78 lines
1.4 KiB
C++
78 lines
1.4 KiB
C++
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/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name :
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ipsupp.cxx
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Abstract:
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This module defines functions that are generic for Internet servers
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Author:
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Murali R. Krishnan ( MuraliK ) 15-Nov-1995
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--*/
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#include "precomp.hxx"
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#include <inetsvcs.h>
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#include <winsock2.h>
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#define LOCAL127 0x0100007F // 127.0.0.1
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BOOL
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IsIPAddressLocal(
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IN DWORD LocalIP,
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IN DWORD RemoteIP
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)
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{
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INT err;
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CHAR nameBuf[MAX_PATH+1];
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PHOSTENT hostent;
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PIN_ADDR p;
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CHAR **list;
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//
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// if local and remote are the same, then this is local
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//
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if ( (LocalIP == RemoteIP) ||
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(RemoteIP == LOCAL127) ||
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(LocalIP == LOCAL127) ) {
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return(TRUE);
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}
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err = gethostname( nameBuf, sizeof(nameBuf));
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if ( err != 0 ) {
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IIS_PRINTF((buff,"IsIPAddressLocal: Err %d in gethostname\n",
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WSAGetLastError()));
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return(FALSE);
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}
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hostent = gethostbyname( nameBuf );
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if ( hostent == NULL ) {
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IIS_PRINTF((buff,"IsIPAddressLocal: Err %d in gethostbyname\n",
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WSAGetLastError()));
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return(FALSE);
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}
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list = hostent->h_addr_list;
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while ( (p = (PIN_ADDR)*list++) != NULL ) {
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if ( p->s_addr == RemoteIP ) {
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return(TRUE);
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}
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}
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IIS_PRINTF((buff,"Not Local[%x %x]\n", LocalIP, RemoteIP));
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return(FALSE);
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} // IsIPAddressLocal
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