*/
#include <config.h>
-#include "vconn.h"
+#include "vconn-provider.h"
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
static struct vconn_class *vconn_classes[] = {
&tcp_vconn_class,
- &ptcp_vconn_class,
+ &unix_vconn_class,
#ifdef HAVE_NETLINK
&netlink_vconn_class,
#endif
#ifdef HAVE_OPENSSL
&ssl_vconn_class,
- &pssl_vconn_class,
#endif
- &unix_vconn_class,
- &punix_vconn_class,
};
+static struct pvconn_class *pvconn_classes[] = {
+ &ptcp_pvconn_class,
+ &punix_pvconn_class,
+#ifdef HAVE_OPENSSL
+ &pssl_pvconn_class,
+#endif
+};
+
+/* High rate limit because most of the rate-limiting here is individual
+ * OpenFlow messages going over the vconn. If those are enabled then we
+ * really need to see them. */
+static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(600, 600);
+
/* Check the validity of the vconn class structures. */
static void
check_vconn_classes(void)
struct vconn_class *class = vconn_classes[i];
assert(class->name != NULL);
assert(class->open != NULL);
- if (class->close || class->accept || class->recv || class->send
- || class->wait) {
+ if (class->close || class->recv || class->send || class->wait) {
+ assert(class->close != NULL);
+ assert(class->recv != NULL);
+ assert(class->send != NULL);
+ assert(class->wait != NULL);
+ } else {
+ /* This class delegates to another one. */
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pvconn_classes); i++) {
+ struct pvconn_class *class = pvconn_classes[i];
+ assert(class->name != NULL);
+ assert(class->listen != NULL);
+ if (class->close || class->accept || class->wait) {
assert(class->close != NULL);
- assert(class->accept
- ? !class->recv && !class->send
- : class->recv && class->send);
+ assert(class->accept != NULL);
assert(class->wait != NULL);
} else {
/* This class delegates to another one. */
}
/* Attempts to connect to an OpenFlow device. 'name' is a connection name in
- * the form "TYPE:ARGS", where TYPE is the vconn class's name and ARGS are
- * vconn class-specific.
+ * the form "TYPE:ARGS", where TYPE is an active vconn class's name and ARGS
+ * are vconn class-specific.
*
* Returns 0 if successful, otherwise a positive errno value. If successful,
* stores a pointer to the new connection in '*vconnp', otherwise a null
*vconnp = NULL;
prefix_len = strcspn(name, ":");
if (prefix_len == strlen(name)) {
- error(0, "`%s' not correct format for peer name", name);
return EAFNOSUPPORT;
}
for (i = 0; i < ARRAY_SIZE(vconn_classes); i++) {
return retval;
}
}
- error(0, "unknown peer type `%.*s'", (int) prefix_len, name);
return EAFNOSUPPORT;
}
vconn_close(struct vconn *vconn)
{
if (vconn != NULL) {
+ char *name = vconn->name;
(vconn->class->close)(vconn);
+ free(name);
}
}
-/* Returns true if 'vconn' is a passive vconn, that is, its purpose is to
- * wait for connections to arrive, not to transfer data. Returns false if
- * 'vconn' is an active vconn, that is, its purpose is to transfer data, not
- * to wait for new connections to arrive. */
-bool
-vconn_is_passive(const struct vconn *vconn)
+/* Returns the name of 'vconn', that is, the string passed to vconn_open(). */
+const char *
+vconn_get_name(const struct vconn *vconn)
{
- return vconn->class->accept != NULL;
+ return vconn->name;
}
/* Returns the IP address of the peer, or 0 if the peer is not connected over
return vconn->connect_status;
}
-/* Tries to accept a new connection on 'vconn', which must be a passive vconn.
- * If successful, stores the new connection in '*new_vconn' and returns 0.
- * Otherwise, returns a positive errno value.
- *
- * vconn_accept will not block waiting for a connection. If no connection is
- * ready to be accepted, it returns EAGAIN immediately. */
-int
-vconn_accept(struct vconn *vconn, struct vconn **new_vconn)
-{
- int retval;
-
- retval = (vconn->class->accept)(vconn, new_vconn);
-
- if (retval) {
- *new_vconn = NULL;
- } else {
- assert((*new_vconn)->connect_status != EAGAIN
- || (*new_vconn)->class->connect);
- }
- return retval;
-}
-
/* Tries to receive an OpenFlow message from 'vconn', which must be an active
* vconn. If successful, stores the received message into '*msgp' and returns
* 0. The caller is responsible for destroying the message with
if (VLOG_IS_DBG_ENABLED()) {
char *s = ofp_to_string((*msgp)->data, (*msgp)->size, 1);
- VLOG_DBG("received: %s", s);
+ VLOG_DBG_RL(&rl, "%s: received: %s", vconn->name, s);
free(s);
}
oh = buffer_at_assert(*msgp, 0, sizeof *oh);
if (oh->version != OFP_VERSION) {
- VLOG_ERR("received OpenFlow version %02"PRIx8" "
- "!= expected %02x",
- oh->version, OFP_VERSION);
+ VLOG_ERR_RL(&rl, "%s: received OpenFlow version %02"PRIx8" "
+ "!= expected %02x",
+ vconn->name, oh->version, OFP_VERSION);
buffer_delete(*msgp);
*msgp = NULL;
return EPROTO;
char *s = ofp_to_string(msg->data, msg->size, 1);
retval = (vconn->class->send)(vconn, msg);
if (retval != EAGAIN) {
- VLOG_DBG("sent (%s): %s", strerror(retval), s);
+ VLOG_DBG_RL(&rl, "%s: sent (%s): %s", vconn->name, strerror(retval), s);
}
free(s);
}
int retval;
while ((retval = vconn_send(vconn, msg)) == EAGAIN) {
vconn_send_wait(vconn);
- VLOG_DBG("blocking on vconn send");
poll_block();
}
return retval;
int retval;
while ((retval = vconn_recv(vconn, msgp)) == EAGAIN) {
vconn_recv_wait(vconn);
- VLOG_DBG("blocking on vconn receive");
poll_block();
}
return retval;
return 0;
}
- VLOG_DBG("received reply with xid %08"PRIx32" != expected %08"PRIx32,
- recv_xid, send_xid);
+ VLOG_DBG_RL(&rl, "%s: received reply with xid %08"PRIx32" != expected "
+ "%08"PRIx32, vconn->name, recv_xid, send_xid);
buffer_delete(reply);
}
}
{
int connect_status;
- assert(vconn_is_passive(vconn)
- ? wait == WAIT_ACCEPT || wait == WAIT_CONNECT
- : wait == WAIT_CONNECT || wait == WAIT_RECV || wait == WAIT_SEND);
+ assert(wait == WAIT_CONNECT || wait == WAIT_RECV || wait == WAIT_SEND);
connect_status = vconn_connect(vconn);
if (connect_status) {
vconn_wait(vconn, WAIT_CONNECT);
}
-void
-vconn_accept_wait(struct vconn *vconn)
-{
- vconn_wait(vconn, WAIT_ACCEPT);
-}
-
void
vconn_recv_wait(struct vconn *vconn)
{
vconn_wait(vconn, WAIT_SEND);
}
+/* Attempts to start listening for OpenFlow connections. 'name' is a
+ * connection name in the form "TYPE:ARGS", where TYPE is an passive vconn
+ * class's name and ARGS are vconn class-specific.
+ *
+ * Returns 0 if successful, otherwise a positive errno value. If successful,
+ * stores a pointer to the new connection in '*pvconnp', otherwise a null
+ * pointer. */
+int
+pvconn_open(const char *name, struct pvconn **pvconnp)
+{
+ size_t prefix_len;
+ size_t i;
+
+ check_vconn_classes();
+
+ *pvconnp = NULL;
+ prefix_len = strcspn(name, ":");
+ if (prefix_len == strlen(name)) {
+ return EAFNOSUPPORT;
+ }
+ for (i = 0; i < ARRAY_SIZE(pvconn_classes); i++) {
+ struct pvconn_class *class = pvconn_classes[i];
+ if (strlen(class->name) == prefix_len
+ && !memcmp(class->name, name, prefix_len)) {
+ char *suffix_copy = xstrdup(name + prefix_len + 1);
+ int retval = class->listen(name, suffix_copy, pvconnp);
+ free(suffix_copy);
+ if (retval) {
+ *pvconnp = NULL;
+ }
+ return retval;
+ }
+ }
+ return EAFNOSUPPORT;
+}
+
+/* Closes 'pvconn'. */
+void
+pvconn_close(struct pvconn *pvconn)
+{
+ if (pvconn != NULL) {
+ char *name = pvconn->name;
+ (pvconn->class->close)(pvconn);
+ free(name);
+ }
+}
+
+/* Tries to accept a new connection on 'pvconn'. If successful, stores the new
+ * connection in '*new_vconn' and returns 0. Otherwise, returns a positive
+ * errno value.
+ *
+ * pvconn_accept() will not block waiting for a connection. If no connection
+ * is ready to be accepted, it returns EAGAIN immediately. */
+int
+pvconn_accept(struct pvconn *pvconn, struct vconn **new_vconn)
+{
+ int retval = (pvconn->class->accept)(pvconn, new_vconn);
+ if (retval) {
+ *new_vconn = NULL;
+ } else {
+ assert((*new_vconn)->connect_status == 0
+ || (*new_vconn)->class->connect);
+ }
+ return retval;
+}
+
+void
+pvconn_wait(struct pvconn *pvconn)
+{
+ (pvconn->class->wait)(pvconn);
+}
+
/* Allocates and returns the first byte of a buffer 'openflow_len' bytes long,
* containing an OpenFlow header with the given 'type' and a random transaction
* id. Stores the new buffer in '*bufferp'. The caller must free the buffer
size_t size = sizeof *opo + sizeof opo->actions[0];
struct buffer *out = buffer_new(size + packet->size);
opo = buffer_put_uninit(out, size);
- memset(opo, 0, sizeof *opo);
+ memset(opo, 0, size);
opo->header.version = OFP_VERSION;
opo->header.type = OFPT_PACKET_OUT;
opo->buffer_id = htonl(UINT32_MAX);
reply->type = OFPT_ECHO_REPLY;
return out;
}
+
+void
+vconn_init(struct vconn *vconn, struct vconn_class *class, int connect_status,
+ uint32_t ip, const char *name)
+{
+ vconn->class = class;
+ vconn->connect_status = connect_status;
+ vconn->ip = ip;
+ vconn->name = xstrdup(name);
+}
+
+void
+pvconn_init(struct pvconn *pvconn, struct pvconn_class *class,
+ const char *name)
+{
+ pvconn->class = class;
+ pvconn->name = xstrdup(name);
+}
projects / openvswitch / blobdiff