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