lib/snmp: ignore packets with the wrong destination IP

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

lib/snmp: ignore packets with the wrong destination IP
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>
31552ac8 · Adam Wujek · Grzegorz Daniluk · 3187c81e · 31552ac8
Commit 31552ac8 authored Jul 29, 2016 by Adam Wujek 💬 Committed by Grzegorz Daniluk Aug 03, 2016
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snmp.c lib/snmp.c +8 -0

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--- a/lib/snmp.c
+++ b/lib/snmp.c
@@ -1403,6 +1403,14 @@ static int snmp_poll(void)
 	if (len <= UDP_END + sizeof(match_array))
 		return 0;

+	/* Check the destination IP of SNMP packets. IP version, protocol and
+	 * port are checked in the function update_rx_queues, so no need to
+	 * check it again */
+	if (check_dest_ip(buf)) {
+		snmp_verbose("wrong destination IP\n");
+		return 0;
+	}
+
 	len = snmp_respond(buf + UDP_END);
 	if (len < 0)
 		return 0;