1// Copyright 2013 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef IPC_UNIX_DOMAIN_SOCKET_UTIL_H_ 6#define IPC_UNIX_DOMAIN_SOCKET_UTIL_H_ 7 8#include <sys/types.h> 9 10#include <string> 11 12#include "ipc/ipc_export.h" 13 14namespace base { 15class FilePath; 16} // namespace base 17 18namespace IPC { 19 20// Creates a UNIX-domain socket at |socket_name| and bind()s it, then listen()s 21// on it. If successful, |server_listen_fd| will be set to the new file 22// descriptor, and the function will return true. Otherwise returns false. 23// 24// This function also effectively performs `mkdir -p` on the dirname of 25// |socket_name| to ensure that all the directories up to |socket_name| exist. 26// As a result of which this function must be run on a thread that allows 27// blocking I/O, e.g. the FILE thread in Chrome's browser process. 28IPC_EXPORT bool CreateServerUnixDomainSocket(const base::FilePath& socket_name, 29 int* server_listen_fd); 30 31// Opens a UNIX-domain socket at |socket_name| and connect()s to it. If 32// successful, |client_socket| will be set to the new file descriptor, and the 33// function will return true. Otherwise returns false. 34IPC_EXPORT bool CreateClientUnixDomainSocket(const base::FilePath& socket_name, 35 int* client_socket); 36 37// Gets the effective user ID of the other end of the UNIX-domain socket 38// specified by |fd|. If successful, sets |peer_euid| to the uid, and returns 39// true. Otherwise returns false. 40IPC_EXPORT bool GetPeerEuid(int fd, uid_t* peer_euid); 41 42// Checks that the process on the other end of the UNIX domain socket 43// represented by |peer_fd| shares the same EUID as this process. 44IPC_EXPORT bool IsPeerAuthorized(int peer_fd); 45 46// Accepts a client attempting to connect to |server_listen_fd|, storing the 47// new file descriptor for the connection in |server_socket|. 48// 49// Returns false if |server_listen_fd| encounters an unrecoverable error. 50// Returns true if it's valid to keep listening on |server_listen_fd|. In this 51// case, it's possible that a connection wasn't successfully established; then, 52// |server_socket| will be set to -1. 53IPC_EXPORT bool ServerAcceptConnection(int server_listen_fd, 54 int* server_socket); 55 56// The maximum length of the name of a socket for MODE_NAMED_SERVER or 57// MODE_NAMED_CLIENT if you want to pass in your own socket. 58// The standard size on linux is 108, mac is 104. To maintain consistency 59// across platforms we standardize on the smaller value. 60static const size_t kMaxSocketNameLength = 104; 61 62} // namespace IPC 63 64#endif // IPC_UNIX_DOMAIN_SOCKET_UTIL_H_ 65