src/vnet/adj/adj_rewrite.c

   1 /*
   2  * Copyright (c) 2016 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 #include <vnet/adj/adj.h>
  17 #include <vnet/adj/adj_internal.h>
  18
  19 /**
  20  * adj_rewrite_add_and_lock
  21  *
  22  * A rewrite sub-type has the rewrite string provided, but no key
  23  */
  24 adj_index_t
  25 adj_rewrite_add_and_lock (fib_protocol_t nh_proto,
  26                           vnet_link_t link_type,
  27                           u32 sw_if_index,
  28                           u8 *rewrite)
  29 {
  30     ip_adjacency_t *adj;
  31
  32     adj = adj_alloc(nh_proto);
  33
  34     adj->lookup_next_index = IP_LOOKUP_NEXT_REWRITE;
  35     memset(&adj->sub_type.nbr.next_hop, 0, sizeof(adj->sub_type.nbr.next_hop));
  36     adj->ia_link = link_type;
  37     adj->ia_nh_proto = nh_proto;
  38     adj->rewrite_header.sw_if_index = sw_if_index;
  39
  40     ASSERT(NULL != rewrite);
  41
  42     vnet_rewrite_for_sw_interface(vnet_get_main(),
  43                                   link_type,
  44                                   adj->rewrite_header.sw_if_index,
  45                                   adj_get_rewrite_node(link_type),
  46                                   rewrite,
  47                                   &adj->rewrite_header,
  48                                   sizeof (adj->rewrite_data));
  49
  50     adj_lock(adj_get_index(adj));
  51
  52     return (adj_get_index(adj));
  53 }