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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" |
064af421 BP |
35 | #include "ofpbuf.h" |
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 | ||
419681da JR |
53 | /* miniflow_extract() assumes the following to be true to optimize the |
54 | * extraction process. */ | |
55 | BUILD_ASSERT_DECL(offsetof(struct flow, dl_type) + 2 | |
56 | == offsetof(struct flow, vlan_tci) && | |
57 | offsetof(struct flow, dl_type) / 4 | |
58 | == offsetof(struct flow, vlan_tci) / 4 ); | |
59 | ||
60 | BUILD_ASSERT_DECL(offsetof(struct flow, nw_frag) + 3 | |
61 | == offsetof(struct flow, nw_proto) && | |
62 | offsetof(struct flow, nw_tos) + 2 | |
63 | == offsetof(struct flow, nw_proto) && | |
64 | offsetof(struct flow, nw_ttl) + 1 | |
65 | == offsetof(struct flow, nw_proto) && | |
66 | offsetof(struct flow, nw_frag) / 4 | |
67 | == offsetof(struct flow, nw_tos) / 4 && | |
68 | offsetof(struct flow, nw_ttl) / 4 | |
69 | == offsetof(struct flow, nw_tos) / 4 && | |
70 | offsetof(struct flow, nw_proto) / 4 | |
71 | == offsetof(struct flow, nw_tos) / 4); | |
72 | ||
d70e8c28 JR |
73 | /* TCP flags in the middle of a BE64, zeroes in the other half. */ |
74 | BUILD_ASSERT_DECL(offsetof(struct flow, tcp_flags) % 8 == 4); | |
75 | ||
419681da JR |
76 | #if WORDS_BIGENDIAN |
77 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl) \ | |
78 | << 16) | |
79 | #else | |
80 | #define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl)) | |
81 | #endif | |
82 | ||
83 | BUILD_ASSERT_DECL(offsetof(struct flow, tp_src) + 2 | |
84 | == offsetof(struct flow, tp_dst) && | |
85 | offsetof(struct flow, tp_src) / 4 | |
86 | == offsetof(struct flow, tp_dst) / 4); | |
87 | ||
88 | /* Removes 'size' bytes from the head end of '*datap', of size '*sizep', which | |
89 | * must contain at least 'size' bytes of data. Returns the first byte of data | |
90 | * removed. */ | |
91 | static inline const void * | |
92 | data_pull(void **datap, size_t *sizep, size_t size) | |
a26ef517 | 93 | { |
419681da JR |
94 | char *data = (char *)*datap; |
95 | *datap = data + size; | |
96 | *sizep -= size; | |
97 | return data; | |
a26ef517 JP |
98 | } |
99 | ||
419681da JR |
100 | /* If '*datap' has at least 'size' bytes of data, removes that many bytes from |
101 | * the head end of '*datap' and returns the first byte removed. Otherwise, | |
102 | * returns a null pointer without modifying '*datap'. */ | |
103 | static inline const void * | |
104 | data_try_pull(void **datap, size_t *sizep, size_t size) | |
064af421 | 105 | { |
419681da | 106 | return OVS_LIKELY(*sizep >= size) ? data_pull(datap, sizep, size) : NULL; |
064af421 BP |
107 | } |
108 | ||
419681da JR |
109 | /* Context for pushing data to a miniflow. */ |
110 | struct mf_ctx { | |
111 | uint64_t map; | |
d70e8c28 JR |
112 | uint64_t *data; |
113 | uint64_t * const end; | |
419681da | 114 | }; |
064af421 | 115 | |
419681da JR |
116 | /* miniflow_push_* macros allow filling in a miniflow data values in order. |
117 | * Assertions are needed only when the layout of the struct flow is modified. | |
118 | * 'ofs' is a compile-time constant, which allows most of the code be optimized | |
694ffecc | 119 | * away. Some GCC versions gave warnings on ALWAYS_INLINE, so these are |
419681da JR |
120 | * defined as macros. */ |
121 | ||
18080541 | 122 | #if (FLOW_WC_SEQ != 30) |
419681da | 123 | #define MINIFLOW_ASSERT(X) ovs_assert(X) |
dce96af8 DDP |
124 | BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime " |
125 | "assertions enabled. Consider updating FLOW_WC_SEQ after " | |
126 | "testing") | |
419681da JR |
127 | #else |
128 | #define MINIFLOW_ASSERT(X) | |
129 | #endif | |
130 | ||
d70e8c28 | 131 | #define miniflow_push_uint64_(MF, OFS, VALUE) \ |
419681da | 132 | { \ |
d70e8c28 JR |
133 | MINIFLOW_ASSERT(MF.data < MF.end && (OFS) % 8 == 0 \ |
134 | && !(MF.map & (UINT64_MAX << (OFS) / 8))); \ | |
419681da | 135 | *MF.data++ = VALUE; \ |
d70e8c28 | 136 | MF.map |= UINT64_C(1) << (OFS) / 8; \ |
d31f1109 JP |
137 | } |
138 | ||
d70e8c28 JR |
139 | #define miniflow_push_be64_(MF, OFS, VALUE) \ |
140 | miniflow_push_uint64_(MF, OFS, (OVS_FORCE uint64_t)(VALUE)) | |
419681da | 141 | |
d70e8c28 | 142 | #define miniflow_push_uint32_(MF, OFS, VALUE) \ |
419681da JR |
143 | { \ |
144 | MINIFLOW_ASSERT(MF.data < MF.end && \ | |
d70e8c28 JR |
145 | (((OFS) % 8 == 0 && !(MF.map & (UINT64_MAX << (OFS) / 8))) \ |
146 | || ((OFS) % 8 == 4 && MF.map & (UINT64_C(1) << (OFS) / 8) \ | |
147 | && !(MF.map & (UINT64_MAX << ((OFS) / 8 + 1)))))); \ | |
148 | \ | |
149 | if ((OFS) % 8 == 0) { \ | |
150 | *(uint32_t *)MF.data = VALUE; \ | |
151 | MF.map |= UINT64_C(1) << (OFS) / 8; \ | |
152 | } else if ((OFS) % 8 == 4) { \ | |
153 | *((uint32_t *)MF.data + 1) = VALUE; \ | |
154 | MF.data++; \ | |
155 | } \ | |
156 | } | |
157 | ||
158 | #define miniflow_push_be32_(MF, OFS, VALUE) \ | |
159 | miniflow_push_uint32_(MF, OFS, (OVS_FORCE uint32_t)(VALUE)) | |
160 | ||
161 | #define miniflow_push_uint16_(MF, OFS, VALUE) \ | |
162 | { \ | |
163 | MINIFLOW_ASSERT(MF.data < MF.end && \ | |
164 | (((OFS) % 8 == 0 && !(MF.map & (UINT64_MAX << (OFS) / 8))) \ | |
165 | || ((OFS) % 2 == 0 && MF.map & (UINT64_C(1) << (OFS) / 8) \ | |
166 | && !(MF.map & (UINT64_MAX << ((OFS) / 8 + 1)))))); \ | |
419681da | 167 | \ |
d70e8c28 | 168 | if ((OFS) % 8 == 0) { \ |
419681da | 169 | *(uint16_t *)MF.data = VALUE; \ |
d70e8c28 JR |
170 | MF.map |= UINT64_C(1) << (OFS) / 8; \ |
171 | } else if ((OFS) % 8 == 2) { \ | |
419681da | 172 | *((uint16_t *)MF.data + 1) = VALUE; \ |
d70e8c28 JR |
173 | } else if ((OFS) % 8 == 4) { \ |
174 | *((uint16_t *)MF.data + 2) = VALUE; \ | |
175 | } else if ((OFS) % 8 == 6) { \ | |
176 | *((uint16_t *)MF.data + 3) = VALUE; \ | |
419681da JR |
177 | MF.data++; \ |
178 | } \ | |
b02475c5 SH |
179 | } |
180 | ||
d70e8c28 JR |
181 | #define miniflow_pad_to_64_(MF, OFS) \ |
182 | { \ | |
183 | MINIFLOW_ASSERT((OFS) % 8 != 0); \ | |
184 | MINIFLOW_ASSERT(MF.map & (UINT64_C(1) << (OFS) / 8)); \ | |
185 | MINIFLOW_ASSERT(!(MF.map & (UINT64_MAX << ((OFS) / 8 + 1)))); \ | |
186 | \ | |
187 | memset((uint8_t *)MF.data + (OFS) % 8, 0, 8 - (OFS) % 8); \ | |
188 | MF.data++; \ | |
189 | } | |
190 | ||
191 | #define miniflow_push_be16_(MF, OFS, VALUE) \ | |
419681da JR |
192 | miniflow_push_uint16_(MF, OFS, (OVS_FORCE uint16_t)VALUE); |
193 | ||
194 | /* Data at 'valuep' may be unaligned. */ | |
195 | #define miniflow_push_words_(MF, OFS, VALUEP, N_WORDS) \ | |
196 | { \ | |
d70e8c28 | 197 | int ofs64 = (OFS) / 8; \ |
419681da | 198 | \ |
d70e8c28 JR |
199 | MINIFLOW_ASSERT(MF.data + (N_WORDS) <= MF.end && (OFS) % 8 == 0 \ |
200 | && !(MF.map & (UINT64_MAX << ofs64))); \ | |
419681da JR |
201 | \ |
202 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof *MF.data); \ | |
203 | MF.data += (N_WORDS); \ | |
d70e8c28 | 204 | MF.map |= ((UINT64_MAX >> (64 - (N_WORDS))) << ofs64); \ |
064af421 BP |
205 | } |
206 | ||
d70e8c28 JR |
207 | /* Push 32-bit words padded to 64-bits. */ |
208 | #define miniflow_push_words_32_(MF, OFS, VALUEP, N_WORDS) \ | |
209 | { \ | |
210 | int ofs64 = (OFS) / 8; \ | |
211 | \ | |
212 | MINIFLOW_ASSERT(MF.data + DIV_ROUND_UP(N_WORDS, 2) <= MF.end \ | |
213 | && (OFS) % 8 == 0 \ | |
214 | && !(MF.map & (UINT64_MAX << ofs64))); \ | |
215 | \ | |
216 | memcpy(MF.data, (VALUEP), (N_WORDS) * sizeof(uint32_t)); \ | |
217 | MF.data += DIV_ROUND_UP(N_WORDS, 2); \ | |
218 | MF.map |= ((UINT64_MAX >> (64 - DIV_ROUND_UP(N_WORDS, 2))) << ofs64); \ | |
219 | if ((N_WORDS) & 1) { \ | |
220 | *((uint32_t *)MF.data - 1) = 0; \ | |
221 | } \ | |
222 | } | |
50f06e16 | 223 | |
d70e8c28 JR |
224 | /* Data at 'valuep' may be unaligned. */ |
225 | /* MACs start 64-aligned, and must be followed by other data or padding. */ | |
226 | #define miniflow_push_macs_(MF, OFS, VALUEP) \ | |
227 | { \ | |
228 | int ofs64 = (OFS) / 8; \ | |
229 | \ | |
230 | MINIFLOW_ASSERT(MF.data + 2 <= MF.end && (OFS) % 8 == 0 \ | |
231 | && !(MF.map & (UINT64_MAX << ofs64))); \ | |
232 | \ | |
233 | memcpy(MF.data, (VALUEP), 2 * ETH_ADDR_LEN); \ | |
234 | MF.data += 1; /* First word only. */ \ | |
235 | MF.map |= UINT64_C(3) << ofs64; /* Both words. */ \ | |
236 | } | |
50f06e16 | 237 | |
d70e8c28 JR |
238 | #define miniflow_push_uint32(MF, FIELD, VALUE) \ |
239 | miniflow_push_uint32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 240 | |
d70e8c28 JR |
241 | #define miniflow_push_be32(MF, FIELD, VALUE) \ |
242 | miniflow_push_be32_(MF, offsetof(struct flow, FIELD), VALUE) | |
50f06e16 | 243 | |
d70e8c28 | 244 | #define miniflow_push_uint16(MF, FIELD, VALUE) \ |
419681da | 245 | miniflow_push_uint16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 246 | |
d70e8c28 | 247 | #define miniflow_push_be16(MF, FIELD, VALUE) \ |
419681da | 248 | miniflow_push_be16_(MF, offsetof(struct flow, FIELD), VALUE) |
9e69bc5f | 249 | |
d70e8c28 JR |
250 | #define miniflow_pad_to_64(MF, FIELD) \ |
251 | miniflow_pad_to_64_(MF, offsetof(struct flow, FIELD)) | |
252 | ||
419681da JR |
253 | #define miniflow_push_words(MF, FIELD, VALUEP, N_WORDS) \ |
254 | miniflow_push_words_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
064af421 | 255 | |
d70e8c28 JR |
256 | #define miniflow_push_words_32(MF, FIELD, VALUEP, N_WORDS) \ |
257 | miniflow_push_words_32_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS) | |
258 | ||
259 | #define miniflow_push_macs(MF, FIELD, VALUEP) \ | |
260 | miniflow_push_macs_(MF, offsetof(struct flow, FIELD), VALUEP) | |
261 | ||
419681da JR |
262 | /* Pulls the MPLS headers at '*datap' and returns the count of them. */ |
263 | static inline int | |
264 | parse_mpls(void **datap, size_t *sizep) | |
d31f1109 | 265 | { |
419681da JR |
266 | const struct mpls_hdr *mh; |
267 | int count = 0; | |
d31f1109 | 268 | |
419681da JR |
269 | while ((mh = data_try_pull(datap, sizep, sizeof *mh))) { |
270 | count++; | |
271 | if (mh->mpls_lse.lo & htons(1 << MPLS_BOS_SHIFT)) { | |
d31f1109 JP |
272 | break; |
273 | } | |
419681da | 274 | } |
ba8561c6 | 275 | return MIN(count, FLOW_MAX_MPLS_LABELS); |
419681da | 276 | } |
d31f1109 | 277 | |
419681da JR |
278 | static inline ovs_be16 |
279 | parse_vlan(void **datap, size_t *sizep) | |
280 | { | |
281 | const struct eth_header *eth = *datap; | |
d31f1109 | 282 | |
419681da JR |
283 | struct qtag_prefix { |
284 | ovs_be16 eth_type; /* ETH_TYPE_VLAN */ | |
285 | ovs_be16 tci; | |
286 | }; | |
d31f1109 | 287 | |
419681da | 288 | data_pull(datap, sizep, ETH_ADDR_LEN * 2); |
d31f1109 | 289 | |
419681da JR |
290 | if (eth->eth_type == htons(ETH_TYPE_VLAN)) { |
291 | if (OVS_LIKELY(*sizep | |
292 | >= sizeof(struct qtag_prefix) + sizeof(ovs_be16))) { | |
293 | const struct qtag_prefix *qp = data_pull(datap, sizep, sizeof *qp); | |
294 | return qp->tci | htons(VLAN_CFI); | |
d31f1109 JP |
295 | } |
296 | } | |
88366484 | 297 | return 0; |
d31f1109 JP |
298 | } |
299 | ||
419681da JR |
300 | static inline ovs_be16 |
301 | parse_ethertype(void **datap, size_t *sizep) | |
88366484 | 302 | { |
419681da JR |
303 | const struct llc_snap_header *llc; |
304 | ovs_be16 proto; | |
5a51b2cd | 305 | |
419681da JR |
306 | proto = *(ovs_be16 *) data_pull(datap, sizep, sizeof proto); |
307 | if (OVS_LIKELY(ntohs(proto) >= ETH_TYPE_MIN)) { | |
308 | return proto; | |
88366484 | 309 | } |
5a51b2cd | 310 | |
419681da JR |
311 | if (OVS_UNLIKELY(*sizep < sizeof *llc)) { |
312 | return htons(FLOW_DL_TYPE_NONE); | |
88366484 | 313 | } |
5a51b2cd | 314 | |
419681da JR |
315 | llc = *datap; |
316 | if (OVS_UNLIKELY(llc->llc.llc_dsap != LLC_DSAP_SNAP | |
317 | || llc->llc.llc_ssap != LLC_SSAP_SNAP | |
318 | || llc->llc.llc_cntl != LLC_CNTL_SNAP | |
319 | || memcmp(llc->snap.snap_org, SNAP_ORG_ETHERNET, | |
320 | sizeof llc->snap.snap_org))) { | |
321 | return htons(FLOW_DL_TYPE_NONE); | |
c6bcb685 | 322 | } |
c6bcb685 | 323 | |
419681da | 324 | data_pull(datap, sizep, sizeof *llc); |
685a51a5 | 325 | |
419681da JR |
326 | if (OVS_LIKELY(ntohs(llc->snap.snap_type) >= ETH_TYPE_MIN)) { |
327 | return llc->snap.snap_type; | |
685a51a5 JP |
328 | } |
329 | ||
419681da JR |
330 | return htons(FLOW_DL_TYPE_NONE); |
331 | } | |
685a51a5 | 332 | |
419681da JR |
333 | static inline bool |
334 | parse_icmpv6(void **datap, size_t *sizep, const struct icmp6_hdr *icmp, | |
335 | const struct in6_addr **nd_target, | |
336 | uint8_t arp_buf[2][ETH_ADDR_LEN]) | |
337 | { | |
88366484 JG |
338 | if (icmp->icmp6_code == 0 && |
339 | (icmp->icmp6_type == ND_NEIGHBOR_SOLICIT || | |
340 | icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) { | |
685a51a5 | 341 | |
b0e2ec32 | 342 | *nd_target = data_try_pull(datap, sizep, sizeof **nd_target); |
419681da JR |
343 | if (OVS_UNLIKELY(!*nd_target)) { |
344 | return false; | |
685a51a5 | 345 | } |
685a51a5 | 346 | |
419681da | 347 | while (*sizep >= 8) { |
685a51a5 JP |
348 | /* The minimum size of an option is 8 bytes, which also is |
349 | * the size of Ethernet link-layer options. */ | |
419681da | 350 | const struct nd_opt_hdr *nd_opt = *datap; |
88366484 JG |
351 | int opt_len = nd_opt->nd_opt_len * 8; |
352 | ||
419681da | 353 | if (!opt_len || opt_len > *sizep) { |
685a51a5 JP |
354 | goto invalid; |
355 | } | |
685a51a5 JP |
356 | |
357 | /* Store the link layer address if the appropriate option is | |
358 | * provided. It is considered an error if the same link | |
359 | * layer option is specified twice. */ | |
360 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LINKADDR | |
361 | && opt_len == 8) { | |
419681da JR |
362 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[0]))) { |
363 | memcpy(arp_buf[0], nd_opt + 1, ETH_ADDR_LEN); | |
685a51a5 JP |
364 | } else { |
365 | goto invalid; | |
366 | } | |
367 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LINKADDR | |
368 | && opt_len == 8) { | |
419681da JR |
369 | if (OVS_LIKELY(eth_addr_is_zero(arp_buf[1]))) { |
370 | memcpy(arp_buf[1], nd_opt + 1, ETH_ADDR_LEN); | |
685a51a5 JP |
371 | } else { |
372 | goto invalid; | |
373 | } | |
374 | } | |
375 | ||
419681da | 376 | if (OVS_UNLIKELY(!data_try_pull(datap, sizep, opt_len))) { |
685a51a5 JP |
377 | goto invalid; |
378 | } | |
685a51a5 JP |
379 | } |
380 | } | |
381 | ||
419681da | 382 | return true; |
685a51a5 JP |
383 | |
384 | invalid: | |
419681da | 385 | return false; |
685a51a5 JP |
386 | } |
387 | ||
b5e7e61a | 388 | /* Initializes 'flow' members from 'packet' and 'md' |
deedf7e7 | 389 | * |
437d0d22 JR |
390 | * Initializes 'packet' header l2 pointer to the start of the Ethernet |
391 | * header, and the layer offsets as follows: | |
ca78c6b6 | 392 | * |
437d0d22 JR |
393 | * - packet->l2_5_ofs to the start of the MPLS shim header, or UINT16_MAX |
394 | * when there is no MPLS shim header. | |
ca78c6b6 | 395 | * |
437d0d22 | 396 | * - packet->l3_ofs to just past the Ethernet header, or just past the |
ca78c6b6 | 397 | * vlan_header if one is present, to the first byte of the payload of the |
437d0d22 JR |
398 | * Ethernet frame. UINT16_MAX if the frame is too short to contain an |
399 | * Ethernet header. | |
ca78c6b6 | 400 | * |
437d0d22 JR |
401 | * - packet->l4_ofs to just past the IPv4 header, if one is present and |
402 | * has at least the content used for the fields of interest for the flow, | |
403 | * otherwise UINT16_MAX. | |
ca78c6b6 | 404 | */ |
7257b535 | 405 | void |
b5e7e61a | 406 | flow_extract(struct ofpbuf *packet, const struct pkt_metadata *md, |
296e07ac | 407 | struct flow *flow) |
064af421 | 408 | { |
27bbe15d JR |
409 | struct { |
410 | struct miniflow mf; | |
d70e8c28 | 411 | uint64_t buf[FLOW_U64S]; |
27bbe15d | 412 | } m; |
064af421 BP |
413 | |
414 | COVERAGE_INC(flow_extract); | |
415 | ||
27bbe15d JR |
416 | miniflow_initialize(&m.mf, m.buf); |
417 | miniflow_extract(packet, md, &m.mf); | |
418 | miniflow_expand(&m.mf, flow); | |
419681da | 419 | } |
296e07ac | 420 | |
27bbe15d | 421 | /* Caller is responsible for initializing 'dst' with enough storage for |
d70e8c28 | 422 | * FLOW_U64S * 8 bytes. */ |
419681da JR |
423 | void |
424 | miniflow_extract(struct ofpbuf *packet, const struct pkt_metadata *md, | |
425 | struct miniflow *dst) | |
426 | { | |
427 | void *data = ofpbuf_data(packet); | |
428 | size_t size = ofpbuf_size(packet); | |
d70e8c28 JR |
429 | uint64_t *values = miniflow_values(dst); |
430 | struct mf_ctx mf = { 0, values, values + FLOW_U64S }; | |
419681da | 431 | char *l2; |
419681da JR |
432 | ovs_be16 dl_type; |
433 | uint8_t nw_frag, nw_tos, nw_ttl, nw_proto; | |
434 | ||
435 | /* Metadata. */ | |
b5e7e61a | 436 | if (md) { |
419681da JR |
437 | if (md->tunnel.ip_dst) { |
438 | miniflow_push_words(mf, tunnel, &md->tunnel, | |
d70e8c28 JR |
439 | sizeof md->tunnel / sizeof(uint64_t)); |
440 | } | |
441 | if (md->skb_priority || md->pkt_mark) { | |
442 | miniflow_push_uint32(mf, skb_priority, md->skb_priority); | |
443 | miniflow_push_uint32(mf, pkt_mark, md->pkt_mark); | |
419681da | 444 | } |
d70e8c28 | 445 | miniflow_push_uint32(mf, dp_hash, md->dp_hash); |
419681da | 446 | miniflow_push_uint32(mf, in_port, odp_to_u32(md->in_port.odp_port)); |
d70e8c28 JR |
447 | if (md->recirc_id) { |
448 | miniflow_push_uint32(mf, recirc_id, md->recirc_id); | |
18080541 | 449 | miniflow_pad_to_64(mf, conj_id); |
d70e8c28 | 450 | } |
296e07ac | 451 | } |
064af421 | 452 | |
419681da JR |
453 | /* Initialize packet's layer pointer and offsets. */ |
454 | l2 = data; | |
455 | ofpbuf_set_frame(packet, data); | |
064af421 | 456 | |
419681da JR |
457 | /* Must have full Ethernet header to proceed. */ |
458 | if (OVS_UNLIKELY(size < sizeof(struct eth_header))) { | |
459 | goto out; | |
460 | } else { | |
461 | ovs_be16 vlan_tci; | |
50f06e16 | 462 | |
419681da JR |
463 | /* Link layer. */ |
464 | BUILD_ASSERT(offsetof(struct flow, dl_dst) + 6 | |
465 | == offsetof(struct flow, dl_src)); | |
d70e8c28 | 466 | miniflow_push_macs(mf, dl_dst, data); |
419681da JR |
467 | /* dl_type, vlan_tci. */ |
468 | vlan_tci = parse_vlan(&data, &size); | |
469 | dl_type = parse_ethertype(&data, &size); | |
470 | miniflow_push_be16(mf, dl_type, dl_type); | |
471 | miniflow_push_be16(mf, vlan_tci, vlan_tci); | |
50f06e16 | 472 | } |
50f06e16 | 473 | |
419681da JR |
474 | /* Parse mpls. */ |
475 | if (OVS_UNLIKELY(eth_type_mpls(dl_type))) { | |
476 | int count; | |
477 | const void *mpls = data; | |
478 | ||
479 | packet->l2_5_ofs = (char *)data - l2; | |
480 | count = parse_mpls(&data, &size); | |
d70e8c28 | 481 | miniflow_push_words_32(mf, mpls_lse, mpls, count); |
b02475c5 SH |
482 | } |
483 | ||
ad128cc1 | 484 | /* Network layer. */ |
419681da JR |
485 | packet->l3_ofs = (char *)data - l2; |
486 | ||
487 | nw_frag = 0; | |
488 | if (OVS_LIKELY(dl_type == htons(ETH_TYPE_IP))) { | |
489 | const struct ip_header *nh = data; | |
490 | int ip_len; | |
fa8d9001 | 491 | uint16_t tot_len; |
419681da JR |
492 | |
493 | if (OVS_UNLIKELY(size < IP_HEADER_LEN)) { | |
494 | goto out; | |
495 | } | |
496 | ip_len = IP_IHL(nh->ip_ihl_ver) * 4; | |
497 | ||
498 | if (OVS_UNLIKELY(ip_len < IP_HEADER_LEN)) { | |
499 | goto out; | |
500 | } | |
fa8d9001 JR |
501 | if (OVS_UNLIKELY(size < ip_len)) { |
502 | goto out; | |
503 | } | |
504 | tot_len = ntohs(nh->ip_tot_len); | |
505 | if (OVS_UNLIKELY(tot_len > size)) { | |
506 | goto out; | |
507 | } | |
508 | if (OVS_UNLIKELY(size - tot_len > UINT8_MAX)) { | |
509 | goto out; | |
510 | } | |
511 | ofpbuf_set_l2_pad_size(packet, size - tot_len); | |
512 | size = tot_len; /* Never pull padding. */ | |
419681da JR |
513 | |
514 | /* Push both source and destination address at once. */ | |
d70e8c28 JR |
515 | miniflow_push_words(mf, nw_src, &nh->ip_src, 1); |
516 | ||
517 | miniflow_push_be32(mf, ipv6_label, 0); /* Padding for IPv4. */ | |
419681da JR |
518 | |
519 | nw_tos = nh->ip_tos; | |
520 | nw_ttl = nh->ip_ttl; | |
521 | nw_proto = nh->ip_proto; | |
522 | if (OVS_UNLIKELY(IP_IS_FRAGMENT(nh->ip_frag_off))) { | |
523 | nw_frag = FLOW_NW_FRAG_ANY; | |
524 | if (nh->ip_frag_off & htons(IP_FRAG_OFF_MASK)) { | |
525 | nw_frag |= FLOW_NW_FRAG_LATER; | |
526 | } | |
527 | } | |
419681da | 528 | data_pull(&data, &size, ip_len); |
419681da JR |
529 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { |
530 | const struct ovs_16aligned_ip6_hdr *nh; | |
531 | ovs_be32 tc_flow; | |
fa8d9001 | 532 | uint16_t plen; |
419681da JR |
533 | |
534 | if (OVS_UNLIKELY(size < sizeof *nh)) { | |
535 | goto out; | |
536 | } | |
537 | nh = data_pull(&data, &size, sizeof *nh); | |
538 | ||
fa8d9001 JR |
539 | plen = ntohs(nh->ip6_plen); |
540 | if (OVS_UNLIKELY(plen > size)) { | |
541 | goto out; | |
542 | } | |
543 | /* Jumbo Payload option not supported yet. */ | |
544 | if (OVS_UNLIKELY(size - plen > UINT8_MAX)) { | |
545 | goto out; | |
546 | } | |
547 | ofpbuf_set_l2_pad_size(packet, size - plen); | |
548 | size = plen; /* Never pull padding. */ | |
549 | ||
419681da | 550 | miniflow_push_words(mf, ipv6_src, &nh->ip6_src, |
d70e8c28 | 551 | sizeof nh->ip6_src / 8); |
419681da | 552 | miniflow_push_words(mf, ipv6_dst, &nh->ip6_dst, |
d70e8c28 | 553 | sizeof nh->ip6_dst / 8); |
419681da JR |
554 | |
555 | tc_flow = get_16aligned_be32(&nh->ip6_flow); | |
556 | { | |
557 | ovs_be32 label = tc_flow & htonl(IPV6_LABEL_MASK); | |
d70e8c28 | 558 | miniflow_push_be32(mf, ipv6_label, label); |
419681da JR |
559 | } |
560 | ||
561 | nw_tos = ntohl(tc_flow) >> 20; | |
562 | nw_ttl = nh->ip6_hlim; | |
563 | nw_proto = nh->ip6_nxt; | |
564 | ||
565 | while (1) { | |
566 | if (OVS_LIKELY((nw_proto != IPPROTO_HOPOPTS) | |
567 | && (nw_proto != IPPROTO_ROUTING) | |
568 | && (nw_proto != IPPROTO_DSTOPTS) | |
569 | && (nw_proto != IPPROTO_AH) | |
570 | && (nw_proto != IPPROTO_FRAGMENT))) { | |
571 | /* It's either a terminal header (e.g., TCP, UDP) or one we | |
572 | * don't understand. In either case, we're done with the | |
573 | * packet, so use it to fill in 'nw_proto'. */ | |
574 | break; | |
575 | } | |
576 | ||
577 | /* We only verify that at least 8 bytes of the next header are | |
578 | * available, but many of these headers are longer. Ensure that | |
579 | * accesses within the extension header are within those first 8 | |
580 | * bytes. All extension headers are required to be at least 8 | |
581 | * bytes. */ | |
582 | if (OVS_UNLIKELY(size < 8)) { | |
583 | goto out; | |
7257b535 | 584 | } |
419681da JR |
585 | |
586 | if ((nw_proto == IPPROTO_HOPOPTS) | |
587 | || (nw_proto == IPPROTO_ROUTING) | |
588 | || (nw_proto == IPPROTO_DSTOPTS)) { | |
589 | /* These headers, while different, have the fields we care | |
590 | * about in the same location and with the same | |
591 | * interpretation. */ | |
592 | const struct ip6_ext *ext_hdr = data; | |
593 | nw_proto = ext_hdr->ip6e_nxt; | |
594 | if (OVS_UNLIKELY(!data_try_pull(&data, &size, | |
595 | (ext_hdr->ip6e_len + 1) * 8))) { | |
596 | goto out; | |
597 | } | |
598 | } else if (nw_proto == IPPROTO_AH) { | |
599 | /* A standard AH definition isn't available, but the fields | |
600 | * we care about are in the same location as the generic | |
601 | * option header--only the header length is calculated | |
602 | * differently. */ | |
603 | const struct ip6_ext *ext_hdr = data; | |
604 | nw_proto = ext_hdr->ip6e_nxt; | |
605 | if (OVS_UNLIKELY(!data_try_pull(&data, &size, | |
606 | (ext_hdr->ip6e_len + 2) * 4))) { | |
607 | goto out; | |
608 | } | |
609 | } else if (nw_proto == IPPROTO_FRAGMENT) { | |
610 | const struct ovs_16aligned_ip6_frag *frag_hdr = data; | |
611 | ||
612 | nw_proto = frag_hdr->ip6f_nxt; | |
613 | if (!data_try_pull(&data, &size, sizeof *frag_hdr)) { | |
614 | goto out; | |
615 | } | |
616 | ||
617 | /* We only process the first fragment. */ | |
618 | if (frag_hdr->ip6f_offlg != htons(0)) { | |
619 | nw_frag = FLOW_NW_FRAG_ANY; | |
620 | if ((frag_hdr->ip6f_offlg & IP6F_OFF_MASK) != htons(0)) { | |
621 | nw_frag |= FLOW_NW_FRAG_LATER; | |
622 | nw_proto = IPPROTO_FRAGMENT; | |
623 | break; | |
064af421 | 624 | } |
064af421 | 625 | } |
50f06e16 BP |
626 | } |
627 | } | |
419681da JR |
628 | } else { |
629 | if (dl_type == htons(ETH_TYPE_ARP) || | |
630 | dl_type == htons(ETH_TYPE_RARP)) { | |
631 | uint8_t arp_buf[2][ETH_ADDR_LEN]; | |
632 | const struct arp_eth_header *arp = (const struct arp_eth_header *) | |
633 | data_try_pull(&data, &size, ARP_ETH_HEADER_LEN); | |
634 | ||
635 | if (OVS_LIKELY(arp) && OVS_LIKELY(arp->ar_hrd == htons(1)) | |
636 | && OVS_LIKELY(arp->ar_pro == htons(ETH_TYPE_IP)) | |
637 | && OVS_LIKELY(arp->ar_hln == ETH_ADDR_LEN) | |
638 | && OVS_LIKELY(arp->ar_pln == 4)) { | |
d70e8c28 JR |
639 | miniflow_push_be32(mf, nw_src, |
640 | get_16aligned_be32(&arp->ar_spa)); | |
641 | miniflow_push_be32(mf, nw_dst, | |
642 | get_16aligned_be32(&arp->ar_tpa)); | |
419681da JR |
643 | |
644 | /* We only match on the lower 8 bits of the opcode. */ | |
645 | if (OVS_LIKELY(ntohs(arp->ar_op) <= 0xff)) { | |
d70e8c28 | 646 | miniflow_push_be32(mf, ipv6_label, 0); /* Pad with ARP. */ |
419681da JR |
647 | miniflow_push_be32(mf, nw_frag, htonl(ntohs(arp->ar_op))); |
648 | } | |
d31f1109 | 649 | |
419681da JR |
650 | /* Must be adjacent. */ |
651 | BUILD_ASSERT(offsetof(struct flow, arp_sha) + 6 | |
652 | == offsetof(struct flow, arp_tha)); | |
653 | ||
654 | memcpy(arp_buf[0], arp->ar_sha, ETH_ADDR_LEN); | |
655 | memcpy(arp_buf[1], arp->ar_tha, ETH_ADDR_LEN); | |
d70e8c28 JR |
656 | miniflow_push_macs(mf, arp_sha, arp_buf); |
657 | miniflow_pad_to_64(mf, tcp_flags); | |
419681da | 658 | } |
d31f1109 | 659 | } |
419681da JR |
660 | goto out; |
661 | } | |
662 | ||
663 | packet->l4_ofs = (char *)data - l2; | |
664 | miniflow_push_be32(mf, nw_frag, | |
665 | BYTES_TO_BE32(nw_frag, nw_tos, nw_ttl, nw_proto)); | |
666 | ||
667 | if (OVS_LIKELY(!(nw_frag & FLOW_NW_FRAG_LATER))) { | |
668 | if (OVS_LIKELY(nw_proto == IPPROTO_TCP)) { | |
669 | if (OVS_LIKELY(size >= TCP_HEADER_LEN)) { | |
670 | const struct tcp_header *tcp = data; | |
671 | ||
d70e8c28 | 672 | miniflow_push_be32(mf, arp_tha[2], 0); |
419681da JR |
673 | miniflow_push_be32(mf, tcp_flags, |
674 | TCP_FLAGS_BE32(tcp->tcp_ctl)); | |
675 | miniflow_push_words(mf, tp_src, &tcp->tcp_src, 1); | |
d70e8c28 | 676 | miniflow_pad_to_64(mf, igmp_group_ip4); |
419681da JR |
677 | } |
678 | } else if (OVS_LIKELY(nw_proto == IPPROTO_UDP)) { | |
679 | if (OVS_LIKELY(size >= UDP_HEADER_LEN)) { | |
680 | const struct udp_header *udp = data; | |
681 | ||
682 | miniflow_push_words(mf, tp_src, &udp->udp_src, 1); | |
d70e8c28 | 683 | miniflow_pad_to_64(mf, igmp_group_ip4); |
064af421 | 684 | } |
419681da JR |
685 | } else if (OVS_LIKELY(nw_proto == IPPROTO_SCTP)) { |
686 | if (OVS_LIKELY(size >= SCTP_HEADER_LEN)) { | |
687 | const struct sctp_header *sctp = data; | |
a26ef517 | 688 | |
419681da | 689 | miniflow_push_words(mf, tp_src, &sctp->sctp_src, 1); |
d70e8c28 | 690 | miniflow_pad_to_64(mf, igmp_group_ip4); |
419681da JR |
691 | } |
692 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMP)) { | |
693 | if (OVS_LIKELY(size >= ICMP_HEADER_LEN)) { | |
694 | const struct icmp_header *icmp = data; | |
695 | ||
696 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp_type)); | |
697 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp_code)); | |
d70e8c28 | 698 | miniflow_pad_to_64(mf, igmp_group_ip4); |
419681da | 699 | } |
0e612675 FL |
700 | } else if (OVS_LIKELY(nw_proto == IPPROTO_IGMP)) { |
701 | if (OVS_LIKELY(size >= IGMP_HEADER_LEN)) { | |
702 | const struct igmp_header *igmp = data; | |
703 | ||
704 | miniflow_push_be16(mf, tp_src, htons(igmp->igmp_type)); | |
705 | miniflow_push_be16(mf, tp_dst, htons(igmp->igmp_code)); | |
706 | miniflow_push_be32(mf, igmp_group_ip4, | |
707 | get_16aligned_be32(&igmp->group)); | |
708 | } | |
419681da JR |
709 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMPV6)) { |
710 | if (OVS_LIKELY(size >= sizeof(struct icmp6_hdr))) { | |
711 | const struct in6_addr *nd_target = NULL; | |
712 | uint8_t arp_buf[2][ETH_ADDR_LEN]; | |
713 | const struct icmp6_hdr *icmp = data_pull(&data, &size, | |
714 | sizeof *icmp); | |
715 | memset(arp_buf, 0, sizeof arp_buf); | |
716 | if (OVS_LIKELY(parse_icmpv6(&data, &size, icmp, &nd_target, | |
717 | arp_buf))) { | |
718 | if (nd_target) { | |
719 | miniflow_push_words(mf, nd_target, nd_target, | |
d70e8c28 | 720 | sizeof *nd_target / 8); |
419681da | 721 | } |
d70e8c28 JR |
722 | miniflow_push_macs(mf, arp_sha, arp_buf); |
723 | miniflow_pad_to_64(mf, tcp_flags); | |
419681da JR |
724 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp6_type)); |
725 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp6_code)); | |
d70e8c28 | 726 | miniflow_pad_to_64(mf, igmp_group_ip4); |
419681da JR |
727 | } |
728 | } | |
064af421 BP |
729 | } |
730 | } | |
419681da JR |
731 | out: |
732 | dst->map = mf.map; | |
064af421 BP |
733 | } |
734 | ||
993410fb BP |
735 | /* For every bit of a field that is wildcarded in 'wildcards', sets the |
736 | * corresponding bit in 'flow' to zero. */ | |
737 | void | |
738 | flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards) | |
739 | { | |
d70e8c28 JR |
740 | uint64_t *flow_u64 = (uint64_t *) flow; |
741 | const uint64_t *wc_u64 = (const uint64_t *) &wildcards->masks; | |
659c2346 | 742 | size_t i; |
993410fb | 743 | |
d70e8c28 JR |
744 | for (i = 0; i < FLOW_U64S; i++) { |
745 | flow_u64[i] &= wc_u64[i]; | |
26720e24 | 746 | } |
993410fb BP |
747 | } |
748 | ||
d8d9c698 EJ |
749 | void |
750 | flow_unwildcard_tp_ports(const struct flow *flow, struct flow_wildcards *wc) | |
751 | { | |
752 | if (flow->nw_proto != IPPROTO_ICMP) { | |
753 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
754 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
755 | } else { | |
756 | wc->masks.tp_src = htons(0xff); | |
757 | wc->masks.tp_dst = htons(0xff); | |
758 | } | |
759 | } | |
760 | ||
5d6c3af0 EJ |
761 | /* Initializes 'fmd' with the metadata found in 'flow'. */ |
762 | void | |
763 | flow_get_metadata(const struct flow *flow, struct flow_metadata *fmd) | |
764 | { | |
18080541 | 765 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 30); |
e9358af6 | 766 | |
a79f29f2 AZ |
767 | fmd->dp_hash = flow->dp_hash; |
768 | fmd->recirc_id = flow->recirc_id; | |
296e07ac | 769 | fmd->tun_id = flow->tunnel.tun_id; |
0ad90c84 JR |
770 | fmd->tun_src = flow->tunnel.ip_src; |
771 | fmd->tun_dst = flow->tunnel.ip_dst; | |
969fc56c | 772 | fmd->metadata = flow->metadata; |
5d6c3af0 | 773 | memcpy(fmd->regs, flow->regs, sizeof fmd->regs); |
ac923e91 | 774 | fmd->pkt_mark = flow->pkt_mark; |
4e022ec0 | 775 | fmd->in_port = flow->in_port.ofp_port; |
5d6c3af0 EJ |
776 | } |
777 | ||
064af421 | 778 | char * |
ae412e7d | 779 | flow_to_string(const struct flow *flow) |
064af421 BP |
780 | { |
781 | struct ds ds = DS_EMPTY_INITIALIZER; | |
782 | flow_format(&ds, flow); | |
783 | return ds_cstr(&ds); | |
784 | } | |
785 | ||
4fe3445a PS |
786 | const char * |
787 | flow_tun_flag_to_string(uint32_t flags) | |
788 | { | |
789 | switch (flags) { | |
790 | case FLOW_TNL_F_DONT_FRAGMENT: | |
791 | return "df"; | |
792 | case FLOW_TNL_F_CSUM: | |
793 | return "csum"; | |
794 | case FLOW_TNL_F_KEY: | |
795 | return "key"; | |
94872594 JG |
796 | case FLOW_TNL_F_OAM: |
797 | return "oam"; | |
4fe3445a PS |
798 | default: |
799 | return NULL; | |
800 | } | |
801 | } | |
802 | ||
803 | void | |
804 | format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t), | |
805 | uint32_t flags, char del) | |
806 | { | |
807 | uint32_t bad = 0; | |
808 | ||
809 | if (!flags) { | |
810 | return; | |
811 | } | |
812 | while (flags) { | |
813 | uint32_t bit = rightmost_1bit(flags); | |
814 | const char *s; | |
815 | ||
816 | s = bit_to_string(bit); | |
817 | if (s) { | |
818 | ds_put_format(ds, "%s%c", s, del); | |
819 | } else { | |
820 | bad |= bit; | |
821 | } | |
822 | ||
823 | flags &= ~bit; | |
824 | } | |
825 | ||
826 | if (bad) { | |
827 | ds_put_format(ds, "0x%"PRIx32"%c", bad, del); | |
828 | } | |
829 | ds_chomp(ds, del); | |
830 | } | |
831 | ||
61bf6666 JR |
832 | void |
833 | format_flags_masked(struct ds *ds, const char *name, | |
834 | const char *(*bit_to_string)(uint32_t), uint32_t flags, | |
835 | uint32_t mask) | |
836 | { | |
837 | if (name) { | |
838 | ds_put_format(ds, "%s=", name); | |
839 | } | |
840 | while (mask) { | |
841 | uint32_t bit = rightmost_1bit(mask); | |
842 | const char *s = bit_to_string(bit); | |
843 | ||
844 | ds_put_format(ds, "%s%s", (flags & bit) ? "+" : "-", | |
845 | s ? s : "[Unknown]"); | |
846 | mask &= ~bit; | |
847 | } | |
848 | } | |
849 | ||
064af421 | 850 | void |
ae412e7d | 851 | flow_format(struct ds *ds, const struct flow *flow) |
064af421 | 852 | { |
aa6c9932 | 853 | struct match match; |
78c9486d | 854 | struct flow_wildcards *wc = &match.wc; |
296e07ac | 855 | |
aa6c9932 | 856 | match_wc_init(&match, flow); |
78c9486d JR |
857 | |
858 | /* As this function is most often used for formatting a packet in a | |
859 | * packet-in message, skip formatting the packet context fields that are | |
860 | * all-zeroes (Openflow spec encourages leaving out all-zeroes context | |
861 | * fields from the packet-in messages). We make an exception with the | |
862 | * 'in_port' field, which we always format, as packets usually have an | |
863 | * in_port, and 0 is a port just like any other port. */ | |
864 | if (!flow->skb_priority) { | |
865 | WC_UNMASK_FIELD(wc, skb_priority); | |
866 | } | |
867 | if (!flow->pkt_mark) { | |
868 | WC_UNMASK_FIELD(wc, pkt_mark); | |
869 | } | |
870 | if (!flow->recirc_id) { | |
871 | WC_UNMASK_FIELD(wc, recirc_id); | |
872 | } | |
873 | for (int i = 0; i < FLOW_N_REGS; i++) { | |
874 | if (!flow->regs[i]) { | |
875 | WC_UNMASK_FIELD(wc, regs[i]); | |
876 | } | |
877 | } | |
878 | if (!flow->metadata) { | |
879 | WC_UNMASK_FIELD(wc, metadata); | |
880 | } | |
881 | ||
3f78c3cc | 882 | match_format(&match, ds, OFP_DEFAULT_PRIORITY); |
064af421 BP |
883 | } |
884 | ||
885 | void | |
ae412e7d | 886 | flow_print(FILE *stream, const struct flow *flow) |
064af421 BP |
887 | { |
888 | char *s = flow_to_string(flow); | |
889 | fputs(s, stream); | |
890 | free(s); | |
891 | } | |
54363004 BP |
892 | \f |
893 | /* flow_wildcards functions. */ | |
894 | ||
d8ae4d67 | 895 | /* Initializes 'wc' as a set of wildcards that matches every packet. */ |
54363004 | 896 | void |
d8ae4d67 | 897 | flow_wildcards_init_catchall(struct flow_wildcards *wc) |
54363004 | 898 | { |
659c2346 | 899 | memset(&wc->masks, 0, sizeof wc->masks); |
54363004 BP |
900 | } |
901 | ||
78c9486d JR |
902 | /* Converts a flow into flow wildcards. It sets the wildcard masks based on |
903 | * the packet headers extracted to 'flow'. It will not set the mask for fields | |
904 | * that do not make sense for the packet type. OpenFlow-only metadata is | |
905 | * wildcarded, but other metadata is unconditionally exact-matched. */ | |
906 | void flow_wildcards_init_for_packet(struct flow_wildcards *wc, | |
907 | const struct flow *flow) | |
908 | { | |
909 | memset(&wc->masks, 0x0, sizeof wc->masks); | |
910 | ||
0de8783a | 911 | /* Update this function whenever struct flow changes. */ |
18080541 | 912 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 30); |
0de8783a | 913 | |
78c9486d JR |
914 | if (flow->tunnel.ip_dst) { |
915 | if (flow->tunnel.flags & FLOW_TNL_F_KEY) { | |
916 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
917 | } | |
918 | WC_MASK_FIELD(wc, tunnel.ip_src); | |
919 | WC_MASK_FIELD(wc, tunnel.ip_dst); | |
920 | WC_MASK_FIELD(wc, tunnel.flags); | |
921 | WC_MASK_FIELD(wc, tunnel.ip_tos); | |
922 | WC_MASK_FIELD(wc, tunnel.ip_ttl); | |
923 | WC_MASK_FIELD(wc, tunnel.tp_src); | |
924 | WC_MASK_FIELD(wc, tunnel.tp_dst); | |
925 | } else if (flow->tunnel.tun_id) { | |
926 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
927 | } | |
928 | ||
18080541 | 929 | /* metadata, regs, and conj_id wildcarded. */ |
78c9486d JR |
930 | |
931 | WC_MASK_FIELD(wc, skb_priority); | |
932 | WC_MASK_FIELD(wc, pkt_mark); | |
933 | WC_MASK_FIELD(wc, recirc_id); | |
934 | WC_MASK_FIELD(wc, dp_hash); | |
935 | WC_MASK_FIELD(wc, in_port); | |
936 | ||
c61f3870 BP |
937 | /* actset_output wildcarded. */ |
938 | ||
78c9486d JR |
939 | WC_MASK_FIELD(wc, dl_dst); |
940 | WC_MASK_FIELD(wc, dl_src); | |
941 | WC_MASK_FIELD(wc, dl_type); | |
942 | WC_MASK_FIELD(wc, vlan_tci); | |
943 | ||
944 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
945 | WC_MASK_FIELD(wc, nw_src); | |
946 | WC_MASK_FIELD(wc, nw_dst); | |
947 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
948 | WC_MASK_FIELD(wc, ipv6_src); | |
949 | WC_MASK_FIELD(wc, ipv6_dst); | |
950 | WC_MASK_FIELD(wc, ipv6_label); | |
951 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || | |
952 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
953 | WC_MASK_FIELD(wc, nw_src); | |
954 | WC_MASK_FIELD(wc, nw_dst); | |
955 | WC_MASK_FIELD(wc, nw_proto); | |
956 | WC_MASK_FIELD(wc, arp_sha); | |
957 | WC_MASK_FIELD(wc, arp_tha); | |
958 | return; | |
959 | } else if (eth_type_mpls(flow->dl_type)) { | |
960 | for (int i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { | |
961 | WC_MASK_FIELD(wc, mpls_lse[i]); | |
962 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
963 | break; | |
964 | } | |
965 | } | |
966 | return; | |
967 | } else { | |
968 | return; /* Unknown ethertype. */ | |
969 | } | |
970 | ||
971 | /* IPv4 or IPv6. */ | |
972 | WC_MASK_FIELD(wc, nw_frag); | |
973 | WC_MASK_FIELD(wc, nw_tos); | |
974 | WC_MASK_FIELD(wc, nw_ttl); | |
975 | WC_MASK_FIELD(wc, nw_proto); | |
976 | ||
977 | /* No transport layer header in later fragments. */ | |
978 | if (!(flow->nw_frag & FLOW_NW_FRAG_LATER) && | |
979 | (flow->nw_proto == IPPROTO_ICMP || | |
980 | flow->nw_proto == IPPROTO_ICMPV6 || | |
981 | flow->nw_proto == IPPROTO_TCP || | |
982 | flow->nw_proto == IPPROTO_UDP || | |
983 | flow->nw_proto == IPPROTO_SCTP || | |
984 | flow->nw_proto == IPPROTO_IGMP)) { | |
985 | WC_MASK_FIELD(wc, tp_src); | |
986 | WC_MASK_FIELD(wc, tp_dst); | |
987 | ||
988 | if (flow->nw_proto == IPPROTO_TCP) { | |
989 | WC_MASK_FIELD(wc, tcp_flags); | |
990 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { | |
991 | WC_MASK_FIELD(wc, arp_sha); | |
992 | WC_MASK_FIELD(wc, arp_tha); | |
993 | WC_MASK_FIELD(wc, nd_target); | |
994 | } else if (flow->nw_proto == IPPROTO_IGMP) { | |
995 | WC_MASK_FIELD(wc, igmp_group_ip4); | |
996 | } | |
997 | } | |
998 | } | |
999 | ||
0de8783a JR |
1000 | /* Return a map of possible fields for a packet of the same type as 'flow'. |
1001 | * Including extra bits in the returned mask is not wrong, it is just less | |
1002 | * optimal. | |
1003 | * | |
1004 | * This is a less precise version of flow_wildcards_init_for_packet() above. */ | |
1005 | uint64_t | |
1006 | flow_wc_map(const struct flow *flow) | |
1007 | { | |
1008 | /* Update this function whenever struct flow changes. */ | |
18080541 | 1009 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 30); |
0de8783a JR |
1010 | |
1011 | uint64_t map = (flow->tunnel.ip_dst) ? MINIFLOW_MAP(tunnel) : 0; | |
1012 | ||
1013 | /* Metadata fields that can appear on packet input. */ | |
1014 | map |= MINIFLOW_MAP(skb_priority) | MINIFLOW_MAP(pkt_mark) | |
1015 | | MINIFLOW_MAP(recirc_id) | MINIFLOW_MAP(dp_hash) | |
1016 | | MINIFLOW_MAP(in_port) | |
1017 | | MINIFLOW_MAP(dl_dst) | MINIFLOW_MAP(dl_src) | |
1018 | | MINIFLOW_MAP(dl_type) | MINIFLOW_MAP(vlan_tci); | |
1019 | ||
1020 | /* Ethertype-dependent fields. */ | |
1021 | if (OVS_LIKELY(flow->dl_type == htons(ETH_TYPE_IP))) { | |
1022 | map |= MINIFLOW_MAP(nw_src) | MINIFLOW_MAP(nw_dst) | |
1023 | | MINIFLOW_MAP(nw_proto) | MINIFLOW_MAP(nw_frag) | |
1024 | | MINIFLOW_MAP(nw_tos) | MINIFLOW_MAP(nw_ttl); | |
1025 | if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_IGMP)) { | |
1026 | map |= MINIFLOW_MAP(igmp_group_ip4); | |
1027 | } else { | |
1028 | map |= MINIFLOW_MAP(tcp_flags) | |
1029 | | MINIFLOW_MAP(tp_src) | MINIFLOW_MAP(tp_dst); | |
1030 | } | |
1031 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1032 | map |= MINIFLOW_MAP(ipv6_src) | MINIFLOW_MAP(ipv6_dst) | |
1033 | | MINIFLOW_MAP(ipv6_label) | |
1034 | | MINIFLOW_MAP(nw_proto) | MINIFLOW_MAP(nw_frag) | |
1035 | | MINIFLOW_MAP(nw_tos) | MINIFLOW_MAP(nw_ttl); | |
1036 | if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_ICMPV6)) { | |
1037 | map |= MINIFLOW_MAP(nd_target) | |
1038 | | MINIFLOW_MAP(arp_sha) | MINIFLOW_MAP(arp_tha); | |
1039 | } else { | |
1040 | map |= MINIFLOW_MAP(tcp_flags) | |
1041 | | MINIFLOW_MAP(tp_src) | MINIFLOW_MAP(tp_dst); | |
1042 | } | |
1043 | } else if (eth_type_mpls(flow->dl_type)) { | |
1044 | map |= MINIFLOW_MAP(mpls_lse); | |
1045 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || | |
1046 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
1047 | map |= MINIFLOW_MAP(nw_src) | MINIFLOW_MAP(nw_dst) | |
1048 | | MINIFLOW_MAP(nw_proto) | |
1049 | | MINIFLOW_MAP(arp_sha) | MINIFLOW_MAP(arp_tha); | |
1050 | } | |
1051 | ||
1052 | return map; | |
1053 | } | |
1054 | ||
c11c6faa AZ |
1055 | /* Clear the metadata and register wildcard masks. They are not packet |
1056 | * header fields. */ | |
1057 | void | |
1058 | flow_wildcards_clear_non_packet_fields(struct flow_wildcards *wc) | |
1059 | { | |
0de8783a | 1060 | /* Update this function whenever struct flow changes. */ |
18080541 | 1061 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 30); |
0de8783a | 1062 | |
c11c6faa AZ |
1063 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
1064 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
c61f3870 | 1065 | wc->masks.actset_output = 0; |
18080541 | 1066 | wc->masks.conj_id = 0; |
c11c6faa AZ |
1067 | } |
1068 | ||
ecf1e7ac BP |
1069 | /* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or |
1070 | * fields. */ | |
1071 | bool | |
1072 | flow_wildcards_is_catchall(const struct flow_wildcards *wc) | |
1073 | { | |
d70e8c28 | 1074 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
659c2346 | 1075 | size_t i; |
ecf1e7ac | 1076 | |
d70e8c28 JR |
1077 | for (i = 0; i < FLOW_U64S; i++) { |
1078 | if (wc_u64[i]) { | |
ecf1e7ac BP |
1079 | return false; |
1080 | } | |
1081 | } | |
ecf1e7ac BP |
1082 | return true; |
1083 | } | |
1084 | ||
368eefac EJ |
1085 | /* Sets 'dst' as the bitwise AND of wildcards in 'src1' and 'src2'. |
1086 | * That is, a bit or a field is wildcarded in 'dst' if it is wildcarded | |
1087 | * in 'src1' or 'src2' or both. */ | |
b5d97350 | 1088 | void |
368eefac EJ |
1089 | flow_wildcards_and(struct flow_wildcards *dst, |
1090 | const struct flow_wildcards *src1, | |
1091 | const struct flow_wildcards *src2) | |
b5d97350 | 1092 | { |
d70e8c28 JR |
1093 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1094 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1095 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
659c2346 | 1096 | size_t i; |
a79c50f3 | 1097 | |
d70e8c28 JR |
1098 | for (i = 0; i < FLOW_U64S; i++) { |
1099 | dst_u64[i] = src1_u64[i] & src2_u64[i]; | |
26720e24 | 1100 | } |
b5d97350 BP |
1101 | } |
1102 | ||
368eefac EJ |
1103 | /* Sets 'dst' as the bitwise OR of wildcards in 'src1' and 'src2'. That |
1104 | * is, a bit or a field is wildcarded in 'dst' if it is neither | |
1105 | * wildcarded in 'src1' nor 'src2'. */ | |
1106 | void | |
1107 | flow_wildcards_or(struct flow_wildcards *dst, | |
1108 | const struct flow_wildcards *src1, | |
1109 | const struct flow_wildcards *src2) | |
1110 | { | |
d70e8c28 JR |
1111 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1112 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1113 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
368eefac EJ |
1114 | size_t i; |
1115 | ||
d70e8c28 JR |
1116 | for (i = 0; i < FLOW_U64S; i++) { |
1117 | dst_u64[i] = src1_u64[i] | src2_u64[i]; | |
368eefac EJ |
1118 | } |
1119 | } | |
1120 | ||
b5d97350 BP |
1121 | /* Returns a hash of the wildcards in 'wc'. */ |
1122 | uint32_t | |
1006cda6 | 1123 | flow_wildcards_hash(const struct flow_wildcards *wc, uint32_t basis) |
b5d97350 | 1124 | { |
ac31c5af | 1125 | return flow_hash(&wc->masks, basis); |
b5d97350 BP |
1126 | } |
1127 | ||
1128 | /* Returns true if 'a' and 'b' represent the same wildcards, false if they are | |
1129 | * different. */ | |
1130 | bool | |
1131 | flow_wildcards_equal(const struct flow_wildcards *a, | |
1132 | const struct flow_wildcards *b) | |
1133 | { | |
659c2346 | 1134 | return flow_equal(&a->masks, &b->masks); |
b5d97350 BP |
1135 | } |
1136 | ||
1137 | /* Returns true if at least one bit or field is wildcarded in 'a' but not in | |
1138 | * 'b', false otherwise. */ | |
1139 | bool | |
1140 | flow_wildcards_has_extra(const struct flow_wildcards *a, | |
1141 | const struct flow_wildcards *b) | |
1142 | { | |
d70e8c28 JR |
1143 | const uint64_t *a_u64 = (const uint64_t *) &a->masks; |
1144 | const uint64_t *b_u64 = (const uint64_t *) &b->masks; | |
659c2346 | 1145 | size_t i; |
a79c50f3 | 1146 | |
d70e8c28 JR |
1147 | for (i = 0; i < FLOW_U64S; i++) { |
1148 | if ((a_u64[i] & b_u64[i]) != b_u64[i]) { | |
b6c9e612 BP |
1149 | return true; |
1150 | } | |
1151 | } | |
659c2346 BP |
1152 | return false; |
1153 | } | |
b6c9e612 | 1154 | |
659c2346 BP |
1155 | /* Returns true if 'a' and 'b' are equal, except that 0-bits (wildcarded bits) |
1156 | * in 'wc' do not need to be equal in 'a' and 'b'. */ | |
1157 | bool | |
1158 | flow_equal_except(const struct flow *a, const struct flow *b, | |
1159 | const struct flow_wildcards *wc) | |
1160 | { | |
d70e8c28 JR |
1161 | const uint64_t *a_u64 = (const uint64_t *) a; |
1162 | const uint64_t *b_u64 = (const uint64_t *) b; | |
1163 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; | |
659c2346 | 1164 | size_t i; |
d31f1109 | 1165 | |
d70e8c28 JR |
1166 | for (i = 0; i < FLOW_U64S; i++) { |
1167 | if ((a_u64[i] ^ b_u64[i]) & wc_u64[i]) { | |
659c2346 BP |
1168 | return false; |
1169 | } | |
47284b1f | 1170 | } |
659c2346 | 1171 | return true; |
b5d97350 BP |
1172 | } |
1173 | ||
b6c9e612 BP |
1174 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1175 | * (A 0-bit indicates a wildcard bit.) */ | |
1176 | void | |
1177 | flow_wildcards_set_reg_mask(struct flow_wildcards *wc, int idx, uint32_t mask) | |
1178 | { | |
26720e24 | 1179 | wc->masks.regs[idx] = mask; |
b6c9e612 | 1180 | } |
ff55ea1f | 1181 | |
79fe0f46 BP |
1182 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1183 | * (A 0-bit indicates a wildcard bit.) */ | |
1184 | void | |
1185 | flow_wildcards_set_xreg_mask(struct flow_wildcards *wc, int idx, uint64_t mask) | |
1186 | { | |
1187 | flow_set_xreg(&wc->masks, idx, mask); | |
1188 | } | |
1189 | ||
28a560d9 JR |
1190 | /* Calculates the 5-tuple hash from the given miniflow. |
1191 | * This returns the same value as flow_hash_5tuple for the corresponding | |
1192 | * flow. */ | |
4f150744 JR |
1193 | uint32_t |
1194 | miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis) | |
1195 | { | |
28a560d9 | 1196 | uint32_t hash = basis; |
4f150744 | 1197 | |
28a560d9 JR |
1198 | if (flow) { |
1199 | ovs_be16 dl_type = MINIFLOW_GET_BE16(flow, dl_type); | |
1200 | ||
33c6a1b9 | 1201 | hash = hash_add(hash, MINIFLOW_GET_U8(flow, nw_proto)); |
28a560d9 JR |
1202 | |
1203 | /* Separate loops for better optimization. */ | |
1204 | if (dl_type == htons(ETH_TYPE_IPV6)) { | |
d70e8c28 JR |
1205 | uint64_t map = MINIFLOW_MAP(ipv6_src) | MINIFLOW_MAP(ipv6_dst); |
1206 | uint64_t value; | |
4f150744 | 1207 | |
28a560d9 | 1208 | MINIFLOW_FOR_EACH_IN_MAP(value, flow, map) { |
d70e8c28 | 1209 | hash = hash_add64(hash, value); |
28a560d9 JR |
1210 | } |
1211 | } else { | |
d70e8c28 JR |
1212 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_src)); |
1213 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_dst)); | |
28a560d9 | 1214 | } |
d70e8c28 JR |
1215 | /* Add both ports at once. */ |
1216 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, tp_src)); | |
33c6a1b9 | 1217 | hash = hash_finish(hash, 42); /* Arbitrary number. */ |
28a560d9 JR |
1218 | } |
1219 | return hash; | |
4f150744 JR |
1220 | } |
1221 | ||
1222 | BUILD_ASSERT_DECL(offsetof(struct flow, tp_src) + 2 | |
1223 | == offsetof(struct flow, tp_dst) && | |
1224 | offsetof(struct flow, tp_src) / 4 | |
1225 | == offsetof(struct flow, tp_dst) / 4); | |
28a560d9 JR |
1226 | BUILD_ASSERT_DECL(offsetof(struct flow, ipv6_src) + 16 |
1227 | == offsetof(struct flow, ipv6_dst)); | |
4f150744 | 1228 | |
63be20be AW |
1229 | /* Calculates the 5-tuple hash from the given flow. */ |
1230 | uint32_t | |
1231 | flow_hash_5tuple(const struct flow *flow, uint32_t basis) | |
1232 | { | |
28a560d9 | 1233 | uint32_t hash = basis; |
63be20be | 1234 | |
28a560d9 | 1235 | if (flow) { |
33c6a1b9 | 1236 | hash = hash_add(hash, flow->nw_proto); |
28a560d9 JR |
1237 | |
1238 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
d70e8c28 JR |
1239 | const uint64_t *flow_u64 = (const uint64_t *)flow; |
1240 | int ofs = offsetof(struct flow, ipv6_src) / 8; | |
1241 | int end = ofs + 2 * sizeof flow->ipv6_src / 8; | |
63be20be | 1242 | |
d70e8c28 JR |
1243 | for (;ofs < end; ofs++) { |
1244 | hash = hash_add64(hash, flow_u64[ofs]); | |
28a560d9 JR |
1245 | } |
1246 | } else { | |
33c6a1b9 JR |
1247 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_src); |
1248 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_dst); | |
28a560d9 | 1249 | } |
d70e8c28 JR |
1250 | /* Add both ports at once. */ |
1251 | hash = hash_add(hash, | |
1252 | ((const uint32_t *)flow)[offsetof(struct flow, tp_src) | |
1253 | / sizeof(uint32_t)]); | |
33c6a1b9 | 1254 | hash = hash_finish(hash, 42); /* Arbitrary number. */ |
28a560d9 JR |
1255 | } |
1256 | return hash; | |
63be20be AW |
1257 | } |
1258 | ||
ff55ea1f EJ |
1259 | /* Hashes 'flow' based on its L2 through L4 protocol information. */ |
1260 | uint32_t | |
1261 | flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis) | |
1262 | { | |
1263 | struct { | |
d31f1109 JP |
1264 | union { |
1265 | ovs_be32 ipv4_addr; | |
1266 | struct in6_addr ipv6_addr; | |
1267 | }; | |
ff55ea1f EJ |
1268 | ovs_be16 eth_type; |
1269 | ovs_be16 vlan_tci; | |
5b909cbb | 1270 | ovs_be16 tp_port; |
ff55ea1f EJ |
1271 | uint8_t eth_addr[ETH_ADDR_LEN]; |
1272 | uint8_t ip_proto; | |
1273 | } fields; | |
1274 | ||
1275 | int i; | |
1276 | ||
1277 | memset(&fields, 0, sizeof fields); | |
1278 | for (i = 0; i < ETH_ADDR_LEN; i++) { | |
1279 | fields.eth_addr[i] = flow->dl_src[i] ^ flow->dl_dst[i]; | |
1280 | } | |
1281 | fields.vlan_tci = flow->vlan_tci & htons(VLAN_VID_MASK); | |
1282 | fields.eth_type = flow->dl_type; | |
3e3eda95 EJ |
1283 | |
1284 | /* UDP source and destination port are not taken into account because they | |
1285 | * will not necessarily be symmetric in a bidirectional flow. */ | |
ff55ea1f | 1286 | if (fields.eth_type == htons(ETH_TYPE_IP)) { |
d31f1109 JP |
1287 | fields.ipv4_addr = flow->nw_src ^ flow->nw_dst; |
1288 | fields.ip_proto = flow->nw_proto; | |
c6bcb685 | 1289 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 1290 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
d31f1109 JP |
1291 | } |
1292 | } else if (fields.eth_type == htons(ETH_TYPE_IPV6)) { | |
1293 | const uint8_t *a = &flow->ipv6_src.s6_addr[0]; | |
1294 | const uint8_t *b = &flow->ipv6_dst.s6_addr[0]; | |
1295 | uint8_t *ipv6_addr = &fields.ipv6_addr.s6_addr[0]; | |
1296 | ||
1297 | for (i=0; i<16; i++) { | |
1298 | ipv6_addr[i] = a[i] ^ b[i]; | |
1299 | } | |
ff55ea1f | 1300 | fields.ip_proto = flow->nw_proto; |
c6bcb685 | 1301 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 1302 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
ff55ea1f | 1303 | } |
ff55ea1f | 1304 | } |
c49d1dd1 | 1305 | return jhash_bytes(&fields, sizeof fields, basis); |
ff55ea1f | 1306 | } |
520e9a2a | 1307 | |
94639963 JR |
1308 | /* Initialize a flow with random fields that matter for nx_hash_fields. */ |
1309 | void | |
1310 | flow_random_hash_fields(struct flow *flow) | |
1311 | { | |
1312 | uint16_t rnd = random_uint16(); | |
1313 | ||
1314 | /* Initialize to all zeros. */ | |
1315 | memset(flow, 0, sizeof *flow); | |
1316 | ||
1317 | eth_addr_random(flow->dl_src); | |
1318 | eth_addr_random(flow->dl_dst); | |
1319 | ||
1320 | flow->vlan_tci = (OVS_FORCE ovs_be16) (random_uint16() & VLAN_VID_MASK); | |
1321 | ||
1322 | /* Make most of the random flows IPv4, some IPv6, and rest random. */ | |
1323 | flow->dl_type = rnd < 0x8000 ? htons(ETH_TYPE_IP) : | |
1324 | rnd < 0xc000 ? htons(ETH_TYPE_IPV6) : (OVS_FORCE ovs_be16)rnd; | |
1325 | ||
1326 | if (dl_type_is_ip_any(flow->dl_type)) { | |
1327 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1328 | flow->nw_src = (OVS_FORCE ovs_be32)random_uint32(); | |
1329 | flow->nw_dst = (OVS_FORCE ovs_be32)random_uint32(); | |
1330 | } else { | |
1331 | random_bytes(&flow->ipv6_src, sizeof flow->ipv6_src); | |
1332 | random_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst); | |
1333 | } | |
1334 | /* Make most of IP flows TCP, some UDP or SCTP, and rest random. */ | |
1335 | rnd = random_uint16(); | |
1336 | flow->nw_proto = rnd < 0x8000 ? IPPROTO_TCP : | |
1337 | rnd < 0xc000 ? IPPROTO_UDP : | |
1338 | rnd < 0xd000 ? IPPROTO_SCTP : (uint8_t)rnd; | |
1339 | if (flow->nw_proto == IPPROTO_TCP || | |
1340 | flow->nw_proto == IPPROTO_UDP || | |
1341 | flow->nw_proto == IPPROTO_SCTP) { | |
1342 | flow->tp_src = (OVS_FORCE ovs_be16)random_uint16(); | |
1343 | flow->tp_dst = (OVS_FORCE ovs_be16)random_uint16(); | |
1344 | } | |
1345 | } | |
1346 | } | |
1347 | ||
bcd2633a JP |
1348 | /* Masks the fields in 'wc' that are used by the flow hash 'fields'. */ |
1349 | void | |
6cdd5145 JP |
1350 | flow_mask_hash_fields(const struct flow *flow, struct flow_wildcards *wc, |
1351 | enum nx_hash_fields fields) | |
bcd2633a JP |
1352 | { |
1353 | switch (fields) { | |
1354 | case NX_HASH_FIELDS_ETH_SRC: | |
1355 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
1356 | break; | |
1357 | ||
1358 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
1359 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
1360 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
6cdd5145 JP |
1361 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
1362 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
1363 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
7f8a65ca | 1364 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
6cdd5145 JP |
1365 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); |
1366 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
1367 | } | |
1368 | if (is_ip_any(flow)) { | |
1369 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
d8d9c698 | 1370 | flow_unwildcard_tp_ports(flow, wc); |
6cdd5145 | 1371 | } |
1dd35f8a | 1372 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
bcd2633a JP |
1373 | break; |
1374 | ||
1375 | default: | |
428b2edd | 1376 | OVS_NOT_REACHED(); |
bcd2633a JP |
1377 | } |
1378 | } | |
1379 | ||
520e9a2a EJ |
1380 | /* Hashes the portions of 'flow' designated by 'fields'. */ |
1381 | uint32_t | |
1382 | flow_hash_fields(const struct flow *flow, enum nx_hash_fields fields, | |
1383 | uint16_t basis) | |
1384 | { | |
1385 | switch (fields) { | |
1386 | ||
1387 | case NX_HASH_FIELDS_ETH_SRC: | |
c49d1dd1 | 1388 | return jhash_bytes(flow->dl_src, sizeof flow->dl_src, basis); |
520e9a2a EJ |
1389 | |
1390 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
1391 | return flow_hash_symmetric_l4(flow, basis); | |
1392 | } | |
1393 | ||
428b2edd | 1394 | OVS_NOT_REACHED(); |
520e9a2a EJ |
1395 | } |
1396 | ||
1397 | /* Returns a string representation of 'fields'. */ | |
1398 | const char * | |
1399 | flow_hash_fields_to_str(enum nx_hash_fields fields) | |
1400 | { | |
1401 | switch (fields) { | |
1402 | case NX_HASH_FIELDS_ETH_SRC: return "eth_src"; | |
1403 | case NX_HASH_FIELDS_SYMMETRIC_L4: return "symmetric_l4"; | |
1404 | default: return "<unknown>"; | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | /* Returns true if the value of 'fields' is supported. Otherwise false. */ | |
1409 | bool | |
1410 | flow_hash_fields_valid(enum nx_hash_fields fields) | |
1411 | { | |
1412 | return fields == NX_HASH_FIELDS_ETH_SRC | |
1413 | || fields == NX_HASH_FIELDS_SYMMETRIC_L4; | |
1414 | } | |
8b3b8dd1 | 1415 | |
368eefac EJ |
1416 | /* Returns a hash value for the bits of 'flow' that are active based on |
1417 | * 'wc', given 'basis'. */ | |
1418 | uint32_t | |
1419 | flow_hash_in_wildcards(const struct flow *flow, | |
1420 | const struct flow_wildcards *wc, uint32_t basis) | |
1421 | { | |
d70e8c28 JR |
1422 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
1423 | const uint64_t *flow_u64 = (const uint64_t *) flow; | |
368eefac EJ |
1424 | uint32_t hash; |
1425 | size_t i; | |
1426 | ||
1427 | hash = basis; | |
d70e8c28 JR |
1428 | for (i = 0; i < FLOW_U64S; i++) { |
1429 | hash = hash_add64(hash, flow_u64[i] & wc_u64[i]); | |
368eefac | 1430 | } |
d70e8c28 | 1431 | return hash_finish(hash, 8 * FLOW_U64S); |
368eefac EJ |
1432 | } |
1433 | ||
3719455c BP |
1434 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
1435 | * OpenFlow 1.0 "dl_vlan" value: | |
1436 | * | |
1437 | * - If it is in the range 0...4095, 'flow->vlan_tci' is set to match | |
1438 | * that VLAN. Any existing PCP match is unchanged (it becomes 0 if | |
1439 | * 'flow' previously matched packets without a VLAN header). | |
1440 | * | |
1441 | * - If it is OFP_VLAN_NONE, 'flow->vlan_tci' is set to match a packet | |
1442 | * without a VLAN tag. | |
1443 | * | |
1444 | * - Other values of 'vid' should not be used. */ | |
1445 | void | |
fb0451d9 | 1446 | flow_set_dl_vlan(struct flow *flow, ovs_be16 vid) |
3719455c | 1447 | { |
0c436519 | 1448 | if (vid == htons(OFP10_VLAN_NONE)) { |
3719455c BP |
1449 | flow->vlan_tci = htons(0); |
1450 | } else { | |
1451 | vid &= htons(VLAN_VID_MASK); | |
1452 | flow->vlan_tci &= ~htons(VLAN_VID_MASK); | |
1453 | flow->vlan_tci |= htons(VLAN_CFI) | vid; | |
1454 | } | |
1455 | } | |
1456 | ||
cc34bc8c BP |
1457 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
1458 | * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID | |
1459 | * plus CFI). */ | |
1460 | void | |
1461 | flow_set_vlan_vid(struct flow *flow, ovs_be16 vid) | |
1462 | { | |
1463 | ovs_be16 mask = htons(VLAN_VID_MASK | VLAN_CFI); | |
1464 | flow->vlan_tci &= ~mask; | |
1465 | flow->vlan_tci |= vid & mask; | |
1466 | } | |
1467 | ||
3719455c BP |
1468 | /* Sets the VLAN PCP that 'flow' matches to 'pcp', which should be in the |
1469 | * range 0...7. | |
1470 | * | |
1471 | * This function has no effect on the VLAN ID that 'flow' matches. | |
1472 | * | |
1473 | * After calling this function, 'flow' will not match packets without a VLAN | |
1474 | * header. */ | |
1475 | void | |
1476 | flow_set_vlan_pcp(struct flow *flow, uint8_t pcp) | |
1477 | { | |
1478 | pcp &= 0x07; | |
1479 | flow->vlan_tci &= ~htons(VLAN_PCP_MASK); | |
1480 | flow->vlan_tci |= htons((pcp << VLAN_PCP_SHIFT) | VLAN_CFI); | |
1481 | } | |
1482 | ||
8bfd0fda BP |
1483 | /* Returns the number of MPLS LSEs present in 'flow' |
1484 | * | |
1485 | * Returns 0 if the 'dl_type' of 'flow' is not an MPLS ethernet type. | |
1486 | * Otherwise traverses 'flow''s MPLS label stack stopping at the | |
1487 | * first entry that has the BoS bit set. If no such entry exists then | |
1488 | * the maximum number of LSEs that can be stored in 'flow' is returned. | |
1489 | */ | |
1490 | int | |
1491 | flow_count_mpls_labels(const struct flow *flow, struct flow_wildcards *wc) | |
1492 | { | |
22d38fca | 1493 | /* dl_type is always masked. */ |
8bfd0fda BP |
1494 | if (eth_type_mpls(flow->dl_type)) { |
1495 | int i; | |
5af43325 | 1496 | int cnt; |
8bfd0fda | 1497 | |
5af43325 PS |
1498 | cnt = 0; |
1499 | for (i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { | |
8bfd0fda BP |
1500 | if (wc) { |
1501 | wc->masks.mpls_lse[i] |= htonl(MPLS_BOS_MASK); | |
1502 | } | |
1503 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
1504 | return i + 1; | |
1505 | } | |
5af43325 PS |
1506 | if (flow->mpls_lse[i]) { |
1507 | cnt++; | |
1508 | } | |
8bfd0fda | 1509 | } |
5af43325 | 1510 | return cnt; |
8bfd0fda BP |
1511 | } else { |
1512 | return 0; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | /* Returns the number consecutive of MPLS LSEs, starting at the | |
1517 | * innermost LSE, that are common in 'a' and 'b'. | |
1518 | * | |
1519 | * 'an' must be flow_count_mpls_labels(a). | |
1520 | * 'bn' must be flow_count_mpls_labels(b). | |
1521 | */ | |
1522 | int | |
1523 | flow_count_common_mpls_labels(const struct flow *a, int an, | |
1524 | const struct flow *b, int bn, | |
1525 | struct flow_wildcards *wc) | |
1526 | { | |
1527 | int min_n = MIN(an, bn); | |
1528 | if (min_n == 0) { | |
1529 | return 0; | |
1530 | } else { | |
1531 | int common_n = 0; | |
1532 | int a_last = an - 1; | |
1533 | int b_last = bn - 1; | |
1534 | int i; | |
1535 | ||
1536 | for (i = 0; i < min_n; i++) { | |
1537 | if (wc) { | |
1538 | wc->masks.mpls_lse[a_last - i] = OVS_BE32_MAX; | |
1539 | wc->masks.mpls_lse[b_last - i] = OVS_BE32_MAX; | |
1540 | } | |
1541 | if (a->mpls_lse[a_last - i] != b->mpls_lse[b_last - i]) { | |
1542 | break; | |
1543 | } else { | |
1544 | common_n++; | |
1545 | } | |
1546 | } | |
1547 | ||
1548 | return common_n; | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | /* Adds a new outermost MPLS label to 'flow' and changes 'flow''s Ethernet type | |
1553 | * to 'mpls_eth_type', which must be an MPLS Ethertype. | |
1554 | * | |
1555 | * If the new label is the first MPLS label in 'flow', it is generated as; | |
1556 | * | |
1557 | * - label: 2, if 'flow' is IPv6, otherwise 0. | |
1558 | * | |
1559 | * - TTL: IPv4 or IPv6 TTL, if present and nonzero, otherwise 64. | |
1560 | * | |
1561 | * - TC: IPv4 or IPv6 TOS, if present, otherwise 0. | |
1562 | * | |
1563 | * - BoS: 1. | |
1564 | * | |
22d38fca | 1565 | * If the new label is the second or later label MPLS label in 'flow', it is |
8bfd0fda BP |
1566 | * generated as; |
1567 | * | |
368fb7e6 | 1568 | * - label: Copied from outer label. |
8bfd0fda BP |
1569 | * |
1570 | * - TTL: Copied from outer label. | |
1571 | * | |
1572 | * - TC: Copied from outer label. | |
1573 | * | |
1574 | * - BoS: 0. | |
1575 | * | |
1576 | * 'n' must be flow_count_mpls_labels(flow). 'n' must be less than | |
1577 | * FLOW_MAX_MPLS_LABELS (because otherwise flow->mpls_lse[] would overflow). | |
1578 | */ | |
1579 | void | |
1580 | flow_push_mpls(struct flow *flow, int n, ovs_be16 mpls_eth_type, | |
1581 | struct flow_wildcards *wc) | |
1582 | { | |
1583 | ovs_assert(eth_type_mpls(mpls_eth_type)); | |
1584 | ovs_assert(n < FLOW_MAX_MPLS_LABELS); | |
1585 | ||
8bfd0fda BP |
1586 | if (n) { |
1587 | int i; | |
1588 | ||
22d38fca JR |
1589 | if (wc) { |
1590 | memset(&wc->masks.mpls_lse, 0xff, sizeof *wc->masks.mpls_lse * n); | |
1591 | } | |
8bfd0fda BP |
1592 | for (i = n; i >= 1; i--) { |
1593 | flow->mpls_lse[i] = flow->mpls_lse[i - 1]; | |
1594 | } | |
22d38fca | 1595 | flow->mpls_lse[0] = (flow->mpls_lse[1] & htonl(~MPLS_BOS_MASK)); |
8bfd0fda BP |
1596 | } else { |
1597 | int label = 0; /* IPv4 Explicit Null. */ | |
1598 | int tc = 0; | |
1599 | int ttl = 64; | |
1600 | ||
1601 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1602 | label = 2; | |
1603 | } | |
1604 | ||
1605 | if (is_ip_any(flow)) { | |
1606 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; | |
22d38fca JR |
1607 | if (wc) { |
1608 | wc->masks.nw_tos |= IP_DSCP_MASK; | |
1609 | wc->masks.nw_ttl = 0xff; | |
1610 | } | |
8bfd0fda BP |
1611 | |
1612 | if (flow->nw_ttl) { | |
1613 | ttl = flow->nw_ttl; | |
1614 | } | |
8bfd0fda BP |
1615 | } |
1616 | ||
1617 | flow->mpls_lse[0] = set_mpls_lse_values(ttl, tc, 1, htonl(label)); | |
1618 | ||
d70e8c28 | 1619 | /* Clear all L3 and L4 fields and dp_hash. */ |
18080541 | 1620 | BUILD_ASSERT(FLOW_WC_SEQ == 30); |
8bfd0fda BP |
1621 | memset((char *) flow + FLOW_SEGMENT_2_ENDS_AT, 0, |
1622 | sizeof(struct flow) - FLOW_SEGMENT_2_ENDS_AT); | |
d70e8c28 | 1623 | flow->dp_hash = 0; |
8bfd0fda BP |
1624 | } |
1625 | flow->dl_type = mpls_eth_type; | |
1626 | } | |
1627 | ||
1628 | /* Tries to remove the outermost MPLS label from 'flow'. Returns true if | |
1629 | * successful, false otherwise. On success, sets 'flow''s Ethernet type to | |
1630 | * 'eth_type'. | |
1631 | * | |
1632 | * 'n' must be flow_count_mpls_labels(flow). */ | |
1633 | bool | |
1634 | flow_pop_mpls(struct flow *flow, int n, ovs_be16 eth_type, | |
1635 | struct flow_wildcards *wc) | |
1636 | { | |
1637 | int i; | |
1638 | ||
1639 | if (n == 0) { | |
1640 | /* Nothing to pop. */ | |
1641 | return false; | |
22d38fca JR |
1642 | } else if (n == FLOW_MAX_MPLS_LABELS) { |
1643 | if (wc) { | |
1644 | wc->masks.mpls_lse[n - 1] |= htonl(MPLS_BOS_MASK); | |
1645 | } | |
1646 | if (!(flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK))) { | |
1647 | /* Can't pop because don't know what to fill in mpls_lse[n - 1]. */ | |
1648 | return false; | |
1649 | } | |
8bfd0fda BP |
1650 | } |
1651 | ||
22d38fca JR |
1652 | if (wc) { |
1653 | memset(&wc->masks.mpls_lse[1], 0xff, | |
1654 | sizeof *wc->masks.mpls_lse * (n - 1)); | |
1655 | } | |
8bfd0fda BP |
1656 | for (i = 1; i < n; i++) { |
1657 | flow->mpls_lse[i - 1] = flow->mpls_lse[i]; | |
1658 | } | |
1659 | flow->mpls_lse[n - 1] = 0; | |
1660 | flow->dl_type = eth_type; | |
1661 | return true; | |
1662 | } | |
1663 | ||
b02475c5 SH |
1664 | /* Sets the MPLS Label that 'flow' matches to 'label', which is interpreted |
1665 | * as an OpenFlow 1.1 "mpls_label" value. */ | |
1666 | void | |
8bfd0fda | 1667 | flow_set_mpls_label(struct flow *flow, int idx, ovs_be32 label) |
b02475c5 | 1668 | { |
8bfd0fda | 1669 | set_mpls_lse_label(&flow->mpls_lse[idx], label); |
b02475c5 SH |
1670 | } |
1671 | ||
b676167a SH |
1672 | /* Sets the MPLS TTL that 'flow' matches to 'ttl', which should be in the |
1673 | * range 0...255. */ | |
1674 | void | |
8bfd0fda | 1675 | flow_set_mpls_ttl(struct flow *flow, int idx, uint8_t ttl) |
b676167a | 1676 | { |
8bfd0fda | 1677 | set_mpls_lse_ttl(&flow->mpls_lse[idx], ttl); |
b676167a SH |
1678 | } |
1679 | ||
b02475c5 SH |
1680 | /* Sets the MPLS TC that 'flow' matches to 'tc', which should be in the |
1681 | * range 0...7. */ | |
1682 | void | |
8bfd0fda | 1683 | flow_set_mpls_tc(struct flow *flow, int idx, uint8_t tc) |
b02475c5 | 1684 | { |
8bfd0fda | 1685 | set_mpls_lse_tc(&flow->mpls_lse[idx], tc); |
b02475c5 SH |
1686 | } |
1687 | ||
1688 | /* Sets the MPLS BOS bit that 'flow' matches to which should be 0 or 1. */ | |
1689 | void | |
8bfd0fda | 1690 | flow_set_mpls_bos(struct flow *flow, int idx, uint8_t bos) |
b02475c5 | 1691 | { |
8bfd0fda | 1692 | set_mpls_lse_bos(&flow->mpls_lse[idx], bos); |
b02475c5 SH |
1693 | } |
1694 | ||
8bfd0fda BP |
1695 | /* Sets the entire MPLS LSE. */ |
1696 | void | |
1697 | flow_set_mpls_lse(struct flow *flow, int idx, ovs_be32 lse) | |
1698 | { | |
1699 | flow->mpls_lse[idx] = lse; | |
1700 | } | |
52105b67 | 1701 | |
437d0d22 | 1702 | static size_t |
52105b67 JR |
1703 | flow_compose_l4(struct ofpbuf *b, const struct flow *flow) |
1704 | { | |
437d0d22 JR |
1705 | size_t l4_len = 0; |
1706 | ||
52105b67 JR |
1707 | if (!(flow->nw_frag & FLOW_NW_FRAG_ANY) |
1708 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) { | |
1709 | if (flow->nw_proto == IPPROTO_TCP) { | |
1710 | struct tcp_header *tcp; | |
1711 | ||
437d0d22 JR |
1712 | l4_len = sizeof *tcp; |
1713 | tcp = ofpbuf_put_zeros(b, l4_len); | |
52105b67 JR |
1714 | tcp->tcp_src = flow->tp_src; |
1715 | tcp->tcp_dst = flow->tp_dst; | |
1716 | tcp->tcp_ctl = TCP_CTL(ntohs(flow->tcp_flags), 5); | |
52105b67 JR |
1717 | } else if (flow->nw_proto == IPPROTO_UDP) { |
1718 | struct udp_header *udp; | |
1719 | ||
437d0d22 JR |
1720 | l4_len = sizeof *udp; |
1721 | udp = ofpbuf_put_zeros(b, l4_len); | |
52105b67 JR |
1722 | udp->udp_src = flow->tp_src; |
1723 | udp->udp_dst = flow->tp_dst; | |
52105b67 JR |
1724 | } else if (flow->nw_proto == IPPROTO_SCTP) { |
1725 | struct sctp_header *sctp; | |
1726 | ||
437d0d22 JR |
1727 | l4_len = sizeof *sctp; |
1728 | sctp = ofpbuf_put_zeros(b, l4_len); | |
52105b67 JR |
1729 | sctp->sctp_src = flow->tp_src; |
1730 | sctp->sctp_dst = flow->tp_dst; | |
52105b67 JR |
1731 | } else if (flow->nw_proto == IPPROTO_ICMP) { |
1732 | struct icmp_header *icmp; | |
1733 | ||
437d0d22 JR |
1734 | l4_len = sizeof *icmp; |
1735 | icmp = ofpbuf_put_zeros(b, l4_len); | |
52105b67 JR |
1736 | icmp->icmp_type = ntohs(flow->tp_src); |
1737 | icmp->icmp_code = ntohs(flow->tp_dst); | |
1738 | icmp->icmp_csum = csum(icmp, ICMP_HEADER_LEN); | |
0e612675 FL |
1739 | } else if (flow->nw_proto == IPPROTO_IGMP) { |
1740 | struct igmp_header *igmp; | |
1741 | ||
1742 | l4_len = sizeof *igmp; | |
1743 | igmp = ofpbuf_put_zeros(b, l4_len); | |
1744 | igmp->igmp_type = ntohs(flow->tp_src); | |
1745 | igmp->igmp_code = ntohs(flow->tp_dst); | |
1746 | put_16aligned_be32(&igmp->group, flow->igmp_group_ip4); | |
1747 | igmp->igmp_csum = csum(igmp, IGMP_HEADER_LEN); | |
52105b67 JR |
1748 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { |
1749 | struct icmp6_hdr *icmp; | |
1750 | ||
437d0d22 JR |
1751 | l4_len = sizeof *icmp; |
1752 | icmp = ofpbuf_put_zeros(b, l4_len); | |
52105b67 JR |
1753 | icmp->icmp6_type = ntohs(flow->tp_src); |
1754 | icmp->icmp6_code = ntohs(flow->tp_dst); | |
1755 | ||
1756 | if (icmp->icmp6_code == 0 && | |
1757 | (icmp->icmp6_type == ND_NEIGHBOR_SOLICIT || | |
1758 | icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) { | |
1759 | struct in6_addr *nd_target; | |
1760 | struct nd_opt_hdr *nd_opt; | |
1761 | ||
437d0d22 | 1762 | l4_len += sizeof *nd_target; |
52105b67 JR |
1763 | nd_target = ofpbuf_put_zeros(b, sizeof *nd_target); |
1764 | *nd_target = flow->nd_target; | |
1765 | ||
1766 | if (!eth_addr_is_zero(flow->arp_sha)) { | |
437d0d22 | 1767 | l4_len += 8; |
52105b67 JR |
1768 | nd_opt = ofpbuf_put_zeros(b, 8); |
1769 | nd_opt->nd_opt_len = 1; | |
1770 | nd_opt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; | |
1771 | memcpy(nd_opt + 1, flow->arp_sha, ETH_ADDR_LEN); | |
1772 | } | |
1773 | if (!eth_addr_is_zero(flow->arp_tha)) { | |
437d0d22 | 1774 | l4_len += 8; |
52105b67 JR |
1775 | nd_opt = ofpbuf_put_zeros(b, 8); |
1776 | nd_opt->nd_opt_len = 1; | |
1777 | nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR; | |
1778 | memcpy(nd_opt + 1, flow->arp_tha, ETH_ADDR_LEN); | |
1779 | } | |
1780 | } | |
1781 | icmp->icmp6_cksum = (OVS_FORCE uint16_t) | |
1782 | csum(icmp, (char *)ofpbuf_tail(b) - (char *)icmp); | |
52105b67 JR |
1783 | } |
1784 | } | |
437d0d22 | 1785 | return l4_len; |
52105b67 JR |
1786 | } |
1787 | ||
8b3b8dd1 BP |
1788 | /* Puts into 'b' a packet that flow_extract() would parse as having the given |
1789 | * 'flow'. | |
1790 | * | |
1791 | * (This is useful only for testing, obviously, and the packet isn't really | |
dc5a7ce7 | 1792 | * valid. It hasn't got some checksums filled in, for one, and lots of fields |
8b3b8dd1 BP |
1793 | * are just zeroed.) */ |
1794 | void | |
1795 | flow_compose(struct ofpbuf *b, const struct flow *flow) | |
1796 | { | |
437d0d22 JR |
1797 | size_t l4_len; |
1798 | ||
52105b67 | 1799 | /* eth_compose() sets l3 pointer and makes sure it is 32-bit aligned. */ |
8b3b8dd1 BP |
1800 | eth_compose(b, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0); |
1801 | if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) { | |
cf3b7538 | 1802 | struct eth_header *eth = ofpbuf_l2(b); |
1f317cb5 | 1803 | eth->eth_type = htons(ofpbuf_size(b)); |
8b3b8dd1 BP |
1804 | return; |
1805 | } | |
1806 | ||
1807 | if (flow->vlan_tci & htons(VLAN_CFI)) { | |
1bf02876 | 1808 | eth_push_vlan(b, htons(ETH_TYPE_VLAN), flow->vlan_tci); |
8b3b8dd1 BP |
1809 | } |
1810 | ||
cff78c88 | 1811 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
8b3b8dd1 BP |
1812 | struct ip_header *ip; |
1813 | ||
52105b67 | 1814 | ip = ofpbuf_put_zeros(b, sizeof *ip); |
8b3b8dd1 | 1815 | ip->ip_ihl_ver = IP_IHL_VER(5, 4); |
eadef313 | 1816 | ip->ip_tos = flow->nw_tos; |
aabf5352 | 1817 | ip->ip_ttl = flow->nw_ttl; |
8b3b8dd1 | 1818 | ip->ip_proto = flow->nw_proto; |
7c457c33 BP |
1819 | put_16aligned_be32(&ip->ip_src, flow->nw_src); |
1820 | put_16aligned_be32(&ip->ip_dst, flow->nw_dst); | |
8b3b8dd1 | 1821 | |
eadef313 | 1822 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
7257b535 | 1823 | ip->ip_frag_off |= htons(IP_MORE_FRAGMENTS); |
eadef313 | 1824 | if (flow->nw_frag & FLOW_NW_FRAG_LATER) { |
7257b535 BP |
1825 | ip->ip_frag_off |= htons(100); |
1826 | } | |
1827 | } | |
df9b6612 | 1828 | |
437d0d22 | 1829 | ofpbuf_set_l4(b, ofpbuf_tail(b)); |
52105b67 | 1830 | |
437d0d22 | 1831 | l4_len = flow_compose_l4(b, flow); |
52105b67 | 1832 | |
1c98d0ad | 1833 | ip = ofpbuf_l3(b); |
437d0d22 | 1834 | ip->ip_tot_len = htons(b->l4_ofs - b->l3_ofs + l4_len); |
dc5a7ce7 | 1835 | ip->ip_csum = csum(ip, sizeof *ip); |
cff78c88 | 1836 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
52105b67 JR |
1837 | struct ovs_16aligned_ip6_hdr *nh; |
1838 | ||
1839 | nh = ofpbuf_put_zeros(b, sizeof *nh); | |
1840 | put_16aligned_be32(&nh->ip6_flow, htonl(6 << 28) | | |
1841 | htonl(flow->nw_tos << 20) | flow->ipv6_label); | |
1842 | nh->ip6_hlim = flow->nw_ttl; | |
1843 | nh->ip6_nxt = flow->nw_proto; | |
1844 | ||
1845 | memcpy(&nh->ip6_src, &flow->ipv6_src, sizeof(nh->ip6_src)); | |
1846 | memcpy(&nh->ip6_dst, &flow->ipv6_dst, sizeof(nh->ip6_dst)); | |
1847 | ||
437d0d22 | 1848 | ofpbuf_set_l4(b, ofpbuf_tail(b)); |
52105b67 | 1849 | |
437d0d22 | 1850 | l4_len = flow_compose_l4(b, flow); |
52105b67 | 1851 | |
1c98d0ad | 1852 | nh = ofpbuf_l3(b); |
437d0d22 | 1853 | nh->ip6_plen = htons(l4_len); |
cff78c88 SH |
1854 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
1855 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
8b3b8dd1 BP |
1856 | struct arp_eth_header *arp; |
1857 | ||
437d0d22 JR |
1858 | arp = ofpbuf_put_zeros(b, sizeof *arp); |
1859 | ofpbuf_set_l3(b, arp); | |
8b3b8dd1 BP |
1860 | arp->ar_hrd = htons(1); |
1861 | arp->ar_pro = htons(ETH_TYPE_IP); | |
1862 | arp->ar_hln = ETH_ADDR_LEN; | |
1863 | arp->ar_pln = 4; | |
1864 | arp->ar_op = htons(flow->nw_proto); | |
1865 | ||
1866 | if (flow->nw_proto == ARP_OP_REQUEST || | |
1867 | flow->nw_proto == ARP_OP_REPLY) { | |
7c457c33 BP |
1868 | put_16aligned_be32(&arp->ar_spa, flow->nw_src); |
1869 | put_16aligned_be32(&arp->ar_tpa, flow->nw_dst); | |
8b3b8dd1 BP |
1870 | memcpy(arp->ar_sha, flow->arp_sha, ETH_ADDR_LEN); |
1871 | memcpy(arp->ar_tha, flow->arp_tha, ETH_ADDR_LEN); | |
1872 | } | |
1873 | } | |
b02475c5 SH |
1874 | |
1875 | if (eth_type_mpls(flow->dl_type)) { | |
8bfd0fda BP |
1876 | int n; |
1877 | ||
437d0d22 | 1878 | b->l2_5_ofs = b->l3_ofs; |
8bfd0fda BP |
1879 | for (n = 1; n < FLOW_MAX_MPLS_LABELS; n++) { |
1880 | if (flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK)) { | |
1881 | break; | |
1882 | } | |
1883 | } | |
1884 | while (n > 0) { | |
1885 | push_mpls(b, flow->dl_type, flow->mpls_lse[--n]); | |
1886 | } | |
b02475c5 | 1887 | } |
8b3b8dd1 | 1888 | } |
5cb7a798 BP |
1889 | \f |
1890 | /* Compressed flow. */ | |
1891 | ||
1892 | static int | |
1893 | miniflow_n_values(const struct miniflow *flow) | |
1894 | { | |
fb9aefa3 | 1895 | return count_1bits(flow->map); |
5cb7a798 BP |
1896 | } |
1897 | ||
d70e8c28 | 1898 | static uint64_t * |
5cb7a798 BP |
1899 | miniflow_alloc_values(struct miniflow *flow, int n) |
1900 | { | |
3016f3e4 JR |
1901 | int size = MINIFLOW_VALUES_SIZE(n); |
1902 | ||
1903 | if (size <= sizeof flow->inline_values) { | |
27bbe15d | 1904 | flow->values_inline = true; |
5cb7a798 BP |
1905 | return flow->inline_values; |
1906 | } else { | |
1907 | COVERAGE_INC(miniflow_malloc); | |
27bbe15d | 1908 | flow->values_inline = false; |
3016f3e4 | 1909 | flow->offline_values = xmalloc(size); |
27bbe15d | 1910 | return flow->offline_values; |
5cb7a798 BP |
1911 | } |
1912 | } | |
1913 | ||
df40c152 BP |
1914 | /* Completes an initialization of 'dst' as a miniflow copy of 'src' begun by |
1915 | * the caller. The caller must have already initialized 'dst->map' properly | |
d70e8c28 | 1916 | * to indicate the significant uint64_t elements of 'src'. 'n' must be the |
13751fd8 JR |
1917 | * number of 1-bits in 'dst->map'. |
1918 | * | |
1919 | * Normally the significant elements are the ones that are non-zero. However, | |
1920 | * when a miniflow is initialized from a (mini)mask, the values can be zeroes, | |
1921 | * so that the flow and mask always have the same maps. | |
df40c152 | 1922 | * |
27bbe15d | 1923 | * This function initializes values (either inline if possible or with |
d70e8c28 | 1924 | * malloc() otherwise) and copies the uint64_t elements of 'src' indicated by |
13751fd8 | 1925 | * 'dst->map' into it. */ |
df40c152 BP |
1926 | static void |
1927 | miniflow_init__(struct miniflow *dst, const struct flow *src, int n) | |
1928 | { | |
d70e8c28 JR |
1929 | const uint64_t *src_u64 = (const uint64_t *) src; |
1930 | uint64_t *dst_u64 = miniflow_alloc_values(dst, n); | |
1cea007c | 1931 | int idx; |
df40c152 | 1932 | |
1cea007c | 1933 | MAP_FOR_EACH_INDEX(idx, dst->map) { |
d70e8c28 | 1934 | *dst_u64++ = src_u64[idx]; |
df40c152 BP |
1935 | } |
1936 | } | |
1937 | ||
5cb7a798 | 1938 | /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst' |
27bbe15d JR |
1939 | * with miniflow_destroy(). |
1940 | * Always allocates offline storage. */ | |
5cb7a798 BP |
1941 | void |
1942 | miniflow_init(struct miniflow *dst, const struct flow *src) | |
1943 | { | |
d70e8c28 | 1944 | const uint64_t *src_u64 = (const uint64_t *) src; |
5cb7a798 BP |
1945 | unsigned int i; |
1946 | int n; | |
1947 | ||
1948 | /* Initialize dst->map, counting the number of nonzero elements. */ | |
1949 | n = 0; | |
080e28d0 JR |
1950 | dst->map = 0; |
1951 | ||
d70e8c28 JR |
1952 | for (i = 0; i < FLOW_U64S; i++) { |
1953 | if (src_u64[i]) { | |
080e28d0 | 1954 | dst->map |= UINT64_C(1) << i; |
5cb7a798 BP |
1955 | n++; |
1956 | } | |
1957 | } | |
1958 | ||
df40c152 BP |
1959 | miniflow_init__(dst, src, n); |
1960 | } | |
5cb7a798 | 1961 | |
df40c152 BP |
1962 | /* Initializes 'dst' as a copy of 'src', using 'mask->map' as 'dst''s map. The |
1963 | * caller must eventually free 'dst' with miniflow_destroy(). */ | |
1964 | void | |
1965 | miniflow_init_with_minimask(struct miniflow *dst, const struct flow *src, | |
1966 | const struct minimask *mask) | |
1967 | { | |
080e28d0 | 1968 | dst->map = mask->masks.map; |
df40c152 | 1969 | miniflow_init__(dst, src, miniflow_n_values(dst)); |
5cb7a798 BP |
1970 | } |
1971 | ||
1972 | /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst' | |
1973 | * with miniflow_destroy(). */ | |
1974 | void | |
1975 | miniflow_clone(struct miniflow *dst, const struct miniflow *src) | |
1976 | { | |
3016f3e4 | 1977 | int size = MINIFLOW_VALUES_SIZE(miniflow_n_values(src)); |
d70e8c28 | 1978 | uint64_t *values; |
3016f3e4 | 1979 | |
080e28d0 | 1980 | dst->map = src->map; |
3016f3e4 JR |
1981 | if (size <= sizeof dst->inline_values) { |
1982 | dst->values_inline = true; | |
1983 | values = dst->inline_values; | |
1984 | } else { | |
1985 | dst->values_inline = false; | |
1986 | COVERAGE_INC(miniflow_malloc); | |
1987 | dst->offline_values = xmalloc(size); | |
1988 | values = dst->offline_values; | |
1989 | } | |
1990 | memcpy(values, miniflow_get_values(src), size); | |
1991 | } | |
1992 | ||
1993 | /* Initializes 'dst' as a copy of 'src'. The caller must have allocated | |
1994 | * 'dst' to have inline space all data in 'src'. */ | |
1995 | void | |
1996 | miniflow_clone_inline(struct miniflow *dst, const struct miniflow *src, | |
1997 | size_t n_values) | |
1998 | { | |
1999 | dst->values_inline = true; | |
2000 | dst->map = src->map; | |
2001 | memcpy(dst->inline_values, miniflow_get_values(src), | |
2002 | MINIFLOW_VALUES_SIZE(n_values)); | |
5cb7a798 BP |
2003 | } |
2004 | ||
b2c1f00b | 2005 | /* Initializes 'dst' with the data in 'src', destroying 'src'. |
3016f3e4 JR |
2006 | * The caller must eventually free 'dst' with miniflow_destroy(). |
2007 | * 'dst' must be regularly sized miniflow, but 'src' can have | |
3c30d111 JR |
2008 | * storage for more than the default MINI_N_INLINE inline |
2009 | * values. */ | |
b2c1f00b BP |
2010 | void |
2011 | miniflow_move(struct miniflow *dst, struct miniflow *src) | |
2012 | { | |
3016f3e4 JR |
2013 | int size = MINIFLOW_VALUES_SIZE(miniflow_n_values(src)); |
2014 | ||
2015 | dst->map = src->map; | |
2016 | if (size <= sizeof dst->inline_values) { | |
2017 | dst->values_inline = true; | |
2018 | memcpy(dst->inline_values, miniflow_get_values(src), size); | |
2019 | miniflow_destroy(src); | |
097673a6 JR |
2020 | } else if (src->values_inline) { |
2021 | dst->values_inline = false; | |
2022 | COVERAGE_INC(miniflow_malloc); | |
2023 | dst->offline_values = xmalloc(size); | |
2024 | memcpy(dst->offline_values, src->inline_values, size); | |
3016f3e4 JR |
2025 | } else { |
2026 | dst->values_inline = false; | |
2027 | dst->offline_values = src->offline_values; | |
2028 | } | |
b2c1f00b BP |
2029 | } |
2030 | ||
5cb7a798 BP |
2031 | /* Frees any memory owned by 'flow'. Does not free the storage in which 'flow' |
2032 | * itself resides; the caller is responsible for that. */ | |
2033 | void | |
2034 | miniflow_destroy(struct miniflow *flow) | |
2035 | { | |
27bbe15d JR |
2036 | if (!flow->values_inline) { |
2037 | free(flow->offline_values); | |
5cb7a798 BP |
2038 | } |
2039 | } | |
2040 | ||
2041 | /* Initializes 'dst' as a copy of 'src'. */ | |
2042 | void | |
2043 | miniflow_expand(const struct miniflow *src, struct flow *dst) | |
2044 | { | |
ad77e3c5 EJ |
2045 | memset(dst, 0, sizeof *dst); |
2046 | flow_union_with_miniflow(dst, src); | |
5cb7a798 BP |
2047 | } |
2048 | ||
8e86f090 | 2049 | /* Returns true if 'a' and 'b' are the equal miniflow, false otherwise. */ |
5cb7a798 BP |
2050 | bool |
2051 | miniflow_equal(const struct miniflow *a, const struct miniflow *b) | |
2052 | { | |
d70e8c28 JR |
2053 | const uint64_t *ap = miniflow_get_values(a); |
2054 | const uint64_t *bp = miniflow_get_values(b); | |
5cb7a798 | 2055 | |
1cea007c | 2056 | if (OVS_LIKELY(a->map == b->map)) { |
27bbe15d JR |
2057 | int count = miniflow_n_values(a); |
2058 | ||
8cc86801 | 2059 | return !memcmp(ap, bp, count * sizeof *ap); |
080e28d0 | 2060 | } else { |
27bbe15d JR |
2061 | uint64_t map; |
2062 | ||
1cea007c | 2063 | for (map = a->map | b->map; map; map = zero_rightmost_1bit(map)) { |
080e28d0 | 2064 | uint64_t bit = rightmost_1bit(map); |
df40c152 | 2065 | |
1cea007c | 2066 | if ((a->map & bit ? *ap++ : 0) != (b->map & bit ? *bp++ : 0)) { |
080e28d0 | 2067 | return false; |
df40c152 | 2068 | } |
5cb7a798 BP |
2069 | } |
2070 | } | |
2071 | ||
df40c152 | 2072 | return true; |
5cb7a798 BP |
2073 | } |
2074 | ||
de4ad4a2 JR |
2075 | /* Returns false if 'a' and 'b' differ at the places where there are 1-bits |
2076 | * in 'mask', true otherwise. */ | |
5cb7a798 BP |
2077 | bool |
2078 | miniflow_equal_in_minimask(const struct miniflow *a, const struct miniflow *b, | |
2079 | const struct minimask *mask) | |
2080 | { | |
d70e8c28 | 2081 | const uint64_t *p = miniflow_get_values(&mask->masks); |
1cea007c | 2082 | int idx; |
5cb7a798 | 2083 | |
1cea007c JR |
2084 | MAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
2085 | if ((miniflow_get(a, idx) ^ miniflow_get(b, idx)) & *p++) { | |
080e28d0 | 2086 | return false; |
5cb7a798 BP |
2087 | } |
2088 | } | |
2089 | ||
2090 | return true; | |
2091 | } | |
2092 | ||
2093 | /* Returns true if 'a' and 'b' are equal at the places where there are 1-bits | |
2094 | * in 'mask', false if they differ. */ | |
2095 | bool | |
2096 | miniflow_equal_flow_in_minimask(const struct miniflow *a, const struct flow *b, | |
2097 | const struct minimask *mask) | |
2098 | { | |
d70e8c28 JR |
2099 | const uint64_t *b_u64 = (const uint64_t *) b; |
2100 | const uint64_t *p = miniflow_get_values(&mask->masks); | |
1cea007c | 2101 | int idx; |
5cb7a798 | 2102 | |
1cea007c | 2103 | MAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
d70e8c28 | 2104 | if ((miniflow_get(a, idx) ^ b_u64[idx]) & *p++) { |
080e28d0 | 2105 | return false; |
5cb7a798 BP |
2106 | } |
2107 | } | |
2108 | ||
2109 | return true; | |
2110 | } | |
2111 | ||
5cb7a798 BP |
2112 | \f |
2113 | /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst' | |
2114 | * with minimask_destroy(). */ | |
2115 | void | |
2116 | minimask_init(struct minimask *mask, const struct flow_wildcards *wc) | |
2117 | { | |
2118 | miniflow_init(&mask->masks, &wc->masks); | |
2119 | } | |
2120 | ||
2121 | /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst' | |
2122 | * with minimask_destroy(). */ | |
2123 | void | |
2124 | minimask_clone(struct minimask *dst, const struct minimask *src) | |
2125 | { | |
2126 | miniflow_clone(&dst->masks, &src->masks); | |
2127 | } | |
2128 | ||
b2c1f00b BP |
2129 | /* Initializes 'dst' with the data in 'src', destroying 'src'. |
2130 | * The caller must eventually free 'dst' with minimask_destroy(). */ | |
2131 | void | |
2132 | minimask_move(struct minimask *dst, struct minimask *src) | |
2133 | { | |
a24de7ee | 2134 | miniflow_move(&dst->masks, &src->masks); |
b2c1f00b BP |
2135 | } |
2136 | ||
5cb7a798 BP |
2137 | /* Initializes 'dst_' as the bit-wise "and" of 'a_' and 'b_'. |
2138 | * | |
d70e8c28 | 2139 | * The caller must provide room for FLOW_U64S "uint64_t"s in 'storage', for use |
5cb7a798 BP |
2140 | * by 'dst_'. The caller must *not* free 'dst_' with minimask_destroy(). */ |
2141 | void | |
2142 | minimask_combine(struct minimask *dst_, | |
2143 | const struct minimask *a_, const struct minimask *b_, | |
d70e8c28 | 2144 | uint64_t storage[FLOW_U64S]) |
5cb7a798 BP |
2145 | { |
2146 | struct miniflow *dst = &dst_->masks; | |
d70e8c28 | 2147 | uint64_t *dst_values = storage; |
5cb7a798 BP |
2148 | const struct miniflow *a = &a_->masks; |
2149 | const struct miniflow *b = &b_->masks; | |
1cea007c | 2150 | int idx; |
5cb7a798 | 2151 | |
27bbe15d JR |
2152 | dst->values_inline = false; |
2153 | dst->offline_values = storage; | |
080e28d0 JR |
2154 | |
2155 | dst->map = 0; | |
1cea007c | 2156 | MAP_FOR_EACH_INDEX(idx, a->map & b->map) { |
03690ebb | 2157 | /* Both 'a' and 'b' have non-zero data at 'idx'. */ |
d70e8c28 | 2158 | uint64_t mask = miniflow_get__(a, idx) & miniflow_get__(b, idx); |
080e28d0 JR |
2159 | |
2160 | if (mask) { | |
1cea007c JR |
2161 | dst->map |= UINT64_C(1) << idx; |
2162 | *dst_values++ = mask; | |
5cb7a798 BP |
2163 | } |
2164 | } | |
2165 | } | |
2166 | ||
2167 | /* Frees any memory owned by 'mask'. Does not free the storage in which 'mask' | |
2168 | * itself resides; the caller is responsible for that. */ | |
2169 | void | |
2170 | minimask_destroy(struct minimask *mask) | |
2171 | { | |
2172 | miniflow_destroy(&mask->masks); | |
2173 | } | |
2174 | ||
2175 | /* Initializes 'dst' as a copy of 'src'. */ | |
2176 | void | |
2177 | minimask_expand(const struct minimask *mask, struct flow_wildcards *wc) | |
2178 | { | |
2179 | miniflow_expand(&mask->masks, &wc->masks); | |
2180 | } | |
2181 | ||
f4d335e9 JR |
2182 | /* Returns true if 'a' and 'b' are the same flow mask, false otherwise. |
2183 | * Minimasks may not have zero data values, so for the minimasks to be the | |
2184 | * same, they need to have the same map and the same data values. */ | |
5cb7a798 BP |
2185 | bool |
2186 | minimask_equal(const struct minimask *a, const struct minimask *b) | |
2187 | { | |
f4d335e9 | 2188 | return a->masks.map == b->masks.map && |
d70e8c28 JR |
2189 | !memcmp(miniflow_get_values(&a->masks), |
2190 | miniflow_get_values(&b->masks), | |
f4d335e9 | 2191 | count_1bits(a->masks.map) * sizeof *a->masks.inline_values); |
5cb7a798 BP |
2192 | } |
2193 | ||
d4570fd8 | 2194 | /* Returns true if at least one bit matched by 'b' is wildcarded by 'a', |
5cb7a798 BP |
2195 | * false otherwise. */ |
2196 | bool | |
d4570fd8 | 2197 | minimask_has_extra(const struct minimask *a, const struct minimask *b) |
5cb7a798 | 2198 | { |
d70e8c28 JR |
2199 | const uint64_t *ap = miniflow_get_values(&a->masks); |
2200 | const uint64_t *bp = miniflow_get_values(&b->masks); | |
f4d335e9 | 2201 | int idx; |
5cb7a798 | 2202 | |
f4d335e9 | 2203 | MAP_FOR_EACH_INDEX(idx, b->masks.map) { |
d70e8c28 | 2204 | uint64_t b_u64 = *bp++; |
5cb7a798 | 2205 | |
d70e8c28 JR |
2206 | /* 'b_u64' is non-zero, check if the data in 'a' is either zero |
2207 | * or misses some of the bits in 'b_u64'. */ | |
f4d335e9 | 2208 | if (!(a->masks.map & (UINT64_C(1) << idx)) |
d70e8c28 JR |
2209 | || ((miniflow_values_get__(ap, a->masks.map, idx) & b_u64) |
2210 | != b_u64)) { | |
f4d335e9 | 2211 | return true; /* 'a' wildcards some bits 'b' doesn't. */ |
5cb7a798 BP |
2212 | } |
2213 | } | |
2214 | ||
2215 | return false; | |
2216 | } |