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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_hello_inlines.h - ICN hello protocol packet forwarding inlines
*/
#ifndef _CICN_HELLO_INLINES_H_
#define _CICN_HELLO_INLINES_H_ 1
#if !CICN_VPP_PLUGIN
#error "cicn-internal file included externally"
#endif
#include "cicn.h"
/*
* Is the supplied pkt_type/name a hello?
* Called from forwarding path, so performance sensitive
*/
static inline int
cicn_hello_match (const cicn_face_db_entry_t * inface,
u8 pkt_type, const u8 * nameptr, u32 namelen,
const cicn_hello_name_t * hello_template, u64 * seq_num_res)
{
const cicn_hello_fcd_t *fcd;
const u8 *in_fid_tlv;
u16 in_tlv_len;
switch (pkt_type)
{
case CICN_PKT_TYPE_CONTROL_REQUEST:
fcd = &inface->fe_ha_fcd_loc; // request for our name
break;
case CICN_PKT_TYPE_CONTROL_REPLY:
fcd = &inface->fe_ha_fcd_nbr; // reply to our request for nbr name
break;
default:
return (0); // not a hello message
}
if (fcd->fcd_v_len == 0)
{ // name not currently initialized
return (0);
}
if (namelen != CICN_HELLO_NAME_TOT_FLEN)
{
return (0);
}
if (memcmp (nameptr, &inface->fe_ha_name_cmn[0],
sizeof (inface->fe_ha_name_cmn)))
{
return (0);
}
in_fid_tlv = &nameptr[CICN_HELLO_NAME_CMN_FLEN];
C_GETINT16 (in_tlv_len, &in_fid_tlv[CICN_TLV_TYPE_LEN]);
if (in_tlv_len != fcd->fcd_v_len)
{
return (0);
}
if (memcmp (&in_fid_tlv[CICN_TLV_HDR_LEN], &fcd->fcd_v[0],
fcd->fcd_v_len) != 0)
{
return (0);
}
if (seq_num_res)
{ /* Extract the seq num from the response */
u64 seq_num;
C_GETINT64 (seq_num, &nameptr[namelen - CICN_HELLO_NAME_SEQ_V_LEN]);
*seq_num_res = seq_num;
}
return (1); // valid hello imsg/dmsg name for this face
}
#endif // _CICN_HELLO_INLINES_H_
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