static bool
_symbolicRegisterPrefix(MetisConfiguration *config, CPIRouteEntry *route)
{
bool success = false;
const char *symbolic = cpiRouteEntry_GetSymbolicName(route);
unsigned ifidx = metisSymbolicNameTable_Get(config->symbolicNameTable, symbolic);
if (ifidx != UINT32_MAX) {
cpiRouteEntry_SetInterfaceIndex(route, ifidx);
if (metisLogger_IsLoggable(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Debug)) {
metisLogger_Log(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Debug, __func__,
"Add route resolve name '%s' to connid %u",
symbolic, ifidx);
}
success = metisForwarder_AddOrUpdateRoute(config->metis, route);
} else {
if (metisLogger_IsLoggable(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Warning)) {
metisLogger_Log(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Warning, __func__,
"Add route symbolic name '%s' could not be resolved", symbolic);
}
// this is a failure
}
return success;
}
/**
* Reads from the socket to fill in the work buffer
*
* Reads one or more packets from the socket to the work buffer It will append to the work buffer.
* The BFP socket is non-blocking. The BPF interface may return multiple packets in one read
* that need to be parsed as in _darwinEthernet_ReadWorkBuffer().
*
* @param [in] ether The Darwin ethernet interface
*
* @retval true We added something to the work buffer
* @retval false Nothing was read
*
* Example:
* @code
* <#example#>
* @endcode
*/
static bool
_darwinEthernet_ReadSocket(MetisGenericEther *ether)
{
bool success = false;
if (metisLogger_IsLoggable(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug)) {
metisLogger_Log(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug, __func__,
"%s reading fd %d bufferLength %u", __func__, ether->etherSocket, ether->etherBufferLength);
}
// The buffer we're reading must be exactly ether->etherBufferLength
// TODO: Fix the parcEventBuffer_ReadFromFileDescriptor call to reserve that space so it's all there.
uint8_t tempBuffer[ether->etherBufferLength];
ssize_t read_length = read(ether->etherSocket, tempBuffer, ether->etherBufferLength);
if (read_length > 0) {
parcEventBuffer_Append(ether->workBuffer, tempBuffer, read_length);
if (read_length > 0) {
if (metisLogger_IsLoggable(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug)) {
metisLogger_Log(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug, __func__,
"%s read %zd bytes from fd %d",
__func__,
read_length,
ether->etherSocket);
}
success = true;
}
}
return success;
}
static bool
_metisConfiguration_AddConnectionEthernet(MetisConfiguration *config, CPIConnectionEthernet *etherConn, CPIAddress *linkAddress, MetisListenerOps *listenerOps)
{
bool success = false;
const char *symbolic = cpiConnectionEthernet_GetSymbolicName(etherConn);
if (!metisSymbolicNameTable_Exists(config->symbolicNameTable, symbolic)) {
const CPIAddress *remote = cpiConnectionEthernet_GetPeerLinkAddress(etherConn);
MetisAddressPair *pair = metisAddressPair_Create(linkAddress, remote);
MetisGenericEther *ether = metisEtherListener_GetGenericEtherFromListener(listenerOps);
if (ether) {
MetisIoOperations *ops = metisEtherConnection_Create(config->metis, ether, pair);
if (ops) {
MetisConnection *conn = metisConnection_Create(ops);
assertNotNull(conn, "Failed to create connection");
metisConnectionTable_Add(metisForwarder_GetConnectionTable(config->metis), conn);
metisSymbolicNameTable_Add(config->symbolicNameTable, symbolic, metisConnection_GetConnectionId(conn));
success = true;
if (metisLogger_IsLoggable(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Debug)) {
char *peerAddressString = cpiAddress_ToString(remote);
metisLogger_Log(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Debug, __func__,
"Add connection %s on %s to %s, connid %u",
symbolic,
cpiConnectionEthernet_GetInterfaceName(etherConn),
peerAddressString,
metisConnection_GetConnectionId(conn));
parcMemory_Deallocate((void **) &peerAddressString);
}
}
} else {
metisLogger_Log(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Error, __func__,
"Could not get MetisGenericEther for listener %p",
listenerOps);
}
metisAddressPair_Release(&pair);
} else {
if (metisLogger_IsLoggable(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Warning)) {
const CPIAddress *remote = cpiConnectionEthernet_GetPeerLinkAddress(etherConn);
char *peerAddressString = cpiAddress_ToString(remote);
metisLogger_Log(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Warning, __func__,
"Add connection %s on %s to %s failed, symbolic name exists",
symbolic,
cpiConnectionEthernet_GetInterfaceName(etherConn),
peerAddressString);
parcMemory_Deallocate((void **) &peerAddressString);
}
}
return success;
}
static void
_conn_eventcb(PARCEventQueue *event, PARCEventQueueEventType events, void *ioOpsVoid)
{
MetisIoOperations *ops = (MetisIoOperations *) ioOpsVoid;
_MetisStreamState *stream = (_MetisStreamState *) metisIoOperations_GetClosure(ops);
if (events & PARCEventQueueEventType_Connected) {
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Info)) {
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Info, __func__,
"Connection %u is connected", stream->id);
}
// if the stream was closed, do not transition to an UP state
if (!stream->isClosed) {
_setConnectionState(stream, true);
}
} else
if (events & PARCEventQueueEventType_EOF) {
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Info)) {
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Info, __func__,
"connid %u closed.",
stream->id);
}
parcEventQueue_Disable(stream->bufferEventVector, PARCEventType_Read);
_setConnectionState(stream, false);
if (!stream->isClosed) {
stream->isClosed = true;
// this will cause the connection manager to destroy the connection later
metisMessenger_Send(metisForwarder_GetMessenger(stream->metis), metisMissive_Create(MetisMissiveType_ConnectionClosed, stream->id));
}
} else
if (events & PARCEventQueueEventType_Error) {
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Error)) {
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Error, __func__,
"Got an error on the connection %u: %s", stream->id, strerror(errno));
}
parcEventQueue_Disable(stream->bufferEventVector, PARCEventType_Read | PARCEventType_Write);
_setConnectionState(stream, false);
if (!stream->isClosed) {
stream->isClosed = true;
// this will cause the connection manager to destroy the connection later
metisMessenger_Send(metisForwarder_GetMessenger(stream->metis), metisMissive_Create(MetisMissiveType_ConnectionClosed, stream->id));
}
}
/* None of the other events can happen here, since we haven't enabled
* timeouts */
}
// There's a bit too much going on in this function, need to break it
// apart for testability and style.
static MetisPITVerdict
_metisStandardPIT_ReceiveInterest(MetisPIT *generic, MetisMessage *interestMessage)
{
assertNotNull(generic, "Parameter pit must be non-null");
assertNotNull(interestMessage, "Parameter interestMessage must be non-null");
MetisStandardPIT *pit = metisPIT_Closure(generic);
MetisPitEntry *pitEntry = metisMatchingRulesTable_Get(pit->table, interestMessage);
if (pitEntry) {
// has it expired?
MetisTicks now = metisForwarder_GetTicks(pit->metis);
if (now < metisPitEntry_GetExpiryTime(pitEntry)) {
// what should we do about extending the lifetime? (case 819)
_metisPIT_ExtendLifetime(pit, pitEntry, interestMessage);
// Is the reverse path already in the PIT entry?
if (_metisPIT_IngressSetContains(pitEntry, metisMessage_GetIngressConnectionId(interestMessage))) {
// It is already in the PIT entry, so this is a retransmission, so forward it.
if (metisLogger_IsLoggable(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"Message %p existing entry (expiry %" PRIu64 ") and reverse path, forwarding",
(void *) interestMessage,
metisPitEntry_GetExpiryTime(pitEntry));
}
return MetisPITVerdict_Forward;
}
// It is in the PIT but this is the first interest for the reverse path
metisPitEntry_AddIngressId(pitEntry, metisMessage_GetIngressConnectionId(interestMessage));
if (metisLogger_IsLoggable(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"Message %p existing entry (expiry %" PRIu64 ") and reverse path is new, aggregate",
(void *) interestMessage,
metisPitEntry_GetExpiryTime(pitEntry));
}
return MetisPITVerdict_Aggregate;
}
// it's an old entry, remove it
metisMatchingRulesTable_RemoveFromBest(pit->table, interestMessage);
}
_metisPIT_StoreInTable(pit, interestMessage);
return MetisPITVerdict_Forward;
}
MetisGenericEther *
metisGenericEther_Create(MetisForwarder *metis, const char *deviceName, uint16_t etherType)
{
assertNotNull(metis, "Parameter metis must be non-null");
// The Darwin generic ether allows a NULL device name, it is used in the unit tests.
MetisGenericEther *ether = NULL;
if (metisEthernet_IsValidEthertype(etherType)) {
ether = parcObject_CreateInstance(MetisGenericEther);
ether->ethertype = etherType;
ether->logger = metisLogger_Acquire(metisForwarder_GetLogger(metis));
ether->etherSocket = -1; // invalid valid
ether->workBuffer = parcEventBuffer_Create();
ether->macAddress = NULL;
ether->mtu = metisSystem_InterfaceMtu(metis, deviceName);
_darwinEthernet_SetInterfaceAddress(ether, deviceName);
bool success = _darwinEthernet_SetupReceive(ether, deviceName);
if (success) {
if (metisLogger_IsLoggable(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Info)) {
char *str = parcBuffer_ToHexString(ether->macAddress);
metisLogger_Log(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Info, __func__,
"GenericEther %p created on device %s (%s) for ethertype 0x%04x fd %d bufferLength %u mtu %u",
(void *) ether, deviceName, str, etherType, ether->etherSocket, ether->etherBufferLength, ether->mtu);
parcMemory_Deallocate((void **) &str);
}
} else {
if (metisLogger_IsLoggable(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Error)) {
metisLogger_Log(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Error, __func__,
"GenericEther failed to created on device %s for ethertype 0x%04x",
deviceName, etherType);
}
// this will also null ether
metisGenericEther_Release(ðer);
}
assertTrue(ether->etherBufferLength < 65536, "Buffer length way too big, expected less than 65536 got %u", ether->etherBufferLength);
} else {
if (metisLogger_IsLoggable(metisForwarder_GetLogger(metis), MetisLoggerFacility_IO, PARCLogLevel_Error)) {
metisLogger_Log(metisForwarder_GetLogger(metis), MetisLoggerFacility_IO, PARCLogLevel_Error, __func__,
"GenericEther failed to created on device %s for ethertype 0x%04x, invalid ethertype",
deviceName, etherType);
}
}
return ether;
}
static MetisMessage *
_metisLRUContentStore_MatchInterest(MetisContentStoreInterface *storeImpl, MetisMessage *interest)
{
MetisMessage *result = NULL;
_MetisLRUContentStore *store = (_MetisLRUContentStore *) metisContentStoreInterface_GetPrivateData(storeImpl);
assertNotNull(store, "Parameter store must be non-null");
assertNotNull(interest, "Parameter interestMessage must be non-null");
assertTrue(metisMessage_GetType(interest) == MetisMessagePacketType_Interest,
"Parameter interestMessage must be an Interest");
// This will do the most restrictive lookup.
// a) If the interest has a ContentObjectHash restriction, it will look only in the ByNameAndObjectHash table.
// b) If it has a KeyId, it will look only in the ByNameAndKeyId table.
// c) otherwise, it looks only in the ByName table.
PARCHashCodeTable *table;
if (metisMessage_HasContentObjectHash(interest)) {
table = store->storageByNameAndObjectHashHash;
} else if (metisMessage_HasKeyId(interest)) {
table = store->indexByNameAndKeyIdHash;
} else {
table = store->indexByNameHash;
}
MetisContentStoreEntry *storeEntry = parcHashCodeTable_Get(table, interest);
if (storeEntry) {
metisContentStoreEntry_MoveToHead(storeEntry);
result = metisContentStoreEntry_GetMessage(storeEntry);
store->stats.countHits++;
if (metisLogger_IsLoggable(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"LRUContentStore %p matched interest %p (hits %" PRIu64 ", misses %" PRIu64 ")",
(void *) store, (void *) interest, store->stats.countHits, store->stats.countMisses);
}
} else {
store->stats.countMisses++;
if (metisLogger_IsLoggable(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"LRUContentStore %p missed interest %p (hits %" PRIu64 ", misses %" PRIu64 ")",
(void *) store, (void *) interest, store->stats.countHits, store->stats.countMisses);
}
}
return result;
}
MetisPIT *
metisStandardPIT_Create(MetisForwarder *metis)
{
assertNotNull(metis, "Parameter must be non-null");
size_t allocation = sizeof(MetisPIT) + sizeof(MetisStandardPIT);
MetisPIT *generic = parcMemory_AllocateAndClear(allocation);
assertNotNull(generic, "parcMemory_AllocateAndClear(%zu) returned NULL", allocation);
generic->closure = (uint8_t *) generic + sizeof(MetisPIT);
MetisStandardPIT *pit = metisPIT_Closure(generic);
pit->metis = metis;
pit->logger = metisLogger_Acquire(metisForwarder_GetLogger(metis));
pit->table = metisMatchingRulesTable_Create(_metisPIT_PitEntryDestroyer);
if (metisLogger_IsLoggable(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"PIT %p created",
(void *) pit);
}
generic->getPitEntry = _metisStandardPIT_GetPitEntry;
generic->receiveInterest = _metisStandardPIT_ReceiveInterest;
generic->release = _metisStandardPIT_Destroy;
generic->removeInterest = _metisStandardPIT_RemoveInterest;
generic->satisfyInterest = _metisStandardPIT_SatisfyInterest;
return generic;
}
static void
_metisStreamConnection_DestroyOperations(MetisIoOperations **opsPtr)
{
assertNotNull(opsPtr, "Parameter opsPtr must be non-null double pointer");
assertNotNull(*opsPtr, "Parameter opsPtr must dereference to non-null pointer");
MetisIoOperations *ops = *opsPtr;
assertNotNull(metisIoOperations_GetClosure(ops), "ops->context must not be null");
_MetisStreamState *stream = (_MetisStreamState *) metisIoOperations_GetClosure(ops);
parcEventQueue_Destroy(&stream->bufferEventVector);
metisAddressPair_Release(&stream->addressPair);
if (!stream->isClosed) {
stream->isClosed = true;
metisMessenger_Send(metisForwarder_GetMessenger(stream->metis), metisMissive_Create(MetisMissiveType_ConnectionClosed, stream->id));
}
metisMessenger_Send(metisForwarder_GetMessenger(stream->metis), metisMissive_Create(MetisMissiveType_ConnectionDestroyed, stream->id));
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Info)) {
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Info, __func__,
"StreamConnection %p destroyed", (void *) stream);
}
metisLogger_Release(&stream->logger);
parcMemory_Deallocate((void **) &stream);
parcMemory_Deallocate((void **) &ops);
*opsPtr = NULL;
}
void
metisConfiguration_Receive(MetisConfiguration *config, MetisMessage *message)
{
assertNotNull(config, "Parameter config must be non-null");
assertNotNull(message, "Parameter message must be non-null");
assertTrue(metisMessage_GetType(message) == MetisMessagePacketType_Control,
"Message must be type CPI, expected %02x got %02x",
MetisMessagePacketType_Control, metisMessage_GetType(message));
CCNxControl *control = metisMessage_CreateControlMessage(message);
unsigned ingressId = metisMessage_GetIngressConnectionId(message);
if (metisLogger_IsLoggable(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Debug)) {
char *str = parcJSON_ToCompactString(ccnxControl_GetJson(control));
metisLogger_Log(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Debug, __func__,
"%s received %s\n", __func__, str);
parcMemory_Deallocate((void **) &str);
}
CCNxControl *response = _processControl(config, control, ingressId);
metisConfiguration_SendResponse(config, response, ingressId);
ccnxControl_Release(&response);
ccnxControl_Release(&control);
metisMessage_Release(&message);
}
bool
metisTlvSkeleton_Parse(MetisTlvSkeleton *opaque, uint8_t *packet, MetisLogger *logger)
{
// do not assert invariants here. Parse will setup the invariants.
_InternalSkeleton *skeleton = (_InternalSkeleton *) opaque;
uint8_t version = packet[0];
switch (version) {
case 0:
_initialize(skeleton, &MetisTlvSchemaV0_Ops, packet, logger);
return MetisTlvSchemaV0_Ops.parse(opaque);
case 1:
_initialize(skeleton, &MetisTlvSchemaV1_Ops, packet, logger);
return MetisTlvSchemaV1_Ops.parse(opaque);
default:
if (metisLogger_IsLoggable(logger, MetisLoggerFacility_Message, PARCLogLevel_Warning)) {
metisLogger_Log(logger, MetisLoggerFacility_Message, PARCLogLevel_Warning, __func__,
"Parsing unknown packet version %u", version);
}
break;
}
return false;
}
bool
metisHopByHopFragmenter_Send(MetisHopByHopFragmenter *fragmenter, MetisMessage *message)
{
bool success = false;
// If the packet will fit in the MTU without fragmentation, do not use fragmentation
if (metisMessage_Length(message) > fragmenter->mtu) {
success = _sendFragments(fragmenter, message);
} else {
MetisMessage *copy = metisMessage_Acquire(message);
success = parcRingBuffer1x1_Put(fragmenter->sendQueue, copy);
if (!success) {
metisMessage_Release(©);
metisLogger_Log(fragmenter->logger, MetisLoggerFacility_IO, PARCLogLevel_Warning, __func__,
"Failed to add message %p to send queue", (void *) message);
} else {
if (metisLogger_IsLoggable(fragmenter->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug)) {
metisLogger_Log(fragmenter->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug, __func__,
"Add message %p to send queue", (void *) message);
}
}
}
return success;
}
/**
* @function metisStreamConnection_Send
* @abstract Non-destructive send of the message.
* @discussion
* Send uses metisMessage_CopyToStreamBuffer, which is a non-destructive write.
* The send may fail if there's no buffer space in the output queue.
*
* @param dummy is ignored. A stream has only one peer.
* @return <#return#>
*/
static bool
_metisStreamConnection_Send(MetisIoOperations *ops, const CPIAddress *dummy, MetisMessage *message)
{
assertNotNull(ops, "Parameter ops must be non-null");
assertNotNull(message, "Parameter message must be non-null");
_MetisStreamState *stream = (_MetisStreamState *) metisIoOperations_GetClosure(ops);
bool success = false;
if (stream->isUp) {
PARCEventBuffer *buffer = parcEventBuffer_GetQueueBufferOutput(stream->bufferEventVector);
size_t buffer_backlog = parcEventBuffer_GetLength(buffer);
parcEventBuffer_Destroy(&buffer);
if (buffer_backlog < OUTPUT_QUEUE_BYTES) {
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug)) {
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug, __func__,
"connid %u Writing %zu bytes to buffer with backlog %zu bytes",
stream->id,
metisMessage_Length(message),
buffer_backlog);
}
int failure = metisMessage_Write(stream->bufferEventVector, message);
if (failure == 0) {
success = true;
}
} else {
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Warning)) {
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Warning, __func__,
"connid %u Writing to buffer backlog %zu bytes DROP MESSAGE",
stream->id,
buffer_backlog);
}
}
} else {
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Error)) {
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Error, __func__,
"connid %u tried to send to down connection (isUp %d isClosed %d)",
stream->id,
stream->isUp,
stream->isClosed);
}
}
return success;
}
static void
_evictByStorePolicy(_MetisLRUContentStore *store, uint64_t currentTimeInMetisTicks)
{
// We need to make room. Here's the plan:
// 1) Check to see if anything has expired. If so, remove it and we're done. If not,
// 2) Check to see if anything has exceeded it's recommended cache time. If so, remove it and we're done. If not,
// 3) Remove the least recently used item.
MetisContentStoreEntry *entry = metisTimeOrderedList_GetOldest(store->indexByExpirationTime);
if (entry
&& metisContentStoreEntry_HasExpiryTimeTicks(entry)
&& (currentTimeInMetisTicks > metisContentStoreEntry_GetExpiryTimeTicks(entry))) {
// Found an expired entry. Remove it, and we're done.
store->stats.countExpiryEvictions++;
if (metisLogger_IsLoggable(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"ContentStore %p evict message %p by ExpiryTime (ExpiryTime evictions %" PRIu64 ")",
(void *) store, (void *) metisContentStoreEntry_GetMessage(entry),
store->stats.countExpiryEvictions);
}
_metisLRUContentStore_PurgeStoreEntry(store, entry);
} else {
// Check for entries that have exceeded RCT
entry = metisTimeOrderedList_GetOldest(store->indexByRecommendedCacheTime);
if (entry
&& metisContentStoreEntry_HasRecommendedCacheTimeTicks(entry)
&& (currentTimeInMetisTicks > metisContentStoreEntry_GetRecommendedCacheTimeTicks(entry))) {
// Found an entry passed it's RCT. Remove it, and we're done.
store->stats.countRCTEvictions++;
if (metisLogger_IsLoggable(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"ContentStore %p evict message %p by RCT (RCT evictions %" PRIu64 ")",
(void *) store, (void *) metisContentStoreEntry_GetMessage(entry),
store->stats.countRCTEvictions);
}
_metisLRUContentStore_PurgeStoreEntry(store, entry);
} else {
store->stats.countLruEvictions++;
_metisLRUContentStore_RemoveLeastUsed(store);
}
}
}
MetisConfigurationFile *
metisConfigurationFile_Create(MetisForwarder *metis, const char *filename)
{
assertNotNull(metis, "Parameter metis must be non-null");
assertNotNull(filename, "Parameter filename must be non-null");
MetisConfigurationFile *configFile = parcObject_CreateInstance(MetisConfigurationFile);
if (configFile) {
configFile->linesRead = 0;
configFile->metis = metis;
configFile->filename = parcMemory_StringDuplicate(filename, strlen(filename));
assertNotNull(configFile->filename, "Could not copy string '%s'", filename);
// setup the control state for the command parser
configFile->controlState = metisControlState_Create(configFile, _writeRead);
// we do not register Help commands
metisControlState_RegisterCommand(configFile->controlState, metisControlRoot_Create(configFile->controlState));
// open the file and make sure we can read it
configFile->fh = fopen(configFile->filename, "r");
if (configFile->fh) {
if (metisLogger_IsLoggable(metisForwarder_GetLogger(metis), MetisLoggerFacility_Config, PARCLogLevel_Debug)) {
metisLogger_Log(metisForwarder_GetLogger(metis), MetisLoggerFacility_Config, PARCLogLevel_Debug, __func__,
"Open config file %s",
configFile->filename);
}
} else {
if (metisLogger_IsLoggable(metisForwarder_GetLogger(metis), MetisLoggerFacility_Config, PARCLogLevel_Error)) {
metisLogger_Log(metisForwarder_GetLogger(metis), MetisLoggerFacility_Config, PARCLogLevel_Error, __func__,
"Could not open config file %s: (%d) %s",
configFile->filename,
errno,
strerror(errno));
}
// failure cleanup the object -- this nulls it so final return null be NULL
metisConfigurationFile_Release(&configFile);
}
}
return configFile;
}
/**
* Parses the work buffer to extract packets
*
* The work buffer should be filled in with a set of tuples (bh_hdrlen, frame, pad).
* The pad extends each packet out to BPF_WORDALIGN.
*
* If the CCNxMessage PacketLength says it is larger than the read capture length (caplen),
* then this is an invalid packet and it will be discarded. This error will result in a
* ReadWorkBufferResult_TryAgain condition.
*
* struct bpf_hdr {
* struct BPF_TIMEVAL bh_tstamp; // time stamp
* bpf_u_int32 bh_caplen; // length of captured portion
* bpf_u_int32 bh_datalen; // original length of packet
* u_short bh_hdrlen; // length of bpf header (this struct plus alignment padding)
* }
*
* @param [in] ether An allocated Darwin ethernet.
* @param [in] readbuffer A user-provided read buffer.
*
* @retval ReadWorkBufferResult_Ok A frame was moved from workbuffer to readbuffer
* @retval ReadWorkBufferResult_Empty There's not enough bytes in the workbuffer
* @retval ReadWorkBufferResult_TryAgain (likely discard) caused this call to fail, but you should try again
*
* Example:
* @code
* <#example#>
* @endcode
*/
static _ReadWorkBufferResult
_darwinEthernet_ReadWorkBuffer(MetisGenericEther *ether, PARCEventBuffer *readbuffer)
{
_ReadWorkBufferResult result = ReadWorkBufferResult_Empty;
// Make sure we have linear memory for the BPF header
struct bpf_hdr *bpfHeader = (struct bpf_hdr *) parcEventBuffer_Pullup(ether->workBuffer, sizeof(struct bpf_hdr));
// make sure we have enough bytes to process the frame
// bpfHeader may be NULL if there are not sizeof(struct bpf_hdr) bytes available.
if (bpfHeader && parcEventBuffer_GetLength(ether->workBuffer) >= bpfHeader->bh_hdrlen + bpfHeader->bh_caplen) {
// (0) Save the needed fields from the bpf header
// (1) pop off the bpf header
// (2) move the iovec from work buffer to readBuffer.
// (3) remove any BPF_WORDALIGN padding to the start of the next packet
// (0) Save the needed fields from the bpf header
uint16_t hdrlen = bpfHeader->bh_hdrlen;
uint32_t caplen = bpfHeader->bh_caplen;
// (1) pop off the bpf header
parcEventBuffer_Read(ether->workBuffer, NULL, hdrlen);
// (1a) Determine the packet length from the fixed header and only transfer that many bytes
uint16_t packetlen = _getFrameLengthFromWorkBuffer(ether);
if (packetlen <= caplen) {
// (2) move the iovec from work buffer to readBuffer.
parcEventBuffer_ReadIntoBuffer(ether->workBuffer, readbuffer, packetlen);
// (2a) drain off any trailer (i.e. FCS)
parcEventBuffer_Read(ether->workBuffer, NULL, caplen - packetlen);
result = ReadWorkBufferResult_Ok;
} else {
if (metisLogger_IsLoggable(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Warning)) {
metisLogger_Log(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Warning, __func__,
"%s reading fd %d discard packetlen %u greater than caplen %u",
__func__, ether->etherSocket, packetlen, caplen);
}
// discard all of caplen
parcEventBuffer_Read(ether->workBuffer, NULL, caplen);
// tell the caller that this read failed, but they could try again.
result = ReadWorkBufferResult_TryAgain;
}
// (3) remove any BPF_WORDALIGN padding to the start of the next packet
size_t alignedLength = BPF_WORDALIGN(hdrlen + caplen);
size_t pad = alignedLength - hdrlen - caplen;
parcEventBuffer_Read(ether->workBuffer, NULL, pad);
}
return result;
}
void
metisTlvSkeleton_SetFragmentPayload(MetisTlvSkeleton *opaque, size_t offset, size_t length)
{
_InternalSkeleton *skeleton = (_InternalSkeleton *) opaque;
skeleton->array[INDEX_FRAGMENTPAYLOAD].offset = offset;
skeleton->array[INDEX_FRAGMENTPAYLOAD].length = length;
if (metisLogger_IsLoggable(skeleton->logger, MetisLoggerFacility_Message, PARCLogLevel_Debug)) {
metisLogger_Log(skeleton->logger, MetisLoggerFacility_Message, PARCLogLevel_Debug, __func__,
"Set fragment payload extent {%u, %u}", offset, length);
}
}
void
metisTlvSkeleton_SetCPI(MetisTlvSkeleton *opaque, size_t offset, size_t length)
{
_InternalSkeleton *skeleton = (_InternalSkeleton *) opaque;
skeleton->array[INDEX_CPI].offset = offset;
skeleton->array[INDEX_CPI].length = length;
if (metisLogger_IsLoggable(skeleton->logger, MetisLoggerFacility_Message, PARCLogLevel_Debug)) {
metisLogger_Log(skeleton->logger, MetisLoggerFacility_Message, PARCLogLevel_Debug, __func__,
"Set cpi extent {%u, %u}", offset, length);
}
}
/**
* @function single_read
* @abstract Read at most 1 message from the network
* @discussion
* If a complete message is ready on the input buffer, will allocate and return it.
*
* This function manipulates the stream->nextMessageLength. (1) Initializes with nextMessageLength = 0,
* which means we have not started parsing a packet. (2) After reading a FixedHeader, set nextMessageLength
* to the total length of the message. (3) After reading nextMessageLength bytes, return the outputBuffer
* and reset nextMessageLength to 0.
*
* @param input is the PARCEventBuffer to read
* @param stream is the related stream state for the input
* @return true if there's more to read after this message.
*/
static MetisMessage *
_single_read(PARCEventBuffer *input, _MetisStreamState *stream)
{
size_t bytesAvailable = parcEventBuffer_GetLength(input);
assertTrue(bytesAvailable >= metisTlv_FixedHeaderLength(), "Called with too short an input: %zu", bytesAvailable);
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug)) {
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug, __func__,
"connid %u read %zu bytes",
stream->id, bytesAvailable);
}
if (stream->nextMessageLength == 0) {
_startNewMessage(stream, input, bytesAvailable);
}
// This is not an ELSE statement. We can both start a new message then
// check if there's enough bytes to read the whole thing.
if (bytesAvailable >= stream->nextMessageLength) {
MetisMessage *message = _readMessage(stream, metisForwarder_GetTicks(stream->metis), input);
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug)) {
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug, __func__,
"connid %u msg_length %zu read_length %zu, resetting parser",
stream->id,
stream->nextMessageLength,
bytesAvailable);
}
// now reset message length for next packet
stream->nextMessageLength = 0;
return message;
}
return NULL;
}
static void
_metisStandardPIT_RemoveInterest(MetisPIT *generic, const MetisMessage *interestMessage)
{
assertNotNull(generic, "Parameter pit must be non-null");
assertNotNull(interestMessage, "Parameter interestMessage must be non-null");
MetisStandardPIT *pit = metisPIT_Closure(generic);
if (metisLogger_IsLoggable(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"Message %p removed from PIT",
(void *) interestMessage);
}
metisMatchingRulesTable_RemoveFromBest(pit->table, interestMessage);
}
MetisIoOperations *
metisStreamConnection_OpenConnection(MetisForwarder *metis, MetisAddressPair *pair, bool isLocal)
{
assertNotNull(metis, "Parameter metis must be non-null");
assertNotNull(pair, "Parameter pair must be non-null");
// if there's an error on the bind or connect, will return NULL
PARCEventQueue *bufferEventVector = metisDispatcher_StreamBufferConnect(metisForwarder_GetDispatcher(metis), pair);
if (bufferEventVector == NULL) {
// error opening connection
return NULL;
}
_MetisStreamState *stream = parcMemory_AllocateAndClear(sizeof(_MetisStreamState));
assertNotNull(stream, "parcMemory_AllocateAndClear(%zu) returned NULL", sizeof(_MetisStreamState));
stream->metis = metis;
stream->logger = metisLogger_Acquire(metisForwarder_GetLogger(metis));
stream->fd = parcEventQueue_GetFileDescriptor(bufferEventVector);
stream->bufferEventVector = bufferEventVector;
stream->id = metisForwarder_GetNextConnectionId(metis);
stream->addressPair = pair;
stream->isClosed = false;
// allocate a connection
MetisIoOperations *io_ops = parcMemory_AllocateAndClear(sizeof(MetisIoOperations));
assertNotNull(io_ops, "parcMemory_AllocateAndClear(%zu) returned NULL", sizeof(MetisIoOperations));
memcpy(io_ops, &_template, sizeof(MetisIoOperations));
io_ops->closure = stream;
parcEventQueue_SetCallbacks(stream->bufferEventVector, _conn_readcb, NULL, _conn_eventcb, (void *) io_ops);
parcEventQueue_Enable(stream->bufferEventVector, PARCEventType_Read);
// we start in DOWN state, until remote side answers
metisMessenger_Send(metisForwarder_GetMessenger(stream->metis), metisMissive_Create(MetisMissiveType_ConnectionCreate, stream->id));
_setConnectionState(stream, false);
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Info)) {
char *pair_str = metisAddressPair_ToString(pair);
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Info, __func__,
"StreamConnection %p connect for address pair %s", (void *) stream, pair_str);
free(pair_str);
}
return io_ops;
}
static void
_metisStandardPIT_Destroy(MetisPIT **pitPtr)
{
assertNotNull(pitPtr, "Parameter must be non-null double pointer");
assertNotNull(*pitPtr, "Parameter must dereference to non-null pointer");
MetisStandardPIT *pit = metisPIT_Closure(*pitPtr);
if (metisLogger_IsLoggable(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"PIT %p destroyed",
(void *) pit);
}
metisMatchingRulesTable_Destroy(&pit->table);
metisLogger_Release(&pit->logger);
parcMemory_Deallocate(pitPtr);
}
bool
metisTlvSkeleton_UpdateHopLimit(MetisTlvSkeleton *opaque, uint8_t hoplimit)
{
_InternalSkeleton *skeleton = (_InternalSkeleton *) opaque;
bool updated = false;
if (!metisTlvExtent_Equals(&skeleton->array[INDEX_HOPLIMIT], &metisTlvExtent_NotFound)) {
if (skeleton->array[INDEX_HOPLIMIT].length == 1) {
updated = true;
uint8_t *value = skeleton->packet + skeleton->array[INDEX_HOPLIMIT].offset;
*value = hoplimit;
if (metisLogger_IsLoggable(skeleton->logger, MetisLoggerFacility_Message, PARCLogLevel_Debug)) {
metisLogger_Log(skeleton->logger, MetisLoggerFacility_Message, PARCLogLevel_Debug, __func__,
"set hoplimit %u", hoplimit);
}
}
}
return updated;
}
MetisContentStoreInterface *
metisLRUContentStore_Create(MetisContentStoreConfig *config, MetisLogger *logger)
{
MetisContentStoreInterface *storeImpl = NULL;
assertNotNull(logger, "MetisLRUContentStore requires a non-NULL logger");
storeImpl = parcObject_CreateAndClearInstance(MetisContentStoreInterface);
if (storeImpl != NULL) {
storeImpl->_privateData = parcObject_CreateAndClearInstance(_MetisLRUContentStore);
if (_metisLRUContentStore_Init(storeImpl->_privateData, config, logger)) {
storeImpl->putContent = &_metisLRUContentStore_PutContent;
storeImpl->removeContent = &_metisLRUContentStore_RemoveContent;
storeImpl->matchInterest = &_metisLRUContentStore_MatchInterest;
storeImpl->getObjectCount = &_metisLRUContentStore_GetObjectCount;
storeImpl->getObjectCapacity = &_metisLRUContentStore_GetObjectCapacity;
storeImpl->log = &_metisLRUContentStore_Log;
storeImpl->acquire = &_metisLRUContentStore_Acquire;
storeImpl->release = &_metisLRUContentStore_Release;
// Initialize from the config passed to us.
_metisLRUContentStore_SetObjectCapacity(storeImpl, config->objectCapacity);
if (metisLogger_IsLoggable(logger, MetisLoggerFacility_Processor, PARCLogLevel_Info)) {
metisLogger_Log(logger, MetisLoggerFacility_Processor, PARCLogLevel_Info, __func__,
"LRUContentStore %p created with capacity %zu",
(void *) storeImpl, metisContentStoreInterface_GetObjectCapacity(storeImpl));
}
}
} else {
parcObject_Release((void **) &storeImpl);
}
return storeImpl;
}
/*
* Reading a BPF packet will include the BPF header. Frame may include the FCS.
*/
bool
metisGenericEther_ReadNextFrame(MetisGenericEther *ether, PARCEventBuffer *readbuffer)
{
assertNotNull(ether, "Parameter ether must be non-null");
assertNotNull(readbuffer, "Parameter readbuffer must be non-null");
bool success = false;
if (metisLogger_IsLoggable(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug)) {
metisLogger_Log(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug, __func__,
"Workbuffer length %zu", __func__, parcEventBuffer_GetLength(ether->workBuffer));
}
// Do we already have something in our work buffer? If not, try to read something.
if (parcEventBuffer_GetLength(ether->workBuffer) == 0) {
_darwinEthernet_ReadSocket(ether);
}
success = _darwinEthernet_WorkBufferToReadBuffer(ether, readbuffer);
return success;
}
static void
_metisGenericEther_Destroy(MetisGenericEther **etherPtr)
{
MetisGenericEther *ether = *etherPtr;
if (metisLogger_IsLoggable(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug)) {
metisLogger_Log(ether->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug, __func__,
"GenericEther %p destroyed", (void *) ether);
}
if (ether->etherSocket > 0) {
close(ether->etherSocket);
}
if (ether->macAddress) {
parcBuffer_Release(ðer->macAddress);
}
metisLogger_Release(ðer->logger);
parcEventBuffer_Destroy(ðer->workBuffer);
}
static void
_metisPIT_StoreInTable(MetisStandardPIT *pit, MetisMessage *interestMessage)
{
MetisMessage *key = metisMessage_Acquire(interestMessage);
MetisTicks expiryTime = _metisPIT_CalculateLifetime(pit, interestMessage);
MetisPitEntry *pitEntry = metisPitEntry_Create(key, expiryTime);
// this is done in metisPitEntry_Create
// metisPitEntry_AddIngressId(pitEntry, metisMessage_GetIngressConnectionId(interestMessage));
metisMatchingRulesTable_AddToBestTable(pit->table, key, pitEntry);
if (metisLogger_IsLoggable(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(pit->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"Message %p added to PIT (expiry %" PRIu64 ") ingress %u",
(void *) interestMessage,
metisPitEntry_GetExpiryTime(pitEntry),
metisMessage_GetIngressConnectionId(interestMessage));
}
}
MetisIoOperations *
metisStreamConnection_AcceptConnection(MetisForwarder *metis, int fd, MetisAddressPair *pair, bool isLocal)
{
_MetisStreamState *stream = parcMemory_AllocateAndClear(sizeof(_MetisStreamState));
assertNotNull(stream, "parcMemory_AllocateAndClear(%zu) returned NULL", sizeof(_MetisStreamState));
MetisDispatcher *dispatcher = metisForwarder_GetDispatcher(metis);
PARCEventScheduler *eventBase = metisDispatcher_GetEventScheduler(dispatcher);
stream->bufferEventVector = parcEventQueue_Create(eventBase, fd, PARCEventQueueOption_CloseOnFree | PARCEventQueueOption_DeferCallbacks);
stream->metis = metis;
stream->logger = metisLogger_Acquire(metisForwarder_GetLogger(metis));
stream->fd = fd;
stream->id = metisForwarder_GetNextConnectionId(metis);
stream->addressPair = pair;
stream->isClosed = false;
// allocate a connection
MetisIoOperations *io_ops = parcMemory_AllocateAndClear(sizeof(MetisIoOperations));
assertNotNull(io_ops, "parcMemory_AllocateAndClear(%zu) returned NULL", sizeof(MetisIoOperations));
memcpy(io_ops, &_template, sizeof(MetisIoOperations));
io_ops->closure = stream;
parcEventQueue_SetCallbacks(stream->bufferEventVector, _conn_readcb, NULL, _conn_eventcb, (void *) io_ops);
parcEventQueue_Enable(stream->bufferEventVector, PARCEventType_Read);
metisMessenger_Send(metisForwarder_GetMessenger(stream->metis), metisMissive_Create(MetisMissiveType_ConnectionCreate, stream->id));
// As we are acceting a connection, we begin in the UP state
_setConnectionState(stream, true);
if (metisLogger_IsLoggable(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug)) {
char *pair_str = metisAddressPair_ToString(pair);
metisLogger_Log(stream->logger, MetisLoggerFacility_IO, PARCLogLevel_Debug, __func__,
"StreamConnection %p accept for address pair %s", (void *) stream, pair_str);
free(pair_str);
}
return io_ops;
}
static void
_logProcessCreateTunnelMessage(MetisConfiguration *config, CPIInterfaceIPTunnel *iptun, PARCLogLevel logLevel, const char *message)
{
if (metisLogger_IsLoggable(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Info)) {
const CPIAddress *source = cpiInterfaceIPTunnel_GetSourceAddress(iptun);
const CPIAddress *destination = cpiInterfaceIPTunnel_GetDestinationAddress(iptun);
const char *symbolicName = cpiInterfaceIPTunnel_GetSymbolicName(iptun);
char *sourceString = cpiAddress_ToString(source);
char *remoteString = cpiAddress_ToString(destination);
metisLogger_Log(config->logger, MetisLoggerFacility_Config, PARCLogLevel_Info, __func__,
"Add connection %s on %s to %s: %s",
symbolicName,
sourceString,
remoteString,
message);
parcMemory_Deallocate((void **) &sourceString);
parcMemory_Deallocate((void **) &remoteString);
}
}
static bool
_metisLRUContentStore_RemoveLeastUsed(_MetisLRUContentStore *store)
{
bool result = false;
if (store->objectCount > 0) {
MetisLruListEntry *lruEntry = metisLruList_PopTail(store->lru);
MetisContentStoreEntry *storeEntry =
(MetisContentStoreEntry *) metisLruList_EntryGetData(lruEntry);
if (metisLogger_IsLoggable(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug)) {
metisLogger_Log(store->logger, MetisLoggerFacility_Processor, PARCLogLevel_Debug, __func__,
"ContentStore %p evict message %p by LRU (LRU evictions %" PRIu64 ")",
(void *) store, (void *) metisContentStoreEntry_GetMessage(storeEntry),
store->stats.countLruEvictions);
}
_metisLRUContentStore_PurgeStoreEntry(store, storeEntry);
result = true;
}
return result;
}