mirror of
https://github.com/matrix-construct/construct
synced 2024-11-17 23:40:57 +01:00
ircd::net: Various fixes / error handling / api.
This commit is contained in:
Jason Volk
parent
f36d3e2209
commit
2ce9b0521f
4 changed files with 299 additions and 140 deletions
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@ -42,6 +42,7 @@ namespace ircd::net
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struct remote;
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struct socket;
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struct listener;
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enum class dc;
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// SNOMASK 'N' "net"
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extern struct log::log log;
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@ -50,6 +51,16 @@ namespace ircd::net
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#include "remote.h"
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#include "listener.h"
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enum class ircd::net::dc
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{
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RST, ///< hardest immediate termination
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FIN, ///< sd graceful shutdown both directions
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FIN_SEND, ///< sd graceful shutdown send side
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FIN_RECV, ///< sd graceful shutdown recv side
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SSL_NOTIFY, ///< SSL close_notify (async, errors ignored)
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SSL_NOTIFY_YIELD, ///< SSL close_notify (yields context, throws)
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};
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// Public interface to socket.h because it is not included here.
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namespace ircd::net
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{
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@ -69,6 +80,9 @@ namespace ircd::net
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size_t read(socket &, const iov<mutable_buffer> &); // read_all
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size_t read(socket &, const mutable_buffer &); // read_all
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size_t read(socket &, iov<mutable_buffer> &); // read_some
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std::shared_ptr<socket> connect(const remote &, const milliseconds &timeout = 30000ms);
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bool disconnect(socket &, const dc &type = dc::SSL_NOTIFY) noexcept;
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}
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namespace ircd
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@ -42,9 +42,9 @@ namespace ircd::net
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uint16_t port(const ip::tcp::endpoint &);
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ip::address addr(const ip::tcp::endpoint &);
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std::string host(const ip::tcp::endpoint &);
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std::string string(const ip::address &);
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std::string string(const ip::tcp::endpoint &);
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std::shared_ptr<socket> connect(const ip::tcp::endpoint &remote, const milliseconds &timeout);
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}
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namespace ircd
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@ -62,7 +62,6 @@ struct ircd::net::socket
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struct io;
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struct stat;
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struct scope_timeout;
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enum class dc;
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struct stat
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{
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@ -127,21 +126,8 @@ struct ircd::net::socket
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void connect(const ip::tcp::endpoint &ep, const milliseconds &timeout, handler callback);
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void connect(const ip::tcp::endpoint &ep, const milliseconds &timeout = 30000ms);
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void connect(const net::remote &, const milliseconds &timeout = 30000ms);
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void disconnect(const dc &type);
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bool disconnect(const dc &type);
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// Construct, resolve and connect client socket to remote host (yields)
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socket(const net::remote &,
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const milliseconds &timeout = 30000ms,
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asio::ssl::context &ssl = sslv23_client,
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boost::asio::io_service *const &ios = ircd::ios);
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// Construct and connect client socket to remote host (yields)
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socket(const ip::tcp::endpoint &remote,
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const milliseconds &timeout = 30000ms,
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asio::ssl::context &ssl = sslv23_client,
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boost::asio::io_service *const &ios = ircd::ios);
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// Construct socket only
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socket(asio::ssl::context &ssl = sslv23_client,
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boost::asio::io_service *const &ios = ircd::ios);
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@ -182,16 +168,6 @@ class ircd::net::socket::io
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io(struct socket &, struct stat &, const std::function<size_t ()> &closure);
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};
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enum class ircd::net::socket::dc
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{
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RST, // hardest disconnect
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FIN, // graceful shutdown both directions
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FIN_SEND, // graceful shutdown send side
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FIN_RECV, // graceful shutdown recv side
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SSL_NOTIFY, // SSL close_notify (async, errors ignored)
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SSL_NOTIFY_YIELD, // SSL close_notify (yields context, throws)
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};
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template<class iov>
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auto
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ircd::net::socket::write(const iov &bufs)
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151
ircd/client.cc
151
ircd/client.cc
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@ -54,15 +54,11 @@ ctx::pool request
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// Container for all active clients (connections) for iteration purposes.
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client::list client::clients;
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bool handle_ec_timeout(client &);
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bool handle_ec_eof(client &);
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bool handle_ec_success(client &);
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bool handle_ec(client &, const net::error_code &);
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static bool handle_ec(client &, const net::error_code &);
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void async_recv_next(std::shared_ptr<client>, const milliseconds &timeout);
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void async_recv_next(std::shared_ptr<client>);
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void disconnect(client &, const socket::dc & = socket::dc::RST);
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void disconnect(client &, const net::dc & = net::dc::RST);
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void disconnect_all();
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template<class... args> std::shared_ptr<client> make_client(args&&...);
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@ -196,7 +192,7 @@ ircd::client::client(const hostport &host_port,
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const seconds &timeout)
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:client
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{
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std::make_shared<socket>(host_port, timeout)
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net::connect(host_port, timeout)
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}
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{
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}
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@ -211,8 +207,7 @@ ircd::client::client(std::shared_ptr<socket> sock)
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ircd::client::~client()
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noexcept try
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{
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if(sock)
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sock->disconnect(socket::dc::SSL_NOTIFY);
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disconnect(*this, net::dc::SSL_NOTIFY);
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}
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catch(const std::exception &e)
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{
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@ -232,7 +227,7 @@ noexcept try
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{
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const auto header_max{8192};
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const auto content_max{65536};
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unique_buffer<mutable_buffer> buffer
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const unique_buffer<mutable_buffer> buffer
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{
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header_max + content_max
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};
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@ -251,18 +246,21 @@ noexcept try
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}
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catch(const boost::system::system_error &e)
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{
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using boost::asio::error::eof;
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using boost::asio::error::broken_pipe;
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using boost::asio::error::connection_reset;
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using namespace boost::system::errc;
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using boost::system::get_system_category;
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using boost::asio::error::get_ssl_category;
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using boost::asio::error::get_misc_category;
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switch(e.code().value())
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const auto ec
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{
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e.code()
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};
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if(ec.category() == get_system_category()) switch(ec.value())
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{
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case success:
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assert(0);
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return true;
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case eof:
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case broken_pipe:
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case connection_reset:
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case not_connected:
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@ -272,8 +270,27 @@ catch(const boost::system::system_error &e)
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default:
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break;
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}
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else if(ec.category() == get_misc_category()) switch(ec.value())
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{
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case boost::asio::error::eof:
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return false;
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default:
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break;
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}
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else if(ec.category() == get_ssl_category()) switch(ec.value())
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{
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case SSL_R_SHORT_READ:
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return false;
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default:
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break;
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}
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log::critical("client(%p): (unexpected) system_error: %s",
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(const void *)this,
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e.what());
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log::critical("(unexpected) system_error: %s", e.what());
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if(ircd::debugmode)
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throw;
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@ -297,11 +314,11 @@ ircd::handle_request(client &client,
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try
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{
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client.request_timer = ircd::timer{};
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client.sock->set_timeout(request_timeout, [&client]
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client.sock->set_timeout(request_timeout, [client(shared_from(client))]
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(const net::error_code &ec)
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{
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if(!ec)
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client.sock->cancel();
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disconnect(*client, net::dc::SSL_NOTIFY_YIELD);
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});
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bool ret{true};
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@ -328,10 +345,13 @@ catch(const http::error &e)
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switch(e.code)
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{
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case http::BAD_REQUEST: return false;
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case http::INTERNAL_SERVER_ERROR: return false;
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case http::REQUEST_TIMEOUT: return false;
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default: return true;
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case http::BAD_REQUEST:
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case http::REQUEST_TIMEOUT:
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case http::INTERNAL_SERVER_ERROR:
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return false;
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default:
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return true;
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}
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}
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@ -382,7 +402,7 @@ ircd::disconnect_all()
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{
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for(auto &client : client::clients) try
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{
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disconnect(*client, socket::dc::RST);
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disconnect(*client, net::dc::RST);
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}
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catch(const std::exception &e)
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{
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@ -392,10 +412,10 @@ ircd::disconnect_all()
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void
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ircd::disconnect(client &client,
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const socket::dc &type)
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const net::dc &type)
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{
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auto &sock(*client.sock);
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sock.disconnect(type);
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if(likely(client.sock))
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disconnect(*client.sock, type);
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}
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void
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@ -439,46 +459,85 @@ ircd::async_recv_next(std::shared_ptr<client> client,
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// of the ircd::context system. The context the closure ends up getting is the next
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// available from the request pool, which may not be available immediately so this
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// handler might be queued for some time after this call returns.
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request([client(std::move(client)), timeout]
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request([ec, client, timeout]
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{
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// Right here this handler is executing on an ircd::context with its own
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// stack dedicated to the lifetime of this request. If client::main()
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// returns true, we bring the client back into async mode to wait for
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// the next request. Otherwise, unless the client was preserved by
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// functionality in main(), it will go out of scope after this which
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// will disconnect the socket and destroy the client and return this
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// context to the request pool.
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// the next request.
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if(client->main())
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async_recv_next(client, timeout);
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});
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});
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}
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namespace ircd
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{
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static bool handle_ec_success(client &);
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static bool handle_ec_timeout(client &);
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static bool handle_ec_eof(client &);
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static bool handle_ec_short_read(client &);
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static bool handle_ec_default(client &, const net::error_code &);
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}
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bool
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ircd::handle_ec(client &client,
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const net::error_code &ec)
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{
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using namespace boost::system::errc;
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using boost::asio::error::eof;
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using boost::system::get_system_category;
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using boost::asio::error::get_ssl_category;
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using boost::asio::error::get_misc_category;
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switch(ec.value())
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if(ec.category() == get_system_category()) switch(ec.value())
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{
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case success: return handle_ec_success(client);
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case eof: return handle_ec_eof(client);
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case operation_canceled: return handle_ec_timeout(client);
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default:
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default: return handle_ec_default(client, ec);
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}
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else if(ec.category() == get_misc_category()) switch(ec.value())
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{
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log::debug("client(%p): %s", &client, ec.message());
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disconnect(client, socket::dc::RST);
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return false;
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case asio::error::eof: return handle_ec_eof(client);
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default: return handle_ec_default(client, ec);
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}
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else if(ec.category() == get_ssl_category()) switch(ec.value())
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{
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case SSL_R_SHORT_READ: return handle_ec_short_read(client);
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default: return handle_ec_default(client, ec);
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}
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else return handle_ec_default(client, ec);
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}
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bool
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ircd::handle_ec_success(client &client)
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ircd::handle_ec_default(client &client,
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const net::error_code &ec)
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{
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return true;
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log::debug("client(%p): %s: %s",
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&client,
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ec.category().name(),
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ec.message());
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disconnect(client, net::dc::SSL_NOTIFY);
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return false;
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}
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bool
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ircd::handle_ec_short_read(client &client)
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try
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{
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log::debug("client[%s]: short_read",
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string(remote(client)));
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disconnect(client, net::dc::RST);
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return false;
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}
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catch(const std::exception &e)
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{
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log::warning("client(%p): short_read: %s",
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&client,
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e.what());
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return false;
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}
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bool
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@ -488,7 +547,7 @@ try
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log::debug("client[%s]: EOF",
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string(remote(client)));
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disconnect(client, socket::dc::RST);
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disconnect(client, net::dc::RST);
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return false;
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}
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catch(const std::exception &e)
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@ -508,7 +567,7 @@ try
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log::debug("client[%s]: disconnecting after inactivity timeout",
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string(remote(client)));
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disconnect(client, socket::dc::SSL_NOTIFY);
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disconnect(client, net::dc::SSL_NOTIFY);
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return false;
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}
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catch(const std::exception &e)
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@ -519,3 +578,9 @@ catch(const std::exception &e)
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return false;
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}
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bool
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ircd::handle_ec_success(client &client)
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{
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return true;
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}
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222
ircd/net.cc
222
ircd/net.cc
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@ -293,17 +293,18 @@ noexcept try
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this->next();
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}};
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ip::tcp::socket &sd(*sock);
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log.debug("%s: socket(%p) accepted %s",
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std::string(*this),
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sock.get(),
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string(sock->remote()));
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//ip::tcp::socket &sd(*sock);
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//static const asio::socket_base::keep_alive keep_alive(true);
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//sd.set_option(keep_alive);
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static const asio::socket_base::linger linger{true, 10};
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sd.set_option(linger);
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//static const asio::socket_base::linger linger{true, 10};
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//sd.set_option(linger);
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//sd.non_blocking(false);
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@ -330,7 +331,9 @@ catch(const std::exception &e)
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bool
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ircd::net::listener::acceptor::accept_error(const error_code &ec)
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{
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switch(ec.value())
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using boost::system::get_system_category;
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if(ec.category() == get_system_category()) switch(ec.value())
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{
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using namespace boost::system::errc;
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@ -341,8 +344,10 @@ ircd::net::listener::acceptor::accept_error(const error_code &ec)
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return true;
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default:
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throw boost::system::system_error(ec);
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break;
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}
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throw boost::system::system_error(ec);
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}
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void
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@ -372,7 +377,9 @@ catch(const std::exception &e)
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bool
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ircd::net::listener::acceptor::handshake_error(const error_code &ec)
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{
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switch(ec.value())
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using boost::system::get_system_category;
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if(ec.category() == get_system_category()) switch(ec.value())
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{
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using namespace boost::system::errc;
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@ -383,8 +390,10 @@ ircd::net::listener::acceptor::handshake_error(const error_code &ec)
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return true;
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default:
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throw boost::system::system_error(ec);
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break;
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}
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throw boost::system::system_error(ec);
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}
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void
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@ -724,15 +733,11 @@ ircd::net::socket::scope_timeout::release()
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return s != nullptr;
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}
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//
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// socket
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//
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ircd::net::socket::socket(const net::remote &remote,
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const milliseconds &timeout,
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asio::ssl::context &ssl,
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boost::asio::io_service *const &ios)
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:socket
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std::shared_ptr<ircd::net::socket>
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ircd::net::connect(const net::remote &remote,
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const milliseconds &timeout)
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{
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const asio::ip::tcp::endpoint ep
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{
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is_v6(remote)? asio::ip::tcp::endpoint
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{
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@ -742,22 +747,43 @@ ircd::net::socket::socket(const net::remote &remote,
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{
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asio::ip::address_v4 { host4(remote) }, port(remote)
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},
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timeout,
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ssl,
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ios
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}
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{
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};
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return connect(ep, timeout);
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}
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|
||||
ircd::net::socket::socket(const ip::tcp::endpoint &remote,
|
||||
const milliseconds &timeout,
|
||||
asio::ssl::context &ssl,
|
||||
boost::asio::io_service *const &ios)
|
||||
:socket{ssl, ios}
|
||||
std::shared_ptr<ircd::net::socket>
|
||||
ircd::net::connect(const ip::tcp::endpoint &remote,
|
||||
const milliseconds &timeout)
|
||||
{
|
||||
connect(remote, timeout);
|
||||
const auto ret(std::make_shared<socket>());
|
||||
ret->connect(remote, timeout);
|
||||
return ret;
|
||||
}
|
||||
|
||||
bool
|
||||
ircd::net::disconnect(socket &socket,
|
||||
const dc &type)
|
||||
noexcept try
|
||||
{
|
||||
socket.disconnect(type);
|
||||
return true;
|
||||
}
|
||||
catch(const std::exception &e)
|
||||
{
|
||||
/*
|
||||
log::error("socket(%p): disconnect: type: %d: %s",
|
||||
this,
|
||||
int(type),
|
||||
e.what());
|
||||
*/
|
||||
return false;
|
||||
}
|
||||
|
||||
//
|
||||
// socket
|
||||
//
|
||||
|
||||
ircd::net::socket::socket(asio::ssl::context &ssl,
|
||||
boost::asio::io_service *const &ios)
|
||||
:sd
|
||||
|
|
@ -779,10 +805,18 @@ ircd::net::socket::socket(asio::ssl::context &ssl,
|
|||
{
|
||||
}
|
||||
|
||||
/// The dtor asserts that the socket is not open/connected requiring a
|
||||
/// an SSL close_notify. There's no more room for async callbacks via
|
||||
/// shared_ptr after this dtor.
|
||||
ircd::net::socket::~socket()
|
||||
noexcept try
|
||||
{
|
||||
//disconnect(dc::RST);
|
||||
if(unlikely(RB_DEBUG_LEVEL && connected()))
|
||||
log.critical("Failed to ensure socket(%p) is disconnected from %s before dtor.",
|
||||
this,
|
||||
string(remote()));
|
||||
|
||||
assert(!connected());
|
||||
}
|
||||
catch(const std::exception &e)
|
||||
{
|
||||
|
|
@ -797,13 +831,13 @@ ircd::net::socket::connect(const ip::tcp::endpoint &ep,
|
|||
const milliseconds &timeout)
|
||||
try
|
||||
{
|
||||
const life_guard<socket> lg{*this};
|
||||
const scope_timeout ts{*this, timeout};
|
||||
log.debug("socket(%p) attempting connect to remote: %s for the next %ld$ms",
|
||||
this,
|
||||
string(ep),
|
||||
timeout.count());
|
||||
|
||||
ip::tcp::socket &sd(*this);
|
||||
const scope_timeout ts{*this, timeout};
|
||||
sd.async_connect(ep, yield_context{to_asio{}});
|
||||
log.debug("socket(%p) connected to remote: %s from local: %s; performing handshake...",
|
||||
this,
|
||||
|
|
@ -822,6 +856,9 @@ catch(const std::exception &e)
|
|||
this,
|
||||
string(ep),
|
||||
e.what());
|
||||
|
||||
disconnect(dc::RST);
|
||||
throw;
|
||||
}
|
||||
|
||||
/// Attempt to connect and ssl handshake remote; yields ircd::ctx; throws timeout
|
||||
|
|
@ -856,18 +893,37 @@ ircd::net::socket::connect(const ip::tcp::endpoint &ep,
|
|||
(const error_code &ec)
|
||||
noexcept
|
||||
{
|
||||
if(!timedout)
|
||||
cancel_timeout();
|
||||
else
|
||||
if(timedout)
|
||||
assert(ec == boost::system::errc::operation_canceled);
|
||||
|
||||
if(!timedout)
|
||||
cancel_timeout();
|
||||
|
||||
try
|
||||
{
|
||||
callback(ec);
|
||||
}
|
||||
catch(const std::exception &e)
|
||||
{
|
||||
log.error("socket(%p): connect: unhandled exception from user callback: %s",
|
||||
(const void *)this,
|
||||
e.what());
|
||||
}
|
||||
}};
|
||||
|
||||
auto connect_handler{[this, handshake_handler(std::move(handshake_handler))]
|
||||
(const error_code &ec)
|
||||
noexcept
|
||||
{
|
||||
// Even though the branch on ec below should cancel the timeout on
|
||||
// error, the timeout still needs to be canceled if else anything bad
|
||||
// happens in the remainder of this frame too.
|
||||
const unwind::exceptional cancels{[this]
|
||||
{
|
||||
cancel_timeout();
|
||||
}};
|
||||
|
||||
// A connect error
|
||||
if(ec)
|
||||
{
|
||||
handshake_handler(ec);
|
||||
|
|
@ -878,12 +934,11 @@ ircd::net::socket::connect(const ip::tcp::endpoint &ep,
|
|||
ssl.async_handshake(handshake, std::move(handshake_handler));
|
||||
}};
|
||||
|
||||
set_timeout(timeout);
|
||||
ip::tcp::socket &sd(*this);
|
||||
sd.async_connect(ep, std::move(connect_handler));
|
||||
set_timeout(timeout);
|
||||
}
|
||||
|
||||
void
|
||||
bool
|
||||
ircd::net::socket::disconnect(const dc &type)
|
||||
try
|
||||
{
|
||||
|
|
@ -901,51 +956,58 @@ try
|
|||
default:
|
||||
case dc::RST:
|
||||
sd.close();
|
||||
break;
|
||||
return true;
|
||||
|
||||
case dc::FIN:
|
||||
sd.shutdown(ip::tcp::socket::shutdown_both);
|
||||
break;
|
||||
return true;
|
||||
|
||||
case dc::FIN_SEND:
|
||||
sd.shutdown(ip::tcp::socket::shutdown_send);
|
||||
break;
|
||||
return true;
|
||||
|
||||
case dc::FIN_RECV:
|
||||
sd.shutdown(ip::tcp::socket::shutdown_receive);
|
||||
break;
|
||||
return true;
|
||||
|
||||
case dc::SSL_NOTIFY_YIELD:
|
||||
{
|
||||
const life_guard<socket> lg{*this};
|
||||
const scope_timeout ts{*this, 8s};
|
||||
ssl.async_shutdown(yield_context{to_asio{}});
|
||||
sd.close();
|
||||
break;
|
||||
return true;
|
||||
}
|
||||
|
||||
case dc::SSL_NOTIFY:
|
||||
{
|
||||
set_timeout(8s);
|
||||
ssl.async_shutdown([s(shared_from_this())]
|
||||
(boost::system::error_code ec) noexcept
|
||||
{
|
||||
if(ec)
|
||||
{
|
||||
log.warning("socket(%p): close_notify: %s",
|
||||
s.get(),
|
||||
ec.message());
|
||||
return;
|
||||
}
|
||||
if(!s->timedout)
|
||||
s->cancel_timeout();
|
||||
|
||||
if(ec)
|
||||
log.warning("socket(%p): SSL_NOTIFY: %s: %s",
|
||||
s.get(),
|
||||
ec.category().name(),
|
||||
ec.message());
|
||||
|
||||
if(!s->sd.is_open())
|
||||
return;
|
||||
|
||||
if(s->sd.is_open())
|
||||
s->sd.close(ec);
|
||||
|
||||
if(ec)
|
||||
log.warning("socket(%p): close(): %s",
|
||||
log.warning("socket(%p): after SSL_NOTIFY: %s: %s",
|
||||
s.get(),
|
||||
ec.category().name(),
|
||||
ec.message());
|
||||
});
|
||||
break;
|
||||
return true;
|
||||
}
|
||||
}
|
||||
else return false;
|
||||
}
|
||||
catch(const boost::system::system_error &e)
|
||||
{
|
||||
|
|
@ -953,6 +1015,18 @@ catch(const boost::system::system_error &e)
|
|||
(const void *)this,
|
||||
uint(type),
|
||||
e.what());
|
||||
|
||||
if(!sd.is_open())
|
||||
throw;
|
||||
|
||||
boost::system::error_code ec;
|
||||
sd.close(ec);
|
||||
|
||||
if(ec)
|
||||
log.warning("socket(%p): after disconnect: %s: %s",
|
||||
this,
|
||||
ec.category().name(),
|
||||
ec.message());
|
||||
throw;
|
||||
}
|
||||
|
||||
|
|
@ -1041,7 +1115,10 @@ noexcept try
|
|||
// user's callback. Otherwise they are passed up.
|
||||
if(!handle_error(ec))
|
||||
{
|
||||
log.debug("socket(%p): %s", this, ec.message());
|
||||
log.warning("socket(%p): %s",
|
||||
this,
|
||||
ec.category().name(),
|
||||
ec.message());
|
||||
return;
|
||||
}
|
||||
|
||||
|
|
@ -1083,8 +1160,17 @@ bool
|
|||
ircd::net::socket::handle_error(const error_code &ec)
|
||||
{
|
||||
using namespace boost::system::errc;
|
||||
using boost::system::get_system_category;
|
||||
using boost::asio::error::get_ssl_category;
|
||||
using boost::asio::error::get_misc_category;
|
||||
|
||||
switch(ec.value())
|
||||
if(ec != success)
|
||||
log.error("socket(%p): handle error: %s: %s",
|
||||
this,
|
||||
ec.category().name(),
|
||||
ec.message());
|
||||
|
||||
if(ec.category() == get_system_category()) switch(ec.value())
|
||||
{
|
||||
// A success is not an error; can call the user handler
|
||||
case success:
|
||||
|
|
@ -1096,11 +1182,6 @@ ircd::net::socket::handle_error(const error_code &ec)
|
|||
case operation_canceled:
|
||||
return timedout;
|
||||
|
||||
// This indicates the remote closed the socket, we still
|
||||
// pass this up to the user so they can handle it.
|
||||
case boost::asio::error::eof:
|
||||
return true;
|
||||
|
||||
// This is a condition which we hide from the user.
|
||||
case bad_file_descriptor:
|
||||
return false;
|
||||
|
|
@ -1109,6 +1190,28 @@ ircd::net::socket::handle_error(const error_code &ec)
|
|||
default:
|
||||
return true;
|
||||
}
|
||||
else if(ec.category() == get_misc_category()) switch(ec.value())
|
||||
{
|
||||
// This indicates the remote closed the socket, we still
|
||||
// pass this up to the user so they can know that too.
|
||||
case boost::asio::error::eof:
|
||||
return true;
|
||||
|
||||
default:
|
||||
return true;
|
||||
}
|
||||
else if(ec.category() == get_ssl_category()) switch(ec.value())
|
||||
{
|
||||
// Docs say this means we read less bytes off the socket than desired.
|
||||
case SSL_R_SHORT_READ:
|
||||
return true;
|
||||
|
||||
default:
|
||||
return true;
|
||||
}
|
||||
|
||||
assert(0);
|
||||
return true;
|
||||
}
|
||||
|
||||
void
|
||||
|
|
@ -1130,6 +1233,7 @@ noexcept try
|
|||
|
||||
// A cancelation means there was no timeout.
|
||||
case operation_canceled:
|
||||
assert(ec.category() == boost::system::get_system_category());
|
||||
timedout = false;
|
||||
break;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue