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161 lines
6.7 KiB
161 lines
6.7 KiB
4 years ago
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/***************************************************************************/
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/* */
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/* Project: OpenSLP - OpenSource implementation of Service Location */
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/* Protocol */
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/* */
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/* File: slp_net.h */
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/* */
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/* Abstract: Network utility functions */
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/* */
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/*-------------------------------------------------------------------------*/
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/* */
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/* Please submit patches to http://www.openslp.org */
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/* */
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/*-------------------------------------------------------------------------*/
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/* */
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/* Copyright (C) 2000 Caldera Systems, Inc */
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/* All rights reserved. */
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/* */
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/* Redistribution and use in source and binary forms, with or without */
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/* modification, are permitted provided that the following conditions are */
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/* met: */
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/* */
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/* Redistributions of source code must retain the above copyright */
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/* notice, this list of conditions and the following disclaimer. */
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/* */
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/* Redistributions in binary form must reproduce the above copyright */
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/* notice, this list of conditions and the following disclaimer in */
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/* the documentation and/or other materials provided with the */
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/* distribution. */
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/* */
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/* Neither the name of Caldera Systems nor the names of its */
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/* contributors may be used to endorse or promote products derived */
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/* from this software without specific prior written permission. */
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/* */
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/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
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/* `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
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/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */
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/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE CALDERA */
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/* SYSTEMS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
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/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
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/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */
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/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON */
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/* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
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/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */
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/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* */
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/***************************************************************************/
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#include "slp_net.h"
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#include "slp_xmalloc.h"
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#ifdef _WIN32
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/* definition for inet_aton() since Microsoft does not have this yet */
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#define inet_aton(opt,bind) ((bind)->s_addr = inet_addr(opt))
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#endif
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/*-------------------------------------------------------------------------*/
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int SLPNetGetThisHostname(char** hostfdn, int numeric_only)
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/*
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* Description:
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* Returns a string represting this host (the FDN) or null. Caller must
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* free returned string
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*
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* Parameters:
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* hostfdn (OUT) pointer to char pointer that is set to buffer
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* contining this machine's FDN. Caller must free
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* returned string with call to xfree()
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* numeric_only (IN) force return of numeric address.
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*
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* Returns: zero on success, non-zero on error;
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*-------------------------------------------------------------------------*/
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{
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/* TODO find a better constant for MAX_HOSTNAME */
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#define MAX_HOST_NAME 256
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char host[MAX_HOST_NAME];
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struct hostent* he;
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struct in_addr ifaddr;
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if ((hostfdn != NULL) && (gethostname(host, MAX_HOST_NAME) == 0))
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{
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*hostfdn = NULL;
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/* Windows compatibility */
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if (inet_aton(host, &ifaddr))
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{
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if (numeric_only)
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{
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*hostfdn = xstrdup(inet_ntoa(ifaddr));
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return 0;
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}
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he = gethostbyaddr((char *)&ifaddr, sizeof(ifaddr), AF_INET);
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}
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else
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{
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he = gethostbyname(host);
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}
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if(he)
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{
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/* if the hostname has a '.' then it is probably a qualified
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* domain name. If it is not then we better use the IP address
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*/
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if(!numeric_only && strchr(he->h_name,'.'))
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{
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*hostfdn = xstrdup(he->h_name);
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}
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else
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{
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ifaddr.s_addr = *((unsigned long*)he->h_addr);
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*hostfdn = xstrdup(inet_ntoa(ifaddr));
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}
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return 0;
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}
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}
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return -1;
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}
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/*-------------------------------------------------------------------------*/
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int SLPNetResolveHostToAddr(const char* host,
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struct in_addr* addr)
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/*
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* Description:
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* Returns a string represting this host (the FDN) or null. Caller must
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* free returned string
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*
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* Parameters:
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* host (IN) pointer to hostname to resolve
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* addr (OUT) pointer to in_addr that will be filled with address
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*
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* Returns: zero on success, non-zero on error;
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*-------------------------------------------------------------------------*/
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{
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struct hostent* he;
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/* quick check for dotted quad IPv4 address */
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if(inet_aton(host,addr))
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{
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return 0;
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}
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/* Use resolver */
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he = gethostbyname(host);
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if(he != 0)
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{
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if(he->h_addrtype == AF_INET)
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{
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memcpy(addr,he->h_addr_list[0],sizeof(struct in_addr));
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return 0;
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}
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else
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{
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/* TODO: support other address types */
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}
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}
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return -1;
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}
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