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diff -up net-snmp-5.7.2/snmplib/snmp_api.c.original net-snmp-5.7.2/snmplib/snmp_api.c
--- net-snmp-5.7.2/snmplib/snmp_api.c.original 2018-01-12 17:46:47.534166712 +0900
+++ net-snmp-5.7.2/snmplib/snmp_api.c 2018-01-12 17:48:09.420911255 +0900
@@ -4974,6 +4974,9 @@ _sess_async_send(void *sessp,
reqid = pdu->reqid;
+ if (0 == reqid && (SNMPERR_SUCCESS == session->s_snmp_errno))
+ ++reqid;
+
/*
* Add to pending requests list if we expect a response.
*/
diff -up net-snmp-5.7.2/snmplib/snmp_client.c.original net-snmp-5.7.2/snmplib/snmp_client.c
--- net-snmp-5.7.2/snmplib/snmp_client.c.original 2018-01-12 17:48:21.814721234 +0900
+++ net-snmp-5.7.2/snmplib/snmp_client.c 2018-01-12 18:33:55.779642445 +0900
@@ -1044,11 +1044,13 @@ snmp_synch_response_cb(netsnmp_session *
ss->callback = pcb;
ss->callback_magic = (void *) state;
- if ((state->reqid = snmp_send(ss, pdu)) == 0) {
+ if (snmp_send(ss, pdu) == 0) {
snmp_free_pdu(pdu);
state->status = STAT_ERROR;
- } else
+ } else {
+ state->reqid = pdu->reqid;
state->waiting = 1;
+ }
while (state->waiting) {
numfds = 0;
@@ -1136,11 +1138,13 @@ snmp_sess_synch_response(void *sessp,
ss->callback = snmp_synch_input;
ss->callback_magic = (void *) state;
- if ((state->reqid = snmp_sess_send(sessp, pdu)) == 0) {
+ if (snmp_sess_send(sessp, pdu) == 0) {
snmp_free_pdu(pdu);
state->status = STAT_ERROR;
- } else
+ } else {
+ state->reqid = pdu->reqid;
state->waiting = 1;
+ }
while (state->waiting) {
numfds = 0;