1 files changed, 79 insertions, 0 deletions
diff --git a/plugins/vcgn-plugin/vcgn/cnat_global.c b/plugins/vcgn-plugin/vcgn/cnat_global.c
new file mode 100644
index 00000000000..7177083466e
--- /dev/null
+++ b/plugins/vcgn-plugin/vcgn/cnat_global.c
@@ -0,0 +1,79 @@
+/* 
+ *------------------------------------------------------------------
+ * 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));
+}
+