2 * Copyright (c) 2008, 2009, 2010 Nicira Networks.
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.
23 #include <sys/types.h>
25 #include "fatal-signal.h"
26 #include "leak-checker.h"
28 #include "openflow/openflow.h"
29 #include "poll-loop.h"
30 #include "socket-util.h"
33 #include "vconn-provider.h"
37 #define THIS_MODULE VLM_vconn_stream
39 /* Active stream socket vconn. */
44 struct stream *stream;
49 static struct vconn_class stream_vconn_class;
51 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 25);
53 static void vconn_stream_clear_txbuf(struct vconn_stream *);
54 static int count_fields(const char *);
57 vconn_stream_new(struct stream *stream, int connect_status)
59 struct vconn_stream *s;
61 s = xmalloc(sizeof *s);
62 vconn_init(&s->vconn, &stream_vconn_class, connect_status,
63 stream_get_name(stream));
67 s->vconn.remote_ip = stream_get_remote_ip(stream);
68 s->vconn.remote_port = stream_get_remote_port(stream);
69 s->vconn.local_ip = stream_get_local_ip(stream);
70 s->vconn.local_port = stream_get_local_port(stream);
74 /* Creates a new vconn that will send and receive data on a stream named 'name'
75 * and stores a pointer to the vconn in '*vconnp'.
77 * Returns 0 if successful, otherwise a positive errno value. */
79 vconn_stream_open(const char *name_, char *suffix OVS_UNUSED,
80 struct vconn **vconnp)
82 struct stream *stream;
86 if (!strncmp(name_, "tcp:", 4) && count_fields(name_) < 3) {
87 name = xasprintf("%s:%d", name_, OFP_TCP_PORT);
88 } else if (!strncmp(name_, "ssl:", 4) && count_fields(name_) < 3) {
89 name = xasprintf("%s:%d", name_, OFP_SSL_PORT);
91 name = xstrdup(name_);
93 error = stream_open(name, &stream);
96 if (error && error != EAGAIN) {
100 *vconnp = vconn_stream_new(stream, error);
104 static struct vconn_stream *
105 vconn_stream_cast(struct vconn *vconn)
107 return CONTAINER_OF(vconn, struct vconn_stream, vconn);
111 vconn_stream_close(struct vconn *vconn)
113 struct vconn_stream *s = vconn_stream_cast(vconn);
114 stream_close(s->stream);
115 vconn_stream_clear_txbuf(s);
116 ofpbuf_delete(s->rxbuf);
121 vconn_stream_connect(struct vconn *vconn)
123 struct vconn_stream *s = vconn_stream_cast(vconn);
124 return stream_connect(s->stream);
128 vconn_stream_recv(struct vconn *vconn, struct ofpbuf **bufferp)
130 struct vconn_stream *s = vconn_stream_cast(vconn);
135 if (s->rxbuf == NULL) {
136 s->rxbuf = ofpbuf_new(1564);
141 if (sizeof(struct ofp_header) > rx->size) {
142 want_bytes = sizeof(struct ofp_header) - rx->size;
144 struct ofp_header *oh = rx->data;
145 size_t length = ntohs(oh->length);
146 if (length < sizeof(struct ofp_header)) {
147 VLOG_ERR_RL(&rl, "received too-short ofp_header (%zu bytes)",
151 want_bytes = length - rx->size;
158 ofpbuf_prealloc_tailroom(rx, want_bytes);
160 retval = stream_recv(s->stream, ofpbuf_tail(rx), want_bytes);
163 if (retval == want_bytes) {
164 if (rx->size > sizeof(struct ofp_header)) {
173 } else if (retval == 0) {
175 VLOG_ERR_RL(&rl, "connection dropped mid-packet");
186 vconn_stream_clear_txbuf(struct vconn_stream *s)
188 ofpbuf_delete(s->txbuf);
193 vconn_stream_send(struct vconn *vconn, struct ofpbuf *buffer)
195 struct vconn_stream *s = vconn_stream_cast(vconn);
202 retval = stream_send(s->stream, buffer->data, buffer->size);
203 if (retval == buffer->size) {
204 ofpbuf_delete(buffer);
206 } else if (retval >= 0 || retval == -EAGAIN) {
207 leak_checker_claim(buffer);
210 ofpbuf_pull(buffer, retval);
219 vconn_stream_run(struct vconn *vconn)
221 struct vconn_stream *s = vconn_stream_cast(vconn);
228 retval = stream_send(s->stream, s->txbuf->data, s->txbuf->size);
230 if (retval != -EAGAIN) {
231 VLOG_ERR_RL(&rl, "send: %s", strerror(-retval));
232 vconn_stream_clear_txbuf(s);
235 } else if (retval > 0) {
236 ofpbuf_pull(s->txbuf, retval);
237 if (!s->txbuf->size) {
238 vconn_stream_clear_txbuf(s);
245 vconn_stream_run_wait(struct vconn *vconn)
247 struct vconn_stream *s = vconn_stream_cast(vconn);
250 stream_send_wait(s->stream);
255 vconn_stream_wait(struct vconn *vconn, enum vconn_wait_type wait)
257 struct vconn_stream *s = vconn_stream_cast(vconn);
260 stream_connect_wait(s->stream);
265 stream_send_wait(s->stream);
267 /* Nothing to do: need to drain txbuf first.
268 * vconn_stream_run_wait() will arrange to wake up when there room
269 * to send data, so there's no point in calling poll_fd_wait()
270 * redundantly here. */
275 stream_recv_wait(s->stream);
283 /* Passive stream socket vconn. */
285 struct pvconn_pstream
287 struct pvconn pvconn;
288 struct pstream *pstream;
291 static struct pvconn_class pstream_pvconn_class;
293 static struct pvconn_pstream *
294 pvconn_pstream_cast(struct pvconn *pvconn)
296 return CONTAINER_OF(pvconn, struct pvconn_pstream, pvconn);
299 /* Creates a new pvconn named 'name' that will accept new connections using
300 * pstream_accept() and stores a pointer to the pvconn in '*pvconnp'.
302 * Returns 0 if successful, otherwise a positive errno value. (The current
303 * implementation never fails.) */
305 pvconn_pstream_listen(const char *name_, char *suffix OVS_UNUSED,
306 struct pvconn **pvconnp)
308 struct pvconn_pstream *ps;
309 struct pstream *pstream;
313 if (!strncmp(name_, "ptcp:", 5) && count_fields(name_) < 2) {
314 name = xasprintf("%s%d", name_, OFP_TCP_PORT);
315 } else if (!strncmp(name_, "pssl:", 5) && count_fields(name_) < 2) {
316 name = xasprintf("%s%d", name_, OFP_SSL_PORT);
318 name = xstrdup(name_);
320 error = pstream_open(name, &pstream);
326 ps = xmalloc(sizeof *ps);
327 pvconn_init(&ps->pvconn, &pstream_pvconn_class, name_);
328 ps->pstream = pstream;
329 *pvconnp = &ps->pvconn;
334 pvconn_pstream_close(struct pvconn *pvconn)
336 struct pvconn_pstream *ps = pvconn_pstream_cast(pvconn);
337 pstream_close(ps->pstream);
342 pvconn_pstream_accept(struct pvconn *pvconn, struct vconn **new_vconnp)
344 struct pvconn_pstream *ps = pvconn_pstream_cast(pvconn);
345 struct stream *stream;
348 error = pstream_accept(ps->pstream, &stream);
350 if (error != EAGAIN) {
351 VLOG_DBG_RL(&rl, "%s: accept: %s",
352 pstream_get_name(ps->pstream), strerror(error));
357 *new_vconnp = vconn_stream_new(stream, 0);
362 pvconn_pstream_wait(struct pvconn *pvconn)
364 struct pvconn_pstream *ps = pvconn_pstream_cast(pvconn);
365 pstream_wait(ps->pstream);
369 count_fields(const char *s_)
371 char *s, *field, *save_ptr;
376 for (field = strtok_r(s, ":", &save_ptr); field != NULL;
377 field = strtok_r(NULL, ":", &save_ptr)) {
385 /* Stream-based vconns and pvconns. */
387 #define DEFINE_VCONN_STREAM_CLASS(NAME) \
388 struct vconn_class NAME##_vconn_class = { \
391 vconn_stream_close, \
392 vconn_stream_connect, \
396 vconn_stream_run_wait, \
400 #define DEFINE_PVCONN_STREAM_CLASS(NAME) \
401 struct pvconn_class NAME##_pvconn_class = { \
403 pvconn_pstream_listen, \
404 pvconn_pstream_close, \
405 pvconn_pstream_accept, \
406 pvconn_pstream_wait \
409 static DEFINE_VCONN_STREAM_CLASS(stream);
410 static DEFINE_PVCONN_STREAM_CLASS(pstream);
412 DEFINE_VCONN_STREAM_CLASS(tcp);
413 DEFINE_PVCONN_STREAM_CLASS(ptcp);
415 DEFINE_VCONN_STREAM_CLASS(unix);
416 DEFINE_PVCONN_STREAM_CLASS(punix);
419 DEFINE_VCONN_STREAM_CLASS(ssl);
420 DEFINE_PVCONN_STREAM_CLASS(pssl);