NAME

       nbd_set_uri_allow_transports - set the allowed transports in NBD URIs

SYNOPSIS

        #include <libnbd.h>

        int nbd_set_uri_allow_transports (
              struct nbd_handle *h, uint32_t mask
            );

DESCRIPTION

       Set which transports are allowed to appear in NBD URIs.  The default is to allow any
       transport.

       The "mask" parameter may contain any of the following flags ORed together:

       "LIBNBD_ALLOW_TRANSPORT_TCP" = 0x1
       "LIBNBD_ALLOW_TRANSPORT_UNIX" = 0x2
       "LIBNBD_ALLOW_TRANSPORT_VSOCK" = 0x4

       For convenience, the constant "LIBNBD_ALLOW_TRANSPORT_MASK" is available to describe all
       transports recognized by this build of libnbd.  A future version of the library may add
       new flags.

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_transports 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_TRANSPORTS 1

SEE ALSO

       nbd_connect_uri(3), nbd_create(3), nbd_set_uri_allow_tls(3), libnbd(3).

AUTHORS

       Eric Blake

       Richard W.M. Jones

COPYRIGHT

       Copyright Red Hat

LICENSE

       This library is free software; you can redistribute it and/or modify it under the terms of
       the GNU Lesser General Public License as published by the Free Software Foundation; either
       version 2 of the License, or (at your option) any later version.

       This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU Lesser General Public License for more details.

       You should have received a copy of the GNU Lesser General Public License along with this
       library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
       Floor, Boston, MA 02110-1301 USA