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batman-adv: tvlv - add distributed arp table container

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Create DAT container to announce DAT capabilities (if enabled).

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
This commit is contained in:
Marek Lindner 2013-04-23 21:39:59 +08:00 committed by Antonio Quartulli
parent 414254e342
commit 17cf0ea455
5 changed files with 83 additions and 1 deletions
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64
net/batman-adv/distributed-arp-table.c
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@ -419,6 +419,10 @@ static bool batadv_is_orig_node_eligible(struct batadv_dat_candidate *res,
bool ret = false;
int j;
/* check if orig node candidate is running DAT */
if (!(candidate->capabilities & BATADV_ORIG_CAPA_HAS_DAT))
goto out;
/* Check if this node has already been selected... */
for (j = 0; j < select; j++)
if (res[j].orig_node == candidate)
@ -625,6 +629,59 @@ static bool batadv_dat_send_data(struct batadv_priv *bat_priv,
return ret;
}
/**
* batadv_dat_tvlv_container_update - update the dat tvlv container after dat
* setting change
* @bat_priv: the bat priv with all the soft interface information
*/
static void batadv_dat_tvlv_container_update(struct batadv_priv *bat_priv)
{
char dat_mode;
dat_mode = atomic_read(&bat_priv->distributed_arp_table);
switch (dat_mode) {
case 0:
batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_DAT, 1);
break;
case 1:
batadv_tvlv_container_register(bat_priv, BATADV_TVLV_DAT, 1,
NULL, 0);
break;
}
}
/**
* batadv_dat_status_update - update the dat tvlv container after dat
* setting change
* @net_dev: the soft interface net device
*/
void batadv_dat_status_update(struct net_device *net_dev)
{
struct batadv_priv *bat_priv = netdev_priv(net_dev);
batadv_dat_tvlv_container_update(bat_priv);
}
/**
* batadv_gw_tvlv_ogm_handler_v1 - process incoming dat 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_dat_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_DAT;
else
orig->capabilities |= BATADV_ORIG_CAPA_HAS_DAT;
}
/**
* batadv_dat_hash_free - free the local DAT hash table
* @bat_priv: the bat priv with all the soft interface information
@ -657,6 +714,10 @@ int batadv_dat_init(struct batadv_priv *bat_priv)
batadv_dat_start_timer(bat_priv);
batadv_tvlv_handler_register(bat_priv, batadv_dat_tvlv_ogm_handler_v1,
NULL, BATADV_TVLV_DAT, 1,
BATADV_TVLV_HANDLER_OGM_CIFNOTFND);
batadv_dat_tvlv_container_update(bat_priv);
return 0;
}
@ -666,6 +727,9 @@ int batadv_dat_init(struct batadv_priv *bat_priv)
*/
void batadv_dat_free(struct batadv_priv *bat_priv)
{
batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_DAT, 1);
batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_DAT, 1);
cancel_delayed_work_sync(&bat_priv->dat.work);
batadv_dat_hash_free(bat_priv);

5
net/batman-adv/distributed-arp-table.h
View File

@ -29,6 +29,7 @@
#define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0)
void batadv_dat_status_update(struct net_device *net_dev);
bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
struct sk_buff *skb);
bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
@ -98,6 +99,10 @@ static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
#else
static inline void batadv_dat_status_update(struct net_device *net_dev)
{
}
static inline bool
batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
struct sk_buff *skb)

2
net/batman-adv/packet.h
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@ -121,9 +121,11 @@ enum batadv_bla_claimframe {
/**
* enum batadv_tvlv_type - tvlv type definitions
* @BATADV_TVLV_GW: gateway tvlv
* @BATADV_TVLV_DAT: distributed arp table tvlv
*/
enum batadv_tvlv_type {
BATADV_TVLV_GW = 0x01,
BATADV_TVLV_DAT = 0x02,
};
/* the destination hardware field in the ARP frame is used to

3
net/batman-adv/sysfs.c
View File

@ -425,7 +425,8 @@ BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
#endif
#ifdef CONFIG_BATMAN_ADV_DAT
BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR, NULL);
BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
batadv_dat_status_update);
#endif
BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
BATADV_ATTR_SIF_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);

10
net/batman-adv/types.h
View File

@ -100,6 +100,7 @@ struct batadv_hard_iface {
* @bcast_seqno_reset: time when the broadcast seqno window was reset
* @batman_seqno_reset: time when the batman seqno window was reset
* @flags: for now only VIS_SERVER flag
* @capabilities: announced capabilities of this originator
* @last_ttvn: last seen translation table version number
* @tt_crc: CRC of the translation table
* @tt_buff: last tt changeset this node received from the orig node
@ -147,6 +148,7 @@ struct batadv_orig_node {
unsigned long bcast_seqno_reset;
unsigned long batman_seqno_reset;
uint8_t flags;
uint8_t capabilities;
atomic_t last_ttvn;
uint16_t tt_crc;
unsigned char *tt_buff;
@ -183,6 +185,14 @@ struct batadv_orig_node {
#endif
};
/**
* enum batadv_orig_capabilities - orig node capabilities
* @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table enabled
*/
enum batadv_orig_capabilities {
BATADV_ORIG_CAPA_HAS_DAT = BIT(0),
};
/**
* struct batadv_gw_node - structure for orig nodes announcing gw capabilities
* @list: list node for batadv_priv_gw::list