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testChassis.cc

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/**************************************************************************
 Copyright (c) 2000-2001, Tony Garnock-Jones
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:

     * Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.

     * Redistributions in binary form must reproduce the above
       copyright notice, this list of conditions and the following
       disclaimer in the documentation and/or other materials provided
       with the distribution.

     * Neither the names of the copyright holders nor the names of this
       software's contributors may be used to endorse or promote
       products derived from this software without specific prior
       written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**************************************************************************/

#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#include <exception>
#include <string>

#include <FileDescriptor.h>
#include <SocketDescriptor.h>

#include <mps/mps.h>

typedef map< int, ref<FileDescriptor> > outputMap_t;
static outputMap_t outputs;

///////////////////////////////////////////////////////////////////////////

class ReadCallback: public FileDescriptor::Callback {
public:
  string readLine(ref<FileDescriptor> const &desc) {
    string inputLine;
    int ch;

    while (desc->read(ch) && ch != '\n') {
      if (ch != '\r')
        inputLine.append(1, (char) ch);
    }

    return inputLine;
  }

  void sendToAll(string line) {
    for (outputMap_t::iterator i = outputs.begin();
         i != outputs.end();
         i++) {
      (*i).second->write(line.data(), line.size());
    }
  }

  void readHandler(ref<FileDescriptor> const &desc) {
    try {
      string inputLine = readLine(desc);
      fprintf(stderr, "Read line '%s' from fd %d\n", inputLine.c_str(), desc->getFd());

      if (inputLine == "quit") {
        fprintf(stderr, "Received quit request on fd %d\n", desc->getFd());
        outputs.erase(outputs.find(desc->getFd()));
        desc->close();
      } else {
        char fdcount[20];
        sprintf(fdcount, "%d/%d", desc->getFd(), desc->getFdMgr()->getCountRegistered());

        string outputLine = ">>> " + string(fdcount) + ": " + inputLine + "\r\n";
        sendToAll(outputLine);
      }
    } catch (FileDescriptor::Exception &e) {
      fprintf(stderr, "Exception in readHandler: %s (%d: %s)\n",
              e.what(),
              e.getErrno(), strerror(e.getErrno()));
      outputs.erase(outputs.find(desc->getFd()));
      desc->close();
    }
  }
};

///////////////////////////////////////////////////////////////////////////

class AcceptCallback: public FileDescriptor::Callback {
private:
  ref<FileDescriptorManager> fdmgr;
  ref<ServerSocketDescriptor> server;

public:
  AcceptCallback(ref<FileDescriptorManager> const &_fdmgr,
                 ref<ServerSocketDescriptor> const &_server)
    : fdmgr(_fdmgr),
      server(_server)
  {}

  void acceptHandler(ref<FileDescriptor> const &desc) {
    if (desc.get() != server.get())
      throw FileDescriptor::Exception("Bloody hell! Unmatched FileDescriptor object!");

    ref<SocketDescriptor> sock = server->accept();
    fprintf(stderr, "Accepted new connection on fd %d\n", sock->getFd());
    outputs[sock->getFd()] = sock;

    sock->setReadCallback(new ReadCallback(),
                          (FileDescriptor::Callback::Method) &ReadCallback::readHandler);
  }
};

///////////////////////////////////////////////////////////////////////////

static void doServer() {
  ref<FileDescriptorManager> fdmgr = new FileDescriptorManager();
  ref<ServerSocketDescriptor> server = new ServerSocketDescriptor(fdmgr);

  fprintf(stderr, "Canonical address: %s\n", server->getCanonicalAddress().c_str());

  ref<AcceptCallback> cb = new AcceptCallback(fdmgr, server);
  server->setReadCallback(cb, (FileDescriptor::Callback::Method) &AcceptCallback::acceptHandler);

  fdmgr->mainloop();
}

///////////////////////////////////////////////////////////////////////////

static void doClient() {
  fprintf(stderr, "Unimplemented stub at the moment.\n");
}

int main(int argc, char *argv[]) {
  if (argc < 2) {
    fprintf(stderr,
            "Usage: testChassis <cmdType>\n"
            " where cmdType is one of -\n"
            "   server\n"
            "   client\n");
    exit(1);
  }

  string cmdType = argv[1];

  try {
    if (cmdType == "server") {
      doServer();
    } else if (cmdType == "client") {
      doClient();
    } else {
      fprintf(stderr, "Unknown cmdType %s\n", cmdType.c_str());
      exit(1);
    }
  } catch (exception &e) {
    fprintf(stderr, "Straight std::exception: %s\n", e.what());
  } catch (MPS::MPSException &mpse) {
    fprintf(stderr, "MPSException: %s\n", mpse.getMessage().c_str());
  } catch (...) {
    fprintf(stderr, "Unknown exception!\n");
  }

  return 0;
}

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