_(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
{
make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, tx_fib_index,
src_port, dst_port);
if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
- return 1;
+ {
+ s = pool_elt_at_index (tsm->sessions, value.value);
+ if (nat44_is_ses_closed (s))
+ {
+ nat_log_debug ("TCP close connection %U", format_snat_session,
+ &sm->per_thread_data[thread_index], s);
+ nat_free_session_data (sm, s, thread_index);
+ nat44_delete_session (sm, s, thread_index);
+ }
+ else
+ s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE;
+ return 1;
+ }
/* dst NAT check */
make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto, rx_fib_index,
goto trace00;
}
+ if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ {
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
+ next0 = NAT_IN2OUT_ED_NEXT_DROP;
+ goto trace00;
+ }
+
next0 =
slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
next0, thread_index, now);
goto trace01;
}
+ if ((proto1 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp1))
+ {
+ b1->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
+ next1 = NAT_IN2OUT_ED_NEXT_DROP;
+ goto trace01;
+ }
+
next1 =
slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node,
next1, thread_index, now);
goto trace0;
}
+ if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ {
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
+ next0 = NAT_IN2OUT_ED_NEXT_DROP;
+ goto trace0;
+ }
+
next0 =
slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
next0, thread_index, now);
}
}
+ if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ {
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
+ next0 = NAT_IN2OUT_ED_NEXT_DROP;
+ goto trace0;
+ }
+
next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0,
&s0, node, next0, thread_index, now);
}
/* Hairpinning */
- if (PREDICT_TRUE (proto0 != SNAT_PROTOCOL_ICMP))
- nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
- s0->ext_host_port, proto0, 1);
- else
- snat_icmp_hairpinning (sm, b0, ip0, icmp0, 1);
+ nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
+ s0->ext_host_port, proto0, 1);
/* Accounting */
nat44_session_update_counters (s0, now,
u32 len = vec_len (fragments_to_loopback);
if (len <= VLIB_FRAME_SIZE)
{
- clib_memcpy (from, fragments_to_loopback,
- sizeof (u32) * len);
+ clib_memcpy_fast (from, fragments_to_loopback,
+ sizeof (u32) * len);
n_left_from = len;
vec_reset_length (fragments_to_loopback);
}
else
{
- clib_memcpy (from,
- fragments_to_loopback + (len -
- VLIB_FRAME_SIZE),
- sizeof (u32) * VLIB_FRAME_SIZE);
+ clib_memcpy_fast (from, fragments_to_loopback +
+ (len - VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
n_left_from = VLIB_FRAME_SIZE;
_vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
}