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//===-- DomainSocket.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/posix/DomainSocket.h"
#include "lldb/Host/FileSystem.h"
#include <stddef.h>
#include <sys/socket.h>
#include <sys/un.h>
using namespace lldb;
using namespace lldb_private;
#ifdef __ANDROID__
// Android does not have SUN_LEN
#ifndef SUN_LEN
#define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) + strlen((ptr)->sun_path))
#endif
#endif // #ifdef __ANDROID__
namespace {
const int kDomain = AF_UNIX;
const int kType = SOCK_STREAM;
bool SetSockAddr(llvm::StringRef name,
const size_t name_offset,
sockaddr_un* saddr_un,
socklen_t& saddr_un_len)
{
if (name.size() + name_offset > sizeof(saddr_un->sun_path))
return false;
memset(saddr_un, 0, sizeof(*saddr_un));
saddr_un->sun_family = kDomain;
memcpy(saddr_un->sun_path + name_offset, name.data(), name.size());
// For domain sockets we can use SUN_LEN in order to calculate size of
// sockaddr_un, but for abstract sockets we have to calculate size manually
// because of leading null symbol.
if (name_offset == 0)
saddr_un_len = SUN_LEN(saddr_un);
else
saddr_un_len = offsetof(struct sockaddr_un, sun_path) + name_offset + name.size();
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__)
saddr_un->sun_len = saddr_un_len;
#endif
return true;
}
}
DomainSocket::DomainSocket(NativeSocket socket)
: Socket(socket, ProtocolUnixDomain, true)
{
}
DomainSocket::DomainSocket(bool child_processes_inherit, Error &error)
: DomainSocket(CreateSocket(kDomain, kType, 0, child_processes_inherit, error))
{
}
DomainSocket::DomainSocket(SocketProtocol protocol, bool child_processes_inherit, Error &error)
: Socket(CreateSocket(kDomain, kType, 0, child_processes_inherit, error), protocol, true)
{
}
Error
DomainSocket::Connect(llvm::StringRef name)
{
sockaddr_un saddr_un;
socklen_t saddr_un_len;
if (!SetSockAddr(name, GetNameOffset(), &saddr_un, saddr_un_len))
return Error("Failed to set socket address");
Error error;
if (::connect(GetNativeSocket(), (struct sockaddr *)&saddr_un, saddr_un_len) < 0)
SetLastError (error);
return error;
}
Error
DomainSocket::Listen(llvm::StringRef name, int backlog)
{
sockaddr_un saddr_un;
socklen_t saddr_un_len;
if (!SetSockAddr(name, GetNameOffset(), &saddr_un, saddr_un_len))
return Error("Failed to set socket address");
DeleteSocketFile(name);
Error error;
if (::bind(GetNativeSocket(), (struct sockaddr *)&saddr_un, saddr_un_len) == 0)
if (::listen(GetNativeSocket(), backlog) == 0)
return error;
SetLastError(error);
return error;
}
Error
DomainSocket::Accept(llvm::StringRef name, bool child_processes_inherit, Socket *&socket)
{
Error error;
auto conn_fd = AcceptSocket(GetNativeSocket(), nullptr, nullptr, child_processes_inherit, error);
if (error.Success())
socket = new DomainSocket(conn_fd);
return error;
}
size_t
DomainSocket::GetNameOffset() const
{
return 0;
}
void
DomainSocket::DeleteSocketFile(llvm::StringRef name)
{
FileSystem::Unlink(FileSpec{name, true});
}
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