mirror of
https://github.com/mikecarper/MeshCore.git
synced 2026-11-04 12:07:42 +00:00
87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
#include <array>
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#include <cassert>
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <string>
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// The unknown-setting branches below are extracted verbatim from production.
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// The hardware-dependent recognized-setting branches are outside this fixture.
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using Fallback = void (*)(const char*, char*);
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static void commonFallback(const char* command, char* reply) {
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@COMMON_CONFIG@
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(void)config;
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if (false) {}
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@COMMON_FALLBACK@
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}
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static void observerFallback(const char* command, char* reply) {
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@COMMON_CONFIG@
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(void)config;
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if (false) {}
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@OBSERVER_FALLBACK@
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}
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static std::string unknownCommand(bool observer, size_t command_length) {
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const char* prefix = observer ? "set mqtt1." : "set repeat.";
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assert(command_length >= strlen(prefix));
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return std::string(prefix) + std::string(command_length - strlen(prefix), 'x');
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}
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template <size_t Capacity>
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static void exact(Fallback fallback, const std::string& command) {
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// Standalone arrays expose any past-end write to AddressSanitizer rather
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// than hiding it inside an allocation which includes the path/canary.
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std::array<char, Capacity> reply;
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reply.fill(char(0x55));
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fallback(command.c_str(), reply.data());
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assert(strcmp(reply.data(), "unknown config") == 0);
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for (size_t i = sizeof("unknown config"); i < reply.size(); ++i)
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assert(reply[i] == char(0x55));
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}
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template <size_t Capacity>
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static void adjacent(Fallback fallback, const std::string& command) {
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struct Buffers {
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uint8_t before[16];
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char reply[Capacity];
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uint8_t reply_path[64];
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} buffers;
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memset(&buffers, 0x55, sizeof(buffers));
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fallback(command.c_str(), buffers.reply);
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assert(strcmp(buffers.reply, "unknown config") == 0);
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for (uint8_t value : buffers.before) assert(value == 0x55);
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for (uint8_t value : buffers.reply_path) assert(value == 0x55);
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for (size_t i = sizeof("unknown config"); i < sizeof(buffers.reply); ++i)
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assert(buffers.reply[i] == char(0x55));
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}
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int main(int argc, char** argv) {
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assert(argc == 3);
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const bool observer = strcmp(argv[1], "observer") == 0;
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const std::string scenario(argv[2]);
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Fallback fallback = observer ? observerFallback : commonFallback;
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if (scenario == "local") {
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const auto command = unknownCommand(observer, 159);
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exact<160>(fallback, command);
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adjacent<160>(fallback, command);
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} else if (scenario == "radio") {
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const auto command = unknownCommand(observer, 179);
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exact<179>(fallback, command);
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adjacent<179>(fallback, command);
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} else if (scenario == "minimum") {
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const auto command = unknownCommand(observer, 179);
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exact<sizeof("unknown config")>(fallback, command);
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adjacent<sizeof("unknown config")>(fallback, command);
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} else if (scenario == "lengths") {
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for (size_t length = 16; length < 4096; ++length) {
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const auto command = unknownCommand(observer, length);
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exact<160>(fallback, command);
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exact<179>(fallback, command);
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exact<sizeof("unknown config")>(fallback, command);
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adjacent<179>(fallback, command);
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}
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} else assert(false);
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return 0;
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}
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