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/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
*
* 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 <errno.h>
#include <inttypes.h>
#include <netdb.h>
#include <poll.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ovs-atomic.h"
#include "packets.h"
#include "openvswitch/poll-loop.h"
#include "socket-util.h"
#include "dirs.h"
#include "util.h"
#include "stream-provider.h"
#include "stream-fd.h"
#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(stream_unix);
/* Active UNIX socket. */
static int
unix_open(const char *name, char *suffix, struct stream **streamp,
uint8_t dscp OVS_UNUSED)
{
char *connect_path;
int fd;
connect_path = abs_file_name(ovs_rundir(), suffix);
fd = make_unix_socket(SOCK_STREAM, true, NULL, connect_path);
if (fd < 0) {
VLOG_DBG("%s: connection failed (%s)",
connect_path, ovs_strerror(-fd));
free(connect_path);
return -fd;
}
free(connect_path);
return new_fd_stream(xstrdup(name), fd, check_connection_completion(fd),
AF_UNIX, streamp);
}
const struct stream_class unix_stream_class = {
"unix", /* name */
false, /* needs_probes */
unix_open, /* open */
NULL, /* close */
NULL, /* connect */
NULL, /* recv */
NULL, /* send */
NULL, /* run */
NULL, /* run_wait */
NULL, /* wait */
};
/* Passive UNIX socket. */
static int punix_accept(int fd, const struct sockaddr_storage *ss,
size_t ss_len, struct stream **streamp);
static int
punix_open(const char *name OVS_UNUSED, char *suffix,
struct pstream **pstreamp, uint8_t dscp OVS_UNUSED)
{
char *bind_path;
int fd, error;
bind_path = abs_file_name(ovs_rundir(), suffix);
fd = make_unix_socket(SOCK_STREAM, true, bind_path, NULL);
if (fd < 0) {
VLOG_ERR("%s: binding failed: %s", bind_path, ovs_strerror(errno));
free(bind_path);
return errno;
}
if (listen(fd, 64) < 0) {
error = errno;
VLOG_ERR("%s: listen: %s", name, ovs_strerror(error));
close(fd);
free(bind_path);
return error;
}
return new_fd_pstream(xstrdup(name), fd,
punix_accept, bind_path, pstreamp);
}
static int
punix_accept(int fd, const struct sockaddr_storage *ss, size_t ss_len,
struct stream **streamp)
{
const struct sockaddr_un *sun = (const struct sockaddr_un *) ss;
int name_len = get_unix_name_len(sun, ss_len);
char *bound_name;
if (name_len > 0) {
bound_name = xasprintf("unix:%.*s", name_len, sun->sun_path);
} else {
/* When a Unix socket connects to us without first binding a name, we
* don't get any name for it. It's useful nevertheless to be able to
* distinguish separate sockets in log messages, so use a counter. */
static atomic_count next_idx = ATOMIC_COUNT_INIT(0);
bound_name = xasprintf("unix#%u", atomic_count_inc(&next_idx));
}
return new_fd_stream(bound_name, fd, 0, AF_UNIX, streamp);
}
const struct pstream_class punix_pstream_class = {
"punix",
false,
punix_open,
NULL,
NULL,
NULL,
};
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