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