125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
/* libs/cutils/socket_local_server.c
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**
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** Copyright 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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#include <cutils/sockets.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stddef.h>
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#ifdef HAVE_WINSOCK
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int socket_local_server(const char *name, int namespaceId, int type)
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{
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errno = ENOSYS;
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return -1;
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}
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#else /* !HAVE_WINSOCK */
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/select.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include "socket_local.h"
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#define LISTEN_BACKLOG 4
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/**
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* Binds a pre-created socket(AF_LOCAL) 's' to 'name'
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* returns 's' on success, -1 on fail
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*
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* Does not call listen()
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*/
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int socket_local_server_bind(int s, const char *name, int namespaceId)
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{
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struct sockaddr_un addr;
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socklen_t alen;
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int n;
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int err;
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err = socket_make_sockaddr_un(name, namespaceId, &addr, &alen);
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if (err < 0) {
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return -1;
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}
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/* basically: if this is a filesystem path, unlink first */
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#ifndef HAVE_LINUX_LOCAL_SOCKET_NAMESPACE
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if (1) {
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#else
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if (namespaceId == ANDROID_SOCKET_NAMESPACE_RESERVED
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|| namespaceId == ANDROID_SOCKET_NAMESPACE_FILESYSTEM) {
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#endif
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/*ignore ENOENT*/
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unlink(addr.sun_path);
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}
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n = 1;
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setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n));
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if(bind(s, (struct sockaddr *) &addr, alen) < 0) {
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return -1;
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}
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return s;
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}
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/** Open a server-side UNIX domain datagram socket in the Linux non-filesystem
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* namespace
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*
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* Returns fd on success, -1 on fail
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*/
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int socket_local_server(const char *name, int namespace, int type)
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{
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int err;
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int s;
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s = socket(AF_LOCAL, type, 0);
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if (s < 0) return -1;
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err = socket_local_server_bind(s, name, namespace);
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if (err < 0) {
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close(s);
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return -1;
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}
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if (type == SOCK_STREAM) {
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int ret;
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ret = listen(s, LISTEN_BACKLOG);
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if (ret < 0) {
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close(s);
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return -1;
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}
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}
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return s;
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}
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#endif /* !HAVE_WINSOCK */
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