nat: nat44-ed cleanup & fixes

[vpp.git] / src / plugins / nat / lib / lib.h

diff --git a/src/plugins/nat/lib/lib.h b/src/plugins/nat/lib/lib.h
index 005db81..dc2c43b 100644 (file)
--- a/src/plugins/nat/lib/lib.h
+++ b/src/plugins/nat/lib/lib.h
@@ -19,16 +19,44 @@
 #ifndef included_nat_lib_h__
 #define included_nat_lib_h__
 
-#define foreach_nat_error \
-  _(VALUE_EXIST, -1, "Value already exists") \
-  _(NO_SUCH_ENTRY, -2, "No such entry") \
-  _(UNKNOWN_PROTOCOL, -3, "Unknown protocol") \
-  _(OUT_OF_TRANSLATIONS, -4, "Out of translations")
+#include <vlibapi/api.h>
 
-#define foreach_nat_protocol \
-  _(UDP, 0, udp, "udp")       \
-  _(TCP, 1, tcp, "tcp")       \
-  _(ICMP, 2, icmp, "icmp")
+typedef struct
+{
+  u16 identifier;
+  u16 sequence;
+} nat_icmp_echo_header_t;
+
+typedef struct
+{
+  u16 src_port, dst_port;
+} nat_tcp_udp_header_t;
+
+/* NAT API Configuration flags */
+#define foreach_nat_config_flag \
+  _(0x01, IS_TWICE_NAT)         \
+  _(0x02, IS_SELF_TWICE_NAT)    \
+  _(0x04, IS_OUT2IN_ONLY)       \
+  _(0x08, IS_ADDR_ONLY)         \
+  _(0x10, IS_OUTSIDE)           \
+  _(0x20, IS_INSIDE)            \
+  _(0x40, IS_STATIC)            \
+  _(0x80, IS_EXT_HOST_VALID)
+
+typedef enum nat_config_flags_t_
+{
+#define _(n,f) NAT_API_##f = n,
+  foreach_nat_config_flag
+#undef _
+} nat_config_flags_t;
+
+#define foreach_nat_counter _ (tcp) _ (udp) _ (icmp) _ (other) _ (drops)
+
+#define foreach_nat_error                      \
+  _ (VALUE_EXIST, -1, "Value already exists")  \
+  _ (NO_SUCH_ENTRY, -2, "No such entry")       \
+  _ (UNKNOWN_PROTOCOL, -3, "Unknown protocol") \
+  _ (OUT_OF_TRANSLATIONS, -4, "Out of translations")
 
 typedef enum
 {
@@ -37,12 +65,53 @@ typedef enum
 #undef _
 } nat_error_t;
 
-typedef enum
+/* default protocol timeouts */
+#define NAT_UDP_TIMEOUT 300
+#define NAT_TCP_TRANSITORY_TIMEOUT 240
+#define NAT_TCP_ESTABLISHED_TIMEOUT 7440
+#define NAT_ICMP_TIMEOUT 60
+
+typedef struct
 {
-#define _(N, i, n, s) NAT_PROTOCOL_##N = i,
-  foreach_nat_protocol
-#undef _
-} nat_protocol_t;
+  struct
+  {
+    u32 established;
+    u32 transitory;
+  } tcp;
+
+  u32 udp;
+  u32 icmp;
+
+} nat_timeouts_t;
+
+static_always_inline void
+nat_reset_timeouts (nat_timeouts_t * timeouts)
+{
+  timeouts->udp = NAT_UDP_TIMEOUT;
+  timeouts->tcp.established = NAT_TCP_ESTABLISHED_TIMEOUT;
+  timeouts->tcp.transitory = NAT_TCP_TRANSITORY_TIMEOUT;
+  timeouts->icmp = NAT_ICMP_TIMEOUT;
+}
+
+static_always_inline u32
+nat_calc_bihash_buckets (u32 n_elts)
+{
+  n_elts = n_elts / 2.5;
+  u64 lower_pow2 = 1;
+  while (lower_pow2 * 2 < n_elts)
+    {
+      lower_pow2 = 2 * lower_pow2;
+    }
+  u64 upper_pow2 = 2 * lower_pow2;
+  if ((upper_pow2 - n_elts) < (n_elts - lower_pow2))
+    {
+      if (upper_pow2 <= UINT32_MAX)
+       {
+         return upper_pow2;
+       }
+    }
+  return lower_pow2;
+}
 
 #endif /* included_nat_lib_h__ */
 /*