168 lines
4.3 KiB
C
168 lines
4.3 KiB
C
/*
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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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#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_client(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 "socket_local.h"
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#define LISTEN_BACKLOG 4
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/* Documented in header file. */
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int socket_make_sockaddr_un(const char *name, int namespaceId,
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struct sockaddr_un *p_addr, socklen_t *alen)
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{
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memset (p_addr, 0, sizeof (*p_addr));
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size_t namelen;
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switch (namespaceId) {
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case ANDROID_SOCKET_NAMESPACE_ABSTRACT:
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#ifdef HAVE_LINUX_LOCAL_SOCKET_NAMESPACE
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namelen = strlen(name);
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// Test with length +1 for the *initial* '\0'.
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if ((namelen + 1) > sizeof(p_addr->sun_path)) {
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goto error;
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}
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/*
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* Note: The path in this case is *not* supposed to be
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* '\0'-terminated. ("man 7 unix" for the gory details.)
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*/
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p_addr->sun_path[0] = 0;
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memcpy(p_addr->sun_path + 1, name, namelen);
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#else /*HAVE_LINUX_LOCAL_SOCKET_NAMESPACE*/
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/* this OS doesn't have the Linux abstract namespace */
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namelen = strlen(name) + strlen(FILESYSTEM_SOCKET_PREFIX);
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/* unix_path_max appears to be missing on linux */
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if (namelen > sizeof(*p_addr)
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- offsetof(struct sockaddr_un, sun_path) - 1) {
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goto error;
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}
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strcpy(p_addr->sun_path, FILESYSTEM_SOCKET_PREFIX);
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strcat(p_addr->sun_path, name);
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#endif /*HAVE_LINUX_LOCAL_SOCKET_NAMESPACE*/
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break;
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case ANDROID_SOCKET_NAMESPACE_RESERVED:
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namelen = strlen(name) + strlen(ANDROID_RESERVED_SOCKET_PREFIX);
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/* unix_path_max appears to be missing on linux */
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if (namelen > sizeof(*p_addr)
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- offsetof(struct sockaddr_un, sun_path) - 1) {
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goto error;
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}
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strcpy(p_addr->sun_path, ANDROID_RESERVED_SOCKET_PREFIX);
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strcat(p_addr->sun_path, name);
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break;
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case ANDROID_SOCKET_NAMESPACE_FILESYSTEM:
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namelen = strlen(name);
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/* unix_path_max appears to be missing on linux */
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if (namelen > sizeof(*p_addr)
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- offsetof(struct sockaddr_un, sun_path) - 1) {
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goto error;
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}
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strcpy(p_addr->sun_path, name);
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break;
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default:
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// invalid namespace id
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return -1;
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}
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p_addr->sun_family = AF_LOCAL;
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*alen = namelen + offsetof(struct sockaddr_un, sun_path) + 1;
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return 0;
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error:
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return -1;
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}
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/**
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* connect to peer named "name" on fd
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* returns same fd or -1 on error.
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* fd is not closed on error. that's your job.
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*
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* Used by AndroidSocketImpl
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*/
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int socket_local_client_connect(int fd, const char *name, int namespaceId,
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int type)
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{
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struct sockaddr_un addr;
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socklen_t alen;
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size_t namelen;
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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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goto error;
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}
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if(connect(fd, (struct sockaddr *) &addr, alen) < 0) {
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goto error;
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}
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return fd;
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error:
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return -1;
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}
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/**
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* connect to peer named "name"
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* returns fd or -1 on error
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*/
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int socket_local_client(const char *name, int namespaceId, int type)
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{
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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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if ( 0 > socket_local_client_connect(s, name, namespaceId, type)) {
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close(s);
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return -1;
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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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