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064af421 | 1 | /* |
2ed65055 | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2017, 2019 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> |
738c785f | 22 | #include <net/if.h> |
064af421 | 23 | #include <netinet/in.h> |
d31f1109 JP |
24 | #include <netinet/icmp6.h> |
25 | #include <netinet/ip6.h> | |
5cb7a798 | 26 | #include <stdint.h> |
064af421 BP |
27 | #include <stdlib.h> |
28 | #include <string.h> | |
10a24935 | 29 | #include "byte-order.h" |
0deec6d2 | 30 | #include "colors.h" |
064af421 | 31 | #include "coverage.h" |
dc5a7ce7 | 32 | #include "csum.h" |
3e8a2ad1 | 33 | #include "openvswitch/dynamic-string.h" |
064af421 | 34 | #include "hash.h" |
c49d1dd1 | 35 | #include "jhash.h" |
e29747e4 | 36 | #include "openvswitch/match.h" |
cf62fa4c | 37 | #include "dp-packet.h" |
064af421 | 38 | #include "openflow/openflow.h" |
064af421 | 39 | #include "packets.h" |
b5e7e61a | 40 | #include "odp-util.h" |
94639963 | 41 | #include "random.h" |
176aaa65 | 42 | #include "unaligned.h" |
ee89ea7b | 43 | #include "util.h" |
3d2fbd70 | 44 | #include "openvswitch/nsh.h" |
738c785f SB |
45 | #include "ovs-router.h" |
46 | #include "lib/netdev-provider.h" | |
064af421 | 47 | |
d76f09ea | 48 | COVERAGE_DEFINE(flow_extract); |
5cb7a798 | 49 | COVERAGE_DEFINE(miniflow_malloc); |
d76f09ea | 50 | |
d70e8c28 JR |
51 | /* U64 indices for segmented flow classification. */ |
52 | const uint8_t flow_segment_u64s[4] = { | |
53 | FLOW_SEGMENT_1_ENDS_AT / sizeof(uint64_t), | |
54 | FLOW_SEGMENT_2_ENDS_AT / sizeof(uint64_t), | |
55 | FLOW_SEGMENT_3_ENDS_AT / sizeof(uint64_t), | |
56 | FLOW_U64S | |
476f36e8 JR |
57 | }; |
58 | ||
f0fb825a EG |
59 | int flow_vlan_limit = FLOW_MAX_VLAN_HEADERS; |
60 | ||
268eca11 BP |
61 | /* Asserts that field 'f1' follows immediately after 'f0' in struct flow, |
62 | * without any intervening padding. */ | |
63 | #define ASSERT_SEQUENTIAL(f0, f1) \ | |
64 | BUILD_ASSERT_DECL(offsetof(struct flow, f0) \ | |
65 | + MEMBER_SIZEOF(struct flow, f0) \ | |
66 | == offsetof(struct flow, f1)) | |
67 | ||
68 | /* Asserts that fields 'f0' and 'f1' are in the same 32-bit aligned word within | |
69 | * struct flow. */ | |
70 | #define ASSERT_SAME_WORD(f0, f1) \ | |
71 | BUILD_ASSERT_DECL(offsetof(struct flow, f0) / 4 \ | |
72 | == offsetof(struct flow, f1) / 4) | |
73 | ||
74 | /* Asserts that 'f0' and 'f1' are both sequential and within the same 32-bit | |
75 | * aligned word in struct flow. */ | |
76 | #define ASSERT_SEQUENTIAL_SAME_WORD(f0, f1) \ | |
77 | ASSERT_SEQUENTIAL(f0, f1); \ | |
78 | ASSERT_SAME_WORD(f0, f1) | |
79 | ||
419681da JR |
80 | /* miniflow_extract() assumes the following to be true to optimize the |
81 | * extraction process. */ | |
268eca11 BP |
82 | ASSERT_SEQUENTIAL_SAME_WORD(nw_frag, nw_tos); |
83 | ASSERT_SEQUENTIAL_SAME_WORD(nw_tos, nw_ttl); | |
84 | ASSERT_SEQUENTIAL_SAME_WORD(nw_ttl, nw_proto); | |
419681da | 85 | |
d70e8c28 JR |
86 | /* TCP flags in the middle of a BE64, zeroes in the other half. */ |
87 | BUILD_ASSERT_DECL(offsetof(struct flow, tcp_flags) % 8 == 4); | |
88 | ||
419681da JR |
89 | #if WORDS_BIGENDIAN |
90 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl) \ | |
91 | << 16) | |
92 | #else | |
93 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl)) | |
94 | #endif | |
95 | ||
268eca11 | 96 | ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst); |
419681da JR |
97 | |
98 | /* Removes 'size' bytes from the head end of '*datap', of size '*sizep', which | |
99 | * must contain at least 'size' bytes of data. Returns the first byte of data | |
100 | * removed. */ | |
101 | static inline const void * | |
4c0e587c | 102 | data_pull(const void **datap, size_t *sizep, size_t size) |
a26ef517 | 103 | { |
4c0e587c | 104 | const char *data = *datap; |
419681da JR |
105 | *datap = data + size; |
106 | *sizep -= size; | |
107 | return data; | |
a26ef517 JP |
108 | } |
109 | ||
419681da JR |
110 | /* If '*datap' has at least 'size' bytes of data, removes that many bytes from |
111 | * the head end of '*datap' and returns the first byte removed. Otherwise, | |
112 | * returns a null pointer without modifying '*datap'. */ | |
113 | static inline const void * | |
4c0e587c | 114 | data_try_pull(const void **datap, size_t *sizep, size_t size) |
064af421 | 115 | { |
419681da | 116 | return OVS_LIKELY(*sizep >= size) ? data_pull(datap, sizep, size) : NULL; |
064af421 BP |
117 | } |
118 | ||
419681da JR |
119 | /* Context for pushing data to a miniflow. */ |
120 | struct mf_ctx { | |
5fcff47b | 121 | struct flowmap map; |
d70e8c28 JR |
122 | uint64_t *data; |
123 | uint64_t * const end; | |
419681da | 124 | }; |
064af421 | 125 | |
419681da JR |
126 | /* miniflow_push_* macros allow filling in a miniflow data values in order. |
127 | * Assertions are needed only when the layout of the struct flow is modified. | |
128 | * 'ofs' is a compile-time constant, which allows most of the code be optimized | |
694ffecc | 129 | * away. Some GCC versions gave warnings on ALWAYS_INLINE, so these are |
419681da JR |
130 | * defined as macros. */ |
131 | ||
7dc18ae9 | 132 | #if (FLOW_WC_SEQ != 41) |
419681da | 133 | #define MINIFLOW_ASSERT(X) ovs_assert(X) |
dce96af8 DDP |
134 | BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime " |
135 | "assertions enabled. Consider updating FLOW_WC_SEQ after " | |
136 | "testing") | |
419681da JR |
137 | #else |
138 | #define MINIFLOW_ASSERT(X) | |
139 | #endif | |
140 | ||
5fcff47b JR |
141 | /* True if 'IDX' and higher bits are not set. */ |
142 | #define ASSERT_FLOWMAP_NOT_SET(FM, IDX) \ | |
c2581ccf | 143 | { \ |
5fcff47b | 144 | MINIFLOW_ASSERT(!((FM)->bits[(IDX) / MAP_T_BITS] & \ |
e807a1a6 | 145 | (MAP_MAX << ((IDX) % MAP_T_BITS)))); \ |
5fcff47b JR |
146 | for (size_t i = (IDX) / MAP_T_BITS + 1; i < FLOWMAP_UNITS; i++) { \ |
147 | MINIFLOW_ASSERT(!(FM)->bits[i]); \ | |
c2581ccf JR |
148 | } \ |
149 | } | |
361d808d | 150 | |
5fcff47b JR |
151 | #define miniflow_set_map(MF, OFS) \ |
152 | { \ | |
153 | ASSERT_FLOWMAP_NOT_SET(&MF.map, (OFS)); \ | |
154 | flowmap_set(&MF.map, (OFS), 1); \ | |
c2581ccf | 155 | } |
361d808d | 156 | |
e807a1a6 SH |
157 | #define miniflow_assert_in_map(MF, OFS) \ |
158 | MINIFLOW_ASSERT(flowmap_is_set(&MF.map, (OFS))); \ | |
5fcff47b JR |
159 | ASSERT_FLOWMAP_NOT_SET(&MF.map, (OFS) + 1) |
160 | ||
161 | #define miniflow_push_uint64_(MF, OFS, VALUE) \ | |
162 | { \ | |
163 | MINIFLOW_ASSERT(MF.data < MF.end && (OFS) % 8 == 0); \ | |
164 | *MF.data++ = VALUE; \ | |
165 | miniflow_set_map(MF, OFS / 8); \ | |
d31f1109 JP |
166 | } |
167 | ||
5fcff47b | 168 | #define miniflow_push_be64_(MF, OFS, VALUE) \ |
d70e8c28 | 169 | miniflow_push_uint64_(MF, OFS, (OVS_FORCE uint64_t)(VALUE)) |
419681da | 170 | |
5fcff47b JR |
171 | #define miniflow_push_uint32_(MF, OFS, VALUE) \ |
172 | { \ | |
173 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
174 | \ | |
175 | if ((OFS) % 8 == 0) { \ | |
176 | miniflow_set_map(MF, OFS / 8); \ | |
177 | *(uint32_t *)MF.data = VALUE; \ | |
178 | } else if ((OFS) % 8 == 4) { \ | |
179 | miniflow_assert_in_map(MF, OFS / 8); \ | |
180 | *((uint32_t *)MF.data + 1) = VALUE; \ | |
181 | MF.data++; \ | |
182 | } \ | |
d70e8c28 JR |
183 | } |
184 | ||
185 | #define miniflow_push_be32_(MF, OFS, VALUE) \ | |
186 | miniflow_push_uint32_(MF, OFS, (OVS_FORCE uint32_t)(VALUE)) | |
187 | ||
5fcff47b JR |
188 | #define miniflow_push_uint16_(MF, OFS, VALUE) \ |
189 | { \ | |
190 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
191 | \ | |
192 | if ((OFS) % 8 == 0) { \ | |
193 | miniflow_set_map(MF, OFS / 8); \ | |
194 | *(uint16_t *)MF.data = VALUE; \ | |
195 | } else if ((OFS) % 8 == 2) { \ | |
196 | miniflow_assert_in_map(MF, OFS / 8); \ | |
197 | *((uint16_t *)MF.data + 1) = VALUE; \ | |
198 | } else if ((OFS) % 8 == 4) { \ | |
199 | miniflow_assert_in_map(MF, OFS / 8); \ | |
200 | *((uint16_t *)MF.data + 2) = VALUE; \ | |
201 | } else if ((OFS) % 8 == 6) { \ | |
202 | miniflow_assert_in_map(MF, OFS / 8); \ | |
203 | *((uint16_t *)MF.data + 3) = VALUE; \ | |
204 | MF.data++; \ | |
205 | } \ | |
206 | } | |
207 | ||
1dcf9ac7 SH |
208 | #define miniflow_push_uint8_(MF, OFS, VALUE) \ |
209 | { \ | |
210 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
211 | \ | |
212 | if ((OFS) % 8 == 0) { \ | |
213 | miniflow_set_map(MF, OFS / 8); \ | |
214 | *(uint8_t *)MF.data = VALUE; \ | |
215 | } else if ((OFS) % 8 == 7) { \ | |
216 | miniflow_assert_in_map(MF, OFS / 8); \ | |
217 | *((uint8_t *)MF.data + 7) = VALUE; \ | |
218 | MF.data++; \ | |
219 | } else { \ | |
220 | miniflow_assert_in_map(MF, OFS / 8); \ | |
221 | *((uint8_t *)MF.data + ((OFS) % 8)) = VALUE; \ | |
222 | } \ | |
223 | } | |
224 | ||
5fcff47b JR |
225 | #define miniflow_pad_to_64_(MF, OFS) \ |
226 | { \ | |
227 | MINIFLOW_ASSERT((OFS) % 8 != 0); \ | |
228 | miniflow_assert_in_map(MF, OFS / 8); \ | |
229 | \ | |
230 | memset((uint8_t *)MF.data + (OFS) % 8, 0, 8 - (OFS) % 8); \ | |
231 | MF.data++; \ | |
d70e8c28 JR |
232 | } |
233 | ||
1589ee5a SH |
234 | #define miniflow_pad_from_64_(MF, OFS) \ |
235 | { \ | |
236 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
237 | \ | |
238 | MINIFLOW_ASSERT((OFS) % 8 != 0); \ | |
239 | miniflow_set_map(MF, OFS / 8); \ | |
240 | \ | |
241 | memset((uint8_t *)MF.data, 0, (OFS) % 8); \ | |
242 | } | |
243 | ||
d70e8c28 | 244 | #define miniflow_push_be16_(MF, OFS, VALUE) \ |
419681da JR |
245 | miniflow_push_uint16_(MF, OFS, (OVS_FORCE uint16_t)VALUE); |
246 | ||
1dcf9ac7 SH |
247 | #define miniflow_push_be8_(MF, OFS, VALUE) \ |
248 | miniflow_push_uint8_(MF, OFS, (OVS_FORCE uint8_t)VALUE); | |
249 | ||
5fcff47b JR |
250 | #define miniflow_set_maps(MF, OFS, N_WORDS) \ |
251 | { \ | |
252 | size_t ofs = (OFS); \ | |
253 | size_t n_words = (N_WORDS); \ | |
254 | \ | |
255 | MINIFLOW_ASSERT(n_words && MF.data + n_words <= MF.end); \ | |
256 | ASSERT_FLOWMAP_NOT_SET(&MF.map, ofs); \ | |
257 | flowmap_set(&MF.map, ofs, n_words); \ | |
361d808d JR |
258 | } |
259 | ||
419681da JR |
260 | /* Data at 'valuep' may be unaligned. */ |
261 | #define miniflow_push_words_(MF, OFS, VALUEP, N_WORDS) \ | |
262 | { \ | |
361d808d JR |
263 | MINIFLOW_ASSERT((OFS) % 8 == 0); \ |
264 | miniflow_set_maps(MF, (OFS) / 8, (N_WORDS)); \ | |
265 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof *MF.data); \ | |
266 | MF.data += (N_WORDS); \ | |
064af421 BP |
267 | } |
268 | ||
d70e8c28 JR |
269 | /* Push 32-bit words padded to 64-bits. */ |
270 | #define miniflow_push_words_32_(MF, OFS, VALUEP, N_WORDS) \ | |
271 | { \ | |
361d808d | 272 | miniflow_set_maps(MF, (OFS) / 8, DIV_ROUND_UP(N_WORDS, 2)); \ |
d70e8c28 JR |
273 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof(uint32_t)); \ |
274 | MF.data += DIV_ROUND_UP(N_WORDS, 2); \ | |
d70e8c28 JR |
275 | if ((N_WORDS) & 1) { \ |
276 | *((uint32_t *)MF.data - 1) = 0; \ | |
277 | } \ | |
278 | } | |
50f06e16 | 279 | |
d70e8c28 JR |
280 | /* Data at 'valuep' may be unaligned. */ |
281 | /* MACs start 64-aligned, and must be followed by other data or padding. */ | |
282 | #define miniflow_push_macs_(MF, OFS, VALUEP) \ | |
283 | { \ | |
361d808d | 284 | miniflow_set_maps(MF, (OFS) / 8, 2); \ |
d70e8c28 JR |
285 | memcpy(MF.data, (VALUEP), 2 * ETH_ADDR_LEN); \ |
286 | MF.data += 1; /* First word only. */ \ | |
d70e8c28 | 287 | } |
50f06e16 | 288 | |
d70e8c28 JR |
289 | #define miniflow_push_uint32(MF, FIELD, VALUE) \ |
290 | miniflow_push_uint32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 291 | |
d70e8c28 JR |
292 | #define miniflow_push_be32(MF, FIELD, VALUE) \ |
293 | miniflow_push_be32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 294 | |
d70e8c28 | 295 | #define miniflow_push_uint16(MF, FIELD, VALUE) \ |
419681da | 296 | miniflow_push_uint16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 297 | |
d70e8c28 | 298 | #define miniflow_push_be16(MF, FIELD, VALUE) \ |
419681da | 299 | miniflow_push_be16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 300 | |
1dcf9ac7 SH |
301 | #define miniflow_push_uint8(MF, FIELD, VALUE) \ |
302 | miniflow_push_uint8_(MF, offsetof(struct flow, FIELD), VALUE) | |
303 | ||
d70e8c28 | 304 | #define miniflow_pad_to_64(MF, FIELD) \ |
06f41fc4 | 305 | miniflow_pad_to_64_(MF, OFFSETOFEND(struct flow, FIELD)) |
d70e8c28 | 306 | |
1589ee5a SH |
307 | #define miniflow_pad_from_64(MF, FIELD) \ |
308 | miniflow_pad_from_64_(MF, offsetof(struct flow, FIELD)) | |
309 | ||
419681da JR |
310 | #define miniflow_push_words(MF, FIELD, VALUEP, N_WORDS) \ |
311 | miniflow_push_words_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
064af421 | 312 | |
d70e8c28 JR |
313 | #define miniflow_push_words_32(MF, FIELD, VALUEP, N_WORDS) \ |
314 | miniflow_push_words_32_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
315 | ||
316 | #define miniflow_push_macs(MF, FIELD, VALUEP) \ | |
317 | miniflow_push_macs_(MF, offsetof(struct flow, FIELD), VALUEP) | |
318 | ||
daf4d3c1 JR |
319 | /* Return the pointer to the miniflow data when called BEFORE the corresponding |
320 | * push. */ | |
321 | #define miniflow_pointer(MF, FIELD) \ | |
322 | (void *)((uint8_t *)MF.data + ((offsetof(struct flow, FIELD)) % 8)) | |
323 | ||
419681da JR |
324 | /* Pulls the MPLS headers at '*datap' and returns the count of them. */ |
325 | static inline int | |
4c0e587c | 326 | parse_mpls(const void **datap, size_t *sizep) |
d31f1109 | 327 | { |
419681da JR |
328 | const struct mpls_hdr *mh; |
329 | int count = 0; | |
d31f1109 | 330 | |
419681da JR |
331 | while ((mh = data_try_pull(datap, sizep, sizeof *mh))) { |
332 | count++; | |
333 | if (mh->mpls_lse.lo & htons(1 << MPLS_BOS_SHIFT)) { | |
d31f1109 JP |
334 | break; |
335 | } | |
419681da | 336 | } |
ba8561c6 | 337 | return MIN(count, FLOW_MAX_MPLS_LABELS); |
419681da | 338 | } |
d31f1109 | 339 | |
f0fb825a EG |
340 | /* passed vlan_hdrs arg must be at least size FLOW_MAX_VLAN_HEADERS. */ |
341 | static inline ALWAYS_INLINE size_t | |
342 | parse_vlan(const void **datap, size_t *sizep, union flow_vlan_hdr *vlan_hdrs) | |
419681da | 343 | { |
f0fb825a | 344 | const ovs_be16 *eth_type; |
d31f1109 | 345 | |
419681da | 346 | data_pull(datap, sizep, ETH_ADDR_LEN * 2); |
d31f1109 | 347 | |
f0fb825a EG |
348 | eth_type = *datap; |
349 | ||
350 | size_t n; | |
351 | for (n = 0; eth_type_vlan(*eth_type) && n < flow_vlan_limit; n++) { | |
352 | if (OVS_UNLIKELY(*sizep < sizeof(ovs_be32) + sizeof(ovs_be16))) { | |
353 | break; | |
d31f1109 | 354 | } |
f0fb825a | 355 | |
f1dbe379 | 356 | memset(vlan_hdrs + n, 0, sizeof(union flow_vlan_hdr)); |
f0fb825a EG |
357 | const ovs_16aligned_be32 *qp = data_pull(datap, sizep, sizeof *qp); |
358 | vlan_hdrs[n].qtag = get_16aligned_be32(qp); | |
359 | vlan_hdrs[n].tci |= htons(VLAN_CFI); | |
360 | eth_type = *datap; | |
d31f1109 | 361 | } |
f0fb825a | 362 | return n; |
d31f1109 JP |
363 | } |
364 | ||
206b60d4 | 365 | static inline ALWAYS_INLINE ovs_be16 |
4c0e587c | 366 | parse_ethertype(const void **datap, size_t *sizep) |
88366484 | 367 | { |
419681da JR |
368 | const struct llc_snap_header *llc; |
369 | ovs_be16 proto; | |
5a51b2cd | 370 | |
419681da JR |
371 | proto = *(ovs_be16 *) data_pull(datap, sizep, sizeof proto); |
372 | if (OVS_LIKELY(ntohs(proto) >= ETH_TYPE_MIN)) { | |
373 | return proto; | |
88366484 | 374 | } |
5a51b2cd | 375 | |
419681da JR |
376 | if (OVS_UNLIKELY(*sizep < sizeof *llc)) { |
377 | return htons(FLOW_DL_TYPE_NONE); | |
88366484 | 378 | } |
5a51b2cd | 379 | |
419681da JR |
380 | llc = *datap; |
381 | if (OVS_UNLIKELY(llc->llc.llc_dsap != LLC_DSAP_SNAP | |
382 | || llc->llc.llc_ssap != LLC_SSAP_SNAP | |
383 | || llc->llc.llc_cntl != LLC_CNTL_SNAP | |
384 | || memcmp(llc->snap.snap_org, SNAP_ORG_ETHERNET, | |
385 | sizeof llc->snap.snap_org))) { | |
386 | return htons(FLOW_DL_TYPE_NONE); | |
c6bcb685 | 387 | } |
c6bcb685 | 388 | |
419681da | 389 | data_pull(datap, sizep, sizeof *llc); |
685a51a5 | 390 | |
419681da JR |
391 | if (OVS_LIKELY(ntohs(llc->snap.snap_type) >= ETH_TYPE_MIN)) { |
392 | return llc->snap.snap_type; | |
685a51a5 JP |
393 | } |
394 | ||
419681da JR |
395 | return htons(FLOW_DL_TYPE_NONE); |
396 | } | |
685a51a5 | 397 | |
daf4d3c1 | 398 | /* Returns 'true' if the packet is an ND packet. In that case the '*nd_target' |
9b2b8497 VDA |
399 | * and 'arp_buf[]' are filled in. If the packet is not an ND packet, 'false' |
400 | * is returned and no values are filled in on '*nd_target' or 'arp_buf[]'. */ | |
daf4d3c1 | 401 | static inline bool |
361a47d6 IM |
402 | parse_icmpv6(const void **datap, size_t *sizep, |
403 | const struct icmp6_data_header *icmp6, | |
404 | ovs_be32 *rso_flags, const struct in6_addr **nd_target, | |
9b2b8497 | 405 | struct eth_addr arp_buf[2], uint8_t *opt_type) |
419681da | 406 | { |
361a47d6 IM |
407 | if (icmp6->icmp6_base.icmp6_code != 0 || |
408 | (icmp6->icmp6_base.icmp6_type != ND_NEIGHBOR_SOLICIT && | |
409 | icmp6->icmp6_base.icmp6_type != ND_NEIGHBOR_ADVERT)) { | |
daf4d3c1 JR |
410 | return false; |
411 | } | |
685a51a5 | 412 | |
daf4d3c1 JR |
413 | arp_buf[0] = eth_addr_zero; |
414 | arp_buf[1] = eth_addr_zero; | |
9b2b8497 VDA |
415 | *opt_type = 0; |
416 | ||
361a47d6 | 417 | *rso_flags = get_16aligned_be32(icmp6->icmp6_data.be32); |
9b2b8497 | 418 | |
daf4d3c1 JR |
419 | *nd_target = data_try_pull(datap, sizep, sizeof **nd_target); |
420 | if (OVS_UNLIKELY(!*nd_target)) { | |
421 | return true; | |
422 | } | |
685a51a5 | 423 | |
daf4d3c1 JR |
424 | while (*sizep >= 8) { |
425 | /* The minimum size of an option is 8 bytes, which also is | |
426 | * the size of Ethernet link-layer options. */ | |
86d46f3c ZKL |
427 | const struct ovs_nd_lla_opt *lla_opt = *datap; |
428 | int opt_len = lla_opt->len * ND_LLA_OPT_LEN; | |
88366484 | 429 | |
daf4d3c1 JR |
430 | if (!opt_len || opt_len > *sizep) { |
431 | return true; | |
432 | } | |
685a51a5 | 433 | |
daf4d3c1 JR |
434 | /* Store the link layer address if the appropriate option is |
435 | * provided. It is considered an error if the same link | |
436 | * layer option is specified twice. */ | |
86d46f3c | 437 | if (lla_opt->type == ND_OPT_SOURCE_LINKADDR && opt_len == 8) { |
daf4d3c1 | 438 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[0]))) { |
86d46f3c | 439 | arp_buf[0] = lla_opt->mac; |
9b2b8497 VDA |
440 | /* We use only first option type present in ND packet. */ |
441 | if (*opt_type == 0) { | |
442 | *opt_type = lla_opt->type; | |
443 | } | |
daf4d3c1 JR |
444 | } else { |
445 | goto invalid; | |
685a51a5 | 446 | } |
86d46f3c | 447 | } else if (lla_opt->type == ND_OPT_TARGET_LINKADDR && opt_len == 8) { |
daf4d3c1 | 448 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[1]))) { |
86d46f3c | 449 | arp_buf[1] = lla_opt->mac; |
9b2b8497 VDA |
450 | /* We use only first option type present in ND packet. */ |
451 | if (*opt_type == 0) { | |
452 | *opt_type = lla_opt->type; | |
453 | } | |
daf4d3c1 JR |
454 | } else { |
455 | goto invalid; | |
685a51a5 | 456 | } |
685a51a5 | 457 | } |
685a51a5 | 458 | |
daf4d3c1 JR |
459 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, opt_len))) { |
460 | return true; | |
461 | } | |
462 | } | |
463 | return true; | |
685a51a5 JP |
464 | |
465 | invalid: | |
cc5dba2f | 466 | *nd_target = NULL; |
74ff3298 JR |
467 | arp_buf[0] = eth_addr_zero; |
468 | arp_buf[1] = eth_addr_zero; | |
daf4d3c1 | 469 | return true; |
685a51a5 JP |
470 | } |
471 | ||
94a81e40 DDP |
472 | static inline bool |
473 | parse_ipv6_ext_hdrs__(const void **datap, size_t *sizep, uint8_t *nw_proto, | |
523464ab DB |
474 | uint8_t *nw_frag, |
475 | const struct ovs_16aligned_ip6_frag **frag_hdr) | |
94a81e40 | 476 | { |
523464ab | 477 | *frag_hdr = NULL; |
94a81e40 DDP |
478 | while (1) { |
479 | if (OVS_LIKELY((*nw_proto != IPPROTO_HOPOPTS) | |
480 | && (*nw_proto != IPPROTO_ROUTING) | |
481 | && (*nw_proto != IPPROTO_DSTOPTS) | |
482 | && (*nw_proto != IPPROTO_AH) | |
483 | && (*nw_proto != IPPROTO_FRAGMENT))) { | |
484 | /* It's either a terminal header (e.g., TCP, UDP) or one we | |
485 | * don't understand. In either case, we're done with the | |
486 | * packet, so use it to fill in 'nw_proto'. */ | |
487 | return true; | |
488 | } | |
489 | ||
490 | /* We only verify that at least 8 bytes of the next header are | |
491 | * available, but many of these headers are longer. Ensure that | |
492 | * accesses within the extension header are within those first 8 | |
493 | * bytes. All extension headers are required to be at least 8 | |
494 | * bytes. */ | |
495 | if (OVS_UNLIKELY(*sizep < 8)) { | |
496 | return false; | |
497 | } | |
498 | ||
499 | if ((*nw_proto == IPPROTO_HOPOPTS) | |
500 | || (*nw_proto == IPPROTO_ROUTING) | |
501 | || (*nw_proto == IPPROTO_DSTOPTS)) { | |
502 | /* These headers, while different, have the fields we care | |
503 | * about in the same location and with the same | |
504 | * interpretation. */ | |
505 | const struct ip6_ext *ext_hdr = *datap; | |
506 | *nw_proto = ext_hdr->ip6e_nxt; | |
507 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, | |
508 | (ext_hdr->ip6e_len + 1) * 8))) { | |
509 | return false; | |
510 | } | |
511 | } else if (*nw_proto == IPPROTO_AH) { | |
512 | /* A standard AH definition isn't available, but the fields | |
513 | * we care about are in the same location as the generic | |
514 | * option header--only the header length is calculated | |
515 | * differently. */ | |
516 | const struct ip6_ext *ext_hdr = *datap; | |
517 | *nw_proto = ext_hdr->ip6e_nxt; | |
518 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, | |
519 | (ext_hdr->ip6e_len + 2) * 4))) { | |
520 | return false; | |
521 | } | |
522 | } else if (*nw_proto == IPPROTO_FRAGMENT) { | |
523464ab | 523 | *frag_hdr = *datap; |
94a81e40 | 524 | |
523464ab DB |
525 | *nw_proto = (*frag_hdr)->ip6f_nxt; |
526 | if (!data_try_pull(datap, sizep, sizeof **frag_hdr)) { | |
94a81e40 DDP |
527 | return false; |
528 | } | |
529 | ||
530 | /* We only process the first fragment. */ | |
523464ab | 531 | if ((*frag_hdr)->ip6f_offlg != htons(0)) { |
94a81e40 | 532 | *nw_frag = FLOW_NW_FRAG_ANY; |
523464ab | 533 | if (((*frag_hdr)->ip6f_offlg & IP6F_OFF_MASK) != htons(0)) { |
94a81e40 DDP |
534 | *nw_frag |= FLOW_NW_FRAG_LATER; |
535 | *nw_proto = IPPROTO_FRAGMENT; | |
536 | return true; | |
537 | } | |
538 | } | |
539 | } | |
540 | } | |
541 | } | |
542 | ||
523464ab DB |
543 | /* Parses IPv6 extension headers until a terminal header (or header we |
544 | * don't understand) is found. 'datap' points to the first extension | |
545 | * header and advances as parsing occurs; 'sizep' is the remaining size | |
546 | * and is decreased accordingly. 'nw_proto' starts as the first | |
547 | * extension header to process and is updated as the extension headers | |
548 | * are parsed. | |
549 | * | |
550 | * If a fragment header is found, '*frag_hdr' is set to the fragment | |
551 | * header and otherwise set to NULL. If it is the first fragment, | |
552 | * extension header parsing otherwise continues as usual. If it's not | |
553 | * the first fragment, 'nw_proto' is set to IPPROTO_FRAGMENT and 'nw_frag' | |
554 | * has FLOW_NW_FRAG_LATER set. Both first and later fragments have | |
555 | * FLOW_NW_FRAG_ANY set in 'nw_frag'. | |
556 | * | |
557 | * A return value of false indicates that there was a problem parsing | |
558 | * the extension headers.*/ | |
94a81e40 DDP |
559 | bool |
560 | parse_ipv6_ext_hdrs(const void **datap, size_t *sizep, uint8_t *nw_proto, | |
523464ab DB |
561 | uint8_t *nw_frag, |
562 | const struct ovs_16aligned_ip6_frag **frag_hdr) | |
94a81e40 | 563 | { |
523464ab DB |
564 | return parse_ipv6_ext_hdrs__(datap, sizep, nw_proto, nw_frag, |
565 | frag_hdr); | |
94a81e40 DDP |
566 | } |
567 | ||
3d2fbd70 | 568 | bool |
17553f27 | 569 | parse_nsh(const void **datap, size_t *sizep, struct ovs_key_nsh *key) |
3d2fbd70 JS |
570 | { |
571 | const struct nsh_hdr *nsh = (const struct nsh_hdr *) *datap; | |
17553f27 | 572 | uint8_t version, length, flags, ttl; |
3d2fbd70 JS |
573 | |
574 | /* Check if it is long enough for NSH header, doesn't support | |
575 | * MD type 2 yet | |
576 | */ | |
7edef47b | 577 | if (OVS_UNLIKELY(*sizep < NSH_BASE_HDR_LEN)) { |
3d2fbd70 JS |
578 | return false; |
579 | } | |
580 | ||
f59cb331 YY |
581 | version = nsh_get_ver(nsh); |
582 | flags = nsh_get_flags(nsh); | |
583 | length = nsh_hdr_len(nsh); | |
17553f27 | 584 | ttl = nsh_get_ttl(nsh); |
3d2fbd70 | 585 | |
f59cb331 | 586 | if (OVS_UNLIKELY(length > *sizep || version != 0)) { |
3d2fbd70 JS |
587 | return false; |
588 | } | |
589 | ||
3d2fbd70 | 590 | key->flags = flags; |
17553f27 | 591 | key->ttl = ttl; |
3d2fbd70 JS |
592 | key->mdtype = nsh->md_type; |
593 | key->np = nsh->next_proto; | |
17553f27 | 594 | key->path_hdr = nsh_get_path_hdr(nsh); |
3d2fbd70 JS |
595 | |
596 | switch (key->mdtype) { | |
597 | case NSH_M_TYPE1: | |
7edef47b JS |
598 | if (length != NSH_M_TYPE1_LEN) { |
599 | return false; | |
600 | } | |
3d2fbd70 | 601 | for (size_t i = 0; i < 4; i++) { |
f59cb331 | 602 | key->context[i] = get_16aligned_be32(&nsh->md1.context[i]); |
3d2fbd70 JS |
603 | } |
604 | break; | |
605 | case NSH_M_TYPE2: | |
f59cb331 YY |
606 | /* Don't support MD type 2 metedata parsing yet */ |
607 | if (length < NSH_BASE_HDR_LEN) { | |
608 | return false; | |
609 | } | |
610 | ||
611 | memset(key->context, 0, sizeof(key->context)); | |
612 | break; | |
3d2fbd70 | 613 | default: |
7edef47b | 614 | /* We don't parse other context headers yet. */ |
41179399 | 615 | memset(key->context, 0, sizeof(key->context)); |
7edef47b | 616 | break; |
3d2fbd70 JS |
617 | } |
618 | ||
619 | data_pull(datap, sizep, length); | |
620 | ||
621 | return true; | |
622 | } | |
623 | ||
005bb872 BP |
624 | /* This does the same thing as miniflow_extract() with a full-size 'flow' as |
625 | * the destination. */ | |
7257b535 | 626 | void |
cf62fa4c | 627 | flow_extract(struct dp_packet *packet, struct flow *flow) |
064af421 | 628 | { |
27bbe15d JR |
629 | struct { |
630 | struct miniflow mf; | |
d70e8c28 | 631 | uint64_t buf[FLOW_U64S]; |
27bbe15d | 632 | } m; |
064af421 BP |
633 | |
634 | COVERAGE_INC(flow_extract); | |
635 | ||
cf62fa4c | 636 | miniflow_extract(packet, &m.mf); |
27bbe15d | 637 | miniflow_expand(&m.mf, flow); |
419681da | 638 | } |
296e07ac | 639 | |
62b0859d YL |
640 | static inline bool |
641 | ipv4_sanity_check(const struct ip_header *nh, size_t size, | |
642 | int *ip_lenp, uint16_t *tot_lenp) | |
643 | { | |
644 | int ip_len; | |
645 | uint16_t tot_len; | |
646 | ||
647 | if (OVS_UNLIKELY(size < IP_HEADER_LEN)) { | |
648 | return false; | |
649 | } | |
650 | ip_len = IP_IHL(nh->ip_ihl_ver) * 4; | |
651 | ||
652 | if (OVS_UNLIKELY(ip_len < IP_HEADER_LEN || size < ip_len)) { | |
653 | return false; | |
654 | } | |
655 | ||
656 | tot_len = ntohs(nh->ip_tot_len); | |
657 | if (OVS_UNLIKELY(tot_len > size || ip_len > tot_len || | |
658 | size - tot_len > UINT8_MAX)) { | |
659 | return false; | |
660 | } | |
661 | ||
662 | *ip_lenp = ip_len; | |
663 | *tot_lenp = tot_len; | |
664 | ||
665 | return true; | |
666 | } | |
667 | ||
668 | static inline uint8_t | |
669 | ipv4_get_nw_frag(const struct ip_header *nh) | |
670 | { | |
671 | uint8_t nw_frag = 0; | |
672 | ||
673 | if (OVS_UNLIKELY(IP_IS_FRAGMENT(nh->ip_frag_off))) { | |
674 | nw_frag = FLOW_NW_FRAG_ANY; | |
675 | if (nh->ip_frag_off & htons(IP_FRAG_OFF_MASK)) { | |
676 | nw_frag |= FLOW_NW_FRAG_LATER; | |
677 | } | |
678 | } | |
679 | ||
680 | return nw_frag; | |
681 | } | |
682 | ||
683 | static inline bool | |
684 | ipv6_sanity_check(const struct ovs_16aligned_ip6_hdr *nh, size_t size) | |
685 | { | |
686 | uint16_t plen; | |
687 | ||
688 | if (OVS_UNLIKELY(size < sizeof *nh)) { | |
689 | return false; | |
690 | } | |
691 | ||
692 | plen = ntohs(nh->ip6_plen); | |
4fe08016 | 693 | if (OVS_UNLIKELY(plen + IPV6_HEADER_LEN > size)) { |
62b0859d YL |
694 | return false; |
695 | } | |
696 | /* Jumbo Payload option not supported yet. */ | |
892545b9 | 697 | if (OVS_UNLIKELY(size - (plen + IPV6_HEADER_LEN) > UINT8_MAX)) { |
62b0859d YL |
698 | return false; |
699 | } | |
700 | ||
701 | return true; | |
702 | } | |
703 | ||
005bb872 BP |
704 | /* Initializes 'dst' from 'packet' and 'md', taking the packet type into |
705 | * account. 'dst' must have enough space for FLOW_U64S * 8 bytes. | |
706 | * | |
707 | * Initializes the layer offsets as follows: | |
708 | * | |
709 | * - packet->l2_5_ofs to the | |
710 | * * the start of the MPLS shim header. Can be zero, if the | |
711 | * packet is of type (OFPHTN_ETHERTYPE, ETH_TYPE_MPLS). | |
712 | * * UINT16_MAX when there is no MPLS shim header. | |
713 | * | |
714 | * - packet->l3_ofs is set to | |
715 | * * zero if the packet_type is in name space OFPHTN_ETHERTYPE | |
716 | * and there is no MPLS shim header. | |
717 | * * just past the Ethernet header, or just past the vlan_header if | |
718 | * one is present, to the first byte of the payload of the | |
719 | * Ethernet frame if the packet type is Ethernet and there is | |
720 | * no MPLS shim header. | |
721 | * * just past the MPLS label stack to the first byte of the MPLS | |
722 | * payload if there is at least one MPLS shim header. | |
723 | * * UINT16_MAX if the packet type is Ethernet and the frame is | |
724 | * too short to contain an Ethernet header. | |
725 | * | |
726 | * - packet->l4_ofs is set to just past the IPv4 or IPv6 header, if one is | |
727 | * present and the packet has at least the content used for the fields | |
728 | * of interest for the flow, otherwise UINT16_MAX. | |
729 | */ | |
419681da | 730 | void |
cf62fa4c | 731 | miniflow_extract(struct dp_packet *packet, struct miniflow *dst) |
419681da | 732 | { |
005bb872 BP |
733 | /* Add code to this function (or its callees) to extract new fields. */ |
734 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 41); | |
735 | ||
cf62fa4c | 736 | const struct pkt_metadata *md = &packet->md; |
4c0e587c | 737 | const void *data = dp_packet_data(packet); |
cf62fa4c | 738 | size_t size = dp_packet_size(packet); |
2482b0b0 | 739 | ovs_be32 packet_type = packet->packet_type; |
09b0fa9c | 740 | uint64_t *values = miniflow_values(dst); |
5fcff47b JR |
741 | struct mf_ctx mf = { FLOWMAP_EMPTY_INITIALIZER, values, |
742 | values + FLOW_U64S }; | |
2482b0b0 JS |
743 | const char *frame; |
744 | ovs_be16 dl_type = OVS_BE16_MAX; | |
419681da | 745 | uint8_t nw_frag, nw_tos, nw_ttl, nw_proto; |
daf4d3c1 JR |
746 | uint8_t *ct_nw_proto_p = NULL; |
747 | ovs_be16 ct_tp_src = 0, ct_tp_dst = 0; | |
419681da JR |
748 | |
749 | /* Metadata. */ | |
ffe4c74f | 750 | if (flow_tnl_dst_is_set(&md->tunnel)) { |
cf62fa4c | 751 | miniflow_push_words(mf, tunnel, &md->tunnel, |
9ad11dbe JG |
752 | offsetof(struct flow_tnl, metadata) / |
753 | sizeof(uint64_t)); | |
6728d578 JG |
754 | |
755 | if (!(md->tunnel.flags & FLOW_TNL_F_UDPIF)) { | |
756 | if (md->tunnel.metadata.present.map) { | |
757 | miniflow_push_words(mf, tunnel.metadata, &md->tunnel.metadata, | |
758 | sizeof md->tunnel.metadata / | |
759 | sizeof(uint64_t)); | |
760 | } | |
761 | } else { | |
762 | if (md->tunnel.metadata.present.len) { | |
763 | miniflow_push_words(mf, tunnel.metadata.present, | |
764 | &md->tunnel.metadata.present, 1); | |
765 | miniflow_push_words(mf, tunnel.metadata.opts.gnv, | |
766 | md->tunnel.metadata.opts.gnv, | |
767 | DIV_ROUND_UP(md->tunnel.metadata.present.len, | |
768 | sizeof(uint64_t))); | |
769 | } | |
9ad11dbe | 770 | } |
cf62fa4c PS |
771 | } |
772 | if (md->skb_priority || md->pkt_mark) { | |
773 | miniflow_push_uint32(mf, skb_priority, md->skb_priority); | |
774 | miniflow_push_uint32(mf, pkt_mark, md->pkt_mark); | |
775 | } | |
776 | miniflow_push_uint32(mf, dp_hash, md->dp_hash); | |
777 | miniflow_push_uint32(mf, in_port, odp_to_u32(md->in_port.odp_port)); | |
6cf5c521 | 778 | if (md->ct_state) { |
cf62fa4c | 779 | miniflow_push_uint32(mf, recirc_id, md->recirc_id); |
2a28ccc8 | 780 | miniflow_push_uint8(mf, ct_state, md->ct_state); |
daf4d3c1 JR |
781 | ct_nw_proto_p = miniflow_pointer(mf, ct_nw_proto); |
782 | miniflow_push_uint8(mf, ct_nw_proto, 0); | |
07659514 | 783 | miniflow_push_uint16(mf, ct_zone, md->ct_zone); |
8e53fe8c | 784 | miniflow_push_uint32(mf, ct_mark, md->ct_mark); |
2482b0b0 | 785 | miniflow_push_be32(mf, packet_type, packet_type); |
2ff8484b | 786 | if (!ovs_u128_is_zero(md->ct_label)) { |
9daf2348 JS |
787 | miniflow_push_words(mf, ct_label, &md->ct_label, |
788 | sizeof md->ct_label / sizeof(uint64_t)); | |
789 | } | |
2482b0b0 | 790 | } else { |
c2c19ddd MG |
791 | if (md->recirc_id) { |
792 | miniflow_push_uint32(mf, recirc_id, md->recirc_id); | |
793 | miniflow_pad_to_64(mf, recirc_id); | |
794 | } | |
2482b0b0 JS |
795 | miniflow_pad_from_64(mf, packet_type); |
796 | miniflow_push_be32(mf, packet_type, packet_type); | |
8e53fe8c JS |
797 | } |
798 | ||
419681da | 799 | /* Initialize packet's layer pointer and offsets. */ |
2482b0b0 | 800 | frame = data; |
82eb5b0a | 801 | dp_packet_reset_offsets(packet); |
064af421 | 802 | |
2482b0b0 JS |
803 | if (packet_type == htonl(PT_ETH)) { |
804 | /* Must have full Ethernet header to proceed. */ | |
805 | if (OVS_UNLIKELY(size < sizeof(struct eth_header))) { | |
806 | goto out; | |
807 | } else { | |
808 | /* Link layer. */ | |
809 | ASSERT_SEQUENTIAL(dl_dst, dl_src); | |
810 | miniflow_push_macs(mf, dl_dst, data); | |
811 | ||
812 | /* VLAN */ | |
813 | union flow_vlan_hdr vlans[FLOW_MAX_VLAN_HEADERS]; | |
814 | size_t num_vlans = parse_vlan(&data, &size, vlans); | |
815 | ||
816 | dl_type = parse_ethertype(&data, &size); | |
817 | miniflow_push_be16(mf, dl_type, dl_type); | |
818 | miniflow_pad_to_64(mf, dl_type); | |
819 | if (num_vlans > 0) { | |
820 | miniflow_push_words_32(mf, vlans, vlans, num_vlans); | |
821 | } | |
f0fb825a | 822 | |
2482b0b0 JS |
823 | } |
824 | } else { | |
825 | /* Take dl_type from packet_type. */ | |
826 | dl_type = pt_ns_type_be(packet_type); | |
827 | miniflow_pad_from_64(mf, dl_type); | |
419681da | 828 | miniflow_push_be16(mf, dl_type, dl_type); |
2482b0b0 | 829 | /* Do not push vlan_tci, pad instead */ |
f0fb825a | 830 | miniflow_pad_to_64(mf, dl_type); |
50f06e16 | 831 | } |
50f06e16 | 832 | |
419681da JR |
833 | /* Parse mpls. */ |
834 | if (OVS_UNLIKELY(eth_type_mpls(dl_type))) { | |
835 | int count; | |
836 | const void *mpls = data; | |
837 | ||
2482b0b0 | 838 | packet->l2_5_ofs = (char *)data - frame; |
419681da | 839 | count = parse_mpls(&data, &size); |
d70e8c28 | 840 | miniflow_push_words_32(mf, mpls_lse, mpls, count); |
b02475c5 SH |
841 | } |
842 | ||
ad128cc1 | 843 | /* Network layer. */ |
2482b0b0 | 844 | packet->l3_ofs = (char *)data - frame; |
419681da JR |
845 | |
846 | nw_frag = 0; | |
847 | if (OVS_LIKELY(dl_type == htons(ETH_TYPE_IP))) { | |
848 | const struct ip_header *nh = data; | |
849 | int ip_len; | |
fa8d9001 | 850 | uint16_t tot_len; |
419681da | 851 | |
62b0859d | 852 | if (OVS_UNLIKELY(!ipv4_sanity_check(nh, size, &ip_len, &tot_len))) { |
fa8d9001 JR |
853 | goto out; |
854 | } | |
cf62fa4c | 855 | dp_packet_set_l2_pad_size(packet, size - tot_len); |
fa8d9001 | 856 | size = tot_len; /* Never pull padding. */ |
419681da JR |
857 | |
858 | /* Push both source and destination address at once. */ | |
d70e8c28 | 859 | miniflow_push_words(mf, nw_src, &nh->ip_src, 1); |
daf4d3c1 JR |
860 | if (ct_nw_proto_p && !md->ct_orig_tuple_ipv6) { |
861 | *ct_nw_proto_p = md->ct_orig_tuple.ipv4.ipv4_proto; | |
862 | if (*ct_nw_proto_p) { | |
863 | miniflow_push_words(mf, ct_nw_src, | |
864 | &md->ct_orig_tuple.ipv4.ipv4_src, 1); | |
865 | ct_tp_src = md->ct_orig_tuple.ipv4.src_port; | |
866 | ct_tp_dst = md->ct_orig_tuple.ipv4.dst_port; | |
867 | } | |
868 | } | |
d70e8c28 JR |
869 | |
870 | miniflow_push_be32(mf, ipv6_label, 0); /* Padding for IPv4. */ | |
419681da JR |
871 | |
872 | nw_tos = nh->ip_tos; | |
873 | nw_ttl = nh->ip_ttl; | |
874 | nw_proto = nh->ip_proto; | |
62b0859d | 875 | nw_frag = ipv4_get_nw_frag(nh); |
419681da | 876 | data_pull(&data, &size, ip_len); |
419681da | 877 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { |
62b0859d | 878 | const struct ovs_16aligned_ip6_hdr *nh = data; |
419681da | 879 | ovs_be32 tc_flow; |
fa8d9001 | 880 | uint16_t plen; |
419681da | 881 | |
62b0859d | 882 | if (OVS_UNLIKELY(!ipv6_sanity_check(nh, size))) { |
419681da JR |
883 | goto out; |
884 | } | |
62b0859d | 885 | data_pull(&data, &size, sizeof *nh); |
419681da | 886 | |
fa8d9001 | 887 | plen = ntohs(nh->ip6_plen); |
cf62fa4c | 888 | dp_packet_set_l2_pad_size(packet, size - plen); |
fa8d9001 JR |
889 | size = plen; /* Never pull padding. */ |
890 | ||
419681da | 891 | miniflow_push_words(mf, ipv6_src, &nh->ip6_src, |
d70e8c28 | 892 | sizeof nh->ip6_src / 8); |
419681da | 893 | miniflow_push_words(mf, ipv6_dst, &nh->ip6_dst, |
d70e8c28 | 894 | sizeof nh->ip6_dst / 8); |
daf4d3c1 JR |
895 | if (ct_nw_proto_p && md->ct_orig_tuple_ipv6) { |
896 | *ct_nw_proto_p = md->ct_orig_tuple.ipv6.ipv6_proto; | |
897 | if (*ct_nw_proto_p) { | |
898 | miniflow_push_words(mf, ct_ipv6_src, | |
899 | &md->ct_orig_tuple.ipv6.ipv6_src, | |
900 | 2 * | |
901 | sizeof md->ct_orig_tuple.ipv6.ipv6_src / 8); | |
902 | ct_tp_src = md->ct_orig_tuple.ipv6.src_port; | |
903 | ct_tp_dst = md->ct_orig_tuple.ipv6.dst_port; | |
904 | } | |
905 | } | |
419681da JR |
906 | |
907 | tc_flow = get_16aligned_be32(&nh->ip6_flow); | |
419681da JR |
908 | nw_tos = ntohl(tc_flow) >> 20; |
909 | nw_ttl = nh->ip6_hlim; | |
910 | nw_proto = nh->ip6_nxt; | |
911 | ||
523464ab DB |
912 | const struct ovs_16aligned_ip6_frag *frag_hdr; |
913 | if (!parse_ipv6_ext_hdrs__(&data, &size, &nw_proto, &nw_frag, | |
914 | &frag_hdr)) { | |
94a81e40 | 915 | goto out; |
50f06e16 | 916 | } |
97bc5b23 BP |
917 | |
918 | /* This needs to be after the parse_ipv6_ext_hdrs__() call because it | |
919 | * leaves the nw_frag word uninitialized. */ | |
920 | ASSERT_SEQUENTIAL(ipv6_label, nw_frag); | |
921 | ovs_be32 label = tc_flow & htonl(IPV6_LABEL_MASK); | |
922 | miniflow_push_be32(mf, ipv6_label, label); | |
419681da JR |
923 | } else { |
924 | if (dl_type == htons(ETH_TYPE_ARP) || | |
925 | dl_type == htons(ETH_TYPE_RARP)) { | |
74ff3298 | 926 | struct eth_addr arp_buf[2]; |
419681da JR |
927 | const struct arp_eth_header *arp = (const struct arp_eth_header *) |
928 | data_try_pull(&data, &size, ARP_ETH_HEADER_LEN); | |
929 | ||
930 | if (OVS_LIKELY(arp) && OVS_LIKELY(arp->ar_hrd == htons(1)) | |
931 | && OVS_LIKELY(arp->ar_pro == htons(ETH_TYPE_IP)) | |
932 | && OVS_LIKELY(arp->ar_hln == ETH_ADDR_LEN) | |
933 | && OVS_LIKELY(arp->ar_pln == 4)) { | |
d70e8c28 JR |
934 | miniflow_push_be32(mf, nw_src, |
935 | get_16aligned_be32(&arp->ar_spa)); | |
936 | miniflow_push_be32(mf, nw_dst, | |
937 | get_16aligned_be32(&arp->ar_tpa)); | |
419681da JR |
938 | |
939 | /* We only match on the lower 8 bits of the opcode. */ | |
940 | if (OVS_LIKELY(ntohs(arp->ar_op) <= 0xff)) { | |
d70e8c28 | 941 | miniflow_push_be32(mf, ipv6_label, 0); /* Pad with ARP. */ |
419681da JR |
942 | miniflow_push_be32(mf, nw_frag, htonl(ntohs(arp->ar_op))); |
943 | } | |
d31f1109 | 944 | |
419681da | 945 | /* Must be adjacent. */ |
268eca11 | 946 | ASSERT_SEQUENTIAL(arp_sha, arp_tha); |
419681da | 947 | |
74ff3298 JR |
948 | arp_buf[0] = arp->ar_sha; |
949 | arp_buf[1] = arp->ar_tha; | |
d70e8c28 | 950 | miniflow_push_macs(mf, arp_sha, arp_buf); |
06f41fc4 | 951 | miniflow_pad_to_64(mf, arp_tha); |
419681da | 952 | } |
3d2fbd70 | 953 | } else if (dl_type == htons(ETH_TYPE_NSH)) { |
17553f27 | 954 | struct ovs_key_nsh nsh; |
3d2fbd70 JS |
955 | |
956 | if (OVS_LIKELY(parse_nsh(&data, &size, &nsh))) { | |
f59cb331 | 957 | miniflow_push_words(mf, nsh, &nsh, |
17553f27 | 958 | sizeof(struct ovs_key_nsh) / |
f59cb331 | 959 | sizeof(uint64_t)); |
3d2fbd70 | 960 | } |
d31f1109 | 961 | } |
419681da JR |
962 | goto out; |
963 | } | |
964 | ||
2482b0b0 | 965 | packet->l4_ofs = (char *)data - frame; |
419681da | 966 | miniflow_push_be32(mf, nw_frag, |
a13784ba | 967 | bytes_to_be32(nw_frag, nw_tos, nw_ttl, nw_proto)); |
419681da JR |
968 | |
969 | if (OVS_LIKELY(!(nw_frag & FLOW_NW_FRAG_LATER))) { | |
970 | if (OVS_LIKELY(nw_proto == IPPROTO_TCP)) { | |
971 | if (OVS_LIKELY(size >= TCP_HEADER_LEN)) { | |
972 | const struct tcp_header *tcp = data; | |
973 | ||
74ff3298 | 974 | miniflow_push_be32(mf, arp_tha.ea[2], 0); |
419681da JR |
975 | miniflow_push_be32(mf, tcp_flags, |
976 | TCP_FLAGS_BE32(tcp->tcp_ctl)); | |
115f2481 JR |
977 | miniflow_push_be16(mf, tp_src, tcp->tcp_src); |
978 | miniflow_push_be16(mf, tp_dst, tcp->tcp_dst); | |
daf4d3c1 JR |
979 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
980 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da JR |
981 | } |
982 | } else if (OVS_LIKELY(nw_proto == IPPROTO_UDP)) { | |
983 | if (OVS_LIKELY(size >= UDP_HEADER_LEN)) { | |
984 | const struct udp_header *udp = data; | |
985 | ||
115f2481 JR |
986 | miniflow_push_be16(mf, tp_src, udp->udp_src); |
987 | miniflow_push_be16(mf, tp_dst, udp->udp_dst); | |
daf4d3c1 JR |
988 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
989 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
064af421 | 990 | } |
419681da JR |
991 | } else if (OVS_LIKELY(nw_proto == IPPROTO_SCTP)) { |
992 | if (OVS_LIKELY(size >= SCTP_HEADER_LEN)) { | |
993 | const struct sctp_header *sctp = data; | |
a26ef517 | 994 | |
115f2481 JR |
995 | miniflow_push_be16(mf, tp_src, sctp->sctp_src); |
996 | miniflow_push_be16(mf, tp_dst, sctp->sctp_dst); | |
daf4d3c1 JR |
997 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
998 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da JR |
999 | } |
1000 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMP)) { | |
1001 | if (OVS_LIKELY(size >= ICMP_HEADER_LEN)) { | |
1002 | const struct icmp_header *icmp = data; | |
1003 | ||
1004 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp_type)); | |
1005 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp_code)); | |
daf4d3c1 JR |
1006 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
1007 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da | 1008 | } |
0e612675 FL |
1009 | } else if (OVS_LIKELY(nw_proto == IPPROTO_IGMP)) { |
1010 | if (OVS_LIKELY(size >= IGMP_HEADER_LEN)) { | |
1011 | const struct igmp_header *igmp = data; | |
1012 | ||
1013 | miniflow_push_be16(mf, tp_src, htons(igmp->igmp_type)); | |
1014 | miniflow_push_be16(mf, tp_dst, htons(igmp->igmp_code)); | |
daf4d3c1 JR |
1015 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
1016 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
0e612675 FL |
1017 | miniflow_push_be32(mf, igmp_group_ip4, |
1018 | get_16aligned_be32(&igmp->group)); | |
daf4d3c1 | 1019 | miniflow_pad_to_64(mf, igmp_group_ip4); |
0e612675 | 1020 | } |
419681da | 1021 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMPV6)) { |
361a47d6 | 1022 | if (OVS_LIKELY(size >= sizeof(struct icmp6_data_header))) { |
daf4d3c1 JR |
1023 | const struct in6_addr *nd_target; |
1024 | struct eth_addr arp_buf[2]; | |
9b2b8497 VDA |
1025 | /* This will populate whether we received Option 1 |
1026 | * or Option 2. */ | |
1027 | uint8_t opt_type; | |
1028 | /* This holds the ND Reserved field. */ | |
361a47d6 IM |
1029 | ovs_be32 rso_flags; |
1030 | const struct icmp6_data_header *icmp6; | |
1031 | ||
1032 | icmp6 = data_pull(&data, &size, sizeof *icmp6); | |
1033 | if (parse_icmpv6(&data, &size, icmp6, | |
9b2b8497 | 1034 | &rso_flags, &nd_target, arp_buf, &opt_type)) { |
daf4d3c1 JR |
1035 | if (nd_target) { |
1036 | miniflow_push_words(mf, nd_target, nd_target, | |
1037 | sizeof *nd_target / sizeof(uint64_t)); | |
1038 | } | |
1039 | miniflow_push_macs(mf, arp_sha, arp_buf); | |
9b2b8497 VDA |
1040 | /* Populate options field and set the padding |
1041 | * accordingly. */ | |
1042 | if (opt_type != 0) { | |
1043 | miniflow_push_be16(mf, tcp_flags, htons(opt_type)); | |
1044 | /* Pad to align with 64 bits. | |
1045 | * This will zero out the pad3 field. */ | |
1046 | miniflow_pad_to_64(mf, tcp_flags); | |
1047 | } else { | |
1048 | /* Pad to align with 64 bits. | |
1049 | * This will zero out the tcp_flags & pad3 field. */ | |
1050 | miniflow_pad_to_64(mf, arp_tha); | |
1051 | } | |
361a47d6 IM |
1052 | miniflow_push_be16(mf, tp_src, |
1053 | htons(icmp6->icmp6_base.icmp6_type)); | |
1054 | miniflow_push_be16(mf, tp_dst, | |
1055 | htons(icmp6->icmp6_base.icmp6_code)); | |
daf4d3c1 | 1056 | miniflow_pad_to_64(mf, tp_dst); |
9b2b8497 | 1057 | /* Fill ND reserved field. */ |
361a47d6 | 1058 | miniflow_push_be32(mf, igmp_group_ip4, rso_flags); |
9b2b8497 | 1059 | miniflow_pad_to_64(mf, igmp_group_ip4); |
daf4d3c1 JR |
1060 | } else { |
1061 | /* ICMPv6 but not ND. */ | |
361a47d6 IM |
1062 | miniflow_push_be16(mf, tp_src, |
1063 | htons(icmp6->icmp6_base.icmp6_type)); | |
1064 | miniflow_push_be16(mf, tp_dst, | |
1065 | htons(icmp6->icmp6_base.icmp6_code)); | |
daf4d3c1 JR |
1066 | miniflow_push_be16(mf, ct_tp_src, ct_tp_src); |
1067 | miniflow_push_be16(mf, ct_tp_dst, ct_tp_dst); | |
419681da JR |
1068 | } |
1069 | } | |
064af421 BP |
1070 | } |
1071 | } | |
419681da | 1072 | out: |
5fcff47b | 1073 | dst->map = mf.map; |
064af421 BP |
1074 | } |
1075 | ||
54e2baec IM |
1076 | static ovs_be16 |
1077 | parse_dl_type(const void **datap, size_t *sizep) | |
206b60d4 | 1078 | { |
f0fb825a | 1079 | union flow_vlan_hdr vlans[FLOW_MAX_VLAN_HEADERS]; |
206b60d4 | 1080 | |
54e2baec | 1081 | parse_vlan(datap, sizep, vlans); |
206b60d4 | 1082 | |
54e2baec | 1083 | return parse_ethertype(datap, sizep); |
206b60d4 DDP |
1084 | } |
1085 | ||
34c2c343 BP |
1086 | /* Parses and return the TCP flags in 'packet', converted to host byte order. |
1087 | * If 'packet' is not an Ethernet packet embedding TCP, returns 0. | |
1088 | * | |
1089 | * The caller must ensure that 'packet' is at least ETH_HEADER_LEN bytes | |
1090 | * long.'*/ | |
aab96ec4 YL |
1091 | uint16_t |
1092 | parse_tcp_flags(struct dp_packet *packet) | |
1093 | { | |
1094 | const void *data = dp_packet_data(packet); | |
1095 | const char *frame = (const char *)data; | |
1096 | size_t size = dp_packet_size(packet); | |
1097 | ovs_be16 dl_type; | |
1098 | uint8_t nw_frag = 0, nw_proto = 0; | |
1099 | ||
940ac2ce | 1100 | if (!dp_packet_is_eth(packet)) { |
aab96ec4 YL |
1101 | return 0; |
1102 | } | |
1103 | ||
1104 | dp_packet_reset_offsets(packet); | |
1105 | ||
54e2baec | 1106 | dl_type = parse_dl_type(&data, &size); |
aab96ec4 YL |
1107 | if (OVS_UNLIKELY(eth_type_mpls(dl_type))) { |
1108 | packet->l2_5_ofs = (char *)data - frame; | |
1109 | } | |
1110 | if (OVS_LIKELY(dl_type == htons(ETH_TYPE_IP))) { | |
1111 | const struct ip_header *nh = data; | |
1112 | int ip_len; | |
1113 | uint16_t tot_len; | |
1114 | ||
1115 | if (OVS_UNLIKELY(!ipv4_sanity_check(nh, size, &ip_len, &tot_len))) { | |
1116 | return 0; | |
1117 | } | |
1118 | dp_packet_set_l2_pad_size(packet, size - tot_len); | |
1119 | packet->l3_ofs = (uint16_t)((char *)nh - frame); | |
1120 | nw_proto = nh->ip_proto; | |
1121 | nw_frag = ipv4_get_nw_frag(nh); | |
1122 | ||
1123 | size = tot_len; /* Never pull padding. */ | |
1124 | data_pull(&data, &size, ip_len); | |
1125 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { | |
1126 | const struct ovs_16aligned_ip6_hdr *nh = data; | |
1127 | uint16_t plen; | |
1128 | ||
1129 | if (OVS_UNLIKELY(!ipv6_sanity_check(nh, size))) { | |
1130 | return 0; | |
1131 | } | |
1132 | packet->l3_ofs = (uint16_t)((char *)nh - frame); | |
1133 | data_pull(&data, &size, sizeof *nh); | |
1134 | ||
1135 | plen = ntohs(nh->ip6_plen); /* Never pull padding. */ | |
1136 | dp_packet_set_l2_pad_size(packet, size - plen); | |
1137 | size = plen; | |
523464ab | 1138 | const struct ovs_16aligned_ip6_frag *frag_hdr; |
d0dd4908 | 1139 | nw_proto = nh->ip6_nxt; |
523464ab DB |
1140 | if (!parse_ipv6_ext_hdrs__(&data, &size, &nw_proto, &nw_frag, |
1141 | &frag_hdr)) { | |
aab96ec4 YL |
1142 | return 0; |
1143 | } | |
aab96ec4 YL |
1144 | } else { |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | packet->l4_ofs = (uint16_t)((char *)data - frame); | |
1149 | if (!(nw_frag & FLOW_NW_FRAG_LATER) && nw_proto == IPPROTO_TCP && | |
1150 | size >= TCP_HEADER_LEN) { | |
1151 | const struct tcp_header *tcp = data; | |
1152 | ||
1153 | return TCP_FLAGS(tcp->tcp_ctl); | |
1154 | } | |
1155 | ||
1156 | return 0; | |
1157 | } | |
1158 | ||
993410fb BP |
1159 | /* For every bit of a field that is wildcarded in 'wildcards', sets the |
1160 | * corresponding bit in 'flow' to zero. */ | |
1161 | void | |
1162 | flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards) | |
1163 | { | |
d70e8c28 JR |
1164 | uint64_t *flow_u64 = (uint64_t *) flow; |
1165 | const uint64_t *wc_u64 = (const uint64_t *) &wildcards->masks; | |
659c2346 | 1166 | size_t i; |
993410fb | 1167 | |
d70e8c28 JR |
1168 | for (i = 0; i < FLOW_U64S; i++) { |
1169 | flow_u64[i] &= wc_u64[i]; | |
26720e24 | 1170 | } |
993410fb BP |
1171 | } |
1172 | ||
d8d9c698 EJ |
1173 | void |
1174 | flow_unwildcard_tp_ports(const struct flow *flow, struct flow_wildcards *wc) | |
1175 | { | |
1176 | if (flow->nw_proto != IPPROTO_ICMP) { | |
1177 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
1178 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
1179 | } else { | |
1180 | wc->masks.tp_src = htons(0xff); | |
1181 | wc->masks.tp_dst = htons(0xff); | |
1182 | } | |
1183 | } | |
1184 | ||
50dcbd8e | 1185 | /* Initializes 'flow_metadata' with the metadata found in 'flow'. */ |
5d6c3af0 | 1186 | void |
50dcbd8e | 1187 | flow_get_metadata(const struct flow *flow, struct match *flow_metadata) |
5d6c3af0 | 1188 | { |
50dcbd8e JG |
1189 | int i; |
1190 | ||
7dc18ae9 | 1191 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 41); |
e9358af6 | 1192 | |
50dcbd8e JG |
1193 | match_init_catchall(flow_metadata); |
1194 | if (flow->tunnel.tun_id != htonll(0)) { | |
1195 | match_set_tun_id(flow_metadata, flow->tunnel.tun_id); | |
1196 | } | |
b666962b JG |
1197 | if (flow->tunnel.flags & FLOW_TNL_PUB_F_MASK) { |
1198 | match_set_tun_flags(flow_metadata, | |
1199 | flow->tunnel.flags & FLOW_TNL_PUB_F_MASK); | |
1200 | } | |
ffe4c74f | 1201 | if (flow->tunnel.ip_src) { |
50dcbd8e JG |
1202 | match_set_tun_src(flow_metadata, flow->tunnel.ip_src); |
1203 | } | |
ffe4c74f | 1204 | if (flow->tunnel.ip_dst) { |
50dcbd8e JG |
1205 | match_set_tun_dst(flow_metadata, flow->tunnel.ip_dst); |
1206 | } | |
ffe4c74f JB |
1207 | if (ipv6_addr_is_set(&flow->tunnel.ipv6_src)) { |
1208 | match_set_tun_ipv6_src(flow_metadata, &flow->tunnel.ipv6_src); | |
1209 | } | |
1210 | if (ipv6_addr_is_set(&flow->tunnel.ipv6_dst)) { | |
1211 | match_set_tun_ipv6_dst(flow_metadata, &flow->tunnel.ipv6_dst); | |
1212 | } | |
50dcbd8e JG |
1213 | if (flow->tunnel.gbp_id != htons(0)) { |
1214 | match_set_tun_gbp_id(flow_metadata, flow->tunnel.gbp_id); | |
1215 | } | |
1216 | if (flow->tunnel.gbp_flags) { | |
1217 | match_set_tun_gbp_flags(flow_metadata, flow->tunnel.gbp_flags); | |
1218 | } | |
7dc18ae9 WT |
1219 | if (flow->tunnel.erspan_ver) { |
1220 | match_set_tun_erspan_ver(flow_metadata, flow->tunnel.erspan_ver); | |
1221 | } | |
1222 | if (flow->tunnel.erspan_idx) { | |
1223 | match_set_tun_erspan_idx(flow_metadata, flow->tunnel.erspan_idx); | |
1224 | } | |
1225 | if (flow->tunnel.erspan_dir) { | |
1226 | match_set_tun_erspan_dir(flow_metadata, flow->tunnel.erspan_dir); | |
1227 | } | |
1228 | if (flow->tunnel.erspan_hwid) { | |
1229 | match_set_tun_erspan_hwid(flow_metadata, flow->tunnel.erspan_hwid); | |
1230 | } | |
6728d578 | 1231 | tun_metadata_get_fmd(&flow->tunnel, flow_metadata); |
50dcbd8e JG |
1232 | if (flow->metadata != htonll(0)) { |
1233 | match_set_metadata(flow_metadata, flow->metadata); | |
1234 | } | |
1235 | ||
1236 | for (i = 0; i < FLOW_N_REGS; i++) { | |
1237 | if (flow->regs[i]) { | |
1238 | match_set_reg(flow_metadata, i, flow->regs[i]); | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | if (flow->pkt_mark != 0) { | |
1243 | match_set_pkt_mark(flow_metadata, flow->pkt_mark); | |
1244 | } | |
1245 | ||
1246 | match_set_in_port(flow_metadata, flow->in_port.ofp_port); | |
6a81043e JS |
1247 | if (flow->packet_type != htonl(PT_ETH)) { |
1248 | match_set_packet_type(flow_metadata, flow->packet_type); | |
1249 | } | |
1250 | ||
07659514 JS |
1251 | if (flow->ct_state != 0) { |
1252 | match_set_ct_state(flow_metadata, flow->ct_state); | |
7827edca DA |
1253 | /* Match dl_type since it is required for the later interpretation of |
1254 | * the conntrack metadata. */ | |
1255 | match_set_dl_type(flow_metadata, flow->dl_type); | |
daf4d3c1 JR |
1256 | if (is_ct_valid(flow, NULL, NULL) && flow->ct_nw_proto != 0) { |
1257 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1258 | match_set_ct_nw_src(flow_metadata, flow->ct_nw_src); | |
1259 | match_set_ct_nw_dst(flow_metadata, flow->ct_nw_dst); | |
1260 | match_set_ct_nw_proto(flow_metadata, flow->ct_nw_proto); | |
1261 | match_set_ct_tp_src(flow_metadata, flow->ct_tp_src); | |
1262 | match_set_ct_tp_dst(flow_metadata, flow->ct_tp_dst); | |
1263 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1264 | match_set_ct_ipv6_src(flow_metadata, &flow->ct_ipv6_src); | |
1265 | match_set_ct_ipv6_dst(flow_metadata, &flow->ct_ipv6_dst); | |
1266 | match_set_ct_nw_proto(flow_metadata, flow->ct_nw_proto); | |
1267 | match_set_ct_tp_src(flow_metadata, flow->ct_tp_src); | |
1268 | match_set_ct_tp_dst(flow_metadata, flow->ct_tp_dst); | |
1269 | } | |
1270 | } | |
07659514 JS |
1271 | } |
1272 | if (flow->ct_zone != 0) { | |
1273 | match_set_ct_zone(flow_metadata, flow->ct_zone); | |
1274 | } | |
8e53fe8c JS |
1275 | if (flow->ct_mark != 0) { |
1276 | match_set_ct_mark(flow_metadata, flow->ct_mark); | |
1277 | } | |
2ff8484b | 1278 | if (!ovs_u128_is_zero(flow->ct_label)) { |
9daf2348 JS |
1279 | match_set_ct_label(flow_metadata, flow->ct_label); |
1280 | } | |
07659514 JS |
1281 | } |
1282 | ||
b02e6cf8 BP |
1283 | const char * |
1284 | ct_state_to_string(uint32_t state) | |
07659514 JS |
1285 | { |
1286 | switch (state) { | |
fd6cd1bf BP |
1287 | #define CS_STATE(ENUM, INDEX, NAME) case CS_##ENUM: return NAME; |
1288 | CS_STATES | |
1289 | #undef CS_STATE | |
07659514 JS |
1290 | default: |
1291 | return NULL; | |
1292 | } | |
5d6c3af0 EJ |
1293 | } |
1294 | ||
b02e6cf8 BP |
1295 | uint32_t |
1296 | ct_state_from_string(const char *s) | |
1297 | { | |
1298 | #define CS_STATE(ENUM, INDEX, NAME) \ | |
1299 | if (!strcmp(s, NAME)) { \ | |
1300 | return CS_##ENUM; \ | |
1301 | } | |
1302 | CS_STATES | |
1303 | #undef CS_STATE | |
1304 | return 0; | |
1305 | } | |
1306 | ||
b4293a33 YHW |
1307 | /* Parses conntrack state from 'state_str'. If it is parsed successfully, |
1308 | * stores the parsed ct_state in 'ct_state', and returns true. Otherwise, | |
1309 | * returns false, and reports error message in 'ds'. */ | |
1310 | bool | |
1311 | parse_ct_state(const char *state_str, uint32_t default_state, | |
1312 | uint32_t *ct_state, struct ds *ds) | |
1313 | { | |
1314 | uint32_t state = default_state; | |
1315 | char *state_s = xstrdup(state_str); | |
1316 | char *save_ptr = NULL; | |
1317 | ||
1318 | for (char *cs = strtok_r(state_s, ", ", &save_ptr); cs; | |
1319 | cs = strtok_r(NULL, ", ", &save_ptr)) { | |
1320 | uint32_t bit = ct_state_from_string(cs); | |
1321 | if (!bit) { | |
1322 | ds_put_format(ds, "%s: unknown connection tracking state flag", | |
1323 | cs); | |
11e47653 | 1324 | free(state_s); |
b4293a33 YHW |
1325 | return false; |
1326 | } | |
1327 | state |= bit; | |
1328 | } | |
1329 | ||
1330 | *ct_state = state; | |
1331 | free(state_s); | |
1332 | ||
1333 | return true; | |
1334 | } | |
1335 | ||
1336 | /* Checks the given conntrack state 'state' according to the constraints | |
1337 | * listed in ovs-fields (7). Returns true if it is valid. Otherwise, returns | |
1338 | * false, and reports error in 'ds'. */ | |
1339 | bool | |
1340 | validate_ct_state(uint32_t state, struct ds *ds) | |
1341 | { | |
1342 | bool valid_ct_state = true; | |
1343 | struct ds d_str = DS_EMPTY_INITIALIZER; | |
1344 | ||
1345 | format_flags(&d_str, ct_state_to_string, state, '|'); | |
1346 | ||
1347 | if (state && !(state & CS_TRACKED)) { | |
1348 | ds_put_format(ds, "%s: invalid connection state: " | |
1349 | "If \"trk\" is unset, no other flags are set\n", | |
1350 | ds_cstr(&d_str)); | |
1351 | valid_ct_state = false; | |
1352 | } | |
1353 | if (state & CS_INVALID && state & ~(CS_TRACKED | CS_INVALID)) { | |
1354 | ds_put_format(ds, "%s: invalid connection state: " | |
1355 | "when \"inv\" is set, only \"trk\" may also be set\n", | |
1356 | ds_cstr(&d_str)); | |
1357 | valid_ct_state = false; | |
1358 | } | |
1359 | if (state & CS_NEW && state & CS_ESTABLISHED) { | |
1360 | ds_put_format(ds, "%s: invalid connection state: " | |
1361 | "\"new\" and \"est\" are mutually exclusive\n", | |
1362 | ds_cstr(&d_str)); | |
1363 | valid_ct_state = false; | |
1364 | } | |
1365 | if (state & CS_NEW && state & CS_REPLY_DIR) { | |
1366 | ds_put_format(ds, "%s: invalid connection state: " | |
1367 | "\"new\" and \"rpy\" are mutually exclusive\n", | |
1368 | ds_cstr(&d_str)); | |
1369 | valid_ct_state = false; | |
1370 | } | |
1371 | ||
1372 | ds_destroy(&d_str); | |
1373 | return valid_ct_state; | |
1374 | } | |
1375 | ||
6846e91e BP |
1376 | /* Clears the fields in 'flow' associated with connection tracking. */ |
1377 | void | |
1378 | flow_clear_conntrack(struct flow *flow) | |
1379 | { | |
1380 | flow->ct_state = 0; | |
1381 | flow->ct_zone = 0; | |
1382 | flow->ct_mark = 0; | |
1383 | flow->ct_label = OVS_U128_ZERO; | |
1384 | ||
1385 | flow->ct_nw_proto = 0; | |
1386 | flow->ct_tp_src = 0; | |
1387 | flow->ct_tp_dst = 0; | |
1388 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1389 | flow->ct_nw_src = 0; | |
1390 | flow->ct_nw_dst = 0; | |
1391 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1392 | memset(&flow->ct_ipv6_src, 0, sizeof flow->ct_ipv6_src); | |
1393 | memset(&flow->ct_ipv6_dst, 0, sizeof flow->ct_ipv6_dst); | |
1394 | } | |
1395 | } | |
1396 | ||
064af421 | 1397 | char * |
50f96b10 BP |
1398 | flow_to_string(const struct flow *flow, |
1399 | const struct ofputil_port_map *port_map) | |
064af421 BP |
1400 | { |
1401 | struct ds ds = DS_EMPTY_INITIALIZER; | |
50f96b10 | 1402 | flow_format(&ds, flow, port_map); |
064af421 BP |
1403 | return ds_cstr(&ds); |
1404 | } | |
1405 | ||
4fe3445a PS |
1406 | const char * |
1407 | flow_tun_flag_to_string(uint32_t flags) | |
1408 | { | |
1409 | switch (flags) { | |
1410 | case FLOW_TNL_F_DONT_FRAGMENT: | |
1411 | return "df"; | |
1412 | case FLOW_TNL_F_CSUM: | |
1413 | return "csum"; | |
1414 | case FLOW_TNL_F_KEY: | |
1415 | return "key"; | |
94872594 JG |
1416 | case FLOW_TNL_F_OAM: |
1417 | return "oam"; | |
4fe3445a PS |
1418 | default: |
1419 | return NULL; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | void | |
1424 | format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t), | |
1425 | uint32_t flags, char del) | |
1426 | { | |
1427 | uint32_t bad = 0; | |
1428 | ||
1429 | if (!flags) { | |
8e4c1621 | 1430 | ds_put_char(ds, '0'); |
4fe3445a PS |
1431 | return; |
1432 | } | |
1433 | while (flags) { | |
1434 | uint32_t bit = rightmost_1bit(flags); | |
1435 | const char *s; | |
1436 | ||
1437 | s = bit_to_string(bit); | |
1438 | if (s) { | |
1439 | ds_put_format(ds, "%s%c", s, del); | |
1440 | } else { | |
1441 | bad |= bit; | |
1442 | } | |
1443 | ||
1444 | flags &= ~bit; | |
1445 | } | |
1446 | ||
1447 | if (bad) { | |
1448 | ds_put_format(ds, "0x%"PRIx32"%c", bad, del); | |
1449 | } | |
1450 | ds_chomp(ds, del); | |
1451 | } | |
1452 | ||
61bf6666 JR |
1453 | void |
1454 | format_flags_masked(struct ds *ds, const char *name, | |
1455 | const char *(*bit_to_string)(uint32_t), uint32_t flags, | |
8e4c1621 | 1456 | uint32_t mask, uint32_t max_mask) |
61bf6666 JR |
1457 | { |
1458 | if (name) { | |
0deec6d2 | 1459 | ds_put_format(ds, "%s%s=%s", colors.param, name, colors.end); |
61bf6666 | 1460 | } |
8e4c1621 JG |
1461 | |
1462 | if (mask == max_mask) { | |
1463 | format_flags(ds, bit_to_string, flags, '|'); | |
1464 | return; | |
1465 | } | |
1466 | ||
1467 | if (!mask) { | |
1468 | ds_put_cstr(ds, "0/0"); | |
1469 | return; | |
1470 | } | |
1471 | ||
61bf6666 JR |
1472 | while (mask) { |
1473 | uint32_t bit = rightmost_1bit(mask); | |
1474 | const char *s = bit_to_string(bit); | |
1475 | ||
1476 | ds_put_format(ds, "%s%s", (flags & bit) ? "+" : "-", | |
1477 | s ? s : "[Unknown]"); | |
1478 | mask &= ~bit; | |
1479 | } | |
1480 | } | |
1481 | ||
3d4b2e6e JS |
1482 | static void |
1483 | put_u16_masked(struct ds *s, uint16_t value, uint16_t mask) | |
1484 | { | |
1485 | if (!mask) { | |
1486 | ds_put_char(s, '*'); | |
1487 | } else { | |
1488 | if (value > 9) { | |
1489 | ds_put_format(s, "0x%"PRIx16, value); | |
1490 | } else { | |
1491 | ds_put_format(s, "%"PRIu16, value); | |
1492 | } | |
1493 | ||
1494 | if (mask != UINT16_MAX) { | |
1495 | ds_put_format(s, "/0x%"PRIx16, mask); | |
1496 | } | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | void | |
1501 | format_packet_type_masked(struct ds *s, ovs_be32 value, ovs_be32 mask) | |
1502 | { | |
1503 | if (value == htonl(PT_ETH) && mask == OVS_BE32_MAX) { | |
1504 | ds_put_cstr(s, "eth"); | |
1505 | } else { | |
1506 | ds_put_cstr(s, "packet_type=("); | |
1507 | put_u16_masked(s, pt_ns(value), pt_ns(mask)); | |
1508 | ds_put_char(s, ','); | |
1509 | put_u16_masked(s, pt_ns_type(value), pt_ns_type(mask)); | |
1510 | ds_put_char(s, ')'); | |
1511 | } | |
1512 | } | |
1513 | ||
8e4c1621 JG |
1514 | /* Scans a string 's' of flags to determine their numerical value and |
1515 | * returns the number of characters parsed using 'bit_to_string' to | |
1516 | * lookup flag names. Scanning continues until the character 'end' is | |
1517 | * reached. | |
1518 | * | |
1519 | * In the event of a failure, a negative error code will be returned. In | |
1520 | * addition, if 'res_string' is non-NULL then a descriptive string will | |
1521 | * be returned incorporating the identifying string 'field_name'. This | |
1522 | * error string must be freed by the caller. | |
1523 | * | |
1524 | * Upon success, the flag values will be stored in 'res_flags' and | |
1525 | * optionally 'res_mask', if it is non-NULL (if it is NULL then any masks | |
1526 | * present in the original string will be considered an error). The | |
1527 | * caller may restrict the acceptable set of values through the mask | |
1528 | * 'allowed'. */ | |
1529 | int | |
1530 | parse_flags(const char *s, const char *(*bit_to_string)(uint32_t), | |
1531 | char end, const char *field_name, char **res_string, | |
1532 | uint32_t *res_flags, uint32_t allowed, uint32_t *res_mask) | |
1533 | { | |
1534 | uint32_t result = 0; | |
1535 | int n; | |
1536 | ||
1537 | /* Parse masked flags in numeric format? */ | |
1538 | if (res_mask && ovs_scan(s, "%"SCNi32"/%"SCNi32"%n", | |
1539 | res_flags, res_mask, &n) && n > 0) { | |
1540 | if (*res_flags & ~allowed || *res_mask & ~allowed) { | |
1541 | goto unknown; | |
1542 | } | |
1543 | return n; | |
1544 | } | |
1545 | ||
1546 | n = 0; | |
1547 | ||
1548 | if (res_mask && (*s == '+' || *s == '-')) { | |
1549 | uint32_t flags = 0, mask = 0; | |
1550 | ||
1551 | /* Parse masked flags. */ | |
1552 | while (s[0] != end) { | |
1553 | bool set; | |
1554 | uint32_t bit; | |
1555 | size_t len; | |
1556 | ||
1557 | if (s[0] == '+') { | |
1558 | set = true; | |
1559 | } else if (s[0] == '-') { | |
1560 | set = false; | |
1561 | } else { | |
1562 | if (res_string) { | |
1563 | *res_string = xasprintf("%s: %s must be preceded by '+' " | |
1564 | "(for SET) or '-' (NOT SET)", s, | |
1565 | field_name); | |
1566 | } | |
1567 | return -EINVAL; | |
1568 | } | |
1569 | s++; | |
1570 | n++; | |
1571 | ||
1572 | for (bit = 1; bit; bit <<= 1) { | |
1573 | const char *fname = bit_to_string(bit); | |
1574 | ||
1575 | if (!fname) { | |
1576 | continue; | |
1577 | } | |
1578 | ||
1579 | len = strlen(fname); | |
1580 | if (strncmp(s, fname, len) || | |
1581 | (s[len] != '+' && s[len] != '-' && s[len] != end)) { | |
1582 | continue; | |
1583 | } | |
1584 | ||
1585 | if (mask & bit) { | |
1586 | /* bit already set. */ | |
1587 | if (res_string) { | |
1588 | *res_string = xasprintf("%s: Each %s flag can be " | |
1589 | "specified only once", s, | |
1590 | field_name); | |
1591 | } | |
1592 | return -EINVAL; | |
1593 | } | |
1594 | if (!(bit & allowed)) { | |
1595 | goto unknown; | |
1596 | } | |
1597 | if (set) { | |
1598 | flags |= bit; | |
1599 | } | |
1600 | mask |= bit; | |
1601 | break; | |
1602 | } | |
1603 | ||
1604 | if (!bit) { | |
1605 | goto unknown; | |
1606 | } | |
1607 | s += len; | |
1608 | n += len; | |
1609 | } | |
1610 | ||
1611 | *res_flags = flags; | |
1612 | *res_mask = mask; | |
1613 | return n; | |
1614 | } | |
1615 | ||
1616 | /* Parse unmasked flags. If a flag is present, it is set, otherwise | |
1617 | * it is not set. */ | |
1618 | while (s[n] != end) { | |
1619 | unsigned long long int flags; | |
1620 | uint32_t bit; | |
1621 | int n0; | |
1622 | ||
1623 | if (ovs_scan(&s[n], "%lli%n", &flags, &n0)) { | |
1624 | if (flags & ~allowed) { | |
1625 | goto unknown; | |
1626 | } | |
1627 | n += n0 + (s[n + n0] == '|'); | |
1628 | result |= flags; | |
1629 | continue; | |
1630 | } | |
1631 | ||
1632 | for (bit = 1; bit; bit <<= 1) { | |
1633 | const char *name = bit_to_string(bit); | |
1634 | size_t len; | |
1635 | ||
1636 | if (!name) { | |
1637 | continue; | |
1638 | } | |
1639 | ||
1640 | len = strlen(name); | |
1641 | if (!strncmp(s + n, name, len) && | |
1642 | (s[n + len] == '|' || s[n + len] == end)) { | |
1643 | if (!(bit & allowed)) { | |
1644 | goto unknown; | |
1645 | } | |
1646 | result |= bit; | |
1647 | n += len + (s[n + len] == '|'); | |
1648 | break; | |
1649 | } | |
1650 | } | |
1651 | ||
1652 | if (!bit) { | |
1653 | goto unknown; | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | *res_flags = result; | |
1658 | if (res_mask) { | |
1659 | *res_mask = UINT32_MAX; | |
1660 | } | |
1661 | if (res_string) { | |
1662 | *res_string = NULL; | |
1663 | } | |
1664 | return n; | |
1665 | ||
1666 | unknown: | |
1667 | if (res_string) { | |
1668 | *res_string = xasprintf("%s: unknown %s flag(s)", s, field_name); | |
1669 | } | |
1670 | return -EINVAL; | |
1671 | } | |
1672 | ||
064af421 | 1673 | void |
50f96b10 BP |
1674 | flow_format(struct ds *ds, |
1675 | const struct flow *flow, const struct ofputil_port_map *port_map) | |
064af421 | 1676 | { |
aa6c9932 | 1677 | struct match match; |
78c9486d | 1678 | struct flow_wildcards *wc = &match.wc; |
296e07ac | 1679 | |
aa6c9932 | 1680 | match_wc_init(&match, flow); |
78c9486d JR |
1681 | |
1682 | /* As this function is most often used for formatting a packet in a | |
1683 | * packet-in message, skip formatting the packet context fields that are | |
e6d9ab56 JR |
1684 | * all-zeroes to make the print-out easier on the eyes. This means that a |
1685 | * missing context field implies a zero value for that field. This is | |
1686 | * similar to OpenFlow encoding of these fields, as the specification | |
1687 | * states that all-zeroes context fields should not be encoded in the | |
1688 | * packet-in messages. */ | |
1689 | if (!flow->in_port.ofp_port) { | |
1690 | WC_UNMASK_FIELD(wc, in_port); | |
1691 | } | |
78c9486d JR |
1692 | if (!flow->skb_priority) { |
1693 | WC_UNMASK_FIELD(wc, skb_priority); | |
1694 | } | |
1695 | if (!flow->pkt_mark) { | |
1696 | WC_UNMASK_FIELD(wc, pkt_mark); | |
1697 | } | |
1698 | if (!flow->recirc_id) { | |
1699 | WC_UNMASK_FIELD(wc, recirc_id); | |
1700 | } | |
330de069 JR |
1701 | if (!flow->dp_hash) { |
1702 | WC_UNMASK_FIELD(wc, dp_hash); | |
1703 | } | |
07659514 JS |
1704 | if (!flow->ct_state) { |
1705 | WC_UNMASK_FIELD(wc, ct_state); | |
1706 | } | |
1707 | if (!flow->ct_zone) { | |
1708 | WC_UNMASK_FIELD(wc, ct_zone); | |
1709 | } | |
8e53fe8c JS |
1710 | if (!flow->ct_mark) { |
1711 | WC_UNMASK_FIELD(wc, ct_mark); | |
1712 | } | |
2ff8484b | 1713 | if (ovs_u128_is_zero(flow->ct_label)) { |
9daf2348 JS |
1714 | WC_UNMASK_FIELD(wc, ct_label); |
1715 | } | |
daf4d3c1 JR |
1716 | if (!is_ct_valid(flow, &match.wc, NULL) || !flow->ct_nw_proto) { |
1717 | WC_UNMASK_FIELD(wc, ct_nw_proto); | |
1718 | WC_UNMASK_FIELD(wc, ct_tp_src); | |
1719 | WC_UNMASK_FIELD(wc, ct_tp_dst); | |
1720 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1721 | WC_UNMASK_FIELD(wc, ct_nw_src); | |
1722 | WC_UNMASK_FIELD(wc, ct_nw_dst); | |
1723 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1724 | WC_UNMASK_FIELD(wc, ct_ipv6_src); | |
1725 | WC_UNMASK_FIELD(wc, ct_ipv6_dst); | |
1726 | } | |
1727 | } | |
78c9486d JR |
1728 | for (int i = 0; i < FLOW_N_REGS; i++) { |
1729 | if (!flow->regs[i]) { | |
1730 | WC_UNMASK_FIELD(wc, regs[i]); | |
1731 | } | |
1732 | } | |
1733 | if (!flow->metadata) { | |
1734 | WC_UNMASK_FIELD(wc, metadata); | |
1735 | } | |
1736 | ||
50f96b10 | 1737 | match_format(&match, port_map, ds, OFP_DEFAULT_PRIORITY); |
064af421 BP |
1738 | } |
1739 | ||
1740 | void | |
50f96b10 BP |
1741 | flow_print(FILE *stream, |
1742 | const struct flow *flow, const struct ofputil_port_map *port_map) | |
064af421 | 1743 | { |
50f96b10 | 1744 | char *s = flow_to_string(flow, port_map); |
064af421 BP |
1745 | fputs(s, stream); |
1746 | free(s); | |
1747 | } | |
54363004 BP |
1748 | \f |
1749 | /* flow_wildcards functions. */ | |
1750 | ||
d8ae4d67 | 1751 | /* Initializes 'wc' as a set of wildcards that matches every packet. */ |
54363004 | 1752 | void |
d8ae4d67 | 1753 | flow_wildcards_init_catchall(struct flow_wildcards *wc) |
54363004 | 1754 | { |
659c2346 | 1755 | memset(&wc->masks, 0, sizeof wc->masks); |
54363004 BP |
1756 | } |
1757 | ||
78c9486d JR |
1758 | /* Converts a flow into flow wildcards. It sets the wildcard masks based on |
1759 | * the packet headers extracted to 'flow'. It will not set the mask for fields | |
1760 | * that do not make sense for the packet type. OpenFlow-only metadata is | |
1761 | * wildcarded, but other metadata is unconditionally exact-matched. */ | |
f0fb825a EG |
1762 | void |
1763 | flow_wildcards_init_for_packet(struct flow_wildcards *wc, | |
1764 | const struct flow *flow) | |
78c9486d | 1765 | { |
cb1145d1 ZB |
1766 | ovs_be16 dl_type = OVS_BE16_MAX; |
1767 | ||
78c9486d JR |
1768 | memset(&wc->masks, 0x0, sizeof wc->masks); |
1769 | ||
0de8783a | 1770 | /* Update this function whenever struct flow changes. */ |
7dc18ae9 | 1771 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 41); |
0de8783a | 1772 | |
ffe4c74f | 1773 | if (flow_tnl_dst_is_set(&flow->tunnel)) { |
78c9486d JR |
1774 | if (flow->tunnel.flags & FLOW_TNL_F_KEY) { |
1775 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1776 | } | |
1777 | WC_MASK_FIELD(wc, tunnel.ip_src); | |
1778 | WC_MASK_FIELD(wc, tunnel.ip_dst); | |
ffe4c74f JB |
1779 | WC_MASK_FIELD(wc, tunnel.ipv6_src); |
1780 | WC_MASK_FIELD(wc, tunnel.ipv6_dst); | |
78c9486d JR |
1781 | WC_MASK_FIELD(wc, tunnel.flags); |
1782 | WC_MASK_FIELD(wc, tunnel.ip_tos); | |
1783 | WC_MASK_FIELD(wc, tunnel.ip_ttl); | |
1784 | WC_MASK_FIELD(wc, tunnel.tp_src); | |
1785 | WC_MASK_FIELD(wc, tunnel.tp_dst); | |
ac6073e3 MC |
1786 | WC_MASK_FIELD(wc, tunnel.gbp_id); |
1787 | WC_MASK_FIELD(wc, tunnel.gbp_flags); | |
7dc18ae9 WT |
1788 | WC_MASK_FIELD(wc, tunnel.erspan_ver); |
1789 | WC_MASK_FIELD(wc, tunnel.erspan_idx); | |
1790 | WC_MASK_FIELD(wc, tunnel.erspan_dir); | |
1791 | WC_MASK_FIELD(wc, tunnel.erspan_hwid); | |
9558d2a5 | 1792 | |
6728d578 JG |
1793 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1794 | if (flow->tunnel.metadata.present.map) { | |
1795 | wc->masks.tunnel.metadata.present.map = | |
1796 | flow->tunnel.metadata.present.map; | |
1797 | WC_MASK_FIELD(wc, tunnel.metadata.opts.u8); | |
8d8ab6c2 | 1798 | WC_MASK_FIELD(wc, tunnel.metadata.tab); |
6728d578 JG |
1799 | } |
1800 | } else { | |
1801 | WC_MASK_FIELD(wc, tunnel.metadata.present.len); | |
1802 | memset(wc->masks.tunnel.metadata.opts.gnv, 0xff, | |
1803 | flow->tunnel.metadata.present.len); | |
9558d2a5 | 1804 | } |
78c9486d JR |
1805 | } else if (flow->tunnel.tun_id) { |
1806 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1807 | } | |
1808 | ||
18080541 | 1809 | /* metadata, regs, and conj_id wildcarded. */ |
78c9486d JR |
1810 | |
1811 | WC_MASK_FIELD(wc, skb_priority); | |
1812 | WC_MASK_FIELD(wc, pkt_mark); | |
07659514 JS |
1813 | WC_MASK_FIELD(wc, ct_state); |
1814 | WC_MASK_FIELD(wc, ct_zone); | |
8e53fe8c | 1815 | WC_MASK_FIELD(wc, ct_mark); |
9daf2348 | 1816 | WC_MASK_FIELD(wc, ct_label); |
78c9486d JR |
1817 | WC_MASK_FIELD(wc, recirc_id); |
1818 | WC_MASK_FIELD(wc, dp_hash); | |
1819 | WC_MASK_FIELD(wc, in_port); | |
1820 | ||
c61f3870 BP |
1821 | /* actset_output wildcarded. */ |
1822 | ||
3d4b2e6e | 1823 | WC_MASK_FIELD(wc, packet_type); |
cb1145d1 ZB |
1824 | if (flow->packet_type == htonl(PT_ETH)) { |
1825 | WC_MASK_FIELD(wc, dl_dst); | |
1826 | WC_MASK_FIELD(wc, dl_src); | |
1827 | WC_MASK_FIELD(wc, dl_type); | |
1828 | /* No need to set mask of inner VLANs that don't exist. */ | |
1829 | for (int i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { | |
1830 | /* Always show the first zero VLAN. */ | |
1831 | WC_MASK_FIELD(wc, vlans[i]); | |
1832 | if (flow->vlans[i].tci == htons(0)) { | |
1833 | break; | |
1834 | } | |
f0fb825a | 1835 | } |
cb1145d1 ZB |
1836 | dl_type = flow->dl_type; |
1837 | } else { | |
1838 | dl_type = pt_ns_type_be(flow->packet_type); | |
f0fb825a | 1839 | } |
78c9486d | 1840 | |
cb1145d1 | 1841 | if (dl_type == htons(ETH_TYPE_IP)) { |
78c9486d JR |
1842 | WC_MASK_FIELD(wc, nw_src); |
1843 | WC_MASK_FIELD(wc, nw_dst); | |
daf4d3c1 JR |
1844 | WC_MASK_FIELD(wc, ct_nw_src); |
1845 | WC_MASK_FIELD(wc, ct_nw_dst); | |
cb1145d1 | 1846 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { |
78c9486d JR |
1847 | WC_MASK_FIELD(wc, ipv6_src); |
1848 | WC_MASK_FIELD(wc, ipv6_dst); | |
1849 | WC_MASK_FIELD(wc, ipv6_label); | |
daf4d3c1 JR |
1850 | if (is_nd(flow, wc)) { |
1851 | WC_MASK_FIELD(wc, arp_sha); | |
1852 | WC_MASK_FIELD(wc, arp_tha); | |
1853 | WC_MASK_FIELD(wc, nd_target); | |
1854 | } else { | |
1855 | WC_MASK_FIELD(wc, ct_ipv6_src); | |
1856 | WC_MASK_FIELD(wc, ct_ipv6_dst); | |
1857 | } | |
cb1145d1 ZB |
1858 | } else if (dl_type == htons(ETH_TYPE_ARP) || |
1859 | dl_type == htons(ETH_TYPE_RARP)) { | |
78c9486d JR |
1860 | WC_MASK_FIELD(wc, nw_src); |
1861 | WC_MASK_FIELD(wc, nw_dst); | |
1862 | WC_MASK_FIELD(wc, nw_proto); | |
1863 | WC_MASK_FIELD(wc, arp_sha); | |
1864 | WC_MASK_FIELD(wc, arp_tha); | |
1865 | return; | |
cb1145d1 | 1866 | } else if (eth_type_mpls(dl_type)) { |
78c9486d JR |
1867 | for (int i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { |
1868 | WC_MASK_FIELD(wc, mpls_lse[i]); | |
1869 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
1870 | break; | |
1871 | } | |
1872 | } | |
1873 | return; | |
3d2fbd70 JS |
1874 | } else if (flow->dl_type == htons(ETH_TYPE_NSH)) { |
1875 | WC_MASK_FIELD(wc, nsh.flags); | |
17553f27 | 1876 | WC_MASK_FIELD(wc, nsh.ttl); |
3d2fbd70 JS |
1877 | WC_MASK_FIELD(wc, nsh.mdtype); |
1878 | WC_MASK_FIELD(wc, nsh.np); | |
17553f27 | 1879 | WC_MASK_FIELD(wc, nsh.path_hdr); |
f59cb331 | 1880 | WC_MASK_FIELD(wc, nsh.context); |
78c9486d JR |
1881 | } else { |
1882 | return; /* Unknown ethertype. */ | |
1883 | } | |
1884 | ||
1885 | /* IPv4 or IPv6. */ | |
1886 | WC_MASK_FIELD(wc, nw_frag); | |
1887 | WC_MASK_FIELD(wc, nw_tos); | |
1888 | WC_MASK_FIELD(wc, nw_ttl); | |
1889 | WC_MASK_FIELD(wc, nw_proto); | |
daf4d3c1 JR |
1890 | WC_MASK_FIELD(wc, ct_nw_proto); |
1891 | WC_MASK_FIELD(wc, ct_tp_src); | |
1892 | WC_MASK_FIELD(wc, ct_tp_dst); | |
78c9486d JR |
1893 | |
1894 | /* No transport layer header in later fragments. */ | |
1895 | if (!(flow->nw_frag & FLOW_NW_FRAG_LATER) && | |
1896 | (flow->nw_proto == IPPROTO_ICMP || | |
1897 | flow->nw_proto == IPPROTO_ICMPV6 || | |
1898 | flow->nw_proto == IPPROTO_TCP || | |
1899 | flow->nw_proto == IPPROTO_UDP || | |
1900 | flow->nw_proto == IPPROTO_SCTP || | |
1901 | flow->nw_proto == IPPROTO_IGMP)) { | |
1902 | WC_MASK_FIELD(wc, tp_src); | |
1903 | WC_MASK_FIELD(wc, tp_dst); | |
1904 | ||
1905 | if (flow->nw_proto == IPPROTO_TCP) { | |
1906 | WC_MASK_FIELD(wc, tcp_flags); | |
78c9486d JR |
1907 | } else if (flow->nw_proto == IPPROTO_IGMP) { |
1908 | WC_MASK_FIELD(wc, igmp_group_ip4); | |
1909 | } | |
1910 | } | |
1911 | } | |
1912 | ||
0de8783a JR |
1913 | /* Return a map of possible fields for a packet of the same type as 'flow'. |
1914 | * Including extra bits in the returned mask is not wrong, it is just less | |
1915 | * optimal. | |
1916 | * | |
1917 | * This is a less precise version of flow_wildcards_init_for_packet() above. */ | |
361d808d | 1918 | void |
5fcff47b | 1919 | flow_wc_map(const struct flow *flow, struct flowmap *map) |
0de8783a JR |
1920 | { |
1921 | /* Update this function whenever struct flow changes. */ | |
7dc18ae9 | 1922 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 41); |
0de8783a | 1923 | |
5fcff47b JR |
1924 | flowmap_init(map); |
1925 | ||
ffe4c74f | 1926 | if (flow_tnl_dst_is_set(&flow->tunnel)) { |
5fcff47b | 1927 | FLOWMAP_SET__(map, tunnel, offsetof(struct flow_tnl, metadata)); |
6728d578 JG |
1928 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1929 | if (flow->tunnel.metadata.present.map) { | |
5fcff47b | 1930 | FLOWMAP_SET(map, tunnel.metadata); |
6728d578 JG |
1931 | } |
1932 | } else { | |
5fcff47b JR |
1933 | FLOWMAP_SET(map, tunnel.metadata.present.len); |
1934 | FLOWMAP_SET__(map, tunnel.metadata.opts.gnv, | |
1935 | flow->tunnel.metadata.present.len); | |
361d808d JR |
1936 | } |
1937 | } | |
0de8783a JR |
1938 | |
1939 | /* Metadata fields that can appear on packet input. */ | |
5fcff47b JR |
1940 | FLOWMAP_SET(map, skb_priority); |
1941 | FLOWMAP_SET(map, pkt_mark); | |
1942 | FLOWMAP_SET(map, recirc_id); | |
1943 | FLOWMAP_SET(map, dp_hash); | |
1944 | FLOWMAP_SET(map, in_port); | |
1945 | FLOWMAP_SET(map, dl_dst); | |
1946 | FLOWMAP_SET(map, dl_src); | |
1947 | FLOWMAP_SET(map, dl_type); | |
f0fb825a | 1948 | FLOWMAP_SET(map, vlans); |
07659514 JS |
1949 | FLOWMAP_SET(map, ct_state); |
1950 | FLOWMAP_SET(map, ct_zone); | |
8e53fe8c | 1951 | FLOWMAP_SET(map, ct_mark); |
9daf2348 | 1952 | FLOWMAP_SET(map, ct_label); |
2482b0b0 | 1953 | FLOWMAP_SET(map, packet_type); |
0de8783a JR |
1954 | |
1955 | /* Ethertype-dependent fields. */ | |
1956 | if (OVS_LIKELY(flow->dl_type == htons(ETH_TYPE_IP))) { | |
5fcff47b JR |
1957 | FLOWMAP_SET(map, nw_src); |
1958 | FLOWMAP_SET(map, nw_dst); | |
1959 | FLOWMAP_SET(map, nw_proto); | |
1960 | FLOWMAP_SET(map, nw_frag); | |
1961 | FLOWMAP_SET(map, nw_tos); | |
1962 | FLOWMAP_SET(map, nw_ttl); | |
8ecb3068 DDP |
1963 | FLOWMAP_SET(map, tp_src); |
1964 | FLOWMAP_SET(map, tp_dst); | |
daf4d3c1 JR |
1965 | FLOWMAP_SET(map, ct_nw_proto); |
1966 | FLOWMAP_SET(map, ct_nw_src); | |
1967 | FLOWMAP_SET(map, ct_nw_dst); | |
1968 | FLOWMAP_SET(map, ct_tp_src); | |
1969 | FLOWMAP_SET(map, ct_tp_dst); | |
5fcff47b | 1970 | |
0de8783a | 1971 | if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_IGMP)) { |
5fcff47b | 1972 | FLOWMAP_SET(map, igmp_group_ip4); |
0de8783a | 1973 | } else { |
5fcff47b | 1974 | FLOWMAP_SET(map, tcp_flags); |
0de8783a JR |
1975 | } |
1976 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
5fcff47b JR |
1977 | FLOWMAP_SET(map, ipv6_src); |
1978 | FLOWMAP_SET(map, ipv6_dst); | |
1979 | FLOWMAP_SET(map, ipv6_label); | |
1980 | FLOWMAP_SET(map, nw_proto); | |
1981 | FLOWMAP_SET(map, nw_frag); | |
1982 | FLOWMAP_SET(map, nw_tos); | |
1983 | FLOWMAP_SET(map, nw_ttl); | |
8ecb3068 DDP |
1984 | FLOWMAP_SET(map, tp_src); |
1985 | FLOWMAP_SET(map, tp_dst); | |
5fcff47b | 1986 | |
daf4d3c1 | 1987 | if (OVS_UNLIKELY(is_nd(flow, NULL))) { |
5fcff47b JR |
1988 | FLOWMAP_SET(map, nd_target); |
1989 | FLOWMAP_SET(map, arp_sha); | |
1990 | FLOWMAP_SET(map, arp_tha); | |
9b2b8497 VDA |
1991 | FLOWMAP_SET(map, tcp_flags); |
1992 | FLOWMAP_SET(map, igmp_group_ip4); | |
0de8783a | 1993 | } else { |
daf4d3c1 JR |
1994 | FLOWMAP_SET(map, ct_nw_proto); |
1995 | FLOWMAP_SET(map, ct_ipv6_src); | |
1996 | FLOWMAP_SET(map, ct_ipv6_dst); | |
1997 | FLOWMAP_SET(map, ct_tp_src); | |
1998 | FLOWMAP_SET(map, ct_tp_dst); | |
5fcff47b | 1999 | FLOWMAP_SET(map, tcp_flags); |
0de8783a JR |
2000 | } |
2001 | } else if (eth_type_mpls(flow->dl_type)) { | |
5fcff47b | 2002 | FLOWMAP_SET(map, mpls_lse); |
0de8783a JR |
2003 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
2004 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
5fcff47b JR |
2005 | FLOWMAP_SET(map, nw_src); |
2006 | FLOWMAP_SET(map, nw_dst); | |
2007 | FLOWMAP_SET(map, nw_proto); | |
2008 | FLOWMAP_SET(map, arp_sha); | |
2009 | FLOWMAP_SET(map, arp_tha); | |
3d2fbd70 JS |
2010 | } else if (flow->dl_type == htons(ETH_TYPE_NSH)) { |
2011 | FLOWMAP_SET(map, nsh.flags); | |
2012 | FLOWMAP_SET(map, nsh.mdtype); | |
2013 | FLOWMAP_SET(map, nsh.np); | |
17553f27 | 2014 | FLOWMAP_SET(map, nsh.path_hdr); |
f59cb331 | 2015 | FLOWMAP_SET(map, nsh.context); |
0de8783a | 2016 | } |
0de8783a JR |
2017 | } |
2018 | ||
c11c6faa AZ |
2019 | /* Clear the metadata and register wildcard masks. They are not packet |
2020 | * header fields. */ | |
2021 | void | |
2022 | flow_wildcards_clear_non_packet_fields(struct flow_wildcards *wc) | |
2023 | { | |
0de8783a | 2024 | /* Update this function whenever struct flow changes. */ |
7dc18ae9 | 2025 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 41); |
0de8783a | 2026 | |
c11c6faa AZ |
2027 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
2028 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
c61f3870 | 2029 | wc->masks.actset_output = 0; |
18080541 | 2030 | wc->masks.conj_id = 0; |
c11c6faa AZ |
2031 | } |
2032 | ||
ecf1e7ac BP |
2033 | /* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or |
2034 | * fields. */ | |
2035 | bool | |
2036 | flow_wildcards_is_catchall(const struct flow_wildcards *wc) | |
2037 | { | |
d70e8c28 | 2038 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
659c2346 | 2039 | size_t i; |
ecf1e7ac | 2040 | |
d70e8c28 JR |
2041 | for (i = 0; i < FLOW_U64S; i++) { |
2042 | if (wc_u64[i]) { | |
ecf1e7ac BP |
2043 | return false; |
2044 | } | |
2045 | } | |
ecf1e7ac BP |
2046 | return true; |
2047 | } | |
2048 | ||
368eefac EJ |
2049 | /* Sets 'dst' as the bitwise AND of wildcards in 'src1' and 'src2'. |
2050 | * That is, a bit or a field is wildcarded in 'dst' if it is wildcarded | |
2051 | * in 'src1' or 'src2' or both. */ | |
b5d97350 | 2052 | void |
368eefac EJ |
2053 | flow_wildcards_and(struct flow_wildcards *dst, |
2054 | const struct flow_wildcards *src1, | |
2055 | const struct flow_wildcards *src2) | |
b5d97350 | 2056 | { |
d70e8c28 JR |
2057 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
2058 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
2059 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
659c2346 | 2060 | size_t i; |
a79c50f3 | 2061 | |
d70e8c28 JR |
2062 | for (i = 0; i < FLOW_U64S; i++) { |
2063 | dst_u64[i] = src1_u64[i] & src2_u64[i]; | |
26720e24 | 2064 | } |
b5d97350 BP |
2065 | } |
2066 | ||
368eefac EJ |
2067 | /* Sets 'dst' as the bitwise OR of wildcards in 'src1' and 'src2'. That |
2068 | * is, a bit or a field is wildcarded in 'dst' if it is neither | |
2069 | * wildcarded in 'src1' nor 'src2'. */ | |
2070 | void | |
2071 | flow_wildcards_or(struct flow_wildcards *dst, | |
2072 | const struct flow_wildcards *src1, | |
2073 | const struct flow_wildcards *src2) | |
2074 | { | |
d70e8c28 JR |
2075 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
2076 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
2077 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
368eefac EJ |
2078 | size_t i; |
2079 | ||
d70e8c28 JR |
2080 | for (i = 0; i < FLOW_U64S; i++) { |
2081 | dst_u64[i] = src1_u64[i] | src2_u64[i]; | |
368eefac EJ |
2082 | } |
2083 | } | |
2084 | ||
b5d97350 BP |
2085 | /* Returns a hash of the wildcards in 'wc'. */ |
2086 | uint32_t | |
1006cda6 | 2087 | flow_wildcards_hash(const struct flow_wildcards *wc, uint32_t basis) |
b5d97350 | 2088 | { |
ac31c5af | 2089 | return flow_hash(&wc->masks, basis); |
b5d97350 BP |
2090 | } |
2091 | ||
2092 | /* Returns true if 'a' and 'b' represent the same wildcards, false if they are | |
2093 | * different. */ | |
2094 | bool | |
2095 | flow_wildcards_equal(const struct flow_wildcards *a, | |
2096 | const struct flow_wildcards *b) | |
2097 | { | |
659c2346 | 2098 | return flow_equal(&a->masks, &b->masks); |
b5d97350 BP |
2099 | } |
2100 | ||
2101 | /* Returns true if at least one bit or field is wildcarded in 'a' but not in | |
2102 | * 'b', false otherwise. */ | |
2103 | bool | |
2104 | flow_wildcards_has_extra(const struct flow_wildcards *a, | |
2105 | const struct flow_wildcards *b) | |
2106 | { | |
d70e8c28 JR |
2107 | const uint64_t *a_u64 = (const uint64_t *) &a->masks; |
2108 | const uint64_t *b_u64 = (const uint64_t *) &b->masks; | |
659c2346 | 2109 | size_t i; |
a79c50f3 | 2110 | |
d70e8c28 JR |
2111 | for (i = 0; i < FLOW_U64S; i++) { |
2112 | if ((a_u64[i] & b_u64[i]) != b_u64[i]) { | |
b6c9e612 BP |
2113 | return true; |
2114 | } | |
2115 | } | |
659c2346 BP |
2116 | return false; |
2117 | } | |
b6c9e612 | 2118 | |
659c2346 BP |
2119 | /* Returns true if 'a' and 'b' are equal, except that 0-bits (wildcarded bits) |
2120 | * in 'wc' do not need to be equal in 'a' and 'b'. */ | |
2121 | bool | |
2122 | flow_equal_except(const struct flow *a, const struct flow *b, | |
2123 | const struct flow_wildcards *wc) | |
2124 | { | |
d70e8c28 JR |
2125 | const uint64_t *a_u64 = (const uint64_t *) a; |
2126 | const uint64_t *b_u64 = (const uint64_t *) b; | |
2127 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; | |
659c2346 | 2128 | size_t i; |
d31f1109 | 2129 | |
d70e8c28 JR |
2130 | for (i = 0; i < FLOW_U64S; i++) { |
2131 | if ((a_u64[i] ^ b_u64[i]) & wc_u64[i]) { | |
659c2346 BP |
2132 | return false; |
2133 | } | |
47284b1f | 2134 | } |
659c2346 | 2135 | return true; |
b5d97350 BP |
2136 | } |
2137 | ||
b6c9e612 BP |
2138 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
2139 | * (A 0-bit indicates a wildcard bit.) */ | |
2140 | void | |
2141 | flow_wildcards_set_reg_mask(struct flow_wildcards *wc, int idx, uint32_t mask) | |
2142 | { | |
26720e24 | 2143 | wc->masks.regs[idx] = mask; |
b6c9e612 | 2144 | } |
ff55ea1f | 2145 | |
79fe0f46 BP |
2146 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
2147 | * (A 0-bit indicates a wildcard bit.) */ | |
2148 | void | |
2149 | flow_wildcards_set_xreg_mask(struct flow_wildcards *wc, int idx, uint64_t mask) | |
2150 | { | |
2151 | flow_set_xreg(&wc->masks, idx, mask); | |
2152 | } | |
2153 | ||
b23ada8e JP |
2154 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
2155 | * (A 0-bit indicates a wildcard bit.) */ | |
2156 | void | |
2157 | flow_wildcards_set_xxreg_mask(struct flow_wildcards *wc, int idx, | |
2158 | ovs_u128 mask) | |
2159 | { | |
2160 | flow_set_xxreg(&wc->masks, idx, mask); | |
2161 | } | |
2162 | ||
28a560d9 JR |
2163 | /* Calculates the 5-tuple hash from the given miniflow. |
2164 | * This returns the same value as flow_hash_5tuple for the corresponding | |
2165 | * flow. */ | |
4f150744 JR |
2166 | uint32_t |
2167 | miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis) | |
2168 | { | |
7dc18ae9 | 2169 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 41); |
28a560d9 | 2170 | uint32_t hash = basis; |
4f150744 | 2171 | |
28a560d9 JR |
2172 | if (flow) { |
2173 | ovs_be16 dl_type = MINIFLOW_GET_BE16(flow, dl_type); | |
362ad4ba | 2174 | uint8_t nw_proto; |
28a560d9 | 2175 | |
28a560d9 | 2176 | if (dl_type == htons(ETH_TYPE_IPV6)) { |
5fcff47b | 2177 | struct flowmap map = FLOWMAP_EMPTY_INITIALIZER; |
d70e8c28 | 2178 | uint64_t value; |
4f150744 | 2179 | |
5fcff47b JR |
2180 | FLOWMAP_SET(&map, ipv6_src); |
2181 | FLOWMAP_SET(&map, ipv6_dst); | |
2182 | ||
2183 | MINIFLOW_FOR_EACH_IN_FLOWMAP(value, flow, map) { | |
d70e8c28 | 2184 | hash = hash_add64(hash, value); |
28a560d9 | 2185 | } |
362ad4ba DDP |
2186 | } else if (dl_type == htons(ETH_TYPE_IP) |
2187 | || dl_type == htons(ETH_TYPE_ARP)) { | |
d70e8c28 JR |
2188 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_src)); |
2189 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_dst)); | |
362ad4ba DDP |
2190 | } else { |
2191 | goto out; | |
28a560d9 | 2192 | } |
362ad4ba DDP |
2193 | |
2194 | nw_proto = MINIFLOW_GET_U8(flow, nw_proto); | |
2195 | hash = hash_add(hash, nw_proto); | |
2196 | if (nw_proto != IPPROTO_TCP && nw_proto != IPPROTO_UDP | |
2197 | && nw_proto != IPPROTO_SCTP && nw_proto != IPPROTO_ICMP | |
2198 | && nw_proto != IPPROTO_ICMPV6) { | |
2199 | goto out; | |
2200 | } | |
2201 | ||
d70e8c28 | 2202 | /* Add both ports at once. */ |
f825fdd4 | 2203 | hash = hash_add(hash, (OVS_FORCE uint32_t) miniflow_get_ports(flow)); |
28a560d9 | 2204 | } |
362ad4ba DDP |
2205 | out: |
2206 | return hash_finish(hash, 42); | |
4f150744 JR |
2207 | } |
2208 | ||
268eca11 BP |
2209 | ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst); |
2210 | ASSERT_SEQUENTIAL(ipv6_src, ipv6_dst); | |
4f150744 | 2211 | |
63be20be AW |
2212 | /* Calculates the 5-tuple hash from the given flow. */ |
2213 | uint32_t | |
2214 | flow_hash_5tuple(const struct flow *flow, uint32_t basis) | |
2215 | { | |
7dc18ae9 | 2216 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 41); |
28a560d9 | 2217 | uint32_t hash = basis; |
63be20be | 2218 | |
28a560d9 | 2219 | if (flow) { |
28a560d9 JR |
2220 | |
2221 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
d70e8c28 JR |
2222 | const uint64_t *flow_u64 = (const uint64_t *)flow; |
2223 | int ofs = offsetof(struct flow, ipv6_src) / 8; | |
2224 | int end = ofs + 2 * sizeof flow->ipv6_src / 8; | |
63be20be | 2225 | |
d70e8c28 JR |
2226 | for (;ofs < end; ofs++) { |
2227 | hash = hash_add64(hash, flow_u64[ofs]); | |
28a560d9 | 2228 | } |
362ad4ba DDP |
2229 | } else if (flow->dl_type == htons(ETH_TYPE_IP) |
2230 | || flow->dl_type == htons(ETH_TYPE_ARP)) { | |
33c6a1b9 JR |
2231 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_src); |
2232 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_dst); | |
362ad4ba DDP |
2233 | } else { |
2234 | goto out; | |
28a560d9 | 2235 | } |
362ad4ba DDP |
2236 | |
2237 | hash = hash_add(hash, flow->nw_proto); | |
2238 | if (flow->nw_proto != IPPROTO_TCP && flow->nw_proto != IPPROTO_UDP | |
2239 | && flow->nw_proto != IPPROTO_SCTP && flow->nw_proto != IPPROTO_ICMP | |
2240 | && flow->nw_proto != IPPROTO_ICMPV6) { | |
2241 | goto out; | |
2242 | } | |
2243 | ||
d70e8c28 JR |
2244 | /* Add both ports at once. */ |
2245 | hash = hash_add(hash, | |
2246 | ((const uint32_t *)flow)[offsetof(struct flow, tp_src) | |
2247 | / sizeof(uint32_t)]); | |
28a560d9 | 2248 | } |
362ad4ba DDP |
2249 | out: |
2250 | return hash_finish(hash, 42); /* Arbitrary number. */ | |
63be20be AW |
2251 | } |
2252 | ||
ff55ea1f EJ |
2253 | /* Hashes 'flow' based on its L2 through L4 protocol information. */ |
2254 | uint32_t | |
2255 | flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis) | |
2256 | { | |
2257 | struct { | |
d31f1109 JP |
2258 | union { |
2259 | ovs_be32 ipv4_addr; | |
2260 | struct in6_addr ipv6_addr; | |
2261 | }; | |
ff55ea1f EJ |
2262 | ovs_be16 eth_type; |
2263 | ovs_be16 vlan_tci; | |
5b909cbb | 2264 | ovs_be16 tp_port; |
74ff3298 | 2265 | struct eth_addr eth_addr; |
ff55ea1f EJ |
2266 | uint8_t ip_proto; |
2267 | } fields; | |
2268 | ||
2269 | int i; | |
2270 | ||
2271 | memset(&fields, 0, sizeof fields); | |
74ff3298 JR |
2272 | for (i = 0; i < ARRAY_SIZE(fields.eth_addr.be16); i++) { |
2273 | fields.eth_addr.be16[i] = flow->dl_src.be16[i] ^ flow->dl_dst.be16[i]; | |
ff55ea1f | 2274 | } |
f0fb825a EG |
2275 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { |
2276 | fields.vlan_tci ^= flow->vlans[i].tci & htons(VLAN_VID_MASK); | |
2277 | } | |
ff55ea1f | 2278 | fields.eth_type = flow->dl_type; |
3e3eda95 EJ |
2279 | |
2280 | /* UDP source and destination port are not taken into account because they | |
2281 | * will not necessarily be symmetric in a bidirectional flow. */ | |
ff55ea1f | 2282 | if (fields.eth_type == htons(ETH_TYPE_IP)) { |
d31f1109 JP |
2283 | fields.ipv4_addr = flow->nw_src ^ flow->nw_dst; |
2284 | fields.ip_proto = flow->nw_proto; | |
c6bcb685 | 2285 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 2286 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
d31f1109 JP |
2287 | } |
2288 | } else if (fields.eth_type == htons(ETH_TYPE_IPV6)) { | |
2289 | const uint8_t *a = &flow->ipv6_src.s6_addr[0]; | |
2290 | const uint8_t *b = &flow->ipv6_dst.s6_addr[0]; | |
2291 | uint8_t *ipv6_addr = &fields.ipv6_addr.s6_addr[0]; | |
2292 | ||
2293 | for (i=0; i<16; i++) { | |
2294 | ipv6_addr[i] = a[i] ^ b[i]; | |
2295 | } | |
ff55ea1f | 2296 | fields.ip_proto = flow->nw_proto; |
c6bcb685 | 2297 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 2298 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
ff55ea1f | 2299 | } |
ff55ea1f | 2300 | } |
c49d1dd1 | 2301 | return jhash_bytes(&fields, sizeof fields, basis); |
ff55ea1f | 2302 | } |
520e9a2a | 2303 | |
6a0b0d3b JS |
2304 | /* Symmetrically Hashes non-IP 'flow' based on its L2 headers. */ |
2305 | uint32_t | |
2306 | flow_hash_symmetric_l2(const struct flow *flow, uint32_t basis) | |
2307 | { | |
2308 | union { | |
2309 | struct { | |
2310 | ovs_be16 eth_type; | |
2311 | ovs_be16 vlan_tci; | |
2312 | struct eth_addr eth_addr; | |
2313 | ovs_be16 pad; | |
2314 | }; | |
2315 | uint32_t word[3]; | |
2316 | } fields; | |
2317 | ||
2318 | uint32_t hash = basis; | |
2319 | int i; | |
2320 | ||
2321 | if (flow->packet_type != htonl(PT_ETH)) { | |
2322 | /* Cannot hash non-Ethernet flows */ | |
2323 | return 0; | |
2324 | } | |
2325 | ||
2326 | for (i = 0; i < ARRAY_SIZE(fields.eth_addr.be16); i++) { | |
2327 | fields.eth_addr.be16[i] = | |
2328 | flow->dl_src.be16[i] ^ flow->dl_dst.be16[i]; | |
2329 | } | |
2330 | fields.vlan_tci = 0; | |
2331 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { | |
2332 | fields.vlan_tci ^= flow->vlans[i].tci & htons(VLAN_VID_MASK); | |
2333 | } | |
2334 | fields.eth_type = flow->dl_type; | |
2335 | fields.pad = 0; | |
2336 | ||
2337 | hash = hash_add(hash, fields.word[0]); | |
2338 | hash = hash_add(hash, fields.word[1]); | |
2339 | hash = hash_add(hash, fields.word[2]); | |
2340 | return hash_finish(hash, basis); | |
2341 | } | |
2342 | ||
4249b547 JB |
2343 | /* Hashes 'flow' based on its L3 through L4 protocol information */ |
2344 | uint32_t | |
2345 | flow_hash_symmetric_l3l4(const struct flow *flow, uint32_t basis, | |
2346 | bool inc_udp_ports) | |
2347 | { | |
2348 | uint32_t hash = basis; | |
2349 | ||
2350 | /* UDP source and destination port are also taken into account. */ | |
2351 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2352 | hash = hash_add(hash, | |
2353 | (OVS_FORCE uint32_t) (flow->nw_src ^ flow->nw_dst)); | |
2354 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2355 | /* IPv6 addresses are 64-bit aligned inside struct flow. */ | |
2356 | const uint64_t *a = ALIGNED_CAST(uint64_t *, flow->ipv6_src.s6_addr); | |
2357 | const uint64_t *b = ALIGNED_CAST(uint64_t *, flow->ipv6_dst.s6_addr); | |
2358 | ||
caaabd19 | 2359 | for (int i = 0; i < sizeof flow->ipv6_src / sizeof *a; i++) { |
4249b547 JB |
2360 | hash = hash_add64(hash, a[i] ^ b[i]); |
2361 | } | |
2362 | } else { | |
6a0b0d3b JS |
2363 | /* Revert to hashing L2 headers */ |
2364 | return flow_hash_symmetric_l2(flow, basis); | |
4249b547 | 2365 | } |
4249b547 | 2366 | hash = hash_add(hash, flow->nw_proto); |
fb23ed47 VBJNU |
2367 | if (!(flow->nw_frag & FLOW_NW_FRAG_MASK) |
2368 | && (flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP || | |
2369 | (inc_udp_ports && flow->nw_proto == IPPROTO_UDP))) { | |
4249b547 JB |
2370 | hash = hash_add(hash, |
2371 | (OVS_FORCE uint16_t) (flow->tp_src ^ flow->tp_dst)); | |
2372 | } | |
2373 | ||
2374 | return hash_finish(hash, basis); | |
2375 | } | |
2376 | ||
84ddf96c MX |
2377 | /* Hashes 'flow' based on its nw_dst and nw_src for multipath. */ |
2378 | uint32_t | |
2379 | flow_hash_symmetric_l3(const struct flow *flow, uint32_t basis) | |
2380 | { | |
2381 | struct { | |
2382 | union { | |
2383 | ovs_be32 ipv4_addr; | |
2384 | struct in6_addr ipv6_addr; | |
2385 | }; | |
2386 | ovs_be16 eth_type; | |
2387 | } fields; | |
2388 | ||
2389 | int i; | |
2390 | ||
2391 | memset(&fields, 0, sizeof fields); | |
2392 | fields.eth_type = flow->dl_type; | |
2393 | ||
2394 | if (fields.eth_type == htons(ETH_TYPE_IP)) { | |
2395 | fields.ipv4_addr = flow->nw_src ^ flow->nw_dst; | |
2396 | } else if (fields.eth_type == htons(ETH_TYPE_IPV6)) { | |
2397 | const uint8_t *a = &flow->ipv6_src.s6_addr[0]; | |
2398 | const uint8_t *b = &flow->ipv6_dst.s6_addr[0]; | |
2399 | uint8_t *ipv6_addr = &fields.ipv6_addr.s6_addr[0]; | |
2400 | ||
2401 | for (i = 0; i < 16; i++) { | |
2402 | ipv6_addr[i] = a[i] ^ b[i]; | |
2403 | } | |
2404 | } | |
2405 | return jhash_bytes(&fields, sizeof fields, basis); | |
2406 | } | |
2407 | ||
94639963 JR |
2408 | /* Initialize a flow with random fields that matter for nx_hash_fields. */ |
2409 | void | |
2410 | flow_random_hash_fields(struct flow *flow) | |
2411 | { | |
2412 | uint16_t rnd = random_uint16(); | |
f0fb825a | 2413 | int i; |
94639963 JR |
2414 | |
2415 | /* Initialize to all zeros. */ | |
2416 | memset(flow, 0, sizeof *flow); | |
2417 | ||
74ff3298 JR |
2418 | eth_addr_random(&flow->dl_src); |
2419 | eth_addr_random(&flow->dl_dst); | |
94639963 | 2420 | |
f0fb825a EG |
2421 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { |
2422 | uint16_t vlan = random_uint16() & VLAN_VID_MASK; | |
2423 | flow->vlans[i].tpid = htons(ETH_TYPE_VLAN_8021Q); | |
2424 | flow->vlans[i].tci = htons(vlan | VLAN_CFI); | |
2425 | } | |
94639963 JR |
2426 | |
2427 | /* Make most of the random flows IPv4, some IPv6, and rest random. */ | |
2428 | flow->dl_type = rnd < 0x8000 ? htons(ETH_TYPE_IP) : | |
2429 | rnd < 0xc000 ? htons(ETH_TYPE_IPV6) : (OVS_FORCE ovs_be16)rnd; | |
2430 | ||
2431 | if (dl_type_is_ip_any(flow->dl_type)) { | |
2432 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2433 | flow->nw_src = (OVS_FORCE ovs_be32)random_uint32(); | |
2434 | flow->nw_dst = (OVS_FORCE ovs_be32)random_uint32(); | |
2435 | } else { | |
2436 | random_bytes(&flow->ipv6_src, sizeof flow->ipv6_src); | |
2437 | random_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst); | |
2438 | } | |
2439 | /* Make most of IP flows TCP, some UDP or SCTP, and rest random. */ | |
2440 | rnd = random_uint16(); | |
2441 | flow->nw_proto = rnd < 0x8000 ? IPPROTO_TCP : | |
2442 | rnd < 0xc000 ? IPPROTO_UDP : | |
2443 | rnd < 0xd000 ? IPPROTO_SCTP : (uint8_t)rnd; | |
2444 | if (flow->nw_proto == IPPROTO_TCP || | |
2445 | flow->nw_proto == IPPROTO_UDP || | |
2446 | flow->nw_proto == IPPROTO_SCTP) { | |
2447 | flow->tp_src = (OVS_FORCE ovs_be16)random_uint16(); | |
2448 | flow->tp_dst = (OVS_FORCE ovs_be16)random_uint16(); | |
2449 | } | |
2450 | } | |
2451 | } | |
2452 | ||
bcd2633a JP |
2453 | /* Masks the fields in 'wc' that are used by the flow hash 'fields'. */ |
2454 | void | |
6cdd5145 JP |
2455 | flow_mask_hash_fields(const struct flow *flow, struct flow_wildcards *wc, |
2456 | enum nx_hash_fields fields) | |
bcd2633a | 2457 | { |
f0fb825a | 2458 | int i; |
bcd2633a JP |
2459 | switch (fields) { |
2460 | case NX_HASH_FIELDS_ETH_SRC: | |
2461 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
2462 | break; | |
2463 | ||
2464 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
2465 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
2466 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
6cdd5145 JP |
2467 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2468 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2469 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
7f8a65ca | 2470 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
6cdd5145 JP |
2471 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); |
2472 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2473 | } | |
2474 | if (is_ip_any(flow)) { | |
2475 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
cbbab701 VDA |
2476 | /* Unwildcard port only for non-UDP packets as udp port |
2477 | * numbers are not used in hash calculations. | |
2478 | */ | |
2479 | if (flow->nw_proto != IPPROTO_UDP) { | |
2480 | flow_unwildcard_tp_ports(flow, wc); | |
2481 | } | |
6cdd5145 | 2482 | } |
f0fb825a EG |
2483 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { |
2484 | wc->masks.vlans[i].tci |= htons(VLAN_VID_MASK | VLAN_CFI); | |
2485 | } | |
bcd2633a | 2486 | break; |
4249b547 | 2487 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: |
fb23ed47 VBJNU |
2488 | if (is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP |
2489 | && !(flow->nw_frag & FLOW_NW_FRAG_MASK)) { | |
4249b547 JB |
2490 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); |
2491 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
2492 | } | |
73c7216a | 2493 | /* fall through */ |
4249b547 JB |
2494 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: |
2495 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2496 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2497 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
2498 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2499 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); | |
2500 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2501 | } else { | |
2502 | break; /* non-IP flow */ | |
2503 | } | |
4249b547 | 2504 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
fb23ed47 VBJNU |
2505 | if ((flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP) |
2506 | && !(flow->nw_frag & FLOW_NW_FRAG_MASK)) { | |
4249b547 JB |
2507 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); |
2508 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
2509 | } | |
2510 | break; | |
2511 | ||
417cfdb6 | 2512 | case NX_HASH_FIELDS_NW_SRC: |
2513 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2514 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2515 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2516 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); | |
2517 | } | |
2518 | break; | |
2519 | ||
2520 | case NX_HASH_FIELDS_NW_DST: | |
2521 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2522 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
2523 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2524 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2525 | } | |
2526 | break; | |
2527 | ||
84ddf96c MX |
2528 | case NX_HASH_FIELDS_SYMMETRIC_L3: |
2529 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2530 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
2531 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
2532 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2533 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); | |
2534 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
2535 | } | |
2536 | break; | |
2537 | ||
bcd2633a | 2538 | default: |
428b2edd | 2539 | OVS_NOT_REACHED(); |
bcd2633a JP |
2540 | } |
2541 | } | |
2542 | ||
520e9a2a EJ |
2543 | /* Hashes the portions of 'flow' designated by 'fields'. */ |
2544 | uint32_t | |
2545 | flow_hash_fields(const struct flow *flow, enum nx_hash_fields fields, | |
2546 | uint16_t basis) | |
2547 | { | |
2548 | switch (fields) { | |
2549 | ||
2550 | case NX_HASH_FIELDS_ETH_SRC: | |
74ff3298 | 2551 | return jhash_bytes(&flow->dl_src, sizeof flow->dl_src, basis); |
520e9a2a EJ |
2552 | |
2553 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
2554 | return flow_hash_symmetric_l4(flow, basis); | |
4249b547 JB |
2555 | |
2556 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: | |
2557 | return flow_hash_symmetric_l3l4(flow, basis, false); | |
2558 | ||
2559 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: | |
2560 | return flow_hash_symmetric_l3l4(flow, basis, true); | |
2561 | ||
417cfdb6 | 2562 | case NX_HASH_FIELDS_NW_SRC: |
2563 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2564 | return jhash_bytes(&flow->nw_src, sizeof flow->nw_src, basis); | |
2565 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2566 | return jhash_bytes(&flow->ipv6_src, sizeof flow->ipv6_src, basis); | |
2567 | } else { | |
2568 | return basis; | |
2569 | } | |
2570 | ||
2571 | case NX_HASH_FIELDS_NW_DST: | |
2572 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
2573 | return jhash_bytes(&flow->nw_dst, sizeof flow->nw_dst, basis); | |
2574 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2575 | return jhash_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst, basis); | |
2576 | } else { | |
2577 | return basis; | |
2578 | } | |
2579 | ||
84ddf96c MX |
2580 | case NX_HASH_FIELDS_SYMMETRIC_L3: |
2581 | return flow_hash_symmetric_l3(flow, basis); | |
520e9a2a EJ |
2582 | } |
2583 | ||
428b2edd | 2584 | OVS_NOT_REACHED(); |
520e9a2a EJ |
2585 | } |
2586 | ||
2587 | /* Returns a string representation of 'fields'. */ | |
2588 | const char * | |
2589 | flow_hash_fields_to_str(enum nx_hash_fields fields) | |
2590 | { | |
2591 | switch (fields) { | |
2592 | case NX_HASH_FIELDS_ETH_SRC: return "eth_src"; | |
2593 | case NX_HASH_FIELDS_SYMMETRIC_L4: return "symmetric_l4"; | |
4249b547 JB |
2594 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: return "symmetric_l3l4"; |
2595 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: return "symmetric_l3l4+udp"; | |
417cfdb6 | 2596 | case NX_HASH_FIELDS_NW_SRC: return "nw_src"; |
2597 | case NX_HASH_FIELDS_NW_DST: return "nw_dst"; | |
84ddf96c | 2598 | case NX_HASH_FIELDS_SYMMETRIC_L3: return "symmetric_l3"; |
520e9a2a EJ |
2599 | default: return "<unknown>"; |
2600 | } | |
2601 | } | |
2602 | ||
2603 | /* Returns true if the value of 'fields' is supported. Otherwise false. */ | |
2604 | bool | |
2605 | flow_hash_fields_valid(enum nx_hash_fields fields) | |
2606 | { | |
2607 | return fields == NX_HASH_FIELDS_ETH_SRC | |
4249b547 JB |
2608 | || fields == NX_HASH_FIELDS_SYMMETRIC_L4 |
2609 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4 | |
417cfdb6 | 2610 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP |
2611 | || fields == NX_HASH_FIELDS_NW_SRC | |
84ddf96c MX |
2612 | || fields == NX_HASH_FIELDS_NW_DST |
2613 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3; | |
520e9a2a | 2614 | } |
8b3b8dd1 | 2615 | |
368eefac EJ |
2616 | /* Returns a hash value for the bits of 'flow' that are active based on |
2617 | * 'wc', given 'basis'. */ | |
2618 | uint32_t | |
2619 | flow_hash_in_wildcards(const struct flow *flow, | |
2620 | const struct flow_wildcards *wc, uint32_t basis) | |
2621 | { | |
d70e8c28 JR |
2622 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
2623 | const uint64_t *flow_u64 = (const uint64_t *) flow; | |
368eefac EJ |
2624 | uint32_t hash; |
2625 | size_t i; | |
2626 | ||
2627 | hash = basis; | |
d70e8c28 JR |
2628 | for (i = 0; i < FLOW_U64S; i++) { |
2629 | hash = hash_add64(hash, flow_u64[i] & wc_u64[i]); | |
368eefac | 2630 | } |
d70e8c28 | 2631 | return hash_finish(hash, 8 * FLOW_U64S); |
368eefac EJ |
2632 | } |
2633 | ||
3719455c BP |
2634 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
2635 | * OpenFlow 1.0 "dl_vlan" value: | |
2636 | * | |
f0fb825a | 2637 | * - If it is in the range 0...4095, 'flow->vlans[0].tci' is set to match |
3719455c BP |
2638 | * that VLAN. Any existing PCP match is unchanged (it becomes 0 if |
2639 | * 'flow' previously matched packets without a VLAN header). | |
2640 | * | |
2641 | * - If it is OFP_VLAN_NONE, 'flow->vlan_tci' is set to match a packet | |
2642 | * without a VLAN tag. | |
2643 | * | |
2644 | * - Other values of 'vid' should not be used. */ | |
2645 | void | |
2f9366be | 2646 | flow_set_dl_vlan(struct flow *flow, ovs_be16 vid, int id) |
3719455c | 2647 | { |
0c436519 | 2648 | if (vid == htons(OFP10_VLAN_NONE)) { |
2f9366be | 2649 | flow->vlans[id].tci = htons(0); |
3719455c BP |
2650 | } else { |
2651 | vid &= htons(VLAN_VID_MASK); | |
2f9366be JL |
2652 | flow->vlans[id].tci &= ~htons(VLAN_VID_MASK); |
2653 | flow->vlans[id].tci |= htons(VLAN_CFI) | vid; | |
f0fb825a EG |
2654 | } |
2655 | } | |
2656 | ||
2657 | /* Sets the VLAN header TPID, which must be either ETH_TYPE_VLAN_8021Q or | |
2658 | * ETH_TYPE_VLAN_8021AD. */ | |
2659 | void | |
2660 | flow_fix_vlan_tpid(struct flow *flow) | |
2661 | { | |
2662 | if (flow->vlans[0].tpid == htons(0) && flow->vlans[0].tci != 0) { | |
2663 | flow->vlans[0].tpid = htons(ETH_TYPE_VLAN_8021Q); | |
3719455c BP |
2664 | } |
2665 | } | |
2666 | ||
cc34bc8c BP |
2667 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
2668 | * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID | |
2669 | * plus CFI). */ | |
2670 | void | |
2671 | flow_set_vlan_vid(struct flow *flow, ovs_be16 vid) | |
2672 | { | |
2673 | ovs_be16 mask = htons(VLAN_VID_MASK | VLAN_CFI); | |
f0fb825a EG |
2674 | flow->vlans[0].tci &= ~mask; |
2675 | flow->vlans[0].tci |= vid & mask; | |
cc34bc8c BP |
2676 | } |
2677 | ||
3719455c BP |
2678 | /* Sets the VLAN PCP that 'flow' matches to 'pcp', which should be in the |
2679 | * range 0...7. | |
2680 | * | |
2681 | * This function has no effect on the VLAN ID that 'flow' matches. | |
2682 | * | |
2683 | * After calling this function, 'flow' will not match packets without a VLAN | |
2684 | * header. */ | |
2685 | void | |
2f9366be | 2686 | flow_set_vlan_pcp(struct flow *flow, uint8_t pcp, int id) |
3719455c BP |
2687 | { |
2688 | pcp &= 0x07; | |
2f9366be JL |
2689 | flow->vlans[id].tci &= ~htons(VLAN_PCP_MASK); |
2690 | flow->vlans[id].tci |= htons((pcp << VLAN_PCP_SHIFT) | VLAN_CFI); | |
f0fb825a EG |
2691 | } |
2692 | ||
2693 | /* Counts the number of VLAN headers. */ | |
2694 | int | |
2695 | flow_count_vlan_headers(const struct flow *flow) | |
2696 | { | |
2697 | int i; | |
2698 | ||
2699 | for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) { | |
2700 | if (!(flow->vlans[i].tci & htons(VLAN_CFI))) { | |
2701 | break; | |
2702 | } | |
2703 | } | |
2704 | return i; | |
2705 | } | |
2706 | ||
2707 | /* Given '*p_an' and '*p_bn' pointing to one past the last VLAN header of | |
2708 | * 'a' and 'b' respectively, skip common VLANs so that they point to the | |
2709 | * first different VLAN counting from bottom. */ | |
2710 | void | |
2711 | flow_skip_common_vlan_headers(const struct flow *a, int *p_an, | |
2712 | const struct flow *b, int *p_bn) | |
2713 | { | |
2714 | int an = *p_an, bn = *p_bn; | |
2715 | ||
2716 | for (an--, bn--; an >= 0 && bn >= 0; an--, bn--) { | |
2717 | if (a->vlans[an].qtag != b->vlans[bn].qtag) { | |
2718 | break; | |
2719 | } | |
2720 | } | |
2721 | *p_an = an; | |
2722 | *p_bn = bn; | |
2723 | } | |
2724 | ||
2725 | void | |
2726 | flow_pop_vlan(struct flow *flow, struct flow_wildcards *wc) | |
2727 | { | |
2728 | int n = flow_count_vlan_headers(flow); | |
68c744fd BP |
2729 | if (n > 1) { |
2730 | if (wc) { | |
2731 | memset(&wc->masks.vlans[1], 0xff, | |
2732 | sizeof(union flow_vlan_hdr) * (n - 1)); | |
2733 | } | |
2734 | memmove(&flow->vlans[0], &flow->vlans[1], | |
2735 | sizeof(union flow_vlan_hdr) * (n - 1)); | |
f0fb825a | 2736 | } |
68c744fd BP |
2737 | if (n > 0) { |
2738 | memset(&flow->vlans[n - 1], 0, sizeof(union flow_vlan_hdr)); | |
f0fb825a | 2739 | } |
f0fb825a EG |
2740 | } |
2741 | ||
2742 | void | |
2743 | flow_push_vlan_uninit(struct flow *flow, struct flow_wildcards *wc) | |
2744 | { | |
2745 | if (wc) { | |
2746 | int n = flow_count_vlan_headers(flow); | |
6b6b508b DB |
2747 | if (n) { |
2748 | memset(wc->masks.vlans, 0xff, sizeof(union flow_vlan_hdr) * n); | |
2749 | } | |
f0fb825a EG |
2750 | } |
2751 | memmove(&flow->vlans[1], &flow->vlans[0], | |
2752 | sizeof(union flow_vlan_hdr) * (FLOW_MAX_VLAN_HEADERS - 1)); | |
2753 | memset(&flow->vlans[0], 0, sizeof(union flow_vlan_hdr)); | |
3719455c BP |
2754 | } |
2755 | ||
8bfd0fda BP |
2756 | /* Returns the number of MPLS LSEs present in 'flow' |
2757 | * | |
2758 | * Returns 0 if the 'dl_type' of 'flow' is not an MPLS ethernet type. | |
2759 | * Otherwise traverses 'flow''s MPLS label stack stopping at the | |
2760 | * first entry that has the BoS bit set. If no such entry exists then | |
2761 | * the maximum number of LSEs that can be stored in 'flow' is returned. | |
2762 | */ | |
2763 | int | |
2764 | flow_count_mpls_labels(const struct flow *flow, struct flow_wildcards *wc) | |
2765 | { | |
22d38fca | 2766 | /* dl_type is always masked. */ |
8bfd0fda BP |
2767 | if (eth_type_mpls(flow->dl_type)) { |
2768 | int i; | |
5af43325 | 2769 | int cnt; |
8bfd0fda | 2770 | |
5af43325 PS |
2771 | cnt = 0; |
2772 | for (i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { | |
8bfd0fda BP |
2773 | if (wc) { |
2774 | wc->masks.mpls_lse[i] |= htonl(MPLS_BOS_MASK); | |
2775 | } | |
2776 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
2777 | return i + 1; | |
2778 | } | |
5af43325 PS |
2779 | if (flow->mpls_lse[i]) { |
2780 | cnt++; | |
2781 | } | |
8bfd0fda | 2782 | } |
5af43325 | 2783 | return cnt; |
8bfd0fda BP |
2784 | } else { |
2785 | return 0; | |
2786 | } | |
2787 | } | |
2788 | ||
2789 | /* Returns the number consecutive of MPLS LSEs, starting at the | |
2790 | * innermost LSE, that are common in 'a' and 'b'. | |
2791 | * | |
2792 | * 'an' must be flow_count_mpls_labels(a). | |
2793 | * 'bn' must be flow_count_mpls_labels(b). | |
2794 | */ | |
2795 | int | |
2796 | flow_count_common_mpls_labels(const struct flow *a, int an, | |
2797 | const struct flow *b, int bn, | |
2798 | struct flow_wildcards *wc) | |
2799 | { | |
2800 | int min_n = MIN(an, bn); | |
2801 | if (min_n == 0) { | |
2802 | return 0; | |
2803 | } else { | |
2804 | int common_n = 0; | |
2805 | int a_last = an - 1; | |
2806 | int b_last = bn - 1; | |
2807 | int i; | |
2808 | ||
2809 | for (i = 0; i < min_n; i++) { | |
2810 | if (wc) { | |
2811 | wc->masks.mpls_lse[a_last - i] = OVS_BE32_MAX; | |
2812 | wc->masks.mpls_lse[b_last - i] = OVS_BE32_MAX; | |
2813 | } | |
2814 | if (a->mpls_lse[a_last - i] != b->mpls_lse[b_last - i]) { | |
2815 | break; | |
2816 | } else { | |
2817 | common_n++; | |
2818 | } | |
2819 | } | |
2820 | ||
2821 | return common_n; | |
2822 | } | |
2823 | } | |
2824 | ||
2825 | /* Adds a new outermost MPLS label to 'flow' and changes 'flow''s Ethernet type | |
2826 | * to 'mpls_eth_type', which must be an MPLS Ethertype. | |
2827 | * | |
2828 | * If the new label is the first MPLS label in 'flow', it is generated as; | |
2829 | * | |
2830 | * - label: 2, if 'flow' is IPv6, otherwise 0. | |
2831 | * | |
2832 | * - TTL: IPv4 or IPv6 TTL, if present and nonzero, otherwise 64. | |
2833 | * | |
2834 | * - TC: IPv4 or IPv6 TOS, if present, otherwise 0. | |
2835 | * | |
2836 | * - BoS: 1. | |
2837 | * | |
22d38fca | 2838 | * If the new label is the second or later label MPLS label in 'flow', it is |
8bfd0fda BP |
2839 | * generated as; |
2840 | * | |
368fb7e6 | 2841 | * - label: Copied from outer label. |
8bfd0fda BP |
2842 | * |
2843 | * - TTL: Copied from outer label. | |
2844 | * | |
2845 | * - TC: Copied from outer label. | |
2846 | * | |
2847 | * - BoS: 0. | |
2848 | * | |
2849 | * 'n' must be flow_count_mpls_labels(flow). 'n' must be less than | |
2850 | * FLOW_MAX_MPLS_LABELS (because otherwise flow->mpls_lse[] would overflow). | |
2851 | */ | |
2852 | void | |
2853 | flow_push_mpls(struct flow *flow, int n, ovs_be16 mpls_eth_type, | |
742c0ac3 | 2854 | struct flow_wildcards *wc, bool clear_flow_L3) |
8bfd0fda BP |
2855 | { |
2856 | ovs_assert(eth_type_mpls(mpls_eth_type)); | |
2857 | ovs_assert(n < FLOW_MAX_MPLS_LABELS); | |
2858 | ||
8bfd0fda BP |
2859 | if (n) { |
2860 | int i; | |
2861 | ||
22d38fca JR |
2862 | if (wc) { |
2863 | memset(&wc->masks.mpls_lse, 0xff, sizeof *wc->masks.mpls_lse * n); | |
2864 | } | |
8bfd0fda BP |
2865 | for (i = n; i >= 1; i--) { |
2866 | flow->mpls_lse[i] = flow->mpls_lse[i - 1]; | |
2867 | } | |
22d38fca | 2868 | flow->mpls_lse[0] = (flow->mpls_lse[1] & htonl(~MPLS_BOS_MASK)); |
8bfd0fda BP |
2869 | } else { |
2870 | int label = 0; /* IPv4 Explicit Null. */ | |
2871 | int tc = 0; | |
2872 | int ttl = 64; | |
2873 | ||
2874 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2875 | label = 2; | |
2876 | } | |
2877 | ||
2878 | if (is_ip_any(flow)) { | |
2879 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; | |
22d38fca JR |
2880 | if (wc) { |
2881 | wc->masks.nw_tos |= IP_DSCP_MASK; | |
2882 | wc->masks.nw_ttl = 0xff; | |
2883 | } | |
8bfd0fda BP |
2884 | |
2885 | if (flow->nw_ttl) { | |
2886 | ttl = flow->nw_ttl; | |
2887 | } | |
8bfd0fda BP |
2888 | } |
2889 | ||
2890 | flow->mpls_lse[0] = set_mpls_lse_values(ttl, tc, 1, htonl(label)); | |
2891 | ||
742c0ac3 JR |
2892 | if (clear_flow_L3) { |
2893 | /* Clear all L3 and L4 fields and dp_hash. */ | |
7dc18ae9 | 2894 | BUILD_ASSERT(FLOW_WC_SEQ == 41); |
742c0ac3 JR |
2895 | memset((char *) flow + FLOW_SEGMENT_2_ENDS_AT, 0, |
2896 | sizeof(struct flow) - FLOW_SEGMENT_2_ENDS_AT); | |
2897 | flow->dp_hash = 0; | |
2898 | } | |
8bfd0fda BP |
2899 | } |
2900 | flow->dl_type = mpls_eth_type; | |
2901 | } | |
2902 | ||
2903 | /* Tries to remove the outermost MPLS label from 'flow'. Returns true if | |
2904 | * successful, false otherwise. On success, sets 'flow''s Ethernet type to | |
2905 | * 'eth_type'. | |
2906 | * | |
2907 | * 'n' must be flow_count_mpls_labels(flow). */ | |
2908 | bool | |
2909 | flow_pop_mpls(struct flow *flow, int n, ovs_be16 eth_type, | |
2910 | struct flow_wildcards *wc) | |
2911 | { | |
2912 | int i; | |
2913 | ||
2914 | if (n == 0) { | |
2915 | /* Nothing to pop. */ | |
2916 | return false; | |
22d38fca JR |
2917 | } else if (n == FLOW_MAX_MPLS_LABELS) { |
2918 | if (wc) { | |
2919 | wc->masks.mpls_lse[n - 1] |= htonl(MPLS_BOS_MASK); | |
2920 | } | |
2921 | if (!(flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK))) { | |
2922 | /* Can't pop because don't know what to fill in mpls_lse[n - 1]. */ | |
2923 | return false; | |
2924 | } | |
8bfd0fda BP |
2925 | } |
2926 | ||
22d38fca JR |
2927 | if (wc) { |
2928 | memset(&wc->masks.mpls_lse[1], 0xff, | |
2929 | sizeof *wc->masks.mpls_lse * (n - 1)); | |
2930 | } | |
8bfd0fda BP |
2931 | for (i = 1; i < n; i++) { |
2932 | flow->mpls_lse[i - 1] = flow->mpls_lse[i]; | |
2933 | } | |
2934 | flow->mpls_lse[n - 1] = 0; | |
2935 | flow->dl_type = eth_type; | |
2936 | return true; | |
2937 | } | |
2938 | ||
b02475c5 SH |
2939 | /* Sets the MPLS Label that 'flow' matches to 'label', which is interpreted |
2940 | * as an OpenFlow 1.1 "mpls_label" value. */ | |
2941 | void | |
8bfd0fda | 2942 | flow_set_mpls_label(struct flow *flow, int idx, ovs_be32 label) |
b02475c5 | 2943 | { |
8bfd0fda | 2944 | set_mpls_lse_label(&flow->mpls_lse[idx], label); |
b02475c5 SH |
2945 | } |
2946 | ||
b676167a SH |
2947 | /* Sets the MPLS TTL that 'flow' matches to 'ttl', which should be in the |
2948 | * range 0...255. */ | |
2949 | void | |
8bfd0fda | 2950 | flow_set_mpls_ttl(struct flow *flow, int idx, uint8_t ttl) |
b676167a | 2951 | { |
8bfd0fda | 2952 | set_mpls_lse_ttl(&flow->mpls_lse[idx], ttl); |
b676167a SH |
2953 | } |
2954 | ||
b02475c5 SH |
2955 | /* Sets the MPLS TC that 'flow' matches to 'tc', which should be in the |
2956 | * range 0...7. */ | |
2957 | void | |
8bfd0fda | 2958 | flow_set_mpls_tc(struct flow *flow, int idx, uint8_t tc) |
b02475c5 | 2959 | { |
8bfd0fda | 2960 | set_mpls_lse_tc(&flow->mpls_lse[idx], tc); |
b02475c5 SH |
2961 | } |
2962 | ||
2963 | /* Sets the MPLS BOS bit that 'flow' matches to which should be 0 or 1. */ | |
2964 | void | |
8bfd0fda | 2965 | flow_set_mpls_bos(struct flow *flow, int idx, uint8_t bos) |
b02475c5 | 2966 | { |
8bfd0fda | 2967 | set_mpls_lse_bos(&flow->mpls_lse[idx], bos); |
b02475c5 SH |
2968 | } |
2969 | ||
8bfd0fda BP |
2970 | /* Sets the entire MPLS LSE. */ |
2971 | void | |
2972 | flow_set_mpls_lse(struct flow *flow, int idx, ovs_be32 lse) | |
2973 | { | |
2974 | flow->mpls_lse[idx] = lse; | |
2975 | } | |
52105b67 | 2976 | |
6f068379 BP |
2977 | static void |
2978 | flow_compose_l7(struct dp_packet *p, const void *l7, size_t l7_len) | |
2979 | { | |
2980 | if (l7_len) { | |
2981 | if (l7) { | |
2982 | dp_packet_put(p, l7, l7_len); | |
2983 | } else { | |
2984 | uint8_t *payload = dp_packet_put_uninit(p, l7_len); | |
2985 | for (size_t i = 0; i < l7_len; i++) { | |
2986 | payload[i] = i; | |
2987 | } | |
2988 | } | |
2989 | } | |
2990 | } | |
2991 | ||
437d0d22 | 2992 | static size_t |
6f068379 BP |
2993 | flow_compose_l4(struct dp_packet *p, const struct flow *flow, |
2994 | const void *l7, size_t l7_len) | |
52105b67 | 2995 | { |
89225d65 | 2996 | size_t orig_len = dp_packet_size(p); |
437d0d22 | 2997 | |
52105b67 JR |
2998 | if (!(flow->nw_frag & FLOW_NW_FRAG_ANY) |
2999 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) { | |
3000 | if (flow->nw_proto == IPPROTO_TCP) { | |
89225d65 | 3001 | struct tcp_header *tcp = dp_packet_put_zeros(p, sizeof *tcp); |
52105b67 JR |
3002 | tcp->tcp_src = flow->tp_src; |
3003 | tcp->tcp_dst = flow->tp_dst; | |
3004 | tcp->tcp_ctl = TCP_CTL(ntohs(flow->tcp_flags), 5); | |
6f068379 BP |
3005 | if (!(flow->tcp_flags & htons(TCP_SYN | TCP_FIN | TCP_RST))) { |
3006 | flow_compose_l7(p, l7, l7_len); | |
3007 | } | |
52105b67 | 3008 | } else if (flow->nw_proto == IPPROTO_UDP) { |
89225d65 | 3009 | struct udp_header *udp = dp_packet_put_zeros(p, sizeof *udp); |
52105b67 JR |
3010 | udp->udp_src = flow->tp_src; |
3011 | udp->udp_dst = flow->tp_dst; | |
6f068379 BP |
3012 | udp->udp_len = htons(sizeof *udp + l7_len); |
3013 | flow_compose_l7(p, l7, l7_len); | |
52105b67 | 3014 | } else if (flow->nw_proto == IPPROTO_SCTP) { |
89225d65 | 3015 | struct sctp_header *sctp = dp_packet_put_zeros(p, sizeof *sctp); |
52105b67 JR |
3016 | sctp->sctp_src = flow->tp_src; |
3017 | sctp->sctp_dst = flow->tp_dst; | |
6f068379 | 3018 | /* XXX Someone should figure out what L7 data to include. */ |
52105b67 | 3019 | } else if (flow->nw_proto == IPPROTO_ICMP) { |
89225d65 | 3020 | struct icmp_header *icmp = dp_packet_put_zeros(p, sizeof *icmp); |
52105b67 JR |
3021 | icmp->icmp_type = ntohs(flow->tp_src); |
3022 | icmp->icmp_code = ntohs(flow->tp_dst); | |
6f068379 BP |
3023 | if ((icmp->icmp_type == ICMP4_ECHO_REQUEST || |
3024 | icmp->icmp_type == ICMP4_ECHO_REPLY) | |
3025 | && icmp->icmp_code == 0) { | |
3026 | flow_compose_l7(p, l7, l7_len); | |
3027 | } else { | |
3028 | /* XXX Add inner IP packet for e.g. destination unreachable? */ | |
3029 | } | |
0e612675 | 3030 | } else if (flow->nw_proto == IPPROTO_IGMP) { |
89225d65 | 3031 | struct igmp_header *igmp = dp_packet_put_zeros(p, sizeof *igmp); |
0e612675 FL |
3032 | igmp->igmp_type = ntohs(flow->tp_src); |
3033 | igmp->igmp_code = ntohs(flow->tp_dst); | |
3034 | put_16aligned_be32(&igmp->group, flow->igmp_group_ip4); | |
52105b67 | 3035 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { |
361a47d6 IM |
3036 | struct icmp6_data_header *icmp6; |
3037 | ||
3038 | icmp6 = dp_packet_put_zeros(p, sizeof *icmp6); | |
3039 | icmp6->icmp6_base.icmp6_type = ntohs(flow->tp_src); | |
3040 | icmp6->icmp6_base.icmp6_code = ntohs(flow->tp_dst); | |
3041 | put_16aligned_be32(icmp6->icmp6_data.be32, flow->igmp_group_ip4); | |
3042 | ||
3043 | if (icmp6->icmp6_base.icmp6_code == 0 && | |
3044 | (icmp6->icmp6_base.icmp6_type == ND_NEIGHBOR_SOLICIT || | |
3045 | icmp6->icmp6_base.icmp6_type == ND_NEIGHBOR_ADVERT)) { | |
52105b67 | 3046 | struct in6_addr *nd_target; |
86d46f3c | 3047 | struct ovs_nd_lla_opt *lla_opt; |
52105b67 | 3048 | |
cf62fa4c | 3049 | nd_target = dp_packet_put_zeros(p, sizeof *nd_target); |
52105b67 JR |
3050 | *nd_target = flow->nd_target; |
3051 | ||
3052 | if (!eth_addr_is_zero(flow->arp_sha)) { | |
86d46f3c ZKL |
3053 | lla_opt = dp_packet_put_zeros(p, 8); |
3054 | lla_opt->len = 1; | |
3055 | lla_opt->type = ND_OPT_SOURCE_LINKADDR; | |
3056 | lla_opt->mac = flow->arp_sha; | |
52105b67 JR |
3057 | } |
3058 | if (!eth_addr_is_zero(flow->arp_tha)) { | |
86d46f3c ZKL |
3059 | lla_opt = dp_packet_put_zeros(p, 8); |
3060 | lla_opt->len = 1; | |
3061 | lla_opt->type = ND_OPT_TARGET_LINKADDR; | |
3062 | lla_opt->mac = flow->arp_tha; | |
52105b67 | 3063 | } |
361a47d6 IM |
3064 | } else if (icmp6->icmp6_base.icmp6_code == 0 && |
3065 | (icmp6->icmp6_base.icmp6_type == ICMP6_ECHO_REQUEST || | |
3066 | icmp6->icmp6_base.icmp6_type == ICMP6_ECHO_REPLY)) { | |
6f068379 BP |
3067 | flow_compose_l7(p, l7, l7_len); |
3068 | } else { | |
3069 | /* XXX Add inner IP packet for e.g. destination unreachable? */ | |
52105b67 | 3070 | } |
52105b67 JR |
3071 | } |
3072 | } | |
89225d65 BP |
3073 | |
3074 | return dp_packet_size(p) - orig_len; | |
52105b67 JR |
3075 | } |
3076 | ||
e839d01e DDP |
3077 | static void |
3078 | flow_compose_l4_csum(struct dp_packet *p, const struct flow *flow, | |
3079 | uint32_t pseudo_hdr_csum) | |
3080 | { | |
3081 | size_t l4_len = (char *) dp_packet_tail(p) - (char *) dp_packet_l4(p); | |
3082 | ||
3083 | if (!(flow->nw_frag & FLOW_NW_FRAG_ANY) | |
3084 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) { | |
3085 | if (flow->nw_proto == IPPROTO_TCP) { | |
3086 | struct tcp_header *tcp = dp_packet_l4(p); | |
3087 | ||
3476ce3a | 3088 | tcp->tcp_csum = 0; |
e839d01e DDP |
3089 | tcp->tcp_csum = csum_finish(csum_continue(pseudo_hdr_csum, |
3090 | tcp, l4_len)); | |
3091 | } else if (flow->nw_proto == IPPROTO_UDP) { | |
3092 | struct udp_header *udp = dp_packet_l4(p); | |
3093 | ||
3476ce3a | 3094 | udp->udp_csum = 0; |
e839d01e DDP |
3095 | udp->udp_csum = csum_finish(csum_continue(pseudo_hdr_csum, |
3096 | udp, l4_len)); | |
7a17a07d LR |
3097 | if (!udp->udp_csum) { |
3098 | udp->udp_csum = htons(0xffff); | |
3099 | } | |
e839d01e DDP |
3100 | } else if (flow->nw_proto == IPPROTO_ICMP) { |
3101 | struct icmp_header *icmp = dp_packet_l4(p); | |
3102 | ||
3476ce3a | 3103 | icmp->icmp_csum = 0; |
e839d01e DDP |
3104 | icmp->icmp_csum = csum(icmp, l4_len); |
3105 | } else if (flow->nw_proto == IPPROTO_IGMP) { | |
3106 | struct igmp_header *igmp = dp_packet_l4(p); | |
3107 | ||
3476ce3a | 3108 | igmp->igmp_csum = 0; |
e839d01e DDP |
3109 | igmp->igmp_csum = csum(igmp, l4_len); |
3110 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { | |
361a47d6 | 3111 | struct icmp6_data_header *icmp6 = dp_packet_l4(p); |
e839d01e | 3112 | |
361a47d6 IM |
3113 | icmp6->icmp6_base.icmp6_cksum = 0; |
3114 | icmp6->icmp6_base.icmp6_cksum = | |
3115 | csum_finish(csum_continue(pseudo_hdr_csum, icmp6, l4_len)); | |
e839d01e DDP |
3116 | } |
3117 | } | |
3118 | } | |
3119 | ||
bc0f5176 AZ |
3120 | /* Increase the size of packet composed by 'flow_compose_minimal' |
3121 | * up to 'size' bytes. Fixes all the required packet headers like | |
3122 | * ip/udp lengths and l3/l4 checksums. | |
3123 | * | |
3124 | * 'size' needs to be larger then the current packet size. */ | |
6f068379 | 3125 | void |
bc0f5176 | 3126 | packet_expand(struct dp_packet *p, const struct flow *flow, size_t size) |
3476ce3a IM |
3127 | { |
3128 | size_t extra_size; | |
3129 | ||
bc0f5176 | 3130 | ovs_assert(size > dp_packet_size(p)); |
3476ce3a IM |
3131 | |
3132 | extra_size = size - dp_packet_size(p); | |
3133 | dp_packet_put_zeros(p, extra_size); | |
3134 | ||
3135 | if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) { | |
3136 | struct eth_header *eth = dp_packet_eth(p); | |
3137 | ||
3138 | eth->eth_type = htons(dp_packet_size(p)); | |
3476ce3a IM |
3139 | } else if (dl_type_is_ip_any(flow->dl_type)) { |
3140 | uint32_t pseudo_hdr_csum; | |
3141 | size_t l4_len = (char *) dp_packet_tail(p) - (char *) dp_packet_l4(p); | |
3142 | ||
3143 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
3144 | struct ip_header *ip = dp_packet_l3(p); | |
3145 | ||
3146 | ip->ip_tot_len = htons(p->l4_ofs - p->l3_ofs + l4_len); | |
3147 | ip->ip_csum = 0; | |
3148 | ip->ip_csum = csum(ip, sizeof *ip); | |
3149 | ||
3150 | pseudo_hdr_csum = packet_csum_pseudoheader(ip); | |
3151 | } else { /* ETH_TYPE_IPV6 */ | |
3152 | struct ovs_16aligned_ip6_hdr *nh = dp_packet_l3(p); | |
3153 | ||
3154 | nh->ip6_plen = htons(l4_len); | |
3155 | pseudo_hdr_csum = packet_csum_pseudoheader6(nh); | |
3156 | } | |
3157 | ||
3158 | if ((!(flow->nw_frag & FLOW_NW_FRAG_ANY) | |
3159 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) | |
3160 | && flow->nw_proto == IPPROTO_UDP) { | |
3161 | struct udp_header *udp = dp_packet_l4(p); | |
3162 | ||
3163 | udp->udp_len = htons(l4_len + extra_size); | |
3164 | } | |
3165 | flow_compose_l4_csum(p, flow, pseudo_hdr_csum); | |
3166 | } | |
3167 | } | |
3168 | ||
3e24a894 | 3169 | /* Puts into 'p' a packet that flow_extract() would parse as having the given |
8b3b8dd1 BP |
3170 | * 'flow'. |
3171 | * | |
3172 | * (This is useful only for testing, obviously, and the packet isn't really | |
bc0f5176 AZ |
3173 | * valid. Lots of fields are just zeroed.) |
3174 | * | |
6f068379 BP |
3175 | * For packets whose protocols can encapsulate arbitrary L7 payloads, 'l7' and |
3176 | * 'l7_len' determine that payload: | |
3177 | * | |
3178 | * - If 'l7_len' is zero, no payload is included. | |
3179 | * | |
3180 | * - If 'l7_len' is nonzero and 'l7' is null, an arbitrary payload 'l7_len' | |
3181 | * bytes long is included. | |
3182 | * | |
3183 | * - If 'l7_len' is nonzero and 'l7' is nonnull, the payload is copied | |
3184 | * from 'l7'. */ | |
3185 | void | |
3186 | flow_compose(struct dp_packet *p, const struct flow *flow, | |
3187 | const void *l7, size_t l7_len) | |
8b3b8dd1 | 3188 | { |
005bb872 BP |
3189 | /* Add code to this function (or its callees) for emitting new fields or |
3190 | * protocols. (This isn't essential, so it can be skipped for initial | |
3191 | * testing.) */ | |
3192 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 41); | |
3193 | ||
e839d01e | 3194 | uint32_t pseudo_hdr_csum; |
437d0d22 JR |
3195 | size_t l4_len; |
3196 | ||
52105b67 | 3197 | /* eth_compose() sets l3 pointer and makes sure it is 32-bit aligned. */ |
cf62fa4c | 3198 | eth_compose(p, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0); |
8b3b8dd1 | 3199 | if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) { |
2482b0b0 | 3200 | struct eth_header *eth = dp_packet_eth(p); |
cf62fa4c | 3201 | eth->eth_type = htons(dp_packet_size(p)); |
8b3b8dd1 BP |
3202 | return; |
3203 | } | |
3204 | ||
f0fb825a EG |
3205 | for (int encaps = FLOW_MAX_VLAN_HEADERS - 1; encaps >= 0; encaps--) { |
3206 | if (flow->vlans[encaps].tci & htons(VLAN_CFI)) { | |
3207 | eth_push_vlan(p, flow->vlans[encaps].tpid, | |
3208 | flow->vlans[encaps].tci); | |
3209 | } | |
8b3b8dd1 BP |
3210 | } |
3211 | ||
cff78c88 | 3212 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
8b3b8dd1 BP |
3213 | struct ip_header *ip; |
3214 | ||
cf62fa4c | 3215 | ip = dp_packet_put_zeros(p, sizeof *ip); |
8b3b8dd1 | 3216 | ip->ip_ihl_ver = IP_IHL_VER(5, 4); |
eadef313 | 3217 | ip->ip_tos = flow->nw_tos; |
aabf5352 | 3218 | ip->ip_ttl = flow->nw_ttl; |
8b3b8dd1 | 3219 | ip->ip_proto = flow->nw_proto; |
7c457c33 BP |
3220 | put_16aligned_be32(&ip->ip_src, flow->nw_src); |
3221 | put_16aligned_be32(&ip->ip_dst, flow->nw_dst); | |
8b3b8dd1 | 3222 | |
eadef313 | 3223 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
7257b535 | 3224 | ip->ip_frag_off |= htons(IP_MORE_FRAGMENTS); |
eadef313 | 3225 | if (flow->nw_frag & FLOW_NW_FRAG_LATER) { |
7257b535 BP |
3226 | ip->ip_frag_off |= htons(100); |
3227 | } | |
3228 | } | |
df9b6612 | 3229 | |
cf62fa4c | 3230 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 3231 | |
6f068379 | 3232 | l4_len = flow_compose_l4(p, flow, l7, l7_len); |
52105b67 | 3233 | |
cf62fa4c PS |
3234 | ip = dp_packet_l3(p); |
3235 | ip->ip_tot_len = htons(p->l4_ofs - p->l3_ofs + l4_len); | |
ece9c294 | 3236 | /* Checksum has already been zeroed by put_zeros call. */ |
dc5a7ce7 | 3237 | ip->ip_csum = csum(ip, sizeof *ip); |
e839d01e DDP |
3238 | |
3239 | pseudo_hdr_csum = packet_csum_pseudoheader(ip); | |
3240 | flow_compose_l4_csum(p, flow, pseudo_hdr_csum); | |
cff78c88 | 3241 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
52105b67 JR |
3242 | struct ovs_16aligned_ip6_hdr *nh; |
3243 | ||
cf62fa4c | 3244 | nh = dp_packet_put_zeros(p, sizeof *nh); |
52105b67 JR |
3245 | put_16aligned_be32(&nh->ip6_flow, htonl(6 << 28) | |
3246 | htonl(flow->nw_tos << 20) | flow->ipv6_label); | |
3247 | nh->ip6_hlim = flow->nw_ttl; | |
3248 | nh->ip6_nxt = flow->nw_proto; | |
3249 | ||
3250 | memcpy(&nh->ip6_src, &flow->ipv6_src, sizeof(nh->ip6_src)); | |
3251 | memcpy(&nh->ip6_dst, &flow->ipv6_dst, sizeof(nh->ip6_dst)); | |
3252 | ||
cf62fa4c | 3253 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 3254 | |
6f068379 | 3255 | l4_len = flow_compose_l4(p, flow, l7, l7_len); |
52105b67 | 3256 | |
cf62fa4c | 3257 | nh = dp_packet_l3(p); |
437d0d22 | 3258 | nh->ip6_plen = htons(l4_len); |
e839d01e DDP |
3259 | |
3260 | pseudo_hdr_csum = packet_csum_pseudoheader6(nh); | |
3261 | flow_compose_l4_csum(p, flow, pseudo_hdr_csum); | |
cff78c88 SH |
3262 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
3263 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
8b3b8dd1 BP |
3264 | struct arp_eth_header *arp; |
3265 | ||
cf62fa4c PS |
3266 | arp = dp_packet_put_zeros(p, sizeof *arp); |
3267 | dp_packet_set_l3(p, arp); | |
8b3b8dd1 BP |
3268 | arp->ar_hrd = htons(1); |
3269 | arp->ar_pro = htons(ETH_TYPE_IP); | |
3270 | arp->ar_hln = ETH_ADDR_LEN; | |
3271 | arp->ar_pln = 4; | |
3272 | arp->ar_op = htons(flow->nw_proto); | |
3273 | ||
3274 | if (flow->nw_proto == ARP_OP_REQUEST || | |
3275 | flow->nw_proto == ARP_OP_REPLY) { | |
7c457c33 BP |
3276 | put_16aligned_be32(&arp->ar_spa, flow->nw_src); |
3277 | put_16aligned_be32(&arp->ar_tpa, flow->nw_dst); | |
74ff3298 JR |
3278 | arp->ar_sha = flow->arp_sha; |
3279 | arp->ar_tha = flow->arp_tha; | |
8b3b8dd1 BP |
3280 | } |
3281 | } | |
b02475c5 SH |
3282 | |
3283 | if (eth_type_mpls(flow->dl_type)) { | |
8bfd0fda BP |
3284 | int n; |
3285 | ||
cf62fa4c | 3286 | p->l2_5_ofs = p->l3_ofs; |
8bfd0fda BP |
3287 | for (n = 1; n < FLOW_MAX_MPLS_LABELS; n++) { |
3288 | if (flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK)) { | |
3289 | break; | |
3290 | } | |
3291 | } | |
3292 | while (n > 0) { | |
cf62fa4c | 3293 | push_mpls(p, flow->dl_type, flow->mpls_lse[--n]); |
8bfd0fda | 3294 | } |
b02475c5 | 3295 | } |
8b3b8dd1 | 3296 | } |
5cb7a798 BP |
3297 | \f |
3298 | /* Compressed flow. */ | |
3299 | ||
df40c152 | 3300 | /* Completes an initialization of 'dst' as a miniflow copy of 'src' begun by |
5fcff47b JR |
3301 | * the caller. The caller must have already computed 'dst->map' properly to |
3302 | * indicate the significant uint64_t elements of 'src'. | |
13751fd8 JR |
3303 | * |
3304 | * Normally the significant elements are the ones that are non-zero. However, | |
3305 | * when a miniflow is initialized from a (mini)mask, the values can be zeroes, | |
ceb3bd67 JR |
3306 | * so that the flow and mask always have the same maps. */ |
3307 | void | |
3308 | miniflow_init(struct miniflow *dst, const struct flow *src) | |
df40c152 | 3309 | { |
09b0fa9c | 3310 | uint64_t *dst_u64 = miniflow_values(dst); |
361d808d | 3311 | size_t idx; |
df40c152 | 3312 | |
5fcff47b JR |
3313 | FLOWMAP_FOR_EACH_INDEX(idx, dst->map) { |
3314 | *dst_u64++ = flow_u64_value(src, idx); | |
df40c152 BP |
3315 | } |
3316 | } | |
3317 | ||
361d808d | 3318 | /* Initialize the maps of 'flow' from 'src'. */ |
ceb3bd67 JR |
3319 | void |
3320 | miniflow_map_init(struct miniflow *flow, const struct flow *src) | |
5cb7a798 | 3321 | { |
ceb3bd67 | 3322 | /* Initialize map, counting the number of nonzero elements. */ |
5fcff47b JR |
3323 | flowmap_init(&flow->map); |
3324 | for (size_t i = 0; i < FLOW_U64S; i++) { | |
3325 | if (flow_u64_value(src, i)) { | |
3326 | flowmap_set(&flow->map, i, 1); | |
5cb7a798 BP |
3327 | } |
3328 | } | |
ceb3bd67 | 3329 | } |
5cb7a798 | 3330 | |
ceb3bd67 JR |
3331 | /* Allocates 'n' count of miniflows, consecutive in memory, initializing the |
3332 | * map of each from 'src'. | |
3333 | * Returns the size of the miniflow data. */ | |
3334 | size_t | |
3335 | miniflow_alloc(struct miniflow *dsts[], size_t n, const struct miniflow *src) | |
3336 | { | |
361d808d JR |
3337 | size_t n_values = miniflow_n_values(src); |
3338 | size_t data_size = MINIFLOW_VALUES_SIZE(n_values); | |
3339 | struct miniflow *dst = xmalloc(n * (sizeof *src + data_size)); | |
5fcff47b | 3340 | size_t i; |
ceb3bd67 JR |
3341 | |
3342 | COVERAGE_INC(miniflow_malloc); | |
3343 | ||
3344 | for (i = 0; i < n; i++) { | |
361d808d | 3345 | *dst = *src; /* Copy maps. */ |
ceb3bd67 | 3346 | dsts[i] = dst; |
361d808d JR |
3347 | dst += 1; /* Just past the maps. */ |
3348 | dst = (struct miniflow *)((uint64_t *)dst + n_values); /* Skip data. */ | |
ceb3bd67 JR |
3349 | } |
3350 | return data_size; | |
df40c152 | 3351 | } |
5cb7a798 | 3352 | |
ceb3bd67 JR |
3353 | /* Returns a miniflow copy of 'src'. The caller must eventually free() the |
3354 | * returned miniflow. */ | |
8fd47924 | 3355 | struct miniflow * |
ceb3bd67 | 3356 | miniflow_create(const struct flow *src) |
df40c152 | 3357 | { |
ceb3bd67 JR |
3358 | struct miniflow tmp; |
3359 | struct miniflow *dst; | |
3360 | ||
3361 | miniflow_map_init(&tmp, src); | |
3362 | ||
3363 | miniflow_alloc(&dst, 1, &tmp); | |
3364 | miniflow_init(dst, src); | |
3365 | return dst; | |
5cb7a798 BP |
3366 | } |
3367 | ||
3016f3e4 | 3368 | /* Initializes 'dst' as a copy of 'src'. The caller must have allocated |
8fd47924 | 3369 | * 'dst' to have inline space for 'n_values' data in 'src'. */ |
3016f3e4 | 3370 | void |
a851eb94 JR |
3371 | miniflow_clone(struct miniflow *dst, const struct miniflow *src, |
3372 | size_t n_values) | |
3016f3e4 | 3373 | { |
361d808d | 3374 | *dst = *src; /* Copy maps. */ |
09b0fa9c JR |
3375 | memcpy(miniflow_values(dst), miniflow_get_values(src), |
3376 | MINIFLOW_VALUES_SIZE(n_values)); | |
5cb7a798 BP |
3377 | } |
3378 | ||
3379 | /* Initializes 'dst' as a copy of 'src'. */ | |
3380 | void | |
3381 | miniflow_expand(const struct miniflow *src, struct flow *dst) | |
3382 | { | |
ad77e3c5 EJ |
3383 | memset(dst, 0, sizeof *dst); |
3384 | flow_union_with_miniflow(dst, src); | |
5cb7a798 BP |
3385 | } |
3386 | ||
8fd47924 | 3387 | /* Returns true if 'a' and 'b' are equal miniflows, false otherwise. */ |
5cb7a798 BP |
3388 | bool |
3389 | miniflow_equal(const struct miniflow *a, const struct miniflow *b) | |
3390 | { | |
09b0fa9c JR |
3391 | const uint64_t *ap = miniflow_get_values(a); |
3392 | const uint64_t *bp = miniflow_get_values(b); | |
5cb7a798 | 3393 | |
5fcff47b JR |
3394 | /* This is mostly called after a matching hash, so it is highly likely that |
3395 | * the maps are equal as well. */ | |
3396 | if (OVS_LIKELY(flowmap_equal(a->map, b->map))) { | |
361d808d | 3397 | return !memcmp(ap, bp, miniflow_n_values(a) * sizeof *ap); |
080e28d0 | 3398 | } else { |
5fcff47b | 3399 | size_t idx; |
df40c152 | 3400 | |
5fcff47b JR |
3401 | FLOWMAP_FOR_EACH_INDEX (idx, flowmap_or(a->map, b->map)) { |
3402 | if ((flowmap_is_set(&a->map, idx) ? *ap++ : 0) | |
3403 | != (flowmap_is_set(&b->map, idx) ? *bp++ : 0)) { | |
080e28d0 | 3404 | return false; |
df40c152 | 3405 | } |
5cb7a798 BP |
3406 | } |
3407 | } | |
3408 | ||
df40c152 | 3409 | return true; |
5cb7a798 BP |
3410 | } |
3411 | ||
de4ad4a2 JR |
3412 | /* Returns false if 'a' and 'b' differ at the places where there are 1-bits |
3413 | * in 'mask', true otherwise. */ | |
5cb7a798 BP |
3414 | bool |
3415 | miniflow_equal_in_minimask(const struct miniflow *a, const struct miniflow *b, | |
3416 | const struct minimask *mask) | |
3417 | { | |
09b0fa9c | 3418 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 3419 | size_t idx; |
5cb7a798 | 3420 | |
5fcff47b | 3421 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
1cea007c | 3422 | if ((miniflow_get(a, idx) ^ miniflow_get(b, idx)) & *p++) { |
080e28d0 | 3423 | return false; |
5cb7a798 BP |
3424 | } |
3425 | } | |
3426 | ||
3427 | return true; | |
3428 | } | |
3429 | ||
3430 | /* Returns true if 'a' and 'b' are equal at the places where there are 1-bits | |
3431 | * in 'mask', false if they differ. */ | |
3432 | bool | |
3433 | miniflow_equal_flow_in_minimask(const struct miniflow *a, const struct flow *b, | |
3434 | const struct minimask *mask) | |
3435 | { | |
09b0fa9c | 3436 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 3437 | size_t idx; |
5cb7a798 | 3438 | |
5fcff47b JR |
3439 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
3440 | if ((miniflow_get(a, idx) ^ flow_u64_value(b, idx)) & *p++) { | |
080e28d0 | 3441 | return false; |
5cb7a798 BP |
3442 | } |
3443 | } | |
3444 | ||
3445 | return true; | |
3446 | } | |
3447 | ||
5cb7a798 | 3448 | \f |
ceb3bd67 JR |
3449 | void |
3450 | minimask_init(struct minimask *mask, const struct flow_wildcards *wc) | |
3451 | { | |
3452 | miniflow_init(&mask->masks, &wc->masks); | |
3453 | } | |
3454 | ||
8fd47924 JR |
3455 | /* Returns a minimask copy of 'wc'. The caller must eventually free the |
3456 | * returned minimask with free(). */ | |
3457 | struct minimask * | |
3458 | minimask_create(const struct flow_wildcards *wc) | |
5cb7a798 | 3459 | { |
8fd47924 | 3460 | return (struct minimask *)miniflow_create(&wc->masks); |
5cb7a798 BP |
3461 | } |
3462 | ||
3463 | /* Initializes 'dst_' as the bit-wise "and" of 'a_' and 'b_'. | |
3464 | * | |
8fd47924 JR |
3465 | * The caller must provide room for FLOW_U64S "uint64_t"s in 'storage', which |
3466 | * must follow '*dst_' in memory, for use by 'dst_'. The caller must *not* | |
3467 | * free 'dst_' free(). */ | |
5cb7a798 BP |
3468 | void |
3469 | minimask_combine(struct minimask *dst_, | |
3470 | const struct minimask *a_, const struct minimask *b_, | |
d70e8c28 | 3471 | uint64_t storage[FLOW_U64S]) |
5cb7a798 BP |
3472 | { |
3473 | struct miniflow *dst = &dst_->masks; | |
d70e8c28 | 3474 | uint64_t *dst_values = storage; |
5cb7a798 BP |
3475 | const struct miniflow *a = &a_->masks; |
3476 | const struct miniflow *b = &b_->masks; | |
361d808d | 3477 | size_t idx; |
5cb7a798 | 3478 | |
5fcff47b | 3479 | flowmap_init(&dst->map); |
080e28d0 | 3480 | |
5fcff47b | 3481 | FLOWMAP_FOR_EACH_INDEX(idx, flowmap_and(a->map, b->map)) { |
361d808d | 3482 | /* Both 'a' and 'b' have non-zero data at 'idx'. */ |
5fcff47b | 3483 | uint64_t mask = *miniflow_get__(a, idx) & *miniflow_get__(b, idx); |
361d808d JR |
3484 | |
3485 | if (mask) { | |
5fcff47b | 3486 | flowmap_set(&dst->map, idx, 1); |
1cea007c | 3487 | *dst_values++ = mask; |
5cb7a798 BP |
3488 | } |
3489 | } | |
3490 | } | |
3491 | ||
8fd47924 | 3492 | /* Initializes 'wc' as a copy of 'mask'. */ |
5cb7a798 BP |
3493 | void |
3494 | minimask_expand(const struct minimask *mask, struct flow_wildcards *wc) | |
3495 | { | |
3496 | miniflow_expand(&mask->masks, &wc->masks); | |
3497 | } | |
3498 | ||
f4d335e9 JR |
3499 | /* Returns true if 'a' and 'b' are the same flow mask, false otherwise. |
3500 | * Minimasks may not have zero data values, so for the minimasks to be the | |
3501 | * same, they need to have the same map and the same data values. */ | |
5cb7a798 BP |
3502 | bool |
3503 | minimask_equal(const struct minimask *a, const struct minimask *b) | |
3504 | { | |
2ed65055 BP |
3505 | /* At first glance, it might seem that this can be reasonably optimized |
3506 | * into a single memcmp() for the total size of the region. Such an | |
3507 | * optimization will work OK with most implementations of memcmp() that | |
3508 | * proceed from the start of the regions to be compared to the end in | |
3509 | * reasonably sized chunks. However, memcmp() is not required to be | |
3510 | * implemented that way, and an implementation that, for example, compares | |
3511 | * all of the bytes in both regions without early exit when it finds a | |
3512 | * difference, or one that compares, say, 64 bytes at a time, could access | |
3513 | * an unmapped region of memory if minimasks 'a' and 'b' have different | |
3514 | * lengths. By first checking that the maps are the same with the first | |
3515 | * memcmp(), we verify that 'a' and 'b' have the same length and therefore | |
3516 | * ensure that the second memcmp() is safe. */ | |
3517 | return (!memcmp(a, b, sizeof *a) | |
3518 | && !memcmp(a + 1, b + 1, | |
3519 | MINIFLOW_VALUES_SIZE(miniflow_n_values(&a->masks)))); | |
5cb7a798 BP |
3520 | } |
3521 | ||
d4570fd8 | 3522 | /* Returns true if at least one bit matched by 'b' is wildcarded by 'a', |
5cb7a798 BP |
3523 | * false otherwise. */ |
3524 | bool | |
d4570fd8 | 3525 | minimask_has_extra(const struct minimask *a, const struct minimask *b) |
5cb7a798 | 3526 | { |
09b0fa9c | 3527 | const uint64_t *bp = miniflow_get_values(&b->masks); |
361d808d | 3528 | size_t idx; |
5cb7a798 | 3529 | |
5fcff47b | 3530 | FLOWMAP_FOR_EACH_INDEX(idx, b->masks.map) { |
d70e8c28 | 3531 | uint64_t b_u64 = *bp++; |
5cb7a798 | 3532 | |
d70e8c28 JR |
3533 | /* 'b_u64' is non-zero, check if the data in 'a' is either zero |
3534 | * or misses some of the bits in 'b_u64'. */ | |
5fcff47b JR |
3535 | if (!MINIFLOW_IN_MAP(&a->masks, idx) |
3536 | || ((*miniflow_get__(&a->masks, idx) & b_u64) != b_u64)) { | |
f4d335e9 | 3537 | return true; /* 'a' wildcards some bits 'b' doesn't. */ |
5cb7a798 BP |
3538 | } |
3539 | } | |
3540 | ||
3541 | return false; | |
3542 | } | |
f0fb825a EG |
3543 | |
3544 | void | |
3545 | flow_limit_vlans(int vlan_limit) | |
3546 | { | |
3547 | if (vlan_limit <= 0) { | |
3548 | flow_vlan_limit = FLOW_MAX_VLAN_HEADERS; | |
3549 | } else { | |
3550 | flow_vlan_limit = MIN(vlan_limit, FLOW_MAX_VLAN_HEADERS); | |
3551 | } | |
3552 | } | |
738c785f SB |
3553 | |
3554 | struct netdev * | |
3555 | flow_get_tunnel_netdev(struct flow_tnl *tunnel) | |
3556 | { | |
3557 | char iface[IFNAMSIZ]; | |
3558 | struct in6_addr ip6; | |
3559 | struct in6_addr gw; | |
3560 | ||
3561 | if (tunnel->ip_src) { | |
3562 | in6_addr_set_mapped_ipv4(&ip6, tunnel->ip_src); | |
3563 | } else if (ipv6_addr_is_set(&tunnel->ipv6_src)) { | |
3564 | ip6 = tunnel->ipv6_src; | |
3565 | } else { | |
3566 | return NULL; | |
3567 | } | |
3568 | ||
3569 | if (!ovs_router_lookup(0, &ip6, iface, NULL, &gw)) { | |
3570 | return NULL; | |
3571 | } | |
3572 | ||
3573 | return netdev_from_name(iface); | |
3574 | } |