src/snmp/Forwarder.h

   1 /*
   2  * Copyright (C) 1996-2020 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 49    SNMP Interface */
  10
  11 #ifndef SQUID_SNMPX_FORWARDER_H
  12 #define SQUID_SNMPX_FORWARDER_H
  13
  14 #include "ipc/Forwarder.h"
  15 #include "snmp/Pdu.h"
  16 #include "snmp/Session.h"
  17
  18 class CommCloseCbParams;
  19
  20 namespace Snmp
  21 {
  22
  23 /** Forwards a single client SNMP request to Coordinator.
  24  * Waits for an ACK from Coordinator
  25  * Send the data unit with an error response if forwarding fails.
  26  */
  27 class Forwarder: public Ipc::Forwarder
  28 {
  29     CBDATA_CLASS(Forwarder);
  30
  31 public:
  32     Forwarder(const Pdu& aPdu, const Session& aSession, int aFd,
  33               const Ip::Address& anAddress);
  34
  35 protected:
  36     /* Ipc::Forwarder API */
  37     virtual void swanSong();
  38     virtual void handleTimeout();
  39     virtual void handleException(const std::exception& e);
  40
  41 private:
  42     void noteCommClosed(const CommCloseCbParams& params);
  43     void sendError(int error);
  44
  45 private:
  46     int fd; ///< client connection descriptor
  47     AsyncCall::Pointer closer; ///< comm_close handler for the connection
  48 };
  49
  50 void SendResponse(unsigned int requestId, const Pdu& pdu);
  51
  52 } // namespace Snmp
  53
  54 #endif /* SQUID_SNMPX_FORWARDER_H */
  55