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fa37b408 | 1 | /* |
73dbf4ab | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012 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" |
816fd533 | 32 | #include "meta-flow.h" |
b6c9e612 | 33 | #include "nx-match.h" |
dc4762ed | 34 | #include "ofp-errors.h" |
fa37b408 BP |
35 | #include "ofp-util.h" |
36 | #include "ofpbuf.h" | |
37 | #include "packets.h" | |
38 | #include "random.h" | |
4ffd1b43 | 39 | #include "unaligned.h" |
e41a9130 | 40 | #include "type-props.h" |
5136ce49 | 41 | #include "vlog.h" |
fa37b408 | 42 | |
d98e6007 | 43 | VLOG_DEFINE_THIS_MODULE(ofp_util); |
fa37b408 BP |
44 | |
45 | /* Rate limit for OpenFlow message parse errors. These always indicate a bug | |
46 | * in the peer and so there's not much point in showing a lot of them. */ | |
47 | static struct vlog_rate_limit bad_ofmsg_rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
48 | ||
0596e897 BP |
49 | /* Given the wildcard bit count in the least-significant 6 of 'wcbits', returns |
50 | * an IP netmask with a 1 in each bit that must match and a 0 in each bit that | |
51 | * is wildcarded. | |
52 | * | |
53 | * The bits in 'wcbits' are in the format used in enum ofp_flow_wildcards: 0 | |
54 | * is exact match, 1 ignores the LSB, 2 ignores the 2 least-significant bits, | |
55 | * ..., 32 and higher wildcard the entire field. This is the *opposite* of the | |
56 | * usual convention where e.g. /24 indicates that 8 bits (not 24 bits) are | |
57 | * wildcarded. */ | |
58 | ovs_be32 | |
59 | ofputil_wcbits_to_netmask(int wcbits) | |
60 | { | |
61 | wcbits &= 0x3f; | |
62 | return wcbits < 32 ? htonl(~((1u << wcbits) - 1)) : 0; | |
63 | } | |
64 | ||
65 | /* Given the IP netmask 'netmask', returns the number of bits of the IP address | |
aad29cd1 BP |
66 | * that it wildcards, that is, the number of 0-bits in 'netmask'. 'netmask' |
67 | * must be a CIDR netmask (see ip_is_cidr()). */ | |
0596e897 BP |
68 | int |
69 | ofputil_netmask_to_wcbits(ovs_be32 netmask) | |
70 | { | |
aad29cd1 | 71 | return 32 - ip_count_cidr_bits(netmask); |
0596e897 BP |
72 | } |
73 | ||
d8ae4d67 BP |
74 | /* A list of the FWW_* and OFPFW_ bits that have the same value, meaning, and |
75 | * name. */ | |
76 | #define WC_INVARIANT_LIST \ | |
77 | WC_INVARIANT_BIT(IN_PORT) \ | |
d8ae4d67 BP |
78 | WC_INVARIANT_BIT(DL_SRC) \ |
79 | WC_INVARIANT_BIT(DL_DST) \ | |
80 | WC_INVARIANT_BIT(DL_TYPE) \ | |
73f33563 | 81 | WC_INVARIANT_BIT(NW_PROTO) |
d8ae4d67 BP |
82 | |
83 | /* Verify that all of the invariant bits (as defined on WC_INVARIANT_LIST) | |
84 | * actually have the same names and values. */ | |
85 | #define WC_INVARIANT_BIT(NAME) BUILD_ASSERT_DECL(FWW_##NAME == OFPFW_##NAME); | |
86 | WC_INVARIANT_LIST | |
87 | #undef WC_INVARIANT_BIT | |
88 | ||
89 | /* WC_INVARIANTS is the invariant bits (as defined on WC_INVARIANT_LIST) all | |
90 | * OR'd together. */ | |
eeba8e4f | 91 | static const flow_wildcards_t WC_INVARIANTS = 0 |
d8ae4d67 BP |
92 | #define WC_INVARIANT_BIT(NAME) | FWW_##NAME |
93 | WC_INVARIANT_LIST | |
94 | #undef WC_INVARIANT_BIT | |
eeba8e4f | 95 | ; |
d8ae4d67 | 96 | |
eb6f28db BP |
97 | /* Converts the wildcard in 'ofpfw' into a flow_wildcards in 'wc' for use in |
98 | * struct cls_rule. It is the caller's responsibility to handle the special | |
99 | * case where the flow match's dl_vlan is set to OFP_VLAN_NONE. */ | |
7286b1e1 | 100 | void |
eb6f28db | 101 | ofputil_wildcard_from_openflow(uint32_t ofpfw, struct flow_wildcards *wc) |
d8ae4d67 | 102 | { |
73f33563 | 103 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 8); |
a877206f | 104 | |
d8ae4d67 | 105 | /* Initialize most of rule->wc. */ |
f9ba8dad | 106 | flow_wildcards_init_catchall(wc); |
eeba8e4f | 107 | wc->wildcards = (OVS_FORCE flow_wildcards_t) ofpfw & WC_INVARIANTS; |
bad68a99 JP |
108 | |
109 | /* Wildcard fields that aren't defined by ofp_match or tun_id. */ | |
2486e66a | 110 | wc->wildcards |= (FWW_ARP_SHA | FWW_ARP_THA | FWW_NW_ECN | FWW_NW_TTL |
a61680c6 | 111 | | FWW_ND_TARGET | FWW_IPV6_LABEL); |
bad68a99 | 112 | |
2486e66a JP |
113 | if (ofpfw & OFPFW_NW_TOS) { |
114 | /* OpenFlow 1.0 defines a TOS wildcard, but it's much later in | |
115 | * the enum than we can use. */ | |
116 | wc->wildcards |= FWW_NW_DSCP; | |
d8ae4d67 | 117 | } |
7257b535 | 118 | |
d8ae4d67 BP |
119 | wc->nw_src_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_SRC_SHIFT); |
120 | wc->nw_dst_mask = ofputil_wcbits_to_netmask(ofpfw >> OFPFW_NW_DST_SHIFT); | |
121 | ||
73f33563 BP |
122 | if (!(ofpfw & OFPFW_TP_SRC)) { |
123 | wc->tp_src_mask = htons(UINT16_MAX); | |
124 | } | |
125 | if (!(ofpfw & OFPFW_TP_DST)) { | |
126 | wc->tp_dst_mask = htons(UINT16_MAX); | |
127 | } | |
128 | ||
d8ae4d67 BP |
129 | if (ofpfw & OFPFW_DL_DST) { |
130 | /* OpenFlow 1.0 OFPFW_DL_DST covers the whole Ethernet destination, but | |
131 | * Open vSwitch breaks the Ethernet destination into bits as FWW_DL_DST | |
132 | * and FWW_ETH_MCAST. */ | |
133 | wc->wildcards |= FWW_ETH_MCAST; | |
134 | } | |
135 | ||
eb6f28db BP |
136 | /* VLAN TCI mask. */ |
137 | if (!(ofpfw & OFPFW_DL_VLAN_PCP)) { | |
138 | wc->vlan_tci_mask |= htons(VLAN_PCP_MASK | VLAN_CFI); | |
139 | } | |
140 | if (!(ofpfw & OFPFW_DL_VLAN)) { | |
141 | wc->vlan_tci_mask |= htons(VLAN_VID_MASK | VLAN_CFI); | |
142 | } | |
143 | } | |
144 | ||
145 | /* Converts the ofp_match in 'match' into a cls_rule in 'rule', with the given | |
146 | * 'priority'. */ | |
147 | void | |
148 | ofputil_cls_rule_from_match(const struct ofp_match *match, | |
149 | unsigned int priority, struct cls_rule *rule) | |
150 | { | |
151 | uint32_t ofpfw = ntohl(match->wildcards) & OFPFW_ALL; | |
152 | ||
153 | /* Initialize rule->priority, rule->wc. */ | |
154 | rule->priority = !ofpfw ? UINT16_MAX : priority; | |
155 | ofputil_wildcard_from_openflow(ofpfw, &rule->wc); | |
156 | ||
66642cb4 | 157 | /* Initialize most of rule->flow. */ |
d8ae4d67 BP |
158 | rule->flow.nw_src = match->nw_src; |
159 | rule->flow.nw_dst = match->nw_dst; | |
abe529af | 160 | rule->flow.in_port = ntohs(match->in_port); |
36956a7d | 161 | rule->flow.dl_type = ofputil_dl_type_from_openflow(match->dl_type); |
d8ae4d67 BP |
162 | rule->flow.tp_src = match->tp_src; |
163 | rule->flow.tp_dst = match->tp_dst; | |
164 | memcpy(rule->flow.dl_src, match->dl_src, ETH_ADDR_LEN); | |
165 | memcpy(rule->flow.dl_dst, match->dl_dst, ETH_ADDR_LEN); | |
eadef313 | 166 | rule->flow.nw_tos = match->nw_tos & IP_DSCP_MASK; |
d8ae4d67 BP |
167 | rule->flow.nw_proto = match->nw_proto; |
168 | ||
66642cb4 | 169 | /* Translate VLANs. */ |
47271d0d BP |
170 | if (!(ofpfw & OFPFW_DL_VLAN) && match->dl_vlan == htons(OFP_VLAN_NONE)) { |
171 | /* Match only packets without 802.1Q header. | |
172 | * | |
173 | * When OFPFW_DL_VLAN_PCP is wildcarded, this is obviously correct. | |
174 | * | |
175 | * If OFPFW_DL_VLAN_PCP is matched, the flow match is contradictory, | |
176 | * because we can't have a specific PCP without an 802.1Q header. | |
177 | * However, older versions of OVS treated this as matching packets | |
178 | * withut an 802.1Q header, so we do here too. */ | |
66642cb4 | 179 | rule->flow.vlan_tci = htons(0); |
eb6f28db | 180 | rule->wc.vlan_tci_mask = htons(0xffff); |
47271d0d BP |
181 | } else { |
182 | ovs_be16 vid, pcp, tci; | |
183 | ||
47271d0d BP |
184 | vid = match->dl_vlan & htons(VLAN_VID_MASK); |
185 | pcp = htons((match->dl_vlan_pcp << VLAN_PCP_SHIFT) & VLAN_PCP_MASK); | |
186 | tci = vid | pcp | htons(VLAN_CFI); | |
eb6f28db | 187 | rule->flow.vlan_tci = tci & rule->wc.vlan_tci_mask; |
66642cb4 BP |
188 | } |
189 | ||
d8ae4d67 BP |
190 | /* Clean up. */ |
191 | cls_rule_zero_wildcarded_fields(rule); | |
192 | } | |
193 | ||
b78f6b77 | 194 | /* Convert 'rule' into the OpenFlow match structure 'match'. */ |
d8ae4d67 | 195 | void |
b78f6b77 | 196 | ofputil_cls_rule_to_match(const struct cls_rule *rule, struct ofp_match *match) |
d8ae4d67 BP |
197 | { |
198 | const struct flow_wildcards *wc = &rule->wc; | |
eeba8e4f | 199 | uint32_t ofpfw; |
d8ae4d67 | 200 | |
66642cb4 | 201 | /* Figure out most OpenFlow wildcards. */ |
eeba8e4f | 202 | ofpfw = (OVS_FORCE uint32_t) (wc->wildcards & WC_INVARIANTS); |
d8ae4d67 BP |
203 | ofpfw |= ofputil_netmask_to_wcbits(wc->nw_src_mask) << OFPFW_NW_SRC_SHIFT; |
204 | ofpfw |= ofputil_netmask_to_wcbits(wc->nw_dst_mask) << OFPFW_NW_DST_SHIFT; | |
2486e66a | 205 | if (wc->wildcards & FWW_NW_DSCP) { |
d8ae4d67 BP |
206 | ofpfw |= OFPFW_NW_TOS; |
207 | } | |
73f33563 BP |
208 | if (!wc->tp_src_mask) { |
209 | ofpfw |= OFPFW_TP_SRC; | |
210 | } | |
211 | if (!wc->tp_dst_mask) { | |
212 | ofpfw |= OFPFW_TP_DST; | |
213 | } | |
ff9d3826 | 214 | |
66642cb4 BP |
215 | /* Translate VLANs. */ |
216 | match->dl_vlan = htons(0); | |
217 | match->dl_vlan_pcp = 0; | |
218 | if (rule->wc.vlan_tci_mask == htons(0)) { | |
219 | ofpfw |= OFPFW_DL_VLAN | OFPFW_DL_VLAN_PCP; | |
220 | } else if (rule->wc.vlan_tci_mask & htons(VLAN_CFI) | |
221 | && !(rule->flow.vlan_tci & htons(VLAN_CFI))) { | |
222 | match->dl_vlan = htons(OFP_VLAN_NONE); | |
223 | } else { | |
224 | if (!(rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK))) { | |
225 | ofpfw |= OFPFW_DL_VLAN; | |
226 | } else { | |
227 | match->dl_vlan = htons(vlan_tci_to_vid(rule->flow.vlan_tci)); | |
228 | } | |
229 | ||
230 | if (!(rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK))) { | |
231 | ofpfw |= OFPFW_DL_VLAN_PCP; | |
232 | } else { | |
233 | match->dl_vlan_pcp = vlan_tci_to_pcp(rule->flow.vlan_tci); | |
234 | } | |
235 | } | |
236 | ||
237 | /* Compose most of the match structure. */ | |
d8ae4d67 | 238 | match->wildcards = htonl(ofpfw); |
abe529af | 239 | match->in_port = htons(rule->flow.in_port); |
d8ae4d67 BP |
240 | memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN); |
241 | memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN); | |
36956a7d | 242 | match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type); |
d8ae4d67 BP |
243 | match->nw_src = rule->flow.nw_src; |
244 | match->nw_dst = rule->flow.nw_dst; | |
eadef313 | 245 | match->nw_tos = rule->flow.nw_tos & IP_DSCP_MASK; |
d8ae4d67 BP |
246 | match->nw_proto = rule->flow.nw_proto; |
247 | match->tp_src = rule->flow.tp_src; | |
248 | match->tp_dst = rule->flow.tp_dst; | |
249 | memset(match->pad1, '\0', sizeof match->pad1); | |
250 | memset(match->pad2, '\0', sizeof match->pad2); | |
251 | } | |
252 | ||
36956a7d BP |
253 | /* Given a 'dl_type' value in the format used in struct flow, returns the |
254 | * corresponding 'dl_type' value for use in an OpenFlow ofp_match structure. */ | |
255 | ovs_be16 | |
256 | ofputil_dl_type_to_openflow(ovs_be16 flow_dl_type) | |
257 | { | |
258 | return (flow_dl_type == htons(FLOW_DL_TYPE_NONE) | |
259 | ? htons(OFP_DL_TYPE_NOT_ETH_TYPE) | |
260 | : flow_dl_type); | |
261 | } | |
262 | ||
263 | /* Given a 'dl_type' value in the format used in an OpenFlow ofp_match | |
264 | * structure, returns the corresponding 'dl_type' value for use in struct | |
265 | * flow. */ | |
266 | ovs_be16 | |
267 | ofputil_dl_type_from_openflow(ovs_be16 ofp_dl_type) | |
268 | { | |
269 | return (ofp_dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE) | |
270 | ? htons(FLOW_DL_TYPE_NONE) | |
271 | : ofp_dl_type); | |
272 | } | |
273 | ||
72fae175 | 274 | /* Returns a transaction ID to use for an outgoing OpenFlow message. */ |
44381c1b | 275 | static ovs_be32 |
fa37b408 BP |
276 | alloc_xid(void) |
277 | { | |
72fae175 | 278 | static uint32_t next_xid = 1; |
44381c1b | 279 | return htonl(next_xid++); |
fa37b408 | 280 | } |
d1e2cf21 BP |
281 | \f |
282 | /* Basic parsing of OpenFlow messages. */ | |
fa37b408 | 283 | |
d1e2cf21 BP |
284 | struct ofputil_msg_type { |
285 | enum ofputil_msg_code code; /* OFPUTIL_*. */ | |
a1893da1 | 286 | uint8_t ofp_version; /* An OpenFlow version or 0 for "any". */ |
d1e2cf21 BP |
287 | uint32_t value; /* OFPT_*, OFPST_*, NXT_*, or NXST_*. */ |
288 | const char *name; /* e.g. "OFPT_FLOW_REMOVED". */ | |
289 | unsigned int min_size; /* Minimum total message size in bytes. */ | |
290 | /* 0 if 'min_size' is the exact size that the message must be. Otherwise, | |
291 | * the message may exceed 'min_size' by an even multiple of this value. */ | |
292 | unsigned int extra_multiple; | |
293 | }; | |
294 | ||
5a020ef3 BP |
295 | /* Represents a malformed OpenFlow message. */ |
296 | static const struct ofputil_msg_type ofputil_invalid_type = { | |
a1893da1 | 297 | OFPUTIL_MSG_INVALID, 0, 0, "OFPUTIL_MSG_INVALID", 0, 0 |
5a020ef3 BP |
298 | }; |
299 | ||
d1e2cf21 BP |
300 | struct ofputil_msg_category { |
301 | const char *name; /* e.g. "OpenFlow message" */ | |
302 | const struct ofputil_msg_type *types; | |
303 | size_t n_types; | |
90bf1e07 | 304 | enum ofperr missing_error; /* Error value for missing type. */ |
d1e2cf21 BP |
305 | }; |
306 | ||
90bf1e07 | 307 | static enum ofperr |
5a020ef3 | 308 | ofputil_check_length(const struct ofputil_msg_type *type, unsigned int size) |
d1e2cf21 BP |
309 | { |
310 | switch (type->extra_multiple) { | |
311 | case 0: | |
312 | if (size != type->min_size) { | |
5a020ef3 | 313 | VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect " |
d1e2cf21 | 314 | "length %u (expected length %u)", |
5a020ef3 | 315 | type->name, size, type->min_size); |
90bf1e07 | 316 | return OFPERR_OFPBRC_BAD_LEN; |
d1e2cf21 | 317 | } |
5a020ef3 | 318 | return 0; |
d1e2cf21 BP |
319 | |
320 | case 1: | |
321 | if (size < type->min_size) { | |
5a020ef3 | 322 | VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect " |
d1e2cf21 | 323 | "length %u (expected length at least %u bytes)", |
5a020ef3 | 324 | type->name, size, type->min_size); |
90bf1e07 | 325 | return OFPERR_OFPBRC_BAD_LEN; |
d1e2cf21 | 326 | } |
5a020ef3 | 327 | return 0; |
d1e2cf21 BP |
328 | |
329 | default: | |
330 | if (size < type->min_size | |
331 | || (size - type->min_size) % type->extra_multiple) { | |
5a020ef3 | 332 | VLOG_WARN_RL(&bad_ofmsg_rl, "received %s with incorrect " |
d1e2cf21 BP |
333 | "length %u (must be exactly %u bytes or longer " |
334 | "by an integer multiple of %u bytes)", | |
5a020ef3 | 335 | type->name, size, |
d1e2cf21 | 336 | type->min_size, type->extra_multiple); |
90bf1e07 | 337 | return OFPERR_OFPBRC_BAD_LEN; |
d1e2cf21 | 338 | } |
5a020ef3 | 339 | return 0; |
d1e2cf21 BP |
340 | } |
341 | } | |
342 | ||
90bf1e07 | 343 | static enum ofperr |
d1e2cf21 | 344 | ofputil_lookup_openflow_message(const struct ofputil_msg_category *cat, |
a1893da1 | 345 | uint8_t version, uint32_t value, |
d1e2cf21 BP |
346 | const struct ofputil_msg_type **typep) |
347 | { | |
348 | const struct ofputil_msg_type *type; | |
349 | ||
350 | for (type = cat->types; type < &cat->types[cat->n_types]; type++) { | |
a1893da1 BP |
351 | if (type->value == value |
352 | && (!type->ofp_version || version == type->ofp_version)) { | |
d1e2cf21 BP |
353 | *typep = type; |
354 | return 0; | |
355 | } | |
356 | } | |
357 | ||
5c47debb | 358 | VLOG_WARN_RL(&bad_ofmsg_rl, "received %s of unknown type %"PRIu32, |
d1e2cf21 BP |
359 | cat->name, value); |
360 | return cat->missing_error; | |
361 | } | |
362 | ||
90bf1e07 | 363 | static enum ofperr |
5a020ef3 | 364 | ofputil_decode_vendor(const struct ofp_header *oh, size_t length, |
d1e2cf21 BP |
365 | const struct ofputil_msg_type **typep) |
366 | { | |
367 | static const struct ofputil_msg_type nxt_messages[] = { | |
a1893da1 | 368 | { OFPUTIL_NXT_ROLE_REQUEST, OFP10_VERSION, |
d1e2cf21 BP |
369 | NXT_ROLE_REQUEST, "NXT_ROLE_REQUEST", |
370 | sizeof(struct nx_role_request), 0 }, | |
371 | ||
a1893da1 | 372 | { OFPUTIL_NXT_ROLE_REPLY, OFP10_VERSION, |
d1e2cf21 BP |
373 | NXT_ROLE_REPLY, "NXT_ROLE_REPLY", |
374 | sizeof(struct nx_role_request), 0 }, | |
375 | ||
a1893da1 | 376 | { OFPUTIL_NXT_SET_FLOW_FORMAT, OFP10_VERSION, |
d1e2cf21 | 377 | NXT_SET_FLOW_FORMAT, "NXT_SET_FLOW_FORMAT", |
73dbf4ab | 378 | sizeof(struct nx_set_flow_format), 0 }, |
d1e2cf21 | 379 | |
a1893da1 | 380 | { OFPUTIL_NXT_SET_PACKET_IN_FORMAT, OFP10_VERSION, |
54834960 | 381 | NXT_SET_PACKET_IN_FORMAT, "NXT_SET_PACKET_IN_FORMAT", |
73dbf4ab | 382 | sizeof(struct nx_set_packet_in_format), 0 }, |
54834960 | 383 | |
a1893da1 | 384 | { OFPUTIL_NXT_PACKET_IN, OFP10_VERSION, |
54834960 | 385 | NXT_PACKET_IN, "NXT_PACKET_IN", |
73dbf4ab | 386 | sizeof(struct nx_packet_in), 1 }, |
54834960 | 387 | |
a1893da1 | 388 | { OFPUTIL_NXT_FLOW_MOD, OFP10_VERSION, |
d1e2cf21 BP |
389 | NXT_FLOW_MOD, "NXT_FLOW_MOD", |
390 | sizeof(struct nx_flow_mod), 8 }, | |
391 | ||
a1893da1 | 392 | { OFPUTIL_NXT_FLOW_REMOVED, OFP10_VERSION, |
d1e2cf21 BP |
393 | NXT_FLOW_REMOVED, "NXT_FLOW_REMOVED", |
394 | sizeof(struct nx_flow_removed), 8 }, | |
d1e9b9bf | 395 | |
a1893da1 | 396 | { OFPUTIL_NXT_FLOW_MOD_TABLE_ID, OFP10_VERSION, |
d1e9b9bf | 397 | NXT_FLOW_MOD_TABLE_ID, "NXT_FLOW_MOD_TABLE_ID", |
73dbf4ab | 398 | sizeof(struct nx_flow_mod_table_id), 0 }, |
f27f2134 BP |
399 | |
400 | { OFPUTIL_NXT_FLOW_AGE, OFP10_VERSION, | |
401 | NXT_FLOW_AGE, "NXT_FLOW_AGE", | |
402 | sizeof(struct nicira_header), 0 }, | |
80d5aefd BP |
403 | |
404 | { OFPUTIL_NXT_SET_ASYNC_CONFIG, OFP10_VERSION, | |
405 | NXT_SET_ASYNC_CONFIG, "NXT_SET_ASYNC_CONFIG", | |
406 | sizeof(struct nx_async_config), 0 }, | |
a7349929 BP |
407 | |
408 | { OFPUTIL_NXT_SET_CONTROLLER_ID, OFP10_VERSION, | |
409 | NXT_SET_CONTROLLER_ID, "NXT_SET_CONTROLLER_ID", | |
410 | sizeof(struct nx_controller_id), 0 }, | |
d1e2cf21 BP |
411 | }; |
412 | ||
413 | static const struct ofputil_msg_category nxt_category = { | |
414 | "Nicira extension message", | |
415 | nxt_messages, ARRAY_SIZE(nxt_messages), | |
90bf1e07 | 416 | OFPERR_OFPBRC_BAD_SUBTYPE |
d1e2cf21 BP |
417 | }; |
418 | ||
419 | const struct ofp_vendor_header *ovh; | |
420 | const struct nicira_header *nh; | |
421 | ||
5a020ef3 BP |
422 | if (length < sizeof(struct ofp_vendor_header)) { |
423 | if (length == ntohs(oh->length)) { | |
424 | VLOG_WARN_RL(&bad_ofmsg_rl, "truncated vendor message"); | |
425 | } | |
90bf1e07 | 426 | return OFPERR_OFPBRC_BAD_LEN; |
5a020ef3 BP |
427 | } |
428 | ||
d1e2cf21 BP |
429 | ovh = (const struct ofp_vendor_header *) oh; |
430 | if (ovh->vendor != htonl(NX_VENDOR_ID)) { | |
431 | VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor message for unknown " | |
432 | "vendor %"PRIx32, ntohl(ovh->vendor)); | |
90bf1e07 | 433 | return OFPERR_OFPBRC_BAD_VENDOR; |
d1e2cf21 BP |
434 | } |
435 | ||
5a020ef3 BP |
436 | if (length < sizeof(struct nicira_header)) { |
437 | if (length == ntohs(oh->length)) { | |
438 | VLOG_WARN_RL(&bad_ofmsg_rl, "received Nicira vendor message of " | |
439 | "length %u (expected at least %zu)", | |
440 | ntohs(ovh->header.length), | |
441 | sizeof(struct nicira_header)); | |
442 | } | |
90bf1e07 | 443 | return OFPERR_OFPBRC_BAD_LEN; |
d1e2cf21 BP |
444 | } |
445 | ||
446 | nh = (const struct nicira_header *) oh; | |
a1893da1 BP |
447 | return ofputil_lookup_openflow_message(&nxt_category, oh->version, |
448 | ntohl(nh->subtype), typep); | |
d1e2cf21 BP |
449 | } |
450 | ||
90bf1e07 | 451 | static enum ofperr |
5a020ef3 | 452 | check_nxstats_msg(const struct ofp_header *oh, size_t length) |
d1e2cf21 | 453 | { |
28c8bad1 | 454 | const struct ofp_stats_msg *osm = (const struct ofp_stats_msg *) oh; |
d1e2cf21 BP |
455 | ovs_be32 vendor; |
456 | ||
5a020ef3 BP |
457 | if (length < sizeof(struct ofp_vendor_stats_msg)) { |
458 | if (length == ntohs(oh->length)) { | |
459 | VLOG_WARN_RL(&bad_ofmsg_rl, "truncated vendor stats message"); | |
460 | } | |
90bf1e07 | 461 | return OFPERR_OFPBRC_BAD_LEN; |
5a020ef3 BP |
462 | } |
463 | ||
03cd3493 | 464 | memcpy(&vendor, osm + 1, sizeof vendor); |
d1e2cf21 BP |
465 | if (vendor != htonl(NX_VENDOR_ID)) { |
466 | VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor stats message for " | |
467 | "unknown vendor %"PRIx32, ntohl(vendor)); | |
90bf1e07 | 468 | return OFPERR_OFPBRC_BAD_VENDOR; |
d1e2cf21 BP |
469 | } |
470 | ||
5a020ef3 BP |
471 | if (length < sizeof(struct nicira_stats_msg)) { |
472 | if (length == ntohs(osm->header.length)) { | |
473 | VLOG_WARN_RL(&bad_ofmsg_rl, "truncated Nicira stats message"); | |
474 | } | |
90bf1e07 | 475 | return OFPERR_OFPBRC_BAD_LEN; |
d1e2cf21 BP |
476 | } |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
90bf1e07 | 481 | static enum ofperr |
5a020ef3 | 482 | ofputil_decode_nxst_request(const struct ofp_header *oh, size_t length, |
d1e2cf21 BP |
483 | const struct ofputil_msg_type **typep) |
484 | { | |
485 | static const struct ofputil_msg_type nxst_requests[] = { | |
a1893da1 | 486 | { OFPUTIL_NXST_FLOW_REQUEST, OFP10_VERSION, |
d1e2cf21 BP |
487 | NXST_FLOW, "NXST_FLOW request", |
488 | sizeof(struct nx_flow_stats_request), 8 }, | |
489 | ||
a1893da1 | 490 | { OFPUTIL_NXST_AGGREGATE_REQUEST, OFP10_VERSION, |
d1e2cf21 BP |
491 | NXST_AGGREGATE, "NXST_AGGREGATE request", |
492 | sizeof(struct nx_aggregate_stats_request), 8 }, | |
493 | }; | |
494 | ||
495 | static const struct ofputil_msg_category nxst_request_category = { | |
08717852 | 496 | "Nicira extension statistics request", |
d1e2cf21 | 497 | nxst_requests, ARRAY_SIZE(nxst_requests), |
90bf1e07 | 498 | OFPERR_OFPBRC_BAD_SUBTYPE |
d1e2cf21 BP |
499 | }; |
500 | ||
501 | const struct nicira_stats_msg *nsm; | |
90bf1e07 | 502 | enum ofperr error; |
d1e2cf21 | 503 | |
5a020ef3 | 504 | error = check_nxstats_msg(oh, length); |
d1e2cf21 BP |
505 | if (error) { |
506 | return error; | |
507 | } | |
508 | ||
509 | nsm = (struct nicira_stats_msg *) oh; | |
a1893da1 | 510 | return ofputil_lookup_openflow_message(&nxst_request_category, oh->version, |
5a020ef3 | 511 | ntohl(nsm->subtype), typep); |
d1e2cf21 BP |
512 | } |
513 | ||
90bf1e07 | 514 | static enum ofperr |
5a020ef3 | 515 | ofputil_decode_nxst_reply(const struct ofp_header *oh, size_t length, |
d1e2cf21 BP |
516 | const struct ofputil_msg_type **typep) |
517 | { | |
518 | static const struct ofputil_msg_type nxst_replies[] = { | |
a1893da1 | 519 | { OFPUTIL_NXST_FLOW_REPLY, OFP10_VERSION, |
d1e2cf21 BP |
520 | NXST_FLOW, "NXST_FLOW reply", |
521 | sizeof(struct nicira_stats_msg), 8 }, | |
522 | ||
a1893da1 | 523 | { OFPUTIL_NXST_AGGREGATE_REPLY, OFP10_VERSION, |
d1e2cf21 BP |
524 | NXST_AGGREGATE, "NXST_AGGREGATE reply", |
525 | sizeof(struct nx_aggregate_stats_reply), 0 }, | |
526 | }; | |
527 | ||
528 | static const struct ofputil_msg_category nxst_reply_category = { | |
08717852 | 529 | "Nicira extension statistics reply", |
d1e2cf21 | 530 | nxst_replies, ARRAY_SIZE(nxst_replies), |
90bf1e07 | 531 | OFPERR_OFPBRC_BAD_SUBTYPE |
d1e2cf21 BP |
532 | }; |
533 | ||
534 | const struct nicira_stats_msg *nsm; | |
90bf1e07 | 535 | enum ofperr error; |
d1e2cf21 | 536 | |
5a020ef3 | 537 | error = check_nxstats_msg(oh, length); |
d1e2cf21 BP |
538 | if (error) { |
539 | return error; | |
540 | } | |
541 | ||
542 | nsm = (struct nicira_stats_msg *) oh; | |
a1893da1 | 543 | return ofputil_lookup_openflow_message(&nxst_reply_category, oh->version, |
5a020ef3 BP |
544 | ntohl(nsm->subtype), typep); |
545 | } | |
546 | ||
90bf1e07 | 547 | static enum ofperr |
5a020ef3 BP |
548 | check_stats_msg(const struct ofp_header *oh, size_t length) |
549 | { | |
550 | if (length < sizeof(struct ofp_stats_msg)) { | |
551 | if (length == ntohs(oh->length)) { | |
552 | VLOG_WARN_RL(&bad_ofmsg_rl, "truncated stats message"); | |
553 | } | |
90bf1e07 | 554 | return OFPERR_OFPBRC_BAD_LEN; |
5a020ef3 BP |
555 | } |
556 | ||
557 | return 0; | |
d1e2cf21 BP |
558 | } |
559 | ||
90bf1e07 | 560 | static enum ofperr |
5a020ef3 | 561 | ofputil_decode_ofpst_request(const struct ofp_header *oh, size_t length, |
d1e2cf21 BP |
562 | const struct ofputil_msg_type **typep) |
563 | { | |
d1e2cf21 | 564 | static const struct ofputil_msg_type ofpst_requests[] = { |
a1893da1 | 565 | { OFPUTIL_OFPST_DESC_REQUEST, OFP10_VERSION, |
d1e2cf21 | 566 | OFPST_DESC, "OFPST_DESC request", |
63f2140a | 567 | sizeof(struct ofp_stats_msg), 0 }, |
d1e2cf21 | 568 | |
a1893da1 | 569 | { OFPUTIL_OFPST_FLOW_REQUEST, OFP10_VERSION, |
d1e2cf21 | 570 | OFPST_FLOW, "OFPST_FLOW request", |
63f2140a | 571 | sizeof(struct ofp_flow_stats_request), 0 }, |
d1e2cf21 | 572 | |
a1893da1 | 573 | { OFPUTIL_OFPST_AGGREGATE_REQUEST, OFP10_VERSION, |
d1e2cf21 | 574 | OFPST_AGGREGATE, "OFPST_AGGREGATE request", |
63f2140a | 575 | sizeof(struct ofp_flow_stats_request), 0 }, |
d1e2cf21 | 576 | |
a1893da1 | 577 | { OFPUTIL_OFPST_TABLE_REQUEST, OFP10_VERSION, |
d1e2cf21 | 578 | OFPST_TABLE, "OFPST_TABLE request", |
63f2140a | 579 | sizeof(struct ofp_stats_msg), 0 }, |
d1e2cf21 | 580 | |
a1893da1 | 581 | { OFPUTIL_OFPST_PORT_REQUEST, OFP10_VERSION, |
d1e2cf21 | 582 | OFPST_PORT, "OFPST_PORT request", |
63f2140a | 583 | sizeof(struct ofp_port_stats_request), 0 }, |
d1e2cf21 | 584 | |
a1893da1 | 585 | { OFPUTIL_OFPST_QUEUE_REQUEST, OFP10_VERSION, |
d1e2cf21 | 586 | OFPST_QUEUE, "OFPST_QUEUE request", |
63f2140a | 587 | sizeof(struct ofp_queue_stats_request), 0 }, |
d1e2cf21 | 588 | |
a1893da1 | 589 | { 0, 0, |
d1e2cf21 | 590 | OFPST_VENDOR, "OFPST_VENDOR request", |
63f2140a | 591 | sizeof(struct ofp_vendor_stats_msg), 1 }, |
d1e2cf21 BP |
592 | }; |
593 | ||
594 | static const struct ofputil_msg_category ofpst_request_category = { | |
595 | "OpenFlow statistics", | |
596 | ofpst_requests, ARRAY_SIZE(ofpst_requests), | |
90bf1e07 | 597 | OFPERR_OFPBRC_BAD_STAT |
d1e2cf21 BP |
598 | }; |
599 | ||
28c8bad1 | 600 | const struct ofp_stats_msg *request = (const struct ofp_stats_msg *) oh; |
90bf1e07 | 601 | enum ofperr error; |
d1e2cf21 | 602 | |
5a020ef3 BP |
603 | error = check_stats_msg(oh, length); |
604 | if (error) { | |
605 | return error; | |
606 | } | |
607 | ||
d1e2cf21 | 608 | error = ofputil_lookup_openflow_message(&ofpst_request_category, |
a1893da1 BP |
609 | oh->version, ntohs(request->type), |
610 | typep); | |
28c8bad1 | 611 | if (!error && request->type == htons(OFPST_VENDOR)) { |
5a020ef3 | 612 | error = ofputil_decode_nxst_request(oh, length, typep); |
d1e2cf21 BP |
613 | } |
614 | return error; | |
615 | } | |
616 | ||
90bf1e07 | 617 | static enum ofperr |
5a020ef3 | 618 | ofputil_decode_ofpst_reply(const struct ofp_header *oh, size_t length, |
d1e2cf21 BP |
619 | const struct ofputil_msg_type **typep) |
620 | { | |
d1e2cf21 | 621 | static const struct ofputil_msg_type ofpst_replies[] = { |
a1893da1 | 622 | { OFPUTIL_OFPST_DESC_REPLY, OFP10_VERSION, |
d1e2cf21 | 623 | OFPST_DESC, "OFPST_DESC reply", |
63f2140a | 624 | sizeof(struct ofp_desc_stats), 0 }, |
d1e2cf21 | 625 | |
a1893da1 | 626 | { OFPUTIL_OFPST_FLOW_REPLY, OFP10_VERSION, |
d1e2cf21 | 627 | OFPST_FLOW, "OFPST_FLOW reply", |
63f2140a | 628 | sizeof(struct ofp_stats_msg), 1 }, |
d1e2cf21 | 629 | |
a1893da1 | 630 | { OFPUTIL_OFPST_AGGREGATE_REPLY, OFP10_VERSION, |
d1e2cf21 | 631 | OFPST_AGGREGATE, "OFPST_AGGREGATE reply", |
63f2140a | 632 | sizeof(struct ofp_aggregate_stats_reply), 0 }, |
d1e2cf21 | 633 | |
a1893da1 | 634 | { OFPUTIL_OFPST_TABLE_REPLY, OFP10_VERSION, |
d1e2cf21 | 635 | OFPST_TABLE, "OFPST_TABLE reply", |
63f2140a | 636 | sizeof(struct ofp_stats_msg), sizeof(struct ofp_table_stats) }, |
d1e2cf21 | 637 | |
a1893da1 | 638 | { OFPUTIL_OFPST_PORT_REPLY, OFP10_VERSION, |
d1e2cf21 | 639 | OFPST_PORT, "OFPST_PORT reply", |
63f2140a | 640 | sizeof(struct ofp_stats_msg), sizeof(struct ofp_port_stats) }, |
d1e2cf21 | 641 | |
a1893da1 | 642 | { OFPUTIL_OFPST_QUEUE_REPLY, OFP10_VERSION, |
d1e2cf21 | 643 | OFPST_QUEUE, "OFPST_QUEUE reply", |
63f2140a | 644 | sizeof(struct ofp_stats_msg), sizeof(struct ofp_queue_stats) }, |
d1e2cf21 | 645 | |
a1893da1 | 646 | { 0, 0, |
d1e2cf21 | 647 | OFPST_VENDOR, "OFPST_VENDOR reply", |
63f2140a | 648 | sizeof(struct ofp_vendor_stats_msg), 1 }, |
d1e2cf21 BP |
649 | }; |
650 | ||
651 | static const struct ofputil_msg_category ofpst_reply_category = { | |
652 | "OpenFlow statistics", | |
653 | ofpst_replies, ARRAY_SIZE(ofpst_replies), | |
90bf1e07 | 654 | OFPERR_OFPBRC_BAD_STAT |
d1e2cf21 BP |
655 | }; |
656 | ||
28c8bad1 | 657 | const struct ofp_stats_msg *reply = (const struct ofp_stats_msg *) oh; |
90bf1e07 | 658 | enum ofperr error; |
d1e2cf21 | 659 | |
5a020ef3 BP |
660 | error = check_stats_msg(oh, length); |
661 | if (error) { | |
662 | return error; | |
663 | } | |
664 | ||
a1893da1 | 665 | error = ofputil_lookup_openflow_message(&ofpst_reply_category, oh->version, |
5a020ef3 | 666 | ntohs(reply->type), typep); |
28c8bad1 | 667 | if (!error && reply->type == htons(OFPST_VENDOR)) { |
5a020ef3 | 668 | error = ofputil_decode_nxst_reply(oh, length, typep); |
d1e2cf21 BP |
669 | } |
670 | return error; | |
671 | } | |
672 | ||
90bf1e07 | 673 | static enum ofperr |
5a020ef3 BP |
674 | ofputil_decode_msg_type__(const struct ofp_header *oh, size_t length, |
675 | const struct ofputil_msg_type **typep) | |
d1e2cf21 BP |
676 | { |
677 | static const struct ofputil_msg_type ofpt_messages[] = { | |
a1893da1 | 678 | { OFPUTIL_OFPT_HELLO, OFP10_VERSION, |
d1e2cf21 BP |
679 | OFPT_HELLO, "OFPT_HELLO", |
680 | sizeof(struct ofp_hello), 1 }, | |
681 | ||
90bf1e07 | 682 | { OFPUTIL_OFPT_ERROR, 0, |
d1e2cf21 BP |
683 | OFPT_ERROR, "OFPT_ERROR", |
684 | sizeof(struct ofp_error_msg), 1 }, | |
685 | ||
a1893da1 | 686 | { OFPUTIL_OFPT_ECHO_REQUEST, OFP10_VERSION, |
d1e2cf21 BP |
687 | OFPT_ECHO_REQUEST, "OFPT_ECHO_REQUEST", |
688 | sizeof(struct ofp_header), 1 }, | |
689 | ||
a1893da1 | 690 | { OFPUTIL_OFPT_ECHO_REPLY, OFP10_VERSION, |
d1e2cf21 BP |
691 | OFPT_ECHO_REPLY, "OFPT_ECHO_REPLY", |
692 | sizeof(struct ofp_header), 1 }, | |
693 | ||
a1893da1 | 694 | { OFPUTIL_OFPT_FEATURES_REQUEST, OFP10_VERSION, |
d1e2cf21 BP |
695 | OFPT_FEATURES_REQUEST, "OFPT_FEATURES_REQUEST", |
696 | sizeof(struct ofp_header), 0 }, | |
697 | ||
a1893da1 | 698 | { OFPUTIL_OFPT_FEATURES_REPLY, OFP10_VERSION, |
d1e2cf21 BP |
699 | OFPT_FEATURES_REPLY, "OFPT_FEATURES_REPLY", |
700 | sizeof(struct ofp_switch_features), sizeof(struct ofp_phy_port) }, | |
701 | ||
a1893da1 | 702 | { OFPUTIL_OFPT_GET_CONFIG_REQUEST, OFP10_VERSION, |
d1e2cf21 BP |
703 | OFPT_GET_CONFIG_REQUEST, "OFPT_GET_CONFIG_REQUEST", |
704 | sizeof(struct ofp_header), 0 }, | |
705 | ||
a1893da1 | 706 | { OFPUTIL_OFPT_GET_CONFIG_REPLY, OFP10_VERSION, |
d1e2cf21 BP |
707 | OFPT_GET_CONFIG_REPLY, "OFPT_GET_CONFIG_REPLY", |
708 | sizeof(struct ofp_switch_config), 0 }, | |
709 | ||
a1893da1 | 710 | { OFPUTIL_OFPT_SET_CONFIG, OFP10_VERSION, |
d1e2cf21 BP |
711 | OFPT_SET_CONFIG, "OFPT_SET_CONFIG", |
712 | sizeof(struct ofp_switch_config), 0 }, | |
713 | ||
a1893da1 | 714 | { OFPUTIL_OFPT_PACKET_IN, OFP10_VERSION, |
d1e2cf21 BP |
715 | OFPT_PACKET_IN, "OFPT_PACKET_IN", |
716 | offsetof(struct ofp_packet_in, data), 1 }, | |
717 | ||
a1893da1 | 718 | { OFPUTIL_OFPT_FLOW_REMOVED, OFP10_VERSION, |
d1e2cf21 BP |
719 | OFPT_FLOW_REMOVED, "OFPT_FLOW_REMOVED", |
720 | sizeof(struct ofp_flow_removed), 0 }, | |
721 | ||
a1893da1 | 722 | { OFPUTIL_OFPT_PORT_STATUS, OFP10_VERSION, |
d1e2cf21 BP |
723 | OFPT_PORT_STATUS, "OFPT_PORT_STATUS", |
724 | sizeof(struct ofp_port_status), 0 }, | |
725 | ||
a1893da1 | 726 | { OFPUTIL_OFPT_PACKET_OUT, OFP10_VERSION, |
5293a2e1 | 727 | OFPT10_PACKET_OUT, "OFPT_PACKET_OUT", |
d1e2cf21 BP |
728 | sizeof(struct ofp_packet_out), 1 }, |
729 | ||
a1893da1 | 730 | { OFPUTIL_OFPT_FLOW_MOD, OFP10_VERSION, |
5293a2e1 | 731 | OFPT10_FLOW_MOD, "OFPT_FLOW_MOD", |
d1e2cf21 BP |
732 | sizeof(struct ofp_flow_mod), 1 }, |
733 | ||
a1893da1 | 734 | { OFPUTIL_OFPT_PORT_MOD, OFP10_VERSION, |
5293a2e1 | 735 | OFPT10_PORT_MOD, "OFPT_PORT_MOD", |
d1e2cf21 BP |
736 | sizeof(struct ofp_port_mod), 0 }, |
737 | ||
a1893da1 | 738 | { 0, OFP10_VERSION, |
5293a2e1 | 739 | OFPT10_STATS_REQUEST, "OFPT_STATS_REQUEST", |
28c8bad1 | 740 | sizeof(struct ofp_stats_msg), 1 }, |
d1e2cf21 | 741 | |
a1893da1 | 742 | { 0, OFP10_VERSION, |
5293a2e1 | 743 | OFPT10_STATS_REPLY, "OFPT_STATS_REPLY", |
28c8bad1 | 744 | sizeof(struct ofp_stats_msg), 1 }, |
d1e2cf21 | 745 | |
a1893da1 | 746 | { OFPUTIL_OFPT_BARRIER_REQUEST, OFP10_VERSION, |
5293a2e1 | 747 | OFPT10_BARRIER_REQUEST, "OFPT_BARRIER_REQUEST", |
d1e2cf21 BP |
748 | sizeof(struct ofp_header), 0 }, |
749 | ||
a1893da1 | 750 | { OFPUTIL_OFPT_BARRIER_REPLY, OFP10_VERSION, |
5293a2e1 | 751 | OFPT10_BARRIER_REPLY, "OFPT_BARRIER_REPLY", |
d1e2cf21 BP |
752 | sizeof(struct ofp_header), 0 }, |
753 | ||
a1893da1 | 754 | { 0, 0, |
d1e2cf21 BP |
755 | OFPT_VENDOR, "OFPT_VENDOR", |
756 | sizeof(struct ofp_vendor_header), 1 }, | |
757 | }; | |
758 | ||
759 | static const struct ofputil_msg_category ofpt_category = { | |
760 | "OpenFlow message", | |
761 | ofpt_messages, ARRAY_SIZE(ofpt_messages), | |
90bf1e07 | 762 | OFPERR_OFPBRC_BAD_TYPE |
d1e2cf21 BP |
763 | }; |
764 | ||
90bf1e07 | 765 | enum ofperr error; |
d1e2cf21 | 766 | |
a1893da1 BP |
767 | error = ofputil_lookup_openflow_message(&ofpt_category, oh->version, |
768 | oh->type, typep); | |
d1e2cf21 | 769 | if (!error) { |
7887679b BP |
770 | switch ((oh->version << 8) | oh->type) { |
771 | case (OFP10_VERSION << 8) | OFPT_VENDOR: | |
772 | case (OFP11_VERSION << 8) | OFPT_VENDOR: | |
5a020ef3 | 773 | error = ofputil_decode_vendor(oh, length, typep); |
d1e2cf21 BP |
774 | break; |
775 | ||
7887679b BP |
776 | case (OFP10_VERSION << 8) | OFPT10_STATS_REQUEST: |
777 | case (OFP11_VERSION << 8) | OFPT11_STATS_REQUEST: | |
5a020ef3 | 778 | error = ofputil_decode_ofpst_request(oh, length, typep); |
d1e2cf21 BP |
779 | break; |
780 | ||
7887679b BP |
781 | case (OFP10_VERSION << 8) | OFPT10_STATS_REPLY: |
782 | case (OFP11_VERSION << 8) | OFPT11_STATS_REPLY: | |
5a020ef3 | 783 | error = ofputil_decode_ofpst_reply(oh, length, typep); |
d1e2cf21 BP |
784 | |
785 | default: | |
786 | break; | |
787 | } | |
788 | } | |
5a020ef3 BP |
789 | return error; |
790 | } | |
791 | ||
90bf1e07 BP |
792 | /* Decodes the message type represented by 'oh'. Returns 0 if successful or an |
793 | * OpenFlow error code on failure. Either way, stores in '*typep' a type | |
794 | * structure that can be inspected with the ofputil_msg_type_*() functions. | |
5a020ef3 BP |
795 | * |
796 | * oh->length must indicate the correct length of the message (and must be at | |
797 | * least sizeof(struct ofp_header)). | |
798 | * | |
799 | * Success indicates that 'oh' is at least as long as the minimum-length | |
800 | * message of its type. */ | |
90bf1e07 | 801 | enum ofperr |
5a020ef3 BP |
802 | ofputil_decode_msg_type(const struct ofp_header *oh, |
803 | const struct ofputil_msg_type **typep) | |
804 | { | |
805 | size_t length = ntohs(oh->length); | |
90bf1e07 | 806 | enum ofperr error; |
5a020ef3 BP |
807 | |
808 | error = ofputil_decode_msg_type__(oh, length, typep); | |
809 | if (!error) { | |
810 | error = ofputil_check_length(*typep, length); | |
811 | } | |
d1e2cf21 | 812 | if (error) { |
5a020ef3 BP |
813 | *typep = &ofputil_invalid_type; |
814 | } | |
815 | return error; | |
816 | } | |
d1e2cf21 | 817 | |
5a020ef3 BP |
818 | /* Decodes the message type represented by 'oh', of which only the first |
819 | * 'length' bytes are available. Returns 0 if successful or an OpenFlow error | |
90bf1e07 BP |
820 | * code on failure. Either way, stores in '*typep' a type structure that can |
821 | * be inspected with the ofputil_msg_type_*() functions. */ | |
822 | enum ofperr | |
5a020ef3 BP |
823 | ofputil_decode_msg_type_partial(const struct ofp_header *oh, size_t length, |
824 | const struct ofputil_msg_type **typep) | |
825 | { | |
90bf1e07 | 826 | enum ofperr error; |
5a020ef3 BP |
827 | |
828 | error = (length >= sizeof *oh | |
829 | ? ofputil_decode_msg_type__(oh, length, typep) | |
90bf1e07 | 830 | : OFPERR_OFPBRC_BAD_LEN); |
5a020ef3 | 831 | if (error) { |
d1e2cf21 BP |
832 | *typep = &ofputil_invalid_type; |
833 | } | |
834 | return error; | |
835 | } | |
836 | ||
837 | /* Returns an OFPUTIL_* message type code for 'type'. */ | |
838 | enum ofputil_msg_code | |
839 | ofputil_msg_type_code(const struct ofputil_msg_type *type) | |
840 | { | |
841 | return type->code; | |
842 | } | |
2e4f5fcf | 843 | \f |
27527aa0 | 844 | /* Protocols. */ |
7fa91113 | 845 | |
27527aa0 BP |
846 | struct proto_abbrev { |
847 | enum ofputil_protocol protocol; | |
848 | const char *name; | |
849 | }; | |
850 | ||
851 | /* Most users really don't care about some of the differences between | |
852 | * protocols. These abbreviations help with that. */ | |
853 | static const struct proto_abbrev proto_abbrevs[] = { | |
854 | { OFPUTIL_P_ANY, "any" }, | |
855 | { OFPUTIL_P_OF10_ANY, "OpenFlow10" }, | |
856 | { OFPUTIL_P_NXM_ANY, "NXM" }, | |
857 | }; | |
858 | #define N_PROTO_ABBREVS ARRAY_SIZE(proto_abbrevs) | |
859 | ||
860 | enum ofputil_protocol ofputil_flow_dump_protocols[] = { | |
861 | OFPUTIL_P_NXM, | |
862 | OFPUTIL_P_OF10, | |
863 | }; | |
864 | size_t ofputil_n_flow_dump_protocols = ARRAY_SIZE(ofputil_flow_dump_protocols); | |
865 | ||
866 | /* Returns the ofputil_protocol that is initially in effect on an OpenFlow | |
867 | * connection that has negotiated the given 'version'. 'version' should | |
868 | * normally be an 8-bit OpenFlow version identifier (e.g. 0x01 for OpenFlow | |
869 | * 1.0, 0x02 for OpenFlow 1.1). Returns 0 if 'version' is not supported or | |
870 | * outside the valid range. */ | |
871 | enum ofputil_protocol | |
872 | ofputil_protocol_from_ofp_version(int version) | |
873 | { | |
874 | switch (version) { | |
87ea5e5e | 875 | case OFP10_VERSION: return OFPUTIL_P_OF10; |
27527aa0 BP |
876 | default: return 0; |
877 | } | |
878 | } | |
879 | ||
880 | /* Returns true if 'protocol' is a single OFPUTIL_P_* value, false | |
881 | * otherwise. */ | |
7fa91113 | 882 | bool |
27527aa0 | 883 | ofputil_protocol_is_valid(enum ofputil_protocol protocol) |
7fa91113 | 884 | { |
27527aa0 BP |
885 | return protocol & OFPUTIL_P_ANY && is_pow2(protocol); |
886 | } | |
887 | ||
888 | /* Returns the equivalent of 'protocol' with the Nicira flow_mod_table_id | |
889 | * extension turned on or off if 'enable' is true or false, respectively. | |
890 | * | |
891 | * This extension is only useful for protocols whose "standard" version does | |
892 | * not allow specific tables to be modified. In particular, this is true of | |
893 | * OpenFlow 1.0. In later versions of OpenFlow, a flow_mod request always | |
894 | * specifies a table ID and so there is no need for such an extension. When | |
895 | * 'protocol' is such a protocol that doesn't need a flow_mod_table_id | |
896 | * extension, this function just returns its 'protocol' argument unchanged | |
897 | * regardless of the value of 'enable'. */ | |
898 | enum ofputil_protocol | |
899 | ofputil_protocol_set_tid(enum ofputil_protocol protocol, bool enable) | |
900 | { | |
901 | switch (protocol) { | |
902 | case OFPUTIL_P_OF10: | |
903 | case OFPUTIL_P_OF10_TID: | |
904 | return enable ? OFPUTIL_P_OF10_TID : OFPUTIL_P_OF10; | |
905 | ||
906 | case OFPUTIL_P_NXM: | |
907 | case OFPUTIL_P_NXM_TID: | |
908 | return enable ? OFPUTIL_P_NXM_TID : OFPUTIL_P_NXM; | |
909 | ||
910 | default: | |
911 | NOT_REACHED(); | |
7fa91113 | 912 | } |
27527aa0 | 913 | } |
7fa91113 | 914 | |
27527aa0 BP |
915 | /* Returns the "base" version of 'protocol'. That is, if 'protocol' includes |
916 | * some extension to a standard protocol version, the return value is the | |
917 | * standard version of that protocol without any extension. If 'protocol' is a | |
918 | * standard protocol version, returns 'protocol' unchanged. */ | |
919 | enum ofputil_protocol | |
920 | ofputil_protocol_to_base(enum ofputil_protocol protocol) | |
921 | { | |
922 | return ofputil_protocol_set_tid(protocol, false); | |
7fa91113 BP |
923 | } |
924 | ||
27527aa0 BP |
925 | /* Returns 'new_base' with any extensions taken from 'cur'. */ |
926 | enum ofputil_protocol | |
927 | ofputil_protocol_set_base(enum ofputil_protocol cur, | |
928 | enum ofputil_protocol new_base) | |
7fa91113 | 929 | { |
27527aa0 BP |
930 | bool tid = (cur & OFPUTIL_P_TID) != 0; |
931 | ||
932 | switch (new_base) { | |
933 | case OFPUTIL_P_OF10: | |
934 | case OFPUTIL_P_OF10_TID: | |
935 | return ofputil_protocol_set_tid(OFPUTIL_P_OF10, tid); | |
936 | ||
937 | case OFPUTIL_P_NXM: | |
938 | case OFPUTIL_P_NXM_TID: | |
939 | return ofputil_protocol_set_tid(OFPUTIL_P_NXM, tid); | |
940 | ||
7fa91113 BP |
941 | default: |
942 | NOT_REACHED(); | |
943 | } | |
944 | } | |
945 | ||
27527aa0 BP |
946 | /* Returns a string form of 'protocol', if a simple form exists (that is, if |
947 | * 'protocol' is either a single protocol or it is a combination of protocols | |
948 | * that have a single abbreviation). Otherwise, returns NULL. */ | |
949 | const char * | |
950 | ofputil_protocol_to_string(enum ofputil_protocol protocol) | |
88ca35ee | 951 | { |
27527aa0 BP |
952 | const struct proto_abbrev *p; |
953 | ||
954 | /* Use a "switch" statement for single-bit names so that we get a compiler | |
955 | * warning if we forget any. */ | |
956 | switch (protocol) { | |
957 | case OFPUTIL_P_NXM: | |
958 | return "NXM-table_id"; | |
959 | ||
960 | case OFPUTIL_P_NXM_TID: | |
961 | return "NXM+table_id"; | |
962 | ||
963 | case OFPUTIL_P_OF10: | |
964 | return "OpenFlow10-table_id"; | |
965 | ||
966 | case OFPUTIL_P_OF10_TID: | |
967 | return "OpenFlow10+table_id"; | |
968 | } | |
969 | ||
970 | /* Check abbreviations. */ | |
971 | for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) { | |
972 | if (protocol == p->protocol) { | |
973 | return p->name; | |
974 | } | |
975 | } | |
976 | ||
977 | return NULL; | |
978 | } | |
979 | ||
980 | /* Returns a string that represents 'protocols'. The return value might be a | |
981 | * comma-separated list if 'protocols' doesn't have a simple name. The return | |
982 | * value is "none" if 'protocols' is 0. | |
983 | * | |
984 | * The caller must free the returned string (with free()). */ | |
985 | char * | |
986 | ofputil_protocols_to_string(enum ofputil_protocol protocols) | |
987 | { | |
988 | struct ds s; | |
989 | ||
990 | assert(!(protocols & ~OFPUTIL_P_ANY)); | |
991 | if (protocols == 0) { | |
992 | return xstrdup("none"); | |
993 | } | |
994 | ||
995 | ds_init(&s); | |
996 | while (protocols) { | |
997 | const struct proto_abbrev *p; | |
998 | int i; | |
999 | ||
1000 | if (s.length) { | |
1001 | ds_put_char(&s, ','); | |
1002 | } | |
1003 | ||
1004 | for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) { | |
1005 | if ((protocols & p->protocol) == p->protocol) { | |
1006 | ds_put_cstr(&s, p->name); | |
1007 | protocols &= ~p->protocol; | |
1008 | goto match; | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) { | |
1013 | enum ofputil_protocol bit = 1u << i; | |
1014 | ||
1015 | if (protocols & bit) { | |
1016 | ds_put_cstr(&s, ofputil_protocol_to_string(bit)); | |
1017 | protocols &= ~bit; | |
1018 | goto match; | |
1019 | } | |
1020 | } | |
1021 | NOT_REACHED(); | |
1022 | ||
1023 | match: ; | |
1024 | } | |
1025 | return ds_steal_cstr(&s); | |
1026 | } | |
1027 | ||
1028 | static enum ofputil_protocol | |
1029 | ofputil_protocol_from_string__(const char *s, size_t n) | |
1030 | { | |
1031 | const struct proto_abbrev *p; | |
1032 | int i; | |
1033 | ||
1034 | for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) { | |
1035 | enum ofputil_protocol bit = 1u << i; | |
1036 | const char *name = ofputil_protocol_to_string(bit); | |
1037 | ||
1038 | if (name && n == strlen(name) && !strncasecmp(s, name, n)) { | |
1039 | return bit; | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) { | |
1044 | if (n == strlen(p->name) && !strncasecmp(s, p->name, n)) { | |
1045 | return p->protocol; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | /* Returns the nonempty set of protocols represented by 's', which can be a | |
1053 | * single protocol name or abbreviation or a comma-separated list of them. | |
1054 | * | |
1055 | * Aborts the program with an error message if 's' is invalid. */ | |
1056 | enum ofputil_protocol | |
1057 | ofputil_protocols_from_string(const char *s) | |
1058 | { | |
1059 | const char *orig_s = s; | |
1060 | enum ofputil_protocol protocols; | |
1061 | ||
1062 | protocols = 0; | |
1063 | while (*s) { | |
1064 | enum ofputil_protocol p; | |
1065 | size_t n; | |
1066 | ||
1067 | n = strcspn(s, ","); | |
1068 | if (n == 0) { | |
1069 | s++; | |
1070 | continue; | |
1071 | } | |
1072 | ||
1073 | p = ofputil_protocol_from_string__(s, n); | |
1074 | if (!p) { | |
1075 | ovs_fatal(0, "%.*s: unknown flow protocol", (int) n, s); | |
1076 | } | |
1077 | protocols |= p; | |
1078 | ||
1079 | s += n; | |
1080 | } | |
1081 | ||
1082 | if (!protocols) { | |
1083 | ovs_fatal(0, "%s: no flow protocol specified", orig_s); | |
1084 | } | |
1085 | return protocols; | |
88ca35ee BP |
1086 | } |
1087 | ||
54834960 EJ |
1088 | bool |
1089 | ofputil_packet_in_format_is_valid(enum nx_packet_in_format packet_in_format) | |
1090 | { | |
1091 | switch (packet_in_format) { | |
1092 | case NXPIF_OPENFLOW10: | |
1093 | case NXPIF_NXM: | |
1094 | return true; | |
1095 | } | |
1096 | ||
1097 | return false; | |
1098 | } | |
1099 | ||
1100 | const char * | |
1101 | ofputil_packet_in_format_to_string(enum nx_packet_in_format packet_in_format) | |
1102 | { | |
1103 | switch (packet_in_format) { | |
1104 | case NXPIF_OPENFLOW10: | |
1105 | return "openflow10"; | |
1106 | case NXPIF_NXM: | |
1107 | return "nxm"; | |
1108 | default: | |
1109 | NOT_REACHED(); | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | int | |
1114 | ofputil_packet_in_format_from_string(const char *s) | |
1115 | { | |
1116 | return (!strcmp(s, "openflow10") ? NXPIF_OPENFLOW10 | |
1117 | : !strcmp(s, "nxm") ? NXPIF_NXM | |
1118 | : -1); | |
1119 | } | |
1120 | ||
88ca35ee BP |
1121 | static bool |
1122 | regs_fully_wildcarded(const struct flow_wildcards *wc) | |
1123 | { | |
1124 | int i; | |
1125 | ||
1126 | for (i = 0; i < FLOW_N_REGS; i++) { | |
1127 | if (wc->reg_masks[i] != 0) { | |
1128 | return false; | |
1129 | } | |
1130 | } | |
1131 | return true; | |
1132 | } | |
1133 | ||
27527aa0 BP |
1134 | /* Returns a bit-mask of ofputil_protocols that can be used for sending 'rule' |
1135 | * to a switch (e.g. to add or remove a flow). Only NXM can handle tunnel IDs, | |
1136 | * registers, or fixing the Ethernet multicast bit. Otherwise, it's better to | |
1137 | * use OpenFlow 1.0 protocol for backward compatibility. */ | |
1138 | enum ofputil_protocol | |
1139 | ofputil_usable_protocols(const struct cls_rule *rule) | |
8368c090 BP |
1140 | { |
1141 | const struct flow_wildcards *wc = &rule->wc; | |
8368c090 | 1142 | |
73f33563 | 1143 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 8); |
a877206f | 1144 | |
8368c090 BP |
1145 | /* Only NXM supports separately wildcards the Ethernet multicast bit. */ |
1146 | if (!(wc->wildcards & FWW_DL_DST) != !(wc->wildcards & FWW_ETH_MCAST)) { | |
27527aa0 | 1147 | return OFPUTIL_P_NXM_ANY; |
8368c090 BP |
1148 | } |
1149 | ||
bad68a99 JP |
1150 | /* Only NXM supports matching ARP hardware addresses. */ |
1151 | if (!(wc->wildcards & FWW_ARP_SHA) || !(wc->wildcards & FWW_ARP_THA)) { | |
27527aa0 | 1152 | return OFPUTIL_P_NXM_ANY; |
bad68a99 JP |
1153 | } |
1154 | ||
d31f1109 JP |
1155 | /* Only NXM supports matching IPv6 traffic. */ |
1156 | if (!(wc->wildcards & FWW_DL_TYPE) | |
1157 | && (rule->flow.dl_type == htons(ETH_TYPE_IPV6))) { | |
27527aa0 | 1158 | return OFPUTIL_P_NXM_ANY; |
d31f1109 JP |
1159 | } |
1160 | ||
8368c090 BP |
1161 | /* Only NXM supports matching registers. */ |
1162 | if (!regs_fully_wildcarded(wc)) { | |
27527aa0 | 1163 | return OFPUTIL_P_NXM_ANY; |
8368c090 BP |
1164 | } |
1165 | ||
b78f6b77 BP |
1166 | /* Only NXM supports matching tun_id. */ |
1167 | if (wc->tun_id_mask != htonll(0)) { | |
27527aa0 | 1168 | return OFPUTIL_P_NXM_ANY; |
8368c090 BP |
1169 | } |
1170 | ||
7257b535 | 1171 | /* Only NXM supports matching fragments. */ |
eadef313 | 1172 | if (wc->nw_frag_mask) { |
27527aa0 | 1173 | return OFPUTIL_P_NXM_ANY; |
7257b535 BP |
1174 | } |
1175 | ||
fa8223b7 JP |
1176 | /* Only NXM supports matching IPv6 flow label. */ |
1177 | if (!(wc->wildcards & FWW_IPV6_LABEL)) { | |
27527aa0 | 1178 | return OFPUTIL_P_NXM_ANY; |
fa8223b7 JP |
1179 | } |
1180 | ||
530180fd | 1181 | /* Only NXM supports matching IP ECN bits. */ |
2486e66a | 1182 | if (!(wc->wildcards & FWW_NW_ECN)) { |
27527aa0 | 1183 | return OFPUTIL_P_NXM_ANY; |
530180fd JP |
1184 | } |
1185 | ||
a61680c6 JP |
1186 | /* Only NXM supports matching IP TTL/hop limit. */ |
1187 | if (!(wc->wildcards & FWW_NW_TTL)) { | |
27527aa0 | 1188 | return OFPUTIL_P_NXM_ANY; |
a61680c6 JP |
1189 | } |
1190 | ||
73f33563 BP |
1191 | /* Only NXM supports bitwise matching on transport port. */ |
1192 | if ((wc->tp_src_mask && wc->tp_src_mask != htons(UINT16_MAX)) || | |
1193 | (wc->tp_dst_mask && wc->tp_dst_mask != htons(UINT16_MAX))) { | |
27527aa0 | 1194 | return OFPUTIL_P_NXM_ANY; |
73f33563 BP |
1195 | } |
1196 | ||
8368c090 | 1197 | /* Other formats can express this rule. */ |
27527aa0 BP |
1198 | return OFPUTIL_P_ANY; |
1199 | } | |
1200 | ||
1201 | /* Returns an OpenFlow message that, sent on an OpenFlow connection whose | |
1202 | * protocol is 'current', at least partly transitions the protocol to 'want'. | |
1203 | * Stores in '*next' the protocol that will be in effect on the OpenFlow | |
1204 | * connection if the switch processes the returned message correctly. (If | |
1205 | * '*next != want' then the caller will have to iterate.) | |
1206 | * | |
1207 | * If 'current == want', returns NULL and stores 'current' in '*next'. */ | |
1208 | struct ofpbuf * | |
1209 | ofputil_encode_set_protocol(enum ofputil_protocol current, | |
1210 | enum ofputil_protocol want, | |
1211 | enum ofputil_protocol *next) | |
1212 | { | |
1213 | enum ofputil_protocol cur_base, want_base; | |
1214 | bool cur_tid, want_tid; | |
1215 | ||
1216 | cur_base = ofputil_protocol_to_base(current); | |
1217 | want_base = ofputil_protocol_to_base(want); | |
1218 | if (cur_base != want_base) { | |
1219 | *next = ofputil_protocol_set_base(current, want_base); | |
1220 | ||
1221 | switch (want_base) { | |
1222 | case OFPUTIL_P_NXM: | |
1223 | return ofputil_encode_nx_set_flow_format(NXFF_NXM); | |
1224 | ||
1225 | case OFPUTIL_P_OF10: | |
1226 | return ofputil_encode_nx_set_flow_format(NXFF_OPENFLOW10); | |
1227 | ||
1228 | case OFPUTIL_P_OF10_TID: | |
1229 | case OFPUTIL_P_NXM_TID: | |
1230 | NOT_REACHED(); | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | cur_tid = (current & OFPUTIL_P_TID) != 0; | |
1235 | want_tid = (want & OFPUTIL_P_TID) != 0; | |
1236 | if (cur_tid != want_tid) { | |
1237 | *next = ofputil_protocol_set_tid(current, want_tid); | |
1238 | return ofputil_make_flow_mod_table_id(want_tid); | |
1239 | } | |
1240 | ||
1241 | assert(current == want); | |
1242 | ||
1243 | *next = current; | |
1244 | return NULL; | |
88ca35ee BP |
1245 | } |
1246 | ||
27527aa0 BP |
1247 | /* Returns an NXT_SET_FLOW_FORMAT message that can be used to set the flow |
1248 | * format to 'nxff'. */ | |
88ca35ee | 1249 | struct ofpbuf * |
27527aa0 | 1250 | ofputil_encode_nx_set_flow_format(enum nx_flow_format nxff) |
88ca35ee | 1251 | { |
73dbf4ab | 1252 | struct nx_set_flow_format *sff; |
88ca35ee BP |
1253 | struct ofpbuf *msg; |
1254 | ||
27527aa0 BP |
1255 | assert(ofputil_nx_flow_format_is_valid(nxff)); |
1256 | ||
b78f6b77 | 1257 | sff = make_nxmsg(sizeof *sff, NXT_SET_FLOW_FORMAT, &msg); |
27527aa0 | 1258 | sff->format = htonl(nxff); |
88ca35ee BP |
1259 | |
1260 | return msg; | |
1261 | } | |
1262 | ||
27527aa0 BP |
1263 | /* Returns the base protocol if 'flow_format' is a valid NXFF_* value, false |
1264 | * otherwise. */ | |
1265 | enum ofputil_protocol | |
1266 | ofputil_nx_flow_format_to_protocol(enum nx_flow_format flow_format) | |
1267 | { | |
1268 | switch (flow_format) { | |
1269 | case NXFF_OPENFLOW10: | |
1270 | return OFPUTIL_P_OF10; | |
1271 | ||
1272 | case NXFF_NXM: | |
1273 | return OFPUTIL_P_NXM; | |
1274 | ||
1275 | default: | |
1276 | return 0; | |
1277 | } | |
1278 | } | |
1279 | ||
1280 | /* Returns true if 'flow_format' is a valid NXFF_* value, false otherwise. */ | |
1281 | bool | |
1282 | ofputil_nx_flow_format_is_valid(enum nx_flow_format flow_format) | |
1283 | { | |
1284 | return ofputil_nx_flow_format_to_protocol(flow_format) != 0; | |
1285 | } | |
1286 | ||
1287 | /* Returns a string version of 'flow_format', which must be a valid NXFF_* | |
1288 | * value. */ | |
1289 | const char * | |
1290 | ofputil_nx_flow_format_to_string(enum nx_flow_format flow_format) | |
1291 | { | |
1292 | switch (flow_format) { | |
1293 | case NXFF_OPENFLOW10: | |
1294 | return "openflow10"; | |
1295 | case NXFF_NXM: | |
1296 | return "nxm"; | |
1297 | default: | |
1298 | NOT_REACHED(); | |
1299 | } | |
1300 | } | |
1301 | ||
54834960 EJ |
1302 | struct ofpbuf * |
1303 | ofputil_make_set_packet_in_format(enum nx_packet_in_format packet_in_format) | |
1304 | { | |
73dbf4ab | 1305 | struct nx_set_packet_in_format *spif; |
54834960 EJ |
1306 | struct ofpbuf *msg; |
1307 | ||
1308 | spif = make_nxmsg(sizeof *spif, NXT_SET_PACKET_IN_FORMAT, &msg); | |
1309 | spif->format = htonl(packet_in_format); | |
1310 | ||
1311 | return msg; | |
1312 | } | |
1313 | ||
6c1491fb BP |
1314 | /* Returns an OpenFlow message that can be used to turn the flow_mod_table_id |
1315 | * extension on or off (according to 'flow_mod_table_id'). */ | |
1316 | struct ofpbuf * | |
1317 | ofputil_make_flow_mod_table_id(bool flow_mod_table_id) | |
1318 | { | |
73dbf4ab | 1319 | struct nx_flow_mod_table_id *nfmti; |
6c1491fb BP |
1320 | struct ofpbuf *msg; |
1321 | ||
1322 | nfmti = make_nxmsg(sizeof *nfmti, NXT_FLOW_MOD_TABLE_ID, &msg); | |
1323 | nfmti->set = flow_mod_table_id; | |
1324 | return msg; | |
1325 | } | |
1326 | ||
7fa91113 BP |
1327 | /* Converts an OFPT_FLOW_MOD or NXT_FLOW_MOD message 'oh' into an abstract |
1328 | * flow_mod in 'fm'. Returns 0 if successful, otherwise an OpenFlow error | |
1329 | * code. | |
1330 | * | |
2e4f5fcf | 1331 | * Does not validate the flow_mod actions. */ |
90bf1e07 | 1332 | enum ofperr |
a9a2da38 | 1333 | ofputil_decode_flow_mod(struct ofputil_flow_mod *fm, |
27527aa0 BP |
1334 | const struct ofp_header *oh, |
1335 | enum ofputil_protocol protocol) | |
2e4f5fcf BP |
1336 | { |
1337 | const struct ofputil_msg_type *type; | |
6c1491fb | 1338 | uint16_t command; |
2e4f5fcf BP |
1339 | struct ofpbuf b; |
1340 | ||
2013493b | 1341 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); |
2e4f5fcf BP |
1342 | |
1343 | ofputil_decode_msg_type(oh, &type); | |
1344 | if (ofputil_msg_type_code(type) == OFPUTIL_OFPT_FLOW_MOD) { | |
1345 | /* Standard OpenFlow flow_mod. */ | |
2e4f5fcf | 1346 | const struct ofp_flow_mod *ofm; |
1c0b7503 | 1347 | uint16_t priority; |
90bf1e07 | 1348 | enum ofperr error; |
2e4f5fcf BP |
1349 | |
1350 | /* Dissect the message. */ | |
bbc32a88 | 1351 | ofm = ofpbuf_pull(&b, sizeof *ofm); |
2e4f5fcf BP |
1352 | error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions); |
1353 | if (error) { | |
1354 | return error; | |
1355 | } | |
1356 | ||
1c0b7503 BP |
1357 | /* Set priority based on original wildcards. Normally we'd allow |
1358 | * ofputil_cls_rule_from_match() to do this for us, but | |
b459a924 | 1359 | * ofputil_normalize_rule() can put wildcards where the original flow |
1c0b7503 BP |
1360 | * didn't have them. */ |
1361 | priority = ntohs(ofm->priority); | |
1362 | if (!(ofm->match.wildcards & htonl(OFPFW_ALL))) { | |
1363 | priority = UINT16_MAX; | |
1364 | } | |
1365 | ||
b459a924 BP |
1366 | /* Translate the rule. */ |
1367 | ofputil_cls_rule_from_match(&ofm->match, priority, &fm->cr); | |
27527aa0 | 1368 | ofputil_normalize_rule(&fm->cr); |
2e4f5fcf BP |
1369 | |
1370 | /* Translate the message. */ | |
2e4f5fcf | 1371 | fm->cookie = ofm->cookie; |
e729e793 | 1372 | fm->cookie_mask = htonll(UINT64_MAX); |
6c1491fb | 1373 | command = ntohs(ofm->command); |
2e4f5fcf BP |
1374 | fm->idle_timeout = ntohs(ofm->idle_timeout); |
1375 | fm->hard_timeout = ntohs(ofm->hard_timeout); | |
1376 | fm->buffer_id = ntohl(ofm->buffer_id); | |
1377 | fm->out_port = ntohs(ofm->out_port); | |
1378 | fm->flags = ntohs(ofm->flags); | |
1379 | } else if (ofputil_msg_type_code(type) == OFPUTIL_NXT_FLOW_MOD) { | |
1380 | /* Nicira extended flow_mod. */ | |
1381 | const struct nx_flow_mod *nfm; | |
90bf1e07 | 1382 | enum ofperr error; |
2e4f5fcf BP |
1383 | |
1384 | /* Dissect the message. */ | |
bbc32a88 | 1385 | nfm = ofpbuf_pull(&b, sizeof *nfm); |
2e4f5fcf | 1386 | error = nx_pull_match(&b, ntohs(nfm->match_len), ntohs(nfm->priority), |
e729e793 | 1387 | &fm->cr, &fm->cookie, &fm->cookie_mask); |
2e4f5fcf BP |
1388 | if (error) { |
1389 | return error; | |
1390 | } | |
1391 | error = ofputil_pull_actions(&b, b.size, &fm->actions, &fm->n_actions); | |
1392 | if (error) { | |
1393 | return error; | |
1394 | } | |
1395 | ||
1396 | /* Translate the message. */ | |
6c1491fb | 1397 | command = ntohs(nfm->command); |
e729e793 JP |
1398 | if (command == OFPFC_ADD) { |
1399 | if (fm->cookie_mask) { | |
1400 | /* The "NXM_NX_COOKIE*" matches are not valid for flow | |
1401 | * additions. Additions must use the "cookie" field of | |
1402 | * the "nx_flow_mod" structure. */ | |
90bf1e07 | 1403 | return OFPERR_NXBRC_NXM_INVALID; |
e729e793 JP |
1404 | } else { |
1405 | fm->cookie = nfm->cookie; | |
1406 | fm->cookie_mask = htonll(UINT64_MAX); | |
1407 | } | |
1408 | } | |
2e4f5fcf BP |
1409 | fm->idle_timeout = ntohs(nfm->idle_timeout); |
1410 | fm->hard_timeout = ntohs(nfm->hard_timeout); | |
1411 | fm->buffer_id = ntohl(nfm->buffer_id); | |
1412 | fm->out_port = ntohs(nfm->out_port); | |
1413 | fm->flags = ntohs(nfm->flags); | |
1414 | } else { | |
1415 | NOT_REACHED(); | |
1416 | } | |
1417 | ||
27527aa0 | 1418 | if (protocol & OFPUTIL_P_TID) { |
6c1491fb BP |
1419 | fm->command = command & 0xff; |
1420 | fm->table_id = command >> 8; | |
1421 | } else { | |
1422 | fm->command = command; | |
1423 | fm->table_id = 0xff; | |
1424 | } | |
1425 | ||
2e4f5fcf BP |
1426 | return 0; |
1427 | } | |
1428 | ||
1429 | /* Converts 'fm' into an OFPT_FLOW_MOD or NXT_FLOW_MOD message according to | |
27527aa0 | 1430 | * 'protocol' and returns the message. |
6c1491fb BP |
1431 | * |
1432 | * 'flow_mod_table_id' should be true if the NXT_FLOW_MOD_TABLE_ID extension is | |
1433 | * enabled, false otherwise. */ | |
2e4f5fcf | 1434 | struct ofpbuf * |
a9a2da38 | 1435 | ofputil_encode_flow_mod(const struct ofputil_flow_mod *fm, |
27527aa0 | 1436 | enum ofputil_protocol protocol) |
2e4f5fcf BP |
1437 | { |
1438 | size_t actions_len = fm->n_actions * sizeof *fm->actions; | |
27527aa0 BP |
1439 | struct ofp_flow_mod *ofm; |
1440 | struct nx_flow_mod *nfm; | |
2e4f5fcf | 1441 | struct ofpbuf *msg; |
6c1491fb | 1442 | uint16_t command; |
27527aa0 | 1443 | int match_len; |
6c1491fb | 1444 | |
27527aa0 | 1445 | command = (protocol & OFPUTIL_P_TID |
6c1491fb BP |
1446 | ? (fm->command & 0xff) | (fm->table_id << 8) |
1447 | : fm->command); | |
2e4f5fcf | 1448 | |
27527aa0 BP |
1449 | switch (protocol) { |
1450 | case OFPUTIL_P_OF10: | |
1451 | case OFPUTIL_P_OF10_TID: | |
2e4f5fcf | 1452 | msg = ofpbuf_new(sizeof *ofm + actions_len); |
5293a2e1 | 1453 | ofm = put_openflow(sizeof *ofm, OFPT10_FLOW_MOD, msg); |
b78f6b77 BP |
1454 | ofputil_cls_rule_to_match(&fm->cr, &ofm->match); |
1455 | ofm->cookie = fm->cookie; | |
05411977 | 1456 | ofm->command = htons(command); |
2e4f5fcf BP |
1457 | ofm->idle_timeout = htons(fm->idle_timeout); |
1458 | ofm->hard_timeout = htons(fm->hard_timeout); | |
1459 | ofm->priority = htons(fm->cr.priority); | |
1460 | ofm->buffer_id = htonl(fm->buffer_id); | |
1461 | ofm->out_port = htons(fm->out_port); | |
1462 | ofm->flags = htons(fm->flags); | |
27527aa0 | 1463 | break; |
2e4f5fcf | 1464 | |
27527aa0 BP |
1465 | case OFPUTIL_P_NXM: |
1466 | case OFPUTIL_P_NXM_TID: | |
2e4f5fcf BP |
1467 | msg = ofpbuf_new(sizeof *nfm + NXM_TYPICAL_LEN + actions_len); |
1468 | put_nxmsg(sizeof *nfm, NXT_FLOW_MOD, msg); | |
2e4f5fcf | 1469 | nfm = msg->data; |
6c1491fb | 1470 | nfm->command = htons(command); |
e729e793 JP |
1471 | if (command == OFPFC_ADD) { |
1472 | nfm->cookie = fm->cookie; | |
1473 | match_len = nx_put_match(msg, &fm->cr, 0, 0); | |
1474 | } else { | |
1475 | nfm->cookie = 0; | |
1476 | match_len = nx_put_match(msg, &fm->cr, | |
1477 | fm->cookie, fm->cookie_mask); | |
1478 | } | |
2e4f5fcf BP |
1479 | nfm->idle_timeout = htons(fm->idle_timeout); |
1480 | nfm->hard_timeout = htons(fm->hard_timeout); | |
1481 | nfm->priority = htons(fm->cr.priority); | |
1482 | nfm->buffer_id = htonl(fm->buffer_id); | |
1483 | nfm->out_port = htons(fm->out_port); | |
1484 | nfm->flags = htons(fm->flags); | |
1485 | nfm->match_len = htons(match_len); | |
27527aa0 BP |
1486 | break; |
1487 | ||
1488 | default: | |
2e4f5fcf BP |
1489 | NOT_REACHED(); |
1490 | } | |
1491 | ||
1492 | ofpbuf_put(msg, fm->actions, actions_len); | |
1493 | update_openflow_length(msg); | |
1494 | return msg; | |
1495 | } | |
1496 | ||
27527aa0 BP |
1497 | /* Returns a bitmask with a 1-bit for each protocol that could be used to |
1498 | * send all of the 'n_fm's flow table modification requests in 'fms', and a | |
1499 | * 0-bit for each protocol that is inadequate. | |
1500 | * | |
1501 | * (The return value will have at least one 1-bit.) */ | |
1502 | enum ofputil_protocol | |
1503 | ofputil_flow_mod_usable_protocols(const struct ofputil_flow_mod *fms, | |
1504 | size_t n_fms) | |
1505 | { | |
1506 | enum ofputil_protocol usable_protocols; | |
1507 | size_t i; | |
1508 | ||
1509 | usable_protocols = OFPUTIL_P_ANY; | |
1510 | for (i = 0; i < n_fms; i++) { | |
1511 | const struct ofputil_flow_mod *fm = &fms[i]; | |
1512 | ||
1513 | usable_protocols &= ofputil_usable_protocols(&fm->cr); | |
1514 | if (fm->table_id != 0xff) { | |
1515 | usable_protocols &= OFPUTIL_P_TID; | |
1516 | } | |
1517 | if (fm->command != OFPFC_ADD && fm->cookie_mask != htonll(0)) { | |
1518 | usable_protocols &= OFPUTIL_P_NXM_ANY; | |
1519 | } | |
1520 | } | |
1521 | assert(usable_protocols); | |
1522 | ||
1523 | return usable_protocols; | |
1524 | } | |
1525 | ||
90bf1e07 | 1526 | static enum ofperr |
81d1ea94 | 1527 | ofputil_decode_ofpst_flow_request(struct ofputil_flow_stats_request *fsr, |
2e4f5fcf | 1528 | const struct ofp_header *oh, |
2e4f5fcf BP |
1529 | bool aggregate) |
1530 | { | |
63f2140a BP |
1531 | const struct ofp_flow_stats_request *ofsr = |
1532 | (const struct ofp_flow_stats_request *) oh; | |
2e4f5fcf BP |
1533 | |
1534 | fsr->aggregate = aggregate; | |
b78f6b77 | 1535 | ofputil_cls_rule_from_match(&ofsr->match, 0, &fsr->match); |
2e4f5fcf BP |
1536 | fsr->out_port = ntohs(ofsr->out_port); |
1537 | fsr->table_id = ofsr->table_id; | |
e729e793 | 1538 | fsr->cookie = fsr->cookie_mask = htonll(0); |
2e4f5fcf BP |
1539 | |
1540 | return 0; | |
1541 | } | |
1542 | ||
90bf1e07 | 1543 | static enum ofperr |
81d1ea94 | 1544 | ofputil_decode_nxst_flow_request(struct ofputil_flow_stats_request *fsr, |
2e4f5fcf BP |
1545 | const struct ofp_header *oh, |
1546 | bool aggregate) | |
1547 | { | |
1548 | const struct nx_flow_stats_request *nfsr; | |
1549 | struct ofpbuf b; | |
90bf1e07 | 1550 | enum ofperr error; |
2e4f5fcf | 1551 | |
2013493b | 1552 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); |
2e4f5fcf | 1553 | |
bbc32a88 | 1554 | nfsr = ofpbuf_pull(&b, sizeof *nfsr); |
e729e793 JP |
1555 | error = nx_pull_match(&b, ntohs(nfsr->match_len), 0, &fsr->match, |
1556 | &fsr->cookie, &fsr->cookie_mask); | |
2e4f5fcf BP |
1557 | if (error) { |
1558 | return error; | |
1559 | } | |
1560 | if (b.size) { | |
90bf1e07 | 1561 | return OFPERR_OFPBRC_BAD_LEN; |
2e4f5fcf BP |
1562 | } |
1563 | ||
1564 | fsr->aggregate = aggregate; | |
1565 | fsr->out_port = ntohs(nfsr->out_port); | |
1566 | fsr->table_id = nfsr->table_id; | |
1567 | ||
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | /* Converts an OFPST_FLOW, OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE | |
b78f6b77 BP |
1572 | * request 'oh', into an abstract flow_stats_request in 'fsr'. Returns 0 if |
1573 | * successful, otherwise an OpenFlow error code. */ | |
90bf1e07 | 1574 | enum ofperr |
81d1ea94 | 1575 | ofputil_decode_flow_stats_request(struct ofputil_flow_stats_request *fsr, |
b78f6b77 | 1576 | const struct ofp_header *oh) |
2e4f5fcf BP |
1577 | { |
1578 | const struct ofputil_msg_type *type; | |
1579 | struct ofpbuf b; | |
1580 | int code; | |
1581 | ||
2013493b | 1582 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); |
2e4f5fcf BP |
1583 | |
1584 | ofputil_decode_msg_type(oh, &type); | |
1585 | code = ofputil_msg_type_code(type); | |
1586 | switch (code) { | |
1587 | case OFPUTIL_OFPST_FLOW_REQUEST: | |
b78f6b77 | 1588 | return ofputil_decode_ofpst_flow_request(fsr, oh, false); |
2e4f5fcf BP |
1589 | |
1590 | case OFPUTIL_OFPST_AGGREGATE_REQUEST: | |
b78f6b77 | 1591 | return ofputil_decode_ofpst_flow_request(fsr, oh, true); |
2e4f5fcf BP |
1592 | |
1593 | case OFPUTIL_NXST_FLOW_REQUEST: | |
1594 | return ofputil_decode_nxst_flow_request(fsr, oh, false); | |
1595 | ||
1596 | case OFPUTIL_NXST_AGGREGATE_REQUEST: | |
1597 | return ofputil_decode_nxst_flow_request(fsr, oh, true); | |
1598 | ||
1599 | default: | |
1600 | /* Hey, the caller lied. */ | |
1601 | NOT_REACHED(); | |
1602 | } | |
1603 | } | |
1604 | ||
1605 | /* Converts abstract flow_stats_request 'fsr' into an OFPST_FLOW, | |
4ffd1b43 | 1606 | * OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE request 'oh' according to |
27527aa0 | 1607 | * 'protocol', and returns the message. */ |
2e4f5fcf | 1608 | struct ofpbuf * |
81d1ea94 | 1609 | ofputil_encode_flow_stats_request(const struct ofputil_flow_stats_request *fsr, |
27527aa0 | 1610 | enum ofputil_protocol protocol) |
2e4f5fcf BP |
1611 | { |
1612 | struct ofpbuf *msg; | |
1613 | ||
27527aa0 BP |
1614 | switch (protocol) { |
1615 | case OFPUTIL_P_OF10: | |
1616 | case OFPUTIL_P_OF10_TID: { | |
2e4f5fcf BP |
1617 | struct ofp_flow_stats_request *ofsr; |
1618 | int type; | |
1619 | ||
2e4f5fcf | 1620 | type = fsr->aggregate ? OFPST_AGGREGATE : OFPST_FLOW; |
63f2140a | 1621 | ofsr = ofputil_make_stats_request(sizeof *ofsr, type, 0, &msg); |
b78f6b77 | 1622 | ofputil_cls_rule_to_match(&fsr->match, &ofsr->match); |
2e4f5fcf BP |
1623 | ofsr->table_id = fsr->table_id; |
1624 | ofsr->out_port = htons(fsr->out_port); | |
27527aa0 BP |
1625 | break; |
1626 | } | |
1627 | ||
1628 | case OFPUTIL_P_NXM: | |
1629 | case OFPUTIL_P_NXM_TID: { | |
2e4f5fcf BP |
1630 | struct nx_flow_stats_request *nfsr; |
1631 | int match_len; | |
9fb7fa87 | 1632 | int subtype; |
2e4f5fcf | 1633 | |
9fb7fa87 | 1634 | subtype = fsr->aggregate ? NXST_AGGREGATE : NXST_FLOW; |
63f2140a | 1635 | ofputil_make_stats_request(sizeof *nfsr, OFPST_VENDOR, subtype, &msg); |
e729e793 JP |
1636 | match_len = nx_put_match(msg, &fsr->match, |
1637 | fsr->cookie, fsr->cookie_mask); | |
2e4f5fcf BP |
1638 | |
1639 | nfsr = msg->data; | |
1640 | nfsr->out_port = htons(fsr->out_port); | |
1641 | nfsr->match_len = htons(match_len); | |
1642 | nfsr->table_id = fsr->table_id; | |
27527aa0 BP |
1643 | break; |
1644 | } | |
1645 | ||
1646 | default: | |
2e4f5fcf BP |
1647 | NOT_REACHED(); |
1648 | } | |
1649 | ||
1650 | return msg; | |
1651 | } | |
d1e2cf21 | 1652 | |
27527aa0 BP |
1653 | /* Returns a bitmask with a 1-bit for each protocol that could be used to |
1654 | * accurately encode 'fsr', and a 0-bit for each protocol that is inadequate. | |
1655 | * | |
1656 | * (The return value will have at least one 1-bit.) */ | |
1657 | enum ofputil_protocol | |
1658 | ofputil_flow_stats_request_usable_protocols( | |
1659 | const struct ofputil_flow_stats_request *fsr) | |
1660 | { | |
1661 | enum ofputil_protocol usable_protocols; | |
1662 | ||
1663 | usable_protocols = ofputil_usable_protocols(&fsr->match); | |
1664 | if (fsr->cookie_mask != htonll(0)) { | |
1665 | usable_protocols &= OFPUTIL_P_NXM_ANY; | |
1666 | } | |
1667 | return usable_protocols; | |
1668 | } | |
1669 | ||
4ffd1b43 | 1670 | /* Converts an OFPST_FLOW or NXST_FLOW reply in 'msg' into an abstract |
b78f6b77 | 1671 | * ofputil_flow_stats in 'fs'. |
4ffd1b43 BP |
1672 | * |
1673 | * Multiple OFPST_FLOW or NXST_FLOW replies can be packed into a single | |
1674 | * OpenFlow message. Calling this function multiple times for a single 'msg' | |
1675 | * iterates through the replies. The caller must initially leave 'msg''s layer | |
1676 | * pointers null and not modify them between calls. | |
1677 | * | |
f27f2134 BP |
1678 | * Most switches don't send the values needed to populate fs->idle_age and |
1679 | * fs->hard_age, so those members will usually be set to 0. If the switch from | |
1680 | * which 'msg' originated is known to implement NXT_FLOW_AGE, then pass | |
1681 | * 'flow_age_extension' as true so that the contents of 'msg' determine the | |
1682 | * 'idle_age' and 'hard_age' members in 'fs'. | |
1683 | * | |
4ffd1b43 BP |
1684 | * Returns 0 if successful, EOF if no replies were left in this 'msg', |
1685 | * otherwise a positive errno value. */ | |
1686 | int | |
1687 | ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *fs, | |
f27f2134 BP |
1688 | struct ofpbuf *msg, |
1689 | bool flow_age_extension) | |
4ffd1b43 BP |
1690 | { |
1691 | const struct ofputil_msg_type *type; | |
1692 | int code; | |
1693 | ||
1694 | ofputil_decode_msg_type(msg->l2 ? msg->l2 : msg->data, &type); | |
1695 | code = ofputil_msg_type_code(type); | |
1696 | if (!msg->l2) { | |
1697 | msg->l2 = msg->data; | |
1698 | if (code == OFPUTIL_OFPST_FLOW_REPLY) { | |
28c8bad1 | 1699 | ofpbuf_pull(msg, sizeof(struct ofp_stats_msg)); |
4ffd1b43 BP |
1700 | } else if (code == OFPUTIL_NXST_FLOW_REPLY) { |
1701 | ofpbuf_pull(msg, sizeof(struct nicira_stats_msg)); | |
1702 | } else { | |
1703 | NOT_REACHED(); | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | if (!msg->size) { | |
1708 | return EOF; | |
1709 | } else if (code == OFPUTIL_OFPST_FLOW_REPLY) { | |
1710 | const struct ofp_flow_stats *ofs; | |
1711 | size_t length; | |
1712 | ||
1713 | ofs = ofpbuf_try_pull(msg, sizeof *ofs); | |
1714 | if (!ofs) { | |
1715 | VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply has %zu leftover " | |
1716 | "bytes at end", msg->size); | |
1717 | return EINVAL; | |
1718 | } | |
1719 | ||
1720 | length = ntohs(ofs->length); | |
1721 | if (length < sizeof *ofs) { | |
1722 | VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply claims invalid " | |
1723 | "length %zu", length); | |
1724 | return EINVAL; | |
1725 | } | |
1726 | ||
1727 | if (ofputil_pull_actions(msg, length - sizeof *ofs, | |
1728 | &fs->actions, &fs->n_actions)) { | |
1729 | return EINVAL; | |
1730 | } | |
1731 | ||
1732 | fs->cookie = get_32aligned_be64(&ofs->cookie); | |
1733 | ofputil_cls_rule_from_match(&ofs->match, ntohs(ofs->priority), | |
b78f6b77 | 1734 | &fs->rule); |
4ffd1b43 BP |
1735 | fs->table_id = ofs->table_id; |
1736 | fs->duration_sec = ntohl(ofs->duration_sec); | |
1737 | fs->duration_nsec = ntohl(ofs->duration_nsec); | |
1738 | fs->idle_timeout = ntohs(ofs->idle_timeout); | |
1739 | fs->hard_timeout = ntohs(ofs->hard_timeout); | |
f27f2134 BP |
1740 | fs->idle_age = -1; |
1741 | fs->hard_age = -1; | |
4ffd1b43 BP |
1742 | fs->packet_count = ntohll(get_32aligned_be64(&ofs->packet_count)); |
1743 | fs->byte_count = ntohll(get_32aligned_be64(&ofs->byte_count)); | |
1744 | } else if (code == OFPUTIL_NXST_FLOW_REPLY) { | |
1745 | const struct nx_flow_stats *nfs; | |
1746 | size_t match_len, length; | |
1747 | ||
1748 | nfs = ofpbuf_try_pull(msg, sizeof *nfs); | |
1749 | if (!nfs) { | |
1750 | VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply has %zu leftover " | |
1751 | "bytes at end", msg->size); | |
1752 | return EINVAL; | |
1753 | } | |
1754 | ||
1755 | length = ntohs(nfs->length); | |
1756 | match_len = ntohs(nfs->match_len); | |
1757 | if (length < sizeof *nfs + ROUND_UP(match_len, 8)) { | |
1758 | VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply with match_len=%zu " | |
1759 | "claims invalid length %zu", match_len, length); | |
1760 | return EINVAL; | |
1761 | } | |
e729e793 JP |
1762 | if (nx_pull_match(msg, match_len, ntohs(nfs->priority), &fs->rule, |
1763 | NULL, NULL)) { | |
4ffd1b43 BP |
1764 | return EINVAL; |
1765 | } | |
1766 | ||
1767 | if (ofputil_pull_actions(msg, | |
1768 | length - sizeof *nfs - ROUND_UP(match_len, 8), | |
1769 | &fs->actions, &fs->n_actions)) { | |
1770 | return EINVAL; | |
1771 | } | |
1772 | ||
1773 | fs->cookie = nfs->cookie; | |
1774 | fs->table_id = nfs->table_id; | |
1775 | fs->duration_sec = ntohl(nfs->duration_sec); | |
1776 | fs->duration_nsec = ntohl(nfs->duration_nsec); | |
1777 | fs->idle_timeout = ntohs(nfs->idle_timeout); | |
1778 | fs->hard_timeout = ntohs(nfs->hard_timeout); | |
f27f2134 BP |
1779 | fs->idle_age = -1; |
1780 | fs->hard_age = -1; | |
1781 | if (flow_age_extension) { | |
1782 | if (nfs->idle_age) { | |
1783 | fs->idle_age = ntohs(nfs->idle_age) - 1; | |
1784 | } | |
1785 | if (nfs->hard_age) { | |
1786 | fs->hard_age = ntohs(nfs->hard_age) - 1; | |
1787 | } | |
1788 | } | |
4ffd1b43 BP |
1789 | fs->packet_count = ntohll(nfs->packet_count); |
1790 | fs->byte_count = ntohll(nfs->byte_count); | |
1791 | } else { | |
1792 | NOT_REACHED(); | |
1793 | } | |
1794 | ||
1795 | return 0; | |
1796 | } | |
1797 | ||
5e9d0469 BP |
1798 | /* Returns 'count' unchanged except that UINT64_MAX becomes 0. |
1799 | * | |
1800 | * We use this in situations where OVS internally uses UINT64_MAX to mean | |
1801 | * "value unknown" but OpenFlow 1.0 does not define any unknown value. */ | |
1802 | static uint64_t | |
1803 | unknown_to_zero(uint64_t count) | |
1804 | { | |
1805 | return count != UINT64_MAX ? count : 0; | |
1806 | } | |
1807 | ||
349adfb2 BP |
1808 | /* Appends an OFPST_FLOW or NXST_FLOW reply that contains the data in 'fs' to |
1809 | * those already present in the list of ofpbufs in 'replies'. 'replies' should | |
1810 | * have been initialized with ofputil_start_stats_reply(). */ | |
1811 | void | |
1812 | ofputil_append_flow_stats_reply(const struct ofputil_flow_stats *fs, | |
1813 | struct list *replies) | |
1814 | { | |
1815 | size_t act_len = fs->n_actions * sizeof *fs->actions; | |
1816 | const struct ofp_stats_msg *osm; | |
1817 | ||
1818 | osm = ofpbuf_from_list(list_back(replies))->data; | |
1819 | if (osm->type == htons(OFPST_FLOW)) { | |
1820 | size_t len = offsetof(struct ofp_flow_stats, actions) + act_len; | |
1821 | struct ofp_flow_stats *ofs; | |
1822 | ||
1823 | ofs = ofputil_append_stats_reply(len, replies); | |
1824 | ofs->length = htons(len); | |
1825 | ofs->table_id = fs->table_id; | |
1826 | ofs->pad = 0; | |
1827 | ofputil_cls_rule_to_match(&fs->rule, &ofs->match); | |
1828 | ofs->duration_sec = htonl(fs->duration_sec); | |
1829 | ofs->duration_nsec = htonl(fs->duration_nsec); | |
1830 | ofs->priority = htons(fs->rule.priority); | |
1831 | ofs->idle_timeout = htons(fs->idle_timeout); | |
1832 | ofs->hard_timeout = htons(fs->hard_timeout); | |
1833 | memset(ofs->pad2, 0, sizeof ofs->pad2); | |
1834 | put_32aligned_be64(&ofs->cookie, fs->cookie); | |
5e9d0469 BP |
1835 | put_32aligned_be64(&ofs->packet_count, |
1836 | htonll(unknown_to_zero(fs->packet_count))); | |
1837 | put_32aligned_be64(&ofs->byte_count, | |
1838 | htonll(unknown_to_zero(fs->byte_count))); | |
349adfb2 BP |
1839 | memcpy(ofs->actions, fs->actions, act_len); |
1840 | } else if (osm->type == htons(OFPST_VENDOR)) { | |
1841 | struct nx_flow_stats *nfs; | |
1842 | struct ofpbuf *msg; | |
1843 | size_t start_len; | |
1844 | ||
1845 | msg = ofputil_reserve_stats_reply( | |
1846 | sizeof *nfs + NXM_MAX_LEN + act_len, replies); | |
1847 | start_len = msg->size; | |
1848 | ||
1849 | nfs = ofpbuf_put_uninit(msg, sizeof *nfs); | |
1850 | nfs->table_id = fs->table_id; | |
1851 | nfs->pad = 0; | |
1852 | nfs->duration_sec = htonl(fs->duration_sec); | |
1853 | nfs->duration_nsec = htonl(fs->duration_nsec); | |
1854 | nfs->priority = htons(fs->rule.priority); | |
1855 | nfs->idle_timeout = htons(fs->idle_timeout); | |
1856 | nfs->hard_timeout = htons(fs->hard_timeout); | |
f27f2134 BP |
1857 | nfs->idle_age = htons(fs->idle_age < 0 ? 0 |
1858 | : fs->idle_age < UINT16_MAX ? fs->idle_age + 1 | |
1859 | : UINT16_MAX); | |
1860 | nfs->hard_age = htons(fs->hard_age < 0 ? 0 | |
1861 | : fs->hard_age < UINT16_MAX ? fs->hard_age + 1 | |
1862 | : UINT16_MAX); | |
e729e793 | 1863 | nfs->match_len = htons(nx_put_match(msg, &fs->rule, 0, 0)); |
349adfb2 BP |
1864 | nfs->cookie = fs->cookie; |
1865 | nfs->packet_count = htonll(fs->packet_count); | |
1866 | nfs->byte_count = htonll(fs->byte_count); | |
1867 | ofpbuf_put(msg, fs->actions, act_len); | |
1868 | nfs->length = htons(msg->size - start_len); | |
1869 | } else { | |
1870 | NOT_REACHED(); | |
1871 | } | |
1872 | } | |
1873 | ||
76c93b22 | 1874 | /* Converts abstract ofputil_aggregate_stats 'stats' into an OFPST_AGGREGATE or |
27527aa0 | 1875 | * NXST_AGGREGATE reply according to 'protocol', and returns the message. */ |
76c93b22 BP |
1876 | struct ofpbuf * |
1877 | ofputil_encode_aggregate_stats_reply( | |
1878 | const struct ofputil_aggregate_stats *stats, | |
1879 | const struct ofp_stats_msg *request) | |
1880 | { | |
1881 | struct ofpbuf *msg; | |
1882 | ||
1883 | if (request->type == htons(OFPST_AGGREGATE)) { | |
1884 | struct ofp_aggregate_stats_reply *asr; | |
1885 | ||
1886 | asr = ofputil_make_stats_reply(sizeof *asr, request, &msg); | |
5e9d0469 BP |
1887 | put_32aligned_be64(&asr->packet_count, |
1888 | htonll(unknown_to_zero(stats->packet_count))); | |
1889 | put_32aligned_be64(&asr->byte_count, | |
1890 | htonll(unknown_to_zero(stats->byte_count))); | |
76c93b22 BP |
1891 | asr->flow_count = htonl(stats->flow_count); |
1892 | } else if (request->type == htons(OFPST_VENDOR)) { | |
1893 | struct nx_aggregate_stats_reply *nasr; | |
1894 | ||
1895 | nasr = ofputil_make_stats_reply(sizeof *nasr, request, &msg); | |
1896 | assert(nasr->nsm.subtype == htonl(NXST_AGGREGATE)); | |
1897 | nasr->packet_count = htonll(stats->packet_count); | |
1898 | nasr->byte_count = htonll(stats->byte_count); | |
1899 | nasr->flow_count = htonl(stats->flow_count); | |
1900 | } else { | |
1901 | NOT_REACHED(); | |
1902 | } | |
1903 | ||
1904 | return msg; | |
1905 | } | |
1906 | ||
b78f6b77 BP |
1907 | /* Converts an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message 'oh' into an |
1908 | * abstract ofputil_flow_removed in 'fr'. Returns 0 if successful, otherwise | |
1909 | * an OpenFlow error code. */ | |
90bf1e07 | 1910 | enum ofperr |
9b045a0c | 1911 | ofputil_decode_flow_removed(struct ofputil_flow_removed *fr, |
b78f6b77 | 1912 | const struct ofp_header *oh) |
9b045a0c BP |
1913 | { |
1914 | const struct ofputil_msg_type *type; | |
1915 | enum ofputil_msg_code code; | |
1916 | ||
1917 | ofputil_decode_msg_type(oh, &type); | |
1918 | code = ofputil_msg_type_code(type); | |
1919 | if (code == OFPUTIL_OFPT_FLOW_REMOVED) { | |
1920 | const struct ofp_flow_removed *ofr; | |
1921 | ||
1922 | ofr = (const struct ofp_flow_removed *) oh; | |
1923 | ofputil_cls_rule_from_match(&ofr->match, ntohs(ofr->priority), | |
b78f6b77 | 1924 | &fr->rule); |
9b045a0c BP |
1925 | fr->cookie = ofr->cookie; |
1926 | fr->reason = ofr->reason; | |
1927 | fr->duration_sec = ntohl(ofr->duration_sec); | |
1928 | fr->duration_nsec = ntohl(ofr->duration_nsec); | |
1929 | fr->idle_timeout = ntohs(ofr->idle_timeout); | |
1930 | fr->packet_count = ntohll(ofr->packet_count); | |
1931 | fr->byte_count = ntohll(ofr->byte_count); | |
1932 | } else if (code == OFPUTIL_NXT_FLOW_REMOVED) { | |
1933 | struct nx_flow_removed *nfr; | |
1934 | struct ofpbuf b; | |
1935 | int error; | |
1936 | ||
1937 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); | |
1938 | ||
1939 | nfr = ofpbuf_pull(&b, sizeof *nfr); | |
1940 | error = nx_pull_match(&b, ntohs(nfr->match_len), ntohs(nfr->priority), | |
e729e793 | 1941 | &fr->rule, NULL, NULL); |
9b045a0c BP |
1942 | if (error) { |
1943 | return error; | |
1944 | } | |
1945 | if (b.size) { | |
90bf1e07 | 1946 | return OFPERR_OFPBRC_BAD_LEN; |
9b045a0c BP |
1947 | } |
1948 | ||
1949 | fr->cookie = nfr->cookie; | |
1950 | fr->reason = nfr->reason; | |
1951 | fr->duration_sec = ntohl(nfr->duration_sec); | |
1952 | fr->duration_nsec = ntohl(nfr->duration_nsec); | |
1953 | fr->idle_timeout = ntohs(nfr->idle_timeout); | |
1954 | fr->packet_count = ntohll(nfr->packet_count); | |
1955 | fr->byte_count = ntohll(nfr->byte_count); | |
1956 | } else { | |
1957 | NOT_REACHED(); | |
1958 | } | |
1959 | ||
1960 | return 0; | |
1961 | } | |
1962 | ||
588cd7b5 | 1963 | /* Converts abstract ofputil_flow_removed 'fr' into an OFPT_FLOW_REMOVED or |
27527aa0 | 1964 | * NXT_FLOW_REMOVED message 'oh' according to 'protocol', and returns the |
588cd7b5 BP |
1965 | * message. */ |
1966 | struct ofpbuf * | |
1967 | ofputil_encode_flow_removed(const struct ofputil_flow_removed *fr, | |
27527aa0 | 1968 | enum ofputil_protocol protocol) |
588cd7b5 BP |
1969 | { |
1970 | struct ofpbuf *msg; | |
1971 | ||
27527aa0 BP |
1972 | switch (protocol) { |
1973 | case OFPUTIL_P_OF10: | |
1974 | case OFPUTIL_P_OF10_TID: { | |
588cd7b5 BP |
1975 | struct ofp_flow_removed *ofr; |
1976 | ||
1977 | ofr = make_openflow_xid(sizeof *ofr, OFPT_FLOW_REMOVED, htonl(0), | |
1978 | &msg); | |
b78f6b77 | 1979 | ofputil_cls_rule_to_match(&fr->rule, &ofr->match); |
7fb563b9 | 1980 | ofr->cookie = fr->cookie; |
588cd7b5 BP |
1981 | ofr->priority = htons(fr->rule.priority); |
1982 | ofr->reason = fr->reason; | |
1983 | ofr->duration_sec = htonl(fr->duration_sec); | |
1984 | ofr->duration_nsec = htonl(fr->duration_nsec); | |
1985 | ofr->idle_timeout = htons(fr->idle_timeout); | |
5e9d0469 BP |
1986 | ofr->packet_count = htonll(unknown_to_zero(fr->packet_count)); |
1987 | ofr->byte_count = htonll(unknown_to_zero(fr->byte_count)); | |
27527aa0 BP |
1988 | break; |
1989 | } | |
1990 | ||
1991 | case OFPUTIL_P_NXM: | |
1992 | case OFPUTIL_P_NXM_TID: { | |
588cd7b5 BP |
1993 | struct nx_flow_removed *nfr; |
1994 | int match_len; | |
1995 | ||
1996 | make_nxmsg_xid(sizeof *nfr, NXT_FLOW_REMOVED, htonl(0), &msg); | |
e729e793 | 1997 | match_len = nx_put_match(msg, &fr->rule, 0, 0); |
588cd7b5 BP |
1998 | |
1999 | nfr = msg->data; | |
2000 | nfr->cookie = fr->cookie; | |
2001 | nfr->priority = htons(fr->rule.priority); | |
2002 | nfr->reason = fr->reason; | |
2003 | nfr->duration_sec = htonl(fr->duration_sec); | |
2004 | nfr->duration_nsec = htonl(fr->duration_nsec); | |
2005 | nfr->idle_timeout = htons(fr->idle_timeout); | |
2006 | nfr->match_len = htons(match_len); | |
2007 | nfr->packet_count = htonll(fr->packet_count); | |
2008 | nfr->byte_count = htonll(fr->byte_count); | |
27527aa0 BP |
2009 | break; |
2010 | } | |
2011 | ||
2012 | default: | |
588cd7b5 BP |
2013 | NOT_REACHED(); |
2014 | } | |
2015 | ||
2016 | return msg; | |
2017 | } | |
2018 | ||
65120a8a EJ |
2019 | int |
2020 | ofputil_decode_packet_in(struct ofputil_packet_in *pin, | |
2021 | const struct ofp_header *oh) | |
2022 | { | |
2023 | const struct ofputil_msg_type *type; | |
2024 | enum ofputil_msg_code code; | |
2025 | ||
2026 | ofputil_decode_msg_type(oh, &type); | |
2027 | code = ofputil_msg_type_code(type); | |
2028 | memset(pin, 0, sizeof *pin); | |
2029 | ||
2030 | if (code == OFPUTIL_OFPT_PACKET_IN) { | |
2031 | const struct ofp_packet_in *opi = (const struct ofp_packet_in *) oh; | |
2032 | ||
2033 | pin->packet = opi->data; | |
2034 | pin->packet_len = ntohs(opi->header.length) | |
2035 | - offsetof(struct ofp_packet_in, data); | |
2036 | ||
5d6c3af0 | 2037 | pin->fmd.in_port = ntohs(opi->in_port); |
65120a8a EJ |
2038 | pin->reason = opi->reason; |
2039 | pin->buffer_id = ntohl(opi->buffer_id); | |
2040 | pin->total_len = ntohs(opi->total_len); | |
54834960 | 2041 | } else if (code == OFPUTIL_NXT_PACKET_IN) { |
73dbf4ab | 2042 | const struct nx_packet_in *npi; |
54834960 EJ |
2043 | struct cls_rule rule; |
2044 | struct ofpbuf b; | |
2045 | int error; | |
2046 | ||
2047 | ofpbuf_use_const(&b, oh, ntohs(oh->length)); | |
2048 | ||
2049 | npi = ofpbuf_pull(&b, sizeof *npi); | |
2050 | error = nx_pull_match_loose(&b, ntohs(npi->match_len), 0, &rule, NULL, | |
2051 | NULL); | |
2052 | if (error) { | |
2053 | return error; | |
2054 | } | |
2055 | ||
2056 | if (!ofpbuf_try_pull(&b, 2)) { | |
90bf1e07 | 2057 | return OFPERR_OFPBRC_BAD_LEN; |
54834960 EJ |
2058 | } |
2059 | ||
2060 | pin->packet = b.data; | |
2061 | pin->packet_len = b.size; | |
2062 | pin->reason = npi->reason; | |
2063 | pin->table_id = npi->table_id; | |
2064 | pin->cookie = npi->cookie; | |
2065 | ||
2066 | pin->fmd.in_port = rule.flow.in_port; | |
2067 | ||
2068 | pin->fmd.tun_id = rule.flow.tun_id; | |
2069 | pin->fmd.tun_id_mask = rule.wc.tun_id_mask; | |
2070 | ||
2071 | memcpy(pin->fmd.regs, rule.flow.regs, sizeof pin->fmd.regs); | |
2072 | memcpy(pin->fmd.reg_masks, rule.wc.reg_masks, | |
2073 | sizeof pin->fmd.reg_masks); | |
2074 | ||
2075 | pin->buffer_id = ntohl(npi->buffer_id); | |
2076 | pin->total_len = ntohs(npi->total_len); | |
65120a8a EJ |
2077 | } else { |
2078 | NOT_REACHED(); | |
2079 | } | |
2080 | ||
2081 | return 0; | |
2082 | } | |
2083 | ||
54834960 EJ |
2084 | /* Converts abstract ofputil_packet_in 'pin' into a PACKET_IN message |
2085 | * in the format specified by 'packet_in_format'. */ | |
ebb57021 | 2086 | struct ofpbuf * |
54834960 EJ |
2087 | ofputil_encode_packet_in(const struct ofputil_packet_in *pin, |
2088 | enum nx_packet_in_format packet_in_format) | |
ebb57021 | 2089 | { |
54834960 EJ |
2090 | size_t send_len = MIN(pin->send_len, pin->packet_len); |
2091 | struct ofpbuf *packet; | |
ebb57021 BP |
2092 | |
2093 | /* Add OFPT_PACKET_IN. */ | |
54834960 EJ |
2094 | if (packet_in_format == NXPIF_OPENFLOW10) { |
2095 | size_t header_len = offsetof(struct ofp_packet_in, data); | |
2096 | struct ofp_packet_in *opi; | |
2097 | ||
2098 | packet = ofpbuf_new(send_len + header_len); | |
2099 | opi = ofpbuf_put_zeros(packet, header_len); | |
87ea5e5e | 2100 | opi->header.version = OFP10_VERSION; |
54834960 EJ |
2101 | opi->header.type = OFPT_PACKET_IN; |
2102 | opi->total_len = htons(pin->total_len); | |
2103 | opi->in_port = htons(pin->fmd.in_port); | |
2104 | opi->reason = pin->reason; | |
2105 | opi->buffer_id = htonl(pin->buffer_id); | |
2106 | ||
2107 | ofpbuf_put(packet, pin->packet, send_len); | |
2108 | } else if (packet_in_format == NXPIF_NXM) { | |
73dbf4ab | 2109 | struct nx_packet_in *npi; |
54834960 EJ |
2110 | struct cls_rule rule; |
2111 | size_t match_len; | |
2112 | size_t i; | |
2113 | ||
2114 | /* Estimate of required PACKET_IN length includes the NPI header, space | |
2115 | * for the match (2 times sizeof the metadata seems like enough), 2 | |
2116 | * bytes for padding, and the packet length. */ | |
2117 | packet = ofpbuf_new(sizeof *npi + sizeof(struct flow_metadata) * 2 | |
2118 | + 2 + send_len); | |
2119 | ||
2120 | cls_rule_init_catchall(&rule, 0); | |
2121 | cls_rule_set_tun_id_masked(&rule, pin->fmd.tun_id, | |
2122 | pin->fmd.tun_id_mask); | |
2123 | ||
2124 | for (i = 0; i < FLOW_N_REGS; i++) { | |
2125 | cls_rule_set_reg_masked(&rule, i, pin->fmd.regs[i], | |
2126 | pin->fmd.reg_masks[i]); | |
2127 | } | |
2128 | ||
2129 | cls_rule_set_in_port(&rule, pin->fmd.in_port); | |
2130 | ||
2131 | ofpbuf_put_zeros(packet, sizeof *npi); | |
2132 | match_len = nx_put_match(packet, &rule, 0, 0); | |
2133 | ofpbuf_put_zeros(packet, 2); | |
2134 | ofpbuf_put(packet, pin->packet, send_len); | |
2135 | ||
2136 | npi = packet->data; | |
87ea5e5e | 2137 | npi->nxh.header.version = OFP10_VERSION; |
54834960 EJ |
2138 | npi->nxh.header.type = OFPT_VENDOR; |
2139 | npi->nxh.vendor = htonl(NX_VENDOR_ID); | |
2140 | npi->nxh.subtype = htonl(NXT_PACKET_IN); | |
2141 | ||
2142 | npi->buffer_id = htonl(pin->buffer_id); | |
2143 | npi->total_len = htons(pin->total_len); | |
2144 | npi->reason = pin->reason; | |
2145 | npi->table_id = pin->table_id; | |
2146 | npi->cookie = pin->cookie; | |
2147 | npi->match_len = htons(match_len); | |
2148 | } else { | |
2149 | NOT_REACHED(); | |
2150 | } | |
2151 | update_openflow_length(packet); | |
2152 | ||
2153 | return packet; | |
ebb57021 BP |
2154 | } |
2155 | ||
7c1a76a4 BP |
2156 | const char * |
2157 | ofputil_packet_in_reason_to_string(enum ofp_packet_in_reason reason) | |
2158 | { | |
2159 | static char s[INT_STRLEN(int) + 1]; | |
2160 | ||
2161 | switch (reason) { | |
2162 | case OFPR_NO_MATCH: | |
2163 | return "no_match"; | |
2164 | case OFPR_ACTION: | |
2165 | return "action"; | |
2166 | case OFPR_INVALID_TTL: | |
2167 | return "invalid_ttl"; | |
2168 | ||
2169 | case OFPR_N_REASONS: | |
2170 | default: | |
2171 | sprintf(s, "%d", (int) reason); | |
2172 | return s; | |
2173 | } | |
2174 | } | |
2175 | ||
2176 | bool | |
2177 | ofputil_packet_in_reason_from_string(const char *s, | |
2178 | enum ofp_packet_in_reason *reason) | |
2179 | { | |
2180 | int i; | |
2181 | ||
2182 | for (i = 0; i < OFPR_N_REASONS; i++) { | |
2183 | if (!strcasecmp(s, ofputil_packet_in_reason_to_string(i))) { | |
2184 | *reason = i; | |
2185 | return true; | |
2186 | } | |
2187 | } | |
2188 | return false; | |
2189 | } | |
2190 | ||
c6a93eb7 BP |
2191 | enum ofperr |
2192 | ofputil_decode_packet_out(struct ofputil_packet_out *po, | |
2193 | const struct ofp_packet_out *opo) | |
2194 | { | |
2195 | enum ofperr error; | |
2196 | struct ofpbuf b; | |
2197 | ||
2198 | po->buffer_id = ntohl(opo->buffer_id); | |
2199 | po->in_port = ntohs(opo->in_port); | |
2200 | if (po->in_port >= OFPP_MAX && po->in_port != OFPP_LOCAL | |
2201 | && po->in_port != OFPP_NONE) { | |
2202 | VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out has bad input port %#"PRIx16, | |
2203 | po->in_port); | |
2204 | return OFPERR_NXBRC_BAD_IN_PORT; | |
2205 | } | |
2206 | ||
2207 | ofpbuf_use_const(&b, opo, ntohs(opo->header.length)); | |
2208 | ofpbuf_pull(&b, sizeof *opo); | |
2209 | ||
2210 | error = ofputil_pull_actions(&b, ntohs(opo->actions_len), | |
2211 | &po->actions, &po->n_actions); | |
2212 | if (error) { | |
2213 | return error; | |
2214 | } | |
2215 | ||
2216 | if (po->buffer_id == UINT32_MAX) { | |
2217 | po->packet = b.data; | |
2218 | po->packet_len = b.size; | |
2219 | } else { | |
2220 | po->packet = NULL; | |
2221 | po->packet_len = 0; | |
2222 | } | |
2223 | ||
2224 | return 0; | |
2225 | } | |
2226 | ||
2227 | struct ofpbuf * | |
2228 | ofputil_encode_packet_out(const struct ofputil_packet_out *po) | |
2229 | { | |
2230 | struct ofp_packet_out *opo; | |
2231 | size_t actions_len; | |
2232 | struct ofpbuf *msg; | |
2233 | size_t size; | |
2234 | ||
2235 | actions_len = po->n_actions * sizeof *po->actions; | |
2236 | size = sizeof *opo + actions_len; | |
2237 | if (po->buffer_id == UINT32_MAX) { | |
2238 | size += po->packet_len; | |
2239 | } | |
2240 | ||
2241 | msg = ofpbuf_new(size); | |
5293a2e1 | 2242 | opo = put_openflow(sizeof *opo, OFPT10_PACKET_OUT, msg); |
c6a93eb7 BP |
2243 | opo->buffer_id = htonl(po->buffer_id); |
2244 | opo->in_port = htons(po->in_port); | |
2245 | opo->actions_len = htons(actions_len); | |
2246 | ofpbuf_put(msg, po->actions, actions_len); | |
2247 | if (po->buffer_id == UINT32_MAX) { | |
2248 | ofpbuf_put(msg, po->packet, po->packet_len); | |
2249 | } | |
2250 | update_openflow_length(msg); | |
2251 | ||
2252 | return msg; | |
2253 | } | |
2254 | ||
d1e2cf21 BP |
2255 | /* Returns a string representing the message type of 'type'. The string is the |
2256 | * enumeration constant for the type, e.g. "OFPT_HELLO". For statistics | |
2257 | * messages, the constant is followed by "request" or "reply", | |
2258 | * e.g. "OFPST_AGGREGATE reply". */ | |
2259 | const char * | |
2260 | ofputil_msg_type_name(const struct ofputil_msg_type *type) | |
2261 | { | |
2262 | return type->name; | |
2263 | } | |
2264 | \f | |
fa37b408 BP |
2265 | /* Allocates and stores in '*bufferp' a new ofpbuf with a size of |
2266 | * 'openflow_len', starting with an OpenFlow header with the given 'type' and | |
2267 | * an arbitrary transaction id. Allocated bytes beyond the header, if any, are | |
2268 | * zeroed. | |
2269 | * | |
2270 | * The caller is responsible for freeing '*bufferp' when it is no longer | |
2271 | * needed. | |
2272 | * | |
2273 | * The OpenFlow header length is initially set to 'openflow_len'; if the | |
2274 | * message is later extended, the length should be updated with | |
2275 | * update_openflow_length() before sending. | |
2276 | * | |
2277 | * Returns the header. */ | |
2278 | void * | |
2279 | make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **bufferp) | |
2280 | { | |
2281 | *bufferp = ofpbuf_new(openflow_len); | |
2282 | return put_openflow_xid(openflow_len, type, alloc_xid(), *bufferp); | |
2283 | } | |
2284 | ||
0bd0c660 BP |
2285 | /* Similar to make_openflow() but creates a Nicira vendor extension message |
2286 | * with the specific 'subtype'. 'subtype' should be in host byte order. */ | |
2287 | void * | |
2288 | make_nxmsg(size_t openflow_len, uint32_t subtype, struct ofpbuf **bufferp) | |
2289 | { | |
2290 | return make_nxmsg_xid(openflow_len, subtype, alloc_xid(), bufferp); | |
2291 | } | |
2292 | ||
fa37b408 BP |
2293 | /* Allocates and stores in '*bufferp' a new ofpbuf with a size of |
2294 | * 'openflow_len', starting with an OpenFlow header with the given 'type' and | |
2295 | * transaction id 'xid'. Allocated bytes beyond the header, if any, are | |
2296 | * zeroed. | |
2297 | * | |
2298 | * The caller is responsible for freeing '*bufferp' when it is no longer | |
2299 | * needed. | |
2300 | * | |
2301 | * The OpenFlow header length is initially set to 'openflow_len'; if the | |
2302 | * message is later extended, the length should be updated with | |
2303 | * update_openflow_length() before sending. | |
2304 | * | |
2305 | * Returns the header. */ | |
2306 | void * | |
44381c1b | 2307 | make_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid, |
fa37b408 BP |
2308 | struct ofpbuf **bufferp) |
2309 | { | |
2310 | *bufferp = ofpbuf_new(openflow_len); | |
2311 | return put_openflow_xid(openflow_len, type, xid, *bufferp); | |
2312 | } | |
2313 | ||
0bd0c660 BP |
2314 | /* Similar to make_openflow_xid() but creates a Nicira vendor extension message |
2315 | * with the specific 'subtype'. 'subtype' should be in host byte order. */ | |
2316 | void * | |
44381c1b | 2317 | make_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid, |
0bd0c660 BP |
2318 | struct ofpbuf **bufferp) |
2319 | { | |
dfdfc8d4 BP |
2320 | *bufferp = ofpbuf_new(openflow_len); |
2321 | return put_nxmsg_xid(openflow_len, subtype, xid, *bufferp); | |
0bd0c660 BP |
2322 | } |
2323 | ||
fa37b408 BP |
2324 | /* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header |
2325 | * with the given 'type' and an arbitrary transaction id. Allocated bytes | |
2326 | * beyond the header, if any, are zeroed. | |
2327 | * | |
2328 | * The OpenFlow header length is initially set to 'openflow_len'; if the | |
2329 | * message is later extended, the length should be updated with | |
2330 | * update_openflow_length() before sending. | |
2331 | * | |
2332 | * Returns the header. */ | |
2333 | void * | |
2334 | put_openflow(size_t openflow_len, uint8_t type, struct ofpbuf *buffer) | |
2335 | { | |
2336 | return put_openflow_xid(openflow_len, type, alloc_xid(), buffer); | |
2337 | } | |
2338 | ||
2339 | /* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header | |
2340 | * with the given 'type' and an transaction id 'xid'. Allocated bytes beyond | |
2341 | * the header, if any, are zeroed. | |
2342 | * | |
2343 | * The OpenFlow header length is initially set to 'openflow_len'; if the | |
2344 | * message is later extended, the length should be updated with | |
2345 | * update_openflow_length() before sending. | |
2346 | * | |
2347 | * Returns the header. */ | |
2348 | void * | |
44381c1b | 2349 | put_openflow_xid(size_t openflow_len, uint8_t type, ovs_be32 xid, |
fa37b408 BP |
2350 | struct ofpbuf *buffer) |
2351 | { | |
2352 | struct ofp_header *oh; | |
2353 | ||
2354 | assert(openflow_len >= sizeof *oh); | |
2355 | assert(openflow_len <= UINT16_MAX); | |
2356 | ||
2357 | oh = ofpbuf_put_uninit(buffer, openflow_len); | |
87ea5e5e | 2358 | oh->version = OFP10_VERSION; |
fa37b408 BP |
2359 | oh->type = type; |
2360 | oh->length = htons(openflow_len); | |
2361 | oh->xid = xid; | |
2362 | memset(oh + 1, 0, openflow_len - sizeof *oh); | |
2363 | return oh; | |
2364 | } | |
2365 | ||
dfdfc8d4 BP |
2366 | /* Similar to put_openflow() but append a Nicira vendor extension message with |
2367 | * the specific 'subtype'. 'subtype' should be in host byte order. */ | |
2368 | void * | |
2369 | put_nxmsg(size_t openflow_len, uint32_t subtype, struct ofpbuf *buffer) | |
2370 | { | |
2371 | return put_nxmsg_xid(openflow_len, subtype, alloc_xid(), buffer); | |
2372 | } | |
2373 | ||
2374 | /* Similar to put_openflow_xid() but append a Nicira vendor extension message | |
2375 | * with the specific 'subtype'. 'subtype' should be in host byte order. */ | |
2376 | void * | |
2377 | put_nxmsg_xid(size_t openflow_len, uint32_t subtype, ovs_be32 xid, | |
2378 | struct ofpbuf *buffer) | |
2379 | { | |
2380 | struct nicira_header *nxh; | |
2381 | ||
2382 | nxh = put_openflow_xid(openflow_len, OFPT_VENDOR, xid, buffer); | |
2383 | nxh->vendor = htonl(NX_VENDOR_ID); | |
2384 | nxh->subtype = htonl(subtype); | |
2385 | return nxh; | |
2386 | } | |
2387 | ||
fa37b408 BP |
2388 | /* Updates the 'length' field of the OpenFlow message in 'buffer' to |
2389 | * 'buffer->size'. */ | |
2390 | void | |
d295e8e9 | 2391 | update_openflow_length(struct ofpbuf *buffer) |
fa37b408 BP |
2392 | { |
2393 | struct ofp_header *oh = ofpbuf_at_assert(buffer, 0, sizeof *oh); | |
d295e8e9 | 2394 | oh->length = htons(buffer->size); |
fa37b408 BP |
2395 | } |
2396 | ||
63f2140a BP |
2397 | static void |
2398 | put_stats__(ovs_be32 xid, uint8_t ofp_type, | |
2399 | ovs_be16 ofpst_type, ovs_be32 nxst_subtype, | |
2400 | struct ofpbuf *msg) | |
2401 | { | |
2402 | if (ofpst_type == htons(OFPST_VENDOR)) { | |
2403 | struct nicira_stats_msg *nsm; | |
2404 | ||
2405 | nsm = put_openflow_xid(sizeof *nsm, ofp_type, xid, msg); | |
2406 | nsm->vsm.osm.type = ofpst_type; | |
2407 | nsm->vsm.vendor = htonl(NX_VENDOR_ID); | |
2408 | nsm->subtype = nxst_subtype; | |
2409 | } else { | |
2410 | struct ofp_stats_msg *osm; | |
2411 | ||
2412 | osm = put_openflow_xid(sizeof *osm, ofp_type, xid, msg); | |
2413 | osm->type = ofpst_type; | |
2414 | } | |
2415 | } | |
2416 | ||
2417 | /* Creates a statistics request message with total length 'openflow_len' | |
2418 | * (including all headers) and the given 'ofpst_type', and stores the buffer | |
2419 | * containing the new message in '*bufferp'. If 'ofpst_type' is OFPST_VENDOR | |
2420 | * then 'nxst_subtype' is used as the Nicira vendor extension statistics | |
2421 | * subtype (otherwise 'nxst_subtype' is ignored). | |
2422 | * | |
2423 | * Initializes bytes following the headers to all-bits-zero. | |
2424 | * | |
2425 | * Returns the first byte of the new message. */ | |
dfdfc8d4 | 2426 | void * |
63f2140a BP |
2427 | ofputil_make_stats_request(size_t openflow_len, uint16_t ofpst_type, |
2428 | uint32_t nxst_subtype, struct ofpbuf **bufferp) | |
dfdfc8d4 | 2429 | { |
63f2140a BP |
2430 | struct ofpbuf *msg; |
2431 | ||
2432 | msg = *bufferp = ofpbuf_new(openflow_len); | |
5293a2e1 | 2433 | put_stats__(alloc_xid(), OFPT10_STATS_REQUEST, |
63f2140a BP |
2434 | htons(ofpst_type), htonl(nxst_subtype), msg); |
2435 | ofpbuf_padto(msg, openflow_len); | |
2436 | ||
2437 | return msg->data; | |
2438 | } | |
2439 | ||
2440 | static void | |
2441 | put_stats_reply__(const struct ofp_stats_msg *request, struct ofpbuf *msg) | |
2442 | { | |
5293a2e1 BP |
2443 | assert(request->header.type == OFPT10_STATS_REQUEST || |
2444 | request->header.type == OFPT10_STATS_REPLY); | |
2445 | put_stats__(request->header.xid, OFPT10_STATS_REPLY, request->type, | |
63f2140a BP |
2446 | (request->type != htons(OFPST_VENDOR) |
2447 | ? htonl(0) | |
2448 | : ((const struct nicira_stats_msg *) request)->subtype), | |
2449 | msg); | |
2450 | } | |
2451 | ||
2452 | /* Creates a statistics reply message with total length 'openflow_len' | |
2453 | * (including all headers) and the same type (either a standard OpenFlow | |
2454 | * statistics type or a Nicira extension type and subtype) as 'request', and | |
2455 | * stores the buffer containing the new message in '*bufferp'. | |
2456 | * | |
2457 | * Initializes bytes following the headers to all-bits-zero. | |
2458 | * | |
2459 | * Returns the first byte of the new message. */ | |
2460 | void * | |
2461 | ofputil_make_stats_reply(size_t openflow_len, | |
2462 | const struct ofp_stats_msg *request, | |
2463 | struct ofpbuf **bufferp) | |
2464 | { | |
2465 | struct ofpbuf *msg; | |
2466 | ||
2467 | msg = *bufferp = ofpbuf_new(openflow_len); | |
2468 | put_stats_reply__(request, msg); | |
2469 | ofpbuf_padto(msg, openflow_len); | |
2470 | ||
2471 | return msg->data; | |
2472 | } | |
2473 | ||
2474 | /* Initializes 'replies' as a list of ofpbufs that will contain a series of | |
2475 | * replies to 'request', which should be an OpenFlow or Nicira extension | |
2476 | * statistics request. Initially 'replies' will have a single reply message | |
2477 | * that has only a header. The functions ofputil_reserve_stats_reply() and | |
2478 | * ofputil_append_stats_reply() may be used to add to the reply. */ | |
2479 | void | |
2480 | ofputil_start_stats_reply(const struct ofp_stats_msg *request, | |
2481 | struct list *replies) | |
2482 | { | |
2483 | struct ofpbuf *msg; | |
2484 | ||
2485 | msg = ofpbuf_new(1024); | |
2486 | put_stats_reply__(request, msg); | |
2487 | ||
2488 | list_init(replies); | |
2489 | list_push_back(replies, &msg->list_node); | |
2490 | } | |
2491 | ||
2492 | /* Prepares to append up to 'len' bytes to the series of statistics replies in | |
2493 | * 'replies', which should have been initialized with | |
2494 | * ofputil_start_stats_reply(). Returns an ofpbuf with at least 'len' bytes of | |
2495 | * tailroom. (The 'len' bytes have not actually be allocated; the caller must | |
2496 | * do so with e.g. ofpbuf_put_uninit().) */ | |
2497 | struct ofpbuf * | |
2498 | ofputil_reserve_stats_reply(size_t len, struct list *replies) | |
2499 | { | |
2500 | struct ofpbuf *msg = ofpbuf_from_list(list_back(replies)); | |
2501 | struct ofp_stats_msg *osm = msg->data; | |
2502 | ||
2503 | if (msg->size + len <= UINT16_MAX) { | |
2504 | ofpbuf_prealloc_tailroom(msg, len); | |
2505 | } else { | |
2506 | osm->flags |= htons(OFPSF_REPLY_MORE); | |
2507 | ||
2508 | msg = ofpbuf_new(MAX(1024, sizeof(struct nicira_stats_msg) + len)); | |
2509 | put_stats_reply__(osm, msg); | |
2510 | list_push_back(replies, &msg->list_node); | |
2511 | } | |
2512 | return msg; | |
dfdfc8d4 BP |
2513 | } |
2514 | ||
63f2140a BP |
2515 | /* Appends 'len' bytes to the series of statistics replies in 'replies', and |
2516 | * returns the first byte. */ | |
dfdfc8d4 | 2517 | void * |
63f2140a | 2518 | ofputil_append_stats_reply(size_t len, struct list *replies) |
dfdfc8d4 | 2519 | { |
63f2140a | 2520 | return ofpbuf_put_uninit(ofputil_reserve_stats_reply(len, replies), len); |
dfdfc8d4 BP |
2521 | } |
2522 | ||
03cd3493 | 2523 | /* Returns the first byte past the ofp_stats_msg header in 'oh'. */ |
d1e2cf21 BP |
2524 | const void * |
2525 | ofputil_stats_body(const struct ofp_header *oh) | |
2526 | { | |
5293a2e1 | 2527 | assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY); |
28c8bad1 | 2528 | return (const struct ofp_stats_msg *) oh + 1; |
d1e2cf21 BP |
2529 | } |
2530 | ||
03cd3493 | 2531 | /* Returns the number of bytes past the ofp_stats_msg header in 'oh'. */ |
d1e2cf21 BP |
2532 | size_t |
2533 | ofputil_stats_body_len(const struct ofp_header *oh) | |
2534 | { | |
5293a2e1 | 2535 | assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY); |
28c8bad1 | 2536 | return ntohs(oh->length) - sizeof(struct ofp_stats_msg); |
d1e2cf21 BP |
2537 | } |
2538 | ||
03cd3493 | 2539 | /* Returns the first byte past the nicira_stats_msg header in 'oh'. */ |
c6430da5 BP |
2540 | const void * |
2541 | ofputil_nxstats_body(const struct ofp_header *oh) | |
2542 | { | |
5293a2e1 | 2543 | assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY); |
c6430da5 BP |
2544 | return ((const struct nicira_stats_msg *) oh) + 1; |
2545 | } | |
2546 | ||
03cd3493 | 2547 | /* Returns the number of bytes past the nicira_stats_msg header in 'oh'. */ |
c6430da5 BP |
2548 | size_t |
2549 | ofputil_nxstats_body_len(const struct ofp_header *oh) | |
2550 | { | |
5293a2e1 | 2551 | assert(oh->type == OFPT10_STATS_REQUEST || oh->type == OFPT10_STATS_REPLY); |
c6430da5 BP |
2552 | return ntohs(oh->length) - sizeof(struct nicira_stats_msg); |
2553 | } | |
2554 | ||
fa37b408 | 2555 | struct ofpbuf * |
daa68e9f BP |
2556 | make_flow_mod(uint16_t command, const struct cls_rule *rule, |
2557 | size_t actions_len) | |
fa37b408 BP |
2558 | { |
2559 | struct ofp_flow_mod *ofm; | |
2560 | size_t size = sizeof *ofm + actions_len; | |
2561 | struct ofpbuf *out = ofpbuf_new(size); | |
2562 | ofm = ofpbuf_put_zeros(out, sizeof *ofm); | |
87ea5e5e | 2563 | ofm->header.version = OFP10_VERSION; |
5293a2e1 | 2564 | ofm->header.type = OFPT10_FLOW_MOD; |
fa37b408 BP |
2565 | ofm->header.length = htons(size); |
2566 | ofm->cookie = 0; | |
daa68e9f | 2567 | ofm->priority = htons(MIN(rule->priority, UINT16_MAX)); |
b78f6b77 | 2568 | ofputil_cls_rule_to_match(rule, &ofm->match); |
fa37b408 BP |
2569 | ofm->command = htons(command); |
2570 | return out; | |
2571 | } | |
2572 | ||
2573 | struct ofpbuf * | |
daa68e9f | 2574 | make_add_flow(const struct cls_rule *rule, uint32_t buffer_id, |
fa37b408 BP |
2575 | uint16_t idle_timeout, size_t actions_len) |
2576 | { | |
daa68e9f | 2577 | struct ofpbuf *out = make_flow_mod(OFPFC_ADD, rule, actions_len); |
fa37b408 BP |
2578 | struct ofp_flow_mod *ofm = out->data; |
2579 | ofm->idle_timeout = htons(idle_timeout); | |
2580 | ofm->hard_timeout = htons(OFP_FLOW_PERMANENT); | |
2581 | ofm->buffer_id = htonl(buffer_id); | |
2582 | return out; | |
2583 | } | |
2584 | ||
2585 | struct ofpbuf * | |
daa68e9f | 2586 | make_del_flow(const struct cls_rule *rule) |
fa37b408 | 2587 | { |
daa68e9f | 2588 | struct ofpbuf *out = make_flow_mod(OFPFC_DELETE_STRICT, rule, 0); |
fa37b408 BP |
2589 | struct ofp_flow_mod *ofm = out->data; |
2590 | ofm->out_port = htons(OFPP_NONE); | |
2591 | return out; | |
2592 | } | |
2593 | ||
2594 | struct ofpbuf * | |
daa68e9f | 2595 | make_add_simple_flow(const struct cls_rule *rule, |
fa37b408 BP |
2596 | uint32_t buffer_id, uint16_t out_port, |
2597 | uint16_t idle_timeout) | |
2598 | { | |
81f3cad4 BP |
2599 | if (out_port != OFPP_NONE) { |
2600 | struct ofp_action_output *oao; | |
2601 | struct ofpbuf *buffer; | |
2602 | ||
daa68e9f | 2603 | buffer = make_add_flow(rule, buffer_id, idle_timeout, sizeof *oao); |
93996add | 2604 | ofputil_put_OFPAT_OUTPUT(buffer)->port = htons(out_port); |
81f3cad4 BP |
2605 | return buffer; |
2606 | } else { | |
daa68e9f | 2607 | return make_add_flow(rule, buffer_id, idle_timeout, 0); |
81f3cad4 | 2608 | } |
fa37b408 BP |
2609 | } |
2610 | ||
2611 | struct ofpbuf * | |
2612 | make_packet_in(uint32_t buffer_id, uint16_t in_port, uint8_t reason, | |
2613 | const struct ofpbuf *payload, int max_send_len) | |
2614 | { | |
2615 | struct ofp_packet_in *opi; | |
2616 | struct ofpbuf *buf; | |
2617 | int send_len; | |
2618 | ||
2619 | send_len = MIN(max_send_len, payload->size); | |
2620 | buf = ofpbuf_new(sizeof *opi + send_len); | |
2621 | opi = put_openflow_xid(offsetof(struct ofp_packet_in, data), | |
2622 | OFPT_PACKET_IN, 0, buf); | |
2623 | opi->buffer_id = htonl(buffer_id); | |
2624 | opi->total_len = htons(payload->size); | |
2625 | opi->in_port = htons(in_port); | |
2626 | opi->reason = reason; | |
2627 | ofpbuf_put(buf, payload->data, send_len); | |
2628 | update_openflow_length(buf); | |
2629 | ||
2630 | return buf; | |
2631 | } | |
2632 | ||
fa37b408 BP |
2633 | /* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */ |
2634 | struct ofpbuf * | |
2635 | make_echo_request(void) | |
2636 | { | |
2637 | struct ofp_header *rq; | |
2638 | struct ofpbuf *out = ofpbuf_new(sizeof *rq); | |
2639 | rq = ofpbuf_put_uninit(out, sizeof *rq); | |
87ea5e5e | 2640 | rq->version = OFP10_VERSION; |
fa37b408 BP |
2641 | rq->type = OFPT_ECHO_REQUEST; |
2642 | rq->length = htons(sizeof *rq); | |
44381c1b | 2643 | rq->xid = htonl(0); |
fa37b408 BP |
2644 | return out; |
2645 | } | |
2646 | ||
2647 | /* Creates and returns an OFPT_ECHO_REPLY message matching the | |
2648 | * OFPT_ECHO_REQUEST message in 'rq'. */ | |
2649 | struct ofpbuf * | |
2650 | make_echo_reply(const struct ofp_header *rq) | |
2651 | { | |
2652 | size_t size = ntohs(rq->length); | |
2653 | struct ofpbuf *out = ofpbuf_new(size); | |
2654 | struct ofp_header *reply = ofpbuf_put(out, rq, size); | |
2655 | reply->type = OFPT_ECHO_REPLY; | |
2656 | return out; | |
2657 | } | |
2658 | ||
efb80167 BP |
2659 | struct ofpbuf * |
2660 | ofputil_encode_barrier_request(void) | |
2661 | { | |
2662 | struct ofpbuf *msg; | |
2663 | ||
5293a2e1 | 2664 | make_openflow(sizeof(struct ofp_header), OFPT10_BARRIER_REQUEST, &msg); |
efb80167 BP |
2665 | return msg; |
2666 | } | |
2667 | ||
7257b535 BP |
2668 | const char * |
2669 | ofputil_frag_handling_to_string(enum ofp_config_flags flags) | |
2670 | { | |
2671 | switch (flags & OFPC_FRAG_MASK) { | |
2672 | case OFPC_FRAG_NORMAL: return "normal"; | |
2673 | case OFPC_FRAG_DROP: return "drop"; | |
2674 | case OFPC_FRAG_REASM: return "reassemble"; | |
2675 | case OFPC_FRAG_NX_MATCH: return "nx-match"; | |
2676 | } | |
2677 | ||
2678 | NOT_REACHED(); | |
2679 | } | |
2680 | ||
2681 | bool | |
2682 | ofputil_frag_handling_from_string(const char *s, enum ofp_config_flags *flags) | |
2683 | { | |
2684 | if (!strcasecmp(s, "normal")) { | |
2685 | *flags = OFPC_FRAG_NORMAL; | |
2686 | } else if (!strcasecmp(s, "drop")) { | |
2687 | *flags = OFPC_FRAG_DROP; | |
2688 | } else if (!strcasecmp(s, "reassemble")) { | |
2689 | *flags = OFPC_FRAG_REASM; | |
2690 | } else if (!strcasecmp(s, "nx-match")) { | |
2691 | *flags = OFPC_FRAG_NX_MATCH; | |
2692 | } else { | |
2693 | return false; | |
2694 | } | |
2695 | return true; | |
2696 | } | |
2697 | ||
7b7503ea BP |
2698 | /* Converts the OpenFlow 1.1+ port number 'ofp11_port' into an OpenFlow 1.0 |
2699 | * port number and stores the latter in '*ofp10_port', for the purpose of | |
2700 | * decoding OpenFlow 1.1+ protocol messages. Returns 0 if successful, | |
2701 | * otherwise an OFPERR_* number. | |
2702 | * | |
2703 | * See the definition of OFP11_MAX for an explanation of the mapping. */ | |
2704 | enum ofperr | |
2705 | ofputil_port_from_ofp11(ovs_be32 ofp11_port, uint16_t *ofp10_port) | |
2706 | { | |
2707 | uint32_t ofp11_port_h = ntohl(ofp11_port); | |
2708 | ||
2709 | if (ofp11_port_h < OFPP_MAX) { | |
2710 | *ofp10_port = ofp11_port_h; | |
2711 | return 0; | |
2712 | } else if (ofp11_port_h >= OFPP11_MAX) { | |
2713 | *ofp10_port = ofp11_port_h - OFPP11_OFFSET; | |
2714 | return 0; | |
2715 | } else { | |
2716 | VLOG_WARN_RL(&bad_ofmsg_rl, "port %"PRIu32" is outside the supported " | |
2717 | "range 0 through %d or 0x%"PRIx32" through 0x%"PRIx32, | |
2718 | ofp11_port_h, OFPP_MAX - 1, | |
2719 | (uint32_t) OFPP11_MAX, UINT32_MAX); | |
2720 | return OFPERR_OFPBAC_BAD_OUT_PORT; | |
2721 | } | |
2722 | } | |
2723 | ||
2724 | /* Returns the OpenFlow 1.1+ port number equivalent to the OpenFlow 1.0 port | |
2725 | * number 'ofp10_port', for encoding OpenFlow 1.1+ protocol messages. | |
2726 | * | |
2727 | * See the definition of OFP11_MAX for an explanation of the mapping. */ | |
2728 | ovs_be32 | |
2729 | ofputil_port_to_ofp11(uint16_t ofp10_port) | |
2730 | { | |
2731 | return htonl(ofp10_port < OFPP_MAX | |
2732 | ? ofp10_port | |
2733 | : ofp10_port + OFPP11_OFFSET); | |
2734 | } | |
2735 | ||
c1c9c9c4 BP |
2736 | /* Checks that 'port' is a valid output port for the OFPAT_OUTPUT action, given |
2737 | * that the switch will never have more than 'max_ports' ports. Returns 0 if | |
90bf1e07 BP |
2738 | * 'port' is valid, otherwise an OpenFlow return code. */ |
2739 | enum ofperr | |
77410139 | 2740 | ofputil_check_output_port(uint16_t port, int max_ports) |
fa37b408 BP |
2741 | { |
2742 | switch (port) { | |
2743 | case OFPP_IN_PORT: | |
2744 | case OFPP_TABLE: | |
2745 | case OFPP_NORMAL: | |
2746 | case OFPP_FLOOD: | |
2747 | case OFPP_ALL: | |
2748 | case OFPP_CONTROLLER: | |
2749 | case OFPP_LOCAL: | |
2750 | return 0; | |
2751 | ||
2752 | default: | |
c1c9c9c4 | 2753 | if (port < max_ports) { |
fa37b408 BP |
2754 | return 0; |
2755 | } | |
90bf1e07 | 2756 | return OFPERR_OFPBAC_BAD_OUT_PORT; |
fa37b408 BP |
2757 | } |
2758 | } | |
2759 | ||
39dc9082 BP |
2760 | #define OFPUTIL_NAMED_PORTS \ |
2761 | OFPUTIL_NAMED_PORT(IN_PORT) \ | |
2762 | OFPUTIL_NAMED_PORT(TABLE) \ | |
2763 | OFPUTIL_NAMED_PORT(NORMAL) \ | |
2764 | OFPUTIL_NAMED_PORT(FLOOD) \ | |
2765 | OFPUTIL_NAMED_PORT(ALL) \ | |
2766 | OFPUTIL_NAMED_PORT(CONTROLLER) \ | |
2767 | OFPUTIL_NAMED_PORT(LOCAL) \ | |
2768 | OFPUTIL_NAMED_PORT(NONE) | |
2769 | ||
2770 | /* Checks whether 's' is the string representation of an OpenFlow port number, | |
2771 | * either as an integer or a string name (e.g. "LOCAL"). If it is, stores the | |
2772 | * number in '*port' and returns true. Otherwise, returns false. */ | |
2773 | bool | |
2774 | ofputil_port_from_string(const char *name, uint16_t *port) | |
2775 | { | |
2776 | struct pair { | |
2777 | const char *name; | |
2778 | uint16_t value; | |
2779 | }; | |
2780 | static const struct pair pairs[] = { | |
2781 | #define OFPUTIL_NAMED_PORT(NAME) {#NAME, OFPP_##NAME}, | |
2782 | OFPUTIL_NAMED_PORTS | |
2783 | #undef OFPUTIL_NAMED_PORT | |
2784 | }; | |
2785 | static const int n_pairs = ARRAY_SIZE(pairs); | |
2786 | int i; | |
2787 | ||
2788 | if (str_to_int(name, 0, &i) && i >= 0 && i < UINT16_MAX) { | |
2789 | *port = i; | |
2790 | return true; | |
2791 | } | |
2792 | ||
2793 | for (i = 0; i < n_pairs; i++) { | |
2794 | if (!strcasecmp(name, pairs[i].name)) { | |
2795 | *port = pairs[i].value; | |
2796 | return true; | |
2797 | } | |
2798 | } | |
2799 | return false; | |
2800 | } | |
2801 | ||
2802 | /* Appends to 's' a string representation of the OpenFlow port number 'port'. | |
2803 | * Most ports' string representation is just the port number, but for special | |
2804 | * ports, e.g. OFPP_LOCAL, it is the name, e.g. "LOCAL". */ | |
2805 | void | |
2806 | ofputil_format_port(uint16_t port, struct ds *s) | |
2807 | { | |
2808 | const char *name; | |
2809 | ||
2810 | switch (port) { | |
2811 | #define OFPUTIL_NAMED_PORT(NAME) case OFPP_##NAME: name = #NAME; break; | |
2812 | OFPUTIL_NAMED_PORTS | |
2813 | #undef OFPUTIL_NAMED_PORT | |
2814 | ||
2815 | default: | |
2816 | ds_put_format(s, "%"PRIu16, port); | |
2817 | return; | |
2818 | } | |
2819 | ds_put_cstr(s, name); | |
2820 | } | |
2821 | ||
90bf1e07 | 2822 | static enum ofperr |
29901626 BP |
2823 | check_resubmit_table(const struct nx_action_resubmit *nar) |
2824 | { | |
2825 | if (nar->pad[0] || nar->pad[1] || nar->pad[2]) { | |
90bf1e07 | 2826 | return OFPERR_OFPBAC_BAD_ARGUMENT; |
29901626 BP |
2827 | } |
2828 | return 0; | |
2829 | } | |
2830 | ||
90bf1e07 | 2831 | static enum ofperr |
f694937d EJ |
2832 | check_output_reg(const struct nx_action_output_reg *naor, |
2833 | const struct flow *flow) | |
2834 | { | |
816fd533 | 2835 | struct mf_subfield src; |
f694937d EJ |
2836 | size_t i; |
2837 | ||
2838 | for (i = 0; i < sizeof naor->zero; i++) { | |
2839 | if (naor->zero[i]) { | |
90bf1e07 | 2840 | return OFPERR_OFPBAC_BAD_ARGUMENT; |
f694937d EJ |
2841 | } |
2842 | } | |
2843 | ||
816fd533 BP |
2844 | nxm_decode(&src, naor->src, naor->ofs_nbits); |
2845 | return mf_check_src(&src, flow); | |
f694937d EJ |
2846 | } |
2847 | ||
90bf1e07 | 2848 | enum ofperr |
38f2e360 BP |
2849 | validate_actions(const union ofp_action *actions, size_t n_actions, |
2850 | const struct flow *flow, int max_ports) | |
c1c9c9c4 | 2851 | { |
38f2e360 BP |
2852 | const union ofp_action *a; |
2853 | size_t left; | |
c1c9c9c4 | 2854 | |
38f2e360 | 2855 | OFPUTIL_ACTION_FOR_EACH (a, left, actions, n_actions) { |
90bf1e07 | 2856 | enum ofperr error; |
38f2e360 | 2857 | uint16_t port; |
38f2e360 | 2858 | int code; |
c1c9c9c4 | 2859 | |
38f2e360 BP |
2860 | code = ofputil_decode_action(a); |
2861 | if (code < 0) { | |
38f2e360 | 2862 | error = -code; |
38f2e360 BP |
2863 | VLOG_WARN_RL(&bad_ofmsg_rl, |
2864 | "action decoding error at offset %td (%s)", | |
90bf1e07 | 2865 | (a - actions) * sizeof *a, ofperr_get_name(error)); |
fa37b408 | 2866 | |
38f2e360 BP |
2867 | return error; |
2868 | } | |
fa37b408 | 2869 | |
38f2e360 BP |
2870 | error = 0; |
2871 | switch ((enum ofputil_action_code) code) { | |
2872 | case OFPUTIL_OFPAT_OUTPUT: | |
77410139 EJ |
2873 | error = ofputil_check_output_port(ntohs(a->output.port), |
2874 | max_ports); | |
38f2e360 | 2875 | break; |
e41a9130 | 2876 | |
38f2e360 BP |
2877 | case OFPUTIL_OFPAT_SET_VLAN_VID: |
2878 | if (a->vlan_vid.vlan_vid & ~htons(0xfff)) { | |
90bf1e07 | 2879 | error = OFPERR_OFPBAC_BAD_ARGUMENT; |
38f2e360 BP |
2880 | } |
2881 | break; | |
96fc46e8 | 2882 | |
38f2e360 BP |
2883 | case OFPUTIL_OFPAT_SET_VLAN_PCP: |
2884 | if (a->vlan_pcp.vlan_pcp & ~7) { | |
90bf1e07 | 2885 | error = OFPERR_OFPBAC_BAD_ARGUMENT; |
38f2e360 BP |
2886 | } |
2887 | break; | |
96fc46e8 | 2888 | |
38f2e360 BP |
2889 | case OFPUTIL_OFPAT_ENQUEUE: |
2890 | port = ntohs(((const struct ofp_action_enqueue *) a)->port); | |
82172632 EJ |
2891 | if (port >= max_ports && port != OFPP_IN_PORT |
2892 | && port != OFPP_LOCAL) { | |
90bf1e07 | 2893 | error = OFPERR_OFPBAC_BAD_OUT_PORT; |
38f2e360 BP |
2894 | } |
2895 | break; | |
96fc46e8 | 2896 | |
38f2e360 BP |
2897 | case OFPUTIL_NXAST_REG_MOVE: |
2898 | error = nxm_check_reg_move((const struct nx_action_reg_move *) a, | |
2899 | flow); | |
2900 | break; | |
96fc46e8 | 2901 | |
38f2e360 BP |
2902 | case OFPUTIL_NXAST_REG_LOAD: |
2903 | error = nxm_check_reg_load((const struct nx_action_reg_load *) a, | |
2904 | flow); | |
2905 | break; | |
b9298d3f | 2906 | |
38f2e360 | 2907 | case OFPUTIL_NXAST_MULTIPATH: |
43edca57 EJ |
2908 | error = multipath_check((const struct nx_action_multipath *) a, |
2909 | flow); | |
38f2e360 BP |
2910 | break; |
2911 | ||
2912 | case OFPUTIL_NXAST_AUTOPATH: | |
43edca57 EJ |
2913 | error = autopath_check((const struct nx_action_autopath *) a, |
2914 | flow); | |
38f2e360 BP |
2915 | break; |
2916 | ||
daff3353 | 2917 | case OFPUTIL_NXAST_BUNDLE: |
a368bb53 | 2918 | case OFPUTIL_NXAST_BUNDLE_LOAD: |
daff3353 | 2919 | error = bundle_check((const struct nx_action_bundle *) a, |
a368bb53 | 2920 | max_ports, flow); |
daff3353 EJ |
2921 | break; |
2922 | ||
f694937d EJ |
2923 | case OFPUTIL_NXAST_OUTPUT_REG: |
2924 | error = check_output_reg((const struct nx_action_output_reg *) a, | |
2925 | flow); | |
2926 | break; | |
2927 | ||
29901626 BP |
2928 | case OFPUTIL_NXAST_RESUBMIT_TABLE: |
2929 | error = check_resubmit_table( | |
2930 | (const struct nx_action_resubmit *) a); | |
2931 | break; | |
2932 | ||
75a75043 BP |
2933 | case OFPUTIL_NXAST_LEARN: |
2934 | error = learn_check((const struct nx_action_learn *) a, flow); | |
2935 | break; | |
2936 | ||
a7349929 BP |
2937 | case OFPUTIL_NXAST_CONTROLLER: |
2938 | if (((const struct nx_action_controller *) a)->zero) { | |
2939 | error = OFPERR_NXBAC_MUST_BE_ZERO; | |
2940 | } | |
2941 | break; | |
2942 | ||
38f2e360 BP |
2943 | case OFPUTIL_OFPAT_STRIP_VLAN: |
2944 | case OFPUTIL_OFPAT_SET_NW_SRC: | |
2945 | case OFPUTIL_OFPAT_SET_NW_DST: | |
2946 | case OFPUTIL_OFPAT_SET_NW_TOS: | |
2947 | case OFPUTIL_OFPAT_SET_TP_SRC: | |
2948 | case OFPUTIL_OFPAT_SET_TP_DST: | |
2949 | case OFPUTIL_OFPAT_SET_DL_SRC: | |
2950 | case OFPUTIL_OFPAT_SET_DL_DST: | |
2951 | case OFPUTIL_NXAST_RESUBMIT: | |
2952 | case OFPUTIL_NXAST_SET_TUNNEL: | |
2953 | case OFPUTIL_NXAST_SET_QUEUE: | |
2954 | case OFPUTIL_NXAST_POP_QUEUE: | |
2955 | case OFPUTIL_NXAST_NOTE: | |
2956 | case OFPUTIL_NXAST_SET_TUNNEL64: | |
848e8809 | 2957 | case OFPUTIL_NXAST_EXIT: |
f0fd1a17 | 2958 | case OFPUTIL_NXAST_DEC_TTL: |
0e553d9c | 2959 | case OFPUTIL_NXAST_FIN_TIMEOUT: |
38f2e360 | 2960 | break; |
53ddd40a | 2961 | } |
53ddd40a | 2962 | |
3b6a2571 | 2963 | if (error) { |
38f2e360 | 2964 | VLOG_WARN_RL(&bad_ofmsg_rl, "bad action at offset %td (%s)", |
90bf1e07 | 2965 | (a - actions) * sizeof *a, ofperr_get_name(error)); |
3b6a2571 EJ |
2966 | return error; |
2967 | } | |
fa37b408 | 2968 | } |
38f2e360 BP |
2969 | if (left) { |
2970 | VLOG_WARN_RL(&bad_ofmsg_rl, "bad action format at offset %zu", | |
2971 | (n_actions - left) * sizeof *a); | |
90bf1e07 | 2972 | return OFPERR_OFPBAC_BAD_LEN; |
38f2e360 BP |
2973 | } |
2974 | return 0; | |
fa37b408 BP |
2975 | } |
2976 | ||
51cb6e0c BP |
2977 | struct ofputil_action { |
2978 | int code; | |
38f2e360 BP |
2979 | unsigned int min_len; |
2980 | unsigned int max_len; | |
2981 | }; | |
27bcf966 | 2982 | |
51cb6e0c | 2983 | static const struct ofputil_action action_bad_type |
90bf1e07 | 2984 | = { -OFPERR_OFPBAC_BAD_TYPE, 0, UINT_MAX }; |
51cb6e0c | 2985 | static const struct ofputil_action action_bad_len |
90bf1e07 | 2986 | = { -OFPERR_OFPBAC_BAD_LEN, 0, UINT_MAX }; |
51cb6e0c | 2987 | static const struct ofputil_action action_bad_vendor |
90bf1e07 | 2988 | = { -OFPERR_OFPBAC_BAD_VENDOR, 0, UINT_MAX }; |
27bcf966 | 2989 | |
51cb6e0c | 2990 | static const struct ofputil_action * |
38f2e360 BP |
2991 | ofputil_decode_ofpat_action(const union ofp_action *a) |
2992 | { | |
51cb6e0c | 2993 | enum ofp_action_type type = ntohs(a->type); |
fa37b408 | 2994 | |
51cb6e0c | 2995 | switch (type) { |
e23ae585 | 2996 | #define OFPAT_ACTION(ENUM, STRUCT, NAME) \ |
51cb6e0c BP |
2997 | case ENUM: { \ |
2998 | static const struct ofputil_action action = { \ | |
e23ae585 BP |
2999 | OFPUTIL_##ENUM, \ |
3000 | sizeof(struct STRUCT), \ | |
3001 | sizeof(struct STRUCT) \ | |
51cb6e0c BP |
3002 | }; \ |
3003 | return &action; \ | |
3004 | } | |
e23ae585 | 3005 | #include "ofp-util.def" |
51cb6e0c BP |
3006 | |
3007 | case OFPAT_VENDOR: | |
3008 | default: | |
3009 | return &action_bad_type; | |
38f2e360 BP |
3010 | } |
3011 | } | |
fa37b408 | 3012 | |
51cb6e0c | 3013 | static const struct ofputil_action * |
38f2e360 BP |
3014 | ofputil_decode_nxast_action(const union ofp_action *a) |
3015 | { | |
51cb6e0c BP |
3016 | const struct nx_action_header *nah = (const struct nx_action_header *) a; |
3017 | enum nx_action_subtype subtype = ntohs(nah->subtype); | |
3018 | ||
3019 | switch (subtype) { | |
e23ae585 BP |
3020 | #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \ |
3021 | case ENUM: { \ | |
3022 | static const struct ofputil_action action = { \ | |
3023 | OFPUTIL_##ENUM, \ | |
3024 | sizeof(struct STRUCT), \ | |
3025 | EXTENSIBLE ? UINT_MAX : sizeof(struct STRUCT) \ | |
3026 | }; \ | |
3027 | return &action; \ | |
38f2e360 | 3028 | } |
e23ae585 | 3029 | #include "ofp-util.def" |
51cb6e0c BP |
3030 | |
3031 | case NXAST_SNAT__OBSOLETE: | |
3032 | case NXAST_DROP_SPOOFED_ARP__OBSOLETE: | |
3033 | default: | |
3034 | return &action_bad_type; | |
fa37b408 BP |
3035 | } |
3036 | } | |
3037 | ||
38f2e360 | 3038 | /* Parses 'a' to determine its type. Returns a nonnegative OFPUTIL_OFPAT_* or |
90bf1e07 BP |
3039 | * OFPUTIL_NXAST_* constant if successful, otherwise a negative OFPERR_* error |
3040 | * code. | |
38f2e360 BP |
3041 | * |
3042 | * The caller must have already verified that 'a''s length is correct (that is, | |
3043 | * a->header.len is nonzero and a multiple of sizeof(union ofp_action) and no | |
3044 | * longer than the amount of space allocated to 'a'). | |
3045 | * | |
3046 | * This function verifies that 'a''s length is correct for the type of action | |
3047 | * that it represents. */ | |
fa37b408 | 3048 | int |
38f2e360 | 3049 | ofputil_decode_action(const union ofp_action *a) |
fa37b408 | 3050 | { |
51cb6e0c BP |
3051 | const struct ofputil_action *action; |
3052 | uint16_t len = ntohs(a->header.len); | |
3053 | ||
38f2e360 | 3054 | if (a->type != htons(OFPAT_VENDOR)) { |
51cb6e0c | 3055 | action = ofputil_decode_ofpat_action(a); |
38f2e360 | 3056 | } else { |
51cb6e0c BP |
3057 | switch (ntohl(a->vendor.vendor)) { |
3058 | case NX_VENDOR_ID: | |
3059 | if (len < sizeof(struct nx_action_header)) { | |
90bf1e07 | 3060 | return -OFPERR_OFPBAC_BAD_LEN; |
51cb6e0c BP |
3061 | } |
3062 | action = ofputil_decode_nxast_action(a); | |
3063 | break; | |
3064 | default: | |
3065 | action = &action_bad_vendor; | |
3066 | break; | |
3067 | } | |
38f2e360 | 3068 | } |
51cb6e0c BP |
3069 | |
3070 | return (len >= action->min_len && len <= action->max_len | |
3071 | ? action->code | |
90bf1e07 | 3072 | : -OFPERR_OFPBAC_BAD_LEN); |
38f2e360 | 3073 | } |
fa37b408 | 3074 | |
38f2e360 BP |
3075 | /* Parses 'a' and returns its type as an OFPUTIL_OFPAT_* or OFPUTIL_NXAST_* |
3076 | * constant. The caller must have already validated that 'a' is a valid action | |
3077 | * understood by Open vSwitch (e.g. by a previous successful call to | |
3078 | * ofputil_decode_action()). */ | |
3079 | enum ofputil_action_code | |
3080 | ofputil_decode_action_unsafe(const union ofp_action *a) | |
3081 | { | |
51cb6e0c BP |
3082 | const struct ofputil_action *action; |
3083 | ||
38f2e360 | 3084 | if (a->type != htons(OFPAT_VENDOR)) { |
51cb6e0c | 3085 | action = ofputil_decode_ofpat_action(a); |
38f2e360 | 3086 | } else { |
51cb6e0c | 3087 | action = ofputil_decode_nxast_action(a); |
fa37b408 | 3088 | } |
51cb6e0c BP |
3089 | |
3090 | return action->code; | |
fa37b408 BP |
3091 | } |
3092 | ||
e23ae585 BP |
3093 | /* Returns the 'enum ofputil_action_code' corresponding to 'name' (e.g. if |
3094 | * 'name' is "output" then the return value is OFPUTIL_OFPAT_OUTPUT), or -1 if | |
3095 | * 'name' is not the name of any action. | |
3096 | * | |
3097 | * ofp-util.def lists the mapping from names to action. */ | |
3098 | int | |
3099 | ofputil_action_code_from_name(const char *name) | |
3100 | { | |
3101 | static const char *names[OFPUTIL_N_ACTIONS] = { | |
3102 | #define OFPAT_ACTION(ENUM, STRUCT, NAME) NAME, | |
3103 | #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) NAME, | |
3104 | #include "ofp-util.def" | |
3105 | }; | |
3106 | ||
3107 | const char **p; | |
3108 | ||
3109 | for (p = names; p < &names[ARRAY_SIZE(names)]; p++) { | |
3110 | if (*p && !strcasecmp(name, *p)) { | |
3111 | return p - names; | |
3112 | } | |
3113 | } | |
3114 | return -1; | |
3115 | } | |
3116 | ||
93996add BP |
3117 | /* Appends an action of the type specified by 'code' to 'buf' and returns the |
3118 | * action. Initializes the parts of 'action' that identify it as having type | |
3119 | * <ENUM> and length 'sizeof *action' and zeros the rest. For actions that | |
3120 | * have variable length, the length used and cleared is that of struct | |
3121 | * <STRUCT>. */ | |
3122 | void * | |
3123 | ofputil_put_action(enum ofputil_action_code code, struct ofpbuf *buf) | |
3124 | { | |
3125 | switch (code) { | |
3126 | #define OFPAT_ACTION(ENUM, STRUCT, NAME) \ | |
3127 | case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf); | |
3128 | #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \ | |
3129 | case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf); | |
3130 | #include "ofp-util.def" | |
3131 | } | |
3132 | NOT_REACHED(); | |
3133 | } | |
3134 | ||
3135 | #define OFPAT_ACTION(ENUM, STRUCT, NAME) \ | |
3136 | void \ | |
3137 | ofputil_init_##ENUM(struct STRUCT *s) \ | |
3138 | { \ | |
3139 | memset(s, 0, sizeof *s); \ | |
3140 | s->type = htons(ENUM); \ | |
3141 | s->len = htons(sizeof *s); \ | |
3142 | } \ | |
3143 | \ | |
3144 | struct STRUCT * \ | |
3145 | ofputil_put_##ENUM(struct ofpbuf *buf) \ | |
3146 | { \ | |
3147 | struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \ | |
3148 | ofputil_init_##ENUM(s); \ | |
3149 | return s; \ | |
3150 | } | |
3151 | #define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \ | |
3152 | void \ | |
3153 | ofputil_init_##ENUM(struct STRUCT *s) \ | |
3154 | { \ | |
3155 | memset(s, 0, sizeof *s); \ | |
3156 | s->type = htons(OFPAT_VENDOR); \ | |
3157 | s->len = htons(sizeof *s); \ | |
3158 | s->vendor = htonl(NX_VENDOR_ID); \ | |
3159 | s->subtype = htons(ENUM); \ | |
3160 | } \ | |
3161 | \ | |
3162 | struct STRUCT * \ | |
3163 | ofputil_put_##ENUM(struct ofpbuf *buf) \ | |
3164 | { \ | |
3165 | struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \ | |
3166 | ofputil_init_##ENUM(s); \ | |
3167 | return s; \ | |
3168 | } | |
3169 | #include "ofp-util.def" | |
3170 | ||
dbba996b | 3171 | /* Returns true if 'action' outputs to 'port', false otherwise. */ |
c1c9c9c4 | 3172 | bool |
dbba996b | 3173 | action_outputs_to_port(const union ofp_action *action, ovs_be16 port) |
c1c9c9c4 BP |
3174 | { |
3175 | switch (ntohs(action->type)) { | |
3176 | case OFPAT_OUTPUT: | |
3177 | return action->output.port == port; | |
3178 | case OFPAT_ENQUEUE: | |
3179 | return ((const struct ofp_action_enqueue *) action)->port == port; | |
3180 | default: | |
3181 | return false; | |
3182 | } | |
3183 | } | |
3184 | ||
b459a924 BP |
3185 | /* "Normalizes" the wildcards in 'rule'. That means: |
3186 | * | |
3187 | * 1. If the type of level N is known, then only the valid fields for that | |
3188 | * level may be specified. For example, ARP does not have a TOS field, | |
3189 | * so nw_tos must be wildcarded if 'rule' specifies an ARP flow. | |
3190 | * Similarly, IPv4 does not have any IPv6 addresses, so ipv6_src and | |
3191 | * ipv6_dst (and other fields) must be wildcarded if 'rule' specifies an | |
3192 | * IPv4 flow. | |
3193 | * | |
3194 | * 2. If the type of level N is not known (or not understood by Open | |
3195 | * vSwitch), then no fields at all for that level may be specified. For | |
3196 | * example, Open vSwitch does not understand SCTP, an L4 protocol, so the | |
3197 | * L4 fields tp_src and tp_dst must be wildcarded if 'rule' specifies an | |
3198 | * SCTP flow. | |
27527aa0 | 3199 | */ |
b459a924 | 3200 | void |
27527aa0 | 3201 | ofputil_normalize_rule(struct cls_rule *rule) |
b459a924 BP |
3202 | { |
3203 | enum { | |
3204 | MAY_NW_ADDR = 1 << 0, /* nw_src, nw_dst */ | |
3205 | MAY_TP_ADDR = 1 << 1, /* tp_src, tp_dst */ | |
3206 | MAY_NW_PROTO = 1 << 2, /* nw_proto */ | |
a61680c6 | 3207 | MAY_IPVx = 1 << 3, /* tos, frag, ttl */ |
b459a924 BP |
3208 | MAY_ARP_SHA = 1 << 4, /* arp_sha */ |
3209 | MAY_ARP_THA = 1 << 5, /* arp_tha */ | |
d78477ec | 3210 | MAY_IPV6 = 1 << 6, /* ipv6_src, ipv6_dst, ipv6_label */ |
b459a924 BP |
3211 | MAY_ND_TARGET = 1 << 7 /* nd_target */ |
3212 | } may_match; | |
3213 | ||
3214 | struct flow_wildcards wc; | |
3215 | ||
3216 | /* Figure out what fields may be matched. */ | |
3217 | if (rule->flow.dl_type == htons(ETH_TYPE_IP)) { | |
9e44d715 | 3218 | may_match = MAY_NW_PROTO | MAY_IPVx | MAY_NW_ADDR; |
b459a924 BP |
3219 | if (rule->flow.nw_proto == IPPROTO_TCP || |
3220 | rule->flow.nw_proto == IPPROTO_UDP || | |
3221 | rule->flow.nw_proto == IPPROTO_ICMP) { | |
3222 | may_match |= MAY_TP_ADDR; | |
3223 | } | |
27527aa0 | 3224 | } else if (rule->flow.dl_type == htons(ETH_TYPE_IPV6)) { |
d78477ec | 3225 | may_match = MAY_NW_PROTO | MAY_IPVx | MAY_IPV6; |
b459a924 BP |
3226 | if (rule->flow.nw_proto == IPPROTO_TCP || |
3227 | rule->flow.nw_proto == IPPROTO_UDP) { | |
3228 | may_match |= MAY_TP_ADDR; | |
3229 | } else if (rule->flow.nw_proto == IPPROTO_ICMPV6) { | |
3230 | may_match |= MAY_TP_ADDR; | |
3231 | if (rule->flow.tp_src == htons(ND_NEIGHBOR_SOLICIT)) { | |
3232 | may_match |= MAY_ND_TARGET | MAY_ARP_SHA; | |
3233 | } else if (rule->flow.tp_src == htons(ND_NEIGHBOR_ADVERT)) { | |
3234 | may_match |= MAY_ND_TARGET | MAY_ARP_THA; | |
3235 | } | |
3236 | } | |
3237 | } else if (rule->flow.dl_type == htons(ETH_TYPE_ARP)) { | |
27527aa0 | 3238 | may_match = MAY_NW_PROTO | MAY_NW_ADDR | MAY_ARP_SHA | MAY_ARP_THA; |
1c0b7503 | 3239 | } else { |
b459a924 BP |
3240 | may_match = 0; |
3241 | } | |
3242 | ||
3243 | /* Clear the fields that may not be matched. */ | |
3244 | wc = rule->wc; | |
3245 | if (!(may_match & MAY_NW_ADDR)) { | |
3246 | wc.nw_src_mask = wc.nw_dst_mask = htonl(0); | |
3247 | } | |
3248 | if (!(may_match & MAY_TP_ADDR)) { | |
73f33563 | 3249 | wc.tp_src_mask = wc.tp_dst_mask = htons(0); |
b459a924 BP |
3250 | } |
3251 | if (!(may_match & MAY_NW_PROTO)) { | |
3252 | wc.wildcards |= FWW_NW_PROTO; | |
3253 | } | |
9e44d715 | 3254 | if (!(may_match & MAY_IPVx)) { |
2486e66a JP |
3255 | wc.wildcards |= FWW_NW_DSCP; |
3256 | wc.wildcards |= FWW_NW_ECN; | |
a61680c6 | 3257 | wc.wildcards |= FWW_NW_TTL; |
b459a924 BP |
3258 | } |
3259 | if (!(may_match & MAY_ARP_SHA)) { | |
3260 | wc.wildcards |= FWW_ARP_SHA; | |
3261 | } | |
3262 | if (!(may_match & MAY_ARP_THA)) { | |
3263 | wc.wildcards |= FWW_ARP_THA; | |
3264 | } | |
d78477ec | 3265 | if (!(may_match & MAY_IPV6)) { |
b459a924 | 3266 | wc.ipv6_src_mask = wc.ipv6_dst_mask = in6addr_any; |
fa8223b7 | 3267 | wc.wildcards |= FWW_IPV6_LABEL; |
b459a924 BP |
3268 | } |
3269 | if (!(may_match & MAY_ND_TARGET)) { | |
3270 | wc.wildcards |= FWW_ND_TARGET; | |
3271 | } | |
3272 | ||
3273 | /* Log any changes. */ | |
3274 | if (!flow_wildcards_equal(&wc, &rule->wc)) { | |
3275 | bool log = !VLOG_DROP_INFO(&bad_ofmsg_rl); | |
3276 | char *pre = log ? cls_rule_to_string(rule) : NULL; | |
3277 | ||
3278 | rule->wc = wc; | |
3279 | cls_rule_zero_wildcarded_fields(rule); | |
3280 | ||
3281 | if (log) { | |
3282 | char *post = cls_rule_to_string(rule); | |
3283 | VLOG_INFO("normalization changed ofp_match, details:"); | |
3284 | VLOG_INFO(" pre: %s", pre); | |
3285 | VLOG_INFO("post: %s", post); | |
3286 | free(pre); | |
3287 | free(post); | |
3288 | } | |
fa37b408 | 3289 | } |
3f09c339 | 3290 | } |
26c112c2 | 3291 | |
3052b0c5 BP |
3292 | /* Attempts to pull 'actions_len' bytes from the front of 'b'. Returns 0 if |
3293 | * successful, otherwise an OpenFlow error. | |
3294 | * | |
3295 | * If successful, the first action is stored in '*actionsp' and the number of | |
3296 | * "union ofp_action" size elements into '*n_actionsp'. Otherwise NULL and 0 | |
3297 | * are stored, respectively. | |
3298 | * | |
3299 | * This function does not check that the actions are valid (the caller should | |
3300 | * do so, with validate_actions()). The caller is also responsible for making | |
3301 | * sure that 'b->data' is initially aligned appropriately for "union | |
3302 | * ofp_action". */ | |
90bf1e07 | 3303 | enum ofperr |
3052b0c5 BP |
3304 | ofputil_pull_actions(struct ofpbuf *b, unsigned int actions_len, |
3305 | union ofp_action **actionsp, size_t *n_actionsp) | |
3306 | { | |
69b6be19 | 3307 | if (actions_len % OFP_ACTION_ALIGN != 0) { |
f4350529 BP |
3308 | VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u " |
3309 | "is not a multiple of %d", actions_len, OFP_ACTION_ALIGN); | |
3052b0c5 BP |
3310 | goto error; |
3311 | } | |
3312 | ||
3313 | *actionsp = ofpbuf_try_pull(b, actions_len); | |
3314 | if (*actionsp == NULL) { | |
f4350529 BP |
3315 | VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u " |
3316 | "exceeds remaining message length (%zu)", | |
3317 | actions_len, b->size); | |
3052b0c5 BP |
3318 | goto error; |
3319 | } | |
3320 | ||
69b6be19 | 3321 | *n_actionsp = actions_len / OFP_ACTION_ALIGN; |
3052b0c5 BP |
3322 | return 0; |
3323 | ||
3324 | error: | |
3325 | *actionsp = NULL; | |
3326 | *n_actionsp = 0; | |
90bf1e07 | 3327 | return OFPERR_OFPBRC_BAD_LEN; |
3052b0c5 | 3328 | } |
18ddadc2 BP |
3329 | |
3330 | bool | |
3331 | ofputil_actions_equal(const union ofp_action *a, size_t n_a, | |
3332 | const union ofp_action *b, size_t n_b) | |
3333 | { | |
3334 | return n_a == n_b && (!n_a || !memcmp(a, b, n_a * sizeof *a)); | |
3335 | } | |
3336 | ||
3337 | union ofp_action * | |
3338 | ofputil_actions_clone(const union ofp_action *actions, size_t n) | |
3339 | { | |
3340 | return n ? xmemdup(actions, n * sizeof *actions) : NULL; | |
3341 | } | |
0ff22822 BP |
3342 | |
3343 | /* Parses a key or a key-value pair from '*stringp'. | |
3344 | * | |
3345 | * On success: Stores the key into '*keyp'. Stores the value, if present, into | |
3346 | * '*valuep', otherwise an empty string. Advances '*stringp' past the end of | |
3347 | * the key-value pair, preparing it for another call. '*keyp' and '*valuep' | |
3348 | * are substrings of '*stringp' created by replacing some of its bytes by null | |
3349 | * terminators. Returns true. | |
3350 | * | |
3351 | * If '*stringp' is just white space or commas, sets '*keyp' and '*valuep' to | |
3352 | * NULL and returns false. */ | |
3353 | bool | |
3354 | ofputil_parse_key_value(char **stringp, char **keyp, char **valuep) | |
3355 | { | |
3356 | char *pos, *key, *value; | |
3357 | size_t key_len; | |
3358 | ||
3359 | pos = *stringp; | |
3360 | pos += strspn(pos, ", \t\r\n"); | |
3361 | if (*pos == '\0') { | |
3362 | *keyp = *valuep = NULL; | |
3363 | return false; | |
3364 | } | |
3365 | ||
3366 | key = pos; | |
3367 | key_len = strcspn(pos, ":=(, \t\r\n"); | |
3368 | if (key[key_len] == ':' || key[key_len] == '=') { | |
3369 | /* The value can be separated by a colon. */ | |
3370 | size_t value_len; | |
3371 | ||
3372 | value = key + key_len + 1; | |
3373 | value_len = strcspn(value, ", \t\r\n"); | |
3374 | pos = value + value_len + (value[value_len] != '\0'); | |
3375 | value[value_len] = '\0'; | |
3376 | } else if (key[key_len] == '(') { | |
3377 | /* The value can be surrounded by balanced parentheses. The outermost | |
3378 | * set of parentheses is removed. */ | |
3379 | int level = 1; | |
3380 | size_t value_len; | |
3381 | ||
3382 | value = key + key_len + 1; | |
3383 | for (value_len = 0; level > 0; value_len++) { | |
3384 | switch (value[value_len]) { | |
3385 | case '\0': | |
3386 | ovs_fatal(0, "unbalanced parentheses in argument to %s", key); | |
3387 | ||
3388 | case '(': | |
3389 | level++; | |
3390 | break; | |
3391 | ||
3392 | case ')': | |
3393 | level--; | |
3394 | break; | |
3395 | } | |
3396 | } | |
3397 | value[value_len - 1] = '\0'; | |
3398 | pos = value + value_len; | |
3399 | } else { | |
3400 | /* There might be no value at all. */ | |
3401 | value = key + key_len; /* Will become the empty string below. */ | |
3402 | pos = key + key_len + (key[key_len] != '\0'); | |
3403 | } | |
3404 | key[key_len] = '\0'; | |
3405 | ||
3406 | *stringp = pos; | |
3407 | *keyp = key; | |
3408 | *valuep = value; | |
3409 | return true; | |
3410 | } |