+++ /dev/null
-/*
- * Copyright (c) 2015 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-/*
- * rewrite.c: packet rewrite
- *
- * Copyright (c) 2008 Eliot Dresselhaus
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include <vnet/vnet.h>
-#include <vnet/ip/lookup.h>
-
-void
-vnet_rewrite_copy_slow_path (vnet_rewrite_data_t * p0,
- vnet_rewrite_data_t * rw0,
- word n_left, uword most_likely_size)
-{
- uword n_done =
- round_pow2 (most_likely_size, sizeof (rw0[0])) / sizeof (rw0[0]);
-
- p0 -= n_done;
- rw0 -= n_done;
-
- /* As we enter the cleanup loop, p0 and rw0 point to the last chunk written
- by the fast path. Hence, the constant 1, which the
- vnet_rewrite_copy_one macro renders as p0[-1] = rw0[-1]. */
-
- while (n_left > 0)
- {
- vnet_rewrite_copy_one (p0, rw0, 1);
- p0--;
- rw0--;
- n_left--;
- }
-}
-
-u8 *
-format_vnet_rewrite (u8 * s, va_list * args)
-{
- vnet_rewrite_header_t *rw = va_arg (*args, vnet_rewrite_header_t *);
- u32 max_data_bytes = va_arg (*args, u32);
- CLIB_UNUSED (uword indent) = va_arg (*args, u32);
- vnet_main_t *vnm = vnet_get_main ();
-
- if (rw->sw_if_index != ~0)
- {
- vnet_sw_interface_t *si;
- si = vnet_get_sw_interface_safe (vnm, rw->sw_if_index);
- if (NULL != si)
- s = format (s, "%U: ", format_vnet_sw_interface_name, vnm, si);
- else
- s = format (s, "DELETED:%d", rw->sw_if_index);
- }
-
- /* Format rewrite string. */
- if (rw->data_bytes > 0)
-
- s = format (s, "%U",
- format_hex_bytes,
- rw->data + max_data_bytes - rw->data_bytes, rw->data_bytes);
-
- return s;
-}
-
-u32
-vnet_tx_node_index_for_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
-{
- vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
- return (hw->output_node_index);
-}
-
-void
-vnet_rewrite_init (vnet_main_t * vnm,
- u32 sw_if_index,
- u32 this_node, u32 next_node, vnet_rewrite_header_t * rw)
-{
- rw->sw_if_index = sw_if_index;
- rw->next_index = vlib_node_add_next (vnm->vlib_main, this_node, next_node);
- rw->max_l3_packet_bytes =
- vnet_sw_interface_get_mtu (vnm, sw_if_index, VLIB_TX);
-}
-
-void
-vnet_rewrite_for_sw_interface (vnet_main_t * vnm,
- vnet_link_t link_type,
- u32 sw_if_index,
- u32 node_index,
- void *dst_address,
- vnet_rewrite_header_t * rw,
- u32 max_rewrite_bytes)
-{
-
- vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
- vnet_hw_interface_class_t *hc =
- vnet_get_hw_interface_class (vnm, hw->hw_class_index);
- u8 *rewrite = NULL;
-
- vnet_rewrite_init (vnm, sw_if_index, node_index,
- vnet_tx_node_index_for_sw_interface (vnm, sw_if_index),
- rw);
-
- ASSERT (hc->build_rewrite);
- rewrite = hc->build_rewrite (vnm, sw_if_index, link_type, dst_address);
-
- ASSERT (vec_len (rewrite) < max_rewrite_bytes);
- vnet_rewrite_set_data_internal (rw, max_rewrite_bytes, rewrite,
- vec_len (rewrite));
- vec_free (rewrite);
-}
-
-void
-vnet_rewrite_for_tunnel (vnet_main_t * vnm,
- u32 tx_sw_if_index,
- u32 rewrite_node_index,
- u32 post_rewrite_node_index,
- vnet_rewrite_header_t * rw,
- u8 * rewrite_data, u32 rewrite_length)
-{
- ip_adjacency_t *adj = 0;
- /*
- * Installed into vnet_buffer(b)->sw_if_index[VLIB_TX] e.g.
- * by ip4_rewrite_inline. If the post-rewrite node injects into
- * ipX-forward, this will be interpreted as a FIB number.
- */
- rw->sw_if_index = tx_sw_if_index;
- rw->next_index = vlib_node_add_next (vnm->vlib_main, rewrite_node_index,
- post_rewrite_node_index);
- rw->max_l3_packet_bytes = (u16) ~ 0; /* we can't know at this point */
-
- ASSERT (rewrite_length < sizeof (adj->rewrite_data));
- /* Leave room for ethernet + VLAN tag */
- vnet_rewrite_set_data_internal (rw, sizeof (adj->rewrite_data),
- rewrite_data, rewrite_length);
-}
-
-void
-serialize_vnet_rewrite (serialize_main_t * m, va_list * va)
-{
- vnet_rewrite_header_t *rw = va_arg (*va, vnet_rewrite_header_t *);
- u32 max_data_bytes = va_arg (*va, u32);
- u8 *p;
-
- serialize_integer (m, rw->sw_if_index, sizeof (rw->sw_if_index));
- serialize_integer (m, rw->data_bytes, sizeof (rw->data_bytes));
- serialize_integer (m, rw->max_l3_packet_bytes,
- sizeof (rw->max_l3_packet_bytes));
- p = serialize_get (m, rw->data_bytes);
- clib_memcpy (p, vnet_rewrite_get_data_internal (rw, max_data_bytes),
- rw->data_bytes);
-}
-
-void
-unserialize_vnet_rewrite (serialize_main_t * m, va_list * va)
-{
- vnet_rewrite_header_t *rw = va_arg (*va, vnet_rewrite_header_t *);
- u32 max_data_bytes = va_arg (*va, u32);
- u8 *p;
-
- /* It is up to user to fill these in. */
- rw->next_index = ~0;
-
- unserialize_integer (m, &rw->sw_if_index, sizeof (rw->sw_if_index));
- unserialize_integer (m, &rw->data_bytes, sizeof (rw->data_bytes));
- unserialize_integer (m, &rw->max_l3_packet_bytes,
- sizeof (rw->max_l3_packet_bytes));
- p = unserialize_get (m, rw->data_bytes);
- clib_memcpy (vnet_rewrite_get_data_internal (rw, max_data_bytes), p,
- rw->data_bytes);
-}
-
-u8 *
-vnet_build_rewrite_for_sw_interface (vnet_main_t * vnm,
- u32 sw_if_index,
- vnet_link_t link_type,
- const void *dst_address)
-{
- vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
- vnet_hw_interface_class_t *hc =
- vnet_get_hw_interface_class (vnm, hw->hw_class_index);
-
- ASSERT (hc->build_rewrite);
- return (hc->build_rewrite (vnm, sw_if_index, link_type, dst_address));
-}
-
-
-void
-vnet_update_adjacency_for_sw_interface (vnet_main_t * vnm,
- u32 sw_if_index, u32 ai)
-{
- vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
- vnet_hw_interface_class_t *hc =
- vnet_get_hw_interface_class (vnm, hw->hw_class_index);
-
- ASSERT (hc->update_adjacency);
- hc->update_adjacency (vnm, sw_if_index, ai);
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff