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extra-dependencies/debian/openslp-dfsg/openslp-dfsg-1.2.1/slpd/slpd_knownda.c

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Added debian extra dependency packages. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
4 years ago
/***************************************************************************/
/* */
/* Project: OpenSLP - OpenSource implementation of Service Location */
/* Protocol Version 2 */
/* */
/* File: slpd_knownda.c */
/* */
/* Abstract: Keeps track of known DAs */
/* */
/*-------------------------------------------------------------------------*/
/* */
/* Please submit patches to http://www.openslp.org */
/* */
/*-------------------------------------------------------------------------*/
/* */
/* Copyright (C) 2000 Caldera Systems, Inc */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions are */
/* met: */
/* */
/* Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in */
/* the documentation and/or other materials provided with the */
/* distribution. */
/* */
/* Neither the name of Caldera Systems nor the names of its */
/* contributors may be used to endorse or promote products derived */
/* from this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */
/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE CALDERA */
/* SYSTEMS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */
/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON */
/* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */
/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* */
/***************************************************************************/
#include "slpd.h"
/*=========================================================================*/
/* slpd includes */
/*=========================================================================*/
#include "slpd_knownda.h"
#include "slpd_property.h"
#include "slpd_database.h"
#include "slpd_socket.h"
#include "slpd_outgoing.h"
#include "slpd_log.h"
#ifdef ENABLE_SLPv2_SECURITY
#include "slpd_spi.h"
#endif
/*=========================================================================*/
/* common code includes */
/*=========================================================================*/
#include "slp_xmalloc.h"
#include "slp_v1message.h"
#include "slp_utf8.h"
#include "slp_compare.h"
#include "slp_xid.h"
#include "slp_dhcp.h"
#include "slp_parse.h"
#include "slp_net.h"
#ifdef ENABLE_SLPv2_SECURITY
#include "slp_auth.h"
#include "slp_spi.h"
#endif
#include <limits.h>
/*=========================================================================*/
SLPDatabase G_SlpdKnownDAs;
/* The database of DAAdverts from DAs known to slpd. */
/*=========================================================================*/
/*=========================================================================*/
int G_KnownDATimeSinceLastRefresh = 0;
/*=========================================================================*/
/*-------------------------------------------------------------------------*/
int MakeActiveDiscoveryRqst(int ismcast, SLPBuffer* buffer)
/* Pack a buffer with service:directory-agent SrvRqst *
* *
* Caller must free buffer *
*-------------------------------------------------------------------------*/
{
size_t size;
void* eh;
SLPMessage msg;
char* prlist = 0;
size_t prlistlen = 0;
int errorcode = 0;
SLPBuffer tmp = 0;
SLPBuffer result = *buffer;
/*-------------------------------------------------*/
/* Generate a DA service request buffer to be sent */
/*-------------------------------------------------*/
/* determine the size of the fixed portion of the SRVRQST */
size = 47; /* 14 bytes for the header */
/* 2 bytes for the prlistlen */
/* 2 bytes for the srvtype length */
/* 23 bytes for "service:directory-agent" srvtype */
/* 2 bytes for scopelistlen */
/* 2 bytes for predicatelen */
/* 2 bytes for sprstrlen */
/* figure out what our Prlist will be by going through our list of */
/* known DAs */
prlistlen = 0;
prlist = xmalloc(SLP_MAX_DATAGRAM_SIZE);
if ( prlist == 0 )
{
/* out of memory */
errorcode = SLP_ERROR_INTERNAL_ERROR;
goto FINISHED;
}
*prlist = 0;
/* Don't send active discoveries to DAs we already know about */
eh = SLPDKnownDAEnumStart();
if ( eh )
{
while ( 1 )
{
if ( SLPDKnownDAEnum(eh, &msg, &tmp) == 0 )
{
break;
}
strcat(prlist,inet_ntoa(msg->peer.sin_addr));
strcat(prlist,",");
prlistlen = strlen(prlist);
}
SLPDKnownDAEnumEnd(eh);
}
/* Allocate the send buffer */
size += G_SlpdProperty.localeLen + prlistlen;
result = SLPBufferRealloc(result, size);
if ( result == 0 )
{
/* out of memory */
errorcode = SLP_ERROR_INTERNAL_ERROR;
goto FINISHED;
}
/*------------------------------------------------------------*/
/* Build a buffer containing the fixed portion of the SRVRQST */
/*------------------------------------------------------------*/
/*version*/
*(result->start) = 2;
/*function id*/
*(result->start + 1) = SLP_FUNCT_SRVRQST;
/*length*/
ToUINT24(result->start + 2, size);
/*flags*/
ToUINT16(result->start + 5, (ismcast ? SLP_FLAG_MCAST : 0));
/*ext offset*/
ToUINT24(result->start + 7,0);
/*xid*/
ToUINT16(result->start + 10, SLPXidGenerate()); /* TODO: generate a real XID */
/*lang tag len*/
ToUINT16(result->start + 12, G_SlpdProperty.localeLen);
/*lang tag*/
memcpy(result->start + 14,
G_SlpdProperty.locale,
G_SlpdProperty.localeLen);
result->curpos = result->start + G_SlpdProperty.localeLen + 14;
/* Prlist */
ToUINT16(result->curpos,prlistlen);
result->curpos = result->curpos + 2;
memcpy(result->curpos,prlist,prlistlen);
result->curpos = result->curpos + prlistlen;
/* service type */
ToUINT16(result->curpos,23);
result->curpos = result->curpos + 2;
/* 23 is the length of SLP_DA_SERVICE_TYPE */
memcpy(result->curpos,SLP_DA_SERVICE_TYPE,23);
result->curpos = result->curpos + 23;
/* scope list zero length */
ToUINT16(result->curpos,0);
result->curpos = result->curpos + 2;
/* predicate zero length */
ToUINT16(result->curpos,0);
result->curpos = result->curpos + 2;
/* spi list zero length */
ToUINT16(result->curpos,0);
result->curpos = result->curpos + 2;
*buffer = result;
FINISHED:
if ( prlist )
{
xfree(prlist);
}
return 0;
}
/*-------------------------------------------------------------------------*/
void SLPDKnownDARegisterAll(SLPMessage daadvert, int immortalonly)
/* registers all services with specified DA */
/*-------------------------------------------------------------------------*/
{
SLPBuffer buf;
SLPMessage msg;
SLPSrvReg* srvreg;
SLPDSocket* sock;
SLPBuffer sendbuf = 0;
void* handle = 0;
/*---------------------------------------------------------------*/
/* Check to see if the database is empty and open an enumeration */
/* handle if it is not empty */
/*---------------------------------------------------------------*/
if ( SLPDDatabaseIsEmpty() )
{
return;
}
/*--------------------------------------*/
/* Never do a Register All to ourselves */
/*--------------------------------------*/
if ( SLPCompareString(G_SlpdProperty.myUrlLen,
G_SlpdProperty.myUrl,
daadvert->body.daadvert.urllen,
daadvert->body.daadvert.url) == 0 )
{
return;
}
handle = SLPDDatabaseEnumStart();
if ( handle == 0 )
{
return;
}
/*----------------------------------------------*/
/* Establish a new connection with the known DA */
/*----------------------------------------------*/
sock = SLPDOutgoingConnect(&(daadvert->peer.sin_addr));
if ( sock )
{
while ( 1 )
{
msg = SLPDDatabaseEnum(handle, &msg, &buf);
if ( msg == NULL ) break;
srvreg = &(msg->body.srvreg);
/*-----------------------------------------------*/
/* If so instructed, skip mortal registrations */
/*-----------------------------------------------*/
if ( immortalonly &&
srvreg->urlentry.lifetime < SLP_LIFETIME_MAXIMUM )
{
continue;
}
/*---------------------------------------------------------*/
/* Only register local (or static) registrations of scopes */
/* supported by peer DA */
/*---------------------------------------------------------*/
if ( ( srvreg->source == SLP_REG_SOURCE_LOCAL ||
srvreg->source == SLP_REG_SOURCE_STATIC ) &&
SLPIntersectStringList(srvreg->scopelistlen,
srvreg->scopelist,
srvreg->scopelistlen,
srvreg->scopelist) )
{
sendbuf = SLPBufferDup(buf);
if ( sendbuf )
{
/*--------------------------------------------------*/
/* link newly constructed buffer to socket sendlist */
/*--------------------------------------------------*/
SLPListLinkTail(&(sock->sendlist),(SLPListItem*)sendbuf);
if ( sock->state == STREAM_CONNECT_IDLE )
{
sock->state = STREAM_WRITE_FIRST;
}
}
}
}
}
SLPDDatabaseEnumEnd(handle);
}
/*-------------------------------------------------------------------------*/
int MakeSrvderegFromSrvReg(SLPMessage msg,
SLPBuffer inbuf,
SLPBuffer* outbuf)
/* Pack a buffer with a SrvDereg message using information from an existing
* SrvReg message
*
* Caller must free outbuf
*-------------------------------------------------------------------------*/
{
int size;
SLPBuffer sendbuf;
SLPSrvReg* srvreg;
srvreg = &(msg->body.srvreg);
/*-------------------------------------------------------------*/
/* ensure the buffer is big enough to handle the whole srvdereg*/
/*-------------------------------------------------------------*/
size = msg->header.langtaglen + 18; /* 14 bytes for header */
/* 2 bytes for scopelen */
/* see below for URLEntry */
/* 2 bytes for taglist len */
if ( srvreg->urlentry.opaque )
{
size += srvreg->urlentry.opaquelen;
}
else
{
size += 6; /* +6 for the static portion of the url-entry */
size += srvreg->urlentry.urllen;
}
size += srvreg->scopelistlen;
/* taglistlen is always 0 */
*outbuf = sendbuf = SLPBufferAlloc(size);
if (*outbuf == NULL)
{
return SLP_ERROR_INTERNAL_ERROR;
}
/*----------------------*/
/* Construct a SrvDereg */
/*----------------------*/
/*version*/
*(sendbuf->start) = 2;
/*function id*/
*(sendbuf->start + 1) = SLP_FUNCT_SRVDEREG;
/*length*/
ToUINT24(sendbuf->start + 2, size);
/*flags*/
ToUINT16(sendbuf->start + 5,
(size > SLP_MAX_DATAGRAM_SIZE ? SLP_FLAG_OVERFLOW : 0));
/*ext offset*/
ToUINT24(sendbuf->start + 7,0);
/*xid*/
ToUINT16(sendbuf->start + 10,SLPXidGenerate());
/*lang tag len*/
ToUINT16(sendbuf->start + 12,msg->header.langtaglen);
/*lang tag*/
memcpy(sendbuf->start + 14,
msg->header.langtag,
msg->header.langtaglen);
sendbuf->curpos = sendbuf->start + 14 + msg->header.langtaglen;
/* scope list */
ToUINT16(sendbuf->curpos, srvreg->scopelistlen);
sendbuf->curpos = sendbuf->curpos + 2;
memcpy(sendbuf->curpos,srvreg->scopelist,srvreg->scopelistlen);
sendbuf->curpos = sendbuf->curpos + srvreg->scopelistlen;
/* the urlentry */
#ifdef ENABLE_SLPv1
if ( srvreg->urlentry.opaque == 0 )
{
/* url-entry reserved */
*sendbuf->curpos = 0;
sendbuf->curpos += 1;
/* url-entry lifetime */
ToUINT16(sendbuf->curpos,srvreg->urlentry.lifetime);
sendbuf->curpos = sendbuf->curpos + 2;
/* url-entry urllen */
ToUINT16(sendbuf->curpos,srvreg->urlentry.urllen);
sendbuf->curpos += 2;
/* url-entry url */
memcpy(sendbuf->curpos,
srvreg->urlentry.url,
srvreg->urlentry.urllen);
sendbuf->curpos += srvreg->urlentry.urllen;
/* url-entry authcount */
*sendbuf->curpos = 0;
sendbuf->curpos += 1;
}
else
#endif /* ENABLE_SLPv1 */
{
memcpy(sendbuf->curpos,
srvreg->urlentry.opaque,
srvreg->urlentry.opaquelen);
sendbuf->curpos += srvreg->urlentry.opaquelen;
}
/* taglist (always 0) */
ToUINT16(sendbuf->curpos,0);
sendbuf->curpos += 1;
return 0;
}
/*-------------------------------------------------------------------------*/
void SLPDKnownDADeregisterAll(SLPMessage daadvert)
/* de-registers all services with specified DA */
/*-------------------------------------------------------------------------*/
{
SLPBuffer buf;
SLPMessage msg;
SLPSrvReg* srvreg;
SLPDSocket* sock;
SLPBuffer sendbuf = 0;
void* handle = 0;
/*---------------------------------------------------------------*/
/* Check to see if the database is empty and open an enumeration */
/* handle if it is not empty */
/*---------------------------------------------------------------*/
if ( SLPDDatabaseIsEmpty() )
{
return;
}
handle = SLPDDatabaseEnumStart();
if ( handle == 0 )
{
return;
}
/* Establish a new connection with the known DA */
sock = SLPDOutgoingConnect(&(daadvert->peer.sin_addr));
if ( sock )
{
while ( 1 )
{
msg = SLPDDatabaseEnum(handle, &msg, &buf);
if ( msg == NULL ) break;
srvreg = &(msg->body.srvreg);
/*-------------------------------------------------*/
/* Deregister all local (and static) registrations */
/*-------------------------------------------------*/
if ( srvreg->source == SLP_REG_SOURCE_LOCAL ||
srvreg->source == SLP_REG_SOURCE_STATIC )
{
if(MakeSrvderegFromSrvReg(msg,buf,&sendbuf) == 0)
{
/*--------------------------------------------------*/
/* link newly constructed buffer to socket sendlist */
/*--------------------------------------------------*/
SLPListLinkTail(&(sock->sendlist),(SLPListItem*)sendbuf);
if ( sock->state == STREAM_CONNECT_IDLE )
{
sock->state = STREAM_WRITE_FIRST;
}
}
}
}
}
SLPDDatabaseEnumEnd(handle);
}
/*=========================================================================*/
int SLPDKnownDAFromDHCP()
/* Queries DHCP for configured DA's. */
/* */
/* returns zero on success, Non-zero on failure */
/*=========================================================================*/
{
SLPBuffer buf;
DHCPContext ctx;
SLPDSocket* sock;
struct in_addr daaddr;
unsigned char * alp;
unsigned char dhcpOpts[] = {TAG_SLP_SCOPE, TAG_SLP_DA};
*ctx.scopelist = 0;
ctx.addrlistlen = 0;
DHCPGetOptionInfo(dhcpOpts, sizeof(dhcpOpts), DHCPParseSLPTags, &ctx);
alp = ctx.addrlist;
while(ctx.addrlistlen >= 4)
{
memcpy(&daaddr.s_addr, alp, 4);
if (daaddr.s_addr)
{
/*--------------------------------------------------------
Get an outgoing socket to the DA and set it up to make
the service:directoryagent request
--------------------------------------------------------*/
sock = SLPDOutgoingConnect(&daaddr);
if (sock)
{
buf = 0;
if (MakeActiveDiscoveryRqst(0,&buf) == 0)
{
if (sock->state == STREAM_CONNECT_IDLE)
sock->state = STREAM_WRITE_FIRST;
SLPListLinkTail(&(sock->sendlist),(SLPListItem*)buf);
if (sock->state == STREAM_CONNECT_IDLE)
sock->state = STREAM_WRITE_FIRST;
}
}
}
ctx.addrlistlen -= 4;
alp += 4;
}
return 0;
}
/*=========================================================================*/
int SLPKnownDAFromProperties()
/* Queries static configuration for DA's. */
/* */
/* returns zero on success, Non-zero on failure */
/*=========================================================================*/
{
char* temp;
char* tempend;
char* slider1;
char* slider2;
struct hostent* he;
struct in_addr daaddr;
SLPDSocket* sock;
SLPBuffer buf;
if (G_SlpdProperty.DAAddresses && *G_SlpdProperty.DAAddresses)
{
temp = slider1 = xstrdup(G_SlpdProperty.DAAddresses);
if (temp)
{
tempend = temp + strlen(temp);
while (slider1 < tempend)
{
while (*slider1 && *slider1 == ' ') slider1++;
slider2 = slider1;
while (*slider2 && *slider2 != ',') slider2++;
*slider2++ = 0;
daaddr.s_addr = 0;
if(inet_aton(slider1, &daaddr) == 0)
{
he = gethostbyname(slider1);
if (he)
daaddr.s_addr = *((unsigned int*)(he->h_addr_list[0]));
}
if(daaddr.s_addr)
{
/*--------------------------------------------------------*/
/* Get an outgoing socket to the DA and set it up to make */
/* the service:directoryagent request */
/*--------------------------------------------------------*/
sock = SLPDOutgoingConnect(&daaddr);
if (sock)
{
buf = 0;
if (MakeActiveDiscoveryRqst(0,&buf) == 0)
{
if (sock->state == STREAM_CONNECT_IDLE)
sock->state = STREAM_WRITE_FIRST;
SLPListLinkTail(&(sock->sendlist),(SLPListItem*)buf);
if (sock->state == STREAM_CONNECT_IDLE)
sock->state = STREAM_WRITE_FIRST;
}
}
}
slider1 = slider2;
}
xfree(temp);
}
}
return 0;
}
/*=========================================================================*/
int SLPDKnownDAInit()
/* Initializes the KnownDA list. Removes all entries and adds entries */
/* that are statically configured. Adds entries configured through DHCP. */
/* */
/* returns zero on success, Non-zero on failure */
/*=========================================================================*/
{
/*--------------------------------------*/
/* Set initialize the DAAdvert database */
/*--------------------------------------*/
SLPDatabaseInit(&G_SlpdKnownDAs);
/*-----------------------------------------------------------------*/
/* Added statically configured DAs to the Known DA List by sending */
/* active DA discovery requests directly to them */
/*-----------------------------------------------------------------*/
SLPKnownDAFromProperties();
/*-----------------------------------------------------------------*/
/* Discover DHCP DA's and add them to the active discovery list. */
/*-----------------------------------------------------------------*/
SLPDKnownDAFromDHCP();
/*----------------------------------------*/
/* Lastly, Perform first active discovery */
/*----------------------------------------*/
SLPDKnownDAActiveDiscovery(0);
return 0;
}
/*=========================================================================*/
int SLPDKnownDADeinit()
/* Deinitializes the KnownDA list. Removes all entries and deregisters */
/* all services. */
/* */
/* returns zero on success, Non-zero on failure */
/*=========================================================================*/
{
SLPDatabaseHandle dh;
SLPDatabaseEntry* entry;
dh = SLPDatabaseOpen(&G_SlpdKnownDAs);
if ( dh )
{
/*------------------------------------*/
/* Unregister all local registrations */
/*------------------------------------*/
while ( 1 )
{
entry = SLPDatabaseEnum(dh);
if ( entry == NULL ) break;
SLPDKnownDADeregisterAll(entry->msg);
}
SLPDatabaseClose(dh);
}
SLPDatabaseDeinit(&G_SlpdKnownDAs);
return 0;
}
/*=========================================================================*/
int SLPDKnownDAAdd(SLPMessage msg, SLPBuffer buf)
/* Adds a DA to the known DA list if it is new, removes it if DA is going */
/* down or adjusts entry if DA changed. */
/* */
/* msg (IN) DAAdvert Message descriptor */
/* */
/* buf (IN) The DAAdvert message buffer */
/* */
/* returns Zero on success, Non-zero on error */
/*=========================================================================*/
{
SLPDatabaseEntry* entry;
SLPDAAdvert* entrydaadvert;
SLPDAAdvert* daadvert;
struct in_addr daaddr;
SLPParsedSrvUrl* parsedurl = NULL;
int result = 0;
SLPDatabaseHandle dh = NULL;
dh = SLPDatabaseOpen(&G_SlpdKnownDAs);
if ( dh == NULL )
{
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
/* daadvert is the DAAdvert message being added */
daadvert = &(msg->body.daadvert);
/* --------------------------------------------------------
* Make sure that the peer address in the DAAdvert matches
* the host in the DA service URL.
*---------------------------------------------------------
*/
if (SLPParseSrvUrl(daadvert->urllen,
daadvert->url,
&parsedurl))
{
/* could not parse the DA service url */
result = SLP_ERROR_PARSE_ERROR;
goto CLEANUP;
}
if (SLPNetResolveHostToAddr(parsedurl->host,&daaddr))
{
/* Unable to resolve the host in the DA advert to an address */
xfree(parsedurl);
result = SLP_ERROR_PARSE_ERROR;
goto CLEANUP;
}
/* free the parsed url created in call to SLPParseSrvUrl() */
xfree(parsedurl);
/* set the peer address in the DAAdvert message so that it matches
* the address the DA service URL resolves to
*/
msg->peer.sin_addr = daaddr;
/*-----------------------------------------------------*/
/* Check to see if there is already an identical entry */
/*-----------------------------------------------------*/
while ( 1 )
{
entry = SLPDatabaseEnum(dh);
if ( entry == NULL ) break;
/* entrydaadvert is the DAAdvert message from the database */
entrydaadvert = &(entry->msg->body.daadvert);
/* Assume DAs are identical if their URLs match */
if ( SLPCompareString(entrydaadvert->urllen,
entrydaadvert->url,
daadvert->urllen,
daadvert->url) == 0 )
{
#ifdef ENABLE_SLPv2_SECURITY
if ( G_SlpdProperty.checkSourceAddr &&
memcmp(&(entry->msg->peer.sin_addr),
&(msg->peer.sin_addr),
sizeof(struct in_addr)) )
{
SLPDatabaseClose(dh);
result = SLP_ERROR_AUTHENTICATION_FAILED;
goto CLEANUP;
}
/* make sure an unauthenticated DAAdvert can't replace */
/* an authenticated one */
if ( entrydaadvert->authcount &&
entrydaadvert->authcount != daadvert->authcount )
{
SLPDatabaseClose(dh);
result = SLP_ERROR_AUTHENTICATION_FAILED;
goto CLEANUP;
}
#endif
if ( daadvert->bootstamp != 0 &&
daadvert->bootstamp <= entrydaadvert->bootstamp )
{
/* Advertising DA must have went down then came back up */
SLPDKnownDARegisterAll(msg,0);
}
/* Remove the entry that is the same as the advertised entry */
/* so that we can put the new advertised entry back in */
SLPDatabaseRemove(dh,entry);
break;
}
}
/* Make sure the DA is not dying */
if (daadvert->bootstamp != 0)
{
if ( entry == 0 )
{
/* create a new database entry using the DAAdvert message */
entry = SLPDatabaseEntryCreate(msg,buf);
if (entry)
{
SLPDatabaseAdd(dh, entry);
/* register all the services we know about with this new DA */
SLPDKnownDARegisterAll(msg,0);
/* log the addition of a new DA */
SLPDLogDAAdvertisement("Addition",entry);
}
else
{
/* Could not create a new entry */
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
}
else
{
/* The advertising DA is not new to us, but the old entry */
/* has been deleted from our database so that the new entry */
/* with its up to date time stamp can be put back in. */
/* create a new database entry using the DAAdvert message */
entry = SLPDatabaseEntryCreate(msg,buf);
if (entry)
{
SLPDatabaseAdd(dh, entry);
}
else
{
/* Could not create a new entry */
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
}
SLPDatabaseClose(dh);
return result;
}
else
{
/* DA is dying */
if (entry)
{
/* Dying DA was found in our KnownDA database. Log that it
* was removed.
*/
SLPDLogDAAdvertisement("Removed",entry);
}
}
CLEANUP:
/* If we are here, we need to cleanup the message descriptor and the */
/* message buffer because they were not added to the database and not */
/* cleaning them up would result in a memory leak */
/* We also need to make sure the Database handle is closed. */
SLPMessageFree(msg);
SLPBufferFree(buf);
if (dh) SLPDatabaseClose(dh);
return result;
}
/*=========================================================================*/
void SLPDKnownDARemove(struct in_addr* addr)
/* Removes known DAs that sent DAAdverts from the specified in_addr */
/*=========================================================================*/
{
SLPDatabaseHandle dh;
SLPDatabaseEntry* entry;
dh = SLPDatabaseOpen(&G_SlpdKnownDAs);
if ( dh )
{
/*-----------------------------------------------------*/
/* Check to see if there is already an identical entry */
/*-----------------------------------------------------*/
while ( 1 )
{
entry = SLPDatabaseEnum(dh);
if ( entry == NULL ) break;
/* Assume DAs are identical if their peer match */
if ( memcmp(addr,&(entry->msg->peer.sin_addr),sizeof(*addr)) == 0 )
{
SLPDatabaseRemove(dh,entry);
SLPDLogDAAdvertisement("Removal",entry);
break;
}
}
SLPDatabaseClose(dh);
}
}
/*=========================================================================*/
void* SLPDKnownDAEnumStart()
/* Start an enumeration of all Known DAs */
/* */
/* Returns: An enumeration handle that is passed to subsequent calls to */
/* SLPDKnownDAEnum(). Returns NULL on failure. Returned */
/* enumeration handle (if not NULL) must be passed to */
/* SLPDKnownDAEnumEnd() when you are done with it. */
/*=========================================================================*/
{
return SLPDatabaseOpen(&G_SlpdKnownDAs);
}
/*=========================================================================*/
SLPMessage SLPDKnownDAEnum(void* eh, SLPMessage* msg, SLPBuffer* buf)
/* Enumerate through all Known DAs */
/* */
/* eh (IN) pointer to opaque data that is used to maintain */
/* enumerate entries. Pass in a pointer to NULL to start */
/* enumeration. */
/* */
/* msg (OUT) pointer to the DAAdvert message descriptor */
/* */
/* buf (OUT) pointer to the DAAdvert message buffer */
/* */
/* returns: Pointer to enumerated entry or NULL if end of enumeration */
/*=========================================================================*/
{
SLPDatabaseEntry* entry;
entry = SLPDatabaseEnum((SLPDatabaseHandle) eh);
if ( entry )
{
*msg = entry->msg;
*buf = entry->buf;
}
else
{
*msg = 0;
*buf = 0;
}
return *msg;
}
/*=========================================================================*/
void SLPDKnownDAEnumEnd(void* eh)
/* End an enumeration started by SLPDKnownDAEnumStart() */
/* */
/* Parameters: eh (IN) The enumeration handle returned by */
/* SLPDKnownDAEnumStart() */
/*=========================================================================*/
{
if ( eh )
{
SLPDatabaseClose((SLPDatabaseHandle)eh);
}
}
/*=========================================================================*/
int SLPDKnownDAGenerateMyDAAdvert(int errorcode,
int deadda,
int xid,
SLPBuffer* sendbuf)
/* Pack a buffer with a DAAdvert using information from a SLPDAentry */
/* */
/* errorcode (IN) the errorcode for the DAAdvert */
/* */
/* xid (IN) the xid to for the DAAdvert */
/* */
/* daentry (IN) pointer to the daentry that contains the rest of the info */
/* to make the DAAdvert */
/* */
/* sendbuf (OUT) pointer to the SLPBuffer that will be packed with a */
/* DAAdvert */
/* */
/* returns: zero on success, non-zero on error */
/*=========================================================================*/
{
int size;
SLPBuffer result = *sendbuf;
#ifdef ENABLE_SLPv2_SECURITY
int daadvertauthlen = 0;
unsigned char* daadvertauth = 0;
int spistrlen = 0;
char* spistr = 0;
G_SlpdProperty.DATimestamp += 1;
if ( G_SlpdProperty.securityEnabled )
{
SLPSpiGetDefaultSPI(G_SlpdSpiHandle,
SLPSPI_KEY_TYPE_PRIVATE,
&spistrlen,
&spistr);
SLPAuthSignDAAdvert(G_SlpdSpiHandle,
spistrlen,
spistr,
G_SlpdProperty.DATimestamp,
G_SlpdProperty.myUrlLen,
G_SlpdProperty.myUrl,
0,
0,
G_SlpdProperty.useScopesLen,
G_SlpdProperty.useScopes,
spistrlen,
spistr,
&daadvertauthlen,
&daadvertauth);
}
#else
G_SlpdProperty.DATimestamp += 1;
#endif
/*-------------------------------------------------------------*/
/* ensure the buffer is big enough to handle the whole srvrply */
/*-------------------------------------------------------------*/
size = G_SlpdProperty.localeLen + 29; /* 14 bytes for header */
/* 2 errorcode */
/* 4 bytes for timestamp */
/* 2 bytes for url len */
/* 2 bytes for scope list len */
/* 2 bytes for attr list len */
/* 2 bytes for spi str len */
/* 1 byte for authblock count */
size += G_SlpdProperty.myUrlLen;
size += G_SlpdProperty.useScopesLen;
#ifdef ENABLE_SLPv2_SECURITY
size += spistrlen;
size += daadvertauthlen;
#endif
result = SLPBufferRealloc(result, size);
if ( result == 0 )
{
/* Out of memory, what should we do here! */
errorcode = SLP_ERROR_INTERNAL_ERROR;
goto FINISHED;
}
/*----------------*/
/* Add the header */
/*----------------*/
/*version*/
*(result->start) = 2;
/*function id*/
*(result->start + 1) = SLP_FUNCT_DAADVERT;
/*length*/
ToUINT24(result->start + 2, size);
/*flags*/
ToUINT16(result->start + 5,
(size > SLP_MAX_DATAGRAM_SIZE ? SLP_FLAG_OVERFLOW : 0));
/*ext offset*/
ToUINT24(result->start + 7,0);
/*xid*/
ToUINT16(result->start + 10,xid);
/*lang tag len*/
ToUINT16(result->start + 12, G_SlpdProperty.localeLen);
/*lang tag*/
memcpy(result->start + 14,
G_SlpdProperty.locale,
G_SlpdProperty.localeLen);
result->curpos = result->start + 14 + G_SlpdProperty.localeLen;
/*--------------------------*/
/* Add rest of the DAAdvert */
/*--------------------------*/
/* error code */
ToUINT16(result->curpos,errorcode);
result->curpos = result->curpos + 2;
if ( errorcode == 0 )
{
/* timestamp */
if ( deadda )
{
ToUINT32(result->curpos,0);
}
else
{
ToUINT32(result->curpos,G_SlpdProperty.DATimestamp);
}
result->curpos = result->curpos + 4;
/* url len */
ToUINT16(result->curpos, G_SlpdProperty.myUrlLen);
result->curpos = result->curpos + 2;
/* url */
memcpy(result->curpos,
G_SlpdProperty.myUrl,
G_SlpdProperty.myUrlLen);
result->curpos = result->curpos + G_SlpdProperty.myUrlLen;
/* scope list len */
ToUINT16(result->curpos, G_SlpdProperty.useScopesLen);
result->curpos = result->curpos + 2;
/* scope list */
memcpy(result->curpos,
G_SlpdProperty.useScopes,
G_SlpdProperty.useScopesLen);
result->curpos = result->curpos + G_SlpdProperty.useScopesLen;
/* attr list len */
ToUINT16(result->curpos, 0);
result->curpos = result->curpos + 2;
/* attr list */
/* memcpy(result->start, ???, 0); */
/* result->curpos = result->curpos + daentry->attrlistlen; */
/* SPI List */
#ifdef ENABLE_SLPv2_SECURITY
ToUINT16(result->curpos,spistrlen);
result->curpos = result->curpos + 2;
memcpy(result->curpos,spistr,spistrlen);
result->curpos = result->curpos + spistrlen;
#else
ToUINT16(result->curpos,0);
result->curpos = result->curpos + 2;
#endif
/* authblock count */
#ifdef ENABLE_SLPv2_SECURITY
if ( daadvertauth )
{
/* authcount */
*(result->curpos) = 1;
result->curpos = result->curpos + 1;
/* authblock */
memcpy(result->curpos,daadvertauth,daadvertauthlen);
result->curpos = result->curpos + daadvertauthlen;
}
else
#endif
{
*(result->curpos) = 0;
result->curpos = result->curpos + 1;
}
}
FINISHED:
#ifdef ENABLE_SLPv2_SECURITY
if ( daadvertauth ) xfree(daadvertauth);
if ( spistr ) xfree(spistr);
#endif
*sendbuf = result;
return errorcode;
}
#if defined(ENABLE_SLPv1)
/*=========================================================================*/
int SLPDKnownDAGenerateMyV1DAAdvert(int errorcode,
int encoding,
unsigned int xid,
SLPBuffer* sendbuf)
/* Pack a buffer with a v1 DAAdvert using information from a SLPDAentry */
/* */
/* errorcode (IN) the errorcode for the DAAdvert */
/* */
/* encoding (IN) the SLPv1 language encoding for the DAAdvert */
/* */
/* xid (IN) the xid to for the DAAdvert */
/* */
/* sendbuf (OUT) pointer to the SLPBuffer that will be packed with a */
/* DAAdvert */
/* */
/* returns: zero on success, non-zero on error */
/*=========================================================================*/
{
int size = 0;
int urllen = INT_MAX;
int scopelistlen = INT_MAX;
SLPBuffer result = *sendbuf;
/*-------------------------------------------------------------*/
/* ensure the buffer is big enough to handle the whole srvrply */
/*-------------------------------------------------------------*/
size = 18; /* 12 bytes for header */
/* 2 errorcode */
/* 2 bytes for url len */
/* 2 bytes for scope list len */
if ( !errorcode )
{
errorcode = SLPv1ToEncoding(0,
&urllen,
encoding,
G_SlpdProperty.myUrl,
G_SlpdProperty.myUrlLen);
if ( !errorcode )
{
size += urllen;
#ifndef FAKE_UNSCOPED_DA
errorcode = SLPv1ToEncoding(0, &scopelistlen,
encoding,
G_SlpdProperty.useScopes,
G_SlpdProperty.useScopesLen);
#else
scopelistlen = 0; /* pretend that we're unscoped */
#endif
if ( !errorcode )
{
size += scopelistlen;
}
}
}
else
{
/* don't add these */
urllen = scopelistlen = 0;
}
result = SLPBufferRealloc(result, size);
if ( result == 0 )
{
/* TODO: out of memory, what should we do here! */
errorcode = SLP_ERROR_INTERNAL_ERROR;
goto FINISHED;
}
/*----------------*/
/* Add the header */
/*----------------*/
/*version*/
*(result->start) = 1;
/*function id*/
*(result->start + 1) = SLP_FUNCT_DAADVERT;
/*length*/
ToUINT16(result->start + 2, size);
/*flags - TODO we have to handle monoling and all that crap */
ToUINT16(result->start + 4,
(size > SLP_MAX_DATAGRAM_SIZE ? SLPv1_FLAG_OVERFLOW : 0));
/*dialect*/
*(result->start + 5) = 0;
/*language code*/
if ( G_SlpdProperty.locale )
{
memcpy(result->start + 6, G_SlpdProperty.locale, 2);
}
ToUINT16(result->start + 8, encoding);
/*xid*/
ToUINT16(result->start + 10,xid);
result->curpos = result->start + 12;
/*--------------------------*/
/* Add rest of the DAAdvert */
/*--------------------------*/
/* error code */
ToUINT16(result->curpos,errorcode);
result->curpos = result->curpos + 2;
ToUINT16(result->curpos, urllen);
result->curpos = result->curpos + 2;
/* url */
SLPv1ToEncoding(result->curpos,
&urllen,
encoding,
G_SlpdProperty.myUrl,
G_SlpdProperty.myUrlLen);
result->curpos = result->curpos + urllen;
/* scope list len */
ToUINT16(result->curpos, scopelistlen);
result->curpos = result->curpos + 2;
/* scope list */
#ifndef FAKE_UNSCOPED_DA
SLPv1ToEncoding(result->curpos,
&scopelistlen,
encoding,
G_SlpdProperty.useScopes,
G_SlpdProperty.useScopesLen);
#endif
result->curpos = result->curpos + scopelistlen;
FINISHED:
*sendbuf = result;
return errorcode;
}
#endif
/*=========================================================================*/
void SLPDKnownDAEcho(SLPMessage msg, SLPBuffer buf)
/* Echo a srvreg message to a known DA */
/* */
/* msg (IN) the SrvReg message descriptor */
/* */
/* buf (IN) the SrvReg message buffer to echo */
/* */
/* Returns: none */
/*=========================================================================*/
{
SLPBuffer dup;
SLPDatabaseHandle dh;
SLPDatabaseEntry* entry;
SLPDAAdvert* entrydaadvert;
SLPDSocket* sock;
const char* msgscope;
int msgscopelen;
/* Do not echo registrations if we are a DA unless they were made */
/* local through the API! */
if ( G_SlpdProperty.isDA && !ISLOCAL(msg->peer.sin_addr) )
{
return;
}
if ( msg->header.functionid == SLP_FUNCT_SRVREG )
{
msgscope = msg->body.srvreg.scopelist;
msgscopelen = msg->body.srvreg.scopelistlen;
}
else if ( msg->header.functionid == SLP_FUNCT_SRVDEREG )
{
msgscope = msg->body.srvdereg.scopelist;
msgscopelen = msg->body.srvdereg.scopelistlen;
}
else
{
/* We only echo SRVREG and SRVDEREG */
return;
}
dh = SLPDatabaseOpen(&G_SlpdKnownDAs);
if ( dh )
{
/*-----------------------------------------------------*/
/* Check to see if there is already an identical entry */
/*-----------------------------------------------------*/
while ( 1 )
{
entry = SLPDatabaseEnum(dh);
if ( entry == NULL ) break;
/* entrydaadvert is the DAAdvert message from the database */
entrydaadvert = &(entry->msg->body.daadvert);
/* Send to all DAs that have matching scope */
if ( SLPIntersectStringList(msgscopelen,
msgscope,
entrydaadvert->scopelistlen,
entrydaadvert->scopelist) )
{
/* Do not echo to ourselves if we are a DA*/
if ( G_SlpdProperty.isDA &&
SLPCompareString(G_SlpdProperty.myUrlLen,
G_SlpdProperty.myUrl,
entrydaadvert->urllen,
entrydaadvert->url) == 0 )
{
/* don't do anything because it makes no sense to echo */
/* to myself */
}
else
{
/*------------------------------------------*/
/* Load the socket with the message to send */
/*------------------------------------------*/
sock = SLPDOutgoingConnect(&(entry->msg->peer.sin_addr));
if ( sock )
{
dup = SLPBufferDup(buf);
if ( dup )
{
SLPListLinkTail(&(sock->sendlist),(SLPListItem*)dup);
if ( sock->state == STREAM_CONNECT_IDLE )
{
sock->state = STREAM_WRITE_FIRST;
}
}
else
{
sock->state = SOCKET_CLOSE;
}
}
}
}
}
SLPDatabaseClose(dh);
}
}
/*=========================================================================*/
void SLPDKnownDAActiveDiscovery(int seconds)
/* Add a socket to the outgoing list to do active DA discovery SrvRqst */
/* */
/* seconds (IN) number of seconds that expired since last call */
/* */
/* Returns: none */
/*=========================================================================*/
{
struct in_addr peeraddr;
SLPDSocket* sock;
/* Check to see if we should perform active DA detection */
if ( G_SlpdProperty.DAActiveDiscoveryInterval == 0 )
{
return;
}
/* When activeDiscoveryXmits is < 0 then we should not xmit any more */
if (G_SlpdProperty.activeDiscoveryXmits < 0)
{
return ;
}
if ( G_SlpdProperty.nextActiveDiscovery <= 0 )
{
if ( G_SlpdProperty.activeDiscoveryXmits == 0)
{
if (G_SlpdProperty.DAActiveDiscoveryInterval == 1)
{/* ensures xmit on first call */
/* don't xmit any more */
G_SlpdProperty.activeDiscoveryXmits = -1;
}
else
{
G_SlpdProperty.nextActiveDiscovery = G_SlpdProperty.DAActiveDiscoveryInterval;
G_SlpdProperty.activeDiscoveryXmits = 3;
}
}
G_SlpdProperty.activeDiscoveryXmits --;
/*--------------------------------------------------*/
/* Create new DATAGRAM socket with appropriate peer */
/*--------------------------------------------------*/
if ( G_SlpdProperty.isBroadcastOnly == 0 )
{
peeraddr.s_addr = htonl(SLP_MCAST_ADDRESS);
sock = SLPDSocketCreateDatagram(&peeraddr,DATAGRAM_MULTICAST);
}
else
{
peeraddr.s_addr = htonl(SLP_BCAST_ADDRESS);
sock = SLPDSocketCreateDatagram(&peeraddr,DATAGRAM_BROADCAST);
}
if ( sock )
{
/*----------------------------------------------------------*/
/* Make the srvrqst and add the socket to the outgoing list */
/*----------------------------------------------------------*/
MakeActiveDiscoveryRqst(1,&(sock->sendbuf));
SLPDOutgoingDatagramWrite(sock);
}
}
else
{
G_SlpdProperty.nextActiveDiscovery = G_SlpdProperty.nextActiveDiscovery - seconds;
}
}
/*=========================================================================*/
void SLPDKnownDAPassiveDAAdvert(int seconds, int dadead)
/* Send passive daadvert messages if properly configured and running as */
/* a DA */
/* */
/* seconds (IN) number seconds that elapsed since the last call to this */
/* function */
/* */
/* dadead (IN) nonzero if the DA is dead and a bootstamp of 0 should be */
/* sent */
/* */
/* Returns: none */
/*=========================================================================*/
{
struct in_addr peeraddr;
SLPDSocket* sock;
#ifdef ENABLE_SLPv1
SLPDSocket* v1sock;
#endif
/* SAs don't send passive DAAdverts */
if ( G_SlpdProperty.isDA == 0)
{
return;
}
/* Check to see if we should perform passive DA detection */
if ( G_SlpdProperty.passiveDADetection == 0 )
{
return;
}
if ( G_SlpdProperty.nextPassiveDAAdvert <= 0 || dadead )
{
G_SlpdProperty.nextPassiveDAAdvert = G_SlpdProperty.DAHeartBeat;
/*--------------------------------------------------*/
/* Create new DATAGRAM socket with appropriate peer */
/*--------------------------------------------------*/
if ( G_SlpdProperty.isBroadcastOnly == 0 )
{
peeraddr.s_addr = htonl(SLP_MCAST_ADDRESS);
sock = SLPDSocketCreateDatagram(&peeraddr,DATAGRAM_MULTICAST);
#ifdef ENABLE_SLPv1
if ( !dadead )
{
peeraddr.s_addr = htonl(SLPv1_DA_MCAST_ADDRESS);
v1sock = SLPDSocketCreateDatagram(&peeraddr,
DATAGRAM_MULTICAST);
}
else
{
v1sock = NULL;
}
#endif
}
else
{
peeraddr.s_addr = htonl(SLP_BCAST_ADDRESS);
sock = SLPDSocketCreateDatagram(&peeraddr,DATAGRAM_BROADCAST);
#ifdef ENABLE_SLPv1
if ( !dadead )
{
v1sock = SLPDSocketCreateDatagram(&peeraddr,DATAGRAM_BROADCAST);
}
else
{
v1sock = NULL;
}
#endif
}
/* Generate the DAAdvert and link it to the write list */
if ( sock )
{
if (SLPDKnownDAGenerateMyDAAdvert(0,dadead,0,&(sock->sendbuf)) == 0)
{
SLPDOutgoingDatagramWrite(sock);
}
else
{
SLPDSocketFree(sock);
}
}
#ifdef ENABLE_SLPv1
if ( v1sock )
{
/* SLPv1 does not support shutdown messages */
/* Generate the DAAdvert and write it */
if (SLPDKnownDAGenerateMyV1DAAdvert(0,
SLP_CHAR_UTF8,
SLPXidGenerate(),
&(v1sock->sendbuf)) == 0)
{
SLPDOutgoingDatagramWrite(v1sock);
}
else
{
SLPDSocketFree(v1sock);
}
}
#endif
}
else
{
G_SlpdProperty.nextPassiveDAAdvert = G_SlpdProperty.nextPassiveDAAdvert - seconds;
}
}
/*=========================================================================*/
void SLPDKnownDAImmortalRefresh(int seconds)
/* Refresh all SLP_LIFETIME_MAXIMUM services */
/* */
/* seconds (IN) time in seconds since last call */
/*=========================================================================*/
{
SLPDatabaseHandle dh;
SLPDatabaseEntry* entry;
SLPDAAdvert* entrydaadvert;
G_KnownDATimeSinceLastRefresh += seconds;
if ( G_KnownDATimeSinceLastRefresh >= SLP_LIFETIME_MAXIMUM - seconds )
{
/* Refresh all SLP_LIFETIME_MAXIMUM registrations */
dh = SLPDatabaseOpen(&G_SlpdKnownDAs);
if(dh)
{
/*-----------------------------------------------------*/
/* Check to see if there is already an identical entry */
/*-----------------------------------------------------*/
while ( 1 )
{
entry = SLPDatabaseEnum(dh);
if ( entry == NULL ) break;
/* entrydaadvert is the DAAdvert message from the database */
entrydaadvert = &(entry->msg->body.daadvert);
/* Assume DAs are identical if their URLs match */
if ( SLPCompareString(entrydaadvert->urllen,
entrydaadvert->url,
G_SlpdProperty.myUrlLen,
G_SlpdProperty.myUrl) )
{
SLPDKnownDARegisterAll(entry->msg,1);
}
}
SLPDatabaseClose(dh);
}
G_KnownDATimeSinceLastRefresh = 0;
}
}
/*=========================================================================*/
void SLPDKnownDADeRegisterWithAllDas(SLPMessage msg, SLPBuffer buf)
/* Deregister the registration described by the specified message */
/* */
/* msg (IN) A message descriptor for a SrvReg or SrvDereg message to */
/* deregister */
/* */
/* buf (IN) Message buffer associated with msg */
/* */
/* Returns: None */
/*=========================================================================*/
{
SLPBuffer sendbuf;
if(msg->header.functionid == SLP_FUNCT_SRVREG)
{
if(MakeSrvderegFromSrvReg(msg,buf, &sendbuf) == 0)
{
SLPDKnownDAEcho(msg,sendbuf);
SLPBufferFree(sendbuf);
}
}
else if (msg->header.functionid == SLP_FUNCT_SRVDEREG)
{
/* Simply echo the message through as is */
SLPDKnownDAEcho(msg,buf);
}
}
/*=========================================================================*/
void SLPDKnownDARegisterWithAllDas(SLPMessage msg, SLPBuffer buf)
/* Register the registration described by the specified message with all */
/* known DAs */
/* */
/* msg (IN) A message descriptor for a SrvReg or SrvDereg message to */
/* register */
/* */
/* buf (IN) Message buffer associated with msg */
/* */
/* Returns: None */
/*=========================================================================*/
{
if (msg->header.functionid == SLP_FUNCT_SRVREG)
{
/* Simply echo the message through as is */
SLPDKnownDAEcho(msg,buf);
}
}
#ifdef DEBUG
/*=========================================================================*/
void SLPDKnownDADump()
/*=========================================================================*/
{
SLPMessage msg;
SLPBuffer buf;
void* eh;
eh = SLPDKnownDAEnumStart();
if ( eh )
{
SLPDLog("========================================================================\n");
SLPDLog("Dumping KnownDAs \n");
SLPDLog("========================================================================\n");
while ( SLPDKnownDAEnum(eh, &msg, &buf) )
{
SLPDLogMessageInternals(msg);
SLPDLog("\n");
}
SLPDKnownDAEnumEnd(eh);
}
}
#endif