src/OS/os.h-FreeBSD

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