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