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fa37b408 | 1 | /* |
dc4762ed | 2 | * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks. |
fa37b408 BP |
3 | * |
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: | |
7 | * | |
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. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | #include "ofp-print.h" | |
dc4762ed | 19 | #include <errno.h> |
fa37b408 | 20 | #include <inttypes.h> |
6ca00f6f ETN |
21 | #include <sys/types.h> |
22 | #include <netinet/in.h> | |
b459a924 | 23 | #include <netinet/icmp6.h> |
fa37b408 | 24 | #include <stdlib.h> |
3b6a2571 | 25 | #include "autopath.h" |
daff3353 | 26 | #include "bundle.h" |
10a24935 | 27 | #include "byte-order.h" |
d8ae4d67 | 28 | #include "classifier.h" |
dc4762ed | 29 | #include "dynamic-string.h" |
75a75043 | 30 | #include "learn.h" |
53ddd40a | 31 | #include "multipath.h" |
b6c9e612 | 32 | #include "nx-match.h" |
dc4762ed | 33 | #include "ofp-errors.h" |
fa37b408 BP |
34 | #include "ofp-util.h" |
35 | #include "ofpbuf.h" | |
36 | #include "packets.h" | |
37 | #include "random.h" | |
4ffd1b43 | 38 | #include "unaligned.h" |
e41a9130 | 39 | #include "type-props.h" |
5136ce49 | 40 | #include "vlog.h" |
fa37b408 | 41 | |
d98e6007 | 42 | VLOG_DEFINE_THIS_MODULE(ofp_util); |
fa37b408 BP |
43 | |
44 | /* Rate limit for OpenFlow message parse errors. These always indicate a bug | |
45 | * in the peer and so there's not much point in showing a lot of them. */ | |
46 | static struct vlog_rate_limit bad_ofmsg_rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
47 | ||
0596e897 BP |
48 | /* Given the wildcard bit count in the least-significant 6 of 'wcbits', returns |
49 | * an IP netmask with a 1 in each bit that must match and a 0 in each bit that | |
50 | * is wildcarded. | |
51 | * | |
52 | * The bits in 'wcbits' are in the format used in enum ofp_flow_wildcards: 0 | |
53 | * is exact match, 1 ignores the LSB, 2 ignores the 2 least-significant bits, | |
54 | * ..., 32 and higher wildcard the entire field. This is the *opposite* of the | |
55 | * usual convention where e.g. /24 indicates that 8 bits (not 24 bits) are | |
56 | * wildcarded. */ | |
57 | ovs_be32 | |
58 | ofputil_wcbits_to_netmask(int wcbits) | |
59 | { | |
60 | wcbits &= 0x3f; | |
61 | return wcbits < 32 ? htonl(~((1u << wcbits) - 1)) : 0; | |
62 | } | |
63 | ||
64 | /* Given the IP netmask 'netmask', returns the number of bits of the IP address | |
aad29cd1 BP |
65 | * that it wildcards, that is, the number of 0-bits in 'netmask'. 'netmask' |
66 | * must be a CIDR netmask (see ip_is_cidr()). */ | |
0596e897 BP |
67 | int |
68 | ofputil_netmask_to_wcbits(ovs_be32 netmask) | |
69 | { | |
aad29cd1 | 70 | return 32 - ip_count_cidr_bits(netmask); |
0596e897 BP |
71 | } |
72 | ||
d8ae4d67 BP |
73 | /* A list of the FWW_* and OFPFW_ bits that have the same value, meaning, and |
74 | * name. */ | |
75 | #define WC_INVARIANT_LIST \ | |
76 | WC_INVARIANT_BIT(IN_PORT) \ | |
d8ae4d67 BP |
77 | WC_INVARIANT_BIT(DL_SRC) \ |
78 | WC_INVARIANT_BIT(DL_DST) \ | |
79 | WC_INVARIANT_BIT(DL_TYPE) \ | |
80 | WC_INVARIANT_BIT(NW_PROTO) \ | |
81 | WC_INVARIANT_BIT(TP_SRC) \ | |
82 | WC_INVARIANT_BIT(TP_DST) | |
83 | ||
84 | /* Verify that all of the invariant bits (as defined on WC_INVARIANT_LIST) | |
85 | * actually have the same names and values. */ | |
86 | #define WC_INVARIANT_BIT(NAME) BUILD_ASSERT_DECL(FWW_##NAME == OFPFW_##NAME); | |
87 | WC_INVARIANT_LIST | |
88 | #undef WC_INVARIANT_BIT | |
89 | ||
90 | /* WC_INVARIANTS is the invariant bits (as defined on WC_INVARIANT_LIST) all | |
91 | * OR'd together. */ | |
eeba8e4f | 92 | static const flow_wildcards_t WC_INVARIANTS = 0 |
d8ae4d67 BP |
93 | #define WC_INVARIANT_BIT(NAME) | FWW_##NAME |
94 | WC_INVARIANT_LIST | |
95 | #undef WC_INVARIANT_BIT | |
eeba8e4f | 96 | ; |
d8ae4d67 | 97 | |
eb6f28db BP |
98 | /* Converts the wildcard in 'ofpfw' into a flow_wildcards in 'wc' for use in |
99 | * struct cls_rule. It is the caller's responsibility to handle the special | |
100 | * case where the flow match's dl_vlan is set to OFP_VLAN_NONE. */ | |
7286b1e1 | 101 | void |
eb6f28db | 102 | ofputil_wildcard_from_openflow(uint32_t ofpfw, struct flow_wildcards *wc) |
d8ae4d67 | 103 | { |
7257b535 | 104 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 3); |
a877206f | 105 | |
d8ae4d67 | 106 | /* Initialize most of rule->wc. */ |
f9ba8dad | 107 | flow_wildcards_init_catchall(wc); |
eeba8e4f | 108 | wc->wildcards = (OVS_FORCE flow_wildcards_t) ofpfw & WC_INVARIANTS; |
bad68a99 JP |
109 | |
110 | /* Wildcard fields that aren't defined by ofp_match or tun_id. */ | |
685a51a5 | 111 | wc->wildcards |= (FWW_ARP_SHA | FWW_ARP_THA | FWW_ND_TARGET); |
bad68a99 | 112 | |
7257b535 BP |
113 | if (!(ofpfw & OFPFW_NW_TOS)) { |
114 | wc->tos_frag_mask |= IP_DSCP_MASK; | |
d8ae4d67 | 115 | } |
7257b535 | 116 | |
d8ae4d67 BP |
117 | wc->nw_src_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_SRC_SHIFT); |
118 | wc->nw_dst_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_DST_SHIFT); | |
119 | ||
d8ae4d67 BP |
120 | if (ofpfw & OFPFW_DL_DST) { |
121 | /* OpenFlow 1.0 OFPFW_DL_DST covers the whole Ethernet destination, but | |
122 | * Open vSwitch breaks the Ethernet destination into bits as FWW_DL_DST | |
123 | * and FWW_ETH_MCAST. */ | |
124 | wc->wildcards |= FWW_ETH_MCAST; | |
125 | } | |
126 | ||
eb6f28db BP |
127 | /* VLAN TCI mask. */ |
128 | if (!(ofpfw & OFPFW_DL_VLAN_PCP)) { | |
129 | wc->vlan_tci_mask |= htons(VLAN_PCP_MASK | VLAN_CFI); | |
130 | } | |
131 | if (!(ofpfw & OFPFW_DL_VLAN)) { | |
132 | wc->vlan_tci_mask |= htons(VLAN_VID_MASK | VLAN_CFI); | |
133 | } | |
134 | } | |
135 | ||
136 | /* Converts the ofp_match in 'match' into a cls_rule in 'rule', with the given | |
137 | * 'priority'. */ | |
138 | void | |
139 | ofputil_cls_rule_from_match(const struct ofp_match *match, | |
140 | unsigned int priority, struct cls_rule *rule) | |
141 | { | |
142 | uint32_t ofpfw = ntohl(match->wildcards) & OFPFW_ALL; | |
143 | ||
144 | /* Initialize rule->priority, rule->wc. */ | |
145 | rule->priority = !ofpfw ? UINT16_MAX : priority; | |
146 | ofputil_wildcard_from_openflow(ofpfw, &rule->wc); | |
147 | ||
66642cb4 | 148 | /* Initialize most of rule->flow. */ |
d8ae4d67 BP |
149 | rule->flow.nw_src = match->nw_src; |
150 | rule->flow.nw_dst = match->nw_dst; | |
abe529af | 151 | rule->flow.in_port = ntohs(match->in_port); |
36956a7d | 152 | rule->flow.dl_type = ofputil_dl_type_from_openflow(match->dl_type); |
d8ae4d67 BP |
153 | rule->flow.tp_src = match->tp_src; |
154 | rule->flow.tp_dst = match->tp_dst; | |
155 | memcpy(rule->flow.dl_src, match->dl_src, ETH_ADDR_LEN); | |
156 | memcpy(rule->flow.dl_dst, match->dl_dst, ETH_ADDR_LEN); | |
7257b535 | 157 | rule->flow.tos_frag = match->nw_tos & IP_DSCP_MASK; |
d8ae4d67 BP |
158 | rule->flow.nw_proto = match->nw_proto; |
159 | ||
66642cb4 | 160 | /* Translate VLANs. */ |
47271d0d BP |
161 | if (!(ofpfw & OFPFW_DL_VLAN) && match->dl_vlan == htons(OFP_VLAN_NONE)) { |
162 | /* Match only packets without 802.1Q header. | |
163 | * | |
164 | * When OFPFW_DL_VLAN_PCP is wildcarded, this is obviously correct. | |
165 | * | |
166 | * If OFPFW_DL_VLAN_PCP is matched, the flow match is contradictory, | |
167 | * because we can't have a specific PCP without an 802.1Q header. | |
168 | * However, older versions of OVS treated this as matching packets | |
169 | * withut an 802.1Q header, so we do here too. */ | |
66642cb4 | 170 | rule->flow.vlan_tci = htons(0); |
eb6f28db | 171 | rule->wc.vlan_tci_mask = htons(0xffff); |
47271d0d BP |
172 | } else { |
173 | ovs_be16 vid, pcp, tci; | |
174 | ||
47271d0d BP |
175 | vid = match->dl_vlan & htons(VLAN_VID_MASK); |
176 | pcp = htons((match->dl_vlan_pcp << VLAN_PCP_SHIFT) & VLAN_PCP_MASK); | |
177 | tci = vid | pcp | htons(VLAN_CFI); | |
eb6f28db | 178 | rule->flow.vlan_tci = tci & rule->wc.vlan_tci_mask; |
66642cb4 BP |
179 | } |
180 | ||
d8ae4d67 BP |
181 | /* Clean up. */ |
182 | cls_rule_zero_wildcarded_fields(rule); | |
183 | } | |
184 | ||
b78f6b77 | 185 | /* Convert 'rule' into the OpenFlow match structure 'match'. */ |
d8ae4d67 | 186 | void |
b78f6b77 | 187 | ofputil_cls_rule_to_match(const struct cls_rule *rule, struct ofp_match *match) |
d8ae4d67 BP |
188 | { |
189 | const struct flow_wildcards *wc = &rule->wc; | |
eeba8e4f | 190 | uint32_t ofpfw; |
d8ae4d67 | 191 | |
66642cb4 | 192 | /* Figure out most OpenFlow wildcards. */ |
eeba8e4f | 193 | ofpfw = (OVS_FORCE uint32_t) (wc->wildcards & WC_INVARIANTS); |
d8ae4d67 BP |
194 | ofpfw |= ofputil_netmask_to_wcbits(wc->nw_src_mask) << OFPFW_NW_SRC_SHIFT; |
195 | ofpfw |= ofputil_netmask_to_wcbits(wc->nw_dst_mask) << OFPFW_NW_DST_SHIFT; | |
7257b535 | 196 | if (!(wc->tos_frag_mask & IP_DSCP_MASK)) { |
d8ae4d67 BP |
197 | ofpfw |= OFPFW_NW_TOS; |
198 | } | |
ff9d3826 | 199 | |
66642cb4 BP |
200 | /* Translate VLANs. */ |
201 | match->dl_vlan = htons(0); | |
202 | match->dl_vlan_pcp = 0; | |
203 | if (rule->wc.vlan_tci_mask == htons(0)) { | |
204 | ofpfw |= OFPFW_DL_VLAN | OFPFW_DL_VLAN_PCP; | |
205 | } else if (rule->wc.vlan_tci_mask & htons(VLAN_CFI) | |
206 | && !(rule->flow.vlan_tci & htons(VLAN_CFI))) { | |
207 | match->dl_vlan = htons(OFP_VLAN_NONE); | |
208 | } else { | |
209 | if (!(rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK))) { | |
210 | ofpfw |= OFPFW_DL_VLAN; | |
211 | } else { | |
212 | match->dl_vlan = htons(vlan_tci_to_vid(rule->flow.vlan_tci)); | |
213 | } | |
214 | ||
215 | if (!(rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK))) { | |
216 | ofpfw |= OFPFW_DL_VLAN_PCP; | |
217 | } else { | |
218 | match->dl_vlan_pcp = vlan_tci_to_pcp(rule->flow.vlan_tci); | |
219 | } | |
220 | } | |
221 | ||
222 | /* Compose most of the match structure. */ | |
d8ae4d67 | 223 | match->wildcards = htonl(ofpfw); |
abe529af | 224 | match->in_port = htons(rule->flow.in_port); |
d8ae4d67 BP |
225 | memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN); |
226 | memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN); | |
36956a7d | 227 | match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type); |
d8ae4d67 BP |
228 | match->nw_src = rule->flow.nw_src; |
229 | match->nw_dst = rule->flow.nw_dst; | |
7257b535 | 230 | match->nw_tos = rule->flow.tos_frag & IP_DSCP_MASK; |
d8ae4d67 BP |
231 | match->nw_proto = rule->flow.nw_proto; |
232 | match->tp_src = rule->flow.tp_src; | |
233 | match->tp_dst = rule->flow.tp_dst; | |
234 | memset(match->pad1, '\0', sizeof match->pad1); | |
235 | memset(match->pad2, '\0', sizeof match->pad2); | |
236 | } | |
237 | ||
36956a7d BP |
238 | /* Given a 'dl_type' value in the format used in struct flow, returns the |
239 | * corresponding 'dl_type' value for use in an OpenFlow ofp_match structure. */ | |
240 | ovs_be16 | |
241 | ofputil_dl_type_to_openflow(ovs_be16 flow_dl_type) | |
242 | { | |
243 | return (flow_dl_type == htons(FLOW_DL_TYPE_NONE) | |
244 | ? htons(OFP_DL_TYPE_NOT_ETH_TYPE) | |
245 | : flow_dl_type); | |
246 | } | |
247 | ||
248 | /* Given a 'dl_type' value in the format used in an OpenFlow ofp_match | |
249 | * structure, returns the corresponding 'dl_type' value for use in struct | |
250 | * flow. */ | |
251 | ovs_be16 | |
252 | ofputil_dl_type_from_openflow(ovs_be16 ofp_dl_type) | |
253 | { | |
254 | return (ofp_dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE) | |
255 | ? htons(FLOW_DL_TYPE_NONE) | |
256 | : ofp_dl_type); | |
257 | } | |
258 | ||
72fae175 | 259 | /* Returns a transaction ID to use for an outgoing OpenFlow message. */ |
44381c1b | 260 | static ovs_be32 |
fa37b408 BP |
261 | alloc_xid(void) |
262 | { | |
72fae175 | 263 | static uint32_t next_xid = 1; |
44381c1b | 264 | return htonl(next_xid++); |
fa37b408 | 265 | } |
d1e2cf21 BP |
266 | \f |
267 | /* Basic parsing of OpenFlow messages. */ | |
fa37b408 | 268 | |
d1e2cf21 BP |
269 | struct ofputil_msg_type { |
270 | enum ofputil_msg_code code; /* OFPUTIL_*. */ | |
271 | uint32_t value; /* OFPT_*, OFPST_*, NXT_*, or NXST_*. */ | |
272 | const char *name; /* e.g. "OFPT_FLOW_REMOVED". */ | |
273 | unsigned int min_size; /* Minimum total message size in bytes. */ | |
274 | /* 0 if 'min_size' is the exact size that the message must be. Otherwise, | |
275 | * the message may exceed 'min_size' by an even multiple of this value. */ | |
276 | unsigned int extra_multiple; | |
277 | }; | |
278 | ||
279 | struct ofputil_msg_category { | |
280 | const char *name; /* e.g. "OpenFlow message" */ | |
281 | const struct ofputil_msg_type *types; | |
282 | size_t n_types; | |
283 | int missing_error; /* ofp_mkerr() value for missing type. */ | |
284 | }; | |
285 | ||
286 | static bool | |
287 | ofputil_length_ok(const struct ofputil_msg_category *cat, | |
288 | const struct ofputil_msg_type *type, | |
289 | unsigned int size) | |
290 | { | |
291 | switch (type->extra_multiple) { | |
292 | case 0: | |
293 | if (size != type->min_size) { | |
294 | VLOG_WARN_RL(&bad_ofmsg_rl, "received %s %s with incorrect " | |
295 | "length %u (expected length %u)", | |
296 | cat->name, type->name, size, type->min_size); | |
297 | return false; | |
298 | } | |
299 | return true; | |
300 | ||
301 | case 1: | |
302 | if (size < type->min_size) { | |
303 | VLOG_WARN_RL(&bad_ofmsg_rl, "received %s %s with incorrect " | |
304 | "length %u (expected length at least %u bytes)", | |
305 | cat->name, type->name, size, type->min_size); | |
306 | return false; | |
307 | } | |
308 | return true; | |
309 | ||
310 | default: | |
311 | if (size < type->min_size | |
312 | || (size - type->min_size) % type->extra_multiple) { | |
313 | VLOG_WARN_RL(&bad_ofmsg_rl, "received %s %s with incorrect " | |
314 | "length %u (must be exactly %u bytes or longer " | |
315 | "by an integer multiple of %u bytes)", | |
316 | cat->name, type->name, size, | |
317 | type->min_size, type->extra_multiple); | |
318 | return false; | |
319 | } | |
320 | return true; | |
321 | } | |
322 | } | |
323 | ||
324 | static int | |
325 | ofputil_lookup_openflow_message(const struct ofputil_msg_category *cat, | |
326 | uint32_t value, unsigned int size, | |
327 | const struct ofputil_msg_type **typep) | |
328 | { | |
329 | const struct ofputil_msg_type *type; | |
330 | ||
331 | for (type = cat->types; type < &cat->types[cat->n_types]; type++) { | |
332 | if (type->value == value) { | |
333 | if (!ofputil_length_ok(cat, type, size)) { | |
334 | return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN); | |
335 | } | |
336 | *typep = type; | |
337 | return 0; | |
338 | } | |
339 | } | |
340 | ||
5c47debb | 341 | VLOG_WARN_RL(&bad_ofmsg_rl, "received %s of unknown type %"PRIu32, |
d1e2cf21 BP |
342 | cat->name, value); |
343 | return cat->missing_error; | |
344 | } | |
345 | ||
346 | static int | |
347 | ofputil_decode_vendor(const struct ofp_header *oh, | |
348 | const struct ofputil_msg_type **typep) | |
349 | { | |
350 | static const struct ofputil_msg_type nxt_messages[] = { | |
d1e2cf21 BP |
351 | { OFPUTIL_NXT_ROLE_REQUEST, |
352 | NXT_ROLE_REQUEST, "NXT_ROLE_REQUEST", | |
353 | sizeof(struct nx_role_request), 0 }, | |
354 | ||
355 | { OFPUTIL_NXT_ROLE_REPLY, | |
356 | NXT_ROLE_REPLY, "NXT_ROLE_REPLY", | |
357 | sizeof(struct nx_role_request), 0 }, | |
358 | ||
359 | { OFPUTIL_NXT_SET_FLOW_FORMAT, | |
360 | NXT_SET_FLOW_FORMAT, "NXT_SET_FLOW_FORMAT", | |
361 | sizeof(struct nxt_set_flow_format), 0 }, | |
362 | ||
363 | { OFPUTIL_NXT_FLOW_MOD, | |
364 | NXT_FLOW_MOD, "NXT_FLOW_MOD", | |
365 | sizeof(struct nx_flow_mod), 8 }, | |
366 | ||
367 | { OFPUTIL_NXT_FLOW_REMOVED, | |
368 | NXT_FLOW_REMOVED, "NXT_FLOW_REMOVED", | |
369 | sizeof(struct nx_flow_removed), 8 }, | |
d1e9b9bf BP |
370 | |
371 | { OFPUTIL_NXT_FLOW_MOD_TABLE_ID, | |
372 | NXT_FLOW_MOD_TABLE_ID, "NXT_FLOW_MOD_TABLE_ID", | |
373 | sizeof(struct nxt_flow_mod_table_id), 0 }, | |
d1e2cf21 BP |
374 | }; |
375 | ||
376 | static const struct ofputil_msg_category nxt_category = { | |
377 | "Nicira extension message", | |
378 | nxt_messages, ARRAY_SIZE(nxt_messages), | |
379 | OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE) | |
380 | }; | |
381 | ||
382 | const struct ofp_vendor_header *ovh; | |
383 | const struct nicira_header *nh; | |
384 | ||
385 | ovh = (const struct ofp_vendor_header *) oh; | |
386 | if (ovh->vendor != htonl(NX_VENDOR_ID)) { | |
387 | VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor message for unknown " | |
388 | "vendor %"PRIx32, ntohl(ovh->vendor)); | |
389 | return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR); | |
390 | } | |
391 | ||
392 | if (ntohs(ovh->header.length) < sizeof(struct nicira_header)) { | |
393 | VLOG_WARN_RL(&bad_ofmsg_rl, "received Nicira vendor message of " | |
394 | "length %u (expected at least %zu)", | |
395 | ntohs(ovh->header.length), sizeof(struct nicira_header)); | |
396 | return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN); | |
397 | } | |
398 | ||
399 | nh = (const struct nicira_header *) oh; | |
400 | return ofputil_lookup_openflow_message(&nxt_category, ntohl(nh->subtype), | |
401 | ntohs(oh->length), typep); | |
402 | } | |
403 | ||
404 | static int | |
405 | check_nxstats_msg(const struct ofp_header *oh) | |
406 | { | |
28c8bad1 | 407 | const struct ofp_stats_msg *osm = (const struct ofp_stats_msg *) oh; |
d1e2cf21 BP |
408 | ovs_be32 vendor; |
409 | ||
03cd3493 | 410 | memcpy(&vendor, osm + 1, sizeof vendor); |
d1e2cf21 BP |
411 | if (vendor != htonl(NX_VENDOR_ID)) { |
412 | VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor stats message for " | |
413 | "unknown vendor %"PRIx32, ntohl(vendor)); | |
414 | return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR); | |
415 | } | |
416 | ||
28c8bad1 | 417 | if (ntohs(osm->header.length) < sizeof(struct nicira_stats_msg)) { |
d1e2cf21 BP |
418 | VLOG_WARN_RL(&bad_ofmsg_rl, "truncated Nicira stats message"); |
419 | return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN); | |
420 | } | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
425 | static int | |
426 | ofputil_decode_nxst_request(const struct ofp_header *oh, | |
427 | const struct ofputil_msg_type **typep) | |
428 | { | |
429 | static const struct ofputil_msg_type nxst_requests[] = { | |
430 | { OFPUTIL_NXST_FLOW_REQUEST, | |
431 | NXST_FLOW, "NXST_FLOW request", | |
432 | sizeof(struct nx_flow_stats_request), 8 }, | |
433 | ||
434 | { OFPUTIL_NXST_AGGREGATE_REQUEST, | |
435 | NXST_AGGREGATE, "NXST_AGGREGATE request", | |
436 | sizeof(struct nx_aggregate_stats_request), 8 }, | |
437 | }; | |
438 | ||
439 | static const struct ofputil_msg_category nxst_request_category = { | |
08717852 | 440 | "Nicira extension statistics request", |
d1e2cf21 BP |
441 | nxst_requests, ARRAY_SIZE(nxst_requests), |
442 | OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE) | |
443 | }; | |
444 | ||
445 | const struct nicira_stats_msg *nsm; | |
446 | int error; | |
447 | ||
448 | error = check_nxstats_msg(oh); | |
449 | if (error) { | |
450 | return error; | |
451 | } | |
452 | ||
453 | nsm = (struct nicira_stats_msg *) oh; | |
454 | return ofputil_lookup_openflow_message(&nxst_request_category, | |
455 | ntohl(nsm->subtype), | |
456 | ntohs(oh->length), typep); | |
457 | } | |
458 | ||
459 | static int | |
460 | ofputil_decode_nxst_reply(const struct ofp_header *oh, | |
461 | const struct ofputil_msg_type **typep) | |
462 | { | |
463 | static const struct ofputil_msg_type nxst_replies[] = { | |
464 | { OFPUTIL_NXST_FLOW_REPLY, | |
465 | NXST_FLOW, "NXST_FLOW reply", | |
466 | sizeof(struct nicira_stats_msg), 8 }, | |
467 | ||
468 | { OFPUTIL_NXST_AGGREGATE_REPLY, | |
469 | NXST_AGGREGATE, "NXST_AGGREGATE reply", | |
470 | sizeof(struct nx_aggregate_stats_reply), 0 }, | |
471 | }; | |
472 | ||
473 | static const struct ofputil_msg_category nxst_reply_category = { | |
08717852 | 474 | "Nicira extension statistics reply", |
d1e2cf21 BP |
475 | nxst_replies, ARRAY_SIZE(nxst_replies), |
476 | OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE) | |
477 | }; | |
478 | ||
479 | const struct nicira_stats_msg *nsm; | |
480 | int error; | |
481 | ||
482 | error = check_nxstats_msg(oh); | |
483 | if (error) { | |
484 | return error; | |
485 | } | |
486 | ||
487 | nsm = (struct nicira_stats_msg *) oh; | |
488 | return ofputil_lookup_openflow_message(&nxst_reply_category, | |
489 | ntohl(nsm->subtype), | |
490 | ntohs(oh->length), typep); | |
491 | } | |
492 | ||
493 | static int | |
494 | ofputil_decode_ofpst_request(const struct ofp_header *oh, | |
495 | const struct ofputil_msg_type **typep) | |
496 | { | |
d1e2cf21 BP |
497 | static const struct ofputil_msg_type ofpst_requests[] = { |
498 | { OFPUTIL_OFPST_DESC_REQUEST, | |
499 | OFPST_DESC, "OFPST_DESC request", | |
63f2140a | 500 | sizeof(struct ofp_stats_msg), 0 }, |
d1e2cf21 BP |
501 | |
502 | { OFPUTIL_OFPST_FLOW_REQUEST, | |
503 | OFPST_FLOW, "OFPST_FLOW request", | |
63f2140a | 504 | sizeof(struct ofp_flow_stats_request), 0 }, |
d1e2cf21 BP |
505 | |
506 | { OFPUTIL_OFPST_AGGREGATE_REQUEST, | |
507 | OFPST_AGGREGATE, "OFPST_AGGREGATE request", | |
63f2140a | 508 | sizeof(struct ofp_flow_stats_request), 0 }, |
d1e2cf21 BP |
509 | |
510 | { OFPUTIL_OFPST_TABLE_REQUEST, | |
511 | OFPST_TABLE, "OFPST_TABLE request", | |
63f2140a | 512 | sizeof(struct ofp_stats_msg), 0 }, |
d1e2cf21 BP |
513 | |
514 | { OFPUTIL_OFPST_PORT_REQUEST, | |
515 | OFPST_PORT, "OFPST_PORT request", | |
63f2140a | 516 | sizeof(struct ofp_port_stats_request), 0 }, |
d1e2cf21 BP |
517 | |
518 | { OFPUTIL_OFPST_QUEUE_REQUEST, | |
519 | OFPST_QUEUE, "OFPST_QUEUE request", | |
63f2140a | 520 | sizeof(struct ofp_queue_stats_request), 0 }, |
d1e2cf21 BP |
521 | |
522 | { 0, | |
523 | OFPST_VENDOR, "OFPST_VENDOR request", | |
63f2140a | 524 | sizeof(struct ofp_vendor_stats_msg), 1 }, |
d1e2cf21 BP |
525 | }; |
526 | ||
527 | static const struct ofputil_msg_category ofpst_request_category = { | |
528 | "OpenFlow statistics", | |
529 | ofpst_requests, ARRAY_SIZE(ofpst_requests), | |
530 | OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT) | |
531 | }; | |
532 | ||
28c8bad1 | 533 | const struct ofp_stats_msg *request = (const struct ofp_stats_msg *) oh; |
d1e2cf21 BP |
534 | int error; |
535 | ||
d1e2cf21 | 536 | error = ofputil_lookup_openflow_message(&ofpst_request_category, |
28c8bad1 | 537 | ntohs(request->type), |
d1e2cf21 | 538 | ntohs(oh->length), typep); |
28c8bad1 | 539 | if (!error && request->type == htons(OFPST_VENDOR)) { |
d1e2cf21 BP |
540 | error = ofputil_decode_nxst_request(oh, typep); |
541 | } | |
542 | return error; | |
543 | } | |
544 | ||
545 | static int | |
546 | ofputil_decode_ofpst_reply(const struct ofp_header *oh, | |
547 | const struct ofputil_msg_type **typep) | |
548 | { | |
d1e2cf21 BP |
549 | static const struct ofputil_msg_type ofpst_replies[] = { |
550 | { OFPUTIL_OFPST_DESC_REPLY, | |
551 | OFPST_DESC, "OFPST_DESC reply", | |
63f2140a | 552 | sizeof(struct ofp_desc_stats), 0 }, |
d1e2cf21 BP |
553 | |
554 | { OFPUTIL_OFPST_FLOW_REPLY, | |
555 | OFPST_FLOW, "OFPST_FLOW reply", | |
63f2140a | 556 | sizeof(struct ofp_stats_msg), 1 }, |
d1e2cf21 BP |
557 | |
558 | { OFPUTIL_OFPST_AGGREGATE_REPLY, | |
559 | OFPST_AGGREGATE, "OFPST_AGGREGATE reply", | |
63f2140a | 560 | sizeof(struct ofp_aggregate_stats_reply), 0 }, |
d1e2cf21 BP |
561 | |
562 | { OFPUTIL_OFPST_TABLE_REPLY, | |
563 | OFPST_TABLE, "OFPST_TABLE reply", | |
63f2140a | 564 | sizeof(struct ofp_stats_msg), sizeof(struct ofp_table_stats) }, |
d1e2cf21 BP |
565 | |
566 | { OFPUTIL_OFPST_PORT_REPLY, | |
567 | OFPST_PORT, "OFPST_PORT reply", | |
63f2140a | 568 | sizeof(struct ofp_stats_msg), sizeof(struct ofp_port_stats) }, |
d1e2cf21 BP |
569 | |
570 | { OFPUTIL_OFPST_QUEUE_REPLY, | |
571 | OFPST_QUEUE, "OFPST_QUEUE reply", | |
63f2140a | 572 | sizeof(struct ofp_stats_msg), sizeof(struct ofp_queue_stats) }, |
d1e2cf21 BP |
573 | |
574 | { 0, | |
575 | OFPST_VENDOR, "OFPST_VENDOR reply", | |
63f2140a | 576 | sizeof(struct ofp_vendor_stats_msg), 1 }, |
d1e2cf21 BP |
577 | }; |
578 | ||
579 | static const struct ofputil_msg_category ofpst_reply_category = { | |
580 | "OpenFlow statistics", | |
581 | ofpst_replies, ARRAY_SIZE(ofpst_replies), | |
582 | OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT) | |
583 | }; | |
584 | ||
28c8bad1 | 585 | const struct ofp_stats_msg *reply = (const struct ofp_stats_msg *) oh; |
d1e2cf21 BP |
586 | int error; |
587 | ||
588 | error = ofputil_lookup_openflow_message(&ofpst_reply_category, | |
28c8bad1 | 589 | ntohs(reply->type), |
d1e2cf21 | 590 | ntohs(oh->length), typep); |
28c8bad1 | 591 | if (!error && reply->type == htons(OFPST_VENDOR)) { |
d1e2cf21 BP |
592 | error = ofputil_decode_nxst_reply(oh, typep); |
593 | } | |
594 | return error; | |
595 | } | |
596 | ||
597 | /* Decodes the message type represented by 'oh'. Returns 0 if successful or | |
598 | * an OpenFlow error code constructed with ofp_mkerr() on failure. Either | |
599 | * way, stores in '*typep' a type structure that can be inspected with the | |
600 | * ofputil_msg_type_*() functions. | |
601 | * | |
602 | * oh->length must indicate the correct length of the message (and must be at | |
603 | * least sizeof(struct ofp_header)). | |
604 | * | |
605 | * Success indicates that 'oh' is at least as long as the minimum-length | |
606 | * message of its type. */ | |
607 | int | |
608 | ofputil_decode_msg_type(const struct ofp_header *oh, | |
609 | const struct ofputil_msg_type **typep) | |
610 | { | |
611 | static const struct ofputil_msg_type ofpt_messages[] = { | |
612 | { OFPUTIL_OFPT_HELLO, | |
613 | OFPT_HELLO, "OFPT_HELLO", | |
614 | sizeof(struct ofp_hello), 1 }, | |
615 | ||
616 | { OFPUTIL_OFPT_ERROR, | |
617 | OFPT_ERROR, "OFPT_ERROR", | |
618 | sizeof(struct ofp_error_msg), 1 }, | |
619 | ||
620 | { OFPUTIL_OFPT_ECHO_REQUEST, | |
621 | OFPT_ECHO_REQUEST, "OFPT_ECHO_REQUEST", | |
622 | sizeof(struct ofp_header), 1 }, | |
623 | ||
624 | { OFPUTIL_OFPT_ECHO_REPLY, | |
625 | OFPT_ECHO_REPLY, "OFPT_ECHO_REPLY", | |
626 | sizeof(struct ofp_header), 1 }, | |
627 | ||
628 | { OFPUTIL_OFPT_FEATURES_REQUEST, | |
629 | OFPT_FEATURES_REQUEST, "OFPT_FEATURES_REQUEST", | |
630 | sizeof(struct ofp_header), 0 }, | |
631 | ||
632 | { OFPUTIL_OFPT_FEATURES_REPLY, | |
633 | OFPT_FEATURES_REPLY, "OFPT_FEATURES_REPLY", | |
634 | sizeof(struct ofp_switch_features), sizeof(struct ofp_phy_port) }, | |
635 | ||
636 | { OFPUTIL_OFPT_GET_CONFIG_REQUEST, | |
637 | OFPT_GET_CONFIG_REQUEST, "OFPT_GET_CONFIG_REQUEST", | |
638 | sizeof(struct ofp_header), 0 }, | |
639 | ||
640 | { OFPUTIL_OFPT_GET_CONFIG_REPLY, | |
641 | OFPT_GET_CONFIG_REPLY, "OFPT_GET_CONFIG_REPLY", | |
642 | sizeof(struct ofp_switch_config), 0 }, | |
643 | ||
644 | { OFPUTIL_OFPT_SET_CONFIG, | |
645 | OFPT_SET_CONFIG, "OFPT_SET_CONFIG", | |
646 | sizeof(struct ofp_switch_config), 0 }, | |
647 | ||
648 | { OFPUTIL_OFPT_PACKET_IN, | |
649 | OFPT_PACKET_IN, "OFPT_PACKET_IN", | |
650 | offsetof(struct ofp_packet_in, data), 1 }, | |
651 | ||
652 | { OFPUTIL_OFPT_FLOW_REMOVED, | |
653 | OFPT_FLOW_REMOVED, "OFPT_FLOW_REMOVED", | |
654 | sizeof(struct ofp_flow_removed), 0 }, | |
655 | ||
656 | { OFPUTIL_OFPT_PORT_STATUS, | |
657 | OFPT_PORT_STATUS, "OFPT_PORT_STATUS", | |
658 | sizeof(struct ofp_port_status), 0 }, | |
659 | ||
660 | { OFPUTIL_OFPT_PACKET_OUT, | |
661 | OFPT_PACKET_OUT, "OFPT_PACKET_OUT", | |
662 | sizeof(struct ofp_packet_out), 1 }, | |
663 | ||
664 | { OFPUTIL_OFPT_FLOW_MOD, | |
665 | OFPT_FLOW_MOD, "OFPT_FLOW_MOD", | |
666 | sizeof(struct ofp_flow_mod), 1 }, | |
667 | ||
668 | { OFPUTIL_OFPT_PORT_MOD, | |
669 | OFPT_PORT_MOD, "OFPT_PORT_MOD", | |
670 | sizeof(struct ofp_port_mod), 0 }, | |
671 | ||
672 | { 0, | |
673 | OFPT_STATS_REQUEST, "OFPT_STATS_REQUEST", | |
28c8bad1 | 674 | sizeof(struct ofp_stats_msg), 1 }, |
d1e2cf21 BP |
675 | |
676 | { 0, | |
677 | OFPT_STATS_REPLY, "OFPT_STATS_REPLY", | |
28c8bad1 | 678 | sizeof(struct ofp_stats_msg), 1 }, |
d1e2cf21 BP |
679 | |
680 | { OFPUTIL_OFPT_BARRIER_REQUEST, | |
681 | OFPT_BARRIER_REQUEST, "OFPT_BARRIER_REQUEST", | |
682 | sizeof(struct ofp_header), 0 }, | |
683 | ||
684 | { OFPUTIL_OFPT_BARRIER_REPLY, | |
685 | OFPT_BARRIER_REPLY, "OFPT_BARRIER_REPLY", | |
686 | sizeof(struct ofp_header), 0 }, | |
687 | ||
688 | { 0, | |
689 | OFPT_VENDOR, "OFPT_VENDOR", | |
690 | sizeof(struct ofp_vendor_header), 1 }, | |
691 | }; | |
692 | ||
693 | static const struct ofputil_msg_category ofpt_category = { | |
694 | "OpenFlow message", | |
695 | ofpt_messages, ARRAY_SIZE(ofpt_messages), | |
696 | OFP_MKERR(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE) | |
697 | }; | |
698 | ||
699 | int error; | |
700 | ||
701 | error = ofputil_lookup_openflow_message(&ofpt_category, oh->type, | |
702 | ntohs(oh->length), typep); | |
703 | if (!error) { | |
704 | switch (oh->type) { | |
705 | case OFPT_VENDOR: | |
706 | error = ofputil_decode_vendor(oh, typep); | |
707 | break; | |
708 | ||
709 | case OFPT_STATS_REQUEST: | |
710 | error = ofputil_decode_ofpst_request(oh, typep); | |
711 | break; | |
712 | ||
713 | case OFPT_STATS_REPLY: | |
714 | error = ofputil_decode_ofpst_reply(oh, typep); | |
715 | ||
716 | default: | |
717 | break; | |
718 | } | |
719 | } | |
720 | if (error) { | |
721 | static const struct ofputil_msg_type ofputil_invalid_type = { | |
8f93e93c BP |
722 | OFPUTIL_MSG_INVALID, |
723 | 0, "OFPUTIL_MSG_INVALID", | |
d1e2cf21 BP |
724 | 0, 0 |
725 | }; | |
726 | ||
727 | *typep = &ofputil_invalid_type; | |
728 | } | |
729 | return error; | |
730 | } | |
731 | ||
732 | /* Returns an OFPUTIL_* message type code for 'type'. */ | |
733 | enum ofputil_msg_code | |
734 | ofputil_msg_type_code(const struct ofputil_msg_type *type) | |
735 | { | |
736 | return type->code; | |
737 | } | |
2e4f5fcf | 738 | \f |
7fa91113 BP |
739 | /* Flow formats. */ |
740 | ||
741 | bool | |
742 | ofputil_flow_format_is_valid(enum nx_flow_format flow_format) | |
743 | { | |
744 | switch (flow_format) { | |
745 | case NXFF_OPENFLOW10: | |
7fa91113 BP |
746 | case NXFF_NXM: |
747 | return true; | |
748 | } | |
749 | ||
750 | return false; | |
751 | } | |
752 | ||
753 | const char * | |
754 | ofputil_flow_format_to_string(enum nx_flow_format flow_format) | |
755 | { | |
756 | switch (flow_format) { | |
757 | case NXFF_OPENFLOW10: | |
758 | return "openflow10"; | |
7fa91113 BP |
759 | case NXFF_NXM: |
760 | return "nxm"; | |
761 | default: | |
762 | NOT_REACHED(); | |
763 | } | |
764 | } | |
765 | ||
88ca35ee BP |
766 | int |
767 | ofputil_flow_format_from_string(const char *s) | |
768 | { | |
769 | return (!strcmp(s, "openflow10") ? NXFF_OPENFLOW10 | |
88ca35ee BP |
770 | : !strcmp(s, "nxm") ? NXFF_NXM |
771 | : -1); | |
772 | } | |
773 | ||
774 | static bool | |
775 | regs_fully_wildcarded(const struct flow_wildcards *wc) | |
776 | { | |
777 | int i; | |
778 | ||
779 | for (i = 0; i < FLOW_N_REGS; i++) { | |
780 | if (wc->reg_masks[i] != 0) { | |
781 | return false; | |
782 | } | |
783 | } | |
784 | return true; | |
785 | } | |
786 | ||
b78f6b77 BP |
787 | /* Returns the minimum nx_flow_format to use for sending 'rule' to a switch |
788 | * (e.g. to add or remove a flow). Only NXM can handle tunnel IDs, registers, | |
789 | * or fixing the Ethernet multicast bit. Otherwise, it's better to use | |
790 | * NXFF_OPENFLOW10 for backward compatibility. */ | |
791 | enum nx_flow_format | |
792 | ofputil_min_flow_format(const struct cls_rule *rule) | |
8368c090 BP |
793 | { |
794 | const struct flow_wildcards *wc = &rule->wc; | |
8368c090 | 795 | |
7257b535 | 796 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 3); |
a877206f | 797 | |
8368c090 BP |
798 | /* Only NXM supports separately wildcards the Ethernet multicast bit. */ |
799 | if (!(wc->wildcards & FWW_DL_DST) != !(wc->wildcards & FWW_ETH_MCAST)) { | |
b78f6b77 | 800 | return NXFF_NXM; |
8368c090 BP |
801 | } |
802 | ||
bad68a99 JP |
803 | /* Only NXM supports matching ARP hardware addresses. */ |
804 | if (!(wc->wildcards & FWW_ARP_SHA) || !(wc->wildcards & FWW_ARP_THA)) { | |
b78f6b77 | 805 | return NXFF_NXM; |
bad68a99 JP |
806 | } |
807 | ||
d31f1109 JP |
808 | /* Only NXM supports matching IPv6 traffic. */ |
809 | if (!(wc->wildcards & FWW_DL_TYPE) | |
810 | && (rule->flow.dl_type == htons(ETH_TYPE_IPV6))) { | |
b78f6b77 | 811 | return NXFF_NXM; |
d31f1109 JP |
812 | } |
813 | ||
8368c090 BP |
814 | /* Only NXM supports matching registers. */ |
815 | if (!regs_fully_wildcarded(wc)) { | |
b78f6b77 | 816 | return NXFF_NXM; |
8368c090 BP |
817 | } |
818 | ||
b78f6b77 BP |
819 | /* Only NXM supports matching tun_id. */ |
820 | if (wc->tun_id_mask != htonll(0)) { | |
821 | return NXFF_NXM; | |
8368c090 BP |
822 | } |
823 | ||
7257b535 BP |
824 | /* Only NXM supports matching fragments. */ |
825 | if (wc->tos_frag_mask & FLOW_FRAG_MASK) { | |
826 | return NXFF_NXM; | |
827 | } | |
828 | ||
8368c090 | 829 | /* Other formats can express this rule. */ |
b78f6b77 | 830 | return NXFF_OPENFLOW10; |
88ca35ee BP |
831 | } |
832 | ||
833 | /* Returns an OpenFlow message that can be used to set the flow format to | |
834 | * 'flow_format'. */ | |
835 | struct ofpbuf * | |
836 | ofputil_make_set_flow_format(enum nx_flow_format flow_format) | |
837 | { | |
b78f6b77 | 838 | struct nxt_set_flow_format *sff; |
88ca35ee BP |
839 | struct ofpbuf *msg; |
840 | ||
b78f6b77 BP |
841 | sff = make_nxmsg(sizeof *sff, NXT_SET_FLOW_FORMAT, &msg); |
842 | sff->format = htonl(flow_format); | |
88ca35ee BP |
843 | |
844 | return msg; | |
845 | } | |
846 | ||
6c1491fb BP |
847 | /* Returns an OpenFlow message that can be used to turn the flow_mod_table_id |
848 | * extension on or off (according to 'flow_mod_table_id'). */ | |
849 | struct ofpbuf * | |
850 | ofputil_make_flow_mod_table_id(bool flow_mod_table_id) | |
851 | { | |
852 | struct nxt_flow_mod_table_id *nfmti; | |
853 | struct ofpbuf *msg; | |
854 | ||
855 | nfmti = make_nxmsg(sizeof *nfmti, NXT_FLOW_MOD_TABLE_ID, &msg); | |
856 | nfmti->set = flow_mod_table_id; | |
857 | return msg; | |
858 | } | |
859 | ||
7fa91113 BP |
860 | /* Converts an OFPT_FLOW_MOD or NXT_FLOW_MOD message 'oh' into an abstract |
861 | * flow_mod in 'fm'. Returns 0 if successful, otherwise an OpenFlow error | |
862 | * code. | |
863 | * | |
6c1491fb BP |
864 | * 'flow_mod_table_id' should be true if the NXT_FLOW_MOD_TABLE_ID extension is |
865 | * enabled, false otherwise. | |
866 | * | |
2e4f5fcf BP |
867 | * Does not validate the flow_mod actions. */ |
868 | int | |
a9a2da38 BP |
869 | ofputil_decode_flow_mod(struct ofputil_flow_mod *fm, |
870 | const struct ofp_header *oh, bool flow_mod_table_id) | |
2e4f5fcf BP |
871 | { |
872 | const struct ofputil_msg_type *type; | |
6c1491fb | 873 | uint16_t command; |
2e4f5fcf BP |
874 | struct ofpbuf b; |
875 | ||
2013493b | 876 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); |
2e4f5fcf BP |
877 | |
878 | ofputil_decode_msg_type(oh, &type); | |
879 | if (ofputil_msg_type_code(type) == OFPUTIL_OFPT_FLOW_MOD) { | |
880 | /* Standard OpenFlow flow_mod. */ | |
2e4f5fcf | 881 | const struct ofp_flow_mod *ofm; |
1c0b7503 | 882 | uint16_t priority; |
2e4f5fcf BP |
883 | int error; |
884 | ||
885 | /* Dissect the message. */ | |
bbc32a88 | 886 | ofm = ofpbuf_pull(&b, sizeof *ofm); |
2e4f5fcf BP |
887 | error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions); |
888 | if (error) { | |
889 | return error; | |
890 | } | |
891 | ||
1c0b7503 BP |
892 | /* Set priority based on original wildcards. Normally we'd allow |
893 | * ofputil_cls_rule_from_match() to do this for us, but | |
b459a924 | 894 | * ofputil_normalize_rule() can put wildcards where the original flow |
1c0b7503 BP |
895 | * didn't have them. */ |
896 | priority = ntohs(ofm->priority); | |
897 | if (!(ofm->match.wildcards & htonl(OFPFW_ALL))) { | |
898 | priority = UINT16_MAX; | |
899 | } | |
900 | ||
b459a924 BP |
901 | /* Translate the rule. */ |
902 | ofputil_cls_rule_from_match(&ofm->match, priority, &fm->cr); | |
903 | ofputil_normalize_rule(&fm->cr, NXFF_OPENFLOW10); | |
2e4f5fcf BP |
904 | |
905 | /* Translate the message. */ | |
2e4f5fcf | 906 | fm->cookie = ofm->cookie; |
6c1491fb | 907 | command = ntohs(ofm->command); |
2e4f5fcf BP |
908 | fm->idle_timeout = ntohs(ofm->idle_timeout); |
909 | fm->hard_timeout = ntohs(ofm->hard_timeout); | |
910 | fm->buffer_id = ntohl(ofm->buffer_id); | |
911 | fm->out_port = ntohs(ofm->out_port); | |
912 | fm->flags = ntohs(ofm->flags); | |
913 | } else if (ofputil_msg_type_code(type) == OFPUTIL_NXT_FLOW_MOD) { | |
914 | /* Nicira extended flow_mod. */ | |
915 | const struct nx_flow_mod *nfm; | |
916 | int error; | |
917 | ||
918 | /* Dissect the message. */ | |
bbc32a88 | 919 | nfm = ofpbuf_pull(&b, sizeof *nfm); |
2e4f5fcf BP |
920 | error = nx_pull_match(&b, ntohs(nfm->match_len), ntohs(nfm->priority), |
921 | &fm->cr); | |
922 | if (error) { | |
923 | return error; | |
924 | } | |
925 | error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions); | |
926 | if (error) { | |
927 | return error; | |
928 | } | |
929 | ||
930 | /* Translate the message. */ | |
931 | fm->cookie = nfm->cookie; | |
6c1491fb | 932 | command = ntohs(nfm->command); |
2e4f5fcf BP |
933 | fm->idle_timeout = ntohs(nfm->idle_timeout); |
934 | fm->hard_timeout = ntohs(nfm->hard_timeout); | |
935 | fm->buffer_id = ntohl(nfm->buffer_id); | |
936 | fm->out_port = ntohs(nfm->out_port); | |
937 | fm->flags = ntohs(nfm->flags); | |
938 | } else { | |
939 | NOT_REACHED(); | |
940 | } | |
941 | ||
6c1491fb BP |
942 | if (flow_mod_table_id) { |
943 | fm->command = command & 0xff; | |
944 | fm->table_id = command >> 8; | |
945 | } else { | |
946 | fm->command = command; | |
947 | fm->table_id = 0xff; | |
948 | } | |
949 | ||
2e4f5fcf BP |
950 | return 0; |
951 | } | |
952 | ||
953 | /* Converts 'fm' into an OFPT_FLOW_MOD or NXT_FLOW_MOD message according to | |
6c1491fb BP |
954 | * 'flow_format' and returns the message. |
955 | * | |
956 | * 'flow_mod_table_id' should be true if the NXT_FLOW_MOD_TABLE_ID extension is | |
957 | * enabled, false otherwise. */ | |
2e4f5fcf | 958 | struct ofpbuf * |
a9a2da38 | 959 | ofputil_encode_flow_mod(const struct ofputil_flow_mod *fm, |
6c1491fb BP |
960 | enum nx_flow_format flow_format, |
961 | bool flow_mod_table_id) | |
2e4f5fcf BP |
962 | { |
963 | size_t actions_len = fm->n_actions * sizeof *fm->actions; | |
964 | struct ofpbuf *msg; | |
6c1491fb BP |
965 | uint16_t command; |
966 | ||
967 | command = (flow_mod_table_id | |
968 | ? (fm->command & 0xff) | (fm->table_id << 8) | |
969 | : fm->command); | |
2e4f5fcf | 970 | |
b78f6b77 | 971 | if (flow_format == NXFF_OPENFLOW10) { |
2e4f5fcf BP |
972 | struct ofp_flow_mod *ofm; |
973 | ||
974 | msg = ofpbuf_new(sizeof *ofm + actions_len); | |
975 | ofm = put_openflow(sizeof *ofm, OFPT_FLOW_MOD, msg); | |
b78f6b77 BP |
976 | ofputil_cls_rule_to_match(&fm->cr, &ofm->match); |
977 | ofm->cookie = fm->cookie; | |
05411977 | 978 | ofm->command = htons(command); |
2e4f5fcf BP |
979 | ofm->idle_timeout = htons(fm->idle_timeout); |
980 | ofm->hard_timeout = htons(fm->hard_timeout); | |
981 | ofm->priority = htons(fm->cr.priority); | |
982 | ofm->buffer_id = htonl(fm->buffer_id); | |
983 | ofm->out_port = htons(fm->out_port); | |
984 | ofm->flags = htons(fm->flags); | |
985 | } else if (flow_format == NXFF_NXM) { | |
986 | struct nx_flow_mod *nfm; | |
987 | int match_len; | |
988 | ||
989 | msg = ofpbuf_new(sizeof *nfm + NXM_TYPICAL_LEN + actions_len); | |
990 | put_nxmsg(sizeof *nfm, NXT_FLOW_MOD, msg); | |
991 | match_len = nx_put_match(msg, &fm->cr); | |
992 | ||
993 | nfm = msg->data; | |
994 | nfm->cookie = fm->cookie; | |
6c1491fb | 995 | nfm->command = htons(command); |
2e4f5fcf BP |
996 | nfm->idle_timeout = htons(fm->idle_timeout); |
997 | nfm->hard_timeout = htons(fm->hard_timeout); | |
998 | nfm->priority = htons(fm->cr.priority); | |
999 | nfm->buffer_id = htonl(fm->buffer_id); | |
1000 | nfm->out_port = htons(fm->out_port); | |
1001 | nfm->flags = htons(fm->flags); | |
1002 | nfm->match_len = htons(match_len); | |
1003 | } else { | |
1004 | NOT_REACHED(); | |
1005 | } | |
1006 | ||
1007 | ofpbuf_put(msg, fm->actions, actions_len); | |
1008 | update_openflow_length(msg); | |
1009 | return msg; | |
1010 | } | |
1011 | ||
1012 | static int | |
81d1ea94 | 1013 | ofputil_decode_ofpst_flow_request(struct ofputil_flow_stats_request *fsr, |
2e4f5fcf | 1014 | const struct ofp_header *oh, |
2e4f5fcf BP |
1015 | bool aggregate) |
1016 | { | |
63f2140a BP |
1017 | const struct ofp_flow_stats_request *ofsr = |
1018 | (const struct ofp_flow_stats_request *) oh; | |
2e4f5fcf BP |
1019 | |
1020 | fsr->aggregate = aggregate; | |
b78f6b77 | 1021 | ofputil_cls_rule_from_match(&ofsr->match, 0, &fsr->match); |
2e4f5fcf BP |
1022 | fsr->out_port = ntohs(ofsr->out_port); |
1023 | fsr->table_id = ofsr->table_id; | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | static int | |
81d1ea94 | 1029 | ofputil_decode_nxst_flow_request(struct ofputil_flow_stats_request *fsr, |
2e4f5fcf BP |
1030 | const struct ofp_header *oh, |
1031 | bool aggregate) | |
1032 | { | |
1033 | const struct nx_flow_stats_request *nfsr; | |
1034 | struct ofpbuf b; | |
1035 | int error; | |
1036 | ||
2013493b | 1037 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); |
2e4f5fcf | 1038 | |
bbc32a88 | 1039 | nfsr = ofpbuf_pull(&b, sizeof *nfsr); |
2e4f5fcf BP |
1040 | error = nx_pull_match(&b, ntohs(nfsr->match_len), 0, &fsr->match); |
1041 | if (error) { | |
1042 | return error; | |
1043 | } | |
1044 | if (b.size) { | |
1045 | return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN); | |
1046 | } | |
1047 | ||
1048 | fsr->aggregate = aggregate; | |
1049 | fsr->out_port = ntohs(nfsr->out_port); | |
1050 | fsr->table_id = nfsr->table_id; | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | /* Converts an OFPST_FLOW, OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE | |
b78f6b77 BP |
1056 | * request 'oh', into an abstract flow_stats_request in 'fsr'. Returns 0 if |
1057 | * successful, otherwise an OpenFlow error code. */ | |
2e4f5fcf | 1058 | int |
81d1ea94 | 1059 | ofputil_decode_flow_stats_request(struct ofputil_flow_stats_request *fsr, |
b78f6b77 | 1060 | const struct ofp_header *oh) |
2e4f5fcf BP |
1061 | { |
1062 | const struct ofputil_msg_type *type; | |
1063 | struct ofpbuf b; | |
1064 | int code; | |
1065 | ||
2013493b | 1066 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); |
2e4f5fcf BP |
1067 | |
1068 | ofputil_decode_msg_type(oh, &type); | |
1069 | code = ofputil_msg_type_code(type); | |
1070 | switch (code) { | |
1071 | case OFPUTIL_OFPST_FLOW_REQUEST: | |
b78f6b77 | 1072 | return ofputil_decode_ofpst_flow_request(fsr, oh, false); |
2e4f5fcf BP |
1073 | |
1074 | case OFPUTIL_OFPST_AGGREGATE_REQUEST: | |
b78f6b77 | 1075 | return ofputil_decode_ofpst_flow_request(fsr, oh, true); |
2e4f5fcf BP |
1076 | |
1077 | case OFPUTIL_NXST_FLOW_REQUEST: | |
1078 | return ofputil_decode_nxst_flow_request(fsr, oh, false); | |
1079 | ||
1080 | case OFPUTIL_NXST_AGGREGATE_REQUEST: | |
1081 | return ofputil_decode_nxst_flow_request(fsr, oh, true); | |
1082 | ||
1083 | default: | |
1084 | /* Hey, the caller lied. */ | |
1085 | NOT_REACHED(); | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | /* Converts abstract flow_stats_request 'fsr' into an OFPST_FLOW, | |
4ffd1b43 | 1090 | * OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE request 'oh' according to |
2e4f5fcf BP |
1091 | * 'flow_format', and returns the message. */ |
1092 | struct ofpbuf * | |
81d1ea94 | 1093 | ofputil_encode_flow_stats_request(const struct ofputil_flow_stats_request *fsr, |
2e4f5fcf BP |
1094 | enum nx_flow_format flow_format) |
1095 | { | |
1096 | struct ofpbuf *msg; | |
1097 | ||
b78f6b77 | 1098 | if (flow_format == NXFF_OPENFLOW10) { |
2e4f5fcf BP |
1099 | struct ofp_flow_stats_request *ofsr; |
1100 | int type; | |
1101 | ||
2e4f5fcf | 1102 | type = fsr->aggregate ? OFPST_AGGREGATE : OFPST_FLOW; |
63f2140a | 1103 | ofsr = ofputil_make_stats_request(sizeof *ofsr, type, 0, &msg); |
b78f6b77 | 1104 | ofputil_cls_rule_to_match(&fsr->match, &ofsr->match); |
2e4f5fcf BP |
1105 | ofsr->table_id = fsr->table_id; |
1106 | ofsr->out_port = htons(fsr->out_port); | |
1107 | } else if (flow_format == NXFF_NXM) { | |
1108 | struct nx_flow_stats_request *nfsr; | |
1109 | int match_len; | |
9fb7fa87 | 1110 | int subtype; |
2e4f5fcf | 1111 | |
9fb7fa87 | 1112 | subtype = fsr->aggregate ? NXST_AGGREGATE : NXST_FLOW; |
63f2140a | 1113 | ofputil_make_stats_request(sizeof *nfsr, OFPST_VENDOR, subtype, &msg); |
2e4f5fcf BP |
1114 | match_len = nx_put_match(msg, &fsr->match); |
1115 | ||
1116 | nfsr = msg->data; | |
1117 | nfsr->out_port = htons(fsr->out_port); | |
1118 | nfsr->match_len = htons(match_len); | |
1119 | nfsr->table_id = fsr->table_id; | |
1120 | } else { | |
1121 | NOT_REACHED(); | |
1122 | } | |
1123 | ||
1124 | return msg; | |
1125 | } | |
d1e2cf21 | 1126 | |
4ffd1b43 | 1127 | /* Converts an OFPST_FLOW or NXST_FLOW reply in 'msg' into an abstract |
b78f6b77 | 1128 | * ofputil_flow_stats in 'fs'. |
4ffd1b43 BP |
1129 | * |
1130 | * Multiple OFPST_FLOW or NXST_FLOW replies can be packed into a single | |
1131 | * OpenFlow message. Calling this function multiple times for a single 'msg' | |
1132 | * iterates through the replies. The caller must initially leave 'msg''s layer | |
1133 | * pointers null and not modify them between calls. | |
1134 | * | |
1135 | * Returns 0 if successful, EOF if no replies were left in this 'msg', | |
1136 | * otherwise a positive errno value. */ | |
1137 | int | |
1138 | ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *fs, | |
b78f6b77 | 1139 | struct ofpbuf *msg) |
4ffd1b43 BP |
1140 | { |
1141 | const struct ofputil_msg_type *type; | |
1142 | int code; | |
1143 | ||
1144 | ofputil_decode_msg_type(msg->l2 ? msg->l2 : msg->data, &type); | |
1145 | code = ofputil_msg_type_code(type); | |
1146 | if (!msg->l2) { | |
1147 | msg->l2 = msg->data; | |
1148 | if (code == OFPUTIL_OFPST_FLOW_REPLY) { | |
28c8bad1 | 1149 | ofpbuf_pull(msg, sizeof(struct ofp_stats_msg)); |
4ffd1b43 BP |
1150 | } else if (code == OFPUTIL_NXST_FLOW_REPLY) { |
1151 | ofpbuf_pull(msg, sizeof(struct nicira_stats_msg)); | |
1152 | } else { | |
1153 | NOT_REACHED(); | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | if (!msg->size) { | |
1158 | return EOF; | |
1159 | } else if (code == OFPUTIL_OFPST_FLOW_REPLY) { | |
1160 | const struct ofp_flow_stats *ofs; | |
1161 | size_t length; | |
1162 | ||
1163 | ofs = ofpbuf_try_pull(msg, sizeof *ofs); | |
1164 | if (!ofs) { | |
1165 | VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply has %zu leftover " | |
1166 | "bytes at end", msg->size); | |
1167 | return EINVAL; | |
1168 | } | |
1169 | ||
1170 | length = ntohs(ofs->length); | |
1171 | if (length < sizeof *ofs) { | |
1172 | VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply claims invalid " | |
1173 | "length %zu", length); | |
1174 | return EINVAL; | |
1175 | } | |
1176 | ||
1177 | if (ofputil_pull_actions(msg, length - sizeof *ofs, | |
1178 | &fs->actions, &fs->n_actions)) { | |
1179 | return EINVAL; | |
1180 | } | |
1181 | ||
1182 | fs->cookie = get_32aligned_be64(&ofs->cookie); | |
1183 | ofputil_cls_rule_from_match(&ofs->match, ntohs(ofs->priority), | |
b78f6b77 | 1184 | &fs->rule); |
4ffd1b43 BP |
1185 | fs->table_id = ofs->table_id; |
1186 | fs->duration_sec = ntohl(ofs->duration_sec); | |
1187 | fs->duration_nsec = ntohl(ofs->duration_nsec); | |
1188 | fs->idle_timeout = ntohs(ofs->idle_timeout); | |
1189 | fs->hard_timeout = ntohs(ofs->hard_timeout); | |
1190 | fs->packet_count = ntohll(get_32aligned_be64(&ofs->packet_count)); | |
1191 | fs->byte_count = ntohll(get_32aligned_be64(&ofs->byte_count)); | |
1192 | } else if (code == OFPUTIL_NXST_FLOW_REPLY) { | |
1193 | const struct nx_flow_stats *nfs; | |
1194 | size_t match_len, length; | |
1195 | ||
1196 | nfs = ofpbuf_try_pull(msg, sizeof *nfs); | |
1197 | if (!nfs) { | |
1198 | VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply has %zu leftover " | |
1199 | "bytes at end", msg->size); | |
1200 | return EINVAL; | |
1201 | } | |
1202 | ||
1203 | length = ntohs(nfs->length); | |
1204 | match_len = ntohs(nfs->match_len); | |
1205 | if (length < sizeof *nfs + ROUND_UP(match_len, 8)) { | |
1206 | VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply with match_len=%zu " | |
1207 | "claims invalid length %zu", match_len, length); | |
1208 | return EINVAL; | |
1209 | } | |
1210 | if (nx_pull_match(msg, match_len, ntohs(nfs->priority), &fs->rule)) { | |
1211 | return EINVAL; | |
1212 | } | |
1213 | ||
1214 | if (ofputil_pull_actions(msg, | |
1215 | length - sizeof *nfs - ROUND_UP(match_len, 8), | |
1216 | &fs->actions, &fs->n_actions)) { | |
1217 | return EINVAL; | |
1218 | } | |
1219 | ||
1220 | fs->cookie = nfs->cookie; | |
1221 | fs->table_id = nfs->table_id; | |
1222 | fs->duration_sec = ntohl(nfs->duration_sec); | |
1223 | fs->duration_nsec = ntohl(nfs->duration_nsec); | |
1224 | fs->idle_timeout = ntohs(nfs->idle_timeout); | |
1225 | fs->hard_timeout = ntohs(nfs->hard_timeout); | |
1226 | fs->packet_count = ntohll(nfs->packet_count); | |
1227 | fs->byte_count = ntohll(nfs->byte_count); | |
1228 | } else { | |
1229 | NOT_REACHED(); | |
1230 | } | |
1231 | ||
1232 | return 0; | |
1233 | } | |
1234 | ||
5e9d0469 BP |
1235 | /* Returns 'count' unchanged except that UINT64_MAX becomes 0. |
1236 | * | |
1237 | * We use this in situations where OVS internally uses UINT64_MAX to mean | |
1238 | * "value unknown" but OpenFlow 1.0 does not define any unknown value. */ | |
1239 | static uint64_t | |
1240 | unknown_to_zero(uint64_t count) | |
1241 | { | |
1242 | return count != UINT64_MAX ? count : 0; | |
1243 | } | |
1244 | ||
349adfb2 BP |
1245 | /* Appends an OFPST_FLOW or NXST_FLOW reply that contains the data in 'fs' to |
1246 | * those already present in the list of ofpbufs in 'replies'. 'replies' should | |
1247 | * have been initialized with ofputil_start_stats_reply(). */ | |
1248 | void | |
1249 | ofputil_append_flow_stats_reply(const struct ofputil_flow_stats *fs, | |
1250 | struct list *replies) | |
1251 | { | |
1252 | size_t act_len = fs->n_actions * sizeof *fs->actions; | |
1253 | const struct ofp_stats_msg *osm; | |
1254 | ||
1255 | osm = ofpbuf_from_list(list_back(replies))->data; | |
1256 | if (osm->type == htons(OFPST_FLOW)) { | |
1257 | size_t len = offsetof(struct ofp_flow_stats, actions) + act_len; | |
1258 | struct ofp_flow_stats *ofs; | |
1259 | ||
1260 | ofs = ofputil_append_stats_reply(len, replies); | |
1261 | ofs->length = htons(len); | |
1262 | ofs->table_id = fs->table_id; | |
1263 | ofs->pad = 0; | |
1264 | ofputil_cls_rule_to_match(&fs->rule, &ofs->match); | |
1265 | ofs->duration_sec = htonl(fs->duration_sec); | |
1266 | ofs->duration_nsec = htonl(fs->duration_nsec); | |
1267 | ofs->priority = htons(fs->rule.priority); | |
1268 | ofs->idle_timeout = htons(fs->idle_timeout); | |
1269 | ofs->hard_timeout = htons(fs->hard_timeout); | |
1270 | memset(ofs->pad2, 0, sizeof ofs->pad2); | |
1271 | put_32aligned_be64(&ofs->cookie, fs->cookie); | |
5e9d0469 BP |
1272 | put_32aligned_be64(&ofs->packet_count, |
1273 | htonll(unknown_to_zero(fs->packet_count))); | |
1274 | put_32aligned_be64(&ofs->byte_count, | |
1275 | htonll(unknown_to_zero(fs->byte_count))); | |
349adfb2 BP |
1276 | memcpy(ofs->actions, fs->actions, act_len); |
1277 | } else if (osm->type == htons(OFPST_VENDOR)) { | |
1278 | struct nx_flow_stats *nfs; | |
1279 | struct ofpbuf *msg; | |
1280 | size_t start_len; | |
1281 | ||
1282 | msg = ofputil_reserve_stats_reply( | |
1283 | sizeof *nfs + NXM_MAX_LEN + act_len, replies); | |
1284 | start_len = msg->size; | |
1285 | ||
1286 | nfs = ofpbuf_put_uninit(msg, sizeof *nfs); | |
1287 | nfs->table_id = fs->table_id; | |
1288 | nfs->pad = 0; | |
1289 | nfs->duration_sec = htonl(fs->duration_sec); | |
1290 | nfs->duration_nsec = htonl(fs->duration_nsec); | |
1291 | nfs->priority = htons(fs->rule.priority); | |
1292 | nfs->idle_timeout = htons(fs->idle_timeout); | |
1293 | nfs->hard_timeout = htons(fs->hard_timeout); | |
1294 | nfs->match_len = htons(nx_put_match(msg, &fs->rule)); | |
1295 | memset(nfs->pad2, 0, sizeof nfs->pad2); | |
1296 | nfs->cookie = fs->cookie; | |
1297 | nfs->packet_count = htonll(fs->packet_count); | |
1298 | nfs->byte_count = htonll(fs->byte_count); | |
1299 | ofpbuf_put(msg, fs->actions, act_len); | |
1300 | nfs->length = htons(msg->size - start_len); | |
1301 | } else { | |
1302 | NOT_REACHED(); | |
1303 | } | |
1304 | } | |
1305 | ||
76c93b22 BP |
1306 | /* Converts abstract ofputil_aggregate_stats 'stats' into an OFPST_AGGREGATE or |
1307 | * NXST_AGGREGATE reply according to 'flow_format', and returns the message. */ | |
1308 | struct ofpbuf * | |
1309 | ofputil_encode_aggregate_stats_reply( | |
1310 | const struct ofputil_aggregate_stats *stats, | |
1311 | const struct ofp_stats_msg *request) | |
1312 | { | |
1313 | struct ofpbuf *msg; | |
1314 | ||
1315 | if (request->type == htons(OFPST_AGGREGATE)) { | |
1316 | struct ofp_aggregate_stats_reply *asr; | |
1317 | ||
1318 | asr = ofputil_make_stats_reply(sizeof *asr, request, &msg); | |
5e9d0469 BP |
1319 | put_32aligned_be64(&asr->packet_count, |
1320 | htonll(unknown_to_zero(stats->packet_count))); | |
1321 | put_32aligned_be64(&asr->byte_count, | |
1322 | htonll(unknown_to_zero(stats->byte_count))); | |
76c93b22 BP |
1323 | asr->flow_count = htonl(stats->flow_count); |
1324 | } else if (request->type == htons(OFPST_VENDOR)) { | |
1325 | struct nx_aggregate_stats_reply *nasr; | |
1326 | ||
1327 | nasr = ofputil_make_stats_reply(sizeof *nasr, request, &msg); | |
1328 | assert(nasr->nsm.subtype == htonl(NXST_AGGREGATE)); | |
1329 | nasr->packet_count = htonll(stats->packet_count); | |
1330 | nasr->byte_count = htonll(stats->byte_count); | |
1331 | nasr->flow_count = htonl(stats->flow_count); | |
1332 | } else { | |
1333 | NOT_REACHED(); | |
1334 | } | |
1335 | ||
1336 | return msg; | |
1337 | } | |
1338 | ||
b78f6b77 BP |
1339 | /* Converts an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message 'oh' into an |
1340 | * abstract ofputil_flow_removed in 'fr'. Returns 0 if successful, otherwise | |
1341 | * an OpenFlow error code. */ | |
9b045a0c BP |
1342 | int |
1343 | ofputil_decode_flow_removed(struct ofputil_flow_removed *fr, | |
b78f6b77 | 1344 | const struct ofp_header *oh) |
9b045a0c BP |
1345 | { |
1346 | const struct ofputil_msg_type *type; | |
1347 | enum ofputil_msg_code code; | |
1348 | ||
1349 | ofputil_decode_msg_type(oh, &type); | |
1350 | code = ofputil_msg_type_code(type); | |
1351 | if (code == OFPUTIL_OFPT_FLOW_REMOVED) { | |
1352 | const struct ofp_flow_removed *ofr; | |
1353 | ||
1354 | ofr = (const struct ofp_flow_removed *) oh; | |
1355 | ofputil_cls_rule_from_match(&ofr->match, ntohs(ofr->priority), | |
b78f6b77 | 1356 | &fr->rule); |
9b045a0c BP |
1357 | fr->cookie = ofr->cookie; |
1358 | fr->reason = ofr->reason; | |
1359 | fr->duration_sec = ntohl(ofr->duration_sec); | |
1360 | fr->duration_nsec = ntohl(ofr->duration_nsec); | |
1361 | fr->idle_timeout = ntohs(ofr->idle_timeout); | |
1362 | fr->packet_count = ntohll(ofr->packet_count); | |
1363 | fr->byte_count = ntohll(ofr->byte_count); | |
1364 | } else if (code == OFPUTIL_NXT_FLOW_REMOVED) { | |
1365 | struct nx_flow_removed *nfr; | |
1366 | struct ofpbuf b; | |
1367 | int error; | |
1368 | ||
1369 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); | |
1370 | ||
1371 | nfr = ofpbuf_pull(&b, sizeof *nfr); | |
1372 | error = nx_pull_match(&b, ntohs(nfr->match_len), ntohs(nfr->priority), | |
1373 | &fr->rule); | |
1374 | if (error) { | |
1375 | return error; | |
1376 | } | |
1377 | if (b.size) { | |
1378 | return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN); | |
1379 | } | |
1380 | ||
1381 | fr->cookie = nfr->cookie; | |
1382 | fr->reason = nfr->reason; | |
1383 | fr->duration_sec = ntohl(nfr->duration_sec); | |
1384 | fr->duration_nsec = ntohl(nfr->duration_nsec); | |
1385 | fr->idle_timeout = ntohs(nfr->idle_timeout); | |
1386 | fr->packet_count = ntohll(nfr->packet_count); | |
1387 | fr->byte_count = ntohll(nfr->byte_count); | |
1388 | } else { | |
1389 | NOT_REACHED(); | |
1390 | } | |
1391 | ||
1392 | return 0; | |
1393 | } | |
1394 | ||
588cd7b5 BP |
1395 | /* Converts abstract ofputil_flow_removed 'fr' into an OFPT_FLOW_REMOVED or |
1396 | * NXT_FLOW_REMOVED message 'oh' according to 'flow_format', and returns the | |
1397 | * message. */ | |
1398 | struct ofpbuf * | |
1399 | ofputil_encode_flow_removed(const struct ofputil_flow_removed *fr, | |
1400 | enum nx_flow_format flow_format) | |
1401 | { | |
1402 | struct ofpbuf *msg; | |
1403 | ||
b78f6b77 | 1404 | if (flow_format == NXFF_OPENFLOW10) { |
588cd7b5 BP |
1405 | struct ofp_flow_removed *ofr; |
1406 | ||
1407 | ofr = make_openflow_xid(sizeof *ofr, OFPT_FLOW_REMOVED, htonl(0), | |
1408 | &msg); | |
b78f6b77 | 1409 | ofputil_cls_rule_to_match(&fr->rule, &ofr->match); |
7fb563b9 | 1410 | ofr->cookie = fr->cookie; |
588cd7b5 BP |
1411 | ofr->priority = htons(fr->rule.priority); |
1412 | ofr->reason = fr->reason; | |
1413 | ofr->duration_sec = htonl(fr->duration_sec); | |
1414 | ofr->duration_nsec = htonl(fr->duration_nsec); | |
1415 | ofr->idle_timeout = htons(fr->idle_timeout); | |
5e9d0469 BP |
1416 | ofr->packet_count = htonll(unknown_to_zero(fr->packet_count)); |
1417 | ofr->byte_count = htonll(unknown_to_zero(fr->byte_count)); | |
588cd7b5 BP |
1418 | } else if (flow_format == NXFF_NXM) { |
1419 | struct nx_flow_removed *nfr; | |
1420 | int match_len; | |
1421 | ||
1422 | make_nxmsg_xid(sizeof *nfr, NXT_FLOW_REMOVED, htonl(0), &msg); | |
1423 | match_len = nx_put_match(msg, &fr->rule); | |
1424 | ||
1425 | nfr = msg->data; | |
1426 | nfr->cookie = fr->cookie; | |
1427 | nfr->priority = htons(fr->rule.priority); | |
1428 | nfr->reason = fr->reason; | |
1429 | nfr->duration_sec = htonl(fr->duration_sec); | |
1430 | nfr->duration_nsec = htonl(fr->duration_nsec); | |
1431 | nfr->idle_timeout = htons(fr->idle_timeout); | |
1432 | nfr->match_len = htons(match_len); | |
1433 | nfr->packet_count = htonll(fr->packet_count); | |
1434 | nfr->byte_count = htonll(fr->byte_count); | |
1435 | } else { | |
1436 | NOT_REACHED(); | |
1437 | } | |
1438 | ||
1439 | return msg; | |
1440 | } | |
1441 | ||
ebb57021 BP |
1442 | /* Converts abstract ofputil_packet_in 'pin' into an OFPT_PACKET_IN message |
1443 | * and returns the message. | |
1444 | * | |
1445 | * If 'rw_packet' is NULL, the caller takes ownership of the newly allocated | |
1446 | * returned ofpbuf. | |
1447 | * | |
1448 | * If 'rw_packet' is nonnull, then it must contain the same data as | |
1449 | * pin->packet. 'rw_packet' is allowed to be the same ofpbuf as pin->packet. | |
1450 | * It is modified in-place into an OFPT_PACKET_IN message according to 'pin', | |
1451 | * and then ofputil_encode_packet_in() returns 'rw_packet'. If 'rw_packet' has | |
1452 | * enough headroom to insert a "struct ofp_packet_in", this is more efficient | |
1453 | * than ofputil_encode_packet_in() because it does not copy the packet | |
1454 | * payload. */ | |
1455 | struct ofpbuf * | |
1456 | ofputil_encode_packet_in(const struct ofputil_packet_in *pin, | |
1457 | struct ofpbuf *rw_packet) | |
1458 | { | |
1459 | int total_len = pin->packet->size; | |
62698c77 | 1460 | struct ofp_packet_in opi; |
ebb57021 BP |
1461 | |
1462 | if (rw_packet) { | |
1463 | if (pin->send_len < rw_packet->size) { | |
1464 | rw_packet->size = pin->send_len; | |
1465 | } | |
1466 | } else { | |
1467 | rw_packet = ofpbuf_clone_data_with_headroom( | |
1468 | pin->packet->data, MIN(pin->send_len, pin->packet->size), | |
1469 | offsetof(struct ofp_packet_in, data)); | |
1470 | } | |
1471 | ||
1472 | /* Add OFPT_PACKET_IN. */ | |
62698c77 BP |
1473 | memset(&opi, 0, sizeof opi); |
1474 | opi.header.version = OFP_VERSION; | |
1475 | opi.header.type = OFPT_PACKET_IN; | |
1476 | opi.total_len = htons(total_len); | |
1477 | opi.in_port = htons(pin->in_port); | |
1478 | opi.reason = pin->reason; | |
1479 | opi.buffer_id = htonl(pin->buffer_id); | |
1480 | ofpbuf_push(rw_packet, &opi, offsetof(struct ofp_packet_in, data)); | |
ebb57021 BP |
1481 | update_openflow_length(rw_packet); |
1482 | ||
1483 | return rw_packet; | |
1484 | } | |
1485 | ||
d1e2cf21 BP |
1486 | /* Returns a string representing the message type of 'type'. The string is the |
1487 | * enumeration constant for the type, e.g. "OFPT_HELLO". For statistics | |
1488 | * messages, the constant is followed by "request" or "reply", | |
1489 | * e.g. "OFPST_AGGREGATE reply". */ | |
1490 | const char * | |
1491 | ofputil_msg_type_name(const struct ofputil_msg_type *type) | |
1492 | { | |
1493 | return type->name; | |
1494 | } | |
1495 | \f | |
fa37b408 BP |
1496 | /* Allocates and stores in '*bufferp' a new ofpbuf with a size of |
1497 | * 'openflow_len', starting with an OpenFlow header with the given 'type' and | |
1498 | * an arbitrary transaction id. Allocated bytes beyond the header, if any, are | |
1499 | * zeroed. | |
1500 | * | |
1501 | * The caller is responsible for freeing '*bufferp' when it is no longer | |
1502 | * needed. | |
1503 | * | |
1504 | * The OpenFlow header length is initially set to 'openflow_len'; if the | |
1505 | * message is later extended, the length should be updated with | |
1506 | * update_openflow_length() before sending. | |
1507 | * | |
1508 | * Returns the header. */ | |
1509 | void * | |
1510 | make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **bufferp) | |
1511 | { | |
1512 | *bufferp = ofpbuf_new(openflow_len); | |
1513 | return put_openflow_xid(openflow_len, type, alloc_xid(), *bufferp); | |
1514 | } | |
1515 | ||
0bd0c660 BP |
1516 | /* Similar to make_openflow() but creates a Nicira vendor extension message |
1517 | * with the specific 'subtype'. 'subtype' should be in host byte order. */ | |
1518 | void * | |
1519 | make_nxmsg(size_t openflow_len, uint32_t subtype, struct ofpbuf **bufferp) | |
1520 | { | |
1521 | return make_nxmsg_xid(openflow_len, subtype, alloc_xid(), bufferp); | |
1522 | } | |
1523 | ||
fa37b408 BP |
1524 | /* Allocates and stores in '*bufferp' a new ofpbuf with a size of |
1525 | * 'openflow_len', starting with an OpenFlow header with the given 'type' and | |
1526 | * transaction id 'xid'. Allocated bytes beyond the header, if any, are | |
1527 | * zeroed. | |
1528 | * | |
1529 | * The caller is responsible for freeing '*bufferp' when it is no longer | |
1530 | * needed. | |
1531 | * | |
1532 | * The OpenFlow header length is initially set to 'openflow_len'; if the | |
1533 | * message is later extended, the length should be updated with | |
1534 | * update_openflow_length() before sending. | |
1535 | * | |
1536 | * Returns the header. */ | |
1537 | void * | |
44381c1b | 1538 | make_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid, |
fa37b408 BP |
1539 | struct ofpbuf **bufferp) |
1540 | { | |
1541 | *bufferp = ofpbuf_new(openflow_len); | |
1542 | return put_openflow_xid(openflow_len, type, xid, *bufferp); | |
1543 | } | |
1544 | ||
0bd0c660 BP |
1545 | /* Similar to make_openflow_xid() but creates a Nicira vendor extension message |
1546 | * with the specific 'subtype'. 'subtype' should be in host byte order. */ | |
1547 | void * | |
44381c1b | 1548 | make_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid, |
0bd0c660 BP |
1549 | struct ofpbuf **bufferp) |
1550 | { | |
dfdfc8d4 BP |
1551 | *bufferp = ofpbuf_new(openflow_len); |
1552 | return put_nxmsg_xid(openflow_len, subtype, xid, *bufferp); | |
0bd0c660 BP |
1553 | } |
1554 | ||
fa37b408 BP |
1555 | /* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header |
1556 | * with the given 'type' and an arbitrary transaction id. Allocated bytes | |
1557 | * beyond the header, if any, are zeroed. | |
1558 | * | |
1559 | * The OpenFlow header length is initially set to 'openflow_len'; if the | |
1560 | * message is later extended, the length should be updated with | |
1561 | * update_openflow_length() before sending. | |
1562 | * | |
1563 | * Returns the header. */ | |
1564 | void * | |
1565 | put_openflow(size_t openflow_len, uint8_t type, struct ofpbuf *buffer) | |
1566 | { | |
1567 | return put_openflow_xid(openflow_len, type, alloc_xid(), buffer); | |
1568 | } | |
1569 | ||
1570 | /* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header | |
1571 | * with the given 'type' and an transaction id 'xid'. Allocated bytes beyond | |
1572 | * the header, if any, are zeroed. | |
1573 | * | |
1574 | * The OpenFlow header length is initially set to 'openflow_len'; if the | |
1575 | * message is later extended, the length should be updated with | |
1576 | * update_openflow_length() before sending. | |
1577 | * | |
1578 | * Returns the header. */ | |
1579 | void * | |
44381c1b | 1580 | put_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid, |
fa37b408 BP |
1581 | struct ofpbuf *buffer) |
1582 | { | |
1583 | struct ofp_header *oh; | |
1584 | ||
1585 | assert(openflow_len >= sizeof *oh); | |
1586 | assert(openflow_len <= UINT16_MAX); | |
1587 | ||
1588 | oh = ofpbuf_put_uninit(buffer, openflow_len); | |
1589 | oh->version = OFP_VERSION; | |
1590 | oh->type = type; | |
1591 | oh->length = htons(openflow_len); | |
1592 | oh->xid = xid; | |
1593 | memset(oh + 1, 0, openflow_len - sizeof *oh); | |
1594 | return oh; | |
1595 | } | |
1596 | ||
dfdfc8d4 BP |
1597 | /* Similar to put_openflow() but append a Nicira vendor extension message with |
1598 | * the specific 'subtype'. 'subtype' should be in host byte order. */ | |
1599 | void * | |
1600 | put_nxmsg(size_t openflow_len, uint32_t subtype, struct ofpbuf *buffer) | |
1601 | { | |
1602 | return put_nxmsg_xid(openflow_len, subtype, alloc_xid(), buffer); | |
1603 | } | |
1604 | ||
1605 | /* Similar to put_openflow_xid() but append a Nicira vendor extension message | |
1606 | * with the specific 'subtype'. 'subtype' should be in host byte order. */ | |
1607 | void * | |
1608 | put_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid, | |
1609 | struct ofpbuf *buffer) | |
1610 | { | |
1611 | struct nicira_header *nxh; | |
1612 | ||
1613 | nxh = put_openflow_xid(openflow_len, OFPT_VENDOR, xid, buffer); | |
1614 | nxh->vendor = htonl(NX_VENDOR_ID); | |
1615 | nxh->subtype = htonl(subtype); | |
1616 | return nxh; | |
1617 | } | |
1618 | ||
fa37b408 BP |
1619 | /* Updates the 'length' field of the OpenFlow message in 'buffer' to |
1620 | * 'buffer->size'. */ | |
1621 | void | |
d295e8e9 | 1622 | update_openflow_length(struct ofpbuf *buffer) |
fa37b408 BP |
1623 | { |
1624 | struct ofp_header *oh = ofpbuf_at_assert(buffer, 0, sizeof *oh); | |
d295e8e9 | 1625 | oh->length = htons(buffer->size); |
fa37b408 BP |
1626 | } |
1627 | ||
63f2140a BP |
1628 | static void |
1629 | put_stats__(ovs_be32 xid, uint8_t ofp_type, | |
1630 | ovs_be16 ofpst_type, ovs_be32 nxst_subtype, | |
1631 | struct ofpbuf *msg) | |
1632 | { | |
1633 | if (ofpst_type == htons(OFPST_VENDOR)) { | |
1634 | struct nicira_stats_msg *nsm; | |
1635 | ||
1636 | nsm = put_openflow_xid(sizeof *nsm, ofp_type, xid, msg); | |
1637 | nsm->vsm.osm.type = ofpst_type; | |
1638 | nsm->vsm.vendor = htonl(NX_VENDOR_ID); | |
1639 | nsm->subtype = nxst_subtype; | |
1640 | } else { | |
1641 | struct ofp_stats_msg *osm; | |
1642 | ||
1643 | osm = put_openflow_xid(sizeof *osm, ofp_type, xid, msg); | |
1644 | osm->type = ofpst_type; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | /* Creates a statistics request message with total length 'openflow_len' | |
1649 | * (including all headers) and the given 'ofpst_type', and stores the buffer | |
1650 | * containing the new message in '*bufferp'. If 'ofpst_type' is OFPST_VENDOR | |
1651 | * then 'nxst_subtype' is used as the Nicira vendor extension statistics | |
1652 | * subtype (otherwise 'nxst_subtype' is ignored). | |
1653 | * | |
1654 | * Initializes bytes following the headers to all-bits-zero. | |
1655 | * | |
1656 | * Returns the first byte of the new message. */ | |
dfdfc8d4 | 1657 | void * |
63f2140a BP |
1658 | ofputil_make_stats_request(size_t openflow_len, uint16_t ofpst_type, |
1659 | uint32_t nxst_subtype, struct ofpbuf **bufferp) | |
dfdfc8d4 | 1660 | { |
63f2140a BP |
1661 | struct ofpbuf *msg; |
1662 | ||
1663 | msg = *bufferp = ofpbuf_new(openflow_len); | |
1664 | put_stats__(alloc_xid(), OFPT_STATS_REQUEST, | |
1665 | htons(ofpst_type), htonl(nxst_subtype), msg); | |
1666 | ofpbuf_padto(msg, openflow_len); | |
1667 | ||
1668 | return msg->data; | |
1669 | } | |
1670 | ||
1671 | static void | |
1672 | put_stats_reply__(const struct ofp_stats_msg *request, struct ofpbuf *msg) | |
1673 | { | |
1674 | assert(request->header.type == OFPT_STATS_REQUEST || | |
1675 | request->header.type == OFPT_STATS_REPLY); | |
1676 | put_stats__(request->header.xid, OFPT_STATS_REPLY, request->type, | |
1677 | (request->type != htons(OFPST_VENDOR) | |
1678 | ? htonl(0) | |
1679 | : ((const struct nicira_stats_msg *) request)->subtype), | |
1680 | msg); | |
1681 | } | |
1682 | ||
1683 | /* Creates a statistics reply message with total length 'openflow_len' | |
1684 | * (including all headers) and the same type (either a standard OpenFlow | |
1685 | * statistics type or a Nicira extension type and subtype) as 'request', and | |
1686 | * stores the buffer containing the new message in '*bufferp'. | |
1687 | * | |
1688 | * Initializes bytes following the headers to all-bits-zero. | |
1689 | * | |
1690 | * Returns the first byte of the new message. */ | |
1691 | void * | |
1692 | ofputil_make_stats_reply(size_t openflow_len, | |
1693 | const struct ofp_stats_msg *request, | |
1694 | struct ofpbuf **bufferp) | |
1695 | { | |
1696 | struct ofpbuf *msg; | |
1697 | ||
1698 | msg = *bufferp = ofpbuf_new(openflow_len); | |
1699 | put_stats_reply__(request, msg); | |
1700 | ofpbuf_padto(msg, openflow_len); | |
1701 | ||
1702 | return msg->data; | |
1703 | } | |
1704 | ||
1705 | /* Initializes 'replies' as a list of ofpbufs that will contain a series of | |
1706 | * replies to 'request', which should be an OpenFlow or Nicira extension | |
1707 | * statistics request. Initially 'replies' will have a single reply message | |
1708 | * that has only a header. The functions ofputil_reserve_stats_reply() and | |
1709 | * ofputil_append_stats_reply() may be used to add to the reply. */ | |
1710 | void | |
1711 | ofputil_start_stats_reply(const struct ofp_stats_msg *request, | |
1712 | struct list *replies) | |
1713 | { | |
1714 | struct ofpbuf *msg; | |
1715 | ||
1716 | msg = ofpbuf_new(1024); | |
1717 | put_stats_reply__(request, msg); | |
1718 | ||
1719 | list_init(replies); | |
1720 | list_push_back(replies, &msg->list_node); | |
1721 | } | |
1722 | ||
1723 | /* Prepares to append up to 'len' bytes to the series of statistics replies in | |
1724 | * 'replies', which should have been initialized with | |
1725 | * ofputil_start_stats_reply(). Returns an ofpbuf with at least 'len' bytes of | |
1726 | * tailroom. (The 'len' bytes have not actually be allocated; the caller must | |
1727 | * do so with e.g. ofpbuf_put_uninit().) */ | |
1728 | struct ofpbuf * | |
1729 | ofputil_reserve_stats_reply(size_t len, struct list *replies) | |
1730 | { | |
1731 | struct ofpbuf *msg = ofpbuf_from_list(list_back(replies)); | |
1732 | struct ofp_stats_msg *osm = msg->data; | |
1733 | ||
1734 | if (msg->size + len <= UINT16_MAX) { | |
1735 | ofpbuf_prealloc_tailroom(msg, len); | |
1736 | } else { | |
1737 | osm->flags |= htons(OFPSF_REPLY_MORE); | |
1738 | ||
1739 | msg = ofpbuf_new(MAX(1024, sizeof(struct nicira_stats_msg) + len)); | |
1740 | put_stats_reply__(osm, msg); | |
1741 | list_push_back(replies, &msg->list_node); | |
1742 | } | |
1743 | return msg; | |
dfdfc8d4 BP |
1744 | } |
1745 | ||
63f2140a BP |
1746 | /* Appends 'len' bytes to the series of statistics replies in 'replies', and |
1747 | * returns the first byte. */ | |
dfdfc8d4 | 1748 | void * |
63f2140a | 1749 | ofputil_append_stats_reply(size_t len, struct list *replies) |
dfdfc8d4 | 1750 | { |
63f2140a | 1751 | return ofpbuf_put_uninit(ofputil_reserve_stats_reply(len, replies), len); |
dfdfc8d4 BP |
1752 | } |
1753 | ||
03cd3493 | 1754 | /* Returns the first byte past the ofp_stats_msg header in 'oh'. */ |
d1e2cf21 BP |
1755 | const void * |
1756 | ofputil_stats_body(const struct ofp_header *oh) | |
1757 | { | |
1758 | assert(oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY); | |
28c8bad1 | 1759 | return (const struct ofp_stats_msg *) oh + 1; |
d1e2cf21 BP |
1760 | } |
1761 | ||
03cd3493 | 1762 | /* Returns the number of bytes past the ofp_stats_msg header in 'oh'. */ |
d1e2cf21 BP |
1763 | size_t |
1764 | ofputil_stats_body_len(const struct ofp_header *oh) | |
1765 | { | |
1766 | assert(oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY); | |
28c8bad1 | 1767 | return ntohs(oh->length) - sizeof(struct ofp_stats_msg); |
d1e2cf21 BP |
1768 | } |
1769 | ||
03cd3493 | 1770 | /* Returns the first byte past the nicira_stats_msg header in 'oh'. */ |
c6430da5 BP |
1771 | const void * |
1772 | ofputil_nxstats_body(const struct ofp_header *oh) | |
1773 | { | |
1774 | assert(oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY); | |
1775 | return ((const struct nicira_stats_msg *) oh) + 1; | |
1776 | } | |
1777 | ||
03cd3493 | 1778 | /* Returns the number of bytes past the nicira_stats_msg header in 'oh'. */ |
c6430da5 BP |
1779 | size_t |
1780 | ofputil_nxstats_body_len(const struct ofp_header *oh) | |
1781 | { | |
1782 | assert(oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY); | |
1783 | return ntohs(oh->length) - sizeof(struct nicira_stats_msg); | |
1784 | } | |
1785 | ||
fa37b408 | 1786 | struct ofpbuf * |
daa68e9f BP |
1787 | make_flow_mod(uint16_t command, const struct cls_rule *rule, |
1788 | size_t actions_len) | |
fa37b408 BP |
1789 | { |
1790 | struct ofp_flow_mod *ofm; | |
1791 | size_t size = sizeof *ofm + actions_len; | |
1792 | struct ofpbuf *out = ofpbuf_new(size); | |
1793 | ofm = ofpbuf_put_zeros(out, sizeof *ofm); | |
1794 | ofm->header.version = OFP_VERSION; | |
1795 | ofm->header.type = OFPT_FLOW_MOD; | |
1796 | ofm->header.length = htons(size); | |
1797 | ofm->cookie = 0; | |
daa68e9f | 1798 | ofm->priority = htons(MIN(rule->priority, UINT16_MAX)); |
b78f6b77 | 1799 | ofputil_cls_rule_to_match(rule, &ofm->match); |
fa37b408 BP |
1800 | ofm->command = htons(command); |
1801 | return out; | |
1802 | } | |
1803 | ||
1804 | struct ofpbuf * | |
daa68e9f | 1805 | make_add_flow(const struct cls_rule *rule, uint32_t buffer_id, |
fa37b408 BP |
1806 | uint16_t idle_timeout, size_t actions_len) |
1807 | { | |
daa68e9f | 1808 | struct ofpbuf *out = make_flow_mod(OFPFC_ADD, rule, actions_len); |
fa37b408 BP |
1809 | struct ofp_flow_mod *ofm = out->data; |
1810 | ofm->idle_timeout = htons(idle_timeout); | |
1811 | ofm->hard_timeout = htons(OFP_FLOW_PERMANENT); | |
1812 | ofm->buffer_id = htonl(buffer_id); | |
1813 | return out; | |
1814 | } | |
1815 | ||
1816 | struct ofpbuf * | |
daa68e9f | 1817 | make_del_flow(const struct cls_rule *rule) |
fa37b408 | 1818 | { |
daa68e9f | 1819 | struct ofpbuf *out = make_flow_mod(OFPFC_DELETE_STRICT, rule, 0); |
fa37b408 BP |
1820 | struct ofp_flow_mod *ofm = out->data; |
1821 | ofm->out_port = htons(OFPP_NONE); | |
1822 | return out; | |
1823 | } | |
1824 | ||
1825 | struct ofpbuf * | |
daa68e9f | 1826 | make_add_simple_flow(const struct cls_rule *rule, |
fa37b408 BP |
1827 | uint32_t buffer_id, uint16_t out_port, |
1828 | uint16_t idle_timeout) | |
1829 | { | |
81f3cad4 BP |
1830 | if (out_port != OFPP_NONE) { |
1831 | struct ofp_action_output *oao; | |
1832 | struct ofpbuf *buffer; | |
1833 | ||
daa68e9f | 1834 | buffer = make_add_flow(rule, buffer_id, idle_timeout, sizeof *oao); |
93996add | 1835 | ofputil_put_OFPAT_OUTPUT(buffer)->port = htons(out_port); |
81f3cad4 BP |
1836 | return buffer; |
1837 | } else { | |
daa68e9f | 1838 | return make_add_flow(rule, buffer_id, idle_timeout, 0); |
81f3cad4 | 1839 | } |
fa37b408 BP |
1840 | } |
1841 | ||
1842 | struct ofpbuf * | |
1843 | make_packet_in(uint32_t buffer_id, uint16_t in_port, uint8_t reason, | |
1844 | const struct ofpbuf *payload, int max_send_len) | |
1845 | { | |
1846 | struct ofp_packet_in *opi; | |
1847 | struct ofpbuf *buf; | |
1848 | int send_len; | |
1849 | ||
1850 | send_len = MIN(max_send_len, payload->size); | |
1851 | buf = ofpbuf_new(sizeof *opi + send_len); | |
1852 | opi = put_openflow_xid(offsetof(struct ofp_packet_in, data), | |
1853 | OFPT_PACKET_IN, 0, buf); | |
1854 | opi->buffer_id = htonl(buffer_id); | |
1855 | opi->total_len = htons(payload->size); | |
1856 | opi->in_port = htons(in_port); | |
1857 | opi->reason = reason; | |
1858 | ofpbuf_put(buf, payload->data, send_len); | |
1859 | update_openflow_length(buf); | |
1860 | ||
1861 | return buf; | |
1862 | } | |
1863 | ||
1864 | struct ofpbuf * | |
1865 | make_packet_out(const struct ofpbuf *packet, uint32_t buffer_id, | |
1866 | uint16_t in_port, | |
1867 | const struct ofp_action_header *actions, size_t n_actions) | |
1868 | { | |
1869 | size_t actions_len = n_actions * sizeof *actions; | |
1870 | struct ofp_packet_out *opo; | |
1871 | size_t size = sizeof *opo + actions_len + (packet ? packet->size : 0); | |
1872 | struct ofpbuf *out = ofpbuf_new(size); | |
1873 | ||
1874 | opo = ofpbuf_put_uninit(out, sizeof *opo); | |
1875 | opo->header.version = OFP_VERSION; | |
1876 | opo->header.type = OFPT_PACKET_OUT; | |
1877 | opo->header.length = htons(size); | |
1878 | opo->header.xid = htonl(0); | |
1879 | opo->buffer_id = htonl(buffer_id); | |
6c24d402 | 1880 | opo->in_port = htons(in_port); |
fa37b408 BP |
1881 | opo->actions_len = htons(actions_len); |
1882 | ofpbuf_put(out, actions, actions_len); | |
1883 | if (packet) { | |
1884 | ofpbuf_put(out, packet->data, packet->size); | |
1885 | } | |
1886 | return out; | |
1887 | } | |
1888 | ||
1889 | struct ofpbuf * | |
1890 | make_unbuffered_packet_out(const struct ofpbuf *packet, | |
1891 | uint16_t in_port, uint16_t out_port) | |
1892 | { | |
1893 | struct ofp_action_output action; | |
1894 | action.type = htons(OFPAT_OUTPUT); | |
1895 | action.len = htons(sizeof action); | |
1896 | action.port = htons(out_port); | |
1897 | return make_packet_out(packet, UINT32_MAX, in_port, | |
1898 | (struct ofp_action_header *) &action, 1); | |
1899 | } | |
1900 | ||
1901 | struct ofpbuf * | |
1902 | make_buffered_packet_out(uint32_t buffer_id, | |
1903 | uint16_t in_port, uint16_t out_port) | |
1904 | { | |
81f3cad4 BP |
1905 | if (out_port != OFPP_NONE) { |
1906 | struct ofp_action_output action; | |
1907 | action.type = htons(OFPAT_OUTPUT); | |
1908 | action.len = htons(sizeof action); | |
1909 | action.port = htons(out_port); | |
1910 | return make_packet_out(NULL, buffer_id, in_port, | |
1911 | (struct ofp_action_header *) &action, 1); | |
1912 | } else { | |
1913 | return make_packet_out(NULL, buffer_id, in_port, NULL, 0); | |
1914 | } | |
fa37b408 BP |
1915 | } |
1916 | ||
1917 | /* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */ | |
1918 | struct ofpbuf * | |
1919 | make_echo_request(void) | |
1920 | { | |
1921 | struct ofp_header *rq; | |
1922 | struct ofpbuf *out = ofpbuf_new(sizeof *rq); | |
1923 | rq = ofpbuf_put_uninit(out, sizeof *rq); | |
1924 | rq->version = OFP_VERSION; | |
1925 | rq->type = OFPT_ECHO_REQUEST; | |
1926 | rq->length = htons(sizeof *rq); | |
44381c1b | 1927 | rq->xid = htonl(0); |
fa37b408 BP |
1928 | return out; |
1929 | } | |
1930 | ||
1931 | /* Creates and returns an OFPT_ECHO_REPLY message matching the | |
1932 | * OFPT_ECHO_REQUEST message in 'rq'. */ | |
1933 | struct ofpbuf * | |
1934 | make_echo_reply(const struct ofp_header *rq) | |
1935 | { | |
1936 | size_t size = ntohs(rq->length); | |
1937 | struct ofpbuf *out = ofpbuf_new(size); | |
1938 | struct ofp_header *reply = ofpbuf_put(out, rq, size); | |
1939 | reply->type = OFPT_ECHO_REPLY; | |
1940 | return out; | |
1941 | } | |
1942 | ||
7257b535 BP |
1943 | const char * |
1944 | ofputil_frag_handling_to_string(enum ofp_config_flags flags) | |
1945 | { | |
1946 | switch (flags & OFPC_FRAG_MASK) { | |
1947 | case OFPC_FRAG_NORMAL: return "normal"; | |
1948 | case OFPC_FRAG_DROP: return "drop"; | |
1949 | case OFPC_FRAG_REASM: return "reassemble"; | |
1950 | case OFPC_FRAG_NX_MATCH: return "nx-match"; | |
1951 | } | |
1952 | ||
1953 | NOT_REACHED(); | |
1954 | } | |
1955 | ||
1956 | bool | |
1957 | ofputil_frag_handling_from_string(const char *s, enum ofp_config_flags *flags) | |
1958 | { | |
1959 | if (!strcasecmp(s, "normal")) { | |
1960 | *flags = OFPC_FRAG_NORMAL; | |
1961 | } else if (!strcasecmp(s, "drop")) { | |
1962 | *flags = OFPC_FRAG_DROP; | |
1963 | } else if (!strcasecmp(s, "reassemble")) { | |
1964 | *flags = OFPC_FRAG_REASM; | |
1965 | } else if (!strcasecmp(s, "nx-match")) { | |
1966 | *flags = OFPC_FRAG_NX_MATCH; | |
1967 | } else { | |
1968 | return false; | |
1969 | } | |
1970 | return true; | |
1971 | } | |
1972 | ||
c1c9c9c4 BP |
1973 | /* Checks that 'port' is a valid output port for the OFPAT_OUTPUT action, given |
1974 | * that the switch will never have more than 'max_ports' ports. Returns 0 if | |
1975 | * 'port' is valid, otherwise an ofp_mkerr() return code. */ | |
77410139 EJ |
1976 | int |
1977 | ofputil_check_output_port(uint16_t port, int max_ports) | |
fa37b408 BP |
1978 | { |
1979 | switch (port) { | |
1980 | case OFPP_IN_PORT: | |
1981 | case OFPP_TABLE: | |
1982 | case OFPP_NORMAL: | |
1983 | case OFPP_FLOOD: | |
1984 | case OFPP_ALL: | |
1985 | case OFPP_CONTROLLER: | |
1986 | case OFPP_LOCAL: | |
1987 | return 0; | |
1988 | ||
1989 | default: | |
c1c9c9c4 | 1990 | if (port < max_ports) { |
fa37b408 BP |
1991 | return 0; |
1992 | } | |
fa37b408 BP |
1993 | return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT); |
1994 | } | |
1995 | } | |
1996 | ||
39dc9082 BP |
1997 | #define OFPUTIL_NAMED_PORTS \ |
1998 | OFPUTIL_NAMED_PORT(IN_PORT) \ | |
1999 | OFPUTIL_NAMED_PORT(TABLE) \ | |
2000 | OFPUTIL_NAMED_PORT(NORMAL) \ | |
2001 | OFPUTIL_NAMED_PORT(FLOOD) \ | |
2002 | OFPUTIL_NAMED_PORT(ALL) \ | |
2003 | OFPUTIL_NAMED_PORT(CONTROLLER) \ | |
2004 | OFPUTIL_NAMED_PORT(LOCAL) \ | |
2005 | OFPUTIL_NAMED_PORT(NONE) | |
2006 | ||
2007 | /* Checks whether 's' is the string representation of an OpenFlow port number, | |
2008 | * either as an integer or a string name (e.g. "LOCAL"). If it is, stores the | |
2009 | * number in '*port' and returns true. Otherwise, returns false. */ | |
2010 | bool | |
2011 | ofputil_port_from_string(const char *name, uint16_t *port) | |
2012 | { | |
2013 | struct pair { | |
2014 | const char *name; | |
2015 | uint16_t value; | |
2016 | }; | |
2017 | static const struct pair pairs[] = { | |
2018 | #define OFPUTIL_NAMED_PORT(NAME) {#NAME, OFPP_##NAME}, | |
2019 | OFPUTIL_NAMED_PORTS | |
2020 | #undef OFPUTIL_NAMED_PORT | |
2021 | }; | |
2022 | static const int n_pairs = ARRAY_SIZE(pairs); | |
2023 | int i; | |
2024 | ||
2025 | if (str_to_int(name, 0, &i) && i >= 0 && i < UINT16_MAX) { | |
2026 | *port = i; | |
2027 | return true; | |
2028 | } | |
2029 | ||
2030 | for (i = 0; i < n_pairs; i++) { | |
2031 | if (!strcasecmp(name, pairs[i].name)) { | |
2032 | *port = pairs[i].value; | |
2033 | return true; | |
2034 | } | |
2035 | } | |
2036 | return false; | |
2037 | } | |
2038 | ||
2039 | /* Appends to 's' a string representation of the OpenFlow port number 'port'. | |
2040 | * Most ports' string representation is just the port number, but for special | |
2041 | * ports, e.g. OFPP_LOCAL, it is the name, e.g. "LOCAL". */ | |
2042 | void | |
2043 | ofputil_format_port(uint16_t port, struct ds *s) | |
2044 | { | |
2045 | const char *name; | |
2046 | ||
2047 | switch (port) { | |
2048 | #define OFPUTIL_NAMED_PORT(NAME) case OFPP_##NAME: name = #NAME; break; | |
2049 | OFPUTIL_NAMED_PORTS | |
2050 | #undef OFPUTIL_NAMED_PORT | |
2051 | ||
2052 | default: | |
2053 | ds_put_format(s, "%"PRIu16, port); | |
2054 | return; | |
2055 | } | |
2056 | ds_put_cstr(s, name); | |
2057 | } | |
2058 | ||
29901626 BP |
2059 | static int |
2060 | check_resubmit_table(const struct nx_action_resubmit *nar) | |
2061 | { | |
2062 | if (nar->pad[0] || nar->pad[1] || nar->pad[2]) { | |
2063 | return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT); | |
2064 | } | |
2065 | return 0; | |
2066 | } | |
2067 | ||
f694937d EJ |
2068 | static int |
2069 | check_output_reg(const struct nx_action_output_reg *naor, | |
2070 | const struct flow *flow) | |
2071 | { | |
2072 | size_t i; | |
2073 | ||
2074 | for (i = 0; i < sizeof naor->zero; i++) { | |
2075 | if (naor->zero[i]) { | |
2076 | return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT); | |
2077 | } | |
2078 | } | |
2079 | ||
2080 | return nxm_src_check(naor->src, nxm_decode_ofs(naor->ofs_nbits), | |
2081 | nxm_decode_n_bits(naor->ofs_nbits), flow); | |
2082 | } | |
2083 | ||
38f2e360 BP |
2084 | int |
2085 | validate_actions(const union ofp_action *actions, size_t n_actions, | |
2086 | const struct flow *flow, int max_ports) | |
c1c9c9c4 | 2087 | { |
38f2e360 BP |
2088 | const union ofp_action *a; |
2089 | size_t left; | |
c1c9c9c4 | 2090 | |
38f2e360 BP |
2091 | OFPUTIL_ACTION_FOR_EACH (a, left, actions, n_actions) { |
2092 | uint16_t port; | |
2093 | int error; | |
2094 | int code; | |
c1c9c9c4 | 2095 | |
38f2e360 BP |
2096 | code = ofputil_decode_action(a); |
2097 | if (code < 0) { | |
2098 | char *msg; | |
c1c9c9c4 | 2099 | |
38f2e360 BP |
2100 | error = -code; |
2101 | msg = ofputil_error_to_string(error); | |
2102 | VLOG_WARN_RL(&bad_ofmsg_rl, | |
2103 | "action decoding error at offset %td (%s)", | |
2104 | (a - actions) * sizeof *a, msg); | |
2105 | free(msg); | |
fa37b408 | 2106 | |
38f2e360 BP |
2107 | return error; |
2108 | } | |
fa37b408 | 2109 | |
38f2e360 BP |
2110 | error = 0; |
2111 | switch ((enum ofputil_action_code) code) { | |
2112 | case OFPUTIL_OFPAT_OUTPUT: | |
77410139 EJ |
2113 | error = ofputil_check_output_port(ntohs(a->output.port), |
2114 | max_ports); | |
38f2e360 | 2115 | break; |
e41a9130 | 2116 | |
38f2e360 BP |
2117 | case OFPUTIL_OFPAT_SET_VLAN_VID: |
2118 | if (a->vlan_vid.vlan_vid & ~htons(0xfff)) { | |
2119 | error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT); | |
2120 | } | |
2121 | break; | |
96fc46e8 | 2122 | |
38f2e360 BP |
2123 | case OFPUTIL_OFPAT_SET_VLAN_PCP: |
2124 | if (a->vlan_pcp.vlan_pcp & ~7) { | |
2125 | error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT); | |
2126 | } | |
2127 | break; | |
96fc46e8 | 2128 | |
38f2e360 BP |
2129 | case OFPUTIL_OFPAT_ENQUEUE: |
2130 | port = ntohs(((const struct ofp_action_enqueue *) a)->port); | |
2131 | if (port >= max_ports && port != OFPP_IN_PORT) { | |
2132 | error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT); | |
2133 | } | |
2134 | break; | |
96fc46e8 | 2135 | |
38f2e360 BP |
2136 | case OFPUTIL_NXAST_REG_MOVE: |
2137 | error = nxm_check_reg_move((const struct nx_action_reg_move *) a, | |
2138 | flow); | |
2139 | break; | |
96fc46e8 | 2140 | |
38f2e360 BP |
2141 | case OFPUTIL_NXAST_REG_LOAD: |
2142 | error = nxm_check_reg_load((const struct nx_action_reg_load *) a, | |
2143 | flow); | |
2144 | break; | |
b9298d3f | 2145 | |
38f2e360 | 2146 | case OFPUTIL_NXAST_MULTIPATH: |
43edca57 EJ |
2147 | error = multipath_check((const struct nx_action_multipath *) a, |
2148 | flow); | |
38f2e360 BP |
2149 | break; |
2150 | ||
2151 | case OFPUTIL_NXAST_AUTOPATH: | |
43edca57 EJ |
2152 | error = autopath_check((const struct nx_action_autopath *) a, |
2153 | flow); | |
38f2e360 BP |
2154 | break; |
2155 | ||
daff3353 | 2156 | case OFPUTIL_NXAST_BUNDLE: |
a368bb53 | 2157 | case OFPUTIL_NXAST_BUNDLE_LOAD: |
daff3353 | 2158 | error = bundle_check((const struct nx_action_bundle *) a, |
a368bb53 | 2159 | max_ports, flow); |
daff3353 EJ |
2160 | break; |
2161 | ||
f694937d EJ |
2162 | case OFPUTIL_NXAST_OUTPUT_REG: |
2163 | error = check_output_reg((const struct nx_action_output_reg *) a, | |
2164 | flow); | |
2165 | break; | |
2166 | ||
29901626 BP |
2167 | case OFPUTIL_NXAST_RESUBMIT_TABLE: |
2168 | error = check_resubmit_table( | |
2169 | (const struct nx_action_resubmit *) a); | |
2170 | break; | |
2171 | ||
75a75043 BP |
2172 | case OFPUTIL_NXAST_LEARN: |
2173 | error = learn_check((const struct nx_action_learn *) a, flow); | |
2174 | break; | |
2175 | ||
38f2e360 BP |
2176 | case OFPUTIL_OFPAT_STRIP_VLAN: |
2177 | case OFPUTIL_OFPAT_SET_NW_SRC: | |
2178 | case OFPUTIL_OFPAT_SET_NW_DST: | |
2179 | case OFPUTIL_OFPAT_SET_NW_TOS: | |
2180 | case OFPUTIL_OFPAT_SET_TP_SRC: | |
2181 | case OFPUTIL_OFPAT_SET_TP_DST: | |
2182 | case OFPUTIL_OFPAT_SET_DL_SRC: | |
2183 | case OFPUTIL_OFPAT_SET_DL_DST: | |
2184 | case OFPUTIL_NXAST_RESUBMIT: | |
2185 | case OFPUTIL_NXAST_SET_TUNNEL: | |
2186 | case OFPUTIL_NXAST_SET_QUEUE: | |
2187 | case OFPUTIL_NXAST_POP_QUEUE: | |
2188 | case OFPUTIL_NXAST_NOTE: | |
2189 | case OFPUTIL_NXAST_SET_TUNNEL64: | |
848e8809 | 2190 | case OFPUTIL_NXAST_EXIT: |
38f2e360 | 2191 | break; |
53ddd40a | 2192 | } |
53ddd40a | 2193 | |
3b6a2571 | 2194 | if (error) { |
38f2e360 BP |
2195 | char *msg = ofputil_error_to_string(error); |
2196 | VLOG_WARN_RL(&bad_ofmsg_rl, "bad action at offset %td (%s)", | |
2197 | (a - actions) * sizeof *a, msg); | |
2198 | free(msg); | |
3b6a2571 EJ |
2199 | return error; |
2200 | } | |
fa37b408 | 2201 | } |
38f2e360 BP |
2202 | if (left) { |
2203 | VLOG_WARN_RL(&bad_ofmsg_rl, "bad action format at offset %zu", | |
2204 | (n_actions - left) * sizeof *a); | |
2205 | return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN); | |
2206 | } | |
2207 | return 0; | |
fa37b408 BP |
2208 | } |
2209 | ||
51cb6e0c BP |
2210 | struct ofputil_action { |
2211 | int code; | |
38f2e360 BP |
2212 | unsigned int min_len; |
2213 | unsigned int max_len; | |
2214 | }; | |
27bcf966 | 2215 | |
51cb6e0c BP |
2216 | static const struct ofputil_action action_bad_type |
2217 | = { -OFP_MKERR(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE), 0, UINT_MAX }; | |
2218 | static const struct ofputil_action action_bad_len | |
2219 | = { -OFP_MKERR(OFPET_BAD_ACTION, OFPBAC_BAD_LEN), 0, UINT_MAX }; | |
2220 | static const struct ofputil_action action_bad_vendor | |
2221 | = { -OFP_MKERR(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR), 0, UINT_MAX }; | |
27bcf966 | 2222 | |
51cb6e0c | 2223 | static const struct ofputil_action * |
38f2e360 BP |
2224 | ofputil_decode_ofpat_action(const union ofp_action *a) |
2225 | { | |
51cb6e0c | 2226 | enum ofp_action_type type = ntohs(a->type); |
fa37b408 | 2227 | |
51cb6e0c | 2228 | switch (type) { |
e23ae585 | 2229 | #define OFPAT_ACTION(ENUM, STRUCT, NAME) \ |
51cb6e0c BP |
2230 | case ENUM: { \ |
2231 | static const struct ofputil_action action = { \ | |
e23ae585 BP |
2232 | OFPUTIL_##ENUM, \ |
2233 | sizeof(struct STRUCT), \ | |
2234 | sizeof(struct STRUCT) \ | |
51cb6e0c BP |
2235 | }; \ |
2236 | return &action; \ | |
2237 | } | |
e23ae585 | 2238 | #include "ofp-util.def" |
51cb6e0c BP |
2239 | |
2240 | case OFPAT_VENDOR: | |
2241 | default: | |
2242 | return &action_bad_type; | |
38f2e360 BP |
2243 | } |
2244 | } | |
fa37b408 | 2245 | |
51cb6e0c | 2246 | static const struct ofputil_action * |
38f2e360 BP |
2247 | ofputil_decode_nxast_action(const union ofp_action *a) |
2248 | { | |
51cb6e0c BP |
2249 | const struct nx_action_header *nah = (const struct nx_action_header *) a; |
2250 | enum nx_action_subtype subtype = ntohs(nah->subtype); | |
2251 | ||
2252 | switch (subtype) { | |
e23ae585 BP |
2253 | #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \ |
2254 | case ENUM: { \ | |
2255 | static const struct ofputil_action action = { \ | |
2256 | OFPUTIL_##ENUM, \ | |
2257 | sizeof(struct STRUCT), \ | |
2258 | EXTENSIBLE ? UINT_MAX : sizeof(struct STRUCT) \ | |
2259 | }; \ | |
2260 | return &action; \ | |
38f2e360 | 2261 | } |
e23ae585 | 2262 | #include "ofp-util.def" |
51cb6e0c BP |
2263 | |
2264 | case NXAST_SNAT__OBSOLETE: | |
2265 | case NXAST_DROP_SPOOFED_ARP__OBSOLETE: | |
2266 | default: | |
2267 | return &action_bad_type; | |
fa37b408 BP |
2268 | } |
2269 | } | |
2270 | ||
38f2e360 BP |
2271 | /* Parses 'a' to determine its type. Returns a nonnegative OFPUTIL_OFPAT_* or |
2272 | * OFPUTIL_NXAST_* constant if successful, otherwise a negative OpenFlow error | |
2273 | * code (as returned by ofp_mkerr()). | |
2274 | * | |
2275 | * The caller must have already verified that 'a''s length is correct (that is, | |
2276 | * a->header.len is nonzero and a multiple of sizeof(union ofp_action) and no | |
2277 | * longer than the amount of space allocated to 'a'). | |
2278 | * | |
2279 | * This function verifies that 'a''s length is correct for the type of action | |
2280 | * that it represents. */ | |
fa37b408 | 2281 | int |
38f2e360 | 2282 | ofputil_decode_action(const union ofp_action *a) |
fa37b408 | 2283 | { |
51cb6e0c BP |
2284 | const struct ofputil_action *action; |
2285 | uint16_t len = ntohs(a->header.len); | |
2286 | ||
38f2e360 | 2287 | if (a->type != htons(OFPAT_VENDOR)) { |
51cb6e0c | 2288 | action = ofputil_decode_ofpat_action(a); |
38f2e360 | 2289 | } else { |
51cb6e0c BP |
2290 | switch (ntohl(a->vendor.vendor)) { |
2291 | case NX_VENDOR_ID: | |
2292 | if (len < sizeof(struct nx_action_header)) { | |
2293 | return -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN); | |
2294 | } | |
2295 | action = ofputil_decode_nxast_action(a); | |
2296 | break; | |
2297 | default: | |
2298 | action = &action_bad_vendor; | |
2299 | break; | |
2300 | } | |
38f2e360 | 2301 | } |
51cb6e0c BP |
2302 | |
2303 | return (len >= action->min_len && len <= action->max_len | |
2304 | ? action->code | |
2305 | : -ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN)); | |
38f2e360 | 2306 | } |
fa37b408 | 2307 | |
38f2e360 BP |
2308 | /* Parses 'a' and returns its type as an OFPUTIL_OFPAT_* or OFPUTIL_NXAST_* |
2309 | * constant. The caller must have already validated that 'a' is a valid action | |
2310 | * understood by Open vSwitch (e.g. by a previous successful call to | |
2311 | * ofputil_decode_action()). */ | |
2312 | enum ofputil_action_code | |
2313 | ofputil_decode_action_unsafe(const union ofp_action *a) | |
2314 | { | |
51cb6e0c BP |
2315 | const struct ofputil_action *action; |
2316 | ||
38f2e360 | 2317 | if (a->type != htons(OFPAT_VENDOR)) { |
51cb6e0c | 2318 | action = ofputil_decode_ofpat_action(a); |
38f2e360 | 2319 | } else { |
51cb6e0c | 2320 | action = ofputil_decode_nxast_action(a); |
fa37b408 | 2321 | } |
51cb6e0c BP |
2322 | |
2323 | return action->code; | |
fa37b408 BP |
2324 | } |
2325 | ||
e23ae585 BP |
2326 | /* Returns the 'enum ofputil_action_code' corresponding to 'name' (e.g. if |
2327 | * 'name' is "output" then the return value is OFPUTIL_OFPAT_OUTPUT), or -1 if | |
2328 | * 'name' is not the name of any action. | |
2329 | * | |
2330 | * ofp-util.def lists the mapping from names to action. */ | |
2331 | int | |
2332 | ofputil_action_code_from_name(const char *name) | |
2333 | { | |
2334 | static const char *names[OFPUTIL_N_ACTIONS] = { | |
2335 | #define OFPAT_ACTION(ENUM, STRUCT, NAME) NAME, | |
2336 | #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) NAME, | |
2337 | #include "ofp-util.def" | |
2338 | }; | |
2339 | ||
2340 | const char **p; | |
2341 | ||
2342 | for (p = names; p < &names[ARRAY_SIZE(names)]; p++) { | |
2343 | if (*p && !strcasecmp(name, *p)) { | |
2344 | return p - names; | |
2345 | } | |
2346 | } | |
2347 | return -1; | |
2348 | } | |
2349 | ||
93996add BP |
2350 | /* Appends an action of the type specified by 'code' to 'buf' and returns the |
2351 | * action. Initializes the parts of 'action' that identify it as having type | |
2352 | * <ENUM> and length 'sizeof *action' and zeros the rest. For actions that | |
2353 | * have variable length, the length used and cleared is that of struct | |
2354 | * <STRUCT>. */ | |
2355 | void * | |
2356 | ofputil_put_action(enum ofputil_action_code code, struct ofpbuf *buf) | |
2357 | { | |
2358 | switch (code) { | |
2359 | #define OFPAT_ACTION(ENUM, STRUCT, NAME) \ | |
2360 | case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf); | |
2361 | #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \ | |
2362 | case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf); | |
2363 | #include "ofp-util.def" | |
2364 | } | |
2365 | NOT_REACHED(); | |
2366 | } | |
2367 | ||
2368 | #define OFPAT_ACTION(ENUM, STRUCT, NAME) \ | |
2369 | void \ | |
2370 | ofputil_init_##ENUM(struct STRUCT *s) \ | |
2371 | { \ | |
2372 | memset(s, 0, sizeof *s); \ | |
2373 | s->type = htons(ENUM); \ | |
2374 | s->len = htons(sizeof *s); \ | |
2375 | } \ | |
2376 | \ | |
2377 | struct STRUCT * \ | |
2378 | ofputil_put_##ENUM(struct ofpbuf *buf) \ | |
2379 | { \ | |
2380 | struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \ | |
2381 | ofputil_init_##ENUM(s); \ | |
2382 | return s; \ | |
2383 | } | |
2384 | #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \ | |
2385 | void \ | |
2386 | ofputil_init_##ENUM(struct STRUCT *s) \ | |
2387 | { \ | |
2388 | memset(s, 0, sizeof *s); \ | |
2389 | s->type = htons(OFPAT_VENDOR); \ | |
2390 | s->len = htons(sizeof *s); \ | |
2391 | s->vendor = htonl(NX_VENDOR_ID); \ | |
2392 | s->subtype = htons(ENUM); \ | |
2393 | } \ | |
2394 | \ | |
2395 | struct STRUCT * \ | |
2396 | ofputil_put_##ENUM(struct ofpbuf *buf) \ | |
2397 | { \ | |
2398 | struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \ | |
2399 | ofputil_init_##ENUM(s); \ | |
2400 | return s; \ | |
2401 | } | |
2402 | #include "ofp-util.def" | |
2403 | ||
dbba996b | 2404 | /* Returns true if 'action' outputs to 'port', false otherwise. */ |
c1c9c9c4 | 2405 | bool |
dbba996b | 2406 | action_outputs_to_port(const union ofp_action *action, ovs_be16 port) |
c1c9c9c4 BP |
2407 | { |
2408 | switch (ntohs(action->type)) { | |
2409 | case OFPAT_OUTPUT: | |
2410 | return action->output.port == port; | |
2411 | case OFPAT_ENQUEUE: | |
2412 | return ((const struct ofp_action_enqueue *) action)->port == port; | |
2413 | default: | |
2414 | return false; | |
2415 | } | |
2416 | } | |
2417 | ||
b459a924 BP |
2418 | /* "Normalizes" the wildcards in 'rule'. That means: |
2419 | * | |
2420 | * 1. If the type of level N is known, then only the valid fields for that | |
2421 | * level may be specified. For example, ARP does not have a TOS field, | |
2422 | * so nw_tos must be wildcarded if 'rule' specifies an ARP flow. | |
2423 | * Similarly, IPv4 does not have any IPv6 addresses, so ipv6_src and | |
2424 | * ipv6_dst (and other fields) must be wildcarded if 'rule' specifies an | |
2425 | * IPv4 flow. | |
2426 | * | |
2427 | * 2. If the type of level N is not known (or not understood by Open | |
2428 | * vSwitch), then no fields at all for that level may be specified. For | |
2429 | * example, Open vSwitch does not understand SCTP, an L4 protocol, so the | |
2430 | * L4 fields tp_src and tp_dst must be wildcarded if 'rule' specifies an | |
2431 | * SCTP flow. | |
2432 | * | |
2433 | * 'flow_format' specifies the format of the flow as received or as intended to | |
2434 | * be sent. This is important for IPv6 and ARP, for which NXM supports more | |
2435 | * detailed matching. */ | |
2436 | void | |
2437 | ofputil_normalize_rule(struct cls_rule *rule, enum nx_flow_format flow_format) | |
2438 | { | |
2439 | enum { | |
2440 | MAY_NW_ADDR = 1 << 0, /* nw_src, nw_dst */ | |
2441 | MAY_TP_ADDR = 1 << 1, /* tp_src, tp_dst */ | |
2442 | MAY_NW_PROTO = 1 << 2, /* nw_proto */ | |
7257b535 | 2443 | MAY_TOS_FRAG = 1 << 3, /* tos_frag */ |
b459a924 BP |
2444 | MAY_ARP_SHA = 1 << 4, /* arp_sha */ |
2445 | MAY_ARP_THA = 1 << 5, /* arp_tha */ | |
2446 | MAY_IPV6_ADDR = 1 << 6, /* ipv6_src, ipv6_dst */ | |
2447 | MAY_ND_TARGET = 1 << 7 /* nd_target */ | |
2448 | } may_match; | |
2449 | ||
2450 | struct flow_wildcards wc; | |
2451 | ||
2452 | /* Figure out what fields may be matched. */ | |
2453 | if (rule->flow.dl_type == htons(ETH_TYPE_IP)) { | |
7257b535 | 2454 | may_match = MAY_NW_PROTO | MAY_TOS_FRAG | MAY_NW_ADDR; |
b459a924 BP |
2455 | if (rule->flow.nw_proto == IPPROTO_TCP || |
2456 | rule->flow.nw_proto == IPPROTO_UDP || | |
2457 | rule->flow.nw_proto == IPPROTO_ICMP) { | |
2458 | may_match |= MAY_TP_ADDR; | |
2459 | } | |
2460 | } else if (rule->flow.dl_type == htons(ETH_TYPE_IPV6) | |
2461 | && flow_format == NXFF_NXM) { | |
7257b535 | 2462 | may_match = MAY_NW_PROTO | MAY_TOS_FRAG | MAY_IPV6_ADDR; |
b459a924 BP |
2463 | if (rule->flow.nw_proto == IPPROTO_TCP || |
2464 | rule->flow.nw_proto == IPPROTO_UDP) { | |
2465 | may_match |= MAY_TP_ADDR; | |
2466 | } else if (rule->flow.nw_proto == IPPROTO_ICMPV6) { | |
2467 | may_match |= MAY_TP_ADDR; | |
2468 | if (rule->flow.tp_src == htons(ND_NEIGHBOR_SOLICIT)) { | |
2469 | may_match |= MAY_ND_TARGET | MAY_ARP_SHA; | |
2470 | } else if (rule->flow.tp_src == htons(ND_NEIGHBOR_ADVERT)) { | |
2471 | may_match |= MAY_ND_TARGET | MAY_ARP_THA; | |
2472 | } | |
2473 | } | |
2474 | } else if (rule->flow.dl_type == htons(ETH_TYPE_ARP)) { | |
2475 | may_match = MAY_NW_PROTO | MAY_NW_ADDR; | |
2476 | if (flow_format == NXFF_NXM) { | |
2477 | may_match |= MAY_ARP_SHA | MAY_ARP_THA; | |
fa37b408 | 2478 | } |
1c0b7503 | 2479 | } else { |
b459a924 BP |
2480 | may_match = 0; |
2481 | } | |
2482 | ||
2483 | /* Clear the fields that may not be matched. */ | |
2484 | wc = rule->wc; | |
2485 | if (!(may_match & MAY_NW_ADDR)) { | |
2486 | wc.nw_src_mask = wc.nw_dst_mask = htonl(0); | |
2487 | } | |
2488 | if (!(may_match & MAY_TP_ADDR)) { | |
2489 | wc.wildcards |= FWW_TP_SRC | FWW_TP_DST; | |
2490 | } | |
2491 | if (!(may_match & MAY_NW_PROTO)) { | |
2492 | wc.wildcards |= FWW_NW_PROTO; | |
2493 | } | |
7257b535 BP |
2494 | if (!(may_match & MAY_TOS_FRAG)) { |
2495 | wc.tos_frag_mask = 0; | |
b459a924 BP |
2496 | } |
2497 | if (!(may_match & MAY_ARP_SHA)) { | |
2498 | wc.wildcards |= FWW_ARP_SHA; | |
2499 | } | |
2500 | if (!(may_match & MAY_ARP_THA)) { | |
2501 | wc.wildcards |= FWW_ARP_THA; | |
2502 | } | |
2503 | if (!(may_match & MAY_IPV6_ADDR)) { | |
2504 | wc.ipv6_src_mask = wc.ipv6_dst_mask = in6addr_any; | |
2505 | } | |
2506 | if (!(may_match & MAY_ND_TARGET)) { | |
2507 | wc.wildcards |= FWW_ND_TARGET; | |
2508 | } | |
2509 | ||
2510 | /* Log any changes. */ | |
2511 | if (!flow_wildcards_equal(&wc, &rule->wc)) { | |
2512 | bool log = !VLOG_DROP_INFO(&bad_ofmsg_rl); | |
2513 | char *pre = log ? cls_rule_to_string(rule) : NULL; | |
2514 | ||
2515 | rule->wc = wc; | |
2516 | cls_rule_zero_wildcarded_fields(rule); | |
2517 | ||
2518 | if (log) { | |
2519 | char *post = cls_rule_to_string(rule); | |
2520 | VLOG_INFO("normalization changed ofp_match, details:"); | |
2521 | VLOG_INFO(" pre: %s", pre); | |
2522 | VLOG_INFO("post: %s", post); | |
2523 | free(pre); | |
2524 | free(post); | |
2525 | } | |
fa37b408 | 2526 | } |
3f09c339 | 2527 | } |
26c112c2 BP |
2528 | |
2529 | static uint32_t | |
2530 | vendor_code_to_id(uint8_t code) | |
2531 | { | |
2532 | switch (code) { | |
2533 | #define OFPUTIL_VENDOR(NAME, VENDOR_ID) case NAME: return VENDOR_ID; | |
3a75cda9 BP |
2534 | OFPUTIL_VENDORS |
2535 | #undef OFPUTIL_VENDOR | |
26c112c2 BP |
2536 | default: |
2537 | return UINT32_MAX; | |
2538 | } | |
2539 | } | |
2540 | ||
dc4762ed BP |
2541 | static int |
2542 | vendor_id_to_code(uint32_t id) | |
2543 | { | |
2544 | switch (id) { | |
2545 | #define OFPUTIL_VENDOR(NAME, VENDOR_ID) case VENDOR_ID: return NAME; | |
2546 | OFPUTIL_VENDORS | |
2547 | #undef OFPUTIL_VENDOR | |
2548 | default: | |
2549 | return -1; | |
2550 | } | |
2551 | } | |
2552 | ||
26c112c2 BP |
2553 | /* Creates and returns an OpenFlow message of type OFPT_ERROR with the error |
2554 | * information taken from 'error', whose encoding must be as described in the | |
2555 | * large comment in ofp-util.h. If 'oh' is nonnull, then the error will use | |
2556 | * oh->xid as its transaction ID, and it will include up to the first 64 bytes | |
2557 | * of 'oh'. | |
2558 | * | |
2559 | * Returns NULL if 'error' is not an OpenFlow error code. */ | |
2560 | struct ofpbuf * | |
dc4762ed | 2561 | ofputil_encode_error_msg(int error, const struct ofp_header *oh) |
26c112c2 BP |
2562 | { |
2563 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
2564 | ||
2565 | struct ofpbuf *buf; | |
2566 | const void *data; | |
2567 | size_t len; | |
2568 | uint8_t vendor; | |
2569 | uint16_t type; | |
2570 | uint16_t code; | |
44381c1b | 2571 | ovs_be32 xid; |
26c112c2 BP |
2572 | |
2573 | if (!is_ofp_error(error)) { | |
2574 | /* We format 'error' with strerror() here since it seems likely to be | |
2575 | * a system errno value. */ | |
2576 | VLOG_WARN_RL(&rl, "invalid OpenFlow error code %d (%s)", | |
2577 | error, strerror(error)); | |
2578 | return NULL; | |
2579 | } | |
2580 | ||
2581 | if (oh) { | |
2582 | xid = oh->xid; | |
2583 | data = oh; | |
2584 | len = ntohs(oh->length); | |
2585 | if (len > 64) { | |
2586 | len = 64; | |
2587 | } | |
2588 | } else { | |
2589 | xid = 0; | |
2590 | data = NULL; | |
2591 | len = 0; | |
2592 | } | |
2593 | ||
2594 | vendor = get_ofp_err_vendor(error); | |
2595 | type = get_ofp_err_type(error); | |
2596 | code = get_ofp_err_code(error); | |
2597 | if (vendor == OFPUTIL_VENDOR_OPENFLOW) { | |
2598 | struct ofp_error_msg *oem; | |
2599 | ||
2600 | oem = make_openflow_xid(len + sizeof *oem, OFPT_ERROR, xid, &buf); | |
2601 | oem->type = htons(type); | |
2602 | oem->code = htons(code); | |
2603 | } else { | |
2604 | struct ofp_error_msg *oem; | |
217f48c6 | 2605 | struct nx_vendor_error *nve; |
26c112c2 BP |
2606 | uint32_t vendor_id; |
2607 | ||
2608 | vendor_id = vendor_code_to_id(vendor); | |
2609 | if (vendor_id == UINT32_MAX) { | |
2610 | VLOG_WARN_RL(&rl, "error %x contains invalid vendor code %d", | |
2611 | error, vendor); | |
2612 | return NULL; | |
2613 | } | |
2614 | ||
217f48c6 | 2615 | oem = make_openflow_xid(len + sizeof *oem + sizeof *nve, |
26c112c2 BP |
2616 | OFPT_ERROR, xid, &buf); |
2617 | oem->type = htons(NXET_VENDOR); | |
2618 | oem->code = htons(NXVC_VENDOR_ERROR); | |
2619 | ||
17764fb2 | 2620 | nve = (struct nx_vendor_error *)oem->data; |
217f48c6 BP |
2621 | nve->vendor = htonl(vendor_id); |
2622 | nve->type = htons(type); | |
2623 | nve->code = htons(code); | |
26c112c2 BP |
2624 | } |
2625 | ||
2626 | if (len) { | |
59edb09c | 2627 | buf->size -= len; |
26c112c2 BP |
2628 | ofpbuf_put(buf, data, len); |
2629 | } | |
2630 | ||
2631 | return buf; | |
2632 | } | |
3052b0c5 | 2633 | |
dc4762ed BP |
2634 | /* Decodes 'oh', which should be an OpenFlow OFPT_ERROR message, and returns an |
2635 | * Open vSwitch internal error code in the format described in the large | |
2636 | * comment in ofp-util.h. | |
2637 | * | |
2638 | * If 'payload_ofs' is nonnull, on success '*payload_ofs' is set to the offset | |
2639 | * to the payload starting from 'oh' and on failure it is set to 0. */ | |
2640 | int | |
2641 | ofputil_decode_error_msg(const struct ofp_header *oh, size_t *payload_ofs) | |
2642 | { | |
2643 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
2644 | ||
2645 | const struct ofp_error_msg *oem; | |
2646 | uint16_t type, code; | |
2647 | struct ofpbuf b; | |
2648 | int vendor; | |
2649 | ||
2650 | if (payload_ofs) { | |
2651 | *payload_ofs = 0; | |
2652 | } | |
2653 | if (oh->type != OFPT_ERROR) { | |
2654 | return EPROTO; | |
2655 | } | |
2656 | ||
2657 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); | |
2658 | oem = ofpbuf_try_pull(&b, sizeof *oem); | |
2659 | if (!oem) { | |
2660 | return EPROTO; | |
2661 | } | |
2662 | ||
2663 | type = ntohs(oem->type); | |
2664 | code = ntohs(oem->code); | |
2665 | if (type == NXET_VENDOR && code == NXVC_VENDOR_ERROR) { | |
2666 | const struct nx_vendor_error *nve = ofpbuf_try_pull(&b, sizeof *nve); | |
2667 | if (!nve) { | |
2668 | return EPROTO; | |
2669 | } | |
2670 | ||
2671 | vendor = vendor_id_to_code(ntohl(nve->vendor)); | |
2672 | if (vendor < 0) { | |
2673 | VLOG_WARN_RL(&rl, "error contains unknown vendor ID %#"PRIx32, | |
2674 | ntohl(nve->vendor)); | |
2675 | return EPROTO; | |
2676 | } | |
2677 | type = ntohs(nve->type); | |
2678 | code = ntohs(nve->code); | |
2679 | } else { | |
2680 | vendor = OFPUTIL_VENDOR_OPENFLOW; | |
2681 | } | |
2682 | ||
2683 | if (type >= 1024) { | |
2684 | VLOG_WARN_RL(&rl, "error contains type %"PRIu16" greater than " | |
2685 | "supported maximum value 1023", type); | |
2686 | return EPROTO; | |
2687 | } | |
2688 | ||
2689 | if (payload_ofs) { | |
2690 | *payload_ofs = (uint8_t *) b.data - (uint8_t *) oh; | |
2691 | } | |
2692 | return ofp_mkerr_vendor(vendor, type, code); | |
2693 | } | |
2694 | ||
2695 | void | |
2696 | ofputil_format_error(struct ds *s, int error) | |
2697 | { | |
2698 | if (is_errno(error)) { | |
2699 | ds_put_cstr(s, strerror(error)); | |
2700 | } else { | |
2701 | uint16_t type = get_ofp_err_type(error); | |
2702 | uint16_t code = get_ofp_err_code(error); | |
2703 | const char *type_s = ofp_error_type_to_string(type); | |
2704 | const char *code_s = ofp_error_code_to_string(type, code); | |
2705 | ||
2706 | ds_put_format(s, "type "); | |
2707 | if (type_s) { | |
2708 | ds_put_cstr(s, type_s); | |
2709 | } else { | |
2710 | ds_put_format(s, "%"PRIu16, type); | |
2711 | } | |
2712 | ||
2713 | ds_put_cstr(s, ", code "); | |
2714 | if (code_s) { | |
2715 | ds_put_cstr(s, code_s); | |
2716 | } else { | |
2717 | ds_put_format(s, "%"PRIu16, code); | |
2718 | } | |
2719 | } | |
2720 | } | |
2721 | ||
2722 | char * | |
2723 | ofputil_error_to_string(int error) | |
2724 | { | |
2725 | struct ds s = DS_EMPTY_INITIALIZER; | |
2726 | ofputil_format_error(&s, error); | |
2727 | return ds_steal_cstr(&s); | |
2728 | } | |
2729 | ||
3052b0c5 BP |
2730 | /* Attempts to pull 'actions_len' bytes from the front of 'b'. Returns 0 if |
2731 | * successful, otherwise an OpenFlow error. | |
2732 | * | |
2733 | * If successful, the first action is stored in '*actionsp' and the number of | |
2734 | * "union ofp_action" size elements into '*n_actionsp'. Otherwise NULL and 0 | |
2735 | * are stored, respectively. | |
2736 | * | |
2737 | * This function does not check that the actions are valid (the caller should | |
2738 | * do so, with validate_actions()). The caller is also responsible for making | |
2739 | * sure that 'b->data' is initially aligned appropriately for "union | |
2740 | * ofp_action". */ | |
2741 | int | |
2742 | ofputil_pull_actions(struct ofpbuf *b, unsigned int actions_len, | |
2743 | union ofp_action **actionsp, size_t *n_actionsp) | |
2744 | { | |
69b6be19 | 2745 | if (actions_len % OFP_ACTION_ALIGN != 0) { |
f4350529 BP |
2746 | VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u " |
2747 | "is not a multiple of %d", actions_len, OFP_ACTION_ALIGN); | |
3052b0c5 BP |
2748 | goto error; |
2749 | } | |
2750 | ||
2751 | *actionsp = ofpbuf_try_pull(b, actions_len); | |
2752 | if (*actionsp == NULL) { | |
f4350529 BP |
2753 | VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u " |
2754 | "exceeds remaining message length (%zu)", | |
2755 | actions_len, b->size); | |
3052b0c5 BP |
2756 | goto error; |
2757 | } | |
2758 | ||
69b6be19 | 2759 | *n_actionsp = actions_len / OFP_ACTION_ALIGN; |
3052b0c5 BP |
2760 | return 0; |
2761 | ||
2762 | error: | |
2763 | *actionsp = NULL; | |
2764 | *n_actionsp = 0; | |
2765 | return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN); | |
2766 | } | |
18ddadc2 BP |
2767 | |
2768 | bool | |
2769 | ofputil_actions_equal(const union ofp_action *a, size_t n_a, | |
2770 | const union ofp_action *b, size_t n_b) | |
2771 | { | |
2772 | return n_a == n_b && (!n_a || !memcmp(a, b, n_a * sizeof *a)); | |
2773 | } | |
2774 | ||
2775 | union ofp_action * | |
2776 | ofputil_actions_clone(const union ofp_action *actions, size_t n) | |
2777 | { | |
2778 | return n ? xmemdup(actions, n * sizeof *actions) : NULL; | |
2779 | } | |
0ff22822 BP |
2780 | |
2781 | /* Parses a key or a key-value pair from '*stringp'. | |
2782 | * | |
2783 | * On success: Stores the key into '*keyp'. Stores the value, if present, into | |
2784 | * '*valuep', otherwise an empty string. Advances '*stringp' past the end of | |
2785 | * the key-value pair, preparing it for another call. '*keyp' and '*valuep' | |
2786 | * are substrings of '*stringp' created by replacing some of its bytes by null | |
2787 | * terminators. Returns true. | |
2788 | * | |
2789 | * If '*stringp' is just white space or commas, sets '*keyp' and '*valuep' to | |
2790 | * NULL and returns false. */ | |
2791 | bool | |
2792 | ofputil_parse_key_value(char **stringp, char **keyp, char **valuep) | |
2793 | { | |
2794 | char *pos, *key, *value; | |
2795 | size_t key_len; | |
2796 | ||
2797 | pos = *stringp; | |
2798 | pos += strspn(pos, ", \t\r\n"); | |
2799 | if (*pos == '\0') { | |
2800 | *keyp = *valuep = NULL; | |
2801 | return false; | |
2802 | } | |
2803 | ||
2804 | key = pos; | |
2805 | key_len = strcspn(pos, ":=(, \t\r\n"); | |
2806 | if (key[key_len] == ':' || key[key_len] == '=') { | |
2807 | /* The value can be separated by a colon. */ | |
2808 | size_t value_len; | |
2809 | ||
2810 | value = key + key_len + 1; | |
2811 | value_len = strcspn(value, ", \t\r\n"); | |
2812 | pos = value + value_len + (value[value_len] != '\0'); | |
2813 | value[value_len] = '\0'; | |
2814 | } else if (key[key_len] == '(') { | |
2815 | /* The value can be surrounded by balanced parentheses. The outermost | |
2816 | * set of parentheses is removed. */ | |
2817 | int level = 1; | |
2818 | size_t value_len; | |
2819 | ||
2820 | value = key + key_len + 1; | |
2821 | for (value_len = 0; level > 0; value_len++) { | |
2822 | switch (value[value_len]) { | |
2823 | case '\0': | |
2824 | ovs_fatal(0, "unbalanced parentheses in argument to %s", key); | |
2825 | ||
2826 | case '(': | |
2827 | level++; | |
2828 | break; | |
2829 | ||
2830 | case ')': | |
2831 | level--; | |
2832 | break; | |
2833 | } | |
2834 | } | |
2835 | value[value_len - 1] = '\0'; | |
2836 | pos = value + value_len; | |
2837 | } else { | |
2838 | /* There might be no value at all. */ | |
2839 | value = key + key_len; /* Will become the empty string below. */ | |
2840 | pos = key + key_len + (key[key_len] != '\0'); | |
2841 | } | |
2842 | key[key_len] = '\0'; | |
2843 | ||
2844 | *stringp = pos; | |
2845 | *keyp = key; | |
2846 | *valuep = value; | |
2847 | return true; | |
2848 | } |