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/*
* (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010 by On-Waves
* All Rights Reserved
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <snmp_mtp.h>
#include <osmocore/talloc.h>
static void add_pdu_var(netsnmp_pdu *pdu, const char *mib_name, int id, const char *value)
{
oid oid_name[MAX_OID_LEN];
size_t name_length;
char buf[4096];
buf[4095] = '\0';
snprintf(buf, sizeof(buf)-1, "%s.%d", mib_name, id);
name_length = MAX_OID_LEN;
if (snmp_parse_oid(buf, oid_name, &name_length) == NULL) {
snmp_perror(buf);
return;
}
if (snmp_add_var(pdu, oid_name, name_length, '=', value)) {
snmp_perror(buf);
return;
}
}
static void send_pdu(netsnmp_session *ss, netsnmp_pdu *pdu)
{
int status;
netsnmp_pdu *response;
status = snmp_synch_response(ss, pdu, &response);
if (status == STAT_ERROR) {
snmp_sess_perror("set failed", ss);
} else if (status == STAT_TIMEOUT) {
fprintf(stderr, "Timeout for SNMP.\n");
}
if (response)
snmp_free_pdu(response);
}
static void snmp_mtp_start_c7_datalink(struct snmp_mtp_session *session, int link_id)
{
netsnmp_pdu *pdu;
pdu = snmp_pdu_create(SNMP_MSG_SET);
add_pdu_var(pdu, "PTI-NexusWareC7-MIB::nwc7DatalinkCommand", link_id, "nwc7DatalinkCmdPowerOn");
add_pdu_var(pdu, "PTI-NexusWareC7-MIB::nwc7Mtp2Active", link_id, "true");
send_pdu(session->ss, pdu);
}
static void snmp_mtp_stop_c7_datalink(struct snmp_mtp_session *session, int link_id)
{
netsnmp_pdu *pdu;
pdu = snmp_pdu_create(SNMP_MSG_SET);
add_pdu_var(pdu, "PTI-NexusWareC7-MIB::nwc7Mtp2Active", link_id, "false");
send_pdu(session->ss, pdu);
}
struct snmp_mtp_session *snmp_mtp_session_create(char *host)
{
struct snmp_mtp_session *session = talloc_zero(NULL, struct snmp_mtp_session);
if (!session)
return NULL;
init_snmp("cellmgr_ng");
snmp_sess_init(&session->session);
session->session.peername = host;
session->session.version = SNMP_VERSION_1;
session->session.community = (unsigned char *) "private";
session->session.community_len = strlen((const char *) session->session.community);
session->ss = snmp_open(&session->session);
if (!session->ss) {
snmp_perror("create failure");
snmp_log(LOG_ERR, "Could not connect to the remote.\n");
talloc_free(session);
return NULL;
}
return session;
}
void snmp_mtp_deactivate(struct snmp_mtp_session *session, int index)
{
snmp_mtp_stop_c7_datalink(session, index);
}
void snmp_mtp_activate(struct snmp_mtp_session *session, int index)
{
snmp_mtp_start_c7_datalink(session, index);
}
/**
* This is the easiest way to integrate SNMP without
* introducing threads. It would be nicer if it could
* register a timeout and the fd it wants to have selected
* for reading. We could try to find the fd's it is using
* for the session but there is no difference in performance
*/
void snmp_mtp_poll()
{
int num_fds = 0, block = 0;
fd_set fds;
FD_ZERO(&fds);
struct timeval tv;
int rc;
snmp_select_info(&num_fds, &fds, &tv, &block);
memset(&tv, 0, sizeof(tv));
rc = select(num_fds, &fds, NULL, NULL, &tv);
if (rc == 0)
snmp_timeout();
else
snmp_read(&fds);
}
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