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 14 namespace base { 15 class FilePath; 16 } // namespace base 17 18 namespace 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. 28 IPC_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. 34 IPC_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. 40 IPC_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. 44 IPC_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. 53 IPC_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. 60 static const size_t kMaxSocketNameLength = 104; 61 62 } // namespace IPC 63 64 #endif // IPC_UNIX_DOMAIN_SOCKET_UTIL_H_ 65
