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Author SHA1 Message Date
Petr Štetiar
86f6a5b8d1 blobmsg: reuse blobmsg_namelen in blobmsg_data 
Move blobmsg_namelen into header file so it's possible to reuse it in
blobmsg_data.

Signed-off-by: Petr Štetiar <ynezz@true.cz>
 2019-12-25 10:31:58 +01:00
Tobias Schramm
b0e21553ae blobmsg: add _len variants for all attribute checking methods 
Introduce _len variants of blobmsg attribute checking functions which
aims to provide safer implementation as those functions should limit all
memory accesses performed on the blob to the range [attr, attr + len]
(upper bound non inclusive) and thus should be suited for checking of
untrusted blob attributes.

While at it add some comments in order to make it clear.

Signed-off-by: Tobias Schramm <tobleminer@gmail.com>
[_safe -> _len, blobmsg_check_array_len fix, commit subject/desc facelift]
Signed-off-by: Petr Štetiar <ynezz@true.cz>
 2019-12-25 10:31:58 +01:00
Tobias Schramm
cd3059796a Replace use of blobmsg_check_attr by blobmsg_check_attr_len 
blobmsg_check_attr_len adds a length limit specifying the max offset
from attr that can be read safely.

Signed-off-by: Tobias Schramm <tobleminer@gmail.com>
[rebased and reworked, line wrapped commit message, _safe -> _len]
Signed-off-by: Petr Štetiar <ynezz@true.cz>
 2019-12-25 10:31:58 +01:00
Tobias Schramm
143303149c Ensure blob_attr length check does not perform out of bounds reads 
Before there might have been as little as one single byte left which
would result in 3 bytes of blob_attr->id_len being out of bounds.

Acked-by: Yousong Zhou <yszhou4tech@gmail.com>
Signed-off-by: Tobias Schramm <tobleminer@gmail.com>
[line wrapped < 72 chars]
Signed-off-by: Petr Štetiar <ynezz@true.cz>
 2019-12-25 10:31:58 +01:00
Petr Štetiar
4dfd24ed88 blobmsg: make blobmsg_len and blobmsg_data_len return unsigned value 
One usually doesn't guard against negative length values in the code.

Signed-off-by: Petr Štetiar <ynezz@true.cz>
 2019-12-25 10:31:58 +01:00
John Crispin
c83a84afbe fix segfault when passed blobmsg attr is NULL 
Signed-off-by: John Crispin <john@phrozen.org>
 2018-07-25 10:30:05 +02:00
André Gaul
7f671b1e68 blobmsg: add support for double 
This adds support for double floating point type to make it more JSON
compatible. For type checking it also adds a stub BLOB_ATTR_DOUBLE type.
If necessary, the accessor functions for blob can be added later

Signed-off-by: André Gaul <andre@gaul.io>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
 2017-01-04 21:36:31 +01:00
Felix Fietkau
77a629375d blob/blobmsg: add explicit typecasts for attribute iterators 
Fixes C++ compatibility.

Reported in https://forum.lede-project.org/t/blobmsg-for-each-attr-from-c/389

Signed-off-by: Felix Fietkau <nbd@nbd.name>
 2016-11-29 14:02:57 +01:00
Matthias Schiffer
1f019ceea1 Fix various memory management issues 
Consistently handle allocation failures. Some functions are changed to
return bool or int instead of void to allow returning an error.

Also fix a buffer size miscalculation in lua/uloop and use _exit() instead
of exit() on errors after forking.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
 2016-06-26 12:53:51 +02:00
Felix Fietkau
042f1a2546 blobmsg: accept NULL attr in blobmsg_get_string() 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2014-08-03 15:00:54 +02:00
Felix Fietkau
f3977836af blobmsg: add a helper function to reset the name of a blobmsg attribute 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2014-07-21 01:24:01 +02:00
Felix Fietkau
7ba1f8acd8 blobmsg: add blobmsg_check_array, which returns the size of the array 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2014-07-15 10:52:12 +02:00
Jacob Siverskog
4436338588 blob/blobmsg: Perform explicit casts from void* to avoid compilation errors when using libubox from C++. 
Signed-off by: Jacob Siverskog <jacob@teenageengineering.com>
 2014-05-09 14:33:39 +02:00
Felix Fietkau
d07b174de8 blobmsg: make length variables unsigned 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2014-04-27 16:32:09 +02:00
Felix Fietkau
58aec3c59a blobmsg: allow data/length iterator/accessor functions to work on non-blobmsg elements 
This primarily helps with simplifying the ubus APIs.
blobmsg header presence is indicated by the BLOB_ATTR_EXTENDED bit in
the id_len field.

This changes the format ABI, but not the API.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2014-03-12 20:18:12 +01:00
Felix Fietkau
914ef8f6b0 blobmsg: add blobmsg_len() for consistency (similar to blob_len) 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2013-10-20 13:19:51 +02:00
Felix Fietkau
ef9b6b92df blob/blobmsg: add null pointer checks to the *_for_each_attr functions, fix formatting 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2013-07-29 14:44:11 +02:00
Felix Fietkau
af2f52a37b blobmsg: implement blobmsg_printf and blobmsg_vprintf 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2013-02-17 16:42:12 +01:00
Felix Fietkau
4ab499899c blobmsg: add blobmsg_realloc_string_buffer() 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2013-02-10 20:43:51 +01:00
Felix Fietkau
8a89e7f388 blob/blobmsg: use 32 bit load/store for 64 bit access, unaligned attributes cause data corruption on ARM 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2013-01-23 02:41:20 +01:00
Felix Fietkau
c360ec576c blobmsg: add blobmsg_get_string 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2013-01-13 15:29:14 +01:00
Felix Fietkau
2f74dbad14 blobmsg: add blobmsg_parse_array() 
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 2013-01-08 02:05:03 +01:00
Felix Fietkau
bbdc3bdb05 blobmsg: remove the unnecessary name argument from blobmsg_check_attr_list, infer it from the list type 2012-06-24 21:11:06 +02:00
Felix Fietkau
f1494cde4d blobmsg: add blobmsg_check_attr_list() to validate element types of arrays and tables 2012-06-24 21:07:47 +02:00
Felix Fietkau
74cdaf796f switch blobmsg over to permissive license 2012-05-26 18:02:30 +02:00
Felix Fietkau
f8d3e57b45 add blobmsg_add_blob() to copy over an existing blobmsg attribute 2012-05-08 15:59:19 +02:00
Felix Fietkau
f565a7af42 blobmsg: add missing endian conversions 2011-11-17 00:47:54 +01:00
Felix Fietkau
fc20c7a031 make casts from void * explicit to avoid C++ warnings (patch by Arthur Davis) 2011-10-27 10:16:56 +02:00
Felix Fietkau
08aada9a93 make the blobmsg format endian agnostic (stick to big-endian) 2011-10-06 17:15:00 +02:00
Felix Fietkau
591a1e349f fix reads beyond the end of the buffer when iterating over blob attributes 2011-10-03 12:36:46 +02:00
Felix Fietkau
8cada85b61 add a blobmsg_type() inline function 2011-09-12 13:37:53 +02:00
Felix Fietkau
dee81b4f79 add blobmsg_get_bool 2011-09-07 06:33:36 +02:00
Felix Fietkau
abbc140e8d add BLOBMSG_TYPE_BOOL as an alias for BLOBMSG_TYPE_INT8 2011-07-29 12:56:48 +02:00
Felix Fietkau
0918243e90 move json formatting to the blobmsg_json library 2011-02-06 21:23:28 +01:00
Felix Fietkau
01ad5162b2 add a callback to the blobmsg-to-json function to override the formatting of specific attributes 2011-02-06 16:48:28 +01:00
Felix Fietkau
5aed3c2d2e blomsg: add integer attribute accessor functions 2011-02-05 02:06:49 +01:00
Felix Fietkau
29598e3dc8 add functions for allocating and adding a string buffer field 2011-02-04 21:57:59 +01:00
Felix Fietkau
7a0571a9ff blobmsg: constify and add more validation 2011-01-31 03:51:06 +01:00
Felix Fietkau
da2876acd9 add support for json-formatting blobmsg elements 2011-01-30 14:15:57 +01:00
Felix Fietkau
ff585b97c0 fix json list parsing 2011-01-30 01:13:32 +01:00
Felix Fietkau
2d9f917d00 add blobmsg_for_each_attr 2011-01-29 18:16:12 +01:00
Felix Fietkau
5129bc9401 blobmsg: make arrays structually the same as tables - simplifies library user code 2011-01-29 18:00:40 +01:00
Felix Fietkau
d28eb7fc28 add a blobmsg-to-json function 2011-01-23 22:52:53 +01:00
Felix Fietkau
fcee2d56bc add blobmsg_name() 2011-01-23 20:06:03 +01:00
Felix Fietkau
71f0be5e11 add blobmsg validation function 2011-01-23 19:55:41 +01:00
Felix Fietkau
6370c3e636 add BLOBMSG_TYPE_LAST 2010-12-29 15:08:45 +01:00
Felix Fietkau
e82d74f898 Initial import 2010-10-13 21:29:08 +02:00