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 *sa; 1021 struct file *fp, *fp1; 1022 int bflags, len; 1023 struct socket *so; 1024 int error, error1; 1025 1026 bflags = 0; 1027 fp = NULL; 1028 sa = NULL; 1029 1030 error = linux_set_socket_flags(flags, &bflags); 1031 if (error != 0) 1032 return (error); 1033 1034 if (PTRIN(addr) == NULL) { 1035 len = 0; 1036 error = kern_accept4(td, s, NULL, NULL, bflags, NULL); 1037 } else { 1038 error = copyin(PTRIN(namelen), &len, sizeof(len)); 1039 if (error != 0) 1040 return (error); 1041 if (len < 0) 1042 return (EINVAL); 1043 error = kern_accept4(td, s, &sa, &len, bflags, &fp); 1044 } 1045 1046 /* 1047 * Translate errno values into ones used by Linux. 1048 */ 1049 if (error != 0) { 1050 /* 1051 * XXX. This is wrong, different sockaddr structures 1052 * have different sizes. 1053 */ 1054 switch (error) { 1055 case EFAULT: 1056 if (namelen != sizeof(struct sockaddr_in)) 1057 error = EINVAL; 1058 break; 1059 case EINVAL: 1060 error1 = getsock(td, s, &cap_accept_rights, &fp1); 1061 if (error1 != 0) { 1062 error = error1; 1063 break; 1064 } 1065 so = fp1->f_data; 1066 if (so->so_type == SOCK_DGRAM) 1067 error = EOPNOTSUPP; 1068 fdrop(fp1, td); 1069 break; 1070 } 1071 return (error); 1072 } 1073 1074 if (len != 0) { 1075 error = linux_copyout_sockaddr(sa, PTRIN(addr), len); 1076 if (error == 0) 1077 error = copyout(&len, PTRIN(namelen), 1078 sizeof(len)); 1079 if (error != 0) { 1080 fdclose(td, fp, td->td_retval[0]); 1081 td->td_retval[0] = 0; 1082 } 1083 } 1084 if (fp != NULL) 1085 fdrop(fp, td); 1086 free(sa, M_SONAME); 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 *sa; 1110 int len, error; 1111 1112 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 1113 if (error != 0) 1114 return (error); 1115 1116 error = kern_getsockname(td, args->s, &sa, &len); 1117 if (error != 0) 1118 return (error); 1119 1120 if (len != 0) 1121 error = linux_copyout_sockaddr(sa, PTRIN(args->addr), len); 1122 1123 free(sa, M_SONAME); 1124 if (error == 0) 1125 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 1126 return (error); 1127 } 1128 1129 int 1130 linux_getpeername(struct thread *td, struct linux_getpeername_args *args) 1131 { 1132 struct sockaddr *sa; 1133 int len, error; 1134 1135 error = copyin(PTRIN(args->namelen), &len, sizeof(len)); 1136 if (error != 0) 1137 return (error); 1138 if (len < 0) 1139 return (EINVAL); 1140 1141 error = kern_getpeername(td, args->s, &sa, &len); 1142 if (error != 0) 1143 return (error); 1144 1145 if (len != 0) 1146 error = linux_copyout_sockaddr(sa, PTRIN(args->addr), len); 1147 1148 free(sa, M_SONAME); 1149 if (error == 0) 1150 error = copyout(&len, PTRIN(args->namelen), sizeof(len)); 1151 return (error); 1152 } 1153 1154 int 1155 linux_socketpair(struct thread *td, struct linux_socketpair_args *args) 1156 { 1157 int domain, error, sv[2], type; 1158 1159 domain = linux_to_bsd_domain(args->domain); 1160 if (domain != PF_LOCAL) 1161 return (EAFNOSUPPORT); 1162 type = args->type & LINUX_SOCK_TYPE_MASK; 1163 if (type < 0 || type > LINUX_SOCK_MAX) 1164 return (EINVAL); 1165 error = linux_set_socket_flags(args->type & ~LINUX_SOCK_TYPE_MASK, 1166 &type); 1167 if (error != 0) 1168 return (error); 1169 if (args->protocol != 0 && args->protocol != PF_UNIX) { 1170 /* 1171 * Use of PF_UNIX as protocol argument is not right, 1172 * but Linux does it. 1173 * Do not map PF_UNIX as its Linux value is identical 1174 * to FreeBSD one. 1175 */ 1176 return (EPROTONOSUPPORT); 1177 } 1178 error = kern_socketpair(td, domain, type, 0, sv); 1179 if (error != 0) 1180 return (error); 1181 error = copyout(sv, PTRIN(args->rsv), 2 * sizeof(int)); 1182 if (error != 0) { 1183 (void)kern_close(td, sv[0]); 1184 (void)kern_close(td, sv[1]); 1185 } 1186 return (error); 1187 } 1188 1189 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1190 struct linux_send_args { 1191 register_t s; 1192 register_t msg; 1193 register_t len; 1194 register_t flags; 1195 }; 1196 1197 static int 1198 linux_send(struct thread *td, struct linux_send_args *args) 1199 { 1200 struct sendto_args /* { 1201 int s; 1202 caddr_t buf; 1203 int len; 1204 int flags; 1205 caddr_t to; 1206 int tolen; 1207 } */ bsd_args; 1208 struct file *fp; 1209 int error; 1210 1211 bsd_args.s = args->s; 1212 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1213 bsd_args.len = args->len; 1214 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1215 bsd_args.to = NULL; 1216 bsd_args.tolen = 0; 1217 error = sys_sendto(td, &bsd_args); 1218 if (error == ENOTCONN) { 1219 /* 1220 * Linux doesn't return ENOTCONN for non-blocking sockets. 1221 * Instead it returns the EAGAIN. 1222 */ 1223 error = getsock(td, args->s, &cap_send_rights, &fp); 1224 if (error == 0) { 1225 if (atomic_load_int(&fp->f_flag) & FNONBLOCK) 1226 error = EAGAIN; 1227 fdrop(fp, td); 1228 } 1229 } 1230 return (error); 1231 } 1232 1233 struct linux_recv_args { 1234 register_t s; 1235 register_t msg; 1236 register_t len; 1237 register_t flags; 1238 }; 1239 1240 static int 1241 linux_recv(struct thread *td, struct linux_recv_args *args) 1242 { 1243 struct recvfrom_args /* { 1244 int s; 1245 caddr_t buf; 1246 int len; 1247 int flags; 1248 struct sockaddr *from; 1249 socklen_t fromlenaddr; 1250 } */ bsd_args; 1251 1252 bsd_args.s = args->s; 1253 bsd_args.buf = (caddr_t)PTRIN(args->msg); 1254 bsd_args.len = args->len; 1255 bsd_args.flags = linux_to_bsd_msg_flags(args->flags); 1256 bsd_args.from = NULL; 1257 bsd_args.fromlenaddr = 0; 1258 return (sys_recvfrom(td, &bsd_args)); 1259 } 1260 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1261 1262 int 1263 linux_sendto(struct thread *td, struct linux_sendto_args *args) 1264 { 1265 struct msghdr msg; 1266 struct iovec aiov; 1267 struct socket *so; 1268 struct file *fp; 1269 int error; 1270 1271 if (linux_check_hdrincl(td, args->s) == 0) 1272 /* IP_HDRINCL set, tweak the packet before sending */ 1273 return (linux_sendto_hdrincl(td, args)); 1274 1275 bzero(&msg, sizeof(msg)); 1276 error = getsock(td, args->s, &cap_send_connect_rights, &fp); 1277 if (error != 0) 1278 return (error); 1279 so = fp->f_data; 1280 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0) { 1281 msg.msg_name = PTRIN(args->to); 1282 msg.msg_namelen = args->tolen; 1283 } 1284 msg.msg_iov = &aiov; 1285 msg.msg_iovlen = 1; 1286 aiov.iov_base = PTRIN(args->msg); 1287 aiov.iov_len = args->len; 1288 fdrop(fp, td); 1289 return (linux_sendit(td, args->s, &msg, args->flags, NULL, 1290 UIO_USERSPACE)); 1291 } 1292 1293 int 1294 linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) 1295 { 1296 struct sockaddr *sa; 1297 struct msghdr msg; 1298 struct iovec aiov; 1299 int error, fromlen; 1300 1301 if (PTRIN(args->fromlen) != NULL) { 1302 error = copyin(PTRIN(args->fromlen), &fromlen, 1303 sizeof(fromlen)); 1304 if (error != 0) 1305 return (error); 1306 if (fromlen < 0) 1307 return (EINVAL); 1308 fromlen = min(fromlen, SOCK_MAXADDRLEN); 1309 sa = malloc(fromlen, M_SONAME, M_WAITOK); 1310 } else { 1311 fromlen = 0; 1312 sa = NULL; 1313 } 1314 1315 msg.msg_name = sa; 1316 msg.msg_namelen = fromlen; 1317 msg.msg_iov = &aiov; 1318 msg.msg_iovlen = 1; 1319 aiov.iov_base = PTRIN(args->buf); 1320 aiov.iov_len = args->len; 1321 msg.msg_control = 0; 1322 msg.msg_flags = linux_to_bsd_msg_flags(args->flags); 1323 1324 error = kern_recvit(td, args->s, &msg, UIO_SYSSPACE, NULL); 1325 if (error != 0) 1326 goto out; 1327 1328 /* 1329 * XXX. Seems that FreeBSD is different from Linux here. Linux 1330 * fill source address if underlying protocol provides it, while 1331 * FreeBSD fill it if underlying protocol is not connection-oriented. 1332 * So, kern_recvit() set msg.msg_namelen to 0 if protocol pr_flags 1333 * does not contains PR_ADDR flag. 1334 */ 1335 if (PTRIN(args->from) != NULL && msg.msg_namelen != 0) 1336 error = linux_copyout_sockaddr(sa, PTRIN(args->from), 1337 msg.msg_namelen); 1338 1339 if (error == 0 && PTRIN(args->fromlen) != NULL) 1340 error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), 1341 sizeof(msg.msg_namelen)); 1342 out: 1343 free(sa, M_SONAME); 1344 return (error); 1345 } 1346 1347 static int 1348 linux_sendmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1349 l_uint flags) 1350 { 1351 struct cmsghdr *cmsg; 1352 struct mbuf *control; 1353 struct msghdr msg; 1354 struct l_cmsghdr linux_cmsg; 1355 struct l_cmsghdr *ptr_cmsg; 1356 struct l_msghdr linux_msghdr; 1357 struct iovec *iov; 1358 socklen_t datalen; 1359 struct sockaddr *sa; 1360 struct socket *so; 1361 sa_family_t sa_family; 1362 struct file *fp; 1363 void *data; 1364 l_size_t len; 1365 l_size_t clen; 1366 int error; 1367 1368 error = copyin(msghdr, &linux_msghdr, sizeof(linux_msghdr)); 1369 if (error != 0) 1370 return (error); 1371 1372 /* 1373 * Some Linux applications (ping) define a non-NULL control data 1374 * pointer, but a msg_controllen of 0, which is not allowed in the 1375 * FreeBSD system call interface. NULL the msg_control pointer in 1376 * order to handle this case. This should be checked, but allows the 1377 * Linux ping to work. 1378 */ 1379 if (PTRIN(linux_msghdr.msg_control) != NULL && 1380 linux_msghdr.msg_controllen == 0) 1381 linux_msghdr.msg_control = PTROUT(NULL); 1382 1383 error = linux_to_bsd_msghdr(&msg, &linux_msghdr); 1384 if (error != 0) 1385 return (error); 1386 1387 #ifdef COMPAT_LINUX32 1388 error = freebsd32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, 1389 &iov, EMSGSIZE); 1390 #else 1391 error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); 1392 #endif 1393 if (error != 0) 1394 return (error); 1395 1396 control = NULL; 1397 1398 error = kern_getsockname(td, s, &sa, &datalen); 1399 if (error != 0) 1400 goto bad; 1401 sa_family = sa->sa_family; 1402 free(sa, M_SONAME); 1403 1404 if (flags & LINUX_MSG_OOB) { 1405 error = EOPNOTSUPP; 1406 if (sa_family == AF_UNIX) 1407 goto bad; 1408 1409 error = getsock(td, s, &cap_send_rights, &fp); 1410 if (error != 0) 1411 goto bad; 1412 so = fp->f_data; 1413 if (so->so_type != SOCK_STREAM) 1414 error = EOPNOTSUPP; 1415 fdrop(fp, td); 1416 if (error != 0) 1417 goto bad; 1418 } 1419 1420 if (linux_msghdr.msg_controllen >= sizeof(struct l_cmsghdr)) { 1421 error = ENOBUFS; 1422 control = m_get(M_WAITOK, MT_CONTROL); 1423 MCLGET(control, M_WAITOK); 1424 data = mtod(control, void *); 1425 datalen = 0; 1426 1427 ptr_cmsg = PTRIN(linux_msghdr.msg_control); 1428 clen = linux_msghdr.msg_controllen; 1429 do { 1430 error = copyin(ptr_cmsg, &linux_cmsg, 1431 sizeof(struct l_cmsghdr)); 1432 if (error != 0) 1433 goto bad; 1434 1435 error = EINVAL; 1436 if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr) || 1437 linux_cmsg.cmsg_len > clen) 1438 goto bad; 1439 1440 if (datalen + CMSG_HDRSZ > MCLBYTES) 1441 goto bad; 1442 1443 /* 1444 * Now we support only SCM_RIGHTS and SCM_CRED, 1445 * so return EINVAL in any other cmsg_type 1446 */ 1447 cmsg = data; 1448 cmsg->cmsg_type = 1449 linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); 1450 cmsg->cmsg_level = 1451 linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); 1452 if (cmsg->cmsg_type == -1 1453 || cmsg->cmsg_level != SOL_SOCKET) { 1454 linux_msg(curthread, 1455 "unsupported sendmsg cmsg level %d type %d", 1456 linux_cmsg.cmsg_level, linux_cmsg.cmsg_type); 1457 goto bad; 1458 } 1459 1460 /* 1461 * Some applications (e.g. pulseaudio) attempt to 1462 * send ancillary data even if the underlying protocol 1463 * doesn't support it which is not allowed in the 1464 * FreeBSD system call interface. 1465 */ 1466 if (sa_family != AF_UNIX) 1467 goto next; 1468 1469 if (cmsg->cmsg_type == SCM_CREDS) { 1470 len = sizeof(struct cmsgcred); 1471 if (datalen + CMSG_SPACE(len) > MCLBYTES) 1472 goto bad; 1473 1474 /* 1475 * The lower levels will fill in the structure 1476 */ 1477 memset(CMSG_DATA(data), 0, len); 1478 } else { 1479 len = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; 1480 if (datalen + CMSG_SPACE(len) < datalen || 1481 datalen + CMSG_SPACE(len) > MCLBYTES) 1482 goto bad; 1483 1484 error = copyin(LINUX_CMSG_DATA(ptr_cmsg), 1485 CMSG_DATA(data), len); 1486 if (error != 0) 1487 goto bad; 1488 } 1489 1490 cmsg->cmsg_len = CMSG_LEN(len); 1491 data = (char *)data + CMSG_SPACE(len); 1492 datalen += CMSG_SPACE(len); 1493 1494 next: 1495 if (clen <= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)) 1496 break; 1497 1498 clen -= LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len); 1499 ptr_cmsg = (struct l_cmsghdr *)((char *)ptr_cmsg + 1500 LINUX_CMSG_ALIGN(linux_cmsg.cmsg_len)); 1501 } while(clen >= sizeof(struct l_cmsghdr)); 1502 1503 control->m_len = datalen; 1504 if (datalen == 0) { 1505 m_freem(control); 1506 control = NULL; 1507 } 1508 } 1509 1510 msg.msg_iov = iov; 1511 msg.msg_flags = 0; 1512 error = linux_sendit(td, s, &msg, flags, control, UIO_USERSPACE); 1513 control = NULL; 1514 1515 bad: 1516 m_freem(control); 1517 free(iov, M_IOV); 1518 return (error); 1519 } 1520 1521 int 1522 linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) 1523 { 1524 1525 return (linux_sendmsg_common(td, args->s, PTRIN(args->msg), 1526 args->flags)); 1527 } 1528 1529 int 1530 linux_sendmmsg(struct thread *td, struct linux_sendmmsg_args *args) 1531 { 1532 struct l_mmsghdr *msg; 1533 l_uint retval; 1534 int error, datagrams; 1535 1536 if (args->vlen > UIO_MAXIOV) 1537 args->vlen = UIO_MAXIOV; 1538 1539 msg = PTRIN(args->msg); 1540 datagrams = 0; 1541 while (datagrams < args->vlen) { 1542 error = linux_sendmsg_common(td, args->s, &msg->msg_hdr, 1543 args->flags); 1544 if (error != 0) 1545 break; 1546 1547 retval = td->td_retval[0]; 1548 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1549 if (error != 0) 1550 break; 1551 ++msg; 1552 ++datagrams; 1553 } 1554 if (error == 0) 1555 td->td_retval[0] = datagrams; 1556 return (error); 1557 } 1558 1559 static int 1560 recvmsg_scm_rights(struct thread *td, l_uint flags, socklen_t *datalen, 1561 void **data, void **udata) 1562 { 1563 int i, fd, fds, *fdp; 1564 1565 if (flags & LINUX_MSG_CMSG_CLOEXEC) { 1566 fds = *datalen / sizeof(int); 1567 fdp = *data; 1568 for (i = 0; i < fds; i++) { 1569 fd = *fdp++; 1570 (void)kern_fcntl(td, fd, F_SETFD, FD_CLOEXEC); 1571 } 1572 } 1573 return (0); 1574 } 1575 1576 1577 static int 1578 recvmsg_scm_creds(socklen_t *datalen, void **data, void **udata) 1579 { 1580 struct cmsgcred *cmcred; 1581 struct l_ucred lu; 1582 1583 cmcred = *data; 1584 lu.pid = cmcred->cmcred_pid; 1585 lu.uid = cmcred->cmcred_uid; 1586 lu.gid = cmcred->cmcred_gid; 1587 memmove(*data, &lu, sizeof(lu)); 1588 *datalen = sizeof(lu); 1589 return (0); 1590 } 1591 _Static_assert(sizeof(struct cmsgcred) >= sizeof(struct l_ucred), 1592 "scm_creds sizeof l_ucred"); 1593 1594 static int 1595 recvmsg_scm_creds2(socklen_t *datalen, void **data, void **udata) 1596 { 1597 struct sockcred2 *scred; 1598 struct l_ucred lu; 1599 1600 scred = *data; 1601 lu.pid = scred->sc_pid; 1602 lu.uid = scred->sc_uid; 1603 lu.gid = scred->sc_gid; 1604 memmove(*data, &lu, sizeof(lu)); 1605 *datalen = sizeof(lu); 1606 return (0); 1607 } 1608 _Static_assert(sizeof(struct sockcred2) >= sizeof(struct l_ucred), 1609 "scm_creds2 sizeof l_ucred"); 1610 1611 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1612 static int 1613 recvmsg_scm_timestamp(l_int msg_type, socklen_t *datalen, void **data, 1614 void **udata) 1615 { 1616 l_sock_timeval ltv64; 1617 l_timeval ltv; 1618 struct timeval *tv; 1619 socklen_t len; 1620 void *buf; 1621 1622 if (*datalen != sizeof(struct timeval)) 1623 return (EMSGSIZE); 1624 1625 tv = *data; 1626 #if defined(COMPAT_LINUX32) 1627 if (msg_type == LINUX_SCM_TIMESTAMPO && 1628 (tv->tv_sec > INT_MAX || tv->tv_sec < INT_MIN)) 1629 return (EOVERFLOW); 1630 #endif 1631 if (msg_type == LINUX_SCM_TIMESTAMPN) 1632 len = sizeof(ltv64); 1633 else 1634 len = sizeof(ltv); 1635 1636 buf = malloc(len, M_LINUX, M_WAITOK); 1637 if (msg_type == LINUX_SCM_TIMESTAMPN) { 1638 ltv64.tv_sec = tv->tv_sec; 1639 ltv64.tv_usec = tv->tv_usec; 1640 memmove(buf, <v64, len); 1641 } else { 1642 ltv.tv_sec = tv->tv_sec; 1643 ltv.tv_usec = tv->tv_usec; 1644 memmove(buf, <v, len); 1645 } 1646 *data = *udata = buf; 1647 *datalen = len; 1648 return (0); 1649 } 1650 #else 1651 _Static_assert(sizeof(struct timeval) == sizeof(l_timeval), 1652 "scm_timestamp sizeof l_timeval"); 1653 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1654 1655 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1656 static int 1657 recvmsg_scm_timestampns(l_int msg_type, socklen_t *datalen, void **data, 1658 void **udata) 1659 { 1660 struct l_timespec64 ts64; 1661 struct l_timespec ts32; 1662 struct timespec ts; 1663 socklen_t len; 1664 void *buf; 1665 1666 if (msg_type == LINUX_SCM_TIMESTAMPNSO) 1667 len = sizeof(ts32); 1668 else 1669 len = sizeof(ts64); 1670 1671 buf = malloc(len, M_LINUX, M_WAITOK); 1672 bintime2timespec(*data, &ts); 1673 if (msg_type == LINUX_SCM_TIMESTAMPNSO) { 1674 ts32.tv_sec = ts.tv_sec; 1675 ts32.tv_nsec = ts.tv_nsec; 1676 memmove(buf, &ts32, len); 1677 } else { 1678 ts64.tv_sec = ts.tv_sec; 1679 ts64.tv_nsec = ts.tv_nsec; 1680 memmove(buf, &ts64, len); 1681 } 1682 *data = *udata = buf; 1683 *datalen = len; 1684 return (0); 1685 } 1686 #else 1687 static int 1688 recvmsg_scm_timestampns(l_int msg_type, socklen_t *datalen, void **data, 1689 void **udata) 1690 { 1691 struct timespec ts; 1692 1693 bintime2timespec(*data, &ts); 1694 memmove(*data, &ts, sizeof(struct timespec)); 1695 *datalen = sizeof(struct timespec); 1696 return (0); 1697 } 1698 _Static_assert(sizeof(struct bintime) >= sizeof(struct timespec), 1699 "scm_timestampns sizeof timespec"); 1700 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 1701 1702 static int 1703 recvmsg_scm_sol_socket(struct thread *td, l_int msg_type, l_int lmsg_type, 1704 l_uint flags, socklen_t *datalen, void **data, void **udata) 1705 { 1706 int error; 1707 1708 error = 0; 1709 switch (msg_type) { 1710 case SCM_RIGHTS: 1711 error = recvmsg_scm_rights(td, flags, datalen, 1712 data, udata); 1713 break; 1714 case SCM_CREDS: 1715 error = recvmsg_scm_creds(datalen, data, udata); 1716 break; 1717 case SCM_CREDS2: 1718 error = recvmsg_scm_creds2(datalen, data, udata); 1719 break; 1720 case SCM_TIMESTAMP: 1721 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 1722 error = recvmsg_scm_timestamp(lmsg_type, datalen, 1723 data, udata); 1724 #endif 1725 break; 1726 case SCM_BINTIME: 1727 error = recvmsg_scm_timestampns(lmsg_type, datalen, 1728 data, udata); 1729 break; 1730 } 1731 1732 return (error); 1733 } 1734 1735 static int 1736 recvmsg_scm_ip_origdstaddr(socklen_t *datalen, void **data, void **udata) 1737 { 1738 struct l_sockaddr *lsa; 1739 int error; 1740 1741 error = bsd_to_linux_sockaddr(*data, &lsa, *datalen); 1742 if (error == 0) { 1743 *data = *udata = lsa; 1744 *datalen = sizeof(*lsa); 1745 } 1746 return (error); 1747 } 1748 1749 static int 1750 recvmsg_scm_ipproto_ip(l_int msg_type, l_int lmsg_type, socklen_t *datalen, 1751 void **data, void **udata) 1752 { 1753 int error; 1754 1755 error = 0; 1756 switch (msg_type) { 1757 case IP_ORIGDSTADDR: 1758 error = recvmsg_scm_ip_origdstaddr(datalen, data, 1759 udata); 1760 break; 1761 } 1762 1763 return (error); 1764 } 1765 1766 static int 1767 linux_recvmsg_common(struct thread *td, l_int s, struct l_msghdr *msghdr, 1768 l_uint flags, struct msghdr *msg) 1769 { 1770 struct proc *p = td->td_proc; 1771 struct cmsghdr *cm; 1772 struct l_cmsghdr *lcm = NULL; 1773 socklen_t datalen, maxlen, outlen; 1774 struct l_msghdr l_msghdr; 1775 struct iovec *iov, *uiov; 1776 struct mbuf *m, *control = NULL; 1777 struct mbuf **controlp; 1778 struct sockaddr *sa; 1779 caddr_t outbuf; 1780 void *data, *udata; 1781 int error, skiped; 1782 1783 error = copyin(msghdr, &l_msghdr, sizeof(l_msghdr)); 1784 if (error != 0) 1785 return (error); 1786 1787 /* 1788 * Pass user-supplied recvmsg() flags in msg_flags field, 1789 * following sys_recvmsg() convention. 1790 */ 1791 l_msghdr.msg_flags = flags; 1792 1793 error = linux_to_bsd_msghdr(msg, &l_msghdr); 1794 if (error != 0) 1795 return (error); 1796 1797 #ifdef COMPAT_LINUX32 1798 error = freebsd32_copyiniov(PTRIN(msg->msg_iov), msg->msg_iovlen, 1799 &iov, EMSGSIZE); 1800 #else 1801 error = copyiniov(msg->msg_iov, msg->msg_iovlen, &iov, EMSGSIZE); 1802 #endif 1803 if (error != 0) 1804 return (error); 1805 1806 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1807 msg->msg_namelen = min(msg->msg_namelen, SOCK_MAXADDRLEN); 1808 sa = malloc(msg->msg_namelen, M_SONAME, M_WAITOK); 1809 msg->msg_name = sa; 1810 } else { 1811 sa = NULL; 1812 msg->msg_name = NULL; 1813 } 1814 1815 uiov = msg->msg_iov; 1816 msg->msg_iov = iov; 1817 controlp = (msg->msg_control != NULL) ? &control : NULL; 1818 error = kern_recvit(td, s, msg, UIO_SYSSPACE, controlp); 1819 msg->msg_iov = uiov; 1820 if (error != 0) 1821 goto bad; 1822 1823 /* 1824 * Note that kern_recvit() updates msg->msg_namelen. 1825 */ 1826 if (msg->msg_name != NULL && msg->msg_namelen > 0) { 1827 msg->msg_name = PTRIN(l_msghdr.msg_name); 1828 error = linux_copyout_sockaddr(sa, msg->msg_name, 1829 msg->msg_namelen); 1830 if (error != 0) 1831 goto bad; 1832 } 1833 1834 error = bsd_to_linux_msghdr(msg, &l_msghdr); 1835 if (error != 0) 1836 goto bad; 1837 1838 skiped = outlen = 0; 1839 maxlen = l_msghdr.msg_controllen; 1840 if (control == NULL) 1841 goto out; 1842 1843 lcm = malloc(L_CMSG_HDRSZ, M_LINUX, M_WAITOK | M_ZERO); 1844 msg->msg_control = mtod(control, struct cmsghdr *); 1845 msg->msg_controllen = control->m_len; 1846 outbuf = PTRIN(l_msghdr.msg_control); 1847 for (m = control; m != NULL; m = m->m_next) { 1848 cm = mtod(m, struct cmsghdr *); 1849 lcm->cmsg_type = bsd_to_linux_cmsg_type(p, cm->cmsg_type, 1850 cm->cmsg_level); 1851 lcm->cmsg_level = bsd_to_linux_sockopt_level(cm->cmsg_level); 1852 1853 if (lcm->cmsg_type == -1 || 1854 cm->cmsg_level == -1) { 1855 LINUX_RATELIMIT_MSG_OPT2( 1856 "unsupported recvmsg cmsg level %d type %d", 1857 cm->cmsg_level, cm->cmsg_type); 1858 /* Skip unsupported messages */ 1859 skiped++; 1860 continue; 1861 } 1862 data = CMSG_DATA(cm); 1863 datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; 1864 udata = NULL; 1865 error = 0; 1866 1867 switch (cm->cmsg_level) { 1868 case IPPROTO_IP: 1869 error = recvmsg_scm_ipproto_ip(cm->cmsg_type, 1870 lcm->cmsg_type, &datalen, &data, &udata); 1871 break; 1872 case SOL_SOCKET: 1873 error = recvmsg_scm_sol_socket(td, cm->cmsg_type, 1874 lcm->cmsg_type, flags, &datalen, &data, &udata); 1875 break; 1876 } 1877 1878 /* The recvmsg_scm_ is responsible to free udata on error. */ 1879 if (error != 0) 1880 goto bad; 1881 1882 if (outlen + LINUX_CMSG_LEN(datalen) > maxlen) { 1883 if (outlen == 0) { 1884 error = EMSGSIZE; 1885 goto err; 1886 } else { 1887 l_msghdr.msg_flags |= LINUX_MSG_CTRUNC; 1888 m_dispose_extcontrolm(control); 1889 free(udata, M_LINUX); 1890 goto out; 1891 } 1892 } 1893 1894 lcm->cmsg_len = LINUX_CMSG_LEN(datalen); 1895 error = copyout(lcm, outbuf, L_CMSG_HDRSZ); 1896 if (error == 0) { 1897 error = copyout(data, LINUX_CMSG_DATA(outbuf), datalen); 1898 if (error == 0) { 1899 outbuf += LINUX_CMSG_SPACE(datalen); 1900 outlen += LINUX_CMSG_SPACE(datalen); 1901 } 1902 } 1903 err: 1904 free(udata, M_LINUX); 1905 if (error != 0) 1906 goto bad; 1907 } 1908 if (outlen == 0 && skiped > 0) { 1909 error = EINVAL; 1910 goto bad; 1911 } 1912 1913 out: 1914 l_msghdr.msg_controllen = outlen; 1915 error = copyout(&l_msghdr, msghdr, sizeof(l_msghdr)); 1916 1917 bad: 1918 if (control != NULL) { 1919 if (error != 0) 1920 m_dispose_extcontrolm(control); 1921 m_freem(control); 1922 } 1923 free(iov, M_IOV); 1924 free(lcm, M_LINUX); 1925 free(sa, M_SONAME); 1926 1927 return (error); 1928 } 1929 1930 int 1931 linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) 1932 { 1933 struct msghdr bsd_msg; 1934 struct file *fp; 1935 int error; 1936 1937 error = getsock(td, args->s, &cap_recv_rights, &fp); 1938 if (error != 0) 1939 return (error); 1940 fdrop(fp, td); 1941 return (linux_recvmsg_common(td, args->s, PTRIN(args->msg), 1942 args->flags, &bsd_msg)); 1943 } 1944 1945 static int 1946 linux_recvmmsg_common(struct thread *td, l_int s, struct l_mmsghdr *msg, 1947 l_uint vlen, l_uint flags, struct timespec *tts) 1948 { 1949 struct msghdr bsd_msg; 1950 struct timespec ts; 1951 struct file *fp; 1952 l_uint retval; 1953 int error, datagrams; 1954 1955 error = getsock(td, s, &cap_recv_rights, &fp); 1956 if (error != 0) 1957 return (error); 1958 datagrams = 0; 1959 while (datagrams < vlen) { 1960 error = linux_recvmsg_common(td, s, &msg->msg_hdr, 1961 flags & ~LINUX_MSG_WAITFORONE, &bsd_msg); 1962 if (error != 0) 1963 break; 1964 1965 retval = td->td_retval[0]; 1966 error = copyout(&retval, &msg->msg_len, sizeof(msg->msg_len)); 1967 if (error != 0) 1968 break; 1969 ++msg; 1970 ++datagrams; 1971 1972 /* 1973 * MSG_WAITFORONE turns on MSG_DONTWAIT after one packet. 1974 */ 1975 if (flags & LINUX_MSG_WAITFORONE) 1976 flags |= LINUX_MSG_DONTWAIT; 1977 1978 /* 1979 * See BUGS section of recvmmsg(2). 1980 */ 1981 if (tts) { 1982 getnanotime(&ts); 1983 timespecsub(&ts, tts, &ts); 1984 if (!timespecisset(&ts) || ts.tv_sec > 0) 1985 break; 1986 } 1987 /* Out of band data, return right away. */ 1988 if (bsd_msg.msg_flags & MSG_OOB) 1989 break; 1990 } 1991 if (error == 0) 1992 td->td_retval[0] = datagrams; 1993 fdrop(fp, td); 1994 return (error); 1995 } 1996 1997 int 1998 linux_recvmmsg(struct thread *td, struct linux_recvmmsg_args *args) 1999 { 2000 struct timespec ts, tts, *ptts; 2001 int error; 2002 2003 if (args->timeout) { 2004 error = linux_get_timespec(&ts, args->timeout); 2005 if (error != 0) 2006 return (error); 2007 getnanotime(&tts); 2008 timespecadd(&tts, &ts, &tts); 2009 ptts = &tts; 2010 } 2011 else ptts = NULL; 2012 2013 return (linux_recvmmsg_common(td, args->s, PTRIN(args->msg), 2014 args->vlen, args->flags, ptts)); 2015 } 2016 2017 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 2018 int 2019 linux_recvmmsg_time64(struct thread *td, struct linux_recvmmsg_time64_args *args) 2020 { 2021 struct timespec ts, tts, *ptts; 2022 int error; 2023 2024 if (args->timeout) { 2025 error = linux_get_timespec64(&ts, args->timeout); 2026 if (error != 0) 2027 return (error); 2028 getnanotime(&tts); 2029 timespecadd(&tts, &ts, &tts); 2030 ptts = &tts; 2031 } 2032 else ptts = NULL; 2033 2034 return (linux_recvmmsg_common(td, args->s, PTRIN(args->msg), 2035 args->vlen, args->flags, ptts)); 2036 } 2037 #endif 2038 2039 int 2040 linux_shutdown(struct thread *td, struct linux_shutdown_args *args) 2041 { 2042 2043 return (kern_shutdown(td, args->s, args->how)); 2044 } 2045 2046 int 2047 linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) 2048 { 2049 struct proc *p = td->td_proc; 2050 struct linux_pemuldata *pem; 2051 l_timeval linux_tv; 2052 struct sockaddr *sa; 2053 struct timeval tv; 2054 socklen_t len; 2055 int error, level, name, val; 2056 2057 level = linux_to_bsd_sockopt_level(args->level); 2058 switch (level) { 2059 case SOL_SOCKET: 2060 name = linux_to_bsd_so_sockopt(args->optname); 2061 switch (name) { 2062 case LOCAL_CREDS_PERSISTENT: 2063 level = SOL_LOCAL; 2064 break; 2065 case SO_RCVTIMEO: 2066 /* FALLTHROUGH */ 2067 case SO_SNDTIMEO: 2068 error = copyin(PTRIN(args->optval), &linux_tv, 2069 sizeof(linux_tv)); 2070 if (error != 0) 2071 return (error); 2072 tv.tv_sec = linux_tv.tv_sec; 2073 tv.tv_usec = linux_tv.tv_usec; 2074 return (kern_setsockopt(td, args->s, level, 2075 name, &tv, UIO_SYSSPACE, sizeof(tv))); 2076 /* NOTREACHED */ 2077 case SO_TIMESTAMP: 2078 /* overwrite SO_BINTIME */ 2079 val = 0; 2080 error = kern_setsockopt(td, args->s, level, 2081 SO_BINTIME, &val, UIO_SYSSPACE, sizeof(val)); 2082 if (error != 0) 2083 return (error); 2084 pem = pem_find(p); 2085 pem->so_timestamp = args->optname; 2086 break; 2087 case SO_BINTIME: 2088 /* overwrite SO_TIMESTAMP */ 2089 val = 0; 2090 error = kern_setsockopt(td, args->s, level, 2091 SO_TIMESTAMP, &val, UIO_SYSSPACE, sizeof(val)); 2092 if (error != 0) 2093 return (error); 2094 pem = pem_find(p); 2095 pem->so_timestampns = args->optname; 2096 break; 2097 default: 2098 break; 2099 } 2100 break; 2101 case IPPROTO_IP: 2102 if (args->optname == LINUX_IP_RECVERR && 2103 linux_ignore_ip_recverr) { 2104 /* 2105 * XXX: This is a hack to unbreak DNS resolution 2106 * with glibc 2.30 and above. 2107 */ 2108 return (0); 2109 } 2110 name = linux_to_bsd_ip_sockopt(args->optname); 2111 break; 2112 case IPPROTO_IPV6: 2113 name = linux_to_bsd_ip6_sockopt(args->optname); 2114 break; 2115 case IPPROTO_TCP: 2116 name = linux_to_bsd_tcp_sockopt(args->optname); 2117 break; 2118 case SOL_NETLINK: 2119 level = SOL_SOCKET; 2120 name = args->optname; 2121 break; 2122 default: 2123 name = -1; 2124 break; 2125 } 2126 if (name < 0) { 2127 if (name == -1) 2128 linux_msg(curthread, 2129 "unsupported setsockopt level %d optname %d", 2130 args->level, args->optname); 2131 return (ENOPROTOOPT); 2132 } 2133 2134 if (name == IPV6_NEXTHOP) { 2135 len = args->optlen; 2136 error = linux_to_bsd_sockaddr(PTRIN(args->optval), &sa, &len); 2137 if (error != 0) 2138 return (error); 2139 2140 error = kern_setsockopt(td, args->s, level, 2141 name, sa, UIO_SYSSPACE, len); 2142 free(sa, M_SONAME); 2143 } else { 2144 error = kern_setsockopt(td, args->s, level, 2145 name, PTRIN(args->optval), UIO_USERSPACE, args->optlen); 2146 } 2147 2148 return (error); 2149 } 2150 2151 static int 2152 linux_sockopt_copyout(struct thread *td, void *val, socklen_t len, 2153 struct linux_getsockopt_args *args) 2154 { 2155 int error; 2156 2157 error = copyout(val, PTRIN(args->optval), len); 2158 if (error == 0) 2159 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2160 return (error); 2161 } 2162 2163 static int 2164 linux_getsockopt_so_peergroups(struct thread *td, 2165 struct linux_getsockopt_args *args) 2166 { 2167 struct xucred xu; 2168 socklen_t xulen, len; 2169 int error, i; 2170 2171 xulen = sizeof(xu); 2172 error = kern_getsockopt(td, args->s, 0, 2173 LOCAL_PEERCRED, &xu, UIO_SYSSPACE, &xulen); 2174 if (error != 0) 2175 return (error); 2176 2177 len = xu.cr_ngroups * sizeof(l_gid_t); 2178 if (args->optlen < len) { 2179 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2180 if (error == 0) 2181 error = ERANGE; 2182 return (error); 2183 } 2184 2185 /* 2186 * "- 1" to skip the primary group. 2187 */ 2188 for (i = 0; i < xu.cr_ngroups - 1; i++) { 2189 error = copyout(xu.cr_groups + i + 1, 2190 (void *)(args->optval + i * sizeof(l_gid_t)), 2191 sizeof(l_gid_t)); 2192 if (error != 0) 2193 return (error); 2194 } 2195 2196 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2197 return (error); 2198 } 2199 2200 static int 2201 linux_getsockopt_so_peersec(struct thread *td, 2202 struct linux_getsockopt_args *args) 2203 { 2204 socklen_t len; 2205 int error; 2206 2207 len = sizeof(SECURITY_CONTEXT_STRING); 2208 if (args->optlen < len) { 2209 error = copyout(&len, PTRIN(args->optlen), sizeof(len)); 2210 if (error == 0) 2211 error = ERANGE; 2212 return (error); 2213 } 2214 2215 return (linux_sockopt_copyout(td, SECURITY_CONTEXT_STRING, 2216 len, args)); 2217 } 2218 2219 static int 2220 linux_getsockopt_so_linger(struct thread *td, 2221 struct linux_getsockopt_args *args) 2222 { 2223 struct linger ling; 2224 socklen_t len; 2225 int error; 2226 2227 len = sizeof(ling); 2228 error = kern_getsockopt(td, args->s, SOL_SOCKET, 2229 SO_LINGER, &ling, UIO_SYSSPACE, &len); 2230 if (error != 0) 2231 return (error); 2232 ling.l_onoff = ((ling.l_onoff & SO_LINGER) != 0); 2233 return (linux_sockopt_copyout(td, &ling, len, args)); 2234 } 2235 2236 int 2237 linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) 2238 { 2239 l_timeval linux_tv; 2240 struct timeval tv; 2241 socklen_t tv_len, xulen, len; 2242 struct sockaddr *sa; 2243 struct xucred xu; 2244 struct l_ucred lxu; 2245 int error, level, name, newval; 2246 2247 level = linux_to_bsd_sockopt_level(args->level); 2248 switch (level) { 2249 case SOL_SOCKET: 2250 switch (args->optname) { 2251 case LINUX_SO_PEERGROUPS: 2252 return (linux_getsockopt_so_peergroups(td, args)); 2253 case LINUX_SO_PEERSEC: 2254 return (linux_getsockopt_so_peersec(td, args)); 2255 default: 2256 break; 2257 } 2258 2259 name = linux_to_bsd_so_sockopt(args->optname); 2260 switch (name) { 2261 case LOCAL_CREDS_PERSISTENT: 2262 level = SOL_LOCAL; 2263 break; 2264 case SO_RCVTIMEO: 2265 /* FALLTHROUGH */ 2266 case SO_SNDTIMEO: 2267 tv_len = sizeof(tv); 2268 error = kern_getsockopt(td, args->s, level, 2269 name, &tv, UIO_SYSSPACE, &tv_len); 2270 if (error != 0) 2271 return (error); 2272 linux_tv.tv_sec = tv.tv_sec; 2273 linux_tv.tv_usec = tv.tv_usec; 2274 return (linux_sockopt_copyout(td, &linux_tv, 2275 sizeof(linux_tv), args)); 2276 /* NOTREACHED */ 2277 case LOCAL_PEERCRED: 2278 if (args->optlen < sizeof(lxu)) 2279 return (EINVAL); 2280 /* 2281 * LOCAL_PEERCRED is not served at the SOL_SOCKET level, 2282 * but by the Unix socket's level 0. 2283 */ 2284 level = 0; 2285 xulen = sizeof(xu); 2286 error = kern_getsockopt(td, args->s, level, 2287 name, &xu, UIO_SYSSPACE, &xulen); 2288 if (error != 0) 2289 return (error); 2290 lxu.pid = xu.cr_pid; 2291 lxu.uid = xu.cr_uid; 2292 lxu.gid = xu.cr_gid; 2293 return (linux_sockopt_copyout(td, &lxu, 2294 sizeof(lxu), args)); 2295 /* NOTREACHED */ 2296 case SO_ERROR: 2297 len = sizeof(newval); 2298 error = kern_getsockopt(td, args->s, level, 2299 name, &newval, UIO_SYSSPACE, &len); 2300 if (error != 0) 2301 return (error); 2302 newval = -bsd_to_linux_errno(newval); 2303 return (linux_sockopt_copyout(td, &newval, 2304 len, args)); 2305 /* NOTREACHED */ 2306 case SO_DOMAIN: 2307 len = sizeof(newval); 2308 error = kern_getsockopt(td, args->s, level, 2309 name, &newval, UIO_SYSSPACE, &len); 2310 if (error != 0) 2311 return (error); 2312 newval = bsd_to_linux_domain(newval); 2313 if (newval == -1) 2314 return (ENOPROTOOPT); 2315 return (linux_sockopt_copyout(td, &newval, 2316 len, args)); 2317 /* NOTREACHED */ 2318 case SO_LINGER: 2319 return (linux_getsockopt_so_linger(td, args)); 2320 /* NOTREACHED */ 2321 default: 2322 break; 2323 } 2324 break; 2325 case IPPROTO_IP: 2326 name = linux_to_bsd_ip_sockopt(args->optname); 2327 break; 2328 case IPPROTO_IPV6: 2329 name = linux_to_bsd_ip6_sockopt(args->optname); 2330 break; 2331 case IPPROTO_TCP: 2332 name = linux_to_bsd_tcp_sockopt(args->optname); 2333 break; 2334 default: 2335 name = -1; 2336 break; 2337 } 2338 if (name < 0) { 2339 if (name == -1) 2340 linux_msg(curthread, 2341 "unsupported getsockopt level %d optname %d", 2342 args->level, args->optname); 2343 return (EINVAL); 2344 } 2345 2346 if (name == IPV6_NEXTHOP) { 2347 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 2348 if (error != 0) 2349 return (error); 2350 sa = malloc(len, M_SONAME, M_WAITOK); 2351 2352 error = kern_getsockopt(td, args->s, level, 2353 name, sa, UIO_SYSSPACE, &len); 2354 if (error != 0) 2355 goto out; 2356 2357 error = linux_copyout_sockaddr(sa, PTRIN(args->optval), len); 2358 if (error == 0) 2359 error = copyout(&len, PTRIN(args->optlen), 2360 sizeof(len)); 2361 out: 2362 free(sa, M_SONAME); 2363 } else { 2364 if (args->optval) { 2365 error = copyin(PTRIN(args->optlen), &len, sizeof(len)); 2366 if (error != 0) 2367 return (error); 2368 } 2369 error = kern_getsockopt(td, args->s, level, 2370 name, PTRIN(args->optval), UIO_USERSPACE, &len); 2371 if (error == 0) 2372 error = copyout(&len, PTRIN(args->optlen), 2373 sizeof(len)); 2374 } 2375 2376 return (error); 2377 } 2378 2379 /* 2380 * Based on sendfile_getsock from kern_sendfile.c 2381 * Determines whether an fd is a stream socket that can be used 2382 * with FreeBSD sendfile. 2383 */ 2384 static bool 2385 is_sendfile(struct file *fp, struct file *ofp) 2386 { 2387 struct socket *so; 2388 2389 /* 2390 * FreeBSD sendfile() system call sends a regular file or 2391 * shared memory object out a stream socket. 2392 */ 2393 if ((fp->f_type != DTYPE_SHM && fp->f_type != DTYPE_VNODE) || 2394 (fp->f_type == DTYPE_VNODE && 2395 (fp->f_vnode == NULL || fp->f_vnode->v_type != VREG))) 2396 return (false); 2397 /* 2398 * The socket must be a stream socket and connected. 2399 */ 2400 if (ofp->f_type != DTYPE_SOCKET) 2401 return (false); 2402 so = ofp->f_data; 2403 if (so->so_type != SOCK_STREAM) 2404 return (false); 2405 /* 2406 * SCTP one-to-one style sockets currently don't work with 2407 * sendfile(). 2408 */ 2409 if (so->so_proto->pr_protocol == IPPROTO_SCTP) 2410 return (false); 2411 return (!SOLISTENING(so)); 2412 } 2413 2414 static bool 2415 is_regular_file(struct file *fp) 2416 { 2417 2418 return (fp->f_type == DTYPE_VNODE && fp->f_vnode != NULL && 2419 fp->f_vnode->v_type == VREG); 2420 } 2421 2422 static int 2423 sendfile_fallback(struct thread *td, struct file *fp, l_int out, 2424 off_t *offset, l_size_t count, off_t *sbytes) 2425 { 2426 off_t current_offset, out_offset, to_send; 2427 l_size_t bytes_sent, n_read; 2428 struct file *ofp; 2429 struct iovec aiov; 2430 struct uio auio; 2431 bool seekable; 2432 size_t bufsz; 2433 void *buf; 2434 int flags, error; 2435 2436 if (offset == NULL) { 2437 if ((error = fo_seek(fp, 0, SEEK_CUR, td)) != 0) 2438 return (error); 2439 current_offset = td->td_uretoff.tdu_off; 2440 } else { 2441 if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) 2442 return (ESPIPE); 2443 current_offset = *offset; 2444 } 2445 error = fget_write(td, out, &cap_pwrite_rights, &ofp); 2446 if (error != 0) 2447 return (error); 2448 seekable = (ofp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0; 2449 if (seekable) { 2450 if ((error = fo_seek(ofp, 0, SEEK_CUR, td)) != 0) 2451 goto drop; 2452 out_offset = td->td_uretoff.tdu_off; 2453 } else 2454 out_offset = 0; 2455 2456 flags = FOF_OFFSET | FOF_NOUPDATE; 2457 bufsz = min(count, MAXPHYS); 2458 buf = malloc(bufsz, M_LINUX, M_WAITOK); 2459 bytes_sent = 0; 2460 while (bytes_sent < count) { 2461 to_send = min(count - bytes_sent, bufsz); 2462 aiov.iov_base = buf; 2463 aiov.iov_len = bufsz; 2464 auio.uio_iov = &aiov; 2465 auio.uio_iovcnt = 1; 2466 auio.uio_segflg = UIO_SYSSPACE; 2467 auio.uio_td = td; 2468 auio.uio_rw = UIO_READ; 2469 auio.uio_offset = current_offset; 2470 auio.uio_resid = to_send; 2471 error = fo_read(fp, &auio, fp->f_cred, flags, td); 2472 if (error != 0) 2473 break; 2474 n_read = to_send - auio.uio_resid; 2475 if (n_read == 0) 2476 break; 2477 aiov.iov_base = buf; 2478 aiov.iov_len = bufsz; 2479 auio.uio_iov = &aiov; 2480 auio.uio_iovcnt = 1; 2481 auio.uio_segflg = UIO_SYSSPACE; 2482 auio.uio_td = td; 2483 auio.uio_rw = UIO_WRITE; 2484 auio.uio_offset = (seekable) ? out_offset : 0; 2485 auio.uio_resid = n_read; 2486 error = fo_write(ofp, &auio, ofp->f_cred, flags, td); 2487 if (error != 0) 2488 break; 2489 bytes_sent += n_read; 2490 current_offset += n_read; 2491 out_offset += n_read; 2492 } 2493 free(buf, M_LINUX); 2494 2495 if (error == 0) { 2496 *sbytes = bytes_sent; 2497 if (offset != NULL) 2498 *offset = current_offset; 2499 else 2500 error = fo_seek(fp, current_offset, SEEK_SET, td); 2501 } 2502 if (error == 0 && seekable) 2503 error = fo_seek(ofp, out_offset, SEEK_SET, td); 2504 2505 drop: 2506 fdrop(ofp, td); 2507 return (error); 2508 } 2509 2510 static int 2511 sendfile_sendfile(struct thread *td, struct file *fp, l_int out, 2512 off_t *offset, l_size_t count, off_t *sbytes) 2513 { 2514 off_t current_offset; 2515 int error; 2516 2517 if (offset == NULL) { 2518 if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) 2519 return (ESPIPE); 2520 if ((error = fo_seek(fp, 0, SEEK_CUR, td)) != 0) 2521 return (error); 2522 current_offset = td->td_uretoff.tdu_off; 2523 } else 2524 current_offset = *offset; 2525 error = fo_sendfile(fp, out, NULL, NULL, current_offset, count, 2526 sbytes, 0, td); 2527 if (error == 0) { 2528 current_offset += *sbytes; 2529 if (offset != NULL) 2530 *offset = current_offset; 2531 else 2532 error = fo_seek(fp, current_offset, SEEK_SET, td); 2533 } 2534 return (error); 2535 } 2536 2537 static int 2538 linux_sendfile_common(struct thread *td, l_int out, l_int in, 2539 off_t *offset, l_size_t count) 2540 { 2541 struct file *fp, *ofp; 2542 off_t sbytes; 2543 int error; 2544 2545 /* Linux cannot have 0 count. */ 2546 if (count <= 0 || (offset != NULL && *offset < 0)) 2547 return (EINVAL); 2548 2549 AUDIT_ARG_FD(in); 2550 error = fget_read(td, in, &cap_pread_rights, &fp); 2551 if (error != 0) 2552 return (error); 2553 if ((fp->f_type != DTYPE_SHM && fp->f_type != DTYPE_VNODE) || 2554 (fp->f_type == DTYPE_VNODE && 2555 (fp->f_vnode == NULL || fp->f_vnode->v_type != VREG))) { 2556 error = EINVAL; 2557 goto drop; 2558 } 2559 error = fget_unlocked(td, out, &cap_no_rights, &ofp); 2560 if (error != 0) 2561 goto drop; 2562 2563 if (is_regular_file(fp) && is_regular_file(ofp)) { 2564 error = kern_copy_file_range(td, in, offset, out, NULL, count, 2565 0); 2566 } else { 2567 sbytes = 0; 2568 if (is_sendfile(fp, ofp)) 2569 error = sendfile_sendfile(td, fp, out, offset, count, 2570 &sbytes); 2571 else 2572 error = sendfile_fallback(td, fp, out, offset, count, 2573 &sbytes); 2574 if (error == ENOBUFS && (ofp->f_flag & FNONBLOCK) != 0) 2575 error = EAGAIN; 2576 if (error == 0) 2577 td->td_retval[0] = sbytes; 2578 } 2579 fdrop(ofp, td); 2580 2581 drop: 2582 fdrop(fp, td); 2583 return (error); 2584 } 2585 2586 int 2587 linux_sendfile(struct thread *td, struct linux_sendfile_args *arg) 2588 { 2589 /* 2590 * Differences between FreeBSD and Linux sendfile: 2591 * - Linux doesn't send anything when count is 0 (FreeBSD uses 0 to 2592 * mean send the whole file). 2593 * - Linux can send to any fd whereas FreeBSD only supports sockets. 2594 * We therefore use FreeBSD sendfile where possible for performance, 2595 * but fall back on a manual copy (sendfile_fallback). 2596 * - Linux doesn't have an equivalent for FreeBSD's flags and sf_hdtr. 2597 * - Linux takes an offset pointer and updates it to the read location. 2598 * FreeBSD takes in an offset and a 'bytes read' parameter which is 2599 * only filled if it isn't NULL. We use this parameter to update the 2600 * offset pointer if it exists. 2601 * - Linux sendfile returns bytes read on success while FreeBSD 2602 * returns 0. We use the 'bytes read' parameter to get this value. 2603 */ 2604 2605 off_t offset64; 2606 l_off_t offset; 2607 int error; 2608 2609 if (arg->offset != NULL) { 2610 error = copyin(arg->offset, &offset, sizeof(offset)); 2611 if (error != 0) 2612 return (error); 2613 offset64 = offset; 2614 } 2615 2616 error = linux_sendfile_common(td, arg->out, arg->in, 2617 arg->offset != NULL ? &offset64 : NULL, arg->count); 2618 2619 if (error == 0 && arg->offset != NULL) { 2620 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 2621 if (offset64 > INT32_MAX) 2622 return (EOVERFLOW); 2623 #endif 2624 offset = (l_off_t)offset64; 2625 error = copyout(&offset, arg->offset, sizeof(offset)); 2626 } 2627 2628 return (error); 2629 } 2630 2631 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 2632 int 2633 linux_sendfile64(struct thread *td, struct linux_sendfile64_args *arg) 2634 { 2635 off_t offset; 2636 int error; 2637 2638 if (arg->offset != NULL) { 2639 error = copyin(arg->offset, &offset, sizeof(offset)); 2640 if (error != 0) 2641 return (error); 2642 } 2643 2644 error = linux_sendfile_common(td, arg->out, arg->in, 2645 arg->offset != NULL ? &offset : NULL, arg->count); 2646 2647 if (error == 0 && arg->offset != NULL) 2648 error = copyout(&offset, arg->offset, sizeof(offset)); 2649 2650 return (error); 2651 } 2652 2653 /* Argument list sizes for linux_socketcall */ 2654 static const unsigned char lxs_args_cnt[] = { 2655 0 /* unused*/, 3 /* socket */, 2656 3 /* bind */, 3 /* connect */, 2657 2 /* listen */, 3 /* accept */, 2658 3 /* getsockname */, 3 /* getpeername */, 2659 4 /* socketpair */, 4 /* send */, 2660 4 /* recv */, 6 /* sendto */, 2661 6 /* recvfrom */, 2 /* shutdown */, 2662 5 /* setsockopt */, 5 /* getsockopt */, 2663 3 /* sendmsg */, 3 /* recvmsg */, 2664 4 /* accept4 */, 5 /* recvmmsg */, 2665 4 /* sendmmsg */, 4 /* sendfile */ 2666 }; 2667 #define LINUX_ARGS_CNT (nitems(lxs_args_cnt) - 1) 2668 #define LINUX_ARG_SIZE(x) (lxs_args_cnt[x] * sizeof(l_ulong)) 2669 2670 int 2671 linux_socketcall(struct thread *td, struct linux_socketcall_args *args) 2672 { 2673 l_ulong a[6]; 2674 #if defined(__amd64__) && defined(COMPAT_LINUX32) 2675 register_t l_args[6]; 2676 #endif 2677 void *arg; 2678 int error; 2679 2680 if (args->what < LINUX_SOCKET || args->what > LINUX_ARGS_CNT) 2681 return (EINVAL); 2682 error = copyin(PTRIN(args->args), a, LINUX_ARG_SIZE(args->what)); 2683 if (error != 0) 2684 return (error); 2685 2686 #if defined(__amd64__) && defined(COMPAT_LINUX32) 2687 for (int i = 0; i < lxs_args_cnt[args->what]; ++i) 2688 l_args[i] = a[i]; 2689 arg = l_args; 2690 #else 2691 arg = a; 2692 #endif 2693 switch (args->what) { 2694 case LINUX_SOCKET: 2695 return (linux_socket(td, arg)); 2696 case LINUX_BIND: 2697 return (linux_bind(td, arg)); 2698 case LINUX_CONNECT: 2699 return (linux_connect(td, arg)); 2700 case LINUX_LISTEN: 2701 return (linux_listen(td, arg)); 2702 case LINUX_ACCEPT: 2703 return (linux_accept(td, arg)); 2704 case LINUX_GETSOCKNAME: 2705 return (linux_getsockname(td, arg)); 2706 case LINUX_GETPEERNAME: 2707 return (linux_getpeername(td, arg)); 2708 case LINUX_SOCKETPAIR: 2709 return (linux_socketpair(td, arg)); 2710 case LINUX_SEND: 2711 return (linux_send(td, arg)); 2712 case LINUX_RECV: 2713 return (linux_recv(td, arg)); 2714 case LINUX_SENDTO: 2715 return (linux_sendto(td, arg)); 2716 case LINUX_RECVFROM: 2717 return (linux_recvfrom(td, arg)); 2718 case LINUX_SHUTDOWN: 2719 return (linux_shutdown(td, arg)); 2720 case LINUX_SETSOCKOPT: 2721 return (linux_setsockopt(td, arg)); 2722 case LINUX_GETSOCKOPT: 2723 return (linux_getsockopt(td, arg)); 2724 case LINUX_SENDMSG: 2725 return (linux_sendmsg(td, arg)); 2726 case LINUX_RECVMSG: 2727 return (linux_recvmsg(td, arg)); 2728 case LINUX_ACCEPT4: 2729 return (linux_accept4(td, arg)); 2730 case LINUX_RECVMMSG: 2731 return (linux_recvmmsg(td, arg)); 2732 case LINUX_SENDMMSG: 2733 return (linux_sendmmsg(td, arg)); 2734 case LINUX_SENDFILE: 2735 return (linux_sendfile(td, arg)); 2736 } 2737 2738 linux_msg(td, "socket type %d not implemented", args->what); 2739 return (ENOSYS); 2740 } 2741 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 2742