#include "vconn.h"
#include <assert.h>
#include <errno.h>
+#include <inttypes.h>
#include <netinet/in.h>
#include <poll.h>
#include <stdlib.h>
#include "ofp-print.h"
#include "openflow.h"
#include "poll-loop.h"
+#include "random.h"
#include "util.h"
#define THIS_MODULE VLM_vconn
#endif
}
+/* Prints information on active (if 'active') and passive (if 'passive')
+ * connection methods supported by the vconn. */
+void
+vconn_usage(bool active, bool passive)
+{
+ /* Really this should be implemented via callbacks into the vconn
+ * providers, but that seems too heavy-weight to bother with at the
+ * moment. */
+
+ printf("\n");
+ if (active) {
+ printf("Active OpenFlow connection methods:\n");
+#ifdef HAVE_NETLINK
+ printf(" nl:DP_IDX "
+ "local datapath DP_IDX\n");
+#endif
+ printf(" tcp:HOST[:PORT] "
+ "PORT (default: %d) on remote TCP HOST\n", OFP_TCP_PORT);
+#ifdef HAVE_OPENSSL
+ printf(" ssl:HOST[:PORT] "
+ "SSL PORT (default: %d) on remote HOST\n", OFP_SSL_PORT);
+#endif
+ }
+
+ if (passive) {
+ printf("Passive OpenFlow connection methods:\n");
+ printf(" ptcp:[PORT] "
+ "listen to TCP PORT (default: %d)\n",
+ OFP_TCP_PORT);
+#ifdef HAVE_OPENSSL
+ printf(" pssl:[PORT] "
+ "listen for SSL on PORT (default: %d)\n",
+ OFP_SSL_PORT);
+#endif
+ }
+
+#ifdef HAVE_OPENSSL
+ printf("PKI configuration (required to use SSL):\n"
+ " -p, --private-key=FILE file with private key\n"
+ " -c, --certificate=FILE file with certificate for private key\n"
+ " -C, --ca-cert=FILE file with peer CA certificate\n");
+#endif
+}
+
/* 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.
prefix_len = strcspn(name, ":");
if (prefix_len == strlen(name)) {
- fatal(0, "`%s' not correct format for peer name", name);
+ error(0, "`%s' not correct format for peer name", name);
+ return EAFNOSUPPORT;
}
for (i = 0; i < ARRAY_SIZE(vconn_classes); i++) {
struct vconn_class *class = vconn_classes[i];
return retval;
}
}
- fatal(0, "unknown peer type `%.*s'", (int) prefix_len, name);
- abort();
+ error(0, "unknown peer type `%.*s'", (int) prefix_len, name);
+ return EAFNOSUPPORT;
}
int
return vconn->class->accept != NULL;
}
+/* Returns the IP address of the peer, or 0 if the peer is not connected over
+ * an IP-based protocol or if its IP address is not yet known. */
+uint32_t
+vconn_get_ip(const struct vconn *vconn)
+{
+ return vconn->ip;
+}
+
/* Tries to complete the connection on 'vconn', which must be an active
* vconn. If 'vconn''s connection is complete, returns 0 if the connection
* was successful or a positive errno value if it failed. If the
{
int retval = vconn_connect(vconn);
if (!retval) {
+ assert(msg->size >= sizeof(struct ofp_header));
+ assert(((struct ofp_header *) msg->data)->length == htons(msg->size));
if (!VLOG_IS_DBG_ENABLED()) {
retval = (vconn->class->send)(vconn, msg);
} else {
int retval;
while ((retval = vconn_send(vconn, msg)) == EAGAIN) {
vconn_send_wait(vconn);
+ VLOG_DBG("blocking on vconn send");
poll_block();
}
return retval;
}
+/* Same as vconn_recv, except that it waits until a message is received. */
+int
+vconn_recv_block(struct vconn *vconn, struct buffer **msgp)
+{
+ int retval;
+ while ((retval = vconn_recv(vconn, msgp)) == EAGAIN) {
+ vconn_recv_wait(vconn);
+ VLOG_DBG("blocking on vconn receive");
+ poll_block();
+ }
+ return retval;
+}
+
+/* Sends 'request' to 'vconn' and blocks until it receives a reply with a
+ * matching transaction ID. Returns 0 if successful, in which case the reply
+ * is stored in '*replyp' for the caller to examine and free. Otherwise
+ * returns a positive errno value, or EOF, and sets '*replyp' to null.
+ *
+ * 'request' is always destroyed, regardless of the return value. */
+int
+vconn_transact(struct vconn *vconn, struct buffer *request,
+ struct buffer **replyp)
+{
+ uint32_t send_xid = ((struct ofp_header *) request->data)->xid;
+ int error;
+
+ *replyp = NULL;
+ error = vconn_send_block(vconn, request);
+ if (error) {
+ buffer_delete(request);
+ return error;
+ }
+ for (;;) {
+ uint32_t recv_xid;
+ struct buffer *reply;
+
+ error = vconn_recv_block(vconn, &reply);
+ if (error) {
+ return error;
+ }
+ recv_xid = ((struct ofp_header *) reply->data)->xid;
+ if (send_xid == recv_xid) {
+ *replyp = reply;
+ return 0;
+ }
+
+ VLOG_DBG("received reply with xid %08"PRIx32" != expected %08"PRIx32,
+ recv_xid, send_xid);
+ buffer_delete(reply);
+ }
+}
+
void
vconn_wait(struct vconn *vconn, enum vconn_wait_type wait)
{
vconn_wait(vconn, WAIT_SEND);
}
+/* 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
+ * when it is no longer needed. */
+void *
+make_openflow(size_t openflow_len, uint8_t type, struct buffer **bufferp)
+{
+ return make_openflow_xid(openflow_len, type, random_uint32(), bufferp);
+}
+
+/* Allocates and returns the first byte of a buffer 'openflow_len' bytes long,
+ * containing an OpenFlow header with the given 'type' and transaction id
+ * 'xid'. Stores the new buffer in '*bufferp'. The caller must free the
+ * buffer when it is no longer needed. */
+void *
+make_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
+ struct buffer **bufferp)
+{
+ struct buffer *buffer;
+ struct ofp_header *oh;
+
+ assert(openflow_len >= sizeof *oh);
+ assert(openflow_len <= UINT16_MAX);
+ buffer = *bufferp = buffer_new(openflow_len);
+ oh = buffer_put_uninit(buffer, openflow_len);
+ memset(oh, 0, openflow_len);
+ oh->version = OFP_VERSION;
+ oh->type = type;
+ oh->length = htons(openflow_len);
+ oh->xid = xid;
+ return oh;
+}
+
+/* Updates the 'length' field of the OpenFlow message in 'buffer' to
+ * 'buffer->size'. */
+void
+update_openflow_length(struct buffer *buffer)
+{
+ struct ofp_header *oh = buffer_at_assert(buffer, 0, sizeof *oh);
+ oh->length = htons(buffer->size);
+}
+
struct buffer *
make_add_simple_flow(const struct flow *flow,
- uint32_t buffer_id, uint16_t out_port)
+ uint32_t buffer_id, uint16_t out_port, uint16_t max_idle)
{
struct ofp_flow_mod *ofm;
size_t size = sizeof *ofm + sizeof ofm->actions[0];
ofm->match.tp_src = flow->tp_src;
ofm->match.tp_dst = flow->tp_dst;
ofm->command = htons(OFPFC_ADD);
- ofm->max_idle = htons(60);
+ ofm->max_idle = htons(max_idle);
ofm->buffer_id = htonl(buffer_id);
- ofm->group_id = htonl(0);
ofm->actions[0].type = htons(OFPAT_OUTPUT);
ofm->actions[0].arg.output.max_len = htons(0);
ofm->actions[0].arg.output.port = htons(out_port);
return out;
}
+/* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */
+struct buffer *
+make_echo_request(void)
+{
+ struct ofp_header *rq;
+ struct buffer *out = buffer_new(sizeof *rq);
+ rq = buffer_put_uninit(out, sizeof *rq);
+ rq->version = OFP_VERSION;
+ rq->type = OFPT_ECHO_REQUEST;
+ rq->length = htons(sizeof *rq);
+ rq->xid = 0;
+ return out;
+}
+
+/* Creates and returns an OFPT_ECHO_REPLY message matching the
+ * OFPT_ECHO_REQUEST message in 'rq'. */
+struct buffer *
+make_echo_reply(const struct ofp_header *rq)
+{
+ size_t size = ntohs(rq->length);
+ struct buffer *out = buffer_new(size);
+ struct ofp_header *reply = buffer_put(out, rq, size);
+ reply->type = OFPT_ECHO_REPLY;
+ return out;
+}
projects / openvswitch / blobdiff