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- /*
- * Copyright (C) 2006 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #include <cutils/sockets.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <errno.h>
- #include <stddef.h>
- #ifdef HAVE_WINSOCK
- int socket_local_client(const char *name, int namespaceId, int type)
- {
- errno = ENOSYS;
- return -1;
- }
- #else /* !HAVE_WINSOCK */
- #include <sys/socket.h>
- #include <sys/un.h>
- #include <sys/select.h>
- #include <sys/types.h>
- #include "socket_local.h"
- #define LISTEN_BACKLOG 4
- /* Documented in header file. */
- int socket_make_sockaddr_un(const char *name, int namespaceId,
- struct sockaddr_un *p_addr, socklen_t *alen)
- {
- memset (p_addr, 0, sizeof (*p_addr));
- size_t namelen;
- switch (namespaceId) {
- case ANDROID_SOCKET_NAMESPACE_ABSTRACT:
- #ifdef HAVE_LINUX_LOCAL_SOCKET_NAMESPACE
- namelen = strlen(name);
- // Test with length +1 for the *initial* '\0'.
- if ((namelen + 1) > sizeof(p_addr->sun_path)) {
- goto error;
- }
- /*
- * Note: The path in this case is *not* supposed to be
- * '\0'-terminated. ("man 7 unix" for the gory details.)
- */
- p_addr->sun_path[0] = 0;
- memcpy(p_addr->sun_path + 1, name, namelen);
- #else /*HAVE_LINUX_LOCAL_SOCKET_NAMESPACE*/
- /* this OS doesn't have the Linux abstract namespace */
- namelen = strlen(name) + strlen(FILESYSTEM_SOCKET_PREFIX);
- /* unix_path_max appears to be missing on linux */
- if (namelen > sizeof(*p_addr)
- - offsetof(struct sockaddr_un, sun_path) - 1) {
- goto error;
- }
- strcpy(p_addr->sun_path, FILESYSTEM_SOCKET_PREFIX);
- strcat(p_addr->sun_path, name);
- #endif /*HAVE_LINUX_LOCAL_SOCKET_NAMESPACE*/
- break;
- case ANDROID_SOCKET_NAMESPACE_RESERVED:
- namelen = strlen(name) + strlen(ANDROID_RESERVED_SOCKET_PREFIX);
- /* unix_path_max appears to be missing on linux */
- if (namelen > sizeof(*p_addr)
- - offsetof(struct sockaddr_un, sun_path) - 1) {
- goto error;
- }
- strcpy(p_addr->sun_path, ANDROID_RESERVED_SOCKET_PREFIX);
- strcat(p_addr->sun_path, name);
- break;
- case ANDROID_SOCKET_NAMESPACE_FILESYSTEM:
- namelen = strlen(name);
- /* unix_path_max appears to be missing on linux */
- if (namelen > sizeof(*p_addr)
- - offsetof(struct sockaddr_un, sun_path) - 1) {
- goto error;
- }
- strcpy(p_addr->sun_path, name);
- break;
- default:
- // invalid namespace id
- return -1;
- }
- p_addr->sun_family = AF_LOCAL;
- *alen = namelen + offsetof(struct sockaddr_un, sun_path) + 1;
- return 0;
- error:
- return -1;
- }
- /**
- * connect to peer named "name" on fd
- * returns same fd or -1 on error.
- * fd is not closed on error. that's your job.
- *
- * Used by AndroidSocketImpl
- */
- int socket_local_client_connect(int fd, const char *name, int namespaceId,
- int type)
- {
- struct sockaddr_un addr;
- socklen_t alen;
- size_t namelen;
- int err;
- err = socket_make_sockaddr_un(name, namespaceId, &addr, &alen);
- if (err < 0) {
- goto error;
- }
- if(connect(fd, (struct sockaddr *) &addr, alen) < 0) {
- goto error;
- }
- return fd;
- error:
- return -1;
- }
- /**
- * connect to peer named "name"
- * returns fd or -1 on error
- */
- int socket_local_client(const char *name, int namespaceId, int type)
- {
- int s;
- s = socket(AF_LOCAL, type, 0);
- if(s < 0) return -1;
- if ( 0 > socket_local_client_connect(s, name, namespaceId, type)) {
- close(s);
- return -1;
- }
- return s;
- }
- #endif /* !HAVE_WINSOCK */
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