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sockets: New helper socket_address_crumple()

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SocketAddress is a simple union, and simple unions are awkward: they
have their variant members wrapped in a "data" object on the wire, and
require additional indirections in C.  I intend to limit its use to
existing external interfaces.  New ones should use SocketAddressFlat.
I further intend to convert all internal interfaces to
SocketAddressFlat.  This helper should go away then.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-id: 1490895797-29094-8-git-send-email-armbru@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Markus Armbruster 2017-03-30 19:43:15 +02:00 committed by Max Reitz
parent 8bc0673f6d
commit 216411b839
2 changed files with 43 additions and 0 deletions
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11
include/qemu/sockets.h
View File

@ -119,4 +119,15 @@ SocketAddress *socket_remote_address(int fd, Error **errp);
*/
char *socket_address_to_string(struct SocketAddress *addr, Error **errp);
/**
* socket_address_crumple:
* @addr_flat: the socket address to crumple
*
* Convert SocketAddressFlat to SocketAddress. Caller is responsible
* for freeing with qapi_free_SocketAddress().
*
* Returns: the argument converted to SocketAddress.
*/
SocketAddress *socket_address_crumple(SocketAddressFlat *addr_flat);
#endif /* QEMU_SOCKETS_H */

32
util/qemu-sockets.c
View File

@ -25,6 +25,7 @@
#include "qapi/error.h"
#include "qemu/sockets.h"
#include "qemu/main-loop.h"
#include "qapi/clone-visitor.h"
#include "qapi/qobject-input-visitor.h"
#include "qapi/qobject-output-visitor.h"
#include "qapi-visit.h"
@ -1341,3 +1342,34 @@ char *socket_address_to_string(struct SocketAddress *addr, Error **errp)
}
return buf;
}
SocketAddress *socket_address_crumple(SocketAddressFlat *addr_flat)
{
SocketAddress *addr = g_new(SocketAddress, 1);
switch (addr_flat->type) {
case SOCKET_ADDRESS_FLAT_TYPE_INET:
addr->type = SOCKET_ADDRESS_KIND_INET;
addr->u.inet.data = QAPI_CLONE(InetSocketAddress,
&addr_flat->u.inet);
break;
case SOCKET_ADDRESS_FLAT_TYPE_UNIX:
addr->type = SOCKET_ADDRESS_KIND_UNIX;
addr->u.q_unix.data = QAPI_CLONE(UnixSocketAddress,
&addr_flat->u.q_unix);
break;
case SOCKET_ADDRESS_FLAT_TYPE_VSOCK:
addr->type = SOCKET_ADDRESS_KIND_VSOCK;
addr->u.vsock.data = QAPI_CLONE(VsockSocketAddress,
&addr_flat->u.vsock);
break;
case SOCKET_ADDRESS_FLAT_TYPE_FD:
addr->type = SOCKET_ADDRESS_KIND_FD;
addr->u.fd.data = QAPI_CLONE(String, &addr_flat->u.fd);
break;
default:
abort();
}
return addr;
}