Skip to content

L
linux
Commit 0c070900 authored by David S. Miller's avatar David S. Miller
Browse files
Options

Merge branch 'batman-adv/next' of git://git.open-mesh.org/linux-merge

parents f26cd41a 320f422f
Show whitespace changes
Inline Side-by-side
Showing with 1281 additions and 1275 deletions
Documentation/networking/batman-adv.txt
View file @ 0c070900
[state: 17-04-2011] [state: 21-08-2011]
BATMAN-ADV BATMAN-ADV
---------- ----------
...@@ -68,9 +68,9 @@ All mesh wide settings can be found in batman's own interface ...@@ -68,9 +68,9 @@ All mesh wide settings can be found in batman's own interface
folder: folder:
# ls /sys/class/net/bat0/mesh/ # ls /sys/class/net/bat0/mesh/
# aggregated_ogms gw_bandwidth hop_penalty # aggregated_ogms fragmentation gw_sel_class vis_mode
# ap_isolation gw_bandwidth hop_penalty
# bonding gw_mode orig_interval # bonding gw_mode orig_interval
# fragmentation gw_sel_class vis_mode
There is a special folder for debugging information: There is a special folder for debugging information:
......
net/batman-adv/Makefile
View file @ 0c070900
...@@ -19,8 +19,8 @@ ...@@ -19,8 +19,8 @@
# #
obj-$(CONFIG_BATMAN_ADV) += batman-adv.o obj-$(CONFIG_BATMAN_ADV) += batman-adv.o
batman-adv-y += aggregation.o
batman-adv-y += bat_debugfs.o batman-adv-y += bat_debugfs.o
batman-adv-y += bat_iv_ogm.o
batman-adv-y += bat_sysfs.o batman-adv-y += bat_sysfs.o
batman-adv-y += bitarray.o batman-adv-y += bitarray.o
batman-adv-y += gateway_client.o batman-adv-y += gateway_client.o
......
net/batman-adv/aggregation.c deleted 100644 → 0
View file @ f26cd41a
/*
* Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
*
* Marek Lindner, Simon Wunderlich
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*
*/
#include "main.h"
#include "translation-table.h"
#include "aggregation.h"
#include "send.h"
#include "routing.h"
#include "hard-interface.h"
/* return true if new_packet can be aggregated with forw_packet */
static bool can_aggregate_with(const struct batman_packet *new_batman_packet,
struct bat_priv *bat_priv,
int packet_len,
unsigned long send_time,
bool directlink,
const struct hard_iface *if_incoming,
const struct forw_packet *forw_packet)
{
struct batman_packet *batman_packet =
(struct batman_packet *)forw_packet->skb->data;
int aggregated_bytes = forw_packet->packet_len + packet_len;
struct hard_iface *primary_if = NULL;
bool res = false;
/**
* we can aggregate the current packet to this aggregated packet
* if:
*
* - the send time is within our MAX_AGGREGATION_MS time
* - the resulting packet wont be bigger than
* MAX_AGGREGATION_BYTES
*/
if (time_before(send_time, forw_packet->send_time) &&
time_after_eq(send_time + msecs_to_jiffies(MAX_AGGREGATION_MS),
forw_packet->send_time) &&
(aggregated_bytes <= MAX_AGGREGATION_BYTES)) {
/**
* check aggregation compatibility
* -> direct link packets are broadcasted on
* their interface only
* -> aggregate packet if the current packet is
* a "global" packet as well as the base
* packet
*/
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
/* packets without direct link flag and high TTL
* are flooded through the net */
if ((!directlink) &&
(!(batman_packet->flags & DIRECTLINK)) &&
(batman_packet->ttl != 1) &&
/* own packets originating non-primary
* interfaces leave only that interface */
((!forw_packet->own) ||
(forw_packet->if_incoming == primary_if))) {
res = true;
goto out;
}
/* if the incoming packet is sent via this one
* interface only - we still can aggregate */
if ((directlink) &&
(new_batman_packet->ttl == 1) &&
(forw_packet->if_incoming == if_incoming) &&
/* packets from direct neighbors or
* own secondary interface packets
* (= secondary interface packets in general) */
(batman_packet->flags & DIRECTLINK ||
(forw_packet->own &&
forw_packet->if_incoming != primary_if))) {
res = true;
goto out;
}
}
out:
if (primary_if)
hardif_free_ref(primary_if);
return res;
}
/* create a new aggregated packet and add this packet to it */
static void new_aggregated_packet(const unsigned char *packet_buff,
int packet_len, unsigned long send_time,
bool direct_link,
struct hard_iface *if_incoming,
int own_packet)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct forw_packet *forw_packet_aggr;
unsigned char *skb_buff;
if (!atomic_inc_not_zero(&if_incoming->refcount))
return;
/* own packet should always be scheduled */
if (!own_packet) {
if (!atomic_dec_not_zero(&bat_priv->batman_queue_left)) {
bat_dbg(DBG_BATMAN, bat_priv,
"batman packet queue full\n");
goto out;
}
}
forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC);
if (!forw_packet_aggr) {
if (!own_packet)
atomic_inc(&bat_priv->batman_queue_left);
goto out;
}
if ((atomic_read(&bat_priv->aggregated_ogms)) &&
(packet_len < MAX_AGGREGATION_BYTES))
forw_packet_aggr->skb = dev_alloc_skb(MAX_AGGREGATION_BYTES +
sizeof(struct ethhdr));
else
forw_packet_aggr->skb = dev_alloc_skb(packet_len +
sizeof(struct ethhdr));
if (!forw_packet_aggr->skb) {
if (!own_packet)
atomic_inc(&bat_priv->batman_queue_left);
kfree(forw_packet_aggr);
goto out;
}
skb_reserve(forw_packet_aggr->skb, sizeof(struct ethhdr));
INIT_HLIST_NODE(&forw_packet_aggr->list);
skb_buff = skb_put(forw_packet_aggr->skb, packet_len);
forw_packet_aggr->packet_len = packet_len;
memcpy(skb_buff, packet_buff, packet_len);
forw_packet_aggr->own = own_packet;
forw_packet_aggr->if_incoming = if_incoming;
forw_packet_aggr->num_packets = 0;
forw_packet_aggr->direct_link_flags = NO_FLAGS;
forw_packet_aggr->send_time = send_time;
/* save packet direct link flag status */
if (direct_link)
forw_packet_aggr->direct_link_flags |= 1;
/* add new packet to packet list */
spin_lock_bh(&bat_priv->forw_bat_list_lock);
hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list);
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
/* start timer for this packet */
INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work,
send_outstanding_bat_packet);
queue_delayed_work(bat_event_workqueue,
&forw_packet_aggr->delayed_work,
send_time - jiffies);
return;
out:
hardif_free_ref(if_incoming);
}
/* aggregate a new packet into the existing aggregation */
static void aggregate(struct forw_packet *forw_packet_aggr,
const unsigned char *packet_buff, int packet_len,
bool direct_link)
{
unsigned char *skb_buff;
skb_buff = skb_put(forw_packet_aggr->skb, packet_len);
memcpy(skb_buff, packet_buff, packet_len);
forw_packet_aggr->packet_len += packet_len;
forw_packet_aggr->num_packets++;
/* save packet direct link flag status */
if (direct_link)
forw_packet_aggr->direct_link_flags |=
(1 << forw_packet_aggr->num_packets);
}
void add_bat_packet_to_list(struct bat_priv *bat_priv,
unsigned char *packet_buff, int packet_len,
struct hard_iface *if_incoming, int own_packet,
unsigned long send_time)
{
/**
* _aggr -> pointer to the packet we want to aggregate with
* _pos -> pointer to the position in the queue
*/
struct forw_packet *forw_packet_aggr = NULL, *forw_packet_pos = NULL;
struct hlist_node *tmp_node;
struct batman_packet *batman_packet =
(struct batman_packet *)packet_buff;
bool direct_link = batman_packet->flags & DIRECTLINK ? 1 : 0;
/* find position for the packet in the forward queue */
spin_lock_bh(&bat_priv->forw_bat_list_lock);
/* own packets are not to be aggregated */
if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) {
hlist_for_each_entry(forw_packet_pos, tmp_node,
&bat_priv->forw_bat_list, list) {
if (can_aggregate_with(batman_packet,
bat_priv,
packet_len,
send_time,
direct_link,
if_incoming,
forw_packet_pos)) {
forw_packet_aggr = forw_packet_pos;
break;
}
}
}
/* nothing to aggregate with - either aggregation disabled or no
* suitable aggregation packet found */
if (!forw_packet_aggr) {
/* the following section can run without the lock */
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
/**
* if we could not aggregate this packet with one of the others
* we hold it back for a while, so that it might be aggregated
* later on
*/
if ((!own_packet) &&
(atomic_read(&bat_priv->aggregated_ogms)))
send_time += msecs_to_jiffies(MAX_AGGREGATION_MS);
new_aggregated_packet(packet_buff, packet_len,
send_time, direct_link,
if_incoming, own_packet);
} else {
aggregate(forw_packet_aggr,
packet_buff, packet_len,
direct_link);
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
}
}
/* unpack the aggregated packets and process them one by one */
void receive_aggr_bat_packet(const struct ethhdr *ethhdr,
unsigned char *packet_buff, int packet_len,
struct hard_iface *if_incoming)
{
struct batman_packet *batman_packet;
int buff_pos = 0;
unsigned char *tt_buff;
batman_packet = (struct batman_packet *)packet_buff;
do {
/* network to host order for our 32bit seqno and the
orig_interval */
batman_packet->seqno = ntohl(batman_packet->seqno);
batman_packet->tt_crc = ntohs(batman_packet->tt_crc);
tt_buff = packet_buff + buff_pos + BAT_PACKET_LEN;
receive_bat_packet(ethhdr, batman_packet, tt_buff, if_incoming);
buff_pos += BAT_PACKET_LEN +
tt_len(batman_packet->tt_num_changes);
batman_packet = (struct batman_packet *)
(packet_buff + buff_pos);
} while (aggregated_packet(buff_pos, packet_len,
batman_packet->tt_num_changes));
}
net/batman-adv/bat_iv_ogm.c 0 → 100644
View file @ 0c070900
/*
* Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
*
* Marek Lindner, Simon Wunderlich
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*
*/
#include "main.h"
#include "bat_ogm.h"
#include "translation-table.h"
#include "ring_buffer.h"
#include "originator.h"
#include "routing.h"
#include "gateway_common.h"
#include "gateway_client.h"
#include "hard-interface.h"
#include "send.h"
void bat_ogm_init(struct hard_iface *hard_iface)
{
struct batman_ogm_packet *batman_ogm_packet;
hard_iface->packet_len = BATMAN_OGM_LEN;
hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC);
batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
batman_ogm_packet->packet_type = BAT_OGM;
batman_ogm_packet->version = COMPAT_VERSION;
batman_ogm_packet->flags = NO_FLAGS;
batman_ogm_packet->ttl = 2;
batman_ogm_packet->tq = TQ_MAX_VALUE;
batman_ogm_packet->tt_num_changes = 0;
batman_ogm_packet->ttvn = 0;
}
void bat_ogm_init_primary(struct hard_iface *hard_iface)
{
struct batman_ogm_packet *batman_ogm_packet;
batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
batman_ogm_packet->flags = PRIMARIES_FIRST_HOP;
batman_ogm_packet->ttl = TTL;
}
void bat_ogm_update_mac(struct hard_iface *hard_iface)
{
struct batman_ogm_packet *batman_ogm_packet;
batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
memcpy(batman_ogm_packet->orig,
hard_iface->net_dev->dev_addr, ETH_ALEN);
memcpy(batman_ogm_packet->prev_sender,
hard_iface->net_dev->dev_addr, ETH_ALEN);
}
/* when do we schedule our own ogm to be sent */
static unsigned long bat_ogm_emit_send_time(const struct bat_priv *bat_priv)
{
return jiffies + msecs_to_jiffies(
atomic_read(&bat_priv->orig_interval) -
JITTER + (random32() % 2*JITTER));
}
/* when do we schedule a ogm packet to be sent */
static unsigned long bat_ogm_fwd_send_time(void)
{
return jiffies + msecs_to_jiffies(random32() % (JITTER/2));
}
/* apply hop penalty for a normal link */
static uint8_t hop_penalty(uint8_t tq, const struct bat_priv *bat_priv)
{
int hop_penalty = atomic_read(&bat_priv->hop_penalty);
return (tq * (TQ_MAX_VALUE - hop_penalty)) / (TQ_MAX_VALUE);
}
/* is there another aggregated packet here? */
static int bat_ogm_aggr_packet(int buff_pos, int packet_len,
int tt_num_changes)
{
int next_buff_pos = buff_pos + BATMAN_OGM_LEN + tt_len(tt_num_changes);
return (next_buff_pos <= packet_len) &&
(next_buff_pos <= MAX_AGGREGATION_BYTES);
}
/* send a batman ogm to a given interface */
static void bat_ogm_send_to_if(struct forw_packet *forw_packet,
struct hard_iface *hard_iface)
{
struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
char *fwd_str;
uint8_t packet_num;
int16_t buff_pos;
struct batman_ogm_packet *batman_ogm_packet;
struct sk_buff *skb;
if (hard_iface->if_status != IF_ACTIVE)
return;
packet_num = 0;
buff_pos = 0;
batman_ogm_packet = (struct batman_ogm_packet *)forw_packet->skb->data;
/* adjust all flags and log packets */
while (bat_ogm_aggr_packet(buff_pos, forw_packet->packet_len,
batman_ogm_packet->tt_num_changes)) {
/* we might have aggregated direct link packets with an
* ordinary base packet */
if ((forw_packet->direct_link_flags & (1 << packet_num)) &&
(forw_packet->if_incoming == hard_iface))
batman_ogm_packet->flags |= DIRECTLINK;
else
batman_ogm_packet->flags &= ~DIRECTLINK;
fwd_str = (packet_num > 0 ? "Forwarding" : (forw_packet->own ?
"Sending own" :
"Forwarding"));
bat_dbg(DBG_BATMAN, bat_priv,
"%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d,"
" IDF %s, ttvn %d) on interface %s [%pM]\n",
fwd_str, (packet_num > 0 ? "aggregated " : ""),
batman_ogm_packet->orig,
ntohl(batman_ogm_packet->seqno),
batman_ogm_packet->tq, batman_ogm_packet->ttl,
(batman_ogm_packet->flags & DIRECTLINK ?
"on" : "off"),
batman_ogm_packet->ttvn, hard_iface->net_dev->name,
hard_iface->net_dev->dev_addr);
buff_pos += BATMAN_OGM_LEN +
tt_len(batman_ogm_packet->tt_num_changes);
packet_num++;
batman_ogm_packet = (struct batman_ogm_packet *)
(forw_packet->skb->data + buff_pos);
}
/* create clone because function is called more than once */
skb = skb_clone(forw_packet->skb, GFP_ATOMIC);
if (skb)
send_skb_packet(skb, hard_iface, broadcast_addr);
}
/* send a batman ogm packet */
void bat_ogm_emit(struct forw_packet *forw_packet)
{
struct hard_iface *hard_iface;
struct net_device *soft_iface;
struct bat_priv *bat_priv;
struct hard_iface *primary_if = NULL;
struct batman_ogm_packet *batman_ogm_packet;
unsigned char directlink;
batman_ogm_packet = (struct batman_ogm_packet *)
(forw_packet->skb->data);
directlink = (batman_ogm_packet->flags & DIRECTLINK ? 1 : 0);
if (!forw_packet->if_incoming) {
pr_err("Error - can't forward packet: incoming iface not "
"specified\n");
goto out;
}
soft_iface = forw_packet->if_incoming->soft_iface;
bat_priv = netdev_priv(soft_iface);
if (forw_packet->if_incoming->if_status != IF_ACTIVE)
goto out;
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
/* multihomed peer assumed */
/* non-primary OGMs are only broadcasted on their interface */
if ((directlink && (batman_ogm_packet->ttl == 1)) ||
(forw_packet->own && (forw_packet->if_incoming != primary_if))) {
/* FIXME: what about aggregated packets ? */
bat_dbg(DBG_BATMAN, bat_priv,
"%s packet (originator %pM, seqno %d, TTL %d) "
"on interface %s [%pM]\n",
(forw_packet->own ? "Sending own" : "Forwarding"),
batman_ogm_packet->orig,
ntohl(batman_ogm_packet->seqno),
batman_ogm_packet->ttl,
forw_packet->if_incoming->net_dev->name,
forw_packet->if_incoming->net_dev->dev_addr);
/* skb is only used once and than forw_packet is free'd */
send_skb_packet(forw_packet->skb, forw_packet->if_incoming,
broadcast_addr);
forw_packet->skb = NULL;
goto out;
}
/* broadcast on every interface */
rcu_read_lock();
list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
if (hard_iface->soft_iface != soft_iface)
continue;
bat_ogm_send_to_if(forw_packet, hard_iface);
}
rcu_read_unlock();
out:
if (primary_if)
hardif_free_ref(primary_if);
}
/* return true if new_packet can be aggregated with forw_packet */
static bool bat_ogm_can_aggregate(const struct batman_ogm_packet
*new_batman_ogm_packet,
struct bat_priv *bat_priv,
int packet_len, unsigned long send_time,
bool directlink,
const struct hard_iface *if_incoming,
const struct forw_packet *forw_packet)
{
struct batman_ogm_packet *batman_ogm_packet;
int aggregated_bytes = forw_packet->packet_len + packet_len;
struct hard_iface *primary_if = NULL;
bool res = false;
batman_ogm_packet = (struct batman_ogm_packet *)forw_packet->skb->data;
/**
* we can aggregate the current packet to this aggregated packet
* if:
*
* - the send time is within our MAX_AGGREGATION_MS time
* - the resulting packet wont be bigger than
* MAX_AGGREGATION_BYTES
*/
if (time_before(send_time, forw_packet->send_time) &&
time_after_eq(send_time + msecs_to_jiffies(MAX_AGGREGATION_MS),
forw_packet->send_time) &&
(aggregated_bytes <= MAX_AGGREGATION_BYTES)) {
/**
* check aggregation compatibility
* -> direct link packets are broadcasted on
* their interface only
* -> aggregate packet if the current packet is
* a "global" packet as well as the base
* packet
*/
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
/* packets without direct link flag and high TTL
* are flooded through the net */
if ((!directlink) &&
(!(batman_ogm_packet->flags & DIRECTLINK)) &&
(batman_ogm_packet->ttl != 1) &&
/* own packets originating non-primary
* interfaces leave only that interface */
((!forw_packet->own) ||
(forw_packet->if_incoming == primary_if))) {
res = true;
goto out;
}
/* if the incoming packet is sent via this one
* interface only - we still can aggregate */
if ((directlink) &&
(new_batman_ogm_packet->ttl == 1) &&
(forw_packet->if_incoming == if_incoming) &&
/* packets from direct neighbors or
* own secondary interface packets
* (= secondary interface packets in general) */
(batman_ogm_packet->flags & DIRECTLINK ||
(forw_packet->own &&
forw_packet->if_incoming != primary_if))) {
res = true;
goto out;
}
}
out:
if (primary_if)
hardif_free_ref(primary_if);
return res;
}
/* create a new aggregated packet and add this packet to it */
static void bat_ogm_aggregate_new(const unsigned char *packet_buff,
int packet_len, unsigned long send_time,
bool direct_link,
struct hard_iface *if_incoming,
int own_packet)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct forw_packet *forw_packet_aggr;
unsigned char *skb_buff;
if (!atomic_inc_not_zero(&if_incoming->refcount))
return;
/* own packet should always be scheduled */
if (!own_packet) {
if (!atomic_dec_not_zero(&bat_priv->batman_queue_left)) {
bat_dbg(DBG_BATMAN, bat_priv,
"batman packet queue full\n");
goto out;
}
}
forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC);
if (!forw_packet_aggr) {
if (!own_packet)
atomic_inc(&bat_priv->batman_queue_left);
goto out;
}
if ((atomic_read(&bat_priv->aggregated_ogms)) &&
(packet_len < MAX_AGGREGATION_BYTES))
forw_packet_aggr->skb = dev_alloc_skb(MAX_AGGREGATION_BYTES +
sizeof(struct ethhdr));
else
forw_packet_aggr->skb = dev_alloc_skb(packet_len +
sizeof(struct ethhdr));
if (!forw_packet_aggr->skb) {
if (!own_packet)
atomic_inc(&bat_priv->batman_queue_left);
kfree(forw_packet_aggr);
goto out;
}
skb_reserve(forw_packet_aggr->skb, sizeof(struct ethhdr));
INIT_HLIST_NODE(&forw_packet_aggr->list);
skb_buff = skb_put(forw_packet_aggr->skb, packet_len);
forw_packet_aggr->packet_len = packet_len;
memcpy(skb_buff, packet_buff, packet_len);
forw_packet_aggr->own = own_packet;
forw_packet_aggr->if_incoming = if_incoming;
forw_packet_aggr->num_packets = 0;
forw_packet_aggr->direct_link_flags = NO_FLAGS;
forw_packet_aggr->send_time = send_time;
/* save packet direct link flag status */
if (direct_link)
forw_packet_aggr->direct_link_flags |= 1;
/* add new packet to packet list */
spin_lock_bh(&bat_priv->forw_bat_list_lock);
hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list);
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
/* start timer for this packet */
INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work,
send_outstanding_bat_ogm_packet);
queue_delayed_work(bat_event_workqueue,
&forw_packet_aggr->delayed_work,
send_time - jiffies);
return;
out:
hardif_free_ref(if_incoming);
}
/* aggregate a new packet into the existing ogm packet */
static void bat_ogm_aggregate(struct forw_packet *forw_packet_aggr,
const unsigned char *packet_buff,
int packet_len, bool direct_link)
{
unsigned char *skb_buff;
skb_buff = skb_put(forw_packet_aggr->skb, packet_len);
memcpy(skb_buff, packet_buff, packet_len);
forw_packet_aggr->packet_len += packet_len;
forw_packet_aggr->num_packets++;
/* save packet direct link flag status */
if (direct_link)
forw_packet_aggr->direct_link_flags |=
(1 << forw_packet_aggr->num_packets);
}
static void bat_ogm_queue_add(struct bat_priv *bat_priv,
unsigned char *packet_buff,
int packet_len, struct hard_iface *if_incoming,
int own_packet, unsigned long send_time)
{
/**
* _aggr -> pointer to the packet we want to aggregate with
* _pos -> pointer to the position in the queue
*/
struct forw_packet *forw_packet_aggr = NULL, *forw_packet_pos = NULL;
struct hlist_node *tmp_node;
struct batman_ogm_packet *batman_ogm_packet;
bool direct_link;
batman_ogm_packet = (struct batman_ogm_packet *)packet_buff;
direct_link = batman_ogm_packet->flags & DIRECTLINK ? 1 : 0;
/* find position for the packet in the forward queue */
spin_lock_bh(&bat_priv->forw_bat_list_lock);
/* own packets are not to be aggregated */
if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) {
hlist_for_each_entry(forw_packet_pos, tmp_node,
&bat_priv->forw_bat_list, list) {
if (bat_ogm_can_aggregate(batman_ogm_packet,
bat_priv, packet_len,
send_time, direct_link,
if_incoming,
forw_packet_pos)) {
forw_packet_aggr = forw_packet_pos;
break;
}
}
}
/* nothing to aggregate with - either aggregation disabled or no
* suitable aggregation packet found */
if (!forw_packet_aggr) {
/* the following section can run without the lock */
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
/**
* if we could not aggregate this packet with one of the others
* we hold it back for a while, so that it might be aggregated
* later on
*/
if ((!own_packet) &&
(atomic_read(&bat_priv->aggregated_ogms)))
send_time += msecs_to_jiffies(MAX_AGGREGATION_MS);
bat_ogm_aggregate_new(packet_buff, packet_len,
send_time, direct_link,
if_incoming, own_packet);
} else {
bat_ogm_aggregate(forw_packet_aggr, packet_buff, packet_len,
direct_link);
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
}
}
static void bat_ogm_forward(struct orig_node *orig_node,
const struct ethhdr *ethhdr,
struct batman_ogm_packet *batman_ogm_packet,
int directlink, struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *router;
uint8_t in_tq, in_ttl, tq_avg = 0;
uint8_t tt_num_changes;
if (batman_ogm_packet->ttl <= 1) {
bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n");
return;
}
router = orig_node_get_router(orig_node);
in_tq = batman_ogm_packet->tq;
in_ttl = batman_ogm_packet->ttl;
tt_num_changes = batman_ogm_packet->tt_num_changes;
batman_ogm_packet->ttl--;
memcpy(batman_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN);
/* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast
* of our best tq value */
if (router && router->tq_avg != 0) {
/* rebroadcast ogm of best ranking neighbor as is */
if (!compare_eth(router->addr, ethhdr->h_source)) {
batman_ogm_packet->tq = router->tq_avg;
if (router->last_ttl)
batman_ogm_packet->ttl = router->last_ttl - 1;
}
tq_avg = router->tq_avg;
}
if (router)
neigh_node_free_ref(router);
/* apply hop penalty */
batman_ogm_packet->tq = hop_penalty(batman_ogm_packet->tq, bat_priv);
bat_dbg(DBG_BATMAN, bat_priv,
"Forwarding packet: tq_orig: %i, tq_avg: %i, "
"tq_forw: %i, ttl_orig: %i, ttl_forw: %i\n",
in_tq, tq_avg, batman_ogm_packet->tq, in_ttl - 1,
batman_ogm_packet->ttl);
batman_ogm_packet->seqno = htonl(batman_ogm_packet->seqno);
batman_ogm_packet->tt_crc = htons(batman_ogm_packet->tt_crc);
/* switch of primaries first hop flag when forwarding */
batman_ogm_packet->flags &= ~PRIMARIES_FIRST_HOP;
if (directlink)
batman_ogm_packet->flags |= DIRECTLINK;
else
batman_ogm_packet->flags &= ~DIRECTLINK;
bat_ogm_queue_add(bat_priv, (unsigned char *)batman_ogm_packet,
BATMAN_OGM_LEN + tt_len(tt_num_changes),
if_incoming, 0, bat_ogm_fwd_send_time());
}
void bat_ogm_schedule(struct hard_iface *hard_iface, int tt_num_changes)
{
struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
struct batman_ogm_packet *batman_ogm_packet;
struct hard_iface *primary_if;
int vis_server;
vis_server = atomic_read(&bat_priv->vis_mode);
primary_if = primary_if_get_selected(bat_priv);
batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
/* change sequence number to network order */
batman_ogm_packet->seqno =
htonl((uint32_t)atomic_read(&hard_iface->seqno));
batman_ogm_packet->ttvn = atomic_read(&bat_priv->ttvn);
batman_ogm_packet->tt_crc = htons((uint16_t)
atomic_read(&bat_priv->tt_crc));
if (tt_num_changes >= 0)
batman_ogm_packet->tt_num_changes = tt_num_changes;
if (vis_server == VIS_TYPE_SERVER_SYNC)
batman_ogm_packet->flags |= VIS_SERVER;
else
batman_ogm_packet->flags &= ~VIS_SERVER;
if ((hard_iface == primary_if) &&
(atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER))
batman_ogm_packet->gw_flags =
(uint8_t)atomic_read(&bat_priv->gw_bandwidth);
else
batman_ogm_packet->gw_flags = NO_FLAGS;
atomic_inc(&hard_iface->seqno);
slide_own_bcast_window(hard_iface);
bat_ogm_queue_add(bat_priv, hard_iface->packet_buff,
hard_iface->packet_len, hard_iface, 1,
bat_ogm_emit_send_time(bat_priv));
if (primary_if)
hardif_free_ref(primary_if);
}
static void bat_ogm_orig_update(struct bat_priv *bat_priv,
struct orig_node *orig_node,
const struct ethhdr *ethhdr,
const struct batman_ogm_packet
*batman_ogm_packet,
struct hard_iface *if_incoming,
const unsigned char *tt_buff, int is_duplicate)
{
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
struct neigh_node *router = NULL;
struct orig_node *orig_node_tmp;
struct hlist_node *node;
uint8_t bcast_own_sum_orig, bcast_own_sum_neigh;
bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
"Searching and updating originator entry of received packet\n");
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
(tmp_neigh_node->if_incoming == if_incoming) &&
atomic_inc_not_zero(&tmp_neigh_node->refcount)) {
if (neigh_node)
neigh_node_free_ref(neigh_node);
neigh_node = tmp_neigh_node;
continue;
}
if (is_duplicate)
continue;
spin_lock_bh(&tmp_neigh_node->tq_lock);
ring_buffer_set(tmp_neigh_node->tq_recv,
&tmp_neigh_node->tq_index, 0);
tmp_neigh_node->tq_avg =
ring_buffer_avg(tmp_neigh_node->tq_recv);
spin_unlock_bh(&tmp_neigh_node->tq_lock);
}
if (!neigh_node) {
struct orig_node *orig_tmp;
orig_tmp = get_orig_node(bat_priv, ethhdr->h_source);
if (!orig_tmp)
goto unlock;
neigh_node = create_neighbor(orig_node, orig_tmp,
ethhdr->h_source, if_incoming);
orig_node_free_ref(orig_tmp);
if (!neigh_node)
goto unlock;
} else
bat_dbg(DBG_BATMAN, bat_priv,
"Updating existing last-hop neighbor of originator\n");
rcu_read_unlock();
orig_node->flags = batman_ogm_packet->flags;
neigh_node->last_valid = jiffies;
spin_lock_bh(&neigh_node->tq_lock);
ring_buffer_set(neigh_node->tq_recv,
&neigh_node->tq_index,
batman_ogm_packet->tq);
neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv);
spin_unlock_bh(&neigh_node->tq_lock);
if (!is_duplicate) {
orig_node->last_ttl = batman_ogm_packet->ttl;
neigh_node->last_ttl = batman_ogm_packet->ttl;
}
bonding_candidate_add(orig_node, neigh_node);
/* if this neighbor already is our next hop there is nothing
* to change */
router = orig_node_get_router(orig_node);
if (router == neigh_node)
goto update_tt;
/* if this neighbor does not offer a better TQ we won't consider it */
if (router && (router->tq_avg > neigh_node->tq_avg))
goto update_tt;
/* if the TQ is the same and the link not more symmetric we
* won't consider it either */
if (router && (neigh_node->tq_avg == router->tq_avg)) {
orig_node_tmp = router->orig_node;
spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
bcast_own_sum_orig =
orig_node_tmp->bcast_own_sum[if_incoming->if_num];
spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
orig_node_tmp = neigh_node->orig_node;
spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
bcast_own_sum_neigh =
orig_node_tmp->bcast_own_sum[if_incoming->if_num];
spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
if (bcast_own_sum_orig >= bcast_own_sum_neigh)
goto update_tt;
}
update_route(bat_priv, orig_node, neigh_node);
update_tt:
/* I have to check for transtable changes only if the OGM has been
* sent through a primary interface */
if (((batman_ogm_packet->orig != ethhdr->h_source) &&
(batman_ogm_packet->ttl > 2)) ||
(batman_ogm_packet->flags & PRIMARIES_FIRST_HOP))
tt_update_orig(bat_priv, orig_node, tt_buff,
batman_ogm_packet->tt_num_changes,
batman_ogm_packet->ttvn,
batman_ogm_packet->tt_crc);
if (orig_node->gw_flags != batman_ogm_packet->gw_flags)
gw_node_update(bat_priv, orig_node,
batman_ogm_packet->gw_flags);
orig_node->gw_flags = batman_ogm_packet->gw_flags;
/* restart gateway selection if fast or late switching was enabled */
if ((orig_node->gw_flags) &&
(atomic_read(&bat_priv->gw_mode) == GW_MODE_CLIENT) &&
(atomic_read(&bat_priv->gw_sel_class) > 2))
gw_check_election(bat_priv, orig_node);
goto out;
unlock:
rcu_read_unlock();
out:
if (neigh_node)
neigh_node_free_ref(neigh_node);
if (router)
neigh_node_free_ref(router);
}
static int bat_ogm_calc_tq(struct orig_node *orig_node,
struct orig_node *orig_neigh_node,
struct batman_ogm_packet *batman_ogm_packet,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *neigh_node = NULL, *tmp_neigh_node;
struct hlist_node *node;
uint8_t total_count;
uint8_t orig_eq_count, neigh_rq_count, tq_own;
int tq_asym_penalty, ret = 0;
/* find corresponding one hop neighbor */
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_neigh_node->neigh_list, list) {
if (!compare_eth(tmp_neigh_node->addr, orig_neigh_node->orig))
continue;
if (tmp_neigh_node->if_incoming != if_incoming)
continue;
if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
continue;
neigh_node = tmp_neigh_node;
break;
}
rcu_read_unlock();
if (!neigh_node)
neigh_node = create_neighbor(orig_neigh_node,
orig_neigh_node,
orig_neigh_node->orig,
if_incoming);
if (!neigh_node)
goto out;
/* if orig_node is direct neighbor update neigh_node last_valid */
if (orig_node == orig_neigh_node)
neigh_node->last_valid = jiffies;
orig_node->last_valid = jiffies;
/* find packet count of corresponding one hop neighbor */
spin_lock_bh(&orig_node->ogm_cnt_lock);
orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num];
neigh_rq_count = neigh_node->real_packet_count;
spin_unlock_bh(&orig_node->ogm_cnt_lock);
/* pay attention to not get a value bigger than 100 % */
total_count = (orig_eq_count > neigh_rq_count ?
neigh_rq_count : orig_eq_count);
/* if we have too few packets (too less data) we set tq_own to zero */
/* if we receive too few packets it is not considered bidirectional */
if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) ||
(neigh_rq_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
tq_own = 0;
else
/* neigh_node->real_packet_count is never zero as we
* only purge old information when getting new
* information */
tq_own = (TQ_MAX_VALUE * total_count) / neigh_rq_count;
/*
* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
* affect the nearly-symmetric links only a little, but
* punishes asymmetric links more. This will give a value
* between 0 and TQ_MAX_VALUE
*/
tq_asym_penalty = TQ_MAX_VALUE - (TQ_MAX_VALUE *
(TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
(TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
(TQ_LOCAL_WINDOW_SIZE - neigh_rq_count)) /
(TQ_LOCAL_WINDOW_SIZE *
TQ_LOCAL_WINDOW_SIZE *
TQ_LOCAL_WINDOW_SIZE);
batman_ogm_packet->tq = ((batman_ogm_packet->tq * tq_own
* tq_asym_penalty) /
(TQ_MAX_VALUE * TQ_MAX_VALUE));
bat_dbg(DBG_BATMAN, bat_priv,
"bidirectional: "
"orig = %-15pM neigh = %-15pM => own_bcast = %2i, "
"real recv = %2i, local tq: %3i, asym_penalty: %3i, "
"total tq: %3i\n",
orig_node->orig, orig_neigh_node->orig, total_count,
neigh_rq_count, tq_own, tq_asym_penalty, batman_ogm_packet->tq);
/* if link has the minimum required transmission quality
* consider it bidirectional */
if (batman_ogm_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT)
ret = 1;
out:
if (neigh_node)
neigh_node_free_ref(neigh_node);
return ret;
}
/* processes a batman packet for all interfaces, adjusts the sequence number and
* finds out whether it is a duplicate.
* returns:
* 1 the packet is a duplicate
* 0 the packet has not yet been received
* -1 the packet is old and has been received while the seqno window
* was protected. Caller should drop it.
*/
static int bat_ogm_update_seqnos(const struct ethhdr *ethhdr,
const struct batman_ogm_packet
*batman_ogm_packet,
const struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct orig_node *orig_node;
struct neigh_node *tmp_neigh_node;
struct hlist_node *node;
int is_duplicate = 0;
int32_t seq_diff;
int need_update = 0;
int set_mark, ret = -1;
orig_node = get_orig_node(bat_priv, batman_ogm_packet->orig);
if (!orig_node)
return 0;
spin_lock_bh(&orig_node->ogm_cnt_lock);
seq_diff = batman_ogm_packet->seqno - orig_node->last_real_seqno;
/* signalize caller that the packet is to be dropped. */
if (window_protected(bat_priv, seq_diff,
&orig_node->batman_seqno_reset))
goto out;
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
is_duplicate |= get_bit_status(tmp_neigh_node->real_bits,
orig_node->last_real_seqno,
batman_ogm_packet->seqno);
if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
(tmp_neigh_node->if_incoming == if_incoming))
set_mark = 1;
else
set_mark = 0;
/* if the window moved, set the update flag. */
need_update |= bit_get_packet(bat_priv,
tmp_neigh_node->real_bits,
seq_diff, set_mark);
tmp_neigh_node->real_packet_count =
bit_packet_count(tmp_neigh_node->real_bits);
}
rcu_read_unlock();
if (need_update) {
bat_dbg(DBG_BATMAN, bat_priv,
"updating last_seqno: old %d, new %d\n",
orig_node->last_real_seqno, batman_ogm_packet->seqno);
orig_node->last_real_seqno = batman_ogm_packet->seqno;
}
ret = is_duplicate;
out:
spin_unlock_bh(&orig_node->ogm_cnt_lock);
orig_node_free_ref(orig_node);
return ret;
}
static void bat_ogm_process(const struct ethhdr *ethhdr,
struct batman_ogm_packet *batman_ogm_packet,
const unsigned char *tt_buff,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct hard_iface *hard_iface;
struct orig_node *orig_neigh_node, *orig_node;
struct neigh_node *router = NULL, *router_router = NULL;
struct neigh_node *orig_neigh_router = NULL;
int has_directlink_flag;
int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
int is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
int is_duplicate;
uint32_t if_incoming_seqno;
/* Silently drop when the batman packet is actually not a
* correct packet.
*
* This might happen if a packet is padded (e.g. Ethernet has a
* minimum frame length of 64 byte) and the aggregation interprets
* it as an additional length.
*
* TODO: A more sane solution would be to have a bit in the
* batman_ogm_packet to detect whether the packet is the last
* packet in an aggregation. Here we expect that the padding
* is always zero (or not 0x01)
*/
if (batman_ogm_packet->packet_type != BAT_OGM)
return;
/* could be changed by schedule_own_packet() */
if_incoming_seqno = atomic_read(&if_incoming->seqno);
has_directlink_flag = (batman_ogm_packet->flags & DIRECTLINK ? 1 : 0);
is_single_hop_neigh = (compare_eth(ethhdr->h_source,
batman_ogm_packet->orig) ? 1 : 0);
bat_dbg(DBG_BATMAN, bat_priv,
"Received BATMAN packet via NB: %pM, IF: %s [%pM] "
"(from OG: %pM, via prev OG: %pM, seqno %d, ttvn %u, "
"crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
ethhdr->h_source, if_incoming->net_dev->name,
if_incoming->net_dev->dev_addr, batman_ogm_packet->orig,
batman_ogm_packet->prev_sender, batman_ogm_packet->seqno,
batman_ogm_packet->ttvn, batman_ogm_packet->tt_crc,
batman_ogm_packet->tt_num_changes, batman_ogm_packet->tq,
batman_ogm_packet->ttl, batman_ogm_packet->version,
has_directlink_flag);
rcu_read_lock();
list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
if (hard_iface->if_status != IF_ACTIVE)
continue;
if (hard_iface->soft_iface != if_incoming->soft_iface)
continue;
if (compare_eth(ethhdr->h_source,
hard_iface->net_dev->dev_addr))
is_my_addr = 1;
if (compare_eth(batman_ogm_packet->orig,
hard_iface->net_dev->dev_addr))
is_my_orig = 1;
if (compare_eth(batman_ogm_packet->prev_sender,
hard_iface->net_dev->dev_addr))
is_my_oldorig = 1;
if (is_broadcast_ether_addr(ethhdr->h_source))
is_broadcast = 1;
}
rcu_read_unlock();
if (batman_ogm_packet->version != COMPAT_VERSION) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: incompatible batman version (%i)\n",
batman_ogm_packet->version);
return;
}
if (is_my_addr) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: received my own broadcast (sender: %pM"
")\n",
ethhdr->h_source);
return;
}
if (is_broadcast) {
bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
"ignoring all packets with broadcast source addr (sender: %pM"
")\n", ethhdr->h_source);
return;
}
if (is_my_orig) {
unsigned long *word;
int offset;
orig_neigh_node = get_orig_node(bat_priv, ethhdr->h_source);
if (!orig_neigh_node)
return;
/* neighbor has to indicate direct link and it has to
* come via the corresponding interface */
/* save packet seqno for bidirectional check */
if (has_directlink_flag &&
compare_eth(if_incoming->net_dev->dev_addr,
batman_ogm_packet->orig)) {
offset = if_incoming->if_num * NUM_WORDS;
spin_lock_bh(&orig_neigh_node->ogm_cnt_lock);
word = &(orig_neigh_node->bcast_own[offset]);
bit_mark(word,
if_incoming_seqno -
batman_ogm_packet->seqno - 2);
orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
bit_packet_count(word);
spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock);
}
bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
"originator packet from myself (via neighbor)\n");
orig_node_free_ref(orig_neigh_node);
return;
}
if (is_my_oldorig) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: ignoring all rebroadcast echos (sender: "
"%pM)\n", ethhdr->h_source);
return;
}
orig_node = get_orig_node(bat_priv, batman_ogm_packet->orig);
if (!orig_node)
return;
is_duplicate = bat_ogm_update_seqnos(ethhdr, batman_ogm_packet,
if_incoming);
if (is_duplicate == -1) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: packet within seqno protection time "
"(sender: %pM)\n", ethhdr->h_source);
goto out;
}
if (batman_ogm_packet->tq == 0) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: originator packet with tq equal 0\n");
goto out;
}
router = orig_node_get_router(orig_node);
if (router)
router_router = orig_node_get_router(router->orig_node);
/* avoid temporary routing loops */
if (router && router_router &&
(compare_eth(router->addr, batman_ogm_packet->prev_sender)) &&
!(compare_eth(batman_ogm_packet->orig,
batman_ogm_packet->prev_sender)) &&
(compare_eth(router->addr, router_router->addr))) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: ignoring all rebroadcast packets that "
"may make me loop (sender: %pM)\n", ethhdr->h_source);
goto out;
}
/* if sender is a direct neighbor the sender mac equals
* originator mac */
orig_neigh_node = (is_single_hop_neigh ?
orig_node :
get_orig_node(bat_priv, ethhdr->h_source));
if (!orig_neigh_node)
goto out;
orig_neigh_router = orig_node_get_router(orig_neigh_node);
/* drop packet if sender is not a direct neighbor and if we
* don't route towards it */
if (!is_single_hop_neigh && (!orig_neigh_router)) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: OGM via unknown neighbor!\n");
goto out_neigh;
}
is_bidirectional = bat_ogm_calc_tq(orig_node, orig_neigh_node,
batman_ogm_packet, if_incoming);
bonding_save_primary(orig_node, orig_neigh_node, batman_ogm_packet);
/* update ranking if it is not a duplicate or has the same
* seqno and similar ttl as the non-duplicate */
if (is_bidirectional &&
(!is_duplicate ||
((orig_node->last_real_seqno == batman_ogm_packet->seqno) &&
(orig_node->last_ttl - 3 <= batman_ogm_packet->ttl))))
bat_ogm_orig_update(bat_priv, orig_node, ethhdr,
batman_ogm_packet, if_incoming,
tt_buff, is_duplicate);
/* is single hop (direct) neighbor */
if (is_single_hop_neigh) {
/* mark direct link on incoming interface */
bat_ogm_forward(orig_node, ethhdr, batman_ogm_packet,
1, if_incoming);
bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
"rebroadcast neighbor packet with direct link flag\n");
goto out_neigh;
}
/* multihop originator */
if (!is_bidirectional) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: not received via bidirectional link\n");
goto out_neigh;
}
if (is_duplicate) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: duplicate packet received\n");
goto out_neigh;
}
bat_dbg(DBG_BATMAN, bat_priv,
"Forwarding packet: rebroadcast originator packet\n");
bat_ogm_forward(orig_node, ethhdr, batman_ogm_packet, 0, if_incoming);
out_neigh:
if ((orig_neigh_node) && (!is_single_hop_neigh))
orig_node_free_ref(orig_neigh_node);
out:
if (router)
neigh_node_free_ref(router);
if (router_router)
neigh_node_free_ref(router_router);
if (orig_neigh_router)
neigh_node_free_ref(orig_neigh_router);
orig_node_free_ref(orig_node);
}
void bat_ogm_receive(const struct ethhdr *ethhdr, unsigned char *packet_buff,
int packet_len, struct hard_iface *if_incoming)
{
struct batman_ogm_packet *batman_ogm_packet;
int buff_pos = 0;
unsigned char *tt_buff;
batman_ogm_packet = (struct batman_ogm_packet *)packet_buff;
/* unpack the aggregated packets and process them one by one */
do {
/* network to host order for our 32bit seqno and the
orig_interval */
batman_ogm_packet->seqno = ntohl(batman_ogm_packet->seqno);
batman_ogm_packet->tt_crc = ntohs(batman_ogm_packet->tt_crc);
tt_buff = packet_buff + buff_pos + BATMAN_OGM_LEN;
bat_ogm_process(ethhdr, batman_ogm_packet,
tt_buff, if_incoming);
buff_pos += BATMAN_OGM_LEN +
tt_len(batman_ogm_packet->tt_num_changes);
batman_ogm_packet = (struct batman_ogm_packet *)
(packet_buff + buff_pos);
} while (bat_ogm_aggr_packet(buff_pos, packet_len,
batman_ogm_packet->tt_num_changes));
}
net/batman-adv/aggregation.h → net/batman-adv/bat_ogm.h
View file @ 0c070900
...@@ -19,27 +19,17 @@ ...@@ -19,27 +19,17 @@
* *
*/ */
#ifndef _NET_BATMAN_ADV_AGGREGATION_H_ #ifndef _NET_BATMAN_ADV_OGM_H_
#define _NET_BATMAN_ADV_AGGREGATION_H_ #define _NET_BATMAN_ADV_OGM_H_
#include "main.h" #include "main.h"
/* is there another aggregated packet here? */ void bat_ogm_init(struct hard_iface *hard_iface);
static inline int aggregated_packet(int buff_pos, int packet_len, void bat_ogm_init_primary(struct hard_iface *hard_iface);
int tt_num_changes) void bat_ogm_update_mac(struct hard_iface *hard_iface);
{ void bat_ogm_schedule(struct hard_iface *hard_iface, int tt_num_changes);
int next_buff_pos = buff_pos + BAT_PACKET_LEN + tt_len(tt_num_changes); void bat_ogm_emit(struct forw_packet *forw_packet);
void bat_ogm_receive(const struct ethhdr *ethhdr, unsigned char *packet_buff,
int packet_len, struct hard_iface *if_incoming);
return (next_buff_pos <= packet_len) && #endif /* _NET_BATMAN_ADV_OGM_H_ */
(next_buff_pos <= MAX_AGGREGATION_BYTES);
}
void add_bat_packet_to_list(struct bat_priv *bat_priv,
unsigned char *packet_buff, int packet_len,
struct hard_iface *if_incoming, int own_packet,
unsigned long send_time);
void receive_aggr_bat_packet(const struct ethhdr *ethhdr,
unsigned char *packet_buff, int packet_len,
struct hard_iface *if_incoming);
#endif /* _NET_BATMAN_ADV_AGGREGATION_H_ */
net/batman-adv/hard-interface.c
View file @ 0c070900
...@@ -28,6 +28,7 @@ ...@@ -28,6 +28,7 @@
#include "bat_sysfs.h" #include "bat_sysfs.h"
#include "originator.h" #include "originator.h"
#include "hash.h" #include "hash.h"
#include "bat_ogm.h"
#include <linux/if_arp.h> #include <linux/if_arp.h>
...@@ -131,7 +132,6 @@ static void primary_if_select(struct bat_priv *bat_priv, ...@@ -131,7 +132,6 @@ static void primary_if_select(struct bat_priv *bat_priv,
struct hard_iface *new_hard_iface) struct hard_iface *new_hard_iface)
{ {
struct hard_iface *curr_hard_iface; struct hard_iface *curr_hard_iface;
struct batman_packet *batman_packet;
ASSERT_RTNL(); ASSERT_RTNL();
...@@ -147,10 +147,7 @@ static void primary_if_select(struct bat_priv *bat_priv, ...@@ -147,10 +147,7 @@ static void primary_if_select(struct bat_priv *bat_priv,
if (!new_hard_iface) if (!new_hard_iface)
return; return;
batman_packet = (struct batman_packet *)(new_hard_iface->packet_buff); bat_ogm_init_primary(new_hard_iface);
batman_packet->flags = PRIMARIES_FIRST_HOP;
batman_packet->ttl = TTL;
primary_if_update_addr(bat_priv); primary_if_update_addr(bat_priv);
} }
...@@ -162,14 +159,6 @@ static bool hardif_is_iface_up(const struct hard_iface *hard_iface) ...@@ -162,14 +159,6 @@ static bool hardif_is_iface_up(const struct hard_iface *hard_iface)
return false; return false;
} }
static void update_mac_addresses(struct hard_iface *hard_iface)
{
memcpy(((struct batman_packet *)(hard_iface->packet_buff))->orig,
hard_iface->net_dev->dev_addr, ETH_ALEN);
memcpy(((struct batman_packet *)(hard_iface->packet_buff))->prev_sender,
hard_iface->net_dev->dev_addr, ETH_ALEN);
}
static void check_known_mac_addr(const struct net_device *net_dev) static void check_known_mac_addr(const struct net_device *net_dev)
{ {
const struct hard_iface *hard_iface; const struct hard_iface *hard_iface;
...@@ -244,7 +233,7 @@ static void hardif_activate_interface(struct hard_iface *hard_iface) ...@@ -244,7 +233,7 @@ static void hardif_activate_interface(struct hard_iface *hard_iface)
bat_priv = netdev_priv(hard_iface->soft_iface); bat_priv = netdev_priv(hard_iface->soft_iface);
update_mac_addresses(hard_iface); bat_ogm_update_mac(hard_iface);
hard_iface->if_status = IF_TO_BE_ACTIVATED; hard_iface->if_status = IF_TO_BE_ACTIVATED;
/** /**
...@@ -283,7 +272,6 @@ int hardif_enable_interface(struct hard_iface *hard_iface, ...@@ -283,7 +272,6 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
const char *iface_name) const char *iface_name)
{ {
struct bat_priv *bat_priv; struct bat_priv *bat_priv;
struct batman_packet *batman_packet;
struct net_device *soft_iface; struct net_device *soft_iface;
int ret; int ret;
...@@ -318,8 +306,8 @@ int hardif_enable_interface(struct hard_iface *hard_iface, ...@@ -318,8 +306,8 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
hard_iface->soft_iface = soft_iface; hard_iface->soft_iface = soft_iface;
bat_priv = netdev_priv(hard_iface->soft_iface); bat_priv = netdev_priv(hard_iface->soft_iface);
hard_iface->packet_len = BAT_PACKET_LEN;
hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC); bat_ogm_init(hard_iface);
if (!hard_iface->packet_buff) { if (!hard_iface->packet_buff) {
bat_err(hard_iface->soft_iface, "Can't add interface packet " bat_err(hard_iface->soft_iface, "Can't add interface packet "
...@@ -328,15 +316,6 @@ int hardif_enable_interface(struct hard_iface *hard_iface, ...@@ -328,15 +316,6 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
goto err; goto err;
} }
batman_packet = (struct batman_packet *)(hard_iface->packet_buff);
batman_packet->packet_type = BAT_PACKET;
batman_packet->version = COMPAT_VERSION;
batman_packet->flags = NO_FLAGS;
batman_packet->ttl = 2;
batman_packet->tq = TQ_MAX_VALUE;
batman_packet->tt_num_changes = 0;
batman_packet->ttvn = 0;
hard_iface->if_num = bat_priv->num_ifaces; hard_iface->if_num = bat_priv->num_ifaces;
bat_priv->num_ifaces++; bat_priv->num_ifaces++;
hard_iface->if_status = IF_INACTIVE; hard_iface->if_status = IF_INACTIVE;
...@@ -381,7 +360,7 @@ int hardif_enable_interface(struct hard_iface *hard_iface, ...@@ -381,7 +360,7 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
hard_iface->net_dev->name); hard_iface->net_dev->name);
/* begin scheduling originator messages on that interface */ /* begin scheduling originator messages on that interface */
schedule_own_packet(hard_iface); schedule_bat_ogm(hard_iface);
out: out:
return 0; return 0;
...@@ -455,11 +434,8 @@ static struct hard_iface *hardif_add_interface(struct net_device *net_dev) ...@@ -455,11 +434,8 @@ static struct hard_iface *hardif_add_interface(struct net_device *net_dev)
dev_hold(net_dev); dev_hold(net_dev);
hard_iface = kmalloc(sizeof(*hard_iface), GFP_ATOMIC); hard_iface = kmalloc(sizeof(*hard_iface), GFP_ATOMIC);
if (!hard_iface) { if (!hard_iface)
pr_err("Can't add interface (%s): out of memory\n",
net_dev->name);
goto release_dev; goto release_dev;
}
ret = sysfs_add_hardif(&hard_iface->hardif_obj, net_dev); ret = sysfs_add_hardif(&hard_iface->hardif_obj, net_dev);
if (ret) if (ret)
...@@ -551,7 +527,7 @@ static int hard_if_event(struct notifier_block *this, ...@@ -551,7 +527,7 @@ static int hard_if_event(struct notifier_block *this,
goto hardif_put; goto hardif_put;
check_known_mac_addr(hard_iface->net_dev); check_known_mac_addr(hard_iface->net_dev);
update_mac_addresses(hard_iface); bat_ogm_update_mac(hard_iface);
bat_priv = netdev_priv(hard_iface->soft_iface); bat_priv = netdev_priv(hard_iface->soft_iface);
primary_if = primary_if_get_selected(bat_priv); primary_if = primary_if_get_selected(bat_priv);
...@@ -580,7 +556,7 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, ...@@ -580,7 +556,7 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
struct net_device *orig_dev) struct net_device *orig_dev)
{ {
struct bat_priv *bat_priv; struct bat_priv *bat_priv;
struct batman_packet *batman_packet; struct batman_ogm_packet *batman_ogm_packet;
struct hard_iface *hard_iface; struct hard_iface *hard_iface;
int ret; int ret;
...@@ -612,22 +588,22 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, ...@@ -612,22 +588,22 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
if (hard_iface->if_status != IF_ACTIVE) if (hard_iface->if_status != IF_ACTIVE)
goto err_free; goto err_free;
batman_packet = (struct batman_packet *)skb->data; batman_ogm_packet = (struct batman_ogm_packet *)skb->data;
if (batman_packet->version != COMPAT_VERSION) { if (batman_ogm_packet->version != COMPAT_VERSION) {
bat_dbg(DBG_BATMAN, bat_priv, bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: incompatible batman version (%i)\n", "Drop packet: incompatible batman version (%i)\n",
batman_packet->version); batman_ogm_packet->version);
goto err_free; goto err_free;
} }
/* all receive handlers return whether they received or reused /* all receive handlers return whether they received or reused
* the supplied skb. if not, we have to free the skb. */ * the supplied skb. if not, we have to free the skb. */
switch (batman_packet->packet_type) { switch (batman_ogm_packet->packet_type) {
/* batman originator packet */ /* batman originator packet */
case BAT_PACKET: case BAT_OGM:
ret = recv_bat_packet(skb, hard_iface); ret = recv_bat_ogm_packet(skb, hard_iface);
break; break;
/* batman icmp packet */ /* batman icmp packet */
......
net/batman-adv/main.c
View file @ 0c070900
...@@ -117,8 +117,6 @@ int mesh_init(struct net_device *soft_iface) ...@@ -117,8 +117,6 @@ int mesh_init(struct net_device *soft_iface)
goto end; goto end;
err: err:
pr_err("Unable to allocate memory for mesh information structures: "
"out of mem ?\n");
mesh_free(soft_iface); mesh_free(soft_iface);
return -1; return -1;
......
net/batman-adv/main.h
View file @ 0c070900
...@@ -28,7 +28,7 @@ ...@@ -28,7 +28,7 @@
#define DRIVER_DEVICE "batman-adv" #define DRIVER_DEVICE "batman-adv"
#ifndef SOURCE_VERSION #ifndef SOURCE_VERSION
#define SOURCE_VERSION "2011.3.0" #define SOURCE_VERSION "2011.4.0"
#endif #endif
/* B.A.T.M.A.N. parameters */ /* B.A.T.M.A.N. parameters */
......
net/batman-adv/originator.c
View file @ 0c070900
...@@ -336,8 +336,7 @@ static bool purge_orig_node(struct bat_priv *bat_priv, ...@@ -336,8 +336,7 @@ static bool purge_orig_node(struct bat_priv *bat_priv,
} else { } else {
if (purge_orig_neighbors(bat_priv, orig_node, if (purge_orig_neighbors(bat_priv, orig_node,
&best_neigh_node)) { &best_neigh_node)) {
update_routes(bat_priv, orig_node, update_route(bat_priv, orig_node, best_neigh_node);
best_neigh_node);
} }
} }
...@@ -493,10 +492,8 @@ static int orig_node_add_if(struct orig_node *orig_node, int max_if_num) ...@@ -493,10 +492,8 @@ static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)
data_ptr = kmalloc(max_if_num * sizeof(unsigned long) * NUM_WORDS, data_ptr = kmalloc(max_if_num * sizeof(unsigned long) * NUM_WORDS,
GFP_ATOMIC); GFP_ATOMIC);
if (!data_ptr) { if (!data_ptr)
pr_err("Can't resize orig: out of memory\n");
return -1; return -1;
}
memcpy(data_ptr, orig_node->bcast_own, memcpy(data_ptr, orig_node->bcast_own,
(max_if_num - 1) * sizeof(unsigned long) * NUM_WORDS); (max_if_num - 1) * sizeof(unsigned long) * NUM_WORDS);
...@@ -504,10 +501,8 @@ static int orig_node_add_if(struct orig_node *orig_node, int max_if_num) ...@@ -504,10 +501,8 @@ static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)
orig_node->bcast_own = data_ptr; orig_node->bcast_own = data_ptr;
data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
if (!data_ptr) { if (!data_ptr)
pr_err("Can't resize orig: out of memory\n");
return -1; return -1;
}
memcpy(data_ptr, orig_node->bcast_own_sum, memcpy(data_ptr, orig_node->bcast_own_sum,
(max_if_num - 1) * sizeof(uint8_t)); (max_if_num - 1) * sizeof(uint8_t));
...@@ -562,10 +557,8 @@ static int orig_node_del_if(struct orig_node *orig_node, ...@@ -562,10 +557,8 @@ static int orig_node_del_if(struct orig_node *orig_node,
chunk_size = sizeof(unsigned long) * NUM_WORDS; chunk_size = sizeof(unsigned long) * NUM_WORDS;
data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC); data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
if (!data_ptr) { if (!data_ptr)
pr_err("Can't resize orig: out of memory\n");
return -1; return -1;
}
/* copy first part */ /* copy first part */
memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size); memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
...@@ -583,10 +576,8 @@ static int orig_node_del_if(struct orig_node *orig_node, ...@@ -583,10 +576,8 @@ static int orig_node_del_if(struct orig_node *orig_node,
goto free_own_sum; goto free_own_sum;
data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
if (!data_ptr) { if (!data_ptr)
pr_err("Can't resize orig: out of memory\n");
return -1; return -1;
}
memcpy(data_ptr, orig_node->bcast_own_sum, memcpy(data_ptr, orig_node->bcast_own_sum,
del_if_num * sizeof(uint8_t)); del_if_num * sizeof(uint8_t));
......
net/batman-adv/packet.h
View file @ 0c070900
...@@ -25,7 +25,7 @@ ...@@ -25,7 +25,7 @@
#define ETH_P_BATMAN 0x4305 /* unofficial/not registered Ethertype */ #define ETH_P_BATMAN 0x4305 /* unofficial/not registered Ethertype */
enum bat_packettype { enum bat_packettype {
BAT_PACKET = 0x01, BAT_OGM = 0x01,
BAT_ICMP = 0x02, BAT_ICMP = 0x02,
BAT_UNICAST = 0x03, BAT_UNICAST = 0x03,
BAT_BCAST = 0x04, BAT_BCAST = 0x04,
...@@ -90,7 +90,7 @@ enum tt_client_flags { ...@@ -90,7 +90,7 @@ enum tt_client_flags {
TT_CLIENT_PENDING = 1 << 10 TT_CLIENT_PENDING = 1 << 10
}; };
struct batman_packet { struct batman_ogm_packet {
uint8_t packet_type; uint8_t packet_type;
uint8_t version; /* batman version field */ uint8_t version; /* batman version field */
uint8_t ttl; uint8_t ttl;
...@@ -105,7 +105,7 @@ struct batman_packet { ...@@ -105,7 +105,7 @@ struct batman_packet {
uint16_t tt_crc; uint16_t tt_crc;
} __packed; } __packed;
#define BAT_PACKET_LEN sizeof(struct batman_packet) #define BATMAN_OGM_LEN sizeof(struct batman_ogm_packet)
struct icmp_packet { struct icmp_packet {
uint8_t packet_type; uint8_t packet_type;
......
net/batman-adv/routing.c
View file @ 0c070900
...@@ -22,18 +22,14 @@ ...@@ -22,18 +22,14 @@
#include "main.h" #include "main.h"
#include "routing.h" #include "routing.h"
#include "send.h" #include "send.h"
#include "hash.h"
#include "soft-interface.h" #include "soft-interface.h"
#include "hard-interface.h" #include "hard-interface.h"
#include "icmp_socket.h" #include "icmp_socket.h"
#include "translation-table.h" #include "translation-table.h"
#include "originator.h" #include "originator.h"
#include "ring_buffer.h"
#include "vis.h" #include "vis.h"
#include "aggregation.h"
#include "gateway_common.h"
#include "gateway_client.h"
#include "unicast.h" #include "unicast.h"
#include "bat_ogm.h"
void slide_own_bcast_window(struct hard_iface *hard_iface) void slide_own_bcast_window(struct hard_iface *hard_iface)
{ {
...@@ -64,7 +60,7 @@ void slide_own_bcast_window(struct hard_iface *hard_iface) ...@@ -64,7 +60,7 @@ void slide_own_bcast_window(struct hard_iface *hard_iface)
} }
} }
static void update_route(struct bat_priv *bat_priv, static void _update_route(struct bat_priv *bat_priv,
struct orig_node *orig_node, struct orig_node *orig_node,
struct neigh_node *neigh_node) struct neigh_node *neigh_node)
{ {
...@@ -110,7 +106,7 @@ static void update_route(struct bat_priv *bat_priv, ...@@ -110,7 +106,7 @@ static void update_route(struct bat_priv *bat_priv,
neigh_node_free_ref(curr_router); neigh_node_free_ref(curr_router);
} }
void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node, void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
struct neigh_node *neigh_node) struct neigh_node *neigh_node)
{ {
struct neigh_node *router = NULL; struct neigh_node *router = NULL;
...@@ -121,116 +117,13 @@ void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node, ...@@ -121,116 +117,13 @@ void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
router = orig_node_get_router(orig_node); router = orig_node_get_router(orig_node);
if (router != neigh_node) if (router != neigh_node)
update_route(bat_priv, orig_node, neigh_node); _update_route(bat_priv, orig_node, neigh_node);
out: out:
if (router) if (router)
neigh_node_free_ref(router); neigh_node_free_ref(router);
} }
static int is_bidirectional_neigh(struct orig_node *orig_node,
struct orig_node *orig_neigh_node,
struct batman_packet *batman_packet,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *neigh_node = NULL, *tmp_neigh_node;
struct hlist_node *node;
uint8_t total_count;
uint8_t orig_eq_count, neigh_rq_count, tq_own;
int tq_asym_penalty, ret = 0;
/* find corresponding one hop neighbor */
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_neigh_node->neigh_list, list) {
if (!compare_eth(tmp_neigh_node->addr, orig_neigh_node->orig))
continue;
if (tmp_neigh_node->if_incoming != if_incoming)
continue;
if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
continue;
neigh_node = tmp_neigh_node;
break;
}
rcu_read_unlock();
if (!neigh_node)
neigh_node = create_neighbor(orig_neigh_node,
orig_neigh_node,
orig_neigh_node->orig,
if_incoming);
if (!neigh_node)
goto out;
/* if orig_node is direct neighbor update neigh_node last_valid */
if (orig_node == orig_neigh_node)
neigh_node->last_valid = jiffies;
orig_node->last_valid = jiffies;
/* find packet count of corresponding one hop neighbor */
spin_lock_bh(&orig_node->ogm_cnt_lock);
orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num];
neigh_rq_count = neigh_node->real_packet_count;
spin_unlock_bh(&orig_node->ogm_cnt_lock);
/* pay attention to not get a value bigger than 100 % */
total_count = (orig_eq_count > neigh_rq_count ?
neigh_rq_count : orig_eq_count);
/* if we have too few packets (too less data) we set tq_own to zero */
/* if we receive too few packets it is not considered bidirectional */
if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) ||
(neigh_rq_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
tq_own = 0;
else
/* neigh_node->real_packet_count is never zero as we
* only purge old information when getting new
* information */
tq_own = (TQ_MAX_VALUE * total_count) / neigh_rq_count;
/*
* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
* affect the nearly-symmetric links only a little, but
* punishes asymmetric links more. This will give a value
* between 0 and TQ_MAX_VALUE
*/
tq_asym_penalty = TQ_MAX_VALUE - (TQ_MAX_VALUE *
(TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
(TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
(TQ_LOCAL_WINDOW_SIZE - neigh_rq_count)) /
(TQ_LOCAL_WINDOW_SIZE *
TQ_LOCAL_WINDOW_SIZE *
TQ_LOCAL_WINDOW_SIZE);
batman_packet->tq = ((batman_packet->tq * tq_own * tq_asym_penalty) /
(TQ_MAX_VALUE * TQ_MAX_VALUE));
bat_dbg(DBG_BATMAN, bat_priv,
"bidirectional: "
"orig = %-15pM neigh = %-15pM => own_bcast = %2i, "
"real recv = %2i, local tq: %3i, asym_penalty: %3i, "
"total tq: %3i\n",
orig_node->orig, orig_neigh_node->orig, total_count,
neigh_rq_count, tq_own, tq_asym_penalty, batman_packet->tq);
/* if link has the minimum required transmission quality
* consider it bidirectional */
if (batman_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT)
ret = 1;
out:
if (neigh_node)
neigh_node_free_ref(neigh_node);
return ret;
}
/* caller must hold the neigh_list_lock */ /* caller must hold the neigh_list_lock */
void bonding_candidate_del(struct orig_node *orig_node, void bonding_candidate_del(struct orig_node *orig_node,
struct neigh_node *neigh_node) struct neigh_node *neigh_node)
...@@ -248,7 +141,7 @@ void bonding_candidate_del(struct orig_node *orig_node, ...@@ -248,7 +141,7 @@ void bonding_candidate_del(struct orig_node *orig_node,
return; return;
} }
static void bonding_candidate_add(struct orig_node *orig_node, void bonding_candidate_add(struct orig_node *orig_node,
struct neigh_node *neigh_node) struct neigh_node *neigh_node)
{ {
struct hlist_node *node; struct hlist_node *node;
...@@ -319,160 +212,22 @@ static void bonding_candidate_add(struct orig_node *orig_node, ...@@ -319,160 +212,22 @@ static void bonding_candidate_add(struct orig_node *orig_node,
} }
/* copy primary address for bonding */ /* copy primary address for bonding */
static void bonding_save_primary(const struct orig_node *orig_node, void bonding_save_primary(const struct orig_node *orig_node,
struct orig_node *orig_neigh_node, struct orig_node *orig_neigh_node,
const struct batman_packet *batman_packet) const struct batman_ogm_packet *batman_ogm_packet)
{ {
if (!(batman_packet->flags & PRIMARIES_FIRST_HOP)) if (!(batman_ogm_packet->flags & PRIMARIES_FIRST_HOP))
return; return;
memcpy(orig_neigh_node->primary_addr, orig_node->orig, ETH_ALEN); memcpy(orig_neigh_node->primary_addr, orig_node->orig, ETH_ALEN);
} }
static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
const struct ethhdr *ethhdr,
const struct batman_packet *batman_packet,
struct hard_iface *if_incoming,
const unsigned char *tt_buff, int is_duplicate)
{
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
struct neigh_node *router = NULL;
struct orig_node *orig_node_tmp;
struct hlist_node *node;
uint8_t bcast_own_sum_orig, bcast_own_sum_neigh;
bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
"Searching and updating originator entry of received packet\n");
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
(tmp_neigh_node->if_incoming == if_incoming) &&
atomic_inc_not_zero(&tmp_neigh_node->refcount)) {
if (neigh_node)
neigh_node_free_ref(neigh_node);
neigh_node = tmp_neigh_node;
continue;
}
if (is_duplicate)
continue;
spin_lock_bh(&tmp_neigh_node->tq_lock);
ring_buffer_set(tmp_neigh_node->tq_recv,
&tmp_neigh_node->tq_index, 0);
tmp_neigh_node->tq_avg =
ring_buffer_avg(tmp_neigh_node->tq_recv);
spin_unlock_bh(&tmp_neigh_node->tq_lock);
}
if (!neigh_node) {
struct orig_node *orig_tmp;
orig_tmp = get_orig_node(bat_priv, ethhdr->h_source);
if (!orig_tmp)
goto unlock;
neigh_node = create_neighbor(orig_node, orig_tmp,
ethhdr->h_source, if_incoming);
orig_node_free_ref(orig_tmp);
if (!neigh_node)
goto unlock;
} else
bat_dbg(DBG_BATMAN, bat_priv,
"Updating existing last-hop neighbor of originator\n");
rcu_read_unlock();
orig_node->flags = batman_packet->flags;
neigh_node->last_valid = jiffies;
spin_lock_bh(&neigh_node->tq_lock);
ring_buffer_set(neigh_node->tq_recv,
&neigh_node->tq_index,
batman_packet->tq);
neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv);
spin_unlock_bh(&neigh_node->tq_lock);
if (!is_duplicate) {
orig_node->last_ttl = batman_packet->ttl;
neigh_node->last_ttl = batman_packet->ttl;
}
bonding_candidate_add(orig_node, neigh_node);
/* if this neighbor already is our next hop there is nothing
* to change */
router = orig_node_get_router(orig_node);
if (router == neigh_node)
goto update_tt;
/* if this neighbor does not offer a better TQ we won't consider it */
if (router && (router->tq_avg > neigh_node->tq_avg))
goto update_tt;
/* if the TQ is the same and the link not more symmetric we
* won't consider it either */
if (router && (neigh_node->tq_avg == router->tq_avg)) {
orig_node_tmp = router->orig_node;
spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
bcast_own_sum_orig =
orig_node_tmp->bcast_own_sum[if_incoming->if_num];
spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
orig_node_tmp = neigh_node->orig_node;
spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
bcast_own_sum_neigh =
orig_node_tmp->bcast_own_sum[if_incoming->if_num];
spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
if (bcast_own_sum_orig >= bcast_own_sum_neigh)
goto update_tt;
}
update_routes(bat_priv, orig_node, neigh_node);
update_tt:
/* I have to check for transtable changes only if the OGM has been
* sent through a primary interface */
if (((batman_packet->orig != ethhdr->h_source) &&
(batman_packet->ttl > 2)) ||
(batman_packet->flags & PRIMARIES_FIRST_HOP))
tt_update_orig(bat_priv, orig_node, tt_buff,
batman_packet->tt_num_changes,
batman_packet->ttvn, batman_packet->tt_crc);
if (orig_node->gw_flags != batman_packet->gw_flags)
gw_node_update(bat_priv, orig_node, batman_packet->gw_flags);
orig_node->gw_flags = batman_packet->gw_flags;
/* restart gateway selection if fast or late switching was enabled */
if ((orig_node->gw_flags) &&
(atomic_read(&bat_priv->gw_mode) == GW_MODE_CLIENT) &&
(atomic_read(&bat_priv->gw_sel_class) > 2))
gw_check_election(bat_priv, orig_node);
goto out;
unlock:
rcu_read_unlock();
out:
if (neigh_node)
neigh_node_free_ref(neigh_node);
if (router)
neigh_node_free_ref(router);
}
/* checks whether the host restarted and is in the protection time. /* checks whether the host restarted and is in the protection time.
* returns: * returns:
* 0 if the packet is to be accepted * 0 if the packet is to be accepted
* 1 if the packet is to be ignored. * 1 if the packet is to be ignored.
*/ */
static int window_protected(struct bat_priv *bat_priv, int window_protected(struct bat_priv *bat_priv, int32_t seq_num_diff,
int32_t seq_num_diff,
unsigned long *last_reset) unsigned long *last_reset)
{ {
if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE) if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE)
...@@ -491,330 +246,12 @@ static int window_protected(struct bat_priv *bat_priv, ...@@ -491,330 +246,12 @@ static int window_protected(struct bat_priv *bat_priv,
return 0; return 0;
} }
/* processes a batman packet for all interfaces, adjusts the sequence number and int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
* finds out whether it is a duplicate.
* returns:
* 1 the packet is a duplicate
* 0 the packet has not yet been received
* -1 the packet is old and has been received while the seqno window
* was protected. Caller should drop it.
*/
static int count_real_packets(const struct ethhdr *ethhdr,
const struct batman_packet *batman_packet,
const struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct orig_node *orig_node;
struct neigh_node *tmp_neigh_node;
struct hlist_node *node;
int is_duplicate = 0;
int32_t seq_diff;
int need_update = 0;
int set_mark, ret = -1;
orig_node = get_orig_node(bat_priv, batman_packet->orig);
if (!orig_node)
return 0;
spin_lock_bh(&orig_node->ogm_cnt_lock);
seq_diff = batman_packet->seqno - orig_node->last_real_seqno;
/* signalize caller that the packet is to be dropped. */
if (window_protected(bat_priv, seq_diff,
&orig_node->batman_seqno_reset))
goto out;
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
is_duplicate |= get_bit_status(tmp_neigh_node->real_bits,
orig_node->last_real_seqno,
batman_packet->seqno);
if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
(tmp_neigh_node->if_incoming == if_incoming))
set_mark = 1;
else
set_mark = 0;
/* if the window moved, set the update flag. */
need_update |= bit_get_packet(bat_priv,
tmp_neigh_node->real_bits,
seq_diff, set_mark);
tmp_neigh_node->real_packet_count =
bit_packet_count(tmp_neigh_node->real_bits);
}
rcu_read_unlock();
if (need_update) {
bat_dbg(DBG_BATMAN, bat_priv,
"updating last_seqno: old %d, new %d\n",
orig_node->last_real_seqno, batman_packet->seqno);
orig_node->last_real_seqno = batman_packet->seqno;
}
ret = is_duplicate;
out:
spin_unlock_bh(&orig_node->ogm_cnt_lock);
orig_node_free_ref(orig_node);
return ret;
}
void receive_bat_packet(const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
const unsigned char *tt_buff,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct hard_iface *hard_iface;
struct orig_node *orig_neigh_node, *orig_node;
struct neigh_node *router = NULL, *router_router = NULL;
struct neigh_node *orig_neigh_router = NULL;
int has_directlink_flag;
int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
int is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
int is_duplicate;
uint32_t if_incoming_seqno;
/* Silently drop when the batman packet is actually not a
* correct packet.
*
* This might happen if a packet is padded (e.g. Ethernet has a
* minimum frame length of 64 byte) and the aggregation interprets
* it as an additional length.
*
* TODO: A more sane solution would be to have a bit in the
* batman_packet to detect whether the packet is the last
* packet in an aggregation. Here we expect that the padding
* is always zero (or not 0x01)
*/
if (batman_packet->packet_type != BAT_PACKET)
return;
/* could be changed by schedule_own_packet() */
if_incoming_seqno = atomic_read(&if_incoming->seqno);
has_directlink_flag = (batman_packet->flags & DIRECTLINK ? 1 : 0);
is_single_hop_neigh = (compare_eth(ethhdr->h_source,
batman_packet->orig) ? 1 : 0);
bat_dbg(DBG_BATMAN, bat_priv,
"Received BATMAN packet via NB: %pM, IF: %s [%pM] "
"(from OG: %pM, via prev OG: %pM, seqno %d, ttvn %u, "
"crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
ethhdr->h_source, if_incoming->net_dev->name,
if_incoming->net_dev->dev_addr, batman_packet->orig,
batman_packet->prev_sender, batman_packet->seqno,
batman_packet->ttvn, batman_packet->tt_crc,
batman_packet->tt_num_changes, batman_packet->tq,
batman_packet->ttl, batman_packet->version,
has_directlink_flag);
rcu_read_lock();
list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
if (hard_iface->if_status != IF_ACTIVE)
continue;
if (hard_iface->soft_iface != if_incoming->soft_iface)
continue;
if (compare_eth(ethhdr->h_source,
hard_iface->net_dev->dev_addr))
is_my_addr = 1;
if (compare_eth(batman_packet->orig,
hard_iface->net_dev->dev_addr))
is_my_orig = 1;
if (compare_eth(batman_packet->prev_sender,
hard_iface->net_dev->dev_addr))
is_my_oldorig = 1;
if (is_broadcast_ether_addr(ethhdr->h_source))
is_broadcast = 1;
}
rcu_read_unlock();
if (batman_packet->version != COMPAT_VERSION) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: incompatible batman version (%i)\n",
batman_packet->version);
return;
}
if (is_my_addr) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: received my own broadcast (sender: %pM"
")\n",
ethhdr->h_source);
return;
}
if (is_broadcast) {
bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
"ignoring all packets with broadcast source addr (sender: %pM"
")\n", ethhdr->h_source);
return;
}
if (is_my_orig) {
unsigned long *word;
int offset;
orig_neigh_node = get_orig_node(bat_priv, ethhdr->h_source);
if (!orig_neigh_node)
return;
/* neighbor has to indicate direct link and it has to
* come via the corresponding interface */
/* save packet seqno for bidirectional check */
if (has_directlink_flag &&
compare_eth(if_incoming->net_dev->dev_addr,
batman_packet->orig)) {
offset = if_incoming->if_num * NUM_WORDS;
spin_lock_bh(&orig_neigh_node->ogm_cnt_lock);
word = &(orig_neigh_node->bcast_own[offset]);
bit_mark(word,
if_incoming_seqno - batman_packet->seqno - 2);
orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
bit_packet_count(word);
spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock);
}
bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
"originator packet from myself (via neighbor)\n");
orig_node_free_ref(orig_neigh_node);
return;
}
if (is_my_oldorig) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: ignoring all rebroadcast echos (sender: "
"%pM)\n", ethhdr->h_source);
return;
}
orig_node = get_orig_node(bat_priv, batman_packet->orig);
if (!orig_node)
return;
is_duplicate = count_real_packets(ethhdr, batman_packet, if_incoming);
if (is_duplicate == -1) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: packet within seqno protection time "
"(sender: %pM)\n", ethhdr->h_source);
goto out;
}
if (batman_packet->tq == 0) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: originator packet with tq equal 0\n");
goto out;
}
router = orig_node_get_router(orig_node);
if (router)
router_router = orig_node_get_router(router->orig_node);
/* avoid temporary routing loops */
if (router && router_router &&
(compare_eth(router->addr, batman_packet->prev_sender)) &&
!(compare_eth(batman_packet->orig, batman_packet->prev_sender)) &&
(compare_eth(router->addr, router_router->addr))) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: ignoring all rebroadcast packets that "
"may make me loop (sender: %pM)\n", ethhdr->h_source);
goto out;
}
/* if sender is a direct neighbor the sender mac equals
* originator mac */
orig_neigh_node = (is_single_hop_neigh ?
orig_node :
get_orig_node(bat_priv, ethhdr->h_source));
if (!orig_neigh_node)
goto out;
orig_neigh_router = orig_node_get_router(orig_neigh_node);
/* drop packet if sender is not a direct neighbor and if we
* don't route towards it */
if (!is_single_hop_neigh && (!orig_neigh_router)) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: OGM via unknown neighbor!\n");
goto out_neigh;
}
is_bidirectional = is_bidirectional_neigh(orig_node, orig_neigh_node,
batman_packet, if_incoming);
bonding_save_primary(orig_node, orig_neigh_node, batman_packet);
/* update ranking if it is not a duplicate or has the same
* seqno and similar ttl as the non-duplicate */
if (is_bidirectional &&
(!is_duplicate ||
((orig_node->last_real_seqno == batman_packet->seqno) &&
(orig_node->last_ttl - 3 <= batman_packet->ttl))))
update_orig(bat_priv, orig_node, ethhdr, batman_packet,
if_incoming, tt_buff, is_duplicate);
/* is single hop (direct) neighbor */
if (is_single_hop_neigh) {
/* mark direct link on incoming interface */
schedule_forward_packet(orig_node, ethhdr, batman_packet,
1, if_incoming);
bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
"rebroadcast neighbor packet with direct link flag\n");
goto out_neigh;
}
/* multihop originator */
if (!is_bidirectional) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: not received via bidirectional link\n");
goto out_neigh;
}
if (is_duplicate) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: duplicate packet received\n");
goto out_neigh;
}
bat_dbg(DBG_BATMAN, bat_priv,
"Forwarding packet: rebroadcast originator packet\n");
schedule_forward_packet(orig_node, ethhdr, batman_packet,
0, if_incoming);
out_neigh:
if ((orig_neigh_node) && (!is_single_hop_neigh))
orig_node_free_ref(orig_neigh_node);
out:
if (router)
neigh_node_free_ref(router);
if (router_router)
neigh_node_free_ref(router_router);
if (orig_neigh_router)
neigh_node_free_ref(orig_neigh_router);
orig_node_free_ref(orig_node);
}
int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
{ {
struct ethhdr *ethhdr; struct ethhdr *ethhdr;
/* drop packet if it has not necessary minimum size */ /* drop packet if it has not necessary minimum size */
if (unlikely(!pskb_may_pull(skb, sizeof(struct batman_packet)))) if (unlikely(!pskb_may_pull(skb, BATMAN_OGM_LEN)))
return NET_RX_DROP; return NET_RX_DROP;
ethhdr = (struct ethhdr *)skb_mac_header(skb); ethhdr = (struct ethhdr *)skb_mac_header(skb);
...@@ -837,10 +274,7 @@ int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface) ...@@ -837,10 +274,7 @@ int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
ethhdr = (struct ethhdr *)skb_mac_header(skb); ethhdr = (struct ethhdr *)skb_mac_header(skb);
receive_aggr_bat_packet(ethhdr, bat_ogm_receive(ethhdr, skb->data, skb_headlen(skb), hard_iface);
skb->data,
skb_headlen(skb),
hard_iface);
kfree_skb(skb); kfree_skb(skb);
return NET_RX_SUCCESS; return NET_RX_SUCCESS;
......
net/batman-adv/routing.h
View file @ 0c070900
...@@ -23,11 +23,7 @@ ...@@ -23,11 +23,7 @@
#define _NET_BATMAN_ADV_ROUTING_H_ #define _NET_BATMAN_ADV_ROUTING_H_
void slide_own_bcast_window(struct hard_iface *hard_iface); void slide_own_bcast_window(struct hard_iface *hard_iface);
void receive_bat_packet(const struct ethhdr *ethhdr, void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
struct batman_packet *batman_packet,
const unsigned char *tt_buff,
struct hard_iface *if_incoming);
void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
struct neigh_node *neigh_node); struct neigh_node *neigh_node);
int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if); int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if);
...@@ -35,7 +31,7 @@ int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if); ...@@ -35,7 +31,7 @@ int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_bat_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if); int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if); int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if);
struct neigh_node *find_router(struct bat_priv *bat_priv, struct neigh_node *find_router(struct bat_priv *bat_priv,
...@@ -43,5 +39,12 @@ struct neigh_node *find_router(struct bat_priv *bat_priv, ...@@ -43,5 +39,12 @@ struct neigh_node *find_router(struct bat_priv *bat_priv,
const struct hard_iface *recv_if); const struct hard_iface *recv_if);
void bonding_candidate_del(struct orig_node *orig_node, void bonding_candidate_del(struct orig_node *orig_node,
struct neigh_node *neigh_node); struct neigh_node *neigh_node);
void bonding_candidate_add(struct orig_node *orig_node,
struct neigh_node *neigh_node);
void bonding_save_primary(const struct orig_node *orig_node,
struct orig_node *orig_neigh_node,
const struct batman_ogm_packet *batman_ogm_packet);
int window_protected(struct bat_priv *bat_priv, int32_t seq_num_diff,
unsigned long *last_reset);
#endif /* _NET_BATMAN_ADV_ROUTING_H_ */ #endif /* _NET_BATMAN_ADV_ROUTING_H_ */
net/batman-adv/send.c
View file @ 0c070900
...@@ -26,33 +26,12 @@ ...@@ -26,33 +26,12 @@
#include "soft-interface.h" #include "soft-interface.h"
#include "hard-interface.h" #include "hard-interface.h"
#include "vis.h" #include "vis.h"
#include "aggregation.h"
#include "gateway_common.h" #include "gateway_common.h"
#include "originator.h" #include "originator.h"
#include "bat_ogm.h"
static void send_outstanding_bcast_packet(struct work_struct *work); static void send_outstanding_bcast_packet(struct work_struct *work);
/* apply hop penalty for a normal link */
static uint8_t hop_penalty(uint8_t tq, const struct bat_priv *bat_priv)
{
int hop_penalty = atomic_read(&bat_priv->hop_penalty);
return (tq * (TQ_MAX_VALUE - hop_penalty)) / (TQ_MAX_VALUE);
}
/* when do we schedule our own packet to be sent */
static unsigned long own_send_time(const struct bat_priv *bat_priv)
{
return jiffies + msecs_to_jiffies(
atomic_read(&bat_priv->orig_interval) -
JITTER + (random32() % 2*JITTER));
}
/* when do we schedule a forwarded packet to be sent */
static unsigned long forward_send_time(void)
{
return jiffies + msecs_to_jiffies(random32() % (JITTER/2));
}
/* send out an already prepared packet to the given address via the /* send out an already prepared packet to the given address via the
* specified batman interface */ * specified batman interface */
int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface, int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface,
...@@ -99,141 +78,17 @@ int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface, ...@@ -99,141 +78,17 @@ int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface,
return NET_XMIT_DROP; return NET_XMIT_DROP;
} }
/* Send a packet to a given interface */
static void send_packet_to_if(struct forw_packet *forw_packet,
struct hard_iface *hard_iface)
{
struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
char *fwd_str;
uint8_t packet_num;
int16_t buff_pos;
struct batman_packet *batman_packet;
struct sk_buff *skb;
if (hard_iface->if_status != IF_ACTIVE)
return;
packet_num = 0;
buff_pos = 0;
batman_packet = (struct batman_packet *)forw_packet->skb->data;
/* adjust all flags and log packets */
while (aggregated_packet(buff_pos,
forw_packet->packet_len,
batman_packet->tt_num_changes)) {
/* we might have aggregated direct link packets with an
* ordinary base packet */
if ((forw_packet->direct_link_flags & (1 << packet_num)) &&
(forw_packet->if_incoming == hard_iface))
batman_packet->flags |= DIRECTLINK;
else
batman_packet->flags &= ~DIRECTLINK;
fwd_str = (packet_num > 0 ? "Forwarding" : (forw_packet->own ?
"Sending own" :
"Forwarding"));
bat_dbg(DBG_BATMAN, bat_priv,
"%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d,"
" IDF %s, ttvn %d) on interface %s [%pM]\n",
fwd_str, (packet_num > 0 ? "aggregated " : ""),
batman_packet->orig, ntohl(batman_packet->seqno),
batman_packet->tq, batman_packet->ttl,
(batman_packet->flags & DIRECTLINK ?
"on" : "off"),
batman_packet->ttvn, hard_iface->net_dev->name,
hard_iface->net_dev->dev_addr);
buff_pos += sizeof(*batman_packet) +
tt_len(batman_packet->tt_num_changes);
packet_num++;
batman_packet = (struct batman_packet *)
(forw_packet->skb->data + buff_pos);
}
/* create clone because function is called more than once */
skb = skb_clone(forw_packet->skb, GFP_ATOMIC);
if (skb)
send_skb_packet(skb, hard_iface, broadcast_addr);
}
/* send a batman packet */
static void send_packet(struct forw_packet *forw_packet)
{
struct hard_iface *hard_iface;
struct net_device *soft_iface;
struct bat_priv *bat_priv;
struct hard_iface *primary_if = NULL;
struct batman_packet *batman_packet =
(struct batman_packet *)(forw_packet->skb->data);
int directlink = (batman_packet->flags & DIRECTLINK ? 1 : 0);
if (!forw_packet->if_incoming) {
pr_err("Error - can't forward packet: incoming iface not "
"specified\n");
goto out;
}
soft_iface = forw_packet->if_incoming->soft_iface;
bat_priv = netdev_priv(soft_iface);
if (forw_packet->if_incoming->if_status != IF_ACTIVE)
goto out;
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
/* multihomed peer assumed */
/* non-primary OGMs are only broadcasted on their interface */
if ((directlink && (batman_packet->ttl == 1)) ||
(forw_packet->own && (forw_packet->if_incoming != primary_if))) {
/* FIXME: what about aggregated packets ? */
bat_dbg(DBG_BATMAN, bat_priv,
"%s packet (originator %pM, seqno %d, TTL %d) "
"on interface %s [%pM]\n",
(forw_packet->own ? "Sending own" : "Forwarding"),
batman_packet->orig, ntohl(batman_packet->seqno),
batman_packet->ttl,
forw_packet->if_incoming->net_dev->name,
forw_packet->if_incoming->net_dev->dev_addr);
/* skb is only used once and than forw_packet is free'd */
send_skb_packet(forw_packet->skb, forw_packet->if_incoming,
broadcast_addr);
forw_packet->skb = NULL;
goto out;
}
/* broadcast on every interface */
rcu_read_lock();
list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
if (hard_iface->soft_iface != soft_iface)
continue;
send_packet_to_if(forw_packet, hard_iface);
}
rcu_read_unlock();
out:
if (primary_if)
hardif_free_ref(primary_if);
}
static void realloc_packet_buffer(struct hard_iface *hard_iface, static void realloc_packet_buffer(struct hard_iface *hard_iface,
int new_len) int new_len)
{ {
unsigned char *new_buff; unsigned char *new_buff;
struct batman_packet *batman_packet;
new_buff = kmalloc(new_len, GFP_ATOMIC); new_buff = kmalloc(new_len, GFP_ATOMIC);
/* keep old buffer if kmalloc should fail */ /* keep old buffer if kmalloc should fail */
if (new_buff) { if (new_buff) {
memcpy(new_buff, hard_iface->packet_buff, memcpy(new_buff, hard_iface->packet_buff,
sizeof(*batman_packet)); BATMAN_OGM_LEN);
kfree(hard_iface->packet_buff); kfree(hard_iface->packet_buff);
hard_iface->packet_buff = new_buff; hard_iface->packet_buff = new_buff;
...@@ -242,60 +97,48 @@ static void realloc_packet_buffer(struct hard_iface *hard_iface, ...@@ -242,60 +97,48 @@ static void realloc_packet_buffer(struct hard_iface *hard_iface,
} }
/* when calling this function (hard_iface == primary_if) has to be true */ /* when calling this function (hard_iface == primary_if) has to be true */
static void prepare_packet_buffer(struct bat_priv *bat_priv, static int prepare_packet_buffer(struct bat_priv *bat_priv,
struct hard_iface *hard_iface) struct hard_iface *hard_iface)
{ {
int new_len; int new_len;
struct batman_packet *batman_packet;
new_len = BAT_PACKET_LEN + new_len = BATMAN_OGM_LEN +
tt_len((uint8_t)atomic_read(&bat_priv->tt_local_changes)); tt_len((uint8_t)atomic_read(&bat_priv->tt_local_changes));
/* if we have too many changes for one packet don't send any /* if we have too many changes for one packet don't send any
* and wait for the tt table request which will be fragmented */ * and wait for the tt table request which will be fragmented */
if (new_len > hard_iface->soft_iface->mtu) if (new_len > hard_iface->soft_iface->mtu)
new_len = BAT_PACKET_LEN; new_len = BATMAN_OGM_LEN;
realloc_packet_buffer(hard_iface, new_len); realloc_packet_buffer(hard_iface, new_len);
batman_packet = (struct batman_packet *)hard_iface->packet_buff;
atomic_set(&bat_priv->tt_crc, tt_local_crc(bat_priv)); atomic_set(&bat_priv->tt_crc, tt_local_crc(bat_priv));
/* reset the sending counter */ /* reset the sending counter */
atomic_set(&bat_priv->tt_ogm_append_cnt, TT_OGM_APPEND_MAX); atomic_set(&bat_priv->tt_ogm_append_cnt, TT_OGM_APPEND_MAX);
batman_packet->tt_num_changes = tt_changes_fill_buffer(bat_priv, return tt_changes_fill_buffer(bat_priv,
hard_iface->packet_buff + BAT_PACKET_LEN, hard_iface->packet_buff + BATMAN_OGM_LEN,
hard_iface->packet_len - BAT_PACKET_LEN); hard_iface->packet_len - BATMAN_OGM_LEN);
} }
static void reset_packet_buffer(struct bat_priv *bat_priv, static int reset_packet_buffer(struct bat_priv *bat_priv,
struct hard_iface *hard_iface) struct hard_iface *hard_iface)
{ {
struct batman_packet *batman_packet; realloc_packet_buffer(hard_iface, BATMAN_OGM_LEN);
return 0;
realloc_packet_buffer(hard_iface, BAT_PACKET_LEN);
batman_packet = (struct batman_packet *)hard_iface->packet_buff;
batman_packet->tt_num_changes = 0;
} }
void schedule_own_packet(struct hard_iface *hard_iface) void schedule_bat_ogm(struct hard_iface *hard_iface)
{ {
struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
struct hard_iface *primary_if; struct hard_iface *primary_if;
unsigned long send_time; int tt_num_changes = -1;
struct batman_packet *batman_packet;
int vis_server;
if ((hard_iface->if_status == IF_NOT_IN_USE) || if ((hard_iface->if_status == IF_NOT_IN_USE) ||
(hard_iface->if_status == IF_TO_BE_REMOVED)) (hard_iface->if_status == IF_TO_BE_REMOVED))
return; return;
vis_server = atomic_read(&bat_priv->vis_mode);
primary_if = primary_if_get_selected(bat_priv);
/** /**
* the interface gets activated here to avoid race conditions between * the interface gets activated here to avoid race conditions between
* the moment of activating the interface in * the moment of activating the interface in
...@@ -306,124 +149,26 @@ void schedule_own_packet(struct hard_iface *hard_iface) ...@@ -306,124 +149,26 @@ void schedule_own_packet(struct hard_iface *hard_iface)
if (hard_iface->if_status == IF_TO_BE_ACTIVATED) if (hard_iface->if_status == IF_TO_BE_ACTIVATED)
hard_iface->if_status = IF_ACTIVE; hard_iface->if_status = IF_ACTIVE;
primary_if = primary_if_get_selected(bat_priv);
if (hard_iface == primary_if) { if (hard_iface == primary_if) {
/* if at least one change happened */ /* if at least one change happened */
if (atomic_read(&bat_priv->tt_local_changes) > 0) { if (atomic_read(&bat_priv->tt_local_changes) > 0) {
tt_commit_changes(bat_priv); tt_commit_changes(bat_priv);
prepare_packet_buffer(bat_priv, hard_iface); tt_num_changes = prepare_packet_buffer(bat_priv,
hard_iface);
} }
/* if the changes have been sent often enough */ /* if the changes have been sent often enough */
if (!atomic_dec_not_zero(&bat_priv->tt_ogm_append_cnt)) if (!atomic_dec_not_zero(&bat_priv->tt_ogm_append_cnt))
reset_packet_buffer(bat_priv, hard_iface); tt_num_changes = reset_packet_buffer(bat_priv,
hard_iface);
} }
/**
* NOTE: packet_buff might just have been re-allocated in
* prepare_packet_buffer() or in reset_packet_buffer()
*/
batman_packet = (struct batman_packet *)hard_iface->packet_buff;
/* change sequence number to network order */
batman_packet->seqno =
htonl((uint32_t)atomic_read(&hard_iface->seqno));
batman_packet->ttvn = atomic_read(&bat_priv->ttvn);
batman_packet->tt_crc = htons((uint16_t)atomic_read(&bat_priv->tt_crc));
if (vis_server == VIS_TYPE_SERVER_SYNC)
batman_packet->flags |= VIS_SERVER;
else
batman_packet->flags &= ~VIS_SERVER;
if ((hard_iface == primary_if) &&
(atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER))
batman_packet->gw_flags =
(uint8_t)atomic_read(&bat_priv->gw_bandwidth);
else
batman_packet->gw_flags = NO_FLAGS;
atomic_inc(&hard_iface->seqno);
slide_own_bcast_window(hard_iface);
send_time = own_send_time(bat_priv);
add_bat_packet_to_list(bat_priv,
hard_iface->packet_buff,
hard_iface->packet_len,
hard_iface, 1, send_time);
if (primary_if) if (primary_if)
hardif_free_ref(primary_if); hardif_free_ref(primary_if);
}
void schedule_forward_packet(struct orig_node *orig_node,
const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
int directlink,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *router;
uint8_t in_tq, in_ttl, tq_avg = 0;
unsigned long send_time;
uint8_t tt_num_changes;
if (batman_packet->ttl <= 1) {
bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n");
return;
}
router = orig_node_get_router(orig_node);
in_tq = batman_packet->tq;
in_ttl = batman_packet->ttl;
tt_num_changes = batman_packet->tt_num_changes;
batman_packet->ttl--;
memcpy(batman_packet->prev_sender, ethhdr->h_source, ETH_ALEN);
/* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast
* of our best tq value */
if (router && router->tq_avg != 0) {
/* rebroadcast ogm of best ranking neighbor as is */
if (!compare_eth(router->addr, ethhdr->h_source)) {
batman_packet->tq = router->tq_avg;
if (router->last_ttl)
batman_packet->ttl = router->last_ttl - 1;
}
tq_avg = router->tq_avg;
}
if (router)
neigh_node_free_ref(router);
/* apply hop penalty */
batman_packet->tq = hop_penalty(batman_packet->tq, bat_priv);
bat_dbg(DBG_BATMAN, bat_priv,
"Forwarding packet: tq_orig: %i, tq_avg: %i, "
"tq_forw: %i, ttl_orig: %i, ttl_forw: %i\n",
in_tq, tq_avg, batman_packet->tq, in_ttl - 1,
batman_packet->ttl);
batman_packet->seqno = htonl(batman_packet->seqno);
batman_packet->tt_crc = htons(batman_packet->tt_crc);
/* switch of primaries first hop flag when forwarding */
batman_packet->flags &= ~PRIMARIES_FIRST_HOP;
if (directlink)
batman_packet->flags |= DIRECTLINK;
else
batman_packet->flags &= ~DIRECTLINK;
send_time = forward_send_time(); bat_ogm_schedule(hard_iface, tt_num_changes);
add_bat_packet_to_list(bat_priv,
(unsigned char *)batman_packet,
sizeof(*batman_packet) + tt_len(tt_num_changes),
if_incoming, 0, send_time);
} }
static void forw_packet_free(struct forw_packet *forw_packet) static void forw_packet_free(struct forw_packet *forw_packet)
...@@ -557,7 +302,7 @@ static void send_outstanding_bcast_packet(struct work_struct *work) ...@@ -557,7 +302,7 @@ static void send_outstanding_bcast_packet(struct work_struct *work)
atomic_inc(&bat_priv->bcast_queue_left); atomic_inc(&bat_priv->bcast_queue_left);
} }
void send_outstanding_bat_packet(struct work_struct *work) void send_outstanding_bat_ogm_packet(struct work_struct *work)
{ {
struct delayed_work *delayed_work = struct delayed_work *delayed_work =
container_of(work, struct delayed_work, work); container_of(work, struct delayed_work, work);
...@@ -573,7 +318,7 @@ void send_outstanding_bat_packet(struct work_struct *work) ...@@ -573,7 +318,7 @@ void send_outstanding_bat_packet(struct work_struct *work)
if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING) if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING)
goto out; goto out;
send_packet(forw_packet); bat_ogm_emit(forw_packet);
/** /**
* we have to have at least one packet in the queue * we have to have at least one packet in the queue
...@@ -581,7 +326,7 @@ void send_outstanding_bat_packet(struct work_struct *work) ...@@ -581,7 +326,7 @@ void send_outstanding_bat_packet(struct work_struct *work)
* shutting down * shutting down
*/ */
if (forw_packet->own) if (forw_packet->own)
schedule_own_packet(forw_packet->if_incoming); schedule_bat_ogm(forw_packet->if_incoming);
out: out:
/* don't count own packet */ /* don't count own packet */
......
net/batman-adv/send.h
View file @ 0c070900
...@@ -24,15 +24,10 @@ ...@@ -24,15 +24,10 @@
int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface, int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface,
const uint8_t *dst_addr); const uint8_t *dst_addr);
void schedule_own_packet(struct hard_iface *hard_iface); void schedule_bat_ogm(struct hard_iface *hard_iface);
void schedule_forward_packet(struct orig_node *orig_node,
const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
int directlink,
struct hard_iface *if_outgoing);
int add_bcast_packet_to_list(struct bat_priv *bat_priv, int add_bcast_packet_to_list(struct bat_priv *bat_priv,
const struct sk_buff *skb, unsigned long delay); const struct sk_buff *skb, unsigned long delay);
void send_outstanding_bat_packet(struct work_struct *work); void send_outstanding_bat_ogm_packet(struct work_struct *work);
void purge_outstanding_packets(struct bat_priv *bat_priv, void purge_outstanding_packets(struct bat_priv *bat_priv,
const struct hard_iface *hard_iface); const struct hard_iface *hard_iface);
......
net/batman-adv/soft-interface.c
View file @ 0c070900
...@@ -445,30 +445,31 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev, ...@@ -445,30 +445,31 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
{ {
struct bat_priv *bat_priv = netdev_priv(dev); struct bat_priv *bat_priv = netdev_priv(dev);
struct ethhdr *ethhdr = (struct ethhdr *)skb->data; struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct batman_packet *batman_packet; struct batman_ogm_packet *batman_ogm_packet;
struct softif_neigh *softif_neigh = NULL; struct softif_neigh *softif_neigh = NULL;
struct hard_iface *primary_if = NULL; struct hard_iface *primary_if = NULL;
struct softif_neigh *curr_softif_neigh = NULL; struct softif_neigh *curr_softif_neigh = NULL;
if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
batman_packet = (struct batman_packet *) batman_ogm_packet = (struct batman_ogm_packet *)
(skb->data + ETH_HLEN + VLAN_HLEN); (skb->data + ETH_HLEN + VLAN_HLEN);
else else
batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN); batman_ogm_packet = (struct batman_ogm_packet *)
(skb->data + ETH_HLEN);
if (batman_packet->version != COMPAT_VERSION) if (batman_ogm_packet->version != COMPAT_VERSION)
goto out; goto out;
if (batman_packet->packet_type != BAT_PACKET) if (batman_ogm_packet->packet_type != BAT_OGM)
goto out; goto out;
if (!(batman_packet->flags & PRIMARIES_FIRST_HOP)) if (!(batman_ogm_packet->flags & PRIMARIES_FIRST_HOP))
goto out; goto out;
if (is_my_mac(batman_packet->orig)) if (is_my_mac(batman_ogm_packet->orig))
goto out; goto out;
softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid); softif_neigh = softif_neigh_get(bat_priv, batman_ogm_packet->orig, vid);
if (!softif_neigh) if (!softif_neigh)
goto out; goto out;
...@@ -800,10 +801,8 @@ struct net_device *softif_create(const char *name) ...@@ -800,10 +801,8 @@ struct net_device *softif_create(const char *name)
soft_iface = alloc_netdev(sizeof(*bat_priv), name, interface_setup); soft_iface = alloc_netdev(sizeof(*bat_priv), name, interface_setup);
if (!soft_iface) { if (!soft_iface)
pr_err("Unable to allocate the batman interface: %s\n", name);
goto out; goto out;
}
ret = register_netdevice(soft_iface); ret = register_netdevice(soft_iface);
if (ret < 0) { if (ret < 0) {
......
net/batman-adv/vis.c
View file @ 0c070900
...@@ -887,10 +887,8 @@ int vis_init(struct bat_priv *bat_priv) ...@@ -887,10 +887,8 @@ int vis_init(struct bat_priv *bat_priv)
} }
bat_priv->my_vis_info = kmalloc(MAX_VIS_PACKET_SIZE, GFP_ATOMIC); bat_priv->my_vis_info = kmalloc(MAX_VIS_PACKET_SIZE, GFP_ATOMIC);
if (!bat_priv->my_vis_info) { if (!bat_priv->my_vis_info)
pr_err("Can't initialize vis packet\n");
goto err; goto err;
}
bat_priv->my_vis_info->skb_packet = dev_alloc_skb(sizeof(*packet) + bat_priv->my_vis_info->skb_packet = dev_alloc_skb(sizeof(*packet) +
MAX_VIS_PACKET_SIZE + MAX_VIS_PACKET_SIZE +
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7