snmp: let handlers accept OID from a lesser prefix
Most table handlers do not expect to be given an OID whose prefix is
outside what they can handle. This is not a problem with the SMUX
implementation since it always correct the OID such that the prefix
matches. However, this is not the case for the AgentX
implementation. A new function, smux_header_table() is used to do this
normalization.
diff --git a/lib/snmp.c b/lib/snmp.c
index d7b1d95..79595a1 100644
--- a/lib/snmp.c
+++ b/lib/snmp.c
@@ -110,4 +110,24 @@
return MATCH_SUCCEEDED;
}
+
+int
+smux_header_table (struct variable *v, oid *name, size_t *length, int exact,
+ size_t *var_len, WriteMethod **write_method)
+{
+ /* If the requested OID name is less than OID prefix we
+ handle, adjust it to our prefix. */
+ if ((oid_compare (name, *length, v->name, v->namelen)) < 0)
+ {
+ if (exact)
+ return MATCH_FAILED;
+ oid_copy(name, v->name, v->namelen);
+ *length = v->namelen;
+ }
+
+ *write_method = 0;
+ *var_len = sizeof(long);
+
+ return MATCH_SUCCEEDED;
+}
#endif /* HAVE_SNMP */