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 /* The most significant bit being set in the version field indicates an
51 * experimental OpenFlow version.
53 #define OFP_VERSION 0x83
55 #define OFP_MAX_TABLE_NAME_LEN 32
56 #define OFP_MAX_PORT_NAME_LEN 16
58 #define OFP_TCP_PORT 975
59 #define OFP_SSL_PORT 976
61 #define OFP_ETH_ALEN 6 /* Bytes in an Ethernet address. */
63 /* Port numbering. Physical ports are numbered starting from 0. */
65 /* Maximum number of physical switch ports. */
68 /* Fake output "ports". */
69 OFPP_TABLE = 0xfff9, /* Perform actions in flow table.
70 * NB: This can only be the destination
71 * port for packet-out messages.
73 OFPP_NORMAL = 0xfffa, /* Process with normal L2/L3 switching. */
74 OFPP_FLOOD = 0xfffb, /* All physical ports except input port and
75 those disabled by STP. */
76 OFPP_ALL = 0xfffc, /* All physical ports except input port. */
77 OFPP_CONTROLLER = 0xfffd, /* Send to controller. */
78 OFPP_LOCAL = 0xfffe, /* Local openflow "port". */ /* xxx Want?! */
79 OFPP_NONE = 0xffff /* Not associated with a physical port. */
83 OFPT_FEATURES_REQUEST, /* 0 Controller/switch message */
84 OFPT_FEATURES_REPLY, /* 1 Controller/switch message */
85 OFPT_GET_CONFIG_REQUEST, /* 2 Controller/switch message */
86 OFPT_GET_CONFIG_REPLY, /* 3 Controller/switch message */
87 OFPT_SET_CONFIG, /* 4 Controller/switch message */
88 OFPT_PACKET_IN, /* 5 Async message */
89 OFPT_PACKET_OUT, /* 6 Controller/switch message */
90 OFPT_FLOW_MOD, /* 7 Controller/switch message */
91 OFPT_FLOW_EXPIRED, /* 8 Async message */
92 OFPT_TABLE, /* 9 Controller/switch message */
93 OFPT_PORT_MOD, /* 10 Controller/switch message */
94 OFPT_PORT_STATUS, /* 11 Async message */
95 OFPT_ERROR_MSG, /* 12 Async message */
96 OFPT_STATS_REQUEST, /* 13 Controller/switch message */
97 OFPT_STATS_REPLY /* 14 Controller/switch message */
100 /* Header on all OpenFlow packets. */
102 uint8_t version; /* OFP_VERSION. */
103 uint8_t type; /* One of the OFPT_ constants. */
104 uint16_t length; /* Length including this ofp_header. */
105 uint32_t xid; /* Transactin id associated with this packet.
106 Replies use the same id as was in the request
107 to facilitate pairing. */
110 #define OFP_DEFAULT_MISS_SEND_LEN 128
112 enum ofp_config_flags {
113 /* Tells datapath to notify the controller of expired flow entries. */
114 OFPC_SEND_FLOW_EXP = 1 << 0
117 /* Switch configuration. */
118 struct ofp_switch_config {
119 struct ofp_header header;
120 uint16_t flags; /* OFPC_* flags. */
121 uint16_t miss_send_len; /* Max bytes of new flow that datapath should
122 send to the controller. */
125 /* Capabilities supported by the datapath. */
126 enum ofp_capabilities {
127 OFPC_FLOW_STATS = 1 << 0, /* Flow statistics. */
128 OFPC_TABLE_STATS = 1 << 1, /* Table statistics. */
129 OFPC_PORT_STATS = 1 << 2, /* Port statistics. */
130 OFPC_STP = 1 << 3, /* 802.11d spanning tree. */
131 OFPC_MULTI_PHY_TX = 1 << 4 /* Supports transmitting through multiple
132 physical interfaces */
135 /* Flags to indicate behavior of the physical port */
136 enum ofp_port_flags {
137 OFPPFL_NO_FLOOD = 1 << 0, /* Do not include this port when flooding */
140 /* Features of physical ports available in a datapath. */
141 enum ofp_port_features {
142 OFPPF_10MB_HD = 1 << 0, /* 10 Mb half-duplex rate support. */
143 OFPPF_10MB_FD = 1 << 1, /* 10 Mb full-duplex rate support. */
144 OFPPF_100MB_HD = 1 << 2, /* 100 Mb half-duplex rate support. */
145 OFPPF_100MB_FD = 1 << 3, /* 100 Mb full-duplex rate support. */
146 OFPPF_1GB_HD = 1 << 4, /* 1 Gb half-duplex rate support. */
147 OFPPF_1GB_FD = 1 << 5, /* 1 Gb full-duplex rate support. */
148 OFPPF_10GB_FD = 1 << 6, /* 10 Gb full-duplex rate support. */
152 /* Description of a physical port */
153 struct ofp_phy_port {
155 uint8_t hw_addr[OFP_ETH_ALEN];
156 uint8_t name[OFP_MAX_PORT_NAME_LEN]; /* Null-terminated */
157 uint32_t flags; /* Bitmap of "ofp_port_flags". */
158 uint32_t speed; /* Current speed in Mbps */
159 uint32_t features; /* Bitmap of supported "ofp_port_features"s. */
162 /* Switch features. */
163 struct ofp_switch_features {
164 struct ofp_header header;
165 uint64_t datapath_id; /* Datapath unique ID */
168 uint32_t n_exact; /* Max exact-match table entries. */
169 uint32_t n_compression; /* Max entries compressed on service port. */
170 uint32_t n_general; /* Max entries of arbitrary form. */
172 /* Buffer limits. A datapath that cannot buffer reports 0.*/
173 uint32_t buffer_mb; /* Space for buffering packets, in MB. */
174 uint32_t n_buffers; /* Max packets buffered at once. */
177 uint32_t capabilities; /* Bitmap of support "ofp_capabilities". */
178 uint32_t actions; /* Bitmap of supported "ofp_action_type"s. */
181 struct ofp_phy_port ports[0]; /* Port definitions. The number of ports
182 is inferred from the length field in
186 /* What changed about the phsyical port */
187 enum ofp_port_reason {
188 OFPPR_ADD, /* The port was added */
189 OFPPR_DELETE, /* The port was removed */
190 OFPPR_MOD /* Some attribute of the port has changed */
193 /* A physical port has changed in the datapath */
194 struct ofp_port_status {
195 struct ofp_header header;
196 uint8_t reason; /* One of OFPPR_* */
197 uint8_t pad[3]; /* Align to 32-bits */
198 struct ofp_phy_port desc;
201 /* Modify behavior of the physical port */
202 struct ofp_port_mod {
203 struct ofp_header header;
204 struct ofp_phy_port desc;
207 /* Why is this packet being sent to the controller? */
209 OFPR_NO_MATCH, /* No matching flow. */
210 OFPR_ACTION /* Action explicitly output to controller. */
213 /* Packet received on port (datapath -> controller). */
214 struct ofp_packet_in {
215 struct ofp_header header;
216 uint32_t buffer_id; /* ID assigned by datapath. */
217 uint16_t total_len; /* Full length of frame. */
218 uint16_t in_port; /* Port on which frame was received. */
219 uint8_t reason; /* Reason packet is being sent (one of OFPR_*) */
221 uint8_t data[0]; /* Ethernet frame, halfway through 32-bit word,
222 so the IP header is 32-bit aligned. The
223 amount of data is inferred from the length
224 field in the header. Because of padding,
225 offsetof(struct ofp_packet_in, data) ==
226 sizeof(struct ofp_packet_in) - 2. */
229 enum ofp_action_type {
230 OFPAT_OUTPUT, /* Output to switch port. */
231 OFPAT_SET_DL_VLAN, /* VLAN. */
232 OFPAT_SET_DL_SRC, /* Ethernet source address. */
233 OFPAT_SET_DL_DST, /* Ethernet destination address. */
234 OFPAT_SET_NW_SRC, /* IP source address. */
235 OFPAT_SET_NW_DST, /* IP destination address. */
236 OFPAT_SET_TP_SRC, /* TCP/UDP source port. */
237 OFPAT_SET_TP_DST /* TCP/UDP destination port. */
240 /* An output action sends packets out 'port'. When the 'port' is the
241 * OFPP_CONTROLLER, 'max_len' indicates the max number of bytes to
242 * send. A 'max_len' of zero means the entire packet should be sent. */
243 struct ofp_action_output {
248 /* The VLAN id is 12-bits, so we'll use the entire 16 bits to indicate
249 * special conditions. All ones is used to indicate that no VLAN id was
250 * set, or if used as an action, that the VLAN header should be
253 #define OFP_VLAN_NONE 0xffff
256 uint16_t type; /* One of OFPAT_* */
258 struct ofp_action_output output; /* OFPAT_OUTPUT: output struct. */
259 uint16_t vlan_id; /* OFPAT_SET_DL_VLAN: VLAN id. */
260 uint8_t dl_addr[OFP_ETH_ALEN]; /* OFPAT_SET_DL_SRC/DST */
261 uint32_t nw_addr; /* OFPAT_SET_NW_SRC/DST */
262 uint16_t tp; /* OFPAT_SET_TP_SRC/DST */
266 /* Send packet (controller -> datapath). */
267 struct ofp_packet_out {
268 struct ofp_header header;
269 uint32_t buffer_id; /* ID assigned by datapath (-1 if none). */
270 uint16_t in_port; /* Packet's input port (OFPP_NONE if none). */
271 uint16_t out_port; /* Output port (if buffer_id == -1). */
273 struct ofp_action actions[0]; /* buffer_id != -1 */
274 uint8_t data[0]; /* buffer_id == -1 */
278 enum ofp_flow_mod_command {
279 OFPFC_ADD, /* New flow. */
280 OFPFC_DELETE, /* Delete all matching flows. */
281 OFPFC_DELETE_STRICT /* Strictly match wildcards and priority. */
284 /* Flow wildcards. */
285 enum ofp_flow_wildcards {
286 OFPFW_IN_PORT = 1 << 0, /* Switch input port. */
287 OFPFW_DL_VLAN = 1 << 1, /* VLAN. */
288 OFPFW_DL_SRC = 1 << 2, /* Ethernet source address. */
289 OFPFW_DL_DST = 1 << 3, /* Ethernet destination address. */
290 OFPFW_DL_TYPE = 1 << 4, /* Ethernet frame type. */
291 OFPFW_NW_SRC = 1 << 5, /* IP source address. */
292 OFPFW_NW_DST = 1 << 6, /* IP destination address. */
293 OFPFW_NW_PROTO = 1 << 7, /* IP protocol. */
294 OFPFW_TP_SRC = 1 << 8, /* TCP/UDP source port. */
295 OFPFW_TP_DST = 1 << 9, /* TCP/UDP destination port. */
296 OFPFW_ALL = (1 << 10) - 1
299 /* Values below this cutoff are 802.3 packets and the two bytes
300 * following MAC addresses are used as a frame length. Otherwise, the
301 * two bytes are used as the Ethernet type.
303 #define OFP_DL_TYPE_ETH2_CUTOFF 0x0600
305 /* Value of dl_type to indicate that the frame does not include an
308 #define OFP_DL_TYPE_NOT_ETH_TYPE 0x05ff
310 /* Fields to match against flows */
312 uint16_t wildcards; /* Wildcard fields. */
313 uint16_t in_port; /* Input switch port. */
314 uint8_t dl_src[OFP_ETH_ALEN]; /* Ethernet source address. */
315 uint8_t dl_dst[OFP_ETH_ALEN]; /* Ethernet destination address. */
316 uint16_t dl_vlan; /* Input VLAN. */
317 uint16_t dl_type; /* Ethernet frame type. */
318 uint32_t nw_src; /* IP source address. */
319 uint32_t nw_dst; /* IP destination address. */
320 uint8_t nw_proto; /* IP protocol. */
321 uint8_t pad[3]; /* Align to 32-bits. */
322 uint16_t tp_src; /* TCP/UDP source port. */
323 uint16_t tp_dst; /* TCP/UDP destination port. */
326 /* Value used in "max_idle" to indicate that the entry is permanent */
327 #define OFP_FLOW_PERMANENT 0
329 /* By default, choose a priority in the middle */
330 #define OFP_DEFAULT_PRIORITY 0x8000
332 /* Flow setup and teardown (controller -> datapath). */
333 struct ofp_flow_mod {
334 struct ofp_header header;
335 struct ofp_match match; /* Fields to match */
338 uint16_t command; /* One of OFPFC_*. */
339 uint16_t max_idle; /* Idle time before discarding (seconds). */
340 uint32_t buffer_id; /* Buffered packet to apply to (or -1). */
341 uint16_t priority; /* Priority level of flow entry. */
342 uint8_t pad[2]; /* Align to 32-bits. */
343 uint32_t reserved; /* Reserved for future use. */
344 struct ofp_action actions[0]; /* The number of actions is inferred from
345 the length field in the header. */
348 /* Flow expiration (datapath -> controller). */
349 struct ofp_flow_expired {
350 struct ofp_header header;
351 struct ofp_match match; /* Description of fields */
353 uint16_t priority; /* Priority level of flow entry. */
354 uint8_t pad[2]; /* Align to 32-bits. */
356 uint32_t duration; /* Time flow was alive in seconds. */
357 uint64_t packet_count;
361 /* Error message (datapath -> controller). */
362 struct ofp_error_msg {
363 struct ofp_header header;
367 uint8_t data[0]; /* Variable-length data. Interpreted based
368 on the type and code. */
371 enum ofp_stats_types {
373 * The request body is struct ofp_flow_stats_request.
374 * The reply body is an array of struct ofp_flow_stats. */
377 /* Flow table statistics.
378 * The request body is empty.
379 * The reply body is an array of struct ofp_table_stats. */
382 /* Physical port statistics.
383 * The request body is empty.
384 * The reply body is an array of struct ofp_port_stats. */
388 struct ofp_stats_request {
389 struct ofp_header header;
390 uint16_t type; /* One of the OFPST_* constants. */
391 uint16_t flags; /* OFPSF_REQ_* flags (none yet defined). */
392 uint8_t body[0]; /* Body of the request. */
395 enum ofp_stats_reply_flags {
396 OFPSF_REPLY_MORE = 1 << 0, /* More replies to follow */
399 struct ofp_stats_reply {
400 struct ofp_header header;
401 uint16_t type; /* One of the OFPST_* constants. */
402 uint16_t flags; /* OFPSF_REPLY_* flags. */
403 uint8_t body[0]; /* Body of the reply. */
406 enum ofp_stats_type {
407 OFPFS_INDIV, /* Send an entry for each matching flow */
408 OFPFS_AGGREGATE /* Aggregate matching flows */
411 /* Body for ofp_stats_request of type OFPST_FLOW. */
412 struct ofp_flow_stats_request {
413 struct ofp_match match; /* Fields to match */
414 uint8_t table_id; /* ID of table to read (from ofp_table_stats)
415 or 0xff for all tables. */
416 uint8_t type; /* One of OFPFS_ */
417 uint16_t pad; /* Align to 32-bits */
420 /* Body of reply to OFPST_FLOW request. */
421 struct ofp_flow_stats {
422 uint16_t length; /* Length of this entry */
423 uint8_t table_id; /* ID of table flow came from. 0nly used for
424 non-aggregated results */
426 struct ofp_match match; /* Description of fields */
427 uint32_t duration; /* Time flow has been alive in seconds. Only
428 used for non-aggregated results. */
429 uint64_t packet_count; /* Number of packets in flow. */
430 uint64_t byte_count; /* Number of bytes in flow. */
431 uint16_t priority; /* Priority of the entry. Only meaningful
432 when this is not an exact-match entry. */
433 uint16_t max_idle; /* Only used for non-aggregated results. */
434 struct ofp_action actions[0]; /* Only used for non-aggregated results. */
437 /* Body of reply to OFPST_TABLE request. */
438 struct ofp_table_stats {
440 uint8_t pad[3]; /* Align to 32-bits */
441 char name[OFP_MAX_TABLE_NAME_LEN];
442 uint32_t max_entries; /* Max number of entries supported */
443 uint32_t active_count; /* Number of active entries */
444 uint64_t matched_count; /* Number of packets that hit table */
447 /* Statistics about a particular port */
448 struct ofp_port_stats {
450 uint8_t pad[2]; /* Align to 32-bits */
451 uint64_t rx_count; /* Number of received packets */
452 uint64_t tx_count; /* Number of transmitted packets */
453 uint64_t drop_count; /* Number of packets dropped by interface */
456 #endif /* openflow.h */