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