batman-adv: OGMv2 - implement originators logic
Add the support for recognising new originators in the network and rebroadcast their OGMs. Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
This commit is contained in:
Antonio Quartulli
Antonio Quartulli
parent
0da0035942
commit
9323158ef9
@ -37,8 +37,8 @@
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#include <linux/workqueue.h>
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#include "bat_algo.h"
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#include "bat_v_ogm.h"
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#include "hard-interface.h"
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#include "hash.h"
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#include "originator.h"
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#include "packet.h"
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#include "routing.h"
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@ -195,45 +195,6 @@ void batadv_v_elp_primary_iface_set(struct batadv_hard_iface *primary_iface)
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rcu_read_unlock();
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}
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/**
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* batadv_v_ogm_orig_get - retrieve and possibly create an originator node
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* @bat_priv: the bat priv with all the soft interface information
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* @addr: the address of the originator
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*
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* Return: the orig_node corresponding to the specified address. If such object
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* does not exist it is allocated here. In case of allocation failure returns
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* NULL.
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*/
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static struct batadv_orig_node *
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batadv_v_ogm_orig_get(struct batadv_priv *bat_priv,
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const u8 *addr)
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{
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struct batadv_orig_node *orig_node;
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int hash_added;
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orig_node = batadv_orig_hash_find(bat_priv, addr);
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if (orig_node)
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return orig_node;
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orig_node = batadv_orig_node_new(bat_priv, addr);
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if (!orig_node)
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return NULL;
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hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
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batadv_choose_orig, orig_node,
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&orig_node->hash_entry);
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if (hash_added != 0) {
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/* orig_node->refcounter is initialised to 2 by
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* batadv_orig_node_new()
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*/
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batadv_orig_node_put(orig_node);
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batadv_orig_node_put(orig_node);
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orig_node = NULL;
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}
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return orig_node;
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}
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/**
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* batadv_v_elp_neigh_update - update an ELP neighbour node
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* @bat_priv: the bat priv with all the soft interface information
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@ -26,6 +26,7 @@
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#include <linux/if_ether.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/random.h>
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#include <linux/rculist.h>
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@ -38,11 +39,51 @@
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#include <linux/workqueue.h>
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#include "hard-interface.h"
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#include "hash.h"
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#include "originator.h"
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#include "packet.h"
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#include "routing.h"
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#include "send.h"
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#include "translation-table.h"
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/**
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* batadv_v_ogm_orig_get - retrieve and possibly create an originator node
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* @bat_priv: the bat priv with all the soft interface information
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* @addr: the address of the originator
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*
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* Return: the orig_node corresponding to the specified address. If such object
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* does not exist it is allocated here. In case of allocation failure returns
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* NULL.
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*/
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struct batadv_orig_node *batadv_v_ogm_orig_get(struct batadv_priv *bat_priv,
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const u8 *addr)
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{
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struct batadv_orig_node *orig_node;
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int hash_added;
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orig_node = batadv_orig_hash_find(bat_priv, addr);
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if (orig_node)
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return orig_node;
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orig_node = batadv_orig_node_new(bat_priv, addr);
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if (!orig_node)
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return NULL;
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hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
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batadv_choose_orig, orig_node,
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&orig_node->hash_entry);
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if (hash_added != 0) {
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/* orig_node->refcounter is initialised to 2 by
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* batadv_orig_node_new()
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*/
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batadv_orig_node_put(orig_node);
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batadv_orig_node_put(orig_node);
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orig_node = NULL;
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}
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return orig_node;
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}
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/**
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* batadv_v_ogm_start_timer - restart the OGM sending timer
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* @bat_priv: the bat priv with all the soft interface information
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@ -192,6 +233,500 @@ void batadv_v_ogm_primary_iface_set(struct batadv_hard_iface *primary_iface)
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ether_addr_copy(ogm_packet->orig, primary_iface->net_dev->dev_addr);
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}
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/**
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* batadv_v_ogm_orig_update - update the originator status based on the received
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* OGM
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* @bat_priv: the bat priv with all the soft interface information
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* @orig_node: the originator to update
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* @neigh_node: the neighbour the OGM has been received from (to update)
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* @ogm2: the received OGM
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* @if_outgoing: the interface where this OGM is going to be forwarded through
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*/
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static void
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batadv_v_ogm_orig_update(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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struct batadv_neigh_node *neigh_node,
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const struct batadv_ogm2_packet *ogm2,
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struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_neigh_ifinfo *router_ifinfo = NULL, *neigh_ifinfo = NULL;
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struct batadv_neigh_node *router = NULL;
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s32 neigh_seq_diff;
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u32 neigh_last_seqno;
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u32 router_last_seqno;
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u32 router_throughput, neigh_throughput;
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"Searching and updating originator entry of received packet\n");
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/* if this neighbor already is our next hop there is nothing
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* to change
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*/
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router = batadv_orig_router_get(orig_node, if_outgoing);
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if (router == neigh_node)
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goto out;
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/* don't consider neighbours with worse throughput.
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* also switch route if this seqno is BATADV_V_MAX_ORIGDIFF newer than
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* the last received seqno from our best next hop.
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*/
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if (router) {
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router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing);
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neigh_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
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/* if these are not allocated, something is wrong. */
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if (!router_ifinfo || !neigh_ifinfo)
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goto out;
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neigh_last_seqno = neigh_ifinfo->bat_v.last_seqno;
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router_last_seqno = router_ifinfo->bat_v.last_seqno;
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neigh_seq_diff = neigh_last_seqno - router_last_seqno;
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router_throughput = router_ifinfo->bat_v.throughput;
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neigh_throughput = neigh_ifinfo->bat_v.throughput;
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if ((neigh_seq_diff < BATADV_OGM_MAX_ORIGDIFF) &&
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(router_throughput >= neigh_throughput))
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goto out;
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}
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batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node);
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out:
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if (router_ifinfo)
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batadv_neigh_ifinfo_put(router_ifinfo);
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if (neigh_ifinfo)
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batadv_neigh_ifinfo_put(neigh_ifinfo);
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if (router)
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batadv_neigh_node_put(router);
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}
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/**
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* batadv_v_forward_penalty - apply a penalty to the throughput metric forwarded
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* with B.A.T.M.A.N. V OGMs
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* @bat_priv: the bat priv with all the soft interface information
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* @if_incoming: the interface where the OGM has been received
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* @if_outgoing: the interface where the OGM has to be forwarded to
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* @throughput: the current throughput
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*
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* Apply a penalty on the current throughput metric value based on the
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* characteristic of the interface where the OGM has been received. The return
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* value is computed as follows:
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* - throughput * 50% if the incoming and outgoing interface are the
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* same WiFi interface and the throughput is above
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* 1MBit/s
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* - throughput if the outgoing interface is the default
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* interface (i.e. this OGM is processed for the
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* internal table and not forwarded)
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* - throughput * hop penalty otherwise
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*
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* Return: the penalised throughput metric.
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*/
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static u32 batadv_v_forward_penalty(struct batadv_priv *bat_priv,
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struct batadv_hard_iface *if_incoming,
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struct batadv_hard_iface *if_outgoing,
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u32 throughput)
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{
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int hop_penalty = atomic_read(&bat_priv->hop_penalty);
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int hop_penalty_max = BATADV_TQ_MAX_VALUE;
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/* Don't apply hop penalty in default originator table. */
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if (if_outgoing == BATADV_IF_DEFAULT)
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return throughput;
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/* Forwarding on the same WiFi interface cuts the throughput in half
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* due to the store & forward characteristics of WIFI.
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* Very low throughput values are the exception.
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*/
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if ((throughput > 10) &&
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(if_incoming == if_outgoing) &&
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(batadv_is_wifi_netdev(if_incoming->net_dev)))
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return throughput / 2;
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/* hop penalty of 255 equals 100% */
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return throughput * (hop_penalty_max - hop_penalty) / hop_penalty_max;
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}
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/**
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* batadv_v_ogm_forward - forward an OGM to the given outgoing interface
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* @bat_priv: the bat priv with all the soft interface information
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* @ogm_received: previously received OGM to be forwarded
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* @throughput: throughput to announce, may vary per outgoing interface
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* @if_incoming: the interface on which this OGM was received on
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* @if_outgoing: the interface to which the OGM has to be forwarded to
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*
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* Forward an OGM to an interface after having altered the throughput metric and
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* the TTL value contained in it. The original OGM isn't modified.
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*/
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static void batadv_v_ogm_forward(struct batadv_priv *bat_priv,
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const struct batadv_ogm2_packet *ogm_received,
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u32 throughput,
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struct batadv_hard_iface *if_incoming,
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struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_ogm2_packet *ogm_forward;
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unsigned char *skb_buff;
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struct sk_buff *skb;
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size_t packet_len;
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u16 tvlv_len;
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if (ogm_received->ttl <= 1) {
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n");
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return;
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}
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tvlv_len = ntohs(ogm_received->tvlv_len);
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packet_len = BATADV_OGM2_HLEN + tvlv_len;
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skb = netdev_alloc_skb_ip_align(if_outgoing->net_dev,
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ETH_HLEN + packet_len);
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if (!skb)
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return;
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skb_reserve(skb, ETH_HLEN);
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skb_buff = skb_put(skb, packet_len);
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memcpy(skb_buff, ogm_received, packet_len);
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/* apply forward penalty */
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ogm_forward = (struct batadv_ogm2_packet *)skb_buff;
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ogm_forward->throughput = htonl(throughput);
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ogm_forward->ttl--;
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"Forwarding OGM2 packet on %s: throughput %u, ttl %u, received via %s\n",
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if_outgoing->net_dev->name, throughput, ogm_forward->ttl,
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if_incoming->net_dev->name);
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batadv_v_ogm_send_to_if(skb, if_outgoing);
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}
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/**
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* batadv_v_ogm_metric_update - update route metric based on OGM
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* @bat_priv: the bat priv with all the soft interface information
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* @ogm2: OGM2 structure
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* @orig_node: Originator structure for which the OGM has been received
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* @neigh_node: the neigh_node through with the OGM has been received
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* @if_incoming: the interface where this packet was received
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* @if_outgoing: the interface for which the packet should be considered
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*
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* Return:
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* 1 if the OGM is new,
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* 0 if it is not new but valid,
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* <0 on error (e.g. old OGM)
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*/
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static int batadv_v_ogm_metric_update(struct batadv_priv *bat_priv,
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const struct batadv_ogm2_packet *ogm2,
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struct batadv_orig_node *orig_node,
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struct batadv_neigh_node *neigh_node,
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struct batadv_hard_iface *if_incoming,
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struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_orig_ifinfo *orig_ifinfo = NULL;
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struct batadv_neigh_ifinfo *neigh_ifinfo = NULL;
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bool protection_started = false;
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int ret = -EINVAL;
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u32 path_throughput;
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s32 seq_diff;
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orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing);
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if (!orig_ifinfo)
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goto out;
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seq_diff = ntohl(ogm2->seqno) - orig_ifinfo->last_real_seqno;
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if (!hlist_empty(&orig_node->neigh_list) &&
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batadv_window_protected(bat_priv, seq_diff,
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BATADV_OGM_MAX_AGE,
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&orig_ifinfo->batman_seqno_reset,
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&protection_started)) {
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"Drop packet: packet within window protection time from %pM\n",
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ogm2->orig);
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"Last reset: %ld, %ld\n",
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orig_ifinfo->batman_seqno_reset, jiffies);
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goto out;
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}
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/* drop packets with old seqnos, however accept the first packet after
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* a host has been rebooted.
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*/
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if ((seq_diff < 0) && !protection_started)
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goto out;
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neigh_node->last_seen = jiffies;
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orig_node->last_seen = jiffies;
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orig_ifinfo->last_real_seqno = ntohl(ogm2->seqno);
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orig_ifinfo->last_ttl = ogm2->ttl;
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neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing);
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if (!neigh_ifinfo)
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goto out;
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path_throughput = batadv_v_forward_penalty(bat_priv, if_incoming,
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if_outgoing,
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ntohl(ogm2->throughput));
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neigh_ifinfo->bat_v.throughput = path_throughput;
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neigh_ifinfo->bat_v.last_seqno = ntohl(ogm2->seqno);
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neigh_ifinfo->last_ttl = ogm2->ttl;
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if (seq_diff > 0 || protection_started)
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ret = 1;
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else
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ret = 0;
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out:
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if (orig_ifinfo)
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batadv_orig_ifinfo_put(orig_ifinfo);
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if (neigh_ifinfo)
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batadv_neigh_ifinfo_put(neigh_ifinfo);
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return ret;
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}
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/**
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* batadv_v_ogm_route_update - update routes based on OGM
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* @bat_priv: the bat priv with all the soft interface information
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* @ethhdr: the Ethernet header of the OGM2
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* @ogm2: OGM2 structure
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* @orig_node: Originator structure for which the OGM has been received
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* @neigh_node: the neigh_node through with the OGM has been received
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* @if_incoming: the interface where this packet was received
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* @if_outgoing: the interface for which the packet should be considered
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*/
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static void batadv_v_ogm_route_update(struct batadv_priv *bat_priv,
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const struct ethhdr *ethhdr,
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const struct batadv_ogm2_packet *ogm2,
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struct batadv_orig_node *orig_node,
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struct batadv_neigh_node *neigh_node,
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struct batadv_hard_iface *if_incoming,
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struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_neigh_node *router = NULL;
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struct batadv_neigh_ifinfo *neigh_ifinfo = NULL;
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struct batadv_orig_node *orig_neigh_node = NULL;
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struct batadv_orig_ifinfo *orig_ifinfo = NULL;
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struct batadv_neigh_node *orig_neigh_router = NULL;
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neigh_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
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if (!neigh_ifinfo)
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goto out;
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orig_neigh_node = batadv_v_ogm_orig_get(bat_priv, ethhdr->h_source);
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if (!orig_neigh_node)
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goto out;
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orig_neigh_router = batadv_orig_router_get(orig_neigh_node,
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if_outgoing);
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/* drop packet if sender is not a direct neighbor and if we
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* don't route towards it
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*/
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router = batadv_orig_router_get(orig_node, if_outgoing);
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if (router && router->orig_node != orig_node && !orig_neigh_router) {
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batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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"Drop packet: OGM via unknown neighbor!\n");
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goto out;
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}
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if (router)
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batadv_neigh_node_put(router);
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/* Update routes, and check if the OGM is from the best next hop */
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batadv_v_ogm_orig_update(bat_priv, orig_node, neigh_node, ogm2,
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if_outgoing);
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orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing);
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if (!orig_ifinfo)
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goto out;
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/* don't forward the same seqno twice on one interface */
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if (orig_ifinfo->last_seqno_forwarded == ntohl(ogm2->seqno))
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goto out;
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/* acquire possibly updated router */
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router = batadv_orig_router_get(orig_node, if_outgoing);
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|
||||
/* strict rule: forward packets coming from the best next hop only */
|
||||
if (neigh_node != router)
|
||||
goto out;
|
||||
|
||||
/* only forward for specific interface, not for the default one. */
|
||||
if (if_outgoing != BATADV_IF_DEFAULT) {
|
||||
orig_ifinfo->last_seqno_forwarded = ntohl(ogm2->seqno);
|
||||
batadv_v_ogm_forward(bat_priv, ogm2,
|
||||
neigh_ifinfo->bat_v.throughput,
|
||||
if_incoming, if_outgoing);
|
||||
}
|
||||
|
||||
out:
|
||||
if (orig_ifinfo)
|
||||
batadv_orig_ifinfo_put(orig_ifinfo);
|
||||
if (router)
|
||||
batadv_neigh_node_put(router);
|
||||
if (orig_neigh_router)
|
||||
batadv_neigh_node_put(orig_neigh_router);
|
||||
if (orig_neigh_node)
|
||||
batadv_orig_node_put(orig_neigh_node);
|
||||
if (neigh_ifinfo)
|
||||
batadv_neigh_ifinfo_put(neigh_ifinfo);
|
||||
}
|
||||
|
||||
/**
|
||||
* batadv_v_ogm_process_per_outif - process a batman v OGM for an outgoing if
|
||||
* @bat_priv: the bat priv with all the soft interface information
|
||||
* @ethhdr: the Ethernet header of the OGM2
|
||||
* @ogm2: OGM2 structure
|
||||
* @orig_node: Originator structure for which the OGM has been received
|
||||
* @neigh_node: the neigh_node through with the OGM has been received
|
||||
* @if_incoming: the interface where this packet was received
|
||||
* @if_outgoing: the interface for which the packet should be considered
|
||||
*/
|
||||
static void
|
||||
batadv_v_ogm_process_per_outif(struct batadv_priv *bat_priv,
|
||||
const struct ethhdr *ethhdr,
|
||||
const struct batadv_ogm2_packet *ogm2,
|
||||
struct batadv_orig_node *orig_node,
|
||||
struct batadv_neigh_node *neigh_node,
|
||||
struct batadv_hard_iface *if_incoming,
|
||||
struct batadv_hard_iface *if_outgoing)
|
||||
{
|
||||
int seqno_age;
|
||||
|
||||
/* first, update the metric with according sanity checks */
|
||||
seqno_age = batadv_v_ogm_metric_update(bat_priv, ogm2, orig_node,
|
||||
neigh_node, if_incoming,
|
||||
if_outgoing);
|
||||
|
||||
/* outdated sequence numbers are to be discarded */
|
||||
if (seqno_age < 0)
|
||||
return;
|
||||
|
||||
/* only unknown & newer OGMs contain TVLVs we are interested in */
|
||||
if ((seqno_age > 0) && (if_outgoing == BATADV_IF_DEFAULT))
|
||||
batadv_tvlv_containers_process(bat_priv, true, orig_node,
|
||||
NULL, NULL,
|
||||
(unsigned char *)(ogm2 + 1),
|
||||
ntohs(ogm2->tvlv_len));
|
||||
|
||||
/* if the metric update went through, update routes if needed */
|
||||
batadv_v_ogm_route_update(bat_priv, ethhdr, ogm2, orig_node,
|
||||
neigh_node, if_incoming, if_outgoing);
|
||||
}
|
||||
|
||||
/**
|
||||
* batadv_v_ogm_aggr_packet - checks if there is another OGM aggregated
|
||||
* @buff_pos: current position in the skb
|
||||
* @packet_len: total length of the skb
|
||||
* @tvlv_len: tvlv length of the previously considered OGM
|
||||
*
|
||||
* Return: true if there is enough space for another OGM, false otherwise.
|
||||
*/
|
||||
static bool batadv_v_ogm_aggr_packet(int buff_pos, int packet_len,
|
||||
__be16 tvlv_len)
|
||||
{
|
||||
int next_buff_pos = 0;
|
||||
|
||||
next_buff_pos += buff_pos + BATADV_OGM2_HLEN;
|
||||
next_buff_pos += ntohs(tvlv_len);
|
||||
|
||||
return (next_buff_pos <= packet_len) &&
|
||||
(next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES);
|
||||
}
|
||||
|
||||
/**
|
||||
* batadv_v_ogm_process - process an incoming batman v OGM
|
||||
* @skb: the skb containing the OGM
|
||||
* @ogm_offset: offset to the OGM which should be processed (for aggregates)
|
||||
* @if_incoming: the interface where this packet was receved
|
||||
*/
|
||||
static void batadv_v_ogm_process(const struct sk_buff *skb, int ogm_offset,
|
||||
struct batadv_hard_iface *if_incoming)
|
||||
{
|
||||
struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
|
||||
struct ethhdr *ethhdr;
|
||||
struct batadv_orig_node *orig_node = NULL;
|
||||
struct batadv_hardif_neigh_node *hardif_neigh = NULL;
|
||||
struct batadv_neigh_node *neigh_node = NULL;
|
||||
struct batadv_hard_iface *hard_iface;
|
||||
struct batadv_ogm2_packet *ogm_packet;
|
||||
u32 ogm_throughput, link_throughput, path_throughput;
|
||||
|
||||
ethhdr = eth_hdr(skb);
|
||||
ogm_packet = (struct batadv_ogm2_packet *)(skb->data + ogm_offset);
|
||||
|
||||
ogm_throughput = ntohl(ogm_packet->throughput);
|
||||
|
||||
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
|
||||
"Received OGM2 packet via NB: %pM, IF: %s [%pM] (from OG: %pM, seqno %u, troughput %u, TTL %u, V %u, tvlv_len %u)\n",
|
||||
ethhdr->h_source, if_incoming->net_dev->name,
|
||||
if_incoming->net_dev->dev_addr, ogm_packet->orig,
|
||||
ntohl(ogm_packet->seqno), ogm_throughput, ogm_packet->ttl,
|
||||
ogm_packet->version, ntohs(ogm_packet->tvlv_len));
|
||||
|
||||
/* If the troughput metric is 0, immediately drop the packet. No need to
|
||||
* create orig_node / neigh_node for an unusable route.
|
||||
*/
|
||||
if (ogm_throughput == 0) {
|
||||
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
|
||||
"Drop packet: originator packet with troughput metric of 0\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* require ELP packets be to received from this neighbor first */
|
||||
hardif_neigh = batadv_hardif_neigh_get(if_incoming, ethhdr->h_source);
|
||||
if (!hardif_neigh) {
|
||||
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
|
||||
"Drop packet: OGM via unknown neighbor!\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
orig_node = batadv_v_ogm_orig_get(bat_priv, ogm_packet->orig);
|
||||
if (!orig_node)
|
||||
return;
|
||||
|
||||
neigh_node = batadv_neigh_node_new(orig_node, if_incoming,
|
||||
ethhdr->h_source);
|
||||
if (!neigh_node)
|
||||
goto out;
|
||||
|
||||
/* Update the received throughput metric to match the link
|
||||
* characteristic:
|
||||
* - If this OGM traveled one hop so far (emitted by single hop
|
||||
* neighbor) the path throughput metric equals the link throughput.
|
||||
* - For OGMs traversing more than hop the path throughput metric is
|
||||
* the smaller of the path throughput and the link throughput.
|
||||
*/
|
||||
link_throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);
|
||||
path_throughput = min_t(u32, link_throughput, ogm_throughput);
|
||||
ogm_packet->throughput = htonl(path_throughput);
|
||||
|
||||
batadv_v_ogm_process_per_outif(bat_priv, ethhdr, ogm_packet, orig_node,
|
||||
neigh_node, if_incoming,
|
||||
BATADV_IF_DEFAULT);
|
||||
|
||||
rcu_read_lock();
|
||||
list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
|
||||
if (hard_iface->if_status != BATADV_IF_ACTIVE)
|
||||
continue;
|
||||
|
||||
if (hard_iface->soft_iface != bat_priv->soft_iface)
|
||||
continue;
|
||||
|
||||
batadv_v_ogm_process_per_outif(bat_priv, ethhdr, ogm_packet,
|
||||
orig_node, neigh_node,
|
||||
if_incoming, hard_iface);
|
||||
}
|
||||
rcu_read_unlock();
|
||||
out:
|
||||
if (orig_node)
|
||||
batadv_orig_node_put(orig_node);
|
||||
if (neigh_node)
|
||||
batadv_neigh_node_put(neigh_node);
|
||||
if (hardif_neigh)
|
||||
batadv_hardif_neigh_put(hardif_neigh);
|
||||
}
|
||||
|
||||
/**
|
||||
* batadv_v_ogm_packet_recv - OGM2 receiving handler
|
||||
* @skb: the received OGM
|
||||
@ -206,6 +741,9 @@ int batadv_v_ogm_packet_recv(struct sk_buff *skb,
|
||||
struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
|
||||
struct batadv_ogm2_packet *ogm_packet;
|
||||
struct ethhdr *ethhdr = eth_hdr(skb);
|
||||
int ogm_offset;
|
||||
u8 *packet_pos;
|
||||
int ret = NET_RX_DROP;
|
||||
|
||||
/* did we receive a OGM2 packet on an interface that does not have
|
||||
* B.A.T.M.A.N. V enabled ?
|
||||
@ -228,8 +766,24 @@ int batadv_v_ogm_packet_recv(struct sk_buff *skb,
|
||||
batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES,
|
||||
skb->len + ETH_HLEN);
|
||||
|
||||
ogm_offset = 0;
|
||||
ogm_packet = (struct batadv_ogm2_packet *)skb->data;
|
||||
|
||||
while (batadv_v_ogm_aggr_packet(ogm_offset, skb_headlen(skb),
|
||||
ogm_packet->tvlv_len)) {
|
||||
batadv_v_ogm_process(skb, ogm_offset, if_incoming);
|
||||
|
||||
ogm_offset += BATADV_OGM2_HLEN;
|
||||
ogm_offset += ntohs(ogm_packet->tvlv_len);
|
||||
|
||||
packet_pos = skb->data + ogm_offset;
|
||||
ogm_packet = (struct batadv_ogm2_packet *)packet_pos;
|
||||
}
|
||||
|
||||
ret = NET_RX_SUCCESS;
|
||||
consume_skb(skb);
|
||||
return NET_RX_SUCCESS;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
|
||||
@ -18,6 +18,8 @@
|
||||
#ifndef _BATMAN_ADV_BATADV_V_OGM_H_
|
||||
#define _BATMAN_ADV_BATADV_V_OGM_H_
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
struct batadv_hard_iface;
|
||||
struct batadv_priv;
|
||||
struct sk_buff;
|
||||
@ -25,6 +27,8 @@ struct sk_buff;
|
||||
int batadv_v_ogm_init(struct batadv_priv *bat_priv);
|
||||
void batadv_v_ogm_free(struct batadv_priv *bat_priv);
|
||||
int batadv_v_ogm_iface_enable(struct batadv_hard_iface *hard_iface);
|
||||
struct batadv_orig_node *batadv_v_ogm_orig_get(struct batadv_priv *bat_priv,
|
||||
const u8 *addr);
|
||||
void batadv_v_ogm_primary_iface_set(struct batadv_hard_iface *primary_iface);
|
||||
int batadv_v_ogm_packet_recv(struct sk_buff *skb,
|
||||
struct batadv_hard_iface *if_incoming);
|
||||
|
||||
@ -63,6 +63,8 @@
|
||||
|
||||
/* B.A.T.M.A.N. V */
|
||||
#define BATADV_ELP_MAX_AGE 64
|
||||
#define BATADV_OGM_MAX_ORIGDIFF 5
|
||||
#define BATADV_OGM_MAX_AGE 64
|
||||
|
||||
/* number of OGMs sent with the last tt diff */
|
||||
#define BATADV_TT_OGM_APPEND_MAX 3
|
||||
|
||||
@ -149,6 +149,7 @@ struct batadv_hard_iface {
|
||||
* @router: router that should be used to reach this originator
|
||||
* @last_real_seqno: last and best known sequence number
|
||||
* @last_ttl: ttl of last received packet
|
||||
* @last_seqno_forwarded: seqno of the OGM which was forwarded last
|
||||
* @batman_seqno_reset: time when the batman seqno window was reset
|
||||
* @refcount: number of contexts the object is used
|
||||
* @rcu: struct used for freeing in an RCU-safe manner
|
||||
@ -159,6 +160,7 @@ struct batadv_orig_ifinfo {
|
||||
struct batadv_neigh_node __rcu *router; /* rcu protected pointer */
|
||||
u32 last_real_seqno;
|
||||
u8 last_ttl;
|
||||
u32 last_seqno_forwarded;
|
||||
unsigned long batman_seqno_reset;
|
||||
struct kref refcount;
|
||||
struct rcu_head rcu;
|
||||
@ -448,9 +450,11 @@ struct batadv_neigh_ifinfo_bat_iv {
|
||||
* struct batadv_neigh_ifinfo_bat_v - neighbor information per outgoing
|
||||
* interface for B.A.T.M.A.N. V
|
||||
* @throughput: last throughput metric received from originator via this neigh
|
||||
* @last_seqno: last sequence number known for this neighbor
|
||||
*/
|
||||
struct batadv_neigh_ifinfo_bat_v {
|
||||
u32 throughput;
|
||||
u32 last_seqno;
|
||||
};
|
||||
|
||||
/**
|
||||
|
||||
Loading…
Reference in New Issue
Block a user