From 08bb6f4ed48359aedd869450b99799b9c734084b Mon Sep 17 00:00:00 2001
From: Cory Fields <cory-nospam-@coryfields.com>
Date: Thu, 2 Feb 2017 14:33:41 -0500
Subject: [PATCH] net: log an error rather than asserting if send version is
 misused

Also cleaned up the comments and moved from the header to the .cpp so that
logging headers aren't needed from net.h
---
 src/net.cpp | 27 +++++++++++++++++++++++++++
 src/net.h   | 21 ++-------------------
 2 files changed, 29 insertions(+), 19 deletions(-)

diff --git a/src/net.cpp b/src/net.cpp
index 19358dd5b..db914096f 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -689,6 +689,33 @@ bool CNode::ReceiveMsgBytes(const char *pch, unsigned int nBytes, bool& complete
     return true;
 }
 
+void CNode::SetSendVersion(int nVersionIn)
+{
+    // Send version may only be changed in the version message, and
+    // only one version message is allowed per session. We can therefore
+    // treat this value as const and even atomic as long as it's only used
+    // once a version message has been successfully processed. Any attempt to
+    // set this twice is an error.
+    if (nSendVersion != 0) {
+        error("Send version already set for node: %i. Refusing to change from %i to %i", id, nSendVersion, nVersionIn);
+    } else {
+        nSendVersion = nVersionIn;
+    }
+}
+
+int CNode::GetSendVersion() const
+{
+    // The send version should always be explicitly set to
+    // INIT_PROTO_VERSION rather than using this value until SetSendVersion
+    // has been called.
+    if (nSendVersion == 0) {
+        error("Requesting unset send version for node: %i. Using %i", id, INIT_PROTO_VERSION);
+        return INIT_PROTO_VERSION;
+    }
+    return nSendVersion;
+}
+
+
 int CNetMessage::readHeader(const char *pch, unsigned int nBytes)
 {
     // copy data to temporary parsing buffer
diff --git a/src/net.h b/src/net.h
index 05f178f9c..1e3033785 100644
--- a/src/net.h
+++ b/src/net.h
@@ -723,25 +723,8 @@ public:
     {
         return nRecvVersion;
     }
-    void SetSendVersion(int nVersionIn)
-    {
-        // Send version may only be changed in the version message, and
-        // only one version message is allowed per session. We can therefore
-        // treat this value as const and even atomic as long as it's only used
-        // once the handshake is complete. Any attempt to set this twice is an
-        // error.
-        assert(nSendVersion == 0);
-        nSendVersion = nVersionIn;
-    }
-
-    int GetSendVersion() const
-    {
-        // The send version should always be explicitly set to
-        // INIT_PROTO_VERSION rather than using this value until the handshake
-        // is complete.
-        assert(nSendVersion != 0);
-        return nSendVersion;
-    }
+    void SetSendVersion(int nVersionIn);
+    int GetSendVersion() const;
 
     CNode* AddRef()
     {