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//! Conflux-related functionality
pub(crate) mod msghandler;
use tor_cell::relaycell::RelayCmd;
/// Whether the specified `cmd` counts towards the conflux sequence numbers.
pub(crate) fn cmd_counts_towards_seqno(cmd: RelayCmd) -> bool {
// Note: copy-pasted from c-tor
match cmd {
// These are all fine to multiplex, and must be so that ordering is preserved
RelayCmd::BEGIN | RelayCmd::DATA | RelayCmd::END | RelayCmd::CONNECTED => true,
// We can't multiplex these because they are circuit-specific
RelayCmd::SENDME
| RelayCmd::EXTEND
| RelayCmd::EXTENDED
| RelayCmd::TRUNCATE
| RelayCmd::TRUNCATED
| RelayCmd::DROP => false,
// We must multiplex RESOLVEs because their ordering impacts begin/end.
RelayCmd::RESOLVE | RelayCmd::RESOLVED => true,
// These are all circuit-specific
RelayCmd::BEGIN_DIR
| RelayCmd::EXTEND2
| RelayCmd::EXTENDED2
| RelayCmd::ESTABLISH_INTRO
| RelayCmd::ESTABLISH_RENDEZVOUS
| RelayCmd::INTRODUCE1
| RelayCmd::INTRODUCE2
| RelayCmd::RENDEZVOUS1
| RelayCmd::RENDEZVOUS2
| RelayCmd::INTRO_ESTABLISHED
| RelayCmd::RENDEZVOUS_ESTABLISHED
| RelayCmd::INTRODUCE_ACK
| RelayCmd::PADDING_NEGOTIATE
| RelayCmd::PADDING_NEGOTIATED => false,
// Flow control cells must be ordered (see prop 329).
RelayCmd::XOFF | RelayCmd::XON => true,
// These two are not multiplexed, because they must be processed immediately
// to update sequence numbers before any other cells are processed on the circuit
RelayCmd::CONFLUX_SWITCH
| RelayCmd::CONFLUX_LINK
| RelayCmd::CONFLUX_LINKED
| RelayCmd::CONFLUX_LINKED_ACK => false,
_ => {
tracing::warn!("Conflux asked to multiplex unknown relay command {cmd}");
false
}
}
}
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