int
mps_getreq(struct snmp_message *msg, struct ber_element *root,
struct ber_oid *o, u_int sm_version)
{
struct ber_element *elm = root;
struct oid key, *value;
unsigned long error_type = 0; /* noSuchObject */
if (o->bo_n > BER_MAX_OID_LEN)
return (-1);
bzero(&key, sizeof(key));
bcopy(o, &key.o_id, sizeof(struct ber_oid));
smi_oidlen(&key.o_id); /* Strip off any trailing .0. */
value = smi_find(&key);
if (value == NULL)
goto fail;
if (OID_NOTSET(value))
return (-1);
if (value->o_flags & OID_REGISTERED) {
struct agentx_pdu *pdu;
if ((pdu = snmp_agentx_get_pdu((struct snmp_oid *)o, 1)) == NULL)
return (-1);
pdu->cookie = msg;
if (snmp_agentx_send(value->o_session->handle, pdu) == -1)
return (-1);
control_event_add(value->o_session,
value->o_session->handle->fd, EV_WRITE, NULL);
return (1);
}
if (value->o_get == NULL)
goto fail;
if (value->o_oidlen == o->bo_n) {
/* No instance identifier specified. */
error_type = 1; /* noSuchInstance */
goto fail;
}
if ((value->o_flags & OID_TABLE) == 0)
elm = ber_add_oid(elm, o);
if (value->o_get(value, o, &elm) != 0)
return (-1);
return (0);
fail:
if (sm_version == 0)
return (-1);
/* Set SNMPv2 extended error response. */
elm = ber_add_oid(elm, o);
elm = ber_add_null(elm);
ber_set_header(elm, BER_CLASS_CONTEXT, error_type);
return (0);
}
/*
* Convert variable bindings from AgentX to SNMP dialect.
*/
int
varbind_convert(struct agentx_pdu *pdu, struct agentx_varbind_hdr *vbhdr,
struct ber_element **varbind, struct ber_element **iter)
{
struct ber_oid oid;
u_int32_t d;
u_int64_t l;
int slen;
char *str;
struct ber_element *a;
int ret = AGENTX_ERR_NONE;
if (snmp_agentx_read_oid(pdu, (struct snmp_oid *)&oid) == -1) {
ret = AGENTX_ERR_PARSE_ERROR;
goto done;
}
*iter = ber_add_sequence(*iter);
if (*varbind == NULL)
*varbind = *iter;
a = ber_add_oid(*iter, &oid);
switch (vbhdr->type) {
case AGENTX_NO_SUCH_OBJECT:
case AGENTX_NO_SUCH_INSTANCE:
case AGENTX_END_OF_MIB_VIEW:
case AGENTX_NULL:
a = ber_add_null(a);
break;
case AGENTX_IP_ADDRESS:
case AGENTX_OPAQUE:
case AGENTX_OCTET_STRING:
str = snmp_agentx_read_octetstr(pdu, &slen);
if (str == NULL) {
ret = AGENTX_ERR_PARSE_ERROR;
goto done;
}
a = ber_add_nstring(a, str, slen);
break;
case AGENTX_OBJECT_IDENTIFIER:
if (snmp_agentx_read_oid(pdu,
(struct snmp_oid *)&oid) == -1) {
ret = AGENTX_ERR_PARSE_ERROR;
goto done;
}
a = ber_add_oid(a, &oid);
break;
case AGENTX_INTEGER:
case AGENTX_COUNTER32:
case AGENTX_GAUGE32:
case AGENTX_TIME_TICKS:
if (snmp_agentx_read_int(pdu, &d) == -1) {
ret = AGENTX_ERR_PARSE_ERROR;
goto done;
}
a = ber_add_integer(a, d);
break;
case AGENTX_COUNTER64:
if (snmp_agentx_read_int64(pdu, &l) == -1) {
ret = AGENTX_ERR_PARSE_ERROR;
goto done;
}
a = ber_add_integer(a, l);
break;
default:
log_debug("unknown data type '%i'", vbhdr->type);
ret = AGENTX_ERR_PARSE_ERROR;
goto done;
}
/* AgentX types correspond to BER types */
switch (vbhdr->type) {
case BER_TYPE_INTEGER:
case BER_TYPE_BITSTRING:
case BER_TYPE_OCTETSTRING:
case BER_TYPE_NULL:
case BER_TYPE_OBJECT:
/* universal types */
break;
/* Convert AgentX error types to SNMP error types */
case AGENTX_NO_SUCH_OBJECT:
ber_set_header(a, BER_CLASS_CONTEXT, 0);
break;
case AGENTX_NO_SUCH_INSTANCE:
ber_set_header(a, BER_CLASS_CONTEXT, 1);
break;
case AGENTX_COUNTER32:
ber_set_header(a, BER_CLASS_APPLICATION, SNMP_COUNTER32);
break;
case AGENTX_GAUGE32:
ber_set_header(a, BER_CLASS_APPLICATION, SNMP_GAUGE32);
break;
case AGENTX_COUNTER64:
ber_set_header(a, BER_CLASS_APPLICATION, SNMP_COUNTER64);
break;
case AGENTX_IP_ADDRESS:
/* application 0 implicit 4-byte octet string per SNMPv2-SMI */
break;
default:
/* application-specific types */
ber_set_header(a, BER_CLASS_APPLICATION, vbhdr->type);
break;
}
done:
return (ret);
}
