我遇到了应用程序的udp广播小节问题。我在Windows 10下使用boost 1.62.0。
void test_udp_broadcast(void)
{
boost::asio::io_service io_service;
boost::asio::ip::udp::socket socket(io_service);
boost::asio::ip::udp::endpoint remote_endpoint;
socket.open(boost::asio::ip::udp::v4());
socket.set_option(boost::asio::ip::udp::socket::reuse_address(true));
socket.set_option(boost::asio::socket_base::broadcast(true));
remote_endpoint = boost::asio::ip::udp::endpoint(boost::asio::ip::address_v4::any(), 4000);
try {
socket.bind(remote_endpoint);
socket.send_to(boost::asio::buffer("abc", 3), remote_endpoint);
} catch (boost::system::system_error e) {
std::cout << e.what() << std::endl;
}
}
我收到: send_to:请求的地址在其上下文中无效 从捕获。
我试图将端点从any()更改为broadcast(),但这只会在bind()上抛出相同的错误。
我通常在linux下编程,这段代码适用于我的正常目标。所以我在这里弄错了我的错误。任何人都可以给我一个正确的方向戳?
答案 0 :(得分:3)
我相信您希望使用any()将套接字绑定到本地端点(如果您希望接收广播数据包 - 请参阅this question),并使用broadcast()发送到远程端点(请参阅{{ 3}})。
以下为我编译并且不会抛出任何错误:
void test_udp_broadcast(void)
{
boost::asio::io_service io_service;
boost::asio::ip::udp::socket socket(io_service);
boost::asio::ip::udp::endpoint local_endpoint;
boost::asio::ip::udp::endpoint remote_endpoint;
socket.open(boost::asio::ip::udp::v4());
socket.set_option(boost::asio::ip::udp::socket::reuse_address(true));
socket.set_option(boost::asio::socket_base::broadcast(true));
local_endpoint = boost::asio::ip::udp::endpoint(boost::asio::ip::address_v4::any(), 4000);
remote_endpoint = boost::asio::ip::udp::endpoint(boost::asio::ip::address_v4::broadcast(), 4000);
try {
socket.bind(local_endpoint);
socket.send_to(boost::asio::buffer("abc", 3), remote_endpoint);
} catch (boost::system::system_error e) {
std::cout << e.what() << std::endl;
}
}