gstreamer/gst/tcp/gsttcpserversrc.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst-i18n-plugin.h>
#include "gsttcp.h"
#include "gsttcpserversrc.h"
#include <unistd.h>
#include <sys/ioctl.h>
#ifdef HAVE_FIONREAD_IN_SYS_FILIO
#include <sys/filio.h>
#endif
GST_DEBUG_CATEGORY (tcpserversrc_debug);
#define GST_CAT_DEFAULT tcpserversrc_debug
#define TCP_DEFAULT_PORT 4953
#define TCP_DEFAULT_HOST NULL /* listen on all interfaces */
#define TCP_BACKLOG 1 /* client connection queue */
/* elementfactory information */
static GstElementDetails gst_tcpserversrc_details =
GST_ELEMENT_DETAILS ("TCP Server source",
"Source/Network",
"Receive data as a server over the network via TCP",
"Thomas Vander Stichele <thomas at apestaart dot org>");
/* TCPServerSrc signals and args */
enum
{
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_HOST,
ARG_PORT,
ARG_PROTOCOL
};
static void gst_tcpserversrc_base_init (gpointer g_class);
static void gst_tcpserversrc_class_init (GstTCPServerSrc * klass);
static void gst_tcpserversrc_init (GstTCPServerSrc * tcpserversrc);
static GstData *gst_tcpserversrc_get (GstPad * pad);
static GstElementStateReturn gst_tcpserversrc_change_state (GstElement *
element);
static void gst_tcpserversrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_tcpserversrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_tcpserversrc_set_clock (GstElement * element, GstClock * clock);
static GstElementClass *parent_class = NULL;
/*static guint gst_tcpserversrc_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_tcpserversrc_get_type (void)
{
static GType tcpserversrc_type = 0;
if (!tcpserversrc_type) {
static const GTypeInfo tcpserversrc_info = {
sizeof (GstTCPServerSrcClass),
gst_tcpserversrc_base_init,
NULL,
(GClassInitFunc) gst_tcpserversrc_class_init,
NULL,
NULL,
sizeof (GstTCPServerSrc),
0,
(GInstanceInitFunc) gst_tcpserversrc_init,
NULL
};
tcpserversrc_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstTCPServerSrc",
&tcpserversrc_info, 0);
}
return tcpserversrc_type;
}
static void
gst_tcpserversrc_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_tcpserversrc_details);
}
static void
gst_tcpserversrc_class_init (GstTCPServerSrc * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HOST,
g_param_spec_string ("host", "Host", "The hostname to listen",
TCP_DEFAULT_HOST, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PORT,
g_param_spec_int ("port", "Port", "The port to listen to",
0, 32768, TCP_DEFAULT_PORT, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_PROTOCOL,
g_param_spec_enum ("protocol", "Protocol", "The protocol to wrap data in",
GST_TYPE_TCP_PROTOCOL_TYPE, GST_TCP_PROTOCOL_TYPE_NONE,
G_PARAM_READWRITE));
gobject_class->set_property = gst_tcpserversrc_set_property;
gobject_class->get_property = gst_tcpserversrc_get_property;
gstelement_class->change_state = gst_tcpserversrc_change_state;
gstelement_class->set_clock = gst_tcpserversrc_set_clock;
GST_DEBUG_CATEGORY_INIT (tcpserversrc_debug, "tcpserversrc", 0,
"TCP Server Source");
}
static void
gst_tcpserversrc_set_clock (GstElement * element, GstClock * clock)
{
GstTCPServerSrc *tcpserversrc;
tcpserversrc = GST_TCPSERVERSRC (element);
tcpserversrc->clock = clock;
}
static void
gst_tcpserversrc_init (GstTCPServerSrc * this)
{
/* create the src pad */
this->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (this), this->srcpad);
gst_pad_set_get_function (this->srcpad, gst_tcpserversrc_get);
this->server_port = TCP_DEFAULT_PORT;
this->host = TCP_DEFAULT_HOST;
this->clock = NULL;
this->server_sock_fd = -1;
this->client_sock_fd = -1;
this->curoffset = 0;
this->protocol = GST_TCP_PROTOCOL_TYPE_NONE;
GST_FLAG_UNSET (this, GST_TCPSERVERSRC_OPEN);
}
/* read the gdp caps packet from the socket */
static GstCaps *
gst_tcpserversrc_gdp_read_caps (GstTCPServerSrc * this)
{
size_t header_length = GST_DP_HEADER_LENGTH;
size_t readsize;
guint8 *header = NULL;
guint8 *payload = NULL;
ssize_t ret;
GstCaps *caps;
gchar *string;
header = g_malloc (header_length);
readsize = header_length;
GST_LOG_OBJECT (this, "Reading %d bytes for caps packet header", readsize);
ret = read (this->client_sock_fd, header, readsize);
if (ret < 0) {
GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
g_free (header);
return NULL;
}
g_assert (ret == readsize);
if (!gst_dp_validate_header (header_length, header)) {
GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL),
("GDP caps packet header does not validate"));
g_free (header);
return NULL;
}
readsize = gst_dp_header_payload_length (header);
payload = g_malloc (readsize);
GST_LOG_OBJECT (this, "Reading %d bytes for caps packet payload", readsize);
ret = read (this->client_sock_fd, payload, readsize);
if (ret < 0) {
GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
g_free (header);
g_free (payload);
return NULL;
}
g_assert (ret == readsize);
if (!gst_dp_validate_payload (readsize, header, payload)) {
GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL),
("GDP caps packet payload does not validate"));
g_free (header);
g_free (payload);
return NULL;
}
caps = gst_dp_caps_from_packet (header_length, header, payload);
string = gst_caps_to_string (caps);
GST_DEBUG_OBJECT (this, "retrieved GDP caps from packet payload: %s", string);
g_free (string);
g_free (header);
g_free (payload);
return caps;
}
/* read the gdp buffer header from the socket
* returns a GstData,
* representing the new GstBuffer to read data into, or an EOS event
*/
static GstData *
gst_tcpserversrc_gdp_read_header (GstTCPServerSrc * this)
{
size_t header_length = GST_DP_HEADER_LENGTH;
size_t readsize;
guint8 *header = NULL;
ssize_t ret;
GstBuffer *buffer;
header = g_malloc (header_length);
readsize = header_length;
GST_LOG_OBJECT (this, "Reading %d bytes for buffer packet header", readsize);
ret = read (this->client_sock_fd, header, readsize);
/* if we read 0 bytes, and we're blocking, we hit eos */
if (ret == 0) {
GST_DEBUG ("blocking read returns 0, EOS");
gst_element_set_eos (GST_ELEMENT (this));
g_free (header);
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
if (ret < 0) {
GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
g_free (header);
return NULL;
}
if (ret != readsize) {
g_warning ("Wanted %d bytes, got %d bytes", (int) readsize, (int) ret);
}
g_assert (ret == readsize);
if (!gst_dp_validate_header (header_length, header)) {
GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL),
("GDP buffer packet header does not validate"));
g_free (header);
return NULL;
}
GST_LOG_OBJECT (this, "validated buffer packet header");
buffer = gst_dp_buffer_from_header (header_length, header);
GST_LOG_OBJECT (this, "created new buffer %p from packet header", buffer);
return GST_DATA (buffer);
}
static GstData *
gst_tcpserversrc_get (GstPad * pad)
{
GstTCPServerSrc *src;
size_t readsize;
int ret;
GstData *data = NULL;
GstBuffer *buf = NULL;
GstCaps *caps;
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
src = GST_TCPSERVERSRC (GST_OBJECT_PARENT (pad));
g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_TCPSERVERSRC_OPEN), NULL);
/* read the buffer header if we're using a protocol */
switch (src->protocol) {
fd_set testfds;
case GST_TCP_PROTOCOL_TYPE_NONE:
/* do a blocking select on the socket */
FD_ZERO (&testfds);
FD_SET (src->client_sock_fd, &testfds);
ret =
select (src->client_sock_fd + 1, &testfds, (fd_set *) 0, (fd_set *) 0,
0);
/* no action (0) is an error too in our case */
if (ret <= 0) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("select failed: %s", g_strerror (errno)));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
/* ask how much is available for reading on the socket */
ret = ioctl (src->client_sock_fd, FIONREAD, &readsize);
if (ret < 0) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("ioctl failed: %s", g_strerror (errno)));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
buf = gst_buffer_new_and_alloc (readsize);
break;
case GST_TCP_PROTOCOL_TYPE_GDP:
/* if we haven't received caps yet, we should get them first */
if (!src->caps_received) {
gchar *string;
if (!(caps = gst_tcpserversrc_gdp_read_caps (src))) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not read caps through GDP"));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
src->caps_received = TRUE;
string = gst_caps_to_string (caps);
GST_DEBUG_OBJECT (src, "Received caps through GDP: %s", string);
g_free (string);
if (!gst_pad_try_set_caps (pad, caps)) {
g_warning ("Could not set caps");
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
}
/* now receive the buffer header */
if (!(data = gst_tcpserversrc_gdp_read_header (src))) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not read data header through GDP"));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
if (GST_IS_EVENT (data))
return data;
buf = GST_BUFFER (data);
GST_LOG_OBJECT (src, "Going to read data from socket into buffer %p",
buf);
/* use this new buffer to read data into */
readsize = GST_BUFFER_SIZE (buf);
break;
default:
g_warning ("Unhandled protocol type");
break;
}
GST_LOG_OBJECT (src, "Reading %d bytes", readsize);
ret =
gst_tcp_socket_read (src->client_sock_fd, GST_BUFFER_DATA (buf),
readsize);
if (ret < 0) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
gst_buffer_unref (buf);
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
/* if we read 0 bytes, and we're blocking, we hit eos */
if (ret == 0) {
GST_DEBUG ("blocking read returns 0, EOS");
gst_buffer_unref (buf);
gst_element_set_eos (GST_ELEMENT (src));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
readsize = ret;
GST_LOG_OBJECT (src, "Read %d bytes", readsize);
GST_BUFFER_SIZE (buf) = readsize;
GST_BUFFER_MAXSIZE (buf) = readsize;
GST_BUFFER_OFFSET (buf) = src->curoffset;
GST_BUFFER_OFFSET_END (buf) = src->curoffset + readsize;
src->curoffset += readsize;
return GST_DATA (buf);
}
static void
gst_tcpserversrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstTCPServerSrc *tcpserversrc;
g_return_if_fail (GST_IS_TCPSERVERSRC (object));
tcpserversrc = GST_TCPSERVERSRC (object);
switch (prop_id) {
case ARG_HOST:
g_free (tcpserversrc->host);
tcpserversrc->host = g_strdup (g_value_get_string (value));
break;
case ARG_PORT:
tcpserversrc->server_port = g_value_get_int (value);
break;
case ARG_PROTOCOL:
tcpserversrc->protocol = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_tcpserversrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstTCPServerSrc *tcpserversrc;
g_return_if_fail (GST_IS_TCPSERVERSRC (object));
tcpserversrc = GST_TCPSERVERSRC (object);
switch (prop_id) {
case ARG_HOST:
g_value_set_string (value, tcpserversrc->host);
break;
case ARG_PORT:
g_value_set_int (value, tcpserversrc->server_port);
break;
case ARG_PROTOCOL:
g_value_set_enum (value, tcpserversrc->protocol);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* set up server */
static gboolean
gst_tcpserversrc_init_receive (GstTCPServerSrc * this)
{
int ret, error;
struct addrinfo hints, *res, *ressave;
gchar *tempport;
struct sockaddr_storage client_address;
int client_address_len;
/* name the socket */
memset (&hints, 0, sizeof (struct addrinfo));
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
tempport = g_strdup_printf ("%d", this->server_port);
error = getaddrinfo (this->host, tempport, &hints, &res);
g_free (tempport);
if (error != 0) {
GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL),
("getaddrinfo failed: %s", gai_strerror (error)));
return FALSE;
}
ressave = res;
/* Try open socket with each address getaddrinfo returned, until getting
a valid listening socket */
this->server_sock_fd = -1;
while (res) {
this->server_sock_fd =
socket (res->ai_family, res->ai_socktype, res->ai_protocol);
if (this->server_sock_fd >= 0) {
ret = bind (this->server_sock_fd, res->ai_addr, res->ai_addrlen);
if (ret == 0)
break;
close (this->server_sock_fd);
this->server_sock_fd = -1;
}
res = res->ai_next;
}
freeaddrinfo (ressave);
if (this->server_sock_fd < 0) {
GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL),
("bind failed: %s", g_strerror (errno)));
return FALSE;
}
/* make address reusable */
if (setsockopt (this->server_sock_fd, SOL_SOCKET, SO_REUSEADDR, &ret,
sizeof (int)) < 0) {
GST_ELEMENT_ERROR (this, RESOURCE, SETTINGS, (NULL),
("Could not setsockopt: %s", g_strerror (errno)));
return FALSE;
}
/* reset caps_received flag */
this->caps_received = FALSE;
GST_DEBUG_OBJECT (this, "listening on server socket %d with queue of %d",
this->server_sock_fd, TCP_BACKLOG);
if (listen (this->server_sock_fd, TCP_BACKLOG) == -1) {
GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL),
("Could not listen on server socket: %s", g_strerror (errno)));
return FALSE;
}
/* FIXME: maybe we should think about moving actual client accepting
somewhere else */
GST_DEBUG_OBJECT (this, "waiting for client");
this->client_sock_fd =
accept (this->server_sock_fd, (struct sockaddr *) &client_address,
&client_address_len);
if (this->client_sock_fd == -1) {
GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL),
("Could not accept client on server socket: %s", g_strerror (errno)));
return FALSE;
}
GST_DEBUG_OBJECT (this, "received client");
GST_FLAG_SET (this, GST_TCPSERVERSRC_OPEN);
return TRUE;
}
static void
gst_tcpserversrc_close (GstTCPServerSrc * this)
{
if (this->server_sock_fd != -1) {
close (this->server_sock_fd);
this->server_sock_fd = -1;
}
if (this->client_sock_fd != -1) {
close (this->client_sock_fd);
this->client_sock_fd = -1;
}
GST_FLAG_UNSET (this, GST_TCPSERVERSRC_OPEN);
}
static GstElementStateReturn
gst_tcpserversrc_change_state (GstElement * element)
{
g_return_val_if_fail (GST_IS_TCPSERVERSRC (element), GST_STATE_FAILURE);
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_FLAG_IS_SET (element, GST_TCPSERVERSRC_OPEN))
gst_tcpserversrc_close (GST_TCPSERVERSRC (element));
} else {
if (!GST_FLAG_IS_SET (element, GST_TCPSERVERSRC_OPEN)) {
if (!gst_tcpserversrc_init_receive (GST_TCPSERVERSRC (element)))
return GST_STATE_FAILURE;
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}