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address-pool: add object to manage multicast addresses

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Make an object that can manage a rage of multicast addresses and ports.
This commit is contained in:
Wim Taymans 2012-11-14 15:49:06 +01:00
parent 7d6e4606fa
commit b30202b174
3 changed files with 515 additions and 0 deletions
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2
gst/rtsp-server/Makefile.am
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@ -1,5 +1,6 @@
public_headers = \
rtsp-auth.h \
rtsp-address-pool.h \
rtsp-params.h \
rtsp-sdp.h \
rtsp-media.h \
@ -16,6 +17,7 @@ public_headers = \
c_sources = \
rtsp-auth.c \
rtsp-address-pool.c \
rtsp-params.c \
rtsp-sdp.c \
rtsp-media.c \

428
gst/rtsp-server/rtsp-address-pool.c Normal file
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@ -0,0 +1,428 @@
/* 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);
}

85
gst/rtsp-server/rtsp-address-pool.h Normal file
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@ -0,0 +1,85 @@
/* 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__ */