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feat: QUIC Address discovery extension
add frame types transport parameter encoding and decoding - to my best understanding fix typo add some utility functions add initial observed address frames add frame encoding and decoding adjust stats minimal debugging for received observed addr simplify setting extension in transport parameter rework frame structure and send observed addr frames with path challenge ones tweak example to start testing fix encoding, send with handshake clippy fix docs reject observed addr frames when not negotiated replace request_id with seq_no according to new spec replace code point for transport parameter replace code point for frames remove sending observed address frame in handshake in server side treat as probing frame in payload processing ack is already managed by is_ack_eliciting send with path_response as well add frame to retransmits and ignore old frames send observed addr at least once per path fmt reword comment remove trailing whites keep observed address reports per path remove addressed TODO small improvement in readability add retransmission with fresh info retransmit just once fix should send logic add observed addr event surface the info restore trace level of frames some extra logs rename roles and var improve error msg assuming the default as disabled is ok, remove comment use safe arithmetic with varints for the seq_no move transport param code to method instead of From impl fix example, finally remove excesive log add helper fn carry old report into new path generate notification only on changed values downgrade log add sending test add resumption test on the acceptance case add resumption test on the rejection case spelling actual spelling and undo debug change dumb lints some spelling and formatting add retransmission test make a bit more readable update hexas make naming consistent, add test check docs for consistency
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| //! Address discovery types from | ||
| //! <https://datatracker.ietf.org/doc/draft-seemann-quic-address-discovery/> | ||
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| use crate::VarInt; | ||
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| pub(crate) const TRANSPORT_PARAMETER_CODE: u64 = 0x9f81a176; | ||
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| /// The role of each participant. | ||
| /// | ||
| /// When enabled, this is reported as a transport parameter. | ||
| #[derive(PartialEq, Eq, Clone, Copy, Debug, Default)] | ||
| pub(crate) enum Role { | ||
| /// Is able to report observer addresses to other peers, but it's not interested in receiving | ||
| /// reports about its own address. | ||
| SendOnly, | ||
| /// Is interested on reports about its own observed address, but will not report back to other | ||
| /// peers. | ||
| ReceiveOnly, | ||
| /// Will both report and receive reports of observed addresses. | ||
| Both, | ||
| /// Address discovery is disabled. | ||
| #[default] | ||
| Disabled, | ||
| } | ||
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| impl TryFrom<VarInt> for Role { | ||
| type Error = crate::transport_parameters::Error; | ||
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| fn try_from(value: VarInt) -> Result<Self, Self::Error> { | ||
| match value.0 { | ||
| 0 => Ok(Self::SendOnly), | ||
| 1 => Ok(Self::ReceiveOnly), | ||
| 2 => Ok(Self::Both), | ||
| _ => Err(crate::transport_parameters::Error::IllegalValue), | ||
| } | ||
| } | ||
| } | ||
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| impl Role { | ||
| /// Whether address discovery is disabled. | ||
| pub(crate) fn is_disabled(&self) -> bool { | ||
| matches!(self, Self::Disabled) | ||
| } | ||
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| /// Whether this peer's role allows for address reporting to other peers. | ||
| fn is_reporter(&self) -> bool { | ||
| matches!(self, Self::SendOnly | Self::Both) | ||
| } | ||
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| /// Whether this peer's role accepts observed address reports. | ||
| fn receives_reports(&self) -> bool { | ||
| matches!(self, Self::ReceiveOnly | Self::Both) | ||
| } | ||
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| /// Whether this peer should report observed addresses to the other peer. | ||
| pub(crate) fn should_report(&self, other: &Self) -> bool { | ||
| self.is_reporter() && other.receives_reports() | ||
| } | ||
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| /// Sets whether this peer should provide observed addresses to other peers. | ||
| pub(crate) fn send_reports_to_peers(&mut self, provide: bool) { | ||
| if provide { | ||
| self.enable_sending_reports_to_peers() | ||
| } else { | ||
| self.disable_sending_reports_to_peers() | ||
| } | ||
| } | ||
|
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| /// Enables sending reports of observed addresses to other peers. | ||
| fn enable_sending_reports_to_peers(&mut self) { | ||
| match self { | ||
| Self::SendOnly => {} // already enabled | ||
| Self::ReceiveOnly => *self = Self::Both, | ||
| Self::Both => {} // already enabled | ||
| Self::Disabled => *self = Self::SendOnly, | ||
| } | ||
| } | ||
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| /// Disables sending reports of observed addresses to other peers. | ||
| fn disable_sending_reports_to_peers(&mut self) { | ||
| match self { | ||
| Self::SendOnly => *self = Self::Disabled, | ||
| Self::ReceiveOnly => {} // already disabled | ||
| Self::Both => *self = Self::ReceiveOnly, | ||
| Self::Disabled => {} // already disabled | ||
| } | ||
| } | ||
|
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| /// Sets whether this peer should accept received reports of observed addresses from other | ||
| /// peers. | ||
| pub(crate) fn receive_reports_from_peers(&mut self, receive: bool) { | ||
| if receive { | ||
| self.enable_receiving_reports_from_peers() | ||
| } else { | ||
| self.disable_receiving_reports_from_peers() | ||
| } | ||
| } | ||
|
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| /// Enables receiving reports of observed addresses from other peers. | ||
| fn enable_receiving_reports_from_peers(&mut self) { | ||
| match self { | ||
| Self::SendOnly => *self = Self::Both, | ||
| Self::ReceiveOnly => {} // already enabled | ||
| Self::Both => {} // already enabled | ||
| Self::Disabled => *self = Self::ReceiveOnly, | ||
| } | ||
| } | ||
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| /// Disables receiving reports of observed addresses from other peers. | ||
| fn disable_receiving_reports_from_peers(&mut self) { | ||
| match self { | ||
| Self::SendOnly => {} // already disabled | ||
| Self::ReceiveOnly => *self = Self::Disabled, | ||
| Self::Both => *self = Self::SendOnly, | ||
| Self::Disabled => {} // already disabled | ||
| } | ||
| } | ||
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| /// Gives the [`VarInt`] representing this [`Role`] as a transport parameter. | ||
| pub(crate) fn as_transport_parameter(&self) -> Option<VarInt> { | ||
| match self { | ||
| Self::SendOnly => Some(VarInt(0)), | ||
| Self::ReceiveOnly => Some(VarInt(1)), | ||
| Self::Both => Some(VarInt(2)), | ||
| Self::Disabled => None, | ||
| } | ||
| } | ||
| } |
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