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608 lines
24 KiB
608 lines
24 KiB
/***************************************************************************/
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/* */
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/* Project: OpenSLP - OpenSource implementation of Service Location */
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/* Protocol Version 2 */
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/* */
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/* File: slplib_findsrvs.c */
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/* */
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/* Abstract: Implementation for SLPFindSrvs() call. */
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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.h"
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#include "libslp.h"
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/*-------------------------------------------------------------------------*/
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SLPBoolean ColateSLPSrvURLCallback(SLPHandle hSLP,
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const char* pcSrvURL,
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unsigned short sLifetime,
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SLPError errCode,
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void *pvCookie)
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/*-------------------------------------------------------------------------*/
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{
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SLPSrvUrlColatedItem* collateditem;
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PSLPHandleInfo handle;
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handle = (PSLPHandleInfo) hSLP;
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handle->callbackcount ++;
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#ifdef ENABLE_ASYNC_API
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/* Do not colate for async calls */
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if(handle->isAsync)
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{
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return handle->params.findsrvs.callback(hSLP,
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pcSrvURL,
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sLifetime,
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errCode,
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pvCookie);
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}
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#endif
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if(errCode == SLP_LAST_CALL ||
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handle->callbackcount > SLPPropertyAsInteger(SLPGetProperty("net.slp.maxResults")))
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{
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/* We are done so call the caller's callback for each */
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/* service URL colated item and clean up the colation list */
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handle->params.findsrvs.callback((SLPHandle)handle,
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NULL,
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0,
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SLP_LAST_CALL,
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handle->params.findsrvs.cookie);
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goto CLEANUP;
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}
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else if(errCode != SLP_OK)
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{
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return SLP_TRUE;
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}
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/* Add the service URL to the colation list */
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collateditem = (SLPSrvUrlColatedItem*) handle->collatedsrvurls.head;
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while(collateditem)
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{
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if(strcmp(collateditem->srvurl,pcSrvURL) == 0)
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{
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break;
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}
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collateditem = (SLPSrvUrlColatedItem*)collateditem->listitem.next;
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}
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/* create a new item if none was found */
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if(collateditem == NULL)
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{
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collateditem = (SLPSrvUrlColatedItem*) xmalloc(sizeof(SLPSrvUrlColatedItem) + \
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strlen(pcSrvURL) + 1);
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if(collateditem)
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{
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memset(collateditem,0,sizeof(SLPSrvUrlColatedItem));
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collateditem->srvurl = (char*)(collateditem + 1);
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strcpy(collateditem->srvurl,pcSrvURL);
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collateditem->lifetime = sLifetime;
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/* Add the new item to the collated list */
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SLPListLinkTail(&(handle->collatedsrvurls),
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(SLPListItem*)collateditem);
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/* Call the caller's callback */
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if(handle->params.findsrvs.callback((SLPHandle)handle,
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pcSrvURL,
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sLifetime,
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SLP_OK,
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handle->params.findsrvs.cookie) == SLP_FALSE)
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{
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goto CLEANUP;
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}
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}
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}
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return SLP_TRUE;
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CLEANUP:
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/* free the collation list */
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while(handle->collatedsrvurls.count)
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{
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collateditem = (SLPSrvUrlColatedItem*)SLPListUnlink(&(handle->collatedsrvurls),
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handle->collatedsrvurls.head);
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xfree(collateditem);
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}
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handle->callbackcount = 0;
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return SLP_FALSE;
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}
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/*-------------------------------------------------------------------------*/
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SLPBoolean ProcessSrvRplyCallback(SLPError errorcode,
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struct sockaddr_in* peerinfo,
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SLPBuffer replybuf,
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void* cookie)
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/*-------------------------------------------------------------------------*/
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{
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int i;
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SLPUrlEntry* urlentry;
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SLPMessage replymsg;
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PSLPHandleInfo handle = (PSLPHandleInfo) cookie;
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SLPBoolean result = SLP_TRUE;
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#ifdef ENABLE_SLPv2_SECURITY
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int securityenabled;
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securityenabled = SLPPropertyAsBoolean(SLPGetProperty("net.slp.securityEnabled"));
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#endif
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/*-------------------------------------------*/
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/* Check the errorcode and bail if it is set */
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/*-------------------------------------------*/
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if(errorcode != SLP_OK)
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{
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return ColateSLPSrvURLCallback((SLPHandle)handle,
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0,
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0,
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errorcode,
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handle->params.findsrvs.cookie);
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}
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/*--------------------*/
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/* Parse the replybuf */
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/*--------------------*/
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replymsg = SLPMessageAlloc();
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if(replymsg)
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{
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if(SLPMessageParseBuffer(peerinfo,replybuf,replymsg) == 0)
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{
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if(replymsg->header.functionid == SLP_FUNCT_SRVRPLY &&
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replymsg->body.srvrply.errorcode == 0)
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{
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urlentry = replymsg->body.srvrply.urlarray;
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for(i=0;i<replymsg->body.srvrply.urlcount;i++)
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{
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#ifdef ENABLE_SLPv2_SECURITY
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/*-------------------------------*/
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/* Validate the authblocks */
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/*-------------------------------*/
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if(securityenabled &&
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SLPAuthVerifyUrl(handle->hspi,
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1,
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&(urlentry[i])))
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{
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/* authentication failed skip this URLEntry */
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continue;
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}
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#endif
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/*--------------------------------*/
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/* Send the URL to the API caller */
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/*--------------------------------*/
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/* TRICKY: null terminate the url by setting the authcount to 0 */
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((char*)(urlentry[i].url))[urlentry[i].urllen] = 0;
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result = ColateSLPSrvURLCallback((SLPHandle)handle,
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urlentry[i].url,
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(unsigned short)urlentry[i].lifetime,
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SLP_OK,
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handle->params.findsrvs.cookie);
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if(result == SLP_FALSE)
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{
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break;
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}
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}
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}
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else if(replymsg->header.functionid == SLP_FUNCT_DAADVERT &&
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replymsg->body.daadvert.errorcode == 0)
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{
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#ifdef ENABLE_SLPv2_SECURITY
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if(securityenabled &&
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SLPAuthVerifyDAAdvert(handle->hspi,
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1,
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&(replymsg->body.daadvert)))
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{
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/* Verification failed. Ignore message */
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SLPMessageFree(replymsg);
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return SLP_TRUE;
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}
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#endif
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((char*)(replymsg->body.daadvert.url))[replymsg->body.daadvert.urllen] = 0;
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result = ColateSLPSrvURLCallback((SLPHandle)handle,
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replymsg->body.daadvert.url,
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SLP_LIFETIME_MAXIMUM,
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SLP_OK,
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handle->params.findsrvs.cookie);
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}
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else if(replymsg->header.functionid == SLP_FUNCT_SAADVERT)
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{
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#ifdef ENABLE_SLPv2_SECURITY
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if(securityenabled &&
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SLPAuthVerifySAAdvert(handle->hspi,
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1,
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&(replymsg->body.saadvert)))
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{
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/* Verification failed. Ignore message */
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SLPMessageFree(replymsg);
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return SLP_TRUE;
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}
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#endif
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((char*)(replymsg->body.saadvert.url))[replymsg->body.saadvert.urllen] = 0;
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result = ColateSLPSrvURLCallback((SLPHandle)handle,
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replymsg->body.saadvert.url,
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SLP_LIFETIME_MAXIMUM,
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SLP_OK,
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handle->params.findsrvs.cookie);
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}
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}
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SLPMessageFree(replymsg);
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}
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return result;
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}
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/*-------------------------------------------------------------------------*/
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SLPError ProcessSrvRqst(PSLPHandleInfo handle)
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/*-------------------------------------------------------------------------*/
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{
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struct sockaddr_in peeraddr;
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int sock = -1;
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int bufsize = 0;
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char* buf = 0;
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char* curpos = 0;
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SLPError result = 0;
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#ifdef ENABLE_SLPv2_SECURITY
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int spistrlen = 0;
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char* spistr = 0;
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#endif
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/*------------------------------------------*/
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/* Is this a special attempt to locate DAs? */
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/*------------------------------------------*/
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if(strncasecmp(handle->params.findsrvs.srvtype,
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SLP_DA_SERVICE_TYPE,
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handle->params.findsrvs.srvtypelen) == 0)
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{
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KnownDAProcessSrvRqst(handle);
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goto FINISHED;
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}
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#ifdef ENABLE_SLPv2_SECURITY
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if(SLPPropertyAsBoolean(SLPGetProperty("net.slp.securityEnabled")))
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{
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SLPSpiGetDefaultSPI(handle->hspi,
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SLPSPI_KEY_TYPE_PUBLIC,
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&spistrlen,
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&spistr);
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}
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#endif
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/*-------------------------------------------------------------------*/
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/* determine the size of the fixed portion of the SRVRQST */
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/*-------------------------------------------------------------------*/
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bufsize = handle->params.findsrvs.srvtypelen + 2; /* 2 bytes for len field */
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bufsize += handle->params.findsrvs.scopelistlen + 2; /* 2 bytes for len field */
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bufsize += handle->params.findsrvs.predicatelen + 2; /* 2 bytes for len field */
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bufsize += 2; /* 2 bytes for spistr len*/
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#ifdef ENABLE_SLPv2_SECURITY
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bufsize += spistrlen;
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#endif
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buf = curpos = (char*)xmalloc(bufsize);
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if(buf == 0)
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{
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result = SLP_MEMORY_ALLOC_FAILED;
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goto FINISHED;
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}
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/*------------------------------------------------------------*/
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/* Build a buffer containing the fixed portion of the SRVRQST */
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/*------------------------------------------------------------*/
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/* service type */
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ToUINT16(curpos,handle->params.findsrvs.srvtypelen);
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curpos = curpos + 2;
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memcpy(curpos,
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handle->params.findsrvs.srvtype,
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handle->params.findsrvs.srvtypelen);
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curpos = curpos + handle->params.findsrvs.srvtypelen;
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/* scope list */
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ToUINT16(curpos,handle->params.findsrvs.scopelistlen);
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curpos = curpos + 2;
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memcpy(curpos,
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handle->params.findsrvs.scopelist,
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handle->params.findsrvs.scopelistlen);
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curpos = curpos + handle->params.findsrvs.scopelistlen;
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/* predicate */
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ToUINT16(curpos,handle->params.findsrvs.predicatelen);
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curpos = curpos + 2;
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memcpy(curpos,
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handle->params.findsrvs.predicate,
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handle->params.findsrvs.predicatelen);
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curpos = curpos + handle->params.findsrvs.predicatelen;
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#ifdef ENABLE_SLPv2_SECURITY
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ToUINT16(curpos,spistrlen);
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curpos = curpos + 2;
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memcpy(curpos,spistr,spistrlen);
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curpos = curpos + spistrlen;
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#else
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ToUINT16(curpos,0);
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#endif
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/*--------------------------*/
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/* Call the RqstRply engine */
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/*--------------------------*/
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do
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{
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#ifndef UNICAST_NOT_SUPPORTED
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if ( handle->dounicast == 1 )
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{
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void *cookie = (PSLPHandleInfo) handle;
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result = NetworkUcastRqstRply(handle,
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buf,
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SLP_FUNCT_SRVRQST,
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bufsize,
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ProcessSrvRplyCallback,
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cookie);
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break;
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}
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else
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#endif
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if(strncasecmp(handle->params.findsrvs.srvtype,
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SLP_SA_SERVICE_TYPE,
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handle->params.findsrvs.srvtypelen))
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{
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sock = NetworkConnectToDA(handle,
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handle->params.findsrvs.scopelist,
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handle->params.findsrvs.scopelistlen,
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&peeraddr);
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}
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if(sock == -1)
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{
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/* use multicast as a last resort */
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#ifndef MI_NOT_SUPPORTED
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result = NetworkMcastRqstRply(handle,
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buf,
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SLP_FUNCT_SRVRQST,
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bufsize,
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ProcessSrvRplyCallback,
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NULL);
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#else
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result = NetworkMcastRqstRply(handle->langtag,
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buf,
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SLP_FUNCT_SRVRQST,
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bufsize,
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ProcessSrvRplyCallback,
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handle);
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#endif /* MI_NOT_SUPPORTED */
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break;
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}
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result = NetworkRqstRply(sock,
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&peeraddr,
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handle->langtag,
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0,
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buf,
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SLP_FUNCT_SRVRQST,
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bufsize,
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ProcessSrvRplyCallback,
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handle);
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if(result)
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{
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NetworkDisconnectDA(handle);
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}
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}while(result == SLP_NETWORK_ERROR);
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FINISHED:
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if(buf) xfree(buf);
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#ifdef ENABLE_SLPv2_SECURITY
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if(spistr) xfree(spistr);
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#endif
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return result;
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}
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#ifdef ENABLE_ASYNC_API
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/*-------------------------------------------------------------------------*/
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SLPError AsyncProcessSrvRqst(PSLPHandleInfo handle)
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/*-------------------------------------------------------------------------*/
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{
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SLPError result = ProcessSrvRqst(handle);
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xfree((void*)handle->params.findsrvs.srvtype);
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xfree((void*)handle->params.findsrvs.scopelist);
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xfree((void*)handle->params.findsrvs.predicate);
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handle->inUse = SLP_FALSE;
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return result;
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}
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#endif
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/*=========================================================================*/
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SLPError SLPAPI SLPFindSrvs(SLPHandle hSLP,
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const char *pcServiceType,
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const char *pcScopeList,
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const char *pcSearchFilter,
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SLPSrvURLCallback callback,
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void *pvCookie)
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/* */
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/* Issue the query for services on the language specific SLPHandle and */
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/* return the results through the callback. The parameters determine */
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/* the results */
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/* */
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/* hSLP The language specific SLPHandle on which to search for */
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/* services. */
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/* */
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/* pcServiceType The Service Type String, including authority string if */
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/* any, for the request, such as can be discovered using */
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/* SLPSrvTypes(). This could be, for example */
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/* "service:printer:lpr" or "service:nfs". May not be */
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/* the empty string or NULL. */
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/* */
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/* */
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/* pcScopeList A pointer to a char containing comma separated list of */
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/* scope names. Pass in the NULL or the empty string "" */
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/* to find services in all the scopes the local host is */
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/* configured query. */
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/* */
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/* pcSearchFilter A query formulated of attribute pattern matching */
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/* expressions in the form of a LDAPv3 Search Filter. */
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/* If this filter is NULL or empty, i.e. "", all */
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/* services of the requested type in the specified scopes */
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/* are returned. */
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/* */
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/* callback A callback function through which the results of the */
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/* operation are reported. May not be NULL */
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/* */
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/* pvCookie Memory passed to the callback code from the client. */
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/* May be NULL. */
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/* */
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/* Returns: If an error occurs in starting the operation, one of */
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/* the SLPError codes is returned. */
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/* */
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/*=========================================================================*/
|
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{
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PSLPHandleInfo handle;
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SLPError result;
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|
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/*------------------------------*/
|
|
/* check for invalid parameters */
|
|
/*------------------------------*/
|
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if(hSLP == 0 ||
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*(unsigned int*)hSLP != SLP_HANDLE_SIG ||
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pcServiceType == 0 ||
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*pcServiceType == 0 || /* srvtype can't be empty string */
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callback == 0)
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{
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return SLP_PARAMETER_BAD;
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}
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|
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|
|
/*-----------------------------------------*/
|
|
/* cast the SLPHandle into a SLPHandleInfo */
|
|
/*-----------------------------------------*/
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handle = (PSLPHandleInfo)hSLP;
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|
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/*-----------------------------------------*/
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/* Check to see if the handle is in use */
|
|
/*-----------------------------------------*/
|
|
if(handle->inUse == SLP_TRUE)
|
|
{
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return SLP_HANDLE_IN_USE;
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}
|
|
handle->inUse = SLP_TRUE;
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|
|
|
|
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/*-------------------------------------------*/
|
|
/* Set the handle up to reference parameters */
|
|
/*-------------------------------------------*/
|
|
handle->params.findsrvs.srvtypelen = strlen(pcServiceType);
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|
handle->params.findsrvs.srvtype = pcServiceType;
|
|
if(pcScopeList && *pcScopeList)
|
|
{
|
|
handle->params.findsrvs.scopelistlen = strlen(pcScopeList);
|
|
handle->params.findsrvs.scopelist = pcScopeList;
|
|
}
|
|
else
|
|
{
|
|
handle->params.findsrvs.scopelist = SLPGetProperty("net.slp.useScopes");
|
|
handle->params.findsrvs.scopelistlen = strlen(handle->params.findsrvs.scopelist);
|
|
}
|
|
|
|
if(pcSearchFilter)
|
|
{
|
|
handle->params.findsrvs.predicatelen = strlen(pcSearchFilter);
|
|
handle->params.findsrvs.predicate = pcSearchFilter;
|
|
}
|
|
else
|
|
{
|
|
handle->params.findsrvs.predicatelen = 0;
|
|
handle->params.findsrvs.predicate = (char*)&handle->params.findsrvs.predicatelen;
|
|
}
|
|
handle->params.findsrvs.callback = callback;
|
|
handle->params.findsrvs.cookie = pvCookie;
|
|
|
|
|
|
/*----------------------------------------------*/
|
|
/* Check to see if we should be async or sync */
|
|
/*----------------------------------------------*/
|
|
#ifdef ENABLE_ASYNC_API
|
|
if(handle->isAsync)
|
|
{
|
|
/* COPY all the referenced parameters */
|
|
handle->params.findsrvs.srvtype = xstrdup(handle->params.findsrvs.srvtype);
|
|
handle->params.findsrvs.scopelist = xstrdup(handle->params.findsrvs.scopelist);
|
|
handle->params.findsrvs.predicate = xstrdup(handle->params.findsrvs.predicate);
|
|
|
|
/* make sure strdups did not fail */
|
|
if(handle->params.findsrvs.srvtype &&
|
|
handle->params.findsrvs.scopelist &&
|
|
handle->params.findsrvs.predicate)
|
|
{
|
|
result = ThreadCreate((ThreadStartProc)AsyncProcessSrvRqst,handle);
|
|
}
|
|
else
|
|
{
|
|
result = SLP_MEMORY_ALLOC_FAILED;
|
|
}
|
|
|
|
if(result)
|
|
{
|
|
if(handle->params.findsrvs.srvtype) xfree((void*)handle->params.findsrvs.srvtype);
|
|
if(handle->params.findsrvs.scopelist) xfree((void*)handle->params.findsrvs.scopelist);
|
|
if(handle->params.findsrvs.predicate) xfree((void*)handle->params.findsrvs.predicate);
|
|
handle->inUse = SLP_FALSE;
|
|
}
|
|
}
|
|
else
|
|
#endif /* ifdef ENABLE_ASYNC_API */
|
|
{
|
|
/* Leave all parameters REFERENCED */
|
|
|
|
result = ProcessSrvRqst(handle);
|
|
|
|
handle->inUse = SLP_FALSE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|