diff options
Diffstat (limited to 'include/openflow/openflow.h')
| -rw-r--r-- | include/openflow/openflow.h | 796 |
1 files changed, 796 insertions, 0 deletions
diff --git a/include/openflow/openflow.h b/include/openflow/openflow.h new file mode 100644 index 000000000..cd96c6ad0 --- /dev/null +++ b/include/openflow/openflow.h @@ -0,0 +1,796 @@ +/* + * Copyright (c) 2008, 2009 Nicira Networks. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* OpenFlow: protocol between controller and datapath. */ + +#ifndef OPENFLOW_OPENFLOW_H +#define OPENFLOW_OPENFLOW_H 1 + +#ifdef __KERNEL__ +#include <linux/types.h> +#else +#include <stdint.h> +#endif + +#ifdef SWIG +#define OFP_ASSERT(EXPR) /* SWIG can't handle OFP_ASSERT. */ +#elif !defined(__cplusplus) +/* Build-time assertion for use in a declaration context. */ +#define OFP_ASSERT(EXPR) \ + extern int (*build_assert(void))[ sizeof(struct { \ + unsigned int build_assert_failed : (EXPR) ? 1 : -1; })] +#else /* __cplusplus */ +#include <boost/static_assert.hpp> +#define OFP_ASSERT BOOST_STATIC_ASSERT +#endif /* __cplusplus */ + +#ifndef SWIG +#define OFP_PACKED __attribute__((packed)) +#else +#define OFP_PACKED /* SWIG doesn't understand __attribute. */ +#endif + +/* The most significant bit being set in the version field indicates an + * experimental OpenFlow version. + */ +#define OFP_VERSION 0x97 + +#define OFP_MAX_TABLE_NAME_LEN 32 +#define OFP_MAX_PORT_NAME_LEN 16 + +#define OFP_TCP_PORT 6633 +#define OFP_SSL_PORT 6633 + +#define OFP_ETH_ALEN 6 /* Bytes in an Ethernet address. */ + +/* Port numbering. Physical ports are numbered starting from 0. */ +enum ofp_port { + /* Maximum number of physical switch ports. */ + OFPP_MAX = 0xff00, + + /* Fake output "ports". */ + OFPP_IN_PORT = 0xfff8, /* Send the packet out the input port. This + virtual port must be explicitly used + in order to send back out of the input + port. */ + OFPP_TABLE = 0xfff9, /* Perform actions in flow table. + NB: This can only be the destination + port for packet-out messages. */ + OFPP_NORMAL = 0xfffa, /* Process with normal L2/L3 switching. */ + OFPP_FLOOD = 0xfffb, /* All physical ports except input port and + those disabled by STP. */ + OFPP_ALL = 0xfffc, /* All physical ports except input port. */ + OFPP_CONTROLLER = 0xfffd, /* Send to controller. */ + OFPP_LOCAL = 0xfffe, /* Local openflow "port". */ + OFPP_NONE = 0xffff /* Not associated with a physical port. */ +}; + +enum ofp_type { + /* Immutable messages. */ + OFPT_HELLO, /* Symmetric message */ + OFPT_ERROR, /* Symmetric message */ + OFPT_ECHO_REQUEST, /* Symmetric message */ + OFPT_ECHO_REPLY, /* Symmetric message */ + OFPT_VENDOR, /* Symmetric message */ + + /* Switch configuration messages. */ + OFPT_FEATURES_REQUEST, /* Controller/switch message */ + OFPT_FEATURES_REPLY, /* Controller/switch message */ + OFPT_GET_CONFIG_REQUEST, /* Controller/switch message */ + OFPT_GET_CONFIG_REPLY, /* Controller/switch message */ + OFPT_SET_CONFIG, /* Controller/switch message */ + + /* Asynchronous messages. */ + OFPT_PACKET_IN, /* Async message */ + OFPT_FLOW_EXPIRED, /* Async message */ + OFPT_PORT_STATUS, /* Async message */ + + /* Controller command messages. */ + OFPT_PACKET_OUT, /* Controller/switch message */ + OFPT_FLOW_MOD, /* Controller/switch message */ + OFPT_PORT_MOD, /* Controller/switch message */ + + /* Statistics messages. */ + OFPT_STATS_REQUEST, /* Controller/switch message */ + OFPT_STATS_REPLY /* Controller/switch message */ +}; + +/* Header on all OpenFlow packets. */ +struct ofp_header { + uint8_t version; /* OFP_VERSION. */ + uint8_t type; /* One of the OFPT_ constants. */ + uint16_t length; /* Length including this ofp_header. */ + uint32_t xid; /* Transaction id associated with this packet. + Replies use the same id as was in the request + to facilitate pairing. */ +}; +OFP_ASSERT(sizeof(struct ofp_header) == 8); + +/* OFPT_HELLO. This message has an empty body, but implementations must + * ignore any data included in the body, to allow for future extensions. */ +struct ofp_hello { + struct ofp_header header; +}; + +#define OFP_DEFAULT_MISS_SEND_LEN 128 + +enum ofp_config_flags { + /* Tells datapath to notify the controller of expired flow entries. */ + OFPC_SEND_FLOW_EXP = 1 << 0, + + /* Handling of IP fragments. */ + OFPC_FRAG_NORMAL = 0 << 1, /* No special handling for fragments. */ + OFPC_FRAG_DROP = 1 << 1, /* Drop fragments. */ + OFPC_FRAG_REASM = 2 << 1, /* Reassemble (only if OFPC_IP_REASM set). */ + OFPC_FRAG_MASK = 3 << 1 +}; + +/* Switch configuration. */ +struct ofp_switch_config { + struct ofp_header header; + uint16_t flags; /* OFPC_* flags. */ + uint16_t miss_send_len; /* Max bytes of new flow that datapath should + send to the controller. */ +}; +OFP_ASSERT(sizeof(struct ofp_switch_config) == 12); + +/* Capabilities supported by the datapath. */ +enum ofp_capabilities { + OFPC_FLOW_STATS = 1 << 0, /* Flow statistics. */ + OFPC_TABLE_STATS = 1 << 1, /* Table statistics. */ + OFPC_PORT_STATS = 1 << 2, /* Port statistics. */ + OFPC_STP = 1 << 3, /* 802.1d spanning tree. */ + OFPC_MULTI_PHY_TX = 1 << 4, /* Supports transmitting through multiple + physical interfaces */ + OFPC_IP_REASM = 1 << 5 /* Can reassemble IP fragments. */ +}; + +/* Flags to indicate behavior of the physical port. These flags are + * used in ofp_phy_port to describe the current configuration. They are + * used in the ofp_port_mod message to configure the port's behavior. + */ +enum ofp_port_config { + OFPPC_PORT_DOWN = 1 << 0, /* Port is administratively down. */ + + OFPPC_NO_STP = 1 << 1, /* Disable 802.1D spanning tree on port. */ + OFPPC_NO_RECV = 1 << 2, /* Drop most packets received on port. */ + OFPPC_NO_RECV_STP = 1 << 3, /* Drop received 802.1D STP packets. */ + OFPPC_NO_FLOOD = 1 << 4, /* Do not include this port when flooding. */ + OFPPC_NO_FWD = 1 << 5, /* Drop packets forwarded to port. */ + OFPPC_NO_PACKET_IN = 1 << 6 /* Do not send packet-in msgs for port. */ +}; + +/* Current state of the physical port. These are not configurable from + * the controller. + */ +enum ofp_port_state { + OFPPS_LINK_DOWN = 1 << 0, /* No physical link present. */ + + /* The OFPPS_STP_* bits have no effect on switch operation. The + * controller must adjust OFPPC_NO_RECV, OFPPC_NO_FWD, and + * OFPPC_NO_PACKET_IN appropriately to fully implement an 802.1D spanning + * tree. */ + OFPPS_STP_LISTEN = 0 << 8, /* Not learning or relaying frames. */ + OFPPS_STP_LEARN = 1 << 8, /* Learning but not relaying frames. */ + OFPPS_STP_FORWARD = 2 << 8, /* Learning and relaying frames. */ + OFPPS_STP_BLOCK = 3 << 8, /* Not part of spanning tree. */ + OFPPS_STP_MASK = 3 << 8 /* Bit mask for OFPPS_STP_* values. */ +}; + +/* Features of physical ports available in a datapath. */ +enum ofp_port_features { + OFPPF_10MB_HD = 1 << 0, /* 10 Mb half-duplex rate support. */ + OFPPF_10MB_FD = 1 << 1, /* 10 Mb full-duplex rate support. */ + OFPPF_100MB_HD = 1 << 2, /* 100 Mb half-duplex rate support. */ + OFPPF_100MB_FD = 1 << 3, /* 100 Mb full-duplex rate support. */ + OFPPF_1GB_HD = 1 << 4, /* 1 Gb half-duplex rate support. */ + OFPPF_1GB_FD = 1 << 5, /* 1 Gb full-duplex rate support. */ + OFPPF_10GB_FD = 1 << 6, /* 10 Gb full-duplex rate support. */ + OFPPF_COPPER = 1 << 7, /* Copper medium. */ + OFPPF_FIBER = 1 << 8, /* Fiber medium. */ + OFPPF_AUTONEG = 1 << 9, /* Auto-negotiation. */ + OFPPF_PAUSE = 1 << 10, /* Pause. */ + OFPPF_PAUSE_ASYM = 1 << 11 /* Asymmetric pause. */ +}; + +/* Description of a physical port */ +struct ofp_phy_port { + uint16_t port_no; + uint8_t hw_addr[OFP_ETH_ALEN]; + uint8_t name[OFP_MAX_PORT_NAME_LEN]; /* Null-terminated */ + + uint32_t config; /* Bitmap of OFPPC_* flags. */ + uint32_t state; /* Bitmap of OFPPS_* flags. */ + + /* Bitmaps of OFPPF_* that describe features. All bits zeroed if + * unsupported or unavailable. */ + uint32_t curr; /* Current features. */ + uint32_t advertised; /* Features being advertised by the port. */ + uint32_t supported; /* Features supported by the port. */ + uint32_t peer; /* Features advertised by peer. */ +}; +OFP_ASSERT(sizeof(struct ofp_phy_port) == 48); + +/* Switch features. */ +struct ofp_switch_features { + struct ofp_header header; + uint64_t datapath_id; /* Datapath unique ID. Only the lower 48-bits + are meaningful. */ + + uint32_t n_buffers; /* Max packets buffered at once. */ + + uint8_t n_tables; /* Number of tables supported by datapath. */ + uint8_t pad[3]; /* Align to 64-bits. */ + + /* Features. */ + uint32_t capabilities; /* Bitmap of support "ofp_capabilities". */ + uint32_t actions; /* Bitmap of supported "ofp_action_type"s. */ + + /* Port info.*/ + struct ofp_phy_port ports[0]; /* Port definitions. The number of ports + is inferred from the length field in + the header. */ +}; +OFP_ASSERT(sizeof(struct ofp_switch_features) == 32); + +/* What changed about the physical port */ +enum ofp_port_reason { + OFPPR_ADD, /* The port was added. */ + OFPPR_DELETE, /* The port was removed. */ + OFPPR_MODIFY /* Some attribute of the port has changed. */ +}; + +/* A physical port has changed in the datapath */ +struct ofp_port_status { + struct ofp_header header; + uint8_t reason; /* One of OFPPR_*. */ + uint8_t pad[7]; /* Align to 64-bits. */ + struct ofp_phy_port desc; +}; +OFP_ASSERT(sizeof(struct ofp_port_status) == 64); + +/* Modify behavior of the physical port */ +struct ofp_port_mod { + struct ofp_header header; + uint16_t port_no; + uint8_t hw_addr[OFP_ETH_ALEN]; /* The hardware address is not + configurable. This is used to + sanity-check the request, so it must + be the same as returned in an + ofp_phy_port struct. */ + + uint32_t config; /* Bitmap of OFPPC_* flags. */ + uint32_t mask; /* Bitmap of OFPPC_* flags to be changed. */ + + uint32_t advertise; /* Bitmap of "ofp_port_features"s. Zero all + bits to prevent any action taking place. */ + uint8_t pad[4]; /* Pad to 64-bits. */ +}; +OFP_ASSERT(sizeof(struct ofp_port_mod) == 32); + +/* Why is this packet being sent to the controller? */ +enum ofp_packet_in_reason { + OFPR_NO_MATCH, /* No matching flow. */ + OFPR_ACTION /* Action explicitly output to controller. */ +}; + +/* Packet received on port (datapath -> controller). */ +struct ofp_packet_in { + struct ofp_header header; + uint32_t buffer_id; /* ID assigned by datapath. */ + uint16_t total_len; /* Full length of frame. */ + uint16_t in_port; /* Port on which frame was received. */ + uint8_t reason; /* Reason packet is being sent (one of OFPR_*) */ + uint8_t pad; + uint8_t data[0]; /* Ethernet frame, halfway through 32-bit word, + so the IP header is 32-bit aligned. The + amount of data is inferred from the length + field in the header. Because of padding, + offsetof(struct ofp_packet_in, data) == + sizeof(struct ofp_packet_in) - 2. */ +}; +OFP_ASSERT(sizeof(struct ofp_packet_in) == 20); + +enum ofp_action_type { + OFPAT_OUTPUT, /* Output to switch port. */ + OFPAT_SET_VLAN_VID, /* Set the 802.1q VLAN id. */ + OFPAT_SET_VLAN_PCP, /* Set the 802.1q priority. */ + OFPAT_STRIP_VLAN, /* Strip the 802.1q header. */ + OFPAT_SET_DL_SRC, /* Ethernet source address. */ + OFPAT_SET_DL_DST, /* Ethernet destination address. */ + OFPAT_SET_NW_SRC, /* IP source address. */ + OFPAT_SET_NW_DST, /* IP destination address. */ + OFPAT_SET_TP_SRC, /* TCP/UDP source port. */ + OFPAT_SET_TP_DST, /* TCP/UDP destination port. */ + OFPAT_VENDOR = 0xffff +}; + +/* Action structure for OFPAT_OUTPUT, which sends packets out 'port'. + * When the 'port' is the OFPP_CONTROLLER, 'max_len' indicates the max + * number of bytes to send. A 'max_len' of zero means the entire packet + * should be sent. */ +struct ofp_action_output { + uint16_t type; /* OFPAT_OUTPUT. */ + uint16_t len; /* Length is 8. */ + uint16_t port; /* Output port. */ + uint16_t max_len; /* Max length to send to controller. */ +}; +OFP_ASSERT(sizeof(struct ofp_action_output) == 8); + +/* The VLAN id is 12 bits, so we can use the entire 16 bits to indicate + * special conditions. All ones is used to match that no VLAN id was + * set. */ +#define OFP_VLAN_NONE 0xffff + +/* Action structure for OFPAT_SET_VLAN_VID. */ +struct ofp_action_vlan_vid { + uint16_t type; /* OFPAT_SET_VLAN_VID. */ + uint16_t len; /* Length is 8. */ + uint16_t vlan_vid; /* VLAN id. */ + uint8_t pad[2]; +}; +OFP_ASSERT(sizeof(struct ofp_action_vlan_vid) == 8); + +/* Action structure for OFPAT_SET_VLAN_PCP. */ +struct ofp_action_vlan_pcp { + uint16_t type; /* OFPAT_SET_VLAN_PCP. */ + uint16_t len; /* Length is 8. */ + uint8_t vlan_pcp; /* VLAN priority. */ + uint8_t pad[3]; +}; +OFP_ASSERT(sizeof(struct ofp_action_vlan_vid) == 8); + +/* Action structure for OFPAT_SET_DL_SRC/DST. */ +struct ofp_action_dl_addr { + uint16_t type; /* OFPAT_SET_DL_SRC/DST. */ + uint16_t len; /* Length is 16. */ + uint8_t dl_addr[OFP_ETH_ALEN]; /* Ethernet address. */ + uint8_t pad[6]; +}; +OFP_ASSERT(sizeof(struct ofp_action_dl_addr) == 16); + +/* Action structure for OFPAT_SET_NW_SRC/DST. */ +struct ofp_action_nw_addr { + uint16_t type; /* OFPAT_SET_TW_SRC/DST. */ + uint16_t len; /* Length is 8. */ + uint32_t nw_addr; /* IP address. */ +}; +OFP_ASSERT(sizeof(struct ofp_action_nw_addr) == 8); + +/* Action structure for OFPAT_SET_TP_SRC/DST. */ +struct ofp_action_tp_port { + uint16_t type; /* OFPAT_SET_TP_SRC/DST. */ + uint16_t len; /* Length is 8. */ + uint16_t tp_port; /* TCP/UDP port. */ + uint8_t pad[2]; +}; +OFP_ASSERT(sizeof(struct ofp_action_tp_port) == 8); + +/* Action header for OFPAT_VENDOR. The rest of the body is vendor-defined. */ +struct ofp_action_vendor_header { + uint16_t type; /* OFPAT_VENDOR. */ + uint16_t len; /* Length is a multiple of 8. */ + uint32_t vendor; /* Vendor ID, which takes the same form + as in "struct ofp_vendor_header". */ +}; +OFP_ASSERT(sizeof(struct ofp_action_vendor_header) == 8); + +/* Action header that is common to all actions. The length includes the + * header and any padding used to make the action 64-bit aligned. + * NB: The length of an action *must* always be a multiple of eight. */ +struct ofp_action_header { + uint16_t type; /* One of OFPAT_*. */ + uint16_t len; /* Length of action, including this + header. This is the length of action, + including any padding to make it + 64-bit aligned. */ + uint8_t pad[4]; +}; +OFP_ASSERT(sizeof(struct ofp_action_header) == 8); + +union ofp_action { + uint16_t type; + struct ofp_action_header header; + struct ofp_action_vendor_header vendor; + struct ofp_action_output output; + struct ofp_action_vlan_vid vlan_vid; + struct ofp_action_vlan_pcp vlan_pcp; + struct ofp_action_nw_addr nw_addr; + struct ofp_action_tp_port tp_port; +}; +OFP_ASSERT(sizeof(union ofp_action) == 8); + +/* Send packet (controller -> datapath). */ +struct ofp_packet_out { + struct ofp_header header; + uint32_t buffer_id; /* ID assigned by datapath (-1 if none). */ + uint16_t in_port; /* Packet's input port (OFPP_NONE if none). */ + uint16_t actions_len; /* Size of action array in bytes. */ + struct ofp_action_header actions[0]; /* Actions. */ + /* uint8_t data[0]; */ /* Packet data. The length is inferred + from the length field in the header. + (Only meaningful if buffer_id == -1.) */ +}; +OFP_ASSERT(sizeof(struct ofp_packet_out) == 16); + +enum ofp_flow_mod_command { + OFPFC_ADD, /* New flow. */ + OFPFC_MODIFY, /* Modify all matching flows. */ + OFPFC_MODIFY_STRICT, /* Modify entry strictly matching wildcards */ + OFPFC_DELETE, /* Delete all matching flows. */ + OFPFC_DELETE_STRICT /* Strictly match wildcards and priority. */ +}; + +/* Flow wildcards. */ +enum ofp_flow_wildcards { + OFPFW_IN_PORT = 1 << 0, /* Switch input port. */ + OFPFW_DL_VLAN = 1 << 1, /* VLAN. */ + OFPFW_DL_SRC = 1 << 2, /* Ethernet source address. */ + OFPFW_DL_DST = 1 << 3, /* Ethernet destination address. */ + OFPFW_DL_TYPE = 1 << 4, /* Ethernet frame type. */ + OFPFW_NW_PROTO = 1 << 5, /* IP protocol. */ + OFPFW_TP_SRC = 1 << 6, /* TCP/UDP source port. */ + OFPFW_TP_DST = 1 << 7, /* TCP/UDP destination port. */ + + /* IP source address wildcard bit count. 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. */ + OFPFW_NW_SRC_SHIFT = 8, + OFPFW_NW_SRC_BITS = 6, + OFPFW_NW_SRC_MASK = ((1 << OFPFW_NW_SRC_BITS) - 1) << OFPFW_NW_SRC_SHIFT, + OFPFW_NW_SRC_ALL = 32 << OFPFW_NW_SRC_SHIFT, + + /* IP destination address wildcard bit count. Same format as source. */ + OFPFW_NW_DST_SHIFT = 14, + OFPFW_NW_DST_BITS = 6, + OFPFW_NW_DST_MASK = ((1 << OFPFW_NW_DST_BITS) - 1) << OFPFW_NW_DST_SHIFT, + OFPFW_NW_DST_ALL = 32 << OFPFW_NW_DST_SHIFT, + + /* Wildcard all fields. */ + OFPFW_ALL = ((1 << 20) - 1) +}; + +/* The wildcards for ICMP type and code fields use the transport source + * and destination port fields, respectively. */ +#define OFPFW_ICMP_TYPE OFPFW_TP_SRC +#define OFPFW_ICMP_CODE OFPFW_TP_DST + +/* Values below this cutoff are 802.3 packets and the two bytes + * following MAC addresses are used as a frame length. Otherwise, the + * two bytes are used as the Ethernet type. + */ +#define OFP_DL_TYPE_ETH2_CUTOFF 0x0600 + +/* Value of dl_type to indicate that the frame does not include an + * Ethernet type. + */ +#define OFP_DL_TYPE_NOT_ETH_TYPE 0x05ff + +/* The VLAN id is 12-bits, so we can use the entire 16 bits to indicate + * special conditions. All ones indicates that no VLAN id was set. + */ +#define OFP_VLAN_NONE 0xffff + +/* Fields to match against flows */ +struct ofp_match { + uint32_t wildcards; /* Wildcard fields. */ + uint16_t in_port; /* Input switch port. */ + uint8_t dl_src[OFP_ETH_ALEN]; /* Ethernet source address. */ + uint8_t dl_dst[OFP_ETH_ALEN]; /* Ethernet destination address. */ + uint16_t dl_vlan; /* Input VLAN. */ + uint16_t dl_type; /* Ethernet frame type. */ + uint8_t nw_proto; /* IP protocol. */ + uint8_t pad; /* Align to 32-bits. */ + uint32_t nw_src; /* IP source address. */ + uint32_t nw_dst; /* IP destination address. */ + uint16_t tp_src; /* TCP/UDP source port. */ + uint16_t tp_dst; /* TCP/UDP destination port. */ +}; +OFP_ASSERT(sizeof(struct ofp_match) == 36); + +/* The match fields for ICMP type and code use the transport source and + * destination port fields, respectively. */ +#define icmp_type tp_src +#define icmp_code tp_dst + +/* Value used in "idle_timeout" and "hard_timeout" to indicate that the entry + * is permanent. */ +#define OFP_FLOW_PERMANENT 0 + +/* By default, choose a priority in the middle. */ +#define OFP_DEFAULT_PRIORITY 0x8000 + +/* Flow setup and teardown (controller -> datapath). */ +struct ofp_flow_mod { + struct ofp_header header; + struct ofp_match match; /* Fields to match */ + + /* Flow actions. */ + uint16_t command; /* One of OFPFC_*. */ + uint16_t idle_timeout; /* Idle time before discarding (seconds). */ + uint16_t hard_timeout; /* Max time before discarding (seconds). */ + uint16_t priority; /* Priority level of flow entry. */ + uint32_t buffer_id; /* Buffered packet to apply to (or -1). + Not meaningful for OFPFC_DELETE*. */ + uint16_t out_port; /* For OFPFC_DELETE* commands, require + matching entries to include this as an + output port. A value of OFPP_NONE + indicates no restriction. */ + uint8_t pad[2]; /* Align to 32-bits. */ + uint32_t reserved; /* Reserved for future use. */ + struct ofp_action_header actions[0]; /* The action length is inferred + from the length field in the + header. */ +}; +OFP_ASSERT(sizeof(struct ofp_flow_mod) == 64); + +/* Why did this flow expire? */ +enum ofp_flow_expired_reason { + OFPER_IDLE_TIMEOUT, /* Flow idle time exceeded idle_timeout. */ + OFPER_HARD_TIMEOUT /* Time exceeded hard_timeout. */ +}; + +/* Flow expiration (datapath -> controller). */ +struct ofp_flow_expired { + struct ofp_header header; + struct ofp_match match; /* Description of fields. */ + + uint16_t priority; /* Priority level of flow entry. */ + uint8_t reason; /* One of OFPER_*. */ + uint8_t pad[1]; /* Align to 32-bits. */ + + uint32_t duration; /* Time flow was alive in seconds. */ + uint8_t pad2[4]; /* Align to 64-bits. */ + uint64_t packet_count; + uint64_t byte_count; +}; +OFP_ASSERT(sizeof(struct ofp_flow_expired) == 72); + +/* Values for 'type' in ofp_error_message. These values are immutable: they + * will not change in future versions of the protocol (although new values may + * be added). */ +enum ofp_error_type { + OFPET_HELLO_FAILED, /* Hello protocol failed. */ + OFPET_BAD_REQUEST, /* Request was not understood. */ + OFPET_BAD_ACTION, /* Error in action description. */ + OFPET_FLOW_MOD_FAILED, /* Problem modifying flow entry. */ + OFPET_PORT_MOD_FAILED /* OFPT_PORT_MOD failed. */ +}; + +/* ofp_error_msg 'code' values for OFPET_HELLO_FAILED. 'data' contains an + * ASCII text string that may give failure details. */ +enum ofp_hello_failed_code { + OFPHFC_INCOMPATIBLE /* No compatible version. */ +}; + +/* ofp_error_msg 'code' values for OFPET_BAD_REQUEST. 'data' contains at least + * the first 64 bytes of the failed request. */ +enum ofp_bad_request_code { + OFPBRC_BAD_VERSION, /* ofp_header.version not supported. */ + OFPBRC_BAD_TYPE, /* ofp_header.type not supported. */ + OFPBRC_BAD_STAT, /* ofp_stats_request.type not supported. */ + OFPBRC_BAD_VENDOR, /* Vendor not supported (in ofp_vendor_header + * or ofp_stats_request or ofp_stats_reply). */ + OFPBRC_BAD_SUBTYPE, /* Vendor subtype not supported. */ + OFPBRC_BAD_LENGTH, /* Wrong request length for type. */ + OFPBRC_BUFFER_EMPTY, /* Specified buffer has already been used. */ + OFPBRC_BAD_COOKIE /* Specified buffer does not exist. */ +}; + +/* ofp_error_msg 'code' values for OFPET_BAD_ACTION. 'data' contains at least + * the first 64 bytes of the failed request. */ +enum ofp_bad_action_code { + OFPBAC_BAD_TYPE, /* Unknown action type. */ + OFPBAC_BAD_LEN, /* Length problem in actions. */ + OFPBAC_BAD_VENDOR, /* Unknown vendor id specified. */ + OFPBAC_BAD_VENDOR_TYPE, /* Unknown action type for vendor id. */ + OFPBAC_BAD_OUT_PORT, /* Problem validating output action. */ + OFPBAC_BAD_ARGUMENT, /* Bad action argument. */ + OFPBAC_TOO_MANY /* Can't handle this many actions. */ +}; + +/* ofp_error_msg 'code' values for OFPET_FLOW_MOD_FAILED. 'data' contains + * at least the first 64 bytes of the failed request. */ +enum ofp_flow_mod_failed_code { + OFPFMFC_ALL_TABLES_FULL, /* Flow not added because of full tables. */ + OFPFMFC_BAD_COMMAND /* Unknown command. */ +}; + +/* ofp_error_msg 'code' values for OFPET_PORT_MOD_FAILED. 'data' contains + * at least the first 64 bytes of the failed request. */ +enum ofp_port_mod_failed_code { + OFPPMFC_BAD_PORT, /* Specified port does not exist. */ + OFPPMFC_BAD_HW_ADDR, /* Specified hardware address is wrong. */ +}; + +/* OFPT_ERROR: Error message (datapath -> controller). */ +struct ofp_error_msg { + struct ofp_header header; + + uint16_t type; + uint16_t code; + uint8_t data[0]; /* Variable-length data. Interpreted based + on the type and code. */ +}; +OFP_ASSERT(sizeof(struct ofp_error_msg) == 12); + +enum ofp_stats_types { + /* Description of this OpenFlow switch. + * The request body is empty. + * The reply body is struct ofp_desc_stats. */ + OFPST_DESC, + + /* Individual flow statistics. + * The request body is struct ofp_flow_stats_request. + * The reply body is an array of struct ofp_flow_stats. */ + OFPST_FLOW, + + /* Aggregate flow statistics. + * The request body is struct ofp_aggregate_stats_request. + * The reply body is struct ofp_aggregate_stats_reply. */ + OFPST_AGGREGATE, + + /* Flow table statistics. + * The request body is empty. + * The reply body is an array of struct ofp_table_stats. */ + OFPST_TABLE, + + /* Physical port statistics. + * The request body is empty. + * The reply body is an array of struct ofp_port_stats. */ + OFPST_PORT, + + /* Vendor extension. + * The request and reply bodies begin with a 32-bit vendor ID, which takes + * the same form as in "struct ofp_vendor_header". The request and reply + * bodies are otherwise vendor-defined. */ + OFPST_VENDOR = 0xffff +}; + +struct ofp_stats_request { + struct ofp_header header; + uint16_t type; /* One of the OFPST_* constants. */ + uint16_t flags; /* OFPSF_REQ_* flags (none yet defined). */ + uint8_t body[0]; /* Body of the request. */ +}; +OFP_ASSERT(sizeof(struct ofp_stats_request) == 12); + +enum ofp_stats_reply_flags { + OFPSF_REPLY_MORE = 1 << 0 /* More replies to follow. */ +}; + +struct ofp_stats_reply { + struct ofp_header header; + uint16_t type; /* One of the OFPST_* constants. */ + uint16_t flags; /* OFPSF_REPLY_* flags. */ + uint8_t body[0]; /* Body of the reply. */ +}; +OFP_ASSERT(sizeof(struct ofp_stats_reply) == 12); + +#define DESC_STR_LEN 256 +#define SERIAL_NUM_LEN 32 +/* Body of reply to OFPST_DESC request. Each entry is a NULL-terminated + * ASCII string. */ +struct ofp_desc_stats { + char mfr_desc[DESC_STR_LEN]; /* Manufacturer description. */ + char hw_desc[DESC_STR_LEN]; /* Hardware description. */ + char sw_desc[DESC_STR_LEN]; /* Software description. */ + char serial_num[SERIAL_NUM_LEN]; /* Serial number. */ +}; +OFP_ASSERT(sizeof(struct ofp_desc_stats) == 800); + +/* Body for ofp_stats_request of type OFPST_FLOW. */ +struct ofp_flow_stats_request { + struct ofp_match match; /* Fields to match. */ + uint8_t table_id; /* ID of table to read (from ofp_table_stats) + or 0xff for all tables. */ + uint8_t pad; /* Align to 32 bits. */ + uint16_t out_port; /* Require matching entries to include this + as an output port. A value of OFPP_NONE + indicates no restriction. */ +}; +OFP_ASSERT(sizeof(struct ofp_flow_stats_request) == 40); + +/* Body of reply to OFPST_FLOW request. */ +struct ofp_flow_stats { + uint16_t length; /* Length of this entry. */ + uint8_t table_id; /* ID of table flow came from. */ + uint8_t pad; + struct ofp_match match; /* Description of fields. */ + uint32_t duration; /* Time flow has been alive in seconds. */ + uint16_t priority; /* Priority of the entry. Only meaningful + when this is not an exact-match entry. */ + uint16_t idle_timeout; /* Number of seconds idle before expiration. */ + uint16_t hard_timeout; /* Number of seconds before expiration. */ + uint16_t pad2[3]; /* Pad to 64 bits. */ + uint64_t packet_count; /* Number of packets in flow. */ + uint64_t byte_count; /* Number of bytes in flow. */ + struct ofp_action_header actions[0]; /* Actions. */ +}; +OFP_ASSERT(sizeof(struct ofp_flow_stats) == 72); + +/* Body for ofp_stats_request of type OFPST_AGGREGATE. */ +struct ofp_aggregate_stats_request { + struct ofp_match match; /* Fields to match. */ + uint8_t table_id; /* ID of table to read (from ofp_table_stats) + or 0xff for all tables. */ + uint8_t pad; /* Align to 32 bits. */ + uint16_t out_port; /* Require matching entries to include this + as an output port. A value of OFPP_NONE + indicates no restriction. */ +}; +OFP_ASSERT(sizeof(struct ofp_aggregate_stats_request) == 40); + +/* Body of reply to OFPST_AGGREGATE request. */ +struct ofp_aggregate_stats_reply { + uint64_t packet_count; /* Number of packets in flows. */ + uint64_t byte_count; /* Number of bytes in flows. */ + uint32_t flow_count; /* Number of flows. */ + uint8_t pad[4]; /* Align to 64 bits. */ +}; +OFP_ASSERT(sizeof(struct ofp_aggregate_stats_reply) == 24); + +/* Body of reply to OFPST_TABLE request. */ +struct ofp_table_stats { + uint8_t table_id; /* Identifier of table. Lower numbered tables + are consulted first. */ + uint8_t pad[3]; /* Align to 32-bits. */ + char name[OFP_MAX_TABLE_NAME_LEN]; + uint32_t wildcards; /* Bitmap of OFPFW_* wildcards that are + supported by the table. */ + uint32_t max_entries; /* Max number of entries supported. */ + uint32_t active_count; /* Number of active entries. */ + uint64_t lookup_count; /* Number of packets looked up in table. */ + uint64_t matched_count; /* Number of packets that hit table. */ +}; +OFP_ASSERT(sizeof(struct ofp_table_stats) == 64); + +/* Body of reply to OFPST_PORT request. If a counter is unsupported, set + * the field to all ones. */ +struct ofp_port_stats { + uint16_t port_no; + uint8_t pad[6]; /* Align to 64-bits. */ + uint64_t rx_packets; /* Number of received packets. */ + uint64_t tx_packets; /* Number of transmitted packets. */ + uint64_t rx_bytes; /* Number of received bytes. */ + uint64_t tx_bytes; /* Number of transmitted bytes. */ + uint64_t rx_dropped; /* Number of packets dropped by RX. */ + uint64_t tx_dropped; /* Number of packets dropped by TX. */ + uint64_t rx_errors; /* Number of receive errors. This is a super-set + of receive errors and should be great than or + equal to the sum of all rx_*_err values. */ + uint64_t tx_errors; /* Number of transmit errors. This is a super-set + of transmit errors. */ + uint64_t rx_frame_err; /* Number of frame alignment errors. */ + uint64_t rx_over_err; /* Number of packets with RX overrun. */ + uint64_t rx_crc_err; /* Number of CRC errors. */ + uint64_t collisions; /* Number of collisions. */ +}; +OFP_ASSERT(sizeof(struct ofp_port_stats) == 104); + +/* Vendor extension. */ +struct ofp_vendor_header { + struct ofp_header header; /* Type OFPT_VENDOR. */ + uint32_t vendor; /* Vendor ID: + * - MSB 0: low-order bytes are IEEE OUI. + * - MSB != 0: defined by OpenFlow + * consortium. */ + /* Vendor-defined arbitrary additional data. */ +}; +OFP_ASSERT(sizeof(struct ofp_vendor_header) == 12); + +#endif /* openflow/openflow.h */ |