From 9067d816e5797676004ae50babb262dc4ca702e1 Mon Sep 17 00:00:00 2001
From: brain <brain@e03df62e-2008-0410-955e-edbf42e46eb7>
Date: Tue, 24 May 2005 17:10:19 +0000
Subject: Added extra code to notify mainloop when the iterator has been
 mangled (e.g. by netsplit quits)

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@1499 e03df62e-2008-0410-955e-edbf42e46eb7
---
 src/connection.cpp |  3 ++-
 src/inspircd.cpp   | 15 +++++++++++++--
 src/servers.cpp    |  7 +++++++
 3 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/src/connection.cpp b/src/connection.cpp
index f246a2dac..30a961e96 100644
--- a/src/connection.cpp
+++ b/src/connection.cpp
@@ -32,7 +32,7 @@ using namespace std;
 #include "inspstring.h"
 #include "helperfuncs.h"
 
-
+extern bool has_been_netsplit;
 extern std::vector<Module*> modules;
 extern std::vector<ircd_module*> factory;
 
@@ -200,6 +200,7 @@ bool ircd_connector::CheckPing()
 				this->CloseConnection();
 				this->SetState(STATE_DISCONNECTED);
 				WriteOpers("*** Ping timeout on link to %s (more routes may remain)",this->GetServerName().c_str());
+				has_been_netsplit = true;
 				return false;
 			}
 		}
diff --git a/src/inspircd.cpp b/src/inspircd.cpp
index f11070d07..6ee535cd9 100644
--- a/src/inspircd.cpp
+++ b/src/inspircd.cpp
@@ -119,6 +119,8 @@ int kq, lkq, skq;
 int ep, lep, sep;
 #endif
 
+bool has_been_netsplit = false;
+
 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
 typedef nspace::hash_map<in_addr,string*, nspace::hash<in_addr>, irc::InAddr_HashComp> address_cache;
@@ -1742,6 +1744,7 @@ void DoSplitEveryone()
 			}
 		}
 	}
+	has_been_netsplit = true;
 }
 
 
@@ -2341,6 +2344,7 @@ void DoSplit(const char* params)
 			}
 		}
 	}
+	has_been_netsplit = true;
 }
 
 // removes a server. Will NOT remove its users!
@@ -2940,6 +2944,7 @@ int InspIRCd(char** argv, int argc)
 			msgs.clear();
 			while ((me[x]) && (me[x]->RecvPacket(msgs, tcp_host, sums))) // returns 0 or more lines (can be multiple lines!)
 			{
+				has_been_netsplit = false;
 				for (int ctr = 0; ctr < msgs.size(); ctr++)
 				{
 					strlcpy(tcp_msg,msgs[ctr].c_str(),MAXBUF);
@@ -2974,8 +2979,14 @@ int InspIRCd(char** argv, int argc)
 						goto label;
 					}
 				}
-                		        sums.clear();	// we're done, clear the list for the next operation
-		                        msgs.clear();
+               		        sums.clear();	// we're done, clear the list for the next operation
+	                        msgs.clear();
+				// theres been a netsplit, its unsafe to mess with the iterators!
+				if (has_been_netsplit)
+				{
+					log(DEBUG,"Iterator modified, bailing");
+					goto label;
+				}
 			}
 		}
 	
diff --git a/src/servers.cpp b/src/servers.cpp
index ff5f40a68..a791d3557 100644
--- a/src/servers.cpp
+++ b/src/servers.cpp
@@ -36,8 +36,11 @@ using namespace std;
 
 extern time_t TIME;
 extern int MaxConn;
+
 extern serverrec* me[32];
 
+extern bool has_been_netsplit;
+
 std::deque<std::string> xsums;
 
 serverrec::serverrec()
@@ -308,6 +311,7 @@ void serverrec::FlushWriteBuffers()
 					WriteOpers("*** Server %s is no longer routable, disconnecting.",this->connectors[i].GetServerName().c_str());
 					DoSplit(this->connectors[i].GetServerName().c_str());
 				}
+				has_been_netsplit = true;
 			}
 		}
                 if (this->connectors[i].HasBufferedOutput())
@@ -323,6 +327,7 @@ void serverrec::FlushWriteBuffers()
                                         WriteOpers("*** Server %s is no longer routable, disconnecting.",this->connectors[i].GetServerName().c_str());
                                         DoSplit(this->connectors[i].GetServerName().c_str());
                                 }
+				has_been_netsplit = true;
 			}
                 }
 	}
@@ -457,6 +462,7 @@ bool serverrec::RecvPacket(std::deque<std::string> &messages, char* recvhost,std
                 	                        WriteOpers("*** Server %s is no longer routable, disconnecting.",this->connectors[i].GetServerName().c_str());
         	                                DoSplit(this->connectors[i].GetServerName().c_str());
 	                                }
+					has_been_netsplit = true;
                                 }
                         }
                         int pushed = 0;
@@ -472,6 +478,7 @@ bool serverrec::RecvPacket(std::deque<std::string> &messages, char* recvhost,std
                 	                        WriteOpers("*** Server %s is no longer routable, disconnecting.",this->connectors[i].GetServerName().c_str());
         	                                DoSplit(this->connectors[i].GetServerName().c_str());
 	                                }
+					has_been_netsplit = true;
 				}
                                 if (this->connectors[i].BufferIsComplete())
                                 {
-- 
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