Mirror of the official OpenWrt uci repository https://git.openwrt.org/project/uci
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/*
* blob.c - uci <-> blobmsg conversion layer
* Copyright (C) 2012-2013 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* 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 Lesser General Public License for more details.
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <libubox/blobmsg.h>
#include "uci.h"
#include "uci_blob.h"
static bool
uci_attr_to_blob(struct blob_buf *b, const char *str,
const char *name, enum blobmsg_type type)
{
char *err;
int intval;
long long llval;
switch (type) {
case BLOBMSG_TYPE_STRING:
blobmsg_add_string(b, name, str);
break;
case BLOBMSG_TYPE_BOOL:
if (!strcmp(str, "true") || !strcmp(str, "1"))
intval = 1;
else if (!strcmp(str, "false") || !strcmp(str, "0"))
intval = 0;
else
return false;
blobmsg_add_u8(b, name, intval);
break;
case BLOBMSG_TYPE_INT32:
intval = strtol(str, &err, 0);
if (*err)
return false;
blobmsg_add_u32(b, name, intval);
break;
case BLOBMSG_TYPE_INT64:
llval = strtoll(str, &err, 0);
if (*err)
return false;
blobmsg_add_u64(b, name, llval);
break;
default:
return false;
}
return true;
}
static void
uci_array_to_blob(struct blob_buf *b, struct uci_option *o,
enum blobmsg_type type)
{
struct uci_element *e;
char *str, *next, *word;
if (o->type == UCI_TYPE_LIST) {
uci_foreach_element(&o->v.list, e) {
uci_attr_to_blob(b, e->name, NULL, type);
}
return;
}
str = strdup(o->v.string);
next = str;
while ((word = strsep(&next, " \t")) != NULL) {
if (!*word)
continue;
uci_attr_to_blob(b, word, NULL, type);
}
free(str);
}
static int
__uci_element_to_blob(struct blob_buf *b, struct uci_element *e,
const struct uci_blob_param_list *p)
{
const struct blobmsg_policy *attr = NULL;
struct uci_option *o = uci_to_option(e);
unsigned int types = 0;
void *array;
int i, ret = 0;
for (i = 0; i < p->n_params; i++) {
attr = &p->params[i];
if (strcmp(attr->name, e->name) != 0)
continue;
if (attr->type > BLOBMSG_TYPE_LAST)
continue;
if (types & (1 << attr->type))
continue;
types |= 1 << attr->type;
if (attr->type == BLOBMSG_TYPE_ARRAY) {
int element_type = 0;
if (p->info)
element_type = p->info[i].type;
if (!element_type)
element_type = BLOBMSG_TYPE_STRING;
array = blobmsg_open_array(b, attr->name);
uci_array_to_blob(b, o, element_type);
blobmsg_close_array(b, array);
ret++;
continue;
}
if (o->type == UCI_TYPE_LIST)
continue;
ret += uci_attr_to_blob(b, o->v.string, attr->name, attr->type);
}
return ret;
}
static int
__uci_to_blob(struct blob_buf *b, struct uci_section *s,
const struct uci_blob_param_list *p)
{
struct uci_element *e;
int ret = 0;
uci_foreach_element(&s->options, e)
ret += __uci_element_to_blob(b, e, p);
return ret;
}
int
uci_to_blob(struct blob_buf *b, struct uci_section *s,
const struct uci_blob_param_list *p)
{
int ret = 0;
int i;
ret += __uci_to_blob(b, s, p);
for (i = 0; i < p->n_next; i++)
ret += uci_to_blob(b, s, p->next[i]);
return ret;
}
bool
uci_blob_diff(struct blob_attr **tb1, struct blob_attr **tb2,
const struct uci_blob_param_list *config, unsigned long *diff)
{
bool ret = false;
int i;
for (i = 0; i < config->n_params; i++) {
if (!tb1[i] && !tb2[i])
continue;
if (!!tb1[i] != !!tb2[i])
goto mark;
if (blob_len(tb1[i]) != blob_len(tb2[i]))
goto mark;
if (memcmp(tb1[i], tb2[i], blob_raw_len(tb1[i])) != 0)
goto mark;
continue;
mark:
ret = true;
if (diff)
uci_bitfield_set(diff, i);
else
return ret;
}
return ret;
}
static bool
__uci_blob_check_equal(struct blob_attr *c1, struct blob_attr *c2,
const struct uci_blob_param_list *config)
{
struct blob_attr **tb1, **tb2;
if (!!c1 ^ !!c2)
return false;
if (!c1 && !c2)
return true;
tb1 = alloca(config->n_params * sizeof(struct blob_attr *));
blobmsg_parse(config->params, config->n_params, tb1,
blob_data(c1), blob_len(c1));
tb2 = alloca(config->n_params * sizeof(struct blob_attr *));
blobmsg_parse(config->params, config->n_params, tb2,
blob_data(c2), blob_len(c2));
return !uci_blob_diff(tb1, tb2, config, NULL);
}
bool
uci_blob_check_equal(struct blob_attr *c1, struct blob_attr *c2,
const struct uci_blob_param_list *config)
{
int i;
if (!__uci_blob_check_equal(c1, c2, config))
return false;
for (i = 0; i < config->n_next; i++) {
if (!__uci_blob_check_equal(c1, c2, config->next[i]))
return false;
}
return true;
}