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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" |
3d2fbd70 | 43 | #include "openvswitch/nsh.h" |
064af421 | 44 | |
d76f09ea | 45 | COVERAGE_DEFINE(flow_extract); |
5cb7a798 | 46 | COVERAGE_DEFINE(miniflow_malloc); |
d76f09ea | 47 | |
d70e8c28 JR |
48 | /* U64 indices for segmented flow classification. */ |
49 | const uint8_t flow_segment_u64s[4] = { | |
50 | FLOW_SEGMENT_1_ENDS_AT / sizeof(uint64_t), | |
51 | FLOW_SEGMENT_2_ENDS_AT / sizeof(uint64_t), | |
52 | FLOW_SEGMENT_3_ENDS_AT / sizeof(uint64_t), | |
53 | FLOW_U64S | |
476f36e8 JR |
54 | }; |
55 | ||
f0fb825a EG |
56 | int flow_vlan_limit = FLOW_MAX_VLAN_HEADERS; |
57 | ||
268eca11 BP |
58 | /* Asserts that field 'f1' follows immediately after 'f0' in struct flow, |
59 | * without any intervening padding. */ | |
60 | #define ASSERT_SEQUENTIAL(f0, f1) \ | |
61 | BUILD_ASSERT_DECL(offsetof(struct flow, f0) \ | |
62 | + MEMBER_SIZEOF(struct flow, f0) \ | |
63 | == offsetof(struct flow, f1)) | |
64 | ||
65 | /* Asserts that fields 'f0' and 'f1' are in the same 32-bit aligned word within | |
66 | * struct flow. */ | |
67 | #define ASSERT_SAME_WORD(f0, f1) \ | |
68 | BUILD_ASSERT_DECL(offsetof(struct flow, f0) / 4 \ | |
69 | == offsetof(struct flow, f1) / 4) | |
70 | ||
71 | /* Asserts that 'f0' and 'f1' are both sequential and within the same 32-bit | |
72 | * aligned word in struct flow. */ | |
73 | #define ASSERT_SEQUENTIAL_SAME_WORD(f0, f1) \ | |
74 | ASSERT_SEQUENTIAL(f0, f1); \ | |
75 | ASSERT_SAME_WORD(f0, f1) | |
76 | ||
419681da JR |
77 | /* miniflow_extract() assumes the following to be true to optimize the |
78 | * extraction process. */ | |
268eca11 BP |
79 | ASSERT_SEQUENTIAL_SAME_WORD(nw_frag, nw_tos); |
80 | ASSERT_SEQUENTIAL_SAME_WORD(nw_tos, nw_ttl); | |
81 | ASSERT_SEQUENTIAL_SAME_WORD(nw_ttl, nw_proto); | |
419681da | 82 | |
d70e8c28 JR |
83 | /* TCP flags in the middle of a BE64, zeroes in the other half. */ |
84 | BUILD_ASSERT_DECL(offsetof(struct flow, tcp_flags) % 8 == 4); | |
85 | ||
419681da JR |
86 | #if WORDS_BIGENDIAN |
87 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl) \ | |
88 | << 16) | |
89 | #else | |
90 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl)) | |
91 | #endif | |
92 | ||
268eca11 | 93 | ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst); |
419681da JR |
94 | |
95 | /* Removes 'size' bytes from the head end of '*datap', of size '*sizep', which | |
96 | * must contain at least 'size' bytes of data. Returns the first byte of data | |
97 | * removed. */ | |
98 | static inline const void * | |
4c0e587c | 99 | data_pull(const void **datap, size_t *sizep, size_t size) |
a26ef517 | 100 | { |
4c0e587c | 101 | const char *data = *datap; |
419681da JR |
102 | *datap = data + size; |
103 | *sizep -= size; | |
104 | return data; | |
a26ef517 JP |
105 | } |
106 | ||
419681da JR |
107 | /* If '*datap' has at least 'size' bytes of data, removes that many bytes from |
108 | * the head end of '*datap' and returns the first byte removed. Otherwise, | |
109 | * returns a null pointer without modifying '*datap'. */ | |
110 | static inline const void * | |
4c0e587c | 111 | data_try_pull(const void **datap, size_t *sizep, size_t size) |
064af421 | 112 | { |
419681da | 113 | return OVS_LIKELY(*sizep >= size) ? data_pull(datap, sizep, size) : NULL; |
064af421 BP |
114 | } |
115 | ||
419681da JR |
116 | /* Context for pushing data to a miniflow. */ |
117 | struct mf_ctx { | |
5fcff47b | 118 | struct flowmap map; |
d70e8c28 JR |
119 | uint64_t *data; |
120 | uint64_t * const end; | |
419681da | 121 | }; |
064af421 | 122 | |
419681da JR |
123 | /* miniflow_push_* macros allow filling in a miniflow data values in order. |
124 | * Assertions are needed only when the layout of the struct flow is modified. | |
125 | * 'ofs' is a compile-time constant, which allows most of the code be optimized | |
694ffecc | 126 | * away. Some GCC versions gave warnings on ALWAYS_INLINE, so these are |
419681da JR |
127 | * defined as macros. */ |
128 | ||
3d2fbd70 | 129 | #if (FLOW_WC_SEQ != 40) |
419681da | 130 | #define MINIFLOW_ASSERT(X) ovs_assert(X) |
dce96af8 DDP |
131 | BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime " |
132 | "assertions enabled. Consider updating FLOW_WC_SEQ after " | |
133 | "testing") | |
419681da JR |
134 | #else |
135 | #define MINIFLOW_ASSERT(X) | |
136 | #endif | |
137 | ||
5fcff47b JR |
138 | /* True if 'IDX' and higher bits are not set. */ |
139 | #define ASSERT_FLOWMAP_NOT_SET(FM, IDX) \ | |
c2581ccf | 140 | { \ |
5fcff47b | 141 | MINIFLOW_ASSERT(!((FM)->bits[(IDX) / MAP_T_BITS] & \ |
e807a1a6 | 142 | (MAP_MAX << ((IDX) % MAP_T_BITS)))); \ |
5fcff47b JR |
143 | for (size_t i = (IDX) / MAP_T_BITS + 1; i < FLOWMAP_UNITS; i++) { \ |
144 | MINIFLOW_ASSERT(!(FM)->bits[i]); \ | |
c2581ccf JR |
145 | } \ |
146 | } | |
361d808d | 147 | |
5fcff47b JR |
148 | #define miniflow_set_map(MF, OFS) \ |
149 | { \ | |
150 | ASSERT_FLOWMAP_NOT_SET(&MF.map, (OFS)); \ | |
151 | flowmap_set(&MF.map, (OFS), 1); \ | |
c2581ccf | 152 | } |
361d808d | 153 | |
e807a1a6 SH |
154 | #define miniflow_assert_in_map(MF, OFS) \ |
155 | MINIFLOW_ASSERT(flowmap_is_set(&MF.map, (OFS))); \ | |
5fcff47b JR |
156 | ASSERT_FLOWMAP_NOT_SET(&MF.map, (OFS) + 1) |
157 | ||
158 | #define miniflow_push_uint64_(MF, OFS, VALUE) \ | |
159 | { \ | |
160 | MINIFLOW_ASSERT(MF.data < MF.end && (OFS) % 8 == 0); \ | |
161 | *MF.data++ = VALUE; \ | |
162 | miniflow_set_map(MF, OFS / 8); \ | |
d31f1109 JP |
163 | } |
164 | ||
5fcff47b | 165 | #define miniflow_push_be64_(MF, OFS, VALUE) \ |
d70e8c28 | 166 | miniflow_push_uint64_(MF, OFS, (OVS_FORCE uint64_t)(VALUE)) |
419681da | 167 | |
5fcff47b JR |
168 | #define miniflow_push_uint32_(MF, OFS, VALUE) \ |
169 | { \ | |
170 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
171 | \ | |
172 | if ((OFS) % 8 == 0) { \ | |
173 | miniflow_set_map(MF, OFS / 8); \ | |
174 | *(uint32_t *)MF.data = VALUE; \ | |
175 | } else if ((OFS) % 8 == 4) { \ | |
176 | miniflow_assert_in_map(MF, OFS / 8); \ | |
177 | *((uint32_t *)MF.data + 1) = VALUE; \ | |
178 | MF.data++; \ | |
179 | } \ | |
d70e8c28 JR |
180 | } |
181 | ||
182 | #define miniflow_push_be32_(MF, OFS, VALUE) \ | |
183 | miniflow_push_uint32_(MF, OFS, (OVS_FORCE uint32_t)(VALUE)) | |
184 | ||
5fcff47b JR |
185 | #define miniflow_push_uint16_(MF, OFS, VALUE) \ |
186 | { \ | |
187 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
188 | \ | |
189 | if ((OFS) % 8 == 0) { \ | |
190 | miniflow_set_map(MF, OFS / 8); \ | |
191 | *(uint16_t *)MF.data = VALUE; \ | |
192 | } else if ((OFS) % 8 == 2) { \ | |
193 | miniflow_assert_in_map(MF, OFS / 8); \ | |
194 | *((uint16_t *)MF.data + 1) = VALUE; \ | |
195 | } else if ((OFS) % 8 == 4) { \ | |
196 | miniflow_assert_in_map(MF, OFS / 8); \ | |
197 | *((uint16_t *)MF.data + 2) = VALUE; \ | |
198 | } else if ((OFS) % 8 == 6) { \ | |
199 | miniflow_assert_in_map(MF, OFS / 8); \ | |
200 | *((uint16_t *)MF.data + 3) = VALUE; \ | |
201 | MF.data++; \ | |
202 | } \ | |
203 | } | |
204 | ||
1dcf9ac7 SH |
205 | #define miniflow_push_uint8_(MF, OFS, VALUE) \ |
206 | { \ | |
207 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
208 | \ | |
209 | if ((OFS) % 8 == 0) { \ | |
210 | miniflow_set_map(MF, OFS / 8); \ | |
211 | *(uint8_t *)MF.data = VALUE; \ | |
212 | } else if ((OFS) % 8 == 7) { \ | |
213 | miniflow_assert_in_map(MF, OFS / 8); \ | |
214 | *((uint8_t *)MF.data + 7) = VALUE; \ | |
215 | MF.data++; \ | |
216 | } else { \ | |
217 | miniflow_assert_in_map(MF, OFS / 8); \ | |
218 | *((uint8_t *)MF.data + ((OFS) % 8)) = VALUE; \ | |
219 | } \ | |
220 | } | |
221 | ||
5fcff47b JR |
222 | #define miniflow_pad_to_64_(MF, OFS) \ |
223 | { \ | |
224 | MINIFLOW_ASSERT((OFS) % 8 != 0); \ | |
225 | miniflow_assert_in_map(MF, OFS / 8); \ | |
226 | \ | |
227 | memset((uint8_t *)MF.data + (OFS) % 8, 0, 8 - (OFS) % 8); \ | |
228 | MF.data++; \ | |
d70e8c28 JR |
229 | } |
230 | ||
1589ee5a SH |
231 | #define miniflow_pad_from_64_(MF, OFS) \ |
232 | { \ | |
233 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
234 | \ | |
235 | MINIFLOW_ASSERT((OFS) % 8 != 0); \ | |
236 | miniflow_set_map(MF, OFS / 8); \ | |
237 | \ | |
238 | memset((uint8_t *)MF.data, 0, (OFS) % 8); \ | |
239 | } | |
240 | ||
d70e8c28 | 241 | #define miniflow_push_be16_(MF, OFS, VALUE) \ |
419681da JR |
242 | miniflow_push_uint16_(MF, OFS, (OVS_FORCE uint16_t)VALUE); |
243 | ||
1dcf9ac7 SH |
244 | #define miniflow_push_be8_(MF, OFS, VALUE) \ |
245 | miniflow_push_uint8_(MF, OFS, (OVS_FORCE uint8_t)VALUE); | |
246 | ||
5fcff47b JR |
247 | #define miniflow_set_maps(MF, OFS, N_WORDS) \ |
248 | { \ | |
249 | size_t ofs = (OFS); \ | |
250 | size_t n_words = (N_WORDS); \ | |
251 | \ | |
252 | MINIFLOW_ASSERT(n_words && MF.data + n_words <= MF.end); \ | |
253 | ASSERT_FLOWMAP_NOT_SET(&MF.map, ofs); \ | |
254 | flowmap_set(&MF.map, ofs, n_words); \ | |
361d808d JR |
255 | } |
256 | ||
419681da JR |
257 | /* Data at 'valuep' may be unaligned. */ |
258 | #define miniflow_push_words_(MF, OFS, VALUEP, N_WORDS) \ | |
259 | { \ | |
361d808d JR |
260 | MINIFLOW_ASSERT((OFS) % 8 == 0); \ |
261 | miniflow_set_maps(MF, (OFS) / 8, (N_WORDS)); \ | |
262 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof *MF.data); \ | |
263 | MF.data += (N_WORDS); \ | |
064af421 BP |
264 | } |
265 | ||
d70e8c28 JR |
266 | /* Push 32-bit words padded to 64-bits. */ |
267 | #define miniflow_push_words_32_(MF, OFS, VALUEP, N_WORDS) \ | |
268 | { \ | |
361d808d | 269 | miniflow_set_maps(MF, (OFS) / 8, DIV_ROUND_UP(N_WORDS, 2)); \ |
d70e8c28 JR |
270 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof(uint32_t)); \ |
271 | MF.data += DIV_ROUND_UP(N_WORDS, 2); \ | |
d70e8c28 JR |
272 | if ((N_WORDS) & 1) { \ |
273 | *((uint32_t *)MF.data - 1) = 0; \ | |
274 | } \ | |
275 | } | |
50f06e16 | 276 | |
d70e8c28 JR |
277 | /* Data at 'valuep' may be unaligned. */ |
278 | /* MACs start 64-aligned, and must be followed by other data or padding. */ | |
279 | #define miniflow_push_macs_(MF, OFS, VALUEP) \ | |
280 | { \ | |
361d808d | 281 | miniflow_set_maps(MF, (OFS) / 8, 2); \ |
d70e8c28 JR |
282 | memcpy(MF.data, (VALUEP), 2 * ETH_ADDR_LEN); \ |
283 | MF.data += 1; /* First word only. */ \ | |
d70e8c28 | 284 | } |
50f06e16 | 285 | |
d70e8c28 JR |
286 | #define miniflow_push_uint32(MF, FIELD, VALUE) \ |
287 | miniflow_push_uint32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 288 | |
d70e8c28 JR |
289 | #define miniflow_push_be32(MF, FIELD, VALUE) \ |
290 | miniflow_push_be32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 291 | |
d70e8c28 | 292 | #define miniflow_push_uint16(MF, FIELD, VALUE) \ |
419681da | 293 | miniflow_push_uint16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 294 | |
d70e8c28 | 295 | #define miniflow_push_be16(MF, FIELD, VALUE) \ |
419681da | 296 | miniflow_push_be16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 297 | |
1dcf9ac7 SH |
298 | #define miniflow_push_uint8(MF, FIELD, VALUE) \ |
299 | miniflow_push_uint8_(MF, offsetof(struct flow, FIELD), VALUE) | |
300 | ||
d70e8c28 | 301 | #define miniflow_pad_to_64(MF, FIELD) \ |
06f41fc4 | 302 | miniflow_pad_to_64_(MF, OFFSETOFEND(struct flow, FIELD)) |
d70e8c28 | 303 | |
1589ee5a SH |
304 | #define miniflow_pad_from_64(MF, FIELD) \ |
305 | miniflow_pad_from_64_(MF, offsetof(struct flow, FIELD)) | |
306 | ||
419681da JR |
307 | #define miniflow_push_words(MF, FIELD, VALUEP, N_WORDS) \ |
308 | miniflow_push_words_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
064af421 | 309 | |
d70e8c28 JR |
310 | #define miniflow_push_words_32(MF, FIELD, VALUEP, N_WORDS) \ |
311 | miniflow_push_words_32_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
312 | ||
313 | #define miniflow_push_macs(MF, FIELD, VALUEP) \ | |
314 | miniflow_push_macs_(MF, offsetof(struct flow, FIELD), VALUEP) | |
315 | ||
daf4d3c1 JR |
316 | /* Return the pointer to the miniflow data when called BEFORE the corresponding |
317 | * push. */ | |
318 | #define miniflow_pointer(MF, FIELD) \ | |
319 | (void *)((uint8_t *)MF.data + ((offsetof(struct flow, FIELD)) % 8)) | |
320 | ||
419681da JR |
321 | /* Pulls the MPLS headers at '*datap' and returns the count of them. */ |
322 | static inline int | |
4c0e587c | 323 | parse_mpls(const void **datap, size_t *sizep) |
d31f1109 | 324 | { |
419681da JR |
325 | const struct mpls_hdr *mh; |
326 | int count = 0; | |
d31f1109 | 327 | |
419681da JR |
328 | while ((mh = data_try_pull(datap, sizep, sizeof *mh))) { |
329 | count++; | |
330 | if (mh->mpls_lse.lo & htons(1 << MPLS_BOS_SHIFT)) { | |
d31f1109 JP |
331 | break; |
332 | } | |
419681da | 333 | } |
ba8561c6 | 334 | return MIN(count, FLOW_MAX_MPLS_LABELS); |
419681da | 335 | } |
d31f1109 | 336 | |
f0fb825a EG |
337 | /* passed vlan_hdrs arg must be at least size FLOW_MAX_VLAN_HEADERS. */ |
338 | static inline ALWAYS_INLINE size_t | |
339 | parse_vlan(const void **datap, size_t *sizep, union flow_vlan_hdr *vlan_hdrs) | |
419681da | 340 | { |
f0fb825a | 341 | const ovs_be16 *eth_type; |
d31f1109 | 342 | |
f0fb825a | 343 | memset(vlan_hdrs, 0, sizeof(union flow_vlan_hdr) * FLOW_MAX_VLAN_HEADERS); |
419681da | 344 | data_pull(datap, sizep, ETH_ADDR_LEN * 2); |
d31f1109 | 345 | |
f0fb825a EG |
346 | eth_type = *datap; |
347 | ||
348 | size_t n; | |
349 | for (n = 0; eth_type_vlan(*eth_type) && n < flow_vlan_limit; n++) { | |
350 | if (OVS_UNLIKELY(*sizep < sizeof(ovs_be32) + sizeof(ovs_be16))) { | |
351 | break; | |
d31f1109 | 352 | } |
f0fb825a EG |
353 | |
354 | const ovs_16aligned_be32 *qp = data_pull(datap, sizep, sizeof *qp); | |
355 | vlan_hdrs[n].qtag = get_16aligned_be32(qp); | |
356 | vlan_hdrs[n].tci |= htons(VLAN_CFI); | |
357 | eth_type = *datap; | |
d31f1109 | 358 | } |
f0fb825a | 359 | return n; |
d31f1109 JP |
360 | } |
361 | ||
206b60d4 | 362 | static inline ALWAYS_INLINE ovs_be16 |
4c0e587c | 363 | parse_ethertype(const void **datap, size_t *sizep) |
88366484 | 364 | { |
419681da JR |
365 | const struct llc_snap_header *llc; |
366 | ovs_be16 proto; | |
5a51b2cd | 367 | |
419681da JR |
368 | proto = *(ovs_be16 *) data_pull(datap, sizep, sizeof proto); |
369 | if (OVS_LIKELY(ntohs(proto) >= ETH_TYPE_MIN)) { | |
370 | return proto; | |
88366484 | 371 | } |
5a51b2cd | 372 | |
419681da JR |
373 | if (OVS_UNLIKELY(*sizep < sizeof *llc)) { |
374 | return htons(FLOW_DL_TYPE_NONE); | |
88366484 | 375 | } |
5a51b2cd | 376 | |
419681da JR |
377 | llc = *datap; |
378 | if (OVS_UNLIKELY(llc->llc.llc_dsap != LLC_DSAP_SNAP | |
379 | || llc->llc.llc_ssap != LLC_SSAP_SNAP | |
380 | || llc->llc.llc_cntl != LLC_CNTL_SNAP | |
381 | || memcmp(llc->snap.snap_org, SNAP_ORG_ETHERNET, | |
382 | sizeof llc->snap.snap_org))) { | |
383 | return htons(FLOW_DL_TYPE_NONE); | |
c6bcb685 | 384 | } |
c6bcb685 | 385 | |
419681da | 386 | data_pull(datap, sizep, sizeof *llc); |
685a51a5 | 387 | |
419681da JR |
388 | if (OVS_LIKELY(ntohs(llc->snap.snap_type) >= ETH_TYPE_MIN)) { |
389 | return llc->snap.snap_type; | |
685a51a5 JP |
390 | } |
391 | ||
419681da JR |
392 | return htons(FLOW_DL_TYPE_NONE); |
393 | } | |
685a51a5 | 394 | |
daf4d3c1 JR |
395 | /* Returns 'true' if the packet is an ND packet. In that case the '*nd_target' |
396 | * and 'arp_buf[]' are filled in. If the packet is not an ND pacet, 'false' is | |
397 | * returned and no values are filled in on '*nd_target' or 'arp_buf[]'. */ | |
398 | static inline bool | |
4c0e587c | 399 | parse_icmpv6(const void **datap, size_t *sizep, const struct icmp6_hdr *icmp, |
419681da | 400 | const struct in6_addr **nd_target, |
74ff3298 | 401 | struct eth_addr arp_buf[2]) |
419681da | 402 | { |
daf4d3c1 JR |
403 | if (icmp->icmp6_code != 0 || |
404 | (icmp->icmp6_type != ND_NEIGHBOR_SOLICIT && | |
405 | icmp->icmp6_type != ND_NEIGHBOR_ADVERT)) { | |
406 | return false; | |
407 | } | |
685a51a5 | 408 | |
daf4d3c1 JR |
409 | arp_buf[0] = eth_addr_zero; |
410 | arp_buf[1] = eth_addr_zero; | |
411 | *nd_target = data_try_pull(datap, sizep, sizeof **nd_target); | |
412 | if (OVS_UNLIKELY(!*nd_target)) { | |
413 | return true; | |
414 | } | |
685a51a5 | 415 | |
daf4d3c1 JR |
416 | while (*sizep >= 8) { |
417 | /* The minimum size of an option is 8 bytes, which also is | |
418 | * the size of Ethernet link-layer options. */ | |
86d46f3c ZKL |
419 | const struct ovs_nd_lla_opt *lla_opt = *datap; |
420 | int opt_len = lla_opt->len * ND_LLA_OPT_LEN; | |
88366484 | 421 | |
daf4d3c1 JR |
422 | if (!opt_len || opt_len > *sizep) { |
423 | return true; | |
424 | } | |
685a51a5 | 425 | |
daf4d3c1 JR |
426 | /* Store the link layer address if the appropriate option is |
427 | * provided. It is considered an error if the same link | |
428 | * layer option is specified twice. */ | |
86d46f3c | 429 | if (lla_opt->type == ND_OPT_SOURCE_LINKADDR && opt_len == 8) { |
daf4d3c1 | 430 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[0]))) { |
86d46f3c | 431 | arp_buf[0] = lla_opt->mac; |
daf4d3c1 JR |
432 | } else { |
433 | goto invalid; | |
685a51a5 | 434 | } |
86d46f3c | 435 | } else if (lla_opt->type == ND_OPT_TARGET_LINKADDR && opt_len == 8) { |
daf4d3c1 | 436 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[1]))) { |
86d46f3c | 437 | arp_buf[1] = lla_opt->mac; |
daf4d3c1 JR |
438 | } else { |
439 | goto invalid; | |
685a51a5 | 440 | } |
685a51a5 | 441 | } |
685a51a5 | 442 | |
daf4d3c1 JR |
443 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, opt_len))) { |
444 | return true; | |
445 | } | |
446 | } | |
447 | return true; | |
685a51a5 JP |
448 | |
449 | invalid: | |
cc5dba2f | 450 | *nd_target = NULL; |
74ff3298 JR |
451 | arp_buf[0] = eth_addr_zero; |
452 | arp_buf[1] = eth_addr_zero; | |
daf4d3c1 | 453 | return true; |
685a51a5 JP |
454 | } |
455 | ||
94a81e40 DDP |
456 | static inline bool |
457 | parse_ipv6_ext_hdrs__(const void **datap, size_t *sizep, uint8_t *nw_proto, | |
458 | uint8_t *nw_frag) | |
459 | { | |
460 | while (1) { | |
461 | if (OVS_LIKELY((*nw_proto != IPPROTO_HOPOPTS) | |
462 | && (*nw_proto != IPPROTO_ROUTING) | |
463 | && (*nw_proto != IPPROTO_DSTOPTS) | |
464 | && (*nw_proto != IPPROTO_AH) | |
465 | && (*nw_proto != IPPROTO_FRAGMENT))) { | |
466 | /* It's either a terminal header (e.g., TCP, UDP) or one we | |
467 | * don't understand. In either case, we're done with the | |
468 | * packet, so use it to fill in 'nw_proto'. */ | |
469 | return true; | |
470 | } | |
471 | ||
472 | /* We only verify that at least 8 bytes of the next header are | |
473 | * available, but many of these headers are longer. Ensure that | |
474 | * accesses within the extension header are within those first 8 | |
475 | * bytes. All extension headers are required to be at least 8 | |
476 | * bytes. */ | |
477 | if (OVS_UNLIKELY(*sizep < 8)) { | |
478 | return false; | |
479 | } | |
480 | ||
481 | if ((*nw_proto == IPPROTO_HOPOPTS) | |
482 | || (*nw_proto == IPPROTO_ROUTING) | |
483 | || (*nw_proto == IPPROTO_DSTOPTS)) { | |
484 | /* These headers, while different, have the fields we care | |
485 | * about in the same location and with the same | |
486 | * interpretation. */ | |
487 | const struct ip6_ext *ext_hdr = *datap; | |
488 | *nw_proto = ext_hdr->ip6e_nxt; | |
489 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, | |
490 | (ext_hdr->ip6e_len + 1) * 8))) { | |
491 | return false; | |
492 | } | |
493 | } else if (*nw_proto == IPPROTO_AH) { | |
494 | /* A standard AH definition isn't available, but the fields | |
495 | * we care about are in the same location as the generic | |
496 | * option header--only the header length is calculated | |
497 | * differently. */ | |
498 | const struct ip6_ext *ext_hdr = *datap; | |
499 | *nw_proto = ext_hdr->ip6e_nxt; | |
500 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, | |
501 | (ext_hdr->ip6e_len + 2) * 4))) { | |
502 | return false; | |
503 | } | |
504 | } else if (*nw_proto == IPPROTO_FRAGMENT) { | |
505 | const struct ovs_16aligned_ip6_frag *frag_hdr = *datap; | |
506 | ||
507 | *nw_proto = frag_hdr->ip6f_nxt; | |
508 | if (!data_try_pull(datap, sizep, sizeof *frag_hdr)) { | |
509 | return false; | |
510 | } | |
511 | ||
512 | /* We only process the first fragment. */ | |
513 | if (frag_hdr->ip6f_offlg != htons(0)) { | |
514 | *nw_frag = FLOW_NW_FRAG_ANY; | |
515 | if ((frag_hdr->ip6f_offlg & IP6F_OFF_MASK) != htons(0)) { | |
516 | *nw_frag |= FLOW_NW_FRAG_LATER; | |
517 | *nw_proto = IPPROTO_FRAGMENT; | |
518 | return true; | |
519 | } | |
520 | } | |
521 | } | |
522 | } | |
523 | } | |
524 | ||
525 | bool | |
526 | parse_ipv6_ext_hdrs(const void **datap, size_t *sizep, uint8_t *nw_proto, | |
527 | uint8_t *nw_frag) | |
528 | { | |
529 | return parse_ipv6_ext_hdrs__(datap, sizep, nw_proto, nw_frag); | |
530 | } | |
531 | ||
3d2fbd70 | 532 | bool |
17553f27 | 533 | parse_nsh(const void **datap, size_t *sizep, struct ovs_key_nsh *key) |
3d2fbd70 JS |
534 | { |
535 | const struct nsh_hdr *nsh = (const struct nsh_hdr *) *datap; | |
17553f27 | 536 | uint8_t version, length, flags, ttl; |
3d2fbd70 JS |
537 | |
538 | /* Check if it is long enough for NSH header, doesn't support | |
539 | * MD type 2 yet | |
540 | */ | |
7edef47b | 541 | if (OVS_UNLIKELY(*sizep < NSH_BASE_HDR_LEN)) { |
3d2fbd70 JS |
542 | return false; |
543 | } | |
544 | ||
f59cb331 YY |
545 | version = nsh_get_ver(nsh); |
546 | flags = nsh_get_flags(nsh); | |
547 | length = nsh_hdr_len(nsh); | |
17553f27 | 548 | ttl = nsh_get_ttl(nsh); |
3d2fbd70 | 549 | |
f59cb331 | 550 | if (OVS_UNLIKELY(length > *sizep || version != 0)) { |
3d2fbd70 JS |
551 | return false; |
552 | } | |
553 | ||
3d2fbd70 | 554 | key->flags = flags; |
17553f27 | 555 | key->ttl = ttl; |
3d2fbd70 JS |
556 | key->mdtype = nsh->md_type; |
557 | key->np = nsh->next_proto; | |
17553f27 | 558 | key->path_hdr = nsh_get_path_hdr(nsh); |
3d2fbd70 JS |
559 | |
560 | switch (key->mdtype) { | |
561 | case NSH_M_TYPE1: | |
7edef47b JS |
562 | if (length != NSH_M_TYPE1_LEN) { |
563 | return false; | |
564 | } | |
3d2fbd70 | 565 | for (size_t i = 0; i < 4; i++) { |
f59cb331 | 566 | key->context[i] = get_16aligned_be32(&nsh->md1.context[i]); |
3d2fbd70 JS |
567 | } |
568 | break; | |
569 | case NSH_M_TYPE2: | |
f59cb331 YY |
570 | /* Don't support MD type 2 metedata parsing yet */ |
571 | if (length < NSH_BASE_HDR_LEN) { | |
572 | return false; | |
573 | } | |
574 | ||
575 | memset(key->context, 0, sizeof(key->context)); | |
576 | break; | |
3d2fbd70 | 577 | default: |
7edef47b JS |
578 | /* We don't parse other context headers yet. */ |
579 | break; | |
3d2fbd70 JS |
580 | } |
581 | ||
582 | data_pull(datap, sizep, length); | |
583 | ||
584 | return true; | |
585 | } | |
586 | ||
2482b0b0 JS |
587 | /* Initializes 'flow' members from 'packet' and 'md', taking the packet type |
588 | * into account. | |
deedf7e7 | 589 | * |
2482b0b0 | 590 | * Initializes the layer offsets as follows: |
ca78c6b6 | 591 | * |
2482b0b0 JS |
592 | * - packet->l2_5_ofs to the |
593 | * * the start of the MPLS shim header. Can be zero, if the | |
594 | * packet is of type (OFPHTN_ETHERTYPE, ETH_TYPE_MPLS). | |
595 | * * UINT16_MAX when there is no MPLS shim header. | |
ca78c6b6 | 596 | * |
2482b0b0 JS |
597 | * - packet->l3_ofs is set to |
598 | * * zero if the packet_type is in name space OFPHTN_ETHERTYPE | |
599 | * and there is no MPLS shim header. | |
600 | * * just past the Ethernet header, or just past the vlan_header if | |
601 | * one is present, to the first byte of the payload of the | |
602 | * Ethernet frame if the packet type is Ethernet and there is | |
603 | * no MPLS shim header. | |
604 | * * just past the MPLS label stack to the first byte of the MPLS | |
605 | * payload if there is at least one MPLS shim header. | |
606 | * * UINT16_MAX if the packet type is Ethernet and the frame is | |
607 | * too short to contain an Ethernet header. | |
ca78c6b6 | 608 | * |
2482b0b0 JS |
609 | * - packet->l4_ofs is set to just past the IPv4 or IPv6 header, if one is |
610 | * present and the packet has at least the content used for the fields | |
611 | * of interest for the flow, otherwise UINT16_MAX. | |
ca78c6b6 | 612 | */ |
7257b535 | 613 | void |
cf62fa4c | 614 | flow_extract(struct dp_packet *packet, struct flow *flow) |
064af421 | 615 | { |
27bbe15d JR |
616 | struct { |
617 | struct miniflow mf; | |
d70e8c28 | 618 | uint64_t buf[FLOW_U64S]; |
27bbe15d | 619 | } m; |
064af421 BP |
620 | |
621 | COVERAGE_INC(flow_extract); | |
622 | ||
cf62fa4c | 623 | miniflow_extract(packet, &m.mf); |
27bbe15d | 624 | miniflow_expand(&m.mf, flow); |
419681da | 625 | } |
296e07ac | 626 | |
27bbe15d | 627 | /* Caller is responsible for initializing 'dst' with enough storage for |
d70e8c28 | 628 | * FLOW_U64S * 8 bytes. */ |
419681da | 629 | void |
cf62fa4c | 630 | miniflow_extract(struct dp_packet *packet, struct miniflow *dst) |
419681da | 631 | { |
cf62fa4c | 632 | const struct pkt_metadata *md = &packet->md; |
4c0e587c | 633 | const void *data = dp_packet_data(packet); |
cf62fa4c | 634 | size_t size = dp_packet_size(packet); |
2482b0b0 | 635 | ovs_be32 packet_type = packet->packet_type; |
09b0fa9c | 636 | uint64_t *values = miniflow_values(dst); |
5fcff47b JR |
637 | struct mf_ctx mf = { FLOWMAP_EMPTY_INITIALIZER, values, |
638 | values + FLOW_U64S }; | |
2482b0b0 JS |
639 | const char *frame; |
640 | ovs_be16 dl_type = OVS_BE16_MAX; | |
419681da | 641 | uint8_t nw_frag, nw_tos, nw_ttl, nw_proto; |
daf4d3c1 JR |
642 | uint8_t *ct_nw_proto_p = NULL; |
643 | ovs_be16 ct_tp_src = 0, ct_tp_dst = 0; | |
419681da JR |
644 | |
645 | /* Metadata. */ | |
ffe4c74f | 646 | if (flow_tnl_dst_is_set(&md->tunnel)) { |
cf62fa4c | 647 | miniflow_push_words(mf, tunnel, &md->tunnel, |
9ad11dbe JG |
648 | offsetof(struct flow_tnl, metadata) / |
649 | sizeof(uint64_t)); | |
6728d578 JG |
650 | |
651 | if (!(md->tunnel.flags & FLOW_TNL_F_UDPIF)) { | |
652 | if (md->tunnel.metadata.present.map) { | |
653 | miniflow_push_words(mf, tunnel.metadata, &md->tunnel.metadata, | |
654 | sizeof md->tunnel.metadata / | |
655 | sizeof(uint64_t)); | |
656 | } | |
657 | } else { | |
658 | if (md->tunnel.metadata.present.len) { | |
659 | miniflow_push_words(mf, tunnel.metadata.present, | |
660 | &md->tunnel.metadata.present, 1); | |
661 | miniflow_push_words(mf, tunnel.metadata.opts.gnv, | |
662 | md->tunnel.metadata.opts.gnv, | |
663 | DIV_ROUND_UP(md->tunnel.metadata.present.len, | |
664 | sizeof(uint64_t))); | |
665 | } | |
9ad11dbe | 666 | } |
cf62fa4c PS |
667 | } |
668 | if (md->skb_priority || md->pkt_mark) { | |
669 | miniflow_push_uint32(mf, skb_priority, md->skb_priority); | |
670 | miniflow_push_uint32(mf, pkt_mark, md->pkt_mark); | |
671 | } | |
672 | miniflow_push_uint32(mf, dp_hash, md->dp_hash); | |
673 | miniflow_push_uint32(mf, in_port, odp_to_u32(md->in_port.odp_port)); | |
6cf5c521 | 674 | if (md->ct_state) { |
cf62fa4c | 675 | miniflow_push_uint32(mf, recirc_id, md->recirc_id); |
2a28ccc8 | 676 | miniflow_push_uint8(mf, ct_state, md->ct_state); |
daf4d3c1 JR |
677 | ct_nw_proto_p = miniflow_pointer(mf, ct_nw_proto); |
678 | miniflow_push_uint8(mf, ct_nw_proto, 0); | |
07659514 | 679 | miniflow_push_uint16(mf, ct_zone, md->ct_zone); |
6cf5c521 DB |
680 | } else if (md->recirc_id) { |
681 | miniflow_push_uint32(mf, recirc_id, md->recirc_id); | |
682 | miniflow_pad_to_64(mf, recirc_id); | |
296e07ac | 683 | } |
064af421 | 684 | |
8e53fe8c JS |
685 | if (md->ct_state) { |
686 | miniflow_push_uint32(mf, ct_mark, md->ct_mark); | |
2482b0b0 | 687 | miniflow_push_be32(mf, packet_type, packet_type); |
9daf2348 | 688 | |
2ff8484b | 689 | if (!ovs_u128_is_zero(md->ct_label)) { |
9daf2348 JS |
690 | miniflow_push_words(mf, ct_label, &md->ct_label, |
691 | sizeof md->ct_label / sizeof(uint64_t)); | |
692 | } | |
2482b0b0 JS |
693 | } else { |
694 | miniflow_pad_from_64(mf, packet_type); | |
695 | miniflow_push_be32(mf, packet_type, packet_type); | |
8e53fe8c JS |
696 | } |
697 | ||
419681da | 698 | /* Initialize packet's layer pointer and offsets. */ |
2482b0b0 | 699 | frame = data; |
82eb5b0a | 700 | dp_packet_reset_offsets(packet); |
064af421 | 701 | |
2482b0b0 JS |
702 | if (packet_type == htonl(PT_ETH)) { |
703 | /* Must have full Ethernet header to proceed. */ | |
704 | if (OVS_UNLIKELY(size < sizeof(struct eth_header))) { | |
705 | goto out; | |
706 | } else { | |
707 | /* Link layer. */ | |
708 | ASSERT_SEQUENTIAL(dl_dst, dl_src); | |
709 | miniflow_push_macs(mf, dl_dst, data); | |
710 | ||
711 | /* VLAN */ | |
712 | union flow_vlan_hdr vlans[FLOW_MAX_VLAN_HEADERS]; | |
713 | size_t num_vlans = parse_vlan(&data, &size, vlans); | |
714 | ||
715 | dl_type = parse_ethertype(&data, &size); | |
716 | miniflow_push_be16(mf, dl_type, dl_type); | |
717 | miniflow_pad_to_64(mf, dl_type); | |
718 | if (num_vlans > 0) { | |
719 | miniflow_push_words_32(mf, vlans, vlans, num_vlans); | |
720 | } | |
f0fb825a | 721 | |
2482b0b0 JS |
722 | } |
723 | } else { | |
724 | /* Take dl_type from packet_type. */ | |
725 | dl_type = pt_ns_type_be(packet_type); | |
726 | miniflow_pad_from_64(mf, dl_type); | |
419681da | 727 | miniflow_push_be16(mf, dl_type, dl_type); |
2482b0b0 | 728 | /* Do not push vlan_tci, pad instead */ |
f0fb825a | 729 | miniflow_pad_to_64(mf, dl_type); |
50f06e16 | 730 | } |
50f06e16 | 731 | |
419681da JR |
732 | /* Parse mpls. */ |
733 | if (OVS_UNLIKELY(eth_type_mpls(dl_type))) { | |
734 | int count; | |
735 | const void *mpls = data; | |
736 | ||
2482b0b0 | 737 | packet->l2_5_ofs = (char *)data - frame; |
419681da | 738 | count = parse_mpls(&data, &size); |
d70e8c28 | 739 | miniflow_push_words_32(mf, mpls_lse, mpls, count); |
b02475c5 SH |
740 | } |
741 | ||
ad128cc1 | 742 | /* Network layer. */ |
2482b0b0 | 743 | packet->l3_ofs = (char *)data - frame; |
419681da JR |
744 | |
745 | nw_frag = 0; | |
746 | if (OVS_LIKELY(dl_type == htons(ETH_TYPE_IP))) { | |
747 | const struct ip_header *nh = data; | |
748 | int ip_len; | |
fa8d9001 | 749 | uint16_t tot_len; |
419681da JR |
750 | |
751 | if (OVS_UNLIKELY(size < IP_HEADER_LEN)) { | |
752 | goto out; | |
753 | } | |
754 | ip_len = IP_IHL(nh->ip_ihl_ver) * 4; | |
755 | ||
756 | if (OVS_UNLIKELY(ip_len < IP_HEADER_LEN)) { | |
757 | goto out; | |
758 | } | |
fa8d9001 JR |
759 | if (OVS_UNLIKELY(size < ip_len)) { |
760 | goto out; | |
761 | } | |
762 | tot_len = ntohs(nh->ip_tot_len); | |
5b2cdc3f | 763 | if (OVS_UNLIKELY(tot_len > size || ip_len > tot_len)) { |
fa8d9001 JR |
764 | goto out; |
765 | } | |
766 | if (OVS_UNLIKELY(size - tot_len > UINT8_MAX)) { | |
767 | goto out; | |
768 | } | |
cf62fa4c | 769 | dp_packet_set_l2_pad_size(packet, size - tot_len); |
fa8d9001 | 770 | size = tot_len; /* Never pull padding. */ |
419681da JR |
771 | |
772 | /* Push both source and destination address at once. */ | |
d70e8c28 | 773 | miniflow_push_words(mf, nw_src, &nh->ip_src, 1); |
daf4d3c1 JR |
774 | if (ct_nw_proto_p && !md->ct_orig_tuple_ipv6) { |
775 | *ct_nw_proto_p = md->ct_orig_tuple.ipv4.ipv4_proto; | |
776 | if (*ct_nw_proto_p) { | |
777 | miniflow_push_words(mf, ct_nw_src, | |
778 | &md->ct_orig_tuple.ipv4.ipv4_src, 1); | |
779 | ct_tp_src = md->ct_orig_tuple.ipv4.src_port; | |
780 | ct_tp_dst = md->ct_orig_tuple.ipv4.dst_port; | |
781 | } | |
782 | } | |
d70e8c28 JR |
783 | |
784 | miniflow_push_be32(mf, ipv6_label, 0); /* Padding for IPv4. */ | |
419681da JR |
785 | |
786 | nw_tos = nh->ip_tos; | |
787 | nw_ttl = nh->ip_ttl; | |
788 | nw_proto = nh->ip_proto; | |
789 | if (OVS_UNLIKELY(IP_IS_FRAGMENT(nh->ip_frag_off))) { | |
790 | nw_frag = FLOW_NW_FRAG_ANY; | |
791 | if (nh->ip_frag_off & htons(IP_FRAG_OFF_MASK)) { | |
792 | nw_frag |= FLOW_NW_FRAG_LATER; | |
793 | } | |
794 | } | |
419681da | 795 | data_pull(&data, &size, ip_len); |
419681da JR |
796 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { |
797 | const struct ovs_16aligned_ip6_hdr *nh; | |
798 | ovs_be32 tc_flow; | |
fa8d9001 | 799 | uint16_t plen; |
419681da JR |
800 | |
801 | if (OVS_UNLIKELY(size < sizeof *nh)) { | |
802 | goto out; | |
803 | } | |
804 | nh = data_pull(&data, &size, sizeof *nh); | |
805 | ||
fa8d9001 JR |
806 | plen = ntohs(nh->ip6_plen); |
807 | if (OVS_UNLIKELY(plen > size)) { | |
808 | goto out; | |
809 | } | |
810 | /* Jumbo Payload option not supported yet. */ | |
811 | if (OVS_UNLIKELY(size - plen > UINT8_MAX)) { | |
812 | goto out; | |
813 | } | |
cf62fa4c | 814 | dp_packet_set_l2_pad_size(packet, size - plen); |
fa8d9001 JR |
815 | size = plen; /* Never pull padding. */ |
816 | ||
419681da | 817 | miniflow_push_words(mf, ipv6_src, &nh->ip6_src, |
d70e8c28 | 818 | sizeof nh->ip6_src / 8); |
419681da | 819 | miniflow_push_words(mf, ipv6_dst, &nh->ip6_dst, |
d70e8c28 | 820 | sizeof nh->ip6_dst / 8); |
daf4d3c1 JR |
821 | if (ct_nw_proto_p && md->ct_orig_tuple_ipv6) { |
822 | *ct_nw_proto_p = md->ct_orig_tuple.ipv6.ipv6_proto; | |
823 | if (*ct_nw_proto_p) { | |
824 | miniflow_push_words(mf, ct_ipv6_src, | |
825 | &md->ct_orig_tuple.ipv6.ipv6_src, | |
826 | 2 * | |
827 | sizeof md->ct_orig_tuple.ipv6.ipv6_src / 8); | |
828 | ct_tp_src = md->ct_orig_tuple.ipv6.src_port; | |
829 | ct_tp_dst = md->ct_orig_tuple.ipv6.dst_port; | |
830 | } | |
831 | } | |
419681da JR |
832 | |
833 | tc_flow = get_16aligned_be32(&nh->ip6_flow); | |
834 | { | |
835 | ovs_be32 label = tc_flow & htonl(IPV6_LABEL_MASK); | |
d70e8c28 | 836 | miniflow_push_be32(mf, ipv6_label, label); |
419681da JR |
837 | } |
838 | ||
839 | nw_tos = ntohl(tc_flow) >> 20; | |
840 | nw_ttl = nh->ip6_hlim; | |
841 | nw_proto = nh->ip6_nxt; | |
842 | ||
94a81e40 DDP |
843 | if (!parse_ipv6_ext_hdrs__(&data, &size, &nw_proto, &nw_frag)) { |
844 | goto out; | |
50f06e16 | 845 | } |
419681da JR |
846 | } else { |
847 | if (dl_type == htons(ETH_TYPE_ARP) || | |
848 | dl_type == htons(ETH_TYPE_RARP)) { | |
74ff3298 | 849 | struct eth_addr arp_buf[2]; |
419681da JR |
850 | const struct arp_eth_header *arp = (const struct arp_eth_header *) |
851 | data_try_pull(&data, &size, ARP_ETH_HEADER_LEN); | |
852 | ||
853 | if (OVS_LIKELY(arp) && OVS_LIKELY(arp->ar_hrd == htons(1)) | |
854 | && OVS_LIKELY(arp->ar_pro == htons(ETH_TYPE_IP)) | |
855 | && OVS_LIKELY(arp->ar_hln == ETH_ADDR_LEN) | |
856 | && OVS_LIKELY(arp->ar_pln == 4)) { | |
d70e8c28 JR |
857 | miniflow_push_be32(mf, nw_src, |
858 | get_16aligned_be32(&arp->ar_spa)); | |
859 | miniflow_push_be32(mf, nw_dst, | |
860 | get_16aligned_be32(&arp->ar_tpa)); | |
419681da JR |
861 | |
862 | /* We only match on the lower 8 bits of the opcode. */ | |
863 | if (OVS_LIKELY(ntohs(arp->ar_op) <= 0xff)) { | |
d70e8c28 | 864 | miniflow_push_be32(mf, ipv6_label, 0); /* Pad with ARP. */ |
419681da JR |
865 | miniflow_push_be32(mf, nw_frag, htonl(ntohs(arp->ar_op))); |
866 | } | |
d31f1109 | 867 | |
419681da | 868 | /* Must be adjacent. */ |
268eca11 | 869 | ASSERT_SEQUENTIAL(arp_sha, arp_tha); |
419681da | 870 | |
74ff3298 JR |
871 | arp_buf[0] = arp->ar_sha; |
872 | arp_buf[1] = arp->ar_tha; | |
d70e8c28 | 873 | miniflow_push_macs(mf, arp_sha, arp_buf); |
06f41fc4 | 874 | miniflow_pad_to_64(mf, arp_tha); |
419681da | 875 | } |
3d2fbd70 | 876 | } else if (dl_type == htons(ETH_TYPE_NSH)) { |
17553f27 | 877 | struct ovs_key_nsh nsh; |
3d2fbd70 JS |
878 | |
879 | if (OVS_LIKELY(parse_nsh(&data, &size, &nsh))) { | |
f59cb331 | 880 | miniflow_push_words(mf, nsh, &nsh, |
17553f27 | 881 | sizeof(struct ovs_key_nsh) / |
f59cb331 | 882 | sizeof(uint64_t)); |
3d2fbd70 | 883 | } |
d31f1109 | 884 | } |
419681da JR |
885 | goto out; |
886 | } | |
887 | ||
2482b0b0 | 888 | packet->l4_ofs = (char *)data - frame; |
419681da | 889 | miniflow_push_be32(mf, nw_frag, |
a13784ba | 890 | bytes_to_be32(nw_frag, nw_tos, nw_ttl, nw_proto)); |
419681da JR |
891 | |
892 | if (OVS_LIKELY(!(nw_frag & FLOW_NW_FRAG_LATER))) { | |
893 | if (OVS_LIKELY(nw_proto == IPPROTO_TCP)) { | |
894 | if (OVS_LIKELY(size >= TCP_HEADER_LEN)) { | |
895 | const struct tcp_header *tcp = data; | |
896 | ||
74ff3298 | 897 | miniflow_push_be32(mf, arp_tha.ea[2], 0); |
419681da JR |
898 | miniflow_push_be32(mf, tcp_flags, |
899 | TCP_FLAGS_BE32(tcp->tcp_ctl)); | |
115f2481 JR |
900 | miniflow_push_be16(mf, tp_src, tcp->tcp_src); |
901 | miniflow_push_be16(mf, tp_dst, tcp->tcp_dst); | |
daf4d3c1 JR |
902 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
903 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da JR |
904 | } |
905 | } else if (OVS_LIKELY(nw_proto == IPPROTO_UDP)) { | |
906 | if (OVS_LIKELY(size >= UDP_HEADER_LEN)) { | |
907 | const struct udp_header *udp = data; | |
908 | ||
115f2481 JR |
909 | miniflow_push_be16(mf, tp_src, udp->udp_src); |
910 | miniflow_push_be16(mf, tp_dst, udp->udp_dst); | |
daf4d3c1 JR |
911 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
912 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
064af421 | 913 | } |
419681da JR |
914 | } else if (OVS_LIKELY(nw_proto == IPPROTO_SCTP)) { |
915 | if (OVS_LIKELY(size >= SCTP_HEADER_LEN)) { | |
916 | const struct sctp_header *sctp = data; | |
a26ef517 | 917 | |
115f2481 JR |
918 | miniflow_push_be16(mf, tp_src, sctp->sctp_src); |
919 | miniflow_push_be16(mf, tp_dst, sctp->sctp_dst); | |
daf4d3c1 JR |
920 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
921 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da JR |
922 | } |
923 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMP)) { | |
924 | if (OVS_LIKELY(size >= ICMP_HEADER_LEN)) { | |
925 | const struct icmp_header *icmp = data; | |
926 | ||
927 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp_type)); | |
928 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp_code)); | |
daf4d3c1 JR |
929 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
930 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da | 931 | } |
0e612675 FL |
932 | } else if (OVS_LIKELY(nw_proto == IPPROTO_IGMP)) { |
933 | if (OVS_LIKELY(size >= IGMP_HEADER_LEN)) { | |
934 | const struct igmp_header *igmp = data; | |
935 | ||
936 | miniflow_push_be16(mf, tp_src, htons(igmp->igmp_type)); | |
937 | miniflow_push_be16(mf, tp_dst, htons(igmp->igmp_code)); | |
daf4d3c1 JR |
938 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
939 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
0e612675 FL |
940 | miniflow_push_be32(mf, igmp_group_ip4, |
941 | get_16aligned_be32(&igmp->group)); | |
daf4d3c1 | 942 | miniflow_pad_to_64(mf, igmp_group_ip4); |
0e612675 | 943 | } |
419681da JR |
944 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMPV6)) { |
945 | if (OVS_LIKELY(size >= sizeof(struct icmp6_hdr))) { | |
daf4d3c1 JR |
946 | const struct in6_addr *nd_target; |
947 | struct eth_addr arp_buf[2]; | |
419681da JR |
948 | const struct icmp6_hdr *icmp = data_pull(&data, &size, |
949 | sizeof *icmp); | |
daf4d3c1 JR |
950 | if (parse_icmpv6(&data, &size, icmp, &nd_target, arp_buf)) { |
951 | if (nd_target) { | |
952 | miniflow_push_words(mf, nd_target, nd_target, | |
953 | sizeof *nd_target / sizeof(uint64_t)); | |
954 | } | |
955 | miniflow_push_macs(mf, arp_sha, arp_buf); | |
956 | miniflow_pad_to_64(mf, arp_tha); | |
957 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp6_type)); | |
958 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp6_code)); | |
959 | miniflow_pad_to_64(mf, tp_dst); | |
960 | } else { | |
961 | /* ICMPv6 but not ND. */ | |
962 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp6_type)); | |
963 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp6_code)); | |
964 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); | |
965 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da JR |
966 | } |
967 | } | |
064af421 BP |
968 | } |
969 | } | |
419681da | 970 | out: |
5fcff47b | 971 | dst->map = mf.map; |
064af421 BP |
972 | } |
973 | ||
206b60d4 DDP |
974 | ovs_be16 |
975 | parse_dl_type(const struct eth_header *data_, size_t size) | |
976 | { | |
977 | const void *data = data_; | |
f0fb825a | 978 | union flow_vlan_hdr vlans[FLOW_MAX_VLAN_HEADERS]; |
206b60d4 | 979 | |
f0fb825a | 980 | parse_vlan(&data, &size, vlans); |
206b60d4 DDP |
981 | |
982 | return parse_ethertype(&data, &size); | |
983 | } | |
984 | ||
993410fb BP |
985 | /* For every bit of a field that is wildcarded in 'wildcards', sets the |
986 | * corresponding bit in 'flow' to zero. */ | |
987 | void | |
988 | flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards) | |
989 | { | |
d70e8c28 JR |
990 | uint64_t *flow_u64 = (uint64_t *) flow; |
991 | const uint64_t *wc_u64 = (const uint64_t *) &wildcards->masks; | |
659c2346 | 992 | size_t i; |
993410fb | 993 | |
d70e8c28 JR |
994 | for (i = 0; i < FLOW_U64S; i++) { |
995 | flow_u64[i] &= wc_u64[i]; | |
26720e24 | 996 | } |
993410fb BP |
997 | } |
998 | ||
d8d9c698 EJ |
999 | void |
1000 | flow_unwildcard_tp_ports(const struct flow *flow, struct flow_wildcards *wc) | |
1001 | { | |
1002 | if (flow->nw_proto != IPPROTO_ICMP) { | |
1003 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
1004 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
1005 | } else { | |
1006 | wc->masks.tp_src = htons(0xff); | |
1007 | wc->masks.tp_dst = htons(0xff); | |
1008 | } | |
1009 | } | |
1010 | ||
50dcbd8e | 1011 | /* Initializes 'flow_metadata' with the metadata found in 'flow'. */ |
5d6c3af0 | 1012 | void |
50dcbd8e | 1013 | flow_get_metadata(const struct flow *flow, struct match *flow_metadata) |
5d6c3af0 | 1014 | { |
50dcbd8e JG |
1015 | int i; |
1016 | ||
3d2fbd70 | 1017 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 40); |
e9358af6 | 1018 | |
50dcbd8e JG |
1019 | match_init_catchall(flow_metadata); |
1020 | if (flow->tunnel.tun_id != htonll(0)) { | |
1021 | match_set_tun_id(flow_metadata, flow->tunnel.tun_id); | |
1022 | } | |
b666962b JG |
1023 | if (flow->tunnel.flags & FLOW_TNL_PUB_F_MASK) { |
1024 | match_set_tun_flags(flow_metadata, | |
1025 | flow->tunnel.flags & FLOW_TNL_PUB_F_MASK); | |
1026 | } | |
ffe4c74f | 1027 | if (flow->tunnel.ip_src) { |
50dcbd8e JG |
1028 | match_set_tun_src(flow_metadata, flow->tunnel.ip_src); |
1029 | } | |
ffe4c74f | 1030 | if (flow->tunnel.ip_dst) { |
50dcbd8e JG |
1031 | match_set_tun_dst(flow_metadata, flow->tunnel.ip_dst); |
1032 | } | |
ffe4c74f JB |
1033 | if (ipv6_addr_is_set(&flow->tunnel.ipv6_src)) { |
1034 | match_set_tun_ipv6_src(flow_metadata, &flow->tunnel.ipv6_src); | |
1035 | } | |
1036 | if (ipv6_addr_is_set(&flow->tunnel.ipv6_dst)) { | |
1037 | match_set_tun_ipv6_dst(flow_metadata, &flow->tunnel.ipv6_dst); | |
1038 | } | |
50dcbd8e JG |
1039 | if (flow->tunnel.gbp_id != htons(0)) { |
1040 | match_set_tun_gbp_id(flow_metadata, flow->tunnel.gbp_id); | |
1041 | } | |
1042 | if (flow->tunnel.gbp_flags) { | |
1043 | match_set_tun_gbp_flags(flow_metadata, flow->tunnel.gbp_flags); | |
1044 | } | |
6728d578 | 1045 | tun_metadata_get_fmd(&flow->tunnel, flow_metadata); |
50dcbd8e JG |
1046 | if (flow->metadata != htonll(0)) { |
1047 | match_set_metadata(flow_metadata, flow->metadata); | |
1048 | } | |
1049 | ||
1050 | for (i = 0; i < FLOW_N_REGS; i++) { | |
1051 | if (flow->regs[i]) { | |
1052 | match_set_reg(flow_metadata, i, flow->regs[i]); | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | if (flow->pkt_mark != 0) { | |
1057 | match_set_pkt_mark(flow_metadata, flow->pkt_mark); | |
1058 | } | |
1059 | ||
1060 | match_set_in_port(flow_metadata, flow->in_port.ofp_port); | |
6a81043e JS |
1061 | if (flow->packet_type != htonl(PT_ETH)) { |
1062 | match_set_packet_type(flow_metadata, flow->packet_type); | |
1063 | } | |
1064 | ||
07659514 JS |
1065 | if (flow->ct_state != 0) { |
1066 | match_set_ct_state(flow_metadata, flow->ct_state); | |
7827edca DA |
1067 | /* Match dl_type since it is required for the later interpretation of |
1068 | * the conntrack metadata. */ | |
1069 | match_set_dl_type(flow_metadata, flow->dl_type); | |
daf4d3c1 JR |
1070 | if (is_ct_valid(flow, NULL, NULL) && flow->ct_nw_proto != 0) { |
1071 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1072 | match_set_ct_nw_src(flow_metadata, flow->ct_nw_src); | |
1073 | match_set_ct_nw_dst(flow_metadata, flow->ct_nw_dst); | |
1074 | match_set_ct_nw_proto(flow_metadata, flow->ct_nw_proto); | |
1075 | match_set_ct_tp_src(flow_metadata, flow->ct_tp_src); | |
1076 | match_set_ct_tp_dst(flow_metadata, flow->ct_tp_dst); | |
1077 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1078 | match_set_ct_ipv6_src(flow_metadata, &flow->ct_ipv6_src); | |
1079 | match_set_ct_ipv6_dst(flow_metadata, &flow->ct_ipv6_dst); | |
1080 | match_set_ct_nw_proto(flow_metadata, flow->ct_nw_proto); | |
1081 | match_set_ct_tp_src(flow_metadata, flow->ct_tp_src); | |
1082 | match_set_ct_tp_dst(flow_metadata, flow->ct_tp_dst); | |
1083 | } | |
1084 | } | |
07659514 JS |
1085 | } |
1086 | if (flow->ct_zone != 0) { | |
1087 | match_set_ct_zone(flow_metadata, flow->ct_zone); | |
1088 | } | |
8e53fe8c JS |
1089 | if (flow->ct_mark != 0) { |
1090 | match_set_ct_mark(flow_metadata, flow->ct_mark); | |
1091 | } | |
2ff8484b | 1092 | if (!ovs_u128_is_zero(flow->ct_label)) { |
9daf2348 JS |
1093 | match_set_ct_label(flow_metadata, flow->ct_label); |
1094 | } | |
07659514 JS |
1095 | } |
1096 | ||
b02e6cf8 BP |
1097 | const char * |
1098 | ct_state_to_string(uint32_t state) | |
07659514 JS |
1099 | { |
1100 | switch (state) { | |
fd6cd1bf BP |
1101 | #define CS_STATE(ENUM, INDEX, NAME) case CS_##ENUM: return NAME; |
1102 | CS_STATES | |
1103 | #undef CS_STATE | |
07659514 JS |
1104 | default: |
1105 | return NULL; | |
1106 | } | |
5d6c3af0 EJ |
1107 | } |
1108 | ||
b02e6cf8 BP |
1109 | uint32_t |
1110 | ct_state_from_string(const char *s) | |
1111 | { | |
1112 | #define CS_STATE(ENUM, INDEX, NAME) \ | |
1113 | if (!strcmp(s, NAME)) { \ | |
1114 | return CS_##ENUM; \ | |
1115 | } | |
1116 | CS_STATES | |
1117 | #undef CS_STATE | |
1118 | return 0; | |
1119 | } | |
1120 | ||
b4293a33 YHW |
1121 | /* Parses conntrack state from 'state_str'. If it is parsed successfully, |
1122 | * stores the parsed ct_state in 'ct_state', and returns true. Otherwise, | |
1123 | * returns false, and reports error message in 'ds'. */ | |
1124 | bool | |
1125 | parse_ct_state(const char *state_str, uint32_t default_state, | |
1126 | uint32_t *ct_state, struct ds *ds) | |
1127 | { | |
1128 | uint32_t state = default_state; | |
1129 | char *state_s = xstrdup(state_str); | |
1130 | char *save_ptr = NULL; | |
1131 | ||
1132 | for (char *cs = strtok_r(state_s, ", ", &save_ptr); cs; | |
1133 | cs = strtok_r(NULL, ", ", &save_ptr)) { | |
1134 | uint32_t bit = ct_state_from_string(cs); | |
1135 | if (!bit) { | |
1136 | ds_put_format(ds, "%s: unknown connection tracking state flag", | |
1137 | cs); | |
1138 | return false; | |
1139 | } | |
1140 | state |= bit; | |
1141 | } | |
1142 | ||
1143 | *ct_state = state; | |
1144 | free(state_s); | |
1145 | ||
1146 | return true; | |
1147 | } | |
1148 | ||
1149 | /* Checks the given conntrack state 'state' according to the constraints | |
1150 | * listed in ovs-fields (7). Returns true if it is valid. Otherwise, returns | |
1151 | * false, and reports error in 'ds'. */ | |
1152 | bool | |
1153 | validate_ct_state(uint32_t state, struct ds *ds) | |
1154 | { | |
1155 | bool valid_ct_state = true; | |
1156 | struct ds d_str = DS_EMPTY_INITIALIZER; | |
1157 | ||
1158 | format_flags(&d_str, ct_state_to_string, state, '|'); | |
1159 | ||
1160 | if (state && !(state & CS_TRACKED)) { | |
1161 | ds_put_format(ds, "%s: invalid connection state: " | |
1162 | "If \"trk\" is unset, no other flags are set\n", | |
1163 | ds_cstr(&d_str)); | |
1164 | valid_ct_state = false; | |
1165 | } | |
1166 | if (state & CS_INVALID && state & ~(CS_TRACKED | CS_INVALID)) { | |
1167 | ds_put_format(ds, "%s: invalid connection state: " | |
1168 | "when \"inv\" is set, only \"trk\" may also be set\n", | |
1169 | ds_cstr(&d_str)); | |
1170 | valid_ct_state = false; | |
1171 | } | |
1172 | if (state & CS_NEW && state & CS_ESTABLISHED) { | |
1173 | ds_put_format(ds, "%s: invalid connection state: " | |
1174 | "\"new\" and \"est\" are mutually exclusive\n", | |
1175 | ds_cstr(&d_str)); | |
1176 | valid_ct_state = false; | |
1177 | } | |
1178 | if (state & CS_NEW && state & CS_REPLY_DIR) { | |
1179 | ds_put_format(ds, "%s: invalid connection state: " | |
1180 | "\"new\" and \"rpy\" are mutually exclusive\n", | |
1181 | ds_cstr(&d_str)); | |
1182 | valid_ct_state = false; | |
1183 | } | |
1184 | ||
1185 | ds_destroy(&d_str); | |
1186 | return valid_ct_state; | |
1187 | } | |
1188 | ||
6846e91e BP |
1189 | /* Clears the fields in 'flow' associated with connection tracking. */ |
1190 | void | |
1191 | flow_clear_conntrack(struct flow *flow) | |
1192 | { | |
1193 | flow->ct_state = 0; | |
1194 | flow->ct_zone = 0; | |
1195 | flow->ct_mark = 0; | |
1196 | flow->ct_label = OVS_U128_ZERO; | |
1197 | ||
1198 | flow->ct_nw_proto = 0; | |
1199 | flow->ct_tp_src = 0; | |
1200 | flow->ct_tp_dst = 0; | |
1201 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1202 | flow->ct_nw_src = 0; | |
1203 | flow->ct_nw_dst = 0; | |
1204 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1205 | memset(&flow->ct_ipv6_src, 0, sizeof flow->ct_ipv6_src); | |
1206 | memset(&flow->ct_ipv6_dst, 0, sizeof flow->ct_ipv6_dst); | |
1207 | } | |
1208 | } | |
1209 | ||
064af421 | 1210 | char * |
50f96b10 BP |
1211 | flow_to_string(const struct flow *flow, |
1212 | const struct ofputil_port_map *port_map) | |
064af421 BP |
1213 | { |
1214 | struct ds ds = DS_EMPTY_INITIALIZER; | |
50f96b10 | 1215 | flow_format(&ds, flow, port_map); |
064af421 BP |
1216 | return ds_cstr(&ds); |
1217 | } | |
1218 | ||
4fe3445a PS |
1219 | const char * |
1220 | flow_tun_flag_to_string(uint32_t flags) | |
1221 | { | |
1222 | switch (flags) { | |
1223 | case FLOW_TNL_F_DONT_FRAGMENT: | |
1224 | return "df"; | |
1225 | case FLOW_TNL_F_CSUM: | |
1226 | return "csum"; | |
1227 | case FLOW_TNL_F_KEY: | |
1228 | return "key"; | |
94872594 JG |
1229 | case FLOW_TNL_F_OAM: |
1230 | return "oam"; | |
4fe3445a PS |
1231 | default: |
1232 | return NULL; | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | void | |
1237 | format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t), | |
1238 | uint32_t flags, char del) | |
1239 | { | |
1240 | uint32_t bad = 0; | |
1241 | ||
1242 | if (!flags) { | |
8e4c1621 | 1243 | ds_put_char(ds, '0'); |
4fe3445a PS |
1244 | return; |
1245 | } | |
1246 | while (flags) { | |
1247 | uint32_t bit = rightmost_1bit(flags); | |
1248 | const char *s; | |
1249 | ||
1250 | s = bit_to_string(bit); | |
1251 | if (s) { | |
1252 | ds_put_format(ds, "%s%c", s, del); | |
1253 | } else { | |
1254 | bad |= bit; | |
1255 | } | |
1256 | ||
1257 | flags &= ~bit; | |
1258 | } | |
1259 | ||
1260 | if (bad) { | |
1261 | ds_put_format(ds, "0x%"PRIx32"%c", bad, del); | |
1262 | } | |
1263 | ds_chomp(ds, del); | |
1264 | } | |
1265 | ||
61bf6666 JR |
1266 | void |
1267 | format_flags_masked(struct ds *ds, const char *name, | |
1268 | const char *(*bit_to_string)(uint32_t), uint32_t flags, | |
8e4c1621 | 1269 | uint32_t mask, uint32_t max_mask) |
61bf6666 JR |
1270 | { |
1271 | if (name) { | |
0deec6d2 | 1272 | ds_put_format(ds, "%s%s=%s", colors.param, name, colors.end); |
61bf6666 | 1273 | } |
8e4c1621 JG |
1274 | |
1275 | if (mask == max_mask) { | |
1276 | format_flags(ds, bit_to_string, flags, '|'); | |
1277 | return; | |
1278 | } | |
1279 | ||
1280 | if (!mask) { | |
1281 | ds_put_cstr(ds, "0/0"); | |
1282 | return; | |
1283 | } | |
1284 | ||
61bf6666 JR |
1285 | while (mask) { |
1286 | uint32_t bit = rightmost_1bit(mask); | |
1287 | const char *s = bit_to_string(bit); | |
1288 | ||
1289 | ds_put_format(ds, "%s%s", (flags & bit) ? "+" : "-", | |
1290 | s ? s : "[Unknown]"); | |
1291 | mask &= ~bit; | |
1292 | } | |
1293 | } | |
1294 | ||
3d4b2e6e JS |
1295 | static void |
1296 | put_u16_masked(struct ds *s, uint16_t value, uint16_t mask) | |
1297 | { | |
1298 | if (!mask) { | |
1299 | ds_put_char(s, '*'); | |
1300 | } else { | |
1301 | if (value > 9) { | |
1302 | ds_put_format(s, "0x%"PRIx16, value); | |
1303 | } else { | |
1304 | ds_put_format(s, "%"PRIu16, value); | |
1305 | } | |
1306 | ||
1307 | if (mask != UINT16_MAX) { | |
1308 | ds_put_format(s, "/0x%"PRIx16, mask); | |
1309 | } | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | void | |
1314 | format_packet_type_masked(struct ds *s, ovs_be32 value, ovs_be32 mask) | |
1315 | { | |
1316 | if (value == htonl(PT_ETH) && mask == OVS_BE32_MAX) { | |
1317 | ds_put_cstr(s, "eth"); | |
1318 | } else { | |
1319 | ds_put_cstr(s, "packet_type=("); | |
1320 | put_u16_masked(s, pt_ns(value), pt_ns(mask)); | |
1321 | ds_put_char(s, ','); | |
1322 | put_u16_masked(s, pt_ns_type(value), pt_ns_type(mask)); | |
1323 | ds_put_char(s, ')'); | |
1324 | } | |
1325 | } | |
1326 | ||
8e4c1621 JG |
1327 | /* Scans a string 's' of flags to determine their numerical value and |
1328 | * returns the number of characters parsed using 'bit_to_string' to | |
1329 | * lookup flag names. Scanning continues until the character 'end' is | |
1330 | * reached. | |
1331 | * | |
1332 | * In the event of a failure, a negative error code will be returned. In | |
1333 | * addition, if 'res_string' is non-NULL then a descriptive string will | |
1334 | * be returned incorporating the identifying string 'field_name'. This | |
1335 | * error string must be freed by the caller. | |
1336 | * | |
1337 | * Upon success, the flag values will be stored in 'res_flags' and | |
1338 | * optionally 'res_mask', if it is non-NULL (if it is NULL then any masks | |
1339 | * present in the original string will be considered an error). The | |
1340 | * caller may restrict the acceptable set of values through the mask | |
1341 | * 'allowed'. */ | |
1342 | int | |
1343 | parse_flags(const char *s, const char *(*bit_to_string)(uint32_t), | |
1344 | char end, const char *field_name, char **res_string, | |
1345 | uint32_t *res_flags, uint32_t allowed, uint32_t *res_mask) | |
1346 | { | |
1347 | uint32_t result = 0; | |
1348 | int n; | |
1349 | ||
1350 | /* Parse masked flags in numeric format? */ | |
1351 | if (res_mask && ovs_scan(s, "%"SCNi32"/%"SCNi32"%n", | |
1352 | res_flags, res_mask, &n) && n > 0) { | |
1353 | if (*res_flags & ~allowed || *res_mask & ~allowed) { | |
1354 | goto unknown; | |
1355 | } | |
1356 | return n; | |
1357 | } | |
1358 | ||
1359 | n = 0; | |
1360 | ||
1361 | if (res_mask && (*s == '+' || *s == '-')) { | |
1362 | uint32_t flags = 0, mask = 0; | |
1363 | ||
1364 | /* Parse masked flags. */ | |
1365 | while (s[0] != end) { | |
1366 | bool set; | |
1367 | uint32_t bit; | |
1368 | size_t len; | |
1369 | ||
1370 | if (s[0] == '+') { | |
1371 | set = true; | |
1372 | } else if (s[0] == '-') { | |
1373 | set = false; | |
1374 | } else { | |
1375 | if (res_string) { | |
1376 | *res_string = xasprintf("%s: %s must be preceded by '+' " | |
1377 | "(for SET) or '-' (NOT SET)", s, | |
1378 | field_name); | |
1379 | } | |
1380 | return -EINVAL; | |
1381 | } | |
1382 | s++; | |
1383 | n++; | |
1384 | ||
1385 | for (bit = 1; bit; bit <<= 1) { | |
1386 | const char *fname = bit_to_string(bit); | |
1387 | ||
1388 | if (!fname) { | |
1389 | continue; | |
1390 | } | |
1391 | ||
1392 | len = strlen(fname); | |
1393 | if (strncmp(s, fname, len) || | |
1394 | (s[len] != '+' && s[len] != '-' && s[len] != end)) { | |
1395 | continue; | |
1396 | } | |
1397 | ||
1398 | if (mask & bit) { | |
1399 | /* bit already set. */ | |
1400 | if (res_string) { | |
1401 | *res_string = xasprintf("%s: Each %s flag can be " | |
1402 | "specified only once", s, | |
1403 | field_name); | |
1404 | } | |
1405 | return -EINVAL; | |
1406 | } | |
1407 | if (!(bit & allowed)) { | |
1408 | goto unknown; | |
1409 | } | |
1410 | if (set) { | |
1411 | flags |= bit; | |
1412 | } | |
1413 | mask |= bit; | |
1414 | break; | |
1415 | } | |
1416 | ||
1417 | if (!bit) { | |
1418 | goto unknown; | |
1419 | } | |
1420 | s += len; | |
1421 | n += len; | |
1422 | } | |
1423 | ||
1424 | *res_flags = flags; | |
1425 | *res_mask = mask; | |
1426 | return n; | |
1427 | } | |
1428 | ||
1429 | /* Parse unmasked flags. If a flag is present, it is set, otherwise | |
1430 | * it is not set. */ | |
1431 | while (s[n] != end) { | |
1432 | unsigned long long int flags; | |
1433 | uint32_t bit; | |
1434 | int n0; | |
1435 | ||
1436 | if (ovs_scan(&s[n], "%lli%n", &flags, &n0)) { | |
1437 | if (flags & ~allowed) { | |
1438 | goto unknown; | |
1439 | } | |
1440 | n += n0 + (s[n + n0] == '|'); | |
1441 | result |= flags; | |
1442 | continue; | |
1443 | } | |
1444 | ||
1445 | for (bit = 1; bit; bit <<= 1) { | |
1446 | const char *name = bit_to_string(bit); | |
1447 | size_t len; | |
1448 | ||
1449 | if (!name) { | |
1450 | continue; | |
1451 | } | |
1452 | ||
1453 | len = strlen(name); | |
1454 | if (!strncmp(s + n, name, len) && | |
1455 | (s[n + len] == '|' || s[n + len] == end)) { | |
1456 | if (!(bit & allowed)) { | |
1457 | goto unknown; | |
1458 | } | |
1459 | result |= bit; | |
1460 | n += len + (s[n + len] == '|'); | |
1461 | break; | |
1462 | } | |
1463 | } | |
1464 | ||
1465 | if (!bit) { | |
1466 | goto unknown; | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | *res_flags = result; | |
1471 | if (res_mask) { | |
1472 | *res_mask = UINT32_MAX; | |
1473 | } | |
1474 | if (res_string) { | |
1475 | *res_string = NULL; | |
1476 | } | |
1477 | return n; | |
1478 | ||
1479 | unknown: | |
1480 | if (res_string) { | |
1481 | *res_string = xasprintf("%s: unknown %s flag(s)", s, field_name); | |
1482 | } | |
1483 | return -EINVAL; | |
1484 | } | |
1485 | ||
064af421 | 1486 | void |
50f96b10 BP |
1487 | flow_format(struct ds *ds, |
1488 | const struct flow *flow, const struct ofputil_port_map *port_map) | |
064af421 | 1489 | { |
aa6c9932 | 1490 | struct match match; |
78c9486d | 1491 | struct flow_wildcards *wc = &match.wc; |
296e07ac | 1492 | |
aa6c9932 | 1493 | match_wc_init(&match, flow); |
78c9486d JR |
1494 | |
1495 | /* As this function is most often used for formatting a packet in a | |
1496 | * packet-in message, skip formatting the packet context fields that are | |
e6d9ab56 JR |
1497 | * all-zeroes to make the print-out easier on the eyes. This means that a |
1498 | * missing context field implies a zero value for that field. This is | |
1499 | * similar to OpenFlow encoding of these fields, as the specification | |
1500 | * states that all-zeroes context fields should not be encoded in the | |
1501 | * packet-in messages. */ | |
1502 | if (!flow->in_port.ofp_port) { | |
1503 | WC_UNMASK_FIELD(wc, in_port); | |
1504 | } | |
78c9486d JR |
1505 | if (!flow->skb_priority) { |
1506 | WC_UNMASK_FIELD(wc, skb_priority); | |
1507 | } | |
1508 | if (!flow->pkt_mark) { | |
1509 | WC_UNMASK_FIELD(wc, pkt_mark); | |
1510 | } | |
1511 | if (!flow->recirc_id) { | |
1512 | WC_UNMASK_FIELD(wc, recirc_id); | |
1513 | } | |
330de069 JR |
1514 | if (!flow->dp_hash) { |
1515 | WC_UNMASK_FIELD(wc, dp_hash); | |
1516 | } | |
07659514 JS |
1517 | if (!flow->ct_state) { |
1518 | WC_UNMASK_FIELD(wc, ct_state); | |
1519 | } | |
1520 | if (!flow->ct_zone) { | |
1521 | WC_UNMASK_FIELD(wc, ct_zone); | |
1522 | } | |
8e53fe8c JS |
1523 | if (!flow->ct_mark) { |
1524 | WC_UNMASK_FIELD(wc, ct_mark); | |
1525 | } | |
2ff8484b | 1526 | if (ovs_u128_is_zero(flow->ct_label)) { |
9daf2348 JS |
1527 | WC_UNMASK_FIELD(wc, ct_label); |
1528 | } | |
daf4d3c1 JR |
1529 | if (!is_ct_valid(flow, &match.wc, NULL) || !flow->ct_nw_proto) { |
1530 | WC_UNMASK_FIELD(wc, ct_nw_proto); | |
1531 | WC_UNMASK_FIELD(wc, ct_tp_src); | |
1532 | WC_UNMASK_FIELD(wc, ct_tp_dst); | |
1533 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1534 | WC_UNMASK_FIELD(wc, ct_nw_src); | |
1535 | WC_UNMASK_FIELD(wc, ct_nw_dst); | |
1536 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1537 | WC_UNMASK_FIELD(wc, ct_ipv6_src); | |
1538 | WC_UNMASK_FIELD(wc, ct_ipv6_dst); | |
1539 | } | |
1540 | } | |
78c9486d JR |
1541 | for (int i = 0; i < FLOW_N_REGS; i++) { |
1542 | if (!flow->regs[i]) { | |
1543 | WC_UNMASK_FIELD(wc, regs[i]); | |
1544 | } | |
1545 | } | |
1546 | if (!flow->metadata) { | |
1547 | WC_UNMASK_FIELD(wc, metadata); | |
1548 | } | |
1549 | ||
50f96b10 | 1550 | match_format(&match, port_map, ds, OFP_DEFAULT_PRIORITY); |
064af421 BP |
1551 | } |
1552 | ||
1553 | void | |
50f96b10 BP |
1554 | flow_print(FILE *stream, |
1555 | const struct flow *flow, const struct ofputil_port_map *port_map) | |
064af421 | 1556 | { |
50f96b10 | 1557 | char *s = flow_to_string(flow, port_map); |
064af421 BP |
1558 | fputs(s, stream); |
1559 | free(s); | |
1560 | } | |
54363004 BP |
1561 | \f |
1562 | /* flow_wildcards functions. */ | |
1563 | ||
d8ae4d67 | 1564 | /* Initializes 'wc' as a set of wildcards that matches every packet. */ |
54363004 | 1565 | void |
d8ae4d67 | 1566 | flow_wildcards_init_catchall(struct flow_wildcards *wc) |
54363004 | 1567 | { |
659c2346 | 1568 | memset(&wc->masks, 0, sizeof wc->masks); |
54363004 BP |
1569 | } |
1570 | ||
78c9486d JR |
1571 | /* Converts a flow into flow wildcards. It sets the wildcard masks based on |
1572 | * the packet headers extracted to 'flow'. It will not set the mask for fields | |
1573 | * that do not make sense for the packet type. OpenFlow-only metadata is | |
1574 | * wildcarded, but other metadata is unconditionally exact-matched. */ | |
f0fb825a EG |
1575 | void |
1576 | flow_wildcards_init_for_packet(struct flow_wildcards *wc, | |
1577 | const struct flow *flow) | |
78c9486d | 1578 | { |
cb1145d1 ZB |
1579 | ovs_be16 dl_type = OVS_BE16_MAX; |
1580 | ||
78c9486d JR |
1581 | memset(&wc->masks, 0x0, sizeof wc->masks); |
1582 | ||
0de8783a | 1583 | /* Update this function whenever struct flow changes. */ |
3d2fbd70 | 1584 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 40); |
0de8783a | 1585 | |
ffe4c74f | 1586 | if (flow_tnl_dst_is_set(&flow->tunnel)) { |
78c9486d JR |
1587 | if (flow->tunnel.flags & FLOW_TNL_F_KEY) { |
1588 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1589 | } | |
1590 | WC_MASK_FIELD(wc, tunnel.ip_src); | |
1591 | WC_MASK_FIELD(wc, tunnel.ip_dst); | |
ffe4c74f JB |
1592 | WC_MASK_FIELD(wc, tunnel.ipv6_src); |
1593 | WC_MASK_FIELD(wc, tunnel.ipv6_dst); | |
78c9486d JR |
1594 | WC_MASK_FIELD(wc, tunnel.flags); |
1595 | WC_MASK_FIELD(wc, tunnel.ip_tos); | |
1596 | WC_MASK_FIELD(wc, tunnel.ip_ttl); | |
1597 | WC_MASK_FIELD(wc, tunnel.tp_src); | |
1598 | WC_MASK_FIELD(wc, tunnel.tp_dst); | |
ac6073e3 MC |
1599 | WC_MASK_FIELD(wc, tunnel.gbp_id); |
1600 | WC_MASK_FIELD(wc, tunnel.gbp_flags); | |
9558d2a5 | 1601 | |
6728d578 JG |
1602 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1603 | if (flow->tunnel.metadata.present.map) { | |
1604 | wc->masks.tunnel.metadata.present.map = | |
1605 | flow->tunnel.metadata.present.map; | |
1606 | WC_MASK_FIELD(wc, tunnel.metadata.opts.u8); | |
8d8ab6c2 | 1607 | WC_MASK_FIELD(wc, tunnel.metadata.tab); |
6728d578 JG |
1608 | } |
1609 | } else { | |
1610 | WC_MASK_FIELD(wc, tunnel.metadata.present.len); | |
1611 | memset(wc->masks.tunnel.metadata.opts.gnv, 0xff, | |
1612 | flow->tunnel.metadata.present.len); | |
9558d2a5 | 1613 | } |
78c9486d JR |
1614 | } else if (flow->tunnel.tun_id) { |
1615 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1616 | } | |
1617 | ||
18080541 | 1618 | /* metadata, regs, and conj_id wildcarded. */ |
78c9486d JR |
1619 | |
1620 | WC_MASK_FIELD(wc, skb_priority); | |
1621 | WC_MASK_FIELD(wc, pkt_mark); | |
07659514 JS |
1622 | WC_MASK_FIELD(wc, ct_state); |
1623 | WC_MASK_FIELD(wc, ct_zone); | |
8e53fe8c | 1624 | WC_MASK_FIELD(wc, ct_mark); |
9daf2348 | 1625 | WC_MASK_FIELD(wc, ct_label); |
78c9486d JR |
1626 | WC_MASK_FIELD(wc, recirc_id); |
1627 | WC_MASK_FIELD(wc, dp_hash); | |
1628 | WC_MASK_FIELD(wc, in_port); | |
1629 | ||
c61f3870 BP |
1630 | /* actset_output wildcarded. */ |
1631 | ||
3d4b2e6e | 1632 | WC_MASK_FIELD(wc, packet_type); |
cb1145d1 ZB |
1633 | if (flow->packet_type == htonl(PT_ETH)) { |
1634 | WC_MASK_FIELD(wc, dl_dst); | |
1635 | WC_MASK_FIELD(wc, dl_src); | |
1636 | WC_MASK_FIELD(wc, dl_type); | |
1637 | /* No need to set mask of inner VLANs that don't exist. */ | |
1638 | for (int i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { | |
1639 | /* Always show the first zero VLAN. */ | |
1640 | WC_MASK_FIELD(wc, vlans[i]); | |
1641 | if (flow->vlans[i].tci == htons(0)) { | |
1642 | break; | |
1643 | } | |
f0fb825a | 1644 | } |
cb1145d1 ZB |
1645 | dl_type = flow->dl_type; |
1646 | } else { | |
1647 | dl_type = pt_ns_type_be(flow->packet_type); | |
f0fb825a | 1648 | } |
78c9486d | 1649 | |
cb1145d1 | 1650 | if (dl_type == htons(ETH_TYPE_IP)) { |
78c9486d JR |
1651 | WC_MASK_FIELD(wc, nw_src); |
1652 | WC_MASK_FIELD(wc, nw_dst); | |
daf4d3c1 JR |
1653 | WC_MASK_FIELD(wc, ct_nw_src); |
1654 | WC_MASK_FIELD(wc, ct_nw_dst); | |
cb1145d1 | 1655 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { |
78c9486d JR |
1656 | WC_MASK_FIELD(wc, ipv6_src); |
1657 | WC_MASK_FIELD(wc, ipv6_dst); | |
1658 | WC_MASK_FIELD(wc, ipv6_label); | |
daf4d3c1 JR |
1659 | if (is_nd(flow, wc)) { |
1660 | WC_MASK_FIELD(wc, arp_sha); | |
1661 | WC_MASK_FIELD(wc, arp_tha); | |
1662 | WC_MASK_FIELD(wc, nd_target); | |
1663 | } else { | |
1664 | WC_MASK_FIELD(wc, ct_ipv6_src); | |
1665 | WC_MASK_FIELD(wc, ct_ipv6_dst); | |
1666 | } | |
cb1145d1 ZB |
1667 | } else if (dl_type == htons(ETH_TYPE_ARP) || |
1668 | dl_type == htons(ETH_TYPE_RARP)) { | |
78c9486d JR |
1669 | WC_MASK_FIELD(wc, nw_src); |
1670 | WC_MASK_FIELD(wc, nw_dst); | |
1671 | WC_MASK_FIELD(wc, nw_proto); | |
1672 | WC_MASK_FIELD(wc, arp_sha); | |
1673 | WC_MASK_FIELD(wc, arp_tha); | |
1674 | return; | |
cb1145d1 | 1675 | } else if (eth_type_mpls(dl_type)) { |
78c9486d JR |
1676 | for (int i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { |
1677 | WC_MASK_FIELD(wc, mpls_lse[i]); | |
1678 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
1679 | break; | |
1680 | } | |
1681 | } | |
1682 | return; | |
3d2fbd70 JS |
1683 | } else if (flow->dl_type == htons(ETH_TYPE_NSH)) { |
1684 | WC_MASK_FIELD(wc, nsh.flags); | |
17553f27 | 1685 | WC_MASK_FIELD(wc, nsh.ttl); |
3d2fbd70 JS |
1686 | WC_MASK_FIELD(wc, nsh.mdtype); |
1687 | WC_MASK_FIELD(wc, nsh.np); | |
17553f27 | 1688 | WC_MASK_FIELD(wc, nsh.path_hdr); |
f59cb331 | 1689 | WC_MASK_FIELD(wc, nsh.context); |
78c9486d JR |
1690 | } else { |
1691 | return; /* Unknown ethertype. */ | |
1692 | } | |
1693 | ||
1694 | /* IPv4 or IPv6. */ | |
1695 | WC_MASK_FIELD(wc, nw_frag); | |
1696 | WC_MASK_FIELD(wc, nw_tos); | |
1697 | WC_MASK_FIELD(wc, nw_ttl); | |
1698 | WC_MASK_FIELD(wc, nw_proto); | |
daf4d3c1 JR |
1699 | WC_MASK_FIELD(wc, ct_nw_proto); |
1700 | WC_MASK_FIELD(wc, ct_tp_src); | |
1701 | WC_MASK_FIELD(wc, ct_tp_dst); | |
78c9486d JR |
1702 | |
1703 | /* No transport layer header in later fragments. */ | |
1704 | if (!(flow->nw_frag & FLOW_NW_FRAG_LATER) && | |
1705 | (flow->nw_proto == IPPROTO_ICMP || | |
1706 | flow->nw_proto == IPPROTO_ICMPV6 || | |
1707 | flow->nw_proto == IPPROTO_TCP || | |
1708 | flow->nw_proto == IPPROTO_UDP || | |
1709 | flow->nw_proto == IPPROTO_SCTP || | |
1710 | flow->nw_proto == IPPROTO_IGMP)) { | |
1711 | WC_MASK_FIELD(wc, tp_src); | |
1712 | WC_MASK_FIELD(wc, tp_dst); | |
1713 | ||
1714 | if (flow->nw_proto == IPPROTO_TCP) { | |
1715 | WC_MASK_FIELD(wc, tcp_flags); | |
78c9486d JR |
1716 | } else if (flow->nw_proto == IPPROTO_IGMP) { |
1717 | WC_MASK_FIELD(wc, igmp_group_ip4); | |
1718 | } | |
1719 | } | |
1720 | } | |
1721 | ||
0de8783a JR |
1722 | /* Return a map of possible fields for a packet of the same type as 'flow'. |
1723 | * Including extra bits in the returned mask is not wrong, it is just less | |
1724 | * optimal. | |
1725 | * | |
1726 | * This is a less precise version of flow_wildcards_init_for_packet() above. */ | |
361d808d | 1727 | void |
5fcff47b | 1728 | flow_wc_map(const struct flow *flow, struct flowmap *map) |
0de8783a JR |
1729 | { |
1730 | /* Update this function whenever struct flow changes. */ | |
3d2fbd70 | 1731 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 40); |
0de8783a | 1732 | |
5fcff47b JR |
1733 | flowmap_init(map); |
1734 | ||
ffe4c74f | 1735 | if (flow_tnl_dst_is_set(&flow->tunnel)) { |
5fcff47b | 1736 | FLOWMAP_SET__(map, tunnel, offsetof(struct flow_tnl, metadata)); |
6728d578 JG |
1737 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1738 | if (flow->tunnel.metadata.present.map) { | |
5fcff47b | 1739 | FLOWMAP_SET(map, tunnel.metadata); |
6728d578 JG |
1740 | } |
1741 | } else { | |
5fcff47b JR |
1742 | FLOWMAP_SET(map, tunnel.metadata.present.len); |
1743 | FLOWMAP_SET__(map, tunnel.metadata.opts.gnv, | |
1744 | flow->tunnel.metadata.present.len); | |
361d808d JR |
1745 | } |
1746 | } | |
0de8783a JR |
1747 | |
1748 | /* Metadata fields that can appear on packet input. */ | |
5fcff47b JR |
1749 | FLOWMAP_SET(map, skb_priority); |
1750 | FLOWMAP_SET(map, pkt_mark); | |
1751 | FLOWMAP_SET(map, recirc_id); | |
1752 | FLOWMAP_SET(map, dp_hash); | |
1753 | FLOWMAP_SET(map, in_port); | |
1754 | FLOWMAP_SET(map, dl_dst); | |
1755 | FLOWMAP_SET(map, dl_src); | |
1756 | FLOWMAP_SET(map, dl_type); | |
f0fb825a | 1757 | FLOWMAP_SET(map, vlans); |
07659514 JS |
1758 | FLOWMAP_SET(map, ct_state); |
1759 | FLOWMAP_SET(map, ct_zone); | |
8e53fe8c | 1760 | FLOWMAP_SET(map, ct_mark); |
9daf2348 | 1761 | FLOWMAP_SET(map, ct_label); |
2482b0b0 | 1762 | FLOWMAP_SET(map, packet_type); |
0de8783a JR |
1763 | |
1764 | /* Ethertype-dependent fields. */ | |
1765 | if (OVS_LIKELY(flow->dl_type == htons(ETH_TYPE_IP))) { | |
5fcff47b JR |
1766 | FLOWMAP_SET(map, nw_src); |
1767 | FLOWMAP_SET(map, nw_dst); | |
1768 | FLOWMAP_SET(map, nw_proto); | |
1769 | FLOWMAP_SET(map, nw_frag); | |
1770 | FLOWMAP_SET(map, nw_tos); | |
1771 | FLOWMAP_SET(map, nw_ttl); | |
8ecb3068 DDP |
1772 | FLOWMAP_SET(map, tp_src); |
1773 | FLOWMAP_SET(map, tp_dst); | |
daf4d3c1 JR |
1774 | FLOWMAP_SET(map, ct_nw_proto); |
1775 | FLOWMAP_SET(map, ct_nw_src); | |
1776 | FLOWMAP_SET(map, ct_nw_dst); | |
1777 | FLOWMAP_SET(map, ct_tp_src); | |
1778 | FLOWMAP_SET(map, ct_tp_dst); | |
5fcff47b | 1779 | |
0de8783a | 1780 | if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_IGMP)) { |
5fcff47b | 1781 | FLOWMAP_SET(map, igmp_group_ip4); |
0de8783a | 1782 | } else { |
5fcff47b | 1783 | FLOWMAP_SET(map, tcp_flags); |
0de8783a JR |
1784 | } |
1785 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
5fcff47b JR |
1786 | FLOWMAP_SET(map, ipv6_src); |
1787 | FLOWMAP_SET(map, ipv6_dst); | |
1788 | FLOWMAP_SET(map, ipv6_label); | |
1789 | FLOWMAP_SET(map, nw_proto); | |
1790 | FLOWMAP_SET(map, nw_frag); | |
1791 | FLOWMAP_SET(map, nw_tos); | |
1792 | FLOWMAP_SET(map, nw_ttl); | |
8ecb3068 DDP |
1793 | FLOWMAP_SET(map, tp_src); |
1794 | FLOWMAP_SET(map, tp_dst); | |
5fcff47b | 1795 | |
daf4d3c1 | 1796 | if (OVS_UNLIKELY(is_nd(flow, NULL))) { |
5fcff47b JR |
1797 | FLOWMAP_SET(map, nd_target); |
1798 | FLOWMAP_SET(map, arp_sha); | |
1799 | FLOWMAP_SET(map, arp_tha); | |
0de8783a | 1800 | } else { |
daf4d3c1 JR |
1801 | FLOWMAP_SET(map, ct_nw_proto); |
1802 | FLOWMAP_SET(map, ct_ipv6_src); | |
1803 | FLOWMAP_SET(map, ct_ipv6_dst); | |
1804 | FLOWMAP_SET(map, ct_tp_src); | |
1805 | FLOWMAP_SET(map, ct_tp_dst); | |
5fcff47b | 1806 | FLOWMAP_SET(map, tcp_flags); |
0de8783a JR |
1807 | } |
1808 | } else if (eth_type_mpls(flow->dl_type)) { | |
5fcff47b | 1809 | FLOWMAP_SET(map, mpls_lse); |
0de8783a JR |
1810 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
1811 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
5fcff47b JR |
1812 | FLOWMAP_SET(map, nw_src); |
1813 | FLOWMAP_SET(map, nw_dst); | |
1814 | FLOWMAP_SET(map, nw_proto); | |
1815 | FLOWMAP_SET(map, arp_sha); | |
1816 | FLOWMAP_SET(map, arp_tha); | |
3d2fbd70 JS |
1817 | } else if (flow->dl_type == htons(ETH_TYPE_NSH)) { |
1818 | FLOWMAP_SET(map, nsh.flags); | |
1819 | FLOWMAP_SET(map, nsh.mdtype); | |
1820 | FLOWMAP_SET(map, nsh.np); | |
17553f27 | 1821 | FLOWMAP_SET(map, nsh.path_hdr); |
f59cb331 | 1822 | FLOWMAP_SET(map, nsh.context); |
0de8783a | 1823 | } |
0de8783a JR |
1824 | } |
1825 | ||
c11c6faa AZ |
1826 | /* Clear the metadata and register wildcard masks. They are not packet |
1827 | * header fields. */ | |
1828 | void | |
1829 | flow_wildcards_clear_non_packet_fields(struct flow_wildcards *wc) | |
1830 | { | |
0de8783a | 1831 | /* Update this function whenever struct flow changes. */ |
3d2fbd70 | 1832 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 40); |
0de8783a | 1833 | |
c11c6faa AZ |
1834 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
1835 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
c61f3870 | 1836 | wc->masks.actset_output = 0; |
18080541 | 1837 | wc->masks.conj_id = 0; |
c11c6faa AZ |
1838 | } |
1839 | ||
ecf1e7ac BP |
1840 | /* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or |
1841 | * fields. */ | |
1842 | bool | |
1843 | flow_wildcards_is_catchall(const struct flow_wildcards *wc) | |
1844 | { | |
d70e8c28 | 1845 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
659c2346 | 1846 | size_t i; |
ecf1e7ac | 1847 | |
d70e8c28 JR |
1848 | for (i = 0; i < FLOW_U64S; i++) { |
1849 | if (wc_u64[i]) { | |
ecf1e7ac BP |
1850 | return false; |
1851 | } | |
1852 | } | |
ecf1e7ac BP |
1853 | return true; |
1854 | } | |
1855 | ||
368eefac EJ |
1856 | /* Sets 'dst' as the bitwise AND of wildcards in 'src1' and 'src2'. |
1857 | * That is, a bit or a field is wildcarded in 'dst' if it is wildcarded | |
1858 | * in 'src1' or 'src2' or both. */ | |
b5d97350 | 1859 | void |
368eefac EJ |
1860 | flow_wildcards_and(struct flow_wildcards *dst, |
1861 | const struct flow_wildcards *src1, | |
1862 | const struct flow_wildcards *src2) | |
b5d97350 | 1863 | { |
d70e8c28 JR |
1864 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1865 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1866 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
659c2346 | 1867 | size_t i; |
a79c50f3 | 1868 | |
d70e8c28 JR |
1869 | for (i = 0; i < FLOW_U64S; i++) { |
1870 | dst_u64[i] = src1_u64[i] & src2_u64[i]; | |
26720e24 | 1871 | } |
b5d97350 BP |
1872 | } |
1873 | ||
368eefac EJ |
1874 | /* Sets 'dst' as the bitwise OR of wildcards in 'src1' and 'src2'. That |
1875 | * is, a bit or a field is wildcarded in 'dst' if it is neither | |
1876 | * wildcarded in 'src1' nor 'src2'. */ | |
1877 | void | |
1878 | flow_wildcards_or(struct flow_wildcards *dst, | |
1879 | const struct flow_wildcards *src1, | |
1880 | const struct flow_wildcards *src2) | |
1881 | { | |
d70e8c28 JR |
1882 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1883 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1884 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
368eefac EJ |
1885 | size_t i; |
1886 | ||
d70e8c28 JR |
1887 | for (i = 0; i < FLOW_U64S; i++) { |
1888 | dst_u64[i] = src1_u64[i] | src2_u64[i]; | |
368eefac EJ |
1889 | } |
1890 | } | |
1891 | ||
b5d97350 BP |
1892 | /* Returns a hash of the wildcards in 'wc'. */ |
1893 | uint32_t | |
1006cda6 | 1894 | flow_wildcards_hash(const struct flow_wildcards *wc, uint32_t basis) |
b5d97350 | 1895 | { |
ac31c5af | 1896 | return flow_hash(&wc->masks, basis); |
b5d97350 BP |
1897 | } |
1898 | ||
1899 | /* Returns true if 'a' and 'b' represent the same wildcards, false if they are | |
1900 | * different. */ | |
1901 | bool | |
1902 | flow_wildcards_equal(const struct flow_wildcards *a, | |
1903 | const struct flow_wildcards *b) | |
1904 | { | |
659c2346 | 1905 | return flow_equal(&a->masks, &b->masks); |
b5d97350 BP |
1906 | } |
1907 | ||
1908 | /* Returns true if at least one bit or field is wildcarded in 'a' but not in | |
1909 | * 'b', false otherwise. */ | |
1910 | bool | |
1911 | flow_wildcards_has_extra(const struct flow_wildcards *a, | |
1912 | const struct flow_wildcards *b) | |
1913 | { | |
d70e8c28 JR |
1914 | const uint64_t *a_u64 = (const uint64_t *) &a->masks; |
1915 | const uint64_t *b_u64 = (const uint64_t *) &b->masks; | |
659c2346 | 1916 | size_t i; |
a79c50f3 | 1917 | |
d70e8c28 JR |
1918 | for (i = 0; i < FLOW_U64S; i++) { |
1919 | if ((a_u64[i] & b_u64[i]) != b_u64[i]) { | |
b6c9e612 BP |
1920 | return true; |
1921 | } | |
1922 | } | |
659c2346 BP |
1923 | return false; |
1924 | } | |
b6c9e612 | 1925 | |
659c2346 BP |
1926 | /* Returns true if 'a' and 'b' are equal, except that 0-bits (wildcarded bits) |
1927 | * in 'wc' do not need to be equal in 'a' and 'b'. */ | |
1928 | bool | |
1929 | flow_equal_except(const struct flow *a, const struct flow *b, | |
1930 | const struct flow_wildcards *wc) | |
1931 | { | |
d70e8c28 JR |
1932 | const uint64_t *a_u64 = (const uint64_t *) a; |
1933 | const uint64_t *b_u64 = (const uint64_t *) b; | |
1934 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; | |
659c2346 | 1935 | size_t i; |
d31f1109 | 1936 | |
d70e8c28 JR |
1937 | for (i = 0; i < FLOW_U64S; i++) { |
1938 | if ((a_u64[i] ^ b_u64[i]) & wc_u64[i]) { | |
659c2346 BP |
1939 | return false; |
1940 | } | |
47284b1f | 1941 | } |
659c2346 | 1942 | return true; |
b5d97350 BP |
1943 | } |
1944 | ||
b6c9e612 BP |
1945 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1946 | * (A 0-bit indicates a wildcard bit.) */ | |
1947 | void | |
1948 | flow_wildcards_set_reg_mask(struct flow_wildcards *wc, int idx, uint32_t mask) | |
1949 | { | |
26720e24 | 1950 | wc->masks.regs[idx] = mask; |
b6c9e612 | 1951 | } |
ff55ea1f | 1952 | |
79fe0f46 BP |
1953 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1954 | * (A 0-bit indicates a wildcard bit.) */ | |
1955 | void | |
1956 | flow_wildcards_set_xreg_mask(struct flow_wildcards *wc, int idx, uint64_t mask) | |
1957 | { | |
1958 | flow_set_xreg(&wc->masks, idx, mask); | |
1959 | } | |
1960 | ||
b23ada8e JP |
1961 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1962 | * (A 0-bit indicates a wildcard bit.) */ | |
1963 | void | |
1964 | flow_wildcards_set_xxreg_mask(struct flow_wildcards *wc, int idx, | |
1965 | ovs_u128 mask) | |
1966 | { | |
1967 | flow_set_xxreg(&wc->masks, idx, mask); | |
1968 | } | |
1969 | ||
28a560d9 JR |
1970 | /* Calculates the 5-tuple hash from the given miniflow. |
1971 | * This returns the same value as flow_hash_5tuple for the corresponding | |
1972 | * flow. */ | |
4f150744 JR |
1973 | uint32_t |
1974 | miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis) | |
1975 | { | |
3d2fbd70 | 1976 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 40); |
28a560d9 | 1977 | uint32_t hash = basis; |
4f150744 | 1978 | |
28a560d9 JR |
1979 | if (flow) { |
1980 | ovs_be16 dl_type = MINIFLOW_GET_BE16(flow, dl_type); | |
362ad4ba | 1981 | uint8_t nw_proto; |
28a560d9 | 1982 | |
28a560d9 | 1983 | if (dl_type == htons(ETH_TYPE_IPV6)) { |
5fcff47b | 1984 | struct flowmap map = FLOWMAP_EMPTY_INITIALIZER; |
d70e8c28 | 1985 | uint64_t value; |
4f150744 | 1986 | |
5fcff47b JR |
1987 | FLOWMAP_SET(&map, ipv6_src); |
1988 | FLOWMAP_SET(&map, ipv6_dst); | |
1989 | ||
1990 | MINIFLOW_FOR_EACH_IN_FLOWMAP(value, flow, map) { | |
d70e8c28 | 1991 | hash = hash_add64(hash, value); |
28a560d9 | 1992 | } |
362ad4ba DDP |
1993 | } else if (dl_type == htons(ETH_TYPE_IP) |
1994 | || dl_type == htons(ETH_TYPE_ARP)) { | |
d70e8c28 JR |
1995 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_src)); |
1996 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_dst)); | |
362ad4ba DDP |
1997 | } else { |
1998 | goto out; | |
28a560d9 | 1999 | } |
362ad4ba DDP |
2000 | |
2001 | nw_proto = MINIFLOW_GET_U8(flow, nw_proto); | |
2002 | hash = hash_add(hash, nw_proto); | |
2003 | if (nw_proto != IPPROTO_TCP && nw_proto != IPPROTO_UDP | |
2004 | && nw_proto != IPPROTO_SCTP && nw_proto != IPPROTO_ICMP | |
2005 | && nw_proto != IPPROTO_ICMPV6) { | |
2006 | goto out; | |
2007 | } | |
2008 | ||
d70e8c28 | 2009 | /* Add both ports at once. */ |
f825fdd4 | 2010 | hash = hash_add(hash, (OVS_FORCE uint32_t) miniflow_get_ports(flow)); |
28a560d9 | 2011 | } |
362ad4ba DDP |
2012 | out: |
2013 | return hash_finish(hash, 42); | |
4f150744 JR |
2014 | } |
2015 | ||
268eca11 BP |
2016 | ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst); |
2017 | ASSERT_SEQUENTIAL(ipv6_src, ipv6_dst); | |
4f150744 | 2018 | |
63be20be AW |
2019 | /* Calculates the 5-tuple hash from the given flow. */ |
2020 | uint32_t | |
2021 | flow_hash_5tuple(const struct flow *flow, uint32_t basis) | |
2022 | { | |
3d2fbd70 | 2023 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 40); |
28a560d9 | 2024 | uint32_t hash = basis; |
63be20be | 2025 | |
28a560d9 | 2026 | if (flow) { |
28a560d9 JR |
2027 | |
2028 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
d70e8c28 JR |
2029 | const uint64_t *flow_u64 = (const uint64_t *)flow; |
2030 | int ofs = offsetof(struct flow, ipv6_src) / 8; | |
2031 | int end = ofs + 2 * sizeof flow->ipv6_src / 8; | |
63be20be | 2032 | |
d70e8c28 JR |
2033 | for (;ofs < end; ofs++) { |
2034 | hash = hash_add64(hash, flow_u64[ofs]); | |
28a560d9 | 2035 | } |
362ad4ba DDP |
2036 | } else if (flow->dl_type == htons(ETH_TYPE_IP) |
2037 | || flow->dl_type == htons(ETH_TYPE_ARP)) { | |
33c6a1b9 JR |
2038 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_src); |
2039 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_dst); | |
362ad4ba DDP |
2040 | } else { |
2041 | goto out; | |
28a560d9 | 2042 | } |
362ad4ba DDP |
2043 | |
2044 | hash = hash_add(hash, flow->nw_proto); | |
2045 | if (flow->nw_proto != IPPROTO_TCP && flow->nw_proto != IPPROTO_UDP | |
2046 | && flow->nw_proto != IPPROTO_SCTP && flow->nw_proto != IPPROTO_ICMP | |
2047 | && flow->nw_proto != IPPROTO_ICMPV6) { | |
2048 | goto out; | |
2049 | } | |
2050 | ||
d70e8c28 JR |
2051 | /* Add both ports at once. */ |
2052 | hash = hash_add(hash, | |
2053 | ((const uint32_t *)flow)[offsetof(struct flow, tp_src) | |
2054 | / sizeof(uint32_t)]); | |
28a560d9 | 2055 | } |
362ad4ba DDP |
2056 | out: |
2057 | return hash_finish(hash, 42); /* Arbitrary number. */ | |
63be20be AW |
2058 | } |
2059 | ||
ff55ea1f EJ |
2060 | /* Hashes 'flow' based on its L2 through L4 protocol information. */ |
2061 | uint32_t | |
2062 | flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis) | |
2063 | { | |
2064 | struct { | |
d31f1109 JP |
2065 | union { |
2066 | ovs_be32 ipv4_addr; | |
2067 | struct in6_addr ipv6_addr; | |
2068 | }; | |
ff55ea1f EJ |
2069 | ovs_be16 eth_type; |
2070 | ovs_be16 vlan_tci; | |
5b909cbb | 2071 | ovs_be16 tp_port; |
74ff3298 | 2072 | struct eth_addr eth_addr; |
ff55ea1f EJ |
2073 | uint8_t ip_proto; |
2074 | } fields; | |
2075 | ||
2076 | int i; | |
2077 | ||
2078 | memset(&fields, 0, sizeof fields); | |
74ff3298 JR |
2079 | for (i = 0; i < ARRAY_SIZE(fields.eth_addr.be16); i++) { |
2080 | fields.eth_addr.be16[i] = flow->dl_src.be16[i] ^ flow->dl_dst.be16[i]; | |
ff55ea1f | 2081 | } |
f0fb825a EG |
2082 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { |
2083 | fields.vlan_tci ^= flow->vlans[i].tci & htons(VLAN_VID_MASK); | |
2084 | } | |
ff55ea1f | 2085 | fields.eth_type = flow->dl_type; |
3e3eda95 EJ |
2086 | |
2087 | /* UDP source and destination port are not taken into account because they | |
2088 | * will not necessarily be symmetric in a bidirectional flow. */ | |
ff55ea1f | 2089 | if (fields.eth_type == htons(ETH_TYPE_IP)) { |
d31f1109 JP |
2090 | fields.ipv4_addr = flow->nw_src ^ flow->nw_dst; |
2091 | fields.ip_proto = flow->nw_proto; | |
c6bcb685 | 2092 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 2093 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
d31f1109 JP |
2094 | } |
2095 | } else if (fields.eth_type == htons(ETH_TYPE_IPV6)) { | |
2096 | const uint8_t *a = &flow->ipv6_src.s6_addr[0]; | |
2097 | const uint8_t *b = &flow->ipv6_dst.s6_addr[0]; | |
2098 | uint8_t *ipv6_addr = &fields.ipv6_addr.s6_addr[0]; | |
2099 | ||
2100 | for (i=0; i<16; i++) { | |
2101 | ipv6_addr[i] = a[i] ^ b[i]; | |
2102 | } | |
ff55ea1f | 2103 | fields.ip_proto = flow->nw_proto; |
c6bcb685 | 2104 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 2105 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
ff55ea1f | 2106 | } |
ff55ea1f | 2107 | } |
c49d1dd1 | 2108 | return jhash_bytes(&fields, sizeof fields, basis); |
ff55ea1f | 2109 | } |
520e9a2a | 2110 | |
4249b547 JB |
2111 | /* Hashes 'flow' based on its L3 through L4 protocol information */ |
2112 | uint32_t | |
2113 | flow_hash_symmetric_l3l4(const struct flow *flow, uint32_t basis, | |
2114 | bool inc_udp_ports) | |
2115 | { | |
2116 | uint32_t hash = basis; | |
2117 | ||
2118 | /* UDP source and destination port are also taken into account. */ | |
2119 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2120 | hash = hash_add(hash, | |
2121 | (OVS_FORCE uint32_t) (flow->nw_src ^ flow->nw_dst)); | |
2122 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2123 | /* IPv6 addresses are 64-bit aligned inside struct flow. */ | |
2124 | const uint64_t *a = ALIGNED_CAST(uint64_t *, flow->ipv6_src.s6_addr); | |
2125 | const uint64_t *b = ALIGNED_CAST(uint64_t *, flow->ipv6_dst.s6_addr); | |
2126 | ||
caaabd19 | 2127 | for (int i = 0; i < sizeof flow->ipv6_src / sizeof *a; i++) { |
4249b547 JB |
2128 | hash = hash_add64(hash, a[i] ^ b[i]); |
2129 | } | |
2130 | } else { | |
2131 | /* Cannot hash non-IP flows */ | |
2132 | return 0; | |
2133 | } | |
2134 | ||
2135 | hash = hash_add(hash, flow->nw_proto); | |
2136 | if (flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP || | |
2137 | (inc_udp_ports && flow->nw_proto == IPPROTO_UDP)) { | |
2138 | hash = hash_add(hash, | |
2139 | (OVS_FORCE uint16_t) (flow->tp_src ^ flow->tp_dst)); | |
2140 | } | |
2141 | ||
2142 | return hash_finish(hash, basis); | |
2143 | } | |
2144 | ||
94639963 JR |
2145 | /* Initialize a flow with random fields that matter for nx_hash_fields. */ |
2146 | void | |
2147 | flow_random_hash_fields(struct flow *flow) | |
2148 | { | |
2149 | uint16_t rnd = random_uint16(); | |
f0fb825a | 2150 | int i; |
94639963 JR |
2151 | |
2152 | /* Initialize to all zeros. */ | |
2153 | memset(flow, 0, sizeof *flow); | |
2154 | ||
74ff3298 JR |
2155 | eth_addr_random(&flow->dl_src); |
2156 | eth_addr_random(&flow->dl_dst); | |
94639963 | 2157 | |
f0fb825a EG |
2158 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { |
2159 | uint16_t vlan = random_uint16() & VLAN_VID_MASK; | |
2160 | flow->vlans[i].tpid = htons(ETH_TYPE_VLAN_8021Q); | |
2161 | flow->vlans[i].tci = htons(vlan | VLAN_CFI); | |
2162 | } | |
94639963 JR |
2163 | |
2164 | /* Make most of the random flows IPv4, some IPv6, and rest random. */ | |
2165 | flow->dl_type = rnd < 0x8000 ? htons(ETH_TYPE_IP) : | |
2166 | rnd < 0xc000 ? htons(ETH_TYPE_IPV6) : (OVS_FORCE ovs_be16)rnd; | |
2167 | ||
2168 | if (dl_type_is_ip_any(flow->dl_type)) { | |
2169 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2170 | flow->nw_src = (OVS_FORCE ovs_be32)random_uint32(); | |
2171 | flow->nw_dst = (OVS_FORCE ovs_be32)random_uint32(); | |
2172 | } else { | |
2173 | random_bytes(&flow->ipv6_src, sizeof flow->ipv6_src); | |
2174 | random_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst); | |
2175 | } | |
2176 | /* Make most of IP flows TCP, some UDP or SCTP, and rest random. */ | |
2177 | rnd = random_uint16(); | |
2178 | flow->nw_proto = rnd < 0x8000 ? IPPROTO_TCP : | |
2179 | rnd < 0xc000 ? IPPROTO_UDP : | |
2180 | rnd < 0xd000 ? IPPROTO_SCTP : (uint8_t)rnd; | |
2181 | if (flow->nw_proto == IPPROTO_TCP || | |
2182 | flow->nw_proto == IPPROTO_UDP || | |
2183 | flow->nw_proto == IPPROTO_SCTP) { | |
2184 | flow->tp_src = (OVS_FORCE ovs_be16)random_uint16(); | |
2185 | flow->tp_dst = (OVS_FORCE ovs_be16)random_uint16(); | |
2186 | } | |
2187 | } | |
2188 | } | |
2189 | ||
bcd2633a JP |
2190 | /* Masks the fields in 'wc' that are used by the flow hash 'fields'. */ |
2191 | void | |
6cdd5145 JP |
2192 | flow_mask_hash_fields(const struct flow *flow, struct flow_wildcards *wc, |
2193 | enum nx_hash_fields fields) | |
bcd2633a | 2194 | { |
f0fb825a | 2195 | int i; |
bcd2633a JP |
2196 | switch (fields) { |
2197 | case NX_HASH_FIELDS_ETH_SRC: | |
2198 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
2199 | break; | |
2200 | ||
2201 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
2202 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
2203 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
6cdd5145 JP |
2204 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2205 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2206 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
7f8a65ca | 2207 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
6cdd5145 JP |
2208 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); |
2209 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2210 | } | |
2211 | if (is_ip_any(flow)) { | |
2212 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
d8d9c698 | 2213 | flow_unwildcard_tp_ports(flow, wc); |
6cdd5145 | 2214 | } |
f0fb825a EG |
2215 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { |
2216 | wc->masks.vlans[i].tci |= htons(VLAN_VID_MASK | VLAN_CFI); | |
2217 | } | |
bcd2633a JP |
2218 | break; |
2219 | ||
4249b547 JB |
2220 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: |
2221 | if (is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP) { | |
2222 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
2223 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
2224 | } | |
73c7216a | 2225 | /* fall through */ |
4249b547 JB |
2226 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: |
2227 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2228 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2229 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
2230 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2231 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); | |
2232 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2233 | } else { | |
2234 | break; /* non-IP flow */ | |
2235 | } | |
2236 | ||
2237 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
2238 | if (flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP) { | |
2239 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
2240 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
2241 | } | |
2242 | break; | |
2243 | ||
417cfdb6 | 2244 | case NX_HASH_FIELDS_NW_SRC: |
2245 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2246 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2247 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2248 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); | |
2249 | } | |
2250 | break; | |
2251 | ||
2252 | case NX_HASH_FIELDS_NW_DST: | |
2253 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2254 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
2255 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2256 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2257 | } | |
2258 | break; | |
2259 | ||
bcd2633a | 2260 | default: |
428b2edd | 2261 | OVS_NOT_REACHED(); |
bcd2633a JP |
2262 | } |
2263 | } | |
2264 | ||
520e9a2a EJ |
2265 | /* Hashes the portions of 'flow' designated by 'fields'. */ |
2266 | uint32_t | |
2267 | flow_hash_fields(const struct flow *flow, enum nx_hash_fields fields, | |
2268 | uint16_t basis) | |
2269 | { | |
2270 | switch (fields) { | |
2271 | ||
2272 | case NX_HASH_FIELDS_ETH_SRC: | |
74ff3298 | 2273 | return jhash_bytes(&flow->dl_src, sizeof flow->dl_src, basis); |
520e9a2a EJ |
2274 | |
2275 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
2276 | return flow_hash_symmetric_l4(flow, basis); | |
4249b547 JB |
2277 | |
2278 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: | |
2279 | return flow_hash_symmetric_l3l4(flow, basis, false); | |
2280 | ||
2281 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: | |
2282 | return flow_hash_symmetric_l3l4(flow, basis, true); | |
2283 | ||
417cfdb6 | 2284 | case NX_HASH_FIELDS_NW_SRC: |
2285 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2286 | return jhash_bytes(&flow->nw_src, sizeof flow->nw_src, basis); | |
2287 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2288 | return jhash_bytes(&flow->ipv6_src, sizeof flow->ipv6_src, basis); | |
2289 | } else { | |
2290 | return basis; | |
2291 | } | |
2292 | ||
2293 | case NX_HASH_FIELDS_NW_DST: | |
2294 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2295 | return jhash_bytes(&flow->nw_dst, sizeof flow->nw_dst, basis); | |
2296 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2297 | return jhash_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst, basis); | |
2298 | } else { | |
2299 | return basis; | |
2300 | } | |
2301 | ||
520e9a2a EJ |
2302 | } |
2303 | ||
428b2edd | 2304 | OVS_NOT_REACHED(); |
520e9a2a EJ |
2305 | } |
2306 | ||
2307 | /* Returns a string representation of 'fields'. */ | |
2308 | const char * | |
2309 | flow_hash_fields_to_str(enum nx_hash_fields fields) | |
2310 | { | |
2311 | switch (fields) { | |
2312 | case NX_HASH_FIELDS_ETH_SRC: return "eth_src"; | |
2313 | case NX_HASH_FIELDS_SYMMETRIC_L4: return "symmetric_l4"; | |
4249b547 JB |
2314 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: return "symmetric_l3l4"; |
2315 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: return "symmetric_l3l4+udp"; | |
417cfdb6 | 2316 | case NX_HASH_FIELDS_NW_SRC: return "nw_src"; |
2317 | case NX_HASH_FIELDS_NW_DST: return "nw_dst"; | |
520e9a2a EJ |
2318 | default: return "<unknown>"; |
2319 | } | |
2320 | } | |
2321 | ||
2322 | /* Returns true if the value of 'fields' is supported. Otherwise false. */ | |
2323 | bool | |
2324 | flow_hash_fields_valid(enum nx_hash_fields fields) | |
2325 | { | |
2326 | return fields == NX_HASH_FIELDS_ETH_SRC | |
4249b547 JB |
2327 | || fields == NX_HASH_FIELDS_SYMMETRIC_L4 |
2328 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4 | |
417cfdb6 | 2329 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP |
2330 | || fields == NX_HASH_FIELDS_NW_SRC | |
2331 | || fields == NX_HASH_FIELDS_NW_DST; | |
520e9a2a | 2332 | } |
8b3b8dd1 | 2333 | |
368eefac EJ |
2334 | /* Returns a hash value for the bits of 'flow' that are active based on |
2335 | * 'wc', given 'basis'. */ | |
2336 | uint32_t | |
2337 | flow_hash_in_wildcards(const struct flow *flow, | |
2338 | const struct flow_wildcards *wc, uint32_t basis) | |
2339 | { | |
d70e8c28 JR |
2340 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
2341 | const uint64_t *flow_u64 = (const uint64_t *) flow; | |
368eefac EJ |
2342 | uint32_t hash; |
2343 | size_t i; | |
2344 | ||
2345 | hash = basis; | |
d70e8c28 JR |
2346 | for (i = 0; i < FLOW_U64S; i++) { |
2347 | hash = hash_add64(hash, flow_u64[i] & wc_u64[i]); | |
368eefac | 2348 | } |
d70e8c28 | 2349 | return hash_finish(hash, 8 * FLOW_U64S); |
368eefac EJ |
2350 | } |
2351 | ||
3719455c BP |
2352 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
2353 | * OpenFlow 1.0 "dl_vlan" value: | |
2354 | * | |
f0fb825a | 2355 | * - If it is in the range 0...4095, 'flow->vlans[0].tci' is set to match |
3719455c BP |
2356 | * that VLAN. Any existing PCP match is unchanged (it becomes 0 if |
2357 | * 'flow' previously matched packets without a VLAN header). | |
2358 | * | |
2359 | * - If it is OFP_VLAN_NONE, 'flow->vlan_tci' is set to match a packet | |
2360 | * without a VLAN tag. | |
2361 | * | |
2362 | * - Other values of 'vid' should not be used. */ | |
2363 | void | |
fb0451d9 | 2364 | flow_set_dl_vlan(struct flow *flow, ovs_be16 vid) |
3719455c | 2365 | { |
0c436519 | 2366 | if (vid == htons(OFP10_VLAN_NONE)) { |
f0fb825a | 2367 | flow->vlans[0].tci = htons(0); |
3719455c BP |
2368 | } else { |
2369 | vid &= htons(VLAN_VID_MASK); | |
f0fb825a EG |
2370 | flow->vlans[0].tci &= ~htons(VLAN_VID_MASK); |
2371 | flow->vlans[0].tci |= htons(VLAN_CFI) | vid; | |
2372 | } | |
2373 | } | |
2374 | ||
2375 | /* Sets the VLAN header TPID, which must be either ETH_TYPE_VLAN_8021Q or | |
2376 | * ETH_TYPE_VLAN_8021AD. */ | |
2377 | void | |
2378 | flow_fix_vlan_tpid(struct flow *flow) | |
2379 | { | |
2380 | if (flow->vlans[0].tpid == htons(0) && flow->vlans[0].tci != 0) { | |
2381 | flow->vlans[0].tpid = htons(ETH_TYPE_VLAN_8021Q); | |
3719455c BP |
2382 | } |
2383 | } | |
2384 | ||
cc34bc8c BP |
2385 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
2386 | * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID | |
2387 | * plus CFI). */ | |
2388 | void | |
2389 | flow_set_vlan_vid(struct flow *flow, ovs_be16 vid) | |
2390 | { | |
2391 | ovs_be16 mask = htons(VLAN_VID_MASK | VLAN_CFI); | |
f0fb825a EG |
2392 | flow->vlans[0].tci &= ~mask; |
2393 | flow->vlans[0].tci |= vid & mask; | |
cc34bc8c BP |
2394 | } |
2395 | ||
3719455c BP |
2396 | /* Sets the VLAN PCP that 'flow' matches to 'pcp', which should be in the |
2397 | * range 0...7. | |
2398 | * | |
2399 | * This function has no effect on the VLAN ID that 'flow' matches. | |
2400 | * | |
2401 | * After calling this function, 'flow' will not match packets without a VLAN | |
2402 | * header. */ | |
2403 | void | |
2404 | flow_set_vlan_pcp(struct flow *flow, uint8_t pcp) | |
2405 | { | |
2406 | pcp &= 0x07; | |
f0fb825a EG |
2407 | flow->vlans[0].tci &= ~htons(VLAN_PCP_MASK); |
2408 | flow->vlans[0].tci |= htons((pcp << VLAN_PCP_SHIFT) | VLAN_CFI); | |
2409 | } | |
2410 | ||
2411 | /* Counts the number of VLAN headers. */ | |
2412 | int | |
2413 | flow_count_vlan_headers(const struct flow *flow) | |
2414 | { | |
2415 | int i; | |
2416 | ||
2417 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { | |
2418 | if (!(flow->vlans[i].tci & htons(VLAN_CFI))) { | |
2419 | break; | |
2420 | } | |
2421 | } | |
2422 | return i; | |
2423 | } | |
2424 | ||
2425 | /* Given '*p_an' and '*p_bn' pointing to one past the last VLAN header of | |
2426 | * 'a' and 'b' respectively, skip common VLANs so that they point to the | |
2427 | * first different VLAN counting from bottom. */ | |
2428 | void | |
2429 | flow_skip_common_vlan_headers(const struct flow *a, int *p_an, | |
2430 | const struct flow *b, int *p_bn) | |
2431 | { | |
2432 | int an = *p_an, bn = *p_bn; | |
2433 | ||
2434 | for (an--, bn--; an >= 0 && bn >= 0; an--, bn--) { | |
2435 | if (a->vlans[an].qtag != b->vlans[bn].qtag) { | |
2436 | break; | |
2437 | } | |
2438 | } | |
2439 | *p_an = an; | |
2440 | *p_bn = bn; | |
2441 | } | |
2442 | ||
2443 | void | |
2444 | flow_pop_vlan(struct flow *flow, struct flow_wildcards *wc) | |
2445 | { | |
2446 | int n = flow_count_vlan_headers(flow); | |
68c744fd BP |
2447 | if (n > 1) { |
2448 | if (wc) { | |
2449 | memset(&wc->masks.vlans[1], 0xff, | |
2450 | sizeof(union flow_vlan_hdr) * (n - 1)); | |
2451 | } | |
2452 | memmove(&flow->vlans[0], &flow->vlans[1], | |
2453 | sizeof(union flow_vlan_hdr) * (n - 1)); | |
f0fb825a | 2454 | } |
68c744fd BP |
2455 | if (n > 0) { |
2456 | memset(&flow->vlans[n - 1], 0, sizeof(union flow_vlan_hdr)); | |
f0fb825a | 2457 | } |
f0fb825a EG |
2458 | } |
2459 | ||
2460 | void | |
2461 | flow_push_vlan_uninit(struct flow *flow, struct flow_wildcards *wc) | |
2462 | { | |
2463 | if (wc) { | |
2464 | int n = flow_count_vlan_headers(flow); | |
6b6b508b DB |
2465 | if (n) { |
2466 | memset(wc->masks.vlans, 0xff, sizeof(union flow_vlan_hdr) * n); | |
2467 | } | |
f0fb825a EG |
2468 | } |
2469 | memmove(&flow->vlans[1], &flow->vlans[0], | |
2470 | sizeof(union flow_vlan_hdr) * (FLOW_MAX_VLAN_HEADERS - 1)); | |
2471 | memset(&flow->vlans[0], 0, sizeof(union flow_vlan_hdr)); | |
3719455c BP |
2472 | } |
2473 | ||
8bfd0fda BP |
2474 | /* Returns the number of MPLS LSEs present in 'flow' |
2475 | * | |
2476 | * Returns 0 if the 'dl_type' of 'flow' is not an MPLS ethernet type. | |
2477 | * Otherwise traverses 'flow''s MPLS label stack stopping at the | |
2478 | * first entry that has the BoS bit set. If no such entry exists then | |
2479 | * the maximum number of LSEs that can be stored in 'flow' is returned. | |
2480 | */ | |
2481 | int | |
2482 | flow_count_mpls_labels(const struct flow *flow, struct flow_wildcards *wc) | |
2483 | { | |
22d38fca | 2484 | /* dl_type is always masked. */ |
8bfd0fda BP |
2485 | if (eth_type_mpls(flow->dl_type)) { |
2486 | int i; | |
5af43325 | 2487 | int cnt; |
8bfd0fda | 2488 | |
5af43325 PS |
2489 | cnt = 0; |
2490 | for (i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { | |
8bfd0fda BP |
2491 | if (wc) { |
2492 | wc->masks.mpls_lse[i] |= htonl(MPLS_BOS_MASK); | |
2493 | } | |
2494 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
2495 | return i + 1; | |
2496 | } | |
5af43325 PS |
2497 | if (flow->mpls_lse[i]) { |
2498 | cnt++; | |
2499 | } | |
8bfd0fda | 2500 | } |
5af43325 | 2501 | return cnt; |
8bfd0fda BP |
2502 | } else { |
2503 | return 0; | |
2504 | } | |
2505 | } | |
2506 | ||
2507 | /* Returns the number consecutive of MPLS LSEs, starting at the | |
2508 | * innermost LSE, that are common in 'a' and 'b'. | |
2509 | * | |
2510 | * 'an' must be flow_count_mpls_labels(a). | |
2511 | * 'bn' must be flow_count_mpls_labels(b). | |
2512 | */ | |
2513 | int | |
2514 | flow_count_common_mpls_labels(const struct flow *a, int an, | |
2515 | const struct flow *b, int bn, | |
2516 | struct flow_wildcards *wc) | |
2517 | { | |
2518 | int min_n = MIN(an, bn); | |
2519 | if (min_n == 0) { | |
2520 | return 0; | |
2521 | } else { | |
2522 | int common_n = 0; | |
2523 | int a_last = an - 1; | |
2524 | int b_last = bn - 1; | |
2525 | int i; | |
2526 | ||
2527 | for (i = 0; i < min_n; i++) { | |
2528 | if (wc) { | |
2529 | wc->masks.mpls_lse[a_last - i] = OVS_BE32_MAX; | |
2530 | wc->masks.mpls_lse[b_last - i] = OVS_BE32_MAX; | |
2531 | } | |
2532 | if (a->mpls_lse[a_last - i] != b->mpls_lse[b_last - i]) { | |
2533 | break; | |
2534 | } else { | |
2535 | common_n++; | |
2536 | } | |
2537 | } | |
2538 | ||
2539 | return common_n; | |
2540 | } | |
2541 | } | |
2542 | ||
2543 | /* Adds a new outermost MPLS label to 'flow' and changes 'flow''s Ethernet type | |
2544 | * to 'mpls_eth_type', which must be an MPLS Ethertype. | |
2545 | * | |
2546 | * If the new label is the first MPLS label in 'flow', it is generated as; | |
2547 | * | |
2548 | * - label: 2, if 'flow' is IPv6, otherwise 0. | |
2549 | * | |
2550 | * - TTL: IPv4 or IPv6 TTL, if present and nonzero, otherwise 64. | |
2551 | * | |
2552 | * - TC: IPv4 or IPv6 TOS, if present, otherwise 0. | |
2553 | * | |
2554 | * - BoS: 1. | |
2555 | * | |
22d38fca | 2556 | * If the new label is the second or later label MPLS label in 'flow', it is |
8bfd0fda BP |
2557 | * generated as; |
2558 | * | |
368fb7e6 | 2559 | * - label: Copied from outer label. |
8bfd0fda BP |
2560 | * |
2561 | * - TTL: Copied from outer label. | |
2562 | * | |
2563 | * - TC: Copied from outer label. | |
2564 | * | |
2565 | * - BoS: 0. | |
2566 | * | |
2567 | * 'n' must be flow_count_mpls_labels(flow). 'n' must be less than | |
2568 | * FLOW_MAX_MPLS_LABELS (because otherwise flow->mpls_lse[] would overflow). | |
2569 | */ | |
2570 | void | |
2571 | flow_push_mpls(struct flow *flow, int n, ovs_be16 mpls_eth_type, | |
742c0ac3 | 2572 | struct flow_wildcards *wc, bool clear_flow_L3) |
8bfd0fda BP |
2573 | { |
2574 | ovs_assert(eth_type_mpls(mpls_eth_type)); | |
2575 | ovs_assert(n < FLOW_MAX_MPLS_LABELS); | |
2576 | ||
8bfd0fda BP |
2577 | if (n) { |
2578 | int i; | |
2579 | ||
22d38fca JR |
2580 | if (wc) { |
2581 | memset(&wc->masks.mpls_lse, 0xff, sizeof *wc->masks.mpls_lse * n); | |
2582 | } | |
8bfd0fda BP |
2583 | for (i = n; i >= 1; i--) { |
2584 | flow->mpls_lse[i] = flow->mpls_lse[i - 1]; | |
2585 | } | |
22d38fca | 2586 | flow->mpls_lse[0] = (flow->mpls_lse[1] & htonl(~MPLS_BOS_MASK)); |
8bfd0fda BP |
2587 | } else { |
2588 | int label = 0; /* IPv4 Explicit Null. */ | |
2589 | int tc = 0; | |
2590 | int ttl = 64; | |
2591 | ||
2592 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2593 | label = 2; | |
2594 | } | |
2595 | ||
2596 | if (is_ip_any(flow)) { | |
2597 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; | |
22d38fca JR |
2598 | if (wc) { |
2599 | wc->masks.nw_tos |= IP_DSCP_MASK; | |
2600 | wc->masks.nw_ttl = 0xff; | |
2601 | } | |
8bfd0fda BP |
2602 | |
2603 | if (flow->nw_ttl) { | |
2604 | ttl = flow->nw_ttl; | |
2605 | } | |
8bfd0fda BP |
2606 | } |
2607 | ||
2608 | flow->mpls_lse[0] = set_mpls_lse_values(ttl, tc, 1, htonl(label)); | |
2609 | ||
742c0ac3 JR |
2610 | if (clear_flow_L3) { |
2611 | /* Clear all L3 and L4 fields and dp_hash. */ | |
3d2fbd70 | 2612 | BUILD_ASSERT(FLOW_WC_SEQ == 40); |
742c0ac3 JR |
2613 | memset((char *) flow + FLOW_SEGMENT_2_ENDS_AT, 0, |
2614 | sizeof(struct flow) - FLOW_SEGMENT_2_ENDS_AT); | |
2615 | flow->dp_hash = 0; | |
2616 | } | |
8bfd0fda BP |
2617 | } |
2618 | flow->dl_type = mpls_eth_type; | |
2619 | } | |
2620 | ||
2621 | /* Tries to remove the outermost MPLS label from 'flow'. Returns true if | |
2622 | * successful, false otherwise. On success, sets 'flow''s Ethernet type to | |
2623 | * 'eth_type'. | |
2624 | * | |
2625 | * 'n' must be flow_count_mpls_labels(flow). */ | |
2626 | bool | |
2627 | flow_pop_mpls(struct flow *flow, int n, ovs_be16 eth_type, | |
2628 | struct flow_wildcards *wc) | |
2629 | { | |
2630 | int i; | |
2631 | ||
2632 | if (n == 0) { | |
2633 | /* Nothing to pop. */ | |
2634 | return false; | |
22d38fca JR |
2635 | } else if (n == FLOW_MAX_MPLS_LABELS) { |
2636 | if (wc) { | |
2637 | wc->masks.mpls_lse[n - 1] |= htonl(MPLS_BOS_MASK); | |
2638 | } | |
2639 | if (!(flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK))) { | |
2640 | /* Can't pop because don't know what to fill in mpls_lse[n - 1]. */ | |
2641 | return false; | |
2642 | } | |
8bfd0fda BP |
2643 | } |
2644 | ||
22d38fca JR |
2645 | if (wc) { |
2646 | memset(&wc->masks.mpls_lse[1], 0xff, | |
2647 | sizeof *wc->masks.mpls_lse * (n - 1)); | |
2648 | } | |
8bfd0fda BP |
2649 | for (i = 1; i < n; i++) { |
2650 | flow->mpls_lse[i - 1] = flow->mpls_lse[i]; | |
2651 | } | |
2652 | flow->mpls_lse[n - 1] = 0; | |
2653 | flow->dl_type = eth_type; | |
2654 | return true; | |
2655 | } | |
2656 | ||
b02475c5 SH |
2657 | /* Sets the MPLS Label that 'flow' matches to 'label', which is interpreted |
2658 | * as an OpenFlow 1.1 "mpls_label" value. */ | |
2659 | void | |
8bfd0fda | 2660 | flow_set_mpls_label(struct flow *flow, int idx, ovs_be32 label) |
b02475c5 | 2661 | { |
8bfd0fda | 2662 | set_mpls_lse_label(&flow->mpls_lse[idx], label); |
b02475c5 SH |
2663 | } |
2664 | ||
b676167a SH |
2665 | /* Sets the MPLS TTL that 'flow' matches to 'ttl', which should be in the |
2666 | * range 0...255. */ | |
2667 | void | |
8bfd0fda | 2668 | flow_set_mpls_ttl(struct flow *flow, int idx, uint8_t ttl) |
b676167a | 2669 | { |
8bfd0fda | 2670 | set_mpls_lse_ttl(&flow->mpls_lse[idx], ttl); |
b676167a SH |
2671 | } |
2672 | ||
b02475c5 SH |
2673 | /* Sets the MPLS TC that 'flow' matches to 'tc', which should be in the |
2674 | * range 0...7. */ | |
2675 | void | |
8bfd0fda | 2676 | flow_set_mpls_tc(struct flow *flow, int idx, uint8_t tc) |
b02475c5 | 2677 | { |
8bfd0fda | 2678 | set_mpls_lse_tc(&flow->mpls_lse[idx], tc); |
b02475c5 SH |
2679 | } |
2680 | ||
2681 | /* Sets the MPLS BOS bit that 'flow' matches to which should be 0 or 1. */ | |
2682 | void | |
8bfd0fda | 2683 | flow_set_mpls_bos(struct flow *flow, int idx, uint8_t bos) |
b02475c5 | 2684 | { |
8bfd0fda | 2685 | set_mpls_lse_bos(&flow->mpls_lse[idx], bos); |
b02475c5 SH |
2686 | } |
2687 | ||
8bfd0fda BP |
2688 | /* Sets the entire MPLS LSE. */ |
2689 | void | |
2690 | flow_set_mpls_lse(struct flow *flow, int idx, ovs_be32 lse) | |
2691 | { | |
2692 | flow->mpls_lse[idx] = lse; | |
2693 | } | |
52105b67 | 2694 | |
6f068379 BP |
2695 | static void |
2696 | flow_compose_l7(struct dp_packet *p, const void *l7, size_t l7_len) | |
2697 | { | |
2698 | if (l7_len) { | |
2699 | if (l7) { | |
2700 | dp_packet_put(p, l7, l7_len); | |
2701 | } else { | |
2702 | uint8_t *payload = dp_packet_put_uninit(p, l7_len); | |
2703 | for (size_t i = 0; i < l7_len; i++) { | |
2704 | payload[i] = i; | |
2705 | } | |
2706 | } | |
2707 | } | |
2708 | } | |
2709 | ||
437d0d22 | 2710 | static size_t |
6f068379 BP |
2711 | flow_compose_l4(struct dp_packet *p, const struct flow *flow, |
2712 | const void *l7, size_t l7_len) | |
52105b67 | 2713 | { |
89225d65 | 2714 | size_t orig_len = dp_packet_size(p); |
437d0d22 | 2715 | |
52105b67 JR |
2716 | if (!(flow->nw_frag & FLOW_NW_FRAG_ANY) |
2717 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) { | |
2718 | if (flow->nw_proto == IPPROTO_TCP) { | |
89225d65 | 2719 | struct tcp_header *tcp = dp_packet_put_zeros(p, sizeof *tcp); |
52105b67 JR |
2720 | tcp->tcp_src = flow->tp_src; |
2721 | tcp->tcp_dst = flow->tp_dst; | |
2722 | tcp->tcp_ctl = TCP_CTL(ntohs(flow->tcp_flags), 5); | |
6f068379 BP |
2723 | if (!(flow->tcp_flags & htons(TCP_SYN | TCP_FIN | TCP_RST))) { |
2724 | flow_compose_l7(p, l7, l7_len); | |
2725 | } | |
52105b67 | 2726 | } else if (flow->nw_proto == IPPROTO_UDP) { |
89225d65 | 2727 | struct udp_header *udp = dp_packet_put_zeros(p, sizeof *udp); |
52105b67 JR |
2728 | udp->udp_src = flow->tp_src; |
2729 | udp->udp_dst = flow->tp_dst; | |
6f068379 BP |
2730 | udp->udp_len = htons(sizeof *udp + l7_len); |
2731 | flow_compose_l7(p, l7, l7_len); | |
52105b67 | 2732 | } else if (flow->nw_proto == IPPROTO_SCTP) { |
89225d65 | 2733 | struct sctp_header *sctp = dp_packet_put_zeros(p, sizeof *sctp); |
52105b67 JR |
2734 | sctp->sctp_src = flow->tp_src; |
2735 | sctp->sctp_dst = flow->tp_dst; | |
6f068379 | 2736 | /* XXX Someone should figure out what L7 data to include. */ |
52105b67 | 2737 | } else if (flow->nw_proto == IPPROTO_ICMP) { |
89225d65 | 2738 | struct icmp_header *icmp = dp_packet_put_zeros(p, sizeof *icmp); |
52105b67 JR |
2739 | icmp->icmp_type = ntohs(flow->tp_src); |
2740 | icmp->icmp_code = ntohs(flow->tp_dst); | |
6f068379 BP |
2741 | if ((icmp->icmp_type == ICMP4_ECHO_REQUEST || |
2742 | icmp->icmp_type == ICMP4_ECHO_REPLY) | |
2743 | && icmp->icmp_code == 0) { | |
2744 | flow_compose_l7(p, l7, l7_len); | |
2745 | } else { | |
2746 | /* XXX Add inner IP packet for e.g. destination unreachable? */ | |
2747 | } | |
0e612675 | 2748 | } else if (flow->nw_proto == IPPROTO_IGMP) { |
89225d65 | 2749 | struct igmp_header *igmp = dp_packet_put_zeros(p, sizeof *igmp); |
0e612675 FL |
2750 | igmp->igmp_type = ntohs(flow->tp_src); |
2751 | igmp->igmp_code = ntohs(flow->tp_dst); | |
2752 | put_16aligned_be32(&igmp->group, flow->igmp_group_ip4); | |
52105b67 | 2753 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { |
89225d65 | 2754 | struct icmp6_hdr *icmp = dp_packet_put_zeros(p, sizeof *icmp); |
52105b67 JR |
2755 | icmp->icmp6_type = ntohs(flow->tp_src); |
2756 | icmp->icmp6_code = ntohs(flow->tp_dst); | |
2757 | ||
2758 | if (icmp->icmp6_code == 0 && | |
2759 | (icmp->icmp6_type == ND_NEIGHBOR_SOLICIT || | |
2760 | icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) { | |
2761 | struct in6_addr *nd_target; | |
86d46f3c | 2762 | struct ovs_nd_lla_opt *lla_opt; |
52105b67 | 2763 | |
cf62fa4c | 2764 | nd_target = dp_packet_put_zeros(p, sizeof *nd_target); |
52105b67 JR |
2765 | *nd_target = flow->nd_target; |
2766 | ||
2767 | if (!eth_addr_is_zero(flow->arp_sha)) { | |
86d46f3c ZKL |
2768 | lla_opt = dp_packet_put_zeros(p, 8); |
2769 | lla_opt->len = 1; | |
2770 | lla_opt->type = ND_OPT_SOURCE_LINKADDR; | |
2771 | lla_opt->mac = flow->arp_sha; | |
52105b67 JR |
2772 | } |
2773 | if (!eth_addr_is_zero(flow->arp_tha)) { | |
86d46f3c ZKL |
2774 | lla_opt = dp_packet_put_zeros(p, 8); |
2775 | lla_opt->len = 1; | |
2776 | lla_opt->type = ND_OPT_TARGET_LINKADDR; | |
2777 | lla_opt->mac = flow->arp_tha; | |
52105b67 | 2778 | } |
6f068379 BP |
2779 | } else if (icmp->icmp6_code == 0 && |
2780 | (icmp->icmp6_type == ICMP6_ECHO_REQUEST || | |
2781 | icmp->icmp6_type == ICMP6_ECHO_REPLY)) { | |
2782 | flow_compose_l7(p, l7, l7_len); | |
2783 | } else { | |
2784 | /* XXX Add inner IP packet for e.g. destination unreachable? */ | |
52105b67 | 2785 | } |
52105b67 JR |
2786 | } |
2787 | } | |
89225d65 BP |
2788 | |
2789 | return dp_packet_size(p) - orig_len; | |
52105b67 JR |
2790 | } |
2791 | ||
e839d01e DDP |
2792 | static void |
2793 | flow_compose_l4_csum(struct dp_packet *p, const struct flow *flow, | |
2794 | uint32_t pseudo_hdr_csum) | |
2795 | { | |
2796 | size_t l4_len = (char *) dp_packet_tail(p) - (char *) dp_packet_l4(p); | |
2797 | ||
2798 | if (!(flow->nw_frag & FLOW_NW_FRAG_ANY) | |
2799 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) { | |
2800 | if (flow->nw_proto == IPPROTO_TCP) { | |
2801 | struct tcp_header *tcp = dp_packet_l4(p); | |
2802 | ||
3476ce3a | 2803 | tcp->tcp_csum = 0; |
e839d01e DDP |
2804 | tcp->tcp_csum = csum_finish(csum_continue(pseudo_hdr_csum, |
2805 | tcp, l4_len)); | |
2806 | } else if (flow->nw_proto == IPPROTO_UDP) { | |
2807 | struct udp_header *udp = dp_packet_l4(p); | |
2808 | ||
3476ce3a | 2809 | udp->udp_csum = 0; |
e839d01e DDP |
2810 | udp->udp_csum = csum_finish(csum_continue(pseudo_hdr_csum, |
2811 | udp, l4_len)); | |
2812 | } else if (flow->nw_proto == IPPROTO_ICMP) { | |
2813 | struct icmp_header *icmp = dp_packet_l4(p); | |
2814 | ||
3476ce3a | 2815 | icmp->icmp_csum = 0; |
e839d01e DDP |
2816 | icmp->icmp_csum = csum(icmp, l4_len); |
2817 | } else if (flow->nw_proto == IPPROTO_IGMP) { | |
2818 | struct igmp_header *igmp = dp_packet_l4(p); | |
2819 | ||
3476ce3a | 2820 | igmp->igmp_csum = 0; |
e839d01e DDP |
2821 | igmp->igmp_csum = csum(igmp, l4_len); |
2822 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { | |
2823 | struct icmp6_hdr *icmp = dp_packet_l4(p); | |
2824 | ||
3476ce3a | 2825 | icmp->icmp6_cksum = 0; |
e839d01e DDP |
2826 | icmp->icmp6_cksum = (OVS_FORCE uint16_t) |
2827 | csum_finish(csum_continue(pseudo_hdr_csum, icmp, l4_len)); | |
2828 | } | |
2829 | } | |
2830 | } | |
2831 | ||
bc0f5176 AZ |
2832 | /* Increase the size of packet composed by 'flow_compose_minimal' |
2833 | * up to 'size' bytes. Fixes all the required packet headers like | |
2834 | * ip/udp lengths and l3/l4 checksums. | |
2835 | * | |
2836 | * 'size' needs to be larger then the current packet size. */ | |
6f068379 | 2837 | void |
bc0f5176 | 2838 | packet_expand(struct dp_packet *p, const struct flow *flow, size_t size) |
3476ce3a IM |
2839 | { |
2840 | size_t extra_size; | |
2841 | ||
bc0f5176 | 2842 | ovs_assert(size > dp_packet_size(p)); |
3476ce3a IM |
2843 | |
2844 | extra_size = size - dp_packet_size(p); | |
2845 | dp_packet_put_zeros(p, extra_size); | |
2846 | ||
2847 | if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) { | |
2848 | struct eth_header *eth = dp_packet_eth(p); | |
2849 | ||
2850 | eth->eth_type = htons(dp_packet_size(p)); | |
3476ce3a IM |
2851 | } else if (dl_type_is_ip_any(flow->dl_type)) { |
2852 | uint32_t pseudo_hdr_csum; | |
2853 | size_t l4_len = (char *) dp_packet_tail(p) - (char *) dp_packet_l4(p); | |
2854 | ||
2855 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2856 | struct ip_header *ip = dp_packet_l3(p); | |
2857 | ||
2858 | ip->ip_tot_len = htons(p->l4_ofs - p->l3_ofs + l4_len); | |
2859 | ip->ip_csum = 0; | |
2860 | ip->ip_csum = csum(ip, sizeof *ip); | |
2861 | ||
2862 | pseudo_hdr_csum = packet_csum_pseudoheader(ip); | |
2863 | } else { /* ETH_TYPE_IPV6 */ | |
2864 | struct ovs_16aligned_ip6_hdr *nh = dp_packet_l3(p); | |
2865 | ||
2866 | nh->ip6_plen = htons(l4_len); | |
2867 | pseudo_hdr_csum = packet_csum_pseudoheader6(nh); | |
2868 | } | |
2869 | ||
2870 | if ((!(flow->nw_frag & FLOW_NW_FRAG_ANY) | |
2871 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) | |
2872 | && flow->nw_proto == IPPROTO_UDP) { | |
2873 | struct udp_header *udp = dp_packet_l4(p); | |
2874 | ||
2875 | udp->udp_len = htons(l4_len + extra_size); | |
2876 | } | |
2877 | flow_compose_l4_csum(p, flow, pseudo_hdr_csum); | |
2878 | } | |
2879 | } | |
2880 | ||
3e24a894 | 2881 | /* Puts into 'p' a packet that flow_extract() would parse as having the given |
8b3b8dd1 BP |
2882 | * 'flow'. |
2883 | * | |
2884 | * (This is useful only for testing, obviously, and the packet isn't really | |
bc0f5176 AZ |
2885 | * valid. Lots of fields are just zeroed.) |
2886 | * | |
6f068379 BP |
2887 | * For packets whose protocols can encapsulate arbitrary L7 payloads, 'l7' and |
2888 | * 'l7_len' determine that payload: | |
2889 | * | |
2890 | * - If 'l7_len' is zero, no payload is included. | |
2891 | * | |
2892 | * - If 'l7_len' is nonzero and 'l7' is null, an arbitrary payload 'l7_len' | |
2893 | * bytes long is included. | |
2894 | * | |
2895 | * - If 'l7_len' is nonzero and 'l7' is nonnull, the payload is copied | |
2896 | * from 'l7'. */ | |
2897 | void | |
2898 | flow_compose(struct dp_packet *p, const struct flow *flow, | |
2899 | const void *l7, size_t l7_len) | |
8b3b8dd1 | 2900 | { |
e839d01e | 2901 | uint32_t pseudo_hdr_csum; |
437d0d22 JR |
2902 | size_t l4_len; |
2903 | ||
52105b67 | 2904 | /* eth_compose() sets l3 pointer and makes sure it is 32-bit aligned. */ |
cf62fa4c | 2905 | eth_compose(p, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0); |
8b3b8dd1 | 2906 | if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) { |
2482b0b0 | 2907 | struct eth_header *eth = dp_packet_eth(p); |
cf62fa4c | 2908 | eth->eth_type = htons(dp_packet_size(p)); |
8b3b8dd1 BP |
2909 | return; |
2910 | } | |
2911 | ||
f0fb825a EG |
2912 | for (int encaps = FLOW_MAX_VLAN_HEADERS - 1; encaps >= 0; encaps--) { |
2913 | if (flow->vlans[encaps].tci & htons(VLAN_CFI)) { | |
2914 | eth_push_vlan(p, flow->vlans[encaps].tpid, | |
2915 | flow->vlans[encaps].tci); | |
2916 | } | |
8b3b8dd1 BP |
2917 | } |
2918 | ||
cff78c88 | 2919 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
8b3b8dd1 BP |
2920 | struct ip_header *ip; |
2921 | ||
cf62fa4c | 2922 | ip = dp_packet_put_zeros(p, sizeof *ip); |
8b3b8dd1 | 2923 | ip->ip_ihl_ver = IP_IHL_VER(5, 4); |
eadef313 | 2924 | ip->ip_tos = flow->nw_tos; |
aabf5352 | 2925 | ip->ip_ttl = flow->nw_ttl; |
8b3b8dd1 | 2926 | ip->ip_proto = flow->nw_proto; |
7c457c33 BP |
2927 | put_16aligned_be32(&ip->ip_src, flow->nw_src); |
2928 | put_16aligned_be32(&ip->ip_dst, flow->nw_dst); | |
8b3b8dd1 | 2929 | |
eadef313 | 2930 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
7257b535 | 2931 | ip->ip_frag_off |= htons(IP_MORE_FRAGMENTS); |
eadef313 | 2932 | if (flow->nw_frag & FLOW_NW_FRAG_LATER) { |
7257b535 BP |
2933 | ip->ip_frag_off |= htons(100); |
2934 | } | |
2935 | } | |
df9b6612 | 2936 | |
cf62fa4c | 2937 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 2938 | |
6f068379 | 2939 | l4_len = flow_compose_l4(p, flow, l7, l7_len); |
52105b67 | 2940 | |
cf62fa4c PS |
2941 | ip = dp_packet_l3(p); |
2942 | ip->ip_tot_len = htons(p->l4_ofs - p->l3_ofs + l4_len); | |
ece9c294 | 2943 | /* Checksum has already been zeroed by put_zeros call. */ |
dc5a7ce7 | 2944 | ip->ip_csum = csum(ip, sizeof *ip); |
e839d01e DDP |
2945 | |
2946 | pseudo_hdr_csum = packet_csum_pseudoheader(ip); | |
2947 | flow_compose_l4_csum(p, flow, pseudo_hdr_csum); | |
cff78c88 | 2948 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
52105b67 JR |
2949 | struct ovs_16aligned_ip6_hdr *nh; |
2950 | ||
cf62fa4c | 2951 | nh = dp_packet_put_zeros(p, sizeof *nh); |
52105b67 JR |
2952 | put_16aligned_be32(&nh->ip6_flow, htonl(6 << 28) | |
2953 | htonl(flow->nw_tos << 20) | flow->ipv6_label); | |
2954 | nh->ip6_hlim = flow->nw_ttl; | |
2955 | nh->ip6_nxt = flow->nw_proto; | |
2956 | ||
2957 | memcpy(&nh->ip6_src, &flow->ipv6_src, sizeof(nh->ip6_src)); | |
2958 | memcpy(&nh->ip6_dst, &flow->ipv6_dst, sizeof(nh->ip6_dst)); | |
2959 | ||
cf62fa4c | 2960 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 2961 | |
6f068379 | 2962 | l4_len = flow_compose_l4(p, flow, l7, l7_len); |
52105b67 | 2963 | |
cf62fa4c | 2964 | nh = dp_packet_l3(p); |
437d0d22 | 2965 | nh->ip6_plen = htons(l4_len); |
e839d01e DDP |
2966 | |
2967 | pseudo_hdr_csum = packet_csum_pseudoheader6(nh); | |
2968 | flow_compose_l4_csum(p, flow, pseudo_hdr_csum); | |
cff78c88 SH |
2969 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
2970 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
8b3b8dd1 BP |
2971 | struct arp_eth_header *arp; |
2972 | ||
cf62fa4c PS |
2973 | arp = dp_packet_put_zeros(p, sizeof *arp); |
2974 | dp_packet_set_l3(p, arp); | |
8b3b8dd1 BP |
2975 | arp->ar_hrd = htons(1); |
2976 | arp->ar_pro = htons(ETH_TYPE_IP); | |
2977 | arp->ar_hln = ETH_ADDR_LEN; | |
2978 | arp->ar_pln = 4; | |
2979 | arp->ar_op = htons(flow->nw_proto); | |
2980 | ||
2981 | if (flow->nw_proto == ARP_OP_REQUEST || | |
2982 | flow->nw_proto == ARP_OP_REPLY) { | |
7c457c33 BP |
2983 | put_16aligned_be32(&arp->ar_spa, flow->nw_src); |
2984 | put_16aligned_be32(&arp->ar_tpa, flow->nw_dst); | |
74ff3298 JR |
2985 | arp->ar_sha = flow->arp_sha; |
2986 | arp->ar_tha = flow->arp_tha; | |
8b3b8dd1 BP |
2987 | } |
2988 | } | |
b02475c5 SH |
2989 | |
2990 | if (eth_type_mpls(flow->dl_type)) { | |
8bfd0fda BP |
2991 | int n; |
2992 | ||
cf62fa4c | 2993 | p->l2_5_ofs = p->l3_ofs; |
8bfd0fda BP |
2994 | for (n = 1; n < FLOW_MAX_MPLS_LABELS; n++) { |
2995 | if (flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK)) { | |
2996 | break; | |
2997 | } | |
2998 | } | |
2999 | while (n > 0) { | |
cf62fa4c | 3000 | push_mpls(p, flow->dl_type, flow->mpls_lse[--n]); |
8bfd0fda | 3001 | } |
b02475c5 | 3002 | } |
8b3b8dd1 | 3003 | } |
5cb7a798 BP |
3004 | \f |
3005 | /* Compressed flow. */ | |
3006 | ||
df40c152 | 3007 | /* Completes an initialization of 'dst' as a miniflow copy of 'src' begun by |
5fcff47b JR |
3008 | * the caller. The caller must have already computed 'dst->map' properly to |
3009 | * indicate the significant uint64_t elements of 'src'. | |
13751fd8 JR |
3010 | * |
3011 | * Normally the significant elements are the ones that are non-zero. However, | |
3012 | * when a miniflow is initialized from a (mini)mask, the values can be zeroes, | |
ceb3bd67 JR |
3013 | * so that the flow and mask always have the same maps. */ |
3014 | void | |
3015 | miniflow_init(struct miniflow *dst, const struct flow *src) | |
df40c152 | 3016 | { |
09b0fa9c | 3017 | uint64_t *dst_u64 = miniflow_values(dst); |
361d808d | 3018 | size_t idx; |
df40c152 | 3019 | |
5fcff47b JR |
3020 | FLOWMAP_FOR_EACH_INDEX(idx, dst->map) { |
3021 | *dst_u64++ = flow_u64_value(src, idx); | |
df40c152 BP |
3022 | } |
3023 | } | |
3024 | ||
361d808d | 3025 | /* Initialize the maps of 'flow' from 'src'. */ |
ceb3bd67 JR |
3026 | void |
3027 | miniflow_map_init(struct miniflow *flow, const struct flow *src) | |
5cb7a798 | 3028 | { |
ceb3bd67 | 3029 | /* Initialize map, counting the number of nonzero elements. */ |
5fcff47b JR |
3030 | flowmap_init(&flow->map); |
3031 | for (size_t i = 0; i < FLOW_U64S; i++) { | |
3032 | if (flow_u64_value(src, i)) { | |
3033 | flowmap_set(&flow->map, i, 1); | |
5cb7a798 BP |
3034 | } |
3035 | } | |
ceb3bd67 | 3036 | } |
5cb7a798 | 3037 | |
ceb3bd67 JR |
3038 | /* Allocates 'n' count of miniflows, consecutive in memory, initializing the |
3039 | * map of each from 'src'. | |
3040 | * Returns the size of the miniflow data. */ | |
3041 | size_t | |
3042 | miniflow_alloc(struct miniflow *dsts[], size_t n, const struct miniflow *src) | |
3043 | { | |
361d808d JR |
3044 | size_t n_values = miniflow_n_values(src); |
3045 | size_t data_size = MINIFLOW_VALUES_SIZE(n_values); | |
3046 | struct miniflow *dst = xmalloc(n * (sizeof *src + data_size)); | |
5fcff47b | 3047 | size_t i; |
ceb3bd67 JR |
3048 | |
3049 | COVERAGE_INC(miniflow_malloc); | |
3050 | ||
3051 | for (i = 0; i < n; i++) { | |
361d808d | 3052 | *dst = *src; /* Copy maps. */ |
ceb3bd67 | 3053 | dsts[i] = dst; |
361d808d JR |
3054 | dst += 1; /* Just past the maps. */ |
3055 | dst = (struct miniflow *)((uint64_t *)dst + n_values); /* Skip data. */ | |
ceb3bd67 JR |
3056 | } |
3057 | return data_size; | |
df40c152 | 3058 | } |
5cb7a798 | 3059 | |
ceb3bd67 JR |
3060 | /* Returns a miniflow copy of 'src'. The caller must eventually free() the |
3061 | * returned miniflow. */ | |
8fd47924 | 3062 | struct miniflow * |
ceb3bd67 | 3063 | miniflow_create(const struct flow *src) |
df40c152 | 3064 | { |
ceb3bd67 JR |
3065 | struct miniflow tmp; |
3066 | struct miniflow *dst; | |
3067 | ||
3068 | miniflow_map_init(&tmp, src); | |
3069 | ||
3070 | miniflow_alloc(&dst, 1, &tmp); | |
3071 | miniflow_init(dst, src); | |
3072 | return dst; | |
5cb7a798 BP |
3073 | } |
3074 | ||
3016f3e4 | 3075 | /* Initializes 'dst' as a copy of 'src'. The caller must have allocated |
8fd47924 | 3076 | * 'dst' to have inline space for 'n_values' data in 'src'. */ |
3016f3e4 | 3077 | void |
a851eb94 JR |
3078 | miniflow_clone(struct miniflow *dst, const struct miniflow *src, |
3079 | size_t n_values) | |
3016f3e4 | 3080 | { |
361d808d | 3081 | *dst = *src; /* Copy maps. */ |
09b0fa9c JR |
3082 | memcpy(miniflow_values(dst), miniflow_get_values(src), |
3083 | MINIFLOW_VALUES_SIZE(n_values)); | |
5cb7a798 BP |
3084 | } |
3085 | ||
3086 | /* Initializes 'dst' as a copy of 'src'. */ | |
3087 | void | |
3088 | miniflow_expand(const struct miniflow *src, struct flow *dst) | |
3089 | { | |
ad77e3c5 EJ |
3090 | memset(dst, 0, sizeof *dst); |
3091 | flow_union_with_miniflow(dst, src); | |
5cb7a798 BP |
3092 | } |
3093 | ||
8fd47924 | 3094 | /* Returns true if 'a' and 'b' are equal miniflows, false otherwise. */ |
5cb7a798 BP |
3095 | bool |
3096 | miniflow_equal(const struct miniflow *a, const struct miniflow *b) | |
3097 | { | |
09b0fa9c JR |
3098 | const uint64_t *ap = miniflow_get_values(a); |
3099 | const uint64_t *bp = miniflow_get_values(b); | |
5cb7a798 | 3100 | |
5fcff47b JR |
3101 | /* This is mostly called after a matching hash, so it is highly likely that |
3102 | * the maps are equal as well. */ | |
3103 | if (OVS_LIKELY(flowmap_equal(a->map, b->map))) { | |
361d808d | 3104 | return !memcmp(ap, bp, miniflow_n_values(a) * sizeof *ap); |
080e28d0 | 3105 | } else { |
5fcff47b | 3106 | size_t idx; |
df40c152 | 3107 | |
5fcff47b JR |
3108 | FLOWMAP_FOR_EACH_INDEX (idx, flowmap_or(a->map, b->map)) { |
3109 | if ((flowmap_is_set(&a->map, idx) ? *ap++ : 0) | |
3110 | != (flowmap_is_set(&b->map, idx) ? *bp++ : 0)) { | |
080e28d0 | 3111 | return false; |
df40c152 | 3112 | } |
5cb7a798 BP |
3113 | } |
3114 | } | |
3115 | ||
df40c152 | 3116 | return true; |
5cb7a798 BP |
3117 | } |
3118 | ||
de4ad4a2 JR |
3119 | /* Returns false if 'a' and 'b' differ at the places where there are 1-bits |
3120 | * in 'mask', true otherwise. */ | |
5cb7a798 BP |
3121 | bool |
3122 | miniflow_equal_in_minimask(const struct miniflow *a, const struct miniflow *b, | |
3123 | const struct minimask *mask) | |
3124 | { | |
09b0fa9c | 3125 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 3126 | size_t idx; |
5cb7a798 | 3127 | |
5fcff47b | 3128 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
1cea007c | 3129 | if ((miniflow_get(a, idx) ^ miniflow_get(b, idx)) & *p++) { |
080e28d0 | 3130 | return false; |
5cb7a798 BP |
3131 | } |
3132 | } | |
3133 | ||
3134 | return true; | |
3135 | } | |
3136 | ||
3137 | /* Returns true if 'a' and 'b' are equal at the places where there are 1-bits | |
3138 | * in 'mask', false if they differ. */ | |
3139 | bool | |
3140 | miniflow_equal_flow_in_minimask(const struct miniflow *a, const struct flow *b, | |
3141 | const struct minimask *mask) | |
3142 | { | |
09b0fa9c | 3143 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 3144 | size_t idx; |
5cb7a798 | 3145 | |
5fcff47b JR |
3146 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
3147 | if ((miniflow_get(a, idx) ^ flow_u64_value(b, idx)) & *p++) { | |
080e28d0 | 3148 | return false; |
5cb7a798 BP |
3149 | } |
3150 | } | |
3151 | ||
3152 | return true; | |
3153 | } | |
3154 | ||
5cb7a798 | 3155 | \f |
ceb3bd67 JR |
3156 | void |
3157 | minimask_init(struct minimask *mask, const struct flow_wildcards *wc) | |
3158 | { | |
3159 | miniflow_init(&mask->masks, &wc->masks); | |
3160 | } | |
3161 | ||
8fd47924 JR |
3162 | /* Returns a minimask copy of 'wc'. The caller must eventually free the |
3163 | * returned minimask with free(). */ | |
3164 | struct minimask * | |
3165 | minimask_create(const struct flow_wildcards *wc) | |
5cb7a798 | 3166 | { |
8fd47924 | 3167 | return (struct minimask *)miniflow_create(&wc->masks); |
5cb7a798 BP |
3168 | } |
3169 | ||
3170 | /* Initializes 'dst_' as the bit-wise "and" of 'a_' and 'b_'. | |
3171 | * | |
8fd47924 JR |
3172 | * The caller must provide room for FLOW_U64S "uint64_t"s in 'storage', which |
3173 | * must follow '*dst_' in memory, for use by 'dst_'. The caller must *not* | |
3174 | * free 'dst_' free(). */ | |
5cb7a798 BP |
3175 | void |
3176 | minimask_combine(struct minimask *dst_, | |
3177 | const struct minimask *a_, const struct minimask *b_, | |
d70e8c28 | 3178 | uint64_t storage[FLOW_U64S]) |
5cb7a798 BP |
3179 | { |
3180 | struct miniflow *dst = &dst_->masks; | |
d70e8c28 | 3181 | uint64_t *dst_values = storage; |
5cb7a798 BP |
3182 | const struct miniflow *a = &a_->masks; |
3183 | const struct miniflow *b = &b_->masks; | |
361d808d | 3184 | size_t idx; |
5cb7a798 | 3185 | |
5fcff47b | 3186 | flowmap_init(&dst->map); |
080e28d0 | 3187 | |
5fcff47b | 3188 | FLOWMAP_FOR_EACH_INDEX(idx, flowmap_and(a->map, b->map)) { |
361d808d | 3189 | /* Both 'a' and 'b' have non-zero data at 'idx'. */ |
5fcff47b | 3190 | uint64_t mask = *miniflow_get__(a, idx) & *miniflow_get__(b, idx); |
361d808d JR |
3191 | |
3192 | if (mask) { | |
5fcff47b | 3193 | flowmap_set(&dst->map, idx, 1); |
1cea007c | 3194 | *dst_values++ = mask; |
5cb7a798 BP |
3195 | } |
3196 | } | |
3197 | } | |
3198 | ||
8fd47924 | 3199 | /* Initializes 'wc' as a copy of 'mask'. */ |
5cb7a798 BP |
3200 | void |
3201 | minimask_expand(const struct minimask *mask, struct flow_wildcards *wc) | |
3202 | { | |
3203 | miniflow_expand(&mask->masks, &wc->masks); | |
3204 | } | |
3205 | ||
f4d335e9 JR |
3206 | /* Returns true if 'a' and 'b' are the same flow mask, false otherwise. |
3207 | * Minimasks may not have zero data values, so for the minimasks to be the | |
3208 | * same, they need to have the same map and the same data values. */ | |
5cb7a798 BP |
3209 | bool |
3210 | minimask_equal(const struct minimask *a, const struct minimask *b) | |
3211 | { | |
5fcff47b JR |
3212 | return !memcmp(a, b, sizeof *a |
3213 | + MINIFLOW_VALUES_SIZE(miniflow_n_values(&a->masks))); | |
5cb7a798 BP |
3214 | } |
3215 | ||
d4570fd8 | 3216 | /* Returns true if at least one bit matched by 'b' is wildcarded by 'a', |
5cb7a798 BP |
3217 | * false otherwise. */ |
3218 | bool | |
d4570fd8 | 3219 | minimask_has_extra(const struct minimask *a, const struct minimask *b) |
5cb7a798 | 3220 | { |
09b0fa9c | 3221 | const uint64_t *bp = miniflow_get_values(&b->masks); |
361d808d | 3222 | size_t idx; |
5cb7a798 | 3223 | |
5fcff47b | 3224 | FLOWMAP_FOR_EACH_INDEX(idx, b->masks.map) { |
d70e8c28 | 3225 | uint64_t b_u64 = *bp++; |
5cb7a798 | 3226 | |
d70e8c28 JR |
3227 | /* 'b_u64' is non-zero, check if the data in 'a' is either zero |
3228 | * or misses some of the bits in 'b_u64'. */ | |
5fcff47b JR |
3229 | if (!MINIFLOW_IN_MAP(&a->masks, idx) |
3230 | || ((*miniflow_get__(&a->masks, idx) & b_u64) != b_u64)) { | |
f4d335e9 | 3231 | return true; /* 'a' wildcards some bits 'b' doesn't. */ |
5cb7a798 BP |
3232 | } |
3233 | } | |
3234 | ||
3235 | return false; | |
3236 | } | |
f0fb825a EG |
3237 | |
3238 | void | |
3239 | flow_limit_vlans(int vlan_limit) | |
3240 | { | |
3241 | if (vlan_limit <= 0) { | |
3242 | flow_vlan_limit = FLOW_MAX_VLAN_HEADERS; | |
3243 | } else { | |
3244 | flow_vlan_limit = MIN(vlan_limit, FLOW_MAX_VLAN_HEADERS); | |
3245 | } | |
3246 | } |