From c89cc290fbc6d53040fc8abc6fc0b0cb637beee9 Mon Sep 17 00:00:00 2001
From: Attila Molnar <attilamolnar@hush.com>
Date: Tue, 3 Nov 2015 13:13:00 +0100
Subject: [PATCH] Move already sent id rollover handling and static
 LocalUser::already_sent_id into UserManager

---
 include/usermanager.h |  5 +++++
 include/users.h       |  1 -
 src/usermanager.cpp   | 16 +++++++++++++---
 src/users.cpp         |  2 --
 4 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/include/usermanager.h b/include/usermanager.h
index 605b841bb..670e51dd5 100644
--- a/include/usermanager.h
+++ b/include/usermanager.h
@@ -56,6 +56,11 @@ class CoreExport UserManager : public fakederef<UserManager>
 	 */
 	LocalList local_users;
 
+	/** Last used already sent id, used when sending messages to neighbors to help determine whether the message has
+	 * been sent to a particular user or not. See User::ForEachNeighbor() for more info.
+	 */
+	already_sent_t already_sent_id;
+
  public:
 	/** Constructor, initializes variables
 	 */
diff --git a/include/users.h b/include/users.h
index 03540018b..fa346a329 100644
--- a/include/users.h
+++ b/include/users.h
@@ -720,7 +720,6 @@ class CoreExport LocalUser : public User, public insp::intrusive_list_node<Local
 	 */
 	unsigned int CommandFloodPenalty;
 
-	static already_sent_t already_sent_id;
 	already_sent_t already_sent;
 
 	/** Check if the user matches a G or K line, and disconnect them if they do.
diff --git a/src/usermanager.cpp b/src/usermanager.cpp
index c593e149f..d81b83d20 100644
--- a/src/usermanager.cpp
+++ b/src/usermanager.cpp
@@ -49,7 +49,8 @@ namespace
 }
 
 UserManager::UserManager()
-	: unregistered_count(0)
+	: already_sent_id(0)
+	, unregistered_count(0)
 {
 }
 
@@ -281,7 +282,6 @@ void UserManager::ServerNoticeAll(const char* text, ...)
 void UserManager::GarbageCollect()
 {
 	// Reset the already_sent IDs so we don't wrap it around and drop a message
-	LocalUser::already_sent_id = 0;
 	for (LocalList::const_iterator i = local_users.begin(); i != local_users.end(); ++i)
 		(**i).already_sent = 0;
 }
@@ -371,5 +371,15 @@ void UserManager::DoBackgroundUserStuff()
 
 already_sent_t UserManager::NextAlreadySentId()
 {
-	return ++LocalUser::already_sent_id;
+	if (++already_sent_id == 0)
+	{
+		// Wrapped around, reset the already_sent ids of all users
+		already_sent_id = 1;
+		for (LocalList::iterator i = local_users.begin(); i != local_users.end(); ++i)
+		{
+			LocalUser* user = *i;
+			user->already_sent = 0;
+		}
+	}
+	return already_sent_id;
 }
diff --git a/src/users.cpp b/src/users.cpp
index 258544312..93fd8d065 100644
--- a/src/users.cpp
+++ b/src/users.cpp
@@ -26,8 +26,6 @@
 #include "inspircd.h"
 #include "xline.h"
 
-already_sent_t LocalUser::already_sent_id = 0;
-
 bool User::IsNoticeMaskSet(unsigned char sm)
 {
 	if (!isalpha(sm))
-- 
2.39.2