boost-asio

When I lose connection, in my server code, I try to reconnect in a loop forever. Once I reconnect, I send a login message to the component I am connected to. That component then sends back a login response that looks like "MyResponse" The initial connection works fine. After I reconnect, however, I get garbage before the expected message, that looks like: "ýMyResponse" After googling this. I see many questions on Stack Overflow about the boost::asio::streambuf that is used for async sockets in boost::asio. Particularly about reusing he buffer. I have followed the advice there and called

I have a simple client /server application the code of which is mentioned below. Please run the server in one shell and the client in another shell in linux. First start the server and then the client. When the server is done with it's work, it crashes with following exception: terminate called after throwing an instance of 'std::system_error' what(): Resource deadlock avoided This happens from the line m_thread->join() from inside the function Service::HandleClient I have no clue on what's going on.. Can someone please check the code.. I just want that the server application should also get

I am using boost::asio::ip::udp::resolver in an SNMPV2 implementation to determine wheather a host is reachable or not. using Resolver = boost::asio::ip::udp::resolver; Resolver resolver(ioService); Resolver::query query(connectOptions.getHost(), connectOptions.getPort()); Resolver::iterator endpointIterator; BOOST_LOG_SEV(logger, Severity::debug) << "Waiting for async resolve"; endpointIterator = resolver.async_resolve(query, yield); BOOST_LOG_SEV(logger, Severity::debug) << "Async resolve done"; if (endpointIterator == Resolver::iterator{}) { // unreachable host using namespace boost::system

I use boost::asio::read (or may be the equivalent async_read ) to read some data from a socket. Is it possible that I leave the bytes read in the underlying socket so that next time I call read on the socket I receive again that data ? Like Simon said, you can't do it with boost::asio::read() (or boost::asio::async_read() ). However, for read() you could call native_handle() on the socket to get the socket descriptor and then use ::recvmsg() with the MSG_PEEK flag. Similarly, you could call async_read() with null_buffers() as the receive buffer and then use the native_handle() / ::recvmsg()

When I read asio source code, I am curious about how asio making data synchronized between threads even a implicit strand was made. These are code in asio: io_service::run mutex::scoped_lock lock(mutex_); std::size_t n = 0; for (; do_run_one(lock, this_thread, ec); lock.lock()) if (n != (std::numeric_limits<std::size_t>::max)()) ++n; return n; io_service::do_run_one while (!stopped_) { if (!op_queue_.empty()) { // Prepare to execute first handler from queue. operation* o = op_queue_.front(); op_queue_.pop(); bool more_handlers = (!op_queue_.empty()); if (o == &task_operation_) { task

A new error arose with my server (boost::asio based) once I implemented reconnection on my client but I am not even sure if this is the cause. The scenario is like this: I run Client.exe which can reconnect in case a server is not running. Client.exe creates several objects which connect independently to my server. So several connections to my servers are created from the same process. Because I haven't run the server yet, every object try to reconnect every 3 seconds (some of them concurrently so not always at the same time). The problem occurs sometimes when I start the server: I get the "An