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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/Core/Log.h"
#include "lldb/Host/Config.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;
const Error kNotSupported("Not supported");
}
UDPSocket::UDPSocket(NativeSocket socket)
: Socket(socket, ProtocolUdp, true)
{
}
UDPSocket::UDPSocket(bool child_processes_inherit, Error &error)
: UDPSocket(CreateSocket(kDomain, kType, 0, child_processes_inherit, error))
{
}
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_send_sockaddr,
m_send_sockaddr.GetLength());
}
Error
UDPSocket::Connect(llvm::StringRef name)
{
return kNotSupported;
}
Error
UDPSocket::Listen(llvm::StringRef name, int backlog)
{
return kNotSupported;
}
Error
UDPSocket::Accept(llvm::StringRef name, bool child_processes_inherit, Socket *&socket)
{
return kNotSupported;
}
Error
UDPSocket::Connect(llvm::StringRef name, bool child_processes_inherit, Socket *&send_socket, Socket *&recv_socket)
{
std::unique_ptr<UDPSocket> final_send_socket;
std::unique_ptr<UDPSocket> final_recv_socket;
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION));
if (log)
log->Printf ("UDPSocket::%s (host/port = %s)", __FUNCTION__, name.data());
Error 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;
// Setup the receiving end of the UDP connection on this localhost
// on port zero. After we bind to port zero we can read the port.
final_recv_socket.reset(new UDPSocket(child_processes_inherit, error));
if (error.Success())
{
// Socket was created, now lets bind to the requested port
SocketAddress addr;
addr.SetToAnyAddress (AF_INET, 0);
if (::bind (final_recv_socket->GetNativeSocket(), addr, addr.GetLength()) == -1)
{
// Bind failed...
SetLastError (error);
}
}
assert(error.Fail() == !(final_recv_socket && final_recv_socket->IsValid()));
if (error.Fail())
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("getaddrinfo(%s, %s, &hints, &info) returned error %i (%s)",
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)
{
auto send_fd = CreateSocket (service_info_ptr->ai_family,
service_info_ptr->ai_socktype,
service_info_ptr->ai_protocol,
child_processes_inherit,
error);
if (error.Success())
{
final_send_socket.reset(new UDPSocket(send_fd));
final_send_socket->m_send_sockaddr = service_info_ptr;
break;
}
else
continue;
}
:: freeaddrinfo (service_info_list);
if (!final_send_socket)
return error;
send_socket = final_send_socket.release();
recv_socket = final_recv_socket.release();
error.Clear();
return error;
}
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