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//===-- UDPSocket.cpp -------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Host/common/UDPSocket.h"
#include "lldb/Host/Config.h"
#include "lldb/Utility/Log.h"
#ifndef LLDB_DISABLE_POSIX
#include <arpa/inet.h>
#include <sys/socket.h>
#endif
#include <memory>
using namespace lldb;
using namespace lldb_private;
namespace {
const int kDomain = AF_INET;
const int kType = SOCK_DGRAM;
static const char *g_not_supported_error = "Not supported";
} // namespace
UDPSocket::UDPSocket(bool should_close, bool child_processes_inherit)
: Socket(ProtocolUdp, should_close, child_processes_inherit) {}
UDPSocket::UDPSocket(NativeSocket socket, const UDPSocket &listen_socket)
: Socket(ProtocolUdp, listen_socket.m_should_close_fd,
listen_socket.m_child_processes_inherit) {
m_socket = socket;
}
size_t UDPSocket::Send(const void *buf, const size_t num_bytes) {
return ::sendto(m_socket, static_cast<const char *>(buf), num_bytes, 0,
m_sockaddr, m_sockaddr.GetLength());
}
Error UDPSocket::Connect(llvm::StringRef name) {
Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_CONNECTION));
if (log)
log->Printf("UDPSocket::%s (host/port = %s)", __FUNCTION__, name.data());
Error error;
if (error.Fail())
return error;
std::string host_str;
std::string port_str;
int32_t port = INT32_MIN;
if (!DecodeHostAndPort(name, host_str, port_str, port, &error))
return error;
// At this point we have setup the receive port, now we need to
// setup the UDP send socket
struct addrinfo hints;
struct addrinfo *service_info_list = nullptr;
::memset(&hints, 0, sizeof(hints));
hints.ai_family = kDomain;
hints.ai_socktype = kType;
int err = ::getaddrinfo(host_str.c_str(), port_str.c_str(), &hints,
&service_info_list);
if (err != 0) {
error.SetErrorStringWithFormat(
#if defined(_MSC_VER) && defined(UNICODE)
"getaddrinfo(%s, %s, &hints, &info) returned error %i (%S)",
#else
"getaddrinfo(%s, %s, &hints, &info) returned error %i (%s)",
#endif
host_str.c_str(), port_str.c_str(), err, gai_strerror(err));
return error;
}
for (struct addrinfo *service_info_ptr = service_info_list;
service_info_ptr != nullptr;
service_info_ptr = service_info_ptr->ai_next) {
m_socket = Socket::CreateSocket(
service_info_ptr->ai_family, service_info_ptr->ai_socktype,
service_info_ptr->ai_protocol, m_child_processes_inherit, error);
if (error.Success()) {
m_sockaddr = service_info_ptr;
break;
} else
continue;
}
::freeaddrinfo(service_info_list);
if (IsValid())
return error;
SocketAddress bind_addr;
// Only bind to the loopback address if we are expecting a connection from
// localhost to avoid any firewall issues.
const bool bind_addr_success =
(host_str == "127.0.0.1" || host_str == "localhost")
? bind_addr.SetToLocalhost(kDomain, port)
: bind_addr.SetToAnyAddress(kDomain, port);
if (!bind_addr_success) {
error.SetErrorString("Failed to get hostspec to bind for");
return error;
}
bind_addr.SetPort(0); // Let the source port # be determined dynamically
err = ::bind(m_socket, bind_addr, bind_addr.GetLength());
error.Clear();
return error;
}
Error UDPSocket::Listen(llvm::StringRef name, int backlog) {
return Error("%s", g_not_supported_error);
}
Error UDPSocket::Accept(Socket *&socket) {
return Error("%s", g_not_supported_error);
}
Error UDPSocket::CreateSocket() {
Error error;
if (IsValid())
error = Close();
if (error.Fail())
return error;
m_socket =
Socket::CreateSocket(kDomain, kType, 0, m_child_processes_inherit, error);
return error;
}
Error UDPSocket::Connect(llvm::StringRef name, bool child_processes_inherit,
Socket *&socket) {
std::unique_ptr<UDPSocket> final_socket(
new UDPSocket(true, child_processes_inherit));
Error error = final_socket->Connect(name);
if (!error.Fail())
socket = final_socket.release();
return error;
}
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