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20a2c379c4
More vectors will give an error and we can simply clamp here and consider it like a short write instead. In case of GSocketOutputStream this is done here instead of inside GSocket before calling sendmsg() because we we can't generically handle short writes when sending messages on a socket, e.g. for datagram sockets this causes only part of the datagram to be sent and an error would be more useful in this case than sending corrupted data. Also reduce the fallback limit to 16 in gsocket.c as that's the minimum value required by POSIX and add a static assertion that the limit is never bigger than G_MAXINT as that's the type recvmmsg/sendmmsg take.
283 lines
9.4 KiB
C
283 lines
9.4 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright © 2008 Christian Kellner, Samuel Cormier-Iijima
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* © 2009 codethink
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Christian Kellner <gicmo@gnome.org>
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* Samuel Cormier-Iijima <sciyoshi@gmail.com>
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* Ryan Lortie <desrt@desrt.ca>
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*/
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#include "config.h"
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#include "goutputstream.h"
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#include "gsocketoutputstream.h"
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#include "gsocket.h"
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#include "glibintl.h"
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#include "gcancellable.h"
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#include "gpollableinputstream.h"
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#include "gpollableoutputstream.h"
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#include "gioerror.h"
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#include "glibintl.h"
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#include "gfiledescriptorbased.h"
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#include "gioprivate.h"
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struct _GSocketOutputStreamPrivate
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{
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GSocket *socket;
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/* pending operation metadata */
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gconstpointer buffer;
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gsize count;
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};
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static void g_socket_output_stream_pollable_iface_init (GPollableOutputStreamInterface *iface);
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#ifdef G_OS_UNIX
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static void g_socket_output_stream_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface);
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#endif
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#define g_socket_output_stream_get_type _g_socket_output_stream_get_type
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#ifdef G_OS_UNIX
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G_DEFINE_TYPE_WITH_CODE (GSocketOutputStream, g_socket_output_stream, G_TYPE_OUTPUT_STREAM,
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G_ADD_PRIVATE (GSocketOutputStream)
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G_IMPLEMENT_INTERFACE (G_TYPE_POLLABLE_OUTPUT_STREAM, g_socket_output_stream_pollable_iface_init)
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G_IMPLEMENT_INTERFACE (G_TYPE_FILE_DESCRIPTOR_BASED, g_socket_output_stream_file_descriptor_based_iface_init)
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)
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#else
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G_DEFINE_TYPE_WITH_CODE (GSocketOutputStream, g_socket_output_stream, G_TYPE_OUTPUT_STREAM,
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G_ADD_PRIVATE (GSocketOutputStream)
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G_IMPLEMENT_INTERFACE (G_TYPE_POLLABLE_OUTPUT_STREAM, g_socket_output_stream_pollable_iface_init)
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)
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#endif
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enum
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{
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PROP_0,
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PROP_SOCKET
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};
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static void
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g_socket_output_stream_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GSocketOutputStream *stream = G_SOCKET_OUTPUT_STREAM (object);
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switch (prop_id)
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{
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case PROP_SOCKET:
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g_value_set_object (value, stream->priv->socket);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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g_socket_output_stream_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GSocketOutputStream *stream = G_SOCKET_OUTPUT_STREAM (object);
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switch (prop_id)
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{
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case PROP_SOCKET:
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stream->priv->socket = g_value_dup_object (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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g_socket_output_stream_finalize (GObject *object)
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{
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GSocketOutputStream *stream = G_SOCKET_OUTPUT_STREAM (object);
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if (stream->priv->socket)
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g_object_unref (stream->priv->socket);
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G_OBJECT_CLASS (g_socket_output_stream_parent_class)->finalize (object);
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}
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static gssize
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g_socket_output_stream_write (GOutputStream *stream,
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const void *buffer,
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gsize count,
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GCancellable *cancellable,
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GError **error)
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{
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GSocketOutputStream *output_stream = G_SOCKET_OUTPUT_STREAM (stream);
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return g_socket_send_with_blocking (output_stream->priv->socket,
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buffer, count, TRUE,
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cancellable, error);
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}
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static gboolean
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g_socket_output_stream_writev (GOutputStream *stream,
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const GOutputVector *vectors,
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gsize n_vectors,
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gsize *bytes_written,
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GCancellable *cancellable,
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GError **error)
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{
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GSocketOutputStream *output_stream = G_SOCKET_OUTPUT_STREAM (stream);
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GPollableReturn res;
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/* Clamp the number of vectors if more given than we can write in one go.
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* The caller has to handle short writes anyway.
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*/
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if (n_vectors > G_IOV_MAX)
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n_vectors = G_IOV_MAX;
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res = g_socket_send_message_with_timeout (output_stream->priv->socket, NULL,
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vectors, n_vectors,
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NULL, 0, G_SOCKET_MSG_NONE,
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-1, bytes_written,
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cancellable, error);
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/* we have a non-zero timeout so this can't happen */
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g_assert (res != G_POLLABLE_RETURN_WOULD_BLOCK);
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return res == G_POLLABLE_RETURN_OK;
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}
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static gboolean
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g_socket_output_stream_pollable_is_writable (GPollableOutputStream *pollable)
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{
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GSocketOutputStream *output_stream = G_SOCKET_OUTPUT_STREAM (pollable);
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return g_socket_condition_check (output_stream->priv->socket, G_IO_OUT);
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}
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static gssize
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g_socket_output_stream_pollable_write_nonblocking (GPollableOutputStream *pollable,
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const void *buffer,
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gsize size,
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GError **error)
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{
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GSocketOutputStream *output_stream = G_SOCKET_OUTPUT_STREAM (pollable);
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return g_socket_send_with_blocking (output_stream->priv->socket,
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buffer, size, FALSE,
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NULL, error);
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}
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static GPollableReturn
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g_socket_output_stream_pollable_writev_nonblocking (GPollableOutputStream *pollable,
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const GOutputVector *vectors,
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gsize n_vectors,
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gsize *bytes_written,
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GError **error)
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{
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GSocketOutputStream *output_stream = G_SOCKET_OUTPUT_STREAM (pollable);
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/* Clamp the number of vectors if more given than we can write in one go.
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* The caller has to handle short writes anyway.
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*/
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if (n_vectors > G_IOV_MAX)
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n_vectors = G_IOV_MAX;
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return g_socket_send_message_with_timeout (output_stream->priv->socket,
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NULL, vectors, n_vectors,
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NULL, 0, G_SOCKET_MSG_NONE, 0,
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bytes_written, NULL, error);
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}
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static GSource *
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g_socket_output_stream_pollable_create_source (GPollableOutputStream *pollable,
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GCancellable *cancellable)
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{
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GSocketOutputStream *output_stream = G_SOCKET_OUTPUT_STREAM (pollable);
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GSource *socket_source, *pollable_source;
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pollable_source = g_pollable_source_new (G_OBJECT (output_stream));
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socket_source = g_socket_create_source (output_stream->priv->socket,
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G_IO_OUT, cancellable);
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g_source_set_dummy_callback (socket_source);
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g_source_add_child_source (pollable_source, socket_source);
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g_source_unref (socket_source);
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return pollable_source;
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}
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#ifdef G_OS_UNIX
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static int
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g_socket_output_stream_get_fd (GFileDescriptorBased *fd_based)
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{
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GSocketOutputStream *output_stream = G_SOCKET_OUTPUT_STREAM (fd_based);
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return g_socket_get_fd (output_stream->priv->socket);
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}
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#endif
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static void
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g_socket_output_stream_class_init (GSocketOutputStreamClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GOutputStreamClass *goutputstream_class = G_OUTPUT_STREAM_CLASS (klass);
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gobject_class->finalize = g_socket_output_stream_finalize;
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gobject_class->get_property = g_socket_output_stream_get_property;
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gobject_class->set_property = g_socket_output_stream_set_property;
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goutputstream_class->write_fn = g_socket_output_stream_write;
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goutputstream_class->writev_fn = g_socket_output_stream_writev;
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g_object_class_install_property (gobject_class, PROP_SOCKET,
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g_param_spec_object ("socket",
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P_("socket"),
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P_("The socket that this stream wraps"),
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G_TYPE_SOCKET, G_PARAM_CONSTRUCT_ONLY |
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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#ifdef G_OS_UNIX
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static void
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g_socket_output_stream_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface)
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{
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iface->get_fd = g_socket_output_stream_get_fd;
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}
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#endif
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static void
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g_socket_output_stream_pollable_iface_init (GPollableOutputStreamInterface *iface)
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{
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iface->is_writable = g_socket_output_stream_pollable_is_writable;
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iface->create_source = g_socket_output_stream_pollable_create_source;
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iface->write_nonblocking = g_socket_output_stream_pollable_write_nonblocking;
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iface->writev_nonblocking = g_socket_output_stream_pollable_writev_nonblocking;
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}
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static void
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g_socket_output_stream_init (GSocketOutputStream *stream)
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{
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stream->priv = g_socket_output_stream_get_instance_private (stream);
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}
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GSocketOutputStream *
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_g_socket_output_stream_new (GSocket *socket)
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{
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return g_object_new (G_TYPE_SOCKET_OUTPUT_STREAM, "socket", socket, NULL);
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}
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