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             :  * ppp_pg.c: packet generator ppp interface
      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 <vlib/vlib.h>
      41             : #include <vnet/pg/pg.h>
      42             : #include <vnet/ppp/ppp.h>
      43             : 
      44             : typedef struct
      45             : {
      46             :   pg_edit_t address;
      47             :   pg_edit_t control;
      48             :   pg_edit_t protocol;
      49             : } pg_ppp_header_t;
      50             : 
      51             : static inline void
      52           0 : pg_ppp_header_init (pg_ppp_header_t * e)
      53             : {
      54           0 :   pg_edit_init (&e->address, ppp_header_t, address);
      55           0 :   pg_edit_init (&e->control, ppp_header_t, control);
      56           0 :   pg_edit_init (&e->protocol, ppp_header_t, protocol);
      57           0 : }
      58             : 
      59             : uword
      60           0 : unformat_pg_ppp_header (unformat_input_t * input, va_list * args)
      61             : {
      62           0 :   pg_stream_t *s = va_arg (*args, pg_stream_t *);
      63             :   pg_ppp_header_t *h;
      64             :   u32 group_index, error;
      65             : 
      66           0 :   h = pg_create_edit_group (s, sizeof (h[0]), sizeof (ppp_header_t),
      67             :                             &group_index);
      68           0 :   pg_ppp_header_init (h);
      69             : 
      70           0 :   pg_edit_set_fixed (&h->address, 0xff);
      71           0 :   pg_edit_set_fixed (&h->control, 0x03);
      72             : 
      73           0 :   error = 1;
      74           0 :   if (!unformat (input, "%U",
      75             :                  unformat_pg_edit,
      76             :                  unformat_ppp_protocol_net_byte_order, &h->protocol))
      77           0 :     goto done;
      78             : 
      79             :   {
      80           0 :     ppp_main_t *pm = &ppp_main;
      81           0 :     ppp_protocol_info_t *pi = 0;
      82           0 :     pg_node_t *pg_node = 0;
      83             : 
      84           0 :     if (h->protocol.type == PG_EDIT_FIXED)
      85             :       {
      86           0 :         u16 t = *(u16 *) h->protocol.values[PG_EDIT_LO];
      87           0 :         pi = ppp_get_protocol_info (pm, clib_net_to_host_u16 (t));
      88           0 :         if (pi && pi->node_index != ~0)
      89           0 :           pg_node = pg_get_node (pi->node_index);
      90             :       }
      91             : 
      92           0 :     if (pg_node && pg_node->unformat_edit
      93           0 :         && unformat_user (input, pg_node->unformat_edit, s))
      94             :       ;
      95             : 
      96           0 :     else if (!unformat_user (input, unformat_pg_payload, s))
      97           0 :       goto done;
      98             :   }
      99             : 
     100           0 :   error = 0;
     101           0 : done:
     102           0 :   if (error)
     103           0 :     pg_free_edit_group (s);
     104           0 :   return error == 0;
     105             : }
     106             : 
     107             : 
     108             : /*
     109             :  * fd.io coding-style-patch-verification: ON
     110             :  *
     111             :  * Local Variables:
     112             :  * eval: (c-set-style "gnu")
     113             :  * End:
     114             :  */