/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford * Junior University * * We are making the OpenFlow specification and associated documentation * (Software) available for public use and benefit with the expectation * that others will use, modify and enhance the Software and contribute * those enhancements back to the community. However, since we would * like to make the Software available for broadest use, with as few * restrictions as possible permission is hereby granted, free of * charge, to any person obtaining a copy of this Software to deal in * the Software under the copyrights without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * The name and trademarks of copyright holder(s) may NOT be used in * advertising or publicity pertaining to the Software or any * derivatives without specific, written prior permission. */ /* OpenFlow: protocol between controller and datapath. */ #ifndef OPENFLOW_H #define OPENFLOW_H 1 #ifdef __KERNEL__ #include #else #include #endif /* Maximum length of a OpenFlow packet. */ #define OFP_MAXLEN (sizeof(struct ofp_data_hello) \ + (sizeof(struct ofp_phy_port) * OFPP_MAX) + 200) #define OFP_VERSION 1 #define OFP_MAX_TABLE_NAME_LEN 32 #define OFP_MAX_PORT_NAME_LEN 16 #define OFP_TCP_PORT 975 #define OFP_SSL_PORT 976 #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 = 0x100, /* Fake output "ports". */ 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". */ /* xxx Want?! */ OFPP_NONE = 0xffff /* Not associated with a physical port. */ }; enum ofp_type { OFPT_CONTROL_HELLO, /* 0 Controller/switch message */ OFPT_DATA_HELLO, /* 1 Controller/switch message */ OFPT_PACKET_IN, /* 2 Async message */ OFPT_PACKET_OUT, /* 3 Controller/switch message */ OFPT_FLOW_MOD, /* 4 Controller/switch message */ OFPT_FLOW_EXPIRED, /* 5 Async message */ OFPT_TABLE, /* 6 Controller/switch message */ OFPT_PORT_MOD, /* 7 Controller/switch message */ OFPT_PORT_STATUS, /* 8 Async message */ OFPT_FLOW_STAT_REQUEST, /* 9 Controller/switch message */ OFPT_FLOW_STAT_REPLY, /* 10 Controller/switch message */ OFPT_TABLE_STAT_REQUEST, /* 11 Controller/switch message */ OFPT_TABLE_STAT_REPLY, /* 12 Controller/switch message */ OFPT_PORT_STAT_REQUEST, /* 13 Controller/switch message */ OFPT_PORT_STAT_REPLY /* 14 Controller/switch message */ }; /* Header on all OpenFlow packets. */ struct ofp_header { uint8_t version; /* Always 1. */ uint8_t type; /* One of the OFPT_ constants. */ uint16_t length; /* Length including this ofp_header. */ uint32_t xid; /* Transactin id associated with this packet. Replies use the same id as was in the request to facilitate pairing. */ }; #define OFP_DEFAULT_MISS_SEND_LEN 128 #define OFP_MISS_SEND_LEN_UNCHANGED 0xffff /* Flag to indicate that datapath should notify the controller of * expired flow entries. */ #define OFP_CHELLO_SEND_FLOW_EXP 0x0001 /* Controller hello (controller -> datapath). */ struct ofp_control_hello { struct ofp_header header; uint32_t version; /* Max supported protocol version (?) */ uint16_t flags; uint16_t miss_send_len; /* Max bytes of new flow that datapath should send to the controller. A value of OFP_MISS_SEND_LEN_UNCHANGED leaves the currently configured value unchanged. */ }; /* 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, /* 802.11d spanning tree. */ OFPC_MULTI_PHY_TX = 1 << 4 /* Supports transmitting through multiple physical interfaces */ }; /* Flags to indicate behavior of the physical port */ enum ofp_port_flags { OFPPFL_NO_FLOOD = 1 << 0, /* Do not include this port when flooding */ }; /* 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. */ }; /* 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 flags; /* Bitmap of "ofp_port_flags". */ uint32_t speed; /* Current speed in Mbps */ uint32_t features; /* Bitmap of supported "ofp_port_features"s. */ }; /* Datapath hello (datapath -> controller). */ struct ofp_data_hello { struct ofp_header header; uint64_t datapath_id; /* Datapath unique ID */ /* Table info. */ uint32_t n_exact; /* Max exact-match table entries. */ uint32_t n_mac_only; /* Max mac-only table entries. */ uint32_t n_compression; /* Max entries compressed on service port. */ uint32_t n_general; /* Max entries of arbitrary form. */ /* Buffer limits. A datapath that cannot buffer reports 0.*/ uint32_t buffer_mb; /* Space for buffering packets, in MB. */ uint32_t n_buffers; /* Max packets buffered at once. */ /* Features. */ uint32_t capabilities; /* Bitmap of support "ofp_capabilities". */ uint32_t actions; /* Bitmap of supported "ofp_action_type"s. */ /* Miscellany */ uint16_t miss_send_len; /* Currently configured value for max bytes of new flow that datapath will send to the controller. */ uint8_t pad[2]; /* Align to 32-bits */ /* Port info.*/ struct ofp_phy_port ports[0]; /* Port definitions. The number of ports is inferred from the length field in the header. */ }; /* What changed about the phsyical port */ enum ofp_port_reason { OFPPR_ADD, /* The port was added */ OFPPR_DELETE, /* The port was removed */ OFPPR_MOD /* 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[3]; /* Align to 32-bits */ struct ofp_phy_port desc; }; /* Modify behavior of the physical port */ struct ofp_port_mod { struct ofp_header header; struct ofp_phy_port desc; }; /* Why is this packet being sent to the controller? */ enum ofp_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. */ }; enum ofp_action_type { OFPAT_OUTPUT, /* Output to switch port. */ OFPAT_SET_DL_VLAN, /* VLAN. */ 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. */ }; /* An output action 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 max_len; uint16_t port; }; /* The VLAN id is 12-bits, so we'll use the entire 16 bits to indicate * special conditions. All ones is used to indicate that no VLAN id was * set, or if used as an action, that the VLAN header should be * stripped. */ #define OFP_VLAN_NONE 0xffff struct ofp_action { uint16_t type; /* One of OFPAT_* */ union { struct ofp_action_output output; /* OFPAT_OUTPUT: output struct. */ uint16_t vlan_id; /* OFPAT_SET_DL_VLAN: VLAN id. */ uint8_t dl_addr[OFP_ETH_ALEN]; /* OFPAT_SET_DL_SRC/DST */ uint32_t nw_addr; /* OFPAT_SET_NW_SRC/DST */ uint16_t tp; /* OFPAT_SET_TP_SRC/DST */ } arg; }; /* 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 out_port; /* Output port (if buffer_id == -1). */ union { struct ofp_action actions[0]; /* buffer_id != -1 */ uint8_t data[0]; /* buffer_id == -1 */ } u; }; enum ofp_flow_mod_command { OFPFC_ADD, /* New flow. */ OFPFC_DELETE, /* Delete all matching flows. */ OFPFC_DELETE_STRICT /* Strictly match wildcards. */ }; /* 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_SRC = 1 << 5, /* IP source address. */ OFPFW_NW_DST = 1 << 6, /* IP destination address. */ OFPFW_NW_PROTO = 1 << 7, /* IP protocol. */ OFPFW_TP_SRC = 1 << 8, /* TCP/UDP source port. */ OFPFW_TP_DST = 1 << 9, /* TCP/UDP destination port. */ OFPFW_ALL = (1 << 10) - 1 }; /* 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 /* Fields to match against flows */ struct ofp_match { uint16_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. */ uint32_t nw_src; /* IP source address. */ uint32_t nw_dst; /* IP destination address. */ uint8_t nw_proto; /* IP protocol. */ uint8_t pad[3]; /* Align to 32-bits */ uint16_t tp_src; /* TCP/UDP source port. */ uint16_t tp_dst; /* TCP/UDP destination port. */ }; /* Value used in "max_idle" to indicate that the entry is permanent */ #define OFP_FLOW_PERMANENT 0 /* 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 max_idle; /* Idle time before discarding (seconds). */ uint32_t buffer_id; /* Buffered packet to apply to (or -1). */ uint32_t group_id; /* Flow group ID (for QoS). */ struct ofp_action actions[0]; /* The number of actions is inferred from the length field in the header. */ }; /* Flow expiration (datapath -> controller). */ struct ofp_flow_expired { struct ofp_header header; struct ofp_match match; /* Description of fields */ uint32_t duration; /* Time flow was alive in seconds. */ uint64_t packet_count; uint64_t byte_count; }; /* Statistics about flows that match the "match" field */ struct ofp_flow_stats { struct ofp_match match; /* Description of fields */ uint32_t duration; /* Time flow has been alive in seconds. Only used for non-aggregated results. */ uint64_t packet_count; uint64_t byte_count; }; enum ofp_stat_type { OFPFS_INDIV, /* Send an entry for each matching flow */ OFPFS_AGGREGATE /* Aggregate matching flows */ }; /* Current flow statistics request */ struct ofp_flow_stat_request { struct ofp_header header; struct ofp_match match; /* Fields to match */ uint8_t type; /* One of OFPFS_ */ uint8_t pad[3]; /* Align to 32-bits */ }; /* Current flow statistics reply */ struct ofp_flow_stat_reply { struct ofp_header header; /* If request was of type OFPFS_INDIV, this will contain an array of * flow statistic entries. The number of matching flows is likely * much larger than can fit in a single OpenFlow message, so a * a response with no flows included is sent to indicate the end. * If it was a OFPFS_AGGREGATE request, only a single flow stats * entry will be contained in the response. */ struct ofp_flow_stats flows[0]; }; /* Table attributes collected at runtime */ struct ofp_table { struct ofp_header header; char name[OFP_MAX_TABLE_NAME_LEN]; uint16_t table_id; unsigned long int n_flows; unsigned long int max_flows; }; #endif /* openflow.h */