12a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Copyright 2013 The Chromium Authors. All rights reserved. 22a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 32a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// found in the LICENSE file. 42a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 52a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#ifndef IPC_UNIX_DOMAIN_SOCKET_UTIL_H_ 62a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define IPC_UNIX_DOMAIN_SOCKET_UTIL_H_ 72a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 82a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include <sys/types.h> 92a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include <string> 112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "ipc/ipc_export.h" 132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)namespace base { 152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)class FilePath; 162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} // namespace base 172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)namespace IPC { 192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Creates a UNIX-domain socket at |socket_name| and bind()s it, then listen()s 212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// on it. If successful, |server_listen_fd| will be set to the new file 222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// descriptor, and the function will return true. Otherwise returns false. 232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// This function also effectively performs `mkdir -p` on the dirname of 252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// |socket_name| to ensure that all the directories up to |socket_name| exist. 262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// As a result of which this function must be run on a thread that allows 272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// blocking I/O, e.g. the FILE thread in Chrome's browser process. 282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)IPC_EXPORT bool CreateServerUnixDomainSocket(const base::FilePath& socket_name, 292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int* server_listen_fd); 302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Opens a UNIX-domain socket at |socket_name| and connect()s to it. If 322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// successful, |client_socket| will be set to the new file descriptor, and the 332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// function will return true. Otherwise returns false. 342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)IPC_EXPORT bool CreateClientUnixDomainSocket(const base::FilePath& socket_name, 352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int* client_socket); 362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Gets the effective user ID of the other end of the UNIX-domain socket 382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// specified by |fd|. If successful, sets |peer_euid| to the uid, and returns 392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// true. Otherwise returns false. 402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)IPC_EXPORT bool GetPeerEuid(int fd, uid_t* peer_euid); 412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Checks that the process on the other end of the UNIX domain socket 432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// represented by |peer_fd| shares the same EUID as this process. 442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)IPC_EXPORT bool IsPeerAuthorized(int peer_fd); 452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Accepts a client attempting to connect to |server_listen_fd|, storing the 472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// new file descriptor for the connection in |server_socket|. 482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Returns false if |server_listen_fd| encounters an unrecoverable error. 502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Returns true if it's valid to keep listening on |server_listen_fd|. In this 512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// case, it's possible that a connection wasn't successfully established; then, 522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// |server_socket| will be set to -1. 532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)IPC_EXPORT bool ServerAcceptConnection(int server_listen_fd, 542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int* server_socket); 552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// The maximum length of the name of a socket for MODE_NAMED_SERVER or 572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// MODE_NAMED_CLIENT if you want to pass in your own socket. 582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// The standard size on linux is 108, mac is 104. To maintain consistency 592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// across platforms we standardize on the smaller value. 602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static const size_t kMaxSocketNameLength = 104; 612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} // namespace IPC 632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif // IPC_UNIX_DOMAIN_SOCKET_UTIL_H_ 65