From 7b79cbd722d35b8113d5136b06d4a8e5fd569fc6 Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <stick@gk2.sk>
Date: Fri, 31 Jul 2015 18:05:42 +0200
Subject: limit total length of user agent comments

Reworked-By: Wladimir J. van der Laan <laanwj@gmail.com>
---
 src/init.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/init.cpp')

diff --git a/src/init.cpp b/src/init.cpp
index a03571c31..91519e293 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1018,6 +1018,13 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
 
     RegisterNodeSignals(GetNodeSignals());
 
+    // format user agent, check total size
+    strSubVersion = FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, mapMultiArgs.count("-uacomment") ? mapMultiArgs["-uacomment"] : std::vector<string>());
+    if (strSubVersion.size() > MAX_SUBVERSION_LENGTH) {
+        return InitError(strprintf("Total length of network version string %i exceeds maximum of %i characters. Reduce the number and/or size of uacomments.",
+            strSubVersion.size(), MAX_SUBVERSION_LENGTH));
+    }
+
     if (mapArgs.count("-onlynet")) {
         std::set<enum Network> nets;
         BOOST_FOREACH(const std::string& snet, mapMultiArgs["-onlynet"]) {
-- 
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