Create network coding container to announce network coding capabilities (if enabled).
Signed-off-by: Marek Lindner lindner_marek@yahoo.de --- network-coding.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ network-coding.h | 6 ++++++ packet.h | 2 ++ sysfs.c | 4 +++- types.h | 2 ++ 5 files changed, 75 insertions(+), 1 deletion(-)
diff --git a/network-coding.c b/network-coding.c index 80fe2ea..7b95a7f 100644 --- a/network-coding.c +++ b/network-coding.c @@ -45,6 +45,59 @@ static void batadv_nc_start_timer(struct batadv_priv *bat_priv) }
/** + * 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_dat_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, + unsigned char *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_init - initialise coding hash table and start house keeping * @bat_priv: the bat priv with all the soft interface information */ @@ -78,6 +131,10 @@ int batadv_nc_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: @@ -654,6 +711,9 @@ static bool batadv_can_nc_with_orig(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, struct batadv_ogm_packet *ogm_packet) { + /* check if orig node is is network coding enabled */ + if (!(orig_node->capabilities & BATADV_ORIG_CAPA_HAS_NC)) + return false; if (orig_node->last_real_seqno != ntohl(ogm_packet->seqno)) return false; if (orig_node->last_ttl != ogm_packet->header.ttl + 1) @@ -1723,6 +1783,8 @@ free_nc_packet: void batadv_nc_free(struct batadv_priv *bat_priv) { batadv_recv_handler_unregister(BATADV_CODED); + 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); diff --git a/network-coding.h b/network-coding.h index 4fa6d0c..493d97e 100644 --- a/network-coding.h +++ b/network-coding.h @@ -22,6 +22,7 @@
#ifdef CONFIG_BATMAN_ADV_NC
+void batadv_nc_status_update(struct net_device *net_dev); int batadv_nc_init(struct batadv_priv *bat_priv); void batadv_nc_free(struct batadv_priv *bat_priv); void batadv_nc_update_nc_node(struct batadv_priv *bat_priv, @@ -47,6 +48,11 @@ 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) +{ + return; +} + static inline int batadv_nc_init(struct batadv_priv *bat_priv) { return 0; diff --git a/packet.h b/packet.h index fec0102..ce7ca53 100644 --- a/packet.h +++ b/packet.h @@ -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 diff --git a/sysfs.c b/sysfs.c index 02ea795..109a0d8 100644 --- a/sysfs.c +++ b/sysfs.c @@ -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" @@ -445,7 +446,8 @@ 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[] = { diff --git a/types.h b/types.h index ae47225..6919ca4 100644 --- a/types.h +++ b/types.h @@ -190,9 +190,11 @@ 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(1), + BATADV_ORIG_CAPA_HAS_NC = BIT(2), };
/**