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 14 static 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 31 void fromhost(request) 32 struct 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