nbd_set_uri_allow_tls3

Usage

 #include <libnbd.h>
 int nbd_set_uri_allow_tls (
       struct nbd_handle *h, int tls
     );

Overview

Set which TLS settings are allowed to appear in NBD URIs. The default is to allow either non-TLS or TLS URIs.

The "tls" parameter can be:

"LIBNBD_TLS_DISABLE"

TLS URIs are not permitted, ie. a URI such as "nbds://..." will be rejected.

"LIBNBD_TLS_ALLOW"

This is the default. TLS may be used or not, depending on whether the URI uses "nbds" or "nbd".

"LIBNBD_TLS_REQUIRE"

TLS URIs are required. All URIs must use "nbds".

Return value

If the call is successful the function returns 0.

Errors

On error -1 is returned.

Refer to "ERROR HANDLING" in libnbd(3) for how to get further details of the error.

The following parameters must not be NULL: "h". For more information see "Non-NULL parameters" in libnbd(3).

Handle state

nbd_set_uri_allow_tls can be called when the handle is in the following state:

 ┌─────────────────────────────────────┬─────────────────────────┐
 │ Handle created, before connecting   │ ✅ allowed              │
 │ Connecting                          │ ❌ error                │
 │ Connecting & handshaking (opt_mode) │ ❌ error                │
 │ Connected to the server             │ ❌ error                │
 │ Connection shut down                │ ❌ error                │
 │ Handle dead                         │ ❌ error                │
 └─────────────────────────────────────┴─────────────────────────┘

Version

This function first appeared in libnbd 1.2.

If you need to test if this function is available at compile time check if the following macro is defined:

 #define LIBNBD_HAVE_NBD_SET_URI_ALLOW_TLS 1