--- /dev/null
+/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ *
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
+ */
+
+#ifndef VCONN_STREAM_H
+#define VCONN_STREAM_H 1
+
+#include <stddef.h>
+#include <stdint.h>
+
+struct vconn;
+struct sockaddr;
+
+int new_stream_vconn(const char *name, int fd, int connect_status,
+ uint32_t ip, struct vconn **vconnp);
+int new_pstream_vconn(const char *name, int fd,
+ int (*accept_cb)(int fd, const struct sockaddr *,
+ size_t sa_len, struct vconn **),
+ struct vconn **vconnp);
+
+#endif /* vconn-stream.h */
--- /dev/null
+/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ *
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
+ */
+
+#include <config.h>
+#include "vconn-stream.h"
+#include <assert.h>
+#include <errno.h>
+#include <poll.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "buffer.h"
+#include "util.h"
+#include "openflow.h"
+#include "poll-loop.h"
+#include "socket-util.h"
+#include "vconn.h"
+
+#include "vlog.h"
+#define THIS_MODULE VLM_vconn_stream
+
+/* Active stream socket vconn. */
+
+struct stream_vconn
+{
+ struct vconn vconn;
+ int fd;
+ struct buffer *rxbuf;
+ struct buffer *txbuf;
+ struct poll_waiter *tx_waiter;
+};
+
+static struct vconn_class stream_vconn_class;
+
+int
+new_stream_vconn(const char *name, int fd, int connect_status,
+ uint32_t ip, struct vconn **vconnp)
+{
+ struct stream_vconn *s;
+
+ s = xmalloc(sizeof *s);
+ s->vconn.class = &stream_vconn_class;
+ s->vconn.connect_status = connect_status;
+ s->vconn.ip = ip;
+ s->fd = fd;
+ s->txbuf = NULL;
+ s->tx_waiter = NULL;
+ s->rxbuf = NULL;
+ *vconnp = &s->vconn;
+ return 0;
+}
+
+static struct stream_vconn *
+stream_vconn_cast(struct vconn *vconn)
+{
+ assert(vconn->class == &stream_vconn_class);
+ return CONTAINER_OF(vconn, struct stream_vconn, vconn);
+}
+
+static void
+stream_close(struct vconn *vconn)
+{
+ struct stream_vconn *s = stream_vconn_cast(vconn);
+ poll_cancel(s->tx_waiter);
+ close(s->fd);
+ free(s);
+}
+
+static int
+stream_connect(struct vconn *vconn)
+{
+ struct stream_vconn *s = stream_vconn_cast(vconn);
+ return check_connection_completion(s->fd);
+}
+
+static int
+stream_recv(struct vconn *vconn, struct buffer **bufferp)
+{
+ struct stream_vconn *s = stream_vconn_cast(vconn);
+ struct buffer *rx;
+ size_t want_bytes;
+ ssize_t retval;
+
+ if (s->rxbuf == NULL) {
+ s->rxbuf = buffer_new(1564);
+ }
+ rx = s->rxbuf;
+
+again:
+ if (sizeof(struct ofp_header) > rx->size) {
+ want_bytes = sizeof(struct ofp_header) - rx->size;
+ } else {
+ struct ofp_header *oh = rx->data;
+ size_t length = ntohs(oh->length);
+ if (length < sizeof(struct ofp_header)) {
+ VLOG_ERR("received too-short ofp_header (%zu bytes)", length);
+ return EPROTO;
+ }
+ want_bytes = length - rx->size;
+ if (!want_bytes) {
+ *bufferp = rx;
+ s->rxbuf = NULL;
+ return 0;
+ }
+ }
+ buffer_prealloc_tailroom(rx, want_bytes);
+
+ retval = read(s->fd, buffer_tail(rx), want_bytes);
+ if (retval > 0) {
+ rx->size += retval;
+ if (retval == want_bytes) {
+ if (rx->size > sizeof(struct ofp_header)) {
+ *bufferp = rx;
+ s->rxbuf = NULL;
+ return 0;
+ } else {
+ goto again;
+ }
+ }
+ return EAGAIN;
+ } else if (retval == 0) {
+ if (rx->size) {
+ VLOG_ERR("connection dropped mid-packet");
+ return EPROTO;
+ } else {
+ return EOF;
+ }
+ } else {
+ return retval ? errno : EAGAIN;
+ }
+}
+
+static void
+stream_clear_txbuf(struct stream_vconn *s)
+{
+ buffer_delete(s->txbuf);
+ s->txbuf = NULL;
+ s->tx_waiter = NULL;
+}
+
+static void
+stream_do_tx(int fd UNUSED, short int revents UNUSED, void *vconn_)
+{
+ struct vconn *vconn = vconn_;
+ struct stream_vconn *s = stream_vconn_cast(vconn);
+ ssize_t n = write(s->fd, s->txbuf->data, s->txbuf->size);
+ if (n < 0) {
+ if (errno != EAGAIN) {
+ VLOG_ERR("send: %s", strerror(errno));
+ stream_clear_txbuf(s);
+ return;
+ }
+ } else if (n > 0) {
+ buffer_pull(s->txbuf, n);
+ if (!s->txbuf->size) {
+ stream_clear_txbuf(s);
+ return;
+ }
+ }
+ s->tx_waiter = poll_fd_callback(s->fd, POLLOUT, stream_do_tx, vconn);
+}
+
+static int
+stream_send(struct vconn *vconn, struct buffer *buffer)
+{
+ struct stream_vconn *s = stream_vconn_cast(vconn);
+ ssize_t retval;
+
+ if (s->txbuf) {
+ return EAGAIN;
+ }
+
+ retval = write(s->fd, buffer->data, buffer->size);
+ if (retval == buffer->size) {
+ buffer_delete(buffer);
+ return 0;
+ } else if (retval >= 0 || errno == EAGAIN) {
+ s->txbuf = buffer;
+ if (retval > 0) {
+ buffer_pull(buffer, retval);
+ }
+ s->tx_waiter = poll_fd_callback(s->fd, POLLOUT, stream_do_tx, vconn);
+ return 0;
+ } else {
+ return errno;
+ }
+}
+
+static void
+stream_wait(struct vconn *vconn, enum vconn_wait_type wait)
+{
+ struct stream_vconn *s = stream_vconn_cast(vconn);
+ switch (wait) {
+ case WAIT_CONNECT:
+ poll_fd_wait(s->fd, POLLOUT);
+ break;
+
+ case WAIT_SEND:
+ if (!s->txbuf) {
+ poll_fd_wait(s->fd, POLLOUT);
+ } else {
+ /* Nothing to do: need to drain txbuf first. */
+ }
+ break;
+
+ case WAIT_RECV:
+ poll_fd_wait(s->fd, POLLIN);
+ break;
+
+ default:
+ NOT_REACHED();
+ }
+}
+
+static struct vconn_class stream_vconn_class = {
+ .name = "stream",
+ .close = stream_close,
+ .connect = stream_connect,
+ .recv = stream_recv,
+ .send = stream_send,
+ .wait = stream_wait,
+};
+\f
+/* Passive stream socket vconn. */
+
+struct pstream_vconn
+{
+ struct vconn vconn;
+ int fd;
+ int (*accept_cb)(int fd, const struct sockaddr *, size_t sa_len,
+ struct vconn **);
+};
+
+static struct vconn_class pstream_vconn_class;
+
+static struct pstream_vconn *
+pstream_vconn_cast(struct vconn *vconn)
+{
+ assert(vconn->class == &pstream_vconn_class);
+ return CONTAINER_OF(vconn, struct pstream_vconn, vconn);
+}
+
+int
+new_pstream_vconn(const char *name, int fd,
+ int (*accept_cb)(int fd, const struct sockaddr *,
+ size_t sa_len, struct vconn **),
+ struct vconn **vconnp)
+{
+ struct pstream_vconn *ps;
+ int retval;
+
+ retval = set_nonblocking(fd);
+ if (retval) {
+ close(fd);
+ return retval;
+ }
+
+ if (listen(fd, 10) < 0) {
+ int error = errno;
+ VLOG_ERR("%s: listen: %s", name, strerror(error));
+ close(fd);
+ return error;
+ }
+
+ ps = xmalloc(sizeof *ps);
+ ps->vconn.class = &pstream_vconn_class;
+ ps->vconn.connect_status = 0;
+ ps->fd = fd;
+ ps->accept_cb = accept_cb;
+ *vconnp = &ps->vconn;
+ return 0;
+}
+
+static void
+pstream_close(struct vconn *vconn)
+{
+ struct pstream_vconn *ps = pstream_vconn_cast(vconn);
+ close(ps->fd);
+ free(ps);
+}
+
+static int
+pstream_accept(struct vconn *vconn, struct vconn **new_vconnp)
+{
+ struct pstream_vconn *ps = pstream_vconn_cast(vconn);
+ struct sockaddr_storage ss;
+ socklen_t ss_len = sizeof ss;
+ int new_fd;
+ int retval;
+
+ new_fd = accept(ps->fd, (struct sockaddr *) &ss, &ss_len);
+ if (new_fd < 0) {
+ int retval = errno;
+ if (retval != EAGAIN) {
+ VLOG_DBG("accept: %s", strerror(retval));
+ }
+ return retval;
+ }
+
+ retval = set_nonblocking(new_fd);
+ if (retval) {
+ close(new_fd);
+ return retval;
+ }
+
+ return ps->accept_cb(new_fd, (const struct sockaddr *) &ss, ss_len,
+ new_vconnp);
+}
+
+static void
+pstream_wait(struct vconn *vconn, enum vconn_wait_type wait)
+{
+ struct pstream_vconn *ps = pstream_vconn_cast(vconn);
+ assert(wait == WAIT_ACCEPT);
+ poll_fd_wait(ps->fd, POLLIN);
+}
+
+static struct vconn_class pstream_vconn_class = {
+ .name = "pstream",
+ .close = pstream_close,
+ .accept = pstream_accept,
+ .wait = pstream_wait
+};
projects / openvswitch / commitdiff