openwrt-packages-dist/net/zerotier/patches/0004-Revert-Do-not-serve-controller-requests-until-init-i.patch

From ab8ececbe70f7c83667d6ebb592fc1df17ad26a4 Mon Sep 17 00:00:00 2001
From: Moritz Warning <moritzwarning@web.de>
Date: Sat, 20 Jan 2018 21:55:52 +0100
Subject: [PATCH] Revert "Do not serve controller requests until init is done."

This reverts commit f4feccc6265cc480b84c85f897b225714072d4ec.
---
 controller/JSONDB.cpp | 20 +++++++-------------
 controller/JSONDB.hpp | 15 +++++++--------
 2 files changed, 14 insertions(+), 21 deletions(-)

diff --git a/controller/JSONDB.cpp b/controller/JSONDB.cpp
index d3e76fc1..007e0fec 100644
--- a/controller/JSONDB.cpp
+++ b/controller/JSONDB.cpp
@@ -26,8 +26,7 @@ static const nlohmann::json _EMPTY_JSON(nlohmann::json::object());
 static const std::map<std::string,std::string> _ZT_JSONDB_GET_HEADERS;
 
 JSONDB::JSONDB(const std::string &basePath) :
-	_basePath(basePath),
-	_ready(false)
+	_basePath(basePath)
 {
 	if ((_basePath.length() > 7)&&(_basePath.substr(0,7) == "http://")) {
 		// TODO: this doesn't yet support IPv6 since bracketed address notiation isn't supported.
@@ -50,7 +49,7 @@ JSONDB::JSONDB(const std::string &basePath) :
 		OSUtils::mkdir(_basePath.c_str());
 		OSUtils::lockDownFile(_basePath.c_str(),true); // networks might contain auth tokens, etc., so restrict directory permissions
 	}
-	_ready = _reload(_basePath,std::string());
+	_reload(_basePath,std::string());
 }
 
 bool JSONDB::writeRaw(const std::string &n,const std::string &obj)
@@ -84,13 +83,9 @@ bool JSONDB::put(const std::string &n,const nlohmann::json &obj)
 
 const nlohmann::json &JSONDB::get(const std::string &n)
 {
-	while (!_ready) {
-		Thread::sleep(250);
-		_ready = _reload(_basePath,std::string());
-	}
-
 	if (!_isValidObjectName(n))
 		return _EMPTY_JSON;
+
 	std::map<std::string,_E>::iterator e(_db.find(n));
 	if (e != _db.end())
 		return e->second.obj;
@@ -138,7 +133,7 @@ void JSONDB::erase(const std::string &n)
 	_db.erase(n);
 }
 
-bool JSONDB::_reload(const std::string &p,const std::string &b)
+void JSONDB::_reload(const std::string &p,const std::string &b)
 {
 	if (_httpAddr) {
 		std::string body;
@@ -155,11 +150,11 @@ bool JSONDB::_reload(const std::string &p,const std::string &b)
 							_db[tmp].obj = i.value();
 						}
 					}
-					return true;
 				}
-			} catch ( ... ) {} // invalid JSON, so maybe incomplete request
+			} catch ( ... ) {
+				// TODO: report error?
+			}
 		}
-		return false;
 	} else {
 		std::vector<std::string> dl(OSUtils::listDirectory(p.c_str(),true));
 		for(std::vector<std::string>::const_iterator di(dl.begin());di!=dl.end();++di) {
@@ -169,7 +164,6 @@ bool JSONDB::_reload(const std::string &p,const std::string &b)
 				this->_reload((p + ZT_PATH_SEPARATOR + *di),(b + *di + ZT_PATH_SEPARATOR));
 			}
 		}
-		return true;
 	}
 }
 
diff --git a/controller/JSONDB.hpp b/controller/JSONDB.hpp
index beafbaf5..c19112ed 100644
--- a/controller/JSONDB.hpp
+++ b/controller/JSONDB.hpp
@@ -36,7 +36,6 @@
 #include "../ext/json/json.hpp"
 #include "../osdep/OSUtils.hpp"
 #include "../osdep/Http.hpp"
-#include "../osdep/Thread.hpp"
 
 namespace ZeroTier {
 
@@ -48,6 +47,12 @@ class JSONDB
 public:
 	JSONDB(const std::string &basePath);
 
+	inline void reload()
+	{
+		_db.clear();
+		_reload(_basePath,std::string());
+	}
+
 	bool writeRaw(const std::string &n,const std::string &obj);
 
 	bool put(const std::string &n,const nlohmann::json &obj);
@@ -74,11 +79,6 @@ public:
 	template<typename F>
 	inline void filter(const std::string &prefix,F func)
 	{
-		while (!_ready) {
-			Thread::sleep(250);
-			_ready = _reload(_basePath,std::string());
-		}
-
 		for(std::map<std::string,_E>::iterator i(_db.lower_bound(prefix));i!=_db.end();) {
 			if ((i->first.length() >= prefix.length())&&(!memcmp(i->first.data(),prefix.data(),prefix.length()))) {
 				if (!func(i->first,get(i->first))) {
@@ -94,7 +94,7 @@ public:
 	inline bool operator!=(const JSONDB &db) const { return (!(*this == db)); }
 
 private:
-	bool _reload(const std::string &p,const std::string &b);
+	void _reload(const std::string &p,const std::string &b);
 	bool _isValidObjectName(const std::string &n);
 	std::string _genPath(const std::string &n,bool create);
 
@@ -108,7 +108,6 @@ private:
 	InetAddress _httpAddr;
 	std::string _basePath;
 	std::map<std::string,_E> _db;
-	volatile bool _ready;
 };
 
 } // namespace ZeroTier
-- 
2.15.1