--- /dev/null
+/* GStreamer
+ * Copyright (C) 2012 Wim Taymans <wim.taymans at gmail.com>
+ *
+ * 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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <string.h>
+#include <gio/gio.h>
+
+#include "rtsp-address-pool.h"
+
+GST_DEBUG_CATEGORY_STATIC (rtsp_address_pool_debug);
+#define GST_CAT_DEFAULT rtsp_address_pool_debug
+
+#define GST_RTSP_ADDRESS_POOL_GET_PRIVATE(obj) \
+ (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_RTSP_ADDRESS_POOL, GstRTSPAddressPoolPrivate))
+
+struct _GstRTSPAddressPoolPrivate
+{
+ GMutex lock;
+ GList *addresses;
+ GList *allocated;
+};
+
+#define ADDR_IS_IPV4(a) ((a)->size == 4)
+#define ADDR_IS_IPV6(a) ((a)->size == 16)
+#define ADDR_IS_EVEN_PORT(a) (((a)->port & 1) == 0)
+
+typedef struct
+{
+ guint8 bytes[16];
+ gsize size;
+ guint16 port;
+} Addr;
+
+typedef struct
+{
+ Addr min;
+ Addr max;
+ guint8 ttl;
+} AddrRange;
+
+#define RANGE_IS_SINGLE(r) (memcmp ((r)->min.bytes, (r)->max.bytes, (r)->min.size) == 0)
+
+#define gst_rtsp_address_pool_parent_class parent_class
+G_DEFINE_TYPE (GstRTSPAddressPool, gst_rtsp_address_pool, G_TYPE_OBJECT);
+
+static void gst_rtsp_address_pool_finalize (GObject * obj);
+
+static void
+gst_rtsp_address_pool_class_init (GstRTSPAddressPoolClass * klass)
+{
+ GObjectClass *gobject_class;
+
+ gobject_class = G_OBJECT_CLASS (klass);
+
+ gobject_class->finalize = gst_rtsp_address_pool_finalize;
+
+ g_type_class_add_private (klass, sizeof (GstRTSPAddressPoolPrivate));
+
+ GST_DEBUG_CATEGORY_INIT (rtsp_address_pool_debug, "rtspaddresspool", 0,
+ "GstRTSPAddressPool");
+}
+
+static void
+gst_rtsp_address_pool_init (GstRTSPAddressPool * pool)
+{
+ pool->priv = GST_RTSP_ADDRESS_POOL_GET_PRIVATE (pool);
+
+ g_mutex_init (&pool->priv->lock);
+}
+
+static void
+free_range (AddrRange * range)
+{
+ g_slice_free (AddrRange, range);
+}
+
+static void
+gst_rtsp_address_pool_finalize (GObject * obj)
+{
+ GstRTSPAddressPool *pool;
+
+ pool = GST_RTSP_ADDRESS_POOL (obj);
+
+ g_list_free_full (pool->priv->addresses, (GDestroyNotify) free_range);
+ g_list_free_full (pool->priv->allocated, (GDestroyNotify) free_range);
+ g_mutex_clear (&pool->priv->lock);
+
+ G_OBJECT_CLASS (parent_class)->finalize (obj);
+}
+
+/**
+ * gst_rtsp_address_pool_new:
+ *
+ * Make a new #GstRTSPAddressPool.
+ *
+ * Returns: a new #GstRTSPAddressPool
+ */
+GstRTSPAddressPool *
+gst_rtsp_address_pool_new (void)
+{
+ GstRTSPAddressPool *pool;
+
+ pool = g_object_new (GST_TYPE_RTSP_ADDRESS_POOL, NULL);
+
+ return pool;
+}
+
+static gboolean
+fill_address (const gchar * address, guint16 port, Addr * addr)
+{
+ GInetAddress *inet;
+
+ inet = g_inet_address_new_from_string (address);
+ if (inet == NULL)
+ return FALSE;
+
+ addr->size = g_inet_address_get_native_size (inet);
+ memcpy (addr->bytes, g_inet_address_to_bytes (inet), addr->size);
+ g_object_unref (inet);
+ addr->port = port;
+
+ return TRUE;
+}
+
+/**
+ * gst_rtsp_address_pool_add_range:
+ * @pool: a #GstRTSPAddressPool
+ * @min_address: a minimum address to add
+ * @max_address: a maximum address to add
+ * @min_port: the minimum port
+ * @max_port: the maximum port
+ * @ttl: a TTL
+ *
+ * Adds the multicast addresses from @min_addess to @max_address (inclusive)
+ * to @pool. The valid port range for the addresses will be from @min_port to
+ * @max_port inclusive.
+ *
+ * Returns: %TRUE if the addresses could be added.
+ */
+gboolean
+gst_rtsp_address_pool_add_range (GstRTSPAddressPool * pool,
+ const gchar * min_address, const gchar * max_address,
+ guint16 min_port, guint16 max_port, guint8 ttl)
+{
+ AddrRange *range;
+ GstRTSPAddressPoolPrivate *priv;
+
+ g_return_val_if_fail (GST_IS_RTSP_ADDRESS_POOL (pool), FALSE);
+ g_return_val_if_fail (min_port <= max_port, FALSE);
+
+ priv = pool->priv;
+
+ range = g_slice_new0 (AddrRange);
+
+ if (!fill_address (min_address, min_port, &range->min))
+ goto invalid;
+ if (!fill_address (max_address, max_port, &range->max))
+ goto invalid;
+
+ if (range->min.size != range->max.size)
+ goto invalid;
+ if (memcmp (range->min.bytes, range->max.bytes, range->min.size) > 0)
+ goto invalid;
+
+ range->ttl = ttl;
+
+ GST_DEBUG_OBJECT (pool, "adding %s-%s:%u-%u ttl %u", min_address, max_address,
+ min_port, max_port, ttl);
+
+ g_mutex_lock (&priv->lock);
+ priv->addresses = g_list_prepend (priv->addresses, range);
+ g_mutex_unlock (&priv->lock);
+
+ return TRUE;
+
+ /* ERRORS */
+invalid:
+ {
+ GST_ERROR_OBJECT (pool, "invalid address range %s-%s", min_address,
+ max_address);
+ g_slice_free (AddrRange, range);
+ return FALSE;
+ }
+}
+
+static void
+inc_address (GstRTSPAddressPool * pool, Addr * addr)
+{
+ gint i;
+ guint carry;
+
+ carry = 1;
+ for (i = addr->size - 1; i >= 0 && carry > 0; i--) {
+ carry += addr->bytes[i];
+ addr->bytes[i] = carry & 0xff;
+ carry >>= 8;
+ }
+}
+
+static AddrRange *
+split_range (GstRTSPAddressPool * pool, AddrRange * range, gint skip,
+ gint n_ports)
+{
+ GstRTSPAddressPoolPrivate *priv = pool->priv;
+ AddrRange *temp;
+
+ if (!RANGE_IS_SINGLE (range)) {
+ /* min and max are not the same, we have more than one address. */
+ temp = g_slice_dup (AddrRange, range);
+ /* increment the range min address */
+ inc_address (pool, &temp->min);
+ /* and store back in pool */
+ priv->addresses = g_list_prepend (priv->addresses, temp);
+
+ /* adjust range with only the first address */
+ memcpy (range->max.bytes, range->min.bytes, range->min.size);
+ }
+
+ /* range now contains only one single address */
+ if (skip > 0) {
+ /* make a range with the skipped ports */
+ temp = g_slice_dup (AddrRange, range);
+ temp->max.port = temp->min.port + skip;
+ /* and store back in pool */
+ priv->addresses = g_list_prepend (priv->addresses, temp);
+
+ /* increment range port */
+ range->min.port += skip;
+ }
+ /* range now contains single address with desired port number */
+ if (range->max.port - range->min.port + 1 > n_ports) {
+ /* make a range with the remaining ports */
+ temp = g_slice_dup (AddrRange, range);
+ temp->min.port += n_ports;
+ /* and store back in pool */
+ priv->addresses = g_list_prepend (priv->addresses, temp);
+
+ /* and truncate port */
+ range->max.port = range->min.port + n_ports - 1;
+ }
+ return range;
+}
+
+/**
+ * gst_rtsp_address_pool_acquire_address:
+ * @pool: a #GstRTSPAddressPool
+ * @flags: flags
+ * @n_ports: the amount of ports
+ * @address: result address
+ * @port: result port
+ * @ttl: result TTL
+ *
+ * Take an address and ports from @pool. @flags can be used to control the
+ * allocation. @n_ports consecutive ports will be allocated of which the first
+ * one can be found in @port.
+ *
+ * Returns: a pointer that should be used to release the address with
+ * gst_rtsp_address_pool_release_address() after usage or %NULL when no
+ * address could be acquired.
+ */
+gpointer
+gst_rtsp_address_pool_acquire_address (GstRTSPAddressPool * pool,
+ GstRTSPAddressFlags flags, gint n_ports, gchar ** address,
+ guint16 * port, guint8 * ttl)
+{
+ GstRTSPAddressPoolPrivate *priv;
+ GList *walk, *next;
+ AddrRange *result;
+
+ g_return_val_if_fail (GST_IS_RTSP_ADDRESS_POOL (pool), NULL);
+ g_return_val_if_fail (n_ports > 0, NULL);
+ g_return_val_if_fail (address != NULL, NULL);
+ g_return_val_if_fail (port != NULL, NULL);
+ g_return_val_if_fail (ttl != NULL, NULL);
+
+ priv = pool->priv;
+ result = NULL;
+
+ g_mutex_lock (&priv->lock);
+ /* go over available ranges */
+ for (walk = priv->addresses; walk; walk = next) {
+ AddrRange *range;
+ gint ports, skip;
+
+ range = walk->data;
+ next = walk->next;
+
+ /* check address type when given */
+ if (flags & GST_RTSP_ADDRESS_FLAG_IPV4 && !ADDR_IS_IPV4 (&range->min))
+ continue;
+ if (flags & GST_RTSP_ADDRESS_FLAG_IPV6 && !ADDR_IS_IPV6 (&range->min))
+ continue;
+
+ /* check for enough ports */
+ ports = range->max.port - range->min.port + 1;
+ if (flags & GST_RTSP_ADDRESS_FLAG_EVEN_PORT
+ && !ADDR_IS_EVEN_PORT (&range->min))
+ skip = 1;
+ else
+ skip = 0;
+ if (ports - skip < n_ports)
+ continue;
+
+ /* we found a range, remove from the list */
+ priv->addresses = g_list_delete_link (priv->addresses, walk);
+ /* now split and exit our loop */
+ result = split_range (pool, range, skip, n_ports);
+ priv->allocated = g_list_prepend (priv->allocated, result);
+ break;
+ }
+ g_mutex_unlock (&priv->lock);
+
+ if (result) {
+ GInetAddress *inet;
+
+ inet = g_inet_address_new_from_bytes (result->min.bytes,
+ result->min.size == 4 ? G_SOCKET_FAMILY_IPV4 : G_SOCKET_FAMILY_IPV6);
+
+ *address = g_inet_address_to_string (inet);
+ g_object_unref (inet);
+
+ *port = result->min.port;
+ *ttl = result->ttl;
+
+ GST_DEBUG_OBJECT (pool, "got address %s:%u ttl %u", *address, *port, *ttl);
+ }
+ return result;
+}
+
+/**
+ * gst_rtsp_address_pool_release_address:
+ * @pool: a #GstRTSPAddressPool
+ * @id: an address id
+ *
+ * Release a previously acquired address (with
+ * gst_rtsp_address_pool_acquire_address()) back into @pool.
+ */
+void
+gst_rtsp_address_pool_release_address (GstRTSPAddressPool * pool, gpointer id)
+{
+ GstRTSPAddressPoolPrivate *priv;
+ GList *find;
+
+ g_return_if_fail (GST_IS_RTSP_ADDRESS_POOL (pool));
+ g_return_if_fail (id != NULL);
+
+ priv = pool->priv;
+
+ g_mutex_lock (&priv->lock);
+ find = g_list_find (priv->allocated, id);
+ if (find == NULL)
+ goto not_found;
+
+ priv->allocated = g_list_delete_link (priv->allocated, find);
+
+ /* FIXME, merge and do something clever */
+ priv->addresses = g_list_prepend (priv->addresses, id);
+ g_mutex_unlock (&priv->lock);
+
+ return;
+
+ /* ERRORS */
+not_found:
+ {
+ g_mutex_unlock (&priv->lock);
+ return;
+ }
+}
+
+static void
+dump_range (GstRTSPAddressPool * pool, AddrRange * range)
+{
+ GInetAddress *inet;
+ gchar *addr1, *addr2;
+
+ inet = g_inet_address_new_from_bytes (range->min.bytes,
+ range->max.size == 4 ? G_SOCKET_FAMILY_IPV4 : G_SOCKET_FAMILY_IPV6);
+ addr1 = g_inet_address_to_string (inet);
+ g_object_unref (inet);
+
+ inet = g_inet_address_new_from_bytes (range->max.bytes,
+ range->max.size == 4 ? G_SOCKET_FAMILY_IPV4 : G_SOCKET_FAMILY_IPV6);
+ addr2 = g_inet_address_to_string (inet);
+ g_object_unref (inet);
+
+ g_print (" address %s-%s, port %u-%u, ttl %u\n", addr1, addr2,
+ range->min.port, range->max.port, range->ttl);
+
+ g_free (addr1);
+ g_free (addr2);
+}
+
+void
+gst_rtsp_address_pool_dump (GstRTSPAddressPool * pool)
+{
+ GstRTSPAddressPoolPrivate *priv;
+ GList *walk;
+
+ g_return_if_fail (GST_IS_RTSP_ADDRESS_POOL (pool));
+
+ priv = pool->priv;
+
+ g_mutex_lock (&priv->lock);
+ g_print ("free:\n");
+ for (walk = priv->addresses; walk; walk = walk->next) {
+ dump_range (pool, (AddrRange *) walk->data);
+ }
+ g_print ("allocated:\n");
+ for (walk = priv->allocated; walk; walk = walk->next) {
+ dump_range (pool, (AddrRange *) walk->data);
+ }
+ g_mutex_unlock (&priv->lock);
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2012 Wim Taymans <wim.taymans at gmail.com>
+ *
+ * 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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <gst/gst.h>
+
+#ifndef __GST_RTSP_ADDRESS_POOL_H__
+#define __GST_RTSP_ADDRESS_POOL_H__
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_RTSP_ADDRESS_POOL (gst_rtsp_address_pool_get_type ())
+#define GST_IS_RTSP_ADDRESS_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_RTSP_ADDRESS_POOL))
+#define GST_IS_RTSP_ADDRESS_POOL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_RTSP_ADDRESS_POOL))
+#define GST_RTSP_ADDRESS_POOL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_RTSP_ADDRESS_POOL, GstRTSPAddressPoolClass))
+#define GST_RTSP_ADDRESS_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_RTSP_ADDRESS_POOL, GstRTSPAddressPool))
+#define GST_RTSP_ADDRESS_POOL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_RTSP_ADDRESS_POOL, GstRTSPAddressPoolClass))
+#define GST_RTSP_ADDRESS_POOL_CAST(obj) ((GstRTSPAddressPool*)(obj))
+#define GST_RTSP_ADDRESS_POOL_CLASS_CAST(klass) ((GstRTSPAddressPoolClass*)(klass))
+
+typedef struct _GstRTSPAddressPool GstRTSPAddressPool;
+typedef struct _GstRTSPAddressPoolClass GstRTSPAddressPoolClass;
+typedef struct _GstRTSPAddressPoolPrivate GstRTSPAddressPoolPrivate;
+
+typedef enum {
+ GST_RTSP_ADDRESS_FLAG_NONE = 0,
+ GST_RTSP_ADDRESS_FLAG_IPV4 = (1 << 0),
+ GST_RTSP_ADDRESS_FLAG_IPV6 = (1 << 1),
+ GST_RTSP_ADDRESS_FLAG_EVEN_PORT = (1 << 2)
+} GstRTSPAddressFlags;
+
+/**
+ * GstRTSPAddressPool:
+ * @parent: the parent GObject
+ *
+ */
+struct _GstRTSPAddressPool {
+ GObject parent;
+
+ GstRTSPAddressPoolPrivate *priv;
+};
+
+struct _GstRTSPAddressPoolClass {
+ GObjectClass parent_class;
+};
+
+GType gst_rtsp_address_pool_get_type (void);
+
+/* create a new address pool */
+GstRTSPAddressPool * gst_rtsp_address_pool_new (void);
+
+void gst_rtsp_address_pool_dump (GstRTSPAddressPool * pool);
+
+gboolean gst_rtsp_address_pool_add_range (GstRTSPAddressPool * pool,
+ const gchar *min_address,
+ const gchar *max_address,
+ guint16 min_port,
+ guint16 max_port,
+ guint8 ttl);
+
+gpointer gst_rtsp_address_pool_acquire_address (GstRTSPAddressPool * pool,
+ GstRTSPAddressFlags flags,
+ gint n_ports,
+ gchar **address,
+ guint16 *port, guint8 *ttl);
+void gst_rtsp_address_pool_release_address (GstRTSPAddressPool * pool,
+ gpointer);
+G_END_DECLS
+
+#endif /* __GST_RTSP_ADDRESS_POOL_H__ */
projects / platform / upstream / gstreamer.git / commitdiff