/** Process a SrvTypeRequest message.
*
* @param[in] message - The message to process.
* @param[out] sendbuf - The response buffer to fill.
* @param[in] errorcode - The error code from the client request.
*
* @return Zero on success, or a non-zero SLP error on failure.
*
* @internal
*/
static int ProcessSrvTypeRqst(SLPMessage * message, SLPBuffer * sendbuf,
int errorcode)
{
size_t size = 0;
SLPDDatabaseSrvTypeRqstResult * db = 0;
SLPBuffer result = *sendbuf;
/* If errorcode is set, we can not be sure that message is good
Go directly to send response code
*/
if (errorcode)
goto RESPOND;
/* check for one of our IP addresses in the prlist */
if (SLPIntersectStringList(message->body.srvtyperqst.prlistlen,
message->body.srvtyperqst.prlist, G_SlpdProperty.interfacesLen,
G_SlpdProperty.interfaces))
{
/* Silently ignore */
result->end = result->start;
goto FINISHED;
}
/* make sure that we handle the scope */
if (SLPIntersectStringList(message->body.srvtyperqst.scopelistlen,
message->body.srvtyperqst.scopelist, G_SlpdProperty.useScopesLen,
G_SlpdProperty.useScopes) != 0)
errorcode = SLPDDatabaseSrvTypeRqstStart(message, &db);
else
errorcode = SLP_ERROR_SCOPE_NOT_SUPPORTED;
RESPOND:
/* do not send error codes or empty replies to multicast requests */
if (errorcode != 0 || db->srvtypelistlen == 0)
if (message->header.flags & SLP_FLAG_MCAST
|| SLPNetIsMCast(&(message->peer)))
{
result->end = result->start;
goto FINISHED;
}
/* ensure the buffer is big enough to handle the whole srvtyperply */
size = message->header.langtaglen + 18; /* 14 bytes for header */
/* 2 bytes for error code */
/* 2 bytes for srvtype len */
if (errorcode == 0)
size += db->srvtypelistlen;
/* Reallocate the result buffer */
result = SLPBufferRealloc(result, size);
if (result == 0)
{
errorcode = SLP_ERROR_INTERNAL_ERROR;
goto FINISHED;
}
/* Add the header */
/* version */
*result->curpos++ = 2;
/* function id */
*result->curpos++ = SLP_FUNCT_SRVTYPERPLY;
/* length */
PutUINT24(&result->curpos, size);
/* flags */
PutUINT16(&result->curpos, (size > (size_t)G_SlpdProperty.MTU?
SLP_FLAG_OVERFLOW: 0));
/* ext offset */
PutUINT24(&result->curpos, 0);
/* xid */
PutUINT16(&result->curpos, message->header.xid);
/* lang tag len */
PutUINT16(&result->curpos, message->header.langtaglen);
/* lang tag */
memcpy(result->curpos, message->header.langtag,
message->header.langtaglen);
result->curpos += message->header.langtaglen;
/* Add rest of the SrvTypeRply */
/* error code*/
PutUINT16(&result->curpos, errorcode);
if (errorcode == 0)
{
/* length of srvtype-list */
PutUINT16(&result->curpos, db->srvtypelistlen);
memcpy(result->curpos, db->srvtypelist, db->srvtypelistlen);
result->curpos += db->srvtypelistlen;
}
FINISHED:
if (db)
SLPDDatabaseSrvTypeRqstEnd(db);
*sendbuf = result;
return errorcode;
}
/*-------------------------------------------------------------------------*/
int v1ProcessSrvTypeRqst(struct sockaddr_in* peeraddr,
SLPMessage message,
SLPBuffer* sendbuf,
int errorcode)
/*-------------------------------------------------------------------------*/
{
char* type;
char* end;
char* slider;
int i;
int typelen;
int numsrvtypes = 0;
int size = 0;
SLPDDatabaseSrvTypeRqstResult* db = 0;
SLPBuffer result = *sendbuf;
/*-------------------------------------------------*/
/* Check for one of our IP addresses in the prlist */
/*-------------------------------------------------*/
if (SLPIntersectStringList(message->body.srvtyperqst.prlistlen,
message->body.srvtyperqst.prlist,
G_SlpdProperty.interfacesLen,
G_SlpdProperty.interfaces))
{
result->end = result->start;
goto FINISHED;
}
/*------------------------------------*/
/* Make sure that we handle the scope */
/*------------------------------------*/
if (SLPIntersectStringList(message->body.srvtyperqst.scopelistlen,
message->body.srvtyperqst.scopelist,
G_SlpdProperty.useScopesLen,
G_SlpdProperty.useScopes) != 0)
{
/*------------------------------------*/
/* Find service types in the database */
/*------------------------------------*/
errorcode = SLPDDatabaseSrvTypeRqstStart(message, &db);
}
else
{
errorcode = SLP_ERROR_SCOPE_NOT_SUPPORTED;
}
/*----------------------------------------------------------------*/
/* Do not send error codes or empty replies to multicast requests */
/*----------------------------------------------------------------*/
if (message->header.flags & SLP_FLAG_MCAST)
{
if (errorcode != 0 || db->srvtypelistlen == 0)
{
result->end = result->start;
goto FINISHED;
}
}
/*-----------------------------------------------------------------*/
/* ensure the buffer is big enough to handle the whole srvtyperply */
/*-----------------------------------------------------------------*/
size = 16; /* 12 bytes for header, 2 bytes for error code, 2 bytes
for num of service types */
if (errorcode == 0)
{
if (db->srvtypelistlen)
{
/* there has to be at least one service type*/
numsrvtypes = 1;
/* count the rest of the service types */
type = db->srvtypelist;
for (i=0; i< db->srvtypelistlen; i++)
{
if (type[i] == ',')
{
numsrvtypes += 1;
}
}
/* figure out how much memory is required for srvtype strings */
typelen = INT_MAX;
errorcode = SLPv1ToEncoding(0,
&typelen,
message->header.encoding,
db->srvtypelist,
db->srvtypelistlen);
/* TRICKY: we add in the numofsrvtypes + 1 to make room for the */
/* type length. We can do this because the ',' of the comma */
/* delimited list is one byte. */
size = size + typelen + numsrvtypes + 1;
}
else
{
numsrvtypes = 0;
}
}
/*-----------------*/
/* Allocate memory */
/*-----------------*/
result = SLPBufferRealloc(result,size);
if (result == 0)
{
errorcode = SLP_ERROR_INTERNAL_ERROR;
goto FINISHED;
}
/*----------------*/
/* Add the header */
/*----------------*/
/*version*/
*(result->start) = 1;
/*function id*/
*(result->start + 1) = SLP_FUNCT_SRVTYPERPLY;
/*length*/
ToUINT16(result->start + 2, size);
/*flags - TODO set the flags correctly */
*(result->start + 4) = message->header.flags |
(size > SLP_MAX_DATAGRAM_SIZE ? SLPv1_FLAG_OVERFLOW : 0);
/*dialect*/
*(result->start + 5) = 0;
/*language code*/
memcpy(result->start + 6, message->header.langtag, 2);
ToUINT16(result->start + 8, message->header.encoding);
/*xid*/
ToUINT16(result->start + 10, message->header.xid);
/*-----------------------------*/
/* Add rest of the SrvTypeRply */
/*-----------------------------*/
result->curpos = result->start + 12;
/* error code*/
ToUINT16(result->curpos, errorcode);
result->curpos += 2;
if (errorcode == 0)
{
/* num of service types */
ToUINT16(result->curpos, numsrvtypes);
result->curpos += 2;
/* service type strings */
type = db->srvtypelist;
slider = db->srvtypelist;
end = &(type[db->srvtypelistlen]);
for (i=0;i<numsrvtypes; i++)
{
while (slider < end && *slider != ',') slider++;
typelen = size;
/* put in the encoded service type */
SLPv1ToEncoding(result->curpos + 2,
&typelen,
message->header.encoding,
type,
slider - type);
/* slip in the typelen */
ToUINT16(result->curpos, typelen);
result->curpos += 2;
result->curpos += typelen;
slider ++; /* skip comma */
type = slider;
}
/* TODO - make sure we don't return generic types */
}
FINISHED:
if (db) SLPDDatabaseSrvTypeRqstEnd(db);
*sendbuf = result;
return errorcode;
}