1 //===-- DomainSocket.cpp ----------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "lldb/Host/posix/DomainSocket.h"
12 #include "lldb/Host/FileSystem.h"
15 #include <sys/socket.h>
19 using namespace lldb_private;
22 // Android does not have SUN_LEN
24 #define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) + strlen((ptr)->sun_path))
26 #endif // #ifdef __ANDROID__
30 const int kDomain = AF_UNIX;
31 const int kType = SOCK_STREAM;
33 bool SetSockAddr(llvm::StringRef name,
34 const size_t name_offset,
35 sockaddr_un* saddr_un,
36 socklen_t& saddr_un_len)
38 if (name.size() + name_offset > sizeof(saddr_un->sun_path))
41 memset(saddr_un, 0, sizeof(*saddr_un));
42 saddr_un->sun_family = kDomain;
44 memcpy(saddr_un->sun_path + name_offset, name.data(), name.size());
46 // For domain sockets we can use SUN_LEN in order to calculate size of
47 // sockaddr_un, but for abstract sockets we have to calculate size manually
48 // because of leading null symbol.
50 saddr_un_len = SUN_LEN(saddr_un);
52 saddr_un_len = offsetof(struct sockaddr_un, sun_path) + name_offset + name.size();
54 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__)
55 saddr_un->sun_len = saddr_un_len;
63 DomainSocket::DomainSocket(NativeSocket socket)
64 : Socket(socket, ProtocolUnixDomain, true)
68 DomainSocket::DomainSocket(bool child_processes_inherit, Error &error)
69 : DomainSocket(CreateSocket(kDomain, kType, 0, child_processes_inherit, error))
73 DomainSocket::DomainSocket(SocketProtocol protocol, bool child_processes_inherit, Error &error)
74 : Socket(CreateSocket(kDomain, kType, 0, child_processes_inherit, error), protocol, true)
79 DomainSocket::Connect(llvm::StringRef name)
82 socklen_t saddr_un_len;
83 if (!SetSockAddr(name, GetNameOffset(), &saddr_un, saddr_un_len))
84 return Error("Failed to set socket address");
87 if (::connect(GetNativeSocket(), (struct sockaddr *)&saddr_un, saddr_un_len) < 0)
94 DomainSocket::Listen(llvm::StringRef name, int backlog)
97 socklen_t saddr_un_len;
98 if (!SetSockAddr(name, GetNameOffset(), &saddr_un, saddr_un_len))
99 return Error("Failed to set socket address");
101 DeleteSocketFile(name);
104 if (::bind(GetNativeSocket(), (struct sockaddr *)&saddr_un, saddr_un_len) == 0)
105 if (::listen(GetNativeSocket(), backlog) == 0)
113 DomainSocket::Accept(llvm::StringRef name, bool child_processes_inherit, Socket *&socket)
116 auto conn_fd = AcceptSocket(GetNativeSocket(), nullptr, nullptr, child_processes_inherit, error);
118 socket = new DomainSocket(conn_fd);
124 DomainSocket::GetNameOffset() const
130 DomainSocket::DeleteSocketFile(llvm::StringRef name)
132 FileSystem::Unlink(FileSpec{name, true});