// Generate and return the Filter associated with the Builder.
func (b *Builder) Build() *Filter {
prog := (*C.struct_bpf_program)(b.filter.Program())
flen := int(C.bpf_get_len(prog))
for i := 0; i < flen; i++ {
insn := C.bpf_get_insn(prog, C.int(i))
if lbl, ok := b.jumps_k[i]; ok {
addr := b.labels[lbl]
if addr != 0 {
insn.k = C.bpf_u_int32(addr - i - 1)
}
}
if lbl, ok := b.jumps_jt[i]; ok {
addr := b.labels[lbl]
if addr != 0 {
insn.jt = C.u_char(addr - i - 1)
}
}
if lbl, ok := b.jumps_jf[i]; ok {
addr := b.labels[lbl]
if addr != 0 {
insn.jf = C.u_char(addr - i - 1)
}
}
}
return b.filter
}
func encodeBindings(internal *C.snmp_pdu_t, vbs *VariableBindings) SnmpError {
if SNMP_MAX_BINDINGS < vbs.Len() {
return Errorf(SNMP_CODE_FAILED, "bindings too long, SNMP_MAX_BINDINGS is %d, variableBindings is %d",
SNMP_MAX_BINDINGS, vbs.Len())
}
for i, vb := range vbs.All() {
err := oidWrite(&internal.bindings[i].oid, &vb.Oid)
if nil != err {
internal.nbindings = C.u_int(i) + 1 // free
return err
}
if nil == vb.Value {
internal.bindings[i].syntax = uint32(SNMP_SYNTAX_NULL)
continue
}
internal.bindings[i].syntax = uint32(vb.Value.GetSyntax())
switch vb.Value.GetSyntax() {
case SNMP_SYNTAX_NULL:
case SNMP_SYNTAX_INTEGER:
C.snmp_value_put_int32(&internal.bindings[i].v, C.int32_t(vb.Value.GetInt32()))
case SNMP_SYNTAX_OCTETSTRING:
send_bytes := vb.Value.GetBytes()
if nil != send_bytes && 0 != len(send_bytes) {
C.snmp_value_put_octets(&internal.bindings[i].v, unsafe.Pointer(&send_bytes[0]), C.u_int(len(send_bytes)))
} else {
C.snmp_value_put_octets(&internal.bindings[i].v, nil, C.u_int(0))
}
case SNMP_SYNTAX_OID:
err = oidWrite(C.snmp_value_get_oid(&internal.bindings[i].v), vb.Value)
if nil != err {
internal.nbindings = C.u_int(i) + 1 // free
return err
}
case SNMP_SYNTAX_IPADDRESS:
send_bytes := vb.Value.GetBytes()
if 4 != len(send_bytes) {
internal.nbindings = C.u_int(i) + 1 // free
return Errorf(SNMP_CODE_FAILED, "ip address is error, it's length is %d, excepted length is 4, value is %s",
len(send_bytes), vb.Value.String())
}
C.snmp_value_put_ipaddress(&internal.bindings[i].v, C.u_char(send_bytes[0]),
C.u_char(send_bytes[1]), C.u_char(send_bytes[2]), C.u_char(send_bytes[3]))
case SNMP_SYNTAX_COUNTER:
C.snmp_value_put_uint32(&internal.bindings[i].v, C.uint32_t(vb.Value.GetUint32()))
case SNMP_SYNTAX_GAUGE:
C.snmp_value_put_uint32(&internal.bindings[i].v, C.uint32_t(vb.Value.GetUint32()))
case SNMP_SYNTAX_TIMETICKS:
C.snmp_value_put_uint32(&internal.bindings[i].v, C.uint32_t(vb.Value.GetUint32()))
case SNMP_SYNTAX_COUNTER64:
uint64_to_counter64(vb.Value.GetUint64(), &internal.bindings[i].v)
//cs := C.CString(s)
//defer C.free(unsafe.Pointer(cs))
//C.snmp_value_put_uint64_str(&internal.bindings[i].v, cs)
//C.snmp_value_put_uint64(&internal.bindings[i].v, C.uint64_t(vb.Value.GetUint64()))
default:
internal.nbindings = C.u_int(i) + 1 // free
return Errorf(SNMP_CODE_FAILED, "unsupported type - %v", vb.Value)
}
}
internal.nbindings = C.u_int(vbs.Len())
return nil
}
