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