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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 2016-01-16 16:40:13 +08:00 committed by Antonio Quartulli
parent 0da0035942
commit 9323158ef9
5 changed files with 566 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
net/batman-adv/bat_v_elp.c
View File

@ -37,8 +37,8 @@
#include <linux/workqueue.h>
#include "bat_algo.h"
#include "bat_v_ogm.h"
#include "hard-interface.h"
#include "hash.h"
#include "originator.h"
#include "packet.h"
#include "routing.h"
@ -195,45 +195,6 @@ void batadv_v_elp_primary_iface_set(struct batadv_hard_iface *primary_iface)
rcu_read_unlock();
}
/**
* batadv_v_ogm_orig_get - retrieve and possibly create an originator node
* @bat_priv: the bat priv with all the soft interface information
* @addr: the address of the originator
*
* Return: the orig_node corresponding to the specified address. If such object
* does not exist it is allocated here. In case of allocation failure returns
* NULL.
*/
static struct batadv_orig_node *
batadv_v_ogm_orig_get(struct batadv_priv *bat_priv,
const u8 *addr)
{
struct batadv_orig_node *orig_node;
int hash_added;
orig_node = batadv_orig_hash_find(bat_priv, addr);
if (orig_node)
return orig_node;
orig_node = batadv_orig_node_new(bat_priv, addr);
if (!orig_node)
return NULL;
hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
batadv_choose_orig, orig_node,
&orig_node->hash_entry);
if (hash_added != 0) {
/* orig_node->refcounter is initialised to 2 by
* batadv_orig_node_new()
*/
batadv_orig_node_put(orig_node);
batadv_orig_node_put(orig_node);
orig_node = NULL;
}
return orig_node;
}
/**
* batadv_v_elp_neigh_update - update an ELP neighbour node
* @bat_priv: the bat priv with all the soft interface information

556
net/batman-adv/bat_v_ogm.c
View File

@ -26,6 +26,7 @@
#include <linux/if_ether.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/random.h>
#include <linux/rculist.h>
@ -38,11 +39,51 @@
#include <linux/workqueue.h>
#include "hard-interface.h"
#include "hash.h"
#include "originator.h"
#include "packet.h"
#include "routing.h"
#include "send.h"
#include "translation-table.h"
/**
* batadv_v_ogm_orig_get - retrieve and possibly create an originator node
* @bat_priv: the bat priv with all the soft interface information
* @addr: the address of the originator
*
* Return: the orig_node corresponding to the specified address. If such object
* does not exist it is allocated here. In case of allocation failure returns
* NULL.
*/
struct batadv_orig_node *batadv_v_ogm_orig_get(struct batadv_priv *bat_priv,
const u8 *addr)
{
struct batadv_orig_node *orig_node;
int hash_added;
orig_node = batadv_orig_hash_find(bat_priv, addr);
if (orig_node)
return orig_node;
orig_node = batadv_orig_node_new(bat_priv, addr);
if (!orig_node)
return NULL;
hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
batadv_choose_orig, orig_node,
&orig_node->hash_entry);
if (hash_added != 0) {
/* orig_node->refcounter is initialised to 2 by
* batadv_orig_node_new()
*/
batadv_orig_node_put(orig_node);
batadv_orig_node_put(orig_node);
orig_node = NULL;
}
return orig_node;
}
/**
* batadv_v_ogm_start_timer - restart the OGM sending timer
* @bat_priv: the bat priv with all the soft interface information
@ -192,6 +233,500 @@ void batadv_v_ogm_primary_iface_set(struct batadv_hard_iface *primary_iface)
ether_addr_copy(ogm_packet->orig, primary_iface->net_dev->dev_addr);
}
/**
* batadv_v_ogm_orig_update - update the originator status based on the received
* OGM
* @bat_priv: the bat priv with all the soft interface information
* @orig_node: the originator to update
* @neigh_node: the neighbour the OGM has been received from (to update)
* @ogm2: the received OGM
* @if_outgoing: the interface where this OGM is going to be forwarded through
*/
static void
batadv_v_ogm_orig_update(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
struct batadv_neigh_node *neigh_node,
const struct batadv_ogm2_packet *ogm2,
struct batadv_hard_iface *if_outgoing)
{
struct batadv_neigh_ifinfo *router_ifinfo = NULL, *neigh_ifinfo = NULL;
struct batadv_neigh_node *router = NULL;
s32 neigh_seq_diff;
u32 neigh_last_seqno;
u32 router_last_seqno;
u32 router_throughput, neigh_throughput;
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Searching and updating originator entry of received packet\n");
/* if this neighbor already is our next hop there is nothing
* to change
*/
router = batadv_orig_router_get(orig_node, if_outgoing);
if (router == neigh_node)
goto out;
/* don't consider neighbours with worse throughput.
* also switch route if this seqno is BATADV_V_MAX_ORIGDIFF newer than
* the last received seqno from our best next hop.
*/
if (router) {
router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing);
neigh_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
/* if these are not allocated, something is wrong. */
if (!router_ifinfo || !neigh_ifinfo)
goto out;
neigh_last_seqno = neigh_ifinfo->bat_v.last_seqno;
router_last_seqno = router_ifinfo->bat_v.last_seqno;
neigh_seq_diff = neigh_last_seqno - router_last_seqno;
router_throughput = router_ifinfo->bat_v.throughput;
neigh_throughput = neigh_ifinfo->bat_v.throughput;
if ((neigh_seq_diff < BATADV_OGM_MAX_ORIGDIFF) &&
(router_throughput >= neigh_throughput))
goto out;
}
batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node);
out:
if (router_ifinfo)
batadv_neigh_ifinfo_put(router_ifinfo);
if (neigh_ifinfo)
batadv_neigh_ifinfo_put(neigh_ifinfo);
if (router)
batadv_neigh_node_put(router);
}
/**
* batadv_v_forward_penalty - apply a penalty to the throughput metric forwarded
* with B.A.T.M.A.N. V OGMs
* @bat_priv: the bat priv with all the soft interface information
* @if_incoming: the interface where the OGM has been received
* @if_outgoing: the interface where the OGM has to be forwarded to
* @throughput: the current throughput
*
* Apply a penalty on the current throughput metric value based on the
* characteristic of the interface where the OGM has been received. The return
* value is computed as follows:
* - throughput * 50% if the incoming and outgoing interface are the
* same WiFi interface and the throughput is above
* 1MBit/s
* - throughput if the outgoing interface is the default
* interface (i.e. this OGM is processed for the
* internal table and not forwarded)
* - throughput * hop penalty otherwise
*
* Return: the penalised throughput metric.
*/
static u32 batadv_v_forward_penalty(struct batadv_priv *bat_priv,
struct batadv_hard_iface *if_incoming,
struct batadv_hard_iface *if_outgoing,
u32 throughput)
{
int hop_penalty = atomic_read(&bat_priv->hop_penalty);
int hop_penalty_max = BATADV_TQ_MAX_VALUE;
/* Don't apply hop penalty in default originator table. */
if (if_outgoing == BATADV_IF_DEFAULT)
return throughput;
/* Forwarding on the same WiFi interface cuts the throughput in half
* due to the store & forward characteristics of WIFI.
* Very low throughput values are the exception.
*/
if ((throughput > 10) &&
(if_incoming == if_outgoing) &&
(batadv_is_wifi_netdev(if_incoming->net_dev)))
return throughput / 2;
/* hop penalty of 255 equals 100% */
return throughput * (hop_penalty_max - hop_penalty) / hop_penalty_max;
}
/**
* batadv_v_ogm_forward - forward an OGM to the given outgoing interface
* @bat_priv: the bat priv with all the soft interface information
* @ogm_received: previously received OGM to be forwarded
* @throughput: throughput to announce, may vary per outgoing interface
* @if_incoming: the interface on which this OGM was received on
* @if_outgoing: the interface to which the OGM has to be forwarded to
*
* Forward an OGM to an interface after having altered the throughput metric and
* the TTL value contained in it. The original OGM isn't modified.
*/
static void batadv_v_ogm_forward(struct batadv_priv *bat_priv,
const struct batadv_ogm2_packet *ogm_received,
u32 throughput,
struct batadv_hard_iface *if_incoming,
struct batadv_hard_iface *if_outgoing)
{
struct batadv_ogm2_packet *ogm_forward;
unsigned char *skb_buff;
struct sk_buff *skb;
size_t packet_len;
u16 tvlv_len;
if (ogm_received->ttl <= 1) {
batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n");
return;
}
tvlv_len = ntohs(ogm_received->tvlv_len);
packet_len = BATADV_OGM2_HLEN + tvlv_len;
skb = netdev_alloc_skb_ip_align(if_outgoing->net_dev,
ETH_HLEN + packet_len);
if (!skb)
return;
skb_reserve(skb, ETH_HLEN);
skb_buff = skb_put(skb, packet_len);
memcpy(skb_buff, ogm_received, packet_len);
/* apply forward penalty */
ogm_forward = (struct batadv_ogm2_packet *)skb_buff;
ogm_forward->throughput = htonl(throughput);
ogm_forward->ttl--;
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Forwarding OGM2 packet on %s: throughput %u, ttl %u, received via %s\n",
if_outgoing->net_dev->name, throughput, ogm_forward->ttl,
if_incoming->net_dev->name);
batadv_v_ogm_send_to_if(skb, if_outgoing);
}
/**
* batadv_v_ogm_metric_update - update route metric based on OGM
* @bat_priv: the bat priv with all the soft interface information
* @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
*
* Return:
* 1 if the OGM is new,
* 0 if it is not new but valid,
* <0 on error (e.g. old OGM)
*/
static int batadv_v_ogm_metric_update(struct batadv_priv *bat_priv,
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)
{
struct batadv_orig_ifinfo *orig_ifinfo = NULL;
struct batadv_neigh_ifinfo *neigh_ifinfo = NULL;
bool protection_started = false;
int ret = -EINVAL;
u32 path_throughput;
s32 seq_diff;
orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing);
if (!orig_ifinfo)
goto out;
seq_diff = ntohl(ogm2->seqno) - orig_ifinfo->last_real_seqno;
if (!hlist_empty(&orig_node->neigh_list) &&
batadv_window_protected(bat_priv, seq_diff,
BATADV_OGM_MAX_AGE,
&orig_ifinfo->batman_seqno_reset,
&protection_started)) {
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Drop packet: packet within window protection time from %pM\n",
ogm2->orig);
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Last reset: %ld, %ld\n",
orig_ifinfo->batman_seqno_reset, jiffies);
goto out;
}
/* drop packets with old seqnos, however accept the first packet after
* a host has been rebooted.
*/
if ((seq_diff < 0) && !protection_started)
goto out;
neigh_node->last_seen = jiffies;
orig_node->last_seen = jiffies;
orig_ifinfo->last_real_seqno = ntohl(ogm2->seqno);
orig_ifinfo->last_ttl = ogm2->ttl;
neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing);
if (!neigh_ifinfo)
goto out;
path_throughput = batadv_v_forward_penalty(bat_priv, if_incoming,
if_outgoing,
ntohl(ogm2->throughput));
neigh_ifinfo->bat_v.throughput = path_throughput;
neigh_ifinfo->bat_v.last_seqno = ntohl(ogm2->seqno);
neigh_ifinfo->last_ttl = ogm2->ttl;
if (seq_diff > 0 || protection_started)
ret = 1;
else
ret = 0;
out:
if (orig_ifinfo)
batadv_orig_ifinfo_put(orig_ifinfo);
if (neigh_ifinfo)
batadv_neigh_ifinfo_put(neigh_ifinfo);
return ret;
}
/**
* batadv_v_ogm_route_update - update routes based on OGM
* @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_route_update(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)
{
struct batadv_neigh_node *router = NULL;
struct batadv_neigh_ifinfo *neigh_ifinfo = NULL;
struct batadv_orig_node *orig_neigh_node = NULL;
struct batadv_orig_ifinfo *orig_ifinfo = NULL;
struct batadv_neigh_node *orig_neigh_router = NULL;
neigh_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
if (!neigh_ifinfo)
goto out;
orig_neigh_node = batadv_v_ogm_orig_get(bat_priv, ethhdr->h_source);
if (!orig_neigh_node)
goto out;
orig_neigh_router = batadv_orig_router_get(orig_neigh_node,
if_outgoing);
/* drop packet if sender is not a direct neighbor and if we
* don't route towards it
*/
router = batadv_orig_router_get(orig_node, if_outgoing);
if (router && router->orig_node != orig_node && !orig_neigh_router) {
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Drop packet: OGM via unknown neighbor!\n");
goto out;
}
if (router)
batadv_neigh_node_put(router);
/* Update routes, and check if the OGM is from the best next hop */
batadv_v_ogm_orig_update(bat_priv, orig_node, neigh_node, ogm2,
if_outgoing);
orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing);
if (!orig_ifinfo)
goto out;
/* don't forward the same seqno twice on one interface */
if (orig_ifinfo->last_seqno_forwarded == ntohl(ogm2->seqno))
goto out;
/* acquire possibly updated router */
router = batadv_orig_router_get(orig_node, if_outgoing);
/* 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;
}
/**

4
net/batman-adv/bat_v_ogm.h
View File

@ -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);

2
net/batman-adv/main.h
View File

@ -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

4
net/batman-adv/types.h
View File

@ -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;
};
/**