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
4.2 KiB
C++
138 lines
4.2 KiB
C++
//===-- UDPSocket.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 "lldb/Host/common/UDPSocket.h"
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#include "lldb/Host/Config.h"
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#include "lldb/Utility/Log.h"
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#ifndef LLDB_DISABLE_POSIX
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#endif
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#include <memory>
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using namespace lldb;
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using namespace lldb_private;
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namespace {
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const int kDomain = AF_INET;
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const int kType = SOCK_DGRAM;
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static const char *g_not_supported_error = "Not supported";
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}
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UDPSocket::UDPSocket(NativeSocket socket) : Socket(socket, ProtocolUdp, true) {}
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UDPSocket::UDPSocket(bool child_processes_inherit, Error &error)
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: UDPSocket(
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CreateSocket(kDomain, kType, 0, child_processes_inherit, error)) {}
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size_t UDPSocket::Send(const void *buf, const size_t num_bytes) {
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return ::sendto(m_socket, static_cast<const char *>(buf), num_bytes, 0,
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m_sockaddr, m_sockaddr.GetLength());
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}
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Error UDPSocket::Connect(llvm::StringRef name) {
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return Error("%s", g_not_supported_error);
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}
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Error UDPSocket::Listen(llvm::StringRef name, int backlog) {
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return Error("%s", g_not_supported_error);
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}
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Error UDPSocket::Accept(llvm::StringRef name, bool child_processes_inherit,
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Socket *&socket) {
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return Error("%s", g_not_supported_error);
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}
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Error UDPSocket::Connect(llvm::StringRef name, bool child_processes_inherit,
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Socket *&socket) {
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std::unique_ptr<UDPSocket> final_socket;
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Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_CONNECTION));
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if (log)
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log->Printf("UDPSocket::%s (host/port = %s)", __FUNCTION__, name.data());
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Error error;
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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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if (!DecodeHostAndPort(name, host_str, port_str, port, &error))
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return error;
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// At this point we have setup the receive port, now we need to
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// setup the UDP send socket
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struct addrinfo hints;
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struct addrinfo *service_info_list = nullptr;
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::memset(&hints, 0, sizeof(hints));
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hints.ai_family = kDomain;
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hints.ai_socktype = kType;
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int err = ::getaddrinfo(host_str.c_str(), port_str.c_str(), &hints,
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&service_info_list);
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if (err != 0) {
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error.SetErrorStringWithFormat(
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#if defined(_MSC_VER) && defined(UNICODE)
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"getaddrinfo(%s, %s, &hints, &info) returned error %i (%S)",
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#else
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"getaddrinfo(%s, %s, &hints, &info) returned error %i (%s)",
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#endif
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host_str.c_str(), port_str.c_str(), err, gai_strerror(err));
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return error;
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}
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for (struct addrinfo *service_info_ptr = service_info_list;
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service_info_ptr != nullptr;
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service_info_ptr = service_info_ptr->ai_next) {
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auto send_fd = CreateSocket(
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service_info_ptr->ai_family, service_info_ptr->ai_socktype,
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service_info_ptr->ai_protocol, child_processes_inherit, error);
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if (error.Success()) {
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final_socket.reset(new UDPSocket(send_fd));
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final_socket->m_sockaddr = service_info_ptr;
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break;
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} else
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continue;
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}
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::freeaddrinfo(service_info_list);
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if (!final_socket)
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return error;
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SocketAddress bind_addr;
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// Only bind to the loopback address if we are expecting a connection from
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// localhost to avoid any firewall issues.
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const bool bind_addr_success = (host_str == "127.0.0.1" || host_str == "localhost")
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? bind_addr.SetToLocalhost(kDomain, port)
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: bind_addr.SetToAnyAddress(kDomain, port);
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if (!bind_addr_success) {
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error.SetErrorString("Failed to get hostspec to bind for");
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return error;
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}
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bind_addr.SetPort(0); // Let the source port # be determined dynamically
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err = ::bind(final_socket->GetNativeSocket(), bind_addr, bind_addr.GetLength());
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struct sockaddr_in source_info;
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socklen_t address_len = sizeof (struct sockaddr_in);
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err = ::getsockname(final_socket->GetNativeSocket(), (struct sockaddr *) &source_info, &address_len);
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socket = final_socket.release();
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error.Clear();
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return error;
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}
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