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Commit | Line | Data |
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064af421 | 1 | /* |
18080541 | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc. |
064af421 | 3 | * |
a14bc59f BP |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
064af421 | 7 | * |
a14bc59f BP |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
064af421 BP |
15 | */ |
16 | #include <config.h> | |
17 | #include <sys/types.h> | |
18 | #include "flow.h" | |
d31f1109 | 19 | #include <errno.h> |
064af421 | 20 | #include <inttypes.h> |
5cb7a798 | 21 | #include <limits.h> |
064af421 | 22 | #include <netinet/in.h> |
d31f1109 JP |
23 | #include <netinet/icmp6.h> |
24 | #include <netinet/ip6.h> | |
5cb7a798 | 25 | #include <stdint.h> |
064af421 BP |
26 | #include <stdlib.h> |
27 | #include <string.h> | |
10a24935 | 28 | #include "byte-order.h" |
064af421 | 29 | #include "coverage.h" |
dc5a7ce7 | 30 | #include "csum.h" |
064af421 BP |
31 | #include "dynamic-string.h" |
32 | #include "hash.h" | |
c49d1dd1 | 33 | #include "jhash.h" |
aa6c9932 | 34 | #include "match.h" |
cf62fa4c | 35 | #include "dp-packet.h" |
064af421 | 36 | #include "openflow/openflow.h" |
064af421 | 37 | #include "packets.h" |
b5e7e61a | 38 | #include "odp-util.h" |
94639963 | 39 | #include "random.h" |
176aaa65 | 40 | #include "unaligned.h" |
064af421 | 41 | |
d76f09ea | 42 | COVERAGE_DEFINE(flow_extract); |
5cb7a798 | 43 | COVERAGE_DEFINE(miniflow_malloc); |
d76f09ea | 44 | |
d70e8c28 JR |
45 | /* U64 indices for segmented flow classification. */ |
46 | const uint8_t flow_segment_u64s[4] = { | |
47 | FLOW_SEGMENT_1_ENDS_AT / sizeof(uint64_t), | |
48 | FLOW_SEGMENT_2_ENDS_AT / sizeof(uint64_t), | |
49 | FLOW_SEGMENT_3_ENDS_AT / sizeof(uint64_t), | |
50 | FLOW_U64S | |
476f36e8 JR |
51 | }; |
52 | ||
268eca11 BP |
53 | /* Asserts that field 'f1' follows immediately after 'f0' in struct flow, |
54 | * without any intervening padding. */ | |
55 | #define ASSERT_SEQUENTIAL(f0, f1) \ | |
56 | BUILD_ASSERT_DECL(offsetof(struct flow, f0) \ | |
57 | + MEMBER_SIZEOF(struct flow, f0) \ | |
58 | == offsetof(struct flow, f1)) | |
59 | ||
60 | /* Asserts that fields 'f0' and 'f1' are in the same 32-bit aligned word within | |
61 | * struct flow. */ | |
62 | #define ASSERT_SAME_WORD(f0, f1) \ | |
63 | BUILD_ASSERT_DECL(offsetof(struct flow, f0) / 4 \ | |
64 | == offsetof(struct flow, f1) / 4) | |
65 | ||
66 | /* Asserts that 'f0' and 'f1' are both sequential and within the same 32-bit | |
67 | * aligned word in struct flow. */ | |
68 | #define ASSERT_SEQUENTIAL_SAME_WORD(f0, f1) \ | |
69 | ASSERT_SEQUENTIAL(f0, f1); \ | |
70 | ASSERT_SAME_WORD(f0, f1) | |
71 | ||
419681da JR |
72 | /* miniflow_extract() assumes the following to be true to optimize the |
73 | * extraction process. */ | |
268eca11 BP |
74 | ASSERT_SEQUENTIAL_SAME_WORD(dl_type, vlan_tci); |
75 | ||
76 | ASSERT_SEQUENTIAL_SAME_WORD(nw_frag, nw_tos); | |
77 | ASSERT_SEQUENTIAL_SAME_WORD(nw_tos, nw_ttl); | |
78 | ASSERT_SEQUENTIAL_SAME_WORD(nw_ttl, nw_proto); | |
419681da | 79 | |
d70e8c28 JR |
80 | /* TCP flags in the middle of a BE64, zeroes in the other half. */ |
81 | BUILD_ASSERT_DECL(offsetof(struct flow, tcp_flags) % 8 == 4); | |
82 | ||
419681da JR |
83 | #if WORDS_BIGENDIAN |
84 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl) \ | |
85 | << 16) | |
86 | #else | |
87 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl)) | |
88 | #endif | |
89 | ||
268eca11 | 90 | ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst); |
419681da JR |
91 | |
92 | /* Removes 'size' bytes from the head end of '*datap', of size '*sizep', which | |
93 | * must contain at least 'size' bytes of data. Returns the first byte of data | |
94 | * removed. */ | |
95 | static inline const void * | |
4c0e587c | 96 | data_pull(const void **datap, size_t *sizep, size_t size) |
a26ef517 | 97 | { |
4c0e587c | 98 | const char *data = *datap; |
419681da JR |
99 | *datap = data + size; |
100 | *sizep -= size; | |
101 | return data; | |
a26ef517 JP |
102 | } |
103 | ||
419681da JR |
104 | /* If '*datap' has at least 'size' bytes of data, removes that many bytes from |
105 | * the head end of '*datap' and returns the first byte removed. Otherwise, | |
106 | * returns a null pointer without modifying '*datap'. */ | |
107 | static inline const void * | |
4c0e587c | 108 | data_try_pull(const void **datap, size_t *sizep, size_t size) |
064af421 | 109 | { |
419681da | 110 | return OVS_LIKELY(*sizep >= size) ? data_pull(datap, sizep, size) : NULL; |
064af421 BP |
111 | } |
112 | ||
419681da JR |
113 | /* Context for pushing data to a miniflow. */ |
114 | struct mf_ctx { | |
5fcff47b | 115 | struct flowmap map; |
d70e8c28 JR |
116 | uint64_t *data; |
117 | uint64_t * const end; | |
419681da | 118 | }; |
064af421 | 119 | |
419681da JR |
120 | /* miniflow_push_* macros allow filling in a miniflow data values in order. |
121 | * Assertions are needed only when the layout of the struct flow is modified. | |
122 | * 'ofs' is a compile-time constant, which allows most of the code be optimized | |
694ffecc | 123 | * away. Some GCC versions gave warnings on ALWAYS_INLINE, so these are |
419681da JR |
124 | * defined as macros. */ |
125 | ||
b666962b | 126 | #if (FLOW_WC_SEQ != 33) |
419681da | 127 | #define MINIFLOW_ASSERT(X) ovs_assert(X) |
dce96af8 DDP |
128 | BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime " |
129 | "assertions enabled. Consider updating FLOW_WC_SEQ after " | |
130 | "testing") | |
419681da JR |
131 | #else |
132 | #define MINIFLOW_ASSERT(X) | |
133 | #endif | |
134 | ||
5fcff47b JR |
135 | /* True if 'IDX' and higher bits are not set. */ |
136 | #define ASSERT_FLOWMAP_NOT_SET(FM, IDX) \ | |
c2581ccf | 137 | { \ |
5fcff47b JR |
138 | MINIFLOW_ASSERT(!((FM)->bits[(IDX) / MAP_T_BITS] & \ |
139 | (FLOWMAP_MAX << ((IDX) % MAP_T_BITS)))); \ | |
140 | for (size_t i = (IDX) / MAP_T_BITS + 1; i < FLOWMAP_UNITS; i++) { \ | |
141 | MINIFLOW_ASSERT(!(FM)->bits[i]); \ | |
c2581ccf JR |
142 | } \ |
143 | } | |
361d808d | 144 | |
5fcff47b JR |
145 | #define miniflow_set_map(MF, OFS) \ |
146 | { \ | |
147 | ASSERT_FLOWMAP_NOT_SET(&MF.map, (OFS)); \ | |
148 | flowmap_set(&MF.map, (OFS), 1); \ | |
c2581ccf | 149 | } |
361d808d | 150 | |
5fcff47b JR |
151 | #define miniflow_assert_in_map(MF, OFS) \ |
152 | MINIFLOW_ASSERT(FLOWMAP_IS_SET(MF.map, (OFS))); \ | |
153 | ASSERT_FLOWMAP_NOT_SET(&MF.map, (OFS) + 1) | |
154 | ||
155 | #define miniflow_push_uint64_(MF, OFS, VALUE) \ | |
156 | { \ | |
157 | MINIFLOW_ASSERT(MF.data < MF.end && (OFS) % 8 == 0); \ | |
158 | *MF.data++ = VALUE; \ | |
159 | miniflow_set_map(MF, OFS / 8); \ | |
d31f1109 JP |
160 | } |
161 | ||
5fcff47b | 162 | #define miniflow_push_be64_(MF, OFS, VALUE) \ |
d70e8c28 | 163 | miniflow_push_uint64_(MF, OFS, (OVS_FORCE uint64_t)(VALUE)) |
419681da | 164 | |
5fcff47b JR |
165 | #define miniflow_push_uint32_(MF, OFS, VALUE) \ |
166 | { \ | |
167 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
168 | \ | |
169 | if ((OFS) % 8 == 0) { \ | |
170 | miniflow_set_map(MF, OFS / 8); \ | |
171 | *(uint32_t *)MF.data = VALUE; \ | |
172 | } else if ((OFS) % 8 == 4) { \ | |
173 | miniflow_assert_in_map(MF, OFS / 8); \ | |
174 | *((uint32_t *)MF.data + 1) = VALUE; \ | |
175 | MF.data++; \ | |
176 | } \ | |
d70e8c28 JR |
177 | } |
178 | ||
179 | #define miniflow_push_be32_(MF, OFS, VALUE) \ | |
180 | miniflow_push_uint32_(MF, OFS, (OVS_FORCE uint32_t)(VALUE)) | |
181 | ||
5fcff47b JR |
182 | #define miniflow_push_uint16_(MF, OFS, VALUE) \ |
183 | { \ | |
184 | MINIFLOW_ASSERT(MF.data < MF.end); \ | |
185 | \ | |
186 | if ((OFS) % 8 == 0) { \ | |
187 | miniflow_set_map(MF, OFS / 8); \ | |
188 | *(uint16_t *)MF.data = VALUE; \ | |
189 | } else if ((OFS) % 8 == 2) { \ | |
190 | miniflow_assert_in_map(MF, OFS / 8); \ | |
191 | *((uint16_t *)MF.data + 1) = VALUE; \ | |
192 | } else if ((OFS) % 8 == 4) { \ | |
193 | miniflow_assert_in_map(MF, OFS / 8); \ | |
194 | *((uint16_t *)MF.data + 2) = VALUE; \ | |
195 | } else if ((OFS) % 8 == 6) { \ | |
196 | miniflow_assert_in_map(MF, OFS / 8); \ | |
197 | *((uint16_t *)MF.data + 3) = VALUE; \ | |
198 | MF.data++; \ | |
199 | } \ | |
200 | } | |
201 | ||
202 | #define miniflow_pad_to_64_(MF, OFS) \ | |
203 | { \ | |
204 | MINIFLOW_ASSERT((OFS) % 8 != 0); \ | |
205 | miniflow_assert_in_map(MF, OFS / 8); \ | |
206 | \ | |
207 | memset((uint8_t *)MF.data + (OFS) % 8, 0, 8 - (OFS) % 8); \ | |
208 | MF.data++; \ | |
d70e8c28 JR |
209 | } |
210 | ||
211 | #define miniflow_push_be16_(MF, OFS, VALUE) \ | |
419681da JR |
212 | miniflow_push_uint16_(MF, OFS, (OVS_FORCE uint16_t)VALUE); |
213 | ||
5fcff47b JR |
214 | #define miniflow_set_maps(MF, OFS, N_WORDS) \ |
215 | { \ | |
216 | size_t ofs = (OFS); \ | |
217 | size_t n_words = (N_WORDS); \ | |
218 | \ | |
219 | MINIFLOW_ASSERT(n_words && MF.data + n_words <= MF.end); \ | |
220 | ASSERT_FLOWMAP_NOT_SET(&MF.map, ofs); \ | |
221 | flowmap_set(&MF.map, ofs, n_words); \ | |
361d808d JR |
222 | } |
223 | ||
419681da JR |
224 | /* Data at 'valuep' may be unaligned. */ |
225 | #define miniflow_push_words_(MF, OFS, VALUEP, N_WORDS) \ | |
226 | { \ | |
361d808d JR |
227 | MINIFLOW_ASSERT((OFS) % 8 == 0); \ |
228 | miniflow_set_maps(MF, (OFS) / 8, (N_WORDS)); \ | |
229 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof *MF.data); \ | |
230 | MF.data += (N_WORDS); \ | |
064af421 BP |
231 | } |
232 | ||
d70e8c28 JR |
233 | /* Push 32-bit words padded to 64-bits. */ |
234 | #define miniflow_push_words_32_(MF, OFS, VALUEP, N_WORDS) \ | |
235 | { \ | |
361d808d | 236 | miniflow_set_maps(MF, (OFS) / 8, DIV_ROUND_UP(N_WORDS, 2)); \ |
d70e8c28 JR |
237 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof(uint32_t)); \ |
238 | MF.data += DIV_ROUND_UP(N_WORDS, 2); \ | |
d70e8c28 JR |
239 | if ((N_WORDS) & 1) { \ |
240 | *((uint32_t *)MF.data - 1) = 0; \ | |
241 | } \ | |
242 | } | |
50f06e16 | 243 | |
d70e8c28 JR |
244 | /* Data at 'valuep' may be unaligned. */ |
245 | /* MACs start 64-aligned, and must be followed by other data or padding. */ | |
246 | #define miniflow_push_macs_(MF, OFS, VALUEP) \ | |
247 | { \ | |
361d808d | 248 | miniflow_set_maps(MF, (OFS) / 8, 2); \ |
d70e8c28 JR |
249 | memcpy(MF.data, (VALUEP), 2 * ETH_ADDR_LEN); \ |
250 | MF.data += 1; /* First word only. */ \ | |
d70e8c28 | 251 | } |
50f06e16 | 252 | |
d70e8c28 JR |
253 | #define miniflow_push_uint32(MF, FIELD, VALUE) \ |
254 | miniflow_push_uint32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 255 | |
d70e8c28 JR |
256 | #define miniflow_push_be32(MF, FIELD, VALUE) \ |
257 | miniflow_push_be32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 258 | |
d70e8c28 | 259 | #define miniflow_push_uint16(MF, FIELD, VALUE) \ |
419681da | 260 | miniflow_push_uint16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 261 | |
d70e8c28 | 262 | #define miniflow_push_be16(MF, FIELD, VALUE) \ |
419681da | 263 | miniflow_push_be16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 264 | |
d70e8c28 JR |
265 | #define miniflow_pad_to_64(MF, FIELD) \ |
266 | miniflow_pad_to_64_(MF, offsetof(struct flow, FIELD)) | |
267 | ||
419681da JR |
268 | #define miniflow_push_words(MF, FIELD, VALUEP, N_WORDS) \ |
269 | miniflow_push_words_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
064af421 | 270 | |
d70e8c28 JR |
271 | #define miniflow_push_words_32(MF, FIELD, VALUEP, N_WORDS) \ |
272 | miniflow_push_words_32_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
273 | ||
274 | #define miniflow_push_macs(MF, FIELD, VALUEP) \ | |
275 | miniflow_push_macs_(MF, offsetof(struct flow, FIELD), VALUEP) | |
276 | ||
419681da JR |
277 | /* Pulls the MPLS headers at '*datap' and returns the count of them. */ |
278 | static inline int | |
4c0e587c | 279 | parse_mpls(const void **datap, size_t *sizep) |
d31f1109 | 280 | { |
419681da JR |
281 | const struct mpls_hdr *mh; |
282 | int count = 0; | |
d31f1109 | 283 | |
419681da JR |
284 | while ((mh = data_try_pull(datap, sizep, sizeof *mh))) { |
285 | count++; | |
286 | if (mh->mpls_lse.lo & htons(1 << MPLS_BOS_SHIFT)) { | |
d31f1109 JP |
287 | break; |
288 | } | |
419681da | 289 | } |
ba8561c6 | 290 | return MIN(count, FLOW_MAX_MPLS_LABELS); |
419681da | 291 | } |
d31f1109 | 292 | |
419681da | 293 | static inline ovs_be16 |
4c0e587c | 294 | parse_vlan(const void **datap, size_t *sizep) |
419681da JR |
295 | { |
296 | const struct eth_header *eth = *datap; | |
d31f1109 | 297 | |
419681da JR |
298 | struct qtag_prefix { |
299 | ovs_be16 eth_type; /* ETH_TYPE_VLAN */ | |
300 | ovs_be16 tci; | |
301 | }; | |
d31f1109 | 302 | |
419681da | 303 | data_pull(datap, sizep, ETH_ADDR_LEN * 2); |
d31f1109 | 304 | |
419681da JR |
305 | if (eth->eth_type == htons(ETH_TYPE_VLAN)) { |
306 | if (OVS_LIKELY(*sizep | |
307 | >= sizeof(struct qtag_prefix) + sizeof(ovs_be16))) { | |
308 | const struct qtag_prefix *qp = data_pull(datap, sizep, sizeof *qp); | |
309 | return qp->tci | htons(VLAN_CFI); | |
d31f1109 JP |
310 | } |
311 | } | |
88366484 | 312 | return 0; |
d31f1109 JP |
313 | } |
314 | ||
419681da | 315 | static inline ovs_be16 |
4c0e587c | 316 | parse_ethertype(const void **datap, size_t *sizep) |
88366484 | 317 | { |
419681da JR |
318 | const struct llc_snap_header *llc; |
319 | ovs_be16 proto; | |
5a51b2cd | 320 | |
419681da JR |
321 | proto = *(ovs_be16 *) data_pull(datap, sizep, sizeof proto); |
322 | if (OVS_LIKELY(ntohs(proto) >= ETH_TYPE_MIN)) { | |
323 | return proto; | |
88366484 | 324 | } |
5a51b2cd | 325 | |
419681da JR |
326 | if (OVS_UNLIKELY(*sizep < sizeof *llc)) { |
327 | return htons(FLOW_DL_TYPE_NONE); | |
88366484 | 328 | } |
5a51b2cd | 329 | |
419681da JR |
330 | llc = *datap; |
331 | if (OVS_UNLIKELY(llc->llc.llc_dsap != LLC_DSAP_SNAP | |
332 | || llc->llc.llc_ssap != LLC_SSAP_SNAP | |
333 | || llc->llc.llc_cntl != LLC_CNTL_SNAP | |
334 | || memcmp(llc->snap.snap_org, SNAP_ORG_ETHERNET, | |
335 | sizeof llc->snap.snap_org))) { | |
336 | return htons(FLOW_DL_TYPE_NONE); | |
c6bcb685 | 337 | } |
c6bcb685 | 338 | |
419681da | 339 | data_pull(datap, sizep, sizeof *llc); |
685a51a5 | 340 | |
419681da JR |
341 | if (OVS_LIKELY(ntohs(llc->snap.snap_type) >= ETH_TYPE_MIN)) { |
342 | return llc->snap.snap_type; | |
685a51a5 JP |
343 | } |
344 | ||
419681da JR |
345 | return htons(FLOW_DL_TYPE_NONE); |
346 | } | |
685a51a5 | 347 | |
cc5dba2f | 348 | static inline void |
4c0e587c | 349 | parse_icmpv6(const void **datap, size_t *sizep, const struct icmp6_hdr *icmp, |
419681da | 350 | const struct in6_addr **nd_target, |
74ff3298 | 351 | struct eth_addr arp_buf[2]) |
419681da | 352 | { |
88366484 JG |
353 | if (icmp->icmp6_code == 0 && |
354 | (icmp->icmp6_type == ND_NEIGHBOR_SOLICIT || | |
355 | icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) { | |
685a51a5 | 356 | |
b0e2ec32 | 357 | *nd_target = data_try_pull(datap, sizep, sizeof **nd_target); |
419681da | 358 | if (OVS_UNLIKELY(!*nd_target)) { |
cc5dba2f | 359 | return; |
685a51a5 | 360 | } |
685a51a5 | 361 | |
419681da | 362 | while (*sizep >= 8) { |
685a51a5 JP |
363 | /* The minimum size of an option is 8 bytes, which also is |
364 | * the size of Ethernet link-layer options. */ | |
74ff3298 JR |
365 | const struct ovs_nd_opt *nd_opt = *datap; |
366 | int opt_len = nd_opt->nd_opt_len * ND_OPT_LEN; | |
88366484 | 367 | |
419681da | 368 | if (!opt_len || opt_len > *sizep) { |
cc5dba2f | 369 | return; |
685a51a5 | 370 | } |
685a51a5 JP |
371 | |
372 | /* Store the link layer address if the appropriate option is | |
373 | * provided. It is considered an error if the same link | |
374 | * layer option is specified twice. */ | |
375 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LINKADDR | |
74ff3298 | 376 | && opt_len == 8) { |
419681da | 377 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[0]))) { |
74ff3298 | 378 | arp_buf[0] = nd_opt->nd_opt_mac; |
685a51a5 JP |
379 | } else { |
380 | goto invalid; | |
381 | } | |
382 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LINKADDR | |
74ff3298 | 383 | && opt_len == 8) { |
419681da | 384 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[1]))) { |
74ff3298 | 385 | arp_buf[1] = nd_opt->nd_opt_mac; |
685a51a5 JP |
386 | } else { |
387 | goto invalid; | |
388 | } | |
389 | } | |
390 | ||
419681da | 391 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, opt_len))) { |
cc5dba2f | 392 | return; |
685a51a5 | 393 | } |
685a51a5 JP |
394 | } |
395 | } | |
396 | ||
cc5dba2f | 397 | return; |
685a51a5 JP |
398 | |
399 | invalid: | |
cc5dba2f | 400 | *nd_target = NULL; |
74ff3298 JR |
401 | arp_buf[0] = eth_addr_zero; |
402 | arp_buf[1] = eth_addr_zero; | |
685a51a5 JP |
403 | } |
404 | ||
b5e7e61a | 405 | /* Initializes 'flow' members from 'packet' and 'md' |
deedf7e7 | 406 | * |
437d0d22 JR |
407 | * Initializes 'packet' header l2 pointer to the start of the Ethernet |
408 | * header, and the layer offsets as follows: | |
ca78c6b6 | 409 | * |
437d0d22 JR |
410 | * - packet->l2_5_ofs to the start of the MPLS shim header, or UINT16_MAX |
411 | * when there is no MPLS shim header. | |
ca78c6b6 | 412 | * |
437d0d22 | 413 | * - packet->l3_ofs to just past the Ethernet header, or just past the |
ca78c6b6 | 414 | * vlan_header if one is present, to the first byte of the payload of the |
437d0d22 JR |
415 | * Ethernet frame. UINT16_MAX if the frame is too short to contain an |
416 | * Ethernet header. | |
ca78c6b6 | 417 | * |
437d0d22 JR |
418 | * - packet->l4_ofs to just past the IPv4 header, if one is present and |
419 | * has at least the content used for the fields of interest for the flow, | |
420 | * otherwise UINT16_MAX. | |
ca78c6b6 | 421 | */ |
7257b535 | 422 | void |
cf62fa4c | 423 | flow_extract(struct dp_packet *packet, struct flow *flow) |
064af421 | 424 | { |
27bbe15d JR |
425 | struct { |
426 | struct miniflow mf; | |
d70e8c28 | 427 | uint64_t buf[FLOW_U64S]; |
27bbe15d | 428 | } m; |
064af421 BP |
429 | |
430 | COVERAGE_INC(flow_extract); | |
431 | ||
cf62fa4c | 432 | miniflow_extract(packet, &m.mf); |
27bbe15d | 433 | miniflow_expand(&m.mf, flow); |
419681da | 434 | } |
296e07ac | 435 | |
27bbe15d | 436 | /* Caller is responsible for initializing 'dst' with enough storage for |
d70e8c28 | 437 | * FLOW_U64S * 8 bytes. */ |
419681da | 438 | void |
cf62fa4c | 439 | miniflow_extract(struct dp_packet *packet, struct miniflow *dst) |
419681da | 440 | { |
cf62fa4c | 441 | const struct pkt_metadata *md = &packet->md; |
4c0e587c | 442 | const void *data = dp_packet_data(packet); |
cf62fa4c | 443 | size_t size = dp_packet_size(packet); |
09b0fa9c | 444 | uint64_t *values = miniflow_values(dst); |
5fcff47b JR |
445 | struct mf_ctx mf = { FLOWMAP_EMPTY_INITIALIZER, values, |
446 | values + FLOW_U64S }; | |
4c0e587c | 447 | const char *l2; |
419681da JR |
448 | ovs_be16 dl_type; |
449 | uint8_t nw_frag, nw_tos, nw_ttl, nw_proto; | |
450 | ||
451 | /* Metadata. */ | |
cf62fa4c PS |
452 | if (md->tunnel.ip_dst) { |
453 | miniflow_push_words(mf, tunnel, &md->tunnel, | |
9ad11dbe JG |
454 | offsetof(struct flow_tnl, metadata) / |
455 | sizeof(uint64_t)); | |
6728d578 JG |
456 | |
457 | if (!(md->tunnel.flags & FLOW_TNL_F_UDPIF)) { | |
458 | if (md->tunnel.metadata.present.map) { | |
459 | miniflow_push_words(mf, tunnel.metadata, &md->tunnel.metadata, | |
460 | sizeof md->tunnel.metadata / | |
461 | sizeof(uint64_t)); | |
462 | } | |
463 | } else { | |
464 | if (md->tunnel.metadata.present.len) { | |
465 | miniflow_push_words(mf, tunnel.metadata.present, | |
466 | &md->tunnel.metadata.present, 1); | |
467 | miniflow_push_words(mf, tunnel.metadata.opts.gnv, | |
468 | md->tunnel.metadata.opts.gnv, | |
469 | DIV_ROUND_UP(md->tunnel.metadata.present.len, | |
470 | sizeof(uint64_t))); | |
471 | } | |
9ad11dbe | 472 | } |
cf62fa4c PS |
473 | } |
474 | if (md->skb_priority || md->pkt_mark) { | |
475 | miniflow_push_uint32(mf, skb_priority, md->skb_priority); | |
476 | miniflow_push_uint32(mf, pkt_mark, md->pkt_mark); | |
477 | } | |
478 | miniflow_push_uint32(mf, dp_hash, md->dp_hash); | |
479 | miniflow_push_uint32(mf, in_port, odp_to_u32(md->in_port.odp_port)); | |
480 | if (md->recirc_id) { | |
481 | miniflow_push_uint32(mf, recirc_id, md->recirc_id); | |
482 | miniflow_pad_to_64(mf, conj_id); | |
296e07ac | 483 | } |
064af421 | 484 | |
419681da JR |
485 | /* Initialize packet's layer pointer and offsets. */ |
486 | l2 = data; | |
82eb5b0a | 487 | dp_packet_reset_offsets(packet); |
064af421 | 488 | |
419681da JR |
489 | /* Must have full Ethernet header to proceed. */ |
490 | if (OVS_UNLIKELY(size < sizeof(struct eth_header))) { | |
491 | goto out; | |
492 | } else { | |
493 | ovs_be16 vlan_tci; | |
50f06e16 | 494 | |
419681da | 495 | /* Link layer. */ |
268eca11 | 496 | ASSERT_SEQUENTIAL(dl_dst, dl_src); |
d70e8c28 | 497 | miniflow_push_macs(mf, dl_dst, data); |
419681da JR |
498 | /* dl_type, vlan_tci. */ |
499 | vlan_tci = parse_vlan(&data, &size); | |
500 | dl_type = parse_ethertype(&data, &size); | |
501 | miniflow_push_be16(mf, dl_type, dl_type); | |
502 | miniflow_push_be16(mf, vlan_tci, vlan_tci); | |
50f06e16 | 503 | } |
50f06e16 | 504 | |
419681da JR |
505 | /* Parse mpls. */ |
506 | if (OVS_UNLIKELY(eth_type_mpls(dl_type))) { | |
507 | int count; | |
508 | const void *mpls = data; | |
509 | ||
510 | packet->l2_5_ofs = (char *)data - l2; | |
511 | count = parse_mpls(&data, &size); | |
d70e8c28 | 512 | miniflow_push_words_32(mf, mpls_lse, mpls, count); |
b02475c5 SH |
513 | } |
514 | ||
ad128cc1 | 515 | /* Network layer. */ |
419681da JR |
516 | packet->l3_ofs = (char *)data - l2; |
517 | ||
518 | nw_frag = 0; | |
519 | if (OVS_LIKELY(dl_type == htons(ETH_TYPE_IP))) { | |
520 | const struct ip_header *nh = data; | |
521 | int ip_len; | |
fa8d9001 | 522 | uint16_t tot_len; |
419681da JR |
523 | |
524 | if (OVS_UNLIKELY(size < IP_HEADER_LEN)) { | |
525 | goto out; | |
526 | } | |
527 | ip_len = IP_IHL(nh->ip_ihl_ver) * 4; | |
528 | ||
529 | if (OVS_UNLIKELY(ip_len < IP_HEADER_LEN)) { | |
530 | goto out; | |
531 | } | |
fa8d9001 JR |
532 | if (OVS_UNLIKELY(size < ip_len)) { |
533 | goto out; | |
534 | } | |
535 | tot_len = ntohs(nh->ip_tot_len); | |
536 | if (OVS_UNLIKELY(tot_len > size)) { | |
537 | goto out; | |
538 | } | |
539 | if (OVS_UNLIKELY(size - tot_len > UINT8_MAX)) { | |
540 | goto out; | |
541 | } | |
cf62fa4c | 542 | dp_packet_set_l2_pad_size(packet, size - tot_len); |
fa8d9001 | 543 | size = tot_len; /* Never pull padding. */ |
419681da JR |
544 | |
545 | /* Push both source and destination address at once. */ | |
d70e8c28 JR |
546 | miniflow_push_words(mf, nw_src, &nh->ip_src, 1); |
547 | ||
548 | miniflow_push_be32(mf, ipv6_label, 0); /* Padding for IPv4. */ | |
419681da JR |
549 | |
550 | nw_tos = nh->ip_tos; | |
551 | nw_ttl = nh->ip_ttl; | |
552 | nw_proto = nh->ip_proto; | |
553 | if (OVS_UNLIKELY(IP_IS_FRAGMENT(nh->ip_frag_off))) { | |
554 | nw_frag = FLOW_NW_FRAG_ANY; | |
555 | if (nh->ip_frag_off & htons(IP_FRAG_OFF_MASK)) { | |
556 | nw_frag |= FLOW_NW_FRAG_LATER; | |
557 | } | |
558 | } | |
419681da | 559 | data_pull(&data, &size, ip_len); |
419681da JR |
560 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { |
561 | const struct ovs_16aligned_ip6_hdr *nh; | |
562 | ovs_be32 tc_flow; | |
fa8d9001 | 563 | uint16_t plen; |
419681da JR |
564 | |
565 | if (OVS_UNLIKELY(size < sizeof *nh)) { | |
566 | goto out; | |
567 | } | |
568 | nh = data_pull(&data, &size, sizeof *nh); | |
569 | ||
fa8d9001 JR |
570 | plen = ntohs(nh->ip6_plen); |
571 | if (OVS_UNLIKELY(plen > size)) { | |
572 | goto out; | |
573 | } | |
574 | /* Jumbo Payload option not supported yet. */ | |
575 | if (OVS_UNLIKELY(size - plen > UINT8_MAX)) { | |
576 | goto out; | |
577 | } | |
cf62fa4c | 578 | dp_packet_set_l2_pad_size(packet, size - plen); |
fa8d9001 JR |
579 | size = plen; /* Never pull padding. */ |
580 | ||
419681da | 581 | miniflow_push_words(mf, ipv6_src, &nh->ip6_src, |
d70e8c28 | 582 | sizeof nh->ip6_src / 8); |
419681da | 583 | miniflow_push_words(mf, ipv6_dst, &nh->ip6_dst, |
d70e8c28 | 584 | sizeof nh->ip6_dst / 8); |
419681da JR |
585 | |
586 | tc_flow = get_16aligned_be32(&nh->ip6_flow); | |
587 | { | |
588 | ovs_be32 label = tc_flow & htonl(IPV6_LABEL_MASK); | |
d70e8c28 | 589 | miniflow_push_be32(mf, ipv6_label, label); |
419681da JR |
590 | } |
591 | ||
592 | nw_tos = ntohl(tc_flow) >> 20; | |
593 | nw_ttl = nh->ip6_hlim; | |
594 | nw_proto = nh->ip6_nxt; | |
595 | ||
596 | while (1) { | |
597 | if (OVS_LIKELY((nw_proto != IPPROTO_HOPOPTS) | |
598 | && (nw_proto != IPPROTO_ROUTING) | |
599 | && (nw_proto != IPPROTO_DSTOPTS) | |
600 | && (nw_proto != IPPROTO_AH) | |
601 | && (nw_proto != IPPROTO_FRAGMENT))) { | |
602 | /* It's either a terminal header (e.g., TCP, UDP) or one we | |
603 | * don't understand. In either case, we're done with the | |
604 | * packet, so use it to fill in 'nw_proto'. */ | |
605 | break; | |
606 | } | |
607 | ||
608 | /* We only verify that at least 8 bytes of the next header are | |
609 | * available, but many of these headers are longer. Ensure that | |
610 | * accesses within the extension header are within those first 8 | |
611 | * bytes. All extension headers are required to be at least 8 | |
612 | * bytes. */ | |
613 | if (OVS_UNLIKELY(size < 8)) { | |
614 | goto out; | |
7257b535 | 615 | } |
419681da JR |
616 | |
617 | if ((nw_proto == IPPROTO_HOPOPTS) | |
618 | || (nw_proto == IPPROTO_ROUTING) | |
619 | || (nw_proto == IPPROTO_DSTOPTS)) { | |
620 | /* These headers, while different, have the fields we care | |
621 | * about in the same location and with the same | |
622 | * interpretation. */ | |
623 | const struct ip6_ext *ext_hdr = data; | |
624 | nw_proto = ext_hdr->ip6e_nxt; | |
625 | if (OVS_UNLIKELY(!data_try_pull(&data, &size, | |
626 | (ext_hdr->ip6e_len + 1) * 8))) { | |
627 | goto out; | |
628 | } | |
629 | } else if (nw_proto == IPPROTO_AH) { | |
630 | /* A standard AH definition isn't available, but the fields | |
631 | * we care about are in the same location as the generic | |
632 | * option header--only the header length is calculated | |
633 | * differently. */ | |
634 | const struct ip6_ext *ext_hdr = data; | |
635 | nw_proto = ext_hdr->ip6e_nxt; | |
636 | if (OVS_UNLIKELY(!data_try_pull(&data, &size, | |
637 | (ext_hdr->ip6e_len + 2) * 4))) { | |
638 | goto out; | |
639 | } | |
640 | } else if (nw_proto == IPPROTO_FRAGMENT) { | |
641 | const struct ovs_16aligned_ip6_frag *frag_hdr = data; | |
642 | ||
643 | nw_proto = frag_hdr->ip6f_nxt; | |
644 | if (!data_try_pull(&data, &size, sizeof *frag_hdr)) { | |
645 | goto out; | |
646 | } | |
647 | ||
648 | /* We only process the first fragment. */ | |
649 | if (frag_hdr->ip6f_offlg != htons(0)) { | |
650 | nw_frag = FLOW_NW_FRAG_ANY; | |
651 | if ((frag_hdr->ip6f_offlg & IP6F_OFF_MASK) != htons(0)) { | |
652 | nw_frag |= FLOW_NW_FRAG_LATER; | |
653 | nw_proto = IPPROTO_FRAGMENT; | |
654 | break; | |
064af421 | 655 | } |
064af421 | 656 | } |
50f06e16 BP |
657 | } |
658 | } | |
419681da JR |
659 | } else { |
660 | if (dl_type == htons(ETH_TYPE_ARP) || | |
661 | dl_type == htons(ETH_TYPE_RARP)) { | |
74ff3298 | 662 | struct eth_addr arp_buf[2]; |
419681da JR |
663 | const struct arp_eth_header *arp = (const struct arp_eth_header *) |
664 | data_try_pull(&data, &size, ARP_ETH_HEADER_LEN); | |
665 | ||
666 | if (OVS_LIKELY(arp) && OVS_LIKELY(arp->ar_hrd == htons(1)) | |
667 | && OVS_LIKELY(arp->ar_pro == htons(ETH_TYPE_IP)) | |
668 | && OVS_LIKELY(arp->ar_hln == ETH_ADDR_LEN) | |
669 | && OVS_LIKELY(arp->ar_pln == 4)) { | |
d70e8c28 JR |
670 | miniflow_push_be32(mf, nw_src, |
671 | get_16aligned_be32(&arp->ar_spa)); | |
672 | miniflow_push_be32(mf, nw_dst, | |
673 | get_16aligned_be32(&arp->ar_tpa)); | |
419681da JR |
674 | |
675 | /* We only match on the lower 8 bits of the opcode. */ | |
676 | if (OVS_LIKELY(ntohs(arp->ar_op) <= 0xff)) { | |
d70e8c28 | 677 | miniflow_push_be32(mf, ipv6_label, 0); /* Pad with ARP. */ |
419681da JR |
678 | miniflow_push_be32(mf, nw_frag, htonl(ntohs(arp->ar_op))); |
679 | } | |
d31f1109 | 680 | |
419681da | 681 | /* Must be adjacent. */ |
268eca11 | 682 | ASSERT_SEQUENTIAL(arp_sha, arp_tha); |
419681da | 683 | |
74ff3298 JR |
684 | arp_buf[0] = arp->ar_sha; |
685 | arp_buf[1] = arp->ar_tha; | |
d70e8c28 JR |
686 | miniflow_push_macs(mf, arp_sha, arp_buf); |
687 | miniflow_pad_to_64(mf, tcp_flags); | |
419681da | 688 | } |
d31f1109 | 689 | } |
419681da JR |
690 | goto out; |
691 | } | |
692 | ||
693 | packet->l4_ofs = (char *)data - l2; | |
694 | miniflow_push_be32(mf, nw_frag, | |
695 | BYTES_TO_BE32(nw_frag, nw_tos, nw_ttl, nw_proto)); | |
696 | ||
697 | if (OVS_LIKELY(!(nw_frag & FLOW_NW_FRAG_LATER))) { | |
698 | if (OVS_LIKELY(nw_proto == IPPROTO_TCP)) { | |
699 | if (OVS_LIKELY(size >= TCP_HEADER_LEN)) { | |
700 | const struct tcp_header *tcp = data; | |
701 | ||
74ff3298 | 702 | miniflow_push_be32(mf, arp_tha.ea[2], 0); |
419681da JR |
703 | miniflow_push_be32(mf, tcp_flags, |
704 | TCP_FLAGS_BE32(tcp->tcp_ctl)); | |
115f2481 JR |
705 | miniflow_push_be16(mf, tp_src, tcp->tcp_src); |
706 | miniflow_push_be16(mf, tp_dst, tcp->tcp_dst); | |
d70e8c28 | 707 | miniflow_pad_to_64(mf, igmp_group_ip4); |
419681da JR |
708 | } |
709 | } else if (OVS_LIKELY(nw_proto == IPPROTO_UDP)) { | |
710 | if (OVS_LIKELY(size >= UDP_HEADER_LEN)) { | |
711 | const struct udp_header *udp = data; | |
712 | ||
115f2481 JR |
713 | miniflow_push_be16(mf, tp_src, udp->udp_src); |
714 | miniflow_push_be16(mf, tp_dst, udp->udp_dst); | |
d70e8c28 | 715 | miniflow_pad_to_64(mf, igmp_group_ip4); |
064af421 | 716 | } |
419681da JR |
717 | } else if (OVS_LIKELY(nw_proto == IPPROTO_SCTP)) { |
718 | if (OVS_LIKELY(size >= SCTP_HEADER_LEN)) { | |
719 | const struct sctp_header *sctp = data; | |
a26ef517 | 720 | |
115f2481 JR |
721 | miniflow_push_be16(mf, tp_src, sctp->sctp_src); |
722 | miniflow_push_be16(mf, tp_dst, sctp->sctp_dst); | |
d70e8c28 | 723 | miniflow_pad_to_64(mf, igmp_group_ip4); |
419681da JR |
724 | } |
725 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMP)) { | |
726 | if (OVS_LIKELY(size >= ICMP_HEADER_LEN)) { | |
727 | const struct icmp_header *icmp = data; | |
728 | ||
729 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp_type)); | |
730 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp_code)); | |
d70e8c28 | 731 | miniflow_pad_to_64(mf, igmp_group_ip4); |
419681da | 732 | } |
0e612675 FL |
733 | } else if (OVS_LIKELY(nw_proto == IPPROTO_IGMP)) { |
734 | if (OVS_LIKELY(size >= IGMP_HEADER_LEN)) { | |
735 | const struct igmp_header *igmp = data; | |
736 | ||
737 | miniflow_push_be16(mf, tp_src, htons(igmp->igmp_type)); | |
738 | miniflow_push_be16(mf, tp_dst, htons(igmp->igmp_code)); | |
739 | miniflow_push_be32(mf, igmp_group_ip4, | |
740 | get_16aligned_be32(&igmp->group)); | |
741 | } | |
419681da JR |
742 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMPV6)) { |
743 | if (OVS_LIKELY(size >= sizeof(struct icmp6_hdr))) { | |
744 | const struct in6_addr *nd_target = NULL; | |
74ff3298 | 745 | struct eth_addr arp_buf[2] = { }; |
419681da JR |
746 | const struct icmp6_hdr *icmp = data_pull(&data, &size, |
747 | sizeof *icmp); | |
cc5dba2f SH |
748 | parse_icmpv6(&data, &size, icmp, &nd_target, arp_buf); |
749 | if (nd_target) { | |
750 | miniflow_push_words(mf, nd_target, nd_target, | |
74ff3298 | 751 | sizeof *nd_target / sizeof(uint64_t)); |
419681da | 752 | } |
cc5dba2f SH |
753 | miniflow_push_macs(mf, arp_sha, arp_buf); |
754 | miniflow_pad_to_64(mf, tcp_flags); | |
755 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp6_type)); | |
756 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp6_code)); | |
757 | miniflow_pad_to_64(mf, igmp_group_ip4); | |
419681da | 758 | } |
064af421 BP |
759 | } |
760 | } | |
419681da | 761 | out: |
5fcff47b | 762 | dst->map = mf.map; |
064af421 BP |
763 | } |
764 | ||
993410fb BP |
765 | /* For every bit of a field that is wildcarded in 'wildcards', sets the |
766 | * corresponding bit in 'flow' to zero. */ | |
767 | void | |
768 | flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards) | |
769 | { | |
d70e8c28 JR |
770 | uint64_t *flow_u64 = (uint64_t *) flow; |
771 | const uint64_t *wc_u64 = (const uint64_t *) &wildcards->masks; | |
659c2346 | 772 | size_t i; |
993410fb | 773 | |
d70e8c28 JR |
774 | for (i = 0; i < FLOW_U64S; i++) { |
775 | flow_u64[i] &= wc_u64[i]; | |
26720e24 | 776 | } |
993410fb BP |
777 | } |
778 | ||
d8d9c698 EJ |
779 | void |
780 | flow_unwildcard_tp_ports(const struct flow *flow, struct flow_wildcards *wc) | |
781 | { | |
782 | if (flow->nw_proto != IPPROTO_ICMP) { | |
783 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
784 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
785 | } else { | |
786 | wc->masks.tp_src = htons(0xff); | |
787 | wc->masks.tp_dst = htons(0xff); | |
788 | } | |
789 | } | |
790 | ||
50dcbd8e | 791 | /* Initializes 'flow_metadata' with the metadata found in 'flow'. */ |
5d6c3af0 | 792 | void |
50dcbd8e | 793 | flow_get_metadata(const struct flow *flow, struct match *flow_metadata) |
5d6c3af0 | 794 | { |
50dcbd8e JG |
795 | int i; |
796 | ||
b666962b | 797 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 33); |
e9358af6 | 798 | |
50dcbd8e JG |
799 | match_init_catchall(flow_metadata); |
800 | if (flow->tunnel.tun_id != htonll(0)) { | |
801 | match_set_tun_id(flow_metadata, flow->tunnel.tun_id); | |
802 | } | |
b666962b JG |
803 | if (flow->tunnel.flags & FLOW_TNL_PUB_F_MASK) { |
804 | match_set_tun_flags(flow_metadata, | |
805 | flow->tunnel.flags & FLOW_TNL_PUB_F_MASK); | |
806 | } | |
50dcbd8e JG |
807 | if (flow->tunnel.ip_src != htonl(0)) { |
808 | match_set_tun_src(flow_metadata, flow->tunnel.ip_src); | |
809 | } | |
810 | if (flow->tunnel.ip_dst != htonl(0)) { | |
811 | match_set_tun_dst(flow_metadata, flow->tunnel.ip_dst); | |
812 | } | |
813 | if (flow->tunnel.gbp_id != htons(0)) { | |
814 | match_set_tun_gbp_id(flow_metadata, flow->tunnel.gbp_id); | |
815 | } | |
816 | if (flow->tunnel.gbp_flags) { | |
817 | match_set_tun_gbp_flags(flow_metadata, flow->tunnel.gbp_flags); | |
818 | } | |
6728d578 | 819 | tun_metadata_get_fmd(&flow->tunnel, flow_metadata); |
50dcbd8e JG |
820 | if (flow->metadata != htonll(0)) { |
821 | match_set_metadata(flow_metadata, flow->metadata); | |
822 | } | |
823 | ||
824 | for (i = 0; i < FLOW_N_REGS; i++) { | |
825 | if (flow->regs[i]) { | |
826 | match_set_reg(flow_metadata, i, flow->regs[i]); | |
827 | } | |
828 | } | |
829 | ||
830 | if (flow->pkt_mark != 0) { | |
831 | match_set_pkt_mark(flow_metadata, flow->pkt_mark); | |
832 | } | |
833 | ||
834 | match_set_in_port(flow_metadata, flow->in_port.ofp_port); | |
5d6c3af0 EJ |
835 | } |
836 | ||
064af421 | 837 | char * |
ae412e7d | 838 | flow_to_string(const struct flow *flow) |
064af421 BP |
839 | { |
840 | struct ds ds = DS_EMPTY_INITIALIZER; | |
841 | flow_format(&ds, flow); | |
842 | return ds_cstr(&ds); | |
843 | } | |
844 | ||
4fe3445a PS |
845 | const char * |
846 | flow_tun_flag_to_string(uint32_t flags) | |
847 | { | |
848 | switch (flags) { | |
849 | case FLOW_TNL_F_DONT_FRAGMENT: | |
850 | return "df"; | |
851 | case FLOW_TNL_F_CSUM: | |
852 | return "csum"; | |
853 | case FLOW_TNL_F_KEY: | |
854 | return "key"; | |
94872594 JG |
855 | case FLOW_TNL_F_OAM: |
856 | return "oam"; | |
4fe3445a PS |
857 | default: |
858 | return NULL; | |
859 | } | |
860 | } | |
861 | ||
862 | void | |
863 | format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t), | |
864 | uint32_t flags, char del) | |
865 | { | |
866 | uint32_t bad = 0; | |
867 | ||
868 | if (!flags) { | |
8e4c1621 | 869 | ds_put_char(ds, '0'); |
4fe3445a PS |
870 | return; |
871 | } | |
872 | while (flags) { | |
873 | uint32_t bit = rightmost_1bit(flags); | |
874 | const char *s; | |
875 | ||
876 | s = bit_to_string(bit); | |
877 | if (s) { | |
878 | ds_put_format(ds, "%s%c", s, del); | |
879 | } else { | |
880 | bad |= bit; | |
881 | } | |
882 | ||
883 | flags &= ~bit; | |
884 | } | |
885 | ||
886 | if (bad) { | |
887 | ds_put_format(ds, "0x%"PRIx32"%c", bad, del); | |
888 | } | |
889 | ds_chomp(ds, del); | |
890 | } | |
891 | ||
61bf6666 JR |
892 | void |
893 | format_flags_masked(struct ds *ds, const char *name, | |
894 | const char *(*bit_to_string)(uint32_t), uint32_t flags, | |
8e4c1621 | 895 | uint32_t mask, uint32_t max_mask) |
61bf6666 JR |
896 | { |
897 | if (name) { | |
898 | ds_put_format(ds, "%s=", name); | |
899 | } | |
8e4c1621 JG |
900 | |
901 | if (mask == max_mask) { | |
902 | format_flags(ds, bit_to_string, flags, '|'); | |
903 | return; | |
904 | } | |
905 | ||
906 | if (!mask) { | |
907 | ds_put_cstr(ds, "0/0"); | |
908 | return; | |
909 | } | |
910 | ||
61bf6666 JR |
911 | while (mask) { |
912 | uint32_t bit = rightmost_1bit(mask); | |
913 | const char *s = bit_to_string(bit); | |
914 | ||
915 | ds_put_format(ds, "%s%s", (flags & bit) ? "+" : "-", | |
916 | s ? s : "[Unknown]"); | |
917 | mask &= ~bit; | |
918 | } | |
919 | } | |
920 | ||
8e4c1621 JG |
921 | /* Scans a string 's' of flags to determine their numerical value and |
922 | * returns the number of characters parsed using 'bit_to_string' to | |
923 | * lookup flag names. Scanning continues until the character 'end' is | |
924 | * reached. | |
925 | * | |
926 | * In the event of a failure, a negative error code will be returned. In | |
927 | * addition, if 'res_string' is non-NULL then a descriptive string will | |
928 | * be returned incorporating the identifying string 'field_name'. This | |
929 | * error string must be freed by the caller. | |
930 | * | |
931 | * Upon success, the flag values will be stored in 'res_flags' and | |
932 | * optionally 'res_mask', if it is non-NULL (if it is NULL then any masks | |
933 | * present in the original string will be considered an error). The | |
934 | * caller may restrict the acceptable set of values through the mask | |
935 | * 'allowed'. */ | |
936 | int | |
937 | parse_flags(const char *s, const char *(*bit_to_string)(uint32_t), | |
938 | char end, const char *field_name, char **res_string, | |
939 | uint32_t *res_flags, uint32_t allowed, uint32_t *res_mask) | |
940 | { | |
941 | uint32_t result = 0; | |
942 | int n; | |
943 | ||
944 | /* Parse masked flags in numeric format? */ | |
945 | if (res_mask && ovs_scan(s, "%"SCNi32"/%"SCNi32"%n", | |
946 | res_flags, res_mask, &n) && n > 0) { | |
947 | if (*res_flags & ~allowed || *res_mask & ~allowed) { | |
948 | goto unknown; | |
949 | } | |
950 | return n; | |
951 | } | |
952 | ||
953 | n = 0; | |
954 | ||
955 | if (res_mask && (*s == '+' || *s == '-')) { | |
956 | uint32_t flags = 0, mask = 0; | |
957 | ||
958 | /* Parse masked flags. */ | |
959 | while (s[0] != end) { | |
960 | bool set; | |
961 | uint32_t bit; | |
962 | size_t len; | |
963 | ||
964 | if (s[0] == '+') { | |
965 | set = true; | |
966 | } else if (s[0] == '-') { | |
967 | set = false; | |
968 | } else { | |
969 | if (res_string) { | |
970 | *res_string = xasprintf("%s: %s must be preceded by '+' " | |
971 | "(for SET) or '-' (NOT SET)", s, | |
972 | field_name); | |
973 | } | |
974 | return -EINVAL; | |
975 | } | |
976 | s++; | |
977 | n++; | |
978 | ||
979 | for (bit = 1; bit; bit <<= 1) { | |
980 | const char *fname = bit_to_string(bit); | |
981 | ||
982 | if (!fname) { | |
983 | continue; | |
984 | } | |
985 | ||
986 | len = strlen(fname); | |
987 | if (strncmp(s, fname, len) || | |
988 | (s[len] != '+' && s[len] != '-' && s[len] != end)) { | |
989 | continue; | |
990 | } | |
991 | ||
992 | if (mask & bit) { | |
993 | /* bit already set. */ | |
994 | if (res_string) { | |
995 | *res_string = xasprintf("%s: Each %s flag can be " | |
996 | "specified only once", s, | |
997 | field_name); | |
998 | } | |
999 | return -EINVAL; | |
1000 | } | |
1001 | if (!(bit & allowed)) { | |
1002 | goto unknown; | |
1003 | } | |
1004 | if (set) { | |
1005 | flags |= bit; | |
1006 | } | |
1007 | mask |= bit; | |
1008 | break; | |
1009 | } | |
1010 | ||
1011 | if (!bit) { | |
1012 | goto unknown; | |
1013 | } | |
1014 | s += len; | |
1015 | n += len; | |
1016 | } | |
1017 | ||
1018 | *res_flags = flags; | |
1019 | *res_mask = mask; | |
1020 | return n; | |
1021 | } | |
1022 | ||
1023 | /* Parse unmasked flags. If a flag is present, it is set, otherwise | |
1024 | * it is not set. */ | |
1025 | while (s[n] != end) { | |
1026 | unsigned long long int flags; | |
1027 | uint32_t bit; | |
1028 | int n0; | |
1029 | ||
1030 | if (ovs_scan(&s[n], "%lli%n", &flags, &n0)) { | |
1031 | if (flags & ~allowed) { | |
1032 | goto unknown; | |
1033 | } | |
1034 | n += n0 + (s[n + n0] == '|'); | |
1035 | result |= flags; | |
1036 | continue; | |
1037 | } | |
1038 | ||
1039 | for (bit = 1; bit; bit <<= 1) { | |
1040 | const char *name = bit_to_string(bit); | |
1041 | size_t len; | |
1042 | ||
1043 | if (!name) { | |
1044 | continue; | |
1045 | } | |
1046 | ||
1047 | len = strlen(name); | |
1048 | if (!strncmp(s + n, name, len) && | |
1049 | (s[n + len] == '|' || s[n + len] == end)) { | |
1050 | if (!(bit & allowed)) { | |
1051 | goto unknown; | |
1052 | } | |
1053 | result |= bit; | |
1054 | n += len + (s[n + len] == '|'); | |
1055 | break; | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | if (!bit) { | |
1060 | goto unknown; | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | *res_flags = result; | |
1065 | if (res_mask) { | |
1066 | *res_mask = UINT32_MAX; | |
1067 | } | |
1068 | if (res_string) { | |
1069 | *res_string = NULL; | |
1070 | } | |
1071 | return n; | |
1072 | ||
1073 | unknown: | |
1074 | if (res_string) { | |
1075 | *res_string = xasprintf("%s: unknown %s flag(s)", s, field_name); | |
1076 | } | |
1077 | return -EINVAL; | |
1078 | } | |
1079 | ||
064af421 | 1080 | void |
ae412e7d | 1081 | flow_format(struct ds *ds, const struct flow *flow) |
064af421 | 1082 | { |
aa6c9932 | 1083 | struct match match; |
78c9486d | 1084 | struct flow_wildcards *wc = &match.wc; |
296e07ac | 1085 | |
aa6c9932 | 1086 | match_wc_init(&match, flow); |
78c9486d JR |
1087 | |
1088 | /* As this function is most often used for formatting a packet in a | |
1089 | * packet-in message, skip formatting the packet context fields that are | |
e6d9ab56 JR |
1090 | * all-zeroes to make the print-out easier on the eyes. This means that a |
1091 | * missing context field implies a zero value for that field. This is | |
1092 | * similar to OpenFlow encoding of these fields, as the specification | |
1093 | * states that all-zeroes context fields should not be encoded in the | |
1094 | * packet-in messages. */ | |
1095 | if (!flow->in_port.ofp_port) { | |
1096 | WC_UNMASK_FIELD(wc, in_port); | |
1097 | } | |
78c9486d JR |
1098 | if (!flow->skb_priority) { |
1099 | WC_UNMASK_FIELD(wc, skb_priority); | |
1100 | } | |
1101 | if (!flow->pkt_mark) { | |
1102 | WC_UNMASK_FIELD(wc, pkt_mark); | |
1103 | } | |
1104 | if (!flow->recirc_id) { | |
1105 | WC_UNMASK_FIELD(wc, recirc_id); | |
1106 | } | |
330de069 JR |
1107 | if (!flow->dp_hash) { |
1108 | WC_UNMASK_FIELD(wc, dp_hash); | |
1109 | } | |
78c9486d JR |
1110 | for (int i = 0; i < FLOW_N_REGS; i++) { |
1111 | if (!flow->regs[i]) { | |
1112 | WC_UNMASK_FIELD(wc, regs[i]); | |
1113 | } | |
1114 | } | |
1115 | if (!flow->metadata) { | |
1116 | WC_UNMASK_FIELD(wc, metadata); | |
1117 | } | |
1118 | ||
3f78c3cc | 1119 | match_format(&match, ds, OFP_DEFAULT_PRIORITY); |
064af421 BP |
1120 | } |
1121 | ||
1122 | void | |
ae412e7d | 1123 | flow_print(FILE *stream, const struct flow *flow) |
064af421 BP |
1124 | { |
1125 | char *s = flow_to_string(flow); | |
1126 | fputs(s, stream); | |
1127 | free(s); | |
1128 | } | |
54363004 BP |
1129 | \f |
1130 | /* flow_wildcards functions. */ | |
1131 | ||
d8ae4d67 | 1132 | /* Initializes 'wc' as a set of wildcards that matches every packet. */ |
54363004 | 1133 | void |
d8ae4d67 | 1134 | flow_wildcards_init_catchall(struct flow_wildcards *wc) |
54363004 | 1135 | { |
659c2346 | 1136 | memset(&wc->masks, 0, sizeof wc->masks); |
54363004 BP |
1137 | } |
1138 | ||
78c9486d JR |
1139 | /* Converts a flow into flow wildcards. It sets the wildcard masks based on |
1140 | * the packet headers extracted to 'flow'. It will not set the mask for fields | |
1141 | * that do not make sense for the packet type. OpenFlow-only metadata is | |
1142 | * wildcarded, but other metadata is unconditionally exact-matched. */ | |
1143 | void flow_wildcards_init_for_packet(struct flow_wildcards *wc, | |
1144 | const struct flow *flow) | |
1145 | { | |
1146 | memset(&wc->masks, 0x0, sizeof wc->masks); | |
1147 | ||
0de8783a | 1148 | /* Update this function whenever struct flow changes. */ |
b666962b | 1149 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 33); |
0de8783a | 1150 | |
78c9486d JR |
1151 | if (flow->tunnel.ip_dst) { |
1152 | if (flow->tunnel.flags & FLOW_TNL_F_KEY) { | |
1153 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1154 | } | |
1155 | WC_MASK_FIELD(wc, tunnel.ip_src); | |
1156 | WC_MASK_FIELD(wc, tunnel.ip_dst); | |
1157 | WC_MASK_FIELD(wc, tunnel.flags); | |
1158 | WC_MASK_FIELD(wc, tunnel.ip_tos); | |
1159 | WC_MASK_FIELD(wc, tunnel.ip_ttl); | |
1160 | WC_MASK_FIELD(wc, tunnel.tp_src); | |
1161 | WC_MASK_FIELD(wc, tunnel.tp_dst); | |
ac6073e3 MC |
1162 | WC_MASK_FIELD(wc, tunnel.gbp_id); |
1163 | WC_MASK_FIELD(wc, tunnel.gbp_flags); | |
9558d2a5 | 1164 | |
6728d578 JG |
1165 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1166 | if (flow->tunnel.metadata.present.map) { | |
1167 | wc->masks.tunnel.metadata.present.map = | |
1168 | flow->tunnel.metadata.present.map; | |
1169 | WC_MASK_FIELD(wc, tunnel.metadata.opts.u8); | |
1170 | } | |
1171 | } else { | |
1172 | WC_MASK_FIELD(wc, tunnel.metadata.present.len); | |
1173 | memset(wc->masks.tunnel.metadata.opts.gnv, 0xff, | |
1174 | flow->tunnel.metadata.present.len); | |
9558d2a5 | 1175 | } |
78c9486d JR |
1176 | } else if (flow->tunnel.tun_id) { |
1177 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1178 | } | |
1179 | ||
18080541 | 1180 | /* metadata, regs, and conj_id wildcarded. */ |
78c9486d JR |
1181 | |
1182 | WC_MASK_FIELD(wc, skb_priority); | |
1183 | WC_MASK_FIELD(wc, pkt_mark); | |
1184 | WC_MASK_FIELD(wc, recirc_id); | |
1185 | WC_MASK_FIELD(wc, dp_hash); | |
1186 | WC_MASK_FIELD(wc, in_port); | |
1187 | ||
c61f3870 BP |
1188 | /* actset_output wildcarded. */ |
1189 | ||
78c9486d JR |
1190 | WC_MASK_FIELD(wc, dl_dst); |
1191 | WC_MASK_FIELD(wc, dl_src); | |
1192 | WC_MASK_FIELD(wc, dl_type); | |
1193 | WC_MASK_FIELD(wc, vlan_tci); | |
1194 | ||
1195 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1196 | WC_MASK_FIELD(wc, nw_src); | |
1197 | WC_MASK_FIELD(wc, nw_dst); | |
1198 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1199 | WC_MASK_FIELD(wc, ipv6_src); | |
1200 | WC_MASK_FIELD(wc, ipv6_dst); | |
1201 | WC_MASK_FIELD(wc, ipv6_label); | |
1202 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || | |
1203 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
1204 | WC_MASK_FIELD(wc, nw_src); | |
1205 | WC_MASK_FIELD(wc, nw_dst); | |
1206 | WC_MASK_FIELD(wc, nw_proto); | |
1207 | WC_MASK_FIELD(wc, arp_sha); | |
1208 | WC_MASK_FIELD(wc, arp_tha); | |
1209 | return; | |
1210 | } else if (eth_type_mpls(flow->dl_type)) { | |
1211 | for (int i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { | |
1212 | WC_MASK_FIELD(wc, mpls_lse[i]); | |
1213 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
1214 | break; | |
1215 | } | |
1216 | } | |
1217 | return; | |
1218 | } else { | |
1219 | return; /* Unknown ethertype. */ | |
1220 | } | |
1221 | ||
1222 | /* IPv4 or IPv6. */ | |
1223 | WC_MASK_FIELD(wc, nw_frag); | |
1224 | WC_MASK_FIELD(wc, nw_tos); | |
1225 | WC_MASK_FIELD(wc, nw_ttl); | |
1226 | WC_MASK_FIELD(wc, nw_proto); | |
1227 | ||
1228 | /* No transport layer header in later fragments. */ | |
1229 | if (!(flow->nw_frag & FLOW_NW_FRAG_LATER) && | |
1230 | (flow->nw_proto == IPPROTO_ICMP || | |
1231 | flow->nw_proto == IPPROTO_ICMPV6 || | |
1232 | flow->nw_proto == IPPROTO_TCP || | |
1233 | flow->nw_proto == IPPROTO_UDP || | |
1234 | flow->nw_proto == IPPROTO_SCTP || | |
1235 | flow->nw_proto == IPPROTO_IGMP)) { | |
1236 | WC_MASK_FIELD(wc, tp_src); | |
1237 | WC_MASK_FIELD(wc, tp_dst); | |
1238 | ||
1239 | if (flow->nw_proto == IPPROTO_TCP) { | |
1240 | WC_MASK_FIELD(wc, tcp_flags); | |
1241 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { | |
1242 | WC_MASK_FIELD(wc, arp_sha); | |
1243 | WC_MASK_FIELD(wc, arp_tha); | |
1244 | WC_MASK_FIELD(wc, nd_target); | |
1245 | } else if (flow->nw_proto == IPPROTO_IGMP) { | |
1246 | WC_MASK_FIELD(wc, igmp_group_ip4); | |
1247 | } | |
1248 | } | |
1249 | } | |
1250 | ||
0de8783a JR |
1251 | /* Return a map of possible fields for a packet of the same type as 'flow'. |
1252 | * Including extra bits in the returned mask is not wrong, it is just less | |
1253 | * optimal. | |
1254 | * | |
1255 | * This is a less precise version of flow_wildcards_init_for_packet() above. */ | |
361d808d | 1256 | void |
5fcff47b | 1257 | flow_wc_map(const struct flow *flow, struct flowmap *map) |
0de8783a JR |
1258 | { |
1259 | /* Update this function whenever struct flow changes. */ | |
b666962b | 1260 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 33); |
0de8783a | 1261 | |
5fcff47b JR |
1262 | flowmap_init(map); |
1263 | ||
361d808d | 1264 | if (flow->tunnel.ip_dst) { |
5fcff47b | 1265 | FLOWMAP_SET__(map, tunnel, offsetof(struct flow_tnl, metadata)); |
6728d578 JG |
1266 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1267 | if (flow->tunnel.metadata.present.map) { | |
5fcff47b | 1268 | FLOWMAP_SET(map, tunnel.metadata); |
6728d578 JG |
1269 | } |
1270 | } else { | |
5fcff47b JR |
1271 | FLOWMAP_SET(map, tunnel.metadata.present.len); |
1272 | FLOWMAP_SET__(map, tunnel.metadata.opts.gnv, | |
1273 | flow->tunnel.metadata.present.len); | |
361d808d JR |
1274 | } |
1275 | } | |
0de8783a JR |
1276 | |
1277 | /* Metadata fields that can appear on packet input. */ | |
5fcff47b JR |
1278 | FLOWMAP_SET(map, skb_priority); |
1279 | FLOWMAP_SET(map, pkt_mark); | |
1280 | FLOWMAP_SET(map, recirc_id); | |
1281 | FLOWMAP_SET(map, dp_hash); | |
1282 | FLOWMAP_SET(map, in_port); | |
1283 | FLOWMAP_SET(map, dl_dst); | |
1284 | FLOWMAP_SET(map, dl_src); | |
1285 | FLOWMAP_SET(map, dl_type); | |
1286 | FLOWMAP_SET(map, vlan_tci); | |
0de8783a JR |
1287 | |
1288 | /* Ethertype-dependent fields. */ | |
1289 | if (OVS_LIKELY(flow->dl_type == htons(ETH_TYPE_IP))) { | |
5fcff47b JR |
1290 | FLOWMAP_SET(map, nw_src); |
1291 | FLOWMAP_SET(map, nw_dst); | |
1292 | FLOWMAP_SET(map, nw_proto); | |
1293 | FLOWMAP_SET(map, nw_frag); | |
1294 | FLOWMAP_SET(map, nw_tos); | |
1295 | FLOWMAP_SET(map, nw_ttl); | |
1296 | ||
0de8783a | 1297 | if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_IGMP)) { |
5fcff47b | 1298 | FLOWMAP_SET(map, igmp_group_ip4); |
0de8783a | 1299 | } else { |
5fcff47b JR |
1300 | FLOWMAP_SET(map, tcp_flags); |
1301 | FLOWMAP_SET(map, tp_src); | |
1302 | FLOWMAP_SET(map, tp_dst); | |
0de8783a JR |
1303 | } |
1304 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
5fcff47b JR |
1305 | FLOWMAP_SET(map, ipv6_src); |
1306 | FLOWMAP_SET(map, ipv6_dst); | |
1307 | FLOWMAP_SET(map, ipv6_label); | |
1308 | FLOWMAP_SET(map, nw_proto); | |
1309 | FLOWMAP_SET(map, nw_frag); | |
1310 | FLOWMAP_SET(map, nw_tos); | |
1311 | FLOWMAP_SET(map, nw_ttl); | |
1312 | ||
0de8783a | 1313 | if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_ICMPV6)) { |
5fcff47b JR |
1314 | FLOWMAP_SET(map, nd_target); |
1315 | FLOWMAP_SET(map, arp_sha); | |
1316 | FLOWMAP_SET(map, arp_tha); | |
0de8783a | 1317 | } else { |
5fcff47b JR |
1318 | FLOWMAP_SET(map, tcp_flags); |
1319 | FLOWMAP_SET(map, tp_src); | |
1320 | FLOWMAP_SET(map, tp_dst); | |
0de8783a JR |
1321 | } |
1322 | } else if (eth_type_mpls(flow->dl_type)) { | |
5fcff47b | 1323 | FLOWMAP_SET(map, mpls_lse); |
0de8783a JR |
1324 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
1325 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
5fcff47b JR |
1326 | FLOWMAP_SET(map, nw_src); |
1327 | FLOWMAP_SET(map, nw_dst); | |
1328 | FLOWMAP_SET(map, nw_proto); | |
1329 | FLOWMAP_SET(map, arp_sha); | |
1330 | FLOWMAP_SET(map, arp_tha); | |
0de8783a | 1331 | } |
0de8783a JR |
1332 | } |
1333 | ||
c11c6faa AZ |
1334 | /* Clear the metadata and register wildcard masks. They are not packet |
1335 | * header fields. */ | |
1336 | void | |
1337 | flow_wildcards_clear_non_packet_fields(struct flow_wildcards *wc) | |
1338 | { | |
0de8783a | 1339 | /* Update this function whenever struct flow changes. */ |
b666962b | 1340 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 33); |
0de8783a | 1341 | |
c11c6faa AZ |
1342 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
1343 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
c61f3870 | 1344 | wc->masks.actset_output = 0; |
18080541 | 1345 | wc->masks.conj_id = 0; |
c11c6faa AZ |
1346 | } |
1347 | ||
ecf1e7ac BP |
1348 | /* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or |
1349 | * fields. */ | |
1350 | bool | |
1351 | flow_wildcards_is_catchall(const struct flow_wildcards *wc) | |
1352 | { | |
d70e8c28 | 1353 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
659c2346 | 1354 | size_t i; |
ecf1e7ac | 1355 | |
d70e8c28 JR |
1356 | for (i = 0; i < FLOW_U64S; i++) { |
1357 | if (wc_u64[i]) { | |
ecf1e7ac BP |
1358 | return false; |
1359 | } | |
1360 | } | |
ecf1e7ac BP |
1361 | return true; |
1362 | } | |
1363 | ||
368eefac EJ |
1364 | /* Sets 'dst' as the bitwise AND of wildcards in 'src1' and 'src2'. |
1365 | * That is, a bit or a field is wildcarded in 'dst' if it is wildcarded | |
1366 | * in 'src1' or 'src2' or both. */ | |
b5d97350 | 1367 | void |
368eefac EJ |
1368 | flow_wildcards_and(struct flow_wildcards *dst, |
1369 | const struct flow_wildcards *src1, | |
1370 | const struct flow_wildcards *src2) | |
b5d97350 | 1371 | { |
d70e8c28 JR |
1372 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1373 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1374 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
659c2346 | 1375 | size_t i; |
a79c50f3 | 1376 | |
d70e8c28 JR |
1377 | for (i = 0; i < FLOW_U64S; i++) { |
1378 | dst_u64[i] = src1_u64[i] & src2_u64[i]; | |
26720e24 | 1379 | } |
b5d97350 BP |
1380 | } |
1381 | ||
368eefac EJ |
1382 | /* Sets 'dst' as the bitwise OR of wildcards in 'src1' and 'src2'. That |
1383 | * is, a bit or a field is wildcarded in 'dst' if it is neither | |
1384 | * wildcarded in 'src1' nor 'src2'. */ | |
1385 | void | |
1386 | flow_wildcards_or(struct flow_wildcards *dst, | |
1387 | const struct flow_wildcards *src1, | |
1388 | const struct flow_wildcards *src2) | |
1389 | { | |
d70e8c28 JR |
1390 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1391 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1392 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
368eefac EJ |
1393 | size_t i; |
1394 | ||
d70e8c28 JR |
1395 | for (i = 0; i < FLOW_U64S; i++) { |
1396 | dst_u64[i] = src1_u64[i] | src2_u64[i]; | |
368eefac EJ |
1397 | } |
1398 | } | |
1399 | ||
b5d97350 BP |
1400 | /* Returns a hash of the wildcards in 'wc'. */ |
1401 | uint32_t | |
1006cda6 | 1402 | flow_wildcards_hash(const struct flow_wildcards *wc, uint32_t basis) |
b5d97350 | 1403 | { |
ac31c5af | 1404 | return flow_hash(&wc->masks, basis); |
b5d97350 BP |
1405 | } |
1406 | ||
1407 | /* Returns true if 'a' and 'b' represent the same wildcards, false if they are | |
1408 | * different. */ | |
1409 | bool | |
1410 | flow_wildcards_equal(const struct flow_wildcards *a, | |
1411 | const struct flow_wildcards *b) | |
1412 | { | |
659c2346 | 1413 | return flow_equal(&a->masks, &b->masks); |
b5d97350 BP |
1414 | } |
1415 | ||
1416 | /* Returns true if at least one bit or field is wildcarded in 'a' but not in | |
1417 | * 'b', false otherwise. */ | |
1418 | bool | |
1419 | flow_wildcards_has_extra(const struct flow_wildcards *a, | |
1420 | const struct flow_wildcards *b) | |
1421 | { | |
d70e8c28 JR |
1422 | const uint64_t *a_u64 = (const uint64_t *) &a->masks; |
1423 | const uint64_t *b_u64 = (const uint64_t *) &b->masks; | |
659c2346 | 1424 | size_t i; |
a79c50f3 | 1425 | |
d70e8c28 JR |
1426 | for (i = 0; i < FLOW_U64S; i++) { |
1427 | if ((a_u64[i] & b_u64[i]) != b_u64[i]) { | |
b6c9e612 BP |
1428 | return true; |
1429 | } | |
1430 | } | |
659c2346 BP |
1431 | return false; |
1432 | } | |
b6c9e612 | 1433 | |
659c2346 BP |
1434 | /* Returns true if 'a' and 'b' are equal, except that 0-bits (wildcarded bits) |
1435 | * in 'wc' do not need to be equal in 'a' and 'b'. */ | |
1436 | bool | |
1437 | flow_equal_except(const struct flow *a, const struct flow *b, | |
1438 | const struct flow_wildcards *wc) | |
1439 | { | |
d70e8c28 JR |
1440 | const uint64_t *a_u64 = (const uint64_t *) a; |
1441 | const uint64_t *b_u64 = (const uint64_t *) b; | |
1442 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; | |
659c2346 | 1443 | size_t i; |
d31f1109 | 1444 | |
d70e8c28 JR |
1445 | for (i = 0; i < FLOW_U64S; i++) { |
1446 | if ((a_u64[i] ^ b_u64[i]) & wc_u64[i]) { | |
659c2346 BP |
1447 | return false; |
1448 | } | |
47284b1f | 1449 | } |
659c2346 | 1450 | return true; |
b5d97350 BP |
1451 | } |
1452 | ||
b6c9e612 BP |
1453 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1454 | * (A 0-bit indicates a wildcard bit.) */ | |
1455 | void | |
1456 | flow_wildcards_set_reg_mask(struct flow_wildcards *wc, int idx, uint32_t mask) | |
1457 | { | |
26720e24 | 1458 | wc->masks.regs[idx] = mask; |
b6c9e612 | 1459 | } |
ff55ea1f | 1460 | |
79fe0f46 BP |
1461 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1462 | * (A 0-bit indicates a wildcard bit.) */ | |
1463 | void | |
1464 | flow_wildcards_set_xreg_mask(struct flow_wildcards *wc, int idx, uint64_t mask) | |
1465 | { | |
1466 | flow_set_xreg(&wc->masks, idx, mask); | |
1467 | } | |
1468 | ||
28a560d9 JR |
1469 | /* Calculates the 5-tuple hash from the given miniflow. |
1470 | * This returns the same value as flow_hash_5tuple for the corresponding | |
1471 | * flow. */ | |
4f150744 JR |
1472 | uint32_t |
1473 | miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis) | |
1474 | { | |
28a560d9 | 1475 | uint32_t hash = basis; |
4f150744 | 1476 | |
28a560d9 JR |
1477 | if (flow) { |
1478 | ovs_be16 dl_type = MINIFLOW_GET_BE16(flow, dl_type); | |
1479 | ||
33c6a1b9 | 1480 | hash = hash_add(hash, MINIFLOW_GET_U8(flow, nw_proto)); |
28a560d9 JR |
1481 | |
1482 | /* Separate loops for better optimization. */ | |
1483 | if (dl_type == htons(ETH_TYPE_IPV6)) { | |
5fcff47b | 1484 | struct flowmap map = FLOWMAP_EMPTY_INITIALIZER; |
d70e8c28 | 1485 | uint64_t value; |
4f150744 | 1486 | |
5fcff47b JR |
1487 | FLOWMAP_SET(&map, ipv6_src); |
1488 | FLOWMAP_SET(&map, ipv6_dst); | |
1489 | ||
1490 | MINIFLOW_FOR_EACH_IN_FLOWMAP(value, flow, map) { | |
d70e8c28 | 1491 | hash = hash_add64(hash, value); |
28a560d9 JR |
1492 | } |
1493 | } else { | |
d70e8c28 JR |
1494 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_src)); |
1495 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_dst)); | |
28a560d9 | 1496 | } |
d70e8c28 JR |
1497 | /* Add both ports at once. */ |
1498 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, tp_src)); | |
33c6a1b9 | 1499 | hash = hash_finish(hash, 42); /* Arbitrary number. */ |
28a560d9 JR |
1500 | } |
1501 | return hash; | |
4f150744 JR |
1502 | } |
1503 | ||
268eca11 BP |
1504 | ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst); |
1505 | ASSERT_SEQUENTIAL(ipv6_src, ipv6_dst); | |
4f150744 | 1506 | |
63be20be AW |
1507 | /* Calculates the 5-tuple hash from the given flow. */ |
1508 | uint32_t | |
1509 | flow_hash_5tuple(const struct flow *flow, uint32_t basis) | |
1510 | { | |
28a560d9 | 1511 | uint32_t hash = basis; |
63be20be | 1512 | |
28a560d9 | 1513 | if (flow) { |
33c6a1b9 | 1514 | hash = hash_add(hash, flow->nw_proto); |
28a560d9 JR |
1515 | |
1516 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
d70e8c28 JR |
1517 | const uint64_t *flow_u64 = (const uint64_t *)flow; |
1518 | int ofs = offsetof(struct flow, ipv6_src) / 8; | |
1519 | int end = ofs + 2 * sizeof flow->ipv6_src / 8; | |
63be20be | 1520 | |
d70e8c28 JR |
1521 | for (;ofs < end; ofs++) { |
1522 | hash = hash_add64(hash, flow_u64[ofs]); | |
28a560d9 JR |
1523 | } |
1524 | } else { | |
33c6a1b9 JR |
1525 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_src); |
1526 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_dst); | |
28a560d9 | 1527 | } |
d70e8c28 JR |
1528 | /* Add both ports at once. */ |
1529 | hash = hash_add(hash, | |
1530 | ((const uint32_t *)flow)[offsetof(struct flow, tp_src) | |
1531 | / sizeof(uint32_t)]); | |
33c6a1b9 | 1532 | hash = hash_finish(hash, 42); /* Arbitrary number. */ |
28a560d9 JR |
1533 | } |
1534 | return hash; | |
63be20be AW |
1535 | } |
1536 | ||
ff55ea1f EJ |
1537 | /* Hashes 'flow' based on its L2 through L4 protocol information. */ |
1538 | uint32_t | |
1539 | flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis) | |
1540 | { | |
1541 | struct { | |
d31f1109 JP |
1542 | union { |
1543 | ovs_be32 ipv4_addr; | |
1544 | struct in6_addr ipv6_addr; | |
1545 | }; | |
ff55ea1f EJ |
1546 | ovs_be16 eth_type; |
1547 | ovs_be16 vlan_tci; | |
5b909cbb | 1548 | ovs_be16 tp_port; |
74ff3298 | 1549 | struct eth_addr eth_addr; |
ff55ea1f EJ |
1550 | uint8_t ip_proto; |
1551 | } fields; | |
1552 | ||
1553 | int i; | |
1554 | ||
1555 | memset(&fields, 0, sizeof fields); | |
74ff3298 JR |
1556 | for (i = 0; i < ARRAY_SIZE(fields.eth_addr.be16); i++) { |
1557 | fields.eth_addr.be16[i] = flow->dl_src.be16[i] ^ flow->dl_dst.be16[i]; | |
ff55ea1f EJ |
1558 | } |
1559 | fields.vlan_tci = flow->vlan_tci & htons(VLAN_VID_MASK); | |
1560 | fields.eth_type = flow->dl_type; | |
3e3eda95 EJ |
1561 | |
1562 | /* UDP source and destination port are not taken into account because they | |
1563 | * will not necessarily be symmetric in a bidirectional flow. */ | |
ff55ea1f | 1564 | if (fields.eth_type == htons(ETH_TYPE_IP)) { |
d31f1109 JP |
1565 | fields.ipv4_addr = flow->nw_src ^ flow->nw_dst; |
1566 | fields.ip_proto = flow->nw_proto; | |
c6bcb685 | 1567 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 1568 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
d31f1109 JP |
1569 | } |
1570 | } else if (fields.eth_type == htons(ETH_TYPE_IPV6)) { | |
1571 | const uint8_t *a = &flow->ipv6_src.s6_addr[0]; | |
1572 | const uint8_t *b = &flow->ipv6_dst.s6_addr[0]; | |
1573 | uint8_t *ipv6_addr = &fields.ipv6_addr.s6_addr[0]; | |
1574 | ||
1575 | for (i=0; i<16; i++) { | |
1576 | ipv6_addr[i] = a[i] ^ b[i]; | |
1577 | } | |
ff55ea1f | 1578 | fields.ip_proto = flow->nw_proto; |
c6bcb685 | 1579 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 1580 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
ff55ea1f | 1581 | } |
ff55ea1f | 1582 | } |
c49d1dd1 | 1583 | return jhash_bytes(&fields, sizeof fields, basis); |
ff55ea1f | 1584 | } |
520e9a2a | 1585 | |
4249b547 JB |
1586 | /* Hashes 'flow' based on its L3 through L4 protocol information */ |
1587 | uint32_t | |
1588 | flow_hash_symmetric_l3l4(const struct flow *flow, uint32_t basis, | |
1589 | bool inc_udp_ports) | |
1590 | { | |
1591 | uint32_t hash = basis; | |
1592 | ||
1593 | /* UDP source and destination port are also taken into account. */ | |
1594 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1595 | hash = hash_add(hash, | |
1596 | (OVS_FORCE uint32_t) (flow->nw_src ^ flow->nw_dst)); | |
1597 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1598 | /* IPv6 addresses are 64-bit aligned inside struct flow. */ | |
1599 | const uint64_t *a = ALIGNED_CAST(uint64_t *, flow->ipv6_src.s6_addr); | |
1600 | const uint64_t *b = ALIGNED_CAST(uint64_t *, flow->ipv6_dst.s6_addr); | |
1601 | ||
1602 | for (int i = 0; i < 4; i++) { | |
1603 | hash = hash_add64(hash, a[i] ^ b[i]); | |
1604 | } | |
1605 | } else { | |
1606 | /* Cannot hash non-IP flows */ | |
1607 | return 0; | |
1608 | } | |
1609 | ||
1610 | hash = hash_add(hash, flow->nw_proto); | |
1611 | if (flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP || | |
1612 | (inc_udp_ports && flow->nw_proto == IPPROTO_UDP)) { | |
1613 | hash = hash_add(hash, | |
1614 | (OVS_FORCE uint16_t) (flow->tp_src ^ flow->tp_dst)); | |
1615 | } | |
1616 | ||
1617 | return hash_finish(hash, basis); | |
1618 | } | |
1619 | ||
94639963 JR |
1620 | /* Initialize a flow with random fields that matter for nx_hash_fields. */ |
1621 | void | |
1622 | flow_random_hash_fields(struct flow *flow) | |
1623 | { | |
1624 | uint16_t rnd = random_uint16(); | |
1625 | ||
1626 | /* Initialize to all zeros. */ | |
1627 | memset(flow, 0, sizeof *flow); | |
1628 | ||
74ff3298 JR |
1629 | eth_addr_random(&flow->dl_src); |
1630 | eth_addr_random(&flow->dl_dst); | |
94639963 JR |
1631 | |
1632 | flow->vlan_tci = (OVS_FORCE ovs_be16) (random_uint16() & VLAN_VID_MASK); | |
1633 | ||
1634 | /* Make most of the random flows IPv4, some IPv6, and rest random. */ | |
1635 | flow->dl_type = rnd < 0x8000 ? htons(ETH_TYPE_IP) : | |
1636 | rnd < 0xc000 ? htons(ETH_TYPE_IPV6) : (OVS_FORCE ovs_be16)rnd; | |
1637 | ||
1638 | if (dl_type_is_ip_any(flow->dl_type)) { | |
1639 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1640 | flow->nw_src = (OVS_FORCE ovs_be32)random_uint32(); | |
1641 | flow->nw_dst = (OVS_FORCE ovs_be32)random_uint32(); | |
1642 | } else { | |
1643 | random_bytes(&flow->ipv6_src, sizeof flow->ipv6_src); | |
1644 | random_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst); | |
1645 | } | |
1646 | /* Make most of IP flows TCP, some UDP or SCTP, and rest random. */ | |
1647 | rnd = random_uint16(); | |
1648 | flow->nw_proto = rnd < 0x8000 ? IPPROTO_TCP : | |
1649 | rnd < 0xc000 ? IPPROTO_UDP : | |
1650 | rnd < 0xd000 ? IPPROTO_SCTP : (uint8_t)rnd; | |
1651 | if (flow->nw_proto == IPPROTO_TCP || | |
1652 | flow->nw_proto == IPPROTO_UDP || | |
1653 | flow->nw_proto == IPPROTO_SCTP) { | |
1654 | flow->tp_src = (OVS_FORCE ovs_be16)random_uint16(); | |
1655 | flow->tp_dst = (OVS_FORCE ovs_be16)random_uint16(); | |
1656 | } | |
1657 | } | |
1658 | } | |
1659 | ||
bcd2633a JP |
1660 | /* Masks the fields in 'wc' that are used by the flow hash 'fields'. */ |
1661 | void | |
6cdd5145 JP |
1662 | flow_mask_hash_fields(const struct flow *flow, struct flow_wildcards *wc, |
1663 | enum nx_hash_fields fields) | |
bcd2633a JP |
1664 | { |
1665 | switch (fields) { | |
1666 | case NX_HASH_FIELDS_ETH_SRC: | |
1667 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
1668 | break; | |
1669 | ||
1670 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
1671 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
1672 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
6cdd5145 JP |
1673 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
1674 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
1675 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
7f8a65ca | 1676 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
6cdd5145 JP |
1677 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); |
1678 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
1679 | } | |
1680 | if (is_ip_any(flow)) { | |
1681 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
d8d9c698 | 1682 | flow_unwildcard_tp_ports(flow, wc); |
6cdd5145 | 1683 | } |
1dd35f8a | 1684 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
bcd2633a JP |
1685 | break; |
1686 | ||
4249b547 JB |
1687 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: |
1688 | if (is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP) { | |
1689 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
1690 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
1691 | } | |
1692 | /* no break */ | |
1693 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: | |
1694 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1695 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
1696 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
1697 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1698 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); | |
1699 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
1700 | } else { | |
1701 | break; /* non-IP flow */ | |
1702 | } | |
1703 | ||
1704 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
1705 | if (flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP) { | |
1706 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
1707 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
1708 | } | |
1709 | break; | |
1710 | ||
bcd2633a | 1711 | default: |
428b2edd | 1712 | OVS_NOT_REACHED(); |
bcd2633a JP |
1713 | } |
1714 | } | |
1715 | ||
520e9a2a EJ |
1716 | /* Hashes the portions of 'flow' designated by 'fields'. */ |
1717 | uint32_t | |
1718 | flow_hash_fields(const struct flow *flow, enum nx_hash_fields fields, | |
1719 | uint16_t basis) | |
1720 | { | |
1721 | switch (fields) { | |
1722 | ||
1723 | case NX_HASH_FIELDS_ETH_SRC: | |
74ff3298 | 1724 | return jhash_bytes(&flow->dl_src, sizeof flow->dl_src, basis); |
520e9a2a EJ |
1725 | |
1726 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
1727 | return flow_hash_symmetric_l4(flow, basis); | |
4249b547 JB |
1728 | |
1729 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: | |
1730 | return flow_hash_symmetric_l3l4(flow, basis, false); | |
1731 | ||
1732 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: | |
1733 | return flow_hash_symmetric_l3l4(flow, basis, true); | |
1734 | ||
520e9a2a EJ |
1735 | } |
1736 | ||
428b2edd | 1737 | OVS_NOT_REACHED(); |
520e9a2a EJ |
1738 | } |
1739 | ||
1740 | /* Returns a string representation of 'fields'. */ | |
1741 | const char * | |
1742 | flow_hash_fields_to_str(enum nx_hash_fields fields) | |
1743 | { | |
1744 | switch (fields) { | |
1745 | case NX_HASH_FIELDS_ETH_SRC: return "eth_src"; | |
1746 | case NX_HASH_FIELDS_SYMMETRIC_L4: return "symmetric_l4"; | |
4249b547 JB |
1747 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: return "symmetric_l3l4"; |
1748 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: return "symmetric_l3l4+udp"; | |
520e9a2a EJ |
1749 | default: return "<unknown>"; |
1750 | } | |
1751 | } | |
1752 | ||
1753 | /* Returns true if the value of 'fields' is supported. Otherwise false. */ | |
1754 | bool | |
1755 | flow_hash_fields_valid(enum nx_hash_fields fields) | |
1756 | { | |
1757 | return fields == NX_HASH_FIELDS_ETH_SRC | |
4249b547 JB |
1758 | || fields == NX_HASH_FIELDS_SYMMETRIC_L4 |
1759 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4 | |
1760 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP; | |
520e9a2a | 1761 | } |
8b3b8dd1 | 1762 | |
368eefac EJ |
1763 | /* Returns a hash value for the bits of 'flow' that are active based on |
1764 | * 'wc', given 'basis'. */ | |
1765 | uint32_t | |
1766 | flow_hash_in_wildcards(const struct flow *flow, | |
1767 | const struct flow_wildcards *wc, uint32_t basis) | |
1768 | { | |
d70e8c28 JR |
1769 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
1770 | const uint64_t *flow_u64 = (const uint64_t *) flow; | |
368eefac EJ |
1771 | uint32_t hash; |
1772 | size_t i; | |
1773 | ||
1774 | hash = basis; | |
d70e8c28 JR |
1775 | for (i = 0; i < FLOW_U64S; i++) { |
1776 | hash = hash_add64(hash, flow_u64[i] & wc_u64[i]); | |
368eefac | 1777 | } |
d70e8c28 | 1778 | return hash_finish(hash, 8 * FLOW_U64S); |
368eefac EJ |
1779 | } |
1780 | ||
3719455c BP |
1781 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
1782 | * OpenFlow 1.0 "dl_vlan" value: | |
1783 | * | |
1784 | * - If it is in the range 0...4095, 'flow->vlan_tci' is set to match | |
1785 | * that VLAN. Any existing PCP match is unchanged (it becomes 0 if | |
1786 | * 'flow' previously matched packets without a VLAN header). | |
1787 | * | |
1788 | * - If it is OFP_VLAN_NONE, 'flow->vlan_tci' is set to match a packet | |
1789 | * without a VLAN tag. | |
1790 | * | |
1791 | * - Other values of 'vid' should not be used. */ | |
1792 | void | |
fb0451d9 | 1793 | flow_set_dl_vlan(struct flow *flow, ovs_be16 vid) |
3719455c | 1794 | { |
0c436519 | 1795 | if (vid == htons(OFP10_VLAN_NONE)) { |
3719455c BP |
1796 | flow->vlan_tci = htons(0); |
1797 | } else { | |
1798 | vid &= htons(VLAN_VID_MASK); | |
1799 | flow->vlan_tci &= ~htons(VLAN_VID_MASK); | |
1800 | flow->vlan_tci |= htons(VLAN_CFI) | vid; | |
1801 | } | |
1802 | } | |
1803 | ||
cc34bc8c BP |
1804 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
1805 | * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID | |
1806 | * plus CFI). */ | |
1807 | void | |
1808 | flow_set_vlan_vid(struct flow *flow, ovs_be16 vid) | |
1809 | { | |
1810 | ovs_be16 mask = htons(VLAN_VID_MASK | VLAN_CFI); | |
1811 | flow->vlan_tci &= ~mask; | |
1812 | flow->vlan_tci |= vid & mask; | |
1813 | } | |
1814 | ||
3719455c BP |
1815 | /* Sets the VLAN PCP that 'flow' matches to 'pcp', which should be in the |
1816 | * range 0...7. | |
1817 | * | |
1818 | * This function has no effect on the VLAN ID that 'flow' matches. | |
1819 | * | |
1820 | * After calling this function, 'flow' will not match packets without a VLAN | |
1821 | * header. */ | |
1822 | void | |
1823 | flow_set_vlan_pcp(struct flow *flow, uint8_t pcp) | |
1824 | { | |
1825 | pcp &= 0x07; | |
1826 | flow->vlan_tci &= ~htons(VLAN_PCP_MASK); | |
1827 | flow->vlan_tci |= htons((pcp << VLAN_PCP_SHIFT) | VLAN_CFI); | |
1828 | } | |
1829 | ||
8bfd0fda BP |
1830 | /* Returns the number of MPLS LSEs present in 'flow' |
1831 | * | |
1832 | * Returns 0 if the 'dl_type' of 'flow' is not an MPLS ethernet type. | |
1833 | * Otherwise traverses 'flow''s MPLS label stack stopping at the | |
1834 | * first entry that has the BoS bit set. If no such entry exists then | |
1835 | * the maximum number of LSEs that can be stored in 'flow' is returned. | |
1836 | */ | |
1837 | int | |
1838 | flow_count_mpls_labels(const struct flow *flow, struct flow_wildcards *wc) | |
1839 | { | |
22d38fca | 1840 | /* dl_type is always masked. */ |
8bfd0fda BP |
1841 | if (eth_type_mpls(flow->dl_type)) { |
1842 | int i; | |
5af43325 | 1843 | int cnt; |
8bfd0fda | 1844 | |
5af43325 PS |
1845 | cnt = 0; |
1846 | for (i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { | |
8bfd0fda BP |
1847 | if (wc) { |
1848 | wc->masks.mpls_lse[i] |= htonl(MPLS_BOS_MASK); | |
1849 | } | |
1850 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
1851 | return i + 1; | |
1852 | } | |
5af43325 PS |
1853 | if (flow->mpls_lse[i]) { |
1854 | cnt++; | |
1855 | } | |
8bfd0fda | 1856 | } |
5af43325 | 1857 | return cnt; |
8bfd0fda BP |
1858 | } else { |
1859 | return 0; | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | /* Returns the number consecutive of MPLS LSEs, starting at the | |
1864 | * innermost LSE, that are common in 'a' and 'b'. | |
1865 | * | |
1866 | * 'an' must be flow_count_mpls_labels(a). | |
1867 | * 'bn' must be flow_count_mpls_labels(b). | |
1868 | */ | |
1869 | int | |
1870 | flow_count_common_mpls_labels(const struct flow *a, int an, | |
1871 | const struct flow *b, int bn, | |
1872 | struct flow_wildcards *wc) | |
1873 | { | |
1874 | int min_n = MIN(an, bn); | |
1875 | if (min_n == 0) { | |
1876 | return 0; | |
1877 | } else { | |
1878 | int common_n = 0; | |
1879 | int a_last = an - 1; | |
1880 | int b_last = bn - 1; | |
1881 | int i; | |
1882 | ||
1883 | for (i = 0; i < min_n; i++) { | |
1884 | if (wc) { | |
1885 | wc->masks.mpls_lse[a_last - i] = OVS_BE32_MAX; | |
1886 | wc->masks.mpls_lse[b_last - i] = OVS_BE32_MAX; | |
1887 | } | |
1888 | if (a->mpls_lse[a_last - i] != b->mpls_lse[b_last - i]) { | |
1889 | break; | |
1890 | } else { | |
1891 | common_n++; | |
1892 | } | |
1893 | } | |
1894 | ||
1895 | return common_n; | |
1896 | } | |
1897 | } | |
1898 | ||
1899 | /* Adds a new outermost MPLS label to 'flow' and changes 'flow''s Ethernet type | |
1900 | * to 'mpls_eth_type', which must be an MPLS Ethertype. | |
1901 | * | |
1902 | * If the new label is the first MPLS label in 'flow', it is generated as; | |
1903 | * | |
1904 | * - label: 2, if 'flow' is IPv6, otherwise 0. | |
1905 | * | |
1906 | * - TTL: IPv4 or IPv6 TTL, if present and nonzero, otherwise 64. | |
1907 | * | |
1908 | * - TC: IPv4 or IPv6 TOS, if present, otherwise 0. | |
1909 | * | |
1910 | * - BoS: 1. | |
1911 | * | |
22d38fca | 1912 | * If the new label is the second or later label MPLS label in 'flow', it is |
8bfd0fda BP |
1913 | * generated as; |
1914 | * | |
368fb7e6 | 1915 | * - label: Copied from outer label. |
8bfd0fda BP |
1916 | * |
1917 | * - TTL: Copied from outer label. | |
1918 | * | |
1919 | * - TC: Copied from outer label. | |
1920 | * | |
1921 | * - BoS: 0. | |
1922 | * | |
1923 | * 'n' must be flow_count_mpls_labels(flow). 'n' must be less than | |
1924 | * FLOW_MAX_MPLS_LABELS (because otherwise flow->mpls_lse[] would overflow). | |
1925 | */ | |
1926 | void | |
1927 | flow_push_mpls(struct flow *flow, int n, ovs_be16 mpls_eth_type, | |
1928 | struct flow_wildcards *wc) | |
1929 | { | |
1930 | ovs_assert(eth_type_mpls(mpls_eth_type)); | |
1931 | ovs_assert(n < FLOW_MAX_MPLS_LABELS); | |
1932 | ||
8bfd0fda BP |
1933 | if (n) { |
1934 | int i; | |
1935 | ||
22d38fca JR |
1936 | if (wc) { |
1937 | memset(&wc->masks.mpls_lse, 0xff, sizeof *wc->masks.mpls_lse * n); | |
1938 | } | |
8bfd0fda BP |
1939 | for (i = n; i >= 1; i--) { |
1940 | flow->mpls_lse[i] = flow->mpls_lse[i - 1]; | |
1941 | } | |
22d38fca | 1942 | flow->mpls_lse[0] = (flow->mpls_lse[1] & htonl(~MPLS_BOS_MASK)); |
8bfd0fda BP |
1943 | } else { |
1944 | int label = 0; /* IPv4 Explicit Null. */ | |
1945 | int tc = 0; | |
1946 | int ttl = 64; | |
1947 | ||
1948 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1949 | label = 2; | |
1950 | } | |
1951 | ||
1952 | if (is_ip_any(flow)) { | |
1953 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; | |
22d38fca JR |
1954 | if (wc) { |
1955 | wc->masks.nw_tos |= IP_DSCP_MASK; | |
1956 | wc->masks.nw_ttl = 0xff; | |
1957 | } | |
8bfd0fda BP |
1958 | |
1959 | if (flow->nw_ttl) { | |
1960 | ttl = flow->nw_ttl; | |
1961 | } | |
8bfd0fda BP |
1962 | } |
1963 | ||
1964 | flow->mpls_lse[0] = set_mpls_lse_values(ttl, tc, 1, htonl(label)); | |
1965 | ||
d70e8c28 | 1966 | /* Clear all L3 and L4 fields and dp_hash. */ |
b666962b | 1967 | BUILD_ASSERT(FLOW_WC_SEQ == 33); |
8bfd0fda BP |
1968 | memset((char *) flow + FLOW_SEGMENT_2_ENDS_AT, 0, |
1969 | sizeof(struct flow) - FLOW_SEGMENT_2_ENDS_AT); | |
d70e8c28 | 1970 | flow->dp_hash = 0; |
8bfd0fda BP |
1971 | } |
1972 | flow->dl_type = mpls_eth_type; | |
1973 | } | |
1974 | ||
1975 | /* Tries to remove the outermost MPLS label from 'flow'. Returns true if | |
1976 | * successful, false otherwise. On success, sets 'flow''s Ethernet type to | |
1977 | * 'eth_type'. | |
1978 | * | |
1979 | * 'n' must be flow_count_mpls_labels(flow). */ | |
1980 | bool | |
1981 | flow_pop_mpls(struct flow *flow, int n, ovs_be16 eth_type, | |
1982 | struct flow_wildcards *wc) | |
1983 | { | |
1984 | int i; | |
1985 | ||
1986 | if (n == 0) { | |
1987 | /* Nothing to pop. */ | |
1988 | return false; | |
22d38fca JR |
1989 | } else if (n == FLOW_MAX_MPLS_LABELS) { |
1990 | if (wc) { | |
1991 | wc->masks.mpls_lse[n - 1] |= htonl(MPLS_BOS_MASK); | |
1992 | } | |
1993 | if (!(flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK))) { | |
1994 | /* Can't pop because don't know what to fill in mpls_lse[n - 1]. */ | |
1995 | return false; | |
1996 | } | |
8bfd0fda BP |
1997 | } |
1998 | ||
22d38fca JR |
1999 | if (wc) { |
2000 | memset(&wc->masks.mpls_lse[1], 0xff, | |
2001 | sizeof *wc->masks.mpls_lse * (n - 1)); | |
2002 | } | |
8bfd0fda BP |
2003 | for (i = 1; i < n; i++) { |
2004 | flow->mpls_lse[i - 1] = flow->mpls_lse[i]; | |
2005 | } | |
2006 | flow->mpls_lse[n - 1] = 0; | |
2007 | flow->dl_type = eth_type; | |
2008 | return true; | |
2009 | } | |
2010 | ||
b02475c5 SH |
2011 | /* Sets the MPLS Label that 'flow' matches to 'label', which is interpreted |
2012 | * as an OpenFlow 1.1 "mpls_label" value. */ | |
2013 | void | |
8bfd0fda | 2014 | flow_set_mpls_label(struct flow *flow, int idx, ovs_be32 label) |
b02475c5 | 2015 | { |
8bfd0fda | 2016 | set_mpls_lse_label(&flow->mpls_lse[idx], label); |
b02475c5 SH |
2017 | } |
2018 | ||
b676167a SH |
2019 | /* Sets the MPLS TTL that 'flow' matches to 'ttl', which should be in the |
2020 | * range 0...255. */ | |
2021 | void | |
8bfd0fda | 2022 | flow_set_mpls_ttl(struct flow *flow, int idx, uint8_t ttl) |
b676167a | 2023 | { |
8bfd0fda | 2024 | set_mpls_lse_ttl(&flow->mpls_lse[idx], ttl); |
b676167a SH |
2025 | } |
2026 | ||
b02475c5 SH |
2027 | /* Sets the MPLS TC that 'flow' matches to 'tc', which should be in the |
2028 | * range 0...7. */ | |
2029 | void | |
8bfd0fda | 2030 | flow_set_mpls_tc(struct flow *flow, int idx, uint8_t tc) |
b02475c5 | 2031 | { |
8bfd0fda | 2032 | set_mpls_lse_tc(&flow->mpls_lse[idx], tc); |
b02475c5 SH |
2033 | } |
2034 | ||
2035 | /* Sets the MPLS BOS bit that 'flow' matches to which should be 0 or 1. */ | |
2036 | void | |
8bfd0fda | 2037 | flow_set_mpls_bos(struct flow *flow, int idx, uint8_t bos) |
b02475c5 | 2038 | { |
8bfd0fda | 2039 | set_mpls_lse_bos(&flow->mpls_lse[idx], bos); |
b02475c5 SH |
2040 | } |
2041 | ||
8bfd0fda BP |
2042 | /* Sets the entire MPLS LSE. */ |
2043 | void | |
2044 | flow_set_mpls_lse(struct flow *flow, int idx, ovs_be32 lse) | |
2045 | { | |
2046 | flow->mpls_lse[idx] = lse; | |
2047 | } | |
52105b67 | 2048 | |
437d0d22 | 2049 | static size_t |
cf62fa4c | 2050 | flow_compose_l4(struct dp_packet *p, const struct flow *flow) |
52105b67 | 2051 | { |
437d0d22 JR |
2052 | size_t l4_len = 0; |
2053 | ||
52105b67 JR |
2054 | if (!(flow->nw_frag & FLOW_NW_FRAG_ANY) |
2055 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) { | |
2056 | if (flow->nw_proto == IPPROTO_TCP) { | |
2057 | struct tcp_header *tcp; | |
2058 | ||
437d0d22 | 2059 | l4_len = sizeof *tcp; |
cf62fa4c | 2060 | tcp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2061 | tcp->tcp_src = flow->tp_src; |
2062 | tcp->tcp_dst = flow->tp_dst; | |
2063 | tcp->tcp_ctl = TCP_CTL(ntohs(flow->tcp_flags), 5); | |
52105b67 JR |
2064 | } else if (flow->nw_proto == IPPROTO_UDP) { |
2065 | struct udp_header *udp; | |
2066 | ||
437d0d22 | 2067 | l4_len = sizeof *udp; |
cf62fa4c | 2068 | udp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2069 | udp->udp_src = flow->tp_src; |
2070 | udp->udp_dst = flow->tp_dst; | |
52105b67 JR |
2071 | } else if (flow->nw_proto == IPPROTO_SCTP) { |
2072 | struct sctp_header *sctp; | |
2073 | ||
437d0d22 | 2074 | l4_len = sizeof *sctp; |
cf62fa4c | 2075 | sctp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2076 | sctp->sctp_src = flow->tp_src; |
2077 | sctp->sctp_dst = flow->tp_dst; | |
52105b67 JR |
2078 | } else if (flow->nw_proto == IPPROTO_ICMP) { |
2079 | struct icmp_header *icmp; | |
2080 | ||
437d0d22 | 2081 | l4_len = sizeof *icmp; |
cf62fa4c | 2082 | icmp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2083 | icmp->icmp_type = ntohs(flow->tp_src); |
2084 | icmp->icmp_code = ntohs(flow->tp_dst); | |
2085 | icmp->icmp_csum = csum(icmp, ICMP_HEADER_LEN); | |
0e612675 FL |
2086 | } else if (flow->nw_proto == IPPROTO_IGMP) { |
2087 | struct igmp_header *igmp; | |
2088 | ||
2089 | l4_len = sizeof *igmp; | |
cf62fa4c | 2090 | igmp = dp_packet_put_zeros(p, l4_len); |
0e612675 FL |
2091 | igmp->igmp_type = ntohs(flow->tp_src); |
2092 | igmp->igmp_code = ntohs(flow->tp_dst); | |
2093 | put_16aligned_be32(&igmp->group, flow->igmp_group_ip4); | |
2094 | igmp->igmp_csum = csum(igmp, IGMP_HEADER_LEN); | |
52105b67 JR |
2095 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { |
2096 | struct icmp6_hdr *icmp; | |
2097 | ||
437d0d22 | 2098 | l4_len = sizeof *icmp; |
cf62fa4c | 2099 | icmp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2100 | icmp->icmp6_type = ntohs(flow->tp_src); |
2101 | icmp->icmp6_code = ntohs(flow->tp_dst); | |
2102 | ||
2103 | if (icmp->icmp6_code == 0 && | |
2104 | (icmp->icmp6_type == ND_NEIGHBOR_SOLICIT || | |
2105 | icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) { | |
2106 | struct in6_addr *nd_target; | |
74ff3298 | 2107 | struct ovs_nd_opt *nd_opt; |
52105b67 | 2108 | |
437d0d22 | 2109 | l4_len += sizeof *nd_target; |
cf62fa4c | 2110 | nd_target = dp_packet_put_zeros(p, sizeof *nd_target); |
52105b67 JR |
2111 | *nd_target = flow->nd_target; |
2112 | ||
2113 | if (!eth_addr_is_zero(flow->arp_sha)) { | |
437d0d22 | 2114 | l4_len += 8; |
cf62fa4c | 2115 | nd_opt = dp_packet_put_zeros(p, 8); |
52105b67 JR |
2116 | nd_opt->nd_opt_len = 1; |
2117 | nd_opt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; | |
74ff3298 | 2118 | nd_opt->nd_opt_mac = flow->arp_sha; |
52105b67 JR |
2119 | } |
2120 | if (!eth_addr_is_zero(flow->arp_tha)) { | |
437d0d22 | 2121 | l4_len += 8; |
cf62fa4c | 2122 | nd_opt = dp_packet_put_zeros(p, 8); |
52105b67 JR |
2123 | nd_opt->nd_opt_len = 1; |
2124 | nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR; | |
74ff3298 | 2125 | nd_opt->nd_opt_mac = flow->arp_tha; |
52105b67 JR |
2126 | } |
2127 | } | |
2128 | icmp->icmp6_cksum = (OVS_FORCE uint16_t) | |
cf62fa4c | 2129 | csum(icmp, (char *)dp_packet_tail(p) - (char *)icmp); |
52105b67 JR |
2130 | } |
2131 | } | |
437d0d22 | 2132 | return l4_len; |
52105b67 JR |
2133 | } |
2134 | ||
8b3b8dd1 BP |
2135 | /* Puts into 'b' a packet that flow_extract() would parse as having the given |
2136 | * 'flow'. | |
2137 | * | |
2138 | * (This is useful only for testing, obviously, and the packet isn't really | |
dc5a7ce7 | 2139 | * valid. It hasn't got some checksums filled in, for one, and lots of fields |
8b3b8dd1 BP |
2140 | * are just zeroed.) */ |
2141 | void | |
cf62fa4c | 2142 | flow_compose(struct dp_packet *p, const struct flow *flow) |
8b3b8dd1 | 2143 | { |
437d0d22 JR |
2144 | size_t l4_len; |
2145 | ||
52105b67 | 2146 | /* eth_compose() sets l3 pointer and makes sure it is 32-bit aligned. */ |
cf62fa4c | 2147 | eth_compose(p, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0); |
8b3b8dd1 | 2148 | if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) { |
cf62fa4c PS |
2149 | struct eth_header *eth = dp_packet_l2(p); |
2150 | eth->eth_type = htons(dp_packet_size(p)); | |
8b3b8dd1 BP |
2151 | return; |
2152 | } | |
2153 | ||
2154 | if (flow->vlan_tci & htons(VLAN_CFI)) { | |
cf62fa4c | 2155 | eth_push_vlan(p, htons(ETH_TYPE_VLAN), flow->vlan_tci); |
8b3b8dd1 BP |
2156 | } |
2157 | ||
cff78c88 | 2158 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
8b3b8dd1 BP |
2159 | struct ip_header *ip; |
2160 | ||
cf62fa4c | 2161 | ip = dp_packet_put_zeros(p, sizeof *ip); |
8b3b8dd1 | 2162 | ip->ip_ihl_ver = IP_IHL_VER(5, 4); |
eadef313 | 2163 | ip->ip_tos = flow->nw_tos; |
aabf5352 | 2164 | ip->ip_ttl = flow->nw_ttl; |
8b3b8dd1 | 2165 | ip->ip_proto = flow->nw_proto; |
7c457c33 BP |
2166 | put_16aligned_be32(&ip->ip_src, flow->nw_src); |
2167 | put_16aligned_be32(&ip->ip_dst, flow->nw_dst); | |
8b3b8dd1 | 2168 | |
eadef313 | 2169 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
7257b535 | 2170 | ip->ip_frag_off |= htons(IP_MORE_FRAGMENTS); |
eadef313 | 2171 | if (flow->nw_frag & FLOW_NW_FRAG_LATER) { |
7257b535 BP |
2172 | ip->ip_frag_off |= htons(100); |
2173 | } | |
2174 | } | |
df9b6612 | 2175 | |
cf62fa4c | 2176 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 2177 | |
cf62fa4c | 2178 | l4_len = flow_compose_l4(p, flow); |
52105b67 | 2179 | |
cf62fa4c PS |
2180 | ip = dp_packet_l3(p); |
2181 | ip->ip_tot_len = htons(p->l4_ofs - p->l3_ofs + l4_len); | |
dc5a7ce7 | 2182 | ip->ip_csum = csum(ip, sizeof *ip); |
cff78c88 | 2183 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
52105b67 JR |
2184 | struct ovs_16aligned_ip6_hdr *nh; |
2185 | ||
cf62fa4c | 2186 | nh = dp_packet_put_zeros(p, sizeof *nh); |
52105b67 JR |
2187 | put_16aligned_be32(&nh->ip6_flow, htonl(6 << 28) | |
2188 | htonl(flow->nw_tos << 20) | flow->ipv6_label); | |
2189 | nh->ip6_hlim = flow->nw_ttl; | |
2190 | nh->ip6_nxt = flow->nw_proto; | |
2191 | ||
2192 | memcpy(&nh->ip6_src, &flow->ipv6_src, sizeof(nh->ip6_src)); | |
2193 | memcpy(&nh->ip6_dst, &flow->ipv6_dst, sizeof(nh->ip6_dst)); | |
2194 | ||
cf62fa4c | 2195 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 2196 | |
cf62fa4c | 2197 | l4_len = flow_compose_l4(p, flow); |
52105b67 | 2198 | |
cf62fa4c | 2199 | nh = dp_packet_l3(p); |
437d0d22 | 2200 | nh->ip6_plen = htons(l4_len); |
cff78c88 SH |
2201 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
2202 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
8b3b8dd1 BP |
2203 | struct arp_eth_header *arp; |
2204 | ||
cf62fa4c PS |
2205 | arp = dp_packet_put_zeros(p, sizeof *arp); |
2206 | dp_packet_set_l3(p, arp); | |
8b3b8dd1 BP |
2207 | arp->ar_hrd = htons(1); |
2208 | arp->ar_pro = htons(ETH_TYPE_IP); | |
2209 | arp->ar_hln = ETH_ADDR_LEN; | |
2210 | arp->ar_pln = 4; | |
2211 | arp->ar_op = htons(flow->nw_proto); | |
2212 | ||
2213 | if (flow->nw_proto == ARP_OP_REQUEST || | |
2214 | flow->nw_proto == ARP_OP_REPLY) { | |
7c457c33 BP |
2215 | put_16aligned_be32(&arp->ar_spa, flow->nw_src); |
2216 | put_16aligned_be32(&arp->ar_tpa, flow->nw_dst); | |
74ff3298 JR |
2217 | arp->ar_sha = flow->arp_sha; |
2218 | arp->ar_tha = flow->arp_tha; | |
8b3b8dd1 BP |
2219 | } |
2220 | } | |
b02475c5 SH |
2221 | |
2222 | if (eth_type_mpls(flow->dl_type)) { | |
8bfd0fda BP |
2223 | int n; |
2224 | ||
cf62fa4c | 2225 | p->l2_5_ofs = p->l3_ofs; |
8bfd0fda BP |
2226 | for (n = 1; n < FLOW_MAX_MPLS_LABELS; n++) { |
2227 | if (flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK)) { | |
2228 | break; | |
2229 | } | |
2230 | } | |
2231 | while (n > 0) { | |
cf62fa4c | 2232 | push_mpls(p, flow->dl_type, flow->mpls_lse[--n]); |
8bfd0fda | 2233 | } |
b02475c5 | 2234 | } |
8b3b8dd1 | 2235 | } |
5cb7a798 BP |
2236 | \f |
2237 | /* Compressed flow. */ | |
2238 | ||
df40c152 | 2239 | /* Completes an initialization of 'dst' as a miniflow copy of 'src' begun by |
5fcff47b JR |
2240 | * the caller. The caller must have already computed 'dst->map' properly to |
2241 | * indicate the significant uint64_t elements of 'src'. | |
13751fd8 JR |
2242 | * |
2243 | * Normally the significant elements are the ones that are non-zero. However, | |
2244 | * when a miniflow is initialized from a (mini)mask, the values can be zeroes, | |
ceb3bd67 JR |
2245 | * so that the flow and mask always have the same maps. */ |
2246 | void | |
2247 | miniflow_init(struct miniflow *dst, const struct flow *src) | |
df40c152 | 2248 | { |
09b0fa9c | 2249 | uint64_t *dst_u64 = miniflow_values(dst); |
361d808d | 2250 | size_t idx; |
df40c152 | 2251 | |
5fcff47b JR |
2252 | FLOWMAP_FOR_EACH_INDEX(idx, dst->map) { |
2253 | *dst_u64++ = flow_u64_value(src, idx); | |
df40c152 BP |
2254 | } |
2255 | } | |
2256 | ||
361d808d | 2257 | /* Initialize the maps of 'flow' from 'src'. */ |
ceb3bd67 JR |
2258 | void |
2259 | miniflow_map_init(struct miniflow *flow, const struct flow *src) | |
5cb7a798 | 2260 | { |
ceb3bd67 | 2261 | /* Initialize map, counting the number of nonzero elements. */ |
5fcff47b JR |
2262 | flowmap_init(&flow->map); |
2263 | for (size_t i = 0; i < FLOW_U64S; i++) { | |
2264 | if (flow_u64_value(src, i)) { | |
2265 | flowmap_set(&flow->map, i, 1); | |
5cb7a798 BP |
2266 | } |
2267 | } | |
ceb3bd67 | 2268 | } |
5cb7a798 | 2269 | |
ceb3bd67 JR |
2270 | /* Allocates 'n' count of miniflows, consecutive in memory, initializing the |
2271 | * map of each from 'src'. | |
2272 | * Returns the size of the miniflow data. */ | |
2273 | size_t | |
2274 | miniflow_alloc(struct miniflow *dsts[], size_t n, const struct miniflow *src) | |
2275 | { | |
361d808d JR |
2276 | size_t n_values = miniflow_n_values(src); |
2277 | size_t data_size = MINIFLOW_VALUES_SIZE(n_values); | |
2278 | struct miniflow *dst = xmalloc(n * (sizeof *src + data_size)); | |
5fcff47b | 2279 | size_t i; |
ceb3bd67 JR |
2280 | |
2281 | COVERAGE_INC(miniflow_malloc); | |
2282 | ||
2283 | for (i = 0; i < n; i++) { | |
361d808d | 2284 | *dst = *src; /* Copy maps. */ |
ceb3bd67 | 2285 | dsts[i] = dst; |
361d808d JR |
2286 | dst += 1; /* Just past the maps. */ |
2287 | dst = (struct miniflow *)((uint64_t *)dst + n_values); /* Skip data. */ | |
ceb3bd67 JR |
2288 | } |
2289 | return data_size; | |
df40c152 | 2290 | } |
5cb7a798 | 2291 | |
ceb3bd67 JR |
2292 | /* Returns a miniflow copy of 'src'. The caller must eventually free() the |
2293 | * returned miniflow. */ | |
8fd47924 | 2294 | struct miniflow * |
ceb3bd67 | 2295 | miniflow_create(const struct flow *src) |
df40c152 | 2296 | { |
ceb3bd67 JR |
2297 | struct miniflow tmp; |
2298 | struct miniflow *dst; | |
2299 | ||
2300 | miniflow_map_init(&tmp, src); | |
2301 | ||
2302 | miniflow_alloc(&dst, 1, &tmp); | |
2303 | miniflow_init(dst, src); | |
2304 | return dst; | |
5cb7a798 BP |
2305 | } |
2306 | ||
3016f3e4 | 2307 | /* Initializes 'dst' as a copy of 'src'. The caller must have allocated |
8fd47924 | 2308 | * 'dst' to have inline space for 'n_values' data in 'src'. */ |
3016f3e4 | 2309 | void |
a851eb94 JR |
2310 | miniflow_clone(struct miniflow *dst, const struct miniflow *src, |
2311 | size_t n_values) | |
3016f3e4 | 2312 | { |
361d808d | 2313 | *dst = *src; /* Copy maps. */ |
09b0fa9c JR |
2314 | memcpy(miniflow_values(dst), miniflow_get_values(src), |
2315 | MINIFLOW_VALUES_SIZE(n_values)); | |
5cb7a798 BP |
2316 | } |
2317 | ||
2318 | /* Initializes 'dst' as a copy of 'src'. */ | |
2319 | void | |
2320 | miniflow_expand(const struct miniflow *src, struct flow *dst) | |
2321 | { | |
ad77e3c5 EJ |
2322 | memset(dst, 0, sizeof *dst); |
2323 | flow_union_with_miniflow(dst, src); | |
5cb7a798 BP |
2324 | } |
2325 | ||
8fd47924 | 2326 | /* Returns true if 'a' and 'b' are equal miniflows, false otherwise. */ |
5cb7a798 BP |
2327 | bool |
2328 | miniflow_equal(const struct miniflow *a, const struct miniflow *b) | |
2329 | { | |
09b0fa9c JR |
2330 | const uint64_t *ap = miniflow_get_values(a); |
2331 | const uint64_t *bp = miniflow_get_values(b); | |
5cb7a798 | 2332 | |
5fcff47b JR |
2333 | /* This is mostly called after a matching hash, so it is highly likely that |
2334 | * the maps are equal as well. */ | |
2335 | if (OVS_LIKELY(flowmap_equal(a->map, b->map))) { | |
361d808d | 2336 | return !memcmp(ap, bp, miniflow_n_values(a) * sizeof *ap); |
080e28d0 | 2337 | } else { |
5fcff47b | 2338 | size_t idx; |
df40c152 | 2339 | |
5fcff47b JR |
2340 | FLOWMAP_FOR_EACH_INDEX (idx, flowmap_or(a->map, b->map)) { |
2341 | if ((flowmap_is_set(&a->map, idx) ? *ap++ : 0) | |
2342 | != (flowmap_is_set(&b->map, idx) ? *bp++ : 0)) { | |
080e28d0 | 2343 | return false; |
df40c152 | 2344 | } |
5cb7a798 BP |
2345 | } |
2346 | } | |
2347 | ||
df40c152 | 2348 | return true; |
5cb7a798 BP |
2349 | } |
2350 | ||
de4ad4a2 JR |
2351 | /* Returns false if 'a' and 'b' differ at the places where there are 1-bits |
2352 | * in 'mask', true otherwise. */ | |
5cb7a798 BP |
2353 | bool |
2354 | miniflow_equal_in_minimask(const struct miniflow *a, const struct miniflow *b, | |
2355 | const struct minimask *mask) | |
2356 | { | |
09b0fa9c | 2357 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 2358 | size_t idx; |
5cb7a798 | 2359 | |
5fcff47b | 2360 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
1cea007c | 2361 | if ((miniflow_get(a, idx) ^ miniflow_get(b, idx)) & *p++) { |
080e28d0 | 2362 | return false; |
5cb7a798 BP |
2363 | } |
2364 | } | |
2365 | ||
2366 | return true; | |
2367 | } | |
2368 | ||
2369 | /* Returns true if 'a' and 'b' are equal at the places where there are 1-bits | |
2370 | * in 'mask', false if they differ. */ | |
2371 | bool | |
2372 | miniflow_equal_flow_in_minimask(const struct miniflow *a, const struct flow *b, | |
2373 | const struct minimask *mask) | |
2374 | { | |
09b0fa9c | 2375 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 2376 | size_t idx; |
5cb7a798 | 2377 | |
5fcff47b JR |
2378 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
2379 | if ((miniflow_get(a, idx) ^ flow_u64_value(b, idx)) & *p++) { | |
080e28d0 | 2380 | return false; |
5cb7a798 BP |
2381 | } |
2382 | } | |
2383 | ||
2384 | return true; | |
2385 | } | |
2386 | ||
5cb7a798 | 2387 | \f |
ceb3bd67 JR |
2388 | void |
2389 | minimask_init(struct minimask *mask, const struct flow_wildcards *wc) | |
2390 | { | |
2391 | miniflow_init(&mask->masks, &wc->masks); | |
2392 | } | |
2393 | ||
8fd47924 JR |
2394 | /* Returns a minimask copy of 'wc'. The caller must eventually free the |
2395 | * returned minimask with free(). */ | |
2396 | struct minimask * | |
2397 | minimask_create(const struct flow_wildcards *wc) | |
5cb7a798 | 2398 | { |
8fd47924 | 2399 | return (struct minimask *)miniflow_create(&wc->masks); |
5cb7a798 BP |
2400 | } |
2401 | ||
2402 | /* Initializes 'dst_' as the bit-wise "and" of 'a_' and 'b_'. | |
2403 | * | |
8fd47924 JR |
2404 | * The caller must provide room for FLOW_U64S "uint64_t"s in 'storage', which |
2405 | * must follow '*dst_' in memory, for use by 'dst_'. The caller must *not* | |
2406 | * free 'dst_' free(). */ | |
5cb7a798 BP |
2407 | void |
2408 | minimask_combine(struct minimask *dst_, | |
2409 | const struct minimask *a_, const struct minimask *b_, | |
d70e8c28 | 2410 | uint64_t storage[FLOW_U64S]) |
5cb7a798 BP |
2411 | { |
2412 | struct miniflow *dst = &dst_->masks; | |
d70e8c28 | 2413 | uint64_t *dst_values = storage; |
5cb7a798 BP |
2414 | const struct miniflow *a = &a_->masks; |
2415 | const struct miniflow *b = &b_->masks; | |
361d808d | 2416 | size_t idx; |
5cb7a798 | 2417 | |
5fcff47b | 2418 | flowmap_init(&dst->map); |
080e28d0 | 2419 | |
5fcff47b | 2420 | FLOWMAP_FOR_EACH_INDEX(idx, flowmap_and(a->map, b->map)) { |
361d808d | 2421 | /* Both 'a' and 'b' have non-zero data at 'idx'. */ |
5fcff47b | 2422 | uint64_t mask = *miniflow_get__(a, idx) & *miniflow_get__(b, idx); |
361d808d JR |
2423 | |
2424 | if (mask) { | |
5fcff47b | 2425 | flowmap_set(&dst->map, idx, 1); |
1cea007c | 2426 | *dst_values++ = mask; |
5cb7a798 BP |
2427 | } |
2428 | } | |
2429 | } | |
2430 | ||
8fd47924 | 2431 | /* Initializes 'wc' as a copy of 'mask'. */ |
5cb7a798 BP |
2432 | void |
2433 | minimask_expand(const struct minimask *mask, struct flow_wildcards *wc) | |
2434 | { | |
2435 | miniflow_expand(&mask->masks, &wc->masks); | |
2436 | } | |
2437 | ||
f4d335e9 JR |
2438 | /* Returns true if 'a' and 'b' are the same flow mask, false otherwise. |
2439 | * Minimasks may not have zero data values, so for the minimasks to be the | |
2440 | * same, they need to have the same map and the same data values. */ | |
5cb7a798 BP |
2441 | bool |
2442 | minimask_equal(const struct minimask *a, const struct minimask *b) | |
2443 | { | |
5fcff47b JR |
2444 | return !memcmp(a, b, sizeof *a |
2445 | + MINIFLOW_VALUES_SIZE(miniflow_n_values(&a->masks))); | |
5cb7a798 BP |
2446 | } |
2447 | ||
d4570fd8 | 2448 | /* Returns true if at least one bit matched by 'b' is wildcarded by 'a', |
5cb7a798 BP |
2449 | * false otherwise. */ |
2450 | bool | |
d4570fd8 | 2451 | minimask_has_extra(const struct minimask *a, const struct minimask *b) |
5cb7a798 | 2452 | { |
09b0fa9c | 2453 | const uint64_t *bp = miniflow_get_values(&b->masks); |
361d808d | 2454 | size_t idx; |
5cb7a798 | 2455 | |
5fcff47b | 2456 | FLOWMAP_FOR_EACH_INDEX(idx, b->masks.map) { |
d70e8c28 | 2457 | uint64_t b_u64 = *bp++; |
5cb7a798 | 2458 | |
d70e8c28 JR |
2459 | /* 'b_u64' is non-zero, check if the data in 'a' is either zero |
2460 | * or misses some of the bits in 'b_u64'. */ | |
5fcff47b JR |
2461 | if (!MINIFLOW_IN_MAP(&a->masks, idx) |
2462 | || ((*miniflow_get__(&a->masks, idx) & b_u64) != b_u64)) { | |
f4d335e9 | 2463 | return true; /* 'a' wildcards some bits 'b' doesn't. */ |
5cb7a798 BP |
2464 | } |
2465 | } | |
2466 | ||
2467 | return false; | |
2468 | } |