From f3e96e06b237855889c5d81f45e5bab0debeeded Mon Sep 17 00:00:00 2001
From: Jeff Becker <jeff@i2p.rocks>
Date: Mon, 30 Dec 2019 15:55:56 -0500
Subject: [PATCH] propagate error to client

---
 llarp/messages/relay_commit.cpp | 3 +++
 llarp/path/path_context.cpp     | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/llarp/messages/relay_commit.cpp b/llarp/messages/relay_commit.cpp
index 1de8ff417..1c744d60d 100644
--- a/llarp/messages/relay_commit.cpp
+++ b/llarp/messages/relay_commit.cpp
@@ -259,6 +259,9 @@ namespace llarp
         if(self->context->CheckPathLimitHitByIP(self->fromAddr))
         {
           llarp::LogError("client path build limited ", self->hop->info);
+          OnForwardLRCMResult(self->context->Router(), self->hop->info.rxID,
+                              self->hop->info.downstream, self->hop->pathKey,
+                              SendStatus::Congestion);
           self->hop = nullptr;
           return;
         }
diff --git a/llarp/path/path_context.cpp b/llarp/path/path_context.cpp
index 3f032cd6d..249a58dc3 100644
--- a/llarp/path/path_context.cpp
+++ b/llarp/path/path_context.cpp
@@ -36,7 +36,10 @@ namespace llarp
     PathContext::CheckPathLimitHitByIP(const llarp::Addr& ip)
     {
       llarp::Addr remote = ip;
+      // set port to zero
       remote.port(0);
+      // try inserting remote address by ip into decaying hash set
+      // if it cannot insert it has hit a limit
       return not m_PathLimits.Insert(remote);
     }