The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /* libs/cutils/socket_local_server.c |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <cutils/sockets.h> |
| 19 | |
| 20 | #include <stdlib.h> |
| 21 | #include <string.h> |
| 22 | #include <unistd.h> |
| 23 | #include <errno.h> |
| 24 | #include <stddef.h> |
| 25 | |
| 26 | #ifdef HAVE_WINSOCK |
| 27 | |
| 28 | int socket_local_server(const char *name, int namespaceId, int type) |
| 29 | { |
| 30 | errno = ENOSYS; |
| 31 | return -1; |
| 32 | } |
| 33 | |
| 34 | #else /* !HAVE_WINSOCK */ |
| 35 | |
| 36 | #include <sys/socket.h> |
| 37 | #include <sys/un.h> |
| 38 | #include <sys/select.h> |
| 39 | #include <sys/types.h> |
| 40 | #include <netinet/in.h> |
| 41 | |
| 42 | #include "socket_local.h" |
| 43 | |
| 44 | #define LISTEN_BACKLOG 4 |
| 45 | |
| 46 | |
| 47 | /** |
| 48 | * Binds a pre-created socket(AF_LOCAL) 's' to 'name' |
| 49 | * returns 's' on success, -1 on fail |
| 50 | * |
| 51 | * Does not call listen() |
| 52 | */ |
| 53 | int socket_local_server_bind(int s, const char *name, int namespaceId) |
| 54 | { |
| 55 | struct sockaddr_un addr; |
| 56 | socklen_t alen; |
| 57 | int n; |
| 58 | int err; |
| 59 | |
| 60 | err = socket_make_sockaddr_un(name, namespaceId, &addr, &alen); |
| 61 | |
| 62 | if (err < 0) { |
| 63 | return -1; |
| 64 | } |
| 65 | |
| 66 | /* basically: if this is a filesystem path, unlink first */ |
| 67 | #ifndef HAVE_LINUX_LOCAL_SOCKET_NAMESPACE |
| 68 | if (1) { |
| 69 | #else |
| 70 | if (namespaceId == ANDROID_SOCKET_NAMESPACE_RESERVED |
| 71 | || namespaceId == ANDROID_SOCKET_NAMESPACE_FILESYSTEM) { |
| 72 | #endif |
| 73 | /*ignore ENOENT*/ |
| 74 | unlink(addr.sun_path); |
| 75 | } |
| 76 | |
| 77 | n = 1; |
| 78 | setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)); |
| 79 | |
| 80 | if(bind(s, (struct sockaddr *) &addr, alen) < 0) { |
| 81 | return -1; |
| 82 | } |
| 83 | |
| 84 | return s; |
| 85 | |
| 86 | } |
| 87 | |
| 88 | |
| 89 | /** Open a server-side UNIX domain datagram socket in the Linux non-filesystem |
| 90 | * namespace |
| 91 | * |
| 92 | * Returns fd on success, -1 on fail |
| 93 | */ |
| 94 | |
| 95 | int socket_local_server(const char *name, int namespace, int type) |
| 96 | { |
| 97 | int err; |
| 98 | int s; |
| 99 | |
| 100 | s = socket(AF_LOCAL, type, 0); |
| 101 | if (s < 0) return -1; |
| 102 | |
| 103 | err = socket_local_server_bind(s, name, namespace); |
| 104 | |
| 105 | if (err < 0) { |
| 106 | close(s); |
| 107 | return -1; |
| 108 | } |
| 109 | |
| 110 | if (type == SOCK_STREAM) { |
| 111 | int ret; |
| 112 | |
| 113 | ret = listen(s, LISTEN_BACKLOG); |
| 114 | |
| 115 | if (ret < 0) { |
| 116 | close(s); |
| 117 | return -1; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | return s; |
| 122 | } |
| 123 | |
| 124 | #endif /* !HAVE_WINSOCK */ |