mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 14:26:09 +03:00
112 lines
4.4 KiB
C++
112 lines
4.4 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#ifndef BASE_POSIX_UNIX_DOMAIN_SOCKET_H_
|
|
#define BASE_POSIX_UNIX_DOMAIN_SOCKET_H_
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <sys/types.h>
|
|
#include <vector>
|
|
|
|
#include "base/base_export.h"
|
|
#include "base/files/scoped_file.h"
|
|
#include "base/process/process_handle.h"
|
|
#include "build/build_config.h"
|
|
|
|
namespace base {
|
|
|
|
class Pickle;
|
|
|
|
#if !defined(OS_NACL_NONSFI)
|
|
// Creates a connected pair of UNIX-domain SOCK_SEQPACKET sockets, and passes
|
|
// ownership of the newly allocated file descriptors to |one| and |two|.
|
|
// Returns true on success.
|
|
bool BASE_EXPORT CreateSocketPair(ScopedFD* one, ScopedFD* two);
|
|
#endif
|
|
|
|
class BASE_EXPORT UnixDomainSocket {
|
|
public:
|
|
// Maximum number of file descriptors that can be read by RecvMsg().
|
|
static const size_t kMaxFileDescriptors;
|
|
|
|
#if !defined(OS_NACL_NONSFI)
|
|
// Use to enable receiving process IDs in RecvMsgWithPid. Should be called on
|
|
// the receiving socket (i.e., the socket passed to RecvMsgWithPid). Returns
|
|
// true if successful.
|
|
static bool EnableReceiveProcessId(int fd);
|
|
#endif // !defined(OS_NACL_NONSFI)
|
|
|
|
// Use sendmsg to write the given msg and include a vector of file
|
|
// descriptors. Returns true if successful.
|
|
static bool SendMsg(int fd,
|
|
const void* msg,
|
|
size_t length,
|
|
const std::vector<int>& fds);
|
|
|
|
// Use recvmsg to read a message and an array of file descriptors. Returns
|
|
// -1 on failure. Note: will read, at most, |kMaxFileDescriptors| descriptors.
|
|
static ssize_t RecvMsg(int fd,
|
|
void* msg,
|
|
size_t length,
|
|
std::vector<ScopedFD>* fds);
|
|
|
|
// Same as RecvMsg above, but also returns the sender's process ID (as seen
|
|
// from the caller's namespace). However, before using this function to
|
|
// receive process IDs, EnableReceiveProcessId() should be called on the
|
|
// receiving socket.
|
|
static ssize_t RecvMsgWithPid(int fd,
|
|
void* msg,
|
|
size_t length,
|
|
std::vector<ScopedFD>* fds,
|
|
ProcessId* pid);
|
|
|
|
#if !defined(OS_NACL_NONSFI)
|
|
// Perform a sendmsg/recvmsg pair.
|
|
// 1. This process creates a UNIX SEQPACKET socketpair. Using
|
|
// connection-oriented sockets (SEQPACKET or STREAM) is critical here,
|
|
// because if one of the ends closes the other one must be notified.
|
|
// 2. This process writes a request to |fd| with an SCM_RIGHTS control
|
|
// message containing on end of the fresh socket pair.
|
|
// 3. This process blocks reading from the other end of the fresh
|
|
// socketpair.
|
|
// 4. The target process receives the request, processes it and writes the
|
|
// reply to the end of the socketpair contained in the request.
|
|
// 5. This process wakes up and continues.
|
|
//
|
|
// fd: descriptor to send the request on
|
|
// reply: buffer for the reply
|
|
// reply_len: size of |reply|
|
|
// result_fd: (may be NULL) the file descriptor returned in the reply
|
|
// (if any)
|
|
// request: the bytes to send in the request
|
|
static ssize_t SendRecvMsg(int fd,
|
|
uint8_t* reply,
|
|
unsigned reply_len,
|
|
int* result_fd,
|
|
const Pickle& request);
|
|
|
|
// Similar to SendRecvMsg(), but |recvmsg_flags| allows to control the flags
|
|
// of the recvmsg(2) call.
|
|
static ssize_t SendRecvMsgWithFlags(int fd,
|
|
uint8_t* reply,
|
|
unsigned reply_len,
|
|
int recvmsg_flags,
|
|
int* result_fd,
|
|
const Pickle& request);
|
|
#endif // !defined(OS_NACL_NONSFI)
|
|
private:
|
|
// Similar to RecvMsg, but allows to specify |flags| for recvmsg(2).
|
|
static ssize_t RecvMsgWithFlags(int fd,
|
|
void* msg,
|
|
size_t length,
|
|
int flags,
|
|
std::vector<ScopedFD>* fds,
|
|
ProcessId* pid);
|
|
};
|
|
|
|
} // namespace base
|
|
|
|
#endif // BASE_POSIX_UNIX_DOMAIN_SOCKET_H_
|