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44 lines
2.1 KiB
Markdown
44 lines
2.1 KiB
Markdown
# CONTRIBUTING to Laika
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HEAD: https://github.com/CPunch/Laika/tree/main
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## Directories explained
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- `/cmake-modules` holds helper functions for CMake.
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- `/lib` is a shared static library between the bot, shell & CNC. LibSodium is also vendor'd here.
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- `/cnc` is the Command aNd Control server. (Currently only targets Linux)
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- `/bot` is the bot client to be ran on the target machine. (Targets both Linux and Windows)
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- `/shell` is the main shell to connect to the CNC server with to issue commands. (Currently only targets Linux)
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- `/tools` holds tools for generating keypairs, etc.
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## Tasks and TODOs
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Looking for some simple tasks that need to get done for that sweet 'contributor' cred? Check here!
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- Implement `lib/win/winpersist.c`
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- Fix address sanitizer for CMake DEBUG builds
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## Lib: Error Handling
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Error handling in Laika is done via the 'lerror.h' header library. It's a small and simple error handling solution written for laika, however can be stripped and used as a simple error handling library. Error handling in Laika is used similarly to other languages, implementing a try & catch block and is achieved using setjmp(). The LAIKA_ERROR(...) is used to throw errors.
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Example:
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```C
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LAIKA_TRY
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printf("Ran first\n");
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LAIKA_ERROR("Debug message here\n");
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printf("You'll never see this\n");
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LAIKA_CATCH
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printf("Ran second!\n");
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LAIKA_TRYEND
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printf("Ran last!\n");
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```
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Some minor inconveniences include:
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- `return` or other control-flow statements that leave the current scope cannot be used in the LAIKA_TRY or LAIKA_CATCH scopes.
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- max of 32 depth, avoid using recursively.
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- not thread safe.
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## Lib: Task Service
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Tasks can be scheduled on a delta-period (call X function every approximate N seconds). laikaT_pollTasks() is used to check & run any currently queued tasks. This is useful for sending keep-alive packets, polling shell pipes, or other repeatably scheduled tasks. Most laikaT_pollTasks() calls are done in the peerHandler for each client/server.
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## Bot: Platform-specific backends
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`bot/win` and `bot/lin` include code for platform-specific code that can't be quickly "ifdef"d away. These mainly include stuff like persistence or opening pseudo-ttys. |