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gkhash.c
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gkhash.c
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/**
* gkhash.c -- default hash table functions
* ______ ___
* / ____/___ / | _____________ __________
* / / __/ __ \/ /| |/ ___/ ___/ _ \/ ___/ ___/
* / /_/ / /_/ / ___ / /__/ /__/ __(__ |__ )
* \____/\____/_/ |_\___/\___/\___/____/____/
*
* The MIT License (MIT)
* Copyright (c) 2009-2016 Gerardo Orellana <hello @ goaccess.io>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gkhash.h"
#include "error.h"
#include "sort.h"
#include "util.h"
#include "xmalloc.h"
/* Hash tables storage */
static GKHashStorage *gkh_storage;
/* *INDENT-OFF* */
/* Hash tables used across the whole app */
static khash_t (is32) *ht_agent_vals = NULL;
static khash_t (si32) *ht_agent_keys = NULL;
static khash_t (si32) *ht_unique_keys = NULL;
static khash_t (ss32) *ht_hostnames = NULL;
/* *INDENT-ON* */
/* Instantiate a new store */
static GKHashStorage *
new_gkhstorage (uint32_t size)
{
GKHashStorage *storage = xcalloc (size, sizeof (GKHashStorage));
return storage;
}
/* Initialize a new int key - int value hash table */
static
khash_t (ii32) *
new_ii32_ht (void)
{
khash_t (ii32) * h = kh_init (ii32);
return h;
}
/* Initialize a new int key - string value hash table */
static
khash_t (is32) *
new_is32_ht (void)
{
khash_t (is32) * h = kh_init (is32);
return h;
}
/* Initialize a new int key - uint64_t value hash table */
static
khash_t (iu64) *
new_iu64_ht (void)
{
khash_t (iu64) * h = kh_init (iu64);
return h;
}
/* Initialize a new string key - int value hash table */
static
khash_t (si32) *
new_si32_ht (void)
{
khash_t (si32) * h = kh_init (si32);
return h;
}
/* Initialize a new string key - string value hash table */
static
khash_t (ss32) *
new_ss32_ht (void)
{
khash_t (ss32) * h = kh_init (ss32);
return h;
}
/* Initialize a new int key - int value hash table */
static
khash_t (igsl) *
new_igsl_ht (void)
{
khash_t (igsl) * h = kh_init (igsl);
return h;
}
/* Initialize a new int key - uint64_t value hash table */
static
khash_t (su64) *
new_su64_ht (void)
{
khash_t (su64) * h = kh_init (su64);
return h;
}
/* Destroys both the hash structure and the keys for a
* string key - int value hash */
static void
des_si32_free (khash_t (si32) * hash)
{
khint_t k;
if (!hash)
return;
for (k = 0; k < kh_end (hash); ++k) {
if (kh_exist (hash, k)) {
free ((char *) kh_key (hash, k));
}
}
kh_destroy (si32, hash);
}
/* Destroys both the hash structure and its string values */
static void
des_is32_free (khash_t (is32) * hash)
{
khint_t k;
if (!hash)
return;
for (k = 0; k < kh_end (hash); ++k) {
if (kh_exist (hash, k)) {
free ((char *) kh_value (hash, k));
}
}
kh_destroy (is32, hash);
}
/* Destroys both the hash structure and its string
* keys and string values */
static void
des_ss32_free (khash_t (ss32) * hash)
{
khint_t k;
if (!hash)
return;
for (k = 0; k < kh_end (hash); ++k) {
if (kh_exist (hash, k)) {
free ((char *) kh_key (hash, k));
free ((char *) kh_value (hash, k));
}
}
kh_destroy (ss32, hash);
}
/* Destroys the hash structure */
static void
des_ii32 (khash_t (ii32) * hash)
{
if (!hash)
return;
kh_destroy (ii32, hash);
}
/* Destroys both the hash structure and its GSLList
* values */
static void
des_igsl_free (khash_t (igsl) * hash)
{
khint_t k;
void *list = NULL;
if (!hash)
return;
for (k = 0; k < kh_end (hash); ++k) {
if (kh_exist (hash, k) && (list = kh_value (hash, k))) {
list_remove_nodes (list);
}
}
kh_destroy (igsl, hash);
}
/* Destroys both the hash structure and the keys for a
* string key - uint64_t value hash */
static void
des_su64_free (khash_t (su64) * hash)
{
if (!hash)
return;
kh_destroy (su64, hash);
}
/* Destroys the hash structure */
static void
des_iu64 (khash_t (iu64) * hash)
{
if (!hash)
return;
kh_destroy (iu64, hash);
}
/* Initialize map & metric hashes */
static void
init_tables (GModule module)
{
int n = 0, i;
/* *INDENT-OFF* */
GKHashMetric metrics[] = {
{MTRC_KEYMAP , MTRC_TYPE_SI32 , {.si32 = new_si32_ht ()}} ,
{MTRC_ROOTMAP , MTRC_TYPE_IS32 , {.is32 = new_is32_ht ()}} ,
{MTRC_DATAMAP , MTRC_TYPE_IS32 , {.is32 = new_is32_ht ()}} ,
{MTRC_UNIQMAP , MTRC_TYPE_SI32 , {.si32 = new_si32_ht ()}} ,
{MTRC_ROOT , MTRC_TYPE_II32 , {.ii32 = new_ii32_ht ()}} ,
{MTRC_HITS , MTRC_TYPE_II32 , {.ii32 = new_ii32_ht ()}} ,
{MTRC_VISITORS , MTRC_TYPE_II32 , {.ii32 = new_ii32_ht ()}} ,
{MTRC_BW , MTRC_TYPE_IU64 , {.iu64 = new_iu64_ht ()}} ,
{MTRC_CUMTS , MTRC_TYPE_IU64 , {.iu64 = new_iu64_ht ()}} ,
{MTRC_MAXTS , MTRC_TYPE_IU64 , {.iu64 = new_iu64_ht ()}} ,
{MTRC_METHODS , MTRC_TYPE_IS32 , {.is32 = new_is32_ht ()}} ,
{MTRC_PROTOCOLS , MTRC_TYPE_IS32 , {.is32 = new_is32_ht ()}} ,
{MTRC_AGENTS , MTRC_TYPE_IGSL , {.igsl = new_igsl_ht ()}} ,
{MTRC_METADATA , MTRC_TYPE_SU64 , {.su64 = new_su64_ht ()}} ,
};
/* *INDENT-ON* */
n = ARRAY_SIZE (metrics);
for (i = 0; i < n; i++) {
gkh_storage[module].metrics[i] = metrics[i];
}
}
/* Initialize hash tables */
void
init_storage (void)
{
GModule module;
size_t idx = 0;
/* Hashes used across the whole app (not per module) */
ht_agent_keys = (khash_t (si32) *) new_si32_ht ();
ht_agent_vals = (khash_t (is32) *) new_is32_ht ();
ht_hostnames = (khash_t (ss32) *) new_ss32_ht ();
ht_unique_keys = (khash_t (si32) *) new_si32_ht ();
gkh_storage = new_gkhstorage (TOTAL_MODULES);
FOREACH_MODULE (idx, module_list) {
module = module_list[idx];
gkh_storage[module].module = module;
init_tables (module);
}
}
static void
free_metric_type (GKHashMetric mtrc)
{
/* Determine the hash structure type */
switch (mtrc.type) {
case MTRC_TYPE_II32:
des_ii32 (mtrc.ii32);
break;
case MTRC_TYPE_IS32:
des_is32_free (mtrc.is32);
break;
case MTRC_TYPE_IU64:
des_iu64 (mtrc.iu64);
break;
case MTRC_TYPE_SI32:
des_si32_free (mtrc.si32);
break;
case MTRC_TYPE_SS32:
des_ss32_free (mtrc.ss32);
break;
case MTRC_TYPE_IGSL:
des_igsl_free (mtrc.igsl);
break;
case MTRC_TYPE_SU64:
des_su64_free (mtrc.su64);
break;
}
}
/* Destroys the hash structure allocated metrics */
static void
free_metrics (GModule module)
{
int i;
GKHashMetric mtrc;
for (i = 0; i < GSMTRC_TOTAL; i++) {
mtrc = gkh_storage[module].metrics[i];
free_metric_type (mtrc);
}
}
/* Destroys the hash structure and its content */
void
free_storage (void)
{
size_t idx = 0;
des_is32_free (ht_agent_vals);
des_si32_free (ht_agent_keys);
des_si32_free (ht_unique_keys);
des_ss32_free (ht_hostnames);
if (!gkh_storage)
return;
FOREACH_MODULE (idx, module_list) {
free_metrics (module_list[idx]);
}
free (gkh_storage);
}
/* Given a module and a metric, get the hash table
*
* On error, or if table is not found, NULL is returned.
* On success the hash structure pointer is returned. */
static void *
get_hash (GModule module, GSMetric metric)
{
void *hash = NULL;
int i;
GKHashMetric mtrc;
for (i = 0; i < GSMTRC_TOTAL; i++) {
if (hash != NULL)
break;
mtrc = gkh_storage[module].metrics[i];
if (mtrc.metric != metric)
continue;
/* Determine the hash structure type */
switch (mtrc.type) {
case MTRC_TYPE_II32:
hash = mtrc.ii32;
break;
case MTRC_TYPE_IS32:
hash = mtrc.is32;
break;
case MTRC_TYPE_IU64:
hash = mtrc.iu64;
break;
case MTRC_TYPE_SI32:
hash = mtrc.si32;
break;
case MTRC_TYPE_SS32:
hash = mtrc.ss32;
break;
case MTRC_TYPE_IGSL:
hash = mtrc.igsl;
break;
case MTRC_TYPE_SU64:
hash = mtrc.su64;
break;
}
}
return hash;
}
/* Insert a string key and the corresponding int value.
* Note: If the key exists, the value is not replaced.
*
* On error, or if key exists, -1 is returned.
* On success 0 is returned */
static int
ins_si32 (khash_t (si32) * hash, const char *key, int value)
{
khint_t k;
int ret;
char *dupkey = NULL;
if (!hash)
return -1;
dupkey = xstrdup (key);
k = kh_put (si32, hash, dupkey, &ret);
/* operation failed, or key exists */
if (ret == -1 || ret == 0) {
free (dupkey);
return -1;
}
kh_val (hash, k) = value;
return 0;
}
/* Insert an int key and the corresponding string value.
* Note: If the key exists, the value is not replaced.
*
* On error, or if key exists, -1 is returned.
* On success 0 is returned */
static int
ins_is32 (khash_t (is32) * hash, int key, const char *value)
{
khint_t k;
int ret;
if (!hash)
return -1;
k = kh_put (is32, hash, key, &ret);
if (ret == -1 || ret == 0)
return -1;
kh_val (hash, k) = xstrdup (value);
return 0;
}
/* Insert a string key and the corresponding string value.
* Note: If the key exists, the value is not replaced.
*
* On error, or if key exists, -1 is returned.
* On success 0 is returned */
static int
ins_ss32 (khash_t (ss32) * hash, const char *key, const char *value)
{
khint_t k;
int ret;
char *dupkey = NULL;
if (!hash)
return -1;
dupkey = xstrdup (key);
k = kh_put (ss32, hash, dupkey, &ret);
/* operation failed, or key exists */
if (ret == -1 || ret == 0) {
free (dupkey);
return -1;
}
kh_val (hash, k) = xstrdup (value);
return 0;
}
/* Insert an int key and an int value
* Note: If the key exists, its value is replaced by the given value.
*
* On error, -1 is returned.
* On success 0 is returned */
static int
ins_ii32 (khash_t (ii32) * hash, int key, int value)
{
khint_t k;
int ret;
if (!hash)
return -1;
k = kh_put (ii32, hash, key, &ret);
if (ret == -1)
return -1;
kh_val (hash, k) = value;
return 0;
}
/* Insert an int key and a uint64_t value
* Note: If the key exists, its value is replaced by the given value.
*
* On error, -1 is returned.
* On success 0 is returned */
static int
ins_iu64 (khash_t (iu64) * hash, int key, uint64_t value)
{
khint_t k;
int ret;
if (!hash)
return -1;
k = kh_put (iu64, hash, key, &ret);
if (ret == -1)
return -1;
kh_val (hash, k) = value;
return 0;
}
/* Increase an int value given an int key.
* Note: If the key exists, its value is increased by the given inc.
*
* On error, -1 is returned.
* On success the inserted value is returned */
static int
inc_ii32 (khash_t (ii32) * hash, int key, int inc)
{
khint_t k;
int ret, value = inc;
if (!hash)
return -1;
k = kh_get (ii32, hash, key);
/* key found, increment current value by the given `inc` */
if (k != kh_end (hash))
value = kh_val (hash, k) + inc;
k = kh_put (ii32, hash, key, &ret);
if (ret == -1)
return -1;
kh_val (hash, k) = value;
return value;
}
/* Increase a uint64_t value given a string key.
*
* On error, -1 is returned.
* On success 0 is returned */
static int
inc_su64 (khash_t (su64) * hash, const char *key, uint64_t inc)
{
khint_t k;
int ret;
uint64_t value = inc;
if (!hash)
return -1;
k = kh_get (su64, hash, key);
/* key not found, set new value to the given `inc` */
if (k == kh_end (hash)) {
k = kh_put (su64, hash, key, &ret);
/* operation failed */
if (ret == -1)
return -1;
} else {
value = kh_val (hash, k) + inc;
}
kh_val (hash, k) = value;
return 0;
}
/* Increase a uint64_t value given an int key.
* Note: If the key exists, its value is increased by the given inc.
*
* On error, -1 is returned.
* On success 0 is returned */
static int
inc_iu64 (khash_t (iu64) * hash, int key, uint64_t inc)
{
khint_t k;
int ret;
uint64_t value = inc;
if (!hash)
return -1;
k = kh_get (iu64, hash, key);
/* key found, increment current value by the given `inc` */
if (k != kh_end (hash))
value = (uint64_t) kh_val (hash, k) + inc;
k = kh_put (iu64, hash, key, &ret);
if (ret == -1)
return -1;
kh_val (hash, k) = value;
return 0;
}
/* Insert a string key and auto increment int value.
*
* On error, -1 is returned.
* On success the value of the key inserted is returned */
static int
ins_si32_ai (khash_t (si32) * hash, const char *key)
{
int size = 0, value = 0;
if (!hash)
return -1;
size = kh_size (hash);
/* the auto increment value starts at SIZE (hash table) + 1 */
value = size > 0 ? size + 1 : 1;
if (ins_si32 (hash, key, value) == -1)
return -1;
return value;
}
/* Compare if the given needle is in the haystack
*
* if equal, 1 is returned, else 0 */
static int
find_int_key_in_list (void *data, void *needle)
{
return (*(int *) data) == (*(int *) needle) ? 1 : 0;
}
/* Insert an int key and the corresponding GSLList (Single linked-list) value.
* Note: If the key exists within the list, the value is not appended.
*
* On error, -1 is returned.
* On success 0 is returned */
static int
ins_igsl (khash_t (igsl) * hash, int key, int value)
{
khint_t k;
GSLList *list, *match;
int ret;
if (!hash)
return -1;
k = kh_get (igsl, hash, key);
/* key found, check if key exists within the list */
if (k != kh_end (hash) && (list = kh_val (hash, k))) {
if ((match = list_find (list, find_int_key_in_list, &value)))
return 0;
list = list_insert_prepend (list, int2ptr (value));
} else {
list = list_create (int2ptr (value));
}
k = kh_put (igsl, hash, key, &ret);
if (ret == -1)
return -1;
kh_val (hash, k) = list;
return 0;
}
/* Get the int value of a given string key.
*
* On error, -1 is returned.
* On success the int value for the given key is returned */
static int
get_si32 (khash_t (si32) * hash, const char *key)
{
khint_t k;
if (!hash)
return -1;
k = kh_get (si32, hash, key);
/* key found, return current value */
if (k != kh_end (hash))
return kh_val (hash, k);
return -1;
}
/* Get the string value of a given int key.
*
* On error, NULL is returned.
* On success the string value for the given key is returned */
static char *
get_is32 (khash_t (is32) * hash, int key)
{
khint_t k;
char *value = NULL;
if (!hash)
return NULL;
k = kh_get (is32, hash, key);
/* key found, return current value */
if (k != kh_end (hash) && (value = kh_val (hash, k)))
return xstrdup (value);
return NULL;
}
/* Get the string value of a given string key.
*
* On error, NULL is returned.
* On success the string value for the given key is returned */
static char *
get_ss32 (khash_t (ss32) * hash, const char *key)
{
khint_t k;
char *value = NULL;
if (!hash)
return NULL;
k = kh_get (ss32, hash, key);
/* key found, return current value */
if (k != kh_end (hash) && (value = kh_val (hash, k)))
return xstrdup (value);
return NULL;
}
/* Get the int value of a given int key.
*
* If key is not found, 0 is returned.
* On error, -1 is returned.
* On success the int value for the given key is returned */
static int
get_ii32 (khash_t (ii32) * hash, int key)
{
khint_t k;
int value = 0;
if (!hash)
return -1;
k = kh_get (ii32, hash, key);
/* key found, return current value */
if (k != kh_end (hash) && (value = kh_val (hash, k)))
return value;
return 0;
}
/* Get the uint64_t value of a given int key.
*
* On error, or if key is not found, 0 is returned.
* On success the uint64_t value for the given key is returned */
static uint64_t
get_iu64 (khash_t (iu64) * hash, int key)
{
khint_t k;
uint64_t value = 0;
if (!hash)
return 0;
k = kh_get (iu64, hash, key);
/* key found, return current value */
if (k != kh_end (hash) && (value = kh_val (hash, k)))
return value;
return 0;
}
/* Get the GSLList value of a given int key.
*
* On error, or if key is not found, NULL is returned.
* On success the GSLList value for the given key is returned */
static GSLList *
get_igsl (khash_t (igsl) * hash, int key)
{
khint_t k;
GSLList *list = NULL;
if (!hash)
return NULL;
k = kh_get (igsl, hash, key);
/* key found, return current value */
if (k != kh_end (hash) && (list = kh_val (hash, k)))
return list;
return NULL;
}
/* Get the uint64_t value of a given string key.
*
* On error, or if key is not found, 0 is returned.
* On success the uint64_t value for the given key is returned */
static uint64_t
get_su64 (khash_t (su64) * hash, const char *key)
{
khint_t k;
uint64_t val = 0;
if (!hash)
return 0;
k = kh_get (su64, hash, key);
/* key found, return current value */
if (k != kh_end (hash) && (val = kh_val (hash, k)))
return val;
return 0;
}
/* Iterate over all the key/value pairs for the given hash structure
* and set the maximum and minimum values found on an integer key and
* integer value.
*
* Note: This are expensive calls since it has to iterate over all
* key-value pairs
*
* If the hash structure is empty, no values are set.
* On success the minimum and maximum values are set. */
static void
get_ii32_min_max (khash_t (ii32) * hash, int *min, int *max)
{
khint_t k;
int curvalue = 0, i;
for (i = 0, k = kh_begin (hash); k != kh_end (hash); ++k) {
if (!kh_exist (hash, k))
continue;
curvalue = kh_value (hash, k);
if (i++ == 0)
*min = curvalue;
if (curvalue > *max)
*max = curvalue;
if (curvalue < *min)
*min = curvalue;
}
}
/* Iterate over all the key/value pairs for the given hash structure
* and set the maximum and minimum values found on an integer key and
* a uint64_t value.
*
* Note: This are expensive calls since it has to iterate over all
* key-value pairs
*
* If the hash structure is empty, no values are set.
* On success the minimum and maximum values are set. */
static void
get_iu64_min_max (khash_t (iu64) * hash, uint64_t * min, uint64_t * max)
{
khint_t k;
uint64_t curvalue = 0;
int i;
for (i = 0, k = kh_begin (hash); k != kh_end (hash); ++k) {
if (!kh_exist (hash, k))
continue;
curvalue = kh_value (hash, k);
if (i++ == 0)
*min = curvalue;
if (curvalue > *max)
*max = curvalue;
if (curvalue < *min)
*min = curvalue;
}
}
/* Insert a unique visitor key string (IP/DATE/UA), mapped to an auto
* incremented value.
*
* If the given key exists, its value is returned.
* On error, -1 is returned.
* On success the value of the key inserted is returned */
int
ht_insert_unique_key (const char *key)
{
int value = -1;
khash_t (si32) * hash = ht_unique_keys;
if (!hash)
return -1;
if ((value = get_si32 (hash, key)) != -1)
return value;
return ins_si32_ai (hash, key);
}
/* Insert a user agent key string, mapped to an auto incremented value.
*
* If the given key exists, its value is returned.
* On error, -1 is returned.
* On success the value of the key inserted is returned */
int
ht_insert_agent_key (const char *key)
{
int value = -1;
khash_t (si32) * hash = ht_agent_keys;
if (!hash)
return -1;
if ((value = get_si32 (hash, key)) != -1)
return value;
return ins_si32_ai (hash, key);
}
/* Insert a user agent int key, mapped to a user agent string value.
*
* On error, -1 is returned.
* On success 0 is returned */
int
ht_insert_agent_value (int key, const char *value)
{
khash_t (is32) * hash = ht_agent_vals;
if (!hash)
return -1;
return ins_is32 (hash, key, value);
}
/* Insert a keymap string key.
*
* If the given key exists, its value is returned.
* On error, -1 is returned.
* On success the value of the key inserted is returned */
int
ht_insert_keymap (GModule module, const char *key)
{
int value = -1;
khash_t (si32) * hash = get_hash (module, MTRC_KEYMAP);
if (!hash)
return -1;
if ((value = get_si32 (hash, key)) != -1)
return value;
return ins_si32_ai (hash, key);
}
/* Insert a datamap int key and string value.
*
* On error, -1 is returned.
* On success 0 is returned */
int
ht_insert_datamap (GModule module, int key, const char *value)
{
khash_t (is32) * hash = get_hash (module, MTRC_DATAMAP);
if (!hash)
return -1;
return ins_is32 (hash, key, value);
}
/* Insert a rootmap int key from the keymap store mapped to its string value.
*
* On error, -1 is returned.
* On success 0 is returned */
int
ht_insert_rootmap (GModule module, int key, const char *value)
{
khash_t (is32) * hash = get_hash (module, MTRC_ROOTMAP);
if (!hash)
return -1;
return ins_is32 (hash, key, value);
}
/* Insert a uniqmap string key.
*
* If the given key exists, 0 is returned.
* On error, -1 is returned.
* On success the value of the key inserted is returned */
int
ht_insert_uniqmap (GModule module, const char *key)
{
int value = -1;
khash_t (si32) * hash = get_hash (module, MTRC_UNIQMAP);
if (!hash)
return -1;
if ((value = get_si32 (hash, key)) != -1)
return 0;
return ins_si32_ai (hash, key);
}