Line data Source code
1 : /*
2 : * Copyright (c) 2015 Cisco and/or its affiliates.
3 : * Licensed under the Apache License, Version 2.0 (the "License");
4 : * you may not use this file except in compliance with the License.
5 : * You may obtain a copy of the License at:
6 : *
7 : * http://www.apache.org/licenses/LICENSE-2.0
8 : *
9 : * Unless required by applicable law or agreed to in writing, software
10 : * distributed under the License is distributed on an "AS IS" BASIS,
11 : * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 : * See the License for the specific language governing permissions and
13 : * limitations under the License.
14 : */
15 : /*
16 : * rewrite.c: packet rewrite
17 : *
18 : * Copyright (c) 2008 Eliot Dresselhaus
19 : *
20 : * Permission is hereby granted, free of charge, to any person obtaining
21 : * a copy of this software and associated documentation files (the
22 : * "Software"), to deal in the Software without restriction, including
23 : * without limitation the rights to use, copy, modify, merge, publish,
24 : * distribute, sublicense, and/or sell copies of the Software, and to
25 : * permit persons to whom the Software is furnished to do so, subject to
26 : * the following conditions:
27 : *
28 : * The above copyright notice and this permission notice shall be
29 : * included in all copies or substantial portions of the Software.
30 : *
31 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 : * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 : * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 : * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 : * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 : * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 : * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 : */
39 :
40 : #include <vnet/vnet.h>
41 : #include <vnet/ip/lookup.h>
42 :
43 : u8 *
44 391242 : format_vnet_rewrite_flags (u8 *s, va_list *ap)
45 : {
46 391242 : vnet_rewrite_flags_t f = va_arg (*ap, int);
47 :
48 391242 : if (f & VNET_REWRITE_HAS_FEATURES)
49 198846 : s = format (s, "features ");
50 391242 : if (f & VNET_REWRITE_FIXUP_IP4_O_4)
51 7609 : s = format (s, "fixup-ip4o4 ");
52 391242 : if (f & VNET_REWRITE_FIXUP_FLOW_HASH)
53 0 : s = format (s, "fixup-flow-hash ");
54 :
55 391242 : return (s);
56 : }
57 :
58 : u8 *
59 391242 : format_vnet_rewrite (u8 * s, va_list * args)
60 : {
61 391242 : vnet_rewrite_header_t *rw = va_arg (*args, vnet_rewrite_header_t *);
62 391242 : u32 max_data_bytes = va_arg (*args, u32);
63 391242 : CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
64 391242 : vnet_main_t *vnm = vnet_get_main ();
65 :
66 391242 : ASSERT (rw->data_bytes <= max_data_bytes);
67 :
68 391242 : if (rw->sw_if_index != ~0)
69 : {
70 : vnet_sw_interface_t *si;
71 391242 : si = vnet_get_sw_interface_or_null (vnm, rw->sw_if_index);
72 391242 : if (NULL != si)
73 391232 : s = format (s, "%U:", format_vnet_sw_interface_name, vnm, si);
74 : else
75 10 : s = format (s, "DELETED:%d", rw->sw_if_index);
76 : }
77 :
78 391242 : s = format (s, " mtu:%d next:%d", rw->max_l3_packet_bytes, rw->next_index);
79 391242 : s = format (s, " flags:[%U]", format_vnet_rewrite_flags, rw->flags);
80 :
81 : /* Format rewrite string. */
82 391242 : if (rw->data_bytes > 0)
83 376798 : s = format (s, " %U", format_hex_bytes, rw->data, rw->data_bytes);
84 :
85 391242 : return s;
86 : }
87 :
88 : u32
89 48081 : vnet_tx_node_index_for_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
90 : {
91 48081 : vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
92 48081 : return (hw->output_node_index);
93 : }
94 :
95 : void
96 20754 : vnet_rewrite_init (vnet_main_t * vnm,
97 : u32 sw_if_index,
98 : vnet_link_t linkt,
99 : u32 this_node, u32 next_node, vnet_rewrite_header_t * rw)
100 : {
101 20754 : rw->sw_if_index = sw_if_index;
102 20754 : rw->next_index = vlib_node_add_next (vnm->vlib_main, this_node, next_node);
103 20754 : rw->max_l3_packet_bytes =
104 20754 : vnet_sw_interface_get_mtu (vnm, sw_if_index, vnet_link_to_mtu (linkt));
105 20754 : }
106 :
107 : void
108 10462 : vnet_rewrite_update_mtu (vnet_main_t * vnm, vnet_link_t linkt,
109 : vnet_rewrite_header_t * rw)
110 : {
111 10462 : rw->max_l3_packet_bytes =
112 10462 : vnet_sw_interface_get_mtu (vnm, rw->sw_if_index,
113 : vnet_link_to_mtu (linkt));
114 10462 : }
115 :
116 : void
117 8543 : vnet_rewrite_for_sw_interface (vnet_main_t * vnm,
118 : vnet_link_t link_type,
119 : u32 sw_if_index,
120 : u32 node_index,
121 : void *dst_address,
122 : vnet_rewrite_header_t * rw,
123 : u32 max_rewrite_bytes)
124 : {
125 :
126 8543 : vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
127 : vnet_hw_interface_class_t *hc =
128 8543 : vnet_get_hw_interface_class (vnm, hw->hw_class_index);
129 8543 : u8 *rewrite = NULL;
130 :
131 8543 : vnet_rewrite_init (vnm, sw_if_index, link_type, node_index,
132 : vnet_tx_node_index_for_sw_interface (vnm, sw_if_index),
133 : rw);
134 :
135 8543 : ASSERT (hc->build_rewrite);
136 8543 : rewrite = hc->build_rewrite (vnm, sw_if_index, link_type, dst_address);
137 :
138 8543 : ASSERT (vec_len (rewrite) < max_rewrite_bytes);
139 8543 : vnet_rewrite_set_data_internal (rw, max_rewrite_bytes, rewrite,
140 8543 : vec_len (rewrite));
141 8543 : vec_free (rewrite);
142 8543 : }
143 :
144 : void
145 0 : serialize_vnet_rewrite (serialize_main_t * m, va_list * va)
146 : {
147 0 : vnet_rewrite_header_t *rw = va_arg (*va, vnet_rewrite_header_t *);
148 0 : u32 max_data_bytes = va_arg (*va, u32);
149 : u8 *p;
150 :
151 0 : serialize_integer (m, rw->sw_if_index, sizeof (rw->sw_if_index));
152 0 : serialize_integer (m, rw->data_bytes, sizeof (rw->data_bytes));
153 0 : serialize_integer (m, rw->max_l3_packet_bytes,
154 : sizeof (rw->max_l3_packet_bytes));
155 0 : p = serialize_get (m, rw->data_bytes);
156 0 : clib_memcpy (p, vnet_rewrite_get_data_internal (rw, max_data_bytes),
157 : rw->data_bytes);
158 0 : }
159 :
160 : void
161 0 : unserialize_vnet_rewrite (serialize_main_t * m, va_list * va)
162 : {
163 0 : vnet_rewrite_header_t *rw = va_arg (*va, vnet_rewrite_header_t *);
164 0 : u32 max_data_bytes = va_arg (*va, u32);
165 : u8 *p;
166 :
167 : /* It is up to user to fill these in. */
168 0 : rw->next_index = ~0;
169 :
170 0 : unserialize_integer (m, &rw->sw_if_index, sizeof (rw->sw_if_index));
171 0 : unserialize_integer (m, &rw->data_bytes, sizeof (rw->data_bytes));
172 0 : unserialize_integer (m, &rw->max_l3_packet_bytes,
173 : sizeof (rw->max_l3_packet_bytes));
174 0 : p = unserialize_get (m, rw->data_bytes);
175 0 : clib_memcpy (vnet_rewrite_get_data_internal (rw, max_data_bytes), p,
176 : rw->data_bytes);
177 0 : }
178 :
179 : u8 *
180 90 : vnet_build_rewrite_for_sw_interface (vnet_main_t * vnm,
181 : u32 sw_if_index,
182 : vnet_link_t link_type,
183 : const void *dst_address)
184 : {
185 90 : vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
186 : vnet_hw_interface_class_t *hc =
187 90 : vnet_get_hw_interface_class (vnm, hw->hw_class_index);
188 :
189 90 : ASSERT (hc->build_rewrite);
190 90 : return (hc->build_rewrite (vnm, sw_if_index, link_type, dst_address));
191 : }
192 :
193 :
194 : void
195 20990 : vnet_update_adjacency_for_sw_interface (vnet_main_t * vnm,
196 : u32 sw_if_index, u32 ai)
197 : {
198 20990 : vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
199 : vnet_hw_interface_class_t *hc =
200 20990 : vnet_get_hw_interface_class (vnm, hw->hw_class_index);
201 :
202 20990 : ASSERT (hc->update_adjacency);
203 20990 : hc->update_adjacency (vnm, sw_if_index, ai);
204 20990 : }
205 :
206 : /*
207 : * fd.io coding-style-patch-verification: ON
208 : *
209 : * Local Variables:
210 : * eval: (c-set-style "gnu")
211 : * End:
212 : */
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