Ben Pfaff
bab6bdbe58
These are useful for local management connections because, unlike TCP sockets, they are subject to regular file system permissions.
129 lines
4.0 KiB
C
129 lines
4.0 KiB
C
/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
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* Junior University
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*
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* We are making the OpenFlow specification and associated documentation
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* (Software) available for public use and benefit with the expectation
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* that others will use, modify and enhance the Software and contribute
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* those enhancements back to the community. However, since we would
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* like to make the Software available for broadest use, with as few
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* restrictions as possible permission is hereby granted, free of
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* charge, to any person obtaining a copy of this Software to deal in
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* the Software under the copyrights without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* The name and trademarks of copyright holder(s) may NOT be used in
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* advertising or publicity pertaining to the Software or any
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* derivatives without specific, written prior permission.
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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 "buffer.h"
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#include "socket-util.h"
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#include "util.h"
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#include "openflow.h"
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#include "ofp-print.h"
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#include "packets.h"
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#include "poll-loop.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[128];
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int fd;
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sprintf(bind_path, "/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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return -fd;
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}
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return new_stream_vconn(name, fd, check_connection_completion(fd),
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0, vconnp);
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}
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struct vconn_class unix_vconn_class = {
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.name = "unix",
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.open = unix_open,
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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, char *suffix, struct vconn **vconnp)
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{
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int fd;
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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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return new_pstream_vconn("punix", fd, punix_accept, vconnp);
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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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char name[128];
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if (sa_len >= offsetof(struct sockaddr_un, sun_path)) {
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snprintf(name, sizeof name, "unix:%.*s",
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(int) (sa_len - offsetof(struct sockaddr_un, sun_path)),
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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, 0, vconnp);
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}
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struct vconn_class punix_vconn_class = {
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.name = "punix",
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.open = punix_open,
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};
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