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Commit 3f4841ff authored by Marek Lindner's avatar Marek Lindner Committed by Antonio Quartulli
Browse files

batman-adv: tvlv - add network coding container 



Create network coding container to announce network coding
capabilities (if enabled).

Signed-off-by: default avatarMarek Lindner <lindner_marek@yahoo.de>
Signed-off-by: default avatarAntonio Quartulli <antonio@meshcoding.com>
parent 17cf0ea4

net/batman-adv/network-coding.c

+63 −0
Original line number Diff line number Diff line
@@ -58,6 +58,59 @@ static void batadv_nc_start_timer(struct batadv_priv *bat_priv) 
			   msecs_to_jiffies(10));

}



/**

 * batadv_nc_tvlv_container_update - update the network coding tvlv container

 *  after network coding setting change

 * @bat_priv: the bat priv with all the soft interface information

 */

static void batadv_nc_tvlv_container_update(struct batadv_priv *bat_priv)

{

	char nc_mode;



	nc_mode = atomic_read(&bat_priv->network_coding);



	switch (nc_mode) {

	case 0:

		batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_NC, 1);

		break;

	case 1:

		batadv_tvlv_container_register(bat_priv, BATADV_TVLV_NC, 1,

					       NULL, 0);

		break;

	}

}



/**

 * batadv_nc_status_update - update the network coding tvlv container after

 *  network coding setting change

 * @net_dev: the soft interface net device

 */

void batadv_nc_status_update(struct net_device *net_dev)

{

	struct batadv_priv *bat_priv = netdev_priv(net_dev);

	batadv_nc_tvlv_container_update(bat_priv);

}



/**

 * batadv_nc_tvlv_ogm_handler_v1 - process incoming nc tvlv container

 * @bat_priv: the bat priv with all the soft interface information

 * @orig: the orig_node of the ogm

 * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)

 * @tvlv_value: tvlv buffer containing the gateway data

 * @tvlv_value_len: tvlv buffer length

 */

static void batadv_nc_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,

					  struct batadv_orig_node *orig,

					  uint8_t flags,

					  void *tvlv_value,

					  uint16_t tvlv_value_len)

{

	if (flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND)

		orig->capabilities &= ~BATADV_ORIG_CAPA_HAS_NC;

	else

		orig->capabilities |= BATADV_ORIG_CAPA_HAS_NC;

}



/**

 * batadv_nc_mesh_init - initialise coding hash table and start house keeping

 * @bat_priv: the bat priv with all the soft interface information
@@ -87,6 +140,10 @@ int batadv_nc_mesh_init(struct batadv_priv *bat_priv) 
	INIT_DELAYED_WORK(&bat_priv->nc.work, batadv_nc_worker);

	batadv_nc_start_timer(bat_priv);



	batadv_tvlv_handler_register(bat_priv, batadv_nc_tvlv_ogm_handler_v1,

				     NULL, BATADV_TVLV_NC, 1,

				     BATADV_TVLV_HANDLER_OGM_CIFNOTFND);

	batadv_nc_tvlv_container_update(bat_priv);

	return 0;



err:
@@ -802,6 +859,10 @@ void batadv_nc_update_nc_node(struct batadv_priv *bat_priv, 
	if (!atomic_read(&bat_priv->network_coding))

		goto out;



	/* check if orig node is network coding enabled */

	if (!(orig_node->capabilities & BATADV_ORIG_CAPA_HAS_NC))

		goto out;



	/* accept ogms from 'good' neighbors and single hop neighbors */

	if (!batadv_can_nc_with_orig(bat_priv, orig_node, ogm_packet) &&

	    !is_single_hop_neigh)
@@ -1735,6 +1796,8 @@ static int batadv_nc_recv_coded_packet(struct sk_buff *skb, 
 */

void batadv_nc_mesh_free(struct batadv_priv *bat_priv)

{

	batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_NC, 1);

	batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_NC, 1);

	cancel_delayed_work_sync(&bat_priv->nc.work);



	batadv_nc_purge_paths(bat_priv, bat_priv->nc.coding_hash, NULL);

net/batman-adv/network-coding.h

+5 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 


#ifdef CONFIG_BATMAN_ADV_NC



void batadv_nc_status_update(struct net_device *net_dev);

int batadv_nc_init(void);

int batadv_nc_mesh_init(struct batadv_priv *bat_priv);

void batadv_nc_mesh_free(struct batadv_priv *bat_priv);
@@ -47,6 +48,10 @@ int batadv_nc_init_debugfs(struct batadv_priv *bat_priv); 


#else /* ifdef CONFIG_BATMAN_ADV_NC */



static inline void batadv_nc_status_update(struct net_device *net_dev)

{

}



static inline int batadv_nc_init(void)

{

	return 0;

net/batman-adv/packet.h

+2 −0
Original line number Diff line number Diff line
@@ -122,10 +122,12 @@ enum batadv_bla_claimframe { 
 * enum batadv_tvlv_type - tvlv type definitions

 * @BATADV_TVLV_GW: gateway tvlv

 * @BATADV_TVLV_DAT: distributed arp table tvlv

 * @BATADV_TVLV_NC: network coding tvlv

 */

enum batadv_tvlv_type {

	BATADV_TVLV_GW		= 0x01,

	BATADV_TVLV_DAT		= 0x02,

	BATADV_TVLV_NC		= 0x03,

};



/* the destination hardware field in the ARP frame is used to

net/batman-adv/sysfs.c

+3 −1
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include "sysfs.h"

#include "translation-table.h"

#include "distributed-arp-table.h"

#include "network-coding.h"

#include "originator.h"

#include "hard-interface.h"

#include "gateway_common.h"
@@ -447,7 +448,8 @@ static BATADV_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, batadv_show_gw_bwidth, 
BATADV_ATTR_SIF_UINT(log_level, S_IRUGO | S_IWUSR, 0, BATADV_DBG_ALL, NULL);

#endif

#ifdef CONFIG_BATMAN_ADV_NC

BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR, NULL);

BATADV_ATTR_SIF_BOOL(network_coding, S_IRUGO | S_IWUSR,

		     batadv_nc_status_update);

#endif



static struct batadv_attribute *batadv_mesh_attrs[] = {

net/batman-adv/types.h

+2 −0
Original line number Diff line number Diff line
@@ -188,9 +188,11 @@ struct batadv_orig_node { 
/**

 * enum batadv_orig_capabilities - orig node capabilities

 * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table enabled

 * @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled

 */

enum batadv_orig_capabilities {

	BATADV_ORIG_CAPA_HAS_DAT = BIT(0),

	BATADV_ORIG_CAPA_HAS_NC = BIT(1),

};



/**