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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 * rewrite.c: packet rewrite
18 * Copyright (c) 2008 Eliot Dresselhaus
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:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
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.
40 #include <vnet/vnet.h>
41 #include <vnet/ip/lookup.h>
44 format_vnet_rewrite (u8 * s, va_list * args)
46 vnet_rewrite_header_t *rw = va_arg (*args, vnet_rewrite_header_t *);
47 u32 max_data_bytes = va_arg (*args, u32);
48 CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
49 vnet_main_t *vnm = vnet_get_main ();
51 ASSERT (rw->data_bytes <= max_data_bytes);
53 if (rw->sw_if_index != ~0)
55 vnet_sw_interface_t *si;
56 si = vnet_get_sw_interface_or_null (vnm, rw->sw_if_index);
58 s = format (s, "%U:", format_vnet_sw_interface_name, vnm, si);
60 s = format (s, "DELETED:%d", rw->sw_if_index);
63 s = format (s, " mtu:%d", rw->max_l3_packet_bytes);
65 /* Format rewrite string. */
66 if (rw->data_bytes > 0)
67 s = format (s, " %U", format_hex_bytes, rw->data, rw->data_bytes);
73 vnet_tx_node_index_for_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
75 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
76 return (hw->output_node_index);
80 vnet_rewrite_init (vnet_main_t * vnm,
83 u32 this_node, u32 next_node, vnet_rewrite_header_t * rw)
85 rw->sw_if_index = sw_if_index;
86 rw->next_index = vlib_node_add_next (vnm->vlib_main, this_node, next_node);
87 rw->max_l3_packet_bytes =
88 vnet_sw_interface_get_mtu (vnm, sw_if_index, vnet_link_to_mtu (linkt));
92 vnet_rewrite_update_mtu (vnet_main_t * vnm, vnet_link_t linkt,
93 vnet_rewrite_header_t * rw)
95 rw->max_l3_packet_bytes =
96 vnet_sw_interface_get_mtu (vnm, rw->sw_if_index,
97 vnet_link_to_mtu (linkt));
101 vnet_rewrite_for_sw_interface (vnet_main_t * vnm,
102 vnet_link_t link_type,
106 vnet_rewrite_header_t * rw,
107 u32 max_rewrite_bytes)
110 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
111 vnet_hw_interface_class_t *hc =
112 vnet_get_hw_interface_class (vnm, hw->hw_class_index);
115 vnet_rewrite_init (vnm, sw_if_index, link_type, node_index,
116 vnet_tx_node_index_for_sw_interface (vnm, sw_if_index),
119 ASSERT (hc->build_rewrite);
120 rewrite = hc->build_rewrite (vnm, sw_if_index, link_type, dst_address);
122 ASSERT (vec_len (rewrite) < max_rewrite_bytes);
123 vnet_rewrite_set_data_internal (rw, max_rewrite_bytes, rewrite,
129 serialize_vnet_rewrite (serialize_main_t * m, va_list * va)
131 vnet_rewrite_header_t *rw = va_arg (*va, vnet_rewrite_header_t *);
132 u32 max_data_bytes = va_arg (*va, u32);
135 serialize_integer (m, rw->sw_if_index, sizeof (rw->sw_if_index));
136 serialize_integer (m, rw->data_bytes, sizeof (rw->data_bytes));
137 serialize_integer (m, rw->max_l3_packet_bytes,
138 sizeof (rw->max_l3_packet_bytes));
139 p = serialize_get (m, rw->data_bytes);
140 clib_memcpy (p, vnet_rewrite_get_data_internal (rw, max_data_bytes),
145 unserialize_vnet_rewrite (serialize_main_t * m, va_list * va)
147 vnet_rewrite_header_t *rw = va_arg (*va, vnet_rewrite_header_t *);
148 u32 max_data_bytes = va_arg (*va, u32);
151 /* It is up to user to fill these in. */
154 unserialize_integer (m, &rw->sw_if_index, sizeof (rw->sw_if_index));
155 unserialize_integer (m, &rw->data_bytes, sizeof (rw->data_bytes));
156 unserialize_integer (m, &rw->max_l3_packet_bytes,
157 sizeof (rw->max_l3_packet_bytes));
158 p = unserialize_get (m, rw->data_bytes);
159 clib_memcpy (vnet_rewrite_get_data_internal (rw, max_data_bytes), p,
164 vnet_build_rewrite_for_sw_interface (vnet_main_t * vnm,
166 vnet_link_t link_type,
167 const void *dst_address)
169 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
170 vnet_hw_interface_class_t *hc =
171 vnet_get_hw_interface_class (vnm, hw->hw_class_index);
173 ASSERT (hc->build_rewrite);
174 return (hc->build_rewrite (vnm, sw_if_index, link_type, dst_address));
179 vnet_update_adjacency_for_sw_interface (vnet_main_t * vnm,
180 u32 sw_if_index, u32 ai)
182 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
183 vnet_hw_interface_class_t *hc =
184 vnet_get_hw_interface_class (vnm, hw->hw_class_index);
186 ASSERT (hc->update_adjacency);
187 hc->update_adjacency (vnm, sw_if_index, ai);
191 * fd.io coding-style-patch-verification: ON
194 * eval: (c-set-style "gnu")