2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
137 lines
4.2 KiB
C++
137 lines
4.2 KiB
C++
//===-- UDPSocket.cpp -------------------------------------------*- C++ -*-===//
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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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#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(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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Status 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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Status 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 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(_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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