From f970985bc35ade50371a9299ad580d96ad04e979 Mon Sep 17 00:00:00 2001
From: Jeffrey Altman <jaltman@secure-endpoints.com>
Date: Sat, 5 Jan 2008 17:55:20 +0000
Subject: [PATCH] windows-vista-network-change-20080105

LICENSE MIT

After a network change, test to see if the desired LAN adapter to bind
the Netbios Name to has changed.  If so, stop the Netbios Network and
restart with the new LAN adapter.

This can happen on Vista after a suspend if the service wakes up before
the Loopback adapter re-initializes.
---
 src/WINNT/afsd/cm_daemon.c |  1 +
 src/WINNT/afsd/smb.c       | 24 +++++++++++++++++++++++-
 src/WINNT/afsd/smb.h       |  1 +
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/WINNT/afsd/cm_daemon.c b/src/WINNT/afsd/cm_daemon.c
index f708b8bc2..86b23fa66 100644
--- a/src/WINNT/afsd/cm_daemon.c
+++ b/src/WINNT/afsd/cm_daemon.c
@@ -69,6 +69,7 @@ void cm_IpAddrDaemon(long parm)
         thrd_SetEvent(cm_IPAddrDaemon_ShutdownEvent);
         Result = NotifyAddrChange(NULL,NULL);
         if (Result == NO_ERROR && daemon_ShutdownFlag == 0) {
+            smb_LanAdapterChange();
             thrd_ResetEvent(cm_IPAddrDaemon_ShutdownEvent);
 	    Sleep(2500);
             if (daemon_ShutdownFlag == 0) {
diff --git a/src/WINNT/afsd/smb.c b/src/WINNT/afsd/smb.c
index 3059ee272..acfd8559d 100644
--- a/src/WINNT/afsd/smb.c
+++ b/src/WINNT/afsd/smb.c
@@ -60,7 +60,7 @@ osi_rwlock_t smb_globalLock;
 osi_rwlock_t smb_rctLock;
 osi_mutex_t  smb_ListenerLock;
  
-char smb_LANadapter;
+char smb_LANadapter = -1;
 unsigned char smb_sharename[NCBNAMSZ+1] = {0};
 
 BOOL isGateway = FALSE;
@@ -8321,6 +8321,28 @@ void smb_Listener(void *parmp)
     FreeNCB(ncbp);
 }
 
+
+void smb_LanAdapterChange(void) {
+    lana_number_t lanaNum;
+    BOOL          bGateway;
+    char          NetbiosName[MAX_NB_NAME_LENGTH] = "";
+    int           change = 0;
+
+    if (SUCCEEDED(lana_GetUncServerNameEx(NetbiosName, &lanaNum, &bGateway, 
+                                                  LANA_NETBIOS_NAME_FULL))) {
+        if (smb_LANadapter != lanaNum ||
+            isGateway != bGateway ||
+            strcmp(cm_NetbiosName, NetbiosName))
+            change = 1;
+    } 
+
+    if (change) {
+        afsi_log("Lan Adapter Change detected");
+        smb_StopListeners();
+        smb_RestartListeners();
+    }
+}
+
 /* initialize Netbios */
 int smb_NetbiosInit(void)
 {
diff --git a/src/WINNT/afsd/smb.h b/src/WINNT/afsd/smb.h
index 145dfd108..3a884be1c 100644
--- a/src/WINNT/afsd/smb.h
+++ b/src/WINNT/afsd/smb.h
@@ -734,6 +734,7 @@ extern void smb_RestartListeners(void);
 extern void smb_StopListeners(void);
 extern void smb_StopListener(NCB *ncbp, int lana);
 extern long smb_IsNetworkStarted(void);
+extern void smb_LanAdapterChange(void);
 
 #define SMB_LISTENER_UNINITIALIZED -1
 #define SMB_LISTENER_STOPPED 0
-- 
2.39.5