#include <vlibapi/api.h>
+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) \
#undef _
} nat_error_t;
-#define foreach_nat_protocol \
- _ (OTHER, 0, other, "other") \
- _ (UDP, 1, udp, "udp") \
- _ (TCP, 2, tcp, "tcp") \
- _ (ICMP, 3, icmp, "icmp")
-
-typedef enum
-{
-#define _(N, i, n, s) NAT_PROTOCOL_##N = i,
- foreach_nat_protocol
-#undef _
-} nat_protocol_t;
-
-/* default session timeouts */
+/* 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
-// TODO: move common formating definitions here
+typedef struct
+{
+ 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__ */
/*