From 14da945d5d51f59706dc9a5d6552bb9baab34c7c Mon Sep 17 00:00:00 2001
From: meep-eep <meep-eep@8092fc87-c524-0410-9efc-e669fe64eaf9>
Date: Wed, 6 Dec 2006 03:56:34 +0000
Subject: [PATCH] Test minimum UQM version in Netplay.

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@2572 8092fc87-c524-0410-9efc-e669fe64eaf9
---
 sc2/ChangeLog                            |  1 +
 sc2/src/sc2code/netplay/netplay.h        |  6 +++-
 sc2/src/sc2code/netplay/packethandlers.c | 38 ++++++++++++++++++++++++
 3 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/sc2/ChangeLog b/sc2/ChangeLog
index be6cd969d..3879208b3 100644
--- a/sc2/ChangeLog
+++ b/sc2/ChangeLog
@@ -1,4 +1,5 @@
 Changes towards version 0.6:
+- Validate UQM version of either side of a Netplay game - SvdB
 - Better abort and disconnect handling for Netplay - SvdB
 - Menu sounds in Setup track rest of game (#922), from Nic - Michael
 - Shifted the Mouse Error to a Popup Window, moved the message to
diff --git a/sc2/src/sc2code/netplay/netplay.h b/sc2/src/sc2code/netplay/netplay.h
index c7056ab69..4e2816bed 100644
--- a/sc2/src/sc2code/netplay/netplay.h
+++ b/sc2/src/sc2code/netplay/netplay.h
@@ -25,7 +25,11 @@
 #define NETPLAY_FULL  2
 
 #define NETPLAY_PROTOCOL_VERSION_MAJOR 0
-#define NETPLAY_PROTOCOL_VERSION_MINOR 2
+#define NETPLAY_PROTOCOL_VERSION_MINOR 3
+
+#define NETPLAY_MIN_UQM_VERSION_MAJOR 0
+#define NETPLAY_MIN_UQM_VERSION_MINOR 5
+#define NETPLAY_MIN_UQM_VERSION_PATCH 4
 
 #define NETPLAY_DEBUG
 		/* Extra debugging for netplay */
diff --git a/sc2/src/sc2code/netplay/packethandlers.c b/sc2/src/sc2code/netplay/packethandlers.c
index 5dbe19c0c..857baf8e9 100644
--- a/sc2/src/sc2code/netplay/packethandlers.c
+++ b/sc2/src/sc2code/netplay/packethandlers.c
@@ -57,6 +57,27 @@ testNetState(bool condition, PacketType type) {
 	return condition;
 }
 
+static int
+versionCompare(int major1, int minor1, int patch1,
+		int major2, int minor2, int patch2) {
+	if (major1 < major2)
+		return -1;
+	if (major1 > major2)
+		return 1;
+
+	if (minor1 < minor2)
+		return -1;
+	if (minor1 > minor2)
+		return 1;
+
+	if (patch1 < patch2)
+		return -1;
+	if (patch1 > patch2)
+		return 1;
+
+	return 0;
+}
+
 int
 PacketHandler_Init(NetConnection *conn, const Packet_Init *packet) {
 	if (conn->stateFlags.reset.localReset)
@@ -72,12 +93,29 @@ PacketHandler_Init(NetConnection *conn, const Packet_Init *packet) {
 	
 	if (packet->protoVersion.major != NETPLAY_PROTOCOL_VERSION_MAJOR ||
 			packet->protoVersion.minor != NETPLAY_PROTOCOL_VERSION_MINOR) {
+		sendAbort (conn, AbortReason_versionMismatch);
+		abortFeedback(conn->player, AbortReason_versionMismatch);
 		log_add(log_Error, "Protocol version %d.%d not supported.\n",
 				packet->protoVersion.major, packet->protoVersion.minor);
 		errno = ENOSYS;
 		return -1;
 	}
 
+	if (versionCompare(packet->uqmVersion.major, packet->uqmVersion.minor,
+			packet->uqmVersion.patch, NETPLAY_MIN_UQM_VERSION_MAJOR,
+			NETPLAY_MIN_UQM_VERSION_MINOR, NETPLAY_MIN_UQM_VERSION_PATCH)
+			< 0) {
+		sendAbort (conn, AbortReason_versionMismatch);
+		abortFeedback(conn->player, AbortReason_versionMismatch);
+		log_add(log_Error, "Remote side is running a version of UQM that "
+				"is too old (%d.%d.%d; %d.%d.%d is required).\n",
+				packet->uqmVersion.major, packet->uqmVersion.minor,
+				packet->uqmVersion.patch, NETPLAY_MIN_UQM_VERSION_MAJOR,
+				NETPLAY_MIN_UQM_VERSION_MINOR, NETPLAY_MIN_UQM_VERSION_PATCH);
+		errno = ENOSYS;
+		return -1;
+	}
+
 	Netplay_remoteReady(conn);
 	
 	return 0;