53 lines
1.6 KiB
Rust
53 lines
1.6 KiB
Rust
const TARGET_KIND_MASK: u64 = 0xC000_0000_0000_0000;
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const TARGET_ID_MASK: u64 = (1_u64 << 48) - 1;
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const USER_TARGET_KIND: u64 = 0x4000_0000_0000_0000;
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const IOTA_TARGET_KIND: u64 = 0x8000_0000_0000_0000;
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/*
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* Relay receivers carry their namespace in the wire identity. This prevents
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* a user ID and an Iota ID with the same numeric value from selecting the
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* wrong connection at an Omikron.
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*/
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub enum RouteTarget {
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User(u64),
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Iota(u64),
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}
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impl RouteTarget {
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pub fn wire_id(self) -> Option<u64> {
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let (kind, id) = match self {
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Self::User(id) => (USER_TARGET_KIND, id),
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Self::Iota(id) => (IOTA_TARGET_KIND, id),
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};
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(id > 0 && id <= TARGET_ID_MASK).then_some(kind | id)
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}
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pub fn from_wire_id(value: u64) -> Option<Self> {
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let id = value & TARGET_ID_MASK;
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if id == 0 || value & !(TARGET_KIND_MASK | TARGET_ID_MASK) != 0 {
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return None;
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}
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match value & TARGET_KIND_MASK {
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USER_TARGET_KIND => Some(Self::User(id)),
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IOTA_TARGET_KIND => Some(Self::Iota(id)),
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_ => None,
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}
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}
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pub const fn id(self) -> u64 {
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match self {
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Self::User(id) | Self::Iota(id) => id,
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}
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}
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}
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impl std::fmt::Display for RouteTarget {
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fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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Self::User(id) => write!(formatter, "User({id})"),
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Self::Iota(id) => write!(formatter, "Iota({id})"),
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}
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}
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}
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