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