1 /* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
4 * We are making the OpenFlow specification and associated documentation
5 * (Software) available for public use and benefit with the expectation
6 * that others will use, modify and enhance the Software and contribute
7 * those enhancements back to the community. However, since we would
8 * like to make the Software available for broadest use, with as few
9 * restrictions as possible permission is hereby granted, free of
10 * charge, to any person obtaining a copy of this Software to deal in
11 * the Software under the copyrights without restriction, including
12 * without limitation the rights to use, copy, modify, merge, publish,
13 * distribute, sublicense, and/or sell copies of the Software, and to
14 * permit persons to whom the Software is furnished to do so, subject to
15 * the following conditions:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
24 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
25 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
26 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29 * The name and trademarks of copyright holder(s) may NOT be used in
30 * advertising or publicity pertaining to the Software or any
31 * derivatives without specific, written prior permission.
34 /* OpenFlow: protocol between controller and datapath. */
40 #include <linux/types.h>
45 /* Maximum length of a OpenFlow packet. */
46 #define OFP_MAXLEN (sizeof(struct ofp_switch_features) \
47 + (sizeof(struct ofp_phy_port) * OFPP_MAX) + 200)
50 #define OFP_MAX_TABLE_NAME_LEN 32
51 #define OFP_MAX_PORT_NAME_LEN 16
53 #define OFP_TCP_PORT 975
54 #define OFP_SSL_PORT 976
56 #define OFP_ETH_ALEN 6 /* Bytes in an Ethernet address. */
58 /* Port numbering. Physical ports are numbered starting from 0. */
60 /* Maximum number of physical switch ports. */
63 /* Fake output "ports". */
64 OFPP_TABLE = 0xfff9, /* Perform actions in flow table.
65 * NB: This can only be the destination
66 * port for packet-out messages.
68 OFPP_NORMAL = 0xfffa, /* Process with normal L2/L3 switching. */
69 OFPP_FLOOD = 0xfffb, /* All physical ports except input port and
70 those disabled by STP. */
71 OFPP_ALL = 0xfffc, /* All physical ports except input port. */
72 OFPP_CONTROLLER = 0xfffd, /* Send to controller. */
73 OFPP_LOCAL = 0xfffe, /* Local openflow "port". */ /* xxx Want?! */
74 OFPP_NONE = 0xffff /* Not associated with a physical port. */
78 OFPT_FEATURES_REQUEST, /* 0 Controller/switch message */
79 OFPT_FEATURES_REPLY, /* 1 Controller/switch message */
80 OFPT_GET_CONFIG_REQUEST, /* 2 Controller/switch message */
81 OFPT_GET_CONFIG_REPLY, /* 3 Controller/switch message */
82 OFPT_SET_CONFIG, /* 4 Controller/switch message */
83 OFPT_PACKET_IN, /* 5 Async message */
84 OFPT_PACKET_OUT, /* 6 Controller/switch message */
85 OFPT_FLOW_MOD, /* 7 Controller/switch message */
86 OFPT_FLOW_EXPIRED, /* 8 Async message */
87 OFPT_TABLE, /* 9 Controller/switch message */
88 OFPT_PORT_MOD, /* 10 Controller/switch message */
89 OFPT_PORT_STATUS, /* 11 Async message */
90 OFPT_FLOW_STAT_REQUEST, /* 12 Controller/switch message */
91 OFPT_FLOW_STAT_REPLY, /* 13 Controller/switch message */
92 OFPT_TABLE_STAT_REQUEST, /* 14 Controller/switch message */
93 OFPT_TABLE_STAT_REPLY, /* 15 Controller/switch message */
94 OFPT_PORT_STAT_REQUEST, /* 16 Controller/switch message */
95 OFPT_PORT_STAT_REPLY /* 17 Controller/switch message */
98 /* Header on all OpenFlow packets. */
100 uint8_t version; /* Always 1. */
101 uint8_t type; /* One of the OFPT_ constants. */
102 uint16_t length; /* Length including this ofp_header. */
103 uint32_t xid; /* Transactin id associated with this packet.
104 Replies use the same id as was in the request
105 to facilitate pairing. */
108 #define OFP_DEFAULT_MISS_SEND_LEN 128
110 enum ofp_config_flags {
111 /* Tells datapath to notify the controller of expired flow entries. */
112 OFPC_SEND_FLOW_EXP = 1 << 0
115 /* Switch configuration. */
116 struct ofp_switch_config {
117 struct ofp_header header;
118 uint16_t flags; /* OFPC_* flags. */
119 uint16_t miss_send_len; /* Max bytes of new flow that datapath should
120 send to the controller. */
123 /* Capabilities supported by the datapath. */
124 enum ofp_capabilities {
125 OFPC_FLOW_STATS = 1 << 0, /* Flow statistics. */
126 OFPC_TABLE_STATS = 1 << 1, /* Table statistics. */
127 OFPC_PORT_STATS = 1 << 2, /* Port statistics. */
128 OFPC_STP = 1 << 3, /* 802.11d spanning tree. */
129 OFPC_MULTI_PHY_TX = 1 << 4 /* Supports transmitting through multiple
130 physical interfaces */
133 /* Flags to indicate behavior of the physical port */
134 enum ofp_port_flags {
135 OFPPFL_NO_FLOOD = 1 << 0, /* Do not include this port when flooding */
138 /* Features of physical ports available in a datapath. */
139 enum ofp_port_features {
140 OFPPF_10MB_HD = 1 << 0, /* 10 Mb half-duplex rate support. */
141 OFPPF_10MB_FD = 1 << 1, /* 10 Mb full-duplex rate support. */
142 OFPPF_100MB_HD = 1 << 2, /* 100 Mb half-duplex rate support. */
143 OFPPF_100MB_FD = 1 << 3, /* 100 Mb full-duplex rate support. */
144 OFPPF_1GB_HD = 1 << 4, /* 1 Gb half-duplex rate support. */
145 OFPPF_1GB_FD = 1 << 5, /* 1 Gb full-duplex rate support. */
146 OFPPF_10GB_FD = 1 << 6, /* 10 Gb full-duplex rate support. */
150 /* Description of a physical port */
151 struct ofp_phy_port {
153 uint8_t hw_addr[OFP_ETH_ALEN];
154 uint8_t name[OFP_MAX_PORT_NAME_LEN]; /* Null-terminated */
155 uint32_t flags; /* Bitmap of "ofp_port_flags". */
156 uint32_t speed; /* Current speed in Mbps */
157 uint32_t features; /* Bitmap of supported "ofp_port_features"s. */
160 /* Switch features. */
161 struct ofp_switch_features {
162 struct ofp_header header;
163 uint64_t datapath_id; /* Datapath unique ID */
166 uint32_t n_exact; /* Max exact-match table entries. */
167 uint32_t n_mac_only; /* Max mac-only table entries. */
168 uint32_t n_compression; /* Max entries compressed on service port. */
169 uint32_t n_general; /* Max entries of arbitrary form. */
171 /* Buffer limits. A datapath that cannot buffer reports 0.*/
172 uint32_t buffer_mb; /* Space for buffering packets, in MB. */
173 uint32_t n_buffers; /* Max packets buffered at once. */
176 uint32_t capabilities; /* Bitmap of support "ofp_capabilities". */
177 uint32_t actions; /* Bitmap of supported "ofp_action_type"s. */
180 struct ofp_phy_port ports[0]; /* Port definitions. The number of ports
181 is inferred from the length field in
185 /* What changed about the phsyical port */
186 enum ofp_port_reason {
187 OFPPR_ADD, /* The port was added */
188 OFPPR_DELETE, /* The port was removed */
189 OFPPR_MOD /* Some attribute of the port has changed */
192 /* A physical port has changed in the datapath */
193 struct ofp_port_status {
194 struct ofp_header header;
195 uint8_t reason; /* One of OFPPR_* */
196 uint8_t pad[3]; /* Align to 32-bits */
197 struct ofp_phy_port desc;
200 /* Modify behavior of the physical port */
201 struct ofp_port_mod {
202 struct ofp_header header;
203 struct ofp_phy_port desc;
206 /* Why is this packet being sent to the controller? */
208 OFPR_NO_MATCH, /* No matching flow. */
209 OFPR_ACTION /* Action explicitly output to controller. */
212 /* Packet received on port (datapath -> controller). */
213 struct ofp_packet_in {
214 struct ofp_header header;
215 uint32_t buffer_id; /* ID assigned by datapath. */
216 uint16_t total_len; /* Full length of frame. */
217 uint16_t in_port; /* Port on which frame was received. */
218 uint8_t reason; /* Reason packet is being sent (one of OFPR_*) */
220 uint8_t data[0]; /* Ethernet frame, halfway through 32-bit word,
221 so the IP header is 32-bit aligned. The
222 amount of data is inferred from the length
223 field in the header. Because of padding,
224 offsetof(struct ofp_packet_in, data) ==
225 sizeof(struct ofp_packet_in) - 2. */
228 enum ofp_action_type {
229 OFPAT_OUTPUT, /* Output to switch port. */
230 OFPAT_SET_DL_VLAN, /* VLAN. */
231 OFPAT_SET_DL_SRC, /* Ethernet source address. */
232 OFPAT_SET_DL_DST, /* Ethernet destination address. */
233 OFPAT_SET_NW_SRC, /* IP source address. */
234 OFPAT_SET_NW_DST, /* IP destination address. */
235 OFPAT_SET_TP_SRC, /* TCP/UDP source port. */
236 OFPAT_SET_TP_DST /* TCP/UDP destination port. */
239 /* An output action sends packets out 'port'. When the 'port' is the
240 * OFPP_CONTROLLER, 'max_len' indicates the max number of bytes to
241 * send. A 'max_len' of zero means the entire packet should be sent. */
242 struct ofp_action_output {
247 /* The VLAN id is 12-bits, so we'll use the entire 16 bits to indicate
248 * special conditions. All ones is used to indicate that no VLAN id was
249 * set, or if used as an action, that the VLAN header should be
252 #define OFP_VLAN_NONE 0xffff
255 uint16_t type; /* One of OFPAT_* */
257 struct ofp_action_output output; /* OFPAT_OUTPUT: output struct. */
258 uint16_t vlan_id; /* OFPAT_SET_DL_VLAN: VLAN id. */
259 uint8_t dl_addr[OFP_ETH_ALEN]; /* OFPAT_SET_DL_SRC/DST */
260 uint32_t nw_addr; /* OFPAT_SET_NW_SRC/DST */
261 uint16_t tp; /* OFPAT_SET_TP_SRC/DST */
265 /* Send packet (controller -> datapath). */
266 struct ofp_packet_out {
267 struct ofp_header header;
268 uint32_t buffer_id; /* ID assigned by datapath (-1 if none). */
269 uint16_t in_port; /* Packet's input port (OFPP_NONE if none). */
270 uint16_t out_port; /* Output port (if buffer_id == -1). */
272 struct ofp_action actions[0]; /* buffer_id != -1 */
273 uint8_t data[0]; /* buffer_id == -1 */
277 enum ofp_flow_mod_command {
278 OFPFC_ADD, /* New flow. */
279 OFPFC_DELETE, /* Delete all matching flows. */
280 OFPFC_DELETE_STRICT /* Strictly match wildcards. */
283 /* Flow wildcards. */
284 enum ofp_flow_wildcards {
285 OFPFW_IN_PORT = 1 << 0, /* Switch input port. */
286 OFPFW_DL_VLAN = 1 << 1, /* VLAN. */
287 OFPFW_DL_SRC = 1 << 2, /* Ethernet source address. */
288 OFPFW_DL_DST = 1 << 3, /* Ethernet destination address. */
289 OFPFW_DL_TYPE = 1 << 4, /* Ethernet frame type. */
290 OFPFW_NW_SRC = 1 << 5, /* IP source address. */
291 OFPFW_NW_DST = 1 << 6, /* IP destination address. */
292 OFPFW_NW_PROTO = 1 << 7, /* IP protocol. */
293 OFPFW_TP_SRC = 1 << 8, /* TCP/UDP source port. */
294 OFPFW_TP_DST = 1 << 9, /* TCP/UDP destination port. */
295 OFPFW_ALL = (1 << 10) - 1
298 /* Values below this cutoff are 802.3 packets and the two bytes
299 * following MAC addresses are used as a frame length. Otherwise, the
300 * two bytes are used as the Ethernet type.
302 #define OFP_DL_TYPE_ETH2_CUTOFF 0x0600
304 /* Value of dl_type to indicate that the frame does not include an
307 #define OFP_DL_TYPE_NOT_ETH_TYPE 0x05ff
309 /* Fields to match against flows */
311 uint16_t wildcards; /* Wildcard fields. */
312 uint16_t in_port; /* Input switch port. */
313 uint8_t dl_src[OFP_ETH_ALEN]; /* Ethernet source address. */
314 uint8_t dl_dst[OFP_ETH_ALEN]; /* Ethernet destination address. */
315 uint16_t dl_vlan; /* Input VLAN. */
316 uint16_t dl_type; /* Ethernet frame type. */
317 uint32_t nw_src; /* IP source address. */
318 uint32_t nw_dst; /* IP destination address. */
319 uint8_t nw_proto; /* IP protocol. */
320 uint8_t pad[3]; /* Align to 32-bits */
321 uint16_t tp_src; /* TCP/UDP source port. */
322 uint16_t tp_dst; /* TCP/UDP destination port. */
325 /* Value used in "max_idle" to indicate that the entry is permanent */
326 #define OFP_FLOW_PERMANENT 0
328 /* Flow setup and teardown (controller -> datapath). */
329 struct ofp_flow_mod {
330 struct ofp_header header;
331 struct ofp_match match; /* Fields to match */
334 uint16_t command; /* One of OFPFC_*. */
335 uint16_t max_idle; /* Idle time before discarding (seconds). */
336 uint32_t buffer_id; /* Buffered packet to apply to (or -1). */
337 uint32_t group_id; /* Flow group ID (for QoS). */
338 struct ofp_action actions[0]; /* The number of actions is inferred from
339 the length field in the header. */
342 /* Flow expiration (datapath -> controller). */
343 struct ofp_flow_expired {
344 struct ofp_header header;
345 struct ofp_match match; /* Description of fields */
347 uint32_t duration; /* Time flow was alive in seconds. */
348 uint64_t packet_count;
352 /* Statistics about flows that match the "match" field */
353 struct ofp_flow_stats {
354 struct ofp_match match; /* Description of fields */
355 uint32_t duration; /* Time flow has been alive in seconds. Only
356 used for non-aggregated results. */
357 uint64_t packet_count; /* Number of packets in flow. */
358 uint64_t byte_count; /* Number of bytes in flow. */
359 uint8_t table_id; /* ID of table flow came from. */
360 uint8_t pad[7]; /* Align to 64-bits. */
364 OFPFS_INDIV, /* Send an entry for each matching flow */
365 OFPFS_AGGREGATE /* Aggregate matching flows */
368 /* Current flow statistics request */
369 struct ofp_flow_stat_request {
370 struct ofp_header header;
371 struct ofp_match match; /* Fields to match */
372 uint8_t table_id; /* ID of table to read (from ofp_table_stats)
373 or 0xffff for all tables. */
374 uint8_t type; /* One of OFPFS_ */
375 uint16_t pad; /* Align to 32-bits */
378 /* Current flow statistics reply */
379 struct ofp_flow_stat_reply {
380 struct ofp_header header;
382 /* If request was of type OFPFS_INDIV, this will contain an array of
383 * flow statistic entries. The number of matching flows is likely
384 * much larger than can fit in a single OpenFlow message, so a
385 * a response with no flows included is sent to indicate the end.
386 * If it was a OFPFS_AGGREGATE request, only a single flow stats
387 * entry will be contained in the response.
389 struct ofp_flow_stats flows[0];
392 /* Current table statistics request */
393 struct ofp_table_stat_request {
394 struct ofp_header header;
397 /* Statistics about a particular table */
398 struct ofp_table_stats {
400 uint8_t pad[3]; /* Align to 32-bits */
401 char name[OFP_MAX_TABLE_NAME_LEN];
402 uint32_t max_entries; /* Max number of entries supported */
403 uint32_t active_count; /* Number of active entries */
404 uint64_t matched_count; /* Number of packets that hit table */
407 /* Current table statistics reply */
408 struct ofp_table_stat_reply {
409 struct ofp_header header;
410 struct ofp_table_stats tables[]; /* The number of entries is inferred from
411 the length field in the header. */
414 /* Statistics about a particular port */
415 struct ofp_port_stats {
417 uint8_t pad[2]; /* Align to 32-bits */
418 uint64_t rx_count; /* Number of received packets */
419 uint64_t tx_count; /* Number of transmitted packets */
420 uint64_t drop_count; /* Number of packets dropped by interface */
423 /* Current port statistics request */
424 struct ofp_port_stat_request {
425 struct ofp_header header;
428 /* Current port statistics reply */
429 struct ofp_port_stat_reply {
430 struct ofp_header header;
431 struct ofp_port_stats ports[]; /* The number of entries is inferred from
432 the length field in the header. */
435 #endif /* openflow.h */