101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __CUTILS_SOCKETS_H
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#define __CUTILS_SOCKETS_H
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_WINSOCK
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#include <winsock2.h>
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typedef int socklen_t;
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#elif HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#define ANDROID_SOCKET_ENV_PREFIX "ANDROID_SOCKET_"
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#define ANDROID_SOCKET_DIR "/dev/socket"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* android_get_control_socket - simple helper function to get the file
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* descriptor of our init-managed Unix domain socket. `name' is the name of the
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* socket, as given in init.rc. Returns -1 on error.
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*
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* This is inline and not in libcutils proper because we want to use this in
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* third-party daemons with minimal modification.
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*/
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static inline int android_get_control_socket(const char *name)
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{
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char key[64] = ANDROID_SOCKET_ENV_PREFIX;
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const char *val;
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int fd;
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/* build our environment variable, counting cycles like a wolf ... */
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#if HAVE_STRLCPY
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strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1,
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name,
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sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX));
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#else /* for the host, which may lack the almightly strncpy ... */
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strncpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1,
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name,
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sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX));
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key[sizeof(key)-1] = '\0';
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#endif
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val = getenv(key);
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if (!val)
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return -1;
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errno = 0;
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fd = strtol(val, NULL, 10);
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if (errno)
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return -1;
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return fd;
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}
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/*
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* See also android.os.LocalSocketAddress.Namespace
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*/
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// Linux "abstract" (non-filesystem) namespace
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#define ANDROID_SOCKET_NAMESPACE_ABSTRACT 0
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// Android "reserved" (/dev/socket) namespace
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#define ANDROID_SOCKET_NAMESPACE_RESERVED 1
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// Normal filesystem namespace
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#define ANDROID_SOCKET_NAMESPACE_FILESYSTEM 2
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extern int socket_loopback_client(int port, int type);
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extern int socket_network_client(const char *host, int port, int type);
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extern int socket_loopback_server(int port, int type);
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extern int socket_local_server(const char *name, int namespaceId, int type);
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extern int socket_local_server_bind(int s, const char *name, int namespaceId);
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extern int socket_local_client_connect(int fd,
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const char *name, int namespaceId, int type);
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extern int socket_local_client(const char *name, int namespaceId, int type);
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extern int socket_inaddr_any_server(int port, int type);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CUTILS_SOCKETS_H */
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