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_file.h> 80 #include <compat/linux/linux_mib.h> 81 #include <compat/linux/linux_socket.h> 82 #include <compat/linux/linux_timer.h> 83 #include <compat/linux/linux_util.h> 84 85 #define SECURITY_CONTEXT_STRING "unconfined" 86 87 static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *, 88 l_uint); 89 static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *, 90 l_uint, struct msghdr *); 91 static int linux_set_socket_flags(int, int *); 92 93 static int 94 linux_to_bsd_sockopt_level(int level) 95 { 96 97 if (level == LINUX_SOL_SOCKET) 98 return (SOL_SOCKET); 99 /* Remaining values are RFC-defined protocol numbers. */ 100 return (level); 101 } 102 103 static int 104 bsd_to_linux_sockopt_level(int level) 105 { 106 107 if (level == SOL_SOCKET) 108 return (LINUX_SOL_SOCKET); 109 return (level); 110 } 111 112 static int 113 linux_to_bsd_ip_sockopt(int opt) 114 { 115 116 switch (opt) { 117 /* known and translated sockopts */ 118 case LINUX_IP_TOS: 119 return (IP_TOS); 120 case LINUX_IP_TTL: 121 return (IP_TTL); 122 case LINUX_IP_HDRINCL: 123 return (IP_HDRINCL); 124 case LINUX_IP_OPTIONS: 125 return (IP_OPTIONS); 126 case LINUX_IP_RECVOPTS: 127 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVOPTS"); 128 return (IP_RECVOPTS); 129 case LINUX_IP_RETOPTS: 130 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_REETOPTS"); 131 return (IP_RETOPTS); 132 case LINUX_IP_RECVTTL: 133 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVTTL"); 134 return (IP_RECVTTL); 135 case LINUX_IP_RECVTOS: 136 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVTOS"); 137 return (IP_RECVTOS); 138 case LINUX_IP_FREEBIND: 139 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_FREEBIND"); 140 return (IP_BINDANY); 141 case LINUX_IP_IPSEC_POLICY: 142 /* we have this option, but not documented in ip(4) manpage */ 143 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_IPSEC_POLICY"); 144 return (IP_IPSEC_POLICY); 145 case LINUX_IP_MINTTL: 146 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MINTTL"); 147 return (IP_MINTTL); 148 case LINUX_IP_MULTICAST_IF: 149 return (IP_MULTICAST_IF); 150 case LINUX_IP_MULTICAST_TTL: 151 return (IP_MULTICAST_TTL); 152 case LINUX_IP_MULTICAST_LOOP: 153 return (IP_MULTICAST_LOOP); 154 case LINUX_IP_ADD_MEMBERSHIP: 155 return (IP_ADD_MEMBERSHIP); 156 case LINUX_IP_DROP_MEMBERSHIP: 157 return (IP_DROP_MEMBERSHIP); 158 case LINUX_IP_UNBLOCK_SOURCE: 159 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_UNBLOCK_SOURCE"); 160 return (IP_UNBLOCK_SOURCE); 161 case LINUX_IP_BLOCK_SOURCE: 162 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_BLOCK_SOURCE"); 163 return (IP_BLOCK_SOURCE); 164 case LINUX_IP_ADD_SOURCE_MEMBERSHIP: 165 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_ADD_SOURCE_MEMBERSHIP"); 166 return (IP_ADD_SOURCE_MEMBERSHIP); 167 case LINUX_IP_DROP_SOURCE_MEMBERSHIP: 168 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_DROP_SOURCE_MEMBERSHIP"); 169 return (IP_DROP_SOURCE_MEMBERSHIP); 170 case LINUX_MCAST_JOIN_GROUP: 171 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_JOIN_GROUP"); 172 return (MCAST_JOIN_GROUP); 173 case LINUX_MCAST_LEAVE_GROUP: 174 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_LEAVE_GROUP"); 175 return (MCAST_LEAVE_GROUP); 176 case LINUX_MCAST_JOIN_SOURCE_GROUP: 177 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_JOIN_SOURCE_GROUP"); 178 return (MCAST_JOIN_SOURCE_GROUP); 179 case LINUX_MCAST_LEAVE_SOURCE_GROUP: 180 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_LEAVE_SOURCE_GROUP"); 181 return (MCAST_LEAVE_SOURCE_GROUP); 182 183 /* known but not implemented sockopts */ 184 case LINUX_IP_ROUTER_ALERT: 185 LINUX_RATELIMIT_MSG_OPT1( 186 "unsupported IPv4 socket option IP_ROUTER_ALERT (%d), you can not do user-space routing from linux programs", 187 opt); 188 return (-2); 189 case LINUX_IP_PKTINFO: 190 LINUX_RATELIMIT_MSG_OPT1( 191 "unsupported IPv4 socket option IP_PKTINFO (%d), you can not get extended packet info for datagram sockets in linux programs", 192 opt); 193 return (-2); 194 case LINUX_IP_PKTOPTIONS: 195 LINUX_RATELIMIT_MSG_OPT1( 196 "unsupported IPv4 socket option IP_PKTOPTIONS (%d)", 197 opt); 198 return (-2); 199 case LINUX_IP_MTU_DISCOVER: 200 LINUX_RATELIMIT_MSG_OPT1( 201 "unsupported IPv4 socket option IP_MTU_DISCOVER (%d), your linux program can not control path-MTU discovery", 202 opt); 203 return (-2); 204 case LINUX_IP_RECVERR: 205 /* needed by steam */ 206 LINUX_RATELIMIT_MSG_OPT1( 207 "unsupported IPv4 socket option IP_RECVERR (%d), you can not get extended reliability info in linux programs", 208 opt); 209 return (-2); 210 case LINUX_IP_MTU: 211 LINUX_RATELIMIT_MSG_OPT1( 212 "unsupported IPv4 socket option IP_MTU (%d), your linux program can not control the MTU on this socket", 213 opt); 214 return (-2); 215 case LINUX_IP_XFRM_POLICY: 216 LINUX_RATELIMIT_MSG_OPT1( 217 "unsupported IPv4 socket option IP_XFRM_POLICY (%d)", 218 opt); 219 return (-2); 220 case LINUX_IP_PASSSEC: 221 /* needed by steam */ 222 LINUX_RATELIMIT_MSG_OPT1( 223 "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", 224 opt); 225 return (-2); 226 case LINUX_IP_TRANSPARENT: 227 /* IP_BINDANY or more? */ 228 LINUX_RATELIMIT_MSG_OPT1( 229 "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", 230 opt); 231 return (-2); 232 case LINUX_IP_NODEFRAG: 233 LINUX_RATELIMIT_MSG_OPT1( 234 "unsupported IPv4 socket option IP_NODEFRAG (%d)", 235 opt); 236 return (-2); 237 case LINUX_IP_CHECKSUM: 238 LINUX_RATELIMIT_MSG_OPT1( 239 "unsupported IPv4 socket option IP_CHECKSUM (%d)", 240 opt); 241 return (-2); 242 case LINUX_IP_BIND_ADDRESS_NO_PORT: 243 LINUX_RATELIMIT_MSG_OPT1( 244 "unsupported IPv4 socket option IP_BIND_ADDRESS_NO_PORT (%d)", 245 opt); 246 return (-2); 247 case LINUX_IP_RECVFRAGSIZE: 248 LINUX_RATELIMIT_MSG_OPT1( 249 "unsupported IPv4 socket option IP_RECVFRAGSIZE (%d)", 250 opt); 251 return (-2); 252 case LINUX_MCAST_MSFILTER: 253 LINUX_RATELIMIT_MSG_OPT1( 254 "unsupported IPv4 socket option IP_MCAST_MSFILTER (%d)", 255 opt); 256 return (-2); 257 case LINUX_IP_MULTICAST_ALL: 258 LINUX_RATELIMIT_MSG_OPT1( 259 "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", 260 opt); 261 return (-2); 262 case LINUX_IP_UNICAST_IF: 263 LINUX_RATELIMIT_MSG_OPT1( 264 "unsupported IPv4 socket option IP_UNICAST_IF (%d)", 265 opt); 266 return (-2); 267 268 /* unknown sockopts */ 269 default: 270 return (-1); 271 } 272 } 273 274 static int 275 linux_to_bsd_ip6_sockopt(int opt) 276 { 277 278 switch (opt) { 279 /* known and translated sockopts */ 280 case LINUX_IPV6_2292PKTINFO: 281 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292PKTINFO"); 282 return (IPV6_2292PKTINFO); 283 case LINUX_IPV6_2292HOPOPTS: 284 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292HOPOPTS"); 285 return (IPV6_2292HOPOPTS); 286 case LINUX_IPV6_2292DSTOPTS: 287 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292DSTOPTS"); 288 return (IPV6_2292DSTOPTS); 289 case LINUX_IPV6_2292RTHDR: 290 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292RTHDR"); 291 return (IPV6_2292RTHDR); 292 case LINUX_IPV6_2292PKTOPTIONS: 293 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292PKTOPTIONS"); 294 return (IPV6_2292PKTOPTIONS); 295 case LINUX_IPV6_CHECKSUM: 296 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_CHECKSUM"); 297 return (IPV6_CHECKSUM); 298 case LINUX_IPV6_2292HOPLIMIT: 299 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292HOPLIMIT"); 300 return (IPV6_2292HOPLIMIT); 301 case LINUX_IPV6_NEXTHOP: 302 return (IPV6_NEXTHOP); 303 case LINUX_IPV6_UNICAST_HOPS: 304 return (IPV6_UNICAST_HOPS); 305 case LINUX_IPV6_MULTICAST_IF: 306 return (IPV6_MULTICAST_IF); 307 case LINUX_IPV6_MULTICAST_HOPS: 308 return (IPV6_MULTICAST_HOPS); 309 case LINUX_IPV6_MULTICAST_LOOP: 310 return (IPV6_MULTICAST_LOOP); 311 case LINUX_IPV6_ADD_MEMBERSHIP: 312 return (IPV6_JOIN_GROUP); 313 case LINUX_IPV6_DROP_MEMBERSHIP: 314 return (IPV6_LEAVE_GROUP); 315 case LINUX_IPV6_V6ONLY: 316 return (IPV6_V6ONLY); 317 case LINUX_IPV6_IPSEC_POLICY: 318 /* we have this option, but not documented in ip6(4) manpage */ 319 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_IPSEC_POLICY"); 320 return (IPV6_IPSEC_POLICY); 321 case LINUX_MCAST_JOIN_GROUP: 322 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_JOIN_GROUP"); 323 return (IPV6_JOIN_GROUP); 324 case LINUX_MCAST_LEAVE_GROUP: 325 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_LEAVE_GROUP"); 326 return (IPV6_LEAVE_GROUP); 327 case LINUX_IPV6_RECVPKTINFO: 328 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVPKTINFO"); 329 return (IPV6_RECVPKTINFO); 330 case LINUX_IPV6_PKTINFO: 331 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_PKTINFO"); 332 return (IPV6_PKTINFO); 333 case LINUX_IPV6_RECVHOPLIMIT: 334 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVHOPLIMIT"); 335 return (IPV6_RECVHOPLIMIT); 336 case LINUX_IPV6_HOPLIMIT: 337 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_HOPLIMIT"); 338 return (IPV6_HOPLIMIT); 339 case LINUX_IPV6_RECVHOPOPTS: 340 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVHOPOPTS"); 341 return (IPV6_RECVHOPOPTS); 342 case LINUX_IPV6_HOPOPTS: 343 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_HOPOPTS"); 344 return (IPV6_HOPOPTS); 345 case LINUX_IPV6_RTHDRDSTOPTS: 346 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RTHDRDSTOPTS"); 347 return (IPV6_RTHDRDSTOPTS); 348 case LINUX_IPV6_RECVRTHDR: 349 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVRTHDR"); 350 return (IPV6_RECVRTHDR); 351 case LINUX_IPV6_RTHDR: 352 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RTHDR"); 353 return (IPV6_RTHDR); 354 case LINUX_IPV6_RECVDSTOPTS: 355 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVDSTOPTS"); 356 return (IPV6_RECVDSTOPTS); 357 case LINUX_IPV6_DSTOPTS: 358 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_DSTOPTS"); 359 return (IPV6_DSTOPTS); 360 case LINUX_IPV6_RECVPATHMTU: 361 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVPATHMTU"); 362 return (IPV6_RECVPATHMTU); 363 case LINUX_IPV6_PATHMTU: 364 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_PATHMTU"); 365 return (IPV6_PATHMTU); 366 case LINUX_IPV6_DONTFRAG: 367 return (IPV6_DONTFRAG); 368 case LINUX_IPV6_AUTOFLOWLABEL: 369 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_AUTOFLOWLABEL"); 370 return (IPV6_AUTOFLOWLABEL); 371 case LINUX_IPV6_ORIGDSTADDR: 372 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_ORIGDSTADDR"); 373 return (IPV6_ORIGDSTADDR); 374 case LINUX_IPV6_FREEBIND: 375 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_FREEBIND"); 376 return (IPV6_BINDANY); 377 378 /* known but not implemented sockopts */ 379 case LINUX_IPV6_ADDRFORM: 380 LINUX_RATELIMIT_MSG_OPT1( 381 "unsupported IPv6 socket option IPV6_ADDRFORM (%d), you linux program can not convert the socket to IPv4", 382 opt); 383 return (-2); 384 case LINUX_IPV6_AUTHHDR: 385 LINUX_RATELIMIT_MSG_OPT1( 386 "unsupported IPv6 socket option IPV6_AUTHHDR (%d), your linux program can not get the authentication header info of IPv6 packets", 387 opt); 388 return (-2); 389 case LINUX_IPV6_FLOWINFO: 390 LINUX_RATELIMIT_MSG_OPT1( 391 "unsupported IPv6 socket option IPV6_FLOWINFO (%d), your linux program can not get the flowid of IPv6 packets", 392 opt); 393 return (-2); 394 case LINUX_IPV6_ROUTER_ALERT: 395 LINUX_RATELIMIT_MSG_OPT1( 396 "unsupported IPv6 socket option IPV6_ROUTER_ALERT (%d), you can not do user-space routing from linux programs", 397 opt); 398 return (-2); 399 case LINUX_IPV6_MTU_DISCOVER: 400 LINUX_RATELIMIT_MSG_OPT1( 401 "unsupported IPv6 socket option IPV6_MTU_DISCOVER (%d), your linux program can not control path-MTU discovery", 402 opt); 403 return (-2); 404 case LINUX_IPV6_MTU: 405 LINUX_RATELIMIT_MSG_OPT1( 406 "unsupported IPv6 socket option IPV6_MTU (%d), your linux program can not control the MTU on this socket", 407 opt); 408 return (-2); 409 case LINUX_IPV6_JOIN_ANYCAST: 410 LINUX_RATELIMIT_MSG_OPT1( 411 "unsupported IPv6 socket option IPV6_JOIN_ANYCAST (%d)", 412 opt); 413 return (-2); 414 case LINUX_IPV6_LEAVE_ANYCAST: 415 LINUX_RATELIMIT_MSG_OPT1( 416 "unsupported IPv6 socket option IPV6_LEAVE_ANYCAST (%d)", 417 opt); 418 return (-2); 419 case LINUX_IPV6_MULTICAST_ALL: 420 LINUX_RATELIMIT_MSG_OPT1( 421 "unsupported IPv6 socket option IPV6_MULTICAST_ALL (%d)", 422 opt); 423 return (-2); 424 case LINUX_IPV6_ROUTER_ALERT_ISOLATE: 425 LINUX_RATELIMIT_MSG_OPT1( 426 "unsupported IPv6 socket option IPV6_ROUTER_ALERT_ISOLATE (%d)", 427 opt); 428 return (-2); 429 case LINUX_IPV6_FLOWLABEL_MGR: 430 LINUX_RATELIMIT_MSG_OPT1( 431 "unsupported IPv6 socket option IPV6_FLOWLABEL_MGR (%d)", 432 opt); 433 return (-2); 434 case LINUX_IPV6_FLOWINFO_SEND: 435 LINUX_RATELIMIT_MSG_OPT1( 436 "unsupported IPv6 socket option IPV6_FLOWINFO_SEND (%d)", 437 opt); 438 return (-2); 439 case LINUX_IPV6_XFRM_POLICY: 440 LINUX_RATELIMIT_MSG_OPT1( 441 "unsupported IPv6 socket option IPV6_XFRM_POLICY (%d)", 442 opt); 443 return (-2); 444 case LINUX_IPV6_HDRINCL: 445 LINUX_RATELIMIT_MSG_OPT1( 446 "unsupported IPv6 socket option IPV6_HDRINCL (%d)", 447 opt); 448 return (-2); 449 case LINUX_MCAST_BLOCK_SOURCE: 450 LINUX_RATELIMIT_MSG_OPT1( 451 "unsupported IPv6 socket option MCAST_BLOCK_SOURCE (%d), your linux program may see more multicast stuff than it wants", 452 opt); 453 return (-2); 454 case LINUX_MCAST_UNBLOCK_SOURCE: 455 LINUX_RATELIMIT_MSG_OPT1( 456 "unsupported IPv6 socket option MCAST_UNBLOCK_SOURCE (%d), your linux program may not see all the multicast stuff it wants", 457 opt); 458 return (-2); 459 case LINUX_MCAST_JOIN_SOURCE_GROUP: 460 LINUX_RATELIMIT_MSG_OPT1( 461 "unsupported IPv6 socket option MCAST_JOIN_SOURCE_GROUP (%d), your linux program is not able to join a multicast source group", 462 opt); 463 return (-2); 464 case LINUX_MCAST_LEAVE_SOURCE_GROUP: 465 LINUX_RATELIMIT_MSG_OPT1( 466 "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", 467 opt); 468 return (-2); 469 case LINUX_MCAST_MSFILTER: 470 LINUX_RATELIMIT_MSG_OPT1( 471 "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", 472 opt); 473 return (-2); 474 case LINUX_IPV6_ADDR_PREFERENCES: 475 LINUX_RATELIMIT_MSG_OPT1( 476 "unsupported IPv6 socket option IPV6_ADDR_PREFERENCES (%d)", 477 opt); 478 return (-2); 479 case LINUX_IPV6_MINHOPCOUNT: 480 LINUX_RATELIMIT_MSG_OPT1( 481 "unsupported IPv6 socket option IPV6_MINHOPCOUNT (%d)", 482 opt); 483 return (-2); 484 case LINUX_IPV6_TRANSPARENT: 485 /* IP_BINDANY or more? */ 486 LINUX_RATELIMIT_MSG_OPT1( 487 "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", 488 opt); 489 return (-2); 490 case LINUX_IPV6_UNICAST_IF: 491 LINUX_RATELIMIT_MSG_OPT1( 492 "unsupported IPv6 socket option IPV6_UNICAST_IF (%d)", 493 opt); 494 return (-2); 495 case LINUX_IPV6_RECVFRAGSIZE: 496 LINUX_RATELIMIT_MSG_OPT1( 497 "unsupported IPv6 socket option IPV6_RECVFRAGSIZE (%d)", 498 opt); 499 return (-2); 500 501 /* unknown sockopts */ 502 default: 503 return (-1); 504 } 505 } 506 507 static int 508 linux_to_bsd_so_sockopt(int opt) 509 { 510 511 switch (opt) { 512 case LINUX_SO_DEBUG: 513 return (SO_DEBUG); 514 case LINUX_SO_REUSEADDR: 515 return (SO_REUSEADDR); 516 case LINUX_SO_TYPE: 517 return (SO_TYPE); 518 case LINUX_SO_ERROR: 519 return (SO_ERROR); 520 case LINUX_SO_DONTROUTE: 521 return (SO_DONTROUTE); 522 case LINUX_SO_BROADCAST: 523 return (SO_BROADCAST); 524 case LINUX_SO_SNDBUF: 525 case LINUX_SO_SNDBUFFORCE: 526 return (SO_SNDBUF); 527 case LINUX_SO_RCVBUF: 528 case LINUX_SO_RCVBUFFORCE: 529 return (SO_RCVBUF); 530 case LINUX_SO_KEEPALIVE: 531 return (SO_KEEPALIVE); 532 case LINUX_SO_OOBINLINE: 533 return (SO_OOBINLINE); 534 case LINUX_SO_LINGER: 535 return (SO_LINGER); 536 case LINUX_SO_REUSEPORT: 537 return (SO_REUSEPORT_LB); 538 case LINUX_SO_PASSCRED: 539 return (LOCAL_CREDS_PERSISTENT); 540 case LINUX_SO_PEERCRED: 541 return (LOCAL_PEERCRED); 542 case LINUX_SO_RCVLOWAT: 543 return (SO_RCVLOWAT); 544 case LINUX_SO_SNDLOWAT: 545 return (SO_SNDLOWAT); 546 case LINUX_SO_RCVTIMEO: 547 return (SO_RCVTIMEO); 548 case LINUX_SO_SNDTIMEO: 549 return (SO_SNDTIMEO); 550 case LINUX_SO_TIMESTAMP: 551 return (SO_TIMESTAMP); 552 case LINUX_SO_ACCEPTCONN: 553 return (SO_ACCEPTCONN); 554 case LINUX_SO_PROTOCOL: 555 return (SO_PROTOCOL); 556 } 557 return (-1); 558 } 559 560 static int 561 linux_to_bsd_tcp_sockopt(int opt) 562 { 563 564 switch (opt) { 565 case LINUX_TCP_NODELAY: 566 return (TCP_NODELAY); 567 case LINUX_TCP_MAXSEG: 568 return (TCP_MAXSEG); 569 case LINUX_TCP_CORK: 570 return (TCP_NOPUSH); 571 case LINUX_TCP_KEEPIDLE: 572 return (TCP_KEEPIDLE); 573 case LINUX_TCP_KEEPINTVL: 574 return (TCP_KEEPINTVL); 575 case LINUX_TCP_KEEPCNT: 576 return (TCP_KEEPCNT); 577 case LINUX_TCP_MD5SIG: 578 return (TCP_MD5SIG); 579 } 580 return (-1); 581 } 582 583 static int 584 linux_to_bsd_msg_flags(int flags) 585 { 586 int ret_flags = 0; 587 588 if (flags & LINUX_MSG_OOB) 589 ret_flags |= MSG_OOB; 590 if (flags & LINUX_MSG_PEEK) 591 ret_flags |= MSG_PEEK; 592 if (flags & LINUX_MSG_DONTROUTE) 593 ret_flags |= MSG_DONTROUTE; 594 if (flags & LINUX_MSG_CTRUNC) 595 ret_flags |= MSG_CTRUNC; 596 if (flags & LINUX_MSG_TRUNC) 597 ret_flags |= MSG_TRUNC; 598 if (flags & LINUX_MSG_DONTWAIT) 599 ret_flags |= MSG_DONTWAIT; 600 if (flags & LINUX_MSG_EOR) 601 ret_flags |= MSG_EOR; 602 if (flags & LINUX_MSG_WAITALL) 603 ret_flags |= MSG_WAITALL; 604 if (flags & LINUX_MSG_NOSIGNAL) 605 ret_flags |= MSG_NOSIGNAL; 606 if (flags & LINUX_MSG_PROXY) 607 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_PROXY (%d) not handled", 608 LINUX_MSG_PROXY); 609 if (flags & LINUX_MSG_FIN) 610 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_FIN (%d) not handled", 611 LINUX_MSG_FIN); 612 if (flags & LINUX_MSG_SYN) 613 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_SYN (%d) not handled", 614 LINUX_MSG_SYN); 615 if (flags & LINUX_MSG_CONFIRM) 616 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_CONFIRM (%d) not handled", 617 LINUX_MSG_CONFIRM); 618 if (flags & LINUX_MSG_RST) 619 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_RST (%d) not handled", 620 LINUX_MSG_RST); 621 if (flags & LINUX_MSG_ERRQUEUE) 622 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_ERRQUEUE (%d) not handled", 623 LINUX_MSG_ERRQUEUE); 624 return (ret_flags); 625 } 626 627 static int 628 linux_to_bsd_cmsg_type(int cmsg_type) 629 { 630 631 switch (cmsg_type) { 632 case LINUX_SCM_RIGHTS: 633 return (SCM_RIGHTS); 634 case LINUX_SCM_CREDENTIALS: 635 return (SCM_CREDS); 636 } 637 return (-1); 638 } 639 640 static int 641 bsd_to_linux_cmsg_type(int cmsg_type) 642 { 643 644 switch (cmsg_type) { 645 case SCM_RIGHTS: 646 return (LINUX_SCM_RIGHTS); 647 case SCM_CREDS: 648 return (LINUX_SCM_CREDENTIALS); 649 case SCM_CREDS2: 650 return (LINUX_SCM_CREDENTIALS); 651 case SCM_TIMESTAMP: 652 return (LINUX_SCM_TIMESTAMP); 653 } 654 return (-1); 655 } 656 657 static int 658 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 659 { 660 if (lhdr->msg_controllen > INT_MAX) 661 return (ENOBUFS); 662 663 bhdr->msg_name = PTRIN(lhdr->msg_name); 664 bhdr->msg_namelen = lhdr->msg_namelen; 665 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 666 bhdr->msg_iovlen = lhdr->msg_iovlen; 667 bhdr->msg_control = PTRIN(lhdr->msg_control); 668 669 /* 670 * msg_controllen is skipped since BSD and LINUX control messages 671 * are potentially different sizes (e.g. the cred structure used 672 * by SCM_CREDS is different between the two operating system). 673 * 674 * The caller can set it (if necessary) after converting all the 675 * control messages. 676 */ 677 678 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 679 return (0); 680 } 681 682 static int 683 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 684 { 685 lhdr->msg_name = PTROUT(bhdr->msg_name); 686 lhdr->msg_namelen = bhdr->msg_namelen; 687 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 688 lhdr->msg_iovlen = bhdr->msg_iovlen; 689 lhdr->msg_control = PTROUT(bhdr->msg_control); 690 691 /* 692 * msg_controllen is skipped since BSD and LINUX control messages 693 * are potentially different sizes (e.g. the cred structure used 694 * by SCM_CREDS is different between the two operating system). 695 * 696 * The caller can set it (if necessary) after converting all the 697 * control messages. 698 */ 699 700 /* msg_flags skipped */ 701 return (0); 702 } 703 704 static int 705 linux_set_socket_flags(int lflags, int *flags) 706 { 707 708 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 709 return (EINVAL); 710 if (lflags & LINUX_SOCK_NONBLOCK) 711 *flags |= SOCK_NONBLOCK; 712 if (lflags & LINUX_SOCK_CLOEXEC) 713 *flags |= SOCK_CLOEXEC; 714 return (0); 715 } 716 717 static int 718 linux_copyout_sockaddr(const struct sockaddr *sa, void *uaddr, size_t len) 719 { 720 struct l_sockaddr *lsa; 721 int error; 722 723 error = bsd_to_linux_sockaddr(sa, &lsa, len); 724 if (error != 0) 725 return (error); 726 727 error = copyout(lsa, uaddr, len); 728 free(lsa, M_SONAME); 729 730 return (error); 731 } 732 733 static int 734 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 735 struct mbuf *control, enum uio_seg segflg) 736 { 737 struct sockaddr *to; 738 int error, len; 739 740 if (mp->msg_name != NULL) { 741 len = mp->msg_namelen; 742 error = linux_to_bsd_sockaddr(mp->msg_name, &to, &len); 743 if (error != 0) 744 return (error); 745 mp->msg_name = to; 746 } else 747 to = NULL; 748 749 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 750 segflg); 751 752 if (to) 753 free(to, M_SONAME); 754 return (error); 755 } 756 757 /* Return 0 if IP_HDRINCL is set for the given socket. */ 758 static int 759 linux_check_hdrincl(struct thread *td, int s) 760 { 761 int error, optval; 762 socklen_t size_val; 763 764 size_val = sizeof(optval); 765 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 766 &optval, UIO_SYSSPACE, &size_val); 767 if (error != 0) 768 return (error); 769 770 return (optval == 0); 771 } 772 773 /* 774 * Updated sendto() when IP_HDRINCL is set: 775 * tweak endian-dependent fields in the IP packet. 776 */ 777 static int 778 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 779 { 780 /* 781 * linux_ip_copysize defines how many bytes we should copy 782 * from the beginning of the IP packet before we customize it for BSD. 783 * It should include all the fields we modify (ip_len and ip_off). 784 */ 785 #define linux_ip_copysize 8 786 787 struct ip *packet; 788 struct msghdr msg; 789 struct iovec aiov[1]; 790 int error; 791 792 /* Check that the packet isn't too big or too small. */ 793 if (linux_args->len < linux_ip_copysize || 794 linux_args->len > IP_MAXPACKET) 795 return (EINVAL); 796 797 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK); 798 799 /* Make kernel copy of the packet to be sent */ 800 if ((error = copyin(PTRIN(linux_args->msg), packet, 801 linux_args->len))) 802 goto goout; 803 804 /* Convert fields from Linux to BSD raw IP socket format */ 805 packet->ip_len = linux_args->len; 806 packet->ip_off = ntohs(packet->ip_off); 807 808 /* Prepare the msghdr and iovec structures describing the new packet */ 809 msg.msg_name = PTRIN(linux_args->to); 810 msg.msg_namelen = linux_args->tolen; 811 msg.msg_iov = aiov; 812 msg.msg_iovlen = 1; 813 msg.msg_control = NULL; 814 msg.msg_flags = 0; 815 aiov[0].iov_base = (char *)packet; 816 aiov[0].iov_len = linux_args->len; 817 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 818 NULL, UIO_SYSSPACE); 819 goout: 820 free(packet, M_LINUX); 821 return (error); 822 } 823 824 static const char *linux_netlink_names[] = { 825 [LINUX_NETLINK_ROUTE] = "ROUTE", 826 [LINUX_NETLINK_SOCK_DIAG] = "SOCK_DIAG", 827 [LINUX_NETLINK_NFLOG] = "NFLOG", 828 [LINUX_NETLINK_SELINUX] = "SELINUX", 829 [LINUX_NETLINK_AUDIT] = "AUDIT", 830 [LINUX_NETLINK_FIB_LOOKUP] = "FIB_LOOKUP", 831 [LINUX_NETLINK_NETFILTER] = "NETFILTER", 832 [LINUX_NETLINK_KOBJECT_UEVENT] = "KOBJECT_UEVENT", 833 }; 834 835 int 836 linux_socket(struct thread *td, struct linux_socket_args *args) 837 { 838 int domain, retval_socket, type; 839 840 type = args->type & LINUX_SOCK_TYPE_MASK; 841 if (type < 0 || type > LINUX_SOCK_MAX) 842 return (EINVAL); 843 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 844 &type); 845 if (retval_socket != 0) 846 return (retval_socket); 847 domain = linux_to_bsd_domain(args->domain); 848 if (domain == -1) { 849 /* Mask off SOCK_NONBLOCK / CLOEXEC for error messages. */ 850 type = args->type & LINUX_SOCK_TYPE_MASK; 851 if (args->domain == LINUX_AF_NETLINK && 852 args->protocol == LINUX_NETLINK_AUDIT) { 853 ; /* Do nothing, quietly. */ 854 } else if (args->domain == LINUX_AF_NETLINK) { 855 const char *nl_name; 856 857 if (args->protocol >= 0 && 858 args->protocol < nitems(linux_netlink_names)) 859 nl_name = linux_netlink_names[args->protocol]; 860 else 861 nl_name = NULL; 862 if (nl_name != NULL) 863 linux_msg(curthread, 864 "unsupported socket(AF_NETLINK, %d, " 865 "NETLINK_%s)", type, nl_name); 866 else 867 linux_msg(curthread, 868 "unsupported socket(AF_NETLINK, %d, %d)", 869 type, args->protocol); 870 } else { 871 linux_msg(curthread, "unsupported socket domain %d, " 872 "type %d, protocol %d", args->domain, type, 873 args->protocol); 874 } 875 return (EAFNOSUPPORT); 876 } 877 878 retval_socket = kern_socket(td, domain, type, args->protocol); 879 if (retval_socket) 880 return (retval_socket); 881 882 if (type == SOCK_RAW 883 && (args->protocol == IPPROTO_RAW || args->protocol == 0) 884 && domain == PF_INET) { 885 /* It's a raw IP socket: set the IP_HDRINCL option. */ 886 int hdrincl; 887 888 hdrincl = 1; 889 /* We ignore any error returned by kern_setsockopt() */ 890 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 891 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 892 } 893 #ifdef INET6 894 /* 895 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 896 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 897 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 898 * sysctl value. 899 */ 900 if (domain == PF_INET6) { 901 int v6only; 902 903 v6only = 0; 904 /* We ignore any error returned by setsockopt() */ 905 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 906 &v6only, UIO_SYSSPACE, sizeof(v6only)); 907 } 908 #endif 909 910 return (retval_socket); 911 } 912 913 int 914 linux_bind(struct thread *td, struct linux_bind_args *args) 915 { 916 struct sockaddr *sa; 917 int error; 918 919 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, 920 &args->namelen); 921 if (error != 0) 922 return (error); 923 924 error = kern_bindat(td, AT_FDCWD, args->s, sa); 925 free(sa, M_SONAME); 926 927 /* XXX */ 928 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 929 return (EINVAL); 930 return (error); 931 } 932 933 int 934 linux_connect(struct thread *td, struct linux_connect_args *args) 935 { 936 struct socket *so; 937 struct sockaddr *sa; 938 struct file *fp; 939 u_int fflag; 940 int error; 941 942 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, 943 &args->namelen); 944 if (error != 0) 945 return (error); 946 947 error = kern_connectat(td, AT_FDCWD, args->s, sa); 948 free(sa, M_SONAME); 949 if (error != EISCONN) 950 return (error); 951 952 /* 953 * Linux doesn't return EISCONN the first time it occurs, 954 * when on a non-blocking socket. Instead it returns the 955 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 956 */ 957 error = getsock_cap(td, args->s, &cap_connect_rights, 958 &fp, &fflag, NULL); 959 if (error != 0) 960 return (error); 961 962 error = EISCONN; 963 so = fp->f_data; 964 if (fflag & FNONBLOCK) { 965 SOCK_LOCK(so); 966 if (so->so_emuldata == 0) 967 error = so->so_error; 968 so->so_emuldata = (void *)1; 969 SOCK_UNLOCK(so); 970 } 971 fdrop(fp, td); 972 973 return (error); 974 } 975 976 int 977 linux_listen(struct thread *td, struct linux_listen_args *args) 978 { 979 980 return (kern_listen(td, args->s, args->backlog)); 981 } 982 983 static int 984 linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 985 l_uintptr_t namelen, int flags) 986 { 987 struct sockaddr *sa; 988 struct file *fp, *fp1; 989 int bflags, len; 990 struct socket *so; 991 int error, error1; 992 993 bflags = 0; 994 fp = NULL; 995 sa = NULL; 996 997 error = linux_set_socket_flags(flags, &bflags); 998 if (error != 0) 999 return (error); 1000 1001 if (PTRIN(addr) == NULL) { 1002 len = 0; 1003 error = kern_accept4(td, s, NULL, NULL, bflags, NULL); 1004 } else { 1005 error = copyin(PTRIN(namelen), &len, sizeof(len)); 1006 if (error != 0) 1007 return (error); 1008 if (len < 0) 1009 return (EINVAL); 1010 error = kern_accept4(td, s, &sa, &len, bflags, &fp); 1011 } 1012 1013 /* 1014 * Translate errno values into ones used by Linux. 1015 */ 1016 if (error != 0) { 1017 /* 1018 * XXX. This is wrong, different sockaddr structures 1019 * have different sizes. 1020 */ 1021 switch (error) { 1022 case EFAULT: 1023 if (namelen != sizeof(struct sockaddr_in)) 1024 error = EINVAL; 1025 break; 1026 case EINVAL: 1027 error1 = getsock_cap(td, s, &cap_accept_rights, &fp1, NULL, NULL); 1028 if (error1 != 0) { 1029 error = error1; 1030 break; 1031 } 1032 so = fp1->f_data; 1033 if (so->so_type == SOCK_DGRAM) 1034 error = EOPNOTSUPP; 1035 fdrop(fp1, td); 1036 break; 1037 } 1038 return (error); 1039 } 1040 1041 if (len != 0) { 1042 error = linux_copyout_sockaddr(sa, PTRIN(addr), len); 1043 1044 /* 1045 * XXX: We should also copyout the len, shouldn't we? 1046 */ 1047 1048 if (error != 0) { 1049 fdclose(td, fp, td->td_retval[0]); 1050 td->td_retval[0] = 0; 1051 } 1052 } 1053 if (fp != NULL) 1054 fdrop(fp, td); 1055 free(sa, M_SONAME); 1056 return (error); 1057 } 1058 1059 int 1060 linux_accept(struct thread *td, struct linux_accept_args *args) 1061 { 1062 1063 return (linux_accept_common(td, args->s, args->addr, 1064 args->namelen, 0)); 1065 } 1066 1067 int 1068 linux_accept4(struct thread *td, struct linux_accept4_args *args) 1069 { 1070 1071 return (linux_accept_common(td, args->s, args->addr, 1072 args->namelen, args->flags)); 1073 } 1074 1075 int 1076 linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 1077 { 1078 struct sockaddr *sa; 1079 int len, error; 1080 1081 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 1082 if (error != 0) 1083 return (error); 1084 1085 error = kern_getsockname(td, args->s, &sa, &len); 1086 if (error != 0) 1087 return (error); 1088 1089 if (len != 0) 1090 error = linux_copyout_sockaddr(sa, PTRIN(args->addr), len); 1091 1092 free(sa, M_SONAME); 1093 if (error == 0) 1094 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 1095 return (error); 1096 } 1097 1098 int 1099 linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 1100 { 1101 struct sockaddr *sa; 1102 int len, error; 1103 1104 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 1105 if (error != 0) 1106 return (error); 1107 if (len < 0) 1108 return (EINVAL); 1109 1110 error = kern_getpeername(td, args->s, &sa, &len); 1111 if (error != 0) 1112 return (error); 1113 1114 if (len != 0) 1115 error = linux_copyout_sockaddr(sa, PTRIN(args->addr), len); 1116 1117 free(sa, M_SONAME); 1118 if (error == 0) 1119 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 1120 return (error); 1121 } 1122 1123 int 1124 linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 1125 { 1126 int domain, error, sv[2], type; 1127 1128 domain = linux_to_bsd_domain(args->domain); 1129 if (domain != PF_LOCAL) 1130 return (EAFNOSUPPORT); 1131 type = args->type & LINUX_SOCK_TYPE_MASK; 1132 if (type < 0 || type > LINUX_SOCK_MAX) 1133 return (EINVAL); 1134 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 1135 &type); 1136 if (error != 0) 1137 return (error); 1138 if (args->protocol != 0 && args->protocol != PF_UNIX) { 1139 /* 1140 * Use of PF_UNIX as protocol argument is not right, 1141 * but Linux does it. 1142 * Do not map PF_UNIX as its Linux value is identical 1143 * to FreeBSD one. 1144 */ 1145 return (EPROTONOSUPPORT); 1146 } 1147 error = kern_socketpair(td, domain, type, 0, sv); 1148 if (error != 0) 1149 return (error); 1150 error = copyout(sv, PTRIN(args->rsv), 2 * sizeof(int)); 1151 if (error != 0) { 1152 (void)kern_close(td, sv[0]); 1153 (void)kern_close(td, sv[1]); 1154 } 1155 return (error); 1156 } 1157 1158 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1159 struct linux_send_args { 1160 register_t s; 1161 register_t msg; 1162 register_t len; 1163 register_t flags; 1164 }; 1165 1166 static int 1167 linux_send(struct thread *td, struct linux_send_args *args) 1168 { 1169 struct sendto_args /* { 1170 int s; 1171 caddr_t buf; 1172 int len; 1173 int flags; 1174 caddr_t to; 1175 int tolen; 1176 } */ bsd_args; 1177 struct file *fp; 1178 int error, fflag; 1179 1180 bsd_args.s = args->s; 1181 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1182 bsd_args.len = args->len; 1183 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1184 bsd_args.to = NULL; 1185 bsd_args.tolen = 0; 1186 error = sys_sendto(td, &bsd_args); 1187 if (error == ENOTCONN) { 1188 /* 1189 * Linux doesn't return ENOTCONN for non-blocking sockets. 1190 * Instead it returns the EAGAIN. 1191 */ 1192 error = getsock_cap(td, args->s, &cap_send_rights, &fp, 1193 &fflag, NULL); 1194 if (error == 0) { 1195 if (fflag & FNONBLOCK) 1196 error = EAGAIN; 1197 fdrop(fp, td); 1198 } 1199 } 1200 return (error); 1201 } 1202 1203 struct linux_recv_args { 1204 register_t s; 1205 register_t msg; 1206 register_t len; 1207 register_t flags; 1208 }; 1209 1210 static int 1211 linux_recv(struct thread *td, struct linux_recv_args *args) 1212 { 1213 struct recvfrom_args /* { 1214 int s; 1215 caddr_t buf; 1216 int len; 1217 int flags; 1218 struct sockaddr *from; 1219 socklen_t fromlenaddr; 1220 } */ bsd_args; 1221 1222 bsd_args.s = args->s; 1223 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1224 bsd_args.len = args->len; 1225 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1226 bsd_args.from = NULL; 1227 bsd_args.fromlenaddr = 0; 1228 return (sys_recvfrom(td, &bsd_args)); 1229 } 1230 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1231 1232 int 1233 linux_sendto(struct thread *td, struct linux_sendto_args *args) 1234 { 1235 struct msghdr msg; 1236 struct iovec aiov; 1237 1238 if (linux_check_hdrincl(td, args->s) == 0) 1239 /* IP_HDRINCL set, tweak the packet before sending */ 1240 return (linux_sendto_hdrincl(td, args)); 1241 1242 msg.msg_name = PTRIN(args->to); 1243 msg.msg_namelen = args->tolen; 1244 msg.msg_iov = &aiov; 1245 msg.msg_iovlen = 1; 1246 msg.msg_control = NULL; 1247 msg.msg_flags = 0; 1248 aiov.iov_base = PTRIN(args->msg); 1249 aiov.iov_len = args->len; 1250 return (linux_sendit(td, args->s, &msg, args->flags, NULL, 1251 UIO_USERSPACE)); 1252 } 1253 1254 int 1255 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1256 { 1257 struct sockaddr *sa; 1258 struct msghdr msg; 1259 struct iovec aiov; 1260 int error, fromlen; 1261 1262 if (PTRIN(args->fromlen) != NULL) { 1263 error = copyin(PTRIN(args->fromlen), &fromlen, 1264 sizeof(fromlen)); 1265 if (error != 0) 1266 return (error); 1267 if (fromlen < 0) 1268 return (EINVAL); 1269 sa = malloc(fromlen, M_SONAME, M_WAITOK); 1270 } else { 1271 fromlen = 0; 1272 sa = NULL; 1273 } 1274 1275 msg.msg_name = sa; 1276 msg.msg_namelen = fromlen; 1277 msg.msg_iov = &aiov; 1278 msg.msg_iovlen = 1; 1279 aiov.iov_base = PTRIN(args->buf); 1280 aiov.iov_len = args->len; 1281 msg.msg_control = 0; 1282 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1283 1284 error = kern_recvit(td, args->s, &msg, UIO_SYSSPACE, NULL); 1285 if (error != 0) 1286 goto out; 1287 1288 if (PTRIN(args->from) != NULL) 1289 error = linux_copyout_sockaddr(sa, PTRIN(args->from), msg.msg_namelen); 1290 1291 if (error == 0 && PTRIN(args->fromlen) != NULL) 1292 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1293 sizeof(msg.msg_namelen)); 1294 out: 1295 free(sa, M_SONAME); 1296 return (error); 1297 } 1298 1299 static int 1300 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1301 l_uint flags) 1302 { 1303 struct cmsghdr *cmsg; 1304 struct mbuf *control; 1305 struct msghdr msg; 1306 struct l_cmsghdr linux_cmsg; 1307 struct l_cmsghdr *ptr_cmsg; 1308 struct l_msghdr linux_msghdr; 1309 struct iovec *iov; 1310 socklen_t datalen; 1311 struct sockaddr *sa; 1312 struct socket *so; 1313 sa_family_t sa_family; 1314 struct file *fp; 1315 void *data; 1316 l_size_t len; 1317 l_size_t clen; 1318 int error, fflag; 1319 1320 error = copyin(msghdr, &linux_msghdr, sizeof(linux_msghdr)); 1321 if (error != 0) 1322 return (error); 1323 1324 /* 1325 * Some Linux applications (ping) define a non-NULL control data 1326 * pointer, but a msg_controllen of 0, which is not allowed in the 1327 * FreeBSD system call interface. NULL the msg_control pointer in 1328 * order to handle this case. This should be checked, but allows the 1329 * Linux ping to work. 1330 */ 1331 if (PTRIN(linux_msghdr.msg_control) != NULL && 1332 linux_msghdr.msg_controllen == 0) 1333 linux_msghdr.msg_control = PTROUT(NULL); 1334 1335 error = linux_to_bsd_msghdr(&msg, &linux_msghdr); 1336 if (error != 0) 1337 return (error); 1338 1339 #ifdef COMPAT_LINUX32 1340 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1341 &iov, EMSGSIZE); 1342 #else 1343 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1344 #endif 1345 if (error != 0) 1346 return (error); 1347 1348 control = NULL; 1349 1350 error = kern_getsockname(td, s, &sa, &datalen); 1351 if (error != 0) 1352 goto bad; 1353 sa_family = sa->sa_family; 1354 free(sa, M_SONAME); 1355 1356 if (flags & LINUX_MSG_OOB) { 1357 error = EOPNOTSUPP; 1358 if (sa_family == AF_UNIX) 1359 goto bad; 1360 1361 error = getsock_cap(td, s, &cap_send_rights, &fp, 1362 &fflag, NULL); 1363 if (error != 0) 1364 goto bad; 1365 so = fp->f_data; 1366 if (so->so_type != SOCK_STREAM) 1367 error = EOPNOTSUPP; 1368 fdrop(fp, td); 1369 if (error != 0) 1370 goto bad; 1371 } 1372 1373 if (linux_msghdr.msg_controllen >= sizeof(struct l_cmsghdr)) { 1374 error = ENOBUFS; 1375 control = m_get(M_WAITOK, MT_CONTROL); 1376 MCLGET(control, M_WAITOK); 1377 data = mtod(control, void *); 1378 datalen = 0; 1379 1380 ptr_cmsg = PTRIN(linux_msghdr.msg_control); 1381 clen = linux_msghdr.msg_controllen; 1382 do { 1383 error = copyin(ptr_cmsg, &linux_cmsg, 1384 sizeof(struct l_cmsghdr)); 1385 if (error != 0) 1386 goto bad; 1387 1388 error = EINVAL; 1389 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr) || 1390 linux_cmsg.cmsg_len > clen) 1391 goto bad; 1392 1393 if (datalen + CMSG_HDRSZ > MCLBYTES) 1394 goto bad; 1395 1396 /* 1397 * Now we support only SCM_RIGHTS and SCM_CRED, 1398 * so return EINVAL in any other cmsg_type 1399 */ 1400 cmsg = data; 1401 cmsg->cmsg_type = 1402 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1403 cmsg->cmsg_level = 1404 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1405 if (cmsg->cmsg_type == -1 1406 || cmsg->cmsg_level != SOL_SOCKET) { 1407 linux_msg(curthread, 1408 "unsupported sendmsg cmsg level %d type %d", 1409 linux_cmsg.cmsg_level, linux_cmsg.cmsg_type); 1410 goto bad; 1411 } 1412 1413 /* 1414 * Some applications (e.g. pulseaudio) attempt to 1415 * send ancillary data even if the underlying protocol 1416 * doesn't support it which is not allowed in the 1417 * FreeBSD system call interface. 1418 */ 1419 if (sa_family != AF_UNIX) 1420 goto next; 1421 1422 if (cmsg->cmsg_type == SCM_CREDS) { 1423 len = sizeof(struct cmsgcred); 1424 if (datalen + CMSG_SPACE(len) > MCLBYTES) 1425 goto bad; 1426 1427 /* 1428 * The lower levels will fill in the structure 1429 */ 1430 memset(CMSG_DATA(data), 0, len); 1431 } else { 1432 len = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1433 if (datalen + CMSG_SPACE(len) < datalen || 1434 datalen + CMSG_SPACE(len) > MCLBYTES) 1435 goto bad; 1436 1437 error = copyin(LINUX_CMSG_DATA(ptr_cmsg), 1438 CMSG_DATA(data), len); 1439 if (error != 0) 1440 goto bad; 1441 } 1442 1443 cmsg->cmsg_len = CMSG_LEN(len); 1444 data = (char *)data + CMSG_SPACE(len); 1445 datalen += CMSG_SPACE(len); 1446 1447 next: 1448 if (clen <= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)) 1449 break; 1450 1451 clen -= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len); 1452 ptr_cmsg = (struct l_cmsghdr *)((char *)ptr_cmsg + 1453 LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)); 1454 } while(clen >= sizeof(struct l_cmsghdr)); 1455 1456 control->m_len = datalen; 1457 if (datalen == 0) { 1458 m_freem(control); 1459 control = NULL; 1460 } 1461 } 1462 1463 msg.msg_iov = iov; 1464 msg.msg_flags = 0; 1465 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1466 control = NULL; 1467 1468 bad: 1469 m_freem(control); 1470 free(iov, M_IOV); 1471 return (error); 1472 } 1473 1474 int 1475 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1476 { 1477 1478 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1479 args->flags)); 1480 } 1481 1482 int 1483 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1484 { 1485 struct l_mmsghdr *msg; 1486 l_uint retval; 1487 int error, datagrams; 1488 1489 if (args->vlen > UIO_MAXIOV) 1490 args->vlen = UIO_MAXIOV; 1491 1492 msg = PTRIN(args->msg); 1493 datagrams = 0; 1494 while (datagrams < args->vlen) { 1495 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1496 args->flags); 1497 if (error != 0) 1498 break; 1499 1500 retval = td->td_retval[0]; 1501 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1502 if (error != 0) 1503 break; 1504 ++msg; 1505 ++datagrams; 1506 } 1507 if (error == 0) 1508 td->td_retval[0] = datagrams; 1509 return (error); 1510 } 1511 1512 static int 1513 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1514 l_uint flags, struct msghdr *msg) 1515 { 1516 struct cmsghdr *cm; 1517 struct cmsgcred *cmcred; 1518 struct sockcred2 *scred; 1519 struct l_cmsghdr *linux_cmsg = NULL; 1520 struct l_ucred linux_ucred; 1521 socklen_t datalen, maxlen, outlen; 1522 struct l_msghdr linux_msghdr; 1523 struct iovec *iov, *uiov; 1524 struct mbuf *control = NULL; 1525 struct mbuf **controlp; 1526 struct timeval *ftmvl; 1527 struct sockaddr *sa; 1528 l_timeval ltmvl; 1529 caddr_t outbuf; 1530 void *data; 1531 int error, i, fd, fds, *fdp; 1532 1533 error = copyin(msghdr, &linux_msghdr, sizeof(linux_msghdr)); 1534 if (error != 0) 1535 return (error); 1536 1537 error = linux_to_bsd_msghdr(msg, &linux_msghdr); 1538 if (error != 0) 1539 return (error); 1540 1541 #ifdef COMPAT_LINUX32 1542 error = linux32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1543 &iov, EMSGSIZE); 1544 #else 1545 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1546 #endif 1547 if (error != 0) 1548 return (error); 1549 1550 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1551 msg->msg_namelen = min(msg->msg_namelen, SOCK_MAXADDRLEN); 1552 sa = malloc(msg->msg_namelen, M_SONAME, M_WAITOK); 1553 msg->msg_name = sa; 1554 } else { 1555 sa = NULL; 1556 msg->msg_name = NULL; 1557 } 1558 1559 uiov = msg->msg_iov; 1560 msg->msg_iov = iov; 1561 controlp = (msg->msg_control != NULL) ? &control : NULL; 1562 error = kern_recvit(td, s, msg, UIO_SYSSPACE, controlp); 1563 msg->msg_iov = uiov; 1564 if (error != 0) 1565 goto bad; 1566 1567 /* 1568 * Note that kern_recvit() updates msg->msg_namelen. 1569 */ 1570 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1571 msg->msg_name = PTRIN(linux_msghdr.msg_name); 1572 error = linux_copyout_sockaddr(sa, 1573 PTRIN(msg->msg_name), msg->msg_namelen); 1574 if (error != 0) 1575 goto bad; 1576 } 1577 1578 error = bsd_to_linux_msghdr(msg, &linux_msghdr); 1579 if (error != 0) 1580 goto bad; 1581 1582 maxlen = linux_msghdr.msg_controllen; 1583 linux_msghdr.msg_controllen = 0; 1584 if (control) { 1585 linux_cmsg = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1586 1587 msg->msg_control = mtod(control, struct cmsghdr *); 1588 msg->msg_controllen = control->m_len; 1589 1590 cm = CMSG_FIRSTHDR(msg); 1591 outbuf = PTRIN(linux_msghdr.msg_control); 1592 outlen = 0; 1593 while (cm != NULL) { 1594 linux_cmsg->cmsg_type = 1595 bsd_to_linux_cmsg_type(cm->cmsg_type); 1596 linux_cmsg->cmsg_level = 1597 bsd_to_linux_sockopt_level(cm->cmsg_level); 1598 if (linux_cmsg->cmsg_type == -1 || 1599 cm->cmsg_level != SOL_SOCKET) { 1600 linux_msg(curthread, 1601 "unsupported recvmsg cmsg level %d type %d", 1602 cm->cmsg_level, cm->cmsg_type); 1603 error = EINVAL; 1604 goto bad; 1605 } 1606 1607 data = CMSG_DATA(cm); 1608 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1609 1610 switch (cm->cmsg_type) { 1611 case SCM_RIGHTS: 1612 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1613 fds = datalen / sizeof(int); 1614 fdp = data; 1615 for (i = 0; i < fds; i++) { 1616 fd = *fdp++; 1617 (void)kern_fcntl(td, fd, 1618 F_SETFD, FD_CLOEXEC); 1619 } 1620 } 1621 break; 1622 1623 case SCM_CREDS: 1624 /* 1625 * Currently LOCAL_CREDS is never in 1626 * effect for Linux so no need to worry 1627 * about sockcred 1628 */ 1629 if (datalen != sizeof(*cmcred)) { 1630 error = EMSGSIZE; 1631 goto bad; 1632 } 1633 cmcred = (struct cmsgcred *)data; 1634 bzero(&linux_ucred, sizeof(linux_ucred)); 1635 linux_ucred.pid = cmcred->cmcred_pid; 1636 linux_ucred.uid = cmcred->cmcred_uid; 1637 linux_ucred.gid = cmcred->cmcred_gid; 1638 data = &linux_ucred; 1639 datalen = sizeof(linux_ucred); 1640 break; 1641 1642 case SCM_CREDS2: 1643 scred = data; 1644 bzero(&linux_ucred, sizeof(linux_ucred)); 1645 linux_ucred.pid = scred->sc_pid; 1646 linux_ucred.uid = scred->sc_uid; 1647 linux_ucred.gid = scred->sc_gid; 1648 data = &linux_ucred; 1649 datalen = sizeof(linux_ucred); 1650 break; 1651 1652 case SCM_TIMESTAMP: 1653 if (datalen != sizeof(struct timeval)) { 1654 error = EMSGSIZE; 1655 goto bad; 1656 } 1657 ftmvl = (struct timeval *)data; 1658 ltmvl.tv_sec = ftmvl->tv_sec; 1659 ltmvl.tv_usec = ftmvl->tv_usec; 1660 data = <mvl; 1661 datalen = sizeof(ltmvl); 1662 break; 1663 } 1664 1665 if (outlen + LINUX_CMSG_LEN(datalen) > maxlen) { 1666 if (outlen == 0) { 1667 error = EMSGSIZE; 1668 goto bad; 1669 } else { 1670 linux_msghdr.msg_flags |= LINUX_MSG_CTRUNC; 1671 m_dispose_extcontrolm(control); 1672 goto out; 1673 } 1674 } 1675 1676 linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); 1677 1678 error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); 1679 if (error != 0) 1680 goto bad; 1681 outbuf += L_CMSG_HDRSZ; 1682 1683 error = copyout(data, outbuf, datalen); 1684 if (error != 0) 1685 goto bad; 1686 1687 outbuf += LINUX_CMSG_ALIGN(datalen); 1688 outlen += LINUX_CMSG_LEN(datalen); 1689 1690 cm = CMSG_NXTHDR(msg, cm); 1691 } 1692 linux_msghdr.msg_controllen = outlen; 1693 } 1694 1695 out: 1696 error = copyout(&linux_msghdr, msghdr, sizeof(linux_msghdr)); 1697 1698 bad: 1699 if (control != NULL) { 1700 if (error != 0) 1701 m_dispose_extcontrolm(control); 1702 m_freem(control); 1703 } 1704 free(iov, M_IOV); 1705 free(linux_cmsg, M_LINUX); 1706 free(sa, M_SONAME); 1707 1708 return (error); 1709 } 1710 1711 int 1712 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1713 { 1714 struct msghdr bsd_msg; 1715 1716 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1717 args->flags, &bsd_msg)); 1718 } 1719 1720 int 1721 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1722 { 1723 struct l_mmsghdr *msg; 1724 struct msghdr bsd_msg; 1725 struct l_timespec lts; 1726 struct timespec ts, tts; 1727 l_uint retval; 1728 int error, datagrams; 1729 1730 if (args->timeout) { 1731 error = copyin(args->timeout, <s, sizeof(struct l_timespec)); 1732 if (error != 0) 1733 return (error); 1734 error = linux_to_native_timespec(&ts, <s); 1735 if (error != 0) 1736 return (error); 1737 getnanotime(&tts); 1738 timespecadd(&tts, &ts, &tts); 1739 } 1740 1741 msg = PTRIN(args->msg); 1742 datagrams = 0; 1743 while (datagrams < args->vlen) { 1744 error = linux_recvmsg_common(td, args->s, &msg->msg_hdr, 1745 args->flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1746 if (error != 0) 1747 break; 1748 1749 retval = td->td_retval[0]; 1750 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1751 if (error != 0) 1752 break; 1753 ++msg; 1754 ++datagrams; 1755 1756 /* 1757 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1758 */ 1759 if (args->flags & LINUX_MSG_WAITFORONE) 1760 args->flags |= LINUX_MSG_DONTWAIT; 1761 1762 /* 1763 * See BUGS section of recvmmsg(2). 1764 */ 1765 if (args->timeout) { 1766 getnanotime(&ts); 1767 timespecsub(&ts, &tts, &ts); 1768 if (!timespecisset(&ts) || ts.tv_sec > 0) 1769 break; 1770 } 1771 /* Out of band data, return right away. */ 1772 if (bsd_msg.msg_flags & MSG_OOB) 1773 break; 1774 } 1775 if (error == 0) 1776 td->td_retval[0] = datagrams; 1777 return (error); 1778 } 1779 1780 int 1781 linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 1782 { 1783 1784 return (kern_shutdown(td, args->s, args->how)); 1785 } 1786 1787 int 1788 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 1789 { 1790 l_timeval linux_tv; 1791 struct sockaddr *sa; 1792 struct timeval tv; 1793 socklen_t len; 1794 int error, level, name; 1795 1796 level = linux_to_bsd_sockopt_level(args->level); 1797 switch (level) { 1798 case SOL_SOCKET: 1799 name = linux_to_bsd_so_sockopt(args->optname); 1800 switch (name) { 1801 case LOCAL_CREDS_PERSISTENT: 1802 level = SOL_LOCAL; 1803 break; 1804 case SO_RCVTIMEO: 1805 /* FALLTHROUGH */ 1806 case SO_SNDTIMEO: 1807 error = copyin(PTRIN(args->optval), &linux_tv, 1808 sizeof(linux_tv)); 1809 if (error != 0) 1810 return (error); 1811 tv.tv_sec = linux_tv.tv_sec; 1812 tv.tv_usec = linux_tv.tv_usec; 1813 return (kern_setsockopt(td, args->s, level, 1814 name, &tv, UIO_SYSSPACE, sizeof(tv))); 1815 /* NOTREACHED */ 1816 default: 1817 break; 1818 } 1819 break; 1820 case IPPROTO_IP: 1821 if (args->optname == LINUX_IP_RECVERR && 1822 linux_ignore_ip_recverr) { 1823 /* 1824 * XXX: This is a hack to unbreak DNS resolution 1825 * with glibc 2.30 and above. 1826 */ 1827 return (0); 1828 } 1829 name = linux_to_bsd_ip_sockopt(args->optname); 1830 break; 1831 case IPPROTO_IPV6: 1832 name = linux_to_bsd_ip6_sockopt(args->optname); 1833 break; 1834 case IPPROTO_TCP: 1835 name = linux_to_bsd_tcp_sockopt(args->optname); 1836 break; 1837 default: 1838 name = -1; 1839 break; 1840 } 1841 if (name < 0) { 1842 if (name == -1) 1843 linux_msg(curthread, 1844 "unsupported setsockopt level %d optname %d", 1845 args->level, args->optname); 1846 return (ENOPROTOOPT); 1847 } 1848 1849 if (name == IPV6_NEXTHOP) { 1850 len = args->optlen; 1851 error = linux_to_bsd_sockaddr(PTRIN(args->optval), &sa, &len); 1852 if (error != 0) 1853 return (error); 1854 1855 error = kern_setsockopt(td, args->s, level, 1856 name, sa, UIO_SYSSPACE, len); 1857 free(sa, M_SONAME); 1858 } else { 1859 error = kern_setsockopt(td, args->s, level, 1860 name, PTRIN(args->optval), UIO_USERSPACE, args->optlen); 1861 } 1862 1863 return (error); 1864 } 1865 1866 static int 1867 linux_getsockopt_so_peersec(struct thread *td, 1868 struct linux_getsockopt_args *args) 1869 { 1870 socklen_t len; 1871 int error; 1872 1873 len = sizeof(SECURITY_CONTEXT_STRING); 1874 if (args->optlen < len) { 1875 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 1876 if (error == 0) 1877 error = ERANGE; 1878 return (error); 1879 } 1880 1881 error = copyout(SECURITY_CONTEXT_STRING, 1882 PTRIN(args->optval), sizeof(SECURITY_CONTEXT_STRING)); 1883 if (error == 0) 1884 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 1885 return (error); 1886 } 1887 1888 int 1889 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 1890 { 1891 l_timeval linux_tv; 1892 struct timeval tv; 1893 socklen_t tv_len, xulen, len; 1894 struct sockaddr *sa; 1895 struct xucred xu; 1896 struct l_ucred lxu; 1897 int error, level, name, newval; 1898 1899 level = linux_to_bsd_sockopt_level(args->level); 1900 switch (level) { 1901 case SOL_SOCKET: 1902 if (args->optname == LINUX_SO_PEERSEC) 1903 return (linux_getsockopt_so_peersec(td, args)); 1904 name = linux_to_bsd_so_sockopt(args->optname); 1905 switch (name) { 1906 case LOCAL_CREDS_PERSISTENT: 1907 level = SOL_LOCAL; 1908 break; 1909 case SO_RCVTIMEO: 1910 /* FALLTHROUGH */ 1911 case SO_SNDTIMEO: 1912 tv_len = sizeof(tv); 1913 error = kern_getsockopt(td, args->s, level, 1914 name, &tv, UIO_SYSSPACE, &tv_len); 1915 if (error != 0) 1916 return (error); 1917 linux_tv.tv_sec = tv.tv_sec; 1918 linux_tv.tv_usec = tv.tv_usec; 1919 return (copyout(&linux_tv, PTRIN(args->optval), 1920 sizeof(linux_tv))); 1921 /* NOTREACHED */ 1922 case LOCAL_PEERCRED: 1923 if (args->optlen < sizeof(lxu)) 1924 return (EINVAL); 1925 /* 1926 * LOCAL_PEERCRED is not served at the SOL_SOCKET level, 1927 * but by the Unix socket's level 0. 1928 */ 1929 level = 0; 1930 xulen = sizeof(xu); 1931 error = kern_getsockopt(td, args->s, level, 1932 name, &xu, UIO_SYSSPACE, &xulen); 1933 if (error != 0) 1934 return (error); 1935 lxu.pid = xu.cr_pid; 1936 lxu.uid = xu.cr_uid; 1937 lxu.gid = xu.cr_gid; 1938 return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); 1939 /* NOTREACHED */ 1940 case SO_ERROR: 1941 len = sizeof(newval); 1942 error = kern_getsockopt(td, args->s, level, 1943 name, &newval, UIO_SYSSPACE, &len); 1944 if (error != 0) 1945 return (error); 1946 newval = -bsd_to_linux_errno(newval); 1947 return (copyout(&newval, PTRIN(args->optval), len)); 1948 /* NOTREACHED */ 1949 default: 1950 break; 1951 } 1952 break; 1953 case IPPROTO_IP: 1954 name = linux_to_bsd_ip_sockopt(args->optname); 1955 break; 1956 case IPPROTO_IPV6: 1957 name = linux_to_bsd_ip6_sockopt(args->optname); 1958 break; 1959 case IPPROTO_TCP: 1960 name = linux_to_bsd_tcp_sockopt(args->optname); 1961 break; 1962 default: 1963 name = -1; 1964 break; 1965 } 1966 if (name < 0) { 1967 if (name == -1) 1968 linux_msg(curthread, 1969 "unsupported getsockopt level %d optname %d", 1970 args->level, args->optname); 1971 return (EINVAL); 1972 } 1973 1974 if (name == IPV6_NEXTHOP) { 1975 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 1976 if (error != 0) 1977 return (error); 1978 sa = malloc(len, M_SONAME, M_WAITOK); 1979 1980 error = kern_getsockopt(td, args->s, level, 1981 name, sa, UIO_SYSSPACE, &len); 1982 if (error != 0) 1983 goto out; 1984 1985 error = linux_copyout_sockaddr(sa, PTRIN(args->optval), len); 1986 if (error == 0) 1987 error = copyout(&len, PTRIN(args->optlen), 1988 sizeof(len)); 1989 out: 1990 free(sa, M_SONAME); 1991 } else { 1992 if (args->optval) { 1993 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 1994 if (error != 0) 1995 return (error); 1996 } 1997 error = kern_getsockopt(td, args->s, level, 1998 name, PTRIN(args->optval), UIO_USERSPACE, &len); 1999 if (error == 0) 2000 error = copyout(&len, PTRIN(args->optlen), 2001 sizeof(len)); 2002 } 2003 2004 return (error); 2005 } 2006 2007 static int 2008 linux_sendfile_common(struct thread *td, l_int out, l_int in, 2009 l_loff_t *offset, l_size_t count) 2010 { 2011 off_t bytes_read; 2012 int error; 2013 l_loff_t current_offset; 2014 struct file *fp; 2015 2016 AUDIT_ARG_FD(in); 2017 error = fget_read(td, in, &cap_pread_rights, &fp); 2018 if (error != 0) 2019 return (error); 2020 2021 if (offset != NULL) { 2022 current_offset = *offset; 2023 } else { 2024 error = (fp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0 ? 2025 fo_seek(fp, 0, SEEK_CUR, td) : ESPIPE; 2026 if (error != 0) 2027 goto drop; 2028 current_offset = td->td_uretoff.tdu_off; 2029 } 2030 2031 bytes_read = 0; 2032 2033 /* Linux cannot have 0 count. */ 2034 if (count <= 0 || current_offset < 0) { 2035 error = EINVAL; 2036 goto drop; 2037 } 2038 2039 error = fo_sendfile(fp, out, NULL, NULL, current_offset, count, 2040 &bytes_read, 0, td); 2041 if (error != 0) 2042 goto drop; 2043 current_offset += bytes_read; 2044 2045 if (offset != NULL) { 2046 *offset = current_offset; 2047 } else { 2048 error = fo_seek(fp, current_offset, SEEK_SET, td); 2049 if (error != 0) 2050 goto drop; 2051 } 2052 2053 td->td_retval[0] = (ssize_t)bytes_read; 2054 drop: 2055 fdrop(fp, td); 2056 return (error); 2057 } 2058 2059 int 2060 linux_sendfile(struct thread *td, struct linux_sendfile_args *arg) 2061 { 2062 /* 2063 * Differences between FreeBSD and Linux sendfile: 2064 * - Linux doesn't send anything when count is 0 (FreeBSD uses 0 to 2065 * mean send the whole file.) In linux_sendfile given fds are still 2066 * checked for validity when the count is 0. 2067 * - Linux can send to any fd whereas FreeBSD only supports sockets. 2068 * The same restriction follows for linux_sendfile. 2069 * - Linux doesn't have an equivalent for FreeBSD's flags and sf_hdtr. 2070 * - Linux takes an offset pointer and updates it to the read location. 2071 * FreeBSD takes in an offset and a 'bytes read' parameter which is 2072 * only filled if it isn't NULL. We use this parameter to update the 2073 * offset pointer if it exists. 2074 * - Linux sendfile returns bytes read on success while FreeBSD 2075 * returns 0. We use the 'bytes read' parameter to get this value. 2076 */ 2077 2078 l_loff_t offset64; 2079 l_long offset; 2080 int ret; 2081 int error; 2082 2083 if (arg->offset != NULL) { 2084 error = copyin(arg->offset, &offset, sizeof(offset)); 2085 if (error != 0) 2086 return (error); 2087 offset64 = (l_loff_t)offset; 2088 } 2089 2090 ret = linux_sendfile_common(td, arg->out, arg->in, 2091 arg->offset != NULL ? &offset64 : NULL, arg->count); 2092 2093 if (arg->offset != NULL) { 2094 #if defined(__i386__) || defined(__arm__) || \ 2095 (defined(__amd64__) && defined(COMPAT_LINUX32)) 2096 if (offset64 > INT32_MAX) 2097 return (EOVERFLOW); 2098 #endif 2099 offset = (l_long)offset64; 2100 error = copyout(&offset, arg->offset, sizeof(offset)); 2101 if (error != 0) 2102 return (error); 2103 } 2104 2105 return (ret); 2106 } 2107 2108 #if defined(__i386__) || defined(__arm__) || \ 2109 (defined(__amd64__) && defined(COMPAT_LINUX32)) 2110 2111 int 2112 linux_sendfile64(struct thread *td, struct linux_sendfile64_args *arg) 2113 { 2114 l_loff_t offset; 2115 int ret; 2116 int error; 2117 2118 if (arg->offset != NULL) { 2119 error = copyin(arg->offset, &offset, sizeof(offset)); 2120 if (error != 0) 2121 return (error); 2122 } 2123 2124 ret = linux_sendfile_common(td, arg->out, arg->in, 2125 arg->offset != NULL ? &offset : NULL, arg->count); 2126 2127 if (arg->offset != NULL) { 2128 error = copyout(&offset, arg->offset, sizeof(offset)); 2129 if (error != 0) 2130 return (error); 2131 } 2132 2133 return (ret); 2134 } 2135 2136 /* Argument list sizes for linux_socketcall */ 2137 static const unsigned char lxs_args_cnt[] = { 2138 0 /* unused*/, 3 /* socket */, 2139 3 /* bind */, 3 /* connect */, 2140 2 /* listen */, 3 /* accept */, 2141 3 /* getsockname */, 3 /* getpeername */, 2142 4 /* socketpair */, 4 /* send */, 2143 4 /* recv */, 6 /* sendto */, 2144 6 /* recvfrom */, 2 /* shutdown */, 2145 5 /* setsockopt */, 5 /* getsockopt */, 2146 3 /* sendmsg */, 3 /* recvmsg */, 2147 4 /* accept4 */, 5 /* recvmmsg */, 2148 4 /* sendmmsg */, 4 /* sendfile */ 2149 }; 2150 #define LINUX_ARGS_CNT (nitems(lxs_args_cnt) - 1) 2151 #define LINUX_ARG_SIZE(x) (lxs_args_cnt[x] * sizeof(l_ulong)) 2152 2153 int 2154 linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 2155 { 2156 l_ulong a[6]; 2157 #if defined(__amd64__) && defined(COMPAT_LINUX32) 2158 register_t l_args[6]; 2159 #endif 2160 void *arg; 2161 int error; 2162 2163 if (args->what < LINUX_SOCKET || args->what > LINUX_ARGS_CNT) 2164 return (EINVAL); 2165 error = copyin(PTRIN(args->args), a, LINUX_ARG_SIZE(args->what)); 2166 if (error != 0) 2167 return (error); 2168 2169 #if defined(__amd64__) && defined(COMPAT_LINUX32) 2170 for (int i = 0; i < lxs_args_cnt[args->what]; ++i) 2171 l_args[i] = a[i]; 2172 arg = l_args; 2173 #else 2174 arg = a; 2175 #endif 2176 switch (args->what) { 2177 case LINUX_SOCKET: 2178 return (linux_socket(td, arg)); 2179 case LINUX_BIND: 2180 return (linux_bind(td, arg)); 2181 case LINUX_CONNECT: 2182 return (linux_connect(td, arg)); 2183 case LINUX_LISTEN: 2184 return (linux_listen(td, arg)); 2185 case LINUX_ACCEPT: 2186 return (linux_accept(td, arg)); 2187 case LINUX_GETSOCKNAME: 2188 return (linux_getsockname(td, arg)); 2189 case LINUX_GETPEERNAME: 2190 return (linux_getpeername(td, arg)); 2191 case LINUX_SOCKETPAIR: 2192 return (linux_socketpair(td, arg)); 2193 case LINUX_SEND: 2194 return (linux_send(td, arg)); 2195 case LINUX_RECV: 2196 return (linux_recv(td, arg)); 2197 case LINUX_SENDTO: 2198 return (linux_sendto(td, arg)); 2199 case LINUX_RECVFROM: 2200 return (linux_recvfrom(td, arg)); 2201 case LINUX_SHUTDOWN: 2202 return (linux_shutdown(td, arg)); 2203 case LINUX_SETSOCKOPT: 2204 return (linux_setsockopt(td, arg)); 2205 case LINUX_GETSOCKOPT: 2206 return (linux_getsockopt(td, arg)); 2207 case LINUX_SENDMSG: 2208 return (linux_sendmsg(td, arg)); 2209 case LINUX_RECVMSG: 2210 return (linux_recvmsg(td, arg)); 2211 case LINUX_ACCEPT4: 2212 return (linux_accept4(td, arg)); 2213 case LINUX_RECVMMSG: 2214 return (linux_recvmmsg(td, arg)); 2215 case LINUX_SENDMMSG: 2216 return (linux_sendmmsg(td, arg)); 2217 case LINUX_SENDFILE: 2218 return (linux_sendfile(td, arg)); 2219 } 2220 2221 linux_msg(td, "socket type %d not implemented", args->what); 2222 return (ENOSYS); 2223 } 2224 #endif /* __i386__ || __arm__ || (__amd64__ && COMPAT_LINUX32) */
Cache object: 40a54e4291584127db1a40677a140728
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