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postgres_output.c
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/**
* \file postgres_output.c
* \author Michal Srb <[email protected]>
* \brief Plugin for storing IPFIX data in PostgreSQL database.
*
* Copyright (C) 2015 CESNET, z.s.p.o.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of the Company nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* ALTERNATIVELY, provided that this notice is retained in full, this
* product may be distributed under the terms of the GNU General Public
* License (GPL) version 2 or later, in which case the provisions
* of the GPL apply INSTEAD OF those given above.
*
* This software is provided ``as is, and any express or implied
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose are disclaimed.
* In no event shall the company or contributors be liable for any
* direct, indirect, incidental, special, exemplary, or consequential
* damages (including, but not limited to, procurement of substitute
* goods or services; loss of use, data, or profits; or business
* interruption) however caused and on any theory of liability, whether
* in contract, strict liability, or tort (including negligence or
* otherwise) arising in any way out of the use of this software, even
* if advised of the possibility of such damage.
*
*/
/**
* \defgroup postgresOutput Plugin for storing IPFIX data in PostgreSQL database.
* \ingroup storagePlugins
*
* @{
*/
#include <stdio.h>
#include <libpq-fe.h>
#include <unistd.h>
#include <string.h>
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <assert.h>
#include <arpa/inet.h>
#include <inttypes.h>
#include <endian.h>
#include <ipfixcol.h>
#include "ipfix_entities.h"
#include "ipfix_postgres_types.h"
/* API version constant */
IPFIXCOL_API_VERSION;
/* default database name, used if not specified otherwise */
#define DEFAULT_CONFIG_DBNAME "ipfix_data"
/* prefix for every table that will be created in database */
#define TABLE_NAME_PREFIX "Template"
/* table name length */
#define TABLE_NAME_LEN 128
/* default length of the SQL commands */
#define SQL_COMMAND_LENGTH 2048
/* number of store packet call in one transaction */
#define TRANSACTION_MAX 2
/** Identifier to MSG_* macros */
static char *msg_module = "postgres storage";
/**
* \struct postgres_config
*
* \brief PostgreSQL storage plugin specific "config" structure
*/
struct postgres_config {
PGconn *conn; /** database connection */
uint16_t *table_names; /** list of tables in database, every table corresponds to a template */
uint16_t table_counter; /** number of known tables in database */
uint16_t table_size; /** size of the table_names member */
uint32_t transaction_counter; /**< Number of store_packet calls in current transaction */
};
/**
* \brief Begin SQL transaction if necessary
*
* Transaction is used for TRANSACTION_MAX store_packet calls.
* This should be used only in store_packet function
* Transaction can be cancelled on error by calling restart_transaction
*
* \param[in] conf
*/
inline static void begin_transaction(struct postgres_config *conf)
{
PGresult *res;
/* when transaction counter is zero, begin new transaction */
if (conf->transaction_counter == 0) {
res = PQexec(conf->conn, "BEGIN;");
if (PQresultStatus(res) != PGRES_COMMAND_OK) {
MSG_ERROR(msg_module, "PostgreSQL: %s", PQerrorMessage(conf->conn));
}
PQclear(res);
}
/* increase the counter. When TRASNSACTION_MAX is reached,
* counter is zero and transaction is commited */
conf->transaction_counter = (conf->transaction_counter + 1) % TRANSACTION_MAX;
}
/**
* \brief Commit SQL transaction if necessary
*
* Transaction is used for TRANSACTION_MAX store_packet calls.
*
* \param[in] conf
*/
inline static void commit_transaction(struct postgres_config *conf)
{
PGresult *res;
/* when transaction counter is zero, it's time to commit */
if (conf->transaction_counter == 0) {
res = PQexec(conf->conn, "COMMIT;");
if (PQresultStatus(res) != PGRES_COMMAND_OK) {
MSG_ERROR(msg_module, "PostgreSQL: %s", PQerrorMessage(conf->conn));
}
PQclear(res);
}
}
/**
* \brief Restart SQL transaction
*
* Use on error to cancel the transaction and start a new one.
*
* \param[in] conf
*/
inline static void restart_transaction(struct postgres_config *conf)
{
conf->transaction_counter = 0;
commit_transaction(conf);
begin_transaction(conf);
}
/**
* \brief get corresponding PostgreSQL data type for IPFIX data type
*
* \param[in] ipfix_type IPFIX data type
* \return NULL if IPFX data type is invalid or unknown, corresponding PostgreSQL data type otherwise
*/
static char *get_postgres_data_type(const char *ipfix_type)
{
int i = 0;
if (ipfix_type == NULL) {
return NULL;
}
while (i < NUMBER_OF_TYPES) {
if (!strcmp(types[i].ipfix_data_type, ipfix_type)) {
return types[i].postgres_data_type;
}
i++;
}
/* no such type */
return NULL;
}
/**
* \brief Translate IPFIX data type specified as string to its numerical equivalent
*
* For internal usage in switch statement
*
* \param[in] ipfix_type IPFIX data type
* \return -1 on invalid IPFIX type, positive value otherwise
*/
static int ipfix_type_to_internal(const char *ipfix_type)
{
int i = 0;
if (ipfix_type == NULL) {
return -1;
}
while (i < NUMBER_OF_TYPES) {
if (!strcmp(types[i].ipfix_data_type, ipfix_type)) {
return types[i].internal_type;
}
i++;
}
/* no such type */
return -1;
}
/**
* \brief Get IPFIX data type from Information Element ID
*
* \param[in] ie_id Information Element ID
* \return IPFIX data type of the Element, NULL otherwise.
*/
static char *get_ie_type(uint16_t ie_id)
{
if (ie_id > NUMBER_OF_IPFIX_ENTITIES) {
/* this is invalid Information Element ID */
return NULL;
}
return ipfix_entities[ie_id].type;
}
/**
* \brief Translate Information Element ID to its IPFIX name.
*
* \param[in] ie_id Information Element ID
* \return string containing name of the Information Element
*/
static char *get_ie_name(uint16_t ie_id)
{
if (ie_id > NUMBER_OF_IPFIX_ENTITIES) {
/* this is invalid Information Element ID */
return NULL;
}
return ipfix_entities[ie_id].name;
}
/**
* \brief Create new table in DB
*
* \param[in] config config structure
* \param[in] template IPFIX template to create table for
* \return 0 on success
*/
static int create_table(struct postgres_config *config, struct ipfix_template *template)
{
PGresult *res;
char *sql_command;
uint16_t sql_command_len = SQL_COMMAND_LENGTH;
uint16_t u;
int index;
char *postgres_type;
char *ipfix_type;
char *column_name;
uint16_t ie_id; /* enterprise element */
uint32_t pen;
char ie_id_str[15];
uint8_t *fields;
uint16_t unknown_column_name_num = 0;
char unknown_column_name_str[20];
int sql_len;
memset(ie_id_str, 0, sizeof(ie_id_str));
memset(unknown_column_name_str, 0, sizeof(unknown_column_name_str));
sql_command = (char *) malloc(sql_command_len);
if (!sql_command) {
MSG_ERROR(msg_module, "Out of memory (%s:%d)", __FILE__, __LINE__);
return -1;
}
memset(sql_command, 0, sql_command_len);
sql_len = 0;
/* create SQL command */
sql_len += snprintf(sql_command, sql_command_len, "%s%u%s", "CREATE TABLE IF NOT EXISTS \"Template", template->original_id, "\" (");
/* get columns from template */
index = 0;
fields = (uint8_t *) template->fields;
for (u = 0; u < template->field_count; u++) {
ie_id = 0;
column_name = get_ie_name(*((uint16_t *) (fields+index)));
if (*((uint16_t *) (fields+index)) >> 15) {
/* this is Enterprise ID, we will store such data in column
* of type "bytea" (array of bytes without specific meaning) */
postgres_type = "bytea";
ie_id = *((uint16_t *) (fields+index));
ie_id &= 0x7fff; /* drop most significant bit */
pen = *((uint32_t *) (fields+index+4));
sprintf(ie_id_str, "ie%hupen%u", ie_id, pen);
column_name = ie_id_str;
index += 8; /* IE ID (2) + length (2) + Enterprise Number (4) */
} else {
/* regular information element */
ipfix_type = get_ie_type(*((uint16_t *) (fields+index)));
if (!ipfix_type) {
/* unknown data type, we will pretend it's byte array */
postgres_type = "bytea";
sprintf(unknown_column_name_str, "unknown_%u", unknown_column_name_num);
++unknown_column_name_num;
column_name = unknown_column_name_str;
} else {
/* get corresponding postgres data type */
postgres_type = get_postgres_data_type(ipfix_type);
}
index += 4;
}
sql_len += snprintf(sql_command+sql_len, sql_command_len-sql_len,
"\"%s\" %s,", column_name, postgres_type);
}
/* get rid of comma on the end of the command */
sql_command[strlen(sql_command)-1] = '\0';
sql_len -= 1;
sql_len += snprintf(sql_command+sql_len, sql_command_len-sql_len, ")");
/* DEBUG */
// fprintf(stderr, "DEBUG: %s\n", sql_command);
/* execute the command */
res = PQexec(config->conn, sql_command);
if (PQresultStatus(res) != PGRES_COMMAND_OK) {
MSG_ERROR(msg_module, "PostgreSQL: %s", PQerrorMessage(config->conn));
PQclear(res);
restart_transaction(config);
goto err_sql_command;
}
PQclear(res);
free(sql_command);
return 0; /* table successfully created */
err_sql_command:
free(sql_command);
return -1;
}
/**
* \brief INSERT INTO
*
* \param[in] config config structure
* \param[in] table_name name of the table
* \param[in] couple template+data couple
* \return 0 on success
*/
static int insert_into(struct postgres_config *conf, const char *table_name, const struct data_template_couple *couple)
{
PGresult *res;
uint16_t data_index;
uint16_t template_index;
uint16_t u;
uint16_t ie_id;
uint16_t length;
size_t to_length;
struct ipfix_data_set *data_set = couple->data_set;
struct ipfix_template *template = couple->data_template;
char *ipfix_type;
char *sql_command;
uint16_t sql_command_max_len = SQL_COMMAND_LENGTH;
uint16_t sql_len; /* current length of the SQL command */
uint8_t *fields;
uint8_t extra_bytes;
char *bytea_str;
uint8_t uint8;
uint16_t uint16;
uint32_t uint32;
uint64_t uint64;
int8_t int8;
int16_t int16;
int32_t int32;
int64_t int64;
float float32;
double float64;
char ip_addr[INET6_ADDRSTRLEN];
uint8_t mac_addr[6];
char *string;
sql_command = (char *) malloc(sql_command_max_len);
if (!sql_command) {
MSG_ERROR(msg_module, "Out of memory (%s:%d)", __FILE__, __LINE__);
return -1;
}
memset(sql_command, 0, sql_command_max_len);
fields = (uint8_t *) template->fields;
data_index = 0;
template_index = 0;
sql_len = 0;
while (data_index < (ntohs(data_set->header.length) - (template->data_length & 0x7fffffff)-1)) {
if (sql_len == 0) {
sql_len += snprintf(sql_command, sql_command_max_len,
"INSERT INTO \"%s\" VALUES (", table_name);
} else {
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, ",(");
/* enlarge the memory for command */
sql_command_max_len += SQL_COMMAND_LENGTH;
sql_command = realloc(sql_command, sql_command_max_len);
if (!sql_command) {
MSG_ERROR(msg_module, "Out of memory (%s:%d)", __FILE__, __LINE__);
return -1;
}
}
for (u = 0; u < template->field_count; u++) {
ie_id = *((uint16_t *) (fields+template_index));
length = *((uint16_t *) (fields+template_index+2));
/* check whether this element has variable length */
if (length == VAR_IE_LENGTH) {
/* this element's length is in data, not in template */
length = *((uint8_t *) (data_set->records+data_index));
data_index += 1;
if (length == 255) {
length = ntohs(*((uint16_t *) (data_set->records+data_index)));
data_index += 2;
}
}
/* next column value -> put comma in SQL command */
if (u > 0) {
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "%c", ',');
}
if (ie_id >> 15) {
/* it is Enterprise Element */
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "E'");
/* escape binary data for use within an SQL command */
bytea_str = (char *) PQescapeByteaConn(conf->conn,
(unsigned char *) (data_set->records+data_index), length, &to_length);
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "%s", bytea_str);
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "'");
PQfreemem(bytea_str);
template_index += 8;
data_index += length;
} else {
/* no Enterprise Element */
ipfix_type = get_ie_type(ie_id);
template_index += 4;
switch(ipfix_type_to_internal(ipfix_type)) {
case (UINT8):
uint8 = *((uint8_t *) (data_set->records+data_index));
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "%u", uint8);
break;
case (UINT16):
uint16 = *((uint16_t *) (data_set->records+data_index));
if ((extra_bytes = sizeof(uint16_t) - length) != 0) {
/* exporter used fewer bytes to encode information element */
uint16 = (uint16 << (extra_bytes * 8)) >> (extra_bytes * 8);
/* now we need to convert given value to host byte order */
switch (length) {
case sizeof(uint8_t):
/* no need for byte order conversion */
break;
}
} else {
/* length in template corresponds to length in RFC */
uint16 = ntohs(uint16);
}
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "%u", uint16);
break;
case (UINT32):
uint32 = *((uint32_t *) (data_set->records+data_index));
if ((extra_bytes = sizeof(uint32_t) - length) != 0) {
/* exporter used fewer bytes to encode information element */
uint32 = (uint32 << (extra_bytes * 8)) >> (extra_bytes * 8);
/* now we need to convert given value to host byte order */
switch (length) {
case sizeof(uint8_t):
/* no need for byte order conversion */
break;
case sizeof(uint16_t):
uint32 = (uint32_t) ntohs((uint16_t) uint32);
break;
}
} else {
/* length in template corresponds to length in RFC */
uint32 = ntohl(uint32);
}
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "%u", uint32);
break;
case (UINT64):
uint64 = *((uint64_t *) (data_set->records+data_index));
if ((extra_bytes = sizeof(uint64_t) - length) != 0) {
/* exporter used fewer bytes to encode information element */
uint64 = (uint64 << (extra_bytes * 8)) >> (extra_bytes * 8);
/* now we need to convert given value to host byte order */
switch (length) {
case sizeof(uint8_t):
/* no need for byte order conversion */
break;
case sizeof(uint16_t):
uint64 = (uint64_t) ntohs((uint16_t) uint64);
break;
case sizeof(uint32_t):
uint64 = (uint64_t) ntohl((uint32_t) uint64);
break;
}
} else {
/* length in template corresponds to length in RFC */
uint64 = be64toh(uint64);
}
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"%"PRIu64, uint64);
break;
case (INT8):
int8 = (int8_t) *((uint8_t *) (data_set->records+data_index));
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"%d", int8);
break;
case (INT16):
int16 = (int16_t) *((uint16_t *) (data_set->records+data_index));
if ((extra_bytes = sizeof(int16_t) - length) != 0) {
/* exporter used fewer bytes to encode information element */
int16 = (int16 << (extra_bytes * 8)) >> (extra_bytes * 8);
/* now we need to convert given value to host byte order */
switch (length) {
case sizeof(int8_t):
/* no need for byte order conversion */
break;
}
} else {
/* length in template corresponds to length in RFC */
int16 = ntohs((uint16_t) int16);
}
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"%d", int16);
break;
case (INT32):
int32 = (int32_t) *((uint32_t *) (data_set->records+data_index));
if ((extra_bytes = sizeof(int32_t) - length) != 0) {
/* exporter used fewer bytes to encode information element */
uint32 = (uint32 << (extra_bytes * 8)) >> (extra_bytes * 8);
/* now we need to convert given value to host byte order */
switch (length) {
case sizeof(int8_t):
/* no need for byte order conversion */
break;
case sizeof(int16_t):
int32 = (int32_t) ntohs((uint16_t) int32);
break;
}
} else {
/* length in template corresponds to length in RFC */
int32 = ntohl((uint32_t) int32);
}
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"%d", int32);
break;
case (INT64):
int64 = (int64_t) *((uint64_t *) (data_set->records+data_index));
if ((extra_bytes = sizeof(int64_t) - length) != 0) {
/* exporter used fewer bytes to encode information element */
int64 = (int64 << (extra_bytes * 8)) >> (extra_bytes * 8);
/* now we need to convert given value to host byte order */
switch (length) {
case sizeof(int8_t):
/* no need for byte order conversion */
break;
case sizeof(int16_t):
int64 = (int64_t) ntohs((uint16_t) int64);
break;
case sizeof(int32_t):
int64 = (int64_t) ntohl((uint32_t) int64);
break;
}
} else {
/* length in template corresponds to length in RFC */
int64 = be64toh((uint64_t) int64);
}
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"%"PRId64, int64);
break;
case (STRING):
string = (char *) malloc(length + 1);
if (!string) {
MSG_ERROR(msg_module, "Out of memory (%s:%d)", __FILE__, __LINE__);
goto err_sql_command;
}
memset(string, 0, length + 1);
data_index += length;
memcpy(string, data_set->records+data_index, length);
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"'%s'", string);
free(string);
string = NULL;
break;
case (BOOLEAN):
uint8 = *((uint8_t *) data_set->records+data_index);
string = "NULL";
/* in IPFIX, boolean is encoded in single octet
* 1 means TRUE, 2 means FALSE */
switch (uint8) {
case (1):
string = "true";
break;
case (2):
string = "false";
break;
}
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"%s", string);
break;
case (IPV4ADDR):
uint32 = *((uint32_t *) (data_set->records+data_index));
inet_ntop(AF_INET, data_set->records+data_index, ip_addr, INET6_ADDRSTRLEN);
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"'%s'", ip_addr);
break;
case (IPV6ADDR):
inet_ntop(AF_INET6, data_set->records+data_index, ip_addr, INET6_ADDRSTRLEN);
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"'%s'", ip_addr);
break;
case (MACADDR):
mac_addr[5] = *((uint8_t *) (data_set->records+data_index));
mac_addr[4] = *((uint8_t *) (data_set->records+data_index+1));
mac_addr[3] = *((uint8_t *) (data_set->records+data_index+2));
mac_addr[2] = *((uint8_t *) (data_set->records+data_index+3));
mac_addr[1] = *((uint8_t *) (data_set->records+data_index+4));
mac_addr[0] = *((uint8_t *) (data_set->records+data_index+5));
data_index += 6;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"'%x:%x:%x:%x:%x:%x'", mac_addr[0], mac_addr[1],
mac_addr[2], mac_addr[3], mac_addr[4],
mac_addr[5]);
break;
case (OCTETARRAY):
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "E'");
/* escape binary data for use within an SQL command */
bytea_str = (char *) PQescapeByteaConn(conf->conn,
(unsigned char *) (data_set->records+data_index), length, &to_length);
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "%s", bytea_str);
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "'");
PQfreemem(bytea_str);
data_index += length;
break;
case (DATETIMESECONDS):
uint32 = ntohl(*((uint32_t *) data_set->records+data_index));
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"to_timestamp(%u)", uint32);
break;
case (DATETIMEMILLISECONDS):
case (DATETIMEMICROSECONDS):
case (DATETIMENANOSECONDS):
/* according to RFC 5101, it is encoded as 64-bit integer */
uint64 = be64toh(*((uint64_t *) (data_set->records+data_index)));
data_index += length;
/* PostgreSQL expects microseconds */
switch (ipfix_type_to_internal(ipfix_type)) {
case (DATETIMEMILLISECONDS):
float64 = uint64 / 1000;
break;
case (DATETIMEMICROSECONDS):
float64 = uint64 / 1000000;
break;
case (DATETIMENANOSECONDS):
float64 = uint64 / 1000000000;
break;
default:
float64 = uint64; /* Unknown date type */
}
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"to_timestamp(%f)", float64);
break;
case (FLOAT32):
float32 = *((float *) (data_set->records+data_index));
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"%f", float32);
break;
case (FLOAT64):
float64 = *((double *) (data_set->records+data_index));
data_index += length;
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len,
"%f", float64);
break;
default:
/* we don't know nothing about this data type, so we just store the data in hex format */
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "E'");
/* escape binary data for use within an SQL command */
bytea_str = (char *) PQescapeByteaConn(conf->conn,
(unsigned char *) (data_set->records+data_index), length, &to_length);
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "%s", bytea_str);
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "'");
PQfreemem(bytea_str);
data_index += length;
break;
}
}
}
sql_len += snprintf(sql_command+sql_len, sql_command_max_len-sql_len, "%s", ")");
template_index = 0;
}
/* DEBUG */
//fprintf(stderr, "\nDEBUG: SQL command to execute:\n %s\n", sql_command);
res = PQexec(conf->conn, sql_command);
if (PQresultStatus(res) != PGRES_COMMAND_OK) {
MSG_ERROR(msg_module, "PostgreSQL: %s", PQerrorMessage(conf->conn));
PQclear(res);
restart_transaction(conf);
goto err_sql_command;
}
PQclear(res);
free(sql_command);
return 0;
err_sql_command:
free(sql_command);
return -1;
}
/**
* \brief Process new templates
*
* New template means new table in DB.
*
* \param[in] conf config structure
* \param[in] ipfix_msg IPFIX message
* \return 0 on success
*/
static int process_new_templates(struct postgres_config *conf, const struct ipfix_message *ipfix_msg)
{
uint16_t template_index = 0;
struct ipfix_template *template;
uint16_t u;
uint8_t flag = 0;
if (conf == NULL || ipfix_msg == NULL) {
return -1;
}
while ((template = ipfix_msg->data_couple[template_index].data_template) != NULL) {
flag = 1; /* create table if list is empty */
/* check whether table for the template exists */
for (u = 0; u < conf->table_counter; u++) {
if (conf->table_names[u] == template->original_id) {
/* table for this template already exists */
flag = 0;
break;
}
}
if (flag) {
/* create new table */
create_table(conf, template);
if (conf->table_counter >= conf->table_size) {
/* we have to reallocate array of table names */
if (realloc(conf->table_names, conf->table_size * 2) == NULL) {
MSG_ERROR(msg_module, "Out of memory (%s:%d)", __FILE__, __LINE__);
} else {
conf->table_size *= 2;
}
}
conf->table_names[conf->table_counter] = template->original_id;
conf->table_counter += 1;
flag = 0;
}
template_index++;
}
return 0;
}
/**
* \brief Process Data Sets
*
* \param[in] conf
* \param[in] ipfix_msg
* \return 0 on success
*/
static int process_data_records(struct postgres_config *conf, const struct ipfix_message *ipfix_msg)
{
uint16_t set_index = 0;
struct ipfix_data_set *data_set;
char table_name[TABLE_NAME_LEN];
if (conf == NULL || ipfix_msg == NULL) {
return -1;
}
while ((data_set = ipfix_msg->data_couple[set_index].data_set) != NULL) {
if (ipfix_msg->data_couple[set_index].data_template == NULL) {
/* no template for data record, skip */
set_index++;
continue;
}
snprintf(table_name, TABLE_NAME_LEN, TABLE_NAME_PREFIX "%u", ipfix_msg->data_couple[set_index].data_template->original_id);
insert_into(conf, table_name, &(ipfix_msg->data_couple[set_index]));
set_index++;
}
return 0;
}
/**
* \brief Storage plugin initialization.
*
* Initialize IPFIX storage plugin. This function allocates, fills and
* returns config structure.
*
* \param[in] params parameters for this storage plugin
* \param[out] config the plugin specific configuration structure
* \return 0 on success, negative value otherwise
*/
int storage_init(char *params, void **config)
{
struct postgres_config *conf;
PGconn *conn;
char *connection_string = NULL; /* PostgreSQL connection string */
xmlDocPtr doc;
xmlNodePtr cur;
char *host = NULL;
char *hostaddr = NULL;
char *port = NULL;
char *dbname = NULL;
uint8_t dbname_allocated = 0; /* indicates whether dbname was allocated via malloc() */
char *user = NULL;
char *pass = NULL;
size_t connection_string_len;
size_t str_len;
conf = (struct postgres_config *) malloc(sizeof(*conf));
if (!conf) {
MSG_ERROR(msg_module, "Out of memory (%s:%d)", __FILE__, __LINE__);
return -1;
}
memset(conf, 0, sizeof(*conf));
doc = xmlReadMemory(params, strlen(params), "nobase.xml", NULL, 0);
if (doc == NULL) {
MSG_ERROR(msg_module, "Plugin configuration not parsed successfully");
goto err_init;
}
cur = xmlDocGetRootElement(doc);
if (cur == NULL) {
MSG_ERROR(msg_module, "Empty configuration");
goto err_xml;
}
if (xmlStrcmp(cur->name, (const xmlChar *) "fileWriter")) {
MSG_ERROR(msg_module, "root node != fileWriter");
goto err_xml;
}
cur = cur->xmlChildrenNode;
while (cur != NULL) {
if ((!xmlStrcmp(cur->name, (const xmlChar *) "host"))) {
if (host != NULL) {
xmlFree(host);
host = NULL;
}
host = (char *) xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
}
if ((!xmlStrcmp(cur->name, (const xmlChar *) "hostaddr"))) {
if (hostaddr != NULL) {
xmlFree(hostaddr);
hostaddr = NULL;
}
hostaddr = (char *) xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
}
if ((!xmlStrcmp(cur->name, (const xmlChar *) "port"))) {
if (port != NULL) {
xmlFree(port);
port = NULL;
}
port = (char *) xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);