SNMP Manager Programmer's Guide

Constructing and Interpreting Packets

SNMP Manager Programmer’s Guide–134249

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SNMP_Bind_Object_ID()

instance-count

is the number of components in the instance identifier whose value you supply in

instance-components. For example, an instance identifier of 1.2.3.4 has a

component count of 4.

instance-components

is a pointer to a structure of type OIDC_T that contains the instance identifier of the

variable binding.

value-count

is the number of components in the OID whose value you supply in value-

components.

value-components

is a pointer to a structure of type OIDC_T that contains the OID value.

The following example, taken from SNMPSET, binds an OID value to a request packet.

Related declarations include a global define and two OID structure declarations, one for

the instance identifier and one for the OID value. The Manager Services define

MAX_OID_COUNT is used to set the number of elements in the OID component arrays

and the component count variables to 32.

#define MAXOIDS 16

OIDC_T base_component_list[MAX_OID_COUNT];

OBJ_ID_T base_oid = { MAX_OID_COUNT, base_component_list };

OIDC_T val_component_list[MAX_OID_COUNT];

OBJ_ID_T val_oid = { MAX_OID_COUNT, val_component_list };

Other related variables are declared in the main block. The variable named longform

indicates that the invocation line specifies MIB objects that are not defined in MIB-II.

Manager Services has an internal table it can use to find the data type of MIB-II objects:

int longform = 0;

int mibtype = 0;

int oidcnt;

char *oidstr[MAXOIDS];

struct namerec *p;

SNMP_PKT_T *send_pkt;

char *typestr[MAXOIDS];

char *valstr[MAXOIDS];