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This feature/cleanup patchset includes the following patches: 

- bump version strings, by Simon Wunderlich
 
  - drop prandom.h includes, by Sven Eckelmann
 
  - fix mailing list address, by Sven Eckelmann
 
  - multicast feature preparation, by Linus Lüssing (2 patches)
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Merge tag 'batadv-next-pullrequest-20230127' of git://git.open-mesh.org/linux-merge

Simon Wunderlich says:

====================
This feature/cleanup patchset includes the following patches:

 - bump version strings, by Simon Wunderlich

 - drop prandom.h includes, by Sven Eckelmann

 - fix mailing list address, by Sven Eckelmann

 - multicast feature preparation, by Linus Lüssing (2 patches)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2023-01-30 07:33:06 +00:00
parent 5c0862c2c9 0c4061c0d0
commit 5dd3beba22
17 changed files with 110 additions and 323 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/networking/batman-adv.rst
View File

@ -159,7 +159,7 @@ Please send us comments, experiences, questions, anything :)
IRC:
#batadv on ircs://irc.hackint.org/
Mailing-list:
b.a.t.m.a.n@open-mesh.org (optional subscription at
b.a.t.m.a.n@lists.open-mesh.org (optional subscription at
https://lists.open-mesh.org/mailman3/postorius/lists/b.a.t.m.a.n.lists.open-mesh.org/)
You can also contact the Authors:

2
include/uapi/linux/batadv_packet.h
View File

@ -26,6 +26,7 @@
* @BATADV_CODED: network coded packets
* @BATADV_ELP: echo location packets for B.A.T.M.A.N. V
* @BATADV_OGM2: originator messages for B.A.T.M.A.N. V
* @BATADV_MCAST: multicast packet with multiple destination addresses
*
* @BATADV_UNICAST: unicast packets carrying unicast payload traffic
* @BATADV_UNICAST_FRAG: unicast packets carrying a fragment of the original
@ -42,6 +43,7 @@ enum batadv_packettype {
BATADV_CODED = 0x02,
BATADV_ELP = 0x03,
BATADV_OGM2 = 0x04,
BATADV_MCAST = 0x05,
/* 0x40 - 0x7f: unicast */
#define BATADV_UNICAST_MIN 0x40
BATADV_UNICAST = 0x40,

1
net/batman-adv/bat_iv_ogm.c
View File

@ -27,7 +27,6 @@
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/pkt_sched.h>
#include <linux/prandom.h>
#include <linux/printk.h>
#include <linux/random.h>
#include <linux/rculist.h>

1
net/batman-adv/bat_v_elp.c
View File

@ -21,7 +21,6 @@
#include <linux/minmax.h>
#include <linux/netdevice.h>
#include <linux/nl80211.h>
#include <linux/prandom.h>
#include <linux/random.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>

5
net/batman-adv/bat_v_ogm.c
View File

@ -21,7 +21,6 @@
#include <linux/minmax.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/prandom.h>
#include <linux/random.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
@ -800,8 +799,8 @@ batadv_v_ogm_process_per_outif(struct batadv_priv *bat_priv,
/* only unknown & newer OGMs contain TVLVs we are interested in */
if (seqno_age > 0 && if_outgoing == BATADV_IF_DEFAULT)
batadv_tvlv_containers_process(bat_priv, true, orig_node,
NULL, NULL,
batadv_tvlv_containers_process(bat_priv, BATADV_OGM2, orig_node,
NULL,
(unsigned char *)(ogm2 + 1),
ntohs(ogm2->tvlv_len));

2
net/batman-adv/distributed-arp-table.c
View File

@ -822,7 +822,7 @@ int batadv_dat_init(struct batadv_priv *bat_priv)
batadv_dat_start_timer(bat_priv);
batadv_tvlv_handler_register(bat_priv, batadv_dat_tvlv_ogm_handler_v1,
NULL, BATADV_TVLV_DAT, 1,
NULL, NULL, BATADV_TVLV_DAT, 1,
BATADV_TVLV_HANDLER_OGM_CIFNOTFND);
batadv_dat_tvlv_container_update(bat_priv);
return 0;

2
net/batman-adv/gateway_common.c
View File

@ -259,7 +259,7 @@ void batadv_gw_init(struct batadv_priv *bat_priv)
atomic_set(&bat_priv->gw.sel_class, 1);
batadv_tvlv_handler_register(bat_priv, batadv_gw_tvlv_ogm_handler_v1,
NULL, BATADV_TVLV_GW, 1,
NULL, NULL, BATADV_TVLV_GW, 1,
BATADV_TVLV_HANDLER_OGM_CIFNOTFND);
}

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

@ -13,7 +13,7 @@
#define BATADV_DRIVER_DEVICE "batman-adv"
#ifndef BATADV_SOURCE_VERSION
#define BATADV_SOURCE_VERSION "2022.3"
#define BATADV_SOURCE_VERSION "2023.1"
#endif
/* B.A.T.M.A.N. parameters */

251
net/batman-adv/multicast.c
View File

@ -26,7 +26,6 @@
#include <linux/ipv6.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/lockdep.h>
#include <linux/netdevice.h>
@ -1136,223 +1135,20 @@ static int batadv_mcast_forw_rtr_count(struct batadv_priv *bat_priv,
}
}
/**
* batadv_mcast_forw_tt_node_get() - get a multicast tt node
* @bat_priv: the bat priv with all the soft interface information
* @ethhdr: the ether header containing the multicast destination
*
* Return: an orig_node matching the multicast address provided by ethhdr
* via a translation table lookup. This increases the returned nodes refcount.
*/
static struct batadv_orig_node *
batadv_mcast_forw_tt_node_get(struct batadv_priv *bat_priv,
struct ethhdr *ethhdr)
{
return batadv_transtable_search(bat_priv, NULL, ethhdr->h_dest,
BATADV_NO_FLAGS);
}
/**
* batadv_mcast_forw_ipv4_node_get() - get a node with an ipv4 flag
* @bat_priv: the bat priv with all the soft interface information
*
* Return: an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 flag set and
* increases its refcount.
*/
static struct batadv_orig_node *
batadv_mcast_forw_ipv4_node_get(struct batadv_priv *bat_priv)
{
struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_orig_node,
&bat_priv->mcast.want_all_ipv4_list,
mcast_want_all_ipv4_node) {
if (!kref_get_unless_zero(&tmp_orig_node->refcount))
continue;
orig_node = tmp_orig_node;
break;
}
rcu_read_unlock();
return orig_node;
}
/**
* batadv_mcast_forw_ipv6_node_get() - get a node with an ipv6 flag
* @bat_priv: the bat priv with all the soft interface information
*
* Return: an orig_node which has the BATADV_MCAST_WANT_ALL_IPV6 flag set
* and increases its refcount.
*/
static struct batadv_orig_node *
batadv_mcast_forw_ipv6_node_get(struct batadv_priv *bat_priv)
{
struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_orig_node,
&bat_priv->mcast.want_all_ipv6_list,
mcast_want_all_ipv6_node) {
if (!kref_get_unless_zero(&tmp_orig_node->refcount))
continue;
orig_node = tmp_orig_node;
break;
}
rcu_read_unlock();
return orig_node;
}
/**
* batadv_mcast_forw_ip_node_get() - get a node with an ipv4/ipv6 flag
* @bat_priv: the bat priv with all the soft interface information
* @ethhdr: an ethernet header to determine the protocol family from
*
* Return: an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 or
* BATADV_MCAST_WANT_ALL_IPV6 flag, depending on the provided ethhdr, sets and
* increases its refcount.
*/
static struct batadv_orig_node *
batadv_mcast_forw_ip_node_get(struct batadv_priv *bat_priv,
struct ethhdr *ethhdr)
{
switch (ntohs(ethhdr->h_proto)) {
case ETH_P_IP:
return batadv_mcast_forw_ipv4_node_get(bat_priv);
case ETH_P_IPV6:
return batadv_mcast_forw_ipv6_node_get(bat_priv);
default:
/* we shouldn't be here... */
return NULL;
}
}
/**
* batadv_mcast_forw_unsnoop_node_get() - get a node with an unsnoopable flag
* @bat_priv: the bat priv with all the soft interface information
*
* Return: an orig_node which has the BATADV_MCAST_WANT_ALL_UNSNOOPABLES flag
* set and increases its refcount.
*/
static struct batadv_orig_node *
batadv_mcast_forw_unsnoop_node_get(struct batadv_priv *bat_priv)
{
struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_orig_node,
&bat_priv->mcast.want_all_unsnoopables_list,
mcast_want_all_unsnoopables_node) {
if (!kref_get_unless_zero(&tmp_orig_node->refcount))
continue;
orig_node = tmp_orig_node;
break;
}
rcu_read_unlock();
return orig_node;
}
/**
* batadv_mcast_forw_rtr4_node_get() - get a node with an ipv4 mcast router flag
* @bat_priv: the bat priv with all the soft interface information
*
* Return: an orig_node which has the BATADV_MCAST_WANT_NO_RTR4 flag unset and
* increases its refcount.
*/
static struct batadv_orig_node *
batadv_mcast_forw_rtr4_node_get(struct batadv_priv *bat_priv)
{
struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_orig_node,
&bat_priv->mcast.want_all_rtr4_list,
mcast_want_all_rtr4_node) {
if (!kref_get_unless_zero(&tmp_orig_node->refcount))
continue;
orig_node = tmp_orig_node;
break;
}
rcu_read_unlock();
return orig_node;
}
/**
* batadv_mcast_forw_rtr6_node_get() - get a node with an ipv6 mcast router flag
* @bat_priv: the bat priv with all the soft interface information
*
* Return: an orig_node which has the BATADV_MCAST_WANT_NO_RTR6 flag unset
* and increases its refcount.
*/
static struct batadv_orig_node *
batadv_mcast_forw_rtr6_node_get(struct batadv_priv *bat_priv)
{
struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_orig_node,
&bat_priv->mcast.want_all_rtr6_list,
mcast_want_all_rtr6_node) {
if (!kref_get_unless_zero(&tmp_orig_node->refcount))
continue;
orig_node = tmp_orig_node;
break;
}
rcu_read_unlock();
return orig_node;
}
/**
* batadv_mcast_forw_rtr_node_get() - get a node with an ipv4/ipv6 router flag
* @bat_priv: the bat priv with all the soft interface information
* @ethhdr: an ethernet header to determine the protocol family from
*
* Return: an orig_node which has no BATADV_MCAST_WANT_NO_RTR4 or
* BATADV_MCAST_WANT_NO_RTR6 flag, depending on the provided ethhdr, set and
* increases its refcount.
*/
static struct batadv_orig_node *
batadv_mcast_forw_rtr_node_get(struct batadv_priv *bat_priv,
struct ethhdr *ethhdr)
{
switch (ntohs(ethhdr->h_proto)) {
case ETH_P_IP:
return batadv_mcast_forw_rtr4_node_get(bat_priv);
case ETH_P_IPV6:
return batadv_mcast_forw_rtr6_node_get(bat_priv);
default:
/* we shouldn't be here... */
return NULL;
}
}
/**
* batadv_mcast_forw_mode() - check on how to forward a multicast packet
* @bat_priv: the bat priv with all the soft interface information
* @skb: The multicast packet to check
* @orig: an originator to be set to forward the skb to
* @skb: the multicast packet to check
* @is_routable: stores whether the destination is routable
*
* Return: the forwarding mode as enum batadv_forw_mode and in case of
* BATADV_FORW_SINGLE set the orig to the single originator the skb
* should be forwarded to.
* Return: The forwarding mode as enum batadv_forw_mode.
*/
enum batadv_forw_mode
batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
struct batadv_orig_node **orig, int *is_routable)
int *is_routable)
{
int ret, tt_count, ip_count, unsnoop_count, total_count;
bool is_unsnoopable = false;
unsigned int mcast_fanout;
struct ethhdr *ethhdr;
int rtr_count = 0;
@ -1361,7 +1157,7 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
if (ret == -ENOMEM)
return BATADV_FORW_NONE;
else if (ret < 0)
return BATADV_FORW_ALL;
return BATADV_FORW_BCAST;
ethhdr = eth_hdr(skb);
@ -1374,32 +1170,15 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
total_count = tt_count + ip_count + unsnoop_count + rtr_count;
switch (total_count) {
case 1:
if (tt_count)
*orig = batadv_mcast_forw_tt_node_get(bat_priv, ethhdr);
else if (ip_count)
*orig = batadv_mcast_forw_ip_node_get(bat_priv, ethhdr);
else if (unsnoop_count)
*orig = batadv_mcast_forw_unsnoop_node_get(bat_priv);
else if (rtr_count)
*orig = batadv_mcast_forw_rtr_node_get(bat_priv,
ethhdr);
if (*orig)
return BATADV_FORW_SINGLE;
fallthrough;
case 0:
if (!total_count)
return BATADV_FORW_NONE;
default:
mcast_fanout = atomic_read(&bat_priv->multicast_fanout);
else if (unsnoop_count)
return BATADV_FORW_BCAST;
if (!unsnoop_count && total_count <= mcast_fanout)
return BATADV_FORW_SOME;
}
if (total_count <= atomic_read(&bat_priv->multicast_fanout))
return BATADV_FORW_UCASTS;
return BATADV_FORW_ALL;
return BATADV_FORW_BCAST;
}
/**
@ -1411,10 +1190,10 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
*
* Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
*/
int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
struct sk_buff *skb,
unsigned short vid,
struct batadv_orig_node *orig_node)
static int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
struct sk_buff *skb,
unsigned short vid,
struct batadv_orig_node *orig_node)
{
/* Avoid sending multicast-in-unicast packets to other BLA
* gateways - they already got the frame from the LAN side
@ -2039,7 +1818,7 @@ static void batadv_mcast_tvlv_ogm_handler(struct batadv_priv *bat_priv,
void batadv_mcast_init(struct batadv_priv *bat_priv)
{
batadv_tvlv_handler_register(bat_priv, batadv_mcast_tvlv_ogm_handler,
NULL, BATADV_TVLV_MCAST, 2,
NULL, NULL, BATADV_TVLV_MCAST, 2,
BATADV_TVLV_HANDLER_OGM_CIFNOTFND);
INIT_DELAYED_WORK(&bat_priv->mcast.work, batadv_mcast_mla_update);

38
net/batman-adv/multicast.h
View File

@ -17,23 +17,16 @@
*/
enum batadv_forw_mode {
/**
* @BATADV_FORW_ALL: forward the packet to all nodes (currently via
* classic flooding)
* @BATADV_FORW_BCAST: forward the packet to all nodes via a batman-adv
* broadcast packet
*/
BATADV_FORW_ALL,
BATADV_FORW_BCAST,
/**
* @BATADV_FORW_SOME: forward the packet to some nodes (currently via
* a multicast-to-unicast conversion and the BATMAN unicast routing
* protocol)
* @BATADV_FORW_UCASTS: forward the packet to some nodes via one
* or more batman-adv unicast packets
*/
BATADV_FORW_SOME,
/**
* @BATADV_FORW_SINGLE: forward the packet to a single node (currently
* via the BATMAN unicast routing protocol)
*/
BATADV_FORW_SINGLE,
BATADV_FORW_UCASTS,
/** @BATADV_FORW_NONE: don't forward, drop it */
BATADV_FORW_NONE,
@ -43,14 +36,8 @@ enum batadv_forw_mode {
enum batadv_forw_mode
batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
struct batadv_orig_node **mcast_single_orig,
int *is_routable);
int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
struct sk_buff *skb,
unsigned short vid,
struct batadv_orig_node *orig_node);
int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
unsigned short vid, int is_routable);
@ -69,20 +56,9 @@ void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
static inline enum batadv_forw_mode
batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
struct batadv_orig_node **mcast_single_orig,
int *is_routable)
{
return BATADV_FORW_ALL;
}
static inline int
batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
struct sk_buff *skb,
unsigned short vid,
struct batadv_orig_node *orig_node)
{
kfree_skb(skb);
return NET_XMIT_DROP;
return BATADV_FORW_BCAST;
}
static inline int

4
net/batman-adv/network-coding.c
View File

@ -25,8 +25,8 @@
#include <linux/lockdep.h>
#include <linux/net.h>
#include <linux/netdevice.h>
#include <linux/prandom.h>
#include <linux/printk.h>
#include <linux/random.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/skbuff.h>
@ -160,7 +160,7 @@ int batadv_nc_mesh_init(struct batadv_priv *bat_priv)
batadv_nc_start_timer(bat_priv);
batadv_tvlv_handler_register(bat_priv, batadv_nc_tvlv_ogm_handler_v1,
NULL, BATADV_TVLV_NC, 1,
NULL, NULL, BATADV_TVLV_NC, 1,
BATADV_TVLV_HANDLER_OGM_CIFNOTFND);
batadv_nc_tvlv_container_update(bat_priv);
return 0;

7
net/batman-adv/routing.c
View File

@ -1073,10 +1073,9 @@ int batadv_recv_unicast_tvlv(struct sk_buff *skb,
if (tvlv_buff_len > skb->len - hdr_size)
goto free_skb;
ret = batadv_tvlv_containers_process(bat_priv, false, NULL,
unicast_tvlv_packet->src,
unicast_tvlv_packet->dst,
tvlv_buff, tvlv_buff_len);
ret = batadv_tvlv_containers_process(bat_priv, BATADV_UNICAST_TVLV,
NULL, skb, tvlv_buff,
tvlv_buff_len);
if (ret != NET_RX_SUCCESS) {
ret = batadv_route_unicast_packet(skb, recv_if);

26
net/batman-adv/soft-interface.c
View File

@ -48,7 +48,6 @@
#include "hard-interface.h"
#include "multicast.h"
#include "network-coding.h"
#include "originator.h"
#include "send.h"
#include "translation-table.h"
@ -196,8 +195,7 @@ static netdev_tx_t batadv_interface_tx(struct sk_buff *skb,
unsigned short vid;
u32 seqno;
int gw_mode;
enum batadv_forw_mode forw_mode = BATADV_FORW_SINGLE;
struct batadv_orig_node *mcast_single_orig = NULL;
enum batadv_forw_mode forw_mode = BATADV_FORW_BCAST;
int mcast_is_routable = 0;
int network_offset = ETH_HLEN;
__be16 proto;
@ -301,14 +299,18 @@ static netdev_tx_t batadv_interface_tx(struct sk_buff *skb,
send:
if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {
forw_mode = batadv_mcast_forw_mode(bat_priv, skb,
&mcast_single_orig,
&mcast_is_routable);
if (forw_mode == BATADV_FORW_NONE)
goto dropped;
if (forw_mode == BATADV_FORW_SINGLE ||
forw_mode == BATADV_FORW_SOME)
switch (forw_mode) {
case BATADV_FORW_BCAST:
break;
case BATADV_FORW_UCASTS:
do_bcast = false;
break;
case BATADV_FORW_NONE:
fallthrough;
default:
goto dropped;
}
}
}
@ -357,10 +359,7 @@ send:
if (ret)
goto dropped;
ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
} else if (mcast_single_orig) {
ret = batadv_mcast_forw_send_orig(bat_priv, skb, vid,
mcast_single_orig);
} else if (forw_mode == BATADV_FORW_SOME) {
} else if (forw_mode == BATADV_FORW_UCASTS) {
ret = batadv_mcast_forw_send(bat_priv, skb, vid,
mcast_is_routable);
} else {
@ -386,7 +385,6 @@ dropped:
dropped_freed:
batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
end:
batadv_orig_node_put(mcast_single_orig);
batadv_hardif_put(primary_if);
return NETDEV_TX_OK;
}

4
net/batman-adv/translation-table.c
View File

@ -4168,11 +4168,11 @@ int batadv_tt_init(struct batadv_priv *bat_priv)
}
batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1,
batadv_tt_tvlv_unicast_handler_v1,
batadv_tt_tvlv_unicast_handler_v1, NULL,
BATADV_TVLV_TT, 1, BATADV_NO_FLAGS);
batadv_tvlv_handler_register(bat_priv, NULL,
batadv_roam_tvlv_unicast_handler_v1,
batadv_roam_tvlv_unicast_handler_v1, NULL,
BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS);
INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge);

71
net/batman-adv/tvlv.c
View File

@ -352,10 +352,9 @@ end:
* appropriate handlers
* @bat_priv: the bat priv with all the soft interface information
* @tvlv_handler: tvlv callback function handling the tvlv content
* @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet
* @packet_type: indicates for which packet type the TVLV handler is called
* @orig_node: orig node emitting the ogm packet
* @src: source mac address of the unicast packet
* @dst: destination mac address of the unicast packet
* @skb: the skb the TVLV handler is called for
* @tvlv_value: tvlv content
* @tvlv_value_len: tvlv content length
*
@ -364,15 +363,20 @@ end:
*/
static int batadv_tvlv_call_handler(struct batadv_priv *bat_priv,
struct batadv_tvlv_handler *tvlv_handler,
bool ogm_source,
u8 packet_type,
struct batadv_orig_node *orig_node,
u8 *src, u8 *dst,
void *tvlv_value, u16 tvlv_value_len)
struct sk_buff *skb, void *tvlv_value,
u16 tvlv_value_len)
{
unsigned int tvlv_offset;
u8 *src, *dst;
if (!tvlv_handler)
return NET_RX_SUCCESS;
if (ogm_source) {
switch (packet_type) {
case BATADV_IV_OGM:
case BATADV_OGM2:
if (!tvlv_handler->ogm_handler)
return NET_RX_SUCCESS;
@ -383,19 +387,32 @@ static int batadv_tvlv_call_handler(struct batadv_priv *bat_priv,
BATADV_NO_FLAGS,
tvlv_value, tvlv_value_len);
tvlv_handler->flags |= BATADV_TVLV_HANDLER_OGM_CALLED;
} else {
if (!src)
return NET_RX_SUCCESS;
if (!dst)
break;
case BATADV_UNICAST_TVLV:
if (!skb)
return NET_RX_SUCCESS;
if (!tvlv_handler->unicast_handler)
return NET_RX_SUCCESS;
src = ((struct batadv_unicast_tvlv_packet *)skb->data)->src;
dst = ((struct batadv_unicast_tvlv_packet *)skb->data)->dst;
return tvlv_handler->unicast_handler(bat_priv, src,
dst, tvlv_value,
tvlv_value_len);
case BATADV_MCAST:
if (!skb)
return NET_RX_SUCCESS;
if (!tvlv_handler->mcast_handler)
return NET_RX_SUCCESS;
tvlv_offset = (unsigned char *)tvlv_value - skb->data;
skb_set_network_header(skb, tvlv_offset);
skb_set_transport_header(skb, tvlv_offset + tvlv_value_len);
return tvlv_handler->mcast_handler(bat_priv, skb);
}
return NET_RX_SUCCESS;
@ -405,10 +422,9 @@ static int batadv_tvlv_call_handler(struct batadv_priv *bat_priv,
* batadv_tvlv_containers_process() - parse the given tvlv buffer to call the
* appropriate handlers
* @bat_priv: the bat priv with all the soft interface information
* @ogm_source: flag indicating whether the tvlv is an ogm or a unicast packet
* @packet_type: indicates for which packet type the TVLV handler is called
* @orig_node: orig node emitting the ogm packet
* @src: source mac address of the unicast packet
* @dst: destination mac address of the unicast packet
* @skb: the skb the TVLV handler is called for
* @tvlv_value: tvlv content
* @tvlv_value_len: tvlv content length
*
@ -416,10 +432,10 @@ static int batadv_tvlv_call_handler(struct batadv_priv *bat_priv,
* handler callbacks.
*/
int batadv_tvlv_containers_process(struct batadv_priv *bat_priv,
bool ogm_source,
u8 packet_type,
struct batadv_orig_node *orig_node,
u8 *src, u8 *dst,
void *tvlv_value, u16 tvlv_value_len)
struct sk_buff *skb, void *tvlv_value,
u16 tvlv_value_len)
{
struct batadv_tvlv_handler *tvlv_handler;
struct batadv_tvlv_hdr *tvlv_hdr;
@ -441,20 +457,24 @@ int batadv_tvlv_containers_process(struct batadv_priv *bat_priv,
tvlv_hdr->version);
ret |= batadv_tvlv_call_handler(bat_priv, tvlv_handler,
ogm_source, orig_node,
src, dst, tvlv_value,
packet_type, orig_node, skb,
tvlv_value,
tvlv_value_cont_len);
batadv_tvlv_handler_put(tvlv_handler);
tvlv_value = (u8 *)tvlv_value + tvlv_value_cont_len;
tvlv_value_len -= tvlv_value_cont_len;
}
if (!ogm_source)
if (packet_type != BATADV_IV_OGM &&
packet_type != BATADV_OGM2)
return ret;
rcu_read_lock();
hlist_for_each_entry_rcu(tvlv_handler,
&bat_priv->tvlv.handler_list, list) {
if (!tvlv_handler->ogm_handler)
continue;
if ((tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) &&
!(tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CALLED))
tvlv_handler->ogm_handler(bat_priv, orig_node,
@ -490,7 +510,7 @@ void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv,
tvlv_value = batadv_ogm_packet + 1;
batadv_tvlv_containers_process(bat_priv, true, orig_node, NULL, NULL,
batadv_tvlv_containers_process(bat_priv, BATADV_IV_OGM, orig_node, NULL,
tvlv_value, tvlv_value_len);
}
@ -504,6 +524,10 @@ void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv,
* @uptr: unicast tvlv handler callback function. This function receives the
* source & destination of the unicast packet as well as the tvlv content
* to process.
* @mptr: multicast packet tvlv handler callback function. This function
* receives the full skb to process, with the skb network header pointing
* to the current tvlv and the skb transport header pointing to the first
* byte after the current tvlv.
* @type: tvlv handler type to be registered
* @version: tvlv handler version to be registered
* @flags: flags to enable or disable TVLV API behavior
@ -518,6 +542,8 @@ void batadv_tvlv_handler_register(struct batadv_priv *bat_priv,
u8 *src, u8 *dst,
void *tvlv_value,
u16 tvlv_value_len),
int (*mptr)(struct batadv_priv *bat_priv,
struct sk_buff *skb),
u8 type, u8 version, u8 flags)
{
struct batadv_tvlv_handler *tvlv_handler;
@ -539,6 +565,7 @@ void batadv_tvlv_handler_register(struct batadv_priv *bat_priv,
tvlv_handler->ogm_handler = optr;
tvlv_handler->unicast_handler = uptr;
tvlv_handler->mcast_handler = mptr;
tvlv_handler->type = type;
tvlv_handler->version = version;
tvlv_handler->flags = flags;

9
net/batman-adv/tvlv.h
View File

@ -9,6 +9,7 @@
#include "main.h"
#include <linux/skbuff.h>
#include <linux/types.h>
#include <uapi/linux/batadv_packet.h>
@ -34,14 +35,16 @@ void batadv_tvlv_handler_register(struct batadv_priv *bat_priv,
u8 *src, u8 *dst,
void *tvlv_value,
u16 tvlv_value_len),
int (*mptr)(struct batadv_priv *bat_priv,
struct sk_buff *skb),
u8 type, u8 version, u8 flags);
void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv,
u8 type, u8 version);
int batadv_tvlv_containers_process(struct batadv_priv *bat_priv,
bool ogm_source,
u8 packet_type,
struct batadv_orig_node *orig_node,
u8 *src, u8 *dst,
void *tvlv_buff, u16 tvlv_buff_len);
struct sk_buff *skb, void *tvlv_buff,
u16 tvlv_buff_len);
void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, const u8 *src,
const u8 *dst, u8 type, u8 version,
void *tvlv_value, u16 tvlv_value_len);

6
net/batman-adv/types.h
View File

@ -2335,6 +2335,12 @@ struct batadv_tvlv_handler {
u8 *src, u8 *dst,
void *tvlv_value, u16 tvlv_value_len);
/**
* @mcast_handler: handler callback which is given the tvlv payload to
* process on incoming mcast packet
*/
int (*mcast_handler)(struct batadv_priv *bat_priv, struct sk_buff *skb);
/** @type: tvlv type this handler feels responsible for */
u8 type;