boost-asio

问题 I'm working with Intel SGX which has predefined structures. I need to send these structures over a network connection which is operated by using boost::asio . The structure that needs to be send has the following format: typedef struct _ra_samp_request_header_t{ uint8_t type; /* set to one of ra_msg_type_t*/ uint32_t size; /*size of request body*/ uint8_t align[3]; uint8_t body[]; } ra_samp_request_header_t; For the sending and receiving, the methods async_write and async_async_read_some are

问题 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

问题 Is Asio still developed separate from Boost, or is Boost.Asio the only version still being updated? On the Asio website they talk about there being benefits to both versions, and that Asio is updated more often than Boost is. However, the latest dev release on the site is 1.5.3, released in March of 2011, whereas the latest Boost 1.53 release from February 2013 includes Asio 1.8.3, with a large number of changes since 1.5.3. Either the Asio website was abandoned without notification in favor

问题 Is Asio still developed separate from Boost, or is Boost.Asio the only version still being updated? On the Asio website they talk about there being benefits to both versions, and that Asio is updated more often than Boost is. However, the latest dev release on the site is 1.5.3, released in March of 2011, whereas the latest Boost 1.53 release from February 2013 includes Asio 1.8.3, with a large number of changes since 1.5.3. Either the Asio website was abandoned without notification in favor

问题 I've been learning about UDP socket lately by browsing the net and all the pages that were explaining it were mentioning that UDP sockets are "connection less". This, if I understand it correctly means that one does not have a "connection" between two sockets but instead shoots datagram packets to specified endpoints without knowing whether the other end is listening. Then I go and start reading the boost::asio::ip::udp::socket docs and find that it mentions API like: async_connect: Start an

问题 I want to remove all handlers from an IO_service right before I reuse it. Is this possible? I'm writing unit tests that involve an asio::io_service . In between each test case I want to clear the handlers from the global io_service . I thought that io_service::reset would to that but it doesn't. reset() only allows the io_service to be resumed. All of the handlers from the last test case are still queued up. I only need to do this for unit testing so any crazy hack would work. More info: The

问题 Somehow a followup of this question. I am only wondering if it is ok to use a std::mutex in functions handeled by a boost::asio:io_service ? Usage of strands is somwhat unpractical. From what I found in the boost reference I would say it is ok. Since it states that Asynchronous completion handlers will only be called from threads that are currently calling io_service::run(). So other threads created by boost should not interfere. Did I get it right? 回答1: Yes, using a std::mutex inside of a

问题 I tried to solve my Problem for a few days now and just can't get behind it. I try to do an SSL Connection with the Boost::Asio Library and OpenSSL. There is an Example Code, how to do this: http://www.boost.org/doc/libs/1_55_0/doc/html/boost_asio/example/cpp03/ssl/client.cpp It builds and runs fine and even the verifying seems to work, but when I send a simple request, nothing happens for quite a long time, and then i get an error Message: "Read Failed: short read". I guess, I'm just doing

问题 I've been trying to get this to work for a couple of days however I keep getting a 400 error from the server. Basically, what I'm trying to do is send a http POST request to a server that requires a JSON request body with a couple of properties. These are the libs I'm currently using UPDATED --- 7/23/13 10:00am just noticed I'm using TCP instead of HTTP not sure how much this will effect an HTTP call but i can't find any examples of clients using pure HTTP with BOOST::ASIO #include <iostream>

问题 I'm writing multicast client/server application based on this and this; which work great. However, I would also need to do something when the number of active network interfaces in the computer changes, something like what the program in the example section of this page does. I guess I should use the tools in boost::asio::local, but I am unsure whether I should use boost::asio::local::datagram_protocol or boost::asio::local::stream_protocol or... An example of how to do something as similar