UPGRADE_NSPR_RELEASE This is a temporary change to the nspr code in m…

…ozilla-central. We believe we have identified a fix to TCP Fast open feature crashes. We would like to verify the fix before making changes in nspr and investing time in doing a proper fix in nspr. The issue has been discussed over e-mails and this push is justifiable before commiitting changes to nspr. Overwriting this push by a new nspr release will not break mozilla-central it will only disable the TCP fast open feature. Patch has been reviewed in bug 1384633. r=mcmanus r=:kaie: r=mayhemer a=jduell a=mcmanus

nsprpub/pr/include/private/pprio.h

@@ -237,6 +237,19 @@ NSPR_API(PRStatus) PR_NT_CancelIo(PRFileDesc *fd);
 
 #endif /* WIN32 */
 
+/* FUNCTION: PR_FileDesc2PlatformOverlappedIOHandle
+** DESCRIPTION:
+** This functionality is only available on windows. Some windows operation use
+** asynchronous (call overlapped) io. One of them is ConnectEx. NSPR uses
+** ConnectEx for enabling TCP Fast Open.
+** This function returns an OVERLAPPED structure associated with ConnectEx call.
+** If ConnectEx has not been called or the io has already finished, the
+** function will return PR_INVALID_ARGUMENT_ERROR.
+** PRFileDesc continues to be owner of the structure and the structure must not
+** be destroyed.
+*/
+NSPR_API(PRStatus) PR_FileDesc2PlatformOverlappedIOHandle(PRFileDesc *fd, void **ol);
+
 PR_END_EXTERN_C
 
 #endif /* pprio_h___ */

nsprpub/pr/src/io/prsocket.c

@@ -1666,6 +1666,33 @@ PR_ChangeFileDescNativeHandle(PRFileDesc *fd, PROsfd handle)
 		fd->secret->md.osfd = handle;
 }
 
+/* Expose OVERLAPPED if present. OVERLAPPED is implemented only on WIN95. */
+PR_IMPLEMENT(PRStatus)
+PR_FileDesc2PlatformOverlappedIOHandle(PRFileDesc *fd, void **ol)
+{
+#if defined(_WIN64) && defined(WIN95)
+    *ol = NULL;
+    if (fd) {
+        fd = PR_GetIdentitiesLayer(fd, PR_NSPR_IO_LAYER);
+    }
+    if (!fd) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+    if (!fd->secret->overlappedActive) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+    *ol = &fd->secret->ol;
+    return PR_SUCCESS;
+#else
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return PR_FAILURE;
+#endif
+}
+
 /*
 ** Select compatibility
 **

nsprpub/pr/src/nspr.def

@@ -462,3 +462,7 @@ EXPORTS ;-
 		PR_DuplicateEnvironment;
 		PR_GetEnvSecure;
 ;+} NSPR_4.10.3;
+;+NSPR_4.16 {
+;+      global:
+		PR_FileDesc2PlatformOverlappedIOHandle;
+;+} NSPR_4.15;

nsprpub/pr/src/pthreads/ptio.c

@@ -4744,6 +4744,14 @@ PR_IMPLEMENT(PRInt32) PR_FileDesc2NativeHandle(PRFileDesc *bottom)
     return osfd;
 }  /* PR_FileDesc2NativeHandle */
 
+/* Expose OVERLAPPED if present. OVERLAPPED is implemented only on WIN95. */
+PR_IMPLEMENT(PRStatus)
+PR_FileDesc2PlatformOverlappedIOHandle(PRFileDesc *fd, void **ol)
+{
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return PR_FAILURE;
+}
+
 PR_IMPLEMENT(void) PR_ChangeFileDescNativeHandle(PRFileDesc *fd,
     PRInt32 handle)
 {