void snmp_start_read_rssi(char *host) {
struct snmp_pdu *pdu;
struct snmp_session session;
const char *community = "public";
if (oid_rssi_ts1_length == 0 || oid_rssi_ts2_length == 0)
return;
snmp_rssi_received = 0;
if (snmp_session_rssi != NULL) {
snmp_close(snmp_session_rssi);
snmp_session_rssi = NULL;
}
snmp_sess_init(&session);
session.version = SNMP_VERSION_1;
session.peername = strdup(host);
session.community = (unsigned char *)strdup(community);
session.community_len = strlen(community);
session.callback = snmp_get_rssi_cb;
if (!(snmp_session_rssi = snmp_open(&session))) {
console_log("snmp error: error opening session to host %s\n", host);
return;
}
pdu = snmp_pdu_create(SNMP_MSG_GET);
snmp_add_null_var(pdu, oid_rssi_ts1, oid_rssi_ts1_length);
snmp_add_null_var(pdu, oid_rssi_ts2, oid_rssi_ts2_length);
if (!snmp_send(snmp_session_rssi, pdu))
console_log("snmp error: error sending rssi request to host %s\n", host);
free(session.peername);
free(session.community);
}
void
simpleSNMPsend(struct snmp_session *session,
oid *name,
size_t name_length)
{
struct snmp_pdu *pdu;
oid uptime[MAX_OID_LEN];
size_t uptime_length;
/*
* Create PDU for GET request and add object names to request.
*/
pdu = snmp_pdu_create(SNMP_MSG_GET);
/*
* First insert uptime request into PDU.
*/
uptime_length = MAX_OID_LEN;
if (!snmp_parse_oid("system.sysUpTime.0",
uptime, &uptime_length)) {
printf("error parsing oid: system.sysUpTime.0\n");
}
snmp_add_null_var(pdu, uptime, uptime_length);
snmp_add_null_var(pdu, name, name_length);
/*
* Perform the request.
*/
snmp_send(session, pdu);
}
int ups_mib_mgr_get_upsBypassEntry(struct snmp_session *s, upsBypassEntry_t **upsBypassEntry)
{
struct snmp_session *peer;
struct snmp_pdu *request, *response;
struct variable_list *vars;
int status;
request = snmp_pdu_create(SNMP_MSG_GETNEXT);
snmp_add_null_var(request, upsBypassVoltage, sizeof(upsBypassVoltage)/sizeof(oid));
snmp_add_null_var(request, upsBypassCurrent, sizeof(upsBypassCurrent)/sizeof(oid));
snmp_add_null_var(request, upsBypassPower, sizeof(upsBypassPower)/sizeof(oid));
peer = snmp_open(s);
if (!peer) {
return -1;
}
status = snmp_synch_response(peer, request, &response);
if (status != STAT_SUCCESS) {
if (response) snmp_free_pdu(response);
snmp_close(peer);
return -2;
}
*upsBypassEntry = (upsBypassEntry_t *) malloc(sizeof(upsBypassEntry_t));
if (! *upsBypassEntry) {
if (response) snmp_free_pdu(response);
snmp_close(peer);
return -4;
}
for (vars = response->variables; vars; vars = vars->next_variable) {
if (vars->name_length > sizeof(upsBypassVoltage)/sizeof(oid)
&& memcmp(vars->name, upsBypassVoltage, sizeof(upsBypassVoltage)) == 0) {
(*upsBypassEntry)->__upsBypassVoltage = *vars->val.integer;
(*upsBypassEntry)->upsBypassVoltage = &((*upsBypassEntry)->__upsBypassVoltage);
}
if (vars->name_length > sizeof(upsBypassCurrent)/sizeof(oid)
&& memcmp(vars->name, upsBypassCurrent, sizeof(upsBypassCurrent)) == 0) {
(*upsBypassEntry)->__upsBypassCurrent = *vars->val.integer;
(*upsBypassEntry)->upsBypassCurrent = &((*upsBypassEntry)->__upsBypassCurrent);
}
if (vars->name_length > sizeof(upsBypassPower)/sizeof(oid)
&& memcmp(vars->name, upsBypassPower, sizeof(upsBypassPower)) == 0) {
(*upsBypassEntry)->__upsBypassPower = *vars->val.integer;
(*upsBypassEntry)->upsBypassPower = &((*upsBypassEntry)->__upsBypassPower);
}
}
if (response) snmp_free_pdu(response);
if (snmp_close(peer) == 0) {
return -5;
}
return 0;
}
int ups_mib_mgr_get_upsOutput(struct snmp_session *s, upsOutput_t **upsOutput)
{
struct snmp_session *peer;
struct snmp_pdu *request, *response;
struct variable_list *vars;
int status;
request = snmp_pdu_create(SNMP_MSG_GETNEXT);
snmp_add_null_var(request, upsOutputSource, sizeof(upsOutputSource)/sizeof(oid));
snmp_add_null_var(request, upsOutputFrequency, sizeof(upsOutputFrequency)/sizeof(oid));
snmp_add_null_var(request, upsOutputNumLines, sizeof(upsOutputNumLines)/sizeof(oid));
peer = snmp_open(s);
if (!peer) {
return -1;
}
status = snmp_synch_response(peer, request, &response);
if (status != STAT_SUCCESS) {
if (response) snmp_free_pdu(response);
snmp_close(peer);
return -2;
}
*upsOutput = (upsOutput_t *) malloc(sizeof(upsOutput_t));
if (! *upsOutput) {
if (response) snmp_free_pdu(response);
snmp_close(peer);
return -4;
}
for (vars = response->variables; vars; vars = vars->next_variable) {
if (vars->name_length > sizeof(upsOutputSource)/sizeof(oid)
&& memcmp(vars->name, upsOutputSource, sizeof(upsOutputSource)) == 0) {
(*upsOutput)->__upsOutputSource = *vars->val.integer;
(*upsOutput)->upsOutputSource = &((*upsOutput)->__upsOutputSource);
}
if (vars->name_length > sizeof(upsOutputFrequency)/sizeof(oid)
&& memcmp(vars->name, upsOutputFrequency, sizeof(upsOutputFrequency)) == 0) {
(*upsOutput)->__upsOutputFrequency = *vars->val.integer;
(*upsOutput)->upsOutputFrequency = &((*upsOutput)->__upsOutputFrequency);
}
if (vars->name_length > sizeof(upsOutputNumLines)/sizeof(oid)
&& memcmp(vars->name, upsOutputNumLines, sizeof(upsOutputNumLines)) == 0) {
(*upsOutput)->__upsOutputNumLines = *vars->val.integer;
(*upsOutput)->upsOutputNumLines = &((*upsOutput)->__upsOutputNumLines);
}
}
if (response) snmp_free_pdu(response);
if (snmp_close(peer) == 0) {
return -5;
}
return 0;
}
static struct snmp_pdu *
snmp_get_item(char *host, char *community, char *mib_item)
{
struct snmp_session session, *ss;
struct snmp_pdu *request = NULL, *result = NULL;
oid Oid[MAX_OID_LEN];
unsigned int oid_len = MAX_OID_LEN;
/* initialize the SNMP session */
snmp_sess_init(&session);
session.peername = host;
session.community = (uchar_t *)community;
session.community_len = strlen((const char *)session.community);
session.version = SNMP_VERSION_1;
session.retries = 0;
if ((ss = snmp_open(&session)) == NULL)
return (NULL);
/* add the requested data */
if (!read_objid(mib_item, Oid, &oid_len))
snmp_perror(mib_item);
/* initialize the request PDU */
request = snmp_pdu_create(SNMP_MSG_GET);
snmp_add_null_var(request, Oid, oid_len);
(void) snmp_synch_response(ss, request, &result);
snmp_close(ss);
return (result);
}
void prsnmpstr(char *stroid) {
struct snmp_pdu *pdu, *resp;
oid tmp_oid[MAX_OID_LEN];
size_t tmp_oid_len=MAX_OID_LEN;
int stat;
char *tmp;
pdu=snmp_pdu_create(SNMP_MSG_GET);
read_objid(stroid, tmp_oid, &tmp_oid_len);
snmp_add_null_var(pdu, tmp_oid, tmp_oid_len);
stat=snmp_synch_response(ses, pdu, &resp);
if (stat != STAT_SUCCESS || resp->errstat != SNMP_ERR_NOERROR)
perr(resp);
if(resp->variables->val_len && strlen((char *)resp->variables->val.string)) {
tmp=malloc((resp->variables->val_len+1) * sizeof(char));
memcpy(tmp, resp->variables->val.string, resp->variables->val_len);
tmp[resp->variables->val_len]=0;
printf("%s", tmp);
free(tmp);
}
if(resp)
snmp_free_pdu(resp);
}
void prifalias(oid inst) {
struct snmp_pdu *pdu, *resp;
oid tmp_oid[] = { 1,3,6,1,2,1,31,1,1,1,18,0 };
int stat;
char *tmp;
if(!extended) {
fprintf(stderr, "ifalias is only available in eXtended mode\n");
snmp_close(ses);
SOCK_CLEANUP;
exit(1);
}
tmp_oid[11]=inst;
pdu=snmp_pdu_create(SNMP_MSG_GET);
snmp_add_null_var(pdu, tmp_oid, sizeof(tmp_oid)/sizeof(oid));
stat=snmp_synch_response(ses, pdu, &resp);
if (stat != STAT_SUCCESS || resp->errstat != SNMP_ERR_NOERROR)
perr(resp);
if(resp->variables->val_len && strlen((char *)resp->variables->val.string)) {
tmp=malloc((resp->variables->val_len+1) * sizeof(char));
memcpy(tmp, resp->variables->val.string, resp->variables->val_len);
tmp[resp->variables->val_len]=0;
printf(" \"%s\"", tmp);
free(tmp);
}
if(resp)
snmp_free_pdu(resp);
}
uint32_t getcntr32(int dir, oid inst) {
struct snmp_pdu *pdu, *resp;
oid iftable_oid[] = { 1,3,6,1,2,1,2,2,1,0,0 }; // dir=9 ; inst=10
int stat;
uint32_t tmp;
pdu=snmp_pdu_create(SNMP_MSG_GET);
iftable_oid[9]=dir;
iftable_oid[10]=inst;
snmp_add_null_var(pdu, iftable_oid, sizeof(iftable_oid)/sizeof(oid));
stat=snmp_synch_response(ses, pdu, &resp);
if (stat != STAT_SUCCESS || resp->errstat != SNMP_ERR_NOERROR)
perr(resp);
if(resp->variables->type != ASN_COUNTER) {
fprintf(stderr, "\nError: unsupported data type (only 32bit counter is supported in normal mode)\n");
snmp_close(ses);
SOCK_CLEANUP;
exit(1);
}
tmp=resp->variables->val.counter64->high;
if(resp)
snmp_free_pdu(resp);
return tmp;
}
/*
* response handler
*/
int asynch_response(int operation, struct snmp_session *sp, int reqid,
struct snmp_pdu *pdu, void *magic)
{
struct session *host = (struct session *)magic;
struct snmp_pdu *req;
if (operation == NETSNMP_CALLBACK_OP_RECEIVED_MESSAGE) {
if (print_result(STAT_SUCCESS, host->sess, pdu)) {
host->current_oid++; /* send next GET (if any) */
if (host->current_oid->Name) {
req = snmp_pdu_create(SNMP_MSG_GET);
snmp_add_null_var(req, host->current_oid->Oid, host->current_oid->OidLen);
if (snmp_send(host->sess, req))
return 1;
else {
snmp_perror("snmp_send");
snmp_free_pdu(req);
}
}
}
}
else
print_result(STAT_TIMEOUT, host->sess, pdu);
/* something went wrong (or end of variables)
* this host not active any more
*/
active_hosts--;
return 1;
}
/**
* snmp_getn_bulk: Builds and sends a SNMP_BET_BULK pdu using snmp
* @sessp: snmp session
* @bulk_objid: string containing the OID entry.
* @bulk_objid_len: len of OID string
* @bulk_pdu: pointer to the PDU to be created
* @bulk_response: pointer to the response for this PDU request
* @num_repetitions: max OIDs for this request.
* Note: this is the max requested. Actual number returned can be less
* than maximum. That depends on the target snmp agent.
*
* Return value: status from snmp_sess_synch_response(). See snmp_client.h of net-snmp library.
* STAT_SUCCESS
* STAT_ERROR
* STAT_TIMEOUT
*
* Additionally, if status == STAT_SUCCESS, consumer of this routine needs to check for exception
* conditions.
* Possible exception conditions are SNMP_ENDOFMIBVIEW, SNMP_NOSUCHOBJECT, SNMP_NOSUCHINSTANCE
**/
int snmp_getn_bulk( void *sessp,
oid *bulk_objid,
size_t bulk_objid_len,
struct snmp_pdu *bulk_pdu,
struct snmp_pdu **bulk_response,
int num_repetitions )
{
int status;
bulk_pdu = snmp_pdu_create(SNMP_MSG_GETBULK);
bulk_pdu->non_repeaters = 0;
bulk_pdu->max_repetitions = num_repetitions;
snmp_add_null_var(bulk_pdu, bulk_objid, bulk_objid_len);
/* Send the Request out.*/
status = snmp_sess_synch_response(sessp, bulk_pdu, bulk_response);
/*
* Return the status. Consumer of this util has to process the response.
*/
return(status);
}
int
agentx_remove_agentcaps(netsnmp_session * ss,
oid * agent_cap, size_t agent_caplen)
{
netsnmp_pdu *pdu, *response;
if (ss == NULL || !IS_AGENTX_VERSION(ss->version)) {
return 0;
}
pdu = snmp_pdu_create(AGENTX_MSG_REMOVE_AGENT_CAPS);
if (pdu == NULL)
return 0;
pdu->time = 0;
pdu->sessid = ss->sessid;
snmp_add_null_var(pdu, agent_cap, agent_caplen);
if (agentx_synch_response(ss, pdu, &response) != STAT_SUCCESS)
return 0;
if (response->errstat != SNMP_ERR_NOERROR) {
snmp_free_pdu(response);
return 0;
}
snmp_free_pdu(response);
return 1;
}
/* report the value interfaces.ifNumber.0, actually the number of interfaces */
static int snmp_get_ifcount(struct snmp_session *ss) {
int nifaces = -1;
oid ifcount[] = { 1, 3, 6, 1, 2, 1, 2, 1, 0 };
struct snmp_pdu *pdu;
struct snmp_pdu *response = NULL;
int status;
if ((pdu = snmp_pdu_create(SNMP_MSG_GET)) == NULL) {
ifstat_error("snmp_pdu_create: %s", snmp_api_errstring(snmp_errno));
return -1;
}
snmp_add_null_var(pdu, ifcount, sizeof(ifcount) / sizeof(oid));
if ((status = snmp_synch_response(ss, pdu, &response)) != STAT_SUCCESS ||
response->errstat != SNMP_ERR_NOERROR ||
response->variables == NULL ||
response->variables->type != ASN_INTEGER) {
if (status == STAT_SUCCESS)
ifstat_error("snmp: Error: %s", snmp_errstring(response->errstat));
else
ifstat_error("snmpget(interfaces.ifNumber.0): %s", snmp_sess_errstring(ss));
if (response)
snmp_free_pdu(response);
return -1;
}
nifaces = *(response->variables->val.integer);
snmp_free_pdu(response);
if (nifaces < 0)
return -1;
return nifaces;
}
void * snmp_poll ( void * request_details ) {
snmp_request_t* req = (snmp_request_t*)request_details;
struct snmp_session ss, *sp;
struct oid *op;
snmp_sess_init(&ss); /* initialize session */
ss.version = SNMP_VERSION_2c;
ss.peername = req->target_host;
ss.community = req->community;
ss.community_len = strlen(ss.community);
snmp_synch_setup(&ss);
if (!(sp = snmp_open(&ss)))
snmp_perror("snmp_open");
struct snmp_pdu *req2, *resp;
int status;
req = snmp_pdu_create(SNMP_MSG_GET);
snmp_add_null_var(req2, req->oid, strlen(req->oid));
status = snmp_synch_response(sp, req2, &resp);
snmp_free_pdu(resp);
snmp_close(sp);
// Push the results back to the result queue..
pthread_mutex_lock ( &result_lock ) ;
// TODO: create linked array for a result buffer
pthread_mutex_unlock ( &result_lock ) ;
}
void get_snmp(void *precord)
{
snmpRecord *psnmp = (snmpRecord *)precord;
SNMP_INFO *snmpinfo = (SNMP_INFO*)psnmp->dpvt;
if (!(snmpinfo->sess = snmp_open(&snmpinfo->ss))) {
snmp_perror("snmp_open");
};
snmpinfo->getreq = snmp_pdu_create(SNMP_MSG_GET); /* send the first GET */
if (! snmpinfo->getreq) {
snmp_close(snmpinfo->sess); /* cleanup */
}
snmp_add_null_var(snmpinfo->getreq, snmpinfo->oid_info.Oid, snmpinfo->oid_info.OidLen);
if (snmp_send(snmpinfo->sess, snmpinfo->getreq))
hosts++;
else {
snmp_perror("snmp_setsend");
snmp_free_pdu(snmpinfo->getreq);
}
active_hosts();
snmp_close(snmpinfo->sess); /* cleanup */
}
void session_add_null_var(struct snmp_pdu *pdu, const char *name) {
oid anOID[MAX_OID_LEN+1];
size_t anOID_len = MAX_OID_LEN;
get_node(name, anOID, &anOID_len);
snmp_add_null_var(pdu, anOID, anOID_len);
}
/*
* simple synchronous loop
*/
void synchronous (void)
{
struct host *hp;
for (hp = hosts; hp->name; hp++) {
struct snmp_session ss, *sp;
struct oid *op;
snmp_sess_init(&ss); /* initialize session */
ss.version = SNMP_VERSION_2c;
ss.peername = strdup(hp->name);
ss.community = strdup(hp->community);
ss.community_len = strlen(ss.community);
if (!(sp = snmp_open(&ss))) {
snmp_perror("snmp_open");
continue;
}
for (op = oids; op->Name; op++) {
struct snmp_pdu *req, *resp;
int status;
req = snmp_pdu_create(SNMP_MSG_GET);
snmp_add_null_var(req, op->Oid, op->OidLen);
status = snmp_synch_response(sp, req, &resp);
if (!print_result(status, sp, resp)) break;
snmp_free_pdu(resp);
}
snmp_close(sp);
}
}
int snmp_get_bulk( struct snmp_session *ss,
const char *bulk_objid,
struct snmp_pdu *bulk_pdu,
struct snmp_pdu **bulk_response )
{
size_t anOID_len = MAX_OID_LEN;
oid anOID[MAX_OID_LEN];
int status;
/* Create the PDU for theenrty_count data for our request. */
read_objid(bulk_objid, anOID, &anOID_len);
bulk_pdu = snmp_pdu_create(SNMP_MSG_GETBULK);
bulk_pdu->non_repeaters = 0;
bulk_pdu->max_repetitions = NUM_REPITIONS;
snmp_add_null_var(bulk_pdu, anOID, anOID_len);
/* Send the Request out.*/
status = snmp_synch_response(ss, bulk_pdu, bulk_response);
return(status);
}
int
add(netsnmp_pdu *pdu, const char *mibnodename,
oid * index, size_t indexlen)
{
oid base[MAX_OID_LEN];
size_t base_length = MAX_OID_LEN;
memset(base, 0, MAX_OID_LEN * sizeof(oid));
if (!snmp_parse_oid(mibnodename, base, &base_length)) {
snmp_perror(mibnodename);
fprintf(stderr, "couldn't find mib node %s, giving up\n",
mibnodename);
#if HAVE_CURSES_H
endwin();
#endif
exit(1);
}
if (index && indexlen) {
memcpy(&(base[base_length]), index, indexlen * sizeof(oid));
base_length += indexlen;
}
DEBUGMSGTL(("add", "created: "));
DEBUGMSGOID(("add", base, base_length));
DEBUGMSG(("add", "\n"));
snmp_add_null_var(pdu, base, base_length);
return base_length;
}
void asynchronous(void)
{
struct session *hs;
struct host *hp;
/* startup all hosts */
for (hs = sessions, hp = hosts; hp->name; hs++, hp++) {
struct snmp_pdu *req;
struct snmp_session sess;
snmp_sess_init(&sess); /* initialize session */
sess.version = SNMP_VERSION_2c;
sess.peername = strdup(hp->name);
sess.community = strdup(hp->community);
sess.community_len = strlen(sess.community);
sess.callback = asynch_response; /* default callback */
sess.callback_magic = hs;
if (!(hs->sess = snmp_open(&sess))) {
snmp_perror("snmp_open");
continue;
}
hs->current_oid = oids;
req = snmp_pdu_create(SNMP_MSG_GET); /* send the first GET */
snmp_add_null_var(req, hs->current_oid->Oid, hs->current_oid->OidLen);
if (snmp_send(hs->sess, req))
active_hosts++;
else {
snmp_perror("snmp_send");
snmp_free_pdu(req);
}
}
/* loop while any active hosts */
while (active_hosts) {
int fds = 0, block = 1;
fd_set fdset;
struct timeval timeout;
FD_ZERO(&fdset);
snmp_select_info(&fds, &fdset, &timeout, &block);
fds = select(fds, &fdset, NULL, NULL, block ? NULL : &timeout);
if (fds < 0) {
perror("select failed");
exit(1);
}
if (fds)
snmp_read(&fdset);
else
snmp_timeout();
}
/* cleanup */
for (hp = hosts, hs = sessions; hp->name; hs++, hp++) {
if (hs->sess) snmp_close(hs->sess);
}
}
void processSnmpGet(char * oid){
read_objid(oid, id_oid, &id_len);
snmp_add_null_var(pdu, id_oid, id_len);
int status = snmp_synch_response(session_handle, pdu, &response);
for(vars = response->variables; vars; vars = vars->next_variable){
snprint_variable(outbuff, 256, vars->name, vars->name_length, vars);
resultString = strrchr(outbuff, ':');
}
}
int
agentx_register(netsnmp_session * ss, oid start[], size_t startlen,
int priority, int range_subid, oid range_ubound,
int timeout, u_char flags, const char *contextName)
{
netsnmp_pdu *pdu, *response;
DEBUGMSGTL(("agentx/subagent", "registering: "));
DEBUGMSGOIDRANGE(("agentx/subagent", start, startlen, range_subid,
range_ubound));
DEBUGMSG(("agentx/subagent", "\n"));
if (ss == NULL || !IS_AGENTX_VERSION(ss->version)) {
return 0;
}
pdu = snmp_pdu_create(AGENTX_MSG_REGISTER);
if (pdu == NULL) {
return 0;
}
pdu->time = timeout;
pdu->priority = priority;
pdu->sessid = ss->sessid;
pdu->range_subid = range_subid;
if (contextName) {
pdu->flags |= AGENTX_MSG_FLAG_NON_DEFAULT_CONTEXT;
pdu->community = strdup(contextName);
pdu->community_len = strlen(contextName);
}
if (flags & FULLY_QUALIFIED_INSTANCE) {
pdu->flags |= AGENTX_MSG_FLAG_INSTANCE_REGISTER;
}
if (range_subid) {
snmp_pdu_add_variable(pdu, start, startlen, ASN_OBJECT_ID,
(u_char *) start, startlen * sizeof(oid));
pdu->variables->val.objid[range_subid - 1] = range_ubound;
} else {
snmp_add_null_var(pdu, start, startlen);
}
if (agentx_synch_response(ss, pdu, &response) != STAT_SUCCESS) {
DEBUGMSGTL(("agentx/subagent", "registering failed!\n"));
return 0;
}
if (response->errstat != SNMP_ERR_NOERROR) {
snmp_log(LOG_ERR,"registering pdu failed: %d!\n", response->errstat);
snmp_free_pdu(response);
return 0;
}
snmp_free_pdu(response);
DEBUGMSGTL(("agentx/subagent", "registered\n"));
return 1;
}
/** Get current from power supply
*/
double getCurrentMeasurement(HSNMP m_sessp, int channel) {
double value;
struct snmp_pdu* pdu = snmp_pdu_create(SNMP_MSG_GET); // prepare get-request pdu
// for(each GET request to one crate) {
snmp_add_null_var(pdu,oidOutputMeasurementCurrent[channel],lengthOutputMeasurementCurrent[channel]); // generate request data
// } // endfor
struct snmp_pdu* response;
int status = snmp_sess_synch_response(m_sessp,pdu,&response);
/*
* Process the response.
*/
if (status == STAT_SUCCESS && response->errstat == SNMP_ERR_NOERROR) {
/*
* SUCCESS: Print the result variables
*/
struct variable_list *vars;
// debug print
//for(vars = response->variables; vars; vars = vars->next_variable)
// print_variable(vars->name, vars->name_length, vars);
/* manipuate the information ourselves */
for(vars = response->variables; vars; vars = vars->next_variable) {
if (vars->type == ASN_OPAQUE_FLOAT) { // 0x78
value = *vars->val.floatVal;
}
else if (vars->type == ASN_OPAQUE_DOUBLE) { // 0x79
value = *vars->val.doubleVal;
}
else if(vars->type == ASN_INTEGER) { // 0x02
value = (double)*vars->val.integer;
}
}
} else {
/*
* FAILURE: print what went wrong!
*/
if (status == STAT_SUCCESS)
fprintf(stderr, "Error in packet\nReason: %s\n",
snmp_errstring(response->errstat));
else
snmp_sess_perror("snmpget",snmp_sess_session(m_sessp));
return 0;
}
snmp_free_pdu(response);
return value;
}
bool Session::getVariables(const QStringList &oids, QValueVector<QVariant> &retvars, uint32_t &status, int startIndex)
{
struct snmp_pdu *response = NULL;
if ( ! m_session )
{
status = 0xFFFFFFFF;
return false;
}
struct snmp_pdu *pdu = snmp_pdu_create(SNMP_MSG_GET);
u_long anOID[MAX_OID_LEN];
QStringList::const_iterator it = oids.begin();
for(int i = 0; i < startIndex; i++) it++; // rough hack, but works
for(int i = 0; it != oids.end() && i < 5; it++, i++ )
{
size_t anOID_len = MAX_OID_LEN;
get_node((*it).latin1(), anOID, &anOID_len);
snmp_add_null_var(pdu, anOID, anOID_len);
}
status = snmp_synch_response(m_session, pdu, &response);
//! @todo Error handling should be changed in a more OO way.
if ( status != STAT_SUCCESS )
{
snmp_sess_perror("snmpget", m_session);
return false;
}
if ( response->errstat != SNMP_ERR_NOERROR )
{
kdWarning() << "Error in packet: " << snmp_errstring(response->errstat) << endl;
snmp_free_pdu(response);
return false;
}
variable_list *var = response->variables;
int i = startIndex;
while( var )
{
retvars[i] = snmpvarToVariant(var);
i++;
var = var->next_variable;
}
snmp_free_pdu(response);
return true;
}
netsnmp_variable_list *
collect(netsnmp_session * ss, netsnmp_pdu *pdu,
oid * base, size_t base_length)
{
netsnmp_pdu *response;
int running = 1;
netsnmp_variable_list *saved = NULL, **vlpp = &saved;
int status;
while (running) {
/*
* gotta catch em all, gotta catch em all!
*/
status = snmp_synch_response(ss, pdu, &response);
if (status != STAT_SUCCESS || !response) {
snmp_sess_perror("snmpdf", ss);
exit(1);
}
if (response->errstat != SNMP_ERR_NOERROR) {
fprintf(stderr, "snmpdf: Error in packet: %s\n",
snmp_errstring(response->errstat));
exit(1);
}
if (response && snmp_oid_compare(response->variables->name,
SNMP_MIN(base_length,
response->variables->
name_length), base,
base_length) != 0)
running = 0;
else {
/*
* get response
*/
*vlpp = response->variables;
(*vlpp)->next_variable = NULL; /* shouldn't be any, but just in case */
/*
* create the next request
*/
pdu = snmp_pdu_create(SNMP_MSG_GETNEXT);
snmp_add_null_var(pdu, (*vlpp)->name, (*vlpp)->name_length);
/*
* finish loop setup
*/
vlpp = &((*vlpp)->next_variable);
response->variables = NULL; /* ahh, forget about it */
}
snmp_free_pdu(response);
}
return saved;
}
int main(int argc, char ** argv)
{
struct snmp_session session;
struct snmp_session *sess_handle;
struct snmp_pdu *pdu;
struct snmp_pdu *response;
struct variable_list *vars;
oid id_oid[MAX_OID_LEN];
oid serial_oid[MAX_OID_LEN];
size_t id_len = MAX_OID_LEN;
size_t serial_len = MAX_OID_LEN;
int status;
struct tree * mib_tree;
/*********************/
if(argv[1] == NULL){
printf("Please supply a hostname\n");
exit(1);
}
init_snmp("Main check");
snmp_sess_init( &session );
session.version = SNMP_VERSION_1;
session.community = "public";
session.community_len = strlen(session.community);
session.peername = argv[1];
sess_handle = snmp_open(&session);
add_mibdir(".");
mib_tree = read_mib("mibs/SNMPv2-MIB.txt");
pdu = snmp_pdu_create(SNMP_MSG_GET);
read_objid("SNMPv2-MIB::sysDescr.0", id_oid, &id_len);
snmp_add_null_var(pdu, id_oid, id_len);
read_objid("SNMPv2-MIB::sysObjectID.0", serial_oid, &serial_len);
snmp_add_null_var(pdu, serial_oid, serial_len);
status = snmp_synch_response(sess_handle, pdu, &response);
for(vars = response->variables; vars; vars = vars->next_variable)
print_value(vars->name, vars->name_length, vars);
snmp_free_pdu(response);
snmp_close(sess_handle);
return (0);
}
/** Get channel status
*/
int getChannelStatus(HSNMP m_sessp, int channel) {
double value;
struct snmp_pdu* pdu = snmp_pdu_create(SNMP_MSG_GET); // prepare get-request pdu
// for(each GET request to one crate) {
snmp_add_null_var(pdu,oidOutputStatus[channel],lengthOutputStatus[channel]); // generate request data
// } // endfor
struct snmp_pdu* response;
int status = snmp_sess_synch_response(m_sessp,pdu,&response);
/*
* Process the response.
*/
if (status == STAT_SUCCESS && response->errstat == SNMP_ERR_NOERROR) {
/*
* SUCCESS: Print the result variables
*/
struct variable_list *vars;
// debug print
//for(vars = response->variables; vars; vars = vars->next_variable)
// print_variable(vars->name, vars->name_length, vars);
/* manipuate the information ourselves */
for(vars = response->variables; vars; vars = vars->next_variable) {
if (vars->type == ASN_OPAQUE_FLOAT) { // 0x78
value = *vars->val.floatVal;
}
else if (vars->type == ASN_OPAQUE_DOUBLE) { // 0x79
value = *vars->val.doubleVal;
}
else if(vars->type == ASN_INTEGER) { // 0x02
value = (double)*vars->val.integer;
} else if(vars->type == ASN_OCTET_STR) { // 0x04
unsigned long bitstring = 0;
for(int cpos = vars->val_len-1;cpos >= 0;cpos--) {
unsigned char octet = vars->val.string[cpos];
for(int bpos = 0;bpos < 8;bpos++) { // convert one character
bitstring <<= 1;
if(octet&0x01) bitstring |= 1;
octet >>= 1;
}
}
value = bitstring;
}
}
} else {
SaErrorT snmp_getn_bulk( struct snmp_session *ss,
oid *bulk_objid,
size_t bulk_objid_len,
struct snmp_pdu *bulk_pdu,
struct snmp_pdu **bulk_response,
int num_repetitions )
{
int status;
SaErrorT rtncode = SA_OK;
// struct variable_list *vars;
bulk_pdu = snmp_pdu_create(SNMP_MSG_GETBULK);
bulk_pdu->non_repeaters = 0;
bulk_pdu->max_repetitions = num_repetitions;
snmp_add_null_var(bulk_pdu, bulk_objid, bulk_objid_len);
/* Send the Request out.*/
status = snmp_synch_response(ss, bulk_pdu, bulk_response);
/*
* Process the response.
*/
#if 0
if (status == STAT_SUCCESS) {
vars = (*bulk_response)->variables;
if ((*bulk_response)->errstat == SNMP_ERR_NOERROR) {
if (!CHECH_END(vars->type)) {
/* This is one of the exception condition */
rtncode = SA_ERR_HPI_NOT_PRESENT;
dbg("snmp exception %d \n",vars->type);
}
} else {
fprintf(stderr, "Error in packet %s\nReason: %s\n",
(char *)bulk_objid, snmp_errstring((*bulk_response)->errstat));
if ((*bulk_response)->errstat == SNMP_ERR_NOSUCHNAME)
(*bulk_response)->errstat = SNMP_NOSUCHOBJECT;
rtncode = (SaErrorT) (SA_ERR_SNMP_BASE - (*bulk_response)->errstat);
}
} else {
snmp_sess_perror("snmpset", ss);
rtncode = (SaErrorT) (SA_ERR_SNMP_BASE - status);
}
#endif
return(rtncode);
}
void snmp::session::get_bulk(std::map<snmp::oid, snmp::variant> & variables)
{
auto request = snmp_pdu_create(SNMP_MSG_GET);
for (auto var : variables)
{
snmp_add_null_var(request, var.first.data(), var.first.size());
}
auto response = perform_request(cast_session(_ss), request);
for (auto var = response->variables; var; var = var->next_variable)
{
save_variable(variables, var);
}
}
/*
* response handler
*/
int asynch_response(int operation, struct snmp_session *sp, int reqid,
struct snmp_pdu *pdu, void *magic)
{
struct session *host = (struct session *)magic;
struct snmp_pdu *req;
struct oid *op;
if (operation == NETSNMP_CALLBACK_OP_RECEIVED_MESSAGE) {
if (print_result(STAT_SUCCESS, host->sess, pdu)) {
/* host->current_oid++; */ /* send next GET (if any) */
op = host->current_oid;
op++;
while(op->hostname)
{
/* printf("[%s] [%s]\n",op->hostname, host->current_oid->hostname); */
if(strcmp(op->hostname,host->current_oid->hostname)==0) {
host->current_oid = op;
break;
}
op++;
}
if (op->hostname && host->current_oid->Name) {
req = snmp_pdu_create(SNMP_MSG_GET);
snmp_add_null_var(req, host->current_oid->Oid, host->current_oid->OidLen);
if (snmp_send(host->sess, req))
return 1;
else {
snmp_perror("snmp_send");
snmp_free_pdu(req);
}
}
else
{
/* printf("No more OIDs for [%s]\n", host->current_oid->hostname); */
}
}
}
else
print_result(STAT_TIMEOUT, host->sess, pdu);
/* something went wrong (or end of variables)
* this host not active any more
*/
active_hosts--;
return 1;
}
int mau_mib_mgr_get_ifJackEntry(struct snmp_session *s, ifJackEntry_t **ifJackEntry)
{
struct snmp_session *peer;
struct snmp_pdu *request, *response;
struct variable_list *vars;
int status;
request = snmp_pdu_create(SNMP_MSG_GETNEXT);
snmp_add_null_var(request, ifJackType, sizeof(ifJackType)/sizeof(oid));
peer = snmp_open(s);
if (!peer) {
snmp_free_pdu(request);
return -1;
}
status = snmp_synch_response(peer, request, &response);
if (status != STAT_SUCCESS) {
if (response) snmp_free_pdu(response);
snmp_close(peer);
return -2;
}
*ifJackEntry = (ifJackEntry_t *) malloc(sizeof(ifJackEntry_t));
if (! *ifJackEntry) {
if (response) snmp_free_pdu(response);
snmp_close(peer);
return -4;
}
for (vars = response->variables; vars; vars = vars->next_variable) {
if (vars->name_length > sizeof(ifJackType)/sizeof(oid)
&& memcmp(vars->name, ifJackType, sizeof(ifJackType)) == 0) {
(*ifJackEntry)->__ifJackType = *vars->val.integer;
(*ifJackEntry)->ifJackType = &((*ifJackEntry)->__ifJackType);
}
}
if (response) snmp_free_pdu(response);
if (snmp_close(peer) == 0) {
return -5;
}
return 0;
}
