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Diffstat (limited to 'qpid/cpp/src/tests/SocketProxy.h')
| -rw-r--r-- | qpid/cpp/src/tests/SocketProxy.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/qpid/cpp/src/tests/SocketProxy.h b/qpid/cpp/src/tests/SocketProxy.h new file mode 100644 index 0000000000..d195f11aa9 --- /dev/null +++ b/qpid/cpp/src/tests/SocketProxy.h @@ -0,0 +1,183 @@ +#ifndef SOCKETPROXY_H +#define SOCKETPROXY_H + +/* + * 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/IOHandle.h" +#ifdef _WIN32 +# include "qpid/sys/windows/IoHandlePrivate.h" + typedef SOCKET FdType; +#else +# include "qpid/sys/posix/PrivatePosix.h" + typedef int FdType; +#endif +#include "qpid/sys/Socket.h" +#include "qpid/sys/Runnable.h" +#include "qpid/sys/Thread.h" +#include "qpid/sys/Mutex.h" +#include "qpid/log/Statement.h" + +#include <boost/lexical_cast.hpp> + +namespace qpid { +namespace tests { + +/** + * A simple socket proxy that forwards to another socket. + * Used between client & local broker to simulate network failures. + */ +class SocketProxy : private qpid::sys::Runnable +{ + // Need a Socket we can get the fd from + class LowSocket : public qpid::sys::Socket { + public: +#ifdef _WIN32 + FdType getFd() { return toSocketHandle(*this); } +#else + FdType getFd() { return toFd(impl); } +#endif + }; + + public: + /** Connect to connectPort on host, start a forwarding thread. + * Listen for connection on getPort(). + */ + SocketProxy(int connectPort, const std::string host="localhost") + : closed(false), joined(true), + port(listener.listen()), dropClient(), dropServer() + { + client.connect(host, boost::lexical_cast<std::string>(connectPort)); + joined = false; + thread = qpid::sys::Thread(static_cast<qpid::sys::Runnable*>(this)); + } + + ~SocketProxy() { close(); if (!joined) thread.join(); } + + /** Simulate a network disconnect. */ + void close() { + { + qpid::sys::Mutex::ScopedLock l(lock); + if (closed) { return; } + closed=true; + } + if (thread && thread != qpid::sys::Thread::current()) { + thread.join(); + joined = true; + } + client.close(); + } + + /** Simulate lost packets, drop data from client */ + void dropClientData(bool drop=true) { dropClient=drop; } + + /** Simulate lost packets, drop data from server */ + void dropServerData(bool drop=true) { dropServer=drop; } + + bool isClosed() const { + qpid::sys::Mutex::ScopedLock l(lock); + return closed; + } + + uint16_t getPort() const { return port; } + + private: + static void throwErrno(const std::string& msg) { + throw qpid::Exception(msg+":"+qpid::sys::strError(errno)); + } + static void throwIf(bool condition, const std::string& msg) { + if (condition) throw qpid::Exception(msg); + } + + void run() { + std::auto_ptr<LowSocket> server; + try { + fd_set socks; + FdType maxFd = listener.getFd(); + struct timeval tmo; + for (;;) { + FD_ZERO(&socks); + FD_SET(maxFd, &socks); + tmo.tv_sec = 0; + tmo.tv_usec = 500 * 1000; + if (select(maxFd+1, &socks, 0, 0, &tmo) == 0) { + qpid::sys::Mutex::ScopedLock l(lock); + throwIf(closed, "SocketProxy: Closed by close()"); + continue; + } + throwIf(!FD_ISSET(maxFd, &socks), "SocketProxy: Accept failed"); + break; // Accept ready... go to next step + } + server.reset(reinterpret_cast<LowSocket *>(listener.accept())); + maxFd = server->getFd(); + if (client.getFd() > maxFd) + maxFd = client.getFd(); + char buffer[1024]; + for (;;) { + FD_ZERO(&socks); + tmo.tv_sec = 0; + tmo.tv_usec = 500 * 1000; + FD_SET(client.getFd(), &socks); + FD_SET(server->getFd(), &socks); + if (select(maxFd+1, &socks, 0, 0, &tmo) == 0) { + qpid::sys::Mutex::ScopedLock l(lock); + throwIf(closed, "SocketProxy: Closed by close()"); + continue; + } + // Something is set; relay data as needed until something closes + if (FD_ISSET(server->getFd(), &socks)) { + int n = server->read(buffer, sizeof(buffer)); + throwIf(n <= 0, "SocketProxy: server disconnected"); + if (!dropServer) client.write(buffer, n); + } + if (FD_ISSET(client.getFd(), &socks)) { + int n = client.read(buffer, sizeof(buffer)); + throwIf(n <= 0, "SocketProxy: client disconnected"); + if (!dropServer) server->write(buffer, n); + } + if (!FD_ISSET(client.getFd(), &socks) && + !FD_ISSET(server->getFd(), &socks)) + throwIf(true, "SocketProxy: No handle ready"); + } + } + catch (const std::exception& e) { + QPID_LOG(debug, "SocketProxy::run exception: " << e.what()); + } + try { + if (server.get()) server->close(); + close(); + } + catch (const std::exception& e) { + QPID_LOG(debug, "SocketProxy::run exception in client/server close()" << e.what()); + } + } + + mutable qpid::sys::Mutex lock; + mutable bool closed; + bool joined; + LowSocket client, listener; + uint16_t port; + qpid::sys::Thread thread; + bool dropClient, dropServer; +}; + +}} // namespace qpid::tests + +#endif |