preamble.go RawHistoryFolder

1// Preamble and envelope limits for vev's Protobuf wire contract. The
2// directional envelope and preamble shapes live in schema/envelope.proto;
3// generated *.pb.go files are never edited.
4package wire
5
6// ProtocolEpoch identifies the current wire epoch; see schema/envelope.proto.
7// Bumped only for an intentional clean break; QUIC ALPN binds to it.
8const ProtocolEpoch uint32 = 1
9
10// PreambleMagic opens every preamble ("VEV1"); see schema/envelope.proto.
11const PreambleMagic uint32 = 0x56455631
12
13// AbsoluteEnvelopeLimit is the 16 MiB absolute ceiling for one serialized
14// envelope, carried over from MaxFrameLen minus the legacy type byte.
15const AbsoluteEnvelopeLimit = 16 << 20
16
17// PreambleLimit bounds the serialized preamble envelope.
18const PreambleLimit = 4 << 10
19
20// ControlEnvelopeLimit bounds non-Output, non-image envelopes.
21const ControlEnvelopeLimit = 1 << 20

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