ea3e1fc875
directory and GNU autotools setup. Change-Id: I6c59d1297389c9413db0c0b9bdf3b759080bf1b8 Signed-off-by: Ole Troan <ot@cisco.com>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
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*------------------------------------------------------------------
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* cnat_global.c - global variables
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*
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* Copyright (c) 2008-2009, 2012 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*------------------------------------------------------------------
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*/
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/* gloable variables */
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#include <vlib/vlib.h>
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#include <vnet/vnet.h>
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#include <vppinfra/error.h>
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#include <vnet/buffer.h>
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#include "dslite_defs.h"
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#include "tcp_header_definitions.h"
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u32 cnat_current_time;
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u8 nfv9_configured = 0;
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/* ctx/sf alloc error counters */
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u32 null_enq_pkt;
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u32 null_deq_pkt;
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u32 null_enq_ctx;
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u32 null_deq_ctx;
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u32 null_enq_wqe;
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u32 null_deq_wqe;
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u32 ctx_alloc_errs;
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u32 sf_alloc_errs;
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u32 rcv_pkt_errs;
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/* TOBE_PORTED : Remove following once we bring DSLite */
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u32 dslite_config_debug_level = 1;
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u32 dslite_data_path_debug_level = 1;
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u32 dslite_defrag_debug_level = 1;
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u32 dslite_debug_level = 1;
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dslite_table_entry_t *dslite_table_db_ptr;
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/*
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* ipv4_decr_ttl_n_calc_csum()
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* - It decrements the TTL and calculates the incremental IPv4 checksum
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*/
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/* TOBE_PORTED: Following is in cnat_util.c */
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always_inline __attribute__((unused))
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void ipv4_decr_ttl_n_calc_csum(ipv4_header *ipv4)
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{
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u32 checksum;
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u16 old;
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u16 ttl;
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ttl = ipv4->ttl;
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old = clib_net_to_host_u16(ttl);
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/* Decrement TTL */
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ipv4->ttl--;
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/* Calculate incremental checksum */
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checksum = old + (~clib_net_to_host_u16(ttl) & 0xFFFF);
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checksum += clib_net_to_host_u16(ipv4->checksum);
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checksum = (checksum & 0xFFFF) + (checksum >> 16);
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ipv4->checksum = clib_host_to_net_u32(checksum + (checksum >> 16));
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}
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