Michael Davidsaver
105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* pvxs is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*/
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#ifndef CONN_H
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#define CONN_H
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#include "evhelper.h"
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#include "dataimpl.h"
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#include "utilpvt.h"
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namespace pvxs {
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namespace impl {
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struct ConnBase
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{
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const SockAddr peerAddr;
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const std::string peerName;
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protected:
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evbufferevent bev;
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public:
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TypeStore rxRegistry;
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/* Flag if some received delta could not be decoded due to
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* a non-existent IOID, which *may* leave this rxRegistry out
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* of sync with the peer (if it contains Variant Unions).
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* We can't know whether this is the case.
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* Failing soft here may lead to failures decoding future replies.
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* We could force close the Connection here to be "safe".
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* However, we assume the such usage of Variant is relatively rare
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*/
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bool rxRegistryDirty = false;
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const bool isClient;
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bool sendBE;
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bool peerBE;
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bool expectSeg;
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uint8_t peerVersion;
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uint8_t segCmd;
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evbuf segBuf, txBody;
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size_t statTx{}, statRx{};
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size_t readahead{};
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enum {
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Holdoff,
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Connecting,
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Connected,
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Disconnected,
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} state;
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ConnBase(bool isClient, bool sendBE, bufferevent* bev, const SockAddr& peerAddr);
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ConnBase(const ConnBase&) = delete;
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ConnBase& operator=(const ConnBase&) = delete;
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virtual ~ConnBase();
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const char* peerLabel() const;
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size_t enqueueTxBody(pva_app_msg_t cmd);
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bufferevent* connection() { return bev.get(); }
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void connect(bufferevent* bev);
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void disconnect();
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protected:
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#define CASE(Op) virtual void handle_##Op();
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CASE(ECHO);
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CASE(CONNECTION_VALIDATION);
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CASE(CONNECTION_VALIDATED);
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CASE(SEARCH);
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CASE(SEARCH_RESPONSE);
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CASE(AUTHNZ);
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CASE(CREATE_CHANNEL);
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CASE(DESTROY_CHANNEL);
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CASE(GET);
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CASE(PUT);
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CASE(PUT_GET);
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CASE(MONITOR);
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CASE(RPC);
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CASE(CANCEL_REQUEST);
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CASE(DESTROY_REQUEST);
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CASE(GET_FIELD);
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CASE(MESSAGE);
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#undef CASE
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virtual std::shared_ptr<ConnBase> self_from_this() =0;
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virtual void cleanup() =0;
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virtual void bevEvent(short events);
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virtual void bevRead();
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virtual void bevWrite();
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static void bevEventS(struct bufferevent *bev, short events, void *ptr);
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static void bevReadS(struct bufferevent *bev, void *ptr);
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static void bevWriteS(struct bufferevent *bev, void *ptr);
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};
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} // namespace impl
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} // namespace pvxs
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#endif // CONN_H
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