1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 "opt_inet6.h" 30 31 #include <sys/param.h> 32 #include <sys/capsicum.h> 33 #include <sys/filedesc.h> 34 #include <sys/limits.h> 35 #include <sys/malloc.h> 36 #include <sys/mbuf.h> 37 #include <sys/proc.h> 38 #include <sys/protosw.h> 39 #include <sys/socket.h> 40 #include <sys/socketvar.h> 41 #include <sys/syscallsubr.h> 42 #include <sys/sysproto.h> 43 #include <sys/vnode.h> 44 #include <sys/un.h> 45 #include <sys/unistd.h> 46 47 #include <security/audit/audit.h> 48 49 #include <net/if.h> 50 #include <net/vnet.h> 51 #include <netinet/in.h> 52 #include <netinet/ip.h> 53 #include <netinet/tcp.h> 54 #ifdef INET6 55 #include <netinet/ip6.h> 56 #include <netinet6/ip6_var.h> 57 #endif 58 59 #ifdef COMPAT_LINUX32 60 #include <compat/freebsd32/freebsd32_util.h> 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 _Static_assert(offsetof(struct l_ifreq, ifr_ifru) == 76 offsetof(struct ifreq, ifr_ifru), 77 "Linux ifreq members names should be equal to FreeeBSD"); 78 _Static_assert(offsetof(struct l_ifreq, ifr_index) == 79 offsetof(struct ifreq, ifr_index), 80 "Linux ifreq members names should be equal to FreeeBSD"); 81 _Static_assert(offsetof(struct l_ifreq, ifr_name) == 82 offsetof(struct ifreq, ifr_name), 83 "Linux ifreq members names should be equal to FreeeBSD"); 84 85 #define SECURITY_CONTEXT_STRING "unconfined" 86 87 static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *, 88 l_uint); 89 static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *, 90 l_uint, struct msghdr *); 91 static int linux_set_socket_flags(int, int *); 92 93 #define SOL_NETLINK 270 94 95 static int 96 linux_to_bsd_sockopt_level(int level) 97 { 98 99 if (level == LINUX_SOL_SOCKET) 100 return (SOL_SOCKET); 101 /* Remaining values are RFC-defined protocol numbers. */ 102 return (level); 103 } 104 105 static int 106 bsd_to_linux_sockopt_level(int level) 107 { 108 109 if (level == SOL_SOCKET) 110 return (LINUX_SOL_SOCKET); 111 return (level); 112 } 113 114 static int 115 linux_to_bsd_ip_sockopt(int opt) 116 { 117 118 switch (opt) { 119 /* known and translated sockopts */ 120 case LINUX_IP_TOS: 121 return (IP_TOS); 122 case LINUX_IP_TTL: 123 return (IP_TTL); 124 case LINUX_IP_HDRINCL: 125 return (IP_HDRINCL); 126 case LINUX_IP_OPTIONS: 127 return (IP_OPTIONS); 128 case LINUX_IP_RECVOPTS: 129 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVOPTS"); 130 return (IP_RECVOPTS); 131 case LINUX_IP_RETOPTS: 132 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_REETOPTS"); 133 return (IP_RETOPTS); 134 case LINUX_IP_RECVTTL: 135 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVTTL"); 136 return (IP_RECVTTL); 137 case LINUX_IP_RECVTOS: 138 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_RECVTOS"); 139 return (IP_RECVTOS); 140 case LINUX_IP_FREEBIND: 141 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_FREEBIND"); 142 return (IP_BINDANY); 143 case LINUX_IP_IPSEC_POLICY: 144 /* we have this option, but not documented in ip(4) manpage */ 145 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_IPSEC_POLICY"); 146 return (IP_IPSEC_POLICY); 147 case LINUX_IP_MINTTL: 148 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MINTTL"); 149 return (IP_MINTTL); 150 case LINUX_IP_MULTICAST_IF: 151 return (IP_MULTICAST_IF); 152 case LINUX_IP_MULTICAST_TTL: 153 return (IP_MULTICAST_TTL); 154 case LINUX_IP_MULTICAST_LOOP: 155 return (IP_MULTICAST_LOOP); 156 case LINUX_IP_ADD_MEMBERSHIP: 157 return (IP_ADD_MEMBERSHIP); 158 case LINUX_IP_DROP_MEMBERSHIP: 159 return (IP_DROP_MEMBERSHIP); 160 case LINUX_IP_UNBLOCK_SOURCE: 161 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_UNBLOCK_SOURCE"); 162 return (IP_UNBLOCK_SOURCE); 163 case LINUX_IP_BLOCK_SOURCE: 164 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_BLOCK_SOURCE"); 165 return (IP_BLOCK_SOURCE); 166 case LINUX_IP_ADD_SOURCE_MEMBERSHIP: 167 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_ADD_SOURCE_MEMBERSHIP"); 168 return (IP_ADD_SOURCE_MEMBERSHIP); 169 case LINUX_IP_DROP_SOURCE_MEMBERSHIP: 170 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_DROP_SOURCE_MEMBERSHIP"); 171 return (IP_DROP_SOURCE_MEMBERSHIP); 172 case LINUX_MCAST_JOIN_GROUP: 173 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_JOIN_GROUP"); 174 return (MCAST_JOIN_GROUP); 175 case LINUX_MCAST_LEAVE_GROUP: 176 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_LEAVE_GROUP"); 177 return (MCAST_LEAVE_GROUP); 178 case LINUX_MCAST_JOIN_SOURCE_GROUP: 179 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_JOIN_SOURCE_GROUP"); 180 return (MCAST_JOIN_SOURCE_GROUP); 181 case LINUX_MCAST_LEAVE_SOURCE_GROUP: 182 LINUX_RATELIMIT_MSG_NOTTESTED("IPv4 socket option IP_MCAST_LEAVE_SOURCE_GROUP"); 183 return (MCAST_LEAVE_SOURCE_GROUP); 184 case LINUX_IP_RECVORIGDSTADDR: 185 return (IP_RECVORIGDSTADDR); 186 187 /* known but not implemented sockopts */ 188 case LINUX_IP_ROUTER_ALERT: 189 LINUX_RATELIMIT_MSG_OPT1( 190 "unsupported IPv4 socket option IP_ROUTER_ALERT (%d), you can not do user-space routing from linux programs", 191 opt); 192 return (-2); 193 case LINUX_IP_PKTINFO: 194 LINUX_RATELIMIT_MSG_OPT1( 195 "unsupported IPv4 socket option IP_PKTINFO (%d), you can not get extended packet info for datagram sockets in linux programs", 196 opt); 197 return (-2); 198 case LINUX_IP_PKTOPTIONS: 199 LINUX_RATELIMIT_MSG_OPT1( 200 "unsupported IPv4 socket option IP_PKTOPTIONS (%d)", 201 opt); 202 return (-2); 203 case LINUX_IP_MTU_DISCOVER: 204 LINUX_RATELIMIT_MSG_OPT1( 205 "unsupported IPv4 socket option IP_MTU_DISCOVER (%d), your linux program can not control path-MTU discovery", 206 opt); 207 return (-2); 208 case LINUX_IP_RECVERR: 209 /* needed by steam */ 210 LINUX_RATELIMIT_MSG_OPT1( 211 "unsupported IPv4 socket option IP_RECVERR (%d), you can not get extended reliability info in linux programs", 212 opt); 213 return (-2); 214 case LINUX_IP_MTU: 215 LINUX_RATELIMIT_MSG_OPT1( 216 "unsupported IPv4 socket option IP_MTU (%d), your linux program can not control the MTU on this socket", 217 opt); 218 return (-2); 219 case LINUX_IP_XFRM_POLICY: 220 LINUX_RATELIMIT_MSG_OPT1( 221 "unsupported IPv4 socket option IP_XFRM_POLICY (%d)", 222 opt); 223 return (-2); 224 case LINUX_IP_PASSSEC: 225 /* needed by steam */ 226 LINUX_RATELIMIT_MSG_OPT1( 227 "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", 228 opt); 229 return (-2); 230 case LINUX_IP_TRANSPARENT: 231 /* IP_BINDANY or more? */ 232 LINUX_RATELIMIT_MSG_OPT1( 233 "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", 234 opt); 235 return (-2); 236 case LINUX_IP_NODEFRAG: 237 LINUX_RATELIMIT_MSG_OPT1( 238 "unsupported IPv4 socket option IP_NODEFRAG (%d)", 239 opt); 240 return (-2); 241 case LINUX_IP_CHECKSUM: 242 LINUX_RATELIMIT_MSG_OPT1( 243 "unsupported IPv4 socket option IP_CHECKSUM (%d)", 244 opt); 245 return (-2); 246 case LINUX_IP_BIND_ADDRESS_NO_PORT: 247 LINUX_RATELIMIT_MSG_OPT1( 248 "unsupported IPv4 socket option IP_BIND_ADDRESS_NO_PORT (%d)", 249 opt); 250 return (-2); 251 case LINUX_IP_RECVFRAGSIZE: 252 LINUX_RATELIMIT_MSG_OPT1( 253 "unsupported IPv4 socket option IP_RECVFRAGSIZE (%d)", 254 opt); 255 return (-2); 256 case LINUX_MCAST_MSFILTER: 257 LINUX_RATELIMIT_MSG_OPT1( 258 "unsupported IPv4 socket option IP_MCAST_MSFILTER (%d)", 259 opt); 260 return (-2); 261 case LINUX_IP_MULTICAST_ALL: 262 LINUX_RATELIMIT_MSG_OPT1( 263 "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", 264 opt); 265 return (-2); 266 case LINUX_IP_UNICAST_IF: 267 LINUX_RATELIMIT_MSG_OPT1( 268 "unsupported IPv4 socket option IP_UNICAST_IF (%d)", 269 opt); 270 return (-2); 271 272 /* unknown sockopts */ 273 default: 274 return (-1); 275 } 276 } 277 278 static int 279 linux_to_bsd_ip6_sockopt(int opt) 280 { 281 282 switch (opt) { 283 /* known and translated sockopts */ 284 case LINUX_IPV6_2292PKTINFO: 285 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292PKTINFO"); 286 return (IPV6_2292PKTINFO); 287 case LINUX_IPV6_2292HOPOPTS: 288 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292HOPOPTS"); 289 return (IPV6_2292HOPOPTS); 290 case LINUX_IPV6_2292DSTOPTS: 291 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292DSTOPTS"); 292 return (IPV6_2292DSTOPTS); 293 case LINUX_IPV6_2292RTHDR: 294 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292RTHDR"); 295 return (IPV6_2292RTHDR); 296 case LINUX_IPV6_2292PKTOPTIONS: 297 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292PKTOPTIONS"); 298 return (IPV6_2292PKTOPTIONS); 299 case LINUX_IPV6_CHECKSUM: 300 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_CHECKSUM"); 301 return (IPV6_CHECKSUM); 302 case LINUX_IPV6_2292HOPLIMIT: 303 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_2292HOPLIMIT"); 304 return (IPV6_2292HOPLIMIT); 305 case LINUX_IPV6_NEXTHOP: 306 return (IPV6_NEXTHOP); 307 case LINUX_IPV6_UNICAST_HOPS: 308 return (IPV6_UNICAST_HOPS); 309 case LINUX_IPV6_MULTICAST_IF: 310 return (IPV6_MULTICAST_IF); 311 case LINUX_IPV6_MULTICAST_HOPS: 312 return (IPV6_MULTICAST_HOPS); 313 case LINUX_IPV6_MULTICAST_LOOP: 314 return (IPV6_MULTICAST_LOOP); 315 case LINUX_IPV6_ADD_MEMBERSHIP: 316 return (IPV6_JOIN_GROUP); 317 case LINUX_IPV6_DROP_MEMBERSHIP: 318 return (IPV6_LEAVE_GROUP); 319 case LINUX_IPV6_V6ONLY: 320 return (IPV6_V6ONLY); 321 case LINUX_IPV6_IPSEC_POLICY: 322 /* we have this option, but not documented in ip6(4) manpage */ 323 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_IPSEC_POLICY"); 324 return (IPV6_IPSEC_POLICY); 325 case LINUX_MCAST_JOIN_GROUP: 326 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_JOIN_GROUP"); 327 return (IPV6_JOIN_GROUP); 328 case LINUX_MCAST_LEAVE_GROUP: 329 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_LEAVE_GROUP"); 330 return (IPV6_LEAVE_GROUP); 331 case LINUX_IPV6_RECVPKTINFO: 332 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVPKTINFO"); 333 return (IPV6_RECVPKTINFO); 334 case LINUX_IPV6_PKTINFO: 335 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_PKTINFO"); 336 return (IPV6_PKTINFO); 337 case LINUX_IPV6_RECVHOPLIMIT: 338 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVHOPLIMIT"); 339 return (IPV6_RECVHOPLIMIT); 340 case LINUX_IPV6_HOPLIMIT: 341 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_HOPLIMIT"); 342 return (IPV6_HOPLIMIT); 343 case LINUX_IPV6_RECVHOPOPTS: 344 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVHOPOPTS"); 345 return (IPV6_RECVHOPOPTS); 346 case LINUX_IPV6_HOPOPTS: 347 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_HOPOPTS"); 348 return (IPV6_HOPOPTS); 349 case LINUX_IPV6_RTHDRDSTOPTS: 350 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RTHDRDSTOPTS"); 351 return (IPV6_RTHDRDSTOPTS); 352 case LINUX_IPV6_RECVRTHDR: 353 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVRTHDR"); 354 return (IPV6_RECVRTHDR); 355 case LINUX_IPV6_RTHDR: 356 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RTHDR"); 357 return (IPV6_RTHDR); 358 case LINUX_IPV6_RECVDSTOPTS: 359 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVDSTOPTS"); 360 return (IPV6_RECVDSTOPTS); 361 case LINUX_IPV6_DSTOPTS: 362 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_DSTOPTS"); 363 return (IPV6_DSTOPTS); 364 case LINUX_IPV6_RECVPATHMTU: 365 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_RECVPATHMTU"); 366 return (IPV6_RECVPATHMTU); 367 case LINUX_IPV6_PATHMTU: 368 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_PATHMTU"); 369 return (IPV6_PATHMTU); 370 case LINUX_IPV6_DONTFRAG: 371 return (IPV6_DONTFRAG); 372 case LINUX_IPV6_AUTOFLOWLABEL: 373 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_AUTOFLOWLABEL"); 374 return (IPV6_AUTOFLOWLABEL); 375 case LINUX_IPV6_ORIGDSTADDR: 376 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_ORIGDSTADDR"); 377 return (IPV6_ORIGDSTADDR); 378 case LINUX_IPV6_FREEBIND: 379 LINUX_RATELIMIT_MSG_NOTTESTED("IPv6 socket option IPV6_FREEBIND"); 380 return (IPV6_BINDANY); 381 382 /* known but not implemented sockopts */ 383 case LINUX_IPV6_ADDRFORM: 384 LINUX_RATELIMIT_MSG_OPT1( 385 "unsupported IPv6 socket option IPV6_ADDRFORM (%d), you linux program can not convert the socket to IPv4", 386 opt); 387 return (-2); 388 case LINUX_IPV6_AUTHHDR: 389 LINUX_RATELIMIT_MSG_OPT1( 390 "unsupported IPv6 socket option IPV6_AUTHHDR (%d), your linux program can not get the authentication header info of IPv6 packets", 391 opt); 392 return (-2); 393 case LINUX_IPV6_FLOWINFO: 394 LINUX_RATELIMIT_MSG_OPT1( 395 "unsupported IPv6 socket option IPV6_FLOWINFO (%d), your linux program can not get the flowid of IPv6 packets", 396 opt); 397 return (-2); 398 case LINUX_IPV6_ROUTER_ALERT: 399 LINUX_RATELIMIT_MSG_OPT1( 400 "unsupported IPv6 socket option IPV6_ROUTER_ALERT (%d), you can not do user-space routing from linux programs", 401 opt); 402 return (-2); 403 case LINUX_IPV6_MTU_DISCOVER: 404 LINUX_RATELIMIT_MSG_OPT1( 405 "unsupported IPv6 socket option IPV6_MTU_DISCOVER (%d), your linux program can not control path-MTU discovery", 406 opt); 407 return (-2); 408 case LINUX_IPV6_MTU: 409 LINUX_RATELIMIT_MSG_OPT1( 410 "unsupported IPv6 socket option IPV6_MTU (%d), your linux program can not control the MTU on this socket", 411 opt); 412 return (-2); 413 case LINUX_IPV6_JOIN_ANYCAST: 414 LINUX_RATELIMIT_MSG_OPT1( 415 "unsupported IPv6 socket option IPV6_JOIN_ANYCAST (%d)", 416 opt); 417 return (-2); 418 case LINUX_IPV6_LEAVE_ANYCAST: 419 LINUX_RATELIMIT_MSG_OPT1( 420 "unsupported IPv6 socket option IPV6_LEAVE_ANYCAST (%d)", 421 opt); 422 return (-2); 423 case LINUX_IPV6_MULTICAST_ALL: 424 LINUX_RATELIMIT_MSG_OPT1( 425 "unsupported IPv6 socket option IPV6_MULTICAST_ALL (%d)", 426 opt); 427 return (-2); 428 case LINUX_IPV6_ROUTER_ALERT_ISOLATE: 429 LINUX_RATELIMIT_MSG_OPT1( 430 "unsupported IPv6 socket option IPV6_ROUTER_ALERT_ISOLATE (%d)", 431 opt); 432 return (-2); 433 case LINUX_IPV6_FLOWLABEL_MGR: 434 LINUX_RATELIMIT_MSG_OPT1( 435 "unsupported IPv6 socket option IPV6_FLOWLABEL_MGR (%d)", 436 opt); 437 return (-2); 438 case LINUX_IPV6_FLOWINFO_SEND: 439 LINUX_RATELIMIT_MSG_OPT1( 440 "unsupported IPv6 socket option IPV6_FLOWINFO_SEND (%d)", 441 opt); 442 return (-2); 443 case LINUX_IPV6_XFRM_POLICY: 444 LINUX_RATELIMIT_MSG_OPT1( 445 "unsupported IPv6 socket option IPV6_XFRM_POLICY (%d)", 446 opt); 447 return (-2); 448 case LINUX_IPV6_HDRINCL: 449 LINUX_RATELIMIT_MSG_OPT1( 450 "unsupported IPv6 socket option IPV6_HDRINCL (%d)", 451 opt); 452 return (-2); 453 case LINUX_MCAST_BLOCK_SOURCE: 454 LINUX_RATELIMIT_MSG_OPT1( 455 "unsupported IPv6 socket option MCAST_BLOCK_SOURCE (%d), your linux program may see more multicast stuff than it wants", 456 opt); 457 return (-2); 458 case LINUX_MCAST_UNBLOCK_SOURCE: 459 LINUX_RATELIMIT_MSG_OPT1( 460 "unsupported IPv6 socket option MCAST_UNBLOCK_SOURCE (%d), your linux program may not see all the multicast stuff it wants", 461 opt); 462 return (-2); 463 case LINUX_MCAST_JOIN_SOURCE_GROUP: 464 LINUX_RATELIMIT_MSG_OPT1( 465 "unsupported IPv6 socket option MCAST_JOIN_SOURCE_GROUP (%d), your linux program is not able to join a multicast source group", 466 opt); 467 return (-2); 468 case LINUX_MCAST_LEAVE_SOURCE_GROUP: 469 LINUX_RATELIMIT_MSG_OPT1( 470 "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", 471 opt); 472 return (-2); 473 case LINUX_MCAST_MSFILTER: 474 LINUX_RATELIMIT_MSG_OPT1( 475 "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", 476 opt); 477 return (-2); 478 case LINUX_IPV6_ADDR_PREFERENCES: 479 LINUX_RATELIMIT_MSG_OPT1( 480 "unsupported IPv6 socket option IPV6_ADDR_PREFERENCES (%d)", 481 opt); 482 return (-2); 483 case LINUX_IPV6_MINHOPCOUNT: 484 LINUX_RATELIMIT_MSG_OPT1( 485 "unsupported IPv6 socket option IPV6_MINHOPCOUNT (%d)", 486 opt); 487 return (-2); 488 case LINUX_IPV6_TRANSPARENT: 489 /* IP_BINDANY or more? */ 490 LINUX_RATELIMIT_MSG_OPT1( 491 "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", 492 opt); 493 return (-2); 494 case LINUX_IPV6_UNICAST_IF: 495 LINUX_RATELIMIT_MSG_OPT1( 496 "unsupported IPv6 socket option IPV6_UNICAST_IF (%d)", 497 opt); 498 return (-2); 499 case LINUX_IPV6_RECVFRAGSIZE: 500 LINUX_RATELIMIT_MSG_OPT1( 501 "unsupported IPv6 socket option IPV6_RECVFRAGSIZE (%d)", 502 opt); 503 return (-2); 504 505 /* unknown sockopts */ 506 default: 507 return (-1); 508 } 509 } 510 511 static int 512 linux_to_bsd_so_sockopt(int opt) 513 { 514 515 switch (opt) { 516 case LINUX_SO_DEBUG: 517 return (SO_DEBUG); 518 case LINUX_SO_REUSEADDR: 519 return (SO_REUSEADDR); 520 case LINUX_SO_TYPE: 521 return (SO_TYPE); 522 case LINUX_SO_ERROR: 523 return (SO_ERROR); 524 case LINUX_SO_DONTROUTE: 525 return (SO_DONTROUTE); 526 case LINUX_SO_BROADCAST: 527 return (SO_BROADCAST); 528 case LINUX_SO_SNDBUF: 529 case LINUX_SO_SNDBUFFORCE: 530 return (SO_SNDBUF); 531 case LINUX_SO_RCVBUF: 532 case LINUX_SO_RCVBUFFORCE: 533 return (SO_RCVBUF); 534 case LINUX_SO_KEEPALIVE: 535 return (SO_KEEPALIVE); 536 case LINUX_SO_OOBINLINE: 537 return (SO_OOBINLINE); 538 case LINUX_SO_LINGER: 539 return (SO_LINGER); 540 case LINUX_SO_REUSEPORT: 541 return (SO_REUSEPORT_LB); 542 case LINUX_SO_PASSCRED: 543 return (LOCAL_CREDS_PERSISTENT); 544 case LINUX_SO_PEERCRED: 545 return (LOCAL_PEERCRED); 546 case LINUX_SO_RCVLOWAT: 547 return (SO_RCVLOWAT); 548 case LINUX_SO_SNDLOWAT: 549 return (SO_SNDLOWAT); 550 case LINUX_SO_RCVTIMEO: 551 return (SO_RCVTIMEO); 552 case LINUX_SO_SNDTIMEO: 553 return (SO_SNDTIMEO); 554 case LINUX_SO_TIMESTAMPO: 555 case LINUX_SO_TIMESTAMPN: 556 return (SO_TIMESTAMP); 557 case LINUX_SO_TIMESTAMPNSO: 558 case LINUX_SO_TIMESTAMPNSN: 559 return (SO_BINTIME); 560 case LINUX_SO_ACCEPTCONN: 561 return (SO_ACCEPTCONN); 562 case LINUX_SO_PROTOCOL: 563 return (SO_PROTOCOL); 564 case LINUX_SO_DOMAIN: 565 return (SO_DOMAIN); 566 } 567 return (-1); 568 } 569 570 static int 571 linux_to_bsd_tcp_sockopt(int opt) 572 { 573 574 switch (opt) { 575 case LINUX_TCP_NODELAY: 576 return (TCP_NODELAY); 577 case LINUX_TCP_MAXSEG: 578 return (TCP_MAXSEG); 579 case LINUX_TCP_CORK: 580 return (TCP_NOPUSH); 581 case LINUX_TCP_KEEPIDLE: 582 return (TCP_KEEPIDLE); 583 case LINUX_TCP_KEEPINTVL: 584 return (TCP_KEEPINTVL); 585 case LINUX_TCP_KEEPCNT: 586 return (TCP_KEEPCNT); 587 case LINUX_TCP_INFO: 588 LINUX_RATELIMIT_MSG_OPT1( 589 "unsupported TCP socket option TCP_INFO (%d)", opt); 590 return (-2); 591 case LINUX_TCP_MD5SIG: 592 return (TCP_MD5SIG); 593 } 594 return (-1); 595 } 596 597 static int 598 linux_to_bsd_msg_flags(int flags) 599 { 600 int ret_flags = 0; 601 602 if (flags & LINUX_MSG_OOB) 603 ret_flags |= MSG_OOB; 604 if (flags & LINUX_MSG_PEEK) 605 ret_flags |= MSG_PEEK; 606 if (flags & LINUX_MSG_DONTROUTE) 607 ret_flags |= MSG_DONTROUTE; 608 if (flags & LINUX_MSG_CTRUNC) 609 ret_flags |= MSG_CTRUNC; 610 if (flags & LINUX_MSG_TRUNC) 611 ret_flags |= MSG_TRUNC; 612 if (flags & LINUX_MSG_DONTWAIT) 613 ret_flags |= MSG_DONTWAIT; 614 if (flags & LINUX_MSG_EOR) 615 ret_flags |= MSG_EOR; 616 if (flags & LINUX_MSG_WAITALL) 617 ret_flags |= MSG_WAITALL; 618 if (flags & LINUX_MSG_NOSIGNAL) 619 ret_flags |= MSG_NOSIGNAL; 620 if (flags & LINUX_MSG_PROXY) 621 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_PROXY (%d) not handled", 622 LINUX_MSG_PROXY); 623 if (flags & LINUX_MSG_FIN) 624 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_FIN (%d) not handled", 625 LINUX_MSG_FIN); 626 if (flags & LINUX_MSG_SYN) 627 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_SYN (%d) not handled", 628 LINUX_MSG_SYN); 629 if (flags & LINUX_MSG_CONFIRM) 630 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_CONFIRM (%d) not handled", 631 LINUX_MSG_CONFIRM); 632 if (flags & LINUX_MSG_RST) 633 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_RST (%d) not handled", 634 LINUX_MSG_RST); 635 if (flags & LINUX_MSG_ERRQUEUE) 636 LINUX_RATELIMIT_MSG_OPT1("socket message flag MSG_ERRQUEUE (%d) not handled", 637 LINUX_MSG_ERRQUEUE); 638 return (ret_flags); 639 } 640 641 static int 642 linux_to_bsd_cmsg_type(int cmsg_type) 643 { 644 645 switch (cmsg_type) { 646 case LINUX_SCM_RIGHTS: 647 return (SCM_RIGHTS); 648 case LINUX_SCM_CREDENTIALS: 649 return (SCM_CREDS); 650 } 651 return (-1); 652 } 653 654 static int 655 bsd_to_linux_ip_cmsg_type(int cmsg_type) 656 { 657 658 switch (cmsg_type) { 659 case IP_RECVORIGDSTADDR: 660 return (LINUX_IP_RECVORIGDSTADDR); 661 } 662 return (-1); 663 } 664 665 static int 666 bsd_to_linux_cmsg_type(struct proc *p, int cmsg_type, int cmsg_level) 667 { 668 struct linux_pemuldata *pem; 669 670 if (cmsg_level == IPPROTO_IP) 671 return (bsd_to_linux_ip_cmsg_type(cmsg_type)); 672 if (cmsg_level != SOL_SOCKET) 673 return (-1); 674 675 pem = pem_find(p); 676 677 switch (cmsg_type) { 678 case SCM_RIGHTS: 679 return (LINUX_SCM_RIGHTS); 680 case SCM_CREDS: 681 return (LINUX_SCM_CREDENTIALS); 682 case SCM_CREDS2: 683 return (LINUX_SCM_CREDENTIALS); 684 case SCM_TIMESTAMP: 685 return (pem->so_timestamp); 686 case SCM_BINTIME: 687 return (pem->so_timestampns); 688 } 689 return (-1); 690 } 691 692 static int 693 linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) 694 { 695 if (lhdr->msg_controllen > INT_MAX) 696 return (ENOBUFS); 697 698 bhdr->msg_name = PTRIN(lhdr->msg_name); 699 bhdr->msg_namelen = lhdr->msg_namelen; 700 bhdr->msg_iov = PTRIN(lhdr->msg_iov); 701 bhdr->msg_iovlen = lhdr->msg_iovlen; 702 bhdr->msg_control = PTRIN(lhdr->msg_control); 703 704 /* 705 * msg_controllen is skipped since BSD and LINUX control messages 706 * are potentially different sizes (e.g. the cred structure used 707 * by SCM_CREDS is different between the two operating system). 708 * 709 * The caller can set it (if necessary) after converting all the 710 * control messages. 711 */ 712 713 bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); 714 return (0); 715 } 716 717 static int 718 bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) 719 { 720 lhdr->msg_name = PTROUT(bhdr->msg_name); 721 lhdr->msg_namelen = bhdr->msg_namelen; 722 lhdr->msg_iov = PTROUT(bhdr->msg_iov); 723 lhdr->msg_iovlen = bhdr->msg_iovlen; 724 lhdr->msg_control = PTROUT(bhdr->msg_control); 725 726 /* 727 * msg_controllen is skipped since BSD and LINUX control messages 728 * are potentially different sizes (e.g. the cred structure used 729 * by SCM_CREDS is different between the two operating system). 730 * 731 * The caller can set it (if necessary) after converting all the 732 * control messages. 733 */ 734 735 /* msg_flags skipped */ 736 return (0); 737 } 738 739 static int 740 linux_set_socket_flags(int lflags, int *flags) 741 { 742 743 if (lflags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) 744 return (EINVAL); 745 if (lflags & LINUX_SOCK_NONBLOCK) 746 *flags |= SOCK_NONBLOCK; 747 if (lflags & LINUX_SOCK_CLOEXEC) 748 *flags |= SOCK_CLOEXEC; 749 return (0); 750 } 751 752 static int 753 linux_copyout_sockaddr(const struct sockaddr *sa, void *uaddr, size_t len) 754 { 755 struct l_sockaddr *lsa; 756 int error; 757 758 error = bsd_to_linux_sockaddr(sa, &lsa, len); 759 if (error != 0) 760 return (error); 761 762 error = copyout(lsa, uaddr, len); 763 free(lsa, M_LINUX); 764 765 return (error); 766 } 767 768 static int 769 linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, 770 struct mbuf *control, enum uio_seg segflg) 771 { 772 struct sockaddr *to; 773 int error, len; 774 775 if (mp->msg_name != NULL) { 776 len = mp->msg_namelen; 777 error = linux_to_bsd_sockaddr(mp->msg_name, &to, &len); 778 if (error != 0) 779 return (error); 780 mp->msg_name = to; 781 } else 782 to = NULL; 783 784 error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, 785 segflg); 786 787 if (to) 788 free(to, M_SONAME); 789 return (error); 790 } 791 792 /* Return 0 if IP_HDRINCL is set for the given socket. */ 793 static int 794 linux_check_hdrincl(struct thread *td, int s) 795 { 796 int error, optval; 797 socklen_t size_val; 798 799 size_val = sizeof(optval); 800 error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, 801 &optval, UIO_SYSSPACE, &size_val); 802 if (error != 0) 803 return (error); 804 805 return (optval == 0); 806 } 807 808 /* 809 * Updated sendto() when IP_HDRINCL is set: 810 * tweak endian-dependent fields in the IP packet. 811 */ 812 static int 813 linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) 814 { 815 /* 816 * linux_ip_copysize defines how many bytes we should copy 817 * from the beginning of the IP packet before we customize it for BSD. 818 * It should include all the fields we modify (ip_len and ip_off). 819 */ 820 #define linux_ip_copysize 8 821 822 struct ip *packet; 823 struct msghdr msg; 824 struct iovec aiov[1]; 825 int error; 826 827 /* Check that the packet isn't too big or too small. */ 828 if (linux_args->len < linux_ip_copysize || 829 linux_args->len > IP_MAXPACKET) 830 return (EINVAL); 831 832 packet = (struct ip *)malloc(linux_args->len, M_LINUX, M_WAITOK); 833 834 /* Make kernel copy of the packet to be sent */ 835 if ((error = copyin(PTRIN(linux_args->msg), packet, 836 linux_args->len))) 837 goto goout; 838 839 /* Convert fields from Linux to BSD raw IP socket format */ 840 packet->ip_len = linux_args->len; 841 packet->ip_off = ntohs(packet->ip_off); 842 843 /* Prepare the msghdr and iovec structures describing the new packet */ 844 msg.msg_name = PTRIN(linux_args->to); 845 msg.msg_namelen = linux_args->tolen; 846 msg.msg_iov = aiov; 847 msg.msg_iovlen = 1; 848 msg.msg_control = NULL; 849 msg.msg_flags = 0; 850 aiov[0].iov_base = (char *)packet; 851 aiov[0].iov_len = linux_args->len; 852 error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, 853 NULL, UIO_SYSSPACE); 854 goout: 855 free(packet, M_LINUX); 856 return (error); 857 } 858 859 static const char *linux_netlink_names[] = { 860 [LINUX_NETLINK_ROUTE] = "ROUTE", 861 [LINUX_NETLINK_SOCK_DIAG] = "SOCK_DIAG", 862 [LINUX_NETLINK_NFLOG] = "NFLOG", 863 [LINUX_NETLINK_SELINUX] = "SELINUX", 864 [LINUX_NETLINK_AUDIT] = "AUDIT", 865 [LINUX_NETLINK_FIB_LOOKUP] = "FIB_LOOKUP", 866 [LINUX_NETLINK_NETFILTER] = "NETFILTER", 867 [LINUX_NETLINK_KOBJECT_UEVENT] = "KOBJECT_UEVENT", 868 }; 869 870 int 871 linux_socket(struct thread *td, struct linux_socket_args *args) 872 { 873 int domain, retval_socket, type; 874 875 type = args->type & LINUX_SOCK_TYPE_MASK; 876 if (type < 0 || type > LINUX_SOCK_MAX) 877 return (EINVAL); 878 retval_socket = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 879 &type); 880 if (retval_socket != 0) 881 return (retval_socket); 882 domain = linux_to_bsd_domain(args->domain); 883 if (domain == -1) { 884 /* Mask off SOCK_NONBLOCK / CLOEXEC for error messages. */ 885 type = args->type & LINUX_SOCK_TYPE_MASK; 886 if (args->domain == LINUX_AF_NETLINK && 887 args->protocol == LINUX_NETLINK_AUDIT) { 888 ; /* Do nothing, quietly. */ 889 } else if (args->domain == LINUX_AF_NETLINK) { 890 const char *nl_name; 891 892 if (args->protocol >= 0 && 893 args->protocol < nitems(linux_netlink_names)) 894 nl_name = linux_netlink_names[args->protocol]; 895 else 896 nl_name = NULL; 897 if (nl_name != NULL) 898 linux_msg(curthread, 899 "unsupported socket(AF_NETLINK, %d, " 900 "NETLINK_%s)", type, nl_name); 901 else 902 linux_msg(curthread, 903 "unsupported socket(AF_NETLINK, %d, %d)", 904 type, args->protocol); 905 } else { 906 linux_msg(curthread, "unsupported socket domain %d, " 907 "type %d, protocol %d", args->domain, type, 908 args->protocol); 909 } 910 return (EAFNOSUPPORT); 911 } 912 913 retval_socket = kern_socket(td, domain, type, args->protocol); 914 if (retval_socket) 915 return (retval_socket); 916 917 if (type == SOCK_RAW 918 && (args->protocol == IPPROTO_RAW || args->protocol == 0) 919 && domain == PF_INET) { 920 /* It's a raw IP socket: set the IP_HDRINCL option. */ 921 int hdrincl; 922 923 hdrincl = 1; 924 /* We ignore any error returned by kern_setsockopt() */ 925 kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, 926 &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); 927 } 928 #ifdef INET6 929 /* 930 * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default 931 * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. 932 * For simplicity we do this unconditionally of the net.inet6.ip6.v6only 933 * sysctl value. 934 */ 935 if (domain == PF_INET6) { 936 int v6only; 937 938 v6only = 0; 939 /* We ignore any error returned by setsockopt() */ 940 kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, 941 &v6only, UIO_SYSSPACE, sizeof(v6only)); 942 } 943 #endif 944 945 return (retval_socket); 946 } 947 948 int 949 linux_bind(struct thread *td, struct linux_bind_args *args) 950 { 951 struct sockaddr *sa; 952 int error; 953 954 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, 955 &args->namelen); 956 if (error != 0) 957 return (error); 958 959 error = kern_bindat(td, AT_FDCWD, args->s, sa); 960 free(sa, M_SONAME); 961 962 /* XXX */ 963 if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) 964 return (EINVAL); 965 return (error); 966 } 967 968 int 969 linux_connect(struct thread *td, struct linux_connect_args *args) 970 { 971 struct socket *so; 972 struct sockaddr *sa; 973 struct file *fp; 974 int error; 975 976 error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, 977 &args->namelen); 978 if (error != 0) 979 return (error); 980 981 error = kern_connectat(td, AT_FDCWD, args->s, sa); 982 free(sa, M_SONAME); 983 if (error != EISCONN) 984 return (error); 985 986 /* 987 * Linux doesn't return EISCONN the first time it occurs, 988 * when on a non-blocking socket. Instead it returns the 989 * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. 990 */ 991 error = getsock(td, args->s, &cap_connect_rights, &fp); 992 if (error != 0) 993 return (error); 994 995 error = EISCONN; 996 so = fp->f_data; 997 if (atomic_load_int(&fp->f_flag) & FNONBLOCK) { 998 SOCK_LOCK(so); 999 if (so->so_emuldata == 0) 1000 error = so->so_error; 1001 so->so_emuldata = (void *)1; 1002 SOCK_UNLOCK(so); 1003 } 1004 fdrop(fp, td); 1005 1006 return (error); 1007 } 1008 1009 int 1010 linux_listen(struct thread *td, struct linux_listen_args *args) 1011 { 1012 1013 return (kern_listen(td, args->s, args->backlog)); 1014 } 1015 1016 static int 1017 linux_accept_common(struct thread *td, int s, l_uintptr_t addr, 1018 l_uintptr_t namelen, int flags) 1019 { 1020 struct sockaddr_storage ss = { .ss_len = sizeof(ss) }; 1021 struct file *fp, *fp1; 1022 struct socket *so; 1023 socklen_t len; 1024 int bflags, error, error1; 1025 1026 bflags = 0; 1027 fp = NULL; 1028 1029 error = linux_set_socket_flags(flags, &bflags); 1030 if (error != 0) 1031 return (error); 1032 1033 if (PTRIN(addr) != NULL) { 1034 error = copyin(PTRIN(namelen), &len, sizeof(len)); 1035 if (error != 0) 1036 return (error); 1037 if (len < 0) 1038 return (EINVAL); 1039 } else 1040 len = 0; 1041 1042 error = kern_accept4(td, s, (struct sockaddr *)&ss, bflags, &fp); 1043 1044 /* 1045 * Translate errno values into ones used by Linux. 1046 */ 1047 if (error != 0) { 1048 /* 1049 * XXX. This is wrong, different sockaddr structures 1050 * have different sizes. 1051 */ 1052 switch (error) { 1053 case EFAULT: 1054 if (namelen != sizeof(struct sockaddr_in)) 1055 error = EINVAL; 1056 break; 1057 case EINVAL: 1058 error1 = getsock(td, s, &cap_accept_rights, &fp1); 1059 if (error1 != 0) { 1060 error = error1; 1061 break; 1062 } 1063 so = fp1->f_data; 1064 if (so->so_type == SOCK_DGRAM) 1065 error = EOPNOTSUPP; 1066 fdrop(fp1, td); 1067 break; 1068 } 1069 return (error); 1070 } 1071 1072 if (PTRIN(addr) != NULL) { 1073 len = min(ss.ss_len, len); 1074 error = linux_copyout_sockaddr((struct sockaddr *)&ss, 1075 PTRIN(addr), len); 1076 if (error == 0) { 1077 len = ss.ss_len; 1078 error = copyout(&len, PTRIN(namelen), sizeof(len)); 1079 } 1080 if (error != 0) { 1081 fdclose(td, fp, td->td_retval[0]); 1082 td->td_retval[0] = 0; 1083 } 1084 } 1085 if (fp != NULL) 1086 fdrop(fp, td); 1087 return (error); 1088 } 1089 1090 int 1091 linux_accept(struct thread *td, struct linux_accept_args *args) 1092 { 1093 1094 return (linux_accept_common(td, args->s, args->addr, 1095 args->namelen, 0)); 1096 } 1097 1098 int 1099 linux_accept4(struct thread *td, struct linux_accept4_args *args) 1100 { 1101 1102 return (linux_accept_common(td, args->s, args->addr, 1103 args->namelen, args->flags)); 1104 } 1105 1106 int 1107 linux_getsockname(struct thread *td, struct linux_getsockname_args *args) 1108 { 1109 struct sockaddr_storage ss = { .ss_len = sizeof(ss) }; 1110 socklen_t len; 1111 int error; 1112 1113 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 1114 if (error != 0) 1115 return (error); 1116 1117 error = kern_getsockname(td, args->s, (struct sockaddr *)&ss); 1118 if (error != 0) 1119 return (error); 1120 1121 len = min(ss.ss_len, len); 1122 error = linux_copyout_sockaddr((struct sockaddr *)&ss, 1123 PTRIN(args->addr), len); 1124 if (error == 0) { 1125 len = ss.ss_len; 1126 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 1127 } 1128 return (error); 1129 } 1130 1131 int 1132 linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 1133 { 1134 struct sockaddr_storage ss = { .ss_len = sizeof(ss) }; 1135 socklen_t len; 1136 int error; 1137 1138 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 1139 if (error != 0) 1140 return (error); 1141 1142 error = kern_getpeername(td, args->s, (struct sockaddr *)&ss); 1143 if (error != 0) 1144 return (error); 1145 1146 len = min(ss.ss_len, len); 1147 error = linux_copyout_sockaddr((struct sockaddr *)&ss, 1148 PTRIN(args->addr), len); 1149 if (error == 0) { 1150 len = ss.ss_len; 1151 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 1152 } 1153 return (error); 1154 } 1155 1156 int 1157 linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 1158 { 1159 int domain, error, sv[2], type; 1160 1161 domain = linux_to_bsd_domain(args->domain); 1162 if (domain != PF_LOCAL) 1163 return (EAFNOSUPPORT); 1164 type = args->type & LINUX_SOCK_TYPE_MASK; 1165 if (type < 0 || type > LINUX_SOCK_MAX) 1166 return (EINVAL); 1167 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 1168 &type); 1169 if (error != 0) 1170 return (error); 1171 if (args->protocol != 0 && args->protocol != PF_UNIX) { 1172 /* 1173 * Use of PF_UNIX as protocol argument is not right, 1174 * but Linux does it. 1175 * Do not map PF_UNIX as its Linux value is identical 1176 * to FreeBSD one. 1177 */ 1178 return (EPROTONOSUPPORT); 1179 } 1180 error = kern_socketpair(td, domain, type, 0, sv); 1181 if (error != 0) 1182 return (error); 1183 error = copyout(sv, PTRIN(args->rsv), 2 * sizeof(int)); 1184 if (error != 0) { 1185 (void)kern_close(td, sv[0]); 1186 (void)kern_close(td, sv[1]); 1187 } 1188 return (error); 1189 } 1190 1191 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1192 struct linux_send_args { 1193 register_t s; 1194 register_t msg; 1195 register_t len; 1196 register_t flags; 1197 }; 1198 1199 static int 1200 linux_send(struct thread *td, struct linux_send_args *args) 1201 { 1202 struct sendto_args /* { 1203 int s; 1204 caddr_t buf; 1205 int len; 1206 int flags; 1207 caddr_t to; 1208 int tolen; 1209 } */ bsd_args; 1210 struct file *fp; 1211 int error; 1212 1213 bsd_args.s = args->s; 1214 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1215 bsd_args.len = args->len; 1216 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1217 bsd_args.to = NULL; 1218 bsd_args.tolen = 0; 1219 error = sys_sendto(td, &bsd_args); 1220 if (error == ENOTCONN) { 1221 /* 1222 * Linux doesn't return ENOTCONN for non-blocking sockets. 1223 * Instead it returns the EAGAIN. 1224 */ 1225 error = getsock(td, args->s, &cap_send_rights, &fp); 1226 if (error == 0) { 1227 if (atomic_load_int(&fp->f_flag) & FNONBLOCK) 1228 error = EAGAIN; 1229 fdrop(fp, td); 1230 } 1231 } 1232 return (error); 1233 } 1234 1235 struct linux_recv_args { 1236 register_t s; 1237 register_t msg; 1238 register_t len; 1239 register_t flags; 1240 }; 1241 1242 static int 1243 linux_recv(struct thread *td, struct linux_recv_args *args) 1244 { 1245 struct recvfrom_args /* { 1246 int s; 1247 caddr_t buf; 1248 int len; 1249 int flags; 1250 struct sockaddr *from; 1251 socklen_t fromlenaddr; 1252 } */ bsd_args; 1253 1254 bsd_args.s = args->s; 1255 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1256 bsd_args.len = args->len; 1257 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1258 bsd_args.from = NULL; 1259 bsd_args.fromlenaddr = 0; 1260 return (sys_recvfrom(td, &bsd_args)); 1261 } 1262 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1263 1264 int 1265 linux_sendto(struct thread *td, struct linux_sendto_args *args) 1266 { 1267 struct msghdr msg; 1268 struct iovec aiov; 1269 struct socket *so; 1270 struct file *fp; 1271 int error; 1272 1273 if (linux_check_hdrincl(td, args->s) == 0) 1274 /* IP_HDRINCL set, tweak the packet before sending */ 1275 return (linux_sendto_hdrincl(td, args)); 1276 1277 bzero(&msg, sizeof(msg)); 1278 error = getsock(td, args->s, &cap_send_connect_rights, &fp); 1279 if (error != 0) 1280 return (error); 1281 so = fp->f_data; 1282 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0) { 1283 msg.msg_name = PTRIN(args->to); 1284 msg.msg_namelen = args->tolen; 1285 } 1286 msg.msg_iov = &aiov; 1287 msg.msg_iovlen = 1; 1288 aiov.iov_base = PTRIN(args->msg); 1289 aiov.iov_len = args->len; 1290 fdrop(fp, td); 1291 return (linux_sendit(td, args->s, &msg, args->flags, NULL, 1292 UIO_USERSPACE)); 1293 } 1294 1295 int 1296 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1297 { 1298 struct sockaddr *sa; 1299 struct msghdr msg; 1300 struct iovec aiov; 1301 int error, fromlen; 1302 1303 if (PTRIN(args->fromlen) != NULL) { 1304 error = copyin(PTRIN(args->fromlen), &fromlen, 1305 sizeof(fromlen)); 1306 if (error != 0) 1307 return (error); 1308 if (fromlen < 0) 1309 return (EINVAL); 1310 fromlen = min(fromlen, SOCK_MAXADDRLEN); 1311 sa = malloc(fromlen, M_SONAME, M_WAITOK); 1312 } else { 1313 fromlen = 0; 1314 sa = NULL; 1315 } 1316 1317 msg.msg_name = sa; 1318 msg.msg_namelen = fromlen; 1319 msg.msg_iov = &aiov; 1320 msg.msg_iovlen = 1; 1321 aiov.iov_base = PTRIN(args->buf); 1322 aiov.iov_len = args->len; 1323 msg.msg_control = 0; 1324 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1325 1326 error = kern_recvit(td, args->s, &msg, UIO_SYSSPACE, NULL); 1327 if (error != 0) 1328 goto out; 1329 1330 /* 1331 * XXX. Seems that FreeBSD is different from Linux here. Linux 1332 * fill source address if underlying protocol provides it, while 1333 * FreeBSD fill it if underlying protocol is not connection-oriented. 1334 * So, kern_recvit() set msg.msg_namelen to 0 if protocol pr_flags 1335 * does not contains PR_ADDR flag. 1336 */ 1337 if (PTRIN(args->from) != NULL && msg.msg_namelen != 0) 1338 error = linux_copyout_sockaddr(sa, PTRIN(args->from), 1339 msg.msg_namelen); 1340 1341 if (error == 0 && PTRIN(args->fromlen) != NULL) 1342 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1343 sizeof(msg.msg_namelen)); 1344 out: 1345 free(sa, M_SONAME); 1346 return (error); 1347 } 1348 1349 static int 1350 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1351 l_uint flags) 1352 { 1353 struct sockaddr_storage ss = { .ss_len = sizeof(ss) }; 1354 struct cmsghdr *cmsg; 1355 struct mbuf *control; 1356 struct msghdr msg; 1357 struct l_cmsghdr linux_cmsg; 1358 struct l_cmsghdr *ptr_cmsg; 1359 struct l_msghdr linux_msghdr; 1360 struct iovec *iov; 1361 socklen_t datalen; 1362 struct socket *so; 1363 sa_family_t sa_family; 1364 struct file *fp; 1365 void *data; 1366 l_size_t len; 1367 l_size_t clen; 1368 int error; 1369 1370 error = copyin(msghdr, &linux_msghdr, sizeof(linux_msghdr)); 1371 if (error != 0) 1372 return (error); 1373 1374 /* 1375 * Some Linux applications (ping) define a non-NULL control data 1376 * pointer, but a msg_controllen of 0, which is not allowed in the 1377 * FreeBSD system call interface. NULL the msg_control pointer in 1378 * order to handle this case. This should be checked, but allows the 1379 * Linux ping to work. 1380 */ 1381 if (PTRIN(linux_msghdr.msg_control) != NULL && 1382 linux_msghdr.msg_controllen == 0) 1383 linux_msghdr.msg_control = PTROUT(NULL); 1384 1385 error = linux_to_bsd_msghdr(&msg, &linux_msghdr); 1386 if (error != 0) 1387 return (error); 1388 1389 #ifdef COMPAT_LINUX32 1390 error = freebsd32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1391 &iov, EMSGSIZE); 1392 #else 1393 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1394 #endif 1395 if (error != 0) 1396 return (error); 1397 1398 control = NULL; 1399 1400 error = kern_getsockname(td, s, (struct sockaddr *)&ss); 1401 if (error != 0) 1402 goto bad; 1403 sa_family = ss.ss_family; 1404 1405 if (flags & LINUX_MSG_OOB) { 1406 error = EOPNOTSUPP; 1407 if (sa_family == AF_UNIX) 1408 goto bad; 1409 1410 error = getsock(td, s, &cap_send_rights, &fp); 1411 if (error != 0) 1412 goto bad; 1413 so = fp->f_data; 1414 if (so->so_type != SOCK_STREAM) 1415 error = EOPNOTSUPP; 1416 fdrop(fp, td); 1417 if (error != 0) 1418 goto bad; 1419 } 1420 1421 if (linux_msghdr.msg_controllen >= sizeof(struct l_cmsghdr)) { 1422 error = ENOBUFS; 1423 control = m_get(M_WAITOK, MT_CONTROL); 1424 MCLGET(control, M_WAITOK); 1425 data = mtod(control, void *); 1426 datalen = 0; 1427 1428 ptr_cmsg = PTRIN(linux_msghdr.msg_control); 1429 clen = linux_msghdr.msg_controllen; 1430 do { 1431 error = copyin(ptr_cmsg, &linux_cmsg, 1432 sizeof(struct l_cmsghdr)); 1433 if (error != 0) 1434 goto bad; 1435 1436 error = EINVAL; 1437 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr) || 1438 linux_cmsg.cmsg_len > clen) 1439 goto bad; 1440 1441 if (datalen + CMSG_HDRSZ > MCLBYTES) 1442 goto bad; 1443 1444 /* 1445 * Now we support only SCM_RIGHTS and SCM_CRED, 1446 * so return EINVAL in any other cmsg_type 1447 */ 1448 cmsg = data; 1449 cmsg->cmsg_type = 1450 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1451 cmsg->cmsg_level = 1452 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1453 if (cmsg->cmsg_type == -1 1454 || cmsg->cmsg_level != SOL_SOCKET) { 1455 linux_msg(curthread, 1456 "unsupported sendmsg cmsg level %d type %d", 1457 linux_cmsg.cmsg_level, linux_cmsg.cmsg_type); 1458 goto bad; 1459 } 1460 1461 /* 1462 * Some applications (e.g. pulseaudio) attempt to 1463 * send ancillary data even if the underlying protocol 1464 * doesn't support it which is not allowed in the 1465 * FreeBSD system call interface. 1466 */ 1467 if (sa_family != AF_UNIX) 1468 goto next; 1469 1470 if (cmsg->cmsg_type == SCM_CREDS) { 1471 len = sizeof(struct cmsgcred); 1472 if (datalen + CMSG_SPACE(len) > MCLBYTES) 1473 goto bad; 1474 1475 /* 1476 * The lower levels will fill in the structure 1477 */ 1478 memset(CMSG_DATA(data), 0, len); 1479 } else { 1480 len = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1481 if (datalen + CMSG_SPACE(len) < datalen || 1482 datalen + CMSG_SPACE(len) > MCLBYTES) 1483 goto bad; 1484 1485 error = copyin(LINUX_CMSG_DATA(ptr_cmsg), 1486 CMSG_DATA(data), len); 1487 if (error != 0) 1488 goto bad; 1489 } 1490 1491 cmsg->cmsg_len = CMSG_LEN(len); 1492 data = (char *)data + CMSG_SPACE(len); 1493 datalen += CMSG_SPACE(len); 1494 1495 next: 1496 if (clen <= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)) 1497 break; 1498 1499 clen -= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len); 1500 ptr_cmsg = (struct l_cmsghdr *)((char *)ptr_cmsg + 1501 LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)); 1502 } while(clen >= sizeof(struct l_cmsghdr)); 1503 1504 control->m_len = datalen; 1505 if (datalen == 0) { 1506 m_freem(control); 1507 control = NULL; 1508 } 1509 } 1510 1511 msg.msg_iov = iov; 1512 msg.msg_flags = 0; 1513 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1514 control = NULL; 1515 1516 bad: 1517 m_freem(control); 1518 free(iov, M_IOV); 1519 return (error); 1520 } 1521 1522 int 1523 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1524 { 1525 1526 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1527 args->flags)); 1528 } 1529 1530 int 1531 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1532 { 1533 struct l_mmsghdr *msg; 1534 l_uint retval; 1535 int error, datagrams; 1536 1537 if (args->vlen > UIO_MAXIOV) 1538 args->vlen = UIO_MAXIOV; 1539 1540 msg = PTRIN(args->msg); 1541 datagrams = 0; 1542 while (datagrams < args->vlen) { 1543 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1544 args->flags); 1545 if (error != 0) 1546 break; 1547 1548 retval = td->td_retval[0]; 1549 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1550 if (error != 0) 1551 break; 1552 ++msg; 1553 ++datagrams; 1554 } 1555 if (error == 0) 1556 td->td_retval[0] = datagrams; 1557 return (error); 1558 } 1559 1560 static int 1561 recvmsg_scm_rights(struct thread *td, l_uint flags, socklen_t *datalen, 1562 void **data, void **udata) 1563 { 1564 int i, fd, fds, *fdp; 1565 1566 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1567 fds = *datalen / sizeof(int); 1568 fdp = *data; 1569 for (i = 0; i < fds; i++) { 1570 fd = *fdp++; 1571 (void)kern_fcntl(td, fd, F_SETFD, FD_CLOEXEC); 1572 } 1573 } 1574 return (0); 1575 } 1576 1577 1578 static int 1579 recvmsg_scm_creds(socklen_t *datalen, void **data, void **udata) 1580 { 1581 struct cmsgcred *cmcred; 1582 struct l_ucred lu; 1583 1584 cmcred = *data; 1585 lu.pid = cmcred->cmcred_pid; 1586 lu.uid = cmcred->cmcred_uid; 1587 lu.gid = cmcred->cmcred_gid; 1588 memmove(*data, &lu, sizeof(lu)); 1589 *datalen = sizeof(lu); 1590 return (0); 1591 } 1592 _Static_assert(sizeof(struct cmsgcred) >= sizeof(struct l_ucred), 1593 "scm_creds sizeof l_ucred"); 1594 1595 static int 1596 recvmsg_scm_creds2(socklen_t *datalen, void **data, void **udata) 1597 { 1598 struct sockcred2 *scred; 1599 struct l_ucred lu; 1600 1601 scred = *data; 1602 lu.pid = scred->sc_pid; 1603 lu.uid = scred->sc_uid; 1604 lu.gid = scred->sc_gid; 1605 memmove(*data, &lu, sizeof(lu)); 1606 *datalen = sizeof(lu); 1607 return (0); 1608 } 1609 _Static_assert(sizeof(struct sockcred2) >= sizeof(struct l_ucred), 1610 "scm_creds2 sizeof l_ucred"); 1611 1612 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1613 static int 1614 recvmsg_scm_timestamp(l_int msg_type, socklen_t *datalen, void **data, 1615 void **udata) 1616 { 1617 l_sock_timeval ltv64; 1618 l_timeval ltv; 1619 struct timeval *tv; 1620 socklen_t len; 1621 void *buf; 1622 1623 if (*datalen != sizeof(struct timeval)) 1624 return (EMSGSIZE); 1625 1626 tv = *data; 1627 #if defined(COMPAT_LINUX32) 1628 if (msg_type == LINUX_SCM_TIMESTAMPO && 1629 (tv->tv_sec > INT_MAX || tv->tv_sec < INT_MIN)) 1630 return (EOVERFLOW); 1631 #endif 1632 if (msg_type == LINUX_SCM_TIMESTAMPN) 1633 len = sizeof(ltv64); 1634 else 1635 len = sizeof(ltv); 1636 1637 buf = malloc(len, M_LINUX, M_WAITOK); 1638 if (msg_type == LINUX_SCM_TIMESTAMPN) { 1639 ltv64.tv_sec = tv->tv_sec; 1640 ltv64.tv_usec = tv->tv_usec; 1641 memmove(buf, <v64, len); 1642 } else { 1643 ltv.tv_sec = tv->tv_sec; 1644 ltv.tv_usec = tv->tv_usec; 1645 memmove(buf, <v, len); 1646 } 1647 *data = *udata = buf; 1648 *datalen = len; 1649 return (0); 1650 } 1651 #else 1652 _Static_assert(sizeof(struct timeval) == sizeof(l_timeval), 1653 "scm_timestamp sizeof l_timeval"); 1654 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1655 1656 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1657 static int 1658 recvmsg_scm_timestampns(l_int msg_type, socklen_t *datalen, void **data, 1659 void **udata) 1660 { 1661 struct l_timespec64 ts64; 1662 struct l_timespec ts32; 1663 struct timespec ts; 1664 socklen_t len; 1665 void *buf; 1666 1667 if (msg_type == LINUX_SCM_TIMESTAMPNSO) 1668 len = sizeof(ts32); 1669 else 1670 len = sizeof(ts64); 1671 1672 buf = malloc(len, M_LINUX, M_WAITOK); 1673 bintime2timespec(*data, &ts); 1674 if (msg_type == LINUX_SCM_TIMESTAMPNSO) { 1675 ts32.tv_sec = ts.tv_sec; 1676 ts32.tv_nsec = ts.tv_nsec; 1677 memmove(buf, &ts32, len); 1678 } else { 1679 ts64.tv_sec = ts.tv_sec; 1680 ts64.tv_nsec = ts.tv_nsec; 1681 memmove(buf, &ts64, len); 1682 } 1683 *data = *udata = buf; 1684 *datalen = len; 1685 return (0); 1686 } 1687 #else 1688 static int 1689 recvmsg_scm_timestampns(l_int msg_type, socklen_t *datalen, void **data, 1690 void **udata) 1691 { 1692 struct timespec ts; 1693 1694 bintime2timespec(*data, &ts); 1695 memmove(*data, &ts, sizeof(struct timespec)); 1696 *datalen = sizeof(struct timespec); 1697 return (0); 1698 } 1699 _Static_assert(sizeof(struct bintime) >= sizeof(struct timespec), 1700 "scm_timestampns sizeof timespec"); 1701 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1702 1703 static int 1704 recvmsg_scm_sol_socket(struct thread *td, l_int msg_type, l_int lmsg_type, 1705 l_uint flags, socklen_t *datalen, void **data, void **udata) 1706 { 1707 int error; 1708 1709 error = 0; 1710 switch (msg_type) { 1711 case SCM_RIGHTS: 1712 error = recvmsg_scm_rights(td, flags, datalen, 1713 data, udata); 1714 break; 1715 case SCM_CREDS: 1716 error = recvmsg_scm_creds(datalen, data, udata); 1717 break; 1718 case SCM_CREDS2: 1719 error = recvmsg_scm_creds2(datalen, data, udata); 1720 break; 1721 case SCM_TIMESTAMP: 1722 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1723 error = recvmsg_scm_timestamp(lmsg_type, datalen, 1724 data, udata); 1725 #endif 1726 break; 1727 case SCM_BINTIME: 1728 error = recvmsg_scm_timestampns(lmsg_type, datalen, 1729 data, udata); 1730 break; 1731 } 1732 1733 return (error); 1734 } 1735 1736 static int 1737 recvmsg_scm_ip_origdstaddr(socklen_t *datalen, void **data, void **udata) 1738 { 1739 struct l_sockaddr *lsa; 1740 int error; 1741 1742 error = bsd_to_linux_sockaddr(*data, &lsa, *datalen); 1743 if (error == 0) { 1744 *data = *udata = lsa; 1745 *datalen = sizeof(*lsa); 1746 } 1747 return (error); 1748 } 1749 1750 static int 1751 recvmsg_scm_ipproto_ip(l_int msg_type, l_int lmsg_type, socklen_t *datalen, 1752 void **data, void **udata) 1753 { 1754 int error; 1755 1756 error = 0; 1757 switch (msg_type) { 1758 case IP_ORIGDSTADDR: 1759 error = recvmsg_scm_ip_origdstaddr(datalen, data, 1760 udata); 1761 break; 1762 } 1763 1764 return (error); 1765 } 1766 1767 static int 1768 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1769 l_uint flags, struct msghdr *msg) 1770 { 1771 struct proc *p = td->td_proc; 1772 struct cmsghdr *cm; 1773 struct l_cmsghdr *lcm = NULL; 1774 socklen_t datalen, maxlen, outlen; 1775 struct l_msghdr l_msghdr; 1776 struct iovec *iov, *uiov; 1777 struct mbuf *m, *control = NULL; 1778 struct mbuf **controlp; 1779 struct sockaddr *sa; 1780 caddr_t outbuf; 1781 void *data, *udata; 1782 int error, skiped; 1783 1784 error = copyin(msghdr, &l_msghdr, sizeof(l_msghdr)); 1785 if (error != 0) 1786 return (error); 1787 1788 /* 1789 * Pass user-supplied recvmsg() flags in msg_flags field, 1790 * following sys_recvmsg() convention. 1791 */ 1792 l_msghdr.msg_flags = flags; 1793 1794 error = linux_to_bsd_msghdr(msg, &l_msghdr); 1795 if (error != 0) 1796 return (error); 1797 1798 #ifdef COMPAT_LINUX32 1799 error = freebsd32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1800 &iov, EMSGSIZE); 1801 #else 1802 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1803 #endif 1804 if (error != 0) 1805 return (error); 1806 1807 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1808 msg->msg_namelen = min(msg->msg_namelen, SOCK_MAXADDRLEN); 1809 sa = malloc(msg->msg_namelen, M_SONAME, M_WAITOK); 1810 msg->msg_name = sa; 1811 } else { 1812 sa = NULL; 1813 msg->msg_name = NULL; 1814 } 1815 1816 uiov = msg->msg_iov; 1817 msg->msg_iov = iov; 1818 controlp = (msg->msg_control != NULL) ? &control : NULL; 1819 error = kern_recvit(td, s, msg, UIO_SYSSPACE, controlp); 1820 msg->msg_iov = uiov; 1821 if (error != 0) 1822 goto bad; 1823 1824 /* 1825 * Note that kern_recvit() updates msg->msg_namelen. 1826 */ 1827 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1828 msg->msg_name = PTRIN(l_msghdr.msg_name); 1829 error = linux_copyout_sockaddr(sa, msg->msg_name, 1830 msg->msg_namelen); 1831 if (error != 0) 1832 goto bad; 1833 } 1834 1835 error = bsd_to_linux_msghdr(msg, &l_msghdr); 1836 if (error != 0) 1837 goto bad; 1838 1839 skiped = outlen = 0; 1840 maxlen = l_msghdr.msg_controllen; 1841 if (control == NULL) 1842 goto out; 1843 1844 lcm = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1845 msg->msg_control = mtod(control, struct cmsghdr *); 1846 msg->msg_controllen = control->m_len; 1847 outbuf = PTRIN(l_msghdr.msg_control); 1848 for (m = control; m != NULL; m = m->m_next) { 1849 cm = mtod(m, struct cmsghdr *); 1850 lcm->cmsg_type = bsd_to_linux_cmsg_type(p, cm->cmsg_type, 1851 cm->cmsg_level); 1852 lcm->cmsg_level = bsd_to_linux_sockopt_level(cm->cmsg_level); 1853 1854 if (lcm->cmsg_type == -1 || 1855 cm->cmsg_level == -1) { 1856 LINUX_RATELIMIT_MSG_OPT2( 1857 "unsupported recvmsg cmsg level %d type %d", 1858 cm->cmsg_level, cm->cmsg_type); 1859 /* Skip unsupported messages */ 1860 skiped++; 1861 continue; 1862 } 1863 data = CMSG_DATA(cm); 1864 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1865 udata = NULL; 1866 error = 0; 1867 1868 switch (cm->cmsg_level) { 1869 case IPPROTO_IP: 1870 error = recvmsg_scm_ipproto_ip(cm->cmsg_type, 1871 lcm->cmsg_type, &datalen, &data, &udata); 1872 break; 1873 case SOL_SOCKET: 1874 error = recvmsg_scm_sol_socket(td, cm->cmsg_type, 1875 lcm->cmsg_type, flags, &datalen, &data, &udata); 1876 break; 1877 } 1878 1879 /* The recvmsg_scm_ is responsible to free udata on error. */ 1880 if (error != 0) 1881 goto bad; 1882 1883 if (outlen + LINUX_CMSG_LEN(datalen) > maxlen) { 1884 if (outlen == 0) { 1885 error = EMSGSIZE; 1886 goto err; 1887 } else { 1888 l_msghdr.msg_flags |= LINUX_MSG_CTRUNC; 1889 m_dispose_extcontrolm(control); 1890 free(udata, M_LINUX); 1891 goto out; 1892 } 1893 } 1894 1895 lcm->cmsg_len = LINUX_CMSG_LEN(datalen); 1896 error = copyout(lcm, outbuf, L_CMSG_HDRSZ); 1897 if (error == 0) { 1898 error = copyout(data, LINUX_CMSG_DATA(outbuf), datalen); 1899 if (error == 0) { 1900 outbuf += LINUX_CMSG_SPACE(datalen); 1901 outlen += LINUX_CMSG_SPACE(datalen); 1902 } 1903 } 1904 err: 1905 free(udata, M_LINUX); 1906 if (error != 0) 1907 goto bad; 1908 } 1909 if (outlen == 0 && skiped > 0) { 1910 error = EINVAL; 1911 goto bad; 1912 } 1913 1914 out: 1915 l_msghdr.msg_controllen = outlen; 1916 error = copyout(&l_msghdr, msghdr, sizeof(l_msghdr)); 1917 1918 bad: 1919 if (control != NULL) { 1920 if (error != 0) 1921 m_dispose_extcontrolm(control); 1922 m_freem(control); 1923 } 1924 free(iov, M_IOV); 1925 free(lcm, M_LINUX); 1926 free(sa, M_SONAME); 1927 1928 return (error); 1929 } 1930 1931 int 1932 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1933 { 1934 struct msghdr bsd_msg; 1935 struct file *fp; 1936 int error; 1937 1938 error = getsock(td, args->s, &cap_recv_rights, &fp); 1939 if (error != 0) 1940 return (error); 1941 fdrop(fp, td); 1942 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1943 args->flags, &bsd_msg)); 1944 } 1945 1946 static int 1947 linux_recvmmsg_common(struct thread *td, l_int s, struct l_mmsghdr *msg, 1948 l_uint vlen, l_uint flags, struct timespec *tts) 1949 { 1950 struct msghdr bsd_msg; 1951 struct timespec ts; 1952 struct file *fp; 1953 l_uint retval; 1954 int error, datagrams; 1955 1956 error = getsock(td, s, &cap_recv_rights, &fp); 1957 if (error != 0) 1958 return (error); 1959 datagrams = 0; 1960 while (datagrams < vlen) { 1961 error = linux_recvmsg_common(td, s, &msg->msg_hdr, 1962 flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1963 if (error != 0) 1964 break; 1965 1966 retval = td->td_retval[0]; 1967 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1968 if (error != 0) 1969 break; 1970 ++msg; 1971 ++datagrams; 1972 1973 /* 1974 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1975 */ 1976 if (flags & LINUX_MSG_WAITFORONE) 1977 flags |= LINUX_MSG_DONTWAIT; 1978 1979 /* 1980 * See BUGS section of recvmmsg(2). 1981 */ 1982 if (tts) { 1983 getnanotime(&ts); 1984 timespecsub(&ts, tts, &ts); 1985 if (!timespecisset(&ts) || ts.tv_sec > 0) 1986 break; 1987 } 1988 /* Out of band data, return right away. */ 1989 if (bsd_msg.msg_flags & MSG_OOB) 1990 break; 1991 } 1992 if (error == 0) 1993 td->td_retval[0] = datagrams; 1994 fdrop(fp, td); 1995 return (error); 1996 } 1997 1998 int 1999 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 2000 { 2001 struct timespec ts, tts, *ptts; 2002 int error; 2003 2004 if (args->timeout) { 2005 error = linux_get_timespec(&ts, args->timeout); 2006 if (error != 0) 2007 return (error); 2008 getnanotime(&tts); 2009 timespecadd(&tts, &ts, &tts); 2010 ptts = &tts; 2011 } 2012 else ptts = NULL; 2013 2014 return (linux_recvmmsg_common(td, args->s, PTRIN(args->msg), 2015 args->vlen, args->flags, ptts)); 2016 } 2017 2018 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 2019 int 2020 linux_recvmmsg_time64(struct thread *td, struct linux_recvmmsg_time64_args *args) 2021 { 2022 struct timespec ts, tts, *ptts; 2023 int error; 2024 2025 if (args->timeout) { 2026 error = linux_get_timespec64(&ts, args->timeout); 2027 if (error != 0) 2028 return (error); 2029 getnanotime(&tts); 2030 timespecadd(&tts, &ts, &tts); 2031 ptts = &tts; 2032 } 2033 else ptts = NULL; 2034 2035 return (linux_recvmmsg_common(td, args->s, PTRIN(args->msg), 2036 args->vlen, args->flags, ptts)); 2037 } 2038 #endif 2039 2040 int 2041 linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 2042 { 2043 2044 return (kern_shutdown(td, args->s, args->how)); 2045 } 2046 2047 int 2048 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 2049 { 2050 struct proc *p = td->td_proc; 2051 struct linux_pemuldata *pem; 2052 l_timeval linux_tv; 2053 struct sockaddr *sa; 2054 struct timeval tv; 2055 socklen_t len; 2056 int error, level, name, val; 2057 2058 level = linux_to_bsd_sockopt_level(args->level); 2059 switch (level) { 2060 case SOL_SOCKET: 2061 name = linux_to_bsd_so_sockopt(args->optname); 2062 switch (name) { 2063 case LOCAL_CREDS_PERSISTENT: 2064 level = SOL_LOCAL; 2065 break; 2066 case SO_RCVTIMEO: 2067 /* FALLTHROUGH */ 2068 case SO_SNDTIMEO: 2069 error = copyin(PTRIN(args->optval), &linux_tv, 2070 sizeof(linux_tv)); 2071 if (error != 0) 2072 return (error); 2073 tv.tv_sec = linux_tv.tv_sec; 2074 tv.tv_usec = linux_tv.tv_usec; 2075 return (kern_setsockopt(td, args->s, level, 2076 name, &tv, UIO_SYSSPACE, sizeof(tv))); 2077 /* NOTREACHED */ 2078 case SO_TIMESTAMP: 2079 /* overwrite SO_BINTIME */ 2080 val = 0; 2081 error = kern_setsockopt(td, args->s, level, 2082 SO_BINTIME, &val, UIO_SYSSPACE, sizeof(val)); 2083 if (error != 0) 2084 return (error); 2085 pem = pem_find(p); 2086 pem->so_timestamp = args->optname; 2087 break; 2088 case SO_BINTIME: 2089 /* overwrite SO_TIMESTAMP */ 2090 val = 0; 2091 error = kern_setsockopt(td, args->s, level, 2092 SO_TIMESTAMP, &val, UIO_SYSSPACE, sizeof(val)); 2093 if (error != 0) 2094 return (error); 2095 pem = pem_find(p); 2096 pem->so_timestampns = args->optname; 2097 break; 2098 default: 2099 break; 2100 } 2101 break; 2102 case IPPROTO_IP: 2103 if (args->optname == LINUX_IP_RECVERR && 2104 linux_ignore_ip_recverr) { 2105 /* 2106 * XXX: This is a hack to unbreak DNS resolution 2107 * with glibc 2.30 and above. 2108 */ 2109 return (0); 2110 } 2111 name = linux_to_bsd_ip_sockopt(args->optname); 2112 break; 2113 case IPPROTO_IPV6: 2114 name = linux_to_bsd_ip6_sockopt(args->optname); 2115 break; 2116 case IPPROTO_TCP: 2117 name = linux_to_bsd_tcp_sockopt(args->optname); 2118 break; 2119 case SOL_NETLINK: 2120 level = SOL_SOCKET; 2121 name = args->optname; 2122 break; 2123 default: 2124 name = -1; 2125 break; 2126 } 2127 if (name < 0) { 2128 if (name == -1) 2129 linux_msg(curthread, 2130 "unsupported setsockopt level %d optname %d", 2131 args->level, args->optname); 2132 return (ENOPROTOOPT); 2133 } 2134 2135 if (name == IPV6_NEXTHOP) { 2136 len = args->optlen; 2137 error = linux_to_bsd_sockaddr(PTRIN(args->optval), &sa, &len); 2138 if (error != 0) 2139 return (error); 2140 2141 error = kern_setsockopt(td, args->s, level, 2142 name, sa, UIO_SYSSPACE, len); 2143 free(sa, M_SONAME); 2144 } else { 2145 error = kern_setsockopt(td, args->s, level, 2146 name, PTRIN(args->optval), UIO_USERSPACE, args->optlen); 2147 } 2148 2149 return (error); 2150 } 2151 2152 static int 2153 linux_sockopt_copyout(struct thread *td, void *val, socklen_t len, 2154 struct linux_getsockopt_args *args) 2155 { 2156 int error; 2157 2158 error = copyout(val, PTRIN(args->optval), len); 2159 if (error == 0) 2160 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2161 return (error); 2162 } 2163 2164 static int 2165 linux_getsockopt_so_peergroups(struct thread *td, 2166 struct linux_getsockopt_args *args) 2167 { 2168 struct xucred xu; 2169 socklen_t xulen, len; 2170 int error, i; 2171 2172 xulen = sizeof(xu); 2173 error = kern_getsockopt(td, args->s, 0, 2174 LOCAL_PEERCRED, &xu, UIO_SYSSPACE, &xulen); 2175 if (error != 0) 2176 return (error); 2177 2178 len = xu.cr_ngroups * sizeof(l_gid_t); 2179 if (args->optlen < len) { 2180 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2181 if (error == 0) 2182 error = ERANGE; 2183 return (error); 2184 } 2185 2186 /* 2187 * "- 1" to skip the primary group. 2188 */ 2189 for (i = 0; i < xu.cr_ngroups - 1; i++) { 2190 error = copyout(xu.cr_groups + i + 1, 2191 (void *)(args->optval + i * sizeof(l_gid_t)), 2192 sizeof(l_gid_t)); 2193 if (error != 0) 2194 return (error); 2195 } 2196 2197 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2198 return (error); 2199 } 2200 2201 static int 2202 linux_getsockopt_so_peersec(struct thread *td, 2203 struct linux_getsockopt_args *args) 2204 { 2205 socklen_t len; 2206 int error; 2207 2208 len = sizeof(SECURITY_CONTEXT_STRING); 2209 if (args->optlen < len) { 2210 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2211 if (error == 0) 2212 error = ERANGE; 2213 return (error); 2214 } 2215 2216 return (linux_sockopt_copyout(td, SECURITY_CONTEXT_STRING, 2217 len, args)); 2218 } 2219 2220 static int 2221 linux_getsockopt_so_linger(struct thread *td, 2222 struct linux_getsockopt_args *args) 2223 { 2224 struct linger ling; 2225 socklen_t len; 2226 int error; 2227 2228 len = sizeof(ling); 2229 error = kern_getsockopt(td, args->s, SOL_SOCKET, 2230 SO_LINGER, &ling, UIO_SYSSPACE, &len); 2231 if (error != 0) 2232 return (error); 2233 ling.l_onoff = ((ling.l_onoff & SO_LINGER) != 0); 2234 return (linux_sockopt_copyout(td, &ling, len, args)); 2235 } 2236 2237 int 2238 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 2239 { 2240 l_timeval linux_tv; 2241 struct timeval tv; 2242 socklen_t tv_len, xulen, len; 2243 struct sockaddr *sa; 2244 struct xucred xu; 2245 struct l_ucred lxu; 2246 int error, level, name, newval; 2247 2248 level = linux_to_bsd_sockopt_level(args->level); 2249 switch (level) { 2250 case SOL_SOCKET: 2251 switch (args->optname) { 2252 case LINUX_SO_PEERGROUPS: 2253 return (linux_getsockopt_so_peergroups(td, args)); 2254 case LINUX_SO_PEERSEC: 2255 return (linux_getsockopt_so_peersec(td, args)); 2256 default: 2257 break; 2258 } 2259 2260 name = linux_to_bsd_so_sockopt(args->optname); 2261 switch (name) { 2262 case LOCAL_CREDS_PERSISTENT: 2263 level = SOL_LOCAL; 2264 break; 2265 case SO_RCVTIMEO: 2266 /* FALLTHROUGH */ 2267 case SO_SNDTIMEO: 2268 tv_len = sizeof(tv); 2269 error = kern_getsockopt(td, args->s, level, 2270 name, &tv, UIO_SYSSPACE, &tv_len); 2271 if (error != 0) 2272 return (error); 2273 linux_tv.tv_sec = tv.tv_sec; 2274 linux_tv.tv_usec = tv.tv_usec; 2275 return (linux_sockopt_copyout(td, &linux_tv, 2276 sizeof(linux_tv), args)); 2277 /* NOTREACHED */ 2278 case LOCAL_PEERCRED: 2279 if (args->optlen < sizeof(lxu)) 2280 return (EINVAL); 2281 /* 2282 * LOCAL_PEERCRED is not served at the SOL_SOCKET level, 2283 * but by the Unix socket's level 0. 2284 */ 2285 level = 0; 2286 xulen = sizeof(xu); 2287 error = kern_getsockopt(td, args->s, level, 2288 name, &xu, UIO_SYSSPACE, &xulen); 2289 if (error != 0) 2290 return (error); 2291 lxu.pid = xu.cr_pid; 2292 lxu.uid = xu.cr_uid; 2293 lxu.gid = xu.cr_gid; 2294 return (linux_sockopt_copyout(td, &lxu, 2295 sizeof(lxu), args)); 2296 /* NOTREACHED */ 2297 case SO_ERROR: 2298 len = sizeof(newval); 2299 error = kern_getsockopt(td, args->s, level, 2300 name, &newval, UIO_SYSSPACE, &len); 2301 if (error != 0) 2302 return (error); 2303 newval = -bsd_to_linux_errno(newval); 2304 return (linux_sockopt_copyout(td, &newval, 2305 len, args)); 2306 /* NOTREACHED */ 2307 case SO_DOMAIN: 2308 len = sizeof(newval); 2309 error = kern_getsockopt(td, args->s, level, 2310 name, &newval, UIO_SYSSPACE, &len); 2311 if (error != 0) 2312 return (error); 2313 newval = bsd_to_linux_domain(newval); 2314 if (newval == -1) 2315 return (ENOPROTOOPT); 2316 return (linux_sockopt_copyout(td, &newval, 2317 len, args)); 2318 /* NOTREACHED */ 2319 case SO_LINGER: 2320 return (linux_getsockopt_so_linger(td, args)); 2321 /* NOTREACHED */ 2322 default: 2323 break; 2324 } 2325 break; 2326 case IPPROTO_IP: 2327 name = linux_to_bsd_ip_sockopt(args->optname); 2328 break; 2329 case IPPROTO_IPV6: 2330 name = linux_to_bsd_ip6_sockopt(args->optname); 2331 break; 2332 case IPPROTO_TCP: 2333 name = linux_to_bsd_tcp_sockopt(args->optname); 2334 break; 2335 default: 2336 name = -1; 2337 break; 2338 } 2339 if (name < 0) { 2340 if (name == -1) 2341 linux_msg(curthread, 2342 "unsupported getsockopt level %d optname %d", 2343 args->level, args->optname); 2344 return (EINVAL); 2345 } 2346 2347 if (name == IPV6_NEXTHOP) { 2348 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 2349 if (error != 0) 2350 return (error); 2351 sa = malloc(len, M_SONAME, M_WAITOK); 2352 2353 error = kern_getsockopt(td, args->s, level, 2354 name, sa, UIO_SYSSPACE, &len); 2355 if (error != 0) 2356 goto out; 2357 2358 error = linux_copyout_sockaddr(sa, PTRIN(args->optval), len); 2359 if (error == 0) 2360 error = copyout(&len, PTRIN(args->optlen), 2361 sizeof(len)); 2362 out: 2363 free(sa, M_SONAME); 2364 } else { 2365 if (args->optval) { 2366 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 2367 if (error != 0) 2368 return (error); 2369 } 2370 error = kern_getsockopt(td, args->s, level, 2371 name, PTRIN(args->optval), UIO_USERSPACE, &len); 2372 if (error == 0) 2373 error = copyout(&len, PTRIN(args->optlen), 2374 sizeof(len)); 2375 } 2376 2377 return (error); 2378 } 2379 2380 /* 2381 * Based on sendfile_getsock from kern_sendfile.c 2382 * Determines whether an fd is a stream socket that can be used 2383 * with FreeBSD sendfile. 2384 */ 2385 static bool 2386 is_sendfile(struct file *fp, struct file *ofp) 2387 { 2388 struct socket *so; 2389 2390 /* 2391 * FreeBSD sendfile() system call sends a regular file or 2392 * shared memory object out a stream socket. 2393 */ 2394 if ((fp->f_type != DTYPE_SHM && fp->f_type != DTYPE_VNODE) || 2395 (fp->f_type == DTYPE_VNODE && 2396 (fp->f_vnode == NULL || fp->f_vnode->v_type != VREG))) 2397 return (false); 2398 /* 2399 * The socket must be a stream socket and connected. 2400 */ 2401 if (ofp->f_type != DTYPE_SOCKET) 2402 return (false); 2403 so = ofp->f_data; 2404 if (so->so_type != SOCK_STREAM) 2405 return (false); 2406 /* 2407 * SCTP one-to-one style sockets currently don't work with 2408 * sendfile(). 2409 */ 2410 if (so->so_proto->pr_protocol == IPPROTO_SCTP) 2411 return (false); 2412 return (!SOLISTENING(so)); 2413 } 2414 2415 static bool 2416 is_regular_file(struct file *fp) 2417 { 2418 2419 return (fp->f_type == DTYPE_VNODE && fp->f_vnode != NULL && 2420 fp->f_vnode->v_type == VREG); 2421 } 2422 2423 static int 2424 sendfile_fallback(struct thread *td, struct file *fp, l_int out, 2425 off_t *offset, l_size_t count, off_t *sbytes) 2426 { 2427 off_t current_offset, out_offset, to_send; 2428 l_size_t bytes_sent, n_read; 2429 struct file *ofp; 2430 struct iovec aiov; 2431 struct uio auio; 2432 bool seekable; 2433 size_t bufsz; 2434 void *buf; 2435 int flags, error; 2436 2437 if (offset == NULL) { 2438 if ((error = fo_seek(fp, 0, SEEK_CUR, td)) != 0) 2439 return (error); 2440 current_offset = td->td_uretoff.tdu_off; 2441 } else { 2442 if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) 2443 return (ESPIPE); 2444 current_offset = *offset; 2445 } 2446 error = fget_write(td, out, &cap_pwrite_rights, &ofp); 2447 if (error != 0) 2448 return (error); 2449 seekable = (ofp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0; 2450 if (seekable) { 2451 if ((error = fo_seek(ofp, 0, SEEK_CUR, td)) != 0) 2452 goto drop; 2453 out_offset = td->td_uretoff.tdu_off; 2454 } else 2455 out_offset = 0; 2456 2457 flags = FOF_OFFSET | FOF_NOUPDATE; 2458 bufsz = min(count, MAXPHYS); 2459 buf = malloc(bufsz, M_LINUX, M_WAITOK); 2460 bytes_sent = 0; 2461 while (bytes_sent < count) { 2462 to_send = min(count - bytes_sent, bufsz); 2463 aiov.iov_base = buf; 2464 aiov.iov_len = bufsz; 2465 auio.uio_iov = &aiov; 2466 auio.uio_iovcnt = 1; 2467 auio.uio_segflg = UIO_SYSSPACE; 2468 auio.uio_td = td; 2469 auio.uio_rw = UIO_READ; 2470 auio.uio_offset = current_offset; 2471 auio.uio_resid = to_send; 2472 error = fo_read(fp, &auio, fp->f_cred, flags, td); 2473 if (error != 0) 2474 break; 2475 n_read = to_send - auio.uio_resid; 2476 if (n_read == 0) 2477 break; 2478 aiov.iov_base = buf; 2479 aiov.iov_len = bufsz; 2480 auio.uio_iov = &aiov; 2481 auio.uio_iovcnt = 1; 2482 auio.uio_segflg = UIO_SYSSPACE; 2483 auio.uio_td = td; 2484 auio.uio_rw = UIO_WRITE; 2485 auio.uio_offset = (seekable) ? out_offset : 0; 2486 auio.uio_resid = n_read; 2487 error = fo_write(ofp, &auio, ofp->f_cred, flags, td); 2488 if (error != 0) 2489 break; 2490 bytes_sent += n_read; 2491 current_offset += n_read; 2492 out_offset += n_read; 2493 } 2494 free(buf, M_LINUX); 2495 2496 if (error == 0) { 2497 *sbytes = bytes_sent; 2498 if (offset != NULL) 2499 *offset = current_offset; 2500 else 2501 error = fo_seek(fp, current_offset, SEEK_SET, td); 2502 } 2503 if (error == 0 && seekable) 2504 error = fo_seek(ofp, out_offset, SEEK_SET, td); 2505 2506 drop: 2507 fdrop(ofp, td); 2508 return (error); 2509 } 2510 2511 static int 2512 sendfile_sendfile(struct thread *td, struct file *fp, l_int out, 2513 off_t *offset, l_size_t count, off_t *sbytes) 2514 { 2515 off_t current_offset; 2516 int error; 2517 2518 if (offset == NULL) { 2519 if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) 2520 return (ESPIPE); 2521 if ((error = fo_seek(fp, 0, SEEK_CUR, td)) != 0) 2522 return (error); 2523 current_offset = td->td_uretoff.tdu_off; 2524 } else 2525 current_offset = *offset; 2526 error = fo_sendfile(fp, out, NULL, NULL, current_offset, count, 2527 sbytes, 0, td); 2528 if (error == 0) { 2529 current_offset += *sbytes; 2530 if (offset != NULL) 2531 *offset = current_offset; 2532 else 2533 error = fo_seek(fp, current_offset, SEEK_SET, td); 2534 } 2535 return (error); 2536 } 2537 2538 static int 2539 linux_sendfile_common(struct thread *td, l_int out, l_int in, 2540 off_t *offset, l_size_t count) 2541 { 2542 struct file *fp, *ofp; 2543 off_t sbytes; 2544 int error; 2545 2546 /* Linux cannot have 0 count. */ 2547 if (count <= 0 || (offset != NULL && *offset < 0)) 2548 return (EINVAL); 2549 2550 AUDIT_ARG_FD(in); 2551 error = fget_read(td, in, &cap_pread_rights, &fp); 2552 if (error != 0) 2553 return (error); 2554 if ((fp->f_type != DTYPE_SHM && fp->f_type != DTYPE_VNODE) || 2555 (fp->f_type == DTYPE_VNODE && 2556 (fp->f_vnode == NULL || fp->f_vnode->v_type != VREG))) { 2557 error = EINVAL; 2558 goto drop; 2559 } 2560 error = fget_unlocked(td, out, &cap_no_rights, &ofp); 2561 if (error != 0) 2562 goto drop; 2563 2564 if (is_regular_file(fp) && is_regular_file(ofp)) { 2565 error = kern_copy_file_range(td, in, offset, out, NULL, count, 2566 0); 2567 } else { 2568 sbytes = 0; 2569 if (is_sendfile(fp, ofp)) 2570 error = sendfile_sendfile(td, fp, out, offset, count, 2571 &sbytes); 2572 else 2573 error = sendfile_fallback(td, fp, out, offset, count, 2574 &sbytes); 2575 if (error == ENOBUFS && (ofp->f_flag & FNONBLOCK) != 0) 2576 error = EAGAIN; 2577 if (error == 0) 2578 td->td_retval[0] = sbytes; 2579 } 2580 fdrop(ofp, td); 2581 2582 drop: 2583 fdrop(fp, td); 2584 return (error); 2585 } 2586 2587 int 2588 linux_sendfile(struct thread *td, struct linux_sendfile_args *arg) 2589 { 2590 /* 2591 * Differences between FreeBSD and Linux sendfile: 2592 * - Linux doesn't send anything when count is 0 (FreeBSD uses 0 to 2593 * mean send the whole file). 2594 * - Linux can send to any fd whereas FreeBSD only supports sockets. 2595 * We therefore use FreeBSD sendfile where possible for performance, 2596 * but fall back on a manual copy (sendfile_fallback). 2597 * - Linux doesn't have an equivalent for FreeBSD's flags and sf_hdtr. 2598 * - Linux takes an offset pointer and updates it to the read location. 2599 * FreeBSD takes in an offset and a 'bytes read' parameter which is 2600 * only filled if it isn't NULL. We use this parameter to update the 2601 * offset pointer if it exists. 2602 * - Linux sendfile returns bytes read on success while FreeBSD 2603 * returns 0. We use the 'bytes read' parameter to get this value. 2604 */ 2605 2606 off_t offset64; 2607 l_off_t offset; 2608 int error; 2609 2610 if (arg->offset != NULL) { 2611 error = copyin(arg->offset, &offset, sizeof(offset)); 2612 if (error != 0) 2613 return (error); 2614 offset64 = offset; 2615 } 2616 2617 error = linux_sendfile_common(td, arg->out, arg->in, 2618 arg->offset != NULL ? &offset64 : NULL, arg->count); 2619 2620 if (error == 0 && arg->offset != NULL) { 2621 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 2622 if (offset64 > INT32_MAX) 2623 return (EOVERFLOW); 2624 #endif 2625 offset = (l_off_t)offset64; 2626 error = copyout(&offset, arg->offset, sizeof(offset)); 2627 } 2628 2629 return (error); 2630 } 2631 2632 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 2633 int 2634 linux_sendfile64(struct thread *td, struct linux_sendfile64_args *arg) 2635 { 2636 off_t offset; 2637 int error; 2638 2639 if (arg->offset != NULL) { 2640 error = copyin(arg->offset, &offset, sizeof(offset)); 2641 if (error != 0) 2642 return (error); 2643 } 2644 2645 error = linux_sendfile_common(td, arg->out, arg->in, 2646 arg->offset != NULL ? &offset : NULL, arg->count); 2647 2648 if (error == 0 && arg->offset != NULL) 2649 error = copyout(&offset, arg->offset, sizeof(offset)); 2650 2651 return (error); 2652 } 2653 2654 /* Argument list sizes for linux_socketcall */ 2655 static const unsigned char lxs_args_cnt[] = { 2656 0 /* unused*/, 3 /* socket */, 2657 3 /* bind */, 3 /* connect */, 2658 2 /* listen */, 3 /* accept */, 2659 3 /* getsockname */, 3 /* getpeername */, 2660 4 /* socketpair */, 4 /* send */, 2661 4 /* recv */, 6 /* sendto */, 2662 6 /* recvfrom */, 2 /* shutdown */, 2663 5 /* setsockopt */, 5 /* getsockopt */, 2664 3 /* sendmsg */, 3 /* recvmsg */, 2665 4 /* accept4 */, 5 /* recvmmsg */, 2666 4 /* sendmmsg */, 4 /* sendfile */ 2667 }; 2668 #define LINUX_ARGS_CNT (nitems(lxs_args_cnt) - 1) 2669 #define LINUX_ARG_SIZE(x) (lxs_args_cnt[x] * sizeof(l_ulong)) 2670 2671 int 2672 linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 2673 { 2674 l_ulong a[6]; 2675 #if defined(__amd64__) && defined(COMPAT_LINUX32) 2676 register_t l_args[6]; 2677 #endif 2678 void *arg; 2679 int error; 2680 2681 if (args->what < LINUX_SOCKET || args->what > LINUX_ARGS_CNT) 2682 return (EINVAL); 2683 error = copyin(PTRIN(args->args), a, LINUX_ARG_SIZE(args->what)); 2684 if (error != 0) 2685 return (error); 2686 2687 #if defined(__amd64__) && defined(COMPAT_LINUX32) 2688 for (int i = 0; i < lxs_args_cnt[args->what]; ++i) 2689 l_args[i] = a[i]; 2690 arg = l_args; 2691 #else 2692 arg = a; 2693 #endif 2694 switch (args->what) { 2695 case LINUX_SOCKET: 2696 return (linux_socket(td, arg)); 2697 case LINUX_BIND: 2698 return (linux_bind(td, arg)); 2699 case LINUX_CONNECT: 2700 return (linux_connect(td, arg)); 2701 case LINUX_LISTEN: 2702 return (linux_listen(td, arg)); 2703 case LINUX_ACCEPT: 2704 return (linux_accept(td, arg)); 2705 case LINUX_GETSOCKNAME: 2706 return (linux_getsockname(td, arg)); 2707 case LINUX_GETPEERNAME: 2708 return (linux_getpeername(td, arg)); 2709 case LINUX_SOCKETPAIR: 2710 return (linux_socketpair(td, arg)); 2711 case LINUX_SEND: 2712 return (linux_send(td, arg)); 2713 case LINUX_RECV: 2714 return (linux_recv(td, arg)); 2715 case LINUX_SENDTO: 2716 return (linux_sendto(td, arg)); 2717 case LINUX_RECVFROM: 2718 return (linux_recvfrom(td, arg)); 2719 case LINUX_SHUTDOWN: 2720 return (linux_shutdown(td, arg)); 2721 case LINUX_SETSOCKOPT: 2722 return (linux_setsockopt(td, arg)); 2723 case LINUX_GETSOCKOPT: 2724 return (linux_getsockopt(td, arg)); 2725 case LINUX_SENDMSG: 2726 return (linux_sendmsg(td, arg)); 2727 case LINUX_RECVMSG: 2728 return (linux_recvmsg(td, arg)); 2729 case LINUX_ACCEPT4: 2730 return (linux_accept4(td, arg)); 2731 case LINUX_RECVMMSG: 2732 return (linux_recvmmsg(td, arg)); 2733 case LINUX_SENDMMSG: 2734 return (linux_sendmmsg(td, arg)); 2735 case LINUX_SENDFILE: 2736 return (linux_sendfile(td, arg)); 2737 } 2738 2739 linux_msg(td, "socket type %d not implemented", args->what); 2740 return (ENOSYS); 2741 } 2742 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 2743