### Method

# Gio DtlsConnection set_advertised_protocols

since: 2.60

#### Declaration

    void
    g_dtls_connection_set_advertised_protocols (
      GDtlsConnection* conn,
      const gchar* const* protocols
    )

#### Description

Sets the list of application-layer protocols to advertise that the caller is willing to speak on this connection. The Application-Layer Protocol Negotiation (ALPN) extension will be used to negotiate a compatible protocol with the peer; use `g_dtls_connection_get_negotiated_protocol()` to find the negotiated protocol after the handshake. Specifying `NULL` for the the value of `protocols` will disable ALPN negotiation.

See IANA TLS ALPN Protocol IDs for a list of registered protocol IDs.

Available since: 2.60

Sets property | `Gio.DtlsConnection:advertised-protocols`

#### Parameters

`protocols`

  Type: An array of `gchar*`

  A `NULL`-terminated array of ALPN protocol names (eg, “http/1.1”, “h2”), or `NULL`.

  The argument can be `NULL`.
  The array must be `NULL`-terminated.
  The data is owned by the caller of the method.
  Each element is a NUL terminated UTF-8 string.