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//===-- Acceptor.cpp --------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Acceptor.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/ScopedPrinter.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Host/ConnectionFileDescriptor.h"
#include "lldb/Host/common/TCPSocket.h"
#include "Utility/UriParser.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::lldb_server;
using namespace llvm;
namespace {
struct SocketScheme
{
const char* m_scheme;
const Socket::SocketProtocol m_protocol;
};
SocketScheme socket_schemes[] = {
{"tcp", Socket::ProtocolTcp},
{"udp", Socket::ProtocolUdp},
{"unix", Socket::ProtocolUnixDomain},
{"unix-abstract", Socket::ProtocolUnixAbstract},
};
bool
FindProtocolByScheme(const char* scheme, Socket::SocketProtocol& protocol)
{
for (auto s: socket_schemes)
{
if (!strcmp(s.m_scheme, scheme))
{
protocol = s.m_protocol;
return true;
}
}
return false;
}
const char*
FindSchemeByProtocol(const Socket::SocketProtocol protocol)
{
for (auto s: socket_schemes)
{
if (s.m_protocol == protocol)
return s.m_scheme;
}
return nullptr;
}
}
Error
Acceptor::Listen(int backlog)
{
return m_listener_socket_up->Listen(StringRef(m_name.c_str()),
backlog);
}
Error
Acceptor::Accept(const bool child_processes_inherit, Connection *&conn)
{
Socket* conn_socket = nullptr;
auto error = m_listener_socket_up->Accept(StringRef(m_name.c_str()),
child_processes_inherit,
conn_socket);
if (error.Success())
conn = new ConnectionFileDescriptor(conn_socket);
return error;
}
Socket::SocketProtocol
Acceptor::GetSocketProtocol() const
{
return m_listener_socket_up->GetSocketProtocol();
}
const char*
Acceptor::GetSocketScheme() const
{
return FindSchemeByProtocol(GetSocketProtocol());
}
std::string
Acceptor::GetLocalSocketId() const
{
return m_local_socket_id();
}
std::unique_ptr<Acceptor>
Acceptor::Create(StringRef name, const bool child_processes_inherit, Error &error)
{
error.Clear();
Socket::SocketProtocol socket_protocol = Socket::ProtocolUnixDomain;
int port;
std::string scheme, host, path;
// Try to match socket name as URL - e.g., tcp://localhost:5555
if (UriParser::Parse(name.str(), scheme, host, port, path))
{
if (!FindProtocolByScheme(scheme.c_str(), socket_protocol))
error.SetErrorStringWithFormat("Unknown protocol scheme \"%s\"", scheme.c_str());
else
name = name.drop_front(scheme.size() + strlen("://"));
}
else
{
std::string host_str;
std::string port_str;
int32_t port = INT32_MIN;
// Try to match socket name as $host:port - e.g., localhost:5555
if (Socket::DecodeHostAndPort (name, host_str, port_str, port, nullptr))
socket_protocol = Socket::ProtocolTcp;
}
if (error.Fail())
return std::unique_ptr<Acceptor>();
std::unique_ptr<Socket> listener_socket_up = Socket::Create(
socket_protocol, child_processes_inherit, error);
LocalSocketIdFunc local_socket_id;
if (error.Success())
{
if (listener_socket_up->GetSocketProtocol() == Socket::ProtocolTcp)
{
TCPSocket* tcp_socket = static_cast<TCPSocket*>(listener_socket_up.get());
local_socket_id = [tcp_socket]() {
auto local_port = tcp_socket->GetLocalPortNumber();
return (local_port != 0) ? llvm::to_string(local_port) : "";
};
}
else
{
const std::string socket_name = name;
local_socket_id = [socket_name](){
return socket_name;
};
}
return std::unique_ptr<Acceptor>(
new Acceptor(std::move(listener_socket_up), name, local_socket_id));
}
return std::unique_ptr<Acceptor>();
}
Acceptor::Acceptor(std::unique_ptr<Socket> &&listener_socket,
StringRef name,
const LocalSocketIdFunc &local_socket_id)
: m_listener_socket_up(std::move(listener_socket)),
m_name(name.str()),
m_local_socket_id(local_socket_id)
{
}
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