#include "ezio.h"
#include "fatal-signal.h"
#include "netdev.h"
+#include "ofp-util.h"
#include "ofpbuf.h"
#include "openflow/nicira-ext.h"
#include "openflow/openflow.h"
lib/odp-util.h \
lib/ofp-print.c \
lib/ofp-print.h \
+ lib/ofp-util.c \
+ lib/ofp-util.h \
lib/ofpbuf.c \
lib/ofpbuf.h \
lib/ovsdb-data.c \
#include "mac-learning.h"
#include "ofpbuf.h"
#include "ofp-print.h"
+#include "ofp-util.h"
#include "openflow/openflow.h"
#include "poll-loop.h"
#include "queue.h"
--- /dev/null
+/*
+ * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+#include "ofp-print.h"
+#include <inttypes.h>
+#include <stdlib.h>
+#include "ofp-util.h"
+#include "ofpbuf.h"
+#include "packets.h"
+#include "random.h"
+
+#define THIS_MODULE VLM_ofp_util
+#include "vlog.h"
+
+/* Rate limit for OpenFlow message parse errors. These always indicate a bug
+ * in the peer and so there's not much point in showing a lot of them. */
+static struct vlog_rate_limit bad_ofmsg_rl = VLOG_RATE_LIMIT_INIT(1, 5);
+
+/* XXX we should really use consecutive xids to avoid probabilistic
+ * failures. */
+static inline uint32_t
+alloc_xid(void)
+{
+ return random_uint32();
+}
+
+/* Allocates and stores in '*bufferp' a new ofpbuf with a size of
+ * 'openflow_len', starting with an OpenFlow header with the given 'type' and
+ * an arbitrary transaction id. Allocated bytes beyond the header, if any, are
+ * zeroed.
+ *
+ * The caller is responsible for freeing '*bufferp' when it is no longer
+ * needed.
+ *
+ * The OpenFlow header length is initially set to 'openflow_len'; if the
+ * message is later extended, the length should be updated with
+ * update_openflow_length() before sending.
+ *
+ * Returns the header. */
+void *
+make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **bufferp)
+{
+ *bufferp = ofpbuf_new(openflow_len);
+ return put_openflow_xid(openflow_len, type, alloc_xid(), *bufferp);
+}
+
+/* Allocates and stores in '*bufferp' a new ofpbuf with a size of
+ * 'openflow_len', starting with an OpenFlow header with the given 'type' and
+ * transaction id 'xid'. Allocated bytes beyond the header, if any, are
+ * zeroed.
+ *
+ * The caller is responsible for freeing '*bufferp' when it is no longer
+ * needed.
+ *
+ * The OpenFlow header length is initially set to 'openflow_len'; if the
+ * message is later extended, the length should be updated with
+ * update_openflow_length() before sending.
+ *
+ * Returns the header. */
+void *
+make_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
+ struct ofpbuf **bufferp)
+{
+ *bufferp = ofpbuf_new(openflow_len);
+ return put_openflow_xid(openflow_len, type, xid, *bufferp);
+}
+
+/* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
+ * with the given 'type' and an arbitrary transaction id. Allocated bytes
+ * beyond the header, if any, are zeroed.
+ *
+ * The OpenFlow header length is initially set to 'openflow_len'; if the
+ * message is later extended, the length should be updated with
+ * update_openflow_length() before sending.
+ *
+ * Returns the header. */
+void *
+put_openflow(size_t openflow_len, uint8_t type, struct ofpbuf *buffer)
+{
+ return put_openflow_xid(openflow_len, type, alloc_xid(), buffer);
+}
+
+/* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
+ * with the given 'type' and an transaction id 'xid'. Allocated bytes beyond
+ * the header, if any, are zeroed.
+ *
+ * The OpenFlow header length is initially set to 'openflow_len'; if the
+ * message is later extended, the length should be updated with
+ * update_openflow_length() before sending.
+ *
+ * Returns the header. */
+void *
+put_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
+ struct ofpbuf *buffer)
+{
+ struct ofp_header *oh;
+
+ assert(openflow_len >= sizeof *oh);
+ assert(openflow_len <= UINT16_MAX);
+
+ oh = ofpbuf_put_uninit(buffer, openflow_len);
+ oh->version = OFP_VERSION;
+ oh->type = type;
+ oh->length = htons(openflow_len);
+ oh->xid = xid;
+ memset(oh + 1, 0, openflow_len - sizeof *oh);
+ return oh;
+}
+
+/* Updates the 'length' field of the OpenFlow message in 'buffer' to
+ * 'buffer->size'. */
+void
+update_openflow_length(struct ofpbuf *buffer)
+{
+ struct ofp_header *oh = ofpbuf_at_assert(buffer, 0, sizeof *oh);
+ oh->length = htons(buffer->size);
+}
+
+struct ofpbuf *
+make_flow_mod(uint16_t command, const flow_t *flow, size_t actions_len)
+{
+ struct ofp_flow_mod *ofm;
+ size_t size = sizeof *ofm + actions_len;
+ struct ofpbuf *out = ofpbuf_new(size);
+ ofm = ofpbuf_put_zeros(out, sizeof *ofm);
+ ofm->header.version = OFP_VERSION;
+ ofm->header.type = OFPT_FLOW_MOD;
+ ofm->header.length = htons(size);
+ ofm->cookie = 0;
+ ofm->match.wildcards = htonl(0);
+ ofm->match.in_port = htons(flow->in_port == ODPP_LOCAL ? OFPP_LOCAL
+ : 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.dl_vlan = flow->dl_vlan;
+ ofm->match.dl_vlan_pcp = flow->dl_vlan_pcp;
+ ofm->match.dl_type = flow->dl_type;
+ ofm->match.nw_src = flow->nw_src;
+ ofm->match.nw_dst = flow->nw_dst;
+ ofm->match.nw_proto = flow->nw_proto;
+ ofm->match.nw_tos = flow->nw_tos;
+ ofm->match.tp_src = flow->tp_src;
+ ofm->match.tp_dst = flow->tp_dst;
+ ofm->command = htons(command);
+ return out;
+}
+
+struct ofpbuf *
+make_add_flow(const flow_t *flow, uint32_t buffer_id,
+ uint16_t idle_timeout, size_t actions_len)
+{
+ struct ofpbuf *out = make_flow_mod(OFPFC_ADD, flow, actions_len);
+ struct ofp_flow_mod *ofm = out->data;
+ ofm->idle_timeout = htons(idle_timeout);
+ ofm->hard_timeout = htons(OFP_FLOW_PERMANENT);
+ ofm->buffer_id = htonl(buffer_id);
+ return out;
+}
+
+struct ofpbuf *
+make_del_flow(const flow_t *flow)
+{
+ struct ofpbuf *out = make_flow_mod(OFPFC_DELETE_STRICT, flow, 0);
+ struct ofp_flow_mod *ofm = out->data;
+ ofm->out_port = htons(OFPP_NONE);
+ return out;
+}
+
+struct ofpbuf *
+make_add_simple_flow(const flow_t *flow,
+ uint32_t buffer_id, uint16_t out_port,
+ uint16_t idle_timeout)
+{
+ struct ofp_action_output *oao;
+ struct ofpbuf *buffer = make_add_flow(flow, buffer_id, idle_timeout,
+ sizeof *oao);
+ oao = ofpbuf_put_zeros(buffer, sizeof *oao);
+ oao->type = htons(OFPAT_OUTPUT);
+ oao->len = htons(sizeof *oao);
+ oao->port = htons(out_port);
+ return buffer;
+}
+
+struct ofpbuf *
+make_packet_in(uint32_t buffer_id, uint16_t in_port, uint8_t reason,
+ const struct ofpbuf *payload, int max_send_len)
+{
+ struct ofp_packet_in *opi;
+ struct ofpbuf *buf;
+ int send_len;
+
+ send_len = MIN(max_send_len, payload->size);
+ buf = ofpbuf_new(sizeof *opi + send_len);
+ opi = put_openflow_xid(offsetof(struct ofp_packet_in, data),
+ OFPT_PACKET_IN, 0, buf);
+ opi->buffer_id = htonl(buffer_id);
+ opi->total_len = htons(payload->size);
+ opi->in_port = htons(in_port);
+ opi->reason = reason;
+ ofpbuf_put(buf, payload->data, send_len);
+ update_openflow_length(buf);
+
+ return buf;
+}
+
+struct ofpbuf *
+make_packet_out(const struct ofpbuf *packet, uint32_t buffer_id,
+ uint16_t in_port,
+ const struct ofp_action_header *actions, size_t n_actions)
+{
+ size_t actions_len = n_actions * sizeof *actions;
+ struct ofp_packet_out *opo;
+ size_t size = sizeof *opo + actions_len + (packet ? packet->size : 0);
+ struct ofpbuf *out = ofpbuf_new(size);
+
+ opo = ofpbuf_put_uninit(out, sizeof *opo);
+ opo->header.version = OFP_VERSION;
+ opo->header.type = OFPT_PACKET_OUT;
+ opo->header.length = htons(size);
+ opo->header.xid = htonl(0);
+ opo->buffer_id = htonl(buffer_id);
+ opo->in_port = htons(in_port == ODPP_LOCAL ? OFPP_LOCAL : in_port);
+ opo->actions_len = htons(actions_len);
+ ofpbuf_put(out, actions, actions_len);
+ if (packet) {
+ ofpbuf_put(out, packet->data, packet->size);
+ }
+ return out;
+}
+
+struct ofpbuf *
+make_unbuffered_packet_out(const struct ofpbuf *packet,
+ uint16_t in_port, uint16_t out_port)
+{
+ struct ofp_action_output action;
+ action.type = htons(OFPAT_OUTPUT);
+ action.len = htons(sizeof action);
+ action.port = htons(out_port);
+ return make_packet_out(packet, UINT32_MAX, in_port,
+ (struct ofp_action_header *) &action, 1);
+}
+
+struct ofpbuf *
+make_buffered_packet_out(uint32_t buffer_id,
+ uint16_t in_port, uint16_t out_port)
+{
+ struct ofp_action_output action;
+ action.type = htons(OFPAT_OUTPUT);
+ action.len = htons(sizeof action);
+ action.port = htons(out_port);
+ return make_packet_out(NULL, buffer_id, in_port,
+ (struct ofp_action_header *) &action, 1);
+}
+
+/* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */
+struct ofpbuf *
+make_echo_request(void)
+{
+ struct ofp_header *rq;
+ struct ofpbuf *out = ofpbuf_new(sizeof *rq);
+ rq = ofpbuf_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 ofpbuf *
+make_echo_reply(const struct ofp_header *rq)
+{
+ size_t size = ntohs(rq->length);
+ struct ofpbuf *out = ofpbuf_new(size);
+ struct ofp_header *reply = ofpbuf_put(out, rq, size);
+ reply->type = OFPT_ECHO_REPLY;
+ return out;
+}
+
+static int
+check_message_type(uint8_t got_type, uint8_t want_type)
+{
+ if (got_type != want_type) {
+ char *want_type_name = ofp_message_type_to_string(want_type);
+ char *got_type_name = ofp_message_type_to_string(got_type);
+ VLOG_WARN_RL(&bad_ofmsg_rl,
+ "received bad message type %s (expected %s)",
+ got_type_name, want_type_name);
+ free(want_type_name);
+ free(got_type_name);
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
+ }
+ return 0;
+}
+
+/* Checks that 'msg' has type 'type' and that it is exactly 'size' bytes long.
+ * Returns 0 if the checks pass, otherwise an OpenFlow error code (produced
+ * with ofp_mkerr()). */
+int
+check_ofp_message(const struct ofp_header *msg, uint8_t type, size_t size)
+{
+ size_t got_size;
+ int error;
+
+ error = check_message_type(msg->type, type);
+ if (error) {
+ return error;
+ }
+
+ got_size = ntohs(msg->length);
+ if (got_size != size) {
+ char *type_name = ofp_message_type_to_string(type);
+ VLOG_WARN_RL(&bad_ofmsg_rl,
+ "received %s message of length %zu (expected %zu)",
+ type_name, got_size, size);
+ free(type_name);
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ }
+
+ return 0;
+}
+
+/* Checks that 'msg' has type 'type' and that 'msg' is 'size' plus a
+ * nonnegative integer multiple of 'array_elt_size' bytes long. Returns 0 if
+ * the checks pass, otherwise an OpenFlow error code (produced with
+ * ofp_mkerr()).
+ *
+ * If 'n_array_elts' is nonnull, then '*n_array_elts' is set to the number of
+ * 'array_elt_size' blocks in 'msg' past the first 'min_size' bytes, when
+ * successful. */
+int
+check_ofp_message_array(const struct ofp_header *msg, uint8_t type,
+ size_t min_size, size_t array_elt_size,
+ size_t *n_array_elts)
+{
+ size_t got_size;
+ int error;
+
+ assert(array_elt_size);
+
+ error = check_message_type(msg->type, type);
+ if (error) {
+ return error;
+ }
+
+ got_size = ntohs(msg->length);
+ if (got_size < min_size) {
+ char *type_name = ofp_message_type_to_string(type);
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received %s message of length %zu "
+ "(expected at least %zu)",
+ type_name, got_size, min_size);
+ free(type_name);
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ }
+ if ((got_size - min_size) % array_elt_size) {
+ char *type_name = ofp_message_type_to_string(type);
+ VLOG_WARN_RL(&bad_ofmsg_rl,
+ "received %s message of bad length %zu: the "
+ "excess over %zu (%zu) is not evenly divisible by %zu "
+ "(remainder is %zu)",
+ type_name, got_size, min_size, got_size - min_size,
+ array_elt_size, (got_size - min_size) % array_elt_size);
+ free(type_name);
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ }
+ if (n_array_elts) {
+ *n_array_elts = (got_size - min_size) / array_elt_size;
+ }
+ return 0;
+}
+
+int
+check_ofp_packet_out(const struct ofp_header *oh, struct ofpbuf *data,
+ int *n_actionsp, int max_ports)
+{
+ const struct ofp_packet_out *opo;
+ unsigned int actions_len, n_actions;
+ size_t extra;
+ int error;
+
+ *n_actionsp = 0;
+ error = check_ofp_message_array(oh, OFPT_PACKET_OUT,
+ sizeof *opo, 1, &extra);
+ if (error) {
+ return error;
+ }
+ opo = (const struct ofp_packet_out *) oh;
+
+ actions_len = ntohs(opo->actions_len);
+ if (actions_len > extra) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out claims %u bytes of actions "
+ "but message has room for only %zu bytes",
+ actions_len, extra);
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ }
+ if (actions_len % sizeof(union ofp_action)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out claims %u bytes of actions, "
+ "which is not a multiple of %zu",
+ actions_len, sizeof(union ofp_action));
+ return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ }
+
+ n_actions = actions_len / sizeof(union ofp_action);
+ error = validate_actions((const union ofp_action *) opo->actions,
+ n_actions, max_ports);
+ if (error) {
+ return error;
+ }
+
+ data->data = (void *) &opo->actions[n_actions];
+ data->size = extra - actions_len;
+ *n_actionsp = n_actions;
+ return 0;
+}
+
+const struct ofp_flow_stats *
+flow_stats_first(struct flow_stats_iterator *iter,
+ const struct ofp_stats_reply *osr)
+{
+ iter->pos = osr->body;
+ iter->end = osr->body + (ntohs(osr->header.length)
+ - offsetof(struct ofp_stats_reply, body));
+ return flow_stats_next(iter);
+}
+
+const struct ofp_flow_stats *
+flow_stats_next(struct flow_stats_iterator *iter)
+{
+ ptrdiff_t bytes_left = iter->end - iter->pos;
+ const struct ofp_flow_stats *fs;
+ size_t length;
+
+ if (bytes_left < sizeof *fs) {
+ if (bytes_left != 0) {
+ VLOG_WARN_RL(&bad_ofmsg_rl,
+ "%td leftover bytes in flow stats reply", bytes_left);
+ }
+ return NULL;
+ }
+
+ fs = (const void *) iter->pos;
+ length = ntohs(fs->length);
+ if (length < sizeof *fs) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu is shorter than "
+ "min %zu", length, sizeof *fs);
+ return NULL;
+ } else if (length > bytes_left) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu but only %td "
+ "bytes left", length, bytes_left);
+ return NULL;
+ } else if ((length - sizeof *fs) % sizeof fs->actions[0]) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu has %zu bytes "
+ "left over in final action", length,
+ (length - sizeof *fs) % sizeof fs->actions[0]);
+ return NULL;
+ }
+ iter->pos += length;
+ return fs;
+}
+
+/* Alignment of ofp_actions. */
+#define ACTION_ALIGNMENT 8
+
+static int
+check_action_exact_len(const union ofp_action *a, unsigned int len,
+ unsigned int required_len)
+{
+ if (len != required_len) {
+ VLOG_DBG_RL(&bad_ofmsg_rl,
+ "action %u has invalid length %"PRIu16" (must be %u)\n",
+ a->type, ntohs(a->header.len), required_len);
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ }
+ return 0;
+}
+
+static int
+check_action_port(int port, int max_ports)
+{
+ switch (port) {
+ case OFPP_IN_PORT:
+ case OFPP_TABLE:
+ case OFPP_NORMAL:
+ case OFPP_FLOOD:
+ case OFPP_ALL:
+ case OFPP_CONTROLLER:
+ case OFPP_LOCAL:
+ return 0;
+
+ default:
+ if (port >= 0 && port < max_ports) {
+ return 0;
+ }
+ VLOG_WARN_RL(&bad_ofmsg_rl, "unknown output port %x", port);
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
+ }
+}
+
+static int
+check_nicira_action(const union ofp_action *a, unsigned int len)
+{
+ const struct nx_action_header *nah;
+
+ if (len < 16) {
+ VLOG_DBG_RL(&bad_ofmsg_rl,
+ "Nicira vendor action only %u bytes", len);
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ }
+ nah = (const struct nx_action_header *) a;
+
+ switch (ntohs(nah->subtype)) {
+ case NXAST_RESUBMIT:
+ case NXAST_SET_TUNNEL:
+ return check_action_exact_len(a, len, 16);
+ default:
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR_TYPE);
+ }
+}
+
+static int
+check_action(const union ofp_action *a, unsigned int len, int max_ports)
+{
+ int error;
+
+ switch (ntohs(a->type)) {
+ case OFPAT_OUTPUT:
+ error = check_action_port(ntohs(a->output.port), max_ports);
+ return error ? error : check_action_exact_len(a, len, 8);
+
+ case OFPAT_SET_VLAN_VID:
+ case OFPAT_SET_VLAN_PCP:
+ case OFPAT_STRIP_VLAN:
+ case OFPAT_SET_NW_SRC:
+ case OFPAT_SET_NW_DST:
+ case OFPAT_SET_NW_TOS:
+ case OFPAT_SET_TP_SRC:
+ case OFPAT_SET_TP_DST:
+ return check_action_exact_len(a, len, 8);
+
+ case OFPAT_SET_DL_SRC:
+ case OFPAT_SET_DL_DST:
+ return check_action_exact_len(a, len, 16);
+
+ case OFPAT_VENDOR:
+ return (a->vendor.vendor == htonl(NX_VENDOR_ID)
+ ? check_nicira_action(a, len)
+ : ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR));
+
+ default:
+ VLOG_WARN_RL(&bad_ofmsg_rl, "unknown action type %"PRIu16,
+ ntohs(a->type));
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE);
+ }
+}
+
+int
+validate_actions(const union ofp_action *actions, size_t n_actions,
+ int max_ports)
+{
+ const union ofp_action *a;
+
+ for (a = actions; a < &actions[n_actions]; ) {
+ unsigned int len = ntohs(a->header.len);
+ unsigned int n_slots = len / ACTION_ALIGNMENT;
+ unsigned int slots_left = &actions[n_actions] - a;
+ int error;
+
+ if (n_slots > slots_left) {
+ VLOG_DBG_RL(&bad_ofmsg_rl,
+ "action requires %u slots but only %u remain",
+ n_slots, slots_left);
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ } else if (!len) {
+ VLOG_DBG_RL(&bad_ofmsg_rl, "action has invalid length 0");
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ } else if (len % ACTION_ALIGNMENT) {
+ VLOG_DBG_RL(&bad_ofmsg_rl, "action length %u is not a multiple "
+ "of %d", len, ACTION_ALIGNMENT);
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ }
+
+ error = check_action(a, len, max_ports);
+ if (error) {
+ return error;
+ }
+ a += n_slots;
+ }
+ return 0;
+}
+
+/* The set of actions must either come from a trusted source or have been
+ * previously validated with validate_actions(). */
+const union ofp_action *
+actions_first(struct actions_iterator *iter,
+ const union ofp_action *oa, size_t n_actions)
+{
+ iter->pos = oa;
+ iter->end = oa + n_actions;
+ return actions_next(iter);
+}
+
+const union ofp_action *
+actions_next(struct actions_iterator *iter)
+{
+ if (iter->pos < iter->end) {
+ const union ofp_action *a = iter->pos;
+ unsigned int len = ntohs(a->header.len);
+ iter->pos += len / ACTION_ALIGNMENT;
+ return a;
+ } else {
+ return NULL;
+ }
+}
+
+void
+normalize_match(struct ofp_match *m)
+{
+ enum { OFPFW_NW = OFPFW_NW_SRC_MASK | OFPFW_NW_DST_MASK | OFPFW_NW_PROTO };
+ enum { OFPFW_TP = OFPFW_TP_SRC | OFPFW_TP_DST };
+ uint32_t wc;
+
+ wc = ntohl(m->wildcards) & OVSFW_ALL;
+ if (wc & OFPFW_DL_TYPE) {
+ m->dl_type = 0;
+
+ /* Can't sensibly match on network or transport headers if the
+ * data link type is unknown. */
+ wc |= OFPFW_NW | OFPFW_TP;
+ m->nw_src = m->nw_dst = m->nw_proto = 0;
+ m->tp_src = m->tp_dst = 0;
+ } else if (m->dl_type == htons(ETH_TYPE_IP)) {
+ if (wc & OFPFW_NW_PROTO) {
+ m->nw_proto = 0;
+
+ /* Can't sensibly match on transport headers if the network
+ * protocol is unknown. */
+ wc |= OFPFW_TP;
+ m->tp_src = m->tp_dst = 0;
+ } else if (m->nw_proto == IPPROTO_TCP ||
+ m->nw_proto == IPPROTO_UDP ||
+ m->nw_proto == IPPROTO_ICMP) {
+ if (wc & OFPFW_TP_SRC) {
+ m->tp_src = 0;
+ }
+ if (wc & OFPFW_TP_DST) {
+ m->tp_dst = 0;
+ }
+ } else {
+ /* Transport layer fields will always be extracted as zeros, so we
+ * can do an exact-match on those values. */
+ wc &= ~OFPFW_TP;
+ m->tp_src = m->tp_dst = 0;
+ }
+ if (wc & OFPFW_NW_SRC_MASK) {
+ m->nw_src &= flow_nw_bits_to_mask(wc, OFPFW_NW_SRC_SHIFT);
+ }
+ if (wc & OFPFW_NW_DST_MASK) {
+ m->nw_dst &= flow_nw_bits_to_mask(wc, OFPFW_NW_DST_SHIFT);
+ }
+ } else if (m->dl_type == htons(ETH_TYPE_ARP)) {
+ if (wc & OFPFW_NW_PROTO) {
+ m->nw_proto = 0;
+ }
+ if (wc & OFPFW_NW_SRC_MASK) {
+ m->nw_src &= flow_nw_bits_to_mask(wc, OFPFW_NW_SRC_SHIFT);
+ }
+ if (wc & OFPFW_NW_DST_MASK) {
+ m->nw_dst &= flow_nw_bits_to_mask(wc, OFPFW_NW_DST_SHIFT);
+ }
+ m->tp_src = m->tp_dst = 0;
+ } else {
+ /* Network and transport layer fields will always be extracted as
+ * zeros, so we can do an exact-match on those values. */
+ wc &= ~(OFPFW_NW | OFPFW_TP);
+ m->nw_proto = m->nw_src = m->nw_dst = 0;
+ m->tp_src = m->tp_dst = 0;
+ }
+ if (wc & OFPFW_DL_SRC) {
+ memset(m->dl_src, 0, sizeof m->dl_src);
+ }
+ if (wc & OFPFW_DL_DST) {
+ memset(m->dl_dst, 0, sizeof m->dl_dst);
+ }
+ m->wildcards = htonl(wc);
+}
+
--- /dev/null
+/*
+ * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef OFP_UTIL_H
+#define OFP_UTIL_H 1
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+#include "flow.h"
+
+struct ofpbuf;
+struct ofp_action_header;
+
+/* OpenFlow protocol utility functions. */
+void *make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **);
+void *make_openflow_xid(size_t openflow_len, uint8_t type,
+ uint32_t xid, struct ofpbuf **);
+void *put_openflow(size_t openflow_len, uint8_t type, struct ofpbuf *);
+void *put_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
+ struct ofpbuf *);
+void update_openflow_length(struct ofpbuf *);
+struct ofpbuf *make_flow_mod(uint16_t command, const flow_t *,
+ size_t actions_len);
+struct ofpbuf *make_add_flow(const flow_t *, uint32_t buffer_id,
+ uint16_t max_idle, size_t actions_len);
+struct ofpbuf *make_del_flow(const flow_t *);
+struct ofpbuf *make_add_simple_flow(const flow_t *,
+ uint32_t buffer_id, uint16_t out_port,
+ uint16_t max_idle);
+struct ofpbuf *make_packet_in(uint32_t buffer_id, uint16_t in_port,
+ uint8_t reason,
+ const struct ofpbuf *payload, int max_send_len);
+struct ofpbuf *make_packet_out(const struct ofpbuf *packet, uint32_t buffer_id,
+ uint16_t in_port,
+ const struct ofp_action_header *,
+ size_t n_actions);
+struct ofpbuf *make_buffered_packet_out(uint32_t buffer_id,
+ uint16_t in_port, uint16_t out_port);
+struct ofpbuf *make_unbuffered_packet_out(const struct ofpbuf *packet,
+ uint16_t in_port, uint16_t out_port);
+struct ofpbuf *make_echo_request(void);
+struct ofpbuf *make_echo_reply(const struct ofp_header *rq);
+int check_ofp_message(const struct ofp_header *, uint8_t type, size_t size);
+int check_ofp_message_array(const struct ofp_header *, uint8_t type,
+ size_t size, size_t array_elt_size,
+ size_t *n_array_elts);
+int check_ofp_packet_out(const struct ofp_header *, struct ofpbuf *data,
+ int *n_actions, int max_ports);
+
+struct flow_stats_iterator {
+ const uint8_t *pos, *end;
+};
+const struct ofp_flow_stats *flow_stats_first(struct flow_stats_iterator *,
+ const struct ofp_stats_reply *);
+const struct ofp_flow_stats *flow_stats_next(struct flow_stats_iterator *);
+
+struct actions_iterator {
+ const union ofp_action *pos, *end;
+};
+const union ofp_action *actions_first(struct actions_iterator *,
+ const union ofp_action *,
+ size_t n_actions);
+const union ofp_action *actions_next(struct actions_iterator *);
+int validate_actions(const union ofp_action *, size_t n_actions,
+ int max_ports);
+
+void normalize_match(struct ofp_match *);
+
+static inline int
+ofp_mkerr(uint16_t type, uint16_t code)
+{
+ assert(type > 0 && type <= 0x7fff);
+ return (type << 16) | code;
+}
+
+#endif /* ofp-util.h */
#include <stdlib.h>
#include <string.h>
#include "coverage.h"
+#include "ofp-util.h"
#include "ofpbuf.h"
#include "openflow/openflow.h"
#include "poll-loop.h"
#include "fatal-signal.h"
#include "flow.h"
#include "ofp-print.h"
+#include "ofp-util.h"
#include "ofpbuf.h"
#include "openflow/nicira-ext.h"
#include "openflow/openflow.h"
(pvconn->class->wait)(pvconn);
}
-/* XXX we should really use consecutive xids to avoid probabilistic
- * failures. */
-static inline uint32_t
-alloc_xid(void)
-{
- return random_uint32();
-}
-
-/* Allocates and stores in '*bufferp' a new ofpbuf with a size of
- * 'openflow_len', starting with an OpenFlow header with the given 'type' and
- * an arbitrary transaction id. Allocated bytes beyond the header, if any, are
- * zeroed.
- *
- * The caller is responsible for freeing '*bufferp' when it is no longer
- * needed.
- *
- * The OpenFlow header length is initially set to 'openflow_len'; if the
- * message is later extended, the length should be updated with
- * update_openflow_length() before sending.
- *
- * Returns the header. */
-void *
-make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **bufferp)
-{
- *bufferp = ofpbuf_new(openflow_len);
- return put_openflow_xid(openflow_len, type, alloc_xid(), *bufferp);
-}
-
-/* Allocates and stores in '*bufferp' a new ofpbuf with a size of
- * 'openflow_len', starting with an OpenFlow header with the given 'type' and
- * transaction id 'xid'. Allocated bytes beyond the header, if any, are
- * zeroed.
- *
- * The caller is responsible for freeing '*bufferp' when it is no longer
- * needed.
- *
- * The OpenFlow header length is initially set to 'openflow_len'; if the
- * message is later extended, the length should be updated with
- * update_openflow_length() before sending.
- *
- * Returns the header. */
-void *
-make_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
- struct ofpbuf **bufferp)
-{
- *bufferp = ofpbuf_new(openflow_len);
- return put_openflow_xid(openflow_len, type, xid, *bufferp);
-}
-
-/* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
- * with the given 'type' and an arbitrary transaction id. Allocated bytes
- * beyond the header, if any, are zeroed.
- *
- * The OpenFlow header length is initially set to 'openflow_len'; if the
- * message is later extended, the length should be updated with
- * update_openflow_length() before sending.
- *
- * Returns the header. */
-void *
-put_openflow(size_t openflow_len, uint8_t type, struct ofpbuf *buffer)
-{
- return put_openflow_xid(openflow_len, type, alloc_xid(), buffer);
-}
-
-/* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
- * with the given 'type' and an transaction id 'xid'. Allocated bytes beyond
- * the header, if any, are zeroed.
- *
- * The OpenFlow header length is initially set to 'openflow_len'; if the
- * message is later extended, the length should be updated with
- * update_openflow_length() before sending.
- *
- * Returns the header. */
-void *
-put_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
- struct ofpbuf *buffer)
-{
- struct ofp_header *oh;
-
- assert(openflow_len >= sizeof *oh);
- assert(openflow_len <= UINT16_MAX);
-
- oh = ofpbuf_put_uninit(buffer, openflow_len);
- oh->version = OFP_VERSION;
- oh->type = type;
- oh->length = htons(openflow_len);
- oh->xid = xid;
- memset(oh + 1, 0, openflow_len - sizeof *oh);
- return oh;
-}
-
-/* Updates the 'length' field of the OpenFlow message in 'buffer' to
- * 'buffer->size'. */
-void
-update_openflow_length(struct ofpbuf *buffer)
-{
- struct ofp_header *oh = ofpbuf_at_assert(buffer, 0, sizeof *oh);
- oh->length = htons(buffer->size);
-}
-
-struct ofpbuf *
-make_flow_mod(uint16_t command, const flow_t *flow, size_t actions_len)
-{
- struct ofp_flow_mod *ofm;
- size_t size = sizeof *ofm + actions_len;
- struct ofpbuf *out = ofpbuf_new(size);
- ofm = ofpbuf_put_zeros(out, sizeof *ofm);
- ofm->header.version = OFP_VERSION;
- ofm->header.type = OFPT_FLOW_MOD;
- ofm->header.length = htons(size);
- ofm->cookie = 0;
- ofm->match.wildcards = htonl(0);
- ofm->match.in_port = htons(flow->in_port == ODPP_LOCAL ? OFPP_LOCAL
- : 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.dl_vlan = flow->dl_vlan;
- ofm->match.dl_vlan_pcp = flow->dl_vlan_pcp;
- ofm->match.dl_type = flow->dl_type;
- ofm->match.nw_src = flow->nw_src;
- ofm->match.nw_dst = flow->nw_dst;
- ofm->match.nw_proto = flow->nw_proto;
- ofm->match.nw_tos = flow->nw_tos;
- ofm->match.tp_src = flow->tp_src;
- ofm->match.tp_dst = flow->tp_dst;
- ofm->command = htons(command);
- return out;
-}
-
-struct ofpbuf *
-make_add_flow(const flow_t *flow, uint32_t buffer_id,
- uint16_t idle_timeout, size_t actions_len)
-{
- struct ofpbuf *out = make_flow_mod(OFPFC_ADD, flow, actions_len);
- struct ofp_flow_mod *ofm = out->data;
- ofm->idle_timeout = htons(idle_timeout);
- ofm->hard_timeout = htons(OFP_FLOW_PERMANENT);
- ofm->buffer_id = htonl(buffer_id);
- return out;
-}
-
-struct ofpbuf *
-make_del_flow(const flow_t *flow)
-{
- struct ofpbuf *out = make_flow_mod(OFPFC_DELETE_STRICT, flow, 0);
- struct ofp_flow_mod *ofm = out->data;
- ofm->out_port = htons(OFPP_NONE);
- return out;
-}
-
-struct ofpbuf *
-make_add_simple_flow(const flow_t *flow,
- uint32_t buffer_id, uint16_t out_port,
- uint16_t idle_timeout)
-{
- struct ofp_action_output *oao;
- struct ofpbuf *buffer = make_add_flow(flow, buffer_id, idle_timeout,
- sizeof *oao);
- oao = ofpbuf_put_zeros(buffer, sizeof *oao);
- oao->type = htons(OFPAT_OUTPUT);
- oao->len = htons(sizeof *oao);
- oao->port = htons(out_port);
- return buffer;
-}
-
-struct ofpbuf *
-make_packet_in(uint32_t buffer_id, uint16_t in_port, uint8_t reason,
- const struct ofpbuf *payload, int max_send_len)
-{
- struct ofp_packet_in *opi;
- struct ofpbuf *buf;
- int send_len;
-
- send_len = MIN(max_send_len, payload->size);
- buf = ofpbuf_new(sizeof *opi + send_len);
- opi = put_openflow_xid(offsetof(struct ofp_packet_in, data),
- OFPT_PACKET_IN, 0, buf);
- opi->buffer_id = htonl(buffer_id);
- opi->total_len = htons(payload->size);
- opi->in_port = htons(in_port);
- opi->reason = reason;
- ofpbuf_put(buf, payload->data, send_len);
- update_openflow_length(buf);
-
- return buf;
-}
-
-struct ofpbuf *
-make_packet_out(const struct ofpbuf *packet, uint32_t buffer_id,
- uint16_t in_port,
- const struct ofp_action_header *actions, size_t n_actions)
-{
- size_t actions_len = n_actions * sizeof *actions;
- struct ofp_packet_out *opo;
- size_t size = sizeof *opo + actions_len + (packet ? packet->size : 0);
- struct ofpbuf *out = ofpbuf_new(size);
-
- opo = ofpbuf_put_uninit(out, sizeof *opo);
- opo->header.version = OFP_VERSION;
- opo->header.type = OFPT_PACKET_OUT;
- opo->header.length = htons(size);
- opo->header.xid = htonl(0);
- opo->buffer_id = htonl(buffer_id);
- opo->in_port = htons(in_port == ODPP_LOCAL ? OFPP_LOCAL : in_port);
- opo->actions_len = htons(actions_len);
- ofpbuf_put(out, actions, actions_len);
- if (packet) {
- ofpbuf_put(out, packet->data, packet->size);
- }
- return out;
-}
-
-struct ofpbuf *
-make_unbuffered_packet_out(const struct ofpbuf *packet,
- uint16_t in_port, uint16_t out_port)
-{
- struct ofp_action_output action;
- action.type = htons(OFPAT_OUTPUT);
- action.len = htons(sizeof action);
- action.port = htons(out_port);
- return make_packet_out(packet, UINT32_MAX, in_port,
- (struct ofp_action_header *) &action, 1);
-}
-
-struct ofpbuf *
-make_buffered_packet_out(uint32_t buffer_id,
- uint16_t in_port, uint16_t out_port)
-{
- struct ofp_action_output action;
- action.type = htons(OFPAT_OUTPUT);
- action.len = htons(sizeof action);
- action.port = htons(out_port);
- return make_packet_out(NULL, buffer_id, in_port,
- (struct ofp_action_header *) &action, 1);
-}
-
-/* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */
-struct ofpbuf *
-make_echo_request(void)
-{
- struct ofp_header *rq;
- struct ofpbuf *out = ofpbuf_new(sizeof *rq);
- rq = ofpbuf_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 ofpbuf *
-make_echo_reply(const struct ofp_header *rq)
-{
- size_t size = ntohs(rq->length);
- struct ofpbuf *out = ofpbuf_new(size);
- struct ofp_header *reply = ofpbuf_put(out, rq, size);
- reply->type = OFPT_ECHO_REPLY;
- return out;
-}
-
-static int
-check_message_type(uint8_t got_type, uint8_t want_type)
-{
- if (got_type != want_type) {
- char *want_type_name = ofp_message_type_to_string(want_type);
- char *got_type_name = ofp_message_type_to_string(got_type);
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "received bad message type %s (expected %s)",
- got_type_name, want_type_name);
- free(want_type_name);
- free(got_type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
- }
- return 0;
-}
-
-/* Checks that 'msg' has type 'type' and that it is exactly 'size' bytes long.
- * Returns 0 if the checks pass, otherwise an OpenFlow error code (produced
- * with ofp_mkerr()). */
-int
-check_ofp_message(const struct ofp_header *msg, uint8_t type, size_t size)
-{
- size_t got_size;
- int error;
-
- error = check_message_type(msg->type, type);
- if (error) {
- return error;
- }
-
- got_size = ntohs(msg->length);
- if (got_size != size) {
- char *type_name = ofp_message_type_to_string(type);
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "received %s message of length %zu (expected %zu)",
- type_name, got_size, size);
- free(type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
- }
-
- return 0;
-}
-
-/* Checks that 'msg' has type 'type' and that 'msg' is 'size' plus a
- * nonnegative integer multiple of 'array_elt_size' bytes long. Returns 0 if
- * the checks pass, otherwise an OpenFlow error code (produced with
- * ofp_mkerr()).
- *
- * If 'n_array_elts' is nonnull, then '*n_array_elts' is set to the number of
- * 'array_elt_size' blocks in 'msg' past the first 'min_size' bytes, when
- * successful. */
-int
-check_ofp_message_array(const struct ofp_header *msg, uint8_t type,
- size_t min_size, size_t array_elt_size,
- size_t *n_array_elts)
-{
- size_t got_size;
- int error;
-
- assert(array_elt_size);
-
- error = check_message_type(msg->type, type);
- if (error) {
- return error;
- }
-
- got_size = ntohs(msg->length);
- if (got_size < min_size) {
- char *type_name = ofp_message_type_to_string(type);
- VLOG_WARN_RL(&bad_ofmsg_rl, "received %s message of length %zu "
- "(expected at least %zu)",
- type_name, got_size, min_size);
- free(type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
- }
- if ((got_size - min_size) % array_elt_size) {
- char *type_name = ofp_message_type_to_string(type);
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "received %s message of bad length %zu: the "
- "excess over %zu (%zu) is not evenly divisible by %zu "
- "(remainder is %zu)",
- type_name, got_size, min_size, got_size - min_size,
- array_elt_size, (got_size - min_size) % array_elt_size);
- free(type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
- }
- if (n_array_elts) {
- *n_array_elts = (got_size - min_size) / array_elt_size;
- }
- return 0;
-}
-
-int
-check_ofp_packet_out(const struct ofp_header *oh, struct ofpbuf *data,
- int *n_actionsp, int max_ports)
-{
- const struct ofp_packet_out *opo;
- unsigned int actions_len, n_actions;
- size_t extra;
- int error;
-
- *n_actionsp = 0;
- error = check_ofp_message_array(oh, OFPT_PACKET_OUT,
- sizeof *opo, 1, &extra);
- if (error) {
- return error;
- }
- opo = (const struct ofp_packet_out *) oh;
-
- actions_len = ntohs(opo->actions_len);
- if (actions_len > extra) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out claims %u bytes of actions "
- "but message has room for only %zu bytes",
- actions_len, extra);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
- }
- if (actions_len % sizeof(union ofp_action)) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out claims %u bytes of actions, "
- "which is not a multiple of %zu",
- actions_len, sizeof(union ofp_action));
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
- }
-
- n_actions = actions_len / sizeof(union ofp_action);
- error = validate_actions((const union ofp_action *) opo->actions,
- n_actions, max_ports);
- if (error) {
- return error;
- }
-
- data->data = (void *) &opo->actions[n_actions];
- data->size = extra - actions_len;
- *n_actionsp = n_actions;
- return 0;
-}
-
-const struct ofp_flow_stats *
-flow_stats_first(struct flow_stats_iterator *iter,
- const struct ofp_stats_reply *osr)
-{
- iter->pos = osr->body;
- iter->end = osr->body + (ntohs(osr->header.length)
- - offsetof(struct ofp_stats_reply, body));
- return flow_stats_next(iter);
-}
-
-const struct ofp_flow_stats *
-flow_stats_next(struct flow_stats_iterator *iter)
-{
- ptrdiff_t bytes_left = iter->end - iter->pos;
- const struct ofp_flow_stats *fs;
- size_t length;
-
- if (bytes_left < sizeof *fs) {
- if (bytes_left != 0) {
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "%td leftover bytes in flow stats reply", bytes_left);
- }
- return NULL;
- }
-
- fs = (const void *) iter->pos;
- length = ntohs(fs->length);
- if (length < sizeof *fs) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu is shorter than "
- "min %zu", length, sizeof *fs);
- return NULL;
- } else if (length > bytes_left) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu but only %td "
- "bytes left", length, bytes_left);
- return NULL;
- } else if ((length - sizeof *fs) % sizeof fs->actions[0]) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu has %zu bytes "
- "left over in final action", length,
- (length - sizeof *fs) % sizeof fs->actions[0]);
- return NULL;
- }
- iter->pos += length;
- return fs;
-}
-
-/* Alignment of ofp_actions. */
-#define ACTION_ALIGNMENT 8
-
-static int
-check_action_exact_len(const union ofp_action *a, unsigned int len,
- unsigned int required_len)
-{
- if (len != required_len) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "action %u has invalid length %"PRIu16" (must be %u)\n",
- a->type, ntohs(a->header.len), required_len);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- }
- return 0;
-}
-
-static int
-check_action_port(int port, int max_ports)
-{
- switch (port) {
- case OFPP_IN_PORT:
- case OFPP_TABLE:
- case OFPP_NORMAL:
- case OFPP_FLOOD:
- case OFPP_ALL:
- case OFPP_CONTROLLER:
- case OFPP_LOCAL:
- return 0;
-
- default:
- if (port >= 0 && port < max_ports) {
- return 0;
- }
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown output port %x", port);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
- }
-}
-
-static int
-check_nicira_action(const union ofp_action *a, unsigned int len)
-{
- const struct nx_action_header *nah;
-
- if (len < 16) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "Nicira vendor action only %u bytes", len);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- }
- nah = (const struct nx_action_header *) a;
-
- switch (ntohs(nah->subtype)) {
- case NXAST_RESUBMIT:
- case NXAST_SET_TUNNEL:
- return check_action_exact_len(a, len, 16);
- default:
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR_TYPE);
- }
-}
-
-static int
-check_action(const union ofp_action *a, unsigned int len, int max_ports)
-{
- int error;
-
- switch (ntohs(a->type)) {
- case OFPAT_OUTPUT:
- error = check_action_port(ntohs(a->output.port), max_ports);
- return error ? error : check_action_exact_len(a, len, 8);
-
- case OFPAT_SET_VLAN_VID:
- case OFPAT_SET_VLAN_PCP:
- case OFPAT_STRIP_VLAN:
- case OFPAT_SET_NW_SRC:
- case OFPAT_SET_NW_DST:
- case OFPAT_SET_NW_TOS:
- case OFPAT_SET_TP_SRC:
- case OFPAT_SET_TP_DST:
- return check_action_exact_len(a, len, 8);
-
- case OFPAT_SET_DL_SRC:
- case OFPAT_SET_DL_DST:
- return check_action_exact_len(a, len, 16);
-
- case OFPAT_VENDOR:
- return (a->vendor.vendor == htonl(NX_VENDOR_ID)
- ? check_nicira_action(a, len)
- : ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR));
-
- default:
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown action type %"PRIu16,
- ntohs(a->type));
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE);
- }
-}
-
-int
-validate_actions(const union ofp_action *actions, size_t n_actions,
- int max_ports)
-{
- const union ofp_action *a;
-
- for (a = actions; a < &actions[n_actions]; ) {
- unsigned int len = ntohs(a->header.len);
- unsigned int n_slots = len / ACTION_ALIGNMENT;
- unsigned int slots_left = &actions[n_actions] - a;
- int error;
-
- if (n_slots > slots_left) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "action requires %u slots but only %u remain",
- n_slots, slots_left);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- } else if (!len) {
- VLOG_DBG_RL(&bad_ofmsg_rl, "action has invalid length 0");
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- } else if (len % ACTION_ALIGNMENT) {
- VLOG_DBG_RL(&bad_ofmsg_rl, "action length %u is not a multiple "
- "of %d", len, ACTION_ALIGNMENT);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- }
-
- error = check_action(a, len, max_ports);
- if (error) {
- return error;
- }
- a += n_slots;
- }
- return 0;
-}
-
-/* The set of actions must either come from a trusted source or have been
- * previously validated with validate_actions(). */
-const union ofp_action *
-actions_first(struct actions_iterator *iter,
- const union ofp_action *oa, size_t n_actions)
-{
- iter->pos = oa;
- iter->end = oa + n_actions;
- return actions_next(iter);
-}
-
-const union ofp_action *
-actions_next(struct actions_iterator *iter)
-{
- if (iter->pos < iter->end) {
- const union ofp_action *a = iter->pos;
- unsigned int len = ntohs(a->header.len);
- iter->pos += len / ACTION_ALIGNMENT;
- return a;
- } else {
- return NULL;
- }
-}
-
-void
-normalize_match(struct ofp_match *m)
-{
- enum { OFPFW_NW = OFPFW_NW_SRC_MASK | OFPFW_NW_DST_MASK | OFPFW_NW_PROTO };
- enum { OFPFW_TP = OFPFW_TP_SRC | OFPFW_TP_DST };
- uint32_t wc;
-
- wc = ntohl(m->wildcards) & OVSFW_ALL;
- if (wc & OFPFW_DL_TYPE) {
- m->dl_type = 0;
-
- /* Can't sensibly match on network or transport headers if the
- * data link type is unknown. */
- wc |= OFPFW_NW | OFPFW_TP;
- m->nw_src = m->nw_dst = m->nw_proto = 0;
- m->tp_src = m->tp_dst = 0;
- } else if (m->dl_type == htons(ETH_TYPE_IP)) {
- if (wc & OFPFW_NW_PROTO) {
- m->nw_proto = 0;
-
- /* Can't sensibly match on transport headers if the network
- * protocol is unknown. */
- wc |= OFPFW_TP;
- m->tp_src = m->tp_dst = 0;
- } else if (m->nw_proto == IPPROTO_TCP ||
- m->nw_proto == IPPROTO_UDP ||
- m->nw_proto == IPPROTO_ICMP) {
- if (wc & OFPFW_TP_SRC) {
- m->tp_src = 0;
- }
- if (wc & OFPFW_TP_DST) {
- m->tp_dst = 0;
- }
- } else {
- /* Transport layer fields will always be extracted as zeros, so we
- * can do an exact-match on those values. */
- wc &= ~OFPFW_TP;
- m->tp_src = m->tp_dst = 0;
- }
- if (wc & OFPFW_NW_SRC_MASK) {
- m->nw_src &= flow_nw_bits_to_mask(wc, OFPFW_NW_SRC_SHIFT);
- }
- if (wc & OFPFW_NW_DST_MASK) {
- m->nw_dst &= flow_nw_bits_to_mask(wc, OFPFW_NW_DST_SHIFT);
- }
- } else if (m->dl_type == htons(ETH_TYPE_ARP)) {
- if (wc & OFPFW_NW_PROTO) {
- m->nw_proto = 0;
- }
- if (wc & OFPFW_NW_SRC_MASK) {
- m->nw_src &= flow_nw_bits_to_mask(wc, OFPFW_NW_SRC_SHIFT);
- }
- if (wc & OFPFW_NW_DST_MASK) {
- m->nw_dst &= flow_nw_bits_to_mask(wc, OFPFW_NW_DST_SHIFT);
- }
- m->tp_src = m->tp_dst = 0;
- } else {
- /* Network and transport layer fields will always be extracted as
- * zeros, so we can do an exact-match on those values. */
- wc &= ~(OFPFW_NW | OFPFW_TP);
- m->nw_proto = m->nw_src = m->nw_dst = 0;
- m->tp_src = m->tp_dst = 0;
- }
- if (wc & OFPFW_DL_SRC) {
- memset(m->dl_src, 0, sizeof m->dl_src);
- }
- if (wc & OFPFW_DL_DST) {
- memset(m->dl_dst, 0, sizeof m->dl_dst);
- }
- m->wildcards = htonl(wc);
-}
-
/* Initializes 'vconn' as a new vconn named 'name', implemented via 'class'.
* The initial connection status, supplied as 'connect_status', is interpreted
* as follows:
int pvconn_accept(struct pvconn *, int min_version, struct vconn **);
void pvconn_wait(struct pvconn *);
-/* OpenFlow protocol utility functions. */
-void *make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **);
-void *make_openflow_xid(size_t openflow_len, uint8_t type,
- uint32_t xid, struct ofpbuf **);
-void *put_openflow(size_t openflow_len, uint8_t type, struct ofpbuf *);
-void *put_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
- struct ofpbuf *);
-void update_openflow_length(struct ofpbuf *);
-struct ofpbuf *make_flow_mod(uint16_t command, const flow_t *,
- size_t actions_len);
-struct ofpbuf *make_add_flow(const flow_t *, uint32_t buffer_id,
- uint16_t max_idle, size_t actions_len);
-struct ofpbuf *make_del_flow(const flow_t *);
-struct ofpbuf *make_add_simple_flow(const flow_t *,
- uint32_t buffer_id, uint16_t out_port,
- uint16_t max_idle);
-struct ofpbuf *make_packet_in(uint32_t buffer_id, uint16_t in_port,
- uint8_t reason,
- const struct ofpbuf *payload, int max_send_len);
-struct ofpbuf *make_packet_out(const struct ofpbuf *packet, uint32_t buffer_id,
- uint16_t in_port,
- const struct ofp_action_header *,
- size_t n_actions);
-struct ofpbuf *make_buffered_packet_out(uint32_t buffer_id,
- uint16_t in_port, uint16_t out_port);
-struct ofpbuf *make_unbuffered_packet_out(const struct ofpbuf *packet,
- uint16_t in_port, uint16_t out_port);
-struct ofpbuf *make_echo_request(void);
-struct ofpbuf *make_echo_reply(const struct ofp_header *rq);
-int check_ofp_message(const struct ofp_header *, uint8_t type, size_t size);
-int check_ofp_message_array(const struct ofp_header *, uint8_t type,
- size_t size, size_t array_elt_size,
- size_t *n_array_elts);
-int check_ofp_packet_out(const struct ofp_header *, struct ofpbuf *data,
- int *n_actions, int max_ports);
-
-struct flow_stats_iterator {
- const uint8_t *pos, *end;
-};
-const struct ofp_flow_stats *flow_stats_first(struct flow_stats_iterator *,
- const struct ofp_stats_reply *);
-const struct ofp_flow_stats *flow_stats_next(struct flow_stats_iterator *);
-
-struct actions_iterator {
- const union ofp_action *pos, *end;
-};
-const union ofp_action *actions_first(struct actions_iterator *,
- const union ofp_action *,
- size_t n_actions);
-const union ofp_action *actions_next(struct actions_iterator *);
-int validate_actions(const union ofp_action *, size_t n_actions,
- int max_ports);
-
-void normalize_match(struct ofp_match *);
-
-static inline int
-ofp_mkerr(uint16_t type, uint16_t code)
-{
- assert(type > 0 && type <= 0x7fff);
- return (type << 16) | code;
-}
-
#endif /* vconn.h */
VLOG_MODULE(netflow)
VLOG_MODULE(netlink)
VLOG_MODULE(ofctl)
+VLOG_MODULE(ofp_util)
VLOG_MODULE(ovs_discover)
VLOG_MODULE(ofproto)
VLOG_MODULE(openflowd)
#include "flow.h"
#include "mac-learning.h"
#include "odp-util.h"
+#include "ofp-util.h"
#include "ofpbuf.h"
#include "ofproto.h"
#include "pktbuf.h"
#include "netflow.h"
#include "odp-util.h"
#include "ofp-print.h"
+#include "ofp-util.h"
#include "ofproto-sflow.h"
#include "ofpbuf.h"
#include "openflow/nicira-ext.h"
#include <inttypes.h>
#include <stdlib.h>
#include "coverage.h"
+#include "ofp-util.h"
#include "ofpbuf.h"
#include "timeval.h"
#include "util.h"
#include <unistd.h>
#include "dynamic-string.h"
#include "list.h"
+#include "ofp-util.h"
#include "ofpbuf.h"
#include "ofproto.h"
#include "openflow/nicira-ext.h"
#include "netlink.h"
#include "odp-util.h"
#include "ofp-print.h"
+#include "ofp-util.h"
#include "ofpbuf.h"
#include "openflow/nicira-ext.h"
#include "openflow/openflow.h"
projects / openvswitch / commitdiff