; 1075 int flags; 1076 struct sockaddr * __restrict from; 1077 socklen_t * __restrict fromlenaddr; 1078 } */ bsd_args; 1079 size_t len; 1080 int error; 1081 1082 if ((error = copyin(PTRIN(args->fromlen), &len, sizeof(size_t)))) 1083 return (error); 1084 1085 bsd_args.s = args->s; 1086 bsd_args.buf = PTRIN(args->buf); 1087 bsd_args.len = args->len; 1088 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1089 /* XXX: */ 1090 bsd_args.from = (struct sockaddr * __restrict)PTRIN(args->from); 1091 bsd_args.fromlenaddr = PTRIN(args->fromlen);/* XXX */ 1092 1093 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len); 1094 error = recvfrom(td, &bsd_args); 1095 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from); 1096 1097 if (error) 1098 return (error); 1099 if (args->from) { 1100 error = linux_sa_put((struct osockaddr *) 1101 PTRIN(args->from)); 1102 if (error) 1103 return (error); 1104 } 1105 return (0); 1106} 1107 1108struct linux_sendmsg_args { 1109 int s; 1110 l_uintptr_t msg; 1111 int flags; 1112}; 1113 1114static int 1115linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1116{ 1117 struct cmsghdr *cmsg; 1118 struct cmsgcred cmcred; 1119 struct mbuf *control; 1120 struct msghdr msg; 1121 struct l_cmsghdr linux_cmsg; 1122 struct l_cmsghdr *ptr_cmsg; 1123 struct l_msghdr linux_msg; 1124 struct iovec *iov; 1125 socklen_t datalen; 1126 struct sockaddr *sa; 1127 sa_family_t sa_family; 1128 void *data; 1129 int error; 1130 1131 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg)); 1132 if (error) 1133 return (error); 1134 1135 /* 1136 * Some Linux applications (ping) define a non-NULL control data 1137 * pointer, but a msg_controllen of 0, which is not allowed in the 1138 * FreeBSD system call interface. NULL the msg_control pointer in 1139 * order to handle this case. This should be checked, but allows the 1140 * Linux ping to work. 1141 */ 1142 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) 1143 linux_msg.msg_control = PTROUT(NULL); 1144 1145 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1146 if (error) 1147 return (error); 1148 1149#ifdef COMPAT_LINUX32 1150 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1151 &iov, EMSGSIZE); 1152#else 1153 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1154#endif 1155 if (error) 1156 return (error); 1157 1158 control = NULL; 1159 cmsg = NULL; 1160 1161 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { 1162 error = kern_getsockname(td, args->s, &sa, &datalen); 1163 if (error) 1164 goto bad; 1165 sa_family = sa->sa_family; 1166 free(sa, M_SONAME); 1167 1168 error = ENOBUFS; 1169 cmsg = malloc(CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO); 1170 control = m_get(M_WAIT, MT_CONTROL); 1171 if (control == NULL) 1172 goto bad; 1173 1174 do { 1175 error = copyin(ptr_cmsg, &linux_cmsg, 1176 sizeof(struct l_cmsghdr)); 1177 if (error) 1178 goto bad; 1179 1180 error = EINVAL; 1181 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) 1182 goto bad; 1183 1184 /* 1185 * Now we support only SCM_RIGHTS and SCM_CRED, 1186 * so return EINVAL in any other cmsg_type 1187 */ 1188 cmsg->cmsg_type = 1189 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1190 cmsg->cmsg_level = 1191 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1192 if (cmsg->cmsg_type == -1 1193 || cmsg->cmsg_level != SOL_SOCKET) 1194 goto bad; 1195 1196 /* 1197 * Some applications (e.g. pulseaudio) attempt to 1198 * send ancillary data even if the underlying protocol 1199 * doesn't support it which is not allowed in the 1200 * FreeBSD system call interface. 1201 */ 1202 if (sa_family != AF_UNIX) 1203 continue; 1204 1205 data = LINUX_CMSG_DATA(ptr_cmsg); 1206 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1207 1208 switch (cmsg->cmsg_type) 1209 { 1210 case SCM_RIGHTS: 1211 break; 1212 1213 case SCM_CREDS: 1214 data = &cmcred; 1215 datalen = sizeof(cmcred); 1216 1217 /* 1218 * The lower levels will fill in the structure 1219 */ 1220 bzero(data, datalen); 1221 break; 1222 } 1223 1224 cmsg->cmsg_len = CMSG_LEN(datalen); 1225 1226 error = ENOBUFS; 1227 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t) cmsg)) 1228 goto bad; 1229 if (!m_append(control, datalen, (c_caddr_t) data)) 1230 goto bad; 1231 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); 1232 1233 if (m_length(control, NULL) == 0) { 1234 m_freem(control); 1235 control = NULL; 1236 } 1237 } 1238 1239 msg.msg_iov = iov; 1240 msg.msg_flags = 0; 1241 error = linux_sendit(td, args->s, &msg, args->flags, control, 1242 UIO_USERSPACE); 1243 1244bad: 1245 free(iov, M_IOV); 1246 if (cmsg) 1247 free(cmsg, M_TEMP); 1248 return (error); 1249} 1250 1251struct linux_recvmsg_args { 1252 int s; 1253 l_uintptr_t msg; 1254 int flags; 1255}; 1256 1257static int 1258linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1259{ 1260 struct cmsghdr *cm; 1261 struct cmsgcred *cmcred; 1262 struct msghdr msg; 1263 struct l_cmsghdr *linux_cmsg = NULL; 1264 struct l_ucred linux_ucred; 1265 socklen_t datalen, outlen; 1266 struct l_msghdr linux_msg; 1267 struct iovec *iov, *uiov; 1268 struct mbuf *control = NULL; 1269 struct mbuf **controlp; 1270 caddr_t outbuf; 1271 void *data; 1272 int error, i, fd, fds, *fdp; 1273 1274 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg)); 1275 if (error) 1276 return (error); 1277 1278 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1279 if (error) 1280 return (error); 1281 1282#ifdef COMPAT_LINUX32 1283 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1284 &iov, EMSGSIZE); 1285#else 1286 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1287#endif 1288 if (error) 1289 return (error); 1290 1291 if (msg.msg_name) { 1292 error = linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name, 1293 msg.msg_namelen); 1294 if (error) 1295 goto bad; 1296 } 1297 1298 uiov = msg.msg_iov; 1299 msg.msg_iov = iov; 1300 controlp = (msg.msg_control != NULL) ? &control : NULL; 1301 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, controlp); 1302 msg.msg_iov = uiov; 1303 if (error) 1304 goto bad; 1305 1306 error = bsd_to_linux_msghdr(&msg, &linux_msg); 1307 if (error) 1308 goto bad; 1309 1310 if (linux_msg.msg_name) { 1311 error = bsd_to_linux_sockaddr((struct sockaddr *) 1312 PTRIN(linux_msg.msg_name)); 1313 if (error) 1314 goto bad; 1315 } 1316 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1317 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1318 if (error) 1319 goto bad; 1320 } 1321 1322 outbuf = PTRIN(linux_msg.msg_control); 1323 outlen = 0; 1324 1325 if (control) { 1326 linux_cmsg = malloc(L_CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO); 1327 1328 msg.msg_control = mtod(control, struct cmsghdr *); 1329 msg.msg_controllen = control->m_len; 1330 1331 cm = CMSG_FIRSTHDR(&msg); 1332 1333 while (cm != NULL) { 1334 linux_cmsg->cmsg_type = 1335 bsd_to_linux_cmsg_type(cm->cmsg_type); 1336 linux_cmsg->cmsg_level = 1337 bsd_to_linux_sockopt_level(cm->cmsg_level); 1338 if (linux_cmsg->cmsg_type == -1 1339 || cm->cmsg_level != SOL_SOCKET) 1340 { 1341 error = EINVAL; 1342 goto bad; 1343 } 1344 1345 data = CMSG_DATA(cm); 1346 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1347 1348 switch (cm->cmsg_type) 1349 { 1350 case SCM_RIGHTS: 1351 if (args->flags & LINUX_MSG_CMSG_CLOEXEC) { 1352 fds = datalen / sizeof(int); 1353 fdp = data; 1354 for (i = 0; i < fds; i++) { 1355 fd = *fdp++; 1356 (void)kern_fcntl(td, fd, 1357 F_SETFD, FD_CLOEXEC); 1358 } 1359 } 1360 break; 1361 1362 case SCM_CREDS: 1363 /* 1364 * Currently LOCAL_CREDS is never in 1365 * effect for Linux so no need to worry 1366 * about sockcred 1367 */ 1368 if (datalen != sizeof (*cmcred)) { 1369 error = EMSGSIZE; 1370 goto bad; 1371 } 1372 cmcred = (struct cmsgcred *)data; 1373 bzero(&linux_ucred, sizeof(linux_ucred)); 1374 linux_ucred.pid = cmcred->cmcred_pid; 1375 linux_ucred.uid = cmcred->cmcred_uid; 1376 linux_ucred.gid = cmcred->cmcred_gid; 1377 data = &linux_ucred; 1378 datalen = sizeof(linux_ucred); 1379 break; 1380 } 1381 1382 if (outlen + LINUX_CMSG_LEN(datalen) > 1383 linux_msg.msg_controllen) { 1384 if (outlen == 0) { 1385 error = EMSGSIZE; 1386 goto bad; 1387 } else { 1388 linux_msg.msg_flags |= 1389 LINUX_MSG_CTRUNC; 1390 goto out; 1391 } 1392 } 1393 1394 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1395 1396 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1397 if (error) 1398 goto bad; 1399 outbuf += L_CMSG_HDRSZ; 1400 1401 error = copyout(data, outbuf, datalen); 1402 if (error) 1403 goto bad; 1404 1405 outbuf += LINUX_CMSG_ALIGN(datalen); 1406 outlen += LINUX_CMSG_LEN(datalen); 1407 1408 cm = CMSG_NXTHDR(&msg, cm); 1409 } 1410 } 1411 1412out: 1413 linux_msg.msg_controllen = outlen; 1414 error = copyout(&linux_msg, PTRIN(args->msg), sizeof(linux_msg)); 1415 1416bad: 1417 free(iov, M_IOV); 1418 if (control != NULL) 1419 m_freem(control); 1420 if (linux_cmsg != NULL) 1421 free(linux_cmsg, M_TEMP); 1422 1423 return (error); 1424} 1425 1426struct linux_shutdown_args { 1427 int s; 1428 int how; 1429}; 1430 1431static int 1432linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1433{ 1434 struct shutdown_args /* { 1435 int s; 1436 int how; 1437 } */ bsd_args; 1438 1439 bsd_args.s = args->s; 1440 bsd_args.how = args->how; 1441 return (shutdown(td, &bsd_args)); 1442} 1443 1444struct linux_setsockopt_args { 1445 int s; 1446 int level; 1447 int optname; 1448 l_uintptr_t optval; 1449 int optlen; 1450}; 1451 1452static int 1453linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1454{ 1455 struct setsockopt_args /* { 1456 int s; 1457 int level; 1458 int name; 1459 caddr_t val; 1460 int valsize; 1461 } */ bsd_args; 1462 l_timeval linux_tv; 1463 struct timeval tv; 1464 int error, name; 1465 1466 bsd_args.s = args->s; 1467 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1468 switch (bsd_args.level) { 1469 case SOL_SOCKET: 1470 name = linux_to_bsd_so_sockopt(args->optname); 1471 switch (name) { 1472 case SO_RCVTIMEO: 1473 /* FALLTHROUGH */ 1474 case SO_SNDTIMEO: 1475 error = copyin(PTRIN(args->optval), &linux_tv, 1476 sizeof(linux_tv)); 1477 if (error) 1478 return (error); 1479 tv.tv_sec = linux_tv.tv_sec; 1480 tv.tv_usec = linux_tv.tv_usec; 1481 return (kern_setsockopt(td, args->s, bsd_args.level, 1482 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1483 /* NOTREACHED */ 1484 break; 1485 default: 1486 break; 1487 } 1488 break; 1489 case IPPROTO_IP: 1490 name = linux_to_bsd_ip_sockopt(args->optname); 1491 break; 1492 case IPPROTO_TCP: 1493 /* Linux TCP option values match BSD's */ 1494 name = args->optname; 1495 break; 1496 default: 1497 name = -1; 1498 break; 1499 } 1500 if (name == -1) 1501 return (ENOPROTOOPT); 1502 1503 bsd_args.name = name; 1504 bsd_args.val = PTRIN(args->optval); 1505 bsd_args.valsize = args->optlen; 1506 1507 if (name == IPV6_NEXTHOP) { 1508 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1509 bsd_args.valsize); 1510 error = setsockopt(td, &bsd_args); 1511 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1512 } else 1513 error = setsockopt(td, &bsd_args); 1514 1515 return (error); 1516} 1517 1518struct linux_getsockopt_args { 1519 int s; 1520 int level; 1521 int optname; 1522 l_uintptr_t optval; 1523 l_uintptr_t optlen; 1524}; 1525 1526static int 1527linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1528{ 1529 struct getsockopt_args /* { 1530 int s; 1531 int level; 1532 int name; 1533 caddr_t val; 1534 int *avalsize; 1535 } */ bsd_args; 1536 l_timeval linux_tv; 1537 struct timeval tv; 1538 socklen_t tv_len, xulen; 1539 struct xucred xu; 1540 struct l_ucred lxu; 1541 int error, name; 1542 1543 bsd_args.s = args->s; 1544 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1545 switch (bsd_args.level) { 1546 case SOL_SOCKET: 1547 name = linux_to_bsd_so_sockopt(args->optname); 1548 switch (name) { 1549 case SO_RCVTIMEO: 1550 /* FALLTHROUGH */ 1551 case SO_SNDTIMEO: 1552 tv_len = sizeof(tv); 1553 error = kern_getsockopt(td, args->s, bsd_args.level, 1554 name, &tv, UIO_SYSSPACE, &tv_len); 1555 if (error) 1556 return (error); 1557 linux_tv.tv_sec = tv.tv_sec; 1558 linux_tv.tv_usec = tv.tv_usec; 1559 return (copyout(&linux_tv, PTRIN(args->optval), 1560 sizeof(linux_tv))); 1561 /* NOTREACHED */ 1562 break; 1563 case LOCAL_PEERCRED: 1564 if (args->optlen != sizeof(lxu)) 1565 return (EINVAL); 1566 xulen = sizeof(xu); 1567 error = kern_getsockopt(td, args->s, bsd_args.level, 1568 name, &xu, UIO_SYSSPACE, &xulen); 1569 if (error) 1570 return (error); 1571 /* 1572 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1573 */ 1574 lxu.pid = 0; 1575 lxu.uid = xu.cr_uid; 1576 lxu.gid = xu.cr_gid; 1577 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1578 /* NOTREACHED */ 1579 break; 1580 default: 1581 break; 1582 } 1583 break; 1584 case IPPROTO_IP: 1585 name = linux_to_bsd_ip_sockopt(args->optname); 1586 break; 1587 case IPPROTO_TCP: 1588 /* Linux TCP option values match BSD's */ 1589 name = args->optname; 1590 break; 1591 default: 1592 name = -1; 1593 break; 1594 } 1595 if (name == -1) 1596 return (EINVAL); 1597 1598 bsd_args.name = name; 1599 bsd_args.val = PTRIN(args->optval); 1600 bsd_args.avalsize = PTRIN(args->optlen); 1601 1602 if (name == IPV6_NEXTHOP) { 1603 error = getsockopt(td, &bsd_args); 1604 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1605 } else 1606 error = getsockopt(td, &bsd_args); 1607 1608 return (error); 1609} 1610 1611/* Argument list sizes for linux_socketcall */ 1612 1613#define LINUX_AL(x) ((x) * sizeof(l_ulong)) 1614 1615static const unsigned char lxs_args[] = { 1616 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, 1617 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, 1618 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, 1619 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, 1620 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, 1621 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, 1622 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, 1623 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, 1624 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, 1625 LINUX_AL(4) /* accept4 */ 1626}; 1627 1628#define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1 1629 1630int 1631linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1632{ 1633 l_ulong a[6]; 1634 void *arg; 1635 int error; 1636 1637 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) 1638 return (EINVAL); 1639 error = copyin(PTRIN(args->args), a, lxs_args[args->what]); 1640 if (error) 1641 return (error); 1642 1643 arg = a; 1644 switch (args->what) { 1645 case LINUX_SOCKET: 1646 return (linux_socket(td, arg)); 1647 case LINUX_BIND: 1648 return (linux_bind(td, arg)); 1649 case LINUX_CONNECT: 1650 return (linux_connect(td, arg)); 1651 case LINUX_LISTEN: 1652 return (linux_listen(td, arg)); 1653 case LINUX_ACCEPT: 1654 return (linux_accept(td, arg)); 1655 case LINUX_GETSOCKNAME: 1656 return (linux_getsockname(td, arg)); 1657 case LINUX_GETPEERNAME: 1658 return (linux_getpeername(td, arg)); 1659 case LINUX_SOCKETPAIR: 1660 return (linux_socketpair(td, arg)); 1661 case LINUX_SEND: 1662 return (linux_send(td, arg)); 1663 case LINUX_RECV: 1664 return (linux_recv(td, arg)); 1665 case LINUX_SENDTO: 1666 return (linux_sendto(td, arg)); 1667 case LINUX_RECVFROM: 1668 return (linux_recvfrom(td, arg)); 1669 case LINUX_SHUTDOWN: 1670 return (linux_shutdown(td, arg)); 1671 case LINUX_SETSOCKOPT: 1672 return (linux_setsockopt(td, arg)); 1673 case LINUX_GETSOCKOPT: 1674 return (linux_getsockopt(td, arg)); 1675 case LINUX_SENDMSG: 1676 return (linux_sendmsg(td, arg)); 1677 case LINUX_RECVMSG: 1678 return (linux_recvmsg(td, arg)); 1679 case LINUX_ACCEPT4: 1680 return (linux_accept4(td, arg)); 1681 } 1682 1683 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1684 return (ENOSYS); 1685} 1686