usr/src/lib/libwrap/fromhost.c

   1 /*
   2  * Copyright 2001 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5 #pragma ident   "%Z%%M% %I%     %E% SMI"
   6
   7  /*
   8   * On socket-only systems, fromhost() is nothing but an alias for the
   9   * socket-specific sock_host() function.
  10   *
  11   * On systems with sockets and TLI, fromhost() determines the type of API
  12   * (sockets, TLI), then invokes the appropriate API-specific routines.
  13   *
  14   * Diagnostics are reported through syslog(3).
  15   *
  16   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
  17   */
  18
  19 static char sccsid[] = "@(#) fromhost.c 1.17 94/12/28 17:42:23";
  20
  21 #if defined(TLI) || defined(PTX) || defined(TLI_SEQUENT)
  22
  23 /* System libraries. */
  24
  25 #include <sys/types.h>
  26 #include <sys/tiuser.h>
  27 #include <stropts.h>
  28
  29 /* Local stuff. */
  30
  31 #include "tcpd.h"
  32
  33 /* fromhost - find out what network API we should use */
  34
  35 void    fromhost(request)
  36 struct request_info *request;
  37 {
  38
  39     /*
  40      * On systems with streams support the IP network protocol family may be
  41      * accessible via more than one programming interface: Berkeley sockets
  42      * and the Transport Level Interface (TLI).
  43      *
  44      * Thus, we must first find out what programming interface to use: sockets
  45      * or TLI. On some systems, sockets are not part of the streams system,
  46      * so if request->fd is not a stream we simply assume sockets.
  47      */
  48
  49     if (ioctl(request->fd, I_FIND, "timod") > 0) {
  50         tli_host(request);
  51     } else {
  52         sock_host(request);
  53     }
  54 }
  55
  56 #endif /* TLI || PTX || TLI_SEQUENT */