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064af421 | 1 | /* |
fd6cd1bf | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2017 Nicira, Inc. |
064af421 | 3 | * |
a14bc59f BP |
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: | |
064af421 | 7 | * |
a14bc59f BP |
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. | |
064af421 BP |
15 | */ |
16 | #include <config.h> | |
17 | #include <sys/types.h> | |
18 | #include "flow.h" | |
d31f1109 | 19 | #include <errno.h> |
064af421 | 20 | #include <inttypes.h> |
5cb7a798 | 21 | #include <limits.h> |
064af421 | 22 | #include <netinet/in.h> |
d31f1109 JP |
23 | #include <netinet/icmp6.h> |
24 | #include <netinet/ip6.h> | |
5cb7a798 | 25 | #include <stdint.h> |
064af421 BP |
26 | #include <stdlib.h> |
27 | #include <string.h> | |
10a24935 | 28 | #include "byte-order.h" |
0deec6d2 | 29 | #include "colors.h" |
064af421 | 30 | #include "coverage.h" |
dc5a7ce7 | 31 | #include "csum.h" |
3e8a2ad1 | 32 | #include "openvswitch/dynamic-string.h" |
064af421 | 33 | #include "hash.h" |
c49d1dd1 | 34 | #include "jhash.h" |
e29747e4 | 35 | #include "openvswitch/match.h" |
cf62fa4c | 36 | #include "dp-packet.h" |
064af421 | 37 | #include "openflow/openflow.h" |
064af421 | 38 | #include "packets.h" |
b5e7e61a | 39 | #include "odp-util.h" |
94639963 | 40 | #include "random.h" |
176aaa65 | 41 | #include "unaligned.h" |
ee89ea7b | 42 | #include "util.h" |
064af421 | 43 | |
d76f09ea | 44 | COVERAGE_DEFINE(flow_extract); |
5cb7a798 | 45 | COVERAGE_DEFINE(miniflow_malloc); |
d76f09ea | 46 | |
d70e8c28 JR |
47 | /* U64 indices for segmented flow classification. */ |
48 | const uint8_t flow_segment_u64s[4] = { | |
49 | FLOW_SEGMENT_1_ENDS_AT / sizeof(uint64_t), | |
50 | FLOW_SEGMENT_2_ENDS_AT / sizeof(uint64_t), | |
51 | FLOW_SEGMENT_3_ENDS_AT / sizeof(uint64_t), | |
52 | FLOW_U64S | |
476f36e8 JR |
53 | }; |
54 | ||
f0fb825a EG |
55 | int flow_vlan_limit = FLOW_MAX_VLAN_HEADERS; |
56 | ||
268eca11 BP |
57 | /* Asserts that field 'f1' follows immediately after 'f0' in struct flow, |
58 | * without any intervening padding. */ | |
59 | #define ASSERT_SEQUENTIAL(f0, f1) \ | |
60 | BUILD_ASSERT_DECL(offsetof(struct flow, f0) \ | |
61 | + MEMBER_SIZEOF(struct flow, f0) \ | |
62 | == offsetof(struct flow, f1)) | |
63 | ||
64 | /* Asserts that fields 'f0' and 'f1' are in the same 32-bit aligned word within | |
65 | * struct flow. */ | |
66 | #define ASSERT_SAME_WORD(f0, f1) \ | |
67 | BUILD_ASSERT_DECL(offsetof(struct flow, f0) / 4 \ | |
68 | == offsetof(struct flow, f1) / 4) | |
69 | ||
70 | /* Asserts that 'f0' and 'f1' are both sequential and within the same 32-bit | |
71 | * aligned word in struct flow. */ | |
72 | #define ASSERT_SEQUENTIAL_SAME_WORD(f0, f1) \ | |
73 | ASSERT_SEQUENTIAL(f0, f1); \ | |
74 | ASSERT_SAME_WORD(f0, f1) | |
75 | ||
419681da JR |
76 | /* miniflow_extract() assumes the following to be true to optimize the |
77 | * extraction process. */ | |
268eca11 BP |
78 | ASSERT_SEQUENTIAL_SAME_WORD(nw_frag, nw_tos); |
79 | ASSERT_SEQUENTIAL_SAME_WORD(nw_tos, nw_ttl); | |
80 | ASSERT_SEQUENTIAL_SAME_WORD(nw_ttl, nw_proto); | |
419681da | 81 | |
d70e8c28 JR |
82 | /* TCP flags in the middle of a BE64, zeroes in the other half. */ |
83 | BUILD_ASSERT_DECL(offsetof(struct flow, tcp_flags) % 8 == 4); | |
84 | ||
419681da JR |
85 | #if WORDS_BIGENDIAN |
86 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl) \ | |
87 | << 16) | |
88 | #else | |
89 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl)) | |
90 | #endif | |
91 | ||
268eca11 | 92 | ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst); |
419681da JR |
93 | |
94 | /* Removes 'size' bytes from the head end of '*datap', of size '*sizep', which | |
95 | * must contain at least 'size' bytes of data. Returns the first byte of data | |
96 | * removed. */ | |
97 | static inline const void * | |
4c0e587c | 98 | data_pull(const void **datap, size_t *sizep, size_t size) |
a26ef517 | 99 | { |
4c0e587c | 100 | const char *data = *datap; |
419681da JR |
101 | *datap = data + size; |
102 | *sizep -= size; | |
103 | return data; | |
a26ef517 JP |
104 | } |
105 | ||
419681da JR |
106 | /* If '*datap' has at least 'size' bytes of data, removes that many bytes from |
107 | * the head end of '*datap' and returns the first byte removed. Otherwise, | |
108 | * returns a null pointer without modifying '*datap'. */ | |
109 | static inline const void * | |
4c0e587c | 110 | data_try_pull(const void **datap, size_t *sizep, size_t size) |
064af421 | 111 | { |
419681da | 112 | return OVS_LIKELY(*sizep >= size) ? data_pull(datap, sizep, size) : NULL; |
064af421 BP |
113 | } |
114 | ||
419681da JR |
115 | /* Context for pushing data to a miniflow. */ |
116 | struct mf_ctx { | |
5fcff47b | 117 | struct flowmap map; |
d70e8c28 JR |
118 | uint64_t *data; |
119 | uint64_t * const end; | |
419681da | 120 | }; |
064af421 | 121 | |
419681da JR |
122 | /* miniflow_push_* macros allow filling in a miniflow data values in order. |
123 | * Assertions are needed only when the layout of the struct flow is modified. | |
124 | * 'ofs' is a compile-time constant, which allows most of the code be optimized | |
694ffecc | 125 | * away. Some GCC versions gave warnings on ALWAYS_INLINE, so these are |
419681da JR |
126 | * defined as macros. */ |
127 | ||
2482b0b0 | 128 | #if (FLOW_WC_SEQ != 39) |
419681da | 129 | #define MINIFLOW_ASSERT(X) ovs_assert(X) |
dce96af8 DDP |
130 | BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime " |
131 | "assertions enabled. Consider updating FLOW_WC_SEQ after " | |
132 | "testing") | |
419681da JR |
133 | #else |
134 | #define MINIFLOW_ASSERT(X) | |
135 | #endif | |
136 | ||
5fcff47b JR |
137 | /* True if 'IDX' and higher bits are not set. */ |
138 | #define ASSERT_FLOWMAP_NOT_SET(FM, IDX) \ | |
c2581ccf | 139 | { \ |
5fcff47b | 140 | MINIFLOW_ASSERT(!((FM)->bits[(IDX) / MAP_T_BITS] & \ |
e807a1a6 | 141 | (MAP_MAX << ((IDX) % MAP_T_BITS)))); \ |
5fcff47b JR |
142 | for (size_t i = (IDX) / MAP_T_BITS + 1; i < FLOWMAP_UNITS; i++) { \ |
143 | MINIFLOW_ASSERT(!(FM)->bits[i]); \ | |
c2581ccf JR |
144 | } \ |
145 | } | |
361d808d | 146 | |
5fcff47b JR |
147 | #define miniflow_set_map(MF, OFS) \ |
148 | { \ | |
149 | ASSERT_FLOWMAP_NOT_SET(&MF.map, (OFS)); \ | |
150 | flowmap_set(&MF.map, (OFS), 1); \ | |
c2581ccf | 151 | } |
361d808d | 152 | |
e807a1a6 SH |
153 | #define miniflow_assert_in_map(MF, OFS) \ |
154 | MINIFLOW_ASSERT(flowmap_is_set(&MF.map, (OFS))); \ | |
5fcff47b JR |
155 | ASSERT_FLOWMAP_NOT_SET(&MF.map, (OFS) + 1) |
156 | ||
157 | #define miniflow_push_uint64_(MF, OFS, VALUE) \ | |
158 | { \ | |
159 | MINIFLOW_ASSERT(MF.data < MF.end && (OFS) % 8 == 0); \ | |
160 | *MF.data++ = VALUE; \ | |
161 | miniflow_set_map(MF, OFS / 8); \ | |
d31f1109 JP |
162 | } |
163 | ||
5fcff47b | 164 | #define miniflow_push_be64_(MF, OFS, VALUE) \ |
d70e8c28 | 165 | miniflow_push_uint64_(MF, OFS, (OVS_FORCE uint64_t)(VALUE)) |
419681da | 166 | |
5fcff47b JR |
167 | #define miniflow_push_uint32_(MF, OFS, VALUE) \ |
168 | { \ | |
169 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
170 | \ | |
171 | if ((OFS) % 8 == 0) { \ | |
172 | miniflow_set_map(MF, OFS / 8); \ | |
173 | *(uint32_t *)MF.data = VALUE; \ | |
174 | } else if ((OFS) % 8 == 4) { \ | |
175 | miniflow_assert_in_map(MF, OFS / 8); \ | |
176 | *((uint32_t *)MF.data + 1) = VALUE; \ | |
177 | MF.data++; \ | |
178 | } \ | |
d70e8c28 JR |
179 | } |
180 | ||
181 | #define miniflow_push_be32_(MF, OFS, VALUE) \ | |
182 | miniflow_push_uint32_(MF, OFS, (OVS_FORCE uint32_t)(VALUE)) | |
183 | ||
5fcff47b JR |
184 | #define miniflow_push_uint16_(MF, OFS, VALUE) \ |
185 | { \ | |
186 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
187 | \ | |
188 | if ((OFS) % 8 == 0) { \ | |
189 | miniflow_set_map(MF, OFS / 8); \ | |
190 | *(uint16_t *)MF.data = VALUE; \ | |
191 | } else if ((OFS) % 8 == 2) { \ | |
192 | miniflow_assert_in_map(MF, OFS / 8); \ | |
193 | *((uint16_t *)MF.data + 1) = VALUE; \ | |
194 | } else if ((OFS) % 8 == 4) { \ | |
195 | miniflow_assert_in_map(MF, OFS / 8); \ | |
196 | *((uint16_t *)MF.data + 2) = VALUE; \ | |
197 | } else if ((OFS) % 8 == 6) { \ | |
198 | miniflow_assert_in_map(MF, OFS / 8); \ | |
199 | *((uint16_t *)MF.data + 3) = VALUE; \ | |
200 | MF.data++; \ | |
201 | } \ | |
202 | } | |
203 | ||
1dcf9ac7 SH |
204 | #define miniflow_push_uint8_(MF, OFS, VALUE) \ |
205 | { \ | |
206 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
207 | \ | |
208 | if ((OFS) % 8 == 0) { \ | |
209 | miniflow_set_map(MF, OFS / 8); \ | |
210 | *(uint8_t *)MF.data = VALUE; \ | |
211 | } else if ((OFS) % 8 == 7) { \ | |
212 | miniflow_assert_in_map(MF, OFS / 8); \ | |
213 | *((uint8_t *)MF.data + 7) = VALUE; \ | |
214 | MF.data++; \ | |
215 | } else { \ | |
216 | miniflow_assert_in_map(MF, OFS / 8); \ | |
217 | *((uint8_t *)MF.data + ((OFS) % 8)) = VALUE; \ | |
218 | } \ | |
219 | } | |
220 | ||
5fcff47b JR |
221 | #define miniflow_pad_to_64_(MF, OFS) \ |
222 | { \ | |
223 | MINIFLOW_ASSERT((OFS) % 8 != 0); \ | |
224 | miniflow_assert_in_map(MF, OFS / 8); \ | |
225 | \ | |
226 | memset((uint8_t *)MF.data + (OFS) % 8, 0, 8 - (OFS) % 8); \ | |
227 | MF.data++; \ | |
d70e8c28 JR |
228 | } |
229 | ||
1589ee5a SH |
230 | #define miniflow_pad_from_64_(MF, OFS) \ |
231 | { \ | |
232 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
233 | \ | |
234 | MINIFLOW_ASSERT((OFS) % 8 != 0); \ | |
235 | miniflow_set_map(MF, OFS / 8); \ | |
236 | \ | |
237 | memset((uint8_t *)MF.data, 0, (OFS) % 8); \ | |
238 | } | |
239 | ||
d70e8c28 | 240 | #define miniflow_push_be16_(MF, OFS, VALUE) \ |
419681da JR |
241 | miniflow_push_uint16_(MF, OFS, (OVS_FORCE uint16_t)VALUE); |
242 | ||
1dcf9ac7 SH |
243 | #define miniflow_push_be8_(MF, OFS, VALUE) \ |
244 | miniflow_push_uint8_(MF, OFS, (OVS_FORCE uint8_t)VALUE); | |
245 | ||
5fcff47b JR |
246 | #define miniflow_set_maps(MF, OFS, N_WORDS) \ |
247 | { \ | |
248 | size_t ofs = (OFS); \ | |
249 | size_t n_words = (N_WORDS); \ | |
250 | \ | |
251 | MINIFLOW_ASSERT(n_words && MF.data + n_words <= MF.end); \ | |
252 | ASSERT_FLOWMAP_NOT_SET(&MF.map, ofs); \ | |
253 | flowmap_set(&MF.map, ofs, n_words); \ | |
361d808d JR |
254 | } |
255 | ||
419681da JR |
256 | /* Data at 'valuep' may be unaligned. */ |
257 | #define miniflow_push_words_(MF, OFS, VALUEP, N_WORDS) \ | |
258 | { \ | |
361d808d JR |
259 | MINIFLOW_ASSERT((OFS) % 8 == 0); \ |
260 | miniflow_set_maps(MF, (OFS) / 8, (N_WORDS)); \ | |
261 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof *MF.data); \ | |
262 | MF.data += (N_WORDS); \ | |
064af421 BP |
263 | } |
264 | ||
d70e8c28 JR |
265 | /* Push 32-bit words padded to 64-bits. */ |
266 | #define miniflow_push_words_32_(MF, OFS, VALUEP, N_WORDS) \ | |
267 | { \ | |
361d808d | 268 | miniflow_set_maps(MF, (OFS) / 8, DIV_ROUND_UP(N_WORDS, 2)); \ |
d70e8c28 JR |
269 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof(uint32_t)); \ |
270 | MF.data += DIV_ROUND_UP(N_WORDS, 2); \ | |
d70e8c28 JR |
271 | if ((N_WORDS) & 1) { \ |
272 | *((uint32_t *)MF.data - 1) = 0; \ | |
273 | } \ | |
274 | } | |
50f06e16 | 275 | |
d70e8c28 JR |
276 | /* Data at 'valuep' may be unaligned. */ |
277 | /* MACs start 64-aligned, and must be followed by other data or padding. */ | |
278 | #define miniflow_push_macs_(MF, OFS, VALUEP) \ | |
279 | { \ | |
361d808d | 280 | miniflow_set_maps(MF, (OFS) / 8, 2); \ |
d70e8c28 JR |
281 | memcpy(MF.data, (VALUEP), 2 * ETH_ADDR_LEN); \ |
282 | MF.data += 1; /* First word only. */ \ | |
d70e8c28 | 283 | } |
50f06e16 | 284 | |
d70e8c28 JR |
285 | #define miniflow_push_uint32(MF, FIELD, VALUE) \ |
286 | miniflow_push_uint32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 287 | |
d70e8c28 JR |
288 | #define miniflow_push_be32(MF, FIELD, VALUE) \ |
289 | miniflow_push_be32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 290 | |
d70e8c28 | 291 | #define miniflow_push_uint16(MF, FIELD, VALUE) \ |
419681da | 292 | miniflow_push_uint16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 293 | |
d70e8c28 | 294 | #define miniflow_push_be16(MF, FIELD, VALUE) \ |
419681da | 295 | miniflow_push_be16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 296 | |
1dcf9ac7 SH |
297 | #define miniflow_push_uint8(MF, FIELD, VALUE) \ |
298 | miniflow_push_uint8_(MF, offsetof(struct flow, FIELD), VALUE) | |
299 | ||
d70e8c28 | 300 | #define miniflow_pad_to_64(MF, FIELD) \ |
06f41fc4 | 301 | miniflow_pad_to_64_(MF, OFFSETOFEND(struct flow, FIELD)) |
d70e8c28 | 302 | |
1589ee5a SH |
303 | #define miniflow_pad_from_64(MF, FIELD) \ |
304 | miniflow_pad_from_64_(MF, offsetof(struct flow, FIELD)) | |
305 | ||
419681da JR |
306 | #define miniflow_push_words(MF, FIELD, VALUEP, N_WORDS) \ |
307 | miniflow_push_words_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
064af421 | 308 | |
d70e8c28 JR |
309 | #define miniflow_push_words_32(MF, FIELD, VALUEP, N_WORDS) \ |
310 | miniflow_push_words_32_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
311 | ||
312 | #define miniflow_push_macs(MF, FIELD, VALUEP) \ | |
313 | miniflow_push_macs_(MF, offsetof(struct flow, FIELD), VALUEP) | |
314 | ||
daf4d3c1 JR |
315 | /* Return the pointer to the miniflow data when called BEFORE the corresponding |
316 | * push. */ | |
317 | #define miniflow_pointer(MF, FIELD) \ | |
318 | (void *)((uint8_t *)MF.data + ((offsetof(struct flow, FIELD)) % 8)) | |
319 | ||
419681da JR |
320 | /* Pulls the MPLS headers at '*datap' and returns the count of them. */ |
321 | static inline int | |
4c0e587c | 322 | parse_mpls(const void **datap, size_t *sizep) |
d31f1109 | 323 | { |
419681da JR |
324 | const struct mpls_hdr *mh; |
325 | int count = 0; | |
d31f1109 | 326 | |
419681da JR |
327 | while ((mh = data_try_pull(datap, sizep, sizeof *mh))) { |
328 | count++; | |
329 | if (mh->mpls_lse.lo & htons(1 << MPLS_BOS_SHIFT)) { | |
d31f1109 JP |
330 | break; |
331 | } | |
419681da | 332 | } |
ba8561c6 | 333 | return MIN(count, FLOW_MAX_MPLS_LABELS); |
419681da | 334 | } |
d31f1109 | 335 | |
f0fb825a EG |
336 | /* passed vlan_hdrs arg must be at least size FLOW_MAX_VLAN_HEADERS. */ |
337 | static inline ALWAYS_INLINE size_t | |
338 | parse_vlan(const void **datap, size_t *sizep, union flow_vlan_hdr *vlan_hdrs) | |
419681da | 339 | { |
f0fb825a | 340 | const ovs_be16 *eth_type; |
d31f1109 | 341 | |
f0fb825a | 342 | memset(vlan_hdrs, 0, sizeof(union flow_vlan_hdr) * FLOW_MAX_VLAN_HEADERS); |
419681da | 343 | data_pull(datap, sizep, ETH_ADDR_LEN * 2); |
d31f1109 | 344 | |
f0fb825a EG |
345 | eth_type = *datap; |
346 | ||
347 | size_t n; | |
348 | for (n = 0; eth_type_vlan(*eth_type) && n < flow_vlan_limit; n++) { | |
349 | if (OVS_UNLIKELY(*sizep < sizeof(ovs_be32) + sizeof(ovs_be16))) { | |
350 | break; | |
d31f1109 | 351 | } |
f0fb825a EG |
352 | |
353 | const ovs_16aligned_be32 *qp = data_pull(datap, sizep, sizeof *qp); | |
354 | vlan_hdrs[n].qtag = get_16aligned_be32(qp); | |
355 | vlan_hdrs[n].tci |= htons(VLAN_CFI); | |
356 | eth_type = *datap; | |
d31f1109 | 357 | } |
f0fb825a | 358 | return n; |
d31f1109 JP |
359 | } |
360 | ||
206b60d4 | 361 | static inline ALWAYS_INLINE ovs_be16 |
4c0e587c | 362 | parse_ethertype(const void **datap, size_t *sizep) |
88366484 | 363 | { |
419681da JR |
364 | const struct llc_snap_header *llc; |
365 | ovs_be16 proto; | |
5a51b2cd | 366 | |
419681da JR |
367 | proto = *(ovs_be16 *) data_pull(datap, sizep, sizeof proto); |
368 | if (OVS_LIKELY(ntohs(proto) >= ETH_TYPE_MIN)) { | |
369 | return proto; | |
88366484 | 370 | } |
5a51b2cd | 371 | |
419681da JR |
372 | if (OVS_UNLIKELY(*sizep < sizeof *llc)) { |
373 | return htons(FLOW_DL_TYPE_NONE); | |
88366484 | 374 | } |
5a51b2cd | 375 | |
419681da JR |
376 | llc = *datap; |
377 | if (OVS_UNLIKELY(llc->llc.llc_dsap != LLC_DSAP_SNAP | |
378 | || llc->llc.llc_ssap != LLC_SSAP_SNAP | |
379 | || llc->llc.llc_cntl != LLC_CNTL_SNAP | |
380 | || memcmp(llc->snap.snap_org, SNAP_ORG_ETHERNET, | |
381 | sizeof llc->snap.snap_org))) { | |
382 | return htons(FLOW_DL_TYPE_NONE); | |
c6bcb685 | 383 | } |
c6bcb685 | 384 | |
419681da | 385 | data_pull(datap, sizep, sizeof *llc); |
685a51a5 | 386 | |
419681da JR |
387 | if (OVS_LIKELY(ntohs(llc->snap.snap_type) >= ETH_TYPE_MIN)) { |
388 | return llc->snap.snap_type; | |
685a51a5 JP |
389 | } |
390 | ||
419681da JR |
391 | return htons(FLOW_DL_TYPE_NONE); |
392 | } | |
685a51a5 | 393 | |
daf4d3c1 JR |
394 | /* Returns 'true' if the packet is an ND packet. In that case the '*nd_target' |
395 | * and 'arp_buf[]' are filled in. If the packet is not an ND pacet, 'false' is | |
396 | * returned and no values are filled in on '*nd_target' or 'arp_buf[]'. */ | |
397 | static inline bool | |
4c0e587c | 398 | parse_icmpv6(const void **datap, size_t *sizep, const struct icmp6_hdr *icmp, |
419681da | 399 | const struct in6_addr **nd_target, |
74ff3298 | 400 | struct eth_addr arp_buf[2]) |
419681da | 401 | { |
daf4d3c1 JR |
402 | if (icmp->icmp6_code != 0 || |
403 | (icmp->icmp6_type != ND_NEIGHBOR_SOLICIT && | |
404 | icmp->icmp6_type != ND_NEIGHBOR_ADVERT)) { | |
405 | return false; | |
406 | } | |
685a51a5 | 407 | |
daf4d3c1 JR |
408 | arp_buf[0] = eth_addr_zero; |
409 | arp_buf[1] = eth_addr_zero; | |
410 | *nd_target = data_try_pull(datap, sizep, sizeof **nd_target); | |
411 | if (OVS_UNLIKELY(!*nd_target)) { | |
412 | return true; | |
413 | } | |
685a51a5 | 414 | |
daf4d3c1 JR |
415 | while (*sizep >= 8) { |
416 | /* The minimum size of an option is 8 bytes, which also is | |
417 | * the size of Ethernet link-layer options. */ | |
86d46f3c ZKL |
418 | const struct ovs_nd_lla_opt *lla_opt = *datap; |
419 | int opt_len = lla_opt->len * ND_LLA_OPT_LEN; | |
88366484 | 420 | |
daf4d3c1 JR |
421 | if (!opt_len || opt_len > *sizep) { |
422 | return true; | |
423 | } | |
685a51a5 | 424 | |
daf4d3c1 JR |
425 | /* Store the link layer address if the appropriate option is |
426 | * provided. It is considered an error if the same link | |
427 | * layer option is specified twice. */ | |
86d46f3c | 428 | if (lla_opt->type == ND_OPT_SOURCE_LINKADDR && opt_len == 8) { |
daf4d3c1 | 429 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[0]))) { |
86d46f3c | 430 | arp_buf[0] = lla_opt->mac; |
daf4d3c1 JR |
431 | } else { |
432 | goto invalid; | |
685a51a5 | 433 | } |
86d46f3c | 434 | } else if (lla_opt->type == ND_OPT_TARGET_LINKADDR && opt_len == 8) { |
daf4d3c1 | 435 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[1]))) { |
86d46f3c | 436 | arp_buf[1] = lla_opt->mac; |
daf4d3c1 JR |
437 | } else { |
438 | goto invalid; | |
685a51a5 | 439 | } |
685a51a5 | 440 | } |
685a51a5 | 441 | |
daf4d3c1 JR |
442 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, opt_len))) { |
443 | return true; | |
444 | } | |
445 | } | |
446 | return true; | |
685a51a5 JP |
447 | |
448 | invalid: | |
cc5dba2f | 449 | *nd_target = NULL; |
74ff3298 JR |
450 | arp_buf[0] = eth_addr_zero; |
451 | arp_buf[1] = eth_addr_zero; | |
daf4d3c1 | 452 | return true; |
685a51a5 JP |
453 | } |
454 | ||
94a81e40 DDP |
455 | static inline bool |
456 | parse_ipv6_ext_hdrs__(const void **datap, size_t *sizep, uint8_t *nw_proto, | |
457 | uint8_t *nw_frag) | |
458 | { | |
459 | while (1) { | |
460 | if (OVS_LIKELY((*nw_proto != IPPROTO_HOPOPTS) | |
461 | && (*nw_proto != IPPROTO_ROUTING) | |
462 | && (*nw_proto != IPPROTO_DSTOPTS) | |
463 | && (*nw_proto != IPPROTO_AH) | |
464 | && (*nw_proto != IPPROTO_FRAGMENT))) { | |
465 | /* It's either a terminal header (e.g., TCP, UDP) or one we | |
466 | * don't understand. In either case, we're done with the | |
467 | * packet, so use it to fill in 'nw_proto'. */ | |
468 | return true; | |
469 | } | |
470 | ||
471 | /* We only verify that at least 8 bytes of the next header are | |
472 | * available, but many of these headers are longer. Ensure that | |
473 | * accesses within the extension header are within those first 8 | |
474 | * bytes. All extension headers are required to be at least 8 | |
475 | * bytes. */ | |
476 | if (OVS_UNLIKELY(*sizep < 8)) { | |
477 | return false; | |
478 | } | |
479 | ||
480 | if ((*nw_proto == IPPROTO_HOPOPTS) | |
481 | || (*nw_proto == IPPROTO_ROUTING) | |
482 | || (*nw_proto == IPPROTO_DSTOPTS)) { | |
483 | /* These headers, while different, have the fields we care | |
484 | * about in the same location and with the same | |
485 | * interpretation. */ | |
486 | const struct ip6_ext *ext_hdr = *datap; | |
487 | *nw_proto = ext_hdr->ip6e_nxt; | |
488 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, | |
489 | (ext_hdr->ip6e_len + 1) * 8))) { | |
490 | return false; | |
491 | } | |
492 | } else if (*nw_proto == IPPROTO_AH) { | |
493 | /* A standard AH definition isn't available, but the fields | |
494 | * we care about are in the same location as the generic | |
495 | * option header--only the header length is calculated | |
496 | * differently. */ | |
497 | const struct ip6_ext *ext_hdr = *datap; | |
498 | *nw_proto = ext_hdr->ip6e_nxt; | |
499 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, | |
500 | (ext_hdr->ip6e_len + 2) * 4))) { | |
501 | return false; | |
502 | } | |
503 | } else if (*nw_proto == IPPROTO_FRAGMENT) { | |
504 | const struct ovs_16aligned_ip6_frag *frag_hdr = *datap; | |
505 | ||
506 | *nw_proto = frag_hdr->ip6f_nxt; | |
507 | if (!data_try_pull(datap, sizep, sizeof *frag_hdr)) { | |
508 | return false; | |
509 | } | |
510 | ||
511 | /* We only process the first fragment. */ | |
512 | if (frag_hdr->ip6f_offlg != htons(0)) { | |
513 | *nw_frag = FLOW_NW_FRAG_ANY; | |
514 | if ((frag_hdr->ip6f_offlg & IP6F_OFF_MASK) != htons(0)) { | |
515 | *nw_frag |= FLOW_NW_FRAG_LATER; | |
516 | *nw_proto = IPPROTO_FRAGMENT; | |
517 | return true; | |
518 | } | |
519 | } | |
520 | } | |
521 | } | |
522 | } | |
523 | ||
524 | bool | |
525 | parse_ipv6_ext_hdrs(const void **datap, size_t *sizep, uint8_t *nw_proto, | |
526 | uint8_t *nw_frag) | |
527 | { | |
528 | return parse_ipv6_ext_hdrs__(datap, sizep, nw_proto, nw_frag); | |
529 | } | |
530 | ||
2482b0b0 JS |
531 | /* Initializes 'flow' members from 'packet' and 'md', taking the packet type |
532 | * into account. | |
deedf7e7 | 533 | * |
2482b0b0 | 534 | * Initializes the layer offsets as follows: |
ca78c6b6 | 535 | * |
2482b0b0 JS |
536 | * - packet->l2_5_ofs to the |
537 | * * the start of the MPLS shim header. Can be zero, if the | |
538 | * packet is of type (OFPHTN_ETHERTYPE, ETH_TYPE_MPLS). | |
539 | * * UINT16_MAX when there is no MPLS shim header. | |
ca78c6b6 | 540 | * |
2482b0b0 JS |
541 | * - packet->l3_ofs is set to |
542 | * * zero if the packet_type is in name space OFPHTN_ETHERTYPE | |
543 | * and there is no MPLS shim header. | |
544 | * * just past the Ethernet header, or just past the vlan_header if | |
545 | * one is present, to the first byte of the payload of the | |
546 | * Ethernet frame if the packet type is Ethernet and there is | |
547 | * no MPLS shim header. | |
548 | * * just past the MPLS label stack to the first byte of the MPLS | |
549 | * payload if there is at least one MPLS shim header. | |
550 | * * UINT16_MAX if the packet type is Ethernet and the frame is | |
551 | * too short to contain an Ethernet header. | |
ca78c6b6 | 552 | * |
2482b0b0 JS |
553 | * - packet->l4_ofs is set to just past the IPv4 or IPv6 header, if one is |
554 | * present and the packet has at least the content used for the fields | |
555 | * of interest for the flow, otherwise UINT16_MAX. | |
ca78c6b6 | 556 | */ |
7257b535 | 557 | void |
cf62fa4c | 558 | flow_extract(struct dp_packet *packet, struct flow *flow) |
064af421 | 559 | { |
27bbe15d JR |
560 | struct { |
561 | struct miniflow mf; | |
d70e8c28 | 562 | uint64_t buf[FLOW_U64S]; |
27bbe15d | 563 | } m; |
064af421 BP |
564 | |
565 | COVERAGE_INC(flow_extract); | |
566 | ||
cf62fa4c | 567 | miniflow_extract(packet, &m.mf); |
27bbe15d | 568 | miniflow_expand(&m.mf, flow); |
419681da | 569 | } |
296e07ac | 570 | |
27bbe15d | 571 | /* Caller is responsible for initializing 'dst' with enough storage for |
d70e8c28 | 572 | * FLOW_U64S * 8 bytes. */ |
419681da | 573 | void |
cf62fa4c | 574 | miniflow_extract(struct dp_packet *packet, struct miniflow *dst) |
419681da | 575 | { |
cf62fa4c | 576 | const struct pkt_metadata *md = &packet->md; |
4c0e587c | 577 | const void *data = dp_packet_data(packet); |
cf62fa4c | 578 | size_t size = dp_packet_size(packet); |
2482b0b0 | 579 | ovs_be32 packet_type = packet->packet_type; |
09b0fa9c | 580 | uint64_t *values = miniflow_values(dst); |
5fcff47b JR |
581 | struct mf_ctx mf = { FLOWMAP_EMPTY_INITIALIZER, values, |
582 | values + FLOW_U64S }; | |
2482b0b0 JS |
583 | const char *frame; |
584 | ovs_be16 dl_type = OVS_BE16_MAX; | |
419681da | 585 | uint8_t nw_frag, nw_tos, nw_ttl, nw_proto; |
daf4d3c1 JR |
586 | uint8_t *ct_nw_proto_p = NULL; |
587 | ovs_be16 ct_tp_src = 0, ct_tp_dst = 0; | |
419681da JR |
588 | |
589 | /* Metadata. */ | |
ffe4c74f | 590 | if (flow_tnl_dst_is_set(&md->tunnel)) { |
cf62fa4c | 591 | miniflow_push_words(mf, tunnel, &md->tunnel, |
9ad11dbe JG |
592 | offsetof(struct flow_tnl, metadata) / |
593 | sizeof(uint64_t)); | |
6728d578 JG |
594 | |
595 | if (!(md->tunnel.flags & FLOW_TNL_F_UDPIF)) { | |
596 | if (md->tunnel.metadata.present.map) { | |
597 | miniflow_push_words(mf, tunnel.metadata, &md->tunnel.metadata, | |
598 | sizeof md->tunnel.metadata / | |
599 | sizeof(uint64_t)); | |
600 | } | |
601 | } else { | |
602 | if (md->tunnel.metadata.present.len) { | |
603 | miniflow_push_words(mf, tunnel.metadata.present, | |
604 | &md->tunnel.metadata.present, 1); | |
605 | miniflow_push_words(mf, tunnel.metadata.opts.gnv, | |
606 | md->tunnel.metadata.opts.gnv, | |
607 | DIV_ROUND_UP(md->tunnel.metadata.present.len, | |
608 | sizeof(uint64_t))); | |
609 | } | |
9ad11dbe | 610 | } |
cf62fa4c PS |
611 | } |
612 | if (md->skb_priority || md->pkt_mark) { | |
613 | miniflow_push_uint32(mf, skb_priority, md->skb_priority); | |
614 | miniflow_push_uint32(mf, pkt_mark, md->pkt_mark); | |
615 | } | |
616 | miniflow_push_uint32(mf, dp_hash, md->dp_hash); | |
617 | miniflow_push_uint32(mf, in_port, odp_to_u32(md->in_port.odp_port)); | |
6cf5c521 | 618 | if (md->ct_state) { |
cf62fa4c | 619 | miniflow_push_uint32(mf, recirc_id, md->recirc_id); |
2a28ccc8 | 620 | miniflow_push_uint8(mf, ct_state, md->ct_state); |
daf4d3c1 JR |
621 | ct_nw_proto_p = miniflow_pointer(mf, ct_nw_proto); |
622 | miniflow_push_uint8(mf, ct_nw_proto, 0); | |
07659514 | 623 | miniflow_push_uint16(mf, ct_zone, md->ct_zone); |
6cf5c521 DB |
624 | } else if (md->recirc_id) { |
625 | miniflow_push_uint32(mf, recirc_id, md->recirc_id); | |
626 | miniflow_pad_to_64(mf, recirc_id); | |
296e07ac | 627 | } |
064af421 | 628 | |
8e53fe8c JS |
629 | if (md->ct_state) { |
630 | miniflow_push_uint32(mf, ct_mark, md->ct_mark); | |
2482b0b0 | 631 | miniflow_push_be32(mf, packet_type, packet_type); |
9daf2348 | 632 | |
2ff8484b | 633 | if (!ovs_u128_is_zero(md->ct_label)) { |
9daf2348 JS |
634 | miniflow_push_words(mf, ct_label, &md->ct_label, |
635 | sizeof md->ct_label / sizeof(uint64_t)); | |
636 | } | |
2482b0b0 JS |
637 | } else { |
638 | miniflow_pad_from_64(mf, packet_type); | |
639 | miniflow_push_be32(mf, packet_type, packet_type); | |
8e53fe8c JS |
640 | } |
641 | ||
419681da | 642 | /* Initialize packet's layer pointer and offsets. */ |
2482b0b0 | 643 | frame = data; |
82eb5b0a | 644 | dp_packet_reset_offsets(packet); |
064af421 | 645 | |
2482b0b0 JS |
646 | if (packet_type == htonl(PT_ETH)) { |
647 | /* Must have full Ethernet header to proceed. */ | |
648 | if (OVS_UNLIKELY(size < sizeof(struct eth_header))) { | |
649 | goto out; | |
650 | } else { | |
651 | /* Link layer. */ | |
652 | ASSERT_SEQUENTIAL(dl_dst, dl_src); | |
653 | miniflow_push_macs(mf, dl_dst, data); | |
654 | ||
655 | /* VLAN */ | |
656 | union flow_vlan_hdr vlans[FLOW_MAX_VLAN_HEADERS]; | |
657 | size_t num_vlans = parse_vlan(&data, &size, vlans); | |
658 | ||
659 | dl_type = parse_ethertype(&data, &size); | |
660 | miniflow_push_be16(mf, dl_type, dl_type); | |
661 | miniflow_pad_to_64(mf, dl_type); | |
662 | if (num_vlans > 0) { | |
663 | miniflow_push_words_32(mf, vlans, vlans, num_vlans); | |
664 | } | |
f0fb825a | 665 | |
2482b0b0 JS |
666 | } |
667 | } else { | |
668 | /* Take dl_type from packet_type. */ | |
669 | dl_type = pt_ns_type_be(packet_type); | |
670 | miniflow_pad_from_64(mf, dl_type); | |
419681da | 671 | miniflow_push_be16(mf, dl_type, dl_type); |
2482b0b0 | 672 | /* Do not push vlan_tci, pad instead */ |
f0fb825a | 673 | miniflow_pad_to_64(mf, dl_type); |
50f06e16 | 674 | } |
50f06e16 | 675 | |
419681da JR |
676 | /* Parse mpls. */ |
677 | if (OVS_UNLIKELY(eth_type_mpls(dl_type))) { | |
678 | int count; | |
679 | const void *mpls = data; | |
680 | ||
2482b0b0 | 681 | packet->l2_5_ofs = (char *)data - frame; |
419681da | 682 | count = parse_mpls(&data, &size); |
d70e8c28 | 683 | miniflow_push_words_32(mf, mpls_lse, mpls, count); |
b02475c5 SH |
684 | } |
685 | ||
ad128cc1 | 686 | /* Network layer. */ |
2482b0b0 | 687 | packet->l3_ofs = (char *)data - frame; |
419681da JR |
688 | |
689 | nw_frag = 0; | |
690 | if (OVS_LIKELY(dl_type == htons(ETH_TYPE_IP))) { | |
691 | const struct ip_header *nh = data; | |
692 | int ip_len; | |
fa8d9001 | 693 | uint16_t tot_len; |
419681da JR |
694 | |
695 | if (OVS_UNLIKELY(size < IP_HEADER_LEN)) { | |
696 | goto out; | |
697 | } | |
698 | ip_len = IP_IHL(nh->ip_ihl_ver) * 4; | |
699 | ||
700 | if (OVS_UNLIKELY(ip_len < IP_HEADER_LEN)) { | |
701 | goto out; | |
702 | } | |
fa8d9001 JR |
703 | if (OVS_UNLIKELY(size < ip_len)) { |
704 | goto out; | |
705 | } | |
706 | tot_len = ntohs(nh->ip_tot_len); | |
5b2cdc3f | 707 | if (OVS_UNLIKELY(tot_len > size || ip_len > tot_len)) { |
fa8d9001 JR |
708 | goto out; |
709 | } | |
710 | if (OVS_UNLIKELY(size - tot_len > UINT8_MAX)) { | |
711 | goto out; | |
712 | } | |
cf62fa4c | 713 | dp_packet_set_l2_pad_size(packet, size - tot_len); |
fa8d9001 | 714 | size = tot_len; /* Never pull padding. */ |
419681da JR |
715 | |
716 | /* Push both source and destination address at once. */ | |
d70e8c28 | 717 | miniflow_push_words(mf, nw_src, &nh->ip_src, 1); |
daf4d3c1 JR |
718 | if (ct_nw_proto_p && !md->ct_orig_tuple_ipv6) { |
719 | *ct_nw_proto_p = md->ct_orig_tuple.ipv4.ipv4_proto; | |
720 | if (*ct_nw_proto_p) { | |
721 | miniflow_push_words(mf, ct_nw_src, | |
722 | &md->ct_orig_tuple.ipv4.ipv4_src, 1); | |
723 | ct_tp_src = md->ct_orig_tuple.ipv4.src_port; | |
724 | ct_tp_dst = md->ct_orig_tuple.ipv4.dst_port; | |
725 | } | |
726 | } | |
d70e8c28 JR |
727 | |
728 | miniflow_push_be32(mf, ipv6_label, 0); /* Padding for IPv4. */ | |
419681da JR |
729 | |
730 | nw_tos = nh->ip_tos; | |
731 | nw_ttl = nh->ip_ttl; | |
732 | nw_proto = nh->ip_proto; | |
733 | if (OVS_UNLIKELY(IP_IS_FRAGMENT(nh->ip_frag_off))) { | |
734 | nw_frag = FLOW_NW_FRAG_ANY; | |
735 | if (nh->ip_frag_off & htons(IP_FRAG_OFF_MASK)) { | |
736 | nw_frag |= FLOW_NW_FRAG_LATER; | |
737 | } | |
738 | } | |
419681da | 739 | data_pull(&data, &size, ip_len); |
419681da JR |
740 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { |
741 | const struct ovs_16aligned_ip6_hdr *nh; | |
742 | ovs_be32 tc_flow; | |
fa8d9001 | 743 | uint16_t plen; |
419681da JR |
744 | |
745 | if (OVS_UNLIKELY(size < sizeof *nh)) { | |
746 | goto out; | |
747 | } | |
748 | nh = data_pull(&data, &size, sizeof *nh); | |
749 | ||
fa8d9001 JR |
750 | plen = ntohs(nh->ip6_plen); |
751 | if (OVS_UNLIKELY(plen > size)) { | |
752 | goto out; | |
753 | } | |
754 | /* Jumbo Payload option not supported yet. */ | |
755 | if (OVS_UNLIKELY(size - plen > UINT8_MAX)) { | |
756 | goto out; | |
757 | } | |
cf62fa4c | 758 | dp_packet_set_l2_pad_size(packet, size - plen); |
fa8d9001 JR |
759 | size = plen; /* Never pull padding. */ |
760 | ||
419681da | 761 | miniflow_push_words(mf, ipv6_src, &nh->ip6_src, |
d70e8c28 | 762 | sizeof nh->ip6_src / 8); |
419681da | 763 | miniflow_push_words(mf, ipv6_dst, &nh->ip6_dst, |
d70e8c28 | 764 | sizeof nh->ip6_dst / 8); |
daf4d3c1 JR |
765 | if (ct_nw_proto_p && md->ct_orig_tuple_ipv6) { |
766 | *ct_nw_proto_p = md->ct_orig_tuple.ipv6.ipv6_proto; | |
767 | if (*ct_nw_proto_p) { | |
768 | miniflow_push_words(mf, ct_ipv6_src, | |
769 | &md->ct_orig_tuple.ipv6.ipv6_src, | |
770 | 2 * | |
771 | sizeof md->ct_orig_tuple.ipv6.ipv6_src / 8); | |
772 | ct_tp_src = md->ct_orig_tuple.ipv6.src_port; | |
773 | ct_tp_dst = md->ct_orig_tuple.ipv6.dst_port; | |
774 | } | |
775 | } | |
419681da JR |
776 | |
777 | tc_flow = get_16aligned_be32(&nh->ip6_flow); | |
778 | { | |
779 | ovs_be32 label = tc_flow & htonl(IPV6_LABEL_MASK); | |
d70e8c28 | 780 | miniflow_push_be32(mf, ipv6_label, label); |
419681da JR |
781 | } |
782 | ||
783 | nw_tos = ntohl(tc_flow) >> 20; | |
784 | nw_ttl = nh->ip6_hlim; | |
785 | nw_proto = nh->ip6_nxt; | |
786 | ||
94a81e40 DDP |
787 | if (!parse_ipv6_ext_hdrs__(&data, &size, &nw_proto, &nw_frag)) { |
788 | goto out; | |
50f06e16 | 789 | } |
419681da JR |
790 | } else { |
791 | if (dl_type == htons(ETH_TYPE_ARP) || | |
792 | dl_type == htons(ETH_TYPE_RARP)) { | |
74ff3298 | 793 | struct eth_addr arp_buf[2]; |
419681da JR |
794 | const struct arp_eth_header *arp = (const struct arp_eth_header *) |
795 | data_try_pull(&data, &size, ARP_ETH_HEADER_LEN); | |
796 | ||
797 | if (OVS_LIKELY(arp) && OVS_LIKELY(arp->ar_hrd == htons(1)) | |
798 | && OVS_LIKELY(arp->ar_pro == htons(ETH_TYPE_IP)) | |
799 | && OVS_LIKELY(arp->ar_hln == ETH_ADDR_LEN) | |
800 | && OVS_LIKELY(arp->ar_pln == 4)) { | |
d70e8c28 JR |
801 | miniflow_push_be32(mf, nw_src, |
802 | get_16aligned_be32(&arp->ar_spa)); | |
803 | miniflow_push_be32(mf, nw_dst, | |
804 | get_16aligned_be32(&arp->ar_tpa)); | |
419681da JR |
805 | |
806 | /* We only match on the lower 8 bits of the opcode. */ | |
807 | if (OVS_LIKELY(ntohs(arp->ar_op) <= 0xff)) { | |
d70e8c28 | 808 | miniflow_push_be32(mf, ipv6_label, 0); /* Pad with ARP. */ |
419681da JR |
809 | miniflow_push_be32(mf, nw_frag, htonl(ntohs(arp->ar_op))); |
810 | } | |
d31f1109 | 811 | |
419681da | 812 | /* Must be adjacent. */ |
268eca11 | 813 | ASSERT_SEQUENTIAL(arp_sha, arp_tha); |
419681da | 814 | |
74ff3298 JR |
815 | arp_buf[0] = arp->ar_sha; |
816 | arp_buf[1] = arp->ar_tha; | |
d70e8c28 | 817 | miniflow_push_macs(mf, arp_sha, arp_buf); |
06f41fc4 | 818 | miniflow_pad_to_64(mf, arp_tha); |
419681da | 819 | } |
d31f1109 | 820 | } |
419681da JR |
821 | goto out; |
822 | } | |
823 | ||
2482b0b0 | 824 | packet->l4_ofs = (char *)data - frame; |
419681da | 825 | miniflow_push_be32(mf, nw_frag, |
a13784ba | 826 | bytes_to_be32(nw_frag, nw_tos, nw_ttl, nw_proto)); |
419681da JR |
827 | |
828 | if (OVS_LIKELY(!(nw_frag & FLOW_NW_FRAG_LATER))) { | |
829 | if (OVS_LIKELY(nw_proto == IPPROTO_TCP)) { | |
830 | if (OVS_LIKELY(size >= TCP_HEADER_LEN)) { | |
831 | const struct tcp_header *tcp = data; | |
832 | ||
74ff3298 | 833 | miniflow_push_be32(mf, arp_tha.ea[2], 0); |
419681da JR |
834 | miniflow_push_be32(mf, tcp_flags, |
835 | TCP_FLAGS_BE32(tcp->tcp_ctl)); | |
115f2481 JR |
836 | miniflow_push_be16(mf, tp_src, tcp->tcp_src); |
837 | miniflow_push_be16(mf, tp_dst, tcp->tcp_dst); | |
daf4d3c1 JR |
838 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
839 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da JR |
840 | } |
841 | } else if (OVS_LIKELY(nw_proto == IPPROTO_UDP)) { | |
842 | if (OVS_LIKELY(size >= UDP_HEADER_LEN)) { | |
843 | const struct udp_header *udp = data; | |
844 | ||
115f2481 JR |
845 | miniflow_push_be16(mf, tp_src, udp->udp_src); |
846 | miniflow_push_be16(mf, tp_dst, udp->udp_dst); | |
daf4d3c1 JR |
847 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
848 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
064af421 | 849 | } |
419681da JR |
850 | } else if (OVS_LIKELY(nw_proto == IPPROTO_SCTP)) { |
851 | if (OVS_LIKELY(size >= SCTP_HEADER_LEN)) { | |
852 | const struct sctp_header *sctp = data; | |
a26ef517 | 853 | |
115f2481 JR |
854 | miniflow_push_be16(mf, tp_src, sctp->sctp_src); |
855 | miniflow_push_be16(mf, tp_dst, sctp->sctp_dst); | |
daf4d3c1 JR |
856 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
857 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da JR |
858 | } |
859 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMP)) { | |
860 | if (OVS_LIKELY(size >= ICMP_HEADER_LEN)) { | |
861 | const struct icmp_header *icmp = data; | |
862 | ||
863 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp_type)); | |
864 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp_code)); | |
daf4d3c1 JR |
865 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
866 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da | 867 | } |
0e612675 FL |
868 | } else if (OVS_LIKELY(nw_proto == IPPROTO_IGMP)) { |
869 | if (OVS_LIKELY(size >= IGMP_HEADER_LEN)) { | |
870 | const struct igmp_header *igmp = data; | |
871 | ||
872 | miniflow_push_be16(mf, tp_src, htons(igmp->igmp_type)); | |
873 | miniflow_push_be16(mf, tp_dst, htons(igmp->igmp_code)); | |
daf4d3c1 JR |
874 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
875 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
0e612675 FL |
876 | miniflow_push_be32(mf, igmp_group_ip4, |
877 | get_16aligned_be32(&igmp->group)); | |
daf4d3c1 | 878 | miniflow_pad_to_64(mf, igmp_group_ip4); |
0e612675 | 879 | } |
419681da JR |
880 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMPV6)) { |
881 | if (OVS_LIKELY(size >= sizeof(struct icmp6_hdr))) { | |
daf4d3c1 JR |
882 | const struct in6_addr *nd_target; |
883 | struct eth_addr arp_buf[2]; | |
419681da JR |
884 | const struct icmp6_hdr *icmp = data_pull(&data, &size, |
885 | sizeof *icmp); | |
daf4d3c1 JR |
886 | if (parse_icmpv6(&data, &size, icmp, &nd_target, arp_buf)) { |
887 | if (nd_target) { | |
888 | miniflow_push_words(mf, nd_target, nd_target, | |
889 | sizeof *nd_target / sizeof(uint64_t)); | |
890 | } | |
891 | miniflow_push_macs(mf, arp_sha, arp_buf); | |
892 | miniflow_pad_to_64(mf, arp_tha); | |
893 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp6_type)); | |
894 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp6_code)); | |
895 | miniflow_pad_to_64(mf, tp_dst); | |
896 | } else { | |
897 | /* ICMPv6 but not ND. */ | |
898 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp6_type)); | |
899 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp6_code)); | |
900 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); | |
901 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da JR |
902 | } |
903 | } | |
064af421 BP |
904 | } |
905 | } | |
419681da | 906 | out: |
5fcff47b | 907 | dst->map = mf.map; |
064af421 BP |
908 | } |
909 | ||
206b60d4 DDP |
910 | ovs_be16 |
911 | parse_dl_type(const struct eth_header *data_, size_t size) | |
912 | { | |
913 | const void *data = data_; | |
f0fb825a | 914 | union flow_vlan_hdr vlans[FLOW_MAX_VLAN_HEADERS]; |
206b60d4 | 915 | |
f0fb825a | 916 | parse_vlan(&data, &size, vlans); |
206b60d4 DDP |
917 | |
918 | return parse_ethertype(&data, &size); | |
919 | } | |
920 | ||
993410fb BP |
921 | /* For every bit of a field that is wildcarded in 'wildcards', sets the |
922 | * corresponding bit in 'flow' to zero. */ | |
923 | void | |
924 | flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards) | |
925 | { | |
d70e8c28 JR |
926 | uint64_t *flow_u64 = (uint64_t *) flow; |
927 | const uint64_t *wc_u64 = (const uint64_t *) &wildcards->masks; | |
659c2346 | 928 | size_t i; |
993410fb | 929 | |
d70e8c28 JR |
930 | for (i = 0; i < FLOW_U64S; i++) { |
931 | flow_u64[i] &= wc_u64[i]; | |
26720e24 | 932 | } |
993410fb BP |
933 | } |
934 | ||
d8d9c698 EJ |
935 | void |
936 | flow_unwildcard_tp_ports(const struct flow *flow, struct flow_wildcards *wc) | |
937 | { | |
938 | if (flow->nw_proto != IPPROTO_ICMP) { | |
939 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
940 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
941 | } else { | |
942 | wc->masks.tp_src = htons(0xff); | |
943 | wc->masks.tp_dst = htons(0xff); | |
944 | } | |
945 | } | |
946 | ||
50dcbd8e | 947 | /* Initializes 'flow_metadata' with the metadata found in 'flow'. */ |
5d6c3af0 | 948 | void |
50dcbd8e | 949 | flow_get_metadata(const struct flow *flow, struct match *flow_metadata) |
5d6c3af0 | 950 | { |
50dcbd8e JG |
951 | int i; |
952 | ||
2482b0b0 | 953 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 39); |
e9358af6 | 954 | |
50dcbd8e JG |
955 | match_init_catchall(flow_metadata); |
956 | if (flow->tunnel.tun_id != htonll(0)) { | |
957 | match_set_tun_id(flow_metadata, flow->tunnel.tun_id); | |
958 | } | |
b666962b JG |
959 | if (flow->tunnel.flags & FLOW_TNL_PUB_F_MASK) { |
960 | match_set_tun_flags(flow_metadata, | |
961 | flow->tunnel.flags & FLOW_TNL_PUB_F_MASK); | |
962 | } | |
ffe4c74f | 963 | if (flow->tunnel.ip_src) { |
50dcbd8e JG |
964 | match_set_tun_src(flow_metadata, flow->tunnel.ip_src); |
965 | } | |
ffe4c74f | 966 | if (flow->tunnel.ip_dst) { |
50dcbd8e JG |
967 | match_set_tun_dst(flow_metadata, flow->tunnel.ip_dst); |
968 | } | |
ffe4c74f JB |
969 | if (ipv6_addr_is_set(&flow->tunnel.ipv6_src)) { |
970 | match_set_tun_ipv6_src(flow_metadata, &flow->tunnel.ipv6_src); | |
971 | } | |
972 | if (ipv6_addr_is_set(&flow->tunnel.ipv6_dst)) { | |
973 | match_set_tun_ipv6_dst(flow_metadata, &flow->tunnel.ipv6_dst); | |
974 | } | |
50dcbd8e JG |
975 | if (flow->tunnel.gbp_id != htons(0)) { |
976 | match_set_tun_gbp_id(flow_metadata, flow->tunnel.gbp_id); | |
977 | } | |
978 | if (flow->tunnel.gbp_flags) { | |
979 | match_set_tun_gbp_flags(flow_metadata, flow->tunnel.gbp_flags); | |
980 | } | |
6728d578 | 981 | tun_metadata_get_fmd(&flow->tunnel, flow_metadata); |
50dcbd8e JG |
982 | if (flow->metadata != htonll(0)) { |
983 | match_set_metadata(flow_metadata, flow->metadata); | |
984 | } | |
985 | ||
986 | for (i = 0; i < FLOW_N_REGS; i++) { | |
987 | if (flow->regs[i]) { | |
988 | match_set_reg(flow_metadata, i, flow->regs[i]); | |
989 | } | |
990 | } | |
991 | ||
992 | if (flow->pkt_mark != 0) { | |
993 | match_set_pkt_mark(flow_metadata, flow->pkt_mark); | |
994 | } | |
995 | ||
996 | match_set_in_port(flow_metadata, flow->in_port.ofp_port); | |
6a81043e JS |
997 | if (flow->packet_type != htonl(PT_ETH)) { |
998 | match_set_packet_type(flow_metadata, flow->packet_type); | |
999 | } | |
1000 | ||
07659514 JS |
1001 | if (flow->ct_state != 0) { |
1002 | match_set_ct_state(flow_metadata, flow->ct_state); | |
daf4d3c1 JR |
1003 | if (is_ct_valid(flow, NULL, NULL) && flow->ct_nw_proto != 0) { |
1004 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1005 | match_set_ct_nw_src(flow_metadata, flow->ct_nw_src); | |
1006 | match_set_ct_nw_dst(flow_metadata, flow->ct_nw_dst); | |
1007 | match_set_ct_nw_proto(flow_metadata, flow->ct_nw_proto); | |
1008 | match_set_ct_tp_src(flow_metadata, flow->ct_tp_src); | |
1009 | match_set_ct_tp_dst(flow_metadata, flow->ct_tp_dst); | |
1010 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1011 | match_set_ct_ipv6_src(flow_metadata, &flow->ct_ipv6_src); | |
1012 | match_set_ct_ipv6_dst(flow_metadata, &flow->ct_ipv6_dst); | |
1013 | match_set_ct_nw_proto(flow_metadata, flow->ct_nw_proto); | |
1014 | match_set_ct_tp_src(flow_metadata, flow->ct_tp_src); | |
1015 | match_set_ct_tp_dst(flow_metadata, flow->ct_tp_dst); | |
1016 | } | |
1017 | } | |
07659514 JS |
1018 | } |
1019 | if (flow->ct_zone != 0) { | |
1020 | match_set_ct_zone(flow_metadata, flow->ct_zone); | |
1021 | } | |
8e53fe8c JS |
1022 | if (flow->ct_mark != 0) { |
1023 | match_set_ct_mark(flow_metadata, flow->ct_mark); | |
1024 | } | |
2ff8484b | 1025 | if (!ovs_u128_is_zero(flow->ct_label)) { |
9daf2348 JS |
1026 | match_set_ct_label(flow_metadata, flow->ct_label); |
1027 | } | |
07659514 JS |
1028 | } |
1029 | ||
b02e6cf8 BP |
1030 | const char * |
1031 | ct_state_to_string(uint32_t state) | |
07659514 JS |
1032 | { |
1033 | switch (state) { | |
fd6cd1bf BP |
1034 | #define CS_STATE(ENUM, INDEX, NAME) case CS_##ENUM: return NAME; |
1035 | CS_STATES | |
1036 | #undef CS_STATE | |
07659514 JS |
1037 | default: |
1038 | return NULL; | |
1039 | } | |
5d6c3af0 EJ |
1040 | } |
1041 | ||
b02e6cf8 BP |
1042 | uint32_t |
1043 | ct_state_from_string(const char *s) | |
1044 | { | |
1045 | #define CS_STATE(ENUM, INDEX, NAME) \ | |
1046 | if (!strcmp(s, NAME)) { \ | |
1047 | return CS_##ENUM; \ | |
1048 | } | |
1049 | CS_STATES | |
1050 | #undef CS_STATE | |
1051 | return 0; | |
1052 | } | |
1053 | ||
6846e91e BP |
1054 | /* Clears the fields in 'flow' associated with connection tracking. */ |
1055 | void | |
1056 | flow_clear_conntrack(struct flow *flow) | |
1057 | { | |
1058 | flow->ct_state = 0; | |
1059 | flow->ct_zone = 0; | |
1060 | flow->ct_mark = 0; | |
1061 | flow->ct_label = OVS_U128_ZERO; | |
1062 | ||
1063 | flow->ct_nw_proto = 0; | |
1064 | flow->ct_tp_src = 0; | |
1065 | flow->ct_tp_dst = 0; | |
1066 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1067 | flow->ct_nw_src = 0; | |
1068 | flow->ct_nw_dst = 0; | |
1069 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1070 | memset(&flow->ct_ipv6_src, 0, sizeof flow->ct_ipv6_src); | |
1071 | memset(&flow->ct_ipv6_dst, 0, sizeof flow->ct_ipv6_dst); | |
1072 | } | |
1073 | } | |
1074 | ||
064af421 | 1075 | char * |
50f96b10 BP |
1076 | flow_to_string(const struct flow *flow, |
1077 | const struct ofputil_port_map *port_map) | |
064af421 BP |
1078 | { |
1079 | struct ds ds = DS_EMPTY_INITIALIZER; | |
50f96b10 | 1080 | flow_format(&ds, flow, port_map); |
064af421 BP |
1081 | return ds_cstr(&ds); |
1082 | } | |
1083 | ||
4fe3445a PS |
1084 | const char * |
1085 | flow_tun_flag_to_string(uint32_t flags) | |
1086 | { | |
1087 | switch (flags) { | |
1088 | case FLOW_TNL_F_DONT_FRAGMENT: | |
1089 | return "df"; | |
1090 | case FLOW_TNL_F_CSUM: | |
1091 | return "csum"; | |
1092 | case FLOW_TNL_F_KEY: | |
1093 | return "key"; | |
94872594 JG |
1094 | case FLOW_TNL_F_OAM: |
1095 | return "oam"; | |
4fe3445a PS |
1096 | default: |
1097 | return NULL; | |
1098 | } | |
1099 | } | |
1100 | ||
1101 | void | |
1102 | format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t), | |
1103 | uint32_t flags, char del) | |
1104 | { | |
1105 | uint32_t bad = 0; | |
1106 | ||
1107 | if (!flags) { | |
8e4c1621 | 1108 | ds_put_char(ds, '0'); |
4fe3445a PS |
1109 | return; |
1110 | } | |
1111 | while (flags) { | |
1112 | uint32_t bit = rightmost_1bit(flags); | |
1113 | const char *s; | |
1114 | ||
1115 | s = bit_to_string(bit); | |
1116 | if (s) { | |
1117 | ds_put_format(ds, "%s%c", s, del); | |
1118 | } else { | |
1119 | bad |= bit; | |
1120 | } | |
1121 | ||
1122 | flags &= ~bit; | |
1123 | } | |
1124 | ||
1125 | if (bad) { | |
1126 | ds_put_format(ds, "0x%"PRIx32"%c", bad, del); | |
1127 | } | |
1128 | ds_chomp(ds, del); | |
1129 | } | |
1130 | ||
61bf6666 JR |
1131 | void |
1132 | format_flags_masked(struct ds *ds, const char *name, | |
1133 | const char *(*bit_to_string)(uint32_t), uint32_t flags, | |
8e4c1621 | 1134 | uint32_t mask, uint32_t max_mask) |
61bf6666 JR |
1135 | { |
1136 | if (name) { | |
0deec6d2 | 1137 | ds_put_format(ds, "%s%s=%s", colors.param, name, colors.end); |
61bf6666 | 1138 | } |
8e4c1621 JG |
1139 | |
1140 | if (mask == max_mask) { | |
1141 | format_flags(ds, bit_to_string, flags, '|'); | |
1142 | return; | |
1143 | } | |
1144 | ||
1145 | if (!mask) { | |
1146 | ds_put_cstr(ds, "0/0"); | |
1147 | return; | |
1148 | } | |
1149 | ||
61bf6666 JR |
1150 | while (mask) { |
1151 | uint32_t bit = rightmost_1bit(mask); | |
1152 | const char *s = bit_to_string(bit); | |
1153 | ||
1154 | ds_put_format(ds, "%s%s", (flags & bit) ? "+" : "-", | |
1155 | s ? s : "[Unknown]"); | |
1156 | mask &= ~bit; | |
1157 | } | |
1158 | } | |
1159 | ||
3d4b2e6e JS |
1160 | static void |
1161 | put_u16_masked(struct ds *s, uint16_t value, uint16_t mask) | |
1162 | { | |
1163 | if (!mask) { | |
1164 | ds_put_char(s, '*'); | |
1165 | } else { | |
1166 | if (value > 9) { | |
1167 | ds_put_format(s, "0x%"PRIx16, value); | |
1168 | } else { | |
1169 | ds_put_format(s, "%"PRIu16, value); | |
1170 | } | |
1171 | ||
1172 | if (mask != UINT16_MAX) { | |
1173 | ds_put_format(s, "/0x%"PRIx16, mask); | |
1174 | } | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | void | |
1179 | format_packet_type_masked(struct ds *s, ovs_be32 value, ovs_be32 mask) | |
1180 | { | |
1181 | if (value == htonl(PT_ETH) && mask == OVS_BE32_MAX) { | |
1182 | ds_put_cstr(s, "eth"); | |
1183 | } else { | |
1184 | ds_put_cstr(s, "packet_type=("); | |
1185 | put_u16_masked(s, pt_ns(value), pt_ns(mask)); | |
1186 | ds_put_char(s, ','); | |
1187 | put_u16_masked(s, pt_ns_type(value), pt_ns_type(mask)); | |
1188 | ds_put_char(s, ')'); | |
1189 | } | |
1190 | } | |
1191 | ||
8e4c1621 JG |
1192 | /* Scans a string 's' of flags to determine their numerical value and |
1193 | * returns the number of characters parsed using 'bit_to_string' to | |
1194 | * lookup flag names. Scanning continues until the character 'end' is | |
1195 | * reached. | |
1196 | * | |
1197 | * In the event of a failure, a negative error code will be returned. In | |
1198 | * addition, if 'res_string' is non-NULL then a descriptive string will | |
1199 | * be returned incorporating the identifying string 'field_name'. This | |
1200 | * error string must be freed by the caller. | |
1201 | * | |
1202 | * Upon success, the flag values will be stored in 'res_flags' and | |
1203 | * optionally 'res_mask', if it is non-NULL (if it is NULL then any masks | |
1204 | * present in the original string will be considered an error). The | |
1205 | * caller may restrict the acceptable set of values through the mask | |
1206 | * 'allowed'. */ | |
1207 | int | |
1208 | parse_flags(const char *s, const char *(*bit_to_string)(uint32_t), | |
1209 | char end, const char *field_name, char **res_string, | |
1210 | uint32_t *res_flags, uint32_t allowed, uint32_t *res_mask) | |
1211 | { | |
1212 | uint32_t result = 0; | |
1213 | int n; | |
1214 | ||
1215 | /* Parse masked flags in numeric format? */ | |
1216 | if (res_mask && ovs_scan(s, "%"SCNi32"/%"SCNi32"%n", | |
1217 | res_flags, res_mask, &n) && n > 0) { | |
1218 | if (*res_flags & ~allowed || *res_mask & ~allowed) { | |
1219 | goto unknown; | |
1220 | } | |
1221 | return n; | |
1222 | } | |
1223 | ||
1224 | n = 0; | |
1225 | ||
1226 | if (res_mask && (*s == '+' || *s == '-')) { | |
1227 | uint32_t flags = 0, mask = 0; | |
1228 | ||
1229 | /* Parse masked flags. */ | |
1230 | while (s[0] != end) { | |
1231 | bool set; | |
1232 | uint32_t bit; | |
1233 | size_t len; | |
1234 | ||
1235 | if (s[0] == '+') { | |
1236 | set = true; | |
1237 | } else if (s[0] == '-') { | |
1238 | set = false; | |
1239 | } else { | |
1240 | if (res_string) { | |
1241 | *res_string = xasprintf("%s: %s must be preceded by '+' " | |
1242 | "(for SET) or '-' (NOT SET)", s, | |
1243 | field_name); | |
1244 | } | |
1245 | return -EINVAL; | |
1246 | } | |
1247 | s++; | |
1248 | n++; | |
1249 | ||
1250 | for (bit = 1; bit; bit <<= 1) { | |
1251 | const char *fname = bit_to_string(bit); | |
1252 | ||
1253 | if (!fname) { | |
1254 | continue; | |
1255 | } | |
1256 | ||
1257 | len = strlen(fname); | |
1258 | if (strncmp(s, fname, len) || | |
1259 | (s[len] != '+' && s[len] != '-' && s[len] != end)) { | |
1260 | continue; | |
1261 | } | |
1262 | ||
1263 | if (mask & bit) { | |
1264 | /* bit already set. */ | |
1265 | if (res_string) { | |
1266 | *res_string = xasprintf("%s: Each %s flag can be " | |
1267 | "specified only once", s, | |
1268 | field_name); | |
1269 | } | |
1270 | return -EINVAL; | |
1271 | } | |
1272 | if (!(bit & allowed)) { | |
1273 | goto unknown; | |
1274 | } | |
1275 | if (set) { | |
1276 | flags |= bit; | |
1277 | } | |
1278 | mask |= bit; | |
1279 | break; | |
1280 | } | |
1281 | ||
1282 | if (!bit) { | |
1283 | goto unknown; | |
1284 | } | |
1285 | s += len; | |
1286 | n += len; | |
1287 | } | |
1288 | ||
1289 | *res_flags = flags; | |
1290 | *res_mask = mask; | |
1291 | return n; | |
1292 | } | |
1293 | ||
1294 | /* Parse unmasked flags. If a flag is present, it is set, otherwise | |
1295 | * it is not set. */ | |
1296 | while (s[n] != end) { | |
1297 | unsigned long long int flags; | |
1298 | uint32_t bit; | |
1299 | int n0; | |
1300 | ||
1301 | if (ovs_scan(&s[n], "%lli%n", &flags, &n0)) { | |
1302 | if (flags & ~allowed) { | |
1303 | goto unknown; | |
1304 | } | |
1305 | n += n0 + (s[n + n0] == '|'); | |
1306 | result |= flags; | |
1307 | continue; | |
1308 | } | |
1309 | ||
1310 | for (bit = 1; bit; bit <<= 1) { | |
1311 | const char *name = bit_to_string(bit); | |
1312 | size_t len; | |
1313 | ||
1314 | if (!name) { | |
1315 | continue; | |
1316 | } | |
1317 | ||
1318 | len = strlen(name); | |
1319 | if (!strncmp(s + n, name, len) && | |
1320 | (s[n + len] == '|' || s[n + len] == end)) { | |
1321 | if (!(bit & allowed)) { | |
1322 | goto unknown; | |
1323 | } | |
1324 | result |= bit; | |
1325 | n += len + (s[n + len] == '|'); | |
1326 | break; | |
1327 | } | |
1328 | } | |
1329 | ||
1330 | if (!bit) { | |
1331 | goto unknown; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | *res_flags = result; | |
1336 | if (res_mask) { | |
1337 | *res_mask = UINT32_MAX; | |
1338 | } | |
1339 | if (res_string) { | |
1340 | *res_string = NULL; | |
1341 | } | |
1342 | return n; | |
1343 | ||
1344 | unknown: | |
1345 | if (res_string) { | |
1346 | *res_string = xasprintf("%s: unknown %s flag(s)", s, field_name); | |
1347 | } | |
1348 | return -EINVAL; | |
1349 | } | |
1350 | ||
064af421 | 1351 | void |
50f96b10 BP |
1352 | flow_format(struct ds *ds, |
1353 | const struct flow *flow, const struct ofputil_port_map *port_map) | |
064af421 | 1354 | { |
aa6c9932 | 1355 | struct match match; |
78c9486d | 1356 | struct flow_wildcards *wc = &match.wc; |
296e07ac | 1357 | |
aa6c9932 | 1358 | match_wc_init(&match, flow); |
78c9486d JR |
1359 | |
1360 | /* As this function is most often used for formatting a packet in a | |
1361 | * packet-in message, skip formatting the packet context fields that are | |
e6d9ab56 JR |
1362 | * all-zeroes to make the print-out easier on the eyes. This means that a |
1363 | * missing context field implies a zero value for that field. This is | |
1364 | * similar to OpenFlow encoding of these fields, as the specification | |
1365 | * states that all-zeroes context fields should not be encoded in the | |
1366 | * packet-in messages. */ | |
1367 | if (!flow->in_port.ofp_port) { | |
1368 | WC_UNMASK_FIELD(wc, in_port); | |
1369 | } | |
78c9486d JR |
1370 | if (!flow->skb_priority) { |
1371 | WC_UNMASK_FIELD(wc, skb_priority); | |
1372 | } | |
1373 | if (!flow->pkt_mark) { | |
1374 | WC_UNMASK_FIELD(wc, pkt_mark); | |
1375 | } | |
1376 | if (!flow->recirc_id) { | |
1377 | WC_UNMASK_FIELD(wc, recirc_id); | |
1378 | } | |
330de069 JR |
1379 | if (!flow->dp_hash) { |
1380 | WC_UNMASK_FIELD(wc, dp_hash); | |
1381 | } | |
07659514 JS |
1382 | if (!flow->ct_state) { |
1383 | WC_UNMASK_FIELD(wc, ct_state); | |
1384 | } | |
1385 | if (!flow->ct_zone) { | |
1386 | WC_UNMASK_FIELD(wc, ct_zone); | |
1387 | } | |
8e53fe8c JS |
1388 | if (!flow->ct_mark) { |
1389 | WC_UNMASK_FIELD(wc, ct_mark); | |
1390 | } | |
2ff8484b | 1391 | if (ovs_u128_is_zero(flow->ct_label)) { |
9daf2348 JS |
1392 | WC_UNMASK_FIELD(wc, ct_label); |
1393 | } | |
daf4d3c1 JR |
1394 | if (!is_ct_valid(flow, &match.wc, NULL) || !flow->ct_nw_proto) { |
1395 | WC_UNMASK_FIELD(wc, ct_nw_proto); | |
1396 | WC_UNMASK_FIELD(wc, ct_tp_src); | |
1397 | WC_UNMASK_FIELD(wc, ct_tp_dst); | |
1398 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1399 | WC_UNMASK_FIELD(wc, ct_nw_src); | |
1400 | WC_UNMASK_FIELD(wc, ct_nw_dst); | |
1401 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1402 | WC_UNMASK_FIELD(wc, ct_ipv6_src); | |
1403 | WC_UNMASK_FIELD(wc, ct_ipv6_dst); | |
1404 | } | |
1405 | } | |
78c9486d JR |
1406 | for (int i = 0; i < FLOW_N_REGS; i++) { |
1407 | if (!flow->regs[i]) { | |
1408 | WC_UNMASK_FIELD(wc, regs[i]); | |
1409 | } | |
1410 | } | |
1411 | if (!flow->metadata) { | |
1412 | WC_UNMASK_FIELD(wc, metadata); | |
1413 | } | |
1414 | ||
50f96b10 | 1415 | match_format(&match, port_map, ds, OFP_DEFAULT_PRIORITY); |
064af421 BP |
1416 | } |
1417 | ||
1418 | void | |
50f96b10 BP |
1419 | flow_print(FILE *stream, |
1420 | const struct flow *flow, const struct ofputil_port_map *port_map) | |
064af421 | 1421 | { |
50f96b10 | 1422 | char *s = flow_to_string(flow, port_map); |
064af421 BP |
1423 | fputs(s, stream); |
1424 | free(s); | |
1425 | } | |
54363004 BP |
1426 | \f |
1427 | /* flow_wildcards functions. */ | |
1428 | ||
d8ae4d67 | 1429 | /* Initializes 'wc' as a set of wildcards that matches every packet. */ |
54363004 | 1430 | void |
d8ae4d67 | 1431 | flow_wildcards_init_catchall(struct flow_wildcards *wc) |
54363004 | 1432 | { |
659c2346 | 1433 | memset(&wc->masks, 0, sizeof wc->masks); |
54363004 BP |
1434 | } |
1435 | ||
78c9486d JR |
1436 | /* Converts a flow into flow wildcards. It sets the wildcard masks based on |
1437 | * the packet headers extracted to 'flow'. It will not set the mask for fields | |
1438 | * that do not make sense for the packet type. OpenFlow-only metadata is | |
1439 | * wildcarded, but other metadata is unconditionally exact-matched. */ | |
f0fb825a EG |
1440 | void |
1441 | flow_wildcards_init_for_packet(struct flow_wildcards *wc, | |
1442 | const struct flow *flow) | |
78c9486d | 1443 | { |
cb1145d1 ZB |
1444 | ovs_be16 dl_type = OVS_BE16_MAX; |
1445 | ||
78c9486d JR |
1446 | memset(&wc->masks, 0x0, sizeof wc->masks); |
1447 | ||
0de8783a | 1448 | /* Update this function whenever struct flow changes. */ |
2482b0b0 | 1449 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 39); |
0de8783a | 1450 | |
ffe4c74f | 1451 | if (flow_tnl_dst_is_set(&flow->tunnel)) { |
78c9486d JR |
1452 | if (flow->tunnel.flags & FLOW_TNL_F_KEY) { |
1453 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1454 | } | |
1455 | WC_MASK_FIELD(wc, tunnel.ip_src); | |
1456 | WC_MASK_FIELD(wc, tunnel.ip_dst); | |
ffe4c74f JB |
1457 | WC_MASK_FIELD(wc, tunnel.ipv6_src); |
1458 | WC_MASK_FIELD(wc, tunnel.ipv6_dst); | |
78c9486d JR |
1459 | WC_MASK_FIELD(wc, tunnel.flags); |
1460 | WC_MASK_FIELD(wc, tunnel.ip_tos); | |
1461 | WC_MASK_FIELD(wc, tunnel.ip_ttl); | |
1462 | WC_MASK_FIELD(wc, tunnel.tp_src); | |
1463 | WC_MASK_FIELD(wc, tunnel.tp_dst); | |
ac6073e3 MC |
1464 | WC_MASK_FIELD(wc, tunnel.gbp_id); |
1465 | WC_MASK_FIELD(wc, tunnel.gbp_flags); | |
9558d2a5 | 1466 | |
6728d578 JG |
1467 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1468 | if (flow->tunnel.metadata.present.map) { | |
1469 | wc->masks.tunnel.metadata.present.map = | |
1470 | flow->tunnel.metadata.present.map; | |
1471 | WC_MASK_FIELD(wc, tunnel.metadata.opts.u8); | |
8d8ab6c2 | 1472 | WC_MASK_FIELD(wc, tunnel.metadata.tab); |
6728d578 JG |
1473 | } |
1474 | } else { | |
1475 | WC_MASK_FIELD(wc, tunnel.metadata.present.len); | |
1476 | memset(wc->masks.tunnel.metadata.opts.gnv, 0xff, | |
1477 | flow->tunnel.metadata.present.len); | |
9558d2a5 | 1478 | } |
78c9486d JR |
1479 | } else if (flow->tunnel.tun_id) { |
1480 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1481 | } | |
1482 | ||
18080541 | 1483 | /* metadata, regs, and conj_id wildcarded. */ |
78c9486d JR |
1484 | |
1485 | WC_MASK_FIELD(wc, skb_priority); | |
1486 | WC_MASK_FIELD(wc, pkt_mark); | |
07659514 JS |
1487 | WC_MASK_FIELD(wc, ct_state); |
1488 | WC_MASK_FIELD(wc, ct_zone); | |
8e53fe8c | 1489 | WC_MASK_FIELD(wc, ct_mark); |
9daf2348 | 1490 | WC_MASK_FIELD(wc, ct_label); |
78c9486d JR |
1491 | WC_MASK_FIELD(wc, recirc_id); |
1492 | WC_MASK_FIELD(wc, dp_hash); | |
1493 | WC_MASK_FIELD(wc, in_port); | |
1494 | ||
c61f3870 BP |
1495 | /* actset_output wildcarded. */ |
1496 | ||
3d4b2e6e | 1497 | WC_MASK_FIELD(wc, packet_type); |
cb1145d1 ZB |
1498 | if (flow->packet_type == htonl(PT_ETH)) { |
1499 | WC_MASK_FIELD(wc, dl_dst); | |
1500 | WC_MASK_FIELD(wc, dl_src); | |
1501 | WC_MASK_FIELD(wc, dl_type); | |
1502 | /* No need to set mask of inner VLANs that don't exist. */ | |
1503 | for (int i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { | |
1504 | /* Always show the first zero VLAN. */ | |
1505 | WC_MASK_FIELD(wc, vlans[i]); | |
1506 | if (flow->vlans[i].tci == htons(0)) { | |
1507 | break; | |
1508 | } | |
f0fb825a | 1509 | } |
cb1145d1 ZB |
1510 | dl_type = flow->dl_type; |
1511 | } else { | |
1512 | dl_type = pt_ns_type_be(flow->packet_type); | |
f0fb825a | 1513 | } |
78c9486d | 1514 | |
cb1145d1 | 1515 | if (dl_type == htons(ETH_TYPE_IP)) { |
78c9486d JR |
1516 | WC_MASK_FIELD(wc, nw_src); |
1517 | WC_MASK_FIELD(wc, nw_dst); | |
daf4d3c1 JR |
1518 | WC_MASK_FIELD(wc, ct_nw_src); |
1519 | WC_MASK_FIELD(wc, ct_nw_dst); | |
cb1145d1 | 1520 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { |
78c9486d JR |
1521 | WC_MASK_FIELD(wc, ipv6_src); |
1522 | WC_MASK_FIELD(wc, ipv6_dst); | |
1523 | WC_MASK_FIELD(wc, ipv6_label); | |
daf4d3c1 JR |
1524 | if (is_nd(flow, wc)) { |
1525 | WC_MASK_FIELD(wc, arp_sha); | |
1526 | WC_MASK_FIELD(wc, arp_tha); | |
1527 | WC_MASK_FIELD(wc, nd_target); | |
1528 | } else { | |
1529 | WC_MASK_FIELD(wc, ct_ipv6_src); | |
1530 | WC_MASK_FIELD(wc, ct_ipv6_dst); | |
1531 | } | |
cb1145d1 ZB |
1532 | } else if (dl_type == htons(ETH_TYPE_ARP) || |
1533 | dl_type == htons(ETH_TYPE_RARP)) { | |
78c9486d JR |
1534 | WC_MASK_FIELD(wc, nw_src); |
1535 | WC_MASK_FIELD(wc, nw_dst); | |
1536 | WC_MASK_FIELD(wc, nw_proto); | |
1537 | WC_MASK_FIELD(wc, arp_sha); | |
1538 | WC_MASK_FIELD(wc, arp_tha); | |
1539 | return; | |
cb1145d1 | 1540 | } else if (eth_type_mpls(dl_type)) { |
78c9486d JR |
1541 | for (int i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { |
1542 | WC_MASK_FIELD(wc, mpls_lse[i]); | |
1543 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
1544 | break; | |
1545 | } | |
1546 | } | |
1547 | return; | |
1548 | } else { | |
1549 | return; /* Unknown ethertype. */ | |
1550 | } | |
1551 | ||
1552 | /* IPv4 or IPv6. */ | |
1553 | WC_MASK_FIELD(wc, nw_frag); | |
1554 | WC_MASK_FIELD(wc, nw_tos); | |
1555 | WC_MASK_FIELD(wc, nw_ttl); | |
1556 | WC_MASK_FIELD(wc, nw_proto); | |
daf4d3c1 JR |
1557 | WC_MASK_FIELD(wc, ct_nw_proto); |
1558 | WC_MASK_FIELD(wc, ct_tp_src); | |
1559 | WC_MASK_FIELD(wc, ct_tp_dst); | |
78c9486d JR |
1560 | |
1561 | /* No transport layer header in later fragments. */ | |
1562 | if (!(flow->nw_frag & FLOW_NW_FRAG_LATER) && | |
1563 | (flow->nw_proto == IPPROTO_ICMP || | |
1564 | flow->nw_proto == IPPROTO_ICMPV6 || | |
1565 | flow->nw_proto == IPPROTO_TCP || | |
1566 | flow->nw_proto == IPPROTO_UDP || | |
1567 | flow->nw_proto == IPPROTO_SCTP || | |
1568 | flow->nw_proto == IPPROTO_IGMP)) { | |
1569 | WC_MASK_FIELD(wc, tp_src); | |
1570 | WC_MASK_FIELD(wc, tp_dst); | |
1571 | ||
1572 | if (flow->nw_proto == IPPROTO_TCP) { | |
1573 | WC_MASK_FIELD(wc, tcp_flags); | |
78c9486d JR |
1574 | } else if (flow->nw_proto == IPPROTO_IGMP) { |
1575 | WC_MASK_FIELD(wc, igmp_group_ip4); | |
1576 | } | |
1577 | } | |
1578 | } | |
1579 | ||
0de8783a JR |
1580 | /* Return a map of possible fields for a packet of the same type as 'flow'. |
1581 | * Including extra bits in the returned mask is not wrong, it is just less | |
1582 | * optimal. | |
1583 | * | |
1584 | * This is a less precise version of flow_wildcards_init_for_packet() above. */ | |
361d808d | 1585 | void |
5fcff47b | 1586 | flow_wc_map(const struct flow *flow, struct flowmap *map) |
0de8783a JR |
1587 | { |
1588 | /* Update this function whenever struct flow changes. */ | |
2482b0b0 | 1589 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 39); |
0de8783a | 1590 | |
5fcff47b JR |
1591 | flowmap_init(map); |
1592 | ||
ffe4c74f | 1593 | if (flow_tnl_dst_is_set(&flow->tunnel)) { |
5fcff47b | 1594 | FLOWMAP_SET__(map, tunnel, offsetof(struct flow_tnl, metadata)); |
6728d578 JG |
1595 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1596 | if (flow->tunnel.metadata.present.map) { | |
5fcff47b | 1597 | FLOWMAP_SET(map, tunnel.metadata); |
6728d578 JG |
1598 | } |
1599 | } else { | |
5fcff47b JR |
1600 | FLOWMAP_SET(map, tunnel.metadata.present.len); |
1601 | FLOWMAP_SET__(map, tunnel.metadata.opts.gnv, | |
1602 | flow->tunnel.metadata.present.len); | |
361d808d JR |
1603 | } |
1604 | } | |
0de8783a JR |
1605 | |
1606 | /* Metadata fields that can appear on packet input. */ | |
5fcff47b JR |
1607 | FLOWMAP_SET(map, skb_priority); |
1608 | FLOWMAP_SET(map, pkt_mark); | |
1609 | FLOWMAP_SET(map, recirc_id); | |
1610 | FLOWMAP_SET(map, dp_hash); | |
1611 | FLOWMAP_SET(map, in_port); | |
1612 | FLOWMAP_SET(map, dl_dst); | |
1613 | FLOWMAP_SET(map, dl_src); | |
1614 | FLOWMAP_SET(map, dl_type); | |
f0fb825a | 1615 | FLOWMAP_SET(map, vlans); |
07659514 JS |
1616 | FLOWMAP_SET(map, ct_state); |
1617 | FLOWMAP_SET(map, ct_zone); | |
8e53fe8c | 1618 | FLOWMAP_SET(map, ct_mark); |
9daf2348 | 1619 | FLOWMAP_SET(map, ct_label); |
2482b0b0 | 1620 | FLOWMAP_SET(map, packet_type); |
0de8783a JR |
1621 | |
1622 | /* Ethertype-dependent fields. */ | |
1623 | if (OVS_LIKELY(flow->dl_type == htons(ETH_TYPE_IP))) { | |
5fcff47b JR |
1624 | FLOWMAP_SET(map, nw_src); |
1625 | FLOWMAP_SET(map, nw_dst); | |
1626 | FLOWMAP_SET(map, nw_proto); | |
1627 | FLOWMAP_SET(map, nw_frag); | |
1628 | FLOWMAP_SET(map, nw_tos); | |
1629 | FLOWMAP_SET(map, nw_ttl); | |
8ecb3068 DDP |
1630 | FLOWMAP_SET(map, tp_src); |
1631 | FLOWMAP_SET(map, tp_dst); | |
daf4d3c1 JR |
1632 | FLOWMAP_SET(map, ct_nw_proto); |
1633 | FLOWMAP_SET(map, ct_nw_src); | |
1634 | FLOWMAP_SET(map, ct_nw_dst); | |
1635 | FLOWMAP_SET(map, ct_tp_src); | |
1636 | FLOWMAP_SET(map, ct_tp_dst); | |
5fcff47b | 1637 | |
0de8783a | 1638 | if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_IGMP)) { |
5fcff47b | 1639 | FLOWMAP_SET(map, igmp_group_ip4); |
0de8783a | 1640 | } else { |
5fcff47b | 1641 | FLOWMAP_SET(map, tcp_flags); |
0de8783a JR |
1642 | } |
1643 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
5fcff47b JR |
1644 | FLOWMAP_SET(map, ipv6_src); |
1645 | FLOWMAP_SET(map, ipv6_dst); | |
1646 | FLOWMAP_SET(map, ipv6_label); | |
1647 | FLOWMAP_SET(map, nw_proto); | |
1648 | FLOWMAP_SET(map, nw_frag); | |
1649 | FLOWMAP_SET(map, nw_tos); | |
1650 | FLOWMAP_SET(map, nw_ttl); | |
8ecb3068 DDP |
1651 | FLOWMAP_SET(map, tp_src); |
1652 | FLOWMAP_SET(map, tp_dst); | |
5fcff47b | 1653 | |
daf4d3c1 | 1654 | if (OVS_UNLIKELY(is_nd(flow, NULL))) { |
5fcff47b JR |
1655 | FLOWMAP_SET(map, nd_target); |
1656 | FLOWMAP_SET(map, arp_sha); | |
1657 | FLOWMAP_SET(map, arp_tha); | |
0de8783a | 1658 | } else { |
daf4d3c1 JR |
1659 | FLOWMAP_SET(map, ct_nw_proto); |
1660 | FLOWMAP_SET(map, ct_ipv6_src); | |
1661 | FLOWMAP_SET(map, ct_ipv6_dst); | |
1662 | FLOWMAP_SET(map, ct_tp_src); | |
1663 | FLOWMAP_SET(map, ct_tp_dst); | |
5fcff47b | 1664 | FLOWMAP_SET(map, tcp_flags); |
0de8783a JR |
1665 | } |
1666 | } else if (eth_type_mpls(flow->dl_type)) { | |
5fcff47b | 1667 | FLOWMAP_SET(map, mpls_lse); |
0de8783a JR |
1668 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
1669 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
5fcff47b JR |
1670 | FLOWMAP_SET(map, nw_src); |
1671 | FLOWMAP_SET(map, nw_dst); | |
1672 | FLOWMAP_SET(map, nw_proto); | |
1673 | FLOWMAP_SET(map, arp_sha); | |
1674 | FLOWMAP_SET(map, arp_tha); | |
0de8783a | 1675 | } |
0de8783a JR |
1676 | } |
1677 | ||
c11c6faa AZ |
1678 | /* Clear the metadata and register wildcard masks. They are not packet |
1679 | * header fields. */ | |
1680 | void | |
1681 | flow_wildcards_clear_non_packet_fields(struct flow_wildcards *wc) | |
1682 | { | |
0de8783a | 1683 | /* Update this function whenever struct flow changes. */ |
2482b0b0 | 1684 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 39); |
0de8783a | 1685 | |
c11c6faa AZ |
1686 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
1687 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
c61f3870 | 1688 | wc->masks.actset_output = 0; |
18080541 | 1689 | wc->masks.conj_id = 0; |
c11c6faa AZ |
1690 | } |
1691 | ||
ecf1e7ac BP |
1692 | /* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or |
1693 | * fields. */ | |
1694 | bool | |
1695 | flow_wildcards_is_catchall(const struct flow_wildcards *wc) | |
1696 | { | |
d70e8c28 | 1697 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
659c2346 | 1698 | size_t i; |
ecf1e7ac | 1699 | |
d70e8c28 JR |
1700 | for (i = 0; i < FLOW_U64S; i++) { |
1701 | if (wc_u64[i]) { | |
ecf1e7ac BP |
1702 | return false; |
1703 | } | |
1704 | } | |
ecf1e7ac BP |
1705 | return true; |
1706 | } | |
1707 | ||
368eefac EJ |
1708 | /* Sets 'dst' as the bitwise AND of wildcards in 'src1' and 'src2'. |
1709 | * That is, a bit or a field is wildcarded in 'dst' if it is wildcarded | |
1710 | * in 'src1' or 'src2' or both. */ | |
b5d97350 | 1711 | void |
368eefac EJ |
1712 | flow_wildcards_and(struct flow_wildcards *dst, |
1713 | const struct flow_wildcards *src1, | |
1714 | const struct flow_wildcards *src2) | |
b5d97350 | 1715 | { |
d70e8c28 JR |
1716 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1717 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1718 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
659c2346 | 1719 | size_t i; |
a79c50f3 | 1720 | |
d70e8c28 JR |
1721 | for (i = 0; i < FLOW_U64S; i++) { |
1722 | dst_u64[i] = src1_u64[i] & src2_u64[i]; | |
26720e24 | 1723 | } |
b5d97350 BP |
1724 | } |
1725 | ||
368eefac EJ |
1726 | /* Sets 'dst' as the bitwise OR of wildcards in 'src1' and 'src2'. That |
1727 | * is, a bit or a field is wildcarded in 'dst' if it is neither | |
1728 | * wildcarded in 'src1' nor 'src2'. */ | |
1729 | void | |
1730 | flow_wildcards_or(struct flow_wildcards *dst, | |
1731 | const struct flow_wildcards *src1, | |
1732 | const struct flow_wildcards *src2) | |
1733 | { | |
d70e8c28 JR |
1734 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1735 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1736 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
368eefac EJ |
1737 | size_t i; |
1738 | ||
d70e8c28 JR |
1739 | for (i = 0; i < FLOW_U64S; i++) { |
1740 | dst_u64[i] = src1_u64[i] | src2_u64[i]; | |
368eefac EJ |
1741 | } |
1742 | } | |
1743 | ||
b5d97350 BP |
1744 | /* Returns a hash of the wildcards in 'wc'. */ |
1745 | uint32_t | |
1006cda6 | 1746 | flow_wildcards_hash(const struct flow_wildcards *wc, uint32_t basis) |
b5d97350 | 1747 | { |
ac31c5af | 1748 | return flow_hash(&wc->masks, basis); |
b5d97350 BP |
1749 | } |
1750 | ||
1751 | /* Returns true if 'a' and 'b' represent the same wildcards, false if they are | |
1752 | * different. */ | |
1753 | bool | |
1754 | flow_wildcards_equal(const struct flow_wildcards *a, | |
1755 | const struct flow_wildcards *b) | |
1756 | { | |
659c2346 | 1757 | return flow_equal(&a->masks, &b->masks); |
b5d97350 BP |
1758 | } |
1759 | ||
1760 | /* Returns true if at least one bit or field is wildcarded in 'a' but not in | |
1761 | * 'b', false otherwise. */ | |
1762 | bool | |
1763 | flow_wildcards_has_extra(const struct flow_wildcards *a, | |
1764 | const struct flow_wildcards *b) | |
1765 | { | |
d70e8c28 JR |
1766 | const uint64_t *a_u64 = (const uint64_t *) &a->masks; |
1767 | const uint64_t *b_u64 = (const uint64_t *) &b->masks; | |
659c2346 | 1768 | size_t i; |
a79c50f3 | 1769 | |
d70e8c28 JR |
1770 | for (i = 0; i < FLOW_U64S; i++) { |
1771 | if ((a_u64[i] & b_u64[i]) != b_u64[i]) { | |
b6c9e612 BP |
1772 | return true; |
1773 | } | |
1774 | } | |
659c2346 BP |
1775 | return false; |
1776 | } | |
b6c9e612 | 1777 | |
659c2346 BP |
1778 | /* Returns true if 'a' and 'b' are equal, except that 0-bits (wildcarded bits) |
1779 | * in 'wc' do not need to be equal in 'a' and 'b'. */ | |
1780 | bool | |
1781 | flow_equal_except(const struct flow *a, const struct flow *b, | |
1782 | const struct flow_wildcards *wc) | |
1783 | { | |
d70e8c28 JR |
1784 | const uint64_t *a_u64 = (const uint64_t *) a; |
1785 | const uint64_t *b_u64 = (const uint64_t *) b; | |
1786 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; | |
659c2346 | 1787 | size_t i; |
d31f1109 | 1788 | |
d70e8c28 JR |
1789 | for (i = 0; i < FLOW_U64S; i++) { |
1790 | if ((a_u64[i] ^ b_u64[i]) & wc_u64[i]) { | |
659c2346 BP |
1791 | return false; |
1792 | } | |
47284b1f | 1793 | } |
659c2346 | 1794 | return true; |
b5d97350 BP |
1795 | } |
1796 | ||
b6c9e612 BP |
1797 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1798 | * (A 0-bit indicates a wildcard bit.) */ | |
1799 | void | |
1800 | flow_wildcards_set_reg_mask(struct flow_wildcards *wc, int idx, uint32_t mask) | |
1801 | { | |
26720e24 | 1802 | wc->masks.regs[idx] = mask; |
b6c9e612 | 1803 | } |
ff55ea1f | 1804 | |
79fe0f46 BP |
1805 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1806 | * (A 0-bit indicates a wildcard bit.) */ | |
1807 | void | |
1808 | flow_wildcards_set_xreg_mask(struct flow_wildcards *wc, int idx, uint64_t mask) | |
1809 | { | |
1810 | flow_set_xreg(&wc->masks, idx, mask); | |
1811 | } | |
1812 | ||
b23ada8e JP |
1813 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1814 | * (A 0-bit indicates a wildcard bit.) */ | |
1815 | void | |
1816 | flow_wildcards_set_xxreg_mask(struct flow_wildcards *wc, int idx, | |
1817 | ovs_u128 mask) | |
1818 | { | |
1819 | flow_set_xxreg(&wc->masks, idx, mask); | |
1820 | } | |
1821 | ||
28a560d9 JR |
1822 | /* Calculates the 5-tuple hash from the given miniflow. |
1823 | * This returns the same value as flow_hash_5tuple for the corresponding | |
1824 | * flow. */ | |
4f150744 JR |
1825 | uint32_t |
1826 | miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis) | |
1827 | { | |
2482b0b0 | 1828 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 39); |
28a560d9 | 1829 | uint32_t hash = basis; |
4f150744 | 1830 | |
28a560d9 JR |
1831 | if (flow) { |
1832 | ovs_be16 dl_type = MINIFLOW_GET_BE16(flow, dl_type); | |
362ad4ba | 1833 | uint8_t nw_proto; |
28a560d9 | 1834 | |
28a560d9 | 1835 | if (dl_type == htons(ETH_TYPE_IPV6)) { |
5fcff47b | 1836 | struct flowmap map = FLOWMAP_EMPTY_INITIALIZER; |
d70e8c28 | 1837 | uint64_t value; |
4f150744 | 1838 | |
5fcff47b JR |
1839 | FLOWMAP_SET(&map, ipv6_src); |
1840 | FLOWMAP_SET(&map, ipv6_dst); | |
1841 | ||
1842 | MINIFLOW_FOR_EACH_IN_FLOWMAP(value, flow, map) { | |
d70e8c28 | 1843 | hash = hash_add64(hash, value); |
28a560d9 | 1844 | } |
362ad4ba DDP |
1845 | } else if (dl_type == htons(ETH_TYPE_IP) |
1846 | || dl_type == htons(ETH_TYPE_ARP)) { | |
d70e8c28 JR |
1847 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_src)); |
1848 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_dst)); | |
362ad4ba DDP |
1849 | } else { |
1850 | goto out; | |
28a560d9 | 1851 | } |
362ad4ba DDP |
1852 | |
1853 | nw_proto = MINIFLOW_GET_U8(flow, nw_proto); | |
1854 | hash = hash_add(hash, nw_proto); | |
1855 | if (nw_proto != IPPROTO_TCP && nw_proto != IPPROTO_UDP | |
1856 | && nw_proto != IPPROTO_SCTP && nw_proto != IPPROTO_ICMP | |
1857 | && nw_proto != IPPROTO_ICMPV6) { | |
1858 | goto out; | |
1859 | } | |
1860 | ||
d70e8c28 JR |
1861 | /* Add both ports at once. */ |
1862 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, tp_src)); | |
28a560d9 | 1863 | } |
362ad4ba DDP |
1864 | out: |
1865 | return hash_finish(hash, 42); | |
4f150744 JR |
1866 | } |
1867 | ||
268eca11 BP |
1868 | ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst); |
1869 | ASSERT_SEQUENTIAL(ipv6_src, ipv6_dst); | |
4f150744 | 1870 | |
63be20be AW |
1871 | /* Calculates the 5-tuple hash from the given flow. */ |
1872 | uint32_t | |
1873 | flow_hash_5tuple(const struct flow *flow, uint32_t basis) | |
1874 | { | |
2482b0b0 | 1875 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 39); |
28a560d9 | 1876 | uint32_t hash = basis; |
63be20be | 1877 | |
28a560d9 | 1878 | if (flow) { |
28a560d9 JR |
1879 | |
1880 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
d70e8c28 JR |
1881 | const uint64_t *flow_u64 = (const uint64_t *)flow; |
1882 | int ofs = offsetof(struct flow, ipv6_src) / 8; | |
1883 | int end = ofs + 2 * sizeof flow->ipv6_src / 8; | |
63be20be | 1884 | |
d70e8c28 JR |
1885 | for (;ofs < end; ofs++) { |
1886 | hash = hash_add64(hash, flow_u64[ofs]); | |
28a560d9 | 1887 | } |
362ad4ba DDP |
1888 | } else if (flow->dl_type == htons(ETH_TYPE_IP) |
1889 | || flow->dl_type == htons(ETH_TYPE_ARP)) { | |
33c6a1b9 JR |
1890 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_src); |
1891 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_dst); | |
362ad4ba DDP |
1892 | } else { |
1893 | goto out; | |
28a560d9 | 1894 | } |
362ad4ba DDP |
1895 | |
1896 | hash = hash_add(hash, flow->nw_proto); | |
1897 | if (flow->nw_proto != IPPROTO_TCP && flow->nw_proto != IPPROTO_UDP | |
1898 | && flow->nw_proto != IPPROTO_SCTP && flow->nw_proto != IPPROTO_ICMP | |
1899 | && flow->nw_proto != IPPROTO_ICMPV6) { | |
1900 | goto out; | |
1901 | } | |
1902 | ||
d70e8c28 JR |
1903 | /* Add both ports at once. */ |
1904 | hash = hash_add(hash, | |
1905 | ((const uint32_t *)flow)[offsetof(struct flow, tp_src) | |
1906 | / sizeof(uint32_t)]); | |
28a560d9 | 1907 | } |
362ad4ba DDP |
1908 | out: |
1909 | return hash_finish(hash, 42); /* Arbitrary number. */ | |
63be20be AW |
1910 | } |
1911 | ||
ff55ea1f EJ |
1912 | /* Hashes 'flow' based on its L2 through L4 protocol information. */ |
1913 | uint32_t | |
1914 | flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis) | |
1915 | { | |
1916 | struct { | |
d31f1109 JP |
1917 | union { |
1918 | ovs_be32 ipv4_addr; | |
1919 | struct in6_addr ipv6_addr; | |
1920 | }; | |
ff55ea1f EJ |
1921 | ovs_be16 eth_type; |
1922 | ovs_be16 vlan_tci; | |
5b909cbb | 1923 | ovs_be16 tp_port; |
74ff3298 | 1924 | struct eth_addr eth_addr; |
ff55ea1f EJ |
1925 | uint8_t ip_proto; |
1926 | } fields; | |
1927 | ||
1928 | int i; | |
1929 | ||
1930 | memset(&fields, 0, sizeof fields); | |
74ff3298 JR |
1931 | for (i = 0; i < ARRAY_SIZE(fields.eth_addr.be16); i++) { |
1932 | fields.eth_addr.be16[i] = flow->dl_src.be16[i] ^ flow->dl_dst.be16[i]; | |
ff55ea1f | 1933 | } |
f0fb825a EG |
1934 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { |
1935 | fields.vlan_tci ^= flow->vlans[i].tci & htons(VLAN_VID_MASK); | |
1936 | } | |
ff55ea1f | 1937 | fields.eth_type = flow->dl_type; |
3e3eda95 EJ |
1938 | |
1939 | /* UDP source and destination port are not taken into account because they | |
1940 | * will not necessarily be symmetric in a bidirectional flow. */ | |
ff55ea1f | 1941 | if (fields.eth_type == htons(ETH_TYPE_IP)) { |
d31f1109 JP |
1942 | fields.ipv4_addr = flow->nw_src ^ flow->nw_dst; |
1943 | fields.ip_proto = flow->nw_proto; | |
c6bcb685 | 1944 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 1945 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
d31f1109 JP |
1946 | } |
1947 | } else if (fields.eth_type == htons(ETH_TYPE_IPV6)) { | |
1948 | const uint8_t *a = &flow->ipv6_src.s6_addr[0]; | |
1949 | const uint8_t *b = &flow->ipv6_dst.s6_addr[0]; | |
1950 | uint8_t *ipv6_addr = &fields.ipv6_addr.s6_addr[0]; | |
1951 | ||
1952 | for (i=0; i<16; i++) { | |
1953 | ipv6_addr[i] = a[i] ^ b[i]; | |
1954 | } | |
ff55ea1f | 1955 | fields.ip_proto = flow->nw_proto; |
c6bcb685 | 1956 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 1957 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
ff55ea1f | 1958 | } |
ff55ea1f | 1959 | } |
c49d1dd1 | 1960 | return jhash_bytes(&fields, sizeof fields, basis); |
ff55ea1f | 1961 | } |
520e9a2a | 1962 | |
4249b547 JB |
1963 | /* Hashes 'flow' based on its L3 through L4 protocol information */ |
1964 | uint32_t | |
1965 | flow_hash_symmetric_l3l4(const struct flow *flow, uint32_t basis, | |
1966 | bool inc_udp_ports) | |
1967 | { | |
1968 | uint32_t hash = basis; | |
1969 | ||
1970 | /* UDP source and destination port are also taken into account. */ | |
1971 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1972 | hash = hash_add(hash, | |
1973 | (OVS_FORCE uint32_t) (flow->nw_src ^ flow->nw_dst)); | |
1974 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1975 | /* IPv6 addresses are 64-bit aligned inside struct flow. */ | |
1976 | const uint64_t *a = ALIGNED_CAST(uint64_t *, flow->ipv6_src.s6_addr); | |
1977 | const uint64_t *b = ALIGNED_CAST(uint64_t *, flow->ipv6_dst.s6_addr); | |
1978 | ||
caaabd19 | 1979 | for (int i = 0; i < sizeof flow->ipv6_src / sizeof *a; i++) { |
4249b547 JB |
1980 | hash = hash_add64(hash, a[i] ^ b[i]); |
1981 | } | |
1982 | } else { | |
1983 | /* Cannot hash non-IP flows */ | |
1984 | return 0; | |
1985 | } | |
1986 | ||
1987 | hash = hash_add(hash, flow->nw_proto); | |
1988 | if (flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP || | |
1989 | (inc_udp_ports && flow->nw_proto == IPPROTO_UDP)) { | |
1990 | hash = hash_add(hash, | |
1991 | (OVS_FORCE uint16_t) (flow->tp_src ^ flow->tp_dst)); | |
1992 | } | |
1993 | ||
1994 | return hash_finish(hash, basis); | |
1995 | } | |
1996 | ||
94639963 JR |
1997 | /* Initialize a flow with random fields that matter for nx_hash_fields. */ |
1998 | void | |
1999 | flow_random_hash_fields(struct flow *flow) | |
2000 | { | |
2001 | uint16_t rnd = random_uint16(); | |
f0fb825a | 2002 | int i; |
94639963 JR |
2003 | |
2004 | /* Initialize to all zeros. */ | |
2005 | memset(flow, 0, sizeof *flow); | |
2006 | ||
74ff3298 JR |
2007 | eth_addr_random(&flow->dl_src); |
2008 | eth_addr_random(&flow->dl_dst); | |
94639963 | 2009 | |
f0fb825a EG |
2010 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { |
2011 | uint16_t vlan = random_uint16() & VLAN_VID_MASK; | |
2012 | flow->vlans[i].tpid = htons(ETH_TYPE_VLAN_8021Q); | |
2013 | flow->vlans[i].tci = htons(vlan | VLAN_CFI); | |
2014 | } | |
94639963 JR |
2015 | |
2016 | /* Make most of the random flows IPv4, some IPv6, and rest random. */ | |
2017 | flow->dl_type = rnd < 0x8000 ? htons(ETH_TYPE_IP) : | |
2018 | rnd < 0xc000 ? htons(ETH_TYPE_IPV6) : (OVS_FORCE ovs_be16)rnd; | |
2019 | ||
2020 | if (dl_type_is_ip_any(flow->dl_type)) { | |
2021 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2022 | flow->nw_src = (OVS_FORCE ovs_be32)random_uint32(); | |
2023 | flow->nw_dst = (OVS_FORCE ovs_be32)random_uint32(); | |
2024 | } else { | |
2025 | random_bytes(&flow->ipv6_src, sizeof flow->ipv6_src); | |
2026 | random_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst); | |
2027 | } | |
2028 | /* Make most of IP flows TCP, some UDP or SCTP, and rest random. */ | |
2029 | rnd = random_uint16(); | |
2030 | flow->nw_proto = rnd < 0x8000 ? IPPROTO_TCP : | |
2031 | rnd < 0xc000 ? IPPROTO_UDP : | |
2032 | rnd < 0xd000 ? IPPROTO_SCTP : (uint8_t)rnd; | |
2033 | if (flow->nw_proto == IPPROTO_TCP || | |
2034 | flow->nw_proto == IPPROTO_UDP || | |
2035 | flow->nw_proto == IPPROTO_SCTP) { | |
2036 | flow->tp_src = (OVS_FORCE ovs_be16)random_uint16(); | |
2037 | flow->tp_dst = (OVS_FORCE ovs_be16)random_uint16(); | |
2038 | } | |
2039 | } | |
2040 | } | |
2041 | ||
bcd2633a JP |
2042 | /* Masks the fields in 'wc' that are used by the flow hash 'fields'. */ |
2043 | void | |
6cdd5145 JP |
2044 | flow_mask_hash_fields(const struct flow *flow, struct flow_wildcards *wc, |
2045 | enum nx_hash_fields fields) | |
bcd2633a | 2046 | { |
f0fb825a | 2047 | int i; |
bcd2633a JP |
2048 | switch (fields) { |
2049 | case NX_HASH_FIELDS_ETH_SRC: | |
2050 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
2051 | break; | |
2052 | ||
2053 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
2054 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
2055 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
6cdd5145 JP |
2056 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2057 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2058 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
7f8a65ca | 2059 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
6cdd5145 JP |
2060 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); |
2061 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2062 | } | |
2063 | if (is_ip_any(flow)) { | |
2064 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
d8d9c698 | 2065 | flow_unwildcard_tp_ports(flow, wc); |
6cdd5145 | 2066 | } |
f0fb825a EG |
2067 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { |
2068 | wc->masks.vlans[i].tci |= htons(VLAN_VID_MASK | VLAN_CFI); | |
2069 | } | |
bcd2633a JP |
2070 | break; |
2071 | ||
4249b547 JB |
2072 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: |
2073 | if (is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP) { | |
2074 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
2075 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
2076 | } | |
2077 | /* no break */ | |
2078 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: | |
2079 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2080 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2081 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
2082 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2083 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); | |
2084 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2085 | } else { | |
2086 | break; /* non-IP flow */ | |
2087 | } | |
2088 | ||
2089 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
2090 | if (flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP) { | |
2091 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
2092 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
2093 | } | |
2094 | break; | |
2095 | ||
417cfdb6 | 2096 | case NX_HASH_FIELDS_NW_SRC: |
2097 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2098 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2099 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2100 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); | |
2101 | } | |
2102 | break; | |
2103 | ||
2104 | case NX_HASH_FIELDS_NW_DST: | |
2105 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2106 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
2107 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2108 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2109 | } | |
2110 | break; | |
2111 | ||
bcd2633a | 2112 | default: |
428b2edd | 2113 | OVS_NOT_REACHED(); |
bcd2633a JP |
2114 | } |
2115 | } | |
2116 | ||
520e9a2a EJ |
2117 | /* Hashes the portions of 'flow' designated by 'fields'. */ |
2118 | uint32_t | |
2119 | flow_hash_fields(const struct flow *flow, enum nx_hash_fields fields, | |
2120 | uint16_t basis) | |
2121 | { | |
2122 | switch (fields) { | |
2123 | ||
2124 | case NX_HASH_FIELDS_ETH_SRC: | |
74ff3298 | 2125 | return jhash_bytes(&flow->dl_src, sizeof flow->dl_src, basis); |
520e9a2a EJ |
2126 | |
2127 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
2128 | return flow_hash_symmetric_l4(flow, basis); | |
4249b547 JB |
2129 | |
2130 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: | |
2131 | return flow_hash_symmetric_l3l4(flow, basis, false); | |
2132 | ||
2133 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: | |
2134 | return flow_hash_symmetric_l3l4(flow, basis, true); | |
2135 | ||
417cfdb6 | 2136 | case NX_HASH_FIELDS_NW_SRC: |
2137 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2138 | return jhash_bytes(&flow->nw_src, sizeof flow->nw_src, basis); | |
2139 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2140 | return jhash_bytes(&flow->ipv6_src, sizeof flow->ipv6_src, basis); | |
2141 | } else { | |
2142 | return basis; | |
2143 | } | |
2144 | ||
2145 | case NX_HASH_FIELDS_NW_DST: | |
2146 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2147 | return jhash_bytes(&flow->nw_dst, sizeof flow->nw_dst, basis); | |
2148 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2149 | return jhash_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst, basis); | |
2150 | } else { | |
2151 | return basis; | |
2152 | } | |
2153 | ||
520e9a2a EJ |
2154 | } |
2155 | ||
428b2edd | 2156 | OVS_NOT_REACHED(); |
520e9a2a EJ |
2157 | } |
2158 | ||
2159 | /* Returns a string representation of 'fields'. */ | |
2160 | const char * | |
2161 | flow_hash_fields_to_str(enum nx_hash_fields fields) | |
2162 | { | |
2163 | switch (fields) { | |
2164 | case NX_HASH_FIELDS_ETH_SRC: return "eth_src"; | |
2165 | case NX_HASH_FIELDS_SYMMETRIC_L4: return "symmetric_l4"; | |
4249b547 JB |
2166 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: return "symmetric_l3l4"; |
2167 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: return "symmetric_l3l4+udp"; | |
417cfdb6 | 2168 | case NX_HASH_FIELDS_NW_SRC: return "nw_src"; |
2169 | case NX_HASH_FIELDS_NW_DST: return "nw_dst"; | |
520e9a2a EJ |
2170 | default: return "<unknown>"; |
2171 | } | |
2172 | } | |
2173 | ||
2174 | /* Returns true if the value of 'fields' is supported. Otherwise false. */ | |
2175 | bool | |
2176 | flow_hash_fields_valid(enum nx_hash_fields fields) | |
2177 | { | |
2178 | return fields == NX_HASH_FIELDS_ETH_SRC | |
4249b547 JB |
2179 | || fields == NX_HASH_FIELDS_SYMMETRIC_L4 |
2180 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4 | |
417cfdb6 | 2181 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP |
2182 | || fields == NX_HASH_FIELDS_NW_SRC | |
2183 | || fields == NX_HASH_FIELDS_NW_DST; | |
520e9a2a | 2184 | } |
8b3b8dd1 | 2185 | |
368eefac EJ |
2186 | /* Returns a hash value for the bits of 'flow' that are active based on |
2187 | * 'wc', given 'basis'. */ | |
2188 | uint32_t | |
2189 | flow_hash_in_wildcards(const struct flow *flow, | |
2190 | const struct flow_wildcards *wc, uint32_t basis) | |
2191 | { | |
d70e8c28 JR |
2192 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
2193 | const uint64_t *flow_u64 = (const uint64_t *) flow; | |
368eefac EJ |
2194 | uint32_t hash; |
2195 | size_t i; | |
2196 | ||
2197 | hash = basis; | |
d70e8c28 JR |
2198 | for (i = 0; i < FLOW_U64S; i++) { |
2199 | hash = hash_add64(hash, flow_u64[i] & wc_u64[i]); | |
368eefac | 2200 | } |
d70e8c28 | 2201 | return hash_finish(hash, 8 * FLOW_U64S); |
368eefac EJ |
2202 | } |
2203 | ||
3719455c BP |
2204 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
2205 | * OpenFlow 1.0 "dl_vlan" value: | |
2206 | * | |
f0fb825a | 2207 | * - If it is in the range 0...4095, 'flow->vlans[0].tci' is set to match |
3719455c BP |
2208 | * that VLAN. Any existing PCP match is unchanged (it becomes 0 if |
2209 | * 'flow' previously matched packets without a VLAN header). | |
2210 | * | |
2211 | * - If it is OFP_VLAN_NONE, 'flow->vlan_tci' is set to match a packet | |
2212 | * without a VLAN tag. | |
2213 | * | |
2214 | * - Other values of 'vid' should not be used. */ | |
2215 | void | |
fb0451d9 | 2216 | flow_set_dl_vlan(struct flow *flow, ovs_be16 vid) |
3719455c | 2217 | { |
0c436519 | 2218 | if (vid == htons(OFP10_VLAN_NONE)) { |
f0fb825a | 2219 | flow->vlans[0].tci = htons(0); |
3719455c BP |
2220 | } else { |
2221 | vid &= htons(VLAN_VID_MASK); | |
f0fb825a EG |
2222 | flow->vlans[0].tci &= ~htons(VLAN_VID_MASK); |
2223 | flow->vlans[0].tci |= htons(VLAN_CFI) | vid; | |
2224 | } | |
2225 | } | |
2226 | ||
2227 | /* Sets the VLAN header TPID, which must be either ETH_TYPE_VLAN_8021Q or | |
2228 | * ETH_TYPE_VLAN_8021AD. */ | |
2229 | void | |
2230 | flow_fix_vlan_tpid(struct flow *flow) | |
2231 | { | |
2232 | if (flow->vlans[0].tpid == htons(0) && flow->vlans[0].tci != 0) { | |
2233 | flow->vlans[0].tpid = htons(ETH_TYPE_VLAN_8021Q); | |
3719455c BP |
2234 | } |
2235 | } | |
2236 | ||
cc34bc8c BP |
2237 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
2238 | * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID | |
2239 | * plus CFI). */ | |
2240 | void | |
2241 | flow_set_vlan_vid(struct flow *flow, ovs_be16 vid) | |
2242 | { | |
2243 | ovs_be16 mask = htons(VLAN_VID_MASK | VLAN_CFI); | |
f0fb825a EG |
2244 | flow->vlans[0].tci &= ~mask; |
2245 | flow->vlans[0].tci |= vid & mask; | |
cc34bc8c BP |
2246 | } |
2247 | ||
3719455c BP |
2248 | /* Sets the VLAN PCP that 'flow' matches to 'pcp', which should be in the |
2249 | * range 0...7. | |
2250 | * | |
2251 | * This function has no effect on the VLAN ID that 'flow' matches. | |
2252 | * | |
2253 | * After calling this function, 'flow' will not match packets without a VLAN | |
2254 | * header. */ | |
2255 | void | |
2256 | flow_set_vlan_pcp(struct flow *flow, uint8_t pcp) | |
2257 | { | |
2258 | pcp &= 0x07; | |
f0fb825a EG |
2259 | flow->vlans[0].tci &= ~htons(VLAN_PCP_MASK); |
2260 | flow->vlans[0].tci |= htons((pcp << VLAN_PCP_SHIFT) | VLAN_CFI); | |
2261 | } | |
2262 | ||
2263 | /* Counts the number of VLAN headers. */ | |
2264 | int | |
2265 | flow_count_vlan_headers(const struct flow *flow) | |
2266 | { | |
2267 | int i; | |
2268 | ||
2269 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { | |
2270 | if (!(flow->vlans[i].tci & htons(VLAN_CFI))) { | |
2271 | break; | |
2272 | } | |
2273 | } | |
2274 | return i; | |
2275 | } | |
2276 | ||
2277 | /* Given '*p_an' and '*p_bn' pointing to one past the last VLAN header of | |
2278 | * 'a' and 'b' respectively, skip common VLANs so that they point to the | |
2279 | * first different VLAN counting from bottom. */ | |
2280 | void | |
2281 | flow_skip_common_vlan_headers(const struct flow *a, int *p_an, | |
2282 | const struct flow *b, int *p_bn) | |
2283 | { | |
2284 | int an = *p_an, bn = *p_bn; | |
2285 | ||
2286 | for (an--, bn--; an >= 0 && bn >= 0; an--, bn--) { | |
2287 | if (a->vlans[an].qtag != b->vlans[bn].qtag) { | |
2288 | break; | |
2289 | } | |
2290 | } | |
2291 | *p_an = an; | |
2292 | *p_bn = bn; | |
2293 | } | |
2294 | ||
2295 | void | |
2296 | flow_pop_vlan(struct flow *flow, struct flow_wildcards *wc) | |
2297 | { | |
2298 | int n = flow_count_vlan_headers(flow); | |
68c744fd BP |
2299 | if (n > 1) { |
2300 | if (wc) { | |
2301 | memset(&wc->masks.vlans[1], 0xff, | |
2302 | sizeof(union flow_vlan_hdr) * (n - 1)); | |
2303 | } | |
2304 | memmove(&flow->vlans[0], &flow->vlans[1], | |
2305 | sizeof(union flow_vlan_hdr) * (n - 1)); | |
f0fb825a | 2306 | } |
68c744fd BP |
2307 | if (n > 0) { |
2308 | memset(&flow->vlans[n - 1], 0, sizeof(union flow_vlan_hdr)); | |
f0fb825a | 2309 | } |
f0fb825a EG |
2310 | } |
2311 | ||
2312 | void | |
2313 | flow_push_vlan_uninit(struct flow *flow, struct flow_wildcards *wc) | |
2314 | { | |
2315 | if (wc) { | |
2316 | int n = flow_count_vlan_headers(flow); | |
6b6b508b DB |
2317 | if (n) { |
2318 | memset(wc->masks.vlans, 0xff, sizeof(union flow_vlan_hdr) * n); | |
2319 | } | |
f0fb825a EG |
2320 | } |
2321 | memmove(&flow->vlans[1], &flow->vlans[0], | |
2322 | sizeof(union flow_vlan_hdr) * (FLOW_MAX_VLAN_HEADERS - 1)); | |
2323 | memset(&flow->vlans[0], 0, sizeof(union flow_vlan_hdr)); | |
3719455c BP |
2324 | } |
2325 | ||
8bfd0fda BP |
2326 | /* Returns the number of MPLS LSEs present in 'flow' |
2327 | * | |
2328 | * Returns 0 if the 'dl_type' of 'flow' is not an MPLS ethernet type. | |
2329 | * Otherwise traverses 'flow''s MPLS label stack stopping at the | |
2330 | * first entry that has the BoS bit set. If no such entry exists then | |
2331 | * the maximum number of LSEs that can be stored in 'flow' is returned. | |
2332 | */ | |
2333 | int | |
2334 | flow_count_mpls_labels(const struct flow *flow, struct flow_wildcards *wc) | |
2335 | { | |
22d38fca | 2336 | /* dl_type is always masked. */ |
8bfd0fda BP |
2337 | if (eth_type_mpls(flow->dl_type)) { |
2338 | int i; | |
5af43325 | 2339 | int cnt; |
8bfd0fda | 2340 | |
5af43325 PS |
2341 | cnt = 0; |
2342 | for (i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { | |
8bfd0fda BP |
2343 | if (wc) { |
2344 | wc->masks.mpls_lse[i] |= htonl(MPLS_BOS_MASK); | |
2345 | } | |
2346 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
2347 | return i + 1; | |
2348 | } | |
5af43325 PS |
2349 | if (flow->mpls_lse[i]) { |
2350 | cnt++; | |
2351 | } | |
8bfd0fda | 2352 | } |
5af43325 | 2353 | return cnt; |
8bfd0fda BP |
2354 | } else { |
2355 | return 0; | |
2356 | } | |
2357 | } | |
2358 | ||
2359 | /* Returns the number consecutive of MPLS LSEs, starting at the | |
2360 | * innermost LSE, that are common in 'a' and 'b'. | |
2361 | * | |
2362 | * 'an' must be flow_count_mpls_labels(a). | |
2363 | * 'bn' must be flow_count_mpls_labels(b). | |
2364 | */ | |
2365 | int | |
2366 | flow_count_common_mpls_labels(const struct flow *a, int an, | |
2367 | const struct flow *b, int bn, | |
2368 | struct flow_wildcards *wc) | |
2369 | { | |
2370 | int min_n = MIN(an, bn); | |
2371 | if (min_n == 0) { | |
2372 | return 0; | |
2373 | } else { | |
2374 | int common_n = 0; | |
2375 | int a_last = an - 1; | |
2376 | int b_last = bn - 1; | |
2377 | int i; | |
2378 | ||
2379 | for (i = 0; i < min_n; i++) { | |
2380 | if (wc) { | |
2381 | wc->masks.mpls_lse[a_last - i] = OVS_BE32_MAX; | |
2382 | wc->masks.mpls_lse[b_last - i] = OVS_BE32_MAX; | |
2383 | } | |
2384 | if (a->mpls_lse[a_last - i] != b->mpls_lse[b_last - i]) { | |
2385 | break; | |
2386 | } else { | |
2387 | common_n++; | |
2388 | } | |
2389 | } | |
2390 | ||
2391 | return common_n; | |
2392 | } | |
2393 | } | |
2394 | ||
2395 | /* Adds a new outermost MPLS label to 'flow' and changes 'flow''s Ethernet type | |
2396 | * to 'mpls_eth_type', which must be an MPLS Ethertype. | |
2397 | * | |
2398 | * If the new label is the first MPLS label in 'flow', it is generated as; | |
2399 | * | |
2400 | * - label: 2, if 'flow' is IPv6, otherwise 0. | |
2401 | * | |
2402 | * - TTL: IPv4 or IPv6 TTL, if present and nonzero, otherwise 64. | |
2403 | * | |
2404 | * - TC: IPv4 or IPv6 TOS, if present, otherwise 0. | |
2405 | * | |
2406 | * - BoS: 1. | |
2407 | * | |
22d38fca | 2408 | * If the new label is the second or later label MPLS label in 'flow', it is |
8bfd0fda BP |
2409 | * generated as; |
2410 | * | |
368fb7e6 | 2411 | * - label: Copied from outer label. |
8bfd0fda BP |
2412 | * |
2413 | * - TTL: Copied from outer label. | |
2414 | * | |
2415 | * - TC: Copied from outer label. | |
2416 | * | |
2417 | * - BoS: 0. | |
2418 | * | |
2419 | * 'n' must be flow_count_mpls_labels(flow). 'n' must be less than | |
2420 | * FLOW_MAX_MPLS_LABELS (because otherwise flow->mpls_lse[] would overflow). | |
2421 | */ | |
2422 | void | |
2423 | flow_push_mpls(struct flow *flow, int n, ovs_be16 mpls_eth_type, | |
742c0ac3 | 2424 | struct flow_wildcards *wc, bool clear_flow_L3) |
8bfd0fda BP |
2425 | { |
2426 | ovs_assert(eth_type_mpls(mpls_eth_type)); | |
2427 | ovs_assert(n < FLOW_MAX_MPLS_LABELS); | |
2428 | ||
8bfd0fda BP |
2429 | if (n) { |
2430 | int i; | |
2431 | ||
22d38fca JR |
2432 | if (wc) { |
2433 | memset(&wc->masks.mpls_lse, 0xff, sizeof *wc->masks.mpls_lse * n); | |
2434 | } | |
8bfd0fda BP |
2435 | for (i = n; i >= 1; i--) { |
2436 | flow->mpls_lse[i] = flow->mpls_lse[i - 1]; | |
2437 | } | |
22d38fca | 2438 | flow->mpls_lse[0] = (flow->mpls_lse[1] & htonl(~MPLS_BOS_MASK)); |
8bfd0fda BP |
2439 | } else { |
2440 | int label = 0; /* IPv4 Explicit Null. */ | |
2441 | int tc = 0; | |
2442 | int ttl = 64; | |
2443 | ||
2444 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2445 | label = 2; | |
2446 | } | |
2447 | ||
2448 | if (is_ip_any(flow)) { | |
2449 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; | |
22d38fca JR |
2450 | if (wc) { |
2451 | wc->masks.nw_tos |= IP_DSCP_MASK; | |
2452 | wc->masks.nw_ttl = 0xff; | |
2453 | } | |
8bfd0fda BP |
2454 | |
2455 | if (flow->nw_ttl) { | |
2456 | ttl = flow->nw_ttl; | |
2457 | } | |
8bfd0fda BP |
2458 | } |
2459 | ||
2460 | flow->mpls_lse[0] = set_mpls_lse_values(ttl, tc, 1, htonl(label)); | |
2461 | ||
742c0ac3 JR |
2462 | if (clear_flow_L3) { |
2463 | /* Clear all L3 and L4 fields and dp_hash. */ | |
2482b0b0 | 2464 | BUILD_ASSERT(FLOW_WC_SEQ == 39); |
742c0ac3 JR |
2465 | memset((char *) flow + FLOW_SEGMENT_2_ENDS_AT, 0, |
2466 | sizeof(struct flow) - FLOW_SEGMENT_2_ENDS_AT); | |
2467 | flow->dp_hash = 0; | |
2468 | } | |
8bfd0fda BP |
2469 | } |
2470 | flow->dl_type = mpls_eth_type; | |
2471 | } | |
2472 | ||
2473 | /* Tries to remove the outermost MPLS label from 'flow'. Returns true if | |
2474 | * successful, false otherwise. On success, sets 'flow''s Ethernet type to | |
2475 | * 'eth_type'. | |
2476 | * | |
2477 | * 'n' must be flow_count_mpls_labels(flow). */ | |
2478 | bool | |
2479 | flow_pop_mpls(struct flow *flow, int n, ovs_be16 eth_type, | |
2480 | struct flow_wildcards *wc) | |
2481 | { | |
2482 | int i; | |
2483 | ||
2484 | if (n == 0) { | |
2485 | /* Nothing to pop. */ | |
2486 | return false; | |
22d38fca JR |
2487 | } else if (n == FLOW_MAX_MPLS_LABELS) { |
2488 | if (wc) { | |
2489 | wc->masks.mpls_lse[n - 1] |= htonl(MPLS_BOS_MASK); | |
2490 | } | |
2491 | if (!(flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK))) { | |
2492 | /* Can't pop because don't know what to fill in mpls_lse[n - 1]. */ | |
2493 | return false; | |
2494 | } | |
8bfd0fda BP |
2495 | } |
2496 | ||
22d38fca JR |
2497 | if (wc) { |
2498 | memset(&wc->masks.mpls_lse[1], 0xff, | |
2499 | sizeof *wc->masks.mpls_lse * (n - 1)); | |
2500 | } | |
8bfd0fda BP |
2501 | for (i = 1; i < n; i++) { |
2502 | flow->mpls_lse[i - 1] = flow->mpls_lse[i]; | |
2503 | } | |
2504 | flow->mpls_lse[n - 1] = 0; | |
2505 | flow->dl_type = eth_type; | |
2506 | return true; | |
2507 | } | |
2508 | ||
b02475c5 SH |
2509 | /* Sets the MPLS Label that 'flow' matches to 'label', which is interpreted |
2510 | * as an OpenFlow 1.1 "mpls_label" value. */ | |
2511 | void | |
8bfd0fda | 2512 | flow_set_mpls_label(struct flow *flow, int idx, ovs_be32 label) |
b02475c5 | 2513 | { |
8bfd0fda | 2514 | set_mpls_lse_label(&flow->mpls_lse[idx], label); |
b02475c5 SH |
2515 | } |
2516 | ||
b676167a SH |
2517 | /* Sets the MPLS TTL that 'flow' matches to 'ttl', which should be in the |
2518 | * range 0...255. */ | |
2519 | void | |
8bfd0fda | 2520 | flow_set_mpls_ttl(struct flow *flow, int idx, uint8_t ttl) |
b676167a | 2521 | { |
8bfd0fda | 2522 | set_mpls_lse_ttl(&flow->mpls_lse[idx], ttl); |
b676167a SH |
2523 | } |
2524 | ||
b02475c5 SH |
2525 | /* Sets the MPLS TC that 'flow' matches to 'tc', which should be in the |
2526 | * range 0...7. */ | |
2527 | void | |
8bfd0fda | 2528 | flow_set_mpls_tc(struct flow *flow, int idx, uint8_t tc) |
b02475c5 | 2529 | { |
8bfd0fda | 2530 | set_mpls_lse_tc(&flow->mpls_lse[idx], tc); |
b02475c5 SH |
2531 | } |
2532 | ||
2533 | /* Sets the MPLS BOS bit that 'flow' matches to which should be 0 or 1. */ | |
2534 | void | |
8bfd0fda | 2535 | flow_set_mpls_bos(struct flow *flow, int idx, uint8_t bos) |
b02475c5 | 2536 | { |
8bfd0fda | 2537 | set_mpls_lse_bos(&flow->mpls_lse[idx], bos); |
b02475c5 SH |
2538 | } |
2539 | ||
8bfd0fda BP |
2540 | /* Sets the entire MPLS LSE. */ |
2541 | void | |
2542 | flow_set_mpls_lse(struct flow *flow, int idx, ovs_be32 lse) | |
2543 | { | |
2544 | flow->mpls_lse[idx] = lse; | |
2545 | } | |
52105b67 | 2546 | |
437d0d22 | 2547 | static size_t |
cf62fa4c | 2548 | flow_compose_l4(struct dp_packet *p, const struct flow *flow) |
52105b67 | 2549 | { |
437d0d22 JR |
2550 | size_t l4_len = 0; |
2551 | ||
52105b67 JR |
2552 | if (!(flow->nw_frag & FLOW_NW_FRAG_ANY) |
2553 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) { | |
2554 | if (flow->nw_proto == IPPROTO_TCP) { | |
2555 | struct tcp_header *tcp; | |
2556 | ||
437d0d22 | 2557 | l4_len = sizeof *tcp; |
cf62fa4c | 2558 | tcp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2559 | tcp->tcp_src = flow->tp_src; |
2560 | tcp->tcp_dst = flow->tp_dst; | |
2561 | tcp->tcp_ctl = TCP_CTL(ntohs(flow->tcp_flags), 5); | |
52105b67 JR |
2562 | } else if (flow->nw_proto == IPPROTO_UDP) { |
2563 | struct udp_header *udp; | |
2564 | ||
437d0d22 | 2565 | l4_len = sizeof *udp; |
cf62fa4c | 2566 | udp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2567 | udp->udp_src = flow->tp_src; |
2568 | udp->udp_dst = flow->tp_dst; | |
e839d01e | 2569 | udp->udp_len = htons(l4_len); |
52105b67 JR |
2570 | } else if (flow->nw_proto == IPPROTO_SCTP) { |
2571 | struct sctp_header *sctp; | |
2572 | ||
437d0d22 | 2573 | l4_len = sizeof *sctp; |
cf62fa4c | 2574 | sctp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2575 | sctp->sctp_src = flow->tp_src; |
2576 | sctp->sctp_dst = flow->tp_dst; | |
52105b67 JR |
2577 | } else if (flow->nw_proto == IPPROTO_ICMP) { |
2578 | struct icmp_header *icmp; | |
2579 | ||
437d0d22 | 2580 | l4_len = sizeof *icmp; |
cf62fa4c | 2581 | icmp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2582 | icmp->icmp_type = ntohs(flow->tp_src); |
2583 | icmp->icmp_code = ntohs(flow->tp_dst); | |
0e612675 FL |
2584 | } else if (flow->nw_proto == IPPROTO_IGMP) { |
2585 | struct igmp_header *igmp; | |
2586 | ||
2587 | l4_len = sizeof *igmp; | |
cf62fa4c | 2588 | igmp = dp_packet_put_zeros(p, l4_len); |
0e612675 FL |
2589 | igmp->igmp_type = ntohs(flow->tp_src); |
2590 | igmp->igmp_code = ntohs(flow->tp_dst); | |
2591 | put_16aligned_be32(&igmp->group, flow->igmp_group_ip4); | |
52105b67 JR |
2592 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { |
2593 | struct icmp6_hdr *icmp; | |
2594 | ||
437d0d22 | 2595 | l4_len = sizeof *icmp; |
cf62fa4c | 2596 | icmp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2597 | icmp->icmp6_type = ntohs(flow->tp_src); |
2598 | icmp->icmp6_code = ntohs(flow->tp_dst); | |
2599 | ||
2600 | if (icmp->icmp6_code == 0 && | |
2601 | (icmp->icmp6_type == ND_NEIGHBOR_SOLICIT || | |
2602 | icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) { | |
2603 | struct in6_addr *nd_target; | |
86d46f3c | 2604 | struct ovs_nd_lla_opt *lla_opt; |
52105b67 | 2605 | |
437d0d22 | 2606 | l4_len += sizeof *nd_target; |
cf62fa4c | 2607 | nd_target = dp_packet_put_zeros(p, sizeof *nd_target); |
52105b67 JR |
2608 | *nd_target = flow->nd_target; |
2609 | ||
2610 | if (!eth_addr_is_zero(flow->arp_sha)) { | |
437d0d22 | 2611 | l4_len += 8; |
86d46f3c ZKL |
2612 | lla_opt = dp_packet_put_zeros(p, 8); |
2613 | lla_opt->len = 1; | |
2614 | lla_opt->type = ND_OPT_SOURCE_LINKADDR; | |
2615 | lla_opt->mac = flow->arp_sha; | |
52105b67 JR |
2616 | } |
2617 | if (!eth_addr_is_zero(flow->arp_tha)) { | |
437d0d22 | 2618 | l4_len += 8; |
86d46f3c ZKL |
2619 | lla_opt = dp_packet_put_zeros(p, 8); |
2620 | lla_opt->len = 1; | |
2621 | lla_opt->type = ND_OPT_TARGET_LINKADDR; | |
2622 | lla_opt->mac = flow->arp_tha; | |
52105b67 JR |
2623 | } |
2624 | } | |
52105b67 JR |
2625 | } |
2626 | } | |
437d0d22 | 2627 | return l4_len; |
52105b67 JR |
2628 | } |
2629 | ||
e839d01e DDP |
2630 | static void |
2631 | flow_compose_l4_csum(struct dp_packet *p, const struct flow *flow, | |
2632 | uint32_t pseudo_hdr_csum) | |
2633 | { | |
2634 | size_t l4_len = (char *) dp_packet_tail(p) - (char *) dp_packet_l4(p); | |
2635 | ||
2636 | if (!(flow->nw_frag & FLOW_NW_FRAG_ANY) | |
2637 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) { | |
2638 | if (flow->nw_proto == IPPROTO_TCP) { | |
2639 | struct tcp_header *tcp = dp_packet_l4(p); | |
2640 | ||
2641 | /* Checksum has already been zeroed by put_zeros call in | |
2642 | * flow_compose_l4(). */ | |
2643 | tcp->tcp_csum = csum_finish(csum_continue(pseudo_hdr_csum, | |
2644 | tcp, l4_len)); | |
2645 | } else if (flow->nw_proto == IPPROTO_UDP) { | |
2646 | struct udp_header *udp = dp_packet_l4(p); | |
2647 | ||
2648 | /* Checksum has already been zeroed by put_zeros call in | |
2649 | * flow_compose_l4(). */ | |
2650 | udp->udp_csum = csum_finish(csum_continue(pseudo_hdr_csum, | |
2651 | udp, l4_len)); | |
2652 | } else if (flow->nw_proto == IPPROTO_ICMP) { | |
2653 | struct icmp_header *icmp = dp_packet_l4(p); | |
2654 | ||
2655 | /* Checksum has already been zeroed by put_zeros call in | |
2656 | * flow_compose_l4(). */ | |
2657 | icmp->icmp_csum = csum(icmp, l4_len); | |
2658 | } else if (flow->nw_proto == IPPROTO_IGMP) { | |
2659 | struct igmp_header *igmp = dp_packet_l4(p); | |
2660 | ||
2661 | /* Checksum has already been zeroed by put_zeros call in | |
2662 | * flow_compose_l4(). */ | |
2663 | igmp->igmp_csum = csum(igmp, l4_len); | |
2664 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { | |
2665 | struct icmp6_hdr *icmp = dp_packet_l4(p); | |
2666 | ||
2667 | /* Checksum has already been zeroed by put_zeros call in | |
2668 | * flow_compose_l4(). */ | |
2669 | icmp->icmp6_cksum = (OVS_FORCE uint16_t) | |
2670 | csum_finish(csum_continue(pseudo_hdr_csum, icmp, l4_len)); | |
2671 | } | |
2672 | } | |
2673 | } | |
2674 | ||
3e24a894 | 2675 | /* Puts into 'p' a packet that flow_extract() would parse as having the given |
8b3b8dd1 BP |
2676 | * 'flow'. |
2677 | * | |
2678 | * (This is useful only for testing, obviously, and the packet isn't really | |
e839d01e | 2679 | * valid. Lots of fields are just zeroed.) */ |
8b3b8dd1 | 2680 | void |
cf62fa4c | 2681 | flow_compose(struct dp_packet *p, const struct flow *flow) |
8b3b8dd1 | 2682 | { |
e839d01e | 2683 | uint32_t pseudo_hdr_csum; |
437d0d22 JR |
2684 | size_t l4_len; |
2685 | ||
52105b67 | 2686 | /* eth_compose() sets l3 pointer and makes sure it is 32-bit aligned. */ |
cf62fa4c | 2687 | eth_compose(p, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0); |
8b3b8dd1 | 2688 | if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) { |
2482b0b0 | 2689 | struct eth_header *eth = dp_packet_eth(p); |
cf62fa4c | 2690 | eth->eth_type = htons(dp_packet_size(p)); |
8b3b8dd1 BP |
2691 | return; |
2692 | } | |
2693 | ||
f0fb825a EG |
2694 | for (int encaps = FLOW_MAX_VLAN_HEADERS - 1; encaps >= 0; encaps--) { |
2695 | if (flow->vlans[encaps].tci & htons(VLAN_CFI)) { | |
2696 | eth_push_vlan(p, flow->vlans[encaps].tpid, | |
2697 | flow->vlans[encaps].tci); | |
2698 | } | |
8b3b8dd1 BP |
2699 | } |
2700 | ||
cff78c88 | 2701 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
8b3b8dd1 BP |
2702 | struct ip_header *ip; |
2703 | ||
cf62fa4c | 2704 | ip = dp_packet_put_zeros(p, sizeof *ip); |
8b3b8dd1 | 2705 | ip->ip_ihl_ver = IP_IHL_VER(5, 4); |
eadef313 | 2706 | ip->ip_tos = flow->nw_tos; |
aabf5352 | 2707 | ip->ip_ttl = flow->nw_ttl; |
8b3b8dd1 | 2708 | ip->ip_proto = flow->nw_proto; |
7c457c33 BP |
2709 | put_16aligned_be32(&ip->ip_src, flow->nw_src); |
2710 | put_16aligned_be32(&ip->ip_dst, flow->nw_dst); | |
8b3b8dd1 | 2711 | |
eadef313 | 2712 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
7257b535 | 2713 | ip->ip_frag_off |= htons(IP_MORE_FRAGMENTS); |
eadef313 | 2714 | if (flow->nw_frag & FLOW_NW_FRAG_LATER) { |
7257b535 BP |
2715 | ip->ip_frag_off |= htons(100); |
2716 | } | |
2717 | } | |
df9b6612 | 2718 | |
cf62fa4c | 2719 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 2720 | |
cf62fa4c | 2721 | l4_len = flow_compose_l4(p, flow); |
52105b67 | 2722 | |
cf62fa4c PS |
2723 | ip = dp_packet_l3(p); |
2724 | ip->ip_tot_len = htons(p->l4_ofs - p->l3_ofs + l4_len); | |
ece9c294 | 2725 | /* Checksum has already been zeroed by put_zeros call. */ |
dc5a7ce7 | 2726 | ip->ip_csum = csum(ip, sizeof *ip); |
e839d01e DDP |
2727 | |
2728 | pseudo_hdr_csum = packet_csum_pseudoheader(ip); | |
2729 | flow_compose_l4_csum(p, flow, pseudo_hdr_csum); | |
cff78c88 | 2730 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
52105b67 JR |
2731 | struct ovs_16aligned_ip6_hdr *nh; |
2732 | ||
cf62fa4c | 2733 | nh = dp_packet_put_zeros(p, sizeof *nh); |
52105b67 JR |
2734 | put_16aligned_be32(&nh->ip6_flow, htonl(6 << 28) | |
2735 | htonl(flow->nw_tos << 20) | flow->ipv6_label); | |
2736 | nh->ip6_hlim = flow->nw_ttl; | |
2737 | nh->ip6_nxt = flow->nw_proto; | |
2738 | ||
2739 | memcpy(&nh->ip6_src, &flow->ipv6_src, sizeof(nh->ip6_src)); | |
2740 | memcpy(&nh->ip6_dst, &flow->ipv6_dst, sizeof(nh->ip6_dst)); | |
2741 | ||
cf62fa4c | 2742 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 2743 | |
cf62fa4c | 2744 | l4_len = flow_compose_l4(p, flow); |
52105b67 | 2745 | |
cf62fa4c | 2746 | nh = dp_packet_l3(p); |
437d0d22 | 2747 | nh->ip6_plen = htons(l4_len); |
e839d01e DDP |
2748 | |
2749 | pseudo_hdr_csum = packet_csum_pseudoheader6(nh); | |
2750 | flow_compose_l4_csum(p, flow, pseudo_hdr_csum); | |
cff78c88 SH |
2751 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
2752 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
8b3b8dd1 BP |
2753 | struct arp_eth_header *arp; |
2754 | ||
cf62fa4c PS |
2755 | arp = dp_packet_put_zeros(p, sizeof *arp); |
2756 | dp_packet_set_l3(p, arp); | |
8b3b8dd1 BP |
2757 | arp->ar_hrd = htons(1); |
2758 | arp->ar_pro = htons(ETH_TYPE_IP); | |
2759 | arp->ar_hln = ETH_ADDR_LEN; | |
2760 | arp->ar_pln = 4; | |
2761 | arp->ar_op = htons(flow->nw_proto); | |
2762 | ||
2763 | if (flow->nw_proto == ARP_OP_REQUEST || | |
2764 | flow->nw_proto == ARP_OP_REPLY) { | |
7c457c33 BP |
2765 | put_16aligned_be32(&arp->ar_spa, flow->nw_src); |
2766 | put_16aligned_be32(&arp->ar_tpa, flow->nw_dst); | |
74ff3298 JR |
2767 | arp->ar_sha = flow->arp_sha; |
2768 | arp->ar_tha = flow->arp_tha; | |
8b3b8dd1 BP |
2769 | } |
2770 | } | |
b02475c5 SH |
2771 | |
2772 | if (eth_type_mpls(flow->dl_type)) { | |
8bfd0fda BP |
2773 | int n; |
2774 | ||
cf62fa4c | 2775 | p->l2_5_ofs = p->l3_ofs; |
8bfd0fda BP |
2776 | for (n = 1; n < FLOW_MAX_MPLS_LABELS; n++) { |
2777 | if (flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK)) { | |
2778 | break; | |
2779 | } | |
2780 | } | |
2781 | while (n > 0) { | |
cf62fa4c | 2782 | push_mpls(p, flow->dl_type, flow->mpls_lse[--n]); |
8bfd0fda | 2783 | } |
b02475c5 | 2784 | } |
8b3b8dd1 | 2785 | } |
5cb7a798 BP |
2786 | \f |
2787 | /* Compressed flow. */ | |
2788 | ||
df40c152 | 2789 | /* Completes an initialization of 'dst' as a miniflow copy of 'src' begun by |
5fcff47b JR |
2790 | * the caller. The caller must have already computed 'dst->map' properly to |
2791 | * indicate the significant uint64_t elements of 'src'. | |
13751fd8 JR |
2792 | * |
2793 | * Normally the significant elements are the ones that are non-zero. However, | |
2794 | * when a miniflow is initialized from a (mini)mask, the values can be zeroes, | |
ceb3bd67 JR |
2795 | * so that the flow and mask always have the same maps. */ |
2796 | void | |
2797 | miniflow_init(struct miniflow *dst, const struct flow *src) | |
df40c152 | 2798 | { |
09b0fa9c | 2799 | uint64_t *dst_u64 = miniflow_values(dst); |
361d808d | 2800 | size_t idx; |
df40c152 | 2801 | |
5fcff47b JR |
2802 | FLOWMAP_FOR_EACH_INDEX(idx, dst->map) { |
2803 | *dst_u64++ = flow_u64_value(src, idx); | |
df40c152 BP |
2804 | } |
2805 | } | |
2806 | ||
361d808d | 2807 | /* Initialize the maps of 'flow' from 'src'. */ |
ceb3bd67 JR |
2808 | void |
2809 | miniflow_map_init(struct miniflow *flow, const struct flow *src) | |
5cb7a798 | 2810 | { |
ceb3bd67 | 2811 | /* Initialize map, counting the number of nonzero elements. */ |
5fcff47b JR |
2812 | flowmap_init(&flow->map); |
2813 | for (size_t i = 0; i < FLOW_U64S; i++) { | |
2814 | if (flow_u64_value(src, i)) { | |
2815 | flowmap_set(&flow->map, i, 1); | |
5cb7a798 BP |
2816 | } |
2817 | } | |
ceb3bd67 | 2818 | } |
5cb7a798 | 2819 | |
ceb3bd67 JR |
2820 | /* Allocates 'n' count of miniflows, consecutive in memory, initializing the |
2821 | * map of each from 'src'. | |
2822 | * Returns the size of the miniflow data. */ | |
2823 | size_t | |
2824 | miniflow_alloc(struct miniflow *dsts[], size_t n, const struct miniflow *src) | |
2825 | { | |
361d808d JR |
2826 | size_t n_values = miniflow_n_values(src); |
2827 | size_t data_size = MINIFLOW_VALUES_SIZE(n_values); | |
2828 | struct miniflow *dst = xmalloc(n * (sizeof *src + data_size)); | |
5fcff47b | 2829 | size_t i; |
ceb3bd67 JR |
2830 | |
2831 | COVERAGE_INC(miniflow_malloc); | |
2832 | ||
2833 | for (i = 0; i < n; i++) { | |
361d808d | 2834 | *dst = *src; /* Copy maps. */ |
ceb3bd67 | 2835 | dsts[i] = dst; |
361d808d JR |
2836 | dst += 1; /* Just past the maps. */ |
2837 | dst = (struct miniflow *)((uint64_t *)dst + n_values); /* Skip data. */ | |
ceb3bd67 JR |
2838 | } |
2839 | return data_size; | |
df40c152 | 2840 | } |
5cb7a798 | 2841 | |
ceb3bd67 JR |
2842 | /* Returns a miniflow copy of 'src'. The caller must eventually free() the |
2843 | * returned miniflow. */ | |
8fd47924 | 2844 | struct miniflow * |
ceb3bd67 | 2845 | miniflow_create(const struct flow *src) |
df40c152 | 2846 | { |
ceb3bd67 JR |
2847 | struct miniflow tmp; |
2848 | struct miniflow *dst; | |
2849 | ||
2850 | miniflow_map_init(&tmp, src); | |
2851 | ||
2852 | miniflow_alloc(&dst, 1, &tmp); | |
2853 | miniflow_init(dst, src); | |
2854 | return dst; | |
5cb7a798 BP |
2855 | } |
2856 | ||
3016f3e4 | 2857 | /* Initializes 'dst' as a copy of 'src'. The caller must have allocated |
8fd47924 | 2858 | * 'dst' to have inline space for 'n_values' data in 'src'. */ |
3016f3e4 | 2859 | void |
a851eb94 JR |
2860 | miniflow_clone(struct miniflow *dst, const struct miniflow *src, |
2861 | size_t n_values) | |
3016f3e4 | 2862 | { |
361d808d | 2863 | *dst = *src; /* Copy maps. */ |
09b0fa9c JR |
2864 | memcpy(miniflow_values(dst), miniflow_get_values(src), |
2865 | MINIFLOW_VALUES_SIZE(n_values)); | |
5cb7a798 BP |
2866 | } |
2867 | ||
2868 | /* Initializes 'dst' as a copy of 'src'. */ | |
2869 | void | |
2870 | miniflow_expand(const struct miniflow *src, struct flow *dst) | |
2871 | { | |
ad77e3c5 EJ |
2872 | memset(dst, 0, sizeof *dst); |
2873 | flow_union_with_miniflow(dst, src); | |
5cb7a798 BP |
2874 | } |
2875 | ||
8fd47924 | 2876 | /* Returns true if 'a' and 'b' are equal miniflows, false otherwise. */ |
5cb7a798 BP |
2877 | bool |
2878 | miniflow_equal(const struct miniflow *a, const struct miniflow *b) | |
2879 | { | |
09b0fa9c JR |
2880 | const uint64_t *ap = miniflow_get_values(a); |
2881 | const uint64_t *bp = miniflow_get_values(b); | |
5cb7a798 | 2882 | |
5fcff47b JR |
2883 | /* This is mostly called after a matching hash, so it is highly likely that |
2884 | * the maps are equal as well. */ | |
2885 | if (OVS_LIKELY(flowmap_equal(a->map, b->map))) { | |
361d808d | 2886 | return !memcmp(ap, bp, miniflow_n_values(a) * sizeof *ap); |
080e28d0 | 2887 | } else { |
5fcff47b | 2888 | size_t idx; |
df40c152 | 2889 | |
5fcff47b JR |
2890 | FLOWMAP_FOR_EACH_INDEX (idx, flowmap_or(a->map, b->map)) { |
2891 | if ((flowmap_is_set(&a->map, idx) ? *ap++ : 0) | |
2892 | != (flowmap_is_set(&b->map, idx) ? *bp++ : 0)) { | |
080e28d0 | 2893 | return false; |
df40c152 | 2894 | } |
5cb7a798 BP |
2895 | } |
2896 | } | |
2897 | ||
df40c152 | 2898 | return true; |
5cb7a798 BP |
2899 | } |
2900 | ||
de4ad4a2 JR |
2901 | /* Returns false if 'a' and 'b' differ at the places where there are 1-bits |
2902 | * in 'mask', true otherwise. */ | |
5cb7a798 BP |
2903 | bool |
2904 | miniflow_equal_in_minimask(const struct miniflow *a, const struct miniflow *b, | |
2905 | const struct minimask *mask) | |
2906 | { | |
09b0fa9c | 2907 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 2908 | size_t idx; |
5cb7a798 | 2909 | |
5fcff47b | 2910 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
1cea007c | 2911 | if ((miniflow_get(a, idx) ^ miniflow_get(b, idx)) & *p++) { |
080e28d0 | 2912 | return false; |
5cb7a798 BP |
2913 | } |
2914 | } | |
2915 | ||
2916 | return true; | |
2917 | } | |
2918 | ||
2919 | /* Returns true if 'a' and 'b' are equal at the places where there are 1-bits | |
2920 | * in 'mask', false if they differ. */ | |
2921 | bool | |
2922 | miniflow_equal_flow_in_minimask(const struct miniflow *a, const struct flow *b, | |
2923 | const struct minimask *mask) | |
2924 | { | |
09b0fa9c | 2925 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 2926 | size_t idx; |
5cb7a798 | 2927 | |
5fcff47b JR |
2928 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
2929 | if ((miniflow_get(a, idx) ^ flow_u64_value(b, idx)) & *p++) { | |
080e28d0 | 2930 | return false; |
5cb7a798 BP |
2931 | } |
2932 | } | |
2933 | ||
2934 | return true; | |
2935 | } | |
2936 | ||
5cb7a798 | 2937 | \f |
ceb3bd67 JR |
2938 | void |
2939 | minimask_init(struct minimask *mask, const struct flow_wildcards *wc) | |
2940 | { | |
2941 | miniflow_init(&mask->masks, &wc->masks); | |
2942 | } | |
2943 | ||
8fd47924 JR |
2944 | /* Returns a minimask copy of 'wc'. The caller must eventually free the |
2945 | * returned minimask with free(). */ | |
2946 | struct minimask * | |
2947 | minimask_create(const struct flow_wildcards *wc) | |
5cb7a798 | 2948 | { |
8fd47924 | 2949 | return (struct minimask *)miniflow_create(&wc->masks); |
5cb7a798 BP |
2950 | } |
2951 | ||
2952 | /* Initializes 'dst_' as the bit-wise "and" of 'a_' and 'b_'. | |
2953 | * | |
8fd47924 JR |
2954 | * The caller must provide room for FLOW_U64S "uint64_t"s in 'storage', which |
2955 | * must follow '*dst_' in memory, for use by 'dst_'. The caller must *not* | |
2956 | * free 'dst_' free(). */ | |
5cb7a798 BP |
2957 | void |
2958 | minimask_combine(struct minimask *dst_, | |
2959 | const struct minimask *a_, const struct minimask *b_, | |
d70e8c28 | 2960 | uint64_t storage[FLOW_U64S]) |
5cb7a798 BP |
2961 | { |
2962 | struct miniflow *dst = &dst_->masks; | |
d70e8c28 | 2963 | uint64_t *dst_values = storage; |
5cb7a798 BP |
2964 | const struct miniflow *a = &a_->masks; |
2965 | const struct miniflow *b = &b_->masks; | |
361d808d | 2966 | size_t idx; |
5cb7a798 | 2967 | |
5fcff47b | 2968 | flowmap_init(&dst->map); |
080e28d0 | 2969 | |
5fcff47b | 2970 | FLOWMAP_FOR_EACH_INDEX(idx, flowmap_and(a->map, b->map)) { |
361d808d | 2971 | /* Both 'a' and 'b' have non-zero data at 'idx'. */ |
5fcff47b | 2972 | uint64_t mask = *miniflow_get__(a, idx) & *miniflow_get__(b, idx); |
361d808d JR |
2973 | |
2974 | if (mask) { | |
5fcff47b | 2975 | flowmap_set(&dst->map, idx, 1); |
1cea007c | 2976 | *dst_values++ = mask; |
5cb7a798 BP |
2977 | } |
2978 | } | |
2979 | } | |
2980 | ||
8fd47924 | 2981 | /* Initializes 'wc' as a copy of 'mask'. */ |
5cb7a798 BP |
2982 | void |
2983 | minimask_expand(const struct minimask *mask, struct flow_wildcards *wc) | |
2984 | { | |
2985 | miniflow_expand(&mask->masks, &wc->masks); | |
2986 | } | |
2987 | ||
f4d335e9 JR |
2988 | /* Returns true if 'a' and 'b' are the same flow mask, false otherwise. |
2989 | * Minimasks may not have zero data values, so for the minimasks to be the | |
2990 | * same, they need to have the same map and the same data values. */ | |
5cb7a798 BP |
2991 | bool |
2992 | minimask_equal(const struct minimask *a, const struct minimask *b) | |
2993 | { | |
5fcff47b JR |
2994 | return !memcmp(a, b, sizeof *a |
2995 | + MINIFLOW_VALUES_SIZE(miniflow_n_values(&a->masks))); | |
5cb7a798 BP |
2996 | } |
2997 | ||
d4570fd8 | 2998 | /* Returns true if at least one bit matched by 'b' is wildcarded by 'a', |
5cb7a798 BP |
2999 | * false otherwise. */ |
3000 | bool | |
d4570fd8 | 3001 | minimask_has_extra(const struct minimask *a, const struct minimask *b) |
5cb7a798 | 3002 | { |
09b0fa9c | 3003 | const uint64_t *bp = miniflow_get_values(&b->masks); |
361d808d | 3004 | size_t idx; |
5cb7a798 | 3005 | |
5fcff47b | 3006 | FLOWMAP_FOR_EACH_INDEX(idx, b->masks.map) { |
d70e8c28 | 3007 | uint64_t b_u64 = *bp++; |
5cb7a798 | 3008 | |
d70e8c28 JR |
3009 | /* 'b_u64' is non-zero, check if the data in 'a' is either zero |
3010 | * or misses some of the bits in 'b_u64'. */ | |
5fcff47b JR |
3011 | if (!MINIFLOW_IN_MAP(&a->masks, idx) |
3012 | || ((*miniflow_get__(&a->masks, idx) & b_u64) != b_u64)) { | |
f4d335e9 | 3013 | return true; /* 'a' wildcards some bits 'b' doesn't. */ |
5cb7a798 BP |
3014 | } |
3015 | } | |
3016 | ||
3017 | return false; | |
3018 | } | |
f0fb825a EG |
3019 | |
3020 | void | |
3021 | flow_limit_vlans(int vlan_limit) | |
3022 | { | |
3023 | if (vlan_limit <= 0) { | |
3024 | flow_vlan_limit = FLOW_MAX_VLAN_HEADERS; | |
3025 | } else { | |
3026 | flow_vlan_limit = MIN(vlan_limit, FLOW_MAX_VLAN_HEADERS); | |
3027 | } | |
3028 | } |