---
name: "ber_encode_null"
section: "3ber"
platform: "linux"
package: "libber0-dev"
version: "0.4.1"
release: "Debian 3.1 (Sarge)"
platforms: ["linux"]
url: "https://new.carta.tech/ber_encode_null"
---

# ber\_encode\_null(3ber)

## NAME

Basic Encoding Rules (BER) tag encoding routines

## LIBRARIES

Abz Library (-labz), Debug Library (-ldebug), BER Library (-lber)

## SYNOPSIS

```
#include <ber/ber.h>

int ber_encode_null(ber_t *ber);
int ber_encode_sequence(ber_t *ber, uint32_t length);
int ber_encode_get_request(ber_t *ber);
int ber_encode_get_next_request(ber_t *ber);
int ber_encode_get_response(ber_t *ber);
int ber_encode_set_request(ber_t *ber);
int ber_encode_trap(ber_t *ber);
int ber_encode_get_bulk_request(ber_t *ber);
int ber_encode_inform_request(ber_t *ber);
int ber_encode_snmpv2_trap(ber_t *ber);
int ber_encode_counter64(ber_t *ber, uint64_t value);
int ber_encode_integer(ber_t *ber, int32_t value);
int ber_encode_counter32(ber_t *ber, uint32_t value);
int ber_encode_gauge32(ber_t *ber, uint32_t value);
int ber_encode_timeticks(ber_t *ber, uint32_t ticks);
int ber_encode_ipaddress(ber_t *ber, uint32_t addr);
int ber_encode_octet_string(ber_t *ber, const octet_string_t *str);
int ber_encode_string(ber_t *ber, const char *str);
int ber_encode_oid(ber_t *ber, const uint32_t *oid);
int ber_encode_get_message(ber_t *ber);
int ber_encode_put_message(ber_t *ber);
int ber_encode_auth(ber_t *ber);
int ber_encode_reset(ber_t *ber);
int ber_encode_set_level(ber_t *ber);
```

## DESCRIPTION

These routines are used to encode a BER stack. BER or Basic Encoding Rules (ITU X.690) is a language used to encode data so that it can be transferred and interpreted by different hosts in a platform independant manner.

BER is used to encode data in SNMP and LDAP and probably other popular protocols as well. This library used by the author's SNMP software.

## RETURN VALUES

All of the functions return 0 if successful, -1 if some error occurred. Call **abz\_get\_error**(3) to retrieve error messages.

## NOTES

You have to initialize ber\_t (buf, offset, size) before calling any of the functions.

The functions encode the buffer from back to front. So after you've called the encoding functions, the buffer starts at ber-\>buf + ber-\>size - ber-\>offset.

Even though the size and offset field are unsigned 32-bit integers, the size of the buffer should not exceed 2147483647 bytes (maximum 32-bit signed integer value).

IP addresses are stored in network byte order.

## SEE ALSO

ber\_decode\_null(3), makeoid(3), abz\_get\_error(3), mem\_free(3)

## AUTHOR

Written by Abraham vd Merwe \<abz@blio.com\>