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/*
* Copyright (c) 2008, 2009 Nicira Networks.
*
* 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 <config.h>
#include "stream.h"
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
#include <netdb.h>
#include <poll.h>
#include <sys/types.h>
#include <sys/un.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "packets.h"
#include "poll-loop.h"
#include "socket-util.h"
#include "util.h"
#include "stream-provider.h"
#include "stream-fd.h"
#include "vlog.h"
#define THIS_MODULE VLM_stream_unix
/* Active UNIX socket. */
/* Number of unix sockets created so far, to ensure binding path uniqueness. */
static int n_unix_sockets;
static int
unix_open(const char *name, char *suffix, struct stream **streamp)
{
const char *connect_path = suffix;
char *bind_path;
int fd;
bind_path = xasprintf("/tmp/stream-unix.%ld.%d",
(long int) getpid(), n_unix_sockets++);
fd = make_unix_socket(SOCK_STREAM, true, false, bind_path, connect_path);
if (fd < 0) {
VLOG_ERR("%s: connection to %s failed: %s",
bind_path, connect_path, strerror(-fd));
free(bind_path);
return -fd;
}
return new_fd_stream(name, fd, check_connection_completion(fd),
bind_path, streamp);
}
struct stream_class unix_stream_class = {
"unix", /* name */
unix_open, /* open */
NULL, /* close */
NULL, /* connect */
NULL, /* recv */
NULL, /* send */
NULL, /* wait */
};
/* Passive UNIX socket. */
static int punix_accept(int fd, const struct sockaddr *sa, size_t sa_len,
struct stream **streamp);
static int
punix_open(const char *name UNUSED, char *suffix, struct pstream **pstreamp)
{
int fd, error;
fd = make_unix_socket(SOCK_STREAM, true, true, suffix, NULL);
if (fd < 0) {
VLOG_ERR("%s: binding failed: %s", suffix, strerror(errno));
return errno;
}
if (listen(fd, 10) < 0) {
error = errno;
VLOG_ERR("%s: listen: %s", name, strerror(error));
close(fd);
return error;
}
return new_fd_pstream("punix", fd, punix_accept,
xstrdup(suffix), pstreamp);
}
static int
punix_accept(int fd, const struct sockaddr *sa, size_t sa_len,
struct stream **streamp)
{
const struct sockaddr_un *sun = (const struct sockaddr_un *) sa;
int name_len = get_unix_name_len(sa_len);
char name[128];
if (name_len > 0) {
snprintf(name, sizeof name, "unix:%.*s", name_len, sun->sun_path);
} else {
strcpy(name, "unix");
}
return new_fd_stream(name, fd, 0, NULL, streamp);
}
struct pstream_class punix_pstream_class = {
"punix",
punix_open,
NULL,
NULL,
NULL
};
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