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31a3a06828
Solution: setsockopt returns EINVAL if the connection was closed by the peer after the accept returned a valid socket. This is a valid network error and should not cause an assert. To handle this we have to extract the setsockopt from the stream engine, as there's no clean way to return an error from the constructor. Instead, try to set this option before creating the engine in the callers, and return immediately as if the accept had failed to avoid churn. Do the same for the connect calls by setting the option in open_socket, so that the option for that case is set even before connecting, so there's no possible race condition. Since this has to be done in 4 places (tcp/ipc listener, socks connecter and open_socket) add an utility function in ip.cpp. Fixes #1442
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
/*
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Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ZMQ_IP_HPP_INCLUDED__
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#define __ZMQ_IP_HPP_INCLUDED__
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#include <string>
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#include "fd.hpp"
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namespace zmq
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{
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// Same as socket(2), but allows for transparent tweaking the options.
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fd_t open_socket (int domain_, int type_, int protocol_);
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// Sets the socket into non-blocking mode.
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void unblock_socket (fd_t s_);
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// Enable IPv4-mapping of addresses in case it is disabled by default.
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void enable_ipv4_mapping (fd_t s_);
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// Returns string representation of peer's address.
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// Socket sockfd_ must be connected. Returns true iff successful.
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int get_peer_ip_address (fd_t sockfd_, std::string &ip_addr_);
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// Sets the IP Type-Of-Service for the underlying socket
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void set_ip_type_of_service (fd_t s_, int iptos);
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// Sets the SO_NOSIGPIPE option for the underlying socket.
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// Return 0 on success, -1 if the connection has been closed by the peer
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int set_nosigpipe (fd_t s_);
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}
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#endif
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