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;
}
int
agentx_send_ping(netsnmp_session * ss)
{
netsnmp_pdu *pdu, *response;
if (ss == NULL || !IS_AGENTX_VERSION(ss->version)) {
return 0;
}
pdu = snmp_pdu_create(AGENTX_MSG_PING);
if (pdu == NULL)
return 0;
pdu->time = 0;
pdu->sessid = ss->sessid;
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;
}
int
agentx_open_session(netsnmp_session * ss)
{
netsnmp_pdu *pdu, *response;
extern oid version_sysoid[];
extern int version_sysoid_len;
DEBUGMSGTL(("agentx/subagent", "opening session \n"));
if (ss == NULL || !IS_AGENTX_VERSION(ss->version)) {
return 0;
}
pdu = snmp_pdu_create(AGENTX_MSG_OPEN);
if (pdu == NULL)
return 0;
pdu->time = 0;
snmp_add_var(pdu, version_sysoid, version_sysoid_len,
's', "Net-SNMP AgentX sub-agent");
if (agentx_synch_response(ss, pdu, &response) != STAT_SUCCESS)
return 0;
if (response->errstat != SNMP_ERR_NOERROR) {
snmp_free_pdu(response);
return 0;
}
ss->sessid = response->sessid;
snmp_free_pdu(response);
DEBUGMSGTL(("agentx/subagent", "open \n"));
return 1;
}
int
agentx_add_agentcaps( struct snmp_session *ss,
oid* agent_cap, size_t agent_caplen, const char* descr)
{
struct snmp_pdu *pdu, *response;
if (! IS_AGENTX_VERSION( ss->version ))
return 0;
pdu = snmp_pdu_create(AGENTX_MSG_ADD_AGENT_CAPS);
if ( pdu == NULL )
return 0;
pdu->time = 0;
pdu->sessid = ss->sessid;
snmp_add_var( pdu, agent_cap, agent_caplen, 's', descr);
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;
}
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;
}
int
agentx_unregister_index(netsnmp_session * ss,
netsnmp_variable_list * varbind)
{
netsnmp_pdu *pdu, *response;
netsnmp_variable_list *varbind2;
if (ss == NULL || !IS_AGENTX_VERSION(ss->version)) {
return -1;
}
/*
* Make a copy of the index request varbind
* for the AgentX request PDU
* (since the pdu structure will be freed)
*/
varbind2 =
(netsnmp_variable_list *) malloc(sizeof(netsnmp_variable_list));
if (varbind2 == NULL)
return -1;
if (snmp_clone_var(varbind, varbind2)) {
snmp_free_varbind(varbind2);
return -1;
}
pdu = snmp_pdu_create(AGENTX_MSG_INDEX_DEALLOCATE);
if (pdu == NULL) {
snmp_free_varbind(varbind2);
return -1;
}
pdu->time = 0;
pdu->sessid = ss->sessid;
/*
* Just send a single index release varbind.
* (as above)
*/
pdu->variables = varbind2;
if (agentx_synch_response(ss, pdu, &response) != STAT_SUCCESS)
return -1;
if (response->errstat != SNMP_ERR_NOERROR) {
snmp_free_pdu(response);
return -1; /* XXX - say why */
}
snmp_free_pdu(response);
return SNMP_ERR_NOERROR;
}
int
agentx_register( struct snmp_session *ss, oid start[], size_t startlen,
int priority, int range_subid, oid range_ubound)
{
struct snmp_pdu *pdu, *response;
DEBUGMSGTL(("agentx/subagent","registering: "));
DEBUGMSGOID(("agentx/subagent", start, startlen));
DEBUGMSG(("agentx/subagent","\n"));
if (! IS_AGENTX_VERSION( ss->version ))
return 0;
pdu = snmp_pdu_create(AGENTX_MSG_REGISTER);
if ( pdu == NULL )
return 0;
pdu->time = 0;
pdu->priority = priority;
pdu->sessid = ss->sessid;
pdu->range_subid = range_subid;
if ( range_subid ) {
snmp_pdu_add_variable( pdu, start, startlen,
ASN_OBJECT_ID, (u_char *)start, startlen);
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 ) {
DEBUGMSGTL(("agentx/subagent","registering pdu failed: %d!\n",
response->errstat));
snmp_free_pdu(response);
return 0;
}
snmp_free_pdu(response);
DEBUGMSGTL(("agentx/subagent","registered\n"));
return 1;
}
int
agentx_close_session( struct snmp_session *ss, int why )
{
struct snmp_pdu *pdu, *response;
DEBUGMSGTL(("agentx/subagent","closing session\n"));
if (! IS_AGENTX_VERSION( ss->version ))
return 0;
pdu = snmp_pdu_create(AGENTX_MSG_CLOSE);
if ( pdu == NULL )
return 0;
pdu->time = 0;
pdu->errstat = why;
pdu->sessid = ss->sessid;
(void) agentx_synch_response(ss, pdu, &response);
snmp_free_pdu(response);
DEBUGMSGTL(("agentx/subagent","closed\n"));
return 1;
}
netsnmp_variable_list *
agentx_register_index(netsnmp_session * ss,
netsnmp_variable_list * varbind, int flags)
{
netsnmp_pdu *pdu, *response;
netsnmp_variable_list *varbind2;
if (ss == NULL || !IS_AGENTX_VERSION(ss->version)) {
return NULL;
}
/*
* Make a copy of the index request varbind
* for the AgentX request PDU
* (since the pdu structure will be freed)
*/
varbind2 =
(netsnmp_variable_list *) malloc(sizeof(netsnmp_variable_list));
if (varbind2 == NULL)
return NULL;
if (snmp_clone_var(varbind, varbind2)) {
snmp_free_varbind(varbind2);
return NULL;
}
if (varbind2->val.string == NULL)
varbind2->val.string = varbind2->buf; /* ensure it points somewhere */
pdu = snmp_pdu_create(AGENTX_MSG_INDEX_ALLOCATE);
if (pdu == NULL) {
snmp_free_varbind(varbind2);
return NULL;
}
pdu->time = 0;
pdu->sessid = ss->sessid;
if (flags == ALLOCATE_ANY_INDEX)
pdu->flags |= AGENTX_MSG_FLAG_ANY_INSTANCE;
if (flags == ALLOCATE_NEW_INDEX)
pdu->flags |= AGENTX_MSG_FLAG_NEW_INSTANCE;
/*
* Just send a single index request varbind.
* Although the AgentX protocol supports
* multiple index allocations in a single
* request, the model used in the net-snmp agent
* doesn't currently take advantage of this.
* I believe this is our prerogative - just as
* long as the master side Index request handler
* can cope with multiple index requests.
*/
pdu->variables = varbind2;
if (agentx_synch_response(ss, pdu, &response) != STAT_SUCCESS)
return NULL;
if (response->errstat != SNMP_ERR_NOERROR) {
snmp_free_pdu(response);
return NULL;
}
/*
* Unlink the (single) response varbind to return
* to the main driving index request routine.
*
* This is a memory leak, as nothing will ever
* release this varbind. If this becomes a problem,
* we'll need to keep a list of these here, and
* free the memory in the "index release" routine.
* But the master side never frees these either (by
* design, since it still needs them), so expecting
* the subagent to is discrimination, pure & simple :-)
*/
varbind2 = response->variables;
response->variables = NULL;
snmp_free_pdu(response);
return varbind2;
}
