src/bin/main.rs

@@ -4,7 +4,7 @@ use log::{info};
 use networking::interserver::AuthToken;
 use elseware::login::login::LoginServerState;
 use elseware::login::character::CharacterServerState;
-use elseware::patch::patch::{PatchServerState, generate_patch_tree, load_config, load_motd};
+use elseware::patch::{PatchServerState, generate_patch_tree, load_config, load_motd};
 use elseware::ship::ship::ShipServerStateBuilder;
 
 use maps::Holiday;

src/bin/patch.rs

@@ -1,4 +1,4 @@
-use elseware::patch::patch::{PatchServerState, generate_patch_tree, load_config_env, load_motd};
+use elseware::patch::{PatchServerState, generate_patch_tree, load_config_env, load_motd};
 use log::info;
 
 fn main() {

src/patch/mod.rs

@@ -1,2 +1,432 @@
-#[allow(clippy::module_inception)]
-pub mod patch;
+use std::collections::{HashMap, HashSet};
+use std::fs;
+use std::io;
+use std::io::{Read};
+use std::path::{Path, PathBuf};
+use rand::Rng;
+use crc::{crc32, Hasher32};
+use libpso::{PacketParseError, PSOPacket};
+use libpso::packet::patch::*;
+use libpso::crypto::pc::PSOPCCipher;
+use ron::de::from_str;
+use serde::Deserialize;
+
+use networking::mainloop::{NetworkError};
+use networking::serverstate::{RecvServerPacket, SendServerPacket, ServerState, OnConnect, ClientId};
+
+#[derive(Debug)]
+pub enum PatchError {
+    NetworkError(NetworkError),
+    IOError(std::io::Error),
+}
+
+impl From<NetworkError> for PatchError {
+    fn from(err: NetworkError) -> PatchError {
+        PatchError::NetworkError(err)
+    }
+}
+
+impl From<std::io::Error> for PatchError {
+    fn from(err: std::io::Error) -> PatchError {
+        PatchError::IOError(err)
+    }
+}
+
+
+#[derive(Debug, Clone)]
+pub struct PatchFile {
+    path: PathBuf,
+    checksum: u32,
+    size: u32,
+}
+
+pub enum PatchTreeIterItem {
+    Directory(PathBuf),
+    File(PathBuf, u32),
+    UpDirectory,
+}
+
+#[derive(Debug, Clone)]
+pub enum PatchFileTree {
+    Directory(PathBuf, Vec<PatchFileTree>),
+    File(PathBuf, u32), // file_id
+}
+
+impl PatchFileTree {
+    fn iter_dir(tree: &PatchFileTree) -> Vec<PatchTreeIterItem> {
+        let mut v = Vec::new();
+
+        match tree {
+            PatchFileTree::Directory(dir, files) => {
+                v.push(PatchTreeIterItem::Directory(dir.clone()));
+                for file in files {
+                    v.append(&mut PatchFileTree::iter_dir(file));
+                }
+                v.push(PatchTreeIterItem::UpDirectory);
+            },
+            PatchFileTree::File(path, id) => {
+                v.push(PatchTreeIterItem::File(path.clone(), *id));
+            }
+        }
+
+        v
+    }
+
+    pub fn flatten(&self) -> Vec<PatchTreeIterItem> {
+        PatchFileTree::iter_dir(self)
+    }
+}
+
+
+#[derive(Debug)]
+pub enum RecvPatchPacket {
+    PatchWelcomeReply(PatchWelcomeReply),
+    LoginReply(LoginReply),
+    FileInfoReply(FileInfoReply),
+    FileInfoListEnd(FileInfoListEnd),
+}
+
+impl RecvServerPacket for RecvPatchPacket {
+    fn from_bytes(data: &[u8]) -> Result<RecvPatchPacket, PacketParseError> {
+        match data[2] {
+            0x02 => Ok(RecvPatchPacket::PatchWelcomeReply(PatchWelcomeReply::from_bytes(data)?)),
+            0x04 => Ok(RecvPatchPacket::LoginReply(LoginReply::from_bytes(data)?)),
+            0x0F => Ok(RecvPatchPacket::FileInfoReply(FileInfoReply::from_bytes(data)?)),
+            0x10 => Ok(RecvPatchPacket::FileInfoListEnd(FileInfoListEnd::from_bytes(data)?)),
+            _ => Err(PacketParseError::WrongPacketForServerType(u16::from_le_bytes([data[2], data[3]]), data.to_vec()))
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum SendPatchPacket {
+    ChangeDirectory(ChangeDirectory),
+    EndFileSend(EndFileSend),
+    FileInfo(FileInfo),
+    FileSend(Box<FileSend>),
+    FilesToPatchMetadata(FilesToPatchMetadata),
+    FinalizePatching(FinalizePatching),
+    Message(Message),
+    PatchEndList(PatchEndList),
+    PatchStartList(PatchStartList),
+    PatchWelcome(PatchWelcome),
+    RequestLogin(RequestLogin),
+    StartFileSend(StartFileSend),
+    UpOneDirectory(UpOneDirectory),
+}
+
+impl SendServerPacket for SendPatchPacket {
+    fn as_bytes(&self) -> Vec<u8> {
+        match self {
+            SendPatchPacket::ChangeDirectory(pkt) => pkt.as_bytes(),
+            SendPatchPacket::EndFileSend(pkt) => pkt.as_bytes(),
+            SendPatchPacket::FileInfo(pkt) => pkt.as_bytes(),
+            SendPatchPacket::FileSend(pkt) => pkt.as_bytes(),
+            SendPatchPacket::FilesToPatchMetadata(pkt) => pkt.as_bytes(),
+            SendPatchPacket::FinalizePatching(pkt) => pkt.as_bytes(),
+            SendPatchPacket::Message(pkt) => pkt.as_bytes(),
+            SendPatchPacket::PatchEndList(pkt) => pkt.as_bytes(),
+            SendPatchPacket::PatchStartList(pkt) => pkt.as_bytes(),
+            SendPatchPacket::PatchWelcome(pkt) => pkt.as_bytes(),
+            SendPatchPacket::RequestLogin(pkt) => pkt.as_bytes(),
+            SendPatchPacket::StartFileSend(pkt) => pkt.as_bytes(),
+            SendPatchPacket::UpOneDirectory(pkt) => pkt.as_bytes(),
+        }
+    }
+}
+
+
+#[derive(Clone)]
+pub struct PatchServerState {
+    patch_file_tree: PatchFileTree,
+    patch_file_lookup: HashMap<u32, PatchFile>,
+    patch_file_info: Vec<FileInfoReply>,
+    patch_motd: String,
+}
+
+impl PatchServerState {
+    pub fn new(patch_file_tree: PatchFileTree, patch_file_lookup: HashMap<u32, PatchFile>, patch_motd: String) -> PatchServerState {
+        PatchServerState {
+            patch_file_tree,
+            patch_file_lookup,
+            patch_file_info: Vec::new(),
+            patch_motd,
+        }
+    }
+}
+
+#[async_trait::async_trait]
+impl ServerState for PatchServerState {
+    type SendPacket = SendPatchPacket;
+    type RecvPacket = RecvPatchPacket;
+    type Cipher = PSOPCCipher;
+    type PacketError = PatchError;
+
+    async fn on_connect(&mut self, _id: ClientId) -> Result<Vec<OnConnect<Self::SendPacket, Self::Cipher>>, PatchError> {
+        let mut rng = rand::thread_rng();
+        let key_in: u32 = rng.gen();
+        let key_out: u32 = rng.gen();
+
+        Ok(vec![OnConnect::Packet(SendPatchPacket::PatchWelcome(PatchWelcome::new(key_out, key_in))),
+                OnConnect::Cipher(PSOPCCipher::new(key_in), PSOPCCipher::new(key_out))
+        ])
+    }
+
+    async fn handle(&mut self, id: ClientId, pkt: RecvPatchPacket) -> Result<Vec<(ClientId, SendPatchPacket)>, PatchError> {
+        Ok(match pkt {
+            RecvPatchPacket::PatchWelcomeReply(_pkt) => {
+                vec![SendPatchPacket::RequestLogin(RequestLogin {})]
+                    .into_iter()
+                    .map(move |pkt| (id, pkt))
+                    .collect()
+            },
+            RecvPatchPacket::LoginReply(_pkt) => {
+                let mut pkts = vec![SendPatchPacket::Message(Message::new(self.patch_motd.clone()))];
+                pkts.append(&mut get_file_list_packets(&self.patch_file_tree));
+                pkts.push(SendPatchPacket::PatchEndList(PatchEndList {}));
+                pkts
+                    .into_iter()
+                    .map(move |pkt| (id, pkt))
+                    .collect()
+            },
+            RecvPatchPacket::FileInfoReply(pkt) => {
+                self.patch_file_info.push(pkt);
+                Vec::new()
+            },
+            RecvPatchPacket::FileInfoListEnd(_pkt) => {
+                let need_update = self.patch_file_info.iter()
+                    .filter(|file_info| does_file_need_updating(file_info, &self.patch_file_lookup))
+                    .collect::<Vec<_>>();
+
+                let total_size = need_update.iter().fold(0, |a, file_info| a + file_info.size);
+                let total_files = need_update.len() as u32;
+
+                vec![SendPatchPacket::FilesToPatchMetadata(FilesToPatchMetadata::new(total_size, total_files)),
+                     SendPatchPacket::PatchStartList(PatchStartList {})]
+                    .into_iter()
+                    .chain(SendFileIterator::new(self))
+                    .map(move |pkt| (id, pkt))
+                    .collect()
+            }
+        })
+    }
+
+    async fn on_disconnect(&mut self, _id: ClientId) -> Result<Vec<(ClientId, SendPatchPacket)>, PatchError> {
+        Ok(Vec::new())
+    }
+}
+
+fn load_patch_dir(basedir: &str, patchbase: &str, file_ids: &mut HashMap<u32, PatchFile>) -> PatchFileTree {
+    let paths = fs::read_dir(basedir).expect("could not read directory");
+
+    let mut files = Vec::new();
+    let mut dirs = Vec::new();
+    for p in paths {
+        let path = p.expect("not a real path").path();
+        let patch_path = path.strip_prefix(basedir).unwrap();
+        if path.is_dir() {
+            dirs.push(load_patch_dir(path.to_str().unwrap(), patch_path.to_str().unwrap(), file_ids));
+        }
+        else {
+            files.push(PatchFileTree::File(patch_path.to_path_buf(), file_ids.len() as u32));
+            let (checksum, size) = get_checksum_and_size(&path).unwrap();
+            file_ids.insert(file_ids.len() as u32, PatchFile {
+                path,
+                checksum,
+                size,
+            });
+        }
+    }
+
+    files.append(&mut dirs);
+
+    PatchFileTree::Directory(PathBuf::from(patchbase), files)
+}
+
+pub fn generate_patch_tree(basedir: &str) -> (PatchFileTree, HashMap<u32, PatchFile>) {
+    let mut file_ids = HashMap::new();
+
+    let patch_tree = load_patch_dir(basedir, "", &mut file_ids);
+
+    (patch_tree, file_ids)
+}
+
+
+fn get_file_list_packets(patch_file_tree: &PatchFileTree) -> Vec<SendPatchPacket> {
+    let mut pkts = Vec::new();
+
+    for item in patch_file_tree.flatten() {
+        match item {
+            PatchTreeIterItem::Directory(path) => {
+                pkts.push(SendPatchPacket::ChangeDirectory(ChangeDirectory::new(path.to_str().unwrap())));
+            },
+            PatchTreeIterItem::File(path, id) => {
+                pkts.push(SendPatchPacket::FileInfo(FileInfo::new(path.to_str().unwrap(), id)));
+            },
+            PatchTreeIterItem::UpDirectory => {
+                pkts.push(SendPatchPacket::UpOneDirectory(UpOneDirectory {}));
+            }
+        }
+    }
+
+    pkts
+}
+
+fn get_checksum_and_size(path: &Path) -> Result<(u32, u32), PatchError> {
+    let file = fs::File::open(path)?;
+    let size = file.metadata().unwrap().len();
+    let mut crc = crc32::Digest::new(crc32::IEEE);
+    let mut buf = [0u8; 1024 * 32];
+    let mut reader = io::BufReader::new(file);
+    while let Ok(len) = reader.read(&mut buf) {
+        if len == 0 {
+            break;
+        }
+        crc.write(&buf[0..len]);
+    }
+
+    Ok((crc.sum32(), size as u32))
+}
+
+fn does_file_need_updating(file_info: &FileInfoReply, patch_file_lookup: &HashMap<u32, PatchFile>) -> bool {
+    let patch_file = patch_file_lookup.get(&file_info.id).unwrap();
+    patch_file.checksum != file_info.checksum || patch_file.size != file_info.size
+}
+
+
+struct SendFileIterator {
+    done: bool,
+    file_iter: Box<dyn Iterator<Item = PatchTreeIterItem> + Send>,
+    patch_file_lookup: HashMap<u32, PatchFile>,
+    current_file: Option<io::BufReader<fs::File>>,
+    chunk_num: u32,
+}
+
+impl SendFileIterator {
+    fn new(state: &PatchServerState) -> SendFileIterator {
+        let file_ids_to_update = state.patch_file_info.iter()
+            .filter(|file_info| does_file_need_updating(file_info, &state.patch_file_lookup))
+            .map(|k| k.id)
+            .collect::<HashSet<_>>();
+
+        SendFileIterator {
+            done: false,
+            patch_file_lookup: state.patch_file_lookup.clone(),
+            file_iter: Box::new(state.patch_file_tree.flatten().into_iter().filter(move |file| {
+                match file {
+                    PatchTreeIterItem::File(_path, id) => {
+                        file_ids_to_update.contains(id)
+                    },
+                    _ => true,
+                }
+            })),
+            current_file: None,
+            chunk_num: 0,
+        }
+    }
+}
+
+impl Iterator for SendFileIterator {
+    type Item = SendPatchPacket;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if self.done {
+            return None;
+        }
+
+        match self.current_file {
+            Some(ref mut file) => {
+                let mut buf = [0u8; PATCH_FILE_CHUNK_SIZE as usize];
+                let len = file.read(&mut buf).unwrap();
+                if len == 0 {
+                    self.current_file = None;
+                    self.chunk_num = 0;
+                    Some(SendPatchPacket::EndFileSend(EndFileSend::new()))
+                }
+                else {
+                    let mut crc = crc32::Digest::new(crc32::IEEE);
+                    crc.write(&buf[0..len]);
+                    let pkt = SendPatchPacket::FileSend(Box::new(FileSend {
+                        chunk_num: self.chunk_num,
+                        checksum: crc.sum32(),
+                        chunk_size: len as u32,
+                        buffer: buf,
+                    }));
+                    self.chunk_num += 1;
+                    Some(pkt)
+                }
+            },
+            None => {
+                match self.file_iter.next() {
+                    Some(next_file) => {
+                        match next_file {
+                            PatchTreeIterItem::Directory(path) => {
+                                Some(SendPatchPacket::ChangeDirectory(ChangeDirectory::new(path.to_str().unwrap())))
+                            },
+                            PatchTreeIterItem::File(path, id) => {
+                                let patch_file = self.patch_file_lookup.get(&id).unwrap();
+                                let file = fs::File::open(&patch_file.path).unwrap();
+                                let size = file.metadata().unwrap().len();
+                                self.current_file = Some(io::BufReader::new(file));
+                                Some(SendPatchPacket::StartFileSend(StartFileSend::new(path.to_str().unwrap(), size as u32, id)))
+                            },
+                            PatchTreeIterItem::UpDirectory => {
+                                Some(SendPatchPacket::UpOneDirectory(UpOneDirectory {}))
+                            },
+                        }
+                    },
+                    None => {
+                        self.current_file = None;
+                        self.done = true;
+                        Some(SendPatchPacket::FinalizePatching(FinalizePatching {}))
+                    }
+                }
+            }
+        }
+    }
+}
+
+#[derive(Debug, Deserialize)]
+pub struct PatchConfig {
+    pub path: String,
+    pub ip: String, // TODO: this does nothing
+    pub port: u16,
+}
+
+pub fn load_config() -> PatchConfig {
+    let ini_file = match fs::File::open(std::path::Path::new("patch.ron")) {
+        Err(err) => panic!("Failed to open patch.ron config file. \n{err}"),
+        Ok(ini_file) => ini_file,
+    };
+
+    let mut s = String::new();
+    if let Err(err) = (&ini_file).read_to_string(&mut s) {
+        panic!("Failed to read patch.ron config file. \n{err}");
+    }
+
+    let config: PatchConfig = match from_str(s.as_str()) {
+        Ok(config) => config,
+        Err(err) => panic!("Failed to load values from patch.ron \n{err}"),
+    };
+    config
+}
+
+pub fn load_config_env() -> PatchConfig {
+    let patch_path = std::env::var("PATCHFILE_DIR").unwrap();
+    let patch_port = std::env::var("PATCH_PORT").unwrap().parse().unwrap();
+
+    PatchConfig {
+        path: patch_path,
+        ip: "127.0.0.1".into(),
+        port: patch_port,
+    }
+}
+
+pub fn load_motd() -> String {
+    if let Ok(m) = fs::read_to_string("patch.motd") {
+        m
+    }
+    else {
+        "Welcome to Elseware!".to_string()
+    }
+}

src/patch/patch.rs

@@ -1,432 +0,0 @@
-use std::collections::{HashMap, HashSet};
-use std::fs;
-use std::io;
-use std::io::{Read};
-use std::path::{Path, PathBuf};
-use rand::Rng;
-use crc::{crc32, Hasher32};
-use libpso::{PacketParseError, PSOPacket};
-use libpso::packet::patch::*;
-use libpso::crypto::pc::PSOPCCipher;
-use ron::de::from_str;
-use serde::Deserialize;
-
-use networking::mainloop::{NetworkError};
-use networking::serverstate::{RecvServerPacket, SendServerPacket, ServerState, OnConnect, ClientId};
-
-#[derive(Debug)]
-pub enum PatchError {
-    NetworkError(NetworkError),
-    IOError(std::io::Error),
-}
-
-impl From<NetworkError> for PatchError {
-    fn from(err: NetworkError) -> PatchError {
-        PatchError::NetworkError(err)
-    }
-}
-
-impl From<std::io::Error> for PatchError {
-    fn from(err: std::io::Error) -> PatchError {
-        PatchError::IOError(err)
-    }
-}
-
-
-#[derive(Debug, Clone)]
-pub struct PatchFile {
-    path: PathBuf,
-    checksum: u32,
-    size: u32,
-}
-
-pub enum PatchTreeIterItem {
-    Directory(PathBuf),
-    File(PathBuf, u32),
-    UpDirectory,
-}
-
-#[derive(Debug, Clone)]
-pub enum PatchFileTree {
-    Directory(PathBuf, Vec<PatchFileTree>),
-    File(PathBuf, u32), // file_id
-}
-
-impl PatchFileTree {
-    fn iter_dir(tree: &PatchFileTree) -> Vec<PatchTreeIterItem> {
-        let mut v = Vec::new();
-
-        match tree {
-            PatchFileTree::Directory(dir, files) => {
-                v.push(PatchTreeIterItem::Directory(dir.clone()));
-                for file in files {
-                    v.append(&mut PatchFileTree::iter_dir(file));
-                }
-                v.push(PatchTreeIterItem::UpDirectory);
-            },
-            PatchFileTree::File(path, id) => {
-                v.push(PatchTreeIterItem::File(path.clone(), *id));
-            }
-        }
-
-        v
-    }
-
-    pub fn flatten(&self) -> Vec<PatchTreeIterItem> {
-        PatchFileTree::iter_dir(self)
-    }
-}
-
-
-#[derive(Debug)]
-pub enum RecvPatchPacket {
-    PatchWelcomeReply(PatchWelcomeReply),
-    LoginReply(LoginReply),
-    FileInfoReply(FileInfoReply),
-    FileInfoListEnd(FileInfoListEnd),
-}
-
-impl RecvServerPacket for RecvPatchPacket {
-    fn from_bytes(data: &[u8]) -> Result<RecvPatchPacket, PacketParseError> {
-        match data[2] {
-            0x02 => Ok(RecvPatchPacket::PatchWelcomeReply(PatchWelcomeReply::from_bytes(data)?)),
-            0x04 => Ok(RecvPatchPacket::LoginReply(LoginReply::from_bytes(data)?)),
-            0x0F => Ok(RecvPatchPacket::FileInfoReply(FileInfoReply::from_bytes(data)?)),
-            0x10 => Ok(RecvPatchPacket::FileInfoListEnd(FileInfoListEnd::from_bytes(data)?)),
-            _ => Err(PacketParseError::WrongPacketForServerType(u16::from_le_bytes([data[2], data[3]]), data.to_vec()))
-        }
-    }
-}
-
-#[derive(Debug)]
-pub enum SendPatchPacket {
-    ChangeDirectory(ChangeDirectory),
-    EndFileSend(EndFileSend),
-    FileInfo(FileInfo),
-    FileSend(Box<FileSend>),
-    FilesToPatchMetadata(FilesToPatchMetadata),
-    FinalizePatching(FinalizePatching),
-    Message(Message),
-    PatchEndList(PatchEndList),
-    PatchStartList(PatchStartList),
-    PatchWelcome(PatchWelcome),
-    RequestLogin(RequestLogin),
-    StartFileSend(StartFileSend),
-    UpOneDirectory(UpOneDirectory),
-}
-
-impl SendServerPacket for SendPatchPacket {
-    fn as_bytes(&self) -> Vec<u8> {
-        match self {
-            SendPatchPacket::ChangeDirectory(pkt) => pkt.as_bytes(),
-            SendPatchPacket::EndFileSend(pkt) => pkt.as_bytes(),
-            SendPatchPacket::FileInfo(pkt) => pkt.as_bytes(),
-            SendPatchPacket::FileSend(pkt) => pkt.as_bytes(),
-            SendPatchPacket::FilesToPatchMetadata(pkt) => pkt.as_bytes(),
-            SendPatchPacket::FinalizePatching(pkt) => pkt.as_bytes(),
-            SendPatchPacket::Message(pkt) => pkt.as_bytes(),
-            SendPatchPacket::PatchEndList(pkt) => pkt.as_bytes(),
-            SendPatchPacket::PatchStartList(pkt) => pkt.as_bytes(),
-            SendPatchPacket::PatchWelcome(pkt) => pkt.as_bytes(),
-            SendPatchPacket::RequestLogin(pkt) => pkt.as_bytes(),
-            SendPatchPacket::StartFileSend(pkt) => pkt.as_bytes(),
-            SendPatchPacket::UpOneDirectory(pkt) => pkt.as_bytes(),
-        }
-    }
-}
-
-
-#[derive(Clone)]
-pub struct PatchServerState {
-    patch_file_tree: PatchFileTree,
-    patch_file_lookup: HashMap<u32, PatchFile>,
-    patch_file_info: Vec<FileInfoReply>,
-    patch_motd: String,
-}
-
-impl PatchServerState {
-    pub fn new(patch_file_tree: PatchFileTree, patch_file_lookup: HashMap<u32, PatchFile>, patch_motd: String) -> PatchServerState {
-        PatchServerState {
-            patch_file_tree,
-            patch_file_lookup,
-            patch_file_info: Vec::new(),
-            patch_motd,
-        }
-    }
-}
-
-#[async_trait::async_trait]
-impl ServerState for PatchServerState {
-    type SendPacket = SendPatchPacket;
-    type RecvPacket = RecvPatchPacket;
-    type Cipher = PSOPCCipher;
-    type PacketError = PatchError;
-
-    async fn on_connect(&mut self, _id: ClientId) -> Result<Vec<OnConnect<Self::SendPacket, Self::Cipher>>, PatchError> {
-        let mut rng = rand::thread_rng();
-        let key_in: u32 = rng.gen();
-        let key_out: u32 = rng.gen();
-
-        Ok(vec![OnConnect::Packet(SendPatchPacket::PatchWelcome(PatchWelcome::new(key_out, key_in))),
-                OnConnect::Cipher(PSOPCCipher::new(key_in), PSOPCCipher::new(key_out))
-        ])
-    }
-
-    async fn handle(&mut self, id: ClientId, pkt: RecvPatchPacket) -> Result<Vec<(ClientId, SendPatchPacket)>, PatchError> {
-        Ok(match pkt {
-            RecvPatchPacket::PatchWelcomeReply(_pkt) => {
-                vec![SendPatchPacket::RequestLogin(RequestLogin {})]
-                    .into_iter()
-                    .map(move |pkt| (id, pkt))
-                    .collect()
-            },
-            RecvPatchPacket::LoginReply(_pkt) => {
-                let mut pkts = vec![SendPatchPacket::Message(Message::new(self.patch_motd.clone()))];
-                pkts.append(&mut get_file_list_packets(&self.patch_file_tree));
-                pkts.push(SendPatchPacket::PatchEndList(PatchEndList {}));
-                pkts
-                    .into_iter()
-                    .map(move |pkt| (id, pkt))
-                    .collect()
-            },
-            RecvPatchPacket::FileInfoReply(pkt) => {
-                self.patch_file_info.push(pkt);
-                Vec::new()
-            },
-            RecvPatchPacket::FileInfoListEnd(_pkt) => {
-                let need_update = self.patch_file_info.iter()
-                    .filter(|file_info| does_file_need_updating(file_info, &self.patch_file_lookup))
-                    .collect::<Vec<_>>();
-
-                let total_size = need_update.iter().fold(0, |a, file_info| a + file_info.size);
-                let total_files = need_update.len() as u32;
-
-                vec![SendPatchPacket::FilesToPatchMetadata(FilesToPatchMetadata::new(total_size, total_files)),
-                     SendPatchPacket::PatchStartList(PatchStartList {})]
-                    .into_iter()
-                    .chain(SendFileIterator::new(self))
-                    .map(move |pkt| (id, pkt))
-                    .collect()
-            }
-        })
-    }
-
-    async fn on_disconnect(&mut self, _id: ClientId) -> Result<Vec<(ClientId, SendPatchPacket)>, PatchError> {
-        Ok(Vec::new())
-    }
-}
-
-fn load_patch_dir(basedir: &str, patchbase: &str, file_ids: &mut HashMap<u32, PatchFile>) -> PatchFileTree {
-    let paths = fs::read_dir(basedir).expect("could not read directory");
-
-    let mut files = Vec::new();
-    let mut dirs = Vec::new();
-    for p in paths {
-        let path = p.expect("not a real path").path();
-        let patch_path = path.strip_prefix(basedir).unwrap();
-        if path.is_dir() {
-            dirs.push(load_patch_dir(path.to_str().unwrap(), patch_path.to_str().unwrap(), file_ids));
-        }
-        else {
-            files.push(PatchFileTree::File(patch_path.to_path_buf(), file_ids.len() as u32));
-            let (checksum, size) = get_checksum_and_size(&path).unwrap();
-            file_ids.insert(file_ids.len() as u32, PatchFile {
-                path,
-                checksum,
-                size,
-            });
-        }
-    }
-
-    files.append(&mut dirs);
-
-    PatchFileTree::Directory(PathBuf::from(patchbase), files)
-}
-
-pub fn generate_patch_tree(basedir: &str) -> (PatchFileTree, HashMap<u32, PatchFile>) {
-    let mut file_ids = HashMap::new();
-
-    let patch_tree = load_patch_dir(basedir, "", &mut file_ids);
-
-    (patch_tree, file_ids)
-}
-
-
-fn get_file_list_packets(patch_file_tree: &PatchFileTree) -> Vec<SendPatchPacket> {
-    let mut pkts = Vec::new();
-
-    for item in patch_file_tree.flatten() {
-        match item {
-            PatchTreeIterItem::Directory(path) => {
-                pkts.push(SendPatchPacket::ChangeDirectory(ChangeDirectory::new(path.to_str().unwrap())));
-            },
-            PatchTreeIterItem::File(path, id) => {
-                pkts.push(SendPatchPacket::FileInfo(FileInfo::new(path.to_str().unwrap(), id)));
-            },
-            PatchTreeIterItem::UpDirectory => {
-                pkts.push(SendPatchPacket::UpOneDirectory(UpOneDirectory {}));
-            }
-        }
-    }
-
-    pkts
-}
-
-fn get_checksum_and_size(path: &Path) -> Result<(u32, u32), PatchError> {
-    let file = fs::File::open(path)?;
-    let size = file.metadata().unwrap().len();
-    let mut crc = crc32::Digest::new(crc32::IEEE);
-    let mut buf = [0u8; 1024 * 32];
-    let mut reader = io::BufReader::new(file);
-    while let Ok(len) = reader.read(&mut buf) {
-        if len == 0 {
-            break;
-        }
-        crc.write(&buf[0..len]);
-    }
-
-    Ok((crc.sum32(), size as u32))
-}
-
-fn does_file_need_updating(file_info: &FileInfoReply, patch_file_lookup: &HashMap<u32, PatchFile>) -> bool {
-    let patch_file = patch_file_lookup.get(&file_info.id).unwrap();
-    patch_file.checksum != file_info.checksum || patch_file.size != file_info.size
-}
-
-
-struct SendFileIterator {
-    done: bool,
-    file_iter: Box<dyn Iterator<Item = PatchTreeIterItem> + Send>,
-    patch_file_lookup: HashMap<u32, PatchFile>,
-    current_file: Option<io::BufReader<fs::File>>,
-    chunk_num: u32,
-}
-
-impl SendFileIterator {
-    fn new(state: &PatchServerState) -> SendFileIterator {
-        let file_ids_to_update = state.patch_file_info.iter()
-            .filter(|file_info| does_file_need_updating(file_info, &state.patch_file_lookup))
-            .map(|k| k.id)
-            .collect::<HashSet<_>>();
-
-        SendFileIterator {
-            done: false,
-            patch_file_lookup: state.patch_file_lookup.clone(),
-            file_iter: Box::new(state.patch_file_tree.flatten().into_iter().filter(move |file| {
-                match file {
-                    PatchTreeIterItem::File(_path, id) => {
-                        file_ids_to_update.contains(id)
-                    },
-                    _ => true,
-                }
-            })),
-            current_file: None,
-            chunk_num: 0,
-        }
-    }
-}
-
-impl Iterator for SendFileIterator {
-    type Item = SendPatchPacket;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        if self.done {
-            return None;
-        }
-
-        match self.current_file {
-            Some(ref mut file) => {
-                let mut buf = [0u8; PATCH_FILE_CHUNK_SIZE as usize];
-                let len = file.read(&mut buf).unwrap();
-                if len == 0 {
-                    self.current_file = None;
-                    self.chunk_num = 0;
-                    Some(SendPatchPacket::EndFileSend(EndFileSend::new()))
-                }
-                else {
-                    let mut crc = crc32::Digest::new(crc32::IEEE);
-                    crc.write(&buf[0..len]);
-                    let pkt = SendPatchPacket::FileSend(Box::new(FileSend {
-                        chunk_num: self.chunk_num,
-                        checksum: crc.sum32(),
-                        chunk_size: len as u32,
-                        buffer: buf,
-                    }));
-                    self.chunk_num += 1;
-                    Some(pkt)
-                }
-            },
-            None => {
-                match self.file_iter.next() {
-                    Some(next_file) => {
-                        match next_file {
-                            PatchTreeIterItem::Directory(path) => {
-                                Some(SendPatchPacket::ChangeDirectory(ChangeDirectory::new(path.to_str().unwrap())))
-                            },
-                            PatchTreeIterItem::File(path, id) => {
-                                let patch_file = self.patch_file_lookup.get(&id).unwrap();
-                                let file = fs::File::open(&patch_file.path).unwrap();
-                                let size = file.metadata().unwrap().len();
-                                self.current_file = Some(io::BufReader::new(file));
-                                Some(SendPatchPacket::StartFileSend(StartFileSend::new(path.to_str().unwrap(), size as u32, id)))
-                            },
-                            PatchTreeIterItem::UpDirectory => {
-                                Some(SendPatchPacket::UpOneDirectory(UpOneDirectory {}))
-                            },
-                        }
-                    },
-                    None => {
-                        self.current_file = None;
-                        self.done = true;
-                        Some(SendPatchPacket::FinalizePatching(FinalizePatching {}))
-                    }
-                }
-            }
-        }
-    }
-}
-
-#[derive(Debug, Deserialize)]
-pub struct PatchConfig {
-    pub path: String,
-    pub ip: String, // TODO: this does nothing
-    pub port: u16,
-}
-
-pub fn load_config() -> PatchConfig {
-    let ini_file = match fs::File::open(std::path::Path::new("patch.ron")) {
-        Err(err) => panic!("Failed to open patch.ron config file. \n{err}"),
-        Ok(ini_file) => ini_file,
-    };
-
-    let mut s = String::new();
-    if let Err(err) = (&ini_file).read_to_string(&mut s) {
-        panic!("Failed to read patch.ron config file. \n{err}");
-    }
-
-    let config: PatchConfig = match from_str(s.as_str()) {
-        Ok(config) => config,
-        Err(err) => panic!("Failed to load values from patch.ron \n{err}"),
-    };
-    config
-}
-
-pub fn load_config_env() -> PatchConfig {
-    let patch_path = std::env::var("PATCHFILE_DIR").unwrap();
-    let patch_port = std::env::var("PATCH_PORT").unwrap().parse().unwrap();
-
-    PatchConfig {
-        path: patch_path,
-        ip: "127.0.0.1".into(),
-        port: patch_port,
-    }
-}
-
-pub fn load_motd() -> String {
-    if let Ok(m) = fs::read_to_string("patch.motd") {
-        m
-    }
-    else {
-        "Welcome to Elseware!".to_string()
-    }
-}