linux_socket.c revision 226073
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 226073 2011-10-06 21:09:28Z jkim $"); 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 linux_to_bsd_domain(int); 76 77/* 78 * Reads a linux sockaddr and does any necessary translation. 79 * Linux sockaddrs don't have a length field, only a family. 80 * Copy the osockaddr structure pointed to by osa to kernel, adjust 81 * family and convert to sockaddr. 82 */ 83static int 84linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int osalen) 85{ 86 int error=0, bdom; 87 struct sockaddr *sa; 88 struct osockaddr *kosa; 89#ifdef INET6 90 int oldv6size; 91 struct sockaddr_in6 *sin6; 92#endif 93 char *name; 94 int alloclen, hdrlen, namelen; 95 96 if (osalen < 2 || osalen > UCHAR_MAX || !osa) 97 return (EINVAL); 98 99 alloclen = osalen; 100#ifdef INET6 101 oldv6size = 0; 102 /* 103 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it 104 * if it's a v4-mapped address, so reserve the proper space 105 * for it. 106 */ 107 if (alloclen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { 108 alloclen = sizeof (struct sockaddr_in6); 109 oldv6size = 1; 110 } 111#endif 112 113 kosa = malloc(alloclen, M_SONAME, M_WAITOK); 114 115 if ((error = copyin(osa, kosa, osalen))) 116 goto out; 117 118 bdom = linux_to_bsd_domain(kosa->sa_family); 119 if (bdom == -1) { 120 error = EAFNOSUPPORT; 121 goto out; 122 } 123 124#ifdef INET6 125 /* 126 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, 127 * which lacks the scope id compared with RFC2553 one. If we detect 128 * the situation, reject the address and write a message to system log. 129 * 130 * Still accept addresses for which the scope id is not used. 131 */ 132 if (oldv6size) { 133 if (bdom == AF_INET6) { 134 sin6 = (struct sockaddr_in6 *)kosa; 135 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || 136 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 137 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 138 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && 139 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 140 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { 141 sin6->sin6_scope_id = 0; 142 } else { 143 log(LOG_DEBUG, 144 "obsolete pre-RFC2553 sockaddr_in6 rejected\n"); 145 error = EINVAL; 146 goto out; 147 } 148 } else 149 alloclen -= sizeof(u_int32_t); 150 } 151#endif 152 if (bdom == AF_INET) { 153 alloclen = sizeof(struct sockaddr_in); 154 if (osalen < alloclen) { 155 error = EINVAL; 156 goto out; 157 } 158 } 159 160 if (bdom == AF_LOCAL && osalen > sizeof(struct sockaddr_un)) { 161 hdrlen = offsetof(struct sockaddr_un, sun_path); 162 name = ((struct sockaddr_un *)kosa)->sun_path; 163 if (*name == '\0') { 164 /* 165 * Linux abstract namespace starts with a NULL byte. 166 * XXX We do not support abstract namespace yet. 167 */ 168 namelen = strnlen(name + 1, osalen - hdrlen - 1) + 1; 169 } else 170 namelen = strnlen(name, osalen - hdrlen); 171 if (hdrlen + namelen > sizeof(struct sockaddr_un)) { 172 error = ENAMETOOLONG; 173 goto out; 174 } 175 alloclen = sizeof(struct sockaddr_un); 176 } 177 178 sa = (struct sockaddr *) kosa; 179 sa->sa_family = bdom; 180 sa->sa_len = alloclen; 181 182 *sap = sa; 183 return (0); 184 185out: 186 free(kosa, M_SONAME); 187 return (error); 188} 189 190static int 191linux_to_bsd_domain(int domain) 192{ 193 194 switch (domain) { 195 case LINUX_AF_UNSPEC: 196 return (AF_UNSPEC); 197 case LINUX_AF_UNIX: 198 return (AF_LOCAL); 199 case LINUX_AF_INET: 200 return (AF_INET); 201 case LINUX_AF_INET6: 202 return (AF_INET6); 203 case LINUX_AF_AX25: 204 return (AF_CCITT); 205 case LINUX_AF_IPX: 206 return (AF_IPX); 207 case LINUX_AF_APPLETALK: 208 return (AF_APPLETALK); 209 } 210 return (-1); 211} 212 213static int 214bsd_to_linux_domain(int domain) 215{ 216 217 switch (domain) { 218 case AF_UNSPEC: 219 return (LINUX_AF_UNSPEC); 220 case AF_LOCAL: 221 return (LINUX_AF_UNIX); 222 case AF_INET: 223 return (LINUX_AF_INET); 224 case AF_INET6: 225 return (LINUX_AF_INET6); 226 case AF_CCITT: 227 return (LINUX_AF_AX25); 228 case AF_IPX: 229 return (LINUX_AF_IPX); 230 case AF_APPLETALK: 231 return (LINUX_AF_APPLETALK); 232 } 233 return (-1); 234} 235 236static int 237linux_to_bsd_sockopt_level(int level) 238{ 239 240 switch (level) { 241 case LINUX_SOL_SOCKET: 242 return (SOL_SOCKET); 243 } 244 return (level); 245} 246 247static int 248bsd_to_linux_sockopt_level(int level) 249{ 250 251 switch (level) { 252 case SOL_SOCKET: 253 return (LINUX_SOL_SOCKET); 254 } 255 return (level); 256} 257 258static int 259linux_to_bsd_ip_sockopt(int opt) 260{ 261 262 switch (opt) { 263 case LINUX_IP_TOS: 264 return (IP_TOS); 265 case LINUX_IP_TTL: 266 return (IP_TTL); 267 case LINUX_IP_OPTIONS: 268 return (IP_OPTIONS); 269 case LINUX_IP_MULTICAST_IF: 270 return (IP_MULTICAST_IF); 271 case LINUX_IP_MULTICAST_TTL: 272 return (IP_MULTICAST_TTL); 273 case LINUX_IP_MULTICAST_LOOP: 274 return (IP_MULTICAST_LOOP); 275 case LINUX_IP_ADD_MEMBERSHIP: 276 return (IP_ADD_MEMBERSHIP); 277 case LINUX_IP_DROP_MEMBERSHIP: 278 return (IP_DROP_MEMBERSHIP); 279 case LINUX_IP_HDRINCL: 280 return (IP_HDRINCL); 281 } 282 return (-1); 283} 284 285static int 286linux_to_bsd_so_sockopt(int opt) 287{ 288 289 switch (opt) { 290 case LINUX_SO_DEBUG: 291 return (SO_DEBUG); 292 case LINUX_SO_REUSEADDR: 293 return (SO_REUSEADDR); 294 case LINUX_SO_TYPE: 295 return (SO_TYPE); 296 case LINUX_SO_ERROR: 297 return (SO_ERROR); 298 case LINUX_SO_DONTROUTE: 299 return (SO_DONTROUTE); 300 case LINUX_SO_BROADCAST: 301 return (SO_BROADCAST); 302 case LINUX_SO_SNDBUF: 303 return (SO_SNDBUF); 304 case LINUX_SO_RCVBUF: 305 return (SO_RCVBUF); 306 case LINUX_SO_KEEPALIVE: 307 return (SO_KEEPALIVE); 308 case LINUX_SO_OOBINLINE: 309 return (SO_OOBINLINE); 310 case LINUX_SO_LINGER: 311 return (SO_LINGER); 312 case LINUX_SO_PEERCRED: 313 return (LOCAL_PEERCRED); 314 case LINUX_SO_RCVLOWAT: 315 return (SO_RCVLOWAT); 316 case LINUX_SO_SNDLOWAT: 317 return (SO_SNDLOWAT); 318 case LINUX_SO_RCVTIMEO: 319 return (SO_RCVTIMEO); 320 case LINUX_SO_SNDTIMEO: 321 return (SO_SNDTIMEO); 322 case LINUX_SO_TIMESTAMP: 323 return (SO_TIMESTAMP); 324 case LINUX_SO_ACCEPTCONN: 325 return (SO_ACCEPTCONN); 326 } 327 return (-1); 328} 329 330static int 331linux_to_bsd_msg_flags(int flags) 332{ 333 int ret_flags = 0; 334 335 if (flags & LINUX_MSG_OOB) 336 ret_flags |= MSG_OOB; 337 if (flags & LINUX_MSG_PEEK) 338 ret_flags |= MSG_PEEK; 339 if (flags & LINUX_MSG_DONTROUTE) 340 ret_flags |= MSG_DONTROUTE; 341 if (flags & LINUX_MSG_CTRUNC) 342 ret_flags |= MSG_CTRUNC; 343 if (flags & LINUX_MSG_TRUNC) 344 ret_flags |= MSG_TRUNC; 345 if (flags & LINUX_MSG_DONTWAIT) 346 ret_flags |= MSG_DONTWAIT; 347 if (flags & LINUX_MSG_EOR) 348 ret_flags |= MSG_EOR; 349 if (flags & LINUX_MSG_WAITALL) 350 ret_flags |= MSG_WAITALL; 351 if (flags & LINUX_MSG_NOSIGNAL) 352 ret_flags |= MSG_NOSIGNAL; 353#if 0 /* not handled */ 354 if (flags & LINUX_MSG_PROXY) 355 ; 356 if (flags & LINUX_MSG_FIN) 357 ; 358 if (flags & LINUX_MSG_SYN) 359 ; 360 if (flags & LINUX_MSG_CONFIRM) 361 ; 362 if (flags & LINUX_MSG_RST) 363 ; 364 if (flags & LINUX_MSG_ERRQUEUE) 365 ; 366#endif 367 return ret_flags; 368} 369 370/* 371* If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the 372* native syscall will fault. Thus, we don't really need to check the 373* return values for these functions. 374*/ 375 376static int 377bsd_to_linux_sockaddr(struct sockaddr *arg) 378{ 379 struct sockaddr sa; 380 size_t sa_len = sizeof(struct sockaddr); 381 int error; 382 383 if ((error = copyin(arg, &sa, sa_len))) 384 return (error); 385 386 *(u_short *)&sa = sa.sa_family; 387 388 error = copyout(&sa, arg, sa_len); 389 390 return (error); 391} 392 393static int 394linux_to_bsd_sockaddr(struct sockaddr *arg, int len) 395{ 396 struct sockaddr sa; 397 size_t sa_len = sizeof(struct sockaddr); 398 int error; 399 400 if ((error = copyin(arg, &sa, sa_len))) 401 return (error); 402 403 sa.sa_family = *(sa_family_t *)&sa; 404 sa.sa_len = len; 405 406 error = copyout(&sa, arg, sa_len); 407 408 return (error); 409} 410 411 412static int 413linux_sa_put(struct osockaddr *osa) 414{ 415 struct osockaddr sa; 416 int error, bdom; 417 418 /* 419 * Only read/write the osockaddr family part, the rest is 420 * not changed. 421 */ 422 error = copyin(osa, &sa, sizeof(sa.sa_family)); 423 if (error) 424 return (error); 425 426 bdom = bsd_to_linux_domain(sa.sa_family); 427 if (bdom == -1) 428 return (EINVAL); 429 430 sa.sa_family = bdom; 431 error = copyout(&sa, osa, sizeof(sa.sa_family)); 432 if (error) 433 return (error); 434 435 return (0); 436} 437 438static int 439linux_to_bsd_cmsg_type(int cmsg_type) 440{ 441 442 switch (cmsg_type) { 443 case LINUX_SCM_RIGHTS: 444 return (SCM_RIGHTS); 445 case LINUX_SCM_CREDENTIALS: 446 return (SCM_CREDS); 447 } 448 return (-1); 449} 450 451static int 452bsd_to_linux_cmsg_type(int cmsg_type) 453{ 454 455 switch (cmsg_type) { 456 case SCM_RIGHTS: 457 return (LINUX_SCM_RIGHTS); 458 case SCM_CREDS: 459 return (LINUX_SCM_CREDENTIALS); 460 } 461 return (-1); 462} 463 464static int 465linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 466{ 467 if (lhdr->msg_controllen > INT_MAX) 468 return (ENOBUFS); 469 470 bhdr->msg_name = PTRIN(lhdr->msg_name); 471 bhdr->msg_namelen = lhdr->msg_namelen; 472 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 473 bhdr->msg_iovlen = lhdr->msg_iovlen; 474 bhdr->msg_control = PTRIN(lhdr->msg_control); 475 476 /* 477 * msg_controllen is skipped since BSD and LINUX control messages 478 * are potentially different sizes (e.g. the cred structure used 479 * by SCM_CREDS is different between the two operating system). 480 * 481 * The caller can set it (if necessary) after converting all the 482 * control messages. 483 */ 484 485 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 486 return (0); 487} 488 489static int 490bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 491{ 492 lhdr->msg_name = PTROUT(bhdr->msg_name); 493 lhdr->msg_namelen = bhdr->msg_namelen; 494 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 495 lhdr->msg_iovlen = bhdr->msg_iovlen; 496 lhdr->msg_control = PTROUT(bhdr->msg_control); 497 498 /* 499 * msg_controllen is skipped since BSD and LINUX control messages 500 * are potentially different sizes (e.g. the cred structure used 501 * by SCM_CREDS is different between the two operating system). 502 * 503 * The caller can set it (if necessary) after converting all the 504 * control messages. 505 */ 506 507 /* msg_flags skipped */ 508 return (0); 509} 510 511static int 512linux_set_socket_flags(struct thread *td, int s, int flags) 513{ 514 int error; 515 516 if (flags & LINUX_SOCK_NONBLOCK) { 517 error = kern_fcntl(td, s, F_SETFL, O_NONBLOCK); 518 if (error) 519 return (error); 520 } 521 if (flags & LINUX_SOCK_CLOEXEC) { 522 error = kern_fcntl(td, s, F_SETFD, FD_CLOEXEC); 523 if (error) 524 return (error); 525 } 526 return (0); 527} 528 529static int 530linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 531 struct mbuf *control, enum uio_seg segflg) 532{ 533 struct sockaddr *to; 534 int error; 535 536 if (mp->msg_name != NULL) { 537 error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); 538 if (error) 539 return (error); 540 mp->msg_name = to; 541 } else 542 to = NULL; 543 544 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 545 segflg); 546 547 if (to) 548 free(to, M_SONAME); 549 return (error); 550} 551 552/* Return 0 if IP_HDRINCL is set for the given socket. */ 553static int 554linux_check_hdrincl(struct thread *td, int s) 555{ 556 int error, optval, size_val; 557 558 size_val = sizeof(optval); 559 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 560 &optval, UIO_SYSSPACE, &size_val); 561 if (error) 562 return (error); 563 564 return (optval == 0); 565} 566 567struct linux_sendto_args { 568 int s; 569 l_uintptr_t msg; 570 int len; 571 int flags; 572 l_uintptr_t to; 573 int tolen; 574}; 575 576/* 577 * Updated sendto() when IP_HDRINCL is set: 578 * tweak endian-dependent fields in the IP packet. 579 */ 580static int 581linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 582{ 583/* 584 * linux_ip_copysize defines how many bytes we should copy 585 * from the beginning of the IP packet before we customize it for BSD. 586 * It should include all the fields we modify (ip_len and ip_off). 587 */ 588#define linux_ip_copysize 8 589 590 struct ip *packet; 591 struct msghdr msg; 592 struct iovec aiov[1]; 593 int error; 594 595 /* Check that the packet isn't too big or too small. */ 596 if (linux_args->len < linux_ip_copysize || 597 linux_args->len > IP_MAXPACKET) 598 return (EINVAL); 599 600 packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK); 601 602 /* Make kernel copy of the packet to be sent */ 603 if ((error = copyin(PTRIN(linux_args->msg), packet, 604 linux_args->len))) 605 goto goout; 606 607 /* Convert fields from Linux to BSD raw IP socket format */ 608 packet->ip_len = linux_args->len; 609 packet->ip_off = ntohs(packet->ip_off); 610 611 /* Prepare the msghdr and iovec structures describing the new packet */ 612 msg.msg_name = PTRIN(linux_args->to); 613 msg.msg_namelen = linux_args->tolen; 614 msg.msg_iov = aiov; 615 msg.msg_iovlen = 1; 616 msg.msg_control = NULL; 617 msg.msg_flags = 0; 618 aiov[0].iov_base = (char *)packet; 619 aiov[0].iov_len = linux_args->len; 620 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 621 NULL, UIO_SYSSPACE); 622goout: 623 free(packet, M_TEMP); 624 return (error); 625} 626 627struct linux_socket_args { 628 int domain; 629 int type; 630 int protocol; 631}; 632 633static int 634linux_socket(struct thread *td, struct linux_socket_args *args) 635{ 636 struct socket_args /* { 637 int domain; 638 int type; 639 int protocol; 640 } */ bsd_args; 641 int retval_socket, socket_flags; 642 643 bsd_args.protocol = args->protocol; 644 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK; 645 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 646 return (EINVAL); 647 bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; 648 if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) 649 return (EINVAL); 650 bsd_args.domain = linux_to_bsd_domain(args->domain); 651 if (bsd_args.domain == -1) 652 return (EAFNOSUPPORT); 653 654 retval_socket = sys_socket(td, &bsd_args); 655 if (retval_socket) 656 return (retval_socket); 657 658 retval_socket = linux_set_socket_flags(td, td->td_retval[0], 659 socket_flags); 660 if (retval_socket) { 661 (void)kern_close(td, td->td_retval[0]); 662 goto out; 663 } 664 665 if (bsd_args.type == SOCK_RAW 666 && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) 667 && bsd_args.domain == PF_INET) { 668 /* It's a raw IP socket: set the IP_HDRINCL option. */ 669 int hdrincl; 670 671 hdrincl = 1; 672 /* We ignore any error returned by kern_setsockopt() */ 673 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 674 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 675 } 676#ifdef INET6 677 /* 678 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 679 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 680 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 681 * sysctl value. 682 */ 683 if (bsd_args.domain == PF_INET6) { 684 int v6only; 685 686 v6only = 0; 687 /* We ignore any error returned by setsockopt() */ 688 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 689 &v6only, UIO_SYSSPACE, sizeof(v6only)); 690 } 691#endif 692 693out: 694 return (retval_socket); 695} 696 697struct linux_bind_args { 698 int s; 699 l_uintptr_t name; 700 int namelen; 701}; 702 703static int 704linux_bind(struct thread *td, struct linux_bind_args *args) 705{ 706 struct sockaddr *sa; 707 int error; 708 709 error = linux_getsockaddr(&sa, PTRIN(args->name), 710 args->namelen); 711 if (error) 712 return (error); 713 714 error = kern_bind(td, args->s, sa); 715 free(sa, M_SONAME); 716 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 717 return (EINVAL); 718 return (error); 719} 720 721struct linux_connect_args { 722 int s; 723 l_uintptr_t name; 724 int namelen; 725}; 726int linux_connect(struct thread *, struct linux_connect_args *); 727 728int 729linux_connect(struct thread *td, struct linux_connect_args *args) 730{ 731 struct socket *so; 732 struct sockaddr *sa; 733 u_int fflag; 734 int error; 735 736 error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), 737 args->namelen); 738 if (error) 739 return (error); 740 741 error = kern_connect(td, args->s, sa); 742 free(sa, M_SONAME); 743 if (error != EISCONN) 744 return (error); 745 746 /* 747 * Linux doesn't return EISCONN the first time it occurs, 748 * when on a non-blocking socket. Instead it returns the 749 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 750 * 751 * XXXRW: Instead of using fgetsock(), check that it is a 752 * socket and use the file descriptor reference instead of 753 * creating a new one. 754 */ 755 error = fgetsock(td, args->s, CAP_CONNECT, &so, &fflag); 756 if (error == 0) { 757 error = EISCONN; 758 if (fflag & FNONBLOCK) { 759 SOCK_LOCK(so); 760 if (so->so_emuldata == 0) 761 error = so->so_error; 762 so->so_emuldata = (void *)1; 763 SOCK_UNLOCK(so); 764 } 765 fputsock(so); 766 } 767 return (error); 768} 769 770struct linux_listen_args { 771 int s; 772 int backlog; 773}; 774 775static int 776linux_listen(struct thread *td, struct linux_listen_args *args) 777{ 778 struct listen_args /* { 779 int s; 780 int backlog; 781 } */ bsd_args; 782 783 bsd_args.s = args->s; 784 bsd_args.backlog = args->backlog; 785 return (sys_listen(td, &bsd_args)); 786} 787 788static int 789linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 790 l_uintptr_t namelen, int flags) 791{ 792 struct accept_args /* { 793 int s; 794 struct sockaddr * __restrict name; 795 socklen_t * __restrict anamelen; 796 } */ bsd_args; 797 int error; 798 799 if (flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 800 return (EINVAL); 801 802 bsd_args.s = s; 803 /* XXX: */ 804 bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); 805 bsd_args.anamelen = PTRIN(namelen);/* XXX */ 806 error = sys_accept(td, &bsd_args); 807 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); 808 if (error) { 809 if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) 810 return (EINVAL); 811 return (error); 812 } 813 814 /* 815 * linux appears not to copy flags from the parent socket to the 816 * accepted one, so we must clear the flags in the new descriptor 817 * and apply the requested flags. 818 */ 819 error = kern_fcntl(td, td->td_retval[0], F_SETFL, 0); 820 if (error) 821 goto out; 822 error = linux_set_socket_flags(td, td->td_retval[0], flags); 823 if (error) 824 goto out; 825 if (addr) 826 error = linux_sa_put(PTRIN(addr)); 827 828out: 829 if (error) { 830 (void)kern_close(td, td->td_retval[0]); 831 td->td_retval[0] = 0; 832 } 833 return (error); 834} 835 836struct linux_accept_args { 837 int s; 838 l_uintptr_t addr; 839 l_uintptr_t namelen; 840}; 841 842static int 843linux_accept(struct thread *td, struct linux_accept_args *args) 844{ 845 846 return (linux_accept_common(td, args->s, args->addr, 847 args->namelen, 0)); 848} 849 850struct linux_accept4_args { 851 int s; 852 l_uintptr_t addr; 853 l_uintptr_t namelen; 854 int flags; 855}; 856 857static int 858linux_accept4(struct thread *td, struct linux_accept4_args *args) 859{ 860 861 return (linux_accept_common(td, args->s, args->addr, 862 args->namelen, args->flags)); 863} 864 865struct linux_getsockname_args { 866 int s; 867 l_uintptr_t addr; 868 l_uintptr_t namelen; 869}; 870 871static int 872linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 873{ 874 struct getsockname_args /* { 875 int fdes; 876 struct sockaddr * __restrict asa; 877 socklen_t * __restrict alen; 878 } */ bsd_args; 879 int error; 880 881 bsd_args.fdes = args->s; 882 /* XXX: */ 883 bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); 884 bsd_args.alen = PTRIN(args->namelen); /* XXX */ 885 error = sys_getsockname(td, &bsd_args); 886 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 887 if (error) 888 return (error); 889 error = linux_sa_put(PTRIN(args->addr)); 890 if (error) 891 return (error); 892 return (0); 893} 894 895struct linux_getpeername_args { 896 int s; 897 l_uintptr_t addr; 898 l_uintptr_t namelen; 899}; 900 901static int 902linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 903{ 904 struct getpeername_args /* { 905 int fdes; 906 caddr_t asa; 907 int *alen; 908 } */ bsd_args; 909 int error; 910 911 bsd_args.fdes = args->s; 912 bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); 913 bsd_args.alen = (int *)PTRIN(args->namelen); 914 error = sys_getpeername(td, &bsd_args); 915 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); 916 if (error) 917 return (error); 918 error = linux_sa_put(PTRIN(args->addr)); 919 if (error) 920 return (error); 921 return (0); 922} 923 924struct linux_socketpair_args { 925 int domain; 926 int type; 927 int protocol; 928 l_uintptr_t rsv; 929}; 930 931static int 932linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 933{ 934 struct socketpair_args /* { 935 int domain; 936 int type; 937 int protocol; 938 int *rsv; 939 } */ bsd_args; 940 int error, socket_flags; 941 int sv[2]; 942 943 bsd_args.domain = linux_to_bsd_domain(args->domain); 944 if (bsd_args.domain != PF_LOCAL) 945 return (EAFNOSUPPORT); 946 947 socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK; 948 if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 949 return (EINVAL); 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); 953 954 if (args->protocol != 0 && args->protocol != PF_UNIX) 955 956 /* 957 * Use of PF_UNIX as protocol argument is not right, 958 * but Linux does it. 959 * Do not map PF_UNIX as its Linux value is identical 960 * to FreeBSD one. 961 */ 962 return (EPROTONOSUPPORT); 963 else 964 bsd_args.protocol = 0; 965 bsd_args.rsv = (int *)PTRIN(args->rsv); 966 error = kern_socketpair(td, bsd_args.domain, bsd_args.type, 967 bsd_args.protocol, sv); 968 if (error) 969 return (error); 970 error = linux_set_socket_flags(td, sv[0], socket_flags); 971 if (error) 972 goto out; 973 error = linux_set_socket_flags(td, sv[1], socket_flags); 974 if (error) 975 goto out; 976 977 error = copyout(sv, bsd_args.rsv, 2 * sizeof(int)); 978 979out: 980 if (error) { 981 (void)kern_close(td, sv[0]); 982 (void)kern_close(td, sv[1]); 983 } 984 return (error); 985} 986 987struct linux_send_args { 988 int s; 989 l_uintptr_t msg; 990 int len; 991 int flags; 992}; 993 994static int 995linux_send(struct thread *td, struct linux_send_args *args) 996{ 997 struct sendto_args /* { 998 int s; 999 caddr_t buf; 1000 int len; 1001 int flags; 1002 caddr_t to; 1003 int tolen; 1004 } */ bsd_args; 1005 1006 bsd_args.s = args->s; 1007 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1008 bsd_args.len = args->len; 1009 bsd_args.flags = args->flags; 1010 bsd_args.to = NULL; 1011 bsd_args.tolen = 0; 1012 return sys_sendto(td, &bsd_args); 1013} 1014 1015struct linux_recv_args { 1016 int s; 1017 l_uintptr_t msg; 1018 int len; 1019 int flags; 1020}; 1021 1022static int 1023linux_recv(struct thread *td, struct linux_recv_args *args) 1024{ 1025 struct recvfrom_args /* { 1026 int s; 1027 caddr_t buf; 1028 int len; 1029 int flags; 1030 struct sockaddr *from; 1031 socklen_t fromlenaddr; 1032 } */ bsd_args; 1033 1034 bsd_args.s = args->s; 1035 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1036 bsd_args.len = args->len; 1037 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1038 bsd_args.from = NULL; 1039 bsd_args.fromlenaddr = 0; 1040 return (sys_recvfrom(td, &bsd_args)); 1041} 1042 1043static int 1044linux_sendto(struct thread *td, struct linux_sendto_args *args) 1045{ 1046 struct msghdr msg; 1047 struct iovec aiov; 1048 int error; 1049 1050 if (linux_check_hdrincl(td, args->s) == 0) 1051 /* IP_HDRINCL set, tweak the packet before sending */ 1052 return (linux_sendto_hdrincl(td, args)); 1053 1054 msg.msg_name = PTRIN(args->to); 1055 msg.msg_namelen = args->tolen; 1056 msg.msg_iov = &aiov; 1057 msg.msg_iovlen = 1; 1058 msg.msg_control = NULL; 1059 msg.msg_flags = 0; 1060 aiov.iov_base = PTRIN(args->msg); 1061 aiov.iov_len = args->len; 1062 error = linux_sendit(td, args->s, &msg, args->flags, NULL, 1063 UIO_USERSPACE); 1064 return (error); 1065} 1066 1067struct linux_recvfrom_args { 1068 int s; 1069 l_uintptr_t buf; 1070 int len; 1071 int flags; 1072 l_uintptr_t from; 1073 l_uintptr_t fromlen; 1074}; 1075 1076static int 1077linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1078{ 1079 struct recvfrom_args /* { 1080 int s; 1081 caddr_t buf; 1082 size_t len; 1083 int flags; 1084 struct sockaddr * __restrict from; 1085 socklen_t * __restrict fromlenaddr; 1086 } */ bsd_args; 1087 size_t len; 1088 int error; 1089 1090 if ((error = copyin(PTRIN(args->fromlen), &len, sizeof(size_t)))) 1091 return (error); 1092 1093 bsd_args.s = args->s; 1094 bsd_args.buf = PTRIN(args->buf); 1095 bsd_args.len = args->len; 1096 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1097 /* XXX: */ 1098 bsd_args.from = (struct sockaddr * __restrict)PTRIN(args->from); 1099 bsd_args.fromlenaddr = PTRIN(args->fromlen);/* XXX */ 1100 1101 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len); 1102 error = sys_recvfrom(td, &bsd_args); 1103 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from); 1104 1105 if (error) 1106 return (error); 1107 if (args->from) { 1108 error = linux_sa_put((struct osockaddr *) 1109 PTRIN(args->from)); 1110 if (error) 1111 return (error); 1112 } 1113 return (0); 1114} 1115 1116struct linux_sendmsg_args { 1117 int s; 1118 l_uintptr_t msg; 1119 int flags; 1120}; 1121 1122static int 1123linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1124{ 1125 struct cmsghdr *cmsg; 1126 struct cmsgcred cmcred; 1127 struct mbuf *control; 1128 struct msghdr msg; 1129 struct l_cmsghdr linux_cmsg; 1130 struct l_cmsghdr *ptr_cmsg; 1131 struct l_msghdr linux_msg; 1132 struct iovec *iov; 1133 socklen_t datalen; 1134 struct sockaddr *sa; 1135 sa_family_t sa_family; 1136 void *data; 1137 int error; 1138 1139 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg)); 1140 if (error) 1141 return (error); 1142 1143 /* 1144 * Some Linux applications (ping) define a non-NULL control data 1145 * pointer, but a msg_controllen of 0, which is not allowed in the 1146 * FreeBSD system call interface. NULL the msg_control pointer in 1147 * order to handle this case. This should be checked, but allows the 1148 * Linux ping to work. 1149 */ 1150 if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) 1151 linux_msg.msg_control = PTROUT(NULL); 1152 1153 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1154 if (error) 1155 return (error); 1156 1157#ifdef COMPAT_LINUX32 1158 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1159 &iov, EMSGSIZE); 1160#else 1161 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1162#endif 1163 if (error) 1164 return (error); 1165 1166 control = NULL; 1167 cmsg = NULL; 1168 1169 if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { 1170 error = kern_getsockname(td, args->s, &sa, &datalen); 1171 if (error) 1172 goto bad; 1173 sa_family = sa->sa_family; 1174 free(sa, M_SONAME); 1175 1176 error = ENOBUFS; 1177 cmsg = malloc(CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO); 1178 control = m_get(M_WAIT, MT_CONTROL); 1179 if (control == NULL) 1180 goto bad; 1181 1182 do { 1183 error = copyin(ptr_cmsg, &linux_cmsg, 1184 sizeof(struct l_cmsghdr)); 1185 if (error) 1186 goto bad; 1187 1188 error = EINVAL; 1189 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) 1190 goto bad; 1191 1192 /* 1193 * Now we support only SCM_RIGHTS and SCM_CRED, 1194 * so return EINVAL in any other cmsg_type 1195 */ 1196 cmsg->cmsg_type = 1197 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1198 cmsg->cmsg_level = 1199 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1200 if (cmsg->cmsg_type == -1 1201 || cmsg->cmsg_level != SOL_SOCKET) 1202 goto bad; 1203 1204 /* 1205 * Some applications (e.g. pulseaudio) attempt to 1206 * send ancillary data even if the underlying protocol 1207 * doesn't support it which is not allowed in the 1208 * FreeBSD system call interface. 1209 */ 1210 if (sa_family != AF_UNIX) 1211 continue; 1212 1213 data = LINUX_CMSG_DATA(ptr_cmsg); 1214 datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1215 1216 switch (cmsg->cmsg_type) 1217 { 1218 case SCM_RIGHTS: 1219 break; 1220 1221 case SCM_CREDS: 1222 data = &cmcred; 1223 datalen = sizeof(cmcred); 1224 1225 /* 1226 * The lower levels will fill in the structure 1227 */ 1228 bzero(data, datalen); 1229 break; 1230 } 1231 1232 cmsg->cmsg_len = CMSG_LEN(datalen); 1233 1234 error = ENOBUFS; 1235 if (!m_append(control, CMSG_HDRSZ, (c_caddr_t) cmsg)) 1236 goto bad; 1237 if (!m_append(control, datalen, (c_caddr_t) data)) 1238 goto bad; 1239 } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); 1240 1241 if (m_length(control, NULL) == 0) { 1242 m_freem(control); 1243 control = NULL; 1244 } 1245 } 1246 1247 msg.msg_iov = iov; 1248 msg.msg_flags = 0; 1249 error = linux_sendit(td, args->s, &msg, args->flags, control, 1250 UIO_USERSPACE); 1251 1252bad: 1253 free(iov, M_IOV); 1254 if (cmsg) 1255 free(cmsg, M_TEMP); 1256 return (error); 1257} 1258 1259struct linux_recvmsg_args { 1260 int s; 1261 l_uintptr_t msg; 1262 int flags; 1263}; 1264 1265static int 1266linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1267{ 1268 struct cmsghdr *cm; 1269 struct cmsgcred *cmcred; 1270 struct msghdr msg; 1271 struct l_cmsghdr *linux_cmsg = NULL; 1272 struct l_ucred linux_ucred; 1273 socklen_t datalen, outlen; 1274 struct l_msghdr linux_msg; 1275 struct iovec *iov, *uiov; 1276 struct mbuf *control = NULL; 1277 struct mbuf **controlp; 1278 caddr_t outbuf; 1279 void *data; 1280 int error, i, fd, fds, *fdp; 1281 1282 error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg)); 1283 if (error) 1284 return (error); 1285 1286 error = linux_to_bsd_msghdr(&msg, &linux_msg); 1287 if (error) 1288 return (error); 1289 1290#ifdef COMPAT_LINUX32 1291 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1292 &iov, EMSGSIZE); 1293#else 1294 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1295#endif 1296 if (error) 1297 return (error); 1298 1299 if (msg.msg_name) { 1300 error = linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name, 1301 msg.msg_namelen); 1302 if (error) 1303 goto bad; 1304 } 1305 1306 uiov = msg.msg_iov; 1307 msg.msg_iov = iov; 1308 controlp = (msg.msg_control != NULL) ? &control : NULL; 1309 error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, controlp); 1310 msg.msg_iov = uiov; 1311 if (error) 1312 goto bad; 1313 1314 error = bsd_to_linux_msghdr(&msg, &linux_msg); 1315 if (error) 1316 goto bad; 1317 1318 if (linux_msg.msg_name) { 1319 error = bsd_to_linux_sockaddr((struct sockaddr *) 1320 PTRIN(linux_msg.msg_name)); 1321 if (error) 1322 goto bad; 1323 } 1324 if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { 1325 error = linux_sa_put(PTRIN(linux_msg.msg_name)); 1326 if (error) 1327 goto bad; 1328 } 1329 1330 outbuf = PTRIN(linux_msg.msg_control); 1331 outlen = 0; 1332 1333 if (control) { 1334 linux_cmsg = malloc(L_CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO); 1335 1336 msg.msg_control = mtod(control, struct cmsghdr *); 1337 msg.msg_controllen = control->m_len; 1338 1339 cm = CMSG_FIRSTHDR(&msg); 1340 1341 while (cm != NULL) { 1342 linux_cmsg->cmsg_type = 1343 bsd_to_linux_cmsg_type(cm->cmsg_type); 1344 linux_cmsg->cmsg_level = 1345 bsd_to_linux_sockopt_level(cm->cmsg_level); 1346 if (linux_cmsg->cmsg_type == -1 1347 || cm->cmsg_level != SOL_SOCKET) 1348 { 1349 error = EINVAL; 1350 goto bad; 1351 } 1352 1353 data = CMSG_DATA(cm); 1354 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1355 1356 switch (cm->cmsg_type) 1357 { 1358 case SCM_RIGHTS: 1359 if (args->flags & LINUX_MSG_CMSG_CLOEXEC) { 1360 fds = datalen / sizeof(int); 1361 fdp = data; 1362 for (i = 0; i < fds; i++) { 1363 fd = *fdp++; 1364 (void)kern_fcntl(td, fd, 1365 F_SETFD, FD_CLOEXEC); 1366 } 1367 } 1368 break; 1369 1370 case SCM_CREDS: 1371 /* 1372 * Currently LOCAL_CREDS is never in 1373 * effect for Linux so no need to worry 1374 * about sockcred 1375 */ 1376 if (datalen != sizeof (*cmcred)) { 1377 error = EMSGSIZE; 1378 goto bad; 1379 } 1380 cmcred = (struct cmsgcred *)data; 1381 bzero(&linux_ucred, sizeof(linux_ucred)); 1382 linux_ucred.pid = cmcred->cmcred_pid; 1383 linux_ucred.uid = cmcred->cmcred_uid; 1384 linux_ucred.gid = cmcred->cmcred_gid; 1385 data = &linux_ucred; 1386 datalen = sizeof(linux_ucred); 1387 break; 1388 } 1389 1390 if (outlen + LINUX_CMSG_LEN(datalen) > 1391 linux_msg.msg_controllen) { 1392 if (outlen == 0) { 1393 error = EMSGSIZE; 1394 goto bad; 1395 } else { 1396 linux_msg.msg_flags |= 1397 LINUX_MSG_CTRUNC; 1398 goto out; 1399 } 1400 } 1401 1402 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1403 1404 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1405 if (error) 1406 goto bad; 1407 outbuf += L_CMSG_HDRSZ; 1408 1409 error = copyout(data, outbuf, datalen); 1410 if (error) 1411 goto bad; 1412 1413 outbuf += LINUX_CMSG_ALIGN(datalen); 1414 outlen += LINUX_CMSG_LEN(datalen); 1415 1416 cm = CMSG_NXTHDR(&msg, cm); 1417 } 1418 } 1419 1420out: 1421 linux_msg.msg_controllen = outlen; 1422 error = copyout(&linux_msg, PTRIN(args->msg), sizeof(linux_msg)); 1423 1424bad: 1425 free(iov, M_IOV); 1426 if (control != NULL) 1427 m_freem(control); 1428 if (linux_cmsg != NULL) 1429 free(linux_cmsg, M_TEMP); 1430 1431 return (error); 1432} 1433 1434struct linux_shutdown_args { 1435 int s; 1436 int how; 1437}; 1438 1439static int 1440linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1441{ 1442 struct shutdown_args /* { 1443 int s; 1444 int how; 1445 } */ bsd_args; 1446 1447 bsd_args.s = args->s; 1448 bsd_args.how = args->how; 1449 return (sys_shutdown(td, &bsd_args)); 1450} 1451 1452struct linux_setsockopt_args { 1453 int s; 1454 int level; 1455 int optname; 1456 l_uintptr_t optval; 1457 int optlen; 1458}; 1459 1460static int 1461linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1462{ 1463 struct setsockopt_args /* { 1464 int s; 1465 int level; 1466 int name; 1467 caddr_t val; 1468 int valsize; 1469 } */ bsd_args; 1470 l_timeval linux_tv; 1471 struct timeval tv; 1472 int error, name; 1473 1474 bsd_args.s = args->s; 1475 bsd_args.level = linux_to_bsd_sockopt_level(args->level); 1476 switch (bsd_args.level) { 1477 case SOL_SOCKET: 1478 name = linux_to_bsd_so_sockopt(args->optname); 1479 switch (name) { 1480 case SO_RCVTIMEO: 1481 /* FALLTHROUGH */ 1482 case SO_SNDTIMEO: 1483 error = copyin(PTRIN(args->optval), &linux_tv, 1484 sizeof(linux_tv)); 1485 if (error) 1486 return (error); 1487 tv.tv_sec = linux_tv.tv_sec; 1488 tv.tv_usec = linux_tv.tv_usec; 1489 return (kern_setsockopt(td, args->s, bsd_args.level, 1490 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1491 /* NOTREACHED */ 1492 break; 1493 default: 1494 break; 1495 } 1496 break; 1497 case IPPROTO_IP: 1498 name = linux_to_bsd_ip_sockopt(args->optname); 1499 break; 1500 case IPPROTO_TCP: 1501 /* Linux TCP option values match BSD's */ 1502 name = args->optname; 1503 break; 1504 default: 1505 name = -1; 1506 break; 1507 } 1508 if (name == -1) 1509 return (ENOPROTOOPT); 1510 1511 bsd_args.name = name; 1512 bsd_args.val = PTRIN(args->optval); 1513 bsd_args.valsize = args->optlen; 1514 1515 if (name == IPV6_NEXTHOP) { 1516 linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, 1517 bsd_args.valsize); 1518 error = sys_setsockopt(td, &bsd_args); 1519 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1520 } else 1521 error = sys_setsockopt(td, &bsd_args); 1522 1523 return (error); 1524} 1525 1526struct linux_getsockopt_args { 1527 int s; 1528 int level; 1529 int optname; 1530 l_uintptr_t optval; 1531 l_uintptr_t optlen; 1532}; 1533 1534static int 1535linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1536{ 1537 struct getsockopt_args /* { 1538 int s; 1539 int level; 1540 int name; 1541 caddr_t val; 1542 int *avalsize; 1543 } */ bsd_args; 1544 l_timeval linux_tv; 1545 struct timeval tv; 1546 socklen_t tv_len, xulen; 1547 struct xucred xu; 1548 struct l_ucred lxu; 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 tv_len = sizeof(tv); 1561 error = kern_getsockopt(td, args->s, bsd_args.level, 1562 name, &tv, UIO_SYSSPACE, &tv_len); 1563 if (error) 1564 return (error); 1565 linux_tv.tv_sec = tv.tv_sec; 1566 linux_tv.tv_usec = tv.tv_usec; 1567 return (copyout(&linux_tv, PTRIN(args->optval), 1568 sizeof(linux_tv))); 1569 /* NOTREACHED */ 1570 break; 1571 case LOCAL_PEERCRED: 1572 if (args->optlen != sizeof(lxu)) 1573 return (EINVAL); 1574 xulen = sizeof(xu); 1575 error = kern_getsockopt(td, args->s, bsd_args.level, 1576 name, &xu, UIO_SYSSPACE, &xulen); 1577 if (error) 1578 return (error); 1579 /* 1580 * XXX Use 0 for pid as the FreeBSD does not cache peer pid. 1581 */ 1582 lxu.pid = 0; 1583 lxu.uid = xu.cr_uid; 1584 lxu.gid = xu.cr_gid; 1585 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1586 /* NOTREACHED */ 1587 break; 1588 default: 1589 break; 1590 } 1591 break; 1592 case IPPROTO_IP: 1593 name = linux_to_bsd_ip_sockopt(args->optname); 1594 break; 1595 case IPPROTO_TCP: 1596 /* Linux TCP option values match BSD's */ 1597 name = args->optname; 1598 break; 1599 default: 1600 name = -1; 1601 break; 1602 } 1603 if (name == -1) 1604 return (EINVAL); 1605 1606 bsd_args.name = name; 1607 bsd_args.val = PTRIN(args->optval); 1608 bsd_args.avalsize = PTRIN(args->optlen); 1609 1610 if (name == IPV6_NEXTHOP) { 1611 error = sys_getsockopt(td, &bsd_args); 1612 bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); 1613 } else 1614 error = sys_getsockopt(td, &bsd_args); 1615 1616 return (error); 1617} 1618 1619/* Argument list sizes for linux_socketcall */ 1620 1621#define LINUX_AL(x) ((x) * sizeof(l_ulong)) 1622 1623static const unsigned char lxs_args[] = { 1624 LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, 1625 LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, 1626 LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, 1627 LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, 1628 LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, 1629 LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, 1630 LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, 1631 LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, 1632 LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, 1633 LINUX_AL(4) /* accept4 */ 1634}; 1635 1636#define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1 1637 1638int 1639linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 1640{ 1641 l_ulong a[6]; 1642 void *arg; 1643 int error; 1644 1645 if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) 1646 return (EINVAL); 1647 error = copyin(PTRIN(args->args), a, lxs_args[args->what]); 1648 if (error) 1649 return (error); 1650 1651 arg = a; 1652 switch (args->what) { 1653 case LINUX_SOCKET: 1654 return (linux_socket(td, arg)); 1655 case LINUX_BIND: 1656 return (linux_bind(td, arg)); 1657 case LINUX_CONNECT: 1658 return (linux_connect(td, arg)); 1659 case LINUX_LISTEN: 1660 return (linux_listen(td, arg)); 1661 case LINUX_ACCEPT: 1662 return (linux_accept(td, arg)); 1663 case LINUX_GETSOCKNAME: 1664 return (linux_getsockname(td, arg)); 1665 case LINUX_GETPEERNAME: 1666 return (linux_getpeername(td, arg)); 1667 case LINUX_SOCKETPAIR: 1668 return (linux_socketpair(td, arg)); 1669 case LINUX_SEND: 1670 return (linux_send(td, arg)); 1671 case LINUX_RECV: 1672 return (linux_recv(td, arg)); 1673 case LINUX_SENDTO: 1674 return (linux_sendto(td, arg)); 1675 case LINUX_RECVFROM: 1676 return (linux_recvfrom(td, arg)); 1677 case LINUX_SHUTDOWN: 1678 return (linux_shutdown(td, arg)); 1679 case LINUX_SETSOCKOPT: 1680 return (linux_setsockopt(td, arg)); 1681 case LINUX_GETSOCKOPT: 1682 return (linux_getsockopt(td, arg)); 1683 case LINUX_SENDMSG: 1684 return (linux_sendmsg(td, arg)); 1685 case LINUX_RECVMSG: 1686 return (linux_recvmsg(td, arg)); 1687 case LINUX_ACCEPT4: 1688 return (linux_accept4(td, arg)); 1689 } 1690 1691 uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); 1692 return (ENOSYS); 1693} 1694