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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "qpid/sys/rdma/RdmaIO.h"
#include <arpa/inet.h>
#include <vector>
#include <queue>
#include <string>
#include <iostream>
#include <boost/bind.hpp>
using std::vector;
using std::queue;
using std::string;
using std::cout;
using std::cerr;
using qpid::sys::Poller;
using qpid::sys::Dispatcher;
// All the accepted connections
struct ConRec {
Rdma::Connection::intrusive_ptr connection;
Rdma::AsynchIO* data;
queue<Rdma::Buffer*> queuedWrites;
ConRec(Rdma::Connection::intrusive_ptr c) :
connection(c)
{}
};
void dataError(Rdma::AsynchIO&) {
cout << "Data error:\n";
}
void idle(ConRec* cr, Rdma::AsynchIO& a) {
// Need to make sure full is not called as it would reorder messages
while (!cr->queuedWrites.empty() && a.writable()) {
Rdma::Buffer* buf = cr->queuedWrites.front();
cr->queuedWrites.pop();
a.queueWrite(buf);
}
}
void data(ConRec* cr, Rdma::AsynchIO& a, Rdma::Buffer* b) {
// Echo data back
Rdma::Buffer* buf = a.getBuffer();
std::copy(b->bytes+b->dataStart, b->bytes+b->dataStart+b->dataCount, buf->bytes);
buf->dataCount = b->dataCount;
if (cr->queuedWrites.empty()) {
// If can't write then full will be called and push buffer on back of queue
a.queueWrite(buf);
} else {
cr->queuedWrites.push(buf);
// Try to empty queue
idle(cr, a);
}
}
void full(ConRec* cr, Rdma::AsynchIO&, Rdma::Buffer* buf) {
cr->queuedWrites.push(buf);
}
void disconnected(Rdma::Connection::intrusive_ptr& ci) {
ConRec* cr = ci->getContext<ConRec>();
cr->connection->disconnect();
cr->data->queueWriteClose();
delete cr;
cout << "Disconnected: " << cr << "\n";
}
void connectionError(Rdma::Connection::intrusive_ptr& ci, Rdma::ErrorType) {
ConRec* cr = ci->getContext<ConRec>();
cr->connection->disconnect();
if (cr) {
cr->data->queueWriteClose();
delete cr;
}
cout << "Connection error: " << cr << "\n";
}
bool connectionRequest(Rdma::Connection::intrusive_ptr& ci, const Rdma::ConnectionParams& cp) {
cout << "Incoming connection: ";
// For fun reject alternate connection attempts
static bool x = false;
x = true;
// Must create aio here so as to prepost buffers *before* we accept connection
if (x) {
ConRec* cr = new ConRec(ci);
Rdma::AsynchIO* aio =
new Rdma::AsynchIO(ci->getQueuePair(),
cp.maxRecvBufferSize, cp.initialXmitCredit, Rdma::DEFAULT_WR_ENTRIES,
boost::bind(data, cr, _1, _2),
boost::bind(idle, cr, _1),
boost::bind(full, cr, _1, _2),
dataError);
ci->addContext(cr);
cr->data = aio;
cout << "Accept=>" << cr << "\n";
} else {
cout << "Reject\n";
}
return x;
}
void connected(Poller::shared_ptr poller, Rdma::Connection::intrusive_ptr& ci) {
static int cnt = 0;
ConRec* cr = ci->getContext<ConRec>();
cout << "Connected: " << cr << "(" << ++cnt << ")\n";
cr->data->start(poller);
}
int main(int argc, char* argv[]) {
vector<string> args(&argv[0], &argv[argc]);
::sockaddr_in sin;
int port = (args.size() < 2) ? 20079 : atoi(args[1].c_str());
cout << "Listening on port: " << port << "\n";
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
sin.sin_addr.s_addr = INADDR_ANY;
try {
boost::shared_ptr<Poller> p(new Poller());
Dispatcher d(p);
Rdma::Listener a((const sockaddr&)(sin),
Rdma::ConnectionParams(16384, Rdma::DEFAULT_WR_ENTRIES),
boost::bind(connected, p, _1),
connectionError,
disconnected,
connectionRequest);
a.start(p);
d.run();
} catch (Rdma::Exception& e) {
int err = e.getError();
cerr << "Error: " << e.what() << "(" << err << ")\n";
}
}
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