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#[cfg(test)]
mod param_test;
pub(crate) mod param_chunk_list;
pub(crate) mod param_forward_tsn_supported;
pub(crate) mod param_header;
pub(crate) mod param_heartbeat_info;
pub(crate) mod param_outgoing_reset_request;
pub(crate) mod param_random;
pub(crate) mod param_reconfig_response;
pub(crate) mod param_requested_hmac_algorithm;
pub(crate) mod param_state_cookie;
pub(crate) mod param_supported_extensions;
pub(crate) mod param_type;
pub(crate) mod param_unknown;
pub(crate) mod param_unrecognized;
use crate::error::{Error, Result};
use crate::param::{
param_chunk_list::ParamChunkList, param_forward_tsn_supported::ParamForwardTsnSupported,
param_heartbeat_info::ParamHeartbeatInfo,
param_outgoing_reset_request::ParamOutgoingResetRequest, param_random::ParamRandom,
param_reconfig_response::ParamReconfigResponse,
param_requested_hmac_algorithm::ParamRequestedHmacAlgorithm,
param_state_cookie::ParamStateCookie, param_supported_extensions::ParamSupportedExtensions,
};
use param_header::*;
use param_type::*;
use crate::param::param_unknown::ParamUnknown;
use bytes::{Buf, Bytes, BytesMut};
use std::{any::Any, fmt};
pub(crate) trait Param: fmt::Display + fmt::Debug {
fn header(&self) -> ParamHeader;
fn unmarshal(raw: &Bytes) -> Result<Self>
where
Self: Sized;
fn marshal_to(&self, buf: &mut BytesMut) -> Result<usize>;
fn value_length(&self) -> usize;
fn clone_to(&self) -> Box<dyn Param + Send + Sync>;
fn as_any(&self) -> &(dyn Any + Send + Sync);
fn marshal(&self) -> Result<Bytes> {
let capacity = PARAM_HEADER_LENGTH + self.value_length();
let mut buf = BytesMut::with_capacity(capacity);
self.marshal_to(&mut buf)?;
Ok(buf.freeze())
}
}
impl Clone for Box<dyn Param + Send + Sync> {
fn clone(&self) -> Box<dyn Param + Send + Sync> {
self.clone_to()
}
}
pub(crate) fn build_param(raw_param: &Bytes) -> Result<Box<dyn Param + Send + Sync>> {
if raw_param.len() < PARAM_HEADER_LENGTH {
return Err(Error::ErrParamHeaderTooShort);
}
let reader = &mut raw_param.slice(..2);
let raw_type = reader.get_u16();
match raw_type.into() {
ParamType::ForwardTsnSupp => Ok(Box::new(ParamForwardTsnSupported::unmarshal(raw_param)?)),
ParamType::SupportedExt => Ok(Box::new(ParamSupportedExtensions::unmarshal(raw_param)?)),
ParamType::Random => Ok(Box::new(ParamRandom::unmarshal(raw_param)?)),
ParamType::ReqHmacAlgo => Ok(Box::new(ParamRequestedHmacAlgorithm::unmarshal(raw_param)?)),
ParamType::ChunkList => Ok(Box::new(ParamChunkList::unmarshal(raw_param)?)),
ParamType::StateCookie => Ok(Box::new(ParamStateCookie::unmarshal(raw_param)?)),
ParamType::HeartbeatInfo => Ok(Box::new(ParamHeartbeatInfo::unmarshal(raw_param)?)),
ParamType::OutSsnResetReq => Ok(Box::new(ParamOutgoingResetRequest::unmarshal(raw_param)?)),
ParamType::ReconfigResp => Ok(Box::new(ParamReconfigResponse::unmarshal(raw_param)?)),
_ => {
let stop_processing = ((raw_type >> 15) & 0x01) == 0;
if stop_processing {
Err(Error::ErrParamTypeUnhandled { typ: raw_type })
} else {
Ok(Box::new(ParamUnknown::unmarshal(raw_param)?))
}
}
}
}