mirror of
https://github.com/openvswitch/ovs
synced 2025-10-23 14:57:06 +00:00
60cb3eb8b2
The vconn code is a relative fossil as OVS code goes. It was written before we had really figured how code should fit together. Part of that history is that it used poll_fd_callback() to register callbacks without the assistance of other code. That isn't how the rest of OVS works now; this code is the only remaining user of that function. To make it more like the rest of the system, this code gets rid of the use of poll_fd_callback(). It also adds vconn_run() and vconn_run_wait() functions and calls to them from the places where they are now required.
130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
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* Copyright (c) 2008, 2009 Nicira Networks.
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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 <config.h>
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#include "vconn.h"
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#include <assert.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <netdb.h>
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#include <poll.h>
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#include <sys/types.h>
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#include <sys/un.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 "ofpbuf.h"
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#include "openflow/openflow.h"
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#include "packets.h"
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#include "poll-loop.h"
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#include "socket-util.h"
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#include "util.h"
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#include "vconn-provider.h"
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#include "vconn-stream.h"
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#include "vlog.h"
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#define THIS_MODULE VLM_vconn_unix
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/* Active UNIX socket. */
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/* Number of unix sockets created so far, to ensure binding path uniqueness. */
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static int n_unix_sockets;
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static int
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unix_open(const char *name, char *suffix, struct vconn **vconnp)
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{
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const char *connect_path = suffix;
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char *bind_path;
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int fd;
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bind_path = xasprintf("/tmp/vconn-unix.%ld.%d",
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(long int) getpid(), n_unix_sockets++);
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fd = make_unix_socket(SOCK_STREAM, true, false, bind_path, connect_path);
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if (fd < 0) {
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VLOG_ERR("%s: connection to %s failed: %s",
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bind_path, connect_path, strerror(-fd));
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free(bind_path);
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return -fd;
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}
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return new_stream_vconn(name, fd, check_connection_completion(fd),
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bind_path, vconnp);
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}
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struct vconn_class unix_vconn_class = {
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"unix", /* name */
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unix_open, /* open */
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NULL, /* close */
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NULL, /* connect */
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NULL, /* recv */
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NULL, /* send */
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NULL, /* run */
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NULL, /* run_wait */
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NULL, /* wait */
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};
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/* Passive UNIX socket. */
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static int punix_accept(int fd, const struct sockaddr *sa, size_t sa_len,
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struct vconn **vconnp);
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static int
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punix_open(const char *name UNUSED, char *suffix, struct pvconn **pvconnp)
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{
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int fd, error;
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fd = make_unix_socket(SOCK_STREAM, true, true, suffix, NULL);
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if (fd < 0) {
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VLOG_ERR("%s: binding failed: %s", suffix, strerror(errno));
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return errno;
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}
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if (listen(fd, 10) < 0) {
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error = errno;
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VLOG_ERR("%s: listen: %s", name, strerror(error));
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close(fd);
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return error;
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}
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return new_pstream_pvconn("punix", fd, punix_accept,
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xstrdup(suffix), pvconnp);
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}
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static int
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punix_accept(int fd, const struct sockaddr *sa, size_t sa_len,
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struct vconn **vconnp)
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{
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const struct sockaddr_un *sun = (const struct sockaddr_un *) sa;
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int name_len = get_unix_name_len(sa_len);
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char name[128];
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if (name_len > 0) {
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snprintf(name, sizeof name, "unix:%.*s", name_len, sun->sun_path);
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} else {
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strcpy(name, "unix");
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}
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return new_stream_vconn(name, fd, 0, NULL, vconnp);
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}
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struct pvconn_class punix_pvconn_class = {
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"punix",
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punix_open,
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NULL,
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NULL,
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NULL
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};
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