| The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame^] | 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 */ |