* derivatives without specific, written prior permission.
*/
+#include <config.h>
#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
&ssl_vconn_class,
&pssl_vconn_class,
#endif
+ &unix_vconn_class,
+ &punix_vconn_class,
};
+/* 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);
- assert(class->close != NULL);
- assert(class->accept
- ? !class->recv && !class->send
- : class->recv && class->send);
- assert(class->wait != NULL);
+ if (class->close || class->accept || class->recv || class->send
+ || class->wait) {
+ assert(class->close != NULL);
+ assert(class->accept
+ ? !class->recv && !class->send
+ : class->recv && class->send);
+ assert(class->wait != NULL);
+ } else {
+ /* This class delegates to another one. */
+ }
+ }
+#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
+ printf(" unix:FILE Unix domain socket named FILE\n");
+ }
+
+ 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
+ printf(" punix:FILE "
+ "listen on Unix domain socket FILE\n");
}
+
+#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
}
check_vconn_classes();
+ *vconnp = NULL;
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];
if (strlen(class->name) == prefix_len
&& !memcmp(class->name, name, prefix_len)) {
+ struct vconn *vconn;
char *suffix_copy = xstrdup(name + prefix_len + 1);
- int retval = class->open(name, suffix_copy, vconnp);
+ int retval = class->open(name, suffix_copy, &vconn);
free(suffix_copy);
- if (retval) {
- *vconnp = NULL;
- } else {
- assert((*vconnp)->connect_status != EAGAIN
- || (*vconnp)->class->connect);
+ if (!retval) {
+ assert(vconn->connect_status != EAGAIN
+ || vconn->class->connect);
+ vconn->name = xstrdup(name);
+ *vconnp = vconn;
}
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
vconn_close(struct vconn *vconn)
{
if (vconn != NULL) {
+ char *name = vconn->name;
(vconn->class->close)(vconn);
+ free(name);
}
}
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) {
retval = (vconn->class->recv)(vconn, msgp);
- if (VLOG_IS_DBG_ENABLED() && !retval) {
- char *s = ofp_to_string((*msgp)->data, (*msgp)->size, 1);
- VLOG_DBG("received: %s", s);
- free(s);
+ if (!retval) {
+ struct ofp_header *oh;
+
+ if (VLOG_IS_DBG_ENABLED()) {
+ char *s = ofp_to_string((*msgp)->data, (*msgp)->size, 1);
+ 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_RL(&rl, "%s: received OpenFlow version %02"PRIx8" "
+ "!= expected %02x",
+ vconn->name, oh->version, OFP_VERSION);
+ buffer_delete(*msgp);
+ *msgp = NULL;
+ return EPROTO;
+ }
}
}
if (retval) {
{
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 {
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);
}
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);
+ 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_RL(&rl, "%s: received reply with xid %08"PRIx32" != expected "
+ "%08"PRIx32, vconn->name, 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)
+make_add_flow(const struct flow *flow, uint32_t buffer_id,
+ uint16_t idle_timeout, size_t n_actions)
{
struct ofp_flow_mod *ofm;
- size_t size = sizeof *ofm + sizeof ofm->actions[0];
+ size_t size = sizeof *ofm + n_actions * sizeof ofm->actions[0];
struct buffer *out = buffer_new(size);
ofm = buffer_put_uninit(out, size);
memset(ofm, 0, size);
ofm->header.version = OFP_VERSION;
ofm->header.type = OFPT_FLOW_MOD;
ofm->header.length = htons(size);
- ofm->match.wildcards = htons(0);
+ ofm->match.wildcards = htonl(0);
ofm->match.in_port = flow->in_port;
memcpy(ofm->match.dl_src, flow->dl_src, sizeof ofm->match.dl_src);
memcpy(ofm->match.dl_dst, flow->dl_dst, sizeof ofm->match.dl_dst);
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->idle_timeout = htons(idle_timeout);
+ ofm->hard_timeout = htons(OFP_FLOW_PERMANENT);
ofm->buffer_id = htonl(buffer_id);
- ofm->group_id = htonl(0);
+ return out;
+}
+
+struct buffer *
+make_add_simple_flow(const struct flow *flow,
+ uint32_t buffer_id, uint16_t out_port,
+ uint16_t idle_timeout)
+{
+ struct buffer *buffer = make_add_flow(flow, buffer_id, idle_timeout, 1);
+ struct ofp_flow_mod *ofm = buffer->data;
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;
+ return buffer;
}
struct buffer *
uint16_t in_port, uint16_t out_port)
{
struct ofp_packet_out *opo;
- size_t size = sizeof *opo + packet->size;
- struct buffer *out = buffer_new(size);
+ 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);
opo->header.version = OFP_VERSION;
opo->header.type = OFPT_PACKET_OUT;
- opo->header.length = htons(size);
opo->buffer_id = htonl(UINT32_MAX);
opo->in_port = htons(in_port);
- opo->out_port = htons(out_port);
- memcpy(opo->u.data, packet->data, packet->size);
+ opo->n_actions = htons(1);
+ opo->actions[0].type = htons(OFPAT_OUTPUT);
+ opo->actions[0].arg.output.max_len = htons(0);
+ opo->actions[0].arg.output.port = htons(out_port);
+ buffer_put(out, packet->data, packet->size);
+ update_openflow_length(out);
return out;
}
uint16_t in_port, uint16_t out_port)
{
struct ofp_packet_out *opo;
- size_t size = sizeof *opo + sizeof opo->u.actions[0];
+ size_t size = sizeof *opo + sizeof opo->actions[0];
struct buffer *out = buffer_new(size);
opo = buffer_put_uninit(out, size);
memset(opo, 0, size);
opo->header.length = htons(size);
opo->buffer_id = htonl(buffer_id);
opo->in_port = htons(in_port);
- opo->out_port = htons(out_port);
- opo->u.actions[0].type = htons(OFPAT_OUTPUT);
- opo->u.actions[0].arg.output.max_len = htons(0);
- opo->u.actions[0].arg.output.port = htons(out_port);
+ opo->n_actions = htons(1);
+ opo->actions[0].type = htons(OFPAT_OUTPUT);
+ opo->actions[0].arg.output.max_len = htons(0);
+ opo->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;
+}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff