sockets: Limit SocketAddressLegacy to external interfaces

SocketAddressLegacy 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.  SocketAddress is the
equivalent flat union.  Convert all users of SocketAddressLegacy to
SocketAddress, except for existing external interfaces.

See also commit fce5d53..9445673 and 85a82e8..c5f1ae3.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-7-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Minor editing accident fixed, commit message and a comment tweaked]

Signed-off-by: Markus Armbruster <armbru@redhat.com>

5 files changed, 53 insertions, 39 deletions

diff --git a/include/block/nbd.h b/include/block/nbd.h
index 3e373f0..0ed0775 100644
--- a/include/block/nbd.h
+++ b/include/block/nbd.h
@@ -164,4 +164,7 @@ void nbd_client_new(NBDExport *exp,
 void nbd_client_get(NBDClient *client);
 void nbd_client_put(NBDClient *client);
 
+void nbd_server_start(SocketAddress *addr, const char *tls_creds,
+                      Error **errp);
+
 #endif
diff --git a/include/io/channel-socket.h b/include/io/channel-socket.h
index c1aaa72..53801f6 100644
--- a/include/io/channel-socket.h
+++ b/include/io/channel-socket.h
@@ -91,7 +91,7 @@ qio_channel_socket_new_fd(int fd,
  * an error occurs.
  */
 int qio_channel_socket_connect_sync(QIOChannelSocket *ioc,
-                                    SocketAddressLegacy *addr,
+                                    SocketAddress *addr,
                                     Error **errp);
 
 /**
@@ -110,7 +110,7 @@ int qio_channel_socket_connect_sync(QIOChannelSocket *ioc,
  * as this function returns without waiting for completion.
  */
 void qio_channel_socket_connect_async(QIOChannelSocket *ioc,
-                                      SocketAddressLegacy *addr,
+                                      SocketAddress *addr,
                                       QIOTaskFunc callback,
                                       gpointer opaque,
                                       GDestroyNotify destroy);
@@ -128,7 +128,7 @@ void qio_channel_socket_connect_async(QIOChannelSocket *ioc,
  * an error occurs.
  */
 int qio_channel_socket_listen_sync(QIOChannelSocket *ioc,
-                                   SocketAddressLegacy *addr,
+                                   SocketAddress *addr,
                                    Error **errp);
 
 /**
@@ -147,7 +147,7 @@ int qio_channel_socket_listen_sync(QIOChannelSocket *ioc,
  * as this function returns without waiting for completion.
  */
 void qio_channel_socket_listen_async(QIOChannelSocket *ioc,
-                                     SocketAddressLegacy *addr,
+                                     SocketAddress *addr,
                                      QIOTaskFunc callback,
                                      gpointer opaque,
                                      GDestroyNotify destroy);
@@ -167,8 +167,8 @@ void qio_channel_socket_listen_async(QIOChannelSocket *ioc,
  * is established or an error occurs.
  */
 int qio_channel_socket_dgram_sync(QIOChannelSocket *ioc,
-                                  SocketAddressLegacy *localAddr,
-                                  SocketAddressLegacy *remoteAddr,
+                                  SocketAddress *localAddr,
+                                  SocketAddress *remoteAddr,
                                   Error **errp);
 
 /**
@@ -190,8 +190,8 @@ int qio_channel_socket_dgram_sync(QIOChannelSocket *ioc,
  * waiting for completion.
  */
 void qio_channel_socket_dgram_async(QIOChannelSocket *ioc,
-                                    SocketAddressLegacy *localAddr,
-                                    SocketAddressLegacy *remoteAddr,
+                                    SocketAddress *localAddr,
+                                    SocketAddress *remoteAddr,
                                     QIOTaskFunc callback,
                                     gpointer opaque,
                                     GDestroyNotify destroy);
@@ -205,12 +205,12 @@ void qio_channel_socket_dgram_async(QIOChannelSocket *ioc,
  * Get the string representation of the local socket
  * address. A pointer to the allocated address information
  * struct will be returned, which the caller is required to
- * release with a call qapi_free_SocketAddressLegacy() when no
+ * release with a call qapi_free_SocketAddress() when no
  * longer required.
  *
  * Returns: 0 on success, -1 on error
  */
-SocketAddressLegacy *
+SocketAddress *
 qio_channel_socket_get_local_address(QIOChannelSocket *ioc,
                                      Error **errp);
 
@@ -222,12 +222,12 @@ qio_channel_socket_get_local_address(QIOChannelSocket *ioc,
  * Get the string representation of the local socket
  * address. A pointer to the allocated address information
  * struct will be returned, which the caller is required to
- * release with a call qapi_free_SocketAddressLegacy() when no
+ * release with a call qapi_free_SocketAddress() when no
  * longer required.
  *
  * Returns: the socket address struct, or NULL on error
  */
-SocketAddressLegacy *
+SocketAddress *
 qio_channel_socket_get_remote_address(QIOChannelSocket *ioc,
                                       Error **errp);
 
diff --git a/include/io/dns-resolver.h b/include/io/dns-resolver.h
index aac46ca..2f69c08 100644
--- a/include/io/dns-resolver.h
+++ b/include/io/dns-resolver.h
@@ -40,15 +40,15 @@ typedef struct QIODNSResolverClass QIODNSResolverClass;
  * QIODNSResolver:
  *
  * The QIODNSResolver class provides a framework for doing
- * DNS resolution on SocketAddressLegacy objects, independently
+ * DNS resolution on SocketAddress objects, independently
  * of socket creation.
  *
  * <example>
  *   <title>Resolving addresses synchronously</title>
  *   <programlisting>
- *    int mylisten(SocketAddressLegacy *addr, Error **errp) {
+ *    int mylisten(SocketAddress *addr, Error **errp) {
  *      QIODNSResolver *resolver = qio_dns_resolver_get_instance();
- *      SocketAddressLegacy **rawaddrs = NULL;
+ *      SocketAddress **rawaddrs = NULL;
  *      size_t nrawaddrs = 0;
  *      Error *err = NULL;
  *      QIOChannel **socks = NULL;
@@ -69,7 +69,7 @@ typedef struct QIODNSResolverClass QIODNSResolverClass;
  *            socks = g_renew(QIOChannelSocket *, socks, nsocks + 1);
  *            socks[nsocks++] = sock;
  *         }
- *         qapi_free_SocketAddressLegacy(rawaddrs[i]);
+ *         qapi_free_SocketAddress(rawaddrs[i]);
  *      }
  *      g_free(rawaddrs);
  *
@@ -95,7 +95,7 @@ typedef struct QIODNSResolverClass QIODNSResolverClass;
  *      MyListenData *data = opaque;
  *      QIODNSResolver *resolver =
  *         QIO_DNS_RESOLVER(qio_task_get_source(task);
- *      SocketAddressLegacy **rawaddrs = NULL;
+ *      SocketAddress **rawaddrs = NULL;
  *      size_t nrawaddrs = 0;
  *      Error *err = NULL;
  *
@@ -116,7 +116,7 @@ typedef struct QIODNSResolverClass QIODNSResolverClass;
  *            socks = g_renew(QIOChannelSocket *, socks, nsocks + 1);
  *            socks[nsocks++] = sock;
  *         }
- *         qapi_free_SocketAddressLegacy(rawaddrs[i]);
+ *         qapi_free_SocketAddress(rawaddrs[i]);
  *      }
  *      g_free(rawaddrs);
  *
@@ -127,7 +127,7 @@ typedef struct QIODNSResolverClass QIODNSResolverClass;
  *      }
  *    }
  *
- *    void mylisten(SocketAddressLegacy *addr, MyListenData *data) {
+ *    void mylisten(SocketAddress *addr, MyListenData *data) {
  *      QIODNSResolver *resolver = qio_dns_resolver_get_instance();
  *      qio_dns_resolver_lookup_async(dns, addr,
  *                                    mylistenresult, data, NULL);
@@ -177,9 +177,9 @@ QIODNSResolver *qio_dns_resolver_get_instance(void);
  * Returns: 0 if resolution was successful, -1 on error
  */
 int qio_dns_resolver_lookup_sync(QIODNSResolver *resolver,
-                                 SocketAddressLegacy *addr,
+                                 SocketAddress *addr,
                                  size_t *naddrs,
-                                 SocketAddressLegacy ***addrs,
+                                 SocketAddress ***addrs,
                                  Error **errp);
 
 /**
@@ -201,7 +201,7 @@ int qio_dns_resolver_lookup_sync(QIODNSResolver *resolver,
  * of the caller will not be blocked.
  */
 void qio_dns_resolver_lookup_async(QIODNSResolver *resolver,
-                                   SocketAddressLegacy *addr,
+                                   SocketAddress *addr,
                                    QIOTaskFunc func,
                                    gpointer opaque,
                                    GDestroyNotify notify);
@@ -223,6 +223,6 @@ void qio_dns_resolver_lookup_async(QIODNSResolver *resolver,
 void qio_dns_resolver_lookup_result(QIODNSResolver *resolver,
                                     QIOTask *task,
                                     size_t *naddrs,
-                                    SocketAddressLegacy ***addrs);
+                                    SocketAddress ***addrs);
 
 #endif /* QIO_DNS_RESOLVER_H */
diff --git a/include/io/task.h b/include/io/task.h
index f65ec7a..6021f51 100644
--- a/include/io/task.h
+++ b/include/io/task.h
@@ -166,7 +166,7 @@ typedef void (*QIOTaskWorker)(QIOTask *task,
  *                                       gpointer opaque)
  *    {
  *       QMyObject obj = QMY_OBJECT(qio_task_get_source(task));
- *       SocketAddressLegacy *addr = opaque;
+ *       SocketAddress *addr = opaque;
  *       Error *err = NULL;
  *
  *       obj->fd = socket_listen(addr, &err);
@@ -175,20 +175,20 @@ typedef void (*QIOTaskWorker)(QIOTask *task,
  *    }
  *
  *    void myobject_listen_async(QMyObject *obj,
- *                               SocketAddressLegacy *addr,
+ *                               SocketAddress *addr,
  *                               QIOTaskFunc *func,
  *                               gpointer opaque,
  *                               GDestroyNotify notify)
  *    {
  *      QIOTask *task;
- *      SocketAddressLegacy *addrCopy;
+ *      SocketAddress *addrCopy;
  *
- *      addrCopy = QAPI_CLONE(SocketAddressLegacy, addr);
+ *      addrCopy = QAPI_CLONE(SocketAddress, addr);
  *      task = qio_task_new(OBJECT(obj), func, opaque, notify);
  *
  *      qio_task_run_in_thread(task, myobject_listen_worker,
  *                             addrCopy,
- *                             qapi_free_SocketAddressLegacy);
+ *                             qapi_free_SocketAddress);
  *    }
  * </example>
  *
diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h
index 82b7460..a0b5cae 100644
--- a/include/qemu/sockets.h
+++ b/include/qemu/sockets.h
@@ -45,12 +45,12 @@ NetworkAddressFamily inet_netfamily(int family);
 int unix_listen(const char *path, char *ostr, int olen, Error **errp);
 int unix_connect(const char *path, Error **errp);
 
-SocketAddressLegacy *socket_parse(const char *str, Error **errp);
-int socket_connect(SocketAddressLegacy *addr, NonBlockingConnectHandler *callback,
+SocketAddress *socket_parse(const char *str, Error **errp);
+int socket_connect(SocketAddress *addr, NonBlockingConnectHandler *callback,
                    void *opaque, Error **errp);
-int socket_listen(SocketAddressLegacy *addr, Error **errp);
+int socket_listen(SocketAddress *addr, Error **errp);
 void socket_listen_cleanup(int fd, Error **errp);
-int socket_dgram(SocketAddressLegacy *remote, SocketAddressLegacy *local, Error **errp);
+int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp);
 
 /* Old, ipv4 only bits.  Don't use for new code. */
 int parse_host_port(struct sockaddr_in *saddr, const char *str);
@@ -65,12 +65,12 @@ int socket_init(void);
  * Get the string representation of the socket
  * address. A pointer to the allocated address information
  * struct will be returned, which the caller is required to
- * release with a call qapi_free_SocketAddressLegacy() when no
+ * release with a call qapi_free_SocketAddress() when no
  * longer required.
  *
  * Returns: the socket address struct, or NULL on error
  */
-SocketAddressLegacy *
+SocketAddress *
 socket_sockaddr_to_address(struct sockaddr_storage *sa,
                            socklen_t salen,
                            Error **errp);
@@ -83,12 +83,12 @@ socket_sockaddr_to_address(struct sockaddr_storage *sa,
  * Get the string representation of the local socket
  * address. A pointer to the allocated address information
  * struct will be returned, which the caller is required to
- * release with a call qapi_free_SocketAddressLegacy() when no
+ * release with a call qapi_free_SocketAddress() when no
  * longer required.
  *
  * Returns: the socket address struct, or NULL on error
  */
-SocketAddressLegacy *socket_local_address(int fd, Error **errp);
+SocketAddress *socket_local_address(int fd, Error **errp);
 
 /**
  * socket_remote_address:
@@ -98,12 +98,12 @@ SocketAddressLegacy *socket_local_address(int fd, Error **errp);
  * Get the string representation of the remote socket
  * address. A pointer to the allocated address information
  * struct will be returned, which the caller is required to
- * release with a call qapi_free_SocketAddressLegacy() when no
+ * release with a call qapi_free_SocketAddress() when no
  * longer required.
  *
  * Returns: the socket address struct, or NULL on error
  */
-SocketAddressLegacy *socket_remote_address(int fd, Error **errp);
+SocketAddress *socket_remote_address(int fd, Error **errp);
 
 /**
  * socket_address_to_string:
@@ -118,7 +118,7 @@ SocketAddressLegacy *socket_remote_address(int fd, Error **errp);
  *
  * Returns: the socket address in string format, or NULL on error
  */
-char *socket_address_to_string(struct SocketAddressLegacy *addr, Error **errp);
+char *socket_address_to_string(struct SocketAddress *addr, Error **errp);
 
 /**
  * socket_address_crumple:
@@ -131,4 +131,15 @@ char *socket_address_to_string(struct SocketAddressLegacy *addr, Error **errp);
  */
 SocketAddressLegacy *socket_address_crumple(SocketAddress *addr);
 
+/**
+ * socket_address_flatten:
+ * @addr: the socket address to flatten
+ *
+ * Convert SocketAddressLegacy to SocketAddress.  Caller is responsible
+ * for freeing with qapi_free_SocketAddress().
+ *
+ * Returns: the argument converted to SocketAddress.
+ */
+SocketAddress *socket_address_flatten(SocketAddressLegacy *addr);
+
 #endif /* QEMU_SOCKETS_H */