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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 | ||
ffe4c74f | 126 | #if (FLOW_WC_SEQ != 35) |
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 | 138 | MINIFLOW_ASSERT(!((FM)->bits[(IDX) / MAP_T_BITS] & \ |
e807a1a6 | 139 | (MAP_MAX << ((IDX) % MAP_T_BITS)))); \ |
5fcff47b JR |
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 | |
e807a1a6 SH |
151 | #define miniflow_assert_in_map(MF, OFS) \ |
152 | MINIFLOW_ASSERT(flowmap_is_set(&MF.map, (OFS))); \ | |
5fcff47b JR |
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 | 265 | #define miniflow_pad_to_64(MF, FIELD) \ |
06f41fc4 | 266 | miniflow_pad_to_64_(MF, OFFSETOFEND(struct flow, FIELD)) |
d70e8c28 | 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. */ | |
ffe4c74f | 452 | if (flow_tnl_dst_is_set(&md->tunnel)) { |
cf62fa4c | 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)); | |
07659514 | 480 | if (md->recirc_id || md->ct_state) { |
cf62fa4c | 481 | miniflow_push_uint32(mf, recirc_id, md->recirc_id); |
07659514 JS |
482 | miniflow_push_uint16(mf, ct_state, md->ct_state); |
483 | miniflow_push_uint16(mf, ct_zone, md->ct_zone); | |
296e07ac | 484 | } |
064af421 | 485 | |
8e53fe8c JS |
486 | if (md->ct_state) { |
487 | miniflow_push_uint32(mf, ct_mark, md->ct_mark); | |
06f41fc4 | 488 | miniflow_pad_to_64(mf, ct_mark); |
9daf2348 JS |
489 | |
490 | if (!ovs_u128_is_zero(&md->ct_label)) { | |
491 | miniflow_push_words(mf, ct_label, &md->ct_label, | |
492 | sizeof md->ct_label / sizeof(uint64_t)); | |
493 | } | |
8e53fe8c JS |
494 | } |
495 | ||
419681da JR |
496 | /* Initialize packet's layer pointer and offsets. */ |
497 | l2 = data; | |
82eb5b0a | 498 | dp_packet_reset_offsets(packet); |
064af421 | 499 | |
419681da JR |
500 | /* Must have full Ethernet header to proceed. */ |
501 | if (OVS_UNLIKELY(size < sizeof(struct eth_header))) { | |
502 | goto out; | |
503 | } else { | |
504 | ovs_be16 vlan_tci; | |
50f06e16 | 505 | |
419681da | 506 | /* Link layer. */ |
268eca11 | 507 | ASSERT_SEQUENTIAL(dl_dst, dl_src); |
d70e8c28 | 508 | miniflow_push_macs(mf, dl_dst, data); |
419681da JR |
509 | /* dl_type, vlan_tci. */ |
510 | vlan_tci = parse_vlan(&data, &size); | |
511 | dl_type = parse_ethertype(&data, &size); | |
512 | miniflow_push_be16(mf, dl_type, dl_type); | |
513 | miniflow_push_be16(mf, vlan_tci, vlan_tci); | |
50f06e16 | 514 | } |
50f06e16 | 515 | |
419681da JR |
516 | /* Parse mpls. */ |
517 | if (OVS_UNLIKELY(eth_type_mpls(dl_type))) { | |
518 | int count; | |
519 | const void *mpls = data; | |
520 | ||
521 | packet->l2_5_ofs = (char *)data - l2; | |
522 | count = parse_mpls(&data, &size); | |
d70e8c28 | 523 | miniflow_push_words_32(mf, mpls_lse, mpls, count); |
b02475c5 SH |
524 | } |
525 | ||
ad128cc1 | 526 | /* Network layer. */ |
419681da JR |
527 | packet->l3_ofs = (char *)data - l2; |
528 | ||
529 | nw_frag = 0; | |
530 | if (OVS_LIKELY(dl_type == htons(ETH_TYPE_IP))) { | |
531 | const struct ip_header *nh = data; | |
532 | int ip_len; | |
fa8d9001 | 533 | uint16_t tot_len; |
419681da JR |
534 | |
535 | if (OVS_UNLIKELY(size < IP_HEADER_LEN)) { | |
536 | goto out; | |
537 | } | |
538 | ip_len = IP_IHL(nh->ip_ihl_ver) * 4; | |
539 | ||
540 | if (OVS_UNLIKELY(ip_len < IP_HEADER_LEN)) { | |
541 | goto out; | |
542 | } | |
fa8d9001 JR |
543 | if (OVS_UNLIKELY(size < ip_len)) { |
544 | goto out; | |
545 | } | |
546 | tot_len = ntohs(nh->ip_tot_len); | |
547 | if (OVS_UNLIKELY(tot_len > size)) { | |
548 | goto out; | |
549 | } | |
550 | if (OVS_UNLIKELY(size - tot_len > UINT8_MAX)) { | |
551 | goto out; | |
552 | } | |
cf62fa4c | 553 | dp_packet_set_l2_pad_size(packet, size - tot_len); |
fa8d9001 | 554 | size = tot_len; /* Never pull padding. */ |
419681da JR |
555 | |
556 | /* Push both source and destination address at once. */ | |
d70e8c28 JR |
557 | miniflow_push_words(mf, nw_src, &nh->ip_src, 1); |
558 | ||
559 | miniflow_push_be32(mf, ipv6_label, 0); /* Padding for IPv4. */ | |
419681da JR |
560 | |
561 | nw_tos = nh->ip_tos; | |
562 | nw_ttl = nh->ip_ttl; | |
563 | nw_proto = nh->ip_proto; | |
564 | if (OVS_UNLIKELY(IP_IS_FRAGMENT(nh->ip_frag_off))) { | |
565 | nw_frag = FLOW_NW_FRAG_ANY; | |
566 | if (nh->ip_frag_off & htons(IP_FRAG_OFF_MASK)) { | |
567 | nw_frag |= FLOW_NW_FRAG_LATER; | |
568 | } | |
569 | } | |
419681da | 570 | data_pull(&data, &size, ip_len); |
419681da JR |
571 | } else if (dl_type == htons(ETH_TYPE_IPV6)) { |
572 | const struct ovs_16aligned_ip6_hdr *nh; | |
573 | ovs_be32 tc_flow; | |
fa8d9001 | 574 | uint16_t plen; |
419681da JR |
575 | |
576 | if (OVS_UNLIKELY(size < sizeof *nh)) { | |
577 | goto out; | |
578 | } | |
579 | nh = data_pull(&data, &size, sizeof *nh); | |
580 | ||
fa8d9001 JR |
581 | plen = ntohs(nh->ip6_plen); |
582 | if (OVS_UNLIKELY(plen > size)) { | |
583 | goto out; | |
584 | } | |
585 | /* Jumbo Payload option not supported yet. */ | |
586 | if (OVS_UNLIKELY(size - plen > UINT8_MAX)) { | |
587 | goto out; | |
588 | } | |
cf62fa4c | 589 | dp_packet_set_l2_pad_size(packet, size - plen); |
fa8d9001 JR |
590 | size = plen; /* Never pull padding. */ |
591 | ||
419681da | 592 | miniflow_push_words(mf, ipv6_src, &nh->ip6_src, |
d70e8c28 | 593 | sizeof nh->ip6_src / 8); |
419681da | 594 | miniflow_push_words(mf, ipv6_dst, &nh->ip6_dst, |
d70e8c28 | 595 | sizeof nh->ip6_dst / 8); |
419681da JR |
596 | |
597 | tc_flow = get_16aligned_be32(&nh->ip6_flow); | |
598 | { | |
599 | ovs_be32 label = tc_flow & htonl(IPV6_LABEL_MASK); | |
d70e8c28 | 600 | miniflow_push_be32(mf, ipv6_label, label); |
419681da JR |
601 | } |
602 | ||
603 | nw_tos = ntohl(tc_flow) >> 20; | |
604 | nw_ttl = nh->ip6_hlim; | |
605 | nw_proto = nh->ip6_nxt; | |
606 | ||
607 | while (1) { | |
608 | if (OVS_LIKELY((nw_proto != IPPROTO_HOPOPTS) | |
609 | && (nw_proto != IPPROTO_ROUTING) | |
610 | && (nw_proto != IPPROTO_DSTOPTS) | |
611 | && (nw_proto != IPPROTO_AH) | |
612 | && (nw_proto != IPPROTO_FRAGMENT))) { | |
613 | /* It's either a terminal header (e.g., TCP, UDP) or one we | |
614 | * don't understand. In either case, we're done with the | |
615 | * packet, so use it to fill in 'nw_proto'. */ | |
616 | break; | |
617 | } | |
618 | ||
619 | /* We only verify that at least 8 bytes of the next header are | |
620 | * available, but many of these headers are longer. Ensure that | |
621 | * accesses within the extension header are within those first 8 | |
622 | * bytes. All extension headers are required to be at least 8 | |
623 | * bytes. */ | |
624 | if (OVS_UNLIKELY(size < 8)) { | |
625 | goto out; | |
7257b535 | 626 | } |
419681da JR |
627 | |
628 | if ((nw_proto == IPPROTO_HOPOPTS) | |
629 | || (nw_proto == IPPROTO_ROUTING) | |
630 | || (nw_proto == IPPROTO_DSTOPTS)) { | |
631 | /* These headers, while different, have the fields we care | |
632 | * about in the same location and with the same | |
633 | * interpretation. */ | |
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 + 1) * 8))) { | |
638 | goto out; | |
639 | } | |
640 | } else if (nw_proto == IPPROTO_AH) { | |
641 | /* A standard AH definition isn't available, but the fields | |
642 | * we care about are in the same location as the generic | |
643 | * option header--only the header length is calculated | |
644 | * differently. */ | |
645 | const struct ip6_ext *ext_hdr = data; | |
646 | nw_proto = ext_hdr->ip6e_nxt; | |
647 | if (OVS_UNLIKELY(!data_try_pull(&data, &size, | |
648 | (ext_hdr->ip6e_len + 2) * 4))) { | |
649 | goto out; | |
650 | } | |
651 | } else if (nw_proto == IPPROTO_FRAGMENT) { | |
652 | const struct ovs_16aligned_ip6_frag *frag_hdr = data; | |
653 | ||
654 | nw_proto = frag_hdr->ip6f_nxt; | |
655 | if (!data_try_pull(&data, &size, sizeof *frag_hdr)) { | |
656 | goto out; | |
657 | } | |
658 | ||
659 | /* We only process the first fragment. */ | |
660 | if (frag_hdr->ip6f_offlg != htons(0)) { | |
661 | nw_frag = FLOW_NW_FRAG_ANY; | |
662 | if ((frag_hdr->ip6f_offlg & IP6F_OFF_MASK) != htons(0)) { | |
663 | nw_frag |= FLOW_NW_FRAG_LATER; | |
664 | nw_proto = IPPROTO_FRAGMENT; | |
665 | break; | |
064af421 | 666 | } |
064af421 | 667 | } |
50f06e16 BP |
668 | } |
669 | } | |
419681da JR |
670 | } else { |
671 | if (dl_type == htons(ETH_TYPE_ARP) || | |
672 | dl_type == htons(ETH_TYPE_RARP)) { | |
74ff3298 | 673 | struct eth_addr arp_buf[2]; |
419681da JR |
674 | const struct arp_eth_header *arp = (const struct arp_eth_header *) |
675 | data_try_pull(&data, &size, ARP_ETH_HEADER_LEN); | |
676 | ||
677 | if (OVS_LIKELY(arp) && OVS_LIKELY(arp->ar_hrd == htons(1)) | |
678 | && OVS_LIKELY(arp->ar_pro == htons(ETH_TYPE_IP)) | |
679 | && OVS_LIKELY(arp->ar_hln == ETH_ADDR_LEN) | |
680 | && OVS_LIKELY(arp->ar_pln == 4)) { | |
d70e8c28 JR |
681 | miniflow_push_be32(mf, nw_src, |
682 | get_16aligned_be32(&arp->ar_spa)); | |
683 | miniflow_push_be32(mf, nw_dst, | |
684 | get_16aligned_be32(&arp->ar_tpa)); | |
419681da JR |
685 | |
686 | /* We only match on the lower 8 bits of the opcode. */ | |
687 | if (OVS_LIKELY(ntohs(arp->ar_op) <= 0xff)) { | |
d70e8c28 | 688 | miniflow_push_be32(mf, ipv6_label, 0); /* Pad with ARP. */ |
419681da JR |
689 | miniflow_push_be32(mf, nw_frag, htonl(ntohs(arp->ar_op))); |
690 | } | |
d31f1109 | 691 | |
419681da | 692 | /* Must be adjacent. */ |
268eca11 | 693 | ASSERT_SEQUENTIAL(arp_sha, arp_tha); |
419681da | 694 | |
74ff3298 JR |
695 | arp_buf[0] = arp->ar_sha; |
696 | arp_buf[1] = arp->ar_tha; | |
d70e8c28 | 697 | miniflow_push_macs(mf, arp_sha, arp_buf); |
06f41fc4 | 698 | miniflow_pad_to_64(mf, arp_tha); |
419681da | 699 | } |
d31f1109 | 700 | } |
419681da JR |
701 | goto out; |
702 | } | |
703 | ||
704 | packet->l4_ofs = (char *)data - l2; | |
705 | miniflow_push_be32(mf, nw_frag, | |
706 | BYTES_TO_BE32(nw_frag, nw_tos, nw_ttl, nw_proto)); | |
707 | ||
708 | if (OVS_LIKELY(!(nw_frag & FLOW_NW_FRAG_LATER))) { | |
709 | if (OVS_LIKELY(nw_proto == IPPROTO_TCP)) { | |
710 | if (OVS_LIKELY(size >= TCP_HEADER_LEN)) { | |
711 | const struct tcp_header *tcp = data; | |
712 | ||
74ff3298 | 713 | miniflow_push_be32(mf, arp_tha.ea[2], 0); |
419681da JR |
714 | miniflow_push_be32(mf, tcp_flags, |
715 | TCP_FLAGS_BE32(tcp->tcp_ctl)); | |
115f2481 JR |
716 | miniflow_push_be16(mf, tp_src, tcp->tcp_src); |
717 | miniflow_push_be16(mf, tp_dst, tcp->tcp_dst); | |
06f41fc4 | 718 | miniflow_pad_to_64(mf, tp_dst); |
419681da JR |
719 | } |
720 | } else if (OVS_LIKELY(nw_proto == IPPROTO_UDP)) { | |
721 | if (OVS_LIKELY(size >= UDP_HEADER_LEN)) { | |
722 | const struct udp_header *udp = data; | |
723 | ||
115f2481 JR |
724 | miniflow_push_be16(mf, tp_src, udp->udp_src); |
725 | miniflow_push_be16(mf, tp_dst, udp->udp_dst); | |
06f41fc4 | 726 | miniflow_pad_to_64(mf, tp_dst); |
064af421 | 727 | } |
419681da JR |
728 | } else if (OVS_LIKELY(nw_proto == IPPROTO_SCTP)) { |
729 | if (OVS_LIKELY(size >= SCTP_HEADER_LEN)) { | |
730 | const struct sctp_header *sctp = data; | |
a26ef517 | 731 | |
115f2481 JR |
732 | miniflow_push_be16(mf, tp_src, sctp->sctp_src); |
733 | miniflow_push_be16(mf, tp_dst, sctp->sctp_dst); | |
06f41fc4 | 734 | miniflow_pad_to_64(mf, tp_dst); |
419681da JR |
735 | } |
736 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMP)) { | |
737 | if (OVS_LIKELY(size >= ICMP_HEADER_LEN)) { | |
738 | const struct icmp_header *icmp = data; | |
739 | ||
740 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp_type)); | |
741 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp_code)); | |
06f41fc4 | 742 | miniflow_pad_to_64(mf, tp_dst); |
419681da | 743 | } |
0e612675 FL |
744 | } else if (OVS_LIKELY(nw_proto == IPPROTO_IGMP)) { |
745 | if (OVS_LIKELY(size >= IGMP_HEADER_LEN)) { | |
746 | const struct igmp_header *igmp = data; | |
747 | ||
748 | miniflow_push_be16(mf, tp_src, htons(igmp->igmp_type)); | |
749 | miniflow_push_be16(mf, tp_dst, htons(igmp->igmp_code)); | |
750 | miniflow_push_be32(mf, igmp_group_ip4, | |
751 | get_16aligned_be32(&igmp->group)); | |
752 | } | |
419681da JR |
753 | } else if (OVS_LIKELY(nw_proto == IPPROTO_ICMPV6)) { |
754 | if (OVS_LIKELY(size >= sizeof(struct icmp6_hdr))) { | |
755 | const struct in6_addr *nd_target = NULL; | |
aba5d6dd | 756 | struct eth_addr arp_buf[2] = { { { { 0 } } } }; |
419681da JR |
757 | const struct icmp6_hdr *icmp = data_pull(&data, &size, |
758 | sizeof *icmp); | |
cc5dba2f SH |
759 | parse_icmpv6(&data, &size, icmp, &nd_target, arp_buf); |
760 | if (nd_target) { | |
761 | miniflow_push_words(mf, nd_target, nd_target, | |
74ff3298 | 762 | sizeof *nd_target / sizeof(uint64_t)); |
419681da | 763 | } |
cc5dba2f | 764 | miniflow_push_macs(mf, arp_sha, arp_buf); |
06f41fc4 | 765 | miniflow_pad_to_64(mf, arp_tha); |
cc5dba2f SH |
766 | miniflow_push_be16(mf, tp_src, htons(icmp->icmp6_type)); |
767 | miniflow_push_be16(mf, tp_dst, htons(icmp->icmp6_code)); | |
06f41fc4 | 768 | miniflow_pad_to_64(mf, tp_dst); |
419681da | 769 | } |
064af421 BP |
770 | } |
771 | } | |
419681da | 772 | out: |
5fcff47b | 773 | dst->map = mf.map; |
064af421 BP |
774 | } |
775 | ||
993410fb BP |
776 | /* For every bit of a field that is wildcarded in 'wildcards', sets the |
777 | * corresponding bit in 'flow' to zero. */ | |
778 | void | |
779 | flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards) | |
780 | { | |
d70e8c28 JR |
781 | uint64_t *flow_u64 = (uint64_t *) flow; |
782 | const uint64_t *wc_u64 = (const uint64_t *) &wildcards->masks; | |
659c2346 | 783 | size_t i; |
993410fb | 784 | |
d70e8c28 JR |
785 | for (i = 0; i < FLOW_U64S; i++) { |
786 | flow_u64[i] &= wc_u64[i]; | |
26720e24 | 787 | } |
993410fb BP |
788 | } |
789 | ||
d8d9c698 EJ |
790 | void |
791 | flow_unwildcard_tp_ports(const struct flow *flow, struct flow_wildcards *wc) | |
792 | { | |
793 | if (flow->nw_proto != IPPROTO_ICMP) { | |
794 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
795 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
796 | } else { | |
797 | wc->masks.tp_src = htons(0xff); | |
798 | wc->masks.tp_dst = htons(0xff); | |
799 | } | |
800 | } | |
801 | ||
50dcbd8e | 802 | /* Initializes 'flow_metadata' with the metadata found in 'flow'. */ |
5d6c3af0 | 803 | void |
50dcbd8e | 804 | flow_get_metadata(const struct flow *flow, struct match *flow_metadata) |
5d6c3af0 | 805 | { |
50dcbd8e JG |
806 | int i; |
807 | ||
ffe4c74f | 808 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 35); |
e9358af6 | 809 | |
50dcbd8e JG |
810 | match_init_catchall(flow_metadata); |
811 | if (flow->tunnel.tun_id != htonll(0)) { | |
812 | match_set_tun_id(flow_metadata, flow->tunnel.tun_id); | |
813 | } | |
b666962b JG |
814 | if (flow->tunnel.flags & FLOW_TNL_PUB_F_MASK) { |
815 | match_set_tun_flags(flow_metadata, | |
816 | flow->tunnel.flags & FLOW_TNL_PUB_F_MASK); | |
817 | } | |
ffe4c74f | 818 | if (flow->tunnel.ip_src) { |
50dcbd8e JG |
819 | match_set_tun_src(flow_metadata, flow->tunnel.ip_src); |
820 | } | |
ffe4c74f | 821 | if (flow->tunnel.ip_dst) { |
50dcbd8e JG |
822 | match_set_tun_dst(flow_metadata, flow->tunnel.ip_dst); |
823 | } | |
ffe4c74f JB |
824 | if (ipv6_addr_is_set(&flow->tunnel.ipv6_src)) { |
825 | match_set_tun_ipv6_src(flow_metadata, &flow->tunnel.ipv6_src); | |
826 | } | |
827 | if (ipv6_addr_is_set(&flow->tunnel.ipv6_dst)) { | |
828 | match_set_tun_ipv6_dst(flow_metadata, &flow->tunnel.ipv6_dst); | |
829 | } | |
50dcbd8e JG |
830 | if (flow->tunnel.gbp_id != htons(0)) { |
831 | match_set_tun_gbp_id(flow_metadata, flow->tunnel.gbp_id); | |
832 | } | |
833 | if (flow->tunnel.gbp_flags) { | |
834 | match_set_tun_gbp_flags(flow_metadata, flow->tunnel.gbp_flags); | |
835 | } | |
6728d578 | 836 | tun_metadata_get_fmd(&flow->tunnel, flow_metadata); |
50dcbd8e JG |
837 | if (flow->metadata != htonll(0)) { |
838 | match_set_metadata(flow_metadata, flow->metadata); | |
839 | } | |
840 | ||
841 | for (i = 0; i < FLOW_N_REGS; i++) { | |
842 | if (flow->regs[i]) { | |
843 | match_set_reg(flow_metadata, i, flow->regs[i]); | |
844 | } | |
845 | } | |
846 | ||
847 | if (flow->pkt_mark != 0) { | |
848 | match_set_pkt_mark(flow_metadata, flow->pkt_mark); | |
849 | } | |
850 | ||
851 | match_set_in_port(flow_metadata, flow->in_port.ofp_port); | |
07659514 JS |
852 | if (flow->ct_state != 0) { |
853 | match_set_ct_state(flow_metadata, flow->ct_state); | |
854 | } | |
855 | if (flow->ct_zone != 0) { | |
856 | match_set_ct_zone(flow_metadata, flow->ct_zone); | |
857 | } | |
8e53fe8c JS |
858 | if (flow->ct_mark != 0) { |
859 | match_set_ct_mark(flow_metadata, flow->ct_mark); | |
860 | } | |
9daf2348 JS |
861 | if (!ovs_u128_is_zero(&flow->ct_label)) { |
862 | match_set_ct_label(flow_metadata, flow->ct_label); | |
863 | } | |
07659514 JS |
864 | } |
865 | ||
866 | const char *ct_state_to_string(uint32_t state) | |
867 | { | |
868 | switch (state) { | |
869 | case CS_REPLY_DIR: | |
870 | return "rpl"; | |
871 | case CS_TRACKED: | |
872 | return "trk"; | |
873 | case CS_NEW: | |
874 | return "new"; | |
875 | case CS_ESTABLISHED: | |
876 | return "est"; | |
877 | case CS_RELATED: | |
878 | return "rel"; | |
879 | case CS_INVALID: | |
880 | return "inv"; | |
9ac0aada JR |
881 | case CS_SRC_NAT: |
882 | return "snat"; | |
883 | case CS_DST_NAT: | |
884 | return "dnat"; | |
07659514 JS |
885 | default: |
886 | return NULL; | |
887 | } | |
5d6c3af0 EJ |
888 | } |
889 | ||
064af421 | 890 | char * |
ae412e7d | 891 | flow_to_string(const struct flow *flow) |
064af421 BP |
892 | { |
893 | struct ds ds = DS_EMPTY_INITIALIZER; | |
894 | flow_format(&ds, flow); | |
895 | return ds_cstr(&ds); | |
896 | } | |
897 | ||
4fe3445a PS |
898 | const char * |
899 | flow_tun_flag_to_string(uint32_t flags) | |
900 | { | |
901 | switch (flags) { | |
902 | case FLOW_TNL_F_DONT_FRAGMENT: | |
903 | return "df"; | |
904 | case FLOW_TNL_F_CSUM: | |
905 | return "csum"; | |
906 | case FLOW_TNL_F_KEY: | |
907 | return "key"; | |
94872594 JG |
908 | case FLOW_TNL_F_OAM: |
909 | return "oam"; | |
4fe3445a PS |
910 | default: |
911 | return NULL; | |
912 | } | |
913 | } | |
914 | ||
915 | void | |
916 | format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t), | |
917 | uint32_t flags, char del) | |
918 | { | |
919 | uint32_t bad = 0; | |
920 | ||
921 | if (!flags) { | |
8e4c1621 | 922 | ds_put_char(ds, '0'); |
4fe3445a PS |
923 | return; |
924 | } | |
925 | while (flags) { | |
926 | uint32_t bit = rightmost_1bit(flags); | |
927 | const char *s; | |
928 | ||
929 | s = bit_to_string(bit); | |
930 | if (s) { | |
931 | ds_put_format(ds, "%s%c", s, del); | |
932 | } else { | |
933 | bad |= bit; | |
934 | } | |
935 | ||
936 | flags &= ~bit; | |
937 | } | |
938 | ||
939 | if (bad) { | |
940 | ds_put_format(ds, "0x%"PRIx32"%c", bad, del); | |
941 | } | |
942 | ds_chomp(ds, del); | |
943 | } | |
944 | ||
61bf6666 JR |
945 | void |
946 | format_flags_masked(struct ds *ds, const char *name, | |
947 | const char *(*bit_to_string)(uint32_t), uint32_t flags, | |
8e4c1621 | 948 | uint32_t mask, uint32_t max_mask) |
61bf6666 JR |
949 | { |
950 | if (name) { | |
951 | ds_put_format(ds, "%s=", name); | |
952 | } | |
8e4c1621 JG |
953 | |
954 | if (mask == max_mask) { | |
955 | format_flags(ds, bit_to_string, flags, '|'); | |
956 | return; | |
957 | } | |
958 | ||
959 | if (!mask) { | |
960 | ds_put_cstr(ds, "0/0"); | |
961 | return; | |
962 | } | |
963 | ||
61bf6666 JR |
964 | while (mask) { |
965 | uint32_t bit = rightmost_1bit(mask); | |
966 | const char *s = bit_to_string(bit); | |
967 | ||
968 | ds_put_format(ds, "%s%s", (flags & bit) ? "+" : "-", | |
969 | s ? s : "[Unknown]"); | |
970 | mask &= ~bit; | |
971 | } | |
972 | } | |
973 | ||
8e4c1621 JG |
974 | /* Scans a string 's' of flags to determine their numerical value and |
975 | * returns the number of characters parsed using 'bit_to_string' to | |
976 | * lookup flag names. Scanning continues until the character 'end' is | |
977 | * reached. | |
978 | * | |
979 | * In the event of a failure, a negative error code will be returned. In | |
980 | * addition, if 'res_string' is non-NULL then a descriptive string will | |
981 | * be returned incorporating the identifying string 'field_name'. This | |
982 | * error string must be freed by the caller. | |
983 | * | |
984 | * Upon success, the flag values will be stored in 'res_flags' and | |
985 | * optionally 'res_mask', if it is non-NULL (if it is NULL then any masks | |
986 | * present in the original string will be considered an error). The | |
987 | * caller may restrict the acceptable set of values through the mask | |
988 | * 'allowed'. */ | |
989 | int | |
990 | parse_flags(const char *s, const char *(*bit_to_string)(uint32_t), | |
991 | char end, const char *field_name, char **res_string, | |
992 | uint32_t *res_flags, uint32_t allowed, uint32_t *res_mask) | |
993 | { | |
994 | uint32_t result = 0; | |
995 | int n; | |
996 | ||
997 | /* Parse masked flags in numeric format? */ | |
998 | if (res_mask && ovs_scan(s, "%"SCNi32"/%"SCNi32"%n", | |
999 | res_flags, res_mask, &n) && n > 0) { | |
1000 | if (*res_flags & ~allowed || *res_mask & ~allowed) { | |
1001 | goto unknown; | |
1002 | } | |
1003 | return n; | |
1004 | } | |
1005 | ||
1006 | n = 0; | |
1007 | ||
1008 | if (res_mask && (*s == '+' || *s == '-')) { | |
1009 | uint32_t flags = 0, mask = 0; | |
1010 | ||
1011 | /* Parse masked flags. */ | |
1012 | while (s[0] != end) { | |
1013 | bool set; | |
1014 | uint32_t bit; | |
1015 | size_t len; | |
1016 | ||
1017 | if (s[0] == '+') { | |
1018 | set = true; | |
1019 | } else if (s[0] == '-') { | |
1020 | set = false; | |
1021 | } else { | |
1022 | if (res_string) { | |
1023 | *res_string = xasprintf("%s: %s must be preceded by '+' " | |
1024 | "(for SET) or '-' (NOT SET)", s, | |
1025 | field_name); | |
1026 | } | |
1027 | return -EINVAL; | |
1028 | } | |
1029 | s++; | |
1030 | n++; | |
1031 | ||
1032 | for (bit = 1; bit; bit <<= 1) { | |
1033 | const char *fname = bit_to_string(bit); | |
1034 | ||
1035 | if (!fname) { | |
1036 | continue; | |
1037 | } | |
1038 | ||
1039 | len = strlen(fname); | |
1040 | if (strncmp(s, fname, len) || | |
1041 | (s[len] != '+' && s[len] != '-' && s[len] != end)) { | |
1042 | continue; | |
1043 | } | |
1044 | ||
1045 | if (mask & bit) { | |
1046 | /* bit already set. */ | |
1047 | if (res_string) { | |
1048 | *res_string = xasprintf("%s: Each %s flag can be " | |
1049 | "specified only once", s, | |
1050 | field_name); | |
1051 | } | |
1052 | return -EINVAL; | |
1053 | } | |
1054 | if (!(bit & allowed)) { | |
1055 | goto unknown; | |
1056 | } | |
1057 | if (set) { | |
1058 | flags |= bit; | |
1059 | } | |
1060 | mask |= bit; | |
1061 | break; | |
1062 | } | |
1063 | ||
1064 | if (!bit) { | |
1065 | goto unknown; | |
1066 | } | |
1067 | s += len; | |
1068 | n += len; | |
1069 | } | |
1070 | ||
1071 | *res_flags = flags; | |
1072 | *res_mask = mask; | |
1073 | return n; | |
1074 | } | |
1075 | ||
1076 | /* Parse unmasked flags. If a flag is present, it is set, otherwise | |
1077 | * it is not set. */ | |
1078 | while (s[n] != end) { | |
1079 | unsigned long long int flags; | |
1080 | uint32_t bit; | |
1081 | int n0; | |
1082 | ||
1083 | if (ovs_scan(&s[n], "%lli%n", &flags, &n0)) { | |
1084 | if (flags & ~allowed) { | |
1085 | goto unknown; | |
1086 | } | |
1087 | n += n0 + (s[n + n0] == '|'); | |
1088 | result |= flags; | |
1089 | continue; | |
1090 | } | |
1091 | ||
1092 | for (bit = 1; bit; bit <<= 1) { | |
1093 | const char *name = bit_to_string(bit); | |
1094 | size_t len; | |
1095 | ||
1096 | if (!name) { | |
1097 | continue; | |
1098 | } | |
1099 | ||
1100 | len = strlen(name); | |
1101 | if (!strncmp(s + n, name, len) && | |
1102 | (s[n + len] == '|' || s[n + len] == end)) { | |
1103 | if (!(bit & allowed)) { | |
1104 | goto unknown; | |
1105 | } | |
1106 | result |= bit; | |
1107 | n += len + (s[n + len] == '|'); | |
1108 | break; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | if (!bit) { | |
1113 | goto unknown; | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | *res_flags = result; | |
1118 | if (res_mask) { | |
1119 | *res_mask = UINT32_MAX; | |
1120 | } | |
1121 | if (res_string) { | |
1122 | *res_string = NULL; | |
1123 | } | |
1124 | return n; | |
1125 | ||
1126 | unknown: | |
1127 | if (res_string) { | |
1128 | *res_string = xasprintf("%s: unknown %s flag(s)", s, field_name); | |
1129 | } | |
1130 | return -EINVAL; | |
1131 | } | |
1132 | ||
064af421 | 1133 | void |
ae412e7d | 1134 | flow_format(struct ds *ds, const struct flow *flow) |
064af421 | 1135 | { |
aa6c9932 | 1136 | struct match match; |
78c9486d | 1137 | struct flow_wildcards *wc = &match.wc; |
296e07ac | 1138 | |
aa6c9932 | 1139 | match_wc_init(&match, flow); |
78c9486d JR |
1140 | |
1141 | /* As this function is most often used for formatting a packet in a | |
1142 | * packet-in message, skip formatting the packet context fields that are | |
e6d9ab56 JR |
1143 | * all-zeroes to make the print-out easier on the eyes. This means that a |
1144 | * missing context field implies a zero value for that field. This is | |
1145 | * similar to OpenFlow encoding of these fields, as the specification | |
1146 | * states that all-zeroes context fields should not be encoded in the | |
1147 | * packet-in messages. */ | |
1148 | if (!flow->in_port.ofp_port) { | |
1149 | WC_UNMASK_FIELD(wc, in_port); | |
1150 | } | |
78c9486d JR |
1151 | if (!flow->skb_priority) { |
1152 | WC_UNMASK_FIELD(wc, skb_priority); | |
1153 | } | |
1154 | if (!flow->pkt_mark) { | |
1155 | WC_UNMASK_FIELD(wc, pkt_mark); | |
1156 | } | |
1157 | if (!flow->recirc_id) { | |
1158 | WC_UNMASK_FIELD(wc, recirc_id); | |
1159 | } | |
330de069 JR |
1160 | if (!flow->dp_hash) { |
1161 | WC_UNMASK_FIELD(wc, dp_hash); | |
1162 | } | |
07659514 JS |
1163 | if (!flow->ct_state) { |
1164 | WC_UNMASK_FIELD(wc, ct_state); | |
1165 | } | |
1166 | if (!flow->ct_zone) { | |
1167 | WC_UNMASK_FIELD(wc, ct_zone); | |
1168 | } | |
8e53fe8c JS |
1169 | if (!flow->ct_mark) { |
1170 | WC_UNMASK_FIELD(wc, ct_mark); | |
1171 | } | |
9daf2348 JS |
1172 | if (ovs_u128_is_zero(&flow->ct_label)) { |
1173 | WC_UNMASK_FIELD(wc, ct_label); | |
1174 | } | |
78c9486d JR |
1175 | for (int i = 0; i < FLOW_N_REGS; i++) { |
1176 | if (!flow->regs[i]) { | |
1177 | WC_UNMASK_FIELD(wc, regs[i]); | |
1178 | } | |
1179 | } | |
1180 | if (!flow->metadata) { | |
1181 | WC_UNMASK_FIELD(wc, metadata); | |
1182 | } | |
1183 | ||
3f78c3cc | 1184 | match_format(&match, ds, OFP_DEFAULT_PRIORITY); |
064af421 BP |
1185 | } |
1186 | ||
1187 | void | |
ae412e7d | 1188 | flow_print(FILE *stream, const struct flow *flow) |
064af421 BP |
1189 | { |
1190 | char *s = flow_to_string(flow); | |
1191 | fputs(s, stream); | |
1192 | free(s); | |
1193 | } | |
54363004 BP |
1194 | \f |
1195 | /* flow_wildcards functions. */ | |
1196 | ||
d8ae4d67 | 1197 | /* Initializes 'wc' as a set of wildcards that matches every packet. */ |
54363004 | 1198 | void |
d8ae4d67 | 1199 | flow_wildcards_init_catchall(struct flow_wildcards *wc) |
54363004 | 1200 | { |
659c2346 | 1201 | memset(&wc->masks, 0, sizeof wc->masks); |
54363004 BP |
1202 | } |
1203 | ||
78c9486d JR |
1204 | /* Converts a flow into flow wildcards. It sets the wildcard masks based on |
1205 | * the packet headers extracted to 'flow'. It will not set the mask for fields | |
1206 | * that do not make sense for the packet type. OpenFlow-only metadata is | |
1207 | * wildcarded, but other metadata is unconditionally exact-matched. */ | |
1208 | void flow_wildcards_init_for_packet(struct flow_wildcards *wc, | |
1209 | const struct flow *flow) | |
1210 | { | |
1211 | memset(&wc->masks, 0x0, sizeof wc->masks); | |
1212 | ||
0de8783a | 1213 | /* Update this function whenever struct flow changes. */ |
ffe4c74f | 1214 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 35); |
0de8783a | 1215 | |
ffe4c74f | 1216 | if (flow_tnl_dst_is_set(&flow->tunnel)) { |
78c9486d JR |
1217 | if (flow->tunnel.flags & FLOW_TNL_F_KEY) { |
1218 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1219 | } | |
1220 | WC_MASK_FIELD(wc, tunnel.ip_src); | |
1221 | WC_MASK_FIELD(wc, tunnel.ip_dst); | |
ffe4c74f JB |
1222 | WC_MASK_FIELD(wc, tunnel.ipv6_src); |
1223 | WC_MASK_FIELD(wc, tunnel.ipv6_dst); | |
78c9486d JR |
1224 | WC_MASK_FIELD(wc, tunnel.flags); |
1225 | WC_MASK_FIELD(wc, tunnel.ip_tos); | |
1226 | WC_MASK_FIELD(wc, tunnel.ip_ttl); | |
1227 | WC_MASK_FIELD(wc, tunnel.tp_src); | |
1228 | WC_MASK_FIELD(wc, tunnel.tp_dst); | |
ac6073e3 MC |
1229 | WC_MASK_FIELD(wc, tunnel.gbp_id); |
1230 | WC_MASK_FIELD(wc, tunnel.gbp_flags); | |
9558d2a5 | 1231 | |
6728d578 JG |
1232 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1233 | if (flow->tunnel.metadata.present.map) { | |
1234 | wc->masks.tunnel.metadata.present.map = | |
1235 | flow->tunnel.metadata.present.map; | |
1236 | WC_MASK_FIELD(wc, tunnel.metadata.opts.u8); | |
1237 | } | |
1238 | } else { | |
1239 | WC_MASK_FIELD(wc, tunnel.metadata.present.len); | |
1240 | memset(wc->masks.tunnel.metadata.opts.gnv, 0xff, | |
1241 | flow->tunnel.metadata.present.len); | |
9558d2a5 | 1242 | } |
78c9486d JR |
1243 | } else if (flow->tunnel.tun_id) { |
1244 | WC_MASK_FIELD(wc, tunnel.tun_id); | |
1245 | } | |
1246 | ||
18080541 | 1247 | /* metadata, regs, and conj_id wildcarded. */ |
78c9486d JR |
1248 | |
1249 | WC_MASK_FIELD(wc, skb_priority); | |
1250 | WC_MASK_FIELD(wc, pkt_mark); | |
07659514 JS |
1251 | WC_MASK_FIELD(wc, ct_state); |
1252 | WC_MASK_FIELD(wc, ct_zone); | |
8e53fe8c | 1253 | WC_MASK_FIELD(wc, ct_mark); |
9daf2348 | 1254 | WC_MASK_FIELD(wc, ct_label); |
78c9486d JR |
1255 | WC_MASK_FIELD(wc, recirc_id); |
1256 | WC_MASK_FIELD(wc, dp_hash); | |
1257 | WC_MASK_FIELD(wc, in_port); | |
1258 | ||
c61f3870 BP |
1259 | /* actset_output wildcarded. */ |
1260 | ||
78c9486d JR |
1261 | WC_MASK_FIELD(wc, dl_dst); |
1262 | WC_MASK_FIELD(wc, dl_src); | |
1263 | WC_MASK_FIELD(wc, dl_type); | |
1264 | WC_MASK_FIELD(wc, vlan_tci); | |
1265 | ||
1266 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1267 | WC_MASK_FIELD(wc, nw_src); | |
1268 | WC_MASK_FIELD(wc, nw_dst); | |
1269 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1270 | WC_MASK_FIELD(wc, ipv6_src); | |
1271 | WC_MASK_FIELD(wc, ipv6_dst); | |
1272 | WC_MASK_FIELD(wc, ipv6_label); | |
1273 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || | |
1274 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
1275 | WC_MASK_FIELD(wc, nw_src); | |
1276 | WC_MASK_FIELD(wc, nw_dst); | |
1277 | WC_MASK_FIELD(wc, nw_proto); | |
1278 | WC_MASK_FIELD(wc, arp_sha); | |
1279 | WC_MASK_FIELD(wc, arp_tha); | |
1280 | return; | |
1281 | } else if (eth_type_mpls(flow->dl_type)) { | |
1282 | for (int i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { | |
1283 | WC_MASK_FIELD(wc, mpls_lse[i]); | |
1284 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
1285 | break; | |
1286 | } | |
1287 | } | |
1288 | return; | |
1289 | } else { | |
1290 | return; /* Unknown ethertype. */ | |
1291 | } | |
1292 | ||
1293 | /* IPv4 or IPv6. */ | |
1294 | WC_MASK_FIELD(wc, nw_frag); | |
1295 | WC_MASK_FIELD(wc, nw_tos); | |
1296 | WC_MASK_FIELD(wc, nw_ttl); | |
1297 | WC_MASK_FIELD(wc, nw_proto); | |
1298 | ||
1299 | /* No transport layer header in later fragments. */ | |
1300 | if (!(flow->nw_frag & FLOW_NW_FRAG_LATER) && | |
1301 | (flow->nw_proto == IPPROTO_ICMP || | |
1302 | flow->nw_proto == IPPROTO_ICMPV6 || | |
1303 | flow->nw_proto == IPPROTO_TCP || | |
1304 | flow->nw_proto == IPPROTO_UDP || | |
1305 | flow->nw_proto == IPPROTO_SCTP || | |
1306 | flow->nw_proto == IPPROTO_IGMP)) { | |
1307 | WC_MASK_FIELD(wc, tp_src); | |
1308 | WC_MASK_FIELD(wc, tp_dst); | |
1309 | ||
1310 | if (flow->nw_proto == IPPROTO_TCP) { | |
1311 | WC_MASK_FIELD(wc, tcp_flags); | |
1312 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { | |
1313 | WC_MASK_FIELD(wc, arp_sha); | |
1314 | WC_MASK_FIELD(wc, arp_tha); | |
1315 | WC_MASK_FIELD(wc, nd_target); | |
1316 | } else if (flow->nw_proto == IPPROTO_IGMP) { | |
1317 | WC_MASK_FIELD(wc, igmp_group_ip4); | |
1318 | } | |
1319 | } | |
1320 | } | |
1321 | ||
0de8783a JR |
1322 | /* Return a map of possible fields for a packet of the same type as 'flow'. |
1323 | * Including extra bits in the returned mask is not wrong, it is just less | |
1324 | * optimal. | |
1325 | * | |
1326 | * This is a less precise version of flow_wildcards_init_for_packet() above. */ | |
361d808d | 1327 | void |
5fcff47b | 1328 | flow_wc_map(const struct flow *flow, struct flowmap *map) |
0de8783a JR |
1329 | { |
1330 | /* Update this function whenever struct flow changes. */ | |
ffe4c74f | 1331 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 35); |
0de8783a | 1332 | |
5fcff47b JR |
1333 | flowmap_init(map); |
1334 | ||
ffe4c74f | 1335 | if (flow_tnl_dst_is_set(&flow->tunnel)) { |
5fcff47b | 1336 | FLOWMAP_SET__(map, tunnel, offsetof(struct flow_tnl, metadata)); |
6728d578 JG |
1337 | if (!(flow->tunnel.flags & FLOW_TNL_F_UDPIF)) { |
1338 | if (flow->tunnel.metadata.present.map) { | |
5fcff47b | 1339 | FLOWMAP_SET(map, tunnel.metadata); |
6728d578 JG |
1340 | } |
1341 | } else { | |
5fcff47b JR |
1342 | FLOWMAP_SET(map, tunnel.metadata.present.len); |
1343 | FLOWMAP_SET__(map, tunnel.metadata.opts.gnv, | |
1344 | flow->tunnel.metadata.present.len); | |
361d808d JR |
1345 | } |
1346 | } | |
0de8783a JR |
1347 | |
1348 | /* Metadata fields that can appear on packet input. */ | |
5fcff47b JR |
1349 | FLOWMAP_SET(map, skb_priority); |
1350 | FLOWMAP_SET(map, pkt_mark); | |
1351 | FLOWMAP_SET(map, recirc_id); | |
1352 | FLOWMAP_SET(map, dp_hash); | |
1353 | FLOWMAP_SET(map, in_port); | |
1354 | FLOWMAP_SET(map, dl_dst); | |
1355 | FLOWMAP_SET(map, dl_src); | |
1356 | FLOWMAP_SET(map, dl_type); | |
1357 | FLOWMAP_SET(map, vlan_tci); | |
07659514 JS |
1358 | FLOWMAP_SET(map, ct_state); |
1359 | FLOWMAP_SET(map, ct_zone); | |
8e53fe8c | 1360 | FLOWMAP_SET(map, ct_mark); |
9daf2348 | 1361 | FLOWMAP_SET(map, ct_label); |
0de8783a JR |
1362 | |
1363 | /* Ethertype-dependent fields. */ | |
1364 | if (OVS_LIKELY(flow->dl_type == htons(ETH_TYPE_IP))) { | |
5fcff47b JR |
1365 | FLOWMAP_SET(map, nw_src); |
1366 | FLOWMAP_SET(map, nw_dst); | |
1367 | FLOWMAP_SET(map, nw_proto); | |
1368 | FLOWMAP_SET(map, nw_frag); | |
1369 | FLOWMAP_SET(map, nw_tos); | |
1370 | FLOWMAP_SET(map, nw_ttl); | |
1371 | ||
0de8783a | 1372 | if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_IGMP)) { |
5fcff47b | 1373 | FLOWMAP_SET(map, igmp_group_ip4); |
0de8783a | 1374 | } else { |
5fcff47b JR |
1375 | FLOWMAP_SET(map, tcp_flags); |
1376 | FLOWMAP_SET(map, tp_src); | |
1377 | FLOWMAP_SET(map, tp_dst); | |
0de8783a JR |
1378 | } |
1379 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
5fcff47b JR |
1380 | FLOWMAP_SET(map, ipv6_src); |
1381 | FLOWMAP_SET(map, ipv6_dst); | |
1382 | FLOWMAP_SET(map, ipv6_label); | |
1383 | FLOWMAP_SET(map, nw_proto); | |
1384 | FLOWMAP_SET(map, nw_frag); | |
1385 | FLOWMAP_SET(map, nw_tos); | |
1386 | FLOWMAP_SET(map, nw_ttl); | |
1387 | ||
0de8783a | 1388 | if (OVS_UNLIKELY(flow->nw_proto == IPPROTO_ICMPV6)) { |
5fcff47b JR |
1389 | FLOWMAP_SET(map, nd_target); |
1390 | FLOWMAP_SET(map, arp_sha); | |
1391 | FLOWMAP_SET(map, arp_tha); | |
0de8783a | 1392 | } else { |
5fcff47b JR |
1393 | FLOWMAP_SET(map, tcp_flags); |
1394 | FLOWMAP_SET(map, tp_src); | |
1395 | FLOWMAP_SET(map, tp_dst); | |
0de8783a JR |
1396 | } |
1397 | } else if (eth_type_mpls(flow->dl_type)) { | |
5fcff47b | 1398 | FLOWMAP_SET(map, mpls_lse); |
0de8783a JR |
1399 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
1400 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
5fcff47b JR |
1401 | FLOWMAP_SET(map, nw_src); |
1402 | FLOWMAP_SET(map, nw_dst); | |
1403 | FLOWMAP_SET(map, nw_proto); | |
1404 | FLOWMAP_SET(map, arp_sha); | |
1405 | FLOWMAP_SET(map, arp_tha); | |
0de8783a | 1406 | } |
0de8783a JR |
1407 | } |
1408 | ||
c11c6faa AZ |
1409 | /* Clear the metadata and register wildcard masks. They are not packet |
1410 | * header fields. */ | |
1411 | void | |
1412 | flow_wildcards_clear_non_packet_fields(struct flow_wildcards *wc) | |
1413 | { | |
0de8783a | 1414 | /* Update this function whenever struct flow changes. */ |
ffe4c74f | 1415 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 35); |
0de8783a | 1416 | |
c11c6faa AZ |
1417 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
1418 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
c61f3870 | 1419 | wc->masks.actset_output = 0; |
18080541 | 1420 | wc->masks.conj_id = 0; |
c11c6faa AZ |
1421 | } |
1422 | ||
ecf1e7ac BP |
1423 | /* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or |
1424 | * fields. */ | |
1425 | bool | |
1426 | flow_wildcards_is_catchall(const struct flow_wildcards *wc) | |
1427 | { | |
d70e8c28 | 1428 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
659c2346 | 1429 | size_t i; |
ecf1e7ac | 1430 | |
d70e8c28 JR |
1431 | for (i = 0; i < FLOW_U64S; i++) { |
1432 | if (wc_u64[i]) { | |
ecf1e7ac BP |
1433 | return false; |
1434 | } | |
1435 | } | |
ecf1e7ac BP |
1436 | return true; |
1437 | } | |
1438 | ||
368eefac EJ |
1439 | /* Sets 'dst' as the bitwise AND of wildcards in 'src1' and 'src2'. |
1440 | * That is, a bit or a field is wildcarded in 'dst' if it is wildcarded | |
1441 | * in 'src1' or 'src2' or both. */ | |
b5d97350 | 1442 | void |
368eefac EJ |
1443 | flow_wildcards_and(struct flow_wildcards *dst, |
1444 | const struct flow_wildcards *src1, | |
1445 | const struct flow_wildcards *src2) | |
b5d97350 | 1446 | { |
d70e8c28 JR |
1447 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1448 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1449 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
659c2346 | 1450 | size_t i; |
a79c50f3 | 1451 | |
d70e8c28 JR |
1452 | for (i = 0; i < FLOW_U64S; i++) { |
1453 | dst_u64[i] = src1_u64[i] & src2_u64[i]; | |
26720e24 | 1454 | } |
b5d97350 BP |
1455 | } |
1456 | ||
368eefac EJ |
1457 | /* Sets 'dst' as the bitwise OR of wildcards in 'src1' and 'src2'. That |
1458 | * is, a bit or a field is wildcarded in 'dst' if it is neither | |
1459 | * wildcarded in 'src1' nor 'src2'. */ | |
1460 | void | |
1461 | flow_wildcards_or(struct flow_wildcards *dst, | |
1462 | const struct flow_wildcards *src1, | |
1463 | const struct flow_wildcards *src2) | |
1464 | { | |
d70e8c28 JR |
1465 | uint64_t *dst_u64 = (uint64_t *) &dst->masks; |
1466 | const uint64_t *src1_u64 = (const uint64_t *) &src1->masks; | |
1467 | const uint64_t *src2_u64 = (const uint64_t *) &src2->masks; | |
368eefac EJ |
1468 | size_t i; |
1469 | ||
d70e8c28 JR |
1470 | for (i = 0; i < FLOW_U64S; i++) { |
1471 | dst_u64[i] = src1_u64[i] | src2_u64[i]; | |
368eefac EJ |
1472 | } |
1473 | } | |
1474 | ||
b5d97350 BP |
1475 | /* Returns a hash of the wildcards in 'wc'. */ |
1476 | uint32_t | |
1006cda6 | 1477 | flow_wildcards_hash(const struct flow_wildcards *wc, uint32_t basis) |
b5d97350 | 1478 | { |
ac31c5af | 1479 | return flow_hash(&wc->masks, basis); |
b5d97350 BP |
1480 | } |
1481 | ||
1482 | /* Returns true if 'a' and 'b' represent the same wildcards, false if they are | |
1483 | * different. */ | |
1484 | bool | |
1485 | flow_wildcards_equal(const struct flow_wildcards *a, | |
1486 | const struct flow_wildcards *b) | |
1487 | { | |
659c2346 | 1488 | return flow_equal(&a->masks, &b->masks); |
b5d97350 BP |
1489 | } |
1490 | ||
1491 | /* Returns true if at least one bit or field is wildcarded in 'a' but not in | |
1492 | * 'b', false otherwise. */ | |
1493 | bool | |
1494 | flow_wildcards_has_extra(const struct flow_wildcards *a, | |
1495 | const struct flow_wildcards *b) | |
1496 | { | |
d70e8c28 JR |
1497 | const uint64_t *a_u64 = (const uint64_t *) &a->masks; |
1498 | const uint64_t *b_u64 = (const uint64_t *) &b->masks; | |
659c2346 | 1499 | size_t i; |
a79c50f3 | 1500 | |
d70e8c28 JR |
1501 | for (i = 0; i < FLOW_U64S; i++) { |
1502 | if ((a_u64[i] & b_u64[i]) != b_u64[i]) { | |
b6c9e612 BP |
1503 | return true; |
1504 | } | |
1505 | } | |
659c2346 BP |
1506 | return false; |
1507 | } | |
b6c9e612 | 1508 | |
659c2346 BP |
1509 | /* Returns true if 'a' and 'b' are equal, except that 0-bits (wildcarded bits) |
1510 | * in 'wc' do not need to be equal in 'a' and 'b'. */ | |
1511 | bool | |
1512 | flow_equal_except(const struct flow *a, const struct flow *b, | |
1513 | const struct flow_wildcards *wc) | |
1514 | { | |
d70e8c28 JR |
1515 | const uint64_t *a_u64 = (const uint64_t *) a; |
1516 | const uint64_t *b_u64 = (const uint64_t *) b; | |
1517 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; | |
659c2346 | 1518 | size_t i; |
d31f1109 | 1519 | |
d70e8c28 JR |
1520 | for (i = 0; i < FLOW_U64S; i++) { |
1521 | if ((a_u64[i] ^ b_u64[i]) & wc_u64[i]) { | |
659c2346 BP |
1522 | return false; |
1523 | } | |
47284b1f | 1524 | } |
659c2346 | 1525 | return true; |
b5d97350 BP |
1526 | } |
1527 | ||
b6c9e612 BP |
1528 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1529 | * (A 0-bit indicates a wildcard bit.) */ | |
1530 | void | |
1531 | flow_wildcards_set_reg_mask(struct flow_wildcards *wc, int idx, uint32_t mask) | |
1532 | { | |
26720e24 | 1533 | wc->masks.regs[idx] = mask; |
b6c9e612 | 1534 | } |
ff55ea1f | 1535 | |
79fe0f46 BP |
1536 | /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. |
1537 | * (A 0-bit indicates a wildcard bit.) */ | |
1538 | void | |
1539 | flow_wildcards_set_xreg_mask(struct flow_wildcards *wc, int idx, uint64_t mask) | |
1540 | { | |
1541 | flow_set_xreg(&wc->masks, idx, mask); | |
1542 | } | |
1543 | ||
28a560d9 JR |
1544 | /* Calculates the 5-tuple hash from the given miniflow. |
1545 | * This returns the same value as flow_hash_5tuple for the corresponding | |
1546 | * flow. */ | |
4f150744 JR |
1547 | uint32_t |
1548 | miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis) | |
1549 | { | |
28a560d9 | 1550 | uint32_t hash = basis; |
4f150744 | 1551 | |
28a560d9 JR |
1552 | if (flow) { |
1553 | ovs_be16 dl_type = MINIFLOW_GET_BE16(flow, dl_type); | |
1554 | ||
33c6a1b9 | 1555 | hash = hash_add(hash, MINIFLOW_GET_U8(flow, nw_proto)); |
28a560d9 JR |
1556 | |
1557 | /* Separate loops for better optimization. */ | |
1558 | if (dl_type == htons(ETH_TYPE_IPV6)) { | |
5fcff47b | 1559 | struct flowmap map = FLOWMAP_EMPTY_INITIALIZER; |
d70e8c28 | 1560 | uint64_t value; |
4f150744 | 1561 | |
5fcff47b JR |
1562 | FLOWMAP_SET(&map, ipv6_src); |
1563 | FLOWMAP_SET(&map, ipv6_dst); | |
1564 | ||
1565 | MINIFLOW_FOR_EACH_IN_FLOWMAP(value, flow, map) { | |
d70e8c28 | 1566 | hash = hash_add64(hash, value); |
28a560d9 JR |
1567 | } |
1568 | } else { | |
d70e8c28 JR |
1569 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_src)); |
1570 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, nw_dst)); | |
28a560d9 | 1571 | } |
d70e8c28 JR |
1572 | /* Add both ports at once. */ |
1573 | hash = hash_add(hash, MINIFLOW_GET_U32(flow, tp_src)); | |
33c6a1b9 | 1574 | hash = hash_finish(hash, 42); /* Arbitrary number. */ |
28a560d9 JR |
1575 | } |
1576 | return hash; | |
4f150744 JR |
1577 | } |
1578 | ||
268eca11 BP |
1579 | ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst); |
1580 | ASSERT_SEQUENTIAL(ipv6_src, ipv6_dst); | |
4f150744 | 1581 | |
63be20be AW |
1582 | /* Calculates the 5-tuple hash from the given flow. */ |
1583 | uint32_t | |
1584 | flow_hash_5tuple(const struct flow *flow, uint32_t basis) | |
1585 | { | |
28a560d9 | 1586 | uint32_t hash = basis; |
63be20be | 1587 | |
28a560d9 | 1588 | if (flow) { |
33c6a1b9 | 1589 | hash = hash_add(hash, flow->nw_proto); |
28a560d9 JR |
1590 | |
1591 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
d70e8c28 JR |
1592 | const uint64_t *flow_u64 = (const uint64_t *)flow; |
1593 | int ofs = offsetof(struct flow, ipv6_src) / 8; | |
1594 | int end = ofs + 2 * sizeof flow->ipv6_src / 8; | |
63be20be | 1595 | |
d70e8c28 JR |
1596 | for (;ofs < end; ofs++) { |
1597 | hash = hash_add64(hash, flow_u64[ofs]); | |
28a560d9 JR |
1598 | } |
1599 | } else { | |
33c6a1b9 JR |
1600 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_src); |
1601 | hash = hash_add(hash, (OVS_FORCE uint32_t) flow->nw_dst); | |
28a560d9 | 1602 | } |
d70e8c28 JR |
1603 | /* Add both ports at once. */ |
1604 | hash = hash_add(hash, | |
1605 | ((const uint32_t *)flow)[offsetof(struct flow, tp_src) | |
1606 | / sizeof(uint32_t)]); | |
33c6a1b9 | 1607 | hash = hash_finish(hash, 42); /* Arbitrary number. */ |
28a560d9 JR |
1608 | } |
1609 | return hash; | |
63be20be AW |
1610 | } |
1611 | ||
ff55ea1f EJ |
1612 | /* Hashes 'flow' based on its L2 through L4 protocol information. */ |
1613 | uint32_t | |
1614 | flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis) | |
1615 | { | |
1616 | struct { | |
d31f1109 JP |
1617 | union { |
1618 | ovs_be32 ipv4_addr; | |
1619 | struct in6_addr ipv6_addr; | |
1620 | }; | |
ff55ea1f EJ |
1621 | ovs_be16 eth_type; |
1622 | ovs_be16 vlan_tci; | |
5b909cbb | 1623 | ovs_be16 tp_port; |
74ff3298 | 1624 | struct eth_addr eth_addr; |
ff55ea1f EJ |
1625 | uint8_t ip_proto; |
1626 | } fields; | |
1627 | ||
1628 | int i; | |
1629 | ||
1630 | memset(&fields, 0, sizeof fields); | |
74ff3298 JR |
1631 | for (i = 0; i < ARRAY_SIZE(fields.eth_addr.be16); i++) { |
1632 | fields.eth_addr.be16[i] = flow->dl_src.be16[i] ^ flow->dl_dst.be16[i]; | |
ff55ea1f EJ |
1633 | } |
1634 | fields.vlan_tci = flow->vlan_tci & htons(VLAN_VID_MASK); | |
1635 | fields.eth_type = flow->dl_type; | |
3e3eda95 EJ |
1636 | |
1637 | /* UDP source and destination port are not taken into account because they | |
1638 | * will not necessarily be symmetric in a bidirectional flow. */ | |
ff55ea1f | 1639 | if (fields.eth_type == htons(ETH_TYPE_IP)) { |
d31f1109 JP |
1640 | fields.ipv4_addr = flow->nw_src ^ flow->nw_dst; |
1641 | fields.ip_proto = flow->nw_proto; | |
c6bcb685 | 1642 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 1643 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
d31f1109 JP |
1644 | } |
1645 | } else if (fields.eth_type == htons(ETH_TYPE_IPV6)) { | |
1646 | const uint8_t *a = &flow->ipv6_src.s6_addr[0]; | |
1647 | const uint8_t *b = &flow->ipv6_dst.s6_addr[0]; | |
1648 | uint8_t *ipv6_addr = &fields.ipv6_addr.s6_addr[0]; | |
1649 | ||
1650 | for (i=0; i<16; i++) { | |
1651 | ipv6_addr[i] = a[i] ^ b[i]; | |
1652 | } | |
ff55ea1f | 1653 | fields.ip_proto = flow->nw_proto; |
c6bcb685 | 1654 | if (fields.ip_proto == IPPROTO_TCP || fields.ip_proto == IPPROTO_SCTP) { |
5b909cbb | 1655 | fields.tp_port = flow->tp_src ^ flow->tp_dst; |
ff55ea1f | 1656 | } |
ff55ea1f | 1657 | } |
c49d1dd1 | 1658 | return jhash_bytes(&fields, sizeof fields, basis); |
ff55ea1f | 1659 | } |
520e9a2a | 1660 | |
4249b547 JB |
1661 | /* Hashes 'flow' based on its L3 through L4 protocol information */ |
1662 | uint32_t | |
1663 | flow_hash_symmetric_l3l4(const struct flow *flow, uint32_t basis, | |
1664 | bool inc_udp_ports) | |
1665 | { | |
1666 | uint32_t hash = basis; | |
1667 | ||
1668 | /* UDP source and destination port are also taken into account. */ | |
1669 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1670 | hash = hash_add(hash, | |
1671 | (OVS_FORCE uint32_t) (flow->nw_src ^ flow->nw_dst)); | |
1672 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1673 | /* IPv6 addresses are 64-bit aligned inside struct flow. */ | |
1674 | const uint64_t *a = ALIGNED_CAST(uint64_t *, flow->ipv6_src.s6_addr); | |
1675 | const uint64_t *b = ALIGNED_CAST(uint64_t *, flow->ipv6_dst.s6_addr); | |
1676 | ||
1677 | for (int i = 0; i < 4; i++) { | |
1678 | hash = hash_add64(hash, a[i] ^ b[i]); | |
1679 | } | |
1680 | } else { | |
1681 | /* Cannot hash non-IP flows */ | |
1682 | return 0; | |
1683 | } | |
1684 | ||
1685 | hash = hash_add(hash, flow->nw_proto); | |
1686 | if (flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP || | |
1687 | (inc_udp_ports && flow->nw_proto == IPPROTO_UDP)) { | |
1688 | hash = hash_add(hash, | |
1689 | (OVS_FORCE uint16_t) (flow->tp_src ^ flow->tp_dst)); | |
1690 | } | |
1691 | ||
1692 | return hash_finish(hash, basis); | |
1693 | } | |
1694 | ||
94639963 JR |
1695 | /* Initialize a flow with random fields that matter for nx_hash_fields. */ |
1696 | void | |
1697 | flow_random_hash_fields(struct flow *flow) | |
1698 | { | |
1699 | uint16_t rnd = random_uint16(); | |
1700 | ||
1701 | /* Initialize to all zeros. */ | |
1702 | memset(flow, 0, sizeof *flow); | |
1703 | ||
74ff3298 JR |
1704 | eth_addr_random(&flow->dl_src); |
1705 | eth_addr_random(&flow->dl_dst); | |
94639963 JR |
1706 | |
1707 | flow->vlan_tci = (OVS_FORCE ovs_be16) (random_uint16() & VLAN_VID_MASK); | |
1708 | ||
1709 | /* Make most of the random flows IPv4, some IPv6, and rest random. */ | |
1710 | flow->dl_type = rnd < 0x8000 ? htons(ETH_TYPE_IP) : | |
1711 | rnd < 0xc000 ? htons(ETH_TYPE_IPV6) : (OVS_FORCE ovs_be16)rnd; | |
1712 | ||
1713 | if (dl_type_is_ip_any(flow->dl_type)) { | |
1714 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1715 | flow->nw_src = (OVS_FORCE ovs_be32)random_uint32(); | |
1716 | flow->nw_dst = (OVS_FORCE ovs_be32)random_uint32(); | |
1717 | } else { | |
1718 | random_bytes(&flow->ipv6_src, sizeof flow->ipv6_src); | |
1719 | random_bytes(&flow->ipv6_dst, sizeof flow->ipv6_dst); | |
1720 | } | |
1721 | /* Make most of IP flows TCP, some UDP or SCTP, and rest random. */ | |
1722 | rnd = random_uint16(); | |
1723 | flow->nw_proto = rnd < 0x8000 ? IPPROTO_TCP : | |
1724 | rnd < 0xc000 ? IPPROTO_UDP : | |
1725 | rnd < 0xd000 ? IPPROTO_SCTP : (uint8_t)rnd; | |
1726 | if (flow->nw_proto == IPPROTO_TCP || | |
1727 | flow->nw_proto == IPPROTO_UDP || | |
1728 | flow->nw_proto == IPPROTO_SCTP) { | |
1729 | flow->tp_src = (OVS_FORCE ovs_be16)random_uint16(); | |
1730 | flow->tp_dst = (OVS_FORCE ovs_be16)random_uint16(); | |
1731 | } | |
1732 | } | |
1733 | } | |
1734 | ||
bcd2633a JP |
1735 | /* Masks the fields in 'wc' that are used by the flow hash 'fields'. */ |
1736 | void | |
6cdd5145 JP |
1737 | flow_mask_hash_fields(const struct flow *flow, struct flow_wildcards *wc, |
1738 | enum nx_hash_fields fields) | |
bcd2633a JP |
1739 | { |
1740 | switch (fields) { | |
1741 | case NX_HASH_FIELDS_ETH_SRC: | |
1742 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
1743 | break; | |
1744 | ||
1745 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
1746 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); | |
1747 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
6cdd5145 JP |
1748 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
1749 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
1750 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
7f8a65ca | 1751 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
6cdd5145 JP |
1752 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); |
1753 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
1754 | } | |
1755 | if (is_ip_any(flow)) { | |
1756 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
d8d9c698 | 1757 | flow_unwildcard_tp_ports(flow, wc); |
6cdd5145 | 1758 | } |
1dd35f8a | 1759 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
bcd2633a JP |
1760 | break; |
1761 | ||
4249b547 JB |
1762 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: |
1763 | if (is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP) { | |
1764 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
1765 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
1766 | } | |
1767 | /* no break */ | |
1768 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: | |
1769 | if (flow->dl_type == htons(ETH_TYPE_IP)) { | |
1770 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
1771 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
1772 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
1773 | memset(&wc->masks.ipv6_src, 0xff, sizeof wc->masks.ipv6_src); | |
1774 | memset(&wc->masks.ipv6_dst, 0xff, sizeof wc->masks.ipv6_dst); | |
1775 | } else { | |
1776 | break; /* non-IP flow */ | |
1777 | } | |
1778 | ||
1779 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
1780 | if (flow->nw_proto == IPPROTO_TCP || flow->nw_proto == IPPROTO_SCTP) { | |
1781 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
1782 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
1783 | } | |
1784 | break; | |
1785 | ||
bcd2633a | 1786 | default: |
428b2edd | 1787 | OVS_NOT_REACHED(); |
bcd2633a JP |
1788 | } |
1789 | } | |
1790 | ||
520e9a2a EJ |
1791 | /* Hashes the portions of 'flow' designated by 'fields'. */ |
1792 | uint32_t | |
1793 | flow_hash_fields(const struct flow *flow, enum nx_hash_fields fields, | |
1794 | uint16_t basis) | |
1795 | { | |
1796 | switch (fields) { | |
1797 | ||
1798 | case NX_HASH_FIELDS_ETH_SRC: | |
74ff3298 | 1799 | return jhash_bytes(&flow->dl_src, sizeof flow->dl_src, basis); |
520e9a2a EJ |
1800 | |
1801 | case NX_HASH_FIELDS_SYMMETRIC_L4: | |
1802 | return flow_hash_symmetric_l4(flow, basis); | |
4249b547 JB |
1803 | |
1804 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: | |
1805 | return flow_hash_symmetric_l3l4(flow, basis, false); | |
1806 | ||
1807 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: | |
1808 | return flow_hash_symmetric_l3l4(flow, basis, true); | |
1809 | ||
520e9a2a EJ |
1810 | } |
1811 | ||
428b2edd | 1812 | OVS_NOT_REACHED(); |
520e9a2a EJ |
1813 | } |
1814 | ||
1815 | /* Returns a string representation of 'fields'. */ | |
1816 | const char * | |
1817 | flow_hash_fields_to_str(enum nx_hash_fields fields) | |
1818 | { | |
1819 | switch (fields) { | |
1820 | case NX_HASH_FIELDS_ETH_SRC: return "eth_src"; | |
1821 | case NX_HASH_FIELDS_SYMMETRIC_L4: return "symmetric_l4"; | |
4249b547 JB |
1822 | case NX_HASH_FIELDS_SYMMETRIC_L3L4: return "symmetric_l3l4"; |
1823 | case NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP: return "symmetric_l3l4+udp"; | |
520e9a2a EJ |
1824 | default: return "<unknown>"; |
1825 | } | |
1826 | } | |
1827 | ||
1828 | /* Returns true if the value of 'fields' is supported. Otherwise false. */ | |
1829 | bool | |
1830 | flow_hash_fields_valid(enum nx_hash_fields fields) | |
1831 | { | |
1832 | return fields == NX_HASH_FIELDS_ETH_SRC | |
4249b547 JB |
1833 | || fields == NX_HASH_FIELDS_SYMMETRIC_L4 |
1834 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4 | |
1835 | || fields == NX_HASH_FIELDS_SYMMETRIC_L3L4_UDP; | |
520e9a2a | 1836 | } |
8b3b8dd1 | 1837 | |
368eefac EJ |
1838 | /* Returns a hash value for the bits of 'flow' that are active based on |
1839 | * 'wc', given 'basis'. */ | |
1840 | uint32_t | |
1841 | flow_hash_in_wildcards(const struct flow *flow, | |
1842 | const struct flow_wildcards *wc, uint32_t basis) | |
1843 | { | |
d70e8c28 JR |
1844 | const uint64_t *wc_u64 = (const uint64_t *) &wc->masks; |
1845 | const uint64_t *flow_u64 = (const uint64_t *) flow; | |
368eefac EJ |
1846 | uint32_t hash; |
1847 | size_t i; | |
1848 | ||
1849 | hash = basis; | |
d70e8c28 JR |
1850 | for (i = 0; i < FLOW_U64S; i++) { |
1851 | hash = hash_add64(hash, flow_u64[i] & wc_u64[i]); | |
368eefac | 1852 | } |
d70e8c28 | 1853 | return hash_finish(hash, 8 * FLOW_U64S); |
368eefac EJ |
1854 | } |
1855 | ||
3719455c BP |
1856 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
1857 | * OpenFlow 1.0 "dl_vlan" value: | |
1858 | * | |
1859 | * - If it is in the range 0...4095, 'flow->vlan_tci' is set to match | |
1860 | * that VLAN. Any existing PCP match is unchanged (it becomes 0 if | |
1861 | * 'flow' previously matched packets without a VLAN header). | |
1862 | * | |
1863 | * - If it is OFP_VLAN_NONE, 'flow->vlan_tci' is set to match a packet | |
1864 | * without a VLAN tag. | |
1865 | * | |
1866 | * - Other values of 'vid' should not be used. */ | |
1867 | void | |
fb0451d9 | 1868 | flow_set_dl_vlan(struct flow *flow, ovs_be16 vid) |
3719455c | 1869 | { |
0c436519 | 1870 | if (vid == htons(OFP10_VLAN_NONE)) { |
3719455c BP |
1871 | flow->vlan_tci = htons(0); |
1872 | } else { | |
1873 | vid &= htons(VLAN_VID_MASK); | |
1874 | flow->vlan_tci &= ~htons(VLAN_VID_MASK); | |
1875 | flow->vlan_tci |= htons(VLAN_CFI) | vid; | |
1876 | } | |
1877 | } | |
1878 | ||
cc34bc8c BP |
1879 | /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an |
1880 | * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID | |
1881 | * plus CFI). */ | |
1882 | void | |
1883 | flow_set_vlan_vid(struct flow *flow, ovs_be16 vid) | |
1884 | { | |
1885 | ovs_be16 mask = htons(VLAN_VID_MASK | VLAN_CFI); | |
1886 | flow->vlan_tci &= ~mask; | |
1887 | flow->vlan_tci |= vid & mask; | |
1888 | } | |
1889 | ||
3719455c BP |
1890 | /* Sets the VLAN PCP that 'flow' matches to 'pcp', which should be in the |
1891 | * range 0...7. | |
1892 | * | |
1893 | * This function has no effect on the VLAN ID that 'flow' matches. | |
1894 | * | |
1895 | * After calling this function, 'flow' will not match packets without a VLAN | |
1896 | * header. */ | |
1897 | void | |
1898 | flow_set_vlan_pcp(struct flow *flow, uint8_t pcp) | |
1899 | { | |
1900 | pcp &= 0x07; | |
1901 | flow->vlan_tci &= ~htons(VLAN_PCP_MASK); | |
1902 | flow->vlan_tci |= htons((pcp << VLAN_PCP_SHIFT) | VLAN_CFI); | |
1903 | } | |
1904 | ||
8bfd0fda BP |
1905 | /* Returns the number of MPLS LSEs present in 'flow' |
1906 | * | |
1907 | * Returns 0 if the 'dl_type' of 'flow' is not an MPLS ethernet type. | |
1908 | * Otherwise traverses 'flow''s MPLS label stack stopping at the | |
1909 | * first entry that has the BoS bit set. If no such entry exists then | |
1910 | * the maximum number of LSEs that can be stored in 'flow' is returned. | |
1911 | */ | |
1912 | int | |
1913 | flow_count_mpls_labels(const struct flow *flow, struct flow_wildcards *wc) | |
1914 | { | |
22d38fca | 1915 | /* dl_type is always masked. */ |
8bfd0fda BP |
1916 | if (eth_type_mpls(flow->dl_type)) { |
1917 | int i; | |
5af43325 | 1918 | int cnt; |
8bfd0fda | 1919 | |
5af43325 PS |
1920 | cnt = 0; |
1921 | for (i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { | |
8bfd0fda BP |
1922 | if (wc) { |
1923 | wc->masks.mpls_lse[i] |= htonl(MPLS_BOS_MASK); | |
1924 | } | |
1925 | if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { | |
1926 | return i + 1; | |
1927 | } | |
5af43325 PS |
1928 | if (flow->mpls_lse[i]) { |
1929 | cnt++; | |
1930 | } | |
8bfd0fda | 1931 | } |
5af43325 | 1932 | return cnt; |
8bfd0fda BP |
1933 | } else { |
1934 | return 0; | |
1935 | } | |
1936 | } | |
1937 | ||
1938 | /* Returns the number consecutive of MPLS LSEs, starting at the | |
1939 | * innermost LSE, that are common in 'a' and 'b'. | |
1940 | * | |
1941 | * 'an' must be flow_count_mpls_labels(a). | |
1942 | * 'bn' must be flow_count_mpls_labels(b). | |
1943 | */ | |
1944 | int | |
1945 | flow_count_common_mpls_labels(const struct flow *a, int an, | |
1946 | const struct flow *b, int bn, | |
1947 | struct flow_wildcards *wc) | |
1948 | { | |
1949 | int min_n = MIN(an, bn); | |
1950 | if (min_n == 0) { | |
1951 | return 0; | |
1952 | } else { | |
1953 | int common_n = 0; | |
1954 | int a_last = an - 1; | |
1955 | int b_last = bn - 1; | |
1956 | int i; | |
1957 | ||
1958 | for (i = 0; i < min_n; i++) { | |
1959 | if (wc) { | |
1960 | wc->masks.mpls_lse[a_last - i] = OVS_BE32_MAX; | |
1961 | wc->masks.mpls_lse[b_last - i] = OVS_BE32_MAX; | |
1962 | } | |
1963 | if (a->mpls_lse[a_last - i] != b->mpls_lse[b_last - i]) { | |
1964 | break; | |
1965 | } else { | |
1966 | common_n++; | |
1967 | } | |
1968 | } | |
1969 | ||
1970 | return common_n; | |
1971 | } | |
1972 | } | |
1973 | ||
1974 | /* Adds a new outermost MPLS label to 'flow' and changes 'flow''s Ethernet type | |
1975 | * to 'mpls_eth_type', which must be an MPLS Ethertype. | |
1976 | * | |
1977 | * If the new label is the first MPLS label in 'flow', it is generated as; | |
1978 | * | |
1979 | * - label: 2, if 'flow' is IPv6, otherwise 0. | |
1980 | * | |
1981 | * - TTL: IPv4 or IPv6 TTL, if present and nonzero, otherwise 64. | |
1982 | * | |
1983 | * - TC: IPv4 or IPv6 TOS, if present, otherwise 0. | |
1984 | * | |
1985 | * - BoS: 1. | |
1986 | * | |
22d38fca | 1987 | * If the new label is the second or later label MPLS label in 'flow', it is |
8bfd0fda BP |
1988 | * generated as; |
1989 | * | |
368fb7e6 | 1990 | * - label: Copied from outer label. |
8bfd0fda BP |
1991 | * |
1992 | * - TTL: Copied from outer label. | |
1993 | * | |
1994 | * - TC: Copied from outer label. | |
1995 | * | |
1996 | * - BoS: 0. | |
1997 | * | |
1998 | * 'n' must be flow_count_mpls_labels(flow). 'n' must be less than | |
1999 | * FLOW_MAX_MPLS_LABELS (because otherwise flow->mpls_lse[] would overflow). | |
2000 | */ | |
2001 | void | |
2002 | flow_push_mpls(struct flow *flow, int n, ovs_be16 mpls_eth_type, | |
2003 | struct flow_wildcards *wc) | |
2004 | { | |
2005 | ovs_assert(eth_type_mpls(mpls_eth_type)); | |
2006 | ovs_assert(n < FLOW_MAX_MPLS_LABELS); | |
2007 | ||
8bfd0fda BP |
2008 | if (n) { |
2009 | int i; | |
2010 | ||
22d38fca JR |
2011 | if (wc) { |
2012 | memset(&wc->masks.mpls_lse, 0xff, sizeof *wc->masks.mpls_lse * n); | |
2013 | } | |
8bfd0fda BP |
2014 | for (i = n; i >= 1; i--) { |
2015 | flow->mpls_lse[i] = flow->mpls_lse[i - 1]; | |
2016 | } | |
22d38fca | 2017 | flow->mpls_lse[0] = (flow->mpls_lse[1] & htonl(~MPLS_BOS_MASK)); |
8bfd0fda BP |
2018 | } else { |
2019 | int label = 0; /* IPv4 Explicit Null. */ | |
2020 | int tc = 0; | |
2021 | int ttl = 64; | |
2022 | ||
2023 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { | |
2024 | label = 2; | |
2025 | } | |
2026 | ||
2027 | if (is_ip_any(flow)) { | |
2028 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; | |
22d38fca JR |
2029 | if (wc) { |
2030 | wc->masks.nw_tos |= IP_DSCP_MASK; | |
2031 | wc->masks.nw_ttl = 0xff; | |
2032 | } | |
8bfd0fda BP |
2033 | |
2034 | if (flow->nw_ttl) { | |
2035 | ttl = flow->nw_ttl; | |
2036 | } | |
8bfd0fda BP |
2037 | } |
2038 | ||
2039 | flow->mpls_lse[0] = set_mpls_lse_values(ttl, tc, 1, htonl(label)); | |
2040 | ||
d70e8c28 | 2041 | /* Clear all L3 and L4 fields and dp_hash. */ |
ffe4c74f | 2042 | BUILD_ASSERT(FLOW_WC_SEQ == 35); |
8bfd0fda BP |
2043 | memset((char *) flow + FLOW_SEGMENT_2_ENDS_AT, 0, |
2044 | sizeof(struct flow) - FLOW_SEGMENT_2_ENDS_AT); | |
d70e8c28 | 2045 | flow->dp_hash = 0; |
8bfd0fda BP |
2046 | } |
2047 | flow->dl_type = mpls_eth_type; | |
2048 | } | |
2049 | ||
2050 | /* Tries to remove the outermost MPLS label from 'flow'. Returns true if | |
2051 | * successful, false otherwise. On success, sets 'flow''s Ethernet type to | |
2052 | * 'eth_type'. | |
2053 | * | |
2054 | * 'n' must be flow_count_mpls_labels(flow). */ | |
2055 | bool | |
2056 | flow_pop_mpls(struct flow *flow, int n, ovs_be16 eth_type, | |
2057 | struct flow_wildcards *wc) | |
2058 | { | |
2059 | int i; | |
2060 | ||
2061 | if (n == 0) { | |
2062 | /* Nothing to pop. */ | |
2063 | return false; | |
22d38fca JR |
2064 | } else if (n == FLOW_MAX_MPLS_LABELS) { |
2065 | if (wc) { | |
2066 | wc->masks.mpls_lse[n - 1] |= htonl(MPLS_BOS_MASK); | |
2067 | } | |
2068 | if (!(flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK))) { | |
2069 | /* Can't pop because don't know what to fill in mpls_lse[n - 1]. */ | |
2070 | return false; | |
2071 | } | |
8bfd0fda BP |
2072 | } |
2073 | ||
22d38fca JR |
2074 | if (wc) { |
2075 | memset(&wc->masks.mpls_lse[1], 0xff, | |
2076 | sizeof *wc->masks.mpls_lse * (n - 1)); | |
2077 | } | |
8bfd0fda BP |
2078 | for (i = 1; i < n; i++) { |
2079 | flow->mpls_lse[i - 1] = flow->mpls_lse[i]; | |
2080 | } | |
2081 | flow->mpls_lse[n - 1] = 0; | |
2082 | flow->dl_type = eth_type; | |
2083 | return true; | |
2084 | } | |
2085 | ||
b02475c5 SH |
2086 | /* Sets the MPLS Label that 'flow' matches to 'label', which is interpreted |
2087 | * as an OpenFlow 1.1 "mpls_label" value. */ | |
2088 | void | |
8bfd0fda | 2089 | flow_set_mpls_label(struct flow *flow, int idx, ovs_be32 label) |
b02475c5 | 2090 | { |
8bfd0fda | 2091 | set_mpls_lse_label(&flow->mpls_lse[idx], label); |
b02475c5 SH |
2092 | } |
2093 | ||
b676167a SH |
2094 | /* Sets the MPLS TTL that 'flow' matches to 'ttl', which should be in the |
2095 | * range 0...255. */ | |
2096 | void | |
8bfd0fda | 2097 | flow_set_mpls_ttl(struct flow *flow, int idx, uint8_t ttl) |
b676167a | 2098 | { |
8bfd0fda | 2099 | set_mpls_lse_ttl(&flow->mpls_lse[idx], ttl); |
b676167a SH |
2100 | } |
2101 | ||
b02475c5 SH |
2102 | /* Sets the MPLS TC that 'flow' matches to 'tc', which should be in the |
2103 | * range 0...7. */ | |
2104 | void | |
8bfd0fda | 2105 | flow_set_mpls_tc(struct flow *flow, int idx, uint8_t tc) |
b02475c5 | 2106 | { |
8bfd0fda | 2107 | set_mpls_lse_tc(&flow->mpls_lse[idx], tc); |
b02475c5 SH |
2108 | } |
2109 | ||
2110 | /* Sets the MPLS BOS bit that 'flow' matches to which should be 0 or 1. */ | |
2111 | void | |
8bfd0fda | 2112 | flow_set_mpls_bos(struct flow *flow, int idx, uint8_t bos) |
b02475c5 | 2113 | { |
8bfd0fda | 2114 | set_mpls_lse_bos(&flow->mpls_lse[idx], bos); |
b02475c5 SH |
2115 | } |
2116 | ||
8bfd0fda BP |
2117 | /* Sets the entire MPLS LSE. */ |
2118 | void | |
2119 | flow_set_mpls_lse(struct flow *flow, int idx, ovs_be32 lse) | |
2120 | { | |
2121 | flow->mpls_lse[idx] = lse; | |
2122 | } | |
52105b67 | 2123 | |
437d0d22 | 2124 | static size_t |
cf62fa4c | 2125 | flow_compose_l4(struct dp_packet *p, const struct flow *flow) |
52105b67 | 2126 | { |
437d0d22 JR |
2127 | size_t l4_len = 0; |
2128 | ||
52105b67 JR |
2129 | if (!(flow->nw_frag & FLOW_NW_FRAG_ANY) |
2130 | || !(flow->nw_frag & FLOW_NW_FRAG_LATER)) { | |
2131 | if (flow->nw_proto == IPPROTO_TCP) { | |
2132 | struct tcp_header *tcp; | |
2133 | ||
437d0d22 | 2134 | l4_len = sizeof *tcp; |
cf62fa4c | 2135 | tcp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2136 | tcp->tcp_src = flow->tp_src; |
2137 | tcp->tcp_dst = flow->tp_dst; | |
2138 | tcp->tcp_ctl = TCP_CTL(ntohs(flow->tcp_flags), 5); | |
52105b67 JR |
2139 | } else if (flow->nw_proto == IPPROTO_UDP) { |
2140 | struct udp_header *udp; | |
2141 | ||
437d0d22 | 2142 | l4_len = sizeof *udp; |
cf62fa4c | 2143 | udp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2144 | udp->udp_src = flow->tp_src; |
2145 | udp->udp_dst = flow->tp_dst; | |
52105b67 JR |
2146 | } else if (flow->nw_proto == IPPROTO_SCTP) { |
2147 | struct sctp_header *sctp; | |
2148 | ||
437d0d22 | 2149 | l4_len = sizeof *sctp; |
cf62fa4c | 2150 | sctp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2151 | sctp->sctp_src = flow->tp_src; |
2152 | sctp->sctp_dst = flow->tp_dst; | |
52105b67 JR |
2153 | } else if (flow->nw_proto == IPPROTO_ICMP) { |
2154 | struct icmp_header *icmp; | |
2155 | ||
437d0d22 | 2156 | l4_len = sizeof *icmp; |
cf62fa4c | 2157 | icmp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2158 | icmp->icmp_type = ntohs(flow->tp_src); |
2159 | icmp->icmp_code = ntohs(flow->tp_dst); | |
2160 | icmp->icmp_csum = csum(icmp, ICMP_HEADER_LEN); | |
0e612675 FL |
2161 | } else if (flow->nw_proto == IPPROTO_IGMP) { |
2162 | struct igmp_header *igmp; | |
2163 | ||
2164 | l4_len = sizeof *igmp; | |
cf62fa4c | 2165 | igmp = dp_packet_put_zeros(p, l4_len); |
0e612675 FL |
2166 | igmp->igmp_type = ntohs(flow->tp_src); |
2167 | igmp->igmp_code = ntohs(flow->tp_dst); | |
2168 | put_16aligned_be32(&igmp->group, flow->igmp_group_ip4); | |
2169 | igmp->igmp_csum = csum(igmp, IGMP_HEADER_LEN); | |
52105b67 JR |
2170 | } else if (flow->nw_proto == IPPROTO_ICMPV6) { |
2171 | struct icmp6_hdr *icmp; | |
2172 | ||
437d0d22 | 2173 | l4_len = sizeof *icmp; |
cf62fa4c | 2174 | icmp = dp_packet_put_zeros(p, l4_len); |
52105b67 JR |
2175 | icmp->icmp6_type = ntohs(flow->tp_src); |
2176 | icmp->icmp6_code = ntohs(flow->tp_dst); | |
2177 | ||
2178 | if (icmp->icmp6_code == 0 && | |
2179 | (icmp->icmp6_type == ND_NEIGHBOR_SOLICIT || | |
2180 | icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) { | |
2181 | struct in6_addr *nd_target; | |
74ff3298 | 2182 | struct ovs_nd_opt *nd_opt; |
52105b67 | 2183 | |
437d0d22 | 2184 | l4_len += sizeof *nd_target; |
cf62fa4c | 2185 | nd_target = dp_packet_put_zeros(p, sizeof *nd_target); |
52105b67 JR |
2186 | *nd_target = flow->nd_target; |
2187 | ||
2188 | if (!eth_addr_is_zero(flow->arp_sha)) { | |
437d0d22 | 2189 | l4_len += 8; |
cf62fa4c | 2190 | nd_opt = dp_packet_put_zeros(p, 8); |
52105b67 JR |
2191 | nd_opt->nd_opt_len = 1; |
2192 | nd_opt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; | |
74ff3298 | 2193 | nd_opt->nd_opt_mac = flow->arp_sha; |
52105b67 JR |
2194 | } |
2195 | if (!eth_addr_is_zero(flow->arp_tha)) { | |
437d0d22 | 2196 | l4_len += 8; |
cf62fa4c | 2197 | nd_opt = dp_packet_put_zeros(p, 8); |
52105b67 JR |
2198 | nd_opt->nd_opt_len = 1; |
2199 | nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR; | |
74ff3298 | 2200 | nd_opt->nd_opt_mac = flow->arp_tha; |
52105b67 JR |
2201 | } |
2202 | } | |
2203 | icmp->icmp6_cksum = (OVS_FORCE uint16_t) | |
cf62fa4c | 2204 | csum(icmp, (char *)dp_packet_tail(p) - (char *)icmp); |
52105b67 JR |
2205 | } |
2206 | } | |
437d0d22 | 2207 | return l4_len; |
52105b67 JR |
2208 | } |
2209 | ||
8b3b8dd1 BP |
2210 | /* Puts into 'b' a packet that flow_extract() would parse as having the given |
2211 | * 'flow'. | |
2212 | * | |
2213 | * (This is useful only for testing, obviously, and the packet isn't really | |
dc5a7ce7 | 2214 | * valid. It hasn't got some checksums filled in, for one, and lots of fields |
8b3b8dd1 BP |
2215 | * are just zeroed.) */ |
2216 | void | |
cf62fa4c | 2217 | flow_compose(struct dp_packet *p, const struct flow *flow) |
8b3b8dd1 | 2218 | { |
437d0d22 JR |
2219 | size_t l4_len; |
2220 | ||
52105b67 | 2221 | /* eth_compose() sets l3 pointer and makes sure it is 32-bit aligned. */ |
cf62fa4c | 2222 | eth_compose(p, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0); |
8b3b8dd1 | 2223 | if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) { |
cf62fa4c PS |
2224 | struct eth_header *eth = dp_packet_l2(p); |
2225 | eth->eth_type = htons(dp_packet_size(p)); | |
8b3b8dd1 BP |
2226 | return; |
2227 | } | |
2228 | ||
2229 | if (flow->vlan_tci & htons(VLAN_CFI)) { | |
cf62fa4c | 2230 | eth_push_vlan(p, htons(ETH_TYPE_VLAN), flow->vlan_tci); |
8b3b8dd1 BP |
2231 | } |
2232 | ||
cff78c88 | 2233 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
8b3b8dd1 BP |
2234 | struct ip_header *ip; |
2235 | ||
cf62fa4c | 2236 | ip = dp_packet_put_zeros(p, sizeof *ip); |
8b3b8dd1 | 2237 | ip->ip_ihl_ver = IP_IHL_VER(5, 4); |
eadef313 | 2238 | ip->ip_tos = flow->nw_tos; |
aabf5352 | 2239 | ip->ip_ttl = flow->nw_ttl; |
8b3b8dd1 | 2240 | ip->ip_proto = flow->nw_proto; |
7c457c33 BP |
2241 | put_16aligned_be32(&ip->ip_src, flow->nw_src); |
2242 | put_16aligned_be32(&ip->ip_dst, flow->nw_dst); | |
8b3b8dd1 | 2243 | |
eadef313 | 2244 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
7257b535 | 2245 | ip->ip_frag_off |= htons(IP_MORE_FRAGMENTS); |
eadef313 | 2246 | if (flow->nw_frag & FLOW_NW_FRAG_LATER) { |
7257b535 BP |
2247 | ip->ip_frag_off |= htons(100); |
2248 | } | |
2249 | } | |
df9b6612 | 2250 | |
cf62fa4c | 2251 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 2252 | |
cf62fa4c | 2253 | l4_len = flow_compose_l4(p, flow); |
52105b67 | 2254 | |
cf62fa4c PS |
2255 | ip = dp_packet_l3(p); |
2256 | ip->ip_tot_len = htons(p->l4_ofs - p->l3_ofs + l4_len); | |
dc5a7ce7 | 2257 | ip->ip_csum = csum(ip, sizeof *ip); |
cff78c88 | 2258 | } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
52105b67 JR |
2259 | struct ovs_16aligned_ip6_hdr *nh; |
2260 | ||
cf62fa4c | 2261 | nh = dp_packet_put_zeros(p, sizeof *nh); |
52105b67 JR |
2262 | put_16aligned_be32(&nh->ip6_flow, htonl(6 << 28) | |
2263 | htonl(flow->nw_tos << 20) | flow->ipv6_label); | |
2264 | nh->ip6_hlim = flow->nw_ttl; | |
2265 | nh->ip6_nxt = flow->nw_proto; | |
2266 | ||
2267 | memcpy(&nh->ip6_src, &flow->ipv6_src, sizeof(nh->ip6_src)); | |
2268 | memcpy(&nh->ip6_dst, &flow->ipv6_dst, sizeof(nh->ip6_dst)); | |
2269 | ||
cf62fa4c | 2270 | dp_packet_set_l4(p, dp_packet_tail(p)); |
52105b67 | 2271 | |
cf62fa4c | 2272 | l4_len = flow_compose_l4(p, flow); |
52105b67 | 2273 | |
cf62fa4c | 2274 | nh = dp_packet_l3(p); |
437d0d22 | 2275 | nh->ip6_plen = htons(l4_len); |
cff78c88 SH |
2276 | } else if (flow->dl_type == htons(ETH_TYPE_ARP) || |
2277 | flow->dl_type == htons(ETH_TYPE_RARP)) { | |
8b3b8dd1 BP |
2278 | struct arp_eth_header *arp; |
2279 | ||
cf62fa4c PS |
2280 | arp = dp_packet_put_zeros(p, sizeof *arp); |
2281 | dp_packet_set_l3(p, arp); | |
8b3b8dd1 BP |
2282 | arp->ar_hrd = htons(1); |
2283 | arp->ar_pro = htons(ETH_TYPE_IP); | |
2284 | arp->ar_hln = ETH_ADDR_LEN; | |
2285 | arp->ar_pln = 4; | |
2286 | arp->ar_op = htons(flow->nw_proto); | |
2287 | ||
2288 | if (flow->nw_proto == ARP_OP_REQUEST || | |
2289 | flow->nw_proto == ARP_OP_REPLY) { | |
7c457c33 BP |
2290 | put_16aligned_be32(&arp->ar_spa, flow->nw_src); |
2291 | put_16aligned_be32(&arp->ar_tpa, flow->nw_dst); | |
74ff3298 JR |
2292 | arp->ar_sha = flow->arp_sha; |
2293 | arp->ar_tha = flow->arp_tha; | |
8b3b8dd1 BP |
2294 | } |
2295 | } | |
b02475c5 SH |
2296 | |
2297 | if (eth_type_mpls(flow->dl_type)) { | |
8bfd0fda BP |
2298 | int n; |
2299 | ||
cf62fa4c | 2300 | p->l2_5_ofs = p->l3_ofs; |
8bfd0fda BP |
2301 | for (n = 1; n < FLOW_MAX_MPLS_LABELS; n++) { |
2302 | if (flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK)) { | |
2303 | break; | |
2304 | } | |
2305 | } | |
2306 | while (n > 0) { | |
cf62fa4c | 2307 | push_mpls(p, flow->dl_type, flow->mpls_lse[--n]); |
8bfd0fda | 2308 | } |
b02475c5 | 2309 | } |
8b3b8dd1 | 2310 | } |
5cb7a798 BP |
2311 | \f |
2312 | /* Compressed flow. */ | |
2313 | ||
df40c152 | 2314 | /* Completes an initialization of 'dst' as a miniflow copy of 'src' begun by |
5fcff47b JR |
2315 | * the caller. The caller must have already computed 'dst->map' properly to |
2316 | * indicate the significant uint64_t elements of 'src'. | |
13751fd8 JR |
2317 | * |
2318 | * Normally the significant elements are the ones that are non-zero. However, | |
2319 | * when a miniflow is initialized from a (mini)mask, the values can be zeroes, | |
ceb3bd67 JR |
2320 | * so that the flow and mask always have the same maps. */ |
2321 | void | |
2322 | miniflow_init(struct miniflow *dst, const struct flow *src) | |
df40c152 | 2323 | { |
09b0fa9c | 2324 | uint64_t *dst_u64 = miniflow_values(dst); |
361d808d | 2325 | size_t idx; |
df40c152 | 2326 | |
5fcff47b JR |
2327 | FLOWMAP_FOR_EACH_INDEX(idx, dst->map) { |
2328 | *dst_u64++ = flow_u64_value(src, idx); | |
df40c152 BP |
2329 | } |
2330 | } | |
2331 | ||
361d808d | 2332 | /* Initialize the maps of 'flow' from 'src'. */ |
ceb3bd67 JR |
2333 | void |
2334 | miniflow_map_init(struct miniflow *flow, const struct flow *src) | |
5cb7a798 | 2335 | { |
ceb3bd67 | 2336 | /* Initialize map, counting the number of nonzero elements. */ |
5fcff47b JR |
2337 | flowmap_init(&flow->map); |
2338 | for (size_t i = 0; i < FLOW_U64S; i++) { | |
2339 | if (flow_u64_value(src, i)) { | |
2340 | flowmap_set(&flow->map, i, 1); | |
5cb7a798 BP |
2341 | } |
2342 | } | |
ceb3bd67 | 2343 | } |
5cb7a798 | 2344 | |
ceb3bd67 JR |
2345 | /* Allocates 'n' count of miniflows, consecutive in memory, initializing the |
2346 | * map of each from 'src'. | |
2347 | * Returns the size of the miniflow data. */ | |
2348 | size_t | |
2349 | miniflow_alloc(struct miniflow *dsts[], size_t n, const struct miniflow *src) | |
2350 | { | |
361d808d JR |
2351 | size_t n_values = miniflow_n_values(src); |
2352 | size_t data_size = MINIFLOW_VALUES_SIZE(n_values); | |
2353 | struct miniflow *dst = xmalloc(n * (sizeof *src + data_size)); | |
5fcff47b | 2354 | size_t i; |
ceb3bd67 JR |
2355 | |
2356 | COVERAGE_INC(miniflow_malloc); | |
2357 | ||
2358 | for (i = 0; i < n; i++) { | |
361d808d | 2359 | *dst = *src; /* Copy maps. */ |
ceb3bd67 | 2360 | dsts[i] = dst; |
361d808d JR |
2361 | dst += 1; /* Just past the maps. */ |
2362 | dst = (struct miniflow *)((uint64_t *)dst + n_values); /* Skip data. */ | |
ceb3bd67 JR |
2363 | } |
2364 | return data_size; | |
df40c152 | 2365 | } |
5cb7a798 | 2366 | |
ceb3bd67 JR |
2367 | /* Returns a miniflow copy of 'src'. The caller must eventually free() the |
2368 | * returned miniflow. */ | |
8fd47924 | 2369 | struct miniflow * |
ceb3bd67 | 2370 | miniflow_create(const struct flow *src) |
df40c152 | 2371 | { |
ceb3bd67 JR |
2372 | struct miniflow tmp; |
2373 | struct miniflow *dst; | |
2374 | ||
2375 | miniflow_map_init(&tmp, src); | |
2376 | ||
2377 | miniflow_alloc(&dst, 1, &tmp); | |
2378 | miniflow_init(dst, src); | |
2379 | return dst; | |
5cb7a798 BP |
2380 | } |
2381 | ||
3016f3e4 | 2382 | /* Initializes 'dst' as a copy of 'src'. The caller must have allocated |
8fd47924 | 2383 | * 'dst' to have inline space for 'n_values' data in 'src'. */ |
3016f3e4 | 2384 | void |
a851eb94 JR |
2385 | miniflow_clone(struct miniflow *dst, const struct miniflow *src, |
2386 | size_t n_values) | |
3016f3e4 | 2387 | { |
361d808d | 2388 | *dst = *src; /* Copy maps. */ |
09b0fa9c JR |
2389 | memcpy(miniflow_values(dst), miniflow_get_values(src), |
2390 | MINIFLOW_VALUES_SIZE(n_values)); | |
5cb7a798 BP |
2391 | } |
2392 | ||
2393 | /* Initializes 'dst' as a copy of 'src'. */ | |
2394 | void | |
2395 | miniflow_expand(const struct miniflow *src, struct flow *dst) | |
2396 | { | |
ad77e3c5 EJ |
2397 | memset(dst, 0, sizeof *dst); |
2398 | flow_union_with_miniflow(dst, src); | |
5cb7a798 BP |
2399 | } |
2400 | ||
8fd47924 | 2401 | /* Returns true if 'a' and 'b' are equal miniflows, false otherwise. */ |
5cb7a798 BP |
2402 | bool |
2403 | miniflow_equal(const struct miniflow *a, const struct miniflow *b) | |
2404 | { | |
09b0fa9c JR |
2405 | const uint64_t *ap = miniflow_get_values(a); |
2406 | const uint64_t *bp = miniflow_get_values(b); | |
5cb7a798 | 2407 | |
5fcff47b JR |
2408 | /* This is mostly called after a matching hash, so it is highly likely that |
2409 | * the maps are equal as well. */ | |
2410 | if (OVS_LIKELY(flowmap_equal(a->map, b->map))) { | |
361d808d | 2411 | return !memcmp(ap, bp, miniflow_n_values(a) * sizeof *ap); |
080e28d0 | 2412 | } else { |
5fcff47b | 2413 | size_t idx; |
df40c152 | 2414 | |
5fcff47b JR |
2415 | FLOWMAP_FOR_EACH_INDEX (idx, flowmap_or(a->map, b->map)) { |
2416 | if ((flowmap_is_set(&a->map, idx) ? *ap++ : 0) | |
2417 | != (flowmap_is_set(&b->map, idx) ? *bp++ : 0)) { | |
080e28d0 | 2418 | return false; |
df40c152 | 2419 | } |
5cb7a798 BP |
2420 | } |
2421 | } | |
2422 | ||
df40c152 | 2423 | return true; |
5cb7a798 BP |
2424 | } |
2425 | ||
de4ad4a2 JR |
2426 | /* Returns false if 'a' and 'b' differ at the places where there are 1-bits |
2427 | * in 'mask', true otherwise. */ | |
5cb7a798 BP |
2428 | bool |
2429 | miniflow_equal_in_minimask(const struct miniflow *a, const struct miniflow *b, | |
2430 | const struct minimask *mask) | |
2431 | { | |
09b0fa9c | 2432 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 2433 | size_t idx; |
5cb7a798 | 2434 | |
5fcff47b | 2435 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
1cea007c | 2436 | if ((miniflow_get(a, idx) ^ miniflow_get(b, idx)) & *p++) { |
080e28d0 | 2437 | return false; |
5cb7a798 BP |
2438 | } |
2439 | } | |
2440 | ||
2441 | return true; | |
2442 | } | |
2443 | ||
2444 | /* Returns true if 'a' and 'b' are equal at the places where there are 1-bits | |
2445 | * in 'mask', false if they differ. */ | |
2446 | bool | |
2447 | miniflow_equal_flow_in_minimask(const struct miniflow *a, const struct flow *b, | |
2448 | const struct minimask *mask) | |
2449 | { | |
09b0fa9c | 2450 | const uint64_t *p = miniflow_get_values(&mask->masks); |
361d808d | 2451 | size_t idx; |
5cb7a798 | 2452 | |
5fcff47b JR |
2453 | FLOWMAP_FOR_EACH_INDEX(idx, mask->masks.map) { |
2454 | if ((miniflow_get(a, idx) ^ flow_u64_value(b, idx)) & *p++) { | |
080e28d0 | 2455 | return false; |
5cb7a798 BP |
2456 | } |
2457 | } | |
2458 | ||
2459 | return true; | |
2460 | } | |
2461 | ||
5cb7a798 | 2462 | \f |
ceb3bd67 JR |
2463 | void |
2464 | minimask_init(struct minimask *mask, const struct flow_wildcards *wc) | |
2465 | { | |
2466 | miniflow_init(&mask->masks, &wc->masks); | |
2467 | } | |
2468 | ||
8fd47924 JR |
2469 | /* Returns a minimask copy of 'wc'. The caller must eventually free the |
2470 | * returned minimask with free(). */ | |
2471 | struct minimask * | |
2472 | minimask_create(const struct flow_wildcards *wc) | |
5cb7a798 | 2473 | { |
8fd47924 | 2474 | return (struct minimask *)miniflow_create(&wc->masks); |
5cb7a798 BP |
2475 | } |
2476 | ||
2477 | /* Initializes 'dst_' as the bit-wise "and" of 'a_' and 'b_'. | |
2478 | * | |
8fd47924 JR |
2479 | * The caller must provide room for FLOW_U64S "uint64_t"s in 'storage', which |
2480 | * must follow '*dst_' in memory, for use by 'dst_'. The caller must *not* | |
2481 | * free 'dst_' free(). */ | |
5cb7a798 BP |
2482 | void |
2483 | minimask_combine(struct minimask *dst_, | |
2484 | const struct minimask *a_, const struct minimask *b_, | |
d70e8c28 | 2485 | uint64_t storage[FLOW_U64S]) |
5cb7a798 BP |
2486 | { |
2487 | struct miniflow *dst = &dst_->masks; | |
d70e8c28 | 2488 | uint64_t *dst_values = storage; |
5cb7a798 BP |
2489 | const struct miniflow *a = &a_->masks; |
2490 | const struct miniflow *b = &b_->masks; | |
361d808d | 2491 | size_t idx; |
5cb7a798 | 2492 | |
5fcff47b | 2493 | flowmap_init(&dst->map); |
080e28d0 | 2494 | |
5fcff47b | 2495 | FLOWMAP_FOR_EACH_INDEX(idx, flowmap_and(a->map, b->map)) { |
361d808d | 2496 | /* Both 'a' and 'b' have non-zero data at 'idx'. */ |
5fcff47b | 2497 | uint64_t mask = *miniflow_get__(a, idx) & *miniflow_get__(b, idx); |
361d808d JR |
2498 | |
2499 | if (mask) { | |
5fcff47b | 2500 | flowmap_set(&dst->map, idx, 1); |
1cea007c | 2501 | *dst_values++ = mask; |
5cb7a798 BP |
2502 | } |
2503 | } | |
2504 | } | |
2505 | ||
8fd47924 | 2506 | /* Initializes 'wc' as a copy of 'mask'. */ |
5cb7a798 BP |
2507 | void |
2508 | minimask_expand(const struct minimask *mask, struct flow_wildcards *wc) | |
2509 | { | |
2510 | miniflow_expand(&mask->masks, &wc->masks); | |
2511 | } | |
2512 | ||
f4d335e9 JR |
2513 | /* Returns true if 'a' and 'b' are the same flow mask, false otherwise. |
2514 | * Minimasks may not have zero data values, so for the minimasks to be the | |
2515 | * same, they need to have the same map and the same data values. */ | |
5cb7a798 BP |
2516 | bool |
2517 | minimask_equal(const struct minimask *a, const struct minimask *b) | |
2518 | { | |
5fcff47b JR |
2519 | return !memcmp(a, b, sizeof *a |
2520 | + MINIFLOW_VALUES_SIZE(miniflow_n_values(&a->masks))); | |
5cb7a798 BP |
2521 | } |
2522 | ||
d4570fd8 | 2523 | /* Returns true if at least one bit matched by 'b' is wildcarded by 'a', |
5cb7a798 BP |
2524 | * false otherwise. */ |
2525 | bool | |
d4570fd8 | 2526 | minimask_has_extra(const struct minimask *a, const struct minimask *b) |
5cb7a798 | 2527 | { |
09b0fa9c | 2528 | const uint64_t *bp = miniflow_get_values(&b->masks); |
361d808d | 2529 | size_t idx; |
5cb7a798 | 2530 | |
5fcff47b | 2531 | FLOWMAP_FOR_EACH_INDEX(idx, b->masks.map) { |
d70e8c28 | 2532 | uint64_t b_u64 = *bp++; |
5cb7a798 | 2533 | |
d70e8c28 JR |
2534 | /* 'b_u64' is non-zero, check if the data in 'a' is either zero |
2535 | * or misses some of the bits in 'b_u64'. */ | |
5fcff47b JR |
2536 | if (!MINIFLOW_IN_MAP(&a->masks, idx) |
2537 | || ((*miniflow_get__(&a->masks, idx) & b_u64) != b_u64)) { | |
f4d335e9 | 2538 | return true; /* 'a' wildcards some bits 'b' doesn't. */ |
5cb7a798 BP |
2539 | } |
2540 | } | |
2541 | ||
2542 | return false; | |
2543 | } |