From 3764dec36c815267174951a4c64e17c07ee6302f Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Sat, 26 Mar 2016 18:58:00 +0100
Subject: [PATCH] Keep addrman's nService bits consistent with outbound
 observations

---
 src/addrman.cpp | 18 ++++++++++++++++++
 src/addrman.h   | 11 +++++++++++
 src/main.cpp    |  4 ++++
 3 files changed, 33 insertions(+)

diff --git a/src/addrman.cpp b/src/addrman.cpp
index 00f6fe99e0..d1e98d8ac0 100644
--- a/src/addrman.cpp
+++ b/src/addrman.cpp
@@ -502,6 +502,24 @@ void CAddrMan::Connected_(const CService& addr, int64_t nTime)
         info.nTime = nTime;
 }
 
+void CAddrMan::SetServices_(const CService& addr, uint64_t nServices)
+{
+    CAddrInfo* pinfo = Find(addr);
+
+    // if not found, bail out
+    if (!pinfo)
+        return;
+
+    CAddrInfo& info = *pinfo;
+
+    // check whether we are talking about the exact same CService (including same port)
+    if (info != addr)
+        return;
+
+    // update info
+    info.nServices = nServices;
+}
+
 int CAddrMan::RandomInt(int nMax){
     return GetRandInt(nMax);
 }
diff --git a/src/addrman.h b/src/addrman.h
index c5923e9417..7e36e2228f 100644
--- a/src/addrman.h
+++ b/src/addrman.h
@@ -256,6 +256,9 @@ protected:
     //! Mark an entry as currently-connected-to.
     void Connected_(const CService &addr, int64_t nTime);
 
+    //! Update an entry's service bits.
+    void SetServices_(const CService &addr, uint64_t nServices);
+
 public:
     /**
      * serialized format:
@@ -589,6 +592,14 @@ public:
         }
     }
 
+    void SetServices(const CService &addr, uint64_t nServices)
+    {
+        LOCK(cs);
+        Check();
+        SetServices_(addr, nServices);
+        Check();
+    }
+
 };
 
 #endif // BITCOIN_ADDRMAN_H
diff --git a/src/main.cpp b/src/main.cpp
index 6092e7a12e..ac89945bf2 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4612,6 +4612,10 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
         CAddress addrFrom;
         uint64_t nNonce = 1;
         vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
+        if (!pfrom->fInbound)
+        {
+            addrman.SetServices(pfrom->addr, pfrom->nServices);
+        }
         if (pfrom->nVersion < MIN_PEER_PROTO_VERSION)
         {
             // disconnect from peers older than this proto version