/* * pg.c: packet generator for L2TPv3 header * * Copyright (c) 2013 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. */ #include <vlib/vlib.h> #include <vnet/pg/pg.h> #include <l2tp/l2tp.h> typedef struct { pg_edit_t session_id; pg_edit_t cookie; } pg_l2tp_header_t; typedef struct { pg_edit_t l2_sublayer; } pg_l2tp_header_l2_sublayer_t; static inline void pg_l2tp_header_init (pg_l2tp_header_t * e) { pg_edit_init (&e->session_id, l2tpv3_header_t, session_id); pg_edit_init (&e->cookie, l2tpv3_header_t, cookie); } uword unformat_pg_l2tp_header (unformat_input_t * input, va_list * args) { pg_stream_t *s = va_arg (*args, pg_stream_t *); pg_l2tp_header_t *h; u32 group_index, error; vlib_main_t *vm = vlib_get_main (); h = pg_create_edit_group (s, sizeof (h[0]), sizeof (l2tpv3_header_t) - sizeof (u32), &group_index); pg_l2tp_header_init (h); error = 1; /* session id and cookie are required */ if (!unformat (input, "L2TP: session_id %U cookie %U", unformat_pg_edit, unformat_pg_number, &h->session_id, unformat_pg_edit, unformat_pg_number, &h->cookie)) { goto done; } /* "l2_sublayer <value>" is optional */ if (unformat (input, "l2_sublayer")) { pg_l2tp_header_l2_sublayer_t *h2; h2 = pg_add_edits (s, sizeof (h2[0]), sizeof (u32), group_index); pg_edit_init (&h2->l2_sublayer, l2tpv3_header_t, l2_specific_sublayer); if (!unformat_user (input, unformat_pg_edit, unformat_pg_number, &h2->l2_sublayer)) { goto done; } } /* Parse an ethernet header if it is present */ { pg_node_t *pg_node = 0; vlib_node_t *eth_lookup_node; eth_lookup_node = vlib_get_node_by_name (vm, (u8 *) "ethernet-input"); ASSERT (eth_lookup_node); pg_node = pg_get_node (eth_lookup_node->index); if (pg_node && pg_node->unformat_edit && unformat_user (input, pg_node->unformat_edit, s)) ; } error = 0; done: if (error) pg_free_edit_group (s); return error == 0; } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */