/*
* Decode the DMP header. If data is null we're expected to use the last
* header we got.
* @param headers the HeaderSet to add to
* @param data a pointer to the data
* @param length length of the data
* @returns true if successful, false otherwise
*/
bool DMPInflator::DecodeHeader(HeaderSet &headers,
const uint8_t *data,
unsigned int length,
unsigned int &bytes_used) {
if (data) {
// the header bit was set, decode it
if (length >= DMPHeader::DMP_HEADER_SIZE) {
DMPHeader header(*data);
m_last_header = header;
m_last_header_valid = true;
headers.SetDMPHeader(header);
bytes_used = DMPHeader::DMP_HEADER_SIZE;
return true;
}
bytes_used = 0;
return false;
}
// use the last header if it exists
bytes_used = 0;
if (!m_last_header_valid) {
OLA_WARN << "Missing DMP Header data";
return false;
}
headers.SetDMPHeader(m_last_header);
return true;
}
/**
* Tries to construct an HTTP request object from the given string.
* @return Returns the object representing the request on success, or NULL if
* the string could not be parsed. If set, consumed will be filled with
* the amount of data that was consumed from the string to parse the request.
*/
Request* Request::fromString(const string &str, unsigned int *consumed)
{
unsigned int cons = 0;
//Parse the first line which consists of the request type.
size_t firstCRLF = str.find("\r\n");
if (firstCRLF == string::npos) return NULL;
string firstLine = str.substr(0, firstCRLF);
cons = firstCRLF + 2;
size_t methodPos = firstLine.find(" ");
if (methodPos == string::npos) return NULL;
string method = firstLine.substr(0, methodPos);
Type type;
if (method == "GET") type = kGET;
else if (method == "POST") type = kPOST;
else if (method == "DELETE") type = kDELETE;
else if (method == "PUT") type = kPUT;
else {
throw new GenericError(string("Received HTTP request with unknown method '") + method + "'.");
}
size_t pathPos = firstLine.find(" ", methodPos + 1);
if (pathPos == string::npos) return NULL;
string path = firstLine.substr(methodPos + 1, pathPos - methodPos - 1);
//Parse the header.
unsigned int hsConsumed = 0;
HeaderSet *hs = HeaderSet::fromString(str.substr(firstCRLF + 2), &hsConsumed);
cons += hsConsumed;
if (!hs) return NULL;
//Read the content.
int expectedLength = 0;
if (hs->has("Content-Length")) {
expectedLength = atoi(hs->get("Content-Length").c_str());
if (expectedLength > str.size() - cons) {
return NULL;
}
}
//Create the request object.
Request *req = new Request;
req->type = type;
req->path = path;
req->headers = *hs;
req->content = str.substr(cons, expectedLength);
cons += expectedLength;
if (consumed) *consumed = cons;
return req;
}
/*
* Handle a E1.33 Status PDU.
*/
bool E133StatusInflator::HandlePDUData(uint32_t vector,
const HeaderSet &headers,
const uint8_t *data,
unsigned int pdu_len) {
unsigned int size = std::min(
pdu_len,
static_cast<unsigned int>(ola::e133::MAX_E133_STATUS_STRING_SIZE));
string description(reinterpret_cast<const char*>(&data[0]), size);
m_handler->Run(&headers.GetTransportHeader(),
&headers.GetE133Header(),
static_cast<uint16_t>(vector),
description);
return true;
}
/*
* Handle a DMP PDU for E1.33.
*/
bool RDMInflator::HandlePDUData(uint32_t vector,
const HeaderSet &headers,
const uint8_t *data,
unsigned int pdu_len) {
if (vector != VECTOR_RDMNET_DATA) {
OLA_INFO << "Not a RDM message, vector was " << vector;
return true;
}
string rdm_message(reinterpret_cast<const char*>(&data[0]), pdu_len);
E133Header e133_header = headers.GetE133Header();
if (m_rdm_handler.get()) {
m_rdm_handler->Run(&headers.GetTransportHeader(), &e133_header,
rdm_message);
} else {
OLA_WARN << "No RDM handler defined!";
}
return true;
}
/*
* Check that the header set works
*/
void HeaderSetTest::testHeaderSet() {
HeaderSet headers;
RootHeader root_header;
E131Header e131_header("e131", 1, 2, 6001);
E133Header e133_header("foo", 1, 2050);
DMPHeader dmp_header(false, false, NON_RANGE, ONE_BYTES);
// test the root header component
CID cid = CID::Generate();
root_header.SetCid(cid);
headers.SetRootHeader(root_header);
OLA_ASSERT(root_header == headers.GetRootHeader());
// test the E1.31 header component
headers.SetE131Header(e131_header);
OLA_ASSERT(e131_header == headers.GetE131Header());
// test the E1.33 header component
headers.SetE133Header(e133_header);
OLA_ASSERT(e133_header == headers.GetE133Header());
// test the DMP headers component
headers.SetDMPHeader(dmp_header);
OLA_ASSERT(dmp_header == headers.GetDMPHeader());
// test assign
HeaderSet headers2 = headers;
OLA_ASSERT(root_header == headers2.GetRootHeader());
OLA_ASSERT(e131_header == headers2.GetE131Header());
OLA_ASSERT(e133_header == headers2.GetE133Header());
OLA_ASSERT(dmp_header == headers2.GetDMPHeader());
OLA_ASSERT(headers2 == headers);
// test copy
HeaderSet headers3(headers);
OLA_ASSERT(root_header == headers3.GetRootHeader());
OLA_ASSERT(e131_header == headers3.GetE131Header());
OLA_ASSERT(e133_header == headers3.GetE133Header());
OLA_ASSERT(dmp_header == headers3.GetDMPHeader());
OLA_ASSERT(headers3 == headers);
}
/*
* Verify a PDU is what we expected
*/
bool MockDMPInflator::HandlePDUData(uint32_t vector,
HeaderSet &headers,
const uint8_t *data,
unsigned int pdu_len) {
DMPHeader header = headers.GetDMPHeader();
CPPUNIT_ASSERT_EQUAL(expected_vector, vector);
CPPUNIT_ASSERT_EQUAL(expected_virtual, header.IsVirtual());
CPPUNIT_ASSERT_EQUAL(expected_relative, header.IsRelative());
CPPUNIT_ASSERT(expected_type == header.Type());
CPPUNIT_ASSERT(expected_size == header.Size());
if (vector == DMP_GET_PROPERTY_VECTOR ||
vector == DMP_SET_PROPERTY_VECTOR) {
unsigned int length = pdu_len;
const BaseDMPAddress *addr = DecodeAddress(header.Size(), header.Type(),
data, length);
CPPUNIT_ASSERT(addr);
CPPUNIT_ASSERT_EQUAL(expected_start, addr->Start());
CPPUNIT_ASSERT_EQUAL(expected_increment, addr->Increment());
CPPUNIT_ASSERT_EQUAL(expected_number, addr->Number());
delete addr;
}
return true;
}
/*
* Handle a DMP PDU for E1.31.
*/
bool DMPE131Inflator::HandlePDUData(uint32_t vector,
const HeaderSet &headers,
const uint8_t *data,
unsigned int pdu_len) {
if (vector != ola::acn::DMP_SET_PROPERTY_VECTOR) {
OLA_INFO << "not a set property msg: " << vector;
return true;
}
E131Header e131_header = headers.GetE131Header();
UniverseHandlers::iterator universe_iter =
m_handlers.find(e131_header.Universe());
if (e131_header.PreviewData() && m_ignore_preview) {
OLA_DEBUG << "Ignoring preview data";
return true;
}
if (universe_iter == m_handlers.end())
return true;
DMPHeader dmp_header = headers.GetDMPHeader();
if (!dmp_header.IsVirtual() || dmp_header.IsRelative() ||
dmp_header.Size() != TWO_BYTES ||
dmp_header.Type() != RANGE_EQUAL) {
OLA_INFO << "malformed E1.31 dmp header " << dmp_header.Header();
return true;
}
if (e131_header.Priority() > MAX_PRIORITY) {
OLA_INFO << "Priority " << static_cast<int>(e131_header.Priority()) <<
" is greater than the max priority (" << static_cast<int>(MAX_PRIORITY) <<
"), ignoring data";
return true;
}
unsigned int available_length = pdu_len;
std::auto_ptr<const BaseDMPAddress> address(
DecodeAddress(dmp_header.Size(),
dmp_header.Type(),
data,
&available_length));
if (!address.get()) {
OLA_INFO << "DMP address parsing failed, the length is probably too small";
return true;
}
if (address->Increment() != 1) {
OLA_INFO << "E1.31 DMP packet with increment " << address->Increment()
<< ", disarding";
return true;
}
unsigned int length_remaining = pdu_len - available_length;
int start_code = -1;
if (e131_header.UsingRev2())
start_code = static_cast<int>(address->Start());
else if (length_remaining && address->Number())
start_code = *(data + available_length);
// The only time we want to continue processing a non-0 start code is if it
// contains a Terminate message.
if (start_code && !e131_header.StreamTerminated()) {
OLA_INFO << "Skipping packet with non-0 start code: " << start_code;
return true;
}
DmxBuffer *target_buffer;
if (!TrackSourceIfRequired(&universe_iter->second, headers,
&target_buffer)) {
// no need to continue processing
return true;
}
// Reaching here means that we actually have new data and we should merge.
if (target_buffer && start_code == 0) {
unsigned int channels = std::min(length_remaining, address->Number());
if (e131_header.UsingRev2())
target_buffer->Set(data + available_length, channels);
else
target_buffer->Set(data + available_length + 1, channels - 1);
}
if (universe_iter->second.priority)
*universe_iter->second.priority = universe_iter->second.active_priority;
// merge the sources
switch (universe_iter->second.sources.size()) {
case 0:
universe_iter->second.buffer->Reset();
break;
case 1:
universe_iter->second.buffer->Set(
universe_iter->second.sources[0].buffer);
universe_iter->second.closure->Run();
break;
default:
// HTP Merge
universe_iter->second.buffer->Reset();
std::vector<dmx_source>::const_iterator source_iter =
universe_iter->second.sources.begin();
for (; source_iter != universe_iter->second.sources.end(); ++source_iter)
universe_iter->second.buffer->HTPMerge(source_iter->buffer);
universe_iter->second.closure->Run();
}
return true;
}
/*
* Check if this source is operating at the highest priority for this universe.
* This takes care of tracking all sources for a universe at the active
* priority.
* @param universe_data the universe_handler struct for this universe,
* @param HeaderSet the set of headers in this packet
* @param buffer, if set to a non-NULL pointer, the caller should copy the data
* in the buffer.
* @returns true if we should remerge the data, false otherwise.
*/
bool DMPE131Inflator::TrackSourceIfRequired(
universe_handler *universe_data,
const HeaderSet &headers,
DmxBuffer **buffer) {
*buffer = NULL; // default the buffer to NULL
ola::TimeStamp now;
m_clock.CurrentTime(&now);
const E131Header &e131_header = headers.GetE131Header();
uint8_t priority = e131_header.Priority();
vector<dmx_source> &sources = universe_data->sources;
vector<dmx_source>::iterator iter = sources.begin();
while (iter != sources.end()) {
if (iter->cid != headers.GetRootHeader().GetCid()) {
TimeStamp expiry_time = iter->last_heard_from + EXPIRY_INTERVAL;
if (now > expiry_time) {
OLA_INFO << "source " << iter->cid.ToString() << " has expired";
iter = sources.erase(iter);
continue;
}
}
iter++;
}
if (sources.empty())
universe_data->active_priority = 0;
for (iter = sources.begin(); iter != sources.end(); ++iter) {
if (iter->cid == headers.GetRootHeader().GetCid())
break;
}
if (iter == sources.end()) {
// This is an untracked source
if (e131_header.StreamTerminated() ||
priority < universe_data->active_priority)
return false;
if (priority > universe_data->active_priority) {
OLA_INFO << "Raising priority for universe " <<
e131_header.Universe() << " from " <<
static_cast<int>(universe_data->active_priority) << " to " <<
static_cast<int>(priority);
sources.clear();
universe_data->active_priority = priority;
}
if (sources.size() == MAX_MERGE_SOURCES) {
// TODO(simon): flag this in the export map
OLA_WARN << "Max merge sources reached for universe " <<
e131_header.Universe() << ", " <<
headers.GetRootHeader().GetCid().ToString() << " won't be tracked";
return false;
} else {
OLA_INFO << "Added new E1.31 source: " <<
headers.GetRootHeader().GetCid().ToString();
dmx_source new_source;
new_source.cid = headers.GetRootHeader().GetCid();
new_source.sequence = e131_header.Sequence();
new_source.last_heard_from = now;
iter = sources.insert(sources.end(), new_source);
*buffer = &iter->buffer;
return true;
}
} else {
// We already know about this one, check the seq #
int8_t seq_diff = static_cast<int8_t>(e131_header.Sequence() -
iter->sequence);
if (seq_diff <= 0 && seq_diff > SEQUENCE_DIFF_THRESHOLD) {
OLA_INFO << "Old packet received, ignoring, this # " <<
static_cast<int>(e131_header.Sequence()) << ", last " <<
static_cast<int>(iter->sequence);
return false;
}
iter->sequence = e131_header.Sequence();
if (e131_header.StreamTerminated()) {
OLA_INFO << "CID " << headers.GetRootHeader().GetCid().ToString() <<
" sent a termination for universe " << e131_header.Universe();
sources.erase(iter);
if (sources.empty())
universe_data->active_priority = 0;
// We need to trigger a merge here else the buffer will be stale, we keep
// the buffer as NULL though so we don't use the data.
return true;
}
iter->last_heard_from = now;
if (priority < universe_data->active_priority) {
if (sources.size() == 1) {
universe_data->active_priority = priority;
} else {
sources.erase(iter);
return true;
}
} else if (priority > universe_data->active_priority) {
// new active priority
universe_data->active_priority = priority;
if (sources.size() != 1) {
// clear all sources other than this one
dmx_source this_source = *iter;
sources.clear();
iter = sources.insert(sources.end(), this_source);
}
}
*buffer = &iter->buffer;
return true;
}
}
/**
* This runs the on_data callback if we have one
*/
bool RootInflator::PostHeader(uint32_t, const HeaderSet &headers) {
if (m_on_data.get())
m_on_data->Run(headers.GetTransportHeader());
return true;
}
