tango-kni/entry/src/kni_maat.cpp

#include "kni_utils.h"
#include "kni_maat.h"

extern int g_iThreadNum;


/* 关于没有命中配置情况下的默认配置
	1. g_maat_default_action = KNI_ACTION_INTERCEPT， policy_id = 0
	2. 如果maat的编译配置表中有policy_id = 0的配置，则将 g_maat_default_action设为对应的action, policy_id = 0
*/

int g_maat_default_action = KNI_ACTION_INTERCEPT;

struct kni_maat_handle{
	Maat_feather_t feather;
	int tableid_intercept_ip;
	int tableid_intercept_domain;
	void *logger;
};

void kni_maat_destroy(struct kni_maat_handle *handle){
	if(handle != NULL){
		if(handle->feather != NULL){
			Maat_burn_feather(handle->feather);
		}
	}
	FREE(&handle);
}


void compile_ex_param_new(int idx, const struct Maat_rule_t* rule, const char* srv_def_large, MAAT_RULE_EX_DATA* ad, long argl, void *argp){
	void *logger = argp;
	KNI_LOG_DEBUG(logger, "call compile_ex_param_new");
	if(rule->config_id == 0){
		g_maat_default_action = rule->action;
	}
	return;
}

void compile_ex_param_free(int idx, const struct Maat_rule_t* rule, const char* srv_def_large, MAAT_RULE_EX_DATA* ad, long argl, void *argp){
	void *logger = argp;
	KNI_LOG_DEBUG(logger, "call compile_ex_param_free");
	return;
}

void compile_ex_param_dup(int idx,	MAAT_RULE_EX_DATA *to, MAAT_RULE_EX_DATA *from, long argl, void *argp){
	void *logger = argp;
	KNI_LOG_DEBUG(logger, "call compile_ex_param_dup");
	return;
}

struct kni_maat_handle* kni_maat_init(const char* profile, void *logger){
	const char *section = "maat";
	int readconf_mode;
	char tableinfo_path[KNI_PATH_MAX];
	char tablename_intercept_ip[KNI_SYMBOL_MAX];
	char tablename_intercept_domain[KNI_SYMBOL_MAX];
	char compile_alias[KNI_SYMBOL_MAX];
	char maatjson_path[KNI_PATH_MAX];
	char redis_ip[INET_ADDRSTRLEN];
	int redis_port;
	int redis_index;
	Maat_feather_t feather = NULL;
	int tableid_intercept_ip = -1;
	int tableid_intercept_domain = -1;
	struct kni_maat_handle *handle = NULL;
	int ret = MESA_load_profile_int_nodef(profile, section, "readconf_mode", &readconf_mode);
	if(ret < 0){
		KNI_LOG_ERROR(logger, "MESA_prof_load: readconf_mode not set, profile is %s, section is %s", profile, section);
		goto error_out;
	}
	ret = MESA_load_profile_string_nodef(profile, section, "tableinfo_path", tableinfo_path, sizeof(tableinfo_path));
	if(ret < 0){
		KNI_LOG_ERROR(logger, "MESA_prof_load: tableinfo_path not set, profile is %s, section is %s", profile, section);
		goto error_out;
	}
	ret = MESA_load_profile_string_nodef(profile, section, "tablename_intercept_ip", tablename_intercept_ip, sizeof(tablename_intercept_ip));
	if(ret < 0){
		KNI_LOG_ERROR(logger, "MESA_prof_load: tablename_intercept_ip not set, profile is %s, section is %s", profile, section);
		goto error_out;
	}
	ret = MESA_load_profile_string_nodef(profile, section, "tablename_intercept_domain", tablename_intercept_domain, sizeof(tablename_intercept_domain));
	if(ret < 0){
		KNI_LOG_ERROR(logger, "MESA_prof_load: tablename_intercept_domain not set, profile is %s, section is %s", profile, section);
		goto error_out;
	}
	ret = MESA_load_profile_string_nodef(profile, section, "compile_alias", compile_alias, sizeof(compile_alias));
	if(ret < 0){
		KNI_LOG_ERROR(logger, "MESA_prof_load: compile_alias not set, profile is %s, section is %s", profile, section);
		goto error_out;
	}
	KNI_LOG_INFO(logger, "MESA_prof_load, [%s]:\n readconf_mode: %d\n tableinfo_path: %s\n tablename_intercept_ip: %s\n tablename_intercept_domain: %s\n"
				"compile_alias: %s\n", section, readconf_mode, tableinfo_path, tablename_intercept_ip, tablename_intercept_domain, compile_alias);
	feather = Maat_feather(g_iThreadNum, tableinfo_path, logger);
	handle = ALLOC(struct kni_maat_handle, 1);
	handle->feather = feather;
	if(feather == NULL){
		KNI_LOG_ERROR(logger, "Failed at Maat_feather, max_thread_num is %d, tableinfo_path is %s", g_iThreadNum, tableinfo_path);
		return NULL;
	}
	switch(readconf_mode){
		case KNI_MAAT_READCONF_JSON:
			ret = MESA_load_profile_string_nodef(profile, section, "maatjson_path", maatjson_path, sizeof(maatjson_path));
			if(ret < 0){
				KNI_LOG_ERROR(logger, "MESA_prof_load: maatjson_path not set, profile is %s, section is %s", profile, section);
				goto error_out;
			}
			KNI_LOG_INFO(logger, "MESA_prof_load, [%s]:\n maatjson_path: %s", section, maatjson_path);
			Maat_set_feather_opt(feather, MAAT_OPT_JSON_FILE_PATH, maatjson_path, strlen(maatjson_path));
			break;
		case KNI_MAAT_READCONF_IRIS:
			break;
		case KNI_MAAT_READCONF_REDIS:
			ret = MESA_load_profile_string_nodef(profile, section, "redis_ip", redis_ip, sizeof(redis_ip));
			if(ret < 0){
				KNI_LOG_ERROR(logger, "MESA_prof_load: redis_ip not set, profile is %s, section is %s", profile, section);
				goto error_out;
			}
			ret = MESA_load_profile_int_nodef(profile, section, "redis_port", &redis_port);
			if(ret < 0){
				KNI_LOG_ERROR(logger, "MESA_prof_load: redis_port not set, profile is %s, section is %s", profile, section);
				goto error_out;
			}
			ret = MESA_load_profile_int_nodef(profile, section, "redis_index", &redis_index);
			if(ret < 0){
				KNI_LOG_ERROR(logger, "MESA_prof_load: redis_index not set, profile is %s, section is %s", profile, section);
				goto error_out;
			}
			KNI_LOG_INFO(logger, "MESA_prof_load, [%s]:\n redis_ip: %s\n redis_port: %d\n redis_index: %d", 
				section, redis_ip, redis_port, redis_index);
			Maat_set_feather_opt(feather, MAAT_OPT_REDIS_IP, (void*)redis_ip, strlen(redis_ip) + 1);
			Maat_set_feather_opt(feather, MAAT_OPT_REDIS_PORT, (void*)&redis_port, sizeof(redis_port));
			Maat_set_feather_opt(feather, MAAT_OPT_REDIS_INDEX, (void*)&redis_index, sizeof(redis_index));
			break;
		default:
			break;
	}
	ret = Maat_initiate_feather(feather);
	if(ret < 0){
		KNI_LOG_ERROR(logger, "Failed at Maat_initiate_feather");
		goto error_out;
	}
	tableid_intercept_ip = Maat_table_register(feather, tablename_intercept_ip);
	tableid_intercept_domain = Maat_table_register(feather, tablename_intercept_domain);
	if(tableid_intercept_ip < 0){
		KNI_LOG_ERROR(logger, "Failed at Maat_table_register, tablename is %d, ret is %d", 
					  tablename_intercept_ip, tableid_intercept_ip);
		goto error_out;
	}
	if(tableid_intercept_domain < 0){
		KNI_LOG_ERROR(logger, "Failed at Maat_table_register, tablename is %d, ret is %d", 
					  tablename_intercept_domain, tableid_intercept_domain);
		goto error_out;
	}
	ret = Maat_rule_get_ex_new_index(feather, compile_alias, compile_ex_param_new, compile_ex_param_free, compile_ex_param_dup, 0, logger);
	if(ret < 0){
		KNI_LOG_ERROR(logger, "Failed at Maat_rule_get_ex_new_index, ret is %d", ret);
		kni_maat_destroy(handle);
		goto error_out;
	}
	handle->tableid_intercept_ip = tableid_intercept_ip;
	handle->tableid_intercept_domain = tableid_intercept_domain;
	handle->logger = logger;
	return handle;

error_out:
	kni_maat_destroy(handle);
	return NULL;
}

static int maat_process_scan_result(struct kni_maat_handle *handle, int num, struct Maat_rule_t *result, int *policy_id){
	//void *logger = handle->logger;
	int action = g_maat_default_action;
	*policy_id = 0;  //默认动作是编译表中policy_id=0的字段，所以默认policy_id=0;
	for(int i = 0; i < num; i++){
		action = result[i].action;
		*policy_id = result[i].config_id;
		if(action == KNI_ACTION_BYPASS){
			return action;
		}
	}
	return action;
}


//TODO: Maat_rule_get_ex_new_index   compile_ex_param_new: config_id = 0, 取action即为全局变量, 一旦配置更新就回调, tableinfo怎么写，回调表， 编译配置表 
int kni_maat_scan_ip(struct kni_maat_handle *handle, struct ipaddr *addr, int thread_seq, int *policy_id){
	//printf("default action is %d\n", g_maat_default_action);
	void *logger = handle->logger;
	struct Maat_rule_t result[KNI_MAAT_RULE_NUM_MAX];
	scan_status_t mid = NULL;
	int ret = Maat_scan_proto_addr(handle->feather, handle->tableid_intercept_ip, addr, 0, result, 
								KNI_MAAT_RULE_NUM_MAX, &mid, thread_seq);
	if(ret < 0){
		KNI_LOG_ERROR(logger, "Failed at Maat_scan_proto_addr, ret is %d", ret);
		return g_maat_default_action;
	}
	int action = maat_process_scan_result(handle, ret, result, policy_id);
	
	/*for debug
	char stream_addr[KNI_SYMBOL_MAX] = "";
	kni_stream_addr_trans(addr, stream_addr, sizeof(stream_addr));
	KNI_LOG_DEBUG(logger, "maat_scan_ip, %s, policy_id = %d, action = %s\n", 
			stream_addr, *policy_id, action == KNI_ACTION_BYPASS ? "bypss" : "intercept");
	*/
	return action;
}

int kni_maat_scan_domain(struct kni_maat_handle* handle, char *domain, int domain_len, int thread_seq, int *policy_id){
	void *logger = handle->logger;
	struct Maat_rule_t result[KNI_MAAT_RULE_NUM_MAX];
	//必须要初始化为NULL, 不懂为什么
	scan_status_t mid = NULL;
	int ret = Maat_full_scan_string(handle->feather, handle->tableid_intercept_domain, CHARSET_UTF8,
			domain, domain_len, result, NULL, KNI_MAAT_RULE_NUM_MAX, &mid, thread_seq);
	if(ret < 0){
		KNI_LOG_ERROR(logger, "Failed at Maat_full_scan_string, ret is %d", ret);
		return g_maat_default_action;
	}
	int action = maat_process_scan_result(handle, ret, result, policy_id);

	//for debug
	char domain1[100] = "";
	memcpy(domain1, domain, domain_len);
	domain1[domain_len] = '\0';
	KNI_LOG_DEBUG(logger, "maat_scan_domain: %s, policy_id = %d, action = %s\n", 
			domain, *policy_id, action == KNI_ACTION_BYPASS ? "bypss" : "intercept");
	return action;
}