m_spanningtree Don't send needless BURST after introducing a server

Synthesize a BURST after SERVER for 1202 protocol servers if we are not bursting

1 files changed, 14 insertions, 0 deletions

diff --git a/src/modules/m_spanningtree/compat.cpp b/src/modules/m_spanningtree/compat.cpp
index 83ad77414..9f25f251d 100644
--- a/src/modules/m_spanningtree/compat.cpp
+++ b/src/modules/m_spanningtree/compat.cpp
@@ -280,6 +280,15 @@ void TreeSocket::WriteLine(const std::string& original_line)
 
 					line.erase(d, spcolon-d);
 					line.insert(c, " * 0");
+
+					if (burstsent)
+					{
+						WriteLineNoCompat(line);
+
+						// Synthesize a :<newserver> BURST <time> message
+						spcolon = line.find(" :");
+						line = CmdBuilder(line.substr(spcolon-3, 3), "BURST").push_int(ServerInstance->Time()).str();
+					}
 				}
 			}
 			WriteLineNoCompat(line);
@@ -461,6 +470,11 @@ bool TreeSocket::PreProcessOldProtocolMessage(User*& who, std::string& cmd, std:
 		params[1].swap(params[3]);
 		params.erase(params.begin()+2, params.begin()+4);
 	}
+	else if (cmd == "BURST")
+	{
+		// A server is introducing another one, drop unnecessary BURST
+		return false;
+	}
 
 	return true; // Passthru
 }