107e694271
The break the linux bots (and probably any other machine which would run the test suite in a massively parallel way). The problem is that it can happen that we only successfully create an IPv6 listening socket (because the relevant IPv4 port is used by another process) and then the connecting side attempts to connect to the IPv4 port and fails. It's not very obvious how to fix this problem, so I am reverting this until we come up with a solution. llvm-svn: 300669
138 lines
4.3 KiB
C++
138 lines
4.3 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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Error 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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Error 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(
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StringRef(m_name), child_processes_inherit, 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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Error &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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