[dbi] add database backend json

Add json based database backend.

TODO: add example json interface
This commit is contained in:
Alexander Couzens 2022-08-23 00:01:07 +02:00
parent c54fb59a87
commit 0d6ef1e8ac
7 changed files with 3918 additions and 2 deletions

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@ -26,6 +26,7 @@
#ifdef WITH_MONGOC
#include "mongo/mongo-private.h"
#endif
#include "json/json-private.h"
int __ogs_dbi_domain;
@ -33,6 +34,7 @@ static ogs_dbi_t *dbi_interfaces[] = {
#ifdef WITH_MONGOC
&ogs_dbi_mongo_interface,
#endif
&ogs_dbi_json_interface,
NULL,
};

3139
lib/dbi/external/cjson/cJSON.c vendored Normal file

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lib/dbi/external/cjson/cJSON.h vendored Normal file
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@ -0,0 +1,300 @@
/*
Copyright (c) 2009-2017 Dave Gamble and cJSON contributors
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.
*/
#ifndef cJSON__h
#define cJSON__h
#ifdef __cplusplus
extern "C"
{
#endif
#if !defined(__WINDOWS__) && (defined(WIN32) || defined(WIN64) || defined(_MSC_VER) || defined(_WIN32))
#define __WINDOWS__
#endif
#ifdef __WINDOWS__
/* When compiling for windows, we specify a specific calling convention to avoid issues where we are being called from a project with a different default calling convention. For windows you have 3 define options:
CJSON_HIDE_SYMBOLS - Define this in the case where you don't want to ever dllexport symbols
CJSON_EXPORT_SYMBOLS - Define this on library build when you want to dllexport symbols (default)
CJSON_IMPORT_SYMBOLS - Define this if you want to dllimport symbol
For *nix builds that support visibility attribute, you can define similar behavior by
setting default visibility to hidden by adding
-fvisibility=hidden (for gcc)
or
-xldscope=hidden (for sun cc)
to CFLAGS
then using the CJSON_API_VISIBILITY flag to "export" the same symbols the way CJSON_EXPORT_SYMBOLS does
*/
#define CJSON_CDECL __cdecl
#define CJSON_STDCALL __stdcall
/* export symbols by default, this is necessary for copy pasting the C and header file */
#if !defined(CJSON_HIDE_SYMBOLS) && !defined(CJSON_IMPORT_SYMBOLS) && !defined(CJSON_EXPORT_SYMBOLS)
#define CJSON_EXPORT_SYMBOLS
#endif
#if defined(CJSON_HIDE_SYMBOLS)
#define CJSON_PUBLIC(type) type CJSON_STDCALL
#elif defined(CJSON_EXPORT_SYMBOLS)
#define CJSON_PUBLIC(type) __declspec(dllexport) type CJSON_STDCALL
#elif defined(CJSON_IMPORT_SYMBOLS)
#define CJSON_PUBLIC(type) __declspec(dllimport) type CJSON_STDCALL
#endif
#else /* !__WINDOWS__ */
#define CJSON_CDECL
#define CJSON_STDCALL
#if (defined(__GNUC__) || defined(__SUNPRO_CC) || defined (__SUNPRO_C)) && defined(CJSON_API_VISIBILITY)
#define CJSON_PUBLIC(type) __attribute__((visibility("default"))) type
#else
#define CJSON_PUBLIC(type) type
#endif
#endif
/* project version */
#define CJSON_VERSION_MAJOR 1
#define CJSON_VERSION_MINOR 7
#define CJSON_VERSION_PATCH 15
#include <stddef.h>
/* cJSON Types: */
#define cJSON_Invalid (0)
#define cJSON_False (1 << 0)
#define cJSON_True (1 << 1)
#define cJSON_NULL (1 << 2)
#define cJSON_Number (1 << 3)
#define cJSON_String (1 << 4)
#define cJSON_Array (1 << 5)
#define cJSON_Object (1 << 6)
#define cJSON_Raw (1 << 7) /* raw json */
#define cJSON_IsReference 256
#define cJSON_StringIsConst 512
/* The cJSON structure: */
typedef struct cJSON
{
/* next/prev allow you to walk array/object chains. Alternatively, use GetArraySize/GetArrayItem/GetObjectItem */
struct cJSON *next;
struct cJSON *prev;
/* An array or object item will have a child pointer pointing to a chain of the items in the array/object. */
struct cJSON *child;
/* The type of the item, as above. */
int type;
/* The item's string, if type==cJSON_String and type == cJSON_Raw */
char *valuestring;
/* writing to valueint is DEPRECATED, use cJSON_SetNumberValue instead */
int valueint;
/* The item's number, if type==cJSON_Number */
double valuedouble;
/* The item's name string, if this item is the child of, or is in the list of subitems of an object. */
char *string;
} cJSON;
typedef struct cJSON_Hooks
{
/* malloc/free are CDECL on Windows regardless of the default calling convention of the compiler, so ensure the hooks allow passing those functions directly. */
void *(CJSON_CDECL *malloc_fn)(size_t sz);
void (CJSON_CDECL *free_fn)(void *ptr);
} cJSON_Hooks;
typedef int cJSON_bool;
/* Limits how deeply nested arrays/objects can be before cJSON rejects to parse them.
* This is to prevent stack overflows. */
#ifndef CJSON_NESTING_LIMIT
#define CJSON_NESTING_LIMIT 1000
#endif
/* returns the version of cJSON as a string */
CJSON_PUBLIC(const char*) cJSON_Version(void);
/* Supply malloc, realloc and free functions to cJSON */
CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks);
/* Memory Management: the caller is always responsible to free the results from all variants of cJSON_Parse (with cJSON_Delete) and cJSON_Print (with stdlib free, cJSON_Hooks.free_fn, or cJSON_free as appropriate). The exception is cJSON_PrintPreallocated, where the caller has full responsibility of the buffer. */
/* Supply a block of JSON, and this returns a cJSON object you can interrogate. */
CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value);
CJSON_PUBLIC(cJSON *) cJSON_ParseWithLength(const char *value, size_t buffer_length);
/* ParseWithOpts allows you to require (and check) that the JSON is null terminated, and to retrieve the pointer to the final byte parsed. */
/* If you supply a ptr in return_parse_end and parsing fails, then return_parse_end will contain a pointer to the error so will match cJSON_GetErrorPtr(). */
CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated);
CJSON_PUBLIC(cJSON *) cJSON_ParseWithLengthOpts(const char *value, size_t buffer_length, const char **return_parse_end, cJSON_bool require_null_terminated);
/* Render a cJSON entity to text for transfer/storage. */
CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item);
/* Render a cJSON entity to text for transfer/storage without any formatting. */
CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item);
/* Render a cJSON entity to text using a buffered strategy. prebuffer is a guess at the final size. guessing well reduces reallocation. fmt=0 gives unformatted, =1 gives formatted */
CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt);
/* Render a cJSON entity to text using a buffer already allocated in memory with given length. Returns 1 on success and 0 on failure. */
/* NOTE: cJSON is not always 100% accurate in estimating how much memory it will use, so to be safe allocate 5 bytes more than you actually need */
CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buffer, const int length, const cJSON_bool format);
/* Delete a cJSON entity and all subentities. */
CJSON_PUBLIC(void) cJSON_Delete(cJSON *item);
/* Returns the number of items in an array (or object). */
CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array);
/* Retrieve item number "index" from array "array". Returns NULL if unsuccessful. */
CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index);
/* Get item "string" from object. Case insensitive. */
CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON * const object, const char * const string);
CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string);
CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string);
/* For analysing failed parses. This returns a pointer to the parse error. You'll probably need to look a few chars back to make sense of it. Defined when cJSON_Parse() returns 0. 0 when cJSON_Parse() succeeds. */
CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void);
/* Check item type and return its value */
CJSON_PUBLIC(char *) cJSON_GetStringValue(const cJSON * const item);
CJSON_PUBLIC(double) cJSON_GetNumberValue(const cJSON * const item);
/* These functions check the type of an item */
CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON * const item);
/* These calls create a cJSON item of the appropriate type. */
CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean);
CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num);
CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string);
/* raw json */
CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw);
CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void);
/* Create a string where valuestring references a string so
* it will not be freed by cJSON_Delete */
CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string);
/* Create an object/array that only references it's elements so
* they will not be freed by cJSON_Delete */
CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child);
CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child);
/* These utilities create an Array of count items.
* The parameter count cannot be greater than the number of elements in the number array, otherwise array access will be out of bounds.*/
CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count);
CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count);
CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count);
CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char *const *strings, int count);
/* Append item to the specified array/object. */
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToArray(cJSON *array, cJSON *item);
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item);
/* Use this when string is definitely const (i.e. a literal, or as good as), and will definitely survive the cJSON object.
* WARNING: When this function was used, make sure to always check that (item->type & cJSON_StringIsConst) is zero before
* writing to `item->string` */
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item);
/* Append reference to item to the specified array/object. Use this when you want to add an existing cJSON to a new cJSON, but don't want to corrupt your existing cJSON. */
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item);
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item);
/* Remove/Detach items from Arrays/Objects. */
CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const item);
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which);
CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which);
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string);
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string);
CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string);
CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string);
/* Update array items. */
CJSON_PUBLIC(cJSON_bool) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem); /* Shifts pre-existing items to the right. */
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement);
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem);
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem);
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object,const char *string,cJSON *newitem);
/* Duplicate a cJSON item */
CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse);
/* Duplicate will create a new, identical cJSON item to the one you pass, in new memory that will
* need to be released. With recurse!=0, it will duplicate any children connected to the item.
* The item->next and ->prev pointers are always zero on return from Duplicate. */
/* Recursively compare two cJSON items for equality. If either a or b is NULL or invalid, they will be considered unequal.
* case_sensitive determines if object keys are treated case sensitive (1) or case insensitive (0) */
CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON * const a, const cJSON * const b, const cJSON_bool case_sensitive);
/* Minify a strings, remove blank characters(such as ' ', '\t', '\r', '\n') from strings.
* The input pointer json cannot point to a read-only address area, such as a string constant,
* but should point to a readable and writable address area. */
CJSON_PUBLIC(void) cJSON_Minify(char *json);
/* Helper functions for creating and adding items to an object at the same time.
* They return the added item or NULL on failure. */
CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean);
CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number);
CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string);
CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw);
CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * const name);
/* When assigning an integer value, it needs to be propagated to valuedouble too. */
#define cJSON_SetIntValue(object, number) ((object) ? (object)->valueint = (object)->valuedouble = (number) : (number))
/* helper for the cJSON_SetNumberValue macro */
CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number);
#define cJSON_SetNumberValue(object, number) ((object != NULL) ? cJSON_SetNumberHelper(object, (double)number) : (number))
/* Change the valuestring of a cJSON_String object, only takes effect when type of object is cJSON_String */
CJSON_PUBLIC(char*) cJSON_SetValuestring(cJSON *object, const char *valuestring);
/* If the object is not a boolean type this does nothing and returns cJSON_Invalid else it returns the new type*/
#define cJSON_SetBoolValue(object, boolValue) ( \
(object != NULL && ((object)->type & (cJSON_False|cJSON_True))) ? \
(object)->type=((object)->type &(~(cJSON_False|cJSON_True)))|((boolValue)?cJSON_True:cJSON_False) : \
cJSON_Invalid\
)
/* Macro for iterating over an array or object */
#define cJSON_ArrayForEach(element, array) for(element = (array != NULL) ? (array)->child : NULL; element != NULL; element = element->next)
/* malloc/free objects using the malloc/free functions that have been set with cJSON_InitHooks */
CJSON_PUBLIC(void *) cJSON_malloc(size_t size);
CJSON_PUBLIC(void) cJSON_free(void *object);
#ifdef __cplusplus
}
#endif
#endif

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@ -0,0 +1,40 @@
/*
* Copyright (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
* Author: Alexander Couzens <lynxis@fe80.eu>
*
* This file is part of Open5GS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#if !defined(OGS_DBI_INSIDE) && !defined(OGS_DBI_COMPILATION)
#error "This header cannot be included directly."
#endif
#ifndef OGS_DBI_JSON_PRIVATE_H
#define OGS_DBI_JSON_PRIVATE_H
#ifdef __cplusplus
extern "C" {
#endif
#include "dbi-private.h"
extern ogs_dbi_t ogs_dbi_json_interface;
#ifdef __cplusplus
}
#endif
#endif /* OGS_DBI_JSON_PRIVATE_H */

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lib/dbi/json/json.c Normal file
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@ -0,0 +1,418 @@
/*
* Copyright (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
* Author: Alexander Couzens <lynxis@fe80.eu>
*
* This file is part of Open5GS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "ogs-dbi.h"
#include "json-private.h"
#include <cjson/cJSON.h>
#define MAX_DB_PROFILES 256
#define MAX_DB_APNS 10
typedef struct ogs_json_apn_profile_s {
int32_t id;
ogs_qos_t qos;
bool valid;
} ogs_json_apn_profile_t;
typedef struct ogs_json_apn_s {
char *apn;
ogs_json_apn_profile_t profiles[MAX_DB_PROFILES];
ogs_bitrate_t ambr; /* APN-AMBR */
bool valid;
} ogs_json_apn_t;
ogs_json_apn_t g_apns[MAX_DB_APNS];
static ogs_json_apn_profile_t *ogs_dbi_static_alloc_db_entry(ogs_json_apn_t *db_apn)
{
int i = 0;
ogs_assert(db_apn);
ogs_json_apn_profile_t *entry;
for (i = 0; i < MAX_DB_PROFILES; i++) {
entry = &db_apn->profiles[i];
if (entry->valid)
continue;
return entry;
}
return NULL;
}
static ogs_json_apn_profile_t *ogs_dbi_static_get_apn_profile(ogs_json_apn_t *db_apn, int profile_id)
{
int i = 0;
ogs_assert(db_apn);
for (i = 0; i < MAX_DB_PROFILES; i++) {
ogs_json_apn_profile_t *entry = &db_apn->profiles[i];
if (!entry->valid)
continue;
if (entry->id != profile_id)
continue;
return entry;
}
return NULL;
}
static ogs_json_apn_t *ogs_dbi_static_get_apn(const char *apn)
{
int i;
for (i = 0; i < MAX_DB_APNS; i++) {
ogs_json_apn_t *entry = &g_apns[i];
if (!entry->valid)
continue;
if (!ogs_strcasecmp(entry->apn, apn))
return entry;
}
return NULL;
}
static ogs_json_apn_t *ogs_dbi_static_alloc_apn(void)
{
int i = 0;
ogs_json_apn_t *apn;
for (i = 0; i < MAX_DB_APNS; i++) {
apn = &g_apns[i];
if (apn->valid)
continue;
return apn;
}
return NULL;
}
static int cjson_get_uint64_t(const cJSON * const top, const char *item_chr, int required, uint64_t min, uint64_t max, uint64_t *value)
{
uint64_t number;
ogs_assert(value);
cJSON *item = cJSON_GetObjectItem(top, item_chr);
if (!item) {
if (!required)
return 0;
ogs_error("Could not find mandatory field %s\n", item_chr);
return -ENOENT;
}
if (!cJSON_IsNumber(item)) {
ogs_error("Invalid value for %s. It must be a number!\n", item_chr);
return -EINVAL;
}
number = cJSON_GetNumberValue(item);
if (!(min <= number && number <= max)) {
ogs_error("Invalid value for %s: %ld. It must be %ld <= x <= %ld\n", item_chr, number, min, max);
return -ERANGE;
}
*value = number;
return 0;
}
static int cjson_get_int(const cJSON * const top, const char *item_chr, int required, int min, int max, int *value)
{
int number;
ogs_assert(value);
cJSON *item = cJSON_GetObjectItem(top, item_chr);
if (!item) {
if (!required)
return 0;
ogs_error("Could not find mandatory field %s\n", item_chr);
return -ENOENT;
}
if (!cJSON_IsNumber(item)) {
ogs_error("Invalid value for %s. It must be a number!\n", item_chr);
return -EINVAL;
}
number = cJSON_GetNumberValue(item);
if (!(min <= number && number <= max)) {
ogs_error("Invalid value for %s: %d. It must be %d <= x <= %d\n", item_chr, number, min, max);
return -ERANGE;
}
*value = number;
return 0;
}
static int get_bandwidth(cJSON *top, const char *mbr, ogs_bitrate_t *bitrate)
{
int ret;
ogs_assert(mbr);
ogs_assert(top);
ogs_assert(bitrate);
cJSON *obj = cJSON_GetObjectItem(top, mbr);
if (!obj)
return 0;
if (!cJSON_IsObject(obj)) {
ogs_error("%s has the wrong type. It is not an object!\n", mbr);
return -EINVAL;
}
/* TODO: this will break close to 2 gbit */
ret = cjson_get_uint64_t(obj, "up", 0, 0, UINT64_MAX, &bitrate->uplink);
if (ret)
return ret;
ret = cjson_get_uint64_t(obj, "down", 0, 0, UINT32_MAX, &bitrate->downlink);
if (ret)
return ret;
return 0;
}
int ogs_dbi_json_init(const char *filepath, const char *apn)
{
int ret = 0;
long filesize = -1;
ssize_t mem_read;
ogs_json_apn_t *db_apn = ogs_dbi_static_get_apn(apn);
FILE *filefp;
char *buf = NULL;
int profile_id;
ogs_dbi_select_interface("json");
if (db_apn) {
return -EALREADY;
}
filefp = fopen(filepath, "r");
if (!filefp) {
return -ENOENT;
}
if (fseek(filefp, 0L, SEEK_END) < 0) {
ret = -ENOENT;
goto fail;
}
filesize = ftell(filefp);
if (filesize < 0) {
ret = -ENOENT;
goto fail;
}
buf = ogs_malloc(filesize);
if (!buf) {
ret = -ENOMEM;
goto fail;
}
if (fseek(filefp, 0L, SEEK_SET) < 0) {
ret = -ENOENT;
goto fail;
}
mem_read = fread(buf, filesize, 1, filefp);
if (mem_read != 1 && !feof(filefp)) {
ret = -1;
goto fail;
}
cJSON *profiles = cJSON_ParseWithLength(buf, filesize);
if (!profiles) {
const char *error_ptr = cJSON_GetErrorPtr();
if (error_ptr != NULL)
{
ogs_error("Error before: %s\n", error_ptr);
}
ret = -1;
goto fail;
}
if (!cJSON_IsArray(profiles)) {
ogs_error("Profile root object must be an array");
ret = -2;
goto fail;
}
db_apn = ogs_dbi_static_alloc_apn();
if (!db_apn) {
ogs_error("Too many APNs\n");
ret = -ENOENT;
goto fail;
}
memset(db_apn, '\0', sizeof(*db_apn));
db_apn->apn = ogs_strdup(apn);
db_apn->valid = 1;
cJSON *profile;
cJSON_ArrayForEach(profile, profiles) {
int number;
ogs_json_apn_profile_t *entry;
ret = cjson_get_int(profile, "id", 1, 0, 65535, &profile_id);
if (ret)
goto fail;
entry = ogs_dbi_static_get_apn_profile(db_apn, profile_id);
if (entry) {
ogs_error("Doublicated profile with id %d\n", profile_id);
ret = -1;
goto fail;
}
entry = ogs_dbi_static_alloc_db_entry(db_apn);
if (!entry) {
ogs_error("Tooo many db entries for apn %s\n", apn);
ret = -1;
goto fail;
}
ogs_info("Loading json profile for apn: \"%s\" / charging id \"%d\"", apn, profile_id);
entry->id = profile_id;
ret = cjson_get_int(profile, "qci", 1, 0, 16, &number);
if (ret)
goto fail;
entry->qos.index = number & 0xff;
ret = get_bandwidth(profile, "ambr", &entry->qos.mbr);
if (ret)
goto fail;
ret = get_bandwidth(profile, "gbr", &entry->qos.gbr);
if (ret)
goto fail;
/* TODO: check boundary check for fields */
ret = cjson_get_int(profile, "priority", 1, 0, 15, &number);
if (ret)
goto fail;
entry->qos.arp.priority_level = number & 0xff;
ret = cjson_get_int(profile, "pre_emption_capability", 1, 0, 1, &number);
if (ret)
goto fail;
if (number)
entry->qos.arp.pre_emption_capability = OGS_5GC_PRE_EMPTION_ENABLED;
else
entry->qos.arp.pre_emption_capability = OGS_5GC_PRE_EMPTION_DISABLED;
ret = cjson_get_int(profile, "pre_emption_vulnerability", 1, 0, 1, &number);
if (ret)
goto fail;
if (number)
entry->qos.arp.pre_emption_vulnerability = OGS_5GC_PRE_EMPTION_ENABLED;
else
entry->qos.arp.pre_emption_vulnerability = OGS_5GC_PRE_EMPTION_DISABLED;
entry->valid = true;
}
if (profiles)
cJSON_Delete(profiles);
if (buf)
ogs_free(buf);
return 0;
fail:
if (db_apn->apn)
ogs_free(db_apn->apn);
if (profiles)
cJSON_Delete(profiles);
if (buf)
ogs_free(buf);
fclose(filefp);
return ret;
}
static int json_session_data(char *supi, ogs_s_nssai_t *s_nssai, char *dnn, ogs_session_data_t *session_data)
{
ogs_session_t *session = &session_data->session;
ogs_json_apn_profile_t *profile;
ogs_json_apn_t *db_apn = ogs_dbi_static_get_apn(dnn);
int charging_char = -1;
if (!db_apn)
db_apn = ogs_dbi_static_get_apn("*");
if (!db_apn) {
ogs_error("Couldn't find a profile for dnn (%s)", dnn);
return OGS_ERROR;
}
profile = ogs_dbi_static_get_apn_profile(db_apn, charging_char);
/* try default profile */
if (!profile && charging_char != -1)
profile = ogs_dbi_static_get_apn_profile(db_apn, -1);
if (!profile) {
ogs_error("Couldn't find a profile for dnn (%s) with charging characteristic %d", dnn, charging_char);
return OGS_ERROR;
}
session->name = ogs_strndup("json_profile", strlen("json_profile"));
/* FIXME: the ambr shouldn't be qos.mbr, instead it should be from apn.ambr, but neither PCRF nor PCEF support it this way */
session->ambr = profile->qos.mbr;
session->qos = profile->qos;
return OGS_OK;
}
static void json_final(void) {
int i;
for (i = 0; i < MAX_DB_APNS; i++) {
ogs_json_apn_t *db_apn = &g_apns[i];
if (!db_apn->valid)
continue;
db_apn->valid = 0;
if (db_apn->apn) {
ogs_free(db_apn->apn);
db_apn->apn = NULL;
}
}
}
ogs_dbi_t ogs_dbi_json_interface = {
.name = "json",
/* session */
.session_data = json_session_data,
.final = json_final,
};

View File

@ -31,6 +31,13 @@ mongo_sources = files('''
mongo/ims.c
'''.split())
json_sources = files('''
json/json.c
external/cjson/cJSON.c
'''.split())
libdbi_sources += [json_sources]
cjson_inc = include_directories('./external/')
libmongoc_dep = dependency('libmongoc-1.0', required: true)
if libmongoc_dep.found()
libdbi_conf.set('WITH_MONGOC', 1)
@ -41,11 +48,18 @@ configure_file(output : 'dbi-config-private.h', configuration : libdbi_conf)
libdbi_inc = include_directories('.')
dbi_cc_flags = ['-DOGS_DBI_COMPILATION']
if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
dbi_cc_flags += cc.get_supported_arguments([
'-Wno-float-equal',
])
endif
libdbi = library('ogsdbi',
sources : libdbi_sources,
version : libogslib_version,
c_args : '-DOGS_DBI_COMPILATION',
include_directories : [libdbi_inc, libinc],
c_args : dbi_cc_flags,
include_directories : [libdbi_inc, libinc, cjson_inc],
dependencies : [libcrypt_dep, libmongoc_dep],
install : true)

View File

@ -39,6 +39,9 @@ extern "C" {
extern int __ogs_dbi_domain;
/* can be called multiple times for every apn */
int ogs_dbi_json_init(const char *filepath, const char *apn);
#undef OGS_LOG_DOMAIN
#define OGS_LOG_DOMAIN __ogs_dbi_domain