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session manager: support session timeouts & tcp dupkt filter & udp eviction filter

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luwenpeng
2024-01-17 11:47:55 +08:00
parent 1d4736ac88
commit 4fbafab4e3
20 changed files with 972 additions and 607 deletions
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61
src/session/session_manager.h
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@@ -8,32 +8,65 @@ extern "C"
#include "session.h"
// #define SESSION_LOG_ERROR(format, ...) void(0)
#ifndef SESSION_LOG_ERROR
#define SESSION_LOG_ERROR(format, ...) \
fprintf(stderr, "ERROR (session), " format "\n", ##__VA_ARGS__);
#endif
// #define SESSION_LOG_DEBUG(format, ...) void(0)
#ifndef SESSION_LOG_DEBUG
#define SESSION_LOG_DEBUG(format, ...) \
fprintf(stderr, "DEBUG (session), " format "\n", ##__VA_ARGS__);
#endif
struct session_manager_config
{
// max session number
uint64_t max_tcp_session_num;
uint64_t max_udp_session_num;
// TCP timeout
uint64_t tcp_timeout_init; // seconds, Range: 1-60
uint64_t tcp_timeout_handshake; // seconds, Range: 1-60
uint64_t tcp_timeout_data; // seconds, Range: 1-15,999,999
uint64_t tcp_timeout_half_closed; // seconds, Range: 1-604,800
uint64_t tcp_timeout_discard; // seconds, Range: 1-15,999,999
// UDP timeout
uint64_t udp_timeout_data; // seconds, Range: 1-15,999,999
// TCP duplicate packet filter
uint8_t tcp_dupkt_filter_enable;
uint64_t tcp_dupkt_filter_capacity;
uint64_t tcp_dupkt_filter_timeout; // seconds, Range: 1-60
double tcp_dupkt_filter_error_rate;
// UDP eviction filter
uint8_t udp_eviction_filter_enable;
uint64_t udp_eviction_filter_capacity;
uint64_t udp_eviction_filter_timeout; // seconds, Range: 1-60
double udp_eviction_filter_error_rate;
};
struct session_manager;
struct session_manager *session_manager_create(uint64_t max_session_num);
struct session_manager *session_manager_create(struct session_manager_config *config);
void session_manager_destroy(struct session_manager *mgr);
void session_manager_set_timeout_toclosing(struct session_manager *mgr, uint64_t timeout_ms);
void session_manager_set_timeout_toclosed(struct session_manager *mgr, uint64_t timeout_ms);
struct session *session_manager_lookup(struct session_manager *mgr, const struct packet *pkt);
// return null: invalid tuple6 or tcp first packet is not syn
struct session *session_manager_update(struct session_manager *mgr, const struct packet *pkt);
struct session *session_manager_expire(struct session_manager *mgr);
struct session *session_manager_evicte(struct session_manager *mgr);
// for debug
uint64_t session_manager_get_sessions(struct session_manager *mgr, enum session_type type, enum session_state state);
// only use the packet six-tuple to find the session, not update it
struct session *session_manager_lookup_sesssion(struct session_manager *mgr, const struct packet *pkt);
/*
* Return NULL in the following cases:
* 1.not a TCP or UDP packet
* 2.TCP packet miss session but no syn packet seen
* 3.TCP duplicate packet
* 4.TCP discards packets
* 5.UDP evict packet
* pakcet will not update the session and needs to be fast forwarded
*/
struct session *session_manager_update_session(struct session_manager *mgr, const struct packet *pkt);
struct session *session_manager_get_expired_session(struct session_manager *mgr);
struct session *session_manager_get_evicted_session(struct session_manager *mgr);
// return interval (seconds) to next required update, return 0 if no session
uint64_t session_manager_get_expire_interval(struct session_manager *mgr);
uint64_t session_manager_get_session_number(struct session_manager *mgr, enum session_type type, enum session_state state);
#ifdef __cpluscplus
}