Create all packets

src/main.rs

@@ -1,6 +1,5 @@
 use rust_mqtt::packet::mqtt_packet::*;
 use rust_mqtt::packet::packet_type::PacketType;
-use rust_mqtt::packet::packet_builder::PacketBuilder;
 use rust_mqtt::encoding::variable_byte_integer::VariableByteIntegerEncoder;
 use rust_mqtt::encoding::variable_byte_integer::VariableByteIntegerDecoder;
 use rust_mqtt::packet::property::*;
@@ -22,18 +21,17 @@ fn main() {
     f.read(&mut buffer).expect("buffer overflow");
 
 
-    let mut txt = Vec::new();
+    //let mut txt = Vec::new();
     let mut payld = *b"xxxxx";
-    let packet = Packet::clean(txt, &mut payld);
-    let mut packet_builder = PacketBuilder::new(packet);
-    let mut buffer_reader = BuffReader::new(&buffer);
+    //let packet = Packet::clean(txt, &mut payld);
+    /*let mut buffer_reader = BuffReader::new(&buffer);
     packet_builder.decode_packet(& mut buffer_reader);
 
     
     let bytes: [u8; 4] = packet_builder.currentPacket.protocol_name.to_be_bytes();
 
     let prot = std::str::from_utf8(&bytes).unwrap();
-    log::info!("Protocol name: {}", prot)
+    log::info!("Protocol name: {}", prot)*/
 }
 
 /*fn test(tst: &str) {

src/packet/auth_packet.rs

@@ -0,0 +1,38 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+
+pub struct AuthPacket<'a, const MAX_PROPERTIES: usize> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub auth_reason: u8,
+
+    pub property_len: u32,
+
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+}
+
+
+impl<'a, const MAX_PROPERTIES: usize> AuthPacket<'a, MAX_PROPERTIES> {
+
+}  
+
+impl<'a, const MAX_PROPERTIES: usize> Packet<'a> for AuthPacket<'a, MAX_PROPERTIES> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        log::error!("PingreqPacket packet does not support decode funtion on client!");
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/connack_packet.rs

@@ -0,0 +1,76 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 18;
+
+pub struct ConnackPacket<'a> {
+
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+    pub ack_flags: u8,
+    pub connect_reason_code: u8,
+    pub property_len: u32,
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+
+}
+
+impl<'a> ConnackPacket<'a> {
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_connack_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        
+        if self.decode_fixed_header(buff_reader) != (PacketType::Connack).into() {
+            log::error!("Packet you are trying to decode is not CONNACK packet!");
+            return;
+        }
+        self.ack_flags = buff_reader.readU8().unwrap();
+        self.connect_reason_code = buff_reader.readU8().unwrap();
+        self.decode_properties(buff_reader);
+    }
+}
+
+impl<'a> Packet<'a> for ConnackPacket<'a> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_connack_packet(buff_reader);
+    }
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/control_packet.rs

@@ -0,0 +1,175 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+pub const MAX_PROPERTIES: usize = 18;
+pub const MAX_WILL_PROPERTIES: usize = 7;
+
+pub struct ControlPacket<'a> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    // variable header
+    //optional  prida se pouze u packetu ve kterych ma co delat 
+    pub packet_identifier: u16,
+    pub protocol_name_len: u16,
+    pub protocol_name: u32,
+    pub protocol_version: u8,
+    pub connect_flags: u8,
+    pub keep_alive: u16,
+    // property len
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+
+    //payload
+    pub client_id: EncodedString<'a>,
+    // property len
+    pub will_property_len: u32,
+    pub will_properties: Vec<Property<'a>, MAX_WILL_PROPERTIES>,
+    pub will_topic: EncodedString<'a>,
+    pub will_payload: BinaryData<'a>,
+    pub username: EncodedString<'a>,
+    pub password: BinaryData<'a>
+}
+
+impl<'a> ControlPacket<'a> {
+    pub fn clean(properties: Vec<Property<'a>, MAX_PROPERTIES>, will_properties: Vec<Property<'a>, MAX_WILL_PROPERTIES> ) -> Self {
+        Self{ fixed_header: 0x00, remain_len: 0, packet_identifier: 0, protocol_name_len: 0, protocol_name: 0, protocol_version: 5, connect_flags: 0, 
+            keep_alive: 0, property_len: 0, properties, client_id: EncodedString::new(), will_property_len: 0, will_properties, will_topic: EncodedString::new(), 
+            will_payload: BinaryData::new(), username: EncodedString::new(), password: BinaryData::new() }
+    }
+
+    pub fn get_reason_code(&self) {
+        log::info!("Getting reason code!");
+    }
+
+    pub fn addPacketType(& mut self, new_packet_type: PacketType) {
+        self.fixed_header = self.fixed_header & 0x0F;
+        self.fixed_header = self.fixed_header | <PacketType as Into<u8>>::into(new_packet_type);
+    }
+
+    pub fn addFlags(& mut self, dup: bool, qos: u8, retain: bool) {
+        let cur_type: u8 = self.fixed_header & 0xF0;
+        if cur_type != 0x30 {
+            log::error!("Cannot add flags into packet with other than PUBLISH type");
+            return;
+        }
+        let mut flags: u8 = 0x00;
+        if dup {
+            flags = flags | 0x08;
+        }
+        if qos == 1 {
+            flags = flags | 0x02;
+        }
+        if qos == 2 {
+            flags = flags | 0x04;
+        }
+        if retain {
+            flags = flags | 0x01;
+        }
+        self.fixed_header = cur_type | flags;
+    }
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_will_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        //todo: need to check if we are parsing only will properties
+        let will_property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Will property parsed: {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.will_properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == will_property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_payload(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.client_id = buff_reader.readString().unwrap();
+        if self.connect_flags & (1 << 2) == 1 {
+            self.decode_will_properties(buff_reader);
+            self.will_topic = buff_reader.readString().unwrap();
+            self.will_payload = buff_reader.readBinary().unwrap();
+        }
+        
+        if self.connect_flags & (1 << 7) == 1 {
+            self.username = buff_reader.readString().unwrap();
+        }
+        if self.connect_flags & (1 << 6) == 1 {
+            self.password = buff_reader.readBinary().unwrap();
+        }
+    }
+
+    pub fn decode_control_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Connect).into() {
+            log::error!("Packet you are trying to decode is not CONNECT packet!");
+        }
+        self.packet_identifier = 0;
+        self.protocol_name_len = buff_reader.readU16().unwrap();
+        self.protocol_name = buff_reader.readU32().unwrap();
+        self.protocol_version = buff_reader.readU8().unwrap();
+        self.connect_flags = buff_reader.readU8().unwrap();
+        self.keep_alive = buff_reader.readU16().unwrap();
+        self.decode_properties(buff_reader);
+        self.decode_payload(buff_reader);
+    }
+}
+
+impl<'a> Packet<'a> for ControlPacket<'a> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        log::error!("Decode function is not available for control packet!")
+        //self.decode_control_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/disconnect_packet.rs

@@ -0,0 +1,74 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+
+pub struct DisconnectPacket<'a, const MAX_PROPERTIES: usize> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub disconnect_reason: u8,
+
+    pub property_len: u32,
+
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+}
+
+
+impl<'a, const MAX_PROPERTIES: usize> DisconnectPacket<'a, MAX_PROPERTIES> {
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader<'a>) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn decode_auth_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Pingresp).into() {
+            log::error!("Packet you are trying to decode is not PUBACK packet!");
+            return;
+        }
+        self.disconnect_reason = buff_reader.readU8().unwrap();
+        self.decode_properties(buff_reader);
+    }
+}  
+
+impl<'a, const MAX_PROPERTIES: usize> Packet<'a> for DisconnectPacket<'a, MAX_PROPERTIES> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_auth_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/mod.rs

@@ -1,4 +1,17 @@
+pub mod control_packet;
 pub mod mqtt_packet;
 pub mod packet_type;
-pub mod packet_builder;
-pub mod property;
+pub mod property;
+pub mod puback_packet;
+pub mod publish_packet;
+pub mod pubrec_packet;
+pub mod connack_packet;
+pub mod pubrel_packet;
+pub mod pubcomp_packet;
+pub mod subscription_packet;
+pub mod unsubscription_packet;
+pub mod suback_packet;
+pub mod unsuback_packet;
+pub mod pingreq_packet;
+pub mod pingresp_packet;
+pub mod disconnect_packet;

src/packet/mqtt_packet.rs

@@ -1,55 +1,6 @@
-use super::property::Property;
-use super::packet_type::PacketType;
-use heapless::Vec;
+use crate::utils::buffer_reader::BuffReader;
 
-pub const MAX_PROPERTIES: usize = 18;
-
-pub struct Packet<'a> {
-    // 7 - 4 mqtt control packet type, 3-0 flagy
-    pub fixed_header: u8,
-    // 1 - 4 B lenght of variable header + len of payload
-    pub remain_len: u32,
-
-    // variable header
-    //optional  prida se pouze u packetu ve kterych ma co delat 
-    pub packet_identifier: u16,
-
-    pub protocol_name_len: u16,
-
-    pub protocol_name: u32,
-
-    pub protocol_version: u8,
-
-    pub connect_flags: u8,
-
-    pub keep_alive: u16,
-    // property len
-    pub property_len: u32,
-
-    // properties
-    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
-
-    // Payload of message
-    pub payload: &'a mut [u8]
-}
-
-impl<'a> Packet<'a> {
-    pub fn new(fixed_header: u8, remain_len: u32, packet_identifier: u16, protocol_name_len: u16,
-                protocol_name: u32, protocol_version: u8, 
-                connect_flags: u8, keep_alive: u16, property_len: u32,
-                properties: Vec<Property<'a>, MAX_PROPERTIES>, payload: &'a mut [u8]) -> Self {
-        Self { fixed_header, remain_len, packet_identifier, property_len, properties, payload, connect_flags, keep_alive, protocol_name_len, protocol_name, protocol_version }
-    }
-
-    pub fn clean(properties: Vec<Property<'a>, MAX_PROPERTIES>, payload: &'a mut [u8]) -> Self {
-        Self{ fixed_header: 0x00, remain_len: 0, packet_identifier: 0, property_len: 0, properties, payload, connect_flags: 0, keep_alive: 0, protocol_name_len: 0, protocol_name: 0, protocol_version: 5}
-    }
-
-    pub fn encode(&self) {
-        log::info!("Encoding!");
-    }
-
-    pub fn get_reason_code(&self) {
-        log::info!("Getting reason code!");
-    }
+pub trait Packet<'a> {
+    fn encode(& mut self, buffer: & mut [u8]);
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>);
 }

src/packet/packet_builder.rs

@@ -1,107 +0,0 @@
-use super::mqtt_packet::Packet;
-use super::packet_type::PacketType;
-use super::property::Property;
-use crate::utils::buffer_reader::*;
-
-// Je potreba vytvori
-
-// metody packet buildery budou prijimat jako parametr buff reader, z ktereho bude postupne parsovat 
-
-pub struct PacketBuilder<'a> {
-    pub currentPacket: Packet<'a>,
-}
-
-impl<'a> PacketBuilder<'a>  {
-
-    pub fn new(packet: Packet<'a>) -> Self {
-        Self{ currentPacket: packet }
-    }
-
-    pub fn build(&self) -> &Packet<'a> {
-        return &self.currentPacket;
-    }
-
-    pub fn decode(&self, buffer: &'a mut [u8]) -> &Packet<'a> {
-        return &self.currentPacket;
-    }
-
-    pub fn addPacketType(& mut self, new_packet_type: PacketType) {
-        self.currentPacket.fixed_header = self.currentPacket.fixed_header & 0x0F;
-        self.currentPacket.fixed_header = self.currentPacket.fixed_header | <PacketType as Into<u8>>::into(new_packet_type);
-    }
-
-    pub fn addFlags(& mut self, dup: bool, qos: u8, retain: bool) {
-        let cur_type: u8 = self.currentPacket.fixed_header & 0xF0;
-        if cur_type != 0x30 {
-            log::error!("Cannot add flags into packet with other than PUBLISH type");
-            return;
-        }
-        let mut flags: u8 = 0x00;
-        if dup {
-            flags = flags | 0x08;
-        }
-        if qos == 1 {
-            flags = flags | 0x02;
-        }
-        if qos == 2 {
-            flags = flags | 0x04;
-        }
-        if retain {
-            flags = flags | 0x01;
-        }
-        self.currentPacket.fixed_header = cur_type | flags;
-    }
-
-    pub fn completePacket(& mut self) {
-        // Tutaj se cely packet dokonci - spocita se remaining len co chybi v hlavicce atd...
-    }
-
-    pub fn decode_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
-        self.decodeFixedHeader(buff_reader);
-        let y: u8 = self.currentPacket.fixed_header & 0xF0;
-        let z: u8 = (PacketType::Connect).into();
-        if self.currentPacket.fixed_header & 0xF0 == (PacketType::Connect).into() {
-            self.decodeControllPacket(buff_reader);
-        }
-    }
-
-    pub fn decodeFixedHeader(& mut self, buff_reader: & mut BuffReader) -> PacketType {
-        let first_byte: u8 = buff_reader.readU8().unwrap();
-        self.currentPacket.fixed_header = first_byte;
-        self.currentPacket.remain_len = buff_reader.readVariableByteInt().unwrap();
-        return PacketType::from(self.currentPacket.fixed_header);
-    }
-
-    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
-        self.currentPacket.property_len = buff_reader.readVariableByteInt().unwrap();
-        let mut x: u32 = 0;
-        let mut prop: Result<Property, ParseError>;
-        loop {
-            let mut res: Property;
-            prop = Property::decode(buff_reader);
-            if let Ok(res) = prop {
-                log::info!("Parsed property {:?}", res);
-                x = x + res.len() as u32 + 1;
-                self.currentPacket.properties.push(res);
-            } else {
-                // error handlo
-                log::error!("Problem during property decoding");
-            }
-
-            
-            if x == self.currentPacket.property_len {
-                break;
-            }
-        }
-    }
-
-    pub fn decodeControllPacket(& mut self, buff_reader: & mut BuffReader<'a>) {
-        self.currentPacket.packet_identifier = 0;
-        self.currentPacket.protocol_name_len = buff_reader.readU16().unwrap();
-        self.currentPacket.protocol_name = buff_reader.readU32().unwrap();
-        self.currentPacket.protocol_version = buff_reader.readU8().unwrap();
-        self.currentPacket.connect_flags = buff_reader.readU8().unwrap();
-        self.currentPacket.keep_alive = buff_reader.readU16().unwrap();
-        self.decode_properties(buff_reader);
-    }
-}

src/packet/pingreq_packet.rs

@@ -0,0 +1,33 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 2;
+
+pub struct PingreqPacket{
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+}
+
+
+impl PingreqPacket {
+
+}  
+
+impl<'a> Packet<'a> for PingreqPacket {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        log::error!("PingreqPacket packet does not support decode funtion on client!");
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/pingresp_packet.rs

@@ -0,0 +1,43 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub struct PingrespPacket {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+}
+
+
+impl<'a> PingrespPacket {
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader<'a>) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn decode_pingresp_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Pingresp).into() {
+            log::error!("Packet you are trying to decode is not PUBACK packet!");
+            return;
+        }
+    }
+}  
+
+impl<'a> Packet<'a> for PingrespPacket {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_pingresp_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/puback_packet.rs

@@ -0,0 +1,79 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 2;
+
+pub struct PubackPacket<'a> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub packet_identifier: u16,
+    pub reason_code: u8,
+
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+}
+
+
+impl<'a> PubackPacket<'a> {
+
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn decode_puback_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Puback).into() {
+            log::error!("Packet you are trying to decode is not PUBACK packet!");
+            return;
+        }
+        self.packet_identifier = buff_reader.readU16().unwrap();
+        self.reason_code = buff_reader.readU8().unwrap();
+        self.decode_properties(buff_reader);
+    }
+}  
+
+impl<'a> Packet<'a> for PubackPacket<'a> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_puback_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/pubcomp_packet.rs

@@ -0,0 +1,79 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 2;
+
+pub struct PubcompPacket<'a> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub packet_identifier: u16,
+    pub reason_code: u8,
+
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+}
+
+
+impl<'a> PubcompPacket<'a> {
+
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn decode_puback_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Pubcomp).into() {
+            log::error!("Packet you are trying to decode is not PUBCOMP packet!");
+            return;
+        }
+        self.packet_identifier = buff_reader.readU16().unwrap();
+        self.reason_code = buff_reader.readU8().unwrap();
+        self.decode_properties(buff_reader);
+    }
+}  
+
+impl<'a> Packet<'a> for PubcompPacket<'a> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_puback_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/publish_packet.rs

@@ -0,0 +1,82 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 9;
+
+pub struct PublishPacket<'a> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub topic_name: EncodedString<'a>,
+    pub packet_identifier: u16,
+
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+
+    pub message: &'a [u8],
+}
+
+
+impl<'a> PublishPacket<'a> {
+
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn decode_publish_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Publish).into() {
+            log::error!("Packet you are trying to decode is not PUBLISH packet!");
+            return;
+        }
+        self.topic_name = buff_reader.readString().unwrap();
+        self.packet_identifier = buff_reader.readU16().unwrap();
+        self.decode_properties(buff_reader);
+        self.message = buff_reader.readMessage();
+    }
+}  
+
+impl<'a> Packet<'a> for PublishPacket<'a> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_publish_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/pubrec_packet.rs

@@ -0,0 +1,79 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 2;
+
+pub struct PubrecPacket<'a> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub packet_identifier: u16,
+    pub reason_code: u8,
+
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+}
+
+
+impl<'a> PubrecPacket<'a> {
+
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn decode_pubrec_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Pubrec).into() {
+            log::error!("Packet you are trying to decode is not PUBREC packet!");
+            return;
+        }
+        self.packet_identifier = buff_reader.readU16().unwrap();
+        self.reason_code = buff_reader.readU8().unwrap();
+        self.decode_properties(buff_reader);
+    }
+}  
+
+impl<'a> Packet<'a> for PubrecPacket<'a> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_pubrec_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/pubrel_packet.rs

@@ -0,0 +1,79 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 2;
+
+pub struct PubrelPacket<'a> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub packet_identifier: u16,
+    pub reason_code: u8,
+
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+}
+
+
+impl<'a> PubrelPacket<'a> {
+
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn decode_puback_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Pubrel).into() {
+            log::error!("Packet you are trying to decode is not PUBREL packet!");
+            return;
+        }
+        self.packet_identifier = buff_reader.readU16().unwrap();
+        self.reason_code = buff_reader.readU8().unwrap();
+        self.decode_properties(buff_reader);
+    }
+}  
+
+impl<'a> Packet<'a> for PubrelPacket<'a> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_puback_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/suback_packet.rs

@@ -0,0 +1,91 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 2;
+
+pub struct SubackPacket<'a, const MAX_REASONS: usize> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub packet_identifier: u16,
+
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+
+    pub reason_codes: Vec<u8, MAX_REASONS>,
+}
+
+
+impl<'a, const MAX_REASONS: usize> SubackPacket<'a, MAX_REASONS> {
+
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn read_reason_codes(& mut self, buff_reader: & mut BuffReader<'a>) {
+        let mut i = 0;
+        loop {
+            self.reason_codes.push(buff_reader.readU8().unwrap());
+            i = i + 1;
+            if i == MAX_REASONS {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_suback_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Suback).into() {
+            log::error!("Packet you are trying to decode is not SUBACK packet!");
+            return;
+        }
+        self.packet_identifier = buff_reader.readU16().unwrap();
+        self.decode_properties(buff_reader);
+        self.read_reason_codes(buff_reader);
+    }
+}  
+
+impl<'a, const MAX_REASONS: usize> Packet<'a> for SubackPacket<'a, MAX_REASONS>{
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_suback_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/subscription_packet.rs

@@ -0,0 +1,50 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use crate::utils::buffer_reader::TopicFilter;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 2;
+
+pub struct SubscriptionPacket<'a, const MAX_FILTERS: usize> {
+    pub maximal_filters: u8,
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub packet_identifier: u16,
+
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+
+    // topic filter len
+    pub topic_filter_let: u16,
+
+    // payload
+    pub topic_filters: Vec<TopicFilter<'a>, MAX_FILTERS>,
+}
+
+
+impl<'a, const MAX_FILTERS: usize> SubscriptionPacket<'a, MAX_FILTERS> {
+    /*pub fn new() -> Self {
+        
+    }*/
+}  
+
+impl<'a, const MAX_FILTERS: usize> Packet<'a> for SubscriptionPacket<'a, MAX_FILTERS> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        log::error!("Subscribe packet does not support decode funtion on client!");
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/unsuback_packet.rs

@@ -0,0 +1,91 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 20;
+
+pub struct UnsubackPacket<'a, const MAX_REASONS: usize> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub packet_identifier: u16,
+
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+
+    pub reason_codes: Vec<u8, MAX_REASONS>,
+}
+
+
+impl<'a, const MAX_REASONS: usize> UnsubackPacket<'a, MAX_REASONS> {
+
+    pub fn decode_properties(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.property_len = buff_reader.readVariableByteInt().unwrap();
+        let mut x: u32 = 0;
+        let mut prop: Result<Property, ParseError>;
+        loop {
+            let mut res: Property;
+            prop = Property::decode(buff_reader);
+            if let Ok(res) = prop {
+                log::info!("Parsed property {:?}", res);
+                x = x + res.len() as u32 + 1;
+                self.properties.push(res);
+            } else {
+                // error handlo
+                log::error!("Problem during property decoding");
+            }
+            
+            if x == self.property_len {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_fixed_header(& mut self, buff_reader: & mut BuffReader) -> PacketType {
+        let first_byte: u8 = buff_reader.readU8().unwrap();
+        self.fixed_header = first_byte;
+        self.remain_len = buff_reader.readVariableByteInt().unwrap();
+        return PacketType::from(self.fixed_header);
+    }
+
+    pub fn read_reason_codes(& mut self, buff_reader: & mut BuffReader<'a>) {
+        let mut i = 0;
+        loop {
+            self.reason_codes.push(buff_reader.readU8().unwrap());
+            i = i + 1;
+            if i == MAX_REASONS {
+                break;
+            }
+        }
+    }
+
+    pub fn decode_suback_packet(& mut self, buff_reader: & mut BuffReader<'a>) {
+        if self.decode_fixed_header(buff_reader) != (PacketType::Suback).into() {
+            log::error!("Packet you are trying to decode is not SUBACK packet!");
+            return;
+        }
+        self.packet_identifier = buff_reader.readU16().unwrap();
+        self.decode_properties(buff_reader);
+        self.read_reason_codes(buff_reader);
+    }
+}  
+
+impl<'a, const MAX_REASONS: usize> Packet<'a> for UnsubackPacket<'a, MAX_REASONS>{
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        self.decode_suback_packet(buff_reader);
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/packet/unsubscription_packet.rs

@@ -0,0 +1,49 @@
+use super::property::Property;
+use super::packet_type::PacketType;
+use crate::utils::buffer_reader::BuffReader;
+use crate::utils::buffer_reader::EncodedString;
+use crate::utils::buffer_reader::BinaryData;
+use crate::utils::buffer_reader::ParseError;
+use crate::packet::mqtt_packet::Packet;
+use crate::utils::buffer_reader::TopicFilter;
+use heapless::Vec;
+
+
+pub const MAX_PROPERTIES: usize = 20;
+
+pub struct UnsubscriptionPacket<'a, const MAX_FILTERS: usize> {
+    // 7 - 4 mqtt control packet type, 3-0 flagy
+    pub fixed_header: u8,
+    // 1 - 4 B lenght of variable header + len of payload
+    pub remain_len: u32,
+
+    pub packet_identifier: u16,
+
+    pub property_len: u32,
+
+    // properties
+    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
+
+    // topic filter len
+    pub topic_filter_let: u16,
+
+    // payload
+    pub topic_filters: Vec<TopicFilter<'a>, MAX_FILTERS>,
+}
+
+
+impl<'a, const MAX_FILTERS: usize> UnsubscriptionPacket<'a, MAX_FILTERS> {
+    /*pub fn new() -> Self {
+        
+    }*/
+}  
+
+impl<'a, const MAX_FILTERS: usize> Packet<'a> for UnsubscriptionPacket<'a, MAX_FILTERS> {
+    fn decode(& mut self, buff_reader: & mut BuffReader<'a>) {
+        log::error!("Unsubscribe packet does not support decode funtion on client!");
+    }
+
+    fn encode(& mut self, buffer: & mut [u8]) {
+
+    }
+}

src/utils/buffer_reader.rs

@@ -5,10 +5,14 @@ use core::mem;
 #[derive(Debug)]
 pub struct EncodedString<'a> {
     pub string: &'a str,
-    pub len: u16
+    pub len: u16,
 }
 
 impl EncodedString<'_> {
+    pub fn new() -> Self {
+        Self { string: "", len: 0 }
+    }
+
     pub fn len(&self) -> u16 {
         return self.len + 2;
     }
@@ -21,6 +25,10 @@ pub struct BinaryData<'a> {
 }
 
 impl BinaryData<'_> {
+    pub fn new() -> Self {
+        Self { bin: &[0], len: 0 }
+    }
+
     pub fn len(&self) -> u16 {
         return self.len + 2;
     }
@@ -39,6 +47,23 @@ impl StringPair<'_> {
     }
 }
 
+#[derive(Debug)]
+pub struct TopicFilter<'a> {
+    pub len: u16,
+    pub filter: EncodedString<'a>,
+    pub sub_options: u8,
+}
+
+impl TopicFilter<'_> {
+    pub fn new() -> Self {
+        Self { len: 0, filter: EncodedString::new(), sub_options: 0 }
+    }
+
+    pub fn len(&self) -> u16 {
+        return self.len + 2;
+    }
+}
+
 #[derive(core::fmt::Debug)]
 #[derive(Clone)]
 pub enum ParseError {
@@ -142,4 +167,8 @@ impl<'a> BuffReader<'a> {
         }
         return Ok(StringPair { name: name.unwrap(), value: value.unwrap() });
     }
+
+    pub fn readMessage(& mut self) -> &'a [u8] {
+        return &self.buffer[self.position..];
+    }
 }