gnutls_compression_list - Linux

Overview

gnutls_compression_list lists the available compression methods supported by the GNU Transport Layer Security (TLS) library. It is used to query the supported compression methods during TLS handshake negotiations.

Syntax

gnutls_compression_list

Options/Flags

None

Examples

Example 1: List supported compression methods

gnutls_compression_list

Output:

0: DEFLATE
2: NULL
5: ZLIB
7: ALGORITHM_ERROR

Common Issues

  • Error: "gnutls_compression_list: no compression methods found"

This error occurs when no compression methods are supported by both the client and the server. Ensure that both sides have compatible compression methods enabled.

Integration

gnutls_compression_list can be integrated into TLS handshake processes using the GnuTLS library. For example, in a TLS server application:

int ret;
gnutls_compression_method *list;
size_t list_size;

ret = gnutls_compression_list(&list, &list_size);
if (ret != GNUTLS_E_SUCCESS) {
    return ret;
}

// Use the list of supported compression methods in handshake negotiations.

gnutls_compression_free(list);

Related Commands

  • gnutls_cipher_list
  • gnutls_hash_list
  • gnutls_session_init