]>
Commit | Line | Data |
---|---|---|
3b6a2571 | 1 | /* |
e0edde6f | 2 | * Copyright (c) 2011 Nicira, Inc. |
3b6a2571 EJ |
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 | ||
19 | #include "autopath.h" | |
20 | ||
21 | #include <inttypes.h> | |
22 | #include <stdlib.h> | |
23 | ||
24 | #include "flow.h" | |
816fd533 | 25 | #include "meta-flow.h" |
3b6a2571 | 26 | #include "nx-match.h" |
90bf1e07 | 27 | #include "ofp-errors.h" |
3b6a2571 EJ |
28 | #include "ofp-util.h" |
29 | #include "openflow/nicira-ext.h" | |
30 | #include "vlog.h" | |
31 | ||
32 | VLOG_DEFINE_THIS_MODULE(autopath); | |
33 | ||
3b6a2571 EJ |
34 | /* Loads 'ofp_port' into the appropriate register in accordance with the |
35 | * autopath action. */ | |
36 | void | |
37 | autopath_execute(const struct nx_action_autopath *ap, struct flow *flow, | |
38 | uint16_t ofp_port) | |
39 | { | |
816fd533 BP |
40 | struct mf_subfield dst; |
41 | ||
42 | nxm_decode(&dst, ap->dst, ap->ofs_nbits); | |
43 | mf_set_subfield_value(&dst, ofp_port, flow); | |
3b6a2571 EJ |
44 | } |
45 | ||
46 | void | |
47 | autopath_parse(struct nx_action_autopath *ap, const char *s_) | |
48 | { | |
49 | char *s; | |
816fd533 BP |
50 | char *id_str, *dst_s, *save_ptr; |
51 | struct mf_subfield dst; | |
52 | int id_int; | |
3b6a2571 EJ |
53 | |
54 | s = xstrdup(s_); | |
55 | save_ptr = NULL; | |
56 | id_str = strtok_r(s, ", ", &save_ptr); | |
816fd533 | 57 | dst_s = strtok_r(NULL, ", ", &save_ptr); |
3b6a2571 | 58 | |
816fd533 | 59 | if (!dst_s) { |
3b6a2571 EJ |
60 | ovs_fatal(0, "%s: not enough arguments to autopath action", s_); |
61 | } | |
62 | ||
63 | id_int = atoi(id_str); | |
64 | if (id_int < 1 || id_int > UINT32_MAX) { | |
65 | ovs_fatal(0, "%s: autopath id %d is not in valid range " | |
66 | "1 to %"PRIu32, s_, id_int, UINT32_MAX); | |
67 | } | |
68 | ||
816fd533 BP |
69 | mf_parse_subfield(&dst, dst_s); |
70 | if (dst.n_bits < 16) { | |
3b6a2571 | 71 | ovs_fatal(0, "%s: %d-bit destination field has %u possible values, " |
816fd533 BP |
72 | "less than required 65536", |
73 | s_, dst.n_bits, 1u << dst.n_bits); | |
3b6a2571 EJ |
74 | } |
75 | ||
93996add | 76 | ofputil_init_NXAST_AUTOPATH(ap); |
3b6a2571 | 77 | ap->id = htonl(id_int); |
816fd533 BP |
78 | ap->ofs_nbits = nxm_encode_ofs_nbits(dst.ofs, dst.n_bits); |
79 | ap->dst = htonl(dst.field->nxm_header); | |
3b6a2571 EJ |
80 | |
81 | free(s); | |
82 | } | |
83 | ||
90bf1e07 | 84 | enum ofperr |
43edca57 | 85 | autopath_check(const struct nx_action_autopath *ap, const struct flow *flow) |
3b6a2571 | 86 | { |
816fd533 | 87 | struct mf_subfield dst; |
ce523f65 | 88 | |
816fd533 BP |
89 | nxm_decode(&dst, ap->dst, ap->ofs_nbits); |
90 | if (dst.n_bits < 16) { | |
ce523f65 EJ |
91 | VLOG_WARN("at least 16 bit destination is required for autopath " |
92 | "action."); | |
90bf1e07 | 93 | return OFPERR_OFPBAC_BAD_ARGUMENT; |
ce523f65 EJ |
94 | } |
95 | ||
816fd533 | 96 | return mf_check_dst(&dst, flow); |
3b6a2571 | 97 | } |