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multiprocess: Add IPC connectAddress and listenAddress methods

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Allow listening on and connecting to unix sockets.
This commit is contained in:
Russell Yanofsky
2018-08-23 13:42:31 -04:00
parent 4da20434d4
commit 955d4077aa
6 changed files with 181 additions and 1 deletions
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30
src/ipc/interfaces.cpp
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@@ -2,6 +2,7 @@
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <common/args.h>
#include <common/system.h>
#include <interfaces/init.h>
#include <interfaces/ipc.h>
@@ -56,6 +57,35 @@ public:
exit_status = EXIT_SUCCESS;
return true;
}
std::unique_ptr<interfaces::Init> connectAddress(std::string& address) override
{
if (address.empty() || address == "0") return nullptr;
int fd;
if (address == "auto") {
// Treat "auto" the same as "unix" except don't treat it an as error
// if the connection is not accepted. Just return null so the caller
// can work offline without a connection, or spawn a new
// bitcoin-node process and connect to it.
address = "unix";
try {
fd = m_process->connect(gArgs.GetDataDirNet(), "bitcoin-node", address);
} catch (const std::system_error& e) {
// If connection type is auto and socket path isn't accepting connections, or doesn't exist, catch the error and return null;
if (e.code() == std::errc::connection_refused || e.code() == std::errc::no_such_file_or_directory) {
return nullptr;
}
throw;
}
} else {
fd = m_process->connect(gArgs.GetDataDirNet(), "bitcoin-node", address);
}
return m_protocol->connect(fd, m_exe_name);
}
void listenAddress(std::string& address) override
{
int fd = m_process->bind(gArgs.GetDataDirNet(), m_exe_name, address);
m_protocol->listen(fd, m_exe_name, m_init);
}
void addCleanup(std::type_index type, void* iface, std::function<void()> cleanup) override
{
m_protocol->addCleanup(type, iface, std::move(cleanup));