tiny.reticulum.wire.context

1const std = @import("std");23/// The header's last byte names what the payload is for: nothing in particular,4/// one of the seven resource-transfer kinds, a cache request, a request or its5/// response, a path response, a command or its status, a channel message, a6/// keepalive, or one of the five link control values, following Reticulum@1.5.07/// RNS/Packet.py:72-92. A caller reads this byte to learn what an arriving8/// payload is for, and sets it on a payload it sends. A byte this list leaves9/// unnamed decodes to a value that encodes back to the same byte, so a payload10/// from a peer running a newer build survives the trip through this code.11pub const Context = enum(u8) {12    none = 0x00,13    resource = 0x01,14    resource_adv = 0x02,15    resource_req = 0x03,16    resource_hmu = 0x04,17    resource_prf = 0x05,18    resource_icl = 0x06,19    resource_rcl = 0x07,20    cache_request = 0x08,21    request = 0x09,22    response = 0x0a,23    path_response = 0x0b,24    command = 0x0c,25    command_status = 0x0d,26    channel = 0x0e,27    keepalive = 0xfa,28    linkidentify = 0xfb,29    linkclose = 0xfc,30    linkproof = 0xfd,31    lrrtt = 0xfe,32    lrproof = 0xff,33    _,3435    pub fn decode(byte: u8) Context {36        return @fromBackingInt(@intCast(byte));37    }3839    pub fn encode(self: Context) u8 {40        return @backingInt(self);41    }42};4344test "Reticulum@1.5.0 RNS/Packet.py:72-92 preserves unknown contexts" {45    const unknown = Context.decode(0x80);46    try std.testing.expectEqual(@as(u8, 0x80), unknown.encode());47}

1pub const context = @import("context.zig");