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 "llvm/Support/FileSystem.h"
15 #include <sys/socket.h>
19 using namespace lldb_private;
22 // Android does not have SUN_LEN
24 #define SUN_LEN(ptr) \
25 (offsetof(struct sockaddr_un, sun_path) + strlen((ptr)->sun_path))
27 #endif // #ifdef __ANDROID__
31 const int kDomain = AF_UNIX;
32 const int kType = SOCK_STREAM;
34 bool SetSockAddr(llvm::StringRef name, const size_t name_offset,
35 sockaddr_un *saddr_un, socklen_t &saddr_un_len) {
36 if (name.size() + name_offset > sizeof(saddr_un->sun_path))
39 memset(saddr_un, 0, sizeof(*saddr_un));
40 saddr_un->sun_family = kDomain;
42 memcpy(saddr_un->sun_path + name_offset, name.data(), name.size());
44 // For domain sockets we can use SUN_LEN in order to calculate size of
45 // sockaddr_un, but for abstract sockets we have to calculate size manually
46 // because of leading null symbol.
48 saddr_un_len = SUN_LEN(saddr_un);
51 offsetof(struct sockaddr_un, sun_path) + name_offset + name.size();
53 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__)
54 saddr_un->sun_len = saddr_un_len;
61 DomainSocket::DomainSocket(bool should_close, bool child_processes_inherit)
62 : Socket(ProtocolUnixDomain, should_close, child_processes_inherit) {}
64 DomainSocket::DomainSocket(SocketProtocol protocol,
65 bool child_processes_inherit)
66 : Socket(protocol, true, child_processes_inherit) {}
68 DomainSocket::DomainSocket(NativeSocket socket,
69 const DomainSocket &listen_socket)
70 : Socket(ProtocolUnixDomain, listen_socket.m_should_close_fd,
71 listen_socket.m_child_processes_inherit) {
75 Status DomainSocket::Connect(llvm::StringRef name) {
77 socklen_t saddr_un_len;
78 if (!SetSockAddr(name, GetNameOffset(), &saddr_un, saddr_un_len))
79 return Status("Failed to set socket address");
82 m_socket = CreateSocket(kDomain, kType, 0, m_child_processes_inherit, error);
85 if (::connect(GetNativeSocket(), (struct sockaddr *)&saddr_un, saddr_un_len) <
92 Status DomainSocket::Listen(llvm::StringRef name, int backlog) {
94 socklen_t saddr_un_len;
95 if (!SetSockAddr(name, GetNameOffset(), &saddr_un, saddr_un_len))
96 return Status("Failed to set socket address");
98 DeleteSocketFile(name);
101 m_socket = CreateSocket(kDomain, kType, 0, m_child_processes_inherit, error);
104 if (::bind(GetNativeSocket(), (struct sockaddr *)&saddr_un, saddr_un_len) ==
106 if (::listen(GetNativeSocket(), backlog) == 0)
113 Status DomainSocket::Accept(Socket *&socket) {
115 auto conn_fd = AcceptSocket(GetNativeSocket(), nullptr, nullptr,
116 m_child_processes_inherit, error);
118 socket = new DomainSocket(conn_fd, *this);
123 size_t DomainSocket::GetNameOffset() const { return 0; }
125 void DomainSocket::DeleteSocketFile(llvm::StringRef name) {
126 llvm::sys::fs::remove(name);