forked from lthn/blockchain
205 lines
No EOL
7.6 KiB
C++
205 lines
No EOL
7.6 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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#include "string_tools.h"
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namespace epee
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{
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namespace levin
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{
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template<typename transport_t>
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bool levin_client_impl_t<transport_t>::connect(u_long ip, int port, unsigned int timeout, const std::string& bind_ip)
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{
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return m_transport.connect(string_tools::get_ip_string_from_int32(ip), port, timeout, timeout, bind_ip);
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}
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//------------------------------------------------------------------------------
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template<typename transport_t>
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bool levin_client_impl_t<transport_t>::connect(const std::string& addr, int port, unsigned int timeout, const std::string& bind_ip)
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{
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return m_transport.connect(addr, port, timeout, timeout, bind_ip);
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}
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//------------------------------------------------------------------------------
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template<typename transport_t>
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bool levin_client_impl_t<transport_t>::is_connected()
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{
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return m_transport.is_connected();
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}
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//------------------------------------------------------------------------------
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template<typename transport_t>
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bool levin_client_impl_t<transport_t>::disconnect()
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{
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return m_transport.disconnect();
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}
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//------------------------------------------------------------------------------
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template<typename transport_t>
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levin_client_impl_t<transport_t>::levin_client_impl_t()
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{
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}
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//------------------------------------------------------------------------------
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template<typename transport_t>
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levin_client_impl_t<transport_t>::~levin_client_impl_t()
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{
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disconnect();
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}
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//------------------------------------------------------------------------------
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template<typename transport_t>
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int levin_client_impl_t<transport_t>::invoke(int command, const std::string& in_buff, std::string& buff_out)
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{
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if (!is_connected())
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return -1;
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bucket_head head = { 0 };
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head.m_signature = LEVIN_SIGNATURE;
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head.m_cb = in_buff.size();
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head.m_have_to_return_data = true;
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head.m_command = command;
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if (!m_transport.send(&head, sizeof(head)))
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return -1;
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if (!m_transport.send(in_buff))
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return -1;
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std::string local_buff;
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if (!m_transport.recv_n(local_buff, sizeof(bucket_head)))
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return -1;
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head = *(bucket_head*)local_buff.data();
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if (head.m_signature != LEVIN_SIGNATURE)
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{
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LOG_PRINT_L0("Signature missmatch in response");
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return -1;
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}
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if (!m_transport.recv_n(buff_out, head.m_cb))
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return -1;
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return head.m_return_code;
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}
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//------------------------------------------------------------------------------
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template<typename transport_t>
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int levin_client_impl_t<transport_t>::notify(int command, const std::string& in_buff)
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{
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if (!this->is_connected())
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return -1;
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bucket_head head = { 0 };
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head.m_signature = LEVIN_SIGNATURE;
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head.m_cb = in_buff.size();
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head.m_have_to_return_data = false;
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head.m_command = command;
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if (!m_transport.send((const char*)&head, sizeof(head)))
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return -1;
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if (!m_transport.send(in_buff))
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return -1;
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return 1;
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}
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//------------------------------------------------------------------------------
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template<typename transport_t>
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int levin_client_impl2<transport_t>::invoke(int command, const std::string& in_buff, std::string& buff_out)
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{
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if (!this->is_connected())
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return -1;
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bucket_head2 head = { 0 };
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head.m_signature = LEVIN_SIGNATURE;
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head.m_cb = in_buff.size();
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head.m_have_to_return_data = true;
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head.m_command = static_cast<uint32_t>(command);
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head.m_protocol_version = LEVIN_PROTOCOL_VER_1;
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head.m_flags = LEVIN_PACKET_REQUEST;
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if (!this->m_transport.send(&head, sizeof(head)))
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return -1;
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if (!this->m_transport.send(in_buff))
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return -1;
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//Since other side of connection could be running by async server,
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//we can receive some unexpected notify(forwarded broadcast notifications for example).
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//let's ignore every notify in the channel until we get invoke response
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std::string local_buff;
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while (true)
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{
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if (!this->m_transport.recv_n(local_buff, sizeof(bucket_head2)))
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return LEVIN_ERROR_NET_ERROR;
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head = *(bucket_head2*)local_buff.data();
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if (head.m_signature != LEVIN_SIGNATURE)
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{
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LOG_PRINT_L0("Signature missmatch in response");
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return LEVIN_ERROR_SIGNATURE_MISMATCH;
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}
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if (!this->m_transport.recv_n(buff_out, head.m_cb))
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return LEVIN_ERROR_NET_ERROR;
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//now check if this is response to invoke (and extra validate if it's response to this(!) invoke)
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if (head.m_flags&LEVIN_PACKET_RESPONSE)
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{
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//we got response, extra validate if its response to our request
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CHECK_AND_ASSERT_MES(head.m_command == static_cast<uint32_t>(command), LEVIN_ERROR_PROTOCOL_INCONSISTENT, "command id missmatch in response: " << head.m_command << ", expected: " << command);
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return head.m_return_code;
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}
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}
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//never comes here
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return LEVIN_ERROR_INTERNAL;
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}
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//------------------------------------------------------------------------------
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template<typename transport_t>
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int levin_client_impl2<transport_t>::notify(int command, const std::string& in_buff)
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{
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if (!this->is_connected())
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return -1;
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bucket_head2 head = { 0 };
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head.m_signature = LEVIN_SIGNATURE;
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head.m_cb = in_buff.size();
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head.m_have_to_return_data = false;
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head.m_command = command;
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head.m_protocol_version = LEVIN_PROTOCOL_VER_1;
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head.m_flags = LEVIN_PACKET_REQUEST;
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if (!this->m_transport.send((const char*)&head, sizeof(head)))
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return -1;
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if (!this->m_transport.send(in_buff))
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return -1;
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return 1;
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}
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}
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}
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//------------------------------------------------------------------------------
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