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09246b99 | 1 | /* |
2d9b49dd | 2 | * Copyright (c) 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 Nicira, Inc. |
09246b99 BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | ||
19 | #include "nx-match.h" | |
20 | ||
685a51a5 JP |
21 | #include <netinet/icmp6.h> |
22 | ||
09246b99 | 23 | #include "classifier.h" |
b1c5bf1f | 24 | #include "colors.h" |
ee89ea7b | 25 | #include "openvswitch/hmap.h" |
b598f214 BW |
26 | #include "openflow/nicira-ext.h" |
27 | #include "openvswitch/dynamic-string.h" | |
064d7f84 | 28 | #include "openvswitch/meta-flow.h" |
b598f214 BW |
29 | #include "openvswitch/ofp-actions.h" |
30 | #include "openvswitch/ofp-errors.h" | |
f4248336 | 31 | #include "openvswitch/ofp-util.h" |
64c96779 | 32 | #include "openvswitch/ofpbuf.h" |
b598f214 | 33 | #include "openvswitch/vlog.h" |
09246b99 | 34 | #include "packets.h" |
ee89ea7b | 35 | #include "openvswitch/shash.h" |
9558d2a5 | 36 | #include "tun-metadata.h" |
09246b99 | 37 | #include "unaligned.h" |
ddc4f8e2 | 38 | #include "util.h" |
aafee638 | 39 | #include "vl-mff-map.h" |
09246b99 BP |
40 | |
41 | VLOG_DEFINE_THIS_MODULE(nx_match); | |
42 | ||
508a9338 BP |
43 | /* OXM headers. |
44 | * | |
45 | * | |
46 | * Standard OXM/NXM | |
47 | * ================ | |
48 | * | |
49 | * The header is 32 bits long. It looks like this: | |
50 | * | |
51 | * |31 16 15 9| 8 7 0 | |
52 | * +----------------------------------+---------------+--+------------------+ | |
53 | * | oxm_class | oxm_field |hm| oxm_length | | |
54 | * +----------------------------------+---------------+--+------------------+ | |
55 | * | |
56 | * where hm stands for oxm_hasmask. It is followed by oxm_length bytes of | |
57 | * payload. When oxm_hasmask is 0, the payload is the value of the field | |
58 | * identified by the header; when oxm_hasmask is 1, the payload is a value for | |
59 | * the field followed by a mask of equal length. | |
60 | * | |
61 | * Internally, we represent a standard OXM header as a 64-bit integer with the | |
62 | * above information in the most-significant bits. | |
63 | * | |
64 | * | |
65 | * Experimenter OXM | |
66 | * ================ | |
67 | * | |
68 | * The header is 64 bits long. It looks like the diagram above except that a | |
69 | * 32-bit experimenter ID, which we call oxm_vendor and which identifies a | |
70 | * vendor, is inserted just before the payload. Experimenter OXMs are | |
71 | * identified by an all-1-bits oxm_class (OFPXMC12_EXPERIMENTER). The | |
72 | * oxm_length value *includes* the experimenter ID, so that the real payload is | |
73 | * only oxm_length - 4 bytes long. | |
74 | * | |
75 | * Internally, we represent an experimenter OXM header as a 64-bit integer with | |
76 | * the standard header in the upper 32 bits and the experimenter ID in the | |
77 | * lower 32 bits. (It would be more convenient to swap the positions of the | |
78 | * two 32-bit words, but this would be more error-prone because experimenter | |
79 | * OXMs are very rarely used, so accidentally passing one through a 32-bit type | |
80 | * somewhere in the OVS code would be hard to find.) | |
81 | */ | |
82 | ||
178742f9 BP |
83 | /* |
84 | * OXM Class IDs. | |
85 | * The high order bit differentiate reserved classes from member classes. | |
86 | * Classes 0x0000 to 0x7FFF are member classes, allocated by ONF. | |
87 | * Classes 0x8000 to 0xFFFE are reserved classes, reserved for standardisation. | |
88 | */ | |
89 | enum ofp12_oxm_class { | |
90 | OFPXMC12_NXM_0 = 0x0000, /* Backward compatibility with NXM */ | |
91 | OFPXMC12_NXM_1 = 0x0001, /* Backward compatibility with NXM */ | |
92 | OFPXMC12_OPENFLOW_BASIC = 0x8000, /* Basic class for OpenFlow */ | |
93 | OFPXMC15_PACKET_REGS = 0x8001, /* Packet registers (pipeline fields). */ | |
94 | OFPXMC12_EXPERIMENTER = 0xffff, /* Experimenter class */ | |
95 | }; | |
96 | ||
508a9338 BP |
97 | /* Functions for extracting raw field values from OXM/NXM headers. */ |
98 | static uint32_t nxm_vendor(uint64_t header) { return header; } | |
99 | static int nxm_class(uint64_t header) { return header >> 48; } | |
100 | static int nxm_field(uint64_t header) { return (header >> 41) & 0x7f; } | |
101 | static bool nxm_hasmask(uint64_t header) { return (header >> 40) & 1; } | |
102 | static int nxm_length(uint64_t header) { return (header >> 32) & 0xff; } | |
899bb63d | 103 | static uint64_t nxm_no_len(uint64_t header) { return header & 0xffffff80ffffffffULL; } |
508a9338 BP |
104 | |
105 | static bool | |
106 | is_experimenter_oxm(uint64_t header) | |
107 | { | |
108 | return nxm_class(header) == OFPXMC12_EXPERIMENTER; | |
109 | } | |
110 | ||
111 | /* The OXM header "length" field is somewhat tricky: | |
112 | * | |
113 | * - For a standard OXM header, the length is the number of bytes of the | |
114 | * payload, and the payload consists of just the value (and mask, if | |
115 | * present). | |
116 | * | |
117 | * - For an experimenter OXM header, the length is the number of bytes in | |
118 | * the payload plus 4 (the length of the experimenter ID). That is, the | |
119 | * experimenter ID is included in oxm_length. | |
120 | * | |
121 | * This function returns the length of the experimenter ID field in 'header'. | |
122 | * That is, for an experimenter OXM (when an experimenter ID is present), it | |
123 | * returns 4, and for a standard OXM (when no experimenter ID is present), it | |
124 | * returns 0. */ | |
125 | static int | |
126 | nxm_experimenter_len(uint64_t header) | |
127 | { | |
128 | return is_experimenter_oxm(header) ? 4 : 0; | |
129 | } | |
130 | ||
131 | /* Returns the number of bytes that follow the header for an NXM/OXM entry | |
132 | * with the given 'header'. */ | |
133 | static int | |
134 | nxm_payload_len(uint64_t header) | |
135 | { | |
136 | return nxm_length(header) - nxm_experimenter_len(header); | |
137 | } | |
138 | ||
139 | /* Returns the number of bytes in the header for an NXM/OXM entry with the | |
140 | * given 'header'. */ | |
141 | static int | |
142 | nxm_header_len(uint64_t header) | |
143 | { | |
144 | return 4 + nxm_experimenter_len(header); | |
145 | } | |
178742f9 | 146 | |
508a9338 BP |
147 | #define NXM_HEADER(VENDOR, CLASS, FIELD, HASMASK, LENGTH) \ |
148 | (((uint64_t) (CLASS) << 48) | \ | |
149 | ((uint64_t) (FIELD) << 41) | \ | |
150 | ((uint64_t) (HASMASK) << 40) | \ | |
151 | ((uint64_t) (LENGTH) << 32) | \ | |
152 | (VENDOR)) | |
178742f9 | 153 | |
508a9338 BP |
154 | #define NXM_HEADER_FMT "%#"PRIx32":%d:%d:%d:%d" |
155 | #define NXM_HEADER_ARGS(HEADER) \ | |
156 | nxm_vendor(HEADER), nxm_class(HEADER), nxm_field(HEADER), \ | |
178742f9 BP |
157 | nxm_hasmask(HEADER), nxm_length(HEADER) |
158 | ||
159 | /* Functions for turning the "hasmask" bit on or off. (This also requires | |
160 | * adjusting the length.) */ | |
508a9338 BP |
161 | static uint64_t |
162 | nxm_make_exact_header(uint64_t header) | |
178742f9 | 163 | { |
508a9338 BP |
164 | int new_len = nxm_payload_len(header) / 2 + nxm_experimenter_len(header); |
165 | return NXM_HEADER(nxm_vendor(header), nxm_class(header), | |
166 | nxm_field(header), 0, new_len); | |
178742f9 | 167 | } |
508a9338 BP |
168 | static uint64_t |
169 | nxm_make_wild_header(uint64_t header) | |
178742f9 | 170 | { |
508a9338 BP |
171 | int new_len = nxm_payload_len(header) * 2 + nxm_experimenter_len(header); |
172 | return NXM_HEADER(nxm_vendor(header), nxm_class(header), | |
173 | nxm_field(header), 1, new_len); | |
178742f9 BP |
174 | } |
175 | ||
176 | /* Flow cookie. | |
177 | * | |
178 | * This may be used to gain the OpenFlow 1.1-like ability to restrict | |
179 | * certain NXM-based Flow Mod and Flow Stats Request messages to flows | |
180 | * with specific cookies. See the "nx_flow_mod" and "nx_flow_stats_request" | |
181 | * structure definitions for more details. This match is otherwise not | |
182 | * allowed. */ | |
508a9338 | 183 | #define NXM_NX_COOKIE NXM_HEADER (0, 0x0001, 30, 0, 8) |
178742f9 BP |
184 | #define NXM_NX_COOKIE_W nxm_make_wild_header(NXM_NX_COOKIE) |
185 | ||
186 | struct nxm_field { | |
508a9338 | 187 | uint64_t header; |
178742f9 BP |
188 | enum ofp_version version; |
189 | const char *name; /* e.g. "NXM_OF_IN_PORT". */ | |
190 | ||
191 | enum mf_field_id id; | |
192 | }; | |
193 | ||
508a9338 | 194 | static const struct nxm_field *nxm_field_by_header(uint64_t header); |
178742f9 | 195 | static const struct nxm_field *nxm_field_by_name(const char *name, size_t len); |
e6556fe3 BP |
196 | static const struct nxm_field *nxm_field_by_mf_id(enum mf_field_id, |
197 | enum ofp_version); | |
178742f9 | 198 | |
508a9338 | 199 | static void nx_put_header__(struct ofpbuf *, uint64_t header, bool masked); |
dc3eb953 JG |
200 | static void nx_put_header_len(struct ofpbuf *, enum mf_field_id field, |
201 | enum ofp_version version, bool masked, | |
202 | size_t n_bytes); | |
f8047558 | 203 | |
09246b99 BP |
204 | /* Rate limit for nx_match parse errors. These always indicate a bug in the |
205 | * peer and so there's not much point in showing a lot of them. */ | |
206 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
207 | ||
178742f9 BP |
208 | static const struct nxm_field * |
209 | mf_parse_subfield_name(const char *name, int name_len, bool *wild); | |
210 | ||
178742f9 BP |
211 | /* Returns the preferred OXM header to use for field 'id' in OpenFlow version |
212 | * 'version'. Specify 0 for 'version' if an NXM legacy header should be | |
213 | * preferred over any standardized OXM header. Returns 0 if field 'id' cannot | |
214 | * be expressed in NXM or OXM. */ | |
508a9338 | 215 | static uint64_t |
178742f9 BP |
216 | mf_oxm_header(enum mf_field_id id, enum ofp_version version) |
217 | { | |
e6556fe3 | 218 | const struct nxm_field *f = nxm_field_by_mf_id(id, version); |
178742f9 BP |
219 | return f ? f->header : 0; |
220 | } | |
221 | ||
508a9338 BP |
222 | /* Returns the 32-bit OXM or NXM header to use for field 'id', preferring an |
223 | * NXM legacy header over any standardized OXM header. Returns 0 if field 'id' | |
224 | * cannot be expressed with a 32-bit NXM or OXM header. | |
225 | * | |
226 | * Whenever possible, use nx_pull_header() instead of this function, because | |
227 | * this function cannot support 64-bit experimenter OXM headers. */ | |
228 | uint32_t | |
229 | mf_nxm_header(enum mf_field_id id) | |
230 | { | |
231 | uint64_t oxm = mf_oxm_header(id, 0); | |
232 | return is_experimenter_oxm(oxm) ? 0 : oxm >> 32; | |
233 | } | |
234 | ||
04f48a68 YHW |
235 | /* Returns the 32-bit OXM or NXM header to use for field 'mff'. If 'mff' is |
236 | * a mapped variable length mf_field, update the header with the configured | |
237 | * length of 'mff'. Returns 0 if 'mff' cannot be expressed with a 32-bit NXM | |
238 | * or OXM header.*/ | |
239 | uint32_t | |
240 | nxm_header_from_mff(const struct mf_field *mff) | |
241 | { | |
242 | uint64_t oxm = mf_oxm_header(mff->id, 0); | |
243 | ||
244 | if (mff->mapped) { | |
245 | oxm = nxm_no_len(oxm) | ((uint64_t) mff->n_bytes << 32); | |
246 | } | |
247 | ||
248 | return is_experimenter_oxm(oxm) ? 0 : oxm >> 32; | |
249 | } | |
250 | ||
508a9338 | 251 | static const struct mf_field * |
04f48a68 | 252 | mf_from_oxm_header(uint64_t header, const struct vl_mff_map *vl_mff_map) |
508a9338 BP |
253 | { |
254 | const struct nxm_field *f = nxm_field_by_header(header); | |
04f48a68 YHW |
255 | |
256 | if (f) { | |
257 | const struct mf_field *mff = mf_from_id(f->id); | |
258 | const struct mf_field *vl_mff = mf_get_vl_mff(mff, vl_mff_map); | |
259 | return vl_mff ? vl_mff : mff; | |
260 | } else { | |
261 | return NULL; | |
262 | } | |
508a9338 BP |
263 | } |
264 | ||
178742f9 BP |
265 | /* Returns the "struct mf_field" that corresponds to NXM or OXM header |
266 | * 'header', or NULL if 'header' doesn't correspond to any known field. */ | |
267 | const struct mf_field * | |
04f48a68 | 268 | mf_from_nxm_header(uint32_t header, const struct vl_mff_map *vl_mff_map) |
178742f9 | 269 | { |
04f48a68 | 270 | return mf_from_oxm_header((uint64_t) header << 32, vl_mff_map); |
178742f9 BP |
271 | } |
272 | ||
09246b99 BP |
273 | /* Returns the width of the data for a field with the given 'header', in |
274 | * bytes. */ | |
178742f9 | 275 | static int |
508a9338 | 276 | nxm_field_bytes(uint64_t header) |
09246b99 | 277 | { |
508a9338 | 278 | unsigned int length = nxm_payload_len(header); |
178742f9 | 279 | return nxm_hasmask(header) ? length / 2 : length; |
09246b99 | 280 | } |
e6556fe3 | 281 | \f |
6a885fd0 | 282 | /* nx_pull_match() and helpers. */ |
09246b99 | 283 | |
178742f9 BP |
284 | /* Given NXM/OXM value 'value' and mask 'mask' associated with 'header', checks |
285 | * for any 1-bit in the value where there is a 0-bit in the mask. Returns 0 if | |
286 | * none, otherwise an error code. */ | |
287 | static bool | |
508a9338 | 288 | is_mask_consistent(uint64_t header, const uint8_t *value, const uint8_t *mask) |
09246b99 | 289 | { |
178742f9 BP |
290 | unsigned int width = nxm_field_bytes(header); |
291 | unsigned int i; | |
09246b99 | 292 | |
178742f9 BP |
293 | for (i = 0; i < width; i++) { |
294 | if (value[i] & ~mask[i]) { | |
295 | if (!VLOG_DROP_WARN(&rl)) { | |
296 | VLOG_WARN_RL(&rl, "Rejecting NXM/OXM entry "NXM_HEADER_FMT " " | |
297 | "with 1-bits in value for bits wildcarded by the " | |
298 | "mask.", NXM_HEADER_ARGS(header)); | |
299 | } | |
300 | return false; | |
09246b99 | 301 | } |
09246b99 | 302 | } |
178742f9 BP |
303 | return true; |
304 | } | |
09246b99 | 305 | |
178742f9 | 306 | static bool |
508a9338 | 307 | is_cookie_pseudoheader(uint64_t header) |
178742f9 BP |
308 | { |
309 | return header == NXM_NX_COOKIE || header == NXM_NX_COOKIE_W; | |
310 | } | |
311 | ||
312 | static enum ofperr | |
04f48a68 YHW |
313 | nx_pull_header__(struct ofpbuf *b, bool allow_cookie, |
314 | const struct vl_mff_map *vl_mff_map, uint64_t *header, | |
178742f9 BP |
315 | const struct mf_field **field) |
316 | { | |
6fd6ed71 | 317 | if (b->size < 4) { |
508a9338 | 318 | goto bad_len; |
09246b99 | 319 | } |
508a9338 | 320 | |
6fd6ed71 | 321 | *header = ((uint64_t) ntohl(get_unaligned_be32(b->data))) << 32; |
508a9338 | 322 | if (is_experimenter_oxm(*header)) { |
6fd6ed71 | 323 | if (b->size < 8) { |
508a9338 BP |
324 | goto bad_len; |
325 | } | |
6fd6ed71 | 326 | *header = ntohll(get_unaligned_be64(b->data)); |
508a9338 | 327 | } |
1cb20095 | 328 | if (nxm_length(*header) < nxm_experimenter_len(*header)) { |
508a9338 BP |
329 | VLOG_WARN_RL(&rl, "OXM header "NXM_HEADER_FMT" has invalid length %d " |
330 | "(minimum is %d)", | |
331 | NXM_HEADER_ARGS(*header), nxm_length(*header), | |
1cb20095 | 332 | nxm_header_len(*header)); |
178742f9 BP |
333 | goto error; |
334 | } | |
508a9338 BP |
335 | ofpbuf_pull(b, nxm_header_len(*header)); |
336 | ||
178742f9 | 337 | if (field) { |
04f48a68 | 338 | *field = mf_from_oxm_header(*header, vl_mff_map); |
178742f9 BP |
339 | if (!*field && !(allow_cookie && is_cookie_pseudoheader(*header))) { |
340 | VLOG_DBG_RL(&rl, "OXM header "NXM_HEADER_FMT" is unknown", | |
341 | NXM_HEADER_ARGS(*header)); | |
342 | return OFPERR_OFPBMC_BAD_FIELD; | |
04f48a68 YHW |
343 | } else if (mf_vl_mff_invalid(*field, vl_mff_map)) { |
344 | return OFPERR_NXFMFC_INVALID_TLV_FIELD; | |
178742f9 | 345 | } |
09246b99 BP |
346 | } |
347 | ||
178742f9 BP |
348 | return 0; |
349 | ||
508a9338 BP |
350 | bad_len: |
351 | VLOG_DBG_RL(&rl, "encountered partial (%"PRIu32"-byte) OXM entry", | |
6fd6ed71 | 352 | b->size); |
178742f9 BP |
353 | error: |
354 | *header = 0; | |
38221f4e BP |
355 | if (field) { |
356 | *field = NULL; | |
357 | } | |
178742f9 | 358 | return OFPERR_OFPBMC_BAD_LEN; |
09246b99 BP |
359 | } |
360 | ||
11b8d049 JG |
361 | static void |
362 | copy_entry_value(const struct mf_field *field, union mf_value *value, | |
363 | const uint8_t *payload, int width) | |
364 | { | |
365 | int copy_len; | |
366 | void *copy_dst; | |
367 | ||
368 | copy_dst = value; | |
369 | copy_len = MIN(width, field ? field->n_bytes : sizeof *value); | |
370 | ||
371 | if (field && field->variable_len) { | |
372 | memset(value, 0, field->n_bytes); | |
373 | copy_dst = &value->u8 + field->n_bytes - copy_len; | |
374 | } | |
375 | ||
376 | memcpy(copy_dst, payload, copy_len); | |
377 | } | |
378 | ||
3947cc76 | 379 | static enum ofperr |
04f48a68 YHW |
380 | nx_pull_entry__(struct ofpbuf *b, bool allow_cookie, |
381 | const struct vl_mff_map *vl_mff_map, uint64_t *header, | |
11b8d049 | 382 | const struct mf_field **field_, |
178742f9 | 383 | union mf_value *value, union mf_value *mask) |
e1cfc4e4 | 384 | { |
11b8d049 | 385 | const struct mf_field *field; |
178742f9 BP |
386 | enum ofperr header_error; |
387 | unsigned int payload_len; | |
388 | const uint8_t *payload; | |
389 | int width; | |
e1cfc4e4 | 390 | |
04f48a68 YHW |
391 | header_error = nx_pull_header__(b, allow_cookie, vl_mff_map, header, |
392 | &field); | |
178742f9 BP |
393 | if (header_error && header_error != OFPERR_OFPBMC_BAD_FIELD) { |
394 | return header_error; | |
395 | } | |
396 | ||
508a9338 | 397 | payload_len = nxm_payload_len(*header); |
178742f9 BP |
398 | payload = ofpbuf_try_pull(b, payload_len); |
399 | if (!payload) { | |
400 | VLOG_DBG_RL(&rl, "OXM header "NXM_HEADER_FMT" calls for %u-byte " | |
401 | "payload but only %"PRIu32" bytes follow OXM header", | |
6fd6ed71 | 402 | NXM_HEADER_ARGS(*header), payload_len, b->size); |
178742f9 BP |
403 | return OFPERR_OFPBMC_BAD_LEN; |
404 | } | |
405 | ||
406 | width = nxm_field_bytes(*header); | |
407 | if (nxm_hasmask(*header) | |
408 | && !is_mask_consistent(*header, payload, payload + width)) { | |
409 | return OFPERR_OFPBMC_BAD_WILDCARDS; | |
410 | } | |
411 | ||
11b8d049 JG |
412 | copy_entry_value(field, value, payload, width); |
413 | ||
178742f9 BP |
414 | if (mask) { |
415 | if (nxm_hasmask(*header)) { | |
11b8d049 | 416 | copy_entry_value(field, mask, payload + width, width); |
178742f9 | 417 | } else { |
11b8d049 | 418 | memset(mask, 0xff, sizeof *mask); |
178742f9 BP |
419 | } |
420 | } else if (nxm_hasmask(*header)) { | |
421 | VLOG_DBG_RL(&rl, "OXM header "NXM_HEADER_FMT" includes mask but " | |
422 | "masked OXMs are not allowed here", | |
423 | NXM_HEADER_ARGS(*header)); | |
424 | return OFPERR_OFPBMC_BAD_MASK; | |
425 | } | |
426 | ||
11b8d049 JG |
427 | if (field_) { |
428 | *field_ = field; | |
429 | return header_error; | |
430 | } | |
431 | ||
432 | return 0; | |
178742f9 BP |
433 | } |
434 | ||
435 | /* Attempts to pull an NXM or OXM header, value, and mask (if present) from the | |
436 | * beginning of 'b'. If successful, stores a pointer to the "struct mf_field" | |
437 | * corresponding to the pulled header in '*field', the value into '*value', | |
438 | * and the mask into '*mask', and returns 0. On error, returns an OpenFlow | |
439 | * error; in this case, some bytes might have been pulled off 'b' anyhow, and | |
440 | * the output parameters might have been modified. | |
441 | * | |
442 | * If a NULL 'mask' is supplied, masked OXM or NXM entries are treated as | |
443 | * errors (with OFPERR_OFPBMC_BAD_MASK). | |
444 | */ | |
445 | enum ofperr | |
04f48a68 YHW |
446 | nx_pull_entry(struct ofpbuf *b, const struct vl_mff_map *vl_mff_map, |
447 | const struct mf_field **field, union mf_value *value, | |
448 | union mf_value *mask) | |
178742f9 | 449 | { |
508a9338 | 450 | uint64_t header; |
178742f9 | 451 | |
04f48a68 | 452 | return nx_pull_entry__(b, false, vl_mff_map, &header, field, value, mask); |
178742f9 BP |
453 | } |
454 | ||
455 | /* Attempts to pull an NXM or OXM header from the beginning of 'b'. If | |
456 | * successful, stores a pointer to the "struct mf_field" corresponding to the | |
457 | * pulled header in '*field', stores the header's hasmask bit in '*masked' | |
458 | * (true if hasmask=1, false if hasmask=0), and returns 0. On error, returns | |
459 | * an OpenFlow error; in this case, some bytes might have been pulled off 'b' | |
460 | * anyhow, and the output parameters might have been modified. | |
461 | * | |
462 | * If NULL 'masked' is supplied, masked OXM or NXM headers are treated as | |
463 | * errors (with OFPERR_OFPBMC_BAD_MASK). | |
464 | */ | |
465 | enum ofperr | |
04f48a68 YHW |
466 | nx_pull_header(struct ofpbuf *b, const struct vl_mff_map *vl_mff_map, |
467 | const struct mf_field **field, bool *masked) | |
178742f9 BP |
468 | { |
469 | enum ofperr error; | |
508a9338 | 470 | uint64_t header; |
178742f9 | 471 | |
04f48a68 | 472 | error = nx_pull_header__(b, false, vl_mff_map, &header, field); |
178742f9 BP |
473 | if (masked) { |
474 | *masked = !error && nxm_hasmask(header); | |
475 | } else if (!error && nxm_hasmask(header)) { | |
476 | error = OFPERR_OFPBMC_BAD_MASK; | |
477 | } | |
478 | return error; | |
479 | } | |
480 | ||
481 | static enum ofperr | |
482 | nx_pull_match_entry(struct ofpbuf *b, bool allow_cookie, | |
3cddeff0 | 483 | const struct vl_mff_map *vl_mff_map, |
178742f9 BP |
484 | const struct mf_field **field, |
485 | union mf_value *value, union mf_value *mask) | |
486 | { | |
487 | enum ofperr error; | |
508a9338 | 488 | uint64_t header; |
178742f9 | 489 | |
3cddeff0 | 490 | error = nx_pull_entry__(b, allow_cookie, vl_mff_map, &header, field, value, |
04f48a68 | 491 | mask); |
178742f9 BP |
492 | if (error) { |
493 | return error; | |
494 | } | |
495 | if (field && *field) { | |
496 | if (!mf_is_mask_valid(*field, mask)) { | |
497 | VLOG_DBG_RL(&rl, "bad mask for field %s", (*field)->name); | |
498 | return OFPERR_OFPBMC_BAD_MASK; | |
499 | } | |
500 | if (!mf_is_value_valid(*field, value)) { | |
501 | VLOG_DBG_RL(&rl, "bad value for field %s", (*field)->name); | |
502 | return OFPERR_OFPBMC_BAD_VALUE; | |
e1cfc4e4 BP |
503 | } |
504 | } | |
3947cc76 | 505 | return 0; |
e1cfc4e4 BP |
506 | } |
507 | ||
7befb20d JR |
508 | /* Prerequisites will only be checked when 'strict' is 'true'. This allows |
509 | * decoding conntrack original direction 5-tuple IP addresses without the | |
510 | * ethertype being present, when decoding metadata only. */ | |
90bf1e07 | 511 | static enum ofperr |
7623f4dd | 512 | nx_pull_raw(const uint8_t *p, unsigned int match_len, bool strict, |
d7892c81 YHW |
513 | bool pipeline_fields_only, struct match *match, ovs_be64 *cookie, |
514 | ovs_be64 *cookie_mask, const struct tun_table *tun_table, | |
3cddeff0 | 515 | const struct vl_mff_map *vl_mff_map) |
09246b99 | 516 | { |
cb22974d | 517 | ovs_assert((cookie != NULL) == (cookie_mask != NULL)); |
e729e793 | 518 | |
81a76618 | 519 | match_init_catchall(match); |
8d8ab6c2 | 520 | match->flow.tunnel.metadata.tab = tun_table; |
a3a0c29e BP |
521 | if (cookie) { |
522 | *cookie = *cookie_mask = htonll(0); | |
523 | } | |
a3a0c29e | 524 | |
0a2869d5 | 525 | struct ofpbuf b = ofpbuf_const_initializer(p, match_len); |
6fd6ed71 PS |
526 | while (b.size) { |
527 | const uint8_t *pos = b.data; | |
178742f9 BP |
528 | const struct mf_field *field; |
529 | union mf_value value; | |
530 | union mf_value mask; | |
90bf1e07 | 531 | enum ofperr error; |
09246b99 | 532 | |
3cddeff0 YHW |
533 | error = nx_pull_match_entry(&b, cookie != NULL, vl_mff_map, &field, |
534 | &value, &mask); | |
178742f9 BP |
535 | if (error) { |
536 | if (error == OFPERR_OFPBMC_BAD_FIELD && !strict) { | |
537 | continue; | |
538 | } | |
539 | } else if (!field) { | |
540 | if (!cookie) { | |
2e0525bc | 541 | error = OFPERR_OFPBMC_BAD_FIELD; |
178742f9 BP |
542 | } else if (*cookie_mask) { |
543 | error = OFPERR_OFPBMC_DUP_FIELD; | |
102ce766 | 544 | } else { |
178742f9 BP |
545 | *cookie = value.be64; |
546 | *cookie_mask = mask.be64; | |
102ce766 | 547 | } |
7befb20d | 548 | } else if (strict && !mf_are_match_prereqs_ok(field, match)) { |
2e0525bc | 549 | error = OFPERR_OFPBMC_BAD_PREREQ; |
178742f9 | 550 | } else if (!mf_is_all_wild(field, &match->wc)) { |
2e0525bc | 551 | error = OFPERR_OFPBMC_DUP_FIELD; |
d7892c81 YHW |
552 | } else if (pipeline_fields_only && !mf_is_pipeline_field(field)) { |
553 | error = OFPERR_OFPBRC_PIPELINE_FIELDS_ONLY; | |
72333065 | 554 | } else { |
4f7b100c JG |
555 | char *err_str; |
556 | ||
557 | mf_set(field, &value, &mask, match, &err_str); | |
558 | if (err_str) { | |
559 | VLOG_DBG_RL(&rl, "error parsing OXM at offset %"PRIdPTR" " | |
560 | "within match (%s)", pos - p, err_str); | |
561 | free(err_str); | |
562 | return OFPERR_OFPBMC_BAD_VALUE; | |
563 | } | |
3d4b2e6e JS |
564 | |
565 | match_add_ethernet_prereq(match, field); | |
e729e793 JP |
566 | } |
567 | ||
09246b99 | 568 | if (error) { |
178742f9 BP |
569 | VLOG_DBG_RL(&rl, "error parsing OXM at offset %"PRIdPTR" " |
570 | "within match (%s)", pos - | |
571 | p, ofperr_to_string(error)); | |
09246b99 BP |
572 | return error; |
573 | } | |
09246b99 BP |
574 | } |
575 | ||
8d8ab6c2 | 576 | match->flow.tunnel.metadata.tab = NULL; |
178742f9 | 577 | return 0; |
09246b99 | 578 | } |
102ce766 | 579 | |
7623f4dd SH |
580 | static enum ofperr |
581 | nx_pull_match__(struct ofpbuf *b, unsigned int match_len, bool strict, | |
d7892c81 | 582 | bool pipeline_fields_only, struct match *match, |
8d8ab6c2 | 583 | ovs_be64 *cookie, ovs_be64 *cookie_mask, |
3cddeff0 YHW |
584 | const struct tun_table *tun_table, |
585 | const struct vl_mff_map *vl_mff_map) | |
7623f4dd SH |
586 | { |
587 | uint8_t *p = NULL; | |
588 | ||
589 | if (match_len) { | |
590 | p = ofpbuf_try_pull(b, ROUND_UP(match_len, 8)); | |
591 | if (!p) { | |
592 | VLOG_DBG_RL(&rl, "nx_match length %u, rounded up to a " | |
593 | "multiple of 8, is longer than space in message (max " | |
6fd6ed71 | 594 | "length %"PRIu32")", match_len, b->size); |
7623f4dd SH |
595 | return OFPERR_OFPBMC_BAD_LEN; |
596 | } | |
597 | } | |
598 | ||
d7892c81 YHW |
599 | return nx_pull_raw(p, match_len, strict, pipeline_fields_only, match, |
600 | cookie, cookie_mask, tun_table, vl_mff_map); | |
7623f4dd SH |
601 | } |
602 | ||
102ce766 | 603 | /* Parses the nx_match formatted match description in 'b' with length |
81a76618 BP |
604 | * 'match_len'. Stores the results in 'match'. If 'cookie' and 'cookie_mask' |
605 | * are valid pointers, then stores the cookie and mask in them if 'b' contains | |
606 | * a "NXM_NX_COOKIE*" match. Otherwise, stores 0 in both. | |
d7892c81 YHW |
607 | * If 'pipeline_fields_only' is true, this function returns |
608 | * OFPERR_OFPBRC_PIPELINE_FIELDS_ONLY if there is any non pipeline fields | |
609 | * in 'b'. | |
102ce766 | 610 | * |
3cddeff0 YHW |
611 | * 'vl_mff_map" is an optional parameter that is used to validate the length |
612 | * of variable length mf_fields in 'match'. If it is not provided, the | |
613 | * default mf_fields with maximum length will be used. | |
614 | * | |
81a76618 | 615 | * Fails with an error upon encountering an unknown NXM header. |
102ce766 EJ |
616 | * |
617 | * Returns 0 if successful, otherwise an OpenFlow error code. */ | |
90bf1e07 | 618 | enum ofperr |
81a76618 | 619 | nx_pull_match(struct ofpbuf *b, unsigned int match_len, struct match *match, |
8d8ab6c2 | 620 | ovs_be64 *cookie, ovs_be64 *cookie_mask, |
d7892c81 | 621 | bool pipeline_fields_only, const struct tun_table *tun_table, |
3cddeff0 | 622 | const struct vl_mff_map *vl_mff_map) |
102ce766 | 623 | { |
d7892c81 YHW |
624 | return nx_pull_match__(b, match_len, true, pipeline_fields_only, match, |
625 | cookie, cookie_mask, tun_table, vl_mff_map); | |
102ce766 EJ |
626 | } |
627 | ||
81a76618 | 628 | /* Behaves the same as nx_pull_match(), but skips over unknown NXM headers, |
7befb20d | 629 | * instead of failing with an error, and does not check for field |
5bcd4754 | 630 | * prerequisites. */ |
90bf1e07 | 631 | enum ofperr |
102ce766 | 632 | nx_pull_match_loose(struct ofpbuf *b, unsigned int match_len, |
d7892c81 YHW |
633 | struct match *match, ovs_be64 *cookie, |
634 | ovs_be64 *cookie_mask, bool pipeline_fields_only, | |
8d8ab6c2 | 635 | const struct tun_table *tun_table) |
102ce766 | 636 | { |
d7892c81 YHW |
637 | return nx_pull_match__(b, match_len, false, pipeline_fields_only, match, |
638 | cookie, cookie_mask, tun_table, NULL); | |
102ce766 | 639 | } |
7623f4dd SH |
640 | |
641 | static enum ofperr | |
d7892c81 | 642 | oxm_pull_match__(struct ofpbuf *b, bool strict, bool pipeline_fields_only, |
3cddeff0 YHW |
643 | const struct tun_table *tun_table, |
644 | const struct vl_mff_map *vl_mff_map, struct match *match) | |
7623f4dd | 645 | { |
6fd6ed71 | 646 | struct ofp11_match_header *omh = b->data; |
7623f4dd SH |
647 | uint8_t *p; |
648 | uint16_t match_len; | |
649 | ||
6fd6ed71 | 650 | if (b->size < sizeof *omh) { |
7623f4dd SH |
651 | return OFPERR_OFPBMC_BAD_LEN; |
652 | } | |
653 | ||
654 | match_len = ntohs(omh->length); | |
655 | if (match_len < sizeof *omh) { | |
656 | return OFPERR_OFPBMC_BAD_LEN; | |
657 | } | |
658 | ||
659 | if (omh->type != htons(OFPMT_OXM)) { | |
660 | return OFPERR_OFPBMC_BAD_TYPE; | |
661 | } | |
662 | ||
663 | p = ofpbuf_try_pull(b, ROUND_UP(match_len, 8)); | |
664 | if (!p) { | |
665 | VLOG_DBG_RL(&rl, "oxm length %u, rounded up to a " | |
666 | "multiple of 8, is longer than space in message (max " | |
6fd6ed71 | 667 | "length %"PRIu32")", match_len, b->size); |
7623f4dd SH |
668 | return OFPERR_OFPBMC_BAD_LEN; |
669 | } | |
670 | ||
671 | return nx_pull_raw(p + sizeof *omh, match_len - sizeof *omh, | |
d7892c81 YHW |
672 | strict, pipeline_fields_only, match, NULL, NULL, |
673 | tun_table, vl_mff_map); | |
7623f4dd SH |
674 | } |
675 | ||
aa0667bc YT |
676 | /* Parses the oxm formatted match description preceded by a struct |
677 | * ofp11_match_header in 'b'. Stores the result in 'match'. | |
d7892c81 YHW |
678 | * If 'pipeline_fields_only' is true, this function returns |
679 | * OFPERR_OFPBRC_PIPELINE_FIELDS_ONLY if there is any non pipeline fields | |
680 | * in 'b'. | |
7623f4dd | 681 | * |
3cddeff0 YHW |
682 | * 'vl_mff_map' is an optional parameter that is used to validate the length |
683 | * of variable length mf_fields in 'match'. If it is not provided, the | |
684 | * default mf_fields with maximum length will be used. | |
685 | * | |
7623f4dd SH |
686 | * Fails with an error when encountering unknown OXM headers. |
687 | * | |
688 | * Returns 0 if successful, otherwise an OpenFlow error code. */ | |
689 | enum ofperr | |
d7892c81 YHW |
690 | oxm_pull_match(struct ofpbuf *b, bool pipeline_fields_only, |
691 | const struct tun_table *tun_table, | |
3cddeff0 | 692 | const struct vl_mff_map *vl_mff_map, struct match *match) |
7623f4dd | 693 | { |
d7892c81 YHW |
694 | return oxm_pull_match__(b, true, pipeline_fields_only, tun_table, |
695 | vl_mff_map, match); | |
7623f4dd SH |
696 | } |
697 | ||
7befb20d JR |
698 | /* Behaves the same as oxm_pull_match() with two exceptions. Skips over |
699 | * unknown OXM headers instead of failing with an error when they are | |
5bcd4754 | 700 | * encountered, and does not check for field prerequisites. */ |
7623f4dd | 701 | enum ofperr |
d7892c81 YHW |
702 | oxm_pull_match_loose(struct ofpbuf *b, bool pipeline_fields_only, |
703 | const struct tun_table *tun_table, struct match *match) | |
7623f4dd | 704 | { |
d7892c81 YHW |
705 | return oxm_pull_match__(b, false, pipeline_fields_only, tun_table, NULL, |
706 | match); | |
7623f4dd | 707 | } |
bc65c25a | 708 | |
9f6e20b7 BP |
709 | /* Parses the OXM match description in the 'oxm_len' bytes in 'oxm'. Stores |
710 | * the result in 'match'. | |
711 | * | |
7befb20d | 712 | * Returns 0 if successful, otherwise an OpenFlow error code. |
9f6e20b7 | 713 | * |
87450a4e YHW |
714 | * If 'loose' is true, encountering unknown OXM headers or missing field |
715 | * prerequisites are not considered as error conditions. | |
7befb20d | 716 | */ |
9f6e20b7 | 717 | enum ofperr |
87450a4e | 718 | oxm_decode_match(const void *oxm, size_t oxm_len, bool loose, |
3cddeff0 YHW |
719 | const struct tun_table *tun_table, |
720 | const struct vl_mff_map *vl_mff_map, struct match *match) | |
9f6e20b7 | 721 | { |
d7892c81 YHW |
722 | return nx_pull_raw(oxm, oxm_len, !loose, false, match, NULL, NULL, |
723 | tun_table, vl_mff_map); | |
9f6e20b7 BP |
724 | } |
725 | ||
bc65c25a SH |
726 | /* Verify an array of OXM TLVs treating value of each TLV as a mask, |
727 | * disallowing masks in each TLV and ignoring pre-requisites. */ | |
728 | enum ofperr | |
729 | oxm_pull_field_array(const void *fields_data, size_t fields_len, | |
730 | struct field_array *fa) | |
731 | { | |
0a2869d5 | 732 | struct ofpbuf b = ofpbuf_const_initializer(fields_data, fields_len); |
bc65c25a SH |
733 | while (b.size) { |
734 | const uint8_t *pos = b.data; | |
735 | const struct mf_field *field; | |
736 | union mf_value value; | |
737 | enum ofperr error; | |
738 | uint64_t header; | |
739 | ||
04f48a68 YHW |
740 | error = nx_pull_entry__(&b, false, NULL, &header, &field, &value, |
741 | NULL); | |
bc65c25a SH |
742 | if (error) { |
743 | VLOG_DBG_RL(&rl, "error pulling field array field"); | |
744 | return error; | |
745 | } else if (!field) { | |
746 | VLOG_DBG_RL(&rl, "unknown field array field"); | |
747 | error = OFPERR_OFPBMC_BAD_FIELD; | |
748 | } else if (bitmap_is_set(fa->used.bm, field->id)) { | |
749 | VLOG_DBG_RL(&rl, "duplicate field array field '%s'", field->name); | |
750 | error = OFPERR_OFPBMC_DUP_FIELD; | |
751 | } else if (!mf_is_mask_valid(field, &value)) { | |
752 | VLOG_DBG_RL(&rl, "bad mask in field array field '%s'", field->name); | |
753 | return OFPERR_OFPBMC_BAD_MASK; | |
754 | } else { | |
755 | field_array_set(field->id, &value, fa); | |
756 | } | |
757 | ||
758 | if (error) { | |
759 | const uint8_t *start = fields_data; | |
760 | ||
761 | VLOG_DBG_RL(&rl, "error parsing OXM at offset %"PRIdPTR" " | |
762 | "within field array (%s)", pos - start, | |
763 | ofperr_to_string(error)); | |
764 | return error; | |
765 | } | |
766 | } | |
767 | ||
768 | return 0; | |
769 | } | |
09246b99 BP |
770 | \f |
771 | /* nx_put_match() and helpers. | |
772 | * | |
773 | * 'put' functions whose names end in 'w' add a wildcarded field. | |
774 | * 'put' functions whose names end in 'm' add a field that might be wildcarded. | |
775 | * Other 'put' functions add exact-match fields. | |
776 | */ | |
be7ac2f3 BP |
777 | |
778 | struct nxm_put_ctx { | |
779 | struct ofpbuf *output; | |
3d4b2e6e | 780 | bool implied_ethernet; |
be7ac2f3 BP |
781 | }; |
782 | ||
1cb20095 | 783 | void |
be7ac2f3 BP |
784 | nxm_put_entry_raw(struct ofpbuf *b, |
785 | enum mf_field_id field, enum ofp_version version, | |
786 | const void *value, const void *mask, size_t n_bytes) | |
09246b99 | 787 | { |
1cb20095 | 788 | nx_put_header_len(b, field, version, !!mask, n_bytes); |
f8047558 | 789 | ofpbuf_put(b, value, n_bytes); |
1cb20095 JG |
790 | if (mask) { |
791 | ofpbuf_put(b, mask, n_bytes); | |
792 | } | |
be7ac2f3 | 793 | } |
1cb20095 | 794 | |
be7ac2f3 BP |
795 | static void |
796 | nxm_put__(struct nxm_put_ctx *ctx, | |
797 | enum mf_field_id field, enum ofp_version version, | |
798 | const void *value, const void *mask, size_t n_bytes) | |
799 | { | |
800 | nxm_put_entry_raw(ctx->output, field, version, value, mask, n_bytes); | |
3d4b2e6e JS |
801 | if (!ctx->implied_ethernet && mf_from_id(field)->prereqs != MFP_NONE) { |
802 | ctx->implied_ethernet = true; | |
803 | } | |
09246b99 BP |
804 | } |
805 | ||
1cb20095 | 806 | static void |
be7ac2f3 BP |
807 | nxm_put(struct nxm_put_ctx *ctx, |
808 | enum mf_field_id field, enum ofp_version version, | |
f8047558 | 809 | const void *value, const void *mask, size_t n_bytes) |
66642cb4 | 810 | { |
f8047558 BP |
811 | if (!is_all_zeros(mask, n_bytes)) { |
812 | bool masked = !is_all_ones(mask, n_bytes); | |
be7ac2f3 | 813 | nxm_put__(ctx, field, version, value, masked ? mask : NULL, n_bytes); |
66642cb4 BP |
814 | } |
815 | } | |
816 | ||
09246b99 | 817 | static void |
be7ac2f3 BP |
818 | nxm_put_8m(struct nxm_put_ctx *ctx, |
819 | enum mf_field_id field, enum ofp_version version, | |
f8047558 | 820 | uint8_t value, uint8_t mask) |
09246b99 | 821 | { |
be7ac2f3 | 822 | nxm_put(ctx, field, version, &value, &mask, sizeof value); |
09246b99 BP |
823 | } |
824 | ||
825 | static void | |
be7ac2f3 BP |
826 | nxm_put_8(struct nxm_put_ctx *ctx, |
827 | enum mf_field_id field, enum ofp_version version, uint8_t value) | |
09246b99 | 828 | { |
be7ac2f3 | 829 | nxm_put__(ctx, field, version, &value, NULL, sizeof value); |
09246b99 BP |
830 | } |
831 | ||
832 | static void | |
be7ac2f3 BP |
833 | nxm_put_16m(struct nxm_put_ctx *ctx, |
834 | enum mf_field_id field, enum ofp_version version, | |
f8047558 | 835 | ovs_be16 value, ovs_be16 mask) |
09246b99 | 836 | { |
be7ac2f3 | 837 | nxm_put(ctx, field, version, &value, &mask, sizeof value); |
09246b99 BP |
838 | } |
839 | ||
840 | static void | |
be7ac2f3 BP |
841 | nxm_put_16(struct nxm_put_ctx *ctx, |
842 | enum mf_field_id field, enum ofp_version version, ovs_be16 value) | |
09246b99 | 843 | { |
be7ac2f3 | 844 | nxm_put__(ctx, field, version, &value, NULL, sizeof value); |
09246b99 BP |
845 | } |
846 | ||
8368c090 | 847 | static void |
be7ac2f3 BP |
848 | nxm_put_32m(struct nxm_put_ctx *ctx, |
849 | enum mf_field_id field, enum ofp_version version, | |
f8047558 | 850 | ovs_be32 value, ovs_be32 mask) |
8368c090 | 851 | { |
be7ac2f3 | 852 | nxm_put(ctx, field, version, &value, &mask, sizeof value); |
8368c090 BP |
853 | } |
854 | ||
855 | static void | |
be7ac2f3 BP |
856 | nxm_put_32(struct nxm_put_ctx *ctx, |
857 | enum mf_field_id field, enum ofp_version version, ovs_be32 value) | |
8368c090 | 858 | { |
be7ac2f3 | 859 | nxm_put__(ctx, field, version, &value, NULL, sizeof value); |
8368c090 BP |
860 | } |
861 | ||
09246b99 | 862 | static void |
be7ac2f3 BP |
863 | nxm_put_64m(struct nxm_put_ctx *ctx, |
864 | enum mf_field_id field, enum ofp_version version, | |
f8047558 | 865 | ovs_be64 value, ovs_be64 mask) |
09246b99 | 866 | { |
be7ac2f3 | 867 | nxm_put(ctx, field, version, &value, &mask, sizeof value); |
09246b99 BP |
868 | } |
869 | ||
8ff10dd5 | 870 | static void |
be7ac2f3 | 871 | nxm_put_128m(struct nxm_put_ctx *ctx, |
8ff10dd5 JP |
872 | enum mf_field_id field, enum ofp_version version, |
873 | const ovs_be128 value, const ovs_be128 mask) | |
874 | { | |
be7ac2f3 | 875 | nxm_put(ctx, field, version, &value, &mask, sizeof(value)); |
8ff10dd5 JP |
876 | } |
877 | ||
1e37a2d7 | 878 | static void |
be7ac2f3 | 879 | nxm_put_eth_masked(struct nxm_put_ctx *ctx, |
f8047558 | 880 | enum mf_field_id field, enum ofp_version version, |
74ff3298 | 881 | const struct eth_addr value, const struct eth_addr mask) |
1e37a2d7 | 882 | { |
be7ac2f3 | 883 | nxm_put(ctx, field, version, value.ea, mask.ea, ETH_ADDR_LEN); |
1e37a2d7 BP |
884 | } |
885 | ||
d31f1109 | 886 | static void |
be7ac2f3 | 887 | nxm_put_ipv6(struct nxm_put_ctx *ctx, |
f8047558 | 888 | enum mf_field_id field, enum ofp_version version, |
d31f1109 JP |
889 | const struct in6_addr *value, const struct in6_addr *mask) |
890 | { | |
be7ac2f3 | 891 | nxm_put(ctx, field, version, value->s6_addr, mask->s6_addr, |
f8047558 | 892 | sizeof value->s6_addr); |
d31f1109 JP |
893 | } |
894 | ||
7257b535 | 895 | static void |
be7ac2f3 | 896 | nxm_put_frag(struct nxm_put_ctx *ctx, const struct match *match, |
f8047558 | 897 | enum ofp_version version) |
7257b535 | 898 | { |
f8047558 BP |
899 | uint8_t nw_frag = match->flow.nw_frag & FLOW_NW_FRAG_MASK; |
900 | uint8_t nw_frag_mask = match->wc.masks.nw_frag & FLOW_NW_FRAG_MASK; | |
7257b535 | 901 | |
be7ac2f3 | 902 | nxm_put_8m(ctx, MFF_IP_FRAG, version, nw_frag, |
f8047558 | 903 | nw_frag_mask == FLOW_NW_FRAG_MASK ? UINT8_MAX : nw_frag_mask); |
7257b535 BP |
904 | } |
905 | ||
5e10215d BP |
906 | /* Appends to 'b' a set of OXM or NXM matches for the IPv4 or IPv6 fields in |
907 | * 'match'. */ | |
8e7082b0 | 908 | static void |
be7ac2f3 BP |
909 | nxm_put_ip(struct nxm_put_ctx *ctx, |
910 | const struct match *match, enum ofp_version oxm) | |
8e7082b0 | 911 | { |
81a76618 | 912 | const struct flow *flow = &match->flow; |
3d4b2e6e | 913 | ovs_be16 dl_type = get_dl_type(flow); |
8e7082b0 | 914 | |
3d4b2e6e | 915 | if (dl_type == htons(ETH_TYPE_IP)) { |
be7ac2f3 | 916 | nxm_put_32m(ctx, MFF_IPV4_SRC, oxm, |
5e10215d | 917 | flow->nw_src, match->wc.masks.nw_src); |
be7ac2f3 | 918 | nxm_put_32m(ctx, MFF_IPV4_DST, oxm, |
5e10215d BP |
919 | flow->nw_dst, match->wc.masks.nw_dst); |
920 | } else { | |
be7ac2f3 | 921 | nxm_put_ipv6(ctx, MFF_IPV6_SRC, oxm, |
5e10215d | 922 | &flow->ipv6_src, &match->wc.masks.ipv6_src); |
be7ac2f3 | 923 | nxm_put_ipv6(ctx, MFF_IPV6_DST, oxm, |
5e10215d BP |
924 | &flow->ipv6_dst, &match->wc.masks.ipv6_dst); |
925 | } | |
926 | ||
be7ac2f3 | 927 | nxm_put_frag(ctx, match, oxm); |
8e7082b0 | 928 | |
81a76618 | 929 | if (match->wc.masks.nw_tos & IP_DSCP_MASK) { |
1638b906 | 930 | if (oxm) { |
be7ac2f3 | 931 | nxm_put_8(ctx, MFF_IP_DSCP_SHIFTED, oxm, |
9d84066c | 932 | flow->nw_tos >> 2); |
1638b906 | 933 | } else { |
be7ac2f3 | 934 | nxm_put_8(ctx, MFF_IP_DSCP, oxm, |
9d84066c | 935 | flow->nw_tos & IP_DSCP_MASK); |
1638b906 | 936 | } |
8e7082b0 BP |
937 | } |
938 | ||
81a76618 | 939 | if (match->wc.masks.nw_tos & IP_ECN_MASK) { |
be7ac2f3 | 940 | nxm_put_8(ctx, MFF_IP_ECN, oxm, |
b5ae8913 | 941 | flow->nw_tos & IP_ECN_MASK); |
8e7082b0 BP |
942 | } |
943 | ||
5a21d9c2 | 944 | if (match->wc.masks.nw_ttl) { |
be7ac2f3 | 945 | nxm_put_8(ctx, MFF_IP_TTL, oxm, flow->nw_ttl); |
8e7082b0 BP |
946 | } |
947 | ||
be7ac2f3 | 948 | nxm_put_32m(ctx, MFF_IPV6_LABEL, oxm, |
5e10215d BP |
949 | flow->ipv6_label, match->wc.masks.ipv6_label); |
950 | ||
81a76618 | 951 | if (match->wc.masks.nw_proto) { |
be7ac2f3 | 952 | nxm_put_8(ctx, MFF_IP_PROTO, oxm, flow->nw_proto); |
8e7082b0 BP |
953 | |
954 | if (flow->nw_proto == IPPROTO_TCP) { | |
be7ac2f3 | 955 | nxm_put_16m(ctx, MFF_TCP_SRC, oxm, |
81a76618 | 956 | flow->tp_src, match->wc.masks.tp_src); |
be7ac2f3 | 957 | nxm_put_16m(ctx, MFF_TCP_DST, oxm, |
81a76618 | 958 | flow->tp_dst, match->wc.masks.tp_dst); |
be7ac2f3 | 959 | nxm_put_16m(ctx, MFF_TCP_FLAGS, oxm, |
dc235f7f | 960 | flow->tcp_flags, match->wc.masks.tcp_flags); |
8e7082b0 | 961 | } else if (flow->nw_proto == IPPROTO_UDP) { |
be7ac2f3 | 962 | nxm_put_16m(ctx, MFF_UDP_SRC, oxm, |
81a76618 | 963 | flow->tp_src, match->wc.masks.tp_src); |
be7ac2f3 | 964 | nxm_put_16m(ctx, MFF_UDP_DST, oxm, |
81a76618 | 965 | flow->tp_dst, match->wc.masks.tp_dst); |
0d56eaf2 | 966 | } else if (flow->nw_proto == IPPROTO_SCTP) { |
be7ac2f3 | 967 | nxm_put_16m(ctx, MFF_SCTP_SRC, oxm, flow->tp_src, |
0d56eaf2 | 968 | match->wc.masks.tp_src); |
be7ac2f3 | 969 | nxm_put_16m(ctx, MFF_SCTP_DST, oxm, flow->tp_dst, |
0d56eaf2 | 970 | match->wc.masks.tp_dst); |
a75636c8 | 971 | } else if (is_icmpv4(flow, NULL)) { |
5e10215d | 972 | if (match->wc.masks.tp_src) { |
be7ac2f3 | 973 | nxm_put_8(ctx, MFF_ICMPV4_TYPE, oxm, |
5e10215d BP |
974 | ntohs(flow->tp_src)); |
975 | } | |
976 | if (match->wc.masks.tp_dst) { | |
be7ac2f3 | 977 | nxm_put_8(ctx, MFF_ICMPV4_CODE, oxm, |
5e10215d BP |
978 | ntohs(flow->tp_dst)); |
979 | } | |
a75636c8 | 980 | } else if (is_icmpv6(flow, NULL)) { |
81a76618 | 981 | if (match->wc.masks.tp_src) { |
be7ac2f3 | 982 | nxm_put_8(ctx, MFF_ICMPV6_TYPE, oxm, |
5e10215d | 983 | ntohs(flow->tp_src)); |
8e7082b0 | 984 | } |
81a76618 | 985 | if (match->wc.masks.tp_dst) { |
be7ac2f3 | 986 | nxm_put_8(ctx, MFF_ICMPV6_CODE, oxm, |
5e10215d BP |
987 | ntohs(flow->tp_dst)); |
988 | } | |
c17fcc0a | 989 | if (is_nd(flow, NULL)) { |
be7ac2f3 | 990 | nxm_put_ipv6(ctx, MFF_ND_TARGET, oxm, |
5e10215d BP |
991 | &flow->nd_target, &match->wc.masks.nd_target); |
992 | if (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT)) { | |
be7ac2f3 | 993 | nxm_put_eth_masked(ctx, MFF_ND_SLL, oxm, |
5e10215d BP |
994 | flow->arp_sha, match->wc.masks.arp_sha); |
995 | } | |
996 | if (flow->tp_src == htons(ND_NEIGHBOR_ADVERT)) { | |
be7ac2f3 | 997 | nxm_put_eth_masked(ctx, MFF_ND_TLL, oxm, |
5e10215d BP |
998 | flow->arp_tha, match->wc.masks.arp_tha); |
999 | } | |
8e7082b0 BP |
1000 | } |
1001 | } | |
1002 | } | |
1003 | } | |
1004 | ||
81a76618 | 1005 | /* Appends to 'b' the nx_match format that expresses 'match'. For Flow Mod and |
7623f4dd SH |
1006 | * Flow Stats Requests messages, a 'cookie' and 'cookie_mask' may be supplied. |
1007 | * Otherwise, 'cookie_mask' should be zero. | |
4d0ed519 | 1008 | * |
9d84066c BP |
1009 | * Specify 'oxm' as 0 to express the match in NXM format; otherwise, specify |
1010 | * 'oxm' as the OpenFlow version number for the OXM format to use. | |
1011 | * | |
4d0ed519 BP |
1012 | * This function can cause 'b''s data to be reallocated. |
1013 | * | |
1014 | * Returns the number of bytes appended to 'b', excluding padding. | |
1015 | * | |
81a76618 | 1016 | * If 'match' is a catch-all rule that matches every packet, then this function |
4d0ed519 | 1017 | * appends nothing to 'b' and returns 0. */ |
7623f4dd | 1018 | static int |
9d84066c | 1019 | nx_put_raw(struct ofpbuf *b, enum ofp_version oxm, const struct match *match, |
7623f4dd | 1020 | ovs_be64 cookie, ovs_be64 cookie_mask) |
09246b99 | 1021 | { |
81a76618 | 1022 | const struct flow *flow = &match->flow; |
6fd6ed71 | 1023 | const size_t start_len = b->size; |
3d4b2e6e | 1024 | ovs_be16 dl_type = get_dl_type(flow); |
09246b99 | 1025 | int match_len; |
b6c9e612 | 1026 | int i; |
09246b99 | 1027 | |
2482b0b0 | 1028 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 39); |
a877206f | 1029 | |
3d4b2e6e JS |
1030 | struct nxm_put_ctx ctx = { .output = b, .implied_ethernet = false }; |
1031 | ||
1032 | /* OpenFlow Packet Type. Must be first. */ | |
1033 | if (match->wc.masks.packet_type && !match_has_default_packet_type(match)) { | |
1034 | nxm_put_32m(&ctx, MFF_PACKET_TYPE, oxm, flow->packet_type, | |
1035 | match->wc.masks.packet_type); | |
1036 | } | |
be7ac2f3 | 1037 | |
09246b99 | 1038 | /* Metadata. */ |
a79f29f2 | 1039 | if (match->wc.masks.dp_hash) { |
be7ac2f3 | 1040 | nxm_put_32m(&ctx, MFF_DP_HASH, oxm, |
447b6582 | 1041 | htonl(flow->dp_hash), htonl(match->wc.masks.dp_hash)); |
a79f29f2 AZ |
1042 | } |
1043 | ||
1044 | if (match->wc.masks.recirc_id) { | |
be7ac2f3 | 1045 | nxm_put_32(&ctx, MFF_RECIRC_ID, oxm, htonl(flow->recirc_id)); |
a79f29f2 AZ |
1046 | } |
1047 | ||
18080541 | 1048 | if (match->wc.masks.conj_id) { |
be7ac2f3 | 1049 | nxm_put_32(&ctx, MFF_CONJ_ID, oxm, htonl(flow->conj_id)); |
18080541 BP |
1050 | } |
1051 | ||
4e022ec0 AW |
1052 | if (match->wc.masks.in_port.ofp_port) { |
1053 | ofp_port_t in_port = flow->in_port.ofp_port; | |
b5ae8913 | 1054 | if (oxm) { |
be7ac2f3 | 1055 | nxm_put_32(&ctx, MFF_IN_PORT_OXM, oxm, |
9d84066c | 1056 | ofputil_port_to_ofp11(in_port)); |
b5ae8913 | 1057 | } else { |
be7ac2f3 | 1058 | nxm_put_16(&ctx, MFF_IN_PORT, oxm, |
9d84066c | 1059 | htons(ofp_to_u16(in_port))); |
b5ae8913 | 1060 | } |
09246b99 | 1061 | } |
c61f3870 | 1062 | if (match->wc.masks.actset_output) { |
be7ac2f3 | 1063 | nxm_put_32(&ctx, MFF_ACTSET_OUTPUT, oxm, |
c61f3870 BP |
1064 | ofputil_port_to_ofp11(flow->actset_output)); |
1065 | } | |
09246b99 BP |
1066 | |
1067 | /* Ethernet. */ | |
be7ac2f3 | 1068 | nxm_put_eth_masked(&ctx, MFF_ETH_SRC, oxm, |
81a76618 | 1069 | flow->dl_src, match->wc.masks.dl_src); |
be7ac2f3 | 1070 | nxm_put_eth_masked(&ctx, MFF_ETH_DST, oxm, |
81a76618 | 1071 | flow->dl_dst, match->wc.masks.dl_dst); |
be7ac2f3 | 1072 | nxm_put_16m(&ctx, MFF_ETH_TYPE, oxm, |
e2170cff | 1073 | ofputil_dl_type_to_openflow(flow->dl_type), |
81a76618 | 1074 | match->wc.masks.dl_type); |
09246b99 | 1075 | |
95f61ba8 SH |
1076 | /* 802.1Q. */ |
1077 | if (oxm) { | |
26720e24 | 1078 | ovs_be16 VID_CFI_MASK = htons(VLAN_VID_MASK | VLAN_CFI); |
f0fb825a EG |
1079 | ovs_be16 vid = flow->vlans[0].tci & VID_CFI_MASK; |
1080 | ovs_be16 mask = match->wc.masks.vlans[0].tci & VID_CFI_MASK; | |
95f61ba8 SH |
1081 | |
1082 | if (mask == htons(VLAN_VID_MASK | VLAN_CFI)) { | |
be7ac2f3 | 1083 | nxm_put_16(&ctx, MFF_VLAN_VID, oxm, vid); |
95f61ba8 | 1084 | } else if (mask) { |
be7ac2f3 | 1085 | nxm_put_16m(&ctx, MFF_VLAN_VID, oxm, vid, mask); |
95f61ba8 SH |
1086 | } |
1087 | ||
f0fb825a | 1088 | if (vid && vlan_tci_to_pcp(match->wc.masks.vlans[0].tci)) { |
be7ac2f3 | 1089 | nxm_put_8(&ctx, MFF_VLAN_PCP, oxm, |
f0fb825a | 1090 | vlan_tci_to_pcp(flow->vlans[0].tci)); |
95f61ba8 SH |
1091 | } |
1092 | ||
1093 | } else { | |
be7ac2f3 | 1094 | nxm_put_16m(&ctx, MFF_VLAN_TCI, oxm, flow->vlans[0].tci, |
f0fb825a | 1095 | match->wc.masks.vlans[0].tci); |
95f61ba8 | 1096 | } |
09246b99 | 1097 | |
b02475c5 | 1098 | /* MPLS. */ |
3d4b2e6e | 1099 | if (eth_type_mpls(dl_type)) { |
8bfd0fda | 1100 | if (match->wc.masks.mpls_lse[0] & htonl(MPLS_TC_MASK)) { |
be7ac2f3 | 1101 | nxm_put_8(&ctx, MFF_MPLS_TC, oxm, |
9d84066c | 1102 | mpls_lse_to_tc(flow->mpls_lse[0])); |
b02475c5 SH |
1103 | } |
1104 | ||
8bfd0fda | 1105 | if (match->wc.masks.mpls_lse[0] & htonl(MPLS_BOS_MASK)) { |
be7ac2f3 | 1106 | nxm_put_8(&ctx, MFF_MPLS_BOS, oxm, |
9d84066c | 1107 | mpls_lse_to_bos(flow->mpls_lse[0])); |
b02475c5 SH |
1108 | } |
1109 | ||
8bfd0fda | 1110 | if (match->wc.masks.mpls_lse[0] & htonl(MPLS_LABEL_MASK)) { |
be7ac2f3 | 1111 | nxm_put_32(&ctx, MFF_MPLS_LABEL, oxm, |
8bfd0fda | 1112 | htonl(mpls_lse_to_label(flow->mpls_lse[0]))); |
b02475c5 SH |
1113 | } |
1114 | } | |
1115 | ||
66642cb4 | 1116 | /* L3. */ |
5e10215d | 1117 | if (is_ip_any(flow)) { |
be7ac2f3 | 1118 | nxm_put_ip(&ctx, match, oxm); |
3d4b2e6e JS |
1119 | } else if (dl_type == htons(ETH_TYPE_ARP) || |
1120 | dl_type == htons(ETH_TYPE_RARP)) { | |
09246b99 | 1121 | /* ARP. */ |
81a76618 | 1122 | if (match->wc.masks.nw_proto) { |
be7ac2f3 | 1123 | nxm_put_16(&ctx, MFF_ARP_OP, oxm, |
b5ae8913 | 1124 | htons(flow->nw_proto)); |
09246b99 | 1125 | } |
be7ac2f3 | 1126 | nxm_put_32m(&ctx, MFF_ARP_SPA, oxm, |
81a76618 | 1127 | flow->nw_src, match->wc.masks.nw_src); |
be7ac2f3 | 1128 | nxm_put_32m(&ctx, MFF_ARP_TPA, oxm, |
81a76618 | 1129 | flow->nw_dst, match->wc.masks.nw_dst); |
be7ac2f3 | 1130 | nxm_put_eth_masked(&ctx, MFF_ARP_SHA, oxm, |
81a76618 | 1131 | flow->arp_sha, match->wc.masks.arp_sha); |
be7ac2f3 | 1132 | nxm_put_eth_masked(&ctx, MFF_ARP_THA, oxm, |
81a76618 | 1133 | flow->arp_tha, match->wc.masks.arp_tha); |
09246b99 BP |
1134 | } |
1135 | ||
1136 | /* Tunnel ID. */ | |
be7ac2f3 | 1137 | nxm_put_64m(&ctx, MFF_TUN_ID, oxm, |
0ad90c84 JR |
1138 | flow->tunnel.tun_id, match->wc.masks.tunnel.tun_id); |
1139 | ||
1140 | /* Other tunnel metadata. */ | |
be7ac2f3 | 1141 | nxm_put_16m(&ctx, MFF_TUN_FLAGS, oxm, |
b666962b | 1142 | htons(flow->tunnel.flags), htons(match->wc.masks.tunnel.flags)); |
be7ac2f3 | 1143 | nxm_put_32m(&ctx, MFF_TUN_SRC, oxm, |
0ad90c84 | 1144 | flow->tunnel.ip_src, match->wc.masks.tunnel.ip_src); |
be7ac2f3 | 1145 | nxm_put_32m(&ctx, MFF_TUN_DST, oxm, |
0ad90c84 | 1146 | flow->tunnel.ip_dst, match->wc.masks.tunnel.ip_dst); |
be7ac2f3 | 1147 | nxm_put_ipv6(&ctx, MFF_TUN_IPV6_SRC, oxm, |
7dad8e9a | 1148 | &flow->tunnel.ipv6_src, &match->wc.masks.tunnel.ipv6_src); |
be7ac2f3 | 1149 | nxm_put_ipv6(&ctx, MFF_TUN_IPV6_DST, oxm, |
7dad8e9a | 1150 | &flow->tunnel.ipv6_dst, &match->wc.masks.tunnel.ipv6_dst); |
be7ac2f3 | 1151 | nxm_put_16m(&ctx, MFF_TUN_GBP_ID, oxm, |
ac6073e3 | 1152 | flow->tunnel.gbp_id, match->wc.masks.tunnel.gbp_id); |
be7ac2f3 | 1153 | nxm_put_8m(&ctx, MFF_TUN_GBP_FLAGS, oxm, |
ac6073e3 | 1154 | flow->tunnel.gbp_flags, match->wc.masks.tunnel.gbp_flags); |
9558d2a5 | 1155 | tun_metadata_to_nx_match(b, oxm, match); |
09246b99 | 1156 | |
b6c9e612 | 1157 | /* Registers. */ |
a678b23e BP |
1158 | if (oxm < OFP15_VERSION) { |
1159 | for (i = 0; i < FLOW_N_REGS; i++) { | |
be7ac2f3 | 1160 | nxm_put_32m(&ctx, MFF_REG0 + i, oxm, |
a678b23e BP |
1161 | htonl(flow->regs[i]), htonl(match->wc.masks.regs[i])); |
1162 | } | |
1163 | } else { | |
1164 | for (i = 0; i < FLOW_N_XREGS; i++) { | |
be7ac2f3 | 1165 | nxm_put_64m(&ctx, MFF_XREG0 + i, oxm, |
a678b23e BP |
1166 | htonll(flow_get_xreg(flow, i)), |
1167 | htonll(flow_get_xreg(&match->wc.masks, i))); | |
1168 | } | |
b6c9e612 BP |
1169 | } |
1170 | ||
8e53fe8c | 1171 | /* Packet mark. */ |
be7ac2f3 | 1172 | nxm_put_32m(&ctx, MFF_PKT_MARK, oxm, htonl(flow->pkt_mark), |
ac923e91 JG |
1173 | htonl(match->wc.masks.pkt_mark)); |
1174 | ||
07659514 | 1175 | /* Connection tracking. */ |
be7ac2f3 | 1176 | nxm_put_32m(&ctx, MFF_CT_STATE, oxm, htonl(flow->ct_state), |
07659514 | 1177 | htonl(match->wc.masks.ct_state)); |
be7ac2f3 | 1178 | nxm_put_16m(&ctx, MFF_CT_ZONE, oxm, htons(flow->ct_zone), |
07659514 | 1179 | htons(match->wc.masks.ct_zone)); |
be7ac2f3 | 1180 | nxm_put_32m(&ctx, MFF_CT_MARK, oxm, htonl(flow->ct_mark), |
8e53fe8c | 1181 | htonl(match->wc.masks.ct_mark)); |
be7ac2f3 | 1182 | nxm_put_128m(&ctx, MFF_CT_LABEL, oxm, hton128(flow->ct_label), |
8ff10dd5 | 1183 | hton128(match->wc.masks.ct_label)); |
be7ac2f3 | 1184 | nxm_put_32m(&ctx, MFF_CT_NW_SRC, oxm, |
daf4d3c1 | 1185 | flow->ct_nw_src, match->wc.masks.ct_nw_src); |
be7ac2f3 | 1186 | nxm_put_ipv6(&ctx, MFF_CT_IPV6_SRC, oxm, |
daf4d3c1 | 1187 | &flow->ct_ipv6_src, &match->wc.masks.ct_ipv6_src); |
be7ac2f3 | 1188 | nxm_put_32m(&ctx, MFF_CT_NW_DST, oxm, |
daf4d3c1 | 1189 | flow->ct_nw_dst, match->wc.masks.ct_nw_dst); |
be7ac2f3 | 1190 | nxm_put_ipv6(&ctx, MFF_CT_IPV6_DST, oxm, |
daf4d3c1 JR |
1191 | &flow->ct_ipv6_dst, &match->wc.masks.ct_ipv6_dst); |
1192 | if (flow->ct_nw_proto) { | |
e4713f24 JP |
1193 | nxm_put_8m(&ctx, MFF_CT_NW_PROTO, oxm, flow->ct_nw_proto, |
1194 | match->wc.masks.ct_nw_proto); | |
be7ac2f3 | 1195 | nxm_put_16m(&ctx, MFF_CT_TP_SRC, oxm, |
daf4d3c1 | 1196 | flow->ct_tp_src, match->wc.masks.ct_tp_src); |
be7ac2f3 | 1197 | nxm_put_16m(&ctx, MFF_CT_TP_DST, oxm, |
daf4d3c1 JR |
1198 | flow->ct_tp_dst, match->wc.masks.ct_tp_dst); |
1199 | } | |
969fc56c | 1200 | /* OpenFlow 1.1+ Metadata. */ |
be7ac2f3 | 1201 | nxm_put_64m(&ctx, MFF_METADATA, oxm, |
9d84066c | 1202 | flow->metadata, match->wc.masks.metadata); |
969fc56c | 1203 | |
e729e793 | 1204 | /* Cookie. */ |
f8047558 BP |
1205 | if (cookie_mask) { |
1206 | bool masked = cookie_mask != OVS_BE64_MAX; | |
1207 | ||
1208 | cookie &= cookie_mask; | |
1209 | nx_put_header__(b, NXM_NX_COOKIE, masked); | |
1210 | ofpbuf_put(b, &cookie, sizeof cookie); | |
1211 | if (masked) { | |
1212 | ofpbuf_put(b, &cookie_mask, sizeof cookie_mask); | |
1213 | } | |
1214 | } | |
e729e793 | 1215 | |
3d4b2e6e JS |
1216 | if (match_has_default_packet_type(match) && !ctx.implied_ethernet) { |
1217 | uint64_t pt_stub[16 / 8]; | |
1218 | struct ofpbuf pt; | |
1219 | ofpbuf_use_stack(&pt, pt_stub, sizeof pt_stub); | |
1220 | nxm_put_entry_raw(&pt, MFF_PACKET_TYPE, oxm, &flow->packet_type, | |
1221 | NULL, sizeof flow->packet_type); | |
1222 | ||
1223 | ofpbuf_insert(b, start_len, pt.data, pt.size); | |
1224 | } | |
1225 | ||
6fd6ed71 | 1226 | match_len = b->size - start_len; |
7623f4dd SH |
1227 | return match_len; |
1228 | } | |
1229 | ||
81a76618 | 1230 | /* Appends to 'b' the nx_match format that expresses 'match', plus enough zero |
7623f4dd SH |
1231 | * bytes to pad the nx_match out to a multiple of 8. For Flow Mod and Flow |
1232 | * Stats Requests messages, a 'cookie' and 'cookie_mask' may be supplied. | |
1233 | * Otherwise, 'cookie_mask' should be zero. | |
1234 | * | |
1235 | * This function can cause 'b''s data to be reallocated. | |
1236 | * | |
1237 | * Returns the number of bytes appended to 'b', excluding padding. The return | |
1238 | * value can be zero if it appended nothing at all to 'b' (which happens if | |
1239 | * 'cr' is a catch-all rule that matches every packet). */ | |
1240 | int | |
81a76618 | 1241 | nx_put_match(struct ofpbuf *b, const struct match *match, |
7623f4dd SH |
1242 | ovs_be64 cookie, ovs_be64 cookie_mask) |
1243 | { | |
9d84066c | 1244 | int match_len = nx_put_raw(b, 0, match, cookie, cookie_mask); |
7623f4dd | 1245 | |
f6e984d7 | 1246 | ofpbuf_put_zeros(b, PAD_SIZE(match_len, 8)); |
7623f4dd SH |
1247 | return match_len; |
1248 | } | |
1249 | ||
9d84066c | 1250 | /* Appends to 'b' an struct ofp11_match_header followed by the OXM format that |
9f6e20b7 | 1251 | * expresses 'match', plus enough zero bytes to pad the data appended out to a |
81a76618 | 1252 | * multiple of 8. |
7623f4dd | 1253 | * |
9d84066c BP |
1254 | * OXM differs slightly among versions of OpenFlow. Specify the OpenFlow |
1255 | * version in use as 'version'. | |
1256 | * | |
7623f4dd SH |
1257 | * This function can cause 'b''s data to be reallocated. |
1258 | * | |
1259 | * Returns the number of bytes appended to 'b', excluding the padding. Never | |
1260 | * returns zero. */ | |
1261 | int | |
9d84066c BP |
1262 | oxm_put_match(struct ofpbuf *b, const struct match *match, |
1263 | enum ofp_version version) | |
7623f4dd SH |
1264 | { |
1265 | int match_len; | |
1266 | struct ofp11_match_header *omh; | |
6fd6ed71 | 1267 | size_t start_len = b->size; |
7623f4dd SH |
1268 | ovs_be64 cookie = htonll(0), cookie_mask = htonll(0); |
1269 | ||
1270 | ofpbuf_put_uninit(b, sizeof *omh); | |
9d84066c BP |
1271 | match_len = (nx_put_raw(b, version, match, cookie, cookie_mask) |
1272 | + sizeof *omh); | |
f6e984d7 | 1273 | ofpbuf_put_zeros(b, PAD_SIZE(match_len, 8)); |
7623f4dd | 1274 | |
db5a1019 | 1275 | omh = ofpbuf_at(b, start_len, sizeof *omh); |
7623f4dd SH |
1276 | omh->type = htons(OFPMT_OXM); |
1277 | omh->length = htons(match_len); | |
1278 | ||
09246b99 BP |
1279 | return match_len; |
1280 | } | |
178742f9 | 1281 | |
9f6e20b7 BP |
1282 | /* Appends to 'b' the OXM formats that expresses 'match', without header or |
1283 | * padding. | |
1284 | * | |
1285 | * OXM differs slightly among versions of OpenFlow. Specify the OpenFlow | |
1286 | * version in use as 'version'. | |
1287 | * | |
1288 | * This function can cause 'b''s data to be reallocated. */ | |
1289 | void | |
1290 | oxm_put_raw(struct ofpbuf *b, const struct match *match, | |
1291 | enum ofp_version version) | |
1292 | { | |
1293 | nx_put_raw(b, version, match, 0, 0); | |
1294 | } | |
1295 | ||
53eb84a5 SH |
1296 | /* Appends to 'b' the nx_match format that expresses the tlv corresponding |
1297 | * to 'id'. If mask is not all-ones then it is also formated as the value | |
1298 | * of the tlv. */ | |
1299 | static void | |
1300 | nx_format_mask_tlv(struct ds *ds, enum mf_field_id id, | |
1301 | const union mf_value *mask) | |
1302 | { | |
1303 | const struct mf_field *mf = mf_from_id(id); | |
1304 | ||
1305 | ds_put_format(ds, "%s", mf->name); | |
1306 | ||
1307 | if (!is_all_ones(mask, mf->n_bytes)) { | |
1308 | ds_put_char(ds, '='); | |
50f96b10 | 1309 | mf_format(mf, mask, NULL, NULL, ds); |
53eb84a5 SH |
1310 | } |
1311 | ||
1312 | ds_put_char(ds, ','); | |
1313 | } | |
1314 | ||
1315 | /* Appends a string representation of 'fa_' to 'ds'. | |
1316 | * The TLVS value of 'fa_' is treated as a mask and | |
1317 | * only the name of fields is formated if it is all ones. */ | |
1318 | void | |
1319 | oxm_format_field_array(struct ds *ds, const struct field_array *fa) | |
1320 | { | |
1321 | size_t start_len = ds->length; | |
e8dba719 | 1322 | size_t i, offset = 0; |
53eb84a5 | 1323 | |
e8dba719 JR |
1324 | BITMAP_FOR_EACH_1 (i, MFF_N_IDS, fa->used.bm) { |
1325 | const struct mf_field *mf = mf_from_id(i); | |
1326 | union mf_value value; | |
1327 | ||
1328 | memcpy(&value, fa->values + offset, mf->n_bytes); | |
1329 | nx_format_mask_tlv(ds, i, &value); | |
1330 | offset += mf->n_bytes; | |
53eb84a5 SH |
1331 | } |
1332 | ||
1333 | if (ds->length > start_len) { | |
1334 | ds_chomp(ds, ','); | |
1335 | } | |
1336 | } | |
1337 | ||
1338 | /* Appends to 'b' a series of OXM TLVs corresponding to the series | |
1339 | * of enum mf_field_id and value tuples in 'fa_'. | |
1340 | * | |
1341 | * OXM differs slightly among versions of OpenFlow. Specify the OpenFlow | |
1342 | * version in use as 'version'. | |
1343 | * | |
1344 | * This function can cause 'b''s data to be reallocated. | |
1345 | * | |
1346 | * Returns the number of bytes appended to 'b'. May return zero. */ | |
1347 | int | |
1348 | oxm_put_field_array(struct ofpbuf *b, const struct field_array *fa, | |
1349 | enum ofp_version version) | |
1350 | { | |
1351 | size_t start_len = b->size; | |
53eb84a5 SH |
1352 | |
1353 | /* Field arrays are only used with the group selection method | |
d5651b84 | 1354 | * property and group properties are only available in OpenFlow 1.5+. |
53eb84a5 SH |
1355 | * So the following assertion should never fail. |
1356 | * | |
1357 | * If support for older OpenFlow versions is desired then some care | |
1358 | * will need to be taken of different TLVs that handle the same | |
1359 | * flow fields. In particular: | |
1360 | * - VLAN_TCI, VLAN_VID and MFF_VLAN_PCP | |
1361 | * - IP_DSCP_MASK and DSCP_SHIFTED | |
1362 | * - REGS and XREGS | |
1363 | */ | |
1364 | ovs_assert(version >= OFP15_VERSION); | |
1365 | ||
e8dba719 JR |
1366 | size_t i, offset = 0; |
1367 | ||
1368 | BITMAP_FOR_EACH_1 (i, MFF_N_IDS, fa->used.bm) { | |
1369 | const struct mf_field *mf = mf_from_id(i); | |
1370 | union mf_value value; | |
1371 | ||
1372 | memcpy(&value, fa->values + offset, mf->n_bytes); | |
1373 | ||
1374 | int len = mf_field_len(mf, &value, NULL, NULL); | |
be7ac2f3 BP |
1375 | nxm_put_entry_raw(b, i, version, |
1376 | &value + mf->n_bytes - len, NULL, len); | |
e8dba719 | 1377 | offset += mf->n_bytes; |
53eb84a5 SH |
1378 | } |
1379 | ||
1380 | return b->size - start_len; | |
1381 | } | |
1382 | ||
f8047558 | 1383 | static void |
508a9338 | 1384 | nx_put_header__(struct ofpbuf *b, uint64_t header, bool masked) |
f8047558 | 1385 | { |
508a9338 BP |
1386 | uint64_t masked_header = masked ? nxm_make_wild_header(header) : header; |
1387 | ovs_be64 network_header = htonll(masked_header); | |
f8047558 | 1388 | |
508a9338 | 1389 | ofpbuf_put(b, &network_header, nxm_header_len(header)); |
f8047558 BP |
1390 | } |
1391 | ||
178742f9 BP |
1392 | void |
1393 | nx_put_header(struct ofpbuf *b, enum mf_field_id field, | |
1394 | enum ofp_version version, bool masked) | |
1395 | { | |
f8047558 | 1396 | nx_put_header__(b, mf_oxm_header(field, version), masked); |
178742f9 BP |
1397 | } |
1398 | ||
04f48a68 YHW |
1399 | void nx_put_mff_header(struct ofpbuf *b, const struct mf_field *mff, |
1400 | enum ofp_version version, bool masked) | |
1401 | { | |
1402 | if (mff->mapped) { | |
1403 | nx_put_header_len(b, mff->id, version, masked, mff->n_bytes); | |
1404 | } else { | |
1405 | nx_put_header(b, mff->id, version, masked); | |
1406 | } | |
1407 | } | |
1408 | ||
dc3eb953 JG |
1409 | static void |
1410 | nx_put_header_len(struct ofpbuf *b, enum mf_field_id field, | |
1411 | enum ofp_version version, bool masked, size_t n_bytes) | |
1412 | { | |
1413 | uint64_t header = mf_oxm_header(field, version); | |
1414 | ||
1415 | header = NXM_HEADER(nxm_vendor(header), nxm_class(header), | |
1416 | nxm_field(header), false, | |
1417 | nxm_experimenter_len(header) + n_bytes); | |
1418 | ||
1419 | nx_put_header__(b, header, masked); | |
1420 | } | |
1421 | ||
178742f9 | 1422 | void |
04f48a68 YHW |
1423 | nx_put_entry(struct ofpbuf *b, const struct mf_field *mff, |
1424 | enum ofp_version version, const union mf_value *value, | |
1425 | const union mf_value *mask) | |
178742f9 | 1426 | { |
1cb20095 | 1427 | bool masked; |
4ede8c79 | 1428 | int len, offset; |
178742f9 | 1429 | |
04f48a68 YHW |
1430 | len = mf_field_len(mff, value, mask, &masked); |
1431 | offset = mff->n_bytes - len; | |
4ede8c79 | 1432 | |
be7ac2f3 BP |
1433 | nxm_put_entry_raw(b, mff->id, version, |
1434 | &value->u8 + offset, masked ? &mask->u8 + offset : NULL, | |
1435 | len); | |
178742f9 | 1436 | } |
09246b99 BP |
1437 | \f |
1438 | /* nx_match_to_string() and helpers. */ | |
1439 | ||
508a9338 | 1440 | static void format_nxm_field_name(struct ds *, uint64_t header); |
f393f81e | 1441 | |
09246b99 BP |
1442 | char * |
1443 | nx_match_to_string(const uint8_t *p, unsigned int match_len) | |
1444 | { | |
09246b99 BP |
1445 | if (!match_len) { |
1446 | return xstrdup("<any>"); | |
1447 | } | |
1448 | ||
0a2869d5 BP |
1449 | struct ofpbuf b = ofpbuf_const_initializer(p, match_len); |
1450 | struct ds s = DS_EMPTY_INITIALIZER; | |
6fd6ed71 | 1451 | while (b.size) { |
178742f9 BP |
1452 | union mf_value value; |
1453 | union mf_value mask; | |
1454 | enum ofperr error; | |
508a9338 | 1455 | uint64_t header; |
178742f9 BP |
1456 | int value_len; |
1457 | ||
04f48a68 | 1458 | error = nx_pull_entry__(&b, true, NULL, &header, NULL, &value, &mask); |
178742f9 BP |
1459 | if (error) { |
1460 | break; | |
1461 | } | |
1462 | value_len = MIN(sizeof value, nxm_field_bytes(header)); | |
09246b99 BP |
1463 | |
1464 | if (s.length) { | |
1465 | ds_put_cstr(&s, ", "); | |
1466 | } | |
1467 | ||
f393f81e | 1468 | format_nxm_field_name(&s, header); |
09246b99 BP |
1469 | ds_put_char(&s, '('); |
1470 | ||
178742f9 BP |
1471 | for (int i = 0; i < value_len; i++) { |
1472 | ds_put_format(&s, "%02x", ((const uint8_t *) &value)[i]); | |
09246b99 | 1473 | } |
178742f9 | 1474 | if (nxm_hasmask(header)) { |
09246b99 | 1475 | ds_put_char(&s, '/'); |
178742f9 BP |
1476 | for (int i = 0; i < value_len; i++) { |
1477 | ds_put_format(&s, "%02x", ((const uint8_t *) &mask)[i]); | |
09246b99 BP |
1478 | } |
1479 | } | |
1480 | ds_put_char(&s, ')'); | |
09246b99 BP |
1481 | } |
1482 | ||
6fd6ed71 | 1483 | if (b.size) { |
09246b99 BP |
1484 | if (s.length) { |
1485 | ds_put_cstr(&s, ", "); | |
1486 | } | |
1487 | ||
6fd6ed71 | 1488 | ds_put_format(&s, "<%u invalid bytes>", b.size); |
09246b99 BP |
1489 | } |
1490 | ||
1491 | return ds_steal_cstr(&s); | |
1492 | } | |
1493 | ||
7623f4dd | 1494 | char * |
db5a1019 | 1495 | oxm_match_to_string(const struct ofpbuf *p, unsigned int match_len) |
7623f4dd | 1496 | { |
6fd6ed71 | 1497 | const struct ofp11_match_header *omh = p->data; |
7623f4dd SH |
1498 | uint16_t match_len_; |
1499 | struct ds s; | |
1500 | ||
1501 | ds_init(&s); | |
1502 | ||
1503 | if (match_len < sizeof *omh) { | |
1504 | ds_put_format(&s, "<match too short: %u>", match_len); | |
1505 | goto err; | |
1506 | } | |
1507 | ||
1508 | if (omh->type != htons(OFPMT_OXM)) { | |
1509 | ds_put_format(&s, "<bad match type field: %u>", ntohs(omh->type)); | |
1510 | goto err; | |
1511 | } | |
1512 | ||
1513 | match_len_ = ntohs(omh->length); | |
1514 | if (match_len_ < sizeof *omh) { | |
1515 | ds_put_format(&s, "<match length field too short: %u>", match_len_); | |
1516 | goto err; | |
1517 | } | |
1518 | ||
1519 | if (match_len_ != match_len) { | |
1520 | ds_put_format(&s, "<match length field incorrect: %u != %u>", | |
1521 | match_len_, match_len); | |
1522 | goto err; | |
1523 | } | |
1524 | ||
db5a1019 AW |
1525 | return nx_match_to_string(ofpbuf_at(p, sizeof *omh, 0), |
1526 | match_len - sizeof *omh); | |
7623f4dd SH |
1527 | |
1528 | err: | |
1529 | return ds_steal_cstr(&s); | |
1530 | } | |
1531 | ||
178742f9 BP |
1532 | void |
1533 | nx_format_field_name(enum mf_field_id id, enum ofp_version version, | |
1534 | struct ds *s) | |
1535 | { | |
1536 | format_nxm_field_name(s, mf_oxm_header(id, version)); | |
1537 | } | |
1538 | ||
f393f81e | 1539 | static void |
508a9338 | 1540 | format_nxm_field_name(struct ds *s, uint64_t header) |
f393f81e | 1541 | { |
178742f9 BP |
1542 | const struct nxm_field *f = nxm_field_by_header(header); |
1543 | if (f) { | |
1544 | ds_put_cstr(s, f->name); | |
1545 | if (nxm_hasmask(header)) { | |
28da1f8f BP |
1546 | ds_put_cstr(s, "_W"); |
1547 | } | |
e729e793 JP |
1548 | } else if (header == NXM_NX_COOKIE) { |
1549 | ds_put_cstr(s, "NXM_NX_COOKIE"); | |
1550 | } else if (header == NXM_NX_COOKIE_W) { | |
1551 | ds_put_cstr(s, "NXM_NX_COOKIE_W"); | |
f393f81e | 1552 | } else { |
c8058af7 | 1553 | ds_put_format(s, "%d:%d", nxm_class(header), nxm_field(header)); |
f393f81e BP |
1554 | } |
1555 | } | |
1556 | ||
178742f9 BP |
1557 | static bool |
1558 | streq_len(const char *a, size_t a_len, const char *b) | |
1559 | { | |
1560 | return strlen(b) == a_len && !memcmp(a, b, a_len); | |
1561 | } | |
1562 | ||
508a9338 | 1563 | static uint64_t |
558d80cb | 1564 | parse_nxm_field_name(const char *name, int name_len) |
09246b99 | 1565 | { |
178742f9 | 1566 | const struct nxm_field *f; |
28da1f8f | 1567 | bool wild; |
28da1f8f | 1568 | |
178742f9 BP |
1569 | f = mf_parse_subfield_name(name, name_len, &wild); |
1570 | if (f) { | |
b5ae8913 | 1571 | if (!wild) { |
178742f9 BP |
1572 | return f->header; |
1573 | } else if (mf_from_id(f->id)->maskable != MFM_NONE) { | |
1574 | return nxm_make_wild_header(f->header); | |
09246b99 BP |
1575 | } |
1576 | } | |
1577 | ||
178742f9 BP |
1578 | if (streq_len(name, name_len, "NXM_NX_COOKIE")) { |
1579 | return NXM_NX_COOKIE; | |
1580 | } else if (streq_len(name, name_len, "NXM_NX_COOKIE_W")) { | |
1581 | return NXM_NX_COOKIE_W; | |
e729e793 JP |
1582 | } |
1583 | ||
508a9338 | 1584 | /* Check whether it's a field header value as hex. |
558d80cb BP |
1585 | * (This isn't ordinarily useful except for testing error behavior.) */ |
1586 | if (name_len == 8) { | |
508a9338 | 1587 | uint64_t header; |
0429d959 BP |
1588 | bool ok; |
1589 | ||
508a9338 | 1590 | header = hexits_value(name, name_len, &ok) << 32; |
0429d959 | 1591 | if (ok) { |
558d80cb BP |
1592 | return header; |
1593 | } | |
508a9338 BP |
1594 | } else if (name_len == 16) { |
1595 | uint64_t header; | |
1596 | bool ok; | |
1597 | ||
1598 | header = hexits_value(name, name_len, &ok); | |
1599 | if (ok && is_experimenter_oxm(header)) { | |
1600 | return header; | |
1601 | } | |
558d80cb BP |
1602 | } |
1603 | ||
1604 | return 0; | |
09246b99 | 1605 | } |
09246b99 BP |
1606 | \f |
1607 | /* nx_match_from_string(). */ | |
1608 | ||
7623f4dd SH |
1609 | static int |
1610 | nx_match_from_string_raw(const char *s, struct ofpbuf *b) | |
09246b99 BP |
1611 | { |
1612 | const char *full_s = s; | |
6fd6ed71 | 1613 | const size_t start_len = b->size; |
09246b99 BP |
1614 | |
1615 | if (!strcmp(s, "<any>")) { | |
6fd6ed71 | 1616 | /* Ensure that 'b->data' isn't actually null. */ |
09246b99 BP |
1617 | ofpbuf_prealloc_tailroom(b, 1); |
1618 | return 0; | |
1619 | } | |
1620 | ||
1621 | for (s += strspn(s, ", "); *s; s += strspn(s, ", ")) { | |
558d80cb | 1622 | const char *name; |
508a9338 | 1623 | uint64_t header; |
00fe22f8 | 1624 | ovs_be64 nw_header; |
09246b99 | 1625 | int name_len; |
78090f63 | 1626 | size_t n; |
09246b99 | 1627 | |
558d80cb | 1628 | name = s; |
09246b99 BP |
1629 | name_len = strcspn(s, "("); |
1630 | if (s[name_len] != '(') { | |
1631 | ovs_fatal(0, "%s: missing ( at end of nx_match", full_s); | |
1632 | } | |
1633 | ||
558d80cb BP |
1634 | header = parse_nxm_field_name(name, name_len); |
1635 | if (!header) { | |
09246b99 BP |
1636 | ovs_fatal(0, "%s: unknown field `%.*s'", full_s, name_len, s); |
1637 | } | |
1638 | ||
1639 | s += name_len + 1; | |
1640 | ||
e659c96b | 1641 | b->header = ofpbuf_put_uninit(b, nxm_header_len(header)); |
78090f63 BP |
1642 | s = ofpbuf_put_hex(b, s, &n); |
1643 | if (n != nxm_field_bytes(header)) { | |
04f48a68 | 1644 | const struct mf_field *field = mf_from_oxm_header(header, NULL); |
00fe22f8 JG |
1645 | |
1646 | if (field && field->variable_len) { | |
1647 | if (n <= field->n_bytes) { | |
1648 | int len = (nxm_hasmask(header) ? n * 2 : n) + | |
1649 | nxm_experimenter_len(header); | |
1650 | ||
1651 | header = NXM_HEADER(nxm_vendor(header), nxm_class(header), | |
1652 | nxm_field(header), | |
1653 | nxm_hasmask(header) ? 1 : 0, len); | |
1654 | } else { | |
1655 | ovs_fatal(0, "expected to read at most %d bytes but got " | |
1656 | "%"PRIuSIZE, field->n_bytes, n); | |
1657 | } | |
1658 | } else { | |
1659 | ovs_fatal(0, "expected to read %d bytes but got %"PRIuSIZE, | |
1660 | nxm_field_bytes(header), n); | |
1661 | } | |
78090f63 | 1662 | } |
00fe22f8 | 1663 | nw_header = htonll(header); |
e659c96b | 1664 | memcpy(b->header, &nw_header, nxm_header_len(header)); |
00fe22f8 | 1665 | |
178742f9 | 1666 | if (nxm_hasmask(header)) { |
09246b99 BP |
1667 | s += strspn(s, " "); |
1668 | if (*s != '/') { | |
558d80cb BP |
1669 | ovs_fatal(0, "%s: missing / in masked field %.*s", |
1670 | full_s, name_len, name); | |
09246b99 | 1671 | } |
78090f63 BP |
1672 | s = ofpbuf_put_hex(b, s + 1, &n); |
1673 | if (n != nxm_field_bytes(header)) { | |
1674 | ovs_fatal(0, "%.2s: hex digits expected", s); | |
1675 | } | |
09246b99 BP |
1676 | } |
1677 | ||
1678 | s += strspn(s, " "); | |
1679 | if (*s != ')') { | |
558d80cb BP |
1680 | ovs_fatal(0, "%s: missing ) following field %.*s", |
1681 | full_s, name_len, name); | |
09246b99 BP |
1682 | } |
1683 | s++; | |
1684 | } | |
1685 | ||
6fd6ed71 | 1686 | return b->size - start_len; |
7623f4dd SH |
1687 | } |
1688 | ||
1689 | int | |
1690 | nx_match_from_string(const char *s, struct ofpbuf *b) | |
1691 | { | |
1692 | int match_len = nx_match_from_string_raw(s, b); | |
f6e984d7 | 1693 | ofpbuf_put_zeros(b, PAD_SIZE(match_len, 8)); |
7623f4dd SH |
1694 | return match_len; |
1695 | } | |
1696 | ||
1697 | int | |
1698 | oxm_match_from_string(const char *s, struct ofpbuf *b) | |
1699 | { | |
1700 | int match_len; | |
1701 | struct ofp11_match_header *omh; | |
6fd6ed71 | 1702 | size_t start_len = b->size; |
7623f4dd SH |
1703 | |
1704 | ofpbuf_put_uninit(b, sizeof *omh); | |
1705 | match_len = nx_match_from_string_raw(s, b) + sizeof *omh; | |
f6e984d7 | 1706 | ofpbuf_put_zeros(b, PAD_SIZE(match_len, 8)); |
7623f4dd | 1707 | |
db5a1019 | 1708 | omh = ofpbuf_at(b, start_len, sizeof *omh); |
7623f4dd SH |
1709 | omh->type = htons(OFPMT_OXM); |
1710 | omh->length = htons(match_len); | |
1711 | ||
09246b99 BP |
1712 | return match_len; |
1713 | } | |
b6c9e612 | 1714 | \f |
bdda5aca BP |
1715 | /* Parses 's' as a "move" action, in the form described in ovs-ofctl(8), into |
1716 | * '*move'. | |
1717 | * | |
1718 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
1719 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 1720 | char * OVS_WARN_UNUSED_RESULT |
f25d0cf3 | 1721 | nxm_parse_reg_move(struct ofpact_reg_move *move, const char *s) |
f393f81e BP |
1722 | { |
1723 | const char *full_s = s; | |
bdda5aca | 1724 | char *error; |
f393f81e | 1725 | |
bdda5aca BP |
1726 | error = mf_parse_subfield__(&move->src, &s); |
1727 | if (error) { | |
1728 | return error; | |
1729 | } | |
f393f81e | 1730 | if (strncmp(s, "->", 2)) { |
bdda5aca | 1731 | return xasprintf("%s: missing `->' following source", full_s); |
f393f81e BP |
1732 | } |
1733 | s += 2; | |
bdda5aca BP |
1734 | error = mf_parse_subfield(&move->dst, s); |
1735 | if (error) { | |
1736 | return error; | |
f393f81e BP |
1737 | } |
1738 | ||
f25d0cf3 | 1739 | if (move->src.n_bits != move->dst.n_bits) { |
bdda5aca BP |
1740 | return xasprintf("%s: source field is %d bits wide but destination is " |
1741 | "%d bits wide", full_s, | |
1742 | move->src.n_bits, move->dst.n_bits); | |
f393f81e | 1743 | } |
bdda5aca | 1744 | return NULL; |
f393f81e | 1745 | } |
f393f81e | 1746 | \f |
7eb4b1f1 | 1747 | /* nxm_format_reg_move(). */ |
f393f81e | 1748 | |
f393f81e | 1749 | void |
f25d0cf3 | 1750 | nxm_format_reg_move(const struct ofpact_reg_move *move, struct ds *s) |
f393f81e | 1751 | { |
b1c5bf1f | 1752 | ds_put_format(s, "%smove:%s", colors.special, colors.end); |
f25d0cf3 | 1753 | mf_format_subfield(&move->src, s); |
b1c5bf1f | 1754 | ds_put_format(s, "%s->%s", colors.special, colors.end); |
f25d0cf3 | 1755 | mf_format_subfield(&move->dst, s); |
f393f81e BP |
1756 | } |
1757 | ||
f25d0cf3 BP |
1758 | \f |
1759 | enum ofperr | |
67210a55 JR |
1760 | nxm_reg_move_check(const struct ofpact_reg_move *move, |
1761 | const struct match *match) | |
43edca57 | 1762 | { |
90bf1e07 | 1763 | enum ofperr error; |
43edca57 | 1764 | |
67210a55 | 1765 | error = mf_check_src(&move->src, match); |
43edca57 EJ |
1766 | if (error) { |
1767 | return error; | |
b6c9e612 BP |
1768 | } |
1769 | ||
67210a55 | 1770 | return mf_check_dst(&move->dst, match); |
f25d0cf3 | 1771 | } |
f25d0cf3 | 1772 | \f |
7eb4b1f1 | 1773 | /* nxm_execute_reg_move(). */ |
b6c9e612 | 1774 | |
816fd533 | 1775 | void |
f25d0cf3 | 1776 | nxm_reg_load(const struct mf_subfield *dst, uint64_t src_data, |
f74e7df7 | 1777 | struct flow *flow, struct flow_wildcards *wc) |
816fd533 | 1778 | { |
9bab681f | 1779 | union mf_subvalue src_subvalue; |
f74e7df7 | 1780 | union mf_subvalue mask_value; |
9bab681f | 1781 | ovs_be64 src_data_be = htonll(src_data); |
f25d0cf3 | 1782 | |
f74e7df7 JP |
1783 | memset(&mask_value, 0xff, sizeof mask_value); |
1784 | mf_write_subfield_flow(dst, &mask_value, &wc->masks); | |
1785 | ||
9bab681f IY |
1786 | bitwise_copy(&src_data_be, sizeof src_data_be, 0, |
1787 | &src_subvalue, sizeof src_subvalue, 0, | |
1788 | sizeof src_data_be * 8); | |
1789 | mf_write_subfield_flow(dst, &src_subvalue, flow); | |
b6c9e612 | 1790 | } |
bd85dac1 AZ |
1791 | \f |
1792 | /* nxm_parse_stack_action, works for both push() and pop(). */ | |
bdda5aca BP |
1793 | |
1794 | /* Parses 's' as a "push" or "pop" action, in the form described in | |
1795 | * ovs-ofctl(8), into '*stack_action'. | |
1796 | * | |
1797 | * Returns NULL if successful, otherwise a malloc()'d string describing the | |
1798 | * error. The caller is responsible for freeing the returned string. */ | |
cab50449 | 1799 | char * OVS_WARN_UNUSED_RESULT |
bd85dac1 AZ |
1800 | nxm_parse_stack_action(struct ofpact_stack *stack_action, const char *s) |
1801 | { | |
bdda5aca BP |
1802 | char *error; |
1803 | ||
1804 | error = mf_parse_subfield__(&stack_action->subfield, &s); | |
1805 | if (error) { | |
1806 | return error; | |
1807 | } | |
1808 | ||
bd85dac1 | 1809 | if (*s != '\0') { |
bdda5aca | 1810 | return xasprintf("%s: trailing garbage following push or pop", s); |
bd85dac1 | 1811 | } |
bdda5aca BP |
1812 | |
1813 | return NULL; | |
bd85dac1 AZ |
1814 | } |
1815 | ||
1816 | void | |
1817 | nxm_format_stack_push(const struct ofpact_stack *push, struct ds *s) | |
1818 | { | |
b1c5bf1f | 1819 | ds_put_format(s, "%spush:%s", colors.param, colors.end); |
bd85dac1 AZ |
1820 | mf_format_subfield(&push->subfield, s); |
1821 | } | |
1822 | ||
1823 | void | |
1824 | nxm_format_stack_pop(const struct ofpact_stack *pop, struct ds *s) | |
1825 | { | |
b1c5bf1f | 1826 | ds_put_format(s, "%spop:%s", colors.param, colors.end); |
bd85dac1 AZ |
1827 | mf_format_subfield(&pop->subfield, s); |
1828 | } | |
1829 | ||
bd85dac1 AZ |
1830 | enum ofperr |
1831 | nxm_stack_push_check(const struct ofpact_stack *push, | |
67210a55 | 1832 | const struct match *match) |
bd85dac1 | 1833 | { |
67210a55 | 1834 | return mf_check_src(&push->subfield, match); |
bd85dac1 AZ |
1835 | } |
1836 | ||
1837 | enum ofperr | |
1838 | nxm_stack_pop_check(const struct ofpact_stack *pop, | |
67210a55 | 1839 | const struct match *match) |
bd85dac1 | 1840 | { |
67210a55 | 1841 | return mf_check_dst(&pop->subfield, match); |
bd85dac1 AZ |
1842 | } |
1843 | ||
84cf3c1f JR |
1844 | /* nxm_execute_stack_push(), nxm_execute_stack_pop(). |
1845 | * | |
1846 | * A stack is an ofpbuf with 'data' pointing to the bottom of the stack and | |
1847 | * 'size' indexing the top of the stack. Each value of some byte length is | |
1848 | * stored to the stack immediately followed by the length of the value as an | |
1849 | * unsigned byte. This way a POP operation can first read the length byte, and | |
1850 | * then the appropriate number of bytes from the stack. This also means that | |
1851 | * it is only possible to traverse the stack from top to bottom. It is | |
1852 | * possible, however, to push values also to the bottom of the stack, which is | |
1853 | * useful when a stack has been serialized to a wire format in reverse order | |
1854 | * (topmost value first). | |
1855 | */ | |
1856 | ||
1857 | /* Push value 'v' of length 'bytes' to the top of 'stack'. */ | |
1858 | void | |
1859 | nx_stack_push(struct ofpbuf *stack, const void *v, uint8_t bytes) | |
bd85dac1 | 1860 | { |
84cf3c1f JR |
1861 | ofpbuf_put(stack, v, bytes); |
1862 | ofpbuf_put(stack, &bytes, sizeof bytes); | |
bd85dac1 AZ |
1863 | } |
1864 | ||
84cf3c1f JR |
1865 | /* Push value 'v' of length 'bytes' to the bottom of 'stack'. */ |
1866 | void | |
1867 | nx_stack_push_bottom(struct ofpbuf *stack, const void *v, uint8_t bytes) | |
bd85dac1 | 1868 | { |
84cf3c1f JR |
1869 | ofpbuf_push(stack, &bytes, sizeof bytes); |
1870 | ofpbuf_push(stack, v, bytes); | |
1871 | } | |
1f317cb5 | 1872 | |
84cf3c1f JR |
1873 | /* Pop the topmost value from 'stack', returning a pointer to the value in the |
1874 | * stack and the length of the value in '*bytes'. In case of underflow a NULL | |
1875 | * is returned and length is returned as zero via '*bytes'. */ | |
1876 | void * | |
1877 | nx_stack_pop(struct ofpbuf *stack, uint8_t *bytes) | |
1878 | { | |
1879 | if (!stack->size) { | |
1880 | *bytes = 0; | |
1881 | return NULL; | |
bd85dac1 AZ |
1882 | } |
1883 | ||
84cf3c1f JR |
1884 | stack->size -= sizeof *bytes; |
1885 | memcpy(bytes, ofpbuf_tail(stack), sizeof *bytes); | |
1886 | ||
1887 | ovs_assert(stack->size >= *bytes); | |
1888 | stack->size -= *bytes; | |
1889 | return ofpbuf_tail(stack); | |
bd85dac1 AZ |
1890 | } |
1891 | ||
1892 | void | |
1893 | nxm_execute_stack_push(const struct ofpact_stack *push, | |
bcd2633a JP |
1894 | const struct flow *flow, struct flow_wildcards *wc, |
1895 | struct ofpbuf *stack) | |
bd85dac1 AZ |
1896 | { |
1897 | union mf_subvalue dst_value; | |
1898 | ||
84cf3c1f JR |
1899 | mf_write_subfield_flow(&push->subfield, |
1900 | (union mf_subvalue *)&exact_match_mask, | |
1901 | &wc->masks); | |
bcd2633a | 1902 | |
bd85dac1 | 1903 | mf_read_subfield(&push->subfield, flow, &dst_value); |
84cf3c1f JR |
1904 | uint8_t bytes = DIV_ROUND_UP(push->subfield.n_bits, 8); |
1905 | nx_stack_push(stack, &dst_value.u8[sizeof dst_value - bytes], bytes); | |
bd85dac1 AZ |
1906 | } |
1907 | ||
2d9b49dd | 1908 | bool |
bd85dac1 | 1909 | nxm_execute_stack_pop(const struct ofpact_stack *pop, |
f74e7df7 JP |
1910 | struct flow *flow, struct flow_wildcards *wc, |
1911 | struct ofpbuf *stack) | |
bd85dac1 | 1912 | { |
84cf3c1f JR |
1913 | uint8_t src_bytes; |
1914 | const void *src = nx_stack_pop(stack, &src_bytes); | |
84cf3c1f JR |
1915 | if (src) { |
1916 | union mf_subvalue src_value; | |
1917 | uint8_t dst_bytes = DIV_ROUND_UP(pop->subfield.n_bits, 8); | |
f74e7df7 | 1918 | |
84cf3c1f JR |
1919 | if (src_bytes < dst_bytes) { |
1920 | memset(&src_value.u8[sizeof src_value - dst_bytes], 0, | |
1921 | dst_bytes - src_bytes); | |
1922 | } | |
1923 | memcpy(&src_value.u8[sizeof src_value - src_bytes], src, src_bytes); | |
1924 | mf_write_subfield_flow(&pop->subfield, | |
1925 | (union mf_subvalue *)&exact_match_mask, | |
1926 | &wc->masks); | |
1927 | mf_write_subfield_flow(&pop->subfield, &src_value, flow); | |
2d9b49dd | 1928 | return true; |
bd85dac1 | 1929 | } else { |
2d9b49dd BP |
1930 | /* Attempted to pop from an empty stack. */ |
1931 | return false; | |
bd85dac1 AZ |
1932 | } |
1933 | } | |
178742f9 BP |
1934 | \f |
1935 | /* Formats 'sf' into 's' in a format normally acceptable to | |
1936 | * mf_parse_subfield(). (It won't be acceptable if sf->field is NULL or if | |
1937 | * sf->field has no NXM name.) */ | |
1938 | void | |
1939 | mf_format_subfield(const struct mf_subfield *sf, struct ds *s) | |
1940 | { | |
1941 | if (!sf->field) { | |
1942 | ds_put_cstr(s, "<unknown>"); | |
1943 | } else { | |
e6556fe3 | 1944 | const struct nxm_field *f = nxm_field_by_mf_id(sf->field->id, 0); |
178742f9 BP |
1945 | ds_put_cstr(s, f ? f->name : sf->field->name); |
1946 | } | |
1947 | ||
1948 | if (sf->field && sf->ofs == 0 && sf->n_bits == sf->field->n_bits) { | |
1949 | ds_put_cstr(s, "[]"); | |
1950 | } else if (sf->n_bits == 1) { | |
1951 | ds_put_format(s, "[%d]", sf->ofs); | |
1952 | } else { | |
1953 | ds_put_format(s, "[%d..%d]", sf->ofs, sf->ofs + sf->n_bits - 1); | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | static const struct nxm_field * | |
1958 | mf_parse_subfield_name(const char *name, int name_len, bool *wild) | |
1959 | { | |
1960 | *wild = name_len > 2 && !memcmp(&name[name_len - 2], "_W", 2); | |
1961 | if (*wild) { | |
1962 | name_len -= 2; | |
1963 | } | |
1964 | ||
1965 | return nxm_field_by_name(name, name_len); | |
1966 | } | |
1967 | ||
1968 | /* Parses a subfield from the beginning of '*sp' into 'sf'. If successful, | |
1969 | * returns NULL and advances '*sp' to the first byte following the parsed | |
1970 | * string. On failure, returns a malloc()'d error message, does not modify | |
1971 | * '*sp', and does not properly initialize 'sf'. | |
1972 | * | |
1973 | * The syntax parsed from '*sp' takes the form "header[start..end]" where | |
1974 | * 'header' is the name of an NXM field and 'start' and 'end' are (inclusive) | |
1975 | * bit indexes. "..end" may be omitted to indicate a single bit. "start..end" | |
1976 | * may both be omitted (the [] are still required) to indicate an entire | |
1977 | * field. */ | |
cab50449 | 1978 | char * OVS_WARN_UNUSED_RESULT |
178742f9 BP |
1979 | mf_parse_subfield__(struct mf_subfield *sf, const char **sp) |
1980 | { | |
21b2fa61 | 1981 | const struct mf_field *field = NULL; |
178742f9 BP |
1982 | const struct nxm_field *f; |
1983 | const char *name; | |
1984 | int start, end; | |
1985 | const char *s; | |
1986 | int name_len; | |
1987 | bool wild; | |
1988 | ||
1989 | s = *sp; | |
1990 | name = s; | |
21b2fa61 | 1991 | name_len = strcspn(s, "[-"); |
178742f9 BP |
1992 | |
1993 | f = mf_parse_subfield_name(name, name_len, &wild); | |
21b2fa61 JR |
1994 | field = f ? mf_from_id(f->id) : mf_from_name_len(name, name_len); |
1995 | if (!field) { | |
178742f9 BP |
1996 | return xasprintf("%s: unknown field `%.*s'", *sp, name_len, s); |
1997 | } | |
178742f9 BP |
1998 | |
1999 | s += name_len; | |
21b2fa61 JR |
2000 | /* Assume full field. */ |
2001 | start = 0; | |
2002 | end = field->n_bits - 1; | |
2003 | if (*s == '[') { | |
2004 | if (!strncmp(s, "[]", 2)) { | |
2005 | /* Nothing to do. */ | |
2006 | } else if (ovs_scan(s, "[%d..%d]", &start, &end)) { | |
2007 | /* Nothing to do. */ | |
2008 | } else if (ovs_scan(s, "[%d]", &start)) { | |
2009 | end = start; | |
2010 | } else { | |
2011 | return xasprintf("%s: syntax error expecting [] or [<bit>] or " | |
2012 | "[<start>..<end>]", *sp); | |
2013 | } | |
2014 | s = strchr(s, ']') + 1; | |
178742f9 | 2015 | } |
178742f9 BP |
2016 | |
2017 | if (start > end) { | |
2018 | return xasprintf("%s: starting bit %d is after ending bit %d", | |
2019 | *sp, start, end); | |
2020 | } else if (start >= field->n_bits) { | |
2021 | return xasprintf("%s: starting bit %d is not valid because field is " | |
2022 | "only %d bits wide", *sp, start, field->n_bits); | |
2023 | } else if (end >= field->n_bits){ | |
2024 | return xasprintf("%s: ending bit %d is not valid because field is " | |
2025 | "only %d bits wide", *sp, end, field->n_bits); | |
2026 | } | |
2027 | ||
2028 | sf->field = field; | |
2029 | sf->ofs = start; | |
2030 | sf->n_bits = end - start + 1; | |
2031 | ||
2032 | *sp = s; | |
2033 | return NULL; | |
2034 | } | |
2035 | ||
2036 | /* Parses a subfield from the entirety of 's' into 'sf'. Returns NULL if | |
2037 | * successful, otherwise a malloc()'d string describing the error. The caller | |
2038 | * is responsible for freeing the returned string. | |
2039 | * | |
2040 | * The syntax parsed from 's' takes the form "header[start..end]" where | |
2041 | * 'header' is the name of an NXM field and 'start' and 'end' are (inclusive) | |
2042 | * bit indexes. "..end" may be omitted to indicate a single bit. "start..end" | |
2043 | * may both be omitted (the [] are still required) to indicate an entire | |
2044 | * field. */ | |
cab50449 | 2045 | char * OVS_WARN_UNUSED_RESULT |
178742f9 BP |
2046 | mf_parse_subfield(struct mf_subfield *sf, const char *s) |
2047 | { | |
2048 | char *error = mf_parse_subfield__(sf, &s); | |
2049 | if (!error && s[0]) { | |
2050 | error = xstrdup("unexpected input following field syntax"); | |
2051 | } | |
2052 | return error; | |
2053 | } | |
2054 | \f | |
2055 | /* Returns an bitmap in which each bit corresponds to the like-numbered field | |
2056 | * in the OFPXMC12_OPENFLOW_BASIC OXM class, in which the bit values are taken | |
2057 | * from the 'fields' bitmap. Only fields defined in OpenFlow 'version' are | |
2058 | * considered. | |
2059 | * | |
2060 | * This is useful for encoding OpenFlow 1.2 table stats messages. */ | |
2061 | ovs_be64 | |
2062 | oxm_bitmap_from_mf_bitmap(const struct mf_bitmap *fields, | |
2063 | enum ofp_version version) | |
2064 | { | |
2065 | uint64_t oxm_bitmap = 0; | |
2066 | int i; | |
2067 | ||
2068 | BITMAP_FOR_EACH_1 (i, MFF_N_IDS, fields->bm) { | |
508a9338 | 2069 | uint64_t oxm = mf_oxm_header(i, version); |
c8058af7 | 2070 | uint32_t class = nxm_class(oxm); |
178742f9 BP |
2071 | int field = nxm_field(oxm); |
2072 | ||
c8058af7 | 2073 | if (class == OFPXMC12_OPENFLOW_BASIC && field < 64) { |
178742f9 BP |
2074 | oxm_bitmap |= UINT64_C(1) << field; |
2075 | } | |
2076 | } | |
2077 | return htonll(oxm_bitmap); | |
2078 | } | |
2079 | ||
2080 | /* Opposite conversion from oxm_bitmap_from_mf_bitmap(). | |
2081 | * | |
2082 | * This is useful for decoding OpenFlow 1.2 table stats messages. */ | |
2083 | struct mf_bitmap | |
2084 | oxm_bitmap_to_mf_bitmap(ovs_be64 oxm_bitmap, enum ofp_version version) | |
2085 | { | |
2086 | struct mf_bitmap fields = MF_BITMAP_INITIALIZER; | |
2087 | ||
2088 | for (enum mf_field_id id = 0; id < MFF_N_IDS; id++) { | |
e6556fe3 BP |
2089 | uint64_t oxm = mf_oxm_header(id, version); |
2090 | if (oxm && version >= nxm_field_by_header(oxm)->version) { | |
c8058af7 | 2091 | uint32_t class = nxm_class(oxm); |
178742f9 BP |
2092 | int field = nxm_field(oxm); |
2093 | ||
c8058af7 | 2094 | if (class == OFPXMC12_OPENFLOW_BASIC |
178742f9 BP |
2095 | && field < 64 |
2096 | && oxm_bitmap & htonll(UINT64_C(1) << field)) { | |
2097 | bitmap_set1(fields.bm, id); | |
2098 | } | |
2099 | } | |
2100 | } | |
2101 | return fields; | |
2102 | } | |
2103 | ||
2104 | /* Returns a bitmap of fields that can be encoded in OXM and that can be | |
2105 | * modified with a "set_field" action. */ | |
2106 | struct mf_bitmap | |
2107 | oxm_writable_fields(void) | |
2108 | { | |
2109 | struct mf_bitmap b = MF_BITMAP_INITIALIZER; | |
2110 | int i; | |
2111 | ||
2112 | for (i = 0; i < MFF_N_IDS; i++) { | |
2113 | if (mf_oxm_header(i, 0) && mf_from_id(i)->writable) { | |
2114 | bitmap_set1(b.bm, i); | |
2115 | } | |
2116 | } | |
2117 | return b; | |
2118 | } | |
2119 | ||
2120 | /* Returns a bitmap of fields that can be encoded in OXM and that can be | |
2121 | * matched in a flow table. */ | |
2122 | struct mf_bitmap | |
2123 | oxm_matchable_fields(void) | |
2124 | { | |
2125 | struct mf_bitmap b = MF_BITMAP_INITIALIZER; | |
2126 | int i; | |
2127 | ||
2128 | for (i = 0; i < MFF_N_IDS; i++) { | |
2129 | if (mf_oxm_header(i, 0)) { | |
2130 | bitmap_set1(b.bm, i); | |
2131 | } | |
2132 | } | |
2133 | return b; | |
2134 | } | |
2135 | ||
2136 | /* Returns a bitmap of fields that can be encoded in OXM and that can be | |
2137 | * matched in a flow table with an arbitrary bitmask. */ | |
2138 | struct mf_bitmap | |
2139 | oxm_maskable_fields(void) | |
2140 | { | |
2141 | struct mf_bitmap b = MF_BITMAP_INITIALIZER; | |
2142 | int i; | |
2143 | ||
2144 | for (i = 0; i < MFF_N_IDS; i++) { | |
2145 | if (mf_oxm_header(i, 0) && mf_from_id(i)->maskable == MFM_FULLY) { | |
2146 | bitmap_set1(b.bm, i); | |
2147 | } | |
2148 | } | |
2149 | return b; | |
2150 | } | |
2151 | \f | |
2152 | struct nxm_field_index { | |
e6556fe3 BP |
2153 | struct hmap_node header_node; /* In nxm_header_map. */ |
2154 | struct hmap_node name_node; /* In nxm_name_map. */ | |
ca6ba700 | 2155 | struct ovs_list mf_node; /* In mf_mf_map[nf.id]. */ |
e6556fe3 | 2156 | const struct nxm_field nf; |
178742f9 BP |
2157 | }; |
2158 | ||
2159 | #include "nx-match.inc" | |
2160 | ||
2161 | static struct hmap nxm_header_map; | |
2162 | static struct hmap nxm_name_map; | |
ca6ba700 | 2163 | static struct ovs_list nxm_mf_map[MFF_N_IDS]; |
178742f9 BP |
2164 | |
2165 | static void | |
2166 | nxm_init(void) | |
2167 | { | |
2168 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
2169 | if (ovsthread_once_start(&once)) { | |
2170 | hmap_init(&nxm_header_map); | |
2171 | hmap_init(&nxm_name_map); | |
e6556fe3 | 2172 | for (int i = 0; i < MFF_N_IDS; i++) { |
417e7e66 | 2173 | ovs_list_init(&nxm_mf_map[i]); |
e6556fe3 | 2174 | } |
178742f9 BP |
2175 | for (struct nxm_field_index *nfi = all_nxm_fields; |
2176 | nfi < &all_nxm_fields[ARRAY_SIZE(all_nxm_fields)]; nfi++) { | |
2177 | hmap_insert(&nxm_header_map, &nfi->header_node, | |
899bb63d | 2178 | hash_uint64(nxm_no_len(nfi->nf.header))); |
178742f9 BP |
2179 | hmap_insert(&nxm_name_map, &nfi->name_node, |
2180 | hash_string(nfi->nf.name, 0)); | |
417e7e66 | 2181 | ovs_list_push_back(&nxm_mf_map[nfi->nf.id], &nfi->mf_node); |
178742f9 BP |
2182 | } |
2183 | ovsthread_once_done(&once); | |
2184 | } | |
2185 | } | |
2186 | ||
2187 | static const struct nxm_field * | |
508a9338 | 2188 | nxm_field_by_header(uint64_t header) |
178742f9 BP |
2189 | { |
2190 | const struct nxm_field_index *nfi; | |
899bb63d | 2191 | uint64_t header_no_len; |
178742f9 BP |
2192 | |
2193 | nxm_init(); | |
2194 | if (nxm_hasmask(header)) { | |
2195 | header = nxm_make_exact_header(header); | |
2196 | } | |
2197 | ||
899bb63d JG |
2198 | header_no_len = nxm_no_len(header); |
2199 | ||
2200 | HMAP_FOR_EACH_IN_BUCKET (nfi, header_node, hash_uint64(header_no_len), | |
178742f9 | 2201 | &nxm_header_map) { |
899bb63d JG |
2202 | if (header_no_len == nxm_no_len(nfi->nf.header)) { |
2203 | if (nxm_length(header) == nxm_length(nfi->nf.header) || | |
2204 | mf_from_id(nfi->nf.id)->variable_len) { | |
2205 | return &nfi->nf; | |
2206 | } else { | |
2207 | return NULL; | |
2208 | } | |
178742f9 BP |
2209 | } |
2210 | } | |
2211 | return NULL; | |
2212 | } | |
2213 | ||
2214 | static const struct nxm_field * | |
2215 | nxm_field_by_name(const char *name, size_t len) | |
2216 | { | |
2217 | const struct nxm_field_index *nfi; | |
2218 | ||
2219 | nxm_init(); | |
2220 | HMAP_FOR_EACH_WITH_HASH (nfi, name_node, hash_bytes(name, len, 0), | |
2221 | &nxm_name_map) { | |
2222 | if (strlen(nfi->nf.name) == len && !memcmp(nfi->nf.name, name, len)) { | |
2223 | return &nfi->nf; | |
2224 | } | |
2225 | } | |
2226 | return NULL; | |
2227 | } | |
2228 | ||
2229 | static const struct nxm_field * | |
e6556fe3 | 2230 | nxm_field_by_mf_id(enum mf_field_id id, enum ofp_version version) |
178742f9 | 2231 | { |
e6556fe3 BP |
2232 | const struct nxm_field_index *nfi; |
2233 | const struct nxm_field *f; | |
178742f9 | 2234 | |
178742f9 | 2235 | nxm_init(); |
178742f9 | 2236 | |
e6556fe3 BP |
2237 | f = NULL; |
2238 | LIST_FOR_EACH (nfi, mf_node, &nxm_mf_map[id]) { | |
2239 | if (!f || version >= nfi->nf.version) { | |
2240 | f = &nfi->nf; | |
2241 | } | |
2242 | } | |
2243 | return f; | |
2244 | } |