Description: Fix GnuTLS send/recv when returning GNUTLS_E_AGAIN
 Some values returned from gnutls_record_send() / gnutls_record_recv() indicate
 that the operation could not be done. In such cases, the error should not
 propagate to the caller but be operation should be retried.
 .
 Upstream fixed this issue in 9e382db87bd1703423760bbe104a66e7cdfcf5a6 with a
 lot more changes, so this patch only fix the wrong behavior.
Author: Romain Tartière <romain@blogreen.org>

---
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Origin: <vendor|upstream|other>, <url of original patch>
Bug: <url in upstream bugtracker>
Bug-Debian: https://bugs.debian.org/<bugnumber>
Bug-Ubuntu: https://launchpad.net/bugs/<bugnumber>
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Last-Update: 2023-06-08

--- riemann-c-client-1.10.4.orig/lib/riemann/client/tls-gnutls.c
+++ riemann-c-client-1.10.4/lib/riemann/client/tls-gnutls.c
@@ -202,7 +202,9 @@ _riemann_client_send_message_tls (rieman
   if (!buffer)
     return -errno;
 
-  sent = gnutls_record_send (client->tls.session, buffer, len);
+  do {
+    sent = gnutls_record_send (client->tls.session, buffer, len);
+  } while (sent == GNUTLS_E_AGAIN || sent == GNUTLS_E_INTERRUPTED);
   if (sent < 0 || (size_t)sent != len)
     {
       free (buffer);
@@ -220,7 +222,9 @@ _riemann_client_recv_message_tls (rieman
   ssize_t received;
   riemann_message_t *message;
 
-  received = gnutls_record_recv (client->tls.session, &header, sizeof (header));
+  do {
+    received = gnutls_record_recv (client->tls.session, &header, sizeof (header));
+  } while (received == GNUTLS_E_AGAIN || received == GNUTLS_E_INTERRUPTED);
   if (received != sizeof (header))
     {
       errno = EPROTO;
@@ -230,7 +234,9 @@ _riemann_client_recv_message_tls (rieman
 
   buffer = (uint8_t *) malloc (len);
 
-  received = gnutls_record_recv (client->tls.session, buffer, len);
+  do {
+    received = gnutls_record_recv (client->tls.session, buffer, len);
+  } while (received == GNUTLS_E_AGAIN || received == GNUTLS_E_INTERRUPTED);
   if (received != len)
     {
       free (buffer);