249 lines
9.3 KiB
C
249 lines
9.3 KiB
C
/*
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**********************************************************************************************
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* Maat: Deep Packet Inspection Policy Framework
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* Maat is the Goddess of truth and justice in ancient Egyptian concept.
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* Her feather was the measure that determined whether the souls (considered
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* to reside in the heart) of the departed would reach the paradise of afterlife
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* successfully.
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* Authors: Liu WenTan <liuwentan@geedgenetworks.com>
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* Date: 2022-10-31
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* Copyright: (c) 2018-2023 Geedge Networks, Inc. All rights reserved.
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***********************************************************************************************
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*/
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#ifndef _MAAT_H_
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#define _MAAT_H_
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <stdint.h>
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#include <netinet/in.h>
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/* maat instance handle */
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struct maat;
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struct maat_hit_path {
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int Nth_scan;
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int vtable_id; // 0 is not a virtual table.
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long long item_id;
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long long sub_group_id;
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long long top_group_id;
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long long compile_id;
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};
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struct maat_hit_object {
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int vtable_id;
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long long group_id;
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};
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enum maat_scan_status {
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MAAT_SCAN_ERR = -1, //scan error
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MAAT_SCAN_OK, //scan but not hit(group or compile)
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MAAT_SCAN_HALF_HIT, //half hit: hit group, not hit compile
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MAAT_SCAN_HIT //scan hit compile
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};
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enum maat_update_type {
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MAAT_UPDATE_TYPE_INVALID = 0,
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MAAT_UPDATE_TYPE_FULL,
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MAAT_UPDATE_TYPE_INC
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};
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struct ip_addr {
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int ip_type; //4: IPv4, 6: IPv6
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union {
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unsigned int ipv4; //network order
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unsigned int ipv6[4];
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};
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};
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enum log_level {
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LOG_LEVEL_TRACE,
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LOG_LEVEL_DEBUG,
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LOG_LEVEL_INFO,
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LOG_LEVEL_WARN,
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LOG_LEVEL_ERROR,
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LOG_LEVEL_FATAL
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};
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/* update_type: MAAT_UPDATE_TYPE_FULL or MAAT_UPDATE_TYPE_INC */
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typedef void maat_start_callback_t(int update_type, void *u_param);
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typedef void maat_update_callback_t(int table_id, const char *table_line, void *u_para);
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typedef void maat_finish_callback_t(void *u_para);
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typedef void maat_ex_new_func_t(const char *table_name, int table_id, const char *key,
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const char *table_line, void **ad, long argl, void *argp);
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typedef void maat_ex_free_func_t(int table_id, void **ad, long argl, void *argp);
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typedef void maat_ex_dup_func_t(int table_id, void **to, void **from, long argl, void *argp);
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/* maat_instance options API */
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struct maat_options;
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struct maat_options *maat_options_new(void);
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void maat_options_free(struct maat_options *opts);
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int maat_options_set_caller_thread_number(struct maat_options *opts, size_t n_thread);
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int maat_options_set_accept_tags(struct maat_options *opts, const char *accept_tags);
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int maat_options_set_rule_effect_interval_ms(struct maat_options *opts, int interval_ms);
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int maat_options_set_rule_update_checking_interval_ms(struct maat_options *opts, int interval_ms);
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int maat_options_set_gc_timeout_ms(struct maat_options *opts, int interval_ms);
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int maat_options_set_instance_name(struct maat_options *opts, const char *instance_name);
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int maat_options_set_deferred_load_on(struct maat_options *opts);
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int maat_options_set_stat_on(struct maat_options *opts);
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int maat_options_set_perf_on(struct maat_options *opts);
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int maat_options_set_foreign_cont_dir(struct maat_options *opts, const char *dir);
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int maat_options_set_logger(struct maat_options *opts, const char *log_path, enum log_level level);
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int maat_options_set_iris(struct maat_options *opts, const char *full_directory,
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const char *increment_directory);
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int maat_options_set_json_file(struct maat_options *opts, const char *json_filename);
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/**
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* Indicate whether the JSON file is compressed by gzip
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* flag: 1(compressed) 0(uncompressed)
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* */
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int maat_options_set_json_file_gzip_flag(struct maat_options *opts, int flag);
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/* Specify the decryption key for the JSON file to be decrypted */
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int maat_options_set_json_file_decrypt_key(struct maat_options *opts, const char *decrypt_key);
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int maat_options_set_redis(struct maat_options *opts, const char *redis_ip,
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uint16_t redis_port, int redis_db);
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int maat_options_set_stat_file(struct maat_options *opts, const char *stat_filename);
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/* maat_instance API */
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struct maat *maat_new(struct maat_options *opts, const char *table_info_path);
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void maat_free(struct maat *instance);
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/* maat helper API */
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int maat_helper_read_column(const char *table_line, int Nth_column,
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size_t *column_offset, size_t *column_len);
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/**
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* verify if regex expression is legal
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*
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* @param The NULL-terminated expression to parse.
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* @retval 1(legal) 0(illegal)
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**/
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int maat_helper_verify_regex_expression(const char *expression);
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/* maat table API */
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int maat_get_table_id(struct maat *instance, const char *table_name);
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/* return 0 if success, otherwise return -1 */
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int maat_table_callback_register(struct maat *instance, int table_id,
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maat_start_callback_t *start,
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maat_update_callback_t *update,
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maat_finish_callback_t *finish,
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void *u_para);
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/* maat plugin table API */
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int maat_plugin_table_ex_schema_register(struct maat *instance, const char *table_name,
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maat_ex_new_func_t *new_func,
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maat_ex_free_func_t *free_func,
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maat_ex_dup_func_t *dup_func,
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long argl, void *argp);
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/**
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* returned data is duplicated by dup_func of maat_plugin_table_ex_schema_register,
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* caller is responsible to free the data.
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*/
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void *maat_plugin_table_get_ex_data(struct maat *instance, int table_id, const char *key);
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int maat_ip_plugin_table_get_ex_data(struct maat *instance, int table_id,
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const struct ip_addr *ip, void **ex_data_array,
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size_t n_ex_data);
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int maat_fqdn_plugin_table_get_ex_data(struct maat *instance, int table_id,
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const char *fqdn, void **ex_data_array,
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size_t n_ex_data);
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int maat_bool_plugin_table_get_ex_data(struct maat *instance, int table_id,
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unsigned long long *item_ids, size_t n_item,
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void **ex_data_array, size_t n_ex_data);
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/* maat scan API */
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struct maat_state;
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/**
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* @param instance: maat instance created by maat_new()
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* @param table_id: the id of table which to be scanned
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* @param thread_id: thread index
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* @param results: array to store hit compile id
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* @param n_result: the array size
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* @param n_hit_result: the number of hit compile id
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* @param state: scan mid status
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*
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* @retval MAAT_SCAN_ERR
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* MAAT_SCAN_OK
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* MAAT_SCAN_HALF_HIT
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* MAAT_SCAN_HIT
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*/
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int maat_scan_flag(struct maat *instance, int table_id,
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long long flag, long long *results, size_t n_result,
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size_t *n_hit_result, struct maat_state *state);
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int maat_scan_integer(struct maat *instance, int table_id,
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long long integer, long long *results, size_t n_result,
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size_t *n_hit_result, struct maat_state *state);
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/**
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* @param ip_addr: network ipv4 address
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* @param port: network port
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* @param protocol: -1(ANY protocol) 1(ICMP) 6(TCP) 17(UDP)
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*/
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int maat_scan_ipv4(struct maat *instance, int table_id,
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uint32_t ip_addr, uint16_t port, int protocol,
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long long *results, size_t n_result,
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size_t *n_hit_result, struct maat_state *state);
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int maat_scan_ipv6(struct maat *instance, int table_id,
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uint8_t *ip_addr, uint16_t port, int protocol,
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long long *results, size_t n_result,
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size_t *n_hit_result, struct maat_state *state);
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int maat_scan_string(struct maat *instance, int table_id,
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const char *data, size_t data_len, long long *results,
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size_t n_result, size_t *n_hit_result,
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struct maat_state *state);
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struct maat_stream;
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struct maat_stream *maat_stream_new(struct maat *instance, int table_id,
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struct maat_state *state);
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int maat_stream_scan(struct maat_stream *stream, const char *data, int data_len,
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long long *results, size_t n_result, size_t *n_hit_result,
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struct maat_state *state);
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void maat_stream_free(struct maat_stream *stream);
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/* maat state API */
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struct maat_state *maat_state_new(struct maat *instance, int thread_id);
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void maat_state_reset(struct maat_state *state);
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void maat_state_free(struct maat_state *state);
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int maat_state_set_scan_district(struct maat_state *state, int table_id,
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const char *district, size_t district_len);
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int maat_state_set_last_scan(struct maat_state *state);
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int maat_state_set_scan_compile_table(struct maat_state *state, int compile_table_id);
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int maat_state_get_hit_paths(struct maat_state *state, struct maat_hit_path *paths,
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size_t n_path);
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int maat_state_get_hit_objects(struct maat_state *state, struct maat_hit_object *objs,
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size_t n_obj);
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/* return hit object compile_id */
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int maat_hit_object_compile_id(struct maat *instance, struct maat_hit_object *obj);
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#ifdef __cplusplus
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}
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#endif
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#endif
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