use `config_local_dir`

I'll swap back to the crates.io version if `config_local_dir` is merged
upstream, or if it times out I'll fork it.

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "vendored/directories"]
+	path = vendored/directories
+	url = git@github.com:ReactorScram/directories-rs.git

Cargo.lock

@@ -35,8 +35,6 @@ checksum = "06821ea598337a8412cf47c5b71c3bc694a7f0aed188ac28b836fab164a2c202"
 [[package]]
 name = "directories"
 version = "4.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f51c5d4ddabd36886dd3e1438cb358cdcb0d7c499cb99cb4ac2e38e18b5cb210"
 dependencies = [
  "dirs-sys",
 ]

Cargo.toml

@@ -13,7 +13,7 @@ version = "0.1.6"
 
 [dependencies]
 configparser = "3.0.0"
-directories = "4.0.1"
+directories = { path = "vendored/directories" }
 mac_address = "1.1.2"
 rand = "0.8.4"
 thiserror = "1.0.30"

src/avalanche.rs

@@ -0,0 +1,40 @@
+type Mac = [u8; 6];
+
+pub fn debug () {
+	for input in [
+		[0, 0, 0, 0, 0, 0],
+		[0, 0, 0, 0, 0, 1],
+		[1, 0, 0, 0, 0, 0],
+		[1, 0, 0, 0, 0, 1],
+	] {
+		assert_eq! (unmix (mix (input)), input);
+	}
+	
+	println! ("Passed");
+}
+
+// NOT intended for any cryptography or security. This is TRIVIALLY reversible.
+// It's just to make it easier for humans to tell apart MACs where only a couple
+// numbers differ.
+
+fn mix (i: Mac) -> Mac {
+	[
+		i [0] ^ i [5],
+		i [1] ^ i [4],
+		i [2] ^ i [3],
+		i [3],
+		i [4],
+		i [5],
+	]
+}
+
+fn unmix (i: Mac) -> Mac {
+	[
+		i [0] ^ i [5],
+		i [1] ^ i [4],
+		i [2] ^ i [3],
+		i [3],
+		i [4],
+		i [5],
+	]
+}

src/client.rs

@@ -165,7 +165,7 @@ fn load_config_file () -> ConfigFile {
 	
 	if let Some (proj_dirs) = find_project_dirs () {
 		let mut ini = Ini::new_cs ();
-		let path = proj_dirs.config_dir ().join ("client.ini");
+		let path = proj_dirs.config_local_dir ().join ("client.ini");
 		if ini.load (&path).is_ok () {
 			let map_ref = ini.get_map_ref ();
 			if let Some (x) = map_ref.get ("nicknames") {

src/main.rs

@@ -1,6 +1,7 @@
 use prelude::*;
 
 pub mod app_common;
+mod avalanche;
 mod client;
 mod ip;
 pub mod message;
@@ -31,6 +32,7 @@ async fn async_main () -> Result <(), AppError> {
 		Some ("--version") => println! ("lookaround v{}", LOOKAROUND_VERSION),
 		Some ("client") => client::client (args).await?,
 		Some ("config") => config (),
+		Some ("debug-avalanche") => avalanche::debug (),
 		Some ("find-nick") => client::find_nick (args).await?,
 		Some ("my-ips") => my_ips ()?,
 		Some ("server") => server::server (args).await?,
@@ -42,7 +44,7 @@ async fn async_main () -> Result <(), AppError> {
 
 fn config () {
 	if let Some (proj_dirs) = ProjectDirs::from ("", "ReactorScram", "LookAround") {
-		println! ("Using config dir {:?}", proj_dirs.config_dir ());
+		println! ("Using config dir {:?}", proj_dirs.config_local_dir ());
 	}
 	else {
 		println! ("Can't detect config dir.");

src/server.rs

@@ -41,7 +41,7 @@ fn configure <I: Iterator <Item=String>> (mut args: I) -> Result <Params, AppErr
 	
 	if let Some (proj_dirs) = find_project_dirs () {
 		let mut ini = Ini::new_cs ();
-		let path = proj_dirs.config_dir ().join ("server.ini");
+		let path = proj_dirs.config_local_dir ().join ("server.ini");
 		if ini.load (&path).is_ok () {
 			if let Some (x) = ini.get ("server", "nickname") {
 				nickname = x;

vendored/directories

@@ -0,0 +1 @@
+Subproject commit 6b95e6319cb69933c07dba98e6af26d7145e0bd9