/*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "openflow/openflow.h"
#include "openvswitch/types.h"
-/* The following vendor extensions, proposed by Nicira Networks, are not yet
+/* The following vendor extensions, proposed by Nicira, are not yet
* standardized, so they are not included in openflow.h. Some of them may be
* suitable for standardization; others we never expect to standardize. */
/* Followed by at least the first 64 bytes of the failed request. */
};
\f
-/* Specific Nicira extension error numbers.
- *
- * These are the "code" values used in nx_vendor_error. So far, the "type"
- * values in nx_vendor_error are the same as those in ofp_error_msg. That is,
- * at Nicira so far we've only needed additional vendor-specific 'code' values,
- * so we're using the existing 'type' values to avoid having to invent new ones
- * that duplicate the current ones' meanings. */
-
-/* Additional "code" values for OFPET_BAD_REQUEST. */
-enum nx_bad_request_code {
-/* Nicira Extended Match (NXM) errors. */
-
- /* Generic error code used when there is an error in an NXM sent to the
- * switch. The switch may use one of the more specific error codes below,
- * if there is an appropriate one, to simplify debugging, but it is not
- * required to do so. */
- NXBRC_NXM_INVALID = 0x100,
-
- /* The nxm_type, or nxm_type taken in combination with nxm_hasmask or
- * nxm_length or both, is invalid or not implemented. */
- NXBRC_NXM_BAD_TYPE = 0x101,
-
- /* Invalid nxm_value. */
- NXBRC_NXM_BAD_VALUE = 0x102,
-
- /* Invalid nxm_mask. */
- NXBRC_NXM_BAD_MASK = 0x103,
-
- /* A prerequisite was not met. */
- NXBRC_NXM_BAD_PREREQ = 0x104,
-
- /* A given nxm_type was specified more than once. */
- NXBRC_NXM_DUP_TYPE = 0x105
-};
-
-/* Additional "code" values for OFPET_FLOW_MOD_FAILED. */
-enum nx_flow_mod_failed_code {
- /* Generic hardware error. */
- NXFMFC_HARDWARE = 0x100,
-
- /* A nonexistent table ID was specified in the "command" field of struct
- * ofp_flow_mod, when the nxt_flow_mod_table_id extension is enabled. */
- NXFMFC_BAD_TABLE_ID = 0x101
-};
-\f
/* Nicira vendor requests and replies. */
/* Header for Nicira vendor requests and replies. */
/* Use the upper 8 bits of the 'command' member in struct ofp_flow_mod to
* designate the table to which a flow is to be added? See the big comment
- * on struct nxt_flow_mod_table_id for more information. */
- NXT_FLOW_MOD_TABLE_ID = 15
+ * on struct nx_flow_mod_table_id for more information. */
+ NXT_FLOW_MOD_TABLE_ID = 15,
+
+ /* Alternative PACKET_IN message formats. */
+ NXT_SET_PACKET_IN_FORMAT = 16, /* Set Packet In format. */
+ NXT_PACKET_IN = 17, /* Nicira Packet In. */
+
+ /* Are the idle_age and hard_age members in struct nx_flow_stats supported?
+ * If so, the switch does not reply to this message (which consists only of
+ * a "struct nicira_header"). If not, the switch sends an error reply. */
+ NXT_FLOW_AGE = 18,
+
+ NXT_SET_ASYNC_CONFIG = 19, /* struct nx_async_config. */
+ NXT_SET_CONTROLLER_ID = 20, /* struct nx_controller_id. */
};
/* Header for Nicira vendor stats request and reply messages. */
* matches, then it is modified or deleted; if flows in more than one
* table match, then none is modified or deleted.
*/
-struct nxt_flow_mod_table_id {
+struct nx_flow_mod_table_id {
struct ofp_header header;
- uint32_t vendor; /* NX_VENDOR_ID. */
- uint32_t subtype; /* NXT_FLOW_MOD_TABLE_ID. */
+ ovs_be32 vendor; /* NX_VENDOR_ID. */
+ ovs_be32 subtype; /* NXT_FLOW_MOD_TABLE_ID. */
uint8_t set; /* Nonzero to enable, zero to disable. */
uint8_t pad[7];
};
-OFP_ASSERT(sizeof(struct nxt_flow_mod_table_id) == 24);
+OFP_ASSERT(sizeof(struct nx_flow_mod_table_id) == 24);
+
+enum nx_packet_in_format {
+ NXPIF_OPENFLOW10 = 0, /* Standard OpenFlow 1.0 compatible. */
+ NXPIF_NXM = 1 /* Nicira Extended. */
+};
+
+/* NXT_SET_PACKET_IN_FORMAT request. */
+struct nx_set_packet_in_format {
+ struct nicira_header nxh;
+ ovs_be32 format; /* One of NXPIF_*. */
+};
+OFP_ASSERT(sizeof(struct nx_set_packet_in_format) == 20);
+
+/* NXT_PACKET_IN (analogous to OFPT_PACKET_IN).
+ *
+ * The NXT_PACKET_IN format is intended to model the OpenFlow-1.2 PACKET_IN
+ * with some minor tweaks. Most notably NXT_PACKET_IN includes the cookie of
+ * the rule which triggered the NXT_PACKET_IN message, and the match fields are
+ * in NXM format.
+ *
+ * The match fields in the NXT_PACKET_IN are intended to contain flow
+ * processing metadata collected at the time the NXT_PACKET_IN message was
+ * triggered. It is minimally required to contain the NXM_OF_IN_PORT of the
+ * packet, but may include other NXM headers such as flow registers. The match
+ * fields are allowed to contain non-metadata (e.g. NXM_OF_ETH_SRC etc).
+ * However, this information can typically be found in the packet directly, so
+ * it may be redundant.
+ *
+ * Whereas in most cases a controller can expect to only get back NXM fields
+ * that it set up itself (e.g. flow dumps will ordinarily report only NXM
+ * fields from flows that the controller added), NXT_PACKET_IN messages might
+ * contain fields that the controller does not understand, because the switch
+ * might support fields (new registers, new protocols, etc.) that the
+ * controller does not. The controller must prepared to tolerate these.
+ *
+ * The 'cookie' and 'table_id' fields have no meaning when 'reason' is
+ * OFPR_NO_MATCH. In this case they should be set to 0. */
+struct nx_packet_in {
+ struct nicira_header nxh;
+ ovs_be32 buffer_id; /* ID assigned by datapath. */
+ ovs_be16 total_len; /* Full length of frame. */
+ uint8_t reason; /* Reason packet is sent (one of OFPR_*). */
+ uint8_t table_id; /* ID of the table that was looked up. */
+ ovs_be64 cookie; /* Cookie of the rule that was looked up. */
+ ovs_be16 match_len; /* Size of nx_match. */
+ uint8_t pad[6]; /* Align to 64-bits. */
+ /* Followed by:
+ * - Exactly match_len (possibly 0) bytes containing the nx_match, then
+ * - Exactly (match_len + 7)/8*8 - match_len (between 0 and 7) bytes of
+ * all-zero bytes, then
+ * - Exactly 2 all-zero padding bytes, then
+ * - An Ethernet frame whose length is inferred from nxh.header.length.
+ *
+ * The padding bytes preceding the Ethernet frame ensure that the IP
+ * header (if any) following the Ethernet header is 32-bit aligned. */
+
+ /* uint8_t nxm_fields[...]; */ /* Match. */
+ /* uint8_t pad[2]; */ /* Align to 64 bit + 16 bit. */
+ /* uint8_t data[0]; */ /* Ethernet frame. */
+};
+OFP_ASSERT(sizeof(struct nx_packet_in) == 40);
/* Configures the "role" of the sending controller. The default role is:
*
struct nicira_header nxh;
ovs_be32 role; /* One of NX_ROLE_*. */
};
+OFP_ASSERT(sizeof(struct nx_role_request) == 20);
enum nx_role {
NX_ROLE_OTHER, /* Default role, full access. */
NX_ROLE_MASTER, /* Full access, at most one. */
NX_ROLE_SLAVE /* Read-only access. */
};
+
+/* NXT_SET_ASYNC_CONFIG.
+ *
+ * Sent by a controller, this message configures the asynchronous messages that
+ * the controller wants to receive. Element 0 in each array specifies messages
+ * of interest when the controller has an "other" or "master" role; element 1,
+ * when the controller has a "slave" role.
+ *
+ * Each array element is a bitmask in which a 0-bit disables receiving a
+ * particular message and a 1-bit enables receiving it. Each bit controls the
+ * message whose 'reason' corresponds to the bit index. For example, the bit
+ * with value 1<<2 == 4 in port_status_mask[1] determines whether the
+ * controller will receive OFPT_PORT_STATUS messages with reason OFPPR_MODIFY
+ * (value 2) when the controller has a "slave" role.
+ */
+struct nx_async_config {
+ struct nicira_header nxh;
+ ovs_be32 packet_in_mask[2]; /* Bitmasks of OFPR_* values. */
+ ovs_be32 port_status_mask[2]; /* Bitmasks of OFPRR_* values. */
+ ovs_be32 flow_removed_mask[2]; /* Bitmasks of OFPPR_* values. */
+};
+OFP_ASSERT(sizeof(struct nx_async_config) == 40);
\f
/* Nicira vendor flow actions. */
NXAST_SET_TUNNEL64, /* struct nx_action_set_tunnel64 */
NXAST_MULTIPATH, /* struct nx_action_multipath */
NXAST_AUTOPATH, /* struct nx_action_autopath */
- NXAST_BUNDLE /* struct nx_action_bundle */
+ NXAST_BUNDLE, /* struct nx_action_bundle */
+ NXAST_BUNDLE_LOAD, /* struct nx_action_bundle */
+ NXAST_RESUBMIT_TABLE, /* struct nx_action_resubmit */
+ NXAST_OUTPUT_REG, /* struct nx_action_output_reg */
+ NXAST_LEARN, /* struct nx_action_learn */
+ NXAST_EXIT, /* struct nx_action_header */
+ NXAST_DEC_TTL, /* struct nx_action_header */
+ NXAST_FIN_TIMEOUT, /* struct nx_action_fin_timeout */
+ NXAST_CONTROLLER, /* struct nx_action_controller */
};
/* Header for Nicira-defined actions. */
};
OFP_ASSERT(sizeof(struct nx_action_header) == 16);
-/* Action structure for NXAST_RESUBMIT.
+/* Action structures for NXAST_RESUBMIT and NXAST_RESUBMIT_TABLE.
+ *
+ * These actions search one of the switch's flow tables:
+ *
+ * - For NXAST_RESUBMIT_TABLE only, if the 'table' member is not 255, then
+ * it specifies the table to search.
+ *
+ * - Otherwise (for NXAST_RESUBMIT_TABLE with a 'table' of 255, or for
+ * NXAST_RESUBMIT regardless of 'table'), it searches the current flow
+ * table, that is, the OpenFlow flow table that contains the flow from
+ * which this action was obtained. If this action did not come from a
+ * flow table (e.g. it came from an OFPT_PACKET_OUT message), then table 0
+ * is the current table.
*
- * NXAST_RESUBMIT searches the flow table again, using a flow that is slightly
- * modified from the original lookup:
+ * The flow table lookup uses a flow that may be slightly modified from the
+ * original lookup:
*
- * - The 'in_port' member of struct nx_action_resubmit is used as the flow's
- * in_port.
+ * - For NXAST_RESUBMIT, the 'in_port' member of struct nx_action_resubmit
+ * is used as the flow's in_port.
*
- * - If NXAST_RESUBMIT is preceded by actions that affect the flow
- * (e.g. OFPAT_SET_VLAN_VID), then the flow is updated with the new
- * values.
+ * - For NXAST_RESUBMIT_TABLE, if the 'in_port' member is not OFPP_IN_PORT,
+ * then its value is used as the flow's in_port. Otherwise, the original
+ * in_port is used.
+ *
+ * - If actions that modify the flow (e.g. OFPAT_SET_VLAN_VID) precede the
+ * resubmit action, then the flow is updated with the new values.
*
* Following the lookup, the original in_port is restored.
*
* If the modified flow matched in the flow table, then the corresponding
- * actions are executed. Afterward, actions following NXAST_RESUBMIT in the
+ * actions are executed. Afterward, actions following the resubmit in the
* original set of actions, if any, are executed; any changes made to the
* packet (e.g. changes to VLAN) by secondary actions persist when those
* actions are executed, although the original in_port is restored.
*
- * NXAST_RESUBMIT may be used any number of times within a set of actions.
+ * Resubmit actions may be used any number of times within a set of actions.
+ *
+ * Resubmit actions may nest to an implementation-defined depth. Beyond this
+ * implementation-defined depth, further resubmit actions are simply ignored.
+ *
+ * NXAST_RESUBMIT ignores 'table' and 'pad'. NXAST_RESUBMIT_TABLE requires
+ * 'pad' to be all-bits-zero.
*
- * NXAST_RESUBMIT may nest to an implementation-defined depth. Beyond this
- * implementation-defined depth, further NXAST_RESUBMIT actions are simply
- * ignored. (Open vSwitch 1.0.1 and earlier did not support recursion.)
+ * Open vSwitch 1.0.1 and earlier did not support recursion. Open vSwitch
+ * before 1.2.90 did not support NXAST_RESUBMIT_TABLE.
*/
struct nx_action_resubmit {
ovs_be16 type; /* OFPAT_VENDOR. */
ovs_be32 vendor; /* NX_VENDOR_ID. */
ovs_be16 subtype; /* NXAST_RESUBMIT. */
ovs_be16 in_port; /* New in_port for checking flow table. */
- uint8_t pad[4];
+ uint8_t table; /* NXAST_RESUBMIT_TABLE: table to use. */
+ uint8_t pad[3];
};
OFP_ASSERT(sizeof(struct nx_action_resubmit) == 16);
*
* The following nxm_header values are potentially acceptable as 'dst':
*
+ * - NXM_OF_ETH_DST
+ * - NXM_OF_ETH_SRC
+ * - NXM_OF_IP_TOS
+ * - NXM_OF_IP_SRC
+ * - NXM_OF_IP_DST
+ * - NXM_OF_TCP_SRC
+ * - NXM_OF_TCP_DST
+ * - NXM_OF_UDP_SRC
+ * - NXM_OF_UDP_DST
+ * Modifying any of the above fields changes the corresponding packet
+ * header.
+ *
* - NXM_NX_REG(idx) for idx in the switch's accepted range.
*
* - NXM_OF_VLAN_TCI. Modifying this field's value has side effects on the
*
* 3. Stores 'link' in dst[ofs:ofs+n_bits]. The format and semantics of
* 'dst' and 'ofs_nbits' are similar to those for the NXAST_REG_LOAD
- * action, except that 'dst' must be NXM_NX_REG(idx) for 'idx' in the
- * switch's supported range.
+ * action.
*
* The switch will reject actions that have an unknown 'fields', or an unknown
* 'algorithm', or in which ofs+n_bits is greater than the width of 'dst', or
/* Where to store the result. */
ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */
- ovs_be32 dst; /* Destination register. */
+ ovs_be32 dst; /* Destination. */
};
OFP_ASSERT(sizeof(struct nx_action_multipath) == 32);
NX_MP_ALG_ITER_HASH /* Iterative Hash. */
};
\f
+/* Action structure for NXAST_LEARN.
+ *
+ * This action adds or modifies a flow in an OpenFlow table, similar to
+ * OFPT_FLOW_MOD with OFPFC_MODIFY_STRICT as 'command'. The new flow has the
+ * specified idle timeout, hard timeout, priority, cookie, and flags. The new
+ * flow's match criteria and actions are built by applying each of the series
+ * of flow_mod_spec elements included as part of the action.
+ *
+ * A flow_mod_spec starts with a 16-bit header. A header that is all-bits-0 is
+ * a no-op used for padding the action as a whole to a multiple of 8 bytes in
+ * length. Otherwise, the flow_mod_spec can be thought of as copying 'n_bits'
+ * bits from a source to a destination. In this case, the header contains
+ * multiple fields:
+ *
+ * 15 14 13 12 11 10 0
+ * +------+---+------+---------------------------------+
+ * | 0 |src| dst | n_bits |
+ * +------+---+------+---------------------------------+
+ *
+ * The meaning and format of a flow_mod_spec depends on 'src' and 'dst'. The
+ * following table summarizes the meaning of each possible combination.
+ * Details follow the table:
+ *
+ * src dst meaning
+ * --- --- ----------------------------------------------------------
+ * 0 0 Add match criteria based on value in a field.
+ * 1 0 Add match criteria based on an immediate value.
+ * 0 1 Add NXAST_REG_LOAD action to copy field into a different field.
+ * 1 1 Add NXAST_REG_LOAD action to load immediate value into a field.
+ * 0 2 Add OFPAT_OUTPUT action to output to port from specified field.
+ * All other combinations are undefined and not allowed.
+ *
+ * The flow_mod_spec header is followed by a source specification and a
+ * destination specification. The format and meaning of the source
+ * specification depends on 'src':
+ *
+ * - If 'src' is 0, the source bits are taken from a field in the flow to
+ * which this action is attached. (This should be a wildcarded field. If
+ * its value is fully specified then the source bits being copied have
+ * constant values.)
+ *
+ * The source specification is an ovs_be32 'field' and an ovs_be16 'ofs'.
+ * 'field' is an nxm_header with nxm_hasmask=0, and 'ofs' the starting bit
+ * offset within that field. The source bits are field[ofs:ofs+n_bits-1].
+ * 'field' and 'ofs' are subject to the same restrictions as the source
+ * field in NXAST_REG_MOVE.
+ *
+ * - If 'src' is 1, the source bits are a constant value. The source
+ * specification is (n_bits+15)/16*2 bytes long. Taking those bytes as a
+ * number in network order, the source bits are the 'n_bits'
+ * least-significant bits. The switch will report an error if other bits
+ * in the constant are nonzero.
+ *
+ * The flow_mod_spec destination specification, for 'dst' of 0 or 1, is an
+ * ovs_be32 'field' and an ovs_be16 'ofs'. 'field' is an nxm_header with
+ * nxm_hasmask=0 and 'ofs' is a starting bit offset within that field. The
+ * meaning of the flow_mod_spec depends on 'dst':
+ *
+ * - If 'dst' is 0, the flow_mod_spec specifies match criteria for the new
+ * flow. The new flow matches only if bits field[ofs:ofs+n_bits-1] in a
+ * packet equal the source bits. 'field' may be any nxm_header with
+ * nxm_hasmask=0 that is allowed in NXT_FLOW_MOD.
+ *
+ * Order is significant. Earlier flow_mod_specs must satisfy any
+ * prerequisites for matching fields specified later, by copying constant
+ * values into prerequisite fields.
+ *
+ * The switch will reject flow_mod_specs that do not satisfy NXM masking
+ * restrictions.
+ *
+ * - If 'dst' is 1, the flow_mod_spec specifies an NXAST_REG_LOAD action for
+ * the new flow. The new flow copies the source bits into
+ * field[ofs:ofs+n_bits-1]. Actions are executed in the same order as the
+ * flow_mod_specs.
+ *
+ * A single NXAST_REG_LOAD action writes no more than 64 bits, so n_bits
+ * greater than 64 yields multiple NXAST_REG_LOAD actions.
+ *
+ * The flow_mod_spec destination spec for 'dst' of 2 (when 'src' is 0) is
+ * empty. It has the following meaning:
+ *
+ * - The flow_mod_spec specifies an OFPAT_OUTPUT action for the new flow.
+ * The new flow outputs to the OpenFlow port specified by the source field.
+ * Of the special output ports with value OFPP_MAX or larger, OFPP_IN_PORT,
+ * OFPP_FLOOD, OFPP_LOCAL, and OFPP_ALL are supported. Other special ports
+ * may not be used.
+ *
+ * Resource Management
+ * -------------------
+ *
+ * A switch has a finite amount of flow table space available for learning.
+ * When this space is exhausted, no new learning table entries will be learned
+ * until some existing flow table entries expire. The controller should be
+ * prepared to handle this by flooding (which can be implemented as a
+ * low-priority flow).
+ *
+ * If a learned flow matches a single TCP stream with a relatively long
+ * timeout, one may make the best of resource constraints by setting
+ * 'fin_idle_timeout' or 'fin_hard_timeout' (both measured in seconds), or
+ * both, to shorter timeouts. When either of these is specified as a nonzero
+ * value, OVS adds a NXAST_FIN_TIMEOUT action, with the specified timeouts, to
+ * the learned flow.
+ *
+ * Examples
+ * --------
+ *
+ * The following examples give a prose description of the flow_mod_specs along
+ * with informal notation for how those would be represented and a hex dump of
+ * the bytes that would be required.
+ *
+ * These examples could work with various nx_action_learn parameters. Typical
+ * values would be idle_timeout=OFP_FLOW_PERMANENT, hard_timeout=60,
+ * priority=OFP_DEFAULT_PRIORITY, flags=0, table_id=10.
+ *
+ * 1. Learn input port based on the source MAC, with lookup into
+ * NXM_NX_REG1[16:31] by resubmit to in_port=99:
+ *
+ * Match on in_port=99:
+ * ovs_be16(src=1, dst=0, n_bits=16), 20 10
+ * ovs_be16(99), 00 63
+ * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00
+ *
+ * Match Ethernet destination on Ethernet source from packet:
+ * ovs_be16(src=0, dst=0, n_bits=48), 00 30
+ * ovs_be32(NXM_OF_ETH_SRC), ovs_be16(0) 00 00 04 06 00 00
+ * ovs_be32(NXM_OF_ETH_DST), ovs_be16(0) 00 00 02 06 00 00
+ *
+ * Set NXM_NX_REG1[16:31] to the packet's input port:
+ * ovs_be16(src=0, dst=1, n_bits=16), 08 10
+ * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00
+ * ovs_be32(NXM_NX_REG1), ovs_be16(16) 00 01 02 04 00 10
+ *
+ * Given a packet that arrived on port A with Ethernet source address B,
+ * this would set up the flow "in_port=99, dl_dst=B,
+ * actions=load:A->NXM_NX_REG1[16..31]".
+ *
+ * In syntax accepted by ovs-ofctl, this action is: learn(in_port=99,
+ * NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],
+ * load:NXM_OF_IN_PORT[]->NXM_NX_REG1[16..31])
+ *
+ * 2. Output to input port based on the source MAC and VLAN VID, with lookup
+ * into NXM_NX_REG1[16:31]:
+ *
+ * Match on same VLAN ID as packet:
+ * ovs_be16(src=0, dst=0, n_bits=12), 00 0c
+ * ovs_be32(NXM_OF_VLAN_TCI), ovs_be16(0) 00 00 08 02 00 00
+ * ovs_be32(NXM_OF_VLAN_TCI), ovs_be16(0) 00 00 08 02 00 00
+ *
+ * Match Ethernet destination on Ethernet source from packet:
+ * ovs_be16(src=0, dst=0, n_bits=48), 00 30
+ * ovs_be32(NXM_OF_ETH_SRC), ovs_be16(0) 00 00 04 06 00 00
+ * ovs_be32(NXM_OF_ETH_DST), ovs_be16(0) 00 00 02 06 00 00
+ *
+ * Output to the packet's input port:
+ * ovs_be16(src=0, dst=2, n_bits=16), 10 10
+ * ovs_be32(NXM_OF_IN_PORT), ovs_be16(0) 00 00 00 02 00 00
+ *
+ * Given a packet that arrived on port A with Ethernet source address B in
+ * VLAN C, this would set up the flow "dl_dst=B, vlan_vid=C,
+ * actions=output:A".
+ *
+ * In syntax accepted by ovs-ofctl, this action is:
+ * learn(NXM_OF_VLAN_TCI[0..11], NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],
+ * output:NXM_OF_IN_PORT[])
+ *
+ * 3. Here's a recipe for a very simple-minded MAC learning switch. It uses a
+ * 10-second MAC expiration time to make it easier to see what's going on
+ *
+ * ovs-vsctl del-controller br0
+ * ovs-ofctl del-flows br0
+ * ovs-ofctl add-flow br0 "table=0 actions=learn(table=1, \
+ hard_timeout=10, NXM_OF_VLAN_TCI[0..11], \
+ NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[], \
+ output:NXM_OF_IN_PORT[]), resubmit(,1)"
+ * ovs-ofctl add-flow br0 "table=1 priority=0 actions=flood"
+ *
+ * You can then dump the MAC learning table with:
+ *
+ * ovs-ofctl dump-flows br0 table=1
+ *
+ * Usage Advice
+ * ------------
+ *
+ * For best performance, segregate learned flows into a table that is not used
+ * for any other flows except possibly for a lowest-priority "catch-all" flow
+ * (a flow with no match criteria). If different learning actions specify
+ * different match criteria, use different tables for the learned flows.
+ *
+ * The meaning of 'hard_timeout' and 'idle_timeout' can be counterintuitive.
+ * These timeouts apply to the flow that is added, which means that a flow with
+ * an idle timeout will expire when no traffic has been sent *to* the learned
+ * address. This is not usually the intent in MAC learning; instead, we want
+ * the MAC learn entry to expire when no traffic has been sent *from* the
+ * learned address. Use a hard timeout for that.
+ */
+struct nx_action_learn {
+ ovs_be16 type; /* OFPAT_VENDOR. */
+ ovs_be16 len; /* At least 24. */
+ ovs_be32 vendor; /* NX_VENDOR_ID. */
+ ovs_be16 subtype; /* NXAST_LEARN. */
+ ovs_be16 idle_timeout; /* Idle time before discarding (seconds). */
+ ovs_be16 hard_timeout; /* Max time before discarding (seconds). */
+ ovs_be16 priority; /* Priority level of flow entry. */
+ ovs_be64 cookie; /* Cookie for new flow. */
+ ovs_be16 flags; /* Either 0 or OFPFF_SEND_FLOW_REM. */
+ uint8_t table_id; /* Table to insert flow entry. */
+ uint8_t pad; /* Must be zero. */
+ ovs_be16 fin_idle_timeout; /* Idle timeout after FIN, if nonzero. */
+ ovs_be16 fin_hard_timeout; /* Hard timeout after FIN, if nonzero. */
+ /* Followed by a sequence of flow_mod_spec elements, as described above,
+ * until the end of the action is reached. */
+};
+OFP_ASSERT(sizeof(struct nx_action_learn) == 32);
+
+#define NX_LEARN_N_BITS_MASK 0x3ff
+
+#define NX_LEARN_SRC_FIELD (0 << 13) /* Copy from field. */
+#define NX_LEARN_SRC_IMMEDIATE (1 << 13) /* Copy from immediate value. */
+#define NX_LEARN_SRC_MASK (1 << 13)
+
+#define NX_LEARN_DST_MATCH (0 << 11) /* Add match criterion. */
+#define NX_LEARN_DST_LOAD (1 << 11) /* Add NXAST_REG_LOAD action. */
+#define NX_LEARN_DST_OUTPUT (2 << 11) /* Add OFPAT_OUTPUT action. */
+#define NX_LEARN_DST_RESERVED (3 << 11) /* Not yet defined. */
+#define NX_LEARN_DST_MASK (3 << 11)
+
+/* Action structure for NXAST_FIN_TIMEOUT.
+ *
+ * This action changes the idle timeout or hard timeout, or both, of this
+ * OpenFlow rule when the rule matches a TCP packet with the FIN or RST flag.
+ * When such a packet is observed, the action reduces the rule's idle timeout
+ * to 'fin_idle_timeout' and its hard timeout to 'fin_hard_timeout'. This
+ * action has no effect on an existing timeout that is already shorter than the
+ * one that the action specifies. A 'fin_idle_timeout' or 'fin_hard_timeout'
+ * of zero has no effect on the respective timeout.
+ *
+ * 'fin_idle_timeout' and 'fin_hard_timeout' are measured in seconds.
+ * 'fin_hard_timeout' specifies time since the flow's creation, not since the
+ * receipt of the FIN or RST.
+ *
+ * This is useful for quickly discarding learned TCP flows that otherwise will
+ * take a long time to expire.
+ *
+ * This action is intended for use with an OpenFlow rule that matches only a
+ * single TCP flow. If the rule matches multiple TCP flows (e.g. it wildcards
+ * all TCP traffic, or all TCP traffic to a particular port), then any FIN or
+ * RST in any of those flows will cause the entire OpenFlow rule to expire
+ * early, which is not normally desirable.
+ */
+struct nx_action_fin_timeout {
+ ovs_be16 type; /* OFPAT_VENDOR. */
+ ovs_be16 len; /* 16. */
+ ovs_be32 vendor; /* NX_VENDOR_ID. */
+ ovs_be16 subtype; /* NXAST_FIN_TIMEOUT. */
+ ovs_be16 fin_idle_timeout; /* New idle timeout, if nonzero. */
+ ovs_be16 fin_hard_timeout; /* New hard timeout, if nonzero. */
+ ovs_be16 pad; /* Must be zero. */
+};
+OFP_ASSERT(sizeof(struct nx_action_fin_timeout) == 16);
+\f
/* Action structure for NXAST_AUTOPATH.
*
* This action performs the following steps in sequence:
* 3. Stores 'port' in dst[ofs:ofs+n_bits].
*
* The format and semantics of 'dst' and 'ofs_nbits' are similar to those
- * for the NXAST_REG_LOAD action, except that 'dst' must be
- * NXM_NX_REG(idx) for 'idx' in the switch's supported range.
+ * for the NXAST_REG_LOAD action.
*
* The switch will reject actions in which ofs+n_bits is greater than the width
* of 'dst', with error type OFPET_BAD_ACTION, code OFPBAC_BAD_ARGUMENT.
/* Where to store the result. */
ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */
- ovs_be32 dst; /* Destination register. */
+ ovs_be32 dst; /* Destination. */
ovs_be32 id; /* Autopath ID. */
ovs_be32 pad;
};
OFP_ASSERT(sizeof(struct nx_action_autopath) == 24);
\f
-/* Action structure for NXAST_BUNDLE.
+/* Action structure for NXAST_BUNDLE and NXAST_BUNDLE_LOAD.
*
- * NXAST_BUNDLE chooses a slave from a supplied list of options, and outputs to
- * its selection.
+ * The bundle actions choose a slave from a supplied list of options.
+ * NXAST_BUNDLE outputs to its selection. NXAST_BUNDLE_LOAD writes its
+ * selection to a register.
*
* The list of possible slaves follows the nx_action_bundle structure. The size
* of each slave is governed by its type as indicated by the 'slave_type'
* slave. If the switch does not support the specified 'algorithm' parameter,
* it should reject the action.
*
+ * Several algorithms take into account liveness when selecting slaves. The
+ * liveness of a slave is implementation defined (with one exception), but will
+ * generally take into account things like its carrier status and the results
+ * of any link monitoring protocols which happen to be running on it. In order
+ * to give controllers a place-holder value, the OFPP_NONE port is always
+ * considered live.
+ *
* Some slave selection strategies require the use of a hash function, in which
* case the 'fields' and 'basis' parameters should be populated. The 'fields'
* parameter (one of NX_HASH_FIELDS_*) designates which parts of the flow to
*
* The 'zero' parameter at the end of the action structure is reserved for
* future use. Switches are required to reject actions which have nonzero
- * bytes in the 'zero' field. */
+ * bytes in the 'zero' field.
+ *
+ * NXAST_BUNDLE actions should have 'ofs_nbits' and 'dst' zeroed. Switches
+ * should reject actions which have nonzero bytes in either of these fields.
+ *
+ * NXAST_BUNDLE_LOAD stores the OpenFlow port number of the selected slave in
+ * dst[ofs:ofs+n_bits]. The format and semantics of 'dst' and 'ofs_nbits' are
+ * similar to those for the NXAST_REG_LOAD action. */
struct nx_action_bundle {
ovs_be16 type; /* OFPAT_VENDOR. */
ovs_be16 len; /* Length including slaves. */
ovs_be32 vendor; /* NX_VENDOR_ID. */
- ovs_be16 subtype; /* NXAST_BUNDLE. */
+ ovs_be16 subtype; /* NXAST_BUNDLE or NXAST_BUNDLE_LOAD. */
/* Slave choice algorithm to apply to hash value. */
ovs_be16 algorithm; /* One of NX_BD_ALG_*. */
/* What fields to hash and how. */
- ovs_be16 fields; /* One of NX_BD_FIELDS_*. */
+ ovs_be16 fields; /* One of NX_HASH_FIELDS_*. */
ovs_be16 basis; /* Universal hash parameter. */
ovs_be32 slave_type; /* NXM_OF_IN_PORT. */
ovs_be16 n_slaves; /* Number of slaves. */
- uint8_t zero[10]; /* Reserved. Must be zero. */
+ ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */
+ ovs_be32 dst; /* Destination. */
+
+ uint8_t zero[4]; /* Reserved. Must be zero. */
};
OFP_ASSERT(sizeof(struct nx_action_bundle) == 32);
NX_BD_ALG_HRW /* Highest Random Weight. */
};
\f
+/* Action structure for NXAST_OUTPUT_REG.
+ *
+ * Outputs to the OpenFlow port number written to src[ofs:ofs+nbits].
+ *
+ * The format and semantics of 'src' and 'ofs_nbits' are similar to those for
+ * the NXAST_REG_LOAD action.
+ *
+ * The acceptable nxm_header values for 'src' are the same as the acceptable
+ * nxm_header values for the 'src' field of NXAST_REG_MOVE.
+ *
+ * The 'max_len' field indicates the number of bytes to send when the chosen
+ * port is OFPP_CONTROLLER. Its semantics are equivalent to the 'max_len'
+ * field of OFPAT_OUTPUT.
+ *
+ * The 'zero' field is required to be zeroed for forward compatibility. */
+struct nx_action_output_reg {
+ ovs_be16 type; /* OFPAT_VENDOR. */
+ ovs_be16 len; /* 24. */
+ ovs_be32 vendor; /* NX_VENDOR_ID. */
+ ovs_be16 subtype; /* NXAST_OUTPUT_REG. */
+
+ ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */
+ ovs_be32 src; /* Source. */
+
+ ovs_be16 max_len; /* Max length to send to controller. */
+
+ uint8_t zero[6]; /* Reserved, must be zero. */
+};
+OFP_ASSERT(sizeof(struct nx_action_output_reg) == 24);
+\f
+/* NXAST_EXIT
+ *
+ * Discontinues action processing.
+ *
+ * The NXAST_EXIT action causes the switch to immediately halt processing
+ * actions for the flow. Any actions which have already been processed are
+ * executed by the switch. However, any further actions, including those which
+ * may be in different tables, or different levels of the NXAST_RESUBMIT
+ * hierarchy, will be ignored.
+ *
+ * Uses the nx_action_header structure. */
+\f
/* Flexible flow specifications (aka NXM = Nicira Extended Match).
*
* OpenFlow 1.0 has "struct ofp_match" for specifying flow matches. This
* and nxm_value=0x0800. That is, matching on the IP source address is
* allowed only if the Ethernet type is explicitly set to IP.
*
- * - An nxm_entry for nxm_type=NXM_OF_TCP_SRC is allowed only if it is preced
- * by an entry with nxm_type=NXM_OF_ETH_TYPE, nxm_hasmask=0,
- * nxm_value=0x0800 and another with nxm_type=NXM_OF_IP_PROTO,
- * nxm_hasmask=0, nxm_value=6, in that order. That is, matching on the TCP
- * source port is allowed only if the Ethernet type is IP and the IP
- * protocol is TCP.
+ * - An nxm_entry for nxm_type=NXM_OF_TCP_SRC is allowed only if it is
+ * preceded by an entry with nxm_type=NXM_OF_ETH_TYPE, nxm_hasmask=0, and
+ * nxm_value either 0x0800 or 0x86dd, and another with
+ * nxm_type=NXM_OF_IP_PROTO, nxm_hasmask=0, nxm_value=6, in that order.
+ * That is, matching on the TCP source port is allowed only if the Ethernet
+ * type is IP or IPv6 and the IP protocol is TCP.
*
* These restrictions should be noted in specifications for individual fields.
* A switch may implement relaxed versions of these restrictions. A switch
* numbers and byte indexes.
*
*
- * 8-bit nxm_value, nxm_hasmask=1, nxm_length=1:
+ * 8-bit nxm_value, nxm_hasmask=1, nxm_length=2:
*
* 0 3 4 5
* +------------+---+---+
*
* Format: 16-bit integer in network byte order.
*
- * Masking: Not maskable. */
+ * Masking: Fully maskable, in Open vSwitch 1.6 and later. Not maskable, in
+ * earlier versions. */
#define NXM_OF_TCP_SRC NXM_HEADER (0x0000, 9, 2)
+#define NXM_OF_TCP_SRC_W NXM_HEADER_W(0x0000, 9, 2)
#define NXM_OF_TCP_DST NXM_HEADER (0x0000, 10, 2)
+#define NXM_OF_TCP_DST_W NXM_HEADER_W(0x0000, 10, 2)
/* The source or destination port in the UDP header.
*
*
* Format: 16-bit integer in network byte order.
*
- * Masking: Not maskable. */
+ * Masking: Fully maskable, in Open vSwitch 1.6 and later. Not maskable, in
+ * earlier versions. */
#define NXM_OF_UDP_SRC NXM_HEADER (0x0000, 11, 2)
+#define NXM_OF_UDP_SRC_W NXM_HEADER_W(0x0000, 11, 2)
#define NXM_OF_UDP_DST NXM_HEADER (0x0000, 12, 2)
+#define NXM_OF_UDP_DST_W NXM_HEADER_W(0x0000, 12, 2)
/* The type or code in the ICMP header.
*
#define NXM_NX_REG2_W NXM_HEADER_W(0x0001, 2, 4)
#define NXM_NX_REG3 NXM_HEADER (0x0001, 3, 4)
#define NXM_NX_REG3_W NXM_HEADER_W(0x0001, 3, 4)
+#define NXM_NX_REG4 NXM_HEADER (0x0001, 4, 4)
+#define NXM_NX_REG4_W NXM_HEADER_W(0x0001, 4, 4)
+#define NXM_NX_REG5 NXM_HEADER (0x0001, 5, 4)
+#define NXM_NX_REG5_W NXM_HEADER_W(0x0001, 5, 4)
+#define NXM_NX_REG6 NXM_HEADER (0x0001, 6, 4)
+#define NXM_NX_REG6_W NXM_HEADER_W(0x0001, 6, 4)
+#define NXM_NX_REG7 NXM_HEADER (0x0001, 7, 4)
+#define NXM_NX_REG7_W NXM_HEADER_W(0x0001, 7, 4)
/* Tunnel ID.
*
*
* Format: 128-bit IPv6 address.
*
- * Masking: Not maskable. */
-#define NXM_NX_ND_TARGET NXM_HEADER (0x0001, 23, 16)
+ * Masking: Only CIDR masks are allowed, that is, masks that consist of N
+ * high-order bits set to 1 and the other 128-N bits set to 0. */
+#define NXM_NX_ND_TARGET NXM_HEADER (0x0001, 23, 16)
+#define NXM_NX_ND_TARGET_W NXM_HEADER_W (0x0001, 23, 16)
/* The source link-layer address option in an IPv6 Neighbor Discovery
* message.
* Masking: Not maskable. */
#define NXM_NX_ND_TLL NXM_HEADER (0x0001, 25, 6)
+/* IP fragment information.
+ *
+ * Prereqs:
+ * NXM_OF_ETH_TYPE must be either 0x0800 or 0x86dd.
+ *
+ * Format: 8-bit value with one of the values 0, 1, or 3, as described below.
+ *
+ * Masking: Fully maskable.
+ *
+ * This field has three possible values:
+ *
+ * - A packet that is not an IP fragment has value 0.
+ *
+ * - A packet that is an IP fragment with offset 0 (the first fragment) has
+ * bit 0 set and thus value 1.
+ *
+ * - A packet that is an IP fragment with nonzero offset has bits 0 and 1 set
+ * and thus value 3.
+ *
+ * NX_IP_FRAG_ANY and NX_IP_FRAG_LATER are declared to symbolically represent
+ * the meanings of bits 0 and 1.
+ *
+ * The switch may reject matches against values that can never appear.
+ *
+ * It is important to understand how this field interacts with the OpenFlow IP
+ * fragment handling mode:
+ *
+ * - In OFPC_FRAG_DROP mode, the OpenFlow switch drops all IP fragments
+ * before they reach the flow table, so every packet that is available for
+ * matching will have value 0 in this field.
+ *
+ * - Open vSwitch does not implement OFPC_FRAG_REASM mode, but if it did then
+ * IP fragments would be reassembled before they reached the flow table and
+ * again every packet available for matching would always have value 0.
+ *
+ * - In OFPC_FRAG_NORMAL mode, all three values are possible, but OpenFlow
+ * 1.0 says that fragments' transport ports are always 0, even for the
+ * first fragment, so this does not provide much extra information.
+ *
+ * - In OFPC_FRAG_NX_MATCH mode, all three values are possible. For
+ * fragments with offset 0, Open vSwitch makes L4 header information
+ * available.
+ */
+#define NXM_NX_IP_FRAG NXM_HEADER (0x0001, 26, 1)
+#define NXM_NX_IP_FRAG_W NXM_HEADER_W(0x0001, 26, 1)
+
+/* Bits in the value of NXM_NX_IP_FRAG. */
+#define NX_IP_FRAG_ANY (1 << 0) /* Is this a fragment? */
+#define NX_IP_FRAG_LATER (1 << 1) /* Is this a fragment with nonzero offset? */
+
+/* The flow label in the IPv6 header.
+ *
+ * Prereqs: NXM_OF_ETH_TYPE must match 0x86dd exactly.
+ *
+ * Format: 20-bit IPv6 flow label in least-significant bits.
+ *
+ * Masking: Not maskable. */
+#define NXM_NX_IPV6_LABEL NXM_HEADER (0x0001, 27, 4)
+
+/* The ECN of the IP header.
+ *
+ * Prereqs: NXM_OF_ETH_TYPE must be either 0x0800 or 0x86dd.
+ *
+ * Format: ECN in the low-order 2 bits.
+ *
+ * Masking: Not maskable. */
+#define NXM_NX_IP_ECN NXM_HEADER (0x0001, 28, 1)
+
+/* The time-to-live/hop limit of the IP header.
+ *
+ * Prereqs: NXM_OF_ETH_TYPE must be either 0x0800 or 0x86dd.
+ *
+ * Format: 8-bit integer.
+ *
+ * Masking: Not maskable. */
+#define NXM_NX_IP_TTL NXM_HEADER (0x0001, 29, 1)
+
+/* Flow cookie.
+ *
+ * This may be used to gain the OpenFlow 1.1-like ability to restrict
+ * certain NXM-based Flow Mod and Flow Stats Request messages to flows
+ * with specific cookies. See the "nx_flow_mod" and "nx_flow_stats_request"
+ * structure definitions for more details. This match is otherwise not
+ * allowed.
+ *
+ * Prereqs: None.
+ *
+ * Format: 64-bit integer in network byte order.
+ *
+ * Masking: Arbitrary masks. */
+#define NXM_NX_COOKIE NXM_HEADER (0x0001, 30, 8)
+#define NXM_NX_COOKIE_W NXM_HEADER_W(0x0001, 30, 8)
/* ## --------------------- ## */
/* ## Requests and replies. ## */
};
/* NXT_SET_FLOW_FORMAT request. */
-struct nxt_set_flow_format {
- struct ofp_header header;
- ovs_be32 vendor; /* NX_VENDOR_ID. */
- ovs_be32 subtype; /* NXT_SET_FLOW_FORMAT. */
+struct nx_set_flow_format {
+ struct nicira_header nxh;
ovs_be32 format; /* One of NXFF_*. */
};
-OFP_ASSERT(sizeof(struct nxt_set_flow_format) == 20);
+OFP_ASSERT(sizeof(struct nx_set_flow_format) == 20);
-/* NXT_FLOW_MOD (analogous to OFPT_FLOW_MOD). */
+/* NXT_FLOW_MOD (analogous to OFPT_FLOW_MOD).
+ *
+ * It is possible to limit flow deletions and modifications to certain
+ * cookies by using the NXM_NX_COOKIE and NXM_NX_COOKIE_W matches. For
+ * these commands, the "cookie" field is always ignored. Flow additions
+ * make use of the "cookie" field and ignore any NXM_NX_COOKIE*
+ * definitions.
+ */
struct nx_flow_mod {
struct nicira_header nxh;
ovs_be64 cookie; /* Opaque controller-issued identifier. */
OFP_ASSERT(sizeof(struct nx_flow_removed) == 56);
/* Nicira vendor stats request of type NXST_FLOW (analogous to OFPST_FLOW
- * request). */
+ * request).
+ *
+ * It is possible to limit matches to certain cookies by using the
+ * NXM_NX_COOKIE and NXM_NX_COOKIE_W matches.
+ */
struct nx_flow_stats_request {
struct nicira_stats_msg nsm;
ovs_be16 out_port; /* Require matching entries to include this
OFP_ASSERT(sizeof(struct nx_flow_stats_request) == 32);
/* Body for Nicira vendor stats reply of type NXST_FLOW (analogous to
- * OFPST_FLOW reply). */
+ * OFPST_FLOW reply).
+ *
+ * The values of 'idle_age' and 'hard_age' are only meaningful when talking to
+ * a switch that implements the NXT_FLOW_AGE extension. Zero means that the
+ * true value is unknown, perhaps because hardware does not track the value.
+ * (Zero is also the value that one should ordinarily expect to see talking to
+ * a switch that does not implement NXT_FLOW_AGE, since those switches zero the
+ * padding bytes that these fields replaced.) A nonzero value X represents X-1
+ * seconds. A value of 65535 represents 65534 or more seconds.
+ *
+ * 'idle_age' is the number of seconds that the flow has been idle, that is,
+ * the number of seconds since a packet passed through the flow. 'hard_age' is
+ * the number of seconds since the flow was last modified (e.g. OFPFC_MODIFY or
+ * OFPFC_MODIFY_STRICT). (The 'duration_*' fields are the elapsed time since
+ * the flow was added, regardless of subsequent modifications.)
+ *
+ * For a flow with an idle or hard timeout, 'idle_age' or 'hard_age',
+ * respectively, will ordinarily be smaller than the timeout, but flow
+ * expiration times are only approximate and so one must be prepared to
+ * tolerate expirations that occur somewhat early or late.
+ */
struct nx_flow_stats {
ovs_be16 length; /* Length of this entry. */
uint8_t table_id; /* ID of table flow came from. */
ovs_be16 idle_timeout; /* Number of seconds idle before expiration. */
ovs_be16 hard_timeout; /* Number of seconds before expiration. */
ovs_be16 match_len; /* Length of nx_match. */
- uint8_t pad2[4]; /* Align to 64 bits. */
+ ovs_be16 idle_age; /* Seconds since last packet, plus one. */
+ ovs_be16 hard_age; /* Seconds since last modification, plus one. */
ovs_be64 cookie; /* Opaque controller-issued identifier. */
ovs_be64 packet_count; /* Number of packets, UINT64_MAX if unknown. */
ovs_be64 byte_count; /* Number of bytes, UINT64_MAX if unknown. */
uint8_t pad[4]; /* Align to 64 bits. */
};
OFP_ASSERT(sizeof(struct nx_aggregate_stats_reply) == 48);
+\f
+/* NXT_SET_CONTROLLER_ID.
+ *
+ * Each OpenFlow controller connection has a 16-bit identifier that is
+ * initially 0. This message changes the connection's ID to 'id'.
+ *
+ * Controller connection IDs need not be unique.
+ *
+ * The NXAST_CONTROLLER action is the only current user of controller
+ * connection IDs. */
+struct nx_controller_id {
+ struct nicira_header nxh;
+ uint8_t zero[6]; /* Must be zero. */
+ ovs_be16 controller_id; /* New controller connection ID. */
+};
+OFP_ASSERT(sizeof(struct nx_controller_id) == 24);
+
+/* Action structure for NXAST_CONTROLLER.
+ *
+ * This generalizes using OFPAT_OUTPUT to send a packet to OFPP_CONTROLLER. In
+ * addition to the 'max_len' that OFPAT_OUTPUT supports, it also allows
+ * specifying:
+ *
+ * - 'reason': The reason code to use in the ofp_packet_in or nx_packet_in.
+ *
+ * - 'controller_id': The ID of the controller connection to which the
+ * ofp_packet_in should be sent. The ofp_packet_in or nx_packet_in is
+ * sent only to controllers that have the specified controller connection
+ * ID. See "struct nx_controller_id" for more information. */
+struct nx_action_controller {
+ ovs_be16 type; /* OFPAT_VENDOR. */
+ ovs_be16 len; /* Length is 16. */
+ ovs_be32 vendor; /* NX_VENDOR_ID. */
+ ovs_be16 subtype; /* NXAST_CONTROLLER. */
+ ovs_be16 max_len; /* Maximum length to send to controller. */
+ ovs_be16 controller_id; /* Controller ID to send packet-in. */
+ uint8_t reason; /* enum ofp_packet_in_reason (OFPR_*). */
+ uint8_t zero; /* Must be zero. */
+};
+OFP_ASSERT(sizeof(struct nx_action_controller) == 16);
#endif /* openflow/nicira-ext.h */
git://git.onelab.eu / sliver-openvswitch.git / blobdiff