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_flags (u8 *s, va_list *ap)
46 vnet_rewrite_flags_t f = va_arg (*ap, int);
48 if (f & VNET_REWRITE_HAS_FEATURES)
49 s = format (s, "features ");
50 if (f & VNET_REWRITE_FIXUP_IP4_O_4)
51 s = format (s, "fixup-ip4o4 ");
52 if (f & VNET_REWRITE_FIXUP_FLOW_HASH)
53 s = format (s, "fixup-flow-hash ");
59 format_vnet_rewrite (u8 * s, va_list * args)
61 vnet_rewrite_header_t *rw = va_arg (*args, vnet_rewrite_header_t *);
62 u32 max_data_bytes = va_arg (*args, u32);
63 CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
64 vnet_main_t *vnm = vnet_get_main ();
66 ASSERT (rw->data_bytes <= max_data_bytes);
68 if (rw->sw_if_index != ~0)
70 vnet_sw_interface_t *si;
71 si = vnet_get_sw_interface_or_null (vnm, rw->sw_if_index);
73 s = format (s, "%U:", format_vnet_sw_interface_name, vnm, si);
75 s = format (s, "DELETED:%d", rw->sw_if_index);
78 s = format (s, " mtu:%d next:%d", rw->max_l3_packet_bytes, rw->next_index);
79 s = format (s, " flags:[%U]", format_vnet_rewrite_flags, rw->flags);
81 /* Format rewrite string. */
82 if (rw->data_bytes > 0)
83 s = format (s, " %U", format_hex_bytes, rw->data, rw->data_bytes);
89 vnet_tx_node_index_for_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
91 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
92 return (hw->output_node_index);
96 vnet_rewrite_init (vnet_main_t * vnm,
99 u32 this_node, u32 next_node, vnet_rewrite_header_t * rw)
101 rw->sw_if_index = sw_if_index;
102 rw->next_index = vlib_node_add_next (vnm->vlib_main, this_node, next_node);
103 rw->max_l3_packet_bytes =
104 vnet_sw_interface_get_mtu (vnm, sw_if_index, vnet_link_to_mtu (linkt));
108 vnet_rewrite_update_mtu (vnet_main_t * vnm, vnet_link_t linkt,
109 vnet_rewrite_header_t * rw)
111 rw->max_l3_packet_bytes =
112 vnet_sw_interface_get_mtu (vnm, rw->sw_if_index,
113 vnet_link_to_mtu (linkt));
117 vnet_rewrite_for_sw_interface (vnet_main_t * vnm,
118 vnet_link_t link_type,
122 vnet_rewrite_header_t * rw,
123 u32 max_rewrite_bytes)
126 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
127 vnet_hw_interface_class_t *hc =
128 vnet_get_hw_interface_class (vnm, hw->hw_class_index);
131 vnet_rewrite_init (vnm, sw_if_index, link_type, node_index,
132 vnet_tx_node_index_for_sw_interface (vnm, sw_if_index),
135 ASSERT (hc->build_rewrite);
136 rewrite = hc->build_rewrite (vnm, sw_if_index, link_type, dst_address);
138 ASSERT (vec_len (rewrite) < max_rewrite_bytes);
139 vnet_rewrite_set_data_internal (rw, max_rewrite_bytes, rewrite,
145 serialize_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 serialize_integer (m, rw->sw_if_index, sizeof (rw->sw_if_index));
152 serialize_integer (m, rw->data_bytes, sizeof (rw->data_bytes));
153 serialize_integer (m, rw->max_l3_packet_bytes,
154 sizeof (rw->max_l3_packet_bytes));
155 p = serialize_get (m, rw->data_bytes);
156 clib_memcpy (p, vnet_rewrite_get_data_internal (rw, max_data_bytes),
161 unserialize_vnet_rewrite (serialize_main_t * m, va_list * va)
163 vnet_rewrite_header_t *rw = va_arg (*va, vnet_rewrite_header_t *);
164 u32 max_data_bytes = va_arg (*va, u32);
167 /* It is up to user to fill these in. */
170 unserialize_integer (m, &rw->sw_if_index, sizeof (rw->sw_if_index));
171 unserialize_integer (m, &rw->data_bytes, sizeof (rw->data_bytes));
172 unserialize_integer (m, &rw->max_l3_packet_bytes,
173 sizeof (rw->max_l3_packet_bytes));
174 p = unserialize_get (m, rw->data_bytes);
175 clib_memcpy (vnet_rewrite_get_data_internal (rw, max_data_bytes), p,
180 vnet_build_rewrite_for_sw_interface (vnet_main_t * vnm,
182 vnet_link_t link_type,
183 const void *dst_address)
185 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
186 vnet_hw_interface_class_t *hc =
187 vnet_get_hw_interface_class (vnm, hw->hw_class_index);
189 ASSERT (hc->build_rewrite);
190 return (hc->build_rewrite (vnm, sw_if_index, link_type, dst_address));
195 vnet_update_adjacency_for_sw_interface (vnet_main_t * vnm,
196 u32 sw_if_index, u32 ai)
198 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
199 vnet_hw_interface_class_t *hc =
200 vnet_get_hw_interface_class (vnm, hw->hw_class_index);
202 ASSERT (hc->update_adjacency);
203 hc->update_adjacency (vnm, sw_if_index, ai);
207 * fd.io coding-style-patch-verification: ON
210 * eval: (c-set-style "gnu")