src/OS/os.h-FreeBSD

   1 /* Exim: OS-specific C header file for FreeBSD */
   2 /* Copyright (c) University of Cambridge 1995 - 2018 */
   3 /* See the file NOTICE for conditions of use and distribution. */
   4
   5
   6 #include <sys/types.h>
   7 #include <sys/param.h>
   8
   9 #define HAVE_BSD_GETLOADAVG
  10 #define HAVE_SETCLASSRESOURCES
  11 #define HAVE_MMAP
  12 #define HAVE_SYS_MOUNT_H
  13 #define SIOCGIFCONF_GIVES_ADDR
  14 #define HAVE_SRANDOMDEV
  15 #define HAVE_ARC4RANDOM
  16
  17 /* Applications should not call arc4random_stir() explicitly after
  18  * FreeBSD r227520 (approximately 1000002).
  19  * Set NOT_HAVE_ARC4RANDOM_STIR if the version released is past
  20  * that point. */
  21 #if __FreeBSD_version >= 1000002
  22 # define NOT_HAVE_ARC4RANDOM_STIR
  23 #endif
  24
  25 typedef struct flock flock_t;
  26
  27 /* iconv arg2 type: libiconv in Ports uses "const char* * inbuf" and was
  28  * traditionally the only approach available.  The iconv functionality
  29  * in libc is "char ** restrict src".
  30  *
  31  * <https://www.freebsd.org/doc/en/books/porters-handbook/using-iconv.html>
  32  * says that libc has iconv since 2013, in 10-CURRENT.  FreeBSD man-pages
  33  * shows it included in 10.0-RELEASE.  Writing this in 2017, 10.3 is the
  34  * oldest supported release, so we should assume non-libiconv by default.
  35  * (Actually, people still using old releases past EOL; we shouldn't support
  36  * them but I don't want to deal with howls of complaints because we dare
  37  * to not support the unsupported, so guard this on FreeBSD 10+)
  38  *
  39  * Thus we no longer override iconv.
  40  *
  41  * However, if libiconv is installed, and anything adds /usr/local/include
  42  * to include-path (likely) then we'll get that.  So define a variable
  43  * which makes the libiconv try to not interfere with OS iconv.
  44  */
  45 #if __FreeBSD__ >= 10
  46 # define LIBICONV_PLUG
  47 #endif
  48 /* for more specific version constraints, look at __FreeBSD_version
  49  * from <sys/param.h> */
  50
  51 /* When using DKIM, setting OS_SENDFILE can increase
  52 performance on outgoing mail a bit. */
  53
  54 #define OS_SENDFILE
  55 extern ssize_t os_sendfile(int, int, off_t *, size_t);
  56
  57
  58 /*******************/
  59
  60 /* TCP_FASTOPEN support.  There does not seems to be a
  61 MSG_FASTOPEN defined yet... */
  62 #define EXIM_TFO_PROBE
  63
  64 #include <netinet/tcp.h>        /* for TCP_FASTOPEN */
  65 #include <sys/socket.h>         /* for MSG_FASTOPEN */
  66 #if defined(TCP_FASTOPEN) && !defined(MSG_FASTOPEN)
  67 # define MSG_FASTOPEN 0x20000000
  68 #endif
  69
  70 /* for TCP state-variable values, for TFO logging */
  71 #include <netinet/tcp_fsm.h>
  72 #define TCP_SYN_RECV TCPS_SYN_RECEIVED
  73
  74 /*******************/
  75
  76 /* End */