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diff --git a/src/plugins/nat/lib/log.h b/src/plugins/nat/lib/log.h
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+/*
+ * Copyright (c) 2020 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.
+ */
+/**
+ * @file
+ * @brief NAT port/address allocation lib
+ */
+#ifndef included_nat_log_h__
+#define included_nat_log_h__
+
+#include <vppinfra/elog.h>
+
+#define foreach_nat_log_level \
+ _ (0x00, LOG_NONE) \
+ _ (0x01, LOG_ERROR) \
+ _ (0x02, LOG_WARNING) \
+ _ (0x03, LOG_NOTICE) \
+ _ (0x04, LOG_INFO) \
+ _ (0x05, LOG_DEBUG)
+
+typedef enum nat_log_level_t_
+{
+#define _(n, f) NAT_##f = n,
+ foreach_nat_log_level
+#undef _
+} nat_log_level_t;
+
+#define nat_elog(_pm, _level, _str) \
+ do \
+ { \
+ if (PREDICT_FALSE (_pm->log_level >= _level)) \
+ { \
+ ELOG_TYPE_DECLARE (e) = { \
+ .format = "nat-msg " _str, \
+ .format_args = "", \
+ }; \
+ ELOG_DATA (&vlib_global_main.elog_main, e); \
+ } \
+ } \
+ while (0);
+
+#define nat_elog_addr(_pm, _level, _str, _addr) \
+ do \
+ { \
+ if (PREDICT_FALSE (_pm->log_level >= _level)) \
+ { \
+ ELOG_TYPE_DECLARE (e) = { \
+ .format = "nat-msg " _str " %d.%d.%d.%d", \
+ .format_args = "i1i1i1i1", \
+ }; \
+ CLIB_PACKED (struct { \
+ u8 oct1; \
+ u8 oct2; \
+ u8 oct3; \
+ u8 oct4; \
+ }) * \
+ ed; \
+ ed = ELOG_DATA (&vlib_global_main.elog_main, e); \
+ ed->oct4 = _addr >> 24; \
+ ed->oct3 = _addr >> 16; \
+ ed->oct2 = _addr >> 8; \
+ ed->oct1 = _addr; \
+ } \
+ } \
+ while (0);
+
+#define nat_elog_debug_handoff(_pm, _str, _tid, _fib, _src, _dst) \
+ do \
+ { \
+ if (PREDICT_FALSE (_pm->log_level >= NAT_LOG_DEBUG)) \
+ { \
+ ELOG_TYPE_DECLARE (e) = { \
+ .format = "nat-msg " _str " ip src: %d.%d.%d.%d dst: %d.%d.%d.%d" \
+ " tid from: %d to: %d fib: %d", \
+ .format_args = "i1i1i1i1i1i1i1i1i4i4i4", \
+ }; \
+ CLIB_PACKED (struct { \
+ u8 src_oct1; \
+ u8 src_oct2; \
+ u8 src_oct3; \
+ u8 src_oct4; \
+ u8 dst_oct1; \
+ u8 dst_oct2; \
+ u8 dst_oct3; \
+ u8 dst_oct4; \
+ u32 ftid; \
+ u32 ttid; \
+ u32 fib; \
+ }) * \
+ ed; \
+ ed = ELOG_DATA (&vlib_global_main.elog_main, e); \
+ ed->src_oct1 = _src >> 24; \
+ ed->src_oct2 = _src >> 16; \
+ ed->src_oct3 = _src >> 8; \
+ ed->src_oct4 = _src; \
+ ed->dst_oct1 = _dst >> 24; \
+ ed->dst_oct2 = _dst >> 16; \
+ ed->dst_oct3 = _dst >> 8; \
+ ed->dst_oct4 = _dst; \
+ ed->ftid = vlib_get_thread_index (); \
+ ed->ttid = _tid; \
+ ed->fib = _fib; \
+ } \
+ } \
+ while (0);
+
+#define nat_elog_debug_handoff_v2(_pm, _str, _prt, _fib, _src, _dst) \
+ do \
+ { \
+ if (PREDICT_FALSE (_pm->log_level >= NAT_LOG_DEBUG)) \
+ { \
+ ELOG_TYPE_DECLARE (e) = { \
+ .format = \
+ "nat-msg " _str " ip_src:%d.%d.%d.%d ip_dst:%d.%d.%d.%d" \
+ " tid:%d prt:%d fib:%d", \
+ .format_args = "i1i1i1i1i1i1i1i1i4i4i4", \
+ }; \
+ CLIB_PACKED (struct { \
+ u8 src_oct1; \
+ u8 src_oct2; \
+ u8 src_oct3; \
+ u8 src_oct4; \
+ u8 dst_oct1; \
+ u8 dst_oct2; \
+ u8 dst_oct3; \
+ u8 dst_oct4; \
+ u32 tid; \
+ u32 prt; \
+ u32 fib; \
+ }) * \
+ ed; \
+ ed = ELOG_DATA (&vlib_global_main.elog_main, e); \
+ ed->src_oct1 = _src >> 24; \
+ ed->src_oct2 = _src >> 16; \
+ ed->src_oct3 = _src >> 8; \
+ ed->src_oct4 = _src; \
+ ed->dst_oct1 = _dst >> 24; \
+ ed->dst_oct2 = _dst >> 16; \
+ ed->dst_oct3 = _dst >> 8; \
+ ed->dst_oct4 = _dst; \
+ ed->tid = vlib_get_thread_index (); \
+ ed->prt = _prt; \
+ ed->fib = _fib; \
+ } \
+ } \
+ while (0);
+
+#define nat_elog_X1(_pm, _level, _fmt, _arg, _val1) \
+ do \
+ { \
+ if (PREDICT_FALSE (_pm->log_level >= _level)) \
+ { \
+ ELOG_TYPE_DECLARE (e) = { \
+ .format = "nat-msg " _fmt, \
+ .format_args = _arg, \
+ }; \
+ CLIB_PACKED (struct { typeof (_val1) val1; }) * ed; \
+ ed = ELOG_DATA (&vlib_global_main.elog_main, e); \
+ ed->val1 = _val1; \
+ } \
+ } \
+ while (0);
+
+#define nat_elog_notice(_pm, nat_elog_str) \
+ nat_elog (_pm, NAT_LOG_INFO, "[notice] " nat_elog_str)
+#define nat_elog_warn(_pm, nat_elog_str) \
+ nat_elog (_pm, NAT_LOG_WARNING, "[warning] " nat_elog_str)
+#define nat_elog_err(_pm, nat_elog_str) \
+ nat_elog (_pm, NAT_LOG_ERROR, "[error] " nat_elog_str)
+#define nat_elog_debug(_pm, nat_elog_str) \
+ nat_elog (_pm, NAT_LOG_DEBUG, "[debug] " nat_elog_str)
+#define nat_elog_info(_pm, nat_elog_str) \
+ nat_elog (_pm, NAT_LOG_INFO, "[info] " nat_elog_str)
+
+#define nat_elog_notice_X1(_pm, nat_elog_fmt_str, nat_elog_fmt_arg, \
+ nat_elog_val1) \
+ nat_elog_X1 (_pm, NAT_LOG_NOTICE, "[notice] " nat_elog_fmt_str, \
+ nat_elog_fmt_arg, nat_elog_val1)
+#define nat_elog_warn_X1(_pm, nat_elog_fmt_str, nat_elog_fmt_arg, \
+ nat_elog_val1) \
+ nat_elog_X1 (_pm, NAT_LOG_WARNING, "[warning] " nat_elog_fmt_str, \
+ nat_elog_fmt_arg, nat_elog_val1)
+#define nat_elog_err_X1(_pm, nat_elog_fmt_str, nat_elog_fmt_arg, \
+ nat_elog_val1) \
+ nat_elog_X1 (_pm, NAT_LOG_ERROR, "[error] " nat_elog_fmt_str, \
+ nat_elog_fmt_arg, nat_elog_val1)
+#define nat_elog_debug_X1(_pm, nat_elog_fmt_str, nat_elog_fmt_arg, \
+ nat_elog_val1) \
+ nat_elog_X1 (_pm, NAT_LOG_DEBUG, "[debug] " nat_elog_fmt_str, \
+ nat_elog_fmt_arg, nat_elog_val1)
+#define nat_elog_info_X1(_pm, nat_elog_fmt_str, nat_elog_fmt_arg, \
+ nat_elog_val1) \
+ nat_elog_X1 (_pm, NAT_LOG_INFO, "[info] " nat_elog_fmt_str, \
+ nat_elog_fmt_arg, nat_elog_val1)
+
+#endif /* included_nat_lib_h__ */
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */