From d36c9222cdf411595cf377bcde6308adc4c30117 Mon Sep 17 00:00:00 2001
From: Net-SNMP Packaging Team <pkg-net-snmp-devel@lists.alioth.debian.org>
Date: Mon, 27 Jun 2022 15:01:26 +0800
Subject: [PATCH] Fix engineID reprobe

Do not probe for engineID when we already know it
Reviewed-by: Craig Small <csmall@debian.org>
Last-Updated: 2019-02-07

Gbp-Pq: Name fix_engineid_reprobe.diff
---
 snmplib/snmpusm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/snmplib/snmpusm.c b/snmplib/snmpusm.c
index 3cfa126..e697c23 100644
--- a/snmplib/snmpusm.c
+++ b/snmplib/snmpusm.c
@@ -3258,6 +3258,11 @@ int usm_discover_engineid(void *slpv, netsnmp_session *session) {
     int status, i;
     struct session_list *slp = (struct session_list *) slpv;
 
+    if (slp->session->securityEngineIDLen != 0) {
+        DEBUGMSGTL(("snmp_api", "engineID already known, skipping probe\n"));
+        return SNMPERR_SUCCESS;
+    }
+
     if (usm_build_probe_pdu(&pdu) != 0) {
         DEBUGMSGTL(("snmp_api", "unable to create probe PDU\n"));
         return SNMP_ERR_GENERR;