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/*
* Copyright (c) 2017 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.
*/
/*
* cicn_parser.c: Fast-path, vpp-aware ICN packet parser, used in cicn forwarder.
*/
#include <stdlib.h>
#include <errno.h>
#include <assert.h>
#include <inttypes.h>
#include <vlib/vlib.h>
#include <cicn/cicn.h>
#include <cicn/cicn_parser.h>
/*
* Given name string in ascii /a/b/... format, convert to wire-format
* list of components (without wrapper tlv), in obuf.
* If is_chunk_name, make last component chunk_type instead of generic type.
*/
int
cicn_parse_name_comps_from_str_generic (uint8_t * obuf, int obuflen,
const char *str, int chunk_name,
cicn_rd_t * cicn_rd)
{
int ux_rc;
cicn_rc_e crc = CICN_RC_OK;
int ret;
ret =
cicn_parse_name_comps_from_str_inline (obuf, obuflen, str, chunk_name);
if (ret >= 0)
{
ux_rc = AOK;
}
else
{
ux_rc = -ret;
switch (ux_rc)
{
case ENOSPC:
crc = CICN_RC_FIB_PFX_SIZE_LIMIT;
break;
default:
break;
}
}
cicn_rd_set (cicn_rd, crc, ux_rc);
return (ret);
}
/*
* Given name string in ascii /a/b/... format, convert to wire-format
* list of components (without wrapper tlv), in obuf.
*/
int
cicn_parse_name_comps_from_str (uint8_t * obuf, int obuflen, const char *str,
cicn_rd_t * cicn_rd)
{
int ret;
ret =
cicn_parse_name_comps_from_str_generic (obuf, obuflen, str,
0 /*!chunk_name */ , cicn_rd);
return (ret);
}
/*
* Given name string in ascii /a/b/... format, convert to full
* wire-format (including wrapper tlv), in obuf.
* If is_chunk_name, make last component chunk_type instead of generic type.
*/
int
cicn_parse_name_from_str (uint8_t * obuf, int obuflen, const char *str,
int is_chunk_name, cicn_rd_t * cicn_rd)
{
int ret;
if (obuflen < CICN_TLV_HDR_LEN)
{
cicn_rd_set (cicn_rd, CICN_RC_OK, EINVAL);
return (-cicn_rd->rd_ux_rc);
}
C_PUTINT16 (obuf, CICN_TLV_NAME);
ret =
cicn_parse_name_comps_from_str_generic (obuf + CICN_TLV_HDR_LEN,
obuflen - CICN_TLV_HDR_LEN, str,
is_chunk_name, cicn_rd);
if (ret >= 0)
{ // length
C_PUTINT16 (&obuf[CICN_TLV_TYPE_LEN], ret);
ret += CICN_TLV_HDR_LEN;
}
return (ret);
}
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