2 * Copyright (c) 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #include "stream-fd.h"
23 #include <sys/types.h>
26 #include "fatal-signal.h"
27 #include "poll-loop.h"
28 #include "socket-util.h"
30 #include "stream-provider.h"
34 VLOG_DEFINE_THIS_MODULE(stream_fd_windows);
36 /* Active file descriptor stream. */
44 static const struct stream_class stream_fd_class;
46 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 25);
48 /* Creates a new stream named 'name' that will send and receive data on 'fd'
49 * and stores a pointer to the stream in '*streamp'. Initial connection status
50 * 'connect_status' is interpreted as described for stream_init().
52 * Returns 0 if successful, otherwise a positive errno value. (The current
53 * implementation never fails.) */
55 new_fd_stream(const char *name, int fd, int connect_status,
56 struct stream **streamp)
60 s = xmalloc(sizeof *s);
61 stream_init(&s->stream, &stream_fd_class, connect_status, name);
63 *streamp = &s->stream;
67 static struct stream_fd *
68 stream_fd_cast(struct stream *stream)
70 stream_assert_class(stream, &stream_fd_class);
71 return CONTAINER_OF(stream, struct stream_fd, stream);
75 fd_close(struct stream *stream)
77 struct stream_fd *s = stream_fd_cast(stream);
83 fd_connect(struct stream *stream)
85 struct stream_fd *s = stream_fd_cast(stream);
86 return check_connection_completion(s->fd);
90 fd_recv(struct stream *stream, void *buffer, size_t n)
92 struct stream_fd *s = stream_fd_cast(stream);
95 retval = recv(s->fd, buffer, n, 0);
97 retval = -sock_errno();
99 if (retval == -WSAEWOULDBLOCK) {
106 fd_send(struct stream *stream, const void *buffer, size_t n)
108 struct stream_fd *s = stream_fd_cast(stream);
111 retval = send(s->fd, buffer, n, 0);
113 retval = -sock_errno();
115 if (retval == -WSAEWOULDBLOCK) {
123 fd_wait(struct stream *stream, enum stream_wait_type wait)
125 struct stream_fd *s = stream_fd_cast(stream);
129 poll_fd_wait(s->fd, POLLOUT);
133 poll_fd_wait(s->fd, POLLIN);
141 static const struct stream_class stream_fd_class = {
143 false, /* needs_probes */
145 fd_close, /* close */
146 fd_connect, /* connect */
154 /* Passive file descriptor stream. */
158 struct pstream pstream;
160 int (*accept_cb)(int fd, const struct sockaddr_storage *, size_t ss_len,
162 int (*set_dscp_cb)(int fd, uint8_t dscp);
166 static const struct pstream_class fd_pstream_class;
168 static struct fd_pstream *
169 fd_pstream_cast(struct pstream *pstream)
171 pstream_assert_class(pstream, &fd_pstream_class);
172 return CONTAINER_OF(pstream, struct fd_pstream, pstream);
175 /* Creates a new pstream named 'name' that will accept new socket connections
176 * on 'fd' and stores a pointer to the stream in '*pstreamp'.
178 * When a connection has been accepted, 'accept_cb' will be called with the new
179 * socket fd 'fd' and the remote address of the connection 'sa' and 'sa_len'.
180 * accept_cb must return 0 if the connection is successful, in which case it
181 * must initialize '*streamp' to the new stream, or a positive errno value on
182 * error. In either case accept_cb takes ownership of the 'fd' passed in.
184 * When '*pstreamp' is closed, then 'unlink_path' (if nonnull) will be passed
185 * to fatal_signal_unlink_file_now() and freed with free().
187 * Returns 0 if successful, otherwise a positive errno value. (The current
188 * implementation never fails.) */
190 new_fd_pstream(const char *name, int fd,
191 int (*accept_cb)(int fd, const struct sockaddr_storage *ss,
192 size_t ss_len, struct stream **streamp),
193 int (*set_dscp_cb)(int fd, uint8_t dscp),
194 char *unlink_path, struct pstream **pstreamp)
196 struct fd_pstream *ps = xmalloc(sizeof *ps);
197 pstream_init(&ps->pstream, &fd_pstream_class, name);
199 ps->accept_cb = accept_cb;
200 ps->set_dscp_cb = set_dscp_cb;
201 ps->unlink_path = unlink_path;
202 *pstreamp = &ps->pstream;
207 pfd_close(struct pstream *pstream)
209 struct fd_pstream *ps = fd_pstream_cast(pstream);
211 if (ps->unlink_path) {
212 fatal_signal_unlink_file_now(ps->unlink_path);
213 free(ps->unlink_path);
219 pfd_accept(struct pstream *pstream, struct stream **new_streamp)
221 struct fd_pstream *ps = fd_pstream_cast(pstream);
222 struct sockaddr_storage ss;
223 socklen_t ss_len = sizeof ss;
227 new_fd = accept(ps->fd, (struct sockaddr *) &ss, &ss_len);
229 retval = sock_errno();
230 if (retval == WSAEWOULDBLOCK) {
236 retval = set_nonblocking(new_fd);
242 return ps->accept_cb(new_fd, &ss, ss_len, new_streamp);
246 pfd_wait(struct pstream *pstream)
248 struct fd_pstream *ps = fd_pstream_cast(pstream);
249 poll_fd_wait(ps->fd, POLLIN);
253 pfd_set_dscp(struct pstream *pstream, uint8_t dscp)
255 struct fd_pstream *ps = fd_pstream_cast(pstream);
256 if (ps->set_dscp_cb) {
257 return ps->set_dscp_cb(ps->fd, dscp);
262 static const struct pstream_class fd_pstream_class = {