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