1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef __CUTILS_SOCKETS_H 18 #define __CUTILS_SOCKETS_H 19 20 #include <errno.h> 21 #include <stdlib.h> 22 #include <string.h> 23 24 #ifdef HAVE_WINSOCK 25 #include <winsock2.h> 26 typedef int socklen_t; 27 #elif HAVE_SYS_SOCKET_H 28 #include <sys/socket.h> 29 #endif 30 31 #define ANDROID_SOCKET_ENV_PREFIX "ANDROID_SOCKET_" 32 #define ANDROID_SOCKET_DIR "/dev/socket" 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /* 39 * android_get_control_socket - simple helper function to get the file 40 * descriptor of our init-managed Unix domain socket. `name' is the name of the 41 * socket, as given in init.rc. Returns -1 on error. 42 * 43 * This is inline and not in libcutils proper because we want to use this in 44 * third-party daemons with minimal modification. 45 */ 46 static inline int android_get_control_socket(const char *name) 47 { 48 char key[64] = ANDROID_SOCKET_ENV_PREFIX; 49 const char *val; 50 int fd; 51 52 /* build our environment variable, counting cycles like a wolf ... */ 53 #if HAVE_STRLCPY 54 strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1, 55 name, 56 sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX)); 57 #else /* for the host, which may lack the almightly strncpy ... */ 58 strncpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1, 59 name, 60 sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX)); 61 key[sizeof(key)-1] = '\0'; 62 #endif 63 64 val = getenv(key); 65 if (!val) 66 return -1; 67 68 errno = 0; 69 fd = strtol(val, NULL, 10); 70 if (errno) 71 return -1; 72 73 return fd; 74 } 75 76 /* 77 * See also android.os.LocalSocketAddress.Namespace 78 */ 79 // Linux "abstract" (non-filesystem) namespace 80 #define ANDROID_SOCKET_NAMESPACE_ABSTRACT 0 81 // Android "reserved" (/dev/socket) namespace 82 #define ANDROID_SOCKET_NAMESPACE_RESERVED 1 83 // Normal filesystem namespace 84 #define ANDROID_SOCKET_NAMESPACE_FILESYSTEM 2 85 86 extern int socket_loopback_client(int port, int type); 87 extern int socket_network_client(const char *host, int port, int type); 88 extern int socket_loopback_server(int port, int type); 89 extern int socket_local_server(const char *name, int namespaceId, int type); 90 extern int socket_local_server_bind(int s, const char *name, int namespaceId); 91 extern int socket_local_client_connect(int fd, 92 const char *name, int namespaceId, int type); 93 extern int socket_local_client(const char *name, int namespaceId, int type); 94 extern int socket_inaddr_any_server(int port, int type); 95 96 #ifdef __cplusplus 97 } 98 #endif 99 100 #endif /* __CUTILS_SOCKETS_H */ 101
