NAT: syslog - sessions logging (VPP-1139)

[vpp.git] / src / plugins / nat / out2in_ed.c

diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c
index 55b34f5..f76fc60 100644 (file)
--- a/src/plugins/nat/out2in_ed.c
+++ b/src/plugins/nat/out2in_ed.c
@@ -29,6 +29,7 @@
 #include <nat/nat_ipfix_logging.h>
 #include <nat/nat_reass.h>
 #include <nat/nat_inlines.h>
+#include <nat/nat_syslog.h>
 
 #define foreach_nat_out2in_ed_error                     \
 _(UNSUPPORTED_PROTOCOL, "Unsupported protocol")         \
@@ -39,7 +40,8 @@ _(NO_TRANSLATION, "No translation")                     \
 _(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded")   \
 _(DROP_FRAGMENT, "Drop fragment")                       \
 _(MAX_REASS, "Maximum reassemblies exceeded")           \
-_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")\
+_(NON_SYN, "non-SYN packet try to create session")
 
 typedef enum
 {
@@ -172,6 +174,13 @@ nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
                                           s->out2in.port,
                                           s->in2out.fib_index);
 
+      nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
+                            &s->in2out.addr, s->in2out.port,
+                            &s->ext_host_nat_addr, s->ext_host_nat_port,
+                            &s->out2in.addr, s->out2in.port,
+                            &s->ext_host_addr, s->ext_host_port,
+                            s->in2out.protocol, is_twice_nat_session (s));
+
       if (is_twice_nat_session (s))
        {
          for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
@@ -302,6 +311,19 @@ create_session_for_static_mapping_ed (snat_main_t * sm,
                                               &ctx))
     nat_log_notice ("in2out-ed key add failed");
 
+  snat_ipfix_logging_nat44_ses_create (s->in2out.addr.as_u32,
+                                      s->out2in.addr.as_u32,
+                                      s->in2out.protocol,
+                                      s->in2out.port,
+                                      s->out2in.port, s->in2out.fib_index);
+
+  nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
+                        &s->in2out.addr, s->in2out.port,
+                        &s->ext_host_nat_addr, s->ext_host_nat_port,
+                        &s->out2in.addr, s->out2in.port,
+                        &s->ext_host_addr, s->ext_host_port,
+                        s->in2out.protocol, is_twice_nat_session (s));
+
   return s;
 }
 
@@ -875,6 +897,13 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm,
                  if (PREDICT_FALSE (identity_nat0))
                    goto trace00;
 
+                 if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+                   {
+                     b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+                     next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+                     goto trace00;
+                   }
+
                  /* Create session initiated by host from external network */
                  s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
                                                             e_key0, node,
@@ -1097,6 +1126,13 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm,
                  if (PREDICT_FALSE (identity_nat1))
                    goto trace01;
 
+                 if ((proto1 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp1))
+                   {
+                     b1->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+                     next1 = NAT44_ED_OUT2IN_NEXT_DROP;
+                     goto trace01;
+                   }
+
                  /* Create session initiated by host from external network */
                  s1 = create_session_for_static_mapping_ed (sm, b1, l_key1,
                                                             e_key1, node,
@@ -1353,6 +1389,13 @@ nat44_ed_out2in_node_fn_inline (vlib_main_t * vm,
                  if (PREDICT_FALSE (identity_nat0))
                    goto trace0;
 
+                 if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+                   {
+                     b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+                     next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+                     goto trace0;
+                   }
+
                  /* Create session initiated by host from external network */
                  s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
                                                             e_key0, node,
@@ -1702,6 +1745,13 @@ nat44_ed_out2in_reass_node_fn (vlib_main_t * vm,
                      goto trace0;
                    }
 
+                 if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+                   {
+                     b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+                     next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+                     goto trace0;
+                   }
+
                  /* Create session initiated by host from external network */
                  s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
                                                             e_key0, node,