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llvm-project/lldb/source/Core/ConnectionFileDescriptor.cpp

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//===-- ConnectionFileDescriptor.cpp ----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#if defined(__APPLE__)
// Enable this special support for Apple builds where we can have unlimited
// select bounds. We tried switching to poll() and kqueue and we were panicing
// the kernel, so we have to stick with select for now.
#define _DARWIN_UNLIMITED_SELECT
#endif
#include "lldb/Core/ConnectionFileDescriptor.h"
#include "lldb/Host/Config.h"
#include "lldb/Host/IOObject.h"
#include "lldb/Host/SocketAddress.h"
#include "lldb/Host/Socket.h"
// C Includes
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#ifndef LLDB_DISABLE_POSIX
#include <termios.h>
#endif
// C++ Includes
// Other libraries and framework includes
#include "llvm/Support/ErrorHandling.h"
#if defined(__APPLE__)
#include "llvm/ADT/SmallVector.h"
#endif
// Project includes
#include "lldb/lldb-private-log.h"
#include "lldb/Core/Communication.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Timer.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/Socket.h"
#include "lldb/Interpreter/Args.h"
using namespace lldb;
using namespace lldb_private;
ConnectionFileDescriptor::ConnectionFileDescriptor () :
Connection(),
m_pipe (),
m_mutex (Mutex::eMutexTypeRecursive),
m_shutting_down (false),
m_waiting_for_accept (false)
{
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION | LIBLLDB_LOG_OBJECT));
if (log)
log->Printf ("%p ConnectionFileDescriptor::ConnectionFileDescriptor ()",
static_cast<void*>(this));
}
ConnectionFileDescriptor::ConnectionFileDescriptor (int fd, bool owns_fd) :
Connection(),
m_pipe (),
m_mutex (Mutex::eMutexTypeRecursive),
m_shutting_down (false),
m_waiting_for_accept (false)
{
m_write_sp.reset(new File(fd, owns_fd));
m_read_sp.reset(new File(fd, false));
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION | LIBLLDB_LOG_OBJECT));
if (log)
log->Printf ("%p ConnectionFileDescriptor::ConnectionFileDescriptor (fd = %i, owns_fd = %i)",
static_cast<void*>(this), fd, owns_fd);
OpenCommandPipe ();
}
ConnectionFileDescriptor::~ConnectionFileDescriptor ()
{
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION | LIBLLDB_LOG_OBJECT));
if (log)
log->Printf ("%p ConnectionFileDescriptor::~ConnectionFileDescriptor ()",
static_cast<void*>(this));
Disconnect (NULL);
CloseCommandPipe ();
}
void
ConnectionFileDescriptor::OpenCommandPipe ()
{
CloseCommandPipe();
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION));
// Make the command file descriptor here:
if (!m_pipe.Open())
{
if (log)
log->Printf ("%p ConnectionFileDescriptor::OpenCommandPipe () - could not make pipe: %s",
static_cast<void*>(this), strerror(errno));
}
else
{
if (log)
log->Printf ("%p ConnectionFileDescriptor::OpenCommandPipe() - success readfd=%d writefd=%d",
static_cast<void*>(this),
m_pipe.GetReadFileDescriptor(),
m_pipe.GetWriteFileDescriptor());
}
}
void
ConnectionFileDescriptor::CloseCommandPipe ()
{
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION));
if (log)
log->Printf ("%p ConnectionFileDescriptor::CloseCommandPipe()",
static_cast<void*>(this));
m_pipe.Close();
}
bool
ConnectionFileDescriptor::IsConnected () const
{
return (m_read_sp && m_read_sp->IsValid()) || (m_write_sp && m_write_sp->IsValid());
}
ConnectionStatus
ConnectionFileDescriptor::Connect (const char *s, Error *error_ptr)
{
Mutex::Locker locker (m_mutex);
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION));
if (log)
log->Printf ("%p ConnectionFileDescriptor::Connect (url = '%s')",
static_cast<void*>(this), s);
OpenCommandPipe();
if (s && s[0])
{
if (strstr(s, "listen://") == s)
{
// listen://HOST:PORT
return SocketListen (s + strlen("listen://"), error_ptr);
}
else if (strstr(s, "accept://") == s)
{
// unix://SOCKNAME
return NamedSocketAccept (s + strlen("accept://"), error_ptr);
}
else if (strstr(s, "unix-accept://") == s)
{
// unix://SOCKNAME
return NamedSocketAccept (s + strlen("unix-accept://"), error_ptr);
}
else if (strstr(s, "connect://") == s)
{
return ConnectTCP (s + strlen("connect://"), error_ptr);
}
else if (strstr(s, "tcp-connect://") == s)
{
return ConnectTCP (s + strlen("tcp-connect://"), error_ptr);
}
else if (strstr(s, "udp://") == s)
{
return ConnectUDP (s + strlen("udp://"), error_ptr);
}
#ifndef LLDB_DISABLE_POSIX
else if (strstr(s, "fd://") == s)
{
if (error_ptr)
error_ptr->SetErrorStringWithFormat ("Protocol is not supported on non-posix hosts '%s'", s);
return eConnectionStatusError;
// Just passing a native file descriptor within this current process
// that is already opened (possibly from a service or other source).
s += strlen ("fd://");
bool success = false;
int fd = Args::StringToSInt32 (s, -1, 0, &success);
if (success)
{
// We have what looks to be a valid file descriptor, but we
// should make sure it is. We currently are doing this by trying to
// get the flags from the file descriptor and making sure it
// isn't a bad fd.
errno = 0;
int flags = ::fcntl (fd, F_GETFL, 0);
if (flags == -1 || errno == EBADF)
{
if (error_ptr)
error_ptr->SetErrorStringWithFormat ("stale file descriptor: %s", s);
m_read_sp.reset();
m_write_sp.reset();
return eConnectionStatusError;
}
else
{
// Don't take ownership of a file descriptor that gets passed
// to us since someone else opened the file descriptor and
// handed it to us.
// TODO: Since are using a URL to open connection we should
// eventually parse options using the web standard where we
// have "fd://123?opt1=value;opt2=value" and we can have an
// option be "owns=1" or "owns=0" or something like this to
// allow us to specify this. For now, we assume we must
// assume we don't own it.
std::unique_ptr<Socket> tcp_socket;
tcp_socket.reset(new Socket(fd, Socket::ProtocolTcp, false));
// Try and get a socket option from this file descriptor to
// see if this is a socket and set m_is_socket accordingly.
int resuse;
bool is_socket = !!tcp_socket->GetOption(SOL_SOCKET, SO_REUSEADDR, resuse);
if (is_socket)
{
m_read_sp = std::move(tcp_socket);
m_write_sp = m_read_sp;
}
else
{
m_read_sp.reset(new File(fd, false));
m_write_sp.reset(new File(fd, false));
}
return eConnectionStatusSuccess;
}
}
if (error_ptr)
error_ptr->SetErrorStringWithFormat ("invalid file descriptor: \"fd://%s\"", s);
m_read_sp.reset();
m_write_sp.reset();
return eConnectionStatusError;
}
else if (strstr(s, "file://") == s)
{
// file:///PATH
const char *path = s + strlen("file://");
int fd = -1;
do
{
fd = ::open (path, O_RDWR);
} while (fd == -1 && errno == EINTR);
if (fd == -1)
{
if (error_ptr)
error_ptr->SetErrorToErrno();
return eConnectionStatusError;
}
if (::isatty(fd))
{
// Set up serial terminal emulation
struct termios options;
::tcgetattr (fd, &options);
// Set port speed to maximum
::cfsetospeed (&options, B115200);
::cfsetispeed (&options, B115200);
// Raw input, disable echo and signals
options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
// Make sure only one character is needed to return from a read
options.c_cc[VMIN] = 1;
options.c_cc[VTIME] = 0;
::tcsetattr (fd, TCSANOW, &options);
}
int flags = ::fcntl (fd, F_GETFL, 0);
if (flags >= 0)
{
if ((flags & O_NONBLOCK) == 0)
{
flags |= O_NONBLOCK;
::fcntl (fd, F_SETFL, flags);
}
}
m_read_sp.reset(new File(fd, true));
m_write_sp.reset(new File(fd, false));
return eConnectionStatusSuccess;
}
#endif
if (error_ptr)
error_ptr->SetErrorStringWithFormat ("unsupported connection URL: '%s'", s);
return eConnectionStatusError;
}
if (error_ptr)
error_ptr->SetErrorString("invalid connect arguments");
return eConnectionStatusError;
}
bool
ConnectionFileDescriptor::InterruptRead()
{
return m_pipe.Write("i", 1) == 1;
}
ConnectionStatus
ConnectionFileDescriptor::Disconnect (Error *error_ptr)
{
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION));
if (log)
log->Printf ("%p ConnectionFileDescriptor::Disconnect ()",
static_cast<void*>(this));
ConnectionStatus status = eConnectionStatusSuccess;
if (!IsConnected())
{
if (log)
log->Printf ("%p ConnectionFileDescriptor::Disconnect(): Nothing to disconnect",
static_cast<void*>(this));
return eConnectionStatusSuccess;
}
if (m_read_sp && m_read_sp->IsValid() && m_read_sp->GetFdType() == IOObject::eFDTypeSocket)
static_cast<Socket&>(*m_read_sp).PreDisconnect();
// Try to get the ConnectionFileDescriptor's mutex. If we fail, that is quite likely
// because somebody is doing a blocking read on our file descriptor. If that's the case,
// then send the "q" char to the command file channel so the read will wake up and the connection
// will then know to shut down.
m_shutting_down = true;
Mutex::Locker locker;
bool got_lock = locker.TryLock (m_mutex);
if (!got_lock)
{
if (m_pipe.WriteDescriptorIsValid())
{
int result;
result = m_pipe.Write("q", 1) == 1;
if (log)
log->Printf ("%p ConnectionFileDescriptor::Disconnect(): Couldn't get the lock, sent 'q' to %d, result = %d.",
static_cast<void*>(this), m_pipe.GetWriteFileDescriptor(), result);
}
else if (log)
{
log->Printf ("%p ConnectionFileDescriptor::Disconnect(): Couldn't get the lock, but no command pipe is available.",
static_cast<void*>(this));
}
locker.Lock (m_mutex);
}
Error error = m_read_sp->Close();
Error error2 = m_write_sp->Close();
if (error.Fail() || error2.Fail())
status = eConnectionStatusError;
if (error_ptr)
*error_ptr = error.Fail() ? error : error2;
m_shutting_down = false;
return status;
}
size_t
ConnectionFileDescriptor::Read (void *dst,
size_t dst_len,
uint32_t timeout_usec,
ConnectionStatus &status,
Error *error_ptr)
{
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION));
Mutex::Locker locker;
bool got_lock = locker.TryLock (m_mutex);
if (!got_lock)
{
if (log)
log->Printf ("%p ConnectionFileDescriptor::Read () failed to get the connection lock.",
static_cast<void*>(this));
if (error_ptr)
error_ptr->SetErrorString ("failed to get the connection lock for read.");
status = eConnectionStatusTimedOut;
return 0;
}
else if (m_shutting_down)
return eConnectionStatusError;
status = BytesAvailable (timeout_usec, error_ptr);
if (status != eConnectionStatusSuccess)
return 0;
Error error;
size_t bytes_read = dst_len;
error = m_read_sp->Read(dst, bytes_read);
if (log)
{
log->Printf("%p ConnectionFileDescriptor::Read() fd = %" PRIu64 ", dst = %p, dst_len = %" PRIu64 ") => %" PRIu64 ", error = %s",
static_cast<void*>(this),
static_cast<uint64_t>(m_read_sp->GetWaitableHandle()),
static_cast<void*>(dst),
static_cast<uint64_t>(dst_len),
static_cast<uint64_t>(bytes_read),
error.AsCString());
}
if (bytes_read == 0)
{
error.Clear(); // End-of-file. Do not automatically close; pass along for the end-of-file handlers.
status = eConnectionStatusEndOfFile;
}
if (error_ptr)
*error_ptr = error;
if (error.Fail())
{
uint32_t error_value = error.GetError();
switch (error_value)
{
case EAGAIN: // The file was marked for non-blocking I/O, and no data were ready to be read.
if (m_read_sp->GetFdType() == IOObject::eFDTypeSocket)
status = eConnectionStatusTimedOut;
else
status = eConnectionStatusSuccess;
return 0;
case EFAULT: // Buf points outside the allocated address space.
case EINTR: // A read from a slow device was interrupted before any data arrived by the delivery of a signal.
case EINVAL: // The pointer associated with fildes was negative.
case EIO: // An I/O error occurred while reading from the file system.
// The process group is orphaned.
// The file is a regular file, nbyte is greater than 0,
// the starting position is before the end-of-file, and
// the starting position is greater than or equal to the
// offset maximum established for the open file
// descriptor associated with fildes.
case EISDIR: // An attempt is made to read a directory.
case ENOBUFS: // An attempt to allocate a memory buffer fails.
case ENOMEM: // Insufficient memory is available.
status = eConnectionStatusError;
break; // Break to close....
case ENOENT: // no such file or directory
case EBADF: // fildes is not a valid file or socket descriptor open for reading.
case ENXIO: // An action is requested of a device that does not exist..
// A requested action cannot be performed by the device.
case ECONNRESET:// The connection is closed by the peer during a read attempt on a socket.
case ENOTCONN: // A read is attempted on an unconnected socket.
status = eConnectionStatusLostConnection;
break; // Break to close....
case ETIMEDOUT: // A transmission timeout occurs during a read attempt on a socket.
status = eConnectionStatusTimedOut;
return 0;
default:
if (log)
log->Printf("%p ConnectionFileDescriptor::Read (), unexpected error: %s",
static_cast<void*>(this), strerror(error_value));
status = eConnectionStatusError;
break; // Break to close....
}
return 0;
}
return bytes_read;
}
size_t
ConnectionFileDescriptor::Write (const void *src, size_t src_len, ConnectionStatus &status, Error *error_ptr)
{
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_CONNECTION));
if (log)
log->Printf ("%p ConnectionFileDescriptor::Write (src = %p, src_len = %" PRIu64 ")",
static_cast<void*>(this), static_cast<const void*>(src),
static_cast<uint64_t>(src_len));
if (!IsConnected ())
{
if (error_ptr)
error_ptr->SetErrorString("not connected");
status = eConnectionStatusNoConnection;
return 0;
}
Error error;
size_t bytes_sent = src_len;
error = m_write_sp->Write(src, bytes_sent);
if (log)
{
log->Printf ("%p ConnectionFileDescriptor::Write(fd = %" PRIu64 ", src = %p, src_len = %" PRIu64 ") => %" PRIu64 " (error = %s)",
static_cast<void*>(this),
static_cast<uint64_t>(m_write_sp->GetWaitableHandle()),
static_cast<const void*>(src),
static_cast<uint64_t>(src_len),
static_cast<uint64_t>(bytes_sent),
error.AsCString());
}
if (error_ptr)
*error_ptr = error;
if (error.Fail())
{
switch (error.GetError())
{
case EAGAIN:
case EINTR:
status = eConnectionStatusSuccess;
return 0;
case ECONNRESET:// The connection is closed by the peer during a read attempt on a socket.
case ENOTCONN: // A read is attempted on an unconnected socket.
status = eConnectionStatusLostConnection;
break; // Break to close....
default:
status = eConnectionStatusError;
break; // Break to close....
}
return 0;
}
status = eConnectionStatusSuccess;
return bytes_sent;
}
// This ConnectionFileDescriptor::BytesAvailable() uses select().
//
// PROS:
// - select is consistent across most unix platforms
// - The Apple specific version allows for unlimited fds in the fd_sets by
// setting the _DARWIN_UNLIMITED_SELECT define prior to including the
// required header files.
// CONS:
// - on non-Apple platforms, only supports file descriptors up to FD_SETSIZE.
// This implementation will assert if it runs into that hard limit to let
// users know that another ConnectionFileDescriptor::BytesAvailable() should
// be used or a new version of ConnectionFileDescriptor::BytesAvailable()
// should be written for the system that is running into the limitations.
#if defined(__APPLE__)
#define FD_SET_DATA(fds) fds.data()
#else
#define FD_SET_DATA(fds) &fds
#endif
ConnectionStatus
ConnectionFileDescriptor::BytesAvailable (uint32_t timeout_usec, Error *error_ptr)
{
// Don't need to take the mutex here separately since we are only called from Read. If we
// ever get used more generally we will need to lock here as well.
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_CONNECTION));
if (log)
log->Printf("%p ConnectionFileDescriptor::BytesAvailable (timeout_usec = %u)",
static_cast<void*>(this), timeout_usec);
struct timeval *tv_ptr;
struct timeval tv;
if (timeout_usec == UINT32_MAX)
{
// Inifinite wait...
tv_ptr = nullptr;
}
else
{
TimeValue time_value;
time_value.OffsetWithMicroSeconds (timeout_usec);
tv.tv_sec = time_value.seconds();
tv.tv_usec = time_value.microseconds();
tv_ptr = &tv;
}
// Make a copy of the file descriptors to make sure we don't
// have another thread change these values out from under us
// and cause problems in the loop below where like in FS_SET()
const IOObject::WaitableHandle handle = m_read_sp->GetWaitableHandle();
const int pipe_fd = m_pipe.GetReadFileDescriptor();
if (handle != IOObject::kInvalidHandleValue)
{
#if defined(_MSC_VER)
// select() won't accept pipes on Windows. The entire Windows codepath needs to be
// converted over to using WaitForMultipleObjects and event HANDLEs, but for now at least
// this will allow ::select() to not return an error.
const bool have_pipe_fd = false;
#else
const bool have_pipe_fd = pipe_fd >= 0;
#if !defined(__APPLE__)
assert (handle < FD_SETSIZE);
if (have_pipe_fd)
assert (pipe_fd < FD_SETSIZE);
#endif
#endif
while (handle == m_read_sp->GetWaitableHandle())
{
const int nfds = std::max<int>(handle, pipe_fd) + 1;
#if defined(__APPLE__)
llvm::SmallVector<fd_set, 1> read_fds;
read_fds.resize((nfds/FD_SETSIZE) + 1);
for (size_t i=0; i<read_fds.size(); ++i)
FD_ZERO (&read_fds[i]);
// FD_SET doesn't bounds check, it just happily walks off the end
// but we have taken care of making the extra storage with our
// SmallVector of fd_set objects
#else
fd_set read_fds;
FD_ZERO (&read_fds);
#endif
FD_SET (handle, FD_SET_DATA(read_fds));
if (have_pipe_fd)
FD_SET (pipe_fd, FD_SET_DATA(read_fds));
Error error;
if (log)
{
if (have_pipe_fd)
log->Printf("%p ConnectionFileDescriptor::BytesAvailable() ::select (nfds=%i, fds={%i, %i}, NULL, NULL, timeout=%p)...",
static_cast<void*>(this), nfds, handle, pipe_fd,
static_cast<void*>(tv_ptr));
else
log->Printf("%p ConnectionFileDescriptor::BytesAvailable() ::select (nfds=%i, fds={%i}, NULL, NULL, timeout=%p)...",
static_cast<void*>(this), nfds, handle,
static_cast<void*>(tv_ptr));
}
const int num_set_fds = ::select (nfds, FD_SET_DATA(read_fds), NULL, NULL, tv_ptr);
if (num_set_fds < 0)
error.SetErrorToErrno();
else
error.Clear();
if (log)
{
if (have_pipe_fd)
log->Printf("%p ConnectionFileDescriptor::BytesAvailable() ::select (nfds=%i, fds={%i, %i}, NULL, NULL, timeout=%p) => %d, error = %s",
static_cast<void*>(this), nfds, handle,
pipe_fd, static_cast<void*>(tv_ptr), num_set_fds,
error.AsCString());
else
log->Printf("%p ConnectionFileDescriptor::BytesAvailable() ::select (nfds=%i, fds={%i}, NULL, NULL, timeout=%p) => %d, error = %s",
static_cast<void*>(this), nfds, handle,
static_cast<void*>(tv_ptr), num_set_fds,
error.AsCString());
}
if (error_ptr)
*error_ptr = error;
if (error.Fail())
{
switch (error.GetError())
{
case EBADF: // One of the descriptor sets specified an invalid descriptor.
return eConnectionStatusLostConnection;
case EINVAL: // The specified time limit is invalid. One of its components is negative or too large.
default: // Other unknown error
return eConnectionStatusError;
case EAGAIN: // The kernel was (perhaps temporarily) unable to
// allocate the requested number of file descriptors,
// or we have non-blocking IO
case EINTR: // A signal was delivered before the time limit
// expired and before any of the selected events
// occurred.
break; // Lets keep reading to until we timeout
}
}
else if (num_set_fds == 0)
{
return eConnectionStatusTimedOut;
}
else if (num_set_fds > 0)
{
if (FD_ISSET(handle, FD_SET_DATA(read_fds)))
return eConnectionStatusSuccess;
if (have_pipe_fd && FD_ISSET(pipe_fd, FD_SET_DATA(read_fds)))
{
// We got a command to exit. Read the data from that pipe:
char buffer[16];
ssize_t bytes_read;
do
{
bytes_read = ::read (pipe_fd, buffer, sizeof(buffer));
} while (bytes_read < 0 && errno == EINTR);
switch (buffer[0])
{
case 'q':
if (log)
log->Printf("%p ConnectionFileDescriptor::BytesAvailable() got data: %*s from the command channel.",
static_cast<void*>(this),
static_cast<int>(bytes_read), buffer);
return eConnectionStatusEndOfFile;
case 'i':
// Interrupt the current read
return eConnectionStatusInterrupted;
}
}
}
}
}
if (error_ptr)
error_ptr->SetErrorString("not connected");
return eConnectionStatusLostConnection;
}
ConnectionStatus
ConnectionFileDescriptor::NamedSocketAccept (const char *socket_name, Error *error_ptr)
{
Socket* socket = nullptr;
Error error = Socket::UnixDomainAccept(socket_name, socket);
if (error_ptr)
*error_ptr = error;
m_write_sp.reset(socket);
m_read_sp = m_write_sp;
return (error.Success()) ? eConnectionStatusSuccess : eConnectionStatusError;
}
ConnectionStatus
ConnectionFileDescriptor::NamedSocketConnect (const char *socket_name, Error *error_ptr)
{
Socket* socket = nullptr;
Error error = Socket::UnixDomainConnect(socket_name, socket);
if (error_ptr)
*error_ptr = error;
m_write_sp.reset(socket);
m_read_sp = m_write_sp;
return (error.Success()) ? eConnectionStatusSuccess : eConnectionStatusError;
}
ConnectionStatus
ConnectionFileDescriptor::SocketListen(const char *s, Error *error_ptr)
{
m_port_predicate.SetValue(0, eBroadcastNever);
Socket* socket = nullptr;
m_waiting_for_accept = true;
Error error = Socket::TcpListen(s, socket, &m_port_predicate);
if (error_ptr)
*error_ptr = error;
if (error.Fail())
return eConnectionStatusError;
std::unique_ptr<Socket> listening_socket_up;
listening_socket_up.reset(socket);
socket = nullptr;
error = listening_socket_up->BlockingAccept(s, socket);
listening_socket_up.reset();
if (error_ptr)
*error_ptr = error;
if (error.Fail())
return eConnectionStatusError;
m_write_sp.reset(socket);
m_read_sp = m_write_sp;
return (error.Success()) ? eConnectionStatusSuccess : eConnectionStatusError;
}
ConnectionStatus
ConnectionFileDescriptor::ConnectTCP(const char *s, Error *error_ptr)
{
Socket* socket = nullptr;
Error error = Socket::TcpConnect(s, socket);
if (error_ptr)
*error_ptr = error;
m_write_sp.reset(socket);
m_read_sp = m_write_sp;
return (error.Success()) ? eConnectionStatusSuccess : eConnectionStatusError;
}
ConnectionStatus
ConnectionFileDescriptor::ConnectUDP(const char *s, Error *error_ptr)
{
Socket* send_socket = nullptr;
Socket* recv_socket = nullptr;
Error error = Socket::UdpConnect(s, send_socket, recv_socket);
if (error_ptr)
*error_ptr = error;
m_write_sp.reset(send_socket);
m_read_sp.reset(recv_socket);
return (error.Success()) ? eConnectionStatusSuccess : eConnectionStatusError;
}
uint16_t ConnectionFileDescriptor::GetListeningPort(uint32_t timeout_sec)
{
uint16_t bound_port = 0;
if (timeout_sec == UINT32_MAX)
m_port_predicate.WaitForValueNotEqualTo (0, bound_port);
else
{
TimeValue timeout = TimeValue::Now();
timeout.OffsetWithSeconds(timeout_sec);
m_port_predicate.WaitForValueNotEqualTo (0, bound_port, &timeout);
}
return bound_port;
}
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