+#include "unaligned.h"
+#include "type-props.h"
+#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(ofp_util);
+
+/* 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);
+
+/* Given the wildcard bit count in the least-significant 6 of 'wcbits', returns
+ * an IP netmask with a 1 in each bit that must match and a 0 in each bit that
+ * is wildcarded.
+ *
+ * The bits in 'wcbits' are in the format used in enum ofp_flow_wildcards: 0
+ * is exact match, 1 ignores the LSB, 2 ignores the 2 least-significant bits,
+ * ..., 32 and higher wildcard the entire field. This is the *opposite* of the
+ * usual convention where e.g. /24 indicates that 8 bits (not 24 bits) are
+ * wildcarded. */
+ovs_be32
+ofputil_wcbits_to_netmask(int wcbits)
+{
+ wcbits &= 0x3f;
+ return wcbits < 32 ? htonl(~((1u << wcbits) - 1)) : 0;
+}
+
+/* Given the IP netmask 'netmask', returns the number of bits of the IP address
+ * that it wildcards, that is, the number of 0-bits in 'netmask'. 'netmask'
+ * must be a CIDR netmask (see ip_is_cidr()). */
+int
+ofputil_netmask_to_wcbits(ovs_be32 netmask)
+{
+ return 32 - ip_count_cidr_bits(netmask);
+}
+
+/* A list of the FWW_* and OFPFW_ bits that have the same value, meaning, and
+ * name. */
+#define WC_INVARIANT_LIST \
+ WC_INVARIANT_BIT(IN_PORT) \
+ WC_INVARIANT_BIT(DL_SRC) \
+ WC_INVARIANT_BIT(DL_DST) \
+ WC_INVARIANT_BIT(DL_TYPE) \
+ WC_INVARIANT_BIT(NW_PROTO)
+
+/* Verify that all of the invariant bits (as defined on WC_INVARIANT_LIST)
+ * actually have the same names and values. */
+#define WC_INVARIANT_BIT(NAME) BUILD_ASSERT_DECL(FWW_##NAME == OFPFW_##NAME);
+ WC_INVARIANT_LIST
+#undef WC_INVARIANT_BIT
+
+/* WC_INVARIANTS is the invariant bits (as defined on WC_INVARIANT_LIST) all
+ * OR'd together. */
+static const flow_wildcards_t WC_INVARIANTS = 0
+#define WC_INVARIANT_BIT(NAME) | FWW_##NAME
+ WC_INVARIANT_LIST
+#undef WC_INVARIANT_BIT
+;
+
+/* Converts the wildcard in 'ofpfw' into a flow_wildcards in 'wc' for use in
+ * struct cls_rule. It is the caller's responsibility to handle the special
+ * case where the flow match's dl_vlan is set to OFP_VLAN_NONE. */
+void
+ofputil_wildcard_from_openflow(uint32_t ofpfw, struct flow_wildcards *wc)
+{
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 8);
+
+ /* Initialize most of rule->wc. */
+ flow_wildcards_init_catchall(wc);
+ wc->wildcards = (OVS_FORCE flow_wildcards_t) ofpfw & WC_INVARIANTS;
+
+ /* Wildcard fields that aren't defined by ofp_match or tun_id. */
+ wc->wildcards |= (FWW_ARP_SHA | FWW_ARP_THA | FWW_NW_ECN | FWW_NW_TTL
+ | FWW_ND_TARGET | FWW_IPV6_LABEL);
+
+ if (ofpfw & OFPFW_NW_TOS) {
+ /* OpenFlow 1.0 defines a TOS wildcard, but it's much later in
+ * the enum than we can use. */
+ wc->wildcards |= FWW_NW_DSCP;
+ }
+
+ wc->nw_src_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_SRC_SHIFT);
+ wc->nw_dst_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_DST_SHIFT);
+
+ if (!(ofpfw & OFPFW_TP_SRC)) {
+ wc->tp_src_mask = htons(UINT16_MAX);
+ }
+ if (!(ofpfw & OFPFW_TP_DST)) {
+ wc->tp_dst_mask = htons(UINT16_MAX);
+ }
+
+ if (ofpfw & OFPFW_DL_DST) {
+ /* OpenFlow 1.0 OFPFW_DL_DST covers the whole Ethernet destination, but
+ * Open vSwitch breaks the Ethernet destination into bits as FWW_DL_DST
+ * and FWW_ETH_MCAST. */
+ wc->wildcards |= FWW_ETH_MCAST;
+ }
+
+ /* VLAN TCI mask. */
+ if (!(ofpfw & OFPFW_DL_VLAN_PCP)) {
+ wc->vlan_tci_mask |= htons(VLAN_PCP_MASK | VLAN_CFI);
+ }
+ if (!(ofpfw & OFPFW_DL_VLAN)) {
+ wc->vlan_tci_mask |= htons(VLAN_VID_MASK | VLAN_CFI);
+ }
+}
+
+/* Converts the ofp_match in 'match' into a cls_rule in 'rule', with the given
+ * 'priority'. */
+void
+ofputil_cls_rule_from_match(const struct ofp_match *match,
+ unsigned int priority, struct cls_rule *rule)
+{
+ uint32_t ofpfw = ntohl(match->wildcards) & OFPFW_ALL;
+
+ /* Initialize rule->priority, rule->wc. */
+ rule->priority = !ofpfw ? UINT16_MAX : priority;
+ ofputil_wildcard_from_openflow(ofpfw, &rule->wc);
+
+ /* Initialize most of rule->flow. */
+ rule->flow.nw_src = match->nw_src;
+ rule->flow.nw_dst = match->nw_dst;
+ rule->flow.in_port = ntohs(match->in_port);
+ rule->flow.dl_type = ofputil_dl_type_from_openflow(match->dl_type);
+ rule->flow.tp_src = match->tp_src;
+ rule->flow.tp_dst = match->tp_dst;
+ memcpy(rule->flow.dl_src, match->dl_src, ETH_ADDR_LEN);
+ memcpy(rule->flow.dl_dst, match->dl_dst, ETH_ADDR_LEN);
+ rule->flow.nw_tos = match->nw_tos & IP_DSCP_MASK;
+ rule->flow.nw_proto = match->nw_proto;
+
+ /* Translate VLANs. */
+ if (!(ofpfw & OFPFW_DL_VLAN) && match->dl_vlan == htons(OFP_VLAN_NONE)) {
+ /* Match only packets without 802.1Q header.
+ *
+ * When OFPFW_DL_VLAN_PCP is wildcarded, this is obviously correct.
+ *
+ * If OFPFW_DL_VLAN_PCP is matched, the flow match is contradictory,
+ * because we can't have a specific PCP without an 802.1Q header.
+ * However, older versions of OVS treated this as matching packets
+ * withut an 802.1Q header, so we do here too. */
+ rule->flow.vlan_tci = htons(0);
+ rule->wc.vlan_tci_mask = htons(0xffff);
+ } else {
+ ovs_be16 vid, pcp, tci;
+
+ vid = match->dl_vlan & htons(VLAN_VID_MASK);
+ pcp = htons((match->dl_vlan_pcp << VLAN_PCP_SHIFT) & VLAN_PCP_MASK);
+ tci = vid | pcp | htons(VLAN_CFI);
+ rule->flow.vlan_tci = tci & rule->wc.vlan_tci_mask;
+ }
+
+ /* Clean up. */
+ cls_rule_zero_wildcarded_fields(rule);
+}
+
+/* Convert 'rule' into the OpenFlow match structure 'match'. */
+void
+ofputil_cls_rule_to_match(const struct cls_rule *rule, struct ofp_match *match)
+{
+ const struct flow_wildcards *wc = &rule->wc;
+ uint32_t ofpfw;
+
+ /* Figure out most OpenFlow wildcards. */
+ ofpfw = (OVS_FORCE uint32_t) (wc->wildcards & WC_INVARIANTS);
+ ofpfw |= ofputil_netmask_to_wcbits(wc->nw_src_mask) << OFPFW_NW_SRC_SHIFT;
+ ofpfw |= ofputil_netmask_to_wcbits(wc->nw_dst_mask) << OFPFW_NW_DST_SHIFT;
+ if (wc->wildcards & FWW_NW_DSCP) {
+ ofpfw |= OFPFW_NW_TOS;
+ }
+ if (!wc->tp_src_mask) {
+ ofpfw |= OFPFW_TP_SRC;
+ }
+ if (!wc->tp_dst_mask) {
+ ofpfw |= OFPFW_TP_DST;
+ }
+
+ /* Translate VLANs. */
+ match->dl_vlan = htons(0);
+ match->dl_vlan_pcp = 0;
+ if (rule->wc.vlan_tci_mask == htons(0)) {
+ ofpfw |= OFPFW_DL_VLAN | OFPFW_DL_VLAN_PCP;
+ } else if (rule->wc.vlan_tci_mask & htons(VLAN_CFI)
+ && !(rule->flow.vlan_tci & htons(VLAN_CFI))) {
+ match->dl_vlan = htons(OFP_VLAN_NONE);
+ } else {
+ if (!(rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK))) {
+ ofpfw |= OFPFW_DL_VLAN;
+ } else {
+ match->dl_vlan = htons(vlan_tci_to_vid(rule->flow.vlan_tci));
+ }
+
+ if (!(rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK))) {
+ ofpfw |= OFPFW_DL_VLAN_PCP;
+ } else {
+ match->dl_vlan_pcp = vlan_tci_to_pcp(rule->flow.vlan_tci);
+ }
+ }
+
+ /* Compose most of the match structure. */
+ match->wildcards = htonl(ofpfw);
+ match->in_port = htons(rule->flow.in_port);
+ memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN);
+ memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN);
+ match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type);
+ match->nw_src = rule->flow.nw_src;
+ match->nw_dst = rule->flow.nw_dst;
+ match->nw_tos = rule->flow.nw_tos & IP_DSCP_MASK;
+ match->nw_proto = rule->flow.nw_proto;
+ match->tp_src = rule->flow.tp_src;
+ match->tp_dst = rule->flow.tp_dst;
+ memset(match->pad1, '\0', sizeof match->pad1);
+ memset(match->pad2, '\0', sizeof match->pad2);
+}
+
+/* Given a 'dl_type' value in the format used in struct flow, returns the
+ * corresponding 'dl_type' value for use in an OpenFlow ofp_match structure. */
+ovs_be16
+ofputil_dl_type_to_openflow(ovs_be16 flow_dl_type)
+{
+ return (flow_dl_type == htons(FLOW_DL_TYPE_NONE)
+ ? htons(OFP_DL_TYPE_NOT_ETH_TYPE)
+ : flow_dl_type);
+}
+
+/* Given a 'dl_type' value in the format used in an OpenFlow ofp_match
+ * structure, returns the corresponding 'dl_type' value for use in struct
+ * flow. */
+ovs_be16
+ofputil_dl_type_from_openflow(ovs_be16 ofp_dl_type)
+{
+ return (ofp_dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE)
+ ? htons(FLOW_DL_TYPE_NONE)
+ : ofp_dl_type);
+}
+
+/* Returns a transaction ID to use for an outgoing OpenFlow message. */
+static ovs_be32
+alloc_xid(void)
+{
+ static uint32_t next_xid = 1;
+ return htonl(next_xid++);
+}
+\f
+/* Basic parsing of OpenFlow messages. */
+
+struct ofputil_msg_type {
+ enum ofputil_msg_code code; /* OFPUTIL_*. */
+ uint8_t ofp_version; /* An OpenFlow version or 0 for "any". */
+ uint32_t value; /* OFPT_*, OFPST_*, NXT_*, or NXST_*. */
+ const char *name; /* e.g. "OFPT_FLOW_REMOVED". */
+ unsigned int min_size; /* Minimum total message size in bytes. */
+ /* 0 if 'min_size' is the exact size that the message must be. Otherwise,
+ * the message may exceed 'min_size' by an even multiple of this value. */
+ unsigned int extra_multiple;
+};
+
+/* Represents a malformed OpenFlow message. */
+static const struct ofputil_msg_type ofputil_invalid_type = {
+ OFPUTIL_MSG_INVALID, 0, 0, "OFPUTIL_MSG_INVALID", 0, 0
+};
+
+struct ofputil_msg_category {
+ const char *name; /* e.g. "OpenFlow message" */
+ const struct ofputil_msg_type *types;
+ size_t n_types;
+ enum ofperr missing_error; /* Error value for missing type. */
+};
+
+static enum ofperr
+ofputil_check_length(const struct ofputil_msg_type *type, unsigned int size)
+{
+ switch (type->extra_multiple) {
+ case 0:
+ if (size != type->min_size) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect "
+ "length %u (expected length %u)",
+ type->name, size, type->min_size);
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+ return 0;
+
+ case 1:
+ if (size < type->min_size) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect "
+ "length %u (expected length at least %u bytes)",
+ type->name, size, type->min_size);
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+ return 0;
+
+ default:
+ if (size < type->min_size
+ || (size - type->min_size) % type->extra_multiple) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect "
+ "length %u (must be exactly %u bytes or longer "
+ "by an integer multiple of %u bytes)",
+ type->name, size,
+ type->min_size, type->extra_multiple);
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+ return 0;
+ }
+}
+
+static enum ofperr
+ofputil_lookup_openflow_message(const struct ofputil_msg_category *cat,
+ uint8_t version, uint32_t value,
+ const struct ofputil_msg_type **typep)
+{
+ const struct ofputil_msg_type *type;
+
+ for (type = cat->types; type < &cat->types[cat->n_types]; type++) {
+ if (type->value == value
+ && (!type->ofp_version || version == type->ofp_version)) {
+ *typep = type;
+ return 0;
+ }
+ }
+
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received %s of unknown type %"PRIu32,
+ cat->name, value);
+ return cat->missing_error;
+}
+
+static enum ofperr
+ofputil_decode_vendor(const struct ofp_header *oh, size_t length,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type nxt_messages[] = {
+ { OFPUTIL_NXT_ROLE_REQUEST, OFP10_VERSION,
+ NXT_ROLE_REQUEST, "NXT_ROLE_REQUEST",
+ sizeof(struct nx_role_request), 0 },
+
+ { OFPUTIL_NXT_ROLE_REPLY, OFP10_VERSION,
+ NXT_ROLE_REPLY, "NXT_ROLE_REPLY",
+ sizeof(struct nx_role_request), 0 },
+
+ { OFPUTIL_NXT_SET_FLOW_FORMAT, OFP10_VERSION,
+ NXT_SET_FLOW_FORMAT, "NXT_SET_FLOW_FORMAT",
+ sizeof(struct nx_set_flow_format), 0 },
+
+ { OFPUTIL_NXT_SET_PACKET_IN_FORMAT, OFP10_VERSION,
+ NXT_SET_PACKET_IN_FORMAT, "NXT_SET_PACKET_IN_FORMAT",
+ sizeof(struct nx_set_packet_in_format), 0 },
+
+ { OFPUTIL_NXT_PACKET_IN, OFP10_VERSION,
+ NXT_PACKET_IN, "NXT_PACKET_IN",
+ sizeof(struct nx_packet_in), 1 },
+
+ { OFPUTIL_NXT_FLOW_MOD, OFP10_VERSION,
+ NXT_FLOW_MOD, "NXT_FLOW_MOD",
+ sizeof(struct nx_flow_mod), 8 },
+
+ { OFPUTIL_NXT_FLOW_REMOVED, OFP10_VERSION,
+ NXT_FLOW_REMOVED, "NXT_FLOW_REMOVED",
+ sizeof(struct nx_flow_removed), 8 },
+
+ { OFPUTIL_NXT_FLOW_MOD_TABLE_ID, OFP10_VERSION,
+ NXT_FLOW_MOD_TABLE_ID, "NXT_FLOW_MOD_TABLE_ID",
+ sizeof(struct nx_flow_mod_table_id), 0 },
+
+ { OFPUTIL_NXT_FLOW_AGE, OFP10_VERSION,
+ NXT_FLOW_AGE, "NXT_FLOW_AGE",
+ sizeof(struct nicira_header), 0 },
+
+ { OFPUTIL_NXT_SET_ASYNC_CONFIG, OFP10_VERSION,
+ NXT_SET_ASYNC_CONFIG, "NXT_SET_ASYNC_CONFIG",
+ sizeof(struct nx_async_config), 0 },
+
+ { OFPUTIL_NXT_SET_CONTROLLER_ID, OFP10_VERSION,
+ NXT_SET_CONTROLLER_ID, "NXT_SET_CONTROLLER_ID",
+ sizeof(struct nx_controller_id), 0 },
+ };
+
+ static const struct ofputil_msg_category nxt_category = {
+ "Nicira extension message",
+ nxt_messages, ARRAY_SIZE(nxt_messages),
+ OFPERR_OFPBRC_BAD_SUBTYPE
+ };
+
+ const struct ofp_vendor_header *ovh;
+ const struct nicira_header *nh;
+
+ if (length < sizeof(struct ofp_vendor_header)) {
+ if (length == ntohs(oh->length)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "truncated vendor message");
+ }
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ ovh = (const struct ofp_vendor_header *) oh;
+ if (ovh->vendor != htonl(NX_VENDOR_ID)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor message for unknown "
+ "vendor %"PRIx32, ntohl(ovh->vendor));
+ return OFPERR_OFPBRC_BAD_VENDOR;
+ }
+
+ if (length < sizeof(struct nicira_header)) {
+ if (length == ntohs(oh->length)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received Nicira vendor message of "
+ "length %u (expected at least %zu)",
+ ntohs(ovh->header.length),
+ sizeof(struct nicira_header));
+ }
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ nh = (const struct nicira_header *) oh;
+ return ofputil_lookup_openflow_message(&nxt_category, oh->version,
+ ntohl(nh->subtype), typep);
+}
+
+static enum ofperr
+check_nxstats_msg(const struct ofp_header *oh, size_t length)
+{
+ const struct ofp_stats_msg *osm = (const struct ofp_stats_msg *) oh;
+ ovs_be32 vendor;
+
+ if (length < sizeof(struct ofp_vendor_stats_msg)) {
+ if (length == ntohs(oh->length)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "truncated vendor stats message");
+ }
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ memcpy(&vendor, osm + 1, sizeof vendor);
+ if (vendor != htonl(NX_VENDOR_ID)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor stats message for "
+ "unknown vendor %"PRIx32, ntohl(vendor));
+ return OFPERR_OFPBRC_BAD_VENDOR;
+ }
+
+ if (length < sizeof(struct nicira_stats_msg)) {
+ if (length == ntohs(osm->header.length)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "truncated Nicira stats message");
+ }
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ return 0;
+}
+
+static enum ofperr
+ofputil_decode_nxst_request(const struct ofp_header *oh, size_t length,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type nxst_requests[] = {
+ { OFPUTIL_NXST_FLOW_REQUEST, OFP10_VERSION,
+ NXST_FLOW, "NXST_FLOW request",
+ sizeof(struct nx_flow_stats_request), 8 },
+
+ { OFPUTIL_NXST_AGGREGATE_REQUEST, OFP10_VERSION,
+ NXST_AGGREGATE, "NXST_AGGREGATE request",
+ sizeof(struct nx_aggregate_stats_request), 8 },
+ };
+
+ static const struct ofputil_msg_category nxst_request_category = {
+ "Nicira extension statistics request",
+ nxst_requests, ARRAY_SIZE(nxst_requests),
+ OFPERR_OFPBRC_BAD_SUBTYPE
+ };
+
+ const struct nicira_stats_msg *nsm;
+ enum ofperr error;
+
+ error = check_nxstats_msg(oh, length);
+ if (error) {
+ return error;
+ }
+
+ nsm = (struct nicira_stats_msg *) oh;
+ return ofputil_lookup_openflow_message(&nxst_request_category, oh->version,
+ ntohl(nsm->subtype), typep);
+}
+
+static enum ofperr
+ofputil_decode_nxst_reply(const struct ofp_header *oh, size_t length,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type nxst_replies[] = {
+ { OFPUTIL_NXST_FLOW_REPLY, OFP10_VERSION,
+ NXST_FLOW, "NXST_FLOW reply",
+ sizeof(struct nicira_stats_msg), 8 },
+
+ { OFPUTIL_NXST_AGGREGATE_REPLY, OFP10_VERSION,
+ NXST_AGGREGATE, "NXST_AGGREGATE reply",
+ sizeof(struct nx_aggregate_stats_reply), 0 },
+ };
+
+ static const struct ofputil_msg_category nxst_reply_category = {
+ "Nicira extension statistics reply",
+ nxst_replies, ARRAY_SIZE(nxst_replies),
+ OFPERR_OFPBRC_BAD_SUBTYPE
+ };
+
+ const struct nicira_stats_msg *nsm;
+ enum ofperr error;
+
+ error = check_nxstats_msg(oh, length);
+ if (error) {
+ return error;
+ }
+
+ nsm = (struct nicira_stats_msg *) oh;
+ return ofputil_lookup_openflow_message(&nxst_reply_category, oh->version,
+ ntohl(nsm->subtype), typep);
+}
+
+static enum ofperr
+check_stats_msg(const struct ofp_header *oh, size_t length)
+{
+ if (length < sizeof(struct ofp_stats_msg)) {
+ if (length == ntohs(oh->length)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "truncated stats message");
+ }
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ return 0;
+}
+
+static enum ofperr
+ofputil_decode_ofpst_request(const struct ofp_header *oh, size_t length,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type ofpst_requests[] = {
+ { OFPUTIL_OFPST_DESC_REQUEST, OFP10_VERSION,
+ OFPST_DESC, "OFPST_DESC request",
+ sizeof(struct ofp_stats_msg), 0 },
+
+ { OFPUTIL_OFPST_FLOW_REQUEST, OFP10_VERSION,
+ OFPST_FLOW, "OFPST_FLOW request",
+ sizeof(struct ofp_flow_stats_request), 0 },
+
+ { OFPUTIL_OFPST_AGGREGATE_REQUEST, OFP10_VERSION,
+ OFPST_AGGREGATE, "OFPST_AGGREGATE request",
+ sizeof(struct ofp_flow_stats_request), 0 },
+
+ { OFPUTIL_OFPST_TABLE_REQUEST, OFP10_VERSION,
+ OFPST_TABLE, "OFPST_TABLE request",
+ sizeof(struct ofp_stats_msg), 0 },
+
+ { OFPUTIL_OFPST_PORT_REQUEST, OFP10_VERSION,
+ OFPST_PORT, "OFPST_PORT request",
+ sizeof(struct ofp_port_stats_request), 0 },
+
+ { OFPUTIL_OFPST_QUEUE_REQUEST, OFP10_VERSION,
+ OFPST_QUEUE, "OFPST_QUEUE request",
+ sizeof(struct ofp_queue_stats_request), 0 },
+
+ { 0, 0,
+ OFPST_VENDOR, "OFPST_VENDOR request",
+ sizeof(struct ofp_vendor_stats_msg), 1 },
+ };
+
+ static const struct ofputil_msg_category ofpst_request_category = {
+ "OpenFlow statistics",
+ ofpst_requests, ARRAY_SIZE(ofpst_requests),
+ OFPERR_OFPBRC_BAD_STAT
+ };
+
+ const struct ofp_stats_msg *request = (const struct ofp_stats_msg *) oh;
+ enum ofperr error;
+
+ error = check_stats_msg(oh, length);
+ if (error) {
+ return error;
+ }
+
+ error = ofputil_lookup_openflow_message(&ofpst_request_category,
+ oh->version, ntohs(request->type),
+ typep);
+ if (!error && request->type == htons(OFPST_VENDOR)) {
+ error = ofputil_decode_nxst_request(oh, length, typep);
+ }
+ return error;
+}
+
+static enum ofperr
+ofputil_decode_ofpst_reply(const struct ofp_header *oh, size_t length,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type ofpst_replies[] = {
+ { OFPUTIL_OFPST_DESC_REPLY, OFP10_VERSION,
+ OFPST_DESC, "OFPST_DESC reply",
+ sizeof(struct ofp_desc_stats), 0 },
+
+ { OFPUTIL_OFPST_FLOW_REPLY, OFP10_VERSION,
+ OFPST_FLOW, "OFPST_FLOW reply",
+ sizeof(struct ofp_stats_msg), 1 },
+
+ { OFPUTIL_OFPST_AGGREGATE_REPLY, OFP10_VERSION,
+ OFPST_AGGREGATE, "OFPST_AGGREGATE reply",
+ sizeof(struct ofp_aggregate_stats_reply), 0 },
+
+ { OFPUTIL_OFPST_TABLE_REPLY, OFP10_VERSION,
+ OFPST_TABLE, "OFPST_TABLE reply",
+ sizeof(struct ofp_stats_msg), sizeof(struct ofp_table_stats) },
+
+ { OFPUTIL_OFPST_PORT_REPLY, OFP10_VERSION,
+ OFPST_PORT, "OFPST_PORT reply",
+ sizeof(struct ofp_stats_msg), sizeof(struct ofp_port_stats) },
+
+ { OFPUTIL_OFPST_QUEUE_REPLY, OFP10_VERSION,
+ OFPST_QUEUE, "OFPST_QUEUE reply",
+ sizeof(struct ofp_stats_msg), sizeof(struct ofp_queue_stats) },
+
+ { 0, 0,
+ OFPST_VENDOR, "OFPST_VENDOR reply",
+ sizeof(struct ofp_vendor_stats_msg), 1 },
+ };
+
+ static const struct ofputil_msg_category ofpst_reply_category = {
+ "OpenFlow statistics",
+ ofpst_replies, ARRAY_SIZE(ofpst_replies),
+ OFPERR_OFPBRC_BAD_STAT
+ };
+
+ const struct ofp_stats_msg *reply = (const struct ofp_stats_msg *) oh;
+ enum ofperr error;
+
+ error = check_stats_msg(oh, length);
+ if (error) {
+ return error;
+ }
+
+ error = ofputil_lookup_openflow_message(&ofpst_reply_category, oh->version,
+ ntohs(reply->type), typep);
+ if (!error && reply->type == htons(OFPST_VENDOR)) {
+ error = ofputil_decode_nxst_reply(oh, length, typep);
+ }
+ return error;
+}
+
+static enum ofperr
+ofputil_decode_msg_type__(const struct ofp_header *oh, size_t length,
+ const struct ofputil_msg_type **typep)
+{
+ static const struct ofputil_msg_type ofpt_messages[] = {
+ { OFPUTIL_OFPT_HELLO, OFP10_VERSION,
+ OFPT_HELLO, "OFPT_HELLO",
+ sizeof(struct ofp_hello), 1 },
+
+ { OFPUTIL_OFPT_ERROR, 0,
+ OFPT_ERROR, "OFPT_ERROR",
+ sizeof(struct ofp_error_msg), 1 },
+
+ { OFPUTIL_OFPT_ECHO_REQUEST, OFP10_VERSION,
+ OFPT_ECHO_REQUEST, "OFPT_ECHO_REQUEST",
+ sizeof(struct ofp_header), 1 },
+
+ { OFPUTIL_OFPT_ECHO_REPLY, OFP10_VERSION,
+ OFPT_ECHO_REPLY, "OFPT_ECHO_REPLY",
+ sizeof(struct ofp_header), 1 },
+
+ { OFPUTIL_OFPT_FEATURES_REQUEST, OFP10_VERSION,
+ OFPT_FEATURES_REQUEST, "OFPT_FEATURES_REQUEST",
+ sizeof(struct ofp_header), 0 },
+
+ { OFPUTIL_OFPT_FEATURES_REPLY, OFP10_VERSION,
+ OFPT_FEATURES_REPLY, "OFPT_FEATURES_REPLY",
+ sizeof(struct ofp_switch_features), sizeof(struct ofp_phy_port) },
+
+ { OFPUTIL_OFPT_GET_CONFIG_REQUEST, OFP10_VERSION,
+ OFPT_GET_CONFIG_REQUEST, "OFPT_GET_CONFIG_REQUEST",
+ sizeof(struct ofp_header), 0 },
+
+ { OFPUTIL_OFPT_GET_CONFIG_REPLY, OFP10_VERSION,
+ OFPT_GET_CONFIG_REPLY, "OFPT_GET_CONFIG_REPLY",
+ sizeof(struct ofp_switch_config), 0 },
+
+ { OFPUTIL_OFPT_SET_CONFIG, OFP10_VERSION,
+ OFPT_SET_CONFIG, "OFPT_SET_CONFIG",
+ sizeof(struct ofp_switch_config), 0 },
+
+ { OFPUTIL_OFPT_PACKET_IN, OFP10_VERSION,
+ OFPT_PACKET_IN, "OFPT_PACKET_IN",
+ offsetof(struct ofp_packet_in, data), 1 },
+
+ { OFPUTIL_OFPT_FLOW_REMOVED, OFP10_VERSION,
+ OFPT_FLOW_REMOVED, "OFPT_FLOW_REMOVED",
+ sizeof(struct ofp_flow_removed), 0 },
+
+ { OFPUTIL_OFPT_PORT_STATUS, OFP10_VERSION,
+ OFPT_PORT_STATUS, "OFPT_PORT_STATUS",
+ sizeof(struct ofp_port_status), 0 },
+
+ { OFPUTIL_OFPT_PACKET_OUT, OFP10_VERSION,
+ OFPT_PACKET_OUT, "OFPT_PACKET_OUT",
+ sizeof(struct ofp_packet_out), 1 },
+
+ { OFPUTIL_OFPT_FLOW_MOD, OFP10_VERSION,
+ OFPT_FLOW_MOD, "OFPT_FLOW_MOD",
+ sizeof(struct ofp_flow_mod), 1 },
+
+ { OFPUTIL_OFPT_PORT_MOD, OFP10_VERSION,
+ OFPT_PORT_MOD, "OFPT_PORT_MOD",
+ sizeof(struct ofp_port_mod), 0 },
+
+ { 0, OFP10_VERSION,
+ OFPT_STATS_REQUEST, "OFPT_STATS_REQUEST",
+ sizeof(struct ofp_stats_msg), 1 },
+
+ { 0, OFP10_VERSION,
+ OFPT_STATS_REPLY, "OFPT_STATS_REPLY",
+ sizeof(struct ofp_stats_msg), 1 },
+
+ { OFPUTIL_OFPT_BARRIER_REQUEST, OFP10_VERSION,
+ OFPT_BARRIER_REQUEST, "OFPT_BARRIER_REQUEST",
+ sizeof(struct ofp_header), 0 },
+
+ { OFPUTIL_OFPT_BARRIER_REPLY, OFP10_VERSION,
+ OFPT_BARRIER_REPLY, "OFPT_BARRIER_REPLY",
+ sizeof(struct ofp_header), 0 },
+
+ { 0, 0,
+ OFPT_VENDOR, "OFPT_VENDOR",
+ sizeof(struct ofp_vendor_header), 1 },
+ };
+
+ static const struct ofputil_msg_category ofpt_category = {
+ "OpenFlow message",
+ ofpt_messages, ARRAY_SIZE(ofpt_messages),
+ OFPERR_OFPBRC_BAD_TYPE
+ };
+
+ enum ofperr error;
+
+ error = ofputil_lookup_openflow_message(&ofpt_category, oh->version,
+ oh->type, typep);
+ if (!error) {
+ switch (oh->type) {
+ case OFPT_VENDOR:
+ error = ofputil_decode_vendor(oh, length, typep);
+ break;
+
+ case OFPT_STATS_REQUEST:
+ error = ofputil_decode_ofpst_request(oh, length, typep);
+ break;
+
+ case OFPT_STATS_REPLY:
+ error = ofputil_decode_ofpst_reply(oh, length, typep);
+
+ default:
+ break;
+ }
+ }
+ return error;
+}
+
+/* Decodes the message type represented by 'oh'. Returns 0 if successful or an
+ * OpenFlow error code on failure. Either way, stores in '*typep' a type
+ * structure that can be inspected with the ofputil_msg_type_*() functions.
+ *
+ * oh->length must indicate the correct length of the message (and must be at
+ * least sizeof(struct ofp_header)).
+ *
+ * Success indicates that 'oh' is at least as long as the minimum-length
+ * message of its type. */
+enum ofperr
+ofputil_decode_msg_type(const struct ofp_header *oh,
+ const struct ofputil_msg_type **typep)
+{
+ size_t length = ntohs(oh->length);
+ enum ofperr error;
+
+ error = ofputil_decode_msg_type__(oh, length, typep);
+ if (!error) {
+ error = ofputil_check_length(*typep, length);
+ }
+ if (error) {
+ *typep = &ofputil_invalid_type;
+ }
+ return error;
+}
+
+/* Decodes the message type represented by 'oh', of which only the first
+ * 'length' bytes are available. Returns 0 if successful or an OpenFlow error
+ * code on failure. Either way, stores in '*typep' a type structure that can
+ * be inspected with the ofputil_msg_type_*() functions. */
+enum ofperr
+ofputil_decode_msg_type_partial(const struct ofp_header *oh, size_t length,
+ const struct ofputil_msg_type **typep)
+{
+ enum ofperr error;
+
+ error = (length >= sizeof *oh
+ ? ofputil_decode_msg_type__(oh, length, typep)
+ : OFPERR_OFPBRC_BAD_LEN);
+ if (error) {
+ *typep = &ofputil_invalid_type;
+ }
+ return error;
+}
+
+/* Returns an OFPUTIL_* message type code for 'type'. */
+enum ofputil_msg_code
+ofputil_msg_type_code(const struct ofputil_msg_type *type)
+{
+ return type->code;
+}
+\f
+/* Flow formats. */
+
+bool
+ofputil_flow_format_is_valid(enum nx_flow_format flow_format)
+{
+ switch (flow_format) {
+ case NXFF_OPENFLOW10:
+ case NXFF_NXM:
+ return true;
+ }
+
+ return false;
+}
+
+const char *
+ofputil_flow_format_to_string(enum nx_flow_format flow_format)
+{
+ switch (flow_format) {
+ case NXFF_OPENFLOW10:
+ return "openflow10";
+ case NXFF_NXM:
+ return "nxm";
+ default:
+ NOT_REACHED();
+ }
+}
+
+int
+ofputil_flow_format_from_string(const char *s)
+{
+ return (!strcmp(s, "openflow10") ? NXFF_OPENFLOW10
+ : !strcmp(s, "nxm") ? NXFF_NXM
+ : -1);
+}
+
+bool
+ofputil_packet_in_format_is_valid(enum nx_packet_in_format packet_in_format)
+{
+ switch (packet_in_format) {
+ case NXPIF_OPENFLOW10:
+ case NXPIF_NXM:
+ return true;
+ }
+
+ return false;
+}
+
+const char *
+ofputil_packet_in_format_to_string(enum nx_packet_in_format packet_in_format)
+{
+ switch (packet_in_format) {
+ case NXPIF_OPENFLOW10:
+ return "openflow10";
+ case NXPIF_NXM:
+ return "nxm";
+ default:
+ NOT_REACHED();
+ }
+}
+
+int
+ofputil_packet_in_format_from_string(const char *s)
+{
+ return (!strcmp(s, "openflow10") ? NXPIF_OPENFLOW10
+ : !strcmp(s, "nxm") ? NXPIF_NXM
+ : -1);
+}
+
+static bool
+regs_fully_wildcarded(const struct flow_wildcards *wc)
+{
+ int i;
+
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ if (wc->reg_masks[i] != 0) {
+ return false;
+ }
+ }
+ return true;
+}
+
+/* Returns the minimum nx_flow_format to use for sending 'rule' to a switch
+ * (e.g. to add or remove a flow). Only NXM can handle tunnel IDs, registers,
+ * or fixing the Ethernet multicast bit. Otherwise, it's better to use
+ * NXFF_OPENFLOW10 for backward compatibility. */
+enum nx_flow_format
+ofputil_min_flow_format(const struct cls_rule *rule)
+{
+ const struct flow_wildcards *wc = &rule->wc;
+
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 8);
+
+ /* Only NXM supports separately wildcards the Ethernet multicast bit. */
+ if (!(wc->wildcards & FWW_DL_DST) != !(wc->wildcards & FWW_ETH_MCAST)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching ARP hardware addresses. */
+ if (!(wc->wildcards & FWW_ARP_SHA) || !(wc->wildcards & FWW_ARP_THA)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching IPv6 traffic. */
+ if (!(wc->wildcards & FWW_DL_TYPE)
+ && (rule->flow.dl_type == htons(ETH_TYPE_IPV6))) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching registers. */
+ if (!regs_fully_wildcarded(wc)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching tun_id. */
+ if (wc->tun_id_mask != htonll(0)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching fragments. */
+ if (wc->nw_frag_mask) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching IPv6 flow label. */
+ if (!(wc->wildcards & FWW_IPV6_LABEL)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching IP ECN bits. */
+ if (!(wc->wildcards & FWW_NW_ECN)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports matching IP TTL/hop limit. */
+ if (!(wc->wildcards & FWW_NW_TTL)) {
+ return NXFF_NXM;
+ }
+
+ /* Only NXM supports bitwise matching on transport port. */
+ if ((wc->tp_src_mask && wc->tp_src_mask != htons(UINT16_MAX)) ||
+ (wc->tp_dst_mask && wc->tp_dst_mask != htons(UINT16_MAX))) {
+ return NXFF_NXM;
+ }
+
+ /* Other formats can express this rule. */
+ return NXFF_OPENFLOW10;
+}
+
+/* Returns an OpenFlow message that can be used to set the flow format to
+ * 'flow_format'. */
+struct ofpbuf *
+ofputil_make_set_flow_format(enum nx_flow_format flow_format)
+{
+ struct nx_set_flow_format *sff;
+ struct ofpbuf *msg;
+
+ sff = make_nxmsg(sizeof *sff, NXT_SET_FLOW_FORMAT, &msg);
+ sff->format = htonl(flow_format);
+
+ return msg;
+}
+
+struct ofpbuf *
+ofputil_make_set_packet_in_format(enum nx_packet_in_format packet_in_format)
+{
+ struct nx_set_packet_in_format *spif;
+ struct ofpbuf *msg;
+
+ spif = make_nxmsg(sizeof *spif, NXT_SET_PACKET_IN_FORMAT, &msg);
+ spif->format = htonl(packet_in_format);
+
+ return msg;
+}
+
+/* Returns an OpenFlow message that can be used to turn the flow_mod_table_id
+ * extension on or off (according to 'flow_mod_table_id'). */
+struct ofpbuf *
+ofputil_make_flow_mod_table_id(bool flow_mod_table_id)
+{
+ struct nx_flow_mod_table_id *nfmti;
+ struct ofpbuf *msg;
+
+ nfmti = make_nxmsg(sizeof *nfmti, NXT_FLOW_MOD_TABLE_ID, &msg);
+ nfmti->set = flow_mod_table_id;
+ return msg;
+}
+
+/* Converts an OFPT_FLOW_MOD or NXT_FLOW_MOD message 'oh' into an abstract
+ * flow_mod in 'fm'. Returns 0 if successful, otherwise an OpenFlow error
+ * code.
+ *
+ * 'flow_mod_table_id' should be true if the NXT_FLOW_MOD_TABLE_ID extension is
+ * enabled, false otherwise.
+ *
+ * Does not validate the flow_mod actions. */
+enum ofperr
+ofputil_decode_flow_mod(struct ofputil_flow_mod *fm,
+ const struct ofp_header *oh, bool flow_mod_table_id)
+{
+ const struct ofputil_msg_type *type;
+ uint16_t command;
+ struct ofpbuf b;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+
+ ofputil_decode_msg_type(oh, &type);
+ if (ofputil_msg_type_code(type) == OFPUTIL_OFPT_FLOW_MOD) {
+ /* Standard OpenFlow flow_mod. */
+ const struct ofp_flow_mod *ofm;
+ uint16_t priority;
+ enum ofperr error;
+
+ /* Dissect the message. */
+ ofm = ofpbuf_pull(&b, sizeof *ofm);
+ error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions);
+ if (error) {
+ return error;
+ }
+
+ /* Set priority based on original wildcards. Normally we'd allow
+ * ofputil_cls_rule_from_match() to do this for us, but
+ * ofputil_normalize_rule() can put wildcards where the original flow
+ * didn't have them. */
+ priority = ntohs(ofm->priority);
+ if (!(ofm->match.wildcards & htonl(OFPFW_ALL))) {
+ priority = UINT16_MAX;
+ }
+
+ /* Translate the rule. */
+ ofputil_cls_rule_from_match(&ofm->match, priority, &fm->cr);
+ ofputil_normalize_rule(&fm->cr, NXFF_OPENFLOW10);
+
+ /* Translate the message. */
+ fm->cookie = ofm->cookie;
+ fm->cookie_mask = htonll(UINT64_MAX);
+ command = ntohs(ofm->command);
+ fm->idle_timeout = ntohs(ofm->idle_timeout);
+ fm->hard_timeout = ntohs(ofm->hard_timeout);
+ fm->buffer_id = ntohl(ofm->buffer_id);
+ fm->out_port = ntohs(ofm->out_port);
+ fm->flags = ntohs(ofm->flags);
+ } else if (ofputil_msg_type_code(type) == OFPUTIL_NXT_FLOW_MOD) {
+ /* Nicira extended flow_mod. */
+ const struct nx_flow_mod *nfm;
+ enum ofperr error;
+
+ /* Dissect the message. */
+ nfm = ofpbuf_pull(&b, sizeof *nfm);
+ error = nx_pull_match(&b, ntohs(nfm->match_len), ntohs(nfm->priority),
+ &fm->cr, &fm->cookie, &fm->cookie_mask);
+ if (error) {
+ return error;
+ }
+ error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions);
+ if (error) {
+ return error;
+ }
+
+ /* Translate the message. */
+ command = ntohs(nfm->command);
+ if (command == OFPFC_ADD) {
+ if (fm->cookie_mask) {
+ /* The "NXM_NX_COOKIE*" matches are not valid for flow
+ * additions. Additions must use the "cookie" field of
+ * the "nx_flow_mod" structure. */
+ return OFPERR_NXBRC_NXM_INVALID;
+ } else {
+ fm->cookie = nfm->cookie;
+ fm->cookie_mask = htonll(UINT64_MAX);
+ }
+ }
+ fm->idle_timeout = ntohs(nfm->idle_timeout);
+ fm->hard_timeout = ntohs(nfm->hard_timeout);
+ fm->buffer_id = ntohl(nfm->buffer_id);
+ fm->out_port = ntohs(nfm->out_port);
+ fm->flags = ntohs(nfm->flags);
+ } else {
+ NOT_REACHED();
+ }
+
+ if (flow_mod_table_id) {
+ fm->command = command & 0xff;
+ fm->table_id = command >> 8;
+ } else {
+ fm->command = command;
+ fm->table_id = 0xff;
+ }
+
+ return 0;
+}
+
+/* Converts 'fm' into an OFPT_FLOW_MOD or NXT_FLOW_MOD message according to
+ * 'flow_format' and returns the message.
+ *
+ * 'flow_mod_table_id' should be true if the NXT_FLOW_MOD_TABLE_ID extension is
+ * enabled, false otherwise. */
+struct ofpbuf *
+ofputil_encode_flow_mod(const struct ofputil_flow_mod *fm,
+ enum nx_flow_format flow_format,
+ bool flow_mod_table_id)
+{
+ size_t actions_len = fm->n_actions * sizeof *fm->actions;
+ struct ofpbuf *msg;
+ uint16_t command;
+
+ command = (flow_mod_table_id
+ ? (fm->command & 0xff) | (fm->table_id << 8)
+ : fm->command);
+
+ if (flow_format == NXFF_OPENFLOW10) {
+ struct ofp_flow_mod *ofm;
+
+ msg = ofpbuf_new(sizeof *ofm + actions_len);
+ ofm = put_openflow(sizeof *ofm, OFPT_FLOW_MOD, msg);
+ ofputil_cls_rule_to_match(&fm->cr, &ofm->match);
+ ofm->cookie = fm->cookie;
+ ofm->command = htons(command);
+ ofm->idle_timeout = htons(fm->idle_timeout);
+ ofm->hard_timeout = htons(fm->hard_timeout);
+ ofm->priority = htons(fm->cr.priority);
+ ofm->buffer_id = htonl(fm->buffer_id);
+ ofm->out_port = htons(fm->out_port);
+ ofm->flags = htons(fm->flags);
+ } else if (flow_format == NXFF_NXM) {
+ struct nx_flow_mod *nfm;
+ int match_len;
+
+ msg = ofpbuf_new(sizeof *nfm + NXM_TYPICAL_LEN + actions_len);
+ put_nxmsg(sizeof *nfm, NXT_FLOW_MOD, msg);
+ nfm = msg->data;
+ nfm->command = htons(command);
+ if (command == OFPFC_ADD) {
+ nfm->cookie = fm->cookie;
+ match_len = nx_put_match(msg, &fm->cr, 0, 0);
+ } else {
+ nfm->cookie = 0;
+ match_len = nx_put_match(msg, &fm->cr,
+ fm->cookie, fm->cookie_mask);
+ }
+ nfm->idle_timeout = htons(fm->idle_timeout);
+ nfm->hard_timeout = htons(fm->hard_timeout);
+ nfm->priority = htons(fm->cr.priority);
+ nfm->buffer_id = htonl(fm->buffer_id);
+ nfm->out_port = htons(fm->out_port);
+ nfm->flags = htons(fm->flags);
+ nfm->match_len = htons(match_len);
+ } else {
+ NOT_REACHED();
+ }
+
+ ofpbuf_put(msg, fm->actions, actions_len);
+ update_openflow_length(msg);
+ return msg;
+}
+
+static enum ofperr
+ofputil_decode_ofpst_flow_request(struct ofputil_flow_stats_request *fsr,
+ const struct ofp_header *oh,
+ bool aggregate)
+{
+ const struct ofp_flow_stats_request *ofsr =
+ (const struct ofp_flow_stats_request *) oh;
+
+ fsr->aggregate = aggregate;
+ ofputil_cls_rule_from_match(&ofsr->match, 0, &fsr->match);
+ fsr->out_port = ntohs(ofsr->out_port);
+ fsr->table_id = ofsr->table_id;
+ fsr->cookie = fsr->cookie_mask = htonll(0);
+
+ return 0;
+}