93c1b3caf0
.. and reduce the scope of others. They don't follow llvm coding standards (which say they should be used only when the same effect cannot be achieved with the static keyword), and they set a bad example.
141 lines
4.3 KiB
C++
141 lines
4.3 KiB
C++
//===-- UDPSocket.cpp -----------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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#if LLDB_ENABLE_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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static const int kDomain = AF_INET;
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static const int kType = SOCK_DGRAM;
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static const char *g_not_supported_error = "Not supported";
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UDPSocket::UDPSocket(NativeSocket socket) : Socket(ProtocolUdp, true, true) {
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m_socket = socket;
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}
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UDPSocket::UDPSocket(bool should_close, bool child_processes_inherit)
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: Socket(ProtocolUdp, should_close, child_processes_inherit) {}
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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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Status UDPSocket::Connect(llvm::StringRef name) {
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return Status("%s", g_not_supported_error);
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}
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Status UDPSocket::Listen(llvm::StringRef name, int backlog) {
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return Status("%s", g_not_supported_error);
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}
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Status UDPSocket::Accept(Socket *&socket) {
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return Status("%s", g_not_supported_error);
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}
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llvm::Expected<std::unique_ptr<UDPSocket>>
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UDPSocket::Connect(llvm::StringRef name, bool child_processes_inherit) {
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std::unique_ptr<UDPSocket> socket;
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Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_CONNECTION));
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LLDB_LOG(log, "host/port = {0}", name);
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Status error;
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std::string host_str;
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std::string port_str;
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uint16_t port;
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if (llvm::Error decode_error =
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DecodeHostAndPort(name, host_str, port_str, port))
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return std::move(decode_error);
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// At this point we have setup the receive port, now we need to setup the UDP
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// 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(_WIN32) && 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.ToError();
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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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socket.reset(new UDPSocket(send_fd));
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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 (!socket)
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return error.ToError();
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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.ToError();
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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(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(socket->GetNativeSocket(),
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(struct sockaddr *)&source_info, &address_len);
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return std::move(socket);
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}
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std::string UDPSocket::GetRemoteConnectionURI() const {
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if (m_socket != kInvalidSocketValue) {
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return std::string(llvm::formatv(
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"udp://[{0}]:{1}", m_sockaddr.GetIPAddress(), m_sockaddr.GetPort()));
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}
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return "";
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}
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