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Welcome to the Domo Library. +//! +//! This is a library full of abstractions and helpers for the Domo protocol library. + +#![forbid(clippy::unwrap_used, clippy::expect_used)] + +/// All abstractions and helpers for the packet struct. +pub mod packet; + +/// Node structs and helpers +pub mod node; \ No newline at end of file diff --git a/domo_lib/src/node/mod.rs b/domo_lib/src/node/mod.rs new file mode 100644 index 0000000..81a471e --- /dev/null +++ b/domo_lib/src/node/mod.rs @@ -0,0 +1,26 @@ +use std::collections::HashMap; +use domo_proto::identifier::Identifier; +use self::property::Property; + +pub mod property; + +pub struct Node { + // Identifier of the node + pub identifier: Identifier, + /// According to the domo protocol spec: + /// Strings have a limit of 32 bytes. + /// Theoretically there is a limit of 0xFFFFFFFF (4294967295) properties. + pub properties: HashMap, + /// Domo protocol allows for nodes under nodes therefore there is a hashmap for it. + pub nodes: HashMap +} + +impl Node { + pub fn new(identifier: Identifier) -> Self { + Self { + identifier, + properties: HashMap::new(), + nodes: HashMap::new() + } + } +} \ No newline at end of file diff --git a/domo_lib/src/node/property.rs b/domo_lib/src/node/property.rs new file mode 100644 index 0000000..4a58b1e --- /dev/null +++ b/domo_lib/src/node/property.rs @@ -0,0 +1,6 @@ +use domo_proto::data_types::DataType; + +pub struct Property { + pub name: String, + pub value: DataType +} \ No newline at end of file diff --git a/domo_lib/src/packet.rs b/domo_lib/src/packet.rs new file mode 100644 index 0000000..e5470b3 --- /dev/null +++ b/domo_lib/src/packet.rs @@ -0,0 +1,59 @@ +use domo_proto::packet::Packet; +use std::io; +use std::io::Read; + +pub fn read_packet(stream: &mut R) -> io::Result +where + R: Read, +{ + let version = { + let mut buf = [0_u8; 1]; + stream.read_exact(&mut buf)?; + buf[0] + }; + + match version { + 1 => { + let header = { + let mut buf = [0_u8; 0x13]; // this is 0x14 (header length) - 1 (version) + stream.read_exact(&mut buf)?; + buf + }; + + let size = u16::from_be_bytes([header[0x10], header[0x11]]); // relative to header piece + + let mut packet_buf = vec![]; + packet_buf.push(version); + packet_buf.extend(header); + + stream + .take(size as u64 + 4) // create new read instance and make sure we do not read more than allocated. (body and checksum) + .read_to_end(&mut packet_buf)?; // read to end into packet_buf + + Ok(Packet::try_from(packet_buf)?) + } + _ => Err(io::Error::new( + io::ErrorKind::InvalidData, + "Unsupported version", + )), + } +} + +#[test] +/// check if packet is the same when created and read +fn test_read_packet() { + use std::io::Cursor; + use domo_proto::packet::Packet; + let p = Packet::default(); + + let mut buf = vec![]; + buf.extend(Into::>::into(p.clone())); + buf.extend(Into::>::into(p.clone())); + + let mut cursor = Cursor::new(buf); + + assert_eq!( + Into::>::into(read_packet(&mut cursor).unwrap()), + Into::>::into(p), + ); +} \ No newline at end of file