nw_messageHolder
nw_plugDataBufferGetNextMessageHolder(
nw_plugDataBuffer buffer,
nw_messageHolder prevMessageHolder,
nw_bool wholeMessagesOnly)
{
nw_messageHolder result = NULL;
nw_bool isFragmented;
nw_bool isLast;
nw_bool isTerminator;
NW_CONFIDENCE(buffer != NULL);
if (prevMessageHolder != NULL) {
if (!nw_plugDataBufferIsLastMessageHolder(buffer, prevMessageHolder)) {
/* Get next from previous */
result = (nw_messageHolder)NW_ALIGN(NW_PLUGDATABUFFER_DATA_ALIGNMENT,
UI(NW_MESSAGEHOLDER_DATA(prevMessageHolder)) +
nw_messageHolderGetLength(prevMessageHolder));
}
} else {
/* Get first */
result = NW_PLUGDATABUFFER_FIRSTMESSAGE(buffer);
}
if ((result != NULL) && (wholeMessagesOnly)) {
isFragmented = nw_plugBufferGetFragmentedFlag(nw_plugBuffer(buffer));
if (isFragmented) {
isLast = nw_plugDataBufferIsLastMessageHolder(buffer, result);
if (isLast) {
result = NULL;
}
}
if (result != NULL) {
isTerminator = nw_plugBufferGetTerminatorFlag(nw_plugBuffer(buffer));
if (isTerminator && (prevMessageHolder == NULL)) {
/* Skip this first message because it is the terminator of a
* previous message */
result = (nw_messageHolder)NW_ALIGN(NW_PLUGDATABUFFER_DATA_ALIGNMENT,
UI(NW_MESSAGEHOLDER_DATA(result)) + nw_messageHolderGetLength(result));
}
}
}
return result;
}
nw_bool
nw_plugDataBufferIsLastMessageHolder(
nw_plugDataBuffer buffer,
nw_messageHolder messageHolder)
{
nw_bool result = FALSE;
nw_seqNr fragmentLength;
nw_seqNr msgLength;
nw_seqNr offset;
NW_CONFIDENCE(buffer != NULL);
if (messageHolder != NULL) {
fragmentLength = nw_plugBufferGetLength(nw_plugBuffer(buffer));
msgLength = nw_messageHolderGetLength(messageHolder);
offset = UI(messageHolder) - UI(buffer) + sizeof(messageHolder->length);
result = ((offset + NW_ALIGN(NW_PLUGDATABUFFER_DATA_ALIGNMENT, msgLength)) == fragmentLength);
}
return result;
}
void
nw_plugChannelInitialize(
nw_plugChannel channel,
nw_seqNr seqNr,
nw_networkId nodeId,
nw_communicationKind communication,
nw_plugPartitions partitions,
nw_userData *userDataPtr,
const char *pathName,
nw_onFatalCallBack onFatal,
c_voidp onFatalUsrData)
{
nw_size fragmentLength;
nw_bool reliable;
nw_bool controlNeeded;
static sk_portNr sendingPortNr = NWCF_DEF(PortNr);
static sk_portNr receivingPortNr = NWCF_DEF(PortNr);
sk_portNr newPortNr;
nw_plugInterChannel *interChannelPtr = (nw_plugInterChannel *)userDataPtr;
char *defaultPartitionAddress;
/* Simple attributes */
channel->name = nw_stringDup(pathName);
channel->Id = seqNr;
channel->nodeId = nodeId;
channel->communication = communication;
channel->partitions = partitions;
/* Attributes to be read from config */
/* QoS-es*/
reliable = NWCF_SIMPLE_ATTRIB(Bool, pathName, reliable);
if (reliable) {
channel->reliabilityOffered = NW_REL_RELIABLE;
controlNeeded = TRUE;
/* Create object for inter-channel communication */
nw_plugInterChannelIncarnate(interChannelPtr, pathName);
channel->interChannelComm = *interChannelPtr;
} else {
channel->reliabilityOffered = NW_REL_BEST_EFFORT;
controlNeeded = FALSE;
/* NO object needed for inter-channel communication */
channel->interChannelComm = NULL;
}
/* Default, to be implemented */
channel->priorityOffered = NW_PRIORITY_UNDEFINED;
channel->latencyBudgetOffered = NW_LATENCYBUDGET_UNDEFINED;
/* Network fragment length */
fragmentLength = (nw_size)NWCF_SIMPLE_PARAM(Size, pathName, FragmentSize);
/* CHECKME, NWCF_MIN(FragmentSize) must be larger dealing with encryption */
if (fragmentLength < NWCF_MIN(FragmentSize)) {
NW_REPORT_WARNING_3("initializing network",
"Channel \"%s\": requested value %u for fragment size is too small, "
"using %u instead",
pathName, fragmentLength, NWCF_MIN(FragmentSize));
fragmentLength = NWCF_MIN(FragmentSize);
}
else if(fragmentLength > NWCF_MAX(FragmentSize)) {
NW_REPORT_WARNING_3("initializing network",
"Channel \"%s\": requested value " PA_SIZEFMT " for fragment size is too big, "
"using %u instead",
pathName, fragmentLength, NWCF_MAX(FragmentSize));
fragmentLength = NWCF_MAX(FragmentSize);
}
/* FIXME, this rounds up to multiple of 4, but it should round down to
* meet network constraints (??) */
/* round to lowest NW_FRAG_BOUNDARY multiplication higher than
* fragmentLength */
channel->fragmentLength =
NW_ALIGN(NW_PLUGDATABUFFER_ALIGNMENT, (nw_length)fragmentLength);
/* What is the base adress of the socket wee need ? */
nw_plugPartitionsGetDefaultPartition(partitions, &defaultPartitionAddress, NULL /* SecurityProfile not of interest */ );
switch (communication) {
case NW_COMM_SEND:
newPortNr = NWCF_DEFAULTED_PARAM(ULong, pathName, PortNr, sendingPortNr);
if (newPortNr == sendingPortNr) {
sendingPortNr+=2;
}
channel->socket = nw_socketSendNew(defaultPartitionAddress,
newPortNr, controlNeeded, pathName);
break;
case NW_COMM_RECEIVE:
newPortNr = NWCF_DEFAULTED_PARAM(
ULong, pathName, PortNr, receivingPortNr);
if (newPortNr == receivingPortNr) {
receivingPortNr+=2;
}
channel->socket = nw_socketReceiveNew(defaultPartitionAddress, newPortNr,
controlNeeded, pathName);
break;
default:
NW_CONFIDENCE(FALSE);
break;
}
channel->messageBox = nw_messageBoxNew();
channel->onFatal = onFatal;
channel->onFatalUsrData = onFatalUsrData;
channel->reconnectAllowed = NWCF_SIMPLE_ATTRIB(Bool,NWCF_ROOT(General) NWCF_SEP NWCF_NAME(Reconnection),allowed);
channel->crc = ut_crcNew(UT_CRC_KEY);
}
