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Re: [RFC] automatically retrying network connections

From: Robert Pluim
Subject: Re: [RFC] automatically retrying network connections
Date: Sun, 22 Jul 2018 16:08:26 +0200

Lars Ingebrigtsen <address@hidden> writes:

> I was thinking that the `nsm-verify-connection' call sites would
> reconnect that function said "go ahead" and the process was dead.  Which
> is basically if it returns non-nil, I guess, so the return value of that
> function doesn't have to change.

Is this the kind of change youʼre thinking of?

diff --git i/lisp/net/network-stream.el w/lisp/net/network-stream.el
index a0589e25a4..dbaf719f41 100644
--- i/lisp/net/network-stream.el
+++ w/lisp/net/network-stream.el
@@ -383,7 +383,7 @@ network-stream-get-response
 (declare-function open-tls-stream "tls" (name buffer host port))
-(defun network-stream-open-tls (name buffer host service parameters)
+(defun network-stream-open-tls (name buffer host service parameters &optional 
   (with-current-buffer buffer
     (let* ((start (point-max))
@@ -398,10 +398,14 @@ network-stream-open-tls
         ;; Check certificate validity etc.
         (when (and (gnutls-available-p) stream)
           (setq stream (nsm-verify-connection stream host service)))
-        (if (null stream)
-            (list nil nil nil 'plain)
+        (cond ((null stream)
+               (list nil nil nil 'plain))
               ;; If we're using tls.el, we have to delete the output from
               ;; openssl/gnutls-cli.
+              ((and (not retry) (not (process-live-p)))
+               (message "Initial connect failed, retrying")
+               (network-stream-open-tls name buffer host service parameters t))
+              (t
                (when (and (not (gnutls-available-p))
                  (network-stream-get-response stream start eoc)
@@ -415,7 +419,7 @@ network-stream-open-tls
                  (list stream
                        (network-stream-get-response stream start eoc)
                        (network-stream-command stream capability-command 
-                  'tls)))))))
+                  'tls))))))))
 (declare-function format-spec "format-spec" (format spec))
 (declare-function format-spec-make "format-spec" (&rest pairs))

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