release/src/router/openvpn/syshead.h

   1 /*
   2  *  OpenVPN -- An application to securely tunnel IP networks
   3  *             over a single UDP port, with support for SSL/TLS-based
   4  *             session authentication and key exchange,
   5  *             packet encryption, packet authentication, and
   6  *             packet compression.
   7  *
   8  *  Copyright (C) 2002-2009 OpenVPN Technologies, Inc. <sales@openvpn.net>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License version 2
  12  *  as published by the Free Software Foundation.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program (see the file COPYING included with this
  21  *  distribution); if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #ifndef SYSHEAD_H
  26 #define SYSHEAD_H
  27
  28 /*
  29  * Only include if not during configure
  30  */
  31 #ifndef PACKAGE_NAME
  32 #ifdef _MSC_VER
  33 #include "config-win32.h"
  34 #else
  35 #include "config.h"
  36 #endif
  37 #endif
  38
  39 /* branch prediction hints */
  40 #if defined(__GNUC__)
  41 # define likely(x)       __builtin_expect((x),1)
  42 # define unlikely(x)     __builtin_expect((x),0)
  43 #else
  44 # define likely(x)      (x)
  45 # define unlikely(x)    (x)
  46 #endif
  47
  48 #if defined(_WIN32) && !defined(WIN32)
  49 #define WIN32
  50 #endif
  51
  52 #ifdef WIN32
  53 #include <windows.h>
  54 #define sleep(x) Sleep((x)*1000)
  55 #define random rand
  56 #define srandom srand
  57 #endif
  58
  59 #ifdef HAVE_SYS_TYPES_H
  60 #include <sys/types.h>
  61 #endif
  62
  63 #ifdef HAVE_SYS_WAIT_H
  64 # include <sys/wait.h>
  65 #endif
  66
  67 #ifndef WIN32
  68 #ifndef WEXITSTATUS
  69 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
  70 #endif
  71 #ifndef WIFEXITED
  72 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
  73 #endif
  74 #endif
  75
  76 #ifdef TIME_WITH_SYS_TIME
  77 # include <sys/time.h>
  78 # include <time.h>
  79 #else
  80 # ifdef HAVE_SYS_TIME_H
  81 #  include <sys/time.h>
  82 # else
  83 #  include <time.h>
  84 # endif
  85 #endif
  86
  87 #ifdef HAVE_SYS_SOCKET_H
  88 #include <sys/socket.h>
  89 #endif
  90
  91 #ifdef HAVE_SYS_UN_H
  92 #include <sys/un.h>
  93 #endif
  94
  95 #ifdef HAVE_SYS_IOCTL_H
  96 #include <sys/ioctl.h>
  97 #endif
  98
  99 #ifdef HAVE_SYS_STAT_H
 100 #include <sys/stat.h>
 101 #endif
 102
 103 #ifdef HAVE_FCNTL_H
 104 #include <fcntl.h>
 105 #endif
 106
 107 #ifdef HAVE_SYS_FILE_H
 108 #include <sys/file.h>
 109 #endif
 110
 111 #ifdef HAVE_STDLIB_H
 112 #include <stdlib.h>
 113 #endif
 114
 115 #ifdef HAVE_STDINT_H
 116 #include <stdint.h>
 117 #endif
 118
 119 #ifdef HAVE_STDARG_H
 120 #include <stdarg.h>
 121 #endif
 122
 123 #ifdef HAVE_UNISTD_H
 124 #include <unistd.h>
 125 #endif
 126
 127 #ifdef HAVE_SIGNAL_H
 128 #include <signal.h>
 129 #endif
 130
 131 #ifdef HAVE_STDIO_H
 132 #include <stdio.h>
 133 #endif
 134
 135 #ifdef HAVE_CTYPE_H
 136 #include <ctype.h>
 137 #endif
 138
 139 #ifdef HAVE_ERRNO_H
 140 #include <errno.h>
 141 #endif
 142
 143 #ifdef HAVE_ERR_H
 144 #include <err.h>
 145 #endif
 146
 147 #ifdef HAVE_SYSLOG_H
 148 #include <syslog.h>
 149 #endif
 150
 151 #ifdef HAVE_PWD_H
 152 #include <pwd.h>
 153 #endif
 154
 155 #ifdef HAVE_GRP_H
 156 #include <grp.h>
 157 #endif
 158
 159 #ifdef USE_LIBDL
 160 #include <dlfcn.h>
 161 #endif
 162
 163 #ifdef HAVE_NETDB_H
 164 #include <netdb.h>
 165 #endif
 166
 167 #ifdef HAVE_NETINET_IN_H
 168 #include <netinet/in.h>
 169 #endif
 170
 171 #ifdef HAVE_RESOLV_H
 172 #include <resolv.h>
 173 #endif
 174
 175 #ifdef HAVE_SYS_POLL_H
 176 #include <sys/poll.h>
 177 #endif
 178
 179 #ifdef HAVE_SYS_EPOLL_H
 180 #include <sys/epoll.h>
 181 #endif
 182
 183 #ifdef HAVE_SETCON
 184 #include <selinux/selinux.h>
 185 #endif
 186
 187 #ifdef TARGET_SOLARIS
 188 #ifdef HAVE_STRINGS_H
 189 #include <strings.h>
 190 #endif
 191 #else
 192 #ifdef HAVE_STRING_H
 193 #include <string.h>
 194 #endif
 195 #endif
 196
 197 #ifdef HAVE_ARPA_INET_H
 198 #include <arpa/inet.h>
 199 #endif
 200
 201 #ifdef HAVE_NET_IF_H
 202 #include <net/if.h>
 203 #endif
 204
 205 #ifdef TARGET_LINUX
 206
 207 #if defined(HAVE_NETINET_IF_ETHER_H)
 208 #include <netinet/if_ether.h>
 209 #endif
 210
 211 #ifdef HAVE_LINUX_IF_TUN_H
 212 #include <linux/if_tun.h>
 213 #endif
 214
 215 #ifdef HAVE_NETINET_IP_H
 216 #include <netinet/ip.h>
 217 #endif
 218
 219 #ifdef HAVE_LINUX_SOCKIOS_H
 220 #include <linux/sockios.h>
 221 #endif
 222
 223 #ifdef HAVE_LINUX_TYPES_H
 224 #include <linux/types.h>
 225 #endif
 226
 227 #ifdef HAVE_LINUX_ERRQUEUE_H
 228 #include <linux/errqueue.h>
 229 #endif
 230
 231 #ifdef HAVE_NETINET_TCP_H
 232 #include <netinet/tcp.h>
 233 #endif
 234
 235 #endif /* TARGET_LINUX */
 236
 237 #ifdef TARGET_SOLARIS
 238
 239 #ifdef HAVE_STROPTS_H
 240 #include <stropts.h>
 241 #undef S_ERROR
 242 #endif
 243
 244 #ifdef HAVE_NET_IF_TUN_H
 245 #include <net/if_tun.h>
 246 #endif
 247
 248 #ifdef HAVE_SYS_SOCKIO_H
 249 #include <sys/sockio.h>
 250 #endif
 251
 252 #ifdef HAVE_NETINET_IN_SYSTM_H
 253 #include <netinet/in_systm.h>
 254 #endif
 255
 256 #ifdef HAVE_NETINET_IP_H
 257 #include <netinet/ip.h>
 258 #endif
 259
 260 #ifdef HAVE_NETINET_TCP_H
 261 #include <netinet/tcp.h>
 262 #endif
 263
 264 #endif /* TARGET_SOLARIS */
 265
 266 #ifdef TARGET_OPENBSD
 267
 268 #ifdef HAVE_SYS_UIO_H
 269 #include <sys/uio.h>
 270 #endif
 271
 272 #ifdef HAVE_NETINET_IN_SYSTM_H
 273 #include <netinet/in_systm.h>
 274 #endif
 275
 276 #ifdef HAVE_NETINET_IP_H
 277 #include <netinet/ip.h>
 278 #endif
 279
 280 #ifdef HAVE_NET_IF_TUN_H
 281 #include <net/if_tun.h>
 282 #endif
 283
 284 #endif /* TARGET_OPENBSD */
 285
 286 #ifdef TARGET_FREEBSD
 287
 288 #ifdef HAVE_SYS_UIO_H
 289 #include <sys/uio.h>
 290 #endif
 291
 292 #ifdef HAVE_NETINET_IN_SYSTM_H
 293 #include <netinet/in_systm.h>
 294 #endif
 295
 296 #ifdef HAVE_NETINET_IP_H
 297 #include <netinet/ip.h>
 298 #endif
 299
 300 #ifdef HAVE_NET_IF_TUN_H
 301 #include <net/if_tun.h>
 302 #endif
 303
 304 #endif /* TARGET_FREEBSD */
 305
 306 #ifdef TARGET_NETBSD
 307
 308 #ifdef HAVE_NET_IF_TUN_H
 309 #include <net/if_tun.h>
 310 #endif
 311
 312 #ifdef HAVE_NETINET_TCP_H
 313 #include <netinet/tcp.h>
 314 #endif
 315
 316 #endif /* TARGET_NETBSD */
 317
 318 #ifdef TARGET_DRAGONFLY
 319
 320 #ifdef HAVE_SYS_UIO_H
 321 #include <sys/uio.h>
 322 #endif
 323
 324 #ifdef HAVE_NETINET_IN_SYSTM_H
 325 #include <netinet/in_systm.h>
 326 #endif
 327
 328 #ifdef HAVE_NETINET_IP_H
 329 #include <netinet/ip.h>
 330 #endif
 331
 332 #ifdef HAVE_NET_TUN_IF_TUN_H
 333 #include <net/tun/if_tun.h>
 334 #endif
 335
 336 #endif /* TARGET_DRAGONFLY */
 337
 338 #ifdef WIN32
 339 #include <iphlpapi.h>
 340 #include <wininet.h>
 341 #endif
 342
 343 #ifdef HAVE_SYS_MMAN_H
 344 #ifdef TARGET_DARWIN
 345 #define _P1003_1B_VISIBLE
 346 #endif /* TARGET_DARWIN */
 347 #include <sys/mman.h>
 348 #endif
 349
 350 /*
 351  * Pedantic mode is meant to accomplish lint-style program checking,
 352  * not to build a working executable.
 353  */
 354 #ifdef __STRICT_ANSI__
 355 # define PEDANTIC 1
 356 # undef HAVE_CPP_VARARG_MACRO_GCC
 357 # undef HAVE_CPP_VARARG_MACRO_ISO
 358 # undef EMPTY_ARRAY_SIZE
 359 # define EMPTY_ARRAY_SIZE 1
 360 # undef inline
 361 # define inline
 362 #else
 363 # define PEDANTIC 0
 364 #endif
 365
 366 /*
 367  * Do we have the capability to support the --passtos option?
 368  */
 369 #if defined(IPPROTO_IP) && defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
 370 #define PASSTOS_CAPABILITY 1
 371 #else
 372 #define PASSTOS_CAPABILITY 0
 373 #endif
 374
 375 /*
 376  * Do we have the capability to report extended socket errors?
 377  */
 378 #if defined(HAVE_LINUX_TYPES_H) && defined(HAVE_LINUX_ERRQUEUE_H) && defined(HAVE_SOCK_EXTENDED_ERR) && defined(HAVE_MSGHDR) && defined(HAVE_CMSGHDR) && defined(CMSG_FIRSTHDR) && defined(CMSG_NXTHDR) && defined(IP_RECVERR) && defined(MSG_ERRQUEUE) && defined(SOL_IP) && defined(HAVE_IOVEC)
 379 #define EXTENDED_SOCKET_ERROR_CAPABILITY 1
 380 #else
 381 #define EXTENDED_SOCKET_ERROR_CAPABILITY 0
 382 #endif
 383
 384 /*
 385  * Does this platform support linux-style IP_PKTINFO?
 386  */
 387 #if defined(ENABLE_MULTIHOME) && defined(HAVE_IN_PKTINFO) && defined(IP_PKTINFO) && defined(HAVE_MSGHDR) && defined(HAVE_CMSGHDR) && defined(HAVE_IOVEC) && defined(CMSG_FIRSTHDR) && defined(CMSG_NXTHDR) && defined(HAVE_RECVMSG) && defined(HAVE_SENDMSG)
 388 #define ENABLE_IP_PKTINFO 1
 389 #else
 390 #define ENABLE_IP_PKTINFO 0
 391 #endif
 392
 393 /*
 394  * Disable ESEC
 395  */
 396 #if 0
 397 #undef EXTENDED_SOCKET_ERROR_CAPABILITY
 398 #define EXTENDED_SOCKET_ERROR_CAPABILITY 0
 399 #endif
 400
 401 /*
 402  * Do we have a syslog capability?
 403  */
 404 #if defined(HAVE_OPENLOG) && defined(HAVE_SYSLOG)
 405 #define SYSLOG_CAPABILITY 1
 406 #else
 407 #define SYSLOG_CAPABILITY 0
 408 #endif
 409
 410 /*
 411  * Does this OS draw a distinction between binary and ascii files?
 412  */
 413 #ifndef O_BINARY
 414 #define O_BINARY 0
 415 #endif
 416
 417 /*
 418  * Directory separation char
 419  */
 420 #ifdef WIN32
 421 #define OS_SPECIFIC_DIRSEP '\\'
 422 #else
 423 #define OS_SPECIFIC_DIRSEP '/'
 424 #endif
 425
 426 /*
 427  * Define a boolean value based
 428  * on Win32 status.
 429  */
 430 #ifdef WIN32
 431 #define WIN32_0_1 1
 432 #else
 433 #define WIN32_0_1 0
 434 #endif
 435
 436 /*
 437  * Our socket descriptor type.
 438  */
 439 #ifdef WIN32
 440 #define SOCKET_UNDEFINED (INVALID_SOCKET)
 441 typedef SOCKET socket_descriptor_t;
 442 #else
 443 #define SOCKET_UNDEFINED (-1)
 444 typedef int socket_descriptor_t;
 445 #endif
 446
 447 static inline int
 448 socket_defined (const socket_descriptor_t sd)
 449 {
 450   return sd != SOCKET_UNDEFINED;
 451 }
 452
 453 /*
 454  * Should statistics counters be 64 bits?
 455  */
 456 #define USE_64_BIT_COUNTERS
 457
 458 /*
 459  * Should we enable the use of execve() for calling subprocesses,
 460  * instead of system()?
 461  */
 462 #if defined(HAVE_EXECVE) && defined(HAVE_FORK)
 463 #define ENABLE_EXECVE
 464 #endif
 465
 466 /*
 467  * Do we have point-to-multipoint capability?
 468  */
 469
 470 #if defined(ENABLE_CLIENT_SERVER) && defined(USE_CRYPTO) && defined(USE_SSL) && defined(HAVE_GETTIMEOFDAY)
 471 #define P2MP 1
 472 #else
 473 #define P2MP 0
 474 #endif
 475
 476 #if P2MP && !defined(ENABLE_CLIENT_ONLY)
 477 #define P2MP_SERVER 1
 478 #else
 479 #define P2MP_SERVER 0
 480 #endif
 481
 482 /*
 483  * HTTPS port sharing capability
 484  */
 485 #if defined(ENABLE_PORT_SHARE) && P2MP_SERVER && defined(SCM_RIGHTS) && defined(HAVE_MSGHDR) && defined(HAVE_CMSGHDR) && defined(HAVE_IOVEC) && defined(CMSG_FIRSTHDR) && defined(CMSG_NXTHDR) && defined(HAVE_RECVMSG) && defined(HAVE_SENDMSG)
 486 #define PORT_SHARE 1
 487 #else
 488 #define PORT_SHARE 0
 489 #endif
 490
 491 /*
 492  * Do we have a plug-in capability?
 493  */
 494 #if defined(USE_LIBDL) || defined(USE_LOAD_LIBRARY)
 495 #define ENABLE_PLUGIN
 496 #endif
 497
 498 /*
 499  * Enable deferred authentication?
 500  */
 501 #if defined(CONFIGURE_DEF_AUTH) && P2MP_SERVER && defined(ENABLE_PLUGIN)
 502 #define PLUGIN_DEF_AUTH
 503 #endif
 504 #if defined(CONFIGURE_DEF_AUTH) && P2MP_SERVER && defined(ENABLE_MANAGEMENT)
 505 #define MANAGEMENT_DEF_AUTH
 506 #endif
 507 #if defined(PLUGIN_DEF_AUTH) || defined(MANAGEMENT_DEF_AUTH)
 508 #define ENABLE_DEF_AUTH
 509 #endif
 510
 511 /*
 512  * Enable packet filter?
 513  */
 514 #if defined(CONFIGURE_PF) && P2MP_SERVER && defined(ENABLE_PLUGIN) && defined(HAVE_STAT)
 515 #define PLUGIN_PF
 516 #endif
 517 #if defined(CONFIGURE_PF) && P2MP_SERVER && defined(MANAGEMENT_DEF_AUTH)
 518 #define MANAGEMENT_PF
 519 #endif
 520 #if defined(PLUGIN_PF) || defined(MANAGEMENT_PF)
 521 #define ENABLE_PF
 522 #endif
 523
 524 /*
 525  * Do we support Unix domain sockets?
 526  */
 527 #if defined(PF_UNIX) && !defined(WIN32)
 528 #define UNIX_SOCK_SUPPORT 1
 529 #else
 530 #define UNIX_SOCK_SUPPORT 0
 531 #endif
 532
 533 /*
 534  * Don't compile the struct buffer_list code unless something needs it
 535  */
 536 #if defined(ENABLE_MANAGEMENT) || defined(ENABLE_PF)
 537 #define ENABLE_BUFFER_LIST
 538 #endif
 539
 540 /*
 541  * Do we have pthread capability?
 542  */
 543 #ifdef USE_PTHREAD
 544 #if defined(USE_CRYPTO) && defined(USE_SSL) && P2MP
 545 #include <pthread.h>
 546 #else
 547 #undef USE_PTHREAD
 548 #endif
 549 #endif
 550
 551 /*
 552  * Pthread support is currently experimental (and quite unfinished).
 553  */
 554 #if 1 /* JYFIXME -- if defined, disable pthread */
 555 #undef USE_PTHREAD
 556 #endif
 557
 558 /*
 559  * Should we include OCC (options consistency check) code?
 560  */
 561 #ifndef ENABLE_SMALL
 562 #define ENABLE_OCC
 563 #endif
 564
 565 /*
 566  * Should we include NTLM proxy functionality
 567  */
 568 #if defined(USE_CRYPTO) && defined(ENABLE_HTTP_PROXY)
 569 #define NTLM 1
 570 #else
 571 #define NTLM 0
 572 #endif
 573
 574 /*
 575  * Should we include code common to all proxy methods?
 576  */
 577 #if defined(ENABLE_HTTP_PROXY) || defined(ENABLE_SOCKS)
 578 #define GENERAL_PROXY_SUPPORT
 579 #endif
 580
 581 /*
 582  * Do we have PKCS11 capability?
 583  */
 584 #if defined(USE_PKCS11) && defined(USE_CRYPTO) && defined(USE_SSL)
 585 #define ENABLE_PKCS11
 586 #endif
 587
 588 /*
 589  * Is poll available on this platform?
 590  */
 591 #if defined(HAVE_POLL) && defined(HAVE_SYS_POLL_H)
 592 #define POLL 1
 593 #else
 594 #define POLL 0
 595 #endif
 596
 597 /*
 598  * Is epoll available on this platform?
 599  */
 600 #if defined(HAVE_EPOLL_CREATE) && defined(HAVE_SYS_EPOLL_H)
 601 #define EPOLL 1
 602 #else
 603 #define EPOLL 0
 604 #endif
 605
 606 /* Disable EPOLL */
 607 #if 0
 608 #undef EPOLL
 609 #define EPOLL 0
 610 #endif
 611
 612 /*
 613  * Should we allow ca/cert/key files to be
 614  * included inline, in the configuration file?
 615  */
 616 #define ENABLE_INLINE_FILES 1
 617
 618 /*
 619  * Reduce sensitivity to system clock instability
 620  * and backtracks.
 621  */
 622 #define TIME_BACKTRACK_PROTECTION 1
 623
 624 /*
 625  * Is non-blocking connect() supported?
 626  */
 627 #if defined(HAVE_GETSOCKOPT) && defined(SOL_SOCKET) && defined(SO_ERROR) && defined(EINPROGRESS) && defined(ETIMEDOUT)
 628 #define CONNECT_NONBLOCK
 629 #endif
 630
 631 /*
 632  * Do we have the capability to support the AUTO_USERID feature?
 633  */
 634 #if defined(ENABLE_AUTO_USERID)
 635 #define AUTO_USERID 1
 636 #else
 637 #define AUTO_USERID 0
 638 #endif
 639
 640 /*
 641  * Support "connection" directive
 642  */
 643 #if ENABLE_INLINE_FILES
 644 #define ENABLE_CONNECTION 1
 645 #endif
 646
 647 #endif