/*
- * blobmsg - library for generating/parsing structured blob messages
+ * Copyright (C) 2010-2012 Felix Fietkau <nbd@openwrt.org>
*
- * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
*
- * 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 General Public License for more details.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-
#include "blobmsg.h"
-struct strbuf {
- int len;
- int pos;
- char *buf;
-
- blobmsg_json_format_t custom_format;
- void *priv;
-};
-
-static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
-{
- if (len <= 0)
- return true;
-
- if (s->pos + len >= s->len) {
- s->len += 16;
- s->buf = realloc(s->buf, s->len);
- if (!s->buf)
- return false;
- }
- memcpy(s->buf + s->pos, c, len);
- s->pos += len;
- return true;
-}
-
-static void blobmsg_format_string(struct strbuf *s, const char *str)
-{
- const char *p, *last = str, *end = str + strlen(str);
- char buf[8] = "\\u00";
-
- blobmsg_puts(s, "\"", 1);
- for (p = str; *p; p++) {
- char escape = '\0';
- int len;
-
- switch(*p) {
- case '\b':
- escape = 'b';
- break;
- case '\n':
- escape = 'n';
- break;
- case '\t':
- escape = 't';
- break;
- case '\r':
- escape = 'r';
- break;
- case '"':
- case '\\':
- case '/':
- escape = *p;
- break;
- default:
- if (*p < ' ')
- escape = 'u';
- break;
- }
-
- if (!escape)
- continue;
-
- if (p > last)
- blobmsg_puts(s, last, p - last);
- last = p + 1;
- buf[1] = escape;
-
- if (escape == 'u') {
- sprintf(buf + 4, "%02x", (unsigned char) *p);
- len = 4;
- } else {
- len = 2;
- }
- blobmsg_puts(s, buf, len);
- }
-
- blobmsg_puts(s, last, end - last);
- blobmsg_puts(s, "\"", 1);
-}
-
-static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array);
-
-static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, bool array, bool head)
-{
- const char *data_str;
- char buf[32];
- void *data;
- int len;
-
- if (!array && blobmsg_name(attr)[0]) {
- blobmsg_format_string(s, blobmsg_name(attr));
- blobmsg_puts(s, ":", 1);
- }
- if (head) {
- data = blob_data(attr);
- len = blob_len(attr);
- } else {
- data = blobmsg_data(attr);
- len = blobmsg_data_len(attr);
-
- if (s->custom_format) {
- data_str = s->custom_format(s->priv, attr);
- if (data_str)
- goto out;
- }
- }
-
- data_str = buf;
- switch(blob_id(attr)) {
- case BLOBMSG_TYPE_INT8:
- sprintf(buf, "%d", *(uint8_t *)data);
- break;
- case BLOBMSG_TYPE_INT16:
- sprintf(buf, "%d", *(uint16_t *)data);
- break;
- case BLOBMSG_TYPE_INT32:
- sprintf(buf, "%d", *(uint32_t *)data);
- break;
- case BLOBMSG_TYPE_INT64:
- sprintf(buf, "%lld", *(uint64_t *)data);
- break;
- case BLOBMSG_TYPE_STRING:
- blobmsg_format_string(s, data);
- return;
- case BLOBMSG_TYPE_ARRAY:
- blobmsg_format_json_list(s, data, len, true);
- return;
- case BLOBMSG_TYPE_TABLE:
- blobmsg_format_json_list(s, data, len, false);
- return;
- }
-
-out:
- blobmsg_puts(s, data_str, strlen(data_str));
-}
-
-static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array)
-{
- struct blob_attr *pos;
- bool first = true;
- int rem = len;
-
- blobmsg_puts(s, (array ? "[ " : "{ "), 2);
- __blob_for_each_attr(pos, attr, rem) {
- if (!first)
- blobmsg_puts(s, ", ", 2);
-
- blobmsg_format_element(s, pos, array, false);
- first = false;
- }
- blobmsg_puts(s, (array ? " ]" : " }"), 2);
-}
-
-char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv)
-{
- struct strbuf s;
-
- s.len = blob_len(attr);
- s.buf = malloc(s.len);
- s.pos = 0;
- s.custom_format = cb;
- s.priv = priv;
-
- if (list)
- blobmsg_format_json_list(&s, blob_data(attr), blob_len(attr), false);
- else
- blobmsg_format_element(&s, attr, false, false);
-
- if (!s.len)
- return NULL;
-
- s.buf = realloc(s.buf, s.pos + 1);
- return s.buf;
-}
-
static const int blob_type[__BLOBMSG_TYPE_LAST] = {
[BLOBMSG_TYPE_INT8] = BLOB_ATTR_INT8,
[BLOBMSG_TYPE_INT16] = BLOB_ATTR_INT16,
[BLOBMSG_TYPE_INT32] = BLOB_ATTR_INT32,
[BLOBMSG_TYPE_INT64] = BLOB_ATTR_INT64,
[BLOBMSG_TYPE_STRING] = BLOB_ATTR_STRING,
+ [BLOBMSG_TYPE_UNSPEC] = BLOB_ATTR_BINARY,
};
+static uint16_t
+blobmsg_namelen(const struct blobmsg_hdr *hdr)
+{
+ return be16_to_cpu(hdr->namelen);
+}
+
bool blobmsg_check_attr(const struct blob_attr *attr, bool name)
{
const struct blobmsg_hdr *hdr;
if (!hdr->namelen && name)
return false;
- if (hdr->namelen > blob_len(attr) - sizeof(struct blobmsg_hdr))
+ if (blobmsg_namelen(hdr) > blob_len(attr) - sizeof(struct blobmsg_hdr))
return false;
- if (hdr->name[hdr->namelen] != 0)
+ if (hdr->name[blobmsg_namelen(hdr)] != 0)
return false;
id = blob_id(attr);
len = blobmsg_data_len(attr);
data = blobmsg_data(attr);
- if (!id || id > BLOBMSG_TYPE_LAST)
+ if (id > BLOBMSG_TYPE_LAST)
return false;
if (!blob_type[id])
return blob_check_type(data, len, blob_type[id]);
}
+int blobmsg_check_array(const struct blob_attr *attr, int type)
+{
+ struct blob_attr *cur;
+ bool name;
+ int rem;
+ int size = 0;
+
+ switch (blobmsg_type(attr)) {
+ case BLOBMSG_TYPE_TABLE:
+ name = true;
+ break;
+ case BLOBMSG_TYPE_ARRAY:
+ name = false;
+ break;
+ default:
+ return -1;
+ }
+
+ blobmsg_for_each_attr(cur, attr, rem) {
+ if (type != BLOBMSG_TYPE_UNSPEC && blobmsg_type(cur) != type)
+ return -1;
+
+ if (!blobmsg_check_attr(cur, name))
+ return -1;
+
+ size++;
+ }
+
+ return size;
+}
+
+bool blobmsg_check_attr_list(const struct blob_attr *attr, int type)
+{
+ return blobmsg_check_array(attr, type) >= 0;
+}
+
+int blobmsg_parse_array(const struct blobmsg_policy *policy, int policy_len,
+ struct blob_attr **tb, void *data, unsigned int len)
+{
+ struct blob_attr *attr;
+ int i = 0;
+
+ memset(tb, 0, policy_len * sizeof(*tb));
+ __blob_for_each_attr(attr, data, len) {
+ if (policy[i].type != BLOBMSG_TYPE_UNSPEC &&
+ blob_id(attr) != policy[i].type)
+ continue;
+
+ if (!blobmsg_check_attr(attr, false))
+ return -1;
+
+ if (tb[i])
+ continue;
+
+ tb[i++] = attr;
+ if (i == policy_len)
+ break;
+ }
+
+ return 0;
+}
+
+
int blobmsg_parse(const struct blobmsg_policy *policy, int policy_len,
- struct blob_attr **tb, void *data, int len)
+ struct blob_attr **tb, void *data, unsigned int len)
{
struct blobmsg_hdr *hdr;
struct blob_attr *attr;
blob_id(attr) != policy[i].type)
continue;
- if (hdr->namelen != pslen[i])
+ if (blobmsg_namelen(hdr) != pslen[i])
continue;
if (!blobmsg_check_attr(attr, true))
return -1;
if (tb[i])
- return -1;
+ continue;
if (strcmp(policy[i].name, (char *) hdr->name) != 0)
continue;
struct blob_attr *attr;
struct blobmsg_hdr *hdr;
int attrlen, namelen;
+ char *pad_start, *pad_end;
if (!name)
name = "";
if (!attr)
return NULL;
+ attr->id_len |= be32_to_cpu(BLOB_ATTR_EXTENDED);
hdr = blob_data(attr);
- hdr->namelen = namelen;
+ hdr->namelen = cpu_to_be16(namelen);
strcpy((char *) hdr->name, (const char *)name);
- *data = blobmsg_data(attr);
+ pad_end = *data = blobmsg_data(attr);
+ pad_start = (char *) &hdr->name[namelen];
+ if (pad_start < pad_end)
+ memset(pad_start, 0, pad_end - pad_start);
return attr;
}
static inline int
attr_to_offset(struct blob_buf *buf, struct blob_attr *attr)
{
- return (char *)attr - (char *) buf->buf;
+ return (char *)attr - (char *) buf->buf + BLOB_COOKIE;
}
void *
blobmsg_open_nested(struct blob_buf *buf, const char *name, bool array)
{
- struct blob_attr *head = buf->head;
+ struct blob_attr *head;
int type = array ? BLOBMSG_TYPE_ARRAY : BLOBMSG_TYPE_TABLE;
unsigned long offset = attr_to_offset(buf, buf->head);
void *data;
name = "";
head = blobmsg_new(buf, type, name, 0, &data);
+ if (!head)
+ return NULL;
blob_set_raw_len(buf->head, blob_pad_len(buf->head) - blobmsg_hdrlen(strlen(name)));
buf->head = head;
return (void *)offset;
}
+void
+blobmsg_vprintf(struct blob_buf *buf, const char *name, const char *format, va_list arg)
+{
+ va_list arg2;
+ char cbuf;
+ int len;
+
+ va_copy(arg2, arg);
+ len = vsnprintf(&cbuf, sizeof(cbuf), format, arg2);
+ va_end(arg2);
+
+ vsprintf(blobmsg_alloc_string_buffer(buf, name, len + 1), format, arg);
+ blobmsg_add_string_buffer(buf);
+}
+
+void
+blobmsg_printf(struct blob_buf *buf, const char *name, const char *format, ...)
+{
+ va_list ap;
+
+ va_start(ap, format);
+ blobmsg_vprintf(buf, name, format, ap);
+ va_end(ap);
+}
+
void *
-blobmsg_alloc_string_buffer(struct blob_buf *buf, const char *name, int maxlen)
+blobmsg_alloc_string_buffer(struct blob_buf *buf, const char *name, unsigned int maxlen)
{
struct blob_attr *attr;
void *data_dest;
return data_dest;
}
+void *
+blobmsg_realloc_string_buffer(struct blob_buf *buf, unsigned int maxlen)
+{
+ struct blob_attr *attr = blob_next(buf->head);
+ int offset = attr_to_offset(buf, blob_next(buf->head)) + blob_pad_len(attr) - BLOB_COOKIE;
+ int required = maxlen - (buf->buflen - offset);
+
+ if (required <= 0)
+ goto out;
+
+ blob_buf_grow(buf, required);
+ attr = blob_next(buf->head);
+
+out:
+ return blobmsg_data(attr);
+}
+
void
blobmsg_add_string_buffer(struct blob_buf *buf)
{
attrlen = blob_raw_len(attr) + len;
blob_set_raw_len(attr, attrlen);
+ blob_fill_pad(attr);
+
blob_set_raw_len(buf->head, blob_raw_len(buf->head) + blob_pad_len(attr));
}
int
blobmsg_add_field(struct blob_buf *buf, int type, const char *name,
- const void *data, int len)
+ const void *data, unsigned int len)
{
struct blob_attr *attr;
void *data_dest;
- if (type == BLOBMSG_TYPE_ARRAY ||
- type == BLOBMSG_TYPE_TABLE)
- return -1;
-
attr = blobmsg_new(buf, type, name, len, &data_dest);
if (!attr)
return -1;
projects / project / libubox.git / blobdiff