tomato/toxcore/bin_unpack.c
Green Sky 3105cc20ef Squashed 'external/toxcore/c-toxcore/' changes from d9b8fa6098d..81b1e4f6348
81b1e4f6348 chore: Release v0.2.21-rc.1
9303e2e49a1 chore: Update the pkgsrc versions in the update-versions tool
71ec4b3b1e9 chore: Update the version-sync script to work in a post-tox.api.h world
66da842f753 chore: Add version update script compatible with ci-tools.
199878f7660 chore: Use new bazel script for circle ci.
8278e9cda46 chore: Add release issue template and workflow.
a9bb3a1c4d1 chore: Fix alpine-s390x build.
6e0a641272e chore: Add a source tarball deploy workflow.
4adebe4d8b1 chore: Don't upload ios/macos variants in deploy workflows.
18f1d858ccb chore: Move one of the 3 freebsd builds to post-submit.
432ab60c002 feat: Add a Makefile for the single file deploy build.
a86c0011fd5 chore: Add deploy job for single C file library.
2e7495e8f2a docs: Update changelog format to use the new clog-compatible way.
a682da99e84 chore: Export wasmExports from the wasm binary.
12f34cdff27 chore: Add wasm to the nightly binary deploys.
1451029613f chore: Add strict-abi support for macOS/iOS.
c53c30e09d9 chore: Add time option to manual fuzz trigger.
2ccecdc2a1a chore: Add remaining fuzz tests to cflite.
4626c2e230e test: Add a Net_Crypto fuzz test.
b4a0e617c48 refactor: Use IP string length from ip_ntoa instead of strlen.
b85b91f22f6 cleanup: rename getnodes/sendnodes to nodes request/response This change alignes the naming to be closer to the spec and make it less ambiguous. This change also changes the naming of some private/experimental marked APIs. - tox_callback_dht_nodes_response() - tox_dht_nodes_request() - Tox_Event_Dht_Get_Nodes_Response
f1991aaa029 perf: Use stack allocation for strerror rendering.
3984211ccbf cleanup: remove kicked peers from saved peers list
26a991ed2be fix: ip to string function not accepting tcp families
712861f2e6d cleanup: Make websockify output qtox-compatible logging.
01932ea2f73 chore: Add opus and vpx to the toxcore wasm build.
d29c42ef631 refactor: don't fully discard received DHT nodes. This is mostly forward thinking, where we might introduce other ip families, in addition to ipv4, ipv6, tcp_ipv4 etc.
21e2325934f chore: Fix xcframework tarball creation.
b10c8b766ba chore: Fix xcframework checksum creation.
93787a9322e chore: Add ios/macos framework build.
9f723f891d3 fix: run do_gca also in bootstrap nodes
496cc703556 chore: Support arm64 iphone simulator.
aa0e2a8e928 chore: Add support for more iOS architectures.
13ad8e81cbf chore: Add binary deploy workflows.
c8344726378 refactor: Move tox_log_level out into its own file.
8799bea76c3 cleanup: Mark events/dispatch headers as experimental.
d4164edb548 refactor: Remove tox_types.h; use `struct` tags instead.
d408c982090 refactor: Move `Tox_Options` to `tox_options.h`.
5ab42d41209 chore: Move most cirrus jobs to circleci.
463eeae1144 cleanup: Avoid clashing with global define `DEBUG`.
92cc1e91747 refactor: Make Tox_Options own the passed proxy host and savedata.
f276b397226 test: Add some more asserts for I/O and alloc to succeed.
edb4dfc4869 fix: Don't crash on malloc failures in bin_unpack.
be457d5d0b2 cleanup: Use tox memory for bin_unpack and net_strerror.

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 81b1e4f6348124784088591c4fe9ab41e273031d
2025-03-12 19:16:50 +01:00

214 lines
4.9 KiB
C

/* SPDX-License-Identifier: GPL-3.0-or-later
* Copyright © 2022-2025 The TokTok team.
*/
#include "bin_unpack.h"
#include <assert.h>
#include <string.h>
#include "../third_party/cmp/cmp.h"
#include "attributes.h"
#include "ccompat.h"
#include "mem.h"
struct Bin_Unpack {
const Memory *mem;
const uint8_t *bytes;
uint32_t bytes_size;
cmp_ctx_t ctx;
};
non_null()
static bool buf_reader(cmp_ctx_t *ctx, void *data, size_t limit)
{
uint8_t *bytes = (uint8_t *)data;
Bin_Unpack *reader = (Bin_Unpack *)ctx->buf;
assert(reader != nullptr && reader->bytes != nullptr);
if (limit > reader->bytes_size) {
return false;
}
memcpy(bytes, reader->bytes, limit);
reader->bytes += limit;
reader->bytes_size -= limit;
return true;
}
non_null()
static bool buf_skipper(cmp_ctx_t *ctx, size_t count)
{
Bin_Unpack *reader = (Bin_Unpack *)ctx->buf;
assert(reader != nullptr && reader->bytes != nullptr);
if (count > reader->bytes_size) {
return false;
}
reader->bytes += count;
reader->bytes_size -= count;
return true;
}
non_null()
static size_t null_writer(cmp_ctx_t *ctx, const void *data, size_t count)
{
assert(count == 0);
return 0;
}
non_null()
static void bin_unpack_init(Bin_Unpack *bu, const Memory *mem, const uint8_t *buf, uint32_t buf_size)
{
bu->mem = mem;
bu->bytes = buf;
bu->bytes_size = buf_size;
cmp_init(&bu->ctx, bu, buf_reader, buf_skipper, null_writer);
}
bool bin_unpack_obj(const Memory *mem, bin_unpack_cb *callback, void *obj, const uint8_t *buf, uint32_t buf_size)
{
Bin_Unpack bu;
bin_unpack_init(&bu, mem, buf, buf_size);
return callback(obj, &bu);
}
bool bin_unpack_array(Bin_Unpack *bu, uint32_t *size)
{
return cmp_read_array(&bu->ctx, size) && *size <= bu->bytes_size;
}
bool bin_unpack_array_fixed(Bin_Unpack *bu, uint32_t required_size, uint32_t *actual_size)
{
uint32_t size = 0;
const bool success = cmp_read_array(&bu->ctx, &size) && size == required_size;
if (actual_size != nullptr) {
*actual_size = size;
}
return success;
}
bool bin_unpack_bool(Bin_Unpack *bu, bool *val)
{
return cmp_read_bool(&bu->ctx, val);
}
bool bin_unpack_u08(Bin_Unpack *bu, uint8_t *val)
{
return cmp_read_uchar(&bu->ctx, val);
}
bool bin_unpack_u16(Bin_Unpack *bu, uint16_t *val)
{
return cmp_read_ushort(&bu->ctx, val);
}
bool bin_unpack_u32(Bin_Unpack *bu, uint32_t *val)
{
return cmp_read_uint(&bu->ctx, val);
}
bool bin_unpack_u64(Bin_Unpack *bu, uint64_t *val)
{
return cmp_read_ulong(&bu->ctx, val);
}
bool bin_unpack_nil(Bin_Unpack *bu)
{
return cmp_read_nil(&bu->ctx);
}
bool bin_unpack_bin(Bin_Unpack *bu, uint8_t **data_ptr, uint32_t *data_length_ptr)
{
uint32_t bin_size;
if (!bin_unpack_bin_size(bu, &bin_size) || bin_size > bu->bytes_size) {
// There aren't as many bytes as this bin claims to want to allocate.
return false;
}
uint8_t *const data = (uint8_t *)mem_balloc(bu->mem, bin_size);
if (data == nullptr) {
return false;
}
if (!bin_unpack_bin_b(bu, data, bin_size)) {
mem_delete(bu->mem, data);
return false;
}
*data_ptr = data;
*data_length_ptr = bin_size;
return true;
}
bool bin_unpack_bin_max(Bin_Unpack *bu, uint8_t *data, uint16_t *data_length_ptr, uint16_t max_data_length)
{
uint32_t bin_size;
if (!bin_unpack_bin_size(bu, &bin_size) || bin_size > max_data_length) {
return false;
}
*data_length_ptr = bin_size;
return bin_unpack_bin_b(bu, data, bin_size);
}
bool bin_unpack_bin_fixed(Bin_Unpack *bu, uint8_t *data, uint32_t data_length)
{
uint32_t bin_size;
if (!bin_unpack_bin_size(bu, &bin_size) || bin_size != data_length) {
return false;
}
return bin_unpack_bin_b(bu, data, bin_size);
}
bool bin_unpack_bin_size(Bin_Unpack *bu, uint32_t *size)
{
return cmp_read_bin_size(&bu->ctx, size);
}
bool bin_unpack_u08_b(Bin_Unpack *bu, uint8_t *val)
{
return bin_unpack_bin_b(bu, val, 1);
}
bool bin_unpack_u16_b(Bin_Unpack *bu, uint16_t *val)
{
uint8_t hi = 0;
uint8_t lo = 0;
if (!(bin_unpack_u08_b(bu, &hi)
&& bin_unpack_u08_b(bu, &lo))) {
return false;
}
*val = ((uint16_t)hi << 8) | lo;
return true;
}
bool bin_unpack_u32_b(Bin_Unpack *bu, uint32_t *val)
{
uint16_t hi = 0;
uint16_t lo = 0;
if (!(bin_unpack_u16_b(bu, &hi)
&& bin_unpack_u16_b(bu, &lo))) {
return false;
}
*val = ((uint32_t)hi << 16) | lo;
return true;
}
bool bin_unpack_u64_b(Bin_Unpack *bu, uint64_t *val)
{
uint32_t hi = 0;
uint32_t lo = 0;
if (!(bin_unpack_u32_b(bu, &hi)
&& bin_unpack_u32_b(bu, &lo))) {
return false;
}
*val = ((uint64_t)hi << 32) | lo;
return true;
}
bool bin_unpack_bin_b(Bin_Unpack *bu, uint8_t *data, uint32_t length)
{
return bu->ctx.read(&bu->ctx, data, length);
}