mirror of
https://github.com/zeromq/libzmq.git
synced 2024-12-14 19:13:52 +01:00
729 lines
26 KiB
C++
729 lines
26 KiB
C++
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#include "platform.hpp"
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#if defined ZMQ_HAVE_NORM
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#include "norm_engine.hpp"
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#include "session_base.hpp"
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#include "v2_protocol.hpp"
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zmq::norm_engine_t::norm_engine_t(io_thread_t* parent_,
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const options_t& options_)
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: io_object_t(parent_), zmq_session(NULL), options(options_),
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norm_instance(NORM_INSTANCE_INVALID), norm_session(NORM_SESSION_INVALID),
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is_sender(false), is_receiver(false),
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zmq_encoder(0), norm_tx_stream(NORM_OBJECT_INVALID),
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tx_first_msg(true), tx_more_bit(false),
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zmq_output_ready(false), norm_tx_ready(false),
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tx_index(0), tx_len(0),
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zmq_input_ready(false)
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{
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int rc = tx_msg.init();
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errno_assert(0 == rc);
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}
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zmq::norm_engine_t::~norm_engine_t()
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{
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shutdown(); // in case it was not already called
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}
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int zmq::norm_engine_t::init(const char* network_, bool send, bool recv)
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{
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// Parse the "network_" address int "iface", "addr", and "port"
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// norm endpoint format: [id,][<iface>;]<addr>:<port>
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// First, look for optional local NormNodeId
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// (default NORM_NODE_ANY causes NORM to use host IP addr for NormNodeId)
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NormNodeId localId = NORM_NODE_ANY;
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const char* ifacePtr = strchr(network_, ',');
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if (NULL != ifacePtr)
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{
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size_t idLen = ifacePtr - network_;
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if (idLen > 31) idLen = 31;
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char idText[32];
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strncpy(idText, network_, idLen);
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idText[idLen] = '\0';
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localId = (NormNodeId)atoi(idText);
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ifacePtr++;
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}
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else
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{
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ifacePtr = network_;
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}
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// Second, look for optional multicast ifaceName
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char ifaceName[256];
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const char* addrPtr = strchr(ifacePtr, ';');
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if (NULL != addrPtr)
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{
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size_t ifaceLen = addrPtr - ifacePtr;
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if (ifaceLen > 255) ifaceLen = 255; // return error instead?
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strncpy(ifaceName, ifacePtr, ifaceLen);
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ifaceName[ifaceLen] = '\0';
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ifacePtr = ifaceName;
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addrPtr++;
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}
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else
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{
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addrPtr = ifacePtr;
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ifacePtr = NULL;
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}
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// Finally, parse IP address and port number
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const char* portPtr = strrchr(addrPtr, ':');
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if (NULL == portPtr)
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{
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errno = EINVAL;
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return -1;
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}
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char addr[256];
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size_t addrLen = portPtr - addrPtr;
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if (addrLen > 255) addrLen = 255;
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strncpy(addr, addrPtr, addrLen);
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addr[addrLen] = '\0';
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portPtr++;
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unsigned short portNumber = atoi(portPtr);
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if (NORM_INSTANCE_INVALID == norm_instance)
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{
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if (NORM_INSTANCE_INVALID == (norm_instance = NormCreateInstance()))
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{
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// errno set by whatever caused NormCreateInstance() to fail
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return -1;
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}
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}
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// TBD - What do we use for our local NormNodeId?
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// (for now we use automatic, IP addr based assignment or passed in 'id')
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// a) Use ZMQ Identity somehow?
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// b) Add function to use iface addr
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// c) Randomize and implement a NORM session layer
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// conflict detection/resolution protocol
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norm_session = NormCreateSession(norm_instance, addr, portNumber, localId);
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if (NORM_SESSION_INVALID == norm_session)
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{
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int savedErrno = errno;
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NormDestroyInstance(norm_instance);
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norm_instance = NORM_INSTANCE_INVALID;
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errno = savedErrno;
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return -1;
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}
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// There's many other useful NORM options that could be applied here
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if (NormIsUnicastAddress(addr))
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{
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NormSetDefaultUnicastNack(norm_session, true);
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}
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else
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{
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// These only apply for multicast sessions
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//NormSetTTL(norm_session, options.multicast_hops); // ZMQ default is 1
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NormSetTTL(norm_session, 255); // since the ZMQ_MULTICAST_HOPS socket option isn't well-supported
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NormSetRxPortReuse(norm_session, true); // port reuse doesn't work for non-connected unicast
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NormSetLoopback(norm_session, true); // needed when multicast users on same machine
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if (NULL != ifacePtr)
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{
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// Note a bad interface may not be caught until sender or receiver start
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// (Since sender/receiver is not yet started, this always succeeds here)
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NormSetMulticastInterface(norm_session, ifacePtr);
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}
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}
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if (recv)
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{
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// The alternative NORM_SYNC_CURRENT here would provide "instant"
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// receiver sync to the sender's _current_ message transmission.
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// NORM_SYNC_STREAM tries to get everything the sender has cached/buffered
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NormSetDefaultSyncPolicy(norm_session, NORM_SYNC_STREAM);
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if (!NormStartReceiver(norm_session, 2*1024*1024))
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{
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// errno set by whatever failed
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int savedErrno = errno;
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NormDestroyInstance(norm_instance); // session gets closed, too
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norm_session = NORM_SESSION_INVALID;
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norm_instance = NORM_INSTANCE_INVALID;
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errno = savedErrno;
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return -1;
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}
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is_receiver = true;
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}
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if (send)
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{
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// Pick a random sender instance id (aka norm sender session id)
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NormSessionId instanceId = NormGetRandomSessionId();
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// TBD - provide "options" for some NORM sender parameters
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if (!NormStartSender(norm_session, instanceId, 2*1024*1024, 1400, 16, 4))
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{
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// errno set by whatever failed
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int savedErrno = errno;
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NormDestroyInstance(norm_instance); // session gets closed, too
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norm_session = NORM_SESSION_INVALID;
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norm_instance = NORM_INSTANCE_INVALID;
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errno = savedErrno;
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return -1;
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}
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NormSetCongestionControl(norm_session, true);
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norm_tx_ready = true;
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is_sender = true;
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if (NORM_OBJECT_INVALID == (norm_tx_stream = NormStreamOpen(norm_session, 2*1024*1024)))
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{
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// errno set by whatever failed
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int savedErrno = errno;
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NormDestroyInstance(norm_instance); // session gets closed, too
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norm_session = NORM_SESSION_INVALID;
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norm_instance = NORM_INSTANCE_INVALID;
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errno = savedErrno;
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return -1;
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}
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}
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//NormSetMessageTrace(norm_session, true);
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//NormSetDebugLevel(3);
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//NormOpenDebugLog(norm_instance, "normLog.txt");
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return 0; // no error
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} // end zmq::norm_engine_t::init()
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void zmq::norm_engine_t::shutdown()
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{
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// TBD - implement a more graceful shutdown option
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if (is_receiver)
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{
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NormStopReceiver(norm_session);
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// delete any active NormRxStreamState
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rx_pending_list.Destroy();
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rx_ready_list.Destroy();
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msg_ready_list.Destroy();
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is_receiver = false;
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}
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if (is_sender)
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{
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NormStopSender(norm_session);
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is_sender = false;
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}
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if (NORM_SESSION_INVALID != norm_session)
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{
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NormDestroySession(norm_session);
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norm_session = NORM_SESSION_INVALID;
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}
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if (NORM_INSTANCE_INVALID != norm_instance)
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{
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NormStopInstance(norm_instance);
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NormDestroyInstance(norm_instance);
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norm_instance = NORM_INSTANCE_INVALID;
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}
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} // end zmq::norm_engine_t::shutdown()
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void zmq::norm_engine_t::plug (io_thread_t* io_thread_, session_base_t *session_)
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{
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// TBD - we may assign the NORM engine to an io_thread in the future???
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zmq_session = session_;
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if (is_sender) zmq_output_ready = true;
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if (is_receiver) zmq_input_ready = true;
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fd_t normDescriptor = NormGetDescriptor(norm_instance);
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norm_descriptor_handle = add_fd(normDescriptor);
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// Set POLLIN for notification of pending NormEvents
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set_pollin(norm_descriptor_handle);
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if (is_sender) send_data();
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} // end zmq::norm_engine_t::init()
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void zmq::norm_engine_t::unplug()
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{
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rm_fd(norm_descriptor_handle);
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zmq_session = NULL;
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} // end zmq::norm_engine_t::unplug()
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void zmq::norm_engine_t::terminate()
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{
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unplug();
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shutdown();
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delete this;
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}
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void zmq::norm_engine_t::restart_output()
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{
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// There's new message data available from the session
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zmq_output_ready = true;
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if (norm_tx_ready) send_data();
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} // end zmq::norm_engine_t::restart_output()
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void zmq::norm_engine_t::send_data()
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{
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// Here we write as much as is available or we can
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while (zmq_output_ready && norm_tx_ready)
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{
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if (0 == tx_len)
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{
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// Our tx_buffer needs data to send
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// Get more data from encoder
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size_t space = BUFFER_SIZE;
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unsigned char* bufPtr = (unsigned char*)tx_buffer;
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tx_len = zmq_encoder.encode(&bufPtr, space);
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if (0 == tx_len)
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{
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if (tx_first_msg)
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{
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// We don't need to mark eom/flush until a message is sent
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tx_first_msg = false;
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}
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else
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{
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// A prior message was completely written to stream, so
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// mark end-of-message and possibly flush (to force packet transmission,
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// even if it's not a full segment so message gets delivered quickly)
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// NormStreamMarkEom(norm_tx_stream); // the flush below marks eom
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// Note NORM_FLUSH_ACTIVE makes NORM fairly chatty for low duty cycle messaging
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// but makes sure content is delivered quickly. Positive acknowledgements
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// with flush override would make NORM more succinct here
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NormStreamFlush(norm_tx_stream, true, NORM_FLUSH_ACTIVE);
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}
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// Need to pull and load a new message to send
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if (-1 == zmq_session->pull_msg(&tx_msg))
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{
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// We need to wait for "restart_output()" to be called by ZMQ
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zmq_output_ready = false;
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break;
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}
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zmq_encoder.load_msg(&tx_msg);
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// Should we write message size header for NORM to use? Or expect NORM
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// receiver to decode ZMQ message framing format(s)?
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// OK - we need to use a byte to denote when the ZMQ frame is the _first_
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// frame of a message so it can be decoded properly when a receiver
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// 'syncs' mid-stream. We key off the the state of the 'more_flag'
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// I.e.,If more_flag _was_ false previously, this is the first
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// frame of a ZMQ message.
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if (tx_more_bit)
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tx_buffer[0] = (char)0xff; // this is not first frame of message
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else
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tx_buffer[0] = 0x00; // this is first frame of message
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tx_more_bit = (0 != (tx_msg.flags() & msg_t::more));
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// Go ahead an get a first chunk of the message
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bufPtr++;
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space--;
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tx_len = 1 + zmq_encoder.encode(&bufPtr, space);
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tx_index = 0;
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}
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}
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// Do we have data in our tx_buffer pending
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if (tx_index < tx_len)
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{
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// We have data in our tx_buffer to send, so write it to the stream
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tx_index += NormStreamWrite(norm_tx_stream, tx_buffer + tx_index, tx_len - tx_index);
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if (tx_index < tx_len)
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{
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// NORM stream buffer full, wait for NORM_TX_QUEUE_VACANCY
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norm_tx_ready = false;
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break;
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}
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tx_len = 0; // all buffered data was written
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}
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} // end while (zmq_output_ready && norm_tx_ready)
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} // end zmq::norm_engine_t::send_data()
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void zmq::norm_engine_t::in_event()
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{
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// This means a NormEvent is pending, so call NormGetNextEvent() and handle
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NormEvent event;
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if (!NormGetNextEvent(norm_instance, &event))
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{
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// NORM has died before we unplugged?!
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zmq_assert(false);
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return;
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}
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switch(event.type)
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{
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case NORM_TX_QUEUE_VACANCY:
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case NORM_TX_QUEUE_EMPTY:
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if (!norm_tx_ready)
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{
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norm_tx_ready = true;
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send_data();
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}
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break;
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case NORM_RX_OBJECT_NEW:
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//break;
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case NORM_RX_OBJECT_UPDATED:
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recv_data(event.object);
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break;
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case NORM_RX_OBJECT_ABORTED:
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{
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NormRxStreamState* rxState = (NormRxStreamState*)NormObjectGetUserData(event.object);
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if (NULL != rxState)
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{
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// Remove the state from the list it's in
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// This is now unnecessary since deletion takes care of list removal
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// but in the interest of being clear ...
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NormRxStreamState::List* list = rxState->AccessList();
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if (NULL != list) list->Remove(*rxState);
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}
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delete rxState;
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break;
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}
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case NORM_REMOTE_SENDER_INACTIVE:
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// Here we free resources used for this formerly active sender.
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// Note w/ NORM_SYNC_STREAM, if sender reactivates, we may
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// get some messages delivered twice. NORM_SYNC_CURRENT would
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// mitigate that but might miss data at startup. Always tradeoffs.
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// Instead of immediately deleting, we could instead initiate a
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// user configurable timeout here to wait some amount of time
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// after this event to declare the remote sender truly dead
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// and delete its state???
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NormNodeDelete(event.sender);
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break;
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default:
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// We ignore some NORM events
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break;
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}
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} // zmq::norm_engine_t::in_event()
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void zmq::norm_engine_t::restart_input()
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{
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// TBD - should we check/assert that zmq_input_ready was false???
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zmq_input_ready = true;
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// Process any pending received messages
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if (!msg_ready_list.IsEmpty())
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recv_data(NORM_OBJECT_INVALID);
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} // end zmq::norm_engine_t::restart_input()
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void zmq::norm_engine_t::recv_data(NormObjectHandle object)
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{
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if (NORM_OBJECT_INVALID != object)
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{
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// Call result of NORM_RX_OBJECT_UPDATED notification
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// This is a rx_ready indication for a new or existing rx stream
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// First, determine if this is a stream we already know
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zmq_assert(NORM_OBJECT_STREAM == NormObjectGetType(object));
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// Since there can be multiple senders (publishers), we keep
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// state for each separate rx stream.
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NormRxStreamState* rxState = (NormRxStreamState*)NormObjectGetUserData(object);
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if (NULL == rxState)
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{
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// This is a new stream, so create rxState with zmq decoder, etc
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rxState = new NormRxStreamState(object, options.maxmsgsize);
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if (!rxState->Init())
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{
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errno_assert(false);
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delete rxState;
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return;
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}
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NormObjectSetUserData(object, rxState);
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}
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else if (!rxState->IsRxReady())
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{
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// Existing non-ready stream, so remove from pending
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// list to be promoted to rx_ready_list ...
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rx_pending_list.Remove(*rxState);
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}
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if (!rxState->IsRxReady())
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{
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// TBD - prepend up front for immediate service?
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rxState->SetRxReady(true);
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rx_ready_list.Append(*rxState);
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}
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}
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// This loop repeats until we've read all data available from "rx ready" inbound streams
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// and pushed any accumulated messages we can up to the zmq session.
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while (!rx_ready_list.IsEmpty() || (zmq_input_ready && !msg_ready_list.IsEmpty()))
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{
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// Iterate through our rx_ready streams, reading data into the decoder
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// (This services incoming "rx ready" streams in a round-robin fashion)
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NormRxStreamState::List::Iterator iterator(rx_ready_list);
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NormRxStreamState* rxState;
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while (NULL != (rxState = iterator.GetNextItem()))
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{
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switch(rxState->Decode())
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{
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case 1: // msg completed
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// Complete message decoded, move this stream to msg_ready_list
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// to push the message up to the session below. Note the stream
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// will be returned to the "rx_ready_list" after that's done
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rx_ready_list.Remove(*rxState);
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msg_ready_list.Append(*rxState);
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continue;
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case -1: // decoding error (shouldn't happen w/ NORM, but ...)
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// We need to re-sync this stream (decoder buffer was reset)
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rxState->SetSync(false);
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break;
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default: // 0 - need more data
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break;
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}
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// Get more data from this stream
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NormObjectHandle stream = rxState->GetStreamHandle();
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// First, make sure we're in sync ...
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while (!rxState->InSync())
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{
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// seek NORM message start
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if (!NormStreamSeekMsgStart(stream))
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{
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// Need to wait for more data
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break;
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}
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// read message 'flag' byte to see if this it's a 'final' frame
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char syncFlag;
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unsigned int numBytes = 1;
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if (!NormStreamRead(stream, &syncFlag, &numBytes))
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{
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// broken stream (shouldn't happen after seek msg start?)
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zmq_assert(false);
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continue;
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}
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if (0 == numBytes)
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{
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// This probably shouldn't happen either since we found msg start
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// Need to wait for more data
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break;
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}
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if (0 == syncFlag) rxState->SetSync(true);
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// else keep seeking ...
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} // end while(!rxState->InSync())
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if (!rxState->InSync())
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{
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// Need more data for this stream, so remove from "rx ready"
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// list and iterate to next "rx ready" stream
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rxState->SetRxReady(false);
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// Move from rx_ready_list to rx_pending_list
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rx_ready_list.Remove(*rxState);
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rx_pending_list.Append(*rxState);
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continue;
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}
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// Now we're actually ready to read data from the NORM stream to the zmq_decoder
|
|
// the underlying zmq_decoder->get_buffer() call sets how much is needed.
|
|
unsigned int numBytes = rxState->GetBytesNeeded();
|
|
if (!NormStreamRead(stream, rxState->AccessBuffer(), &numBytes))
|
|
{
|
|
// broken NORM stream, so re-sync
|
|
rxState->Init(); // TBD - check result
|
|
// This will retry syncing, and getting data from this stream
|
|
// since we don't increment the "it" iterator
|
|
continue;
|
|
}
|
|
rxState->IncrementBufferCount(numBytes);
|
|
if (0 == numBytes)
|
|
{
|
|
// All the data available has been read
|
|
// Need to wait for NORM_RX_OBJECT_UPDATED for this stream
|
|
rxState->SetRxReady(false);
|
|
// Move from rx_ready_list to rx_pending_list
|
|
rx_ready_list.Remove(*rxState);
|
|
rx_pending_list.Append(*rxState);
|
|
}
|
|
} // end while(NULL != (rxState = iterator.GetNextItem()))
|
|
|
|
if (zmq_input_ready)
|
|
{
|
|
// At this point, we've made a pass through the "rx_ready" stream list
|
|
// Now make a pass through the "msg_pending" list (if the zmq session
|
|
// ready for more input). This may possibly return streams back to
|
|
// the "rx ready" stream list after their pending message is handled
|
|
NormRxStreamState::List::Iterator iterator(msg_ready_list);
|
|
NormRxStreamState* rxState;
|
|
while (NULL != (rxState = iterator.GetNextItem()))
|
|
{
|
|
msg_t* msg = rxState->AccessMsg();
|
|
int rc = zmq_session->push_msg(msg);
|
|
if (-1 == rc)
|
|
{
|
|
if (EAGAIN == errno)
|
|
{
|
|
// need to wait until session calls "restart_input()"
|
|
zmq_input_ready = false;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
// session rejected message?
|
|
// TBD - handle this better
|
|
zmq_assert(false);
|
|
}
|
|
}
|
|
// else message was accepted.
|
|
msg_ready_list.Remove(*rxState);
|
|
if (rxState->IsRxReady()) // Move back to "rx_ready" list to read more data
|
|
rx_ready_list.Append(*rxState);
|
|
else // Move back to "rx_pending" list until NORM_RX_OBJECT_UPDATED
|
|
msg_ready_list.Append(*rxState);
|
|
} // end while(NULL != (rxState = iterator.GetNextItem()))
|
|
} // end if (zmq_input_ready)
|
|
} // end while ((!rx_ready_list.empty() || (zmq_input_ready && !msg_ready_list.empty()))
|
|
|
|
// Alert zmq of the messages we have pushed up
|
|
zmq_session->flush();
|
|
|
|
} // end zmq::norm_engine_t::recv_data()
|
|
|
|
zmq::norm_engine_t::NormRxStreamState::NormRxStreamState(NormObjectHandle normStream,
|
|
int64_t maxMsgSize)
|
|
: norm_stream(normStream), max_msg_size(maxMsgSize),
|
|
in_sync(false), rx_ready(false), zmq_decoder(NULL), skip_norm_sync(false),
|
|
buffer_ptr(NULL), buffer_size(0), buffer_count(0),
|
|
prev(NULL), next(NULL), list(NULL)
|
|
{
|
|
}
|
|
|
|
zmq::norm_engine_t::NormRxStreamState::~NormRxStreamState()
|
|
{
|
|
if (NULL != zmq_decoder)
|
|
{
|
|
delete zmq_decoder;
|
|
zmq_decoder = NULL;
|
|
}
|
|
if (NULL != list)
|
|
{
|
|
list->Remove(*this);
|
|
list = NULL;
|
|
}
|
|
}
|
|
|
|
bool zmq::norm_engine_t::NormRxStreamState::Init()
|
|
{
|
|
in_sync = false;
|
|
skip_norm_sync = false;
|
|
if (NULL != zmq_decoder) delete zmq_decoder;
|
|
// Note "in_batch_size" comes from config.h
|
|
zmq_decoder = new (std::nothrow) v2_decoder_t (in_batch_size, max_msg_size);
|
|
alloc_assert (zmq_decoder);
|
|
if (NULL != zmq_decoder)
|
|
{
|
|
buffer_count = 0;
|
|
buffer_size = 0;
|
|
zmq_decoder->get_buffer(&buffer_ptr, &buffer_size);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
} // end zmq::norm_engine_t::NormRxStreamState::Init()
|
|
|
|
// This decodes any pending data sitting in our stream decoder buffer
|
|
// It returns 1 upon message completion, -1 on error, 1 on msg completion
|
|
int zmq::norm_engine_t::NormRxStreamState::Decode()
|
|
{
|
|
// If we have pending bytes to decode, process those first
|
|
while (buffer_count > 0)
|
|
{
|
|
// There's pending data for the decoder to decode
|
|
size_t processed = 0;
|
|
|
|
// This a bit of a kludgy approach used to weed
|
|
// out the NORM ZMQ message transport "syncFlag" byte
|
|
// from the ZMQ message stream being decoded (but it works!)
|
|
if (skip_norm_sync)
|
|
{
|
|
buffer_ptr++;
|
|
buffer_count--;
|
|
skip_norm_sync = false;
|
|
}
|
|
|
|
int rc = zmq_decoder->decode(buffer_ptr, buffer_count, processed);
|
|
buffer_ptr += processed;
|
|
buffer_count -= processed;
|
|
switch (rc)
|
|
{
|
|
case 1:
|
|
// msg completed
|
|
if (0 == buffer_count)
|
|
{
|
|
buffer_size = 0;
|
|
zmq_decoder->get_buffer(&buffer_ptr, &buffer_size);
|
|
}
|
|
skip_norm_sync = true;
|
|
return 1;
|
|
case -1:
|
|
// decoder error (reset decoder and state variables)
|
|
in_sync = false;
|
|
skip_norm_sync = false; // will get consumed by norm sync check
|
|
Init();
|
|
break;
|
|
|
|
case 0:
|
|
// need more data, keep decoding until buffer exhausted
|
|
break;
|
|
}
|
|
}
|
|
// Reset buffer pointer/count for next read
|
|
buffer_count = 0;
|
|
buffer_size = 0;
|
|
zmq_decoder->get_buffer(&buffer_ptr, &buffer_size);
|
|
return 0; // need more data
|
|
|
|
} // end zmq::norm_engine_t::NormRxStreamState::Decode()
|
|
|
|
zmq::norm_engine_t::NormRxStreamState::List::List()
|
|
: head(NULL), tail(NULL)
|
|
{
|
|
}
|
|
|
|
zmq::norm_engine_t::NormRxStreamState::List::~List()
|
|
{
|
|
Destroy();
|
|
}
|
|
|
|
void zmq::norm_engine_t::NormRxStreamState::List::Destroy()
|
|
{
|
|
NormRxStreamState* item = head;
|
|
while (NULL != item)
|
|
{
|
|
Remove(*item);
|
|
delete item;
|
|
item = head;
|
|
}
|
|
} // end zmq::norm_engine_t::NormRxStreamState::List::Destroy()
|
|
|
|
void zmq::norm_engine_t::NormRxStreamState::List::Append(NormRxStreamState& item)
|
|
{
|
|
item.prev = tail;
|
|
if (NULL != tail)
|
|
tail->next = &item;
|
|
else
|
|
head = &item;
|
|
item.next = NULL;
|
|
tail = &item;
|
|
item.list = this;
|
|
} // end zmq::norm_engine_t::NormRxStreamState::List::Append()
|
|
|
|
void zmq::norm_engine_t::NormRxStreamState::List::Remove(NormRxStreamState& item)
|
|
{
|
|
if (NULL != item.prev)
|
|
item.prev->next = item.next;
|
|
else
|
|
head = item.next;
|
|
if (NULL != item.next)
|
|
item.next ->prev = item.prev;
|
|
else
|
|
tail = item.prev;
|
|
item.prev = item.next = NULL;
|
|
item.list = NULL;
|
|
} // end zmq::norm_engine_t::NormRxStreamState::List::Remove()
|
|
|
|
zmq::norm_engine_t::NormRxStreamState::List::Iterator::Iterator(const List& list)
|
|
: next_item(list.head)
|
|
{
|
|
}
|
|
|
|
zmq::norm_engine_t::NormRxStreamState* zmq::norm_engine_t::NormRxStreamState::List::Iterator::GetNextItem()
|
|
{
|
|
NormRxStreamState* nextItem = next_item;
|
|
if (NULL != nextItem) next_item = nextItem->next;
|
|
return nextItem;
|
|
} // end zmq::norm_engine_t::NormRxStreamState::List::Iterator::GetNextItem()
|
|
|
|
|
|
#endif // ZMQ_HAVE_NORM
|