NAT: syslog - sessions logging (VPP-1139)

Change-Id: I6e0b7cf37c1a9ac66f8ac011db29504e57844ee9
Signed-off-by: Matus Fabian <matfabia@cisco.com>

1 files changed, 290 insertions, 0 deletions

diff --git a/src/plugins/nat/nat_syslog.c b/src/plugins/nat/nat_syslog.c
new file mode 100644
index 00000000000..07fe2ea5808
--- /dev/null
+++ b/src/plugins/nat/nat_syslog.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright (c) 2018 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 syslog logging
+ */
+
+#include <vnet/fib/fib_table.h>
+#include <vnet/ip/ip.h>
+#include <vnet/syslog/syslog.h>
+
+#include <nat/nat_syslog.h>
+#include <nat/nat_inlines.h>
+
+
+#define NAT_FACILITY SYSLOG_FACILITY_LOCAL0
+
+#define NAT_APPNAME "NAT"
+
+#define SADD_SDEL_SEVERITY SYSLOG_SEVERITY_INFORMATIONAL
+#define APMADD_APMDEL_SEVERITY SYSLOG_SEVERITY_INFORMATIONAL
+
+#define SADD_MSGID "SADD"
+#define SDEL_MSGID "SDEL"
+#define APMADD_MSGID "APMADD"
+#define APMDEL_MSGID "APMDEL"
+
+#define NSESS_SDID "nsess"
+#define NAPMAP_SDID "napmap"
+
+#define SSUBIX_SDPARAM_NAME "SSUBIX"
+#define SVLAN_SDPARAM_NAME "SVLAN"
+#define IATYP_SDPARAM_NAME "IATYP"
+#define ISADDR_SDPARAM_NAME "ISADDR"
+#define ISPORT_SDPARAM_NAME "ISPORT"
+#define IDADDR_SDPARAM_NAME "IDADDR"
+#define IDPORT_SDPARAM_NAME "IDPORT"
+#define XATYP_SDPARAM_NAME "XATYP"
+#define XSADDR_SDPARAM_NAME "XSADDR"
+#define XSPORT_SDPARAM_NAME "XSPORT"
+#define XDADDR_SDPARAM_NAME "XDADDR"
+#define XDPORT_SDPARAM_NAME "XDPORT"
+#define PROTO_SDPARAM_NAME "PROTO"
+#define SV6ENC_SDPARAM_NAME "SV6ENC"
+
+#define IATYP_IPV4 "IPv4"
+#define IATYP_IPV6 "IPv6"
+
+static inline void
+nat_syslog_nat44_apmap (u32 ssubix, u32 sfibix, ip4_address_t * isaddr,
+			u16 isport, ip4_address_t * xsaddr, u16 xsport,
+			snat_protocol_t proto, u8 is_add,
+			ip6_address_t * sv6enc)
+{
+  syslog_msg_t syslog_msg;
+  fib_table_t *fib;
+
+  if (!syslog_is_enabled ())
+    return;
+
+  if (syslog_severity_filter_block (APMADD_APMDEL_SEVERITY))
+    return;
+
+  syslog_msg_init (&syslog_msg, NAT_FACILITY, APMADD_APMDEL_SEVERITY,
+		   NAT_APPNAME, is_add ? APMADD_MSGID : APMDEL_MSGID);
+
+  syslog_msg_sd_init (&syslog_msg, NAPMAP_SDID);
+  syslog_msg_add_sd_param (&syslog_msg, SSUBIX_SDPARAM_NAME, "%d", ssubix);
+  if (sv6enc)
+    {
+      syslog_msg_add_sd_param (&syslog_msg, SV6ENC_SDPARAM_NAME, "%U",
+			       format_ip6_address, sv6enc);
+    }
+  else
+    {
+      fib = fib_table_get (sfibix, FIB_PROTOCOL_IP4);
+      syslog_msg_add_sd_param (&syslog_msg, SVLAN_SDPARAM_NAME, "%d",
+			       fib->ft_table_id);
+    }
+  syslog_msg_add_sd_param (&syslog_msg, IATYP_SDPARAM_NAME, IATYP_IPV4);
+  syslog_msg_add_sd_param (&syslog_msg, ISADDR_SDPARAM_NAME, "%U",
+			   format_ip4_address, isaddr);
+  syslog_msg_add_sd_param (&syslog_msg, ISPORT_SDPARAM_NAME, "%d",
+			   clib_net_to_host_u16 (isport));
+  syslog_msg_add_sd_param (&syslog_msg, XATYP_SDPARAM_NAME, IATYP_IPV4);
+  syslog_msg_add_sd_param (&syslog_msg, XSADDR_SDPARAM_NAME, "%U",
+			   format_ip4_address, xsaddr);
+  syslog_msg_add_sd_param (&syslog_msg, XSPORT_SDPARAM_NAME, "%d",
+			   clib_net_to_host_u16 (xsport));
+  syslog_msg_add_sd_param (&syslog_msg, PROTO_SDPARAM_NAME, "%d",
+			   snat_proto_to_ip_proto (proto));
+
+  syslog_msg_send (&syslog_msg);
+}
+
+void
+nat_syslog_nat44_apmadd (u32 ssubix, u32 sfibix, ip4_address_t * isaddr,
+			 u16 isport, ip4_address_t * xsaddr, u16 xsport,
+			 snat_protocol_t proto)
+{
+  nat_syslog_nat44_apmap (ssubix, sfibix, isaddr, isport, xsaddr, xsport,
+			  proto, 1, 0);
+}
+
+void
+nat_syslog_nat44_apmdel (u32 ssubix, u32 sfibix, ip4_address_t * isaddr,
+			 u16 isport, ip4_address_t * xsaddr, u16 xsport,
+			 snat_protocol_t proto)
+{
+  nat_syslog_nat44_apmap (ssubix, sfibix, isaddr, isport, xsaddr, xsport,
+			  proto, 0, 0);
+}
+
+void
+nat_syslog_dslite_apmadd (u32 ssubix, ip6_address_t * sv6enc,
+			  ip4_address_t * isaddr, u16 isport,
+			  ip4_address_t * xsaddr, u16 xsport,
+			  snat_protocol_t proto)
+{
+  nat_syslog_nat44_apmap (ssubix, 0, isaddr, isport, xsaddr, xsport,
+			  proto, 1, sv6enc);
+}
+
+void
+nat_syslog_dslite_apmdel (u32 ssubix, ip6_address_t * sv6enc,
+			  ip4_address_t * isaddr, u16 isport,
+			  ip4_address_t * xsaddr, u16 xsport,
+			  snat_protocol_t proto)
+{
+  nat_syslog_nat44_apmap (ssubix, 0, isaddr, isport, xsaddr, xsport,
+			  proto, 0, sv6enc);
+}
+
+static inline void
+nat_syslog_nat44_sess (u32 ssubix, u32 sfibix, ip4_address_t * isaddr,
+		       u16 isport, ip4_address_t * xsaddr, u16 xsport,
+		       ip4_address_t * idaddr, u16 idport,
+		       ip4_address_t * xdaddr, u16 xdport,
+		       snat_protocol_t proto, u8 is_add, u8 is_twicenat)
+{
+  syslog_msg_t syslog_msg;
+  fib_table_t *fib;
+
+  if (!syslog_is_enabled ())
+    return;
+
+  if (syslog_severity_filter_block (SADD_SDEL_SEVERITY))
+    return;
+
+  fib = fib_table_get (sfibix, FIB_PROTOCOL_IP4);
+
+  syslog_msg_init (&syslog_msg, NAT_FACILITY, SADD_SDEL_SEVERITY, NAT_APPNAME,
+		   is_add ? SADD_MSGID : SDEL_MSGID);
+
+  syslog_msg_sd_init (&syslog_msg, NSESS_SDID);
+  syslog_msg_add_sd_param (&syslog_msg, SSUBIX_SDPARAM_NAME, "%d", ssubix);
+  syslog_msg_add_sd_param (&syslog_msg, SVLAN_SDPARAM_NAME, "%d",
+			   fib->ft_table_id);
+  syslog_msg_add_sd_param (&syslog_msg, IATYP_SDPARAM_NAME, IATYP_IPV4);
+  syslog_msg_add_sd_param (&syslog_msg, ISADDR_SDPARAM_NAME, "%U",
+			   format_ip4_address, isaddr);
+  syslog_msg_add_sd_param (&syslog_msg, ISPORT_SDPARAM_NAME, "%d",
+			   clib_net_to_host_u16 (isport));
+  syslog_msg_add_sd_param (&syslog_msg, XATYP_SDPARAM_NAME, IATYP_IPV4);
+  syslog_msg_add_sd_param (&syslog_msg, XSADDR_SDPARAM_NAME, "%U",
+			   format_ip4_address, xsaddr);
+  syslog_msg_add_sd_param (&syslog_msg, XSPORT_SDPARAM_NAME, "%d",
+			   clib_net_to_host_u16 (xsport));
+  syslog_msg_add_sd_param (&syslog_msg, PROTO_SDPARAM_NAME, "%d",
+			   snat_proto_to_ip_proto (proto));
+  syslog_msg_add_sd_param (&syslog_msg, XDADDR_SDPARAM_NAME, "%U",
+			   format_ip4_address, xdaddr);
+  syslog_msg_add_sd_param (&syslog_msg, XDPORT_SDPARAM_NAME, "%d",
+			   clib_net_to_host_u16 (xdport));
+  if (is_twicenat)
+    {
+      syslog_msg_add_sd_param (&syslog_msg, IDADDR_SDPARAM_NAME, "%U",
+			       format_ip4_address, idaddr);
+      syslog_msg_add_sd_param (&syslog_msg, IDPORT_SDPARAM_NAME, "%d",
+			       clib_net_to_host_u16 (idport));
+    }
+
+  syslog_msg_send (&syslog_msg);
+}
+
+void
+nat_syslog_nat44_sadd (u32 ssubix, u32 sfibix, ip4_address_t * isaddr,
+		       u16 isport, ip4_address_t * idaddr, u16 idport,
+		       ip4_address_t * xsaddr, u16 xsport,
+		       ip4_address_t * xdaddr, u16 xdport,
+		       snat_protocol_t proto, u8 is_twicenat)
+{
+  nat_syslog_nat44_sess (ssubix, sfibix, isaddr, isport, xsaddr, xsport,
+			 idaddr, idport, xdaddr, xdport, proto, 1,
+			 is_twicenat);
+}
+
+void
+nat_syslog_nat44_sdel (u32 ssubix, u32 sfibix, ip4_address_t * isaddr,
+		       u16 isport, ip4_address_t * idaddr, u16 idport,
+		       ip4_address_t * xsaddr, u16 xsport,
+		       ip4_address_t * xdaddr, u16 xdport,
+		       snat_protocol_t proto, u8 is_twicenat)
+{
+  nat_syslog_nat44_sess (ssubix, sfibix, isaddr, isport, xsaddr, xsport,
+			 idaddr, idport, xdaddr, xdport, proto, 0,
+			 is_twicenat);
+}
+
+static inline void
+nat_syslog_nat64_sess (u32 sfibix, ip6_address_t * isaddr, u16 isport,
+		       ip4_address_t * xsaddr, u16 xsport,
+		       ip4_address_t * xdaddr, u16 xdport,
+		       snat_protocol_t proto, u8 is_add)
+{
+  syslog_msg_t syslog_msg;
+  fib_table_t *fib;
+
+  if (!syslog_is_enabled ())
+    return;
+
+  if (syslog_severity_filter_block (SADD_SDEL_SEVERITY))
+    return;
+
+  fib = fib_table_get (sfibix, FIB_PROTOCOL_IP6);
+
+  syslog_msg_init (&syslog_msg, NAT_FACILITY, SADD_SDEL_SEVERITY, NAT_APPNAME,
+		   is_add ? SADD_MSGID : SDEL_MSGID);
+
+  syslog_msg_sd_init (&syslog_msg, NSESS_SDID);
+  syslog_msg_add_sd_param (&syslog_msg, SVLAN_SDPARAM_NAME, "%d",
+			   fib->ft_table_id);
+  syslog_msg_add_sd_param (&syslog_msg, IATYP_SDPARAM_NAME, IATYP_IPV6);
+  syslog_msg_add_sd_param (&syslog_msg, ISADDR_SDPARAM_NAME, "%U",
+			   format_ip6_address, isaddr);
+  syslog_msg_add_sd_param (&syslog_msg, ISPORT_SDPARAM_NAME, "%d",
+			   clib_net_to_host_u16 (isport));
+  syslog_msg_add_sd_param (&syslog_msg, XATYP_SDPARAM_NAME, IATYP_IPV4);
+  syslog_msg_add_sd_param (&syslog_msg, XSADDR_SDPARAM_NAME, "%U",
+			   format_ip4_address, xsaddr);
+  syslog_msg_add_sd_param (&syslog_msg, XSPORT_SDPARAM_NAME, "%d",
+			   clib_net_to_host_u16 (xsport));
+  syslog_msg_add_sd_param (&syslog_msg, PROTO_SDPARAM_NAME, "%d", proto);
+  syslog_msg_add_sd_param (&syslog_msg, XDADDR_SDPARAM_NAME, "%U",
+			   format_ip4_address, xdaddr);
+  syslog_msg_add_sd_param (&syslog_msg, XDPORT_SDPARAM_NAME, "%d",
+			   clib_net_to_host_u16 (xdport));
+
+  syslog_msg_send (&syslog_msg);
+}
+
+void
+nat_syslog_nat64_sadd (u32 sfibix, ip6_address_t * isaddr, u16 isport,
+		       ip4_address_t * xsaddr, u16 xsport,
+		       ip4_address_t * xdaddr, u16 xdport,
+		       snat_protocol_t proto)
+{
+  nat_syslog_nat64_sess (sfibix, isaddr, isport, xsaddr, xsport, xdaddr,
+			 xdport, proto, 1);
+}
+
+void
+nat_syslog_nat64_sdel (u32 sfibix, ip6_address_t * isaddr, u16 isport,
+		       ip4_address_t * xsaddr, u16 xsport,
+		       ip4_address_t * xdaddr, u16 xdport,
+		       snat_protocol_t proto)
+{
+  nat_syslog_nat64_sess (sfibix, isaddr, isport, xsaddr, xsport, xdaddr,
+			 xdport, proto, 0);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */