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/*
*------------------------------------------------------------------
* cnat_global.c - global variables
*
* Copyright (c) 2008-2009, 2012 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.
*------------------------------------------------------------------
*/
/* gloable variables */
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vppinfra/error.h>
#include <vnet/buffer.h>
#include "dslite_defs.h"
#include "tcp_header_definitions.h"
u32 cnat_current_time;
u8 nfv9_configured = 0;
/* ctx/sf alloc error counters */
u32 null_enq_pkt;
u32 null_deq_pkt;
u32 null_enq_ctx;
u32 null_deq_ctx;
u32 null_enq_wqe;
u32 null_deq_wqe;
u32 ctx_alloc_errs;
u32 sf_alloc_errs;
u32 rcv_pkt_errs;
/* TOBE_PORTED : Remove following once we bring DSLite */
u32 dslite_config_debug_level = 1;
u32 dslite_data_path_debug_level = 1;
u32 dslite_defrag_debug_level = 1;
u32 dslite_debug_level = 1;
dslite_table_entry_t *dslite_table_db_ptr;
/*
* ipv4_decr_ttl_n_calc_csum()
* - It decrements the TTL and calculates the incremental IPv4 checksum
*/
/* TOBE_PORTED: Following is in cnat_util.c */
always_inline __attribute__((unused))
void ipv4_decr_ttl_n_calc_csum(ipv4_header *ipv4)
{
u32 checksum;
u16 old;
u16 ttl;
ttl = ipv4->ttl;
old = clib_net_to_host_u16(ttl);
/* Decrement TTL */
ipv4->ttl--;
/* Calculate incremental checksum */
checksum = old + (~clib_net_to_host_u16(ttl) & 0xFFFF);
checksum += clib_net_to_host_u16(ipv4->checksum);
checksum = (checksum & 0xFFFF) + (checksum >> 16);
ipv4->checksum = clib_host_to_net_u32(checksum + (checksum >> 16));
}
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