diff options
| author |   Ido Barnea <ibarnea@cisco.com> | 2016-12-21 15:36:35 +0200 |
|---|---|---|
| committer | Ido Barnea <ibarnea@cisco.com> | 2016-12-22 10:18:40 +0200 |
| commit | e528048b2a9c99899cf1f69a2c11f51a383384db (patch) | |
| tree | ac62991d084126877afe505de4dfbd58ddedefe1 /src/nat_check.h | |
| parent | 1eea3fc8a3721b10e062401f7e47ccf18e59fbe5 (diff) | |
Support for UDP with --learn_mode 1 and 3 (TCP ACK) using IP_ID
Signed-off-by: Ido Barnea <ibarnea@cisco.com>
Diffstat (limited to 'src/nat_check.h')
| -rwxr-xr-x | src/nat_check.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/nat_check.h b/src/nat_check.h index 538cf888..2af0a936 100755 --- a/src/nat_check.h +++ b/src/nat_check.h @@ -33,7 +33,8 @@ limitations under the License. // 2msec timeout #define MAX_TIME_MSG_IN_QUEUE_SEC ( 0.002 ) -#define NAT_FLOW_ID_MASK 0x00ffffff +#define NAT_FLOW_ID_MASK_TCP_ACK 0x00ffffff +#define NAT_FLOW_ID_MASK_IP_ID 0x000001ff class CNatOption { public: @@ -78,8 +79,9 @@ public: return (u.m_data[2]); } + // Used when doing NAT using IP option void set_fid(uint32_t fid) { - u.m_data_uint32[1] = fid & NAT_FLOW_ID_MASK; + u.m_data_uint32[1] = fid & NAT_FLOW_ID_MASK_TCP_ACK; } uint32_t get_fid() { @@ -225,9 +227,14 @@ public: void Dump(FILE *fd); void DumpShort(FILE *fd); static inline uint32_t calc_tcp_ack_val(uint32_t fid, uint8_t thread_id) { - return ((fid & NAT_FLOW_ID_MASK) << 8) | thread_id; + return ((fid & NAT_FLOW_ID_MASK_TCP_ACK) << 8) | thread_id; + } + static inline uint16_t calc_ip_id_val(uint32_t fid, uint8_t thread_id) { + // MSB bit == 1 signals this is latency packet + return ((fid & NAT_FLOW_ID_MASK_IP_ID) << 6) | (thread_id & 0x3f) | 0x8000; } void get_info_from_tcp_ack(uint32_t tcp_ack, uint32_t &fid, uint8_t &thread_id); + void get_info_from_ip_id(uint16_t ip_id, uint32_t &fid, uint8_t &thread_id); private: CNatPerThreadInfo * get_thread_info(uint8_t thread_id); void flush_node(CNatPerThreadInfo * thread_info); |