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 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1995 Søren Schmidt 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 /* XXX we use functions that might not exist. */ 33 #include "opt_compat.h" 34 #include "opt_inet6.h" 35 36 #include <sys/param.h> 37 #include <sys/proc.h> 38 #include <sys/systm.h> 39 #include <sys/sysproto.h> 40 #include <sys/capsicum.h> 41 #include <sys/fcntl.h> 42 #include <sys/file.h> 43 #include <sys/filedesc.h> 44 #include <sys/limits.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/mutex.h> 48 #include <sys/mbuf.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/syscallsubr.h> 52 #include <sys/uio.h> 53 #include <sys/stat.h> 54 #include <sys/syslog.h> 55 #include <sys/un.h> 56 #include <sys/unistd.h> 57 58 #include <security/audit/audit.h> 59 60 #include <net/if.h> 61 #include <net/vnet.h> 62 #include <netinet/in.h> 63 #include <netinet/in_systm.h> 64 #include <netinet/ip.h> 65 #include <netinet/tcp.h> 66 #ifdef INET6 67 #include <netinet/ip6.h> 68 #include <netinet6/ip6_var.h> 69 #endif 70 71 #ifdef COMPAT_LINUX32 72 #include <machine/../linux32/linux.h> 73 #include <machine/../linux32/linux32_proto.h> 74 #else 75 #include <machine/../linux/linux.h> 76 #include <machine/../linux/linux_proto.h> 77 #endif 78 #include <compat/linux/linux_common.h> 79 #include <compat/linux/linux_emul.h> 80 #include <compat/linux/linux_file.h> 81 #include <compat/linux/linux_mib.h> 82 #include <compat/linux/linux_socket.h> 83 #include <compat/linux/linux_timer.h> 84 #include <compat/linux/linux_util.h> 85 86 #define SECURITY_CONTEXT_STRING "unconfined" 87 88 static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *, 89 l_uint); 90 static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *, 91 l_uint, struct msghdr *); 92 static int linux_set_socket_flags(int, int *); 93 94 #define SOL_NETLINK 270 95 96 static int 97 linux_to_bsd_sockopt_level(int level) 98 { 99 100 if (level == LINUX_SOL_SOCKET) 101 return (SOL_SOCKET); 102 /* Remaining values are RFC-defined protocol numbers. */ 103 return (level); 104 } 105 106 static int 107 bsd_to_linux_sockopt_level(int level) 108 { 109 110 if (level == SOL_SOCKET) 111 return (LINUX_SOL_SOCKET); 112 return (level); 113 } 114 115 static int 116 linux_to_bsd_ip_sockopt(int opt) 117 { 118 119 switch (opt) { 120 /* known and translated sockopts */ 121 case LINUX_IP_TOS: 122 return (IP_TOS); 123 case LINUX_IP_TTL: 124 return (IP_TTL); 125 case LINUX_IP_HDRINCL: 126 return (IP_HDRINCL); 127 case LINUX_IP_OPTIONS: 128 return (IP_OPTIONS); 129 case LINUX_IP_RECVOPTS: 130 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVOPTS"); 131 return (IP_RECVOPTS); 132 case LINUX_IP_RETOPTS: 133 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_REETOPTS"); 134 return (IP_RETOPTS); 135 case LINUX_IP_RECVTTL: 136 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVTTL"); 137 return (IP_RECVTTL); 138 case LINUX_IP_RECVTOS: 139 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVTOS"); 140 return (IP_RECVTOS); 141 case LINUX_IP_FREEBIND: 142 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_FREEBIND"); 143 return (IP_BINDANY); 144 case LINUX_IP_IPSEC_POLICY: 145 /* we have this option, but not documented in ip(4) manpage */ 146 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_IPSEC_POLICY"); 147 return (IP_IPSEC_POLICY); 148 case LINUX_IP_MINTTL: 149 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MINTTL"); 150 return (IP_MINTTL); 151 case LINUX_IP_MULTICAST_IF: 152 return (IP_MULTICAST_IF); 153 case LINUX_IP_MULTICAST_TTL: 154 return (IP_MULTICAST_TTL); 155 case LINUX_IP_MULTICAST_LOOP: 156 return (IP_MULTICAST_LOOP); 157 case LINUX_IP_ADD_MEMBERSHIP: 158 return (IP_ADD_MEMBERSHIP); 159 case LINUX_IP_DROP_MEMBERSHIP: 160 return (IP_DROP_MEMBERSHIP); 161 case LINUX_IP_UNBLOCK_SOURCE: 162 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_UNBLOCK_SOURCE"); 163 return (IP_UNBLOCK_SOURCE); 164 case LINUX_IP_BLOCK_SOURCE: 165 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_BLOCK_SOURCE"); 166 return (IP_BLOCK_SOURCE); 167 case LINUX_IP_ADD_SOURCE_MEMBERSHIP: 168 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_ADD_SOURCE_MEMBERSHIP"); 169 return (IP_ADD_SOURCE_MEMBERSHIP); 170 case LINUX_IP_DROP_SOURCE_MEMBERSHIP: 171 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_DROP_SOURCE_MEMBERSHIP"); 172 return (IP_DROP_SOURCE_MEMBERSHIP); 173 case LINUX_MCAST_JOIN_GROUP: 174 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_JOIN_GROUP"); 175 return (MCAST_JOIN_GROUP); 176 case LINUX_MCAST_LEAVE_GROUP: 177 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_LEAVE_GROUP"); 178 return (MCAST_LEAVE_GROUP); 179 case LINUX_MCAST_JOIN_SOURCE_GROUP: 180 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_JOIN_SOURCE_GROUP"); 181 return (MCAST_JOIN_SOURCE_GROUP); 182 case LINUX_MCAST_LEAVE_SOURCE_GROUP: 183 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_LEAVE_SOURCE_GROUP"); 184 return (MCAST_LEAVE_SOURCE_GROUP); 185 case LINUX_IP_RECVORIGDSTADDR: 186 return (IP_RECVORIGDSTADDR); 187 188 /* known but not implemented sockopts */ 189 case LINUX_IP_ROUTER_ALERT: 190 LINUX_RATELIMIT_MSG_OPT1( 191 "unsupported IPv4 socket option IP_ROUTER_ALERT (%d), you can not do user-space routing from linux programs", 192 opt); 193 return (-2); 194 case LINUX_IP_PKTINFO: 195 LINUX_RATELIMIT_MSG_OPT1( 196 "unsupported IPv4 socket option IP_PKTINFO (%d), you can not get extended packet info for datagram sockets in linux programs", 197 opt); 198 return (-2); 199 case LINUX_IP_PKTOPTIONS: 200 LINUX_RATELIMIT_MSG_OPT1( 201 "unsupported IPv4 socket option IP_PKTOPTIONS (%d)", 202 opt); 203 return (-2); 204 case LINUX_IP_MTU_DISCOVER: 205 LINUX_RATELIMIT_MSG_OPT1( 206 "unsupported IPv4 socket option IP_MTU_DISCOVER (%d), your linux program can not control path-MTU discovery", 207 opt); 208 return (-2); 209 case LINUX_IP_RECVERR: 210 /* needed by steam */ 211 LINUX_RATELIMIT_MSG_OPT1( 212 "unsupported IPv4 socket option IP_RECVERR (%d), you can not get extended reliability info in linux programs", 213 opt); 214 return (-2); 215 case LINUX_IP_MTU: 216 LINUX_RATELIMIT_MSG_OPT1( 217 "unsupported IPv4 socket option IP_MTU (%d), your linux program can not control the MTU on this socket", 218 opt); 219 return (-2); 220 case LINUX_IP_XFRM_POLICY: 221 LINUX_RATELIMIT_MSG_OPT1( 222 "unsupported IPv4 socket option IP_XFRM_POLICY (%d)", 223 opt); 224 return (-2); 225 case LINUX_IP_PASSSEC: 226 /* needed by steam */ 227 LINUX_RATELIMIT_MSG_OPT1( 228 "unsupported IPv4 socket option IP_PASSSEC (%d), you can not get IPSEC related credential information associated with this socket in linux programs -- if you do not use IPSEC, you can ignore this", 229 opt); 230 return (-2); 231 case LINUX_IP_TRANSPARENT: 232 /* IP_BINDANY or more? */ 233 LINUX_RATELIMIT_MSG_OPT1( 234 "unsupported IPv4 socket option IP_TRANSPARENT (%d), you can not enable transparent proxying in linux programs -- note, IP_FREEBIND is supported, no idea if the FreeBSD IP_BINDANY is equivalent to the Linux IP_TRANSPARENT or not, any info is welcome", 235 opt); 236 return (-2); 237 case LINUX_IP_NODEFRAG: 238 LINUX_RATELIMIT_MSG_OPT1( 239 "unsupported IPv4 socket option IP_NODEFRAG (%d)", 240 opt); 241 return (-2); 242 case LINUX_IP_CHECKSUM: 243 LINUX_RATELIMIT_MSG_OPT1( 244 "unsupported IPv4 socket option IP_CHECKSUM (%d)", 245 opt); 246 return (-2); 247 case LINUX_IP_BIND_ADDRESS_NO_PORT: 248 LINUX_RATELIMIT_MSG_OPT1( 249 "unsupported IPv4 socket option IP_BIND_ADDRESS_NO_PORT (%d)", 250 opt); 251 return (-2); 252 case LINUX_IP_RECVFRAGSIZE: 253 LINUX_RATELIMIT_MSG_OPT1( 254 "unsupported IPv4 socket option IP_RECVFRAGSIZE (%d)", 255 opt); 256 return (-2); 257 case LINUX_MCAST_MSFILTER: 258 LINUX_RATELIMIT_MSG_OPT1( 259 "unsupported IPv4 socket option IP_MCAST_MSFILTER (%d)", 260 opt); 261 return (-2); 262 case LINUX_IP_MULTICAST_ALL: 263 LINUX_RATELIMIT_MSG_OPT1( 264 "unsupported IPv4 socket option IP_MULTICAST_ALL (%d), your linux program will not see all multicast groups joined by the entire system, only those the program joined itself on this socket", 265 opt); 266 return (-2); 267 case LINUX_IP_UNICAST_IF: 268 LINUX_RATELIMIT_MSG_OPT1( 269 "unsupported IPv4 socket option IP_UNICAST_IF (%d)", 270 opt); 271 return (-2); 272 273 /* unknown sockopts */ 274 default: 275 return (-1); 276 } 277 } 278 279 static int 280 linux_to_bsd_ip6_sockopt(int opt) 281 { 282 283 switch (opt) { 284 /* known and translated sockopts */ 285 case LINUX_IPV6_2292PKTINFO: 286 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292PKTINFO"); 287 return (IPV6_2292PKTINFO); 288 case LINUX_IPV6_2292HOPOPTS: 289 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292HOPOPTS"); 290 return (IPV6_2292HOPOPTS); 291 case LINUX_IPV6_2292DSTOPTS: 292 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292DSTOPTS"); 293 return (IPV6_2292DSTOPTS); 294 case LINUX_IPV6_2292RTHDR: 295 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292RTHDR"); 296 return (IPV6_2292RTHDR); 297 case LINUX_IPV6_2292PKTOPTIONS: 298 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292PKTOPTIONS"); 299 return (IPV6_2292PKTOPTIONS); 300 case LINUX_IPV6_CHECKSUM: 301 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_CHECKSUM"); 302 return (IPV6_CHECKSUM); 303 case LINUX_IPV6_2292HOPLIMIT: 304 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292HOPLIMIT"); 305 return (IPV6_2292HOPLIMIT); 306 case LINUX_IPV6_NEXTHOP: 307 return (IPV6_NEXTHOP); 308 case LINUX_IPV6_UNICAST_HOPS: 309 return (IPV6_UNICAST_HOPS); 310 case LINUX_IPV6_MULTICAST_IF: 311 return (IPV6_MULTICAST_IF); 312 case LINUX_IPV6_MULTICAST_HOPS: 313 return (IPV6_MULTICAST_HOPS); 314 case LINUX_IPV6_MULTICAST_LOOP: 315 return (IPV6_MULTICAST_LOOP); 316 case LINUX_IPV6_ADD_MEMBERSHIP: 317 return (IPV6_JOIN_GROUP); 318 case LINUX_IPV6_DROP_MEMBERSHIP: 319 return (IPV6_LEAVE_GROUP); 320 case LINUX_IPV6_V6ONLY: 321 return (IPV6_V6ONLY); 322 case LINUX_IPV6_IPSEC_POLICY: 323 /* we have this option, but not documented in ip6(4) manpage */ 324 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_IPSEC_POLICY"); 325 return (IPV6_IPSEC_POLICY); 326 case LINUX_MCAST_JOIN_GROUP: 327 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_JOIN_GROUP"); 328 return (IPV6_JOIN_GROUP); 329 case LINUX_MCAST_LEAVE_GROUP: 330 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_LEAVE_GROUP"); 331 return (IPV6_LEAVE_GROUP); 332 case LINUX_IPV6_RECVPKTINFO: 333 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVPKTINFO"); 334 return (IPV6_RECVPKTINFO); 335 case LINUX_IPV6_PKTINFO: 336 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_PKTINFO"); 337 return (IPV6_PKTINFO); 338 case LINUX_IPV6_RECVHOPLIMIT: 339 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVHOPLIMIT"); 340 return (IPV6_RECVHOPLIMIT); 341 case LINUX_IPV6_HOPLIMIT: 342 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_HOPLIMIT"); 343 return (IPV6_HOPLIMIT); 344 case LINUX_IPV6_RECVHOPOPTS: 345 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVHOPOPTS"); 346 return (IPV6_RECVHOPOPTS); 347 case LINUX_IPV6_HOPOPTS: 348 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_HOPOPTS"); 349 return (IPV6_HOPOPTS); 350 case LINUX_IPV6_RTHDRDSTOPTS: 351 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RTHDRDSTOPTS"); 352 return (IPV6_RTHDRDSTOPTS); 353 case LINUX_IPV6_RECVRTHDR: 354 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVRTHDR"); 355 return (IPV6_RECVRTHDR); 356 case LINUX_IPV6_RTHDR: 357 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RTHDR"); 358 return (IPV6_RTHDR); 359 case LINUX_IPV6_RECVDSTOPTS: 360 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVDSTOPTS"); 361 return (IPV6_RECVDSTOPTS); 362 case LINUX_IPV6_DSTOPTS: 363 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_DSTOPTS"); 364 return (IPV6_DSTOPTS); 365 case LINUX_IPV6_RECVPATHMTU: 366 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVPATHMTU"); 367 return (IPV6_RECVPATHMTU); 368 case LINUX_IPV6_PATHMTU: 369 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_PATHMTU"); 370 return (IPV6_PATHMTU); 371 case LINUX_IPV6_DONTFRAG: 372 return (IPV6_DONTFRAG); 373 case LINUX_IPV6_AUTOFLOWLABEL: 374 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_AUTOFLOWLABEL"); 375 return (IPV6_AUTOFLOWLABEL); 376 case LINUX_IPV6_ORIGDSTADDR: 377 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_ORIGDSTADDR"); 378 return (IPV6_ORIGDSTADDR); 379 case LINUX_IPV6_FREEBIND: 380 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_FREEBIND"); 381 return (IPV6_BINDANY); 382 383 /* known but not implemented sockopts */ 384 case LINUX_IPV6_ADDRFORM: 385 LINUX_RATELIMIT_MSG_OPT1( 386 "unsupported IPv6 socket option IPV6_ADDRFORM (%d), you linux program can not convert the socket to IPv4", 387 opt); 388 return (-2); 389 case LINUX_IPV6_AUTHHDR: 390 LINUX_RATELIMIT_MSG_OPT1( 391 "unsupported IPv6 socket option IPV6_AUTHHDR (%d), your linux program can not get the authentication header info of IPv6 packets", 392 opt); 393 return (-2); 394 case LINUX_IPV6_FLOWINFO: 395 LINUX_RATELIMIT_MSG_OPT1( 396 "unsupported IPv6 socket option IPV6_FLOWINFO (%d), your linux program can not get the flowid of IPv6 packets", 397 opt); 398 return (-2); 399 case LINUX_IPV6_ROUTER_ALERT: 400 LINUX_RATELIMIT_MSG_OPT1( 401 "unsupported IPv6 socket option IPV6_ROUTER_ALERT (%d), you can not do user-space routing from linux programs", 402 opt); 403 return (-2); 404 case LINUX_IPV6_MTU_DISCOVER: 405 LINUX_RATELIMIT_MSG_OPT1( 406 "unsupported IPv6 socket option IPV6_MTU_DISCOVER (%d), your linux program can not control path-MTU discovery", 407 opt); 408 return (-2); 409 case LINUX_IPV6_MTU: 410 LINUX_RATELIMIT_MSG_OPT1( 411 "unsupported IPv6 socket option IPV6_MTU (%d), your linux program can not control the MTU on this socket", 412 opt); 413 return (-2); 414 case LINUX_IPV6_JOIN_ANYCAST: 415 LINUX_RATELIMIT_MSG_OPT1( 416 "unsupported IPv6 socket option IPV6_JOIN_ANYCAST (%d)", 417 opt); 418 return (-2); 419 case LINUX_IPV6_LEAVE_ANYCAST: 420 LINUX_RATELIMIT_MSG_OPT1( 421 "unsupported IPv6 socket option IPV6_LEAVE_ANYCAST (%d)", 422 opt); 423 return (-2); 424 case LINUX_IPV6_MULTICAST_ALL: 425 LINUX_RATELIMIT_MSG_OPT1( 426 "unsupported IPv6 socket option IPV6_MULTICAST_ALL (%d)", 427 opt); 428 return (-2); 429 case LINUX_IPV6_ROUTER_ALERT_ISOLATE: 430 LINUX_RATELIMIT_MSG_OPT1( 431 "unsupported IPv6 socket option IPV6_ROUTER_ALERT_ISOLATE (%d)", 432 opt); 433 return (-2); 434 case LINUX_IPV6_FLOWLABEL_MGR: 435 LINUX_RATELIMIT_MSG_OPT1( 436 "unsupported IPv6 socket option IPV6_FLOWLABEL_MGR (%d)", 437 opt); 438 return (-2); 439 case LINUX_IPV6_FLOWINFO_SEND: 440 LINUX_RATELIMIT_MSG_OPT1( 441 "unsupported IPv6 socket option IPV6_FLOWINFO_SEND (%d)", 442 opt); 443 return (-2); 444 case LINUX_IPV6_XFRM_POLICY: 445 LINUX_RATELIMIT_MSG_OPT1( 446 "unsupported IPv6 socket option IPV6_XFRM_POLICY (%d)", 447 opt); 448 return (-2); 449 case LINUX_IPV6_HDRINCL: 450 LINUX_RATELIMIT_MSG_OPT1( 451 "unsupported IPv6 socket option IPV6_HDRINCL (%d)", 452 opt); 453 return (-2); 454 case LINUX_MCAST_BLOCK_SOURCE: 455 LINUX_RATELIMIT_MSG_OPT1( 456 "unsupported IPv6 socket option MCAST_BLOCK_SOURCE (%d), your linux program may see more multicast stuff than it wants", 457 opt); 458 return (-2); 459 case LINUX_MCAST_UNBLOCK_SOURCE: 460 LINUX_RATELIMIT_MSG_OPT1( 461 "unsupported IPv6 socket option MCAST_UNBLOCK_SOURCE (%d), your linux program may not see all the multicast stuff it wants", 462 opt); 463 return (-2); 464 case LINUX_MCAST_JOIN_SOURCE_GROUP: 465 LINUX_RATELIMIT_MSG_OPT1( 466 "unsupported IPv6 socket option MCAST_JOIN_SOURCE_GROUP (%d), your linux program is not able to join a multicast source group", 467 opt); 468 return (-2); 469 case LINUX_MCAST_LEAVE_SOURCE_GROUP: 470 LINUX_RATELIMIT_MSG_OPT1( 471 "unsupported IPv6 socket option MCAST_LEAVE_SOURCE_GROUP (%d), your linux program is not able to leave a multicast source group -- but it was also not able to join one, so no issue", 472 opt); 473 return (-2); 474 case LINUX_MCAST_MSFILTER: 475 LINUX_RATELIMIT_MSG_OPT1( 476 "unsupported IPv6 socket option MCAST_MSFILTER (%d), your linux program can not manipulate the multicast filter, it may see more multicast data than it wants to see", 477 opt); 478 return (-2); 479 case LINUX_IPV6_ADDR_PREFERENCES: 480 LINUX_RATELIMIT_MSG_OPT1( 481 "unsupported IPv6 socket option IPV6_ADDR_PREFERENCES (%d)", 482 opt); 483 return (-2); 484 case LINUX_IPV6_MINHOPCOUNT: 485 LINUX_RATELIMIT_MSG_OPT1( 486 "unsupported IPv6 socket option IPV6_MINHOPCOUNT (%d)", 487 opt); 488 return (-2); 489 case LINUX_IPV6_TRANSPARENT: 490 /* IP_BINDANY or more? */ 491 LINUX_RATELIMIT_MSG_OPT1( 492 "unsupported IPv6 socket option IPV6_TRANSPARENT (%d), you can not enable transparent proxying in linux programs -- note, IP_FREEBIND is supported, no idea if the FreeBSD IP_BINDANY is equivalent to the Linux IP_TRANSPARENT or not, any info is welcome", 493 opt); 494 return (-2); 495 case LINUX_IPV6_UNICAST_IF: 496 LINUX_RATELIMIT_MSG_OPT1( 497 "unsupported IPv6 socket option IPV6_UNICAST_IF (%d)", 498 opt); 499 return (-2); 500 case LINUX_IPV6_RECVFRAGSIZE: 501 LINUX_RATELIMIT_MSG_OPT1( 502 "unsupported IPv6 socket option IPV6_RECVFRAGSIZE (%d)", 503 opt); 504 return (-2); 505 506 /* unknown sockopts */ 507 default: 508 return (-1); 509 } 510 } 511 512 static int 513 linux_to_bsd_so_sockopt(int opt) 514 { 515 516 switch (opt) { 517 case LINUX_SO_DEBUG: 518 return (SO_DEBUG); 519 case LINUX_SO_REUSEADDR: 520 return (SO_REUSEADDR); 521 case LINUX_SO_TYPE: 522 return (SO_TYPE); 523 case LINUX_SO_ERROR: 524 return (SO_ERROR); 525 case LINUX_SO_DONTROUTE: 526 return (SO_DONTROUTE); 527 case LINUX_SO_BROADCAST: 528 return (SO_BROADCAST); 529 case LINUX_SO_SNDBUF: 530 case LINUX_SO_SNDBUFFORCE: 531 return (SO_SNDBUF); 532 case LINUX_SO_RCVBUF: 533 case LINUX_SO_RCVBUFFORCE: 534 return (SO_RCVBUF); 535 case LINUX_SO_KEEPALIVE: 536 return (SO_KEEPALIVE); 537 case LINUX_SO_OOBINLINE: 538 return (SO_OOBINLINE); 539 case LINUX_SO_LINGER: 540 return (SO_LINGER); 541 case LINUX_SO_REUSEPORT: 542 return (SO_REUSEPORT_LB); 543 case LINUX_SO_PASSCRED: 544 return (LOCAL_CREDS_PERSISTENT); 545 case LINUX_SO_PEERCRED: 546 return (LOCAL_PEERCRED); 547 case LINUX_SO_RCVLOWAT: 548 return (SO_RCVLOWAT); 549 case LINUX_SO_SNDLOWAT: 550 return (SO_SNDLOWAT); 551 case LINUX_SO_RCVTIMEO: 552 return (SO_RCVTIMEO); 553 case LINUX_SO_SNDTIMEO: 554 return (SO_SNDTIMEO); 555 case LINUX_SO_TIMESTAMPO: 556 case LINUX_SO_TIMESTAMPN: 557 return (SO_TIMESTAMP); 558 case LINUX_SO_TIMESTAMPNSO: 559 case LINUX_SO_TIMESTAMPNSN: 560 return (SO_BINTIME); 561 case LINUX_SO_ACCEPTCONN: 562 return (SO_ACCEPTCONN); 563 case LINUX_SO_PROTOCOL: 564 return (SO_PROTOCOL); 565 case LINUX_SO_DOMAIN: 566 return (SO_DOMAIN); 567 } 568 return (-1); 569 } 570 571 static int 572 linux_to_bsd_tcp_sockopt(int opt) 573 { 574 575 switch (opt) { 576 case LINUX_TCP_NODELAY: 577 return (TCP_NODELAY); 578 case LINUX_TCP_MAXSEG: 579 return (TCP_MAXSEG); 580 case LINUX_TCP_CORK: 581 return (TCP_NOPUSH); 582 case LINUX_TCP_KEEPIDLE: 583 return (TCP_KEEPIDLE); 584 case LINUX_TCP_KEEPINTVL: 585 return (TCP_KEEPINTVL); 586 case LINUX_TCP_KEEPCNT: 587 return (TCP_KEEPCNT); 588 case LINUX_TCP_INFO: 589 LINUX_RATELIMIT_MSG_OPT1( 590 "unsupported TCP socket option TCP_INFO (%d)", opt); 591 return (-2); 592 case LINUX_TCP_MD5SIG: 593 return (TCP_MD5SIG); 594 } 595 return (-1); 596 } 597 598 static int 599 linux_to_bsd_msg_flags(int flags) 600 { 601 int ret_flags = 0; 602 603 if (flags & LINUX_MSG_OOB) 604 ret_flags |= MSG_OOB; 605 if (flags & LINUX_MSG_PEEK) 606 ret_flags |= MSG_PEEK; 607 if (flags & LINUX_MSG_DONTROUTE) 608 ret_flags |= MSG_DONTROUTE; 609 if (flags & LINUX_MSG_CTRUNC) 610 ret_flags |= MSG_CTRUNC; 611 if (flags & LINUX_MSG_TRUNC) 612 ret_flags |= MSG_TRUNC; 613 if (flags & LINUX_MSG_DONTWAIT) 614 ret_flags |= MSG_DONTWAIT; 615 if (flags & LINUX_MSG_EOR) 616 ret_flags |= MSG_EOR; 617 if (flags & LINUX_MSG_WAITALL) 618 ret_flags |= MSG_WAITALL; 619 if (flags & LINUX_MSG_NOSIGNAL) 620 ret_flags |= MSG_NOSIGNAL; 621 if (flags & LINUX_MSG_PROXY) 622 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_PROXY (%d) not handled", 623 LINUX_MSG_PROXY); 624 if (flags & LINUX_MSG_FIN) 625 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_FIN (%d) not handled", 626 LINUX_MSG_FIN); 627 if (flags & LINUX_MSG_SYN) 628 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_SYN (%d) not handled", 629 LINUX_MSG_SYN); 630 if (flags & LINUX_MSG_CONFIRM) 631 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_CONFIRM (%d) not handled", 632 LINUX_MSG_CONFIRM); 633 if (flags & LINUX_MSG_RST) 634 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_RST (%d) not handled", 635 LINUX_MSG_RST); 636 if (flags & LINUX_MSG_ERRQUEUE) 637 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_ERRQUEUE (%d) not handled", 638 LINUX_MSG_ERRQUEUE); 639 return (ret_flags); 640 } 641 642 static int 643 linux_to_bsd_cmsg_type(int cmsg_type) 644 { 645 646 switch (cmsg_type) { 647 case LINUX_SCM_RIGHTS: 648 return (SCM_RIGHTS); 649 case LINUX_SCM_CREDENTIALS: 650 return (SCM_CREDS); 651 } 652 return (-1); 653 } 654 655 static int 656 bsd_to_linux_ip_cmsg_type(int cmsg_type) 657 { 658 659 switch (cmsg_type) { 660 case IP_RECVORIGDSTADDR: 661 return (LINUX_IP_RECVORIGDSTADDR); 662 } 663 return (-1); 664 } 665 666 static int 667 bsd_to_linux_cmsg_type(struct proc *p, int cmsg_type, int cmsg_level) 668 { 669 struct linux_pemuldata *pem; 670 671 if (cmsg_level == IPPROTO_IP) 672 return (bsd_to_linux_ip_cmsg_type(cmsg_type)); 673 if (cmsg_level != SOL_SOCKET) 674 return (-1); 675 676 pem = pem_find(p); 677 678 switch (cmsg_type) { 679 case SCM_RIGHTS: 680 return (LINUX_SCM_RIGHTS); 681 case SCM_CREDS: 682 return (LINUX_SCM_CREDENTIALS); 683 case SCM_CREDS2: 684 return (LINUX_SCM_CREDENTIALS); 685 case SCM_TIMESTAMP: 686 return (pem->so_timestamp); 687 case SCM_BINTIME: 688 return (pem->so_timestampns); 689 } 690 return (-1); 691 } 692 693 static int 694 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 695 { 696 if (lhdr->msg_controllen > INT_MAX) 697 return (ENOBUFS); 698 699 bhdr->msg_name = PTRIN(lhdr->msg_name); 700 bhdr->msg_namelen = lhdr->msg_namelen; 701 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 702 bhdr->msg_iovlen = lhdr->msg_iovlen; 703 bhdr->msg_control = PTRIN(lhdr->msg_control); 704 705 /* 706 * msg_controllen is skipped since BSD and LINUX control messages 707 * are potentially different sizes (e.g. the cred structure used 708 * by SCM_CREDS is different between the two operating system). 709 * 710 * The caller can set it (if necessary) after converting all the 711 * control messages. 712 */ 713 714 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 715 return (0); 716 } 717 718 static int 719 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 720 { 721 lhdr->msg_name = PTROUT(bhdr->msg_name); 722 lhdr->msg_namelen = bhdr->msg_namelen; 723 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 724 lhdr->msg_iovlen = bhdr->msg_iovlen; 725 lhdr->msg_control = PTROUT(bhdr->msg_control); 726 727 /* 728 * msg_controllen is skipped since BSD and LINUX control messages 729 * are potentially different sizes (e.g. the cred structure used 730 * by SCM_CREDS is different between the two operating system). 731 * 732 * The caller can set it (if necessary) after converting all the 733 * control messages. 734 */ 735 736 /* msg_flags skipped */ 737 return (0); 738 } 739 740 static int 741 linux_set_socket_flags(int lflags, int *flags) 742 { 743 744 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 745 return (EINVAL); 746 if (lflags & LINUX_SOCK_NONBLOCK) 747 *flags |= SOCK_NONBLOCK; 748 if (lflags & LINUX_SOCK_CLOEXEC) 749 *flags |= SOCK_CLOEXEC; 750 return (0); 751 } 752 753 static int 754 linux_copyout_sockaddr(const struct sockaddr *sa, void *uaddr, size_t len) 755 { 756 struct l_sockaddr *lsa; 757 int error; 758 759 error = bsd_to_linux_sockaddr(sa, &lsa, len); 760 if (error != 0) 761 return (error); 762 763 error = copyout(lsa, uaddr, len); 764 free(lsa, M_LINUX); 765 766 return (error); 767 } 768 769 static int 770 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 771 struct mbuf *control, enum uio_seg segflg) 772 { 773 struct sockaddr *to; 774 int error, len; 775 776 if (mp->msg_name != NULL) { 777 len = mp->msg_namelen; 778 error = linux_to_bsd_sockaddr(mp->msg_name, &to, &len); 779 if (error != 0) 780 return (error); 781 mp->msg_name = to; 782 } else 783 to = NULL; 784 785 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 786 segflg); 787 788 if (to) 789 free(to, M_SONAME); 790 return (error); 791 } 792 793 /* Return 0 if IP_HDRINCL is set for the given socket. */ 794 static int 795 linux_check_hdrincl(struct thread *td, int s) 796 { 797 int error, optval; 798 socklen_t size_val; 799 800 size_val = sizeof(optval); 801 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 802 &optval, UIO_SYSSPACE, &size_val); 803 if (error != 0) 804 return (error); 805 806 return (optval == 0); 807 } 808 809 /* 810 * Updated sendto() when IP_HDRINCL is set: 811 * tweak endian-dependent fields in the IP packet. 812 */ 813 static int 814 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 815 { 816 /* 817 * linux_ip_copysize defines how many bytes we should copy 818 * from the beginning of the IP packet before we customize it for BSD. 819 * It should include all the fields we modify (ip_len and ip_off). 820 */ 821 #define linux_ip_copysize 8 822 823 struct ip *packet; 824 struct msghdr msg; 825 struct iovec aiov[1]; 826 int error; 827 828 /* Check that the packet isn't too big or too small. */ 829 if (linux_args->len < linux_ip_copysize || 830 linux_args->len > IP_MAXPACKET) 831 return (EINVAL); 832 833 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK); 834 835 /* Make kernel copy of the packet to be sent */ 836 if ((error = copyin(PTRIN(linux_args->msg), packet, 837 linux_args->len))) 838 goto goout; 839 840 /* Convert fields from Linux to BSD raw IP socket format */ 841 packet->ip_len = linux_args->len; 842 packet->ip_off = ntohs(packet->ip_off); 843 844 /* Prepare the msghdr and iovec structures describing the new packet */ 845 msg.msg_name = PTRIN(linux_args->to); 846 msg.msg_namelen = linux_args->tolen; 847 msg.msg_iov = aiov; 848 msg.msg_iovlen = 1; 849 msg.msg_control = NULL; 850 msg.msg_flags = 0; 851 aiov[0].iov_base = (char *)packet; 852 aiov[0].iov_len = linux_args->len; 853 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 854 NULL, UIO_SYSSPACE); 855 goout: 856 free(packet, M_LINUX); 857 return (error); 858 } 859 860 static const char *linux_netlink_names[] = { 861 [LINUX_NETLINK_ROUTE] = "ROUTE", 862 [LINUX_NETLINK_SOCK_DIAG] = "SOCK_DIAG", 863 [LINUX_NETLINK_NFLOG] = "NFLOG", 864 [LINUX_NETLINK_SELINUX] = "SELINUX", 865 [LINUX_NETLINK_AUDIT] = "AUDIT", 866 [LINUX_NETLINK_FIB_LOOKUP] = "FIB_LOOKUP", 867 [LINUX_NETLINK_NETFILTER] = "NETFILTER", 868 [LINUX_NETLINK_KOBJECT_UEVENT] = "KOBJECT_UEVENT", 869 }; 870 871 int 872 linux_socket(struct thread *td, struct linux_socket_args *args) 873 { 874 int domain, retval_socket, type; 875 876 type = args->type & LINUX_SOCK_TYPE_MASK; 877 if (type < 0 || type > LINUX_SOCK_MAX) 878 return (EINVAL); 879 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 880 &type); 881 if (retval_socket != 0) 882 return (retval_socket); 883 domain = linux_to_bsd_domain(args->domain); 884 if (domain == -1) { 885 /* Mask off SOCK_NONBLOCK / CLOEXEC for error messages. */ 886 type = args->type & LINUX_SOCK_TYPE_MASK; 887 if (args->domain == LINUX_AF_NETLINK && 888 args->protocol == LINUX_NETLINK_AUDIT) { 889 ; /* Do nothing, quietly. */ 890 } else if (args->domain == LINUX_AF_NETLINK) { 891 const char *nl_name; 892 893 if (args->protocol >= 0 && 894 args->protocol < nitems(linux_netlink_names)) 895 nl_name = linux_netlink_names[args->protocol]; 896 else 897 nl_name = NULL; 898 if (nl_name != NULL) 899 linux_msg(curthread, 900 "unsupported socket(AF_NETLINK, %d, " 901 "NETLINK_%s)", type, nl_name); 902 else 903 linux_msg(curthread, 904 "unsupported socket(AF_NETLINK, %d, %d)", 905 type, args->protocol); 906 } else { 907 linux_msg(curthread, "unsupported socket domain %d, " 908 "type %d, protocol %d", args->domain, type, 909 args->protocol); 910 } 911 return (EAFNOSUPPORT); 912 } 913 914 retval_socket = kern_socket(td, domain, type, args->protocol); 915 if (retval_socket) 916 return (retval_socket); 917 918 if (type == SOCK_RAW 919 && (args->protocol == IPPROTO_RAW || args->protocol == 0) 920 && domain == PF_INET) { 921 /* It's a raw IP socket: set the IP_HDRINCL option. */ 922 int hdrincl; 923 924 hdrincl = 1; 925 /* We ignore any error returned by kern_setsockopt() */ 926 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 927 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 928 } 929 #ifdef INET6 930 /* 931 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 932 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 933 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 934 * sysctl value. 935 */ 936 if (domain == PF_INET6) { 937 int v6only; 938 939 v6only = 0; 940 /* We ignore any error returned by setsockopt() */ 941 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 942 &v6only, UIO_SYSSPACE, sizeof(v6only)); 943 } 944 #endif 945 946 return (retval_socket); 947 } 948 949 int 950 linux_bind(struct thread *td, struct linux_bind_args *args) 951 { 952 struct sockaddr *sa; 953 int error; 954 955 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, 956 &args->namelen); 957 if (error != 0) 958 return (error); 959 960 error = kern_bindat(td, AT_FDCWD, args->s, sa); 961 free(sa, M_SONAME); 962 963 /* XXX */ 964 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 965 return (EINVAL); 966 return (error); 967 } 968 969 int 970 linux_connect(struct thread *td, struct linux_connect_args *args) 971 { 972 struct socket *so; 973 struct sockaddr *sa; 974 struct file *fp; 975 u_int fflag; 976 int error; 977 978 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, 979 &args->namelen); 980 if (error != 0) 981 return (error); 982 983 error = kern_connectat(td, AT_FDCWD, args->s, sa); 984 free(sa, M_SONAME); 985 if (error != EISCONN) 986 return (error); 987 988 /* 989 * Linux doesn't return EISCONN the first time it occurs, 990 * when on a non-blocking socket. Instead it returns the 991 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 992 */ 993 error = getsock_cap(td, args->s, &cap_connect_rights, 994 &fp, &fflag, NULL); 995 if (error != 0) 996 return (error); 997 998 error = EISCONN; 999 so = fp->f_data; 1000 if (fflag & FNONBLOCK) { 1001 SOCK_LOCK(so); 1002 if (so->so_emuldata == 0) 1003 error = so->so_error; 1004 so->so_emuldata = (void *)1; 1005 SOCK_UNLOCK(so); 1006 } 1007 fdrop(fp, td); 1008 1009 return (error); 1010 } 1011 1012 int 1013 linux_listen(struct thread *td, struct linux_listen_args *args) 1014 { 1015 1016 return (kern_listen(td, args->s, args->backlog)); 1017 } 1018 1019 static int 1020 linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 1021 l_uintptr_t namelen, int flags) 1022 { 1023 struct sockaddr *sa; 1024 struct file *fp, *fp1; 1025 int bflags, len; 1026 struct socket *so; 1027 int error, error1; 1028 1029 bflags = 0; 1030 fp = NULL; 1031 sa = NULL; 1032 1033 error = linux_set_socket_flags(flags, &bflags); 1034 if (error != 0) 1035 return (error); 1036 1037 if (PTRIN(addr) == NULL) { 1038 len = 0; 1039 error = kern_accept4(td, s, NULL, NULL, bflags, NULL); 1040 } else { 1041 error = copyin(PTRIN(namelen), &len, sizeof(len)); 1042 if (error != 0) 1043 return (error); 1044 if (len < 0) 1045 return (EINVAL); 1046 error = kern_accept4(td, s, &sa, &len, bflags, &fp); 1047 } 1048 1049 /* 1050 * Translate errno values into ones used by Linux. 1051 */ 1052 if (error != 0) { 1053 /* 1054 * XXX. This is wrong, different sockaddr structures 1055 * have different sizes. 1056 */ 1057 switch (error) { 1058 case EFAULT: 1059 if (namelen != sizeof(struct sockaddr_in)) 1060 error = EINVAL; 1061 break; 1062 case EINVAL: 1063 error1 = getsock_cap(td, s, &cap_accept_rights, &fp1, NULL, NULL); 1064 if (error1 != 0) { 1065 error = error1; 1066 break; 1067 } 1068 so = fp1->f_data; 1069 if (so->so_type == SOCK_DGRAM) 1070 error = EOPNOTSUPP; 1071 fdrop(fp1, td); 1072 break; 1073 } 1074 return (error); 1075 } 1076 1077 if (len != 0) { 1078 error = linux_copyout_sockaddr(sa, PTRIN(addr), len); 1079 if (error == 0) 1080 error = copyout(&len, PTRIN(namelen), 1081 sizeof(len)); 1082 if (error != 0) { 1083 fdclose(td, fp, td->td_retval[0]); 1084 td->td_retval[0] = 0; 1085 } 1086 } 1087 if (fp != NULL) 1088 fdrop(fp, td); 1089 free(sa, M_SONAME); 1090 return (error); 1091 } 1092 1093 int 1094 linux_accept(struct thread *td, struct linux_accept_args *args) 1095 { 1096 1097 return (linux_accept_common(td, args->s, args->addr, 1098 args->namelen, 0)); 1099 } 1100 1101 int 1102 linux_accept4(struct thread *td, struct linux_accept4_args *args) 1103 { 1104 1105 return (linux_accept_common(td, args->s, args->addr, 1106 args->namelen, args->flags)); 1107 } 1108 1109 int 1110 linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 1111 { 1112 struct sockaddr *sa; 1113 int len, error; 1114 1115 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 1116 if (error != 0) 1117 return (error); 1118 1119 error = kern_getsockname(td, args->s, &sa, &len); 1120 if (error != 0) 1121 return (error); 1122 1123 if (len != 0) 1124 error = linux_copyout_sockaddr(sa, PTRIN(args->addr), len); 1125 1126 free(sa, M_SONAME); 1127 if (error == 0) 1128 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 1129 return (error); 1130 } 1131 1132 int 1133 linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 1134 { 1135 struct sockaddr *sa; 1136 int len, error; 1137 1138 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 1139 if (error != 0) 1140 return (error); 1141 if (len < 0) 1142 return (EINVAL); 1143 1144 error = kern_getpeername(td, args->s, &sa, &len); 1145 if (error != 0) 1146 return (error); 1147 1148 if (len != 0) 1149 error = linux_copyout_sockaddr(sa, PTRIN(args->addr), len); 1150 1151 free(sa, M_SONAME); 1152 if (error == 0) 1153 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 1154 return (error); 1155 } 1156 1157 int 1158 linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 1159 { 1160 int domain, error, sv[2], type; 1161 1162 domain = linux_to_bsd_domain(args->domain); 1163 if (domain != PF_LOCAL) 1164 return (EAFNOSUPPORT); 1165 type = args->type & LINUX_SOCK_TYPE_MASK; 1166 if (type < 0 || type > LINUX_SOCK_MAX) 1167 return (EINVAL); 1168 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 1169 &type); 1170 if (error != 0) 1171 return (error); 1172 if (args->protocol != 0 && args->protocol != PF_UNIX) { 1173 /* 1174 * Use of PF_UNIX as protocol argument is not right, 1175 * but Linux does it. 1176 * Do not map PF_UNIX as its Linux value is identical 1177 * to FreeBSD one. 1178 */ 1179 return (EPROTONOSUPPORT); 1180 } 1181 error = kern_socketpair(td, domain, type, 0, sv); 1182 if (error != 0) 1183 return (error); 1184 error = copyout(sv, PTRIN(args->rsv), 2 * sizeof(int)); 1185 if (error != 0) { 1186 (void)kern_close(td, sv[0]); 1187 (void)kern_close(td, sv[1]); 1188 } 1189 return (error); 1190 } 1191 1192 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1193 struct linux_send_args { 1194 register_t s; 1195 register_t msg; 1196 register_t len; 1197 register_t flags; 1198 }; 1199 1200 static int 1201 linux_send(struct thread *td, struct linux_send_args *args) 1202 { 1203 struct sendto_args /* { 1204 int s; 1205 caddr_t buf; 1206 int len; 1207 int flags; 1208 caddr_t to; 1209 int tolen; 1210 } */ bsd_args; 1211 struct file *fp; 1212 int error, fflag; 1213 1214 bsd_args.s = args->s; 1215 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1216 bsd_args.len = args->len; 1217 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1218 bsd_args.to = NULL; 1219 bsd_args.tolen = 0; 1220 error = sys_sendto(td, &bsd_args); 1221 if (error == ENOTCONN) { 1222 /* 1223 * Linux doesn't return ENOTCONN for non-blocking sockets. 1224 * Instead it returns the EAGAIN. 1225 */ 1226 error = getsock_cap(td, args->s, &cap_send_rights, &fp, 1227 &fflag, NULL); 1228 if (error == 0) { 1229 if (fflag & FNONBLOCK) 1230 error = EAGAIN; 1231 fdrop(fp, td); 1232 } 1233 } 1234 return (error); 1235 } 1236 1237 struct linux_recv_args { 1238 register_t s; 1239 register_t msg; 1240 register_t len; 1241 register_t flags; 1242 }; 1243 1244 static int 1245 linux_recv(struct thread *td, struct linux_recv_args *args) 1246 { 1247 struct recvfrom_args /* { 1248 int s; 1249 caddr_t buf; 1250 int len; 1251 int flags; 1252 struct sockaddr *from; 1253 socklen_t fromlenaddr; 1254 } */ bsd_args; 1255 1256 bsd_args.s = args->s; 1257 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1258 bsd_args.len = args->len; 1259 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1260 bsd_args.from = NULL; 1261 bsd_args.fromlenaddr = 0; 1262 return (sys_recvfrom(td, &bsd_args)); 1263 } 1264 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1265 1266 int 1267 linux_sendto(struct thread *td, struct linux_sendto_args *args) 1268 { 1269 struct msghdr msg; 1270 struct iovec aiov; 1271 struct socket *so; 1272 struct file *fp; 1273 int error; 1274 1275 if (linux_check_hdrincl(td, args->s) == 0) 1276 /* IP_HDRINCL set, tweak the packet before sending */ 1277 return (linux_sendto_hdrincl(td, args)); 1278 1279 bzero(&msg, sizeof(msg)); 1280 error = getsock_cap(td, args->s, &cap_send_connect_rights, 1281 &fp, NULL, NULL); 1282 if (error != 0) 1283 return (error); 1284 so = fp->f_data; 1285 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0) { 1286 msg.msg_name = PTRIN(args->to); 1287 msg.msg_namelen = args->tolen; 1288 } 1289 msg.msg_iov = &aiov; 1290 msg.msg_iovlen = 1; 1291 aiov.iov_base = PTRIN(args->msg); 1292 aiov.iov_len = args->len; 1293 fdrop(fp, td); 1294 return (linux_sendit(td, args->s, &msg, args->flags, NULL, 1295 UIO_USERSPACE)); 1296 } 1297 1298 int 1299 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1300 { 1301 struct sockaddr *sa; 1302 struct msghdr msg; 1303 struct iovec aiov; 1304 int error, fromlen; 1305 1306 if (PTRIN(args->fromlen) != NULL) { 1307 error = copyin(PTRIN(args->fromlen), &fromlen, 1308 sizeof(fromlen)); 1309 if (error != 0) 1310 return (error); 1311 if (fromlen < 0) 1312 return (EINVAL); 1313 fromlen = min(fromlen, SOCK_MAXADDRLEN); 1314 sa = malloc(fromlen, M_SONAME, M_WAITOK); 1315 } else { 1316 fromlen = 0; 1317 sa = NULL; 1318 } 1319 1320 msg.msg_name = sa; 1321 msg.msg_namelen = fromlen; 1322 msg.msg_iov = &aiov; 1323 msg.msg_iovlen = 1; 1324 aiov.iov_base = PTRIN(args->buf); 1325 aiov.iov_len = args->len; 1326 msg.msg_control = 0; 1327 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1328 1329 error = kern_recvit(td, args->s, &msg, UIO_SYSSPACE, NULL); 1330 if (error != 0) 1331 goto out; 1332 1333 /* 1334 * XXX. Seems that FreeBSD is different from Linux here. Linux 1335 * fill source address if underlying protocol provides it, while 1336 * FreeBSD fill it if underlying protocol is not connection-oriented. 1337 * So, kern_recvit() set msg.msg_namelen to 0 if protocol pr_flags 1338 * does not contains PR_ADDR flag. 1339 */ 1340 if (PTRIN(args->from) != NULL && msg.msg_namelen != 0) 1341 error = linux_copyout_sockaddr(sa, PTRIN(args->from), 1342 msg.msg_namelen); 1343 1344 if (error == 0 && PTRIN(args->fromlen) != NULL) 1345 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1346 sizeof(msg.msg_namelen)); 1347 out: 1348 free(sa, M_SONAME); 1349 return (error); 1350 } 1351 1352 static int 1353 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1354 l_uint flags) 1355 { 1356 struct cmsghdr *cmsg; 1357 struct mbuf *control; 1358 struct msghdr msg; 1359 struct l_cmsghdr linux_cmsg; 1360 struct l_cmsghdr *ptr_cmsg; 1361 struct l_msghdr linux_msghdr; 1362 struct iovec *iov; 1363 socklen_t datalen; 1364 struct sockaddr *sa; 1365 struct socket *so; 1366 sa_family_t sa_family; 1367 struct file *fp; 1368 void *data; 1369 l_size_t len; 1370 l_size_t clen; 1371 int error, fflag; 1372 1373 error = copyin(msghdr, &linux_msghdr, sizeof(linux_msghdr)); 1374 if (error != 0) 1375 return (error); 1376 1377 /* 1378 * Some Linux applications (ping) define a non-NULL control data 1379 * pointer, but a msg_controllen of 0, which is not allowed in the 1380 * FreeBSD system call interface. NULL the msg_control pointer in 1381 * order to handle this case. This should be checked, but allows the 1382 * Linux ping to work. 1383 */ 1384 if (PTRIN(linux_msghdr.msg_control) != NULL && 1385 linux_msghdr.msg_controllen == 0) 1386 linux_msghdr.msg_control = PTROUT(NULL); 1387 1388 error = linux_to_bsd_msghdr(&msg, &linux_msghdr); 1389 if (error != 0) 1390 return (error); 1391 1392 #ifdef COMPAT_LINUX32 1393 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1394 &iov, EMSGSIZE); 1395 #else 1396 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1397 #endif 1398 if (error != 0) 1399 return (error); 1400 1401 control = NULL; 1402 1403 error = kern_getsockname(td, s, &sa, &datalen); 1404 if (error != 0) 1405 goto bad; 1406 sa_family = sa->sa_family; 1407 free(sa, M_SONAME); 1408 1409 if (flags & LINUX_MSG_OOB) { 1410 error = EOPNOTSUPP; 1411 if (sa_family == AF_UNIX) 1412 goto bad; 1413 1414 error = getsock_cap(td, s, &cap_send_rights, &fp, 1415 &fflag, NULL); 1416 if (error != 0) 1417 goto bad; 1418 so = fp->f_data; 1419 if (so->so_type != SOCK_STREAM) 1420 error = EOPNOTSUPP; 1421 fdrop(fp, td); 1422 if (error != 0) 1423 goto bad; 1424 } 1425 1426 if (linux_msghdr.msg_controllen >= sizeof(struct l_cmsghdr)) { 1427 error = ENOBUFS; 1428 control = m_get(M_WAITOK, MT_CONTROL); 1429 MCLGET(control, M_WAITOK); 1430 data = mtod(control, void *); 1431 datalen = 0; 1432 1433 ptr_cmsg = PTRIN(linux_msghdr.msg_control); 1434 clen = linux_msghdr.msg_controllen; 1435 do { 1436 error = copyin(ptr_cmsg, &linux_cmsg, 1437 sizeof(struct l_cmsghdr)); 1438 if (error != 0) 1439 goto bad; 1440 1441 error = EINVAL; 1442 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr) || 1443 linux_cmsg.cmsg_len > clen) 1444 goto bad; 1445 1446 if (datalen + CMSG_HDRSZ > MCLBYTES) 1447 goto bad; 1448 1449 /* 1450 * Now we support only SCM_RIGHTS and SCM_CRED, 1451 * so return EINVAL in any other cmsg_type 1452 */ 1453 cmsg = data; 1454 cmsg->cmsg_type = 1455 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1456 cmsg->cmsg_level = 1457 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1458 if (cmsg->cmsg_type == -1 1459 || cmsg->cmsg_level != SOL_SOCKET) { 1460 linux_msg(curthread, 1461 "unsupported sendmsg cmsg level %d type %d", 1462 linux_cmsg.cmsg_level, linux_cmsg.cmsg_type); 1463 goto bad; 1464 } 1465 1466 /* 1467 * Some applications (e.g. pulseaudio) attempt to 1468 * send ancillary data even if the underlying protocol 1469 * doesn't support it which is not allowed in the 1470 * FreeBSD system call interface. 1471 */ 1472 if (sa_family != AF_UNIX) 1473 goto next; 1474 1475 if (cmsg->cmsg_type == SCM_CREDS) { 1476 len = sizeof(struct cmsgcred); 1477 if (datalen + CMSG_SPACE(len) > MCLBYTES) 1478 goto bad; 1479 1480 /* 1481 * The lower levels will fill in the structure 1482 */ 1483 memset(CMSG_DATA(data), 0, len); 1484 } else { 1485 len = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1486 if (datalen + CMSG_SPACE(len) < datalen || 1487 datalen + CMSG_SPACE(len) > MCLBYTES) 1488 goto bad; 1489 1490 error = copyin(LINUX_CMSG_DATA(ptr_cmsg), 1491 CMSG_DATA(data), len); 1492 if (error != 0) 1493 goto bad; 1494 } 1495 1496 cmsg->cmsg_len = CMSG_LEN(len); 1497 data = (char *)data + CMSG_SPACE(len); 1498 datalen += CMSG_SPACE(len); 1499 1500 next: 1501 if (clen <= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)) 1502 break; 1503 1504 clen -= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len); 1505 ptr_cmsg = (struct l_cmsghdr *)((char *)ptr_cmsg + 1506 LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)); 1507 } while(clen >= sizeof(struct l_cmsghdr)); 1508 1509 control->m_len = datalen; 1510 if (datalen == 0) { 1511 m_freem(control); 1512 control = NULL; 1513 } 1514 } 1515 1516 msg.msg_iov = iov; 1517 msg.msg_flags = 0; 1518 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1519 control = NULL; 1520 1521 bad: 1522 m_freem(control); 1523 free(iov, M_IOV); 1524 return (error); 1525 } 1526 1527 int 1528 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1529 { 1530 1531 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1532 args->flags)); 1533 } 1534 1535 int 1536 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1537 { 1538 struct l_mmsghdr *msg; 1539 l_uint retval; 1540 int error, datagrams; 1541 1542 if (args->vlen > UIO_MAXIOV) 1543 args->vlen = UIO_MAXIOV; 1544 1545 msg = PTRIN(args->msg); 1546 datagrams = 0; 1547 while (datagrams < args->vlen) { 1548 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1549 args->flags); 1550 if (error != 0) 1551 break; 1552 1553 retval = td->td_retval[0]; 1554 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1555 if (error != 0) 1556 break; 1557 ++msg; 1558 ++datagrams; 1559 } 1560 if (error == 0) 1561 td->td_retval[0] = datagrams; 1562 return (error); 1563 } 1564 1565 static int 1566 recvmsg_scm_rights(struct thread *td, l_uint flags, socklen_t *datalen, 1567 void **data, void **udata) 1568 { 1569 int i, fd, fds, *fdp; 1570 1571 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1572 fds = *datalen / sizeof(int); 1573 fdp = *data; 1574 for (i = 0; i < fds; i++) { 1575 fd = *fdp++; 1576 (void)kern_fcntl(td, fd, F_SETFD, FD_CLOEXEC); 1577 } 1578 } 1579 return (0); 1580 } 1581 1582 1583 static int 1584 recvmsg_scm_creds(socklen_t *datalen, void **data, void **udata) 1585 { 1586 struct cmsgcred *cmcred; 1587 struct l_ucred lu; 1588 1589 cmcred = *data; 1590 lu.pid = cmcred->cmcred_pid; 1591 lu.uid = cmcred->cmcred_uid; 1592 lu.gid = cmcred->cmcred_gid; 1593 memmove(*data, &lu, sizeof(lu)); 1594 *datalen = sizeof(lu); 1595 return (0); 1596 } 1597 _Static_assert(sizeof(struct cmsgcred) >= sizeof(struct l_ucred), 1598 "scm_creds sizeof l_ucred"); 1599 1600 static int 1601 recvmsg_scm_creds2(socklen_t *datalen, void **data, void **udata) 1602 { 1603 struct sockcred2 *scred; 1604 struct l_ucred lu; 1605 1606 scred = *data; 1607 lu.pid = scred->sc_pid; 1608 lu.uid = scred->sc_uid; 1609 lu.gid = scred->sc_gid; 1610 memmove(*data, &lu, sizeof(lu)); 1611 *datalen = sizeof(lu); 1612 return (0); 1613 } 1614 _Static_assert(sizeof(struct sockcred2) >= sizeof(struct l_ucred), 1615 "scm_creds2 sizeof l_ucred"); 1616 1617 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1618 static int 1619 recvmsg_scm_timestamp(l_int msg_type, socklen_t *datalen, void **data, 1620 void **udata) 1621 { 1622 l_sock_timeval ltv64; 1623 l_timeval ltv; 1624 struct timeval *tv; 1625 socklen_t len; 1626 void *buf; 1627 1628 if (*datalen != sizeof(struct timeval)) 1629 return (EMSGSIZE); 1630 1631 tv = *data; 1632 #if defined(COMPAT_LINUX32) 1633 if (msg_type == LINUX_SCM_TIMESTAMPO && 1634 (tv->tv_sec > INT_MAX || tv->tv_sec < INT_MIN)) 1635 return (EOVERFLOW); 1636 #endif 1637 if (msg_type == LINUX_SCM_TIMESTAMPN) 1638 len = sizeof(ltv64); 1639 else 1640 len = sizeof(ltv); 1641 1642 buf = malloc(len, M_LINUX, M_WAITOK); 1643 if (msg_type == LINUX_SCM_TIMESTAMPN) { 1644 ltv64.tv_sec = tv->tv_sec; 1645 ltv64.tv_usec = tv->tv_usec; 1646 memmove(buf, <v64, len); 1647 } else { 1648 ltv.tv_sec = tv->tv_sec; 1649 ltv.tv_usec = tv->tv_usec; 1650 memmove(buf, <v, len); 1651 } 1652 *data = *udata = buf; 1653 *datalen = len; 1654 return (0); 1655 } 1656 #else 1657 _Static_assert(sizeof(struct timeval) == sizeof(l_timeval), 1658 "scm_timestamp sizeof l_timeval"); 1659 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1660 1661 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1662 static int 1663 recvmsg_scm_timestampns(l_int msg_type, socklen_t *datalen, void **data, 1664 void **udata) 1665 { 1666 struct l_timespec64 ts64; 1667 struct l_timespec ts32; 1668 struct timespec ts; 1669 socklen_t len; 1670 void *buf; 1671 1672 if (msg_type == LINUX_SCM_TIMESTAMPNSO) 1673 len = sizeof(ts32); 1674 else 1675 len = sizeof(ts64); 1676 1677 buf = malloc(len, M_LINUX, M_WAITOK); 1678 bintime2timespec(*data, &ts); 1679 if (msg_type == LINUX_SCM_TIMESTAMPNSO) { 1680 ts32.tv_sec = ts.tv_sec; 1681 ts32.tv_nsec = ts.tv_nsec; 1682 memmove(buf, &ts32, len); 1683 } else { 1684 ts64.tv_sec = ts.tv_sec; 1685 ts64.tv_nsec = ts.tv_nsec; 1686 memmove(buf, &ts64, len); 1687 } 1688 *data = *udata = buf; 1689 *datalen = len; 1690 return (0); 1691 } 1692 #else 1693 static int 1694 recvmsg_scm_timestampns(l_int msg_type, socklen_t *datalen, void **data, 1695 void **udata) 1696 { 1697 struct timespec ts; 1698 1699 bintime2timespec(*data, &ts); 1700 memmove(*data, &ts, sizeof(struct timespec)); 1701 *datalen = sizeof(struct timespec); 1702 return (0); 1703 } 1704 _Static_assert(sizeof(struct bintime) >= sizeof(struct timespec), 1705 "scm_timestampns sizeof timespec"); 1706 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1707 1708 static int 1709 recvmsg_scm_ip_origdstaddr(socklen_t *datalen, void **data, void **udata) 1710 { 1711 struct l_sockaddr *lsa; 1712 int error; 1713 1714 error = bsd_to_linux_sockaddr(*data, &lsa, *datalen); 1715 if (error == 0) { 1716 *data = *udata = lsa; 1717 *datalen = sizeof(*lsa); 1718 } 1719 return (error); 1720 } 1721 1722 static int 1723 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1724 l_uint flags, struct msghdr *msg) 1725 { 1726 struct proc *p = td->td_proc; 1727 struct cmsghdr *cm; 1728 struct l_cmsghdr *lcm = NULL; 1729 socklen_t datalen, maxlen, outlen; 1730 struct l_msghdr l_msghdr; 1731 struct iovec *iov, *uiov; 1732 struct mbuf *m, *control = NULL; 1733 struct mbuf **controlp; 1734 struct sockaddr *sa; 1735 caddr_t outbuf; 1736 void *data, *udata; 1737 int error; 1738 1739 error = copyin(msghdr, &l_msghdr, sizeof(l_msghdr)); 1740 if (error != 0) 1741 return (error); 1742 1743 /* 1744 * Pass user-supplied recvmsg() flags in msg_flags field, 1745 * following sys_recvmsg() convention. 1746 */ 1747 l_msghdr.msg_flags = flags; 1748 1749 error = linux_to_bsd_msghdr(msg, &l_msghdr); 1750 if (error != 0) 1751 return (error); 1752 1753 #ifdef COMPAT_LINUX32 1754 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1755 &iov, EMSGSIZE); 1756 #else 1757 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1758 #endif 1759 if (error != 0) 1760 return (error); 1761 1762 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1763 msg->msg_namelen = min(msg->msg_namelen, SOCK_MAXADDRLEN); 1764 sa = malloc(msg->msg_namelen, M_SONAME, M_WAITOK); 1765 msg->msg_name = sa; 1766 } else { 1767 sa = NULL; 1768 msg->msg_name = NULL; 1769 } 1770 1771 uiov = msg->msg_iov; 1772 msg->msg_iov = iov; 1773 controlp = (msg->msg_control != NULL) ? &control : NULL; 1774 error = kern_recvit(td, s, msg, UIO_SYSSPACE, controlp); 1775 msg->msg_iov = uiov; 1776 if (error != 0) 1777 goto bad; 1778 1779 /* 1780 * Note that kern_recvit() updates msg->msg_namelen. 1781 */ 1782 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1783 msg->msg_name = PTRIN(l_msghdr.msg_name); 1784 error = linux_copyout_sockaddr(sa, msg->msg_name, 1785 msg->msg_namelen); 1786 if (error != 0) 1787 goto bad; 1788 } 1789 1790 error = bsd_to_linux_msghdr(msg, &l_msghdr); 1791 if (error != 0) 1792 goto bad; 1793 1794 maxlen = l_msghdr.msg_controllen; 1795 l_msghdr.msg_controllen = 0; 1796 if (control == NULL) 1797 goto out; 1798 1799 lcm = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1800 msg->msg_control = mtod(control, struct cmsghdr *); 1801 msg->msg_controllen = control->m_len; 1802 outbuf = PTRIN(l_msghdr.msg_control); 1803 outlen = 0; 1804 for (m = control; m != NULL; m = m->m_next) { 1805 cm = mtod(m, struct cmsghdr *); 1806 lcm->cmsg_type = bsd_to_linux_cmsg_type(p, cm->cmsg_type, 1807 cm->cmsg_level); 1808 lcm->cmsg_level = bsd_to_linux_sockopt_level(cm->cmsg_level); 1809 1810 data = CMSG_DATA(cm); 1811 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1812 udata = NULL; 1813 error = 0; 1814 1815 /* Process non SOL_SOCKET types. */ 1816 if (cm->cmsg_level == IPPROTO_IP && 1817 lcm->cmsg_type == LINUX_IP_ORIGDSTADDR) { 1818 error = recvmsg_scm_ip_origdstaddr(&datalen, &data, &udata); 1819 goto cont; 1820 } 1821 1822 if (lcm->cmsg_type == -1 || 1823 cm->cmsg_level != SOL_SOCKET) { 1824 LINUX_RATELIMIT_MSG_OPT2( 1825 "unsupported recvmsg cmsg level %d type %d", 1826 cm->cmsg_level, cm->cmsg_type); 1827 error = EINVAL; 1828 goto bad; 1829 } 1830 1831 1832 switch (cm->cmsg_type) { 1833 case SCM_RIGHTS: 1834 error = recvmsg_scm_rights(td, flags, 1835 &datalen, &data, &udata); 1836 break; 1837 case SCM_CREDS: 1838 error = recvmsg_scm_creds(&datalen, 1839 &data, &udata); 1840 break; 1841 case SCM_CREDS2: 1842 error = recvmsg_scm_creds2(&datalen, 1843 &data, &udata); 1844 break; 1845 case SCM_TIMESTAMP: 1846 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1847 error = recvmsg_scm_timestamp(lcm->cmsg_type, 1848 &datalen, &data, &udata); 1849 #endif 1850 break; 1851 case SCM_BINTIME: 1852 error = recvmsg_scm_timestampns(lcm->cmsg_type, 1853 &datalen, &data, &udata); 1854 break; 1855 } 1856 1857 cont: 1858 if (error != 0) 1859 goto bad; 1860 1861 if (outlen + LINUX_CMSG_LEN(datalen) > maxlen) { 1862 if (outlen == 0) { 1863 error = EMSGSIZE; 1864 goto err; 1865 } else { 1866 l_msghdr.msg_flags |= LINUX_MSG_CTRUNC; 1867 m_dispose_extcontrolm(control); 1868 free(udata, M_LINUX); 1869 goto out; 1870 } 1871 } 1872 1873 lcm->cmsg_len = LINUX_CMSG_LEN(datalen); 1874 error = copyout(lcm, outbuf, L_CMSG_HDRSZ); 1875 if (error == 0) { 1876 outbuf += L_CMSG_HDRSZ; 1877 error = copyout(data, outbuf, datalen); 1878 if (error == 0) { 1879 outbuf += LINUX_CMSG_ALIGN(datalen); 1880 outlen += LINUX_CMSG_LEN(datalen); 1881 } 1882 } 1883 err: 1884 free(udata, M_LINUX); 1885 if (error != 0) 1886 goto bad; 1887 } 1888 l_msghdr.msg_controllen = outlen; 1889 1890 out: 1891 error = copyout(&l_msghdr, msghdr, sizeof(l_msghdr)); 1892 1893 bad: 1894 if (control != NULL) { 1895 if (error != 0) 1896 m_dispose_extcontrolm(control); 1897 m_freem(control); 1898 } 1899 free(iov, M_IOV); 1900 free(lcm, M_LINUX); 1901 free(sa, M_SONAME); 1902 1903 return (error); 1904 } 1905 1906 int 1907 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1908 { 1909 struct msghdr bsd_msg; 1910 struct file *fp; 1911 int error; 1912 1913 error = getsock_cap(td, args->s, &cap_recv_rights, 1914 &fp, NULL, NULL); 1915 if (error != 0) 1916 return (error); 1917 fdrop(fp, td); 1918 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1919 args->flags, &bsd_msg)); 1920 } 1921 1922 static int 1923 linux_recvmmsg_common(struct thread *td, l_int s, struct l_mmsghdr *msg, 1924 l_uint vlen, l_uint flags, struct timespec *tts) 1925 { 1926 struct msghdr bsd_msg; 1927 struct timespec ts; 1928 struct file *fp; 1929 l_uint retval; 1930 int error, datagrams; 1931 1932 error = getsock_cap(td, s, &cap_recv_rights, 1933 &fp, NULL, NULL); 1934 if (error != 0) 1935 return (error); 1936 datagrams = 0; 1937 while (datagrams < vlen) { 1938 error = linux_recvmsg_common(td, s, &msg->msg_hdr, 1939 flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1940 if (error != 0) 1941 break; 1942 1943 retval = td->td_retval[0]; 1944 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1945 if (error != 0) 1946 break; 1947 ++msg; 1948 ++datagrams; 1949 1950 /* 1951 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1952 */ 1953 if (flags & LINUX_MSG_WAITFORONE) 1954 flags |= LINUX_MSG_DONTWAIT; 1955 1956 /* 1957 * See BUGS section of recvmmsg(2). 1958 */ 1959 if (tts) { 1960 getnanotime(&ts); 1961 timespecsub(&ts, tts, &ts); 1962 if (!timespecisset(&ts) || ts.tv_sec > 0) 1963 break; 1964 } 1965 /* Out of band data, return right away. */ 1966 if (bsd_msg.msg_flags & MSG_OOB) 1967 break; 1968 } 1969 if (error == 0) 1970 td->td_retval[0] = datagrams; 1971 fdrop(fp, td); 1972 return (error); 1973 } 1974 1975 int 1976 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1977 { 1978 struct timespec ts, tts, *ptts; 1979 int error; 1980 1981 if (args->timeout) { 1982 error = linux_get_timespec(&ts, args->timeout); 1983 if (error != 0) 1984 return (error); 1985 getnanotime(&tts); 1986 timespecadd(&tts, &ts, &tts); 1987 ptts = &tts; 1988 } 1989 else ptts = NULL; 1990 1991 return (linux_recvmmsg_common(td, args->s, PTRIN(args->msg), 1992 args->vlen, args->flags, ptts)); 1993 } 1994 1995 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1996 int 1997 linux_recvmmsg_time64(struct thread *td, struct linux_recvmmsg_time64_args *args) 1998 { 1999 struct timespec ts, tts, *ptts; 2000 int error; 2001 2002 if (args->timeout) { 2003 error = linux_get_timespec64(&ts, args->timeout); 2004 if (error != 0) 2005 return (error); 2006 getnanotime(&tts); 2007 timespecadd(&tts, &ts, &tts); 2008 ptts = &tts; 2009 } 2010 else ptts = NULL; 2011 2012 return (linux_recvmmsg_common(td, args->s, PTRIN(args->msg), 2013 args->vlen, args->flags, ptts)); 2014 } 2015 #endif 2016 2017 int 2018 linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 2019 { 2020 2021 return (kern_shutdown(td, args->s, args->how)); 2022 } 2023 2024 int 2025 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 2026 { 2027 struct proc *p = td->td_proc; 2028 struct linux_pemuldata *pem; 2029 l_timeval linux_tv; 2030 struct sockaddr *sa; 2031 struct timeval tv; 2032 socklen_t len; 2033 int error, level, name, val; 2034 2035 level = linux_to_bsd_sockopt_level(args->level); 2036 switch (level) { 2037 case SOL_SOCKET: 2038 name = linux_to_bsd_so_sockopt(args->optname); 2039 switch (name) { 2040 case LOCAL_CREDS_PERSISTENT: 2041 level = SOL_LOCAL; 2042 break; 2043 case SO_RCVTIMEO: 2044 /* FALLTHROUGH */ 2045 case SO_SNDTIMEO: 2046 error = copyin(PTRIN(args->optval), &linux_tv, 2047 sizeof(linux_tv)); 2048 if (error != 0) 2049 return (error); 2050 tv.tv_sec = linux_tv.tv_sec; 2051 tv.tv_usec = linux_tv.tv_usec; 2052 return (kern_setsockopt(td, args->s, level, 2053 name, &tv, UIO_SYSSPACE, sizeof(tv))); 2054 /* NOTREACHED */ 2055 case SO_TIMESTAMP: 2056 /* overwrite SO_BINTIME */ 2057 val = 0; 2058 error = kern_setsockopt(td, args->s, level, 2059 SO_BINTIME, &val, UIO_SYSSPACE, sizeof(val)); 2060 if (error != 0) 2061 return (error); 2062 pem = pem_find(p); 2063 pem->so_timestamp = args->optname; 2064 break; 2065 case SO_BINTIME: 2066 /* overwrite SO_TIMESTAMP */ 2067 val = 0; 2068 error = kern_setsockopt(td, args->s, level, 2069 SO_TIMESTAMP, &val, UIO_SYSSPACE, sizeof(val)); 2070 if (error != 0) 2071 return (error); 2072 pem = pem_find(p); 2073 pem->so_timestampns = args->optname; 2074 break; 2075 default: 2076 break; 2077 } 2078 break; 2079 case IPPROTO_IP: 2080 if (args->optname == LINUX_IP_RECVERR && 2081 linux_ignore_ip_recverr) { 2082 /* 2083 * XXX: This is a hack to unbreak DNS resolution 2084 * with glibc 2.30 and above. 2085 */ 2086 return (0); 2087 } 2088 name = linux_to_bsd_ip_sockopt(args->optname); 2089 break; 2090 case IPPROTO_IPV6: 2091 name = linux_to_bsd_ip6_sockopt(args->optname); 2092 break; 2093 case IPPROTO_TCP: 2094 name = linux_to_bsd_tcp_sockopt(args->optname); 2095 break; 2096 case SOL_NETLINK: 2097 level = SOL_SOCKET; 2098 name = args->optname; 2099 break; 2100 default: 2101 name = -1; 2102 break; 2103 } 2104 if (name < 0) { 2105 if (name == -1) 2106 linux_msg(curthread, 2107 "unsupported setsockopt level %d optname %d", 2108 args->level, args->optname); 2109 return (ENOPROTOOPT); 2110 } 2111 2112 if (name == IPV6_NEXTHOP) { 2113 len = args->optlen; 2114 error = linux_to_bsd_sockaddr(PTRIN(args->optval), &sa, &len); 2115 if (error != 0) 2116 return (error); 2117 2118 error = kern_setsockopt(td, args->s, level, 2119 name, sa, UIO_SYSSPACE, len); 2120 free(sa, M_SONAME); 2121 } else { 2122 error = kern_setsockopt(td, args->s, level, 2123 name, PTRIN(args->optval), UIO_USERSPACE, args->optlen); 2124 } 2125 2126 return (error); 2127 } 2128 2129 static int 2130 linux_sockopt_copyout(struct thread *td, void *val, socklen_t len, 2131 struct linux_getsockopt_args *args) 2132 { 2133 int error; 2134 2135 error = copyout(val, PTRIN(args->optval), len); 2136 if (error == 0) 2137 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2138 return (error); 2139 } 2140 2141 static int 2142 linux_getsockopt_so_peergroups(struct thread *td, 2143 struct linux_getsockopt_args *args) 2144 { 2145 struct xucred xu; 2146 socklen_t xulen, len; 2147 int error, i; 2148 2149 xulen = sizeof(xu); 2150 error = kern_getsockopt(td, args->s, 0, 2151 LOCAL_PEERCRED, &xu, UIO_SYSSPACE, &xulen); 2152 if (error != 0) 2153 return (error); 2154 2155 len = xu.cr_ngroups * sizeof(l_gid_t); 2156 if (args->optlen < len) { 2157 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2158 if (error == 0) 2159 error = ERANGE; 2160 return (error); 2161 } 2162 2163 /* 2164 * "- 1" to skip the primary group. 2165 */ 2166 for (i = 0; i < xu.cr_ngroups - 1; i++) { 2167 error = copyout(xu.cr_groups + i + 1, 2168 (void *)(args->optval + i * sizeof(l_gid_t)), 2169 sizeof(l_gid_t)); 2170 if (error != 0) 2171 return (error); 2172 } 2173 2174 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2175 return (error); 2176 } 2177 2178 static int 2179 linux_getsockopt_so_peersec(struct thread *td, 2180 struct linux_getsockopt_args *args) 2181 { 2182 socklen_t len; 2183 int error; 2184 2185 len = sizeof(SECURITY_CONTEXT_STRING); 2186 if (args->optlen < len) { 2187 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2188 if (error == 0) 2189 error = ERANGE; 2190 return (error); 2191 } 2192 2193 return (linux_sockopt_copyout(td, SECURITY_CONTEXT_STRING, 2194 len, args)); 2195 } 2196 2197 static int 2198 linux_getsockopt_so_linger(struct thread *td, 2199 struct linux_getsockopt_args *args) 2200 { 2201 struct linger ling; 2202 socklen_t len; 2203 int error; 2204 2205 len = sizeof(ling); 2206 error = kern_getsockopt(td, args->s, SOL_SOCKET, 2207 SO_LINGER, &ling, UIO_SYSSPACE, &len); 2208 if (error != 0) 2209 return (error); 2210 ling.l_onoff = ((ling.l_onoff & SO_LINGER) != 0); 2211 return (linux_sockopt_copyout(td, &ling, len, args)); 2212 } 2213 2214 int 2215 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 2216 { 2217 l_timeval linux_tv; 2218 struct timeval tv; 2219 socklen_t tv_len, xulen, len; 2220 struct sockaddr *sa; 2221 struct xucred xu; 2222 struct l_ucred lxu; 2223 int error, level, name, newval; 2224 2225 level = linux_to_bsd_sockopt_level(args->level); 2226 switch (level) { 2227 case SOL_SOCKET: 2228 switch (args->optname) { 2229 case LINUX_SO_PEERGROUPS: 2230 return (linux_getsockopt_so_peergroups(td, args)); 2231 case LINUX_SO_PEERSEC: 2232 return (linux_getsockopt_so_peersec(td, args)); 2233 default: 2234 break; 2235 } 2236 2237 name = linux_to_bsd_so_sockopt(args->optname); 2238 switch (name) { 2239 case LOCAL_CREDS_PERSISTENT: 2240 level = SOL_LOCAL; 2241 break; 2242 case SO_RCVTIMEO: 2243 /* FALLTHROUGH */ 2244 case SO_SNDTIMEO: 2245 tv_len = sizeof(tv); 2246 error = kern_getsockopt(td, args->s, level, 2247 name, &tv, UIO_SYSSPACE, &tv_len); 2248 if (error != 0) 2249 return (error); 2250 linux_tv.tv_sec = tv.tv_sec; 2251 linux_tv.tv_usec = tv.tv_usec; 2252 return (linux_sockopt_copyout(td, &linux_tv, 2253 sizeof(linux_tv), args)); 2254 /* NOTREACHED */ 2255 case LOCAL_PEERCRED: 2256 if (args->optlen < sizeof(lxu)) 2257 return (EINVAL); 2258 /* 2259 * LOCAL_PEERCRED is not served at the SOL_SOCKET level, 2260 * but by the Unix socket's level 0. 2261 */ 2262 level = 0; 2263 xulen = sizeof(xu); 2264 error = kern_getsockopt(td, args->s, level, 2265 name, &xu, UIO_SYSSPACE, &xulen); 2266 if (error != 0) 2267 return (error); 2268 lxu.pid = xu.cr_pid; 2269 lxu.uid = xu.cr_uid; 2270 lxu.gid = xu.cr_gid; 2271 return (linux_sockopt_copyout(td, &lxu, 2272 sizeof(lxu), args)); 2273 /* NOTREACHED */ 2274 case SO_ERROR: 2275 len = sizeof(newval); 2276 error = kern_getsockopt(td, args->s, level, 2277 name, &newval, UIO_SYSSPACE, &len); 2278 if (error != 0) 2279 return (error); 2280 newval = -bsd_to_linux_errno(newval); 2281 return (linux_sockopt_copyout(td, &newval, 2282 len, args)); 2283 /* NOTREACHED */ 2284 case SO_DOMAIN: 2285 len = sizeof(newval); 2286 error = kern_getsockopt(td, args->s, level, 2287 name, &newval, UIO_SYSSPACE, &len); 2288 if (error != 0) 2289 return (error); 2290 newval = bsd_to_linux_domain(newval); 2291 if (newval == -1) 2292 return (ENOPROTOOPT); 2293 return (linux_sockopt_copyout(td, &newval, 2294 len, args)); 2295 /* NOTREACHED */ 2296 case SO_LINGER: 2297 return (linux_getsockopt_so_linger(td, args)); 2298 /* NOTREACHED */ 2299 default: 2300 break; 2301 } 2302 break; 2303 case IPPROTO_IP: 2304 name = linux_to_bsd_ip_sockopt(args->optname); 2305 break; 2306 case IPPROTO_IPV6: 2307 name = linux_to_bsd_ip6_sockopt(args->optname); 2308 break; 2309 case IPPROTO_TCP: 2310 name = linux_to_bsd_tcp_sockopt(args->optname); 2311 break; 2312 default: 2313 name = -1; 2314 break; 2315 } 2316 if (name < 0) { 2317 if (name == -1) 2318 linux_msg(curthread, 2319 "unsupported getsockopt level %d optname %d", 2320 args->level, args->optname); 2321 return (EINVAL); 2322 } 2323 2324 if (name == IPV6_NEXTHOP) { 2325 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 2326 if (error != 0) 2327 return (error); 2328 sa = malloc(len, M_SONAME, M_WAITOK); 2329 2330 error = kern_getsockopt(td, args->s, level, 2331 name, sa, UIO_SYSSPACE, &len); 2332 if (error != 0) 2333 goto out; 2334 2335 error = linux_copyout_sockaddr(sa, PTRIN(args->optval), len); 2336 if (error == 0) 2337 error = copyout(&len, PTRIN(args->optlen), 2338 sizeof(len)); 2339 out: 2340 free(sa, M_SONAME); 2341 } else { 2342 if (args->optval) { 2343 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 2344 if (error != 0) 2345 return (error); 2346 } 2347 error = kern_getsockopt(td, args->s, level, 2348 name, PTRIN(args->optval), UIO_USERSPACE, &len); 2349 if (error == 0) 2350 error = copyout(&len, PTRIN(args->optlen), 2351 sizeof(len)); 2352 } 2353 2354 return (error); 2355 } 2356 2357 static int 2358 linux_sendfile_common(struct thread *td, l_int out, l_int in, 2359 l_loff_t *offset, l_size_t count) 2360 { 2361 off_t bytes_read; 2362 int error; 2363 l_loff_t current_offset; 2364 struct file *fp; 2365 2366 AUDIT_ARG_FD(in); 2367 error = fget_read(td, in, &cap_pread_rights, &fp); 2368 if (error != 0) 2369 return (error); 2370 2371 if (offset != NULL) { 2372 current_offset = *offset; 2373 } else { 2374 error = (fp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0 ? 2375 fo_seek(fp, 0, SEEK_CUR, td) : ESPIPE; 2376 if (error != 0) 2377 goto drop; 2378 current_offset = td->td_uretoff.tdu_off; 2379 } 2380 2381 bytes_read = 0; 2382 2383 /* Linux cannot have 0 count. */ 2384 if (count <= 0 || current_offset < 0) { 2385 error = EINVAL; 2386 goto drop; 2387 } 2388 2389 error = fo_sendfile(fp, out, NULL, NULL, current_offset, count, 2390 &bytes_read, 0, td); 2391 if (error != 0) 2392 goto drop; 2393 current_offset += bytes_read; 2394 2395 if (offset != NULL) { 2396 *offset = current_offset; 2397 } else { 2398 error = fo_seek(fp, current_offset, SEEK_SET, td); 2399 if (error != 0) 2400 goto drop; 2401 } 2402 2403 td->td_retval[0] = (ssize_t)bytes_read; 2404 drop: 2405 fdrop(fp, td); 2406 if (error == ENOTSOCK) 2407 error = EINVAL; 2408 return (error); 2409 } 2410 2411 int 2412 linux_sendfile(struct thread *td, struct linux_sendfile_args *arg) 2413 { 2414 /* 2415 * Differences between FreeBSD and Linux sendfile: 2416 * - Linux doesn't send anything when count is 0 (FreeBSD uses 0 to 2417 * mean send the whole file.) In linux_sendfile given fds are still 2418 * checked for validity when the count is 0. 2419 * - Linux can send to any fd whereas FreeBSD only supports sockets. 2420 * The same restriction follows for linux_sendfile. 2421 * - Linux doesn't have an equivalent for FreeBSD's flags and sf_hdtr. 2422 * - Linux takes an offset pointer and updates it to the read location. 2423 * FreeBSD takes in an offset and a 'bytes read' parameter which is 2424 * only filled if it isn't NULL. We use this parameter to update the 2425 * offset pointer if it exists. 2426 * - Linux sendfile returns bytes read on success while FreeBSD 2427 * returns 0. We use the 'bytes read' parameter to get this value. 2428 */ 2429 2430 l_loff_t offset64; 2431 l_long offset; 2432 int ret; 2433 int error; 2434 2435 if (arg->offset != NULL) { 2436 error = copyin(arg->offset, &offset, sizeof(offset)); 2437 if (error != 0) 2438 return (error); 2439 offset64 = (l_loff_t)offset; 2440 } 2441 2442 ret = linux_sendfile_common(td, arg->out, arg->in, 2443 arg->offset != NULL ? &offset64 : NULL, arg->count); 2444 2445 if (arg->offset != NULL) { 2446 #if defined(__i386__) || defined(__arm__) || \ 2447 (defined(__amd64__) && defined(COMPAT_LINUX32)) 2448 if (offset64 > INT32_MAX) 2449 return (EOVERFLOW); 2450 #endif 2451 offset = (l_long)offset64; 2452 error = copyout(&offset, arg->offset, sizeof(offset)); 2453 if (error != 0) 2454 return (error); 2455 } 2456 2457 return (ret); 2458 } 2459 2460 #if defined(__i386__) || defined(__arm__) || \ 2461 (defined(__amd64__) && defined(COMPAT_LINUX32)) 2462 2463 int 2464 linux_sendfile64(struct thread *td, struct linux_sendfile64_args *arg) 2465 { 2466 l_loff_t offset; 2467 int ret; 2468 int error; 2469 2470 if (arg->offset != NULL) { 2471 error = copyin(arg->offset, &offset, sizeof(offset)); 2472 if (error != 0) 2473 return (error); 2474 } 2475 2476 ret = linux_sendfile_common(td, arg->out, arg->in, 2477 arg->offset != NULL ? &offset : NULL, arg->count); 2478 2479 if (arg->offset != NULL) { 2480 error = copyout(&offset, arg->offset, sizeof(offset)); 2481 if (error != 0) 2482 return (error); 2483 } 2484 2485 return (ret); 2486 } 2487 2488 /* Argument list sizes for linux_socketcall */ 2489 static const unsigned char lxs_args_cnt[] = { 2490 0 /* unused*/, 3 /* socket */, 2491 3 /* bind */, 3 /* connect */, 2492 2 /* listen */, 3 /* accept */, 2493 3 /* getsockname */, 3 /* getpeername */, 2494 4 /* socketpair */, 4 /* send */, 2495 4 /* recv */, 6 /* sendto */, 2496 6 /* recvfrom */, 2 /* shutdown */, 2497 5 /* setsockopt */, 5 /* getsockopt */, 2498 3 /* sendmsg */, 3 /* recvmsg */, 2499 4 /* accept4 */, 5 /* recvmmsg */, 2500 4 /* sendmmsg */, 4 /* sendfile */ 2501 }; 2502 #define LINUX_ARGS_CNT (nitems(lxs_args_cnt) - 1) 2503 #define LINUX_ARG_SIZE(x) (lxs_args_cnt[x] * sizeof(l_ulong)) 2504 2505 int 2506 linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 2507 { 2508 l_ulong a[6]; 2509 #if defined(__amd64__) && defined(COMPAT_LINUX32) 2510 register_t l_args[6]; 2511 #endif 2512 void *arg; 2513 int error; 2514 2515 if (args->what < LINUX_SOCKET || args->what > LINUX_ARGS_CNT) 2516 return (EINVAL); 2517 error = copyin(PTRIN(args->args), a, LINUX_ARG_SIZE(args->what)); 2518 if (error != 0) 2519 return (error); 2520 2521 #if defined(__amd64__) && defined(COMPAT_LINUX32) 2522 for (int i = 0; i < lxs_args_cnt[args->what]; ++i) 2523 l_args[i] = a[i]; 2524 arg = l_args; 2525 #else 2526 arg = a; 2527 #endif 2528 switch (args->what) { 2529 case LINUX_SOCKET: 2530 return (linux_socket(td, arg)); 2531 case LINUX_BIND: 2532 return (linux_bind(td, arg)); 2533 case LINUX_CONNECT: 2534 return (linux_connect(td, arg)); 2535 case LINUX_LISTEN: 2536 return (linux_listen(td, arg)); 2537 case LINUX_ACCEPT: 2538 return (linux_accept(td, arg)); 2539 case LINUX_GETSOCKNAME: 2540 return (linux_getsockname(td, arg)); 2541 case LINUX_GETPEERNAME: 2542 return (linux_getpeername(td, arg)); 2543 case LINUX_SOCKETPAIR: 2544 return (linux_socketpair(td, arg)); 2545 case LINUX_SEND: 2546 return (linux_send(td, arg)); 2547 case LINUX_RECV: 2548 return (linux_recv(td, arg)); 2549 case LINUX_SENDTO: 2550 return (linux_sendto(td, arg)); 2551 case LINUX_RECVFROM: 2552 return (linux_recvfrom(td, arg)); 2553 case LINUX_SHUTDOWN: 2554 return (linux_shutdown(td, arg)); 2555 case LINUX_SETSOCKOPT: 2556 return (linux_setsockopt(td, arg)); 2557 case LINUX_GETSOCKOPT: 2558 return (linux_getsockopt(td, arg)); 2559 case LINUX_SENDMSG: 2560 return (linux_sendmsg(td, arg)); 2561 case LINUX_RECVMSG: 2562 return (linux_recvmsg(td, arg)); 2563 case LINUX_ACCEPT4: 2564 return (linux_accept4(td, arg)); 2565 case LINUX_RECVMMSG: 2566 return (linux_recvmmsg(td, arg)); 2567 case LINUX_SENDMMSG: 2568 return (linux_sendmmsg(td, arg)); 2569 case LINUX_SENDFILE: 2570 return (linux_sendfile(td, arg)); 2571 } 2572 2573 linux_msg(td, "socket type %d not implemented", args->what); 2574 return (ENOSYS); 2575 } 2576 #endif /* __i386__ || __arm__ || (__amd64__ && COMPAT_LINUX32) */
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